95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
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/*
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* Copyright 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <binder/IProcessInfoService.h>
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#include <binder/Parcel.h>
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#include <utils/Errors.h>
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#include <sys/types.h>
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namespace android {
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// ----------------------------------------------------------------------
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class BpProcessInfoService : public BpInterface<IProcessInfoService> {
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public:
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BpProcessInfoService(const sp<IBinder>& impl)
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: BpInterface<IProcessInfoService>(impl) {}
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virtual status_t getProcessStatesFromPids(size_t length, /*in*/ int32_t* pids,
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/*out*/ int32_t* states)
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{
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Parcel data, reply;
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data.writeInterfaceToken(IProcessInfoService::getInterfaceDescriptor());
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data.writeInt32Array(length, pids);
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data.writeInt32(length); // write length of output array, used by java AIDL stubs
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status_t err = remote()->transact(GET_PROCESS_STATES_FROM_PIDS, data, &reply);
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if (err != NO_ERROR || ((err = reply.readExceptionCode()) != NO_ERROR)) {
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return err;
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}
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int32_t replyLen = reply.readInt32();
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if (static_cast<size_t>(replyLen) != length) {
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return NOT_ENOUGH_DATA;
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}
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if (replyLen > 0 && (err = reply.read(states, length * sizeof(*states))) != NO_ERROR) {
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return err;
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}
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return reply.readInt32();
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}
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};
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IMPLEMENT_META_INTERFACE(ProcessInfoService, "android.os.IProcessInfoService");
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// ----------------------------------------------------------------------
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status_t BnProcessInfoService::onTransact( uint32_t code, const Parcel& data, Parcel* reply,
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uint32_t flags) {
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switch(code) {
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case GET_PROCESS_STATES_FROM_PIDS: {
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CHECK_INTERFACE(IProcessInfoService, data, reply);
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int32_t arrayLen = data.readInt32();
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if (arrayLen <= 0) {
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reply->writeNoException();
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reply->writeInt32(0);
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reply->writeInt32(NOT_ENOUGH_DATA);
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return NO_ERROR;
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}
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size_t len = static_cast<size_t>(arrayLen);
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int32_t pids[len];
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status_t res = data.read(pids, len * sizeof(*pids));
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// Ignore output array length returned in the parcel here, as the states array must
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// always be the same length as the input PIDs array.
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int32_t states[len];
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for (size_t i = 0; i < len; i++) states[i] = -1;
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if (res == NO_ERROR) {
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res = getProcessStatesFromPids(len, /*in*/ pids, /*out*/ states);
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}
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reply->writeNoException();
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reply->writeInt32Array(len, states);
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reply->writeInt32(res);
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return NO_ERROR;
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} break;
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default:
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return BBinder::onTransact(code, data, reply, flags);
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}
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}
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// ----------------------------------------------------------------------
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}; // namespace android
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