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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* Run a function on the main thread
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Copyright (C) 2019-2021 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 <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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#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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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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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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