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authorAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:26:24 -0700
committerAustin Foxley <austinf@cetoncorp.com>2009-10-17 12:26:24 -0700
commitc68d0fa2d88fc2134a38d99e7e944828384a7671 (patch)
tree6596943bd1c77f18d6e49d4153ddd3f3d67b49f5 /libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h
parent9a03e98a3b418f33c347a6023e9320f3a42cb9e4 (diff)
libpthread/nptl: core of the "Native Posix Threading Library" for uClibc
targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h')
-rw-r--r--libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h b/libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h
new file mode 100644
index 000000000..d39382952
--- /dev/null
+++ b/libpthread/nptl/sysdeps/pthread/bits/libc-tsd.h
@@ -0,0 +1,69 @@
+/* libc-internal interface for thread-specific data. Stub or TLS version.
+ Copyright (C) 1998,2001,02 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _GENERIC_BITS_LIBC_TSD_H
+#define _GENERIC_BITS_LIBC_TSD_H 1
+
+/* This file defines the following macros for accessing a small fixed
+ set of thread-specific `void *' data used only internally by libc.
+
+ __libc_tsd_define(CLASS, KEY) -- Define or declare a `void *' datum
+ for KEY. CLASS can be `static' for
+ keys used in only one source file,
+ empty for global definitions, or
+ `extern' for global declarations.
+ __libc_tsd_address(KEY) -- Return the `void **' pointing to
+ the current thread's datum for KEY.
+ __libc_tsd_get(KEY) -- Return the `void *' datum for KEY.
+ __libc_tsd_set(KEY, VALUE) -- Set the datum for KEY to VALUE.
+
+ The set of available KEY's will usually be provided as an enum,
+ and contains (at least):
+ _LIBC_TSD_KEY_MALLOC
+ _LIBC_TSD_KEY_DL_ERROR
+ _LIBC_TSD_KEY_RPC_VARS
+ All uses must be the literal _LIBC_TSD_* name in the __libc_tsd_* macros.
+ Some implementations may not provide any enum at all and instead
+ using string pasting in the macros. */
+
+#include <tls.h>
+
+/* When full support for __thread variables is available, this interface is
+ just a trivial wrapper for it. Without TLS, this is the generic/stub
+ implementation for wholly single-threaded systems.
+
+ We don't define an enum for the possible key values, because the KEYs
+ translate directly into variables by macro magic. */
+
+#if USE___THREAD
+# define __libc_tsd_define(CLASS, KEY) \
+ CLASS __thread void *__libc_tsd_##KEY attribute_tls_model_ie;
+
+# define __libc_tsd_address(KEY) (&__libc_tsd_##KEY)
+# define __libc_tsd_get(KEY) (__libc_tsd_##KEY)
+# define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY = (VALUE))
+#else
+# define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY##_data;
+
+# define __libc_tsd_address(KEY) (&__libc_tsd_##KEY##_data)
+# define __libc_tsd_get(KEY) (__libc_tsd_##KEY##_data)
+# define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY##_data = (VALUE))
+#endif
+
+#endif /* bits/libc-tsd.h */