GC_TEST_AND_SET_DEFINED  374 gc/include/private/gc_locks.h #  if defined(GC_TEST_AND_SET_DEFINED) && !defined(GC_CLEAR_DEFINED)
GC_TEST_AND_SET_DEFINED  390 gc/include/private/gc_locks.h #  if !defined(GC_TEST_AND_SET_DEFINED)
GC_TEST_AND_SET_DEFINED 2337 gc/os_dep.c    #ifdef GC_TEST_AND_SET_DEFINED