Mike Brady
83ae1d286b
If cleanup isn’t finished after one second, exit will occur unconditionally. Use the new exit handler for normal exit, for SIGINT and SIGTERM handling, for abnormal exit after fatal errors, and for handling quit requests from the D-Bus and MPRIS interfaces. When an unfixable error occurs without an installed unfixable error handler, unlock the mutex protecting Shairport Sync’s alsa backend to permit a clean exit. Fix a very low-level mutex-locking error that interfered with debugging. Simplify much mutex lock handling. Remove lots of old and unused code, variables and definitions. Update audio_sndio.c to remove some harmless compiler warnings. Undo adding two seconds for messages to be output before _Exit() on die() to allow messages to be output... Undo making die() exit unconditionally.
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*
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MIT License
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Copyright (c) 2023--2026 Mike Brady 4265913+mikebrady@users.noreply.github.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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// exit_init() starts a thread what waits for the exit_request_flag to
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// be set to non-zero.
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// It then runs the standard exit(exit_status) to
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// terminate the program, running all the atexit handlers first.
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// exit_request() can be called from anywhere in the program
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// including a SIG handler and
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// the thread will take care of terminating the program cleanly.
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// pass in EXIT_SUCCESS or EXIT_FAILURE in the request.
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#include <signal.h> // for sig_atomic_t
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#include <stdlib.h> // for EXIT_SUCCESS
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#include <string.h> // for memset
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#include <unistd.h> // for usleep
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#include <pthread.h>
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#include "exit.h"
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#include "common.h"
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volatile sig_atomic_t exit_request_flag = 0;
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volatile sig_atomic_t exit_status = EXIT_SUCCESS;
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pthread_t exit_manager_thread;
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void *exit_manager(__attribute__((unused)) void *arg) {
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while(exit_request_flag == 0) {
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usleep(100000);
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}
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exit(exit_status);
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return NULL;
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}
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void exit_init() {
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memset(&exit_manager_thread, 0, sizeof(pthread_t));
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named_pthread_create(&exit_manager_thread, NULL, &exit_manager, NULL, "exit_manager");
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}
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void exit_request(const int exit_status_requested) {
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exit_status = exit_status_requested; // EXIT_SUCCESS or EXIT_FAILURE
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exit_request_flag = 1; // ask for exit
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} |