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System Services, $ACQUIRE GALAXY LOCK (Alpha Only), Arguments
 *Conan The Librarian 

 handle

    OpenVMS usage:galaxy lock handle
    type:         quadword (unsigned)
    access:       read
    mechanism:    input by value
    The 64-bit lock handle that identifies the lock to be acquired.
    This value is returned by SYS$CREATE_GALAXY_LOCK.

 timeout

    OpenVMS usage:wait timeout
    type:         longword (unsigned)
    access:       read
    mechanism:    input by value
    The 32-bit wait or spin timeout specified in 10 microsecond
    units. If not specified, defaults to 10 microseconds.

 flags

    OpenVMS usage:bit mask
    type:         longword (unsigned)
    access:       read
    mechanism:    input by value
    Control flags defined by the GLOCKDEF macro: GLOCK$C_NOBREAK,
    GLOCK$C_NOSPIN, and GLOCK$C_NOWAIT.
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