1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Common Public License, Version 1.0 * 7* by AT&T Intellectual Property * 8* * 9* A copy of the License is available at * 10* http://www.opensource.org/licenses/cpl1.0.txt * 11* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12* * 13* Information and Software Systems Research * 14* AT&T Research * 15* Florham Park NJ * 16* * 17* Glenn Fowler <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23 24/* 25 * ANSI C atexit() 26 * arrange for func to be called LIFO on exit() 27 */ 28 29#include <ast.h> 30 31#if _lib_atexit 32 33NoN(atexit) 34 35#else 36 37#if _lib_onexit || _lib_on_exit 38 39#if !_lib_onexit 40#define onexit on_exit 41#endif 42 43extern int onexit(void(*)(void)); 44 45int 46atexit(void (*func)(void)) 47{ 48 return(onexit(func)); 49} 50 51#else 52 53struct list 54{ 55 struct list* next; 56 void (*func)(void); 57}; 58 59static struct list* funclist; 60 61extern void _exit(int); 62 63int 64atexit(void (*func)(void)) 65{ 66 register struct list* p; 67 68 if (!(p = newof(0, struct list, 1, 0))) return(-1); 69 p->func = func; 70 p->next = funclist; 71 funclist = p; 72 return(0); 73} 74 75void 76_ast_atexit(void) 77{ 78 register struct list* p; 79 80 while (p = funclist) 81 { 82 funclist = p->next; 83 (*p->func)(); 84 } 85} 86 87#if _std_cleanup 88 89#if _lib__cleanup 90extern void _cleanup(void); 91#endif 92 93void 94exit(int code) 95{ 96 _ast_atexit(); 97#if _lib__cleanup 98 _cleanup(); 99#endif 100 _exit(code); 101} 102 103#else 104 105void 106_cleanup(void) 107{ 108 _ast_atexit(); 109} 110 111#endif 112 113#endif 114 115#endif 116