source: trunk/src/kernel32/hmmmap.cpp@ 5011

Last change on this file since 5011 was 5011, checked in by sandervl, 25 years ago

memory map + handle manager fixes
File size: 8.3 KB
Line 
1/* $Id: hmmmap.cpp,v 1.16 2001-01-22 18:26:51 sandervl Exp $ */
2
3/*
4 * Project Odin Software License can be found in LICENSE.TXT
5 * Win32 Unified Handle Manager for OS/2
6 * Copyright 1999 Patrick Haller (haller@zebra.fh-weingarten.de)
7 */
8
9#undef DEBUG_LOCAL
10//#define DEBUG_LOCAL
11
12
13/*****************************************************************************
14 * Remark *
15 *****************************************************************************
16
17 */
18
19
20/*****************************************************************************
21 * Includes *
22 *****************************************************************************/
23
24#include <os2win.h>
25#include <stdlib.h>
26#include <string.h>
27#include "unicode.h"
28#include "misc.h"
29
30#include "HandleManager.H"
31#include "HMMMap.h"
32#include "mmap.h"
33#include "heapshared.h"
34
35#define DBG_LOCALLOG DBG_hmmmap
36#include "dbglocal.h"
37
38/*****************************************************************************
39 * Defines *
40 *****************************************************************************/
41
42/*****************************************************************************
43 * Structures *
44 *****************************************************************************/
45
46/*****************************************************************************
47 * Local Prototypes *
48 *****************************************************************************/
49
50//******************************************************************************
51//******************************************************************************
52DWORD HMDeviceMemMapClass::CreateFileMapping(PHMHANDLEDATA pHMHandleData,
53 HFILE hFile,
54 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
55 DWORD protect, /* [in] Protection for mapping object */
56 DWORD size_high, /* [in] High-order 32 bits of object size */
57 DWORD size_low, /* [in] Low-order 32 bits of object size */
58 LPCSTR name) /* [in] Name of file-mapping object */
59{
60 Win32MemMap *map;
61
62 if((hFile == -1 && size_low == 0) || size_high ||
63 protect & ~(PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY|SEC_COMMIT|SEC_IMAGE|SEC_RESERVE|SEC_NOCACHE) ||
64 (protect & (PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY)) == 0 ||
65// (hFile == -1 && (protect & SEC_COMMIT)) ||
66 ((protect & SEC_COMMIT) && (protect & SEC_RESERVE)))
67 {
68
69 dprintf(("CreateFileMappingA: invalid parameter (combination)!"));
70 dprintf(("Parameters: %x %x %x %x %s", hFile, protect, size_high, size_low, name));
71 return ERROR_INVALID_PARAMETER;
72 }
73
74 map = Win32MemMap::findMap((LPSTR)name);
75 if(map != NULL) {
76 dprintf(("CreateFileMappingA: duplicating map %s!", name));
77
78 DWORD protflags = map->getProtFlags();
79 switch(protect) {
80 case FILE_MAP_WRITE:
81 if(!(protflags & PAGE_WRITECOPY))
82 dprintf(("Different flags for duplicate!"));
83 break;
84 case FILE_MAP_READ:
85 if(!(protflags & (PAGE_READWRITE | PAGE_READONLY)))
86 dprintf(("Different flags for duplicate!"));
87 break;
88 case FILE_MAP_COPY:
89 if(!(protflags & PAGE_WRITECOPY))
90 dprintf(("Different flags for duplicate!"));
91 break;
92 }
93 //TODO:
94 //Is it allowed to open an existing view with different flags?
95 //(i.e. write access to readonly object)
96 dprintf(("CreateFileMapping: duplicate handle of existing file mapping %s", name));
97
98 //if map already exists, we must create a new handle to the existing
99 //map object and return ERROR_ALREADY_EXISTS
100 map->AddRef();
101 pHMHandleData->dwUserData = (ULONG)map;
102 pHMHandleData->dwInternalType = HMTYPE_MEMMAP;
103 return ERROR_ALREADY_EXISTS;
104 }
105 else {
106 map = new Win32MemMap(hFile, size_low, protect, (LPSTR)name);
107
108 if(map == NULL) {
109 dprintf(("CreateFileMappingA: can't create Win32MemMap object!"));
110 return ERROR_OUTOFMEMORY;
111 }
112
113 if(map->Init() == FALSE) {
114 dprintf(("CreateFileMappingA: init failed!"));
115 delete map;
116 return ERROR_GEN_FAILURE;
117 }
118 }
119 map->AddRef();
120 pHMHandleData->dwUserData = (ULONG)map;
121 pHMHandleData->dwInternalType = HMTYPE_MEMMAP;
122 return NO_ERROR;
123}
124//******************************************************************************
125//******************************************************************************
126DWORD HMDeviceMemMapClass::OpenFileMapping(PHMHANDLEDATA pHMHandleData,
127 DWORD access, /* [in] Access mode */
128 BOOL inherit, /* [in] Inherit flag */
129 LPCSTR name ) /* [in] Name of file-mapping object */
130{
131 Win32MemMap *map;
132 DWORD protflags;
133
134 if(name == NULL)
135 return ERROR_INVALID_PARAMETER;
136
137 map = Win32MemMap::findMap((LPSTR)name);
138 if(map == NULL) {
139 dprintf(("OpenFileMapping: mapping %s not found", name));
140 return ERROR_FILE_NOT_FOUND;
141 }
142 protflags = map->getProtFlags();
143 switch(access) {
144 case FILE_MAP_WRITE:
145 case FILE_MAP_ALL_ACCESS:
146 if(!(protflags & PAGE_WRITECOPY))
147 return ERROR_INVALID_PARAMETER;
148 break;
149 case FILE_MAP_READ:
150 if(!(protflags & (PAGE_READWRITE | PAGE_READONLY)))
151 return ERROR_INVALID_PARAMETER;
152 break;
153 case FILE_MAP_COPY:
154 if(!(protflags & PAGE_WRITECOPY))
155 return ERROR_INVALID_PARAMETER;
156 break;
157 }
158 map->AddRef();
159 pHMHandleData->dwUserData = (ULONG)map;
160 pHMHandleData->dwInternalType = HMTYPE_MEMMAP;
161 return NO_ERROR;
162}
163//******************************************************************************
164//******************************************************************************
165LPVOID HMDeviceMemMapClass::MapViewOfFileEx(PHMHANDLEDATA pHMHandleData,
166 DWORD dwDesiredAccess,
167 DWORD dwFileOffsetHigh,
168 DWORD dwFileOffsetLow,
169 DWORD dwNumberOfBytesToMap,
170 LPVOID lpBaseAddress)
171{
172 Win32MemMap *map;
173
174 dprintf(("KERNEL32: HMDeviceMemMapClass::MapViewOfFileEx(%08xh,%08xh,%08xh,%08xh,%08xh,%08xh)\n",
175 pHMHandleData->hHMHandle,
176 dwDesiredAccess,
177 dwFileOffsetHigh,
178 dwFileOffsetLow,
179 dwNumberOfBytesToMap,
180 lpBaseAddress));
181
182 if(lpBaseAddress != NULL)
183 {
184#if 0
185 //No can do. Let us choose the address
186 dprintf(("Can't create view to virtual address %x", lpBaseAddress));
187 SetLastError(ERROR_OUTOFMEMORY);
188 return NULL;
189#else
190 // PH 2000/05/24 IBM VAJ3 uses this function.
191 // I don't think we'll ever succeed in EXACTLY copying the original
192 // behaviour of the function. Maybe ignoring the base address helps?
193 dprintf(("WARNING: suggested virtual address %x IGNORED! (experimental API violation)",
194 lpBaseAddress));
195#endif
196 }
197
198 if(pHMHandleData->dwUserData == NULL || pHMHandleData->dwInternalType != HMTYPE_MEMMAP) {
199 dprintf(("MapViewOfFileEx: invalid handle data!"));
200 SetLastError(ERROR_INVALID_HANDLE);
201 return NULL;
202 }
203 map = (Win32MemMap *)pHMHandleData->dwUserData;
204
205 return map->mapViewOfFile(dwNumberOfBytesToMap, dwFileOffsetLow, dwDesiredAccess);
206}
207//******************************************************************************
208//******************************************************************************
209DWORD HMDeviceMemMapClass::CloseHandle(PHMHANDLEDATA pHMHandleData)
210{
211 Win32MemMap *map;
212
213 dprintf(("HMDeviceMemMapClass::CloseHandle %x", pHMHandleData->dwUserData));
214 if(pHMHandleData->dwUserData == NULL || pHMHandleData->dwInternalType != HMTYPE_MEMMAP) {
215 dprintf(("MapViewOfFileEx: invalid handle data!"));
216 return ERROR_INVALID_HANDLE;
217 }
218 //Although an application may close the file handle used to create a file
219 //mapping object, the system keeps the corresponding file open until the last
220 //view of the file is unmapped.
221 map = (Win32MemMap *)pHMHandleData->dwUserData;
222 map->Release();
223
224 return NO_ERROR;
225}
226//******************************************************************************
227//******************************************************************************
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