diff options
Diffstat (limited to 'guix/store.scm')
| -rw-r--r-- | guix/store.scm | 63 |
1 files changed, 59 insertions, 4 deletions
diff --git a/guix/store.scm b/guix/store.scm index 2acab6b1a3..b584caa073 100644 --- a/guix/store.scm +++ b/guix/store.scm @@ -322,12 +322,16 @@ (define-record-type <nix-server> (%make-nix-server socket major minor + buffer flush ats-cache atts-cache) nix-server? (socket nix-server-socket) (major nix-server-major-version) (minor nix-server-minor-version) + (buffer nix-server-output-port) ;output port + (flush nix-server-flush-output) ;thunk + ;; Caches. We keep them per-connection, because store paths build ;; during the session are temporary GC roots kept for the duration of ;; the session. @@ -481,7 +485,11 @@ for this connection will be pinned. Return a server object." (&nix-connection-error (file (or port uri)) (errno EPROTO)) (&message (message "build daemon handshake failed")))))) - (let ((port (or port (connect-to-daemon uri)))) + (let*-values (((port) + (or port (connect-to-daemon uri))) + ((output flush) + (buffering-output-port port + (make-bytevector 8192)))) (write-int %worker-magic-1 port) (let ((r (read-int port))) (and (eqv? r %worker-magic-2) @@ -499,12 +507,18 @@ for this connection will be pinned. Return a server object." (let ((conn (%make-nix-server port (protocol-major v) (protocol-minor v) + output flush (make-hash-table 100) (make-hash-table 100)))) (let loop ((done? (process-stderr conn))) (or done? (process-stderr conn))) conn))))))))) +(define (write-buffered-output server) + "Flush SERVER's output port." + (force-output (nix-server-output-port server)) + ((nix-server-flush-output server))) + (define (close-connection server) "Close the connection to SERVER." (close (nix-server-socket server))) @@ -718,6 +732,44 @@ encoding conversion errors." (let loop ((done? (process-stderr server))) (or done? (process-stderr server))))) +(define (buffering-output-port port buffer) + "Return two value: an output port wrapped around PORT that uses BUFFER (a +bytevector) as its internal buffer, and a thunk to flush this output port." + ;; Note: In Guile 2.2.2, custom binary output ports already have their own + ;; 4K internal buffer. + (define size + (bytevector-length buffer)) + + (define total 0) + + (define (flush) + (put-bytevector port buffer 0 total) + (set! total 0)) + + (define (write bv offset count) + (if (zero? count) ;end of file + (flush) + (let loop ((offset offset) + (count count) + (written 0)) + (cond ((= total size) + (flush) + (loop offset count written)) + ((zero? count) + written) + (else + (let ((to-copy (min count (- size total)))) + (bytevector-copy! bv offset buffer total to-copy) + (set! total (+ total to-copy)) + (loop (+ offset to-copy) (- count to-copy) + (+ written to-copy)))))))) + + ;; Note: We need to return FLUSH because the custom binary port has no way + ;; to be notified of a 'force-output' call on itself. + (values (make-custom-binary-output-port "buffering-output-port" + write #f #f flush) + flush)) + (define %rpc-calls ;; Mapping from RPC names (symbols) to invocation counts. (make-hash-table)) @@ -755,11 +807,14 @@ encoding conversion errors." ((_ (name (type arg) ...) docstring return ...) (lambda (server arg ...) docstring - (let ((s (nix-server-socket server))) + (let* ((s (nix-server-socket server)) + (buffered (nix-server-output-port server))) (record-operation 'name) - (write-int (operation-id name) s) - (write-arg type arg s) + (write-int (operation-id name) buffered) + (write-arg type arg buffered) ... + (write-buffered-output server) + ;; Loop until the server is done sending error output. (let loop ((done? (process-stderr server))) (or done? (loop (process-stderr server)))) |