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Comparing libcoro/coro.c (file contents):
Revision 1.46 by root, Sat Jul 11 14:24:13 2009 UTC vs.
Revision 1.65 by root, Wed Dec 5 13:10:21 2012 UTC

1/* 1/*
2 * Copyright (c) 2001-2009 Marc Alexander Lehmann <schmorp@schmorp.de> 2 * Copyright (c) 2001-2011 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,
… …
86 volatile coro_func func = coro_init_func; 86 volatile coro_func func = coro_init_func;
87 volatile void *arg = coro_init_arg; 87 volatile void *arg = coro_init_arg;
88 88
89 coro_transfer (new_coro, create_coro); 89 coro_transfer (new_coro, create_coro);
90 90
91#if __GCC_HAVE_DWARF2_CFI_ASM && __amd64
92 asm (".cfi_undefined rip");
93#endif
94
91 func ((void *)arg); 95 func ((void *)arg);
92 96
93 /* the new coro returned. bad. just abort() for now */ 97 /* the new coro returned. bad. just abort() for now */
94 abort (); 98 abort ();
95} 99}
… …
110 114
111# endif 115# endif
112 116
113# if CORO_ASM 117# if CORO_ASM
114 118
119 #if _WIN32 || __CYGWIN__
120 #define CORO_WIN_TIB 1
121 #endif
122
115 asm ( 123 asm (
116 ".text\n" 124 "\t.text\n"
125 #if _WIN32 || __CYGWIN__
126 "\t.globl _coro_transfer\n"
127 "_coro_transfer:\n"
128 #else
117 ".globl coro_transfer\n" 129 "\t.globl coro_transfer\n"
118 ".type coro_transfer, @function\n"
119 "coro_transfer:\n" 130 "coro_transfer:\n"
131 #endif
132 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
133 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
120 #if __amd64 134 #if __amd64
135
136 #if _WIN32 || __CYGWIN__
137 #define NUM_SAVED 29
138 "\tsubq $168, %rsp\t" /* one dummy qword to improve alignment */
139 "\tmovaps %xmm6, (%rsp)\n"
140 "\tmovaps %xmm7, 16(%rsp)\n"
141 "\tmovaps %xmm8, 32(%rsp)\n"
142 "\tmovaps %xmm9, 48(%rsp)\n"
143 "\tmovaps %xmm10, 64(%rsp)\n"
144 "\tmovaps %xmm11, 80(%rsp)\n"
145 "\tmovaps %xmm12, 96(%rsp)\n"
146 "\tmovaps %xmm13, 112(%rsp)\n"
147 "\tmovaps %xmm14, 128(%rsp)\n"
148 "\tmovaps %xmm15, 144(%rsp)\n"
149 "\tpushq %rsi\n"
150 "\tpushq %rdi\n"
151 "\tpushq %rbp\n"
152 "\tpushq %rbx\n"
153 "\tpushq %r12\n"
154 "\tpushq %r13\n"
155 "\tpushq %r14\n"
156 "\tpushq %r15\n"
157 #if CORO_WIN_TIB
158 "\tpushq %fs:0x0\n"
159 "\tpushq %fs:0x8\n"
160 "\tpushq %fs:0xc\n"
161 #endif
162 "\tmovq %rsp, (%rcx)\n"
163 "\tmovq (%rdx), %rsp\n"
164 #if CORO_WIN_TIB
165 "\tpopq %fs:0xc\n"
166 "\tpopq %fs:0x8\n"
167 "\tpopq %fs:0x0\n"
168 #endif
169 "\tpopq %r15\n"
170 "\tpopq %r14\n"
171 "\tpopq %r13\n"
172 "\tpopq %r12\n"
173 "\tpopq %rbx\n"
174 "\tpopq %rbp\n"
175 "\tpopq %rdi\n"
176 "\tpopq %rsi\n"
177 "\tmovaps (%rsp), %xmm6\n"
178 "\tmovaps 16(%rsp), %xmm7\n"
179 "\tmovaps 32(%rsp), %xmm8\n"
180 "\tmovaps 48(%rsp), %xmm9\n"
181 "\tmovaps 64(%rsp), %xmm10\n"
182 "\tmovaps 80(%rsp), %xmm11\n"
183 "\tmovaps 96(%rsp), %xmm12\n"
184 "\tmovaps 112(%rsp), %xmm13\n"
185 "\tmovaps 128(%rsp), %xmm14\n"
186 "\tmovaps 144(%rsp), %xmm15\n"
187 "\taddq $168, %rsp\n"
188 #else
121 #define NUM_SAVED 6 189 #define NUM_SAVED 6
122 "\tpush %rbp\n" 190 "\tpushq %rbp\n"
123 "\tpush %rbx\n" 191 "\tpushq %rbx\n"
124 "\tpush %r12\n" 192 "\tpushq %r12\n"
125 "\tpush %r13\n" 193 "\tpushq %r13\n"
126 "\tpush %r14\n" 194 "\tpushq %r14\n"
127 "\tpush %r15\n" 195 "\tpushq %r15\n"
128 "\tmov %rsp, (%rdi)\n" 196 "\tmovq %rsp, (%rdi)\n"
129 "\tmov (%rsi), %rsp\n" 197 "\tmovq (%rsi), %rsp\n"
130 "\tpop %r15\n" 198 "\tpopq %r15\n"
131 "\tpop %r14\n" 199 "\tpopq %r14\n"
132 "\tpop %r13\n" 200 "\tpopq %r13\n"
133 "\tpop %r12\n" 201 "\tpopq %r12\n"
134 "\tpop %rbx\n" 202 "\tpopq %rbx\n"
135 "\tpop %rbp\n" 203 "\tpopq %rbp\n"
204 #endif
205 "\tpopq %rcx\n"
206 "\tjmpq *%rcx\n"
207
136 #elif __i386 208 #elif __i386
209
137 #define NUM_SAVED 4 210 #define NUM_SAVED 4
138 "\tpush %ebp\n" 211 "\tpushl %ebp\n"
139 "\tpush %ebx\n" 212 "\tpushl %ebx\n"
140 "\tpush %esi\n" 213 "\tpushl %esi\n"
141 "\tpush %edi\n" 214 "\tpushl %edi\n"
215 #if CORO_WIN_TIB
216 #undef NUM_SAVED
217 #define NUM_SAVED 7
218 "\tpushl %fs:0\n"
219 "\tpushl %fs:4\n"
220 "\tpushl %fs:8\n"
221 #endif
142 "\tmov %esp, (%eax)\n" 222 "\tmovl %esp, (%eax)\n"
143 "\tmov (%edx), %esp\n" 223 "\tmovl (%edx), %esp\n"
224 #if CORO_WIN_TIB
225 "\tpopl %fs:8\n"
226 "\tpopl %fs:4\n"
227 "\tpopl %fs:0\n"
228 #endif
144 "\tpop %edi\n" 229 "\tpopl %edi\n"
145 "\tpop %esi\n" 230 "\tpopl %esi\n"
146 "\tpop %ebx\n" 231 "\tpopl %ebx\n"
147 "\tpop %ebp\n" 232 "\tpopl %ebp\n"
233 "\tpopl %ecx\n"
234 "\tjmpl *%ecx\n"
235
148 #else 236 #else
149 #error unsupported architecture 237 #error unsupported architecture
150 #endif 238 #endif
151 "\tret\n"
152 ); 239 );
153 240
154# endif 241# endif
155 242
156void 243void
… …
188 perror ("sigaction"); 275 perror ("sigaction");
189 abort (); 276 abort ();
190 } 277 }
191 278
192 /* set the new stack */ 279 /* set the new stack */
193 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 280 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
194 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 281 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
195 nstk.ss_flags = 0; 282 nstk.ss_flags = 0;
196 283
197 if (sigaltstack (&nstk, &ostk) < 0) 284 if (sigaltstack (&nstk, &ostk) < 0)
198 { 285 {
199 perror ("sigaltstack"); 286 perror ("sigaltstack");
… …
223 sigprocmask (SIG_SETMASK, &osig, 0); 310 sigprocmask (SIG_SETMASK, &osig, 0);
224 311
225# elif CORO_LOSER 312# elif CORO_LOSER
226 313
227 coro_setjmp (ctx->env); 314 coro_setjmp (ctx->env);
228 #if __CYGWIN__ 315 #if __CYGWIN__ && __i386
316 ctx->env[8] = (long) coro_init;
229 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 317 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
230 ctx->env[8] = (long)coro_init; 318 #elif __CYGWIN__ && __x86_64
319 ctx->env[7] = (long) coro_init;
320 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
231 #elif defined(__MINGW32__) 321 #elif defined __MINGW32__
322 ctx->env[5] = (long) coro_init;
232 ctx->env[4] = (long)((char *)sptr + ssize) - sizeof (long); 323 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
233 ctx->env[5] = (long)coro_init;
234 #elif defined(_M_IX86) 324 #elif defined _M_IX86
235 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 325 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
236 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 326 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
237 #elif defined(_M_AMD64) 327 #elif defined _M_AMD64
238 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 328 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
239 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 329 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
240 #elif defined(_M_IA64) 330 #elif defined _M_IA64
241 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 331 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
242 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 332 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
243 #else 333 #else
244 #error "microsoft libc or architecture not supported" 334 #error "microsoft libc or architecture not supported"
245 #endif 335 #endif
246 336
247# elif CORO_LINUX 337# elif CORO_LINUX
248 338
249 coro_setjmp (ctx->env); 339 coro_setjmp (ctx->env);
250 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 340 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
251 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 341 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
252 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 342 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
253 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 343 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
254 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 344 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
255 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 345 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
256 #elif defined (__GNU_LIBRARY__) && defined (__i386__) 346 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
257 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 347 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
258 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 348 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
259 #elif defined (__GNU_LIBRARY__) && defined (__amd64__) 349 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
260 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 350 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
261 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 351 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
262 #else 352 #else
263 #error "linux libc or architecture not supported" 353 #error "linux libc or architecture not supported"
264 #endif 354 #endif
265 355
266# elif CORO_IRIX 356# elif CORO_IRIX
267 357
268 coro_setjmp (ctx->env, 0); 358 coro_setjmp (ctx->env, 0);
269 ctx->env[JB_PC] = (__uint64_t)coro_init; 359 ctx->env[JB_PC] = (__uint64_t)coro_init;
270 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 360 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
271 361
272# elif CORO_ASM 362# elif CORO_ASM
273 363
274 ctx->sp = (void **)(ssize + (char *)sptr); 364 ctx->sp = (void **)(ssize + (char *)sptr);
275 *--ctx->sp = (void *)abort; /* needed for alignment only */ 365 *--ctx->sp = (void *)abort; /* needed for alignment only */
276 *--ctx->sp = (void *)coro_init; 366 *--ctx->sp = (void *)coro_init;
367
368 #if CORO_WIN_TIB
369 *--ctx->sp = 0; /* ExceptionList */
370 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
371 *--ctx->sp = sptr; /* StackLimit */
372 #endif
373
277 ctx->sp -= NUM_SAVED; 374 ctx->sp -= NUM_SAVED;
375 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
278 376
279# elif CORO_UCONTEXT 377# elif CORO_UCONTEXT
280 378
281 getcontext (&(ctx->uc)); 379 getcontext (&(ctx->uc));
282 380
… …
370 args.arg = arg; 468 args.arg = arg;
371 args.self = ctx; 469 args.self = ctx;
372 args.main = &nctx; 470 args.main = &nctx;
373 471
374 pthread_attr_init (&attr); 472 pthread_attr_init (&attr);
473#if __UCLIBC__
474 /* exists, but is borked */
475 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
476#elif __CYGWIN__
477 /* POSIX, not here */
478 pthread_attr_setstacksize (&attr, (size_t)ssize);
479#else
375 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 480 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
481#endif
376 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 482 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
377 pthread_create (&ctx->id, &attr, coro_init, &args); 483 pthread_create (&ctx->id, &attr, coro_init, &args);
378 484
379 coro_transfer (args.main, args.self); 485 coro_transfer (args.main, args.self);
380 } 486 }
… …
394 } 500 }
395 501
396 pthread_cond_destroy (&ctx->cv); 502 pthread_cond_destroy (&ctx->cv);
397} 503}
398 504
505/*****************************************************************************/
506/* fiber backend */
507/*****************************************************************************/
508#elif CORO_FIBER
509
510#define WIN32_LEAN_AND_MEAN
511#define _WIN32_WINNT 0x0400
512#include <windows.h>
513
514VOID CALLBACK
515coro_init (PVOID arg)
516{
517 coro_context *ctx = (coro_context *)arg;
518
519 ctx->coro (ctx->arg);
520}
521
522void
523coro_transfer (coro_context *prev, coro_context *next)
524{
525 if (!prev->fiber)
526 {
527 prev->fiber = GetCurrentFiber ();
528
529 if (prev->fiber == 0 || prev->fiber == (void *)0x1e00)
530 prev->fiber = ConvertThreadToFiber (0);
531 }
532
533 SwitchToFiber (next->fiber);
534}
535
536void
537coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
538{
539 ctx->fiber = 0;
540 ctx->coro = coro;
541 ctx->arg = arg;
542
543 if (!coro)
544 return;
545
546 ctx->fiber = CreateFiber (ssize, coro_init, ctx);
547}
548
549void
550coro_destroy (coro_context *ctx)
551{
552 DeleteFiber (ctx->fiber);
553}
554
399#else 555#else
400# error unsupported backend 556# error unsupported backend
401#endif 557#endif
402 558

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