From b17d80b12f30adecf0eb60fc8e9025b4bbb0980f Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 13 Jan 2004 09:36:22 +0000 Subject: * sysdeps/alpha/Makefile: New file. * sysdeps/alpha/tcb-offsets.sym: New file. * sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P): Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version. * sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based on powerpc version. --- sysdeps/alpha/nptl/Makefile | 21 ++++ sysdeps/alpha/nptl/tcb-offsets.sym | 12 ++ sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h | 138 ++++++++++----------- sysdeps/unix/sysv/linux/alpha/nptl/sysdep-cancel.h | 32 ++--- 4 files changed, 114 insertions(+), 89 deletions(-) create mode 100644 sysdeps/alpha/nptl/Makefile create mode 100644 sysdeps/alpha/nptl/tcb-offsets.sym diff --git a/sysdeps/alpha/nptl/Makefile b/sysdeps/alpha/nptl/Makefile new file mode 100644 index 0000000000..88c106bbbf --- /dev/null +++ b/sysdeps/alpha/nptl/Makefile @@ -0,0 +1,21 @@ +# Copyright (C) 2003 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, write to the Free +# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +# 02111-1307 USA. + +ifeq ($(subdir),csu) +gen-as-const-headers += tcb-offsets.sym +endif diff --git a/sysdeps/alpha/nptl/tcb-offsets.sym b/sysdeps/alpha/nptl/tcb-offsets.sym new file mode 100644 index 0000000000..3f6433d5e9 --- /dev/null +++ b/sysdeps/alpha/nptl/tcb-offsets.sym @@ -0,0 +1,12 @@ +#include +#include + +-- + +-- Abuse tls.h macros to derive offsets relative to the thread register. +# define __builtin_thread_pointer() ((void *) 0) +# define thread_offsetof(mem) ((void *) &THREAD_SELF->mem - (void *) 0) + +#if TLS_MULTIPLE_THREADS_IN_TCB +MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads) +#endif diff --git a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h b/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h index cc054f9ef3..9d125e0d6d 100644 --- a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h +++ b/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h @@ -23,6 +23,7 @@ #include #include #include +#include #define __NR_futex 394 @@ -70,79 +71,68 @@ INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \ }) -/* Set *futex to 1 if it is 0, atomically. Returns the old value */ -#define __lll_trylock(futex) \ - ({ int __oldval, __temp; \ - __asm __volatile ( \ - "1: ldl_l %[__oldval], %[__mem]\n" \ - " lda %[__temp], 1\n" \ - " bne %[__oldval], 2f\n" \ - " stl_c %[__temp], %[__mem]\n" \ - " beq %[__temp], 1b\n" \ - __MB \ - "2:" \ - : [__oldval] "=&r" (__oldval), \ - [__temp] "=&r" (__temp) \ - : [__mem] "m" (*(futex)) \ - : "memory"); \ - __oldval; \ - }) -#define lll_mutex_trylock(lock) __lll_trylock (&(lock)) +static inline int __attribute__((always_inline)) +__lll_mutex_trylock(int *futex) +{ + return atomic_compare_and_exchange_val_acq (futex, 1, 0) != 0; +} +#define lll_mutex_trylock(lock) __lll_mutex_trylock (&(lock)) -extern void __lll_lock_wait (int *futex, int val) attribute_hidden; +extern void __lll_lock_wait (int *futex) attribute_hidden; -#define lll_mutex_lock(lock) \ - (void) ({ \ - int *__futex = &(lock); \ - int __val = atomic_exchange_and_add (__futex, 1); \ - atomic_full_barrier(); \ - if (__builtin_expect (__val != 0, 0)) \ - __lll_lock_wait (__futex, __val); \ - }) +static inline void __attribute__((always_inline)) +__lll_mutex_lock(int *futex) +{ + if (atomic_compare_and_exchange_bool_acq (futex, 1, 0) != 0) + __lll_lock_wait (futex); +} +#define lll_mutex_lock(futex) __lll_mutex_lock (&(futex)) -#define lll_mutex_cond_lock(lock) \ - (void) ({ \ - int *__futex = &(lock); \ - int __val = atomic_exchange_and_add (__futex, 2); \ - atomic_full_barrier(); \ - if (__builtin_expect (__val != 0, 0)) \ - /* Note, the val + 1 is kind of ugly here. __lll_lock_wait will \ - add 1 again. But we added 2 to the futex value so this is the \ - right value which will be passed to the kernel. */ \ - __lll_lock_wait (__futex, __val + 1); \ - }) -extern int __lll_timedlock_wait - (int *futex, int val, const struct timespec *) attribute_hidden; +static inline void __attribute__ ((always_inline)) +__lll_mutex_cond_lock (int *futex) +{ + if (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0) + __lll_lock_wait (futex); +} +#define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex)) -#define lll_mutex_timedlock(lock, abstime) \ - ({ int *__futex = &(lock); \ - int __val = atomic_exchange_and_add (__futex, 1); \ - atomic_full_barrier(); \ - if (__builtin_expect (__val != 0, 0)) \ - __val = __lll_timedlock_wait (__futex, __val, (abstime)); \ - __val; \ - }) -#define lll_mutex_unlock(lock) \ - ((void) ({ \ - int *__futex = &(lock), __val; \ - atomic_write_barrier(); \ - __val = atomic_exchange_rel (__futex, 0); \ - if (__builtin_expect (__val > 1, 0)) \ - lll_futex_wake (__futex, 1); \ - })) - -#define lll_mutex_unlock_force(lock) \ - ((void) ({ \ - int *__futex = &(lock); \ - atomic_write_barrier(); \ - *__futex = 0; \ - atomic_full_barrier(); \ - lll_futex_wake (__futex, 1); \ - })) +extern int __lll_timedlock_wait (int *futex, const struct timespec *) + attribute_hidden; + +static inline int __attribute__ ((always_inline)) +__lll_mutex_timedlock (int *futex, const struct timespec *abstime) +{ + int result = 0; + if (atomic_compare_and_exchange_bool_acq (futex, 1, 0) != 0) + result = __lll_timedlock_wait (futex, abstime); + return result; +} +#define lll_mutex_timedlock(futex, abstime) \ + __lll_mutex_timedlock (&(futex), abstime) + + +static inline void __attribute__ ((always_inline)) +__lll_mutex_unlock (int *futex) +{ + int val = atomic_exchange_rel (futex, 0); + if (__builtin_expect (val > 1, 0)) + lll_futex_wake (futex, 1); +} +#define lll_mutex_unlock(futex) __lll_mutex_unlock(&(futex)) + + +static inline void __attribute__ ((always_inline)) +__lll_mutex_unlock_force (int *futex) +{ + (void) atomic_exchange_rel (futex, 0); + lll_futex_wake (futex, 1); +} +#define lll_mutex_unlock_force(futex) __lll_mutex_unlock_force(&(futex)) + #define lll_mutex_islocked(futex) \ (futex != 0) @@ -175,21 +165,21 @@ extern int lll_unlock_wake_cb (int *__futex) attribute_hidden; thread ID while the clone is running and is reset to zero afterwards. */ #define lll_wait_tid(tid) \ - do { \ - __typeof (tid) __tid; \ - while ((__tid = (tid)) != 0) \ - lll_futex_wait (&(tid), __tid); \ + do { \ + __typeof (tid) __tid; \ + while ((__tid = (tid)) != 0) \ + lll_futex_wait (&(tid), __tid); \ } while (0) extern int __lll_timedwait_tid (int *, const struct timespec *) attribute_hidden; #define lll_timedwait_tid(tid, abstime) \ - ({ \ - int __res = 0; \ - if ((tid) != 0) \ - __res = __lll_timedwait_tid (&(tid), (abstime)); \ - __res; \ + ({ \ + int __res = 0; \ + if ((tid) != 0) \ + __res = __lll_timedwait_tid (&(tid), (abstime)); \ + __res; \ }) diff --git a/sysdeps/unix/sysv/linux/alpha/nptl/sysdep-cancel.h b/sysdeps/unix/sysv/linux/alpha/nptl/sysdep-cancel.h index 1b27e27db0..3b08b22c1a 100644 --- a/sysdeps/unix/sysv/linux/alpha/nptl/sysdep-cancel.h +++ b/sysdeps/unix/sysv/linux/alpha/nptl/sysdep-cancel.h @@ -132,26 +132,28 @@ __LABEL($syscall_error) \ # define CDISABLE jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp) # endif -# if defined IS_IN_libpthread || !defined NOT_IN_libc -# ifndef __ASSEMBLER__ +#endif + +#if defined IS_IN_libpthread || !defined NOT_IN_libc +# ifndef __ASSEMBLER__ extern int __local_multiple_threads attribute_hidden; -# define SINGLE_THREAD_P \ +# define SINGLE_THREAD_P \ __builtin_expect (__local_multiple_threads == 0, 1) -# elif defined(PIC) -# define SINGLE_THREAD_P(reg) ldl reg, __local_multiple_threads(gp) !gprel -# else -# define SINGLE_THREAD_P(reg) \ +# elif defined(PIC) +# define SINGLE_THREAD_P(reg) ldl reg, __local_multiple_threads(gp) !gprel +# else +# define SINGLE_THREAD_P(reg) \ ldah reg, __local_multiple_threads(gp) !gprelhigh; \ ldl reg, __local_multiple_threads(reg) !gprellow -# endif -# else -# ifndef __ASSEMBLER__ -# define SINGLE_THREAD_P \ +# endif +#else +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ header.multiple_threads) == 0, 1) -# else -# error Not done -# endif +# else +# define SINGLE_THREAD_P(reg) \ + call_pal PAL_rduniq; \ + ldl reg, MULTIPLE_THREADS_OFFSET($0) # endif - #endif -- cgit v1.2.3