add pthread initialization in libc_system_init.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1107 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/libc/newlib/libc.c

@@ -97,6 +97,7 @@ int libc_time_to_tick(const struct timespec *time)
 void libc_system_init(const char* tty_name)
 {
 	int fd;
+	extern int pthread_system_init(void);
 
 	/* init console device */
 	rt_console_init(tty_name);
@@ -112,4 +113,7 @@ void libc_system_init(const char* tty_name)
 
 	/* initialize system time */
 	libc_system_time_init();
+#ifdef RT_USING_PTHREADS
+	pthread_system_init();
+#endif
 }

components/pthreads/semaphore.h

@@ -17,14 +17,7 @@ struct posix_sem
 	/* next posix semaphore */
 	struct posix_sem* next;
 };
-typedef struct posix_sem posix_sem_t;
-
-struct semdes
-{
-	rt_uint32_t flags;
-	posix_sem_t* sem;
-};
-typedef struct semdes sem_t;
+typedef struct posix_sem sem_t;
 
 int sem_close(sem_t *sem);
 int sem_destroy(sem_t *sem);