1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2006 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2008 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 | * |
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14 | * 3. The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
13 | * |
17 | * 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 |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 | * 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- |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
20 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
21 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
22 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
23 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * |
24 | * |
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25 | * Alternatively, the contents of this file may be used under the terms of |
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26 | * the GNU General Public License ("GPL") version 2 or any later version, |
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27 | * in which case the provisions of the GPL are applicable instead of |
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28 | * the above. If you wish to allow the use of your version of this file |
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29 | * only under the terms of the GPL and not to allow others to use your |
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30 | * version of this file under the BSD license, indicate your decision |
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31 | * by deleting the provisions above and replace them with the notice |
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32 | * and other provisions required by the GPL. If you do not delete the |
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33 | * provisions above, a recipient may use your version of this file under |
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34 | * either the BSD or the GPL. |
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35 | * |
28 | * This library is modelled strictly after Ralf S. Engelschalls article at |
36 | * This library is modelled strictly after Ralf S. Engelschalls article at |
29 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
37 | * http://www.gnu.org/software/pth/rse-pmt.ps. So most of the credit must |
30 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
31 | */ |
39 | */ |
32 | |
40 | |
33 | #include "coro.h" |
41 | #include "coro.h" |
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42 | |
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43 | #include <string.h> |
34 | |
44 | |
35 | #if !defined(STACK_ADJUST_PTR) |
45 | #if !defined(STACK_ADJUST_PTR) |
36 | /* IRIX is decidedly NON-unix */ |
46 | /* IRIX is decidedly NON-unix */ |
37 | # if __sgi |
47 | # if __sgi |
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
48 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
49 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
40 | # elif __i386__ && CORO_LINUX |
50 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
51 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
52 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
43 | # elif __amd64__ && CORO_LINUX |
53 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
44 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
54 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
55 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # else |
56 | # else |
47 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
57 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
48 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
58 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
… | |
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53 | # include <stddef.h> |
63 | # include <stddef.h> |
54 | #endif |
64 | #endif |
55 | |
65 | |
56 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
66 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
57 | |
67 | |
58 | #include <stdlib.h> |
68 | # include <stdlib.h> |
59 | |
69 | |
60 | #if CORO_SJLJ |
70 | # if CORO_SJLJ |
61 | # include <stdio.h> |
71 | # include <stdio.h> |
62 | # include <signal.h> |
72 | # include <signal.h> |
63 | # include <unistd.h> |
73 | # include <unistd.h> |
64 | #endif |
74 | # endif |
65 | |
75 | |
66 | static volatile coro_func coro_init_func; |
76 | static volatile coro_func coro_init_func; |
67 | static volatile void *coro_init_arg; |
77 | static volatile void *coro_init_arg; |
68 | static volatile coro_context *new_coro, *create_coro; |
78 | static volatile coro_context *new_coro, *create_coro; |
69 | |
79 | |
70 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
80 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
71 | /* instead, check for gcc 3 and ELF and hope for the best */ |
81 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
72 | #if __GNUC__ >= 3 && __ELF__ |
82 | # if __GNUC__ >= 3 && __ELF__ && __linux__ |
73 | # define HAVE_CFI 1 |
83 | # define HAVE_CFI 1 |
74 | #endif |
84 | # endif |
75 | |
85 | |
76 | static void |
86 | static void |
77 | coro_init (void) |
87 | coro_init (void) |
78 | { |
88 | { |
79 | volatile coro_func func = coro_init_func; |
89 | volatile coro_func func = coro_init_func; |
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95 | static void |
105 | static void |
96 | trampoline (int sig) |
106 | trampoline (int sig) |
97 | { |
107 | { |
98 | if (setjmp (((coro_context *)new_coro)->env)) |
108 | if (setjmp (((coro_context *)new_coro)->env)) |
99 | { |
109 | { |
100 | #if HAVE_CFI |
110 | # if HAVE_CFI |
101 | asm (".cfi_startproc"); |
111 | asm (".cfi_startproc"); |
102 | #endif |
112 | # endif |
103 | coro_init (); /* start it */ |
113 | coro_init (); /* start it */ |
104 | #if HAVE_CFI |
114 | # if HAVE_CFI |
105 | asm (".cfi_endproc"); |
115 | asm (".cfi_endproc"); |
106 | #endif |
116 | # endif |
107 | } |
117 | } |
108 | else |
118 | else |
109 | trampoline_count++; |
119 | trampoline_count++; |
110 | } |
120 | } |
111 | |
121 | |
112 | # endif |
122 | # endif |
113 | |
123 | |
114 | #endif |
124 | #endif |
115 | |
125 | |
116 | #if CORO_ASM |
126 | #if CORO_ASM |
117 | void __attribute__((__noinline__, __fastcall__)) |
127 | |
118 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
128 | asm ( |
119 | { |
129 | ".text\n" |
120 | asm volatile ( |
130 | ".globl coro_transfer\n" |
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131 | ".type coro_transfer, @function\n" |
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132 | "coro_transfer:\n" |
121 | #if __amd64 |
133 | # if __amd64 |
122 | # define NUM_CLOBBERED 5 |
134 | # define NUM_SAVED 6 |
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135 | "\tpush %rbp\n" |
123 | "push %%rbx\n\t" |
136 | "\tpush %rbx\n" |
124 | "push %%r12\n\t" |
137 | "\tpush %r12\n" |
125 | "push %%r13\n\t" |
138 | "\tpush %r13\n" |
126 | "push %%r14\n\t" |
139 | "\tpush %r14\n" |
127 | "push %%r15\n\t" |
140 | "\tpush %r15\n" |
128 | "mov %%rsp, %0\n\t" |
141 | "\tmov %rsp, (%rdi)\n" |
129 | "mov %1, %%rsp\n\t" |
142 | "\tmov (%rsi), %rsp\n" |
130 | "pop %%r15\n\t" |
143 | "\tpop %r15\n" |
131 | "pop %%r14\n\t" |
144 | "\tpop %r14\n" |
132 | "pop %%r13\n\t" |
145 | "\tpop %r13\n" |
133 | "pop %%r12\n\t" |
146 | "\tpop %r12\n" |
134 | "pop %%rbx\n\t" |
147 | "\tpop %rbx\n" |
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148 | "\tpop %rbp\n" |
135 | #elif __i386 |
149 | # elif __i386 |
136 | # define NUM_CLOBBERED 4 |
150 | # define NUM_SAVED 4 |
137 | "push %%ebx\n\t" |
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138 | "push %%esi\n\t" |
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139 | "push %%edi\n\t" |
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140 | "push %%ebp\n\t" |
151 | "\tpush %ebp\n" |
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152 | "\tpush %ebx\n" |
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153 | "\tpush %esi\n" |
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154 | "\tpush %edi\n" |
141 | "mov %%esp, %0\n\t" |
155 | "\tmov %esp, (%eax)\n" |
142 | "mov %1, %%esp\n\t" |
156 | "\tmov (%edx), %esp\n" |
143 | "pop %%ebp\n\t" |
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144 | "pop %%edi\n\t" |
157 | "\tpop %edi\n" |
145 | "pop %%esi\n\t" |
158 | "\tpop %esi\n" |
146 | "pop %%ebx\n\t" |
159 | "\tpop %ebx\n" |
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160 | "\tpop %ebp\n" |
147 | #else |
161 | # else |
148 | # error unsupported architecture |
162 | # error unsupported architecture |
149 | #endif |
163 | # endif |
150 | : "=m" (prev->sp) |
164 | "\tret\n" |
151 | : "m" (next->sp) |
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152 | ); |
165 | ); |
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166 | |
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167 | #endif |
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168 | |
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169 | #if CORO_PTHREAD |
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170 | |
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171 | /* this mutex will be locked by the running coroutine */ |
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172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
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173 | |
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174 | struct coro_init_args |
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175 | { |
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176 | coro_func func; |
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177 | void *arg; |
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178 | coro_context *self, *main; |
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179 | }; |
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180 | |
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181 | static pthread_t null_tid; |
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182 | |
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183 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
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184 | static void |
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185 | mutex_unlock_wrapper (void *arg) |
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186 | { |
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187 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
153 | } |
188 | } |
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189 | |
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190 | static void * |
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191 | trampoline (void *args_) |
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192 | { |
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193 | struct coro_init_args *args = (struct coro_init_args *)args_; |
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194 | coro_func func = args->func; |
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195 | void *arg = args->arg; |
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196 | |
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197 | pthread_mutex_lock (&coro_mutex); |
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198 | |
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199 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
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200 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
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201 | coro_transfer (args->self, args->main); |
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202 | func (arg); |
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203 | pthread_cleanup_pop (1); |
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204 | |
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205 | return 0; |
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206 | } |
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207 | |
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208 | void |
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209 | coro_transfer (coro_context *prev, coro_context *next) |
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210 | { |
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211 | pthread_cond_signal (&next->cv); |
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212 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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213 | } |
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214 | |
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215 | void |
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216 | coro_destroy (coro_context *ctx) |
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217 | { |
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218 | if (!pthread_equal (ctx->id, null_tid)) |
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219 | { |
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220 | pthread_cancel (ctx->id); |
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221 | pthread_mutex_unlock (&coro_mutex); |
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222 | pthread_join (ctx->id, 0); |
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223 | pthread_mutex_lock (&coro_mutex); |
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224 | } |
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225 | |
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226 | pthread_cond_destroy (&ctx->cv); |
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227 | } |
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228 | |
154 | #endif |
229 | #endif |
155 | |
230 | |
156 | /* initialize a machine state */ |
231 | /* initialize a machine state */ |
157 | void coro_create (coro_context *ctx, |
232 | void |
158 | coro_func coro, void *arg, |
233 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
159 | void *sptr, long ssize) |
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160 | { |
234 | { |
161 | #if CORO_UCONTEXT |
235 | #if CORO_UCONTEXT |
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236 | |
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237 | if (!coro) |
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238 | return; |
162 | |
239 | |
163 | getcontext (&(ctx->uc)); |
240 | getcontext (&(ctx->uc)); |
164 | |
241 | |
165 | ctx->uc.uc_link = 0; |
242 | ctx->uc.uc_link = 0; |
166 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
243 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
167 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
244 | ctx->uc.uc_stack.ss_size = (size_t)STACK_ADJUST_SIZE (sptr,ssize); |
168 | ctx->uc.uc_stack.ss_flags = 0; |
245 | ctx->uc.uc_stack.ss_flags = 0; |
169 | |
246 | |
170 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
247 | makecontext (&(ctx->uc), (void (*)())coro, 1, arg); |
171 | |
248 | |
172 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
249 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
173 | |
250 | |
174 | # if CORO_SJLJ |
251 | # if CORO_SJLJ |
175 | stack_t ostk, nstk; |
252 | stack_t ostk, nstk; |
176 | struct sigaction osa, nsa; |
253 | struct sigaction osa, nsa; |
177 | sigset_t nsig, osig; |
254 | sigset_t nsig, osig; |
178 | # endif |
255 | # endif |
179 | coro_context nctx; |
256 | coro_context nctx; |
180 | |
257 | |
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258 | if (!coro) |
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259 | return; |
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260 | |
181 | coro_init_func = coro; |
261 | coro_init_func = coro; |
182 | coro_init_arg = arg; |
262 | coro_init_arg = arg; |
183 | |
263 | |
184 | new_coro = ctx; |
264 | new_coro = ctx; |
185 | create_coro = &nctx; |
265 | create_coro = &nctx; |
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237 | |
317 | |
238 | # elif CORO_LOSER |
318 | # elif CORO_LOSER |
239 | |
319 | |
240 | setjmp (ctx->env); |
320 | setjmp (ctx->env); |
241 | #if __CYGWIN__ |
321 | #if __CYGWIN__ |
242 | ctx->env[7] = (long)((char *)sptr + ssize); |
322 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
243 | ctx->env[8] = (long)coro_init; |
323 | ctx->env[8] = (long)coro_init; |
244 | #elif defined(_M_IX86) |
324 | #elif defined(_M_IX86) |
245 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
325 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
246 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
326 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
247 | #elif defined(_M_AMD64) |
327 | #elif defined(_M_AMD64) |
248 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
328 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
249 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
329 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
250 | #elif defined(_M_IA64) |
330 | #elif defined(_M_IA64) |
251 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
331 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
252 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
332 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
253 | #else |
333 | #else |
254 | #error "microsoft libc or architecture not supported" |
334 | # error "microsoft libc or architecture not supported" |
255 | #endif |
335 | #endif |
256 | |
336 | |
257 | # elif CORO_LINUX |
337 | # elif CORO_LINUX |
258 | |
338 | |
259 | _setjmp (ctx->env); |
339 | _setjmp (ctx->env); |
260 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
340 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
261 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
341 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
262 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
342 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
263 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
343 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
264 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
344 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
265 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
345 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
266 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
346 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
267 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
347 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
268 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
348 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
269 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
349 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
270 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
350 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
271 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
351 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
272 | #else |
352 | #else |
273 | # error "linux libc or architecture not supported" |
353 | # error "linux libc or architecture not supported" |
274 | #endif |
354 | #endif |
275 | |
355 | |
276 | # elif CORO_IRIX |
356 | # elif CORO_IRIX |
277 | |
357 | |
278 | setjmp (ctx->env); |
358 | setjmp (ctx->env); |
279 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
359 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
280 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
360 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
281 | |
361 | |
282 | # elif CORO_ASM |
362 | # elif CORO_ASM |
283 | |
363 | |
284 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
364 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
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365 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
285 | *--ctx->sp = (void *)coro_init; |
366 | *--ctx->sp = (void *)coro_init; |
286 | *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp |
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287 | ctx->sp -= NUM_CLOBBERED; |
367 | ctx->sp -= NUM_SAVED; |
288 | |
368 | |
289 | # endif |
369 | # endif |
290 | |
370 | |
291 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
371 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
292 | |
372 | |
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373 | # elif CORO_PTHREAD |
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374 | |
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375 | static coro_context nctx; |
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376 | static int once; |
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377 | |
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378 | if (!once) |
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379 | { |
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380 | once = 1; |
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381 | |
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382 | pthread_mutex_lock (&coro_mutex); |
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383 | pthread_cond_init (&nctx.cv, 0); |
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384 | null_tid = pthread_self (); |
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385 | } |
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386 | |
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387 | pthread_cond_init (&ctx->cv, 0); |
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388 | |
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389 | if (coro) |
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390 | { |
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391 | pthread_attr_t attr; |
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392 | struct coro_init_args args; |
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393 | |
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394 | args.func = coro; |
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395 | args.arg = arg; |
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396 | args.self = ctx; |
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397 | args.main = &nctx; |
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398 | |
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399 | pthread_attr_init (&attr); |
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400 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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401 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
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402 | pthread_create (&ctx->id, &attr, trampoline, &args); |
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403 | |
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404 | coro_transfer (args.main, args.self); |
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405 | } |
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406 | else |
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407 | ctx->id = null_tid; |
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408 | |
293 | #else |
409 | #else |
294 | # error unsupported architecture |
410 | # error unsupported backend |
295 | #endif |
411 | #endif |
296 | } |
412 | } |
297 | |
413 | |