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annotate druntime/src/gc/basic/gc.d @ 759:d3eb054172f9

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Added copy of druntime from DMD 2.020 modified for LDC.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 11 Nov 2008 01:52:37 +0100
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759
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1 /**
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2 * This module contains the garbage collector front-end.
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3 *
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4 * Copyright: Copyright (C) 2005-2006 Digital Mars, www.digitalmars.com.
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5 * All rights reserved.
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6 * License:
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7 * This software is provided 'as-is', without any express or implied
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8 * warranty. In no event will the authors be held liable for any damages
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9 * arising from the use of this software.
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10 *
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11 * Permission is granted to anyone to use this software for any purpose,
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12 * including commercial applications, and to alter it and redistribute it
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13 * freely, in both source and binary form, subject to the following
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14 * restrictions:
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15 *
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16 * o The origin of this software must not be misrepresented; you must not
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17 * claim that you wrote the original software. If you use this software
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18 * in a product, an acknowledgment in the product documentation would be
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19 * appreciated but is not required.
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20 * o Altered source versions must be plainly marked as such, and must not
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21 * be misrepresented as being the original software.
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22 * o This notice may not be removed or altered from any source
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23 * distribution.
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24 * Authors: Walter Bright, Sean Kelly
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25 */
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26
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27 module gc.gc;
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28
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29 private import gcx;
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30 private import gcstats;
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31 private import stdc.stdlib;
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32
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33 version=GCCLASS;
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34
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35 version (GCCLASS)
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36 alias GC gc_t;
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37 else
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38 alias GC* gc_t;
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39
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40 gc_t _gc;
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41
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42 extern (C) void thread_init();
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43
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44 extern (C) void gc_init()
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45 {
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46 version (GCCLASS)
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47 { void* p;
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48 ClassInfo ci = GC.classinfo;
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49
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50 p = malloc(ci.init.length);
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51 (cast(byte*)p)[0 .. ci.init.length] = ci.init[];
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52 _gc = cast(GC)p;
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53 }
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54 else
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55 {
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56 _gc = cast(GC*) calloc(1, GC.sizeof);
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57 }
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58 _gc.initialize();
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59 // NOTE: The GC must initialize the thread library
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60 // before its first collection.
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61 thread_init();
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62 }
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63
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64 extern (C) void gc_term()
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65 {
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66 // NOTE: There may be daemons threads still running when this routine is
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67 // called. If so, cleaning memory out from under then is a good
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68 // way to make them crash horribly. This probably doesn't matter
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69 // much since the app is supposed to be shutting down anyway, but
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70 // I'm disabling cleanup for now until I can think about it some
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71 // more.
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72 //
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73 // NOTE: Due to popular demand, this has been re-enabled. It still has
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74 // the problems mentioned above though, so I guess we'll see.
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75 _gc.fullCollectNoStack(); // not really a 'collect all' -- still scans
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76 // static data area, roots, and ranges.
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77 _gc.Dtor();
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78 }
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79
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80 extern (C) void gc_enable()
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81 {
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82 _gc.enable();
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83 }
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84
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85 extern (C) void gc_disable()
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86 {
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87 _gc.disable();
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88 }
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89
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90 extern (C) void gc_collect()
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91 {
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92 _gc.fullCollect();
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93 }
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94
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95
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96 extern (C) void gc_minimize()
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97 {
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98 _gc.minimize();
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99 }
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100
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101 extern (C) uint gc_getAttr( void* p )
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102 {
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103 return _gc.getAttr( p );
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104 }
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105
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106 extern (C) uint gc_setAttr( void* p, uint a )
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107 {
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108 return _gc.setAttr( p, a );
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109 }
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110
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111 extern (C) uint gc_clrAttr( void* p, uint a )
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112 {
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113 return _gc.clrAttr( p, a );
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114 }
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115
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116 extern (C) void* gc_malloc( size_t sz, uint ba = 0 )
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117 {
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118 return _gc.malloc( sz, ba );
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119 }
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120
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121 extern (C) void* gc_calloc( size_t sz, uint ba = 0 )
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122 {
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123 return _gc.calloc( sz, ba );
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124 }
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125
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126 extern (C) void* gc_realloc( void* p, size_t sz, uint ba = 0 )
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127 {
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128 return _gc.realloc( p, sz, ba );
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129 }
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130
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131 extern (C) size_t gc_extend( void* p, size_t mx, size_t sz )
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132 {
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133 return _gc.extend( p, mx, sz );
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134 }
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135
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136 extern (C) size_t gc_reserve( size_t sz )
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137 {
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138 return _gc.reserve( sz );
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139 }
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140
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141 extern (C) void gc_free( void* p )
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142 {
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143 _gc.free( p );
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144 }
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145
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146 extern (C) void* gc_addrOf( void* p )
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147 {
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148 return _gc.addrOf( p );
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149 }
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150
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151 extern (C) size_t gc_sizeOf( void* p )
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152 {
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153 return _gc.sizeOf( p );
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154 }
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155
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156 extern (C) BlkInfo gc_query( void* p )
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157 {
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158 return _gc.query( p );
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159 }
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160
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161 // NOTE: This routine is experimental. The stats or function name may change
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162 // before it is made officially available.
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163 extern (C) GCStats gc_stats()
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164 {
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165 GCStats stats = void;
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166 _gc.getStats( stats );
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167 return stats;
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168 }
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169
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170 extern (C) void gc_addRoot( void* p )
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171 {
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172 _gc.addRoot( p );
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173 }
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174
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175 extern (C) void gc_addRange( void* p, size_t sz )
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176 {
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177 _gc.addRange( p, sz );
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178 }
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179
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180 extern (C) void gc_removeRoot( void *p )
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181 {
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182 _gc.removeRoot( p );
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183 }
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184
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185 extern (C) void gc_removeRange( void *p )
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186 {
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187 _gc.removeRange( p );
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188 }
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189
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190 extern (C) void* gc_getHandle()
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191 {
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192 return cast(void*)_gc;
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193 }
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194
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195 extern (C) void gc_setHandle(void* p)
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196 {
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197 void* oldp = gc_getHandle();
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198 gc_t g = cast(gc_t)p;
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199 if (g.gcversion != gcx.GCVERSION)
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200 throw new Error("incompatible gc versions");
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201
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202 // Add our static data to the new gc
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203 GC.scanStaticData(g);
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204
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205 _gc = g;
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206 }
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207
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208 extern (C) void gc_endHandle()
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209 {
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210 GC.unscanStaticData(_gc);
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211 }