GC_thread          97 gc/aix_irix_threads.c } * GC_thread;
GC_thread          85 gc/include/private/pthread_support.h } * GC_thread;
GC_thread          25 gc/include/private/solaris_threads.h   } * GC_thread;
GC_thread          61 gc/win32_threads.c typedef volatile struct GC_thread_Rep * GC_thread;