From afb8dbf0b074b16382e23c1ecabcbf5b650e1dab Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Sun, 26 Sep 2010 03:05:06 -0400 Subject: Add a timer API to libdimension. --- libdimension/timer.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 libdimension/timer.c (limited to 'libdimension/timer.c') diff --git a/libdimension/timer.c b/libdimension/timer.c new file mode 100644 index 0000000..eb15357 --- /dev/null +++ b/libdimension/timer.c @@ -0,0 +1,64 @@ +/************************************************************************* + * Copyright (C) 2009-2010 Tavian Barnes * + * * + * This file is part of The Dimension Library. * + * * + * The Dimension Library is free software; you can redistribute it and/ * + * or modify it under the terms of the GNU Lesser General Public License * + * as published by the Free Software Foundation; either version 3 of the * + * License, or (at your option) any later version. * + * * + * The Dimension Library 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 * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this program. If not, see * + * . * + *************************************************************************/ + +#include "dimension.h" +#include +#include + +static long clk_tck = 0; + +dmnsn_timer * +dmnsn_new_timer() +{ + /* Figure out the clock ticks per second */ + if (!clk_tck) { + clk_tck = sysconf(_SC_CLK_TCK); + if (clk_tck == -1) { + dmnsn_error(DMNSN_SEVERITY_MEDIUM, "sysconf(_SC_CLK_TCK) failed."); + clk_tck = 1000000L; + } + } + + dmnsn_timer *timer = dmnsn_malloc(sizeof(dmnsn_timer)); + + struct tms buf; + clock_t real = times(&buf); + timer->real = (double)real/clk_tck; + timer->user = (double)buf.tms_utime/clk_tck; + timer->system = (double)buf.tms_stime/clk_tck; + + return timer; +} + +void +dmnsn_complete_timer(dmnsn_timer *timer) +{ + struct tms buf; + clock_t real = times(&buf); + timer->real = (double)real/clk_tck - timer->real; + timer->user = (double)buf.tms_utime/clk_tck - timer->user; + timer->system = (double)buf.tms_stime/clk_tck - timer->system; +} + +void +dmnsn_delete_timer(dmnsn_timer *timer) +{ + dmnsn_free(timer); +} -- cgit v1.2.3