Android下rtc驱动调用流程

首先在./frameworks/base/core/java/android/app/目录下找到IAlarmManager.aidl

内容如下：

interfaceIAlarmManager {
    void set(int type, longtriggerAtTime, in PendingIntent operation);
   void setRepeating(int type, long triggerAtTime, long interval, inPendingIntent operation);
    voidsetInexactRepeating(int type, long triggerAtTime, long interval, inPendingIntent operation);
    void setTime(longmillis);
    void setTimeZone(String zone);
   void remove(in PendingIntent operation);
    voidcancelPoweroffAlarm(String name);
    booleanbootFromPoweroffAlarm();
}

函数的具体实现在./frameworks/base/core/java/android/app/目录下的·AlarmManager.java文件中，

部分内容如下：

publicvoid set(int type, long triggerAtMillis, PendingIntent operation){
        try {
           mService.set(type, triggerAtMillis, operation);
       } catch (RemoteException ex) {
       }
}
mService.set(type,triggerAtMillis,operation);函数实现文件为：frameworks/base/services/java/com/android/server/AlarmManagerService.java

部分内容如下：

publicvoid set(int type, long triggerAtTime, PendingIntent operation) {

}

privateclass AlarmThread extends Thread {

。。。。。。
。。。。。。
intresult = waitForAlarm(mDescriptor);

。。。。。。

}

privateclass AlarmThread extends Thread {
       public AlarmThread() {
private class AlarmThread extendsThread {
        publicAlarmThread() {
private class AlarmThread extends Thread{
        public AlarmThread(){
而waitForAlarn的实现文件为：frameworks/base/services/jni/com_android_server_AlarmManagerService.cpp

部分内容为：

staticJNINativeMethod sMethods[] = {
     /* name,signature, funcPtr */
       {"init", "()I",(void*)android_server_AlarmManagerService_init},
       {"close", "(I)V",(void*)android_server_AlarmManagerService_close},
       {"set", "(IIJJ)V",(void*)android_server_AlarmManagerService_set},
   {"waitForAlarm", "(I)I",(void*)android_server_AlarmManagerService_waitForAlarm},
   {"setKernelTimezone", "(II)I",(void*)android_server_AlarmManagerService_setKernelTimezone},
   {"bootFromAlarm", "(I)Z",(void*)android_server_AlarmManagerService_bootFromAlarm},
};

也就在这个文件中直接对linux的rtc驱动接口进行了直接操作，再往下就进入linux驱动程序。

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