os_time.h revision 3836857a777a248dd212ce7a1d7307d2984fda7d
12ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca/************************************************************************** 22ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 32ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * Copyright 2008-2010 VMware, Inc. 42ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * All Rights Reserved. 52ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 62ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * Permission is hereby granted, free of charge, to any person obtaining a 72ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * copy of this software and associated documentation files (the 82ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * "Software"), to deal in the Software without restriction, including 92ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * without limitation the rights to use, copy, modify, merge, publish, 102ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * distribute, sub license, and/or sell copies of the Software, and to 112ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * permit persons to whom the Software is furnished to do so, subject to 122ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * the following conditions: 132ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 142ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * The above copyright notice and this permission notice (including the 152ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * next paragraph) shall be included in all copies or substantial portions 162ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * of the Software. 172ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 182ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 192ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 202ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 212ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 222ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 232ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 242ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 252ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 262ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca **************************************************************************/ 272ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 282ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca/** 292ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * @file 302ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * OS independent time-manipulation functions. 312ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 322ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * @author Jose Fonseca <jfonseca@vmware.com> 332ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca */ 342ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 352ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#ifndef _OS_TIME_H_ 362ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#define _OS_TIME_H_ 372ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 382ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 392ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#include "pipe/p_config.h" 402ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 412ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#if defined(PIPE_OS_UNIX) 422ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca# include <unistd.h> /* usleep */ 432ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#endif 442ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 452ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#include "pipe/p_compiler.h" 462ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 472ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 482ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#ifdef __cplusplus 492ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecaextern "C" { 502ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#endif 512ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 522ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 532ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca/* 54d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonseca * Get the current time in nanoseconds from an unknown base. 552ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca */ 562ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecaint64_t 57d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonsecaos_time_get_nano(void); 582ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 592ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 602ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca/* 61d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonseca * Get the current time in microseconds from an unknown base. 6216f0d70ffe6d42d22b9e6b927b297e75a199aa78James Benton */ 63d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonsecastatic INLINE int64_t 64d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonsecaos_time_get(void) { 65122dfc5ee25ec4faf040baf5dc834d144bb3a42cJosé Fonseca return os_time_get_nano() / 1000; 66d296326e065ed9685bd27d62a3ba20d8a8996e6fJosé Fonseca} 6716f0d70ffe6d42d22b9e6b927b297e75a199aa78James Benton 6816f0d70ffe6d42d22b9e6b927b297e75a199aa78James Benton 6916f0d70ffe6d42d22b9e6b927b297e75a199aa78James Benton/* 702ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * Sleep. 712ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca */ 722ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#if defined(PIPE_OS_UNIX) 732ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#define os_time_sleep(_usecs) usleep(_usecs) 742ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#else 752ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecavoid 762ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecaos_time_sleep(int64_t usecs); 772ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#endif 782ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 792ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 802ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca/* 812ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * Helper function for detecting time outs, taking in account overflow. 822ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca * 83fab1f07d6ad01463897ae792f4b33738afb07369Jeff Smith * Returns true if the current time has elapsed beyond the specified interval. 842ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca */ 852ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecastatic INLINE boolean 862ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonsecaos_time_timeout(int64_t start, 872ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca int64_t end, 882ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca int64_t curr) 892ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca{ 902ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca if(start <= end) 912ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca return !(start <= curr && curr < end); 922ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca else 932ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca return !((start <= curr) || (curr < end)); 942ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca} 952ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 962ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 973836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák/** 983836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * Wait until the variable at the given memory location is zero. 993836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * 1003836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * \param var variable 1013836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * \param timeout timeout in ns, can be anything from 0 (no wait) to 1023836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * PIPE_TIME_INFINITE (wait forever) 1033836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák * \return true if the variable is zero 1043836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák */ 1053836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšákbool 1063836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšákos_wait_until_zero(volatile int *var, uint64_t timeout); 1073836857a777a248dd212ce7a1d7307d2984fda7dMarek Olšák 1082ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#ifdef __cplusplus 1092ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca} 1102ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#endif 1112ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca 1122ef6d311b7cba30deb3d7e38eec14cef89e7e579José Fonseca#endif /* _OS_TIME_H_ */ 113