ZeroMQ for Chez Scheme
Install ZeroMQ
nix-env -iA nixos.zeromq
Load shared object
(load-shared-object
(format "~a/.nix-profile/lib/libzmq.so" (getenv "HOME"))); Copy bytevector into pointer
(define (ptr-put-bytevector ptr bv len)
(define ip (open-bytevector-input-port bv))
(do ([i 0 (add1 i)])
((or (negative? i) (>= i len)) (void))
(foreign-set! 'unsigned-8 ptr i (get-u8 ip))))
; Get bytevector from pointer
(define (ptr->bytevector ptr len)
(define-values (op g) (open-bytevector-output-port))
(do ([i 0 (add1 i)])
((or (negative? i) (>= i len)) (g))
(put-u8 op (foreign-ref 'unsigned-8 ptr i))))(import (zeromq))
(define context (zmq_ctx_new))
(define responder (zmq_socket context ZMQ_REP))
(assert (zero? (zmq_bind responder "tcp://*:5555")))
(define buffer (foreign-alloc 10))
(define nbytes (zmq_recv responder buffer 10 0))
(define msg (utf8->string (ptr->bytevector buffer nbytes)))
(format #t "received: ~s\n" msg)
(foreign-free buffer)
(zmq_close responder)
(zmq_ctx_destroy context)(import (zeromq))
(define context (zmq_ctx_new))
(define requester (zmq_socket context ZMQ_REQ))
(zmq_connect requester "tcp://localhost:5555")
(define buffer (foreign-alloc 10))
(ptr-put-bytevector buffer (string->utf8 "hey") 3)
(zmq_send requester buffer 3 0)
(foreign-free buffer)
(zmq_close requester)
(zmq_ctx_destroy context)