5 #ifndef __MONO_UTILS_REFCOUNT_H__
6 #define __MONO_UTILS_REFCOUNT_H__
14 * Mechanism for ref-counting which tries to be as user-friendly as possible. Instead of being a wrapper around
15 * user-provided data, it is embedded into the user data.
17 * This introduces some constraints on the MonoRefCount field:
18 * - it needs to be called "ref"
19 * - it cannot be a pointer
24 void (*destructor) (gpointer data);
27 #define mono_refcount_init(v,destructor) do { mono_refcount_initialize (&(v)->ref, (destructor)); } while (0)
28 #define mono_refcount_inc(v) (mono_refcount_increment (&(v)->ref),(v))
29 #define mono_refcount_tryinc(v) (mono_refcount_tryincrement (&(v)->ref))
30 #define mono_refcount_dec(v) do { mono_refcount_decrement (&(v)->ref); } while (0)
33 mono_refcount_initialize (MonoRefCount *refcount, void (*destructor) (gpointer data))
36 refcount->destructor = destructor;
39 static inline gboolean
40 mono_refcount_tryincrement (MonoRefCount *refcount)
42 guint32 oldref, newref;
47 oldref = refcount->ref;
52 } while (InterlockedCompareExchange ((gint32*) &refcount->ref, newref, oldref) != oldref);
58 mono_refcount_increment (MonoRefCount *refcount)
60 if (!mono_refcount_tryincrement (refcount))
61 g_error ("%s: cannot increment a ref with value 0", __func__);
65 mono_refcount_decrement (MonoRefCount *refcount)
67 guint32 oldref, newref;
72 oldref = refcount->ref;
74 g_error ("%s: cannot decrement a ref with value 0", __func__);
77 } while (InterlockedCompareExchange ((gint32*) &refcount->ref, newref, oldref) != oldref);
79 if (newref == 0 && refcount->destructor)
80 refcount->destructor ((gpointer) refcount);
83 #endif /* __MONO_UTILS_REFCOUNT_H__ */