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tt_prequest_create(3)


CDE


NAME

  tt_prequest_create - create a procedure request message


SYNOPSIS

  #include <tt_c.h>
  Tt_message tt_prequest_create(Tt_scope scope,
				const char *op);


DESCRIPTION

  The tt_prequest_create function creates a message.  The created message
  created contains the following:

  Tt_address = TT_PROCEDURE Tt_class = TT_REQUEST

  The application can use the returned handle to add arguments and other
  attributes, and to send the message.

  The scope argument determines which processes are eligible to receive the
  message. The following values are defined:

  TT_SESSION
      All processes joined to the indicated session are eligible.

  TT_FILE
      All processes joined to the indicated file are eligible.

  TT_BOTH
      All processes joined to either indicated file or the indicated session
      are eligible.

  TT_FILE_IN_SESSION
      All processes joined to both the indicated file and the indicated
      session are eligible.

  The op argument is the operation to be performed by the receiving process.


RETURN VALUE

  Upon successful completion, the tt_prequest_create function returns the
  unique handle that identifies this message. The application can use
  tt_ptr_error(3) to extract one of the following Tt_status values from the
  returned handle:

  TT_OK
      The operation completed successfully.

  TT_ERR_NOMP
      The ttsession(1) process is not running and the ToolTalk service cannot
      restart it.

  TT_ERR_PROCID
      The specified process identifier is out of date or invalid.


APPLICATION USAGE

  The application should use tt_free(3) to free any data stored in the
  address returned by the ToolTalk API.

  If the ToolTalk service is unable to create a message when requested,
  tt_prequest_create returns an invalid handle. When the application attempts
  to use this handle with another ToolTalk function, the ToolTalk service
  will return TT_ERR_POINTER.


SEE ALSO

  tt_c.h(5), tt_ptr_error(3), tt_free(3)

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