The open source OpenXR runtime
matrixfurry.com
1#include "TracySysTime.hpp"
2
3#ifdef TRACY_HAS_SYSTIME
4
5# if defined _WIN32
6# include <windows.h>
7# elif defined __linux__
8# include <stdio.h>
9# include <inttypes.h>
10# elif defined __APPLE__
11# include <mach/mach_host.h>
12# include <mach/host_info.h>
13# elif defined BSD
14# include <sys/types.h>
15# include <sys/sysctl.h>
16# endif
17
18namespace tracy
19{
20
21# if defined _WIN32
22
23static inline uint64_t ConvertTime( const FILETIME& t )
24{
25 return ( uint64_t( t.dwHighDateTime ) << 32 ) | uint64_t( t.dwLowDateTime );
26}
27
28void SysTime::ReadTimes()
29{
30 FILETIME idleTime;
31 FILETIME kernelTime;
32 FILETIME userTime;
33
34 GetSystemTimes( &idleTime, &kernelTime, &userTime );
35
36 idle = ConvertTime( idleTime );
37 const auto kernel = ConvertTime( kernelTime );
38 const auto user = ConvertTime( userTime );
39 used = kernel + user;
40}
41
42# elif defined __linux__
43
44void SysTime::ReadTimes()
45{
46 uint64_t user, nice, system;
47 FILE* f = fopen( "/proc/stat", "r" );
48 if( f )
49 {
50 int read = fscanf( f, "cpu %" PRIu64 " %" PRIu64 " %" PRIu64" %" PRIu64, &user, &nice, &system, &idle );
51 fclose( f );
52 if (read == 4)
53 {
54 used = user + nice + system;
55 }
56 }
57}
58
59# elif defined __APPLE__
60
61void SysTime::ReadTimes()
62{
63 host_cpu_load_info_data_t info;
64 mach_msg_type_number_t cnt = HOST_CPU_LOAD_INFO_COUNT;
65 host_statistics( mach_host_self(), HOST_CPU_LOAD_INFO, reinterpret_cast<host_info_t>( &info ), &cnt );
66 used = info.cpu_ticks[CPU_STATE_USER] + info.cpu_ticks[CPU_STATE_NICE] + info.cpu_ticks[CPU_STATE_SYSTEM];
67 idle = info.cpu_ticks[CPU_STATE_IDLE];
68}
69
70# elif defined BSD
71
72void SysTime::ReadTimes()
73{
74 u_long data[5];
75 size_t sz = sizeof( data );
76 sysctlbyname( "kern.cp_time", &data, &sz, nullptr, 0 );
77 used = data[0] + data[1] + data[2] + data[3];
78 idle = data[4];
79}
80
81#endif
82
83SysTime::SysTime()
84{
85 ReadTimes();
86}
87
88float SysTime::Get()
89{
90 const auto oldUsed = used;
91 const auto oldIdle = idle;
92
93 ReadTimes();
94
95 const auto diffIdle = idle - oldIdle;
96 const auto diffUsed = used - oldUsed;
97
98#if defined _WIN32
99 return diffUsed == 0 ? -1 : ( diffUsed - diffIdle ) * 100.f / diffUsed;
100#elif defined __linux__ || defined __APPLE__ || defined BSD
101 const auto total = diffUsed + diffIdle;
102 return total == 0 ? -1 : diffUsed * 100.f / total;
103#endif
104}
105
106}
107
108#endif