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+//---------------------------------------------------------------------------//
+// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// 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
+//
+// See http://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_MEMORY_OBJECT_HPP
+#define BOOST_COMPUTE_MEMORY_OBJECT_HPP
+
+#include <boost/compute/config.hpp>
+#include <boost/compute/context.hpp>
+#include <boost/compute/kernel.hpp>
+#include <boost/compute/detail/get_object_info.hpp>
+#include <boost/compute/detail/assert_cl_success.hpp>
+
+namespace boost {
+namespace compute {
+
+/// \class memory_object
+/// \brief Base-class for memory objects.
+///
+/// The memory_object class is the base-class for memory objects on
+/// compute devices.
+///
+/// \see buffer, vector
+class memory_object
+{
+public:
+ /// Flags for the creation of memory objects.
+ enum mem_flags {
+ read_write = CL_MEM_READ_WRITE,
+ read_only = CL_MEM_READ_ONLY,
+ write_only = CL_MEM_WRITE_ONLY,
+ use_host_ptr = CL_MEM_USE_HOST_PTR,
+ alloc_host_ptr = CL_MEM_ALLOC_HOST_PTR,
+ copy_host_ptr = CL_MEM_COPY_HOST_PTR
+ #ifdef CL_VERSION_1_2
+ ,
+ host_write_only = CL_MEM_HOST_WRITE_ONLY,
+ host_read_only = CL_MEM_HOST_READ_ONLY,
+ host_no_access = CL_MEM_HOST_NO_ACCESS
+ #endif
+ };
+
+ /// Symbolic names for the OpenCL address spaces.
+ enum address_space {
+ global_memory,
+ local_memory,
+ private_memory,
+ constant_memory
+ };
+
+ /// Returns the underlying OpenCL memory object.
+ cl_mem& get() const
+ {
+ return const_cast<cl_mem &>(m_mem);
+ }
+
+ /// Returns the size of the memory object in bytes.
+ size_t get_memory_size() const
+ {
+ return get_memory_info<size_t>(CL_MEM_SIZE);
+ }
+
+ /// Returns the type for the memory object.
+ cl_mem_object_type get_memory_type() const
+ {
+ return get_memory_info<cl_mem_object_type>(CL_MEM_TYPE);
+ }
+
+ /// Returns the flags for the memory object.
+ cl_mem_flags get_memory_flags() const
+ {
+ return get_memory_info<cl_mem_flags>(CL_MEM_FLAGS);
+ }
+
+ /// Returns the context for the memory object.
+ context get_context() const
+ {
+ return context(get_memory_info<cl_context>(CL_MEM_CONTEXT));
+ }
+
+ /// Returns the host pointer associated with the memory object.
+ void* get_host_ptr() const
+ {
+ return get_memory_info<void *>(CL_MEM_HOST_PTR);
+ }
+
+ /// Returns the reference count for the memory object.
+ uint_ reference_count() const
+ {
+ return get_memory_info<uint_>(CL_MEM_REFERENCE_COUNT);
+ }
+
+ /// Returns information about the memory object.
+ ///
+ /// \see_opencl_ref{clGetMemObjectInfo}
+ template<class T>
+ T get_memory_info(cl_mem_info info) const
+ {
+ return detail::get_object_info<T>(clGetMemObjectInfo, m_mem, info);
+ }
+
+ #if defined(CL_VERSION_1_1) || defined(BOOST_COMPUTE_DOXYGEN_INVOKED)
+ /// Registers a function to be called when the memory object is deleted
+ /// and its resources freed.
+ ///
+ /// \see_opencl_ref{clSetMemObjectDestructorCallback}
+ ///
+ /// \opencl_version_warning{1,1}
+ void set_destructor_callback(void (BOOST_COMPUTE_CL_CALLBACK *callback)(
+ cl_mem memobj, void *user_data
+ ),
+ void *user_data = 0)
+ {
+ cl_int ret = clSetMemObjectDestructorCallback(m_mem, callback, user_data);
+ if(ret != CL_SUCCESS){
+ BOOST_THROW_EXCEPTION(opencl_error(ret));
+ }
+ }
+ /// Registers a function to be called when the memory object is deleted
+ /// and its resources freed.
+ ///
+ /// The function specified by \p callback must be invokable with zero
+ /// arguments (e.g. \c callback()).
+ ///
+ /// \opencl_version_warning{1,1}
+ template<class Function>
+ void set_destructor_callback(Function callback)
+ {
+ set_destructor_callback(
+ destructor_callback_invoker,
+ new boost::function<void()>(callback)
+ );
+ }
+ #endif // CL_VERSION_1_1
+
+ /// Returns \c true if the memory object is the same as \p other.
+ bool operator==(const memory_object &other) const
+ {
+ return m_mem == other.m_mem;
+ }
+
+ /// Returns \c true if the memory object is different from \p other.
+ bool operator!=(const memory_object &other) const
+ {
+ return m_mem != other.m_mem;
+ }
+
+private:
+ #ifdef CL_VERSION_1_1
+ /// \internal_
+ static void BOOST_COMPUTE_CL_CALLBACK
+ destructor_callback_invoker(cl_mem, void *user_data)
+ {
+ boost::function<void()> *callback =
+ static_cast<boost::function<void()> *>(user_data);
+
+ (*callback)();
+
+ delete callback;
+ }
+ #endif // CL_VERSION_1_1
+
+protected:
+ /// \internal_
+ memory_object()
+ : m_mem(0)
+ {
+ }
+
+ /// \internal_
+ explicit memory_object(cl_mem mem, bool retain = true)
+ : m_mem(mem)
+ {
+ if(m_mem && retain){
+ clRetainMemObject(m_mem);
+ }
+ }
+
+ /// \internal_
+ memory_object(const memory_object &other)
+ : m_mem(other.m_mem)
+ {
+ if(m_mem){
+ clRetainMemObject(m_mem);
+ }
+ }
+
+ /// \internal_
+ memory_object& operator=(const memory_object &other)
+ {
+ if(this != &other){
+ if(m_mem){
+ clReleaseMemObject(m_mem);
+ }
+
+ m_mem = other.m_mem;
+
+ if(m_mem){
+ clRetainMemObject(m_mem);
+ }
+ }
+
+ return *this;
+ }
+
+ #ifndef BOOST_COMPUTE_NO_RVALUE_REFERENCES
+ /// \internal_
+ memory_object(memory_object&& other) BOOST_NOEXCEPT
+ : m_mem(other.m_mem)
+ {
+ other.m_mem = 0;
+ }
+
+ /// \internal_
+ memory_object& operator=(memory_object&& other) BOOST_NOEXCEPT
+ {
+ if(m_mem){
+ clReleaseMemObject(m_mem);
+ }
+
+ m_mem = other.m_mem;
+ other.m_mem = 0;
+
+ return *this;
+ }
+ #endif // BOOST_COMPUTE_NO_RVALUE_REFERENCES
+
+ /// \internal_
+ ~memory_object()
+ {
+ if(m_mem){
+ BOOST_COMPUTE_ASSERT_CL_SUCCESS(
+ clReleaseMemObject(m_mem)
+ );
+ }
+ }
+
+protected:
+ cl_mem m_mem;
+};
+
+namespace detail {
+
+// set_kernel_arg specialization for memory_object
+template<>
+struct set_kernel_arg<memory_object>
+{
+ void operator()(kernel &kernel_, size_t index, const memory_object &mem)
+ {
+ kernel_.set_arg(index, mem.get());
+ }
+};
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_MEMORY_OBJECT_HPP