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authorIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
committerIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
commit3950ffe2a485479f6561c27364d3d7df5a21d124 (patch)
tree468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/comp/atexit.c
downloadksh-upstream.tar.gz
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/comp/atexit.c')
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1 files changed, 115 insertions, 0 deletions
diff --git a/src/lib/libast/comp/atexit.c b/src/lib/libast/comp/atexit.c
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+++ b/src/lib/libast/comp/atexit.c
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+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1985-2011 AT&T Intellectual Property *
+* and is licensed under the *
+* Eclipse Public License, Version 1.0 *
+* by AT&T Intellectual Property *
+* *
+* A copy of the License is available at *
+* http://www.eclipse.org/org/documents/epl-v10.html *
+* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* Phong Vo <kpv@research.att.com> *
+* *
+***********************************************************************/
+#pragma prototyped
+
+/*
+ * ANSI C atexit()
+ * arrange for func to be called LIFO on exit()
+ */
+
+#include <ast.h>
+
+#if _lib_atexit
+
+NoN(atexit)
+
+#else
+
+#if _lib_onexit || _lib_on_exit
+
+#if !_lib_onexit
+#define onexit on_exit
+#endif
+
+extern int onexit(void(*)(void));
+
+int
+atexit(void (*func)(void))
+{
+ return(onexit(func));
+}
+
+#else
+
+struct list
+{
+ struct list* next;
+ void (*func)(void);
+};
+
+static struct list* funclist;
+
+extern void _exit(int);
+
+int
+atexit(void (*func)(void))
+{
+ register struct list* p;
+
+ if (!(p = newof(0, struct list, 1, 0))) return(-1);
+ p->func = func;
+ p->next = funclist;
+ funclist = p;
+ return(0);
+}
+
+void
+_ast_atexit(void)
+{
+ register struct list* p;
+
+ while (p = funclist)
+ {
+ funclist = p->next;
+ (*p->func)();
+ }
+}
+
+#if _std_cleanup
+
+#if _lib__cleanup
+extern void _cleanup(void);
+#endif
+
+void
+exit(int code)
+{
+ _ast_atexit();
+#if _lib__cleanup
+ _cleanup();
+#endif
+ _exit(code);
+}
+
+#else
+
+void
+_cleanup(void)
+{
+ _ast_atexit();
+}
+
+#endif
+
+#endif
+
+#endif