Alexandre Julliard : ntdll: Avoid importing RtlEnterCriticalSection/RtlLeaveCriticalSection from the Unix side.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1d3e3a1c8d08c75e88734ec00b5a2b412e8d6ca3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=1d3e3a1c8d08c75e88734ec00...

Author: Alexandre Julliard 
Date:   Wed Aug  5 15:28:23 2020 +0200

ntdll: Avoid importing RtlEnterCriticalSection/RtlLeaveCriticalSection from the Unix side.

Signed-off-by: Alexandre Julliard

---

dlls/ntdll/unix/sync.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/dlls/ntdll/unix/sync.c b/dlls/ntdll/unix/sync.c
index e7e13a6c7e..23dca9c61b 100644
--- a/dlls/ntdll/unix/sync.c
+++ b/dlls/ntdll/unix/sync.c
@@ -2522,9 +2522,20 @@ NTSTATUS CDECL fast_RtlSleepConditionVariableCS( RTL_CONDITION_VARIABLE *variabl

val = *futex;

-    RtlLeaveCriticalSection( cs );
-    status = wait_cv( futex, val, timeout );
-    RtlEnterCriticalSection( cs );
+    if (cs->RecursionCount == 1)
+    {
+        /* FIXME: simplified version of RtlLeaveCriticalSection/RtlEnterCriticalSection to avoid imports */
+        cs->RecursionCount = 0;
+        cs->OwningThread   = 0;
+        if (InterlockedDecrement( &cs->LockCount ) >= 0) fast_RtlpUnWaitCriticalSection( cs );
+
+        status = wait_cv( futex, val, timeout );
+
+        if (InterlockedIncrement( &cs->LockCount )) fast_RtlpWaitForCriticalSection( cs, INT_MAX );
+        cs->OwningThread   = ULongToHandle( GetCurrentThreadId() );
+        cs->RecursionCount = 1;
+    }
+    else status = wait_cv( futex, val, timeout );
     return status;
 }