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#include <pthread.h>
28
29// ---------------------------------------------------------------------------
30namespace android {
31
32class IPCThreadState;
33
34class ProcessState : public virtual RefBase
35{
36public:
37    static  sp<ProcessState>    self();
38
39            void                setContextObject(const sp<IBinder>& object);
40            sp<IBinder>         getContextObject(const sp<IBinder>& caller);
41
42            void                setContextObject(const sp<IBinder>& object,
43                                                 const String16& name);
44            sp<IBinder>         getContextObject(const String16& name,
45                                                 const sp<IBinder>& caller);
46
47            void                startThreadPool();
48
49    typedef bool (*context_check_func)(const String16& name,
50                                       const sp<IBinder>& caller,
51                                       void* userData);
52
53            bool                isContextManager(void) const;
54            bool                becomeContextManager(
55                                    context_check_func checkFunc,
56                                    void* userData);
57
58            sp<IBinder>         getStrongProxyForHandle(int32_t handle);
59            wp<IBinder>         getWeakProxyForHandle(int32_t handle);
60            void                expungeHandle(int32_t handle, IBinder* binder);
61
62            void                spawnPooledThread(bool isMain);
63
64            status_t            setThreadPoolMaxThreadCount(size_t maxThreads);
65            void                giveThreadPoolName();
66
67private:
68    friend class IPCThreadState;
69
70                                ProcessState();
71                                ~ProcessState();
72
73                                ProcessState(const ProcessState& o);
74            ProcessState&       operator=(const ProcessState& o);
75            String8             makeBinderThreadName();
76
77            struct handle_entry {
78                IBinder* binder;
79                RefBase::weakref_type* refs;
80            };
81
82            handle_entry*       lookupHandleLocked(int32_t handle);
83
84            int                 mDriverFD;
85            void*               mVMStart;
86
87            // Protects thread count variable below.
88            pthread_mutex_t     mThreadCountLock;
89            pthread_cond_t      mThreadCountDecrement;
90            // Number of binder threads current executing a command.
91            size_t              mExecutingThreadsCount;
92            // Maximum number for binder threads allowed for this process.
93            size_t              mMaxThreads;
94            // Time when thread pool was emptied
95            int64_t             mStarvationStartTimeMs;
96
97    mutable Mutex               mLock;  // protects everything below.
98
99            Vector<handle_entry>mHandleToObject;
100
101            bool                mManagesContexts;
102            context_check_func  mBinderContextCheckFunc;
103            void*               mBinderContextUserData;
104
105            KeyedVector<String16, sp<IBinder> >
106                                mContexts;
107
108
109            String8             mRootDir;
110            bool                mThreadPoolStarted;
111    volatile int32_t            mThreadPoolSeq;
112};
113
114}; // namespace android
115
116// ---------------------------------------------------------------------------
117
118#endif // ANDROID_PROCESS_STATE_H
119