1 ;;; geiser-connection.el -- talking to a scheme process
3 ;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
5 ;; This program is free software; you can redistribute it and/or
6 ;; modify it under the terms of the Modified BSD License. You should
7 ;; have received a copy of the license along with this program. If
8 ;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
10 ;; Start date: Sat Feb 07, 2009 21:11
14 ;; Connection datatype and functions for managing request queues
15 ;; between emacs and inferior guile processes.
18 (require 'geiser-syntax
)
19 (require 'geiser-base
)
20 (require 'geiser-impl
)
25 ;;; Buffer connections:
27 (make-variable-buffer-local
28 (defvar geiser-con--connection nil
))
30 (defun geiser-con--get-connection (buffer/proc
)
31 (if (processp buffer
/proc
)
32 (geiser-con--get-connection (process-buffer buffer
/proc
))
33 (with-current-buffer buffer
/proc geiser-con--connection
)))
38 (defun geiser-con--make-request (con str cont
&optional sender-buffer
)
39 (list (cons :id
(geiser-con--connection-inc-count con
))
41 (cons :continuation cont
)
42 (cons :buffer
(or sender-buffer
(current-buffer)))
43 (cons :connection con
)))
45 (defsubst geiser-con--request-id
(req)
46 (cdr (assoc :id req
)))
48 (defsubst geiser-con--request-string
(req)
49 (cdr (assoc :string req
)))
51 (defsubst geiser-con--request-continuation
(req)
52 (cdr (assoc :continuation req
)))
54 (defsubst geiser-con--request-buffer
(req)
55 (cdr (assoc :buffer req
)))
57 (defsubst geiser-con--request-connection
(req)
58 (cdr (assoc :connection req
)))
60 (defsubst geiser-con--request-deactivate
(req)
61 (setcdr (assoc :continuation req
) nil
))
63 (defsubst geiser-con--request-deactivated-p
(req)
64 (null (cdr (assoc :continuation req
))))
67 ;;; Connection datatype:
69 (defun geiser-con--combined-prompt (prompt debug
)
70 (format "\\(%s%s\\)" prompt
(if debug
(format "\\|%s" debug
) "")))
72 (defun geiser-con--connection-eot-re (prompt debug
)
73 (geiser-con--combined-prompt (format "\n%s" prompt
)
74 (and debug
(format "\n%s" debug
))))
76 (defun geiser-con--make-connection (proc prompt debug-prompt
)
78 (cons :filter
(process-filter proc
))
79 (cons :tq
(tq-create proc
))
80 (cons :tq-filter
(process-filter proc
))
81 (cons :eot
(geiser-con--connection-eot-re prompt debug-prompt
))
83 (cons :debug-prompt debug-prompt
)
85 (cons :completed
(make-hash-table :weakness
'value
))))
87 (defsubst geiser-con--connection-process
(c)
88 (tq-process (cdr (assoc :tq c
))))
90 (defsubst geiser-con--connection-filter
(c)
91 (cdr (assoc :filter c
)))
93 (defsubst geiser-con--connection-tq-filter
(c)
94 (cdr (assoc :tq-filter c
)))
96 (defsubst geiser-con--connection-tq
(c)
99 (defsubst geiser-con--connection-eot
(c)
100 (cdr (assoc :eot c
)))
102 (defsubst geiser-con--connection-prompt
(c)
103 (cdr (assoc :prompt c
)))
105 (defsubst geiser-con--connection-debug-prompt
(c)
106 (cdr (assoc :debug-prompt c
)))
108 (defsubst geiser-con--connection-completed
(c r
)
109 (geiser-con--request-deactivate r
)
110 (puthash (geiser-con--request-id r
) r
(cdr (assoc :completed c
))))
112 (defsubst geiser-con--connection-completed-p
(c id
)
113 (gethash id
(cdr (assoc :completed c
))))
115 (defun geiser-con--connection-inc-count (c)
116 (let* ((cnt (assoc :count c
))
117 (new (1+ (cdr cnt
))))
121 (defun geiser-con--has-entered-debugger (con answer
)
122 (let ((dp (geiser-con--connection-debug-prompt con
)))
123 (and (stringp dp
) (string-match dp answer
))))
125 (defun geiser-con--connection-close (con)
126 (let ((tq (geiser-con--connection-tq con
)))
127 (and tq
(tq-close tq
))))
129 (defvar geiser-con--startup-prompt nil
)
130 (defun geiser-con--startup-prompt (p s
)
131 (setq geiser-con--startup-prompt
132 (concat geiser-con--startup-prompt s
))
135 (defun geiser-con--connection-deactivate (c &optional no-wait
)
137 (let* ((tq (geiser-con--connection-tq c
))
138 (proc (geiser-con--connection-process c
))
139 (proc-filter (geiser-con--connection-filter c
)))
141 (while (and (not (tq-queue-empty tq
))
142 (accept-process-output proc
0.1))))
143 (set-process-filter proc proc-filter
)
146 (defun geiser-con--connection-activate (c)
148 (let* ((tq (geiser-con--connection-tq c
))
149 (proc (geiser-con--connection-process c
))
150 (tq-filter (geiser-con--connection-tq-filter c
)))
151 (while (accept-process-output proc
0.01))
152 (set-process-filter proc tq-filter
)
156 ;;; Requests handling:
158 (defun geiser-con--req-form (req answer
)
159 (let ((con (geiser-con--request-connection req
)))
160 (if (geiser-con--has-entered-debugger con answer
)
161 `((error (key . geiser-debugger
))
164 (let ((form (car (read-from-string answer
))))
165 (and (listp form
) form
))
166 (error `((error (key . geiser-con-error
))
167 (output .
,(format "%s\n(%s)"
169 (error-message-string err
)))))))))
171 (defun geiser-con--process-completed-request (req answer
)
172 (let ((cont (geiser-con--request-continuation req
))
173 (id (geiser-con--request-id req
))
174 (rstr (geiser-con--request-string req
))
175 (form (geiser-con--req-form req answer
))
176 (buffer (or (geiser-con--request-buffer req
) (current-buffer)))
177 (con (geiser-con--request-connection req
)))
179 (geiser-log--warn "<%s> Droping result for request %S: %s"
182 (with-current-buffer buffer
184 (geiser-log--info "<%s>: processed" id
))
185 (error (geiser-log--error
186 "<%s>: continuation failed %S \n\t%s" id rstr cerr
))))
187 (geiser-con--connection-completed con req
)))
189 (defun geiser-con--connection-add-request (c r
)
190 (geiser-log--info "REQUEST: <%s>: %s"
191 (geiser-con--request-id r
)
192 (geiser-con--request-string r
))
193 (geiser-con--connection-activate c
)
194 (tq-enqueue (geiser-con--connection-tq c
)
195 (concat (geiser-con--request-string r
) "\n")
196 (geiser-con--connection-eot c
)
198 'geiser-con--process-completed-request
202 ;;; Message sending interface:
204 (defun geiser-con--send-string (con str cont
&optional sbuf
)
205 (let ((req (geiser-con--make-request con str cont sbuf
)))
206 (geiser-con--connection-add-request con req
)
209 (defvar geiser-connection-timeout
30000
210 "Time limit, in msecs, blocking on synchronous evaluation requests")
212 (defun geiser-con--send-string/wait
(con str cont
&optional timeout sbuf
)
214 (let ((proc (and con
(geiser-con--connection-process con
))))
215 (unless proc
(error "Geiser connection not active"))
216 (let* ((req (geiser-con--send-string con str cont sbuf
))
217 (id (geiser-con--request-id req
))
218 (timeout (/ (or timeout geiser-connection-timeout
) 1000.0)))
219 (with-timeout (timeout (geiser-con--request-deactivate req
))
221 (while (and (geiser-con--connection-process con
)
222 (not (geiser-con--connection-completed-p con id
)))
223 (accept-process-output proc
(/ timeout
10)))
224 (error (geiser-con--request-deactivate req
))))))))
227 (provide 'geiser-connection
)