69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
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/*
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* Copyright (C) 2017 - 2018 Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice(s),
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice(s),
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <cstring>
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#include <fstream>
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class ProcStat
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{
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public:
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size_t get_virtual_memory_size_bytes()
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{
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get_stat("VmSize", str_value);
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return strtol(str_value, NULL, 10) * 1024;
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}
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size_t get_physical_memory_size_bytes()
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{
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get_stat("VmRSS", str_value);
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return strtol(str_value, NULL, 10) * 1024;
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}
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private:
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/* We are avoiding to allocate local buffers,
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* since it can produce noise in memory footprint tests.
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*/
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char line[1024];
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char current_entry_name[1024];
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char str_value[1024];
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// Note: this function is not thread-safe.
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void get_stat(const char *field_name, char *value)
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{
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char *pos = nullptr;
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std::ifstream file("/proc/self/status", std::ifstream::in);
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if (file.is_open()) {
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while (file.getline(line, sizeof(line))) {
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pos = strstr(line, field_name);
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if (pos) {
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sscanf(pos, "%64[a-zA-Z_0-9()]: %s", current_entry_name, value);
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break;
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}
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}
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file.close();
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}
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}
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};
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