move refcount to header

core/meson.build

@@ -6,7 +6,6 @@ kernel_sources += files(
     'panic.c',
     'percpu.c',
     'print.c',
-    'refcount.c',
     'spin.c',
     'wait.c',
 )

core/refcount.c

@@ -1,17 +0,0 @@
-#include <zinnia/refcount.h>
-#include <stdatomic.h>
-
-void refcount_init(struct refcount* rc) {
-    atomic_store_explicit(&rc->count, 1, memory_order_relaxed);
-}
-
-void refcount_inc(struct refcount* rc) {
-    atomic_fetch_add_explicit(&rc->count, 1, memory_order_relaxed);
-}
-
-bool refcount_dec(struct refcount* rc) {
-    if (atomic_fetch_sub_explicit(&rc->count, 1, memory_order_release) != 1)
-        return false;
-    atomic_thread_fence(memory_order_acquire);
-    return true;
-}

include/zinnia/refcount.h

@@ -8,6 +8,17 @@ struct refcount {
     _Atomic(size_t) count;
 };
 
-void refcount_init(struct refcount* rc);
+static inline void refcount_init(struct refcount* rc) {
-void refcount_inc(struct refcount* rc);
+    atomic_store_explicit(&rc->count, 1, memory_order_relaxed);
-bool refcount_dec(struct refcount* rc);
+}
+
+static inline void refcount_inc(struct refcount* rc) {
+    atomic_fetch_add_explicit(&rc->count, 1, memory_order_relaxed);
+}
+
+static inline bool refcount_dec(struct refcount* rc) {
+    if (atomic_fetch_sub_explicit(&rc->count, 1, memory_order_release) != 1)
+        return false;
+    atomic_thread_fence(memory_order_acquire);
+    return true;
+}