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LibCore: Make CObject reference-counted

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Okay, I've spent a whole day on this now, and it finally kinda works!
With this patch, CObject and all of its derived classes are reference
counted instead of tree-owned.

The previous, Qt-like model was nice and familiar, but ultimately also
outdated and difficult to reason about.

CObject-derived types should now be stored in RefPtr/NonnullRefPtr and
each class can be constructed using the forwarding construct() helper:

    auto widget = GWidget::construct(parent_widget);

Note that construct() simply forwards all arguments to an existing
constructor. It is inserted into each class by the C_OBJECT macro,
see CObject.h to understand how that works.

CObject::delete_later() disappears in this patch, as there is no longer
a single logical owner of a CObject.
This commit is contained in:
Andreas Kling 2019-09-22 00:17:53 +02:00
parent 0c72e0c09f
commit bc319d9e88
45 changed files with 174 additions and 233 deletions
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8
Userland/avol.cpp
View file

@ -5,15 +5,15 @@
int main(int argc, char** argv)
{
CEventLoop loop;
AClientConnection a_conn;
a_conn.handshake();
auto audio_client = AClientConnection::construct();
audio_client->handshake();
if (argc > 1) {
int new_volume = atoi(argv[1]);
a_conn.set_main_mix_volume(new_volume);
audio_client->set_main_mix_volume(new_volume);
}
int volume = a_conn.get_main_mix_volume();
int volume = audio_client->get_main_mix_volume();
printf("Volume: %d\n", volume);
return 0;
}