r3882 - trunk/birnet

[stw svn gnome org]

Author: stw
Date: 2006-09-16 03:59:25 -0400 (Sat, 16 Sep 2006)
New Revision: 3882

Modified:
   trunk/birnet/ChangeLog
   trunk/birnet/birnetutils.c
   trunk/birnet/birnetutils.h
Log:
Sat Sep 16 09:20:49 2006  Stefan Westerfeld  <stefan space twc de>

	* birnetutils.[hc]: Added birnet_malloc_aligned(), which allocates
	memory with an arbitary alignment. The caller is responsible for
	for keeping track of and freeing the unaligned memory.


Modified: trunk/birnet/ChangeLog
===================================================================
--- trunk/birnet/ChangeLog	2006-09-11 23:42:06 UTC (rev 3881)
+++ trunk/birnet/ChangeLog	2006-09-16 07:59:25 UTC (rev 3882)
@@ -1,3 +1,9 @@
+Sat Sep 16 09:20:49 2006  Stefan Westerfeld  <stefan space twc de>
+
+	* birnetutils.[hc]: Added birnet_malloc_aligned(), which allocates
+	memory with an arbitary alignment. The caller is responsible for
+	for keeping track of and freeing the unaligned memory.
+
 Tue Sep 12 01:41:18 2006  Tim Janik  <timj gtk org>
 
 	* birnetutilsxx.cc (rip_data): fix missing updates of 'last' pointer

Modified: trunk/birnet/birnetutils.c
===================================================================
--- trunk/birnet/birnetutils.c	2006-09-11 23:42:06 UTC (rev 3881)
+++ trunk/birnet/birnetutils.c	2006-09-16 07:59:25 UTC (rev 3882)
@@ -282,6 +282,21 @@
   wmemset ((wchar_t*) mem, filler, length);
 }
 
+/* --- memory utils --- */
+void*
+birnet_malloc_aligned (gsize	  total_size,
+		       gsize	  alignment,
+		       guint8	**free_pointer)
+{
+  *free_pointer = g_malloc (total_size + alignment - 1);
+  
+  uint8 *aligned_mem = *free_pointer;
+  if ((ptrdiff_t) aligned_mem % alignment)
+    aligned_mem += alignment - (ptrdiff_t) free_pointer % alignment;
+
+  return aligned_mem;
+}
+
 /* --- file testing --- */
 static int
 errno_check_file (const char *file_name,

Modified: trunk/birnet/birnetutils.h
===================================================================
--- trunk/birnet/birnetutils.h	2006-09-11 23:42:06 UTC (rev 3881)
+++ trunk/birnet/birnetutils.h	2006-09-16 07:59:25 UTC (rev 3882)
@@ -42,6 +42,10 @@
 void birnet_memset4		      (guint32              *mem,
 				       guint32               filler,
 				       guint                 length);
+/* --- memory utils --- */
+void* birnet_malloc_aligned           (gsize                 total_size,
+                                       gsize                 alignment,
+				       guint8             **free_pointer);
 /* --- file testing --- */
 bool birnet_file_check                (const gchar *file,	/* returns errno */
 				       const gchar *mode);