Home | History | Annotate | Download | only in binder 
      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     static  void                setSingleProcess(bool singleProcess);
     43 
     44             void                setContextObject(const sp<IBinder>& object);
     45             sp<IBinder>         getContextObject(const sp<IBinder>& caller);
     46 
     47             void                setContextObject(const sp<IBinder>& object,
     48                                                  const String16& name);
     49             sp<IBinder>         getContextObject(const String16& name,
     50                                                  const sp<IBinder>& caller);
     51 
     52             bool                supportsProcesses() const;
     53 
     54             void                startThreadPool();
     55 
     56     typedef bool (*context_check_func)(const String16& name,
     57                                        const sp<IBinder>& caller,
     58                                        void* userData);
     59 
     60             bool                isContextManager(void) const;
     61             bool                becomeContextManager(
     62                                     context_check_func checkFunc,
     63                                     void* userData);
     64 
     65             sp<IBinder>         getStrongProxyForHandle(int32_t handle);
     66             wp<IBinder>         getWeakProxyForHandle(int32_t handle);
     67             void                expungeHandle(int32_t handle, IBinder* binder);
     68 
     69             void                setArgs(int argc, const char* const argv[]);
     70             int                 getArgC() const;
     71             const char* const*  getArgV() const;
     72 
     73             void                setArgV0(const char* txt);
     74 
     75             void                spawnPooledThread(bool isMain);
     76 
     77 private:
     78     friend class IPCThreadState;
     79 
     80                                 ProcessState();
     81                                 ~ProcessState();
     82 
     83                                 ProcessState(const ProcessState& o);
     84             ProcessState&       operator=(const ProcessState& o);
     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