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2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
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* Copyright (c) 2011, 2012, 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* stdlib/exit.c
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* Terminates the current process.
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*/
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#include <dirent.h>
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#include <DIR.h>
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#include <FILE.h>
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#include <pthread.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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struct exit_handler* __exit_handler_stack = NULL;
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static pthread_mutex_t exit_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
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static bool currently_exiting = false;
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static FILE* volatile dummy_file = NULL; // volatile due to constant folding bug
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weak_alias(dummy_file, __stdin_used);
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weak_alias(dummy_file, __stdout_used);
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DIR* __first_dir = NULL;
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pthread_mutex_t __first_dir_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
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FILE* __first_file = NULL;
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pthread_mutex_t __first_file_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
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static void exit_file(FILE* fp)
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{
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if ( !fp )
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return;
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flockfile(fp);
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if ( fp->fflush_indirect )
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fp->fflush_indirect(fp);
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if ( fp->close_func )
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fp->close_func(fp->user);
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}
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void exit(int status)
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{
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// It's undefined behavior to call this function more than once: If more
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// than one thread calls the function we'll wait until the process dies.
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pthread_mutex_lock(&exit_lock);
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// It's undefined behavior to call this function more than once: If a
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// cleanup function calls this function we'll self-destruct immediately.
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if ( currently_exiting )
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_exit(status);
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currently_exiting = true;
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while ( __exit_handler_stack )
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{
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__exit_handler_stack->hook(status, __exit_handler_stack->param);
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__exit_handler_stack = __exit_handler_stack->next;
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}
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pthread_mutex_lock(&__first_file_lock);
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exit_file(__stdin_used);
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exit_file(__stdout_used);
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for ( FILE* fp = __first_file; fp; fp = fp->next )
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exit_file(fp);
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_exit(status);
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}
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