[PATCH v6 7/8] ntdll: Add a reference count to inproc_sync objects.

[Elizabeth Figura]

From: Elizabeth Figura

---
 dlls/ntdll/unix/sync.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/unix/sync.c b/dlls/ntdll/unix/sync.c
index 817bca2a649..f7efd78b4c4 100644
--- a/dlls/ntdll/unix/sync.c
+++ b/dlls/ntdll/unix/sync.c
@@ -309,6 +309,7 @@ static unsigned int validate_open_object_attributes( const OBJECT_ATTRIBUTES *at

struct inproc_sync
 {
+    LONG           refcount;  /* reference count of the sync object */
     int            fd;        /* unix file descriptor */
     unsigned int   access;    /* handle access rights */
     unsigned int   type;      /* enum inproc_sync_type as short to save space */
@@ -316,7 +317,9 @@ struct inproc_sync

static void release_inproc_sync( struct inproc_sync *sync )
 {
-    close( sync->fd );
+    LONG ref = InterlockedDecrement( &sync->refcount );
+    assert( ref >= 0 );
+    if (!ref) close( sync->fd );
 }

static NTSTATUS get_inproc_sync( HANDLE handle, ACCESS_MASK desired_access, struct inproc_sync *sync )
@@ -335,6 +338,7 @@ static NTSTATUS get_inproc_sync( HANDLE handle, ACCESS_MASK desired_access, stru
         if (!(ret = wine_server_call( req )))
         {
             obj_handle_t fd_handle;
+            sync->refcount = 1;
             sync->fd = wine_server_receive_fd( &fd_handle );
             assert( wine_server_ptr_handle(fd_handle) == handle );
             sync->access = reply->access;