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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.92 by root, Wed Nov 8 01:59:59 2006 UTC vs.
Revision 1.103 by root, Sun Jul 8 09:09:34 2007 UTC

1	/* solaris */	1	#include "xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
		17
		18	#ifdef _WIN32
		19
		20	# define SIGIO 0
		21	typedef Direntry_t X_DIRENT;
		22	#undef malloc
		23	#undef free
		24
		25	// perl overrides all those nice win32 functions
		26	# undef open
		27	# undef read
		28	# undef write
		29	# undef stat
		30	# undef fstat
		31	# define lstat stat
		32	# undef truncate
		33	# undef ftruncate
		34	# undef open
		35	# undef close
		36	# undef unlink
		37	# undef rmdir
		38	# undef rename
		39	# undef lseek
		40
		41	# define chown(a,b,c) (errno = ENOSYS, -1)
		42	# define fchown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchmod(a,b) (errno = ENOSYS, -1)
		44	# define symlink(a,b) (errno = ENOSYS, -1)
		45	# define readlink(a,b,c) (errno = ENOSYS, -1)
		46	# define mknod(a,b,c) (errno = ENOSYS, -1)
		47	# define truncate(a,b) (errno = ENOSYS, -1)
		48	# define ftruncate(fd,o) chsize ((fd), (o))
		49	# define fsync(fd) _commit (fd)
		50	# define opendir(fd) (errno = ENOSYS, 0)
		51	# define readdir(fd) (errno = ENOSYS, -1)
		52	# define closedir(fd) (errno = ENOSYS, -1)
		53	# define mkdir(a,b) mkdir (a)
		54
		55	#else
		56
		57	# include "autoconf/config.h"
		58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	typedef struct dirent X_DIRENT;
		64
		65	#endif
32		66
33	#if HAVE_SENDFILE	67	#if HAVE_SENDFILE
34	# if __linux	68	# if __linux
35	# include <sys/sendfile.h>	69	# include <sys/sendfile.h>
36	# elif __freebsd	70	# elif __freebsd
…		…
51	/* used for struct dirent, AIX doesn't provide it */	85	/* used for struct dirent, AIX doesn't provide it */
52	#ifndef NAME_MAX	86	#ifndef NAME_MAX
53	# define NAME_MAX 4096	87	# define NAME_MAX 4096
54	#endif	88	#endif
55		89
56	#ifndef PTHREAD_STACK_MIN
57	/* care for broken platforms, e.g. windows */
58	# define PTHREAD_STACK_MIN 16384
59	#endif
60
61	#if __ia64
62	# define STACKSIZE 65536
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68
69	/* wether word reads are potentially non-atomic.
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif
79	#endif
80
81	/* buffer size for various temporary buffers */	90	/* buffer size for various temporary buffers */
82	#define AIO_BUFSIZE 65536	91	#define AIO_BUFSIZE 65536
83		92
		93	/* use NV for 32 bit perls as it allows larger offsets */
		94	#if IVSIZE >= 8
		95	# define SvVAL64 SvIV
		96	#else
		97	# define SvVAL64 SvNV
		98	#endif
		99
84	#define dBUF \	100	#define dBUF \
85	char *aio_buf; \	101	char *aio_buf; \
86	LOCK (wrklock); \	102	X_LOCK (wrklock); \
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	103	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \	104	X_UNLOCK (wrklock); \
89	if (!aio_buf) \	105	if (!aio_buf) \
90	return -1;	106	return -1;
91		107
92	typedef SV SV8; /* byte-sv, used for argument-checking */	108	typedef SV SV8; /* byte-sv, used for argument-checking */
93		109
94	enum {	110	enum {
95	REQ_QUIT,	111	REQ_QUIT,
96	REQ_OPEN, REQ_CLOSE,	112	REQ_OPEN, REQ_CLOSE,
97	REQ_READ, REQ_WRITE, REQ_READAHEAD,	113	REQ_READ, REQ_WRITE,
98	REQ_SENDFILE,	114	REQ_READAHEAD, REQ_SENDFILE,
99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	115	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		116	REQ_TRUNCATE, REQ_FTRUNCATE,
		117	REQ_UTIME, REQ_FUTIME,
		118	REQ_CHMOD, REQ_FCHMOD,
		119	REQ_CHOWN, REQ_FCHOWN,
100	REQ_FSYNC, REQ_FDATASYNC,	120	REQ_FSYNC, REQ_FDATASYNC,
101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	121	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
102	REQ_MKNOD, REQ_READDIR,	122	REQ_MKNOD, REQ_READDIR,
103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,	123	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104	REQ_GROUP, REQ_NOP,	124	REQ_GROUP, REQ_NOP,
105	REQ_BUSY,	125	REQ_BUSY,
106	};	126	};
…		…
110		130
111	typedef struct aio_cb	131	typedef struct aio_cb
112	{	132	{
113	struct aio_cb *volatile next;	133	struct aio_cb *volatile next;
114		134
115	SV *callback, *fh;	135	SV *callback;
116	SV *sv1, *sv2;	136	SV *sv1, *sv2;
117	void *ptr1, *ptr2;	137	void *ptr1, *ptr2;
118	off_t offs;	138	off_t offs;
119	size_t size;	139	size_t size;
120	ssize_t result;	140	ssize_t result;
		141	double nv1, nv2;
121		142
122	STRLEN stroffset;	143	STRLEN stroffset;
123	int type;	144	int type;
124	int int1, int2;	145	int int1, int2, int3;
125	int errorno;	146	int errorno;
126	mode_t mode; /* open */	147	mode_t mode; /* open */
127		148
128	unsigned char flags;	149	unsigned char flags;
129	unsigned char pri;	150	unsigned char pri;
…		…
132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	153	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
133	} aio_cb;	154	} aio_cb;
134		155
135	enum {	156	enum {
136	FLAG_CANCELLED = 0x01, /* request was cancelled */	157	FLAG_CANCELLED = 0x01, /* request was cancelled */
137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */	158	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */	159	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139	};	160	};
140		161
141	typedef aio_cb *aio_req;	162	typedef aio_cb *aio_req;
142	typedef aio_cb *aio_req_ornot;	163	typedef aio_cb *aio_req_ornot;
…		…
160	{	181	{
161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS	182	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);	183	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
163	}	184	}
164		185
		186	static thread_t main_tid;
		187	static int main_sig;
		188	static int block_sig_level;
		189
		190	void block_sig ()
		191	{
		192	sigset_t ss;
		193
		194	if (block_sig_level++)
		195	return;
		196
		197	if (!main_sig)
		198	return;
		199
		200	sigemptyset (&ss);
		201	sigaddset (&ss, main_sig);
		202	pthread_sigmask (SIG_BLOCK, &ss, 0);
		203	}
		204
		205	void unblock_sig ()
		206	{
		207	sigset_t ss;
		208
		209	if (--block_sig_level)
		210	return;
		211
		212	if (!main_sig)
		213	return;
		214
		215	sigemptyset (&ss);
		216	sigaddset (&ss, main_sig);
		217	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		218	}
		219
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;	220	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166		221
167	static unsigned int started, idle, wanted;	222	static unsigned int started, idle, wanted;
168		223
169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171	#else
172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173	#endif
174
175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178	/* worker threads management */	224	/* worker threads management */
179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;	225	static mutex_t wrklock = X_MUTEX_INIT;
180		226
181	typedef struct worker {	227	typedef struct worker {
182	/* locked by wrklock */	228	/* locked by wrklock */
183	struct worker *prev, *next;	229	struct worker *prev, *next;
184		230
185	pthread_t tid;	231	thread_t tid;
186		232
187	/* locked by reslock, reqlock or wrklock */	233	/* locked by reslock, reqlock or wrklock */
188	aio_req req; /* currently processed request */	234	aio_req req; /* currently processed request */
189	void *dbuf;	235	void *dbuf;
190	DIR *dirp;	236	DIR *dirp;
…		…
218	static volatile unsigned int nreqs, nready, npending;	264	static volatile unsigned int nreqs, nready, npending;
219	static volatile unsigned int max_idle = 4;	265	static volatile unsigned int max_idle = 4;
220	static volatile unsigned int max_outstanding = 0xffffffff;	266	static volatile unsigned int max_outstanding = 0xffffffff;
221	static int respipe [2];	267	static int respipe [2];
222		268
223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	269	static mutex_t reslock = X_MUTEX_INIT;
224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	270	static mutex_t reqlock = X_MUTEX_INIT;
225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	271	static cond_t reqwait = X_COND_INIT;
226		272
227	#if WORDACCESS_UNSAFE	273	#if WORDACCESS_UNSAFE
228		274
229	static unsigned int get_nready ()	275	static unsigned int get_nready ()
230	{	276	{
231	unsigned int retval;	277	unsigned int retval;
232		278
233	LOCK (reqlock);	279	X_LOCK (reqlock);
234	retval = nready;	280	retval = nready;
235	UNLOCK (reqlock);	281	X_UNLOCK (reqlock);
236		282
237	return retval;	283	return retval;
238	}	284	}
239		285
240	static unsigned int get_npending ()	286	static unsigned int get_npending ()
241	{	287	{
242	unsigned int retval;	288	unsigned int retval;
243		289
244	LOCK (reslock);	290	X_LOCK (reslock);
245	retval = npending;	291	retval = npending;
246	UNLOCK (reslock);	292	X_UNLOCK (reslock);
247		293
248	return retval;	294	return retval;
249	}	295	}
250		296
251	static unsigned int get_nthreads ()	297	static unsigned int get_nthreads ()
252	{	298	{
253	unsigned int retval;	299	unsigned int retval;
254		300
255	LOCK (wrklock);	301	X_LOCK (wrklock);
256	retval = started;	302	retval = started;
257	UNLOCK (wrklock);	303	X_UNLOCK (wrklock);
258		304
259	return retval;	305	return retval;
260	}	306	}
261		307
262	#else	308	#else
…		…
320		366
321	abort ();	367	abort ();
322	}	368	}
323		369
324	static int poll_cb ();	370	static int poll_cb ();
325	static void req_invoke (aio_req req);	371	static int req_invoke (aio_req req);
326	static void req_free (aio_req req);	372	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	373	static void req_cancel (aio_req req);
328		374
329	/* must be called at most once */	375	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	376	static SV *req_sv (aio_req req, const char *klass)
331	{	377	{
…		…
350	return mg ? (aio_req)mg->mg_ptr : 0;	396	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	397	}
352		398
353	static void aio_grp_feed (aio_req grp)	399	static void aio_grp_feed (aio_req grp)
354	{	400	{
		401	block_sig ();
		402
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	403	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
356	{	404	{
357	int old_len = grp->size;	405	int old_len = grp->size;
358		406
359	if (grp->sv2 && SvOK (grp->sv2))	407	if (grp->sv2 && SvOK (grp->sv2))
…		…
377	SvREFCNT_dec (grp->sv2);	425	SvREFCNT_dec (grp->sv2);
378	grp->sv2 = 0;	426	grp->sv2 = 0;
379	break;	427	break;
380	}	428	}
381	}	429	}
		430
		431	unblock_sig ();
382	}	432	}
383		433
384	static void aio_grp_dec (aio_req grp)	434	static void aio_grp_dec (aio_req grp)
385	{	435	{
386	--grp->size;	436	--grp->size;
…		…
389	aio_grp_feed (grp);	439	aio_grp_feed (grp);
390		440
391	/* finish, if done */	441	/* finish, if done */
392	if (!grp->size && grp->int1)	442	if (!grp->size && grp->int1)
393	{	443	{
		444	block_sig ();
		445
394	req_invoke (grp);	446	if (!req_invoke (grp))
		447	{
		448	req_destroy (grp);
		449	unblock_sig ();
		450	croak (0);
		451	}
		452
395	req_free (grp);	453	req_destroy (grp);
		454	unblock_sig ();
396	}	455	}
397	}	456	}
398		457
399	static void req_invoke (aio_req req)	458	static int req_invoke (aio_req req)
400	{	459	{
401	dSP;	460	dSP;
402		461
403	if (req->flags & FLAG_SV1_RO_OFF)	462	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	463	SvREADONLY_off (req->sv2);
405		464
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	465	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
407	{	466	{
408	ENTER;	467	ENTER;
409	SAVETMPS;	468	SAVETMPS;
…		…
447	PUSHs (sv_2mortal (newSViv (req->result)));	506	PUSHs (sv_2mortal (newSViv (req->result)));
448	PUTBACK;	507	PUTBACK;
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	508	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
450	SPAGAIN;	509	SPAGAIN;
451		510
452	fh = SvREFCNT_inc (POPs);	511	fh = POPs;
453
454	PUSHMARK (SP);	512	PUSHMARK (SP);
455	XPUSHs (sv_2mortal (fh));	513	XPUSHs (fh);
456	}	514	}
457	break;	515	break;
458		516
459	case REQ_GROUP:	517	case REQ_GROUP:
460	req->int1 = 2; /* mark group as finished */	518	req->int1 = 2; /* mark group as finished */
…		…
475	break;	533	break;
476		534
477	case REQ_READLINK:	535	case REQ_READLINK:
478	if (req->result > 0)	536	if (req->result > 0)
479	{	537	{
480	SvCUR_set (req->sv1, req->result);	538	SvCUR_set (req->sv2, req->result);
481	*SvEND (req->sv1) = 0;	539	*SvEND (req->sv2) = 0;
482	PUSHs (req->sv1);	540	PUSHs (req->sv2);
483	}	541	}
484	break;	542	break;
485		543
486	case REQ_STAT:	544	case REQ_STAT:
487	case REQ_LSTAT:	545	case REQ_LSTAT:
…		…
491	PL_statcache = *(Stat_t *)(req->ptr2);	549	PL_statcache = *(Stat_t *)(req->ptr2);
492	PUSHs (sv_2mortal (newSViv (req->result)));	550	PUSHs (sv_2mortal (newSViv (req->result)));
493	break;	551	break;
494		552
495	case REQ_READ:	553	case REQ_READ:
496	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	554	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
497	*SvEND (req->sv1) = 0;	555	*SvEND (req->sv2) = 0;
498	PUSHs (sv_2mortal (newSViv (req->result)));	556	PUSHs (sv_2mortal (newSViv (req->result)));
499	break;	557	break;
500		558
501	default:	559	default:
502	PUSHs (sv_2mortal (newSViv (req->result)));	560	PUSHs (sv_2mortal (newSViv (req->result)));
…		…
525	grp->grp_first = req->grp_next;	583	grp->grp_first = req->grp_next;
526		584
527	aio_grp_dec (grp);	585	aio_grp_dec (grp);
528	}	586	}
529		587
530	if (SvTRUE (ERRSV))	588	return !SvTRUE (ERRSV);
531	{
532	req_free (req);
533	croak (0);
534	}
535	}	589	}
536		590
537	static void req_free (aio_req req)	591	static void req_destroy (aio_req req)
538	{	592	{
539	if (req->self)	593	if (req->self)
540	{	594	{
541	sv_unmagic (req->self, PERL_MAGIC_ext);	595	sv_unmagic (req->self, PERL_MAGIC_ext);
542	SvREFCNT_dec (req->self);	596	SvREFCNT_dec (req->self);
543	}	597	}
544		598
545	SvREFCNT_dec (req->fh);
546	SvREFCNT_dec (req->sv1);	599	SvREFCNT_dec (req->sv1);
547	SvREFCNT_dec (req->sv2);	600	SvREFCNT_dec (req->sv2);
548	SvREFCNT_dec (req->callback);	601	SvREFCNT_dec (req->callback);
549		602
550	if (req->flags & FLAG_PTR2_FREE)	603	if (req->flags & FLAG_PTR2_FREE)
…		…
572	req->flags |= FLAG_CANCELLED;	625	req->flags |= FLAG_CANCELLED;
573		626
574	req_cancel_subs (req);	627	req_cancel_subs (req);
575	}	628	}
576		629
577	static void *aio_proc(void *arg);	630	X_THREAD_PROC (aio_proc);
578		631
579	static void start_thread (void)	632	static void start_thread (void)
580	{	633	{
581	sigset_t fullsigset, oldsigset;
582	pthread_attr_t attr;
583
584	worker *wrk = calloc (1, sizeof (worker));	634	worker *wrk = calloc (1, sizeof (worker));
585		635
586	if (!wrk)	636	if (!wrk)
587	croak ("unable to allocate worker thread data");	637	croak ("unable to allocate worker thread data");
588		638
589	pthread_attr_init (&attr);
590	pthread_attr_setstacksize (&attr, STACKSIZE);
591	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592	#ifdef PTHREAD_SCOPE_PROCESS
593	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594	#endif
595
596	sigfillset (&fullsigset);
597
598	LOCK (wrklock);	639	X_LOCK (wrklock);
599	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
600		640
601	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	641	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
602	{	642	{
603	wrk->prev = &wrk_first;	643	wrk->prev = &wrk_first;
604	wrk->next = wrk_first.next;	644	wrk->next = wrk_first.next;
605	wrk_first.next->prev = wrk;	645	wrk_first.next->prev = wrk;
606	wrk_first.next = wrk;	646	wrk_first.next = wrk;
607	++started;	647	++started;
608	}	648	}
609	else	649	else
610	free (wrk);	650	free (wrk);
611		651
612	sigprocmask (SIG_SETMASK, &oldsigset, 0);
613	UNLOCK (wrklock);	652	X_UNLOCK (wrklock);
614	}	653	}
615		654
616	static void maybe_start_thread ()	655	static void maybe_start_thread ()
617	{	656	{
618	if (get_nthreads () >= wanted)	657	if (get_nthreads () >= wanted)
…		…
625	start_thread ();	664	start_thread ();
626	}	665	}
627		666
628	static void req_send (aio_req req)	667	static void req_send (aio_req req)
629	{	668	{
		669	block_sig ();
		670
630	++nreqs;	671	++nreqs;
631		672
632	LOCK (reqlock);	673	X_LOCK (reqlock);
633	++nready;	674	++nready;
634	reqq_push (&req_queue, req);	675	reqq_push (&req_queue, req);
635	pthread_cond_signal (&reqwait);	676	X_COND_SIGNAL (reqwait);
636	UNLOCK (reqlock);	677	X_UNLOCK (reqlock);
		678
		679	unblock_sig ();
637		680
638	maybe_start_thread ();	681	maybe_start_thread ();
639	}	682	}
640		683
641	static void end_thread (void)	684	static void end_thread (void)
…		…
645	Newz (0, req, 1, aio_cb);	688	Newz (0, req, 1, aio_cb);
646		689
647	req->type = REQ_QUIT;	690	req->type = REQ_QUIT;
648	req->pri = PRI_MAX + PRI_BIAS;	691	req->pri = PRI_MAX + PRI_BIAS;
649		692
650	LOCK (reqlock);	693	X_LOCK (reqlock);
651	reqq_push (&req_queue, req);	694	reqq_push (&req_queue, req);
652	pthread_cond_signal (&reqwait);	695	X_COND_SIGNAL (reqwait);
653	UNLOCK (reqlock);	696	X_UNLOCK (reqlock);
654		697
655	LOCK (wrklock);	698	X_LOCK (wrklock);
656	--started;	699	--started;
657	UNLOCK (wrklock);	700	X_UNLOCK (wrklock);
658	}	701	}
659		702
660	static void set_max_idle (int nthreads)	703	static void set_max_idle (int nthreads)
661	{	704	{
662	if (WORDACCESS_UNSAFE) LOCK (reqlock);	705	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
663	max_idle = nthreads <= 0 ? 1 : nthreads;	706	max_idle = nthreads <= 0 ? 1 : nthreads;
664	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);	707	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
665	}	708	}
666		709
667	static void min_parallel (int nthreads)	710	static void min_parallel (int nthreads)
668	{	711	{
669	if (wanted < nthreads)	712	if (wanted < nthreads)
…		…
684	fd_set rfd;	727	fd_set rfd;
685		728
686	while (nreqs)	729	while (nreqs)
687	{	730	{
688	int size;	731	int size;
689	if (WORDACCESS_UNSAFE) LOCK (reslock);	732	if (WORDACCESS_UNSAFE) X_LOCK (reslock);
690	size = res_queue.size;	733	size = res_queue.size;
691	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	734	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);
692		735
693	if (size)	736	if (size)
694	return;	737	return;
695		738
696	maybe_start_thread ();	739	maybe_start_thread ();
…		…
712	aio_req req;	755	aio_req req;
713		756
714	if (max_poll_time)	757	if (max_poll_time)
715	gettimeofday (&tv_start, 0);	758	gettimeofday (&tv_start, 0);
716		759
		760	block_sig ();
		761
717	for (;;)	762	for (;;)
718	{	763	{
719	for (;;)	764	for (;;)
720	{	765	{
721	maybe_start_thread ();	766	maybe_start_thread ();
722		767
723	LOCK (reslock);	768	X_LOCK (reslock);
724	req = reqq_shift (&res_queue);	769	req = reqq_shift (&res_queue);
725		770
726	if (req)	771	if (req)
727	{	772	{
728	--npending;	773	--npending;
729		774
730	if (!res_queue.size)	775	if (!res_queue.size)
731	{	776	{
732	/* read any signals sent by the worker threads */	777	/* read any signals sent by the worker threads */
733	char buf [32];	778	char buf [4];
734	while (read (respipe [0], buf, 32) == 32)	779	while (read (respipe [0], buf, 4) == 4)
735	;	780	;
736	}	781	}
737	}	782	}
738		783
739	UNLOCK (reslock);	784	X_UNLOCK (reslock);
740		785
741	if (!req)	786	if (!req)
742	break;	787	break;
743		788
744	--nreqs;	789	--nreqs;
…		…
748	req->int1 = 1; /* mark request as delayed */	793	req->int1 = 1; /* mark request as delayed */
749	continue;	794	continue;
750	}	795	}
751	else	796	else
752	{	797	{
753	req_invoke (req);	798	if (!req_invoke (req))
		799	{
		800	req_destroy (req);
		801	unblock_sig ();
		802	croak (0);
		803	}
754		804
755	count++;	805	count++;
756	}	806	}
757		807
758	req_free (req);	808	req_destroy (req);
759		809
760	if (maxreqs && !--maxreqs)	810	if (maxreqs && !--maxreqs)
761	break;	811	break;
762		812
763	if (max_poll_time)	813	if (max_poll_time)
…		…
775	poll_wait ();	825	poll_wait ();
776		826
777	++maxreqs;	827	++maxreqs;
778	}	828	}
779		829
		830	unblock_sig ();
780	return count;	831	return count;
781	}
782
783	static void create_pipe ()
784	{
785	if (pipe (respipe))
786	croak ("unable to initialize result pipe");
787
788	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790
791	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
792	croak ("cannot set result pipe to nonblocking mode");
793	}	832	}
794		833
795	/*****************************************************************************/	834	/*****************************************************************************/
796	/* work around various missing functions */	835	/* work around various missing functions */
797		836
…		…
802	/*	841	/*
803	* make our pread/pwrite safe against themselves, but not against	842	* make our pread/pwrite safe against themselves, but not against
804	* normal read/write by using a mutex. slows down execution a lot,	843	* normal read/write by using a mutex. slows down execution a lot,
805	* but that's your problem, not mine.	844	* but that's your problem, not mine.
806	*/	845	*/
807	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	846	static mutex_t preadwritelock = X_MUTEX_INIT;
808		847
809	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	848	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810	{	849	{
811	ssize_t res;	850	ssize_t res;
812	off_t ooffset;	851	off_t ooffset;
813		852
814	LOCK (preadwritelock);	853	X_LOCK (preadwritelock);
815	ooffset = lseek (fd, 0, SEEK_CUR);	854	ooffset = lseek (fd, 0, SEEK_CUR);
816	lseek (fd, offset, SEEK_SET);	855	lseek (fd, offset, SEEK_SET);
817	res = read (fd, buf, count);	856	res = read (fd, buf, count);
818	lseek (fd, ooffset, SEEK_SET);	857	lseek (fd, ooffset, SEEK_SET);
819	UNLOCK (preadwritelock);	858	X_UNLOCK (preadwritelock);
820		859
821	return res;	860	return res;
822	}	861	}
823		862
824	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	863	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825	{	864	{
826	ssize_t res;	865	ssize_t res;
827	off_t ooffset;	866	off_t ooffset;
828		867
829	LOCK (preadwritelock);	868	X_LOCK (preadwritelock);
830	ooffset = lseek (fd, 0, SEEK_CUR);	869	ooffset = lseek (fd, 0, SEEK_CUR);
831	lseek (fd, offset, SEEK_SET);	870	lseek (fd, offset, SEEK_SET);
832	res = write (fd, buf, count);	871	res = write (fd, buf, count);
833	lseek (fd, offset, SEEK_SET);	872	lseek (fd, offset, SEEK_SET);
834	UNLOCK (preadwritelock);	873	X_UNLOCK (preadwritelock);
835		874
836	return res;	875	return res;
837	}	876	}
		877	#endif
		878
		879	#ifndef HAVE_FUTIMES
		880
		881	# define utimes(path,times) aio_utimes (path, times)
		882	# define futimes(fd,times) aio_futimes (fd, times)
		883
		884	int aio_utimes (const char *filename, const struct timeval times[2])
		885	{
		886	if (times)
		887	{
		888	struct utimbuf buf;
		889
		890	buf.actime = times[0].tv_sec;
		891	buf.modtime = times[1].tv_sec;
		892
		893	return utime (filename, &buf);
		894	}
		895	else
		896	return utime (filename, 0);
		897	}
		898
		899	int aio_futimes (int fd, const struct timeval tv[2])
		900	{
		901	errno = ENOSYS;
		902	return -1;
		903	}
		904
838	#endif	905	#endif
839		906
840	#if !HAVE_FDATASYNC	907	#if !HAVE_FDATASYNC
841	# define fdatasync fsync	908	# define fdatasync fsync
842	#endif	909	#endif
…		…
844	#if !HAVE_READAHEAD	911	#if !HAVE_READAHEAD
845	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	912	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846		913
847	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	914	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848	{	915	{
		916	size_t todo = count;
849	dBUF;	917	dBUF;
850		918
851	while (count > 0)	919	while (todo > 0)
852	{	920	{
853	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;	921	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
854		922
855	pread (fd, aio_buf, len, offset);	923	pread (fd, aio_buf, len, offset);
856	offset += len;	924	offset += len;
857	count -= len;	925	todo -= len;
858	}	926	}
859		927
860	errno = 0;	928	errno = 0;
		929	return count;
861	}	930	}
862		931
863	#endif	932	#endif
864		933
865	#if !HAVE_READDIR_R	934	#if !HAVE_READDIR_R
866	# define readdir_r aio_readdir_r	935	# define readdir_r aio_readdir_r
867		936
868	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	937	static mutex_t readdirlock = X_MUTEX_INIT;
869		938
870	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	939	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)
871	{	940	{
872	struct dirent *e;	941	X_DIRENT *e;
873	int errorno;	942	int errorno;
874		943
875	LOCK (readdirlock);	944	X_LOCK (readdirlock);
876		945
877	e = readdir (dirp);	946	e = readdir (dirp);
878	errorno = errno;	947	errorno = errno;
879		948
880	if (e)	949	if (e)
…		…
883	strcpy (ent->d_name, e->d_name);	952	strcpy (ent->d_name, e->d_name);
884	}	953	}
885	else	954	else
886	*res = 0;	955	*res = 0;
887		956
888	UNLOCK (readdirlock);	957	X_UNLOCK (readdirlock);
889		958
890	errno = errorno;	959	errno = errorno;
891	return e ? 0 : -1;	960	return e ? 0 : -1;
892	}	961	}
893	#endif	962	#endif
…		…
989	static void scandir_ (aio_req req, worker *self)	1058	static void scandir_ (aio_req req, worker *self)
990	{	1059	{
991	DIR *dirp;	1060	DIR *dirp;
992	union	1061	union
993	{	1062	{
994	struct dirent d;	1063	X_DIRENT d;
995	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1064	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
996	} *u;	1065	} *u;
997	struct dirent *entp;	1066	X_DIRENT *entp;
998	char *name, *names;	1067	char *name, *names;
999	int memlen = 4096;	1068	int memlen = 4096;
1000	int memofs = 0;	1069	int memofs = 0;
1001	int res = 0;	1070	int res = 0;
1002	int errorno;
1003		1071
1004	LOCK (wrklock);	1072	X_LOCK (wrklock);
1005	self->dirp = dirp = opendir (req->ptr1);	1073	self->dirp = dirp = opendir (req->ptr1);
1006	self->dbuf = u = malloc (sizeof (*u));	1074	self->dbuf = u = malloc (sizeof (*u));
1007	req->flags |= FLAG_PTR2_FREE;	1075	req->flags |= FLAG_PTR2_FREE;
1008	req->ptr2 = names = malloc (memlen);	1076	req->ptr2 = names = malloc (memlen);
1009	UNLOCK (wrklock);	1077	X_UNLOCK (wrklock);
1010		1078
1011	if (dirp && u && names)	1079	if (dirp && u && names)
1012	for (;;)	1080	for (;;)
1013	{	1081	{
1014	errno = 0;	1082	errno = 0;
…		…
1026	res++;	1094	res++;
1027		1095
1028	while (memofs + len > memlen)	1096	while (memofs + len > memlen)
1029	{	1097	{
1030	memlen *= 2;	1098	memlen *= 2;
1031	LOCK (wrklock);	1099	X_LOCK (wrklock);
1032	req->ptr2 = names = realloc (names, memlen);	1100	req->ptr2 = names = realloc (names, memlen);
1033	UNLOCK (wrklock);	1101	X_UNLOCK (wrklock);
1034		1102
1035	if (!names)	1103	if (!names)
1036	break;	1104	break;
1037	}	1105	}
1038		1106
…		…
1047	req->result = res;	1115	req->result = res;
1048	}	1116	}
1049		1117
1050	/*****************************************************************************/	1118	/*****************************************************************************/
1051		1119
1052	static void *aio_proc (void *thr_arg)	1120	X_THREAD_PROC (aio_proc)
1053	{	1121	{
		1122	{//D
1054	aio_req req;	1123	aio_req req;
1055	struct timespec ts;	1124	struct timespec ts;
1056	worker *self = (worker *)thr_arg;	1125	worker *self = (worker *)thr_arg;
1057		1126
1058	/* try to distribute timeouts somewhat evenly */	1127	/* try to distribute timeouts somewhat randomly */
1059	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)	1128	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1060	* (1000000000UL / 1024UL);
1061		1129
1062	for (;;)	1130	for (;;)
1063	{	1131	{
1064	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1132	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1065		1133
1066	LOCK (reqlock);	1134	X_LOCK (reqlock);
1067		1135
1068	for (;;)	1136	for (;;)
1069	{	1137	{
1070	self->req = req = reqq_shift (&req_queue);	1138	self->req = req = reqq_shift (&req_queue);
1071		1139
1072	if (req)	1140	if (req)
1073	break;	1141	break;
1074		1142
1075	++idle;	1143	++idle;
1076		1144
1077	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)	1145	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
1078	== ETIMEDOUT)	1146	== ETIMEDOUT)
1079	{	1147	{
1080	if (idle > max_idle)	1148	if (idle > max_idle)
1081	{	1149	{
1082	--idle;	1150	--idle;
1083	UNLOCK (reqlock);	1151	X_UNLOCK (reqlock);
1084	LOCK (wrklock);	1152	X_LOCK (wrklock);
1085	--started;	1153	--started;
1086	UNLOCK (wrklock);	1154	X_UNLOCK (wrklock);
1087	goto quit;	1155	goto quit;
1088	}	1156	}
1089		1157
1090	/* we are allowed to idle, so do so without any timeout */	1158	/* we are allowed to idle, so do so without any timeout */
1091	pthread_cond_wait (&reqwait, &reqlock);	1159	X_COND_WAIT (reqwait, reqlock);
1092	ts.tv_sec = time (0) + IDLE_TIMEOUT;	1160	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1093	}	1161	}
1094		1162
1095	--idle;	1163	--idle;
1096	}	1164	}
1097		1165
1098	--nready;	1166	--nready;
1099		1167
1100	UNLOCK (reqlock);	1168	X_UNLOCK (reqlock);
1101		1169
1102	errno = 0; /* strictly unnecessary */	1170	errno = 0; /* strictly unnecessary */
1103		1171
1104	if (!(req->flags & FLAG_CANCELLED))	1172	if (!(req->flags & FLAG_CANCELLED))
1105	switch (req->type)	1173	switch (req->type)
1106	{	1174	{
1107	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;	1175	case REQ_READ: req->result = req->offs >= 0
1108	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;	1176	? pread (req->int1, req->ptr1, req->size, req->offs)
		1177	: read (req->int1, req->ptr1, req->size); break;
		1178	case REQ_WRITE: req->result = req->offs >= 0
		1179	? pwrite (req->int1, req->ptr1, req->size, req->offs)
		1180	: write (req->int1, req->ptr1, req->size); break;
1109		1181
1110	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;	1182	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1111	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;	1183	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1112		1184
1113	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;	1185	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;	1186	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;	1187	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1188
		1189	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1190	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1191	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1192	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1193	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
		1194	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
1116		1195
1117	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;	1196	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118	case REQ_CLOSE: req->result = close (req->int1); break;	1197	case REQ_CLOSE: req->result = close (req->int1); break;
1119	case REQ_UNLINK: req->result = unlink (req->ptr1); break;	1198	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;	1199	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1200	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1121	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;	1201	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;	1202	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;	1203	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;	1204	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;	1205	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
…		…
1127	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;	1207	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128	case REQ_FSYNC: req->result = fsync (req->int1); break;	1208	case REQ_FSYNC: req->result = fsync (req->int1); break;
1129	case REQ_READDIR: scandir_ (req, self); break;	1209	case REQ_READDIR: scandir_ (req, self); break;
1130		1210
1131	case REQ_BUSY:	1211	case REQ_BUSY:
		1212	#ifdef _WIN32
		1213	Sleep (req->nv1 * 1000.);
		1214	#else
1132	{	1215	{
1133	struct timeval tv;	1216	struct timeval tv;
1134		1217
1135	tv.tv_sec = req->int1;	1218	tv.tv_sec = req->nv1;
1136	tv.tv_usec = req->int2;	1219	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
1137		1220
1138	req->result = select (0, 0, 0, 0, &tv);	1221	req->result = select (0, 0, 0, 0, &tv);
		1222	}
		1223	#endif
		1224	break;
		1225
		1226	case REQ_UTIME:
		1227	case REQ_FUTIME:
		1228	{
		1229	struct timeval tv[2];
		1230	struct timeval *times;
		1231
		1232	if (req->nv1 != -1. || req->nv2 != -1.)
		1233	{
		1234	tv[0].tv_sec = req->nv1;
		1235	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1236	tv[1].tv_sec = req->nv2;
		1237	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1238
		1239	times = tv;
		1240	}
		1241	else
		1242	times = 0;
		1243
		1244
		1245	req->result = req->type == REQ_FUTIME
		1246	? futimes (req->int1, times)
		1247	: utimes (req->ptr1, times);
1139	}	1248	}
1140		1249
1141	case REQ_GROUP:	1250	case REQ_GROUP:
1142	case REQ_NOP:	1251	case REQ_NOP:
1143	break;	1252	break;
1144		1253
1145	case REQ_QUIT:	1254	case REQ_QUIT:
1146	goto quit;	1255	goto quit;
1147		1256
1148	default:	1257	default:
1149	req->result = ENOSYS;	1258	req->result = -1;
1150	break;	1259	break;
1151	}	1260	}
1152		1261
1153	req->errorno = errno;	1262	req->errorno = errno;
1154		1263
1155	LOCK (reslock);	1264	X_LOCK (reslock);
1156		1265
1157	++npending;	1266	++npending;
1158		1267
1159	if (!reqq_push (&res_queue, req))	1268	if (!reqq_push (&res_queue, req))
		1269	{
1160	/* write a dummy byte to the pipe so fh becomes ready */	1270	/* write a dummy byte to the pipe so fh becomes ready */
1161	write (respipe [1], &respipe, 1);	1271	write (respipe [1], &respipe, 1);
		1272
		1273	/* optionally signal the main thread asynchronously */
		1274	if (main_sig)
		1275	pthread_kill (main_tid, main_sig);
		1276	}
1162		1277
1163	self->req = 0;	1278	self->req = 0;
1164	worker_clear (self);	1279	worker_clear (self);
1165		1280
1166	UNLOCK (reslock);	1281	X_UNLOCK (reslock);
1167	}	1282	}
1168		1283
1169	quit:	1284	quit:
1170	LOCK (wrklock);	1285	X_LOCK (wrklock);
1171	worker_free (self);	1286	worker_free (self);
1172	UNLOCK (wrklock);	1287	X_UNLOCK (wrklock);
1173		1288
1174	return 0;	1289	return 0;
		1290	}//D
1175	}	1291	}
1176		1292
1177	/*****************************************************************************/	1293	/*****************************************************************************/
1178		1294
1179	static void atfork_prepare (void)	1295	static void atfork_prepare (void)
1180	{	1296	{
1181	LOCK (wrklock);	1297	X_LOCK (wrklock);
1182	LOCK (reqlock);	1298	X_LOCK (reqlock);
1183	LOCK (reslock);	1299	X_LOCK (reslock);
1184	#if !HAVE_PREADWRITE	1300	#if !HAVE_PREADWRITE
1185	LOCK (preadwritelock);	1301	X_LOCK (preadwritelock);
1186	#endif	1302	#endif
1187	#if !HAVE_READDIR_R	1303	#if !HAVE_READDIR_R
1188	LOCK (readdirlock);	1304	X_LOCK (readdirlock);
1189	#endif	1305	#endif
1190	}	1306	}
1191		1307
1192	static void atfork_parent (void)	1308	static void atfork_parent (void)
1193	{	1309	{
1194	#if !HAVE_READDIR_R	1310	#if !HAVE_READDIR_R
1195	UNLOCK (readdirlock);	1311	X_UNLOCK (readdirlock);
1196	#endif	1312	#endif
1197	#if !HAVE_PREADWRITE	1313	#if !HAVE_PREADWRITE
1198	UNLOCK (preadwritelock);	1314	X_UNLOCK (preadwritelock);
1199	#endif	1315	#endif
1200	UNLOCK (reslock);	1316	X_UNLOCK (reslock);
1201	UNLOCK (reqlock);	1317	X_UNLOCK (reqlock);
1202	UNLOCK (wrklock);	1318	X_UNLOCK (wrklock);
1203	}	1319	}
1204		1320
1205	static void atfork_child (void)	1321	static void atfork_child (void)
1206	{	1322	{
1207	aio_req prv;	1323	aio_req prv;
1208		1324
1209	while (prv = reqq_shift (&req_queue))	1325	while (prv = reqq_shift (&req_queue))
1210	req_free (prv);	1326	req_destroy (prv);
1211		1327
1212	while (prv = reqq_shift (&res_queue))	1328	while (prv = reqq_shift (&res_queue))
1213	req_free (prv);	1329	req_destroy (prv);
1214		1330
1215	while (wrk_first.next != &wrk_first)	1331	while (wrk_first.next != &wrk_first)
1216	{	1332	{
1217	worker *wrk = wrk_first.next;	1333	worker *wrk = wrk_first.next;
1218		1334
1219	if (wrk->req)	1335	if (wrk->req)
1220	req_free (wrk->req);	1336	req_destroy (wrk->req);
1221		1337
1222	worker_clear (wrk);	1338	worker_clear (wrk);
1223	worker_free (wrk);	1339	worker_free (wrk);
1224	}	1340	}
1225		1341
…		…
1229	nready = 0;	1345	nready = 0;
1230	npending = 0;	1346	npending = 0;
1231		1347
1232	close (respipe [0]);	1348	close (respipe [0]);
1233	close (respipe [1]);	1349	close (respipe [1]);
1234	create_pipe ();	1350
		1351	if (!create_pipe (respipe))
		1352	croak ("cannot set result pipe to nonblocking mode");
1235		1353
1236	atfork_parent ();	1354	atfork_parent ();
1237	}	1355	}
1238		1356
1239	#define dREQ \	1357	#define dREQ \
…		…
1268	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1386	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1269	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1387	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1270	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1388	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));	1389	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));	1390	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1391	#ifdef _WIN32
		1392	X_MUTEX_CHECK (wrklock);
		1393	X_MUTEX_CHECK (reslock);
		1394	X_MUTEX_CHECK (reqlock);
		1395	X_MUTEX_CHECK (reqwait);
		1396	X_MUTEX_CHECK (preadwritelock);
		1397	X_MUTEX_CHECK (readdirlock);
		1398	#else
1273	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));	1399	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1400	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1401	#endif
1274		1402
1275	create_pipe ();	1403	if (!create_pipe (respipe))
		1404	croak ("cannot set result pipe to nonblocking mode");
		1405
1276	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1406	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
1277	}	1407	}
1278		1408
1279	void	1409	void
1280	max_poll_reqs (int nreqs)	1410	max_poll_reqs (int nreqs)
1281	PROTOTYPE: $	1411	PROTOTYPE: $
…		…
1310	max_outstanding = maxreqs;	1440	max_outstanding = maxreqs;
1311	OUTPUT:	1441	OUTPUT:
1312	RETVAL	1442	RETVAL
1313		1443
1314	void	1444	void
1315	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1445	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1316	SV8 * pathname
1317	int flags
1318	int mode
1319	SV * callback
1320	PROTOTYPE: $$$;$	1446	PROTOTYPE: $$$;$
1321	PPCODE:	1447	PPCODE:
1322	{	1448	{
1323	dREQ;	1449	dREQ;
1324		1450
…		…
1330		1456
1331	REQ_SEND;	1457	REQ_SEND;
1332	}	1458	}
1333		1459
1334	void	1460	void
1335	aio_close (fh,callback=&PL_sv_undef)	1461	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1336	SV * fh
1337	SV * callback
1338	PROTOTYPE: $;$	1462	PROTOTYPE: $;$
1339	ALIAS:	1463	ALIAS:
1340	aio_close = REQ_CLOSE	1464	aio_close = REQ_CLOSE
1341	aio_fsync = REQ_FSYNC	1465	aio_fsync = REQ_FSYNC
1342	aio_fdatasync = REQ_FDATASYNC	1466	aio_fdatasync = REQ_FDATASYNC
1343	PPCODE:	1467	PPCODE:
1344	{	1468	{
1345	dREQ;	1469	dREQ;
1346		1470
1347	req->type = ix;	1471	req->type = ix;
1348	req->fh = newSVsv (fh);	1472	req->sv1 = newSVsv (fh);
1349	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1473	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1350		1474
1351	REQ_SEND (req);	1475	REQ_SEND (req);
1352	}	1476	}
1353		1477
1354	void	1478	void
1355	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1479	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1356	SV * fh
1357	UV offset
1358	UV length
1359	SV8 * data
1360	UV dataoffset
1361	SV * callback
1362	ALIAS:	1480	ALIAS:
1363	aio_read = REQ_READ	1481	aio_read = REQ_READ
1364	aio_write = REQ_WRITE	1482	aio_write = REQ_WRITE
1365	PROTOTYPE: $$$$$;$	1483	PROTOTYPE: $$$$$;$
1366	PPCODE:	1484	PPCODE:
1367	{	1485	{
1368	STRLEN svlen;	1486	STRLEN svlen;
1369	char *svptr = SvPVbyte (data, svlen);	1487	char *svptr = SvPVbyte (data, svlen);
		1488	UV len = SvUV (length);
1370		1489
1371	SvUPGRADE (data, SVt_PV);	1490	SvUPGRADE (data, SVt_PV);
1372	SvPOK_on (data);	1491	SvPOK_on (data);
1373		1492
1374	if (dataoffset < 0)	1493	if (dataoffset < 0)
1375	dataoffset += svlen;	1494	dataoffset += svlen;
1376		1495
1377	if (dataoffset < 0 || dataoffset > svlen)	1496	if (dataoffset < 0 || dataoffset > svlen)
1378	croak ("data offset outside of string");	1497	croak ("dataoffset outside of data scalar");
1379		1498
1380	if (ix == REQ_WRITE)	1499	if (ix == REQ_WRITE)
1381	{	1500	{
1382	/* write: check length and adjust. */	1501	/* write: check length and adjust. */
1383	if (length < 0 || length + dataoffset > svlen)	1502	if (!SvOK (length) || len + dataoffset > svlen)
1384	length = svlen - dataoffset;	1503	len = svlen - dataoffset;
1385	}	1504	}
1386	else	1505	else
1387	{	1506	{
1388	/* read: grow scalar as necessary */	1507	/* read: grow scalar as necessary */
1389	svptr = SvGROW (data, length + dataoffset);	1508	svptr = SvGROW (data, len + dataoffset + 1);
1390	}	1509	}
1391		1510
1392	if (length < 0)	1511	if (len < 0)
1393	croak ("length must not be negative");	1512	croak ("length must not be negative");
1394		1513
1395	{	1514	{
1396	dREQ;	1515	dREQ;
1397		1516
1398	req->type = ix;	1517	req->type = ix;
1399	req->fh = newSVsv (fh);	1518	req->sv1 = newSVsv (fh);
1400	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1519	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1401	: IoOFP (sv_2io (fh)));	1520	: IoOFP (sv_2io (fh)));
1402	req->offs = offset;	1521	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1403	req->size = length;	1522	req->size = len;
1404	req->sv1 = SvREFCNT_inc (data);	1523	req->sv2 = SvREFCNT_inc (data);
1405	req->ptr1 = (char *)svptr + dataoffset;	1524	req->ptr1 = (char *)svptr + dataoffset;
1406	req->stroffset = dataoffset;	1525	req->stroffset = dataoffset;
1407		1526
1408	if (!SvREADONLY (data))	1527	if (!SvREADONLY (data))
1409	{	1528	{
1410	SvREADONLY_on (data);	1529	SvREADONLY_on (data);
1411	req->flags |= FLAG_SV1_RO_OFF;	1530	req->flags |= FLAG_SV2_RO_OFF;
1412	}	1531	}
1413		1532
1414	REQ_SEND;	1533	REQ_SEND;
1415	}	1534	}
1416	}	1535	}
1417		1536
1418	void	1537	void
1419	aio_readlink (path,callback=&PL_sv_undef)	1538	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1420	SV8 * path
1421	SV * callback
1422	PROTOTYPE: $$;$	1539	PROTOTYPE: $$;$
1423	PPCODE:	1540	PPCODE:
1424	{	1541	{
1425	SV *data;	1542	SV *data;
1426	dREQ;	1543	dREQ;
1427		1544
1428	data = newSV (NAME_MAX);	1545	data = newSV (NAME_MAX);
1429	SvPOK_on (data);	1546	SvPOK_on (data);
1430		1547
1431	req->type = REQ_READLINK;	1548	req->type = REQ_READLINK;
1432	req->fh = newSVsv (path);	1549	req->sv1 = newSVsv (path);
1433	req->ptr2 = SvPVbyte_nolen (req->fh);	1550	req->ptr2 = SvPVbyte_nolen (req->sv1);
1434	req->sv1 = data;	1551	req->sv2 = data;
1435	req->ptr1 = SvPVbyte_nolen (data);	1552	req->ptr1 = SvPVbyte_nolen (data);
1436		1553
1437	REQ_SEND;	1554	REQ_SEND;
1438	}	1555	}
1439		1556
1440	void	1557	void
1441	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1558	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1442	SV * out_fh
1443	SV * in_fh
1444	UV in_offset
1445	UV length
1446	SV * callback
1447	PROTOTYPE: $$$$;$	1559	PROTOTYPE: $$$$;$
1448	PPCODE:	1560	PPCODE:
1449	{	1561	{
1450	dREQ;	1562	dREQ;
1451		1563
1452	req->type = REQ_SENDFILE;	1564	req->type = REQ_SENDFILE;
1453	req->fh = newSVsv (out_fh);	1565	req->sv1 = newSVsv (out_fh);
1454	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1455	req->sv2 = newSVsv (in_fh);	1567	req->sv2 = newSVsv (in_fh);
1456	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1568	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1457	req->offs = in_offset;	1569	req->offs = SvVAL64 (in_offset);
1458	req->size = length;	1570	req->size = length;
1459		1571
1460	REQ_SEND;	1572	REQ_SEND;
1461	}	1573	}
1462		1574
1463	void	1575	void
1464	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1576	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1465	SV * fh
1466	UV offset
1467	IV length
1468	SV * callback
1469	PROTOTYPE: $$$;$	1577	PROTOTYPE: $$$;$
1470	PPCODE:	1578	PPCODE:
1471	{	1579	{
1472	dREQ;	1580	dREQ;
1473		1581
1474	req->type = REQ_READAHEAD;	1582	req->type = REQ_READAHEAD;
1475	req->fh = newSVsv (fh);	1583	req->sv1 = newSVsv (fh);
1476	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1584	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1477	req->offs = offset;	1585	req->offs = SvVAL64 (offset);
1478	req->size = length;	1586	req->size = length;
1479		1587
1480	REQ_SEND;	1588	REQ_SEND;
1481	}	1589	}
1482		1590
1483	void	1591	void
1484	aio_stat (fh_or_path,callback=&PL_sv_undef)	1592	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1485	SV8 * fh_or_path
1486	SV * callback
1487	ALIAS:	1593	ALIAS:
1488	aio_stat = REQ_STAT	1594	aio_stat = REQ_STAT
1489	aio_lstat = REQ_LSTAT	1595	aio_lstat = REQ_LSTAT
1490	PPCODE:	1596	PPCODE:
1491	{	1597	{
1492	dREQ;	1598	dREQ;
1493		1599
1494	req->ptr2 = malloc (sizeof (Stat_t));	1600	req->ptr2 = malloc (sizeof (Stat_t));
1495	if (!req->ptr2)	1601	if (!req->ptr2)
1496	{	1602	{
1497	req_free (req);	1603	req_destroy (req);
1498	croak ("out of memory during aio_stat statdata allocation");	1604	croak ("out of memory during aio_stat statdata allocation");
1499	}	1605	}
1500		1606
1501	req->flags |= FLAG_PTR2_FREE;	1607	req->flags |= FLAG_PTR2_FREE;
		1608	req->sv1 = newSVsv (fh_or_path);
1502		1609
1503	if (SvPOK (fh_or_path))	1610	if (SvPOK (fh_or_path))
1504	{	1611	{
1505	req->type = ix;	1612	req->type = ix;
1506	req->sv1 = newSVsv (fh_or_path);
1507	req->ptr1 = SvPVbyte_nolen (req->sv1);	1613	req->ptr1 = SvPVbyte_nolen (req->sv1);
1508	}	1614	}
1509	else	1615	else
1510	{	1616	{
1511	req->type = REQ_FSTAT;	1617	req->type = REQ_FSTAT;
1512	req->fh = newSVsv (fh_or_path);
1513	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1618	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1514	}	1619	}
1515		1620
1516	REQ_SEND;	1621	REQ_SEND;
1517	}	1622	}
1518		1623
1519	void	1624	void
		1625	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1626	PPCODE:
		1627	{
		1628	dREQ;
		1629
		1630	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1631	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1632	req->sv1 = newSVsv (fh_or_path);
		1633
		1634	if (SvPOK (fh_or_path))
		1635	{
		1636	req->type = REQ_UTIME;
		1637	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1638	}
		1639	else
		1640	{
		1641	req->type = REQ_FUTIME;
		1642	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1643	}
		1644
		1645	REQ_SEND;
		1646	}
		1647
		1648	void
		1649	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1650	PPCODE:
		1651	{
		1652	dREQ;
		1653
		1654	req->sv1 = newSVsv (fh_or_path);
		1655	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1656
		1657	if (SvPOK (fh_or_path))
		1658	{
		1659	req->type = REQ_TRUNCATE;
		1660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1661	}
		1662	else
		1663	{
		1664	req->type = REQ_FTRUNCATE;
		1665	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1666	}
		1667
		1668	REQ_SEND;
		1669	}
		1670
		1671	void
		1672	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1673	PPCODE:
		1674	{
		1675	dREQ;
		1676
		1677	req->mode = mode;
		1678	req->sv1 = newSVsv (fh_or_path);
		1679
		1680	if (SvPOK (fh_or_path))
		1681	{
		1682	req->type = REQ_CHMOD;
		1683	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1684	}
		1685	else
		1686	{
		1687	req->type = REQ_FCHMOD;
		1688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1689	}
		1690
		1691	REQ_SEND;
		1692	}
		1693
		1694	void
		1695	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1696	PPCODE:
		1697	{
		1698	dREQ;
		1699
		1700	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1701	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1702	req->sv1 = newSVsv (fh_or_path);
		1703
		1704	if (SvPOK (fh_or_path))
		1705	{
		1706	req->type = REQ_CHOWN;
		1707	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1708	}
		1709	else
		1710	{
		1711	req->type = REQ_FCHOWN;
		1712	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1713	}
		1714
		1715	REQ_SEND;
		1716	}
		1717
		1718	void
1520	aio_unlink (pathname,callback=&PL_sv_undef)	1719	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1521	SV8 * pathname
1522	SV * callback
1523	ALIAS:	1720	ALIAS:
1524	aio_unlink = REQ_UNLINK	1721	aio_unlink = REQ_UNLINK
1525	aio_rmdir = REQ_RMDIR	1722	aio_rmdir = REQ_RMDIR
1526	aio_readdir = REQ_READDIR	1723	aio_readdir = REQ_READDIR
1527	PPCODE:	1724	PPCODE:
…		…
1534		1731
1535	REQ_SEND;	1732	REQ_SEND;
1536	}	1733	}
1537		1734
1538	void	1735	void
		1736	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1737	PPCODE:
		1738	{
		1739	dREQ;
		1740
		1741	req->type = REQ_MKDIR;
		1742	req->sv1 = newSVsv (pathname);
		1743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1744	req->mode = mode;
		1745
		1746	REQ_SEND;
		1747	}
		1748
		1749	void
1539	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1750	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1540	SV8 * oldpath
1541	SV8 * newpath
1542	SV * callback
1543	ALIAS:	1751	ALIAS:
1544	aio_link = REQ_LINK	1752	aio_link = REQ_LINK
1545	aio_symlink = REQ_SYMLINK	1753	aio_symlink = REQ_SYMLINK
1546	aio_rename = REQ_RENAME	1754	aio_rename = REQ_RENAME
1547	PPCODE:	1755	PPCODE:
1548	{	1756	{
1549	dREQ;	1757	dREQ;
1550		1758
1551	req->type = ix;	1759	req->type = ix;
1552	req->fh = newSVsv (oldpath);	1760	req->sv2 = newSVsv (oldpath);
1553	req->ptr2 = SvPVbyte_nolen (req->fh);	1761	req->ptr2 = SvPVbyte_nolen (req->sv2);
1554	req->sv1 = newSVsv (newpath);	1762	req->sv1 = newSVsv (newpath);
1555	req->ptr1 = SvPVbyte_nolen (req->sv1);	1763	req->ptr1 = SvPVbyte_nolen (req->sv1);
1556		1764
1557	REQ_SEND;	1765	REQ_SEND;
1558	}	1766	}
1559		1767
1560	void	1768	void
1561	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1769	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1562	SV8 * pathname
1563	SV * callback
1564	UV mode
1565	UV dev
1566	PPCODE:	1770	PPCODE:
1567	{	1771	{
1568	dREQ;	1772	dREQ;
1569		1773
1570	req->type = REQ_MKNOD;	1774	req->type = REQ_MKNOD;
…		…
1575		1779
1576	REQ_SEND;	1780	REQ_SEND;
1577	}	1781	}
1578		1782
1579	void	1783	void
1580	aio_busy (delay,callback=&PL_sv_undef)	1784	aio_busy (double delay, SV *callback=&PL_sv_undef)
1581	double delay
1582	SV * callback
1583	PPCODE:	1785	PPCODE:
1584	{	1786	{
1585	dREQ;	1787	dREQ;
1586		1788
1587	req->type = REQ_BUSY;	1789	req->type = REQ_BUSY;
1588	req->int1 = delay < 0. ? 0 : delay;	1790	req->nv1 = delay < 0. ? 0. : delay;
1589	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590		1791
1591	REQ_SEND;	1792	REQ_SEND;
1592	}	1793	}
1593		1794
1594	void	1795	void
1595	aio_group (callback=&PL_sv_undef)	1796	aio_group (SV *callback=&PL_sv_undef)
1596	SV * callback
1597	PROTOTYPE: ;$	1797	PROTOTYPE: ;$
1598	PPCODE:	1798	PPCODE:
1599	{	1799	{
1600	dREQ;	1800	dREQ;
1601		1801
…		…
1604	req_send (req);	1804	req_send (req);
1605	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1805	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1606	}	1806	}
1607		1807
1608	void	1808	void
1609	aio_nop (callback=&PL_sv_undef)	1809	aio_nop (SV *callback=&PL_sv_undef)
1610	SV * callback
1611	PPCODE:	1810	PPCODE:
1612	{	1811	{
1613	dREQ;	1812	dREQ;
1614		1813
1615	req->type = REQ_NOP;	1814	req->type = REQ_NOP;
…		…
1678	poll_wait()	1877	poll_wait()
1679	PROTOTYPE:	1878	PROTOTYPE:
1680	CODE:	1879	CODE:
1681	poll_wait ();	1880	poll_wait ();
1682		1881
		1882	void
		1883	setsig (int signum = SIGIO)
		1884	PROTOTYPE: ;$
		1885	CODE:
		1886	{
		1887	if (block_sig_level)
		1888	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1889
		1890	X_LOCK (reslock);
		1891	main_tid = pthread_self ();
		1892	main_sig = signum;
		1893	X_UNLOCK (reslock);
		1894
		1895	if (main_sig && npending)
		1896	pthread_kill (main_tid, main_sig);
		1897	}
		1898
		1899	void
		1900	aio_block (SV *cb)
		1901	PROTOTYPE: &
		1902	PPCODE:
		1903	{
		1904	int count;
		1905
		1906	block_sig ();
		1907	PUSHMARK (SP);
		1908	PUTBACK;
		1909	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1910	SPAGAIN;
		1911	unblock_sig ();
		1912
		1913	if (SvTRUE (ERRSV))
		1914	croak (0);
		1915
		1916	XSRETURN (count);
		1917	}
		1918
1683	int	1919	int
1684	nreqs()	1920	nreqs()
1685	PROTOTYPE:	1921	PROTOTYPE:
1686	CODE:	1922	CODE:
1687	RETVAL = nreqs;	1923	RETVAL = nreqs;
…		…
1706		1942
1707	int	1943	int
1708	nthreads()	1944	nthreads()
1709	PROTOTYPE:	1945	PROTOTYPE:
1710	CODE:	1946	CODE:
1711	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1947	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
1712	RETVAL = started;	1948	RETVAL = started;
1713	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);	1949	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
1714	OUTPUT:	1950	OUTPUT:
1715	RETVAL	1951	RETVAL
1716		1952
1717	PROTOTYPES: DISABLE	1953	PROTOTYPES: DISABLE
1718		1954
…		…
1736	PPCODE:	1972	PPCODE:
1737	{	1973	{
1738	int i;	1974	int i;
1739	aio_req req;	1975	aio_req req;
1740		1976
		1977	if (main_sig && !block_sig_level)
		1978	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1979
1741	if (grp->int1 == 2)	1980	if (grp->int1 == 2)
1742	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1981	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1743		1982
1744	for (i = 1; i < items; ++i )	1983	for (i = 1; i < items; ++i )
1745	{	1984	{

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