| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Called from a desugaring in the parser. |
| |
| (function(global, utils) { |
| |
| "use strict"; |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalMap = global.Map; |
| var InternalArray = utils.InternalArray; |
| |
| // ------------------------------------------------------------------- |
| |
| var callSiteCache = new GlobalMap; |
| var mapGetFn = GlobalMap.prototype.get; |
| var mapSetFn = GlobalMap.prototype.set; |
| |
| |
| function SameCallSiteElements(rawStrings, other) { |
| var length = rawStrings.length; |
| var other = other.raw; |
| |
| if (length !== other.length) return false; |
| |
| for (var i = 0; i < length; ++i) { |
| if (rawStrings[i] !== other[i]) return false; |
| } |
| |
| return true; |
| } |
| |
| |
| function GetCachedCallSite(siteObj, hash) { |
| var obj = %_Call(mapGetFn, callSiteCache, hash); |
| |
| if (IS_UNDEFINED(obj)) return; |
| |
| var length = obj.length; |
| for (var i = 0; i < length; ++i) { |
| if (SameCallSiteElements(siteObj, obj[i])) return obj[i]; |
| } |
| } |
| |
| |
| function SetCachedCallSite(siteObj, hash) { |
| var obj = %_Call(mapGetFn, callSiteCache, hash); |
| var array; |
| |
| if (IS_UNDEFINED(obj)) { |
| array = new InternalArray(1); |
| array[0] = siteObj; |
| %_Call(mapSetFn, callSiteCache, hash, array); |
| } else { |
| obj.push(siteObj); |
| } |
| |
| return siteObj; |
| } |
| |
| |
| function GetTemplateCallSite(siteObj, rawStrings, hash) { |
| var cached = GetCachedCallSite(rawStrings, hash); |
| |
| if (!IS_UNDEFINED(cached)) return cached; |
| |
| %AddNamedProperty(siteObj, "raw", %object_freeze(rawStrings), |
| READ_ONLY | DONT_ENUM | DONT_DELETE); |
| |
| return SetCachedCallSite(%object_freeze(siteObj), hash); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Exports |
| |
| %InstallToContext(["get_template_call_site", GetTemplateCallSite]); |
| |
| }) |