1 /* 2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 struct mkuz_fifo_queue { 28 pthread_mutex_t mtx; 29 pthread_cond_t cvar; 30 struct mkuz_bchain_link *first; 31 struct mkuz_bchain_link *last; 32 int length; 33 int wakeup_len; 34 }; 35 36 struct mkuz_blk; 37 struct mkuz_bchain_link; 38 39 DEFINE_RAW_METHOD(cmp_cb, int, const struct mkuz_blk *, void *); 40 41 struct mkuz_fifo_queue *mkuz_fqueue_ctor(int); 42 void mkuz_fqueue_enq(struct mkuz_fifo_queue *, struct mkuz_blk *); 43 struct mkuz_blk *mkuz_fqueue_deq(struct mkuz_fifo_queue *); 44 struct mkuz_blk *mkuz_fqueue_deq_when(struct mkuz_fifo_queue *, cmp_cb_t, void *); 45 #if defined(NOTYET) 46 struct mkuz_bchain_link *mkuz_fqueue_deq_all(struct mkuz_fifo_queue *, int *); 47 int mkuz_fqueue_enq_all(struct mkuz_fifo_queue *, struct mkuz_bchain_link *, 48 struct mkuz_bchain_link *, int); 49 #endif 50