From 8b82b834826249dff299353da44188429d18dde2 Mon Sep 17 00:00:00 2001
From: Meco Man <920369182@qq.com>
Date: Sun, 30 May 2021 11:43:44 +0800
Subject: [PATCH] =?UTF-8?q?[kernel]=20=E5=A2=9E=E5=8A=A0rt=5Fmutex=5Ftryta?=
 =?UTF-8?q?ke?=
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---
 include/rtthread.h |  1 +
 src/ipc.c          | 18 ++++++++++++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/include/rtthread.h b/include/rtthread.h
index 784b208a76..ccd2d147a8 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -322,6 +322,7 @@ rt_mutex_t rt_mutex_create(const char *name, rt_uint8_t flag);
 rt_err_t rt_mutex_delete(rt_mutex_t mutex);
 
 rt_err_t rt_mutex_take(rt_mutex_t mutex, rt_int32_t time);
+rt_err_t rt_mutex_trytake(rt_mutex_t mutex);
 rt_err_t rt_mutex_release(rt_mutex_t mutex);
 rt_err_t rt_mutex_control(rt_mutex_t mutex, int cmd, void *arg);
 #endif
diff --git a/src/ipc.c b/src/ipc.c
index 22e0f06bc6..6cd38b74ab 100755
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -37,7 +37,8 @@
  * 2020-07-29     Meco Man     fix thread->event_set/event_info when received an
  *                             event without pending
  * 2020-10-11     Meco Man     add value overflow-check code
- * 2021-01-03     Meco Man     add rt_mb_urgent()
+ * 2021-01-03     Meco Man     implement rt_mb_urgent()
+ * 2021-05-30     Meco Man     implement rt_mutex_trytake()
  * 2021-01-20     hupu         fix priority inversion bug of mutex
  */
 
@@ -452,7 +453,7 @@ RTM_EXPORT(rt_sem_take);
  */
 rt_err_t rt_sem_trytake(rt_sem_t sem)
 {
-    return rt_sem_take(sem, 0);
+    return rt_sem_take(sem, RT_WAITING_NO);
 }
 RTM_EXPORT(rt_sem_trytake);
 
@@ -843,6 +844,19 @@ __again:
 }
 RTM_EXPORT(rt_mutex_take);
 
+/**
+ * This function will try to take a mutex and immediately return
+ *
+ * @param mutex the mutex object
+ *
+ * @return the error code
+ */
+rt_err_t rt_mutex_trytake(rt_mutex_t mutex)
+{
+    return rt_mutex_take(mutex, RT_WAITING_NO);
+}
+RTM_EXPORT(rt_mutex_trytake);
+
 /**
  * This function will release a mutex, if there are threads suspended on mutex,
  * it will be waked up.