Defined in 4 files as a macro:
- contrib/ntp/lib/isc/nothreads/include/isc/mutex.h, line 29 (as a macro)
- contrib/ntp/lib/isc/pthreads/include/isc/mutex.h, line 84 (as a macro)
- contrib/ntp/lib/isc/pthreads/include/isc/mutex.h, line 87 (as a macro)
- contrib/ntp/lib/isc/win32/include/isc/mutex.h, line 41 (as a macro)