1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2011 Marc Alexander Lehmann <schmorp@schmorp.de> |
3 | * |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
5 | * tion, are permitted provided that the following conditions are met: |
5 | * tion, are permitted provided that the following conditions are met: |
6 | * |
6 | * |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
8 | * this list of conditions and the following disclaimer. |
8 | * this list of conditions and the following disclaimer. |
9 | * |
9 | * |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
17 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
39 | */ |
39 | */ |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
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43 | #include <stddef.h> |
43 | #include <string.h> |
44 | #include <string.h> |
44 | |
45 | |
45 | /*****************************************************************************/ |
46 | /*****************************************************************************/ |
46 | /* ucontext/setjmp/asm backends */ |
47 | /* ucontext/setjmp/asm backends */ |
47 | /*****************************************************************************/ |
48 | /*****************************************************************************/ |
… | |
… | |
86 | volatile coro_func func = coro_init_func; |
87 | volatile coro_func func = coro_init_func; |
87 | volatile void *arg = coro_init_arg; |
88 | volatile void *arg = coro_init_arg; |
88 | |
89 | |
89 | coro_transfer (new_coro, create_coro); |
90 | coro_transfer (new_coro, create_coro); |
90 | |
91 | |
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92 | #if __GCC_HAVE_DWARF2_CFI_ASM && __amd64 |
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93 | asm (".cfi_undefined rip"); |
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94 | #endif |
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95 | |
91 | func ((void *)arg); |
96 | func ((void *)arg); |
92 | |
97 | |
93 | /* the new coro returned. bad. just abort() for now */ |
98 | /* the new coro returned. bad. just abort() for now */ |
94 | abort (); |
99 | abort (); |
95 | } |
100 | } |
… | |
… | |
100 | |
105 | |
101 | /* trampoline signal handler */ |
106 | /* trampoline signal handler */ |
102 | static void |
107 | static void |
103 | trampoline (int sig) |
108 | trampoline (int sig) |
104 | { |
109 | { |
105 | if ( |
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106 | #if _XOPEN_UNIX > 0 |
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107 | _setjmp (new_coro->env) |
110 | if (coro_setjmp (new_coro->env)) |
108 | #else |
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109 | sigsetjmp (new_coro->env, 0) |
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110 | #endif |
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111 | ) { |
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112 | coro_init (); /* start it */ |
111 | coro_init (); /* start it */ |
113 | } |
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114 | else |
112 | else |
115 | trampoline_done = 1; |
113 | trampoline_done = 1; |
116 | } |
114 | } |
117 | |
115 | |
118 | # endif |
116 | # endif |
119 | |
117 | |
120 | # if CORO_ASM |
118 | # if CORO_ASM |
121 | |
119 | |
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120 | #if _WIN32 || __CYGWIN__ |
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121 | #define CORO_WIN_TIB 1 |
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122 | #endif |
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123 | |
122 | asm ( |
124 | asm ( |
123 | ".text\n" |
125 | "\t.text\n" |
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126 | #if _WIN32 || __CYGWIN__ |
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127 | "\t.globl _coro_transfer\n" |
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128 | "_coro_transfer:\n" |
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129 | #else |
124 | ".globl coro_transfer\n" |
130 | "\t.globl coro_transfer\n" |
125 | ".type coro_transfer, @function\n" |
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126 | "coro_transfer:\n" |
131 | "coro_transfer:\n" |
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132 | #endif |
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133 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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134 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
127 | #if __amd64 |
135 | #if __amd64 |
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136 | |
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137 | #if _WIN32 || __CYGWIN__ |
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138 | #define NUM_SAVED 29 |
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139 | "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */ |
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140 | "\tmovaps %xmm6, (%rsp)\n" |
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141 | "\tmovaps %xmm7, 16(%rsp)\n" |
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142 | "\tmovaps %xmm8, 32(%rsp)\n" |
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143 | "\tmovaps %xmm9, 48(%rsp)\n" |
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144 | "\tmovaps %xmm10, 64(%rsp)\n" |
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145 | "\tmovaps %xmm11, 80(%rsp)\n" |
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146 | "\tmovaps %xmm12, 96(%rsp)\n" |
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147 | "\tmovaps %xmm13, 112(%rsp)\n" |
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148 | "\tmovaps %xmm14, 128(%rsp)\n" |
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149 | "\tmovaps %xmm15, 144(%rsp)\n" |
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150 | "\tpushq %rsi\n" |
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151 | "\tpushq %rdi\n" |
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152 | "\tpushq %rbp\n" |
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153 | "\tpushq %rbx\n" |
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154 | "\tpushq %r12\n" |
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155 | "\tpushq %r13\n" |
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156 | "\tpushq %r14\n" |
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157 | "\tpushq %r15\n" |
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158 | #if CORO_WIN_TIB |
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159 | "\tpushq %fs:0x0\n" |
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160 | "\tpushq %fs:0x8\n" |
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161 | "\tpushq %fs:0xc\n" |
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162 | #endif |
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163 | "\tmovq %rsp, (%rcx)\n" |
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164 | "\tmovq (%rdx), %rsp\n" |
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165 | #if CORO_WIN_TIB |
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166 | "\tpopq %fs:0xc\n" |
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167 | "\tpopq %fs:0x8\n" |
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168 | "\tpopq %fs:0x0\n" |
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169 | #endif |
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170 | "\tpopq %r15\n" |
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171 | "\tpopq %r14\n" |
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172 | "\tpopq %r13\n" |
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173 | "\tpopq %r12\n" |
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174 | "\tpopq %rbx\n" |
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175 | "\tpopq %rbp\n" |
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176 | "\tpopq %rdi\n" |
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177 | "\tpopq %rsi\n" |
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178 | "\tmovaps (%rsp), %xmm6\n" |
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179 | "\tmovaps 16(%rsp), %xmm7\n" |
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180 | "\tmovaps 32(%rsp), %xmm8\n" |
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181 | "\tmovaps 48(%rsp), %xmm9\n" |
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182 | "\tmovaps 64(%rsp), %xmm10\n" |
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183 | "\tmovaps 80(%rsp), %xmm11\n" |
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184 | "\tmovaps 96(%rsp), %xmm12\n" |
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185 | "\tmovaps 112(%rsp), %xmm13\n" |
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186 | "\tmovaps 128(%rsp), %xmm14\n" |
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187 | "\tmovaps 144(%rsp), %xmm15\n" |
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188 | "\taddq $168, %rsp\n" |
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189 | #else |
128 | #define NUM_SAVED 6 |
190 | #define NUM_SAVED 6 |
129 | "\tpush %rbp\n" |
191 | "\tpushq %rbp\n" |
130 | "\tpush %rbx\n" |
192 | "\tpushq %rbx\n" |
131 | "\tpush %r12\n" |
193 | "\tpushq %r12\n" |
132 | "\tpush %r13\n" |
194 | "\tpushq %r13\n" |
133 | "\tpush %r14\n" |
195 | "\tpushq %r14\n" |
134 | "\tpush %r15\n" |
196 | "\tpushq %r15\n" |
135 | "\tmov %rsp, (%rdi)\n" |
197 | "\tmovq %rsp, (%rdi)\n" |
136 | "\tmov (%rsi), %rsp\n" |
198 | "\tmovq (%rsi), %rsp\n" |
137 | "\tpop %r15\n" |
199 | "\tpopq %r15\n" |
138 | "\tpop %r14\n" |
200 | "\tpopq %r14\n" |
139 | "\tpop %r13\n" |
201 | "\tpopq %r13\n" |
140 | "\tpop %r12\n" |
202 | "\tpopq %r12\n" |
141 | "\tpop %rbx\n" |
203 | "\tpopq %rbx\n" |
142 | "\tpop %rbp\n" |
204 | "\tpopq %rbp\n" |
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205 | #endif |
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206 | "\tpopq %rcx\n" |
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207 | "\tjmpq *%rcx\n" |
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208 | |
143 | #elif __i386 |
209 | #elif __i386 |
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210 | |
144 | #define NUM_SAVED 4 |
211 | #define NUM_SAVED 4 |
145 | "\tpush %ebp\n" |
212 | "\tpushl %ebp\n" |
146 | "\tpush %ebx\n" |
213 | "\tpushl %ebx\n" |
147 | "\tpush %esi\n" |
214 | "\tpushl %esi\n" |
148 | "\tpush %edi\n" |
215 | "\tpushl %edi\n" |
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216 | #if CORO_WIN_TIB |
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217 | #undef NUM_SAVED |
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218 | #define NUM_SAVED 7 |
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219 | "\tpushl %fs:0\n" |
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220 | "\tpushl %fs:4\n" |
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221 | "\tpushl %fs:8\n" |
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222 | #endif |
149 | "\tmov %esp, (%eax)\n" |
223 | "\tmovl %esp, (%eax)\n" |
150 | "\tmov (%edx), %esp\n" |
224 | "\tmovl (%edx), %esp\n" |
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225 | #if CORO_WIN_TIB |
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226 | "\tpopl %fs:8\n" |
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227 | "\tpopl %fs:4\n" |
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228 | "\tpopl %fs:0\n" |
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229 | #endif |
151 | "\tpop %edi\n" |
230 | "\tpopl %edi\n" |
152 | "\tpop %esi\n" |
231 | "\tpopl %esi\n" |
153 | "\tpop %ebx\n" |
232 | "\tpopl %ebx\n" |
154 | "\tpop %ebp\n" |
233 | "\tpopl %ebp\n" |
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234 | "\tpopl %ecx\n" |
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235 | "\tjmpl *%ecx\n" |
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236 | |
155 | #else |
237 | #else |
156 | #error unsupported architecture |
238 | #error unsupported architecture |
157 | #endif |
239 | #endif |
158 | "\tret\n" |
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159 | ); |
240 | ); |
160 | |
241 | |
161 | # endif |
242 | # endif |
162 | |
243 | |
163 | void |
244 | void |
164 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
245 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
165 | { |
246 | { |
166 | coro_context nctx; |
247 | coro_context nctx; |
167 | # if CORO_SJLJ |
248 | # if CORO_SJLJ |
168 | stack_t ostk, nstk; |
249 | stack_t ostk, nstk; |
169 | struct sigaction osa, nsa; |
250 | struct sigaction osa, nsa; |
… | |
… | |
195 | perror ("sigaction"); |
276 | perror ("sigaction"); |
196 | abort (); |
277 | abort (); |
197 | } |
278 | } |
198 | |
279 | |
199 | /* set the new stack */ |
280 | /* set the new stack */ |
200 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
281 | nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */ |
201 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
282 | nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize); |
202 | nstk.ss_flags = 0; |
283 | nstk.ss_flags = 0; |
203 | |
284 | |
204 | if (sigaltstack (&nstk, &ostk) < 0) |
285 | if (sigaltstack (&nstk, &ostk) < 0) |
205 | { |
286 | { |
206 | perror ("sigaltstack"); |
287 | perror ("sigaltstack"); |
… | |
… | |
229 | sigaction (SIGUSR2, &osa, 0); |
310 | sigaction (SIGUSR2, &osa, 0); |
230 | sigprocmask (SIG_SETMASK, &osig, 0); |
311 | sigprocmask (SIG_SETMASK, &osig, 0); |
231 | |
312 | |
232 | # elif CORO_LOSER |
313 | # elif CORO_LOSER |
233 | |
314 | |
234 | setjmp (ctx->env); |
315 | coro_setjmp (ctx->env); |
235 | #if __CYGWIN__ |
316 | #if __CYGWIN__ && __i386 |
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317 | ctx->env[8] = (long) coro_init; |
236 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
318 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
237 | ctx->env[8] = (long)coro_init; |
319 | #elif __CYGWIN__ && __x86_64 |
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320 | ctx->env[7] = (long) coro_init; |
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321 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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322 | #elif defined __MINGW32__ |
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323 | ctx->env[5] = (long) coro_init; |
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324 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
238 | #elif defined(_M_IX86) |
325 | #elif defined _M_IX86 |
239 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
326 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
240 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
327 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
241 | #elif defined(_M_AMD64) |
328 | #elif defined _M_AMD64 |
242 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
329 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
243 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
330 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
244 | #elif defined(_M_IA64) |
331 | #elif defined _M_IA64 |
245 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
332 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
246 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
333 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
247 | #else |
334 | #else |
248 | #error "microsoft libc or architecture not supported" |
335 | #error "microsoft libc or architecture not supported" |
249 | #endif |
336 | #endif |
250 | |
337 | |
251 | # elif CORO_LINUX |
338 | # elif CORO_LINUX |
252 | |
339 | |
253 | _setjmp (ctx->env); |
340 | coro_setjmp (ctx->env); |
254 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
341 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
255 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
342 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
256 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
343 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
257 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
344 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
258 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
345 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
259 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
346 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
260 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
347 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
261 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
348 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
262 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
349 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
263 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
350 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
264 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
351 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
265 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
352 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
266 | #else |
353 | #else |
267 | #error "linux libc or architecture not supported" |
354 | #error "linux libc or architecture not supported" |
268 | #endif |
355 | #endif |
269 | |
356 | |
270 | # elif CORO_IRIX |
357 | # elif CORO_IRIX |
271 | |
358 | |
272 | sigsetjmp (ctx->env, 0); |
359 | coro_setjmp (ctx->env, 0); |
273 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
360 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
274 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
361 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
275 | |
362 | |
276 | # elif CORO_ASM |
363 | # elif CORO_ASM |
277 | |
364 | |
278 | ctx->sp = (void **)(ssize + (char *)sptr); |
365 | ctx->sp = (void **)(ssize + (char *)sptr); |
279 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
366 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
280 | *--ctx->sp = (void *)coro_init; |
367 | *--ctx->sp = (void *)coro_init; |
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368 | |
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369 | #if CORO_WIN_TIB |
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370 | *--ctx->sp = 0; /* ExceptionList */ |
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371 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
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372 | *--ctx->sp = sptr; /* StackLimit */ |
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373 | #endif |
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374 | |
281 | ctx->sp -= NUM_SAVED; |
375 | ctx->sp -= NUM_SAVED; |
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376 | memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED); |
282 | |
377 | |
283 | # elif CORO_UCONTEXT |
378 | # elif CORO_UCONTEXT |
284 | |
379 | |
285 | getcontext (&(ctx->uc)); |
380 | getcontext (&(ctx->uc)); |
286 | |
381 | |
… | |
… | |
341 | void |
436 | void |
342 | coro_transfer (coro_context *prev, coro_context *next) |
437 | coro_transfer (coro_context *prev, coro_context *next) |
343 | { |
438 | { |
344 | pthread_cond_signal (&next->cv); |
439 | pthread_cond_signal (&next->cv); |
345 | pthread_cond_wait (&prev->cv, &coro_mutex); |
440 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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441 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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442 | pthread_testcancel (); |
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443 | #endif |
346 | } |
444 | } |
347 | |
445 | |
348 | void |
446 | void |
349 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
447 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
350 | { |
448 | { |
351 | static coro_context nctx; |
449 | static coro_context nctx; |
352 | static int once; |
450 | static int once; |
353 | |
451 | |
354 | if (!once) |
452 | if (!once) |
… | |
… | |
371 | args.arg = arg; |
469 | args.arg = arg; |
372 | args.self = ctx; |
470 | args.self = ctx; |
373 | args.main = &nctx; |
471 | args.main = &nctx; |
374 | |
472 | |
375 | pthread_attr_init (&attr); |
473 | pthread_attr_init (&attr); |
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474 | #if __UCLIBC__ |
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475 | /* exists, but is borked */ |
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476 | /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ |
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477 | #elif __CYGWIN__ |
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478 | /* POSIX, not here */ |
|
|
479 | pthread_attr_setstacksize (&attr, (size_t)ssize); |
|
|
480 | #else |
376 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
481 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
482 | #endif |
377 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
483 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
378 | pthread_create (&ctx->id, &attr, coro_init, &args); |
484 | pthread_create (&ctx->id, &attr, coro_init, &args); |
379 | |
485 | |
380 | coro_transfer (args.main, args.self); |
486 | coro_transfer (args.main, args.self); |
381 | } |
487 | } |
… | |
… | |
395 | } |
501 | } |
396 | |
502 | |
397 | pthread_cond_destroy (&ctx->cv); |
503 | pthread_cond_destroy (&ctx->cv); |
398 | } |
504 | } |
399 | |
505 | |
|
|
506 | /*****************************************************************************/ |
|
|
507 | /* fiber backend */ |
|
|
508 | /*****************************************************************************/ |
|
|
509 | #elif CORO_FIBER |
|
|
510 | |
|
|
511 | #define WIN32_LEAN_AND_MEAN |
|
|
512 | #if _WIN32_WINNT < 0x0400 |
|
|
513 | #undef _WIN32_WINNT |
|
|
514 | #define _WIN32_WINNT 0x0400 |
|
|
515 | #endif |
|
|
516 | #include <windows.h> |
|
|
517 | |
|
|
518 | VOID CALLBACK |
|
|
519 | coro_init (PVOID arg) |
|
|
520 | { |
|
|
521 | coro_context *ctx = (coro_context *)arg; |
|
|
522 | |
|
|
523 | ctx->coro (ctx->arg); |
|
|
524 | } |
|
|
525 | |
|
|
526 | void |
|
|
527 | coro_transfer (coro_context *prev, coro_context *next) |
|
|
528 | { |
|
|
529 | if (!prev->fiber) |
|
|
530 | { |
|
|
531 | prev->fiber = GetCurrentFiber (); |
|
|
532 | |
|
|
533 | if (prev->fiber == 0 || prev->fiber == (void *)0x1e00) |
|
|
534 | prev->fiber = ConvertThreadToFiber (0); |
|
|
535 | } |
|
|
536 | |
|
|
537 | SwitchToFiber (next->fiber); |
|
|
538 | } |
|
|
539 | |
|
|
540 | void |
|
|
541 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, size_t ssize) |
|
|
542 | { |
|
|
543 | ctx->fiber = 0; |
|
|
544 | ctx->coro = coro; |
|
|
545 | ctx->arg = arg; |
|
|
546 | |
|
|
547 | if (!coro) |
|
|
548 | return; |
|
|
549 | |
|
|
550 | ctx->fiber = CreateFiber (ssize, coro_init, ctx); |
|
|
551 | } |
|
|
552 | |
|
|
553 | void |
|
|
554 | coro_destroy (coro_context *ctx) |
|
|
555 | { |
|
|
556 | DeleteFiber (ctx->fiber); |
|
|
557 | } |
|
|
558 | |
400 | #else |
559 | #else |
401 | # error unsupported backend |
560 | #error unsupported backend |
|
|
561 | #endif |
|
|
562 | |
|
|
563 | /*****************************************************************************/ |
|
|
564 | /* stack management */ |
|
|
565 | /*****************************************************************************/ |
|
|
566 | #if CORO_STACKALLOC |
|
|
567 | |
|
|
568 | #include <stdlib.h> |
|
|
569 | |
|
|
570 | #ifndef _WIN32 |
|
|
571 | # include <unistd.h> |
|
|
572 | #endif |
|
|
573 | |
|
|
574 | #if CORO_USE_VALGRIND |
|
|
575 | # include <valgrind/valgrind.h> |
|
|
576 | #endif |
|
|
577 | |
|
|
578 | #if _POSIX_MAPPED_FILES |
|
|
579 | # include <sys/mman.h> |
|
|
580 | # define CORO_MMAP 1 |
|
|
581 | # ifndef MAP_ANONYMOUS |
|
|
582 | # ifdef MAP_ANON |
|
|
583 | # define MAP_ANONYMOUS MAP_ANON |
|
|
584 | # else |
|
|
585 | # undef CORO_MMAP |
|
|
586 | # endif |
402 | #endif |
587 | # endif |
|
|
588 | # include <limits.h> |
|
|
589 | #else |
|
|
590 | # undef CORO_MMAP |
|
|
591 | #endif |
403 | |
592 | |
|
|
593 | #if _POSIX_MEMORY_PROTECTION |
|
|
594 | # ifndef CORO_GUARDPAGES |
|
|
595 | # define CORO_GUARDPAGES 4 |
|
|
596 | # endif |
|
|
597 | #else |
|
|
598 | # undef CORO_GUARDPAGES |
|
|
599 | #endif |
|
|
600 | |
|
|
601 | #if !CORO_MMAP |
|
|
602 | # undef CORO_GUARDPAGES |
|
|
603 | #endif |
|
|
604 | |
|
|
605 | #if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 |
|
|
606 | # undef CORO_GUARDPAGES |
|
|
607 | #endif |
|
|
608 | |
|
|
609 | #ifndef CORO_GUARDPAGES |
|
|
610 | # define CORO_GUARDPAGES 0 |
|
|
611 | #endif |
|
|
612 | |
|
|
613 | #if !PAGESIZE |
|
|
614 | #if !CORO_MMAP |
|
|
615 | #define PAGESIZE 4096 |
|
|
616 | #else |
|
|
617 | static size_t |
|
|
618 | coro_pagesize (void) |
|
|
619 | { |
|
|
620 | static size_t pagesize; |
|
|
621 | |
|
|
622 | if (!pagesize) |
|
|
623 | pagesize = sysconf (_SC_PAGESIZE); |
|
|
624 | |
|
|
625 | return pagesize; |
|
|
626 | } |
|
|
627 | |
|
|
628 | #define PAGESIZE coro_pagesize () |
|
|
629 | #endif |
|
|
630 | #endif |
|
|
631 | |
|
|
632 | int |
|
|
633 | coro_stack_alloc (struct coro_stack *stack, unsigned int size) |
|
|
634 | { |
|
|
635 | if (!size) |
|
|
636 | size = 256 * 1024; |
|
|
637 | |
|
|
638 | stack->sptr = 0; |
|
|
639 | stack->ssze = ((size_t)size * sizeof (void *) + PAGESIZE - 1) / PAGESIZE * PAGESIZE; |
|
|
640 | |
|
|
641 | #if CORO_FIBER |
|
|
642 | |
|
|
643 | stack->sptr = (void *)stack; |
|
|
644 | return 1; |
|
|
645 | |
|
|
646 | #else |
|
|
647 | |
|
|
648 | size_t ssze = stack->ssze + CORO_GUARDPAGES * PAGESIZE; |
|
|
649 | void *base; |
|
|
650 | |
|
|
651 | #if CORO_MMAP |
|
|
652 | /* mmap supposedly does allocate-on-write for us */ |
|
|
653 | base = mmap (0, ssze, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
654 | |
|
|
655 | if (base == (void *)-1) |
|
|
656 | { |
|
|
657 | /* some systems don't let us have executable heap */ |
|
|
658 | /* we assume they won't need executable stack in that case */ |
|
|
659 | base = mmap (0, ssze, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
|
|
660 | |
|
|
661 | if (base == (void *)-1) |
|
|
662 | return 0; |
|
|
663 | } |
|
|
664 | |
|
|
665 | #if CORO_GUARDPAGES |
|
|
666 | mprotect (base, CORO_GUARDPAGES * PAGESIZE, PROT_NONE); |
|
|
667 | #endif |
|
|
668 | |
|
|
669 | base = (void*)((char *)base + CORO_GUARDPAGES * PAGESIZE); |
|
|
670 | #else |
|
|
671 | base = malloc (ssze); |
|
|
672 | if (!base) |
|
|
673 | return 0; |
|
|
674 | #endif |
|
|
675 | |
|
|
676 | #if CORO_USE_VALGRIND |
|
|
677 | stack->valgrind_id = VALGRIND_STACK_REGISTER ((char *)base, ((char *)base) + ssze - CORO_GUARDPAGES * PAGESIZE); |
|
|
678 | #endif |
|
|
679 | |
|
|
680 | stack->sptr = base; |
|
|
681 | return 1; |
|
|
682 | |
|
|
683 | #endif |
|
|
684 | } |
|
|
685 | |
|
|
686 | void |
|
|
687 | coro_stack_free (struct coro_stack *stack) |
|
|
688 | { |
|
|
689 | #if CORO_FIBER |
|
|
690 | /* nop */ |
|
|
691 | #else |
|
|
692 | #if CORO_USE_VALGRIND |
|
|
693 | VALGRIND_STACK_DEREGISTER (stack->valgrind_id); |
|
|
694 | #endif |
|
|
695 | |
|
|
696 | #if CORO_MMAP |
|
|
697 | if (stack->sptr) |
|
|
698 | munmap ((void*)((char *)stack->sptr - CORO_GUARDPAGES * PAGESIZE), |
|
|
699 | stack->ssze + CORO_GUARDPAGES * PAGESIZE); |
|
|
700 | #else |
|
|
701 | free (stack->sptr); |
|
|
702 | #endif |
|
|
703 | #endif |
|
|
704 | } |
|
|
705 | |
|
|
706 | #endif |
|
|
707 | |