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-rw-r--r--gnu/packages/haskell-xyz.scm37
1 files changed, 37 insertions, 0 deletions
diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 8291c7f083..8dc16f685b 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -140,3 +140,40 @@ types.")
reading data types from @code{ByteString} and @code{Text}. It also
includes efficient implementations for common data types.")
(license license:bsd-3)))
+
+(define-public ghc-threads
+ (package
+ (name "ghc-threads")
+ (version "0.5.1.6")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append "https://hackage.haskell.org/package/"
+ "threads/threads-" version ".tar.gz"))
+ (sha256
+ (base32
+ "0bjnjhnq3km6xqk0fn1fgyz5xdw4h6lylbwwbcmkkfzwcz0c76hk"))))
+ (build-system haskell-build-system)
+ (native-inputs
+ `(("ghc-concurrent-extra" ,ghc-concurrent-extra)
+ ("ghc-hunit" ,ghc-hunit)
+ ("ghc-test-framework" ,ghc-test-framework)
+ ("ghc-test-framework-hunit" ,ghc-test-framework-hunit)))
+ (home-page "https://github.com/basvandijk/threads")
+ (synopsis "Fork threads and wait for their result")
+ (description "This package provides functions to fork threads and
+wait for their result, whether it's an exception or a normal value.
+Besides waiting for the termination of a single thread this package also
+provides functions to wait for a group of threads to terminate. This
+package is similar to the @code{threadmanager}, @code{async} and
+@code{spawn} packages. The advantages of this package are:
+
+@itemize
+@item Simpler API.
+@item More efficient in both space and time.
+@item No space-leak when forking a large number of threads.
+@item Correct handling of asynchronous exceptions.
+@item GHC specific functionality like @code{forkOn} and
+@code{forkIOWithUnmask}.
+@end itemize")
+ (license license:bsd-3)))