mbed official / CellularModem

Base library for cellular modem implementations

Dependencies:   Socket lwip-sys lwip

Dependents:   CellularUSBModem CellularUSBModem

Deprecated

This is an mbed 2 networking library. For mbed 5, the networking libraries have been revised to better support additional network stacks and thread safety here.

core/MtxCircBuffer.h@8:944cd194963e, 2014-05-08 (annotated)

Committer:
mbed_official
Date:
Thu May 08 11:00:26 2014 +0100
Revision:
8:944cd194963e
Parent:
1:4a23efdf0da9 
Synchronized with git revision df12bf01ac7dbb50751e2b16a351c894994e1dcf



Full URL: https://github.com/mbedmicro/mbed/commit/df12bf01ac7dbb50751e2b16a351c894994e1dcf/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 1:4a23efdf0da9 1 /* MtxCircBuf.h */
bogdanm 1:4a23efdf0da9 2 /* Copyright (C) 2012 mbed.org, MIT License
bogdanm 1:4a23efdf0da9 3 *
bogdanm 1:4a23efdf0da9 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
bogdanm 1:4a23efdf0da9 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
bogdanm 1:4a23efdf0da9 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
bogdanm 1:4a23efdf0da9 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
bogdanm 1:4a23efdf0da9 8 * furnished to do so, subject to the following conditions:
bogdanm 1:4a23efdf0da9 9 *
bogdanm 1:4a23efdf0da9 10 * The above copyright notice and this permission notice shall be included in all copies or
bogdanm 1:4a23efdf0da9 11 * substantial portions of the Software.
bogdanm 1:4a23efdf0da9 12 *
bogdanm 1:4a23efdf0da9 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
bogdanm 1:4a23efdf0da9 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
bogdanm 1:4a23efdf0da9 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
bogdanm 1:4a23efdf0da9 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
bogdanm 1:4a23efdf0da9 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
bogdanm 1:4a23efdf0da9 18 */
bogdanm 1:4a23efdf0da9 19
bogdanm 1:4a23efdf0da9 20 #ifndef MTXCIRCBUFFER_H
bogdanm 1:4a23efdf0da9 21 #define MTXCIRCBUFFER_H
bogdanm 1:4a23efdf0da9 22
bogdanm 1:4a23efdf0da9 23 #include "rtos.h"
bogdanm 1:4a23efdf0da9 24
bogdanm 1:4a23efdf0da9 25 //Mutex protected circualr buffer
bogdanm 1:4a23efdf0da9 26 template<typename T, int size>
bogdanm 1:4a23efdf0da9 27 class MtxCircBuffer
bogdanm 1:4a23efdf0da9 28 {
bogdanm 1:4a23efdf0da9 29 public:
bogdanm 1:4a23efdf0da9 30 MtxCircBuffer() //:
bogdanm 1:4a23efdf0da9 31 //mtx()
bogdanm 1:4a23efdf0da9 32 {
bogdanm 1:4a23efdf0da9 33 write = 0;
bogdanm 1:4a23efdf0da9 34 read = 0;
bogdanm 1:4a23efdf0da9 35 }
bogdanm 1:4a23efdf0da9 36
bogdanm 1:4a23efdf0da9 37 bool isFull()
bogdanm 1:4a23efdf0da9 38 {
bogdanm 1:4a23efdf0da9 39 mtx.lock();
bogdanm 1:4a23efdf0da9 40 bool r = (((write + 1) % size) == read);
bogdanm 1:4a23efdf0da9 41 mtx.unlock();
bogdanm 1:4a23efdf0da9 42 return r;
bogdanm 1:4a23efdf0da9 43 }
bogdanm 1:4a23efdf0da9 44
bogdanm 1:4a23efdf0da9 45 bool isEmpty()
bogdanm 1:4a23efdf0da9 46 {
bogdanm 1:4a23efdf0da9 47 mtx.lock();
bogdanm 1:4a23efdf0da9 48 bool r = (read == write);
bogdanm 1:4a23efdf0da9 49 mtx.unlock();
bogdanm 1:4a23efdf0da9 50 return r;
bogdanm 1:4a23efdf0da9 51 }
bogdanm 1:4a23efdf0da9 52
bogdanm 1:4a23efdf0da9 53 void queue(T k)
bogdanm 1:4a23efdf0da9 54 {
bogdanm 1:4a23efdf0da9 55 mtx.lock();
bogdanm 1:4a23efdf0da9 56 buf[write++] = k;
bogdanm 1:4a23efdf0da9 57 write %= size;
bogdanm 1:4a23efdf0da9 58 if (isFull())
bogdanm 1:4a23efdf0da9 59 {
bogdanm 1:4a23efdf0da9 60 read++;
bogdanm 1:4a23efdf0da9 61 read %= size;
bogdanm 1:4a23efdf0da9 62 }
bogdanm 1:4a23efdf0da9 63 mtx.unlock();
bogdanm 1:4a23efdf0da9 64 }
bogdanm 1:4a23efdf0da9 65
bogdanm 1:4a23efdf0da9 66 uint16_t available()
bogdanm 1:4a23efdf0da9 67 {
bogdanm 1:4a23efdf0da9 68 mtx.lock();
bogdanm 1:4a23efdf0da9 69 uint16_t a = (write >= read) ? (write - read) : (size - read + write);
bogdanm 1:4a23efdf0da9 70 mtx.unlock();
bogdanm 1:4a23efdf0da9 71 return a;
bogdanm 1:4a23efdf0da9 72 }
bogdanm 1:4a23efdf0da9 73
bogdanm 1:4a23efdf0da9 74 bool dequeue(T * c)
bogdanm 1:4a23efdf0da9 75 {
bogdanm 1:4a23efdf0da9 76 mtx.lock();
bogdanm 1:4a23efdf0da9 77 bool empty = (read == write);
bogdanm 1:4a23efdf0da9 78 if (!empty)
bogdanm 1:4a23efdf0da9 79 {
bogdanm 1:4a23efdf0da9 80 *c = buf[read++];
bogdanm 1:4a23efdf0da9 81 read %= size;
bogdanm 1:4a23efdf0da9 82 }
bogdanm 1:4a23efdf0da9 83 mtx.unlock();
bogdanm 1:4a23efdf0da9 84 return (!empty);
bogdanm 1:4a23efdf0da9 85 }
bogdanm 1:4a23efdf0da9 86
bogdanm 1:4a23efdf0da9 87 private:
bogdanm 1:4a23efdf0da9 88 volatile uint16_t write;
bogdanm 1:4a23efdf0da9 89 volatile uint16_t read;
bogdanm 1:4a23efdf0da9 90 volatile T buf[size];
bogdanm 1:4a23efdf0da9 91 Mutex mtx;
bogdanm 1:4a23efdf0da9 92 };
bogdanm 1:4a23efdf0da9 93
bogdanm 1:4a23efdf0da9 94 #endif
bogdanm 1:4a23efdf0da9 95