diff options
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; } |