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[Kernel] message 可以返回消息的实际大小 (#7709)

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zhkag
2023-06-21 10:22:42 +00:00
committed by GitHub
parent b4e59bac4e
commit 33f550cb65
18 changed files with 73 additions and 56 deletions
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2
documentation/device/uart/uart.md
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@@ -575,7 +575,7 @@ static void serial_thread_entry(void *parameter)
rt_memset(&msg, 0, sizeof(msg));
/* Read messages from the message queue*/
result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
if (result == RT_EOK)
if (result >= 0)
{
/*Read data from the serial port*/
rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);

4
documentation/thread-comm/thread-comm.md
View File

@@ -595,7 +595,7 @@ static void thread1_entry(void *parameter)
while (1)
{
/* Receive messages from the message queue */
if (rt_mq_recv(&mq, &buf, sizeof(buf), RT_WAITING_FOREVER) == RT_EOK)
if (rt_mq_recv(&mq, &buf, sizeof(buf), RT_WAITING_FOREVER) >= 0)
{
rt_kprintf("thread1: recv msg from msg queue, the content:%c\n", buf);
if (cnt == 19)
@@ -784,7 +784,7 @@ void message_handler()
struct msg msg_ptr; /* Local variable used to place the message */
/* Receive messages from the message queue into msg_ptr */
if (rt_mq_recv(mq, (void*)&msg_ptr, sizeof(struct msg)) == RT_EOK)
if (rt_mq_recv(mq, (void*)&msg_ptr, sizeof(struct msg)) >= 0)
{
/* Successfully received the message, corresponding data processing is performed */
}