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, 4 insertions, 4 deletions

diff --git a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
index 06ae342985..43735eed0e 100644
--- a/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack_trickle.cc
@@ -172,13 +172,13 @@ class TrickledCHTTP2 : public EndpointPairFixture {
   }
 
   void Step(bool update_stats) {
-    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    ExecCtx _local_exec_ctx;
     inc_time();
     size_t client_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.client);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.client);
     size_t server_backlog =
-        grpc_trickle_endpoint_trickle(&exec_ctx, endpoint_pair_.server);
-    grpc_exec_ctx_finish(&exec_ctx);
+        grpc_trickle_endpoint_trickle(endpoint_pair_.server);
+    grpc_exec_ctx_finish();
     if (update_stats) {
       UpdateStats((grpc_chttp2_transport*)client_transport_, &client_stats_,
                   client_backlog);