xiaoxiang781216 commented on code in PR #17734:
URL: https://github.com/apache/nuttx/pull/17734#discussion_r2653116689
##########
include/nuttx/net/usrsock.h:
##########
@@ -267,6 +269,124 @@ begin_packed_struct struct usrsock_message_socket_event_s
int16_t usockid;
} end_packed_struct;
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Global protection lock for usrsock socket */
+
+extern rmutex_t g_usrsock_lock;
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: usrsock_lock
+ *
+ * Description:
+ * Take the global usrsock socket lock
+ *
+ ****************************************************************************/
+
+static inline_function void usrsock_lock(void)
+{
+ nxrmutex_lock(&g_usrsock_lock);
+}
+
+/****************************************************************************
+ * Name: usrsock_unlock
+ *
+ * Description:
+ * Release the global usrsock socket lock
+ *
+ ****************************************************************************/
+
+static inline_function void usrsock_unlock(void)
+{
+ nxrmutex_unlock(&g_usrsock_lock);
+}
+
+/****************************************************************************
+ * Name: usrsock_sem_timedwait
+ *
+ * Description:
+ * Wait for sem while temporarily releasing the usrsock lock.
+ *
+ ****************************************************************************/
+
+static inline_function int
+usrsock_sem_timedwait(FAR sem_t *sem, bool interruptible,
+ unsigned int timeout)
+{
+#ifdef CONFIG_NET
+ return net_sem_timedwait2(sem, interruptible, timeout, &g_usrsock_lock,
+ NULL);
+#else
+ return 0;
Review Comment:
it's wrong to no-op when CONFIG_NET isn't enabled.
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