62 lines
2.0 KiB
C++
62 lines
2.0 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: https://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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#include <sstream>
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#include <string>
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#include <sys/types.h>
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#include "common.h"
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#include "memory.h"
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std::string mem_string() {
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// These values are in bytes
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int64_t total_mem = 0;
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int64_t used_mem = 0;
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int64_t unused_mem = 0;
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int32_t inactive_mem = 0;
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int32_t active_mem = 0;
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int32_t free_mem = 0;
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int32_t wired_mem = 0;
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int32_t page_size = 0;
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int32_t cache_mem = 0;
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std::ostringstream oss;
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// Get total physical memory, page size, and some other needed info
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GETSYSCTL("hw.realmem", total_mem);
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GETSYSCTL("hw.pagesize", page_size);
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GETSYSCTL("vm.stats.vm.v_free_count", free_mem);
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GETSYSCTL("vm.stats.vm.v_inactive_count", inactive_mem);
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GETSYSCTL("vm.stats.vm.v_cache_count", cache_mem);
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GETSYSCTL("vm.stats.vm.v_wire_count", wired_mem);
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GETSYSCTL("vm.stats.vm.v_active_count", active_mem);
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// Get all memory which can be allocated
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//unused_mem = (cache_mem + free_mem) * page_size;
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used_mem = (
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static_cast<int64_t>(active_mem) + static_cast<int64_t>(inactive_mem) +
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static_cast<int64_t>(wired_mem)) * static_cast<int64_t>(page_size);
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oss << MEGABYTES(used_mem) << '/' << MEGABYTES(total_mem) << "MB";
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return oss.str();
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}
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