/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk> * This file is part of the Linux-8086 C library and is distributed * under the GNU Library General Public License. */ /* * Dec 2000 Manuel Novoa III * * Made atexit handling conform to standards... i.e. no args. * Removed on_exit since it did not match gnu libc definition. * Combined atexit and __do_exit into one object file. * * Feb 2000 Manuel Novoa III * * Reworked file after addition of __uClibc_main. * Changed name of __do_exit to atexit_handler. * Changed name of __cleanup to __uClibc_cleanup. * Moved declaration of __uClibc_cleanup to __uClibc_main * where it is initialized with (possibly weak alias) * __stdio_close_all. */ #include <stdlib.h> #include <errno.h> typedef void (*vfuncp) (void); extern vfuncp __uClibc_cleanup; #ifdef L_atexit extern void __stdio_close_all(void); static vfuncp __atexit_table[__UCLIBC_MAX_ATEXIT]; static int __atexit_count = 0; static void atexit_handler(void) { int count; /* * Guard against more functions being added and againt being reinvoked. */ __uClibc_cleanup = 0; /* In reverse order */ for (count = __atexit_count ; count-- ; ) { (*__atexit_table[count])(); } __stdio_close_all(); } int atexit(vfuncp ptr) { if ((__uClibc_cleanup == 0) || (__atexit_count >= __UCLIBC_MAX_ATEXIT)) { __set_errno(ENOMEM); return -1; } if (ptr) { __uClibc_cleanup = atexit_handler; __atexit_table[__atexit_count++] = ptr; } return 0; } #endif #ifdef L_exit void exit(int rv) { if (__uClibc_cleanup) { /* Not already executing __uClibc_cleanup. */ __uClibc_cleanup(); } _exit(rv); } #endif