VxWorks中如何使用互斥锁实现线程同步

本示例介绍如何在VxWorks中使用互斥锁来实现线程同步，保护多个线程对共享资源的访问。

#include <vxWorks.h>
#include <semLib.h>

SEM_ID mutex_sem;

void task1(void){
    while(1){
        semTake(mutex_sem, WAIT_FOREVER); //获取互斥锁
        printf("Task1 is accessing the shared resource...\n");
        semGive(mutex_sem); //释放互斥锁
        taskDelay(100); //延迟100ms
    }
}

void task2(void){
    while(1){
        semTake(mutex_sem, WAIT_FOREVER); //获取互斥锁
        printf("Task2 is accessing the shared resource...\n");
        semGive(mutex_sem); //释放互斥锁
        taskDelay(200); //延迟200ms
    }
}

void main(void){
    mutex_sem = semBCreate(SEM_Q_FIFO, SEM_FULL); //创建互斥锁
    taskSpawn("task1", 100, 0, 4096, task1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);//创建任务1
    taskSpawn("task2", 100, 0, 4096, task2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);//创建任务2
    while(1){
        taskDelay(1000); //延迟1s
    }
}

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