From 8535a8d375ae003595b9602526bbb60688ce1a49 Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Mon, 4 Apr 2011 14:40:36 +0000
Subject: [PATCH] Added missing file from r85327.

---
 includes/Init.php | 93 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 includes/Init.php

diff --git a/includes/Init.php b/includes/Init.php
new file mode 100644
index 0000000000..4c84b9aa31
--- /dev/null
+++ b/includes/Init.php
@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * Some functions that are useful during startup.
+ */
+class MWInit {
+	static $compilerVersion;
+
+	/**
+	 * Get the version of HipHop used to compile, or false if MediaWiki was not
+	 * compiled. This works by having our build script insert a special function
+	 * into the compiled code.
+	 */
+	static function getCompilerVersion() {
+		if ( self::$compilerVersion === null ) {
+			if ( self::functionExists( 'wfHipHopCompilerVersion' ) ) {
+				self::$compilerVersion = wfHipHopCompilerVersion();
+			} else {
+				self::$compilerVersion = false;
+			}
+		}
+		return self::$compilerVersion;
+	}
+
+	/**
+	 * Returns true if we are running under HipHop, whether in compiled or 
+	 * interpreted mode.
+	 */
+	static function isHipHop() {
+		return function_exists( 'hphp_thread_set_warmup_enabled' );
+	}
+
+	/**
+	 * Get a fully-qualified path for a source file relative to $IP. Including
+	 * such a path under HipHop will force the file to be interpreted. This is
+	 * useful for configuration files. 
+	 */
+	static function interpretedPath( $file ) {
+		global $IP;
+		return "$IP/$file";
+	}
+
+	/**
+	 * If we are running code compiled by HipHop, this will pass through the 
+	 * input path, assumed to be relative to $IP. If the code is interpreted, 
+	 * it will converted to a fully qualified path. It is necessary to use a 
+	 * path which is relative to $IP in order to make HipHop use its compiled 
+	 * code.
+	 */
+	static function compiledPath( $file ) {
+		global $IP;
+
+		if ( defined( 'MW_COMPILED' ) ) {
+			return $file;
+		} else {
+			return "$IP/$file";
+		}
+	}
+
+	/**
+	 * Determine whether a class exists, using a method which works under HipHop.
+	 *
+	 * Note that it's not possible to implement this with any variant of 
+	 * class_exists(), because class_exists() returns false for classes which 
+	 * are compiled in. 
+	 *
+	 * Calling class_exists() on a literal string causes the class to be made 
+	 * "volatile", which means (as of March 2011) that the class is broken and 
+	 * can't be used at all. So don't do that. See 
+	 * https://github.com/facebook/hiphop-php/issues/314
+	 */
+	static function classExists( $class ) {
+		try {
+			$r = new ReflectionClass( $class );
+		} catch( ReflectionException $r ) {
+			$r = false;
+		}
+		return $r !== false;
+	}
+
+	/**
+	 * Determine whether a function exists, using a method which works under 
+	 * HipHop.
+	 */
+	static function functionExists( $function ) {
+		try {
+			$r = new ReflectionFunction( $function );
+		} catch( ReflectionException $r ) {
+			$r = false;
+		}
+		return $r !== false;
+	}
+}
-- 
2.20.1