82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
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/*
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* This file is part of libc_utils.
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*
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* libc_utils 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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* libc_utils 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 libc_utils; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* libc_utils is being developed at the Max-Planck-Institut fuer Astrophysik
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* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
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* (DLR).
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*/
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/*
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* Convenience functions
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*
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* Copyright (C) 2008, 2009, 2010, 2011, 2012 Max-Planck-Society
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* Author: Martin Reinecke
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*/
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#include <stdio.h>
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#include "c_utils.h"
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void util_fail_ (const char *file, int line, const char *func, const char *msg)
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{
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fprintf(stderr,"%s, %i (%s):\n%s\n",file,line,func,msg);
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exit(1);
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}
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void util_warn_ (const char *file, int line, const char *func, const char *msg)
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{
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fprintf(stderr,"%s, %i (%s):\n%s\n",file,line,func,msg);
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}
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/* This function tries to avoid allocations with a total size close to a high
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power of two (called the "critical stride" here), by adding a few more bytes
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if necssary. This lowers the probability that two arrays differ by a multiple
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of the critical stride in their starting address, which in turn lowers the
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risk of cache line contention. */
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static size_t manipsize(size_t sz)
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{
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const size_t critical_stride=4096, cacheline=64, overhead=32;
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if (sz < (critical_stride/2)) return sz;
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if (((sz+overhead)%critical_stride)>(2*cacheline)) return sz;
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return sz+2*cacheline;
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}
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#ifdef __SSE__
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#include <xmmintrin.h>
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void *util_malloc_ (size_t sz)
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{
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void *res;
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if (sz==0) return NULL;
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res = _mm_malloc(manipsize(sz),16);
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UTIL_ASSERT(res,"_mm_malloc() failed");
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return res;
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}
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void util_free_ (void *ptr)
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{ if ((ptr)!=NULL) _mm_free(ptr); }
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#else
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void *util_malloc_ (size_t sz)
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{
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void *res;
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if (sz==0) return NULL;
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res = malloc(manipsize(sz));
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UTIL_ASSERT(res,"malloc() failed");
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return res;
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}
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void util_free_ (void *ptr)
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{ if ((ptr)!=NULL) free(ptr); }
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#endif
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