App: Periodic commands without timers/threads

Now the periodic commands get posted on the main thread at intervals, and the event loop cooperates by not sleeping if there are periodic commands pending.

The macOS animation hangup seems to be unrelated, though — perhaps some internal SDL/Metal machinery related to app refresh stopping for a while?

1 files changed, 10 insertions, 6 deletions

diff --git a/src/periodic.h b/src/periodic.h
index c643a2fe..db90b848 100644
--- a/src/periodic.h
+++ b/src/periodic.h
@@ -26,17 +26,21 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 iDeclareType(Periodic)
 iDeclareType(Thread)
 
-/* Animation utility. Not per frame but several times per second. */
+/* Animation utility. Not per frame but several times per second. Thread safe. */
 struct Impl_Periodic {
     iMutex *     mutex;
     iSortedArray commands;
-    iCondition   haveCommands;
-    iThread *    thread;
-    iAtomicInt   isStopping;
+    uint32_t     lastPostTime;
 };
 
 void    init_Periodic   (iPeriodic *);
 void    deinit_Periodic (iPeriodic *);
 
-void    add_Periodic    (iPeriodic *, iAny *context, const char *command);
-void    remove_Periodic (iPeriodic *, iAny *context);
+iLocalDef iBool isEmpty_Periodic(const iPeriodic *d) {
+    return isEmpty_SortedArray(&d->commands);
+}
+
+void    add_Periodic            (iPeriodic *, iAny *context, const char *command);
+void    remove_Periodic         (iPeriodic *, iAny *context);
+
+iBool   postCommands_Periodic   (iPeriodic *);