double *Zoltan_Realloc(void *ptr, int n, char *filename, int lineno)
{
char *yo = "Zoltan_Realloc";
struct malloc_debug_data *dbptr; /* loops through debug list */
int proc; /* processor ID */
double *p; /* returned pointer */
if (ptr == NULL) { /* Previous allocation not important */
if (n == 0) {
p = NULL;
}
else {
p = Zoltan_Malloc(n, filename, lineno);
}
}
else {
if (n == 0) {
Zoltan_Free((void **) &ptr, filename, lineno);
p = NULL;
}
else {
p = (double *) realloc((char *) ptr, n);
if (DEBUG_MEMORY > 1) {
/* Need to replace item in allocation list */
for (dbptr = top; dbptr != NULL && (void *) (dbptr->ptr) != ptr;
dbptr = dbptr->next);
if (dbptr == NULL) { /* previous allocation not found in list. */
GET_RANK(&proc);
fprintf(stderr, "Proc %d: Memory error: "
"In realloc, address not found in debug list (%p)\n",
proc, ptr);
}
else { /* Update entry in allocation list */
bytes_used += (n - dbptr->size);
dbptr->size = n;
dbptr->ptr = p;
if (bytes_used > bytes_max) {
bytes_max = bytes_used;
}
}
}
if (p == NULL) {
GET_RANK(&proc);
fprintf(stderr, "%s (from %s,%d) No space on proc %d - "
"number of bytes requested = %d\n",
yo, filename, lineno, proc, n);
}
}
}
return (p);
} /* Zoltan_Realloc */
double *Zoltan_Realloc(void *ptr, size_t n, char *filename, int lineno)
{
char *yo = "Zoltan_Realloc";
struct malloc_debug_data *dbptr; /* loops through debug list */
int proc; /* processor ID */
double *p; /* returned pointer */
#ifdef REALLOC_BUG
int n_old;
#endif
if (ptr == NULL) { /* Previous allocation not important */
if (n == 0) {
p = NULL;
}
else {
p = Zoltan_Malloc(n, filename, lineno);
}
}
else {
if (n == 0) {
Zoltan_Free((void **) &ptr, filename, lineno);
p = NULL;
}
else {
#ifdef REALLOC_BUG
/* Feb 10, 2010: Several platforms show a realloc bug where realloc
* either fails to allocate memory when there is sufficient memory
* or it crashes. If realloc shows this failure, then build Zoltan
* with REALLOC_BUG, and we will call malloc/memcpy/free instead.
*/
p = (double *)ptr;
p--;
n_old = p[0];
if ((n_old < 1) || (n_old > max_alloc)){ /* sanity check */
GET_RANK(&proc);
fprintf(stderr, "%s (from %s,%d) Zoltan_Realloc called on a pointer "
"that was not returned by Zoltan_Malloc (proc %d)\n",
yo, filename, lineno, proc);
return NULL;
}
p = (double *) Zoltan_Malloc(n, filename, lineno);
if (p){
if (n > n_old){
memcpy(p, ptr, n_old);
}
else if (n <= n_old){
memcpy(p, ptr, n);
}
Zoltan_Free((void **) &ptr, filename, lineno);
}
#else
p = (double *) realloc((char *) ptr, n);
if (DEBUG_MEMORY > 1) {
/* Need to replace item in allocation list */
for (dbptr = top; dbptr != NULL && (void *) (dbptr->ptr) != ptr;
dbptr = dbptr->next);
if (dbptr == NULL) { /* previous allocation not found in list. */
GET_RANK(&proc);
fprintf(stderr, "Proc %d: Memory error: "
"In realloc, address not found in debug list (0x%lx)\n",
proc, (long) ptr);
}
else { /* Update entry in allocation list */
bytes_used += (n - dbptr->size);
dbptr->size = n;
dbptr->ptr = p;
if (bytes_used > bytes_max) {
bytes_max = bytes_used;
}
}
}
if (p == NULL) {
GET_RANK(&proc);
fprintf(stderr, "%s (from %s,%d) No space on proc %d - "
"number of bytes requested = %lu\n",
yo, filename, lineno, proc, (unsigned long) n);
}
#endif
}
}
return (p);
} /* Zoltan_Realloc */
