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

Comparing libcoro/coro.c (file contents):
Revision 1.35 by root, Mon Nov 3 16:05:38 2008 UTC vs.
Revision 1.61 by root, Sun Jul 3 10:51:42 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 __GCC_HAVE_DWARF2_CFI_ASM && __amd64
		92	asm (".cfi_undefined rip");
		93	#endif
91		94
92	func ((void *)arg);	95	func ((void *)arg);
93		96
94	/* the new coro returned. bad. just abort() for now */	97	/* the new coro returned. bad. just abort() for now */
95	abort ();	98	abort ();
96	}	99	}
97		100
98	# if CORO_SJLJ	101	# if CORO_SJLJ
99		102
100	static volatile int trampoline_count;	103	static volatile int trampoline_done;
101		104
102	/* trampoline signal handler */	105	/* trampoline signal handler */
103	static void	106	static void
104	trampoline (int sig)	107	trampoline (int sig)
105	{	108	{
106	if (setjmp (((coro_context *)new_coro)->env))	109	if (coro_setjmp (new_coro->env))
107	{
108	#if HAVE_CFI
109	asm (".cfi_startproc");
110	#endif
111	coro_init (); /* start it */	110	coro_init (); /* start it */
112	#if HAVE_CFI
113	asm (".cfi_endproc");
114	#endif
115	}
116	else	111	else
117	trampoline_count++;	112	trampoline_done = 1;
118	}	113	}
119		114
120	# endif
121
122	#endif	115	# endif
123		116
124	#if CORO_ASM	117	# if CORO_ASM
		118
		119	#if _WIN32
		120	#define CORO_WIN_TIB 1
		121	#endif
		122
125	asm (	123	asm (
126	".text\n"	124	"\t.text\n"
127	".globl coro_transfer\n"	125	"\t.globl coro_transfer\n"
128	".type coro_transfer, @function\n"
129	"coro_transfer:\n"	126	"coro_transfer:\n"
		127	/* windows, of course, gives a shit on the amd64 ABI and uses different registers */
		128	/* http://blogs.msdn.com/freik/archive/2005/03/17/398200.aspx */
130	#if __amd64	129	#if __amd64
131	# define NUM_SAVED 5	130	#ifdef WIN32
		131	/* TODO: xmm6..15 also would need to be saved. sigh. */
		132	#define NUM_SAVED 8
		133	"\tpushq %rsi\n"
		134	"\tpushq %rdi\n"
		135	"\tpushq %rbp\n"
132	"\tpush %rbx\n"	136	"\tpushq %rbx\n"
133	"\tpush %r12\n"	137	"\tpushq %r12\n"
134	"\tpush %r13\n"	138	"\tpushq %r13\n"
135	"\tpush %r14\n"	139	"\tpushq %r14\n"
136	"\tpush %r15\n"	140	"\tpushq %r15\n"
		141	#if CORO_WIN_TIB
		142	"\tpushq %fs:0x0\n"
		143	"\tpushq %fs:0x8\n"
		144	"\tpushq %fs:0xc\n"
		145	#endif
		146	"\tmovq %rsp, (%rcx)\n"
		147	"\tmovq (%rdx), %rsp\n"
		148	#if CORO_WIN_TIB
		149	"\tpopq %fs:0xc\n"
		150	"\tpopq %fs:0x8\n"
		151	"\tpopq %fs:0x0\n"
		152	#endif
		153	"\tpopq %r15\n"
		154	"\tpopq %r14\n"
		155	"\tpopq %r13\n"
		156	"\tpopq %r12\n"
		157	"\tpopq %rbx\n"
		158	"\tpopq %rbp\n"
		159	"\tpopq %rdi\n"
		160	"\tpopq %rsi\n"
		161	#else
		162	#define NUM_SAVED 6
		163	"\tpushq %rbp\n"
		164	"\tpushq %rbx\n"
		165	"\tpushq %r12\n"
		166	"\tpushq %r13\n"
		167	"\tpushq %r14\n"
		168	"\tpushq %r15\n"
137	"\tmov %rsp, (%rdi)\n"	169	"\tmovq %rsp, (%rdi)\n"
138	"\tmov (%rsi), %rsp\n"	170	"\tmovq (%rsi), %rsp\n"
139	"\tpop %r15\n"	171	"\tpopq %r15\n"
140	"\tpop %r14\n"	172	"\tpopq %r14\n"
141	"\tpop %r13\n"	173	"\tpopq %r13\n"
142	"\tpop %r12\n"	174	"\tpopq %r12\n"
143	"\tpop %rbx\n"	175	"\tpopq %rbx\n"
		176	"\tpopq %rbp\n"
		177	#endif
144	#elif __i386	178	#elif __i386
145	# define NUM_SAVED 4	179	#define NUM_SAVED 4
146	"\tpush %ebx\n"
147	"\tpush %esi\n"
148	"\tpush %edi\n"
149	"\tpush %ebp\n"	180	"\tpushl %ebp\n"
		181	"\tpushl %ebx\n"
		182	"\tpushl %esi\n"
		183	"\tpushl %edi\n"
		184	#if CORO_WIN_TIB
		185	"\tpushl %fs:0\n"
		186	"\tpushl %fs:4\n"
		187	"\tpushl %fs:8\n"
		188	#endif
150	"\tmov %esp, (%eax)\n"	189	"\tmovl %esp, (%eax)\n"
151	"\tmov (%edx), %esp\n"	190	"\tmovl (%edx), %esp\n"
152	"\tpop %ebp\n"	191	#if CORO_WIN_TIB
		192	"\tpopl %fs:8\n"
		193	"\tpopl %fs:4\n"
		194	"\tpopl %fs:0\n"
		195	#endif
153	"\tpop %edi\n"	196	"\tpopl %edi\n"
154	"\tpop %esi\n"	197	"\tpopl %esi\n"
155	"\tpop %ebx\n"	198	"\tpopl %ebx\n"
156	#else	199	"\tpopl %ebp\n"
		200	#else
157	# error unsupported architecture	201	#error unsupported architecture
158	#endif	202	#endif
159	"\tret\n"	203	"\tret\n"
160	);	204	);
		205
161	#endif	206	# endif
162		207
163	#if CORO_PTHREAD	208	void
164		209	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
165	struct coro_init_args {
166	coro_func func;
167	void *arg;
168	coro_context self, main;
169	};
170
171	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
172
173	static void *
174	trampoline (void *args_)
175	{	210	{
176	struct coro_init_args args = (struct coro_init_args )args_;	211	coro_context nctx;
177	coro_func func = args->func;
178	void *arg = args->arg;
179
180	pthread_mutex_lock (&coro_mutex);
181	pthread_cond_destroy (&args->self->c);
182	coro_transfer (args->self, args->main);
183	func (arg);
184	pthread_mutex_unlock (&coro_mutex);
185
186	return 0;
187	}
188
189	asm("");
190
191	void coro_transfer(coro_context prev, coro_context next)
192	{
193	pthread_cond_init (&prev->c, 0);
194	pthread_cond_signal (&next->c);
195	pthread_cond_wait (&prev->c, &coro_mutex);
196	pthread_cond_destroy (&prev->c);
197	}
198
199	#endif
200
201	/* initialize a machine state */
202	void coro_create (coro_context *ctx,
203	coro_func coro, void *arg,
204	void *sptr, long ssize)
205	{
206	#if CORO_UCONTEXT
207
208	getcontext (&(ctx->uc));
209
210	ctx->uc.uc_link = 0;
211	ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize);
212	ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize);
213	ctx->uc.uc_stack.ss_flags = 0;
214
215	makecontext (&(ctx->uc), (void (*)()) coro, 1, arg);
216
217	#elif CORO_SJLJ \|\| CORO_LOSER \|\| CORO_LINUX \|\| CORO_IRIX \|\| CORO_ASM
218
219	# if CORO_SJLJ	212	# if CORO_SJLJ
220	stack_t ostk, nstk;	213	stack_t ostk, nstk;
221	struct sigaction osa, nsa;	214	struct sigaction osa, nsa;
222	sigset_t nsig, osig;	215	sigset_t nsig, osig;
223	# endif	216	# endif
224	coro_context nctx;	217
		218	if (!coro)
		219	return;
225		220
226	coro_init_func = coro;	221	coro_init_func = coro;
227	coro_init_arg = arg;	222	coro_init_arg = arg;
228		223
229	new_coro = ctx;	224	new_coro = ctx;
…		…
245	perror ("sigaction");	240	perror ("sigaction");
246	abort ();	241	abort ();
247	}	242	}
248		243
249	/* set the new stack */	244	/* set the new stack */
250	nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */	245	nstk.ss_sp = STACK_ADJUST_PTR (sptr, ssize); /* yes, some platforms (IRIX) get this wrong. */
251	nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize);	246	nstk.ss_size = STACK_ADJUST_SIZE (sptr, ssize);
252	nstk.ss_flags = 0;	247	nstk.ss_flags = 0;
253		248
254	if (sigaltstack (&nstk, &ostk) < 0)	249	if (sigaltstack (&nstk, &ostk) < 0)
255	{	250	{
256	perror ("sigaltstack");	251	perror ("sigaltstack");
257	abort ();	252	abort ();
258	}	253	}
259		254
260	trampoline_count = 0;	255	trampoline_done = 0;
261	kill (getpid (), SIGUSR2);	256	kill (getpid (), SIGUSR2);
262	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);	257	sigfillset (&nsig); sigdelset (&nsig, SIGUSR2);
263		258
264	while (!trampoline_count)	259	while (!trampoline_done)
265	sigsuspend (&nsig);	260	sigsuspend (&nsig);
266		261
267	sigaltstack (0, &nstk);	262	sigaltstack (0, &nstk);
268	nstk.ss_flags = SS_DISABLE;	263	nstk.ss_flags = SS_DISABLE;
269	if (sigaltstack (&nstk, 0) < 0)	264	if (sigaltstack (&nstk, 0) < 0)
…		…
275		270
276	if (~ostk.ss_flags & SS_DISABLE)	271	if (~ostk.ss_flags & SS_DISABLE)
277	sigaltstack (&ostk, 0);	272	sigaltstack (&ostk, 0);
278		273
279	sigaction (SIGUSR2, &osa, 0);	274	sigaction (SIGUSR2, &osa, 0);
280
281	sigprocmask (SIG_SETMASK, &osig, 0);	275	sigprocmask (SIG_SETMASK, &osig, 0);
282		276
283	# elif CORO_LOSER	277	# elif CORO_LOSER
284		278
285	setjmp (ctx->env);	279	coro_setjmp (ctx->env);
286	#if __CYGWIN__	280	#if __CYGWIN__ && __i386
287	ctx->env[7] = (long)((char *)sptr + ssize);	281	ctx->env[8] = (long) coro_init;
288	ctx->env[8] = (long)coro_init;	282	ctx->env[7] = (long) ((char *)sptr + ssize) - sizeof (long);
		283	#elif __CYGWIN__ && __x86_64
		284	ctx->env[7] = (long) coro_init;
		285	ctx->env[6] = (long) ((char *)sptr + ssize) - sizeof (long);
		286	#elif defined(__MINGW32__)
		287	ctx->env[5] = (long) coro_init;
		288	ctx->env[4] = (long) ((char *)sptr + ssize) - sizeof (long);
289	#elif defined(_M_IX86)	289	#elif defined(_M_IX86)
290	((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init;	290	((_JUMP_BUFFER *)&ctx->env)->Eip = (long) coro_init;
291	((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize);	291	((_JUMP_BUFFER *)&ctx->env)->Esp = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
292	#elif defined(_M_AMD64)	292	#elif defined(_M_AMD64)
293	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init;	293	((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64) coro_init;
294	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize);	294	((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
295	#elif defined(_M_IA64)	295	#elif defined(_M_IA64)
296	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init;	296	((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64) coro_init;
297	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize);	297	((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64) STACK_ADJUST_PTR (sptr, ssize) - sizeof (__int64);
298	#else	298	#else
299	# error "microsoft libc or architecture not supported"	299	#error "microsoft libc or architecture not supported"
		300	#endif
		301
		302	# elif CORO_LINUX
		303
		304	coro_setjmp (ctx->env);
		305	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
		306	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		307	ctx->env[0].__jmpbuf[JB_SP] = (long) STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		308	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
		309	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
		310	ctx->env[0].__jmpbuf[0].__sp = (int ) ((char )sptr + ssize) - sizeof (long);
		311	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
		312	ctx->env[0].__jmpbuf[0].__pc = (char *) coro_init;
		313	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		314	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
		315	ctx->env[0].__jmpbuf[JB_PC] = (long) coro_init;
		316	ctx->env[0].__jmpbuf[0].__sp = (void ) ((char )sptr + ssize) - sizeof (long);
		317	#else
		318	#error "linux libc or architecture not supported"
		319	#endif
		320
		321	# elif CORO_IRIX
		322
		323	coro_setjmp (ctx->env, 0);
		324	ctx->env[JB_PC] = (__uint64_t)coro_init;
		325	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long);
		326
		327	# elif CORO_ASM
		328
		329	ctx->sp = (void *)(ssize + (char )sptr);
		330	--ctx->sp = (void )abort; /* needed for alignment only */
		331	--ctx->sp = (void )coro_init;
		332
		333	#if CORO_WIN_TIB
		334	--ctx->sp = 0; / ExceptionList */
		335	--ctx->sp = (char )sptr + ssize; /* StackBase */
		336	--ctx->sp = sptr; / StackLimit */
		337	#endif
		338
		339	ctx->sp -= NUM_SAVED;
		340	memset (ctx->sp, 0, sizeof (ctx->sp) NUM_SAVED);
		341
		342	# elif CORO_UCONTEXT
		343
		344	getcontext (&(ctx->uc));
		345
		346	ctx->uc.uc_link = 0;
		347	ctx->uc.uc_stack.ss_sp = sptr;
		348	ctx->uc.uc_stack.ss_size = (size_t)ssize;
		349	ctx->uc.uc_stack.ss_flags = 0;
		350
		351	makecontext (&(ctx->uc), (void (*)())coro_init, 0);
		352
		353	# endif
		354
		355	coro_transfer (create_coro, new_coro);
		356	}
		357
		358	/*****************************************************************************/
		359	/* pthread backend */
		360	/*****************************************************************************/
		361	#elif CORO_PTHREAD
		362
		363	/* this mutex will be locked by the running coroutine */
		364	pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER;
		365
		366	struct coro_init_args
		367	{
		368	coro_func func;
		369	void *arg;
		370	coro_context self, main;
		371	};
		372
		373	static pthread_t null_tid;
		374
		375	/* I'd so love to cast pthread_mutex_unlock to void ()(void )... */
		376	static void
		377	mutex_unlock_wrapper (void *arg)
		378	{
		379	pthread_mutex_unlock ((pthread_mutex_t *)arg);
		380	}
		381
		382	static void *
		383	coro_init (void *args_)
		384	{
		385	struct coro_init_args args = (struct coro_init_args )args_;
		386	coro_func func = args->func;
		387	void *arg = args->arg;
		388
		389	pthread_mutex_lock (&coro_mutex);
		390
		391	/* we try to be good citizens and use deferred cancellation and cleanup handlers */
		392	pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex);
		393	coro_transfer (args->self, args->main);
		394	func (arg);
		395	pthread_cleanup_pop (1);
		396
		397	return 0;
		398	}
		399
		400	void
		401	coro_transfer (coro_context prev, coro_context next)
		402	{
		403	pthread_cond_signal (&next->cv);
		404	pthread_cond_wait (&prev->cv, &coro_mutex);
		405	#if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */
		406	pthread_testcancel ();
300	#endif	407	#endif
		408	}
301		409
302	# elif CORO_LINUX	410	void
303		411	coro_create (coro_context ctx, coro_func coro, void arg, void *sptr, long ssize)
304	_setjmp (ctx->env);	412	{
305	#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP)
306	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
307	ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize);
308	#elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__)
309	ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init;
310	ctx->env[0].__jmpbuf[0].__sp = (int )((char )sptr + ssize);
311	#elif defined (__GNU_LIBRARY__) && defined (__i386__)
312	ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init;
313	ctx->env[0].__jmpbuf[0].__sp = (void )((char )sptr + ssize);
314	#elif defined (__GNU_LIBRARY__) && defined (__amd64__)
315	ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init;
316	ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize);
317	#else
318	# error "linux libc or architecture not supported"
319	#endif
320
321	# elif CORO_IRIX
322
323	setjmp (ctx->env);
324	ctx->env[JB_PC] = (__uint64_t)coro_init;
325	ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize);
326
327	# elif CORO_ASM
328
329	ctx->sp = (volatile void *)(ssize + (char )sptr);
330	/* we try to allow for both functions with and without frame pointers */
331	--ctx->sp = (void )coro_init;
332	{
333	int i;
334	for (i = NUM_SAVED; i--; )
335	*--ctx->sp = 0;
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;	413	static coro_context nctx;
347	struct coro_init_args args;
348	static int once;	414	static int once;
349		415
350	if (!once)	416	if (!once)
351	{	417	{
		418	once = 1;
		419
352	pthread_mutex_lock (&coro_mutex);	420	pthread_mutex_lock (&coro_mutex);
353	once = 1;	421	pthread_cond_init (&nctx.cv, 0);
		422	null_tid = pthread_self ();
354	}	423	}
355		424
		425	pthread_cond_init (&ctx->cv, 0);
		426
		427	if (coro)
		428	{
		429	pthread_attr_t attr;
		430	struct coro_init_args args;
		431
356	args.func = coro;	432	args.func = coro;
357	args.arg = arg;	433	args.arg = arg;
358	args.self = ctx;	434	args.self = ctx;
359	args.main = &nctx;	435	args.main = &nctx;
360		436
361	pthread_attr_init (&attr);	437	pthread_attr_init (&attr);
362	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	438	#if __UCLIBC__
		439	/* exists, but is borked */
		440	/pthread_attr_setstacksize (&attr, (size_t)ssize);/
		441	#else
363	pthread_attr_setstack (&attr, sptr, (size_t)ssize);	442	pthread_attr_setstack (&attr, sptr, (size_t)ssize);
		443	#endif
		444	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
364	pthread_create (&id, &attr, trampoline, &args);	445	pthread_create (&ctx->id, &attr, coro_init, &args);
365		446
366	pthread_cond_init (&args.self->c, 0);
367	coro_transfer (args.main, args.self);	447	coro_transfer (args.main, args.self);
		448	}
		449	else
		450	ctx->id = null_tid;
		451	}
		452
		453	void
		454	coro_destroy (coro_context *ctx)
		455	{
		456	if (!pthread_equal (ctx->id, null_tid))
		457	{
		458	pthread_cancel (ctx->id);
		459	pthread_mutex_unlock (&coro_mutex);
		460	pthread_join (ctx->id, 0);
		461	pthread_mutex_lock (&coro_mutex);
		462	}
		463
		464	pthread_cond_destroy (&ctx->cv);
		465	}
368		466
369	#else	467	#else
370	# error unsupported backend	468	# error unsupported backend
371	#endif	469	#endif
372	}
373		470

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Comparing libcoro/coro.c (file contents): Revision 1.35 by root, Mon Nov 3 16:05:38 2008 UTC vs. Revision 1.61 by root, Sun Jul 3 10:51:42 2011 UTC

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Comparing libcoro/coro.c (file contents):
Revision 1.35 by root, Mon Nov 3 16:05:38 2008 UTC vs.
Revision 1.61 by root, Sun Jul 3 10:51:42 2011 UTC