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/semaphore.c

@@ -0,0 +1,137 @@
+/*----------------------------------------------------------------------------
+ * 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.
+ *---------------------------------------------------------------------------*/
+
+#include "private/posix_config.h"
+
+#include "errno.h"
+#include "semaphore.h"
+#include "private/time.h"
+
+#if POSIX_CFG_SEM_EN > 0u
+
+__NOTSUPP__ int sem_close(sem_t *sem)
+{
+    return EOPNOTSUPP;
+}
+
+__API__ int sem_destroy(sem_t *sem)
+{
+    k_err_t kerr;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+    kerr = tos_sem_destroy((k_sem_t *)sem);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+__API__ int sem_getvalue(sem_t *sem, int *sval)
+{
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+    TOS_PTR_SANITY_CHECK_RC(sval, EINVAL);
+
+    *sval = ((k_sem_t *)sem)->count;
+    return 0;
+}
+
+__API__ int sem_init(sem_t *sem, int pshared, unsigned value)
+{
+    k_err_t kerr;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+    kerr = tos_sem_create((k_sem_t *)sem, value);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+__NOTSUPP__ sem_t *sem_open(const char *name, int oflag, ...)
+{
+    return K_NULL;
+}
+
+__API__ int sem_post(sem_t *sem)
+{
+    k_err_t kerr;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+    kerr = tos_sem_post((k_sem_t *)sem);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+__API__ int sem_timedwait(sem_t *sem, const struct timespec *abstime)
+{
+    k_err_t kerr;
+    k_tick_t ktick;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+
+    ktick   = timespec_to_ktick(abstime);
+    kerr    = tos_sem_pend((k_sem_t *)sem, ktick);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+__API__ int sem_trywait(sem_t *sem)
+{
+    k_err_t kerr;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+    kerr = tos_sem_pend((k_sem_t *)sem, TOS_TIME_NOWAIT);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+__NOTSUPP__ int sem_unlink(const char *name)
+{
+    return EOPNOTSUPP;
+}
+
+__API__ int sem_wait(sem_t *sem)
+{
+    k_err_t kerr;
+
+    TOS_PTR_SANITY_CHECK_RC(sem, EINVAL);
+
+    kerr = tos_sem_pend((k_sem_t *)sem, TOS_TIME_FOREVER);
+    if (kerr == K_ERR_NONE) {
+        return 0;
+    }
+
+    return EINVAL;
+}
+
+#endif /* POSIX_CFG_SEM_EN */