Libosmium  2.7.1
Fast and flexible C++ library for working with OpenStreetMap data
memory.hpp
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1 #ifndef OSMIUM_UTIL_MEMORY_HPP
2 #define OSMIUM_UTIL_MEMORY_HPP
3 
4 /*
5 
6 This file is part of Osmium (http://osmcode.org/libosmium).
7 
8 Copyright 2013-2016 Jochen Topf <jochen@topf.org> and others (see README).
9 
10 Boost Software License - Version 1.0 - August 17th, 2003
11 
12 Permission is hereby granted, free of charge, to any person or organization
13 obtaining a copy of the software and accompanying documentation covered by
14 this license (the "Software") to use, reproduce, display, distribute,
15 execute, and transmit the Software, and to prepare derivative works of the
16 Software, and to permit third-parties to whom the Software is furnished to
17 do so, all subject to the following:
18 
19 The copyright notices in the Software and this entire statement, including
20 the above license grant, this restriction and the following disclaimer,
21 must be included in all copies of the Software, in whole or in part, and
22 all derivative works of the Software, unless such copies or derivative
23 works are solely in the form of machine-executable object code generated by
24 a source language processor.
25 
26 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
29 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
30 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
31 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32 DEALINGS IN THE SOFTWARE.
33 
34 */
35 
36 #include <cstdlib>
37 #include <fstream>
38 #include <string>
39 
40 namespace osmium {
41 
42  class MemoryUsage {
43 
44  int m_current = 0;
45  int m_peak = 0;
46 
47 #ifdef __linux__
48  static int parse_number(const std::string& line) {
49  const auto f = line.find_first_of("0123456789");
50  const auto l = line.find_last_of("0123456789");
51  return std::atoi(line.substr(f, l-f+1).c_str());
52  }
53 #endif
54 
55  public:
56 
66 #ifdef __linux__
67  static const char* filename = "/proc/self/status";
68  std::ifstream status_file(filename);
69 
70  if (status_file.is_open()) {
71  std::string line;
72  while (! status_file.eof() ) {
73  std::getline(status_file, line);
74  if (line.substr(0, 6) == "VmPeak") {
75  m_peak = parse_number(line);
76  }
77  if (line.substr(0, 6) == "VmSize") {
78  m_current = parse_number(line);
79  }
80  }
81  }
82 #endif
83  }
84 
86  int current() const {
87  return m_current / 1024;
88  }
89 
91  int peak() const {
92  return m_peak / 1024;
93  }
94 
95  }; // class MemoryUsage
96 
97 } // namespace osmium
98 
99 #endif // OSMIUM_UTIL_MEMORY_HPP
MemoryUsage()
Definition: memory.hpp:65
Definition: memory.hpp:42
int m_current
Definition: memory.hpp:44
Namespace for everything in the Osmium library.
Definition: assembler.hpp:66
static int parse_number(const std::string &line)
Definition: memory.hpp:48
int m_peak
Definition: memory.hpp:45
int current() const
Return current memory usage in MBytes.
Definition: memory.hpp:86
int peak() const
Return peak memory usage in MBytes.
Definition: memory.hpp:91