diff options
Diffstat (limited to 'libglusterfs/src/client_t.h')
| -rw-r--r-- | libglusterfs/src/client_t.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libglusterfs/src/client_t.h b/libglusterfs/src/client_t.h index 2accf0c6fc2..f6d161e930d 100644 --- a/libglusterfs/src/client_t.h +++ b/libglusterfs/src/client_t.h @@ -78,6 +78,23 @@ typedef struct clienttable clienttable_t; struct rpcsvc_auth_data; +/* + * a more comprehensive feature test is shown at + * http://lists.iptel.org/pipermail/semsdev/2010-October/005075.html + * this is sufficient for RHEL5 i386 builds + */ +#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) && !defined(__i386__) +# define INCREMENT_ATOMIC(lk, op) __sync_add_and_fetch(&op, 1) +# define DECREMENT_ATOMIC(lk, op) __sync_sub_and_fetch(&op, 1) +#else +/* These are only here for old gcc, e.g. on RHEL5 i386. + * We're not ever going to use this in an if stmt, + * but let's be pedantically correct for style points */ +# define INCREMENT_ATOMIC(lk, op) do { LOCK (&lk); ++op; UNLOCK (&lk); } while (0) +/* this is a gcc 'statement expression', it works with llvm/clang too */ +# define DECREMENT_ATOMIC(lk, op) ({ LOCK (&lk); --op; UNLOCK (&lk); op; }) +#endif + client_t * gf_client_get (xlator_t *this, struct rpcsvc_auth_data *cred, char *client_uid); |