eval: implement timers. vim-patch: 7.4.1578, 7.4.1831

For the moment, timers are triggered during sleep,
but not in wait-for-input modes, like press-RETURN or f_getchar()

2 files changed, 6 insertions, 0 deletions

diff --git a/src/nvim/event/time.c b/src/nvim/event/time.c
index 7bf333bcea..f68a66345f 100644
--- a/src/nvim/event/time.c
+++ b/src/nvim/event/time.c
@@ -17,6 +17,7 @@ void time_watcher_init(Loop *loop, TimeWatcher *watcher, void *data)
   watcher->uv.data = watcher;
   watcher->data = data;
   watcher->events = loop->fast_events;
+  watcher->blockable = false;
 }
 
 void time_watcher_start(TimeWatcher *watcher, time_cb cb, uint64_t timeout,
@@ -50,6 +51,10 @@ static void time_watcher_cb(uv_timer_t *handle)
   FUNC_ATTR_NONNULL_ALL
 {
   TimeWatcher *watcher = handle->data;
+  if (watcher->blockable && !queue_empty(watcher->events)) {
+    // the timer blocked and there already is an unprocessed event waiting
+    return;
+  }
   CREATE_EVENT(watcher->events, time_event, 1, watcher);
 }
 
diff --git a/src/nvim/event/time.h b/src/nvim/event/time.h
index 7882b2b627..14df176ea3 100644
--- a/src/nvim/event/time.h
+++ b/src/nvim/event/time.h
@@ -13,6 +13,7 @@ struct time_watcher {
   void *data;
   time_cb cb, close_cb;
   Queue *events;
+  bool blockable;
 };
 
 #ifdef INCLUDE_GENERATED_DECLARATIONS