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/* ========================================================================== */
/* === UMF_malloc =========================================================== */
/* ========================================================================== */
/* -------------------------------------------------------------------------- */
/* UMFPACK Copyright (c) Timothy A. Davis, CISE, */
/* Univ. of Florida. All Rights Reserved. See ../Doc/License for License. */
/* web: http://www.cise.ufl.edu/research/sparse/umfpack */
/* -------------------------------------------------------------------------- */
/*
Allocate a block of n objects, each of a given size. This routine does not
handle the case when the size is 1 (allocating char's) because of potential
integer overflow. UMFPACK never does that.
Also maintains the UMFPACK malloc count.
*/
#include "umf_internal.h"
#if defined (UMF_MALLOC_COUNT) || !defined (NDEBUG)
/*
UMF_malloc_count is a count of the objects malloc'd by UMFPACK. If you
suspect a memory leak in your program (caused by not properly destroying
the Symbolic and Numeric objects) then compile with -DUMF_MALLOC_COUNT and
check value of UMF_malloc_count. By default, UMF_MALLOC_COUNT is not
defined, and thus UMFPACK has no global variables.
*/
GLOBAL Int UMF_malloc_count = 0 ;
#endif
#ifdef UMF_TCOV_TEST
/* For exhaustive statement coverage testing only! */
GLOBAL int umf_fail, umf_fail_lo, umf_fail_hi ;
GLOBAL int umf_realloc_fail, umf_realloc_lo, umf_realloc_hi ;
#endif
GLOBAL void *UMF_malloc
(
Int n_objects,
size_t size_of_object
)
{
size_t size ;
void *p ;
#ifdef UMF_TCOV_TEST
/* For exhaustive statement coverage testing only! */
/* Pretend to fail, to test out-of-memory conditions. */
umf_fail-- ;
if (umf_fail <= umf_fail_hi && umf_fail >= umf_fail_lo)
{
DEBUG0 (("umf_malloc: Pretend to fail %d %d %d
",
umf_fail, umf_fail_hi, umf_fail_lo)) ;
return ((void *) NULL) ;
}
#endif
DEBUG0 (("UMF_malloc: ")) ;
/* make sure that we allocate something */
n_objects = MAX (1, n_objects) ;
size = (size_t) n_objects ;
ASSERT (size_of_object > 1) ;
if (size > Int_MAX / size_of_object)
{
/* object is too big for integer pointer arithmetic */
return ((void *) NULL) ;
}
size *= size_of_object ;
/* see AMD/Source/amd_global.c for the memory allocator selection */
p = amd_malloc (size) ;
DEBUG0 ((ID"
", (Int) p)) ;
#if defined (UMF_MALLOC_COUNT) || !defined (NDEBUG)
if (p)
{
/* One more object has been malloc'ed. Keep track of the count. */
/* (purely for sanity checks). */
UMF_malloc_count++ ;
DEBUG0 ((" successful, new malloc count: "ID"
", UMF_malloc_count)) ;
}
#endif
return (p) ;
}
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