+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2008-2010 VMware, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-
-/**
- * @file
- * OS independent time-manipulation functions.
- *
- * @author Jose Fonseca <jfonseca@vmware.com>
- */
-
-#ifndef _OS_TIME_H_
-#define _OS_TIME_H_
-
-
-#include "pipe/p_config.h"
-
-#if defined(PIPE_OS_UNIX)
-# include <unistd.h> /* usleep */
-#endif
-
-#include "pipe/p_compiler.h"
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-/*
- * Get the current time in nanoseconds from an unknown base.
- */
-int64_t
-os_time_get_nano(void);
-
-
-/*
- * Get the current time in microseconds from an unknown base.
- */
-static inline int64_t
-os_time_get(void)
-{
- return os_time_get_nano() / 1000;
-}
-
-
-/*
- * Sleep.
- */
-void
-os_time_sleep(int64_t usecs);
-
-
-/*
- * Helper function for detecting time outs, taking in account overflow.
- *
- * Returns true if the current time has elapsed beyond the specified interval.
- */
-static inline boolean
-os_time_timeout(int64_t start,
- int64_t end,
- int64_t curr)
-{
- if (start <= end)
- return !(start <= curr && curr < end);
- else
- return !((start <= curr) || (curr < end));
-}
-
-
-/**
- * Convert a relative timeout in nanoseconds into an absolute timeout,
- * in other words, it returns current time + timeout.
- * os_time_get_nano() must be monotonic.
- * PIPE_TIMEOUT_INFINITE is passed through unchanged. If the calculation
- * overflows, PIPE_TIMEOUT_INFINITE is returned.
- */
-int64_t
-os_time_get_absolute_timeout(uint64_t timeout);
-
-
-/**
- * Wait until the variable at the given memory location is zero.
- *
- * \param var variable
- * \param timeout timeout in ns, can be anything from 0 (no wait) to
- * PIPE_TIME_INFINITE (wait forever)
- * \return true if the variable is zero
- */
-bool
-os_wait_until_zero(volatile int *var, uint64_t timeout);
-
-
-/**
- * Wait until the variable at the given memory location is zero.
- * The timeout is the absolute time when the waiting should stop. If it is
- * less than or equal to the current time, it only returns the status and
- * doesn't wait. PIPE_TIME_INFINITE waits forever. This requires that
- * os_time_get_nano is monotonic.
- *
- * \param var variable
- * \param timeout the time in ns when the waiting should stop
- * \return true if the variable is zero
- */
-bool
-os_wait_until_zero_abs_timeout(volatile int *var, int64_t timeout);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _OS_TIME_H_ */
projects / mesa.git / blobdiff