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author | Alexander Larsson <alexl@redhat.com> | 2010-01-28 14:44:31 +0100 |
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committer | Alexander Larsson <alexl@redhat.com> | 2010-02-04 16:43:24 +0100 |
commit | 590e21bc572cfec3d807c41c80425b75ca9ac451 (patch) | |
tree | 3a005eda53a3038dc0160b1c4d4455175f14e3b7 | |
parent | 7050ae14a4f3acd4e522a4fb050d5cb136e8c529 (diff) | |
download | spice-protocol-590e21bc572cfec3d807c41c80425b75ca9ac451.tar.gz spice-protocol-590e21bc572cfec3d807c41c80425b75ca9ac451.tar.xz spice-protocol-590e21bc572cfec3d807c41c80425b75ca9ac451.zip |
Add standard memory barrier header
-rw-r--r-- | spice/barrier.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/spice/barrier.h b/spice/barrier.h new file mode 100644 index 0000000..c3caf1b --- /dev/null +++ b/spice/barrier.h @@ -0,0 +1,46 @@ +/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */ +/* + Copyright (C) 2009 Red Hat, Inc. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + * Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifndef _H_SPICE_BARRIER +#define _H_SPICE_BARRIER + +#ifdef __GNUC__ +#ifdef __i386__ +#define spice_mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") +#else +//mfence +#define spice_mb() __asm__ __volatile__ ("lock; addl $0,0(%%rsp)": : :"memory") +#endif +#else +#define spice_mb() __asm {lock add [esp], 0} +#endif + +#endif _H_SPICE_BARRIER |