From 2480f6bb6794253a67c5706412264ee002e01a85 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Sun, 9 Sep 2018 11:35:39 +0200
Subject: [PATCH] Allow switchToTask to be called within a yield lock.

Enables waking up other tasks from within a yield lock (executed after the yield lock is lifted).
---
 source/vibe/core/core.d | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/vibe/core/core.d b/source/vibe/core/core.d
index 47cb048..d4caf36 100644
--- a/source/vibe/core/core.d
+++ b/source/vibe/core/core.d
@@ -689,7 +689,8 @@ void hibernate(scope void delegate() @safe nothrow on_interrupt = null)
 */
 void switchToTask(Task t)
 @safe nothrow {
-	s_scheduler.switchTo(t);
+	auto defer = TaskFiber.getThis().m_yieldLockCount > 0 ? Yes.defer : No.defer;
+	s_scheduler.switchTo(t, defer);
 }