Furkan Cinar / PM2_Libary

Workshop 2

Dependencies:   FastPWM

ThreadFlag.cpp@6:41dd03654c44, 2021-04-07 (annotated)

Committer:
pmic
Date:
Wed Apr 07 12:13:45 2021 +0000
Revision:
6:41dd03654c44
Parent:
4:9c003c402033 
Last commit before first workshop 2.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pmic 0:86129f1b4a93 1 /*
pmic 0:86129f1b4a93 2 * ThreadFlag.cpp
pmic 0:86129f1b4a93 3 * Copyright (c) 2020, ZHAW
pmic 0:86129f1b4a93 4 * All rights reserved.
pmic 0:86129f1b4a93 5 */
pmic 0:86129f1b4a93 6
pmic 0:86129f1b4a93 7 #include "ThreadFlag.h"
pmic 0:86129f1b4a93 8
pmic 0:86129f1b4a93 9 using namespace std;
pmic 0:86129f1b4a93 10
pmic 0:86129f1b4a93 11 unsigned int ThreadFlag::threadFlags = 0;
pmic 0:86129f1b4a93 12
pmic 0:86129f1b4a93 13 /**
pmic 0:86129f1b4a93 14 * Creates a signal object and assignes a unique flag.
pmic 0:86129f1b4a93 15 */
pmic 4:9c003c402033 16 ThreadFlag::ThreadFlag()
pmic 4:9c003c402033 17 {
pmic 0:86129f1b4a93 18 mutex.lock();
pmic 4:9c003c402033 19
pmic 0:86129f1b4a93 20 unsigned int n = 0;
pmic 0:86129f1b4a93 21 while ((((1 << n) & threadFlags) > 0) && (n < 30)) n++;
pmic 0:86129f1b4a93 22 threadFlag = (1 << n);
pmic 4:9c003c402033 23
pmic 0:86129f1b4a93 24 mutex.unlock();
pmic 0:86129f1b4a93 25 }
pmic 0:86129f1b4a93 26
pmic 0:86129f1b4a93 27 /**
pmic 0:86129f1b4a93 28 * Deletes the signal object and releases the assigned flag.
pmic 0:86129f1b4a93 29 */
pmic 4:9c003c402033 30 ThreadFlag::~ThreadFlag()
pmic 4:9c003c402033 31 {
pmic 0:86129f1b4a93 32 mutex.lock();
pmic 4:9c003c402033 33
pmic 0:86129f1b4a93 34 threadFlags &= ~threadFlag;
pmic 4:9c003c402033 35
pmic 0:86129f1b4a93 36 mutex.unlock();
pmic 0:86129f1b4a93 37 }
pmic 0:86129f1b4a93 38
pmic 0:86129f1b4a93 39 /**
pmic 0:86129f1b4a93 40 * Gets the assigned thread flag.
pmic 0:86129f1b4a93 41 */
pmic 4:9c003c402033 42 unsigned int ThreadFlag::read()
pmic 4:9c003c402033 43 {
pmic 0:86129f1b4a93 44 return threadFlag;
pmic 0:86129f1b4a93 45 }
pmic 0:86129f1b4a93 46
pmic 0:86129f1b4a93 47 /**
pmic 0:86129f1b4a93 48 * The empty operator is a shorthand notation of the <code>read()</code> method.
pmic 0:86129f1b4a93 49 */
pmic 4:9c003c402033 50 ThreadFlag::operator unsigned int()
pmic 4:9c003c402033 51 {
pmic 0:86129f1b4a93 52 return read();
pmic 0:86129f1b4a93 53 }
pmic 0:86129f1b4a93 54