Opencv 3.1 project on GR-PEACH board
Fork of gr-peach-opencv-project by
platform/CircularBuffer.h
- Committer:
- <>
- Date:
- 2016-10-28
- Revision:
- 149:156823d33999
- Child:
- 160:d5399cc887bb
File content as of revision 149:156823d33999:
/* mbed Microcontroller Library * Copyright (c) 2015 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef MBED_CIRCULARBUFFER_H #define MBED_CIRCULARBUFFER_H #include "platform/critical.h" namespace mbed { /** \addtogroup platform */ /** @{*/ /** Templated Circular buffer class * * @Note Synchronization level: Interrupt safe */ template<typename T, uint32_t BufferSize, typename CounterType = uint32_t> class CircularBuffer { public: CircularBuffer() : _head(0), _tail(0), _full(false) { } ~CircularBuffer() { } /** Push the transaction to the buffer. This overwrites the buffer if it's * full * * @param data Data to be pushed to the buffer */ void push(const T& data) { core_util_critical_section_enter(); if (full()) { _tail++; _tail %= BufferSize; } _pool[_head++] = data; _head %= BufferSize; if (_head == _tail) { _full = true; } core_util_critical_section_exit(); } /** Pop the transaction from the buffer * * @param data Data to be pushed to the buffer * @return True if the buffer is not empty and data contains a transaction, false otherwise */ bool pop(T& data) { bool data_popped = false; core_util_critical_section_enter(); if (!empty()) { data = _pool[_tail++]; _tail %= BufferSize; _full = false; data_popped = true; } core_util_critical_section_exit(); return data_popped; } /** Check if the buffer is empty * * @return True if the buffer is empty, false if not */ bool empty() { core_util_critical_section_enter(); bool is_empty = (_head == _tail) && !_full; core_util_critical_section_exit(); return is_empty; } /** Check if the buffer is full * * @return True if the buffer is full, false if not */ bool full() { core_util_critical_section_enter(); bool full = _full; core_util_critical_section_exit(); return full; } /** Reset the buffer * */ void reset() { core_util_critical_section_enter(); _head = 0; _tail = 0; _full = false; core_util_critical_section_exit(); } private: T _pool[BufferSize]; volatile CounterType _head; volatile CounterType _tail; volatile bool _full; }; } #endif /** @}*/