Nicolas Borla / Mbed OS PES2_mbed_os

PES2_mbed_os_6

Dependencies:   Servo

ThreadFlag.cpp@0:5d4d21d56334, 2021-03-12 (annotated)

Committer:
boro
Date:
Fri Mar 12 13:04:33 2021 +0000
Revision:
0:5d4d21d56334
controller added;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
boro 0:5d4d21d56334 1 /*
boro 0:5d4d21d56334 2 * ThreadFlag.cpp
boro 0:5d4d21d56334 3 * Copyright (c) 2020, ZHAW
boro 0:5d4d21d56334 4 * All rights reserved.
boro 0:5d4d21d56334 5 */
boro 0:5d4d21d56334 6
boro 0:5d4d21d56334 7 #include "ThreadFlag.h"
boro 0:5d4d21d56334 8
boro 0:5d4d21d56334 9 using namespace std;
boro 0:5d4d21d56334 10
boro 0:5d4d21d56334 11 unsigned int ThreadFlag::threadFlags = 0;
boro 0:5d4d21d56334 12
boro 0:5d4d21d56334 13 /**
boro 0:5d4d21d56334 14 * Creates a signal object and assignes a unique flag.
boro 0:5d4d21d56334 15 */
boro 0:5d4d21d56334 16 ThreadFlag::ThreadFlag() {
boro 0:5d4d21d56334 17
boro 0:5d4d21d56334 18 mutex.lock();
boro 0:5d4d21d56334 19
boro 0:5d4d21d56334 20 unsigned int n = 0;
boro 0:5d4d21d56334 21 while ((((1 << n) & threadFlags) > 0) && (n < 30)) n++;
boro 0:5d4d21d56334 22 threadFlag = (1 << n);
boro 0:5d4d21d56334 23
boro 0:5d4d21d56334 24 mutex.unlock();
boro 0:5d4d21d56334 25 }
boro 0:5d4d21d56334 26
boro 0:5d4d21d56334 27 /**
boro 0:5d4d21d56334 28 * Deletes the signal object and releases the assigned flag.
boro 0:5d4d21d56334 29 */
boro 0:5d4d21d56334 30 ThreadFlag::~ThreadFlag() {
boro 0:5d4d21d56334 31
boro 0:5d4d21d56334 32 mutex.lock();
boro 0:5d4d21d56334 33
boro 0:5d4d21d56334 34 threadFlags &= ~threadFlag;
boro 0:5d4d21d56334 35
boro 0:5d4d21d56334 36 mutex.unlock();
boro 0:5d4d21d56334 37 }
boro 0:5d4d21d56334 38
boro 0:5d4d21d56334 39 /**
boro 0:5d4d21d56334 40 * Gets the assigned thread flag.
boro 0:5d4d21d56334 41 */
boro 0:5d4d21d56334 42 unsigned int ThreadFlag::read() {
boro 0:5d4d21d56334 43
boro 0:5d4d21d56334 44 return threadFlag;
boro 0:5d4d21d56334 45 }
boro 0:5d4d21d56334 46
boro 0:5d4d21d56334 47 /**
boro 0:5d4d21d56334 48 * The empty operator is a shorthand notation of the <code>read()</code> method.
boro 0:5d4d21d56334 49 */
boro 0:5d4d21d56334 50 ThreadFlag::operator unsigned int() {
boro 0:5d4d21d56334 51
boro 0:5d4d21d56334 52 return read();
boro 0:5d4d21d56334 53 }
boro 0:5d4d21d56334 54