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 * @file M4PSW_Trace.c 19855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @brief Trace function for trace macros 20855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @note This file gives the implementation of the trace function used 21855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * in the trace instrumentation macros 22855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 23855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi*/ 24855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 25855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <stdio.h> /*for printf */ 26855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <stdarg.h> /* ANSI C macros and defs for variable args */ 27855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <stdlib.h> 28855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <string.h> 29855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include <time.h> 30855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 31855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Types.h" 32855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Error.h" 33855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Memory.h" 34855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi#include "M4OSA_Mutex.h" 35855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi/** 36855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 37855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @fn M4OSA_ERR M4OSA_randInit() 38855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @brief this function initialize the number generator 39855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * this function must be called once before any call to M4OSA_rand() 40855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * need the stdlib and time libraries 41855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @note 42855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @param 43855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @return M4NO_ERROR 44855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 45855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi*/ 46855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 47855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray KundargiM4OSA_ERR M4OSA_randInit() 48855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi{ 49855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi int i; 50855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 51855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi srand(time(NULL)); 52855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 53855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi /* Windows' rand is rotten, the first generated value after the init 54855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi above is not random enough, so let's shake things a little... */ 55855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 56855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi for (i=0; i<100; i++) rand(); 57855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 58855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi return M4NO_ERROR; 59855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi} 60855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi/** 61855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 62855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @fn M4OSA_ERR M4OSA_rand(M4OSA_Int32* out_value, M4OSA_UInt32 max_value) 63855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @brief This function gives a random number between 1 and max_value 64855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * (inclusive) with approximately equal probability, and 65855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * returns this number in out_value. For instance, a max_value 66855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * of 6 will simulate a fair 6-sided dice roll. 67855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @note 68855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @param out_value (OUT): on return, points to random result 69855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @param max_value (IN): max expected value 70855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi * @return M4NO_ERROR 71855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi ************************************************************************ 72855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi*/ 73855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 74855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray KundargiM4OSA_ERR M4OSA_rand(M4OSA_Int32* out_value, M4OSA_UInt32 max_value) 75855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi{ 76855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi if( (out_value == M4OSA_NULL) || (max_value < 1) ) 77855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi { 78855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi return M4ERR_PARAMETER; 79855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi } 80855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 81855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi (*out_value) = rand(); 82855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi /* notice this algorithm will only work for max_values such that the multiplication 83855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi won't overflow, which means that max_value typically shouldn't go over the range of 84855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi an Int16. */ 85855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi (*out_value) = (((*out_value) * max_value) / ((M4OSA_UInt32)RAND_MAX + 1)) + 1; 86855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 87855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi return M4NO_ERROR; 88855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi} 89855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 90855ec7c4be7ad642721909d5837a8d25a117c22fDharmaray Kundargi 91