IO-AIO/AIO.xs

#include "libeio/xthread.h"

#include <errno.h>

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

#include <stddef.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <fcntl.h>
#include <sched.h>

/* perl namespace pollution */
#undef VERSION

#ifdef _WIN32

# define EIO_STRUCT_DIRENT Direntry_t
# undef malloc
# undef free

// perl overrides all those nice win32 functions
# undef open
# undef read
# undef write
# undef send
# undef recv
# undef stat
# undef fstat
# define lstat stat
# undef truncate
# undef ftruncate
# undef open
# undef close
# undef unlink
# undef rmdir
# undef rename
# undef lseek

# define chown(a,b,c)    (errno = ENOSYS, -1)
# define fchown(a,b,c)   (errno = ENOSYS, -1)
# define fchmod(a,b)     (errno = ENOSYS, -1)
# define symlink(a,b)    (errno = ENOSYS, -1)
# define readlink(a,b,c) (errno = ENOSYS, -1)
# define mknod(a,b,c)    (errno = ENOSYS, -1)
# define truncate(a,b)   (errno = ENOSYS, -1)
# define ftruncate(fd,o) chsize ((fd), (o))
# define fsync(fd)       _commit (fd)
# define opendir(fd)     (errno = ENOSYS, 0)
# define readdir(fd)     (errno = ENOSYS, -1)
# define closedir(fd)    (errno = ENOSYS, -1)
# define mkdir(a,b)      mkdir (a)

#else

# include <sys/time.h>
# include <sys/select.h>
# include <unistd.h>
# include <utime.h>
# include <signal.h>
# define EIO_STRUCT_DIRENT struct dirent

#endif

#define EIO_STRUCT_STAT Stat_t

/* use NV for 32 bit perls as it allows larger offsets */
#if IVSIZE >= 8
# define SvVAL64 SvIV
#else
# define SvVAL64 SvNV
#endif

static HV *stash;
typedef SV SV8; /* byte-sv, used for argument-checking */

#define AIO_REQ_KLASS "IO::AIO::REQ"
#define AIO_GRP_KLASS "IO::AIO::GRP"

#define EIO_REQ_MEMBERS \
  SV *callback;         \
  SV *sv1, *sv2;        \
  STRLEN stroffset;     \
  SV *self;

#define EIO_NO_WRAPPERS 1

#include "libeio/eio.h"

static int req_invoke    (eio_req *req);
#define EIO_FINISH(req)  req_invoke (req)
static void aio_grp_feed (eio_req *grp);
#define EIO_FEED(req)    aio_grp_feed (req)
static void req_destroy  (eio_req *grp);
#define EIO_DESTROY(req) req_destroy (req)

enum {
  FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
};

#include "libeio/eio.c"

typedef eio_req *aio_req;
typedef eio_req *aio_req_ornot;

static SV *on_next_submit;
static int next_pri = EIO_PRI_DEFAULT;
static int max_outstanding;

static int respipe_osf [2], respipe [2] = { -1, -1 };

static void req_destroy (aio_req req);
static void req_cancel (aio_req req);

static void want_poll (void)
{
  /* write a dummy byte to the pipe so fh becomes ready */
  respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
}

static void done_poll (void)
{
  /* read any signals sent by the worker threads */
  char buf [4];
  while (respipe_read (respipe [0], buf, 4) == 4)
    ;
}

/* must be called at most once */
static SV *req_sv (aio_req req, const char *klass)
{
  if (!req->self)
    {
      req->self = (SV *)newHV ();
      sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
    }

  return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
}

static aio_req SvAIO_REQ (SV *sv)
{
  MAGIC *mg;

  if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
    croak ("object of class " AIO_REQ_KLASS " expected");

  mg = mg_find (SvRV (sv), PERL_MAGIC_ext);

  return mg ? (aio_req)mg->mg_ptr : 0;
}

static void aio_grp_feed (aio_req grp)
{
  if (grp->sv2 && SvOK (grp->sv2))
    {
      dSP;

      ENTER;
      SAVETMPS;
      PUSHMARK (SP);
      XPUSHs (req_sv (grp, AIO_GRP_KLASS));
      PUTBACK;
      call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
      SPAGAIN;
      FREETMPS;
      LEAVE;
    }
}

static void req_submit (eio_req *req)
{
  eio_submit (req);

  if (on_next_submit)
    {
      dSP;
      SV *cb = sv_2mortal (on_next_submit);

      on_next_submit = 0;

      PUSHMARK (SP);
      PUTBACK;
      call_sv (cb, G_DISCARD | G_EVAL);
    }
}

static int req_invoke (eio_req *req)
{
  dSP;

  if (req->flags & FLAG_SV2_RO_OFF)
    SvREADONLY_off (req->sv2);

  if (!EIO_CANCELLED (req) && SvOK (req->callback))
    {
      ENTER;
      SAVETMPS;
      PUSHMARK (SP);
      EXTEND (SP, 1);

      switch (req->type)
        {
          case EIO_READDIR:
            {
              SV *rv = &PL_sv_undef;

              if (req->result >= 0)
                {
                  int i;
                  char *buf = req->ptr2;
                  AV *av = newAV ();

                  av_extend (av, req->result - 1);

                  for (i = 0; i < req->result; ++i)
                    {
                      SV *sv = newSVpv (buf, 0);

                      av_store (av, i, sv);
                      buf += SvCUR (sv) + 1;
                    }

                  rv = sv_2mortal (newRV_noinc ((SV *)av));
                }

              PUSHs (rv);
            }
            break;

          case EIO_OPEN:
            {
              /* convert fd to fh */
              SV *fh = &PL_sv_undef;

              if (req->result >= 0)
                {
                  GV *gv = (GV *)sv_newmortal ();
                  int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
                  char sym [64];
                  int symlen;
                  
                  symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
                  gv_init (gv, stash, sym, symlen, 0);

                  symlen = snprintf (
                     sym,
                     sizeof (sym),
                     "%s&=%d",
                     flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
                     req->result
                  );

                  if (do_open (gv, sym, symlen, 0, 0, 0, 0))
                    fh = (SV *)gv;
                }

              PUSHs (fh);
            }
            break;

          case EIO_GROUP:
            req->int1 = 2; /* mark group as finished */

            if (req->sv1)
              {
                int i;
                AV *av = (AV *)req->sv1;

                EXTEND (SP, AvFILL (av) + 1);
                for (i = 0; i <= AvFILL (av); ++i)
                  PUSHs (*av_fetch (av, i, 0));
              }
            break;

          case EIO_NOP:
          case EIO_BUSY:
            break;

          case EIO_READLINK:
            if (req->result > 0)
              PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
            break;

          case EIO_STAT:
          case EIO_LSTAT:
          case EIO_FSTAT:
            PL_laststype   = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
            PL_laststatval = req->result;
            PL_statcache   = *(EIO_STRUCT_STAT *)(req->ptr2);
            PUSHs (sv_2mortal (newSViv (req->result)));
            break;

          case EIO_READ:
            SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
            *SvEND (req->sv2) = 0;
            PUSHs (sv_2mortal (newSViv (req->result)));
            break;

          case EIO_DUP2:
            if (req->result > 0)
              req->result = 0;
            /* FALLTHROUGH */

          default:
            PUSHs (sv_2mortal (newSViv (req->result)));
            break;
        }

      errno = req->errorno;

      PUTBACK;
      call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
      SPAGAIN;

      FREETMPS;
      LEAVE;

      PUTBACK;
    }

  return !!SvTRUE (ERRSV);
}

static void req_destroy (aio_req req)
{
  if (req->self)
    {
      sv_unmagic (req->self, PERL_MAGIC_ext);
      SvREFCNT_dec (req->self);
    }

  SvREFCNT_dec (req->sv1);
  SvREFCNT_dec (req->sv2);
  SvREFCNT_dec (req->callback);

  Safefree (req);
}

static void req_cancel_subs (aio_req grp)
{
  aio_req sub;

  if (grp->type != EIO_GROUP)
    return;

  SvREFCNT_dec (grp->sv2);
  grp->sv2 = 0;

  eio_grp_cancel (grp);
}

#ifdef USE_SOCKETS_AS_HANDLES
# define TO_SOCKET(x) (win32_get_osfhandle (x))
#else
# define TO_SOCKET(x) (x)
#endif

static void
create_respipe (void)
{
  int old_readfd = respipe [0];

  if (respipe [1] >= 0)
    respipe_close (TO_SOCKET (respipe [1]));

#ifdef _WIN32
  if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
#else
  if (pipe (respipe))
#endif
    croak ("unable to initialize result pipe");

  if (old_readfd >= 0)
    {
      if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
        croak ("unable to initialize result pipe(2)");

      respipe_close (respipe [0]);
      respipe [0] = old_readfd;
    }

#ifdef _WIN32
  int arg = 1;
  if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
      || ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
#else
  if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
      || fcntl (respipe [1], F_SETFL, O_NONBLOCK))
#endif
    croak ("unable to initialize result pipe(3)");

  respipe_osf [0] = TO_SOCKET (respipe [0]);
  respipe_osf [1] = TO_SOCKET (respipe [1]);
}

static void poll_wait (void)
{
  fd_set rfd;

  while (eio_nreqs ())
    {
      int size;

      X_LOCK   (reslock);
      size = res_queue.size;
      X_UNLOCK (reslock);

      if (size)
        return;

      maybe_start_thread ();

      FD_ZERO (&rfd);
      FD_SET (respipe [0], &rfd);

      PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
    }
}

static int poll_cb (void)
{
  int res;

  do 
    {
      res = eio_poll ();

      if (res > 0)
        croak (0);
    }
  while (max_outstanding && max_outstanding <= eio_nreqs ());

  return res;
}

static void atfork_child (void)
{
  create_respipe ();
}

#define dREQ                                                    \
  aio_req req;                                                  \
  int req_pri = next_pri;                                       \
  next_pri = EIO_PRI_DEFAULT;                                   \
                                                                \
  if (SvOK (callback) && !SvROK (callback))                     \
    croak ("callback must be undef or of reference type");      \
                                                                \
  Newz (0, req, 1, eio_req);                                    \
  if (!req)                                                     \
    croak ("out of memory during eio_req allocation");          \
                                                                \
  req->callback = newSVsv (callback);                           \
  req->pri = req_pri

#define REQ_SEND                                                \
  req_submit (req);                                             \
                                                                \
  if (GIMME_V != G_VOID)                                        \
    XPUSHs (req_sv (req, AIO_REQ_KLASS));
        
MODULE = IO::AIO                PACKAGE = IO::AIO

PROTOTYPES: ENABLE

BOOT:
{
        stash = gv_stashpv ("IO::AIO", 1);

        newCONSTSUB (stash, "EXDEV",    newSViv (EXDEV));
        newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
        newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
        newCONSTSUB (stash, "O_CREAT",  newSViv (O_CREAT));
        newCONSTSUB (stash, "O_TRUNC",  newSViv (O_TRUNC));
#ifndef _WIN32
        newCONSTSUB (stash, "S_IFIFO",  newSViv (S_IFIFO));
#endif

        create_respipe ();

        if (eio_init (want_poll, done_poll) < 0)
          croak ("IO::AIO: unable to initialise eio library");

        /* atfork child called in fifo order, so before eio's handler */
        X_THREAD_ATFORK (0, 0, atfork_child);
}

void
max_poll_reqs (int nreqs)
        PROTOTYPE: $
        CODE:
        eio_set_max_poll_reqs (nreqs);

void
max_poll_time (double nseconds)
        PROTOTYPE: $
        CODE:
        eio_set_max_poll_time (nseconds);

void
min_parallel (int nthreads)
        PROTOTYPE: $
        CODE:
        eio_set_min_parallel (nthreads);

void
max_parallel (int nthreads)
        PROTOTYPE: $
        CODE:
        eio_set_max_parallel (nthreads);

void
max_idle (int nthreads)
        PROTOTYPE: $
        CODE:
        eio_set_max_idle (nthreads);

void
max_outstanding (int maxreqs)
        PROTOTYPE: $
        CODE:
        max_outstanding = maxreqs;

void
aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
        PROTOTYPE: $$$;$
        PPCODE:
{
        dREQ;

        req->type = EIO_OPEN;
        req->sv1  = newSVsv (pathname);
        req->ptr1 = SvPVbyte_nolen (req->sv1);
        req->int1 = flags;
        req->int2 = mode;

        REQ_SEND;
}

void
aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
        PROTOTYPE: $;$
        ALIAS:
           aio_fsync     = EIO_FSYNC
           aio_fdatasync = EIO_FDATASYNC
        PPCODE:
{
        dREQ;

        req->type = ix;
        req->sv1  = newSVsv (fh);
        req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));

        REQ_SEND (req);
}

void
aio_close (SV *fh, SV *callback=&PL_sv_undef)
        PROTOTYPE: $;$
        PPCODE:
{
        static int close_pipe = -1; /* dummy fd to close fds via dup2 */
        dREQ;

        if (close_pipe < 0)
          {
            int pipefd [2];

            if (pipe (pipefd) < 0
                || close (pipefd [1]) < 0
                || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
              abort (); /*D*/

            close_pipe = pipefd [0];
          }

        req->type = EIO_DUP2;
        req->int1 = close_pipe;
        req->sv2  = newSVsv (fh);
        req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));

        REQ_SEND (req);
}

void
aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
        ALIAS:
           aio_read  = EIO_READ
           aio_write = EIO_WRITE
        PROTOTYPE: $$$$$;$
        PPCODE:
{
        STRLEN svlen;
        char *svptr = SvPVbyte (data, svlen);
        UV len = SvUV (length);

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

        if (dataoffset < 0)
          dataoffset += svlen;

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

        if (ix == EIO_WRITE)
          {
            /* write: check length and adjust. */
            if (!SvOK (length) || len + dataoffset > svlen)
              len = svlen - dataoffset;
          }
        else
          {
            /* read: grow scalar as necessary */
            svptr = SvGROW (data, len + dataoffset + 1);
          }

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

        {
          dREQ;

          req->type = ix;
          req->sv1  = newSVsv (fh);
          req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
                                                    : IoOFP (sv_2io (fh)));
          req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
          req->size = len;
          req->sv2  = SvREFCNT_inc (data);
          req->ptr2 = (char *)svptr + dataoffset;
          req->stroffset = dataoffset;

          if (!SvREADONLY (data))
            {
              SvREADONLY_on (data);
              req->flags |= FLAG_SV2_RO_OFF;
            }

          REQ_SEND;
        }
}

void
aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
        PROTOTYPE: $$;$
        PPCODE:
{
        SV *data;
        dREQ;

        req->type = EIO_READLINK;
        req->sv1  = newSVsv (path);
        req->ptr1 = SvPVbyte_nolen (req->sv1);

        REQ_SEND;
}

void
aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
        PROTOTYPE: $$$$;$
        PPCODE:
{
        dREQ;

        req->type = EIO_SENDFILE;
        req->sv1  = newSVsv (out_fh);
        req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
        req->sv2  = newSVsv (in_fh);
        req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
        req->offs = SvVAL64 (in_offset);
        req->size = length;

        REQ_SEND;
}

void
aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
        PROTOTYPE: $$$;$
        PPCODE:
{
        dREQ;

        req->type = EIO_READAHEAD;
        req->sv1  = newSVsv (fh);
        req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
        req->offs = SvVAL64 (offset);
        req->size = length;

        REQ_SEND;
}

void
aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
        ALIAS:
           aio_stat  = EIO_STAT
           aio_lstat = EIO_LSTAT
        PPCODE:
{
        dREQ;

        req->sv1 = newSVsv (fh_or_path);

        if (SvPOK (req->sv1))
          {
            req->type = ix;
            req->ptr1 = SvPVbyte_nolen (req->sv1);
          }
        else
          {
            req->type = EIO_FSTAT;
            req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        REQ_SEND;
}

void
aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
        PPCODE:
{
        dREQ;

        req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
        req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
        req->sv1 = newSVsv (fh_or_path);

        if (SvPOK (req->sv1))
          {
            req->type = EIO_UTIME;
            req->ptr1 = SvPVbyte_nolen (req->sv1);
          }
        else
          {
            req->type = EIO_FUTIME;
            req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        REQ_SEND;
}

void
aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
        PPCODE:
{
        dREQ;

        req->sv1  = newSVsv (fh_or_path);
        req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;

        if (SvPOK (req->sv1))
          {
            req->type = EIO_TRUNCATE;
            req->ptr1 = SvPVbyte_nolen (req->sv1);
          }
        else
          {
            req->type = EIO_FTRUNCATE;
            req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        REQ_SEND;
}

void
aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
        ALIAS:
        aio_chmod  = EIO_CHMOD
        aio_mkdir  = EIO_MKDIR
        PPCODE:
{
        dREQ;

        req->int2 = mode;
        req->sv1  = newSVsv (fh_or_path);

        if (SvPOK (req->sv1))
          {
            req->type = ix;
            req->ptr1 = SvPVbyte_nolen (req->sv1);
          }
        else
          {
            req->type = EIO_FCHMOD;
            req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        REQ_SEND;
}

void
aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
        PPCODE:
{
        dREQ;

        req->int2 = SvOK (uid) ? SvIV (uid) : -1;
        req->int3 = SvOK (gid) ? SvIV (gid) : -1;
        req->sv1  = newSVsv (fh_or_path);

        if (SvPOK (req->sv1))
          {
            req->type = EIO_CHOWN;
            req->ptr1 = SvPVbyte_nolen (req->sv1);
          }
        else
          {
            req->type = EIO_FCHOWN;
            req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
          }

        REQ_SEND;
}

void
aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
        ALIAS:
           aio_unlink  = EIO_UNLINK
           aio_rmdir   = EIO_RMDIR
           aio_readdir = EIO_READDIR
        PPCODE:
{
        dREQ;
        
        req->type = ix;
        req->sv1  = newSVsv (pathname);
        req->ptr1 = SvPVbyte_nolen (req->sv1);

        REQ_SEND;
}

void
aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
        ALIAS:
           aio_link    = EIO_LINK
           aio_symlink = EIO_SYMLINK
           aio_rename  = EIO_RENAME
        PPCODE:
{
        dREQ;
        
        req->type = ix;
        req->sv1  = newSVsv (oldpath);
        req->ptr1 = SvPVbyte_nolen (req->sv1);
        req->sv2  = newSVsv (newpath);
        req->ptr2 = SvPVbyte_nolen (req->sv2);
        
        REQ_SEND;
}

void
aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
        PPCODE:
{
        dREQ;
        
        req->type = EIO_MKNOD;
        req->sv1  = newSVsv (pathname);
        req->ptr1 = SvPVbyte_nolen (req->sv1);
        req->int2 = (mode_t)mode;
        req->offs = dev;
        
        REQ_SEND;
}

void
aio_busy (double delay, SV *callback=&PL_sv_undef)
        PPCODE:
{
        dREQ;

        req->type = EIO_BUSY;
        req->nv1  = delay < 0. ? 0. : delay;

        REQ_SEND;
}

void
aio_group (SV *callback=&PL_sv_undef)
        PROTOTYPE: ;$
        PPCODE:
{
        dREQ;

        req->type = EIO_GROUP;

        eio_submit (req);
        XPUSHs (req_sv (req, AIO_GRP_KLASS));
}

void
aio_nop (SV *callback=&PL_sv_undef)
        ALIAS:
           aio_nop  = EIO_NOP
           aio_sync = EIO_SYNC
        PPCODE:
{
        dREQ;

        req->type = ix;

        REQ_SEND;
}

int
aioreq_pri (int pri = 0)
        PROTOTYPE: ;$
        CODE:
        RETVAL = next_pri;
        if (items > 0)
          {
            if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
            if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
            next_pri = pri;
          }
        OUTPUT:
        RETVAL

void
aioreq_nice (int nice = 0)
        CODE:
        nice = next_pri - nice;
        if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
        if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
        next_pri = nice;

void
flush ()
        PROTOTYPE:
        CODE:
        while (eio_nreqs ())
          {
            poll_wait ();
            poll_cb ();
          }

int
poll()
        PROTOTYPE:
        CODE:
        poll_wait ();
        RETVAL = poll_cb ();
        OUTPUT:
        RETVAL

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

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

void
poll_wait()
        PROTOTYPE:
        CODE:
        poll_wait ();

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

int
nready()
        PROTOTYPE:
        CODE:
        RETVAL = eio_nready ();
        OUTPUT:
        RETVAL

int
npending()
        PROTOTYPE:
        CODE:
        RETVAL = eio_npending ();
        OUTPUT:
        RETVAL

int
nthreads()
        PROTOTYPE:
        CODE:
        RETVAL = eio_nthreads ();
        OUTPUT:
        RETVAL

void _on_next_submit (SV *cb)
        CODE:
        SvREFCNT_dec (on_next_submit);
        on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;

PROTOTYPES: DISABLE

MODULE = IO::AIO                PACKAGE = IO::AIO::REQ

void
cancel (aio_req_ornot req)
        CODE:
        eio_cancel (req);

void
cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
        CODE:
        SvREFCNT_dec (req->callback);
        req->callback = newSVsv (callback);

MODULE = IO::AIO                PACKAGE = IO::AIO::GRP

void
add (aio_req grp, ...)
        PPCODE:
{
        int i;

        if (grp->int1 == 2)
          croak ("cannot add requests to IO::AIO::GRP after the group finished");

        for (i = 1; i < items; ++i )
          {
            aio_req req;

            if (GIMME_V != G_VOID)
              XPUSHs (sv_2mortal (newSVsv (ST (i))));

            req = SvAIO_REQ (ST (i));

            if (req)
              eio_grp_add (grp, req);
          }
}

void
cancel_subs (aio_req_ornot req)
        CODE:
        req_cancel_subs (req);

void
result (aio_req grp, ...)
        CODE:
{
        int i;
        AV *av;

        grp->errorno = errno;

        av = newAV ();

        for (i = 1; i < items; ++i )
          av_push (av, newSVsv (ST (i)));

        SvREFCNT_dec (grp->sv1);
        grp->sv1 = (SV *)av;
}

void
errno (aio_req grp, int errorno = errno)
        CODE:
        grp->errorno = errorno;

void
limit (aio_req grp, int limit)
        CODE:
        eio_grp_limit (grp, limit);

void
feed (aio_req grp, SV *callback=&PL_sv_undef)
        CODE:
{
        SvREFCNT_dec (grp->sv2);
        grp->sv2 = newSVsv (callback);

        if (grp->int2 <= 0)
          grp->int2 = 2;

        eio_grp_limit (grp, grp->int2);
}

Revision:	1.122
Committed:	Tue May 13 19:35:16 2008 UTC (16 years ago) by root
Branch:	MAIN
Changes since 1.121:	+4 -13 lines
Log Message:	* empty log message *
#	Content
1	#include "libeio/xthread.h"
2
3	#include <errno.h>
4
5	#include "EXTERN.h"
6	#include "perl.h"
7	#include "XSUB.h"
8
9	#include <stddef.h>
10	#include <stdlib.h>
11	#include <errno.h>
12	#include <sys/types.h>
13	#include <sys/stat.h>
14	#include <limits.h>
15	#include <fcntl.h>
16	#include <sched.h>
17
18	/* perl namespace pollution */
19	#undef VERSION
20
21	#ifdef _WIN32
22
23	# define EIO_STRUCT_DIRENT Direntry_t
24	# undef malloc
25	# undef free
26
27	// perl overrides all those nice win32 functions
28	# undef open
29	# undef read
30	# undef write
31	# undef send
32	# undef recv
33	# undef stat
34	# undef fstat
35	# define lstat stat
36	# undef truncate
37	# undef ftruncate
38	# undef open
39	# undef close
40	# undef unlink
41	# undef rmdir
42	# undef rename
43	# undef lseek
44
45	# define chown(a,b,c) (errno = ENOSYS, -1)
46	# define fchown(a,b,c) (errno = ENOSYS, -1)
47	# define fchmod(a,b) (errno = ENOSYS, -1)
48	# define symlink(a,b) (errno = ENOSYS, -1)
49	# define readlink(a,b,c) (errno = ENOSYS, -1)
50	# define mknod(a,b,c) (errno = ENOSYS, -1)
51	# define truncate(a,b) (errno = ENOSYS, -1)
52	# define ftruncate(fd,o) chsize ((fd), (o))
53	# define fsync(fd) _commit (fd)
54	# define opendir(fd) (errno = ENOSYS, 0)
55	# define readdir(fd) (errno = ENOSYS, -1)
56	# define closedir(fd) (errno = ENOSYS, -1)
57	# define mkdir(a,b) mkdir (a)
58
59	#else
60
61	# include <sys/time.h>
62	# include <sys/select.h>
63	# include <unistd.h>
64	# include <utime.h>
65	# include <signal.h>
66	# define EIO_STRUCT_DIRENT struct dirent
67
68	#endif
69
70	#define EIO_STRUCT_STAT Stat_t
71
72	/* use NV for 32 bit perls as it allows larger offsets */
73	#if IVSIZE >= 8
74	# define SvVAL64 SvIV
75	#else
76	# define SvVAL64 SvNV
77	#endif
78
79	static HV *stash;
80	typedef SV SV8; /* byte-sv, used for argument-checking */
81
82	#define AIO_REQ_KLASS "IO::AIO::REQ"
83	#define AIO_GRP_KLASS "IO::AIO::GRP"
84
85	#define EIO_REQ_MEMBERS \
86	SV *callback; \
87	SV sv1, sv2; \
88	STRLEN stroffset; \
89	SV *self;
90
91	#define EIO_NO_WRAPPERS 1
92
93	#include "libeio/eio.h"
94
95	static int req_invoke (eio_req *req);
96	#define EIO_FINISH(req) req_invoke (req)
97	static void aio_grp_feed (eio_req *grp);
98	#define EIO_FEED(req) aio_grp_feed (req)
99	static void req_destroy (eio_req *grp);
100	#define EIO_DESTROY(req) req_destroy (req)
101
102	enum {
103	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
104	};
105
106	#include "libeio/eio.c"
107
108	typedef eio_req *aio_req;
109	typedef eio_req *aio_req_ornot;
110
111	static SV *on_next_submit;
112	static int next_pri = EIO_PRI_DEFAULT;
113	static int max_outstanding;
114
115	static int respipe_osf [2], respipe [2] = { -1, -1 };
116
117	static void req_destroy (aio_req req);
118	static void req_cancel (aio_req req);
119
120	static void want_poll (void)
121	{
122	/* write a dummy byte to the pipe so fh becomes ready */
123	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
124	}
125
126	static void done_poll (void)
127	{
128	/* read any signals sent by the worker threads */
129	char buf [4];
130	while (respipe_read (respipe [0], buf, 4) == 4)
131	;
132	}
133
134	/* must be called at most once */
135	static SV req_sv (aio_req req, const char klass)
136	{
137	if (!req->self)
138	{
139	req->self = (SV *)newHV ();
140	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
141	}
142
143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
144	}
145
146	static aio_req SvAIO_REQ (SV *sv)
147	{
148	MAGIC *mg;
149
150	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
151	croak ("object of class " AIO_REQ_KLASS " expected");
152
153	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
154
155	return mg ? (aio_req)mg->mg_ptr : 0;
156	}
157
158	static void aio_grp_feed (aio_req grp)
159	{
160	if (grp->sv2 && SvOK (grp->sv2))
161	{
162	dSP;
163
164	ENTER;
165	SAVETMPS;
166	PUSHMARK (SP);
167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
168	PUTBACK;
169	call_sv (grp->sv2, G_VOID \| G_EVAL \| G_KEEPERR);
170	SPAGAIN;
171	FREETMPS;
172	LEAVE;
173	}
174	}
175
176	static void req_submit (eio_req *req)
177	{
178	eio_submit (req);
179
180	if (on_next_submit)
181	{
182	dSP;
183	SV *cb = sv_2mortal (on_next_submit);
184
185	on_next_submit = 0;
186
187	PUSHMARK (SP);
188	PUTBACK;
189	call_sv (cb, G_DISCARD \| G_EVAL);
190	}
191	}
192
193	static int req_invoke (eio_req *req)
194	{
195	dSP;
196
197	if (req->flags & FLAG_SV2_RO_OFF)
198	SvREADONLY_off (req->sv2);
199
200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
201	{
202	ENTER;
203	SAVETMPS;
204	PUSHMARK (SP);
205	EXTEND (SP, 1);
206
207	switch (req->type)
208	{
209	case EIO_READDIR:
210	{
211	SV *rv = &PL_sv_undef;
212
213	if (req->result >= 0)
214	{
215	int i;
216	char *buf = req->ptr2;
217	AV *av = newAV ();
218
219	av_extend (av, req->result - 1);
220
221	for (i = 0; i < req->result; ++i)
222	{
223	SV *sv = newSVpv (buf, 0);
224
225	av_store (av, i, sv);
226	buf += SvCUR (sv) + 1;
227	}
228
229	rv = sv_2mortal (newRV_noinc ((SV *)av));
230	}
231
232	PUSHs (rv);
233	}
234	break;
235
236	case EIO_OPEN:
237	{
238	/* convert fd to fh */
239	SV *fh = &PL_sv_undef;
240
241	if (req->result >= 0)
242	{
243	GV gv = (GV )sv_newmortal ();
244	int flags = req->int1 & (O_RDONLY \| O_WRONLY \| O_RDWR);
245	char sym [64];
246	int symlen;
247
248	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
249	gv_init (gv, stash, sym, symlen, 0);
250
251	symlen = snprintf (
252	sym,
253	sizeof (sym),
254	"%s&=%d",
255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
256	req->result
257	);
258
259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
260	fh = (SV *)gv;
261	}
262
263	PUSHs (fh);
264	}
265	break;
266
267	case EIO_GROUP:
268	req->int1 = 2; /* mark group as finished */
269
270	if (req->sv1)
271	{
272	int i;
273	AV av = (AV )req->sv1;
274
275	EXTEND (SP, AvFILL (av) + 1);
276	for (i = 0; i <= AvFILL (av); ++i)
277	PUSHs (*av_fetch (av, i, 0));
278	}
279	break;
280
281	case EIO_NOP:
282	case EIO_BUSY:
283	break;
284
285	case EIO_READLINK:
286	if (req->result > 0)
287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
288	break;
289
290	case EIO_STAT:
291	case EIO_LSTAT:
292	case EIO_FSTAT:
293	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
294	PL_laststatval = req->result;
295	PL_statcache = (EIO_STRUCT_STAT )(req->ptr2);
296	PUSHs (sv_2mortal (newSViv (req->result)));
297	break;
298
299	case EIO_READ:
300	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
301	*SvEND (req->sv2) = 0;
302	PUSHs (sv_2mortal (newSViv (req->result)));
303	break;
304
305	case EIO_DUP2:
306	if (req->result > 0)
307	req->result = 0;
308	/* FALLTHROUGH */
309
310	default:
311	PUSHs (sv_2mortal (newSViv (req->result)));
312	break;
313	}
314
315	errno = req->errorno;
316
317	PUTBACK;
318	call_sv (req->callback, G_VOID \| G_EVAL \| G_DISCARD);
319	SPAGAIN;
320
321	FREETMPS;
322	LEAVE;
323
324	PUTBACK;
325	}
326
327	return !!SvTRUE (ERRSV);
328	}
329
330	static void req_destroy (aio_req req)
331	{
332	if (req->self)
333	{
334	sv_unmagic (req->self, PERL_MAGIC_ext);
335	SvREFCNT_dec (req->self);
336	}
337
338	SvREFCNT_dec (req->sv1);
339	SvREFCNT_dec (req->sv2);
340	SvREFCNT_dec (req->callback);
341
342	Safefree (req);
343	}
344
345	static void req_cancel_subs (aio_req grp)
346	{
347	aio_req sub;
348
349	if (grp->type != EIO_GROUP)
350	return;
351
352	SvREFCNT_dec (grp->sv2);
353	grp->sv2 = 0;
354
355	eio_grp_cancel (grp);
356	}
357
358	#ifdef USE_SOCKETS_AS_HANDLES
359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
360	#else
361	# define TO_SOCKET(x) (x)
362	#endif
363
364	static void
365	create_respipe (void)
366	{
367	int old_readfd = respipe [0];
368
369	if (respipe [1] >= 0)
370	respipe_close (TO_SOCKET (respipe [1]));
371
372	#ifdef _WIN32
373	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
374	#else
375	if (pipe (respipe))
376	#endif
377	croak ("unable to initialize result pipe");
378
379	if (old_readfd >= 0)
380	{
381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
382	croak ("unable to initialize result pipe(2)");
383
384	respipe_close (respipe [0]);
385	respipe [0] = old_readfd;
386	}
387
388	#ifdef _WIN32
389	int arg = 1;
390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
391	\|\| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
392	#else
393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
394	\|\| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
395	#endif
396	croak ("unable to initialize result pipe(3)");
397
398	respipe_osf [0] = TO_SOCKET (respipe [0]);
399	respipe_osf [1] = TO_SOCKET (respipe [1]);
400	}
401
402	static void poll_wait (void)
403	{
404	fd_set rfd;
405
406	while (eio_nreqs ())
407	{
408	int size;
409
410	X_LOCK (reslock);
411	size = res_queue.size;
412	X_UNLOCK (reslock);
413
414	if (size)
415	return;
416
417	maybe_start_thread ();
418
419	FD_ZERO (&rfd);
420	FD_SET (respipe [0], &rfd);
421
422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
423	}
424	}
425
426	static int poll_cb (void)
427	{
428	int res;
429
430	do
431	{
432	res = eio_poll ();
433
434	if (res > 0)
435	croak (0);
436	}
437	while (max_outstanding && max_outstanding <= eio_nreqs ());
438
439	return res;
440	}
441
442	static void atfork_child (void)
443	{
444	create_respipe ();
445	}
446
447	#define dREQ \
448	aio_req req; \
449	int req_pri = next_pri; \
450	next_pri = EIO_PRI_DEFAULT; \
451	\
452	if (SvOK (callback) && !SvROK (callback)) \
453	croak ("callback must be undef or of reference type"); \
454	\
455	Newz (0, req, 1, eio_req); \
456	if (!req) \
457	croak ("out of memory during eio_req allocation"); \
458	\
459	req->callback = newSVsv (callback); \
460	req->pri = req_pri
461
462	#define REQ_SEND \
463	req_submit (req); \
464	\
465	if (GIMME_V != G_VOID) \
466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
467
468	MODULE = IO::AIO PACKAGE = IO::AIO
469
470	PROTOTYPES: ENABLE
471
472	BOOT:
473	{
474	stash = gv_stashpv ("IO::AIO", 1);
475
476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
478	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
479	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
480	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
481	#ifndef _WIN32
482	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
483	#endif
484
485	create_respipe ();
486
487	if (eio_init (want_poll, done_poll) < 0)
488	croak ("IO::AIO: unable to initialise eio library");
489
490	/* atfork child called in fifo order, so before eio's handler */
491	X_THREAD_ATFORK (0, 0, atfork_child);
492	}
493
494	void
495	max_poll_reqs (int nreqs)
496	PROTOTYPE: $
497	CODE:
498	eio_set_max_poll_reqs (nreqs);
499
500	void
501	max_poll_time (double nseconds)
502	PROTOTYPE: $
503	CODE:
504	eio_set_max_poll_time (nseconds);
505
506	void
507	min_parallel (int nthreads)
508	PROTOTYPE: $
509	CODE:
510	eio_set_min_parallel (nthreads);
511
512	void
513	max_parallel (int nthreads)
514	PROTOTYPE: $
515	CODE:
516	eio_set_max_parallel (nthreads);
517
518	void
519	max_idle (int nthreads)
520	PROTOTYPE: $
521	CODE:
522	eio_set_max_idle (nthreads);
523
524	void
525	max_outstanding (int maxreqs)
526	PROTOTYPE: $
527	CODE:
528	max_outstanding = maxreqs;
529
530	void
531	aio_open (SV8 pathname, int flags, int mode, SV callback=&PL_sv_undef)
532	PROTOTYPE: $$$;$
533	PPCODE:
534	{
535	dREQ;
536
537	req->type = EIO_OPEN;
538	req->sv1 = newSVsv (pathname);
539	req->ptr1 = SvPVbyte_nolen (req->sv1);
540	req->int1 = flags;
541	req->int2 = mode;
542
543	REQ_SEND;
544	}
545
546	void
547	aio_fsync (SV fh, SV callback=&PL_sv_undef)
548	PROTOTYPE: $;$
549	ALIAS:
550	aio_fsync = EIO_FSYNC
551	aio_fdatasync = EIO_FDATASYNC
552	PPCODE:
553	{
554	dREQ;
555
556	req->type = ix;
557	req->sv1 = newSVsv (fh);
558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
559
560	REQ_SEND (req);
561	}
562
563	void
564	aio_close (SV fh, SV callback=&PL_sv_undef)
565	PROTOTYPE: $;$
566	PPCODE:
567	{
568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
569	dREQ;
570
571	if (close_pipe < 0)
572	{
573	int pipefd [2];
574
575	if (pipe (pipefd) < 0
576	\|\| close (pipefd [1]) < 0
577	\|\| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
578	abort (); /D/
579
580	close_pipe = pipefd [0];
581	}
582
583	req->type = EIO_DUP2;
584	req->int1 = close_pipe;
585	req->sv2 = newSVsv (fh);
586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
587
588	REQ_SEND (req);
589	}
590
591	void
592	aio_read (SV fh, SV offset, SV length, SV8 data, IV dataoffset, SV *callback=&PL_sv_undef)
593	ALIAS:
594	aio_read = EIO_READ
595	aio_write = EIO_WRITE
596	PROTOTYPE: $$$$$;$
597	PPCODE:
598	{
599	STRLEN svlen;
600	char *svptr = SvPVbyte (data, svlen);
601	UV len = SvUV (length);
602
603	SvUPGRADE (data, SVt_PV);
604	SvPOK_on (data);
605
606	if (dataoffset < 0)
607	dataoffset += svlen;
608
609	if (dataoffset < 0 \|\| dataoffset > svlen)
610	croak ("dataoffset outside of data scalar");
611
612	if (ix == EIO_WRITE)
613	{
614	/* write: check length and adjust. */
615	if (!SvOK (length) \|\| len + dataoffset > svlen)
616	len = svlen - dataoffset;
617	}
618	else
619	{
620	/* read: grow scalar as necessary */
621	svptr = SvGROW (data, len + dataoffset + 1);
622	}
623
624	if (len < 0)
625	croak ("length must not be negative");
626
627	{
628	dREQ;
629
630	req->type = ix;
631	req->sv1 = newSVsv (fh);
632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
633	: IoOFP (sv_2io (fh)));
634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
635	req->size = len;
636	req->sv2 = SvREFCNT_inc (data);
637	req->ptr2 = (char *)svptr + dataoffset;
638	req->stroffset = dataoffset;
639
640	if (!SvREADONLY (data))
641	{
642	SvREADONLY_on (data);
643	req->flags \|= FLAG_SV2_RO_OFF;
644	}
645
646	REQ_SEND;
647	}
648	}
649
650	void
651	aio_readlink (SV8 path, SV callback=&PL_sv_undef)
652	PROTOTYPE: $$;$
653	PPCODE:
654	{
655	SV *data;
656	dREQ;
657
658	req->type = EIO_READLINK;
659	req->sv1 = newSVsv (path);
660	req->ptr1 = SvPVbyte_nolen (req->sv1);
661
662	REQ_SEND;
663	}
664
665	void
666	aio_sendfile (SV out_fh, SV in_fh, SV in_offset, UV length, SV callback=&PL_sv_undef)
667	PROTOTYPE: $$$$;$
668	PPCODE:
669	{
670	dREQ;
671
672	req->type = EIO_SENDFILE;
673	req->sv1 = newSVsv (out_fh);
674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
675	req->sv2 = newSVsv (in_fh);
676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
677	req->offs = SvVAL64 (in_offset);
678	req->size = length;
679
680	REQ_SEND;
681	}
682
683	void
684	aio_readahead (SV fh, SV offset, IV length, SV *callback=&PL_sv_undef)
685	PROTOTYPE: $$$;$
686	PPCODE:
687	{
688	dREQ;
689
690	req->type = EIO_READAHEAD;
691	req->sv1 = newSVsv (fh);
692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
693	req->offs = SvVAL64 (offset);
694	req->size = length;
695
696	REQ_SEND;
697	}
698
699	void
700	aio_stat (SV8 fh_or_path, SV callback=&PL_sv_undef)
701	ALIAS:
702	aio_stat = EIO_STAT
703	aio_lstat = EIO_LSTAT
704	PPCODE:
705	{
706	dREQ;
707
708	req->sv1 = newSVsv (fh_or_path);
709
710	if (SvPOK (req->sv1))
711	{
712	req->type = ix;
713	req->ptr1 = SvPVbyte_nolen (req->sv1);
714	}
715	else
716	{
717	req->type = EIO_FSTAT;
718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
719	}
720
721	REQ_SEND;
722	}
723
724	void
725	aio_utime (SV8 fh_or_path, SV atime, SV mtime, SV callback=&PL_sv_undef)
726	PPCODE:
727	{
728	dREQ;
729
730	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
731	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
732	req->sv1 = newSVsv (fh_or_path);
733
734	if (SvPOK (req->sv1))
735	{
736	req->type = EIO_UTIME;
737	req->ptr1 = SvPVbyte_nolen (req->sv1);
738	}
739	else
740	{
741	req->type = EIO_FUTIME;
742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
743	}
744
745	REQ_SEND;
746	}
747
748	void
749	aio_truncate (SV8 fh_or_path, SV offset, SV *callback=&PL_sv_undef)
750	PPCODE:
751	{
752	dREQ;
753
754	req->sv1 = newSVsv (fh_or_path);
755	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
756
757	if (SvPOK (req->sv1))
758	{
759	req->type = EIO_TRUNCATE;
760	req->ptr1 = SvPVbyte_nolen (req->sv1);
761	}
762	else
763	{
764	req->type = EIO_FTRUNCATE;
765	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
766	}
767
768	REQ_SEND;
769	}
770
771	void
772	aio_chmod (SV8 fh_or_path, int mode, SV callback=&PL_sv_undef)
773	ALIAS:
774	aio_chmod = EIO_CHMOD
775	aio_mkdir = EIO_MKDIR
776	PPCODE:
777	{
778	dREQ;
779
780	req->int2 = mode;
781	req->sv1 = newSVsv (fh_or_path);
782
783	if (SvPOK (req->sv1))
784	{
785	req->type = ix;
786	req->ptr1 = SvPVbyte_nolen (req->sv1);
787	}
788	else
789	{
790	req->type = EIO_FCHMOD;
791	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
792	}
793
794	REQ_SEND;
795	}
796
797	void
798	aio_chown (SV8 fh_or_path, SV uid, SV gid, SV callback=&PL_sv_undef)
799	PPCODE:
800	{
801	dREQ;
802
803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
805	req->sv1 = newSVsv (fh_or_path);
806
807	if (SvPOK (req->sv1))
808	{
809	req->type = EIO_CHOWN;
810	req->ptr1 = SvPVbyte_nolen (req->sv1);
811	}
812	else
813	{
814	req->type = EIO_FCHOWN;
815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
816	}
817
818	REQ_SEND;
819	}
820
821	void
822	aio_unlink (SV8 pathname, SV callback=&PL_sv_undef)
823	ALIAS:
824	aio_unlink = EIO_UNLINK
825	aio_rmdir = EIO_RMDIR
826	aio_readdir = EIO_READDIR
827	PPCODE:
828	{
829	dREQ;
830
831	req->type = ix;
832	req->sv1 = newSVsv (pathname);
833	req->ptr1 = SvPVbyte_nolen (req->sv1);
834
835	REQ_SEND;
836	}
837
838	void
839	aio_link (SV8 oldpath, SV8 newpath, SV *callback=&PL_sv_undef)
840	ALIAS:
841	aio_link = EIO_LINK
842	aio_symlink = EIO_SYMLINK
843	aio_rename = EIO_RENAME
844	PPCODE:
845	{
846	dREQ;
847
848	req->type = ix;
849	req->sv1 = newSVsv (oldpath);
850	req->ptr1 = SvPVbyte_nolen (req->sv1);
851	req->sv2 = newSVsv (newpath);
852	req->ptr2 = SvPVbyte_nolen (req->sv2);
853
854	REQ_SEND;
855	}
856
857	void
858	aio_mknod (SV8 pathname, int mode, UV dev, SV callback=&PL_sv_undef)
859	PPCODE:
860	{
861	dREQ;
862
863	req->type = EIO_MKNOD;
864	req->sv1 = newSVsv (pathname);
865	req->ptr1 = SvPVbyte_nolen (req->sv1);
866	req->int2 = (mode_t)mode;
867	req->offs = dev;
868
869	REQ_SEND;
870	}
871
872	void
873	aio_busy (double delay, SV *callback=&PL_sv_undef)
874	PPCODE:
875	{
876	dREQ;
877
878	req->type = EIO_BUSY;
879	req->nv1 = delay < 0. ? 0. : delay;
880
881	REQ_SEND;
882	}
883
884	void
885	aio_group (SV *callback=&PL_sv_undef)
886	PROTOTYPE: ;$
887	PPCODE:
888	{
889	dREQ;
890
891	req->type = EIO_GROUP;
892
893	eio_submit (req);
894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
895	}
896
897	void
898	aio_nop (SV *callback=&PL_sv_undef)
899	ALIAS:
900	aio_nop = EIO_NOP
901	aio_sync = EIO_SYNC
902	PPCODE:
903	{
904	dREQ;
905
906	req->type = ix;
907
908	REQ_SEND;
909	}
910
911	int
912	aioreq_pri (int pri = 0)
913	PROTOTYPE: ;$
914	CODE:
915	RETVAL = next_pri;
916	if (items > 0)
917	{
918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
920	next_pri = pri;
921	}
922	OUTPUT:
923	RETVAL
924
925	void
926	aioreq_nice (int nice = 0)
927	CODE:
928	nice = next_pri - nice;
929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
931	next_pri = nice;
932
933	void
934	flush ()
935	PROTOTYPE:
936	CODE:
937	while (eio_nreqs ())
938	{
939	poll_wait ();
940	poll_cb ();
941	}
942
943	int
944	poll()
945	PROTOTYPE:
946	CODE:
947	poll_wait ();
948	RETVAL = poll_cb ();
949	OUTPUT:
950	RETVAL
951
952	int
953	poll_fileno()
954	PROTOTYPE:
955	CODE:
956	RETVAL = respipe [0];
957	OUTPUT:
958	RETVAL
959
960	int
961	poll_cb(...)
962	PROTOTYPE:
963	CODE:
964	RETVAL = poll_cb ();
965	OUTPUT:
966	RETVAL
967
968	void
969	poll_wait()
970	PROTOTYPE:
971	CODE:
972	poll_wait ();
973
974	int
975	nreqs()
976	PROTOTYPE:
977	CODE:
978	RETVAL = eio_nreqs ();
979	OUTPUT:
980	RETVAL
981
982	int
983	nready()
984	PROTOTYPE:
985	CODE:
986	RETVAL = eio_nready ();
987	OUTPUT:
988	RETVAL
989
990	int
991	npending()
992	PROTOTYPE:
993	CODE:
994	RETVAL = eio_npending ();
995	OUTPUT:
996	RETVAL
997
998	int
999	nthreads()
1000	PROTOTYPE:
1001	CODE:
1002	RETVAL = eio_nthreads ();
1003	OUTPUT:
1004	RETVAL
1005
1006	void _on_next_submit (SV *cb)
1007	CODE:
1008	SvREFCNT_dec (on_next_submit);
1009	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1010
1011	PROTOTYPES: DISABLE
1012
1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1014
1015	void
1016	cancel (aio_req_ornot req)
1017	CODE:
1018	eio_cancel (req);
1019
1020	void
1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1022	CODE:
1023	SvREFCNT_dec (req->callback);
1024	req->callback = newSVsv (callback);
1025
1026	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1027
1028	void
1029	add (aio_req grp, ...)
1030	PPCODE:
1031	{
1032	int i;
1033
1034	if (grp->int1 == 2)
1035	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1036
1037	for (i = 1; i < items; ++i )
1038	{
1039	aio_req req;
1040
1041	if (GIMME_V != G_VOID)
1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1043
1044	req = SvAIO_REQ (ST (i));
1045
1046	if (req)
1047	eio_grp_add (grp, req);
1048	}
1049	}
1050
1051	void
1052	cancel_subs (aio_req_ornot req)
1053	CODE:
1054	req_cancel_subs (req);
1055
1056	void
1057	result (aio_req grp, ...)
1058	CODE:
1059	{
1060	int i;
1061	AV *av;
1062
1063	grp->errorno = errno;
1064
1065	av = newAV ();
1066
1067	for (i = 1; i < items; ++i )
1068	av_push (av, newSVsv (ST (i)));
1069
1070	SvREFCNT_dec (grp->sv1);
1071	grp->sv1 = (SV *)av;
1072	}
1073
1074	void
1075	errno (aio_req grp, int errorno = errno)
1076	CODE:
1077	grp->errorno = errorno;
1078
1079	void
1080	limit (aio_req grp, int limit)
1081	CODE:
1082	eio_grp_limit (grp, limit);
1083
1084	void
1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
1086	CODE:
1087	{
1088	SvREFCNT_dec (grp->sv2);
1089	grp->sv2 = newSVsv (callback);
1090
1091	if (grp->int2 <= 0)
1092	grp->int2 = 2;
1093
1094	eio_grp_limit (grp, grp->int2);
1095	}
1096