1855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi/* 2855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * Copyright (C) 2011 The Android Open Source Project 3855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * 4855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * Licensed under the Apache License, Version 2.0 (the "License"); 5855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * you may not use this file except in compliance with the License. 6855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * You may obtain a copy of the License at 7855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * 8855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * http://www.apache.org/licenses/LICENSE-2.0 9855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * 10855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * Unless required by applicable law or agreed to in writing, software 11855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * distributed under the License is distributed on an "AS IS" BASIS, 12855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * See the License for the specific language governing permissions and 14855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * limitations under the License. 15855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi */ 16855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 17855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 18855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi/** 19855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 20855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @file M4OSA_Clock.c 21855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @brief Clock related functions 22855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @note This file implements functions to manipulate clock 23855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 24855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi*/ 25855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 26855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <sys/time.h> 27855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <time.h> 28855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 29855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Debug.h" 30855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Clock.h" 31855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Memory.h" 32855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Types.h" 33855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 34855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 35855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 36855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 37855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi/** 38855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 39855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @brief This function gets an absolute time to an unknown reference with 40855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * a high precision. 41855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @note It means it can only be used to get a relative time by computing 42855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * differences between to times. 43855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * It is to the caller to allocate time. Time is expressed in 44855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * timescale unit. 45855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * M4OSA_ROLLOVER_CLOCK in M4OSA_Types.h must be configured with the rollover 46855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * offset of this function. 47855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @param time: (IN/OUT) time 48855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @param timescale: (IN) The timescale (time unit per second) 49855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @return M4NO_ERROR: there is no error 50855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @return M4ERR_PARAMETER: at least one parameter is NULL 51855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @return M4WAR_TIMESCALE_TOO_BIG: the precision of the system clock is 52855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * not 53855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * compliant with the input timescale 54855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 55855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi*/ 56855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray KundargiM4OSA_ERR M4OSA_clockGetTime(M4OSA_Time* pTime, M4OSA_UInt32 timescale) 57855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi{ 58855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi struct timeval tv; 59855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi struct timezone tz; 60855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_UInt32 u32_time = 0; 61855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_UInt32 u32_time_hi; 62855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_UInt32 u32_time_lo; 63855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_UInt32 u32_time_lh; 64855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_UInt32 factor; 65855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 66855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_TRACE1_2("M4OSA_clockGetTime\t\tM4OSA_Time* 0x%x\tM4OSA_UInt32 %d", 67855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi pTime, timescale); 68855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 69855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_DEBUG_IF2(M4OSA_NULL == pTime, M4ERR_PARAMETER, 70855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi "M4OSA_clockGetTime: pTime is M4OSA_NULL"); 71855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi M4OSA_DEBUG_IF2(0 == timescale, M4ERR_PARAMETER, 72855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi "M4OSA_clockGetTime: timescale is 0"); 73855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 74855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi factor = 1000000 / timescale; 75855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 76855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi if(gettimeofday(&tv, &tz) == 0) 77855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi { 78855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_lo = (tv.tv_sec & 0xFFFF) * timescale; 79855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_hi = (((tv.tv_sec >> 16) & 0xFFFF) * timescale) + ((u32_time_lo >> 16) & 0xFFFF); 80855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_lo &= 0xFFFF; 81855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_lo += tv.tv_usec / factor; 82855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_hi += ((u32_time_lo >> 16) & 0xFFFF); 83855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time_lo &= 0xFFFF; 84855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time = ((u32_time_hi & 0x7FFF) << 16) | u32_time_lo; 85855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi } 86855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 87855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi /* M4OSA_Time is signed, so we need to check the max value*/ 88855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi if (u32_time > M4OSA_INT32_MAX) 89855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi { 90855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi u32_time = u32_time - M4OSA_INT32_MAX; 91855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi } 92855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 93855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi *pTime = (M4OSA_Time)u32_time; 94855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 95855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi if( timescale > 10000 ) 96855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi { 97855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi return M4WAR_TIMESCALE_TOO_BIG; 98855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi } 99855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 100855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi return M4NO_ERROR; 101855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi} 102