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107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
//===- Unix/Process.cpp - Unix Process Implementation --------- -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the generic Unix implementation of the Process class.
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//
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//===----------------------------------------------------------------------===//
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#include "Unix.h"
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on *all* UNIX variants.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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using namespace sys;
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unsigned
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Process::GetPageSize()
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{
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#if defined(HAVE_GETPAGESIZE)
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static const int page_size = ::getpagesize();
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#elif defined(HAVE_SYSCONF)
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static long page_size = ::sysconf(_SC_PAGE_SIZE);
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#else
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#warning Cannot get the page size on this machine
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#endif
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return static_cast<unsigned>(page_size);
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}
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#if defined(HAVE_SBRK)
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static char* som = reinterpret_cast<char*>(::sbrk(0));
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#endif
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uint64_t
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Process::GetMallocUsage()
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{
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#if defined(HAVE_MALLINFO)
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struct mallinfo mi;
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mi = ::mallinfo();
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return mi.uordblks;
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#elif defined(HAVE_SBRK)
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// Note this is only an approximation and more closely resembles
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// the value returned by mallinfo in the arena field.
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char * eom = sbrk(0);
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if (eom != ((char*)-1) && som != ((char*)-1))
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return eom - som;
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else
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return 0;
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#else
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#warning Cannot get malloc info on this platform
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return 0;
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#endif
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}
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uint64_t
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Process::GetTotalMemoryUsage()
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{
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#if defined(HAVE_MALLINFO)
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struct mallinfo mi = ::mallinfo();
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return mi.uordblks + mi.hblkhd;
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#else
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#warning Cannot get total memory size on this platform
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return 0;
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#endif
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}
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void
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Process::GetTimeUsage(TimeValue& elapsed, TimeValue& user_time,
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TimeValue& sys_time)
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{
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elapsed = TimeValue::now();
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#if defined(HAVE_GETRUSAGE)
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struct rusage usage;
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::getrusage(RUSAGE_SELF, &usage);
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user_time.seconds( usage.ru_utime.tv_sec );
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user_time.microseconds( usage.ru_utime.tv_usec );
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sys_time.seconds( usage.ru_stime.tv_sec );
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sys_time.microseconds( usage.ru_stime.tv_usec );
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#else
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#warning Cannot get usage times on this platform
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user_time.seconds(0);
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user_time.microseconds(0);
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sys_time.seconds(0);
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sys_time.microseconds(0);
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#endif
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}
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}
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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