1 /* mbed USBHost Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef MTXCIRCBUFFER_H
18 #define MTXCIRCBUFFER_H
23 //Mutex protected circular buffer
24 template<typename T, int size>
35 bool r = (((write + 1) % size) == read);
42 bool r = (read == write);
54 while (((write + 1) % size) == read) {
64 uint16_t available() {
66 uint16_t a = (write >= read) ? (write - read) : (size - read + write);
73 bool empty = (read == write);
83 volatile uint16_t write;
84 volatile uint16_t read;