ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libcoro/coro.c
(Generate patch)

Comparing libcoro/coro.c (file contents):
Revision 1.37 by root, Fri Nov 7 16:39:35 2008 UTC vs.
Revision 1.60 by root, Mon Jun 13 09:00:15 2011 UTC

1/* 1/*
2 * Copyright (c) 2001-2008 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,
… …
38 * go to Ralf S. Engelschall <rse@engelschall.com>. 38 * go to Ralf S. Engelschall <rse@engelschall.com>.
39 */ 39 */
40 40
41#include "coro.h" 41#include "coro.h"
42 42
43#include <string.h>
44
45/*****************************************************************************/
46/* ucontext/setjmp/asm backends */
47/*****************************************************************************/
48#if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
49
50# if CORO_UCONTEXT
51# include <stddef.h>
52# endif
53
43#if !defined(STACK_ADJUST_PTR) 54# if !defined(STACK_ADJUST_PTR)
55# if __sgi
44/* IRIX is decidedly NON-unix */ 56/* IRIX is decidedly NON-unix */
45# if __sgi
46# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) 57# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
47# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) 58# define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8)
48# elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) 59# elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER)
49# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) 60# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss))
50# define STACK_ADJUST_SIZE(sp,ss) (ss) 61# define STACK_ADJUST_SIZE(sp,ss) (ss)
51# elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) 62# elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER)
52# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) 63# define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8)
53# define STACK_ADJUST_SIZE(sp,ss) (ss) 64# define STACK_ADJUST_SIZE(sp,ss) (ss)
54# else 65# else
55# define STACK_ADJUST_PTR(sp,ss) (sp) 66# define STACK_ADJUST_PTR(sp,ss) (sp)
56# define STACK_ADJUST_SIZE(sp,ss) (ss) 67# define STACK_ADJUST_SIZE(sp,ss) (ss)
57# endif 68# endif
58#endif 69# endif
59 70
60#if CORO_UCONTEXT
61# include <stddef.h>
62#endif
63
64#if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
65
66#include <stdlib.h> 71# include <stdlib.h>
67 72
68#if CORO_SJLJ 73# if CORO_SJLJ
69# include <stdio.h> 74# include <stdio.h>
70# include <signal.h> 75# include <signal.h>
71# include <unistd.h> 76# include <unistd.h>
72#endif 77# endif
73 78
74static volatile coro_func coro_init_func; 79static coro_func coro_init_func;
75static volatile void *coro_init_arg; 80static void *coro_init_arg;
76static volatile coro_context *new_coro, *create_coro; 81static coro_context *new_coro, *create_coro;
77
78/* what we really want to detect here is wether we use a new-enough version of GAS */
79/* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */
80#if __GNUC__ >= 3 && __ELF__ && __linux__
81# define HAVE_CFI 1
82#endif
83 82
84static void 83static void
85coro_init (void) 84coro_init (void)
86{ 85{
87 volatile coro_func func = coro_init_func; 86 volatile coro_func func = coro_init_func;
88 volatile void *arg = coro_init_arg; 87 volatile void *arg = coro_init_arg;
89 88
90 coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); 89 coro_transfer (new_coro, create_coro);
90
91#if __linux && __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");
94#endif
91 95
92 func ((void *)arg); 96 func ((void *)arg);
93 97
94 /* the new coro returned. bad. just abort() for now */ 98 /* the new coro returned. bad. just abort() for now */
95 abort (); 99 abort ();
96} 100}
97 101
98# if CORO_SJLJ 102# if CORO_SJLJ
99 103
100static volatile int trampoline_count; 104static volatile int trampoline_done;
101 105
102/* trampoline signal handler */ 106/* trampoline signal handler */
103static void 107static void
104trampoline (int sig) 108trampoline (int sig)
105{ 109{
106 if (setjmp (((coro_context *)new_coro)->env)) 110 if (coro_setjmp (new_coro->env))
107 {
108#if HAVE_CFI
109 asm (".cfi_startproc");
110#endif
111 coro_init (); /* start it */ 111 coro_init (); /* start it */
112#if HAVE_CFI
113 asm (".cfi_endproc");
114#endif
115 }
116 else 112 else
117 trampoline_count++; 113 trampoline_done = 1;
118} 114}
119 115
120# endif
121
122#endif 116# endif
123 117
124#if CORO_ASM 118# if CORO_ASM
119
120 #if _WIN32
121 #define CORO_WIN_TIB 1
122 #endif
123
125asm ( 124 asm (
126 ".text\n" 125 "\t.text\n"
127 ".globl coro_transfer\n" 126 "\t.globl coro_transfer\n"
128 ".type coro_transfer, @function\n"
129 "coro_transfer:\n" 127 "coro_transfer:\n"
128 /* 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 */
130#if __amd64 130 #if __amd64
131# define NUM_SAVED 6 131 #ifdef WIN32
132 /* TODO: xmm6..15 also would need to be saved. sigh. */
133 #define NUM_SAVED 8
134 "\tpushq %rsi\n"
135 "\tpushq %rdi\n"
132 "\tpush %rbp\n" 136 "\tpushq %rbp\n"
133 "\tpush %rbx\n" 137 "\tpushq %rbx\n"
134 "\tpush %r12\n" 138 "\tpushq %r12\n"
135 "\tpush %r13\n" 139 "\tpushq %r13\n"
136 "\tpush %r14\n" 140 "\tpushq %r14\n"
137 "\tpush %r15\n" 141 "\tpushq %r15\n"
142 #if CORO_WIN_TIB
143 "\tpushq %fs:0x0\n"
144 "\tpushq %fs:0x8\n"
145 "\tpushq %fs:0xc\n"
146 #endif
147 "\tmovq %rsp, (%rcx)\n"
148 "\tmovq (%rdx), %rsp\n"
149 #if CORO_WIN_TIB
150 "\tpopq %fs:0xc\n"
151 "\tpopq %fs:0x8\n"
152 "\tpopq %fs:0x0\n"
153 #endif
154 "\tpopq %r15\n"
155 "\tpopq %r14\n"
156 "\tpopq %r13\n"
157 "\tpopq %r12\n"
158 "\tpopq %rbx\n"
159 "\tpopq %rbp\n"
160 "\tpopq %rdi\n"
161 "\tpopq %rsi\n"
162 #else
163 #define NUM_SAVED 6
164 "\tpushq %rbp\n"
165 "\tpushq %rbx\n"
166 "\tpushq %r12\n"
167 "\tpushq %r13\n"
168 "\tpushq %r14\n"
169 "\tpushq %r15\n"
138 "\tmov %rsp, (%rdi)\n" 170 "\tmovq %rsp, (%rdi)\n"
139 "\tmov (%rsi), %rsp\n" 171 "\tmovq (%rsi), %rsp\n"
140 "\tpop %r15\n" 172 "\tpopq %r15\n"
141 "\tpop %r14\n" 173 "\tpopq %r14\n"
142 "\tpop %r13\n" 174 "\tpopq %r13\n"
143 "\tpop %r12\n" 175 "\tpopq %r12\n"
144 "\tpop %rbx\n" 176 "\tpopq %rbx\n"
145 "\tpop %rbp\n" 177 "\tpopq %rbp\n"
178 #endif
146#elif __i386 179 #elif __i386
147# define NUM_SAVED 4 180 #define NUM_SAVED 4
148 "\tpush %ebp\n" 181 "\tpushl %ebp\n"
149 "\tpush %ebx\n" 182 "\tpushl %ebx\n"
150 "\tpush %esi\n" 183 "\tpushl %esi\n"
151 "\tpush %edi\n" 184 "\tpushl %edi\n"
185 #if CORO_WIN_TIB
186 "\tpushl %fs:0\n"
187 "\tpushl %fs:4\n"
188 "\tpushl %fs:8\n"
189 #endif
152 "\tmov %esp, (%eax)\n" 190 "\tmovl %esp, (%eax)\n"
153 "\tmov (%edx), %esp\n" 191 "\tmovl (%edx), %esp\n"
192 #if CORO_WIN_TIB
193 "\tpopl %fs:8\n"
194 "\tpopl %fs:4\n"
195 "\tpopl %fs:0\n"
196 #endif
154 "\tpop %edi\n" 197 "\tpopl %edi\n"
155 "\tpop %esi\n" 198 "\tpopl %esi\n"
156 "\tpop %ebx\n" 199 "\tpopl %ebx\n"
157 "\tpop %ebp\n" 200 "\tpopl %ebp\n"
158#else 201 #else
159# error unsupported architecture 202 #error unsupported architecture
160#endif 203 #endif
161 "\tret\n" 204 "\tret\n"
162); 205 );
206
163#endif 207# endif
164 208
165#if CORO_PTHREAD 209void
166 210coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
167struct coro_init_args {
168 coro_func func;
169 void *arg;
170 coro_context *self, *main;
171};
172
173pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
174
175static void *
176trampoline (void *args_)
177{ 211{
178 struct coro_init_args *args = (struct coro_init_args *)args_; 212 coro_context nctx;
179 coro_func func = args->func;
180 void *arg = args->arg;
181
182 pthread_mutex_lock (&coro_mutex);
183 pthread_cond_destroy (&args->self->c);
184 coro_transfer (args->self, args->main);
185 func (arg);
186 pthread_mutex_unlock (&coro_mutex);
187
188 return 0;
189}
190
191asm("");
192
193void coro_transfer(coro_context *prev, coro_context *next)
194{
195 pthread_cond_init (&prev->c, 0);
196 pthread_cond_signal (&next->c);
197 pthread_cond_wait (&prev->c, &coro_mutex);
198 pthread_cond_destroy (&prev->c);
199}
200
201#endif
202
203/* initialize a machine state */
204void coro_create (coro_context *ctx,
205 coro_func coro, void *arg,
206 void *sptr, long ssize)
207{
208#if CORO_UCONTEXT
209
210 getcontext (&(ctx->uc));
211
212 ctx->uc.uc_link = 0;
213 ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
214 ctx->uc.uc_stack.ss_size = (size_t)STACK_ADJUST_SIZE (sptr,ssize);
215 ctx->uc.uc_stack.ss_flags = 0;
216
217 makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
218
219#elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM
220
221# if CORO_SJLJ 213# if CORO_SJLJ
222 stack_t ostk, nstk; 214 stack_t ostk, nstk;
223 struct sigaction osa, nsa; 215 struct sigaction osa, nsa;
224 sigset_t nsig, osig; 216 sigset_t nsig, osig;
225# endif 217# endif
226 coro_context nctx; 218
219 if (!coro)
220 return;
227 221
228 coro_init_func = coro; 222 coro_init_func = coro;
229 coro_init_arg = arg; 223 coro_init_arg = arg;
230 224
231 new_coro = ctx; 225 new_coro = ctx;
… …
247 perror ("sigaction"); 241 perror ("sigaction");
248 abort (); 242 abort ();
249 } 243 }
250 244
251 /* set the new stack */ 245 /* set the new stack */
252 nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ 246 nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
253 nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); 247 nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
254 nstk.ss_flags = 0; 248 nstk.ss_flags = 0;
255 249
256 if (sigaltstack (&nstk, &ostk) < 0) 250 if (sigaltstack (&nstk, &ostk) < 0)
257 { 251 {
258 perror ("sigaltstack"); 252 perror ("sigaltstack");
259 abort (); 253 abort ();
260 } 254 }
261 255
262 trampoline_count = 0; 256 trampoline_done = 0;
263 kill (getpid (), SIGUSR2); 257 kill (getpid (), SIGUSR2);
264 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); 258 sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
265 259
266 while (!trampoline_count) 260 while (!trampoline_done)
267 sigsuspend (&nsig); 261 sigsuspend (&nsig);
268 262
269 sigaltstack (0, &nstk); 263 sigaltstack (0, &nstk);
270 nstk.ss_flags = SS_DISABLE; 264 nstk.ss_flags = SS_DISABLE;
271 if (sigaltstack (&nstk, 0) < 0) 265 if (sigaltstack (&nstk, 0) < 0)
… …
277 271
278 if (~ostk.ss_flags & SS_DISABLE) 272 if (~ostk.ss_flags & SS_DISABLE)
279 sigaltstack (&ostk, 0); 273 sigaltstack (&ostk, 0);
280 274
281 sigaction (SIGUSR2, &osa, 0); 275 sigaction (SIGUSR2, &osa, 0);
282
283 sigprocmask (SIG_SETMASK, &osig, 0); 276 sigprocmask (SIG_SETMASK, &osig, 0);
284 277
285# elif CORO_LOSER 278# elif CORO_LOSER
286 279
287 setjmp (ctx->env); 280 coro_setjmp (ctx->env);
288#if __CYGWIN__ 281 #if __CYGWIN__ && __i386
282 ctx->env[8] = (long) coro_init;
289 ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); 283 ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
290 ctx->env[8] = (long)coro_init; 284 #elif __CYGWIN__ && __x86_64
285 ctx->env[7] = (long) coro_init;
286 ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
287 #elif defined(__MINGW32__)
288 ctx->env[5] = (long) coro_init;
289 ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
291#elif defined(_M_IX86) 290 #elif defined(_M_IX86)
292 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; 291 ((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
293 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 292 ((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
294#elif defined(_M_AMD64) 293 #elif defined(_M_AMD64)
295 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; 294 ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
296 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 295 ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
297#elif defined(_M_IA64) 296 #elif defined(_M_IA64)
298 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; 297 ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
299 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 298 ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
300#else 299 #else
301# error "microsoft libc or architecture not supported" 300 #error "microsoft libc or architecture not supported"
302#endif 301 #endif
303 302
304# elif CORO_LINUX 303# elif CORO_LINUX
305 304
306 _setjmp (ctx->env); 305 coro_setjmp (ctx->env);
307#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) 306 #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
308 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 307 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
309 ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 308 ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
310#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) 309 #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
311 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; 310 ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
312 ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); 311 ctx->env[0].__jmpbuf[0].__sp = (int *) ((char *)sptr + ssize) - sizeof (long);
313#elif defined (__GNU_LIBRARY__) && defined (__i386__) 312 #elif defined (__GNU_LIBRARY__) && defined (__i386__)
314 ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; 313 ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
315 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 314 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
316#elif defined (__GNU_LIBRARY__) && defined (__amd64__) 315 #elif defined (__GNU_LIBRARY__) && defined (__amd64__)
317 ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; 316 ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
318 ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); 317 ctx->env[0].__jmpbuf[0].__sp = (void *) ((char *)sptr + ssize) - sizeof (long);
319#else 318 #else
320# error "linux libc or architecture not supported" 319 #error "linux libc or architecture not supported"
321#endif 320 #endif
322 321
323# elif CORO_IRIX 322# elif CORO_IRIX
324 323
325 setjmp (ctx->env); 324 coro_setjmp (ctx->env, 0);
326 ctx->env[JB_PC] = (__uint64_t)coro_init; 325 ctx->env[JB_PC] = (__uint64_t)coro_init;
327 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); 326 ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
328 327
329# elif CORO_ASM 328# elif CORO_ASM
330 329
331 ctx->sp = (volatile void **)(ssize + (char *)sptr); 330 ctx->sp = (void **)(ssize + (char *)sptr);
332 *--ctx->sp = (void *)abort; /* needed for alignment only */ 331 *--ctx->sp = (void *)abort; /* needed for alignment only */
333 *--ctx->sp = (void *)coro_init; 332 *--ctx->sp = (void *)coro_init;
333
334 #if CORO_WIN_TIB
335 *--ctx->sp = 0; /* ExceptionList */
336 *--ctx->sp = (char *)sptr + ssize; /* StackBase */
337 *--ctx->sp = sptr; /* StackLimit */
338 #endif
339
334 ctx->sp -= NUM_SAVED; 340 ctx->sp -= NUM_SAVED;
341 memset (ctx->sp, 0, sizeof (*ctx->sp) * NUM_SAVED);
335 342
336# endif 343# elif CORO_UCONTEXT
337 344
338 coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); 345 getcontext (&(ctx->uc));
339 346
347 ctx->uc.uc_link = 0;
348 ctx->uc.uc_stack.ss_sp = sptr;
349 ctx->uc.uc_stack.ss_size = (size_t)ssize;
350 ctx->uc.uc_stack.ss_flags = 0;
351
352 makecontext (&(ctx->uc), (void (*)())coro_init, 0);
353
354# endif
355
356 coro_transfer (create_coro, new_coro);
357}
358
359/*****************************************************************************/
360/* pthread backend */
361/*****************************************************************************/
340# elif CORO_PTHREAD 362#elif CORO_PTHREAD
341 363
342 pthread_t id; 364/* this mutex will be locked by the running coroutine */
343 pthread_attr_t attr; 365pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
366
367struct coro_init_args
368{
369 coro_func func;
370 void *arg;
371 coro_context *self, *main;
372};
373
374static pthread_t null_tid;
375
376/* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */
377static void
378mutex_unlock_wrapper (void *arg)
379{
380 pthread_mutex_unlock ((pthread_mutex_t *)arg);
381}
382
383static void *
384coro_init (void *args_)
385{
386 struct coro_init_args *args = (struct coro_init_args *)args_;
387 coro_func func = args->func;
388 void *arg = args->arg;
389
390 pthread_mutex_lock (&coro_mutex);
391
392 /* we try to be good citizens and use deferred cancellation and cleanup handlers */
393 pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex);
394 coro_transfer (args->self, args->main);
395 func (arg);
396 pthread_cleanup_pop (1);
397
398 return 0;
399}
400
401void
402coro_transfer (coro_context *prev, coro_context *next)
403{
404 pthread_cond_signal (&next->cv);
405 pthread_cond_wait (&prev->cv, &coro_mutex);
406#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
407 pthread_testcancel ();
408#endif
409}
410
411void
412coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize)
413{
344 coro_context nctx; 414 static coro_context nctx;
345 struct coro_init_args args;
346 static int once; 415 static int once;
347 416
348 if (!once) 417 if (!once)
349 { 418 {
419 once = 1;
420
350 pthread_mutex_lock (&coro_mutex); 421 pthread_mutex_lock (&coro_mutex);
351 once = 1; 422 pthread_cond_init (&nctx.cv, 0);
423 null_tid = pthread_self ();
352 } 424 }
353 425
426 pthread_cond_init (&ctx->cv, 0);
427
428 if (coro)
429 {
430 pthread_attr_t attr;
431 struct coro_init_args args;
432
354 args.func = coro; 433 args.func = coro;
355 args.arg = arg; 434 args.arg = arg;
356 args.self = ctx; 435 args.self = ctx;
357 args.main = &nctx; 436 args.main = &nctx;
358 437
359 pthread_attr_init (&attr); 438 pthread_attr_init (&attr);
360 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 439#if __UCLIBC__
440 /* exists, but is borked */
441 /*pthread_attr_setstacksize (&attr, (size_t)ssize);*/
442#else
361 pthread_attr_setstack (&attr, sptr, (size_t)ssize); 443 pthread_attr_setstack (&attr, sptr, (size_t)ssize);
444#endif
445 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
362 pthread_create (&id, &attr, trampoline, &args); 446 pthread_create (&ctx->id, &attr, coro_init, &args);
363 447
364 pthread_cond_init (&args.self->c, 0);
365 coro_transfer (args.main, args.self); 448 coro_transfer (args.main, args.self);
449 }
450 else
451 ctx->id = null_tid;
452}
453
454void
455coro_destroy (coro_context *ctx)
456{
457 if (!pthread_equal (ctx->id, null_tid))
458 {
459 pthread_cancel (ctx->id);
460 pthread_mutex_unlock (&coro_mutex);
461 pthread_join (ctx->id, 0);
462 pthread_mutex_lock (&coro_mutex);
463 }
464
465 pthread_cond_destroy (&ctx->cv);
466}
366 467
367#else 468#else
368# error unsupported backend 469# error unsupported backend
369#endif 470#endif
370}
371 471

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines