| 1 | /* $Id: win32wndhandle.cpp,v 1.1 1999-08-28 19:32:47 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 | *
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| 14 | * Project Odin Software License can be found in LICENSE.TXT
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | #include <os2win.h>
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| 19 | #include <vmutex.h>
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| 20 | #include "win32wndhandle.h"
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| 21 |
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| 22 | #define MAX_WINDOW_HANDLES 1024
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| 23 | #define WNDHANDLE_MAGIC_HIGHWORD 0x68000000
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| 24 | #define WNDHANDLE_MAGIC_MASK 0x0000FFFF
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| 25 |
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| 26 | //******************************************************************************
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| 27 |
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| 28 | //Global DLL Data
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| 29 | #pragma data_seg(_GLOBALDATA)
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| 30 | ULONG WindowHandleTable[MAX_WINDOW_HANDLES] = {0};
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| 31 | VMutex tableMutex(TRUE);
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| 32 | ULONG lowestFreeIndex = 0;
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| 33 | #pragma data_seg()
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| 34 |
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| 35 | //******************************************************************************
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| 36 | //******************************************************************************
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| 37 | BOOL HwAllocateWindowHandle(HWND *hwnd, DWORD dwUserData)
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| 38 | {
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| 39 | tableMutex.enter();
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| 40 | if(lowestFreeIndex == -1) {
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| 41 | //oops, out of handles
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| 42 | dprintf(("USER32: HwAllocateWindowHandle OUT OF WINDOW HANDLES!!"));
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| 43 | DebugInt3();
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| 44 | tableMutex.leave();
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| 45 | return FALSE;
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| 46 | }
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| 47 | *hwnd = lowestFreeIndex;
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| 48 | *hwnd |= WNDHANDLE_MAGIC_HIGHWORD;
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| 49 | WindowHandleTable[lowestFreeIndex] = dwUserData;
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| 50 |
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| 51 | lowestFreeIndex = -1;
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| 52 |
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| 53 | //find next free handle
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| 54 | for(int i=0;i<MAX_WINDOW_HANDLES;i++) {
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| 55 | if(WindowHandleTable[i] == 0) {
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| 56 | lowestFreeIndex = i;
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| 57 | break;
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| 58 | }
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| 59 | }
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| 60 | tableMutex.leave();
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| 61 | return TRUE;
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| 62 | }
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| 63 | //******************************************************************************
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| 64 | //******************************************************************************
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| 65 | void HwFreeWindowHandle(HWND hwnd)
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| 66 | {
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| 67 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 68 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 69 | tableMutex.enter();
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| 70 | WindowHandleTable[hwnd] = 0;
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| 71 | if(lowestFreeIndex == -1 || hwnd < lowestFreeIndex)
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| 72 | lowestFreeIndex = hwnd;
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| 73 |
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| 74 | tableMutex.leave();
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| 75 | }
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| 76 | }
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| 77 | //******************************************************************************
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| 78 | //******************************************************************************
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| 79 | BOOL HwGetWindowHandleData(HWND hwnd, DWORD *pdwUserData)
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| 80 | {
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| 81 | if((hwnd & 0xFFFF0000) != WNDHANDLE_MAGIC_HIGHWORD) {
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| 82 | return FALSE; //unknown window (PM?)
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| 83 | }
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| 84 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 85 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 86 | *pdwUserData = WindowHandleTable[hwnd];
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| 87 | return TRUE;
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| 88 | }
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| 89 | *pdwUserData = 0;
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| 90 | return FALSE;
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| 91 | }
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| 92 | //******************************************************************************
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| 93 | //******************************************************************************
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