1 files changed, 84 insertions, 0 deletions
diff --git a/gpio/samples/simdevice/common.h b/gpio/samples/simdevice/common.h
new file mode 100644
index 00000000..315044c8
--- /dev/null
+++ b/gpio/samples/simdevice/common.h
@@ -0,0 +1,84 @@
+/*++
+
+Copyright (c) Microsoft Corporation.  All rights reserved.
+
+    THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
+    KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
+    PURPOSE.
+
+Module Name:
+
+    common.h
+
+Abstract:
+
+    Header file that provide some utility functionalities to the sample device driver
+
+Environment:
+
+    Kernel mode
+
+--*/
+
+#pragma once
+
+#include <ntddk.h>
+#pragma warning(disable:4201)  // disable nameless struct/union warnings
+#include <wdf.h>
+#pragma warning(default:4201)
+
+#define NTSTRSAFE_LIB
+#include <ntstrsafe.h>
+
+#ifndef MAX_USHORT
+#define MAX_USHORT ((USHORT)-1)
+#endif
+
+#ifndef MAX_ULONG
+#define MAX_ULONG ((ULONG)-1)
+#endif
+
+#ifndef MAX_ULONG64
+#define MAX_ULONG64 ((ULONG64)-1)
+#endif
+
+//
+// Useful macros for setting and checking flags.
+//
+
+#define SET_FLAGS(_x, _f)          ((_x) |= (_f))
+#define CLEAR_FLAGS(_x, _f)        ((_x) &= ~(_f))
+#define CLEAR_OTHER_FLAGS(_x, _f)  ((_x) &= (_f))
+#define CHECK_FLAG(_x, _f)         ((_x) & (_f))
+
+//
+// Macros for rounding up or down.
+//
+
+#define ROUND_DOWN(_x, _alignment) \
+    ((_alignment == 1) ? (_x) : (((_x) / (_alignment)) * (_alignment)))
+
+#define ROUND_UP(_x, _alignment) \
+    ROUND_DOWN((_x) + (_alignment) - 1, (_alignment))
+
+//
+// Macros for find minimum and maximum of two integers.
+//
+
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#define MAX(a,b) (((a) < (b)) ? (b) : (a))
+
+//
+// Define macros to allow easy pointer arithmetic.
+//
+
+#define Add2Ptr(_Ptr, _Value) ((PVOID)((PUCHAR)(_Ptr) + (_Value)))
+#define PtrOffset(_Base, _Ptr) ((ULONG_PTR)(_Ptr) - (ULONG_PTR)(_Base))
+
+// 4127 -- Conditional Expression is Constant warning
+#define WHILE(constant) \
+__pragma(warning(disable: 4127)) while(constant) __pragma(warning(default: 4127))
+
+#define FIELD_OFFSET_AND_SIZE(t, f) \
+    (FIELD_OFFSET(t, f) + FIELD_SIZE(t, f))
+\ No newline at end of file