47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
#include <string>
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#include <sstream>
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#include <unistd.h> // sysconf()?
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#include <sys/sysinfo.h>
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#include <linux/kernel.h> // SI_LOAD_SHIFT
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#include "load.h"
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#include "../luts.h"
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std::string load_string( bool use_colors = false ) {
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std::ostringstream oss;
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float f = static_cast<float>(1 << SI_LOAD_SHIFT);
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struct sysinfo sinfo;
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sysinfo(&sinfo);
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if( use_colors ) {
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// Likely does not work on BSD, but not tested
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unsigned number_of_cpus = sysconf( _SC_NPROCESSORS_ONLN );
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float recent_load = sinfo.loads[0] / f;
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// colors range from zero to twice the number of cpu's
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// for the most recent load metric
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unsigned load_percent = static_cast< unsigned int >(
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recent_load / number_of_cpus * 0.5f * 100.0f );
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if( load_percent > 100 )
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load_percent = 100;
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oss << load_lut[load_percent];
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}
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// set precision so we get results like "0.22"
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oss.setf( std::ios::fixed );
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oss.precision(2);
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oss << sinfo.loads[0] / f << " " << sinfo.loads[1] / f << " "
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<< sinfo.loads[2] / f;
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if( use_colors )
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oss << "#[fg=default,bg=default]";
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return oss.str();
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}
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