From 35cca893f5d34e07a94e1e517e138e12f6711443 Mon Sep 17 00:00:00 2001
From: Jeroen Leenarts <jeroen.leenarts@gmail.com>
Date: Sun, 5 Aug 2018 22:59:34 +0200
Subject: [PATCH] Call read packets on background queue to allow waiting for
 signal.

---
 WireGuardNetworkExtension/WireGuardGoWrapper.m | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/WireGuardNetworkExtension/WireGuardGoWrapper.m b/WireGuardNetworkExtension/WireGuardGoWrapper.m
index 8259b1a..cda62b4 100644
--- a/WireGuardNetworkExtension/WireGuardGoWrapper.m
+++ b/WireGuardNetworkExtension/WireGuardGoWrapper.m
@@ -85,12 +85,13 @@ static ssize_t do_read(const void *ctx, const unsigned char *buf, size_t len)
 
     if (wrapper.packets.count == 0) {
 
-        [wrapper.packetFlow readPacketsWithCompletionHandler:^(NSArray<NSData *> * _Nonnull packets, NSArray<NSNumber *> * _Nonnull protocols) {
-            [wrapper.packets addObjectsFromArray:packets];
-            [wrapper.protocols addObjectsFromArray:protocols];
-            // TODO make sure that the completion handler and the do_read are not performed on the same thread.
-            [wrapper.condition signal];
-        }];
+        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
+            [wrapper.packetFlow readPacketsWithCompletionHandler:^(NSArray<NSData *> * _Nonnull packets, NSArray<NSNumber *> * _Nonnull protocols) {
+                [wrapper.packets addObjectsFromArray:packets];
+                [wrapper.protocols addObjectsFromArray:protocols];
+                [wrapper.condition signal];
+            }];
+        });
         [wrapper.condition wait];
     }