blob: 1aee486def997278fb8d00e2b1c21fa32d29ab46 [file] [log] [blame]
/*
* Copyright (C) 2015 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.
*/
#include "config.h"
#include <wtf/MemoryPressureHandler.h>
#include <psapi.h>
#include <wtf/NeverDestroyed.h>
namespace WTF {
void MemoryPressureHandler::platformInitialize()
{
m_lowMemoryHandle = CreateMemoryResourceNotification(LowMemoryResourceNotification);
}
void MemoryPressureHandler::windowsMeasurementTimerFired()
{
setUnderMemoryPressure(false);
BOOL memoryLow;
if (QueryMemoryResourceNotification(m_lowMemoryHandle.get(), &memoryLow) && memoryLow) {
setUnderMemoryPressure(true);
releaseMemory(Critical::Yes);
return;
}
#if CPU(X86)
PROCESS_MEMORY_COUNTERS_EX counters;
if (!GetProcessMemoryInfo(GetCurrentProcess(), reinterpret_cast<PROCESS_MEMORY_COUNTERS*>(&counters), sizeof(counters)))
return;
// On Windows, 32-bit processes have 2GB of memory available, where some is used by the system.
// Debugging has shown that allocations might fail and cause crashes when memory usage is > ~1GB.
// We should start releasing memory before we reach 1GB.
const int maxMemoryUsageBytes = 0.9 * 1024 * 1024 * 1024;
if (counters.PrivateUsage > maxMemoryUsageBytes) {
setUnderMemoryPressure(true);
releaseMemory(Critical::Yes);
}
#endif
}
void MemoryPressureHandler::platformReleaseMemory(Critical)
{
}
void MemoryPressureHandler::install()
{
m_installed = true;
m_windowsMeasurementTimer.startRepeating(60_s);
}
void MemoryPressureHandler::uninstall()
{
if (!m_installed)
return;
m_windowsMeasurementTimer.stop();
m_installed = false;
}
void MemoryPressureHandler::holdOff(Seconds seconds)
{
}
void MemoryPressureHandler::respondToMemoryPressure(Critical critical, Synchronous synchronous)
{
uninstall();
releaseMemory(critical, synchronous);
}
Optional<MemoryPressureHandler::ReliefLogger::MemoryUsage> MemoryPressureHandler::ReliefLogger::platformMemoryUsage()
{
return WTF::nullopt;
}
} // namespace WTF