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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "FlagManager.h"
#include <SurfaceFlingerProperties.sysprop.h>
#include <android-base/parsebool.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <log/log.h>
#include <renderengine/RenderEngine.h>
#include <server_configurable_flags/get_flags.h>
#include <cinttypes>
namespace android {
static constexpr const char* kExperimentNamespace = "surface_flinger_native_boot";
std::unique_ptr<FlagManager> FlagManager::mInstance;
std::once_flag FlagManager::mOnce;
FlagManager::FlagManager(ConstructorTag) {}
FlagManager::~FlagManager() = default;
namespace {
std::optional<bool> parseBool(const char* str) {
base::ParseBoolResult parseResult = base::ParseBool(str);
switch (parseResult) {
case base::ParseBoolResult::kTrue:
return std::make_optional(true);
case base::ParseBoolResult::kFalse:
return std::make_optional(false);
case base::ParseBoolResult::kError:
return std::nullopt;
}
}
void dumpFlag(std::string& result, const char* name, std::function<bool()> getter) {
base::StringAppendF(&result, "%s: %s\n", name, getter() ? "true" : "false");
}
} // namespace
const FlagManager& FlagManager::getInstance() {
return getMutableInstance();
}
FlagManager& FlagManager::getMutableInstance() {
std::call_once(mOnce, [&] {
LOG_ALWAYS_FATAL_IF(mInstance, "Instance already created");
mInstance = std::make_unique<FlagManager>(ConstructorTag{});
});
return *mInstance;
}
void FlagManager::markBootCompleted() {
mBootCompleted = true;
}
void FlagManager::dump(std::string& result) const {
#define DUMP_FLAG(name) dumpFlag(result, #name, std::bind(&FlagManager::name, this));
base::StringAppendF(&result, "FlagManager values: \n");
DUMP_FLAG(use_adpf_cpu_hint);
DUMP_FLAG(use_skia_tracing);
#undef DUMP_FLAG
}
std::optional<bool> FlagManager::getBoolProperty(const char* property) const {
return parseBool(base::GetProperty(property, "").c_str());
}
bool FlagManager::getServerConfigurableFlag(const char* experimentFlagName) const {
const auto value = server_configurable_flags::GetServerConfigurableFlag(kExperimentNamespace,
experimentFlagName, "");
const auto res = parseBool(value.c_str());
return res.has_value() && res.value();
}
#define FLAG_MANAGER_SERVER_FLAG(name, syspropOverride, serverFlagName) \
bool FlagManager::name() const { \
LOG_ALWAYS_FATAL_IF(!mBootCompleted, \
"Can't read %s before boot completed as it is server writable", \
__func__); \
const auto debugOverride = getBoolProperty(syspropOverride); \
if (debugOverride.has_value()) return debugOverride.value(); \
return getServerConfigurableFlag(serverFlagName); \
}
FLAG_MANAGER_SERVER_FLAG(test_flag, "", "")
FLAG_MANAGER_SERVER_FLAG(use_adpf_cpu_hint, "debug.sf.enable_adpf_cpu_hint",
"AdpfFeature__adpf_cpu_hint")
FLAG_MANAGER_SERVER_FLAG(use_skia_tracing, PROPERTY_SKIA_ATRACE_ENABLED,
"SkiaTracingFeature__use_skia_tracing")
#undef FLAG_MANAGER_SERVER_FLAG
} // namespace android
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