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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/performance_manager/mechanisms/working_set_trimmer.h"
#include "base/no_destructor.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/performance_manager/mechanisms/working_set_trimmer_chromeos.h"
#endif
namespace performance_manager {
namespace mechanism {
namespace {
// The NoOpWorkingSetTrimmer provides an implementation of a working set trimmer
// that does nothing on unsupported platforms.
class NoOpWorkingSetTrimmer : public WorkingSetTrimmer {
public:
~NoOpWorkingSetTrimmer() override = default;
NoOpWorkingSetTrimmer() = default;
// WorkingSetTrimmer implementation:
bool PlatformSupportsWorkingSetTrim() override { return false; }
void TrimWorkingSet(const ProcessNode* node) override {}
};
} // namespace
WorkingSetTrimmer* WorkingSetTrimmer::GetInstance() {
#if BUILDFLAG(IS_CHROMEOS)
static base::NoDestructor<WorkingSetTrimmerChromeOS> trimmer;
#else
static base::NoDestructor<NoOpWorkingSetTrimmer> trimmer;
#endif
return trimmer.get();
}
} // namespace mechanism
} // namespace performance_manager
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