lib/util Move sys_memalign into lib/util/system.c

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/util/system.c b/lib/util/system.c
index 17c0553102..1e80f1a88a 100644
--- a/lib/util/system.c
+++ b/lib/util/system.c
@@ -22,6 +22,8 @@
 #include "system/network.h"
 #include "system/filesys.h"
 
+#undef malloc
+
 /*
    The idea is that this file will eventually have wrappers around all
    important system calls in samba. The aims are:
@@ -37,6 +39,42 @@
      expansions/etc make sense to the OS should be acceptable to Samba.
 */
 
+/*******************************************************************
+ A wrapper for memalign
+********************************************************************/
+
+void *sys_memalign( size_t align, size_t size )
+{
+#if defined(HAVE_POSIX_MEMALIGN)
+	void *p = NULL;
+	int ret = posix_memalign( &p, align, size );
+	if ( ret == 0 )
+		return p;
+
+	return NULL;
+#elif defined(HAVE_MEMALIGN)
+	return memalign( align, size );
+#else
+	/* On *BSD systems memaligns doesn't exist, but memory will
+	 * be aligned on allocations of > pagesize. */
+#if defined(SYSCONF_SC_PAGESIZE)
+	size_t pagesize = (size_t)sysconf(_SC_PAGESIZE);
+#elif defined(HAVE_GETPAGESIZE)
+	size_t pagesize = (size_t)getpagesize();
+#else
+	size_t pagesize = (size_t)-1;
+#endif
+	if (pagesize == (size_t)-1) {
+		DEBUG(0,("memalign functionalaity not available on this platform!\n"));
+		return NULL;
+	}
+	if (size < pagesize) {
+		size = pagesize;
+	}
+	return malloc(size);
+#endif
+}
+
 /**************************************************************************
 A wrapper for gethostbyname() that tries avoids looking up hostnames 
 in the root domain, which can cause dial-on-demand links to come up for no
@@ -189,3 +227,4 @@ _PUBLIC_ int sys_connect(int fd, const struct sockaddr * addr)
 
 	return connect(fd, addr, salen);
 }
+