/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "it_pthread_test.h"   // 引入测试头文件

// 全局变量定义
static pthread_mutex_t g_pthreadMuxTest1;  // 互斥锁
static pthread_cond_t g_pthrdCondTest1;    // 条件变量
static unsigned int g_pthreadExit = 0;     // 控制线程退出的标志

// 线程函数1，模拟一个消费者
static void *PthreadF01(void *t)
{
    int rc;
    unsigned int count = 0;
    const int testLoop = 2000;  // 循环次数为2000

    // 循环2000次进行条件变量等待和互斥锁操作
    while (count < testLoop) {
        // 加锁
        rc = pthread_mutex_lock(&g_pthreadMuxTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);  // 判断加锁是否成功，失败则跳转到EXIT

        // 等待条件变量，释放互斥锁并进入阻塞状态，直到条件变量通知
        rc = pthread_cond_wait(&g_pthrdCondTest1, &g_pthreadMuxTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);

        // 解锁
        rc = pthread_mutex_unlock(&g_pthreadMuxTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);
        count++;  // 增加计数器
    }

    // 设置退出标志
    g_pthreadExit = 1;

EXIT:
    return NULL;  // 线程函数结束
}

// 线程函数2，模拟一个生产者
static void *PthreadF02(void *t)
{
    int rc;

    // 当g_pthreadExit不为1时，继续循环发送信号
    while (g_pthreadExit != 1) {
        // 加锁
        rc = pthread_mutex_lock(&g_pthreadMuxTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);  // 判断加锁是否成功，失败则跳转到EXIT

        // 发送信号，通知一个等待的线程
        rc = pthread_cond_signal(&g_pthrdCondTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);

        // 解锁
        rc = pthread_mutex_unlock(&g_pthreadMuxTest1);
        ICUNIT_GOTO_EQUAL(rc, 0, rc, EXIT);
    }

EXIT:
    pthread_exit(NULL);  // 线程退出
}

// 测试用例
static unsigned int TestCase(void)
{
    int i;
    long t1 = 1;  // 线程1的标识
    long t2 = 2;  // 线程2的标识
    int rc;
    pthread_t threads[3];  // 创建3个线程
    pthread_attr_t attr;   // 线程属性
    const int loopNum = 2; // 循环创建和等待线程次数

    g_pthreadExit = 0;  // 初始化退出标志
    g_testCount = 0;    // 初始化测试计数器

    // 初始化互斥锁和条件变量
    pthread_mutex_init(&g_pthreadMuxTest1, NULL);
    pthread_cond_init(&g_pthrdCondTest1, NULL);

    // 创建线程1 (消费者)
    rc = pthread_create(&threads[0], NULL, PthreadF01, (void *)t1);
    ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认线程创建成功

    // 创建线程2 (生产者)
    rc = pthread_create(&threads[1], NULL, PthreadF02, (void *)t2);
    ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认线程创建成功

    // 等待线程1和线程2执行完毕
    for (i = 0; i < loopNum; i++) {
        rc = pthread_join(threads[i], NULL);
        ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认线程结束
    }

    // 销毁线程属性、互斥锁和条件变量
    rc = pthread_attr_destroy(&attr);
    ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认销毁线程属性成功

    rc = pthread_mutex_destroy(&g_pthreadMuxTest1);
    ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认销毁互斥锁成功

    rc = pthread_cond_destroy(&g_pthrdCondTest1);
    ICUNIT_ASSERT_EQUAL(rc, 0, rc);  // 确认销毁条件变量成功

    return 0;  // 返回0表示测试通过
}

// 测试入口函数
void ItTestPthreadCond002(void)
{
    TEST_ADD_CASE("IT_POSIX_PTHREAD_COND_002", TestCase, TEST_POSIX, TEST_PTHREAD, TEST_LEVEL2, TEST_FUNCTION);
}