Merge pull request #11056 from AdamWill/9885-opcode

add function to invalidate one opcache file, use it if possible #9885

lib/private/config.php

@@ -236,8 +236,11 @@ class Config {
 		flock($filePointer, LOCK_UN);
 		fclose($filePointer);
 
-		// Clear the opcode cache
-		\OC_Util::clearOpcodeCache();
+		// Try invalidating the opcache just for the file we wrote...
+		if (!\OC_Util::deleteFromOpcodeCache($this->configFilePath)) {
+			// But if that doesn't work, clear the whole cache.
+			\OC_Util::clearOpcodeCache();
+		}
 	}
 }
 

lib/private/util.php

@@ -1271,6 +1271,32 @@ class OC_Util {
 		return $theme;
 	}
 
+	/**
+	 * Clear a single file from the opcode cache
+	 * This is useful for writing to the config file
+	 * in case the opcode cache does not re-validate files
+	 * Returns true if successful, false if unsuccessful:
+	 * caller should fall back on clearing the entire cache
+	 * with clearOpcodeCache() if unsuccessful
+	 *
+	 * @param string $path the path of the file to clear from the cache
+	 * @return bool true if underlying function returns true, otherwise false
+	 */
+	public static function deleteFromOpcodeCache($path) {
+		$ret = false;
+		if ($path) {
+			// APC >= 3.1.1
+			if (function_exists('apc_delete_file')) {
+				$ret = @apc_delete_file($path);
+			}
+			// Zend OpCache >= 7.0.0, PHP >= 5.5.0
+			if (function_exists('opcache_invalidate')) {
+				$ret = opcache_invalidate($path);
+			}
+		}
+		return $ret;
+	}
+
 	/**
 	 * Clear the opcode cache if one exists
 	 * This is necessary for writing to the config file