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From 5dfdbc46524919521c9b3cc485100a54c0908016 Mon Sep 17 00:00:00 2001
From: Valentine Barshak <valentine.barshak@cogentembedded.com>
Date: Wed, 6 Mar 2019 00:19:06 +0300
Subject: [PATCH 4/7] Add display_poll function
---
clients/toytoolkit.h | 3 +++
clients/window.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 55 insertions(+)
diff --git a/clients/toytoolkit.h b/clients/toytoolkit.h
index 2bcecc1..a77eda3 100644
--- a/clients/toytoolkit.h
+++ b/clients/toytoolkit.h
@@ -163,6 +163,9 @@ display_unwatch_fd(struct display *display, int fd);
void
display_run(struct display *d);
+int
+display_poll(struct display *display, int timeout);
+
void
display_exit(struct display *d);
diff --git a/clients/window.c b/clients/window.c
index 43f20e2..9cd0e8e 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -6490,6 +6490,58 @@ display_run(struct display *display)
}
}
+int
+display_poll(struct display *display, int timeout)
+{
+ struct task *task;
+ struct epoll_event ep[16];
+ int i, count, ret;
+
+ display->running = 1;
+ while (!wl_list_empty(&display->deferred_list)) {
+ task = container_of(display->deferred_list.prev,
+ struct task, link);
+ wl_list_remove(&task->link);
+ task->run(task, 0);
+ }
+
+ /* ...prepare for a reading */
+ while (wl_display_prepare_read(display->display) != 0)
+ {
+ /* ...dispatch all pending events and repeat attempt */
+ wl_display_dispatch_pending(display->display);
+ }
+
+ /* ...flush all outstanding commands to a display */
+ if (wl_display_flush(display->display) < 0) {
+ return -1;
+ }
+
+ if (!display->running)
+ return -1;
+
+ count = epoll_wait(display->epoll_fd, ep, ARRAY_LENGTH(ep), timeout);
+ if (!count) {
+ wl_display_cancel_read(display->display);
+ return 0;
+ }
+
+ if (count > 0) {
+ /* ...read display events (if any) before we do any drawing */
+ if (wl_display_read_events(display->display) < 0) {
+ return -1;
+ }
+
+ /* ...process pending display events (if any) */
+ if (wl_display_dispatch_pending(display->display) < 0) {
+ return -1;
+ }
+ } else if (count < 0) {
+ wl_display_cancel_read(display->display);
+ return count;
+ }
+}
+
void
display_exit(struct display *display)
{
--
2.7.4
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