Buffer for general purpose use. Templated for most datatypes
Dependents: BufferedSoftSerial 09_PT1000 10_PT1000 11_PT1000 ... more
Example
#include "mbed.h" #include "Buffer.h" Buffer <char> buf; int main() { buf = 'a'; buf.put('b'); char *head = buf.head(); puts(head); char whats_in_there[2] = {0}; int pos = 0; while(buf.available()) { whats_in_there[pos++] = buf; } printf("%c %c\n", whats_in_there[0], whats_in_there[1]); buf.clear(); error("done\n\n\n"); }
Revision 6:89564915f2a7, committed 2016-03-07
- Comitter:
- sam_grove
- Date:
- Mon Mar 07 21:10:13 2016 +0000
- Parent:
- 5:7b754354b99c
- Commit message:
- Update class name to MyBuffer to avoid conflicting names with a class in the mbed library
Changed in this revision
diff -r 7b754354b99c -r 89564915f2a7 Buffer.cpp --- a/Buffer.cpp Wed Jan 07 18:34:56 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,76 +0,0 @@ - -/** - * @file Buffer.cpp - * @brief Software Buffer - Templated Ring Buffer for most data types - * @author sam grove - * @version 1.0 - * @see - * - * Copyright (c) 2013 - * - * 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. - */ - -#include "Buffer.h" - -template <class T> -Buffer<T>::Buffer(uint32_t size) -{ - _buf = new T [size]; - _size = size; - clear(); - - return; -} - -template <class T> -Buffer<T>::~Buffer() -{ - delete [] _buf; - - return; -} - -template <class T> -uint32_t Buffer<T>::getSize() -{ - return this->_size; -} - -template <class T> -void Buffer<T>::clear(void) -{ - _wloc = 0; - _rloc = 0; - memset(_buf, 0, _size); - - return; -} - -template <class T> -uint32_t Buffer<T>::peek(char c) -{ - return 1; -} - -// make the linker aware of some possible types -template class Buffer<uint8_t>; -template class Buffer<int8_t>; -template class Buffer<uint16_t>; -template class Buffer<int16_t>; -template class Buffer<uint32_t>; -template class Buffer<int32_t>; -template class Buffer<uint64_t>; -template class Buffer<int64_t>; -template class Buffer<char>; -template class Buffer<wchar_t>;
diff -r 7b754354b99c -r 89564915f2a7 Buffer.h --- a/Buffer.h Wed Jan 07 18:34:56 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,163 +0,0 @@ - -/** - * @file Buffer.h - * @brief Software Buffer - Templated Ring Buffer for most data types - * @author sam grove - * @version 1.0 - * @see - * - * Copyright (c) 2013 - * - * 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 BUFFER_H -#define BUFFER_H - -#include <stdint.h> -#include <string.h> - -/** A templated software ring buffer - * - * Example: - * @code - * #include "mbed.h" - * #include "Buffer.h" - * - * Buffer <char> buf; - * - * int main() - * { - * buf = 'a'; - * buf.put('b'); - * char *head = buf.head(); - * puts(head); - * - * char whats_in_there[2] = {0}; - * int pos = 0; - * - * while(buf.available()) - * { - * whats_in_there[pos++] = buf; - * } - * printf("%c %c\n", whats_in_there[0], whats_in_there[1]); - * buf.clear(); - * error("done\n\n\n"); - * } - * @endcode - */ - -template <typename T> -class Buffer -{ -private: - T *_buf; - volatile uint32_t _wloc; - volatile uint32_t _rloc; - uint32_t _size; - -public: - /** Create a Buffer and allocate memory for it - * @param size The size of the buffer - */ - Buffer(uint32_t size = 0x100); - - /** Get the size of the ring buffer - * @return the size of the ring buffer - */ - uint32_t getSize(); - - /** Destry a Buffer and release it's allocated memory - */ - ~Buffer(); - - /** Add a data element into the buffer - * @param data Something to add to the buffer - */ - void put(T data); - - /** Remove a data element from the buffer - * @return Pull the oldest element from the buffer - */ - T get(void); - - /** Get the address to the head of the buffer - * @return The address of element 0 in the buffer - */ - T *head(void); - - /** Reset the buffer to 0. Useful if using head() to parse packeted data - */ - void clear(void); - - /** Determine if anything is readable in the buffer - * @return 1 if something can be read, 0 otherwise - */ - uint32_t available(void); - - /** Overloaded operator for writing to the buffer - * @param data Something to put in the buffer - * @return - */ - Buffer &operator= (T data) - { - put(data); - return *this; - } - - /** Overloaded operator for reading from the buffer - * @return Pull the oldest element from the buffer - */ - operator int(void) - { - return get(); - } - - uint32_t peek(char c); - -}; - -template <class T> -inline void Buffer<T>::put(T data) -{ - _buf[_wloc++] = data; - _wloc %= (_size-1); - - return; -} - -template <class T> -inline T Buffer<T>::get(void) -{ - T data_pos = _buf[_rloc++]; - _rloc %= (_size-1); - - return data_pos; -} - -template <class T> -inline T *Buffer<T>::head(void) -{ - T *data_pos = &_buf[0]; - - return data_pos; -} - -template <class T> -inline uint32_t Buffer<T>::available(void) -{ - return (_wloc == _rloc) ? 0 : 1; -} - -#endif -
diff -r 7b754354b99c -r 89564915f2a7 MyBuffer.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MyBuffer.cpp Mon Mar 07 21:10:13 2016 +0000 @@ -0,0 +1,76 @@ + +/** + * @file Buffer.cpp + * @brief Software Buffer - Templated Ring Buffer for most data types + * @author sam grove + * @version 1.0 + * @see + * + * Copyright (c) 2013 + * + * 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. + */ + +#include "MyBuffer.h" + +template <class T> +MyBuffer<T>::MyBuffer(uint32_t size) +{ + _buf = new T [size]; + _size = size; + clear(); + + return; +} + +template <class T> +MyBuffer<T>::~MyBuffer() +{ + delete [] _buf; + + return; +} + +template <class T> +uint32_t MyBuffer<T>::getSize() +{ + return this->_size; +} + +template <class T> +void MyBuffer<T>::clear(void) +{ + _wloc = 0; + _rloc = 0; + memset(_buf, 0, _size); + + return; +} + +template <class T> +uint32_t MyBuffer<T>::peek(char c) +{ + return 1; +} + +// make the linker aware of some possible types +template class MyBuffer<uint8_t>; +template class MyBuffer<int8_t>; +template class MyBuffer<uint16_t>; +template class MyBuffer<int16_t>; +template class MyBuffer<uint32_t>; +template class MyBuffer<int32_t>; +template class MyBuffer<uint64_t>; +template class MyBuffer<int64_t>; +template class MyBuffer<char>; +template class MyBuffer<wchar_t>;
diff -r 7b754354b99c -r 89564915f2a7 MyBuffer.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MyBuffer.h Mon Mar 07 21:10:13 2016 +0000 @@ -0,0 +1,163 @@ + +/** + * @file Buffer.h + * @brief Software Buffer - Templated Ring Buffer for most data types + * @author sam grove + * @version 1.0 + * @see + * + * Copyright (c) 2013 + * + * 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 MYBUFFER_H +#define MYBUFFER_H + +#include <stdint.h> +#include <string.h> + +/** A templated software ring buffer + * + * Example: + * @code + * #include "mbed.h" + * #include "MyBuffer.h" + * + * MyBuffer <char> buf; + * + * int main() + * { + * buf = 'a'; + * buf.put('b'); + * char *head = buf.head(); + * puts(head); + * + * char whats_in_there[2] = {0}; + * int pos = 0; + * + * while(buf.available()) + * { + * whats_in_there[pos++] = buf; + * } + * printf("%c %c\n", whats_in_there[0], whats_in_there[1]); + * buf.clear(); + * error("done\n\n\n"); + * } + * @endcode + */ + +template <typename T> +class MyBuffer +{ +private: + T *_buf; + volatile uint32_t _wloc; + volatile uint32_t _rloc; + uint32_t _size; + +public: + /** Create a Buffer and allocate memory for it + * @param size The size of the buffer + */ + MyBuffer(uint32_t size = 0x100); + + /** Get the size of the ring buffer + * @return the size of the ring buffer + */ + uint32_t getSize(); + + /** Destry a Buffer and release it's allocated memory + */ + ~MyBuffer(); + + /** Add a data element into the buffer + * @param data Something to add to the buffer + */ + void put(T data); + + /** Remove a data element from the buffer + * @return Pull the oldest element from the buffer + */ + T get(void); + + /** Get the address to the head of the buffer + * @return The address of element 0 in the buffer + */ + T *head(void); + + /** Reset the buffer to 0. Useful if using head() to parse packeted data + */ + void clear(void); + + /** Determine if anything is readable in the buffer + * @return 1 if something can be read, 0 otherwise + */ + uint32_t available(void); + + /** Overloaded operator for writing to the buffer + * @param data Something to put in the buffer + * @return + */ + MyBuffer &operator= (T data) + { + put(data); + return *this; + } + + /** Overloaded operator for reading from the buffer + * @return Pull the oldest element from the buffer + */ + operator int(void) + { + return get(); + } + + uint32_t peek(char c); + +}; + +template <class T> +inline void MyBuffer<T>::put(T data) +{ + _buf[_wloc++] = data; + _wloc %= (_size-1); + + return; +} + +template <class T> +inline T MyBuffer<T>::get(void) +{ + T data_pos = _buf[_rloc++]; + _rloc %= (_size-1); + + return data_pos; +} + +template <class T> +inline T *MyBuffer<T>::head(void) +{ + T *data_pos = &_buf[0]; + + return data_pos; +} + +template <class T> +inline uint32_t MyBuffer<T>::available(void) +{ + return (_wloc == _rloc) ? 0 : 1; +} + +#endif +