diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h b/sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h deleted file mode 100644 index f08b5b8..0000000 --- a/sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h +++ /dev/null @@ -1,137 +0,0 @@ -/* Low-level locking access to futex facilities. Linux/i386 version. - Copyright (C) 2014-2015 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, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _LOWLEVELLOCK_FUTEX_H -#define _LOWLEVELLOCK_FUTEX_H 1 - -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -#define FUTEX_CMP_REQUEUE 4 -#define FUTEX_WAKE_OP 5 -#define FUTEX_LOCK_PI 6 -#define FUTEX_UNLOCK_PI 7 -#define FUTEX_TRYLOCK_PI 8 -#define FUTEX_WAIT_BITSET 9 -#define FUTEX_WAKE_BITSET 10 -#define FUTEX_WAIT_REQUEUE_PI 11 -#define FUTEX_CMP_REQUEUE_PI 12 -#define FUTEX_PRIVATE_FLAG 128 -#define FUTEX_CLOCK_REALTIME 256 - -#define FUTEX_BITSET_MATCH_ANY 0xffffffff - -#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) - -/* Values for 'private' parameter of locking macros. Yes, the - definition seems to be backwards. But it is not. The bit will be - reversed before passing to the system call. */ -#define LLL_PRIVATE 0 -#define LLL_SHARED FUTEX_PRIVATE_FLAG - - -#if IS_IN (libc) || IS_IN (rtld) -/* In libc.so or ld.so all futexes are private. */ -# ifdef __ASSUME_PRIVATE_FUTEX -# define __lll_private_flag(fl, private) \ - ((fl) | FUTEX_PRIVATE_FLAG) -# else -# define __lll_private_flag(fl, private) \ - ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) -# endif -#else -# ifdef __ASSUME_PRIVATE_FUTEX -# define __lll_private_flag(fl, private) \ - (((fl) | FUTEX_PRIVATE_FLAG) ^ (private)) -# else -# define __lll_private_flag(fl, private) \ - (__builtin_constant_p (private) \ - ? ((private) == 0 \ - ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) \ - : (fl)) \ - : ({ unsigned int __fl = ((private) ^ FUTEX_PRIVATE_FLAG); \ - asm ("andl %%gs:%P1, %0" : "+r" (__fl) \ - : "i" (offsetof (struct pthread, header.private_futex))); \ - __fl | (fl); })) -# endif -#endif - - -#ifndef __ASSEMBLER__ - -/* To avoid naming conflicts with lowlevellock.h, use a different prefix - here. */ -#ifdef PIC -# define LLLF_EBX_LOAD "xchgl %2, %%ebx\n" -# define LLLF_EBX_REG "D" -#else -# define LLLF_EBX_LOAD -# define LLLF_EBX_REG "b" -#endif - -#ifdef I386_USE_SYSENTER -# ifdef SHARED -# define LLLF_ENTER_KERNEL "call *%%gs:%P6\n\t" -# else -# define LLLF_ENTER_KERNEL "call *_dl_sysinfo\n\t" -# endif -#else -# define LLLF_ENTER_KERNEL "int $0x80\n\t" -#endif - - -#define lll_futex_wait(futex, val, private) \ - lll_futex_timed_wait (futex, val, NULL, private) - - -#define lll_futex_timed_wait(futex, val, timeout, private) \ - ({ \ - int __status; \ - register __typeof (val) _val asm ("edx") = (val); \ - __asm __volatile (LLLF_EBX_LOAD \ - LLLF_ENTER_KERNEL \ - LLLF_EBX_LOAD \ - : "=a" (__status) \ - : "0" (SYS_futex), LLLF_EBX_REG (futex), "S" (timeout), \ - "c" (__lll_private_flag (FUTEX_WAIT, private)), \ - "d" (_val), "i" (offsetof (tcbhead_t, sysinfo)) \ - : "memory"); \ - __status; \ - }) - - -#define lll_futex_wake(futex, nr, private) \ - ({ \ - int __status; \ - register __typeof (nr) _nr asm ("edx") = (nr); \ - LIBC_PROBE (lll_futex_wake, 3, futex, nr, private); \ - __asm __volatile (LLLF_EBX_LOAD \ - LLLF_ENTER_KERNEL \ - LLLF_EBX_LOAD \ - : "=a" (__status) \ - : "0" (SYS_futex), LLLF_EBX_REG (futex), \ - "c" (__lll_private_flag (FUTEX_WAKE, private)), \ - "d" (_nr), \ - "i" (0) /* phony, to align next arg's number */, \ - "i" (offsetof (tcbhead_t, sysinfo))); \ - __status; \ - }) - - -#endif /* !__ASSEMBLER__ */ - -#endif /* lowlevellock-futex.h */ |