diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S b/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S index f64c7217c9..f1795131f8 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S +++ b/nptl/sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* Copyright (C) 2003, 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 @@ -20,11 +20,13 @@ #include <lowlevelrwlock.h> #include <pthread-errnos.h> #include <tcb-offsets.h> +#include <kernel-features.h> #include "lowlevel-atomic.h" #define SYS_futex 240 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +#define FUTEX_PRIVATE_FLAG 128 .text @@ -55,7 +57,8 @@ __pthread_rwlock_rdlock: mov.l @(WRITERS_QUEUED,r8), r0 tst r0, r0 bt 5f - mov.l @(FLAGS,r8), r0 + mov #FLAGS, r0 + mov.b @(r0,r8), r0 tst r0, r0 bt 5f 3: @@ -75,9 +78,28 @@ __pthread_rwlock_rdlock: tst r2, r2 bf 10f 11: +#if __ASSUME_PRIVATE_FUTEX + mov #PSHARED, r0 + mov.b @(r0,r8), r5 + mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r0 + xor r0, r5 + extu.b r5, r5 +#else + mov #PSHARED, r0 + mov.b @(r0,r8), r5 + extu.b r5, r5 +# if FUTEX_WAIT != 0 + mov #FUTEX_WAIT, r0 + or r0, r5 +# endif + stc gbr, r1 + mov.w .Lpfoff, r2 + add r2, r1 + mov.l @r1, r0 + xor r0, r5 +#endif mov r8, r4 add #READERS_WAKEUP, r4 - mov #FUTEX_WAIT, r5 mov r9, r6 mov #0, r7 mov #SYS_futex, r3 @@ -124,6 +146,11 @@ __pthread_rwlock_rdlock: rts mov r3, r0 +#if !__ASSUME_PRIVATE_FUTEX +.Lpfoff: + .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE +#endif + 1: mov r8, r5 #if MUTEX != 0 |