xiaoxiang781216 commented on code in PR #6279:
URL: https://github.com/apache/incubator-nuttx/pull/6279#discussion_r876096009
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include/nuttx/mutex.h:
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@@ -205,6 +214,200 @@ static inline int nxmutex_unlock(FAR mutex_t *mutex)
return nxsem_post(mutex);
}
+/****************************************************************************
+ * Name: nxrmutex_init
+ *
+ * Description:
+ * This function initializes the UNNAMED recursive mutex. Following a
+ * successful call to nxrmutex_init(), the recursive mutex may be used in
+ * subsequent calls to nxrmutex_lock(), nxrmutex_unlock(),
+ * and nxrmutex_trylock(). The recursive mutex remains usable
+ * until it is destroyed.
+ *
+ * Parameters:
+ * rmutex - Recursive mutex to be initialized
+ *
+ * Return Value:
+ * This is an internal OS interface and should not be used by applications.
+ * It follows the NuttX internal error return policy: Zero (OK) is
+ * returned on success. A negated errno value is returned on failure.
+ *
+ ****************************************************************************/
+
+static inline int nxrmutex_init(FAR rmutex_t *rmutex)
+{
+ rmutex->count = 0;
+ rmutex->holder = INVALID_PROCESS_ID;
+ return nxmutex_init(&rmutex->mutex);
+}
+
+/****************************************************************************
+ * Name: nxrmutex_destroy
+ *
+ * Description:
+ * This function destroy the UNNAMED recursive mutex.
+ *
+ * Parameters:
+ * rmutex - Recursive mutex to be destroyed
+ *
+ * Return Value:
+ * This is an internal OS interface and should not be used by applications.
+ * It follows the NuttX internal error return policy: Zero (OK) is
+ * returned on success. A negated errno value is returned on failure.
+ *
+ ****************************************************************************/
+
+static inline int nxrmutex_destroy(FAR rmutex_t *rmutex)
+{
+ return nxmutex_destroy(&rmutex->mutex);
+}
+
+/****************************************************************************
+ * Name: nrxmutex_lock
+ *
+ * Description:
+ * This function attempts to lock the recursive mutex referenced by
+ * 'rmutex'.The recursive mutex can be locked multiple times in the same
+ * thread.
+ *
+ * Parameters:
+ * rmutex - Recursive mutex descriptor.
+ *
+ * Return Value:
+ * This is an internal OS interface and should not be used by applications.
+ * It follows the NuttX internal error return policy: Zero (OK) is
+ * returned on success. A negated errno value is returned on failure.
+ * Possible returned errors:
+ *
+ ****************************************************************************/
+
+static inline int nxrmutex_lock(FAR rmutex_t *rmutex)
Review Comment:
BTW, since not all functions can be converted to macro equally. If we still
forbid to use the inline in common used code, it's very hard to approximate or
even exceed other RTOS.
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