109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
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#include "TracySysTime.hpp"
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#ifdef TRACY_HAS_SYSTIME
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# if defined _WIN32 || defined __CYGWIN__
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# include <windows.h>
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# elif defined __linux__
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# include <stdio.h>
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# include <inttypes.h>
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# elif defined __APPLE__
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# include <mach/mach_host.h>
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# include <mach/host_info.h>
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# elif defined BSD
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# include <sys/types.h>
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# include <sys/sysctl.h>
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# endif
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namespace tracy
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{
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# if defined _WIN32 || defined __CYGWIN__
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static inline uint64_t ConvertTime( const FILETIME& t )
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{
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return ( uint64_t( t.dwHighDateTime ) << 32 ) | uint64_t( t.dwLowDateTime );
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}
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void SysTime::ReadTimes()
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{
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FILETIME idleTime;
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FILETIME kernelTime;
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FILETIME userTime;
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GetSystemTimes( &idleTime, &kernelTime, &userTime );
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idle = ConvertTime( idleTime );
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const auto kernel = ConvertTime( kernelTime );
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const auto user = ConvertTime( userTime );
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used = kernel + user;
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}
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# elif defined __linux__
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void SysTime::ReadTimes()
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{
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uint64_t user, nice, system;
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FILE* f = fopen( "/proc/stat", "r" );
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if( f )
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{
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int read = fscanf( f, "cpu %" PRIu64 " %" PRIu64 " %" PRIu64" %" PRIu64, &user, &nice, &system, &idle );
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fclose( f );
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if (read == 4)
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{
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used = user + nice + system;
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}
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}
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}
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# elif defined __APPLE__
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void SysTime::ReadTimes()
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{
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host_cpu_load_info_data_t info;
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mach_msg_type_number_t cnt = HOST_CPU_LOAD_INFO_COUNT;
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host_statistics( mach_host_self(), HOST_CPU_LOAD_INFO, reinterpret_cast<host_info_t>( &info ), &cnt );
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used = info.cpu_ticks[CPU_STATE_USER] + info.cpu_ticks[CPU_STATE_NICE] + info.cpu_ticks[CPU_STATE_SYSTEM];
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idle = info.cpu_ticks[CPU_STATE_IDLE];
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}
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# elif defined BSD
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void SysTime::ReadTimes()
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{
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u_long data[5];
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size_t sz = sizeof( data );
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sysctlbyname( "kern.cp_time", &data, &sz, nullptr, 0 );
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used = data[0] + data[1] + data[2] + data[3];
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idle = data[4];
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}
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#endif
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SysTime::SysTime()
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{
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ReadTimes();
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}
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float SysTime::Get()
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{
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const auto oldUsed = used;
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const auto oldIdle = idle;
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ReadTimes();
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const auto diffIdle = idle - oldIdle;
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const auto diffUsed = used - oldUsed;
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#if defined _WIN32 || defined __CYGWIN__
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return diffUsed == 0 ? -1 : ( diffUsed - diffIdle ) * 100.f / diffUsed;
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#elif defined __linux__ || defined __APPLE__ || defined BSD
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const auto total = diffUsed + diffIdle;
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return total == 0 ? -1 : diffUsed * 100.f / total;
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#endif
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}
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}
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#endif
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