116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
/**
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* XMPP - libpurple transport
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*
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* Copyright (C) 2009, Jan Kaluza <hanzz@soc.pidgin.im>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
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*/
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#include "memoryusage.h"
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#include <iostream>
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#include <cstring>
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#include <sstream>
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#include <fstream>
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#include <algorithm>
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#ifndef WIN32
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#include <sys/param.h>
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#endif
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#ifdef BSD
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#endif
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namespace Transport {
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#ifndef WIN32
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#ifdef BSD
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void process_mem_usage(double& vm_usage, double& resident_set) {
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int mib[4];
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size_t size;
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_PID;
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mib[3] = getpid();
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struct kinfo_proc proc;
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size = sizeof(struct kinfo_proc);
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if (sysctl((int*)mib, 4, &proc, &size, NULL, 0) == -1) {
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vm_usage = 0;
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resident_set = 0;
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return;
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}
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// sysctl stores 0 in the size if we can't find the process information.
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// Set errno to ESRCH which will be translated in NoSuchProcess later on.
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if (size == 0) {
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vm_usage = 0;
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resident_set = 0;
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return;
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}
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int pagesize,cnt;
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size = sizeof(pagesize);
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sysctlbyname("hw.pagesize", &pagesize, &size, NULL, 0);
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resident_set = (double) (proc.ki_rssize * pagesize / 1024);
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vm_usage = (double) proc.ki_size;
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}
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#else /* BSD */
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void process_mem_usage(double& shared, double& resident_set) {
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using std::ios_base;
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using std::ifstream;
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using std::string;
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shared = 0.0;
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resident_set = 0.0;
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// 'file' stat seems to give the most reliable results
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//
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ifstream stat_stream("/proc/self/statm",ios_base::in);
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if (!stat_stream.is_open()) {
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shared = 0;
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resident_set = 0;
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return;
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}
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// dummy vars for leading entries in stat that we don't care about
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//
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string pid, comm, state, ppid, pgrp, session, tty_nr;
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string tpgid, flags, minflt, cminflt, majflt, cmajflt;
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string utime, stime, cutime, cstime, priority, nice;
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string O, itrealvalue, starttime;
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// the two fields we want
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//
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unsigned long shared_;
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long rss;
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stat_stream >> O >> rss >> shared_; // don't care about the rest
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long page_size_kb = sysconf(_SC_PAGE_SIZE) / 1024; // in case x86-64 is configured to use 2MB pages
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shared = shared_ * page_size_kb;
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resident_set = rss * page_size_kb;
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}
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#endif /* else BSD */
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#endif /* WIN32 */
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}
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