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<div id="projectname">Direct3D 12 Memory Allocator
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<li class="navelem"><a class="el" href="index.html">D3D12 Memory Allocator</a></li> </ul>
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<div class="title">Configuration </div> </div>
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<div class="textblock"><p>Please check file <code>D3D12MemAlloc.cpp</code> lines between "Configuration Begin" and "Configuration End" to find macros that you can define to change the behavior of the library, primarily for debugging purposes.</p>
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<h1><a class="anchor" id="custom_memory_allocator"></a>
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Custom CPU memory allocator</h1>
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<p>If you use custom allocator for CPU memory rather than default C++ operator <code>new</code> and <code>delete</code> or <code>malloc</code> and <code>free</code> functions, you can make this library using your allocator as well by filling structure <a class="el" 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" title="Custom callbacks to CPU memory allocation functions.">D3D12MA::ALLOCATION_CALLBACKS</a> and passing it as optional member <a class="el" href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#a773ecc1945eb47c20e06455c3759e4ef" title="Custom CPU memory allocation callbacks. Optional.">D3D12MA::ALLOCATOR_DESC::pAllocationCallbacks</a>. Functions pointed there will be used by the library to make any CPU-side allocations. Example:</p>
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<div class="fragment"><div class="line"><span class="preprocessor">#include <malloc.h></span></div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span>* CustomAllocate(<span class="keywordtype">size_t</span> Size, <span class="keywordtype">size_t</span> Alignment, <span class="keywordtype">void</span>* pUserData)</div>
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<div class="line">{</div>
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<div class="line"> <span class="keywordtype">void</span>* memory = _aligned_malloc(Size, Alignment);</div>
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<div class="line"> <span class="comment">// Your extra bookkeeping here...</span></div>
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<div class="line"> <span class="keywordflow">return</span> memory;</div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> CustomFree(<span class="keywordtype">void</span>* pMemory, <span class="keywordtype">void</span>* pUserData)</div>
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<div class="line">{</div>
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<div class="line"> <span class="comment">// Your extra bookkeeping here...</span></div>
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<div class="line"> _aligned_free(pMemory);</div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line">(...)</div>
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<div class="line"> </div>
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<div class="line"><a class="code" 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> allocationCallbacks = {};</div>
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<div class="line">allocationCallbacks.<a class="code" 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">pAllocate</a> = &CustomAllocate;</div>
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<div class="line">allocationCallbacks.<a class="code" 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">pFree</a> = &CustomFree;</div>
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<div class="line"> </div>
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<div class="line"><a class="code" 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> allocatorDesc = {};</div>
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<div class="line">allocatorDesc.<a class="code" href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#ada1bf21205065b3aa0284b5a9ee1cb3c">pDevice</a> = device;</div>
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<div class="line">allocatorDesc.<a class="code" href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#abf9a9f87f0ffea52816efd363c5fcd7b">pAdapter</a> = adapter;</div>
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<div class="line">allocatorDesc.<a class="code" href="struct_d3_d12_m_a_1_1_a_l_l_o_c_a_t_o_r___d_e_s_c.html#a773ecc1945eb47c20e06455c3759e4ef">pAllocationCallbacks</a> = &allocationCallbacks;</div>
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<div class="line"> </div>
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<div class="line"><a class="code" href="class_d3_d12_m_a_1_1_allocator.html">D3D12MA::Allocator</a>* allocator;</div>
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<div class="line">HRESULT hr = <a class="code" href="namespace_d3_d12_m_a.html#aa341b796fdffb16c976e659ccce80332">D3D12MA::CreateAllocator</a>(&allocatorDesc, &allocator);</div>
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<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:659</div></div>
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<div class="ttc" id="anamespace_d3_d12_m_a_html_aa341b796fdffb16c976e659ccce80332"><div class="ttname"><a href="namespace_d3_d12_m_a.html#aa341b796fdffb16c976e659ccce80332">D3D12MA::CreateAllocator</a></div><div class="ttdeci">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>
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<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:166</div></div>
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<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:170</div></div>
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<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:168</div></div>
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<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:540</div></div>
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<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:560</div></div>
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<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:566</div></div>
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<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:548</div></div>
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