openharmonydocs/pthread_atfork_test_001.cpp

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#include "it_pthread_test.h"

static volatile int g_count = 0;
static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;
static int g_testAtforkCount = 0;
static int g_testAtforkPrepare = 0;
static int g_testAtforkParent = 0;
static int g_testAtforkChild = 0;
static const int SLEEP_TIME = 2;

static void Prepare()
{
    int err;
    ICUNIT_ASSERT_EQUAL_VOID(g_testAtforkCount, 1, g_testAtforkCount);
//    <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>꣬<EFBFBD><EAA3AC><EFBFBD>ڼ<EFBFBD><DABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD>㡣<EFBFBD><E3A1A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣬<EFBFBD><E3A3AC><EFBFBD>Ի<EFBFBD>ֹͣ<CDA3><D6B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><C8B7> g_testAtforkCount <20><><EFBFBD><EFBFBD> 1<><31>
    err = pthread_mutex_lock(&g_lock);
//    <20><><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_lock<63><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ɹ<EFBFBD><C9B9><EFBFBD>g_testAtforkPrepare <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD>߳<EFBFBD>ִ<EFBFBD><D6B4><EFBFBD><EFBFBD>׼<EFBFBD><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    ICUNIT_ASSERT_EQUAL_VOID(err, 0, err);
    g_testAtforkPrepare++;
}

static void Parent()
{
    int err;
    ICUNIT_ASSERT_EQUAL_VOID(g_testAtforkCount, 1, g_testAtforkCount);

    err = pthread_mutex_unlock(&g_lock);
//    <20><><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD>ͷ<EFBFBD>֮ǰ<D6AE><C7B0> Prepare <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD><EFBFBD> g_lock<63><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̷߳<DFB3><CCB7><EFBFBD><EFBFBD>ٽ<EFBFBD><D9BD><EFBFBD><EFBFBD><EFBFBD>
    ICUNIT_ASSERT_EQUAL_VOID(err, 0, err);
    g_testAtforkParent++;
//    <20><><EFBFBD><EFBFBD> g_testAtforkParent<6E><74><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><D6B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ز<EFBFBD><D8B2><EFBFBD><EFBFBD><EFBFBD>
}

static void child()
{
    int err;
    ICUNIT_ASSERT_EQUAL_VOID(g_testAtforkCount, 1, g_testAtforkCount);

    err = pthread_mutex_unlock(&g_lock);
    ICUNIT_ASSERT_EQUAL_VOID(err, 0, err);
    g_testAtforkChild++;
//    <20><><EFBFBD><EFBFBD> g_testAtforkChild<6C><64><EFBFBD><EFBFBD>ʾ<EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>ִ<EFBFBD><D6B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ز<EFBFBD><D8B2><EFBFBD><EFBFBD><EFBFBD>
}

static void *ThreadProc(void *arg)
{
    int err;
    
    // <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѭ<EFBFBD><D1AD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1> g_count <20>ﵽ 5<><35>
    while (g_count < 5) { 
        // <20><>ס<EFBFBD><D7A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_lock<63><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_count <20>ĸ<EFBFBD><C4B8>£<EFBFBD><C2A3><EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD>޸ġ<DEB8>
        err = pthread_mutex_lock(&g_lock);
        ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

        // <20><><EFBFBD><EFBFBD> g_count <20><>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>ʾִ<CABE><D6B4><EFBFBD><EFBFBD>һ<EFBFBD>μ<EFBFBD><CEBC><EFBFBD><EFBFBD><EFBFBD>
        g_count++;

        // <20><><EFBFBD><EFBFBD> SLEEP_AND_YIELD <20>꺯<EFBFBD><EABAAF><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD>߳<EFBFBD><DFB3><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ʱ<EFBFBD>䲢<EFBFBD>ó<EFBFBD> CPU<50><55><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߳<EFBFBD>ִ<EFBFBD>С<EFBFBD>
        SLEEP_AND_YIELD(SLEEP_TIME);

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_lock<63><6B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̷߳<DFB3><CCB7>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><D4B4>
        err = pthread_mutex_unlock(&g_lock);
        ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

        // <20>ٴε<D9B4><CEB5><EFBFBD> SLEEP_AND_YIELD <20>꺯<EFBFBD><EABAAF><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD>߳<EFBFBD><DFB3><EFBFBD><EFBFBD>߲<EFBFBD><DFB2>ó<EFBFBD> CPU<50><55>
        SLEEP_AND_YIELD(SLEEP_TIME);
    }

EXIT:
    return NULL;
}


static void *PthreadAtforkTest(void *arg)
{
    int err;
    pid_t pid;
    pthread_t tid;
    int status = 0;

    // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_count <20>Ͳ<EFBFBD><CDB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>صı<D8B5><C4B1><EFBFBD>
    g_count = 0;
    g_testAtforkCount = 0;
    g_testAtforkPrepare = 0;
    g_testAtforkParent = 0;
    g_testAtforkChild = 0;

    // <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>µ<EFBFBD><C2B5>߳<EFBFBD>
    err = pthread_create(&tid, NULL, ThreadProc, NULL);
    ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

    // ע<><D7A2> fork ǰ<>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    err = pthread_atfork(Prepare, Parent, child);
    ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

    // <20><><EFBFBD>²<EFBFBD><C2B2>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><D1B4><EFBFBD><EFBFBD>߳<EFBFBD>
    g_testAtforkCount++;

    // <20><><EFBFBD>߲<EFBFBD><DFB2>ó<EFBFBD> CPU <20><><EFBFBD><EFBFBD>
    SLEEP_AND_YIELD(SLEEP_TIME);

    // <20><><EFBFBD><EFBFBD> fork() <20><><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>
    pid = fork();
    ICUNIT_GOTO_WITHIN_EQUAL(pid, 0, 100000, pid, EXIT); // 100000, PID <20><><EFBFBD>ᳬ<EFBFBD><E1B3AC> 100000
    ICUNIT_GOTO_EQUAL(g_testAtforkPrepare, 1, g_testAtforkPrepare, EXIT);

    // <20>ӽ<EFBFBD><D3BD>̵Ĵ<CCB5><C4B4><EFBFBD><EFBFBD>߼<EFBFBD>
    if (pid == 0) {
        // <20>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD> g_testAtforkChild <20>Ƿ<EFBFBD>Ϊ 1<><31>ȷ<EFBFBD><C8B7><EFBFBD>ӽ<EFBFBD><D3BD>̵<EFBFBD>״̬
        ICUNIT_GOTO_EQUAL(g_testAtforkChild, 1, g_testAtforkChild, EXIT);

        // <20>ӽ<EFBFBD><D3BD>̽<EFBFBD><CCBD><EFBFBD>ѭ<EFBFBD><D1AD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1> g_count <20>ﵽ 5
        while (g_count < 5) {
            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> g_count
            err = pthread_mutex_lock(&g_lock);
            ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

            // <20><><EFBFBD><EFBFBD> g_count
            g_count++;

            // <20><><EFBFBD>߲<EFBFBD><DFB2>ó<EFBFBD> CPU <20><><EFBFBD><EFBFBD>
            SLEEP_AND_YIELD(SLEEP_TIME);

            // <20><><EFBFBD><EFBFBD>
            err = pthread_mutex_unlock(&g_lock);
            ICUNIT_GOTO_EQUAL(err, 0, err, EXIT);

            // <20><><EFBFBD>߲<EFBFBD><DFB2>ó<EFBFBD> CPU <20><><EFBFBD><EFBFBD>
            SLEEP_AND_YIELD(SLEEP_TIME);
        }

        // <20>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD>˳<EFBFBD><CBB3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>״̬Ϊ 15
        exit(15); // 15, <20><><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD>״̬
    }

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD> g_testAtforkParent <20>Ƿ<EFBFBD>Ϊ 1<><31>ȷ<EFBFBD>ϸ<EFBFBD><CFB8><EFBFBD><EFBFBD>̵<EFBFBD>״̬
    ICUNIT_GOTO_EQUAL(g_testAtforkParent, 1, g_testAtforkParent, EXIT_WAIT);

    // <20>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD>߳̽<DFB3><CCBD><EFBFBD>
    err = pthread_join(tid, NULL);
    ICUNIT_GOTO_EQUAL(err, 0, err, EXIT_WAIT);
// 
    // <20><><EFBFBD><EFBFBD><EFBFBD>̵ȴ<CCB5><C8B4>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD>˳<EFBFBD> 
    err = waitpid(pid, &status, 0);
    status = WEXITSTATUS(status);  // <20><>ȡ<EFBFBD>ӽ<EFBFBD><D3BD>̵<EFBFBD><CCB5>˳<EFBFBD>״̬
    ICUNIT_GOTO_EQUAL(err, pid, err, EXIT);
    ICUNIT_GOTO_EQUAL(status, 15, status, EXIT); // <20><><EFBFBD><EFBFBD><EFBFBD>ӽ<EFBFBD><D3BD>̵<EFBFBD><CCB5>˳<EFBFBD>״̬<D7B4>Ƿ<EFBFBD>Ϊ 15

EXIT:
    return NULL;

EXIT_WAIT:
    // <20><><EFBFBD><EFBFBD><EFBFBD>̵ȴ<CCB5><C8B4>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD>˳<EFBFBD>
    (void)waitpid(pid, &status, 0);
    return NULL;
}


static int Testcase()
{
    int ret;
    pthread_t newPthread;
    int curThreadPri, curThreadPolicy;
    pthread_attr_t a = { 0 };
    struct sched_param param = { 0 };

    ret = pthread_getschedparam(pthread_self(), &curThreadPolicy, &param);
    ICUNIT_ASSERT_EQUAL(ret, 0, -ret);

    curThreadPri = param.sched_priority;

    ret = pthread_attr_init(&a);
    pthread_attr_setinheritsched(&a, PTHREAD_EXPLICIT_SCHED);
    param.sched_priority = curThreadPri + 2; // 2, adjust the priority.
    pthread_attr_setschedparam(&a, &param);
    ret = pthread_create(&newPthread, &a, PthreadAtforkTest, 0);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = pthread_join(newPthread, NULL);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    return 0;
}

void ItTestPthreadAtfork001(void)
{
    TEST_ADD_CASE("IT_PTHREAD_ATFORK_001", Testcase, TEST_POSIX, TEST_MEM, TEST_LEVEL0, TEST_FUNCTION);
}