From ae6cedfe56f56a4b805eb563e98f7420eb10487f Mon Sep 17 00:00:00 2001
From: David Zeuthen <david@fubar.dk>
Date: Thu, 21 Jul 2005 19:03:34 +0000
Subject: Patch from Danny Kukawka <danny.kukawka@web.de>: here the new patch
 with a     macro instead of always the same codeblock in so many funtions.

---
 libhal/libhal.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'libhal/libhal.h')

diff --git a/libhal/libhal.h b/libhal/libhal.h
index 11e41bc2..c79f8ec2 100644
--- a/libhal/libhal.h
+++ b/libhal/libhal.h
@@ -35,6 +35,17 @@ extern "C" {
 #endif
 #endif
 
+/** Checks if LibHalContext *ctx == NULL */
+#define LIBHAL_CHECK_LIBHALCONTEXT(_ctx_, _ret_)					\
+	do {									\
+		if (_ctx_ == NULL) {						\
+			fprintf (stderr,					\
+				 "%s %d : LibHalContext *ctx is NULL\n", 	\
+				 __FILE__, __LINE__);				\
+			return _ret_;						\
+		}								\
+	} while(0)
+
 /**
  * @addtogroup LibHal
  *
-- 
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