1 /* 2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de> 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, 8 * merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #ifndef __PACKET_QUEUE_H 26 #define __PACKET_QUEUE_H 27 28 #include <OS.h> 29 30 class Packet; 31 32 class PacketQueue 33 { 34 public: 35 PacketQueue(int max_packets = 5); 36 ~PacketQueue(); 37 38 status_t Insert(Packet *packet); 39 status_t Remove(Packet **packet); 40 41 // peeks into queue and delivers a copy 42 status_t Peek(Packet **packet); 43 44 void Flush(bigtime_t timeout); 45 46 void Terminate(); 47 void Restart(); 48 49 private: 50 void Empty(); 51 52 // not implemented 53 PacketQueue(const PacketQueue & clone); 54 PacketQueue & operator=(PacketQueue & clone); 55 56 private: 57 58 Packet **fQueue; 59 sem_id fSem; 60 volatile bool fTerminate; 61 62 int fWriteIndex; 63 int fReadIndex; 64 int fMaxPackets; 65 int32 fPacketCount; 66 }; 67 68 69 #endif 70