diff options
Diffstat (limited to 'bits/libc-tsd.h')
| -rw-r--r-- | bits/libc-tsd.h | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/bits/libc-tsd.h b/bits/libc-tsd.h index 80bd1d3..fc17be1 100644 --- a/bits/libc-tsd.h +++ b/bits/libc-tsd.h @@ -1,5 +1,5 @@ -/* libc-internal interface for thread-specific data. Stub version. - Copyright (C) 1998, 2001 Free Software Foundation, Inc. +/* 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 @@ -17,8 +17,8 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#ifndef _BITS_LIBC_TSD_H -#define _BITS_LIBC_TSD_H 1 +#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. @@ -40,13 +40,22 @@ Some implementations may not provide any enum at all and instead using string pasting in the macros. */ -/* 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. */ +#include <tls.h> -#define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY##_data; -#define __libc_tsd_get(KEY) (__libc_tsd_##KEY##_data) -#define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY##_data = (VALUE)) +/* 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_TLS && HAVE___THREAD +# define __libc_tsd_define(CLASS, KEY) CLASS __thread void *__libc_tsd_##KEY; +#else +# define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY; +#endif + +#define __libc_tsd_get(KEY) (__libc_tsd_##KEY) +#define __libc_tsd_set(KEY, VALUE) (__libc_tsd_##KEY = (VALUE)) #endif /* bits/libc-tsd.h */ |