54 lines
1.6 KiB
Diff
54 lines
1.6 KiB
Diff
From 1da99396dc65993ba34ac0370ca5d6acda6a3322 Mon Sep 17 00:00:00 2001
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From: Mark H Weaver <mhw@netris.org>
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Date: Sun, 18 Mar 2018 07:02:37 -0400
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Subject: [PATCH] Add support for gdbm-1.14.
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As of gdbm-1.14, 'gdbm_errno' no longer exists as a binary interface.
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It has been replaced by 'gdbm_errno_location', a function that returns
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int*. We now use this new interface if it's available.
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---
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gdbm.scm | 18 ++++++++++++++++--
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1 file changed, 16 insertions(+), 2 deletions(-)
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diff --git a/gdbm.scm b/gdbm.scm
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index b92992f..4d38cc3 100644
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--- a/gdbm.scm
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+++ b/gdbm.scm
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@@ -17,6 +17,9 @@
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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+;; Modified by Mark H Weaver <mhw@netris.org> in March 2018 to support
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+;; gdbm-1.14 with its new 'gdbm_errno_location' interface.
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+
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(define-module (gdbm)
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#:use-module (system foreign)
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#:use-module (rnrs bytevectors)
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@@ -151,10 +154,21 @@
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;;; errors
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-(define %errno (dynamic-pointer "gdbm_errno" libgdbm))
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+(define %list-int
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+ (list int))
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+
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+(define (dereference-int ptr)
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+ (apply (lambda (errno) errno)
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+ (parse-c-struct ptr %list-int)))
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+
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+(define %errno-location
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+ (or (false-if-exception
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+ (let ((func (dynamic-func "gdbm_errno_location" libgdbm)))
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+ (pointer->procedure '* func '())))
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+ (const (dynamic-pointer "gdbm_errno" libgdbm))))
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(define (gdbm-errno)
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- (pointer-address (dereference-pointer %errno)))
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+ (dereference-int (%errno-location)))
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(define (gdbm-error)
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(error (pointer->string (%gdbm-strerror (gdbm-errno)))))
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--
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2.16.2
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