ntdll: Implement NtQuerySemaphore().

dlls/ntdll/unix/esync.c

@@ -418,6 +418,25 @@ NTSTATUS esync_release_semaphore( HANDLE handle, ULONG count, ULONG *prev )
     return STATUS_SUCCESS;
 }
 
+NTSTATUS esync_query_semaphore( HANDLE handle, void *info, ULONG *ret_len )
+{
+    struct esync *obj;
+    struct semaphore *semaphore;
+    SEMAPHORE_BASIC_INFORMATION *out = info;
+    NTSTATUS ret;
+
+    TRACE("handle %p, info %p, ret_len %p.\n", handle, info, ret_len);
+
+    if ((ret = get_object( handle, &obj ))) return ret;
+    semaphore = obj->shm;
+
+    out->CurrentCount = semaphore->count;
+    out->MaximumCount = semaphore->max;
+    if (ret_len) *ret_len = sizeof(*out);
+
+    return STATUS_SUCCESS;
+}
+
 NTSTATUS esync_create_event( HANDLE *handle, ACCESS_MASK access,
     const OBJECT_ATTRIBUTES *attr, EVENT_TYPE event_type, BOOLEAN initial )
 {

dlls/ntdll/unix/esync.h

@@ -26,6 +26,7 @@ extern NTSTATUS esync_create_semaphore(HANDLE *handle, ACCESS_MASK access,
     const OBJECT_ATTRIBUTES *attr, LONG initial, LONG max) DECLSPEC_HIDDEN;
 extern NTSTATUS esync_open_semaphore( HANDLE *handle, ACCESS_MASK access,
     const OBJECT_ATTRIBUTES *attr ) DECLSPEC_HIDDEN;
+extern NTSTATUS esync_query_semaphore( HANDLE handle, void *info, ULONG *ret_len ) DECLSPEC_HIDDEN;
 extern NTSTATUS esync_release_semaphore( HANDLE handle, ULONG count, ULONG *prev ) DECLSPEC_HIDDEN;
 
 extern NTSTATUS esync_create_event( HANDLE *handle, ACCESS_MASK access,

dlls/ntdll/unix/sync.c

@@ -341,6 +341,9 @@ NTSTATUS WINAPI NtQuerySemaphore( HANDLE handle, SEMAPHORE_INFORMATION_CLASS cla
 
     if (len != sizeof(SEMAPHORE_BASIC_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
 
+    if (do_esync())
+        return esync_query_semaphore( handle, info, ret_len );
+
     SERVER_START_REQ( query_semaphore )
     {
         req->handle = wine_server_obj_handle( handle );