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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.
*/
#define LOG_TAG "PerfHint-jni"
#include "jni.h"
#include <dlfcn.h>
#include <nativehelper/JNIHelp.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <utils/Log.h>
#include <vector>
#include "core_jni_helpers.h"
namespace android {
namespace {
struct APerformanceHintManager;
struct APerformanceHintSession;
typedef APerformanceHintManager* (*APH_getManager)();
typedef APerformanceHintSession* (*APH_createSession)(APerformanceHintManager*, const int32_t*,
size_t, int64_t);
typedef int64_t (*APH_getPreferredUpdateRateNanos)(APerformanceHintManager* manager);
typedef void (*APH_updateTargetWorkDuration)(APerformanceHintSession*, int64_t);
typedef void (*APH_reportActualWorkDuration)(APerformanceHintSession*, int64_t);
typedef void (*APH_closeSession)(APerformanceHintSession* session);
bool gAPerformanceHintBindingInitialized = false;
APH_getManager gAPH_getManagerFn = nullptr;
APH_createSession gAPH_createSessionFn = nullptr;
APH_getPreferredUpdateRateNanos gAPH_getPreferredUpdateRateNanosFn = nullptr;
APH_updateTargetWorkDuration gAPH_updateTargetWorkDurationFn = nullptr;
APH_reportActualWorkDuration gAPH_reportActualWorkDurationFn = nullptr;
APH_closeSession gAPH_closeSessionFn = nullptr;
void ensureAPerformanceHintBindingInitialized() {
if (gAPerformanceHintBindingInitialized) return;
void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
LOG_ALWAYS_FATAL_IF(handle_ == nullptr, "Failed to dlopen libandroid.so!");
gAPH_getManagerFn = (APH_getManager)dlsym(handle_, "APerformanceHint_getManager");
LOG_ALWAYS_FATAL_IF(gAPH_getManagerFn == nullptr,
"Failed to find required symbol APerformanceHint_getManager!");
gAPH_createSessionFn = (APH_createSession)dlsym(handle_, "APerformanceHint_createSession");
LOG_ALWAYS_FATAL_IF(gAPH_createSessionFn == nullptr,
"Failed to find required symbol APerformanceHint_createSession!");
gAPH_getPreferredUpdateRateNanosFn =
(APH_getPreferredUpdateRateNanos)dlsym(handle_,
"APerformanceHint_getPreferredUpdateRateNanos");
LOG_ALWAYS_FATAL_IF(gAPH_getPreferredUpdateRateNanosFn == nullptr,
"Failed to find required symbol "
"APerformanceHint_getPreferredUpdateRateNanos!");
gAPH_updateTargetWorkDurationFn =
(APH_updateTargetWorkDuration)dlsym(handle_,
"APerformanceHint_updateTargetWorkDuration");
LOG_ALWAYS_FATAL_IF(gAPH_updateTargetWorkDurationFn == nullptr,
"Failed to find required symbol "
"APerformanceHint_updateTargetWorkDuration!");
gAPH_reportActualWorkDurationFn =
(APH_reportActualWorkDuration)dlsym(handle_,
"APerformanceHint_reportActualWorkDuration");
LOG_ALWAYS_FATAL_IF(gAPH_reportActualWorkDurationFn == nullptr,
"Failed to find required symbol "
"APerformanceHint_reportActualWorkDuration!");
gAPH_closeSessionFn = (APH_closeSession)dlsym(handle_, "APerformanceHint_closeSession");
LOG_ALWAYS_FATAL_IF(gAPH_closeSessionFn == nullptr,
"Failed to find required symbol APerformanceHint_closeSession!");
gAPerformanceHintBindingInitialized = true;
}
} // namespace
static jlong nativeAcquireManager(JNIEnv* env, jclass clazz) {
ensureAPerformanceHintBindingInitialized();
return reinterpret_cast<jlong>(gAPH_getManagerFn());
}
static jlong nativeGetPreferredUpdateRateNanos(JNIEnv* env, jclass clazz, jlong nativeManagerPtr) {
ensureAPerformanceHintBindingInitialized();
return gAPH_getPreferredUpdateRateNanosFn(
reinterpret_cast<APerformanceHintManager*>(nativeManagerPtr));
}
static jlong nativeCreateSession(JNIEnv* env, jclass clazz, jlong nativeManagerPtr, jintArray tids,
jlong initialTargetWorkDurationNanos) {
ensureAPerformanceHintBindingInitialized();
if (tids == nullptr) return 0;
std::vector<int32_t> tidsVector;
ScopedIntArrayRO tidsArray(env, tids);
for (size_t i = 0; i < tidsArray.size(); ++i) {
tidsVector.push_back(static_cast<int32_t>(tidsArray[i]));
}
return reinterpret_cast<jlong>(
gAPH_createSessionFn(reinterpret_cast<APerformanceHintManager*>(nativeManagerPtr),
tidsVector.data(), tidsVector.size(),
initialTargetWorkDurationNanos));
}
static void nativeUpdateTargetWorkDuration(JNIEnv* env, jclass clazz, jlong nativeSessionPtr,
jlong targetDurationNanos) {
ensureAPerformanceHintBindingInitialized();
gAPH_updateTargetWorkDurationFn(reinterpret_cast<APerformanceHintSession*>(nativeSessionPtr),
targetDurationNanos);
}
static void nativeReportActualWorkDuration(JNIEnv* env, jclass clazz, jlong nativeSessionPtr,
jlong actualDurationNanos) {
ensureAPerformanceHintBindingInitialized();
gAPH_reportActualWorkDurationFn(reinterpret_cast<APerformanceHintSession*>(nativeSessionPtr),
actualDurationNanos);
}
static void nativeCloseSession(JNIEnv* env, jclass clazz, jlong nativeSessionPtr) {
ensureAPerformanceHintBindingInitialized();
gAPH_closeSessionFn(reinterpret_cast<APerformanceHintSession*>(nativeSessionPtr));
}
static const JNINativeMethod gPerformanceHintMethods[] = {
{"nativeAcquireManager", "()J", (void*)nativeAcquireManager},
{"nativeGetPreferredUpdateRateNanos", "(J)J", (void*)nativeGetPreferredUpdateRateNanos},
{"nativeCreateSession", "(J[IJ)J", (void*)nativeCreateSession},
{"nativeUpdateTargetWorkDuration", "(JJ)V", (void*)nativeUpdateTargetWorkDuration},
{"nativeReportActualWorkDuration", "(JJ)V", (void*)nativeReportActualWorkDuration},
{"nativeCloseSession", "(J)V", (void*)nativeCloseSession},
};
int register_android_os_PerformanceHintManager(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/os/PerformanceHintManager", gPerformanceHintMethods,
NELEM(gPerformanceHintMethods));
}
} // namespace android
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