2 Copyright (C) 2000 Paul Barton-Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #ifndef __pbd_lockfree_fifo_h__
22 #define __pbd_lockfree_fifo_h__
24 #include <sys/types.h>
31 LockFreeFIFO (int sz) {
38 virtual ~LockFreeFIFO() {
44 if (pop_ptr == push_ptr) {
49 if (pop_ptr >= size) {
57 if (pop_ptr == push_ptr) {
66 if ((size_t) abs (static_cast<int>(push_ptr - pop_ptr)) < size) {
69 if (push_ptr >= size) {
80 volatile size_t push_ptr;
81 volatile size_t pop_ptr;
86 #endif /* __pbd_lockfree_fifo_h__ */