240752d800
Since the headers for cpu, memory and load functions are virtually the same for all platforms, I've decided to move them into common/ dir and do some refacotring: * removed per-platform header files * implemented get_cpu_count() function across all platforms. We are using it cpu on every platform, yet not on every one this was implemented as a separate function. * removed platform detection through preprocessor from main: we don't need this there anymore, since the headers are common for all platforms. CMake will handle setting of correct source files for us now. * Unified used defines for CPU states across all platforms and made linux use them. Added some platform detection to cpu.h in order to set them correctly across the platforms. * moved getsysctl.h to common/ dir, since it's used on Net and Free BSD, and thus become a common include.
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/* vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
|
|
*
|
|
* Copyright 2012 Matthew McCormick
|
|
* Copyright 2015 Pawel 'l0ner' Soltys
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <string>
|
|
#include <fstream>
|
|
#include <unistd.h> // usleep
|
|
|
|
#include "cpu.h"
|
|
#include "luts.h"
|
|
|
|
uint8_t get_cpu_count()
|
|
{
|
|
return sysconf( _SC_NPROCESSORS_ONLN );
|
|
}
|
|
|
|
float cpu_percentage( unsigned cpu_usage_delay )
|
|
{
|
|
std::string line;
|
|
size_t substr_start = 0;
|
|
size_t substr_len;
|
|
|
|
// cpu stats
|
|
// user, nice, system, idle
|
|
// in that order
|
|
unsigned long long stats[CP_STATES];
|
|
|
|
std::ifstream stat_file( "/proc/stat" );
|
|
getline( stat_file, line );
|
|
stat_file.close();
|
|
|
|
// skip "cpu"
|
|
substr_len = line.find_first_of( " ", 3 );
|
|
// parse cpu line
|
|
for( unsigned i=0; i < 4; i++ )
|
|
{
|
|
substr_start = line.find_first_not_of( " ", substr_len );
|
|
substr_len = line.find_first_of( " ", substr_start );
|
|
stats[i] = std::stoll( line.substr( substr_start, substr_len ) );
|
|
}
|
|
|
|
usleep( cpu_usage_delay );
|
|
|
|
stat_file.open( "/proc/stat" );
|
|
getline( stat_file, line );
|
|
stat_file.close();
|
|
|
|
// skip "cpu"
|
|
substr_len = line.find_first_of( " ", 3 );
|
|
// parse cpu line
|
|
for( unsigned i=0; i < 4; i++ )
|
|
{
|
|
substr_start = line.find_first_not_of( " ", substr_len );
|
|
substr_len = line.find_first_of ( " ", substr_start );
|
|
stats[i] = std::stoll( line.substr( substr_start, substr_len ) ) - stats[i];
|
|
}
|
|
|
|
return static_cast<float>(
|
|
stats[CP_USER] + stats[CP_NICE] + stats[CP_SYS]
|
|
) / static_cast<float>(
|
|
stats[CP_USER] + stats[CP_NICE] + stats[CP_SYS] + stats[CP_IDLE]
|
|
) * 100.0;
|
|
}
|
|
|