Merge pull request #4404 from KyleChenjh/lts-v3.1.x

[Update] Sync from v4.0.3

1 files changed, 43 insertions, 0 deletions

diff --git a/components/cplusplus/cxx_Mutex.cpp b/components/cplusplus/cxx_Mutex.cpp
new file mode 100644
index 0000000000..229e842446
--- /dev/null
+++ b/components/cplusplus/cxx_Mutex.cpp
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+#include "Mutex.h"
+
+using namespace rtthread;
+
+Mutex::Mutex(const char *name)
+{
+    rt_mutex_init(&mID, name, RT_IPC_FLAG_FIFO);
+}
+
+bool Mutex::lock(int32_t millisec)
+{
+    rt_int32_t tick;
+
+    if (millisec < 0)
+        tick = -1;
+    else
+        tick = rt_tick_from_millisecond(millisec);
+
+    return rt_mutex_take(&mID, tick) == RT_EOK;
+}
+
+bool Mutex::trylock()
+{
+    return lock(0);
+}
+
+void Mutex::unlock()
+{
+    rt_mutex_release(&mID);
+}
+
+Mutex::~Mutex()
+{
+    rt_mutex_detach(&mID);
+}