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git://sourceware.org/git/newlib-cygwin.git
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dc824ef736
* libc/include/stdlib.h: Add on_exit prototype.
* libc/include/sys/reent.h (struct _atexit): Add argument array
and bits to track type of exit routine to support both on_exit
and atexit.
(_REENT_INIT_PTR): Add missing fields that won't be zeroed out
by default and change the setting of the atexit structure.
(_REENT_INIT)[!_REENT_SMALL]: Remove extraneous end brace.
* libc/stdlib/on_exit.c: New file.
* libc/stdlib/Makefile.am: Add support for on_exit.
* libc/stdlib/Makefile.in: Regenerated.
* libc/stdlib/atexit.c: Change to initialize types field.
* libc/stdlib/exit.c: Change to look at types field for each
exit routine and either call an atexit-style or an on_exit-style
routine accordingly.
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
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* Copyright (c) 1990 Regents of the University of California.
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* All rights reserved.
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*
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* %sccs.include.redist.c%
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*/
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/*
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FUNCTION
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<<exit>>---end program execution
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INDEX
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exit
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ANSI_SYNOPSIS
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#include <stdlib.h>
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void exit(int <[code]>);
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TRAD_SYNOPSIS
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#include <stdlib.h>
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void exit(<[code]>)
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int <[code]>;
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DESCRIPTION
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Use <<exit>> to return control from a program to the host operating
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environment. Use the argument <[code]> to pass an exit status to the
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operating environment: two particular values, <<EXIT_SUCCESS>> and
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<<EXIT_FAILURE>>, are defined in `<<stdlib.h>>' to indicate success or
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failure in a portable fashion.
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<<exit>> does two kinds of cleanup before ending execution of your
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program. First, it calls all application-defined cleanup functions
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you have enrolled with <<atexit>>. Second, files and streams are
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cleaned up: any pending output is delivered to the host system, each
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open file or stream is closed, and files created by <<tmpfile>> are
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deleted.
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RETURNS
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<<exit>> does not return to its caller.
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PORTABILITY
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ANSI C requires <<exit>>, and specifies that <<EXIT_SUCCESS>> and
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<<EXIT_FAILURE>> must be defined.
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Supporting OS subroutines required: <<_exit>>.
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*/
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#include <stdlib.h>
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#include <unistd.h> /* for _exit() declaration */
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#include <reent.h>
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#ifndef _REENT_ONLY
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/*
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* Exit, flushing stdio buffers if necessary.
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*/
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void
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_DEFUN (exit, (code),
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int code)
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{
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register struct _atexit *p;
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register int n;
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int i = 1;
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#ifdef _REENT_SMALL
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for (p = &_REENT->_atexit, n = p->_ind-1, i = (n>=0) ? (1<<n) : 0;
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n >= 0; --n, i >>= 1)
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#else
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for (p = _REENT->_atexit; p; p = p->_next)
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for (n = p->_ind - 1, i = (n >= 0) ? (1 << n) : 0; n >= 0; --n, i >>= 1)
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#endif
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if (p->_fntypes & i)
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(*((void (*)(int, void *))p->_fns[n]))(code, p->_fnargs[n]);
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else
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(*p->_fns[n]) ();
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if (_REENT->__cleanup)
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(*_REENT->__cleanup) (_REENT);
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_exit (code);
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}
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#endif
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