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annotate lphobos/gc/win32.d @ 883:b52d5de7783f

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GC defines and linkage changes.
author Christian Kamm <kamm incasoftware de>
date Thu, 08 Jan 2009 18:20:02 +0100
parents 373489eeaf90
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 // Copyright (C) 2001-2002 by Digital Mars
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3 // All Rights Reserved
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4 // www.digitalmars.com
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5 // Written by Walter Bright
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6
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7 import std.c.windows.windows;
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8
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9 alias int pthread_t;
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10
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11 /***********************************
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12 * Map memory.
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13 */
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14
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15 void *os_mem_map(uint nbytes)
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16 {
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17 return VirtualAlloc(null, nbytes, MEM_RESERVE, PAGE_READWRITE);
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18 }
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19
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20 /***********************************
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21 * Commit memory.
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22 * Returns:
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23 * 0 success
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24 * !=0 failure
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25 */
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26
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27 int os_mem_commit(void *base, uint offset, uint nbytes)
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28 {
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29 void *p;
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30
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31 p = VirtualAlloc(base + offset, nbytes, MEM_COMMIT, PAGE_READWRITE);
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32 return cast(int)(p == null);
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33 }
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34
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35
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36 /***********************************
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37 * Decommit memory.
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38 * Returns:
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39 * 0 success
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40 * !=0 failure
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41 */
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42
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43 int os_mem_decommit(void *base, uint offset, uint nbytes)
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44 {
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45 return cast(int)VirtualFree(base + offset, nbytes, MEM_DECOMMIT) == 0;
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46 }
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47
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48 /***********************************
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49 * Unmap memory allocated with os_mem_map().
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50 * Memory must have already been decommitted.
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51 * Returns:
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52 * 0 success
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53 * !=0 failure
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54 */
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55
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56 int os_mem_unmap(void *base, uint nbytes)
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57 {
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58 return cast(int)VirtualFree(base, 0, MEM_RELEASE) == 0;
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59 }
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60
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61
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62 /********************************************
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63 */
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64
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65 pthread_t pthread_self()
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66 {
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67 //printf("pthread_self() = %x\n", GetCurrentThreadId());
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68 return cast(pthread_t) GetCurrentThreadId();
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69 }
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70
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71 /**********************************************
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72 * Determine "bottom" of stack (actually the top on Win32 systems).
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73 */
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74
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75 void *os_query_stackBottom()
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76 {
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77 asm
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78 {
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79 naked ;
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80 mov EAX,FS:4 ;
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81 ret ;
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82 }
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83 }
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84
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85 /**********************************************
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86 * Determine base address and size of static data segment.
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87 */
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88
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89 version (GNU)
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90 {
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91 // This is MinGW specific
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92 extern (C)
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93 {
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94 // TODO: skip the .rdata between .data and .bss?
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95 extern int _data_start__;
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96 extern int _bss_end__;
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97 }
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98
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99 void os_query_staticdataseg(void **base, uint *nbytes)
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100 {
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101 *base = cast(void *)&_data_start__;
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102 *nbytes = cast(uint)(cast(char *)&_bss_end__ - cast(char *)&_data_start__);
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103 }
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104
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105 }
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106 else
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107 {
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108
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109 extern (C)
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110 {
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111 extern int _xi_a; // &_xi_a just happens to be start of data segment
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112 extern int _edata; // &_edata is start of BSS segment
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113 extern int _end; // &_end is past end of BSS
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114 }
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115
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116 void os_query_staticdataseg(void **base, uint *nbytes)
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117 {
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118 *base = cast(void *)&_xi_a;
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119 *nbytes = cast(uint)(cast(char *)&_end - cast(char *)&_xi_a);
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120 }
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121
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122 }
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123 /++++
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124
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125 void os_query_staticdataseg(void **base, uint *nbytes)
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126 {
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127 static char dummy = 6;
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128 SYSTEM_INFO si;
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129 MEMORY_BASIC_INFORMATION mbi;
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130 char *p;
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131 void *bottom = null;
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132 uint size = 0;
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133
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134 // Tests show the following does not work reliably.
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135 // The reason is that the data segment is arbitrarily divided
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136 // up into PAGE_READWRITE and PAGE_WRITECOPY.
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137 // This means there are multiple regions to query, and
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138 // can even wind up including the code segment.
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139 assert(0); // fix implementation
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140
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141 GetSystemInfo(&si);
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142 p = (char *)((uint)(&dummy) & ~(si.dwPageSize - 1));
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143 while (VirtualQuery(p, &mbi, sizeof(mbi)) == sizeof(mbi) &&
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144 mbi.Protect & (PAGE_READWRITE | PAGE_WRITECOPY) &&
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145 !(mbi.Protect & PAGE_GUARD) &&
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146 mbi.AllocationBase != 0)
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147 {
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148 bottom = (void *)mbi.BaseAddress;
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149 size = (uint)mbi.RegionSize;
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150
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151 printf("dwPageSize = x%x\n", si.dwPageSize);
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152 printf("&dummy = %p\n", &dummy);
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153 printf("BaseAddress = %p\n", mbi.BaseAddress);
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154 printf("AllocationBase = %p\n", mbi.AllocationBase);
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155 printf("AllocationProtect = x%x\n", mbi.AllocationProtect);
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156 printf("RegionSize = x%x\n", mbi.RegionSize);
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157 printf("State = x%x\n", mbi.State);
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158 printf("Protect = x%x\n", mbi.Protect);
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159 printf("Type = x%x\n\n", mbi.Type);
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160
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161 p -= si.dwPageSize;
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162 }
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163
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164 *base = bottom;
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165 *nbytes = size;
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166 }
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167
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168 ++++/