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/*
* Copyright 2015 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.
*/
#include <binder/IProcessInfoService.h>
#include <binder/Parcel.h>
#include <utils/Errors.h>
#include <sys/types.h>
namespace android {
// ----------------------------------------------------------------------
class BpProcessInfoService : public BpInterface<IProcessInfoService> {
public:
BpProcessInfoService(const sp<IBinder>& impl)
: BpInterface<IProcessInfoService>(impl) {}
virtual status_t getProcessStatesFromPids(size_t length, /*in*/ int32_t* pids,
/*out*/ int32_t* states)
{
Parcel data, reply;
data.writeInterfaceToken(IProcessInfoService::getInterfaceDescriptor());
data.writeInt32Array(length, pids);
data.writeInt32(length); // write length of output array, used by java AIDL stubs
status_t err = remote()->transact(GET_PROCESS_STATES_FROM_PIDS, data, &reply);
if (err != NO_ERROR || ((err = reply.readExceptionCode()) != NO_ERROR)) {
return err;
}
int32_t replyLen = reply.readInt32();
if (static_cast<size_t>(replyLen) != length) {
return NOT_ENOUGH_DATA;
}
if (replyLen > 0 && (err = reply.read(states, length * sizeof(*states))) != NO_ERROR) {
return err;
}
return reply.readInt32();
}
};
IMPLEMENT_META_INTERFACE(ProcessInfoService, "android.os.IProcessInfoService");
// ----------------------------------------------------------------------
status_t BnProcessInfoService::onTransact( uint32_t code, const Parcel& data, Parcel* reply,
uint32_t flags) {
switch(code) {
case GET_PROCESS_STATES_FROM_PIDS: {
CHECK_INTERFACE(IProcessInfoService, data, reply);
int32_t arrayLen = data.readInt32();
if (arrayLen <= 0) {
reply->writeNoException();
reply->writeInt32(0);
reply->writeInt32(NOT_ENOUGH_DATA);
return NO_ERROR;
}
size_t len = static_cast<size_t>(arrayLen);
int32_t pids[len];
status_t res = data.read(pids, len * sizeof(*pids));
// Ignore output array length returned in the parcel here, as the states array must
// always be the same length as the input PIDs array.
int32_t states[len];
for (size_t i = 0; i < len; i++) states[i] = -1;
if (res == NO_ERROR) {
res = getProcessStatesFromPids(len, /*in*/ pids, /*out*/ states);
}
reply->writeNoException();
reply->writeInt32Array(len, states);
reply->writeInt32(res);
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
// ----------------------------------------------------------------------
}; // namespace android
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