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/*
* Memory allocation.
* Stuart Levy, slevy@ncsa.uiuc.edu
* National Center for Supercomputing Applications,
* University of Illinois 2001.
* This file is part of partiview, released under the
* Illinois Open Source License; see the file LICENSE.partiview for details.
#include <stdio.h>
#include <stdlib.h>
#ifdef WIN32
# include "winjunk.h"
#else
# include <unistd.h>
#endif
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#include "shmem.h"
#if CAVE
#include <cave_ogl.h>
static int (*shm_purge_func)( void *data, int nbytes, void *arena ) = NULL;
static void *shm_purge_data;
void *aarena;
void shminit( int nbytes ) {
aarena = CAVEUserSharedMemory( (unsigned int) nbytes );
if(aarena == NULL) {
fprintf(stderr, "Couldn't create CAVEUserSharedMemory of %dMbytes!\n",
((unsigned int)nbytes) >> 20);
exit(1);
}
amallopt(M_DEBUG, 1, aarena);
}
void shmusearena( void *a ) {
aarena = a;
}
int shm_malloc_zero;
void *shmalloc( int nbytes ) {
void *p;
if(aarena == NULL) {
fprintf(stderr, "shmalloc: Never called shminit( arenasize )!\n");
exit(1);
}
if(nbytes <= 0) {
shm_malloc_zero++;
nbytes = 1;
}
do {
p = amalloc( nbytes, aarena );
if(p != NULL)
return p;
} while (shm_purge_func != NULL
&& 0 != (*shm_purge_func)( shm_purge_data, nbytes, aarena ));
fprintf(stderr, "Couldn't shmalloc %d bytes! Pausing for debugging (pid %d)\n", nbytes, getpid());
sleep(10);
exit(1);
return NULL;
}
void *shmrealloc( void *oldp, int nbytes ) {
void *p;
if(aarena == NULL) {
fprintf(stderr, "shmrealloc: Never called shminit( arenasize )!\n");
exit(1);
}
do {
p = arealloc( oldp, nbytes, aarena );
if(p != NULL)
return p;
} while (shm_purge_func != NULL
&& 0 != (*shm_purge_func)( shm_purge_data, nbytes, aarena ));
fprintf(stderr, "Couldn't shmrealloc %d bytes! Pausing for debugging (pid %d)\n", nbytes, getpid());
sleep(10);
exit(1);
return NULL;
}
void shmfree( void *p ) {
if(aarena && p)
afree( p, aarena );
}
char *shmstrdup( char *str ) {
char *s;
if(str == NULL) return NULL;
s = shmalloc(strlen(str)+1);
if(s == NULL) return NULL;
strcpy(s,str);
return s;
}
void shmrecycler( int (*func)(void *, int, void *), void *data )
{
shm_purge_func = func;
shm_purge_data = data;
}
#else
/* non-CAVE -- ordinary single process address space? */
char *shmstrdup( CONST char *str ) {
return str ? strdup(str) : NULL;
}
#endif /*CAVEMENU*/