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<!DOCTYPE html>
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<p class="caption"><span class="caption-text">Notes</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../../notes/autograd.html">Autograd mechanics</a><ul>
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<h1>Source code for torch.storage</h1><div class="highlight"><pre>
<span></span><span class="kn">import</span> <span class="nn">torch</span>
<span class="kn">from</span> <span class="nn">._utils</span> <span class="k">import</span> <span class="n">_type</span><span class="p">,</span> <span class="n">_cuda</span><span class="p">,</span> <span class="n">_range</span>
<span class="k">class</span> <span class="nc">_StorageBase</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="n">is_cuda</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">is_sparse</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">content</span> <span class="o">=</span> <span class="s1">' '</span> <span class="o">+</span> <span class="s1">'</span><span class="se">\n</span><span class="s1"> '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="p">[</span><span class="n">i</span><span class="p">])</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">_range</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">content</span> <span class="o">+</span> <span class="s1">'</span><span class="se">\n</span><span class="s1">[</span><span class="si">{}</span><span class="s1"> of size </span><span class="si">{}</span><span class="s1">]'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">torch</span><span class="o">.</span><span class="n">typename</span><span class="p">(</span><span class="bp">self</span><span class="p">),</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">__iter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">iter</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="k">lambda</span> <span class="n">i</span><span class="p">:</span> <span class="bp">self</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="n">_range</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">())))</span>
<span class="k">def</span> <span class="nf">__copy__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">clone</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">__deepcopy__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">memo</span><span class="p">):</span>
<span class="n">memo</span> <span class="o">=</span> <span class="n">memo</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="s1">'torch'</span><span class="p">,</span> <span class="p">{})</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cdata</span> <span class="ow">in</span> <span class="n">memo</span><span class="p">:</span>
<span class="k">return</span> <span class="n">memo</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_cdata</span><span class="p">]</span>
<span class="n">new_storage</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">clone</span><span class="p">()</span>
<span class="n">memo</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_cdata</span><span class="p">]</span> <span class="o">=</span> <span class="n">new_storage</span>
<span class="k">return</span> <span class="n">new_storage</span>
<span class="k">def</span> <span class="nf">__reduce__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">),</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">tolist</span><span class="p">(),)</span>
<span class="k">def</span> <span class="nf">clone</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Returns a copy of this storage"""</span>
<span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)(</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">())</span><span class="o">.</span><span class="n">copy_</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">tolist</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Returns a list containing the elements of this storage"""</span>
<span class="k">return</span> <span class="p">[</span><span class="n">v</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="bp">self</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">cpu</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Returns a CPU copy of this storage if it's not already on the CPU"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">getattr</span><span class="p">(</span><span class="n">torch</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">double</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to double type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.DoubleStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">float</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to float type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.FloatStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">half</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to half type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.HalfStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">long</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to long type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.LongStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">int</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to int type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.IntStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">short</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to short type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.ShortStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">char</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to char type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.CharStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">byte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Casts this storage to byte type"""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">(</span><span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__module__</span> <span class="o">+</span> <span class="s1">'.ByteStorage'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">pin_memory</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Copies the storage to pinned memory, if it's not already pinned."""</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_cuda</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"cannot pin '</span><span class="si">{0}</span><span class="s2">' only CPU memory can be pinned"</span>
<span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">()))</span>
<span class="kn">import</span> <span class="nn">torch.cuda</span>
<span class="n">allocator</span> <span class="o">=</span> <span class="n">torch</span><span class="o">.</span><span class="n">cuda</span><span class="o">.</span><span class="n">_host_allocator</span><span class="p">()</span>
<span class="k">return</span> <span class="nb">type</span><span class="p">(</span><span class="bp">self</span><span class="p">)(</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">(),</span> <span class="n">allocator</span><span class="o">=</span><span class="n">allocator</span><span class="p">)</span><span class="o">.</span><span class="n">copy_</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">share_memory_</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Moves the storage to shared memory.</span>
<span class="sd"> This is a no-op for storages already in shared memory and for CUDA</span>
<span class="sd"> storages, which do not need to be moved for sharing across processes.</span>
<span class="sd"> Storages in shared memory cannot be resized.</span>
<span class="sd"> Returns: self</span>
<span class="sd"> """</span>
<span class="kn">from</span> <span class="nn">torch.multiprocessing</span> <span class="k">import</span> <span class="n">get_sharing_strategy</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_cuda</span><span class="p">:</span>
<span class="k">pass</span> <span class="c1"># CUDA doesn't use POSIX shared memory</span>
<span class="k">elif</span> <span class="n">get_sharing_strategy</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'file_system'</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_share_filename_</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_share_fd_</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span>
<span class="n">_StorageBase</span><span class="o">.</span><span class="n">type</span> <span class="o">=</span> <span class="n">_type</span>
<span class="n">_StorageBase</span><span class="o">.</span><span class="n">cuda</span> <span class="o">=</span> <span class="n">_cuda</span>
</pre></div>
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