Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
-#if HAVE_CONFIG_H
#include <config.h>
-#endif
#include "pool.h"
-#include <assert.h>
+#include "command.h"
+#include "error.h"
#include <stdlib.h>
#include "alloc.h"
#include "str.h"
This structure is used to keep track of them. */
struct pool_gizmo
{
+ struct pool *pool;
struct pool_gizmo *prev;
struct pool_gizmo *next;
simplified functionality. */
/*#define DISCRETE_BLOCKS 1*/
-/* Enable debug code if appropriate. */
-#if SELF_TEST
-#endif
-
/* Size of each block allocated in the pool, in bytes.
Should be at least 1k. */
#ifndef BLOCK_SIZE
static void free_gizmo (struct pool_gizmo *);
static void free_all_gizmos (struct pool *pool);
static void delete_gizmo (struct pool *, struct pool_gizmo *);
-
-#if !PSPP
-static void *xmalloc (size_t);
-static void *xrealloc (void *, size_t);
-#endif
+static void check_gizmo (struct pool *, struct pool_gizmo *);
\f
/* General routines. */
/* Remove this pool from its parent's list of gizmos. */
if (pool->parent)
- delete_gizmo (pool->parent,
- (void *) (((char *) pool) + POOL_SIZE + POOL_BLOCK_SIZE));
-
+ delete_gizmo (pool->parent, (void *) (((char *) pool) + POOL_SIZE));
+
free_all_gizmos (pool);
/* Free all the memory. */
do
{
cur->ofs = POOL_BLOCK_SIZE;
- if ((char *) cur + POOL_BLOCK_SIZE == (char *) pool)
- cur->ofs += POOL_SIZE;
+ if ((char *) cur + POOL_BLOCK_SIZE == (char *) pool)
+ {
+ cur->ofs += POOL_SIZE;
+ if (pool->parent != NULL)
+ cur->ofs += POOL_GIZMO_SIZE;
+ }
cur = cur->next;
}
while (cur != pool->blocks);
return pool_malloc (pool, amt);
}
+/* Allocates SIZE bytes in POOL, copies BUFFER into it, and
+ returns the new copy. */
+void *
+pool_clone (struct pool *pool, const void *buffer, size_t size)
+{
+ void *block = pool_alloc (pool, size);
+ memcpy (block, buffer, size);
+ return block;
+}
+
/* Duplicates STRING, which has LENGTH characters, within POOL,
and returns a pointer to the duplicate. LENGTH should not
include the null terminator, which is always added to the
copy = ((char *) b) + b->ofs;
b->ofs += size;
}
+ else
+ copy = pool_alloc (pool, size);
}
#else
copy = pool_alloc (pool, size);
{
if (amt != 0)
{
- struct pool_gizmo *g;
+ struct pool_gizmo *g = (void *) (((char *) p) - POOL_GIZMO_SIZE);
+ check_gizmo (pool, g);
- g = xrealloc (((char *) p) - POOL_GIZMO_SIZE,
- amt + POOL_GIZMO_SIZE);
+ g = xrealloc (g, amt + POOL_GIZMO_SIZE);
if (g->next)
g->next->prev = g;
if (g->prev)
g->prev->next = g;
else
pool->gizmos = g;
+ check_gizmo (pool, g);
return ((char *) g) + POOL_GIZMO_SIZE;
}
if (pool != NULL && p != NULL)
{
struct pool_gizmo *g = (void *) (((char *) p) - POOL_GIZMO_SIZE);
+ check_gizmo (pool, g);
delete_gizmo (pool, g);
free (g);
}
subpool = pool_create ();
subpool->parent = pool;
- g = (void *) (((char *) subpool) + subpool->blocks->ofs);
+ g = (void *) (((char *) subpool->blocks) + subpool->blocks->ofs);
subpool->blocks->ofs += POOL_GIZMO_SIZE;
g->type = POOL_GIZMO_SUBPOOL;
for (cur = pool->blocks; cur != mark->block; cur = cur->next)
{
cur->ofs = POOL_BLOCK_SIZE;
- if ((char *) cur + POOL_BLOCK_SIZE == (char *) pool)
- cur->ofs += POOL_SIZE;
+ if ((char *) cur + POOL_BLOCK_SIZE == (char *) pool)
+ {
+ cur->ofs += POOL_SIZE;
+ if (pool->parent != NULL)
+ cur->ofs += POOL_GIZMO_SIZE;
+ }
}
pool->blocks = mark->block;
pool->blocks->ofs = mark->ofs;
add_gizmo (struct pool *pool, struct pool_gizmo *gizmo)
{
assert (pool && gizmo);
-
+
+ gizmo->pool = pool;
gizmo->next = pool->gizmos;
gizmo->prev = NULL;
if (pool->gizmos)
pool->gizmos = gizmo;
gizmo->serial = serial++;
+
+ check_gizmo (pool, gizmo);
}
/* Removes GIZMO from POOL's gizmo list. */
delete_gizmo (struct pool *pool, struct pool_gizmo *gizmo)
{
assert (pool && gizmo);
-
+
+ check_gizmo (pool, gizmo);
+
if (gizmo->prev)
gizmo->prev->next = gizmo->next;
else
free_gizmo (struct pool_gizmo *gizmo)
{
assert (gizmo != NULL);
-
+
switch (gizmo->type)
{
case POOL_GIZMO_MALLOC:
next = cur->next;
free_gizmo (cur);
}
+ pool->gizmos = NULL;
}
-\f
-/* Memory allocation. */
-#if !PSPP
-/* Allocates SIZE bytes of space using malloc(). Aborts if out of
- memory. */
-static void *
-xmalloc (size_t size)
+static void
+check_gizmo (struct pool *p, struct pool_gizmo *g)
{
- void *vp;
- if (size == 0)
- return NULL;
- vp = malloc (size);
- assert (vp != NULL);
- if (vp == NULL)
- abort ();
- return vp;
-}
+ assert (g->pool == p);
+ assert (g->next == NULL || g->next->prev == g);
+ assert ((g->prev != NULL && g->prev->next == g)
+ || (g->prev == NULL && p->gizmos == g));
-/* Reallocates P to be SIZE bytes long using realloc(). Aborts if out
- of memory. */
-static void *
-xrealloc (void *p, size_t size)
-{
- if (p == NULL)
- return xmalloc (size);
- if (size == 0)
- {
- free (p);
- return NULL;
- }
- p = realloc (p, size);
- if (p == NULL)
- abort ();
- return p;
}
-#endif /* !PSPP */
\f
/* Self-test routine. */
-#if SELF_TEST
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
/* Self-test routine.
This is not exhaustive, but it can be useful. */
int
-main (int argc, char **argv)
+cmd_debug_pool (void)
{
- int seed;
-
- if (argc == 2)
- seed = atoi (argv[1]);
- else
- seed = time (0) * 257 % 32768;
+ int seed = time (0) * 257 % 32768;
for (;;)
{
putchar ('\n');
}
-}
-#endif /* SELF_TEST */
+ return CMD_SUCCESS;
+}
-/*
- Local variables:
- compile-command: "gcc -DSELF_TEST=1 -W -Wall -I. -o pool_test pool.c"
- End:
-*/