forked from mirrors/gecko-dev
132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_workerinternals_JSSettings_h
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#define mozilla_dom_workerinternals_JSSettings_h
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#include "jsapi.h"
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#include "mozilla/Maybe.h"
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#include "nsString.h"
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#include "nsTArray.h"
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namespace mozilla {
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namespace dom {
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namespace workerinternals {
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// Random unique constant to facilitate JSPrincipal debugging
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const uint32_t kJSPrincipalsDebugToken = 0x7e2df9d2;
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struct JSSettings
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{
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enum {
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// All the GC parameters that we support.
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JSSettings_JSGC_MAX_BYTES = 0,
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JSSettings_JSGC_MAX_MALLOC_BYTES,
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JSSettings_JSGC_HIGH_FREQUENCY_TIME_LIMIT,
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JSSettings_JSGC_LOW_FREQUENCY_HEAP_GROWTH,
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JSSettings_JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN,
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JSSettings_JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX,
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JSSettings_JSGC_HIGH_FREQUENCY_LOW_LIMIT,
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JSSettings_JSGC_HIGH_FREQUENCY_HIGH_LIMIT,
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JSSettings_JSGC_ALLOCATION_THRESHOLD,
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JSSettings_JSGC_SLICE_TIME_BUDGET,
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JSSettings_JSGC_DYNAMIC_HEAP_GROWTH,
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JSSettings_JSGC_DYNAMIC_MARK_SLICE,
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// JSGC_MODE not supported
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// This must be last so that we get an accurate count.
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kGCSettingsArraySize
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};
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struct JSGCSetting
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{
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mozilla::Maybe<JSGCParamKey> key;
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uint32_t value;
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JSGCSetting()
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: key(), value(0)
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{ }
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};
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// There are several settings that we know we need so it makes sense to
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// preallocate here.
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typedef JSGCSetting JSGCSettingsArray[kGCSettingsArraySize];
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// Settings that change based on chrome/content context.
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struct JSContentChromeSettings
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{
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JS::RealmOptions realmOptions;
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int32_t maxScriptRuntime;
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JSContentChromeSettings()
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: realmOptions(), maxScriptRuntime(0)
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{ }
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};
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JSContentChromeSettings chrome;
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JSContentChromeSettings content;
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JSGCSettingsArray gcSettings;
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JS::ContextOptions contextOptions;
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#ifdef JS_GC_ZEAL
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uint8_t gcZeal;
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uint32_t gcZealFrequency;
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#endif
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JSSettings()
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#ifdef JS_GC_ZEAL
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: gcZeal(0), gcZealFrequency(0)
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#endif
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{
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for (uint32_t index = 0; index < ArrayLength(gcSettings); index++) {
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new (gcSettings + index) JSGCSetting();
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}
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}
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bool
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ApplyGCSetting(JSGCParamKey aKey, uint32_t aValue)
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{
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JSSettings::JSGCSetting* firstEmptySetting = nullptr;
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JSSettings::JSGCSetting* foundSetting = nullptr;
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for (uint32_t index = 0; index < ArrayLength(gcSettings); index++) {
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JSSettings::JSGCSetting& setting = gcSettings[index];
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if (setting.key.isSome() && *setting.key == aKey) {
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foundSetting = &setting;
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break;
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}
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if (!firstEmptySetting && setting.key.isNothing()) {
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firstEmptySetting = &setting;
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}
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}
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if (aValue) {
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if (!foundSetting) {
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foundSetting = firstEmptySetting;
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if (!foundSetting) {
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NS_ERROR("Not enough space for this value!");
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return false;
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}
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}
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foundSetting->key = mozilla::Some(aKey);
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foundSetting->value = aValue;
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return true;
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}
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if (foundSetting) {
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foundSetting->key.reset();
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return true;
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}
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return false;
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}
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};
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} // workerinternals namespace
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} // dom namespace
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} // mozilla namespace
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#endif // mozilla_dom_workerinternals_JSSettings_h
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