Error out if an error occurs in a raytracing worker thread.

1 files changed, 8 insertions, 1 deletions

diff --git a/libdimension/raytrace.c b/libdimension/raytrace.c
index 396c8b4..98f941b 100644
--- a/libdimension/raytrace.c
+++ b/libdimension/raytrace.c
@@ -118,10 +118,17 @@ dmnsn_raytrace_scene_thread(void *ptr)
     }
 
     for (int i = 0; i < nthreads; ++i) {
-      if (pthread_join(threads[i], NULL)) {
+      void *ptr = NULL;
+      if (pthread_join(threads[i], &ptr)) {
         dmnsn_error(DMNSN_SEVERITY_MEDIUM,
                     "Couldn't join worker thread in raytrace engine.");
       }
+      if (ptr) {
+        int retval = *(int *)ptr;
+        dmnsn_free(ptr);
+        if (retval != 0)
+          dmnsn_error(DMNSN_SEVERITY_HIGH, "Error occurred in worker thread.");
+      }
     }
   dmnsn_complete_timer(payload->scene->render_timer);