[PATCH v6 6/7] msvcr100: Add ExternalContextBase::Unblock implementation.

[Piotr Caban]

From: Piotr Caban

---
 dlls/msvcrt/concurrency.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/msvcrt/concurrency.c b/dlls/msvcrt/concurrency.c
index d7520ac308c..d524deb9e2c 100644
--- a/dlls/msvcrt/concurrency.c
+++ b/dlls/msvcrt/concurrency.c
@@ -915,7 +915,11 @@ unsigned int __thiscall ExternalContextBase_GetScheduleGroupId(const ExternalCon
 DEFINE_THISCALL_WRAPPER(ExternalContextBase_Unblock, 4)
 void __thiscall ExternalContextBase_Unblock(ExternalContextBase *this)
 {
-    FIXME("(%p)->() stub\n", this);
+    TRACE("(%p)->()\n", this);
+
+    /* TODO: throw context_unblock_unbalanced if this->blocked goes below -1 */
+    if (InterlockedDecrement(&this->blocked) < 1)
+        RtlWakeAddressSingle(&this->blocked);
 }

DEFINE_THISCALL_WRAPPER(ExternalContextBase_IsSynchronouslyBlocked, 4)