/**
* Class for getting statistically unique IDs
*
- * @since 1.20
+ * @since 1.21
*/
class UIDGenerator {
/** @var UIDGenerator */
protected static $instance = null;
- protected $nodeId24; // string; node ID in binary (24 bits)
protected $nodeId32; // string; node ID in binary (32 bits)
protected $nodeId48; // string; node ID in binary (48 bits)
- protected $threadId; // integer; thread ID or random integer
- protected $lockFile64; // string; local file path
protected $lockFile88; // string; local file path
protected $lockFile128; // string; local file path
- const EPOCH_MS_40 = 1325376000; // "January 1, 2012"
- const EPOCH_US_56 = 1325376000; // "January 1, 2012"
+ /** @var Array */
+ protected $fileHandles = array(); // cache file handles
+
+ const QUICK_RAND = 1; // get randomness from fast and insecure sources
protected function __construct() {
- # Try to get some ID that uniquely identifies this machine...
- wfSuppressWarnings();
- if ( wfIsWindows() ) {
- # http://technet.microsoft.com/en-us/library/bb490913.aspx
- $csv = trim( `getmac /NH /FO CSV` );
- $line = substr( $csv, 0, strcspn( $csv, "\n" ) );
- $info = str_getcsv( $line );
- $hostId = count( $info ) ? str_replace( '-', '', $info[0] ) : '';
- } else { // *nix
- # See http://linux.die.net/man/1/hostid
- $hostId = trim( `hostid` );
- }
- wfRestoreWarnings();
- $hostId = strtolower( $hostId );
- if ( preg_match( '/^[0-9a-f]{8}|[0-9a-f]{12}$/', $hostId ) ) {
- $this->nodeId24 = wfBaseConvert( substr( sha1( $hostId ), 0, 6 ), 16, 2, 24 );
- $this->nodeId32 = wfBaseConvert( substr( sha1( $hostId ), 0, 8 ), 16, 2, 32 );
- $this->nodeId48 = wfBaseConvert( $hostId, 16, 2, 48 );
- } else { // fallback to host name
- $hash = sha1( wfHostname() . ':' . php_uname( 's' ) . ':' . php_uname( 'm' ) );
- $this->nodeId24 = wfBaseConvert( substr( $hash, 0, 6 ), 16, 2, 24 );
- $this->nodeId32 = wfBaseConvert( substr( $hash, 0, 8 ), 16, 2, 32 );
- $this->nodeId48 = wfBaseConvert( substr( $hash, 0, 12 ), 16, 2, 48 );
+ $idFile = wfTempDir() . '/mw-' . __CLASS__ . '-UID-nodeid';
+ $nodeId = is_file( $idFile ) ? file_get_contents( $idFile ) : '';
+ // Try to get some ID that uniquely identifies this machine (RFC 4122)...
+ if ( !preg_match( '/^[0-9a-f]{12}$/i', $nodeId ) ) {
+ wfSuppressWarnings();
+ if ( wfIsWindows() ) {
+ // http://technet.microsoft.com/en-us/library/bb490913.aspx
+ $csv = trim( wfShellExec( 'getmac /NH /FO CSV' ) );
+ $line = substr( $csv, 0, strcspn( $csv, "\n" ) );
+ $info = str_getcsv( $line );
+ $nodeId = isset( $info[0] ) ? str_replace( '-', '', $info[0] ) : '';
+ } elseif ( is_executable( '/sbin/ifconfig' ) ) { // Linux/BSD/Solaris/OS X
+ // See http://linux.die.net/man/8/ifconfig
+ $m = array();
+ preg_match( '/\s([0-9a-f]{2}(:[0-9a-f]{2}){5})\s/',
+ wfShellExec( '/sbin/ifconfig -a' ), $m );
+ $nodeId = isset( $m[1] ) ? str_replace( ':', '', $m[1] ) : '';
+ }
+ wfRestoreWarnings();
+ if ( !preg_match( '/^[0-9a-f]{12}$/i', $nodeId ) ) {
+ $nodeId = MWCryptRand::generateHex( 12, true );
+ $nodeId[1] = dechex( hexdec( $nodeId[1] ) | 0x1 ); // set multicast bit
+ }
+ file_put_contents( $idFile, $nodeId ); // cache
}
- # UID128 should be unique without having to check. The flock() calls may not be effective
- # on operating systems when PHP is running in a threaded server model. In such cases, the
- # Zend Thread Safety extension should be installed per php.net guidelines. This extension
- # gives us zend_thread_id(), which we include in the UID to avoid collisions.
- # See http://www.php.net/manual/en/install.unix.apache2.php.
- $this->threadId = function_exists( 'zend_thread_id' ) ? zend_thread_id() : 0;
- $this->lockFile64 = wfTempDir() . '/mw-' . __CLASS__ . '-UID-64.lock';
- $this->lockFile88 = wfTempDir() . '/mw-' . __CLASS__ . '-UID-88.lock';
- $this->lockFile128 = wfTempDir() . '/mw-' . __CLASS__ . '-UID-128.lock';
+ $this->nodeId32 = wfBaseConvert( substr( sha1( $nodeId ), 0, 8 ), 16, 2, 32 );
+ $this->nodeId48 = wfBaseConvert( $nodeId, 16, 2, 48 );
+ // If different processes run as different users, they may have different temp dirs.
+ // This is dealt with by initializing the clock sequence number and counters randomly.
+ $this->lockFile88 = wfTempDir() . '/mw-' . __CLASS__ . '-UID-88';
+ $this->lockFile128 = wfTempDir() . '/mw-' . __CLASS__ . '-UID-128';
}
/**
}
/**
- * Get a statistically unique 64-bit unsigned integer ID string.
+ * Get a statistically unique 88-bit unsigned integer ID string.
* The bits of the UID are prefixed with the time (down to the millisecond).
*
- * These IDs are suitable as values for the shard column of sharded DB tables.
+ * These IDs are suitable as values for the shard key of distributed data.
* If a column uses these as values, it should be declared UNIQUE to handle collisions.
* New rows almost always have higher UIDs, which makes B-TREE updates on INSERT fast.
- * They can also be stored efficiently as a "BIGINT UNSIGNED" in MySQL.
+ * They can also be stored "DECIMAL(27) UNSIGNED" or BINARY(11) in MySQL.
*
* UID generation is serialized on each server (as the node ID is for the whole machine).
*
- * @return string
+ * @param $base integer Specifies a base other than 10
+ * @return string Number
* @throws MWException
*/
- public static function timestampedUID64() {
- $generator = self::singleton();
-
- // Acquire the UID lock file
- $handle = fopen( $generator->lockFile64, 'a' );
- if ( $handle === false ) {
- throw new MWException( "Could not open '{$this->lockFile64}'." );
- } elseif ( !flock( $handle, LOCK_EX ) ) {
- fclose( $handle ); // bail out
- throw new MWException( 'Could not acquire local UID64 lock.' );
+ public static function newTimestampedUID88( $base = 10 ) {
+ if ( !is_integer( $base ) || $base > 36 || $base < 2 ) {
+ throw new MWException( "Base must an integer be between 2 and 36" );
}
- // Get the current UNIX timestamp on this server
- $time = self::millitime(); // millisecond precision
- // Delay so the next process on this server will generate higher UIDs
- while ( self::lessThanOrEqualTime( self::millitime(), $time ) );
- // Release the UID lock file
- flock( $handle, LOCK_UN );
- fclose( $handle );
-
- // Generate a UID that is higher than the last one from this server
- return $generator->newTimestampedID64( $time );
+ $gen = self::singleton();
+ $time = $gen->getTimestampAndDelay( 'lockFile88', 1, 1024 );
+ return wfBaseConvert( $gen->getTimestampedID88( $time ), 2, $base );
}
/**
- * @param $time array Result of UIDGenerator::millitime()
- * @return string
+ * @param array $time (UIDGenerator::millitime(), clock sequence)
+ * @return string 88 bits
*/
- protected function newTimestampedID64( array $time ) {
- list( $sec, $msec ) = $time;
- $sec = $sec - self::EPOCH_MS_40; // start from epoch
- # Take the 40 MSBs of "milliseconds since epoch" (rolls over in 2046)
- if ( PHP_INT_SIZE === 8 ) { // 64 bit integers
- $ts = ( 1e3 * $sec + $msec );
- $id_bin = str_pad( decbin( $ts % pow( 2, 40 ) ), 40, '0', STR_PAD_LEFT );
- } elseif ( extension_loaded( 'bcmath' ) ) { // 32 bit integers
- $ts = bcadd( bcmul( $sec, 1e3 ), $msec );
- $id_bin = wfBaseConvert( bcmod( $ts, bcpow( 2, 40 ) ), 10, 2, 40 );
- } else {
- throw new MWException( 'bcmath extension required for 32 bit machines.' );
- }
- # Add the 24 bit node ID resulting in 64 bits total
- $id_bin .= $this->nodeId24;
- # Convert to a 1-20 digit integer string
- if ( strlen( $id_bin ) !== 64 ) {
+ protected function getTimestampedID88( array $info ) {
+ list( $time, $counter ) = $info;
+ // Take the 46 MSBs of "milliseconds since epoch"
+ $id_bin = $this->millisecondsSinceEpochBinary( $time );
+ // Add a 10 bit counter resulting in 56 bits total
+ $id_bin .= str_pad( decbin( $counter ), 10, '0', STR_PAD_LEFT );
+ // Add the 32 bit node ID resulting in 88 bits total
+ $id_bin .= $this->nodeId32;
+ // Convert to a 1-27 digit integer string
+ if ( strlen( $id_bin ) !== 88 ) {
throw new MWException( "Detected overflow for millisecond timestamp." );
}
- return wfBaseConvert( $id_bin, 2, 10 );
+ return $id_bin;
}
/**
- * Get a statistically unique 88-bit unsigned integer ID string.
- * The bits of the UID are prefixed with the time (down to the microsecond).
+ * Get a statistically unique 128-bit unsigned integer ID string.
+ * The bits of the UID are prefixed with the time (down to the millisecond).
*
- * These IDs are suitable as values for the shard column of sharded DB tables.
- * If a column uses these as values, it should be declared UNIQUE to handle collisions.
+ * These IDs are suitable as globally unique IDs, without any enforced uniqueness.
* New rows almost always have higher UIDs, which makes B-TREE updates on INSERT fast.
- * They can also be stored reasonably as a "DECIMAL(27) UNSIGNED" in MySQL.
+ * They can also be stored as "DECIMAL(39) UNSIGNED" or BINARY(16) in MySQL.
*
* UID generation is serialized on each server (as the node ID is for the whole machine).
*
- * @return string
+ * @param $base integer Specifies a base other than 10
+ * @return string Number
* @throws MWException
*/
- public static function timestampedUID88() {
- $generator = self::singleton();
-
- // Acquire the UID lock file
- $handle = fopen( $generator->lockFile88, 'a' );
- if ( $handle === false ) {
- throw new MWException( "Could not open '{$this->lockFile88}'." );
- } elseif ( !flock( $handle, LOCK_EX ) ) {
- fclose( $handle ); // bail out
- throw new MWException( 'Could not acquire local UID88 lock.' );
+ public static function newTimestampedUID128( $base = 10 ) {
+ if ( !is_integer( $base ) || $base > 36 || $base < 2 ) {
+ throw new MWException( "Base must be an integer between 2 and 36" );
}
- // Get the current UNIX timestamp on this server
- $time = self::microtime(); // microsecond precision
- // Delay so the next process on this server will generate higher UIDs
- while ( self::lessThanOrEqualTime( self::microtime(), $time ) );
- // Release the UID lock file
- flock( $handle, LOCK_UN );
- fclose( $handle );
-
- // Generate a UID that is higher than the last one from this server
- return $generator->newTimestampedID88( $time );
+ $gen = self::singleton();
+ $time = $gen->getTimestampAndDelay( 'lockFile128', 16384, 1048576 );
+ return wfBaseConvert( $gen->getTimestampedID128( $time ), 2, $base );
}
/**
- * @param $time array Result of UIDGenerator::microtime()
- * @return string
+ * @param array $info (UIDGenerator::millitime(), counter, clock sequence)
+ * @return string 128 bits
*/
- protected function newTimestampedID88( array $time ) {
- list( $sec, $usec ) = $time;
- $sec = $sec - self::EPOCH_US_56; // start from epoch
- # Take the 56 MSBs of "microseconds since epoch" (rolls over in 4354)
- if ( PHP_INT_SIZE === 8 ) { // 64 bit integers
- $ts = ( 1e6 * $sec + $usec );
- $id_bin = str_pad( decbin( $ts % pow( 2, 56 ) ), 56, '0', STR_PAD_LEFT );
- } elseif ( extension_loaded( 'bcmath' ) ) { // 32 bit integers
- $ts = bcadd( bcmul( $sec, 1e6 ), $usec );
- $id_bin = wfBaseConvert( bcmod( $ts, bcpow( 2, 56 ) ), 10, 2, 56 );
- } else {
- throw new MWException( 'bcmath extension required for 32 bit machines.' );
- }
- # Add the 32 bit node ID resulting in 88 bits total
- $id_bin .= $this->nodeId32;
- # Convert to a 1-27 digit integer string
- if ( strlen( $id_bin ) !== 88 ) {
- throw new MWException( "Detected overflow for microsecond timestamp." );
+ protected function getTimestampedID128( array $info ) {
+ list( $time, $counter, $clkSeq ) = $info;
+ // Take the 46 MSBs of "milliseconds since epoch"
+ $id_bin = $this->millisecondsSinceEpochBinary( $time );
+ // Add a 20 bit counter resulting in 66 bits total
+ $id_bin .= str_pad( decbin( $counter ), 20, '0', STR_PAD_LEFT );
+ // Add a 14 bit clock sequence number resulting in 80 bits total
+ $id_bin .= str_pad( decbin( $clkSeq ), 14, '0', STR_PAD_LEFT );
+ // Add the 48 bit node ID resulting in 128 bits total
+ $id_bin .= $this->nodeId48;
+ // Convert to a 1-39 digit integer string
+ if ( strlen( $id_bin ) !== 128 ) {
+ throw new MWException( "Detected overflow for millisecond timestamp." );
}
- return wfBaseConvert( $id_bin, 2, 10 );
+ return $id_bin;
}
/**
- * Get a statistically unique 128-bit unsigned integer ID string.
- * The bits of the UID are prefixed with the time (down to the microsecond).
- *
- * These IDs are suitable as globally unique IDs, without any enforced uniqueness.
- * New rows almost always have higher UIDs, which makes B-TREE updates on INSERT fast.
- * They can also be stored reasonably as a "DECIMAL(39) UNSIGNED" in MySQL.
- *
- * UID generation is serialized on each server (as the node ID is for the whole machine).
+ * Return an RFC4122 compliant v4 UUID
*
+ * @param $flags integer Bitfield (supports UIDGenerator::QUICK_RAND)
* @return string
* @throws MWException
*/
- public static function timestampedUID128() {
- $generator = self::singleton();
+ public static function newUUIDv4( $flags = 0 ) {
+ $hex = ( $flags & self::QUICK_RAND )
+ ? wfRandomString( 31 )
+ : MWCryptRand::generateHex( 31 );
+ return sprintf( '%s-%s-%s-%s-%s',
+ // "time_low" (32 bits)
+ substr( $hex, 0, 8 ),
+ // "time_mid" (16 bits)
+ substr( $hex, 8, 4 ),
+ // "time_hi_and_version" (16 bits)
+ '4' . substr( $hex, 12, 3 ),
+ // "clk_seq_hi_res (8 bits, variant is binary 10x) and "clk_seq_low" (8 bits)
+ dechex( 0x8 | ( hexdec( $hex[15] ) & 0x3 ) ) . $hex[16] . substr( $hex, 17, 2 ),
+ // "node" (48 bits)
+ substr( $hex, 19, 12 )
+ );
+ }
+
+ /**
+ * Return an RFC4122 compliant v4 UUID
+ *
+ * @param $flags integer Bitfield (supports UIDGenerator::QUICK_RAND)
+ * @return string 32 hex characters with no hyphens
+ * @throws MWException
+ */
+ public static function newRawUUIDv4( $flags = 0 ) {
+ return str_replace( '-', '', self::newUUIDv4( $flags ) );
+ }
+
+ /**
+ * Get a (time,counter,clock sequence) where (time,counter) is higher
+ * than any previous (time,counter) value for the given clock sequence.
+ * This is useful for making UIDs sequential on a per-node bases.
+ *
+ * @param string $lockFile Name of a local lock file
+ * @param $clockSeqSize integer The number of possible clock sequence values
+ * @param $counterSize integer The number of possible counter values
+ * @return Array (result of UIDGenerator::millitime(), counter, clock sequence)
+ * @throws MWException
+ */
+ protected function getTimestampAndDelay( $lockFile, $clockSeqSize, $counterSize ) {
+ // Get the UID lock file handle
+ if ( isset( $this->fileHandles[$lockFile] ) ) {
+ $handle = $this->fileHandles[$lockFile];
+ } else {
+ $handle = fopen( $this->$lockFile, 'cb+' );
+ $this->fileHandles[$lockFile] = $handle ?: null; // cache
+ }
// Acquire the UID lock file
- $handle = fopen( $generator->lockFile128, 'a' );
if ( $handle === false ) {
- throw new MWException( "Could not open '{$this->lockFile128}'." );
+ throw new MWException( "Could not open '{$this->$lockFile}'." );
} elseif ( !flock( $handle, LOCK_EX ) ) {
- fclose( $handle ); // bail out
- throw new MWException( 'Could not acquire local UID128 lock.' );
+ throw new MWException( "Could not acquire '{$this->$lockFile}'." );
}
- // Get the current UNIX timestamp on this server
- $time = self::microtime(); // microsecond precision
- // Delay so the next process on this server will generate higher UIDs
- while ( self::lessThanOrEqualTime( self::microtime(), $time ) );
+ // Get the current timestamp, clock sequence number, last time, and counter
+ rewind( $handle );
+ $data = explode( ' ', fgets( $handle ) ); // "<clk seq> <sec> <msec> <counter> <offset>"
+ $clockChanged = false; // clock set back significantly?
+ if ( count( $data ) == 5 ) { // last UID info already initialized
+ $clkSeq = (int) $data[0] % $clockSeqSize;
+ $prevTime = array( (int) $data[1], (int) $data[2] );
+ $offset = (int) $data[4] % $counterSize; // random counter offset
+ $counter = 0; // counter for UIDs with the same timestamp
+ // Delay until the clock reaches the time of the last ID.
+ // This detects any microtime() drift among processes.
+ $time = $this->timeWaitUntil( $prevTime );
+ if ( !$time ) { // too long to delay?
+ $clockChanged = true; // bump clock sequence number
+ $time = self::millitime();
+ } elseif ( $time == $prevTime ) {
+ // Bump the counter if there are timestamp collisions
+ $counter = (int) $data[3] % $counterSize;
+ if ( ++$counter >= $counterSize ) { // sanity (starts at 0)
+ flock( $handle, LOCK_UN ); // abort
+ throw new MWException( "Counter overflow for timestamp value." );
+ }
+ }
+ } else { // last UID info not initialized
+ $clkSeq = mt_rand( 0, $clockSeqSize - 1 );
+ $counter = 0;
+ $offset = mt_rand( 0, $counterSize - 1 );
+ $time = self::millitime();
+ }
+ // microtime() and gettimeofday() can drift from time() at least on Windows.
+ // The drift is immediate for processes running while the system clock changes.
+ // time() does not have this problem. See https://bugs.php.net/bug.php?id=42659.
+ if ( abs( time() - $time[0] ) >= 2 ) {
+ // We don't want processes using too high or low timestamps to avoid duplicate
+ // UIDs and clock sequence number churn. This process should just be restarted.
+ flock( $handle, LOCK_UN ); // abort
+ throw new MWException( "Process clock is outdated or drifted." );
+ }
+ // If microtime() is synced and a clock change was detected, then the clock went back
+ if ( $clockChanged ) {
+ // Bump the clock sequence number and also randomize the counter offset,
+ // which is useful for UIDs that do not include the clock sequence number.
+ $clkSeq = ( $clkSeq + 1 ) % $clockSeqSize;
+ $offset = mt_rand( 0, $counterSize - 1 );
+ trigger_error( "Clock was set back; sequence number incremented." );
+ }
+ // Update the (clock sequence number, timestamp, counter)
+ ftruncate( $handle, 0 );
+ rewind( $handle );
+ fwrite( $handle, "{$clkSeq} {$time[0]} {$time[1]} {$counter} {$offset}" );
+ fflush( $handle );
// Release the UID lock file
flock( $handle, LOCK_UN );
- fclose( $handle );
- // Generate a UID that is higher than the last one from this server
- return $generator->newTimestampedID128( $time );
+ return array( $time, ( $counter + $offset ) % $counterSize, $clkSeq );
}
/**
- * @param $time array Result of UIDGenerator::microtime()
- * @return string
+ * Wait till the current timestamp reaches $time and return the current
+ * timestamp. This returns false if it would have to wait more than 10ms.
+ *
+ * @param array $time Result of UIDGenerator::millitime()
+ * @return Array|bool UIDGenerator::millitime() result or false
*/
- protected function newTimestampedID128( array $time ) {
- list( $sec, $usec ) = $time;
- $sec = $sec - self::EPOCH_US_56; // start from epoch
- $rand = mt_rand( 0, 255 );
- $tid = $this->threadId ? $this->threadId : mt_rand( 0, 65535 );
- # Take the 56 MSBs of "microseconds since epoch" (rolls over in 4354)
- if ( PHP_INT_SIZE === 8 ) { // 64 bit integers
- $ts = ( 1e6 * $sec + $usec );
- $id_bin = str_pad( decbin( $ts % pow( 2, 56 ) ), 56, '0', STR_PAD_LEFT );
- } elseif ( extension_loaded( 'bcmath' ) ) { // 32 bit integers
- $ts = bcadd( bcmul( $sec, 1e6 ), $usec );
- $id_bin = wfBaseConvert( bcmod( $ts, bcpow( 2, 56 ) ), 10, 2, 56 );
- } else {
- throw new MWException( 'bcmath extension required for 32 bit machines.' );
- }
- # Add on 8 bits of randomness to make 64 bits total (2^8 = 256)
- $id_bin .= str_pad( decbin( $rand ), 8, '0', STR_PAD_LEFT );
- # Add on 16 bits of thread ID or randomness to make 80 bits total (2^16 = 65536)
- $id_bin .= str_pad( decbin( $tid % 65536 ), 16, '0', STR_PAD_LEFT );
- # Add the 48 bit node ID resulting in 128 bits total
- $id_bin .= $this->nodeId48;
- # Convert to a 1-39 digit integer string
- if ( strlen( $id_bin ) !== 128 ) {
- throw new MWException( "Detected overflow for microsecond timestamp." );
- }
- return wfBaseConvert( $id_bin, 2, 10 );
+ protected function timeWaitUntil( array $time ) {
+ do {
+ $ct = self::millitime();
+ if ( $ct >= $time ) { // http://php.net/manual/en/language.operators.comparison.php
+ return $ct; // current timestamp is higher than $time
+ }
+ } while ( ( ( $time[0] - $ct[0] )*1000 + ( $time[1] - $ct[1] ) ) <= 10 );
+
+ return false;
}
/**
- * @return array (current time in seconds, milliseconds since then)
+ * @param array $time Result of UIDGenerator::millitime()
+ * @return string 46 MSBs of "milliseconds since epoch" in binary (rolls over in 4201)
*/
- protected static function millitime() {
- list( $usec, $sec ) = explode( ' ', microtime() );
- return array( (int)$sec, (int)( $usec * 1e3 ) );
+ protected function millisecondsSinceEpochBinary( array $time ) {
+ list( $sec, $msec ) = $time;
+ if ( PHP_INT_SIZE >= 8 ) { // 64 bit integers
+ $ts = ( 1000 * $sec + $msec );
+ $id_bin = str_pad( decbin( $ts % pow( 2, 46 ) ), 46, '0', STR_PAD_LEFT );
+ } elseif ( extension_loaded( 'gmp' ) ) {
+ $ts = gmp_mod( // wrap around
+ gmp_add( gmp_mul( (string) $sec, (string) 1000 ), (string) $msec ),
+ gmp_pow( '2', '46' )
+ );
+ $id_bin = str_pad( gmp_strval( $ts, 2 ), 46, '0', STR_PAD_LEFT );
+ } elseif ( extension_loaded( 'bcmath' ) ) {
+ $ts = bcmod( // wrap around
+ bcadd( bcmul( $sec, 1000 ), $msec ),
+ bcpow( 2, 46 )
+ );
+ $id_bin = wfBaseConvert( $ts, 10, 2, 46 );
+ } else {
+ throw new MWException( 'bcmath or gmp extension required for 32 bit machines.' );
+ }
+ return $id_bin;
}
/**
- * @return array (current time in seconds, microseconds since then)
+ * @return Array (current time in seconds, milliseconds since then)
*/
- protected static function microtime() {
- list( $usec, $sec ) = explode( ' ', microtime() );
- return array( (int)$sec, (int)( $usec * 1e6 ) );
+ protected static function millitime() {
+ list( $msec, $sec ) = explode( ' ', microtime() );
+ return array( (int) $sec, (int) ( $msec * 1000 ) );
}
- /**
- * Returns true if time $t1 is <= time $t2
- *
- * @param $t1 array Result of UIDGenerator::microtime() or UIDGenerator::millitime()
- * @param $t2 array Result of UIDGenerator::microtime() or UIDGenerator::millitime()
- */
- protected static function lessThanOrEqualTime( array $t1, array $t2 ) {
- return ( $t1[0] < $t2[0] || ( $t1[0] === $t2[0] && $t1[1] <= $t2[1] ) );
+ function __destruct() {
+ array_map( 'fclose', $this->fileHandles );
}
}
dépôts / lhc / web / wiklou.git / blobdiff