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Add project files.
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‎.gitignore‎

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bin/*
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obj/*
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.vs/*

‎MultiThreadTutorial.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.31606.5
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "MultiThreadTutorial", "MultiThreadTutorial.vcxproj", "{6DB480D1-A8F9-4791-A730-11887F7DCD12}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|x64 = Debug|x64
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Release|x64 = Release|x64
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{6DB480D1-A8F9-4791-A730-11887F7DCD12}.Debug|x64.ActiveCfg = Debug|x64
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{6DB480D1-A8F9-4791-A730-11887F7DCD12}.Debug|x64.Build.0 = Debug|x64
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{6DB480D1-A8F9-4791-A730-11887F7DCD12}.Release|x64.ActiveCfg = Release|x64
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{6DB480D1-A8F9-4791-A730-11887F7DCD12}.Release|x64.Build.0 = Release|x64
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {E77BE9AB-6C3E-400E-949B-4B569E0196CB}
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EndGlobalSection
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EndGlobal

‎MultiThreadTutorial.vcxproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Debug|x64">
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<Configuration>Debug</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|x64">
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<Configuration>Release</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<VCProjectVersion>16.0</VCProjectVersion>
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<Keyword>Win32Proj</Keyword>
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<ProjectGuid>{6db480d1-a8f9-4791-a730-11887f7dcd12}</ProjectGuid>
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<RootNamespace>MultiThreadTutorial</RootNamespace>
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<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v143</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="Shared">
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<LinkIncremental>true</LinkIncremental>
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<OutDir>$(SolutionDir)bin\</OutDir>
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<IntDir>$(SolutionDir)obj\</IntDir>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<LinkIncremental>false</LinkIncremental>
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<OutDir>$(SolutionDir)bin\</OutDir>
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<IntDir>$(SolutionDir)obj\</IntDir>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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<LanguageStandard>stdcpp17</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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<LanguageStandard>stdcpp17</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemGroup>
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<ClCompile Include="src\main.cpp" />
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</ItemGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>
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</Project>

‎MultiThreadTutorial.vcxproj.filters‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup>
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<Filter Include="Source Files">
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<UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
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<Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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</Filter>
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<Filter Include="Header Files">
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<UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
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<Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
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</Filter>
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<Filter Include="Resource Files">
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<UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
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<Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
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</Filter>
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="src\main.cpp">
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<Filter>Source Files</Filter>
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</ClCompile>
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</ItemGroup>
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</Project>

‎MultiThreadTutorial.vcxproj.user‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<ShowAllFiles>true</ShowAllFiles>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<LocalDebuggerWorkingDirectory>$(TargetDir)</LocalDebuggerWorkingDirectory>
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<DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<LocalDebuggerWorkingDirectory>$(TargetDir)</LocalDebuggerWorkingDirectory>
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<DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
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</PropertyGroup>
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</Project>

‎src/main.cpp‎

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#define _USE_MATH_DEFINES
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#include <iostream>
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#include <chrono>
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#include <cmath>
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#include <thread>
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#include <vector>
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#include <cassert>
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// unsigned int doneWork = 0;
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double work(unsigned int idx, double input) {
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// doneWork = doneWork + 1;
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return abs(sin(input * idx)) * input;
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}
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void doWork(double* data, unsigned int count, unsigned int offset = 0) {
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for (unsigned int i = offset; i < count; i++) {
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data[i] = work(i, data[i]);
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}
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}
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void doWorkMT(double* data, unsigned int count, unsigned int threadCount) {
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// Work per thread
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unsigned int wpt = count / threadCount;
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// Schedule word
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std::vector<std::thread> threads;
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for (unsigned int i = 0; i < threadCount; i++) {
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// Create thread
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threads.push_back(std::thread(&doWork, data, wpt, i * wpt));
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}
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// Wait for threads to finish
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for (auto it = threads.begin(); it != threads.end(); it++) {
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it->join();
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}
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}
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int main() {
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// Heavy work count
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const unsigned int workCount = 1024 * 1024 * 32;
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// Genneratew work
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std::cout << "=== GENNERATE WORK ===" << std::endl;
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double* workData = (double*) malloc(sizeof(double) * workCount);
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std::srand(time(0));
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for (unsigned int i = 0; i < workCount; i++) {
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workData[i] = std::rand() / (double)RAND_MAX;
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}
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// Work and time
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std::cout << "=== START WORK ===" << std::endl;
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auto tStart = std::chrono::steady_clock::now();
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doWorkMT(workData, workCount, 8);
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auto tStop = std::chrono::steady_clock::now();
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// Print timing result
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std::cout << std::endl << "Timings: " << std::endl
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<< "NS: " << std::chrono::duration_cast<std::chrono::nanoseconds>(tStop - tStart).count() << std::endl
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<< "US: " << std::chrono::duration_cast<std::chrono::microseconds>(tStop - tStart).count() << std::endl
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<< "MS: " << std::chrono::duration_cast<std::chrono::milliseconds>(tStop - tStart).count() << std::endl
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<< " S: " << std::chrono::duration_cast<std::chrono::seconds>(tStop - tStart).count() << std::endl;
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// Assert my work
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// assert(doneCount == workCount && "Work success");
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// Free
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free(workData);
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return 0;
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}

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