diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/generic/lowlevellock.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/generic/lowlevellock.h | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/libpthread/nptl/sysdeps/generic/lowlevellock.h b/libpthread/nptl/sysdeps/generic/lowlevellock.h index 7f95daada..0600e1794 100644 --- a/libpthread/nptl/sysdeps/generic/lowlevellock.h +++ b/libpthread/nptl/sysdeps/generic/lowlevellock.h @@ -1,4 +1,5 @@ -/* Copyright (C) 2002 Free Software Foundation, Inc. +/* Low level locking macros used in NPTL implementation. Stub version. + Copyright (C) 2002, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -20,16 +21,6 @@ #include <atomic.h> -/* Implement generic mutex. Basic futex syscall support is required: - - lll_futex_wait(futex, value) - call sys_futex with FUTEX_WAIT - and third parameter VALUE - - lll_futex_wake(futex, value) - call sys_futex with FUTEX_WAKE - and third parameter VALUE -*/ - - /* Mutex lock counter: bit 31 clear means unlocked; bit 31 set means locked. @@ -65,7 +56,9 @@ __generic_mutex_lock (int *mutex) if (v >= 0) continue; - lll_futex_wait (mutex, v); + lll_futex_wait (mutex, v, + // XYZ check mutex flag + LLL_SHARED); } } @@ -81,7 +74,9 @@ __generic_mutex_unlock (int *mutex) /* There are other threads waiting for this mutex, wake one of them up. */ - lll_futex_wake (mutex, 1); + lll_futex_wake (mutex, 1, + // XYZ check mutex flag + LLL_SHARED); } |