103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
//---------------------------------------------------------------------------
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// Globals.cpp : Global information
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//
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// Copyright (c) 1996 Microsoft Corporation, All Rights Reserved
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// Developed by Sheridan Software Systems, Inc.
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//---------------------------------------------------------------------------
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#include "stdafx.h"
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SZTHISFILE
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// our global memory allocator and global memory pool
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//
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HANDLE g_hHeap;
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LPMALLOC g_pMalloc;
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HINSTANCE g_hinstance;
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//Count number of objects and number of locks.
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ULONG g_cLockCount=0;
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ULONG g_cObjectCount=0;
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CRITICAL_SECTION g_CriticalSection;
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// frequently used large integers
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//
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LARGE_INTEGER g_liMinus = {(ULONG)-1, -1}; // minus one
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LARGE_INTEGER g_liZero = {0, 0}; // - zero -
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LARGE_INTEGER g_liPlus = {0, 1}; // plus one
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//=--------------------------------------------------------------------------=
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// VDInitGlobals
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//=--------------------------------------------------------------------------=
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// Initialize global variables
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//
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// Parameters:
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// hinstResource - [in] The instance handle that contains resource strings
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//
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// Output:
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// TRUE if successful otherwise FALSE
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//
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BOOL VDInitGlobals(HINSTANCE hinstance)
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{
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g_pMalloc = NULL;
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g_hinstance = hinstance;
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g_hHeap = GetProcessHeap();
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if (!g_hHeap)
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{
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FAIL("Couldn't get Process Heap.");
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return FALSE;
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}
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InitializeCriticalSection(&g_CriticalSection);
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return TRUE;
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}
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//=--------------------------------------------------------------------------=
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// VDReleaseGlobals
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//=--------------------------------------------------------------------------=
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//
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void VDReleaseGlobals()
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{
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if (g_pMalloc)
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{
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g_pMalloc->Release();
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g_pMalloc = NULL;
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}
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#ifdef _DEBUG
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DumpObjectCounters();
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#endif // _DEBUG
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DeleteCriticalSection(&g_CriticalSection);
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}
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//=--------------------------------------------------------------------------=
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// VDUpdateObjectCount increments/decrements global object count
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//=--------------------------------------------------------------------------=
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//
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void VDUpdateObjectCount(int cChange)
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{
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EnterCriticalSection(&g_CriticalSection);
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g_cObjectCount += cChange;
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// get global malloc pointer object count greater than zero
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if (!g_pMalloc && g_cObjectCount > 0)
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{
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CoGetMalloc(MEMCTX_TASK, &g_pMalloc);
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}
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else
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// release hold on global malloc pointer when no more objects
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if (0 == g_cObjectCount && g_pMalloc)
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{
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g_pMalloc->Release();
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g_pMalloc = NULL;
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}
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LeaveCriticalSection(&g_CriticalSection);
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}
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