source: trunk/src/user32/win32wndhandle.cpp

Last change on this file was 21916, checked in by dmik, 14 years ago

Merge branch gcc-kmk to trunk.
File size: 4.5 KB
Line 
1/* $Id: win32wndhandle.cpp,v 1.20 2004-03-18 13:18:33 sandervl Exp $ */
2/*
3 * Win32 Handle Management Code for OS/2
4 *
5 *
6 * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
7 *
8 *
9 * TODO: The table should be dynamically increased when necessary
10 * This is just a quick and dirty implementation
11 * TODO: Probably need to clean up the table when app closes
12 * (also store PID and remove all handles with PID of terminating app)
13 * TODO: a linear list might not be the optimal implementation. Look
14 * into using some sort of tree (not important)
15 *
16 * Project Odin Software License can be found in LICENSE.TXT
17 *
18 */
19
20#include <os2win.h>
21#include <vmutex.h>
22#include "win32wndhandle.h"
23#include <custombuild.h>
24
25#define DBG_LOCALLOG DBG_win32wndhandle
26#include "dbglocal.h"
27
28//******************************************************************************
29
30//
31// Global DLL Data (keep it in sync with globaldata.asm!)
32//
33extern ULONG WindowHandleTable[MAX_WINDOW_HANDLES]; // = {0}
34extern CRITICAL_SECTION_OS2 globalwhandlecritsect; // = {0}
35extern ULONG lastIndex; // = 0
36
37//******************************************************************************
38//******************************************************************************
39
40static const char *pszWndHandleSemName = WINHANDLE_CRITSECTION_NAME;
41
42//******************************************************************************
43//******************************************************************************
44void WIN32API SetCustomWndHandleSemName(LPSTR pszSemName)
45{
46 pszWndHandleSemName = pszSemName;
47}
48//******************************************************************************
49//******************************************************************************
50void InitializeWindowHandles()
51{
52 if(globalwhandlecritsect.hevLock == 0) {
53 dprintf(("InitializeWindowHandles %x -> create shared critical section", &globalwhandlecritsect));
54 }
55 else {
56 dprintf(("InitializeWindowHandles %x -> access shared critical section", &globalwhandlecritsect));
57 }
58 DosAccessCriticalSection(&globalwhandlecritsect, pszWndHandleSemName);
59}
60//******************************************************************************
61//******************************************************************************
62void FinalizeWindowHandles()
63{
64 DosDeleteCriticalSection(&globalwhandlecritsect);
65}
66//******************************************************************************
67//******************************************************************************
68BOOL HwAllocateWindowHandle(HWND *hwnd, DWORD dwUserData)
69{
70 DosEnterCriticalSection(&globalwhandlecritsect);
71
72 //find next free handle
73 if(lastIndex >= MAX_WINDOW_HANDLES-1) {
74 lastIndex = 0;
75 }
76 int i;
77 for(i=lastIndex;i<MAX_WINDOW_HANDLES;i++) {
78 if(WindowHandleTable[i] == 0) {
79 lastIndex = i;
80 break;
81 }
82 }
83 if(i == MAX_WINDOW_HANDLES) {
84 //oops, out of handles
85 DosLeaveCriticalSection(&globalwhandlecritsect);
86 dprintf(("ERROR: USER32: HwAllocateWindowHandle OUT OF WINDOW HANDLES!!"));
87 DebugInt3();
88 return FALSE;
89 }
90 *hwnd = lastIndex+1; //we skip handle 0x68000000
91 *hwnd |= WNDHANDLE_MAGIC_HIGHWORD;
92 WindowHandleTable[lastIndex] = dwUserData;
93
94 lastIndex++;
95 DosLeaveCriticalSection(&globalwhandlecritsect);
96 dprintf2(("HwAllocateWindowHandle %x", *hwnd));
97 return TRUE;
98}
99//******************************************************************************
100//******************************************************************************
101void HwFreeWindowHandle(HWND hwnd)
102{
103 hwnd = hwnd - 1; //we skip handle 0x68000000
104 hwnd &= WNDHANDLE_MAGIC_MASK;
105 if(hwnd < MAX_WINDOW_HANDLES) {
106 DosEnterCriticalSection(&globalwhandlecritsect);
107 WindowHandleTable[hwnd] = 0;
108 DosLeaveCriticalSection(&globalwhandlecritsect);
109 }
110 dprintf2(("HwFreeWindowHandle %x", hwnd));
111}
112//******************************************************************************
113//******************************************************************************
114BOOL HwGetWindowHandleData(HWND hwnd, DWORD *pdwUserData)
115{
116 hwnd = hwnd - 1; //we skip handle 0x68000000
117 if((hwnd & 0xFFFF0000) != WNDHANDLE_MAGIC_HIGHWORD) {
118 return FALSE; //unknown window (PM?)
119 }
120 hwnd &= WNDHANDLE_MAGIC_MASK;
121 if(hwnd < MAX_WINDOW_HANDLES) {
122 *pdwUserData = WindowHandleTable[hwnd];
123 return TRUE;
124 }
125 *pdwUserData = 0;
126 return FALSE;
127}
128//******************************************************************************
129//******************************************************************************
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