version 3.0

common/timer/Makefile

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+SUBDIR+=
+
+include ../../common/subdir.mk

common/timer/lib.mk

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+VPATH+=	${TOPDIR}/common/timer
+
+SRCS+=	timer.cc

common/timer/timer.cc

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+/*
+ * Copyright (c) 2009-2010 Juli Mallett. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/time.h>
+
+#include <vector>
+
+#include <common/timer/timer.h>
+
+void
+Timer::start(void)
+{
+	struct timeval tv;
+	int rv;
+
+	rv = gettimeofday(&tv, NULL);
+	if (rv == -1)
+		HALT("/timer") << "Could not gettimeofday.";
+	start_ = (tv.tv_sec * 1000 * 1000) + tv.tv_usec;
+}
+
+void
+Timer::stop(void)
+{
+	struct timeval tv;
+	int rv;
+
+	rv = gettimeofday(&tv, NULL);
+	if (rv == -1)
+		HALT("/timer") << "Could not gettimeofday.";
+	stop_ = (tv.tv_sec * 1000 * 1000) + tv.tv_usec;
+
+	samples_.push_back(stop_ - start_);
+}

common/timer/timer.h

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+/*
+ * Copyright (c) 2009-2011 Juli Mallett. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef	COMMON_TIMER_TIMER_H
+#define	COMMON_TIMER_TIMER_H
+
+class Timer {
+	uintmax_t start_;
+	uintmax_t stop_;
+
+	std::vector<uintmax_t> samples_;
+public:
+	Timer(void)
+	: start_(),
+	  stop_(),
+	  samples_()
+	{ }
+
+	~Timer()
+	{ }
+
+	void reset(void)
+	{
+		samples_.clear();
+	}
+
+	void start(void);
+	void stop(void);
+
+	uintmax_t sample(void) const
+	{
+		if (samples_.size() != 1)
+			HALT("/timer") << "Requested 1 sample but " << samples_.size() << " available.";
+		return (samples_[0]);
+	}
+
+	std::vector<uintmax_t> samples(void) const
+	{
+		return (samples_);
+	}
+};
+
+#endif /* !COMMON_TIMER_TIMER_H */