From e32887d8dfb32dc7e9cc2f6313f4c86170c7f17c Mon Sep 17 00:00:00 2001
From: Andrei Alexandrescu <andrei@erdani.com>
Date: Fri, 22 May 2015 12:21:38 -0700
Subject: [PATCH] Workaround for https://issues.dlang.org/show_bug.cgi?id=14617

---
 std/experimental/allocator/region.d | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/std/experimental/allocator/region.d b/std/experimental/allocator/region.d
index 9017c1fcc..30aa189e6 100644
--- a/std/experimental/allocator/region.d
+++ b/std/experimental/allocator/region.d
@@ -498,6 +498,21 @@ version(Posix) struct SbrkRegion(uint minAlign = platformAlignment)
     import core.sys.posix.pthread;
     static shared pthread_mutex_t sbrkMutex = PTHREAD_MUTEX_INITIALIZER;
 
+    // workaround for https://issues.dlang.org/show_bug.cgi?id=14617
+    version(OSX)
+    {
+        shared static this()
+        {
+            pthread_mutex_init(cast(pthread_mutex_t*) &sbrkMutex, null) == 0
+                || assert(0);
+        }
+        shared static ~this()
+        {
+            pthread_mutex_destroy(cast(pthread_mutex_t*) &sbrkMutex) == 0
+                || assert(0);
+        }
+    }
+
     static assert(minAlign.isGoodStaticAlignment);
     static assert(size_t.sizeof == (void*).sizeof);
     private shared void* _brkInitial, _brkCurrent;