From 039890a67818211dba8207feab3832b0fcc391d2 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 14 May 2014 15:32:18 -0700 Subject: Move remaining files out of nptl/sysdeps/unix/sysv/linux/x86/. --- sysdeps/unix/sysv/linux/x86/force-elision.h | 31 +++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/x86/force-elision.h (limited to 'sysdeps/unix/sysv/linux/x86/force-elision.h') diff --git a/sysdeps/unix/sysv/linux/x86/force-elision.h b/sysdeps/unix/sysv/linux/x86/force-elision.h new file mode 100644 index 0000000000..945f8867fc --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86/force-elision.h @@ -0,0 +1,31 @@ +/* force-elision.h: Automatic enabling of elision for mutexes + Copyright (C) 2013-2014 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, see + . */ + +/* Check for elision on this lock without upgrading. */ +#define DO_ELISION(m) \ + (__pthread_force_elision \ + && (m->__data.__kind & PTHREAD_MUTEX_NO_ELISION_NP) == 0) \ + +/* Automatically enable elision for existing user lock kinds. */ +#define FORCE_ELISION(m, s) \ + if (__pthread_force_elision \ + && (m->__data.__kind & PTHREAD_MUTEX_ELISION_FLAGS_NP) == 0) \ + { \ + mutex->__data.__kind |= PTHREAD_MUTEX_ELISION_NP; \ + s; \ + } -- cgit 1.4.1