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48 lines
1.2 KiB
48 lines
1.2 KiB
/*
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*
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* NOTES:
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*
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* REVISIONS:
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* rct 09Feb93 Made Equal() const
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* jwa 09FEB93 Changed return types for Wait and TimedWait to CHAR
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* Added theClosingFlag to be used to signal when the destructor has been called
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* rct 20Apr93 Changed return types, added some comments
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* cad27May93 added contant apc_semaphore
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* cad09Jul93: re-wrote as event semaphore
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*
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* pcy08Apr94: Trim size, use static iterators, dead code removal
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*/
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#ifndef __SEMAPHOR_H
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#define __SEMAPHOR_H
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#include "cdefine.h"
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#include "_defs.h"
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#include "apc.h"
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#include "apcobj.h"
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_CLASSDEF( Semaphore )
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class Semaphore : public Obj {
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protected:
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public:
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Semaphore() : Obj() {};
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virtual INT Post() = 0;
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virtual INT Clear() = 0;
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virtual INT Pulse() {INT err = Post(); Clear(); return err;};
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virtual INT IsPosted() = 0;
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virtual INT Wait() {return TimedWait(-1L);};// wait indefinitely
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#if (C_OS & C_NLM)
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virtual INT TimedWait( SLONG aTimeOut ) = 0;// 0, <0 (block), n>0
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#else
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virtual INT TimedWait( LONG aTimeOut ) = 0;// 0, <0 (block), n>0
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#endif
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};
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#endif
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