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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.39 by root, Sat Nov 8 04:31:28 2008 UTC vs.
Revision 1.46 by root, Sat Jul 11 14:24:13 2009 UTC

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,
… …
74# include <stdio.h> 74# include <stdio.h>
75# include <signal.h> 75# include <signal.h>
76# include <unistd.h> 76# include <unistd.h>
77# endif 77# endif
78 78
79static volatile coro_func coro_init_func; 79static coro_func coro_init_func;
80static volatile void *coro_init_arg; 80static void *coro_init_arg;
81static volatile coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
82
83/* what we really want to detect here is wether we use a new-enough version of GAS */
84/* with dwarf debug info. instead, check for gcc 3, ELF and GNU/Linux and hope for the best */
85# if __GNUC__ >= 3 && __ELF__ && __linux__
86# define HAVE_CFI 1
87# endif
88 82
89static void 83static void
90coro_init (void) 84coro_init (void)
91{ 85{
92 volatile coro_func func = coro_init_func; 86 volatile coro_func func = coro_init_func;
93 volatile void *arg = coro_init_arg; 87 volatile void *arg = coro_init_arg;
94 88
95 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 89 coro_transfer (new_coro, create_coro);
96 90
97 func ((void *)arg); 91 func ((void *)arg);
98 92
99 /* the new coro returned. bad. just abort() for now */ 93 /* the new coro returned. bad. just abort() for now */
100 abort (); 94 abort ();
… …
106 100
107/* trampoline signal handler */ 101/* trampoline signal handler */
108static void 102static void
109trampoline (int sig) 103trampoline (int sig)
110{ 104{
111 if (
112 #if _XOPEN_UNIX > 0
113 _setjmp (new_coro->env) 105 if (coro_setjmp (new_coro->env))
114 #else
115 setjmp (new_coro->env)
116 #endif
117 ) {
118 #if HAVE_CFI
119 asm (".cfi_startproc");
120 #endif
121 coro_init (); /* start it */ 106 coro_init (); /* start it */
122 #if HAVE_CFI
123 asm (".cfi_endproc");
124 #endif
125 }
126 else 107 else
127 trampoline_done = 1; 108 trampoline_done = 1;
128} 109}
129 110
130# endif 111# endif
… …
241 sigaction (SIGUSR2, &osa, 0); 222 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 223 sigprocmask (SIG_SETMASK, &osig, 0);
243 224
244# elif CORO_LOSER 225# elif CORO_LOSER
245 226
246 setjmp (ctx->env); 227 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 228 #if __CYGWIN__
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 229 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 230 ctx->env[8] = (long)coro_init;
231 #elif defined(__MINGW32__)
232 ctx->env[4] = (long)((char *)sptr + ssize) - sizeof (long);
233 ctx->env[5] = (long)coro_init;
250 #elif defined(_M_IX86) 234 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 235 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 236 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 237 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 238 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
… …
260 #error "microsoft libc or architecture not supported" 244 #error "microsoft libc or architecture not supported"
261 #endif 245 #endif
262 246
263# elif CORO_LINUX 247# elif CORO_LINUX
264 248
265 _setjmp (ctx->env); 249 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 250 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 251 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 252 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 253 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 254 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
… …
279 #error "linux libc or architecture not supported" 263 #error "linux libc or architecture not supported"
280 #endif 264 #endif
281 265
282# elif CORO_IRIX 266# elif CORO_IRIX
283 267
284 setjmp (ctx->env); 268 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 269 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 270 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 271
288# elif CORO_ASM 272# elif CORO_ASM
289 273
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 274 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 275 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 276 *--ctx->sp = (void *)coro_init;
293 ctx->sp -= NUM_SAVED; 277 ctx->sp -= NUM_SAVED;
294 278
295# elif CORO_UCONTEXT 279# elif CORO_UCONTEXT
… …
306# endif 290# endif
307 291
308 coro_transfer (create_coro, new_coro); 292 coro_transfer (create_coro, new_coro);
309} 293}
310 294
311#endif
312
313/*****************************************************************************/ 295/*****************************************************************************/
314/* pthread backend */ 296/* pthread backend */
315/*****************************************************************************/ 297/*****************************************************************************/
316
317#if CORO_PTHREAD 298#elif CORO_PTHREAD
318 299
319/* this mutex will be locked by the running coroutine */ 300/* this mutex will be locked by the running coroutine */
320pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; 301pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
321 302
322struct coro_init_args 303struct coro_init_args
… …
356void 337void
357coro_transfer (coro_context *prev, coro_context *next) 338coro_transfer (coro_context *prev, coro_context *next)
358{ 339{
359 pthread_cond_signal (&next->cv); 340 pthread_cond_signal (&next->cv);
360 pthread_cond_wait (&prev->cv, &coro_mutex); 341 pthread_cond_wait (&prev->cv, &coro_mutex);
342#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
343 pthread_testcancel ();
344#endif
361} 345}
362 346
363void 347void
364coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 348coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
365{ 349{
… …
410 } 394 }
411 395
412 pthread_cond_destroy (&ctx->cv); 396 pthread_cond_destroy (&ctx->cv);
413} 397}
414 398
399#else
400# error unsupported backend
415#endif 401#endif
416 402

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