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/*----------------------------------------------------------------------------
* Copyright (c) Huawei Technologies Co., Ltd. 2013-2021. All rights reserved.
* Description: LiteOS Kernel Event 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_event.h"
#include "los_task.h"
#include "los_api_event.h"
#include "los_inspect_entry.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
/* task pid */
STATIC UINT32 g_demoTaskId;
/* event control struct */
STATIC EVENT_CB_S g_demoEvent;
/* wait event type */
#define EVENT_WAIT 0x00000001
#define EVENT_READ_OVERTIME 100
#define TASK_PRIOR 5
/* example task entry function */
STATIC VOID ReadTaskEntry(VOID)
{
UINT32 event;
UINT32 ret;
/*
* timeout, WAITMODE to read event, timeout is 100 ticks,
* if timeout, wake task directly
*/
printf("Read event task wait event 0x%x.\n", EVENT_WAIT);
event = LOS_EventRead(&g_demoEvent, EVENT_WAIT, LOS_WAITMODE_AND, EVENT_READ_OVERTIME);
if (event == EVENT_WAIT) {
printf("Read the event : 0x%x.\n", event);
ret = InspectStatusSetById(LOS_INSPECT_EVENT, LOS_INSPECT_STU_SUCCESS);
if (ret != LOS_OK) {
printf("Set inspect status failed.\n");
}
} else {
printf("Read the event timeout.\n");
ret = InspectStatusSetById(LOS_INSPECT_EVENT, LOS_INSPECT_STU_ERROR);
if (ret != LOS_OK) {
printf("Set inspect status failed.\n");
}
}
return;
}
UINT32 EventDemo(VOID)
{
UINT32 ret;
TSK_INIT_PARAM_S taskInitParam;
printf("Kernel event demo start to run.\n");
/* event init */
ret = LOS_EventInit(&g_demoEvent);
if (ret != LOS_OK) {
printf("Init the event failed.\n");
return LOS_NOK;
}
/* 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)ReadTaskEntry;
taskInitParam.pcName = "EventDemoReadTask";
taskInitParam.usTaskPrio = TASK_PRIOR;
taskInitParam.uwStackSize = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
taskInitParam.uwResved = LOS_TASK_STATUS_DETACHED;
ret = LOS_TaskCreate(&g_demoTaskId, &taskInitParam);
if (ret != LOS_OK) {
printf("Create read event task failed.\n");
return LOS_NOK;
}
/* write event */
printf("Write event.\n");
ret = LOS_EventWrite(&g_demoEvent, EVENT_WAIT);
if (ret != LOS_OK) {
printf("Write the event failed.\n");
return LOS_NOK;
}
/* clear event */
printf("Current event id : %d\n", g_demoEvent.uwEventID);
LOS_EventClear(&g_demoEvent, ~g_demoEvent.uwEventID);
printf("Current event id : %d\n", g_demoEvent.uwEventID);
return LOS_OK;
}
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
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