1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2008 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2001-2012,2015 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, |
… | |
… | |
60 | * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP. |
60 | * 2008-11-05 Hopefully fix misaligned stacks with CORO_ASM/SETJMP. |
61 | * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64. |
61 | * 2008-11-07 rbp wasn't saved in CORO_ASM on x86_64. |
62 | * introduce coro_destroy, which is a nop except for pthreads. |
62 | * introduce coro_destroy, which is a nop except for pthreads. |
63 | * speed up CORO_PTHREAD. Do no longer leak threads either. |
63 | * speed up CORO_PTHREAD. Do no longer leak threads either. |
64 | * coro_create now allows one to create source coro_contexts. |
64 | * coro_create now allows one to create source coro_contexts. |
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65 | * do not rely on makecontext passing a void * correctly. |
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66 | * try harder to get _setjmp/_longjmp. |
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67 | * major code cleanup/restructuring. |
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68 | * 2008-11-10 the .cfi hacks are no longer needed. |
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69 | * 2008-11-16 work around a freebsd pthread bug. |
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70 | * 2008-11-19 define coro_*jmp symbols for easier porting. |
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71 | * 2009-06-23 tentative win32-backend support for mingw32 (Yasuhiro Matsumoto). |
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72 | * 2010-12-03 tentative support for uclibc (which lacks all sorts of things). |
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73 | * 2011-05-30 set initial callee-saved-registers to zero with CORO_ASM. |
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74 | * use .cfi_undefined rip on linux-amd64 for better backtraces. |
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75 | * 2011-06-08 maybe properly implement weird windows amd64 calling conventions. |
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76 | * 2011-07-03 rely on __GCC_HAVE_DWARF2_CFI_ASM for cfi detection. |
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77 | * 2011-08-08 cygwin trashes stacks, use pthreads with double stack on cygwin. |
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78 | * 2012-12-04 reduce misprediction penalty for x86/amd64 assembly switcher. |
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79 | * 2012-12-05 experimental fiber backend (allocates stack twice). |
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80 | * 2012-12-07 API version 3 - add coro_stack_alloc/coro_stack_free. |
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81 | * 2012-12-21 valgrind stack registering was broken. |
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82 | * 2015-12-05 experimental asm be for arm7, based on a patch by Nick Zavaritsky. |
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83 | * use __name__ for predefined symbols, as in libecb. |
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84 | * enable guard pages on arm, aarch64 and mips. |
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85 | * 2016-08-27 try to disable _FORTIFY_SOURCE with CORO_SJLJ, as it |
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86 | * breaks setjmp/longjmp. Also disable CORO_ASM for asm by default, |
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87 | * as it was reported to crash. |
65 | */ |
88 | */ |
66 | |
89 | |
67 | #ifndef CORO_H |
90 | #ifndef CORO_H |
68 | #define CORO_H |
91 | #define CORO_H |
69 | |
92 | |
70 | #define CORO_VERSION 2 |
93 | #if __cplusplus |
71 | |
94 | extern "C" { |
72 | /* |
95 | #endif |
73 | * Changes since API version 1: |
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74 | * replaced bogus -DCORO_LOOSE with gramatically more correct -DCORO_LOSER |
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75 | */ |
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76 | |
96 | |
77 | /* |
97 | /* |
78 | * This library consists of only three files |
98 | * This library consists of only three files |
79 | * coro.h, coro.c and LICENSE (and optionally README) |
99 | * coro.h, coro.c and LICENSE (and optionally README) |
80 | * |
100 | * |
81 | * It implements what is known as coroutines, in a hopefully |
101 | * It implements what is known as coroutines, in a hopefully |
82 | * portable way. At the moment you have to define which kind |
102 | * portable way. |
83 | * of implementation flavour you want: |
103 | * |
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104 | * All compiletime symbols must be defined both when including coro.h |
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105 | * (using libcoro) as well as when compiling coro.c (the implementation). |
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106 | * |
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107 | * You can manually specify which flavour you want. If you don't define |
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108 | * any of these, libcoro tries to choose a safe and fast default: |
84 | * |
109 | * |
85 | * -DCORO_UCONTEXT |
110 | * -DCORO_UCONTEXT |
86 | * |
111 | * |
87 | * This flavour uses SUSv2's get/set/swap/makecontext functions that |
112 | * This flavour uses SUSv2's get/set/swap/makecontext functions that |
88 | * unfortunately only newer unices support. |
113 | * unfortunately only some unices support, and is quite slow. |
89 | * |
114 | * |
90 | * -DCORO_SJLJ |
115 | * -DCORO_SJLJ |
91 | * |
116 | * |
92 | * This flavour uses SUSv2's setjmp/longjmp and sigaltstack functions to |
117 | * This flavour uses SUSv2's setjmp/longjmp and sigaltstack functions to |
93 | * do it's job. Coroutine creation is much slower than UCONTEXT, but |
118 | * do it's job. Coroutine creation is much slower than UCONTEXT, but |
94 | * context switching is often a bit cheaper. It should work on almost |
119 | * context switching is a bit cheaper. It should work on almost all unices. |
95 | * all unices. |
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96 | * |
120 | * |
97 | * -DCORO_LINUX |
121 | * -DCORO_LINUX |
98 | * |
122 | * |
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123 | * CORO_SJLJ variant. |
99 | * Old GNU/Linux systems (<= glibc-2.1) only work with this implementation |
124 | * Old GNU/Linux systems (<= glibc-2.1) only work with this implementation |
100 | * (it is very fast and therefore recommended over other methods, but |
125 | * (it is very fast and therefore recommended over other methods, but |
101 | * doesn't work with anything newer). |
126 | * doesn't work with anything newer). |
102 | * |
127 | * |
103 | * -DCORO_LOSER |
128 | * -DCORO_LOSER |
104 | * |
129 | * |
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130 | * CORO_SJLJ variant. |
105 | * Microsoft's highly proprietary platform doesn't support sigaltstack, and |
131 | * Microsoft's highly proprietary platform doesn't support sigaltstack, and |
106 | * this automatically selects a suitable workaround for this platform. |
132 | * this selects a suitable workaround for this platform. It might not work |
107 | * (untested) |
133 | * with your compiler though - it has only been tested with MSVC 6. |
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134 | * |
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135 | * -DCORO_FIBER |
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136 | * |
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137 | * Slower, but probably more portable variant for the Microsoft operating |
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138 | * system, using fibers. Ignores the passed stack and allocates it internally. |
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139 | * Also, due to bugs in cygwin, this does not work with cygwin. |
108 | * |
140 | * |
109 | * -DCORO_IRIX |
141 | * -DCORO_IRIX |
110 | * |
142 | * |
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143 | * CORO_SJLJ variant. |
111 | * SGI's version of Microsoft's NT ;) |
144 | * For SGI's version of Microsoft's NT ;) |
112 | * |
145 | * |
113 | * -DCORO_ASM |
146 | * -DCORO_ASM |
114 | * |
147 | * |
115 | * Handcoded assembly, known to work only on a few architectures/ABI: |
148 | * Hand coded assembly, known to work only on a few architectures/ABI: |
116 | * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on. |
149 | * GCC + arm7/x86/IA32/amd64/x86_64 + GNU/Linux and a few BSDs. Fastest |
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150 | * choice, if it works. |
117 | * |
151 | * |
118 | * -DCORO_PTHREAD |
152 | * -DCORO_PTHREAD |
119 | * |
153 | * |
120 | * Use the pthread API. You have to provide <pthread.h> and -lpthread. |
154 | * Use the pthread API. You have to provide <pthread.h> and -lpthread. |
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155 | * This is likely the slowest backend, and it also does not support fork(), |
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156 | * so avoid it at all costs. |
121 | * |
157 | * |
122 | * If you define neither of these symbols, coro.h will try to autodetect |
158 | * If you define neither of these symbols, coro.h will try to autodetect |
123 | * the model. This currently works for CORO_LOSER only. For the other |
159 | * the best/safest model. To help with the autodetection, you should check |
124 | * alternatives you should check (e.g. using autoconf) and define the |
160 | * (e.g. using autoconf) and define the following symbols: HAVE_UCONTEXT_H |
125 | * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. |
161 | * / HAVE_SETJMP_H / HAVE_SIGALTSTACK. |
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162 | */ |
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163 | |
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164 | /* |
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165 | * Changes when the API changes incompatibly. |
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166 | * This is ONLY the API version - there is no ABI compatibility between releases. |
126 | */ |
167 | * |
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168 | * Changes in API version 2: |
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169 | * replaced bogus -DCORO_LOOSE with grammatically more correct -DCORO_LOSER |
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170 | * Changes in API version 3: |
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171 | * introduced stack management (CORO_STACKALLOC) |
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172 | */ |
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173 | #define CORO_VERSION 3 |
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174 | |
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175 | #include <stddef.h> |
127 | |
176 | |
128 | /* |
177 | /* |
129 | * This is the type for the initialization function of a new coroutine. |
178 | * This is the type for the initialization function of a new coroutine. |
130 | */ |
179 | */ |
131 | typedef void (*coro_func)(void *); |
180 | typedef void (*coro_func)(void *); |
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142 | * uninitialised coro_context, it expects a pointer to the entry function |
191 | * uninitialised coro_context, it expects a pointer to the entry function |
143 | * and the single pointer value that is given to it as argument. |
192 | * and the single pointer value that is given to it as argument. |
144 | * |
193 | * |
145 | * Allocating/deallocating the stack is your own responsibility. |
194 | * Allocating/deallocating the stack is your own responsibility. |
146 | * |
195 | * |
147 | * As a special case, if coro, arg, sptr and ssize are all zero, |
196 | * As a special case, if coro, arg, sptr and ssze are all zero, |
148 | * then an "empty" coro_contetx will be created that is suitable |
197 | * then an "empty" coro_context will be created that is suitable |
149 | * as an initial source for coro_transfer. |
198 | * as an initial source for coro_transfer. |
150 | * |
199 | * |
151 | * This function is not reentrant, but putting a mutex around it |
200 | * This function is not reentrant, but putting a mutex around it |
152 | * will work. |
201 | * will work. |
153 | */ |
202 | */ |
154 | void coro_create (coro_context *ctx, /* an uninitialised coro_context */ |
203 | void coro_create (coro_context *ctx, /* an uninitialised coro_context */ |
155 | coro_func coro, /* the coroutine code to be executed */ |
204 | coro_func coro, /* the coroutine code to be executed */ |
156 | void *arg, /* a single pointer passed to the coro */ |
205 | void *arg, /* a single pointer passed to the coro */ |
157 | void *sptr, /* start of stack area */ |
206 | void *sptr, /* start of stack area */ |
158 | long ssize); /* size of stack area */ |
207 | size_t ssze); /* size of stack area in bytes */ |
159 | |
208 | |
160 | /* |
209 | /* |
161 | * The following prototype defines the coroutine switching function. It is |
210 | * The following prototype defines the coroutine switching function. It is |
162 | * usually implemented as a macro, so watch out. |
211 | * sometimes implemented as a macro, so watch out. |
163 | * |
212 | * |
164 | * This function is thread-safe and reentrant. |
213 | * This function is thread-safe and reentrant. |
165 | */ |
214 | */ |
166 | #if 0 |
215 | #if 0 |
167 | void coro_transfer (coro_context *prev, coro_context *next); |
216 | void coro_transfer (coro_context *prev, coro_context *next); |
168 | #endif |
217 | #endif |
169 | |
218 | |
170 | /* |
219 | /* |
171 | * The following prototype defines the coroutine destroy function. It is |
220 | * The following prototype defines the coroutine destroy function. It |
172 | * usually implemented as a macro, so watch out. It also serves |
221 | * is sometimes implemented as a macro, so watch out. It also serves no |
173 | * no purpose unless you want to use the CORO_PTHREAD backend. |
222 | * purpose unless you want to use the CORO_PTHREAD backend, where it is |
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223 | * used to clean up the thread. You are responsible for freeing the stack |
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224 | * and the context itself. |
174 | * |
225 | * |
175 | * This function is thread-safe and reentrant. |
226 | * This function is thread-safe and reentrant. |
176 | */ |
227 | */ |
177 | #if 0 |
228 | #if 0 |
178 | void coro_destroy (coro_context *ctx); |
229 | void coro_destroy (coro_context *ctx); |
179 | #endif |
230 | #endif |
180 | |
231 | |
181 | /* |
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182 | * That was it. No other user-visible functions are implemented here. |
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183 | */ |
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184 | |
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185 | /*****************************************************************************/ |
232 | /*****************************************************************************/ |
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233 | /* optional stack management */ |
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234 | /*****************************************************************************/ |
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235 | /* |
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236 | * You can disable all of the stack management functions by |
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237 | * defining CORO_STACKALLOC to 0. Otherwise, they are enabled by default. |
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238 | * |
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239 | * If stack management is enabled, you can influence the implementation via these |
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240 | * symbols: |
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241 | * |
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242 | * -DCORO_USE_VALGRIND |
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243 | * |
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244 | * If defined, then libcoro will include valgrind/valgrind.h and register |
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245 | * and unregister stacks with valgrind. |
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246 | * |
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247 | * -DCORO_GUARDPAGES=n |
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248 | * |
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249 | * libcoro will try to use the specified number of guard pages to protect against |
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250 | * stack overflow. If n is 0, then the feature will be disabled. If it isn't |
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251 | * defined, then libcoro will choose a suitable default. If guardpages are not |
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252 | * supported on the platform, then the feature will be silently disabled. |
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253 | */ |
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254 | #ifndef CORO_STACKALLOC |
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255 | # define CORO_STACKALLOC 1 |
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256 | #endif |
186 | |
257 | |
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258 | #if CORO_STACKALLOC |
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259 | |
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260 | /* |
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261 | * The only allowed operations on these struct members is to read the |
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262 | * "sptr" and "ssze" members to pass it to coro_create, to read the "sptr" |
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263 | * member to see if it is false, in which case the stack isn't allocated, |
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264 | * and to set the "sptr" member to 0, to indicate to coro_stack_free to |
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265 | * not actually do anything. |
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266 | */ |
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267 | |
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268 | struct coro_stack |
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269 | { |
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270 | void *sptr; |
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271 | size_t ssze; |
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272 | #if CORO_USE_VALGRIND |
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273 | int valgrind_id; |
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274 | #endif |
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275 | }; |
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276 | |
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277 | /* |
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278 | * Try to allocate a stack of at least the given size and return true if |
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279 | * successful, or false otherwise. |
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280 | * |
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281 | * The size is *NOT* specified in bytes, but in units of sizeof (void *), |
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282 | * i.e. the stack is typically 4(8) times larger on 32 bit(64 bit) platforms |
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283 | * then the size passed in. |
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284 | * |
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285 | * If size is 0, then a "suitable" stack size is chosen (usually 1-2MB). |
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286 | */ |
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287 | int coro_stack_alloc (struct coro_stack *stack, unsigned int size); |
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288 | |
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289 | /* |
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290 | * Free the stack allocated by coro_stack_alloc again. It is safe to |
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291 | * call this function on the coro_stack structure even if coro_stack_alloc |
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292 | * failed. |
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293 | */ |
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294 | void coro_stack_free (struct coro_stack *stack); |
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295 | |
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296 | #endif |
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297 | |
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298 | /* |
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299 | * That was it. No other user-serviceable parts below here. |
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300 | */ |
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301 | |
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302 | /*****************************************************************************/ |
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303 | |
187 | #if !defined(CORO_LOSER) && !defined(CORO_UCONTEXT) \ |
304 | #if !defined CORO_LOSER && !defined CORO_UCONTEXT \ |
188 | && !defined(CORO_SJLJ) && !defined(CORO_LINUX) \ |
305 | && !defined CORO_SJLJ && !defined CORO_LINUX \ |
189 | && !defined(CORO_IRIX) && !defined(CORO_ASM) \ |
306 | && !defined CORO_IRIX && !defined CORO_ASM \ |
190 | && !defined(CORO_PTHREAD) |
307 | && !defined CORO_PTHREAD && !defined CORO_FIBER |
191 | # if defined(WINDOWS) |
308 | # if defined WINDOWS && (defined __i386__ || (__x86_64__ || defined _M_IX86 || defined _M_AMD64) |
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309 | # define CORO_ASM 1 |
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310 | # elif defined WINDOWS || defined _WIN32 |
192 | # define CORO_LOSER 1 /* you don't win with windoze */ |
311 | # define CORO_LOSER 1 /* you don't win with windoze */ |
193 | # elif defined(__linux) && (defined(__x86) || defined (__amd64)) |
312 | # elif __linux && (__i386__ || (__x86_64__ && !__ILP32__) /*|| (__arm__ && __ARM_ARCH == 7)), not working */ |
194 | # define CORO_ASM 1 |
313 | # define CORO_ASM 1 |
195 | # elif defined(HAVE_UCONTEXT_H) |
314 | # elif defined HAVE_UCONTEXT_H |
196 | # define CORO_UCONTEXT 1 |
315 | # define CORO_UCONTEXT 1 |
197 | # elif defined(HAVE_SETJMP_H) && defined(HAVE_SIGALTSTACK) |
316 | # elif defined HAVE_SETJMP_H && defined HAVE_SIGALTSTACK |
198 | # define CORO_SJLJ 1 |
317 | # define CORO_SJLJ 1 |
199 | # else |
318 | # else |
200 | error unknown or unsupported architecture |
319 | error unknown or unsupported architecture |
201 | # endif |
320 | # endif |
202 | #endif |
321 | #endif |
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205 | |
324 | |
206 | #if CORO_UCONTEXT |
325 | #if CORO_UCONTEXT |
207 | |
326 | |
208 | # include <ucontext.h> |
327 | # include <ucontext.h> |
209 | |
328 | |
210 | struct coro_context { |
329 | struct coro_context |
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330 | { |
211 | ucontext_t uc; |
331 | ucontext_t uc; |
212 | }; |
332 | }; |
213 | |
333 | |
214 | # define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
334 | # define coro_transfer(p,n) swapcontext (&((p)->uc), &((n)->uc)) |
215 | # define coro_destroy(ctx) (void *)(ctx) |
335 | # define coro_destroy(ctx) (void *)(ctx) |
216 | |
336 | |
217 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
337 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX |
218 | |
338 | |
219 | # if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
339 | # if defined(CORO_LINUX) && !defined(_GNU_SOURCE) |
220 | # define _GNU_SOURCE /* for linux libc */ |
340 | # define _GNU_SOURCE /* for glibc */ |
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341 | # endif |
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342 | |
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343 | /* try to disable well-meant but buggy checks in some libcs */ |
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344 | # ifdef _FORTIFY_SOURCE |
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345 | # undef _FORTIFY_SOURCE |
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346 | # undef __USE_FORTIFY_LEVEL /* helps some more when too much has been included already */ |
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347 | # endif |
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348 | |
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349 | # if !CORO_LOSER |
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350 | # include <unistd.h> |
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351 | # endif |
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352 | |
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353 | /* solaris is hopelessly borked, it expands _XOPEN_UNIX to nothing */ |
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354 | # if __sun |
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355 | # undef _XOPEN_UNIX |
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356 | # define _XOPEN_UNIX 1 |
221 | # endif |
357 | # endif |
222 | |
358 | |
223 | # include <setjmp.h> |
359 | # include <setjmp.h> |
224 | |
360 | |
225 | struct coro_context { |
361 | # if _XOPEN_UNIX > 0 || defined (_setjmp) |
226 | jmp_buf env; |
362 | # define coro_jmp_buf jmp_buf |
227 | }; |
363 | # define coro_setjmp(env) _setjmp (env) |
228 | |
364 | # define coro_longjmp(env) _longjmp ((env), 1) |
229 | # if CORO_LINUX || (_XOPEN_SOURCE >= 600) |
365 | # elif CORO_LOSER |
230 | # define coro_transfer(p,n) do { if (!_setjmp ((p)->env)) _longjmp ((n)->env, 1); } while (0) |
366 | # define coro_jmp_buf jmp_buf |
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367 | # define coro_setjmp(env) setjmp (env) |
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368 | # define coro_longjmp(env) longjmp ((env), 1) |
231 | # else |
369 | # else |
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370 | # define coro_jmp_buf sigjmp_buf |
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371 | # define coro_setjmp(env) sigsetjmp (env, 0) |
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372 | # define coro_longjmp(env) siglongjmp ((env), 1) |
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373 | # endif |
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374 | |
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375 | struct coro_context |
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376 | { |
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377 | coro_jmp_buf env; |
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378 | }; |
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379 | |
232 | # define coro_transfer(p,n) do { if (!setjmp ((p)->env)) longjmp ((n)->env, 1); } while (0) |
380 | # define coro_transfer(p,n) do { if (!coro_setjmp ((p)->env)) coro_longjmp ((n)->env); } while (0) |
233 | # endif |
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234 | |
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235 | # define coro_destroy(ctx) (void *)(ctx) |
381 | # define coro_destroy(ctx) (void *)(ctx) |
236 | |
382 | |
237 | #elif CORO_ASM |
383 | #elif CORO_ASM |
238 | |
384 | |
239 | struct coro_context { |
385 | struct coro_context |
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386 | { |
240 | volatile void **sp; /* must be at offset 0 */ |
387 | void **sp; /* must be at offset 0 */ |
241 | }; |
388 | }; |
242 | |
389 | |
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390 | #if __i386__ || __x86_64__ |
243 | void __attribute__ ((__noinline__, __regparm__(2))) |
391 | void __attribute__ ((__noinline__, __regparm__(2))) |
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392 | #else |
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393 | void __attribute__ ((__noinline__)) |
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394 | #endif |
244 | coro_transfer (coro_context *prev, coro_context *next); |
395 | coro_transfer (coro_context *prev, coro_context *next); |
245 | |
396 | |
246 | # define coro_destroy(ctx) (void *)(ctx) |
397 | # define coro_destroy(ctx) (void *)(ctx) |
247 | |
398 | |
248 | #elif CORO_PTHREAD |
399 | #elif CORO_PTHREAD |
249 | |
400 | |
250 | # include <pthread.h> |
401 | # include <pthread.h> |
251 | |
402 | |
252 | extern pthread_mutex_t coro_mutex; |
403 | extern pthread_mutex_t coro_mutex; |
253 | |
404 | |
254 | struct coro_context { |
405 | struct coro_context |
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406 | { |
255 | pthread_cond_t cv; |
407 | pthread_cond_t cv; |
256 | pthread_t id; |
408 | pthread_t id; |
257 | }; |
409 | }; |
258 | |
410 | |
259 | void coro_transfer (coro_context *prev, coro_context *next); |
411 | void coro_transfer (coro_context *prev, coro_context *next); |
260 | void coro_destroy (coro_context *ctx); |
412 | void coro_destroy (coro_context *ctx); |
261 | |
413 | |
262 | #endif |
414 | #elif CORO_FIBER |
263 | |
415 | |
264 | #endif |
416 | struct coro_context |
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417 | { |
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418 | void *fiber; |
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419 | /* only used for initialisation */ |
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420 | coro_func coro; |
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421 | void *arg; |
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422 | }; |
265 | |
423 | |
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424 | void coro_transfer (coro_context *prev, coro_context *next); |
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425 | void coro_destroy (coro_context *ctx); |
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426 | |
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427 | #endif |
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428 | |
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429 | #if __cplusplus |
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430 | } |
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431 | #endif |
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432 | |
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433 | #endif |
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434 | |