cosmotool/external/sharp/c_utils/c_utils.c

82 lines
2.5 KiB
C
Raw Normal View History

2012-11-10 14:59:10 +01:00
/*
* This file is part of libc_utils.
*
* libc_utils is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* libc_utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libc_utils; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* libc_utils is being developed at the Max-Planck-Institut fuer Astrophysik
* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
* (DLR).
*/
/*
* Convenience functions
*
* Copyright (C) 2008, 2009, 2010, 2011, 2012 Max-Planck-Society
* Author: Martin Reinecke
*/
#include <stdio.h>
#include "c_utils.h"
void util_fail_ (const char *file, int line, const char *func, const char *msg)
{
fprintf(stderr,"%s, %i (%s):\n%s\n",file,line,func,msg);
exit(1);
}
void util_warn_ (const char *file, int line, const char *func, const char *msg)
{
fprintf(stderr,"%s, %i (%s):\n%s\n",file,line,func,msg);
}
/* This function tries to avoid allocations with a total size close to a high
power of two (called the "critical stride" here), by adding a few more bytes
if necssary. This lowers the probability that two arrays differ by a multiple
of the critical stride in their starting address, which in turn lowers the
risk of cache line contention. */
static size_t manipsize(size_t sz)
{
const size_t critical_stride=4096, cacheline=64, overhead=32;
if (sz < (critical_stride/2)) return sz;
if (((sz+overhead)%critical_stride)>(2*cacheline)) return sz;
return sz+2*cacheline;
}
#ifdef __SSE__
#include <xmmintrin.h>
void *util_malloc_ (size_t sz)
{
void *res;
if (sz==0) return NULL;
res = _mm_malloc(manipsize(sz),16);
UTIL_ASSERT(res,"_mm_malloc() failed");
return res;
}
void util_free_ (void *ptr)
{ if ((ptr)!=NULL) _mm_free(ptr); }
#else
void *util_malloc_ (size_t sz)
{
void *res;
if (sz==0) return NULL;
res = malloc(manipsize(sz));
UTIL_ASSERT(res,"malloc() failed");
return res;
}
void util_free_ (void *ptr)
{ if ((ptr)!=NULL) free(ptr); }
#endif