diff --git a/components/libc/newlib/clock_time.c b/components/libc/newlib/clock_time.c
deleted file mode 100644
index c0fd9d82e3..0000000000
--- a/components/libc/newlib/clock_time.c
+++ /dev/null
@@ -1,43 +0,0 @@
-#include <rtthread.h>
-
-#include <time.h>
-#include <errno.h>
-#include "libc.h"
-
-int clock_getres(clockid_t clock_id, struct timespec *res)
-{
-	if ((clock_id != CLOCK_REALTIME) || (res == RT_NULL))
-	{
-		rt_set_errno(EINVAL);
-		return -1;
-	}
-
-	res->tv_sec  = 0;
-	res->tv_nsec = NANOSECOND_PER_TICK;
-
-	return 0;
-}
-
-int clock_gettime(clockid_t clock_id, struct timespec *tp)
-{
-	if ((clock_id != CLOCK_REALTIME) || (tp == RT_NULL))
-	{
-		rt_set_errno(EINVAL);
-		return -1;
-	}
-
-	libc_get_time(tp);
-	return 0;
-}
-
-int clock_settime(clockid_t clock_id, const struct timespec *tp)
-{
-	if ((clock_id != CLOCK_REALTIME) || (tp == RT_NULL))
-	{
-		rt_set_errno(EINVAL);
-		return -1;
-	}
-
-	libc_set_time(tp);
-	return 0;
-}
diff --git a/components/libc/newlib/libc.c b/components/libc/newlib/libc.c
index de8523a1f6..fcdc961f08 100644
--- a/components/libc/newlib/libc.c
+++ b/components/libc/newlib/libc.c
@@ -5,95 +5,6 @@
 #include <sys/time.h>
 #include "libc.h"
 
-struct timeval _timevalue;
-static void libc_system_time_init()
-{
-    time_t time;
-    rt_tick_t tick;
-    rt_device_t device;
-
-    time = 0;
-    device = rt_device_find("rtc");
-    if (device != RT_NULL)
-    {
-		/* get realtime seconds */
-        rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
-    }
-
-	/* get tick */
-    tick = rt_tick_get();
-
-    _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
-    _timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
-}
-
-int libc_get_time(struct timespec *time)
-{
-	rt_tick_t tick;
-	RT_ASSERT(time != RT_NULL);
-
-	/* get tick */
-	tick = rt_tick_get();
-
-	time->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
-	time->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
-
-	return 0;
-}
-
-int libc_set_time(const struct timespec *time)
-{
-	int second;
-	rt_tick_t tick;
-    rt_device_t device;
-
-	second = time->tv_sec;
-    device = rt_device_find("rtc");
-    if (device != RT_NULL)
-    {
-		/* get realtime seconds */
-        rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second);
-    }
-	else return -1;
-
-	/* get tick */
-    tick = rt_tick_get();
-
-	/* update timevalue */
-    _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
-    _timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
-
-	return 0;
-}
-
-int libc_time_to_tick(const struct timespec *time)
-{
-	int tick;
-	int microsecond, second;
-
-	RT_ASSERT(time != RT_NULL);
-
-	tick = RT_WAITING_FOREVER;
-	if (time != NULL)
-	{
-		if ((time->tv_nsec/1000 - _timevalue.tv_usec) < 0)
-		{
-			microsecond = (1000000UL + time->tv_nsec/1000) - _timevalue.tv_usec;
-			second  = time->tv_sec - 1;
-		}
-		else
-		{
-			microsecond = time->tv_nsec/1000 - _timevalue.tv_usec;
-			second  = time->tv_sec;
-		}
-
-		tick = second * RT_TICK_PER_SECOND + microsecond * RT_TICK_PER_SECOND / MICROSECOND_PER_SECOND;
-		if (tick < 0) tick = 0;
-	}
-
-	return tick;
-}
-
 void libc_system_init(const char* tty_name)
 {
 	int fd;
@@ -115,8 +26,6 @@ void libc_system_init(const char* tty_name)
 	putenv("PATH=/");
 	putenv("HOME=/");
 
-	/* initialize system time */
-	libc_system_time_init();
 #ifdef RT_USING_PTHREADS
 	pthread_system_init();
 #endif
diff --git a/components/pthreads/clock_time.c b/components/pthreads/clock_time.c
new file mode 100644
index 0000000000..8852f4990e
--- /dev/null
+++ b/components/pthreads/clock_time.c
@@ -0,0 +1,122 @@
+#include <rtthread.h>
+#include <pthread.h>
+
+struct timeval _timevalue;
+void clock_time_system_init()
+{
+    time_t time;
+    rt_tick_t tick;
+    rt_device_t device;
+
+    time = 0;
+    device = rt_device_find("rtc");
+    if (device != RT_NULL)
+    {
+		/* get realtime seconds */
+        rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
+    }
+
+	/* get tick */
+    tick = rt_tick_get();
+
+    _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
+    _timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
+}
+
+int clock_time_to_tick(const struct timespec *time)
+{
+	int tick;
+	int nsecond, second;
+	struct timespec tp;
+
+	RT_ASSERT(time != RT_NULL);
+
+	tick = RT_WAITING_FOREVER;
+	if (time != NULL)
+	{
+		/* get current tp */
+		clock_gettime(CLOCK_REALTIME, &tp);
+
+		if ((time->tv_nsec - tp.tv_nsec) < 0)
+		{
+			nsecond = NANOSECOND_PER_SECOND - (tp.tv_nsec - time->tv_nsec);
+			second  = time->tv_sec - tp.tv_sec - 1;
+		}
+		else
+		{
+			nsecond = time->tv_nsec - tp.tv_nsec;
+			second  = time->tv_sec - tp.tv_sec;
+		}
+
+		tick = second * RT_TICK_PER_SECOND + nsecond * RT_TICK_PER_SECOND / NANOSECOND_PER_SECOND;
+		if (tick < 0) tick = 0;
+	}
+
+	return tick;
+}
+
+int clock_getres  (clockid_t clockid, struct timespec *res)
+{
+	if ((clockid != CLOCK_REALTIME) || (res == RT_NULL))
+	{
+		rt_set_errno(EINVAL);
+		return -1;
+	}
+
+	res->tv_sec = 0;
+	res->tv_nsec = NANOSECOND_PER_SECOND/RT_TICK_PER_SECOND;
+
+	return 0;
+}
+
+int clock_gettime (clockid_t clockid, struct timespec *tp)
+{
+	rt_tick_t tick;
+
+	if ((clockid != CLOCK_REALTIME) || (tp == RT_NULL))
+	{
+		rt_set_errno(EINVAL);
+		return -1;
+	}
+
+	/* get tick */
+	tick = rt_tick_get();
+
+	tp->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
+	tp->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
+	
+	return 0;
+}
+
+int clock_settime (clockid_t clockid, const struct timespec *tp)
+{
+	int second;
+	rt_tick_t tick;
+    rt_device_t device;
+
+	if ((clockid != CLOCK_REALTIME) || (tp == RT_NULL))
+	{
+		rt_set_errno(EINVAL);
+		return -1;
+	}
+
+	/* get second */
+	second = tp->tv_sec;
+	/* get tick */
+    tick = rt_tick_get();
+
+	/* update timevalue */
+    _timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
+    _timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
+
+	/* update for RTC device */
+    device = rt_device_find("rtc");
+    if (device != RT_NULL)
+    {
+		/* set realtime seconds */
+        rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second);
+    }
+	else return -1;
+
+	return 0;
+}
diff --git a/components/pthreads/mqueue.c b/components/pthreads/mqueue.c
index 8f084741dd..96ee76e742 100644
--- a/components/pthreads/mqueue.c
+++ b/components/pthreads/mqueue.c
@@ -1,12 +1,6 @@
 #include "mqueue.h"
 #include "pthread_internal.h"
 
-#include <stdarg.h>
-#include <errno.h>
-#ifdef __GNUC__
-#include <sys/fcntl.h>
-#endif
-
 static mqd_t posix_mq_list = RT_NULL;
 static struct rt_semaphore posix_mq_lock;
 void posix_mq_system_init()
@@ -105,7 +99,7 @@ mqd_t mq_open(const char *name, int oflag, ...)
 	if (oflag & O_CREAT)
 	{
 	    va_start(arg, oflag);
-	    mode = (mode_t) va_arg(arg, unsigned int);
+	    mode = (mode_t) va_arg(arg, unsigned int); mode = mode;
 	    attr = (struct mq_attr *) va_arg(arg, struct mq_attr *);
 	    va_end(arg);
 
@@ -221,7 +215,7 @@ ssize_t mq_timedreceive(mqd_t mqdes, char *msg_ptr, size_t msg_len,
 		return -1;
 	}
 
-	tick = libc_time_to_tick(abs_timeout);
+	tick = clock_time_to_tick(abs_timeout);
 
 	result = rt_mq_recv(mqdes->mq, msg_ptr, msg_len, tick);
 	if (result == RT_EOK) return msg_len;
diff --git a/components/pthreads/mqueue.h b/components/pthreads/mqueue.h
index c6d17b80ff..d0788857be 100644
--- a/components/pthreads/mqueue.h
+++ b/components/pthreads/mqueue.h
@@ -2,9 +2,6 @@
 #define __MQUEUE_H__
 
 #include <rtthread.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/signal.h>
 #include <pthread.h>
 
 struct mqdes
diff --git a/components/pthreads/posix_types.h b/components/pthreads/posix_types.h
new file mode 100644
index 0000000000..fb068c994d
--- /dev/null
+++ b/components/pthreads/posix_types.h
@@ -0,0 +1,195 @@
+#ifndef __POSIX_TYPES_H__
+#define __POSIX_TYPES_H__
+
+#include <rtthread.h>
+
+/* compatible in different compiler and C runtime library */
+#ifdef RT_USING_NEWLIB
+/* normarlly, GNU GCC will use newlib as C runtime library */
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <sys/fcntl.h>
+
+#include <errno.h>
+#include <stdarg.h>
+
+#else
+
+#ifdef __CC_ARM                				/* ARM Compiler 	*/
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+
+typedef rt_int32_t clockid_t;
+typedef rt_int32_t key_t;		/* Used for interprocess communication. */
+typedef rt_int32_t pid_t;		/* Used for process IDs and process group IDs. */
+typedef signed long ssize_t;	/* Used for a count of bytes or an error indication. */
+typedef signed long time_t;		/* Used for time in seconds. */
+
+struct timespec {
+	time_t tv_sec;			/* seconds */
+	long tv_nsec;			/* nanoseconds */
+};
+
+struct timeval {
+    long    tv_sec;         /* seconds */
+    long    tv_usec;        /* microseconds */
+};
+
+/* errno definitions */
+#define EPERM		 1	/* Operation not permitted */
+#define ENOENT		 2	/* No such file or directory */
+#define ESRCH		 3	/* No such process */
+#define EINTR		 4	/* Interrupted system call */
+#define EIO			 5	/* I/O error */
+#define ENXIO		 6	/* No such device or address */
+#define E2BIG		 7	/* Arg list too long */
+#define ENOEXEC		 8	/* Exec format error */
+#define EBADF		 9	/* Bad file number */
+#define ECHILD		10	/* No child processes */
+#define EAGAIN		11	/* Try again */
+#define ENOMEM		12	/* Out of memory */
+#define EACCES		13	/* Permission denied */
+#define EFAULT		14	/* Bad address */
+#define ENOTBLK		15	/* Block device required */
+#define EBUSY		16	/* Device or resource busy */
+#define EEXIST		17	/* File exists */
+#define EXDEV		18	/* Cross-device link */
+#define ENODEV		19	/* No such device */
+#define ENOTDIR		20	/* Not a directory */
+#define EISDIR		21	/* Is a directory */
+#define EINVAL		22	/* Invalid argument */
+#define ENFILE		23	/* File table overflow */
+#define EMFILE		24	/* Too many open files */
+#define ENOTTY		25	/* Not a typewriter */
+#define ETXTBSY		26	/* Text file busy */
+#define EFBIG		27	/* File too large */
+#define ENOSPC		28	/* No space left on device */
+#define ESPIPE		29	/* Illegal seek */
+#define EROFS		30	/* Read-only file system */
+#define EMLINK		31	/* Too many links */
+#define EPIPE		32	/* Broken pipe */
+#define EDOM		33	/* Math argument out of domain of func */
+#define ERANGE		34	/* Math result not representable */
+#define ENOMSG		35	/* No message of desired type */
+#define EIDRM		36	/* Identifier removed */
+#define ECHRNG		37	/* Channel number out of range */
+#define EL2NSYNC	38	/* Level 2 not synchronized */
+#define EL3HLT		39	/* Level 3 halted */
+#define EL3RST		40	/* Level 3 reset */
+#define ELNRNG		41	/* Link number out of range */
+#define EUNATCH		42	/* Protocol driver not attached */
+#define ENOCSI		43	/* No CSI structure available */
+#define EL2HLT		44	/* Level 2 halted */
+#define EDEADLK		45	/* Resource deadlock would occur */
+#define ENOLCK		46	/* No record locks available */
+#define EBADE		50	/* Invalid exchange */
+#define EBADR		51	/* Invalid request descriptor */
+#define EXFULL		52	/* Exchange full */
+#define ENOANO		53	/* No anode */
+#define EBADRQC		54	/* Invalid request code */
+#define EBADSLT		55	/* Invalid slot */
+#define EDEADLOCK	56	/* File locking deadlock error */
+#define EBFONT		59	/* Bad font file format */
+#define ENOSTR		60	/* Device not a stream */
+#define ENODATA		61	/* No data available */
+#define ETIME		62	/* Timer expired */
+#define ENOSR		63	/* Out of streams resources */
+#define ENONET		64	/* Machine is not on the network */
+#define ENOPKG		65	/* Package not installed */
+#define EREMOTE		66	/* Object is remote */
+#define ENOLINK		67	/* Link has been severed */
+#define EADV		68	/* Advertise error */
+#define ESRMNT		69	/* Srmount error */
+#define ECOMM		70	/* Communication error on send */
+#define EPROTO		71	/* Protocol error */
+#define EDOTDOT		73	/* RFS specific error */
+#define EMULTIHOP	74	/* Multihop attempted */
+#define EBADMSG		77	/* Not a data message */
+#define ENAMETOOLONG	78	/* File name too long */
+#define EOVERFLOW	79	/* Value too large for defined data type */
+#define ENOTUNIQ	80	/* Name not unique on network */
+#define EBADFD		81	/* File descriptor in bad state */
+#define EREMCHG		82	/* Remote address changed */
+#define ELIBACC		83	/* Can not access a needed shared library */
+#define ELIBBAD		84	/* Accessing a corrupted shared library */
+#define ELIBSCN		85	/* .lib section in a.out corrupted */
+#define ELIBMAX		86	/* Attempting to link in too many shared libraries */
+#define ELIBEXEC	87	/* Cannot exec a shared library directly */
+#define EILSEQ		88	/* Illegal byte sequence */
+#define ENOSYS		89	/* Function not implemented */
+#define ELOOP		90	/* Too many symbolic links encountered */
+#define ERESTART	91	/* Interrupted system call should be restarted */
+#define ESTRPIPE	92	/* Streams pipe error */
+#define ENOTEMPTY	93	/* Directory not empty */
+#define EUSERS		94	/* Too many users */
+#define ENOTSOCK	95	/* Socket operation on non-socket */
+#define EDESTADDRREQ	96	/* Destination address required */
+#define EMSGSIZE	97	/* Message too long */
+#define EPROTOTYPE	98	/* Protocol wrong type for socket */
+#define ENOPROTOOPT	99	/* Protocol not available */
+#define EPROTONOSUPPORT	120	/* Protocol not supported */
+#define ESOCKTNOSUPPORT	121	/* Socket type not supported */
+#define EOPNOTSUPP	122	/* Operation not supported on transport endpoint */
+#define ENOTSUP		EOPNOTSUPP/* Operation not supported on transport endpoint */
+#define EPFNOSUPPORT	123	/* Protocol family not supported */
+#define EAFNOSUPPORT	124	/* Address family not supported by protocol */
+#define EADDRINUSE	125	/* Address already in use */
+#define EADDRNOTAVAIL	126	/* Cannot assign requested address */
+#define ENETDOWN	127	/* Network is down */
+#define ENETUNREACH	128	/* Network is unreachable */
+#define ENETRESET	129	/* Network dropped connection because of reset */
+#define ECONNABORTED	130	/* Software caused connection abort */
+#define ECONNRESET	131	/* Connection reset by peer */
+#define ENOBUFS		132	/* No buffer space available */
+#define EISCONN		133	/* Transport endpoint is already connected */
+#define ENOTCONN	134	/* Transport endpoint is not connected */
+#define EUCLEAN		135	/* Structure needs cleaning */
+#define ENOTNAM		137	/* Not a XENIX named type file */
+#define ENAVAIL		138	/* No XENIX semaphores available */
+#define EISNAM		139	/* Is a named type file */
+#define EREMOTEIO	140	/* Remote I/O error */
+#define EINIT		141	/* Reserved */
+#define EREMDEV		142	/* Error 142 */
+#define ESHUTDOWN	143	/* Cannot send after transport endpoint shutdown */
+#define ETOOMANYREFS	144	/* Too many references: cannot splice */
+#define ETIMEDOUT	145	/* Connection timed out */
+#define ECONNREFUSED	146	/* Connection refused */
+#define EHOSTDOWN	147	/* Host is down */
+#define EHOSTUNREACH	148	/* No route to host */
+#define EWOULDBLOCK	EAGAIN	/* Operation would block */
+#define EALREADY	149	/* Operation already in progress */
+#define EINPROGRESS	150	/* Operation now in progress */
+#define ESTALE		151	/* Stale NFS file handle */
+#define ECANCELED	158	/* AIO operation canceled */
+#define ENOMEDIUM	159	/* No medium found */
+#define EMEDIUMTYPE	160	/* Wrong medium type */
+#define	ENOKEY		161	/* Required key not available */
+#define	EKEYEXPIRED	162	/* Key has expired */
+#define	EKEYREVOKED	163	/* Key has been revoked */
+#define	EKEYREJECTED	164	/* Key was rejected by service */
+#define EDQUOT		1133	/* Quota exceeded */
+
+#ifdef RT_USING_DFS
+#include <dfs_posix.h>
+#else
+typedef rt_uint16_t mode_t;
+#define O_RDONLY		0000000
+#define O_WRONLY		0000001
+#define O_RDWR			0000002
+#define O_ACCMODE		0000003
+#define O_CREAT			0000100
+#define O_EXCL			0000200
+#define O_TRUNC			0001000
+#define O_APPEND		0002000
+#define O_DIRECTORY		0200000
+#endif
+
+#elif defined (__IAR_SYSTEMS_ICC__)			/* IAR Compiler		*/
+#elif defined (__GNUC__)        			/* GNU GCC Compiler, with minilibc */
+#endif
+
+#endif
+
+#endif
diff --git a/components/pthreads/pthread.c b/components/pthreads/pthread.c
index c4743c0a91..c779efed18 100644
--- a/components/pthreads/pthread.c
+++ b/components/pthreads/pthread.c
@@ -4,6 +4,9 @@
 
 int pthread_system_init(void)
 {
+	/* initialize clock and time */
+	clock_time_system_init();
+
 	/* initialize key area */
 	pthread_key_system_init();
 	/* initialize posix mqueue */
@@ -211,13 +214,14 @@ int pthread_join (pthread_t thread, void **value_ptr)
 		pthread_detach(thread);
 	}
 	else return ESRCH;
+	
+	return 0;
 }
 
 void pthread_exit (void* value)
 {
 	_pthread_data_t* ptd;
 	_pthread_cleanup_t* cleanup;
-	_pthread_key_data_t* key;
 	extern _pthread_key_data_t _thread_keys[PTHREAD_KEY_MAX];
 
 	ptd = _pthread_get_data(rt_thread_self());
@@ -457,4 +461,3 @@ int pthread_cancel(pthread_t thread)
 
 	return 0;
 }
-
diff --git a/components/pthreads/pthread.h b/components/pthreads/pthread.h
index f548aef0b9..30a1cbc4fd 100644
--- a/components/pthreads/pthread.h
+++ b/components/pthreads/pthread.h
@@ -15,8 +15,7 @@
 #define __PTHREAD_H__
 
 #include <rtthread.h>
-#include <errno.h>
-#include <sys/types.h>
+#include <posix_types.h>
 
 #define PTHREAD_KEY_MAX				8
 
@@ -254,5 +253,20 @@ struct sigevent {
   pthread_attr_t  *sigev_notify_attributes;    /* Notification Attributes */
 };
 
+/* posix clock and timer */
+#define MILLISECOND_PER_SECOND	1000UL
+#define MICROSECOND_PER_SECOND	1000000UL
+#define NANOSECOND_PER_SECOND	1000000000UL
+
+#define MILLISECOND_PER_TICK	(MILLISECOND_PER_SECOND / RT_TICK_PER_SECOND)
+#define MICROSECOND_PER_TICK	(MICROSECOND_PER_SECOND / RT_TICK_PER_SECOND)
+#define NANOSECOND_PER_TICK		(NANOSECOND_PER_SECOND  / RT_TICK_PER_SECOND)
+
+#define CLOCK_REALTIME      0
+
+int clock_getres  (clockid_t clockid, struct timespec *res);
+int clock_gettime (clockid_t clockid, struct timespec *tp);
+int clock_settime (clockid_t clockid, const struct timespec *tp);
+
 #endif
 
diff --git a/components/pthreads/pthread_barrier.c b/components/pthreads/pthread_barrier.c
index 8908ab5d68..ba57f1e22f 100644
--- a/components/pthreads/pthread_barrier.c
+++ b/components/pthreads/pthread_barrier.c
@@ -44,7 +44,6 @@ int pthread_barrier_destroy(pthread_barrier_t *barrier)
 int pthread_barrier_init(pthread_barrier_t *barrier,
        const pthread_barrierattr_t *attr, unsigned count)
 {
-	rt_err_t result;
 	if (!barrier) return EINVAL;
 	if (attr &&(*attr != PTHREAD_PROCESS_PRIVATE)) return EINVAL;
 
diff --git a/components/pthreads/pthread_cond.c b/components/pthreads/pthread_cond.c
index 235b35c316..1e2ee15e6d 100644
--- a/components/pthreads/pthread_cond.c
+++ b/components/pthreads/pthread_cond.c
@@ -1,4 +1,5 @@
 #include <pthread.h>
+#include "pthread_internal.h"
 
 int pthread_condattr_destroy(pthread_condattr_t *attr)
 {
@@ -49,7 +50,7 @@ int pthread_condattr_setpshared(pthread_condattr_t*attr, int pshared)
 int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
 {
 	rt_err_t result;
-	rt_uint8_t cond_name[RT_NAME_MAX];
+	char cond_name[RT_NAME_MAX];
 	static rt_uint16_t cond_num = 0;
 
 	/* parameter check */
@@ -169,7 +170,7 @@ int pthread_cond_timedwait(pthread_cond_t *cond,
 	int timeout;
 	rt_err_t result;
 
-	timeout = libc_time_to_tick(abstime);
+	timeout = clock_time_to_tick(abstime);
 	result = _pthread_cond_timedwait(cond, mutex, timeout);
 	if (result == RT_EOK) return 0;
 	if (result == -RT_ETIMEOUT) return ETIMEDOUT;
diff --git a/components/pthreads/pthread_internal.h b/components/pthreads/pthread_internal.h
index d9550fe50f..0a585b9ff8 100644
--- a/components/pthreads/pthread_internal.h
+++ b/components/pthreads/pthread_internal.h
@@ -58,8 +58,10 @@ rt_inline _pthread_data_t* _pthread_get_data(pthread_t thread)
 	return ptd;
 }
 
-extern int libc_time_to_tick(const struct timespec *time);
+int clock_time_to_tick(const struct timespec *time);
+void clock_time_system_init(void);
 void posix_mq_system_init(void);
 void posix_sem_system_init(void);
+void pthread_key_system_init(void);
 
 #endif
diff --git a/components/pthreads/pthread_mutex.c b/components/pthreads/pthread_mutex.c
index 4e244cee9e..3aeaf447b3 100644
--- a/components/pthreads/pthread_mutex.c
+++ b/components/pthreads/pthread_mutex.c
@@ -172,6 +172,8 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex)
 
 	result = rt_mutex_release(&(mutex->lock));
 	if (result == RT_EOK) return 0;
+	
+	return EINVAL;
 }
 
 int pthread_mutex_trylock(pthread_mutex_t *mutex)
diff --git a/components/pthreads/sched.h b/components/pthreads/sched.h
index 7d8e501cd6..015a753f8f 100644
--- a/components/pthreads/sched.h
+++ b/components/pthreads/sched.h
@@ -2,8 +2,7 @@
 #define __SCHED_H__
 
 #include <rtthread.h>
-#include <sys/types.h>
-#include <errno.h>
+#include <pthread.h>
 
 /* Thread scheduling policies */
 enum
diff --git a/components/pthreads/semaphore.c b/components/pthreads/semaphore.c
index 811ec1dc65..eb275ed9b3 100644
--- a/components/pthreads/semaphore.c
+++ b/components/pthreads/semaphore.c
@@ -1,8 +1,6 @@
-#include <errno.h>
-#include <sys/fcntl.h>
-
 #include <rtthread.h>
 #include "semaphore.h"
+#include "pthread_internal.h"
 
 static sem_t* posix_sem_list = RT_NULL;
 static struct rt_semaphore posix_sem_lock;
@@ -60,7 +58,9 @@ static sem_t *posix_sem_find(const char* name)
 		{
 			return iter;
 		}
-	}
+	}
+	
+	return RT_NULL;
 }
 
 int sem_close(sem_t *sem)
@@ -151,7 +151,6 @@ int sem_getvalue(sem_t *sem, int *sval)
 
 int sem_init(sem_t *sem, int pshared, unsigned int value)
 {
-	rt_err_t result;
 	char name[RT_NAME_MAX];
 	static rt_uint16_t psem_number = 0;
 
@@ -195,7 +194,7 @@ sem_t *sem_open(const char *name, int oflag, ...)
 	if (oflag & O_CREAT)
 	{
 		va_start(arg, oflag);
-		mode = (mode_t) va_arg( arg, unsigned int);
+		mode = (mode_t) va_arg( arg, unsigned int); mode = mode;
 		value = va_arg( arg, unsigned int);
 		va_end(arg);
 
@@ -286,7 +285,7 @@ int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout)
 	if (!sem || !abs_timeout) return EINVAL;
 
 	/* calculate os tick */
-	tick = libc_time_to_tick(abs_timeout);
+	tick = clock_time_to_tick(abs_timeout);
 	
 	result = rt_sem_take(sem->sem, tick);
 	if (result == -RT_ETIMEOUT)
diff --git a/components/pthreads/semaphore.h b/components/pthreads/semaphore.h
index 974da7e6c3..ea3510119b 100644
--- a/components/pthreads/semaphore.h
+++ b/components/pthreads/semaphore.h
@@ -2,7 +2,7 @@
 #define __POSIX_SEMAPHORE_H__
 
 #include <rtthread.h>
-#include <sys/time.h>
+#include <pthread.h>
 
 struct posix_sem
 {