Libc-825.40.1.tar.gz

[apple/libc.git] / stdlib / FreeBSD / atexit.c

diff --git a/stdlib/FreeBSD/atexit.c b/stdlib/FreeBSD/atexit.c
index 05dad84025954574484d29997d0dccb7e156afe2..6acc776147cba9b1928ee68b30101578be027d5d 100644 (file)
--- a/stdlib/FreeBSD/atexit.c
+++ b/stdlib/FreeBSD/atexit.c
@@ -41,14 +41,23 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/atexit.c,v 1.8 2007/01/09 00:28:09 imp E
 #include <stdlib.h>
 #include <unistd.h>
 #include <pthread.h>
+#if defined(__DYNAMIC__) || defined (__BLOCKS__)
+#include <dlfcn.h>
+#endif /* defined(__DYNAMIC__) */
 #include "atexit.h"
 #include "un-namespace.h"
 
+#ifdef __BLOCKS__
+#include <Block.h>
+#endif /* __BLOCKS__ */
 #include "libc_private.h"
 
 #define        ATEXIT_FN_EMPTY 0
 #define        ATEXIT_FN_STD   1
 #define        ATEXIT_FN_CXA   2
+#ifdef __BLOCKS__
+#define        ATEXIT_FN_BLK   3
+#endif /* __BLOCKS__ */
 
 static pthread_mutex_t atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
 
@@ -63,6 +72,9 @@ struct atexit {
                union {
                        void (*std_func)(void);
                        void (*cxa_func)(void *);
+#ifdef __BLOCKS__
+                       void (^block)(void);
+#endif /* __BLOCKS__ */
                } fn_ptr;                       /* function pointer */
                void *fn_arg;                   /* argument for CXA callback */
                void *fn_dso;                   /* shared module handle */
@@ -70,6 +82,7 @@ struct atexit {
 };
 
 static struct atexit *__atexit;                /* points to head of LIFO stack */
+static int new_registration;
 
 /*
  * Register the function described by 'fptr' to be called at application
@@ -105,6 +118,7 @@ atexit_register(struct atexit_fn *fptr)
                __atexit = p;
        }
        p->fns[p->ind++] = *fptr;
+       new_registration = 1;
        _MUTEX_UNLOCK(&atexit_mutex);
        return 0;
 }
@@ -116,17 +130,50 @@ int
 atexit(void (*func)(void))
 {
        struct atexit_fn fn;
+       struct dl_info info;
        int error;
 
        fn.fn_type = ATEXIT_FN_STD;
-       fn.fn_ptr.std_func = func;;
+       fn.fn_ptr.std_func = func;
        fn.fn_arg = NULL;
+#if defined(__DYNAMIC__)
+       if ( dladdr(func, &info) )
+               fn.fn_dso = info.dli_fbase;
+       else 
+               fn.fn_dso = NULL;
+#else /* ! defined(__DYNAMIC__) */
        fn.fn_dso = NULL;
+#endif /* defined(__DYNAMIC__) */
 
        error = atexit_register(&fn);   
        return (error);
 }
 
+#ifdef __BLOCKS__
+int
+atexit_b(void (^block)(void))
+{
+       struct atexit_fn fn;
+       struct dl_info info;
+       int error;
+
+       fn.fn_type = ATEXIT_FN_BLK;
+       fn.fn_ptr.block = Block_copy(block);
+       fn.fn_arg = NULL;
+#if defined(__DYNAMIC__)
+       if ( dladdr(block, &info) )
+               fn.fn_dso = info.dli_fbase;
+       else 
+               fn.fn_dso = NULL;
+#else /* ! defined(__DYNAMIC__) */
+       fn.fn_dso = NULL;
+#endif /* defined(__DYNAMIC__) */
+
+       error = atexit_register(&fn);   
+       return (error);
+}
+#endif /* __BLOCKS__ */
+
 /*
  * Register a function to be performed at exit or when an shared object
  * with given dso handle is unloaded dynamically.
@@ -152,13 +199,14 @@ __cxa_atexit(void (*func)(void *), void *arg, void *dso)
  * handlers are called.
  */
 void
-__cxa_finalize(void *dso)
+__cxa_finalize(const void *dso)
 {
        struct atexit *p;
        struct atexit_fn fn;
        int n;
 
        _MUTEX_LOCK(&atexit_mutex);
+restart:
        for (p = __atexit; p; p = p->next) {
                for (n = p->ind; --n >= 0;) {
                        if (p->fns[n].fn_type == ATEXIT_FN_EMPTY)
@@ -171,6 +219,7 @@ __cxa_finalize(void *dso)
                          has already been called.
                        */
                        p->fns[n].fn_type = ATEXIT_FN_EMPTY;
+                       new_registration = 0;
                        _MUTEX_UNLOCK(&atexit_mutex);
                
                        /* Call the function of correct type. */
@@ -178,7 +227,13 @@ __cxa_finalize(void *dso)
                                fn.fn_ptr.cxa_func(fn.fn_arg);
                        else if (fn.fn_type == ATEXIT_FN_STD)
                                fn.fn_ptr.std_func();
+#ifdef __BLOCKS__
+                       else if (fn.fn_type == ATEXIT_FN_BLK)
+                               fn.fn_ptr.block();
+#endif /* __BLOCKS__ */
                        _MUTEX_LOCK(&atexit_mutex);
+                       if (new_registration)
+                           goto restart;
                }
        }
        _MUTEX_UNLOCK(&atexit_mutex);