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

Comparing libcoro/coro.c (file contents):
Revision 1.34 by root, Mon Nov 3 15:25:12 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
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	#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
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
125	void __attribute__((__noinline__, __regparm__(2)))	119
126	coro_transfer (struct coro_context prev, struct coro_context next)	120	#if _WIN32
127	{	121	#define CORO_WIN_TIB 1
128	asm volatile (	122	#endif
		123
		124	asm (
		125	"\t.text\n"
		126	"\t.globl 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 */
129	#if __amd64	130	#if __amd64
130	# define NUM_SAVED 5	131	#ifdef WIN32
131	"push %%rbx\n\t"	132	/* TODO: xmm6..15 also would need to be saved. sigh. */
132	"push %%r12\n\t"	133	#define NUM_SAVED 8
133	"push %%r13\n\t"	134	"\tpushq %rsi\n"
134	"push %%r14\n\t"	135	"\tpushq %rdi\n"
135	"push %%r15\n\t"	136	"\tpushq %rbp\n"
136	"mov %%rsp, %0\n\t"	137	"\tpushq %rbx\n"
137	"mov %1, %%rsp\n\t"	138	"\tpushq %r12\n"
138	"pop %%r15\n\t"	139	"\tpushq %r13\n"
139	"pop %%r14\n\t"	140	"\tpushq %r14\n"
140	"pop %%r13\n\t"	141	"\tpushq %r15\n"
141	"pop %%r12\n\t"	142	#if CORO_WIN_TIB
142	"pop %%rbx\n\t"	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"
		170	"\tmovq %rsp, (%rdi)\n"
		171	"\tmovq (%rsi), %rsp\n"
		172	"\tpopq %r15\n"
		173	"\tpopq %r14\n"
		174	"\tpopq %r13\n"
		175	"\tpopq %r12\n"
		176	"\tpopq %rbx\n"
		177	"\tpopq %rbp\n"
		178	#endif
143	#elif __i386	179	#elif __i386
144	# define NUM_SAVED 4	180	#define NUM_SAVED 4
145	"push %%ebx\n\t"	181	"\tpushl %ebp\n"
146	"push %%esi\n\t"	182	"\tpushl %ebx\n"
147	"push %%edi\n\t"	183	"\tpushl %esi\n"
148	"push %%ebp\n\t"	184	"\tpushl %edi\n"
149	"mov %%esp, %0\n\t"	185	#if CORO_WIN_TIB
150	"mov %1, %%esp\n\t"	186	"\tpushl %fs:0\n"
151	"pop %%ebp\n\t"	187	"\tpushl %fs:4\n"
152	"pop %%edi\n\t"	188	"\tpushl %fs:8\n"
153	"pop %%esi\n\t"	189	#endif
154	"pop %%ebx\n\t"	190	"\tmovl %esp, (%eax)\n"
155	#else	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
		197	"\tpopl %edi\n"
		198	"\tpopl %esi\n"
		199	"\tpopl %ebx\n"
		200	"\tpopl %ebp\n"
		201	#else
156	# error unsupported architecture	202	#error unsupported architecture
157	#endif	203	#endif
158	: "=m" (prev->sp)	204	"\tret\n"
159	: "m" (next->sp)
160	);	205	);
161	}	206
162	#endif	207	# endif
163		208
164	#if CORO_PTHREAD	209	void
165		210	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
166	struct coro_init_args {
167	coro_func func;
168	void *arg;
169	coro_context self, main;
170	};
171
172	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
173
174	static void *
175	trampoline (void *args_)
176	{	211	{
177	struct coro_init_args args = (struct coro_init_args )args_;	212	coro_context nctx;
178	coro_func func = args->func;
179	void *arg = args->arg;
180
181	pthread_mutex_lock (&coro_mutex);
182	pthread_cond_destroy (&args->self->c);
183	coro_transfer (args->self, args->main);
184	func (arg);
185	pthread_mutex_unlock (&coro_mutex);
186
187	return 0;
188	}
189
190	void coro_transfer(coro_context prev, coro_context next)
191	{
192	pthread_cond_init (&prev->c, 0);
193	pthread_cond_signal (&next->c);
194	pthread_cond_wait (&prev->c, &coro_mutex);
195	pthread_cond_destroy (&prev->c);
196	}
197
198	#endif
199
200	/* initialize a machine state */
201	void coro_create (coro_context *ctx,
202	coro_func coro, void *arg,
203	void *sptr, long ssize)
204	{
205	#if CORO_UCONTEXT
206
207	getcontext (&(ctx->uc));
208
209	ctx->uc.uc_link = 0;
210	ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
211	ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
212	ctx->uc.uc_stack.ss_flags = 0;
213
214	makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
215
216	#elif CORO_SJLJ \|\| CORO_LOSER \|\| CORO_LINUX \|\| CORO_IRIX \|\| CORO_ASM
217
218	# if CORO_SJLJ	213	# if CORO_SJLJ
219	stack_t ostk, nstk;	214	stack_t ostk, nstk;
220	struct sigaction osa, nsa;	215	struct sigaction osa, nsa;
221	sigset_t nsig, osig;	216	sigset_t nsig, osig;
222	# endif	217	# endif
223	coro_context nctx;	218
		219	if (!coro)
		220	return;
224		221
225	coro_init_func = coro;	222	coro_init_func = coro;
226	coro_init_arg = arg;	223	coro_init_arg = arg;
227		224
228	new_coro = ctx;	225	new_coro = ctx;
…		…
244	perror ("sigaction");	241	perror ("sigaction");
245	abort ();	242	abort ();
246	}	243	}
247		244
248	/* set the new stack */	245	/* set the new stack */
249	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. */
250	nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);	247	nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
251	nstk.ss_flags = 0;	248	nstk.ss_flags = 0;
252		249
253	if (sigaltstack (&nstk, &ostk) < 0)	250	if (sigaltstack (&nstk, &ostk) < 0)
254	{	251	{
255	perror ("sigaltstack");	252	perror ("sigaltstack");
256	abort ();	253	abort ();
257	}	254	}
258		255
259	trampoline_count = 0;	256	trampoline_done = 0;
260	kill (getpid (), SIGUSR2);	257	kill (getpid (), SIGUSR2);
261	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);	258	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
262		259
263	while (!trampoline_count)	260	while (!trampoline_done)
264	sigsuspend (&nsig);	261	sigsuspend (&nsig);
265		262
266	sigaltstack (0, &nstk);	263	sigaltstack (0, &nstk);
267	nstk.ss_flags = SS_DISABLE;	264	nstk.ss_flags = SS_DISABLE;
268	if (sigaltstack (&nstk, 0) < 0)	265	if (sigaltstack (&nstk, 0) < 0)
…		…
274		271
275	if (~ostk.ss_flags & SS_DISABLE)	272	if (~ostk.ss_flags & SS_DISABLE)
276	sigaltstack (&ostk, 0);	273	sigaltstack (&ostk, 0);
277		274
278	sigaction (SIGUSR2, &osa, 0);	275	sigaction (SIGUSR2, &osa, 0);
279
280	sigprocmask (SIG_SETMASK, &osig, 0);	276	sigprocmask (SIG_SETMASK, &osig, 0);
281		277
282	# elif CORO_LOSER	278	# elif CORO_LOSER
283		279
284	setjmp (ctx->env);	280	coro_setjmp (ctx->env);
285	#if __CYGWIN__	281	#if __CYGWIN__ && __i386
286	ctx->env[7] = (long)((char *)sptr + ssize);	282	ctx->env[8] = (long) coro_init;
287	ctx->env[8] = (long)coro_init;	283	ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
		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);
288	#elif defined(_M_IX86)	290	#elif defined(_M_IX86)
289	((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;	291	((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
290	((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize);	292	((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
291	#elif defined(_M_AMD64)	293	#elif defined(_M_AMD64)
292	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;	294	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
293	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize);	295	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
294	#elif defined(_M_IA64)	296	#elif defined(_M_IA64)
295	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;	297	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
296	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize);	298	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
297	#else	299	#else
298	# error "microsoft libc or architecture not supported"	300	#error "microsoft libc or architecture not supported"
		301	#endif
		302
		303	# elif CORO_LINUX
		304
		305	coro_setjmp (ctx->env);
		306	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
		307	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		308	ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		309	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
		310	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
		311	ctx->env[0].__jmpbuf[0].__sp = (int ) ((char )sptr + ssize) - sizeof (long);
		312	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
		313	ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
		314	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		315	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
		316	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		317	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		318	#else
		319	#error "linux libc or architecture not supported"
		320	#endif
		321
		322	# elif CORO_IRIX
		323
		324	coro_setjmp (ctx->env, 0);
		325	ctx->env[JB_PC] = (__uint64_t)coro_init;
		326	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		327
		328	# elif CORO_ASM
		329
		330	ctx->sp = (void *)(ssize + (char )sptr);
		331	--ctx->sp = (void )abort; /* needed for alignment only */
		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
		340	ctx->sp -= NUM_SAVED;
		341	memset (ctx->sp, 0, sizeof (ctx->sp) NUM_SAVED);
		342
		343	# elif CORO_UCONTEXT
		344
		345	getcontext (&(ctx->uc));
		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	/*****************************************************************************/
		362	#elif CORO_PTHREAD
		363
		364	/* this mutex will be locked by the running coroutine */
		365	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
		366
		367	struct coro_init_args
		368	{
		369	coro_func func;
		370	void *arg;
		371	coro_context self, main;
		372	};
		373
		374	static pthread_t null_tid;
		375
		376	/* I'd so love to cast pthread_mutex_unlock to void ()(void )... */
		377	static void
		378	mutex_unlock_wrapper (void *arg)
		379	{
		380	pthread_mutex_unlock ((pthread_mutex_t *)arg);
		381	}
		382
		383	static void *
		384	coro_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
		401	void
		402	coro_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 ();
299	#endif	408	#endif
		409	}
300		410
301	# elif CORO_LINUX	411	void
302		412	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
303	_setjmp (ctx->env);	413	{
304	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
305	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
306	ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
307	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
308	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
309	ctx->env[0].__jmpbuf[0].__sp = (int )((char )sptr + ssize);
310	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
311	ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
312	ctx->env[0].__jmpbuf[0].__sp = (void )((char )sptr + ssize);
313	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
314	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
315	ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
316	#else
317	# error "linux libc or architecture not supported"
318	#endif
319
320	# elif CORO_IRIX
321
322	setjmp (ctx->env);
323	ctx->env[JB_PC] = (__uint64_t)coro_init;
324	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
325
326	# elif CORO_ASM
327
328	ctx->sp = (volatile void *)(ssize + (char )sptr);
329	/* we try to allow for both functions with and without frame pointers */
330	--ctx->sp = (void )coro_init;
331	{
332	void *frame = ctx->sp - 1;
333	int i;
334	for (i = NUM_SAVED; i--; )
335	*--ctx->sp = frame;
336	}
337
338	# endif
339
340	coro_transfer ((coro_context )create_coro, (coro_context )new_coro);
341
342	# elif CORO_PTHREAD
343
344	pthread_t id;
345	pthread_attr_t attr;
346	coro_context nctx;	414	static coro_context nctx;
347	struct coro_init_args args;
348	static int once;	415	static int once;
349		416
350	if (!once)	417	if (!once)
351	{	418	{
		419	once = 1;
		420
352	pthread_mutex_lock (&coro_mutex);	421	pthread_mutex_lock (&coro_mutex);
353	once = 1;	422	pthread_cond_init (&nctx.cv, 0);
		423	null_tid = pthread_self ();
354	}	424	}
355		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
356	args.func = coro;	433	args.func = coro;
357	args.arg = arg;	434	args.arg = arg;
358	args.self = ctx;	435	args.self = ctx;
359	args.main = &nctx;	436	args.main = &nctx;
360		437
361	pthread_attr_init (&attr);	438	pthread_attr_init (&attr);
362	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
363	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);
364	pthread_create (&id, &attr, trampoline, &args);	446	pthread_create (&ctx->id, &attr, coro_init, &args);
365		447
366	pthread_cond_init (&args.self->c, 0);
367	coro_transfer (args.main, args.self);	448	coro_transfer (args.main, args.self);
		449	}
		450	else
		451	ctx->id = null_tid;
		452	}
		453
		454	void
		455	coro_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	}
368		467
369	#else	468	#else
370	# error unsupported backend	469	# error unsupported backend
371	#endif	470	#endif
372	}
373		471

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Comparing libcoro/coro.c (file contents): Revision 1.34 by root, Mon Nov 3 15:25:12 2008 UTC vs. Revision 1.60 by root, Mon Jun 13 09:00:15 2011 UTC

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Comparing libcoro/coro.c (file contents):
Revision 1.34 by root, Mon Nov 3 15:25:12 2008 UTC vs.
Revision 1.60 by root, Mon Jun 13 09:00:15 2011 UTC