Libc-498.tar.gz

[apple/libc.git] / i386 / gen / setcontext.c

diff --git a/i386/gen/setcontext.c b/i386/gen/setcontext.c
new file mode 100644 (file)
index 0000000..022a74a
--- /dev/null
+++ b/i386/gen/setcontext.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2007 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#if defined(__i386__)
+
+#define _XOPEN_SOURCE 600L
+
+#include <ucontext.h>
+
+extern int _setcontext(const ucontext_t *);
+
+int
+setcontext(const ucontext_t *uctx)
+{
+       mcontext_t mctx = (mcontext_t)&uctx->__mcontext_data;
+       ucontext_t *_uctx = (ucontext_t *)uctx;
+       if (mctx != _uctx->uc_mcontext)
+               _uctx->uc_mcontext = mctx;
+       return _setcontext(uctx);
+}
+
+#endif /* __i386__ */