1 (in-package :gobject.ffi)
3 (defctype g-type gsize)
5 (defstruct gtype name %id)
7 (defvar *name-to-gtype* (make-hash-table :test 'equal))
8 (defvar *id-to-gtype* (make-hash-table))
9 (defvar *gtype-lock* (bt:make-lock "gtype lock"))
11 (defun invalidate-gtypes ()
12 (bt:with-lock-held (*gtype-lock*)
13 (clrhash *id-to-gtype*)
14 (iter (for (name gtype) in-hashtable *name-to-gtype*)
15 (setf (gtype-%id gtype) nil))))
17 (at-finalize () (invalidate-gtypes))
19 (defcfun (%g-type-from-name "g_type_from_name") g-type
22 (defcfun (%g-type-name "g_type_name") (:string :free-from-foreign nil)
25 (defun gtype-from-name (name)
26 (when (null name) (return-from gtype-from-name nil))
27 (bt:with-lock-held (*gtype-lock*)
28 (let ((type (gethash name *name-to-gtype*)))
30 (when (null (gtype-%id type))
31 (let ((n (%g-type-from-name name)))
33 (warn "GType ~A is not known to GObject" name)
35 (setf (gtype-%id type) n
36 (gethash n *id-to-gtype*) type)))))
37 (return-from gtype-from-name type)))
38 (let ((n (%g-type-from-name name)))
40 (warn "GType ~A is not known to GObject" name)
42 (let ((type (make-gtype :name (copy-seq name) :%id n)))
43 (setf (gethash n *id-to-gtype*) type
44 (gethash name *name-to-gtype*) type)
45 (return-from gtype-from-name type)))))
47 (defun gtype-from-id (id)
48 (when (zerop id) (return-from gtype-from-id nil))
49 (bt:with-lock-held (*gtype-lock*)
50 (let ((type (gethash id *id-to-gtype*)))
52 (return-from gtype-from-id type)))
53 (let ((name (%g-type-name id)))
55 (error "GType with ~A is not known to GObject" id))
56 (let ((type (gethash name *name-to-gtype*)))
58 (setf (gtype-%id type) id
59 (gethash id *id-to-gtype*) type)
60 (return-from gtype-from-id type))
61 (let ((type (make-gtype :name name :%id id)))
62 (setf (gethash id *id-to-gtype*) type
63 (gethash name *name-to-gtype*) type)
64 (return-from gtype-from-id type))))))
66 (defun gtype-id (gtype)
67 (when (null gtype) (return-from gtype-id 0))
68 (when (gtype-%id gtype) (return-from gtype-id (gtype-%id gtype)))
69 (bt:with-lock-held (*gtype-lock*)
70 (let ((n (%g-type-from-name (gtype-name gtype))))
72 (warn "GType ~A is not known to GObject" (gtype-name gtype))
73 (return-from gtype-id 0))
74 (setf (gtype-%id gtype) n
75 (gethash n *id-to-gtype*) gtype)
82 (string (gtype-from-name thing))
83 (integer (gtype-from-id thing))))
88 (define-compiler-macro gtype (&whole whole thing)
90 `(load-time-value (%gtype ,thing))
93 (define-foreign-type g-type-designator ()
94 ((mangled-p :initarg :mangled-p
95 :reader g-type-designator-mangled-p
97 :documentation "Whether the type designator is mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag"))
98 (:documentation "Values of this CFFI foreign type identify the GType. GType is designated by a its name (a string) or a numeric identifier. Functions accept GType designators as a string or integer and return them as a string. Functions @fun{g-type-name} and @fun{g-type-from-name} are used to convert between name and numeric identifier.
100 Numeric identifier of GType may be different between different program runs. But string identifier of GType does not change.")
101 (:actual-type g-type)
102 (:simple-parser g-type-designator))
104 (defun unmangle-g-type (g-type)
105 (logxor g-type (ldb (byte 1 0) g-type)));;subtract the G_SIGNAL_TYPE_STATIC_SCOPE
107 (defmethod translate-from-foreign (value (type g-type-designator))
108 (g-type-name (if (g-type-designator-mangled-p type)
109 (unmangle-g-type value)
112 (defmethod translate-to-foreign (value (type g-type-designator))
114 (string (g-type-from-name value))
118 (defun g-type-numeric (g-type-designator)
119 (etypecase g-type-designator
120 (string (g-type-from-name g-type-designator))
121 (integer g-type-designator)
124 (defun g-type-string (g-type-designator)
125 (etypecase g-type-designator
126 (string (g-type-name g-type-designator))
127 (integer (g-type-name g-type-designator))
130 (defcfun (g-type-name "g_type_name") :string
131 "Returns the name of a GType.@see{g-type-from-name}
135 \(g-type-from-name \"GtkLabel\")
137 \(g-type-name 7151952)
140 @arg[type]{GType designator (see @class{g-type-designator})}
142 (type g-type-designator))
144 (defcfun (g-type-from-name "g_type_from_name") g-type
145 "Returns the numeric identifier of a GType by its name. @see{g-type-name}
149 \(g-type-from-name \"GtkLabel\")
151 \(g-type-name 7151952)
154 @arg[name]{a string - name of GType}
158 (defun g-type= (type-1 type-2)
159 (= (g-type-numeric type-1)
160 (g-type-numeric type-2)))
162 (defun g-type/= (type-1 type-2)
163 (/= (g-type-numeric type-1)
164 (g-type-numeric type-2)))