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ESP8266InterfaceTiny/ESP8266/CBuffer.h@1:e2ca99ac317b, 2015-12-18 (annotated)
- Committer:
- jksoft
- Date:
- Fri Dec 18 04:34:22 2015 +0000
- Revision:
- 1:e2ca99ac317b
ESP8266?????????????;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jksoft | 1:e2ca99ac317b | 1 | /* Copyright (C) 2012 mbed.org, MIT License |
jksoft | 1:e2ca99ac317b | 2 | * |
jksoft | 1:e2ca99ac317b | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
jksoft | 1:e2ca99ac317b | 4 | * and associated documentation files (the "Software"), to deal in the Software without restriction, |
jksoft | 1:e2ca99ac317b | 5 | * including without limitation the rights to use, copy, modify, merge, publish, distribute, |
jksoft | 1:e2ca99ac317b | 6 | * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is |
jksoft | 1:e2ca99ac317b | 7 | * furnished to do so, subject to the following conditions: |
jksoft | 1:e2ca99ac317b | 8 | * |
jksoft | 1:e2ca99ac317b | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
jksoft | 1:e2ca99ac317b | 10 | * substantial portions of the Software. |
jksoft | 1:e2ca99ac317b | 11 | * |
jksoft | 1:e2ca99ac317b | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
jksoft | 1:e2ca99ac317b | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
jksoft | 1:e2ca99ac317b | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
jksoft | 1:e2ca99ac317b | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
jksoft | 1:e2ca99ac317b | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
jksoft | 1:e2ca99ac317b | 17 | */ |
jksoft | 1:e2ca99ac317b | 18 | |
jksoft | 1:e2ca99ac317b | 19 | #ifndef CIRCBUFFER_H_ |
jksoft | 1:e2ca99ac317b | 20 | #define CIRCBUFFER_H_ |
jksoft | 1:e2ca99ac317b | 21 | |
jksoft | 1:e2ca99ac317b | 22 | template <class T> |
jksoft | 1:e2ca99ac317b | 23 | class CircBuffer { |
jksoft | 1:e2ca99ac317b | 24 | public: |
jksoft | 1:e2ca99ac317b | 25 | CircBuffer(int length) { |
jksoft | 1:e2ca99ac317b | 26 | write = 0; |
jksoft | 1:e2ca99ac317b | 27 | read = 0; |
jksoft | 1:e2ca99ac317b | 28 | size = length + 1; |
jksoft | 1:e2ca99ac317b | 29 | buf = (T *)malloc(size * sizeof(T)); |
jksoft | 1:e2ca99ac317b | 30 | }; |
jksoft | 1:e2ca99ac317b | 31 | |
jksoft | 1:e2ca99ac317b | 32 | bool isFull() { |
jksoft | 1:e2ca99ac317b | 33 | return (((write + 1) % size) == read); |
jksoft | 1:e2ca99ac317b | 34 | }; |
jksoft | 1:e2ca99ac317b | 35 | |
jksoft | 1:e2ca99ac317b | 36 | bool isEmpty() { |
jksoft | 1:e2ca99ac317b | 37 | return (read == write); |
jksoft | 1:e2ca99ac317b | 38 | }; |
jksoft | 1:e2ca99ac317b | 39 | |
jksoft | 1:e2ca99ac317b | 40 | void queue(T k) { |
jksoft | 1:e2ca99ac317b | 41 | if (isFull()) { |
jksoft | 1:e2ca99ac317b | 42 | read++; |
jksoft | 1:e2ca99ac317b | 43 | read %= size; |
jksoft | 1:e2ca99ac317b | 44 | } |
jksoft | 1:e2ca99ac317b | 45 | buf[write++] = k; |
jksoft | 1:e2ca99ac317b | 46 | write %= size; |
jksoft | 1:e2ca99ac317b | 47 | } |
jksoft | 1:e2ca99ac317b | 48 | |
jksoft | 1:e2ca99ac317b | 49 | void flush() { |
jksoft | 1:e2ca99ac317b | 50 | read = 0; |
jksoft | 1:e2ca99ac317b | 51 | write = 0; |
jksoft | 1:e2ca99ac317b | 52 | } |
jksoft | 1:e2ca99ac317b | 53 | |
jksoft | 1:e2ca99ac317b | 54 | |
jksoft | 1:e2ca99ac317b | 55 | uint32_t available() { |
jksoft | 1:e2ca99ac317b | 56 | return (write >= read) ? write - read : size - read + write; |
jksoft | 1:e2ca99ac317b | 57 | }; |
jksoft | 1:e2ca99ac317b | 58 | |
jksoft | 1:e2ca99ac317b | 59 | bool dequeue(T * c) { |
jksoft | 1:e2ca99ac317b | 60 | bool empty = isEmpty(); |
jksoft | 1:e2ca99ac317b | 61 | if (!empty) { |
jksoft | 1:e2ca99ac317b | 62 | *c = buf[read++]; |
jksoft | 1:e2ca99ac317b | 63 | read %= size; |
jksoft | 1:e2ca99ac317b | 64 | } |
jksoft | 1:e2ca99ac317b | 65 | return(!empty); |
jksoft | 1:e2ca99ac317b | 66 | }; |
jksoft | 1:e2ca99ac317b | 67 | |
jksoft | 1:e2ca99ac317b | 68 | private: |
jksoft | 1:e2ca99ac317b | 69 | volatile uint32_t write; |
jksoft | 1:e2ca99ac317b | 70 | volatile uint32_t read; |
jksoft | 1:e2ca99ac317b | 71 | uint32_t size; |
jksoft | 1:e2ca99ac317b | 72 | T * buf; |
jksoft | 1:e2ca99ac317b | 73 | }; |
jksoft | 1:e2ca99ac317b | 74 | |
jksoft | 1:e2ca99ac317b | 75 | #endif |