Defined in 4 files as a macro:
- contrib/ntp/lib/isc/nothreads/include/isc/mutex.h, line 33 (as a macro)
- contrib/ntp/lib/isc/pthreads/include/isc/mutex.h, line 102 (as a macro)
- contrib/ntp/lib/isc/pthreads/include/isc/mutex.h, line 106 (as a macro)
- contrib/ntp/lib/isc/win32/include/isc/mutex.h, line 45 (as a macro)