implemented talloc() as described on samba-technical. This fixes the

lp_string() bug properly.

we still need to add lp_talloc_free() calls in all the main event
loops, I've only put it in smbd and nmbd thus far.

1 files changed, 96 insertions, 0 deletions

diff --git a/source/lib/talloc.c b/source/lib/talloc.c
new file mode 100644
index 00000000000..518237cde8f
--- /dev/null
+++ b/source/lib/talloc.c
@@ -0,0 +1,96 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   Samba temporary memory allocation functions
+   Copyright (C) Andrew Tridgell 2000
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/* this is a very simple temporary memory allocator. To use it do the following:
+
+   1) when you first want to allocate a pool of meomry use
+   talloc_init() and save the resulting context pointer somewhere
+
+   2) to allocate memory use talloc()
+
+   3) when _all_ of the memory allocated using this context is no longer needed
+   use talloc_destroy()
+
+   talloc does not zero the memory. It guarantees memory of a
+   TALLOC_ALIGN alignment
+*/
+
+#include "includes.h"
+
+#define TALLOC_ALIGN 32
+#define TALLOC_CHUNK_SIZE (0x2000)
+
+/* initialissa talloc context. */
+TALLOC_CTX *talloc_init(void)
+{
+	TALLOC_CTX *t;
+
+	t = (TALLOC_CTX *)malloc(sizeof(*t));
+	if (!t) return NULL;
+
+	t->list = NULL;
+
+	return t;
+}
+
+/* allocate a bit of memory from the specified pool */
+void *talloc(TALLOC_CTX *t, size_t size)
+{
+	void *p;
+
+	size = (size + TALLOC_ALIGN) & (~TALLOC_ALIGN-1);
+
+	if (!t->list || (t->list->total_size - t->list->alloc_size) < size) {
+		struct talloc_chunk *c;
+		size_t asize = (size + TALLOC_CHUNK_SIZE) & ~(TALLOC_CHUNK_SIZE-1);
+
+		c = (struct talloc_chunk *)malloc(sizeof(*c));
+		if (!c) return NULL;
+		c->next = t->list;
+		c->ptr = (void *)malloc(asize);
+		if (!c->ptr) {
+			free(c);
+			return NULL;
+		}
+		c->alloc_size = 0;
+		c->total_size = asize;
+		t->list = c;
+	}
+
+	p = t->list->ptr + t->list->alloc_size;
+	t->list->alloc_size += size;
+	return p;
+}
+
+/* destroy a whole pool */
+void talloc_destroy(TALLOC_CTX *t)
+{
+	struct talloc_chunk *c;
+	
+	while (t->list) {
+		c = t->list->next;
+		free(t->list->ptr);
+		free(t->list);
+		t->list = c;
+	}
+
+	free(t);
+}