system_init.cpp revision 54b6cfa9a9e5b861a9930af873580d6dc20f773c 
1/*
2 * System server main initialization.
3 *
4 * The system server is responsible for becoming the Binder
5 * context manager, supplying the root ServiceManager object
6 * through which other services can be found.
7 */
8
9#define LOG_TAG "sysproc"
10
11#include <utils/IPCThreadState.h>
12#include <utils/ProcessState.h>
13#include <utils/IServiceManager.h>
14#include <utils/TextOutput.h>
15#include <utils/Log.h>
16
17#include <SurfaceFlinger.h>
18#include <AudioFlinger.h>
19#include <CameraService.h>
20#include <MediaPlayerService.h>
21
22#include <android_runtime/AndroidRuntime.h>
23
24#include <signal.h>
25#include <stdlib.h>
26#include <stdio.h>
27#include <unistd.h>
28#include <sys/time.h>
29#include <cutils/properties.h>
30
31using namespace android;
32
33namespace android {
34/**
35 * This class is used to kill this process when the runtime dies.
36 */
37class GrimReaper : public IBinder::DeathRecipient {
38public:
39    GrimReaper() { }
40
41    virtual void binderDied(const wp<IBinder>& who)
42    {
43        LOGI("Grim Reaper killing system_server...");
44        kill(getpid(), SIGKILL);
45    }
46};
47
48} // namespace android
49
50
51
52extern "C" status_t system_init()
53{
54    LOGI("Entered system_init()");
55
56    sp<ProcessState> proc(ProcessState::self());
57
58    sp<IServiceManager> sm = defaultServiceManager();
59    LOGI("ServiceManager: %p\n", sm.get());
60
61    sp<GrimReaper> grim = new GrimReaper();
62    sm->asBinder()->linkToDeath(grim, grim.get(), 0);
63
64    char propBuf[PROPERTY_VALUE_MAX];
65    property_get("system_init.startsurfaceflinger", propBuf, "1");
66    if (strcmp(propBuf, "1") == 0) {
67        // Start the SurfaceFlinger
68        SurfaceFlinger::instantiate();
69    }
70
71    // On the simulator, audioflinger et al don't get started the
72    // same way as on the device, and we need to start them here
73    if (!proc->supportsProcesses()) {
74
75        // Start the AudioFlinger
76        AudioFlinger::instantiate();
77
78        // Start the media playback service
79        MediaPlayerService::instantiate();
80
81        // Start the camera service
82        CameraService::instantiate();
83    }
84
85    // And now start the Android runtime.  We have to do this bit
86    // of nastiness because the Android runtime initialization requires
87    // some of the core system services to already be started.
88    // All other servers should just start the Android runtime at
89    // the beginning of their processes's main(), before calling
90    // the init function.
91    LOGI("System server: starting Android runtime.\n");
92
93    AndroidRuntime* runtime = AndroidRuntime::getRuntime();
94
95    LOGI("System server: starting Android services.\n");
96    runtime->callStatic("com/android/server/SystemServer", "init2");
97
98    // If running in our own process, just go into the thread
99    // pool.  Otherwise, call the initialization finished
100    // func to let this process continue its initilization.
101    if (proc->supportsProcesses()) {
102        LOGI("System server: entering thread pool.\n");
103        ProcessState::self()->startThreadPool();
104        IPCThreadState::self()->joinThreadPool();
105        LOGI("System server: exiting thread pool.\n");
106    }
107    return NO_ERROR;
108}
109
110