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#include "los_sem.h"
#include "securec.h"
/* 任务ID */
static UINT32 g_testTaskId01;
static UINT32 g_testTaskId02;
/* 测试任务优先级 */
#define TASK_PRIO_TEST 5
/* 信号量结构体id */
static UINT32 g_semId;
VOID Example_SemTask1(VOID)
{
UINT32 ret;
printf("Example_SemTask1 try get sem g_semId ,timeout 10 ticks.\n");
/* 定时阻塞模式申请信号量,定时时间为10ticks */
ret = LOS_SemPend(g_semId, 10);
/*申请到信号量*/
if (ret == LOS_OK) {
LOS_SemPost(g_semId);
return;
}
/* 定时时间到,未申请到信号量 */
if (ret == LOS_ERRNO_SEM_TIMEOUT) {
printf("Example_SemTask1 timeout and try get sem g_semId wait forever.\n");
/*永久阻塞模式申请信号量*/
ret = LOS_SemPend(g_semId, LOS_WAIT_FOREVER);
printf("Example_SemTask1 wait_forever and get sem g_semId .\n");
if (ret == LOS_OK) {
LOS_SemPost(g_semId);
return;
}
}
}
VOID Example_SemTask2(VOID)
{
UINT32 ret;
printf("Example_SemTask2 try get sem g_semId wait forever.\n");
/* 永久阻塞模式申请信号量 */
ret = LOS_SemPend(g_semId, LOS_WAIT_FOREVER);
if (ret == LOS_OK) {
printf("Example_SemTask2 get sem g_semId and then delay 20ticks .\n");
}
/* 任务休眠20 ticks */
LOS_TaskDelay(20);
printf("Example_SemTask2 post sem g_semId .\n");
/* 释放信号量 */
LOS_SemPost(g_semId);
return;
}
UINT32 ExampleTaskEntry(VOID)
{
UINT32 ret;
TSK_INIT_PARAM_S task1;
TSK_INIT_PARAM_S task2;
/* 创建信号量 */
LOS_SemCreate(0,&g_semId);
/* 锁任务调度 */
LOS_TaskLock();
/*创建任务1*/
(VOID)memset_s(&task1, sizeof(TSK_INIT_PARAM_S), 0, sizeof(TSK_INIT_PARAM_S));
task1.pfnTaskEntry = (TSK_ENTRY_FUNC)Example_SemTask1;
task1.pcName = "TestTsk1";
task1.uwStackSize = OS_TSK_DEFAULT_STACK_SIZE;
task1.usTaskPrio = TASK_PRIO_TEST;
ret = LOS_TaskCreate(&g_testTaskId01, &task1);
if (ret != LOS_OK) {
printf("task1 create failed .\n");
return LOS_NOK;
}
/* 创建任务2 */
(VOID)memset_s(&task2, sizeof(TSK_INIT_PARAM_S), 0, sizeof(TSK_INIT_PARAM_S));
task2.pfnTaskEntry = (TSK_ENTRY_FUNC)Example_SemTask2;
task2.pcName = "TestTsk2";
task2.uwStackSize = OS_TSK_DEFAULT_STACK_SIZE;
task2.usTaskPrio = (TASK_PRIO_TEST - 1);
ret = LOS_TaskCreate(&g_testTaskId02, &task2);
if (ret != LOS_OK) {
printf("task2 create failed .\n");
return LOS_NOK;
}
/* 解锁任务调度 */
LOS_TaskUnlock();
ret = LOS_SemPost(g_semId);
/* 任务休眠40 ticks */
LOS_TaskDelay(40);
/* 删除信号量 */
LOS_SemDelete(g_semId);
/* 删除任务1 */
ret = LOS_TaskDelete(g_testTaskId01);
if (ret != LOS_OK) {
printf("task1 delete failed .\n");
return LOS_NOK;
}
/* 删除任务2 */
ret = LOS_TaskDelete(g_testTaskId02);
if (ret != LOS_OK) {
printf("task2 delete failed .\n");
return LOS_NOK;
}
return LOS_OK;
}
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