/* sl_malloc.c - malloc routines using a per-thread slab */
/* $OpenLDAP$ */
-/*
- * Copyright 2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2004 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
void *h_end;
};
-static void
-sl_mem_destroy(
+void
+slap_sl_mem_destroy(
void *key,
void *data
)
{
struct slab_heap *sh = data;
- ch_free(sh->h_base);
- ch_free(sh);
+ ber_memfree_x(sh->h_base, NULL);
+ ber_memfree_x(sh, NULL);
}
-BER_MEMALLOC_FN sl_malloc;
-BER_MEMCALLOC_FN sl_calloc;
-BER_MEMREALLOC_FN sl_realloc;
-BER_MEMFREE_FN sl_free;
-
-static BerMemoryFunctions sl_bmf =
- { sl_malloc, sl_calloc, sl_realloc, sl_free };
+BerMemoryFunctions slap_sl_mfuncs =
+ { slap_sl_malloc, slap_sl_calloc, slap_sl_realloc, slap_sl_free };
void
-sl_mem_init()
+slap_sl_mem_init()
{
- ber_set_option( NULL, LBER_OPT_MEMORY_FNS, &sl_bmf );
+ ber_set_option( NULL, LBER_OPT_MEMORY_FNS, &slap_sl_mfuncs );
}
+#ifdef NO_THREADS
+static struct slab_heap *slheap;
+#endif
+
void *
-sl_mem_create(
+slap_sl_mem_create(
ber_len_t size,
void *ctx
)
struct slab_heap *sh = NULL;
int pad = 2*sizeof(int)-1;
- ldap_pvt_thread_pool_getkey( ctx, sl_mem_init, (void **)&sh, NULL );
+#ifdef NO_THREADS
+ sh = slheap;
+#else
+ ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sl_mem_init, (void **)&sh, NULL );
+#endif
/* round up to doubleword boundary */
size += pad;
if (!sh) {
sh = ch_malloc( sizeof(struct slab_heap) );
sh->h_base = ch_malloc( size );
- ldap_pvt_thread_pool_setkey( ctx, sl_mem_init, (void *)sh, sl_mem_destroy );
- } else if ( size > sh->h_end - sh->h_base ) {
+#ifdef NO_THREADS
+ slheap = sh;
+#else
+ ldap_pvt_thread_pool_setkey( ctx, (void *)slap_sl_mem_init,
+ (void *)sh, slap_sl_mem_destroy );
+#endif
+ } else if ( size > (char *) sh->h_end - (char *) sh->h_base ) {
sh->h_base = ch_realloc( sh->h_base, size );
}
sh->h_last = sh->h_base;
- sh->h_end = sh->h_base + size;
+ sh->h_end = (char *) sh->h_base + size;
return sh;
}
+void
+slap_sl_mem_detach(
+ void *ctx,
+ void *memctx
+)
+{
+#ifdef NO_THREADS
+ slheap = NULL;
+#else
+ /* separate from context */
+ ldap_pvt_thread_pool_setkey( ctx, (void *)slap_sl_mem_init, NULL, NULL );
+#endif
+}
+
void *
-sl_malloc(
+slap_sl_malloc(
ber_len_t size,
void *ctx
)
size += pad + sizeof( ber_len_t );
size &= ~pad;
- if (sh->h_last + size >= sh->h_end ) {
+ if ((char *) sh->h_last + size >= (char *) sh->h_end ) {
#ifdef NEW_LOGGING
- LDAP_LOG( OPERATION, ERR,
- "sl_malloc: allocation of %lu bytes failed\n", (long)size, 0,0 );
+ LDAP_LOG( OPERATION, INFO,
+ "slap_sl_malloc of %lu bytes failed, using ch_malloc\n",
+ (long)size, 0,0 );
#else
- Debug( LDAP_DEBUG_ANY, "sl_malloc of %lu bytes failed\n",
- (long) size, 0, 0 );
+ Debug( LDAP_DEBUG_TRACE,
+ "slap_sl_malloc of %lu bytes failed, using ch_malloc\n",
+ (long)size, 0,0 );
#endif
- assert( 0 );
- exit( EXIT_FAILURE );
+ return ch_malloc( size );
}
new = sh->h_last;
*new++ = size - sizeof(ber_len_t);
- sh->h_last += size;
+ sh->h_last = (char *) sh->h_last + size;
return( (void *)new );
}
void *
-sl_calloc( ber_len_t n, ber_len_t size, void *ctx )
+slap_sl_calloc( ber_len_t n, ber_len_t size, void *ctx )
{
void *new;
- new = sl_malloc( n*size, ctx );
+ new = slap_sl_malloc( n*size, ctx );
if ( new ) {
memset( new, 0, n*size );
}
}
void *
-sl_realloc( void *ptr, ber_len_t size, void *ctx )
+slap_sl_realloc( void *ptr, ber_len_t size, void *ctx )
{
struct slab_heap *sh = ctx;
int pad = 2*sizeof(int)-1;
ber_len_t *p = (ber_len_t *)ptr;
ber_len_t *new;
- if ( ptr == NULL ) return sl_malloc( size, ctx );
+ if ( ptr == NULL ) return slap_sl_malloc( size, ctx );
- if ( ptr < sh->h_base || ptr >= sh->h_end ) {
+ /* Not our memory? */
+ if ( !sh || ptr < sh->h_base || ptr >= sh->h_end ) {
+ /* duplicate of ch_realloc behavior, oh well */
+ new = ber_memrealloc_x( ptr, size, NULL );
+ if (new ) {
+ return new;
+ }
#ifdef NEW_LOGGING
LDAP_LOG( OPERATION, ERR,
- "sl_free: not mine: 0x%lx\n", (long)ptr, 0,0 );
+ "ch_realloc: reallocation of %lu bytes failed\n", (long)size, 0,0 );
#else
- Debug( LDAP_DEBUG_ANY,
- "sl_free: not mine: 0x%lx\n", (long)ptr, 0,0 );
+ Debug( LDAP_DEBUG_ANY, "ch_realloc of %lu bytes failed\n",
+ (long) size, 0, 0 );
#endif
assert( 0 );
exit( EXIT_FAILURE );
}
- if ( size == 0 ) return NULL;
+ if ( size == 0 ) {
+ slap_sl_free( ptr, ctx );
+ return NULL;
+ }
/* round up to doubleword boundary */
size += pad + sizeof( ber_len_t );
size &= ~pad;
- /* We always alloc a new block */
+ /* Never shrink blocks */
if (size <= p[-1]) {
- p[-1] = size;
new = p;
+
+ /* If reallocing the last block, we can grow it */
+ } else if ( (char *)ptr + p[-1] == sh->h_last ) {
+ new = p;
+ sh->h_last = (char *) sh->h_last + size - p[-1];
+ p[-1] = size;
+
+ /* Nowhere to grow, need to alloc and copy */
} else {
- new = sl_malloc( size, ctx );
+ new = slap_sl_malloc( size, ctx );
AC_MEMCPY( new, ptr, p[-1] );
}
return new;
}
void
-sl_free( void *ptr, void *ctx )
+slap_sl_free( void *ptr, void *ctx )
{
struct slab_heap *sh = ctx;
+ ber_len_t *p = (ber_len_t *)ptr;
- if ( ptr < sh->h_base || ptr >= sh->h_end ) {
-#ifdef NEW_LOGGING
- LDAP_LOG( OPERATION, ERR,
- "sl_free: not mine: 0x%lx\n", (long)ptr, 0,0 );
+ if ( !sh || ptr < sh->h_base || ptr >= sh->h_end ) {
+ ber_memfree_x( ptr, NULL );
+ } else if ( (char *)ptr + p[-1] == sh->h_last ) {
+ p--;
+ sh->h_last = p;
+ }
+}
+
+void *
+slap_sl_context( void *ptr )
+{
+ struct slab_heap *sh = NULL;
+ void *ctx;
+
+#ifdef NO_THREADS
+ sh = slheap;
#else
- Debug( LDAP_DEBUG_ANY,
- "sl_free: not mine: 0x%lx\n", (long)ptr, 0,0 );
+ ctx = ldap_pvt_thread_pool_context();
+
+ ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sl_mem_init, (void **)&sh, NULL );
#endif
- assert( 0 );
- exit( EXIT_FAILURE );
+
+ if ( sh && ptr >= sh->h_base && ptr <= sh->h_end ) {
+ return sh;
}
+ return NULL;
}
projects / openldap / blobdiff