μCOS-II中OS_MUTEX.C源码中文注释版

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1、xilentz的网络文摘博客园   首页   新随笔   联系   订阅   管理随笔-204 文章-0 评论-10 trackbacks-0OS_MUTEX.C/***********************************************************************************************************                                               uC/OS-II*                                         TheReal-Ti

2、meKernel*                                 MUTUALEXCLUSIONSEMAPHOREMANAGEMENT**                         (c)Copyright1992-2002,JeanJ.Labrosse,Weston,FL*                                          AllRightsReserved**File:OS_MUTEX.C*By  :JeanJ.Labrosse                                           互斥型信号量管

3、理**********************************************************************************************************/#ifndef OS_MASTER_FILE#include"includes.h"#endif/***********************************************************************************************************                                

4、           LOCALCONSTANTS**********************************************************************************************************/#define OS_MUTEX_KEEP_LOWER_8  0x00FF#define OS_MUTEX_KEEP_UPPER_8  0xFF00#define OS_MUTEX_AVAILABLE     0x00FF#ifOS_MUTEX_EN>0/************************************

5、***********************************************************************                                  ACCEPTMUTUALEXCLUSIONSEMAPHORE**Description:This functionchecksthemutualexclusionsemaphoretoseeifaresourceisavailable.*             UnlikeOSMutexPend(),OSMutexAccept()doesnotsuspendthecalling

6、taskiftheresourceis*             notavailableortheeventdidnotoccur.**Arguments :pevent    isapointertotheeventcontrolblock**             err       isapointertoanerrorcodewhichwillbereturnedtoyourapplication:*                           OS_NO_ERR         ifthecallwassuccessful.*                   

7、        OS_ERR_EVENT_TYPE if'pevent'isnotapointertoamutex*                           OS_ERR_PEVENT_NULL'pevent'isaNULLpointer*                           OS_ERR_PEND_ISR    ifyoucalledthisfunctionfromanISR**Returns   :==1