diff options
Diffstat (limited to 'guix/build/syscalls.scm')
| -rw-r--r-- | guix/build/syscalls.scm | 48 |
1 files changed, 3 insertions, 45 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 0cb630cfb3..25726b885e 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2015 David Thompson <davet@gnu.org> ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org> ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com> @@ -350,39 +350,6 @@ expansion-time error is raised if FIELD does not exist in TYPE." ;;; FFI. ;;; -(define %libc-errno-pointer - ;; Glibc's 'errno' pointer, for use with Guile < 2.0.12. - (let ((errno-loc (false-if-exception - (dynamic-func "__errno_location" (dynamic-link))))) - (and errno-loc - (let ((proc (pointer->procedure '* errno-loc '()))) - (proc))))) - -(define errno ;for Guile < 2.0.12 - (if %libc-errno-pointer - (let ((bv (pointer->bytevector %libc-errno-pointer (sizeof int)))) - (lambda () - "Return the current errno." - ;; XXX: We assume that nothing changes 'errno' while we're doing all this. - ;; In particular, that means that no async must be running here. - - ;; Use one of the fixed-size native-ref procedures because they are - ;; optimized down to a single VM instruction, which reduces the risk - ;; that we fiddle with 'errno' (needed on Guile 2.0.5, libc 2.11.) - (let-syntax ((ref (lambda (s) - (syntax-case s () - ((_ bv) - (case (sizeof int) - ((4) - #'(bytevector-s32-native-ref bv 0)) - ((8) - #'(bytevector-s64-native-ref bv 0)) - (else - (error "unsupported 'int' size" - (sizeof int))))))))) - (ref bv)))) - (lambda () 0))) - (define (call-with-restart-on-EINTR thunk) (let loop () (catch 'system-error @@ -406,17 +373,8 @@ the returned procedure is called." (lambda () (let ((ptr (dynamic-func name (dynamic-link)))) ;; The #:return-errno? facility was introduced in Guile 2.0.12. - ;; Support older versions of Guile by catching 'wrong-number-of-args'. - (catch 'wrong-number-of-args - (lambda () - (pointer->procedure return-type ptr argument-types - #:return-errno? #t)) - (lambda (key . rest) - (let ((proc (pointer->procedure return-type ptr argument-types))) - (lambda args - (let ((result (apply proc args)) - (err (errno))) - (values result err)))))))) + (pointer->procedure return-type ptr argument-types + #:return-errno? #t))) (lambda args (lambda _ (error (format #f "~a: syscall->procedure failed: ~s" |