4.2 信号量的使用

下面给出了一个如何使用二值信号量的例子

#include <string.h>
#include "wm_include.h"
#include "lwip/netif.h"
#include "wm_netif.h"

tls_os_task_t tskHdl1 = NULL;
tls_os_task_t tskHdl2 = NULL;
static tls_os_sem_t *sem;

static void user_task1(void *data)
{
    tls_os_status_t res;
    while (1) {
        res = tls_os_sem_acquire(sem, 0);
        if (res == TLS_OS_SUCCESS) {
            printf("task1 got sem\n");
            tls_os_sem_release(sem);
            tls_os_time_delay(1000);
        }
    }
}

static void user_task2(void *data)
{
    tls_os_status_t res;
    while (1) {
        res = tls_os_sem_acquire(sem, 0);
        if (res == TLS_OS_SUCCESS) {
            printf("task2 got sem\n");
            tls_os_sem_release(sem);
            tls_os_time_delay(1000);
        }
    }
}

static void timerHandler(UINT64 param)
{
    printf("time up\n");
}

void UserMain(void)
{
    printf("\n User task \n");
#if 0//DEMO_CONSOLE
    CreateDemoTask();
#endif

    tls_os_status_t res = tls_os_sem_create(&sem, 1);

    tls_os_task_create(&tskHdl1, "user_tsk1",
                       user_task1,
                       (void *)0,
                       (void *)NULL,
                       1024, // 任务栈的大小
                       7,
                       0);

    tls_os_task_create(&tskHdl2, "user_tsk2",
                       user_task2,
                       (void *)0,
                       (void *)NULL,
                       1024,
                       8,
                       0);
}