add BLI_alloca.h, missed in previous commit

1 files changed, 46 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_alloca.h b/source/blender/blenlib/BLI_alloca.h
new file mode 100644
index 00000000000..b93f5b7123e
--- /dev/null
+++ b/source/blender/blenlib/BLI_alloca.h
@@ -0,0 +1,46 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BLI_ALLOCA_H__
+
+/** \file BLI_alloca.h
+ *  \ingroup bli
+ *
+ * Defines alloca and utility macro BLI_array_alloca
+ */
+
+/* BLI_array_alloca / alloca */
+#ifdef _MSC_VER
+#  define alloca _alloca
+#endif
+
+#if defined(__MINGW32__)
+#  include <malloc.h>  /* mingw needs for alloca() */
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define BLI_array_alloca(arr, realsize) \
+	(typeof(arr))alloca(sizeof(*arr) * (realsize))
+#else
+#define BLI_array_alloca(arr, realsize) \
+	alloca(sizeof(*arr) * (realsize))
+#endif
+
+#endif /* __BLI_ALLOCA_H__ */