02/03: gnu: Add liburcu.

[Tobias Geerinckx-Rice]

nckx pushed a commit to branch master
in repository guix.

commit 754667f0eb44491370a2ec4fa0b4705cfcf6d237
Author: Tobias Geerinckx-Rice <address@hidden>
Date:   Sun Oct 30 16:32:22 2016 +0100

    gnu: Add liburcu.
    
    * gnu/packages/datastructures.scm (liburcu): New variable.
---
 gnu/packages/datastructures.scm | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/datastructures.scm b/gnu/packages/datastructures.scm
index b9e6061..ef249b9 100644
--- a/gnu/packages/datastructures.scm
+++ b/gnu/packages/datastructures.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015, 2016 Ricardo Wurmus <address@hidden>
-;;; Copyright © 2016 Tobias Geerinckx-Rice <address@hidden>
+;;; Copyright © 2016, 2017 Tobias Geerinckx-Rice <address@hidden>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -19,6 +19,7 @@
 
 (define-module (gnu packages datastructures)
   #:use-module (gnu packages)
+  #:use-module (gnu packages perl)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix download)
@@ -92,3 +93,26 @@ hashes (CTPH), also called fuzzy checksums.  It can identify 
similar files
 that have sequences of identical bytes in the same order, even though bytes
 in between these sequences may be different in both content and length.")
     (license license:gpl2+)))
+
+(define-public liburcu
+  (package
+    (name "liburcu")
+    (version "0.9.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://www.lttng.org/files/urcu/";
+                                  "userspace-rcu-" version ".tar.bz2"))
+              (sha256
+               (base32
+                "01j0xp3f0w147yfyzybkjvb7i67i7prsvnkssgvgwry9lvk35khv"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("perl" ,perl)))                 ; for tests
+    (home-page "http://liburcu.org/";)
+    (synopsis "User-space RCU data synchronisation library")
+    (description "liburcu is a user-space @dfn{Read-Copy-Update} (RCU) data
+synchronisation library.  It provides read-side access that scales linearly
+with the number of cores.  liburcu-cds provides efficient data structures
+based on RCU and lock-free algorithms.  These structures include hash tables,
+queues, stacks, and doubly-linked lists.")
+    (license license:lgpl2.1+)))