Mercurial > projects > ldc
annotate lphobos/std/mmfile.d @ 528:3197ffdc2811
Fixed problem with parameterized intrinsics taking bools.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
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date | Wed, 20 Aug 2008 19:01:56 +0200 |
parents | 373489eeaf90 |
children | 88e23f8c2354 |
rev | line source |
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473
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1 /* Copyright 2004-2005 by Digital Mars |
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2 * Written by Walter Bright and Matthew Wilson |
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3 * |
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4 * This software is provided 'as-is', without any express or implied |
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5 * warranty. In no event will the authors be held liable for any damages |
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6 * arising from the use of this software. |
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7 * |
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8 * Permission is granted to anyone to use this software for any purpose, |
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9 * including commercial applications, and to alter it and redistribute it |
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10 * freely, in both source and binary form, subject to the following |
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11 * restrictions: |
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12 * |
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13 * - The origin of this software must not be misrepresented; you must not |
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14 * claim that you wrote the original software. If you use this software |
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15 * in a product, an acknowledgment in the product documentation would be |
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16 * appreciated but is not required. |
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17 * - Altered source versions must be plainly marked as such, and must not |
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18 * be misrepresented as being the original software. |
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19 * - This notice may not be removed or altered from any source |
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20 * distribution. |
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21 * |
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22 */ |
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23 |
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24 /** |
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25 * Read and write memory mapped files. |
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26 * Macros: |
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27 * WIKI=Phobos/StdMmfile |
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28 */ |
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29 |
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30 /* NOTE: This file has been patched from the original DMD distribution to |
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31 work with the GDC compiler. |
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32 |
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33 Modified by David Friedman, September 2004 |
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34 */ |
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35 |
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36 module std.mmfile; |
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37 |
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38 private import std.c.stdio; |
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39 private import std.c.stdlib; |
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40 private import std.string; |
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41 |
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42 //debug = MMFILE; |
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43 |
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44 version (Win32) |
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45 { |
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46 private import std.c.windows.windows; |
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47 private import std.utf; |
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48 |
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49 private uint dwVersion; |
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50 |
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51 static this() |
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52 { // http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/getversion.asp |
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53 dwVersion = GetVersion(); |
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54 } |
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55 |
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56 private const bool Have_MMFile = true; // private for now... |
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57 } |
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58 else version (Unix) |
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59 { |
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60 version (/*GNU_Unix_Have_MMap*/Unix) |
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61 { |
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62 version(linux) { |
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63 import std.c.linux.linux; |
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64 alias std.c.linux.linux unix; |
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65 } else { |
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66 private import std.c.unix.unix; |
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67 alias std.c.unix.unix unix; |
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68 } |
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69 |
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70 version = unix_mm; |
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71 private const bool Have_MMFile = true; |
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72 } |
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73 else |
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74 { |
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75 private const bool Have_MMFile = false; |
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76 } |
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77 |
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78 } |
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79 else |
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80 { |
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81 private const bool Have_MMFile = false; |
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82 // Can't simply fail because std.stream imports this module. |
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83 //static assert(0); |
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84 } |
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85 |
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86 static if (Have_MMFile) |
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87 { |
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88 private import std.file; |
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89 private import std.path; |
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90 } |
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91 |
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92 /** |
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93 * MmFile objects control the memory mapped file resource. |
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94 */ |
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95 class MmFile |
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96 { |
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97 /** |
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98 * The mode the memory mapped file is opened with. |
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99 */ |
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100 enum Mode |
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101 { Read, /// read existing file |
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102 ReadWriteNew, /// delete existing file, write new file |
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103 ReadWrite, /// read/write existing file, create if not existing |
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104 ReadCopyOnWrite, /// read/write existing file, copy on write |
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105 } |
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106 |
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107 /** |
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108 * Open memory mapped file filename for reading. |
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109 * File is closed when the object instance is deleted. |
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110 * Throws: |
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111 * std.file.FileException |
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112 */ |
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113 this(char[] filename) |
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114 { |
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115 this(filename, Mode.Read, 0, null); |
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116 } |
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117 |
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118 /** |
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119 * Open memory mapped file filename in mode. |
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120 * File is closed when the object instance is deleted. |
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121 * Params: |
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122 * filename = name of the file. |
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123 * If null, an anonymous file mapping is created. |
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124 * mode = access mode defined above. |
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125 * size = the size of the file. If 0, it is taken to be the |
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126 * size of the existing file. |
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127 * address = the preferred address to map the file to, |
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128 * although the system is not required to honor it. |
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129 * If null, the system selects the most convenient address. |
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130 * window = preferred block size of the amount of data to map at one time |
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131 * with 0 meaning map the entire file. The window size must be a |
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132 * multiple of the memory allocation page size. |
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133 * Throws: |
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134 * std.file.FileException |
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135 */ |
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136 this(char[] filename, Mode mode, ulong size, void* address, |
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137 size_t window = 0) |
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138 { |
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139 this.filename = filename; |
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140 this.mMode = mode; |
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141 this.window = window; |
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142 this.address = address; |
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143 |
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144 version (Win32) |
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145 { |
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146 void* p; |
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147 uint dwDesiredAccess2; |
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148 uint dwShareMode; |
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149 uint dwCreationDisposition; |
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150 uint flProtect; |
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151 |
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152 if (dwVersion & 0x80000000 && (dwVersion & 0xFF) == 3) |
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153 { |
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154 throw new FileException(filename, |
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155 "Win32s does not implement mm files"); |
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156 } |
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157 |
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158 switch (mode) |
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159 { |
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160 case Mode.Read: |
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161 dwDesiredAccess2 = GENERIC_READ; |
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162 dwShareMode = FILE_SHARE_READ; |
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163 dwCreationDisposition = OPEN_EXISTING; |
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164 flProtect = PAGE_READONLY; |
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165 dwDesiredAccess = FILE_MAP_READ; |
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166 break; |
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167 |
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168 case Mode.ReadWriteNew: |
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169 assert(size != 0); |
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170 dwDesiredAccess2 = GENERIC_READ | GENERIC_WRITE; |
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171 dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE; |
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172 dwCreationDisposition = CREATE_ALWAYS; |
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173 flProtect = PAGE_READWRITE; |
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174 dwDesiredAccess = FILE_MAP_WRITE; |
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175 break; |
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176 |
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177 case Mode.ReadWrite: |
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178 dwDesiredAccess2 = GENERIC_READ | GENERIC_WRITE; |
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179 dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE; |
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180 dwCreationDisposition = OPEN_ALWAYS; |
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181 flProtect = PAGE_READWRITE; |
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182 dwDesiredAccess = FILE_MAP_WRITE; |
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183 break; |
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184 |
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185 case Mode.ReadCopyOnWrite: |
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186 if (dwVersion & 0x80000000) |
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187 { |
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188 throw new FileException(filename, |
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189 "Win9x does not implement copy on write"); |
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190 } |
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191 dwDesiredAccess2 = GENERIC_READ | GENERIC_WRITE; |
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192 dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE; |
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193 dwCreationDisposition = OPEN_EXISTING; |
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194 flProtect = PAGE_WRITECOPY; |
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195 dwDesiredAccess = FILE_MAP_COPY; |
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196 break; |
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197 |
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198 default: |
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199 assert(0); |
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200 } |
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201 |
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202 if (filename) |
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203 { |
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204 if (useWfuncs) |
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205 { |
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206 auto namez = std.utf.toUTF16z(filename); |
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207 hFile = CreateFileW(namez, |
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208 dwDesiredAccess2, |
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209 dwShareMode, |
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210 null, |
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211 dwCreationDisposition, |
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212 FILE_ATTRIBUTE_NORMAL, |
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213 cast(HANDLE)null); |
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214 } |
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215 else |
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216 { |
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217 auto namez = std.file.toMBSz(filename); |
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218 hFile = CreateFileA(namez, |
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219 dwDesiredAccess2, |
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220 dwShareMode, |
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221 null, |
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222 dwCreationDisposition, |
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223 FILE_ATTRIBUTE_NORMAL, |
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224 cast(HANDLE)null); |
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225 } |
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226 if (hFile == INVALID_HANDLE_VALUE) |
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227 goto err1; |
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228 } |
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229 else |
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230 hFile = null; |
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231 |
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232 int hi = cast(int)(size>>32); |
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233 hFileMap = CreateFileMappingA(hFile, null, flProtect, hi, cast(uint)size, null); |
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234 if (hFileMap == null) // mapping failed |
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235 goto err1; |
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236 |
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237 if (size == 0) |
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238 { |
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|
239 uint sizehi; |
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240 uint sizelow = GetFileSize(hFile,&sizehi); |
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241 size = (cast(ulong)sizehi << 32) + sizelow; |
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242 } |
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243 this.size = size; |
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244 |
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245 size_t initial_map = (window && 2*window<size)? 2*window : cast(size_t)size; |
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246 p = MapViewOfFileEx(hFileMap, dwDesiredAccess, 0, 0, initial_map, address); |
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247 if (!p) goto err1; |
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248 data = p[0 .. initial_map]; |
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249 |
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250 debug (MMFILE) printf("MmFile.this(): p = %p, size = %d\n", p, size); |
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changeset
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251 return; |
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|
252 |
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253 err1: |
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254 if (hFileMap != null) |
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changeset
|
255 CloseHandle(hFileMap); |
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256 hFileMap = null; |
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257 |
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258 if (hFile != INVALID_HANDLE_VALUE) |
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259 CloseHandle(hFile); |
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260 hFile = INVALID_HANDLE_VALUE; |
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261 |
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262 errNo(); |
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263 } |
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264 else version (unix_mm) |
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265 { |
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266 char* namez = toStringz(filename); |
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267 void* p; |
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268 int oflag; |
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269 int fmode; |
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270 |
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271 switch (mode) |
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272 { |
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273 case Mode.Read: |
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274 flags = MAP_SHARED; |
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275 prot = PROT_READ; |
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276 oflag = O_RDONLY; |
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277 fmode = 0; |
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278 break; |
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279 |
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280 case Mode.ReadWriteNew: |
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281 assert(size != 0); |
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282 flags = MAP_SHARED; |
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283 prot = PROT_READ | PROT_WRITE; |
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284 oflag = O_CREAT | O_RDWR | O_TRUNC; |
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285 fmode = 0660; |
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286 break; |
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287 |
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288 case Mode.ReadWrite: |
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289 flags = MAP_SHARED; |
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290 prot = PROT_READ | PROT_WRITE; |
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291 oflag = O_CREAT | O_RDWR; |
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292 fmode = 0660; |
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293 break; |
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294 |
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295 case Mode.ReadCopyOnWrite: |
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296 flags = MAP_PRIVATE; |
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297 prot = PROT_READ | PROT_WRITE; |
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298 oflag = O_RDWR; |
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299 fmode = 0; |
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300 break; |
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301 |
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302 default: |
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303 assert(0); |
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304 } |
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305 |
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306 if (filename.length) |
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307 { |
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308 struct_stat statbuf; |
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309 |
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310 fd = unix.open(namez, oflag, fmode); |
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311 if (fd == -1) |
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312 { |
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313 // printf("\topen error, errno = %d\n",getErrno()); |
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314 errNo(); |
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315 } |
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316 |
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317 if (unix.fstat(fd, &statbuf)) |
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318 { |
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319 //printf("\tfstat error, errno = %d\n",getErrno()); |
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320 unix.close(fd); |
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321 errNo(); |
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322 } |
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323 |
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324 if (prot & PROT_WRITE && size > statbuf.st_size) |
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325 { |
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326 // Need to make the file size bytes big |
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327 unix.lseek(fd, cast(off_t)(size - 1), SEEK_SET); |
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328 char c = 0; |
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329 unix.write(fd, &c, 1); |
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330 } |
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331 else if (prot & PROT_READ && size == 0) |
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332 size = statbuf.st_size; |
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333 } |
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334 else |
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335 { |
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336 fd = -1; |
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337 flags |= MAP_ANONYMOUS; |
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338 } |
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339 this.size = size; |
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340 size_t initial_map = (window && 2*window<size)? 2*window : cast(size_t)size; |
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341 p = mmap(address, initial_map, prot, flags, fd, 0); |
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342 if (p == MAP_FAILED) { |
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343 if (fd != -1) |
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344 unix.close(fd); |
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345 errNo(); |
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346 } |
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347 |
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348 data = p[0 .. initial_map]; |
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349 } |
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350 else static if (! Have_MMFile) |
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351 { |
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352 throw new FileException("This system does support memory mapped files"); |
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353 } |
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354 else |
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355 { |
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356 static assert(0); |
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357 } |
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358 } |
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359 |
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360 /** |
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361 * Flushes pending output and closes the memory mapped file. |
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362 */ |
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363 ~this() |
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364 { |
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365 debug (MMFILE) printf("MmFile.~this()\n"); |
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366 unmap(); |
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367 version (Win32) |
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368 { |
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369 if (hFileMap != null && CloseHandle(hFileMap) != TRUE) |
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370 errNo(); |
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371 hFileMap = null; |
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372 |
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373 if (hFile != INVALID_HANDLE_VALUE && CloseHandle(hFile) != TRUE) |
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374 errNo(); |
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375 hFile = INVALID_HANDLE_VALUE; |
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376 } |
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377 else version (unix_mm) |
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378 { |
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379 if (fd != -1 && unix.close(fd) == -1) |
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380 errNo(); |
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381 fd = -1; |
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382 } |
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383 else static if (! Have_MMFile) |
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384 { |
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385 } |
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386 else |
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387 { |
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388 static assert(0); |
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389 } |
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390 data = null; |
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391 } |
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392 |
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393 /* Flush any pending output. |
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394 */ |
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395 void flush() |
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396 { |
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397 debug (MMFILE) printf("MmFile.flush()\n"); |
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398 version (Win32) |
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399 { |
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400 FlushViewOfFile(data.ptr, data.length); |
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401 } |
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402 else version (unix_mm) |
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403 { |
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404 int i; |
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405 |
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406 i = msync(cast(void*)data, data.length, MS_SYNC); // sys/mman.h |
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407 if (i != 0) |
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408 errNo(); |
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409 } |
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410 else static if (! Have_MMFile) |
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411 { |
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412 } |
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413 else |
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414 { |
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415 static assert(0); |
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416 } |
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417 } |
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418 |
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419 /** |
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420 * Gives size in bytes of the memory mapped file. |
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421 */ |
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422 ulong length() |
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423 { |
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424 debug (MMFILE) printf("MmFile.length()\n"); |
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425 return size; |
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426 } |
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427 |
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428 /** |
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429 * Read-only property returning the file mode. |
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430 */ |
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431 Mode mode() |
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432 { |
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433 debug (MMFILE) printf("MmFile.mode()\n"); |
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434 return mMode; |
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435 } |
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436 |
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437 /** |
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438 * Returns entire file contents as an array. |
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439 */ |
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440 void[] opSlice() |
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441 { |
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442 debug (MMFILE) printf("MmFile.opSlice()\n"); |
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443 return opSlice(0,size); |
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444 } |
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445 |
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446 /** |
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447 * Returns slice of file contents as an array. |
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448 */ |
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449 void[] opSlice(ulong i1, ulong i2) |
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450 { |
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451 debug (MMFILE) printf("MmFile.opSlice(%lld, %lld)\n", i1, i2); |
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452 ensureMapped(i1,i2); |
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453 size_t off1 = cast(size_t)(i1-start); |
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454 size_t off2 = cast(size_t)(i2-start); |
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455 return data[off1 .. off2]; |
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456 } |
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457 |
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458 /** |
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459 * Returns byte at index i in file. |
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460 */ |
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461 ubyte opIndex(ulong i) |
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462 { |
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463 debug (MMFILE) printf("MmFile.opIndex(%lld)\n", i); |
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464 ensureMapped(i); |
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465 size_t off = cast(size_t)(i-start); |
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466 return (cast(ubyte[])data)[off]; |
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467 } |
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468 |
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469 /** |
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470 * Sets and returns byte at index i in file to value. |
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471 */ |
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472 ubyte opIndexAssign(ubyte value, ulong i) |
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473 { |
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474 debug (MMFILE) printf("MmFile.opIndex(%lld, %d)\n", i, value); |
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475 ensureMapped(i); |
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476 size_t off = cast(size_t)(i-start); |
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477 return (cast(ubyte[])data)[off] = value; |
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478 } |
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479 |
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480 |
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481 // return true if the given position is currently mapped |
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482 private int mapped(ulong i) |
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483 { |
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484 debug (MMFILE) printf("MmFile.mapped(%lld, %lld, %d)\n", i,start, |
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485 data.length); |
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486 return i >= start && i < start+data.length; |
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487 } |
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488 |
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489 // unmap the current range |
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490 private void unmap() |
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491 { |
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492 debug (MMFILE) printf("MmFile.unmap()\n"); |
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493 version(Windows) { |
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494 /* Note that under Windows 95, UnmapViewOfFile() seems to return |
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495 * random values, not TRUE or FALSE. |
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496 */ |
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497 if (data && UnmapViewOfFile(data.ptr) == FALSE && |
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498 (dwVersion & 0x80000000) == 0) |
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499 errNo(); |
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500 } else version (unix_mm) { |
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501 if (data && munmap(cast(void*)data, data.length) != 0) |
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502 errNo(); |
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503 } |
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504 data = null; |
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505 } |
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506 |
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507 // map range |
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508 private void map(ulong start, size_t len) |
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509 { |
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510 debug (MMFILE) printf("MmFile.map(%lld, %d)\n", start, len); |
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511 void* p; |
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512 if (start+len > size) |
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513 len = cast(size_t)(size-start); |
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514 version(Windows) { |
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515 uint hi = cast(uint)(start>>32); |
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516 p = MapViewOfFileEx(hFileMap, dwDesiredAccess, hi, cast(uint)start, len, address); |
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517 if (!p) errNo(); |
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518 } else version (unix_mm) { |
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519 p = mmap(address, len, prot, flags, fd, cast(off_t)start); |
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520 if (p == MAP_FAILED) errNo(); |
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521 } |
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522 data = p[0 .. len]; |
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523 this.start = start; |
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524 } |
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525 |
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526 // ensure a given position is mapped |
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527 private void ensureMapped(ulong i) |
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parents:
diff
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528 { |
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529 debug (MMFILE) printf("MmFile.ensureMapped(%lld)\n", i); |
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530 if (!mapped(i)) { |
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531 unmap(); |
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532 if (window == 0) { |
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533 map(0,cast(size_t)size); |
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534 } else { |
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535 ulong block = i/window; |
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536 if (block == 0) |
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537 map(0,2*window); |
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538 else |
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539 map(window*(block-1),3*window); |
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parents:
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540 } |
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|
541 } |
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|
542 } |
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parents:
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|
543 |
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parents:
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|
544 // ensure a given range is mapped |
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545 private void ensureMapped(ulong i, ulong j) |
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546 { |
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diff
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547 debug (MMFILE) printf("MmFile.ensureMapped(%lld, %lld)\n", i, j); |
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548 if (!mapped(i) || !mapped(j-1)) { |
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parents:
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549 unmap(); |
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550 if (window == 0) { |
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parents:
diff
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|
551 map(0,cast(size_t)size); |
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parents:
diff
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552 } else { |
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parents:
diff
changeset
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553 ulong iblock = i/window; |
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parents:
diff
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554 ulong jblock = (j-1)/window; |
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555 if (iblock == 0) { |
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556 map(0,cast(size_t)(window*(jblock+2))); |
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557 } else { |
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parents:
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558 map(window*(iblock-1),cast(size_t)(window*(jblock-iblock+3))); |
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parents:
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559 } |
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parents:
diff
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560 } |
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parents:
diff
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|
561 } |
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parents:
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|
562 } |
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parents:
diff
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|
563 |
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parents:
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564 private: |
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|
565 char[] filename; |
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566 void[] data; |
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parents:
diff
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|
567 ulong start; |
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parents:
diff
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|
568 size_t window; |
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Applied downs' lphobos update
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parents:
diff
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|
569 ulong size; |
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diff
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|
570 Mode mMode; |
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parents:
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571 void* address; |
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parents:
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|
572 |
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parents:
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|
573 version (Win32) |
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parents:
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|
574 { |
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parents:
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575 HANDLE hFile = INVALID_HANDLE_VALUE; |
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576 HANDLE hFileMap = null; |
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|
577 uint dwDesiredAccess; |
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|
578 } |
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|
579 else version (unix_mm) |
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parents:
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|
580 { |
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parents:
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581 int fd; |
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parents:
diff
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|
582 int prot; |
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parents:
diff
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|
583 int flags; |
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parents:
diff
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|
584 int fmode; |
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parents:
diff
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|
585 } |
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parents:
diff
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|
586 else static if (! Have_MMFile) |
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parents:
diff
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|
587 { |
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parents:
diff
changeset
|
588 } |
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parents:
diff
changeset
|
589 else |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
590 { |
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Applied downs' lphobos update
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parents:
diff
changeset
|
591 static assert(0); |
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parents:
diff
changeset
|
592 } |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
593 |
373489eeaf90
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parents:
diff
changeset
|
594 // Report error, where errno gives the error number |
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parents:
diff
changeset
|
595 void errNo() |
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parents:
diff
changeset
|
596 { |
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Applied downs' lphobos update
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parents:
diff
changeset
|
597 version (Win32) |
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parents:
diff
changeset
|
598 { |
373489eeaf90
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parents:
diff
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|
599 throw new FileException(filename, GetLastError()); |
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diff
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|
600 } |
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Applied downs' lphobos update
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parents:
diff
changeset
|
601 else version (Unix) |
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Applied downs' lphobos update
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parents:
diff
changeset
|
602 { |
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Applied downs' lphobos update
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|
603 throw new FileException(filename, getErrno()); |
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Applied downs' lphobos update
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diff
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|
604 } |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
605 else static if (! Have_MMFile) |
373489eeaf90
Applied downs' lphobos update
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diff
changeset
|
606 { |
373489eeaf90
Applied downs' lphobos update
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changeset
|
607 throw new FileException(filename, "MMFile unsupported"); |
373489eeaf90
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parents:
diff
changeset
|
608 } |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
609 else |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
610 { |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
611 static assert(0); |
373489eeaf90
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parents:
diff
changeset
|
612 } |
373489eeaf90
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parents:
diff
changeset
|
613 } |
373489eeaf90
Applied downs' lphobos update
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parents:
diff
changeset
|
614 } |
373489eeaf90
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parents:
diff
changeset
|
615 |
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|
616 unittest { |
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|
617 static if (Have_MMFile) |
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|
618 { |
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|
619 const size_t K = 1024; |
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620 size_t win = 64*K; // assume the page size is 64K |
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|
621 version(Win32) { |
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|
622 /+ these aren't defined in std.c.windows.windows so let's use the default |
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|
623 SYSTEM_INFO sysinfo; |
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changeset
|
624 GetSystemInfo(&sysinfo); |
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|
625 win = sysinfo.dwAllocationGranularity; |
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|
626 +/ |
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|
627 } else version (Unix) { |
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|
628 // getpagesize() is not defined in the unix D headers so use the guess |
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parents:
diff
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|
629 } |
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|
630 MmFile mf = new MmFile("testing.txt",MmFile.Mode.ReadWriteNew,100*K,null,win); |
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|
631 ubyte[] str = cast(ubyte[])"1234567890"; |
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parents:
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|
632 ubyte[] data = cast(ubyte[])mf[0 .. 10]; |
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changeset
|
633 data[] = str[]; |
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changeset
|
634 assert( mf[0 .. 10] == str ); |
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|
635 data = cast(ubyte[])mf[50 .. 60]; |
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diff
changeset
|
636 data[] = str[]; |
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diff
changeset
|
637 assert( mf[50 .. 60] == str ); |
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diff
changeset
|
638 ubyte[] data2 = cast(ubyte[])mf[20*K .. 60*K]; |
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|
639 assert( data2.length == 40*K ); |
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|
640 assert( data2[length-1] == 0 ); |
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|
641 mf[100*K-1] = cast(ubyte)'b'; |
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changeset
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642 data2 = cast(ubyte[])mf[21*K .. 100*K]; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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643 assert( data2.length == 79*K ); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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644 assert( data2[length-1] == 'b' ); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
645 delete mf; |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
646 std.file.remove("testing.txt"); |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
647 } |
373489eeaf90
Applied downs' lphobos update
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
648 } |