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MLEHMANN / AnyEvent-7.17 / lib / AnyEvent / IO / Perl.pm 

            

              
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=head1 NAME
AnyEvent::IO::Perl - pure perl backend for AnyEvent::IO
=head1 SYNOPSIS
   use AnyEvent::IO;
=head1 DESCRIPTION
This is the pure-perl backend of L<AnyEvent::IO> - it is always available,
but does not actually implement any I/O operation asynchronously -
everything is synchronous.
For simple programs that can wait for I/O, this is likely the most
efficient implementation.
=cut
package AnyEvent::IO::Perl;
use AnyEvent (); BEGIN { AnyEvent::common_sense }
our $VERSION = $AnyEvent::VERSION;
package AnyEvent::IO;
our $MODEL = "AnyEvent::IO::Perl";
sub aio_load($$) {
   my ($path, $cb, $fh, $data) = @_;
   $cb->(
      (open $fh, "<:raw:perlio", $path
         and stat $fh
         and (-s _) == sysread $fh, $data, -s _)
      ? $data : ()
   );
}
sub aio_open($$$$) {
   sysopen my $fh, $_[0], $_[1], $_[2]
      or return $_[3]();
   $_[3]($fh)
}
sub aio_close($$) {
   $_[1](close $_[0]);
}
sub aio_seek($$$$) {
   my $data;
   $_[3](sysseek $_[0], $_[1], $_[2] or ());
}
sub aio_read($$$) {
   my $data;
   $_[2]( (defined sysread $_[0], $data, $_[1]) ? $data : () );
}
sub aio_write($$$) {
   my $res = syswrite $_[0], $_[1];
   $_[2](defined $res ? $res : ());
}
sub aio_truncate($$$) {
   #TODO: raises an exception on !truncate|ftruncate systems, maybe eval + set errno?
   $_[2](truncate $_[0], $_[1] or ());
}
sub aio_utime($$$$) {
   $_[3](utime $_[1], $_[2], $_[0] or ());
}
sub aio_chown($$$$) {
   $_[3](chown defined $_[1] ? $_[1] : -1, defined $_[2] ? $_[2] : -1, $_[0] or ());
}
sub aio_chmod($$$) {
   $_[2](chmod $_[1], $_[0] or ());
}
sub aio_stat($$) {
   $_[1](stat  $_[0]);
}
sub aio_lstat($$) {
   $_[1](lstat $_[0]);
}
sub aio_link($$$) {
   $_[2](link $_[0], $_[1] or ());
}
sub aio_symlink($$$) {
   #TODO: raises an exception on !symlink systems, maybe eval + set errno?
   $_[2](symlink $_[0], $_[1] or ());
}
sub aio_readlink($$) {
   #TODO: raises an exception on !symlink systems, maybe eval + set errno?
   my $res = readlink $_[0];
   $_[1](defined $res ? $res : ());
}
sub aio_rename($$$) {
   $_[2](rename $_[0], $_[1] or ());
}
sub aio_unlink($$) {
   $_[1](unlink $_[0] or ());
}
sub aio_mkdir($$$) {
   $_[2](mkdir $_[0], $_[1] or ());
}
sub aio_rmdir($$) {
   $_[1](rmdir $_[0] or ());
}
sub aio_readdir($$) {
   my ($fh, @res);
   opendir $fh, $_[0]
      or return $_[1]();
   @res = grep !/^\.\.?$/, readdir $fh;
   $_[1]((closedir $fh) ? \@res : ());
}
=head1 SEE ALSO
L<AnyEvent::IO>, L<AnyEvent>.
=head1 AUTHOR
 Marc Lehmann <schmorp@schmorp.de>
 http://anyevent.schmorp.de
=cut
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