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/cvs/libcoro/coro.c
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Comparing libcoro/coro.c (file contents):
Revision 1.40 by root, Sat Nov 8 04:52:01 2008 UTC vs.
Revision 1.50 by root, Fri Apr 2 19:13:54 2010 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,
… …
78 78
79static coro_func coro_init_func; 79static coro_func coro_init_func;
80static void *coro_init_arg; 80static void *coro_init_arg;
81static coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
82 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
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;
… …
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 sigsetjmp (new_coro->env, 0)
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
… …
142 "\tpush %rbx\n" 123 "\tpush %rbx\n"
143 "\tpush %r12\n" 124 "\tpush %r12\n"
144 "\tpush %r13\n" 125 "\tpush %r13\n"
145 "\tpush %r14\n" 126 "\tpush %r14\n"
146 "\tpush %r15\n" 127 "\tpush %r15\n"
128 #if CORO_WIN_TIB
129 "\tpush %fs:0xc\n"
130 "\tpush %fs:0x8\n"
131 "\tpush %fs:0x0\n"
132 #endif
147 "\tmov %rsp, (%rdi)\n" 133 "\tmov %rsp, (%rdi)\n"
148 "\tmov (%rsi), %rsp\n" 134 "\tmov (%rsi), %rsp\n"
135 #if CORO_WIN_TIB
136 "\tpop %fs:0x0\n"
137 "\tpop %fs:0x8\n"
138 "\tpop %fs:0xc\n"
139 #endif
149 "\tpop %r15\n" 140 "\tpop %r15\n"
150 "\tpop %r14\n" 141 "\tpop %r14\n"
151 "\tpop %r13\n" 142 "\tpop %r13\n"
152 "\tpop %r12\n" 143 "\tpop %r12\n"
153 "\tpop %rbx\n" 144 "\tpop %rbx\n"
… …
156 #define NUM_SAVED 4 147 #define NUM_SAVED 4
157 "\tpush %ebp\n" 148 "\tpush %ebp\n"
158 "\tpush %ebx\n" 149 "\tpush %ebx\n"
159 "\tpush %esi\n" 150 "\tpush %esi\n"
160 "\tpush %edi\n" 151 "\tpush %edi\n"
152 #if CORO_WIN_TIB
153 "\tpush %fs:8\n"
154 "\tpush %fs:4\n"
155 "\tpush %fs:0\n"
156 #endif
161 "\tmov %esp, (%eax)\n" 157 "\tmov %esp, (%eax)\n"
162 "\tmov (%edx), %esp\n" 158 "\tmov (%edx), %esp\n"
159 #if CORO_WIN_TIB
160 "\tpop %fs:0\n"
161 "\tpop %fs:4\n"
162 "\tpop %fs:8\n"
163 #endif
163 "\tpop %edi\n" 164 "\tpop %edi\n"
164 "\tpop %esi\n" 165 "\tpop %esi\n"
165 "\tpop %ebx\n" 166 "\tpop %ebx\n"
166 "\tpop %ebp\n" 167 "\tpop %ebp\n"
167 #else 168 #else
… …
241 sigaction (SIGUSR2, &osa, 0); 242 sigaction (SIGUSR2, &osa, 0);
242 sigprocmask (SIG_SETMASK, &osig, 0); 243 sigprocmask (SIG_SETMASK, &osig, 0);
243 244
244# elif CORO_LOSER 245# elif CORO_LOSER
245 246
246 setjmp (ctx->env); 247 coro_setjmp (ctx->env);
247 #if __CYGWIN__ 248 #if __CYGWIN__ && __i386
249 ctx->env[8] = (long) coro_init;
248 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 250 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
249 ctx->env[8] = (long)coro_init; 251 #elif __CYGWIN__ && __x86_64
252 ctx->env[7] = (long) coro_init;
253 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
254 #elif defined(__MINGW32__)
255 ctx->env[5] = (long) coro_init;
256 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
250 #elif defined(_M_IX86) 257 #elif defined(_M_IX86)
251 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 258 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
252 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 259 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif defined(_M_AMD64) 260 #elif defined(_M_AMD64)
254 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 261 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
255 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 262 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
256 #elif defined(_M_IA64) 263 #elif defined(_M_IA64)
257 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 264 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
258 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 265 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
259 #else 266 #else
260 #error "microsoft libc or architecture not supported" 267 #error "microsoft libc or architecture not supported"
261 #endif 268 #endif
262 269
263# elif CORO_LINUX 270# elif CORO_LINUX
264 271
265 _setjmp (ctx->env); 272 coro_setjmp (ctx->env);
266 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 273 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
267 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 274 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
268 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 275 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
269 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 276 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
270 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 277 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
271 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 278 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
272 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 279 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
273 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 280 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
274 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 281 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
275 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 282 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
276 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 283 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
277 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 284 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
278 #else 285 #else
279 #error "linux libc or architecture not supported" 286 #error "linux libc or architecture not supported"
280 #endif 287 #endif
281 288
282# elif CORO_IRIX 289# elif CORO_IRIX
283 290
284 sigsetjmp (ctx->env, 0); 291 coro_setjmp (ctx->env, 0);
285 ctx->env[JB_PC] = (__uint64_t)coro_init; 292 ctx->env[JB_PC] = (__uint64_t)coro_init;
286 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 293 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
287 294
288# elif CORO_ASM 295# elif CORO_ASM
289 296
290 ctx->sp = (volatile void **)(ssize + (char *)sptr); 297 ctx->sp = (void **)(ssize + (char *)sptr);
291 *--ctx->sp = (void *)abort; /* needed for alignment only */ 298 *--ctx->sp = (void *)abort; /* needed for alignment only */
292 *--ctx->sp = (void *)coro_init; 299 *--ctx->sp = (void *)coro_init;
293 ctx->sp -= NUM_SAVED; 300 ctx->sp -= NUM_SAVED;
301
302 #if CORO_WIN_TIB
303 *--ctx->sp = sptr; /* StackLimit */
304 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
305 *--ctx->sp = 0; /* ExceptionList */
306 #endif
294 307
295# elif CORO_UCONTEXT 308# elif CORO_UCONTEXT
296 309
297 getcontext (&(ctx->uc)); 310 getcontext (&(ctx->uc));
298 311
… …
353void 366void
354coro_transfer (coro_context *prev, coro_context *next) 367coro_transfer (coro_context *prev, coro_context *next)
355{ 368{
356 pthread_cond_signal (&next->cv); 369 pthread_cond_signal (&next->cv);
357 pthread_cond_wait (&prev->cv, &coro_mutex); 370 pthread_cond_wait (&prev->cv, &coro_mutex);
371#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
372 pthread_testcancel ();
373#endif
358} 374}
359 375
360void 376void
361coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) 377coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
362{ 378{

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