Initial import

[umurmur.git] / src / timer.c

diff --git a/src/timer.c b/src/timer.c
new file mode 100644 (file)
index 0000000..53542c1
--- /dev/null
+++ b/src/timer.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 2009, Martin Johansson <martin@fatbob.nu>
+   Copyright (C) 2005-2009, Thorvald Natvig <thorvald@natvig.com>
+
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   - 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.
+   - Neither the name of the Developers nor the names of its contributors may
+     be used to endorse or promote products derived from this software without
+     specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE FOUNDATION 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 <stdint.h>
+#include <stdio.h>
+
+#include "timer.h"
+
+static uint64_t Timer_now()
+{
+       struct timeval tv;
+       uint64_t e;
+       
+       gettimeofday(&tv, NULL);
+       e = tv.tv_sec * 1000000LL;
+       e += tv.tv_usec;
+       return e;
+}
+
+
+void Timer_init(etimer_t *t)
+{
+       *t = Timer_now();
+}
+
+bool_t Timer_isElapsed(etimer_t *t, uint64_t us)
+{
+       if (Timer_elapsed(t) > us) {
+               *t += us;
+               return true;
+       }
+       return false;
+
+}
+
+uint64_t Timer_elapsed(etimer_t *t)
+{
+       return Timer_now() - *t;
+}
+
+uint64_t Timer_restart(etimer_t *t)
+{
+       uint64_t n = Timer_now();
+       uint64_t e = n - *t;
+       *t = n;
+       return e;
+}