barrier: initalize file descriptors with -1

Explicitly initalize descriptors using explicit assignment like
bus_error. This makes barriers follow the same conventions as
everything else and makes things a bit simpler too.

Rename barier_init to barier_create so it is obvious that it is
not about initialization.

Remove some parens, etc.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/shared/barrier.h b/src/shared/barrier.h
index 7f76ec7910..53b4439fb2 100644
--- a/src/shared/barrier.h
+++ b/src/shared/barrier.h
@@ -57,7 +57,9 @@ struct Barrier {
         int64_t barriers;
 };
 
-int barrier_init(Barrier *obj);
+#define BARRIER_NULL {-1, -1, {-1, -1}, 0}
+
+int barrier_create(Barrier *obj);
 void barrier_destroy(Barrier *b);
 
 void barrier_set_role(Barrier *b, unsigned int role);