原创 vxworks一个任务和信号量的测试程序

这个程序有利于自己对信号量的理解

#include "semLib.h" 
#include "taskLib.h"
#include "osdrv.H"
/*测试适配的任务和信号量的函数*/
void taskSub1();
void taskSub2();

XHANDLE semm;

void taskMain() /*主任务：在shell下输入sp taskMain*/
{
    XHANDLE subId1,subId2;
    semm="SimOs"_CreateSemaphore(1, "no name");/*生成信号量*/
    printf("semm OK\n");
    subId1=SimOs_CreatThread(taskSub1, 0, 0, XTASK_PRIORITY_ABOVE_NORMAL,XW_DEFAULT, 2000, 0, "taskSub");/*生成子任务，优先级比主任务的100要高*/
    printf("taskSub1 spawned\n");

    subId2=SimOs_CreatThread(taskSub2, 0, 0, XTASK_PRIORITY_ABOVE_NORMAL,XW_DEFAULT, 2000, 0, "taskSub");/*生成子任务，优先级比主任务的100要高*/
    printf("taskSub2 spawned\n");
    taskSuspend(0);
    if(taskDelete(subId1)!=OK)
      printf("delete taskSub error:%d\n",errno);
    else
      printf("taskSub deleteed.OK\n"); 

    if(taskDelete(subId2)!=OK)
      printf("delete taskSub error:%d\n",errno);
    else
      printf("taskSub deleteed.OK\n");       
      
}

void taskSub1()
{
     SimOs_ObtainSemaphore(semm, XW_INFINITE);/*获取信号量*/
     taskSuspend(0);
     printf("taskSub:resumed and release mutex1a\n");
     SimOs_ReleaseSemaphore(semm);/*释放信号量*/
     printf("taskSub:resumed and release mutex1b\n");
 
}

void taskSub2()
{    printf("come into the taskSub2\n");
     SimOs_ObtainSemaphore(semm, XW_INFINITE);/*获取信号量*/
     printf("taskSub:resumed and release mutex2a\n");
     SimOs_ReleaseSemaphore(semm);/*释放信号量*/
     printf("taskSub:resumed and release mutex2b\n");
 
}