update ipc.h

src/runtime/c/pgf/ipc.h

@@ -2,6 +2,9 @@
 #define IPC_H
 
 PGF_INTERNAL_DECL
-pthread_rwlock_t *pgf_acquire_file_rwlock(const char* file_path);
+pthread_rwlock_t *ipc_new_file_rwlock(const char* file_path);
+
+PGF_INTERNAL
+void ipc_release_file_rwlock(const char* file_path);
 
 #endif