diff options
Diffstat (limited to 'nptl/sysdeps/x86_64/tls.h')
| -rw-r--r-- | nptl/sysdeps/x86_64/tls.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/nptl/sysdeps/x86_64/tls.h b/nptl/sysdeps/x86_64/tls.h index 172f44579b..ea89f3b1a2 100644 --- a/nptl/sysdeps/x86_64/tls.h +++ b/nptl/sysdeps/x86_64/tls.h @@ -1,5 +1,5 @@ /* Definition for thread-local data handling. nptl/x86_64 version. - Copyright (C) 2002-2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2002-2007, 2008, 2009 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 @@ -312,6 +312,17 @@ typedef struct __ret; }) +/* Atomic logical and. */ +#define THREAD_ATOMIC_AND(descr, member, val) \ + (void) ({ if (sizeof ((descr)->member) == 4) \ + asm volatile (LOCK_PREFIX "andl %1, %%fs:%P0" \ + :: "i" (offsetof (struct pthread, member)), \ + "ir" (val)); \ + else \ + /* Not necessary for other sizes in the moment. */ \ + abort (); }) + + /* Atomic set bit. */ #define THREAD_ATOMIC_BIT_SET(descr, member, bit) \ (void) ({ if (sizeof ((descr)->member) == 4) \ |