]>
git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/USBHost/USBHostSerial/MtxCircBuffer.h
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
;