Merge PR #6444: [lib] Split auxiliary libraries into Coq-specific and general.

1 files changed, 26 insertions, 0 deletions

diff --git a/clib/cThread.mli b/clib/cThread.mli
new file mode 100644
index 0000000000..66f039bb52
--- /dev/null
+++ b/clib/cThread.mli
@@ -0,0 +1,26 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(* As of OCaml 4.01.0 input_value and input do not quite work well
+ * with threads.  The symptom is the following.  Two threads, each
+ * of them blocked on a read (on different channels).  One is not
+ * woken up even if data is available.  When the other one gets data
+ * then the stuck one is eventually unblocked too.  Unix.select with
+ * an unbounded wait has the same problem. *)
+
+(* Use only the following functions on the channel *)
+type thread_ic
+val prepare_in_channel_for_thread_friendly_io : in_channel -> thread_ic
+
+val thread_friendly_input_value : thread_ic -> 'a
+val thread_friendly_read :
+  thread_ic -> Bytes.t -> off:int -> len:int -> int
+val thread_friendly_really_read :
+  thread_ic -> Bytes.t -> off:int -> len:int -> unit
+val thread_friendly_really_read_line : thread_ic -> string
+