93 lines
2.5 KiB
PHP
93 lines
2.5 KiB
PHP
<?php
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/**
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* Some functions that are useful during startup.
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*/
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class MWInit {
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static $compilerVersion;
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/**
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* Get the version of HipHop used to compile, or false if MediaWiki was not
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* compiled. This works by having our build script insert a special function
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* into the compiled code.
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*/
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static function getCompilerVersion() {
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if ( self::$compilerVersion === null ) {
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if ( self::functionExists( 'wfHipHopCompilerVersion' ) ) {
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self::$compilerVersion = wfHipHopCompilerVersion();
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} else {
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self::$compilerVersion = false;
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}
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}
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return self::$compilerVersion;
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}
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/**
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* Returns true if we are running under HipHop, whether in compiled or
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* interpreted mode.
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*/
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static function isHipHop() {
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return function_exists( 'hphp_thread_set_warmup_enabled' );
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}
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/**
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* Get a fully-qualified path for a source file relative to $IP. Including
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* such a path under HipHop will force the file to be interpreted. This is
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* useful for configuration files.
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*/
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static function interpretedPath( $file ) {
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global $IP;
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return "$IP/$file";
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}
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/**
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* If we are running code compiled by HipHop, this will pass through the
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* input path, assumed to be relative to $IP. If the code is interpreted,
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* it will converted to a fully qualified path. It is necessary to use a
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* path which is relative to $IP in order to make HipHop use its compiled
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* code.
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*/
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static function compiledPath( $file ) {
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global $IP;
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if ( defined( 'MW_COMPILED' ) ) {
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return $file;
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} else {
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return "$IP/$file";
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}
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}
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/**
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* Determine whether a class exists, using a method which works under HipHop.
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*
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* Note that it's not possible to implement this with any variant of
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* class_exists(), because class_exists() returns false for classes which
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* are compiled in.
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*
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* Calling class_exists() on a literal string causes the class to be made
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* "volatile", which means (as of March 2011) that the class is broken and
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* can't be used at all. So don't do that. See
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* https://github.com/facebook/hiphop-php/issues/314
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*/
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static function classExists( $class ) {
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try {
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$r = new ReflectionClass( $class );
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} catch( ReflectionException $r ) {
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$r = false;
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}
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return $r !== false;
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}
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/**
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* Determine whether a function exists, using a method which works under
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* HipHop.
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*/
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static function functionExists( $function ) {
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try {
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$r = new ReflectionFunction( $function );
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} catch( ReflectionException $r ) {
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$r = false;
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}
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return $r !== false;
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}
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}
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