IAR Embedded Workbench for RH850 3.20.xIAR C/C++ DevelopmentC/C++ standard library functionsDLIB runtime environment—implementation detailsAtomic operationsAtomic operationsIn this section: Atomic operations using the files stdatomic.h and atomic are not available in the IAR C/C++ Compiler for RH850. The predefined preprocessor symbol __STDC_NO_ATOMICS__ is always defined to 1. This is true both in C and C++.