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/*----------------------------------------------------------------------------
* Copyright (c) Huawei Technologies Co., Ltd. 2013-2021. All rights reserved.
* Description: LiteOS Kernel Mutex Demo Implementation
* Author: Huawei LiteOS Team
* Create: 2013-01-01
* 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 "los_api_mutex.h"
#include "los_mux.h"
#include "los_task.h"
#include "los_inspect_entry.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
#define HI_TASK_PRIOR 4
#define LO_TASK_PRIOR 5
#define DELAY_INTERVAL1 100
#define DELAY_INTERVAL2 300
#define MUTEX_OVERTIME 10
/* mux handle id */
STATIC UINT32 g_demoMux01;
/* task pid */
STATIC UINT32 g_demoTask1Id;
STATIC UINT32 g_demoTask2Id;
STATIC VOID MutexTask1Entry(VOID)
{
UINT32 ret;
printf("Task1 try to get mutex, wait 10 ticks.\n");
/* get mux */
ret = LOS_MuxPend(g_demoMux01, MUTEX_OVERTIME);
if (ret == LOS_OK) {
printf("Task1 get mutex g_demoMux01.\n");
/* release mux */
LOS_MuxPost(g_demoMux01);
return;
} else if (ret == LOS_ERRNO_MUX_TIMEOUT) {
printf("Task1 timeout and try to get mutex, wait forever.\n");
/* LOS_WAIT_FOREVER type get mux, LOS_MuxPend return until has been get mux */
ret = LOS_MuxPend(g_demoMux01, LOS_WAIT_FOREVER);
if (ret == LOS_OK) {
printf("Task1 wait forever, got mutex g_demoMux01 successfully.\n");
/* release mux */
LOS_MuxPost(g_demoMux01);
ret = InspectStatusSetById(LOS_INSPECT_MUTEX, LOS_INSPECT_STU_SUCCESS);
if (LOS_OK != ret) {
printf("Set inspect status failed.\n");
}
return;
}
}
return;
}
STATIC VOID MutexTask2Entry(VOID)
{
UINT32 ret;
printf("Task2 try to get the mutex, wait forever.\n");
/* get mux */
ret = LOS_MuxPend(g_demoMux01, LOS_WAIT_FOREVER);
if (ret != LOS_OK) {
printf("Task2 LOS_MuxPend failed.\n");
return;
}
printf("Task2 get mutex g_demoMux01 and suspend 100 ticks.\n");
/* task delay 100 ticks */
LOS_TaskDelay(DELAY_INTERVAL1);
printf("Task2 resumed and post the g_demoMux01.\n");
/* release mux */
LOS_MuxPost(g_demoMux01);
return;
}
UINT32 MutexLockDemo(VOID)
{
UINT32 ret;
TSK_INIT_PARAM_S taskInitParam;
printf("Kernel mutex demo start to run.\n");
/* create mux */
ret = LOS_MuxCreate(&g_demoMux01);
if (ret != LOS_OK) {
printf("Creat the mutex failed.\n");
return LOS_NOK;
}
LOS_TaskLock();
/* create task */
ret = memset_s(&taskInitParam, sizeof(TSK_INIT_PARAM_S), 0, sizeof(TSK_INIT_PARAM_S));
if (ret != EOK) {
return ret;
}
taskInitParam.pfnTaskEntry = (TSK_ENTRY_FUNC)MutexTask1Entry;
taskInitParam.pcName = "MutexLockDemoTask1";
taskInitParam.uwStackSize = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
taskInitParam.usTaskPrio = LO_TASK_PRIOR;
taskInitParam.uwResved = LOS_TASK_STATUS_DETACHED;
#ifdef LOSCFG_KERNEL_SMP
taskInitParam.usCpuAffiMask = CPUID_TO_AFFI_MASK(ArchCurrCpuid());
#endif
ret = LOS_TaskCreate(&g_demoTask1Id, &taskInitParam);
if (ret != LOS_OK) {
printf("Create mutex task1 failed.\n");
LOS_TaskUnlock();
return LOS_NOK;
}
taskInitParam.pfnTaskEntry = (TSK_ENTRY_FUNC)MutexTask2Entry;
taskInitParam.pcName = "MutexLockDemoTask2";
taskInitParam.uwStackSize = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
taskInitParam.usTaskPrio = HI_TASK_PRIOR;
taskInitParam.uwResved = LOS_TASK_STATUS_DETACHED;
ret = LOS_TaskCreate(&g_demoTask2Id, &taskInitParam);
if (ret != LOS_OK) {
printf("Create mutex task2 failed.\n");
if (LOS_OK != LOS_TaskDelete(g_demoTask1Id)) {
printf("Delete mutex task1 failed.\n");
}
LOS_TaskUnlock();
return LOS_NOK;
}
LOS_TaskUnlock();
/* task delay 300 ticks */
LOS_TaskDelay(DELAY_INTERVAL2);
/* delete mux */
LOS_MuxDelete(g_demoMux01);
return LOS_OK;
}
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
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