diff options
Diffstat (limited to 'cpukit/score/include/rtems/system.h')
| -rw-r--r-- | cpukit/score/include/rtems/system.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/cpukit/score/include/rtems/system.h b/cpukit/score/include/rtems/system.h index 59d5b293af..9558155daf 100644 --- a/cpukit/score/include/rtems/system.h +++ b/cpukit/score/include/rtems/system.h @@ -135,6 +135,17 @@ extern "C" { # define RTEMS_INLINE_ROUTINE #endif +/** + * The following macro is a compiler specific way to ensure that memory + * writes are not reordered around certian points. This specifically can + * impact interrupt disable and thread dispatching critical sections. + */ +#ifdef __GNUC__ + #define RTEMS_COMPILER_MEMORY_BARRIER() asm volatile("" ::: "memory") +#else + #define RTEMS_COMPILER_MEMORY_BARRIER() +#endif + #ifdef RTEMS_POSIX_API /** The following is used by the POSIX implementation to catch bad paths. */ int POSIX_MP_NOT_IMPLEMENTED( void ); |