Diff: ThreadFlag.cpp

Revision:

0:86129f1b4a93

Child:

4:9c003c402033

diff -r 000000000000 -r 86129f1b4a93 ThreadFlag.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ThreadFlag.cpp	Tue Mar 30 12:21:00 2021 +0000
@@ -0,0 +1,54 @@
+/*
+ * ThreadFlag.cpp
+ * Copyright (c) 2020, ZHAW
+ * All rights reserved.
+ */
+
+#include "ThreadFlag.h"
+
+using namespace std;
+
+unsigned int ThreadFlag::threadFlags = 0;
+
+/**
+ * Creates a signal object and assignes a unique flag.
+ */
+ThreadFlag::ThreadFlag() {
+    
+    mutex.lock();
+    
+    unsigned int n = 0;
+    while ((((1 << n) & threadFlags) > 0) && (n < 30)) n++;
+    threadFlag = (1 << n);
+    
+    mutex.unlock();
+}
+
+/**
+ * Deletes the signal object and releases the assigned flag.
+ */
+ThreadFlag::~ThreadFlag() {
+    
+    mutex.lock();
+    
+    threadFlags &= ~threadFlag;
+    
+    mutex.unlock();
+}
+
+/**
+ * Gets the assigned thread flag.
+ */
+unsigned int ThreadFlag::read() {
+    
+    return threadFlag;
+}
+
+/**
+ * The empty operator is a shorthand notation of the <code>read()</code> method.
+ */
+ThreadFlag::operator unsigned int() {
+    
+    return read();
+}
+