;;; -*- Mode: Scheme; scheme48-package: (config) -*-

;;;;;; Rendezvous Concurrency Abstraction
;;;;;; Scheme48 Package Definitions

;;; This code is written by Taylor Campbell and placed in the Public
;;; Domain.  All warranties are disclaimed.

(define-structures ((rendezvous rendezvous-interface)
                    (rendezvous-builder rendezvous-builder-interface))
  (open scheme
        receiving
        srfi-9                          ; define-record-type
        srfi-23                         ; error
        define-synchronized-record-types
        variant-types
        suspensions

        time                            ; for timing rendezvous
        (subset threads-internal (register-dozer!))
        )
  (optimize auto-integrate)
  (files rendezvous
         s48-time))

(define-structure rendezvous-channels rendezvous-channels-interface
  (open scheme
        define-synchronized-record-types
        queues
        rendezvous
        rendezvous-builder
        )
  (optimize auto-integrate)
  (files channel))

(define-structure rendezvous-mailboxes rendezvous-mailboxes-interface
  (open scheme
        define-synchronized-record-types
        queues
        receiving
        rendezvous
        rendezvous-builder
        )
  (optimize auto-integrate)
  (files mailbox))

(define-structure rendezvous-placeholders
    rendezvous-placeholders-interface
  (open scheme
        define-synchronized-record-types
        signals
        rendezvous
        rendezvous-builder
        )
  (optimize auto-integrate)
  (files placeholder))

(define-structure rendezvous-semaphores
    rendezvous-semaphores-interface
  (open scheme
        srfi-9                          ; define-record-type
        variant-types
        queues
        threads
        rendezvous
        rendezvous-mailboxes
        rendezvous-channels
        rendezvous-placeholders
        )
  (optimize auto-integrate)
  (files semaphore))

;;;; Scheme Compatibility Interface

(define-structure suspensions suspensions-interface
  (open scheme
        receiving
        define-record-types
        cells
        queues
        threads
        threads-internal
        low-proposals
        )
  (optimize auto-integrate)
  (files s48-suspend))

(define-structure define-synchronized-record-types
    (export (define-synchronized-record-type :syntax))
  (open scheme
        (modify proposals
                (rename (define-synchronized-record-type
                         %define-synch-record-type)))
        )
  (begin
    (define-syntax define-synchronized-record-type
      (syntax-rules ()
        ((DEFINE-SYNCHRONIZED-RECORD-TYPE name . more)
         (%DEFINE-SYNCH-RECORD-TYPE name name . more))))
    ))

(define-structure variant-types
    (export (define-variant-type :syntax))
  (open scheme
        record-types
        records
        ;; not ENUMERATED -- see definition of DEFINE-ENUMERATION &
        ;; ENUM in the code
        enum-case
        code-quote
        destructuring
        signals
        util
        )
  (for-syntax (open scheme
                    destructuring
                    names
                    ))
  (files s48-variant-type))