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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
commit6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch)
treebbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads/sysdeps/arc
parent398a27a5b323956344b4f831d892fed3bd9813c7 (diff)
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence of NPTL/TLS for well supported architectures. There is no reason to use LT.new for ARM/MIPS or other architectures supporting NPTL/TLS. It is not available for noMMU architectures like Blackfin or FR-V. To simplify the live of the few uClibc-ng developers, LT.new is removed and LT.old is renamed to LT. LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/arc')
-rw-r--r--libpthread/linuxthreads/sysdeps/arc/pt-machine.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/arc/pt-machine.h b/libpthread/linuxthreads/sysdeps/arc/pt-machine.h
new file mode 100644
index 000000000..8df1e77e3
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arc/pt-machine.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+#include <features.h>
+
+#ifndef PT_EI
+# define PT_EI __extern_always_inline
+#endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+PT_EI long int
+testandset (int *spinlock)
+{
+ unsigned int old = 1;
+
+ /* Atomically exchange @spinlock with 1 */
+ __asm__ __volatile__(
+ "ex %0, [%1]"
+ : "+r" (old)
+ : "r" (spinlock)
+ : "memory");
+
+ return old;
+
+}
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame.
+ I don't trust register variables, so let's do this the safe way. */
+#define CURRENT_STACK_FRAME \
+__extension__ ({ char *__sp; __asm__ ("mov %0,sp" : "=r" (__sp)); __sp; })
+
+#else
+#error PT_MACHINE already defined
+#endif /* pt-machine.h */