[apparmor] [PATCH 04/12] libapparmor: Temporarily duplicate the parser's atomic ops

[Tyler Hicks]

The parser's copy of the two atomic operations will be removed once the
new API's (aa_match, aa_features, aa_policy_cache, aa_kernel_interface)
are moved from the parser to libapparmor.

Signed-off-by: Tyler Hicks <tyhicks at canonical.com>
---
 libraries/libapparmor/src/private.c | 10 ++++++++++
 libraries/libapparmor/src/private.h |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/libraries/libapparmor/src/private.c b/libraries/libapparmor/src/private.c
index 1143a34..255585f 100644
--- a/libraries/libapparmor/src/private.c
+++ b/libraries/libapparmor/src/private.c
@@ -52,6 +52,16 @@ static struct ignored_suffix_t ignored_suffixes[] = {
 	{ NULL, 0, 0 }
 };
 
+void atomic_inc(unsigned int *v)
+{
+	__sync_add_and_fetch(v, 1);
+}
+
+bool atomic_dec_and_test(unsigned int *v)
+{
+	return __sync_sub_and_fetch(v, 1) == 0;
+}
+
 int _aa_is_blacklisted(const char *name, const char *path)
 {
 	int name_len;
diff --git a/libraries/libapparmor/src/private.h b/libraries/libapparmor/src/private.h
index 3007294..2ef3088 100644
--- a/libraries/libapparmor/src/private.h
+++ b/libraries/libapparmor/src/private.h
@@ -17,10 +17,14 @@
 #ifndef _AA_PRIVATE_H
 #define _AA_PRIVATE_H 1
 
+#include <stdbool.h>
 #include <sys/apparmor_private.h>
 
 #define autofree __attribute((cleanup(_aa_autofree)))
 #define autoclose __attribute((cleanup(_aa_autoclose)))
 #define autofclose __attribute((cleanup(_aa_autofclose)))
 
+void atomic_inc(unsigned int *v);
+bool atomic_dec_and_test(unsigned int *v);
+
 #endif /* _AA_PRIVATE_H */
-- 
2.1.0