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Comparing libcoro/coro.c (file contents):
Revision 1.60 by root, Mon Jun 13 09:00:15 2011 UTC vs.
Revision 1.64 by root, Wed Dec 5 13:01:18 2012 UTC

1/* 1/*
2 * Copyright (c) 2001-2011 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 __linux && __amd64 91#if __GCC_HAVE_DWARF2_CFI_ASM && __amd64
92 /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */
93 asm (".cfi_undefined rip"); 92 asm (".cfi_undefined rip");
94#endif 93#endif
95 94
96 func ((void *)arg); 95 func ((void *)arg);
97 96
… …
115 114
116# endif 115# endif
117 116
118# if CORO_ASM 117# if CORO_ASM
119 118
120 #if _WIN32 119 #if _WIN32 || __CYGWIN__
121 #define CORO_WIN_TIB 1 120 #define CORO_WIN_TIB 1
122 #endif 121 #endif
123 122
124 asm ( 123 asm (
125 "\t.text\n" 124 "\t.text\n"
125 #if _WIN32 || __CYGWIN__
126 "\t.globl _coro_transfer\n"
127 "_coro_transfer:\n"
128 #else
126 "\t.globl coro_transfer\n" 129 "\t.globl coro_transfer\n"
127 "coro_transfer:\n" 130 "coro_transfer:\n"
131 #endif
128 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */ 132 /* windows, of course, gives a shit on the amd64 ABI and uses different registers */
129 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */ 133 /* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
130 #if __amd64 134 #if __amd64
131 #ifdef WIN32 135
132 /* TODO: xmm6..15 also would need to be saved. sigh. */ 136 #if _WIN32 || __CYGWIN__
133 #define NUM_SAVED 8 137 #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"
134 "\tpushq %rsi\n" 149 "\tpushq %rsi\n"
135 "\tpushq %rdi\n" 150 "\tpushq %rdi\n"
136 "\tpushq %rbp\n" 151 "\tpushq %rbp\n"
137 "\tpushq %rbx\n" 152 "\tpushq %rbx\n"
138 "\tpushq %r12\n" 153 "\tpushq %r12\n"
… …
157 "\tpopq %r12\n" 172 "\tpopq %r12\n"
158 "\tpopq %rbx\n" 173 "\tpopq %rbx\n"
159 "\tpopq %rbp\n" 174 "\tpopq %rbp\n"
160 "\tpopq %rdi\n" 175 "\tpopq %rdi\n"
161 "\tpopq %rsi\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"
162 #else 188 #else
163 #define NUM_SAVED 6 189 #define NUM_SAVED 6
164 "\tpushq %rbp\n" 190 "\tpushq %rbp\n"
165 "\tpushq %rbx\n" 191 "\tpushq %rbx\n"
166 "\tpushq %r12\n" 192 "\tpushq %r12\n"
… …
174 "\tpopq %r13\n" 200 "\tpopq %r13\n"
175 "\tpopq %r12\n" 201 "\tpopq %r12\n"
176 "\tpopq %rbx\n" 202 "\tpopq %rbx\n"
177 "\tpopq %rbp\n" 203 "\tpopq %rbp\n"
178 #endif 204 #endif
205 "\tpopq %rcx\n"
206 "\tjmpq *%rcx\n"
207
179 #elif __i386 208 #elif __i386
209
180 #define NUM_SAVED 4 210 #define NUM_SAVED 4
181 "\tpushl %ebp\n" 211 "\tpushl %ebp\n"
182 "\tpushl %ebx\n" 212 "\tpushl %ebx\n"
183 "\tpushl %esi\n" 213 "\tpushl %esi\n"
184 "\tpushl %edi\n" 214 "\tpushl %edi\n"
185 #if CORO_WIN_TIB 215 #if CORO_WIN_TIB
216 #undef NUM_SAVED
217 #define NUM_SAVED 7
186 "\tpushl %fs:0\n" 218 "\tpushl %fs:0\n"
187 "\tpushl %fs:4\n" 219 "\tpushl %fs:4\n"
188 "\tpushl %fs:8\n" 220 "\tpushl %fs:8\n"
189 #endif 221 #endif
190 "\tmovl %esp, (%eax)\n" 222 "\tmovl %esp, (%eax)\n"
… …
196 #endif 228 #endif
197 "\tpopl %edi\n" 229 "\tpopl %edi\n"
198 "\tpopl %esi\n" 230 "\tpopl %esi\n"
199 "\tpopl %ebx\n" 231 "\tpopl %ebx\n"
200 "\tpopl %ebp\n" 232 "\tpopl %ebp\n"
233 "\tpopl %ecx\n"
234 "\tjmpl *%ecx\n"
235
201 #else 236 #else
202 #error unsupported architecture 237 #error unsupported architecture
203 #endif 238 #endif
204 "\tret\n"
205 ); 239 );
206 240
207# endif 241# endif
208 242
209void 243void
… …
282 ctx->env[8] = (long) coro_init; 316 ctx->env[8] = (long) coro_init;
283 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long); 317 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
284 #elif __CYGWIN__ && __x86_64 318 #elif __CYGWIN__ && __x86_64
285 ctx->env[7] = (long) coro_init; 319 ctx->env[7] = (long) coro_init;
286 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long); 320 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
287 #elif defined(__MINGW32__) 321 #elif defined __MINGW32__
288 ctx->env[5] = (long) coro_init; 322 ctx->env[5] = (long) coro_init;
289 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long); 323 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
290 #elif defined(_M_IX86) 324 #elif defined _M_IX86
291 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init; 325 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
292 ((_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);
293 #elif defined(_M_AMD64) 327 #elif defined _M_AMD64
294 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init; 328 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
295 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); 329 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
296 #elif defined(_M_IA64) 330 #elif defined _M_IA64
297 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init; 331 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
298 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64); 332 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
299 #else 333 #else
300 #error "microsoft libc or architecture not supported" 334 #error "microsoft libc or architecture not supported"
301 #endif 335 #endif
… …
437 471
438 pthread_attr_init (&attr); 472 pthread_attr_init (&attr);
439#if __UCLIBC__ 473#if __UCLIBC__
440 /* exists, but is borked */ 474 /* exists, but is borked */
441 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/ 475 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
476#elif __CYGWIN__
477 /* POSIX, not here */
478 pthread_attr_setstacksize (&attr, (size_t)ssize);
442#else 479#else
443 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 480 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
444#endif 481#endif
445 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); 482 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
446 pthread_create (&ctx->id, &attr, coro_init, &args); 483 pthread_create (&ctx->id, &attr, coro_init, &args);
… …
463 } 500 }
464 501
465 pthread_cond_destroy (&ctx->cv); 502 pthread_cond_destroy (&ctx->cv);
466} 503}
467 504
505/*****************************************************************************/
506/* fiber backend */
507/*****************************************************************************/
508#elif CORO_FIBER
509
510#define WIN32_LEAN_AND_MEAN
511#include <windows.h>
512
513VOID CALLBACK
514coro_init (PVOID arg)
515{
516 coro_context *ctx = (coro_context *)arg;
517
518 ctx->coro (ctx->arg);
519}
520
521void
522coro_transfer (coro_context *prev, coro_context *next)
523{
524 if (!prev->fiber)
525 {
526 prev->fiber = GetCurrentFiber ();
527
528 if (prev->fiber == 0 || prev->fiber == (void *)0x1e00)
529 prev->fiber = ConvertThreadToFiber (0);
530 }
531
532 SwitchToFiber (next->fiber);
533}
534
535void
536coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
537{
538 ctx->fiber = 0;
539 ctx->coro = coro;
540 ctx->arg = arg;
541
542 if (!coro)
543 return;
544
545 ctx->fiber = CreateFiber (ssize, coro_init, ctx);
546}
547
548void
549coro_destroy (coro_context *ctx)
550{
551 DeleteFiber (ctx->fiber);
552}
553
468#else 554#else
469# error unsupported backend 555# error unsupported backend
470#endif 556#endif
471 557

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