blob: 56ac84639ac82283d9bea52f60c44848ebcf0151 [file] [log] [blame]
/*
* Copyright (C) 2005 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.
*/
#ifndef ANDROID_HARDWARE_PROCESS_STATE_H
#define ANDROID_HARDWARE_PROCESS_STATE_H
#include <hwbinder/IBinder.h>
#include <utils/KeyedVector.h>
#include <utils/String8.h>
#include <utils/String16.h>
#include <utils/threads.h>
#include <pthread.h>
// WARNING: this code is part of libhwbinder, a fork of libbinder. Generally,
// this means that it is only relevant to HIDL. Any AIDL- or libbinder-specific
// code should not try to use these things.
// ---------------------------------------------------------------------------
namespace android {
namespace hardware {
class IPCThreadState;
class ProcessState : public virtual RefBase
{
public:
static sp<ProcessState> self();
static sp<ProcessState> selfOrNull();
// Note: don't call self() or selfOrNull() before initWithMmapSize()
// with '0' as an argument, this is the same as selfOrNull
static sp<ProcessState> initWithMmapSize(size_t mmapSize); // size in bytes
void startThreadPool();
sp<IBinder> getContextObject(const sp<IBinder>& /*caller*/);
// only call once, without creating a pool
void becomeContextManager();
sp<IBinder> getStrongProxyForHandle(int32_t handle);
wp<IBinder> getWeakProxyForHandle(int32_t handle);
void expungeHandle(int32_t handle, IBinder* binder);
void spawnPooledThread(bool isMain);
status_t setThreadPoolConfiguration(size_t maxThreads, bool callerJoinsPool);
status_t enableOnewaySpamDetection(bool enable);
size_t getMaxThreads();
void giveThreadPoolName();
ssize_t getKernelReferences(size_t count, uintptr_t* buf);
// This refcount includes:
// 1. Strong references to the node by this and other processes
// 2. Temporary strong references held by the kernel during a
// transaction on the node.
// It does NOT include local strong references to the node
ssize_t getStrongRefCountForNodeByHandle(int32_t handle);
size_t getMmapSize();
enum class CallRestriction {
// all calls okay
NONE,
// log when calls are blocking
ERROR_IF_NOT_ONEWAY,
// abort process on blocking calls
FATAL_IF_NOT_ONEWAY,
};
// Sets calling restrictions for all transactions in this process. This must be called
// before any threads are spawned.
void setCallRestriction(CallRestriction restriction);
private:
static sp<ProcessState> init(size_t mmapSize, bool requireMmapSize);
friend class IPCThreadState;
explicit ProcessState(size_t mmapSize);
~ProcessState();
ProcessState(const ProcessState& o);
ProcessState& operator=(const ProcessState& o);
String8 makeBinderThreadName();
struct handle_entry {
IBinder* binder;
RefBase::weakref_type* refs;
};
handle_entry* lookupHandleLocked(int32_t handle);
int mDriverFD;
void* mVMStart;
// Protects thread count variable below.
pthread_mutex_t mThreadCountLock;
// Number of binder threads current executing a command.
size_t mExecutingThreadsCount;
// Maximum number for binder threads allowed for this process.
size_t mMaxThreads;
// Time when thread pool was emptied
int64_t mStarvationStartTimeMs;
mutable Mutex mLock; // protects everything below.
Vector<handle_entry>mHandleToObject;
String8 mRootDir;
bool mThreadPoolStarted;
bool mSpawnThreadOnStart;
volatile int32_t mThreadPoolSeq;
const size_t mMmapSize;
CallRestriction mCallRestriction;
};
} // namespace hardware
} // namespace android
// ---------------------------------------------------------------------------
#endif // ANDROID_HARDWARE_PROCESS_STATE_H