VxWorks系统中任务间通信的示例代码与技术解答

VxWorks是一个实时操作系统，其中任务间通信对于实现多任务协作至关重要。本示例代码演示了在VxWorks中使用消息队列进行任务间通信的方法，实现数据交换和同步。

#include <stdio.h>
#include <taskLib.h>
#include <msgQLib.h>

#define MSG_SIZE 50
#define MAX_MSGS 10

MSG_Q_ID msgQId;

void senderTask() {
    char message[MSG_SIZE] = "Hello from Sender!";
    if (msgQSend(msgQId, message, MSG_SIZE, WAIT_FOREVER, MSG_PRI_NORMAL) == ERROR) {
        printf("Failed to send message.\n");
    }
}

void receiverTask() {
    char receivedMsg[MSG_SIZE];
    if (msgQReceive(msgQId, receivedMsg, MSG_SIZE, WAIT_FOREVER) == ERROR) {
        printf("Failed to receive message.\n");
    } else {
        printf("Received message: %s\n", receivedMsg);
    }
}

void main() {
    msgQId = msgQCreate(MAX_MSGS, MSG_SIZE, MSG_Q_FIFO);
    if (msgQId == NULL) {
        printf("Failed to create message queue.\n");
        return;
    }

    taskSpawn("senderTask", 90, 0, 2000, (FUNCPTR)senderTask, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    taskSpawn("receiverTask", 90, 0, 2000, (FUNCPTR)receiverTask, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
}

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