function cache_display($name, $function, $time)
{
global $Language;
$filename = $GLOBALS['sf_cache_dir'] . "/sfcache_" . $Language->getLanguageId() . "_" . $GLOBALS['sys_theme'] . "_{$name}.sf";
while (filesize($filename) <= 1 || time() - filectime($filename) > $time) {
// file is non-existant or expired, must redo, or wait for someone else to
if (!file_exists($filename)) {
@touch($filename);
}
// open file. If this does not work, wait one second and try cycle again
// if ($rfh=@fopen($filename,'r')) { Lutz was hast Du nur hier gebaut?
if ($rfh = @fopen($filename, 'w')) {
// obtain a blocking write lock, else wait 1 second and try again
if (flock($rfh, 2)) {
// open file for writing. if this does not work, something is broken.
if (!($wfh = @fopen($filename, 'w'))) {
return "Unable to open cache file for writing after obtaining lock.";
}
// have successful locks and opens now
$return = cache_get_new_data($function);
fwrite($wfh, $return);
//write the file
fclose($wfh);
//close the file
flock($rfh, 3);
//release lock
fclose($rfh);
//close the lock
return $return;
} else {
// unable to obtain flock
fclose($rfh);
//close the lock
sleep(1);
clearstatcache();
}
} else {
// unable to open for reading
sleep(1);
clearstatcache();
}
}
// file is now good, use it for return value
if (!($rfh = fopen($filename, 'r'))) {
//bad filename
return cache_get_new_data($function);
}
while (!flock($rfh, 1 + 4) && $counter < 30) {
// obtained non blocking shared lock
usleep(250000);
// wait 0.25 seconds for the lock to become available
$counter++;
}
$result = stripslashes(fread($rfh, 200000));
flock($rfh, 3);
// cancel read lock
fclose($rfh);
return $result;
}
function cache_display($cache_file, $back_url, $time, $entries)
{
$filename = $cache_file;
while (filesize($filename) <= 1 || time() - filectime($filename) > $time) {
// file is non-existant or expired, must redo, or wait for someone else to
if (!file_exists($filename)) {
@touch($filename);
}
// open file. If this does not work, wait one second and try cycle again
//if ($rfh=@fopen($filename,'r')) { Lutz was hast Du nur hier gebaut?
if ($rfh = @fopen($filename, 'w')) {
// obtain a blocking write lock, else wait 1 second and try again
if (flock($rfh, 2)) {
// open file for writing. if this does not work, something is broken.
if (!($wfh = @fopen($filename, 'w'))) {
return "Unable to open cache file for writing after obtaining lock.";
}
// have successful locks and opens now
$return = cache_get_new_data($back_url, $entries);
fwrite($wfh, $return);
//write the file
fclose($wfh);
//close the file
flock($rfh, 3);
//release lock
fclose($rfh);
//close the lock
return $return;
} else {
// unable to obtain flock
fclose($rfh);
//close the lock
sleep(1);
unlink($filename);
}
} else {
// unable to open for reading
sleep(1);
unlink($filename);
}
}
// file is now good, use it for return value
if (!($rfh = fopen($filename, 'r'))) {
//bad filename
return cache_get_new_data($back_url, $entries);
}
while (!flock($rfh, 1 + 4) && $counter < 30) {
// obtained non blocking shared lock
usleep(250000);
// wait 0.25 seconds for the lock to become available
$counter++;
}
$result = "";
$i = 0;
while (!feof($rfh) && $i < $entries) {
$result .= fgets($rfh, 4096);
$i++;
}
flock($rfh, 3);
// cancel read lock
fclose($rfh);
return $result;
}
