diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S new file mode 100644 index 000000000..0948da698 --- /dev/null +++ b/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S @@ -0,0 +1,46 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@twiddle.net>, 2003. + + 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. */ + + +#define _ERRNO_H 1 +#include <bits/errno.h> + + .text + .align 4 + + .globl pthread_spin_trylock + .ent pthread_spin_trylock +pthread_spin_trylock: + .frame $sp, 0, $26, 0 + .prologue 0 + +0: ldl_l $1, 0($16) + lda $2, 1 + lda $0, EBUSY + bne $1, 1f + + stl_c $2, 0($16) + beq $2, 2f + mb + lda $0, 0 + +1: ret +2: br 0b + + .end pthread_spin_trylock |