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<html><!-- Created using the cpp_pretty_printer from the dlib C++ library.  See http://dlib.net for updates. --><head><title>dlib C++ Library - gpu_data.h</title></head><body bgcolor='white'><pre>
<font color='#009900'>// Copyright (C) 2015  Davis E. King ([email protected])
</font><font color='#009900'>// License: Boost Software License   See LICENSE.txt for the full license.
</font><font color='#0000FF'>#ifndef</font> DLIB_GPU_DaTA_H_
<font color='#0000FF'>#define</font> DLIB_GPU_DaTA_H_

<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='gpu_data_abstract.h.html'>gpu_data_abstract.h</a>"
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>memory<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>cstring<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='cuda_errors.h.html'>cuda_errors.h</a>"
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='../serialize.h.html'>../serialize.h</a>"

<font color='#0000FF'>namespace</font> dlib
<b>{</b>

<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
    <font color='#0000FF'>class</font> <b><a name='gpu_data'></a>gpu_data</b> 
    <b>{</b>
        <font color='#009900'>/*!
            CONVENTION
                - if (size() != 0) then
                    - data_host == a pointer to size() floats in CPU memory.
                - if (data_device) then 
                    - data_device == a pointer to size() floats in device memory.

                - if (there might be an active async transfer from host to device) then
                    - have_active_transfer == true

                - We use the host_current and device_current bools to keep track of which
                  copy of the data (or both) are most current.  e.g. if the CPU has
                  modified the data and it hasn't been copied to the device yet then
                  host_current==true and device_current==false.

                  Similarly, we use device_in_use==true to indicate that device() has been
                  called and no operation to wait for all CUDA kernel completion has been
                  executed.  So if device_in_use==true then there might be a CUDA kernel
                  executing that is using the device memory block contained in this object.

        !*/</font>
    <font color='#0000FF'>public</font>:

        <b><a name='gpu_data'></a>gpu_data</b><font face='Lucida Console'>(</font>
        <font face='Lucida Console'>)</font> : data_size<font face='Lucida Console'>(</font><font color='#979000'>0</font><font face='Lucida Console'>)</font>, host_current<font face='Lucida Console'>(</font><font color='#979000'>true</font><font face='Lucida Console'>)</font>, device_current<font face='Lucida Console'>(</font><font color='#979000'>true</font><font face='Lucida Console'>)</font>,have_active_transfer<font face='Lucida Console'>(</font><font color='#979000'>false</font><font face='Lucida Console'>)</font>,device_in_use<font face='Lucida Console'>(</font><font color='#979000'>false</font><font face='Lucida Console'>)</font>, the_device_id<font face='Lucida Console'>(</font><font color='#979000'>0</font><font face='Lucida Console'>)</font>
        <b>{</b>
        <b>}</b>

        <font color='#009900'>// Not copyable
</font>        <b><a name='gpu_data'></a>gpu_data</b><font face='Lucida Console'>(</font><font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font> <font color='#0000FF'>delete</font>;
        gpu_data<font color='#5555FF'>&amp;</font> <b><a name='operator'></a>operator</b><font color='#5555FF'>=</font><font face='Lucida Console'>(</font><font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font> <font color='#0000FF'>delete</font>;

        <font color='#009900'>// but is movable
</font>        <b><a name='gpu_data'></a>gpu_data</b><font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> item<font face='Lucida Console'>)</font> : gpu_data<font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <b>{</b> <font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>item<font face='Lucida Console'>)</font>; <b>}</b>
        gpu_data<font color='#5555FF'>&amp;</font> <b><a name='operator'></a>operator</b><font color='#5555FF'>=</font><font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> item<font face='Lucida Console'>)</font> <b>{</b> <font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>item<font face='Lucida Console'>)</font>; <font color='#0000FF'>return</font> <font color='#5555FF'>*</font><font color='#0000FF'>this</font>; <b>}</b>

        <font color='#0000FF'><u>int</u></font> <b><a name='device_id'></a>device_id</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> <b>{</b> <font color='#0000FF'>return</font> the_device_id; <b>}</b>

<font color='#0000FF'>#ifdef</font> DLIB_USE_CUDA
        <font color='#0000FF'><u>void</u></font> <b><a name='async_copy_to_device'></a>async_copy_to_device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font>; 
        <font color='#0000FF'><u>void</u></font> <b><a name='set_size'></a>set_size</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font> new_size<font face='Lucida Console'>)</font>;
<font color='#0000FF'>#else</font>
        <font color='#009900'>// Note that calls to host() or device() will block until any async transfers are complete.
</font>        <font color='#0000FF'><u>void</u></font> <b><a name='async_copy_to_device'></a>async_copy_to_device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font><b>{</b><b>}</b>

        <font color='#0000FF'><u>void</u></font> <b><a name='set_size'></a>set_size</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font> new_size<font face='Lucida Console'>)</font>
        <b>{</b>
            <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>new_size <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
            <b>{</b>
                data_size <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
                host_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
                device_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
                device_in_use <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
                data_host.<font color='#BB00BB'>reset</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
                data_device.<font color='#BB00BB'>reset</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            <b>}</b>
            <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>new_size <font color='#5555FF'>!</font><font color='#5555FF'>=</font> data_size<font face='Lucida Console'>)</font>
            <b>{</b>
                data_size <font color='#5555FF'>=</font> new_size;
                host_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
                device_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
                device_in_use <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
                data_host.<font color='#BB00BB'>reset</font><font face='Lucida Console'>(</font><font color='#0000FF'>new</font> <font color='#0000FF'><u>float</u></font>[new_size], std::default_delete<font color='#5555FF'>&lt;</font><font color='#0000FF'><u>float</u></font>[]<font color='#5555FF'>&gt;</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
                data_device.<font color='#BB00BB'>reset</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            <b>}</b>
        <b>}</b>
<font color='#0000FF'>#endif</font>

        <font color='#0000FF'>const</font> <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='host'></a>host</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> 
        <b>{</b> 
            <font color='#BB00BB'>copy_to_host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            <font color='#0000FF'>return</font> data_host.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='host'></a>host</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> 
        <b>{</b>
            <font color='#BB00BB'>copy_to_host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            device_current <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
            <font color='#0000FF'>return</font> data_host.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='host_write_only'></a>host_write_only</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> 
        <b>{</b>
            host_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
            device_current <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
            <font color='#0000FF'>return</font> data_host.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'>const</font> <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='device'></a>device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> 
        <b>{</b> 
<font color='#0000FF'>#ifndef</font> DLIB_USE_CUDA
            <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font><font color='#979000'>false</font>, "<font color='#CC0000'>CUDA NOT ENABLED</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>#endif</font>
            <font color='#BB00BB'>copy_to_device</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            device_in_use <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
            <font color='#0000FF'>return</font> data_device.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='device'></a>device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> 
        <b>{</b>
<font color='#0000FF'>#ifndef</font> DLIB_USE_CUDA
            <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font><font color='#979000'>false</font>, "<font color='#CC0000'>CUDA NOT ENABLED</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>#endif</font>
            <font color='#BB00BB'>copy_to_device</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            host_current <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
            device_in_use <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
            <font color='#0000FF'>return</font> data_device.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'><u>float</u></font><font color='#5555FF'>*</font> <b><a name='device_write_only'></a>device_write_only</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>
        <b>{</b>
<font color='#0000FF'>#ifndef</font> DLIB_USE_CUDA
            <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font><font color='#979000'>false</font>, "<font color='#CC0000'>CUDA NOT ENABLED</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>#endif</font>
            <font color='#BB00BB'>wait_for_transfer_to_finish</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
            host_current <font color='#5555FF'>=</font> <font color='#979000'>false</font>;
            device_current <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
            device_in_use <font color='#5555FF'>=</font> <font color='#979000'>true</font>;
            <font color='#0000FF'>return</font> data_device.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; 
        <b>}</b>

        <font color='#0000FF'><u>bool</u></font> <b><a name='host_ready'></a>host_ready</b> <font face='Lucida Console'>(</font>
        <font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> <b>{</b> <font color='#0000FF'>return</font> host_current; <b>}</b>

        <font color='#0000FF'><u>bool</u></font> <b><a name='device_ready'></a>device_ready</b> <font face='Lucida Console'>(</font>
        <font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> <b>{</b> <font color='#0000FF'>return</font> device_current <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> <font color='#5555FF'>!</font>have_active_transfer; <b>}</b>

        <font color='#0000FF'><u>size_t</u></font> <b><a name='size'></a>size</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font> <b>{</b> <font color='#0000FF'>return</font> data_size; <b>}</b>

        <font color='#0000FF'><u>void</u></font> <b><a name='swap'></a>swap</b> <font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font> item<font face='Lucida Console'>)</font>
        <b>{</b>
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>data_size, item.data_size<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>host_current, item.host_current<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>device_current, item.device_current<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>have_active_transfer, item.have_active_transfer<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>data_host, item.data_host<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>data_device, item.data_device<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>cuda_stream, item.cuda_stream<font face='Lucida Console'>)</font>;
            std::<font color='#BB00BB'>swap</font><font face='Lucida Console'>(</font>the_device_id, item.the_device_id<font face='Lucida Console'>)</font>;
        <b>}</b>

    <font color='#0000FF'>private</font>:

<font color='#0000FF'>#ifdef</font> DLIB_USE_CUDA
        <font color='#0000FF'><u>void</u></font> <b><a name='copy_to_device'></a>copy_to_device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font>;
        <font color='#0000FF'><u>void</u></font> <b><a name='copy_to_host'></a>copy_to_host</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font>;
        <font color='#0000FF'><u>void</u></font> <b><a name='wait_for_transfer_to_finish'></a>wait_for_transfer_to_finish</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font>;
<font color='#0000FF'>#else</font>
        <font color='#0000FF'><u>void</u></font> <b><a name='copy_to_device'></a>copy_to_device</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font><b>{</b><b>}</b>
        <font color='#0000FF'><u>void</u></font> <b><a name='copy_to_host'></a>copy_to_host</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font><b>{</b><b>}</b>
        <font color='#0000FF'><u>void</u></font> <b><a name='wait_for_transfer_to_finish'></a>wait_for_transfer_to_finish</b><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#0000FF'>const</font><b>{</b><b>}</b>
<font color='#0000FF'>#endif</font>


        <font color='#0000FF'><u>size_t</u></font> data_size;
        <font color='#0000FF'>mutable</font> <font color='#0000FF'><u>bool</u></font> host_current;
        <font color='#0000FF'>mutable</font> <font color='#0000FF'><u>bool</u></font> device_current;
        <font color='#0000FF'>mutable</font> <font color='#0000FF'><u>bool</u></font> have_active_transfer;
        <font color='#0000FF'>mutable</font> <font color='#0000FF'><u>bool</u></font> device_in_use;

        std::shared_ptr<font color='#5555FF'>&lt;</font><font color='#0000FF'><u>float</u></font><font color='#5555FF'>&gt;</font> data_host;
        std::shared_ptr<font color='#5555FF'>&lt;</font><font color='#0000FF'><u>float</u></font><font color='#5555FF'>&gt;</font> data_device;
        std::shared_ptr<font color='#5555FF'>&lt;</font><font color='#0000FF'><u>void</u></font><font color='#5555FF'>&gt;</font> cuda_stream;
        <font color='#0000FF'><u>int</u></font> the_device_id;
    <b>}</b>;

    <font color='#0000FF'>inline</font> <font color='#0000FF'><u>void</u></font> <b><a name='serialize'></a>serialize</b><font face='Lucida Console'>(</font><font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font> item, std::ostream<font color='#5555FF'>&amp;</font> out<font face='Lucida Console'>)</font>
    <b>{</b>
        <font color='#0000FF'><u>int</u></font> version <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
        <font color='#BB00BB'>serialize</font><font face='Lucida Console'>(</font>version, out<font face='Lucida Console'>)</font>;
        <font color='#BB00BB'>serialize</font><font face='Lucida Console'>(</font>item.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, out<font face='Lucida Console'>)</font>;
        <font color='#0000FF'>auto</font> data <font color='#5555FF'>=</font> item.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
        <font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font> i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'>&lt;</font> item.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; <font color='#5555FF'>+</font><font color='#5555FF'>+</font>i<font face='Lucida Console'>)</font>
            <font color='#BB00BB'>serialize</font><font face='Lucida Console'>(</font>data[i], out<font face='Lucida Console'>)</font>;
    <b>}</b>

    <font color='#0000FF'>inline</font> <font color='#0000FF'><u>void</u></font> <b><a name='deserialize'></a>deserialize</b><font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font> item, std::istream<font color='#5555FF'>&amp;</font> in<font face='Lucida Console'>)</font>
    <b>{</b>
        <font color='#0000FF'><u>int</u></font> version;
        <font color='#BB00BB'>deserialize</font><font face='Lucida Console'>(</font>version, in<font face='Lucida Console'>)</font>;
        <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>version <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>
            <font color='#0000FF'>throw</font> <font color='#BB00BB'>serialization_error</font><font face='Lucida Console'>(</font>"<font color='#CC0000'>Unexpected version found while deserializing dlib::gpu_data.</font>"<font face='Lucida Console'>)</font>;
        <font color='#0000FF'><u>size_t</u></font> s;
        <font color='#BB00BB'>deserialize</font><font face='Lucida Console'>(</font>s, in<font face='Lucida Console'>)</font>;
        item.<font color='#BB00BB'>set_size</font><font face='Lucida Console'>(</font>s<font face='Lucida Console'>)</font>;
        <font color='#0000FF'>auto</font> data <font color='#5555FF'>=</font> item.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
        <font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font> i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'>&lt;</font> item.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>; <font color='#5555FF'>+</font><font color='#5555FF'>+</font>i<font face='Lucida Console'>)</font>
            <font color='#BB00BB'>deserialize</font><font face='Lucida Console'>(</font>data[i], in<font face='Lucida Console'>)</font>;
    <b>}</b>

<font color='#0000FF'>#ifdef</font> DLIB_USE_CUDA
    <font color='#0000FF'><u>void</u></font> <b><a name='memcpy'></a>memcpy</b> <font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font> dest, <font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font> src<font face='Lucida Console'>)</font>;

    <font color='#0000FF'><u>void</u></font> <b><a name='memcpy'></a>memcpy</b> <font face='Lucida Console'>(</font>
        gpu_data<font color='#5555FF'>&amp;</font> dest, 
        <font color='#0000FF'><u>size_t</u></font> dest_offset,
        <font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font> src,
        <font color='#0000FF'><u>size_t</u></font> src_offset,
        <font color='#0000FF'><u>size_t</u></font> num
    <font face='Lucida Console'>)</font>;

<font color='#0000FF'>#else</font>

    <font color='#0000FF'>inline</font> <font color='#0000FF'><u>void</u></font> <b><a name='memcpy'></a>memcpy</b> <font face='Lucida Console'>(</font>gpu_data<font color='#5555FF'>&amp;</font> dest, <font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font> src<font face='Lucida Console'>)</font>
    <b>{</b>
        <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font>dest.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> src.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
        <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>src.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> <font color='#5555FF'>&amp;</font>dest <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font>src<font face='Lucida Console'>)</font>
            <font color='#0000FF'>return</font>;
        std::<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>dest.<font color='#BB00BB'>host_write_only</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, src.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, <font color='#0000FF'>sizeof</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>float</u></font><font face='Lucida Console'>)</font><font color='#5555FF'>*</font>src.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
    <b>}</b>

    <font color='#0000FF'>inline</font> <font color='#0000FF'><u>void</u></font> <b><a name='memcpy'></a>memcpy</b> <font face='Lucida Console'>(</font>
        gpu_data<font color='#5555FF'>&amp;</font> dest, 
        <font color='#0000FF'><u>size_t</u></font> dest_offset,
        <font color='#0000FF'>const</font> gpu_data<font color='#5555FF'>&amp;</font> src,
        <font color='#0000FF'><u>size_t</u></font> src_offset,
        <font color='#0000FF'><u>size_t</u></font> num
    <font face='Lucida Console'>)</font>
    <b>{</b>
        <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font>dest_offset <font color='#5555FF'>+</font> num <font color='#5555FF'>&lt;</font><font color='#5555FF'>=</font> dest.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
        <font color='#BB00BB'>DLIB_CASSERT</font><font face='Lucida Console'>(</font>src_offset <font color='#5555FF'>+</font> num <font color='#5555FF'>&lt;</font><font color='#5555FF'>=</font> src.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
        <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>num <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
            <font color='#0000FF'>return</font>;
        <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>&amp;</font>dest <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font>src <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> std::<font color='#BB00BB'>max</font><font face='Lucida Console'>(</font>dest_offset, src_offset<font face='Lucida Console'>)</font> <font color='#5555FF'>&lt;</font> std::<font color='#BB00BB'>min</font><font face='Lucida Console'>(</font>dest_offset,src_offset<font face='Lucida Console'>)</font><font color='#5555FF'>+</font>num<font face='Lucida Console'>)</font>
        <b>{</b>
            <font color='#009900'>// if they perfectly alias each other then there is nothing to do
</font>            <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>dest_offset <font color='#5555FF'>=</font><font color='#5555FF'>=</font> src_offset<font face='Lucida Console'>)</font>
                <font color='#0000FF'>return</font>;
            <font color='#0000FF'>else</font>
                std::<font color='#BB00BB'>memmove</font><font face='Lucida Console'>(</font>dest.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>+</font>dest_offset, src.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>+</font>src_offset, <font color='#0000FF'>sizeof</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>float</u></font><font face='Lucida Console'>)</font><font color='#5555FF'>*</font>num<font face='Lucida Console'>)</font>;
        <b>}</b>
        <font color='#0000FF'>else</font>
        <b>{</b>
            <font color='#009900'>// if we write to the entire thing then we can use host_write_only()
</font>            <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>dest_offset <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> num <font color='#5555FF'>=</font><font color='#5555FF'>=</font> dest.<font color='#BB00BB'>size</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
                std::<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>dest.<font color='#BB00BB'>host_write_only</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, src.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>+</font>src_offset, <font color='#0000FF'>sizeof</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>float</u></font><font face='Lucida Console'>)</font><font color='#5555FF'>*</font>num<font face='Lucida Console'>)</font>;
            <font color='#0000FF'>else</font>
                std::<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>dest.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>+</font>dest_offset, src.<font color='#BB00BB'>host</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>+</font>src_offset, <font color='#0000FF'>sizeof</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>float</u></font><font face='Lucida Console'>)</font><font color='#5555FF'>*</font>num<font face='Lucida Console'>)</font>;
        <b>}</b>
    <b>}</b>
<font color='#0000FF'>#endif</font>

<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
<b>}</b>

<font color='#0000FF'>#endif</font> <font color='#009900'>// DLIB_GPU_DaTA_H_
</font>

</pre></body></html>