mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-06 12:09:26 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/* Run a function on the main thread
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Copyright (C) 2019-2024 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "run-on-main-thread.h"
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#include "ser-event.h"
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#if CXX_STD_THREAD
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#include <thread>
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#include <mutex>
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#endif
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#include "gdbsupport/event-loop.h"
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/* The serial event used when posting runnables. */
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static struct serial_event *runnable_event;
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/* Runnables that have been posted. */
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static std::vector<std::function<void ()>> runnables;
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#if CXX_STD_THREAD
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/* Mutex to hold when handling RUNNABLE_EVENT or RUNNABLES. */
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static std::mutex runnable_mutex;
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/* The main thread's thread id. */
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static std::thread::id main_thread_id;
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#endif
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/* Run all the queued runnables. */
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static void
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run_events (int error, gdb_client_data client_data)
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{
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std::vector<std::function<void ()>> local;
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/* Hold the lock while changing the globals, but not while running
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the runnables. */
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{
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#if CXX_STD_THREAD
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std::lock_guard<std::mutex> lock (runnable_mutex);
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#endif
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/* Clear the event fd. Do this before flushing the events list,
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so that any new event post afterwards is sure to re-awaken the
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event loop. */
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serial_event_clear (runnable_event);
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/* Move the vector in case running a runnable pushes a new
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runnable. */
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local = std::move (runnables);
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}
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for (auto &item : local)
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{
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try
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{
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item ();
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}
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catch (...)
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{
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/* Ignore exceptions in the callback. */
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}
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}
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}
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/* See run-on-main-thread.h. */
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void
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run_on_main_thread (std::function<void ()> &&func)
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{
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#if CXX_STD_THREAD
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std::lock_guard<std::mutex> lock (runnable_mutex);
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#endif
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runnables.emplace_back (std::move (func));
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serial_event_set (runnable_event);
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}
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#if CXX_STD_THREAD
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static bool main_thread_id_initialized = false;
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#endif
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/* See run-on-main-thread.h. */
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bool
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is_main_thread ()
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{
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#if CXX_STD_THREAD
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/* Initialize main_thread_id on first use of is_main_thread. */
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if (!main_thread_id_initialized)
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{
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main_thread_id_initialized = true;
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main_thread_id = std::this_thread::get_id ();
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}
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return std::this_thread::get_id () == main_thread_id;
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#else
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return true;
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#endif
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}
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void _initialize_run_on_main_thread ();
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void
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_initialize_run_on_main_thread ()
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{
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#if CXX_STD_THREAD
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/* The variable main_thread_id should be initialized when entering main, or
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at an earlier use, so it should already be initialized here. */
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gdb_assert (main_thread_id_initialized);
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/* Assume that we execute this in the main thread. */
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gdb_assert (is_main_thread ());
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#endif
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runnable_event = make_serial_event ();
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add_file_handler (serial_event_fd (runnable_event), run_events, nullptr,
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"run-on-main-thread");
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}
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