#include <stdio.h>
#include <string.h>
#include <linux/refcount.h>
+#include "rwsem.h"
struct comm_str {
char *str;
/* Should perhaps be moved to struct machine */
static struct rb_root comm_str_root;
+static struct rw_semaphore comm_str_lock = {.lock = PTHREAD_RWLOCK_INITIALIZER,};
static struct comm_str *comm_str__get(struct comm_str *cs)
{
static void comm_str__put(struct comm_str *cs)
{
if (cs && refcount_dec_and_test(&cs->refcnt)) {
+ down_write(&comm_str_lock);
rb_erase(&cs->rb_node, &comm_str_root);
+ up_write(&comm_str_lock);
zfree(&cs->str);
free(cs);
}
return cs;
}
-static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root)
+static
+struct comm_str *__comm_str__findnew(const char *str, struct rb_root *root)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
return new;
}
+static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root)
+{
+ struct comm_str *cs;
+
+ down_write(&comm_str_lock);
+ cs = __comm_str__findnew(str, root);
+ up_write(&comm_str_lock);
+
+ return cs;
+}
+
struct comm *comm__new(const char *str, u64 timestamp, bool exec)
{
struct comm *comm = zalloc(sizeof(*comm));