| /* |
| * Copyright (C) 2017 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "BPlatform.h" |
| #include "StaticMutex.h" |
| #include <mutex> |
| |
| #if BOS(DARWIN) |
| #include <dispatch/dispatch.h> |
| #endif |
| |
| namespace bmalloc { |
| |
| // FIXME: This class should become a common scavenger mechanism for all heaps. |
| // https://bugs.webkit.org/show_bug.cgi?id=174973 |
| |
| class Scavenger { |
| public: |
| Scavenger(std::lock_guard<StaticMutex>&); |
| |
| ~Scavenger() = delete; |
| |
| void scavenge(); |
| |
| #if BOS(DARWIN) |
| void setScavengerThreadQOSClass(qos_class_t overrideClass) { m_requestedScavengerThreadQOSClass = overrideClass; } |
| qos_class_t requestedScavengerThreadQOSClass() const { return m_requestedScavengerThreadQOSClass; } |
| #endif |
| |
| private: |
| #if BOS(DARWIN) |
| dispatch_source_t m_pressureHandlerDispatchSource; |
| qos_class_t m_requestedScavengerThreadQOSClass { QOS_CLASS_USER_INITIATED }; |
| #endif |
| }; |
| |
| } // namespace bmalloc |
| |
| |
