Flush platform stuff after timer events

It can happen that a timer event causes something to be queued to an
IOCP, which means that on Windows we need to flush that queue each time
a timer event fires during shutdown.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/core/lib/iomgr/iomgr.c b/src/core/lib/iomgr/iomgr.c
index 4fd83e0b22..3470b5ac81 100644
--- a/src/core/lib/iomgr/iomgr.c
+++ b/src/core/lib/iomgr/iomgr.c
@@ -108,6 +108,7 @@ void grpc_iomgr_shutdown(void) {
                          NULL)) {
       gpr_mu_unlock(&g_mu);
       grpc_exec_ctx_flush(&exec_ctx);
+      grpc_iomgr_platform_flush();
       gpr_mu_lock(&g_mu);
       continue;
     }