1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * Copyright (C) 2016 Mopria Alliance, Inc. 4 * Copyright (C) 2013 Hewlett-Packard Development Company, L.P. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 #ifndef __WPRINT_MSGQ_H__ 19 #define __WPRINT_MSGQ_H__ 20 21 #include "wtypes.h" 22 23 #define WAIT_FOREVER -1 24 #define NO_WAIT 0 25 26 #define MSG_Q_FIFO 0 27 28 typedef void *msg_q_id; 29 30 #define MSG_Q_INVALID_ID ((msg_q_id)NULL) 31 32 /* 33 * Definitions corresponding to ifc_wprint_t interfaces 34 */ 35 36 msg_q_id msgQCreate(int max_msgs, int max_msg_length); 37 38 status_t msgQDelete(msg_q_id msgQ); 39 40 status_t msgQSend(msg_q_id msgQ, const char *buffer, unsigned long nbytes, int timeout, 41 int priority); 42 43 status_t msgQReceive(msg_q_id msgQ, char *buffer, unsigned long max_nbytes, int timeout); 44 45 int msgQNumMsgs(msg_q_id msgQ); 46 47 #endif // __WPRINT_MSGQ_H__