diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-19 19:07:42 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-05-27 12:21:43 -0300 |
| commit | 86c19525b7e953217e5ad2b5496029b1ac6fe26b (patch) | |
| tree | 8c962146fd6350a0b1073318e8b5eef8601521da /tools/perf/util/comm.c | |
| parent | e7e0efcdb807a570b11f240e2608d7aed5ccdfb1 (diff) | |
| download | linux-86c19525b7e953217e5ad2b5496029b1ac6fe26b.tar.bz2 | |
perf comm: Use atomic.h for refcounting
Now that we have atomic.h, we should convert all of the existing
refcounts to use it.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-quzeuy3jwsyod6e06o39cl6y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/comm.c')
| -rw-r--r-- | tools/perf/util/comm.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/tools/perf/util/comm.c b/tools/perf/util/comm.c index b2bb59df65e1..21b7ff382c3f 100644 --- a/tools/perf/util/comm.c +++ b/tools/perf/util/comm.c @@ -2,24 +2,27 @@ #include "util.h" #include <stdlib.h> #include <stdio.h> +#include <linux/atomic.h> struct comm_str { char *str; struct rb_node rb_node; - int ref; + atomic_t refcnt; }; /* Should perhaps be moved to struct machine */ static struct rb_root comm_str_root; -static void comm_str__get(struct comm_str *cs) +static struct comm_str *comm_str__get(struct comm_str *cs) { - cs->ref++; + if (cs) + atomic_inc(&cs->refcnt); + return cs; } static void comm_str__put(struct comm_str *cs) { - if (!--cs->ref) { + if (cs && atomic_dec_and_test(&cs->refcnt)) { rb_erase(&cs->rb_node, &comm_str_root); zfree(&cs->str); free(cs); @@ -40,6 +43,8 @@ static struct comm_str *comm_str__alloc(const char *str) return NULL; } + atomic_set(&cs->refcnt, 0); + return cs; } |