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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/allocator/miracle_parameter.h"
#include "base/command_line.h"
#include "base/strings/strcat.h"
#include "base/system/sys_info.h"
namespace base::miracle_parameter {
std::string GetParamNameWithSuffix(const std::string& param_name) {
// `base::SysInfo::AmountOfPhysicalMemoryMB()` refers to CommandLine
// internally. If the CommandLine is not initialized, we return early to avoid
// a crash.
if (!base::CommandLine::InitializedForCurrentProcess()) {
return param_name;
}
int physical_memory_mb = base::SysInfo::AmountOfPhysicalMemoryMB();
const char* suffix =
physical_memory_mb < kMiracleParameterMemory512MB ? "ForLessThan512MB"
: physical_memory_mb < kMiracleParameterMemory1GB ? "For512MBTo1GB"
: physical_memory_mb < kMiracleParameterMemory2GB ? "For1GBTo2GB"
: physical_memory_mb < kMiracleParameterMemory4GB ? "For2GBTo4GB"
: physical_memory_mb < kMiracleParameterMemory8GB ? "For4GBTo8GB"
: physical_memory_mb < kMiracleParameterMemory16GB ? "For8GBTo16GB"
: "For16GBAndAbove";
return base::StrCat({param_name, suffix});
}
std::string GetMiracleParameterAsString(const base::Feature& feature,
const std::string& param_name,
const std::string& default_value) {
return GetFieldTrialParamByFeatureAsString(
feature, GetParamNameWithSuffix(param_name),
GetFieldTrialParamByFeatureAsString(feature, param_name, default_value));
}
double GetMiracleParameterAsDouble(const base::Feature& feature,
const std::string& param_name,
double default_value) {
return base::GetFieldTrialParamByFeatureAsDouble(
feature, GetParamNameWithSuffix(param_name),
base::GetFieldTrialParamByFeatureAsDouble(feature, param_name,
default_value));
}
int GetMiracleParameterAsInt(const base::Feature& feature,
const std::string& param_name,
int default_value) {
return base::GetFieldTrialParamByFeatureAsInt(
feature, GetParamNameWithSuffix(param_name),
base::GetFieldTrialParamByFeatureAsInt(feature, param_name,
default_value));
}
bool GetMiracleParameterAsBool(const base::Feature& feature,
const std::string& param_name,
bool default_value) {
return base::GetFieldTrialParamByFeatureAsBool(
feature, GetParamNameWithSuffix(param_name),
base::GetFieldTrialParamByFeatureAsBool(feature, param_name,
default_value));
}
base::TimeDelta GetMiracleParameterAsTimeDelta(const base::Feature& feature,
const std::string& param_name,
base::TimeDelta default_value) {
return base::GetFieldTrialParamByFeatureAsTimeDelta(
feature, GetParamNameWithSuffix(param_name),
base::GetFieldTrialParamByFeatureAsTimeDelta(feature, param_name,
default_value));
}
} // namespace base::miracle_parameter
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