os: Time abstractions.
Simplified version of u_time.[ch]
This commit is contained in:
José Fonseca
@@ -49,6 +49,7 @@ C_SOURCES = \
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indices/u_indices_gen.c \
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indices/u_unfilled_gen.c \
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os/os_misc.c \
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os/os_time.c \
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pipebuffer/pb_buffer_malloc.c \
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pipebuffer/pb_bufmgr_alt.c \
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pipebuffer/pb_bufmgr_cache.c \
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@@ -83,6 +83,7 @@ source = [
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'indices/u_indices_gen.c',
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'indices/u_unfilled_gen.c',
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'os/os_misc.c',
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'os/os_time.c',
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'pipebuffer/pb_buffer_fenced.c',
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'pipebuffer/pb_buffer_malloc.c',
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'pipebuffer/pb_bufmgr_alt.c',
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@@ -0,0 +1,128 @@
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/**************************************************************************
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*
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* Copyright 2008-2010 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* OS independent time-manipulation functions.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#include "pipe/p_config.h"
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#if !defined(PIPE_OS_EMBEDDED)
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#if defined(PIPE_OS_LINUX) || defined(PIPE_OS_BSD) || defined(PIPE_OS_SOLARIS) || defined(PIPE_OS_APPLE) || defined(PIPE_OS_HAIKU)
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# include <sys/time.h> /* timeval */
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
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# include <windows.h>
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# include <winddi.h>
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
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# include <windows.h>
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extern VOID KeQuerySystemTime(PLARGE_INTEGER);
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
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# include <windows.h>
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#else
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# error Unsupported OS
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#endif
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#include "os_time.h"
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int64_t
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os_time_get(void)
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{
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#if defined(PIPE_OS_UNIX)
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_usec + tv.tv_sec*1000000LL;
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
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static LONGLONG frequency;
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LONGLONG counter;
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if(!frequency)
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EngQueryPerformanceFrequency(&frequency);
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EngQueryPerformanceCounter(&counter);
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return counter*INT64_C(1000000)/frequency;
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
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static LARGE_INTEGER frequency;
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LARGE_INTEGER counter;
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if(!frequency.QuadPart)
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QueryPerformanceFrequency(&frequency);
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QueryPerformanceCounter(&counter);
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return counter.QuadPart*INT64_C(1000000)/frequency.QuadPart;
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
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/* Updated every 10 miliseconds, measured in units of 100 nanoseconds.
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* http://msdn.microsoft.com/en-us/library/ms801642.aspx */
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LARGE_INTEGER counter;
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KeQuerySystemTime(&counter);
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return counter.QuadPart/10;
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#endif
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}
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#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
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void
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os_time_sleep(int64_t usecs)
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{
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static LONGLONG frequency;
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LONGLONG start, curr, end;
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EngQueryPerformanceCounter(&start);
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if(!frequency)
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EngQueryPerformanceFrequency(&frequency);
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end = start + (usecs * frequency + 999999LL)/1000000LL;
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do {
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EngQueryPerformanceCounter(&curr);
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} while(start <= curr && curr < end ||
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end < start && (curr < end || start <= curr));
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}
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#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
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void
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os_time_sleep(int64_t usecs)
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{
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Sleep((usecs + 999) / 1000);
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}
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#endif
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#endif /* !PIPE_OS_EMBEDDED */
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@@ -0,0 +1,92 @@
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/**************************************************************************
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*
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* Copyright 2008-2010 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* OS independent time-manipulation functions.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#ifndef _OS_TIME_H_
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#define _OS_TIME_H_
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#include "pipe/p_config.h"
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#if defined(PIPE_OS_UNIX)
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# include <unistd.h> /* usleep */
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#endif
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#include "pipe/p_compiler.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Get the current time in microseconds from an unknown base.
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*/
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int64_t
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os_time_get(void);
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/*
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* Sleep.
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*/
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#if defined(PIPE_OS_UNIX)
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#define os_time_sleep(_usecs) usleep(_usecs)
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#else
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void
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os_time_sleep(int64_t usecs);
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#endif
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/*
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* Helper function for detecting time outs, taking in account overflow.
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*
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* Returns true the the current time has elapsed beyond the specified interval.
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*/
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static INLINE boolean
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os_time_timeout(int64_t start,
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int64_t end,
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int64_t curr)
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{
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if(start <= end)
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return !(start <= curr && curr < end);
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else
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return !((start <= curr) || (curr < end));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _OS_TIME_H_ */
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