Imported Upstream version 2.20.10upstream/2.20.10

1 files changed, 59 insertions, 0 deletions

diff --git a/src/sna/compiler.h b/src/sna/compiler.h
new file mode 100644
index 000000000..ff80365eb
--- /dev/null
+++ b/src/sna/compiler.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#ifndef _SNA_COMPILER_H_
+#define _SNA_COMPILER_H_
+
+#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
+#define likely(expr) (__builtin_expect (!!(expr), 1))
+#define unlikely(expr) (__builtin_expect (!!(expr), 0))
+#define noinline __attribute__((noinline))
+#define force_inline inline __attribute__((always_inline))
+#define fastcall __attribute__((regparm(3)))
+#define must_check __attribute__((warn_unused_result))
+#define constant __attribute__((const))
+#else
+#define likely(expr) (expr)
+#define unlikely(expr) (expr)
+#define noinline
+#define force_inline
+#define fastcall
+#define must_check
+#define constant
+#endif
+
+#ifdef HAVE_VALGRIND
+#define VG(x) x
+#else
+#define VG(x)
+#endif
+
+#define VG_CLEAR(s) VG(memset(&s, 0, sizeof(s)))
+
+#define COMPILE_TIME_ASSERT(E) ((void)sizeof(char[1 - 2*!(E)]))
+
+#endif /* _SNA_COMPILER_H_ */