Fix threading

1 files changed, 17 insertions, 1 deletions

diff --git a/include/grpc/support/sync.h b/include/grpc/support/sync.h
index fe8a59a5d6..3e3f1925ce 100644
--- a/include/grpc/support/sync.h
+++ b/include/grpc/support/sync.h
@@ -274,7 +274,23 @@ GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c);
 #endif /* 0 */
 
 #ifdef __cplusplus
-}
+} // extern "C"
+
+namespace grpc_core {
+
+class mu_guard {
+public:
+  mu_guard(gpr_mu *mu) : mu_(mu) { gpr_mu_lock(mu); }
+  ~mu_guard() { gpr_mu_unlock(mu_); }
+
+  mu_guard(const mu_guard&) = delete;
+  mu_guard& operator=(const mu_guard&) = delete;
+
+private:
+  gpr_mu* const mu_;
+};
+
+} // namespace grpc_core
 #endif
 
 #endif /* GRPC_SUPPORT_SYNC_H */