diff options
Diffstat (limited to 'mit-pthreads/stdlib/exit.c')
| -rw-r--r-- | mit-pthreads/stdlib/exit.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/mit-pthreads/stdlib/exit.c b/mit-pthreads/stdlib/exit.c new file mode 100644 index 00000000000..159a066d797 --- /dev/null +++ b/mit-pthreads/stdlib/exit.c @@ -0,0 +1,89 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)exit.c 5.4 (Berkeley) 2/23/91";*/ +static char *rcsid = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <stddef.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/cdefs.h> +#include <pthread/posix.h> +#include "atexit.h" + +void (*__cleanup)(); + +/* + * Exit, flushing stdio buffers if necessary. + */ +void __NORETURN exit(int status) +{ + register struct atexit *p; + register int n; + + for (p = __atexit; p; p = p->next) + for (n = p->ind; --n >= 0;) + (*p->fns[n])(); + if (__cleanup) + (*__cleanup)(); + _exit(status); + + /* This is to shut up gcc, which complains about this function + * returning even if _exit() is declared noreturn. */ + while (1); +} + + +/* + * Register a function to be performed at exit. + */ +int atexit(void (*fn)()) +{ + static struct atexit __atexit0; /* one guaranteed table */ + register struct atexit *p; + + if ((p = __atexit) == NULL) + __atexit = p = &__atexit0; + else if (p->ind >= ATEXIT_SIZE) { + if ((p = malloc(sizeof(*p))) == NULL) + return (-1); + p->ind = 0; + p->next = __atexit; + __atexit = p; + } + p->fns[p->ind++] = fn; + return (0); +} |