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| author | Ludovic Courtès <ludo@gnu.org> | 2019-02-06 21:58:43 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2019-02-06 23:06:18 +0100 |
| commit | 8245bb74fc7bdcdc2f9d458057cefc9cd982e489 (patch) | |
| tree | 9485861a2715bb21173e80a1f4258eea1450326e /gnu | |
| parent | d59124280851c5d62b6ecf5aa07f6b4f6520a0e5 (diff) | |
| download | guix-8245bb74fc7bdcdc2f9d458057cefc9cd982e489.tar.gz guix-8245bb74fc7bdcdc2f9d458057cefc9cd982e489.zip | |
monads, gexp: Prevent redefinition of syntax parameters.
Fixes <https://bugs.gnu.org/27476>.
This fixes multi-threaded compilation of this code where syntax
parameters could end up being redefined and where a race condition could
lead a thread to see the "wrong" value of the syntax parameter.
* guix/monads.scm (define-syntax-parameter-once): New macro.
(>>=, return): Use it.
* guix/gexp.scm (define-syntax-parameter-once): New macro.
(current-imported-modules, current-imported-extensions): Use it.
Diffstat (limited to 'gnu')
0 files changed, 0 insertions, 0 deletions