1 files changed, 144 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/libs/atomic/src/lockpool.cpp b/3rdParty/Boost/src/libs/atomic/src/lockpool.cpp
new file mode 100644
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--- /dev/null
+++ b/3rdParty/Boost/src/libs/atomic/src/lockpool.cpp
@@ -0,0 +1,144 @@
+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2011 Helge Bahmann
+ * Copyright (c) 2013-2014 Andrey Semashev
+ */
+/*!
+ * \file   lockpool.cpp
+ *
+ * This file contains implementation of the lockpool used to emulate atomic ops.
+ */
+
+#include <cstddef>
+#include <boost/config.hpp>
+#include <boost/assert.hpp>
+#include <boost/memory_order.hpp>
+#include <boost/atomic/capabilities.hpp>
+
+#if BOOST_ATOMIC_FLAG_LOCK_FREE == 2
+#include <boost/atomic/detail/operations_lockfree.hpp>
+#elif !defined(BOOST_HAS_PTHREADS)
+#error Boost.Atomic: Unsupported target platform, POSIX threads are required when native atomic operations are not available
+#else
+#include <pthread.h>
+#define BOOST_ATOMIC_USE_PTHREAD
+#endif
+
+#include <boost/atomic/detail/lockpool.hpp>
+#include <boost/atomic/detail/pause.hpp>
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+namespace {
+
+// This seems to be the maximum across all modern CPUs
+// NOTE: This constant is made as a macro because some compilers (gcc 4.4 for one) don't allow enums or namespace scope constants in alignment attributes
+#define BOOST_ATOMIC_CACHE_LINE_SIZE 64
+
+template< unsigned int N >
+struct padding
+{
+    char data[N];
+};
+template< >
+struct padding< 0 >
+{
+};
+
+struct BOOST_ALIGNMENT(BOOST_ATOMIC_CACHE_LINE_SIZE) padded_lock
+{
+#if defined(BOOST_ATOMIC_USE_PTHREAD)
+    typedef pthread_mutex_t lock_type;
+#else
+    typedef atomics::detail::operations< 1u, false > operations;
+    typedef operations::storage_type lock_type;
+#endif
+
+    lock_type lock;
+    // The additional padding is needed to avoid false sharing between locks
+    enum { padding_size = (sizeof(lock_type) <= BOOST_ATOMIC_CACHE_LINE_SIZE ?
+        (BOOST_ATOMIC_CACHE_LINE_SIZE - sizeof(lock_type)) :
+        (BOOST_ATOMIC_CACHE_LINE_SIZE - sizeof(lock_type) % BOOST_ATOMIC_CACHE_LINE_SIZE)) };
+    padding< padding_size > pad;
+};
+
+static padded_lock g_lock_pool[41]
+#if defined(BOOST_ATOMIC_USE_PTHREAD)
+=
+{
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER
+}
+#endif
+;
+
+} // namespace
+
+
+#if !defined(BOOST_ATOMIC_USE_PTHREAD)
+
+// NOTE: This function must NOT be inline. Otherwise MSVC 9 will sometimes generate broken code for modulus operation which result in crashes.
+BOOST_ATOMIC_DECL lockpool::scoped_lock::scoped_lock(const volatile void* addr) BOOST_NOEXCEPT :
+    m_lock(&g_lock_pool[reinterpret_cast< std::size_t >(addr) % (sizeof(g_lock_pool) / sizeof(*g_lock_pool))].lock)
+{
+    while (padded_lock::operations::test_and_set(*static_cast< padded_lock::lock_type* >(m_lock), memory_order_acquire))
+    {
+        atomics::detail::pause();
+    }
+}
+
+BOOST_ATOMIC_DECL lockpool::scoped_lock::~scoped_lock() BOOST_NOEXCEPT
+{
+    padded_lock::operations::clear(*static_cast< padded_lock::lock_type* >(m_lock), memory_order_release);
+}
+
+BOOST_ATOMIC_DECL void signal_fence() BOOST_NOEXCEPT;
+
+#else // !defined(BOOST_ATOMIC_USE_PTHREAD)
+
+BOOST_ATOMIC_DECL lockpool::scoped_lock::scoped_lock(const volatile void* addr) BOOST_NOEXCEPT :
+    m_lock(&g_lock_pool[reinterpret_cast< std::size_t >(addr) % (sizeof(g_lock_pool) / sizeof(*g_lock_pool))].lock)
+{
+    BOOST_VERIFY(pthread_mutex_lock(static_cast< pthread_mutex_t* >(m_lock)) == 0);
+}
+
+BOOST_ATOMIC_DECL lockpool::scoped_lock::~scoped_lock() BOOST_NOEXCEPT
+{
+    BOOST_VERIFY(pthread_mutex_unlock(static_cast< pthread_mutex_t* >(m_lock)) == 0);
+}
+
+#endif // !defined(BOOST_ATOMIC_USE_PTHREAD)
+
+BOOST_ATOMIC_DECL void lockpool::thread_fence() BOOST_NOEXCEPT
+{
+#if BOOST_ATOMIC_THREAD_FENCE > 0
+    atomics::detail::thread_fence(memory_order_seq_cst);
+#else
+    // Emulate full fence by locking/unlocking a mutex
+    scoped_lock lock(0);
+#endif
+}
+
+BOOST_ATOMIC_DECL void lockpool::signal_fence() BOOST_NOEXCEPT
+{
+    // This function is intentionally non-inline, even if empty. This forces the compiler to treat its call as a compiler barrier.
+#if BOOST_ATOMIC_SIGNAL_FENCE > 0
+    atomics::detail::signal_fence(memory_order_seq_cst);
+#endif
+}
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost