105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <wtf/MemoryPressureHandler.h>
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#include <psapi.h>
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#include <wtf/NeverDestroyed.h>
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namespace WTF {
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void MemoryPressureHandler::platformInitialize()
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{
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m_lowMemoryHandle = CreateMemoryResourceNotification(LowMemoryResourceNotification);
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}
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void MemoryPressureHandler::windowsMeasurementTimerFired()
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{
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setUnderMemoryPressure(false);
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BOOL memoryLow;
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if (QueryMemoryResourceNotification(m_lowMemoryHandle.get(), &memoryLow) && memoryLow) {
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setUnderMemoryPressure(true);
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releaseMemory(Critical::Yes);
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return;
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}
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#if CPU(X86)
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PROCESS_MEMORY_COUNTERS_EX counters;
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if (!GetProcessMemoryInfo(GetCurrentProcess(), reinterpret_cast<PROCESS_MEMORY_COUNTERS*>(&counters), sizeof(counters)))
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return;
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// On Windows, 32-bit processes have 2GB of memory available, where some is used by the system.
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// Debugging has shown that allocations might fail and cause crashes when memory usage is > ~1GB.
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// We should start releasing memory before we reach 1GB.
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const int maxMemoryUsageBytes = 0.9 * 1024 * 1024 * 1024;
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if (counters.PrivateUsage > maxMemoryUsageBytes) {
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setUnderMemoryPressure(true);
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releaseMemory(Critical::Yes);
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}
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#endif
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}
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void MemoryPressureHandler::platformReleaseMemory(Critical)
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{
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}
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void MemoryPressureHandler::install()
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{
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m_installed = true;
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m_windowsMeasurementTimer.startRepeating(60_s);
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}
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void MemoryPressureHandler::uninstall()
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{
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if (!m_installed)
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return;
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m_windowsMeasurementTimer.stop();
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m_installed = false;
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}
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void MemoryPressureHandler::holdOff(Seconds seconds)
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{
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}
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void MemoryPressureHandler::respondToMemoryPressure(Critical critical, Synchronous synchronous)
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{
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uninstall();
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releaseMemory(critical, synchronous);
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}
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std::optional<MemoryPressureHandler::ReliefLogger::MemoryUsage> MemoryPressureHandler::ReliefLogger::platformMemoryUsage()
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{
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return std::nullopt;
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}
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} // namespace WTF
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