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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 // Global variables
     31 extern int                 mArgC;
     32 extern const char* const*  mArgV;
     33 extern int                 mArgLen;
     34 
     35 class IPCThreadState;
     36 
     37 class ProcessState : public virtual RefBase
     38 {
     39 public:
     40     static  sp<ProcessState>    self();
     41 
     42             void                setContextObject(const sp<IBinder>& object);
     43             sp<IBinder>         getContextObject(const sp<IBinder>& caller);
     44 
     45             void                setContextObject(const sp<IBinder>& object,
     46                                                  const String16& name);
     47             sp<IBinder>         getContextObject(const String16& name,
     48                                                  const sp<IBinder>& caller);
     49 
     50             void                startThreadPool();
     51 
     52     typedef bool (*context_check_func)(const String16& name,
     53                                        const sp<IBinder>& caller,
     54                                        void* userData);
     55 
     56             bool                isContextManager(void) const;
     57             bool                becomeContextManager(
     58                                     context_check_func checkFunc,
     59                                     void* userData);
     60 
     61             sp<IBinder>         getStrongProxyForHandle(int32_t handle);
     62             wp<IBinder>         getWeakProxyForHandle(int32_t handle);
     63             void                expungeHandle(int32_t handle, IBinder* binder);
     64 
     65             void                setArgs(int argc, const char* const argv[]);
     66             int                 getArgC() const;
     67             const char* const*  getArgV() const;
     68 
     69             void                setArgV0(const char* txt);
     70 
     71             void                spawnPooledThread(bool isMain);
     72 
     73             status_t            setThreadPoolMaxThreadCount(size_t maxThreads);
     74             void                giveThreadPoolName();
     75 
     76 private:
     77     friend class IPCThreadState;
     78 
     79                                 ProcessState();
     80                                 ~ProcessState();
     81 
     82                                 ProcessState(const ProcessState& o);
     83             ProcessState&       operator=(const ProcessState& o);
     84             String8             makeBinderThreadName();
     85 
     86             struct handle_entry {
     87                 IBinder* binder;
     88                 RefBase::weakref_type* refs;
     89             };
     90 
     91             handle_entry*       lookupHandleLocked(int32_t handle);
     92 
     93             int                 mDriverFD;
     94             void*               mVMStart;
     95 
     96     mutable Mutex               mLock;  // protects everything below.
     97 
     98             Vector<handle_entry>mHandleToObject;
     99 
    100             bool                mManagesContexts;
    101             context_check_func  mBinderContextCheckFunc;
    102             void*               mBinderContextUserData;
    103 
    104             KeyedVector<String16, sp<IBinder> >
    105                                 mContexts;
    106 
    107 
    108             String8             mRootDir;
    109             bool                mThreadPoolStarted;
    110     volatile int32_t            mThreadPoolSeq;
    111 };
    112 
    113 }; // namespace android
    114 
    115 // ---------------------------------------------------------------------------
    116 
    117 #endif // ANDROID_PROCESS_STATE_H
    118