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/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright © 2021 Keith Packard
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define _DEFAULT_SOURCE
#include <stdlib.h>
#include <string.h>
#include <sys/lock.h>
#include <limits.h>
#include "local-onexit.h"
#ifdef ENABLE_PICOLIBC_EXIT
struct on_exit {
union on_exit_func func;
void *arg;
enum pico_onexit_kind kind;
};
static struct on_exit on_exits[ATEXIT_MAX];
int
_on_exit(enum pico_onexit_kind kind, union on_exit_func func, void *arg)
{
int ret = -1;
int o;
__LIBC_LOCK();
for (o = 0; o < ATEXIT_MAX; o++) {
if (on_exits[o].kind == PICO_ONEXIT_EMPTY) {
on_exits[o].func = func;
on_exits[o].arg = arg;
on_exits[o].kind = kind;
ret = 0;
break;
}
}
__LIBC_UNLOCK();
return ret;
}
/*
* _call_exitprocs is in the same file as _on_exit so that the destructor
* will be included when any _on_exit function is used.
*/
#ifdef __INIT_FINI_ARRAY
static void
__call_exitprocs(void)
#define code 0
#define param 0
#else
void
__call_exitprocs(int code, void *param)
#endif
{
(void)param;
for (;;) {
int i;
union on_exit_func func = { 0 };
enum pico_onexit_kind kind = PICO_ONEXIT_EMPTY;
void *arg = 0;
__LIBC_LOCK();
for (i = ATEXIT_MAX - 1; i >= 0; i--) {
kind = on_exits[i].kind;
if (kind != PICO_ONEXIT_EMPTY) {
func = on_exits[i].func;
arg = on_exits[i].arg;
memset(&on_exits[i], '\0', sizeof(struct on_exit));
break;
}
}
__LIBC_UNLOCK();
switch (kind) {
case PICO_ONEXIT_EMPTY:
return;
case PICO_ONEXIT_ONEXIT:
func.on_exit(code, arg);
break;
case PICO_ONEXIT_ATEXIT:
func.atexit();
break;
case PICO_ONEXIT_CXA_ATEXIT:
func.cxa_atexit(arg);
break;
}
}
}
#ifdef __INIT_FINI_ARRAY
static const void *__call_exitprocs_ref __section(".fini_array_onexit") __used = __call_exitprocs;
#endif
#endif
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