bugfix: thread->error will be changed unexpectedly when sending a mail in interrupt context.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1626 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/ipc.c

@@ -1452,13 +1452,22 @@ rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
 	/* parameter check */
 	RT_ASSERT(mb != RT_NULL);
 
-	tick_delta = 0;
-
 	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(mb->parent.parent)));
 
 	/* disable interrupt */
 	temp = rt_hw_interrupt_disable();
 
+	/* for non-blocking call */
+	if (mb->entry == 0 && timeout == 0)
+	{
+		rt_hw_interrupt_enable(temp);
+		return -RT_ETIMEOUT;
+	}
+
+	RT_DEBUG_NOT_IN_INTERRUPT;
+
+	tick_delta = 0;
+
 	/* get current thread */
 	thread = rt_thread_self();
 
@@ -1478,8 +1487,6 @@ rt_err_t rt_mb_recv (rt_mailbox_t mb, rt_uint32_t* value, rt_int32_t timeout)
 			return -RT_ETIMEOUT;
 		}
 
-		RT_DEBUG_NOT_IN_INTERRUPT;
-
 		/* suspend current thread */
 		rt_ipc_list_suspend(&(mb->parent.suspend_thread),
 				thread, mb->parent.parent.flag);
@@ -1952,13 +1959,23 @@ rt_err_t rt_mq_recv (rt_mq_t mq, void* buffer, rt_size_t size, rt_int32_t timeou
 
 	RT_OBJECT_HOOK_CALL(rt_object_trytake_hook, (&(mq->parent.parent)));
 
+	/* disable interrupt */
+	temp = rt_hw_interrupt_disable();
+
+	/* for non-blocking call */
+	if (mq->entry == 0 && timeout == 0)
+	{
+		rt_hw_interrupt_enable(temp);
+		return -RT_ETIMEOUT;
+	}
+
+	RT_DEBUG_NOT_IN_INTERRUPT;
+
 	tick_delta = 0;
+
 	/* get current thread */
 	thread = rt_thread_self();
 
-	/* disable interrupt */
-	temp = rt_hw_interrupt_disable();
-
 	/* message queue is empty */
 	while (mq->entry == 0)
 	{
@@ -1975,7 +1992,6 @@ rt_err_t rt_mq_recv (rt_mq_t mq, void* buffer, rt_size_t size, rt_int32_t timeou
 			return -RT_ETIMEOUT;
 		}
 
-		RT_DEBUG_NOT_IN_INTERRUPT;
 
 		/* suspend current thread */
 		rt_ipc_list_suspend(&(mq->parent.suspend_thread),