Removing instances of exec_ctx being passed around in functions in

src/core. exec_ctx is now a thread_local pointer of type ExecCtx instead of
grpc_exec_ctx which is initialized whenever ExecCtx is instantiated. ExecCtx
also keeps track of the previous exec_ctx so that nesting of exec_ctx is
allowed. This means that there is only one exec_ctx being used at any
time. Also, grpc_exec_ctx_finish is called in the destructor of the
object, and the previous exec_ctx is restored to avoid breaking current
functionality. The code still explicitly calls grpc_exec_ctx_finish
because removing all such instances causes the code to break.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/core/lib/iomgr/iomgr_uv.cc b/src/core/lib/iomgr/iomgr_uv.cc
index df5d23af3b..4dda970286 100644
--- a/src/core/lib/iomgr/iomgr_uv.cc
+++ b/src/core/lib/iomgr/iomgr_uv.cc
@@ -29,12 +29,12 @@
 gpr_thd_id g_init_thread;
 
 void grpc_iomgr_platform_init(void) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  ExecCtx _local_exec_ctx;
   grpc_pollset_global_init();
   grpc_register_tracer(&grpc_tcp_trace);
-  grpc_executor_set_threading(&exec_ctx, false);
+  grpc_executor_set_threading(false);
   g_init_thread = gpr_thd_currentid();
-  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_exec_ctx_finish();
 }
 void grpc_iomgr_platform_flush(void) {}
 void grpc_iomgr_platform_shutdown(void) { grpc_pollset_global_shutdown(); }