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authorStephen Gallagher <sgallagh@redhat.com>2010-02-18 07:49:04 -0500
committerStephen Gallagher <sgallagh@redhat.com>2010-02-18 13:48:45 -0500
commit1c48b5a62f73234ed26bb20f0ab345ab61cda0ab (patch)
tree0b6cddd567a862e1a7b5df23764869782a62ca78 /src/util/refcount.c
parent8c56df3176f528fe0260974b3bf934173c4651ea (diff)
downloadsssd-1c48b5a62f73234ed26bb20f0ab345ab61cda0ab.tar.gz
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Rename server/ directory to src/
Also update BUILD.txt
Diffstat (limited to 'src/util/refcount.c')
-rw-r--r--src/util/refcount.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/src/util/refcount.c b/src/util/refcount.c
new file mode 100644
index 000000000..735170d1b
--- /dev/null
+++ b/src/util/refcount.c
@@ -0,0 +1,88 @@
+/*
+ SSSD
+
+ Simple reference counting wrappers for talloc.
+
+ Authors:
+ Martin Nagy <mnagy@redhat.com>
+
+ Copyright (C) Red Hat, Inc 2009
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <talloc.h>
+
+#include "refcount.h"
+#include "util/util.h"
+
+struct wrapper {
+ int *refcount;
+ void *ptr;
+};
+
+static int
+refcount_destructor(struct wrapper *wrapper)
+{
+ (*wrapper->refcount)--;
+ if (*wrapper->refcount == 0) {
+ talloc_free(wrapper->ptr);
+ };
+
+ return 0;
+}
+
+void *
+_rc_alloc(const void *context, size_t size, size_t refcount_offset,
+ const char *type_name)
+{
+ struct wrapper *wrapper;
+
+ wrapper = talloc(context, struct wrapper);
+ if (wrapper == NULL) {
+ return NULL;
+ }
+
+ wrapper->ptr = talloc_named_const(NULL, size, type_name);
+ if (wrapper->ptr == NULL) {
+ talloc_free(wrapper);
+ return NULL;
+ };
+
+ wrapper->refcount = (int *)((char *)wrapper->ptr + refcount_offset);
+ *wrapper->refcount = 1;
+
+ talloc_set_destructor(wrapper, refcount_destructor);
+
+ return wrapper->ptr;
+}
+
+void *
+_rc_reference(const void *context, size_t refcount_offset, void *source)
+{
+ struct wrapper *wrapper;
+
+ wrapper = talloc(context, struct wrapper);
+ if (wrapper == NULL) {
+ return NULL;
+ }
+
+ wrapper->ptr = source;
+ wrapper->refcount = (int *)((char *)wrapper->ptr + refcount_offset);
+ (*wrapper->refcount)++;
+
+ talloc_set_destructor(wrapper, refcount_destructor);
+
+ return wrapper->ptr;
+}