79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Portable abstraction for high-resolution time handling (implementation)
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*/
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#include "hptime.h"
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#if defined(_WIN32)
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#include <windows.h>
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hptime_t hptime_get(void)
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{
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FILETIME ft;
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/*
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* La precisione dei FileTime sarebbe 100ns, ma il
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* valore viene ottenuto convertendo una struttura
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* SYSTEMTIME, che ha precisione di 1ms. Il numero
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* che otteniamo e' quindi sempre un multiplo di
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* 100000.
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*/
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GetSystemTimeAsFileTime(&ft);
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/* Copy the upper/lower into a quadword. */
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return (((hptime_t)ft.dwHighDateTime) << 32) + (hptime_t)ft.dwLowDateTime;
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}
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#elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
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#include <sys/time.h> /* for gettimeofday() */
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#include <stddef.h> /* for NULL */
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hptime_t hptime_get(void)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (hptime_t)tv.tv_sec * HPTIME_TICKS_PER_SECOND
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+ (hptime_t)tv.tv_usec;
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}
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#else /* !__unix__ */
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#error OS dependent support code missing for this OS
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#endif /* !__unix__ */
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