1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2009 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, |
… | |
… | |
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 <string.h> |
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44 | |
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45 | /*****************************************************************************/ |
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46 | /* ucontext/setjmp/asm backends */ |
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47 | /*****************************************************************************/ |
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48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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49 | |
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50 | # if CORO_UCONTEXT |
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51 | # include <stddef.h> |
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52 | # endif |
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53 | |
43 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
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55 | # if __sgi |
44 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
45 | # if __sgi |
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46 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
47 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
48 | # elif __i386__ && CORO_LINUX |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
49 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
50 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
51 | # elif __amd64__ && CORO_LINUX |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
52 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
53 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
54 | # else |
65 | # else |
55 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
56 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
57 | # endif |
68 | # endif |
58 | #endif |
69 | # endif |
59 | |
70 | |
60 | #if CORO_UCONTEXT |
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61 | # include <stddef.h> |
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62 | #endif |
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63 | |
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64 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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65 | |
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66 | #include <stdlib.h> |
71 | # include <stdlib.h> |
67 | |
72 | |
68 | #if CORO_SJLJ |
73 | # if CORO_SJLJ |
69 | # include <stdio.h> |
74 | # include <stdio.h> |
70 | # include <signal.h> |
75 | # include <signal.h> |
71 | # include <unistd.h> |
76 | # include <unistd.h> |
72 | #endif |
77 | # endif |
73 | |
78 | |
74 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
75 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
76 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
77 | |
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78 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
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79 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
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80 | #if __GNUC__ >= 3 && __ELF__ && __linux__ |
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81 | # define HAVE_CFI 1 |
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82 | #endif |
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83 | |
82 | |
84 | static void |
83 | static void |
85 | coro_init (void) |
84 | coro_init (void) |
86 | { |
85 | { |
87 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
88 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
89 | |
88 | |
90 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
91 | |
90 | |
92 | func ((void *)arg); |
91 | func ((void *)arg); |
93 | |
92 | |
94 | /* the new coro returned. bad. just abort() for now */ |
93 | /* the new coro returned. bad. just abort() for now */ |
95 | abort (); |
94 | abort (); |
96 | } |
95 | } |
97 | |
96 | |
98 | # if CORO_SJLJ |
97 | # if CORO_SJLJ |
99 | |
98 | |
100 | static volatile int trampoline_count; |
99 | static volatile int trampoline_done; |
101 | |
100 | |
102 | /* trampoline signal handler */ |
101 | /* trampoline signal handler */ |
103 | static void |
102 | static void |
104 | trampoline (int sig) |
103 | trampoline (int sig) |
105 | { |
104 | { |
106 | if (setjmp (((coro_context *)new_coro)->env)) |
105 | if (coro_setjmp (new_coro->env)) |
107 | { |
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108 | #if HAVE_CFI |
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109 | asm (".cfi_startproc"); |
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110 | #endif |
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111 | coro_init (); /* start it */ |
106 | coro_init (); /* start it */ |
112 | #if HAVE_CFI |
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113 | asm (".cfi_endproc"); |
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114 | #endif |
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115 | } |
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116 | else |
107 | else |
117 | trampoline_count++; |
108 | trampoline_done = 1; |
118 | } |
109 | } |
119 | |
110 | |
120 | # endif |
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121 | |
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122 | #endif |
111 | # endif |
123 | |
112 | |
124 | #if CORO_ASM |
113 | # if CORO_ASM |
125 | void __attribute__((__noinline__, __fastcall__)) |
114 | |
126 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
115 | asm ( |
127 | { |
116 | ".text\n" |
128 | asm volatile ( |
117 | ".globl coro_transfer\n" |
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118 | ".type coro_transfer, @function\n" |
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119 | "coro_transfer:\n" |
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120 | /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ |
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121 | /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ |
129 | #if __amd64 |
122 | #if __amd64 |
130 | # define NUM_CLOBBERED 5 |
123 | #define NUM_SAVED 6 |
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124 | "\tpush %rbp\n" |
131 | "push %%rbx\n\t" |
125 | "\tpush %rbx\n" |
132 | "push %%r12\n\t" |
126 | "\tpush %r12\n" |
133 | "push %%r13\n\t" |
127 | "\tpush %r13\n" |
134 | "push %%r14\n\t" |
128 | "\tpush %r14\n" |
135 | "push %%r15\n\t" |
129 | "\tpush %r15\n" |
136 | "mov %%rsp, %0\n\t" |
130 | #if CORO_WIN_TIB |
137 | "mov %1, %%rsp\n\t" |
131 | "\tpush %gs:0x0\n" |
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132 | "\tpush %gs:0x8\n" |
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133 | "\tpush %gs:0xc\n" |
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134 | #endif |
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135 | "\tmov %rsp, (%rdi)\n" |
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136 | "\tmov (%rsi), %rsp\n" |
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137 | #if CORO_WIN_TIB |
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138 | "\tpop %gs:0xc\n" |
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139 | "\tpop %gs:0x8\n" |
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140 | "\tpop %gs:0x0\n" |
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141 | #endif |
138 | "pop %%r15\n\t" |
142 | "\tpop %r15\n" |
139 | "pop %%r14\n\t" |
143 | "\tpop %r14\n" |
140 | "pop %%r13\n\t" |
144 | "\tpop %r13\n" |
141 | "pop %%r12\n\t" |
145 | "\tpop %r12\n" |
142 | "pop %%rbx\n\t" |
146 | "\tpop %rbx\n" |
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147 | "\tpop %rbp\n" |
143 | #elif __i386 |
148 | #elif __i386 |
144 | # define NUM_CLOBBERED 4 |
149 | #define NUM_SAVED 4 |
145 | "push %%ebx\n\t" |
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146 | "push %%esi\n\t" |
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147 | "push %%edi\n\t" |
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148 | "push %%ebp\n\t" |
150 | "\tpush %ebp\n" |
149 | "mov %%esp, %0\n\t" |
151 | "\tpush %ebx\n" |
150 | "mov %1, %%esp\n\t" |
152 | "\tpush %esi\n" |
151 | "pop %%ebp\n\t" |
153 | "\tpush %edi\n" |
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154 | #if CORO_WIN_TIB |
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155 | "\tpush %fs:0\n" |
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156 | "\tpush %fs:4\n" |
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157 | "\tpush %fs:8\n" |
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158 | #endif |
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159 | "\tmov %esp, (%eax)\n" |
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160 | "\tmov (%edx), %esp\n" |
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161 | #if CORO_WIN_TIB |
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162 | "\tpop %fs:8\n" |
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163 | "\tpop %fs:4\n" |
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164 | "\tpop %fs:0\n" |
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165 | #endif |
152 | "pop %%edi\n\t" |
166 | "\tpop %edi\n" |
153 | "pop %%esi\n\t" |
167 | "\tpop %esi\n" |
154 | "pop %%ebx\n\t" |
168 | "\tpop %ebx\n" |
155 | #else |
169 | "\tpop %ebp\n" |
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170 | #else |
156 | # error unsupported architecture |
171 | #error unsupported architecture |
157 | #endif |
172 | #endif |
158 | : "=m" (prev->sp) |
173 | "\tret\n" |
159 | : "m" (next->sp) |
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160 | ); |
174 | ); |
161 | } |
175 | |
162 | #endif |
176 | # endif |
163 | |
177 | |
164 | #if CORO_PTHREAD |
178 | void |
165 | |
179 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
166 | struct coro_init_args { |
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167 | coro_func func; |
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168 | void *arg; |
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169 | coro_context *self, *main; |
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170 | }; |
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171 | |
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172 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
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173 | |
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174 | static void * |
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175 | trampoline (void *args_) |
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176 | { |
180 | { |
177 | struct coro_init_args *args = (struct coro_init_args *)args_; |
181 | coro_context nctx; |
178 | coro_func func = args->func; |
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179 | void *arg = args->arg; |
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180 | |
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181 | pthread_mutex_lock (&coro_mutex); |
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182 | pthread_cond_destroy (&args->self->c); |
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183 | coro_transfer (args->self, args->main); |
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184 | func (arg); |
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185 | pthread_mutex_unlock (&coro_mutex); |
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186 | |
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187 | return 0; |
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188 | } |
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189 | |
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190 | void coro_transfer(coro_context *prev, coro_context *next) |
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191 | { |
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192 | pthread_cond_init (&prev->c, 0); |
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193 | pthread_cond_signal (&next->c); |
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194 | pthread_cond_wait (&prev->c, &coro_mutex); |
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195 | pthread_cond_destroy (&prev->c); |
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196 | } |
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197 | |
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198 | #endif |
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199 | |
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200 | /* initialize a machine state */ |
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201 | void coro_create (coro_context *ctx, |
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202 | coro_func coro, void *arg, |
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203 | void *sptr, long ssize) |
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204 | { |
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205 | #if CORO_UCONTEXT |
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206 | |
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207 | getcontext (&(ctx->uc)); |
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208 | |
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209 | ctx->uc.uc_link = 0; |
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210 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
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211 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
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212 | ctx->uc.uc_stack.ss_flags = 0; |
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213 | |
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214 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
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215 | |
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216 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
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217 | |
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218 | # if CORO_SJLJ |
182 | # if CORO_SJLJ |
219 | stack_t ostk, nstk; |
183 | stack_t ostk, nstk; |
220 | struct sigaction osa, nsa; |
184 | struct sigaction osa, nsa; |
221 | sigset_t nsig, osig; |
185 | sigset_t nsig, osig; |
222 | # endif |
186 | # endif |
223 | coro_context nctx; |
187 | |
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188 | if (!coro) |
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189 | return; |
224 | |
190 | |
225 | coro_init_func = coro; |
191 | coro_init_func = coro; |
226 | coro_init_arg = arg; |
192 | coro_init_arg = arg; |
227 | |
193 | |
228 | new_coro = ctx; |
194 | new_coro = ctx; |
… | |
… | |
254 | { |
220 | { |
255 | perror ("sigaltstack"); |
221 | perror ("sigaltstack"); |
256 | abort (); |
222 | abort (); |
257 | } |
223 | } |
258 | |
224 | |
259 | trampoline_count = 0; |
225 | trampoline_done = 0; |
260 | kill (getpid (), SIGUSR2); |
226 | kill (getpid (), SIGUSR2); |
261 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
227 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
262 | |
228 | |
263 | while (!trampoline_count) |
229 | while (!trampoline_done) |
264 | sigsuspend (&nsig); |
230 | sigsuspend (&nsig); |
265 | |
231 | |
266 | sigaltstack (0, &nstk); |
232 | sigaltstack (0, &nstk); |
267 | nstk.ss_flags = SS_DISABLE; |
233 | nstk.ss_flags = SS_DISABLE; |
268 | if (sigaltstack (&nstk, 0) < 0) |
234 | if (sigaltstack (&nstk, 0) < 0) |
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274 | |
240 | |
275 | if (~ostk.ss_flags & SS_DISABLE) |
241 | if (~ostk.ss_flags & SS_DISABLE) |
276 | sigaltstack (&ostk, 0); |
242 | sigaltstack (&ostk, 0); |
277 | |
243 | |
278 | sigaction (SIGUSR2, &osa, 0); |
244 | sigaction (SIGUSR2, &osa, 0); |
279 | |
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280 | sigprocmask (SIG_SETMASK, &osig, 0); |
245 | sigprocmask (SIG_SETMASK, &osig, 0); |
281 | |
246 | |
282 | # elif CORO_LOSER |
247 | # elif CORO_LOSER |
283 | |
248 | |
284 | setjmp (ctx->env); |
249 | coro_setjmp (ctx->env); |
285 | #if __CYGWIN__ |
250 | #if __CYGWIN__ && __i386 |
286 | ctx->env[7] = (long)((char *)sptr + ssize); |
251 | ctx->env[8] = (long) coro_init; |
287 | ctx->env[8] = (long)coro_init; |
252 | ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); |
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253 | #elif __CYGWIN__ && __x86_64 |
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254 | ctx->env[7] = (long) coro_init; |
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255 | ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); |
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256 | #elif defined(__MINGW32__) |
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257 | ctx->env[5] = (long) coro_init; |
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258 | ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); |
288 | #elif defined(_M_IX86) |
259 | #elif defined(_M_IX86) |
289 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
260 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; |
290 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); |
261 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
291 | #elif defined(_M_AMD64) |
262 | #elif defined(_M_AMD64) |
292 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
263 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; |
293 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
264 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
294 | #elif defined(_M_IA64) |
265 | #elif defined(_M_IA64) |
295 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
266 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; |
296 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); |
267 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); |
297 | #else |
268 | #else |
298 | # error "microsoft libc or architecture not supported" |
269 | #error "microsoft libc or architecture not supported" |
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270 | #endif |
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271 | |
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272 | # elif CORO_LINUX |
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273 | |
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274 | coro_setjmp (ctx->env); |
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275 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
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276 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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277 | ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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278 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
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279 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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280 | ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long); |
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281 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
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282 | ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init; |
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283 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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284 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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285 | ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init; |
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286 | ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long); |
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287 | #else |
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288 | #error "linux libc or architecture not supported" |
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289 | #endif |
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290 | |
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291 | # elif CORO_IRIX |
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292 | |
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293 | coro_setjmp (ctx->env, 0); |
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294 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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295 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
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296 | |
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297 | # elif CORO_ASM |
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298 | |
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299 | ctx->sp = (void **)(ssize + (char *)sptr); |
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300 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
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301 | *--ctx->sp = (void *)coro_init; |
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302 | |
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303 | #if CORO_WIN_TIB |
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304 | *--ctx->sp = 0; /* ExceptionList */ |
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305 | *--ctx->sp = (char *)sptr + ssize; /* StackBase */ |
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306 | *--ctx->sp = sptr; /* StackLimit */ |
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307 | #endif |
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308 | |
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309 | ctx->sp -= NUM_SAVED; |
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310 | |
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311 | # elif CORO_UCONTEXT |
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312 | |
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313 | getcontext (&(ctx->uc)); |
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314 | |
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315 | ctx->uc.uc_link = 0; |
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316 | ctx->uc.uc_stack.ss_sp = sptr; |
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317 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
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318 | ctx->uc.uc_stack.ss_flags = 0; |
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319 | |
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320 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
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321 | |
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322 | # endif |
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323 | |
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324 | coro_transfer (create_coro, new_coro); |
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325 | } |
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326 | |
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327 | /*****************************************************************************/ |
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328 | /* pthread backend */ |
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329 | /*****************************************************************************/ |
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330 | #elif CORO_PTHREAD |
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331 | |
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332 | /* this mutex will be locked by the running coroutine */ |
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333 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
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334 | |
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335 | struct coro_init_args |
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336 | { |
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337 | coro_func func; |
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338 | void *arg; |
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339 | coro_context *self, *main; |
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340 | }; |
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341 | |
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342 | static pthread_t null_tid; |
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343 | |
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344 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
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345 | static void |
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346 | mutex_unlock_wrapper (void *arg) |
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347 | { |
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348 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
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349 | } |
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350 | |
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351 | static void * |
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352 | coro_init (void *args_) |
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353 | { |
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354 | struct coro_init_args *args = (struct coro_init_args *)args_; |
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355 | coro_func func = args->func; |
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356 | void *arg = args->arg; |
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357 | |
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358 | pthread_mutex_lock (&coro_mutex); |
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359 | |
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360 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
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361 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
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362 | coro_transfer (args->self, args->main); |
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363 | func (arg); |
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364 | pthread_cleanup_pop (1); |
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365 | |
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366 | return 0; |
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367 | } |
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368 | |
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369 | void |
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370 | coro_transfer (coro_context *prev, coro_context *next) |
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371 | { |
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372 | pthread_cond_signal (&next->cv); |
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373 | pthread_cond_wait (&prev->cv, &coro_mutex); |
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374 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
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375 | pthread_testcancel (); |
299 | #endif |
376 | #endif |
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377 | } |
300 | |
378 | |
301 | # elif CORO_LINUX |
379 | void |
302 | |
380 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
303 | _setjmp (ctx->env); |
381 | { |
304 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
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305 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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306 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
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307 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
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308 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
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309 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
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310 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
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311 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
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312 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
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313 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
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314 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
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315 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
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316 | #else |
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317 | # error "linux libc or architecture not supported" |
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318 | #endif |
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319 | |
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320 | # elif CORO_IRIX |
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321 | |
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322 | setjmp (ctx->env); |
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323 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
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324 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
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325 | |
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326 | # elif CORO_ASM |
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327 | |
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328 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
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329 | *--ctx->sp = (void *)coro_init; |
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330 | *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp |
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331 | ctx->sp -= NUM_CLOBBERED; |
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332 | |
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333 | # endif |
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334 | |
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335 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
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336 | |
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337 | # elif CORO_PTHREAD |
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338 | |
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339 | pthread_t id; |
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340 | pthread_attr_t attr; |
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341 | coro_context nctx; |
382 | static coro_context nctx; |
342 | struct coro_init_args args; |
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343 | static int once; |
383 | static int once; |
344 | |
384 | |
345 | if (!once) |
385 | if (!once) |
346 | { |
386 | { |
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387 | once = 1; |
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388 | |
347 | pthread_mutex_lock (&coro_mutex); |
389 | pthread_mutex_lock (&coro_mutex); |
348 | once = 1; |
390 | pthread_cond_init (&nctx.cv, 0); |
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391 | null_tid = pthread_self (); |
349 | } |
392 | } |
350 | |
393 | |
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394 | pthread_cond_init (&ctx->cv, 0); |
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395 | |
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396 | if (coro) |
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397 | { |
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398 | pthread_attr_t attr; |
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399 | struct coro_init_args args; |
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400 | |
351 | args.func = coro; |
401 | args.func = coro; |
352 | args.arg = arg; |
402 | args.arg = arg; |
353 | args.self = ctx; |
403 | args.self = ctx; |
354 | args.main = &nctx; |
404 | args.main = &nctx; |
355 | |
405 | |
356 | pthread_attr_init (&attr); |
406 | pthread_attr_init (&attr); |
357 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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358 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
407 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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408 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
359 | pthread_create (&id, &attr, trampoline, &args); |
409 | pthread_create (&ctx->id, &attr, coro_init, &args); |
360 | |
410 | |
361 | pthread_cond_init (&args.self->c, 0); |
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362 | coro_transfer (args.main, args.self); |
411 | coro_transfer (args.main, args.self); |
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412 | } |
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413 | else |
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414 | ctx->id = null_tid; |
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415 | } |
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416 | |
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417 | void |
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418 | coro_destroy (coro_context *ctx) |
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419 | { |
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420 | if (!pthread_equal (ctx->id, null_tid)) |
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421 | { |
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422 | pthread_cancel (ctx->id); |
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423 | pthread_mutex_unlock (&coro_mutex); |
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424 | pthread_join (ctx->id, 0); |
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425 | pthread_mutex_lock (&coro_mutex); |
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426 | } |
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427 | |
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428 | pthread_cond_destroy (&ctx->cv); |
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429 | } |
363 | |
430 | |
364 | #else |
431 | #else |
365 | # error unsupported backend |
432 | # error unsupported backend |
366 | #endif |
433 | #endif |
367 | } |
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368 | |
434 | |