MiniObject

#GstMiniObject is a simple structure that can be used to implement refcounted types.

Subclasses will include #GstMiniObject as the first member in their structure and then call gst.mini_object.MiniObject.init_ to initialize the #GstMiniObject fields.

gst.mini_object.MiniObject.ref_ and gst.mini_object.MiniObject.unref increment and decrement the refcount respectively. When the refcount of a mini-object reaches 0, the dispose function is called first and when this returns true, the free function of the miniobject is called.

A copy can be made with gst.mini_object.MiniObject.copy.

gst.mini_object.MiniObject.isWritable will return true when the refcount of the object is exactly 1 and there is no parent or a single parent exists and is writable itself, meaning the current caller has the only reference to the object. gst.mini_object.MiniObject.makeWritable will return a writable version of the object, which might be a new copy when the refcount was not 1.

Opaque data can be associated with a #GstMiniObject with gst.mini_object.MiniObject.setQdata and gst.mini_object.MiniObject.getQdata. The data is meant to be specific to the particular object and is not automatically copied with gst.mini_object.MiniObject.copy or similar methods.

A weak reference can be added and remove with gst.mini_object.MiniObject.weakRef and gst.mini_object.MiniObject.weakUnref respectively.

class MiniObject : Boxed {

void addParent(gst.mini_object.MiniObject parent);

void* getQdata(glib.types.Quark quark);

bool isWritable();

bool lock(gst.types.LockFlags flags);

void removeParent(gst.mini_object.MiniObject parent);

void setQdata(glib.types.Quark quark, void* data, glib.types.DestroyNotify destroy);

void* stealQdata(glib.types.Quark quark);

void unlock(gst.types.LockFlags flags);

static bool replace(gst.mini_object.MiniObject olddata, gst.mini_object.MiniObject newdata);

static bool take(gst.mini_object.MiniObject olddata, gst.mini_object.MiniObject newdata);

}

Members

Functions

addParent void addParent(gst.mini_object.MiniObject parent): This adds parent as a parent for object. Having one ore more parents affects the writability of object: if a parent is not writable, object is also not writable, regardless of its refcount. object is only writable if all the parents are writable and its own refcount is exactly 1.
getQdata void* getQdata(glib.types.Quark quark): This function gets back user data pointers stored via gst.mini_object.MiniObject.setQdata.
isWritable bool isWritable(): If mini_object has the LOCKABLE flag set, check if the current EXCLUSIVE lock on object is the only one, this means that changes to the object will not be visible to any other object.
lock bool lock(gst.types.LockFlags flags): Lock the mini-object with the specified access mode in flags.
removeParent void removeParent(gst.mini_object.MiniObject parent): This removes parent as a parent for object. See gst.mini_object.MiniObject.addParent.
setQdata void setQdata(glib.types.Quark quark, void* data, glib.types.DestroyNotify destroy): This sets an opaque, named pointer on a miniobject. The name is specified through a #GQuark (retrieved e.g. via glib.global.quarkFromStaticString), and the pointer can be gotten back from the object with gst.mini_object.MiniObject.getQdata until the object is disposed. Setting a previously set user data pointer, overrides (frees) the old pointer set, using null as pointer essentially removes the data stored.
stealQdata void* stealQdata(glib.types.Quark quark): This function gets back user data pointers stored via gst.mini_object.MiniObject.setQdata and removes the data from object without invoking its destroy() function (if any was set).
unlock void unlock(gst.types.LockFlags flags): Unlock the mini-object with the specified access mode in flags.

Static functions

replace bool replace(gst.mini_object.MiniObject olddata, gst.mini_object.MiniObject newdata): Atomically modifies a pointer to point to a new mini-object. The reference count of olddata is decreased and the reference count of newdata is increased.
take bool take(gst.mini_object.MiniObject olddata, gst.mini_object.MiniObject newdata): Modifies a pointer to point to a new mini-object. The modification is done atomically. This version is similar to gst.mini_object.MiniObject.replace except that it does not increase the refcount of newdata and thus takes ownership of newdata.

Inherited Members

From Boxed

cInstancePtr void* cInstancePtr;: Pointer to the C boxed value
getType GType getType(): Get the GType of this boxed type.
gType GType gType [@property getter]: Boxed GType property.
self Boxed self(): Convenience method to return this cast to a type. For use in D with statements.
copy_ void* copy_(): Make a copy of the wrapped C boxed data.
boxedCopy void* boxedCopy(void* cBoxed): Copy a C boxed value using g_boxed_copy.
boxedFree void boxedFree(void* cBoxed): Free a C boxed value using g_boxed_free.

gst mini_object classes

MiniObject