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sortix--sortix/libc/on_exit.cpp
2013-12-17 14:30:23 +01:00

62 lines
1.8 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 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/>.
on_exit.cpp
Hooks that is called upon process exit.
*******************************************************************************/
#include <stdlib.h>
struct exithandler
{
void (*hook)(int, void*);
void* param;
struct exithandler* next;
}* exit_handler_stack = NULL;
extern "C" int on_exit(void (*hook)(int, void*), void* param)
{
struct exithandler* handler = (struct exithandler*) malloc(sizeof(struct exithandler));
if ( !handler ) { return -1; }
handler->hook = hook;
handler->param = param;
handler->next = exit_handler_stack;
exit_handler_stack = handler;
return 0;
}
static void atexit_adapter(int /*status*/, void* user)
{
((void (*)(void)) user)();
}
extern "C" int atexit(void (*hook)(void))
{
return on_exit(atexit_adapter, (void*) hook);
}
extern "C" void call_exit_handlers(int status)
{
while ( exit_handler_stack )
{
exit_handler_stack->hook(status, exit_handler_stack->param);
exit_handler_stack = exit_handler_stack->next;
}
}