ljr/wcmtools/perlbal/lib/Perlbal/AIO.pm

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Perl
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2019-02-05 21:49:12 +00:00
package Perlbal::AIO;
use POSIX qw();
sub aio_stat {
my ($file, $cb) = @_;
if ($Perlbal::AIO_MODE eq "linux") {
Linux::AIO::aio_stat($file, $cb);
} elsif ($Perlbal::AIO_MODE eq "ioaio") {
IO::AIO::aio_stat($file, $cb);
} else {
stat($file);
$cb->();
}
}
sub _fh_of_fd_mode {
my ($fd, $mode) = @_;
return undef unless defined $fd && $fd >= 0;
#TODO: use the write MODE for the given $mode;
my $fh = IO::Handle->new_from_fd($fd, 'r+');
my $num = fileno($fh);
return $fh;
}
sub aio_open {
my ($file, $flags, $mode, $cb) = @_;
if ($Perlbal::AIO_MODE eq "linux") {
Linux::AIO::aio_open($file, $flags, $mode, sub {
my $fd = shift;
my $fh = _fh_of_fd_mode($fd, $mode);
$cb->($fh);
});
} elsif ($Perlbal::AIO_MODE eq "ioaio") {
IO::AIO::aio_open($file, $flags, $mode, $cb);
} else {
my $fh;
my $rv = sysopen($fh, $file, $flags, $mode);
$cb->($rv ? $fh : undef);
}
}
sub aio_unlink {
my ($file, $cb) = @_;
if ($Perlbal::AIO_MODE eq "linux") {
Linux::AIO::aio_unlink($file, $cb);
} elsif ($Perlbal::AIO_MODE eq "ioaio") {
IO::AIO::aio_unlink($file, $cb);
} else {
my $rv = unlink($file);
$rv = $rv ? 0 : -1;
$cb->($rv);
}
}
sub aio_write {
# 0 1 2 3(data) 4
my ($fh, $offset, $length, undef, $cb) = @_;
return no_fh($cb) unless $fh;
if ($Perlbal::AIO_MODE eq "linux") {
Linux::AIO::aio_write($fh, $offset, $length, $_[3], 0, $cb);
} elsif ($Perlbal::AIO_MODE eq "ioaio") {
IO::AIO::aio_write($fh, $offset, $length, $_[3], 0, $cb);
} else {
my $rv = syswrite($fh, $_[3], $length, $offset);
$cb->($rv);
}
}
sub aio_read {
# 0 1 2 3(data) 4
my ($fh, $offset, $length, undef, $cb) = @_;
return no_fh($cb) unless $fh;
if ($Perlbal::AIO_MODE eq "linux") {
Linux::AIO::aio_read($fh, $offset, $length, $_[3], 0, $cb);
} elsif ($Perlbal::AIO_MODE eq "ioaio") {
IO::AIO::aio_read($fh, $offset, $length, $_[3], 0, $cb);
} else {
my $rv = sysread($fh, $_[3], $length, $offset);
$cb->($rv);
}
}
sub no_fh {
my $cb = shift;
my $i = 1;
my $stack_trace = "";
while (my ($pkg, $filename, $line, $subroutine, $hasargs,
$wantarray, $evaltext, $is_require, $hints, $bitmask) = caller($i++)) {
$stack_trace .= " at $filename:$line $subroutine\n";
}
Perlbal::log("crit", "Undef \$fh: $stack_trace");
$cb->(undef);
return undef;
}
1;