Chris@372: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@372: 
Chris@372: /*
Chris@372:     bqvec
Chris@372: 
Chris@372:     A small library for vector arithmetic and allocation in C++ using
Chris@372:     raw C pointer arrays.
Chris@372: 
Chris@372:     Copyright 2007-2018 Particular Programs Ltd.
Chris@372: 
Chris@372:     Permission is hereby granted, free of charge, to any person
Chris@372:     obtaining a copy of this software and associated documentation
Chris@372:     files (the "Software"), to deal in the Software without
Chris@372:     restriction, including without limitation the rights to use, copy,
Chris@372:     modify, merge, publish, distribute, sublicense, and/or sell copies
Chris@372:     of the Software, and to permit persons to whom the Software is
Chris@372:     furnished to do so, subject to the following conditions:
Chris@372: 
Chris@372:     The above copyright notice and this permission notice shall be
Chris@372:     included in all copies or substantial portions of the Software.
Chris@372: 
Chris@372:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
Chris@372:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Chris@372:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
Chris@372:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
Chris@372:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
Chris@372:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
Chris@372:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Chris@372: 
Chris@372:     Except as contained in this notice, the names of Chris Cannam and
Chris@372:     Particular Programs Ltd shall not be used in advertising or
Chris@372:     otherwise to promote the sale, use or other dealings in this
Chris@372:     Software without prior written authorization.
Chris@372: */
Chris@372: 
Chris@372: #include "Barrier.h"
Chris@372: 
Chris@372: #if defined __APPLE__
Chris@372: #if !defined __MAC_10_12
Chris@372: #include <libkern/OSAtomic.h>
Chris@372: #endif
Chris@372: #endif
Chris@372: #if defined _WIN32 && defined _MSC_VER
Chris@372: #include <Windows.h>
Chris@372: #endif
Chris@372: 
Chris@372: namespace breakfastquay {
Chris@372: 
Chris@372: void system_memorybarrier()
Chris@372: {
Chris@372: #if defined __APPLE__
Chris@372: 
Chris@372: #if defined __MAC_10_12
Chris@372:     __sync_synchronize();
Chris@372: #else
Chris@372:     OSMemoryBarrier();
Chris@372: #endif
Chris@372:     
Chris@372: #elif (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
Chris@372: 
Chris@372:     __sync_synchronize();
Chris@372: 
Chris@372: #elif defined _WIN32 
Chris@372: 
Chris@372: #if defined _MSC_VER
Chris@372:     MemoryBarrier();
Chris@372: #else /* (mingw) */
Chris@372:     LONG Barrier = 0;
Chris@372:     __asm__ __volatile__("xchgl %%eax,%0 "
Chris@372:                          : "=r" (Barrier));
Chris@372: #endif
Chris@372: 
Chris@372: #else
Chris@372: #warning "No memory barrier defined"
Chris@372: #endif
Chris@372:     
Chris@372: }
Chris@372: 
Chris@372: }
Chris@372: