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Diffstat (limited to 'newlib/libc/stdlib/on_exit.c')
-rw-r--r-- | newlib/libc/stdlib/on_exit.c | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/newlib/libc/stdlib/on_exit.c b/newlib/libc/stdlib/on_exit.c deleted file mode 100644 index f3383501f..000000000 --- a/newlib/libc/stdlib/on_exit.c +++ /dev/null @@ -1,107 +0,0 @@ -/* - * Copyright (c) 1990 Regents of the University of California. - * All rights reserved. - * - * %sccs.include.redist.c% - * - * This function is a modified version of atexit.c - */ - -/* -FUNCTION -<<on_exit>>---request execution of function with argument at program exit - -INDEX - on_exit - -ANSI_SYNOPSIS - #include <stdlib.h> - int on_exit (void (*<[function]>)(int, void *), void *<[arg]>); - -TRAD_SYNOPSIS - #include <stdlib.h> - int on_exit ((<[function]>, <[arg]>) - void (*<[function]>)(int, void *); - void *<[arg]>; - -DESCRIPTION -You can use <<on_exit>> to enroll functions in a list of functions that -will be called when your program terminates normally. The argument is -a pointer to a user-defined function which takes two arguments. The -first is the status code passed to exit and the second argument is of type -pointer to void. The function must not return a result. The value -of <[arg]> is registered and passed as the argument to <[function]>. - -The functions are kept in a LIFO stack; that is, the last function -enrolled by <<atexit>> or <<on_exit>> will be the first to execute when -your program exits. You can intermix functions using <<atexit>> and -<<on_exit>>. - -There is no built-in limit to the number of functions you can enroll -in this list; however, after every group of 32 functions is enrolled, -<<atexit>>/<<on_exit>> will call <<malloc>> to get space for the next part -of the list. The initial list of 32 functions is statically allocated, so -you can always count on at least that many slots available. - -RETURNS -<<on_exit>> returns <<0>> if it succeeds in enrolling your function, -<<-1>> if it fails (possible only if no space was available for -<<malloc>> to extend the list of functions). - -PORTABILITY -<<on_exit>> is a non-standard glibc extension - -Supporting OS subroutines required: None -*/ - -#include <stddef.h> -#include <stdlib.h> -#include <reent.h> - -/* - * Register a function to be performed at exit. - */ - -int -_DEFUN (on_exit, - (fn, arg), - _VOID _EXFUN ((*fn), (int, _PTR)) _AND - _PTR arg) -{ - struct _on_exit_args * args; - register struct _atexit *p; - void (*x)(void) = (void (*)(void))fn; - -/* _REENT_SMALL on_exit() doesn't allow more than the required 32 entries. */ -#ifdef _REENT_SMALL - p = &_GLOBAL_REENT->_atexit; - if (p->_ind >= _ATEXIT_SIZE) - return -1; - args = p->_on_exit_args_ptr; - if (args == NULL) - { - args = malloc (sizeof * p->_on_exit_args_ptr); - if (args == NULL) - return -1; - args->_fntypes = 0; - p->_on_exit_args_ptr = args; - } -#else - if ((p = _GLOBAL_REENT->_atexit) == NULL) - _GLOBAL_REENT->_atexit = p = &_GLOBAL_REENT->_atexit0; - if (p->_ind >= _ATEXIT_SIZE) - { - if ((p = (struct _atexit *) malloc (sizeof *p)) == NULL) - return -1; - p->_ind = 0; - p->_on_exit_args._fntypes = 0; - p->_next = _GLOBAL_REENT->_atexit; - _GLOBAL_REENT->_atexit = p; - } - args = & p->_on_exit_args; -#endif - args->_fntypes |= (1 << p->_ind); - args->_fnargs[p->_ind] = arg; - p->_fns[p->_ind++] = x; - return 0; -} |