add missing files to git

CppTimer.cpp

@@ -0,0 +1,97 @@
+#include "CppTimer.h"
+#include <fcntl.h>
+
+/**
+ * GNU GENERAL PUBLIC LICENSE
+ * Version 3, 29 June 2007
+ *
+ * (C) 2020, Bernd Porr <mail@bernporr.me.uk>
+ * 
+ * This is inspired by the timer_create man page.
+ **/
+
+CppTimer::CppTimer() {
+	// We create a static handler catches the signal SIG
+	sa.sa_flags = SA_SIGINFO;
+	sa.sa_sigaction = handler;
+	sigemptyset(&sa.sa_mask);
+	if (sigaction(SIG, &sa, NULL) == -1)
+		throw("Could not create signal handler");
+	
+	if(pipe(pipeFd) < 0)
+		throw("Could not create pipe");
+	
+	// Create the timer
+	sev.sigev_notify = SIGEV_SIGNAL;
+	sev.sigev_signo = SIG;
+	// Cruical is that the signal carries the pointer to this class instance here
+	// because the handler just handles anything that comes in!
+	sev.sigev_value.sival_ptr = this;
+	// create the timer
+	if (timer_create(CLOCKID, &sev, &timerid) == -1)
+		throw("Could not create timer");
+};
+
+void CppTimer::start(long nanosecs,std::function<void()> callbackIn, int type) {
+	switch(type){
+		case(PERIODIC):
+			//starts after specified period of nanoseconds
+			its.it_value.tv_sec = nanosecs / 1000000000;
+			its.it_value.tv_nsec = nanosecs % 1000000000;
+			its.it_interval.tv_sec = nanosecs / 1000000000;
+			its.it_interval.tv_nsec = nanosecs % 1000000000;
+			break;
+		case(ONESHOT):
+			//fires once after specified period of nanoseconds
+			its.it_value.tv_sec = nanosecs / 1000000000;
+			its.it_value.tv_nsec = nanosecs % 1000000000;
+			its.it_interval.tv_sec = 0;
+			its.it_interval.tv_nsec = 0;
+			break;
+	}
+	callback = callbackIn;
+	if (timer_settime(timerid, 0, &its, NULL) == -1)
+		throw("Could not start timer");
+	discardPipe();
+	running = true;
+}
+
+void CppTimer::discardPipe() {
+	char buf;
+	fcntl(pipeFd[0], F_SETFL, O_NONBLOCK);
+	while(read(pipeFd[0], &buf, 1) > 0);
+	fcntl(pipeFd[0], F_SETFL, 0);
+}
+
+void CppTimer::block()
+{
+	if(running)
+	{
+		char buf;
+		read(pipeFd[0], &buf, 1);
+	}
+}
+
+void CppTimer::stop() {
+	// disarm
+	struct itimerspec itsnew;
+	itsnew.it_value.tv_sec = 0;
+	itsnew.it_value.tv_nsec = 0;
+	itsnew.it_interval.tv_sec = 0;
+	itsnew.it_interval.tv_nsec = 0;
+	timer_settime(timerid, 0, &itsnew, &its);
+	running = false;
+}
+
+bool CppTimer::isRunning()
+{
+	return running;
+}
+
+CppTimer::~CppTimer() {
+	stop();
+	// delete the timer
+	timer_delete(timerid);
+	// default action for signal handling
+	signal(SIG, SIG_IGN);
+}