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/*
* Copyright (C) 2016 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 "kdbinder.ProcessState"
#include <private/binder/Static.h>
#include <binder/ProcessState.h>
#include <binder/IPCThreadState.h>
#include <utils/String8.h>
#include <utils/Thread.h>
#include <string>
namespace android {
class PoolThread : public Thread {
public:
explicit PoolThread(bool isMain) : mIsMain(isMain) {}
protected:
bool threadLoop() override {
IPCThreadState::self()->joinThreadPool(mIsMain);
return false;
}
private:
const bool mIsMain;
};
ProcessState::ProcessState() : mThreadPoolStarted(false) {}
sp<ProcessState> ProcessState::self() {
Mutex::Autolock _l(gProcessMutex);
if (gProcess != NULL) {
return gProcess;
}
gProcess = new ProcessState;
return gProcess;
}
void ProcessState::startThreadPool() {
AutoMutex _l(mLock);
if (!mThreadPoolStarted) {
mThreadPoolStarted = true;
for (int i = 0; i < kThreadNum; i++) {
spawnPooledThread(true);
}
}
}
void ProcessState::spawnPooledThread(bool isMain) {
if (mThreadPoolStarted) {
sp<Thread> pooled_thread = new PoolThread(isMain);
ALOGV("Spawning new pooled thread.\n");
pooled_thread->run("pooled-thread");
}
}
sp<IBinder> ProcessState::getStrongProxyForHandle(int32_t /*handle*/) {
// TODO: unimplemented.
return NULL;
}
status_t ProcessState::setThreadPoolMaxThreadCount(size_t /*maxThreads*/) {
// TODO: unimplemented.
return NO_ERROR;
}
int32_t ProcessState::registerService(sp<IBinder> binder, String16 name) {
// Create a new connection for the Binder object.
auto connection_for_binder = kdbus::Connection::hello(
"0-services",
String8(name).string());
// Give it a well-known name. This will allow it to be discovered by
// other processes.
connection_for_binder->acquire_name(std::string(String8(name).string()));
int32_t handle = connection_for_binder->id;
// Add the service to the table.
{
AutoMutex _l(mServiceLock);
mServiceTable.emplace_back(std::move(connection_for_binder), binder);
}
return handle;
}
int32_t ProcessState::registerBinder(sp<IBinder> binder) {
auto connection_for_binder = kdbus::Connection::hello(
"0-services",
"BBinder");
int32_t handle = connection_for_binder->id;
{
// add binder to table.
AutoMutex _l(mServiceLock);
mServiceTable.emplace_back(std::move(connection_for_binder), binder);
}
return handle;
}
int32_t ProcessState::getHandleForBinder(sp<IBinder> binder) {
IBinder *local = binder->localBinder();
if (local) {
auto it = std::find_if(mServiceTable.cbegin(),
mServiceTable.cend(),
[&binder](const struct binder_entry& entry) {
return entry.binder == binder;
});
if (it == mServiceTable.cend()) {
return registerBinder(binder);
} else {
return it->connection->id;
}
} else {
BpBinder *remote = binder->remoteBinder();
return remote->handle();
}
}
sp<IBinder> ProcessState::getBinderForHandle(int32_t handle) {
auto it = std::find_if(mServiceTable.cbegin(),
mServiceTable.cend(),
[&handle](const struct binder_entry& entry) {
return entry.connection->id == (uint64_t) handle;
});
if (it != mServiceTable.cend()) {
return it->binder;
} else {
return new BpBinder(handle);
}
}
} // namespace android
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