comparison bqvec/src/Barrier.cpp @ 372:af71cbdab621 tip

Update bqvec code

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