| /* |
| * Copyright (C) 2018 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.frameworks.bufferhub@1.0; |
| |
| interface IBufferClient { |
| /** |
| * Creates a token that could be used for IBufferHub::import function later. |
| * |
| * @return token A per-boot-unique token in handle format. The content of |
| * token is opaque and implementation defined. Could be used for create |
| * another IBufferClient via IBufferHub::import function. |
| * @return status The result of this operation. NO_ERROR on success, |
| * error codes on failure. |
| */ |
| duplicate() generates (handle token, BufferHubStatus status); |
| |
| /** |
| * Closes this client. |
| * |
| * All further function calls must return CLIENT_CLOSED. All the unused |
| * tokens generated by this client via IBufferClient::duplicate must become |
| * invalid, and try to use them for import will return INVALID_TOKEN. |
| * |
| * Calling close must immediately free the underlying buffers if they are |
| * only used by this client, but the client must also be freed after |
| * calling this method. |
| * |
| * User may manually call this function to avoid race condition caused by |
| * asynchronous destructors. |
| * |
| * @return status The result of this operation. NO_ERROR on success, |
| * error codes on failure. |
| */ |
| close() generates (BufferHubStatus status); |
| }; |