From 569a1e046ab959eda50543d4ccfdc94a9dfe62f0 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 27 May 2022 14:01:22 -0400
Subject: Gracefully handle attempt to schedule work with size 0

---
 src/worker.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/worker.c b/src/worker.c
index 5192066..476c11f 100644
--- a/src/worker.c
+++ b/src/worker.c
@@ -115,6 +115,11 @@ jalv_worker_schedule(LV2_Worker_Schedule_Handle handle,
 {
   JalvWorker* worker = (JalvWorker*)handle;
   Jalv*       jalv   = worker->jalv;
+
+  if (!size) {
+    return LV2_WORKER_ERR_UNKNOWN;
+  }
+
   if (worker->threaded) {
     // Schedule a request to be executed by the worker thread
     zix_ring_write(worker->requests, (const char*)&size, sizeof(size));
@@ -127,6 +132,7 @@ jalv_worker_schedule(LV2_Worker_Schedule_Handle handle,
       jalv->instance->lv2_handle, jalv_worker_respond, worker, size, data);
     zix_sem_post(&jalv->work_lock);
   }
+
   return LV2_WORKER_SUCCESS;
 }
 
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