support posix

1. posix pthread.h: pthread, pthread_barrier, pthread_cond, pthread_mutex, , pthread_rwlock, pthread_spin, etc
2. posix semaphore.h: sem_*
3. posix mqueue.h: mq_*
4. posix time.h: timer_*
5. to support posix, add tos_barrier, tos_bitmap, tos_rwlock, tos_stopwatch, change name of k_task_t from a char * pointer to a char array.
6. sample, see examples\posix
7. project, see board\TencentOS_tiny_EVB_MX_Plus\KEIL\posix

kernel/core/include/tos_config_default.h

@@ -69,24 +69,6 @@
 /////////////////////////////////////////
 
 
-/////////////////////////////////////////
-// disable countdownlatch
-#ifdef TOS_CFG_COUNTDOWNLATCH_EN
-#undef  TOS_CFG_COUNTDOWNLATCH_EN
-#endif
-#define TOS_CFG_COUNTDOWNLATCH_EN           0u
-/////////////////////////////////////////
-
-
-/////////////////////////////////////////
-// disable completion
-#ifdef TOS_CFG_COMPLETION_EN
-#undef  TOS_CFG_COMPLETION_EN
-#endif
-#define TOS_CFG_COMPLETION_EN           0u
-/////////////////////////////////////////
-
-
 /////////////////////////////////////////
 // disable the "traditional" timer
 #ifdef TOS_CFG_TIMER_EN
@@ -206,14 +188,6 @@
 #define  TOS_CFG_SEM_EN                     0u
 #endif
 
-#ifndef TOS_CFG_COUNTDOWNLATCH_EN
-#define TOS_CFG_COUNTDOWNLATCH_EN           0u
-#endif
-
-#ifndef TOS_CFG_COMPLETION_EN
-#define TOS_CFG_COMPLETION_EN               0u
-#endif
-
 #ifndef TOS_CFG_TIMER_EN
 #define  TOS_CFG_TIMER_EN                   0u
 #endif