source: trunk/src/kernel32/hmmmap.cpp@ 695

Last change on this file since 695 was 690, checked in by sandervl, 26 years ago

handle manager changes for DuplicateHandle + memory mapped file changes/bugfixes
File size: 6.4 KB
Line 
1/* $Id: hmmmap.cpp,v 1.5 1999-08-25 14:27:06 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
34/*****************************************************************************
35 * Defines *
36 *****************************************************************************/
37
38/*****************************************************************************
39 * Structures *
40 *****************************************************************************/
41
42/*****************************************************************************
43 * Local Prototypes *
44 *****************************************************************************/
45
46//******************************************************************************
47//******************************************************************************
48DWORD HMDeviceMemMapClass::CreateFileMapping(PHMHANDLEDATA pHMHandleData,
49 HFILE hFile,
50 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
51 DWORD protect, /* [in] Protection for mapping object */
52 DWORD size_high, /* [in] High-order 32 bits of object size */
53 DWORD size_low, /* [in] Low-order 32 bits of object size */
54 LPCSTR name) /* [in] Name of file-mapping object */
55{
56 Win32MemMap *map;
57
58 if((hFile == -1 && size_low == 0) || size_high ||
59 protect & ~(PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY|SEC_COMMIT|SEC_IMAGE|SEC_RESERVE|SEC_NOCACHE) ||
60 (protect & (PAGE_READONLY|PAGE_READWRITE|PAGE_WRITECOPY)) == 0 ||
61 (hFile == -1 && (protect & SEC_COMMIT)) ||
62 ((protect & SEC_COMMIT) && (protect & SEC_RESERVE)))
63 {
64
65 dprintf(("CreateFileMappingA: invalid parameter (combination)!"));
66 return ERROR_INVALID_PARAMETER;
67 }
68
69 map = new Win32MemMap(hFile, size_low, protect, (LPSTR)name);
70 if(map == NULL) {
71 dprintf(("CreateFileMappingA: can't create Win32MemMap object!"));
72 return ERROR_OUTOFMEMORY;
73 }
74
75 if(map->Init(pHMHandleData->hHMHandle) == FALSE) {
76 delete map;
77 return ERROR_GEN_FAILURE;
78 }
79 map->AddRef();
80 pHMHandleData->dwUserData = (ULONG)map;
81 pHMHandleData->dwInternalType = HMTYPE_MEMMAP;
82 return NO_ERROR;
83}
84//******************************************************************************
85//******************************************************************************
86DWORD HMDeviceMemMapClass::OpenFileMapping(PHMHANDLEDATA pHMHandleData,
87 DWORD access, /* [in] Access mode */
88 BOOL inherit, /* [in] Inherit flag */
89 LPCSTR name ) /* [in] Name of file-mapping object */
90{
91 Win32MemMap *map;
92 DWORD protflags;
93
94 if(name == NULL)
95 return ERROR_INVALID_PARAMETER;
96
97 map = Win32MemMap::findMap((LPSTR)name);
98 if(map == NULL) {
99 dprintf(("OpenFileMapping: mapping %s not found", name));
100 return ERROR_FILE_NOT_FOUND;
101 }
102 protflags = map->getProtFlags();
103 switch(access) {
104 case FILE_MAP_WRITE:
105 case FILE_MAP_ALL_ACCESS:
106 if(!(protflags & PAGE_WRITECOPY))
107 return ERROR_INVALID_PARAMETER;
108 break;
109 case FILE_MAP_READ:
110 if(!(protflags & (PAGE_READWRITE | PAGE_READONLY)))
111 return ERROR_INVALID_PARAMETER;
112 break;
113 case FILE_MAP_COPY:
114 if(!(protflags & PAGE_WRITECOPY))
115 return ERROR_INVALID_PARAMETER;
116 break;
117 }
118 map->AddRef();
119 pHMHandleData->dwUserData = (ULONG)map;
120 pHMHandleData->dwInternalType = HMTYPE_MEMMAP;
121 return NO_ERROR;
122}
123//******************************************************************************
124//******************************************************************************
125LPVOID HMDeviceMemMapClass::MapViewOfFileEx(PHMHANDLEDATA pHMHandleData,
126 DWORD dwDesiredAccess,
127 DWORD dwFileOffsetHigh,
128 DWORD dwFileOffsetLow,
129 DWORD dwNumberOfBytesToMap,
130 LPVOID lpBaseAddress)
131{
132 Win32MemMap *map;
133
134 dprintf(("KERNEL32: HMDeviceMemMapClass::MapViewOfFile(%08xh,%08xh,%08xh,%08xh,%08xh,%08xh)\n",
135 pHMHandleData->hHMHandle,
136 dwDesiredAccess,
137 dwFileOffsetHigh,
138 dwFileOffsetLow,
139 dwNumberOfBytesToMap, lpBaseAddress));
140
141 if(lpBaseAddress != NULL) {//No can do. Let us choose the address
142 dprintf(("Can't create view to virtual address %x", lpBaseAddress));
143 SetLastError(ERROR_OUTOFMEMORY);
144 return NULL;
145 }
146
147 if(pHMHandleData->dwUserData == NULL || pHMHandleData->dwInternalType != HMTYPE_MEMMAP) {
148 dprintf(("MapViewOfFileEx: invalid handle data!"));
149 SetLastError(ERROR_INVALID_HANDLE);
150 return NULL;
151 }
152 map = (Win32MemMap *)pHMHandleData->dwUserData;
153
154 return map->mapViewOfFile(dwNumberOfBytesToMap, dwFileOffsetLow, dwDesiredAccess);
155}
156//******************************************************************************
157//******************************************************************************
158DWORD HMDeviceMemMapClass::CloseHandle(PHMHANDLEDATA pHMHandleData)
159{
160 Win32MemMap *map;
161
162 if(pHMHandleData->dwUserData == NULL || pHMHandleData->dwInternalType != HMTYPE_MEMMAP) {
163 dprintf(("MapViewOfFileEx: invalid handle data!"));
164 return ERROR_INVALID_HANDLE;
165 }
166 map = (Win32MemMap *)pHMHandleData->dwUserData;
167 map->Release();
168
169 return NO_ERROR;
170}
171//******************************************************************************
172//******************************************************************************
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