X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Ftimer.cc;fp=src%2Flib%2Ftimer.cc;h=a45e80dcb0bdb46e9fe03b58459b0bd485c8cc5e;hb=bb767c7e338414beee132af3e96829c1448e214b;hp=0000000000000000000000000000000000000000;hpb=66c9be6bdb1361e5681e094a0c8170d268aa9518;p=dcpomatic.git

diff --git a/src/lib/timer.cc b/src/lib/timer.cc
new file mode 100644
index 000000000..a45e80dcb
--- /dev/null
+++ b/src/lib/timer.cc
@@ -0,0 +1,89 @@
+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file src/timer.cc
+ *  @brief Some timing classes for debugging and profiling.
+ */
+
+#include <iostream>
+#include <sys/time.h>
+#include "timer.h"
+#include "util.h"
+
+using namespace std;
+
+/** @param n Name to use when giving output */
+PeriodTimer::PeriodTimer (string n)
+	: _name (n)
+{
+	gettimeofday (&_start, 0);
+}
+
+/** Destroy PeriodTimer and output the time elapsed since its construction */
+PeriodTimer::~PeriodTimer ()
+{
+	struct timeval stop;
+	gettimeofday (&stop, 0);
+	cout << "T: " << _name << ": " << (seconds (stop) - seconds (_start)) << "\n";
+}
+
+/** @param n Name to use when giving output.
+ *  @param s Initial state.
+ */
+StateTimer::StateTimer (string n, string s)
+	: _name (n)
+{
+	struct timeval t;
+	gettimeofday (&t, 0);
+	_time = seconds (t);
+	_state = s;
+}
+
+/** @param s New state that the caller is in */
+void
+StateTimer::set_state (string s)
+{
+	double const last = _time;
+	struct timeval t;
+	gettimeofday (&t, 0);
+	_time = seconds (t);
+
+	if (_totals.find (s) == _totals.end ()) {
+		_totals[s] = 0;
+	}
+
+	_totals[_state] += _time - last;
+	_state = s;
+}
+
+/** Destroy StateTimer and generate a summary of the state timings on cout */
+StateTimer::~StateTimer ()
+{
+	if (_state.empty ()) {
+		return;
+	}
+
+	
+	set_state ("");
+
+	cout << _name << ":\n";
+	for (map<string, double>::iterator i = _totals.begin(); i != _totals.end(); ++i) {
+		cout << "\t" << i->first << " " << i->second << "\n";
+	}
+}