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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC vs.
Revision 1.264 by root, Tue Aug 14 11:44:52 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		8
9	#include "autoconf/config.h"	9	#if !defined mg_findext
		10	# define mg_findext(sv,type,vtbl) mg_find (sv, type)
		11	#endif
10		12
11	#include <stddef.h>	13	#include <stddef.h>
12	#include <stdlib.h>	14	#include <stdlib.h>
13	#include <errno.h>	15	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	16	#include <sys/types.h>
		17	#include <sys/socket.h>
17	#include <sys/stat.h>	18	#include <sys/stat.h>
18	#include <limits.h>	19	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	20	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	21	#include <sched.h>
23		22
24	#if HAVE_SENDFILE	23	#if HAVE_SYS_SYSMACROS_H
25	# if __linux
26	# include <sys/sendfile.h>
27	# elif __freebsd
28	# include <sys/socket.h>	24	# include <sys/sysmacros.h>
		25	#endif
		26
		27	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
29	# include <sys/uio.h>	28	# include <sys/mman.h>
30	# elif __hpux	29	#endif
		30
		31	/* the incompetent fool that created musl keeps __linux__, refuses
		32	* to implement any linux standard apis, and also has no way to test
		33	* for his broken iplementation. don't complain to me if this fails
		34	* for you.
		35	*/
		36	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		37	# include <linux/fs.h>
		38	# ifdef FS_IOC_FIEMAP
		39	# include <linux/types.h>
		40	# include <linux/fiemap.h>
		41	# define HAVE_FIEMAP 1
		42	# endif
		43	#endif
		44
		45	/* perl namespace pollution */
		46	#undef VERSION
		47
		48	/* perl stupidly overrides readdir and maybe others */
		49	/* with thread-unsafe versions, imagine that :( */
		50	#undef readdir
		51	#undef opendir
		52	#undef closedir
		53
		54	#ifdef _WIN32
		55
		56	// perl overrides all those nice libc functions
		57
		58	#undef malloc
		59	#undef free
		60	#undef open
		61	#undef read
		62	#undef write
		63	#undef send
		64	#undef recv
		65	#undef stat
		66	#undef lstat
		67	#undef fstat
		68	#undef truncate
		69	#undef ftruncate
		70	#undef open
		71	#undef link
		72	#undef close
		73	#undef unlink
		74	#undef mkdir
		75	#undef rmdir
		76	#undef rename
		77	#undef lseek
		78	#undef opendir
		79	#undef readdir
		80	#undef closedir
		81	#undef chmod
		82	#undef fchmod
		83	#undef dup
		84	#undef dup2
		85	#undef abort
		86	#undef pipe
		87
		88	#define EIO_STRUCT_STAT struct _stati64
		89	#define EIO_STRUCT_STATI64
		90
		91	#else
		92
31	# include <sys/socket.h>	93	#include <sys/time.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	94	#include <sys/select.h>
		95	#include <unistd.h>
		96	#include <utime.h>
		97	#include <signal.h>
		98
		99	#define EIO_STRUCT_STAT Stat_t
		100
		101	#endif
		102
		103	/*****************************************************************************/
		104
		105	#if __GNUC__ >= 3
		106	# define expect(expr,value) __builtin_expect ((expr),(value))
		107	#else
		108	# define expect(expr,value) (expr)
		109	#endif
		110
		111	#define expect_false(expr) expect ((expr) != 0, 0)
		112	#define expect_true(expr) expect ((expr) != 0, 1)
		113
		114	/*****************************************************************************/
		115
		116	#include "config.h"
		117
		118	#if HAVE_ST_XTIMENSEC
		119	# define ATIMENSEC PL_statcache.st_atimensec
		120	# define MTIMENSEC PL_statcache.st_mtimensec
		121	# define CTIMENSEC PL_statcache.st_ctimensec
		122	#elif HAVE_ST_XTIMESPEC
		123	# define ATIMENSEC PL_statcache.st_atim.tv_nsec
		124	# define MTIMENSEC PL_statcache.st_mtim.tv_nsec
		125	# define CTIMENSEC PL_statcache.st_ctim.tv_nsec
		126	#else
		127	# define ATIMENSEC 0
		128	# define MTIMENSEC 0
		129	# define CTIMENSEC 0
		130	#endif
		131
		132	#include "schmorp.h"
		133
		134	#if HAVE_EVENTFD
		135	# include <sys/eventfd.h>
		136	#endif
		137
		138	#if HAVE_TIMERFD
		139	# include <sys/timerfd.h>
		140	#endif
		141
		142	#if HAVE_RLIMITS
		143	#include <sys/time.h>
		144	#include <sys/resource.h>
		145	#endif
		146
		147	typedef SV SV8; /* byte-sv, used for argument-checking */
		148	typedef int aio_rfd; /* read file desriptor */
		149	typedef int aio_wfd; /* write file descriptor */
		150
		151	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		152
		153	#define EIO_REQ_MEMBERS \
		154	SV *callback; \
		155	SV *sv1, *sv2; \
		156	SV *sv3, *sv4; \
		157	STRLEN stroffset; \
		158	SV *self;
		159
		160	#define EIO_NO_WRAPPERS 1
		161
		162	#include "libeio/eio.h"
		163
		164	static int req_invoke (eio_req *req);
		165	#define EIO_FINISH(req) req_invoke (req)
		166	static void req_destroy (eio_req *grp);
		167	#define EIO_DESTROY(req) req_destroy (req)
		168
		169	#include "libeio/eio.c"
		170
		171	#if !HAVE_POSIX_FADVISE
		172	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		173	#endif
		174
		175	#if !HAVE_POSIX_MADVISE
		176	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		177	#endif
		178
		179	#ifndef MAP_ANONYMOUS
		180	# ifdef MAP_ANON
		181	# define MAP_ANONYMOUS MAP_ANON
34	# else	182	# else
35	# error sendfile support requested but not available	183	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	184	# endif
37	#endif	185	#endif
38		186
39	/* number of seconds after which idle threads exit */	187	#ifndef makedev
40	#define IDLE_TIMEOUT 10	188	# define makedev(maj,min) (((maj) << 8) | (min))
41
42	/* used for struct dirent, AIX doesn't provide it */
43	#ifndef NAME_MAX
44	# define NAME_MAX 4096
45	#endif	189	#endif
		190	#ifndef major
		191	# define major(dev) ((dev) >> 8)
		192	#endif
		193	#ifndef minor
		194	# define minor(dev) ((dev) & 0xff)
		195	#endif
46		196
47	/* buffer size for various temporary buffers */	197	#if PAGESIZE <= 0
48	#define AIO_BUFSIZE 65536	198	# define PAGESIZE sysconf (_SC_PAGESIZE)
		199	#endif
49		200
50	#define dBUF \	201	/*****************************************************************************/
51	char *aio_buf; \	202
52	LOCK (wrklock); \	203	#if !_POSIX_MAPPED_FILES
53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	204	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, (void *)-1)
54	UNLOCK (wrklock); \	205	# define munmap(addr,length) EIO_ENOSYS ()
55	if (!aio_buf) \	206	#endif
		207
		208	#if !_POSIX_MEMORY_PROTECTION
		209	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		210	#endif
		211
		212	#if !MREMAP_MAYMOVE
		213	# define mremap(old_address,old_size,new_size,flags,new_address) (errno = ENOSYS, (void *)-1)
		214	#endif
		215
		216	#define FOREIGN_MAGIC PERL_MAGIC_ext
		217
		218	static int ecb_cold
		219	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		220	{
		221	int old_errno = errno;
		222	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		223	errno = old_errno;
		224
		225	mg->mg_obj = 0; /* just in case */
		226
		227	SvREADONLY_off (sv);
		228
		229	if (SvPVX (sv) != mg->mg_ptr)
		230	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		231
		232	SvCUR_set (sv, 0);
		233	SvPVX (sv) = 0;
		234	SvOK_off (sv);
		235
56	return -1;	236	return 0;
		237	}
57		238
58	typedef SV SV8; /* byte-sv, used for argument-checking */	239	static MGVTBL mmap_vtbl = {
59		240	0, 0, 0, 0, mmap_free
60	enum {
61	REQ_QUIT,
62	REQ_OPEN, REQ_CLOSE,
63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
64	REQ_SENDFILE,
65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
66	REQ_FSYNC, REQ_FDATASYNC,
67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
68	REQ_MKNOD, REQ_READDIR,
69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
70	REQ_GROUP, REQ_NOP,
71	REQ_BUSY,
72	};	241	};
73		242
74	#define AIO_REQ_KLASS "IO::AIO::REQ"	243	static int ecb_cold
75	#define AIO_GRP_KLASS "IO::AIO::GRP"	244	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
76
77	typedef struct aio_cb
78	{	245	{
79	struct aio_cb *volatile next;	246	free (mg->mg_ptr);
		247	mg->mg_obj = 0; /* just in case */
80		248
81	SV *callback, *fh;	249	SvREADONLY_off (sv);
82	SV *sv1, *sv2;
83	void *ptr1, *ptr2;
84	off_t offs;
85	size_t size;
86	ssize_t result;
87		250
88	STRLEN stroffset;	251	if (SvPVX (sv) != mg->mg_ptr)
89	int type;	252	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
90	int int1, int2;
91	int errorno;
92	mode_t mode; /* open */
93		253
94	unsigned char flags;	254	SvCUR_set (sv, 0);
95	unsigned char pri;	255	SvPVX (sv) = 0;
		256	SvOK_off (sv);
96		257
97	SV *self; /* the perl counterpart of this request, if any */	258	return 0;
98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	259	}
99	} aio_cb;
100		260
101	enum {	261	static MGVTBL sysfree_vtbl = {
102	FLAG_CANCELLED = 0x01, /* request was cancelled */	262	0, 0, 0, 0, sysfree_free
103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
105	};	263	};
106		264
107	typedef aio_cb *aio_req;	265	/*****************************************************************************/
108	typedef aio_cb *aio_req_ornot;
109		266
110	enum {	267	/* helper: set scalar to foreign ptr with custom free */
111	PRI_MIN = -4,	268	static void
112	PRI_MAX = 4,	269	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
113
114	DEFAULT_PRI = 0,
115	PRI_BIAS = -PRI_MIN,
116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
117	};
118
119	#define AIO_TICKS ((1000000 + 1023) >> 10)
120
121	static unsigned int max_poll_time = 0;
122	static unsigned int max_poll_reqs = 0;
123
124	/* calculcate time difference in ~1/AIO_TICKS of a second */
125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
126	{	270	{
127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS	271	sv_force_normal (sv);
128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
129	}
130		272
131	static thread_t main_tid;	273	/* we store the length in mg_obj, as namlen is I32 :/ */
132	static int main_sig;	274	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
133	static int block_sig_level;	275	->mg_obj = (SV *)length;
134		276
135	void block_sig ()	277	SvUPGRADE (sv, SVt_PV); /* nop... */
136	{
137	sigset_t ss;
138		278
139	if (block_sig_level++)	279	if (SvLEN (sv))
		280	Safefree (SvPVX (sv));
		281
		282	SvPVX (sv) = (char *)addr;
		283	SvCUR_set (sv, length);
		284	SvLEN_set (sv, 0);
		285	SvPOK_only (sv);
		286	}
		287
		288	static void
		289	sv_clear_foreign (SV *sv)
		290	{
		291	/* todo: iterate over magic and only free ours, but of course */
		292	/* the perl5porters will call that (correct) behaviour buggy */
		293	sv_unmagic (sv, FOREIGN_MAGIC);
		294	}
		295
		296	/*****************************************************************************/
		297
		298	/* defines all sorts of constants to 0 unless they are already defined */
		299	/* also provides const_iv_ and const_niv_ macros for them */
		300	#include "def0.h"
		301
		302	/*****************************************************************************/
		303
		304	static void
		305	fiemap (eio_req *req)
		306	{
		307	req->result = -1;
		308
		309	#if HAVE_FIEMAP
		310	/* assume some c99 */
		311	struct fiemap *fiemap = 0;
		312	size_t end_offset;
		313	int count = req->int3;
		314
		315	req->flags |= EIO_FLAG_PTR1_FREE;
		316
		317	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		318	/* increase in 3.5kb steps */
		319	if (count < 0)
		320	count = 8;
		321
		322	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		323	errno = ENOMEM;
		324	if (!fiemap)
140	return;	325	return;
141		326
142	if (!main_sig)	327	req->ptr1 = fiemap;
		328
		329	fiemap->fm_start = req->offs;
		330	fiemap->fm_length = req->size;
		331	fiemap->fm_flags = req->int2;
		332	fiemap->fm_extent_count = count;
		333
		334	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
143	return;	335	return;
144		336
145	sigemptyset (&ss);	337	if (req->int3 >= 0 /* not autosizing */
146	sigaddset (&ss, main_sig);	338	|| !fiemap->fm_mapped_extents /* no more extents */
147	pthread_sigmask (SIG_BLOCK, &ss, 0);	339	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
148	}	340	goto done;
149		341
150	void unblock_sig ()	342	/* else we have to loop -
151	{	343	* it would be tempting (actually I tried that first) to just query the
152	sigset_t ss;	344	* number of extents needed, but linux often feels like not returning all
		345	* extents, without telling us it left any out. this complicates
		346	* this quite a bit.
		347	*/
153		348
154	if (--block_sig_level)	349	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
155	return;
156		350
157	if (!main_sig)	351	for (;;)
158	return;
159
160	sigemptyset (&ss);
161	sigaddset (&ss, main_sig);
162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	/* worker threads management */
170	static mutex_t wrklock = MUTEX_INIT;
171
172	typedef struct worker {
173	/* locked by wrklock */
174	struct worker *prev, *next;
175
176	thread_t tid;
177
178	/* locked by reslock, reqlock or wrklock */
179	aio_req req; /* currently processed request */
180	void *dbuf;
181	DIR *dirp;
182	} worker;
183
184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
185
186	static void worker_clear (worker *wrk)
187	{
188	if (wrk->dirp)
189	{	352	{
190	closedir (wrk->dirp);	353	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
191	wrk->dirp = 0;	354	char scratch[3072];
192	}	355	struct fiemap *incmap = (struct fiemap *)scratch;
193		356
194	if (wrk->dbuf)	357	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
195	{	358	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
196	free (wrk->dbuf);	359	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
197	wrk->dbuf = 0;	360	incmap->fm_flags = fiemap->fm_flags;
198	}	361	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
199	}
200		362
201	static void worker_free (worker *wrk)	363	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
202	{
203	wrk->next->prev = wrk->prev;
204	wrk->prev->next = wrk->next;
205
206	free (wrk);
207	}
208
209	static volatile unsigned int nreqs, nready, npending;
210	static volatile unsigned int max_idle = 4;
211	static volatile unsigned int max_outstanding = 0xffffffff;
212	static int respipe [2];
213
214	static mutex_t reslock = MUTEX_INIT;
215	static mutex_t reqlock = MUTEX_INIT;
216	static cond_t reqwait = COND_INIT;
217
218	#if WORDACCESS_UNSAFE
219
220	static unsigned int get_nready ()
221	{
222	unsigned int retval;
223
224	LOCK (reqlock);
225	retval = nready;
226	UNLOCK (reqlock);
227
228	return retval;
229	}
230
231	static unsigned int get_npending ()
232	{
233	unsigned int retval;
234
235	LOCK (reslock);
236	retval = npending;
237	UNLOCK (reslock);
238
239	return retval;
240	}
241
242	static unsigned int get_nthreads ()
243	{
244	unsigned int retval;
245
246	LOCK (wrklock);
247	retval = started;
248	UNLOCK (wrklock);
249
250	return retval;
251	}
252
253	#else
254
255	# define get_nready() nready
256	# define get_npending() npending
257	# define get_nthreads() started
258
259	#endif
260
261	/*
262	* a somewhat faster data structure might be nice, but
263	* with 8 priorities this actually needs <20 insns
264	* per shift, the most expensive operation.
265	*/
266	typedef struct {
267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
268	int size;
269	} reqq;
270
271	static reqq req_queue;
272	static reqq res_queue;
273
274	int reqq_push (reqq *q, aio_req req)
275	{
276	int pri = req->pri;
277	req->next = 0;
278
279	if (q->qe[pri])
280	{
281	q->qe[pri]->next = req;
282	q->qe[pri] = req;
283	}
284	else
285	q->qe[pri] = q->qs[pri] = req;
286
287	return q->size++;
288	}
289
290	aio_req reqq_shift (reqq *q)
291	{
292	int pri;
293
294	if (!q->size)
295	return 0;	364	return;
296		365
297	--q->size;	366	if (!incmap->fm_mapped_extents)
		367	goto done;
298		368
299	for (pri = NUM_PRI; pri--; )	369	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
300	{	370	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
301	aio_req req = q->qs[pri];	371	errno = ENOMEM;
302
303	if (req)	372	if (!fiemap)
		373	return;
		374
		375	req->ptr1 = fiemap;
		376
		377	for (count = 0; count < incmap->fm_mapped_extents; ++count)
304	{	378	{
305	if (!(q->qs[pri] = req->next))	379	struct fiemap_extent *e = incmap->fm_extents + count;
306	q->qe[pri] = 0;
307		380
308	return req;	381	if (e->fe_logical + e->fe_length >= end_offset)
		382	goto done;
		383
		384	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		385
		386	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		387	goto done;
		388
309	}	389	}
310	}	390	}
311		391
312	abort ();	392	done:
313	}	393	req->result = 0;
314		394
315	static int poll_cb ();	395	#else
316	static int req_invoke (aio_req req);	396	errno = ENOSYS;
		397	#endif
		398	}
		399
		400	/*****************************************************************************/
		401
		402	enum {
		403	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		404	};
		405
		406	typedef eio_req *aio_req;
		407	typedef eio_req *aio_req_ornot;
		408	typedef eio_wd aio_wd;
		409
		410	static SV *on_next_submit;
		411	static int next_pri = EIO_PRI_DEFAULT;
		412	static int max_outstanding;
		413
		414	static s_epipe respipe;
		415
317	static void req_free (aio_req req);	416	static void req_destroy (aio_req req);
318	static void req_cancel (aio_req req);	417	static void req_cancel (aio_req req);
319		418
		419	static void
		420	want_poll (void)
		421	{
		422	/* write a dummy byte to the pipe so fh becomes ready */
		423	s_epipe_signal (&respipe);
		424	}
		425
		426	static void
		427	done_poll (void)
		428	{
		429	/* read any signals sent by the worker threads */
		430	s_epipe_drain (&respipe);
		431	}
		432
320	/* must be called at most once */	433	/* must be called at most once */
321	static SV *req_sv (aio_req req, const char *klass)	434	static SV *
		435	req_sv (aio_req req, HV *stash)
322	{	436	{
323	if (!req->self)	437	if (!req->self)
324	{	438	{
325	req->self = (SV *)newHV ();	439	req->self = (SV *)newHV ();
326	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	440	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
327	}	441	}
328		442
329	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	443	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
330	}	444	}
331		445
332	static aio_req SvAIO_REQ (SV *sv)	446	static SV *
		447	newSVaio_wd (aio_wd wd)
		448	{
		449	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		450	}
		451
		452	static aio_req
		453	SvAIO_REQ (SV *sv)
333	{	454	{
334	MAGIC *mg;	455	MAGIC *mg;
335		456
336	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	457	if (!SvROK (sv)
		458	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		459	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		460	&& SvSTASH (SvRV (sv)) != aio_req_stash
		461	&& !sv_derived_from (sv, "IO::AIO::REQ")))
337	croak ("object of class " AIO_REQ_KLASS " expected");	462	croak ("object of class IO::AIO::REQ expected");
338		463
339	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	464	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
340		465
341	return mg ? (aio_req)mg->mg_ptr : 0;	466	return mg ? (aio_req)mg->mg_ptr : 0;
342	}	467	}
343		468
		469	static aio_wd
		470	SvAIO_WD (SV *sv)
		471	{
		472	if (!SvROK (sv)
		473	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		474	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		475	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		476
		477	return (aio_wd)(long)SvIVX (SvRV (sv));
		478	}
		479
		480	static SV *
		481	newmortalFH (int fd, int flags)
		482	{
		483	if (fd < 0)
		484	return &PL_sv_undef;
		485
		486	GV *gv = (GV *)sv_newmortal ();
		487	char sym[64];
		488	int symlen;
		489
		490	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		491	gv_init (gv, aio_stash, sym, symlen, 0);
		492
		493	symlen = snprintf (
		494	sym,
		495	sizeof (sym),
		496	"%s&=%d",
		497	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		498	fd
		499	);
		500
		501	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		502	? (SV *)gv : &PL_sv_undef;
		503	}
		504
		505	static void
344	static void aio_grp_feed (aio_req grp)	506	aio_grp_feed (aio_req grp)
345	{	507	{
346	block_sig ();	508	if (grp->sv2 && SvOK (grp->sv2))
347
348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
349	{	509	{
350	int old_len = grp->size;
351
352	if (grp->sv2 && SvOK (grp->sv2))
353	{
354	dSP;	510	dSP;
355		511
356	ENTER;	512	ENTER;
357	SAVETMPS;	513	SAVETMPS;
358	PUSHMARK (SP);	514	PUSHMARK (SP);
359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	515	XPUSHs (req_sv (grp, aio_grp_stash));
360	PUTBACK;	516	PUTBACK;
361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	517	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
362	SPAGAIN;	518	SPAGAIN;
363	FREETMPS;	519	FREETMPS;
364	LEAVE;	520	LEAVE;
365	}
366
367	/* stop if no progress has been made */
368	if (old_len == grp->size)
369	{
370	SvREFCNT_dec (grp->sv2);
371	grp->sv2 = 0;
372	break;
373	}
374	}	521	}
375
376	unblock_sig ();
377	}	522	}
378		523
379	static void aio_grp_dec (aio_req grp)	524	static void
		525	req_submit (eio_req *req)
380	{	526	{
381	--grp->size;	527	eio_submit (req);
382		528
383	/* call feeder, if applicable */	529	if (expect_false (on_next_submit))
384	aio_grp_feed (grp);
385
386	/* finish, if done */
387	if (!grp->size && grp->int1)
388	{	530	{
389	block_sig ();	531	dSP;
		532	SV *cb = sv_2mortal (on_next_submit);
390		533
391	if (!req_invoke (grp))	534	on_next_submit = 0;
392	{
393	req_free (grp);
394	unblock_sig ();
395	croak (0);
396	}
397		535
398	req_free (grp);	536	PUSHMARK (SP);
399	unblock_sig ();	537	PUTBACK;
		538	call_sv (cb, G_DISCARD | G_EVAL);
400	}	539	}
401	}	540	}
402		541
		542	static int
403	static int req_invoke (aio_req req)	543	req_invoke (eio_req *req)
404	{	544	{
405	dSP;
406
407	if (req->flags & FLAG_SV1_RO_OFF)	545	if (req->flags & FLAG_SV2_RO_OFF)
408	SvREADONLY_off (req->sv1);	546	SvREADONLY_off (req->sv2);
409		547
410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	548	if (!EIO_CANCELLED (req) && req->callback)
411	{	549	{
		550	dSP;
		551	static SV *sv_result_cache; /* caches the result integer SV */
		552	SV *sv_result;
		553
412	ENTER;	554	ENTER;
413	SAVETMPS;	555	SAVETMPS;
414	PUSHMARK (SP);	556	PUSHMARK (SP);
415	EXTEND (SP, 1);	557	EXTEND (SP, 1);
416		558
		559	/* do not recreate the result IV from scratch each time */
		560	if (expect_true (sv_result_cache))
		561	{
		562	sv_result = sv_result_cache; sv_result_cache = 0;
		563	SvIV_set (sv_result, req->result);
		564	SvIOK_only (sv_result);
		565	}
		566	else
		567	{
		568	sv_result = newSViv (req->result);
		569	SvREADONLY_on (sv_result);
		570	}
		571
417	switch (req->type)	572	switch (req->type)
418	{	573	{
		574	case EIO_WD_OPEN:
		575	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		576	break;
		577
419	case REQ_READDIR:	578	case EIO_READDIR:
420	{	579	{
421	SV *rv = &PL_sv_undef;	580	SV *rv = &PL_sv_undef;
422		581
423	if (req->result >= 0)	582	if (req->result >= 0)
424	{	583	{
425	int i;	584	int i;
426	char *buf = req->ptr2;	585	char *names = (char *)req->ptr2;
		586	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
427	AV *av = newAV ();	587	AV *av = newAV ();
428		588
429	av_extend (av, req->result - 1);	589	av_extend (av, req->result - 1);
430		590
431	for (i = 0; i < req->result; ++i)	591	for (i = 0; i < req->result; ++i)
432	{	592	{
433	SV *sv = newSVpv (buf, 0);	593	if (req->int1 & EIO_READDIR_DENTS)
		594	{
		595	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
434		596
		597	if (req->int1 & EIO_READDIR_CUSTOM2)
		598	{
		599	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		600	AV *avent = newAV ();
		601
		602	av_extend (avent, 2);
		603
		604	if (!sv_type [ent->type])
		605	{
		606	sv_type [ent->type] = newSViv (ent->type);
		607	SvREADONLY_on (sv_type [ent->type]);
		608	}
		609
		610	av_store (avent, 0, namesv);
		611	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		612	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		613
		614	av_store (av, i, newRV_noinc ((SV *)avent));
		615	}
		616	else
435	av_store (av, i, sv);	617	av_store (av, i, namesv);
		618
		619	++ent;
		620	}
		621	else
		622	{
		623	SV *name = newSVpv (names, 0);
		624	av_store (av, i, name);
436	buf += SvCUR (sv) + 1;	625	names += SvCUR (name) + 1;
		626	}
437	}	627	}
438		628
439	rv = sv_2mortal (newRV_noinc ((SV *)av));	629	rv = sv_2mortal (newRV_noinc ((SV *)av));
440	}	630	}
441		631
442	PUSHs (rv);	632	PUSHs (rv);
		633
		634	if (req->int1 & EIO_READDIR_CUSTOM1)
		635	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
443	}	636	}
444	break;	637	break;
445		638
446	case REQ_OPEN:	639	case EIO_OPEN:
		640	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		641	break;
		642
		643	case EIO_STATVFS:
		644	case EIO_FSTATVFS:
447	{	645	{
448	/* convert fd to fh */	646	SV *rv = &PL_sv_undef;
449	SV *fh;	647
		648	#ifndef _WIN32
		649	if (req->result >= 0)
		650	{
		651	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		652	HV *hv = newHV ();
		653	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		654	* chooses to make it a struct.
		655	*/
		656	unsigned long fsid = 0;
		657	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
450		658
451	PUSHs (sv_2mortal (newSViv (req->result)));	659	rv = sv_2mortal (newRV_noinc ((SV *)hv));
452	PUTBACK;
453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
454	SPAGAIN;
455		660
456	fh = POPs;	661	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
457	PUSHMARK (SP);	662	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		663	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		664	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		665	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		666	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		667	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		668	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		669	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		670	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		671	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		672	}
		673	#endif
		674
458	XPUSHs (fh);	675	PUSHs (rv);
459	}	676	}
		677
460	break;	678	break;
461		679
462	case REQ_GROUP:	680	case EIO_GROUP:
463	req->int1 = 2; /* mark group as finished */	681	req->int1 = 2; /* mark group as finished */
464		682
465	if (req->sv1)	683	if (req->sv1)
466	{	684	{
467	int i;	685	int i;
…		…
471	for (i = 0; i <= AvFILL (av); ++i)	689	for (i = 0; i <= AvFILL (av); ++i)
472	PUSHs (*av_fetch (av, i, 0));	690	PUSHs (*av_fetch (av, i, 0));
473	}	691	}
474	break;	692	break;
475		693
476	case REQ_NOP:	694	case EIO_NOP:
477	case REQ_BUSY:	695	case EIO_BUSY:
478	break;	696	break;
479		697
480	case REQ_READLINK:	698	case EIO_READLINK:
		699	case EIO_REALPATH:
481	if (req->result > 0)	700	if (req->result > 0)
		701	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		702	break;
		703
		704	case EIO_STAT:
		705	case EIO_LSTAT:
		706	case EIO_FSTAT:
		707	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		708
		709	if (!(PL_laststatval = req->result))
		710	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		711	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		712
		713	PUSHs (sv_result);
		714	break;
		715
		716	case EIO_SEEK:
		717	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		718	break;
		719
		720	case EIO_READ:
		721	{
		722	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		723	*SvEND (req->sv2) = 0;
		724	SvPOK_only (req->sv2);
		725	SvSETMAGIC (req->sv2);
		726	PUSHs (sv_result);
		727	}
		728	break;
		729
		730	case EIO_SLURP:
		731	{
		732	if (req->result >= 0)
		733	{
		734	/* if length was originally not known, we steal the malloc'ed memory */
		735	if (req->flags & EIO_FLAG_PTR2_FREE)
		736	{
		737	req->flags &= ~EIO_FLAG_PTR2_FREE;
		738	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		739	}
		740	else
		741	{
		742	SvCUR_set (req->sv2, req->result);
		743	*SvEND (req->sv2) = 0;
		744	SvPOK_only (req->sv2);
		745	}
		746
		747	SvSETMAGIC (req->sv2);
		748	}
		749
		750	PUSHs (sv_result);
		751	}
		752	break;
		753
		754	case EIO_CUSTOM:
		755	if (req->feed == fiemap)
482	{	756	{
483	SvCUR_set (req->sv1, req->result);	757	#if HAVE_FIEMAP
484	*SvEND (req->sv1) = 0;
485	PUSHs (req->sv1);	758	if (!req->result)
		759	{
		760	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		761
		762	if (fiemap->fm_extent_count)
		763	{
		764	AV *av = newAV ();
		765	int i;
		766
		767	while (fiemap->fm_mapped_extents)
		768	{
		769	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		770	AV *ext_av = newAV ();
		771
		772	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		773	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		774	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		775	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		776
		777	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		778	}
		779
		780	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		781	}
		782	else
		783	{
		784	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		785	PUSHs (sv_result);
		786	}
		787	}
		788	#endif
486	}	789	}
		790	else
		791	PUSHs (sv_result);
487	break;	792	break;
488		793
489	case REQ_STAT:	794	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
490	case REQ_LSTAT:	795	if (req->result > 0)
491	case REQ_FSTAT:	796	SvIV_set (sv_result, 0);
492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	797	/* FALLTHROUGH */
493	PL_laststatval = req->result;
494	PL_statcache = *(Stat_t *)(req->ptr2);
495	PUSHs (sv_2mortal (newSViv (req->result)));
496	break;
497
498	case REQ_READ:
499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
500	*SvEND (req->sv1) = 0;
501	PUSHs (sv_2mortal (newSViv (req->result)));
502	break;
503		798
504	default:	799	default:
505	PUSHs (sv_2mortal (newSViv (req->result)));	800	PUSHs (sv_result);
506	break;	801	break;
507	}	802	}
508		803
509	errno = req->errorno;	804	errno = req->errorno;
510		805
511	PUTBACK;	806	PUTBACK;
512	call_sv (req->callback, G_VOID | G_EVAL);	807	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
513	SPAGAIN;	808	SPAGAIN;
		809
		810	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		811	SvREFCNT_dec (sv_result);
		812	else
		813	sv_result_cache = sv_result;
514		814
515	FREETMPS;	815	FREETMPS;
516	LEAVE;	816	LEAVE;
		817
		818	PUTBACK;
517	}	819	}
518		820
519	if (req->grp)
520	{
521	aio_req grp = req->grp;
522
523	/* unlink request */
524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
526
527	if (grp->grp_first == req)
528	grp->grp_first = req->grp_next;
529
530	aio_grp_dec (grp);
531	}
532
533	return !SvTRUE (ERRSV);	821	return !!SvTRUE (ERRSV);
534	}	822	}
535		823
536	static void req_free (aio_req req)	824	static void
		825	req_destroy (aio_req req)
537	{	826	{
538	if (req->self)	827	if (req->self)
539	{	828	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	829	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	830	SvREFCNT_dec (req->self);
542	}	831	}
543		832
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	833	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	834	SvREFCNT_dec (req->sv2);
		835	SvREFCNT_dec (req->sv3);
		836	SvREFCNT_dec (req->sv4);
547	SvREFCNT_dec (req->callback);	837	SvREFCNT_dec (req->callback);
548		838
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	839	free (req);
553	}	840	}
554		841
		842	static void
555	static void req_cancel_subs (aio_req grp)	843	req_cancel_subs (aio_req grp)
556	{	844	{
557	aio_req sub;
558
559	if (grp->type != REQ_GROUP)	845	if (grp->type != EIO_GROUP)
560	return;	846	return;
561		847
562	SvREFCNT_dec (grp->sv2);	848	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	849	grp->sv2 = 0;
564		850
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	851	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	852	}
568		853
569	static void req_cancel (aio_req req)	854	static void ecb_cold
		855	create_respipe (void)
570	{	856	{
571	req->flags |= FLAG_CANCELLED;	857	if (s_epipe_renew (&respipe))
572		858	croak ("IO::AIO: unable to initialize result pipe");
573	req_cancel_subs (req);
574	}	859	}
575		860
576	static void *aio_proc(void *arg);	861	static void
577		862	poll_wait (void)
578	static void start_thread (void)
579	{	863	{
580	worker *wrk = calloc (1, sizeof (worker));
581
582	if (!wrk)
583	croak ("unable to allocate worker thread data");
584
585	LOCK (wrklock);
586
587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
588	{
589	wrk->prev = &wrk_first;
590	wrk->next = wrk_first.next;
591	wrk_first.next->prev = wrk;
592	wrk_first.next = wrk;
593	++started;
594	}
595	else
596	free (wrk);
597
598	UNLOCK (wrklock);
599	}
600
601	static void maybe_start_thread ()
602	{
603	if (get_nthreads () >= wanted)
604	return;
605
606	/* todo: maybe use idle here, but might be less exact */
607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
608	return;
609
610	start_thread ();
611	}
612
613	static void req_send (aio_req req)
614	{
615	block_sig ();
616
617	++nreqs;
618
619	LOCK (reqlock);
620	++nready;
621	reqq_push (&req_queue, req);
622	COND_SIGNAL (reqwait);
623	UNLOCK (reqlock);
624
625	unblock_sig ();
626
627	maybe_start_thread ();
628	}
629
630	static void end_thread (void)
631	{
632	aio_req req;
633
634	Newz (0, req, 1, aio_cb);
635
636	req->type = REQ_QUIT;
637	req->pri = PRI_MAX + PRI_BIAS;
638
639	LOCK (reqlock);
640	reqq_push (&req_queue, req);
641	COND_SIGNAL (reqwait);
642	UNLOCK (reqlock);
643
644	LOCK (wrklock);
645	--started;
646	UNLOCK (wrklock);
647	}
648
649	static void set_max_idle (int nthreads)
650	{
651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
652	max_idle = nthreads <= 0 ? 1 : nthreads;
653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
654	}
655
656	static void min_parallel (int nthreads)
657	{
658	if (wanted < nthreads)
659	wanted = nthreads;
660	}
661
662	static void max_parallel (int nthreads)
663	{
664	if (wanted > nthreads)
665	wanted = nthreads;
666
667	while (started > wanted)
668	end_thread ();
669	}
670
671	static void poll_wait ()
672	{
673	fd_set rfd;
674
675	while (nreqs)	864	while (eio_nreqs ())
676	{	865	{
677	int size;	866	int size;
678	if (WORDACCESS_UNSAFE) LOCK (reslock);	867
		868	X_LOCK (EIO_POOL->reslock);
679	size = res_queue.size;	869	size = EIO_POOL->res_queue.size;
680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	870	X_UNLOCK (EIO_POOL->reslock);
681		871
682	if (size)	872	if (size)
683	return;	873	return;
684		874
685	maybe_start_thread ();	875	etp_maybe_start_thread (EIO_POOL);
686		876
687	FD_ZERO(&rfd);	877	s_epipe_wait (&respipe);
688	FD_SET(respipe [0], &rfd);
689
690	select (respipe [0] + 1, &rfd, 0, 0, 0);
691	}	878	}
692	}	879	}
693		880
694	static int poll_cb ()	881	static int
		882	poll_cb (void)
695	{	883	{
696	dSP;
697	int count = 0;
698	int maxreqs = max_poll_reqs;
699	int do_croak = 0;
700	struct timeval tv_start, tv_now;
701	aio_req req;
702
703	if (max_poll_time)
704	gettimeofday (&tv_start, 0);
705
706	block_sig ();
707
708	for (;;)	884	for (;;)
709	{	885	{
710	for (;;)	886	int res = eio_poll ();
		887
		888	if (res > 0)
		889	croak (0);
		890
		891	if (!max_outstanding || max_outstanding > eio_nreqs ())
		892	return res;
		893
		894	poll_wait ();
		895	}
		896	}
		897
		898	static void ecb_cold
		899	reinit (void)
		900	{
		901	create_respipe ();
		902
		903	if (eio_init (want_poll, done_poll) < 0)
		904	croak ("IO::AIO: unable to initialise eio library");
		905	}
		906
		907	/*****************************************************************************/
		908
		909	static SV *
		910	get_cb (SV *cb_sv)
		911	{
		912	SvGETMAGIC (cb_sv);
		913	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		914	}
		915
		916	static aio_req ecb_noinline
		917	dreq (SV *callback)
		918	{
		919	SV *cb_cv;
		920	aio_req req;
		921	int req_pri = next_pri;
		922	next_pri = EIO_PRI_DEFAULT;
		923
		924	cb_cv = get_cb (callback);
		925
		926	req = calloc (sizeof (*req), 1);
		927	if (!req)
		928	croak ("out of memory during eio_req allocation");
		929
		930	req->callback = SvREFCNT_inc (cb_cv);
		931	req->pri = req_pri;
		932
		933	return req;
		934	}
		935
		936	#define dREQ \
		937	aio_req req = dreq (callback); \
		938
		939	#define REQ_SEND \
		940	PUTBACK; \
		941	req_submit (req); \
		942	SPAGAIN; \
		943	\
		944	if (GIMME_V != G_VOID) \
		945	XPUSHs (req_sv (req, aio_req_stash));
		946
		947	ecb_inline void
		948	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		949	{
		950	if (expect_false (SvROK (path)))
		951	{
		952	SV *rv = SvRV (path);
		953	SV *wdob;
		954
		955	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
711	{	956	{
712	maybe_start_thread ();	957	path = AvARRAY (rv)[1];
		958	wdob = AvARRAY (rv)[0];
713		959
714	LOCK (reslock);	960	if (SvOK (wdob))
715	req = reqq_shift (&res_queue);
716
717	if (req)
718	{	961	{
719	--npending;	962	*wd = SvAIO_WD (wdob);
720		963	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
721	if (!res_queue.size)
722	{
723	/* read any signals sent by the worker threads */
724	char buf [4];
725	while (read (respipe [0], buf, 4) == 4)
726	;
727	}
728	}
729
730	UNLOCK (reslock);
731
732	if (!req)
733	break;
734
735	--nreqs;
736
737	if (req->type == REQ_GROUP && req->size)
738	{
739	req->int1 = 1; /* mark request as delayed */
740	continue;
741	}	964	}
742	else	965	else
743	{	966	*wd = EIO_INVALID_WD;
744	if (!req_invoke (req))
745	{
746	req_free (req);
747	unblock_sig ();
748	croak (0);
749	}
750
751	count++;
752	}
753
754	req_free (req);
755
756	if (maxreqs && !--maxreqs)
757	break;
758
759	if (max_poll_time)
760	{
761	gettimeofday (&tv_now, 0);
762
763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
764	break;
765	}
766	}	967	}
		968	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		969	{
		970	*wd = (aio_wd)(long)SvIVX (rv);
		971	*wdsv = SvREFCNT_inc_NN (rv);
		972	*ptr = ".";
		973	return; /* path set to "." */
		974	}
		975	else
		976	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		977	}
767		978
768	if (nreqs <= max_outstanding)	979	*pathsv = newSVsv (path);
		980	*ptr = SvPVbyte_nolen (*pathsv);
		981	}
		982
		983	static void ecb_noinline
		984	req_set_path1 (aio_req req, SV *path)
		985	{
		986	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		987	}
		988
		989	static void ecb_noinline
		990	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		991	{
		992	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		993
		994	switch (SvTYPE (rv))
		995	{
		996	case SVt_PVIO:
		997	case SVt_PVLV:
		998	case SVt_PVGV:
		999	req->type = type_fh;
		1000	req->sv1 = newSVsv (fh_or_path);
		1001	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
769	break;	1002	break;
770		1003
771	poll_wait ();	1004	default:
772		1005	req->type = type_path;
773	++maxreqs;	1006	req_set_path1 (req, fh_or_path);
		1007	break;
774	}	1008	}
775
776	unblock_sig ();
777	return count;
778	}
779
780	static void create_pipe ()
781	{
782	if (pipe (respipe))
783	croak ("unable to initialize result pipe");
784
785	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
786	croak ("cannot set result pipe to nonblocking mode");
787
788	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790	}	1009	}
791		1010
792	/*****************************************************************************/	1011	/*****************************************************************************/
793	/* work around various missing functions */
794		1012
795	#if !HAVE_PREADWRITE	1013	static void
796	# define pread aio_pread	1014	ts_set (struct timespec *ts, NV value)
797	# define pwrite aio_pwrite
798
799	/*
800	* make our pread/pwrite safe against themselves, but not against
801	* normal read/write by using a mutex. slows down execution a lot,
802	* but that's your problem, not mine.
803	*/
804	static mutex_t preadwritelock = MUTEX_INIT;
805
806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
807	{	1015	{
808	ssize_t res;	1016	ts->tv_sec = value;
809	off_t ooffset;	1017	ts->tv_nsec = (value - ts->tv_sec) * 1e9;
810
811	LOCK (preadwritelock);
812	ooffset = lseek (fd, 0, SEEK_CUR);
813	lseek (fd, offset, SEEK_SET);
814	res = read (fd, buf, count);
815	lseek (fd, ooffset, SEEK_SET);
816	UNLOCK (preadwritelock);
817
818	return res;
819	}	1018	}
820		1019
821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1020	static NV
		1021	ts_get (const struct timespec *ts)
822	{	1022	{
823	ssize_t res;	1023	return ts->tv_sec + ts->tv_nsec * 1e-9;
824	off_t ooffset;
825
826	LOCK (preadwritelock);
827	ooffset = lseek (fd, 0, SEEK_CUR);
828	lseek (fd, offset, SEEK_SET);
829	res = write (fd, buf, count);
830	lseek (fd, offset, SEEK_SET);
831	UNLOCK (preadwritelock);
832
833	return res;
834	}
835	#endif
836
837	#if !HAVE_FDATASYNC
838	# define fdatasync fsync
839	#endif
840
841	#if !HAVE_READAHEAD
842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
843
844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
845	{
846	dBUF;
847
848	while (count > 0)
849	{
850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
851
852	pread (fd, aio_buf, len, offset);
853	offset += len;
854	count -= len;
855	}
856
857	errno = 0;
858	}
859
860	#endif
861
862	#if !HAVE_READDIR_R
863	# define readdir_r aio_readdir_r
864
865	static mutex_t readdirlock = MUTEX_INIT;
866
867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
868	{
869	struct dirent *e;
870	int errorno;
871
872	LOCK (readdirlock);
873
874	e = readdir (dirp);
875	errorno = errno;
876
877	if (e)
878	{
879	*res = ent;
880	strcpy (ent->d_name, e->d_name);
881	}
882	else
883	*res = 0;
884
885	UNLOCK (readdirlock);
886
887	errno = errorno;
888	return e ? 0 : -1;
889	}
890	#endif
891
892	/* sendfile always needs emulation */
893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
894	{
895	ssize_t res;
896
897	if (!count)
898	return 0;
899
900	#if HAVE_SENDFILE
901	# if __linux
902	res = sendfile (ofd, ifd, &offset, count);
903
904	# elif __freebsd
905	/*
906	* Of course, the freebsd sendfile is a dire hack with no thoughts
907	* wasted on making it similar to other I/O functions.
908	*/
909	{
910	off_t sbytes;
911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
912
913	if (res < 0 && sbytes)
914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
915	res = sbytes;
916	}
917
918	# elif __hpux
919	res = sendfile (ofd, ifd, offset, count, 0, 0);
920
921	# elif __solaris
922	{
923	struct sendfilevec vec;
924	size_t sbytes;
925
926	vec.sfv_fd = ifd;
927	vec.sfv_flag = 0;
928	vec.sfv_off = offset;
929	vec.sfv_len = count;
930
931	res = sendfilev (ofd, &vec, 1, &sbytes);
932
933	if (res < 0 && sbytes)
934	res = sbytes;
935	}
936
937	# endif
938	#else
939	res = -1;
940	errno = ENOSYS;
941	#endif
942
943	if (res < 0
944	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
945	#if __solaris
946	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
947	#endif
948	)
949	)
950	{
951	/* emulate sendfile. this is a major pain in the ass */
952	dBUF;
953
954	res = 0;
955
956	while (count)
957	{
958	ssize_t cnt;
959
960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
961
962	if (cnt <= 0)
963	{
964	if (cnt && !res) res = -1;
965	break;
966	}
967
968	cnt = write (ofd, aio_buf, cnt);
969
970	if (cnt <= 0)
971	{
972	if (cnt && !res) res = -1;
973	break;
974	}
975
976	offset += cnt;
977	res += cnt;
978	count -= cnt;
979	}
980	}
981
982	return res;
983	}
984
985	/* read a full directory */
986	static void scandir_ (aio_req req, worker *self)
987	{
988	DIR *dirp;
989	union
990	{
991	struct dirent d;
992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
993	} *u;
994	struct dirent *entp;
995	char *name, *names;
996	int memlen = 4096;
997	int memofs = 0;
998	int res = 0;
999	int errorno;
1000
1001	LOCK (wrklock);
1002	self->dirp = dirp = opendir (req->ptr1);
1003	self->dbuf = u = malloc (sizeof (*u));
1004	req->flags |= FLAG_PTR2_FREE;
1005	req->ptr2 = names = malloc (memlen);
1006	UNLOCK (wrklock);
1007
1008	if (dirp && u && names)
1009	for (;;)
1010	{
1011	errno = 0;
1012	readdir_r (dirp, &u->d, &entp);
1013
1014	if (!entp)
1015	break;
1016
1017	name = entp->d_name;
1018
1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1020	{
1021	int len = strlen (name) + 1;
1022
1023	res++;
1024
1025	while (memofs + len > memlen)
1026	{
1027	memlen *= 2;
1028	LOCK (wrklock);
1029	req->ptr2 = names = realloc (names, memlen);
1030	UNLOCK (wrklock);
1031
1032	if (!names)
1033	break;
1034	}
1035
1036	memcpy (names + memofs, name, len);
1037	memofs += len;
1038	}
1039	}
1040
1041	if (errno)
1042	res = -1;
1043
1044	req->result = res;
1045	}	1024	}
1046		1025
1047	/*****************************************************************************/	1026	/*****************************************************************************/
1048		1027
1049	static void *aio_proc (void *thr_arg)	1028	XS(boot_IO__AIO) ecb_cold;
1050	{
1051	aio_req req;
1052	struct timespec ts;
1053	worker *self = (worker *)thr_arg;
1054		1029
1055	/* try to distribute timeouts somewhat evenly */
1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1057	* (1000000000UL / 1024UL);
1058
1059	for (;;)
1060	{
1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1062
1063	LOCK (reqlock);
1064
1065	for (;;)
1066	{
1067	self->req = req = reqq_shift (&req_queue);
1068
1069	if (req)
1070	break;
1071
1072	++idle;
1073
1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1075	== ETIMEDOUT)
1076	{
1077	if (idle > max_idle)
1078	{
1079	--idle;
1080	UNLOCK (reqlock);
1081	LOCK (wrklock);
1082	--started;
1083	UNLOCK (wrklock);
1084	goto quit;
1085	}
1086
1087	/* we are allowed to idle, so do so without any timeout */
1088	COND_WAIT (reqwait, reqlock);
1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1090	}
1091
1092	--idle;
1093	}
1094
1095	--nready;
1096
1097	UNLOCK (reqlock);
1098
1099	errno = 0; /* strictly unnecessary */
1100
1101	if (!(req->flags & FLAG_CANCELLED))
1102	switch (req->type)
1103	{
1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1106
1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1109
1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1113
1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1115	case REQ_CLOSE: req->result = close (req->int1); break;
1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
1127	case REQ_READDIR: scandir_ (req, self); break;
1128
1129	case REQ_BUSY:
1130	{
1131	struct timeval tv;
1132
1133	tv.tv_sec = req->int1;
1134	tv.tv_usec = req->int2;
1135
1136	req->result = select (0, 0, 0, 0, &tv);
1137	}
1138
1139	case REQ_GROUP:
1140	case REQ_NOP:
1141	break;
1142
1143	case REQ_QUIT:
1144	goto quit;
1145
1146	default:
1147	req->result = ENOSYS;
1148	break;
1149	}
1150
1151	req->errorno = errno;
1152
1153	LOCK (reslock);
1154
1155	++npending;
1156
1157	if (!reqq_push (&res_queue, req))
1158	{
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	/* optionally signal the main thread asynchronously */
1163	if (main_sig)
1164	pthread_kill (main_tid, main_sig);
1165	}
1166
1167	self->req = 0;
1168	worker_clear (self);
1169
1170	UNLOCK (reslock);
1171	}
1172
1173	quit:
1174	LOCK (wrklock);
1175	worker_free (self);
1176	UNLOCK (wrklock);
1177
1178	return 0;
1179	}
1180
1181	/*****************************************************************************/
1182
1183	static void atfork_prepare (void)
1184	{
1185	LOCK (wrklock);
1186	LOCK (reqlock);
1187	LOCK (reslock);
1188	#if !HAVE_PREADWRITE
1189	LOCK (preadwritelock);
1190	#endif
1191	#if !HAVE_READDIR_R
1192	LOCK (readdirlock);
1193	#endif
1194	}
1195
1196	static void atfork_parent (void)
1197	{
1198	#if !HAVE_READDIR_R
1199	UNLOCK (readdirlock);
1200	#endif
1201	#if !HAVE_PREADWRITE
1202	UNLOCK (preadwritelock);
1203	#endif
1204	UNLOCK (reslock);
1205	UNLOCK (reqlock);
1206	UNLOCK (wrklock);
1207	}
1208
1209	static void atfork_child (void)
1210	{
1211	aio_req prv;
1212
1213	while (prv = reqq_shift (&req_queue))
1214	req_free (prv);
1215
1216	while (prv = reqq_shift (&res_queue))
1217	req_free (prv);
1218
1219	while (wrk_first.next != &wrk_first)
1220	{
1221	worker *wrk = wrk_first.next;
1222
1223	if (wrk->req)
1224	req_free (wrk->req);
1225
1226	worker_clear (wrk);
1227	worker_free (wrk);
1228	}
1229
1230	started = 0;
1231	idle = 0;
1232	nreqs = 0;
1233	nready = 0;
1234	npending = 0;
1235
1236	close (respipe [0]);
1237	close (respipe [1]);
1238	create_pipe ();
1239
1240	atfork_parent ();
1241	}
1242
1243	#define dREQ \
1244	aio_req req; \
1245	int req_pri = next_pri; \
1246	next_pri = DEFAULT_PRI + PRI_BIAS; \
1247	\
1248	if (SvOK (callback) && !SvROK (callback)) \
1249	croak ("callback must be undef or of reference type"); \
1250	\
1251	Newz (0, req, 1, aio_cb); \
1252	if (!req) \
1253	croak ("out of memory during aio_req allocation"); \
1254	\
1255	req->callback = newSVsv (callback); \
1256	req->pri = req_pri
1257
1258	#define REQ_SEND \
1259	req_send (req); \
1260	\
1261	if (GIMME_V != G_VOID) \
1262	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1263
1264	MODULE = IO::AIO PACKAGE = IO::AIO	1030	MODULE = IO::AIO PACKAGE = IO::AIO
1265		1031
1266	PROTOTYPES: ENABLE	1032	PROTOTYPES: ENABLE
1267		1033
1268	BOOT:	1034	BOOT:
1269	{	1035	{
		1036	static const struct {
		1037	const char *name;
		1038	IV iv;
		1039	} *civ, const_iv[] = {
		1040	# define const_niv(name, value) { # name, (IV) value },
		1041	# define const_iv(name) { # name, (IV) name },
		1042	# define const_eio(name) { # name, (IV) EIO_ ## name },
		1043
		1044	/* you have to re-run ./gendef0 after adding/removing any constants here */
		1045	/* the first block can be undef if missing */
		1046	const_iv (ENOSYS)
		1047	const_iv (EXDEV)
		1048	const_iv (EBADR)
		1049
		1050	/* for lseek */
		1051	const_iv (SEEK_DATA)
		1052	const_iv (SEEK_HOLE)
		1053
		1054	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		1055	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1056	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1057	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1058	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1059	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		1060
		1061	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1062	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1063	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1064	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1065	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1066
		1067	/* the second block will be 0 when missing */
		1068	const_iv (O_ACCMODE)
		1069
		1070	const_iv (O_RDONLY)
		1071	const_iv (O_WRONLY)
		1072	const_iv (O_RDWR)
		1073	const_iv (O_CREAT)
		1074	const_iv (O_TRUNC)
		1075	const_iv (O_EXCL)
		1076	const_iv (O_APPEND)
		1077
		1078	const_iv (O_ASYNC)
		1079	const_iv (O_DIRECT)
		1080	const_iv (O_NOATIME)
		1081
		1082	const_iv (O_CLOEXEC)
		1083	const_iv (O_NOCTTY)
		1084	const_iv (O_NOFOLLOW)
		1085	const_iv (O_NONBLOCK)
		1086	const_iv (O_EXEC)
		1087	const_iv (O_SEARCH)
		1088	const_iv (O_DIRECTORY)
		1089	const_iv (O_DSYNC)
		1090	const_iv (O_RSYNC)
		1091	const_iv (O_SYNC)
		1092	const_iv (O_PATH)
		1093	const_iv (O_TMPFILE)
		1094	const_iv (O_TTY_INIT)
		1095
		1096	const_iv (S_IFIFO)
		1097	const_iv (S_IFCHR)
		1098	const_iv (S_IFBLK)
		1099	const_iv (S_IFLNK)
		1100	const_iv (S_IFREG)
		1101	const_iv (S_IFDIR)
		1102	const_iv (S_IFWHT)
		1103	const_iv (S_IFSOCK)
		1104	const_iv (S_IFMT)
		1105
		1106	const_iv (ST_RDONLY)
		1107	const_iv (ST_NOSUID)
		1108	const_iv (ST_NODEV)
		1109	const_iv (ST_NOEXEC)
		1110	const_iv (ST_SYNCHRONOUS)
		1111	const_iv (ST_MANDLOCK)
		1112	const_iv (ST_WRITE)
		1113	const_iv (ST_APPEND)
		1114	const_iv (ST_IMMUTABLE)
		1115	const_iv (ST_NOATIME)
		1116	const_iv (ST_NODIRATIME)
		1117	const_iv (ST_RELATIME)
		1118
		1119	const_iv (PROT_NONE)
		1120	const_iv (PROT_EXEC)
		1121	const_iv (PROT_READ)
		1122	const_iv (PROT_WRITE)
		1123
		1124	const_iv (MAP_PRIVATE)
		1125	const_iv (MAP_SHARED)
		1126	const_iv (MAP_FIXED)
		1127	const_iv (MAP_ANONYMOUS)
		1128
		1129	/* linuxish */
		1130	const_iv (MAP_LOCKED)
		1131	const_iv (MAP_NORESERVE)
		1132	const_iv (MAP_POPULATE)
		1133	const_iv (MAP_NONBLOCK)
		1134	const_iv (MAP_GROWSDOWN)
		1135	const_iv (MAP_32BIT)
		1136	const_iv (MAP_HUGETLB)
		1137	const_iv (MAP_STACK)
		1138
		1139	const_iv (MREMAP_MAYMOVE)
		1140	const_iv (MREMAP_FIXED)
		1141
		1142	const_iv (F_DUPFD_CLOEXEC)
		1143
		1144	const_iv (MSG_CMSG_CLOEXEC)
		1145	const_iv (SOCK_CLOEXEC)
		1146
		1147	const_iv (F_OFD_GETLK)
		1148	const_iv (F_OFD_SETLK)
		1149	const_iv (F_OFD_GETLKW)
		1150
		1151	const_iv (FIFREEZE)
		1152	const_iv (FITHAW)
		1153	const_iv (FITRIM)
		1154	const_iv (FICLONE)
		1155	const_iv (FICLONERANGE)
		1156	const_iv (FIDEDUPERANGE)
		1157
		1158	const_iv (FS_IOC_GETFLAGS)
		1159	const_iv (FS_IOC_SETFLAGS)
		1160	const_iv (FS_IOC_GETVERSION)
		1161	const_iv (FS_IOC_SETVERSION)
		1162	const_iv (FS_IOC_FIEMAP)
		1163	const_iv (FS_IOC_FSGETXATTR)
		1164	const_iv (FS_IOC_FSSETXATTR)
		1165	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1166	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1167	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1168
		1169	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1170
		1171	const_iv (FS_SECRM_FL)
		1172	const_iv (FS_UNRM_FL)
		1173	const_iv (FS_COMPR_FL)
		1174	const_iv (FS_SYNC_FL)
		1175	const_iv (FS_IMMUTABLE_FL)
		1176	const_iv (FS_APPEND_FL)
		1177	const_iv (FS_NODUMP_FL)
		1178	const_iv (FS_NOATIME_FL)
		1179	const_iv (FS_DIRTY_FL)
		1180	const_iv (FS_COMPRBLK_FL)
		1181	const_iv (FS_NOCOMP_FL)
		1182	const_iv (FS_ENCRYPT_FL)
		1183	const_iv (FS_BTREE_FL)
		1184	const_iv (FS_INDEX_FL)
		1185	const_iv (FS_JOURNAL_DATA_FL)
		1186	const_iv (FS_NOTAIL_FL)
		1187	const_iv (FS_DIRSYNC_FL)
		1188	const_iv (FS_TOPDIR_FL)
		1189	const_iv (FS_FL_USER_MODIFIABLE)
		1190
		1191	const_iv (FS_XFLAG_REALTIME)
		1192	const_iv (FS_XFLAG_PREALLOC)
		1193	const_iv (FS_XFLAG_IMMUTABLE)
		1194	const_iv (FS_XFLAG_APPEND)
		1195	const_iv (FS_XFLAG_SYNC)
		1196	const_iv (FS_XFLAG_NOATIME)
		1197	const_iv (FS_XFLAG_NODUMP)
		1198	const_iv (FS_XFLAG_RTINHERIT)
		1199	const_iv (FS_XFLAG_PROJINHERIT)
		1200	const_iv (FS_XFLAG_NOSYMLINKS)
		1201	const_iv (FS_XFLAG_EXTSIZE)
		1202	const_iv (FS_XFLAG_EXTSZINHERIT)
		1203	const_iv (FS_XFLAG_NODEFRAG)
		1204	const_iv (FS_XFLAG_FILESTREAM)
		1205	const_iv (FS_XFLAG_DAX)
		1206	const_iv (FS_XFLAG_HASATTR)
		1207
		1208	const_iv (FIEMAP_FLAG_SYNC)
		1209	const_iv (FIEMAP_FLAG_XATTR)
		1210	const_iv (FIEMAP_FLAGS_COMPAT)
		1211	const_iv (FIEMAP_EXTENT_LAST)
		1212	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1213	const_iv (FIEMAP_EXTENT_DELALLOC)
		1214	const_iv (FIEMAP_EXTENT_ENCODED)
		1215	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1216	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1217	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1218	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1219	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1220	const_iv (FIEMAP_EXTENT_MERGED)
		1221	const_iv (FIEMAP_EXTENT_SHARED)
		1222
		1223	const_iv (SPLICE_F_MOVE)
		1224	const_iv (SPLICE_F_NONBLOCK)
		1225	const_iv (SPLICE_F_MORE)
		1226	const_iv (SPLICE_F_GIFT)
		1227
		1228	const_iv (EFD_CLOEXEC)
		1229	const_iv (EFD_NONBLOCK)
		1230	const_iv (EFD_SEMAPHORE)
		1231
		1232	const_iv (CLOCK_REALTIME)
		1233	const_iv (CLOCK_MONOTONIC)
		1234	const_iv (CLOCK_BOOTTIME)
		1235	const_iv (CLOCK_REALTIME_ALARM)
		1236	const_iv (CLOCK_BOOTTIME_ALARM)
		1237
		1238	const_iv (TFD_NONBLOCK)
		1239	const_iv (TFD_CLOEXEC)
		1240
		1241	const_iv (TFD_TIMER_ABSTIME)
		1242	const_iv (TFD_TIMER_CANCEL_ON_SET)
		1243
		1244	/* these are libeio constants, and are independent of gendef0 */
		1245	const_eio (SEEK_SET)
		1246	const_eio (SEEK_CUR)
		1247	const_eio (SEEK_END)
		1248
		1249	const_eio (MCL_FUTURE)
		1250	const_eio (MCL_CURRENT)
		1251
		1252	const_eio (MS_ASYNC)
		1253	const_eio (MS_INVALIDATE)
		1254	const_eio (MS_SYNC)
		1255
		1256	const_eio (MT_MODIFY)
		1257
		1258	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1259	const_eio (SYNC_FILE_RANGE_WRITE)
		1260	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1261
		1262	const_eio (FALLOC_FL_KEEP_SIZE)
		1263	const_eio (FALLOC_FL_PUNCH_HOLE)
		1264	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1265	const_eio (FALLOC_FL_ZERO_RANGE)
		1266	const_eio (FALLOC_FL_INSERT_RANGE)
		1267	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1268
		1269	const_eio (RENAME_NOREPLACE)
		1270	const_eio (RENAME_EXCHANGE)
		1271	const_eio (RENAME_WHITEOUT)
		1272
		1273	const_eio (READDIR_DENTS)
		1274	const_eio (READDIR_DIRS_FIRST)
		1275	const_eio (READDIR_STAT_ORDER)
		1276	const_eio (READDIR_FOUND_UNKNOWN)
		1277
		1278	const_eio (DT_UNKNOWN)
		1279	const_eio (DT_FIFO)
		1280	const_eio (DT_CHR)
		1281	const_eio (DT_DIR)
		1282	const_eio (DT_BLK)
		1283	const_eio (DT_REG)
		1284	const_eio (DT_LNK)
		1285	const_eio (DT_SOCK)
		1286	const_eio (DT_WHT)
		1287	};
		1288
1270	HV *stash = gv_stashpv ("IO::AIO", 1);	1289	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1290	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1291	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1292	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1271		1293
1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1294	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1295	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1279		1296
1280	create_pipe ();	1297	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);
1282	}
1283		1298
		1299	reinit ();
		1300	}
		1301
1284	void	1302	void
		1303	reinit ()
		1304	PROTOTYPE:
		1305
		1306	void
1285	max_poll_reqs (int nreqs)	1307	max_poll_reqs (unsigned int nreqs)
1286	PROTOTYPE: $	1308	PROTOTYPE: $
1287	CODE:	1309	CODE:
1288	max_poll_reqs = nreqs;	1310	eio_set_max_poll_reqs (nreqs);
1289		1311
1290	void	1312	void
1291	max_poll_time (double nseconds)	1313	max_poll_time (double nseconds)
1292	PROTOTYPE: $	1314	PROTOTYPE: $
1293	CODE:	1315	CODE:
1294	max_poll_time = nseconds * AIO_TICKS;	1316	eio_set_max_poll_time (nseconds);
1295		1317
1296	void	1318	void
1297	min_parallel (int nthreads)	1319	min_parallel (unsigned int nthreads)
1298	PROTOTYPE: $
1299
1300	void
1301	max_parallel (int nthreads)
1302	PROTOTYPE: $
1303
1304	void
1305	max_idle (int nthreads)
1306	PROTOTYPE: $	1320	PROTOTYPE: $
1307	CODE:	1321	CODE:
1308	set_max_idle (nthreads);	1322	eio_set_min_parallel (nthreads);
1309		1323
1310	int	1324	void
1311	max_outstanding (int maxreqs)	1325	max_parallel (unsigned int nthreads)
1312	PROTOTYPE: $	1326	PROTOTYPE: $
1313	CODE:	1327	CODE:
1314	RETVAL = max_outstanding;	1328	eio_set_max_parallel (nthreads);
		1329
		1330	void
		1331	max_idle (unsigned int nthreads)
		1332	PROTOTYPE: $
		1333	CODE:
		1334	eio_set_max_idle (nthreads);
		1335
		1336	void
		1337	idle_timeout (unsigned int seconds)
		1338	PROTOTYPE: $
		1339	CODE:
		1340	eio_set_idle_timeout (seconds);
		1341
		1342	void
		1343	max_outstanding (unsigned int maxreqs)
		1344	PROTOTYPE: $
		1345	CODE:
1315	max_outstanding = maxreqs;	1346	max_outstanding = maxreqs;
1316	OUTPUT:
1317	RETVAL
1318		1347
1319	void	1348	void
1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1349	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
1321	SV8 * pathname
1322	int flags
1323	int mode
1324	SV * callback
1325	PROTOTYPE: $$$;$
1326	PPCODE:	1350	PPCODE:
1327	{	1351	{
1328	dREQ;	1352	dREQ;
1329		1353
		1354	req->type = EIO_WD_OPEN;
		1355	req_set_path1 (req, pathname);
		1356
		1357	REQ_SEND;
		1358	}
		1359
		1360	void
		1361	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1362	PPCODE:
		1363	{
		1364	dREQ;
		1365
1330	req->type = REQ_OPEN;	1366	req->type = EIO_OPEN;
1331	req->sv1 = newSVsv (pathname);	1367	req_set_path1 (req, pathname);
1332	req->ptr1 = SvPVbyte_nolen (req->sv1);
1333	req->int1 = flags;	1368	req->int1 = flags;
1334	req->mode = mode;	1369	req->int2 = mode;
1335		1370
1336	REQ_SEND;	1371	REQ_SEND;
1337	}	1372	}
1338		1373
1339	void	1374	void
1340	aio_close (fh,callback=&PL_sv_undef)	1375	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
1341	SV * fh
1342	SV * callback
1343	PROTOTYPE: $;$
1344	ALIAS:	1376	ALIAS:
1345	aio_close = REQ_CLOSE
1346	aio_fsync = REQ_FSYNC	1377	aio_fsync = EIO_FSYNC
1347	aio_fdatasync = REQ_FDATASYNC	1378	aio_fdatasync = EIO_FDATASYNC
		1379	aio_syncfs = EIO_SYNCFS
1348	PPCODE:	1380	PPCODE:
1349	{	1381	{
		1382	int fd = s_fileno_croak (fh, 0);
1350	dREQ;	1383	dREQ;
1351		1384
1352	req->type = ix;	1385	req->type = ix;
1353	req->fh = newSVsv (fh);	1386	req->sv1 = newSVsv (fh);
1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1387	req->int1 = fd;
1355		1388
1356	REQ_SEND (req);	1389	REQ_SEND;
1357	}	1390	}
1358		1391
1359	void	1392	void
		1393	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1394	PPCODE:
		1395	{
		1396	int fd = s_fileno_croak (fh, 0);
		1397	dREQ;
		1398
		1399	req->type = EIO_SYNC_FILE_RANGE;
		1400	req->sv1 = newSVsv (fh);
		1401	req->int1 = fd;
		1402	req->offs = offset;
		1403	req->size = nbytes;
		1404	req->int2 = flags;
		1405
		1406	REQ_SEND;
		1407	}
		1408
		1409	void
		1410	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1411	PPCODE:
		1412	{
		1413	int fd = s_fileno_croak (fh, 0);
		1414	dREQ;
		1415
		1416	req->type = EIO_FALLOCATE;
		1417	req->sv1 = newSVsv (fh);
		1418	req->int1 = fd;
		1419	req->int2 = mode;
		1420	req->offs = offset;
		1421	req->size = len;
		1422
		1423	REQ_SEND;
		1424	}
		1425
		1426	void
		1427	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1428	PPCODE:
		1429	{
		1430	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1431	int fd = s_fileno_croak (fh, 0);
		1432	dREQ;
		1433
		1434	if (expect_false (close_fd < 0))
		1435	{
		1436	int pipefd [2];
		1437
		1438	if (
		1439	#ifdef _WIN32
		1440	_pipe (pipefd, 1, _O_BINARY) < 0
		1441	#else
		1442	pipe (pipefd) < 0
		1443	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1444	#endif
		1445	|| close (pipefd [1]) < 0
		1446	)
		1447	abort (); /*D*/
		1448
		1449	close_fd = pipefd [0];
		1450	}
		1451
		1452	req->type = EIO_DUP2;
		1453	req->int1 = close_fd;
		1454	req->sv2 = newSVsv (fh);
		1455	req->int2 = fd;
		1456
		1457	REQ_SEND;
		1458	}
		1459
		1460	void
		1461	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1462	PPCODE:
		1463	{
		1464	int fd = s_fileno_croak (fh, 0);
		1465	dREQ;
		1466
		1467	req->type = EIO_SEEK;
		1468	req->sv1 = newSVsv (fh);
		1469	req->int1 = fd;
		1470	req->offs = SvVAL64 (offset);
		1471	req->int2 = whence;
		1472
		1473	REQ_SEND;
		1474	}
		1475
		1476	void
1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1477	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1361	SV * fh
1362	UV offset
1363	UV length
1364	SV8 * data
1365	UV dataoffset
1366	SV * callback
1367	ALIAS:	1478	ALIAS:
1368	aio_read = REQ_READ	1479	aio_read = EIO_READ
1369	aio_write = REQ_WRITE	1480	aio_write = EIO_WRITE
1370	PROTOTYPE: $$$$$;$
1371	PPCODE:	1481	PPCODE:
1372	{	1482	{
1373	STRLEN svlen;	1483	STRLEN svlen;
		1484	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1374	char *svptr = SvPVbyte (data, svlen);	1485	char *svptr = SvPVbyte (data, svlen);
1375		1486	UV len = SvUV (length);
1376	SvUPGRADE (data, SVt_PV);
1377	SvPOK_on (data);
1378		1487
1379	if (dataoffset < 0)	1488	if (dataoffset < 0)
1380	dataoffset += svlen;	1489	dataoffset += svlen;
1381		1490
1382	if (dataoffset < 0 || dataoffset > svlen)	1491	if (dataoffset < 0 || dataoffset > svlen)
1383	croak ("data offset outside of string");	1492	croak ("dataoffset outside of data scalar");
1384		1493
1385	if (ix == REQ_WRITE)	1494	if (ix == EIO_WRITE)
1386	{	1495	{
1387	/* write: check length and adjust. */	1496	/* write: check length and adjust. */
1388	if (length < 0 || length + dataoffset > svlen)	1497	if (!SvOK (length) || len + dataoffset > svlen)
1389	length = svlen - dataoffset;	1498	len = svlen - dataoffset;
1390	}	1499	}
1391	else	1500	else
1392	{	1501	{
1393	/* read: grow scalar as necessary */	1502	/* read: check type and grow scalar as necessary */
		1503	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1394	svptr = SvGROW (data, length + dataoffset + 1);	1504	svptr = sv_grow (data, len + dataoffset + 1);
		1505	else if (SvCUR (data) < len + dataoffset)
		1506	croak ("length + dataoffset outside of scalar, and cannot grow");
1395	}	1507	}
1396
1397	if (length < 0)
1398	croak ("length must not be negative");
1399		1508
1400	{	1509	{
1401	dREQ;	1510	dREQ;
1402		1511
1403	req->type = ix;	1512	req->type = ix;
1404	req->fh = newSVsv (fh);	1513	req->sv1 = newSVsv (fh);
1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1514	req->int1 = fd;
1406	: IoOFP (sv_2io (fh)));	1515	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1407	req->offs = offset;
1408	req->size = length;	1516	req->size = len;
1409	req->sv1 = SvREFCNT_inc (data);	1517	req->sv2 = SvREFCNT_inc (data);
1410	req->ptr1 = (char *)svptr + dataoffset;	1518	req->ptr2 = (char *)svptr + dataoffset;
1411	req->stroffset = dataoffset;	1519	req->stroffset = dataoffset;
1412		1520
1413	if (!SvREADONLY (data))	1521	if (!SvREADONLY (data))
1414	{	1522	{
1415	SvREADONLY_on (data);	1523	SvREADONLY_on (data);
1416	req->flags |= FLAG_SV1_RO_OFF;	1524	req->flags |= FLAG_SV2_RO_OFF;
1417	}	1525	}
1418		1526
1419	REQ_SEND;	1527	REQ_SEND;
1420	}	1528	}
1421	}	1529	}
1422		1530
1423	void	1531	void
1424	aio_readlink (path,callback=&PL_sv_undef)	1532	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1425	SV8 * path	1533	ALIAS:
1426	SV * callback	1534	aio_ioctl = EIO_IOCTL
1427	PROTOTYPE: $$;$	1535	aio_fcntl = EIO_FCNTL
1428	PPCODE:	1536	PPCODE:
1429	{	1537	{
1430	SV *data;	1538	int fd = s_fileno_croak (fh, 0);
		1539	char *svptr;
		1540
		1541	if (SvPOK (arg) || !SvNIOK (arg))
		1542	{
		1543	STRLEN svlen;
		1544	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
		1545	#ifdef IOCPARM_LEN
		1546	STRLEN need = IOCPARM_LEN (request);
		1547	#else
		1548	STRLEN need = 256;
		1549	#endif
		1550
		1551	if (svlen < need)
		1552	svptr = SvGROW (arg, need);
		1553	}
		1554	else
		1555	svptr = (char *)SvIV (arg);
		1556
		1557	{
		1558	dREQ;
		1559
		1560	req->type = ix;
		1561	req->sv1 = newSVsv (fh);
		1562	req->int1 = fd;
		1563	req->int2 = (long)request;
		1564	req->sv2 = SvREFCNT_inc (arg);
		1565	req->ptr2 = svptr;
		1566
		1567	REQ_SEND;
		1568	}
		1569	}
		1570
		1571	void
		1572	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1573	ALIAS:
		1574	aio_readlink = EIO_READLINK
		1575	aio_realpath = EIO_REALPATH
		1576	PPCODE:
		1577	{
1431	dREQ;	1578	dREQ;
1432		1579
1433	data = newSV (NAME_MAX);
1434	SvPOK_on (data);
1435
1436	req->type = REQ_READLINK;	1580	req->type = ix;
1437	req->fh = newSVsv (path);	1581	req_set_path1 (req, pathname);
1438	req->ptr2 = SvPVbyte_nolen (req->fh);
1439	req->sv1 = data;
1440	req->ptr1 = SvPVbyte_nolen (data);
1441		1582
1442	REQ_SEND;	1583	REQ_SEND;
1443	}	1584	}
1444		1585
1445	void	1586	void
1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1587	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1447	SV * out_fh
1448	SV * in_fh
1449	UV in_offset
1450	UV length
1451	SV * callback
1452	PROTOTYPE: $$$$;$
1453	PPCODE:	1588	PPCODE:
1454	{	1589	{
		1590	int ifd = s_fileno_croak (in_fh , 0);
		1591	int ofd = s_fileno_croak (out_fh, 1);
1455	dREQ;	1592	dREQ;
1456		1593
1457	req->type = REQ_SENDFILE;	1594	req->type = EIO_SENDFILE;
1458	req->fh = newSVsv (out_fh);	1595	req->sv1 = newSVsv (out_fh);
1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1596	req->int1 = ofd;
1460	req->sv2 = newSVsv (in_fh);	1597	req->sv2 = newSVsv (in_fh);
1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1598	req->int2 = ifd;
1462	req->offs = in_offset;	1599	req->offs = in_offset;
1463	req->size = length;	1600	req->size = length;
1464		1601
1465	REQ_SEND;	1602	REQ_SEND;
1466	}	1603	}
1467		1604
1468	void	1605	void
1469	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1606	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1470	SV * fh
1471	UV offset
1472	IV length
1473	SV * callback
1474	PROTOTYPE: $$$;$
1475	PPCODE:	1607	PPCODE:
1476	{	1608	{
		1609	int fd = s_fileno_croak (fh, 0);
1477	dREQ;	1610	dREQ;
1478		1611
1479	req->type = REQ_READAHEAD;	1612	req->type = EIO_READAHEAD;
1480	req->fh = newSVsv (fh);	1613	req->sv1 = newSVsv (fh);
1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	1614	req->int1 = fd;
1482	req->offs = offset;	1615	req->offs = offset;
1483	req->size = length;	1616	req->size = length;
1484		1617
1485	REQ_SEND;	1618	REQ_SEND;
1486	}	1619	}
1487		1620
1488	void	1621	void
1489	aio_stat (fh_or_path,callback=&PL_sv_undef)	1622	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1490	SV8 * fh_or_path
1491	SV * callback
1492	ALIAS:	1623	ALIAS:
1493	aio_stat = REQ_STAT	1624	aio_stat = EIO_STAT
1494	aio_lstat = REQ_LSTAT	1625	aio_lstat = EIO_LSTAT
		1626	aio_statvfs = EIO_STATVFS
1495	PPCODE:	1627	PPCODE:
1496	{	1628	{
1497	dREQ;	1629	dREQ;
1498		1630
1499	req->ptr2 = malloc (sizeof (Stat_t));	1631	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1500	if (!req->ptr2)
1501	{
1502	req_free (req);
1503	croak ("out of memory during aio_stat statdata allocation");
1504	}
1505
1506	req->flags |= FLAG_PTR2_FREE;
1507
1508	if (SvPOK (fh_or_path))
1509	{
1510	req->type = ix;
1511	req->sv1 = newSVsv (fh_or_path);
1512	req->ptr1 = SvPVbyte_nolen (req->sv1);
1513	}
1514	else
1515	{
1516	req->type = REQ_FSTAT;
1517	req->fh = newSVsv (fh_or_path);
1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1519	}
1520		1632
1521	REQ_SEND;	1633	REQ_SEND;
1522	}	1634	}
1523		1635
1524	void	1636	void
		1637	st_xtime ()
		1638	ALIAS:
		1639	st_atime = 1
		1640	st_mtime = 2
		1641	st_ctime = 4
		1642	st_xtime = 7
		1643	PPCODE:
		1644	EXTEND (SP, 3);
		1645	if (ix & 1) PUSHs (newSVnv (PL_statcache.st_atime + 1e-9 * ATIMENSEC));
		1646	if (ix & 2) PUSHs (newSVnv (PL_statcache.st_mtime + 1e-9 * MTIMENSEC));
		1647	if (ix & 4) PUSHs (newSVnv (PL_statcache.st_ctime + 1e-9 * CTIMENSEC));
		1648
		1649	void
		1650	st_xtimensec ()
		1651	ALIAS:
		1652	st_atimensec = 1
		1653	st_mtimensec = 2
		1654	st_ctimensec = 4
		1655	st_xtimensec = 7
		1656	PPCODE:
		1657	EXTEND (SP, 3);
		1658	if (ix & 1) PUSHs (newSViv (ATIMENSEC));
		1659	if (ix & 2) PUSHs (newSViv (MTIMENSEC));
		1660	if (ix & 4) PUSHs (newSViv (CTIMENSEC));
		1661
		1662	UV
		1663	major (UV dev)
		1664	ALIAS:
		1665	minor = 1
		1666	CODE:
		1667	RETVAL = ix ? minor (dev) : major (dev);
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	UV
		1672	makedev (UV maj, UV min)
		1673	CODE:
		1674	RETVAL = makedev (maj, min);
		1675	OUTPUT:
		1676	RETVAL
		1677
		1678	void
		1679	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1680	PPCODE:
		1681	{
		1682	dREQ;
		1683
		1684	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1685	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1686	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1687
		1688	REQ_SEND;
		1689	}
		1690
		1691	void
		1692	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1693	PPCODE:
		1694	{
		1695	dREQ;
		1696
		1697	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1698	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1699
		1700	REQ_SEND;
		1701	}
		1702
		1703	void
		1704	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1705	PPCODE:
		1706	{
		1707	dREQ;
		1708
		1709	req->int2 = mode;
		1710	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1711
		1712	REQ_SEND;
		1713	}
		1714
		1715	void
		1716	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1717	PPCODE:
		1718	{
		1719	dREQ;
		1720
		1721	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1722	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1723	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1724
		1725	REQ_SEND;
		1726	}
		1727
		1728	void
		1729	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1730	PPCODE:
		1731	{
		1732	dREQ;
		1733
		1734	req->type = EIO_READDIR;
		1735	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1736
		1737	if (flags & EIO_READDIR_DENTS)
		1738	req->int1 |= EIO_READDIR_CUSTOM2;
		1739
		1740	req_set_path1 (req, pathname);
		1741
		1742	REQ_SEND;
		1743	}
		1744
		1745	void
		1746	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1747	PPCODE:
		1748	{
		1749	dREQ;
		1750
		1751	req->type = EIO_MKDIR;
		1752	req->int2 = mode;
		1753	req_set_path1 (req, pathname);
		1754
		1755	REQ_SEND;
		1756	}
		1757
		1758	void
1525	aio_unlink (pathname,callback=&PL_sv_undef)	1759	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1526	SV8 * pathname
1527	SV * callback
1528	ALIAS:	1760	ALIAS:
1529	aio_unlink = REQ_UNLINK	1761	aio_unlink = EIO_UNLINK
1530	aio_rmdir = REQ_RMDIR	1762	aio_rmdir = EIO_RMDIR
1531	aio_readdir = REQ_READDIR	1763	aio_readdir = EIO_READDIR
1532	PPCODE:	1764	PPCODE:
1533	{	1765	{
1534	dREQ;	1766	dREQ;
1535		1767
1536	req->type = ix;	1768	req->type = ix;
1537	req->sv1 = newSVsv (pathname);	1769	req_set_path1 (req, pathname);
1538	req->ptr1 = SvPVbyte_nolen (req->sv1);
1539		1770
1540	REQ_SEND;	1771	REQ_SEND;
1541	}	1772	}
1542		1773
1543	void	1774	void
1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
1545	SV8 * pathname
1546	UV mode
1547	SV * callback
1548	PPCODE:
1549	{
1550	dREQ;
1551
1552	req->type = REQ_MKDIR;
1553	req->sv1 = newSVsv (pathname);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
1555	req->mode = mode;
1556
1557	REQ_SEND;
1558	}
1559
1560	void
1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1775	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1562	SV8 * oldpath
1563	SV8 * newpath
1564	SV * callback
1565	ALIAS:	1776	ALIAS:
1566	aio_link = REQ_LINK	1777	aio_link = EIO_LINK
1567	aio_symlink = REQ_SYMLINK	1778	aio_symlink = EIO_SYMLINK
1568	aio_rename = REQ_RENAME	1779	aio_rename = EIO_RENAME
1569	PPCODE:	1780	PPCODE:
1570	{	1781	{
		1782	eio_wd wd2 = 0;
1571	dREQ;	1783	dREQ;
1572		1784
1573	req->type = ix;	1785	req->type = ix;
1574	req->fh = newSVsv (oldpath);	1786	req_set_path1 (req, oldpath);
1575	req->ptr2 = SvPVbyte_nolen (req->fh);	1787	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1576	req->sv1 = newSVsv (newpath);	1788	req->int3 = (long)wd2;
1577	req->ptr1 = SvPVbyte_nolen (req->sv1);
1578		1789
1579	REQ_SEND;	1790	REQ_SEND;
1580	}	1791	}
1581		1792
1582	void	1793	void
1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1794	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1584	SV8 * pathname
1585	UV mode
1586	UV dev
1587	SV * callback
1588	PPCODE:	1795	PPCODE:
1589	{	1796	{
		1797	eio_wd wd2 = 0;
1590	dREQ;	1798	dREQ;
1591		1799
1592	req->type = REQ_MKNOD;	1800	req->type = EIO_RENAME;
1593	req->sv1 = newSVsv (pathname);	1801	req_set_path1 (req, oldpath);
1594	req->ptr1 = SvPVbyte_nolen (req->sv1);	1802	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1595	req->mode = (mode_t)mode;	1803	req->int2 = flags;
1596	req->offs = dev;	1804	req->int3 = (long)wd2;
1597		1805
1598	REQ_SEND;	1806	REQ_SEND;
1599	}	1807	}
1600		1808
1601	void	1809	void
1602	aio_busy (delay,callback=&PL_sv_undef)	1810	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1603	double delay
1604	SV * callback
1605	PPCODE:	1811	PPCODE:
1606	{	1812	{
1607	dREQ;	1813	dREQ;
1608		1814
1609	req->type = REQ_BUSY;	1815	req->type = EIO_MKNOD;
1610	req->int1 = delay < 0. ? 0 : delay;	1816	req->int2 = (mode_t)mode;
1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);	1817	req->offs = dev;
1612		1818	req_set_path1 (req, pathname);
		1819
1613	REQ_SEND;	1820	REQ_SEND;
1614	}	1821	}
1615		1822
1616	void	1823	void
1617	aio_group (callback=&PL_sv_undef)	1824	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
1618	SV * callback	1825	ALIAS:
1619	PROTOTYPE: ;$	1826	aio_mtouch = EIO_MTOUCH
		1827	aio_msync = EIO_MSYNC
1620	PPCODE:	1828	PPCODE:
1621	{	1829	{
		1830	STRLEN svlen;
		1831	char *svptr = SvPVbyte (data, svlen);
		1832	UV len = SvUV (length);
		1833
		1834	if (flags < 0)
		1835	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1836
		1837	if (offset < 0)
		1838	offset += svlen;
		1839
		1840	if (offset < 0 || offset > svlen)
		1841	croak ("offset outside of scalar");
		1842
		1843	if (!SvOK (length) || len + offset > svlen)
		1844	len = svlen - offset;
		1845
		1846	{
		1847	dREQ;
		1848
		1849	req->type = ix;
		1850	req->sv2 = SvREFCNT_inc (data);
		1851	req->ptr2 = (char *)svptr + offset;
		1852	req->size = len;
		1853	req->int1 = flags;
		1854
		1855	REQ_SEND;
		1856	}
		1857	}
		1858
		1859	void
		1860	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1861	PPCODE:
		1862	{
		1863	STRLEN svlen;
		1864	char *svptr = SvPVbyte (data, svlen);
		1865	UV len = SvUV (length);
		1866
		1867	if (offset < 0)
		1868	offset += svlen;
		1869
		1870	if (offset < 0 || offset > svlen)
		1871	croak ("offset outside of scalar");
		1872
		1873	if (!SvOK (length) || len + offset > svlen)
		1874	len = svlen - offset;
		1875
		1876	{
		1877	dREQ;
		1878
		1879	req->type = EIO_MLOCK;
		1880	req->sv2 = SvREFCNT_inc (data);
		1881	req->ptr2 = (char *)svptr + offset;
		1882	req->size = len;
		1883
		1884	REQ_SEND;
		1885	}
		1886	}
		1887
		1888	void
		1889	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1890	PPCODE:
		1891	{
		1892	dREQ;
		1893
		1894	req->type = EIO_MLOCKALL;
		1895	req->int1 = flags;
		1896
		1897	REQ_SEND;
		1898	}
		1899
		1900	void
		1901	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1902	PPCODE:
		1903	{
		1904	int fd = s_fileno_croak (fh, 0);
1622	dREQ;	1905	dREQ;
1623		1906
1624	req->type = REQ_GROUP;	1907	req->type = EIO_CUSTOM;
		1908	req->sv1 = newSVsv (fh);
		1909	req->int1 = fd;
1625		1910
1626	req_send (req);	1911	req->feed = fiemap;
1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1912	#if HAVE_FIEMAP
1628	}	1913	/* keep our fingers crossed that the next two types are 64 bit */
		1914	req->offs = start;
		1915	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1916	req->int2 = flags;
		1917	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1918	#endif
1629		1919
		1920	REQ_SEND;
		1921	}
		1922
1630	void	1923	void
1631	aio_nop (callback=&PL_sv_undef)	1924	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
1632	SV * callback	1925	PPCODE:
		1926	{
		1927	char *svptr = 0;
		1928
		1929	sv_clear_foreign (data);
		1930
		1931	if (length) /* known length, directly read into scalar */
		1932	{
		1933	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		1934	svptr = sv_grow (data, length + 1);
		1935	else if (SvCUR (data) < length)
		1936	croak ("length outside of scalar, and cannot grow");
		1937	else
		1938	svptr = SvPVbyte_nolen (data);
		1939	}
		1940
		1941	{
		1942	dREQ;
		1943
		1944	req->type = EIO_SLURP;
		1945	req_set_path1 (req, pathname);
		1946	req->offs = offset;
		1947	req->size = length;
		1948	req->sv2 = SvREFCNT_inc (data);
		1949	req->ptr2 = svptr;
		1950
		1951	if (!SvREADONLY (data))
		1952	{
		1953	SvREADONLY_on (data);
		1954	req->flags |= FLAG_SV2_RO_OFF;
		1955	}
		1956
		1957	REQ_SEND;
		1958	}
		1959	}
		1960
		1961	void
		1962	aio_busy (double delay, SV *callback = &PL_sv_undef)
1633	PPCODE:	1963	PPCODE:
1634	{	1964	{
1635	dREQ;	1965	dREQ;
1636		1966
1637	req->type = REQ_NOP;	1967	req->type = EIO_BUSY;
		1968	req->nv1 = delay < 0. ? 0. : delay;
1638		1969
1639	REQ_SEND;	1970	REQ_SEND;
1640	}	1971	}
1641		1972
		1973	void
		1974	aio_group (SV *callback = &PL_sv_undef)
		1975	PPCODE:
		1976	{
		1977	dREQ;
		1978
		1979	req->type = EIO_GROUP;
		1980
		1981	PUTBACK;
		1982	req_submit (req);
		1983	SPAGAIN;
		1984
		1985	XPUSHs (req_sv (req, aio_grp_stash));
		1986	}
		1987
		1988	void
		1989	aio_nop (SV *callback = &PL_sv_undef)
		1990	ALIAS:
		1991	aio_nop = EIO_NOP
		1992	aio_sync = EIO_SYNC
		1993	PPCODE:
		1994	{
		1995	dREQ;
		1996
		1997	req->type = ix;
		1998
		1999	REQ_SEND;
		2000	}
		2001
1642	int	2002	int
1643	aioreq_pri (int pri = 0)	2003	aioreq_pri (int pri = NO_INIT)
1644	PROTOTYPE: ;$
1645	CODE:	2004	CODE:
1646	RETVAL = next_pri - PRI_BIAS;	2005	RETVAL = next_pri;
1647	if (items > 0)	2006	if (items > 0)
1648	{	2007	{
1649	if (pri < PRI_MIN) pri = PRI_MIN;	2008	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1650	if (pri > PRI_MAX) pri = PRI_MAX;	2009	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1651	next_pri = pri + PRI_BIAS;	2010	next_pri = pri;
1652	}	2011	}
1653	OUTPUT:	2012	OUTPUT:
1654	RETVAL	2013	RETVAL
1655		2014
1656	void	2015	void
1657	aioreq_nice (int nice = 0)	2016	aioreq_nice (int nice = 0)
1658	CODE:	2017	CODE:
1659	nice = next_pri - nice;	2018	nice = next_pri - nice;
1660	if (nice < PRI_MIN) nice = PRI_MIN;	2019	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1661	if (nice > PRI_MAX) nice = PRI_MAX;	2020	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1662	next_pri = nice + PRI_BIAS;	2021	next_pri = nice;
1663		2022
1664	void	2023	void
1665	flush ()	2024	flush ()
1666	PROTOTYPE:
1667	CODE:	2025	CODE:
1668	while (nreqs)	2026	while (eio_nreqs ())
1669	{	2027	{
1670	poll_wait ();	2028	poll_wait ();
1671	poll_cb ();	2029	poll_cb ();
1672	}	2030	}
1673		2031
1674	int	2032	int
1675	poll()	2033	poll ()
1676	PROTOTYPE:
1677	CODE:	2034	CODE:
1678	poll_wait ();	2035	poll_wait ();
1679	RETVAL = poll_cb ();	2036	RETVAL = poll_cb ();
1680	OUTPUT:	2037	OUTPUT:
1681	RETVAL	2038	RETVAL
1682		2039
1683	int	2040	int
1684	poll_fileno()	2041	poll_fileno ()
1685	PROTOTYPE:
1686	CODE:	2042	CODE:
1687	RETVAL = respipe [0];	2043	RETVAL = s_epipe_fd (&respipe);
1688	OUTPUT:	2044	OUTPUT:
1689	RETVAL	2045	RETVAL
1690		2046
1691	int	2047	int
1692	poll_cb(...)	2048	poll_cb (...)
1693	PROTOTYPE:	2049	PROTOTYPE:
1694	CODE:	2050	CODE:
1695	RETVAL = poll_cb ();	2051	RETVAL = poll_cb ();
1696	OUTPUT:	2052	OUTPUT:
1697	RETVAL	2053	RETVAL
1698		2054
1699	void	2055	void
1700	poll_wait()	2056	poll_wait ()
1701	PROTOTYPE:
1702	CODE:	2057	CODE:
1703	poll_wait ();	2058	poll_wait ();
1704		2059
1705	void
1706	setsig (int signum = SIGIO)
1707	PROTOTYPE: ;$
1708	CODE:
1709	{
1710	if (block_sig_level)
1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1712
1713	LOCK (reslock);
1714	main_tid = pthread_self ();
1715	main_sig = signum;
1716	UNLOCK (reslock);
1717
1718	if (main_sig && npending)
1719	pthread_kill (main_tid, main_sig);
1720	}
1721
1722	void
1723	aio_block (SV *cb)
1724	PROTOTYPE: &
1725	PPCODE:
1726	{
1727	int count;
1728
1729	block_sig ();
1730	PUSHMARK (SP);
1731	PUTBACK;
1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1733	SPAGAIN;
1734	unblock_sig ();
1735
1736	if (SvTRUE (ERRSV))
1737	croak (0);
1738
1739	XSRETURN (count);
1740	}
1741
1742	int	2060	int
1743	nreqs()	2061	nreqs ()
1744	PROTOTYPE:
1745	CODE:	2062	CODE:
1746	RETVAL = nreqs;	2063	RETVAL = eio_nreqs ();
1747	OUTPUT:	2064	OUTPUT:
1748	RETVAL	2065	RETVAL
1749		2066
1750	int	2067	int
1751	nready()	2068	nready ()
1752	PROTOTYPE:
1753	CODE:	2069	CODE:
1754	RETVAL = get_nready ();	2070	RETVAL = eio_nready ();
1755	OUTPUT:	2071	OUTPUT:
1756	RETVAL	2072	RETVAL
1757		2073
1758	int	2074	int
1759	npending()	2075	npending ()
1760	PROTOTYPE:
1761	CODE:	2076	CODE:
1762	RETVAL = get_npending ();	2077	RETVAL = eio_npending ();
1763	OUTPUT:	2078	OUTPUT:
1764	RETVAL	2079	RETVAL
1765		2080
1766	int	2081	int
1767	nthreads()	2082	nthreads ()
1768	PROTOTYPE:
1769	CODE:	2083	CODE:
1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);	2084	RETVAL = eio_nthreads ();
1771	RETVAL = started;
1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1773	OUTPUT:	2085	OUTPUT:
1774	RETVAL	2086	RETVAL
1775		2087
		2088	int
		2089	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		2090	CODE:
		2091	RETVAL = posix_fadvise (fh, offset, length, advice);
		2092	OUTPUT:
		2093	RETVAL
		2094
		2095	IV
		2096	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		2097	CODE:
		2098	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		2099	OUTPUT:
		2100	RETVAL
		2101
		2102	void
		2103	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2104	PPCODE:
		2105	sv_clear_foreign (scalar);
		2106	{
		2107	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2108	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2109	if (addr == (void *)-1)
		2110	XSRETURN_NO;
		2111
		2112	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2113
		2114	if (!(prot & PROT_WRITE))
		2115	SvREADONLY_on (scalar);
		2116
		2117	XSRETURN_YES;
		2118	}
		2119
		2120	void
		2121	munmap (SV *scalar)
		2122	CODE:
		2123	sv_clear_foreign (scalar);
		2124
		2125	SV *
		2126	mremap (SV *scalar, STRLEN new_length, int flags = MREMAP_MAYMOVE, IV new_address = 0)
		2127	CODE:
		2128	{
		2129	MAGIC *mg = mg_findext (scalar, FOREIGN_MAGIC, &mmap_vtbl);
		2130	void *new;
		2131
		2132	if (!mg || SvPVX (scalar) != mg->mg_ptr)
		2133	croak ("IO::AIO::mremap: scalar not mapped by IO::AIO::mmap or improperly modified");
		2134
		2135	new = mremap (mg->mg_ptr, (size_t)mg->mg_obj, new_length, flags, (void *)new_address);
		2136
		2137	RETVAL = &PL_sv_no;
		2138
		2139	if (new != (void *)-1)
		2140	{
		2141	RETVAL = new == (void *)mg->mg_ptr
		2142	? newSVpvn ("0 but true", 10)
		2143	: &PL_sv_yes;
		2144
		2145	mg->mg_ptr = (char *)new;
		2146	mg->mg_obj = (SV *)new_length;
		2147
		2148	SvPVX (scalar) = mg->mg_ptr;
		2149	SvCUR_set (scalar, new_length);
		2150	}
		2151	}
		2152	OUTPUT:
		2153	RETVAL
		2154
		2155	int
		2156	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2157	ALIAS:
		2158	mprotect = 1
		2159	CODE:
		2160	{
		2161	STRLEN svlen;
		2162	void *addr = SvPVbyte (scalar, svlen);
		2163	STRLEN len = SvUV (length);
		2164
		2165	if (offset < 0)
		2166	offset += svlen;
		2167
		2168	if (offset < 0 || offset > svlen)
		2169	croak ("offset outside of scalar");
		2170
		2171	if (!SvOK (length) || len + offset > svlen)
		2172	len = svlen - offset;
		2173
		2174	addr = (void *)(((intptr_t)addr) + offset);
		2175	eio_page_align (&addr, &len);
		2176
		2177	switch (ix)
		2178	{
		2179	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2180	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2181	}
		2182	}
		2183	OUTPUT:
		2184	RETVAL
		2185
		2186	int
		2187	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		2188	CODE:
		2189	{
		2190	STRLEN svlen;
		2191	void *addr = SvPVbyte (scalar, svlen);
		2192	size_t len = SvUV (length);
		2193
		2194	if (offset < 0)
		2195	offset += svlen;
		2196
		2197	if (offset < 0 || offset > svlen)
		2198	croak ("offset outside of scalar");
		2199
		2200	if (!SvOK (length) || len + offset > svlen)
		2201	len = svlen - offset;
		2202
		2203	addr = (void *)(((intptr_t)addr) + offset);
		2204	eio_page_align (&addr, &len);
		2205	#if _POSIX_MEMLOCK_RANGE
		2206	RETVAL = munlock (addr, len);
		2207	#else
		2208	RETVAL = EIO_ENOSYS ();
		2209	#endif
		2210	}
		2211	OUTPUT:
		2212	RETVAL
		2213
		2214	int
		2215	munlockall ()
		2216	CODE:
		2217	#if _POSIX_MEMLOCK
		2218	munlockall ();
		2219	#else
		2220	RETVAL = EIO_ENOSYS ();
		2221	#endif
		2222	OUTPUT:
		2223	RETVAL
		2224
		2225	int
		2226	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2227	CODE:
		2228	{
		2229	#if HAVE_LINUX_SPLICE
		2230	loff_t off_in_, off_out_;
		2231	RETVAL = splice (
		2232	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2233	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2234	length, flags
		2235	);
		2236	#else
		2237	RETVAL = EIO_ENOSYS ();
		2238	#endif
		2239	}
		2240	OUTPUT:
		2241	RETVAL
		2242
		2243	int
		2244	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2245	CODE:
		2246	#if HAVE_LINUX_SPLICE
		2247	RETVAL = tee (rfh, wfh, length, flags);
		2248	#else
		2249	RETVAL = EIO_ENOSYS ();
		2250	#endif
		2251	OUTPUT:
		2252	RETVAL
		2253
		2254	int
		2255	pipesize (aio_rfd rfh, int new_size = -1)
		2256	PROTOTYPE: $;$
		2257	CODE:
		2258	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2259	if (new_size >= 0)
		2260	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2261	else
		2262	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2263	#else
		2264	errno = ENOSYS;
		2265	RETVAL = -1;
		2266	#endif
		2267	OUTPUT:
		2268	RETVAL
		2269
		2270	void
		2271	pipe2 (int flags = 0)
		2272	PROTOTYPE: ;$
		2273	PPCODE:
		2274	{
		2275	int fd[2];
		2276	int res;
		2277
		2278	if (flags)
		2279	#if HAVE_PIPE2
		2280	res = pipe2 (fd, flags);
		2281	#else
		2282	res = (errno = ENOSYS, -1);
		2283	#endif
		2284	else
		2285	res = pipe (fd);
		2286
		2287	if (!res)
		2288	{
		2289	EXTEND (SP, 2);
		2290	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2291	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2292	}
		2293	}
		2294
		2295	void
		2296	eventfd (unsigned int initval = 0, int flags = 0)
		2297	PPCODE:
		2298	{
		2299	int fd;
		2300	#if HAVE_EVENTFD
		2301	fd = eventfd (initval, flags);
		2302	#else
		2303	fd = (errno = ENOSYS, -1);
		2304	#endif
		2305
		2306	XPUSHs (newmortalFH (fd, O_RDWR));
		2307	}
		2308
		2309	void
		2310	timerfd_create (int clockid, int flags = 0)
		2311	PPCODE:
		2312	{
		2313	int fd;
		2314	#if HAVE_TIMERFD
		2315	fd = timerfd_create (clockid, flags);
		2316	#else
		2317	fd = (errno = ENOSYS, -1);
		2318	#endif
		2319
		2320	XPUSHs (newmortalFH (fd, O_RDWR));
		2321	}
		2322
		2323	void
		2324	timerfd_settime (SV *fh, int flags, NV interval, NV value)
		2325	PPCODE:
		2326	{
		2327	int fd = s_fileno_croak (fh, 0);
		2328	#if HAVE_TIMERFD
		2329	int res;
		2330	struct itimerspec its, ots;
		2331
		2332	ts_set (&its.it_interval, interval);
		2333	ts_set (&its.it_value , value);
		2334	res = timerfd_settime (fd, flags, &its, &ots);
		2335
		2336	if (!res)
		2337	{
		2338	EXTEND (SP, 2);
		2339	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2340	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2341	}
		2342	#else
		2343	errno = ENOSYS;
		2344	#endif
		2345	}
		2346
		2347	void
		2348	timerfd_gettime (SV *fh)
		2349	PPCODE:
		2350	{
		2351	int fd = s_fileno_croak (fh, 0);
		2352	#if HAVE_TIMERFD
		2353	int res;
		2354	struct itimerspec ots;
		2355	res = timerfd_gettime (fd, &ots);
		2356
		2357	if (!res)
		2358	{
		2359	EXTEND (SP, 2);
		2360	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2361	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2362	}
		2363	#else
		2364	errno = ENOSYS;
		2365	#endif
		2366	}
		2367
		2368	UV
		2369	get_fdlimit ()
		2370	CODE:
		2371	#if HAVE_RLIMITS
		2372	struct rlimit rl;
		2373	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2374	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2375	#endif
		2376	XSRETURN_UNDEF;
		2377	OUTPUT:
		2378	RETVAL
		2379
		2380	void
		2381	min_fdlimit (UV limit = 0x7fffffffU)
		2382	CODE:
		2383	{
		2384	#if HAVE_RLIMITS
		2385	struct rlimit rl;
		2386	rlim_t orig_rlim_max;
		2387	UV bit;
		2388
		2389	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2390	goto fail;
		2391
		2392	if (rl.rlim_cur == RLIM_INFINITY)
		2393	XSRETURN_YES;
		2394
		2395	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2396
		2397	if (rl.rlim_cur < limit)
		2398	{
		2399	rl.rlim_cur = limit;
		2400
		2401	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2402	rl.rlim_max = rl.rlim_cur;
		2403	}
		2404
		2405	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2406	XSRETURN_YES;
		2407
		2408	if (errno == EPERM)
		2409	{
		2410	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2411	/* our limit overflows a system-wide limit */
		2412	/* try an adaptive algorithm, but do not lower the hardlimit */
		2413	rl.rlim_max = 0;
		2414	for (bit = 0x40000000U; bit; bit >>= 1)
		2415	{
		2416	rl.rlim_max |= bit;
		2417	rl.rlim_cur = rl.rlim_max;
		2418
		2419	/* nevr decrease the hard limit */
		2420	if (rl.rlim_max < orig_rlim_max)
		2421	break;
		2422
		2423	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2424	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2425	}
		2426
		2427	/* now, raise the soft limit to the max permitted */
		2428	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2429	{
		2430	rl.rlim_cur = rl.rlim_max;
		2431	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2432	errno = EPERM;
		2433	}
		2434	}
		2435	#endif
		2436	fail:
		2437	XSRETURN_UNDEF;
		2438	}
		2439
		2440	void _on_next_submit (SV *cb)
		2441	CODE:
		2442	SvREFCNT_dec (on_next_submit);
		2443	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2444
1776	PROTOTYPES: DISABLE	2445	PROTOTYPES: DISABLE
		2446
		2447	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2448
		2449	BOOT:
		2450	{
		2451	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2452	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2453	}
		2454
		2455	void
		2456	DESTROY (SV *self)
		2457	CODE:
		2458	{
		2459	aio_wd wd = SvAIO_WD (self);
		2460	#if HAVE_AT
		2461	{
		2462	SV *callback = &PL_sv_undef;
		2463	dREQ; /* clobbers next_pri :/ */
		2464	next_pri = req->pri; /* restore next_pri */
		2465	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2466	req->type = EIO_WD_CLOSE;
		2467	req->wd = wd;
		2468	REQ_SEND;
		2469	}
		2470	#else
		2471	eio_wd_close_sync (wd);
		2472	#endif
		2473	}
1777		2474
1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	2475	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1779		2476
1780	void	2477	void
1781	cancel (aio_req_ornot req)	2478	cancel (aio_req_ornot req)
1782	CODE:	2479	CODE:
1783	req_cancel (req);	2480	eio_cancel (req);
1784		2481
1785	void	2482	void
1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	2483	cb (aio_req_ornot req, SV *callback = NO_INIT)
1787	CODE:	2484	PPCODE:
		2485	{
		2486	if (GIMME_V != G_VOID)
		2487	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2488
		2489	if (items > 1)
		2490	{
		2491	SV *cb_cv = get_cb (callback);
		2492
1788	SvREFCNT_dec (req->callback);	2493	SvREFCNT_dec (req->callback);
1789	req->callback = newSVsv (callback);	2494	req->callback = SvREFCNT_inc (cb_cv);
		2495	}
		2496	}
1790		2497
1791	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	2498	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1792		2499
1793	void	2500	void
1794	add (aio_req grp, ...)	2501	add (aio_req grp, ...)
1795	PPCODE:	2502	PPCODE:
1796	{	2503	{
1797	int i;	2504	int i;
1798	aio_req req;
1799
1800	if (main_sig && !block_sig_level)
1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1802		2505
1803	if (grp->int1 == 2)	2506	if (grp->int1 == 2)
1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");	2507	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1805		2508
1806	for (i = 1; i < items; ++i )	2509	for (i = 1; i < items; ++i )
1807	{	2510	{
		2511	aio_req req;
		2512
1808	if (GIMME_V != G_VOID)	2513	if (GIMME_V != G_VOID)
1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2514	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1810		2515
1811	req = SvAIO_REQ (ST (i));	2516	req = SvAIO_REQ (ST (i));
1812		2517
1813	if (req)	2518	if (req)
1814	{	2519	eio_grp_add (grp, req);
1815	++grp->size;
1816	req->grp = grp;
1817
1818	req->grp_prev = 0;
1819	req->grp_next = grp->grp_first;
1820
1821	if (grp->grp_first)
1822	grp->grp_first->grp_prev = req;
1823
1824	grp->grp_first = req;
1825	}
1826	}	2520	}
1827	}	2521	}
1828		2522
1829	void	2523	void
1830	cancel_subs (aio_req_ornot req)	2524	cancel_subs (aio_req_ornot req)
…		…
1839	AV *av;	2533	AV *av;
1840		2534
1841	grp->errorno = errno;	2535	grp->errorno = errno;
1842		2536
1843	av = newAV ();	2537	av = newAV ();
		2538	av_extend (av, items - 1);
1844		2539
1845	for (i = 1; i < items; ++i )	2540	for (i = 1; i < items; ++i )
1846	av_push (av, newSVsv (ST (i)));	2541	av_push (av, newSVsv (ST (i)));
1847		2542
1848	SvREFCNT_dec (grp->sv1);	2543	SvREFCNT_dec (grp->sv1);
…		…
1855	grp->errorno = errorno;	2550	grp->errorno = errorno;
1856		2551
1857	void	2552	void
1858	limit (aio_req grp, int limit)	2553	limit (aio_req grp, int limit)
1859	CODE:	2554	CODE:
1860	grp->int2 = limit;	2555	eio_grp_limit (grp, limit);
1861	aio_grp_feed (grp);
1862		2556
1863	void	2557	void
1864	feed (aio_req grp, SV *callback=&PL_sv_undef)	2558	feed (aio_req grp, SV *callback = &PL_sv_undef)
1865	CODE:	2559	CODE:
1866	{	2560	{
1867	SvREFCNT_dec (grp->sv2);	2561	SvREFCNT_dec (grp->sv2);
1868	grp->sv2 = newSVsv (callback);	2562	grp->sv2 = newSVsv (callback);
		2563	grp->feed = aio_grp_feed;
1869		2564
1870	if (grp->int2 <= 0)	2565	if (grp->int2 <= 0)
1871	grp->int2 = 2;	2566	grp->int2 = 2;
1872		2567
1873	aio_grp_feed (grp);	2568	eio_grp_limit (grp, grp->int2);
1874	}	2569	}
1875		2570

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