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Comparing libcoro/coro.c (file contents):
Revision 1.29 by root, Sun Mar 2 16:10:22 2008 UTC vs.
Revision 1.35 by root, Mon Nov 3 16:05:38 2008 UTC

… …
43#if !defined(STACK_ADJUST_PTR) 43#if !defined(STACK_ADJUST_PTR)
44/* IRIX is decidedly NON-unix */ 44/* IRIX is decidedly NON-unix */
45# if __sgi 45# if __sgi
46# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) 46# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
47# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) 47# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8)
48# elif __i386__ && CORO_LINUX 48# elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER)
49# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) 49# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss))
50# define STACK_ADJUST_SIZE(sp,ss) (ss) 50# define STACK_ADJUST_SIZE(sp,ss) (ss)
51# elif __amd64__ && CORO_LINUX 51# elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER)
52# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) 52# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
53# define STACK_ADJUST_SIZE(sp,ss) (ss) 53# define STACK_ADJUST_SIZE(sp,ss) (ss)
54# else 54# else
55# define STACK_ADJUST_PTR(sp,ss) (sp) 55# define STACK_ADJUST_PTR(sp,ss) (sp)
56# define STACK_ADJUST_SIZE(sp,ss) (ss) 56# define STACK_ADJUST_SIZE(sp,ss) (ss)
… …
120# endif 120# endif
121 121
122#endif 122#endif
123 123
124#if CORO_ASM 124#if CORO_ASM
125void __attribute__((__noinline__, __fastcall__)) 125asm (
126coro_transfer (struct coro_context *prev, struct coro_context *next) 126 ".text\n"
127{ 127 ".globl coro_transfer\n"
128 asm volatile ( 128 ".type coro_transfer, @function\n"
129 "coro_transfer:\n"
129#if __amd64 130#if __amd64
130# define NUM_CLOBBERED 5 131# define NUM_SAVED 5
131 "push %%rbx\n\t" 132 "\tpush %rbx\n"
132 "push %%r12\n\t" 133 "\tpush %r12\n"
133 "push %%r13\n\t" 134 "\tpush %r13\n"
134 "push %%r14\n\t" 135 "\tpush %r14\n"
135 "push %%r15\n\t" 136 "\tpush %r15\n"
136 "mov %%rsp, %0\n\t" 137 "\tmov %rsp, (%rdi)\n"
137 "mov %1, %%rsp\n\t" 138 "\tmov (%rsi), %rsp\n"
138 "pop %%r15\n\t" 139 "\tpop %r15\n"
139 "pop %%r14\n\t" 140 "\tpop %r14\n"
140 "pop %%r13\n\t" 141 "\tpop %r13\n"
141 "pop %%r12\n\t" 142 "\tpop %r12\n"
142 "pop %%rbx\n\t" 143 "\tpop %rbx\n"
143#elif __i386 144#elif __i386
144# define NUM_CLOBBERED 4 145# define NUM_SAVED 4
145 "push %%ebx\n\t" 146 "\tpush %ebx\n"
146 "push %%esi\n\t" 147 "\tpush %esi\n"
147 "push %%edi\n\t" 148 "\tpush %edi\n"
148 "push %%ebp\n\t" 149 "\tpush %ebp\n"
149 "mov %%esp, %0\n\t" 150 "\tmov %esp, (%eax)\n"
150 "mov %1, %%esp\n\t" 151 "\tmov (%edx), %esp\n"
151 "pop %%ebp\n\t" 152 "\tpop %ebp\n"
152 "pop %%edi\n\t" 153 "\tpop %edi\n"
153 "pop %%esi\n\t" 154 "\tpop %esi\n"
154 "pop %%ebx\n\t" 155 "\tpop %ebx\n"
155#else 156#else
156# error unsupported architecture 157# error unsupported architecture
157#endif 158#endif
158 : "=m" (prev->sp) 159 "\tret\n"
159 : "m" (next->sp) 160);
160 ); 161#endif
162
163#if CORO_PTHREAD
164
165struct coro_init_args {
166 coro_func func;
167 void *arg;
168 coro_context *self, *main;
169};
170
171pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
172
173static void *
174trampoline (void *args_)
175{
176 struct coro_init_args *args = (struct coro_init_args *)args_;
177 coro_func func = args->func;
178 void *arg = args->arg;
179
180 pthread_mutex_lock (&coro_mutex);
181 pthread_cond_destroy (&args->self->c);
182 coro_transfer (args->self, args->main);
183 func (arg);
184 pthread_mutex_unlock (&coro_mutex);
185
186 return 0;
161} 187}
188
189asm("");
190
191void coro_transfer(coro_context *prev, coro_context *next)
192{
193 pthread_cond_init (&prev->c, 0);
194 pthread_cond_signal (&next->c);
195 pthread_cond_wait (&prev->c, &coro_mutex);
196 pthread_cond_destroy (&prev->c);
197}
198
162#endif 199#endif
163 200
164/* initialize a machine state */ 201/* initialize a machine state */
165void coro_create (coro_context *ctx, 202void coro_create (coro_context *ctx,
166 coro_func coro, void *arg, 203 coro_func coro, void *arg,
… …
249#if __CYGWIN__ 286#if __CYGWIN__
250 ctx->env[7] = (long)((char *)sptr + ssize); 287 ctx->env[7] = (long)((char *)sptr + ssize);
251 ctx->env[8] = (long)coro_init; 288 ctx->env[8] = (long)coro_init;
252#elif defined(_M_IX86) 289#elif defined(_M_IX86)
253 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 290 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;
254 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr,ssize); 291 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize);
255#elif defined(_M_AMD64) 292#elif defined(_M_AMD64)
256 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 293 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;
257 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr,ssize); 294 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize);
258#elif defined(_M_IA64) 295#elif defined(_M_IA64)
259 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 296 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;
260 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr,ssize); 297 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize);
261#else 298#else
262#error "microsoft libc or architecture not supported" 299# error "microsoft libc or architecture not supported"
263#endif 300#endif
264 301
265# elif CORO_LINUX 302# elif CORO_LINUX
266 303
267 _setjmp (ctx->env); 304 _setjmp (ctx->env);
… …
288 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); 325 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
289 326
290# elif CORO_ASM 327# elif CORO_ASM
291 328
292 ctx->sp = (volatile void **)(ssize + (char *)sptr); 329 ctx->sp = (volatile void **)(ssize + (char *)sptr);
330 /* we try to allow for both functions with and without frame pointers */
293 *--ctx->sp = (void *)coro_init; 331 *--ctx->sp = (void *)coro_init;
294 *--ctx->sp = (void *)coro_init; // this is needed when the prologue saves ebp 332 {
295 ctx->sp -= NUM_CLOBBERED; 333 int i;
334 for (i = NUM_SAVED; i--; )
335 *--ctx->sp = 0;
336 }
296 337
297# endif 338# endif
298 339
299 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 340 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro);
300 341
342# elif CORO_PTHREAD
343
344 pthread_t id;
345 pthread_attr_t attr;
346 coro_context nctx;
347 struct coro_init_args args;
348 static int once;
349
350 if (!once)
351 {
352 pthread_mutex_lock (&coro_mutex);
353 once = 1;
354 }
355
356 args.func = coro;
357 args.arg = arg;
358 args.self = ctx;
359 args.main = &nctx;
360
361 pthread_attr_init (&attr);
362 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
363 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
364 pthread_create (&id, &attr, trampoline, &args);
365
366 pthread_cond_init (&args.self->c, 0);
367 coro_transfer (args.main, args.self);
368
301#else 369#else
302# error unsupported architecture 370# error unsupported backend
303#endif 371#endif
304} 372}
305 373

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