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sortix--sortix/libc/stdlib/exit.cpp
Jonas 'Sortie' Termansen 30cd318c17 Implement signals.
Note: This is an incompatible ABI change.
2014-07-22 13:25:39 +02:00

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1.9 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
stdlib/exit.cpp
Terminates the current process.
*******************************************************************************/
#include <dirent.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
extern "C" { struct exit_handler* __exit_handler_stack = NULL; }
static pthread_mutex_t exit_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
static bool currently_exiting = false;
extern "C" void exit(int status)
{
// It's undefined behavior to call this function more than once: If more
// than one thread calls the function we'll wait until the process dies.
pthread_mutex_lock(&exit_lock);
// It's undefined behavior to call this function more than once: If a
// cleanup function calls this function we'll self-destruct immediately.
if ( currently_exiting )
_Exit(status);
currently_exiting = true;
while ( __exit_handler_stack )
{
__exit_handler_stack->hook(status, __exit_handler_stack->param);
__exit_handler_stack = __exit_handler_stack->next;
}
dcloseall();
fcloseall();
_Exit(status);
}