diff options
Diffstat (limited to 'nptl/sysdeps/i386/tls.h')
| -rw-r--r-- | nptl/sysdeps/i386/tls.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/nptl/sysdeps/i386/tls.h b/nptl/sysdeps/i386/tls.h index d5b3797e69..d9044f3fde 100644 --- a/nptl/sysdeps/i386/tls.h +++ b/nptl/sysdeps/i386/tls.h @@ -1,5 +1,5 @@ /* Definition for thread-local data handling. nptl/i386 version. - Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2002,2003,2004,2005,2006,2007 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 @@ -27,6 +27,7 @@ # include <stdint.h> # include <stdlib.h> # include <list.h> +# include <sysdep.h> /* Type for the dtv. */ @@ -51,6 +52,7 @@ typedef struct uintptr_t sysinfo; uintptr_t stack_guard; uintptr_t pointer_guard; + int gscope_flag; } tcbhead_t; # define TLS_MULTIPLE_THREADS_IN_TCB 1 @@ -431,6 +433,35 @@ union user_desc_init = THREAD_GETMEM (THREAD_SELF, header.pointer_guard)) +/* Get and set the global scope generation counter in the TCB head. */ +#define THREAD_GSCOPE_FLAG_UNUSED 0 +#define THREAD_GSCOPE_FLAG_USED 1 +#define THREAD_GSCOPE_FLAG_WAIT 2 +#define THREAD_GSCOPE_RESET_FLAG() \ + do \ + { int __res; \ + asm volatile ("xchg %0, %%gs:%P1" \ + : "=r" (__res) \ + : "i" (offsetof (struct pthread, header.gscope_flag)), \ + "0" (THREAD_GSCOPE_FLAG_UNUSED)); \ + if (__res == THREAD_GSCOPE_FLAG_WAIT) \ + lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1); \ + } \ + while (0) +#define THREAD_GSCOPE_SET_FLAG() \ + THREAD_SETMEM (THREAD_SELF, header.gscope_flag, THREAD_GSCOPE_FLAG_USED) +#ifdef PTR_DEMANGLE +# define THREAD_GSCOPE_WAIT() \ + do { void (*ptr) (void) = GL(dl_wait_lookup_done); \ + PTR_DEMANGLE (ptr); \ + ptr (); \ + } while (0) +#else +# define THREAD_GSCOPE_WAIT() \ + GL(dl_wait_lookup_done) () +#endif + + #endif /* __ASSEMBLER__ */ #endif /* tls.h */ |