[bug#56202] [PATCH] gnu: Add nsync.

[Antero Mejr]

* gnu/packages/c.scm (nsync): New variable.
---
 gnu/packages/c.scm | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/gnu/packages/c.scm b/gnu/packages/c.scm
index 3e49539473..9f7e6891b9 100644
--- a/gnu/packages/c.scm
+++ b/gnu/packages/c.scm
@@ -14,6 +14,7 @@
 ;;; Copyright © 2021 David Dashyan <mail@davie.li>
 ;;; Copyright © 2021 Foo Chuan Wei <chuanwei.foo@hotmail.com>
 ;;; Copyright © 2022 (unmatched parenthesis <paren@disroot.org>
+;;; Copyright © 2022 Antero Mejr <antero@mailbox.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1134,3 +1135,31 @@ (define-public utf8-h
 C and C++.  The functions it provides are like those from the C header
 string.h, but with a utf8* prefix instead of the str* prefix.")
       (license license:unlicense))))
+
+(define-public nsync
+  (package
+    (name "nsync")
+    (version "1.24.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/google/nsync";)
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0737jcjw5nxv34zs7ppp6hqimb79k51kjiavgg0ygsfi22a6s0ld"))))
+    (build-system cmake-build-system)
+    (home-page "https://github.com/google/nsync";)
+    (synopsis "C library for synchronization primitives")
+    (description
+     "nsync is a C library that exports various synchronization primitives:
+@enumerate
+@item locks
+@item condition variables
+@item run-once initialization
+@item waitable counter (useful for barriers)
+@item waitable bit (useful for cancellation, or other conditions)
+@end enumerate
+")
+    (license license:asl2.0)))
-- 
2.36.1