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<li class="navelem"><a class="el" href="namespace_d3_d12_m_a.html">D3D12MA</a></li><li class="navelem"><a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html">VirtualBlock</a></li> </ul>
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<div class="header">
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<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="class_d3_d12_m_a_1_1_virtual_block-members.html">List of all members</a> </div>
<div class="headertitle"><div class="title">D3D12MA::VirtualBlock Class Reference</div></div>
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<p>Represents pure allocation algorithm and a data structure with allocations in some memory block, without actually allocating any GPU memory.
<a href="#details">More...</a></p>
<p><code>#include &lt;D3D12MemAlloc.h&gt;</code></p>
<div class="dynheader">
Inheritance diagram for D3D12MA::VirtualBlock:</div>
<div class="dyncontent">
<div class="center">
<img src="class_d3_d12_m_a_1_1_virtual_block.png" alt=""/>
</div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-methods" name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a7b23fd2da6f0343095fb14b31395678b" id="r_a7b23fd2da6f0343095fb14b31395678b"><td class="memItemLeft" align="right" valign="top">BOOL&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a7b23fd2da6f0343095fb14b31395678b">IsEmpty</a> () const</td></tr>
<tr class="memdesc:a7b23fd2da6f0343095fb14b31395678b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if the block is empty - contains 0 allocations. <br /></td></tr>
<tr class="separator:a7b23fd2da6f0343095fb14b31395678b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac605dce05ca0d411e46079f0bad765d1" id="r_ac605dce05ca0d411e46079f0bad765d1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ac605dce05ca0d411e46079f0bad765d1">GetAllocationInfo</a> (<a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a> allocation, <a class="el" href="struct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___a_l_l_o_c_a_t_i_o_n___i_n_f_o.html">VIRTUAL_ALLOCATION_INFO</a> *pInfo) const</td></tr>
<tr class="memdesc:ac605dce05ca0d411e46079f0bad765d1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about an allocation - its offset, size and custom pointer. <br /></td></tr>
<tr class="separator:ac605dce05ca0d411e46079f0bad765d1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9281daf76e888ea1bd5247d5732e8179" id="r_a9281daf76e888ea1bd5247d5732e8179"><td class="memItemLeft" align="right" valign="top">HRESULT&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a9281daf76e888ea1bd5247d5732e8179">Allocate</a> (const <a class="el" href="struct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">VIRTUAL_ALLOCATION_DESC</a> *pDesc, <a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a> *pAllocation, UINT64 *pOffset)</td></tr>
<tr class="memdesc:a9281daf76e888ea1bd5247d5732e8179"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates new allocation. <br /></td></tr>
<tr class="separator:a9281daf76e888ea1bd5247d5732e8179"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aab44e46bd122054c894fc84740f1e8fb" id="r_aab44e46bd122054c894fc84740f1e8fb"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#aab44e46bd122054c894fc84740f1e8fb">FreeAllocation</a> (<a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a> allocation)</td></tr>
<tr class="memdesc:aab44e46bd122054c894fc84740f1e8fb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees the allocation. <br /></td></tr>
<tr class="separator:aab44e46bd122054c894fc84740f1e8fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae22b18c0b7c31b44c1d740f886369189" id="r_ae22b18c0b7c31b44c1d740f886369189"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ae22b18c0b7c31b44c1d740f886369189">Clear</a> ()</td></tr>
<tr class="memdesc:ae22b18c0b7c31b44c1d740f886369189"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees all the allocations. <br /></td></tr>
<tr class="separator:ae22b18c0b7c31b44c1d740f886369189"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab96e34500b75a83a09d73b4585669114" id="r_ab96e34500b75a83a09d73b4585669114"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ab96e34500b75a83a09d73b4585669114">SetAllocationPrivateData</a> (<a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a> allocation, void *pPrivateData)</td></tr>
<tr class="memdesc:ab96e34500b75a83a09d73b4585669114"><td class="mdescLeft">&#160;</td><td class="mdescRight">Changes custom pointer for an allocation to a new value. <br /></td></tr>
<tr class="separator:ab96e34500b75a83a09d73b4585669114"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0f1dda0e019e218b021f64987a74b110" id="r_a0f1dda0e019e218b021f64987a74b110"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a0f1dda0e019e218b021f64987a74b110">GetStatistics</a> (<a class="el" href="struct_d3_d12_m_a_1_1_statistics.html">Statistics</a> *pStats) const</td></tr>
<tr class="memdesc:a0f1dda0e019e218b021f64987a74b110"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves basic statistics of the virtual block that are fast to calculate. <br /></td></tr>
<tr class="separator:a0f1dda0e019e218b021f64987a74b110"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a614a82247ce6cf29c38895e16eb971d9" id="r_a614a82247ce6cf29c38895e16eb971d9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a614a82247ce6cf29c38895e16eb971d9">CalculateStatistics</a> (<a class="el" href="struct_d3_d12_m_a_1_1_detailed_statistics.html">DetailedStatistics</a> *pStats) const</td></tr>
<tr class="memdesc:a614a82247ce6cf29c38895e16eb971d9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves detailed statistics of the virtual block that are slower to calculate. <br /></td></tr>
<tr class="separator:a614a82247ce6cf29c38895e16eb971d9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a828a27070bfa762cae796d4c8f2ef703" id="r_a828a27070bfa762cae796d4c8f2ef703"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a828a27070bfa762cae796d4c8f2ef703">BuildStatsString</a> (WCHAR **ppStatsString) const</td></tr>
<tr class="memdesc:a828a27070bfa762cae796d4c8f2ef703"><td class="mdescLeft">&#160;</td><td class="mdescRight">Builds and returns statistics as a string in JSON format, including the list of allocations with their parameters. <br /></td></tr>
<tr class="separator:a828a27070bfa762cae796d4c8f2ef703"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6f78ddaa7da194e239089e52093e68a9" id="r_a6f78ddaa7da194e239089e52093e68a9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a6f78ddaa7da194e239089e52093e68a9">FreeStatsString</a> (WCHAR *pStatsString) const</td></tr>
<tr class="memdesc:a6f78ddaa7da194e239089e52093e68a9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees memory of a string returned from <a class="el" href="#a828a27070bfa762cae796d4c8f2ef703" title="Builds and returns statistics as a string in JSON format, including the list of allocations with thei...">VirtualBlock::BuildStatsString</a>. <br /></td></tr>
<tr class="separator:a6f78ddaa7da194e239089e52093e68a9"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Represents pure allocation algorithm and a data structure with allocations in some memory block, without actually allocating any GPU memory. </p>
<p>This class allows to use the core algorithm of the library custom allocations e.g. CPU memory or sub-allocation regions inside a single GPU buffer.</p>
<p>To create this object, fill in <a class="el" href="struct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___b_l_o_c_k___d_e_s_c.html" title="Parameters of created D3D12MA::VirtualBlock object to be passed to CreateVirtualBlock().">D3D12MA::VIRTUAL_BLOCK_DESC</a> and call <a class="el" href="#a0485028cbe13b5457fe422865f7edf74" title="Creates new D3D12MA::VirtualBlock object and returns it through ppVirtualBlock.">CreateVirtualBlock()</a>. To destroy it, call its method <code>VirtualBlock::Release()</code>. You need to free all the allocations within this block or call <a class="el" href="#ae22b18c0b7c31b44c1d740f886369189" title="Frees all the allocations.">Clear()</a> before destroying it.</p>
<p>This object is not thread-safe - should not be used from multiple threads simultaneously, must be synchronized externally. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a9281daf76e888ea1bd5247d5732e8179" name="a9281daf76e888ea1bd5247d5732e8179"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9281daf76e888ea1bd5247d5732e8179">&#9670;&#160;</a></span>Allocate()</h2>
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<td class="memname">HRESULT D3D12MA::VirtualBlock::Allocate </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="struct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">VIRTUAL_ALLOCATION_DESC</a> *</td> <td class="paramname"><span class="paramname"><em>pDesc</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a> *</td> <td class="paramname"><span class="paramname"><em>pAllocation</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">UINT64 *</td> <td class="paramname"><span class="paramname"><em>pOffset</em></span>&#160;)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Creates new allocation. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">pDesc</td><td></td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pAllocation</td><td>Unique indentifier of the new allocation within single block. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pOffset</td><td>Returned offset of the new allocation. Optional, can be null. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>S_OK</code> if allocation succeeded, <code>E_OUTOFMEMORY</code> if it failed.</dd></dl>
<p>If the allocation failed, <code>pAllocation-&gt;AllocHandle</code> is set to 0 and <code>pOffset</code>, if not null, is set to <code>UINT64_MAX</code>. </p>
</div>
</div>
<a id="a828a27070bfa762cae796d4c8f2ef703" name="a828a27070bfa762cae796d4c8f2ef703"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a828a27070bfa762cae796d4c8f2ef703">&#9670;&#160;</a></span>BuildStatsString()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::BuildStatsString </td>
<td>(</td>
<td class="paramtype">WCHAR **</td> <td class="paramname"><span class="paramname"><em>ppStatsString</em></span></td><td>)</td>
<td> const</td>
</tr>
</table>
</div><div class="memdoc">
<p>Builds and returns statistics as a string in JSON format, including the list of allocations with their parameters. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">ppStatsString</td><td>Must be freed using <a class="el" href="#a6f78ddaa7da194e239089e52093e68a9" title="Frees memory of a string returned from VirtualBlock::BuildStatsString.">VirtualBlock::FreeStatsString</a>. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="a614a82247ce6cf29c38895e16eb971d9" name="a614a82247ce6cf29c38895e16eb971d9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a614a82247ce6cf29c38895e16eb971d9">&#9670;&#160;</a></span>CalculateStatistics()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::CalculateStatistics </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_detailed_statistics.html">DetailedStatistics</a> *</td> <td class="paramname"><span class="paramname"><em>pStats</em></span></td><td>)</td>
<td> const</td>
</tr>
</table>
</div><div class="memdoc">
<p>Retrieves detailed statistics of the virtual block that are slower to calculate. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">pStats</td><td>Statistics of the virtual block. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="ae22b18c0b7c31b44c1d740f886369189" name="ae22b18c0b7c31b44c1d740f886369189"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae22b18c0b7c31b44c1d740f886369189">&#9670;&#160;</a></span>Clear()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::Clear </td>
<td>(</td>
<td class="paramname"><span class="paramname"></span></td><td>)</td>
<td></td>
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<p>Frees all the allocations. </p>
</div>
</div>
<a id="aab44e46bd122054c894fc84740f1e8fb" name="aab44e46bd122054c894fc84740f1e8fb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aab44e46bd122054c894fc84740f1e8fb">&#9670;&#160;</a></span>FreeAllocation()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::FreeAllocation </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em></span></td><td>)</td>
<td></td>
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<p>Frees the allocation. </p>
<p>Calling this function with <code>allocation.AllocHandle == 0</code> is correct and does nothing. </p>
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<a id="a6f78ddaa7da194e239089e52093e68a9" name="a6f78ddaa7da194e239089e52093e68a9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6f78ddaa7da194e239089e52093e68a9">&#9670;&#160;</a></span>FreeStatsString()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::FreeStatsString </td>
<td>(</td>
<td class="paramtype">WCHAR *</td> <td class="paramname"><span class="paramname"><em>pStatsString</em></span></td><td>)</td>
<td> const</td>
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</table>
</div><div class="memdoc">
<p>Frees memory of a string returned from <a class="el" href="#a828a27070bfa762cae796d4c8f2ef703" title="Builds and returns statistics as a string in JSON format, including the list of allocations with thei...">VirtualBlock::BuildStatsString</a>. </p>
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<a id="ac605dce05ca0d411e46079f0bad765d1" name="ac605dce05ca0d411e46079f0bad765d1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac605dce05ca0d411e46079f0bad765d1">&#9670;&#160;</a></span>GetAllocationInfo()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::GetAllocationInfo </td>
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<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em>, </span></td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___a_l_l_o_c_a_t_i_o_n___i_n_f_o.html">VIRTUAL_ALLOCATION_INFO</a> *</td> <td class="paramname"><span class="paramname"><em>pInfo</em></span>&#160;) const</td>
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<p>Returns information about an allocation - its offset, size and custom pointer. </p>
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<a id="a0f1dda0e019e218b021f64987a74b110" name="a0f1dda0e019e218b021f64987a74b110"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0f1dda0e019e218b021f64987a74b110">&#9670;&#160;</a></span>GetStatistics()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::GetStatistics </td>
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<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_statistics.html">Statistics</a> *</td> <td class="paramname"><span class="paramname"><em>pStats</em></span></td><td>)</td>
<td> const</td>
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<p>Retrieves basic statistics of the virtual block that are fast to calculate. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">pStats</td><td>Statistics of the virtual block. </td></tr>
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</dd>
</dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a7b23fd2da6f0343095fb14b31395678b">&#9670;&#160;</a></span>IsEmpty()</h2>
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<td class="memname">BOOL D3D12MA::VirtualBlock::IsEmpty </td>
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<p>Returns true if the block is empty - contains 0 allocations. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ab96e34500b75a83a09d73b4585669114">&#9670;&#160;</a></span>SetAllocationPrivateData()</h2>
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<td class="memname">void D3D12MA::VirtualBlock::SetAllocationPrivateData </td>
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<td class="paramtype"><a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">VirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em>, </span></td>
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<td class="paramtype">void *</td> <td class="paramname"><span class="paramname"><em>pPrivateData</em></span>&#160;)</td>
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<p>Changes custom pointer for an allocation to a new value. </p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>D:/PROJECTS/D3D12 Memory Allocator/REPO/include/<a class="el" href="_d3_d12_mem_alloc_8h.html">D3D12MemAlloc.h</a></li>
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