60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
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/*
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* Copyright 2012 Matthew McCormick
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* */
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// This file was Authored by Justin Crawford <Justasic@gmail.com>
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// Based on: github.com/freebsd/freebsd/blob/master/usr.bin/top/machine.c
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// Based on: Apple.cpp for load_string/mem_string and apple's documentation
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#ifndef BSD_METER_COMMON_H_
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#define BSD_METER_COMMON_H_
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#include <iostream>
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#include <cerrno>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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// Memory Sizes
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#define KILOBYTES(x) ((x)/1024)
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#define MEGABYTES(x) (KILOBYTES((x))/1024)
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#define GIGABYTES(x) (MEGABYTES((x))/1024)
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// CPU percentages stuff
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#define CP_USER 0
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#define CP_NICE 1
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#define CP_SYS 2
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#define CP_INTR 3
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#define CP_IDLE 4
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#define CPUSTATES 5
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#define GETSYSCTL(name, var) getsysctl(name, &(var), sizeof(var))
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static inline void getsysctl(const char *name, void *ptr, size_t len) {
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size_t nlen = len;
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if (sysctlbyname(name, ptr, &nlen, NULL, 0) == -1) {
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std::cerr << "sysctl(" << name << "...) failed: " << strerror(errno)
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<< std::endl;
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exit(23);
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}
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if (nlen != len) {
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std::cerr << "sysctl(" << name << "...) expected "
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<< static_cast<unsigned long>(len) << " bytes, got "
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<< static_cast<unsigned long>(nlen) << " bytes\n";
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//exit(23);
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}
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}
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#endif
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