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Commit 86c19525 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e7e0efcd

tools/perf/util/comm.c

+9 −4
Original line number Diff line number Diff line
@@ -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;

}