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transactions: Amend pending transactions

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The transaction system contains a necessary optimization where a popped
transaction is combined with later, similar transactions. This breaks
the chronological order of states, and can lead to desynchronized
geometries.

To fix this, we replace the queue with only 2 transactions: current and
pending. If a pending transaction exists, it is updated with new state
instead of creating additional transactions.

As we never have more than a single waiting transaction, we no longer
need the queue optimization that is causing problems.

Closes: https://github.com/swaywm/sway/issues/6012
This commit is contained in:
Kenny Levinsen 2021-02-12 21:27:28 +01:00 • committed by Simon Ser
parent b944735b47
commit c8bf84c82d
3 changed files with 93 additions and 85 deletions
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2
sway/server.c
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@ -199,7 +199,6 @@ bool server_init(struct sway_server *server) {
}
server->dirty_nodes = create_list();
server->transactions = create_list();
server->input = input_manager_create(server);
input_manager_get_default_seat(); // create seat0
@ -215,7 +214,6 @@ void server_fini(struct sway_server *server) {
wl_display_destroy_clients(server->wl_display);
wl_display_destroy(server->wl_display);
list_free(server->dirty_nodes);
list_free(server->transactions);
}
bool server_start(struct sway_server *server) {