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

osal/posix/include/private/posix_config_default.h

@@ -0,0 +1,74 @@
+/*----------------------------------------------------------------------------
+ * Tencent is pleased to support the open source community by making TencentOS
+ * available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ * If you have downloaded a copy of the TencentOS binary from Tencent, please
+ * note that the TencentOS binary is licensed under the BSD 3-Clause License.
+ *
+ * If you have downloaded a copy of the TencentOS source code from Tencent,
+ * please note that TencentOS source code is licensed under the BSD 3-Clause
+ * License, except for the third-party components listed below which are
+ * subject to different license terms. Your integration of TencentOS into your
+ * own projects may require compliance with the BSD 3-Clause License, as well
+ * as the other licenses applicable to the third-party components included
+ * within TencentOS.
+ *---------------------------------------------------------------------------*/
+
+#ifndef _POSIX_CONFIG_DEFAULT_H_
+#define  _POSIX_CONFIG_DEFAULT_H_
+
+
+#ifndef POSIX_CFG_PTHREAD_THREADS_MAX
+#define POSIX_CFG_PTHREAD_THREADS_MAX               32
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_DESTRUCTOR_ITERATIONS
+#define POSIX_CFG_PTHREAD_DESTRUCTOR_ITERATIONS     4
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_KEYS_MAX
+#define POSIX_CFG_PTHREAD_KEYS_MAX                  8
+#endif
+
+#ifndef POSIX_CFG_TIMERS_MAX
+#define POSIX_CFG_TIMERS_MAX                        8
+#endif
+
+#ifndef POSIX_CFG_MQUEUE_MAX
+#define POSIX_CFG_MQUEUE_MAX                        8
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_BARRIER_EN
+#define POSIX_CFG_PTHREAD_BARRIER_EN                1u
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_COND_EN
+#define POSIX_CFG_PTHREAD_COND_EN                   1u
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_MUTEX_EN
+#define POSIX_CFG_PTHREAD_MUTEX_EN                  1u
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_RWLOCK_EN
+#define POSIX_CFG_PTHREAD_RWLOCK_EN                 1u
+#endif
+
+#ifndef POSIX_CFG_PTHREAD_SPIN_EN
+#define POSIX_CFG_PTHREAD_SPIN_EN                   1u
+#endif
+
+#ifndef POSIX_CFG_SEM_EN
+#define POSIX_CFG_SEM_EN                            1u
+#endif
+
+#ifndef POSIX_CFG_MQUEUE_EN
+#define POSIX_CFG_MQUEUE_EN                         1u
+#endif
+
+#ifndef POSIX_CFG_TIMER_EN
+#define POSIX_CFG_TIMER_EN                          1u
+#endif
+
+#endif /* _POSIX_CONFIG_DEFAULT_H_ */