private fork
Fork of GSwifiInterface by
GSwifi/CBuffer.h@11:71d67fea5ace, 2013-11-15 (annotated)
- Committer:
- gsfan
- Date:
- Fri Nov 15 04:20:14 2013 +0000
- Revision:
- 11:71d67fea5ace
- Parent:
- 5:78943b3945b5
- Child:
- 12:057089026a20
fix api function, miss spell
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
samux | 1:fb4494783863 | 1 | /* Copyright (C) 2012 mbed.org, MIT License |
samux | 1:fb4494783863 | 2 | * |
samux | 1:fb4494783863 | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
samux | 1:fb4494783863 | 4 | * and associated documentation files (the "Software"), to deal in the Software without restriction, |
samux | 1:fb4494783863 | 5 | * including without limitation the rights to use, copy, modify, merge, publish, distribute, |
samux | 1:fb4494783863 | 6 | * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is |
samux | 1:fb4494783863 | 7 | * furnished to do so, subject to the following conditions: |
samux | 1:fb4494783863 | 8 | * |
samux | 1:fb4494783863 | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
samux | 1:fb4494783863 | 10 | * substantial portions of the Software. |
samux | 1:fb4494783863 | 11 | * |
samux | 1:fb4494783863 | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
samux | 1:fb4494783863 | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
samux | 1:fb4494783863 | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
samux | 1:fb4494783863 | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
samux | 1:fb4494783863 | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
samux | 1:fb4494783863 | 17 | */ |
samux | 1:fb4494783863 | 18 | |
samux | 1:fb4494783863 | 19 | #ifndef CIRCBUFFER_H_ |
samux | 1:fb4494783863 | 20 | #define CIRCBUFFER_H_ |
samux | 1:fb4494783863 | 21 | |
samux | 1:fb4494783863 | 22 | template <class T> |
samux | 1:fb4494783863 | 23 | class CircBuffer { |
samux | 1:fb4494783863 | 24 | public: |
samux | 1:fb4494783863 | 25 | CircBuffer(int length) { |
samux | 1:fb4494783863 | 26 | write = 0; |
samux | 1:fb4494783863 | 27 | read = 0; |
samux | 1:fb4494783863 | 28 | size = length + 1; |
samux | 1:fb4494783863 | 29 | buf = (T *)malloc(size * sizeof(T)); |
gsfan | 11:71d67fea5ace | 30 | if (buf == NULL) |
gsfan | 11:71d67fea5ace | 31 | error("Can't allocate memory"); |
samux | 1:fb4494783863 | 32 | }; |
samux | 1:fb4494783863 | 33 | |
samux | 1:fb4494783863 | 34 | bool isFull() { |
samux | 1:fb4494783863 | 35 | return (((write + 1) % size) == read); |
samux | 1:fb4494783863 | 36 | }; |
samux | 1:fb4494783863 | 37 | |
samux | 1:fb4494783863 | 38 | bool isEmpty() { |
samux | 1:fb4494783863 | 39 | return (read == write); |
samux | 1:fb4494783863 | 40 | }; |
samux | 1:fb4494783863 | 41 | |
samux | 1:fb4494783863 | 42 | void queue(T k) { |
samux | 1:fb4494783863 | 43 | if (isFull()) { |
samux | 1:fb4494783863 | 44 | read++; |
samux | 1:fb4494783863 | 45 | read %= size; |
samux | 1:fb4494783863 | 46 | } |
samux | 1:fb4494783863 | 47 | buf[write++] = k; |
samux | 1:fb4494783863 | 48 | write %= size; |
samux | 1:fb4494783863 | 49 | } |
samux | 1:fb4494783863 | 50 | |
samux | 1:fb4494783863 | 51 | void flush() { |
samux | 1:fb4494783863 | 52 | read = 0; |
samux | 1:fb4494783863 | 53 | write = 0; |
samux | 1:fb4494783863 | 54 | } |
samux | 1:fb4494783863 | 55 | |
samux | 1:fb4494783863 | 56 | |
samux | 1:fb4494783863 | 57 | uint32_t available() { |
samux | 1:fb4494783863 | 58 | return (write >= read) ? write - read : size - read + write; |
samux | 1:fb4494783863 | 59 | }; |
samux | 1:fb4494783863 | 60 | |
samux | 1:fb4494783863 | 61 | bool dequeue(T * c) { |
samux | 1:fb4494783863 | 62 | bool empty = isEmpty(); |
samux | 1:fb4494783863 | 63 | if (!empty) { |
samux | 1:fb4494783863 | 64 | *c = buf[read++]; |
samux | 1:fb4494783863 | 65 | read %= size; |
samux | 1:fb4494783863 | 66 | } |
samux | 1:fb4494783863 | 67 | return(!empty); |
samux | 1:fb4494783863 | 68 | }; |
samux | 1:fb4494783863 | 69 | |
samux | 1:fb4494783863 | 70 | private: |
samux | 1:fb4494783863 | 71 | volatile uint32_t write; |
samux | 1:fb4494783863 | 72 | volatile uint32_t read; |
samux | 1:fb4494783863 | 73 | uint32_t size; |
samux | 1:fb4494783863 | 74 | T * buf; |
samux | 1:fb4494783863 | 75 | }; |
samux | 1:fb4494783863 | 76 | |
samux | 1:fb4494783863 | 77 | #endif |