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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.104 by root, Sun Jul 8 11:05:36 2007 UTC vs.
Revision 1.271 by root, Fri Dec 28 12:43:00 2018 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
		8	#include "perliol.h"
		9
		10	#if !defined mg_findext
		11	# define mg_findext(sv,type,vtbl) mg_find (sv, type)
		12	#endif
8		13
9	#include <stddef.h>	14	#include <stddef.h>
10	#include <stdlib.h>	15	#include <stdlib.h>
11	#include <errno.h>	16	#include <errno.h>
12	#include <sys/types.h>	17	#include <sys/types.h>
		18	#include <sys/socket.h>
13	#include <sys/stat.h>	19	#include <sys/stat.h>
14	#include <limits.h>	20	#include <limits.h>
15	#include <fcntl.h>	21	#include <fcntl.h>
16	#include <sched.h>	22	#include <sched.h>
17		23
		24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
18	#ifdef _WIN32	47	#ifdef _WIN32
19		48
20	# define SIGIO 0	49	// perl overrides all those nice libc functions
21	typedef Direntry_t X_DIRENT;	50
22	#undef malloc	51	#undef malloc
23	#undef free	52	#undef free
24
25	// perl overrides all those nice win32 functions
26	# undef open	53	#undef open
27	# undef read	54	#undef read
28	# undef write	55	#undef write
29	# undef send	56	#undef send
30	# undef recv	57	#undef recv
31	# undef stat	58	#undef stat
		59	#undef lstat
32	# undef fstat	60	#undef fstat
33	# define lstat stat
34	# undef truncate	61	#undef truncate
35	# undef ftruncate	62	#undef ftruncate
36	# undef open	63	#undef open
		64	#undef link
37	# undef close	65	#undef close
38	# undef unlink	66	#undef unlink
		67	#undef mkdir
39	# undef rmdir	68	#undef rmdir
40	# undef rename	69	#undef rename
41	# undef lseek	70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80	#undef utime
42		81
43	# define chown(a,b,c) (errno = ENOSYS, -1)	82	#define EIO_STRUCT_STAT struct _stati64
44	# define fchown(a,b,c) (errno = ENOSYS, -1)	83	#define EIO_STRUCT_STATI64
45	# define fchmod(a,b) (errno = ENOSYS, -1)
46	# define symlink(a,b) (errno = ENOSYS, -1)
47	# define readlink(a,b,c) (errno = ENOSYS, -1)
48	# define mknod(a,b,c) (errno = ENOSYS, -1)
49	# define truncate(a,b) (errno = ENOSYS, -1)
50	# define ftruncate(fd,o) chsize ((fd), (o))
51	# define fsync(fd) _commit (fd)
52	# define opendir(fd) (errno = ENOSYS, 0)
53	# define readdir(fd) (errno = ENOSYS, -1)
54	# define closedir(fd) (errno = ENOSYS, -1)
55	# define mkdir(a,b) mkdir (a)
56		84
57	#else	85	#else
58		86
59	# include "autoconf/config.h"
60	# include <sys/time.h>	87	#include <sys/time.h>
61	# include <sys/select.h>	88	#include <sys/select.h>
62	# include <unistd.h>	89	#include <unistd.h>
63	# include <utime.h>	90	#include <utime.h>
64	# include <signal.h>	91	#include <signal.h>
65	typedef struct dirent X_DIRENT;
66		92
67	#endif	93	#define EIO_STRUCT_STAT Stat_t
68		94
69	#if HAVE_SENDFILE	95	#endif
70	# if __linux	96
71	# include <sys/sendfile.h>	97	/*****************************************************************************/
72	# elif __freebsd	98
		99	#if __GNUC__ >= 3
		100	# define expect(expr,value) __builtin_expect ((expr),(value))
		101	#else
		102	# define expect(expr,value) (expr)
		103	#endif
		104
		105	#define expect_false(expr) expect ((expr) != 0, 0)
		106	#define expect_true(expr) expect ((expr) != 0, 1)
		107
		108	/*****************************************************************************/
		109
		110	#include "config.h"
		111
		112	#if HAVE_SYS_MKDEV_H
73	# include <sys/socket.h>	113	# include <sys/mkdev.h>
		114	#elif HAVE_SYS_SYSMACROS_H
		115	# include <sys/sysmacros.h>
		116	#endif
		117
		118	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
74	# include <sys/uio.h>	119	# include <sys/mman.h>
75	# elif __hpux	120	#endif
76	# include <sys/socket.h>	121
77	# elif __solaris /* not yet */	122	#if HAVE_ST_XTIMENSEC
		123	# define ATIMENSEC PL_statcache.st_atimensec
		124	# define MTIMENSEC PL_statcache.st_mtimensec
		125	# define CTIMENSEC PL_statcache.st_ctimensec
		126	#elif HAVE_ST_XTIMESPEC
		127	# define ATIMENSEC PL_statcache.st_atim.tv_nsec
		128	# define MTIMENSEC PL_statcache.st_mtim.tv_nsec
		129	# define CTIMENSEC PL_statcache.st_ctim.tv_nsec
		130	#else
		131	# define ATIMENSEC 0
		132	# define MTIMENSEC 0
		133	# define CTIMENSEC 0
		134	#endif
		135
		136	#if HAVE_ST_BIRTHTIMENSEC
		137	# define BTIMESEC PL_statcache.st_birthtime
		138	# define BTIMENSEC PL_statcache.st_birthtimensec
		139	#elif HAVE_ST_BIRTHTIMESPEC
		140	# define BTIMESEC PL_statcache.st_birthtim.tv_sec
		141	# define BTIMENSEC PL_statcache.st_birthtim.tv_nsec
		142	#else
		143	# define BTIMESEC 0
		144	# define BTIMENSEC 0
		145	#endif
		146
		147	#if HAVE_ST_GEN
		148	# define ST_GEN PL_statcache.st_gen
		149	#else
		150	# define ST_GEN 0
		151	#endif
		152
		153	#include "schmorp.h"
		154
		155	#if HAVE_EVENTFD
78	# include <sys/sendfile.h>	156	# include <sys/eventfd.h>
		157	#endif
		158
		159	#if HAVE_TIMERFD
		160	# include <sys/timerfd.h>
		161	#endif
		162
		163	#if HAVE_RLIMITS
		164	#include <sys/time.h>
		165	#include <sys/resource.h>
		166	#endif
		167
		168	typedef SV SV8; /* byte-sv, used for argument-checking */
		169	typedef int aio_rfd; /* read file desriptor */
		170	typedef int aio_wfd; /* write file descriptor */
		171
		172	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		173
		174	#define EIO_REQ_MEMBERS \
		175	SV *callback; \
		176	SV *sv1, *sv2; \
		177	SV *sv3, *sv4; \
		178	STRLEN stroffset; \
		179	SV *self;
		180
		181	#define EIO_NO_WRAPPERS 1
		182
		183	#include "libeio/eio.h"
		184
		185	static int req_invoke (eio_req *req);
		186	#define EIO_FINISH(req) req_invoke (req)
		187	static void req_destroy (eio_req *grp);
		188	#define EIO_DESTROY(req) req_destroy (req)
		189
		190	#include "libeio/eio.c"
		191
		192	#if !HAVE_POSIX_FADVISE
		193	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		194	#endif
		195
		196	#if !HAVE_POSIX_MADVISE
		197	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef MAP_ANONYMOUS
		201	# ifdef MAP_ANON
		202	# define MAP_ANONYMOUS MAP_ANON
79	# else	203	# else
80	# error sendfile support requested but not available	204	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
81	# endif	205	# endif
82	#endif	206	#endif
83		207
84	/* number of seconds after which idle threads exit */	208	#ifndef makedev
85	#define IDLE_TIMEOUT 10	209	# define makedev(maj,min) (((maj) << 8) | (min))
86
87	/* used for struct dirent, AIX doesn't provide it */
88	#ifndef NAME_MAX
89	# define NAME_MAX 4096
90	#endif	210	#endif
91		211	#ifndef major
92	/* buffer size for various temporary buffers */	212	# define major(dev) ((dev) >> 8)
93	#define AIO_BUFSIZE 65536
94
95	/* use NV for 32 bit perls as it allows larger offsets */
96	#if IVSIZE >= 8
97	# define SvVAL64 SvIV
98	#else
99	# define SvVAL64 SvNV
100	#endif	213	#endif
		214	#ifndef minor
		215	# define minor(dev) ((dev) & 0xff)
		216	#endif
101		217
102	#define dBUF \	218	/* solaris has a non-posix/unix compliant PAGESIZE that breaks compilation */
103	char *aio_buf; \	219	#ifdef __sun
104	X_LOCK (wrklock); \	220	# undef PAGESIZE
105	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	221	#endif
106	X_UNLOCK (wrklock); \	222
107	if (!aio_buf) \	223	#if PAGESIZE <= 0
		224	# define PAGESIZE sysconf (_SC_PAGESIZE)
		225	#endif
		226
		227	/*****************************************************************************/
		228
		229	#if !_POSIX_MAPPED_FILES
		230	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, (void *)-1)
		231	# define munmap(addr,length) EIO_ENOSYS ()
		232	#endif
		233
		234	#if !_POSIX_MEMORY_PROTECTION
		235	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		236	#endif
		237
		238	#if !MREMAP_MAYMOVE
		239	# define mremap(old_address,old_size,new_size,flags,new_address) (errno = ENOSYS, (void *)-1)
		240	#endif
		241
		242	#define FOREIGN_MAGIC PERL_MAGIC_ext
		243
		244	static int ecb_cold
		245	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		246	{
		247	int old_errno = errno;
		248	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		249	errno = old_errno;
		250
		251	mg->mg_obj = 0; /* just in case */
		252
		253	SvREADONLY_off (sv);
		254
		255	if (SvPVX (sv) != mg->mg_ptr)
		256	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		257
		258	SvCUR_set (sv, 0);
		259	SvPVX (sv) = 0;
		260	SvOK_off (sv);
		261
108	return -1;	262	return 0;
		263	}
109		264
110	typedef SV SV8; /* byte-sv, used for argument-checking */	265	static MGVTBL mmap_vtbl = {
111		266	0, 0, 0, 0, mmap_free
112	enum {
113	REQ_QUIT,
114	REQ_OPEN, REQ_CLOSE,
115	REQ_READ, REQ_WRITE,
116	REQ_READAHEAD, REQ_SENDFILE,
117	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
118	REQ_TRUNCATE, REQ_FTRUNCATE,
119	REQ_UTIME, REQ_FUTIME,
120	REQ_CHMOD, REQ_FCHMOD,
121	REQ_CHOWN, REQ_FCHOWN,
122	REQ_FSYNC, REQ_FDATASYNC,
123	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
124	REQ_MKNOD, REQ_READDIR,
125	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
126	REQ_GROUP, REQ_NOP,
127	REQ_BUSY,
128	};	267	};
129		268
130	#define AIO_REQ_KLASS "IO::AIO::REQ"	269	static int ecb_cold
131	#define AIO_GRP_KLASS "IO::AIO::GRP"	270	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
132
133	typedef struct aio_cb
134	{	271	{
135	struct aio_cb *volatile next;	272	free (mg->mg_ptr);
		273	mg->mg_obj = 0; /* just in case */
136		274
137	SV *callback;	275	SvREADONLY_off (sv);
138	SV *sv1, *sv2;
139	void *ptr1, *ptr2;
140	off_t offs;
141	size_t size;
142	ssize_t result;
143	double nv1, nv2;
144		276
145	STRLEN stroffset;	277	if (SvPVX (sv) != mg->mg_ptr)
146	int type;	278	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
147	int int1, int2, int3;
148	int errorno;
149	mode_t mode; /* open */
150		279
151	unsigned char flags;	280	SvCUR_set (sv, 0);
152	unsigned char pri;	281	SvPVX (sv) = 0;
		282	SvOK_off (sv);
153		283
154	SV *self; /* the perl counterpart of this request, if any */	284	return 0;
155	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	285	}
156	} aio_cb;
157		286
158	enum {	287	static MGVTBL sysfree_vtbl = {
159	FLAG_CANCELLED = 0x01, /* request was cancelled */	288	0, 0, 0, 0, sysfree_free
160	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
161	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
162	};	289	};
163		290
164	typedef aio_cb *aio_req;	291	/*****************************************************************************/
165	typedef aio_cb *aio_req_ornot;
166		292
167	enum {	293	/* helper: set scalar to foreign ptr with custom free */
168	PRI_MIN = -4,	294	static void
169	PRI_MAX = 4,	295	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
170
171	DEFAULT_PRI = 0,
172	PRI_BIAS = -PRI_MIN,
173	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
174	};
175
176	#define AIO_TICKS ((1000000 + 1023) >> 10)
177
178	static unsigned int max_poll_time = 0;
179	static unsigned int max_poll_reqs = 0;
180
181	/* calculcate time difference in ~1/AIO_TICKS of a second */
182	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
183	{	296	{
184	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS	297	sv_force_normal (sv);
185	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
186	}
187		298
188	static thread_t main_tid;	299	/* we store the length in mg_obj, as namlen is I32 :/ */
189	static int main_sig;	300	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
190	static int block_sig_level;	301	->mg_obj = (SV *)length;
191		302
192	void block_sig ()	303	SvUPGRADE (sv, SVt_PV); /* nop... */
193	{
194	sigset_t ss;
195		304
196	if (block_sig_level++)	305	if (SvLEN (sv))
		306	Safefree (SvPVX (sv));
		307
		308	SvPVX (sv) = (char *)addr;
		309	SvCUR_set (sv, length);
		310	SvLEN_set (sv, 0);
		311	SvPOK_only (sv);
		312	}
		313
		314	static void
		315	sv_clear_foreign (SV *sv)
		316	{
		317	/* todo: iterate over magic and only free ours, but of course */
		318	/* the perl5porters will call that (correct) behaviour buggy */
		319	sv_unmagic (sv, FOREIGN_MAGIC);
		320	}
		321
		322	/*****************************************************************************/
		323
		324	/* defines all sorts of constants to 0 unless they are already defined */
		325	/* also provides const_iv_ and const_niv_ macros for them */
		326	#include "def0.h"
		327
		328	/*****************************************************************************/
		329
		330	static void
		331	fiemap (eio_req *req)
		332	{
		333	req->result = -1;
		334
		335	#if HAVE_FIEMAP
		336	/* assume some c99 */
		337	struct fiemap *fiemap = 0;
		338	size_t end_offset;
		339	int count = req->int3;
		340
		341	req->flags |= EIO_FLAG_PTR1_FREE;
		342
		343	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		344	/* increase in 3.5kb steps */
		345	if (count < 0)
		346	count = 8;
		347
		348	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		349	errno = ENOMEM;
		350	if (!fiemap)
197	return;	351	return;
198		352
199	if (!main_sig)	353	req->ptr1 = fiemap;
		354
		355	fiemap->fm_start = req->offs;
		356	fiemap->fm_length = req->size;
		357	fiemap->fm_flags = req->int2;
		358	fiemap->fm_extent_count = count;
		359
		360	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
200	return;	361	return;
201		362
202	sigemptyset (&ss);	363	if (req->int3 >= 0 /* not autosizing */
203	sigaddset (&ss, main_sig);	364	|| !fiemap->fm_mapped_extents /* no more extents */
204	pthread_sigmask (SIG_BLOCK, &ss, 0);	365	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
205	}	366	goto done;
206		367
207	void unblock_sig ()	368	/* else we have to loop -
208	{	369	* it would be tempting (actually I tried that first) to just query the
209	sigset_t ss;	370	* number of extents needed, but linux often feels like not returning all
		371	* extents, without telling us it left any out. this complicates
		372	* this quite a bit.
		373	*/
210		374
211	if (--block_sig_level)	375	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
212	return;
213		376
214	if (!main_sig)	377	for (;;)
215	return;
216
217	sigemptyset (&ss);
218	sigaddset (&ss, main_sig);
219	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
220	}
221
222	static int next_pri = DEFAULT_PRI + PRI_BIAS;
223
224	static unsigned int started, idle, wanted;
225
226	/* worker threads management */
227	static mutex_t wrklock = X_MUTEX_INIT;
228
229	typedef struct worker {
230	/* locked by wrklock */
231	struct worker *prev, *next;
232
233	thread_t tid;
234
235	/* locked by reslock, reqlock or wrklock */
236	aio_req req; /* currently processed request */
237	void *dbuf;
238	DIR *dirp;
239	} worker;
240
241	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
242
243	static void worker_clear (worker *wrk)
244	{
245	if (wrk->dirp)
246	{	378	{
247	closedir (wrk->dirp);	379	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
248	wrk->dirp = 0;	380	char scratch[3072];
249	}	381	struct fiemap *incmap = (struct fiemap *)scratch;
250		382
251	if (wrk->dbuf)	383	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
252	{	384	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
253	free (wrk->dbuf);	385	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
254	wrk->dbuf = 0;	386	incmap->fm_flags = fiemap->fm_flags;
255	}	387	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
256	}
257		388
258	static void worker_free (worker *wrk)	389	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
259	{
260	wrk->next->prev = wrk->prev;
261	wrk->prev->next = wrk->next;
262
263	free (wrk);
264	}
265
266	static volatile unsigned int nreqs, nready, npending;
267	static volatile unsigned int max_idle = 4;
268	static volatile unsigned int max_outstanding = 0xffffffff;
269	static int respipe [2], respipe_osf [2];
270
271	static mutex_t reslock = X_MUTEX_INIT;
272	static mutex_t reqlock = X_MUTEX_INIT;
273	static cond_t reqwait = X_COND_INIT;
274
275	#if WORDACCESS_UNSAFE
276
277	static unsigned int get_nready ()
278	{
279	unsigned int retval;
280
281	X_LOCK (reqlock);
282	retval = nready;
283	X_UNLOCK (reqlock);
284
285	return retval;
286	}
287
288	static unsigned int get_npending ()
289	{
290	unsigned int retval;
291
292	X_LOCK (reslock);
293	retval = npending;
294	X_UNLOCK (reslock);
295
296	return retval;
297	}
298
299	static unsigned int get_nthreads ()
300	{
301	unsigned int retval;
302
303	X_LOCK (wrklock);
304	retval = started;
305	X_UNLOCK (wrklock);
306
307	return retval;
308	}
309
310	#else
311
312	# define get_nready() nready
313	# define get_npending() npending
314	# define get_nthreads() started
315
316	#endif
317
318	/*
319	* a somewhat faster data structure might be nice, but
320	* with 8 priorities this actually needs <20 insns
321	* per shift, the most expensive operation.
322	*/
323	typedef struct {
324	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
325	int size;
326	} reqq;
327
328	static reqq req_queue;
329	static reqq res_queue;
330
331	int reqq_push (reqq *q, aio_req req)
332	{
333	int pri = req->pri;
334	req->next = 0;
335
336	if (q->qe[pri])
337	{
338	q->qe[pri]->next = req;
339	q->qe[pri] = req;
340	}
341	else
342	q->qe[pri] = q->qs[pri] = req;
343
344	return q->size++;
345	}
346
347	aio_req reqq_shift (reqq *q)
348	{
349	int pri;
350
351	if (!q->size)
352	return 0;	390	return;
353		391
354	--q->size;	392	if (!incmap->fm_mapped_extents)
		393	goto done;
355		394
356	for (pri = NUM_PRI; pri--; )	395	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
357	{	396	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
358	aio_req req = q->qs[pri];	397	errno = ENOMEM;
359
360	if (req)	398	if (!fiemap)
		399	return;
		400
		401	req->ptr1 = fiemap;
		402
		403	for (count = 0; count < incmap->fm_mapped_extents; ++count)
361	{	404	{
362	if (!(q->qs[pri] = req->next))	405	struct fiemap_extent *e = incmap->fm_extents + count;
363	q->qe[pri] = 0;
364		406
365	return req;	407	if (e->fe_logical + e->fe_length >= end_offset)
		408	goto done;
		409
		410	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		411
		412	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		413	goto done;
		414
366	}	415	}
367	}	416	}
368		417
369	abort ();	418	done:
370	}	419	req->result = 0;
371		420
372	static int poll_cb ();	421	#else
373	static int req_invoke (aio_req req);	422	errno = ENOSYS;
		423	#endif
		424	}
		425
		426	/*****************************************************************************/
		427
		428	static int close_fd; /* dummy fd to close fds via dup2 */
		429
		430	enum {
		431	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		432	};
		433
		434	typedef eio_req *aio_req;
		435	typedef eio_req *aio_req_ornot;
		436	typedef eio_wd aio_wd;
		437
		438	static SV *on_next_submit;
		439	static int next_pri = EIO_PRI_DEFAULT;
		440	static int max_outstanding;
		441
		442	static s_epipe respipe;
		443
374	static void req_destroy (aio_req req);	444	static void req_destroy (aio_req req);
375	static void req_cancel (aio_req req);	445	static void req_cancel (aio_req req);
376		446
		447	static void
		448	want_poll (void)
		449	{
		450	/* write a dummy byte to the pipe so fh becomes ready */
		451	s_epipe_signal (&respipe);
		452	}
		453
		454	static void
		455	done_poll (void)
		456	{
		457	/* read any signals sent by the worker threads */
		458	s_epipe_drain (&respipe);
		459	}
		460
377	/* must be called at most once */	461	/* must be called at most once */
378	static SV *req_sv (aio_req req, const char *klass)	462	static SV *
		463	req_sv (aio_req req, HV *stash)
379	{	464	{
380	if (!req->self)	465	if (!req->self)
381	{	466	{
382	req->self = (SV *)newHV ();	467	req->self = (SV *)newHV ();
383	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	468	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
384	}	469	}
385		470
386	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	471	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
387	}	472	}
388		473
389	static aio_req SvAIO_REQ (SV *sv)	474	static SV *
		475	newSVaio_wd (aio_wd wd)
		476	{
		477	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		478	}
		479
		480	static aio_req
		481	SvAIO_REQ (SV *sv)
390	{	482	{
391	MAGIC *mg;	483	MAGIC *mg;
392		484
393	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	485	if (!SvROK (sv)
		486	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		487	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		488	&& SvSTASH (SvRV (sv)) != aio_req_stash
		489	&& !sv_derived_from (sv, "IO::AIO::REQ")))
394	croak ("object of class " AIO_REQ_KLASS " expected");	490	croak ("object of class IO::AIO::REQ expected");
395		491
396	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	492	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
397		493
398	return mg ? (aio_req)mg->mg_ptr : 0;	494	return mg ? (aio_req)mg->mg_ptr : 0;
399	}	495	}
400		496
		497	static aio_wd
		498	SvAIO_WD (SV *sv)
		499	{
		500	if (!SvROK (sv)
		501	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		502	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		503	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		504
		505	return (aio_wd)(long)SvIVX (SvRV (sv));
		506	}
		507
		508	static SV *
		509	newmortalFH (int fd, int flags)
		510	{
		511	if (fd < 0)
		512	return &PL_sv_undef;
		513
		514	GV *gv = (GV *)sv_newmortal ();
		515	char sym[64];
		516	int symlen;
		517
		518	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		519	gv_init (gv, aio_stash, sym, symlen, 0);
		520
		521	symlen = snprintf (
		522	sym,
		523	sizeof (sym),
		524	"%s&=%d",
		525	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		526	fd
		527	);
		528
		529	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		530	? (SV *)gv : &PL_sv_undef;
		531	}
		532
		533	static void
401	static void aio_grp_feed (aio_req grp)	534	aio_grp_feed (aio_req grp)
402	{	535	{
403	block_sig ();	536	if (grp->sv2 && SvOK (grp->sv2))
404
405	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
406	{	537	{
407	int old_len = grp->size;
408
409	if (grp->sv2 && SvOK (grp->sv2))
410	{
411	dSP;	538	dSP;
412		539
413	ENTER;	540	ENTER;
414	SAVETMPS;	541	SAVETMPS;
415	PUSHMARK (SP);	542	PUSHMARK (SP);
416	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	543	XPUSHs (req_sv (grp, aio_grp_stash));
417	PUTBACK;	544	PUTBACK;
418	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	545	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
419	SPAGAIN;	546	SPAGAIN;
420	FREETMPS;	547	FREETMPS;
421	LEAVE;	548	LEAVE;
422	}
423
424	/* stop if no progress has been made */
425	if (old_len == grp->size)
426	{
427	SvREFCNT_dec (grp->sv2);
428	grp->sv2 = 0;
429	break;
430	}
431	}	549	}
432
433	unblock_sig ();
434	}	550	}
435		551
436	static void aio_grp_dec (aio_req grp)	552	static void
		553	req_submit (eio_req *req)
437	{	554	{
438	--grp->size;	555	eio_submit (req);
439		556
440	/* call feeder, if applicable */	557	if (expect_false (on_next_submit))
441	aio_grp_feed (grp);
442
443	/* finish, if done */
444	if (!grp->size && grp->int1)
445	{	558	{
446	block_sig ();	559	dSP;
		560	SV *cb = sv_2mortal (on_next_submit);
447		561
448	if (!req_invoke (grp))	562	on_next_submit = 0;
449	{
450	req_destroy (grp);
451	unblock_sig ();
452	croak (0);
453	}
454		563
455	req_destroy (grp);	564	PUSHMARK (SP);
456	unblock_sig ();	565	PUTBACK;
		566	call_sv (cb, G_DISCARD | G_EVAL);
457	}	567	}
458	}	568	}
459		569
		570	static int
460	static int req_invoke (aio_req req)	571	req_invoke (eio_req *req)
461	{	572	{
462	dSP;
463
464	if (req->flags & FLAG_SV2_RO_OFF)	573	if (req->flags & FLAG_SV2_RO_OFF)
465	SvREADONLY_off (req->sv2);	574	SvREADONLY_off (req->sv2);
466		575
467	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	576	if (!EIO_CANCELLED (req) && req->callback)
468	{	577	{
		578	dSP;
		579	static SV *sv_result_cache; /* caches the result integer SV */
		580	SV *sv_result;
		581
469	ENTER;	582	ENTER;
470	SAVETMPS;	583	SAVETMPS;
471	PUSHMARK (SP);	584	PUSHMARK (SP);
472	EXTEND (SP, 1);	585	EXTEND (SP, 1);
473		586
		587	/* do not recreate the result IV from scratch each time */
		588	if (expect_true (sv_result_cache))
		589	{
		590	sv_result = sv_result_cache; sv_result_cache = 0;
		591	SvIV_set (sv_result, req->result);
		592	SvIOK_only (sv_result);
		593	}
		594	else
		595	{
		596	sv_result = newSViv (req->result);
		597	SvREADONLY_on (sv_result);
		598	}
		599
474	switch (req->type)	600	switch (req->type)
475	{	601	{
		602	case EIO_WD_OPEN:
		603	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		604	break;
		605
476	case REQ_READDIR:	606	case EIO_READDIR:
477	{	607	{
478	SV *rv = &PL_sv_undef;	608	SV *rv = &PL_sv_undef;
479		609
480	if (req->result >= 0)	610	if (req->result >= 0)
481	{	611	{
482	int i;	612	int i;
483	char *buf = req->ptr2;	613	char *names = (char *)req->ptr2;
		614	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
484	AV *av = newAV ();	615	AV *av = newAV ();
485		616
486	av_extend (av, req->result - 1);	617	av_extend (av, req->result - 1);
487		618
488	for (i = 0; i < req->result; ++i)	619	for (i = 0; i < req->result; ++i)
489	{	620	{
490	SV *sv = newSVpv (buf, 0);	621	if (req->int1 & EIO_READDIR_DENTS)
		622	{
		623	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
491		624
		625	if (req->int1 & EIO_READDIR_CUSTOM2)
		626	{
		627	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		628	AV *avent = newAV ();
		629
		630	av_extend (avent, 2);
		631
		632	if (!sv_type [ent->type])
		633	{
		634	sv_type [ent->type] = newSViv (ent->type);
		635	SvREADONLY_on (sv_type [ent->type]);
		636	}
		637
		638	av_store (avent, 0, namesv);
		639	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		640	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		641
		642	av_store (av, i, newRV_noinc ((SV *)avent));
		643	}
		644	else
492	av_store (av, i, sv);	645	av_store (av, i, namesv);
		646
		647	++ent;
		648	}
		649	else
		650	{
		651	SV *name = newSVpv (names, 0);
		652	av_store (av, i, name);
493	buf += SvCUR (sv) + 1;	653	names += SvCUR (name) + 1;
		654	}
494	}	655	}
495		656
496	rv = sv_2mortal (newRV_noinc ((SV *)av));	657	rv = sv_2mortal (newRV_noinc ((SV *)av));
497	}	658	}
498		659
499	PUSHs (rv);	660	PUSHs (rv);
		661
		662	if (req->int1 & EIO_READDIR_CUSTOM1)
		663	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
500	}	664	}
501	break;	665	break;
502		666
503	case REQ_OPEN:	667	case EIO_OPEN:
		668	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		669	break;
		670
		671	case EIO_STATVFS:
		672	case EIO_FSTATVFS:
504	{	673	{
505	/* convert fd to fh */	674	SV *rv = &PL_sv_undef;
506	SV *fh;	675
		676	#ifndef _WIN32
		677	if (req->result >= 0)
		678	{
		679	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		680	HV *hv = newHV ();
		681	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		682	* chooses to make it a struct.
		683	*/
		684	unsigned long fsid = 0;
		685	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
507		686
508	PUSHs (sv_2mortal (newSViv (req->result)));	687	rv = sv_2mortal (newRV_noinc ((SV *)hv));
509	PUTBACK;
510	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
511	SPAGAIN;
512		688
513	fh = POPs;	689	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
514	PUSHMARK (SP);	690	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		691	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		692	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		693	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		694	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		695	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		696	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		697	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		698	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		699	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		700	}
		701	#endif
		702
515	XPUSHs (fh);	703	PUSHs (rv);
516	}	704	}
		705
517	break;	706	break;
518		707
519	case REQ_GROUP:	708	case EIO_GROUP:
520	req->int1 = 2; /* mark group as finished */	709	req->int1 = 2; /* mark group as finished */
521		710
522	if (req->sv1)	711	if (req->sv1)
523	{	712	{
524	int i;	713	int i;
…		…
528	for (i = 0; i <= AvFILL (av); ++i)	717	for (i = 0; i <= AvFILL (av); ++i)
529	PUSHs (*av_fetch (av, i, 0));	718	PUSHs (*av_fetch (av, i, 0));
530	}	719	}
531	break;	720	break;
532		721
533	case REQ_NOP:	722	case EIO_NOP:
534	case REQ_BUSY:	723	case EIO_BUSY:
535	break;	724	break;
536		725
537	case REQ_READLINK:	726	case EIO_READLINK:
		727	case EIO_REALPATH:
538	if (req->result > 0)	728	if (req->result > 0)
		729	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		730	break;
		731
		732	case EIO_STAT:
		733	case EIO_LSTAT:
		734	case EIO_FSTAT:
		735	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		736
		737	if (!(PL_laststatval = req->result))
		738	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		739	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		740
		741	PUSHs (sv_result);
		742	break;
		743
		744	case EIO_SEEK:
		745	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		746	break;
		747
		748	case EIO_READ:
		749	{
		750	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		751	*SvEND (req->sv2) = 0;
		752	SvPOK_only (req->sv2);
		753	SvSETMAGIC (req->sv2);
		754	PUSHs (sv_result);
		755	}
		756	break;
		757
		758	case EIO_SLURP:
		759	{
		760	if (req->result >= 0)
		761	{
		762	/* if length was originally not known, we steal the malloc'ed memory */
		763	if (req->flags & EIO_FLAG_PTR2_FREE)
		764	{
		765	req->flags &= ~EIO_FLAG_PTR2_FREE;
		766	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		767	}
		768	else
		769	{
		770	SvCUR_set (req->sv2, req->result);
		771	*SvEND (req->sv2) = 0;
		772	SvPOK_only (req->sv2);
		773	}
		774
		775	SvSETMAGIC (req->sv2);
		776	}
		777
		778	PUSHs (sv_result);
		779	}
		780	break;
		781
		782	case EIO_CUSTOM:
		783	if (req->feed == fiemap)
539	{	784	{
540	SvCUR_set (req->sv2, req->result);	785	#if HAVE_FIEMAP
541	*SvEND (req->sv2) = 0;
542	PUSHs (req->sv2);	786	if (!req->result)
		787	{
		788	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		789
		790	if (fiemap->fm_extent_count)
		791	{
		792	AV *av = newAV ();
		793	int i;
		794
		795	while (fiemap->fm_mapped_extents)
		796	{
		797	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		798	AV *ext_av = newAV ();
		799
		800	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		801	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		802	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		803	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		804
		805	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		806	}
		807
		808	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		809	}
		810	else
		811	{
		812	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		813	PUSHs (sv_result);
		814	}
		815	}
		816	#endif
543	}	817	}
		818	else
		819	PUSHs (sv_result);
544	break;	820	break;
545		821
546	case REQ_STAT:	822	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
547	case REQ_LSTAT:	823	if (req->result > 0)
548	case REQ_FSTAT:	824	SvIV_set (sv_result, 0);
549	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	825	/* FALLTHROUGH */
550	PL_laststatval = req->result;
551	PL_statcache = *(Stat_t *)(req->ptr2);
552	PUSHs (sv_2mortal (newSViv (req->result)));
553	break;
554
555	case REQ_READ:
556	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
557	*SvEND (req->sv2) = 0;
558	PUSHs (sv_2mortal (newSViv (req->result)));
559	break;
560		826
561	default:	827	default:
562	PUSHs (sv_2mortal (newSViv (req->result)));	828	PUSHs (sv_result);
563	break;	829	break;
564	}	830	}
565		831
566	errno = req->errorno;	832	errno = req->errorno;
567		833
568	PUTBACK;	834	PUTBACK;
569	call_sv (req->callback, G_VOID | G_EVAL);	835	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
570	SPAGAIN;	836	SPAGAIN;
		837
		838	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		839	SvREFCNT_dec (sv_result);
		840	else
		841	sv_result_cache = sv_result;
571		842
572	FREETMPS;	843	FREETMPS;
573	LEAVE;	844	LEAVE;
		845
		846	PUTBACK;
574	}	847	}
575		848
576	if (req->grp)
577	{
578	aio_req grp = req->grp;
579
580	/* unlink request */
581	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
582	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
583
584	if (grp->grp_first == req)
585	grp->grp_first = req->grp_next;
586
587	aio_grp_dec (grp);
588	}
589
590	return !SvTRUE (ERRSV);	849	return !!SvTRUE (ERRSV);
591	}	850	}
592		851
		852	static void
593	static void req_destroy (aio_req req)	853	req_destroy (aio_req req)
594	{	854	{
595	if (req->self)	855	if (req->self)
596	{	856	{
597	sv_unmagic (req->self, PERL_MAGIC_ext);	857	sv_unmagic (req->self, PERL_MAGIC_ext);
598	SvREFCNT_dec (req->self);	858	SvREFCNT_dec (req->self);
599	}	859	}
600		860
601	SvREFCNT_dec (req->sv1);	861	SvREFCNT_dec (req->sv1);
602	SvREFCNT_dec (req->sv2);	862	SvREFCNT_dec (req->sv2);
		863	SvREFCNT_dec (req->sv3);
		864	SvREFCNT_dec (req->sv4);
603	SvREFCNT_dec (req->callback);	865	SvREFCNT_dec (req->callback);
604		866
605	if (req->flags & FLAG_PTR2_FREE)
606	free (req->ptr2);
607
608	Safefree (req);	867	free (req);
609	}	868	}
610		869
		870	static void
611	static void req_cancel_subs (aio_req grp)	871	req_cancel_subs (aio_req grp)
612	{	872	{
613	aio_req sub;
614
615	if (grp->type != REQ_GROUP)	873	if (grp->type != EIO_GROUP)
616	return;	874	return;
617		875
618	SvREFCNT_dec (grp->sv2);	876	SvREFCNT_dec (grp->sv2);
619	grp->sv2 = 0;	877	grp->sv2 = 0;
620		878
621	for (sub = grp->grp_first; sub; sub = sub->grp_next)	879	eio_grp_cancel (grp);
622	req_cancel (sub);
623	}	880	}
624		881
625	static void req_cancel (aio_req req)	882	static void ecb_cold
		883	create_respipe (void)
626	{	884	{
627	req->flags |= FLAG_CANCELLED;	885	if (s_epipe_renew (&respipe))
628		886	croak ("IO::AIO: unable to initialize result pipe");
629	req_cancel_subs (req);
630	}	887	}
631
632	#ifdef USE_SOCKETS_AS_HANDLES
633	# define TO_SOCKET(x) (win32_get_osfhandle (x))
634	#else
635	# define TO_SOCKET(x) (x)
636	#endif
637		888
638	static void	889	static void
639	create_pipe (int fd[2])	890	poll_wait (void)
640	{	891	{
641	#ifdef _WIN32
642	int arg = 1;
643	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, fd)
644	|| ioctlsocket (TO_SOCKET (fd [0]), FIONBIO, &arg)
645	|| ioctlsocket (TO_SOCKET (fd [1]), FIONBIO, &arg))
646	#else
647	if (pipe (fd)
648	|| fcntl (fd [0], F_SETFL, O_NONBLOCK)
649	|| fcntl (fd [1], F_SETFL, O_NONBLOCK))
650	#endif
651	croak ("unable to initialize result pipe");
652
653	respipe_osf [0] = TO_SOCKET (respipe [0]);
654	respipe_osf [1] = TO_SOCKET (respipe [1]);
655	}
656
657	X_THREAD_PROC (aio_proc);
658
659	static void start_thread (void)
660	{
661	worker *wrk = calloc (1, sizeof (worker));
662
663	if (!wrk)
664	croak ("unable to allocate worker thread data");
665
666	X_LOCK (wrklock);
667
668	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
669	{
670	wrk->prev = &wrk_first;
671	wrk->next = wrk_first.next;
672	wrk_first.next->prev = wrk;
673	wrk_first.next = wrk;
674	++started;
675	}
676	else
677	free (wrk);
678
679	X_UNLOCK (wrklock);
680	}
681
682	static void maybe_start_thread ()
683	{
684	if (get_nthreads () >= wanted)
685	return;
686
687	/* todo: maybe use idle here, but might be less exact */
688	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
689	return;
690
691	start_thread ();
692	}
693
694	static void req_send (aio_req req)
695	{
696	block_sig ();
697
698	++nreqs;
699
700	X_LOCK (reqlock);
701	++nready;
702	reqq_push (&req_queue, req);
703	X_COND_SIGNAL (reqwait);
704	X_UNLOCK (reqlock);
705
706	unblock_sig ();
707
708	maybe_start_thread ();
709	}
710
711	static void end_thread (void)
712	{
713	aio_req req;
714
715	Newz (0, req, 1, aio_cb);
716
717	req->type = REQ_QUIT;
718	req->pri = PRI_MAX + PRI_BIAS;
719
720	X_LOCK (reqlock);
721	reqq_push (&req_queue, req);
722	X_COND_SIGNAL (reqwait);
723	X_UNLOCK (reqlock);
724
725	X_LOCK (wrklock);
726	--started;
727	X_UNLOCK (wrklock);
728	}
729
730	static void set_max_idle (int nthreads)
731	{
732	if (WORDACCESS_UNSAFE) X_LOCK (reqlock);
733	max_idle = nthreads <= 0 ? 1 : nthreads;
734	if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock);
735	}
736
737	static void min_parallel (int nthreads)
738	{
739	if (wanted < nthreads)
740	wanted = nthreads;
741	}
742
743	static void max_parallel (int nthreads)
744	{
745	if (wanted > nthreads)
746	wanted = nthreads;
747
748	while (started > wanted)
749	end_thread ();
750	}
751
752	static void poll_wait ()
753	{
754	fd_set rfd;
755
756	while (nreqs)	892	while (eio_nreqs ())
757	{	893	{
758	int size;	894	int size;
759	if (WORDACCESS_UNSAFE) X_LOCK (reslock);	895
		896	X_LOCK (EIO_POOL->reslock);
760	size = res_queue.size;	897	size = EIO_POOL->res_queue.size;
761	if (WORDACCESS_UNSAFE) X_UNLOCK (reslock);	898	X_UNLOCK (EIO_POOL->reslock);
762		899
763	if (size)	900	if (size)
764	return;	901	return;
765		902
766	maybe_start_thread ();	903	etp_maybe_start_thread (EIO_POOL);
767		904
768	FD_ZERO (&rfd);	905	s_epipe_wait (&respipe);
769	FD_SET (respipe [0], &rfd);
770
771	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
772	}	906	}
773	}	907	}
774		908
775	static int poll_cb ()	909	static int
		910	poll_cb (void)
776	{	911	{
777	dSP;
778	int count = 0;
779	int maxreqs = max_poll_reqs;
780	int do_croak = 0;
781	struct timeval tv_start, tv_now;
782	aio_req req;
783
784	if (max_poll_time)
785	gettimeofday (&tv_start, 0);
786
787	block_sig ();
788
789	for (;;)	912	for (;;)
790	{	913	{
791	for (;;)	914	int res = eio_poll ();
		915
		916	if (res > 0)
		917	croak (0);
		918
		919	if (!max_outstanding || max_outstanding > eio_nreqs ())
		920	return res;
		921
		922	poll_wait ();
		923	}
		924	}
		925
		926	static void ecb_cold
		927	reinit (void)
		928	{
		929	create_respipe ();
		930
		931	if (eio_init (want_poll, done_poll) < 0)
		932	croak ("IO::AIO: unable to initialise eio library");
		933	}
		934
		935	/*****************************************************************************/
		936
		937	static SV *
		938	get_cb (SV *cb_sv)
		939	{
		940	SvGETMAGIC (cb_sv);
		941	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		942	}
		943
		944	static aio_req ecb_noinline
		945	dreq (SV *callback)
		946	{
		947	SV *cb_cv;
		948	aio_req req;
		949	int req_pri = next_pri;
		950	next_pri = EIO_PRI_DEFAULT;
		951
		952	cb_cv = get_cb (callback);
		953
		954	req = calloc (sizeof (*req), 1);
		955	if (!req)
		956	croak ("out of memory during eio_req allocation");
		957
		958	req->callback = SvREFCNT_inc (cb_cv);
		959	req->pri = req_pri;
		960
		961	return req;
		962	}
		963
		964	#define dREQ \
		965	aio_req req = dreq (callback); \
		966
		967	#define REQ_SEND \
		968	PUTBACK; \
		969	req_submit (req); \
		970	SPAGAIN; \
		971	\
		972	if (GIMME_V != G_VOID) \
		973	XPUSHs (req_sv (req, aio_req_stash));
		974
		975	ecb_inline void
		976	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		977	{
		978	if (expect_false (SvROK (path)))
		979	{
		980	SV *rv = SvRV (path);
		981	SV *wdob;
		982
		983	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
792	{	984	{
793	maybe_start_thread ();	985	path = AvARRAY (rv)[1];
		986	wdob = AvARRAY (rv)[0];
794		987
795	X_LOCK (reslock);	988	if (SvOK (wdob))
796	req = reqq_shift (&res_queue);
797
798	if (req)
799	{	989	{
800	--npending;	990	*wd = SvAIO_WD (wdob);
801		991	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
802	if (!res_queue.size)
803	{
804	/* read any signals sent by the worker threads */
805	char buf [4];
806	while (PerlSock_recv (respipe [0], buf, 4, 0) == 4)
807	;
808	}
809	}
810
811	X_UNLOCK (reslock);
812
813	if (!req)
814	break;
815
816	--nreqs;
817
818	if (req->type == REQ_GROUP && req->size)
819	{
820	req->int1 = 1; /* mark request as delayed */
821	continue;
822	}	992	}
823	else	993	else
824	{	994	*wd = EIO_INVALID_WD;
825	if (!req_invoke (req))
826	{
827	req_destroy (req);
828	unblock_sig ();
829	croak (0);
830	}
831
832	count++;
833	}
834
835	req_destroy (req);
836
837	if (maxreqs && !--maxreqs)
838	break;
839
840	if (max_poll_time)
841	{
842	gettimeofday (&tv_now, 0);
843
844	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
845	break;
846	}
847	}	995	}
		996	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		997	{
		998	*wd = (aio_wd)(long)SvIVX (rv);
		999	*wdsv = SvREFCNT_inc_NN (rv);
		1000	*ptr = ".";
		1001	return; /* path set to "." */
		1002	}
		1003	else
		1004	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		1005	}
848		1006
849	if (nreqs <= max_outstanding)	1007	*pathsv = newSVsv (path);
		1008	*ptr = SvPVbyte_nolen (*pathsv);
		1009	}
		1010
		1011	static void ecb_noinline
		1012	req_set_path1 (aio_req req, SV *path)
		1013	{
		1014	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		1015	}
		1016
		1017	static void ecb_noinline
		1018	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		1019	{
		1020	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		1021
		1022	switch (SvTYPE (rv))
		1023	{
		1024	case SVt_PVIO:
		1025	case SVt_PVLV:
		1026	case SVt_PVGV:
		1027	req->type = type_fh;
		1028	req->sv1 = newSVsv (fh_or_path);
		1029	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
850	break;	1030	break;
851		1031
852	poll_wait ();	1032	default:
853		1033	req->type = type_path;
854	++maxreqs;	1034	req_set_path1 (req, fh_or_path);
		1035	break;
855	}	1036	}
856
857	unblock_sig ();
858	return count;
859	}	1037	}
860		1038
861	/*****************************************************************************/	1039	/*****************************************************************************/
862	/* work around various missing functions */
863		1040
864	#if !HAVE_PREADWRITE	1041	static void
865	# define pread aio_pread	1042	ts_set (struct timespec *ts, NV value)
866	# define pwrite aio_pwrite
867
868	/*
869	* make our pread/pwrite safe against themselves, but not against
870	* normal read/write by using a mutex. slows down execution a lot,
871	* but that's your problem, not mine.
872	*/
873	static mutex_t preadwritelock = X_MUTEX_INIT;
874
875	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
876	{	1043	{
877	ssize_t res;	1044	ts->tv_sec = value;
878	off_t ooffset;	1045	ts->tv_nsec = (value - ts->tv_sec) * 1e9;
879
880	X_LOCK (preadwritelock);
881	ooffset = lseek (fd, 0, SEEK_CUR);
882	lseek (fd, offset, SEEK_SET);
883	res = read (fd, buf, count);
884	lseek (fd, ooffset, SEEK_SET);
885	X_UNLOCK (preadwritelock);
886
887	return res;
888	}	1046	}
889		1047
890	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1048	static NV
		1049	ts_get (const struct timespec *ts)
891	{	1050	{
892	ssize_t res;	1051	return ts->tv_sec + ts->tv_nsec * 1e-9;
893	off_t ooffset;
894
895	X_LOCK (preadwritelock);
896	ooffset = lseek (fd, 0, SEEK_CUR);
897	lseek (fd, offset, SEEK_SET);
898	res = write (fd, buf, count);
899	lseek (fd, offset, SEEK_SET);
900	X_UNLOCK (preadwritelock);
901
902	return res;
903	}	1052	}
904	#endif
905		1053
906	#ifndef HAVE_FUTIMES	1054	/*****************************************************************************/
907		1055
908	# define utimes(path,times) aio_utimes (path, times)	1056	XS(boot_IO__AIO) ecb_cold;
909	# define futimes(fd,times) aio_futimes (fd, times)
910		1057
911	int aio_utimes (const char *filename, const struct timeval times[2])	1058	MODULE = IO::AIO PACKAGE = IO::AIO
912	{
913	if (times)
914	{
915	struct utimbuf buf;
916		1059
917	buf.actime = times[0].tv_sec;	1060	PROTOTYPES: ENABLE
918	buf.modtime = times[1].tv_sec;
919		1061
920	return utime (filename, &buf);	1062	BOOT:
921	}
922	else
923	return utime (filename, 0);
924	}
925
926	int aio_futimes (int fd, const struct timeval tv[2])
927	{	1063	{
928	errno = ENOSYS;	1064	static const struct {
929	return -1;	1065	const char *name;
930	}	1066	IV iv;
		1067	} *civ, const_iv[] = {
		1068	# define const_niv(name, value) { # name, (IV) value },
		1069	# define const_iv(name) { # name, (IV) name },
		1070	# define const_eio(name) { # name, (IV) EIO_ ## name },
931		1071
932	#endif	1072	/* you have to re-run ./gendef0 after adding/removing any constants here */
		1073	/* the first block can be undef if missing */
		1074	const_iv (ENOSYS)
		1075	const_iv (EXDEV)
		1076	const_iv (EBADR)
933		1077
934	#if !HAVE_FDATASYNC	1078	/* for lseek */
935	# define fdatasync fsync	1079	const_iv (SEEK_DATA)
936	#endif	1080	const_iv (SEEK_HOLE)
937		1081
938	#if !HAVE_READAHEAD	1082	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
939	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)	1083	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1084	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1085	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1086	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1087	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
940		1088
941	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)	1089	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
942	{	1090	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
943	size_t todo = count;	1091	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
944	dBUF;	1092	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1093	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
945		1094
946	while (todo > 0)	1095	/* the second block will be 0 when missing */
947	{	1096	const_iv (O_ACCMODE)
948	size_t len = todo < AIO_BUFSIZE ? todo : AIO_BUFSIZE;
949		1097
950	pread (fd, aio_buf, len, offset);	1098	const_iv (O_RDONLY)
951	offset += len;	1099	const_iv (O_WRONLY)
952	todo -= len;	1100	const_iv (O_RDWR)
953	}	1101	const_iv (O_CREAT)
		1102	const_iv (O_TRUNC)
		1103	const_iv (O_EXCL)
		1104	const_iv (O_APPEND)
954		1105
955	errno = 0;	1106	const_iv (O_ASYNC)
956	return count;	1107	const_iv (O_DIRECT)
957	}	1108	const_iv (O_NOATIME)
958		1109
959	#endif	1110	const_iv (O_CLOEXEC)
		1111	const_iv (O_NOCTTY)
		1112	const_iv (O_NOFOLLOW)
		1113	const_iv (O_NONBLOCK)
		1114	const_iv (O_EXEC)
		1115	const_iv (O_SEARCH)
		1116	const_iv (O_DIRECTORY)
		1117	const_iv (O_DSYNC)
		1118	const_iv (O_RSYNC)
		1119	const_iv (O_SYNC)
		1120	const_iv (O_PATH)
		1121	const_iv (O_TMPFILE)
		1122	const_iv (O_TTY_INIT)
960		1123
961	#if !HAVE_READDIR_R	1124	const_iv (S_IFIFO)
962	# define readdir_r aio_readdir_r	1125	const_iv (S_IFCHR)
		1126	const_iv (S_IFBLK)
		1127	const_iv (S_IFLNK)
		1128	const_iv (S_IFREG)
		1129	const_iv (S_IFDIR)
		1130	const_iv (S_IFWHT)
		1131	const_iv (S_IFSOCK)
		1132	const_iv (S_IFMT)
963		1133
964	static mutex_t readdirlock = X_MUTEX_INIT;	1134	const_iv (ST_RDONLY)
965		1135	const_iv (ST_NOSUID)
966	static int readdir_r (DIR *dirp, X_DIRENT *ent, X_DIRENT **res)	1136	const_iv (ST_NODEV)
967	{	1137	const_iv (ST_NOEXEC)
968	X_DIRENT *e;	1138	const_iv (ST_SYNCHRONOUS)
969	int errorno;	1139	const_iv (ST_MANDLOCK)
		1140	const_iv (ST_WRITE)
		1141	const_iv (ST_APPEND)
		1142	const_iv (ST_IMMUTABLE)
		1143	const_iv (ST_NOATIME)
		1144	const_iv (ST_NODIRATIME)
		1145	const_iv (ST_RELATIME)
970		1146
971	X_LOCK (readdirlock);	1147	const_iv (PROT_NONE)
		1148	const_iv (PROT_EXEC)
		1149	const_iv (PROT_READ)
		1150	const_iv (PROT_WRITE)
972		1151
973	e = readdir (dirp);	1152	const_iv (MAP_PRIVATE)
974	errorno = errno;	1153	const_iv (MAP_SHARED)
		1154	const_iv (MAP_FIXED)
		1155	const_iv (MAP_ANONYMOUS)
975		1156
976	if (e)	1157	/* linuxish */
977	{	1158	const_iv (MAP_LOCKED)
978	*res = ent;	1159	const_iv (MAP_NORESERVE)
979	strcpy (ent->d_name, e->d_name);	1160	const_iv (MAP_POPULATE)
980	}	1161	const_iv (MAP_NONBLOCK)
981	else	1162	const_iv (MAP_GROWSDOWN)
982	*res = 0;	1163	const_iv (MAP_32BIT)
		1164	const_iv (MAP_HUGETLB)
		1165	const_iv (MAP_STACK)
983		1166
984	X_UNLOCK (readdirlock);	1167	const_iv (MREMAP_MAYMOVE)
		1168	const_iv (MREMAP_FIXED)
985		1169
986	errno = errorno;	1170	const_iv (F_DUPFD_CLOEXEC)
987	return e ? 0 : -1;
988	}
989	#endif
990		1171
991	/* sendfile always needs emulation */	1172	const_iv (MSG_CMSG_CLOEXEC)
992	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)	1173	const_iv (SOCK_CLOEXEC)
993	{
994	ssize_t res;
995		1174
996	if (!count)	1175	const_iv (F_OFD_GETLK)
997	return 0;	1176	const_iv (F_OFD_SETLK)
		1177	const_iv (F_OFD_GETLKW)
998		1178
999	#if HAVE_SENDFILE	1179	const_iv (FIFREEZE)
1000	# if __linux	1180	const_iv (FITHAW)
1001	res = sendfile (ofd, ifd, &offset, count);	1181	const_iv (FITRIM)
		1182	const_iv (FICLONE)
		1183	const_iv (FICLONERANGE)
		1184	const_iv (FIDEDUPERANGE)
1002		1185
1003	# elif __freebsd	1186	const_iv (FS_IOC_GETFLAGS)
1004	/*	1187	const_iv (FS_IOC_SETFLAGS)
1005	* Of course, the freebsd sendfile is a dire hack with no thoughts	1188	const_iv (FS_IOC_GETVERSION)
1006	* wasted on making it similar to other I/O functions.	1189	const_iv (FS_IOC_SETVERSION)
1007	*/	1190	const_iv (FS_IOC_FIEMAP)
		1191	const_iv (FS_IOC_FSGETXATTR)
		1192	const_iv (FS_IOC_FSSETXATTR)
		1193	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1194	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1195	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1196
		1197	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1198
		1199	const_iv (FS_SECRM_FL)
		1200	const_iv (FS_UNRM_FL)
		1201	const_iv (FS_COMPR_FL)
		1202	const_iv (FS_SYNC_FL)
		1203	const_iv (FS_IMMUTABLE_FL)
		1204	const_iv (FS_APPEND_FL)
		1205	const_iv (FS_NODUMP_FL)
		1206	const_iv (FS_NOATIME_FL)
		1207	const_iv (FS_DIRTY_FL)
		1208	const_iv (FS_COMPRBLK_FL)
		1209	const_iv (FS_NOCOMP_FL)
		1210	const_iv (FS_ENCRYPT_FL)
		1211	const_iv (FS_BTREE_FL)
		1212	const_iv (FS_INDEX_FL)
		1213	const_iv (FS_JOURNAL_DATA_FL)
		1214	const_iv (FS_NOTAIL_FL)
		1215	const_iv (FS_DIRSYNC_FL)
		1216	const_iv (FS_TOPDIR_FL)
		1217	const_iv (FS_FL_USER_MODIFIABLE)
		1218
		1219	const_iv (FS_XFLAG_REALTIME)
		1220	const_iv (FS_XFLAG_PREALLOC)
		1221	const_iv (FS_XFLAG_IMMUTABLE)
		1222	const_iv (FS_XFLAG_APPEND)
		1223	const_iv (FS_XFLAG_SYNC)
		1224	const_iv (FS_XFLAG_NOATIME)
		1225	const_iv (FS_XFLAG_NODUMP)
		1226	const_iv (FS_XFLAG_RTINHERIT)
		1227	const_iv (FS_XFLAG_PROJINHERIT)
		1228	const_iv (FS_XFLAG_NOSYMLINKS)
		1229	const_iv (FS_XFLAG_EXTSIZE)
		1230	const_iv (FS_XFLAG_EXTSZINHERIT)
		1231	const_iv (FS_XFLAG_NODEFRAG)
		1232	const_iv (FS_XFLAG_FILESTREAM)
		1233	const_iv (FS_XFLAG_DAX)
		1234	const_iv (FS_XFLAG_HASATTR)
		1235
		1236	const_iv (FIEMAP_FLAG_SYNC)
		1237	const_iv (FIEMAP_FLAG_XATTR)
		1238	const_iv (FIEMAP_FLAGS_COMPAT)
		1239	const_iv (FIEMAP_EXTENT_LAST)
		1240	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1241	const_iv (FIEMAP_EXTENT_DELALLOC)
		1242	const_iv (FIEMAP_EXTENT_ENCODED)
		1243	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1244	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1245	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1246	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1247	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1248	const_iv (FIEMAP_EXTENT_MERGED)
		1249	const_iv (FIEMAP_EXTENT_SHARED)
		1250
		1251	const_iv (SPLICE_F_MOVE)
		1252	const_iv (SPLICE_F_NONBLOCK)
		1253	const_iv (SPLICE_F_MORE)
		1254	const_iv (SPLICE_F_GIFT)
		1255
		1256	const_iv (EFD_CLOEXEC)
		1257	const_iv (EFD_NONBLOCK)
		1258	const_iv (EFD_SEMAPHORE)
		1259
		1260	const_iv (CLOCK_REALTIME)
		1261	const_iv (CLOCK_MONOTONIC)
		1262	const_iv (CLOCK_BOOTTIME)
		1263	const_iv (CLOCK_REALTIME_ALARM)
		1264	const_iv (CLOCK_BOOTTIME_ALARM)
		1265
		1266	const_iv (TFD_NONBLOCK)
		1267	const_iv (TFD_CLOEXEC)
		1268
		1269	const_iv (TFD_TIMER_ABSTIME)
		1270	const_iv (TFD_TIMER_CANCEL_ON_SET)
		1271
		1272	/* these are libeio constants, and are independent of gendef0 */
		1273	const_eio (SEEK_SET)
		1274	const_eio (SEEK_CUR)
		1275	const_eio (SEEK_END)
		1276
		1277	const_eio (MCL_FUTURE)
		1278	const_eio (MCL_CURRENT)
		1279	const_eio (MCL_ONFAULT)
		1280
		1281	const_eio (MS_ASYNC)
		1282	const_eio (MS_INVALIDATE)
		1283	const_eio (MS_SYNC)
		1284
		1285	const_eio (MT_MODIFY)
		1286
		1287	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1288	const_eio (SYNC_FILE_RANGE_WRITE)
		1289	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1290
		1291	const_eio (FALLOC_FL_KEEP_SIZE)
		1292	const_eio (FALLOC_FL_PUNCH_HOLE)
		1293	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1294	const_eio (FALLOC_FL_ZERO_RANGE)
		1295	const_eio (FALLOC_FL_INSERT_RANGE)
		1296	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1297
		1298	const_eio (RENAME_NOREPLACE)
		1299	const_eio (RENAME_EXCHANGE)
		1300	const_eio (RENAME_WHITEOUT)
		1301
		1302	const_eio (READDIR_DENTS)
		1303	const_eio (READDIR_DIRS_FIRST)
		1304	const_eio (READDIR_STAT_ORDER)
		1305	const_eio (READDIR_FOUND_UNKNOWN)
		1306
		1307	const_eio (DT_UNKNOWN)
		1308	const_eio (DT_FIFO)
		1309	const_eio (DT_CHR)
		1310	const_eio (DT_DIR)
		1311	const_eio (DT_BLK)
		1312	const_eio (DT_REG)
		1313	const_eio (DT_LNK)
		1314	const_eio (DT_SOCK)
		1315	const_eio (DT_WHT)
		1316	};
		1317
		1318	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1319	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1320	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1321	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1322
		1323	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1324	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1325
		1326	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1327
		1328	/* allocate dummy pipe fd for aio_close */
1008	{	1329	{
1009	off_t sbytes;	1330	int pipefd [2];
1010	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
1011		1331
1012	if (res < 0 && sbytes)	1332	if (
1013	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */	1333	#ifdef _WIN32
1014	res = sbytes;	1334	_pipe (pipefd, 1, _O_BINARY) < 0
		1335	#else
		1336	pipe (pipefd) < 0
		1337	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1338	#endif
		1339	|| close (pipefd [1]) < 0
		1340	)
		1341	croak ("IO::AIO: unable to create dummy pipe for aio_close");
		1342
		1343	close_fd = pipefd [0];
1015	}	1344	}
1016		1345
1017	# elif __hpux	1346	reinit ();
1018	res = sendfile (ofd, ifd, offset, count, 0, 0);
1019
1020	# elif __solaris
1021	{
1022	struct sendfilevec vec;
1023	size_t sbytes;
1024
1025	vec.sfv_fd = ifd;
1026	vec.sfv_flag = 0;
1027	vec.sfv_off = offset;
1028	vec.sfv_len = count;
1029
1030	res = sendfilev (ofd, &vec, 1, &sbytes);
1031
1032	if (res < 0 && sbytes)
1033	res = sbytes;
1034	}
1035
1036	# endif
1037	#else
1038	res = -1;
1039	errno = ENOSYS;
1040	#endif
1041
1042	if (res < 0
1043	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
1044	#if __solaris
1045	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
1046	#endif
1047	)
1048	)
1049	{
1050	/* emulate sendfile. this is a major pain in the ass */
1051	dBUF;
1052
1053	res = 0;
1054
1055	while (count)
1056	{
1057	ssize_t cnt;
1058
1059	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
1060
1061	if (cnt <= 0)
1062	{
1063	if (cnt && !res) res = -1;
1064	break;
1065	}
1066
1067	cnt = write (ofd, aio_buf, cnt);
1068
1069	if (cnt <= 0)
1070	{
1071	if (cnt && !res) res = -1;
1072	break;
1073	}
1074
1075	offset += cnt;
1076	res += cnt;
1077	count -= cnt;
1078	}
1079	}
1080
1081	return res;
1082	}	1347	}
1083		1348
1084	/* read a full directory */
1085	static void scandir_ (aio_req req, worker *self)
1086	{
1087	DIR *dirp;
1088	union
1089	{
1090	X_DIRENT d;
1091	char b [offsetof (X_DIRENT, d_name) + NAME_MAX + 1];
1092	} *u;
1093	X_DIRENT *entp;
1094	char *name, *names;
1095	int memlen = 4096;
1096	int memofs = 0;
1097	int res = 0;
1098
1099	X_LOCK (wrklock);
1100	self->dirp = dirp = opendir (req->ptr1);
1101	self->dbuf = u = malloc (sizeof (*u));
1102	req->flags |= FLAG_PTR2_FREE;
1103	req->ptr2 = names = malloc (memlen);
1104	X_UNLOCK (wrklock);
1105
1106	if (dirp && u && names)
1107	for (;;)
1108	{
1109	errno = 0;
1110	readdir_r (dirp, &u->d, &entp);
1111
1112	if (!entp)
1113	break;
1114
1115	name = entp->d_name;
1116
1117	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1118	{
1119	int len = strlen (name) + 1;
1120
1121	res++;
1122
1123	while (memofs + len > memlen)
1124	{
1125	memlen *= 2;
1126	X_LOCK (wrklock);
1127	req->ptr2 = names = realloc (names, memlen);
1128	X_UNLOCK (wrklock);
1129
1130	if (!names)
1131	break;
1132	}
1133
1134	memcpy (names + memofs, name, len);
1135	memofs += len;
1136	}
1137	}
1138
1139	if (errno)
1140	res = -1;
1141
1142	req->result = res;
1143	}
1144
1145	/*****************************************************************************/
1146
1147	X_THREAD_PROC (aio_proc)
1148	{
1149	{//D
1150	aio_req req;
1151	struct timespec ts;
1152	worker *self = (worker *)thr_arg;
1153
1154	/* try to distribute timeouts somewhat randomly */
1155	ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL);
1156
1157	for (;;)
1158	{
1159	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1160
1161	X_LOCK (reqlock);
1162
1163	for (;;)
1164	{
1165	self->req = req = reqq_shift (&req_queue);
1166
1167	if (req)
1168	break;
1169
1170	++idle;
1171
1172	if (X_COND_TIMEDWAIT (reqwait, reqlock, ts)
1173	== ETIMEDOUT)
1174	{
1175	if (idle > max_idle)
1176	{
1177	--idle;
1178	X_UNLOCK (reqlock);
1179	X_LOCK (wrklock);
1180	--started;
1181	X_UNLOCK (wrklock);
1182	goto quit;
1183	}
1184
1185	/* we are allowed to idle, so do so without any timeout */
1186	X_COND_WAIT (reqwait, reqlock);
1187	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1188	}
1189
1190	--idle;
1191	}
1192
1193	--nready;
1194
1195	X_UNLOCK (reqlock);
1196
1197	errno = 0; /* strictly unnecessary */
1198
1199	if (!(req->flags & FLAG_CANCELLED))
1200	switch (req->type)
1201	{
1202	case REQ_READ: req->result = req->offs >= 0
1203	? pread (req->int1, req->ptr1, req->size, req->offs)
1204	: read (req->int1, req->ptr1, req->size); break;
1205	case REQ_WRITE: req->result = req->offs >= 0
1206	? pwrite (req->int1, req->ptr1, req->size, req->offs)
1207	: write (req->int1, req->ptr1, req->size); break;
1208
1209	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1210	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1211
1212	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1213	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1214	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1215
1216	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
1217	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
1218	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
1219	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
1220	case REQ_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break;
1221	case REQ_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break;
1222
1223	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1224	case REQ_CLOSE: req->result = close (req->int1); break;
1225	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1226	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1227	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1228	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1229	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1230	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1231	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1232	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1233
1234	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1235	case REQ_FSYNC: req->result = fsync (req->int1); break;
1236	case REQ_READDIR: scandir_ (req, self); break;
1237
1238	case REQ_BUSY:
1239	#ifdef _WIN32
1240	Sleep (req->nv1 * 1000.);
1241	#else
1242	{
1243	struct timeval tv;
1244
1245	tv.tv_sec = req->nv1;
1246	tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.;
1247
1248	req->result = select (0, 0, 0, 0, &tv);
1249	}
1250	#endif
1251	break;
1252
1253	case REQ_UTIME:
1254	case REQ_FUTIME:
1255	{
1256	struct timeval tv[2];
1257	struct timeval *times;
1258
1259	if (req->nv1 != -1. || req->nv2 != -1.)
1260	{
1261	tv[0].tv_sec = req->nv1;
1262	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
1263	tv[1].tv_sec = req->nv2;
1264	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
1265
1266	times = tv;
1267	}
1268	else
1269	times = 0;
1270
1271
1272	req->result = req->type == REQ_FUTIME
1273	? futimes (req->int1, times)
1274	: utimes (req->ptr1, times);
1275	}
1276
1277	case REQ_GROUP:
1278	case REQ_NOP:
1279	break;
1280
1281	case REQ_QUIT:
1282	goto quit;
1283
1284	default:
1285	req->result = -1;
1286	break;
1287	}
1288
1289	req->errorno = errno;
1290
1291	X_LOCK (reslock);
1292
1293	++npending;
1294
1295	if (!reqq_push (&res_queue, req))
1296	{
1297	/* write a dummy byte to the pipe so fh becomes ready */
1298	send (respipe_osf [1], (const void *)&respipe_osf, 1, 0);
1299
1300	/* optionally signal the main thread asynchronously */
1301	if (main_sig)
1302	pthread_kill (main_tid, main_sig);
1303	}
1304
1305	self->req = 0;
1306	worker_clear (self);
1307
1308	X_UNLOCK (reslock);
1309	}
1310
1311	quit:
1312	X_LOCK (wrklock);
1313	worker_free (self);
1314	X_UNLOCK (wrklock);
1315
1316	return 0;
1317	}//D
1318	}
1319
1320	/*****************************************************************************/
1321
1322	static void atfork_prepare (void)
1323	{
1324	X_LOCK (wrklock);
1325	X_LOCK (reqlock);
1326	X_LOCK (reslock);
1327	#if !HAVE_PREADWRITE
1328	X_LOCK (preadwritelock);
1329	#endif
1330	#if !HAVE_READDIR_R
1331	X_LOCK (readdirlock);
1332	#endif
1333	}
1334
1335	static void atfork_parent (void)
1336	{
1337	#if !HAVE_READDIR_R
1338	X_UNLOCK (readdirlock);
1339	#endif
1340	#if !HAVE_PREADWRITE
1341	X_UNLOCK (preadwritelock);
1342	#endif
1343	X_UNLOCK (reslock);
1344	X_UNLOCK (reqlock);
1345	X_UNLOCK (wrklock);
1346	}
1347
1348	static void atfork_child (void)
1349	{
1350	aio_req prv;
1351
1352	while (prv = reqq_shift (&req_queue))
1353	req_destroy (prv);
1354
1355	while (prv = reqq_shift (&res_queue))
1356	req_destroy (prv);
1357
1358	while (wrk_first.next != &wrk_first)
1359	{
1360	worker *wrk = wrk_first.next;
1361
1362	if (wrk->req)
1363	req_destroy (wrk->req);
1364
1365	worker_clear (wrk);
1366	worker_free (wrk);
1367	}
1368
1369	started = 0;
1370	idle = 0;
1371	nreqs = 0;
1372	nready = 0;
1373	npending = 0;
1374
1375	PerlSock_closesocket (respipe [0]);
1376	PerlSock_closesocket (respipe [1]);
1377
1378	create_pipe (respipe);
1379
1380	atfork_parent ();
1381	}
1382
1383	#define dREQ \
1384	aio_req req; \
1385	int req_pri = next_pri; \
1386	next_pri = DEFAULT_PRI + PRI_BIAS; \
1387	\
1388	if (SvOK (callback) && !SvROK (callback)) \
1389	croak ("callback must be undef or of reference type"); \
1390	\
1391	Newz (0, req, 1, aio_cb); \
1392	if (!req) \
1393	croak ("out of memory during aio_req allocation"); \
1394	\
1395	req->callback = newSVsv (callback); \
1396	req->pri = req_pri
1397
1398	#define REQ_SEND \
1399	req_send (req); \
1400	\
1401	if (GIMME_V != G_VOID) \
1402	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1403
1404	MODULE = IO::AIO PACKAGE = IO::AIO
1405
1406	PROTOTYPES: ENABLE
1407
1408	BOOT:
1409	{
1410	HV *stash = gv_stashpv ("IO::AIO", 1);
1411
1412	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1413	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1414	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1415	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1416	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1417	#ifdef _WIN32
1418	X_MUTEX_CHECK (wrklock);
1419	X_MUTEX_CHECK (reslock);
1420	X_MUTEX_CHECK (reqlock);
1421	X_MUTEX_CHECK (reqwait);
1422	X_MUTEX_CHECK (preadwritelock);
1423	X_MUTEX_CHECK (readdirlock);
1424
1425	X_COND_CHECK (reqwait);
1426	#else
1427	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1428	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1429	#endif
1430
1431	create_pipe (respipe);
1432
1433	X_THREAD_ATFORK (atfork_prepare, atfork_parent, atfork_child);
1434	}
1435
1436	void	1349	void
		1350	reinit ()
		1351	PROTOTYPE:
		1352
		1353	void
1437	max_poll_reqs (int nreqs)	1354	max_poll_reqs (unsigned int nreqs)
1438	PROTOTYPE: $	1355	PROTOTYPE: $
1439	CODE:	1356	CODE:
1440	max_poll_reqs = nreqs;	1357	eio_set_max_poll_reqs (nreqs);
1441		1358
1442	void	1359	void
1443	max_poll_time (double nseconds)	1360	max_poll_time (double nseconds)
1444	PROTOTYPE: $	1361	PROTOTYPE: $
1445	CODE:	1362	CODE:
1446	max_poll_time = nseconds * AIO_TICKS;	1363	eio_set_max_poll_time (nseconds);
1447		1364
1448	void	1365	void
1449	min_parallel (int nthreads)	1366	min_parallel (unsigned int nthreads)
1450	PROTOTYPE: $
1451
1452	void
1453	max_parallel (int nthreads)
1454	PROTOTYPE: $
1455
1456	void
1457	max_idle (int nthreads)
1458	PROTOTYPE: $	1367	PROTOTYPE: $
1459	CODE:	1368	CODE:
1460	set_max_idle (nthreads);	1369	eio_set_min_parallel (nthreads);
1461		1370
1462	int	1371	void
1463	max_outstanding (int maxreqs)	1372	max_parallel (unsigned int nthreads)
1464	PROTOTYPE: $	1373	PROTOTYPE: $
1465	CODE:	1374	CODE:
1466	RETVAL = max_outstanding;	1375	eio_set_max_parallel (nthreads);
		1376
		1377	void
		1378	max_idle (unsigned int nthreads)
		1379	PROTOTYPE: $
		1380	CODE:
		1381	eio_set_max_idle (nthreads);
		1382
		1383	void
		1384	idle_timeout (unsigned int seconds)
		1385	PROTOTYPE: $
		1386	CODE:
		1387	eio_set_idle_timeout (seconds);
		1388
		1389	void
		1390	max_outstanding (unsigned int maxreqs)
		1391	PROTOTYPE: $
		1392	CODE:
1467	max_outstanding = maxreqs;	1393	max_outstanding = maxreqs;
1468	OUTPUT:
1469	RETVAL
1470		1394
1471	void	1395	void
1472	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)	1396	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
1473	PROTOTYPE: $$$;$
1474	PPCODE:	1397	PPCODE:
1475	{	1398	{
1476	dREQ;	1399	dREQ;
1477		1400
		1401	req->type = EIO_WD_OPEN;
		1402	req_set_path1 (req, pathname);
		1403
		1404	REQ_SEND;
		1405	}
		1406
		1407	void
		1408	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1409	PPCODE:
		1410	{
		1411	dREQ;
		1412
1478	req->type = REQ_OPEN;	1413	req->type = EIO_OPEN;
1479	req->sv1 = newSVsv (pathname);	1414	req_set_path1 (req, pathname);
1480	req->ptr1 = SvPVbyte_nolen (req->sv1);
1481	req->int1 = flags;	1415	req->int1 = flags;
1482	req->mode = mode;	1416	req->int2 = mode;
1483		1417
1484	REQ_SEND;	1418	REQ_SEND;
1485	}	1419	}
1486		1420
1487	void	1421	void
1488	aio_close (SV *fh, SV *callback=&PL_sv_undef)	1422	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
1489	PROTOTYPE: $;$
1490	ALIAS:	1423	ALIAS:
1491	aio_close = REQ_CLOSE
1492	aio_fsync = REQ_FSYNC	1424	aio_fsync = EIO_FSYNC
1493	aio_fdatasync = REQ_FDATASYNC	1425	aio_fdatasync = EIO_FDATASYNC
		1426	aio_syncfs = EIO_SYNCFS
1494	PPCODE:	1427	PPCODE:
1495	{	1428	{
		1429	int fd = s_fileno_croak (fh, 0);
1496	dREQ;	1430	dREQ;
1497		1431
1498	req->type = ix;	1432	req->type = ix;
1499	req->sv1 = newSVsv (fh);	1433	req->sv1 = newSVsv (fh);
1500	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1434	req->int1 = fd;
1501		1435
1502	REQ_SEND (req);	1436	REQ_SEND;
1503	}	1437	}
1504		1438
1505	void	1439	void
		1440	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1441	PPCODE:
		1442	{
		1443	int fd = s_fileno_croak (fh, 0);
		1444	dREQ;
		1445
		1446	req->type = EIO_SYNC_FILE_RANGE;
		1447	req->sv1 = newSVsv (fh);
		1448	req->int1 = fd;
		1449	req->offs = offset;
		1450	req->size = nbytes;
		1451	req->int2 = flags;
		1452
		1453	REQ_SEND;
		1454	}
		1455
		1456	void
		1457	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1458	PPCODE:
		1459	{
		1460	int fd = s_fileno_croak (fh, 0);
		1461	dREQ;
		1462
		1463	req->type = EIO_FALLOCATE;
		1464	req->sv1 = newSVsv (fh);
		1465	req->int1 = fd;
		1466	req->int2 = mode;
		1467	req->offs = offset;
		1468	req->size = len;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	void
		1474	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1475	PPCODE:
		1476	{
		1477	dREQ;
		1478	int fd = s_fileno_croak (fh, 0);
		1479
		1480	/* partially duplicate logic in s_fileno */
		1481	SvGETMAGIC (fh);
		1482
		1483	if (SvROK (fh))
		1484	{
		1485	fh = SvRV (fh);
		1486	SvGETMAGIC (fh);
		1487	}
		1488
		1489	if (SvTYPE (fh) == SVt_PVGV)
		1490	{
		1491	/* perl filehandle */
		1492	PerlIOUnix_refcnt_inc (fd);
		1493	do_close ((GV *)fh, 1);
		1494
		1495	req->type = EIO_CLOSE;
		1496	req->int1 = fd;
		1497	req->sv2 = newSVsv (fh);
		1498	}
		1499	else
		1500	{
		1501	/* fd number */
		1502	req->type = EIO_DUP2;
		1503	req->int1 = close_fd;
		1504	req->sv2 = newSVsv (fh);
		1505	req->int2 = fd;
		1506	}
		1507
		1508	REQ_SEND;
		1509	}
		1510
		1511	void
		1512	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1513	PPCODE:
		1514	{
		1515	int fd = s_fileno_croak (fh, 0);
		1516	dREQ;
		1517
		1518	req->type = EIO_SEEK;
		1519	req->sv1 = newSVsv (fh);
		1520	req->int1 = fd;
		1521	req->offs = SvVAL64 (offset);
		1522	req->int2 = whence;
		1523
		1524	REQ_SEND;
		1525	}
		1526
		1527	void
1506	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)	1528	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1507	ALIAS:	1529	ALIAS:
1508	aio_read = REQ_READ	1530	aio_read = EIO_READ
1509	aio_write = REQ_WRITE	1531	aio_write = EIO_WRITE
1510	PROTOTYPE: $$$$$;$
1511	PPCODE:	1532	PPCODE:
1512	{	1533	{
1513	STRLEN svlen;	1534	STRLEN svlen;
		1535	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1514	char *svptr = SvPVbyte (data, svlen);	1536	char *svptr = SvPVbyte (data, svlen);
1515	UV len = SvUV (length);	1537	UV len = SvUV (length);
1516		1538
1517	SvUPGRADE (data, SVt_PV);
1518	SvPOK_on (data);
1519
1520	if (dataoffset < 0)	1539	if (dataoffset < 0)
1521	dataoffset += svlen;	1540	dataoffset += svlen;
1522		1541
1523	if (dataoffset < 0 || dataoffset > svlen)	1542	if (dataoffset < 0 || dataoffset > svlen)
1524	croak ("dataoffset outside of data scalar");	1543	croak ("dataoffset outside of data scalar");
1525		1544
1526	if (ix == REQ_WRITE)	1545	if (ix == EIO_WRITE)
1527	{	1546	{
1528	/* write: check length and adjust. */	1547	/* write: check length and adjust. */
1529	if (!SvOK (length) || len + dataoffset > svlen)	1548	if (!SvOK (length) || len + dataoffset > svlen)
1530	len = svlen - dataoffset;	1549	len = svlen - dataoffset;
1531	}	1550	}
1532	else	1551	else
1533	{	1552	{
1534	/* read: grow scalar as necessary */	1553	/* read: check type and grow scalar as necessary */
		1554	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1535	svptr = SvGROW (data, len + dataoffset + 1);	1555	svptr = sv_grow (data, len + dataoffset + 1);
		1556	else if (SvCUR (data) < len + dataoffset)
		1557	croak ("length + dataoffset outside of scalar, and cannot grow");
1536	}	1558	}
1537
1538	if (len < 0)
1539	croak ("length must not be negative");
1540		1559
1541	{	1560	{
1542	dREQ;	1561	dREQ;
1543		1562
1544	req->type = ix;	1563	req->type = ix;
1545	req->sv1 = newSVsv (fh);	1564	req->sv1 = newSVsv (fh);
1546	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1565	req->int1 = fd;
1547	: IoOFP (sv_2io (fh)));
1548	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;	1566	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1549	req->size = len;	1567	req->size = len;
1550	req->sv2 = SvREFCNT_inc (data);	1568	req->sv2 = SvREFCNT_inc (data);
1551	req->ptr1 = (char *)svptr + dataoffset;	1569	req->ptr2 = (char *)svptr + dataoffset;
1552	req->stroffset = dataoffset;	1570	req->stroffset = dataoffset;
1553		1571
1554	if (!SvREADONLY (data))	1572	if (!SvREADONLY (data))
1555	{	1573	{
1556	SvREADONLY_on (data);	1574	SvREADONLY_on (data);
…		…
1560	REQ_SEND;	1578	REQ_SEND;
1561	}	1579	}
1562	}	1580	}
1563		1581
1564	void	1582	void
1565	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)	1583	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1566	PROTOTYPE: $$;$	1584	ALIAS:
		1585	aio_ioctl = EIO_IOCTL
		1586	aio_fcntl = EIO_FCNTL
1567	PPCODE:	1587	PPCODE:
1568	{	1588	{
1569	SV *data;	1589	int fd = s_fileno_croak (fh, 0);
1570	dREQ;	1590	char *svptr;
1571		1591
1572	data = newSV (NAME_MAX);	1592	if (SvPOK (arg) || !SvNIOK (arg))
1573	SvPOK_on (data);
1574
1575	req->type = REQ_READLINK;
1576	req->sv1 = newSVsv (path);
1577	req->ptr2 = SvPVbyte_nolen (req->sv1);
1578	req->sv2 = data;
1579	req->ptr1 = SvPVbyte_nolen (data);
1580
1581	REQ_SEND;
1582	}
1583
1584	void
1585	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1586	PROTOTYPE: $$$$;$
1587	PPCODE:
1588	{
1589	dREQ;
1590
1591	req->type = REQ_SENDFILE;
1592	req->sv1 = newSVsv (out_fh);
1593	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1594	req->sv2 = newSVsv (in_fh);
1595	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1596	req->offs = SvVAL64 (in_offset);
1597	req->size = length;
1598
1599	REQ_SEND;
1600	}
1601
1602	void
1603	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1604	PROTOTYPE: $$$;$
1605	PPCODE:
1606	{
1607	dREQ;
1608
1609	req->type = REQ_READAHEAD;
1610	req->sv1 = newSVsv (fh);
1611	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1612	req->offs = SvVAL64 (offset);
1613	req->size = length;
1614
1615	REQ_SEND;
1616	}
1617
1618	void
1619	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1620	ALIAS:
1621	aio_stat = REQ_STAT
1622	aio_lstat = REQ_LSTAT
1623	PPCODE:
1624	{
1625	dREQ;
1626
1627	req->ptr2 = malloc (sizeof (Stat_t));
1628	if (!req->ptr2)
1629	{	1593	{
1630	req_destroy (req);	1594	STRLEN svlen;
1631	croak ("out of memory during aio_stat statdata allocation");	1595	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
1632	}	1596	#ifdef IOCPARM_LEN
		1597	STRLEN need = IOCPARM_LEN (request);
		1598	#else
		1599	STRLEN need = 256;
		1600	#endif
1633		1601
1634	req->flags |= FLAG_PTR2_FREE;	1602	if (svlen < need)
1635	req->sv1 = newSVsv (fh_or_path);	1603	svptr = SvGROW (arg, need);
1636
1637	if (SvPOK (fh_or_path))
1638	{
1639	req->type = ix;
1640	req->ptr1 = SvPVbyte_nolen (req->sv1);
1641	}	1604	}
1642	else	1605	else
		1606	svptr = (char *)SvIV (arg);
		1607
1643	{	1608	{
		1609	dREQ;
		1610
1644	req->type = REQ_FSTAT;	1611	req->type = ix;
1645	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1612	req->sv1 = newSVsv (fh);
		1613	req->int1 = fd;
		1614	req->int2 = (long)request;
		1615	req->sv2 = SvREFCNT_inc (arg);
		1616	req->ptr2 = svptr;
		1617
		1618	REQ_SEND;
1646	}	1619	}
		1620	}
		1621
		1622	void
		1623	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1624	ALIAS:
		1625	aio_readlink = EIO_READLINK
		1626	aio_realpath = EIO_REALPATH
		1627	PPCODE:
		1628	{
		1629	dREQ;
		1630
		1631	req->type = ix;
		1632	req_set_path1 (req, pathname);
1647		1633
1648	REQ_SEND;	1634	REQ_SEND;
1649	}	1635	}
1650		1636
1651	void	1637	void
		1638	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1639	PPCODE:
		1640	{
		1641	int ifd = s_fileno_croak (in_fh , 0);
		1642	int ofd = s_fileno_croak (out_fh, 1);
		1643	dREQ;
		1644
		1645	req->type = EIO_SENDFILE;
		1646	req->sv1 = newSVsv (out_fh);
		1647	req->int1 = ofd;
		1648	req->sv2 = newSVsv (in_fh);
		1649	req->int2 = ifd;
		1650	req->offs = in_offset;
		1651	req->size = length;
		1652
		1653	REQ_SEND;
		1654	}
		1655
		1656	void
		1657	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1658	PPCODE:
		1659	{
		1660	int fd = s_fileno_croak (fh, 0);
		1661	dREQ;
		1662
		1663	req->type = EIO_READAHEAD;
		1664	req->sv1 = newSVsv (fh);
		1665	req->int1 = fd;
		1666	req->offs = offset;
		1667	req->size = length;
		1668
		1669	REQ_SEND;
		1670	}
		1671
		1672	void
		1673	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1674	ALIAS:
		1675	aio_stat = EIO_STAT
		1676	aio_lstat = EIO_LSTAT
		1677	aio_statvfs = EIO_STATVFS
		1678	PPCODE:
		1679	{
		1680	dREQ;
		1681
		1682	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1683
		1684	REQ_SEND;
		1685	}
		1686
		1687	void
		1688	st_xtime ()
		1689	ALIAS:
		1690	st_atime = 0x01
		1691	st_mtime = 0x02
		1692	st_ctime = 0x04
		1693	st_btime = 0x08
		1694	st_xtime = 0x0f
		1695	PPCODE:
		1696	EXTEND (SP, 4);
		1697	if (ix & 0x01) PUSHs (newSVnv (PL_statcache.st_atime + 1e-9 * ATIMENSEC));
		1698	if (ix & 0x02) PUSHs (newSVnv (PL_statcache.st_mtime + 1e-9 * MTIMENSEC));
		1699	if (ix & 0x04) PUSHs (newSVnv (PL_statcache.st_ctime + 1e-9 * CTIMENSEC));
		1700	if (ix & 0x08) PUSHs (newSVnv (BTIMESEC + 1e-9 * BTIMENSEC));
		1701
		1702	void
		1703	st_xtimensec ()
		1704	ALIAS:
		1705	st_atimensec = 0x01
		1706	st_mtimensec = 0x02
		1707	st_ctimensec = 0x04
		1708	st_btimensec = 0x08
		1709	st_xtimensec = 0x0f
		1710	st_btimesec = 0x10
		1711	st_gen = 0x20
		1712	PPCODE:
		1713	EXTEND (SP, 4);
		1714	if (ix & 0x01) PUSHs (newSViv (ATIMENSEC));
		1715	if (ix & 0x02) PUSHs (newSViv (MTIMENSEC));
		1716	if (ix & 0x04) PUSHs (newSViv (CTIMENSEC));
		1717	if (ix & 0x08) PUSHs (newSViv (BTIMENSEC));
		1718	if (ix & 0x10) PUSHs (newSVuv (BTIMESEC));
		1719	if (ix & 0x20) PUSHs (newSVuv (ST_GEN));
		1720
		1721	UV
		1722	major (UV dev)
		1723	ALIAS:
		1724	minor = 1
		1725	CODE:
		1726	RETVAL = ix ? minor (dev) : major (dev);
		1727	OUTPUT:
		1728	RETVAL
		1729
		1730	UV
		1731	makedev (UV maj, UV min)
		1732	CODE:
		1733	RETVAL = makedev (maj, min);
		1734	OUTPUT:
		1735	RETVAL
		1736
		1737	void
1652	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)	1738	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
1653	PPCODE:	1739	PPCODE:
1654	{	1740	{
1655	dREQ;	1741	dREQ;
1656		1742
1657	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;	1743	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1658	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;	1744	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1659	req->sv1 = newSVsv (fh_or_path);	1745	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
1660
1661	if (SvPOK (fh_or_path))
1662	{
1663	req->type = REQ_UTIME;
1664	req->ptr1 = SvPVbyte_nolen (req->sv1);
1665	}
1666	else
1667	{
1668	req->type = REQ_FUTIME;
1669	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1670	}
1671		1746
1672	REQ_SEND;	1747	REQ_SEND;
1673	}	1748	}
1674		1749
1675	void	1750	void
1676	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)	1751	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
1677	PPCODE:	1752	PPCODE:
1678	{	1753	{
1679	dREQ;	1754	dREQ;
1680		1755
1681	req->sv1 = newSVsv (fh_or_path);
1682	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;	1756	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1683		1757	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
1684	if (SvPOK (fh_or_path))
1685	{
1686	req->type = REQ_TRUNCATE;
1687	req->ptr1 = SvPVbyte_nolen (req->sv1);
1688	}
1689	else
1690	{
1691	req->type = REQ_FTRUNCATE;
1692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1693	}
1694		1758
1695	REQ_SEND;	1759	REQ_SEND;
1696	}	1760	}
1697		1761
1698	void	1762	void
1699	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)	1763	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
1700	PPCODE:	1764	PPCODE:
1701	{	1765	{
1702	dREQ;	1766	dREQ;
1703		1767
1704	req->mode = mode;	1768	req->int2 = mode;
1705	req->sv1 = newSVsv (fh_or_path);	1769	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
1706
1707	if (SvPOK (fh_or_path))
1708	{
1709	req->type = REQ_CHMOD;
1710	req->ptr1 = SvPVbyte_nolen (req->sv1);
1711	}
1712	else
1713	{
1714	req->type = REQ_FCHMOD;
1715	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1716	}
1717		1770
1718	REQ_SEND;	1771	REQ_SEND;
1719	}	1772	}
1720		1773
1721	void	1774	void
1722	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)	1775	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
1723	PPCODE:	1776	PPCODE:
1724	{	1777	{
1725	dREQ;	1778	dREQ;
1726		1779
1727	req->int2 = SvOK (uid) ? SvIV (uid) : -1;	1780	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1728	req->int3 = SvOK (gid) ? SvIV (gid) : -1;	1781	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1729	req->sv1 = newSVsv (fh_or_path);	1782	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
1730
1731	if (SvPOK (fh_or_path))
1732	{
1733	req->type = REQ_CHOWN;
1734	req->ptr1 = SvPVbyte_nolen (req->sv1);
1735	}
1736	else
1737	{
1738	req->type = REQ_FCHOWN;
1739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1740	}
1741		1783
1742	REQ_SEND;	1784	REQ_SEND;
1743	}	1785	}
1744		1786
1745	void	1787	void
		1788	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1789	PPCODE:
		1790	{
		1791	dREQ;
		1792
		1793	req->type = EIO_READDIR;
		1794	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1795
		1796	if (flags & EIO_READDIR_DENTS)
		1797	req->int1 |= EIO_READDIR_CUSTOM2;
		1798
		1799	req_set_path1 (req, pathname);
		1800
		1801	REQ_SEND;
		1802	}
		1803
		1804	void
		1805	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1806	PPCODE:
		1807	{
		1808	dREQ;
		1809
		1810	req->type = EIO_MKDIR;
		1811	req->int2 = mode;
		1812	req_set_path1 (req, pathname);
		1813
		1814	REQ_SEND;
		1815	}
		1816
		1817	void
1746	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)	1818	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1747	ALIAS:	1819	ALIAS:
1748	aio_unlink = REQ_UNLINK	1820	aio_unlink = EIO_UNLINK
1749	aio_rmdir = REQ_RMDIR	1821	aio_rmdir = EIO_RMDIR
1750	aio_readdir = REQ_READDIR	1822	aio_readdir = EIO_READDIR
1751	PPCODE:	1823	PPCODE:
1752	{	1824	{
1753	dREQ;	1825	dREQ;
1754		1826
1755	req->type = ix;	1827	req->type = ix;
1756	req->sv1 = newSVsv (pathname);	1828	req_set_path1 (req, pathname);
1757	req->ptr1 = SvPVbyte_nolen (req->sv1);
1758		1829
1759	REQ_SEND;	1830	REQ_SEND;
1760	}	1831	}
1761		1832
1762	void	1833	void
1763	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)	1834	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
		1835	ALIAS:
		1836	aio_link = EIO_LINK
		1837	aio_symlink = EIO_SYMLINK
		1838	aio_rename = EIO_RENAME
1764	PPCODE:	1839	PPCODE:
1765	{	1840	{
1766	dREQ;	1841	eio_wd wd2 = 0;
1767
1768	req->type = REQ_MKDIR;
1769	req->sv1 = newSVsv (pathname);
1770	req->ptr1 = SvPVbyte_nolen (req->sv1);
1771	req->mode = mode;
1772
1773	REQ_SEND;
1774	}
1775
1776	void
1777	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1778	ALIAS:
1779	aio_link = REQ_LINK
1780	aio_symlink = REQ_SYMLINK
1781	aio_rename = REQ_RENAME
1782	PPCODE:
1783	{
1784	dREQ;	1842	dREQ;
1785		1843
1786	req->type = ix;	1844	req->type = ix;
1787	req->sv2 = newSVsv (oldpath);	1845	req_set_path1 (req, oldpath);
1788	req->ptr2 = SvPVbyte_nolen (req->sv2);	1846	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1789	req->sv1 = newSVsv (newpath);	1847	req->int3 = (long)wd2;
1790	req->ptr1 = SvPVbyte_nolen (req->sv1);
1791		1848
1792	REQ_SEND;	1849	REQ_SEND;
1793	}	1850	}
1794		1851
1795	void	1852	void
1796	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)	1853	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1797	PPCODE:	1854	PPCODE:
1798	{	1855	{
		1856	eio_wd wd2 = 0;
1799	dREQ;	1857	dREQ;
1800		1858
1801	req->type = REQ_MKNOD;	1859	req->type = EIO_RENAME;
1802	req->sv1 = newSVsv (pathname);	1860	req_set_path1 (req, oldpath);
1803	req->ptr1 = SvPVbyte_nolen (req->sv1);	1861	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1804	req->mode = (mode_t)mode;	1862	req->int2 = flags;
1805	req->offs = dev;	1863	req->int3 = (long)wd2;
1806		1864
1807	REQ_SEND;	1865	REQ_SEND;
1808	}	1866	}
1809		1867
1810	void	1868	void
1811	aio_busy (double delay, SV *callback=&PL_sv_undef)	1869	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1812	PPCODE:	1870	PPCODE:
1813	{	1871	{
1814	dREQ;	1872	dREQ;
		1873
		1874	req->type = EIO_MKNOD;
		1875	req->int2 = (mode_t)mode;
		1876	req->offs = dev;
		1877	req_set_path1 (req, pathname);
		1878
		1879	REQ_SEND;
		1880	}
1815		1881
		1882	void
		1883	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1884	ALIAS:
		1885	aio_mtouch = EIO_MTOUCH
		1886	aio_msync = EIO_MSYNC
		1887	PPCODE:
		1888	{
		1889	STRLEN svlen;
		1890	char *svptr = SvPVbyte (data, svlen);
		1891	UV len = SvUV (length);
		1892
		1893	if (flags < 0)
		1894	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1895
		1896	if (offset < 0)
		1897	offset += svlen;
		1898
		1899	if (offset < 0 || offset > svlen)
		1900	croak ("offset outside of scalar");
		1901
		1902	if (!SvOK (length) || len + offset > svlen)
		1903	len = svlen - offset;
		1904
		1905	{
		1906	dREQ;
		1907
		1908	req->type = ix;
		1909	req->sv2 = SvREFCNT_inc (data);
		1910	req->ptr2 = (char *)svptr + offset;
		1911	req->size = len;
		1912	req->int1 = flags;
		1913
		1914	REQ_SEND;
		1915	}
		1916	}
		1917
		1918	void
		1919	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1920	PPCODE:
		1921	{
		1922	STRLEN svlen;
		1923	char *svptr = SvPVbyte (data, svlen);
		1924	UV len = SvUV (length);
		1925
		1926	if (offset < 0)
		1927	offset += svlen;
		1928
		1929	if (offset < 0 || offset > svlen)
		1930	croak ("offset outside of scalar");
		1931
		1932	if (!SvOK (length) || len + offset > svlen)
		1933	len = svlen - offset;
		1934
		1935	{
		1936	dREQ;
		1937
		1938	req->type = EIO_MLOCK;
		1939	req->sv2 = SvREFCNT_inc (data);
		1940	req->ptr2 = (char *)svptr + offset;
		1941	req->size = len;
		1942
		1943	REQ_SEND;
		1944	}
		1945	}
		1946
		1947	void
		1948	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1949	PPCODE:
		1950	{
		1951	dREQ;
		1952
		1953	req->type = EIO_MLOCKALL;
		1954	req->int1 = flags;
		1955
		1956	REQ_SEND;
		1957	}
		1958
		1959	void
		1960	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1961	PPCODE:
		1962	{
		1963	int fd = s_fileno_croak (fh, 0);
		1964	dREQ;
		1965
		1966	req->type = EIO_CUSTOM;
		1967	req->sv1 = newSVsv (fh);
		1968	req->int1 = fd;
		1969
		1970	req->feed = fiemap;
		1971	#if HAVE_FIEMAP
		1972	/* keep our fingers crossed that the next two types are 64 bit */
		1973	req->offs = start;
		1974	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1975	req->int2 = flags;
		1976	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1977	#endif
		1978
		1979	REQ_SEND;
		1980	}
		1981
		1982	void
		1983	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		1984	PPCODE:
		1985	{
		1986	char *svptr = 0;
		1987
		1988	sv_clear_foreign (data);
		1989
		1990	if (length) /* known length, directly read into scalar */
		1991	{
		1992	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1993	svptr = sv_grow (data, length + 1);
		1994	else if (SvCUR (data) < length)
		1995	croak ("length outside of scalar, and cannot grow");
		1996	else
		1997	svptr = SvPVbyte_nolen (data);
		1998	}
		1999
		2000	{
		2001	dREQ;
		2002
		2003	req->type = EIO_SLURP;
		2004	req_set_path1 (req, pathname);
		2005	req->offs = offset;
		2006	req->size = length;
		2007	req->sv2 = SvREFCNT_inc (data);
		2008	req->ptr2 = svptr;
		2009
		2010	if (!SvREADONLY (data))
		2011	{
		2012	SvREADONLY_on (data);
		2013	req->flags |= FLAG_SV2_RO_OFF;
		2014	}
		2015
		2016	REQ_SEND;
		2017	}
		2018	}
		2019
		2020	void
		2021	aio_busy (double delay, SV *callback = &PL_sv_undef)
		2022	PPCODE:
		2023	{
		2024	dREQ;
		2025
1816	req->type = REQ_BUSY;	2026	req->type = EIO_BUSY;
1817	req->nv1 = delay < 0. ? 0. : delay;	2027	req->nv1 = delay < 0. ? 0. : delay;
1818		2028
1819	REQ_SEND;	2029	REQ_SEND;
1820	}	2030	}
1821		2031
1822	void	2032	void
1823	aio_group (SV *callback=&PL_sv_undef)	2033	aio_group (SV *callback = &PL_sv_undef)
1824	PROTOTYPE: ;$
1825	PPCODE:	2034	PPCODE:
1826	{	2035	{
1827	dREQ;	2036	dREQ;
1828		2037
1829	req->type = REQ_GROUP;	2038	req->type = EIO_GROUP;
1830		2039
		2040	PUTBACK;
1831	req_send (req);	2041	req_submit (req);
		2042	SPAGAIN;
		2043
1832	XPUSHs (req_sv (req, AIO_GRP_KLASS));	2044	XPUSHs (req_sv (req, aio_grp_stash));
1833	}	2045	}
1834		2046
1835	void	2047	void
1836	aio_nop (SV *callback=&PL_sv_undef)	2048	aio_nop (SV *callback = &PL_sv_undef)
		2049	ALIAS:
		2050	aio_nop = EIO_NOP
		2051	aio_sync = EIO_SYNC
1837	PPCODE:	2052	PPCODE:
1838	{	2053	{
1839	dREQ;	2054	dREQ;
1840		2055
1841	req->type = REQ_NOP;	2056	req->type = ix;
1842		2057
1843	REQ_SEND;	2058	REQ_SEND;
1844	}	2059	}
1845		2060
1846	int	2061	int
1847	aioreq_pri (int pri = 0)	2062	aioreq_pri (int pri = NO_INIT)
1848	PROTOTYPE: ;$
1849	CODE:	2063	CODE:
1850	RETVAL = next_pri - PRI_BIAS;	2064	RETVAL = next_pri;
1851	if (items > 0)	2065	if (items > 0)
1852	{	2066	{
1853	if (pri < PRI_MIN) pri = PRI_MIN;	2067	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1854	if (pri > PRI_MAX) pri = PRI_MAX;	2068	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1855	next_pri = pri + PRI_BIAS;	2069	next_pri = pri;
1856	}	2070	}
1857	OUTPUT:	2071	OUTPUT:
1858	RETVAL	2072	RETVAL
1859		2073
1860	void	2074	void
1861	aioreq_nice (int nice = 0)	2075	aioreq_nice (int nice = 0)
1862	CODE:	2076	CODE:
1863	nice = next_pri - nice;	2077	nice = next_pri - nice;
1864	if (nice < PRI_MIN) nice = PRI_MIN;	2078	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1865	if (nice > PRI_MAX) nice = PRI_MAX;	2079	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1866	next_pri = nice + PRI_BIAS;	2080	next_pri = nice;
1867		2081
1868	void	2082	void
1869	flush ()	2083	flush ()
1870	PROTOTYPE:
1871	CODE:	2084	CODE:
1872	while (nreqs)	2085	while (eio_nreqs ())
1873	{	2086	{
1874	poll_wait ();	2087	poll_wait ();
1875	poll_cb ();	2088	poll_cb ();
1876	}	2089	}
1877		2090
1878	int	2091	int
1879	poll()	2092	poll ()
1880	PROTOTYPE:
1881	CODE:	2093	CODE:
1882	poll_wait ();	2094	poll_wait ();
1883	RETVAL = poll_cb ();	2095	RETVAL = poll_cb ();
1884	OUTPUT:	2096	OUTPUT:
1885	RETVAL	2097	RETVAL
1886		2098
1887	int	2099	int
1888	poll_fileno()	2100	poll_fileno ()
1889	PROTOTYPE:
1890	CODE:	2101	CODE:
1891	RETVAL = respipe [0];	2102	RETVAL = s_epipe_fd (&respipe);
1892	OUTPUT:	2103	OUTPUT:
1893	RETVAL	2104	RETVAL
1894		2105
1895	int	2106	int
1896	poll_cb(...)	2107	poll_cb (...)
1897	PROTOTYPE:	2108	PROTOTYPE:
1898	CODE:	2109	CODE:
1899	RETVAL = poll_cb ();	2110	RETVAL = poll_cb ();
1900	OUTPUT:	2111	OUTPUT:
1901	RETVAL	2112	RETVAL
1902		2113
1903	void	2114	void
1904	poll_wait()	2115	poll_wait ()
1905	PROTOTYPE:
1906	CODE:	2116	CODE:
1907	poll_wait ();	2117	poll_wait ();
1908		2118
1909	void
1910	setsig (int signum = SIGIO)
1911	PROTOTYPE: ;$
1912	CODE:
1913	{
1914	if (block_sig_level)
1915	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1916
1917	X_LOCK (reslock);
1918	main_tid = pthread_self ();
1919	main_sig = signum;
1920	X_UNLOCK (reslock);
1921
1922	if (main_sig && npending)
1923	pthread_kill (main_tid, main_sig);
1924	}
1925
1926	void
1927	aio_block (SV *cb)
1928	PROTOTYPE: &
1929	PPCODE:
1930	{
1931	int count;
1932
1933	block_sig ();
1934	PUSHMARK (SP);
1935	PUTBACK;
1936	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1937	SPAGAIN;
1938	unblock_sig ();
1939
1940	if (SvTRUE (ERRSV))
1941	croak (0);
1942
1943	XSRETURN (count);
1944	}
1945
1946	int	2119	int
1947	nreqs()	2120	nreqs ()
1948	PROTOTYPE:
1949	CODE:	2121	CODE:
1950	RETVAL = nreqs;	2122	RETVAL = eio_nreqs ();
1951	OUTPUT:	2123	OUTPUT:
1952	RETVAL	2124	RETVAL
1953		2125
1954	int	2126	int
1955	nready()	2127	nready ()
1956	PROTOTYPE:
1957	CODE:	2128	CODE:
1958	RETVAL = get_nready ();	2129	RETVAL = eio_nready ();
1959	OUTPUT:	2130	OUTPUT:
1960	RETVAL	2131	RETVAL
1961		2132
1962	int	2133	int
1963	npending()	2134	npending ()
1964	PROTOTYPE:
1965	CODE:	2135	CODE:
1966	RETVAL = get_npending ();	2136	RETVAL = eio_npending ();
1967	OUTPUT:	2137	OUTPUT:
1968	RETVAL	2138	RETVAL
1969		2139
1970	int	2140	int
1971	nthreads()	2141	nthreads ()
1972	PROTOTYPE:
1973	CODE:	2142	CODE:
1974	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);	2143	RETVAL = eio_nthreads ();
1975	RETVAL = started;
1976	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
1977	OUTPUT:	2144	OUTPUT:
1978	RETVAL	2145	RETVAL
1979		2146
		2147	int
		2148	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		2149	CODE:
		2150	RETVAL = posix_fadvise (fh, offset, length, advice);
		2151	OUTPUT:
		2152	RETVAL
		2153
		2154	IV
		2155	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		2156	CODE:
		2157	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		2158	OUTPUT:
		2159	RETVAL
		2160
		2161	void
		2162	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2163	PPCODE:
		2164	sv_clear_foreign (scalar);
		2165	{
		2166	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2167	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2168	if (addr == (void *)-1)
		2169	XSRETURN_NO;
		2170
		2171	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2172
		2173	if (!(prot & PROT_WRITE))
		2174	SvREADONLY_on (scalar);
		2175
		2176	XSRETURN_YES;
		2177	}
		2178
		2179	void
		2180	munmap (SV *scalar)
		2181	CODE:
		2182	sv_clear_foreign (scalar);
		2183
		2184	SV *
		2185	mremap (SV *scalar, STRLEN new_length, int flags = MREMAP_MAYMOVE, IV new_address = 0)
		2186	CODE:
		2187	{
		2188	MAGIC *mg = mg_findext (scalar, FOREIGN_MAGIC, &mmap_vtbl);
		2189	void *new;
		2190
		2191	if (!mg || SvPVX (scalar) != mg->mg_ptr)
		2192	croak ("IO::AIO::mremap: scalar not mapped by IO::AIO::mmap or improperly modified");
		2193
		2194	new = mremap (mg->mg_ptr, (size_t)mg->mg_obj, new_length, flags, (void *)new_address);
		2195
		2196	RETVAL = &PL_sv_no;
		2197
		2198	if (new != (void *)-1)
		2199	{
		2200	RETVAL = new == (void *)mg->mg_ptr
		2201	? newSVpvn ("0 but true", 10)
		2202	: &PL_sv_yes;
		2203
		2204	mg->mg_ptr = (char *)new;
		2205	mg->mg_obj = (SV *)new_length;
		2206
		2207	SvPVX (scalar) = mg->mg_ptr;
		2208	SvCUR_set (scalar, new_length);
		2209	}
		2210	}
		2211	OUTPUT:
		2212	RETVAL
		2213
		2214	int
		2215	madvise (SV *scalar, IV offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2216	ALIAS:
		2217	mprotect = 1
		2218	CODE:
		2219	{
		2220	STRLEN svlen;
		2221	void *addr = SvPVbyte (scalar, svlen);
		2222	STRLEN len = SvUV (length);
		2223
		2224	if (offset < 0)
		2225	offset += svlen;
		2226
		2227	if (offset < 0 || offset > svlen)
		2228	croak ("offset outside of scalar");
		2229
		2230	if (!SvOK (length) || len + offset > svlen)
		2231	len = svlen - offset;
		2232
		2233	addr = (void *)(((intptr_t)addr) + offset);
		2234	eio_page_align (&addr, &len);
		2235
		2236	switch (ix)
		2237	{
		2238	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2239	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2240	}
		2241	}
		2242	OUTPUT:
		2243	RETVAL
		2244
		2245	int
		2246	munlock (SV *scalar, IV offset = 0, SV *length = &PL_sv_undef)
		2247	CODE:
		2248	{
		2249	STRLEN svlen;
		2250	void *addr = SvPVbyte (scalar, svlen);
		2251	size_t len = SvUV (length);
		2252
		2253	if (offset < 0)
		2254	offset += svlen;
		2255
		2256	if (offset < 0 || offset > svlen)
		2257	croak ("offset outside of scalar");
		2258
		2259	if (!SvOK (length) || len + offset > svlen)
		2260	len = svlen - offset;
		2261
		2262	addr = (void *)(((intptr_t)addr) + offset);
		2263	eio_page_align (&addr, &len);
		2264	#if _POSIX_MEMLOCK_RANGE
		2265	RETVAL = munlock (addr, len);
		2266	#else
		2267	RETVAL = EIO_ENOSYS ();
		2268	#endif
		2269	}
		2270	OUTPUT:
		2271	RETVAL
		2272
		2273	int
		2274	mlockall (int flags)
		2275	PROTOTYPE: $;
		2276	CODE:
		2277	RETVAL = eio_mlockall_sync (flags);
		2278	OUTPUT:
		2279	RETVAL
		2280
		2281	int
		2282	munlockall ()
		2283	CODE:
		2284	#if _POSIX_MEMLOCK
		2285	munlockall ();
		2286	#else
		2287	RETVAL = EIO_ENOSYS ();
		2288	#endif
		2289	OUTPUT:
		2290	RETVAL
		2291
		2292	int
		2293	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2294	CODE:
		2295	{
		2296	#if HAVE_LINUX_SPLICE
		2297	loff_t off_in_, off_out_;
		2298	RETVAL = splice (
		2299	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2300	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2301	length, flags
		2302	);
		2303	#else
		2304	RETVAL = EIO_ENOSYS ();
		2305	#endif
		2306	}
		2307	OUTPUT:
		2308	RETVAL
		2309
		2310	int
		2311	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2312	CODE:
		2313	#if HAVE_LINUX_SPLICE
		2314	RETVAL = tee (rfh, wfh, length, flags);
		2315	#else
		2316	RETVAL = EIO_ENOSYS ();
		2317	#endif
		2318	OUTPUT:
		2319	RETVAL
		2320
		2321	int
		2322	pipesize (aio_rfd rfh, int new_size = -1)
		2323	PROTOTYPE: $;$
		2324	CODE:
		2325	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2326	if (new_size >= 0)
		2327	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2328	else
		2329	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2330	#else
		2331	errno = ENOSYS;
		2332	RETVAL = -1;
		2333	#endif
		2334	OUTPUT:
		2335	RETVAL
		2336
		2337	void
		2338	pipe2 (int flags = 0)
		2339	PROTOTYPE: ;$
		2340	PPCODE:
		2341	{
		2342	int fd[2];
		2343	int res;
		2344
		2345	if (flags)
		2346	#if HAVE_PIPE2
		2347	res = pipe2 (fd, flags);
		2348	#else
		2349	res = (errno = ENOSYS, -1);
		2350	#endif
		2351	else
		2352	res = pipe (fd);
		2353
		2354	if (!res)
		2355	{
		2356	EXTEND (SP, 2);
		2357	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2358	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2359	}
		2360	}
		2361
		2362	void
		2363	eventfd (unsigned int initval = 0, int flags = 0)
		2364	PPCODE:
		2365	{
		2366	int fd;
		2367	#if HAVE_EVENTFD
		2368	fd = eventfd (initval, flags);
		2369	#else
		2370	fd = (errno = ENOSYS, -1);
		2371	#endif
		2372
		2373	XPUSHs (newmortalFH (fd, O_RDWR));
		2374	}
		2375
		2376	void
		2377	timerfd_create (int clockid, int flags = 0)
		2378	PPCODE:
		2379	{
		2380	int fd;
		2381	#if HAVE_TIMERFD
		2382	fd = timerfd_create (clockid, flags);
		2383	#else
		2384	fd = (errno = ENOSYS, -1);
		2385	#endif
		2386
		2387	XPUSHs (newmortalFH (fd, O_RDWR));
		2388	}
		2389
		2390	void
		2391	timerfd_settime (SV *fh, int flags, NV interval, NV value)
		2392	PPCODE:
		2393	{
		2394	int fd = s_fileno_croak (fh, 0);
		2395	#if HAVE_TIMERFD
		2396	int res;
		2397	struct itimerspec its, ots;
		2398
		2399	ts_set (&its.it_interval, interval);
		2400	ts_set (&its.it_value , value);
		2401	res = timerfd_settime (fd, flags, &its, &ots);
		2402
		2403	if (!res)
		2404	{
		2405	EXTEND (SP, 2);
		2406	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2407	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2408	}
		2409	#else
		2410	errno = ENOSYS;
		2411	#endif
		2412	}
		2413
		2414	void
		2415	timerfd_gettime (SV *fh)
		2416	PPCODE:
		2417	{
		2418	int fd = s_fileno_croak (fh, 0);
		2419	#if HAVE_TIMERFD
		2420	int res;
		2421	struct itimerspec ots;
		2422	res = timerfd_gettime (fd, &ots);
		2423
		2424	if (!res)
		2425	{
		2426	EXTEND (SP, 2);
		2427	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2428	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2429	}
		2430	#else
		2431	errno = ENOSYS;
		2432	#endif
		2433	}
		2434
		2435	UV
		2436	get_fdlimit ()
		2437	CODE:
		2438	#if HAVE_RLIMITS
		2439	struct rlimit rl;
		2440	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2441	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2442	#endif
		2443	XSRETURN_UNDEF;
		2444	OUTPUT:
		2445	RETVAL
		2446
		2447	void
		2448	min_fdlimit (UV limit = 0x7fffffffU)
		2449	CODE:
		2450	{
		2451	#if HAVE_RLIMITS
		2452	struct rlimit rl;
		2453	rlim_t orig_rlim_max;
		2454	UV bit;
		2455
		2456	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2457	goto fail;
		2458
		2459	if (rl.rlim_cur == RLIM_INFINITY)
		2460	XSRETURN_YES;
		2461
		2462	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2463
		2464	if (rl.rlim_cur < limit)
		2465	{
		2466	rl.rlim_cur = limit;
		2467
		2468	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2469	rl.rlim_max = rl.rlim_cur;
		2470	}
		2471
		2472	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2473	XSRETURN_YES;
		2474
		2475	if (errno == EPERM)
		2476	{
		2477	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2478	/* our limit overflows a system-wide limit */
		2479	/* try an adaptive algorithm, but do not lower the hardlimit */
		2480	rl.rlim_max = 0;
		2481	for (bit = 0x40000000U; bit; bit >>= 1)
		2482	{
		2483	rl.rlim_max |= bit;
		2484	rl.rlim_cur = rl.rlim_max;
		2485
		2486	/* nevr decrease the hard limit */
		2487	if (rl.rlim_max < orig_rlim_max)
		2488	break;
		2489
		2490	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2491	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2492	}
		2493
		2494	/* now, raise the soft limit to the max permitted */
		2495	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2496	{
		2497	rl.rlim_cur = rl.rlim_max;
		2498	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2499	errno = EPERM;
		2500	}
		2501	}
		2502	#endif
		2503	fail:
		2504	XSRETURN_UNDEF;
		2505	}
		2506
		2507	void _on_next_submit (SV *cb)
		2508	CODE:
		2509	SvREFCNT_dec (on_next_submit);
		2510	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2511
1980	PROTOTYPES: DISABLE	2512	PROTOTYPES: DISABLE
		2513
		2514	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2515
		2516	BOOT:
		2517	{
		2518	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2519	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2520	}
		2521
		2522	void
		2523	DESTROY (SV *self)
		2524	CODE:
		2525	{
		2526	aio_wd wd = SvAIO_WD (self);
		2527	#if HAVE_AT
		2528	{
		2529	SV *callback = &PL_sv_undef;
		2530	dREQ; /* clobbers next_pri :/ */
		2531	next_pri = req->pri; /* restore next_pri */
		2532	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2533	req->type = EIO_WD_CLOSE;
		2534	req->wd = wd;
		2535	REQ_SEND;
		2536	}
		2537	#else
		2538	eio_wd_close_sync (wd);
		2539	#endif
		2540	}
1981		2541
1982	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	2542	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1983		2543
1984	void	2544	void
1985	cancel (aio_req_ornot req)	2545	cancel (aio_req_ornot req)
1986	CODE:	2546	CODE:
1987	req_cancel (req);	2547	eio_cancel (req);
1988		2548
1989	void	2549	void
1990	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	2550	cb (aio_req_ornot req, SV *callback = NO_INIT)
1991	CODE:	2551	PPCODE:
		2552	{
		2553	if (GIMME_V != G_VOID)
		2554	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2555
		2556	if (items > 1)
		2557	{
		2558	SV *cb_cv = get_cb (callback);
		2559
1992	SvREFCNT_dec (req->callback);	2560	SvREFCNT_dec (req->callback);
1993	req->callback = newSVsv (callback);	2561	req->callback = SvREFCNT_inc (cb_cv);
		2562	}
		2563	}
1994		2564
1995	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	2565	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1996		2566
1997	void	2567	void
1998	add (aio_req grp, ...)	2568	add (aio_req grp, ...)
1999	PPCODE:	2569	PPCODE:
2000	{	2570	{
2001	int i;	2571	int i;
2002	aio_req req;
2003
2004	if (main_sig && !block_sig_level)
2005	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
2006		2572
2007	if (grp->int1 == 2)	2573	if (grp->int1 == 2)
2008	croak ("cannot add requests to IO::AIO::GRP after the group finished");	2574	croak ("cannot add requests to IO::AIO::GRP after the group finished");
2009		2575
2010	for (i = 1; i < items; ++i )	2576	for (i = 1; i < items; ++i )
2011	{	2577	{
		2578	aio_req req;
		2579
2012	if (GIMME_V != G_VOID)	2580	if (GIMME_V != G_VOID)
2013	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2581	XPUSHs (sv_2mortal (newSVsv (ST (i))));
2014		2582
2015	req = SvAIO_REQ (ST (i));	2583	req = SvAIO_REQ (ST (i));
2016		2584
2017	if (req)	2585	if (req)
2018	{	2586	eio_grp_add (grp, req);
2019	++grp->size;
2020	req->grp = grp;
2021
2022	req->grp_prev = 0;
2023	req->grp_next = grp->grp_first;
2024
2025	if (grp->grp_first)
2026	grp->grp_first->grp_prev = req;
2027
2028	grp->grp_first = req;
2029	}
2030	}	2587	}
2031	}	2588	}
2032		2589
2033	void	2590	void
2034	cancel_subs (aio_req_ornot req)	2591	cancel_subs (aio_req_ornot req)
…		…
2043	AV *av;	2600	AV *av;
2044		2601
2045	grp->errorno = errno;	2602	grp->errorno = errno;
2046		2603
2047	av = newAV ();	2604	av = newAV ();
		2605	av_extend (av, items - 1);
2048		2606
2049	for (i = 1; i < items; ++i )	2607	for (i = 1; i < items; ++i )
2050	av_push (av, newSVsv (ST (i)));	2608	av_push (av, newSVsv (ST (i)));
2051		2609
2052	SvREFCNT_dec (grp->sv1);	2610	SvREFCNT_dec (grp->sv1);
…		…
2059	grp->errorno = errorno;	2617	grp->errorno = errorno;
2060		2618
2061	void	2619	void
2062	limit (aio_req grp, int limit)	2620	limit (aio_req grp, int limit)
2063	CODE:	2621	CODE:
2064	grp->int2 = limit;	2622	eio_grp_limit (grp, limit);
2065	aio_grp_feed (grp);
2066		2623
2067	void	2624	void
2068	feed (aio_req grp, SV *callback=&PL_sv_undef)	2625	feed (aio_req grp, SV *callback = &PL_sv_undef)
2069	CODE:	2626	CODE:
2070	{	2627	{
2071	SvREFCNT_dec (grp->sv2);	2628	SvREFCNT_dec (grp->sv2);
2072	grp->sv2 = newSVsv (callback);	2629	grp->sv2 = newSVsv (callback);
		2630	grp->feed = aio_grp_feed;
2073		2631
2074	if (grp->int2 <= 0)	2632	if (grp->int2 <= 0)
2075	grp->int2 = 2;	2633	grp->int2 = 2;
2076		2634
2077	aio_grp_feed (grp);	2635	eio_grp_limit (grp, grp->int2);
2078	}	2636	}
2079		2637

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