Ruprecht Altenburger / Mbed OS simple_program

Simple program for introduction of mirror actuator.

ThreadFlag.cpp@13:1bf960928a93, 2021-05-01 (annotated)

Committer:
altb2
Date:
Sat May 01 20:08:24 2021 +0000
Revision:
13:1bf960928a93
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
altb2 13:1bf960928a93 1 /*
altb2 13:1bf960928a93 2 * ThreadFlag.cpp
altb2 13:1bf960928a93 3 * Copyright (c) 2019, ZHAW
altb2 13:1bf960928a93 4 * All rights reserved.
altb2 13:1bf960928a93 5 *
altb2 13:1bf960928a93 6 * Created on: 29.11.2019
altb2 13:1bf960928a93 7 * Author: Marcel Honegger
altb2 13:1bf960928a93 8 */
altb2 13:1bf960928a93 9
altb2 13:1bf960928a93 10 #include "ThreadFlag.h"
altb2 13:1bf960928a93 11
altb2 13:1bf960928a93 12 using namespace std;
altb2 13:1bf960928a93 13
altb2 13:1bf960928a93 14 uint32_t ThreadFlag::threadFlags = 0;
altb2 13:1bf960928a93 15
altb2 13:1bf960928a93 16 /**
altb2 13:1bf960928a93 17 * Creates a signal object and assignes a unique flag.
altb2 13:1bf960928a93 18 */
altb2 13:1bf960928a93 19 ThreadFlag::ThreadFlag() {
altb2 13:1bf960928a93 20
altb2 13:1bf960928a93 21 mutex.lock();
altb2 13:1bf960928a93 22
altb2 13:1bf960928a93 23 uint32_t n = 0;
altb2 13:1bf960928a93 24 while ((((1 << n) & threadFlags) > 0) && (n < 30)) n++;
altb2 13:1bf960928a93 25 threadFlag = (1 << n);
altb2 13:1bf960928a93 26
altb2 13:1bf960928a93 27 mutex.unlock();
altb2 13:1bf960928a93 28 }
altb2 13:1bf960928a93 29
altb2 13:1bf960928a93 30 /**
altb2 13:1bf960928a93 31 * Deletes the signal object and releases the assigned flag.
altb2 13:1bf960928a93 32 */
altb2 13:1bf960928a93 33 ThreadFlag::~ThreadFlag() {
altb2 13:1bf960928a93 34
altb2 13:1bf960928a93 35 mutex.lock();
altb2 13:1bf960928a93 36
altb2 13:1bf960928a93 37 threadFlags &= ~threadFlag;
altb2 13:1bf960928a93 38
altb2 13:1bf960928a93 39 mutex.unlock();
altb2 13:1bf960928a93 40 }
altb2 13:1bf960928a93 41
altb2 13:1bf960928a93 42 /**
altb2 13:1bf960928a93 43 * Gets the assigned thread flag.
altb2 13:1bf960928a93 44 */
altb2 13:1bf960928a93 45 uint32_t ThreadFlag::read() {
altb2 13:1bf960928a93 46
altb2 13:1bf960928a93 47 return threadFlag;
altb2 13:1bf960928a93 48 }
altb2 13:1bf960928a93 49
altb2 13:1bf960928a93 50 /**
altb2 13:1bf960928a93 51 * The empty operator is a shorthand notation of the <code>read()</code> method.
altb2 13:1bf960928a93 52 */
altb2 13:1bf960928a93 53 ThreadFlag::operator uint32_t() {
altb2 13:1bf960928a93 54
altb2 13:1bf960928a93 55 return read();
altb2 13:1bf960928a93 56 }
altb2 13:1bf960928a93 57