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