| 1 | /* $Id: win32wndhandle.cpp,v 1.3 2000-01-01 14:57:33 cbratschi 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 | //******************************************************************************
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| 23 |
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| 24 | //Global DLL Data
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| 25 | #pragma data_seg(_GLOBALDATA)
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| 26 | ULONG WindowHandleTable[MAX_WINDOW_HANDLES] = {0};
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| 27 | VMutex tableMutex(TRUE);
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| 28 | ULONG lowestFreeIndex = 0;
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| 29 | #pragma data_seg()
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| 30 |
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| 31 | //******************************************************************************
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| 32 | //******************************************************************************
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| 33 | BOOL HwAllocateWindowHandle(HWND *hwnd, DWORD dwUserData)
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| 34 | {
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| 35 | tableMutex.enter();
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| 36 | if(lowestFreeIndex == -1) {
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| 37 | //oops, out of handles
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| 38 | dprintf(("USER32: HwAllocateWindowHandle OUT OF WINDOW HANDLES!!"));
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| 39 | DebugInt3();
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| 40 | tableMutex.leave();
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| 41 | return FALSE;
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| 42 | }
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| 43 | *hwnd = lowestFreeIndex;
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| 44 | *hwnd |= WNDHANDLE_MAGIC_HIGHWORD;
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| 45 | WindowHandleTable[lowestFreeIndex] = dwUserData;
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| 46 |
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| 47 | lowestFreeIndex = -1;
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| 48 |
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| 49 | //find next free handle
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| 50 | for(int i=0;i<MAX_WINDOW_HANDLES;i++) {
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| 51 | if(WindowHandleTable[i] == 0) {
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| 52 | lowestFreeIndex = i;
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| 53 | break;
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| 54 | }
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| 55 | }
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| 56 | tableMutex.leave();
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| 57 | return TRUE;
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| 58 | }
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| 59 | //******************************************************************************
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| 60 | //******************************************************************************
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| 61 | void HwFreeWindowHandle(HWND hwnd)
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| 62 | {
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| 63 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 64 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 65 | tableMutex.enter();
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| 66 | WindowHandleTable[hwnd] = 0;
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| 67 | if(lowestFreeIndex == -1 || hwnd < lowestFreeIndex)
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| 68 | lowestFreeIndex = hwnd;
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| 69 |
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| 70 | tableMutex.leave();
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| 71 | }
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| 72 | }
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| 73 | //******************************************************************************
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| 74 | //******************************************************************************
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| 75 | BOOL HwGetWindowHandleData(HWND hwnd, DWORD *pdwUserData)
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| 76 | {
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| 77 | if((hwnd & 0xFFFF0000) != WNDHANDLE_MAGIC_HIGHWORD) {
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| 78 | return FALSE; //unknown window (PM?)
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| 79 | }
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| 80 | hwnd &= WNDHANDLE_MAGIC_MASK;
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| 81 | if(hwnd < MAX_WINDOW_HANDLES) {
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| 82 | *pdwUserData = WindowHandleTable[hwnd];
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| 83 | return TRUE;
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| 84 | }
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| 85 | *pdwUserData = 0;
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| 86 | return FALSE;
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| 87 | }
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| 88 | //******************************************************************************
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| 89 | //******************************************************************************
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