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/tos_barrier.c

@@ -0,0 +1,111 @@
+/*----------------------------------------------------------------------------
+ * 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 "tos_k.h"
+
+__API__ k_err_t tos_barrier_create(k_barrier_t *barrier, k_barrier_cnt_t count)
+{
+    TOS_PTR_SANITY_CHECK(barrier);
+
+    if (count == 0u) {
+        return K_ERR_BARRIER_COUNT_INVALID;
+    }
+
+    barrier->count = count;
+    pend_object_init(&barrier->pend_obj);
+    TOS_OBJ_INIT(barrier, KNL_OBJ_TYPE_BARRIER);
+
+    return K_ERR_NONE;
+}
+
+__API__ k_err_t tos_barrier_destroy(k_barrier_t *barrier)
+{
+    TOS_CPU_CPSR_ALLOC();
+
+    TOS_PTR_SANITY_CHECK(barrier);
+    TOS_OBJ_VERIFY(barrier, KNL_OBJ_TYPE_BARRIER);
+
+    TOS_CPU_INT_DISABLE();
+
+    if (!pend_is_nopending(&barrier->pend_obj)) {
+        pend_wakeup_all(&barrier->pend_obj, PEND_STATE_DESTROY);
+    }
+
+    pend_object_deinit(&barrier->pend_obj);
+
+    TOS_OBJ_DEINIT(barrier);
+
+    TOS_CPU_INT_ENABLE();
+    knl_sched();
+
+    return K_ERR_NONE;
+}
+
+__API__ k_err_t tos_barrier_pend(k_barrier_t *barrier)
+{
+    TOS_CPU_CPSR_ALLOC();
+
+    TOS_IN_IRQ_CHECK();
+    TOS_PTR_SANITY_CHECK(barrier);
+    TOS_OBJ_VERIFY(barrier, KNL_OBJ_TYPE_BARRIER);
+
+    TOS_CPU_INT_DISABLE();
+
+    if (barrier->count == 0u) {
+        TOS_CPU_INT_ENABLE();
+        return K_ERR_BARRIER_OVERFLOW;
+    }
+
+    if (barrier->count == (k_barrier_cnt_t)1u) {
+        barrier->count = (k_barrier_cnt_t)0u;
+
+        if (!pend_is_nopending(&barrier->pend_obj)) {
+            pend_wakeup_all(&barrier->pend_obj, PEND_STATE_POST);
+        }
+
+        TOS_CPU_INT_ENABLE();
+        return K_ERR_NONE;
+    }
+
+    if (knl_is_sched_locked()) {
+        TOS_CPU_INT_ENABLE();
+        return K_ERR_PEND_SCHED_LOCKED;
+    }
+
+    --barrier->count;
+    pend_task_block(k_curr_task, &barrier->pend_obj, TOS_TIME_FOREVER);
+
+    TOS_CPU_INT_ENABLE();
+    knl_sched();
+
+    return pend_state2errno(k_curr_task->pend_state);
+}
+
+__API__ k_err_t tos_barrier_reset(k_barrier_t *barrier, k_barrier_cnt_t count)
+{
+    TOS_CPU_CPSR_ALLOC();
+
+    TOS_PTR_SANITY_CHECK(barrier);
+    TOS_OBJ_VERIFY(barrier, KNL_OBJ_TYPE_BARRIER);
+
+    TOS_CPU_INT_DISABLE();
+    barrier->count = count;
+    TOS_CPU_INT_ENABLE();
+
+    return K_ERR_NONE;
+}
+