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// Copyright (c) 2026 Steve Gerbino
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// Copyright (c) 2026 Steve Gerbino
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// Official repository: https://github.com/cppalliance/corosio
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// Official repository: https://github.com/cppalliance/corosio
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#ifndef BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
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#ifndef BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
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#define BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
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#define BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
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#include <boost/corosio/detail/platform.hpp>
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#include <boost/corosio/detail/platform.hpp>
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#include <boost/corosio/native/detail/posix/posix_signal.hpp>
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#include <boost/corosio/native/detail/posix/posix_signal.hpp>
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#include <boost/corosio/detail/config.hpp>
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#include <boost/corosio/detail/config.hpp>
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#include <boost/capy/ex/execution_context.hpp>
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#include <boost/capy/ex/execution_context.hpp>
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#include <boost/corosio/detail/scheduler.hpp>
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#include <boost/corosio/detail/scheduler.hpp>
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#include <boost/capy/error.hpp>
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#include <boost/capy/error.hpp>
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Concrete signal service implementation for POSIX backends. Manages signal
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Concrete signal service implementation for POSIX backends. Manages signal
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registrations via sigaction() and dispatches completions through the
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registrations via sigaction() and dispatches completions through the
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scheduler. One instance per execution_context, created by
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scheduler. One instance per execution_context, created by
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See the block comment further down for the full architecture overview.
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See the block comment further down for the full architecture overview.
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POSIX Signal Implementation
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POSIX Signal Implementation
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===========================
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===========================
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This file implements signal handling for POSIX systems using sigaction().
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This file implements signal handling for POSIX systems using sigaction().
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The implementation supports signal flags (SA_RESTART, etc.) and integrates
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The implementation supports signal flags (SA_RESTART, etc.) and integrates
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with any POSIX-compatible scheduler via the abstract scheduler interface.
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with any POSIX-compatible scheduler via the abstract scheduler interface.
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Three layers manage signal registrations:
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Three layers manage signal registrations:
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1. signal_state (global singleton)
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1. signal_state (global singleton)
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- Tracks the global service list and per-signal registration counts
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- Tracks the global service list and per-signal registration counts
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- Stores the flags used for first registration of each signal (for
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- Stores the flags used for first registration of each signal (for
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conflict detection when multiple signal_sets register same signal)
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conflict detection when multiple signal_sets register same signal)
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- Owns the mutex that protects signal handler installation/removal
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- Owns the mutex that protects signal handler installation/removal
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2. posix_signal_service (one per execution_context)
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2. posix_signal_service (one per execution_context)
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- Maintains registrations_[] table indexed by signal number
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- Maintains registrations_[] table indexed by signal number
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- Each slot is a doubly-linked list of signal_registrations for that signal
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- Each slot is a doubly-linked list of signal_registrations for that signal
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- Also maintains impl_list_ of all posix_signal objects it owns
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- Also maintains impl_list_ of all posix_signal objects it owns
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3. posix_signal (one per signal_set)
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3. posix_signal (one per signal_set)
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- Owns a singly-linked list (sorted by signal number) of signal_registrations
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- Owns a singly-linked list (sorted by signal number) of signal_registrations
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- Contains the pending_op_ used for wait operations
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- Contains the pending_op_ used for wait operations
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1. Signal arrives -> corosio_posix_signal_handler() (must be async-signal-safe)
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1. Signal arrives -> corosio_posix_signal_handler() (must be async-signal-safe)
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2. deliver_signal() iterates all posix_signal_service services:
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2. deliver_signal() iterates all posix_signal_service services:
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- If a signal_set is waiting (impl->waiting_ == true), post the signal_op
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- If a signal_set is waiting (impl->waiting_ == true), post the signal_op
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to the scheduler for immediate completion
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to the scheduler for immediate completion
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- Otherwise, increment reg->undelivered to queue the signal
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- Otherwise, increment reg->undelivered to queue the signal
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3. When wait() is called via start_wait():
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3. When wait() is called via start_wait():
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- First check for queued signals (undelivered > 0); if found, post
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- First check for queued signals (undelivered > 0); if found, post
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immediate completion without blocking
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immediate completion without blocking
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- Otherwise, set waiting_ = true and call work_started() to keep
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- Otherwise, set waiting_ = true and call work_started() to keep
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Two mutex levels exist (MUST acquire in this order to avoid deadlock):
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Two mutex levels exist (MUST acquire in this order to avoid deadlock):
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1. signal_state::mutex - protects handler registration and service list
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1. signal_state::mutex - protects handler registration and service list
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2. posix_signal_service::mutex_ - protects per-service registration tables
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2. posix_signal_service::mutex_ - protects per-service registration tables
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Async-Signal-Safety Limitation
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Async-Signal-Safety Limitation
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------------------------------
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------------------------------
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IMPORTANT: deliver_signal() is called from signal handler context and
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IMPORTANT: deliver_signal() is called from signal handler context and
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acquires mutexes. This is NOT strictly async-signal-safe per POSIX.
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acquires mutexes. This is NOT strictly async-signal-safe per POSIX.
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- If a signal arrives while another thread holds state->mutex or
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- If a signal arrives while another thread holds state->mutex or
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service->mutex_, and that same thread receives the signal, a
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service->mutex_, and that same thread receives the signal, a
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deadlock can occur (self-deadlock on non-recursive mutex).
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deadlock can occur (self-deadlock on non-recursive mutex).
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This design trades strict async-signal-safety for implementation simplicity.
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This design trades strict async-signal-safety for implementation simplicity.
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In practice, deadlocks are rare because:
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In practice, deadlocks are rare because:
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- Mutexes are held only briefly during registration changes
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- Mutexes are held only briefly during registration changes
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- Most programs don't modify signal sets while signals are expected
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- Most programs don't modify signal sets while signals are expected
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- The window for signal arrival during mutex hold is small
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- The window for signal arrival during mutex hold is small
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A fully async-signal-safe implementation would require lock-free data
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A fully async-signal-safe implementation would require lock-free data
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structures and atomic operations throughout, significantly increasing
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structures and atomic operations throughout, significantly increasing
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- Flags are abstract values in the public API (signal_set::flags_t)
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- Flags are abstract values in the public API (signal_set::flags_t)
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- flags_supported() validates that requested flags are available on
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- flags_supported() validates that requested flags are available on
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this platform; returns false if SA_NOCLDWAIT is unavailable and
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this platform; returns false if SA_NOCLDWAIT is unavailable and
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no_child_wait is requested
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no_child_wait is requested
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- to_sigaction_flags() maps validated flags to actual SA_* constants
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- to_sigaction_flags() maps validated flags to actual SA_* constants
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- First registration of a signal establishes the flags; subsequent
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- First registration of a signal establishes the flags; subsequent
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registrations must be compatible (same flags or dont_care)
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registrations must be compatible (same flags or dont_care)
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- Requesting unavailable flags returns operation_not_supported
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- Requesting unavailable flags returns operation_not_supported
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When waiting for a signal:
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When waiting for a signal:
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- start_wait() calls sched_->work_started() to prevent io_context::run()
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- start_wait() calls sched_->work_started() to prevent io_context::run()
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from returning while we wait
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from returning while we wait
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- signal_op::svc is set to point to the service
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- signal_op::svc is set to point to the service
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- signal_op::operator()() calls work_finished() after resuming the coroutine
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- signal_op::operator()() calls work_finished() after resuming the coroutine
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If a signal was already queued (undelivered > 0), no work tracking is needed
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If a signal was already queued (undelivered > 0), no work tracking is needed
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because completion is posted immediately.
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because completion is posted immediately.
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namespace boost::corosio {
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namespace boost::corosio {
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/** Signal service for POSIX backends.
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/** Signal service for POSIX backends.
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Manages signal registrations via sigaction() and dispatches signal
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Manages signal registrations via sigaction() and dispatches signal
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completions through the scheduler. One instance per execution_context.
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completions through the scheduler. One instance per execution_context.
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class BOOST_COROSIO_DECL posix_signal_service final
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class BOOST_COROSIO_DECL posix_signal_service final
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: public capy::execution_context::service
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: public capy::execution_context::service
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, public io_object::io_service
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, public io_object::io_service
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using key_type = posix_signal_service;
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using key_type = posix_signal_service;
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posix_signal_service(capy::execution_context& ctx, scheduler& sched);
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posix_signal_service(capy::execution_context& ctx, scheduler& sched);
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~posix_signal_service() override;
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~posix_signal_service() override;
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posix_signal_service(posix_signal_service const&) = delete;
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posix_signal_service(posix_signal_service const&) = delete;
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posix_signal_service& operator=(posix_signal_service const&) = delete;
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posix_signal_service& operator=(posix_signal_service const&) = delete;
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io_object::implementation* construct() override;
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io_object::implementation* construct() override;
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void destroy(io_object::implementation* p) override
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void destroy(io_object::implementation* p) override
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auto& impl = static_cast<posix_signal&>(*p);
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auto& impl = static_cast<posix_signal&>(*p);
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[[maybe_unused]] auto n = impl.clear();
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[[maybe_unused]] auto n = impl.clear();
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void shutdown() override;
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void shutdown() override;
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void destroy_impl(posix_signal& impl);
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void destroy_impl(posix_signal& impl);
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std::error_code add_signal(
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std::error_code add_signal(
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posix_signal& impl, int signal_number, signal_set::flags_t flags);
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posix_signal& impl, int signal_number, signal_set::flags_t flags);
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std::error_code remove_signal(posix_signal& impl, int signal_number);
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std::error_code remove_signal(posix_signal& impl, int signal_number);
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std::error_code clear_signals(posix_signal& impl);
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std::error_code clear_signals(posix_signal& impl);
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void cancel_wait(posix_signal& impl);
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void cancel_wait(posix_signal& impl);
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void start_wait(posix_signal& impl, signal_op* op);
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void start_wait(posix_signal& impl, signal_op* op);
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static void deliver_signal(int signal_number);
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static void deliver_signal(int signal_number);
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void work_started() noexcept;
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void work_started() noexcept;
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void work_finished() noexcept;
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void work_finished() noexcept;
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void post(signal_op* op);
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void post(signal_op* op);
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static void add_service(posix_signal_service* service);
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static void add_service(posix_signal_service* service);
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static void remove_service(posix_signal_service* service);
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static void remove_service(posix_signal_service* service);
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intrusive_list<posix_signal> impl_list_;
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intrusive_list<posix_signal> impl_list_;
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// Per-signal registration table
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// Per-signal registration table
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signal_registration* registrations_[max_signal_number];
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signal_registration* registrations_[max_signal_number];
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// Registration counts for each signal
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// Registration counts for each signal
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std::size_t registration_count_[max_signal_number];
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std::size_t registration_count_[max_signal_number];
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// Linked list of all posix_signal_service services for signal delivery
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// Linked list of all posix_signal_service services for signal delivery
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posix_signal_service* next_ = nullptr;
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posix_signal_service* next_ = nullptr;
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posix_signal_service* prev_ = nullptr;
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posix_signal_service* prev_ = nullptr;
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/** Get or create the signal service for the given context.
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/** Get or create the signal service for the given context.
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This function is called by the concrete scheduler during initialization
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This function is called by the concrete scheduler during initialization
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to create the signal service with a reference to itself.
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to create the signal service with a reference to itself.
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@param ctx Reference to the owning execution_context.
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@param ctx Reference to the owning execution_context.
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@param sched Reference to the scheduler for posting completions.
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@param sched Reference to the scheduler for posting completions.
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@return Reference to the signal service.
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@return Reference to the signal service.
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217 |
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| 218 |
|
get_signal_service(capy::execution_context& ctx, scheduler& sched);
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get_signal_service(capy::execution_context& ctx, scheduler& sched);
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} // namespace boost::corosio
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} // namespace boost::corosio
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// ---------------------------------------------------------------------------
|
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// ---------------------------------------------------------------------------
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// ---------------------------------------------------------------------------
|
226 |
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// ---------------------------------------------------------------------------
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227 |
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| 228 |
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namespace boost::corosio {
|
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namespace boost::corosio {
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namespace posix_signal_detail {
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namespace posix_signal_detail {
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posix_signal_service* service_list = nullptr;
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posix_signal_service* service_list = nullptr;
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std::size_t registration_count[max_signal_number] = {};
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std::size_t registration_count[max_signal_number] = {};
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signal_set::flags_t registered_flags[max_signal_number] = {};
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signal_set::flags_t registered_flags[max_signal_number] = {};
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BOOST_COROSIO_DECL signal_state* get_signal_state();
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BOOST_COROSIO_DECL signal_state* get_signal_state();
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// Check if requested flags are supported on this platform.
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// Check if requested flags are supported on this platform.
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// Returns true if all flags are supported, false otherwise.
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// Returns true if all flags are supported, false otherwise.
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flags_supported([[maybe_unused]] signal_set::flags_t flags)
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flags_supported([[maybe_unused]] signal_set::flags_t flags)
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if (flags & signal_set::no_child_wait)
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if (flags & signal_set::no_child_wait)
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// Map abstract flags to sigaction() flags.
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// Map abstract flags to sigaction() flags.
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// Caller must ensure flags_supported() returns true first.
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// Caller must ensure flags_supported() returns true first.
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to_sigaction_flags(signal_set::flags_t flags)
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to_sigaction_flags(signal_set::flags_t flags)
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if (flags & signal_set::restart)
|
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if (flags & signal_set::restart)
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| 264 |
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if (flags & signal_set::no_child_stop)
|
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if (flags & signal_set::no_child_stop)
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sa_flags |= SA_NOCLDSTOP;
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sa_flags |= SA_NOCLDSTOP;
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| 267 |
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if (flags & signal_set::no_child_wait)
|
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if (flags & signal_set::no_child_wait)
|
| 268 |
|
sa_flags |= SA_NOCLDWAIT;
|
268 |
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sa_flags |= SA_NOCLDWAIT;
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| 269 |
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|
269 |
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if (flags & signal_set::no_defer)
|
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if (flags & signal_set::no_defer)
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|
271 |
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| 272 |
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if (flags & signal_set::reset_handler)
|
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if (flags & signal_set::reset_handler)
|
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sa_flags |= SA_RESETHAND;
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sa_flags |= SA_RESETHAND;
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|
274 |
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| 275 |
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275 |
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| 276 |
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|
276 |
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|
| 277 |
|
// Check if two flag values are compatible
|
277 |
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// Check if two flag values are compatible
|
| 278 |
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|
278 |
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|
| 279 |
|
flags_compatible(signal_set::flags_t existing, signal_set::flags_t requested)
|
279 |
|
flags_compatible(signal_set::flags_t existing, signal_set::flags_t requested)
|
| 280 |
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|
280 |
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|
| 281 |
|
// dont_care is always compatible
|
281 |
|
// dont_care is always compatible
|
| 282 |
|
if ((existing & signal_set::dont_care) ||
|
282 |
|
if ((existing & signal_set::dont_care) ||
|
| 283 |
|
(requested & signal_set::dont_care))
|
283 |
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(requested & signal_set::dont_care))
|
| 284 |
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|
284 |
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|
| 285 |
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|
285 |
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|
| 286 |
|
// Mask out dont_care bit for comparison
|
286 |
|
// Mask out dont_care bit for comparison
|
| 287 |
|
constexpr auto mask = ~signal_set::dont_care;
|
287 |
|
constexpr auto mask = ~signal_set::dont_care;
|
| 288 |
|
return (existing & mask) == (requested & mask);
|
288 |
|
return (existing & mask) == (requested & mask);
|
| 289 |
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|
289 |
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|
| 290 |
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|
290 |
|
|
| 291 |
|
// C signal handler - must be async-signal-safe
|
291 |
|
// C signal handler - must be async-signal-safe
|
| 292 |
|
|
292 |
|
|
| 293 |
|
corosio_posix_signal_handler(int signal_number)
|
293 |
|
corosio_posix_signal_handler(int signal_number)
|
| 294 |
|
|
294 |
|
|
| 295 |
|
posix_signal_service::deliver_signal(signal_number);
|
295 |
|
posix_signal_service::deliver_signal(signal_number);
|
| 296 |
|
// Note: With sigaction(), the handler persists automatically
|
296 |
|
// Note: With sigaction(), the handler persists automatically
|
| 297 |
|
// (unlike some signal() implementations that reset to SIG_DFL)
|
297 |
|
// (unlike some signal() implementations that reset to SIG_DFL)
|
| 298 |
|
|
298 |
|
|
| 299 |
|
|
299 |
|
|
| 300 |
|
} // namespace posix_signal_detail
|
300 |
|
} // namespace posix_signal_detail
|
| 301 |
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|
301 |
|
|
| 302 |
|
// signal_op implementation
|
302 |
|
// signal_op implementation
|
| 303 |
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|
303 |
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|
| 304 |
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|
304 |
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|
| 305 |
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|
305 |
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| 306 |
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306 |
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|
| 307 |
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|
307 |
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|
| 308 |
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|
308 |
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|
| 309 |
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|
309 |
|
|
| 310 |
|
*signal_out = signal_number;
|
310 |
|
*signal_out = signal_number;
|
| 311 |
|
|
311 |
|
|
| 312 |
|
// Capture svc before resuming (coro may destroy us)
|
312 |
|
// Capture svc before resuming (coro may destroy us)
|
| 313 |
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|
313 |
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|
| 314 |
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|
314 |
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|
| 315 |
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|
315 |
|
|
| 316 |
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|
316 |
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|
| 317 |
|
|
317 |
|
|
| 318 |
|
// Balance the work_started() from start_wait
|
318 |
|
// Balance the work_started() from start_wait
|
| 319 |
|
|
319 |
|
|
| 320 |
|
service->work_finished();
|
320 |
|
service->work_finished();
|
| 321 |
|
|
321 |
|
|
| 322 |
|
|
322 |
|
|
| 323 |
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|
323 |
|
|
| 324 |
|
|
324 |
|
|
| 325 |
|
|
325 |
|
|
| 326 |
|
// No-op: signal_op is embedded in posix_signal
|
326 |
|
// No-op: signal_op is embedded in posix_signal
|
| 327 |
|
|
327 |
|
|
| 328 |
|
|
328 |
|
|
| 329 |
|
// posix_signal implementation
|
329 |
|
// posix_signal implementation
|
| 330 |
|
|
330 |
|
|
| 331 |
|
inline posix_signal::posix_signal(posix_signal_service& svc) noexcept
|
331 |
|
inline posix_signal::posix_signal(posix_signal_service& svc) noexcept
|
| 332 |
|
|
332 |
|
|
| 333 |
|
|
333 |
|
|
| 334 |
|
|
334 |
|
|
| 335 |
|
|
335 |
|
|
| 336 |
|
inline std::coroutine_handle<>
|
336 |
|
inline std::coroutine_handle<>
|
| 337 |
|
|
337 |
|
|
| 338 |
|
std::coroutine_handle<> h,
|
338 |
|
std::coroutine_handle<> h,
|
| 339 |
|
|
339 |
|
|
| 340 |
|
|
340 |
|
|
| 341 |
|
|
341 |
|
|
| 342 |
|
|
342 |
|
|
| 343 |
|
|
343 |
|
|
| 344 |
|
|
344 |
|
|
| 345 |
|
|
345 |
|
|
| 346 |
|
|
346 |
|
|
| 347 |
|
pending_op_.signal_out = signal_out;
|
347 |
|
pending_op_.signal_out = signal_out;
|
| 348 |
|
pending_op_.signal_number = 0;
|
348 |
|
pending_op_.signal_number = 0;
|
| 349 |
|
|
349 |
|
|
| 350 |
|
if (token.stop_requested())
|
350 |
|
if (token.stop_requested())
|
| 351 |
|
|
351 |
|
|
| 352 |
|
|
352 |
|
|
| 353 |
|
*ec = make_error_code(capy::error::canceled);
|
353 |
|
*ec = make_error_code(capy::error::canceled);
|
| 354 |
|
|
354 |
|
|
| 355 |
|
|
355 |
|
|
| 356 |
|
|
356 |
|
|
| 357 |
|
// completion is always posted to scheduler queue, never inline.
|
357 |
|
// completion is always posted to scheduler queue, never inline.
|
| 358 |
|
return std::noop_coroutine();
|
358 |
|
return std::noop_coroutine();
|
| 359 |
|
|
359 |
|
|
| 360 |
|
|
360 |
|
|
| 361 |
|
svc_.start_wait(*this, &pending_op_);
|
361 |
|
svc_.start_wait(*this, &pending_op_);
|
| 362 |
|
// completion is always posted to scheduler queue, never inline.
|
362 |
|
// completion is always posted to scheduler queue, never inline.
|
| 363 |
|
return std::noop_coroutine();
|
363 |
|
return std::noop_coroutine();
|
| 364 |
|
|
364 |
|
|
| 365 |
|
|
365 |
|
|
| 366 |
|
|
366 |
|
|
| 367 |
|
posix_signal::add(int signal_number, signal_set::flags_t flags)
|
367 |
|
posix_signal::add(int signal_number, signal_set::flags_t flags)
|
| 368 |
|
|
368 |
|
|
| 369 |
|
return svc_.add_signal(*this, signal_number, flags);
|
369 |
|
return svc_.add_signal(*this, signal_number, flags);
|
| 370 |
|
|
370 |
|
|
| 371 |
|
|
371 |
|
|
| 372 |
|
|
372 |
|
|
| 373 |
|
posix_signal::remove(int signal_number)
|
373 |
|
posix_signal::remove(int signal_number)
|
| 374 |
|
|
374 |
|
|
| 375 |
|
return svc_.remove_signal(*this, signal_number);
|
375 |
|
return svc_.remove_signal(*this, signal_number);
|
| 376 |
|
|
376 |
|
|
| 377 |
|
|
377 |
|
|
| 378 |
|
|
378 |
|
|
| 379 |
|
|
379 |
|
|
| 380 |
|
|
380 |
|
|
| 381 |
|
return svc_.clear_signals(*this);
|
381 |
|
return svc_.clear_signals(*this);
|
| 382 |
|
|
382 |
|
|
| 383 |
|
|
383 |
|
|
| 384 |
|
|
384 |
|
|
| 385 |
|
|
385 |
|
|
| 386 |
|
|
386 |
|
|
| 387 |
|
|
387 |
|
|
| 388 |
|
|
388 |
|
|
| 389 |
|
|
389 |
|
|
| 390 |
|
// posix_signal_service implementation
|
390 |
|
// posix_signal_service implementation
|
| 391 |
|
|
391 |
|
|
| 392 |
|
inline posix_signal_service::posix_signal_service(
|
392 |
|
inline posix_signal_service::posix_signal_service(
|
| 393 |
|
capy::execution_context&, scheduler& sched)
|
393 |
|
capy::execution_context&, scheduler& sched)
|
| 394 |
|
|
394 |
|
|
| 395 |
|
|
395 |
|
|
| 396 |
|
for (int i = 0; i < max_signal_number; ++i)
|
396 |
|
for (int i = 0; i < max_signal_number; ++i)
|
| 397 |
|
|
397 |
|
|
| 398 |
|
registrations_[i] = nullptr;
|
398 |
|
registrations_[i] = nullptr;
|
| 399 |
|
registration_count_[i] = 0;
|
399 |
|
registration_count_[i] = 0;
|
| 400 |
|
|
400 |
|
|
| 401 |
|
|
401 |
|
|
| 402 |
|
|
402 |
|
|
| 403 |
|
|
403 |
|
|
| 404 |
|
inline posix_signal_service::~posix_signal_service()
|
404 |
|
inline posix_signal_service::~posix_signal_service()
|
| 405 |
|
|
405 |
|
|
| 406 |
|
|
406 |
|
|
| 407 |
|
|
407 |
|
|
| 408 |
|
|
408 |
|
|
| 409 |
|
|
409 |
|
|
| 410 |
|
posix_signal_service::shutdown()
|
410 |
|
posix_signal_service::shutdown()
|
| 411 |
|
|
411 |
|
|
| 412 |
|
std::lock_guard lock(mutex_);
|
412 |
|
std::lock_guard lock(mutex_);
|
| 413 |
|
|
413 |
|
|
| 414 |
|
for (auto* impl = impl_list_.pop_front(); impl != nullptr;
|
414 |
|
for (auto* impl = impl_list_.pop_front(); impl != nullptr;
|
| 415 |
|
impl = impl_list_.pop_front())
|
415 |
|
impl = impl_list_.pop_front())
|
| 416 |
|
|
416 |
|
|
| 417 |
|
while (auto* reg = impl->signals_)
|
417 |
|
while (auto* reg = impl->signals_)
|
| 418 |
|
|
418 |
|
|
| 419 |
|
impl->signals_ = reg->next_in_set;
|
419 |
|
impl->signals_ = reg->next_in_set;
|
| 420 |
|
|
420 |
|
|
| 421 |
|
|
421 |
|
|
| 422 |
|
|
422 |
|
|
| 423 |
|
|
423 |
|
|
| 424 |
|
|
424 |
|
|
| 425 |
|
|
425 |
|
|
| 426 |
|
inline io_object::implementation*
|
426 |
|
inline io_object::implementation*
|
| 427 |
|
posix_signal_service::construct()
|
427 |
|
posix_signal_service::construct()
|
| 428 |
|
|
428 |
|
|
| 429 |
|
auto* impl = new posix_signal(*this);
|
429 |
|
auto* impl = new posix_signal(*this);
|
| 430 |
|
|
430 |
|
|
| 431 |
|
|
431 |
|
|
| 432 |
|
std::lock_guard lock(mutex_);
|
432 |
|
std::lock_guard lock(mutex_);
|
| 433 |
|
impl_list_.push_back(impl);
|
433 |
|
impl_list_.push_back(impl);
|
| 434 |
|
|
434 |
|
|
| 435 |
|
|
435 |
|
|
| 436 |
|
|
436 |
|
|
| 437 |
|
|
437 |
|
|
| 438 |
|
|
438 |
|
|
| 439 |
|
|
439 |
|
|
| 440 |
|
posix_signal_service::destroy_impl(posix_signal& impl)
|
440 |
|
posix_signal_service::destroy_impl(posix_signal& impl)
|
| 441 |
|
|
441 |
|
|
| 442 |
|
|
442 |
|
|
| 443 |
|
std::lock_guard lock(mutex_);
|
443 |
|
std::lock_guard lock(mutex_);
|
| 444 |
|
impl_list_.remove(&impl);
|
444 |
|
impl_list_.remove(&impl);
|
| 445 |
|
|
445 |
|
|
| 446 |
|
|
446 |
|
|
| 447 |
|
|
447 |
|
|
| 448 |
|
|
448 |
|
|
| 449 |
|
|
449 |
|
|
| 450 |
|
|
450 |
|
|
| 451 |
|
posix_signal_service::add_signal(
|
451 |
|
posix_signal_service::add_signal(
|
| 452 |
|
posix_signal& impl, int signal_number, signal_set::flags_t flags)
|
452 |
|
posix_signal& impl, int signal_number, signal_set::flags_t flags)
|
| 453 |
|
|
453 |
|
|
| 454 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
454 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
| 455 |
|
return make_error_code(std::errc::invalid_argument);
|
455 |
|
return make_error_code(std::errc::invalid_argument);
|
| 456 |
|
|
456 |
|
|
| 457 |
|
// Validate that requested flags are supported on this platform
|
457 |
|
// Validate that requested flags are supported on this platform
|
| 458 |
|
// (e.g., SA_NOCLDWAIT may not be available on all POSIX systems)
|
458 |
|
// (e.g., SA_NOCLDWAIT may not be available on all POSIX systems)
|
| 459 |
|
if (!posix_signal_detail::flags_supported(flags))
|
459 |
|
if (!posix_signal_detail::flags_supported(flags))
|
| 460 |
|
return make_error_code(std::errc::operation_not_supported);
|
460 |
|
return make_error_code(std::errc::operation_not_supported);
|
| 461 |
|
|
461 |
|
|
| 462 |
|
posix_signal_detail::signal_state* state =
|
462 |
|
posix_signal_detail::signal_state* state =
|
| 463 |
|
posix_signal_detail::get_signal_state();
|
463 |
|
posix_signal_detail::get_signal_state();
|
| 464 |
|
std::lock_guard state_lock(state->mutex);
|
464 |
|
std::lock_guard state_lock(state->mutex);
|
| 465 |
|
std::lock_guard lock(mutex_);
|
465 |
|
std::lock_guard lock(mutex_);
|
| 466 |
|
|
466 |
|
|
| 467 |
|
// Find insertion point (list is sorted by signal number)
|
467 |
|
// Find insertion point (list is sorted by signal number)
|
| 468 |
|
signal_registration** insertion_point = &impl.signals_;
|
468 |
|
signal_registration** insertion_point = &impl.signals_;
|
| 469 |
|
signal_registration* reg = impl.signals_;
|
469 |
|
signal_registration* reg = impl.signals_;
|
| 470 |
|
while (reg && reg->signal_number < signal_number)
|
470 |
|
while (reg && reg->signal_number < signal_number)
|
| 471 |
|
|
471 |
|
|
| 472 |
|
insertion_point = ®->next_in_set;
|
472 |
|
insertion_point = ®->next_in_set;
|
| 473 |
|
|
473 |
|
|
| 474 |
|
|
474 |
|
|
| 475 |
|
|
475 |
|
|
| 476 |
|
// Already registered in this set - check flag compatibility
|
476 |
|
// Already registered in this set - check flag compatibility
|
| 477 |
|
// (same signal_set adding same signal twice with different flags)
|
477 |
|
// (same signal_set adding same signal twice with different flags)
|
| 478 |
|
if (reg && reg->signal_number == signal_number)
|
478 |
|
if (reg && reg->signal_number == signal_number)
|
| 479 |
|
|
479 |
|
|
| 480 |
|
if (!posix_signal_detail::flags_compatible(reg->flags, flags))
|
480 |
|
if (!posix_signal_detail::flags_compatible(reg->flags, flags))
|
| 481 |
|
return make_error_code(std::errc::invalid_argument);
|
481 |
|
return make_error_code(std::errc::invalid_argument);
|
| 482 |
|
|
482 |
|
|
| 483 |
|
|
483 |
|
|
| 484 |
|
|
484 |
|
|
| 485 |
|
// Check flag compatibility with global registration
|
485 |
|
// Check flag compatibility with global registration
|
| 486 |
|
// (different signal_set already registered this signal with different flags)
|
486 |
|
// (different signal_set already registered this signal with different flags)
|
| 487 |
|
if (state->registration_count[signal_number] > 0)
|
487 |
|
if (state->registration_count[signal_number] > 0)
|
| 488 |
|
|
488 |
|
|
| 489 |
|
if (!posix_signal_detail::flags_compatible(
|
489 |
|
if (!posix_signal_detail::flags_compatible(
|
| 490 |
|
state->registered_flags[signal_number], flags))
|
490 |
|
state->registered_flags[signal_number], flags))
|
| 491 |
|
return make_error_code(std::errc::invalid_argument);
|
491 |
|
return make_error_code(std::errc::invalid_argument);
|
| 492 |
|
|
492 |
|
|
| 493 |
|
|
493 |
|
|
| 494 |
|
auto* new_reg = new signal_registration;
|
494 |
|
auto* new_reg = new signal_registration;
|
| 495 |
|
new_reg->signal_number = signal_number;
|
495 |
|
new_reg->signal_number = signal_number;
|
| 496 |
|
|
496 |
|
|
| 497 |
|
|
497 |
|
|
| 498 |
|
new_reg->undelivered = 0;
|
498 |
|
new_reg->undelivered = 0;
|
| 499 |
|
|
499 |
|
|
| 500 |
|
// Install signal handler on first global registration
|
500 |
|
// Install signal handler on first global registration
|
| 501 |
|
if (state->registration_count[signal_number] == 0)
|
501 |
|
if (state->registration_count[signal_number] == 0)
|
| 502 |
|
|
502 |
|
|
| 503 |
|
struct sigaction sa = {};
|
503 |
|
struct sigaction sa = {};
|
| 504 |
|
sa.sa_handler = posix_signal_detail::corosio_posix_signal_handler;
|
504 |
|
sa.sa_handler = posix_signal_detail::corosio_posix_signal_handler;
|
| 505 |
|
sigemptyset(&sa.sa_mask);
|
505 |
|
sigemptyset(&sa.sa_mask);
|
| 506 |
|
sa.sa_flags = posix_signal_detail::to_sigaction_flags(flags);
|
506 |
|
sa.sa_flags = posix_signal_detail::to_sigaction_flags(flags);
|
| 507 |
|
|
507 |
|
|
| 508 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0)
|
508 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0)
|
| 509 |
|
|
509 |
|
|
| 510 |
|
|
510 |
|
|
| 511 |
|
return make_error_code(std::errc::invalid_argument);
|
511 |
|
return make_error_code(std::errc::invalid_argument);
|
| 512 |
|
|
512 |
|
|
| 513 |
|
|
513 |
|
|
| 514 |
|
// Store the flags used for first registration
|
514 |
|
// Store the flags used for first registration
|
| 515 |
|
state->registered_flags[signal_number] = flags;
|
515 |
|
state->registered_flags[signal_number] = flags;
|
| 516 |
|
|
516 |
|
|
| 517 |
|
|
517 |
|
|
| 518 |
|
new_reg->next_in_set = reg;
|
518 |
|
new_reg->next_in_set = reg;
|
| 519 |
|
*insertion_point = new_reg;
|
519 |
|
*insertion_point = new_reg;
|
| 520 |
|
|
520 |
|
|
| 521 |
|
new_reg->next_in_table = registrations_[signal_number];
|
521 |
|
new_reg->next_in_table = registrations_[signal_number];
|
| 522 |
|
new_reg->prev_in_table = nullptr;
|
522 |
|
new_reg->prev_in_table = nullptr;
|
| 523 |
|
if (registrations_[signal_number])
|
523 |
|
if (registrations_[signal_number])
|
| 524 |
|
registrations_[signal_number]->prev_in_table = new_reg;
|
524 |
|
registrations_[signal_number]->prev_in_table = new_reg;
|
| 525 |
|
registrations_[signal_number] = new_reg;
|
525 |
|
registrations_[signal_number] = new_reg;
|
| 526 |
|
|
526 |
|
|
| 527 |
|
++state->registration_count[signal_number];
|
527 |
|
++state->registration_count[signal_number];
|
| 528 |
|
++registration_count_[signal_number];
|
528 |
|
++registration_count_[signal_number];
|
| 529 |
|
|
529 |
|
|
| 530 |
|
|
530 |
|
|
| 531 |
|
|
531 |
|
|
| 532 |
|
|
532 |
|
|
| 533 |
|
|
533 |
|
|
| 534 |
|
posix_signal_service::remove_signal(posix_signal& impl, int signal_number)
|
534 |
|
posix_signal_service::remove_signal(posix_signal& impl, int signal_number)
|
| 535 |
|
|
535 |
|
|
| 536 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
536 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
| 537 |
|
return make_error_code(std::errc::invalid_argument);
|
537 |
|
return make_error_code(std::errc::invalid_argument);
|
| 538 |
|
|
538 |
|
|
| 539 |
|
posix_signal_detail::signal_state* state =
|
539 |
|
posix_signal_detail::signal_state* state =
|
| 540 |
|
posix_signal_detail::get_signal_state();
|
540 |
|
posix_signal_detail::get_signal_state();
|
| 541 |
|
std::lock_guard state_lock(state->mutex);
|
541 |
|
std::lock_guard state_lock(state->mutex);
|
| 542 |
|
std::lock_guard lock(mutex_);
|
542 |
|
std::lock_guard lock(mutex_);
|
| 543 |
|
|
543 |
|
|
| 544 |
|
signal_registration** deletion_point = &impl.signals_;
|
544 |
|
signal_registration** deletion_point = &impl.signals_;
|
| 545 |
|
signal_registration* reg = impl.signals_;
|
545 |
|
signal_registration* reg = impl.signals_;
|
| 546 |
|
while (reg && reg->signal_number < signal_number)
|
546 |
|
while (reg && reg->signal_number < signal_number)
|
| 547 |
|
|
547 |
|
|
| 548 |
|
deletion_point = ®->next_in_set;
|
548 |
|
deletion_point = ®->next_in_set;
|
| 549 |
|
|
549 |
|
|
| 550 |
|
|
550 |
|
|
| 551 |
|
|
551 |
|
|
| 552 |
|
if (!reg || reg->signal_number != signal_number)
|
552 |
|
if (!reg || reg->signal_number != signal_number)
|
| 553 |
|
|
553 |
|
|
| 554 |
|
|
554 |
|
|
| 555 |
|
// Restore default handler on last global unregistration
|
555 |
|
// Restore default handler on last global unregistration
|
| 556 |
|
if (state->registration_count[signal_number] == 1)
|
556 |
|
if (state->registration_count[signal_number] == 1)
|
| 557 |
|
|
557 |
|
|
| 558 |
|
struct sigaction sa = {};
|
558 |
|
struct sigaction sa = {};
|
| 559 |
|
|
559 |
|
|
| 560 |
|
sigemptyset(&sa.sa_mask);
|
560 |
|
sigemptyset(&sa.sa_mask);
|
| 561 |
|
|
561 |
|
|
| 562 |
|
|
562 |
|
|
| 563 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0)
|
563 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0)
|
| 564 |
|
return make_error_code(std::errc::invalid_argument);
|
564 |
|
return make_error_code(std::errc::invalid_argument);
|
| 565 |
|
|
565 |
|
|
| 566 |
|
|
566 |
|
|
| 567 |
|
state->registered_flags[signal_number] = signal_set::none;
|
567 |
|
state->registered_flags[signal_number] = signal_set::none;
|
| 568 |
|
|
568 |
|
|
| 569 |
|
|
569 |
|
|
| 570 |
|
*deletion_point = reg->next_in_set;
|
570 |
|
*deletion_point = reg->next_in_set;
|
| 571 |
|
|
571 |
|
|
| 572 |
|
if (registrations_[signal_number] == reg)
|
572 |
|
if (registrations_[signal_number] == reg)
|
| 573 |
|
registrations_[signal_number] = reg->next_in_table;
|
573 |
|
registrations_[signal_number] = reg->next_in_table;
|
| 574 |
|
|
574 |
|
|
| 575 |
|
reg->prev_in_table->next_in_table = reg->next_in_table;
|
575 |
|
reg->prev_in_table->next_in_table = reg->next_in_table;
|
| 576 |
|
|
576 |
|
|
| 577 |
|
reg->next_in_table->prev_in_table = reg->prev_in_table;
|
577 |
|
reg->next_in_table->prev_in_table = reg->prev_in_table;
|
| 578 |
|
|
578 |
|
|
| 579 |
|
--state->registration_count[signal_number];
|
579 |
|
--state->registration_count[signal_number];
|
| 580 |
|
--registration_count_[signal_number];
|
580 |
|
--registration_count_[signal_number];
|
| 581 |
|
|
581 |
|
|
| 582 |
|
|
582 |
|
|
| 583 |
|
|
583 |
|
|
| 584 |
|
|
584 |
|
|
| 585 |
|
|
585 |
|
|
| 586 |
|
|
586 |
|
|
| 587 |
|
posix_signal_service::clear_signals(posix_signal& impl)
|
587 |
|
posix_signal_service::clear_signals(posix_signal& impl)
|
| 588 |
|
|
588 |
|
|
| 589 |
|
posix_signal_detail::signal_state* state =
|
589 |
|
posix_signal_detail::signal_state* state =
|
| 590 |
|
posix_signal_detail::get_signal_state();
|
590 |
|
posix_signal_detail::get_signal_state();
|
| 591 |
|
std::lock_guard state_lock(state->mutex);
|
591 |
|
std::lock_guard state_lock(state->mutex);
|
| 592 |
|
std::lock_guard lock(mutex_);
|
592 |
|
std::lock_guard lock(mutex_);
|
| 593 |
|
|
593 |
|
|
| 594 |
|
std::error_code first_error;
|
594 |
|
std::error_code first_error;
|
| 595 |
|
|
595 |
|
|
| 596 |
|
while (signal_registration* reg = impl.signals_)
|
596 |
|
while (signal_registration* reg = impl.signals_)
|
| 597 |
|
|
597 |
|
|
| 598 |
|
int signal_number = reg->signal_number;
|
598 |
|
int signal_number = reg->signal_number;
|
| 599 |
|
|
599 |
|
|
| 600 |
|
if (state->registration_count[signal_number] == 1)
|
600 |
|
if (state->registration_count[signal_number] == 1)
|
| 601 |
|
|
601 |
|
|
| 602 |
|
struct sigaction sa = {};
|
602 |
|
struct sigaction sa = {};
|
| 603 |
|
|
603 |
|
|
| 604 |
|
sigemptyset(&sa.sa_mask);
|
604 |
|
sigemptyset(&sa.sa_mask);
|
| 605 |
|
|
605 |
|
|
| 606 |
|
|
606 |
|
|
| 607 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0 && !first_error)
|
607 |
|
if (::sigaction(signal_number, &sa, nullptr) < 0 && !first_error)
|
| 608 |
|
first_error = make_error_code(std::errc::invalid_argument);
|
608 |
|
first_error = make_error_code(std::errc::invalid_argument);
|
| 609 |
|
|
609 |
|
|
| 610 |
|
|
610 |
|
|
| 611 |
|
state->registered_flags[signal_number] = signal_set::none;
|
611 |
|
state->registered_flags[signal_number] = signal_set::none;
|
| 612 |
|
|
612 |
|
|
| 613 |
|
|
613 |
|
|
| 614 |
|
impl.signals_ = reg->next_in_set;
|
614 |
|
impl.signals_ = reg->next_in_set;
|
| 615 |
|
|
615 |
|
|
| 616 |
|
if (registrations_[signal_number] == reg)
|
616 |
|
if (registrations_[signal_number] == reg)
|
| 617 |
|
registrations_[signal_number] = reg->next_in_table;
|
617 |
|
registrations_[signal_number] = reg->next_in_table;
|
| 618 |
|
|
618 |
|
|
| 619 |
|
reg->prev_in_table->next_in_table = reg->next_in_table;
|
619 |
|
reg->prev_in_table->next_in_table = reg->next_in_table;
|
| 620 |
|
|
620 |
|
|
| 621 |
|
reg->next_in_table->prev_in_table = reg->prev_in_table;
|
621 |
|
reg->next_in_table->prev_in_table = reg->prev_in_table;
|
| 622 |
|
|
622 |
|
|
| 623 |
|
--state->registration_count[signal_number];
|
623 |
|
--state->registration_count[signal_number];
|
| 624 |
|
--registration_count_[signal_number];
|
624 |
|
--registration_count_[signal_number];
|
| 625 |
|
|
625 |
|
|
| 626 |
|
|
626 |
|
|
| 627 |
|
|
627 |
|
|
| 628 |
|
|
628 |
|
|
| 629 |
|
|
629 |
|
|
| 630 |
|
|
630 |
|
|
| 631 |
|
|
631 |
|
|
| 632 |
|
|
632 |
|
|
| 633 |
|
|
633 |
|
|
| 634 |
|
|
634 |
|
|
| 635 |
|
posix_signal_service::cancel_wait(posix_signal& impl)
|
635 |
|
posix_signal_service::cancel_wait(posix_signal& impl)
|
| 636 |
|
|
636 |
|
|
| 637 |
|
bool was_waiting = false;
|
637 |
|
bool was_waiting = false;
|
| 638 |
|
|
638 |
|
|
| 639 |
|
|
639 |
|
|
| 640 |
|
|
640 |
|
|
| 641 |
|
std::lock_guard lock(mutex_);
|
641 |
|
std::lock_guard lock(mutex_);
|
| 642 |
|
|
642 |
|
|
| 643 |
|
|
643 |
|
|
| 644 |
|
|
644 |
|
|
| 645 |
|
|
645 |
|
|
| 646 |
|
|
646 |
|
|
| 647 |
|
|
647 |
|
|
| 648 |
|
|
648 |
|
|
| 649 |
|
|
649 |
|
|
| 650 |
|
|
650 |
|
|
| 651 |
|
|
651 |
|
|
| 652 |
|
|
652 |
|
|
| 653 |
|
*op->ec_out = make_error_code(capy::error::canceled);
|
653 |
|
*op->ec_out = make_error_code(capy::error::canceled);
|
| 654 |
|
|
654 |
|
|
| 655 |
|
|
655 |
|
|
| 656 |
|
|
656 |
|
|
| 657 |
|
|
657 |
|
|
| 658 |
|
|
658 |
|
|
| 659 |
|
|
659 |
|
|
| 660 |
|
|
660 |
|
|
| 661 |
|
|
661 |
|
|
| 662 |
|
posix_signal_service::start_wait(posix_signal& impl, signal_op* op)
|
662 |
|
posix_signal_service::start_wait(posix_signal& impl, signal_op* op)
|
| 663 |
|
|
663 |
|
|
| 664 |
|
|
664 |
|
|
| 665 |
|
std::lock_guard lock(mutex_);
|
665 |
|
std::lock_guard lock(mutex_);
|
| 666 |
|
|
666 |
|
|
| 667 |
|
// Check for queued signals first (signal arrived before wait started)
|
667 |
|
// Check for queued signals first (signal arrived before wait started)
|
| 668 |
|
signal_registration* reg = impl.signals_;
|
668 |
|
signal_registration* reg = impl.signals_;
|
| 669 |
|
|
669 |
|
|
| 670 |
|
|
670 |
|
|
| 671 |
|
if (reg->undelivered > 0)
|
671 |
|
if (reg->undelivered > 0)
|
| 672 |
|
|
672 |
|
|
| 673 |
|
|
673 |
|
|
| 674 |
|
op->signal_number = reg->signal_number;
|
674 |
|
op->signal_number = reg->signal_number;
|
| 675 |
|
// svc=nullptr: no work_finished needed since we never called work_started
|
675 |
|
// svc=nullptr: no work_finished needed since we never called work_started
|
| 676 |
|
|
676 |
|
|
| 677 |
|
|
677 |
|
|
| 678 |
|
|
678 |
|
|
| 679 |
|
|
679 |
|
|
| 680 |
|
|
680 |
|
|
| 681 |
|
|
681 |
|
|
| 682 |
|
|
682 |
|
|
| 683 |
|
// No queued signals - wait for delivery
|
683 |
|
// No queued signals - wait for delivery
|
| 684 |
|
|
684 |
|
|
| 685 |
|
// svc=this: signal_op::operator() will call work_finished() to balance this
|
685 |
|
// svc=this: signal_op::operator() will call work_finished() to balance this
|
| 686 |
|
|
686 |
|
|
| 687 |
|
|
687 |
|
|
| 688 |
|
|
688 |
|
|
| 689 |
|
|
689 |
|
|
| 690 |
|
|
690 |
|
|
| 691 |
|
|
691 |
|
|
| 692 |
|
posix_signal_service::deliver_signal(int signal_number)
|
692 |
|
posix_signal_service::deliver_signal(int signal_number)
|
| 693 |
|
|
693 |
|
|
| 694 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
694 |
|
if (signal_number < 0 || signal_number >= max_signal_number)
|
| 695 |
|
|
695 |
|
|
| 696 |
|
|
696 |
|
|
| 697 |
|
posix_signal_detail::signal_state* state =
|
697 |
|
posix_signal_detail::signal_state* state =
|
| 698 |
|
posix_signal_detail::get_signal_state();
|
698 |
|
posix_signal_detail::get_signal_state();
|
| 699 |
|
std::lock_guard lock(state->mutex);
|
699 |
|
std::lock_guard lock(state->mutex);
|
| 700 |
|
|
700 |
|
|
| 701 |
|
posix_signal_service* service = state->service_list;
|
701 |
|
posix_signal_service* service = state->service_list;
|
| 702 |
|
|
702 |
|
|
| 703 |
|
|
703 |
|
|
| 704 |
|
std::lock_guard svc_lock(service->mutex_);
|
704 |
|
std::lock_guard svc_lock(service->mutex_);
|
| 705 |
|
|
705 |
|
|
| 706 |
|
signal_registration* reg = service->registrations_[signal_number];
|
706 |
|
signal_registration* reg = service->registrations_[signal_number];
|
| 707 |
|
|
707 |
|
|
| 708 |
|
|
708 |
|
|
| 709 |
|
posix_signal* impl = static_cast<posix_signal*>(reg->owner);
|
709 |
|
posix_signal* impl = static_cast<posix_signal*>(reg->owner);
|
| 710 |
|
|
710 |
|
|
| 711 |
|
|
711 |
|
|
| 712 |
|
|
712 |
|
|
| 713 |
|
|
713 |
|
|
| 714 |
|
impl->pending_op_.signal_number = signal_number;
|
714 |
|
impl->pending_op_.signal_number = signal_number;
|
| 715 |
|
service->post(&impl->pending_op_);
|
715 |
|
service->post(&impl->pending_op_);
|
| 716 |
|
|
716 |
|
|
| 717 |
|
|
717 |
|
|
| 718 |
|
|
718 |
|
|
| 719 |
|
|
719 |
|
|
| 720 |
|
|
720 |
|
|
| 721 |
|
|
721 |
|
|
| 722 |
|
reg = reg->next_in_table;
|
722 |
|
reg = reg->next_in_table;
|
| 723 |
|
|
723 |
|
|
| 724 |
|
|
724 |
|
|
| 725 |
|
service = service->next_;
|
725 |
|
service = service->next_;
|
| 726 |
|
|
726 |
|
|
| 727 |
|
|
727 |
|
|
| 728 |
|
|
728 |
|
|
| 729 |
|
|
729 |
|
|
| 730 |
|
posix_signal_service::work_started() noexcept
|
730 |
|
posix_signal_service::work_started() noexcept
|
| 731 |
|
|
731 |
|
|
| 732 |
|
|
732 |
|
|
| 733 |
|
|
733 |
|
|
| 734 |
|
|
734 |
|
|
| 735 |
|
|
735 |
|
|
| 736 |
|
posix_signal_service::work_finished() noexcept
|
736 |
|
posix_signal_service::work_finished() noexcept
|
| 737 |
|
|
737 |
|
|
| 738 |
|
|
738 |
|
|
| 739 |
|
|
739 |
|
|
| 740 |
|
|
740 |
|
|
| 741 |
|
|
741 |
|
|
| 742 |
|
posix_signal_service::post(signal_op* op)
|
742 |
|
posix_signal_service::post(signal_op* op)
|
| 743 |
|
|
743 |
|
|
| 744 |
|
|
744 |
|
|
| 745 |
|
|
745 |
|
|
| 746 |
|
|
746 |
|
|
| 747 |
|
|
747 |
|
|
| 748 |
|
posix_signal_service::add_service(posix_signal_service* service)
|
748 |
|
posix_signal_service::add_service(posix_signal_service* service)
|
| 749 |
|
|
749 |
|
|
| 750 |
|
posix_signal_detail::signal_state* state =
|
750 |
|
posix_signal_detail::signal_state* state =
|
| 751 |
|
posix_signal_detail::get_signal_state();
|
751 |
|
posix_signal_detail::get_signal_state();
|
| 752 |
|
std::lock_guard lock(state->mutex);
|
752 |
|
std::lock_guard lock(state->mutex);
|
| 753 |
|
|
753 |
|
|
| 754 |
|
service->next_ = state->service_list;
|
754 |
|
service->next_ = state->service_list;
|
| 755 |
|
service->prev_ = nullptr;
|
755 |
|
service->prev_ = nullptr;
|
| 756 |
|
|
756 |
|
|
| 757 |
|
state->service_list->prev_ = service;
|
757 |
|
state->service_list->prev_ = service;
|
| 758 |
|
state->service_list = service;
|
758 |
|
state->service_list = service;
|
| 759 |
|
|
759 |
|
|
| 760 |
|
|
760 |
|
|
| 761 |
|
|
761 |
|
|
| 762 |
|
posix_signal_service::remove_service(posix_signal_service* service)
|
762 |
|
posix_signal_service::remove_service(posix_signal_service* service)
|
| 763 |
|
|
763 |
|
|
| 764 |
|
posix_signal_detail::signal_state* state =
|
764 |
|
posix_signal_detail::signal_state* state =
|
| 765 |
|
posix_signal_detail::get_signal_state();
|
765 |
|
posix_signal_detail::get_signal_state();
|
| 766 |
|
std::lock_guard lock(state->mutex);
|
766 |
|
std::lock_guard lock(state->mutex);
|
| 767 |
|
|
767 |
|
|
| 768 |
|
if (service->next_ || service->prev_ || state->service_list == service)
|
768 |
|
if (service->next_ || service->prev_ || state->service_list == service)
|
| 769 |
|
|
769 |
|
|
| 770 |
|
if (state->service_list == service)
|
770 |
|
if (state->service_list == service)
|
| 771 |
|
state->service_list = service->next_;
|
771 |
|
state->service_list = service->next_;
|
| 772 |
|
|
772 |
|
|
| 773 |
|
service->prev_->next_ = service->next_;
|
773 |
|
service->prev_->next_ = service->next_;
|
| 774 |
|
|
774 |
|
|
| 775 |
|
service->next_->prev_ = service->prev_;
|
775 |
|
service->next_->prev_ = service->prev_;
|
| 776 |
|
service->next_ = nullptr;
|
776 |
|
service->next_ = nullptr;
|
| 777 |
|
service->prev_ = nullptr;
|
777 |
|
service->prev_ = nullptr;
|
| 778 |
|
|
778 |
|
|
| 779 |
|
|
779 |
|
|
| 780 |
|
|
780 |
|
|
| 781 |
|
// get_signal_service - factory function
|
781 |
|
// get_signal_service - factory function
|
| 782 |
|
|
782 |
|
|
| 783 |
|
inline posix_signal_service&
|
783 |
|
inline posix_signal_service&
|
| 784 |
|
get_signal_service(capy::execution_context& ctx, scheduler& sched)
|
784 |
|
get_signal_service(capy::execution_context& ctx, scheduler& sched)
|
| 785 |
|
|
785 |
|
|
| 786 |
|
return ctx.make_service<posix_signal_service>(sched);
|
786 |
|
return ctx.make_service<posix_signal_service>(sched);
|
| 787 |
|
|
787 |
|
|
| 788 |
|
|
788 |
|
|
| 789 |
|
|
789 |
|
|
| 790 |
|
} // namespace boost::corosio
|
790 |
|
} // namespace boost::corosio
|
| 791 |
|
|
791 |
|
|
| 792 |
|
#endif // BOOST_COROSIO_POSIX
|
792 |
|
#endif // BOOST_COROSIO_POSIX
|
| 793 |
|
|
793 |
|
|
| 794 |
|
#endif // BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
|
794 |
|
#endif // BOOST_COROSIO_NATIVE_DETAIL_POSIX_POSIX_SIGNAL_SERVICE_HPP
|