1 /* ========================================================================== */
2 /* === UMF_malloc =========================================================== */
3 /* ========================================================================== */
4
5 /* -------------------------------------------------------------------------- */
6 /* Copyright (c) 2005-2012 by Timothy A. Davis, http://www.suitesparse.com. */
7 /* All Rights Reserved. See ../Doc/License.txt for License. */
8 /* -------------------------------------------------------------------------- */
9
10 /*
11 Allocate a block of n objects, each of a given size. This routine does not
12 handle the case when the size is 1 (allocating char's) because of potential
13 integer overflow. UMFPACK never does that.
14 Also maintains the UMFPACK malloc count.
15 */
16
17 #include "umf_internal.h"
18 #include "umf_malloc.h"
19
20 #if defined (UMF_MALLOC_COUNT) || !defined (NDEBUG)
21
22 /*
23 UMF_malloc_count is a count of the objects malloc'd by UMFPACK. If you
24 suspect a memory leak in your program (caused by not properly destroying
25 the Symbolic and Numeric objects) then compile with -DUMF_MALLOC_COUNT and
26 check value of UMF_malloc_count. By default, UMF_MALLOC_COUNT is not
27 defined, and thus UMFPACK has no global variables.
28 */
29
30 GLOBAL Int UMF_malloc_count = 0 ;
31
32 #endif
33
34 #ifdef UMF_TCOV_TEST
35 /* For exhaustive statement coverage testing only! */
36 GLOBAL int umf_fail, umf_fail_lo, umf_fail_hi ;
37 GLOBAL int umf_realloc_fail, umf_realloc_lo, umf_realloc_hi ;
38 #endif
39
UMF_malloc(Int n_objects,size_t size_of_object)40 GLOBAL void *UMF_malloc
41 (
42 Int n_objects,
43 size_t size_of_object
44 )
45 {
46 size_t size ;
47 void *p ;
48
49 #ifdef UMF_TCOV_TEST
50 /* For exhaustive statement coverage testing only! */
51 /* Pretend to fail, to test out-of-memory conditions. */
52 umf_fail-- ;
53 if (umf_fail <= umf_fail_hi && umf_fail >= umf_fail_lo)
54 {
55 DEBUG0 (("umf_malloc: Pretend to fail %d %d %d\n",
56 umf_fail, umf_fail_hi, umf_fail_lo)) ;
57 return ((void *) NULL) ;
58 }
59 #endif
60
61 DEBUG0 (("UMF_malloc: ")) ;
62
63 p = SuiteSparse_malloc (n_objects, size_of_object) ;
64
65 DEBUG0 ((ID"\n", (Int) p)) ;
66
67 #if defined (UMF_MALLOC_COUNT) || !defined (NDEBUG)
68 if (p)
69 {
70 /* One more object has been malloc'ed. Keep track of the count. */
71 /* (purely for sanity checks). */
72 UMF_malloc_count++ ;
73 DEBUG0 ((" successful, new malloc count: "ID"\n", UMF_malloc_count)) ;
74 }
75 #endif
76
77 return (p) ;
78 }
79