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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1292 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 2259 $ |
9 | |||
10 | |||
276 | serge | 11 | ; Small heap based on malloc/free/realloc written by Doug Lea |
12 | ; Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
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13 | ; Source ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
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14 | ; License http://creativecommons.org/licenses/publicdomain. |
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15 | |||
16 | |||
17 | ; eax= size |
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18 | |||
19 | ; temp |
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20 | ; esi= nb |
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21 | ; ebx= idx |
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22 | ; |
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2130 | serge | 23 | align 4 |
276 | serge | 24 | malloc: |
25 | push esi |
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26 | |||
27 | ; nb = ((size+7)&~7)+8; |
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28 | |||
29 | mov esi, eax ;size |
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30 | add esi, 7 |
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31 | and esi, -8 |
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32 | add esi, 8 |
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33 | |||
2130 | serge | 34 | mov ecx, mst.mutex |
35 | call mutex_lock |
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276 | serge | 36 | |
37 | cmp esi, 256 |
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38 | jae .large |
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39 | |||
40 | mov ecx, esi |
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326 | serge | 41 | shr ecx, 3 |
276 | serge | 42 | or eax, -1 |
43 | shl eax, cl |
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44 | and eax, [mst.smallmap] |
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45 | jz .small |
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46 | |||
47 | push ebp |
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48 | push edi |
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49 | |||
50 | bsf eax, eax |
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51 | mov ebx, eax |
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52 | |||
53 | ; psize= idx<<3; |
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54 | ; B = &ms.smallbins[idx]; |
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55 | ; p = B->fd; |
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56 | ; F = p->fd; |
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57 | ; rsize= psize-nb; |
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58 | |||
59 | lea ebp, [eax*8] ;ebp= psize |
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60 | shl eax, 4 |
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61 | lea edi, [mst.smallbins+eax] ;edi= B |
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62 | mov edx, [edi+8] ;edx= p |
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63 | mov eax, [edx+8] ;eax= F |
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64 | mov ecx, ebp |
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65 | sub ecx, esi ;ecx= rsize |
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66 | |||
67 | ; if (B == F) |
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68 | cmp edi, eax |
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69 | jne @F |
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70 | |||
71 | btr [mst.smallmap], ebx |
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72 | @@: |
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73 | |||
74 | ; B->fd = F; |
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75 | ; F->bk = B; |
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76 | ; if(rsize<16) |
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77 | |||
78 | cmp ecx, 16 |
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79 | mov [edi+8], eax |
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80 | mov [eax+12], edi |
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81 | jae .split |
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82 | |||
83 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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84 | ; (p + psize)->head |= PINUSE_BIT; |
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85 | |||
86 | lea eax, [edx+8] |
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87 | or dword [edx+ebp+4], 1 |
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88 | |||
89 | or ebp, 3 |
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90 | mov [edx+4], ebp |
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91 | |||
92 | pop edi |
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93 | pop ebp |
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94 | .done: |
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2130 | serge | 95 | mov esi, eax |
96 | mov ecx, mst.mutex |
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97 | call mutex_unlock |
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98 | mov eax, esi |
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276 | serge | 99 | pop esi |
100 | ret |
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2130 | serge | 101 | |
276 | serge | 102 | .split: |
103 | lea ebx, [edx+8] ;ebx=mem |
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104 | |||
105 | ; r = chunk_plus_offset(p, nb); |
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106 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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107 | ; r->head = rsize|PINUSE_BIT; |
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108 | |||
109 | lea eax, [edx+esi] ;eax= r |
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110 | or esi, 3 |
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111 | mov [edx+4], esi |
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112 | |||
113 | mov edx, ecx |
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114 | or edx, 1 |
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115 | mov [eax+4], edx |
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116 | |||
117 | ; (r + rsize)->prev_foot = rsize; |
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118 | |||
119 | mov [eax+ecx], ecx |
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120 | |||
121 | ; I = rsize>>3; |
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122 | |||
123 | shr ecx, 3 |
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124 | |||
125 | ; ms.smallmap |= 1<< I; |
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126 | bts [mst.smallmap], ecx |
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127 | |||
128 | ; B = &ms.smallbins[I]; |
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129 | |||
130 | shl ecx, 4 |
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131 | pop edi |
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132 | pop ebp |
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133 | add ecx, mst.smallbins ;ecx= B |
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134 | |||
135 | mov edx, [ecx+8] ; F = B->fd; |
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136 | mov [ecx+8], eax ; B->fd = r; |
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137 | mov [edx+12], eax ; F->bk = r; |
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138 | mov [eax+8], edx ; r->fd = F; |
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139 | mov [eax+12], ecx ; r->bk = B; |
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2130 | serge | 140 | |
276 | serge | 141 | mov eax, ebx |
2130 | serge | 142 | jmp .done |
143 | |||
276 | serge | 144 | .small: |
145 | |||
146 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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1210 | Lrz | 147 | ;;;;;;;;;;; start a change |
148 | mov eax,[mst.treemap] |
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149 | test eax,eax |
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150 | ;;;;;;;;;;; end the change |
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151 | ; cmp [mst.treemap], 0 |
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152 | jz .from_top |
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276 | serge | 153 | mov eax, esi |
154 | call malloc_small |
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155 | test eax, eax |
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156 | jz .from_top |
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2130 | serge | 157 | jmp .done |
158 | |||
276 | serge | 159 | .large: |
160 | |||
161 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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162 | |||
163 | cmp [mst.treemap], 0 |
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164 | je .from_top |
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165 | |||
166 | call malloc_large ;esi= nb |
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167 | test eax, eax |
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168 | jne .done |
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169 | .from_top: |
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170 | |||
171 | ; if (nb < ms.topsize) |
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172 | |||
173 | mov eax, [mst.topsize] |
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174 | cmp esi, eax |
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175 | jae .fail |
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176 | |||
177 | ; rsize = ms.topsize -= nb; |
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178 | ; p = ms.top; |
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179 | |||
180 | mov ecx, [mst.top] |
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181 | sub eax, esi |
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182 | mov [mst.topsize], eax |
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183 | |||
184 | ; r = ms.top = chunk_plus_offset(p, nb); |
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185 | ; r->head = rsize | PINUSE_BIT; |
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186 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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187 | |||
188 | lea edx, [ecx+esi] |
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189 | or eax, 1 |
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190 | mov [mst.top], edx |
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191 | or esi, 3 |
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192 | mov [edx+4], eax |
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193 | mov [ecx+4], esi |
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194 | lea eax, [ecx+8] |
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2130 | serge | 195 | jmp .done |
196 | |||
276 | serge | 197 | .fail: |
198 | xor eax, eax |
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2130 | serge | 199 | jmp .done |
276 | serge | 200 | |
201 | ; param |
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202 | ; eax= mem |
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2130 | serge | 203 | align 4 |
276 | serge | 204 | free: |
2259 | Serge | 205 | test eax, eax |
206 | jz .exit |
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207 | |||
276 | serge | 208 | push edi |
209 | mov edi, eax |
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210 | add edi, -8 |
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211 | |||
212 | ; if(p->head & CINUSE_BIT) |
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213 | |||
214 | test byte [edi+4], 2 |
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215 | je .fail |
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216 | |||
2130 | serge | 217 | mov ecx, mst.mutex |
218 | call mutex_lock |
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276 | serge | 219 | |
220 | ; psize = p->head & (~3); |
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221 | |||
222 | mov eax, [edi+4] |
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223 | push esi |
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224 | mov esi, eax |
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225 | and esi, -4 |
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226 | |||
227 | ; next = chunk_plus_offset(p, psize); |
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228 | ; if(!(p->head & PINUSE_BIT)) |
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229 | |||
230 | test al, 1 |
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231 | lea ebx, [esi+edi] |
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232 | jne .next |
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233 | |||
234 | ; prevsize = p->prev_foot; |
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235 | ; prev=p - prevsize; |
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236 | ; psize += prevsize; |
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237 | ; p = prev; |
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238 | |||
239 | mov ecx, [edi] ;ecx= prevsize |
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240 | add esi, ecx ;esi= psize |
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241 | sub edi, ecx ;edi= p |
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242 | |||
243 | ; if (prevsize < 256) |
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244 | |||
245 | cmp ecx, 256 |
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246 | jae .unlink_large |
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247 | |||
248 | mov eax, [edi+8] ;F = p->fd; |
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249 | mov edx, [edi+12] ;B = p->bk; |
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250 | |||
251 | ; if (F == B) |
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252 | ; ms.smallmap &= ~(1<< I); |
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253 | shr ecx, 3 |
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254 | cmp eax, edx |
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255 | jne @F |
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1333 | diamond | 256 | btr [mst.smallmap], ecx |
276 | serge | 257 | @@: |
258 | mov [eax+12], edx ;F->bk = B; |
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259 | mov [edx+8], eax ;B->fd = F |
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260 | jmp .next |
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261 | .unlink_large: |
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262 | mov edx, edi |
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263 | call unlink_large_chunk |
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264 | .next: |
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265 | |||
266 | ; if(next->head & PINUSE_BIT) |
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267 | |||
268 | mov eax, [ebx+4] |
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269 | test al, 1 |
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270 | jz .fail2 |
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271 | |||
272 | ; if (! (next->head & CINUSE_BIT)) |
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273 | |||
274 | test al, 2 |
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275 | jnz .fix_next |
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276 | |||
277 | ; if (next == ms.top) |
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278 | |||
279 | cmp ebx, [mst.top] |
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280 | jne @F |
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281 | |||
282 | ; tsize = ms.topsize += psize; |
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283 | |||
284 | mov eax, [mst.topsize] |
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285 | add eax, esi |
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286 | mov [mst.topsize], eax |
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287 | |||
288 | ; ms.top = p; |
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289 | ; p->head = tsize | PINUSE_BIT; |
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290 | |||
291 | or eax, 1 |
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292 | mov [mst.top], edi |
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293 | mov [edi+4], eax |
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294 | .fail2: |
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2130 | serge | 295 | mov esi, eax |
296 | mov ecx, mst.mutex |
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297 | call mutex_unlock |
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298 | mov eax, esi |
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276 | serge | 299 | pop esi |
300 | .fail: |
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301 | pop edi |
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2259 | Serge | 302 | .exit: |
276 | serge | 303 | ret |
2259 | Serge | 304 | |
276 | serge | 305 | @@: |
306 | |||
307 | ; nsize = next->head & ~INUSE_BITS; |
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308 | |||
309 | and eax, -4 |
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310 | add esi, eax ;psize += nsize; |
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311 | |||
312 | ; if (nsize < 256) |
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313 | |||
314 | cmp eax, 256 |
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315 | jae .unl_large |
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316 | |||
317 | mov edx, [ebx+8] ;F = next->fd |
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318 | mov ebx, [ebx+12] ;B = next->bk |
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319 | |||
320 | ; if (F == B) |
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321 | |||
322 | cmp edx, ebx |
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323 | jne @F |
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324 | mov ecx, eax |
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325 | shr ecx, 3 |
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326 | btr [mst.smallmap], ecx |
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327 | @@: |
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328 | mov [edx+12], ebx ;F->bk = B |
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329 | |||
330 | ; p->head = psize|PINUSE_BIT; |
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331 | |||
332 | mov ecx, esi |
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333 | mov [ebx+8], edx |
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334 | or ecx, 1 |
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335 | mov [edi+4], ecx |
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336 | |||
337 | ; (p+psize)->prev_foot = psize; |
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338 | |||
339 | mov [esi+edi], esi |
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340 | |||
341 | ; insert_chunk(p,psize); |
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342 | |||
343 | mov eax, esi |
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344 | pop esi |
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345 | mov ecx, edi |
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346 | pop edi |
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347 | jmp insert_chunk |
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348 | .unl_large: |
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349 | |||
350 | ; unlink_large_chunk((tchunkptr)next); |
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351 | |||
352 | mov edx, ebx |
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353 | call unlink_large_chunk |
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354 | ; p->head = psize|PINUSE_BIT; |
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355 | |||
356 | mov ecx, esi |
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357 | or ecx, 1 |
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358 | mov [edi+4], ecx |
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359 | |||
360 | ; (p+psize)->prev_foot = psize; |
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361 | |||
362 | mov [esi+edi], esi |
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363 | |||
364 | ; insert_chunk(p,psize); |
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365 | |||
366 | mov eax, esi |
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367 | pop esi |
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368 | mov ecx, edi |
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369 | pop edi |
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370 | jmp insert_chunk |
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371 | .fix_next: |
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372 | |||
373 | ; (p+psize)->prev_foot = psize; |
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374 | ; next->head &= ~PINUSE_BIT; |
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375 | ; p->head = psize|PINUSE_BIT; |
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376 | |||
377 | and eax, -2 |
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378 | mov edx, esi |
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379 | mov [ebx+4], eax |
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380 | or edx, 1 |
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381 | mov [edi+4], edx |
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382 | |||
383 | ; (p+psize)->prev_foot = psize; |
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384 | |||
385 | mov [esi+edi], esi |
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386 | ; insert_chunk(p,psize); |
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387 | |||
388 | mov eax, esi |
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389 | pop esi |
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390 | mov ecx, edi |
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391 | pop edi |
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392 | jmp insert_chunk |
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393 | |||
394 | ; param |
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395 | ; ecx = chunk |
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396 | ; eax = size |
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397 | |||
398 | insert_chunk: |
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399 | |||
400 | cmp eax, 256 |
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401 | push esi |
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402 | mov esi, ecx |
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403 | jae .large |
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404 | |||
405 | ; I = S>>3; |
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406 | ; ms.smallmap |= 1<< I; |
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407 | |||
408 | shr eax, 3 |
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409 | bts [mst.smallmap], eax |
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410 | |||
411 | ; B = &ms.smallbins[I]; |
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412 | |||
413 | shl eax, 4 |
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414 | add eax, mst.smallbins |
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415 | mov edx, [eax+8] ;F = B->fd |
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416 | mov [eax+8], esi ;B->fd = P |
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417 | mov [edx+12], esi ;F->bk = P |
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418 | mov [esi+8], edx ;P->fd = F |
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419 | mov [esi+12], eax ;P->bk = B |
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420 | pop esi |
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2130 | serge | 421 | mov ecx, mst.mutex |
422 | call mutex_unlock |
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276 | serge | 423 | ret |
424 | .large: |
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425 | mov ebx, eax |
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426 | call insert_large_chunk |
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427 | pop esi |
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2130 | serge | 428 | mov ecx, mst.mutex |
429 | call mutex_unlock |
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276 | serge | 430 | ret |
431 | |||
432 | |||
433 | ; param |
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434 | ; esi= chunk |
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435 | ; ebx= size |
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436 | |||
437 | insert_large_chunk: |
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438 | |||
439 | ; I = compute_tree_index(S); |
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440 | |||
441 | mov edx, ebx |
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442 | shr edx, 8 |
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443 | bsr eax, edx |
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444 | lea ecx, [eax+7] |
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445 | mov edx, ebx |
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446 | shr edx, cl |
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447 | and edx, 1 |
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448 | lea ecx, [edx+eax*2] |
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449 | |||
450 | ; X->index = I; |
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451 | mov dword [esi+28], ecx |
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452 | |||
453 | ; X->child[0] = X->child[1] = 0; |
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454 | and dword [esi+20], 0 |
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455 | and dword [esi+16], 0 |
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456 | |||
457 | ; H = &ms.treebins[I]; |
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458 | |||
459 | mov eax, ecx |
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460 | lea edx, [mst.treebins+eax*4] |
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461 | |||
462 | ; if (!(ms.treemap & 1< |
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463 | bt [mst.treemap], ecx |
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464 | jc .tree |
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465 | |||
466 | ; ms.treemap |= 1< |
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467 | bts [mst.treemap], ecx |
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468 | ; *H = X; |
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469 | mov dword [edx], esi |
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470 | jmp .done |
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471 | .tree: |
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472 | |||
473 | ; T = *H; |
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474 | mov edx, [edx] |
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475 | |||
476 | ; K = S << leftshift_for_tree_index(I); |
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477 | mov eax, ecx |
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478 | shr eax, 1 |
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479 | sub ecx, 31 |
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480 | mov edi, 37 |
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481 | sub edi, eax |
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482 | neg ecx |
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483 | sbb ecx, ecx |
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484 | and ecx, edi |
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485 | mov eax, ebx |
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486 | shl eax, cl ;eax= K |
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487 | |||
488 | jmp .loop |
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489 | .not_eq_size: |
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490 | |||
491 | ; C = &(T->child[(K >> 31) & 1]); |
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492 | mov ecx, eax |
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493 | shr ecx, 31 |
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494 | lea ecx, [edx+ecx*4+16] |
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495 | |||
496 | ; K <<= 1; |
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497 | ; if (*C != 0) |
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498 | mov edi, [ecx] |
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499 | add eax, eax |
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500 | test edi, edi |
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501 | jz .insert_child |
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502 | |||
503 | ; T = *C; |
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504 | mov edx, edi |
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505 | .loop: |
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506 | |||
507 | ; for (;;) |
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508 | ; if ((T->head & ~INUSE_BITS) != S) |
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509 | |||
510 | mov ecx, [edx+4] |
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511 | and ecx, not 3 |
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512 | cmp ecx, ebx |
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513 | jne .not_eq_size |
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514 | |||
515 | ; F = T->fd; |
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516 | mov eax, [edx+8] |
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517 | |||
518 | ; T->fd = F->bk = X; |
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519 | mov [eax+12], esi |
||
520 | mov [edx+8], esi |
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521 | |||
522 | ; X->fd = F; |
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523 | ; X->bk = T; |
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524 | ; X->parent = 0; |
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525 | |||
526 | and dword [esi+24], 0 |
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527 | mov [esi+8], eax |
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528 | mov [esi+12], edx |
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529 | ret |
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530 | .insert_child: |
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531 | |||
532 | ; *C = X; |
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533 | mov [ecx], esi |
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534 | .done: |
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535 | |||
536 | ; X->parent = T; |
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537 | mov [esi+24], edx |
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538 | |||
539 | ; X->fd = X->bk = X; |
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540 | mov [esi+12], esi |
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541 | mov [esi+8], esi |
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542 | ret |
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543 | |||
544 | |||
545 | ; param |
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546 | ; edx= chunk |
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547 | |||
548 | unlink_large_chunk: |
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549 | |||
550 | mov eax, [edx+12] |
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551 | cmp eax, edx |
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552 | push edi |
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553 | mov edi, [edx+24] |
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554 | je @F |
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555 | |||
556 | mov ecx, [edx+8] ;F = X->fd |
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557 | mov [ecx+12], eax ;F->bk = R; |
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558 | mov [eax+8], ecx ;R->fd = F |
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559 | jmp .parent |
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560 | @@: |
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561 | mov eax, [edx+20] |
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562 | test eax, eax |
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563 | push esi |
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564 | lea esi, [edx+20] |
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565 | jne .loop |
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566 | |||
567 | mov eax, [edx+16] |
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568 | test eax, eax |
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569 | lea esi, [edx+16] |
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570 | je .l2 |
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571 | .loop: |
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572 | cmp dword [eax+20], 0 |
||
573 | lea ecx, [eax+20] |
||
574 | jne @F |
||
575 | |||
576 | cmp dword [eax+16], 0 |
||
577 | lea ecx, [eax+16] |
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578 | je .l1 |
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579 | @@: |
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580 | mov eax, [ecx] |
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581 | mov esi, ecx |
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582 | jmp .loop |
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583 | .l1: |
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584 | mov dword [esi], 0 |
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585 | .l2: |
||
586 | pop esi |
||
587 | .parent: |
||
588 | test edi, edi |
||
589 | je .done |
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590 | |||
591 | mov ecx, [edx+28] |
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592 | cmp edx, [mst.treebins+ecx*4] |
||
593 | lea ecx, [mst.treebins+ecx*4] |
||
594 | jne .l3 |
||
595 | |||
596 | test eax, eax |
||
597 | mov [ecx], eax |
||
598 | jne .l5 |
||
599 | |||
600 | mov ecx, [edx+28] |
||
601 | btr [mst.treemap], ecx |
||
602 | pop edi |
||
603 | ret |
||
2259 | Serge | 604 | |
276 | serge | 605 | .l3: |
606 | cmp [edi+16], edx |
||
607 | jne @F |
||
608 | |||
609 | mov [edi+16], eax |
||
610 | jmp .l4 |
||
2259 | Serge | 611 | |
276 | serge | 612 | @@: |
613 | mov [edi+20], eax |
||
2259 | Serge | 614 | |
276 | serge | 615 | .l4: |
616 | test eax, eax |
||
617 | je .done |
||
2259 | Serge | 618 | |
276 | serge | 619 | .l5: |
620 | mov [eax+24], edi |
||
621 | mov ecx, [edx+16] |
||
622 | test ecx, ecx |
||
623 | je .l6 |
||
624 | |||
625 | mov [eax+16], ecx |
||
626 | mov [ecx+24], eax |
||
2259 | Serge | 627 | |
276 | serge | 628 | .l6: |
629 | mov edx, [edx+20] |
||
630 | test edx, edx |
||
631 | je .done |
||
632 | |||
633 | mov [eax+20], edx |
||
634 | mov [edx+24], eax |
||
2259 | Serge | 635 | |
276 | serge | 636 | .done: |
637 | pop edi |
||
638 | ret |
||
639 | |||
640 | ; param |
||
641 | ; esi= nb |
||
642 | |||
643 | malloc_small: |
||
644 | push ebp |
||
645 | mov ebp, esi |
||
646 | |||
647 | push edi |
||
648 | |||
649 | bsf eax,[mst.treemap] |
||
650 | mov ecx, [mst.treebins+eax*4] |
||
651 | |||
652 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
653 | |||
654 | mov edi, [ecx+4] |
||
655 | and edi, -4 |
||
656 | sub edi, esi |
||
2259 | Serge | 657 | |
276 | serge | 658 | .loop: |
659 | mov ebx, ecx |
||
2259 | Serge | 660 | |
276 | serge | 661 | .loop_1: |
662 | |||
663 | ; while ((t = leftmost_child(t)) != 0) |
||
664 | |||
665 | mov eax, [ecx+16] |
||
666 | test eax, eax |
||
667 | jz @F |
||
668 | mov ecx, eax |
||
669 | jmp .l1 |
||
2259 | Serge | 670 | |
276 | serge | 671 | @@: |
672 | mov ecx, [ecx+20] |
||
2259 | Serge | 673 | |
276 | serge | 674 | .l1: |
675 | test ecx, ecx |
||
676 | jz .unlink |
||
677 | |||
678 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
679 | |||
680 | mov eax, [ecx+4] |
||
681 | and eax, -4 |
||
682 | sub eax, ebp |
||
683 | |||
684 | ; if (trem < rsize) |
||
685 | |||
686 | cmp eax, edi |
||
687 | jae .loop_1 |
||
688 | |||
689 | ; rsize = trem; |
||
690 | |||
691 | mov edi, eax |
||
692 | jmp .loop |
||
693 | .unlink: |
||
694 | |||
695 | |||
696 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
697 | ; unlink_large_chunk(v); |
||
698 | |||
699 | mov edx, ebx |
||
700 | lea esi, [ebx+ebp] |
||
701 | call unlink_large_chunk |
||
702 | |||
703 | ; if (rsize < 16) |
||
704 | |||
705 | cmp edi, 16 |
||
706 | jae .split |
||
707 | |||
708 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
709 | |||
710 | lea ecx, [edi+ebp] |
||
711 | |||
712 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
713 | |||
714 | add edi, ebx |
||
715 | lea eax, [edi+ebp+4] |
||
716 | pop edi |
||
717 | or ecx, 3 |
||
718 | mov [ebx+4], ecx |
||
719 | or dword [eax], 1 |
||
720 | pop ebp |
||
721 | |||
722 | lea eax, [ebx+8] |
||
723 | ret |
||
1211 | Lrz | 724 | |
276 | serge | 725 | .split: |
726 | |||
727 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
728 | ; r->head = rsize|PINUSE_BIT; |
||
729 | ; (r+rsize)->prev_foot = rsize; |
||
730 | |||
731 | or ebp, 3 |
||
732 | mov edx, edi |
||
733 | or edx, 1 |
||
734 | |||
735 | cmp edi, 256 |
||
736 | mov [ebx+4], ebp |
||
737 | mov [esi+4], edx |
||
738 | mov [esi+edi], edi |
||
739 | jae .large |
||
740 | |||
741 | shr edi, 3 |
||
742 | bts [mst.smallmap], edi |
||
743 | |||
744 | mov eax, edi |
||
745 | shl eax, 4 |
||
746 | add eax, mst.smallbins |
||
747 | |||
748 | mov edx, [eax+8] |
||
749 | mov [eax+8], esi |
||
750 | mov [edx+12], esi |
||
751 | pop edi |
||
752 | mov [esi+12], eax |
||
753 | mov [esi+8], edx |
||
754 | pop ebp |
||
755 | lea eax, [ebx+8] |
||
756 | ret |
||
1211 | Lrz | 757 | |
276 | serge | 758 | .large: |
759 | lea eax, [ebx+8] |
||
760 | push eax |
||
761 | mov ebx, edi |
||
762 | call insert_large_chunk |
||
763 | pop eax |
||
764 | pop edi |
||
765 | pop ebp |
||
766 | ret |
||
767 | |||
768 | |||
769 | ; param |
||
770 | ; esi= nb |
||
771 | |||
772 | malloc_large: |
||
773 | .idx equ esp+4 |
||
774 | .rst equ esp |
||
775 | |||
776 | push ebp |
||
1333 | diamond | 777 | push esi |
276 | serge | 778 | push edi |
779 | sub esp, 8 |
||
780 | ; v = 0; |
||
781 | ; rsize = -nb; |
||
782 | |||
783 | mov edi, esi |
||
784 | mov ebx, esi |
||
785 | xor ebp, ebp |
||
786 | neg edi |
||
787 | |||
788 | ; idx = compute_tree_index(nb); |
||
789 | |||
790 | mov edx, esi |
||
791 | shr edx, 8 |
||
792 | bsr eax, edx |
||
793 | lea ecx, [eax+7] |
||
794 | shr esi, cl |
||
795 | and esi, 1 |
||
796 | lea ecx, [esi+eax*2] |
||
797 | mov [.idx], ecx |
||
798 | |||
799 | ; if ((t = ms.treebins[idx]) != 0) |
||
800 | |||
801 | mov eax, [mst.treebins+ecx*4] |
||
802 | test eax, eax |
||
803 | jz .l3 |
||
804 | |||
805 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
806 | |||
807 | cmp ecx, 31 |
||
808 | jne @F |
||
809 | xor ecx, ecx |
||
810 | jmp .l1 |
||
1211 | Lrz | 811 | |
276 | serge | 812 | @@: |
813 | mov edx, ecx |
||
814 | shr edx, 1 |
||
815 | mov ecx, 37 |
||
816 | sub ecx, edx |
||
1211 | Lrz | 817 | |
276 | serge | 818 | .l1: |
819 | mov edx, ebx |
||
820 | shl edx, cl |
||
821 | |||
822 | ; rst = 0; |
||
823 | mov [.rst], ebp |
||
1211 | Lrz | 824 | |
276 | serge | 825 | .loop: |
826 | |||
827 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
828 | |||
829 | mov ecx, [eax+4] |
||
830 | and ecx, -4 |
||
831 | sub ecx, ebx |
||
832 | |||
833 | ; if (trem < rsize) |
||
834 | |||
835 | cmp ecx, edi |
||
836 | jae @F |
||
837 | ; v = t; |
||
838 | ; if ((rsize = trem) == 0) |
||
839 | |||
840 | test ecx, ecx |
||
841 | mov ebp, eax |
||
842 | mov edi, ecx |
||
843 | je .l2 |
||
1211 | Lrz | 844 | |
276 | serge | 845 | @@: |
846 | |||
847 | ; rt = t->child[1]; |
||
848 | |||
849 | mov ecx, [eax+20] |
||
850 | |||
851 | ; t = t->child[(sizebits >> 31) & 1]; |
||
852 | |||
853 | mov esi, edx |
||
854 | shr esi, 31 |
||
855 | |||
856 | ; if (rt != 0 && rt != t) |
||
857 | |||
858 | test ecx, ecx |
||
859 | mov eax, [eax+esi*4+16] |
||
860 | jz @F |
||
861 | cmp ecx, eax |
||
862 | jz @F |
||
863 | |||
864 | ; rst = rt; |
||
865 | mov [.rst], ecx |
||
1211 | Lrz | 866 | |
276 | serge | 867 | @@: |
868 | ; if (t == 0) |
||
869 | |||
870 | test eax, eax |
||
871 | jz @F |
||
872 | |||
873 | ; sizebits <<= 1; |
||
874 | |||
875 | add edx, edx |
||
876 | jmp .loop |
||
1211 | Lrz | 877 | |
276 | serge | 878 | @@: |
879 | ; t = rst; |
||
880 | mov eax, [.rst] |
||
1211 | Lrz | 881 | |
276 | serge | 882 | .l2: |
883 | ; if (t == 0 && v == 0) |
||
884 | |||
885 | test eax, eax |
||
886 | jne .l4 |
||
887 | test ebp, ebp |
||
888 | jne .l7 |
||
889 | mov ecx, [.idx] |
||
1211 | Lrz | 890 | |
276 | serge | 891 | .l3: |
892 | |||
893 | ; leftbits = (-1< |
||
894 | ; if (leftbits != 0) |
||
895 | |||
896 | or edx, -1 |
||
897 | shl edx, cl |
||
898 | and edx, [mst.treemap] |
||
899 | jz @F |
||
900 | |||
901 | bsf eax, edx |
||
902 | ; t = ms.treebins[i]; |
||
903 | mov eax, [mst.treebins+eax*4] |
||
1211 | Lrz | 904 | |
276 | serge | 905 | @@: |
906 | |||
907 | ; while (t != 0) |
||
908 | test eax, eax |
||
909 | jz .l5 |
||
1211 | Lrz | 910 | |
276 | serge | 911 | .l4: |
912 | |||
913 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
914 | |||
915 | mov ecx, [eax+4] |
||
916 | and ecx, -4 |
||
917 | sub ecx, ebx |
||
918 | |||
919 | ; if (trem < rsize) |
||
920 | |||
921 | cmp ecx, edi |
||
922 | jae @F |
||
923 | ; rsize = trem; |
||
924 | |||
925 | mov edi, ecx |
||
926 | ; v = t; |
||
927 | mov ebp, eax |
||
1211 | Lrz | 928 | |
276 | serge | 929 | @@: |
930 | |||
931 | ; t = leftmost_child(t); |
||
932 | |||
933 | mov ecx, [eax+16] |
||
934 | test ecx, ecx |
||
935 | je @F |
||
936 | mov eax, ecx |
||
937 | jmp .l6 |
||
1211 | Lrz | 938 | |
276 | serge | 939 | @@: |
940 | mov eax, [eax+20] |
||
1211 | Lrz | 941 | |
276 | serge | 942 | .l6: |
943 | |||
944 | ; while (t != 0) |
||
945 | |||
946 | test eax, eax |
||
947 | jne .l4 |
||
1211 | Lrz | 948 | |
276 | serge | 949 | .l5: |
950 | |||
951 | ; if (v != 0) |
||
952 | |||
953 | test ebp, ebp |
||
954 | jz .done |
||
1211 | Lrz | 955 | |
276 | serge | 956 | .l7: |
957 | |||
958 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
959 | ; unlink_large_chunk(v); |
||
960 | |||
961 | mov edx, ebp |
||
962 | lea esi, [ebx+ebp] |
||
963 | call unlink_large_chunk |
||
964 | |||
326 | serge | 965 | ; if (rsize < 16) |
276 | serge | 966 | |
326 | serge | 967 | cmp edi, 16 |
276 | serge | 968 | jae .large |
969 | |||
970 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
971 | |||
972 | lea ecx, [edi+ebx] |
||
973 | |||
974 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
975 | |||
976 | add edi, ebp |
||
977 | lea eax, [edi+ebx+4] |
||
978 | or ecx, 3 |
||
979 | mov [ebp+4], ecx |
||
980 | or dword [eax], 1 |
||
981 | lea eax, [ebp+8] |
||
982 | add esp, 8 |
||
983 | pop edi |
||
1333 | diamond | 984 | pop esi |
276 | serge | 985 | pop ebp |
986 | ret |
||
1211 | Lrz | 987 | |
276 | serge | 988 | .large: |
989 | |||
990 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
991 | ; r->head = rsize|PINUSE_BIT; |
||
992 | |||
993 | mov edx, edi |
||
994 | or ebx, 3 |
||
995 | mov [ebp+4], ebx |
||
996 | or edx, 1 |
||
997 | mov [esi+4], edx |
||
998 | |||
999 | ; (r+rsize)->prev_foot = rsize; |
||
1000 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
1001 | |||
1002 | mov [esi+edi], edi |
||
326 | serge | 1003 | mov eax, edi |
1004 | mov ecx, esi |
||
1005 | call insert_chunk |
||
276 | serge | 1006 | |
1007 | lea eax, [ebp+8] |
||
1008 | add esp, 8 |
||
1009 | pop edi |
||
1333 | diamond | 1010 | pop esi |
276 | serge | 1011 | pop ebp |
1012 | ret |
||
1211 | Lrz | 1013 | |
276 | serge | 1014 | .done: |
1015 | add esp, 8 |
||
1016 | pop edi |
||
1333 | diamond | 1017 | pop esi |
276 | serge | 1018 | pop ebp |
1019 | xor eax, eax |
||
1020 | ret |
||
1021 | |||
1022 | init_malloc: |
||
1023 | |||
753 | serge | 1024 | stdcall kernel_alloc, 0x40000 |
276 | serge | 1025 | |
1026 | mov [mst.top], eax |
||
1027 | mov [mst.topsize], 128*1024 |
||
1028 | mov dword [eax+4], (128*1024) or 1 |
||
1029 | mov eax, mst.smallbins |
||
1211 | Lrz | 1030 | |
276 | serge | 1031 | @@: |
1032 | mov [eax+8], eax |
||
1033 | mov [eax+12], eax |
||
1034 | add eax, 16 |
||
1035 | cmp eax, mst.smallbins+512 |
||
465 | serge | 1036 | jb @B |
276 | serge | 1037 | |
2130 | serge | 1038 | mov ecx, mst.mutex |
1039 | call mutex_init |
||
1040 | |||
276 | serge | 1041 | ret>> |
1042 |