[ViewVC] Diff of: cvs/libcoro/coro.c

Comparing libcoro/coro.c (file contents):
Revision 1.36 by root, Wed Nov 5 01:54:34 2008 UTC vs.
Revision 1.56 by root, Mon May 30 02:32:06 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
74	static volatile coro_func coro_init_func;	79	static coro_func coro_init_func;
75	static volatile void *coro_init_arg;	80	static void *coro_init_arg;
76	static volatile coro_context new_coro, create_coro;	81	static 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
84	static void	83	static void
85	coro_init (void)	84	coro_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	#ifdef __linux && __elf
		92	/* we blindly assume on any __linux with __elf 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
100	static volatile int trampoline_count;	104	static volatile int trampoline_done;
101		105
102	/* trampoline signal handler */	106	/* trampoline signal handler */
103	static void	107	static void
104	trampoline (int sig)	108	trampoline (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
125	asm (	120	asm (
126	".text\n"	121	".text\n"
127	".globl coro_transfer\n"	122	".globl coro_transfer\n"
128	".type coro_transfer, @function\n"	123	".type coro_transfer, @function\n"
129	"coro_transfer:\n"	124	"coro_transfer:\n"
		125	/* windows, of course, gives a shit on the amd64 ABI and uses different registers */
		126	/* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
130	#if __amd64	127	#if __amd64
131	# define NUM_ALIGN 1
132	# define NUM_SAVED 5	128	#define NUM_SAVED 6
		129	"\tpush %rbp\n"
133	"\tpush %rbx\n"	130	"\tpush %rbx\n"
134	"\tpush %r12\n"	131	"\tpush %r12\n"
135	"\tpush %r13\n"	132	"\tpush %r13\n"
136	"\tpush %r14\n"	133	"\tpush %r14\n"
137	"\tpush %r15\n"	134	"\tpush %r15\n"
		135	#if CORO_WIN_TIB
		136	"\tpush %gs:0x0\n"
		137	"\tpush %gs:0x8\n"
		138	"\tpush %gs:0xc\n"
		139	#endif
138	"\tmov %rsp, (%rdi)\n"	140	"\tmov %rsp, (%rdi)\n"
139	"\tmov (%rsi), %rsp\n"	141	"\tmov (%rsi), %rsp\n"
		142	#if CORO_WIN_TIB
		143	"\tpop %gs:0xc\n"
		144	"\tpop %gs:0x8\n"
		145	"\tpop %gs:0x0\n"
		146	#endif
140	"\tpop %r15\n"	147	"\tpop %r15\n"
141	"\tpop %r14\n"	148	"\tpop %r14\n"
142	"\tpop %r13\n"	149	"\tpop %r13\n"
143	"\tpop %r12\n"	150	"\tpop %r12\n"
144	"\tpop %rbx\n"	151	"\tpop %rbx\n"
		152	"\tpop %rbp\n"
145	#elif __i386	153	#elif __i386
146	# define NUM_ALIGN 1
147	# define NUM_SAVED 4	154	#define NUM_SAVED 4
148	"\tpush %ebx\n"
149	"\tpush %esi\n"
150	"\tpush %edi\n"
151	"\tpush %ebp\n"	155	"\tpush %ebp\n"
		156	"\tpush %ebx\n"
		157	"\tpush %esi\n"
		158	"\tpush %edi\n"
		159	#if CORO_WIN_TIB
		160	"\tpush %fs:0\n"
		161	"\tpush %fs:4\n"
		162	"\tpush %fs:8\n"
		163	#endif
152	"\tmov %esp, (%eax)\n"	164	"\tmov %esp, (%eax)\n"
153	"\tmov (%edx), %esp\n"	165	"\tmov (%edx), %esp\n"
154	"\tpop %ebp\n"	166	#if CORO_WIN_TIB
		167	"\tpop %fs:8\n"
		168	"\tpop %fs:4\n"
		169	"\tpop %fs:0\n"
		170	#endif
155	"\tpop %edi\n"	171	"\tpop %edi\n"
156	"\tpop %esi\n"	172	"\tpop %esi\n"
157	"\tpop %ebx\n"	173	"\tpop %ebx\n"
158	#else	174	"\tpop %ebp\n"
		175	#else
159	# error unsupported architecture	176	#error unsupported architecture
160	#endif	177	#endif
161	"\tret\n"	178	"\tret\n"
162	);	179	);
		180
163	#endif	181	# endif
164		182
165	#if CORO_PTHREAD	183	void
166		184	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
167	struct coro_init_args {
168	coro_func func;
169	void *arg;
170	coro_context self, main;
171	};
172
173	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
174
175	static void *
176	trampoline (void *args_)
177	{	185	{
178	struct coro_init_args args = (struct coro_init_args )args_;	186	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
191	asm("");
192
193	void 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 */
204	void 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	187	# if CORO_SJLJ
222	stack_t ostk, nstk;	188	stack_t ostk, nstk;
223	struct sigaction osa, nsa;	189	struct sigaction osa, nsa;
224	sigset_t nsig, osig;	190	sigset_t nsig, osig;
225	# endif	191	# endif
226	coro_context nctx;	192
		193	if (!coro)
		194	return;
227		195
228	coro_init_func = coro;	196	coro_init_func = coro;
229	coro_init_arg = arg;	197	coro_init_arg = arg;
230		198
231	new_coro = ctx;	199	new_coro = ctx;
…		…
247	perror ("sigaction");	215	perror ("sigaction");
248	abort ();	216	abort ();
249	}	217	}
250		218
251	/* set the new stack */	219	/* set the new stack */
252	nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */	220	nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
253	nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);	221	nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
254	nstk.ss_flags = 0;	222	nstk.ss_flags = 0;
255		223
256	if (sigaltstack (&nstk, &ostk) < 0)	224	if (sigaltstack (&nstk, &ostk) < 0)
257	{	225	{
258	perror ("sigaltstack");	226	perror ("sigaltstack");
259	abort ();	227	abort ();
260	}	228	}
261		229
262	trampoline_count = 0;	230	trampoline_done = 0;
263	kill (getpid (), SIGUSR2);	231	kill (getpid (), SIGUSR2);
264	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);	232	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
265		233
266	while (!trampoline_count)	234	while (!trampoline_done)
267	sigsuspend (&nsig);	235	sigsuspend (&nsig);
268		236
269	sigaltstack (0, &nstk);	237	sigaltstack (0, &nstk);
270	nstk.ss_flags = SS_DISABLE;	238	nstk.ss_flags = SS_DISABLE;
271	if (sigaltstack (&nstk, 0) < 0)	239	if (sigaltstack (&nstk, 0) < 0)
…		…
277		245
278	if (~ostk.ss_flags & SS_DISABLE)	246	if (~ostk.ss_flags & SS_DISABLE)
279	sigaltstack (&ostk, 0);	247	sigaltstack (&ostk, 0);
280		248
281	sigaction (SIGUSR2, &osa, 0);	249	sigaction (SIGUSR2, &osa, 0);
282
283	sigprocmask (SIG_SETMASK, &osig, 0);	250	sigprocmask (SIG_SETMASK, &osig, 0);
284		251
285	# elif CORO_LOSER	252	# elif CORO_LOSER
286		253
287	setjmp (ctx->env);	254	coro_setjmp (ctx->env);
288	#if __CYGWIN__	255	#if __CYGWIN__ && __i386
		256	ctx->env[8] = (long) coro_init;
289	ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long);	257	ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
290	ctx->env[8] = (long)coro_init;	258	#elif __CYGWIN__ && __x86_64
		259	ctx->env[7] = (long) coro_init;
		260	ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
		261	#elif defined(__MINGW32__)
		262	ctx->env[5] = (long) coro_init;
		263	ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
291	#elif defined(_M_IX86)	264	#elif defined(_M_IX86)
292	((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;	265	((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
293	((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);	266	((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
294	#elif defined(_M_AMD64)	267	#elif defined(_M_AMD64)
295	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;	268	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
296	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);	269	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
297	#elif defined(_M_IA64)	270	#elif defined(_M_IA64)
298	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;	271	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
299	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);	272	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
300	#else	273	#else
301	# error "microsoft libc or architecture not supported"	274	#error "microsoft libc or architecture not supported"
		275	#endif
		276
		277	# elif CORO_LINUX
		278
		279	coro_setjmp (ctx->env);
		280	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
		281	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		282	ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		283	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
		284	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
		285	ctx->env[0].__jmpbuf[0].__sp = (int ) ((char )sptr + ssize) - sizeof (long);
		286	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
		287	ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
		288	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		289	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
		290	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		291	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		292	#else
		293	#error "linux libc or architecture not supported"
		294	#endif
		295
		296	# elif CORO_IRIX
		297
		298	coro_setjmp (ctx->env, 0);
		299	ctx->env[JB_PC] = (__uint64_t)coro_init;
		300	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		301
		302	# elif CORO_ASM
		303
		304	ctx->sp = (void *)(ssize + (char )sptr);
		305	--ctx->sp = (void )abort; /* needed for alignment only */
		306	--ctx->sp = (void )coro_init;
		307
		308	#if CORO_WIN_TIB
		309	--ctx->sp = 0; / ExceptionList */
		310	--ctx->sp = (char )sptr + ssize; /* StackBase */
		311	--ctx->sp = sptr; / StackLimit */
		312	#endif
		313
		314	ctx->sp -= NUM_SAVED;
		315	memset (ctx->sp, 0, sizeof (ctx->sp) NUM_SAVED);
		316
		317	# elif CORO_UCONTEXT
		318
		319	getcontext (&(ctx->uc));
		320
		321	ctx->uc.uc_link = 0;
		322	ctx->uc.uc_stack.ss_sp = sptr;
		323	ctx->uc.uc_stack.ss_size = (size_t)ssize;
		324	ctx->uc.uc_stack.ss_flags = 0;
		325
		326	makecontext (&(ctx->uc), (void (*)())coro_init, 0);
		327
		328	# endif
		329
		330	coro_transfer (create_coro, new_coro);
		331	}
		332
		333	/*****************************************************************************/
		334	/* pthread backend */
		335	/*****************************************************************************/
		336	#elif CORO_PTHREAD
		337
		338	/* this mutex will be locked by the running coroutine */
		339	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
		340
		341	struct coro_init_args
		342	{
		343	coro_func func;
		344	void *arg;
		345	coro_context self, main;
		346	};
		347
		348	static pthread_t null_tid;
		349
		350	/* I'd so love to cast pthread_mutex_unlock to void ()(void )... */
		351	static void
		352	mutex_unlock_wrapper (void *arg)
		353	{
		354	pthread_mutex_unlock ((pthread_mutex_t *)arg);
		355	}
		356
		357	static void *
		358	coro_init (void *args_)
		359	{
		360	struct coro_init_args args = (struct coro_init_args )args_;
		361	coro_func func = args->func;
		362	void *arg = args->arg;
		363
		364	pthread_mutex_lock (&coro_mutex);
		365
		366	/* we try to be good citizens and use deferred cancellation and cleanup handlers */
		367	pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex);
		368	coro_transfer (args->self, args->main);
		369	func (arg);
		370	pthread_cleanup_pop (1);
		371
		372	return 0;
		373	}
		374
		375	void
		376	coro_transfer (coro_context prev, coro_context next)
		377	{
		378	pthread_cond_signal (&next->cv);
		379	pthread_cond_wait (&prev->cv, &coro_mutex);
		380	#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
		381	pthread_testcancel ();
302	#endif	382	#endif
		383	}
303		384
304	# elif CORO_LINUX	385	void
305		386	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
306	_setjmp (ctx->env);	387	{
307	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
308	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
309	ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
310	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
311	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
312	ctx->env[0].__jmpbuf[0].__sp = (int )((char )sptr + ssize) - sizeof (long);
313	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
314	ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
315	ctx->env[0].__jmpbuf[0].__sp = (void )((char )sptr + ssize) - sizeof (long);
316	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
317	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
318	ctx->env[0].__jmpbuf[0].__sp = (void )((char )sptr + ssize) - sizeof (long);
319	#else
320	# error "linux libc or architecture not supported"
321	#endif
322
323	# elif CORO_IRIX
324
325	setjmp (ctx->env);
326	ctx->env[JB_PC] = (__uint64_t)coro_init;
327	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
328
329	# elif CORO_ASM
330
331	ctx->sp = (volatile void *)(ssize + (char )sptr);
332	ctx->sp -= NUM_ALIGN;
333	--ctx->sp = (void )coro_init;
334	ctx->sp -= NUM_SAVED;
335
336	# endif
337
338	coro_transfer ((coro_context )create_coro, (coro_context )new_coro);
339
340	# elif CORO_PTHREAD
341
342	pthread_t id;
343	pthread_attr_t attr;
344	coro_context nctx;	388	static coro_context nctx;
345	struct coro_init_args args;
346	static int once;	389	static int once;
347		390
348	if (!once)	391	if (!once)
349	{	392	{
		393	once = 1;
		394
350	pthread_mutex_lock (&coro_mutex);	395	pthread_mutex_lock (&coro_mutex);
351	once = 1;	396	pthread_cond_init (&nctx.cv, 0);
		397	null_tid = pthread_self ();
352	}	398	}
353		399
		400	pthread_cond_init (&ctx->cv, 0);
		401
		402	if (coro)
		403	{
		404	pthread_attr_t attr;
		405	struct coro_init_args args;
		406
354	args.func = coro;	407	args.func = coro;
355	args.arg = arg;	408	args.arg = arg;
356	args.self = ctx;	409	args.self = ctx;
357	args.main = &nctx;	410	args.main = &nctx;
358		411
359	pthread_attr_init (&attr);	412	pthread_attr_init (&attr);
360	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	413	#if __UCLIBC__
		414	/* exists, but is borked */
		415	/pthread_attr_setstacksize (&attr, (size_t)ssize);/
		416	#else
361	pthread_attr_setstack (&attr, sptr, (size_t)ssize);	417	pthread_attr_setstack (&attr, sptr, (size_t)ssize);
		418	#endif
		419	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
362	pthread_create (&id, &attr, trampoline, &args);	420	pthread_create (&ctx->id, &attr, coro_init, &args);
363		421
364	pthread_cond_init (&args.self->c, 0);
365	coro_transfer (args.main, args.self);	422	coro_transfer (args.main, args.self);
		423	}
		424	else
		425	ctx->id = null_tid;
		426	}
		427
		428	void
		429	coro_destroy (coro_context *ctx)
		430	{
		431	if (!pthread_equal (ctx->id, null_tid))
		432	{
		433	pthread_cancel (ctx->id);
		434	pthread_mutex_unlock (&coro_mutex);
		435	pthread_join (ctx->id, 0);
		436	pthread_mutex_lock (&coro_mutex);
		437	}
		438
		439	pthread_cond_destroy (&ctx->cv);
		440	}
366		441
367	#else	442	#else
368	# error unsupported backend	443	# error unsupported backend
369	#endif	444	#endif
370	}
371		445

Diff Legend

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

Comparing libcoro/coro.c (file contents): Revision 1.36 by root, Wed Nov 5 01:54:34 2008 UTC vs. Revision 1.56 by root, Mon May 30 02:32:06 2011 UTC

Diff Legend

Comparing libcoro/coro.c (file contents):
Revision 1.36 by root, Wed Nov 5 01:54:34 2008 UTC vs.
Revision 1.56 by root, Mon May 30 02:32:06 2011 UTC