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      1 /*
      2  * Copyright (C) 2005 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_PROCESS_STATE_H
     18 #define ANDROID_PROCESS_STATE_H
     19 
     20 #include <binder/IBinder.h>
     21 #include <utils/KeyedVector.h>
     22 #include <utils/String8.h>
     23 #include <utils/String16.h>
     24 
     25 #include <utils/threads.h>
     26 
     27 // ---------------------------------------------------------------------------
     28 namespace android {
     29 
     30 class IPCThreadState;
     31 
     32 class ProcessState : public virtual RefBase
     33 {
     34 public:
     35     static  sp<ProcessState>    self();
     36 
     37             void                setContextObject(const sp<IBinder>& object);
     38             sp<IBinder>         getContextObject(const sp<IBinder>& caller);
     39 
     40             void                setContextObject(const sp<IBinder>& object,
     41                                                  const String16& name);
     42             sp<IBinder>         getContextObject(const String16& name,
     43                                                  const sp<IBinder>& caller);
     44 
     45             void                startThreadPool();
     46 
     47     typedef bool (*context_check_func)(const String16& name,
     48                                        const sp<IBinder>& caller,
     49                                        void* userData);
     50 
     51             bool                isContextManager(void) const;
     52             bool                becomeContextManager(
     53                                     context_check_func checkFunc,
     54                                     void* userData);
     55 
     56             sp<IBinder>         getStrongProxyForHandle(int32_t handle);
     57             wp<IBinder>         getWeakProxyForHandle(int32_t handle);
     58             void                expungeHandle(int32_t handle, IBinder* binder);
     59 
     60             void                spawnPooledThread(bool isMain);
     61 
     62             status_t            setThreadPoolMaxThreadCount(size_t maxThreads);
     63             void                giveThreadPoolName();
     64 
     65 private:
     66     friend class IPCThreadState;
     67 
     68                                 ProcessState();
     69                                 ~ProcessState();
     70 
     71                                 ProcessState(const ProcessState& o);
     72             ProcessState&       operator=(const ProcessState& o);
     73             String8             makeBinderThreadName();
     74 
     75             struct handle_entry {
     76                 IBinder* binder;
     77                 RefBase::weakref_type* refs;
     78             };
     79 
     80             handle_entry*       lookupHandleLocked(int32_t handle);
     81 
     82             int                 mDriverFD;
     83             void*               mVMStart;
     84 
     85     mutable Mutex               mLock;  // protects everything below.
     86 
     87             Vector<handle_entry>mHandleToObject;
     88 
     89             bool                mManagesContexts;
     90             context_check_func  mBinderContextCheckFunc;
     91             void*               mBinderContextUserData;
     92 
     93             KeyedVector<String16, sp<IBinder> >
     94                                 mContexts;
     95 
     96 
     97             String8             mRootDir;
     98             bool                mThreadPoolStarted;
     99     volatile int32_t            mThreadPoolSeq;
    100 };
    101 
    102 }; // namespace android
    103 
    104 // ---------------------------------------------------------------------------
    105 
    106 #endif // ANDROID_PROCESS_STATE_H
    107