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>

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

#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 unsigned int max_outstanding = 0x7fffffff;

static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;

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 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)
              {
                SvCUR_set (req->sv2, req->result);
                *SvEND (req->sv2) = 0;
                PUSHs (req->sv2);
              }
            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 = eio_poll ();

  if (res > 0)
    croak (0);

  return res;
}

#define dREQ                                                    \
  aio_req req;                                                  \
  int req_pri = next_pri;                                       \
  next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;                    \
                                                                \
  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                                                \
  eio_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));
#ifdef _WIN32
        X_MUTEX_CHECK (wrklock);
        X_MUTEX_CHECK (reslock);
        X_MUTEX_CHECK (reqlock);
        X_MUTEX_CHECK (reqwait);
        X_MUTEX_CHECK (preadwritelock);
        X_MUTEX_CHECK (readdirlock);

        X_COND_CHECK  (reqwait);
#else
        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");
}

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;

        data = newSV (NAME_MAX);
        SvPOK_on (data);

        req->type = EIO_READLINK;
        req->sv1  = newSVsv (path);
        req->ptr1 = SvPVbyte_nolen (req->sv1);
        req->sv2  = data;
        req->ptr2 = SvPVbyte_nolen (data);

        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->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
        if (!req->ptr2)
          {
            req_destroy (req);
            croak ("out of memory during aio_stat statdata allocation");
          }

        req->flags |= EIO_FLAG_PTR2_FREE;
        req->sv1 = newSVsv (fh_or_path);

        if (SvPOK (fh_or_path))
          {
            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 (fh_or_path))
          {
            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 (fh_or_path))
          {
            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_fchmod = EIO_FCHMOD
        aio_mkdir  = EIO_MKDIR
        PPCODE:
{
        dREQ;

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

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

        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 (fh_or_path))
          {
            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 - EIO_PRI_BIAS;
        if (items > 0)
          {
            if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
            if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
            next_pri = pri + EIO_PRI_BIAS;
          }
        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 + EIO_PRI_BIAS;

void
flush ()
        PROTOTYPE:
        CODE:
        while (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:
        if (WORDACCESS_UNSAFE) X_LOCK   (wrklock);
        RETVAL = started;
        if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
        OUTPUT:
        RETVAL

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:	1.115
Committed:	Sat May 10 18:06:41 2008 UTC (16 years ago) by root
Branch:	MAIN
Changes since 1.114:	+173 -1250 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	#ifdef _WIN32
19
20	# define EIO_STRUCT_DIRENT Direntry_t
21	# undef malloc
22	# undef free
23
24	// perl overrides all those nice win32 functions
25	# undef open
26	# undef read
27	# undef write
28	# undef send
29	# undef recv
30	# undef stat
31	# undef fstat
32	# define lstat stat
33	# undef truncate
34	# undef ftruncate
35	# undef open
36	# undef close
37	# undef unlink
38	# undef rmdir
39	# undef rename
40	# undef lseek
41
42	# define chown(a,b,c) (errno = ENOSYS, -1)
43	# define fchown(a,b,c) (errno = ENOSYS, -1)
44	# define fchmod(a,b) (errno = ENOSYS, -1)
45	# define symlink(a,b) (errno = ENOSYS, -1)
46	# define readlink(a,b,c) (errno = ENOSYS, -1)
47	# define mknod(a,b,c) (errno = ENOSYS, -1)
48	# define truncate(a,b) (errno = ENOSYS, -1)
49	# define ftruncate(fd,o) chsize ((fd), (o))
50	# define fsync(fd) _commit (fd)
51	# define opendir(fd) (errno = ENOSYS, 0)
52	# define readdir(fd) (errno = ENOSYS, -1)
53	# define closedir(fd) (errno = ENOSYS, -1)
54	# define mkdir(a,b) mkdir (a)
55
56	#else
57
58	# include <sys/time.h>
59	# include <sys/select.h>
60	# include <unistd.h>
61	# include <utime.h>
62	# include <signal.h>
63	# define EIO_STRUCT_DIRENT struct dirent
64
65	#endif
66
67	#define EIO_STRUCT_STAT Stat_t
68
69	/* use NV for 32 bit perls as it allows larger offsets */
70	#if IVSIZE >= 8
71	# define SvVAL64 SvIV
72	#else
73	# define SvVAL64 SvNV
74	#endif
75
76	static HV *stash;
77	typedef SV SV8; /* byte-sv, used for argument-checking */
78
79	#define AIO_REQ_KLASS "IO::AIO::REQ"
80	#define AIO_GRP_KLASS "IO::AIO::GRP"
81
82	#define EIO_COMMON \
83	SV *callback; \
84	SV sv1, sv2; \
85	STRLEN stroffset; \
86	SV *self
87
88	#include "libeio/eio.h"
89
90	static int req_invoke (eio_req *req);
91	#define EIO_FINISH(req) req_invoke (req)
92	static void aio_grp_feed (eio_req *grp);
93	#define EIO_FEED(req) aio_grp_feed (req)
94	static void req_destroy (eio_req *grp);
95	#define EIO_DESTROY(req) req_destroy (req)
96
97	enum {
98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
99	};
100
101	#include "libeio/eio.c"
102
103	typedef eio_req *aio_req;
104	typedef eio_req *aio_req_ornot;
105
106	static unsigned int max_outstanding = 0x7fffffff;
107
108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
109
110	static int respipe_osf [2], respipe [2] = { -1, -1 };
111
112	static void req_destroy (aio_req req);
113	static void req_cancel (aio_req req);
114
115	static void want_poll (void)
116	{
117	/* write a dummy byte to the pipe so fh becomes ready */
118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
119	}
120
121	static void done_poll (void)
122	{
123	/* read any signals sent by the worker threads */
124	char buf [4];
125	while (respipe_read (respipe [0], buf, 4) == 4)
126	;
127	}
128
129	/* must be called at most once */
130	static SV req_sv (aio_req req, const char klass)
131	{
132	if (!req->self)
133	{
134	req->self = (SV *)newHV ();
135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
136	}
137
138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
139	}
140
141	static aio_req SvAIO_REQ (SV *sv)
142	{
143	MAGIC *mg;
144
145	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
146	croak ("object of class " AIO_REQ_KLASS " expected");
147
148	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
149
150	return mg ? (aio_req)mg->mg_ptr : 0;
151	}
152
153	static void aio_grp_feed (aio_req grp)
154	{
155	if (grp->sv2 && SvOK (grp->sv2))
156	{
157	dSP;
158
159	ENTER;
160	SAVETMPS;
161	PUSHMARK (SP);
162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
163	PUTBACK;
164	call_sv (grp->sv2, G_VOID \| G_EVAL \| G_KEEPERR);
165	SPAGAIN;
166	FREETMPS;
167	LEAVE;
168	}
169	}
170
171	static int req_invoke (eio_req *req)
172	{
173	dSP;
174
175	if (req->flags & FLAG_SV2_RO_OFF)
176	SvREADONLY_off (req->sv2);
177
178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
179	{
180	ENTER;
181	SAVETMPS;
182	PUSHMARK (SP);
183	EXTEND (SP, 1);
184
185	switch (req->type)
186	{
187	case EIO_READDIR:
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	int i;
194	char *buf = req->ptr2;
195	AV *av = newAV ();
196
197	av_extend (av, req->result - 1);
198
199	for (i = 0; i < req->result; ++i)
200	{
201	SV *sv = newSVpv (buf, 0);
202
203	av_store (av, i, sv);
204	buf += SvCUR (sv) + 1;
205	}
206
207	rv = sv_2mortal (newRV_noinc ((SV *)av));
208	}
209
210	PUSHs (rv);
211	}
212	break;
213
214	case EIO_OPEN:
215	{
216	/* convert fd to fh */
217	SV *fh = &PL_sv_undef;
218
219	if (req->result >= 0)
220	{
221	GV gv = (GV )sv_newmortal ();
222	int flags = req->int1 & (O_RDONLY \| O_WRONLY \| O_RDWR);
223	char sym [64];
224	int symlen;
225
226	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
227	gv_init (gv, stash, sym, symlen, 0);
228
229	symlen = snprintf (
230	sym,
231	sizeof (sym),
232	"%s&=%d",
233	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
234	req->result
235	);
236
237	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
238	fh = (SV *)gv;
239	}
240
241	PUSHs (fh);
242	}
243	break;
244
245	case EIO_GROUP:
246	req->int1 = 2; /* mark group as finished */
247
248	if (req->sv1)
249	{
250	int i;
251	AV av = (AV )req->sv1;
252
253	EXTEND (SP, AvFILL (av) + 1);
254	for (i = 0; i <= AvFILL (av); ++i)
255	PUSHs (*av_fetch (av, i, 0));
256	}
257	break;
258
259	case EIO_NOP:
260	case EIO_BUSY:
261	break;
262
263	case EIO_READLINK:
264	if (req->result > 0)
265	{
266	SvCUR_set (req->sv2, req->result);
267	*SvEND (req->sv2) = 0;
268	PUSHs (req->sv2);
269	}
270	break;
271
272	case EIO_STAT:
273	case EIO_LSTAT:
274	case EIO_FSTAT:
275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
276	PL_laststatval = req->result;
277	PL_statcache = (EIO_STRUCT_STAT )(req->ptr2);
278	PUSHs (sv_2mortal (newSViv (req->result)));
279	break;
280
281	case EIO_READ:
282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
283	*SvEND (req->sv2) = 0;
284	PUSHs (sv_2mortal (newSViv (req->result)));
285	break;
286
287	case EIO_DUP2:
288	if (req->result > 0)
289	req->result = 0;
290	/* FALLTHROUGH */
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}
296
297	errno = req->errorno;
298
299	PUTBACK;
300	call_sv (req->callback, G_VOID \| G_EVAL \| G_DISCARD);
301	SPAGAIN;
302
303	FREETMPS;
304	LEAVE;
305
306	PUTBACK;
307	}
308
309	return !!SvTRUE (ERRSV);
310	}
311
312	static void req_destroy (aio_req req)
313	{
314	if (req->self)
315	{
316	sv_unmagic (req->self, PERL_MAGIC_ext);
317	SvREFCNT_dec (req->self);
318	}
319
320	SvREFCNT_dec (req->sv1);
321	SvREFCNT_dec (req->sv2);
322	SvREFCNT_dec (req->callback);
323
324	Safefree (req);
325	}
326
327	static void req_cancel_subs (aio_req grp)
328	{
329	aio_req sub;
330
331	if (grp->type != EIO_GROUP)
332	return;
333
334	SvREFCNT_dec (grp->sv2);
335	grp->sv2 = 0;
336
337	eio_grp_cancel (grp);
338	}
339
340	#ifdef USE_SOCKETS_AS_HANDLES
341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
342	#else
343	# define TO_SOCKET(x) (x)
344	#endif
345
346	static void
347	create_respipe (void)
348	{
349	int old_readfd = respipe [0];
350
351	if (respipe [1] >= 0)
352	respipe_close (TO_SOCKET (respipe [1]));
353
354	#ifdef _WIN32
355	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
356	#else
357	if (pipe (respipe))
358	#endif
359	croak ("unable to initialize result pipe");
360
361	if (old_readfd >= 0)
362	{
363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
364	croak ("unable to initialize result pipe(2)");
365
366	respipe_close (respipe [0]);
367	respipe [0] = old_readfd;
368	}
369
370	#ifdef _WIN32
371	int arg = 1;
372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
373	\|\| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
374	#else
375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
376	\|\| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
377	#endif
378	croak ("unable to initialize result pipe(3)");
379
380	respipe_osf [0] = TO_SOCKET (respipe [0]);
381	respipe_osf [1] = TO_SOCKET (respipe [1]);
382	}
383
384	static void poll_wait (void)
385	{
386	fd_set rfd;
387
388	while (eio_nreqs ())
389	{
390	int size;
391
392	X_LOCK (reslock);
393	size = res_queue.size;
394	X_UNLOCK (reslock);
395
396	if (size)
397	return;
398
399	maybe_start_thread ();
400
401	FD_ZERO (&rfd);
402	FD_SET (respipe [0], &rfd);
403
404	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
405	}
406	}
407
408	static int poll_cb (void)
409	{
410	int res = eio_poll ();
411
412	if (res > 0)
413	croak (0);
414
415	return res;
416	}
417
418	#define dREQ \
419	aio_req req; \
420	int req_pri = next_pri; \
421	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
422	\
423	if (SvOK (callback) && !SvROK (callback)) \
424	croak ("callback must be undef or of reference type"); \
425	\
426	Newz (0, req, 1, eio_req); \
427	if (!req) \
428	croak ("out of memory during eio_req allocation"); \
429	\
430	req->callback = newSVsv (callback); \
431	req->pri = req_pri
432
433	#define REQ_SEND \
434	eio_submit (req); \
435	\
436	if (GIMME_V != G_VOID) \
437	XPUSHs (req_sv (req, AIO_REQ_KLASS));
438
439	MODULE = IO::AIO PACKAGE = IO::AIO
440
441	PROTOTYPES: ENABLE
442
443	BOOT:
444	{
445	stash = gv_stashpv ("IO::AIO", 1);
446
447	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
448	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
449	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
450	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
451	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
452	#ifdef _WIN32
453	X_MUTEX_CHECK (wrklock);
454	X_MUTEX_CHECK (reslock);
455	X_MUTEX_CHECK (reqlock);
456	X_MUTEX_CHECK (reqwait);
457	X_MUTEX_CHECK (preadwritelock);
458	X_MUTEX_CHECK (readdirlock);
459
460	X_COND_CHECK (reqwait);
461	#else
462	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
463	#endif
464
465	create_respipe ();
466
467	if (eio_init (want_poll, done_poll) < 0)
468	croak ("IO::AIO: unable to initialise eio library");
469	}
470
471	void
472	max_poll_reqs (int nreqs)
473	PROTOTYPE: $
474	CODE:
475	eio_set_max_poll_reqs (nreqs);
476
477	void
478	max_poll_time (double nseconds)
479	PROTOTYPE: $
480	CODE:
481	eio_set_max_poll_time (nseconds);
482
483	void
484	min_parallel (int nthreads)
485	PROTOTYPE: $
486	CODE:
487	eio_set_min_parallel (nthreads);
488
489	void
490	max_parallel (int nthreads)
491	PROTOTYPE: $
492	CODE:
493	eio_set_max_parallel (nthreads);
494
495	void
496	max_idle (int nthreads)
497	PROTOTYPE: $
498	CODE:
499	eio_set_max_idle (nthreads);
500
501	void
502	max_outstanding (int maxreqs)
503	PROTOTYPE: $
504	CODE:
505	max_outstanding = maxreqs;
506
507	void
508	aio_open (SV8 pathname, int flags, int mode, SV callback=&PL_sv_undef)
509	PROTOTYPE: $$$;$
510	PPCODE:
511	{
512	dREQ;
513
514	req->type = EIO_OPEN;
515	req->sv1 = newSVsv (pathname);
516	req->ptr1 = SvPVbyte_nolen (req->sv1);
517	req->int1 = flags;
518	req->int2 = mode;
519
520	REQ_SEND;
521	}
522
523	void
524	aio_fsync (SV fh, SV callback=&PL_sv_undef)
525	PROTOTYPE: $;$
526	ALIAS:
527	aio_fsync = EIO_FSYNC
528	aio_fdatasync = EIO_FDATASYNC
529	PPCODE:
530	{
531	dREQ;
532
533	req->type = ix;
534	req->sv1 = newSVsv (fh);
535	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
536
537	REQ_SEND (req);
538	}
539
540	void
541	aio_close (SV fh, SV callback=&PL_sv_undef)
542	PROTOTYPE: $;$
543	PPCODE:
544	{
545	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
546	dREQ;
547
548	if (close_pipe < 0)
549	{
550	int pipefd [2];
551
552	if (pipe (pipefd) < 0
553	\|\| close (pipefd [1]) < 0
554	\|\| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
555	abort (); /D/
556
557	close_pipe = pipefd [0];
558	}
559
560	req->type = EIO_DUP2;
561	req->int1 = close_pipe;
562	req->sv2 = newSVsv (fh);
563	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
564
565	REQ_SEND (req);
566	}
567
568	void
569	aio_read (SV fh, SV offset, SV length, SV8 data, IV dataoffset, SV *callback=&PL_sv_undef)
570	ALIAS:
571	aio_read = EIO_READ
572	aio_write = EIO_WRITE
573	PROTOTYPE: $$$$$;$
574	PPCODE:
575	{
576	STRLEN svlen;
577	char *svptr = SvPVbyte (data, svlen);
578	UV len = SvUV (length);
579
580	SvUPGRADE (data, SVt_PV);
581	SvPOK_on (data);
582
583	if (dataoffset < 0)
584	dataoffset += svlen;
585
586	if (dataoffset < 0 \|\| dataoffset > svlen)
587	croak ("dataoffset outside of data scalar");
588
589	if (ix == EIO_WRITE)
590	{
591	/* write: check length and adjust. */
592	if (!SvOK (length) \|\| len + dataoffset > svlen)
593	len = svlen - dataoffset;
594	}
595	else
596	{
597	/* read: grow scalar as necessary */
598	svptr = SvGROW (data, len + dataoffset + 1);
599	}
600
601	if (len < 0)
602	croak ("length must not be negative");
603
604	{
605	dREQ;
606
607	req->type = ix;
608	req->sv1 = newSVsv (fh);
609	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
610	: IoOFP (sv_2io (fh)));
611	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
612	req->size = len;
613	req->sv2 = SvREFCNT_inc (data);
614	req->ptr2 = (char *)svptr + dataoffset;
615	req->stroffset = dataoffset;
616
617	if (!SvREADONLY (data))
618	{
619	SvREADONLY_on (data);
620	req->flags \|= FLAG_SV2_RO_OFF;
621	}
622
623	REQ_SEND;
624	}
625	}
626
627	void
628	aio_readlink (SV8 path, SV callback=&PL_sv_undef)
629	PROTOTYPE: $$;$
630	PPCODE:
631	{
632	SV *data;
633	dREQ;
634
635	data = newSV (NAME_MAX);
636	SvPOK_on (data);
637
638	req->type = EIO_READLINK;
639	req->sv1 = newSVsv (path);
640	req->ptr1 = SvPVbyte_nolen (req->sv1);
641	req->sv2 = data;
642	req->ptr2 = SvPVbyte_nolen (data);
643
644	REQ_SEND;
645	}
646
647	void
648	aio_sendfile (SV out_fh, SV in_fh, SV in_offset, UV length, SV callback=&PL_sv_undef)
649	PROTOTYPE: $$$$;$
650	PPCODE:
651	{
652	dREQ;
653
654	req->type = EIO_SENDFILE;
655	req->sv1 = newSVsv (out_fh);
656	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
657	req->sv2 = newSVsv (in_fh);
658	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
659	req->offs = SvVAL64 (in_offset);
660	req->size = length;
661
662	REQ_SEND;
663	}
664
665	void
666	aio_readahead (SV fh, SV offset, IV length, SV *callback=&PL_sv_undef)
667	PROTOTYPE: $$$;$
668	PPCODE:
669	{
670	dREQ;
671
672	req->type = EIO_READAHEAD;
673	req->sv1 = newSVsv (fh);
674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
675	req->offs = SvVAL64 (offset);
676	req->size = length;
677
678	REQ_SEND;
679	}
680
681	void
682	aio_stat (SV8 fh_or_path, SV callback=&PL_sv_undef)
683	ALIAS:
684	aio_stat = EIO_STAT
685	aio_lstat = EIO_LSTAT
686	PPCODE:
687	{
688	dREQ;
689
690	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
691	if (!req->ptr2)
692	{
693	req_destroy (req);
694	croak ("out of memory during aio_stat statdata allocation");
695	}
696
697	req->flags \|= EIO_FLAG_PTR2_FREE;
698	req->sv1 = newSVsv (fh_or_path);
699
700	if (SvPOK (fh_or_path))
701	{
702	req->type = ix;
703	req->ptr1 = SvPVbyte_nolen (req->sv1);
704	}
705	else
706	{
707	req->type = EIO_FSTAT;
708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
709	}
710
711	REQ_SEND;
712	}
713
714	void
715	aio_utime (SV8 fh_or_path, SV atime, SV mtime, SV callback=&PL_sv_undef)
716	PPCODE:
717	{
718	dREQ;
719
720	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
721	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
722	req->sv1 = newSVsv (fh_or_path);
723
724	if (SvPOK (fh_or_path))
725	{
726	req->type = EIO_UTIME;
727	req->ptr1 = SvPVbyte_nolen (req->sv1);
728	}
729	else
730	{
731	req->type = EIO_FUTIME;
732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
733	}
734
735	REQ_SEND;
736	}
737
738	void
739	aio_truncate (SV8 fh_or_path, SV offset, SV *callback=&PL_sv_undef)
740	PPCODE:
741	{
742	dREQ;
743
744	req->sv1 = newSVsv (fh_or_path);
745	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
746
747	if (SvPOK (fh_or_path))
748	{
749	req->type = EIO_TRUNCATE;
750	req->ptr1 = SvPVbyte_nolen (req->sv1);
751	}
752	else
753	{
754	req->type = EIO_FTRUNCATE;
755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
756	}
757
758	REQ_SEND;
759	}
760
761	void
762	aio_chmod (SV8 fh_or_path, int mode, SV callback=&PL_sv_undef)
763	ALIAS:
764	aio_chmod = EIO_CHMOD
765	aio_fchmod = EIO_FCHMOD
766	aio_mkdir = EIO_MKDIR
767	PPCODE:
768	{
769	dREQ;
770
771	req->type = ix;
772	req->int2 = mode;
773	req->sv1 = newSVsv (fh_or_path);
774
775	if (ix == EIO_FCHMOD)
776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
777	else
778	req->ptr1 = SvPVbyte_nolen (req->sv1);
779
780	REQ_SEND;
781	}
782
783	void
784	aio_chown (SV8 fh_or_path, SV uid, SV gid, SV callback=&PL_sv_undef)
785	PPCODE:
786	{
787	dREQ;
788
789	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
790	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
791	req->sv1 = newSVsv (fh_or_path);
792
793	if (SvPOK (fh_or_path))
794	{
795	req->type = EIO_CHOWN;
796	req->ptr1 = SvPVbyte_nolen (req->sv1);
797	}
798	else
799	{
800	req->type = EIO_FCHOWN;
801	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
802	}
803
804	REQ_SEND;
805	}
806
807	void
808	aio_unlink (SV8 pathname, SV callback=&PL_sv_undef)
809	ALIAS:
810	aio_unlink = EIO_UNLINK
811	aio_rmdir = EIO_RMDIR
812	aio_readdir = EIO_READDIR
813	PPCODE:
814	{
815	dREQ;
816
817	req->type = ix;
818	req->sv1 = newSVsv (pathname);
819	req->ptr1 = SvPVbyte_nolen (req->sv1);
820
821	REQ_SEND;
822	}
823
824	void
825	aio_link (SV8 oldpath, SV8 newpath, SV *callback=&PL_sv_undef)
826	ALIAS:
827	aio_link = EIO_LINK
828	aio_symlink = EIO_SYMLINK
829	aio_rename = EIO_RENAME
830	PPCODE:
831	{
832	dREQ;
833
834	req->type = ix;
835	req->sv1 = newSVsv (oldpath);
836	req->ptr1 = SvPVbyte_nolen (req->sv1);
837	req->sv2 = newSVsv (newpath);
838	req->ptr2 = SvPVbyte_nolen (req->sv2);
839
840	REQ_SEND;
841	}
842
843	void
844	aio_mknod (SV8 pathname, int mode, UV dev, SV callback=&PL_sv_undef)
845	PPCODE:
846	{
847	dREQ;
848
849	req->type = EIO_MKNOD;
850	req->sv1 = newSVsv (pathname);
851	req->ptr1 = SvPVbyte_nolen (req->sv1);
852	req->int2 = (mode_t)mode;
853	req->offs = dev;
854
855	REQ_SEND;
856	}
857
858	void
859	aio_busy (double delay, SV *callback=&PL_sv_undef)
860	PPCODE:
861	{
862	dREQ;
863
864	req->type = EIO_BUSY;
865	req->nv1 = delay < 0. ? 0. : delay;
866
867	REQ_SEND;
868	}
869
870	void
871	aio_group (SV *callback=&PL_sv_undef)
872	PROTOTYPE: ;$
873	PPCODE:
874	{
875	dREQ;
876
877	req->type = EIO_GROUP;
878
879	eio_submit (req);
880	XPUSHs (req_sv (req, AIO_GRP_KLASS));
881	}
882
883	void
884	aio_nop (SV *callback=&PL_sv_undef)
885	ALIAS:
886	aio_nop = EIO_NOP
887	aio_sync = EIO_SYNC
888	PPCODE:
889	{
890	dREQ;
891
892	req->type = ix;
893
894	REQ_SEND;
895	}
896
897	int
898	aioreq_pri (int pri = 0)
899	PROTOTYPE: ;$
900	CODE:
901	RETVAL = next_pri - EIO_PRI_BIAS;
902	if (items > 0)
903	{
904	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
905	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
906	next_pri = pri + EIO_PRI_BIAS;
907	}
908	OUTPUT:
909	RETVAL
910
911	void
912	aioreq_nice (int nice = 0)
913	CODE:
914	nice = next_pri - nice;
915	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
916	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
917	next_pri = nice + EIO_PRI_BIAS;
918
919	void
920	flush ()
921	PROTOTYPE:
922	CODE:
923	while (nreqs)
924	{
925	poll_wait ();
926	poll_cb ();
927	}
928
929	int
930	poll()
931	PROTOTYPE:
932	CODE:
933	poll_wait ();
934	RETVAL = poll_cb ();
935	OUTPUT:
936	RETVAL
937
938	int
939	poll_fileno()
940	PROTOTYPE:
941	CODE:
942	RETVAL = respipe [0];
943	OUTPUT:
944	RETVAL
945
946	int
947	poll_cb(...)
948	PROTOTYPE:
949	CODE:
950	RETVAL = poll_cb ();
951	OUTPUT:
952	RETVAL
953
954	void
955	poll_wait()
956	PROTOTYPE:
957	CODE:
958	poll_wait ();
959
960	int
961	nreqs()
962	PROTOTYPE:
963	CODE:
964	RETVAL = eio_nreqs ();
965	OUTPUT:
966	RETVAL
967
968	int
969	nready()
970	PROTOTYPE:
971	CODE:
972	RETVAL = eio_nready ();
973	OUTPUT:
974	RETVAL
975
976	int
977	npending()
978	PROTOTYPE:
979	CODE:
980	RETVAL = eio_npending ();
981	OUTPUT:
982	RETVAL
983
984	int
985	nthreads()
986	PROTOTYPE:
987	CODE:
988	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
989	RETVAL = started;
990	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
991	OUTPUT:
992	RETVAL
993
994	PROTOTYPES: DISABLE
995
996	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
997
998	void
999	cancel (aio_req_ornot req)
1000	CODE:
1001	eio_cancel (req);
1002
1003	void
1004	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1005	CODE:
1006	SvREFCNT_dec (req->callback);
1007	req->callback = newSVsv (callback);
1008
1009	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1010
1011	void
1012	add (aio_req grp, ...)
1013	PPCODE:
1014	{
1015	int i;
1016
1017	if (grp->int1 == 2)
1018	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1019
1020	for (i = 1; i < items; ++i )
1021	{
1022	aio_req req;
1023
1024	if (GIMME_V != G_VOID)
1025	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1026
1027	req = SvAIO_REQ (ST (i));
1028
1029	if (req)
1030	eio_grp_add (grp, req);
1031	}
1032	}
1033
1034	void
1035	cancel_subs (aio_req_ornot req)
1036	CODE:
1037	req_cancel_subs (req);
1038
1039	void
1040	result (aio_req grp, ...)
1041	CODE:
1042	{
1043	int i;
1044	AV *av;
1045
1046	grp->errorno = errno;
1047
1048	av = newAV ();
1049
1050	for (i = 1; i < items; ++i )
1051	av_push (av, newSVsv (ST (i)));
1052
1053	SvREFCNT_dec (grp->sv1);
1054	grp->sv1 = (SV *)av;
1055	}
1056
1057	void
1058	errno (aio_req grp, int errorno = errno)
1059	CODE:
1060	grp->errorno = errorno;
1061
1062	void
1063	limit (aio_req grp, int limit)
1064	CODE:
1065	eio_grp_limit (grp, limit);
1066
1067	void
1068	feed (aio_req grp, SV *callback=&PL_sv_undef)
1069	CODE:
1070	{
1071	SvREFCNT_dec (grp->sv2);
1072	grp->sv2 = newSVsv (callback);
1073
1074	if (grp->int2 <= 0)
1075	grp->int2 = 2;
1076
1077	eio_grp_limit (grp, grp->int2);
1078	}
1079