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Added ALLOCATION_FLAG_CAN_ALIAS flag to prevent from using committed allocations on aliasing resources.

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Code by @medranSolus
This commit is contained in:
Adam Sawicki 2022-03-14 14:30:34 +01:00
parent d2639287ed
commit fbd11f01ae
14 changed files with 114 additions and 95 deletions
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9
docs/html/_d3_d12_mem_alloc_8h.html
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@ -178,11 +178,12 @@ Enumerations</h2></td></tr>
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eab374417c1f22a833ead268a6c21424e6">D3D12MA::ALLOCATION_FLAG_WITHIN_BUDGET</a> = 0x4
, <br />
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eafb0e2dacce691336e717550a1df72474">D3D12MA::ALLOCATION_FLAG_UPPER_ADDRESS</a> = 0x8
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_MEMORY</a> = 0x10
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_TIME</a> = 0x20
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eac30b62e36906b3c6e97b8b1d2ad8709d">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_OFFSET</a> = 0x40
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326">D3D12MA::ALLOCATION_FLAG_CAN_ALIAS</a> = 0x10
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_MEMORY</a> = 0x00010000
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_TIME</a> = 0x00020000
, <br />
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaaeed6a77f0fe7f33459df593cea44c35">D3D12MA::ALLOCATION_FLAG_STRATEGY_BEST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_MEMORY
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eac30b62e36906b3c6e97b8b1d2ad8709d">D3D12MA::ALLOCATION_FLAG_STRATEGY_MIN_OFFSET</a> = 0x0004000
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaaeed6a77f0fe7f33459df593cea44c35">D3D12MA::ALLOCATION_FLAG_STRATEGY_BEST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_MEMORY
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea103ff3115f3c2126779c25be435bf6aa">D3D12MA::ALLOCATION_FLAG_STRATEGY_FIRST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_TIME
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea3e29297ad3c6cf9d9bb61b6d27a13ab3">D3D12MA::ALLOCATION_FLAG_STRATEGY_MASK</a>
<br />

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@ -101,15 +101,15 @@ Custom CPU memory allocator</h1>
<div class="line"> </div>
<div class="line"><a class="code hl_class" href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a>* allocator;</div>
<div class="line">HRESULT hr = <a class="code hl_function" href="namespace_d3_d12_m_a.html#ab7a1cd1683986d75ce1488b0920f4cb0">D3D12MA::CreateAllocator</a>(&amp;allocatorDesc, &amp;allocator);</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocator_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a></div><div class="ttdoc">Represents main object of this library initialized for particular ID3D12Device.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1030</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocator_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a></div><div class="ttdoc">Represents main object of this library initialized for particular ID3D12Device.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1039</div></div>
<div class="ttc" id="anamespace_d3_d12_m_a_html_ab7a1cd1683986d75ce1488b0920f4cb0"><div class="ttname"><a href="namespace_d3_d12_m_a.html#ab7a1cd1683986d75ce1488b0920f4cb0">D3D12MA::CreateAllocator</a></div><div class="ttdeci">D3D12MA_API HRESULT CreateAllocator(const ALLOCATOR_DESC *pDesc, Allocator **ppAllocator)</div><div class="ttdoc">Creates new main D3D12MA::Allocator object and returns it through ppAllocator.</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s.html">D3D12MA::ALLOCATION_CALLBACKS</a></div><div class="ttdoc">Custom callbacks to CPU memory allocation functions.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:187</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s_html_a114e6c4d63d6b020e01f526a975d6849"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s.html#a114e6c4d63d6b020e01f526a975d6849">D3D12MA::ALLOCATION_CALLBACKS::pFree</a></div><div class="ttdeci">FREE_FUNC_PTR pFree</div><div class="ttdoc">Dellocation function.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:191</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s_html_af4d6436455728696fefd503869226436"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___c_a_l_l_b_a_c_k_s.html#af4d6436455728696fefd503869226436">D3D12MA::ALLOCATION_CALLBACKS::pAllocate</a></div><div class="ttdeci">ALLOCATE_FUNC_PTR pAllocate</div><div class="ttdoc">Allocation function.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:189</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html">D3D12MA::ALLOCATOR_DESC</a></div><div class="ttdoc">Parameters of created Allocator object. To be used with CreateAllocator().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:991</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_a773ecc1945eb47c20e06455c3759e4ef"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#a773ecc1945eb47c20e06455c3759e4ef">D3D12MA::ALLOCATOR_DESC::pAllocationCallbacks</a></div><div class="ttdeci">const ALLOCATION_CALLBACKS * pAllocationCallbacks</div><div class="ttdoc">Custom CPU memory allocation callbacks. Optional.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1011</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_abf9a9f87f0ffea52816efd363c5fcd7b"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#abf9a9f87f0ffea52816efd363c5fcd7b">D3D12MA::ALLOCATOR_DESC::pAdapter</a></div><div class="ttdeci">IDXGIAdapter * pAdapter</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1017</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_ada1bf21205065b3aa0284b5a9ee1cb3c"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#ada1bf21205065b3aa0284b5a9ee1cb3c">D3D12MA::ALLOCATOR_DESC::pDevice</a></div><div class="ttdeci">ID3D12Device * pDevice</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:999</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html">D3D12MA::ALLOCATOR_DESC</a></div><div class="ttdoc">Parameters of created Allocator object. To be used with CreateAllocator().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1000</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_a773ecc1945eb47c20e06455c3759e4ef"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#a773ecc1945eb47c20e06455c3759e4ef">D3D12MA::ALLOCATOR_DESC::pAllocationCallbacks</a></div><div class="ttdeci">const ALLOCATION_CALLBACKS * pAllocationCallbacks</div><div class="ttdoc">Custom CPU memory allocation callbacks. Optional.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1020</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_abf9a9f87f0ffea52816efd363c5fcd7b"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#abf9a9f87f0ffea52816efd363c5fcd7b">D3D12MA::ALLOCATOR_DESC::pAdapter</a></div><div class="ttdeci">IDXGIAdapter * pAdapter</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1026</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_ada1bf21205065b3aa0284b5a9ee1cb3c"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#ada1bf21205065b3aa0284b5a9ee1cb3c">D3D12MA::ALLOCATOR_DESC::pDevice</a></div><div class="ttdeci">ID3D12Device * pDevice</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1008</div></div>
</div><!-- fragment --><h1><a class="anchor" id="debug_margins"></a>
Debug margins</h1>
<p >By default, allocations are laid out in memory blocks next to each other if possible (considering required alignment returned by <code>ID3D12Device::GetResourceAllocationInfo</code>).</p>

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@ -158,11 +158,12 @@ Enumerations</h2></td></tr>
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eab374417c1f22a833ead268a6c21424e6">ALLOCATION_FLAG_WITHIN_BUDGET</a> = 0x4
, <br />
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eafb0e2dacce691336e717550a1df72474">ALLOCATION_FLAG_UPPER_ADDRESS</a> = 0x8
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae">ALLOCATION_FLAG_STRATEGY_MIN_MEMORY</a> = 0x10
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb">ALLOCATION_FLAG_STRATEGY_MIN_TIME</a> = 0x20
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eac30b62e36906b3c6e97b8b1d2ad8709d">ALLOCATION_FLAG_STRATEGY_MIN_OFFSET</a> = 0x40
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326">ALLOCATION_FLAG_CAN_ALIAS</a> = 0x10
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae">ALLOCATION_FLAG_STRATEGY_MIN_MEMORY</a> = 0x00010000
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb">ALLOCATION_FLAG_STRATEGY_MIN_TIME</a> = 0x00020000
, <br />
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaaeed6a77f0fe7f33459df593cea44c35">ALLOCATION_FLAG_STRATEGY_BEST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_MEMORY
&#160;&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eac30b62e36906b3c6e97b8b1d2ad8709d">ALLOCATION_FLAG_STRATEGY_MIN_OFFSET</a> = 0x0004000
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645eaaeed6a77f0fe7f33459df593cea44c35">ALLOCATION_FLAG_STRATEGY_BEST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_MEMORY
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea103ff3115f3c2126779c25be435bf6aa">ALLOCATION_FLAG_STRATEGY_FIRST_FIT</a> = ALLOCATION_FLAG_STRATEGY_MIN_TIME
, <a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea3e29297ad3c6cf9d9bb61b6d27a13ab3">ALLOCATION_FLAG_STRATEGY_MASK</a>
<br />
@ -306,6 +307,9 @@ Functions</h2></td></tr>
<tr><td class="fieldname"><a id="abbad31a7e0b3d09d77f3fb704b77645eafb0e2dacce691336e717550a1df72474" name="abbad31a7e0b3d09d77f3fb704b77645eafb0e2dacce691336e717550a1df72474"></a>ALLOCATION_FLAG_UPPER_ADDRESS&#160;</td><td class="fielddoc"><p ><a class="el" href="class_d3_d12_m_a_1_1_allocation.html" title="Represents single memory allocation.">Allocation</a> will be created from upper stack in a double stack pool.</p>
<p >This flag is only allowed for custom pools created with <a class="el" href="namespace_d3_d12_m_a.html#a919d8545365d6b7209a964f2b99936d1aa37a0103f511954ea42a1d0bba286b6a" title="Enables alternative, linear allocation algorithm in this pool.">POOL_FLAG_ALGORITHM_LINEAR</a> flag. </p>
</td></tr>
<tr><td class="fieldname"><a id="abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326" name="abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326"></a>ALLOCATION_FLAG_CAN_ALIAS&#160;</td><td class="fielddoc"><p >Set this flag if the allocated memory will have aliasing resources.</p>
<p >Use this when calling <a class="el" href="class_d3_d12_m_a_1_1_allocator.html#aa37d6b9fe8ea0864f7a35b9d68e8345a" title="Allocates memory and creates a D3D12 resource (buffer or texture). This is the main allocation functi...">D3D12MA::Allocator::CreateResource()</a> and similar to guarantee creation of explicit heap for desired allocation and prevent it from using <code>CreateCommittedResource</code>, so that new allocation object will always have <code>allocation-&gt;GetHeap() != NULL</code>. </p>
</td></tr>
<tr><td class="fieldname"><a id="abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae" name="abbad31a7e0b3d09d77f3fb704b77645ea4b4fa95bb0daf6a80add7fb292aa63ae"></a>ALLOCATION_FLAG_STRATEGY_MIN_MEMORY&#160;</td><td class="fielddoc"><p ><a class="el" href="class_d3_d12_m_a_1_1_allocation.html" title="Represents single memory allocation.">Allocation</a> strategy that chooses smallest possible free range for the allocation to minimize memory usage and fragmentation, possibly at the expense of allocation time. </p>
</td></tr>
<tr><td class="fieldname"><a id="abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb" name="abbad31a7e0b3d09d77f3fb704b77645eaa3ded8847563c24b4522af0586dbd2cb"></a>ALLOCATION_FLAG_STRATEGY_MIN_TIME&#160;</td><td class="fielddoc"><p ><a class="el" href="class_d3_d12_m_a_1_1_allocation.html" title="Represents single memory allocation.">Allocation</a> strategy that chooses first suitable free range for the allocation - not necessarily in terms of the smallest offset but the one that is easiest and fastest to find to minimize allocation time, possibly at the expense of allocation quality. </p>

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@ -66,6 +66,7 @@ $(function() {
<h3><a id="index_a" name="index_a"></a>- a -</h3><ul>
<li>ALLOCATE_FUNC_PTR&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#a8bcc49af3c53bbe04dbcb41c093dce58">D3D12MA</a></li>
<li>ALLOCATION_FLAG_CAN_ALIAS&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326">D3D12MA</a></li>
<li>ALLOCATION_FLAG_COMMITTED&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea661a5472dba3dcecc5a2cc92afd25675">D3D12MA</a></li>
<li>ALLOCATION_FLAG_NEVER_ALLOCATE&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea9a52c6ae694eadcd20896091e77c0628">D3D12MA</a></li>
<li>ALLOCATION_FLAG_NONE&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea0bf578b096d6ea73cea86b031541733e">D3D12MA</a></li>

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@ -65,6 +65,7 @@ $(function() {
&#160;
<h3><a id="index_a" name="index_a"></a>- a -</h3><ul>
<li>ALLOCATION_FLAG_CAN_ALIAS&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea4d6808f27de6d0ae57014ec1f4d54326">D3D12MA</a></li>
<li>ALLOCATION_FLAG_COMMITTED&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea661a5472dba3dcecc5a2cc92afd25675">D3D12MA</a></li>
<li>ALLOCATION_FLAG_NEVER_ALLOCATE&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea9a52c6ae694eadcd20896091e77c0628">D3D12MA</a></li>
<li>ALLOCATION_FLAG_NONE&#160;:&#160;<a class="el" href="namespace_d3_d12_m_a.html#abbad31a7e0b3d09d77f3fb704b77645ea0bf578b096d6ea73cea86b031541733e">D3D12MA</a></li>

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@ -90,11 +90,11 @@ Project setup and initialization</h1>
<div class="line"> </div>
<div class="line"><a class="code hl_class" href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a>* allocator;</div>
<div class="line">HRESULT hr = <a class="code hl_function" href="namespace_d3_d12_m_a.html#ab7a1cd1683986d75ce1488b0920f4cb0">D3D12MA::CreateAllocator</a>(&amp;allocatorDesc, &amp;allocator);</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocator_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a></div><div class="ttdoc">Represents main object of this library initialized for particular ID3D12Device.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1030</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocator_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a></div><div class="ttdoc">Represents main object of this library initialized for particular ID3D12Device.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1039</div></div>
<div class="ttc" id="anamespace_d3_d12_m_a_html_ab7a1cd1683986d75ce1488b0920f4cb0"><div class="ttname"><a href="namespace_d3_d12_m_a.html#ab7a1cd1683986d75ce1488b0920f4cb0">D3D12MA::CreateAllocator</a></div><div class="ttdeci">D3D12MA_API HRESULT CreateAllocator(const ALLOCATOR_DESC *pDesc, Allocator **ppAllocator)</div><div class="ttdoc">Creates new main D3D12MA::Allocator object and returns it through ppAllocator.</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html">D3D12MA::ALLOCATOR_DESC</a></div><div class="ttdoc">Parameters of created Allocator object. To be used with CreateAllocator().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:991</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_abf9a9f87f0ffea52816efd363c5fcd7b"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#abf9a9f87f0ffea52816efd363c5fcd7b">D3D12MA::ALLOCATOR_DESC::pAdapter</a></div><div class="ttdeci">IDXGIAdapter * pAdapter</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1017</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_ada1bf21205065b3aa0284b5a9ee1cb3c"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#ada1bf21205065b3aa0284b5a9ee1cb3c">D3D12MA::ALLOCATOR_DESC::pDevice</a></div><div class="ttdeci">ID3D12Device * pDevice</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:999</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html">D3D12MA::ALLOCATOR_DESC</a></div><div class="ttdoc">Parameters of created Allocator object. To be used with CreateAllocator().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1000</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_abf9a9f87f0ffea52816efd363c5fcd7b"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#abf9a9f87f0ffea52816efd363c5fcd7b">D3D12MA::ALLOCATOR_DESC::pAdapter</a></div><div class="ttdeci">IDXGIAdapter * pAdapter</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1026</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c_html_ada1bf21205065b3aa0284b5a9ee1cb3c"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#ada1bf21205065b3aa0284b5a9ee1cb3c">D3D12MA::ALLOCATOR_DESC::pDevice</a></div><div class="ttdeci">ID3D12Device * pDevice</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1008</div></div>
</div><!-- fragment --><p >(5.) Right before destroying the D3D12 device, destroy the allocator object.</p>
<p >Objects of this library must be destroyed by calling <code>Release</code> method. They are somewhat compatible with COM: they implement <code>IUnknown</code> interface with its virtual methods: <code>AddRef</code>, <code>Release</code>, <code>QueryInterface</code>, and they are reference-counted internally. You can use smart pointers designed for COM with objects of this library - e.g. <code>CComPtr</code> or <code>Microsoft::WRL::ComPtr</code>. The reference counter is thread-safe. <code>QueryInterface</code> method supports only <code>IUnknown</code>, as classes of this library don't define their own GUIDs.</p>
<div class="fragment"><div class="line">allocator-&gt;Release();</div>
@ -128,10 +128,10 @@ Creating resources</h1>
<div class="line"> NULL,</div>
<div class="line"> &amp;allocation,</div>
<div class="line"> IID_PPV_ARGS(&amp;resource));</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocation_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocation.html">D3D12MA::Allocation</a></div><div class="ttdoc">Represents single memory allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:455</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocation_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocation.html">D3D12MA::Allocation</a></div><div class="ttdoc">Represents single memory allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:464</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocator_html_aa37d6b9fe8ea0864f7a35b9d68e8345a"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocator.html#aa37d6b9fe8ea0864f7a35b9d68e8345a">D3D12MA::Allocator::CreateResource</a></div><div class="ttdeci">HRESULT CreateResource(const ALLOCATION_DESC *pAllocDesc, const D3D12_RESOURCE_DESC *pResourceDesc, D3D12_RESOURCE_STATES InitialResourceState, const D3D12_CLEAR_VALUE *pOptimizedClearValue, Allocation **ppAllocation, REFIID riidResource, void **ppvResource)</div><div class="ttdoc">Allocates memory and creates a D3D12 resource (buffer or texture). This is the main allocation functi...</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">D3D12MA::ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::Allocation object. To be used with Allocator::CreateResource.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:271</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_aa46b3c0456e5a23edef3328607ebf4d7"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#aa46b3c0456e5a23edef3328607ebf4d7">D3D12MA::ALLOCATION_DESC::HeapType</a></div><div class="ttdeci">D3D12_HEAP_TYPE HeapType</div><div class="ttdoc">The type of memory heap where the new allocation should be placed.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:280</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">D3D12MA::ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::Allocation object. To be used with Allocator::CreateResource.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:280</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_aa46b3c0456e5a23edef3328607ebf4d7"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#aa46b3c0456e5a23edef3328607ebf4d7">D3D12MA::ALLOCATION_DESC::HeapType</a></div><div class="ttdeci">D3D12_HEAP_TYPE HeapType</div><div class="ttdoc">The type of memory heap where the new allocation should be placed.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:289</div></div>
</div><!-- fragment --><p >You need to remember both resource and allocation objects and destroy them separately when no longer needed.</p>
<div class="fragment"><div class="line">allocation-&gt;Release();</div>
<div class="line">resource-&gt;Release();</div>

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@ -144,11 +144,11 @@ $(function() {
<div class="line">res2-&gt;Release();</div>
<div class="line">res1-&gt;Release();</div>
<div class="line">alloc-&gt;Release();</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocation_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocation.html">D3D12MA::Allocation</a></div><div class="ttdoc">Represents single memory allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:455</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocation_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocation.html">D3D12MA::Allocation</a></div><div class="ttdoc">Represents single memory allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:464</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_allocation_html_adca8d5a82bed492fe7265fcda6e53da2"><div class="ttname"><a href="class_d3_d12_m_a_1_1_allocation.html#adca8d5a82bed492fe7265fcda6e53da2">D3D12MA::Allocation::GetHeap</a></div><div class="ttdeci">ID3D12Heap * GetHeap() const</div><div class="ttdoc">Returns memory heap that the resource is created in.</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">D3D12MA::ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::Allocation object. To be used with Allocator::CreateResource.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:271</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_a97878838f976b2d1e6b1a76881035690"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#a97878838f976b2d1e6b1a76881035690">D3D12MA::ALLOCATION_DESC::ExtraHeapFlags</a></div><div class="ttdeci">D3D12_HEAP_FLAGS ExtraHeapFlags</div><div class="ttdoc">Additional heap flags to be used when allocating memory.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:296</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_aa46b3c0456e5a23edef3328607ebf4d7"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#aa46b3c0456e5a23edef3328607ebf4d7">D3D12MA::ALLOCATION_DESC::HeapType</a></div><div class="ttdeci">D3D12_HEAP_TYPE HeapType</div><div class="ttdoc">The type of memory heap where the new allocation should be placed.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:280</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html">D3D12MA::ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::Allocation object. To be used with Allocator::CreateResource.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:280</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_a97878838f976b2d1e6b1a76881035690"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#a97878838f976b2d1e6b1a76881035690">D3D12MA::ALLOCATION_DESC::ExtraHeapFlags</a></div><div class="ttdeci">D3D12_HEAP_FLAGS ExtraHeapFlags</div><div class="ttdoc">Additional heap flags to be used when allocating memory.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:305</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c_html_aa46b3c0456e5a23edef3328607ebf4d7"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_i_o_n___d_e_s_c.html#aa46b3c0456e5a23edef3328607ebf4d7">D3D12MA::ALLOCATION_DESC::HeapType</a></div><div class="ttdeci">D3D12_HEAP_TYPE HeapType</div><div class="ttdoc">The type of memory heap where the new allocation should be placed.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:289</div></div>
</div><!-- fragment --><p >Remember that using resouces that alias in memory requires proper synchronization. You need to issue a special barrier of type <code>D3D12_RESOURCE_BARRIER_TYPE_ALIASING</code>. You also need to treat a resource after aliasing as uninitialized - containing garbage data. For example, if you use <code>res1</code> and then want to use <code>res2</code>, you need to first initialize <code>res2</code> using either Clear, Discard, or Copy to the entire resource.</p>
<p >Additional considerations:</p>
<ul>

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docs/html/search/enumvalues_0.js
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@ -1,17 +1,18 @@
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6
docs/html/statistics.html
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@ -85,9 +85,9 @@ Numeric statistics</h1>
<div class="line">printf(<span class="stringliteral">&quot;D3D12 reports total usage %llu B with budget %llu B.\n&quot;</span>,</div>
<div class="line"> localBudget.<a class="code hl_variable" href="struct_d3_d12_m_a_1_1_budget.html#a77a8c9e32d6602f95b7d1c285cddd253">UsageBytes</a>,</div>
<div class="line"> localBudget.<a class="code hl_variable" href="struct_d3_d12_m_a_1_1_budget.html#a326515f08d89ee2e31dcfdd5c1e8ac71">BudgetBytes</a>);</div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html">D3D12MA::Budget</a></div><div class="ttdoc">Statistics of current memory usage and available budget for a specific memory segment group.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:406</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html_a326515f08d89ee2e31dcfdd5c1e8ac71"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html#a326515f08d89ee2e31dcfdd5c1e8ac71">D3D12MA::Budget::BudgetBytes</a></div><div class="ttdeci">UINT64 BudgetBytes</div><div class="ttdoc">Estimated amount of memory available to the program.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:429</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html_a77a8c9e32d6602f95b7d1c285cddd253"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html#a77a8c9e32d6602f95b7d1c285cddd253">D3D12MA::Budget::UsageBytes</a></div><div class="ttdeci">UINT64 UsageBytes</div><div class="ttdoc">Estimated current memory usage of the program.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:418</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html">D3D12MA::Budget</a></div><div class="ttdoc">Statistics of current memory usage and available budget for a specific memory segment group.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:415</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html_a326515f08d89ee2e31dcfdd5c1e8ac71"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html#a326515f08d89ee2e31dcfdd5c1e8ac71">D3D12MA::Budget::BudgetBytes</a></div><div class="ttdeci">UINT64 BudgetBytes</div><div class="ttdoc">Estimated amount of memory available to the program.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:438</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_budget_html_a77a8c9e32d6602f95b7d1c285cddd253"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_budget.html#a77a8c9e32d6602f95b7d1c285cddd253">D3D12MA::Budget::UsageBytes</a></div><div class="ttdeci">UINT64 UsageBytes</div><div class="ttdoc">Estimated current memory usage of the program.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:427</div></div>
</div><!-- fragment --><p >You can query for more detailed statistics per heap type, memory segment group, and totals, including minimum and maximum allocation size and unused range size, by calling function <a class="el" href="class_d3_d12_m_a_1_1_allocator.html#a99db00df909963573a976c203b107d22" title="Retrieves statistics from current state of the allocator.">D3D12MA::Allocator::CalculateStatistics()</a> and inspecting structure <a class="el" href="struct_d3_d12_m_a_1_1_total_statistics.html" title="General statistics from current state of the allocator - total memory usage across all memory heaps a...">D3D12MA::TotalStatistics</a>. This function is slower though, as it has to traverse all the internal data structures, so it should be used only for debugging purposes.</p>
<p >You can query for statistics of a custom pool using function <a class="el" href="class_d3_d12_m_a_1_1_pool.html#aa9d849dc4667314b2a53eddf02f5af91" title="Retrieves basic statistics of the custom pool that are fast to calculate.">D3D12MA::Pool::GetStatistics()</a> or <a class="el" href="class_d3_d12_m_a_1_1_pool.html#ad07999ac5dc8f0c63187afd45d551910" title="Retrieves detailed statistics of the custom pool that are slower to calculate.">D3D12MA::Pool::CalculateStatistics()</a>.</p>
<p >You can query for information about a specific allocation using functions of the <a class="el" href="class_d3_d12_m_a_1_1_allocation.html" title="Represents single memory allocation.">D3D12MA::Allocation</a> class, e.g. <code>GetSize()</code>, <code>GetOffset()</code>, <code>GetHeap()</code>.</p>

20
docs/html/virtual_allocator.html
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@ -83,10 +83,10 @@ Creating virtual block</h1>
<div class="line"> </div>
<div class="line"><a class="code hl_class" href="class_d3_d12_m_a_1_1_virtual_block.html">D3D12MA::VirtualBlock</a> *block;</div>
<div class="line">HRESULT hr = <a class="code hl_function" href="namespace_d3_d12_m_a.html#ab024647ae85ee63e2fa2c1c4beac6d98">CreateVirtualBlock</a>(&amp;blockDesc, &amp;block);</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_virtual_block_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_virtual_block.html">D3D12MA::VirtualBlock</a></div><div class="ttdoc">Represents pure allocation algorithm and a data structure with allocations in some memory block,...</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1380</div></div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_virtual_block_html"><div class="ttname"><a href="class_d3_d12_m_a_1_1_virtual_block.html">D3D12MA::VirtualBlock</a></div><div class="ttdoc">Represents pure allocation algorithm and a data structure with allocations in some memory block,...</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1389</div></div>
<div class="ttc" id="anamespace_d3_d12_m_a_html_ab024647ae85ee63e2fa2c1c4beac6d98"><div class="ttname"><a href="namespace_d3_d12_m_a.html#ab024647ae85ee63e2fa2c1c4beac6d98">D3D12MA::CreateVirtualBlock</a></div><div class="ttdeci">D3D12MA_API HRESULT CreateVirtualBlock(const VIRTUAL_BLOCK_DESC *pDesc, VirtualBlock **ppVirtualBlock)</div><div class="ttdoc">Creates new D3D12MA::VirtualBlock object and returns it through ppVirtualBlock.</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___b_l_o_c_k___d_e_s_c_html"><div class="ttname"><a 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">D3D12MA::VIRTUAL_BLOCK_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::VirtualBlock object to be passed to CreateVirtualBlock().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1286</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___b_l_o_c_k___d_e_s_c_html_ac56491679f276a5a9956ed99bc4654e4"><div class="ttname"><a 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#ac56491679f276a5a9956ed99bc4654e4">D3D12MA::VIRTUAL_BLOCK_DESC::Size</a></div><div class="ttdeci">UINT64 Size</div><div class="ttdoc">Total size of the block.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1294</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___b_l_o_c_k___d_e_s_c_html"><div class="ttname"><a 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">D3D12MA::VIRTUAL_BLOCK_DESC</a></div><div class="ttdoc">Parameters of created D3D12MA::VirtualBlock object to be passed to CreateVirtualBlock().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1295</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_v_i_r_t_u_a_l___b_l_o_c_k___d_e_s_c_html_ac56491679f276a5a9956ed99bc4654e4"><div class="ttname"><a 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#ac56491679f276a5a9956ed99bc4654e4">D3D12MA::VIRTUAL_BLOCK_DESC::Size</a></div><div class="ttdeci">UINT64 Size</div><div class="ttdoc">Total size of the block.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1303</div></div>
</div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_making_virtual_allocations"></a>
Making virtual allocations</h1>
<p ><a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html" title="Represents pure allocation algorithm and a data structure with allocations in some memory block,...">D3D12MA::VirtualBlock</a> object contains internal data structure that keeps track of free and occupied regions using the same code as the main D3D12 memory allocator. A single allocation is identified by a lightweight structure <a class="el" href="struct_d3_d12_m_a_1_1_virtual_allocation.html" title="Represents single memory allocation done inside VirtualBlock.">D3D12MA::VirtualAllocation</a>. You will also likely want to know the offset at which the allocation was made in the block.</p>
@ -111,9 +111,9 @@ Making virtual allocations</h1>
<div class="line"> <span class="comment">// Allocation failed - no space for it could be found. Handle this error!</span></div>
<div class="line">}</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_virtual_block_html_a9281daf76e888ea1bd5247d5732e8179"><div class="ttname"><a href="class_d3_d12_m_a_1_1_virtual_block.html#a9281daf76e888ea1bd5247d5732e8179">D3D12MA::VirtualBlock::Allocate</a></div><div class="ttdeci">HRESULT Allocate(const VIRTUAL_ALLOCATION_DESC *pDesc, VirtualAllocation *pAllocation, UINT64 *pOffset)</div><div class="ttdoc">Creates new allocation.</div></div>
<div class="ttc" id="astruct_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"><div class="ttname"><a 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">D3D12MA::VIRTUAL_ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created virtual allocation to be passed to VirtualBlock::Allocate().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1331</div></div>
<div class="ttc" id="astruct_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_a976b649e45abdd0769da0d79acde4bac"><div class="ttname"><a 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#a976b649e45abdd0769da0d79acde4bac">D3D12MA::VIRTUAL_ALLOCATION_DESC::Size</a></div><div class="ttdeci">UINT64 Size</div><div class="ttdoc">Size of the allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1338</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_virtual_allocation_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_virtual_allocation.html">D3D12MA::VirtualAllocation</a></div><div class="ttdoc">Represents single memory allocation done inside VirtualBlock.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:435</div></div>
<div class="ttc" id="astruct_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"><div class="ttname"><a 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">D3D12MA::VIRTUAL_ALLOCATION_DESC</a></div><div class="ttdoc">Parameters of created virtual allocation to be passed to VirtualBlock::Allocate().</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1340</div></div>
<div class="ttc" id="astruct_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_a976b649e45abdd0769da0d79acde4bac"><div class="ttname"><a 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#a976b649e45abdd0769da0d79acde4bac">D3D12MA::VIRTUAL_ALLOCATION_DESC::Size</a></div><div class="ttdeci">UINT64 Size</div><div class="ttdoc">Size of the allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1347</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_virtual_allocation_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_virtual_allocation.html">D3D12MA::VirtualAllocation</a></div><div class="ttdoc">Represents single memory allocation done inside VirtualBlock.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:444</div></div>
</div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_deallocation"></a>
Deallocation</h1>
<p >When no longer needed, an allocation can be freed by calling <a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html#aab44e46bd122054c894fc84740f1e8fb" title="Frees the allocation.">D3D12MA::VirtualBlock::FreeAllocation</a>.</p>
@ -150,7 +150,7 @@ Alignment and units</h1>
<div class="line"><a class="code hl_struct" href="struct_d3_d12_m_a_1_1_virtual_allocation.html">D3D12MA::VirtualAllocation</a> alloc;</div>
<div class="line">UINT64 allocOffset;</div>
<div class="line">hr = block-&gt;<a class="code hl_function" href="class_d3_d12_m_a_1_1_virtual_block.html#a9281daf76e888ea1bd5247d5732e8179">Allocate</a>(&amp;allocDesc, &amp;alloc, &amp;allocOffset);</div>
<div class="ttc" id="astruct_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_aaa95e62f2f399339a09dcbb312a42de0"><div class="ttname"><a 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#aaa95e62f2f399339a09dcbb312a42de0">D3D12MA::VIRTUAL_ALLOCATION_DESC::Alignment</a></div><div class="ttdeci">UINT64 Alignment</div><div class="ttdoc">Required alignment of the allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1343</div></div>
<div class="ttc" id="astruct_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_aaa95e62f2f399339a09dcbb312a42de0"><div class="ttname"><a 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#aaa95e62f2f399339a09dcbb312a42de0">D3D12MA::VIRTUAL_ALLOCATION_DESC::Alignment</a></div><div class="ttdeci">UINT64 Alignment</div><div class="ttdoc">Required alignment of the allocation.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:1352</div></div>
</div><!-- fragment --><p >Alignments of different allocations made from one block may vary. However, if all alignments and sizes are always multiply of some size e.g. 4 B or <code>sizeof(MyDataStruct)</code>, you can express all sizes, alignments, and offsets in multiples of that size instead of individual bytes. It might be more convenient, but you need to make sure to use this new unit consistently in all the places:</p>
<ul>
<li><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#ac56491679f276a5a9956ed99bc4654e4" title="Total size of the block.">D3D12MA::VIRTUAL_BLOCK_DESC::Size</a></li>
@ -165,9 +165,9 @@ Statistics</h1>
<div class="line">printf(<span class="stringliteral">&quot;My virtual block has %llu bytes used by %u virtual allocations\n&quot;</span>,</div>
<div class="line"> stats.<a class="code hl_variable" href="struct_d3_d12_m_a_1_1_statistics.html#a53cfe3d241124b5a8e8058871a4b50e8">AllocationBytes</a>, stats.<a class="code hl_variable" href="struct_d3_d12_m_a_1_1_statistics.html#aef88ac53531db43a8888ad2be4a06c68">AllocationCount</a>);</div>
<div class="ttc" id="aclass_d3_d12_m_a_1_1_virtual_block_html_a0f1dda0e019e218b021f64987a74b110"><div class="ttname"><a href="class_d3_d12_m_a_1_1_virtual_block.html#a0f1dda0e019e218b021f64987a74b110">D3D12MA::VirtualBlock::GetStatistics</a></div><div class="ttdeci">void GetStatistics(Statistics *pStats) const</div><div class="ttdoc">Retrieves basic statistics of the virtual block that are fast to calculate.</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html">D3D12MA::Statistics</a></div><div class="ttdoc">Calculated statistics of memory usage e.g. in a specific memory heap type, memory segment group,...</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:314</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html_a53cfe3d241124b5a8e8058871a4b50e8"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html#a53cfe3d241124b5a8e8058871a4b50e8">D3D12MA::Statistics::AllocationBytes</a></div><div class="ttdeci">UINT64 AllocationBytes</div><div class="ttdoc">Total number of bytes occupied by all D3D12MA::Allocation objects.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:332</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html_aef88ac53531db43a8888ad2be4a06c68"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html#aef88ac53531db43a8888ad2be4a06c68">D3D12MA::Statistics::AllocationCount</a></div><div class="ttdeci">UINT AllocationCount</div><div class="ttdoc">Number of D3D12MA::Allocation objects allocated.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:322</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html">D3D12MA::Statistics</a></div><div class="ttdoc">Calculated statistics of memory usage e.g. in a specific memory heap type, memory segment group,...</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:323</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html_a53cfe3d241124b5a8e8058871a4b50e8"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html#a53cfe3d241124b5a8e8058871a4b50e8">D3D12MA::Statistics::AllocationBytes</a></div><div class="ttdeci">UINT64 AllocationBytes</div><div class="ttdoc">Total number of bytes occupied by all D3D12MA::Allocation objects.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:341</div></div>
<div class="ttc" id="astruct_d3_d12_m_a_1_1_statistics_html_aef88ac53531db43a8888ad2be4a06c68"><div class="ttname"><a href="struct_d3_d12_m_a_1_1_statistics.html#aef88ac53531db43a8888ad2be4a06c68">D3D12MA::Statistics::AllocationCount</a></div><div class="ttdeci">UINT AllocationCount</div><div class="ttdoc">Number of D3D12MA::Allocation objects allocated.</div><div class="ttdef"><b>Definition:</b> D3D12MemAlloc.h:331</div></div>
</div><!-- fragment --><p >More detailed statistics can be obtained using function <a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html#a614a82247ce6cf29c38895e16eb971d9" title="Retrieves detailed statistics of the virtual block that are slower to calculate.">D3D12MA::VirtualBlock::CalculateStatistics()</a>, but they are slower to calculate.</p>
<p >You can also request a full list of allocations and free regions as a string in JSON format by calling <a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html#a828a27070bfa762cae796d4c8f2ef703" title="Builds and returns statistics as a string in JSON format, including the list of allocations with thei...">D3D12MA::VirtualBlock::BuildStatsString</a>. Returned string must be later freed using <a class="el" href="class_d3_d12_m_a_1_1_virtual_block.html#a6f78ddaa7da194e239089e52093e68a9" title="Frees memory of a string returned from VirtualBlock::BuildStatsString.">D3D12MA::VirtualBlock::FreeStatsString</a>. The format of this string may differ from the one returned by the main D3D12 allocator, but it is similar.</p>
<h1><a class="anchor" id="virtual_allocator_additional_considerations"></a>

15
include/D3D12MemAlloc.h
View File

@ -237,22 +237,31 @@ enum ALLOCATION_FLAGS
*/
ALLOCATION_FLAG_UPPER_ADDRESS = 0x8,
/** Set this flag if the allocated memory will have aliasing resources.
Use this when calling D3D12MA::Allocator::CreateResource() and similar to
guarantee creation of explicit heap for desired allocation and prevent it from using `CreateCommittedResource`,
so that new allocation object will always have `allocation->GetHeap() != NULL`.
*/
ALLOCATION_FLAG_CAN_ALIAS = 0x10,
/** Allocation strategy that chooses smallest possible free range for the allocation
to minimize memory usage and fragmentation, possibly at the expense of allocation time.
*/
ALLOCATION_FLAG_STRATEGY_MIN_MEMORY = 0x10,
ALLOCATION_FLAG_STRATEGY_MIN_MEMORY = 0x00010000,
/** Allocation strategy that chooses first suitable free range for the allocation -
not necessarily in terms of the smallest offset but the one that is easiest and fastest to find
to minimize allocation time, possibly at the expense of allocation quality.
*/
ALLOCATION_FLAG_STRATEGY_MIN_TIME = 0x20,
ALLOCATION_FLAG_STRATEGY_MIN_TIME = 0x00020000,
/** Allocation strategy that chooses always the lowest offset in available space.
This is not the most efficient strategy but achieves highly packed data.
Used internally by defragmentation, not recomended in typical usage.
*/
ALLOCATION_FLAG_STRATEGY_MIN_OFFSET = 0x40,
ALLOCATION_FLAG_STRATEGY_MIN_OFFSET = 0x0004000,
/// Alias to #ALLOCATION_FLAG_STRATEGY_MIN_MEMORY.
ALLOCATION_FLAG_STRATEGY_BEST_FIT = ALLOCATION_FLAG_STRATEGY_MIN_MEMORY,

3
src/D3D12MemAlloc.cpp
View File

@ -7516,7 +7516,7 @@ HRESULT AllocatorPimpl::CalcAllocationParams(const ALLOCATION_DESC& allocDesc, U
{
outBlockVector = NULL;
}
if ((allocDesc.Flags & ALLOCATION_FLAG_NEVER_ALLOCATE) != 0)
if ((allocDesc.Flags & (ALLOCATION_FLAG_NEVER_ALLOCATE | ALLOCATION_FLAG_CAN_ALIAS)) != 0)
{
outCommittedAllocationParams.m_List = NULL;
}
@ -8519,7 +8519,6 @@ HRESULT BlockVector::CreateBlock(
}
#endif // _D3D12MA_BLOCK_VECTOR_FUNCTIONS
#ifndef _D3D12MA_DEFRAGMENTATION_CONTEXT_PIMPL_FUNCTIONS
DefragmentationContextPimpl::DefragmentationContextPimpl(
AllocatorPimpl* hAllocator,

26
src/Tests.cpp
View File

@ -3764,16 +3764,18 @@ void TestDefragmentationIncrementalComplex(const TestContext& ctx)
std::vector<ComPtr<D3D12MA::Allocation>> additionalAllocations;
additionalAllocations.reserve(maxAdditionalAllocations);
#define MakeAdditionalAllocation() \
if (additionalAllocations.size() < maxAdditionalAllocations) \
{ \
resDesc.Width = AlignUp(bufSizeMin + rand.Generate() % (bufSizeMax - bufSizeMin), 16ull); \
ComPtr<D3D12MA::Allocation> alloc; \
CHECK_HR(ctx.allocator->CreateResource(&allocDesc, &resDesc, D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER, \
nullptr, &alloc, IID_NULL, nullptr)); \
alloc->SetPrivateData((void*)D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER); \
additionalAllocations.emplace_back(std::move(alloc)); \
const auto makeAdditionalAllocation = [&]()
{
if (additionalAllocations.size() < maxAdditionalAllocations)
{
resDesc.Width = AlignUp(bufSizeMin + rand.Generate() % (bufSizeMax - bufSizeMin), 16ull);
ComPtr<D3D12MA::Allocation> alloc;
CHECK_HR(ctx.allocator->CreateResource(&allocDesc, &resDesc, D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER,
nullptr, &alloc, IID_NULL, nullptr));
alloc->SetPrivateData((void*)D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER);
additionalAllocations.emplace_back(std::move(alloc));
}
};
// Defragment using GPU only.
{
@ -3783,13 +3785,13 @@ void TestDefragmentationIncrementalComplex(const TestContext& ctx)
ComPtr<D3D12MA::DefragmentationContext> defragCtx;
ctx.allocator->BeginDefragmentation(&defragDesc, &defragCtx);
MakeAdditionalAllocation();
makeAdditionalAllocation();
HRESULT hr = S_OK;
D3D12MA::DEFRAGMENTATION_PASS_MOVE_INFO pass = {};
while ((hr = defragCtx->BeginPass(&pass)) == S_FALSE)
{
MakeAdditionalAllocation();
makeAdditionalAllocation();
// Ignore data outside of test
for (UINT32 i = 0; i < pass.MoveCount; ++i)
@ -3805,7 +3807,7 @@ void TestDefragmentationIncrementalComplex(const TestContext& ctx)
ProcessDefragmentationPass(ctx, pass);
MakeAdditionalAllocation();
makeAdditionalAllocation();
if ((hr = defragCtx->EndPass(&pass)) == S_OK)
break;