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, |
… | |
… | |
64 | * coro_create now allows one to create source coro_contexts. |
64 | * coro_create now allows one to create source coro_contexts. |
65 | * do not rely on makecontext passing a void * correctly. |
65 | * do not rely on makecontext passing a void * correctly. |
66 | * try harder to get _setjmp/_longjmp. |
66 | * try harder to get _setjmp/_longjmp. |
67 | * major code cleanup/restructuring. |
67 | * major code cleanup/restructuring. |
68 | * 2008-11-10 the .cfi hacks are no longer needed. |
68 | * 2008-11-10 the .cfi hacks are no longer needed. |
|
|
69 | * 2008-11-16 work around a freebsd pthread bug. |
|
|
70 | * 2008-11-19 define coro_*jmp symbols for easier porting. |
|
|
71 | * 2009-06-23 tentative win32-backend support for mingw32 (Yasuhiro Matsumoto). |
69 | */ |
72 | */ |
70 | |
73 | |
71 | #ifndef CORO_H |
74 | #ifndef CORO_H |
72 | #define CORO_H |
75 | #define CORO_H |
73 | |
76 | |
… | |
… | |
115 | * SGI's version of Microsoft's NT ;) |
118 | * SGI's version of Microsoft's NT ;) |
116 | * |
119 | * |
117 | * -DCORO_ASM |
120 | * -DCORO_ASM |
118 | * |
121 | * |
119 | * Handcoded assembly, known to work only on a few architectures/ABI: |
122 | * Handcoded assembly, known to work only on a few architectures/ABI: |
120 | * ELF Linux x86 && amd64 when gcc is used and optimisation is turned on. |
123 | * GCC + x86/IA32 and amd64/x86_64 + GNU/Linux and a few BSDs. |
121 | * |
124 | * |
122 | * -DCORO_PTHREAD |
125 | * -DCORO_PTHREAD |
123 | * |
126 | * |
124 | * Use the pthread API. You have to provide <pthread.h> and -lpthread. |
127 | * Use the pthread API. You have to provide <pthread.h> and -lpthread. |
|
|
128 | * This is likely the slowest backend, and it also does not support fork(), |
|
|
129 | * so avoid it at all costs. |
125 | * |
130 | * |
126 | * If you define neither of these symbols, coro.h will try to autodetect |
131 | * If you define neither of these symbols, coro.h will try to autodetect |
127 | * the model. This currently works for CORO_LOSER only. For the other |
132 | * the model. This currently works for CORO_LOSER only. For the other |
128 | * alternatives you should check (e.g. using autoconf) and define the |
133 | * alternatives you should check (e.g. using autoconf) and define the |
129 | * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. |
134 | * following symbols: HAVE_UCONTEXT_H / HAVE_SETJMP_H / HAVE_SIGALTSTACK. |
… | |
… | |
236 | # define _XOPEN_UNIX 1 |
241 | # define _XOPEN_UNIX 1 |
237 | # endif |
242 | # endif |
238 | |
243 | |
239 | # include <setjmp.h> |
244 | # include <setjmp.h> |
240 | |
245 | |
241 | struct coro_context { |
246 | # if _XOPEN_UNIX > 0 || defined (_setjmp) |
242 | #if _XOPEN_UNIX > 0 || CORO_LOSER |
247 | # define coro_jmp_buf jmp_buf |
243 | jmp_buf env; |
248 | # define coro_setjmp(env) _setjmp (env) |
244 | #else |
249 | # define coro_longjmp(env) _longjmp ((env), 1) |
245 | sigjmp_buf env; |
|
|
246 | #endif |
|
|
247 | }; |
|
|
248 | |
|
|
249 | # if _XOPEN_UNIX > 0 |
|
|
250 | # define coro_transfer(p,n) do { if (! _setjmp ((p)->env )) _longjmp ((n)->env, 1); } while (0) |
|
|
251 | # elif CORO_LOSER |
250 | # elif CORO_LOSER |
252 | # define coro_transfer(p,n) do { if (! setjmp ((p)->env )) longjmp ((n)->env, 1); } while (0) |
251 | # define coro_jmp_buf jmp_buf |
|
|
252 | # define coro_setjmp(env) setjmp (env) |
|
|
253 | # define coro_longjmp(env) longjmp ((env), 1) |
253 | # else |
254 | # else |
|
|
255 | # define coro_jmp_buf sigjmp_buf |
|
|
256 | # define coro_setjmp(env) sigsetjmp (env, 0) |
|
|
257 | # define coro_longjmp(env) siglongjmp ((env), 1) |
|
|
258 | # endif |
|
|
259 | |
|
|
260 | struct coro_context { |
|
|
261 | coro_jmp_buf env; |
|
|
262 | }; |
|
|
263 | |
254 | # define coro_transfer(p,n) do { if (!sigsetjmp ((p)->env, 0)) siglongjmp ((n)->env, 1); } while (0) |
264 | # define coro_transfer(p,n) do { if (!coro_setjmp ((p)->env)) coro_longjmp ((n)->env); } while (0) |
255 | # endif |
|
|
256 | |
|
|
257 | # define coro_destroy(ctx) (void *)(ctx) |
265 | # define coro_destroy(ctx) (void *)(ctx) |
258 | |
266 | |
259 | #elif CORO_ASM |
267 | #elif CORO_ASM |
260 | |
268 | |
261 | struct coro_context { |
269 | struct coro_context { |