ROME 2 Lab5
ThreadFlag.cpp@1:5201940a41c1, 2020-06-12 (annotated)
- Committer:
- oehlemar
- Date:
- Fri Jun 12 08:19:42 2020 +0000
- Revision:
- 1:5201940a41c1
- Parent:
- 0:893a1e710078
asdf
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| oehlemar | 0:893a1e710078 | 1 | /* |
| oehlemar | 0:893a1e710078 | 2 | * ThreadFlag.cpp |
| oehlemar | 0:893a1e710078 | 3 | * Copyright (c) 2020, ZHAW |
| oehlemar | 0:893a1e710078 | 4 | * All rights reserved. |
| oehlemar | 0:893a1e710078 | 5 | */ |
| oehlemar | 0:893a1e710078 | 6 | |
| oehlemar | 0:893a1e710078 | 7 | #include "ThreadFlag.h" |
| oehlemar | 0:893a1e710078 | 8 | |
| oehlemar | 0:893a1e710078 | 9 | using namespace std; |
| oehlemar | 0:893a1e710078 | 10 | |
| oehlemar | 0:893a1e710078 | 11 | unsigned int ThreadFlag::threadFlags = 0; |
| oehlemar | 0:893a1e710078 | 12 | |
| oehlemar | 0:893a1e710078 | 13 | /** |
| oehlemar | 0:893a1e710078 | 14 | * Creates a signal object and assignes a unique flag. |
| oehlemar | 0:893a1e710078 | 15 | */ |
| oehlemar | 0:893a1e710078 | 16 | ThreadFlag::ThreadFlag() { |
| oehlemar | 0:893a1e710078 | 17 | |
| oehlemar | 0:893a1e710078 | 18 | mutex.lock(); |
| oehlemar | 0:893a1e710078 | 19 | |
| oehlemar | 0:893a1e710078 | 20 | unsigned int n = 0; |
| oehlemar | 0:893a1e710078 | 21 | while ((((1 << n) & threadFlags) > 0) && (n < 30)) n++; |
| oehlemar | 0:893a1e710078 | 22 | threadFlag = (1 << n); |
| oehlemar | 0:893a1e710078 | 23 | |
| oehlemar | 0:893a1e710078 | 24 | mutex.unlock(); |
| oehlemar | 0:893a1e710078 | 25 | } |
| oehlemar | 0:893a1e710078 | 26 | |
| oehlemar | 0:893a1e710078 | 27 | /** |
| oehlemar | 0:893a1e710078 | 28 | * Deletes the signal object and releases the assigned flag. |
| oehlemar | 0:893a1e710078 | 29 | */ |
| oehlemar | 0:893a1e710078 | 30 | ThreadFlag::~ThreadFlag() { |
| oehlemar | 0:893a1e710078 | 31 | |
| oehlemar | 0:893a1e710078 | 32 | mutex.lock(); |
| oehlemar | 0:893a1e710078 | 33 | |
| oehlemar | 0:893a1e710078 | 34 | threadFlags &= ~threadFlag; |
| oehlemar | 0:893a1e710078 | 35 | |
| oehlemar | 0:893a1e710078 | 36 | mutex.unlock(); |
| oehlemar | 0:893a1e710078 | 37 | } |
| oehlemar | 0:893a1e710078 | 38 | |
| oehlemar | 0:893a1e710078 | 39 | /** |
| oehlemar | 0:893a1e710078 | 40 | * Gets the assigned thread flag. |
| oehlemar | 0:893a1e710078 | 41 | */ |
| oehlemar | 0:893a1e710078 | 42 | unsigned int ThreadFlag::read() { |
| oehlemar | 0:893a1e710078 | 43 | |
| oehlemar | 0:893a1e710078 | 44 | return threadFlag; |
| oehlemar | 0:893a1e710078 | 45 | } |
| oehlemar | 0:893a1e710078 | 46 | |
| oehlemar | 0:893a1e710078 | 47 | /** |
| oehlemar | 0:893a1e710078 | 48 | * The empty operator is a shorthand notation of the <code>read()</code> method. |
| oehlemar | 0:893a1e710078 | 49 | */ |
| oehlemar | 0:893a1e710078 | 50 | ThreadFlag::operator unsigned int() { |
| oehlemar | 0:893a1e710078 | 51 | |
| oehlemar | 0:893a1e710078 | 52 | return read(); |
| oehlemar | 0:893a1e710078 | 53 | } |
| oehlemar | 0:893a1e710078 | 54 |