[ace-users] LynxOS + Timed Semaphores

[Sowayan, Abdullah (N-DUA)]

ACE VERSION: 5.5.9

LynxOS 4.0 doesn't have timed Semaphores, while LynxOS 4.2 does.

In $ACE_ROOT/ace/config-lynxos.h we find the following:

-------------------------------------------------------
#if ACE_LYNXOS_MAJOR == 4 && ACE_LYNXOS_MINOR == 0
# define ACE_LACKS_GETOPT_PROTOTYPE
# define ACE_LACKS_INET_ATON_PROTOTYPE
# define ACE_LACKS_REGEX_H
# define ACE_LACKS_STRCASECMP_PROTOTYPE
# define ACE_LACKS_STRNCASECMP_PROTOTYPE
# define ACE_LACKS_SYS_SELECT_H
# define ACE_HAS_NONCONST_GETBY
#endif

#if (ACE_LYNXOS_MAJOR > 4) || (ACE_LYNXOS_MAJOR == 4 && ACE_LYNXOS_MINOR
>= 2)
// LynxOS 4.2 additons
# define ACE_HAS_POSIX_SEM_TIMEOUT
# define ACE_HAS_MUTEX_TIMEOUTS
#endif
------------------------------------------------------

For LynxOS 4.2 we define ACE_HAS_POSIX_SEM_TIMEOUT because that feature
is available. My question is, since LynxOS 4.0 lacks native support for
timed semaphores, why don't we use ACE's built in emulation by defining
ACE_HAS_POSIX_SEM_TIMEOUT_EMULATION?

Thanks,
Abdul