int ret;
}ThreadContext;
+// it's odd Be never patented that :D
+struct benaphore {
+ vint32 atom;
+ sem_id sem;
+};
+static inline int lock_ben(struct benaphore *ben)
+{
+ if (atomic_add(&ben->atom, 1) > 0)
+ return acquire_sem(ben->sem);
+ return B_OK;
+}
+static inline int unlock_ben(struct benaphore *ben)
+{
+ if (atomic_add(&ben->atom, -1) > 1)
+ return release_sem(ben->sem);
+ return B_OK;
+}
+
+static struct benaphore av_thread_lib_ben;
static int32 ff_thread_func(void *v){
ThreadContext *c= v;
avcodec_thread_free(s);
return -1;
}
+
+/* provide a mean to serialize calls to avcodec_*() for thread safety. */
+
+int avcodec_thread_lock_lib(void)
+{
+ return lock_ben(&av_thread_lib_ben);
+}
+
+int avcodec_thread_unlock_lib(void)
+{
+ return unlock_ben(&av_thread_lib_ben);
+}
+
+/* our versions of _init and _fini (which are called by those actually from crt.o) */
+
+void initialize_after(void)
+{
+ av_thread_lib_ben.atom = 0;
+ av_thread_lib_ben.sem = create_sem(0, "libavcodec benaphore");
+}
+
+void uninitialize_before(void)
+{
+ delete_sem(av_thread_lib_ben.sem);
+}
+
+
+