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Merge "AIDL it! IServiceManager" into stage-aosp-master

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This commit is contained in:
Steven Moreland
2019-07-09 21:49:26 +00:00
committed by Android (Google) Code Review
parent b5b95de2cf e17de65051
commit 1c373c4361
2 changed files with 20 additions and 151 deletions
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87
core/java/android/os/IServiceManager.java
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@@ -1,87 +0,0 @@
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.os;
import android.annotation.UnsupportedAppUsage;
/**
* Basic interface for finding and publishing system services.
*
* An implementation of this interface is usually published as the
* global context object, which can be retrieved via
* BinderNative.getContextObject(). An easy way to retrieve this
* is with the static method BnServiceManager.getDefault().
*
* @hide
*/
public interface IServiceManager extends IInterface
{
/**
* Retrieve an existing service called @a name from the
* service manager. Blocks for a few seconds waiting for it to be
* published if it does not already exist.
*/
@UnsupportedAppUsage
IBinder getService(String name) throws RemoteException;
/**
* Retrieve an existing service called @a name from the
* service manager. Non-blocking.
*/
@UnsupportedAppUsage
IBinder checkService(String name) throws RemoteException;
/**
* Place a new @a service called @a name into the service
* manager.
*/
void addService(String name, IBinder service, boolean allowIsolated, int dumpFlags)
throws RemoteException;
/**
* Return a list of all currently running services.
*/
String[] listServices(int dumpFlags) throws RemoteException;
static final String descriptor = "android.os.IServiceManager";
int GET_SERVICE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION;
int CHECK_SERVICE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+1;
int ADD_SERVICE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+2;
int LIST_SERVICES_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+3;
int CHECK_SERVICES_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+4;
int SET_PERMISSION_CONTROLLER_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+5;
/*
* Must update values in IServiceManager.h
*/
/* Allows services to dump sections according to priorities. */
int DUMP_FLAG_PRIORITY_CRITICAL = 1 << 0;
int DUMP_FLAG_PRIORITY_HIGH = 1 << 1;
int DUMP_FLAG_PRIORITY_NORMAL = 1 << 2;
/**
* Services are by default registered with a DEFAULT dump priority. DEFAULT priority has the
* same priority as NORMAL priority but the services are not called with dump priority
* arguments.
*/
int DUMP_FLAG_PRIORITY_DEFAULT = 1 << 3;
int DUMP_FLAG_PRIORITY_ALL = DUMP_FLAG_PRIORITY_CRITICAL | DUMP_FLAG_PRIORITY_HIGH
| DUMP_FLAG_PRIORITY_NORMAL | DUMP_FLAG_PRIORITY_DEFAULT;
/* Allows services to dump sections in protobuf format. */
int DUMP_FLAG_PROTO = 1 << 4;
}

84
core/java/android/os/ServiceManagerNative.java
View File

@@ -18,8 +18,6 @@ package android.os;
import android.annotation.UnsupportedAppUsage;
import java.util.ArrayList;
/**
* Native implementation of the service manager. Most clients will only
* care about asInterface().
@@ -32,26 +30,27 @@ public final class ServiceManagerNative {
/**
* Cast a Binder object into a service manager interface, generating
* a proxy if needed.
*
* TODO: delete this method and have clients use
* IServiceManager.Stub.asInterface instead
*/
@UnsupportedAppUsage
static public IServiceManager asInterface(IBinder obj)
{
public static IServiceManager asInterface(IBinder obj) {
if (obj == null) {
return null;
}
IServiceManager in =
(IServiceManager) obj.queryLocalInterface(IServiceManager.descriptor);
if (in != null) {
return in;
}
// ServiceManager is never local
return new ServiceManagerProxy(obj);
}
}
// This class should be deleted and replaced with IServiceManager.Stub whenever
// mRemote is no longer used
class ServiceManagerProxy implements IServiceManager {
public ServiceManagerProxy(IBinder remote) {
mRemote = remote;
mServiceManager = IServiceManager.Stub.asInterface(remote);
}
public IBinder asBinder() {
@@ -60,73 +59,30 @@ class ServiceManagerProxy implements IServiceManager {
@UnsupportedAppUsage
public IBinder getService(String name) throws RemoteException {
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
data.writeInterfaceToken(IServiceManager.descriptor);
data.writeString(name);
mRemote.transact(GET_SERVICE_TRANSACTION, data, reply, 0);
IBinder binder = reply.readStrongBinder();
reply.recycle();
data.recycle();
return binder;
// Same as checkService (old versions of servicemanager had both methods).
return mServiceManager.checkService(name);
}
public IBinder checkService(String name) throws RemoteException {
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
data.writeInterfaceToken(IServiceManager.descriptor);
data.writeString(name);
mRemote.transact(CHECK_SERVICE_TRANSACTION, data, reply, 0);
IBinder binder = reply.readStrongBinder();
reply.recycle();
data.recycle();
return binder;
return mServiceManager.checkService(name);
}
public void addService(String name, IBinder service, boolean allowIsolated, int dumpPriority)
throws RemoteException {
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
data.writeInterfaceToken(IServiceManager.descriptor);
data.writeString(name);
data.writeStrongBinder(service);
data.writeInt(allowIsolated ? 1 : 0);
data.writeInt(dumpPriority);
mRemote.transact(ADD_SERVICE_TRANSACTION, data, reply, 0);
reply.recycle();
data.recycle();
mServiceManager.addService(name, service, allowIsolated, dumpPriority);
}
public String[] listServices(int dumpPriority) throws RemoteException {
ArrayList<String> services = new ArrayList<String>();
int n = 0;
while (true) {
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
data.writeInterfaceToken(IServiceManager.descriptor);
data.writeInt(n);
data.writeInt(dumpPriority);
n++;
try {
boolean res = mRemote.transact(LIST_SERVICES_TRANSACTION, data, reply, 0);
if (!res) {
break;
}
} catch (RuntimeException e) {
// The result code that is returned by the C++ code can
// cause the call to throw an exception back instead of
// returning a nice result... so eat it here and go on.
break;
}
services.add(reply.readString());
reply.recycle();
data.recycle();
}
String[] array = new String[services.size()];
services.toArray(array);
return array;
return mServiceManager.listServices(dumpPriority);
}
/**
* Same as mServiceManager but used by apps.
*
* Once this can be removed, ServiceManagerProxy should be removed entirely.
*/
@UnsupportedAppUsage
private IBinder mRemote;
private IServiceManager mServiceManager;
}