53 lines
1 KiB
C++
53 lines
1 KiB
C++
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// xlock.cpp -- global lock for locales, etc.
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#include <stdlib.h>
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#include <yvals.h>
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#if _MULTI_THREAD
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#include "xmtx.h"
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_STD_BEGIN
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#define MAX_LOCK 4 /* must be power of two */
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static _Rmtx mtx[MAX_LOCK];
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static long init = -1;
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_Init_locks::_Init_locks()
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{ // initialize locks
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if (InterlockedIncrement(&init) == 0)
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for (int count = 0; count < MAX_LOCK; ++count)
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_Mtxinit(&mtx[count]);
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}
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_Init_locks::~_Init_locks()
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{ // clean up locks
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if (InterlockedDecrement(&init) < 0)
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for (int count = 0; count < MAX_LOCK; ++count)
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_Mtxdst(&mtx[count]);
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}
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static _Init_locks initlocks;
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_Lockit::_Lockit()
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: _Locktype(0)
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{ // lock default mutex
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_Mtxlock(&mtx[0]);
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}
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_Lockit::_Lockit(int kind)
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: _Locktype(kind & (MAX_LOCK - 1))
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{ // lock the mutex
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_Mtxlock(&mtx[_Locktype]);
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}
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_Lockit::~_Lockit()
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{ // unlock the mutex
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_Mtxunlock(&mtx[_Locktype]);
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}
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_STD_END
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#endif // _MULTI_THREAD
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/*
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* Copyright (c) 1992-2001 by P.J. Plauger. ALL RIGHTS RESERVED.
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* Consult your license regarding permissions and restrictions.
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V3.10:0009 */
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