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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.86 by root, Mon Oct 30 23:30:00 2006 UTC vs.
Revision 1.189 by root, Mon Jul 18 01:27:03 2011 UTC

1	/* solaris */	1	#include "libeio/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"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
27	#include <limits.h>	16	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	17	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	18	#include <sched.h>
32		19
33	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>
36	# elif __freebsd
37	# include <sys/socket.h>
38	# include <sys/uio.h>	21	# include <sys/mman.h>
39	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#else
		68
40	# include <sys/socket.h>	69	#include <sys/time.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	STRLEN stroffset; \
		113	SV *self;
		114
		115	#define EIO_NO_WRAPPERS 1
		116
		117	#include "libeio/config.h"
		118	#include "libeio/eio.h"
		119
		120	static int req_invoke (eio_req *req);
		121	#define EIO_FINISH(req) req_invoke (req)
		122	static void req_destroy (eio_req *grp);
		123	#define EIO_DESTROY(req) req_destroy (req)
		124
		125	#include "libeio/eio.c"
		126
		127	/* Linux/others */
		128	#ifndef O_ASYNC
		129	# define O_ASYNC 0
		130	#endif
		131	#ifndef O_DIRECT
		132	# define O_DIRECT 0
		133	#endif
		134	#ifndef O_NOATIME
		135	# define O_NOATIME 0
		136	#endif
		137
		138	/* POSIX */
		139	#ifndef O_CLOEXEC
		140	# define O_CLOEXEC 0
		141	#endif
		142	#ifndef O_NOFOLLOW
		143	# define O_NOFOLLOW 0
		144	#endif
		145	#ifndef O_NOCTTY
		146	# define O_NOCTTY 0
		147	#endif
		148	#ifndef O_NONBLOCK
		149	# define O_NONBLOCK 0
		150	#endif
		151	#ifndef O_EXEC
		152	# define O_EXEC 0
		153	#endif
		154	#ifndef O_SEARCH
		155	# define O_SEARCH 0
		156	#endif
		157	#ifndef O_DIRECTORY
		158	# define O_DIRECTORY 0
		159	#endif
		160	#ifndef O_DSYNC
		161	# define O_DSYNC 0
		162	#endif
		163	#ifndef O_RSYNC
		164	# define O_RSYNC 0
		165	#endif
		166	#ifndef O_SYNC
		167	# define O_SYNC 0
		168	#endif
		169	#ifndef O_TTY_INIT
		170	# define O_TTY_INIT 0
		171	#endif
		172
		173	#ifndef POSIX_FADV_NORMAL
		174	# define POSIX_FADV_NORMAL 0
		175	#endif
		176	#ifndef POSIX_FADV_SEQUENTIAL
		177	# define POSIX_FADV_SEQUENTIAL 0
		178	#endif
		179	#ifndef POSIX_FADV_RANDOM
		180	# define POSIX_FADV_RANDOM 0
		181	#endif
		182	#ifndef POSIX_FADV_NOREUSE
		183	# define POSIX_FADV_NOREUSE 0
		184	#endif
		185	#ifndef POSIX_FADV_WILLNEED
		186	# define POSIX_FADV_WILLNEED 0
		187	#endif
		188	#ifndef POSIX_FADV_DONTNEED
		189	# define POSIX_FADV_DONTNEED 0
		190	#endif
		191
		192	#if !HAVE_POSIX_FADVISE
		193	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		194	#endif
		195
		196	#ifndef POSIX_MADV_NORMAL
		197	# define POSIX_MADV_NORMAL 0
		198	#endif
		199	#ifndef POSIX_MADV_SEQUENTIAL
		200	# define POSIX_MADV_SEQUENTIAL 0
		201	#endif
		202	#ifndef POSIX_MADV_RANDOM
		203	# define POSIX_MADV_RANDOM 0
		204	#endif
		205	#ifndef POSIX_MADV_WILLNEED
		206	# define POSIX_MADV_WILLNEED 0
		207	#endif
		208	#ifndef POSIX_MADV_DONTNEED
		209	# define POSIX_MADV_DONTNEED 0
		210	#endif
		211
		212	#if !HAVE_POSIX_MADVISE
		213	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		214	#endif
		215
		216	#ifndef PROT_NONE
		217	# define PROT_NONE 0
		218	#endif
		219	#ifndef PROT_READ
		220	# define PROT_READ 0
		221	#endif
		222	#ifndef PROT_WRITE
		223	# define PROT_READ 0
		224	#endif
		225	#ifndef PROT_EXEC
		226	# define PROT_EXEC 0
		227	#endif
		228
		229	#ifndef ST_RDONLY
		230	# define ST_RDONLY 0
		231	#endif
		232	#ifndef ST_NOSUID
		233	# define ST_NOSUID 0
		234	#endif
		235	#ifndef ST_NODEV
		236	# define ST_NODEV 0
		237	#endif
		238	#ifndef ST_NOEXEC
		239	# define ST_NOEXEC 0
		240	#endif
		241	#ifndef ST_SYNCHRONOUS
		242	# define ST_SYNCHRONOUS 0
		243	#endif
		244	#ifndef ST_MANDLOCK
		245	# define ST_MANDLOCK 0
		246	#endif
		247	#ifndef ST_WRITE
		248	# define ST_WRITE 0
		249	#endif
		250	#ifndef ST_APPEND
		251	# define ST_APPEND 0
		252	#endif
		253	#ifndef ST_IMMUTABLE
		254	# define ST_IMMUTABLE 0
		255	#endif
		256	#ifndef ST_NOATIME
		257	# define ST_NOATIME 0
		258	#endif
		259	#ifndef ST_NODIRATIME
		260	# define ST_NODIRATIME 0
		261	#endif
		262	#ifndef ST_RELATIME
		263	# define ST_RELATIME 0
		264	#endif
		265
		266	#ifndef S_IFIFO
		267	# define S_IFIFO 0
		268	#endif
		269	#ifndef S_IFCHR
		270	# define S_IFCHR 0
		271	#endif
		272	#ifndef S_IFBLK
		273	# define S_IFBLK 0
		274	#endif
		275	#ifndef S_IFLNK
		276	# define S_IFLNK 0
		277	#endif
		278	#ifndef S_IFREG
		279	# define S_IFREG 0
		280	#endif
		281	#ifndef S_IFDIR
		282	# define S_IFDIR 0
		283	#endif
		284	#ifndef S_IFWHT
		285	# define S_IFWHT 0
		286	#endif
		287	#ifndef S_IFSOCK
		288	# define S_IFSOCK 0
		289	#endif
		290
		291	#ifndef MAP_ANONYMOUS
		292	# ifdef MAP_ANON
		293	# define MAP_ANONYMOUS MAP_ANON
43	# else	294	# else
44	# error sendfile support requested but not available	295	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	296	# endif
46	#endif	297	#endif
47		298	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	299	# define MAP_HUGETLB 0
49	#define IDLE_TIMEOUT 10
50
51	/* used for struct dirent, AIX doesn't provide it */
52	#ifndef NAME_MAX
53	# define NAME_MAX 4096
54	#endif
55
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	300	#endif
		301	#ifndef MAP_LOCKED
		302	# define MAP_LOCKED 0
79	#endif	303	#endif
		304	#ifndef MAP_NORESERVE
		305	# define MAP_NORESERVE 0
		306	#endif
		307	#ifndef MAP_POPULATE
		308	# define MAP_POPULATE 0
		309	#endif
		310	#ifndef MAP_NONBLOCK
		311	# define MAP_NONBLOCK 0
		312	#endif
80		313
81	/* buffer size for various temporary buffers */	314	#ifndef makedev
82	#define AIO_BUFSIZE 65536	315	# define makedev(maj,min) (((maj) << 8) | (min))
		316	#endif
		317	#ifndef major
		318	# define major(dev) ((dev) >> 8)
		319	#endif
		320	#ifndef minor
		321	# define minor(dev) ((dev) & 0xff)
		322	#endif
83		323
84	#define dBUF \	324	#ifndef PAGESIZE
85	char *aio_buf; \	325	# define PAGESIZE sysconf (_SC_PAGESIZE)
86	LOCK (wrklock); \	326	#endif
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		327
92	enum {	328	enum {
93	REQ_QUIT,	329	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	330	};
105		331
106	#define AIO_REQ_KLASS "IO::AIO::REQ"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *callback, *fh;
114	SV *sv1, *sv2;
115	void *ptr1, *ptr2;
116	Stat_t *statdata;
117	off_t offs;
118	size_t size;
119	ssize_t result;
120
121	STRLEN stroffset;
122	int type;
123	int int1, int2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */
137	};
138
139	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
140	typedef aio_cb *aio_req_ornot;	333	typedef eio_req *aio_req_ornot;
141		334
142	enum {	335	static SV *on_next_submit;
143	PRI_MIN = -4,	336	static int next_pri = EIO_PRI_DEFAULT;
144	PRI_MAX = 4,	337	static int max_outstanding;
145		338
146	DEFAULT_PRI = 0,	339	static s_epipe respipe;
147	PRI_BIAS = -PRI_MIN,
148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149	};
150		340
151	#define AIO_TICKS ((1000000 + 1023) >> 10)
152
153	static unsigned int max_poll_time = 0;
154	static unsigned int max_poll_reqs = 0;
155
156	/* calculcate time difference in ~1/AIO_TICKS of a second */
157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
158	{
159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
161	}
162
163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
164
165	static unsigned int started, idle, wanted;
166
167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
169	#else
170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
171	#endif
172
173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
175
176	/* worker threads management */
177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
178
179	typedef struct worker {
180	/* locked by wrklock */
181	struct worker *prev, *next;
182
183	pthread_t tid;
184
185	/* locked by reslock, reqlock or wrklock */
186	aio_req req; /* currently processed request */
187	void *dbuf;
188	DIR *dirp;
189	} worker;
190
191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
192
193	static void worker_clear (worker *wrk)
194	{
195	if (wrk->dirp)
196	{
197	closedir (wrk->dirp);
198	wrk->dirp = 0;
199	}
200
201	if (wrk->dbuf)
202	{
203	free (wrk->dbuf);
204	wrk->dbuf = 0;
205	}
206	}
207
208	static void worker_free (worker *wrk)
209	{
210	wrk->next->prev = wrk->prev;
211	wrk->prev->next = wrk->next;
212
213	free (wrk);
214	}
215
216	static volatile unsigned int nreqs, nready, npending;
217	static volatile unsigned int max_idle = 4;
218	static volatile unsigned int max_outstanding = 0xffffffff;
219	static int respipe [2];
220
221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
224
225	#if WORDACCESS_UNSAFE
226
227	static unsigned int get_nready ()
228	{
229	unsigned int retval;
230
231	LOCK (reqlock);
232	retval = nready;
233	UNLOCK (reqlock);
234
235	return retval;
236	}
237
238	static unsigned int get_npending ()
239	{
240	unsigned int retval;
241
242	LOCK (reslock);
243	retval = npending;
244	UNLOCK (reslock);
245
246	return retval;
247	}
248
249	static unsigned int get_nthreads ()
250	{
251	unsigned int retval;
252
253	LOCK (wrklock);
254	retval = started;
255	UNLOCK (wrklock);
256
257	return retval;
258	}
259
260	#else
261
262	# define get_nready() nready
263	# define get_npending() npending
264	# define get_nthreads() started
265
266	#endif
267
268	/*
269	* a somewhat faster data structure might be nice, but
270	* with 8 priorities this actually needs <20 insns
271	* per shift, the most expensive operation.
272	*/
273	typedef struct {
274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
275	int size;
276	} reqq;
277
278	static reqq req_queue;
279	static reqq res_queue;
280
281	int reqq_push (reqq *q, aio_req req)
282	{
283	int pri = req->pri;
284	req->next = 0;
285
286	if (q->qe[pri])
287	{
288	q->qe[pri]->next = req;
289	q->qe[pri] = req;
290	}
291	else
292	q->qe[pri] = q->qs[pri] = req;
293
294	return q->size++;
295	}
296
297	aio_req reqq_shift (reqq *q)
298	{
299	int pri;
300
301	if (!q->size)
302	return 0;
303
304	--q->size;
305
306	for (pri = NUM_PRI; pri--; )
307	{
308	aio_req req = q->qs[pri];
309
310	if (req)
311	{
312	if (!(q->qs[pri] = req->next))
313	q->qe[pri] = 0;
314
315	return req;
316	}
317	}
318
319	abort ();
320	}
321
322	static int poll_cb ();
323	static void req_invoke (aio_req req);
324	static void req_free (aio_req req);	341	static void req_destroy (aio_req req);
325	static void req_cancel (aio_req req);	342	static void req_cancel (aio_req req);
326		343
		344	static void want_poll (void)
		345	{
		346	/* write a dummy byte to the pipe so fh becomes ready */
		347	s_epipe_signal (&respipe);
		348	}
		349
		350	static void done_poll (void)
		351	{
		352	/* read any signals sent by the worker threads */
		353	s_epipe_drain (&respipe);
		354	}
		355
327	/* must be called at most once */	356	/* must be called at most once */
328	static SV *req_sv (aio_req req, const char *klass)	357	static SV *req_sv (aio_req req, HV *stash)
329	{	358	{
330	if (!req->self)	359	if (!req->self)
331	{	360	{
332	req->self = (SV *)newHV ();	361	req->self = (SV *)newHV ();
333	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
334	}	363	}
335		364
336	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
337	}	366	}
338		367
339	static aio_req SvAIO_REQ (SV *sv)	368	static aio_req SvAIO_REQ (SV *sv)
340	{	369	{
341	MAGIC *mg;	370	MAGIC *mg;
342		371
343	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
344	croak ("object of class " AIO_REQ_KLASS " expected");	376	croak ("object of class IO::AIO::REQ expected");
345		377
346	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
347		379
348	return mg ? (aio_req)mg->mg_ptr : 0;	380	return mg ? (aio_req)mg->mg_ptr : 0;
349	}	381	}
350		382
351	static void aio_grp_feed (aio_req grp)	383	static void aio_grp_feed (aio_req grp)
352	{	384	{
353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	385	if (grp->sv2 && SvOK (grp->sv2))
354	{	386	{
355	int old_len = grp->size;
356
357	if (grp->sv2 && SvOK (grp->sv2))
358	{
359	dSP;	387	dSP;
360		388
361	ENTER;	389	ENTER;
362	SAVETMPS;	390	SAVETMPS;
363	PUSHMARK (SP);	391	PUSHMARK (SP);
364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	392	XPUSHs (req_sv (grp, aio_grp_stash));
365	PUTBACK;	393	PUTBACK;
366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367	SPAGAIN;	395	SPAGAIN;
368	FREETMPS;	396	FREETMPS;
369	LEAVE;	397	LEAVE;
370	}
371
372	/* stop if no progress has been made */
373	if (old_len == grp->size)
374	{
375	SvREFCNT_dec (grp->sv2);
376	grp->sv2 = 0;
377	break;
378	}
379	}	398	}
380	}	399	}
381		400
382	static void aio_grp_dec (aio_req grp)	401	static void req_submit (eio_req *req)
383	{	402	{
384	--grp->size;	403	eio_submit (req);
385		404
386	/* call feeder, if applicable */	405	if (expect_false (on_next_submit))
387	aio_grp_feed (grp);
388
389	/* finish, if done */
390	if (!grp->size && grp->int1)
391	{	406	{
392	req_invoke (grp);	407	dSP;
393	req_free (grp);	408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
394	}	415	}
395	}	416	}
396		417
397	static void req_invoke (aio_req req)	418	static int req_invoke (eio_req *req)
398	{	419	{
399	dSP;
400
401	if (req->flags & FLAG_DATA_RO_OFF)	420	if (req->flags & FLAG_SV2_RO_OFF)
402	SvREADONLY_off (req->sv1);	421	SvREADONLY_off (req->sv2);
403		422
404	if (req->statdata)	423	if (!EIO_CANCELLED (req) && req->callback)
405	{	424	{
406	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	425	dSP;
407	PL_laststatval = req->result;	426	static SV *sv_result_cache; /* caches the result integer SV */
408	PL_statcache = *(req->statdata);	427	SV *sv_result;
409	}
410		428
411	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
412	{
413	ENTER;	429	ENTER;
414	SAVETMPS;	430	SAVETMPS;
415	PUSHMARK (SP);	431	PUSHMARK (SP);
416	EXTEND (SP, 1);	432	EXTEND (SP, 1);
417		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
		436	{
		437	sv_result = sv_result_cache; sv_result_cache = 0;
		438	SvIV_set (sv_result, req->result);
		439	SvIOK_only (sv_result);
		440	}
		441	else
		442	{
		443	sv_result = newSViv (req->result);
		444	SvREADONLY_on (sv_result);
		445	}
		446
418	switch (req->type)	447	switch (req->type)
419	{	448	{
420	case REQ_READDIR:	449	case EIO_READDIR:
421	{	450	{
422	SV *rv = &PL_sv_undef;	451	SV *rv = &PL_sv_undef;
423		452
424	if (req->result >= 0)	453	if (req->result >= 0)
425	{	454	{
426	int i;	455	int i;
427	char *buf = req->ptr2;	456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
428	AV *av = newAV ();	458	AV *av = newAV ();
429		459
430	av_extend (av, req->result - 1);	460	av_extend (av, req->result - 1);
431		461
432	for (i = 0; i < req->result; ++i)	462	for (i = 0; i < req->result; ++i)
433	{	463	{
434	SV *sv = newSVpv (buf, 0);	464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
435		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
436	av_store (av, i, sv);	488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
		494	SV *name = newSVpv (names, 0);
		495	av_store (av, i, name);
437	buf += SvCUR (sv) + 1;	496	names += SvCUR (name) + 1;
		497	}
438	}	498	}
439		499
440	rv = sv_2mortal (newRV_noinc ((SV *)av));	500	rv = sv_2mortal (newRV_noinc ((SV *)av));
441	}	501	}
442		502
443	PUSHs (rv);	503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
444	}	507	}
445	break;	508	break;
446		509
447	case REQ_OPEN:	510	case EIO_OPEN:
448	{	511	{
449	/* convert fd to fh */	512	/* convert fd to fh */
450	SV *fh;	513	SV *fh = &PL_sv_undef;
451		514
452	PUSHs (sv_2mortal (newSViv (req->result)));	515	if (req->result >= 0)
453	PUTBACK;	516	{
454	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	517	GV *gv = (GV *)sv_newmortal ();
455	SPAGAIN;	518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
456		524
457	fh = SvREFCNT_inc (POPs);	525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
458		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
459	PUSHMARK (SP);	537	PUSHs (fh);
460	XPUSHs (sv_2mortal (fh));
461	}	538	}
462	break;	539	break;
463		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	#ifndef _WIN32
		547	if (req->result >= 0)
		548	{
		549	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		550	HV *hv = newHV ();
		551
		552	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		553
		554	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		555	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		556	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		557	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		558	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		559	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		560	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		561	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		562	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		563	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		564	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		565	}
		566	#endif
		567
		568	PUSHs (rv);
		569	}
		570
		571	break;
		572
464	case REQ_GROUP:	573	case EIO_GROUP:
465	req->int1 = 2; /* mark group as finished */	574	req->int1 = 2; /* mark group as finished */
466		575
467	if (req->sv1)	576	if (req->sv1)
468	{	577	{
469	int i;	578	int i;
…		…
473	for (i = 0; i <= AvFILL (av); ++i)	582	for (i = 0; i <= AvFILL (av); ++i)
474	PUSHs (*av_fetch (av, i, 0));	583	PUSHs (*av_fetch (av, i, 0));
475	}	584	}
476	break;	585	break;
477		586
478	case REQ_NOP:	587	case EIO_NOP:
479	case REQ_BUSY:	588	case EIO_BUSY:
480	break;	589	break;
481		590
482	case REQ_READLINK:	591	case EIO_READLINK:
		592	case EIO_REALPATH:
483	if (req->result > 0)	593	if (req->result > 0)
484	{	594	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
485	SvCUR_set (req->sv1, req->result);
486	*SvEND (req->sv1) = 0;
487	PUSHs (req->sv1);
488	}
489	break;	595	break;
490		596
		597	case EIO_STAT:
		598	case EIO_LSTAT:
		599	case EIO_FSTAT:
		600	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		601	PL_laststatval = req->result;
		602	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		603	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		604	PUSHs (sv_result);
		605	break;
		606
491	case REQ_READ:	607	case EIO_READ:
		608	{
492	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	609	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
493	*SvEND (req->sv1) = 0;	610	*SvEND (req->sv2) = 0;
494	/* fall through */	611	SvPOK_only (req->sv2);
		612	SvSETMAGIC (req->sv2);
		613	PUSHs (sv_result);
		614	}
		615	break;
		616
		617	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		618	if (req->result > 0)
		619	SvIV_set (sv_result, 0);
		620	/* FALLTHROUGH */
		621
495	default:	622	default:
496	PUSHs (sv_2mortal (newSViv (req->result)));	623	PUSHs (sv_result);
497	break;	624	break;
498	}	625	}
499		626
500	errno = req->errorno;	627	errno = req->errorno;
501		628
502	PUTBACK;	629	PUTBACK;
503	call_sv (req->callback, G_VOID | G_EVAL);	630	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
504	SPAGAIN;	631	SPAGAIN;
		632
		633	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		634	SvREFCNT_dec (sv_result);
		635	else
		636	sv_result_cache = sv_result;
505		637
506	FREETMPS;	638	FREETMPS;
507	LEAVE;	639	LEAVE;
		640
		641	PUTBACK;
508	}	642	}
509		643
510	if (req->grp)	644	return !!SvTRUE (ERRSV);
511	{
512	aio_req grp = req->grp;
513
514	/* unlink request */
515	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
516	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
517
518	if (grp->grp_first == req)
519	grp->grp_first = req->grp_next;
520
521	aio_grp_dec (grp);
522	}
523
524	if (SvTRUE (ERRSV))
525	{
526	req_free (req);
527	croak (0);
528	}
529	}	645	}
530		646
531	static void req_free (aio_req req)	647	static void req_destroy (aio_req req)
532	{	648	{
533	if (req->self)	649	if (req->self)
534	{	650	{
535	sv_unmagic (req->self, PERL_MAGIC_ext);	651	sv_unmagic (req->self, PERL_MAGIC_ext);
536	SvREFCNT_dec (req->self);	652	SvREFCNT_dec (req->self);
537	}	653	}
538		654
539	SvREFCNT_dec (req->fh);
540	SvREFCNT_dec (req->sv1);	655	SvREFCNT_dec (req->sv1);
541	SvREFCNT_dec (req->sv2);	656	SvREFCNT_dec (req->sv2);
542	SvREFCNT_dec (req->callback);	657	SvREFCNT_dec (req->callback);
543	Safefree (req->statdata);
544
545	if (req->type == REQ_READDIR)
546	free (req->ptr2);
547		658
548	Safefree (req);	659	Safefree (req);
549	}	660	}
550		661
551	static void req_cancel_subs (aio_req grp)	662	static void req_cancel_subs (aio_req grp)
552	{	663	{
553	aio_req sub;
554
555	if (grp->type != REQ_GROUP)	664	if (grp->type != EIO_GROUP)
556	return;	665	return;
557		666
558	SvREFCNT_dec (grp->sv2);	667	SvREFCNT_dec (grp->sv2);
559	grp->sv2 = 0;	668	grp->sv2 = 0;
560		669
561	for (sub = grp->grp_first; sub; sub = sub->grp_next)	670	eio_grp_cancel (grp);
562	req_cancel (sub);
563	}	671	}
564		672
565	static void req_cancel (aio_req req)	673	static void create_respipe (void)
566	{	674	{
567	req->flags |= FLAG_CANCELLED;	675	if (s_epipe_renew (&respipe))
568		676	croak ("IO::AIO: unable to initialize result pipe");
569	req_cancel_subs (req);
570	}	677	}
571		678
572	static void *aio_proc(void *arg);
573
574	static void start_thread (void)
575	{
576	sigset_t fullsigset, oldsigset;
577	pthread_attr_t attr;
578
579	worker *wrk = calloc (1, sizeof (worker));
580
581	if (!wrk)
582	croak ("unable to allocate worker thread data");
583
584	pthread_attr_init (&attr);
585	pthread_attr_setstacksize (&attr, STACKSIZE);
586	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
587	#ifdef PTHREAD_SCOPE_PROCESS
588	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
589	#endif
590
591	sigfillset (&fullsigset);
592
593	LOCK (wrklock);
594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
595
596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597	{
598	wrk->prev = &wrk_first;
599	wrk->next = wrk_first.next;
600	wrk_first.next->prev = wrk;
601	wrk_first.next = wrk;
602	++started;
603	}
604	else
605	free (wrk);
606
607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
608	UNLOCK (wrklock);
609	}
610
611	static void maybe_start_thread ()
612	{
613	if (get_nthreads () >= wanted)
614	return;
615
616	/* todo: maybe use idle here, but might be less exact */
617	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
618	return;
619
620	start_thread ();
621	}
622
623	static void req_send (aio_req req)
624	{
625	++nreqs;
626
627	LOCK (reqlock);
628	++nready;
629	reqq_push (&req_queue, req);
630	pthread_cond_signal (&reqwait);
631	UNLOCK (reqlock);
632
633	maybe_start_thread ();
634	}
635
636	static void end_thread (void)
637	{
638	aio_req req;
639
640	Newz (0, req, 1, aio_cb);
641
642	req->type = REQ_QUIT;
643	req->pri = PRI_MAX + PRI_BIAS;
644
645	LOCK (reqlock);
646	reqq_push (&req_queue, req);
647	pthread_cond_signal (&reqwait);
648	UNLOCK (reqlock);
649
650	LOCK (wrklock);
651	--started;
652	UNLOCK (wrklock);
653	}
654
655	static void set_max_idle (int nthreads)
656	{
657	if (WORDACCESS_UNSAFE) LOCK (reqlock);
658	max_idle = nthreads <= 0 ? 1 : nthreads;
659	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
660	}
661
662	static void min_parallel (int nthreads)
663	{
664	if (wanted < nthreads)
665	wanted = nthreads;
666	}
667
668	static void max_parallel (int nthreads)
669	{
670	if (wanted > nthreads)
671	wanted = nthreads;
672
673	while (started > wanted)
674	end_thread ();
675	}
676
677	static void poll_wait ()	679	static void poll_wait (void)
678	{	680	{
679	fd_set rfd;
680
681	while (nreqs)	681	while (eio_nreqs ())
682	{	682	{
683	int size;	683	int size;
684	if (WORDACCESS_UNSAFE) LOCK (reslock);	684
		685	X_LOCK (reslock);
685	size = res_queue.size;	686	size = res_queue.size;
686	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	687	X_UNLOCK (reslock);
687		688
688	if (size)	689	if (size)
689	return;	690	return;
690		691
691	maybe_start_thread ();	692	etp_maybe_start_thread ();
692		693
693	FD_ZERO(&rfd);	694	s_epipe_wait (&respipe);
694	FD_SET(respipe [0], &rfd);
695
696	select (respipe [0] + 1, &rfd, 0, 0, 0);
697	}	695	}
698	}	696	}
699		697
700	static int poll_cb ()	698	static int poll_cb (void)
701	{	699	{
702	dSP;
703	int count = 0;
704	int maxreqs = max_poll_reqs;
705	int do_croak = 0;
706	struct timeval tv_start, tv_now;
707	aio_req req;
708
709	if (max_poll_time)
710	gettimeofday (&tv_start, 0);
711
712	for (;;)	700	for (;;)
713	{	701	{
714	for (;;)	702	int res = eio_poll ();
715	{
716	maybe_start_thread ();
717		703
718	LOCK (reslock);	704	if (res > 0)
719	req = reqq_shift (&res_queue);
720
721	if (req)
722	{
723	--npending;
724
725	if (!res_queue.size)
726	{
727	/* read any signals sent by the worker threads */
728	char buf [32];
729	while (read (respipe [0], buf, 32) == 32)
730	;
731	}
732	}
733
734	UNLOCK (reslock);
735
736	if (!req)
737	break;
738
739	--nreqs;
740
741	if (req->type == REQ_GROUP && req->size)
742	{
743	req->int1 = 1; /* mark request as delayed */
744	continue;
745	}
746	else
747	{
748	req_invoke (req);
749
750	count++;
751	}
752
753	req_free (req);
754
755	if (maxreqs && !--maxreqs)
756	break;
757
758	if (max_poll_time)
759	{
760	gettimeofday (&tv_now, 0);
761
762	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
763	break;
764	}
765	}
766
767	if (nreqs <= max_outstanding)
768	break;	705	croak (0);
		706
		707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
769		709
770	poll_wait ();	710	poll_wait ();
771
772	++maxreqs;
773	}	711	}
774
775	return count;
776	}	712	}
777		713
778	static void create_pipe ()	714	static void ecb_cold
		715	atfork_child (void)
779	{	716	{
780	if (pipe (respipe))	717	create_respipe ();
781	croak ("unable to initialize result pipe");
782		718
783	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	719	if (eio_init (want_poll, done_poll) < 0)
784	croak ("cannot set result pipe to nonblocking mode");	720	croak ("IO::AIO: unable to initialise eio library");
785
786	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
787	croak ("cannot set result pipe to nonblocking mode");
788	}	721	}
789		722
790	/*****************************************************************************/	723	/*****************************************************************************/
791	/* work around various missing functions */
792		724
793	#if !HAVE_PREADWRITE	725	#if !_POSIX_MAPPED_FILES
794	# define pread aio_pread	726	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
795	# define pwrite aio_pwrite	727	# define munmap(addr,length) (errno = ENOSYS, -1)
796
797	/*
798	* make our pread/pwrite safe against themselves, but not against
799	* normal read/write by using a mutex. slows down execution a lot,
800	* but that's your problem, not mine.
801	*/
802	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
803
804	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
805	{
806	ssize_t res;
807	off_t ooffset;
808
809	LOCK (preadwritelock);
810	ooffset = lseek (fd, 0, SEEK_CUR);
811	lseek (fd, offset, SEEK_SET);
812	res = read (fd, buf, count);
813	lseek (fd, ooffset, SEEK_SET);
814	UNLOCK (preadwritelock);
815
816	return res;
817	}
818
819	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
820	{
821	ssize_t res;
822	off_t ooffset;
823
824	LOCK (preadwritelock);
825	ooffset = lseek (fd, 0, SEEK_CUR);
826	lseek (fd, offset, SEEK_SET);
827	res = write (fd, buf, count);
828	lseek (fd, offset, SEEK_SET);
829	UNLOCK (preadwritelock);
830
831	return res;
832	}
833	#endif
834
835	#if !HAVE_FDATASYNC
836	# define fdatasync fsync
837	#endif
838
839	#if !HAVE_READAHEAD
840	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
841
842	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
843	{
844	dBUF;
845
846	while (count > 0)
847	{
848	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
849
850	pread (fd, aio_buf, len, offset);
851	offset += len;
852	count -= len;
853	}
854
855	errno = 0;
856	}
857
858	#endif
859
860	#if !HAVE_READDIR_R
861	# define readdir_r aio_readdir_r
862
863	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
864
865	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
866	{
867	struct dirent *e;
868	int errorno;
869
870	LOCK (readdirlock);
871
872	e = readdir (dirp);
873	errorno = errno;
874
875	if (e)
876	{
877	*res = ent;
878	strcpy (ent->d_name, e->d_name);
879	}
880	else
881	*res = 0;
882
883	UNLOCK (readdirlock);
884
885	errno = errorno;
886	return e ? 0 : -1;
887	}
888	#endif
889
890	/* sendfile always needs emulation */
891	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
892	{
893	ssize_t res;
894
895	if (!count)
896	return 0;
897
898	#if HAVE_SENDFILE
899	# if __linux
900	res = sendfile (ofd, ifd, &offset, count);
901
902	# elif __freebsd
903	/*
904	* Of course, the freebsd sendfile is a dire hack with no thoughts
905	* wasted on making it similar to other I/O functions.
906	*/
907	{
908	off_t sbytes;
909	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
910
911	if (res < 0 && sbytes)
912	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
913	res = sbytes;
914	}
915
916	# elif __hpux
917	res = sendfile (ofd, ifd, offset, count, 0, 0);
918
919	# elif __solaris
920	{
921	struct sendfilevec vec;
922	size_t sbytes;
923
924	vec.sfv_fd = ifd;
925	vec.sfv_flag = 0;
926	vec.sfv_off = offset;
927	vec.sfv_len = count;
928
929	res = sendfilev (ofd, &vec, 1, &sbytes);
930
931	if (res < 0 && sbytes)
932	res = sbytes;
933	}
934
935	# endif	728	#endif
936	#else
937	res = -1;
938	errno = ENOSYS;
939	#endif
940		729
941	if (res < 0	730	#if !_POSIX_MEMORY_PROTECTION
942	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	731	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
943	#if __solaris	732	# define PROT_NONE 0
944	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	733	# define PROT_WRITE 0
		734	# define MAP_PRIVATE 0
		735	# define MAP_SHARED 0
		736	# define MAP_FIXED 0
945	#endif	737	#endif
946	)
947	)
948	{
949	/* emulate sendfile. this is a major pain in the ass */
950	dBUF;
951		738
952	res = 0;	739	#define MMAP_MAGIC PERL_MAGIC_ext
953		740
954	while (count)	741	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
955	{	742	{
956	ssize_t cnt;	743	int old_errno = errno;
957		744	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
958	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);	745	errno = old_errno;
959		746
960	if (cnt <= 0)	747	mg->mg_obj = 0; /* just in case */
961	{
962	if (cnt && !res) res = -1;
963	break;
964	}
965		748
966	cnt = write (ofd, aio_buf, cnt);	749	SvREADONLY_off (sv);
967		750
968	if (cnt <= 0)	751	if (SvPVX (sv) != mg->mg_ptr)
969	{	752	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
970	if (cnt && !res) res = -1;
971	break;
972	}
973		753
974	offset += cnt;	754	SvCUR_set (sv, 0);
975	res += cnt;	755	SvPVX (sv) = 0;
976	count -= cnt;	756	SvOK_off (sv);
977	}
978	}
979		757
980	return res;	758	return 0;
981	}	759	}
982		760
983	/* read a full directory */	761	static MGVTBL mmap_vtbl = {
984	static void scandir_ (aio_req req, worker *self)	762	0, 0, 0, 0, mmap_free
985	{	763	};
986	DIR *dirp;
987	union
988	{
989	struct dirent d;
990	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
991	} *u;
992	struct dirent *entp;
993	char *name, *names;
994	int memlen = 4096;
995	int memofs = 0;
996	int res = 0;
997	int errorno;
998
999	LOCK (wrklock);
1000	self->dirp = dirp = opendir (req->ptr1);
1001	self->dbuf = u = malloc (sizeof (*u));
1002	req->ptr2 = names = malloc (memlen);
1003	UNLOCK (wrklock);
1004
1005	if (dirp && u && names)
1006	for (;;)
1007	{
1008	errno = 0;
1009	readdir_r (dirp, &u->d, &entp);
1010
1011	if (!entp)
1012	break;
1013
1014	name = entp->d_name;
1015
1016	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1017	{
1018	int len = strlen (name) + 1;
1019
1020	res++;
1021
1022	while (memofs + len > memlen)
1023	{
1024	memlen *= 2;
1025	LOCK (wrklock);
1026	req->ptr2 = names = realloc (names, memlen);
1027	UNLOCK (wrklock);
1028
1029	if (!names)
1030	break;
1031	}
1032
1033	memcpy (names + memofs, name, len);
1034	memofs += len;
1035	}
1036	}
1037
1038	if (errno)
1039	res = -1;
1040
1041	req->result = res;
1042	}
1043		764
1044	/*****************************************************************************/	765	/*****************************************************************************/
1045		766
1046	static void *aio_proc (void *thr_arg)	767	static SV * get_cb (SV *cb_sv)
1047	{	768	{
1048	aio_req req;	769	SvGETMAGIC (cb_sv);
1049	struct timespec ts;	770	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1050	worker *self = (worker *)thr_arg;
1051
1052	/* try to distribute timeouts somewhat evenly */
1053	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1054	* (1000000000UL / 1024UL);
1055
1056	for (;;)
1057	{
1058	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1059
1060	LOCK (reqlock);
1061
1062	for (;;)
1063	{
1064	self->req = req = reqq_shift (&req_queue);
1065
1066	if (req)
1067	break;
1068
1069	++idle;
1070
1071	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1072	== ETIMEDOUT)
1073	{
1074	if (idle > max_idle)
1075	{
1076	--idle;
1077	UNLOCK (reqlock);
1078	LOCK (wrklock);
1079	--started;
1080	UNLOCK (wrklock);
1081	goto quit;
1082	}
1083
1084	/* we are allowed to idle, so do so without any timeout */
1085	pthread_cond_wait (&reqwait, &reqlock);
1086	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1087	}
1088
1089	--idle;
1090	}
1091
1092	--nready;
1093
1094	UNLOCK (reqlock);
1095
1096	errno = 0; /* strictly unnecessary */
1097
1098	if (!(req->flags & FLAG_CANCELLED))
1099	switch (req->type)
1100	{
1101	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1102	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1103
1104	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1105	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1106
1107	case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
1108	case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
1109	case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
1110
1111	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1112	case REQ_CLOSE: req->result = close (req->int1); break;
1113	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1114	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1115	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1116	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1117	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1118	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1119	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1120
1121	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1122	case REQ_FSYNC: req->result = fsync (req->int1); break;
1123	case REQ_READDIR: scandir_ (req, self); break;
1124
1125	case REQ_BUSY:
1126	{
1127	struct timeval tv;
1128
1129	tv.tv_sec = req->int1;
1130	tv.tv_usec = req->int2;
1131
1132	req->result = select (0, 0, 0, 0, &tv);
1133	}
1134
1135	case REQ_GROUP:
1136	case REQ_NOP:
1137	break;
1138
1139	case REQ_QUIT:
1140	goto quit;
1141
1142	default:
1143	req->result = ENOSYS;
1144	break;
1145	}
1146
1147	req->errorno = errno;
1148
1149	LOCK (reslock);
1150
1151	++npending;
1152
1153	if (!reqq_push (&res_queue, req))
1154	/* write a dummy byte to the pipe so fh becomes ready */
1155	write (respipe [1], &respipe, 1);
1156
1157	self->req = 0;
1158	worker_clear (self);
1159
1160	UNLOCK (reslock);
1161	}
1162
1163	quit:
1164	LOCK (wrklock);
1165	worker_free (self);
1166	UNLOCK (wrklock);
1167
1168	return 0;
1169	}
1170
1171	/*****************************************************************************/
1172
1173	static void atfork_prepare (void)
1174	{
1175	LOCK (wrklock);
1176	LOCK (reqlock);
1177	LOCK (reslock);
1178	#if !HAVE_PREADWRITE
1179	LOCK (preadwritelock);
1180	#endif
1181	#if !HAVE_READDIR_R
1182	LOCK (readdirlock);
1183	#endif
1184	}
1185
1186	static void atfork_parent (void)
1187	{
1188	#if !HAVE_READDIR_R
1189	UNLOCK (readdirlock);
1190	#endif
1191	#if !HAVE_PREADWRITE
1192	UNLOCK (preadwritelock);
1193	#endif
1194	UNLOCK (reslock);
1195	UNLOCK (reqlock);
1196	UNLOCK (wrklock);
1197	}
1198
1199	static void atfork_child (void)
1200	{
1201	aio_req prv;
1202
1203	while (prv = reqq_shift (&req_queue))
1204	req_free (prv);
1205
1206	while (prv = reqq_shift (&res_queue))
1207	req_free (prv);
1208
1209	while (wrk_first.next != &wrk_first)
1210	{
1211	worker *wrk = wrk_first.next;
1212
1213	if (wrk->req)
1214	req_free (wrk->req);
1215
1216	worker_clear (wrk);
1217	worker_free (wrk);
1218	}
1219
1220	started = 0;
1221	idle = 0;
1222	nreqs = 0;
1223	nready = 0;
1224	npending = 0;
1225
1226	close (respipe [0]);
1227	close (respipe [1]);
1228	create_pipe ();
1229
1230	atfork_parent ();
1231	}	771	}
1232		772
1233	#define dREQ \	773	#define dREQ \
		774	SV *cb_cv; \
1234	aio_req req; \	775	aio_req req; \
1235	int req_pri = next_pri; \	776	int req_pri = next_pri; \
1236	next_pri = DEFAULT_PRI + PRI_BIAS; \	777	next_pri = EIO_PRI_DEFAULT; \
1237	\	778	\
1238	if (SvOK (callback) && !SvROK (callback)) \	779	cb_cv = get_cb (callback); \
1239	croak ("callback must be undef or of reference type"); \
1240	\	780	\
1241	Newz (0, req, 1, aio_cb); \	781	Newz (0, req, 1, eio_req); \
1242	if (!req) \	782	if (!req) \
1243	croak ("out of memory during aio_req allocation"); \	783	croak ("out of memory during eio_req allocation"); \
1244	\	784	\
1245	req->callback = newSVsv (callback); \	785	req->callback = SvREFCNT_inc (cb_cv); \
1246	req->pri = req_pri	786	req->pri = req_pri
1247		787
1248	#define REQ_SEND \	788	#define REQ_SEND \
		789	PUTBACK; \
1249	req_send (req); \	790	req_submit (req); \
		791	SPAGAIN; \
1250	\	792	\
1251	if (GIMME_V != G_VOID) \	793	if (GIMME_V != G_VOID) \
1252	XPUSHs (req_sv (req, AIO_REQ_KLASS));	794	XPUSHs (req_sv (req, aio_req_stash));
1253		795
1254	MODULE = IO::AIO PACKAGE = IO::AIO	796	MODULE = IO::AIO PACKAGE = IO::AIO
1255		797
1256	PROTOTYPES: ENABLE	798	PROTOTYPES: ENABLE
1257		799
1258	BOOT:	800	BOOT:
1259	{	801	{
		802	static const struct {
		803	const char *name;
		804	IV iv;
		805	} *civ, const_iv[] = {
		806	# define const_niv(name, value) { # name, (IV) value },
		807	# define const_iv(name) { # name, (IV) name },
		808	# define const_eio(name) { # name, (IV) EIO_ ## name },
		809	const_iv (EXDEV)
		810	const_iv (ENOSYS)
		811	const_iv (O_RDONLY)
		812	const_iv (O_WRONLY)
		813	const_iv (O_RDWR)
		814	const_iv (O_CREAT)
		815	const_iv (O_TRUNC)
		816	const_iv (O_EXCL)
		817	const_iv (O_APPEND)
		818
		819	const_iv (O_ASYNC)
		820	const_iv (O_DIRECT)
		821	const_iv (O_NOATIME)
		822
		823	const_iv (O_CLOEXEC)
		824	const_iv (O_NOCTTY)
		825	const_iv (O_NOFOLLOW)
		826	const_iv (O_NONBLOCK)
		827	const_iv (O_EXEC)
		828	const_iv (O_SEARCH)
		829	const_iv (O_DIRECTORY)
		830	const_iv (O_DSYNC)
		831	const_iv (O_RSYNC)
		832	const_iv (O_SYNC)
		833	const_iv (O_TTY_INIT)
		834
		835	const_iv (S_IFIFO)
		836	const_iv (S_IFCHR)
		837	const_iv (S_IFBLK)
		838	const_iv (S_IFLNK)
		839	const_iv (S_IFREG)
		840	const_iv (S_IFDIR)
		841	const_iv (S_IFWHT)
		842	const_iv (S_IFSOCK)
		843	const_iv (S_IFMT)
		844
		845	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		846	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		847	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		848	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		849	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		850	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		851
		852	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		853	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		854	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		855	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		856	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		857
		858	const_iv (ST_RDONLY)
		859	const_iv (ST_NOSUID)
		860	const_iv (ST_NODEV)
		861	const_iv (ST_NOEXEC)
		862	const_iv (ST_SYNCHRONOUS)
		863	const_iv (ST_MANDLOCK)
		864	const_iv (ST_WRITE)
		865	const_iv (ST_APPEND)
		866	const_iv (ST_IMMUTABLE)
		867	const_iv (ST_NOATIME)
		868	const_iv (ST_NODIRATIME)
		869	const_iv (ST_RELATIME)
		870
		871	const_iv (PROT_NONE)
		872	const_iv (PROT_EXEC)
		873	const_iv (PROT_READ)
		874	const_iv (PROT_WRITE)
		875
		876	/*const_iv (MAP_FIXED)*/
		877	const_iv (MAP_PRIVATE)
		878	const_iv (MAP_SHARED)
		879	const_iv (MAP_ANONYMOUS)
		880
		881	/* linuxish */
		882	const_iv (MAP_HUGETLB)
		883	const_iv (MAP_LOCKED)
		884	const_iv (MAP_NORESERVE)
		885	const_iv (MAP_POPULATE)
		886	const_iv (MAP_NONBLOCK)
		887
		888	const_eio (MCL_FUTURE)
		889	const_eio (MCL_CURRENT)
		890
		891	const_eio (MS_ASYNC)
		892	const_eio (MS_INVALIDATE)
		893	const_eio (MS_SYNC)
		894
		895	const_eio (MT_MODIFY)
		896
		897	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		898	const_eio (SYNC_FILE_RANGE_WRITE)
		899	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		900
		901	const_eio (FALLOC_FL_KEEP_SIZE)
		902
		903	const_eio (READDIR_DENTS)
		904	const_eio (READDIR_DIRS_FIRST)
		905	const_eio (READDIR_STAT_ORDER)
		906	const_eio (READDIR_FOUND_UNKNOWN)
		907
		908	const_eio (DT_UNKNOWN)
		909	const_eio (DT_FIFO)
		910	const_eio (DT_CHR)
		911	const_eio (DT_DIR)
		912	const_eio (DT_BLK)
		913	const_eio (DT_REG)
		914	const_eio (DT_LNK)
		915	const_eio (DT_SOCK)
		916	const_eio (DT_WHT)
		917	};
		918
1260	HV *stash = gv_stashpv ("IO::AIO", 1);	919	aio_stash = gv_stashpv ("IO::AIO" , 1);
		920	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		921	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1261		922
1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	923	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	924	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1264	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1265	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1266	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1267	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1268		925
1269	create_pipe ();	926	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1271	}
1272		927
		928	X_THREAD_ATFORK (0, 0, atfork_child);
		929	atfork_child (); /* calls create_respipe and eio_init */
		930	}
		931
1273	void	932	void
1274	max_poll_reqs (int nreqs)	933	max_poll_reqs (unsigned int nreqs)
1275	PROTOTYPE: $	934	PROTOTYPE: $
1276	CODE:	935	CODE:
1277	max_poll_reqs = nreqs;	936	eio_set_max_poll_reqs (nreqs);
1278		937
1279	void	938	void
1280	max_poll_time (double nseconds)	939	max_poll_time (double nseconds)
1281	PROTOTYPE: $	940	PROTOTYPE: $
1282	CODE:	941	CODE:
1283	max_poll_time = nseconds * AIO_TICKS;	942	eio_set_max_poll_time (nseconds);
1284		943
1285	void	944	void
1286	min_parallel (int nthreads)	945	min_parallel (unsigned int nthreads)
1287	PROTOTYPE: $
1288
1289	void
1290	max_parallel (int nthreads)
1291	PROTOTYPE: $
1292
1293	void
1294	max_idle (int nthreads)
1295	PROTOTYPE: $	946	PROTOTYPE: $
1296	CODE:	947	CODE:
1297	set_max_idle (nthreads);	948	eio_set_min_parallel (nthreads);
1298		949
1299	int	950	void
1300	max_outstanding (int maxreqs)	951	max_parallel (unsigned int nthreads)
1301	PROTOTYPE: $	952	PROTOTYPE: $
1302	CODE:	953	CODE:
1303	RETVAL = max_outstanding;	954	eio_set_max_parallel (nthreads);
		955
		956	void
		957	max_idle (unsigned int nthreads)
		958	PROTOTYPE: $
		959	CODE:
		960	eio_set_max_idle (nthreads);
		961
		962	void
		963	idle_timeout (unsigned int seconds)
		964	PROTOTYPE: $
		965	CODE:
		966	eio_set_idle_timeout (seconds);
		967
		968	void
		969	max_outstanding (unsigned int maxreqs)
		970	PROTOTYPE: $
		971	CODE:
1304	max_outstanding = maxreqs;	972	max_outstanding = maxreqs;
1305	OUTPUT:
1306	RETVAL
1307		973
1308	void	974	void
1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	975	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1310	SV * pathname
1311	int flags
1312	int mode
1313	SV * callback
1314	PROTOTYPE: $$$;$
1315	PPCODE:	976	PPCODE:
1316	{	977	{
1317	dREQ;	978	dREQ;
1318		979
1319	req->type = REQ_OPEN;	980	req->type = EIO_OPEN;
1320	req->sv1 = newSVsv (pathname);	981	req->sv1 = newSVsv (pathname);
1321	req->ptr1 = SvPVbyte_nolen (pathname);	982	req->ptr1 = SvPVbyte_nolen (req->sv1);
1322	req->int1 = flags;	983	req->int1 = flags;
1323	req->mode = mode;	984	req->int2 = mode;
1324		985
1325	REQ_SEND;	986	REQ_SEND;
1326	}	987	}
1327		988
1328	void	989	void
1329	aio_close (fh,callback=&PL_sv_undef)	990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1330	SV * fh
1331	SV * callback
1332	PROTOTYPE: $;$
1333	ALIAS:	991	ALIAS:
1334	aio_close = REQ_CLOSE
1335	aio_fsync = REQ_FSYNC	992	aio_fsync = EIO_FSYNC
1336	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = EIO_FDATASYNC
1337	PPCODE:	994	PPCODE:
1338	{	995	{
		996	int fd = s_fileno_croak (fh, 0);
1339	dREQ;	997	dREQ;
1340		998
1341	req->type = ix;	999	req->type = ix;
1342	req->fh = newSVsv (fh);	1000	req->sv1 = newSVsv (fh);
1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1001	req->int1 = fd;
1344		1002
1345	REQ_SEND (req);	1003	REQ_SEND (req);
1346	}	1004	}
1347		1005
1348	void	1006	void
		1007	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1008	PPCODE:
		1009	{
		1010	int fd = s_fileno_croak (fh, 0);
		1011	dREQ;
		1012
		1013	req->type = EIO_SYNC_FILE_RANGE;
		1014	req->sv1 = newSVsv (fh);
		1015	req->int1 = fd;
		1016	req->offs = offset;
		1017	req->size = nbytes;
		1018	req->int2 = flags;
		1019
		1020	REQ_SEND (req);
		1021	}
		1022
		1023	void
		1024	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1025	PPCODE:
		1026	{
		1027	int fd = s_fileno_croak (fh, 0);
		1028	dREQ;
		1029
		1030	req->type = EIO_FALLOCATE;
		1031	req->sv1 = newSVsv (fh);
		1032	req->int1 = fd;
		1033	req->int2 = mode;
		1034	req->offs = offset;
		1035	req->size = len;
		1036
		1037	REQ_SEND (req);
		1038	}
		1039
		1040	void
		1041	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1042	PPCODE:
		1043	{
		1044	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1045	int fd = s_fileno_croak (fh, 0);
		1046	dREQ;
		1047
		1048	if (expect_false (close_fd < 0))
		1049	{
		1050	int pipefd [2];
		1051
		1052	if (
		1053	#ifdef _WIN32
		1054	_pipe (pipefd, 1, _O_BINARY) < 0
		1055	#else
		1056	pipe (pipefd) < 0
		1057	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1058	#endif
		1059	|| close (pipefd [1]) < 0
		1060	)
		1061	abort (); /*D*/
		1062
		1063	close_fd = pipefd [0];
		1064	}
		1065
		1066	req->type = EIO_DUP2;
		1067	req->int1 = close_fd;
		1068	req->sv2 = newSVsv (fh);
		1069	req->int2 = fd;
		1070
		1071	REQ_SEND (req);
		1072	}
		1073
		1074	void
1349	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1075	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1350	SV * fh
1351	UV offset
1352	UV length
1353	SV * data
1354	UV dataoffset
1355	SV * callback
1356	ALIAS:	1076	ALIAS:
1357	aio_read = REQ_READ	1077	aio_read = EIO_READ
1358	aio_write = REQ_WRITE	1078	aio_write = EIO_WRITE
1359	PROTOTYPE: $$$$$;$
1360	PPCODE:	1079	PPCODE:
1361	{	1080	{
1362	STRLEN svlen;	1081	STRLEN svlen;
		1082	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1363	char *svptr = SvPVbyte (data, svlen);	1083	char *svptr = SvPVbyte (data, svlen);
1364		1084	UV len = SvUV (length);
1365	SvUPGRADE (data, SVt_PV);
1366	SvPOK_on (data);
1367		1085
1368	if (dataoffset < 0)	1086	if (dataoffset < 0)
1369	dataoffset += svlen;	1087	dataoffset += svlen;
1370		1088
1371	if (dataoffset < 0 || dataoffset > svlen)	1089	if (dataoffset < 0 || dataoffset > svlen)
1372	croak ("data offset outside of string");	1090	croak ("dataoffset outside of data scalar");
1373		1091
1374	if (ix == REQ_WRITE)	1092	if (ix == EIO_WRITE)
1375	{	1093	{
1376	/* write: check length and adjust. */	1094	/* write: check length and adjust. */
1377	if (length < 0 || length + dataoffset > svlen)	1095	if (!SvOK (length) || len + dataoffset > svlen)
1378	length = svlen - dataoffset;	1096	len = svlen - dataoffset;
1379	}	1097	}
1380	else	1098	else
1381	{	1099	{
1382	/* read: grow scalar as necessary */	1100	/* read: check type and grow scalar as necessary */
		1101	SvUPGRADE (data, SVt_PV);
1383	svptr = SvGROW (data, length + dataoffset);	1102	svptr = SvGROW (data, len + dataoffset + 1);
1384	}	1103	}
1385
1386	if (length < 0)
1387	croak ("length must not be negative");
1388		1104
1389	{	1105	{
1390	dREQ;	1106	dREQ;
1391		1107
1392	req->type = ix;	1108	req->type = ix;
1393	req->fh = newSVsv (fh);	1109	req->sv1 = newSVsv (fh);
1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1110	req->int1 = fd;
1395	: IoOFP (sv_2io (fh)));	1111	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1396	req->offs = offset;
1397	req->size = length;	1112	req->size = len;
1398	req->sv1 = SvREFCNT_inc (data);	1113	req->sv2 = SvREFCNT_inc (data);
1399	req->ptr1 = (char *)svptr + dataoffset;	1114	req->ptr2 = (char *)svptr + dataoffset;
1400	req->stroffset = dataoffset;	1115	req->stroffset = dataoffset;
1401		1116
1402	if (!SvREADONLY (data))	1117	if (!SvREADONLY (data))
1403	{	1118	{
1404	SvREADONLY_on (data);	1119	SvREADONLY_on (data);
1405	req->flags |= FLAG_DATA_RO_OFF;	1120	req->flags |= FLAG_SV2_RO_OFF;
1406	}	1121	}
1407		1122
1408	REQ_SEND;	1123	REQ_SEND;
1409	}	1124	}
1410	}	1125	}
1411		1126
1412	void	1127	void
1413	aio_readlink (path,callback=&PL_sv_undef)	1128	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1414	SV * path	1129	ALIAS:
1415	SV * callback	1130	aio_readlink = EIO_READLINK
1416	PROTOTYPE: $$;$	1131	aio_realpath = EIO_REALPATH
1417	PPCODE:	1132	PPCODE:
1418	{	1133	{
1419	SV *data;
1420	dREQ;	1134	dREQ;
1421		1135
1422	data = newSV (NAME_MAX);
1423	SvPOK_on (data);
1424
1425	req->type = REQ_READLINK;	1136	req->type = ix;
1426	req->fh = newSVsv (path);	1137	req->sv1 = newSVsv (path);
1427	req->ptr2 = SvPVbyte_nolen (path);
1428	req->sv1 = data;
1429	req->ptr1 = SvPVbyte_nolen (data);	1138	req->ptr1 = SvPVbyte_nolen (req->sv1);
1430		1139
1431	REQ_SEND;	1140	REQ_SEND;
1432	}	1141	}
1433		1142
1434	void	1143	void
1435	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1144	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1436	SV * out_fh
1437	SV * in_fh
1438	UV in_offset
1439	UV length
1440	SV * callback
1441	PROTOTYPE: $$$$;$
1442	PPCODE:	1145	PPCODE:
1443	{	1146	{
		1147	int ifd = s_fileno_croak (in_fh , 0);
		1148	int ofd = s_fileno_croak (out_fh, 1);
1444	dREQ;	1149	dREQ;
1445		1150
1446	req->type = REQ_SENDFILE;	1151	req->type = EIO_SENDFILE;
1447	req->fh = newSVsv (out_fh);	1152	req->sv1 = newSVsv (out_fh);
1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1153	req->int1 = ofd;
1449	req->sv2 = newSVsv (in_fh);	1154	req->sv2 = newSVsv (in_fh);
1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1155	req->int2 = ifd;
1451	req->offs = in_offset;	1156	req->offs = in_offset;
1452	req->size = length;	1157	req->size = length;
1453		1158
1454	REQ_SEND;	1159	REQ_SEND;
1455	}	1160	}
1456		1161
1457	void	1162	void
1458	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1163	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1459	SV * fh
1460	UV offset
1461	IV length
1462	SV * callback
1463	PROTOTYPE: $$$;$
1464	PPCODE:	1164	PPCODE:
1465	{	1165	{
		1166	int fd = s_fileno_croak (fh, 0);
1466	dREQ;	1167	dREQ;
1467		1168
1468	req->type = REQ_READAHEAD;	1169	req->type = EIO_READAHEAD;
1469	req->fh = newSVsv (fh);	1170	req->sv1 = newSVsv (fh);
1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1171	req->int1 = fd;
1471	req->offs = offset;	1172	req->offs = offset;
1472	req->size = length;	1173	req->size = length;
1473		1174
1474	REQ_SEND;	1175	REQ_SEND;
1475	}	1176	}
1476		1177
1477	void	1178	void
1478	aio_stat (fh_or_path,callback=&PL_sv_undef)	1179	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1479	SV * fh_or_path
1480	SV * callback
1481	ALIAS:	1180	ALIAS:
1482	aio_stat = REQ_STAT	1181	aio_stat = EIO_STAT
1483	aio_lstat = REQ_LSTAT	1182	aio_lstat = EIO_LSTAT
		1183	aio_statvfs = EIO_STATVFS
1484	PPCODE:	1184	PPCODE:
1485	{	1185	{
1486	dREQ;	1186	dREQ;
1487		1187
1488	New (0, req->statdata, 1, Stat_t);	1188	req->sv1 = newSVsv (fh_or_path);
1489	if (!req->statdata)
1490	{
1491	req_free (req);
1492	croak ("out of memory during aio_req->statdata allocation");
1493	}
1494		1189
1495	if (SvPOK (fh_or_path))	1190	if (SvPOK (req->sv1))
1496	{	1191	{
1497	req->type = ix;	1192	req->type = ix;
1498	req->sv1 = newSVsv (fh_or_path);
1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);	1193	req->ptr1 = SvPVbyte_nolen (req->sv1);
1500	}	1194	}
1501	else	1195	else
1502	{	1196	{
1503	req->type = REQ_FSTAT;	1197	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1504	req->fh = newSVsv (fh_or_path);
1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1198	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1506	}	1199	}
1507		1200
1508	REQ_SEND;	1201	REQ_SEND;
1509	}	1202	}
1510		1203
		1204	UV
		1205	major (UV dev)
		1206	ALIAS:
		1207	minor = 1
		1208	CODE:
		1209	RETVAL = ix ? major (dev) : minor (dev);
		1210	OUTPUT:
		1211	RETVAL
		1212
		1213	UV
		1214	makedev (UV maj, UV min)
		1215	CODE:
		1216	RETVAL = makedev (maj, min);
		1217	OUTPUT:
		1218	RETVAL
		1219
1511	void	1220	void
		1221	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1227	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1228	req->sv1 = newSVsv (fh_or_path);
		1229
		1230	if (SvPOK (req->sv1))
		1231	{
		1232	req->type = EIO_UTIME;
		1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	}
		1235	else
		1236	{
		1237	req->type = EIO_FUTIME;
		1238	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1239	}
		1240
		1241	REQ_SEND;
		1242	}
		1243
		1244	void
		1245	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1246	PPCODE:
		1247	{
		1248	dREQ;
		1249
		1250	req->sv1 = newSVsv (fh_or_path);
		1251	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1252
		1253	if (SvPOK (req->sv1))
		1254	{
		1255	req->type = EIO_TRUNCATE;
		1256	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1257	}
		1258	else
		1259	{
		1260	req->type = EIO_FTRUNCATE;
		1261	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1262	}
		1263
		1264	REQ_SEND;
		1265	}
		1266
		1267	void
		1268	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1269	ALIAS:
		1270	aio_chmod = EIO_CHMOD
		1271	aio_mkdir = EIO_MKDIR
		1272	PPCODE:
		1273	{
		1274	dREQ;
		1275
		1276	req->int2 = mode;
		1277	req->sv1 = newSVsv (fh_or_path);
		1278
		1279	if (SvPOK (req->sv1))
		1280	{
		1281	req->type = ix;
		1282	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1283	}
		1284	else
		1285	{
		1286	req->type = EIO_FCHMOD;
		1287	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1288	}
		1289
		1290	REQ_SEND;
		1291	}
		1292
		1293	void
		1294	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1300	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1301	req->sv1 = newSVsv (fh_or_path);
		1302
		1303	if (SvPOK (req->sv1))
		1304	{
		1305	req->type = EIO_CHOWN;
		1306	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1307	}
		1308	else
		1309	{
		1310	req->type = EIO_FCHOWN;
		1311	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1312	}
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	void
		1318	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1319	PPCODE:
		1320	{
		1321	dREQ;
		1322
		1323	req->type = EIO_READDIR;
		1324	req->sv1 = newSVsv (pathname);
		1325	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1326	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1327
		1328	if (flags & EIO_READDIR_DENTS)
		1329	req->int1 |= EIO_READDIR_CUSTOM2;
		1330
		1331	REQ_SEND;
		1332	}
		1333
		1334	void
1512	aio_unlink (pathname,callback=&PL_sv_undef)	1335	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1513	SV * pathname
1514	SV * callback
1515	ALIAS:	1336	ALIAS:
1516	aio_unlink = REQ_UNLINK	1337	aio_unlink = EIO_UNLINK
1517	aio_rmdir = REQ_RMDIR	1338	aio_rmdir = EIO_RMDIR
1518	aio_readdir = REQ_READDIR	1339	aio_readdir = EIO_READDIR
1519	PPCODE:	1340	PPCODE:
1520	{	1341	{
1521	dREQ;	1342	dREQ;
1522		1343
1523	req->type = ix;	1344	req->type = ix;
1524	req->sv1 = newSVsv (pathname);	1345	req->sv1 = newSVsv (pathname);
1525	req->ptr1 = SvPVbyte_nolen (pathname);	1346	req->ptr1 = SvPVbyte_nolen (req->sv1);
1526		1347
1527	REQ_SEND;	1348	REQ_SEND;
1528	}	1349	}
1529		1350
1530	void	1351	void
1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1352	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1532	SV * oldpath
1533	SV * newpath
1534	SV * callback
1535	ALIAS:	1353	ALIAS:
1536	aio_link = REQ_LINK	1354	aio_link = EIO_LINK
1537	aio_symlink = REQ_SYMLINK	1355	aio_symlink = EIO_SYMLINK
1538	aio_rename = REQ_RENAME	1356	aio_rename = EIO_RENAME
1539	PPCODE:	1357	PPCODE:
1540	{	1358	{
1541	dREQ;	1359	dREQ;
1542		1360
1543	req->type = ix;	1361	req->type = ix;
1544	req->fh = newSVsv (oldpath);	1362	req->sv1 = newSVsv (oldpath);
1545	req->ptr2 = SvPVbyte_nolen (req->fh);	1363	req->ptr1 = SvPVbyte_nolen (req->sv1);
1546	req->sv1 = newSVsv (newpath);	1364	req->sv2 = newSVsv (newpath);
1547	req->ptr1 = SvPVbyte_nolen (newpath);	1365	req->ptr2 = SvPVbyte_nolen (req->sv2);
1548		1366
1549	REQ_SEND;	1367	REQ_SEND;
1550	}	1368	}
1551		1369
1552	void	1370	void
1553	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1371	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1554	SV * pathname
1555	SV * callback
1556	UV mode
1557	UV dev
1558	PPCODE:	1372	PPCODE:
1559	{	1373	{
1560	dREQ;	1374	dREQ;
1561		1375
1562	req->type = REQ_MKNOD;	1376	req->type = EIO_MKNOD;
1563	req->sv1 = newSVsv (pathname);	1377	req->sv1 = newSVsv (pathname);
1564	req->ptr1 = SvPVbyte_nolen (pathname);	1378	req->ptr1 = SvPVbyte_nolen (req->sv1);
1565	req->mode = (mode_t)mode;	1379	req->int2 = (mode_t)mode;
1566	req->offs = dev;	1380	req->offs = dev;
1567		1381
1568	REQ_SEND;	1382	REQ_SEND;
1569	}	1383	}
1570		1384
1571	void	1385	void
		1386	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1387	ALIAS:
		1388	aio_mtouch = EIO_MTOUCH
		1389	aio_msync = EIO_MSYNC
		1390	PPCODE:
		1391	{
		1392	STRLEN svlen;
		1393	char *svptr = SvPVbyte (data, svlen);
		1394	UV len = SvUV (length);
		1395
		1396	if (offset < 0)
		1397	offset += svlen;
		1398
		1399	if (offset < 0 || offset > svlen)
		1400	croak ("offset outside of scalar");
		1401
		1402	if (!SvOK (length) || len + offset > svlen)
		1403	len = svlen - offset;
		1404
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req->sv2 = SvREFCNT_inc (data);
		1410	req->ptr2 = (char *)svptr + offset;
		1411	req->size = len;
		1412	req->int1 = flags;
		1413
		1414	REQ_SEND;
		1415	}
		1416	}
		1417
		1418	void
		1419	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	STRLEN svlen;
		1423	char *svptr = SvPVbyte (data, svlen);
		1424	UV len = SvUV (length);
		1425
		1426	if (offset < 0)
		1427	offset += svlen;
		1428
		1429	if (offset < 0 || offset > svlen)
		1430	croak ("offset outside of scalar");
		1431
		1432	if (!SvOK (length) || len + offset > svlen)
		1433	len = svlen - offset;
		1434
		1435	{
		1436	dREQ;
		1437
		1438	req->type = EIO_MLOCK;
		1439	req->sv2 = SvREFCNT_inc (data);
		1440	req->ptr2 = (char *)svptr + offset;
		1441	req->size = len;
		1442
		1443	REQ_SEND;
		1444	}
		1445	}
		1446
		1447	void
		1448	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_MLOCKALL;
		1454	req->int1 = flags;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
1572	aio_busy (delay,callback=&PL_sv_undef)	1460	aio_busy (double delay, SV *callback=&PL_sv_undef)
1573	double delay
1574	SV * callback
1575	PPCODE:	1461	PPCODE:
1576	{	1462	{
1577	dREQ;	1463	dREQ;
1578		1464
1579	req->type = REQ_BUSY;	1465	req->type = EIO_BUSY;
1580	req->int1 = delay < 0. ? 0 : delay;	1466	req->nv1 = delay < 0. ? 0. : delay;
1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1582		1467
1583	REQ_SEND;	1468	REQ_SEND;
1584	}	1469	}
1585		1470
1586	void	1471	void
1587	aio_group (callback=&PL_sv_undef)	1472	aio_group (SV *callback=&PL_sv_undef)
1588	SV * callback
1589	PROTOTYPE: ;$
1590	PPCODE:	1473	PPCODE:
1591	{	1474	{
1592	dREQ;	1475	dREQ;
1593		1476
1594	req->type = REQ_GROUP;	1477	req->type = EIO_GROUP;
1595		1478
1596	req_send (req);	1479	req_submit (req);
1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1480	XPUSHs (req_sv (req, aio_grp_stash));
1598	}	1481	}
1599		1482
1600	void	1483	void
1601	aio_nop (callback=&PL_sv_undef)	1484	aio_nop (SV *callback=&PL_sv_undef)
1602	SV * callback	1485	ALIAS:
		1486	aio_nop = EIO_NOP
		1487	aio_sync = EIO_SYNC
1603	PPCODE:	1488	PPCODE:
1604	{	1489	{
1605	dREQ;	1490	dREQ;
1606		1491
1607	req->type = REQ_NOP;	1492	req->type = ix;
1608		1493
1609	REQ_SEND;	1494	REQ_SEND;
1610	}	1495	}
1611		1496
1612	int	1497	int
1613	aioreq_pri (int pri = 0)	1498	aioreq_pri (int pri = 0)
1614	PROTOTYPE: ;$
1615	CODE:	1499	CODE:
1616	RETVAL = next_pri - PRI_BIAS;	1500	RETVAL = next_pri;
1617	if (items > 0)	1501	if (items > 0)
1618	{	1502	{
1619	if (pri < PRI_MIN) pri = PRI_MIN;	1503	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1620	if (pri > PRI_MAX) pri = PRI_MAX;	1504	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1621	next_pri = pri + PRI_BIAS;	1505	next_pri = pri;
1622	}	1506	}
1623	OUTPUT:	1507	OUTPUT:
1624	RETVAL	1508	RETVAL
1625		1509
1626	void	1510	void
1627	aioreq_nice (int nice = 0)	1511	aioreq_nice (int nice = 0)
1628	CODE:	1512	CODE:
1629	nice = next_pri - nice;	1513	nice = next_pri - nice;
1630	if (nice < PRI_MIN) nice = PRI_MIN;	1514	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1631	if (nice > PRI_MAX) nice = PRI_MAX;	1515	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1632	next_pri = nice + PRI_BIAS;	1516	next_pri = nice;
1633		1517
1634	void	1518	void
1635	flush ()	1519	flush ()
1636	PROTOTYPE:
1637	CODE:	1520	CODE:
1638	while (nreqs)	1521	while (eio_nreqs ())
1639	{	1522	{
1640	poll_wait ();	1523	poll_wait ();
1641	poll_cb (0);	1524	poll_cb ();
1642	}	1525	}
1643		1526
1644	void	1527	int
1645	poll()	1528	poll ()
1646	PROTOTYPE:
1647	CODE:	1529	CODE:
1648	if (nreqs)
1649	{
1650	poll_wait ();	1530	poll_wait ();
1651	poll_cb (0);	1531	RETVAL = poll_cb ();
1652	}
1653
1654	int
1655	poll_fileno()
1656	PROTOTYPE:
1657	CODE:
1658	RETVAL = respipe [0];
1659	OUTPUT:	1532	OUTPUT:
1660	RETVAL	1533	RETVAL
1661		1534
1662	int	1535	int
		1536	poll_fileno ()
		1537	CODE:
		1538	RETVAL = s_epipe_fd (&respipe);
		1539	OUTPUT:
		1540	RETVAL
		1541
		1542	int
1663	poll_cb(...)	1543	poll_cb (...)
1664	PROTOTYPE:	1544	PROTOTYPE:
1665	CODE:	1545	CODE:
1666	RETVAL = poll_cb ();	1546	RETVAL = poll_cb ();
1667	OUTPUT:	1547	OUTPUT:
1668	RETVAL	1548	RETVAL
1669		1549
1670	void	1550	void
1671	poll_wait()	1551	poll_wait ()
1672	PROTOTYPE:
1673	CODE:	1552	CODE:
1674	if (nreqs)
1675	poll_wait ();	1553	poll_wait ();
1676		1554
1677	int	1555	int
1678	nreqs()	1556	nreqs ()
1679	PROTOTYPE:
1680	CODE:	1557	CODE:
1681	RETVAL = nreqs;	1558	RETVAL = eio_nreqs ();
1682	OUTPUT:	1559	OUTPUT:
1683	RETVAL	1560	RETVAL
1684		1561
1685	int	1562	int
1686	nready()	1563	nready ()
1687	PROTOTYPE:
1688	CODE:	1564	CODE:
1689	RETVAL = get_nready ();	1565	RETVAL = eio_nready ();
1690	OUTPUT:	1566	OUTPUT:
1691	RETVAL	1567	RETVAL
1692		1568
1693	int	1569	int
1694	npending()	1570	npending ()
1695	PROTOTYPE:
1696	CODE:	1571	CODE:
1697	RETVAL = get_npending ();	1572	RETVAL = eio_npending ();
1698	OUTPUT:	1573	OUTPUT:
1699	RETVAL	1574	RETVAL
1700		1575
1701	int	1576	int
1702	nthreads()	1577	nthreads ()
1703	PROTOTYPE:
1704	CODE:	1578	CODE:
1705	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1579	RETVAL = eio_nthreads ();
1706	RETVAL = started;
1707	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1708	OUTPUT:	1580	OUTPUT:
1709	RETVAL	1581	RETVAL
1710		1582
		1583	int
		1584	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1585	CODE:
		1586	RETVAL = posix_fadvise (fh, offset, length, advice);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	ssize_t
		1591	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1592	CODE:
		1593	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1599	PPCODE:
		1600	sv_unmagic (scalar, MMAP_MAGIC);
		1601	{
		1602	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1603	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1604	if (addr == (void *)-1)
		1605	XSRETURN_NO;
		1606
		1607	sv_force_normal (scalar);
		1608
		1609	/* we store the length in mg_obj, as namlen is I32 :/ */
		1610	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1611	->mg_obj = (SV *)length;
		1612
		1613	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1614
		1615	if (!(prot & PROT_WRITE))
		1616	SvREADONLY_on (scalar);
		1617
		1618	if (SvLEN (scalar))
		1619	Safefree (SvPVX (scalar));
		1620
		1621	SvPVX (scalar) = (char *)addr;
		1622	SvCUR_set (scalar, length);
		1623	SvLEN_set (scalar, 0);
		1624	SvPOK_only (scalar);
		1625
		1626	XSRETURN_YES;
		1627	}
		1628
		1629	void
		1630	munmap (SV *scalar)
		1631	CODE:
		1632	sv_unmagic (scalar, MMAP_MAGIC);
		1633
		1634	int
		1635	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1636	ALIAS:
		1637	mprotect = 1
		1638	CODE:
		1639	{
		1640	STRLEN svlen;
		1641	void *addr = SvPVbyte (scalar, svlen);
		1642	size_t len = SvUV (length);
		1643
		1644	if (offset < 0)
		1645	offset += svlen;
		1646
		1647	if (offset < 0 || offset > svlen)
		1648	croak ("offset outside of scalar");
		1649
		1650	if (!SvOK (length) || len + offset > svlen)
		1651	len = svlen - offset;
		1652
		1653	addr = (void *)(((intptr_t)addr) + offset);
		1654	eio_page_align (&addr, &len);
		1655
		1656	switch (ix)
		1657	{
		1658	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1659	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1660	}
		1661	}
		1662	OUTPUT:
		1663	RETVAL
		1664
		1665	int
		1666	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1667	CODE:
		1668	{
		1669	STRLEN svlen;
		1670	void *addr = SvPVbyte (scalar, svlen);
		1671	size_t len = SvUV (length);
		1672
		1673	if (offset < 0)
		1674	offset += svlen;
		1675
		1676	if (offset < 0 || offset > svlen)
		1677	croak ("offset outside of scalar");
		1678
		1679	if (!SvOK (length) || len + offset > svlen)
		1680	len = svlen - offset;
		1681
		1682	addr = (void *)(((intptr_t)addr) + offset);
		1683	eio_page_align (&addr, &len);
		1684	#if _POSIX_MEMLOCK_RANGE
		1685	RETVAL = munlock (addr, len);
		1686	#else
		1687	RETVAL = ((errno = ENOSYS), -1);
		1688	#endif
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
		1694	munlockall ()
		1695	CODE:
		1696	#if _POSIX_MEMLOCK
		1697	munlockall ();
		1698	#else
		1699	RETVAL = -1;
		1700	errno = ENOSYS;
		1701	#endif
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	void _on_next_submit (SV *cb)
		1706	CODE:
		1707	SvREFCNT_dec (on_next_submit);
		1708	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1709
1711	PROTOTYPES: DISABLE	1710	PROTOTYPES: DISABLE
1712		1711
1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1712	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1714		1713
1715	void	1714	void
1716	cancel (aio_req_ornot req)	1715	cancel (aio_req_ornot req)
1717	CODE:	1716	CODE:
1718	req_cancel (req);	1717	eio_cancel (req);
1719		1718
1720	void	1719	void
1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1720	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1722	CODE:	1721	PPCODE:
		1722	{
		1723	if (GIMME_V != G_VOID)
		1724	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1725
		1726	if (items > 1)
		1727	{
		1728	SV *cb_cv =get_cb (callback);
		1729
1723	SvREFCNT_dec (req->callback);	1730	SvREFCNT_dec (req->callback);
1724	req->callback = newSVsv (callback);	1731	req->callback = SvREFCNT_inc (cb_cv);
		1732	}
		1733	}
1725		1734
1726	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1735	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1727		1736
1728	void	1737	void
1729	add (aio_req grp, ...)	1738	add (aio_req grp, ...)
1730	PPCODE:	1739	PPCODE:
1731	{	1740	{
1732	int i;	1741	int i;
1733	aio_req req;
1734		1742
1735	if (grp->int1 == 2)	1743	if (grp->int1 == 2)
1736	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1737		1745
1738	for (i = 1; i < items; ++i )	1746	for (i = 1; i < items; ++i )
1739	{	1747	{
		1748	aio_req req;
		1749
1740	if (GIMME_V != G_VOID)	1750	if (GIMME_V != G_VOID)
1741	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1751	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1742		1752
1743	req = SvAIO_REQ (ST (i));	1753	req = SvAIO_REQ (ST (i));
1744		1754
1745	if (req)	1755	if (req)
1746	{	1756	eio_grp_add (grp, req);
1747	++grp->size;
1748	req->grp = grp;
1749
1750	req->grp_prev = 0;
1751	req->grp_next = grp->grp_first;
1752
1753	if (grp->grp_first)
1754	grp->grp_first->grp_prev = req;
1755
1756	grp->grp_first = req;
1757	}
1758	}	1757	}
1759	}	1758	}
1760		1759
1761	void	1760	void
1762	cancel_subs (aio_req_ornot req)	1761	cancel_subs (aio_req_ornot req)
…		…
1771	AV *av;	1770	AV *av;
1772		1771
1773	grp->errorno = errno;	1772	grp->errorno = errno;
1774		1773
1775	av = newAV ();	1774	av = newAV ();
		1775	av_extend (av, items - 1);
1776		1776
1777	for (i = 1; i < items; ++i )	1777	for (i = 1; i < items; ++i )
1778	av_push (av, newSVsv (ST (i)));	1778	av_push (av, newSVsv (ST (i)));
1779		1779
1780	SvREFCNT_dec (grp->sv1);	1780	SvREFCNT_dec (grp->sv1);
…		…
1787	grp->errorno = errorno;	1787	grp->errorno = errorno;
1788		1788
1789	void	1789	void
1790	limit (aio_req grp, int limit)	1790	limit (aio_req grp, int limit)
1791	CODE:	1791	CODE:
1792	grp->int2 = limit;	1792	eio_grp_limit (grp, limit);
1793	aio_grp_feed (grp);
1794		1793
1795	void	1794	void
1796	feed (aio_req grp, SV *callback=&PL_sv_undef)	1795	feed (aio_req grp, SV *callback=&PL_sv_undef)
1797	CODE:	1796	CODE:
1798	{	1797	{
1799	SvREFCNT_dec (grp->sv2);	1798	SvREFCNT_dec (grp->sv2);
1800	grp->sv2 = newSVsv (callback);	1799	grp->sv2 = newSVsv (callback);
		1800	grp->feed = aio_grp_feed;
1801		1801
1802	if (grp->int2 <= 0)	1802	if (grp->int2 <= 0)
1803	grp->int2 = 2;	1803	grp->int2 = 2;
1804		1804
1805	aio_grp_feed (grp);	1805	eio_grp_limit (grp, grp->int2);
1806	}	1806	}
1807		1807

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