| 1 | /* $Id: win32wndhandle.cpp,v 1.17 2002-12-12 12:33:22 sandervl Exp $ */
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| 2 | /*
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| 3 | * Win32 Handle Management Code for OS/2
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| 4 | *
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| 5 | *
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| 6 | * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | *
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| 8 | *
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| 9 | * TODO: The table should be dynamically increased when necessary
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| 10 | * This is just a quick and dirty implementation
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| 11 | * TODO: Probably need to clean up the table when app closes
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| 12 | * (also store PID and remove all handles with PID of terminating app)
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| 13 | * TODO: a linear list might not be the optimal implementation. Look
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| 14 | * into using some sort of tree (not important)
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| 15 | *
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| 16 | * Project Odin Software License can be found in LICENSE.TXT
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| 17 | *
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| 18 | */
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| 19 |
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| 20 | #include <os2win.h>
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| 21 | #include <vmutex.h>
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| 22 | #include "win32wndhandle.h"
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| 23 | #include <custombuild.h>
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| 24 |
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| 25 | #define DBG_LOCALLOG DBG_win32wndhandle
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| 26 | #include "dbglocal.h"
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| 27 |
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| 28 | //******************************************************************************
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| 29 |
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| 30 | //Global DLL Data
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| 31 | #pragma data_seg(_GLOBALDATA)
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| 32 | ULONG WindowHandleTable[MAX_WINDOW_HANDLES] = {0};
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| 33 | CRITICAL_SECTION_OS2 globalwhandlecritsect = {0};
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| 34 | ULONG lastIndex = 0;
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| 35 | #pragma data_seg()
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| 36 |
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| 37 | static char *pszWndHandleSemName = WINHANDLE_CRITSECTION_NAME;
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| 38 |
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| 39 | //******************************************************************************
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| 40 | //******************************************************************************
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| 41 | void WIN32API SetCustomWndHandleSemName(LPSTR pszSemName)
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| 42 | {
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| 43 | pszWndHandleSemName = pszSemName;
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| 44 | }
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| 45 | //******************************************************************************
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| 46 | //******************************************************************************
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| 47 | void InitializeWindowHandles()
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| 48 | {
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| 49 | if(globalwhandlecritsect.hmtxLock == 0) {
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| 50 | DosInitializeCriticalSection(&globalwhandlecritsect, pszWndHandleSemName);
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| 51 | }
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| 52 | else {
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| 53 | dprintf(("InitializeWindowHandles -> access shared critical section"));
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| 54 | DosAccessCriticalSection(&globalwhandlecritsect, pszWndHandleSemName);
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| 55 | }
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| 56 | }
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| 57 | //******************************************************************************
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| 58 | //******************************************************************************
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| 59 | BOOL HwAllocateWindowHandle(HWND *hwnd, DWORD dwUserData)
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| 60 | {
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| 61 | DosEnterCriticalSection(&globalwhandlecritsect);
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| 62 |
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| 63 | //find next free handle
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| 64 | if(lastIndex >= MAX_WINDOW_HANDLES-1) {
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| 65 | lastIndex = 0;
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| 66 | }
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| 67 | for(int i=lastIndex;i<MAX_WINDOW_HANDLES;i++) {
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| 68 | if(WindowHandleTable[i] == 0) {
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| 69 | lastIndex = i;
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| 70 | break;
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| 71 | }
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| 72 | }
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| 73 | if(i == MAX_WINDOW_HANDLES) {
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| 74 | //oops, out of handles
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| 75 | DosLeaveCriticalSection(&globalwhandlecritsect);
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| 76 | dprintf(("ERROR: USER32: HwAllocateWindowHandle OUT OF WINDOW HANDLES!!"));
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| 77 | DebugInt3();
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| 78 | return FALSE;
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| 79 | }
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| 80 | *hwnd = lastIndex+1; //we skip handle 0x68000000
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| 81 | *hwnd |= WNDHANDLE_MAGIC_HIGHWORD;
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| 82 | WindowHandleTable[lastIndex] = dwUserData;
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| 83 |
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| 84 | lastIndex++;
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| 85 | DosLeaveCriticalSection(&globalwhandlecritsect);
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| 86 | dprintf2(("HwAllocateWindowHandle %x", *hwnd));
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| 87 | return TRUE;
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| 88 | }
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| 89 | //******************************************************************************
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| 90 | //******************************************************************************
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| 91 | void HwFreeWindowHandle(HWND hwnd)
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| 92 | {
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| 93 | hwnd = hwnd - 1; //we skip handle 0x68000000
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| 94 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 95 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 96 | DosEnterCriticalSection(&globalwhandlecritsect);
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| 97 | WindowHandleTable[hwnd] = 0;
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| 98 | DosLeaveCriticalSection(&globalwhandlecritsect);
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| 99 | }
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| 100 | dprintf2(("HwFreeWindowHandle %x", hwnd));
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| 101 | }
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| 102 | //******************************************************************************
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| 103 | //******************************************************************************
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| 104 | BOOL HwGetWindowHandleData(HWND hwnd, DWORD *pdwUserData)
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| 105 | {
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| 106 | hwnd = hwnd - 1; //we skip handle 0x68000000
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| 107 | if((hwnd & 0xFFFF0000) != WNDHANDLE_MAGIC_HIGHWORD) {
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| 108 | return FALSE; //unknown window (PM?)
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| 109 | }
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| 110 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 111 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 112 | *pdwUserData = WindowHandleTable[hwnd];
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| 113 | return TRUE;
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| 114 | }
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| 115 | *pdwUserData = 0;
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| 116 | return FALSE;
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| 117 | }
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| 118 | //******************************************************************************
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| 119 | //******************************************************************************
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