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/*
* Copyright (C) 2016, 2020 Igalia S.L.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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
#if OS(LINUX)
#include <wtf/NeverDestroyed.h>
#include <wtf/Noncopyable.h>
#include <wtf/text/CString.h>
namespace WebKit {
class MemoryPressureMonitor {
WTF_MAKE_NONCOPYABLE(MemoryPressureMonitor);
friend NeverDestroyed<MemoryPressureMonitor>;
public:
static MemoryPressureMonitor& singleton();
void start();
static bool disabled();
~MemoryPressureMonitor();
private:
MemoryPressureMonitor() = default;
bool m_started { false };
static bool s_disabled;
};
class CGroupMemoryController {
public:
CGroupMemoryController() = default;
bool isActive() { return !m_cgroupMemoryControllerPath.isNull(); };
void setMemoryControllerPath(CString);
size_t getMemoryTotalWithCgroup();
size_t getMemoryUsageWithCgroup();
~CGroupMemoryController()
{
disposeMemoryController();
}
private:
CString m_cgroupMemoryControllerPath;
FILE* m_cgroupMemoryMemswLimitInBytesFile { nullptr };
FILE* m_cgroupMemoryMemswUsageInBytesFile { nullptr };
FILE* m_cgroupMemoryLimitInBytesFile { nullptr };
FILE* m_cgroupMemoryUsageInBytesFile { nullptr };
FILE* m_cgroupV2MemoryMemswMaxFile { nullptr };
FILE* m_cgroupV2MemoryMaxFile { nullptr };
FILE* m_cgroupV2MemoryHighFile { nullptr };
FILE* m_cgroupV2MemoryCurrentFile { nullptr };
void disposeMemoryController();
size_t getCgroupFileValue(FILE*);
};
} // namespace WebKit
#endif // OS(LINUX)
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