Linux-AIO/AIO.xs

#define PERL_NO_GET_CONTEXT

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sched.h>

typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */

#ifndef __NR_pread64
# define __NR_pread64 __NR_pread
#endif
#ifndef __NR_pwrite64
# define __NR_pwrite64 __NR_pwrite
#endif

#define STACKSIZE 1024 /* yeah */

enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};

typedef struct {
  char stack[STACKSIZE];
} aio_thread;

typedef struct aio_cb {
  struct aio_cb *next;

  int type;
  aio_thread *thread;

  int fd;
  off_t offset;
  size_t length;
  ssize_t result;
  mode_t mode; /* open */
  int errorno;
  SV *data, *callback;
  void *dataptr;
  STRLEN dataoffset;

  struct stat64 *statdata;
} aio_cb;

typedef aio_cb *aio_req;

static int started;
static int nreqs;
static int reqpipe[2], respipe[2];

static aio_req qs, qe; /* queue start, queue end */

static int aio_proc(void *arg);

static void
start_thread (void)
{
  aio_thread *thr;

  New (0, thr, 1, aio_thread);

  if (clone (aio_proc,
             &(thr->stack[STACKSIZE]),
             CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND,
             thr) >= 0)
    started++;
  else
    Safefree (thr);
}

static void
send_reqs (void)
{
  /* this write is atomic */
  while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
   {
     qs = qs->next;
     if (!qs) qe = 0;
   }
}

static void
send_req (aio_req req)
{
  nreqs++;
  req->next = 0;

  if (qe)
    qe->next = req;
  else
    qe = qs = req;

  send_reqs ();
}

static void
end_thread (void)
{
  aio_req req;
  New (0, req, 1, aio_cb);
  req->type = REQ_QUIT;

  send_req (req);
}

static void
read_write (pTHX_
            int dowrite, int fd, off_t offset, size_t length,
            SV *data, STRLEN dataoffset, SV *callback)
{
  aio_req req;
  STRLEN svlen;
  char *svptr = SvPV (data, svlen);

  SvUPGRADE (data, SVt_PV);
  SvPOK_on (data);

  if (dataoffset < 0)
    dataoffset += svlen;

  if (dataoffset < 0 || dataoffset > svlen)
    croak ("data offset outside of string");

  if (dowrite)
    {
      /* write: check length and adjust. */
      if (length < 0 || length + dataoffset > svlen)
        length = svlen - dataoffset;
    }
  else
    {
      /* read: grow scalar as necessary */
      svptr = SvGROW (data, length + dataoffset);
    }

  if (length < 0)
    croak ("length must not be negative");

  Newz (0, req, 1, aio_cb);

  if (!req)
    croak ("out of memory during aio_req allocation");

  req->type = dowrite ? REQ_WRITE : REQ_READ;
  req->fd = fd;
  req->offset = offset;
  req->length = length;
  req->data = SvREFCNT_inc (data);
  req->dataptr = (char *)svptr + dataoffset;
  req->callback = SvREFCNT_inc (callback);

  send_req (req);
}

static int
poll_cb (pTHX)
{
  dSP;
  int count = 0;
  aio_req req;

  while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
    {
      if (req->type == REQ_QUIT)
        {
          Safefree (req->thread);
          started--;
        }
      else
        {
          int errorno = errno;
          errno = req->errorno;

          if (req->type == REQ_READ)
            SvCUR_set (req->data, req->dataoffset
                                  + req->result > 0 ? req->result : 0);

          if (req->data)
            SvREFCNT_dec (req->data);

          if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
            {
              PL_laststype            = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
              PL_laststatval          = req->result;
              PL_statcache.st_dev     = req->statdata->st_dev;
              PL_statcache.st_ino     = req->statdata->st_ino;
              PL_statcache.st_mode    = req->statdata->st_mode;
              PL_statcache.st_nlink   = req->statdata->st_nlink;
              PL_statcache.st_uid     = req->statdata->st_uid;
              PL_statcache.st_gid     = req->statdata->st_gid;
              PL_statcache.st_rdev    = req->statdata->st_rdev;
              PL_statcache.st_size    = req->statdata->st_size;
              PL_statcache.st_atime   = req->statdata->st_atime;
              PL_statcache.st_mtime   = req->statdata->st_mtime;
              PL_statcache.st_ctime   = req->statdata->st_ctime;
              PL_statcache.st_blksize = req->statdata->st_blksize;
              PL_statcache.st_blocks  = req->statdata->st_blocks;

              Safefree (req->statdata);
            }

          PUSHMARK (SP);
          XPUSHs (sv_2mortal (newSViv (req->result)));
          PUTBACK;
          call_sv (req->callback, G_VOID);
          SPAGAIN;
          
          if (req->callback)
            SvREFCNT_dec (req->callback);

          errno = errorno;
          nreqs--;
          count++;
        }

      Safefree (req);
    }

  if (qs)
    send_reqs ();

  return count;
}

static sigset_t fullsigset;

#undef errno
#include <asm/unistd.h>

static int
aio_proc (void *thr_arg)
{
  aio_thread *thr = thr_arg;
  aio_req req;
  int errno;

  /* this is very much x86 and kernel-specific :(:(:( */
  /* we rely on gcc's ability to create closures. */
  _syscall3(int,read,int,fd,char *,buf,size_t,count)
  _syscall3(int,write,int,fd,char *,buf,size_t,count)

  _syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
  _syscall1(int,close,int,fd)

  _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
  _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)

  _syscall2(int,stat64, const char *, filename, struct stat64 *, buf)
  _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf)
  _syscall2(int,fstat64, int, fd, struct stat64 *, buf)

  sigprocmask (SIG_SETMASK, &fullsigset, 0);

  /* then loop */
  while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
    {
      req->thread = thr;
      errno = 0; /* strictly unnecessary */

      switch (req->type)
        {
          case REQ_READ:  req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
          case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
          case REQ_OPEN:  req->result = open    (req->dataptr, req->fd, req->mode); break;
          case REQ_CLOSE: req->result = close   (req->fd); break;
          case REQ_STAT:  req->result = stat64  (req->dataptr, req->statdata); break;
          case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break;
          case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break;

          case REQ_QUIT:
          default:
            write (respipe[1], (void *)&req, sizeof (req));
            return 0;
        }

      req->errorno = errno;
      write (respipe[1], (void *)&req, sizeof (req));
    }

  return 0;
}

MODULE = Linux::AIO                PACKAGE = Linux::AIO

BOOT:
{
        sigfillset (&fullsigset);
        sigdelset (&fullsigset, SIGTERM);
        sigdelset (&fullsigset, SIGQUIT);
        sigdelset (&fullsigset, SIGABRT);
        sigdelset (&fullsigset, SIGINT);

        if (pipe (reqpipe) || pipe (respipe))
          croak ("unable to initialize request or result pipe");

        if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
          croak ("cannot set result pipe to nonblocking mode");

        if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
          croak ("cannot set result pipe to nonblocking mode");
}

void
min_parallel(nthreads)
        int     nthreads
        PROTOTYPE: $
        CODE:
        while (nthreads > started)
          start_thread ();

void
max_parallel(nthreads)
        int     nthreads
        PROTOTYPE: $
        CODE:
        int cur = started;
        while (cur > nthreads)
          {          
            end_thread ();
            cur--;
          }

        while (started > nthreads)
          {
            fd_set rfd;
            FD_ZERO(&rfd);
            FD_SET(respipe[0], &rfd);

            select (respipe[0] + 1, &rfd, 0, 0, 0);
            poll_cb (aTHX);
          }

void
aio_open(pathname,flags,mode,callback)
        SV *    pathname
        int     flags
        int     mode
        SV *    callback
        PROTOTYPE: $$$$
        CODE:
        aio_req req;

        Newz (0, req, 1, aio_cb);

        if (!req)
          croak ("out of memory during aio_req allocation");

        req->type = REQ_OPEN;
        req->data = newSVsv (pathname);
        req->dataptr = SvPV_nolen (req->data);
        req->fd = flags;
        req->mode = mode;
        req->callback = SvREFCNT_inc (callback);

        send_req (req);

void
aio_close(fh,callback)
        InputStream     fh
        SV *            callback
        PROTOTYPE: $$
        CODE:
        aio_req req;

        Newz (0, req, 1, aio_cb);

        if (!req)
          croak ("out of memory during aio_req allocation");

        req->type = REQ_CLOSE;
        req->fd = PerlIO_fileno (fh);
        req->callback = SvREFCNT_inc (callback);

        send_req (req);

void
aio_read(fh,offset,length,data,dataoffset,callback)
        InputStream     fh
        UV              offset
        IV              length
        SV *            data
        IV              dataoffset
        SV *            callback
        PROTOTYPE: $$$$$$
        CODE:
        read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);

void
aio_write(fh,offset,length,data,dataoffset,callback)
        OutputStream    fh
        UV              offset
        IV              length
        SV *            data
        IV              dataoffset
        SV *            callback
        PROTOTYPE: $$$$$$
        CODE:
        read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);

void
aio_stat(fh_or_path,callback)
        SV *            fh_or_path
        SV *            callback
        PROTOTYPE: $$
        ALIAS:
           aio_lstat = 1
        CODE:
        aio_req req;

        Newz (0, req, 1, aio_cb);

        if (!req)
          croak ("out of memory during aio_req allocation");

        New (0, req->statdata, 1, struct stat64);

        if (!req->statdata)
          croak ("out of memory during aio_req->statdata allocation");

        if (SvPOK (fh_or_path))
          {
            req->type = ix ? REQ_LSTAT : REQ_STAT;
            req->data = newSVsv (fh_or_path);
            req->dataptr = SvPV_nolen (req->data);
          }
        else
          {
            req->type = REQ_FSTAT;
            req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        req->callback = SvREFCNT_inc (callback);

        send_req (req);

int
poll_fileno()
        PROTOTYPE:
        CODE:
        RETVAL = respipe[0];
        OUTPUT:
        RETVAL

int
poll_cb(...)
        PROTOTYPE:
        CODE:
        RETVAL = poll_cb (aTHX);
        OUTPUT:
        RETVAL

int
nreqs()
        PROTOTYPE:
        CODE:
        RETVAL = nreqs;
        OUTPUT:
        RETVAL

Revision:	1.19
Committed:	Fri May 7 00:57:29 2004 UTC (20 years ago) by root
Branch:	MAIN
Changes since 1.18:	+0 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.17	#define PERL_NO_GET_CONTEXT
2
3	root	1.1	#include "EXTERN.h"
4			#include "perl.h"
5			#include "XSUB.h"
6
7			#include <sys/types.h>
8	root	1.13	#include <sys/stat.h>
9	root	1.1	#include <unistd.h>
10	root	1.5	#include <fcntl.h>
11	root	1.8	#include <signal.h>
12	root	1.1	#include <sched.h>
13
14	root	1.13	typedef void InputStream; / hack, but 5.6.1 is simply toooo old ;) */
15			typedef void OutputStream; / hack, but 5.6.1 is simply toooo old ;) */
16	root	1.12	typedef void InOutStream; / hack, but 5.6.1 is simply toooo old ;) */
17
18	root	1.16	#ifndef __NR_pread64
19			# define __NR_pread64 __NR_pread
20			#endif
21			#ifndef __NR_pwrite64
22			# define __NR_pwrite64 __NR_pwrite
23			#endif
24
25	root	1.8	#define STACKSIZE 1024 /* yeah */
26	root	1.1
27	root	1.13	enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT};
28	root	1.1
29			typedef struct {
30			char stack[STACKSIZE];
31			} aio_thread;
32
33	root	1.18	typedef struct aio_cb {
34			struct aio_cb *next;
35
36	root	1.1	int type;
37			aio_thread *thread;
38
39			int fd;
40			off_t offset;
41			size_t length;
42	root	1.2	ssize_t result;
43	root	1.8	mode_t mode; /* open */
44	root	1.1	int errorno;
45	root	1.5	SV data, callback;
46	root	1.1	void *dataptr;
47	root	1.2	STRLEN dataoffset;
48	root	1.13
49			struct stat64 *statdata;
50	root	1.1	} aio_cb;
51
52			typedef aio_cb *aio_req;
53
54			static int started;
55	root	1.5	static int nreqs;
56	root	1.1	static int reqpipe[2], respipe[2];
57
58	root	1.18	static aio_req qs, qe; /* queue start, queue end */
59
60	root	1.2	static int aio_proc(void *arg);
61
62	root	1.1	static void
63	root	1.18	start_thread (void)
64	root	1.1	{
65	root	1.2	aio_thread *thr;
66
67			New (0, thr, 1, aio_thread);
68
69			if (clone (aio_proc,
70			&(thr->stack[STACKSIZE]),
71			CLONE_VM\|CLONE_FS\|CLONE_FILES\|CLONE_SIGHAND,
72			thr) >= 0)
73			started++;
74			else
75			Safefree (thr);
76	root	1.1	}
77
78			static void
79	root	1.18	send_reqs (void)
80	root	1.1	{
81	root	1.18	/* this write is atomic */
82			while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
83			{
84			qs = qs->next;
85			if (!qs) qe = 0;
86			}
87	root	1.2	}
88
89			static void
90	root	1.8	send_req (aio_req req)
91			{
92			nreqs++;
93	root	1.18	req->next = 0;
94
95			if (qe)
96			qe->next = req;
97			else
98			qe = qs = req;
99
100			send_reqs ();
101			}
102
103			static void
104			end_thread (void)
105			{
106			aio_req req;
107			New (0, req, 1, aio_cb);
108			req->type = REQ_QUIT;
109
110			send_req (req);
111	root	1.8	}
112
113			static void
114	root	1.17	read_write (pTHX_
115			int dowrite, int fd, off_t offset, size_t length,
116	root	1.18	SV data, STRLEN dataoffset, SV callback)
117	root	1.2	{
118	root	1.5	aio_req req;
119			STRLEN svlen;
120			char *svptr = SvPV (data, svlen);
121
122	root	1.13	SvUPGRADE (data, SVt_PV);
123			SvPOK_on (data);
124
125	root	1.5	if (dataoffset < 0)
126			dataoffset += svlen;
127
128			if (dataoffset < 0 \|\| dataoffset > svlen)
129			croak ("data offset outside of string");
130
131			if (dowrite)
132			{
133			/* write: check length and adjust. */
134			if (length < 0 \|\| length + dataoffset > svlen)
135			length = svlen - dataoffset;
136			}
137			else
138			{
139			/* read: grow scalar as necessary */
140			svptr = SvGROW (data, length + dataoffset);
141			}
142
143			if (length < 0)
144			croak ("length must not be negative");
145
146	root	1.14	Newz (0, req, 1, aio_cb);
147	root	1.5
148			if (!req)
149			croak ("out of memory during aio_req allocation");
150
151			req->type = dowrite ? REQ_WRITE : REQ_READ;
152			req->fd = fd;
153			req->offset = offset;
154			req->length = length;
155			req->data = SvREFCNT_inc (data);
156	root	1.6	req->dataptr = (char *)svptr + dataoffset;
157	root	1.5	req->callback = SvREFCNT_inc (callback);
158
159	root	1.8	send_req (req);
160	root	1.5	}
161
162			static int
163			poll_cb (pTHX)
164			{
165			dSP;
166			int count = 0;
167			aio_req req;
168
169			while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
170			{
171			if (req->type == REQ_QUIT)
172			{
173			Safefree (req->thread);
174			started--;
175			}
176			else
177			{
178			int errorno = errno;
179			errno = req->errorno;
180
181			if (req->type == REQ_READ)
182	root	1.6	SvCUR_set (req->data, req->dataoffset
183			+ req->result > 0 ? req->result : 0);
184	root	1.5
185	root	1.14	if (req->data)
186			SvREFCNT_dec (req->data);
187
188	root	1.13	if (req->type == REQ_STAT \|\| req->type == REQ_LSTAT \|\| req->type == REQ_FSTAT)
189			{
190			PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
191			PL_laststatval = req->result;
192			PL_statcache.st_dev = req->statdata->st_dev;
193			PL_statcache.st_ino = req->statdata->st_ino;
194			PL_statcache.st_mode = req->statdata->st_mode;
195			PL_statcache.st_nlink = req->statdata->st_nlink;
196			PL_statcache.st_uid = req->statdata->st_uid;
197			PL_statcache.st_gid = req->statdata->st_gid;
198			PL_statcache.st_rdev = req->statdata->st_rdev;
199			PL_statcache.st_size = req->statdata->st_size;
200			PL_statcache.st_atime = req->statdata->st_atime;
201			PL_statcache.st_mtime = req->statdata->st_mtime;
202			PL_statcache.st_ctime = req->statdata->st_ctime;
203			PL_statcache.st_blksize = req->statdata->st_blksize;
204			PL_statcache.st_blocks = req->statdata->st_blocks;
205
206			Safefree (req->statdata);
207			}
208
209	root	1.5	PUSHMARK (SP);
210			XPUSHs (sv_2mortal (newSViv (req->result)));
211			PUTBACK;
212			call_sv (req->callback, G_VOID);
213			SPAGAIN;
214
215	root	1.14	if (req->callback)
216			SvREFCNT_dec (req->callback);
217	root	1.5
218			errno = errorno;
219			nreqs--;
220			count++;
221			}
222
223			Safefree (req);
224			}
225
226	root	1.18	if (qs)
227			send_reqs ();
228
229	root	1.5	return count;
230	root	1.2	}
231
232	root	1.8	static sigset_t fullsigset;
233
234	root	1.2	#undef errno
235			#include <asm/unistd.h>
236
237			static int
238	root	1.18	aio_proc (void *thr_arg)
239	root	1.2	{
240			aio_thread *thr = thr_arg;
241	root	1.9	aio_req req;
242	root	1.2	int errno;
243
244	root	1.15	/* this is very much x86 and kernel-specific :(:(:( */
245	root	1.11	/* we rely on gcc's ability to create closures. */
246	root	1.13	_syscall3(int,read,int,fd,char *,buf,size_t,count)
247			_syscall3(int,write,int,fd,char *,buf,size_t,count)
248
249	root	1.11	_syscall3(int,open,char *,pathname,int,flags,mode_t,mode)
250			_syscall1(int,close,int,fd)
251
252	root	1.16	_syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
253			_syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi)
254	root	1.13
255			_syscall2(int,stat64, const char , filename, struct stat64 , buf)
256			_syscall2(int,lstat64, const char , filename, struct stat64 , buf)
257			_syscall2(int,fstat64, int, fd, struct stat64 *, buf)
258
259	root	1.8	sigprocmask (SIG_SETMASK, &fullsigset, 0);
260	root	1.2
261			/* then loop */
262			while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
263			{
264			req->thread = thr;
265	root	1.14	errno = 0; /* strictly unnecessary */
266	root	1.2
267	root	1.18	switch (req->type)
268	root	1.2	{
269	root	1.18	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
270			case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break;
271			case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
272			case REQ_CLOSE: req->result = close (req->fd); break;
273			case REQ_STAT: req->result = stat64 (req->dataptr, req->statdata); break;
274			case REQ_LSTAT: req->result = lstat64 (req->dataptr, req->statdata); break;
275			case REQ_FSTAT: req->result = fstat64 (req->fd, req->statdata); break;
276
277			case REQ_QUIT:
278			default:
279			write (respipe[1], (void *)&req, sizeof (req));
280			return 0;
281	root	1.2	}
282
283	root	1.8	req->errorno = errno;
284	root	1.2	write (respipe[1], (void *)&req, sizeof (req));
285			}
286
287			return 0;
288	root	1.1	}
289
290			MODULE = Linux::AIO PACKAGE = Linux::AIO
291
292			BOOT:
293			{
294	root	1.8	sigfillset (&fullsigset);
295	root	1.9	sigdelset (&fullsigset, SIGTERM);
296			sigdelset (&fullsigset, SIGQUIT);
297			sigdelset (&fullsigset, SIGABRT);
298			sigdelset (&fullsigset, SIGINT);
299	root	1.8
300	root	1.1	if (pipe (reqpipe) \|\| pipe (respipe))
301			croak ("unable to initialize request or result pipe");
302	root	1.18
303			if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
304			croak ("cannot set result pipe to nonblocking mode");
305	root	1.5
306			if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
307			croak ("cannot set result pipe to nonblocking mode");
308	root	1.1	}
309
310			void
311			min_parallel(nthreads)
312			int nthreads
313	root	1.5	PROTOTYPE: $
314	root	1.1	CODE:
315			while (nthreads > started)
316			start_thread ();
317
318			void
319			max_parallel(nthreads)
320			int nthreads
321	root	1.5	PROTOTYPE: $
322	root	1.1	CODE:
323	root	1.5	int cur = started;
324			while (cur > nthreads)
325			{
326			end_thread ();
327			cur--;
328			}
329
330	root	1.1	while (started > nthreads)
331	root	1.5	{
332	root	1.14	fd_set rfd;
333			FD_ZERO(&rfd);
334			FD_SET(respipe[0], &rfd);
335
336			select (respipe[0] + 1, &rfd, 0, 0, 0);
337	root	1.17	poll_cb (aTHX);
338	root	1.5	}
339	root	1.1
340			void
341	root	1.8	aio_open(pathname,flags,mode,callback)
342	root	1.13	SV * pathname
343	root	1.8	int flags
344			int mode
345			SV * callback
346			PROTOTYPE: $$$$
347			CODE:
348			aio_req req;
349
350	root	1.14	Newz (0, req, 1, aio_cb);
351	root	1.8
352			if (!req)
353			croak ("out of memory during aio_req allocation");
354
355			req->type = REQ_OPEN;
356	root	1.14	req->data = newSVsv (pathname);
357			req->dataptr = SvPV_nolen (req->data);
358	root	1.8	req->fd = flags;
359			req->mode = mode;
360	root	1.10	req->callback = SvREFCNT_inc (callback);
361
362			send_req (req);
363
364			void
365			aio_close(fh,callback)
366	root	1.13	InputStream fh
367	root	1.10	SV * callback
368	root	1.14	PROTOTYPE: $$
369	root	1.10	CODE:
370			aio_req req;
371
372	root	1.14	Newz (0, req, 1, aio_cb);
373	root	1.10
374			if (!req)
375			croak ("out of memory during aio_req allocation");
376
377			req->type = REQ_CLOSE;
378			req->fd = PerlIO_fileno (fh);
379	root	1.13	req->callback = SvREFCNT_inc (callback);
380
381			send_req (req);
382
383			void
384			aio_read(fh,offset,length,data,dataoffset,callback)
385			InputStream fh
386			UV offset
387			IV length
388			SV * data
389			IV dataoffset
390			SV * callback
391			PROTOTYPE: $$$$$$
392			CODE:
393			read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
394
395			void
396			aio_write(fh,offset,length,data,dataoffset,callback)
397			OutputStream fh
398			UV offset
399			IV length
400			SV * data
401			IV dataoffset
402			SV * callback
403			PROTOTYPE: $$$$$$
404			CODE:
405			read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407			void
408			aio_stat(fh_or_path,callback)
409			SV * fh_or_path
410			SV * callback
411			PROTOTYPE: $$
412			ALIAS:
413			aio_lstat = 1
414			CODE:
415			aio_req req;
416
417	root	1.14	Newz (0, req, 1, aio_cb);
418	root	1.13
419			if (!req)
420			croak ("out of memory during aio_req allocation");
421
422			New (0, req->statdata, 1, struct stat64);
423
424			if (!req->statdata)
425			croak ("out of memory during aio_req->statdata allocation");
426
427			if (SvPOK (fh_or_path))
428			{
429			req->type = ix ? REQ_LSTAT : REQ_STAT;
430	root	1.14	req->data = newSVsv (fh_or_path);
431			req->dataptr = SvPV_nolen (req->data);
432	root	1.13	}
433			else
434			{
435			req->type = REQ_FSTAT;
436			req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
437			}
438
439	root	1.8	req->callback = SvREFCNT_inc (callback);
440
441			send_req (req);
442	root	1.5
443			int
444			poll_fileno()
445			PROTOTYPE:
446			CODE:
447			RETVAL = respipe[0];
448			OUTPUT:
449			RETVAL
450
451			int
452	root	1.6	poll_cb(...)
453	root	1.5	PROTOTYPE:
454			CODE:
455			RETVAL = poll_cb (aTHX);
456			OUTPUT:
457			RETVAL
458
459			int
460			nreqs()
461			PROTOTYPE:
462			CODE:
463			RETVAL = nreqs;
464			OUTPUT:
465			RETVAL
466