diff options
Diffstat (limited to 'libgomp/config/linux/s390/futex.h')
| -rw-r--r-- | libgomp/config/linux/s390/futex.h | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/libgomp/config/linux/s390/futex.h b/libgomp/config/linux/s390/futex.h index 9b3820c0d97..3c4e1fc5d25 100644 --- a/libgomp/config/linux/s390/futex.h +++ b/libgomp/config/linux/s390/futex.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. +/* Copyright (C) 2005, 2008 Free Software Foundation, Inc. Contributed by Jakub Jelinek <jakub@redhat.com>. This file is part of the GNU OpenMP Library (libgomp). @@ -28,10 +28,8 @@ /* Provide target-specific access to the futex system call. */ #include <sys/syscall.h> -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 -static inline void +static inline long sys_futex0 (int *addr, int op, int val) { register long int gpr2 __asm__ ("2"); @@ -49,16 +47,41 @@ sys_futex0 (int *addr, int op, int val) : "i" (SYS_futex), "0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5) : "memory"); + return gpr2; } static inline void futex_wait (int *addr, int val) { - sys_futex0 (addr, FUTEX_WAIT, val); + long err = sys_futex0 (addr, gomp_futex_wait, val); + if (__builtin_expect (err == -ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wait, val); + } } static inline void futex_wake (int *addr, int count) { - sys_futex0 (addr, FUTEX_WAKE, count); + long err = sys_futex0 (addr, gomp_futex_wake, count); + if (__builtin_expect (err == -ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + sys_futex0 (addr, gomp_futex_wake, count); + } +} + +static inline void +cpu_relax (void) +{ + __asm volatile ("" : : : "memory"); +} + +static inline void +atomic_write_barrier (void) +{ + __sync_synchronize (); } |