diff options
Diffstat (limited to 'sysdeps/mach/hurd')
| -rw-r--r-- | sysdeps/mach/hurd/i386/tls.h | 21 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/tls.h | 20 |
2 files changed, 21 insertions, 20 deletions
diff --git a/sysdeps/mach/hurd/i386/tls.h b/sysdeps/mach/hurd/i386/tls.h index 057b2613f3..2ac65df921 100644 --- a/sysdeps/mach/hurd/i386/tls.h +++ b/sysdeps/mach/hurd/i386/tls.h @@ -369,6 +369,27 @@ _hurd_tls_new (thread_t child, struct i386_thread_state *state, tcbhead_t *tcb) return err; } +/* Global scope switch support. */ +# define THREAD_GSCOPE_IN_TCB 1 + +# define THREAD_GSCOPE_FLAG_UNUSED 0 +# define THREAD_GSCOPE_FLAG_USED 1 +# define THREAD_GSCOPE_FLAG_WAIT 2 + +# define THREAD_GSCOPE_SET_FLAG() \ + THREAD_SETMEM (THREAD_SELF, gscope_flag, THREAD_GSCOPE_FLAG_USED) + +# define THREAD_GSCOPE_RESET_FLAG() \ + ({ \ + int __flag; \ + asm volatile ("xchgl %0, %%gs:%P1" \ + : "=r" (__flag) \ + : "i" (offsetof (tcbhead_t, gscope_flag)), \ + "0" (THREAD_GSCOPE_FLAG_UNUSED)); \ + if (__flag == THREAD_GSCOPE_FLAG_WAIT) \ + lll_wake (THREAD_SELF->gscope_flag, LLL_PRIVATE); \ + }) + #endif /* !__ASSEMBLER__ */ #endif /* i386/tls.h */ diff --git a/sysdeps/mach/hurd/tls.h b/sysdeps/mach/hurd/tls.h index f83956d3d7..8e66d5ff53 100644 --- a/sysdeps/mach/hurd/tls.h +++ b/sysdeps/mach/hurd/tls.h @@ -52,26 +52,6 @@ # define GET_DTV(descr) \ (((tcbhead_t *) (descr))->dtv) -/* Global scope switch support. */ -#define THREAD_GSCOPE_IN_TCB 0 -#define THREAD_GSCOPE_GLOBAL -#define THREAD_GSCOPE_SET_FLAG() \ - atomic_exchange_and_add_acq (&GL(dl_thread_gscope_count), 1) -#define THREAD_GSCOPE_RESET_FLAG() \ - do \ - if (atomic_exchange_and_add_rel (&GL(dl_thread_gscope_count), -1) == 1) \ - lll_wake (GL(dl_thread_gscope_count), 0); \ - while (0) -#define THREAD_GSCOPE_WAIT() \ - do \ - { \ - int count; \ - atomic_write_barrier (); \ - while ((count = GL(dl_thread_gscope_count))) \ - lll_wait (GL(dl_thread_gscope_count), count, 0); \ - } \ - while (0) - #endif /* !ASSEMBLER */ |