Arguments

 

structure_level

   OpenVMS usage:longword_unsigned
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Version of the symbiont/job controller interface. The structure_
   level argument is the address of a longword containing the
   version of the symbiont/job controller interface used when the
   symbiont was compiled. Always place the value of the symbol
   SMBMSG$K_STRUCTURE_LEVEL in the longword addressed by this
   argument. Each programming language provides an appropriate
   mechanism for defining symbols.
 

ast_routine

   OpenVMS usage:ast_procedure
   type:         procedure value
   access:       read only
   mechanism:    by reference
   Message-handling routine called at AST level. The ast_routine
   argument is the address of the entry point of the message-
   handling routine to be called at AST level when the symbiont
   receives a message from the job controller. The AST routine is
   called with no parameters and returns no value. If an AST routine
   is specified, the routine is called once each time the symbiont
   receives a message from the job controller.

   The AST routine typically reads the message and determines if
   immediate action must be taken. Be aware that an AST can be
   delivered only while the symbiont is operating at non-AST level.
   Thus, to ensure delivery of messages from the job controller, the
   symbiont should not perform lengthy operations at AST level.

   If you do not specify the ast_routine argument, the symbiont
   must call the SMB$CHECK_FOR_MESSAGE routine to check for waiting
   messages.
 

streams

   OpenVMS usage:longword_unsigned
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Maximum number of streams the symbiont is to support. The streams
   argument is the address of a longword containing the number of
   streams that the symbiont is to support. The number must be in
   the range of 1 to 32.

   If you do not specify this argument, a default value of 1 is
   used. Thus, by default, a symbiont supports one stream. Such a
   symbiont is called a single-threaded symbiont.

   A stream (or thread) is a logical link between a queue and a
   symbiont. When a symbiont is linked to more than one queue, and
   serves those queues simultaneously, it is called a multithreaded
   symbiont.