Samuel Mokrani
Library to use a wifly module: RN 131 C/G
Dependents: RN-XV_simple_server
CBuffer.h@19:cf1a7a5cc8d6, 2012-05-09 (annotated)
- Committer:
- samux
- Date:
- Wed May 09 11:46:39 2012 +0000
- Revision:
- 19:cf1a7a5cc8d6
- Parent:
- 17:56f3c4da1ea8
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| samux | 17:56f3c4da1ea8 | 1 | #ifndef CBUFFER_H |
| samux | 17:56f3c4da1ea8 | 2 | #define CBUFFER_H |
| samux | 17:56f3c4da1ea8 | 3 | |
| samux | 17:56f3c4da1ea8 | 4 | #define MAX_BUF 128 |
| samux | 17:56f3c4da1ea8 | 5 | |
| samux | 17:56f3c4da1ea8 | 6 | class CBuffer { |
| samux | 17:56f3c4da1ea8 | 7 | public: |
| samux | 17:56f3c4da1ea8 | 8 | CBuffer() { |
| samux | 17:56f3c4da1ea8 | 9 | write = 0; |
| samux | 17:56f3c4da1ea8 | 10 | read = 0; |
| samux | 17:56f3c4da1ea8 | 11 | size = MAX_BUF + 1; |
| samux | 17:56f3c4da1ea8 | 12 | }; |
| samux | 17:56f3c4da1ea8 | 13 | |
| samux | 17:56f3c4da1ea8 | 14 | bool isFull() { |
| samux | 17:56f3c4da1ea8 | 15 | return ((write + 1) % size == read); |
| samux | 17:56f3c4da1ea8 | 16 | }; |
| samux | 17:56f3c4da1ea8 | 17 | |
| samux | 17:56f3c4da1ea8 | 18 | bool isEmpty() { |
| samux | 17:56f3c4da1ea8 | 19 | return (read == write); |
| samux | 17:56f3c4da1ea8 | 20 | }; |
| samux | 17:56f3c4da1ea8 | 21 | |
| samux | 17:56f3c4da1ea8 | 22 | void queue(uint8_t k) { |
| samux | 17:56f3c4da1ea8 | 23 | if (isFull()) { |
| samux | 17:56f3c4da1ea8 | 24 | read++; |
| samux | 17:56f3c4da1ea8 | 25 | read %= size; |
| samux | 17:56f3c4da1ea8 | 26 | } |
| samux | 17:56f3c4da1ea8 | 27 | buf[write++] = k; |
| samux | 17:56f3c4da1ea8 | 28 | write %= size; |
| samux | 17:56f3c4da1ea8 | 29 | } |
| samux | 17:56f3c4da1ea8 | 30 | |
| samux | 17:56f3c4da1ea8 | 31 | uint16_t available() { |
| samux | 17:56f3c4da1ea8 | 32 | return (write >= read) ? write - read : size - read + write; |
| samux | 17:56f3c4da1ea8 | 33 | }; |
| samux | 17:56f3c4da1ea8 | 34 | |
| samux | 17:56f3c4da1ea8 | 35 | bool dequeue(uint8_t * c) { |
| samux | 17:56f3c4da1ea8 | 36 | if (!isEmpty()) { |
| samux | 17:56f3c4da1ea8 | 37 | *c = buf[read++]; |
| samux | 17:56f3c4da1ea8 | 38 | read %= size; |
| samux | 17:56f3c4da1ea8 | 39 | } |
| samux | 17:56f3c4da1ea8 | 40 | return(!isEmpty()); |
| samux | 17:56f3c4da1ea8 | 41 | }; |
| samux | 17:56f3c4da1ea8 | 42 | |
| samux | 17:56f3c4da1ea8 | 43 | |
| samux | 17:56f3c4da1ea8 | 44 | private: |
| samux | 17:56f3c4da1ea8 | 45 | volatile uint16_t write; |
| samux | 17:56f3c4da1ea8 | 46 | volatile uint16_t read; |
| samux | 17:56f3c4da1ea8 | 47 | uint16_t size; |
| samux | 17:56f3c4da1ea8 | 48 | uint8_t buf[MAX_BUF + 1]; |
| samux | 17:56f3c4da1ea8 | 49 | }; |
| samux | 17:56f3c4da1ea8 | 50 | |
| samux | 17:56f3c4da1ea8 | 51 | #endif |