text: /*----------------------------------------------------------------------------
   * Copyright (c) <2018>, <Huawei Technologies 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.
   *---------------------------------------------------------------------------*/
  /*----------------------------------------------------------------------------
   * Notice of Export Control Law
   * ===============================================
   * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
   * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
   * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
   * applicable export control laws and regulations.
   *---------------------------------------------------------------------------*/
  /**
   *  DATE          AUTHOR         INSTRUCTION
   *  2019-11-16    mculover666    The first version  
   *
   */
  
  #include <osal.h>
  
  #define USER_TASK1_PRI  12
  #define USER_TASK2_PRI  11
  
  uint32_t public_value = 0;
  
  osal_mutex_t public_value_mutex;
  
  static int user_task1_entry()
  {
      while(1)
      {
          if(true == osal_mutex_lock(public_value_mutex))
          {
              printf("\r\ntask1: lock a mutex.\r\n");
              public_value += 10;
              printf("task1: public_value = %ld.\r\n", public_value);
              printf("task1: unlock a mutex.\r\n\r\n");
              osal_mutex_unlock(public_value_mutex);
              if(public_value > 100)
                  break;
              
          }
      }
  
      return 0;
  }
  static int user_task2_entry()
  {
      while (1)
      {
         if(true == osal_mutex_lock(public_value_mutex))
          {
              printf("\r\ntask2: lock a mutex.\r\n");
              public_value += 5; 
              printf("task2: public_value = %ld.\r\n", public_value);
              printf("task2: unlock a mutex.\r\n\r\n");
              osal_mutex_unlock(public_value_mutex);
              
              if(public_value > 90)
                  break;
  
              osal_task_sleep(10);
          }
      }
  
      return 0;
  }
  
  int standard_app_demo_main()
  {
  
      osal_mutex_create(&public_value_mutex);
      osal_task_create("user_task1",user_task1_entry,NULL,0x400,NULL,USER_TASK1_PRI);
      osal_task_create("user_task2",user_task2_entry,NULL,0x400,NULL,USER_TASK2_PRI);
  
      return 0;
  }