fixed adding file problem

[c11concurrency-benchmarks.git] / gdax-orderbook-hpp / demo / dependencies / libcds-2.3.2 / cds / gc / details / hp_common.h

diff --git a/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/gc/details/hp_common.h b/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/gc/details/hp_common.h
new file mode 100644 (file)
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--- /dev/null
+++ b/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/gc/details/hp_common.h
@@ -0,0 +1,184 @@
+/*
+    This file is a part of libcds - Concurrent Data Structures library
+
+    (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+    Source code repo: http://github.com/khizmax/libcds/
+    Download: http://sourceforge.net/projects/libcds/files/
+
+    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.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 CDSLIB_GC_DETAILS_HP_COMMON_H
+#define CDSLIB_GC_DETAILS_HP_COMMON_H
+
+#include <cds/algo/atomic.h>
+#include <cds/gc/details/retired_ptr.h>
+
+#ifdef CDS_ENABLE_HPSTAT
+#   define CDS_HPSTAT( expr ) expr
+#else
+#   define CDS_HPSTAT( expr )
+#endif
+
+//@cond
+namespace cds { namespace gc { namespace hp { namespace common {
+
+    /// Hazard pointer type
+    typedef void*   hazard_ptr;
+
+    /// Retired pointer
+    using cds::gc::details::retired_ptr;
+    using cds::gc::make_retired_ptr;
+
+    /// Hazard pointer guard
+    class guard
+    {
+    public:
+        guard() noexcept
+            : hp_( nullptr )
+            , next_( nullptr )
+        {}
+
+        template <typename T>
+        T* operator=( T* ptr ) noexcept
+        {
+            set( ptr );
+            return ptr;
+        }
+
+        std::nullptr_t operator=( std::nullptr_t ) noexcept
+        {
+            clear();
+            return nullptr;
+        }
+
+        hazard_ptr get() const noexcept
+        {
+            return hp_.load( atomics::memory_order_acquire );
+        }
+
+        hazard_ptr get( atomics::memory_order order ) const noexcept
+        {
+            return hp_.load( order );
+        }
+
+        template <typename T>
+        T* get_as() const noexcept
+        {
+            return reinterpret_cast<T*>( get());
+        }
+
+        template <typename T>
+        void set( T* ptr ) noexcept
+        {
+            hp_.store( reinterpret_cast<hazard_ptr>( ptr ), atomics::memory_order_release );
+        }
+
+        void clear( atomics::memory_order order ) noexcept
+        {
+            hp_.store( nullptr, order );
+        }
+
+        void clear() noexcept
+        {
+            clear( atomics::memory_order_release );
+        }
+
+    private:
+        atomics::atomic<hazard_ptr>   hp_;
+
+    public:
+        guard* next_;   // free guard list
+    };
+
+    /// Array of guards
+    template <size_t Capacity>
+    class guard_array
+    {
+    public:
+        static size_t const c_nCapacity = Capacity;
+
+    public:
+        guard_array()
+            : arr_{ nullptr }
+        {}
+
+        static constexpr size_t capacity()
+        {
+            return c_nCapacity;
+        }
+
+        guard* operator[]( size_t idx ) const noexcept
+        {
+            assert( idx < capacity());
+            return arr_[idx];
+        }
+
+        template <typename T>
+        void set( size_t idx, T* ptr ) noexcept
+        {
+            assert( idx < capacity());
+            assert( arr_[idx] != nullptr );
+
+            arr_[idx]->set( ptr );
+        }
+
+        void clear( size_t idx ) noexcept
+        {
+            assert( idx < capacity());
+            assert( arr_[idx] != nullptr );
+
+            arr_[idx]->clear();
+        }
+
+        guard* release( size_t idx ) noexcept
+        {
+            assert( idx < capacity());
+
+            guard* g = arr_[idx];
+            arr_[idx] = nullptr;
+            return g;
+        }
+
+        void reset( size_t idx, guard* g ) noexcept
+        {
+            assert( idx < capacity());
+            assert( arr_[idx] == nullptr );
+
+            arr_[idx] = g;
+        }
+
+    private:
+        guard*  arr_[c_nCapacity];
+    };
+
+
+    /// Retired pointer disposer
+    typedef void ( *disposer_func )( void* );
+
+}}}} // namespace cds::gc::hp::common
+//@endcond
+
+#endif // #ifndef CDSLIB_GC_DETAILS_HP_COMMON_H
+
+