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authorH.J. Lu <hjl.tools@gmail.com>2012-10-10 07:47:59 -0700
committerH.J. Lu <hjl.tools@gmail.com>2012-10-11 16:40:01 -0700
commit11dd4af68c0ed12a96c7434b812108627c44d407 (patch)
tree4fa846359a1e48dead279703c9cc643cca202d6d /include/ifunc-impl-list.h
parent9a387d1f787f764474943294024b02258f14e80a (diff)
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Framework to test IFUNC implementations on target
Diffstat (limited to 'include/ifunc-impl-list.h')
-rw-r--r--include/ifunc-impl-list.h56
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diff --git a/include/ifunc-impl-list.h b/include/ifunc-impl-list.h
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+/* Internal header file for __libc_supported_implementations.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _IFUNC_IMPL_LIST_H
+#define _IFUNC_IMPL_LIST_H	1
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct libc_ifunc_impl
+{
+  /* The name of function to be tested.  */
+  const char *name;
+  /* The address of function to be tested.  */
+  void (*fn) (void);
+  /* True if this implementation is usable on this machine.  */
+  bool usable;
+};
+
+/* Add an IFUNC implementation, IMPL, for function FUNC, to ARRAY with
+   USABLE at index I and advance I by one.  */
+#define IFUNC_IMPL_ADD(array, i, func, usable, impl) \
+  extern __typeof (func) impl attribute_hidden; \
+  (array)[i++] = (struct libc_ifunc_impl) { #impl, (void (*) (void)) impl, (usable) };
+
+/* Return the number of IFUNC implementations, N, for function FUNC if
+   string NAME matches FUNC.  */
+#define IFUNC_IMPL(n, name, func, ...) \
+  if (strcmp (name, #func) == 0) \
+    { \
+      __VA_ARGS__; \
+      return n; \
+    }
+
+/* Fill ARRAY of MAX elements with IFUNC implementations for function
+   NAME and return the number of valid entries.  */
+extern size_t __libc_ifunc_impl_list (const char *name,
+				      struct libc_ifunc_impl *array,
+				      size_t max);
+
+#endif /* ifunc-impl-list.h */