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Unverified Commit e16ad728 by Christian Brauner
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memory_utils: add call_cleaner() helper

This allows to trivially declare cleanup attributes on the fly. Signed-off-by: 's avatarChristian Brauner <christian.brauner@ubuntu.com>
parent 2b1ec4b9
Showing with 10 additions and 7 deletions
src/lxc/memory_utils.h
...@@ -12,13 +12,15 @@ ...@@ -12,13 +12,15 @@
#include "macro.h" #include "macro.h"
#define define_cleanup_attribute(type, func) \ #define define_cleanup_function(type, cleaner) \
static inline void func##_ptr(type *ptr) \ static inline void cleaner##_function(type *ptr) \
{ \ { \
if (*ptr) \ if (*ptr) \
func(*ptr); \ cleaner(*ptr); \
} }
#define call_cleaner(cleaner) __attribute__((__cleanup__(cleaner##_function)))
#define free_disarm(ptr) \ #define free_disarm(ptr) \
({ \ ({ \
free(ptr); \ free(ptr); \
...@@ -38,8 +40,9 @@ static inline void free_string_list(char **list) ...@@ -38,8 +40,9 @@ static inline void free_string_list(char **list)
free_disarm(list); free_disarm(list);
} }
} }
define_cleanup_attribute(char **, free_string_list); define_cleanup_function(char **, free_string_list);
#define __do_free_string_list __attribute__((__cleanup__(free_string_list_ptr))) #define __do_free_string_list \
__attribute__((__cleanup__(free_string_list_function)))
static inline void __auto_fclose__(FILE **f) static inline void __auto_fclose__(FILE **f)
{ {
......
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