60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/*
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* Copyright (C) 2008 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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*
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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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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY 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 OF
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* 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 "SystemMemory.h"
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#if PLATFORM(IOS_FAMILY)
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#include <sys/sysctl.h>
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#include <wtf/Assertions.h>
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#include <wtf/WallTime.h>
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namespace WebCore {
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int systemMemoryLevel()
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{
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#if PLATFORM(IOS_FAMILY_SIMULATOR)
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return 35;
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#else
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static int memoryFreeLevel = -1;
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static WallTime previousCheckTime;
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WallTime time = WallTime::now();
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if (time - previousCheckTime < 100_ms)
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return memoryFreeLevel;
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previousCheckTime = time;
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size_t size = sizeof(memoryFreeLevel);
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sysctlbyname("kern.memorystatus_level", &memoryFreeLevel, &size, nullptr, 0);
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return memoryFreeLevel;
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#endif
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}
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} // namespace WebCore
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#endif // PLATFORM(IOS_FAMILY)
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