1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2005 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" |
34 | |
42 | |
35 | #if !defined(STACK_ADJUST_PTR) |
43 | #if !defined(STACK_ADJUST_PTR) |
36 | /* IRIX is decidedly NON-unix */ |
44 | /* IRIX is decidedly NON-unix */ |
37 | # if __sgi |
45 | # if __sgi |
38 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
46 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
39 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
47 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
40 | # elif __i386__ && CORO_LINUX |
48 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
41 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
49 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
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50 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
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51 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
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52 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
42 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
53 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
43 | # else |
54 | # else |
44 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
55 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
45 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
56 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
46 | # endif |
57 | # endif |
47 | #endif |
58 | #endif |
48 | |
59 | |
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60 | #if CORO_UCONTEXT |
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61 | # include <stddef.h> |
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62 | #endif |
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63 | |
49 | #if CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
64 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
50 | |
65 | |
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66 | #include <stdlib.h> |
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67 | |
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68 | #if CORO_SJLJ |
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69 | # include <stdio.h> |
51 | #include <signal.h> |
70 | # include <signal.h> |
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71 | # include <unistd.h> |
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72 | #endif |
52 | |
73 | |
53 | static volatile coro_func coro_init_func; |
74 | static volatile coro_func coro_init_func; |
54 | static volatile void *coro_init_arg; |
75 | static volatile void *coro_init_arg; |
55 | static volatile coro_context *new_coro, *create_coro; |
76 | static volatile coro_context *new_coro, *create_coro; |
56 | |
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 | |
57 | static void |
84 | static void |
58 | coro_init (void) |
85 | coro_init (void) |
59 | { |
86 | { |
60 | volatile coro_func func = coro_init_func; |
87 | volatile coro_func func = coro_init_func; |
61 | volatile void *arg = coro_init_arg; |
88 | volatile void *arg = coro_init_arg; |
… | |
… | |
72 | |
99 | |
73 | static volatile int trampoline_count; |
100 | static volatile int trampoline_count; |
74 | |
101 | |
75 | /* trampoline signal handler */ |
102 | /* trampoline signal handler */ |
76 | static void |
103 | static void |
77 | trampoline(int sig) |
104 | trampoline (int sig) |
78 | { |
105 | { |
79 | if (setjmp (((coro_context *)new_coro)->env)) |
106 | if (setjmp (((coro_context *)new_coro)->env)) |
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107 | { |
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108 | #if HAVE_CFI |
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109 | asm (".cfi_startproc"); |
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110 | #endif |
80 | coro_init (); /* start it */ |
111 | coro_init (); /* start it */ |
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112 | #if HAVE_CFI |
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113 | asm (".cfi_endproc"); |
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114 | #endif |
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115 | } |
81 | else |
116 | else |
82 | trampoline_count++; |
117 | trampoline_count++; |
83 | } |
118 | } |
84 | |
119 | |
85 | # endif |
120 | # endif |
86 | |
121 | |
87 | #endif |
122 | #endif |
88 | |
123 | |
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124 | #if CORO_ASM |
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125 | void __attribute__((__noinline__, __regparm__(2))) |
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126 | coro_transfer (struct coro_context *prev, struct coro_context *next) |
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127 | { |
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128 | asm volatile ( |
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129 | #if __amd64 |
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130 | # define NUM_SAVED 5 |
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131 | "push %%rbx\n\t" |
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132 | "push %%r12\n\t" |
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133 | "push %%r13\n\t" |
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134 | "push %%r14\n\t" |
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135 | "push %%r15\n\t" |
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136 | "mov %%rsp, %0\n\t" |
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137 | "mov %1, %%rsp\n\t" |
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138 | "pop %%r15\n\t" |
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139 | "pop %%r14\n\t" |
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140 | "pop %%r13\n\t" |
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141 | "pop %%r12\n\t" |
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142 | "pop %%rbx\n\t" |
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143 | #elif __i386 |
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144 | # define NUM_SAVED 4 |
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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" |
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149 | "mov %%esp, %0\n\t" |
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150 | "mov %1, %%esp\n\t" |
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151 | "pop %%ebp\n\t" |
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152 | "pop %%edi\n\t" |
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153 | "pop %%esi\n\t" |
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154 | "pop %%ebx\n\t" |
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155 | #else |
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156 | # error unsupported architecture |
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157 | #endif |
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158 | : "=m" (prev->sp) |
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159 | : "m" (next->sp) |
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160 | ); |
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161 | } |
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162 | #endif |
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163 | |
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164 | #if CORO_PTHREAD |
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165 | |
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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 | { |
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177 | struct coro_init_args *args = (struct coro_init_args *)args_; |
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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 | |
89 | /* initialize a machine state */ |
200 | /* initialize a machine state */ |
90 | void coro_create(coro_context *ctx, |
201 | void coro_create (coro_context *ctx, |
91 | coro_func coro, void *arg, |
202 | coro_func coro, void *arg, |
92 | void *sptr, long ssize) |
203 | void *sptr, long ssize) |
93 | { |
204 | { |
94 | #if CORO_UCONTEXT |
205 | #if CORO_UCONTEXT |
95 | |
206 | |
96 | getcontext (&(ctx->uc)); |
207 | getcontext (&(ctx->uc)); |
97 | |
208 | |
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100 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
211 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
101 | ctx->uc.uc_stack.ss_flags = 0; |
212 | ctx->uc.uc_stack.ss_flags = 0; |
102 | |
213 | |
103 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
214 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
104 | |
215 | |
105 | #elif CORO_SJLJ || CORO_LOOSE || CORO_LINUX || CORO_IRIX |
216 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
106 | |
217 | |
107 | # if CORO_SJLJ |
218 | # if CORO_SJLJ |
108 | stack_t ostk, nstk; |
219 | stack_t ostk, nstk; |
109 | struct sigaction osa, nsa; |
220 | struct sigaction osa, nsa; |
110 | sigset_t nsig, osig; |
221 | sigset_t nsig, osig; |
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127 | nsa.sa_handler = trampoline; |
238 | nsa.sa_handler = trampoline; |
128 | sigemptyset (&nsa.sa_mask); |
239 | sigemptyset (&nsa.sa_mask); |
129 | nsa.sa_flags = SA_ONSTACK; |
240 | nsa.sa_flags = SA_ONSTACK; |
130 | |
241 | |
131 | if (sigaction (SIGUSR2, &nsa, &osa)) |
242 | if (sigaction (SIGUSR2, &nsa, &osa)) |
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243 | { |
132 | perror ("sigaction"); |
244 | perror ("sigaction"); |
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245 | abort (); |
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246 | } |
133 | |
247 | |
134 | /* set the new stack */ |
248 | /* set the new stack */ |
135 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
249 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
136 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
250 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
137 | nstk.ss_flags = 0; |
251 | nstk.ss_flags = 0; |
138 | |
252 | |
139 | if (sigaltstack (&nstk, &ostk) < 0) |
253 | if (sigaltstack (&nstk, &ostk) < 0) |
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254 | { |
140 | perror ("sigaltstack"); |
255 | perror ("sigaltstack"); |
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256 | abort (); |
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257 | } |
141 | |
258 | |
142 | trampoline_count = 0; |
259 | trampoline_count = 0; |
143 | kill (getpid (), SIGUSR2); |
260 | kill (getpid (), SIGUSR2); |
144 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
261 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
145 | |
262 | |
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156 | abort (); |
273 | abort (); |
157 | |
274 | |
158 | if (~ostk.ss_flags & SS_DISABLE) |
275 | if (~ostk.ss_flags & SS_DISABLE) |
159 | sigaltstack (&ostk, 0); |
276 | sigaltstack (&ostk, 0); |
160 | |
277 | |
161 | sigaction (SIGUSR1, &osa, 0); |
278 | sigaction (SIGUSR2, &osa, 0); |
162 | |
279 | |
163 | sigprocmask (SIG_SETMASK, &osig, 0); |
280 | sigprocmask (SIG_SETMASK, &osig, 0); |
164 | |
281 | |
165 | # elif CORO_LOOSE |
282 | # elif CORO_LOSER |
166 | |
283 | |
167 | setjmp (ctx->env); |
284 | setjmp (ctx->env); |
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285 | #if __CYGWIN__ |
168 | ctx->env[7] = (long)((char *)sptr + ssize); |
286 | ctx->env[7] = (long)((char *)sptr + ssize); |
169 | ctx->env[8] = (long)coro_init; |
287 | ctx->env[8] = (long)coro_init; |
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288 | #elif defined(_M_IX86) |
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289 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
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290 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize); |
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291 | #elif defined(_M_AMD64) |
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292 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
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293 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
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294 | #elif defined(_M_IA64) |
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295 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
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296 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
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297 | #else |
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298 | # error "microsoft libc or architecture not supported" |
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299 | #endif |
170 | |
300 | |
171 | # elif CORO_LINUX |
301 | # elif CORO_LINUX |
172 | |
302 | |
173 | setjmp (ctx->env); |
303 | _setjmp (ctx->env); |
174 | #if defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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175 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(JB_PC) && defined(JB_SP) |
304 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
176 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
305 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
177 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr,ssize); |
306 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
178 | #elif defined(__GLIBC__) && defined(__GLIBC_MINOR__) \ |
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179 | && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined(__mc68000__) |
307 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
180 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
308 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
181 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
309 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
182 | #elif defined(__GNU_LIBRARY__) && defined(__i386__) |
310 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
183 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
311 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
184 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
312 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
185 | #elif defined(__GNU_LIBRARY__) && defined(__amd64__) |
313 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
186 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
314 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
187 | ctx->env[0].__jmpbuf[JB_RSP] = (long)((char *)sptr + ssize); |
315 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
188 | #else |
316 | #else |
189 | #error "linux libc or architecture not supported" |
317 | # error "linux libc or architecture not supported" |
190 | #endif |
318 | #endif |
191 | |
319 | |
192 | # elif CORO_IRIX |
320 | # elif CORO_IRIX |
193 | |
321 | |
194 | setjmp (ctx->env); |
322 | setjmp (ctx->env); |
195 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
323 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
196 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr,ssize); |
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 | /* we try to allow for both functions with and without frame pointers */ |
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330 | *--ctx->sp = (void *)coro_init; |
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331 | { |
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332 | void *frame = ctx->sp - 1; |
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333 | int i; |
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334 | for (i = NUM_SAVED; i--; ) |
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335 | *--ctx->sp = frame; |
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336 | } |
197 | |
337 | |
198 | # endif |
338 | # endif |
199 | |
339 | |
200 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
340 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
201 | |
341 | |
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342 | # elif CORO_PTHREAD |
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343 | |
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344 | pthread_t id; |
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345 | pthread_attr_t attr; |
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346 | coro_context nctx; |
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347 | struct coro_init_args args; |
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348 | static int once; |
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349 | |
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350 | if (!once) |
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351 | { |
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352 | pthread_mutex_lock (&coro_mutex); |
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353 | once = 1; |
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354 | } |
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355 | |
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356 | args.func = coro; |
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357 | args.arg = arg; |
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358 | args.self = ctx; |
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359 | args.main = &nctx; |
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360 | |
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361 | pthread_attr_init (&attr); |
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362 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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363 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
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364 | pthread_create (&id, &attr, trampoline, &args); |
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365 | |
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366 | pthread_cond_init (&args.self->c, 0); |
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367 | coro_transfer (args.main, args.self); |
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368 | |
202 | #else |
369 | #else |
203 | error unsupported architecture |
370 | # error unsupported backend |
204 | #endif |
371 | #endif |
205 | } |
372 | } |
206 | |
373 | |