[ion] 52785: [KERNEL32]: New macro, not yet used. This one implements the CreateXxxW APIs (or rather, will).

Author: ion
Date: Sat Jul 23 00:28:33 2011
New Revision: 52785

URL: http://svn.reactos.org/svn/reactos?rev=52785&view=rev
Log:
[KERNEL32]: New macro, not yet used. This one implements the CreateXxxW APIs (or rather, will).

Modified:
    trunk/reactos/dll/win32/kernel32/include/base_x.h

Modified: trunk/reactos/dll/win32/kernel32/include/base_x.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/include/...
==============================================================================
--- trunk/reactos/dll/win32/kernel32/include/base_x.h [iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/include/base_x.h [iso-8859-1] Sat Jul 23 00:28:33 2011
@@ -68,3 +68,51 @@
     if (NT_SUCCESS(Status)) return obj##W(UnicodeCache->Buffer, args);          \
     ConvertAnsiToUnicodeEpilogue

+//
+// This macro (split it up in 3 pieces to allow for intermediary code in between)
+// wraps the usual code path required to create an NT object based on a Unicode
+// (Wide) Win32 object creation API.
+//
+// It makes use of BasepConvertObjectAttributes and allows for a custom access
+// mode to be used, and also sets the correct error codes in case of a collision
+//
+#define CreateNtObjectFromWin32ApiPrologue(sec, name)                           \
+{                                                                               \
+    NTSTATUS Status;                                                            \
+    OBJECT_ATTRIBUTES LocalAttributes;                                          \
+    POBJECT_ATTRIBUTES ObjectAttributes;                                        \
+    HANDLE Handle;                                                              \
+    UNICODE_STRING ObjectName;                                                  \
+    if (name) RtlInitUnicodeString(&ObjectName, name);                          \
+    ObjectAttributes = BasepConvertObjectAttributes(&LocalAttributes,           \
+                                                    sec,                        \
+                                                    name ? &ObjectName : NULL);
+#define CreateNtObjectFromWin32ApiBody(ntobj, access, args...)                  \
+    Status = NtCreate##ntobj(&Handle, access, ObjectAttributes, args);
+#define CreateNtObjectFromWin32ApiEpilogue                                      \
+    if (NT_SUCCESS(Status))                                                     \
+    {                                                                           \
+        if (Status == STATUS_OBJECT_NAME_EXISTS)                                \
+            SetLastError(ERROR_ALREADY_EXISTS);                                 \
+        else                                                                    \
+            SetLastError(ERROR_SUCCESS);                                        \
+        return Handle;                                                          \
+    }                                                                           \
+    SetLastErrorByStatus(Status);                                               \
+    return NULL;                                                                \
+}
+
+//
+// This macro uses the CreateNtObjectFromWin32Api macros from above to create an
+// NT object based on the Win32 API settings.
+//
+// Note that it is hardcoded to always use XXX_ALL_ACCESS permissions, which is
+// the behavior up until Vista. When/if the target moves to Vista, the macro can
+// be improved to support caller-specified access masks, as the underlying macro
+// above does support this.
+//
+#define CreateNtObjectFromWin32Api(obj, ntobj, capsobj, sec, name, args...)     \
+    CreateNtObjectFromWin32ApiPrologue(sec, name);                              \
+    CreateNtObjectFromWin32ApiBody(ntobj, capsobj##_ALL_ACCESS, args);          \
+    CreateNtObjectFromWin32ApiEpilogue
+