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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>ocl</a>::<wbr><a href='index.html'>builders</a>::<wbr><a class="struct" href=''>BufferCmd</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>−</span>]
</a>
</span><a class='srclink' href='../../src/ocl/standard/buffer.rs.html#135-144' title='goto source code'>[src]</a></span></h1>
<pre class='rust struct'><div class="docblock attributes">#[must_use = "commands do nothing unless enqueued"]
</div>pub struct BufferCmd<'c, T> <span class="where fmt-newline">where<br> T: 'c, </span> { /* fields omitted */ }</pre><div class='docblock'><p>A buffer command builder used to enqueue reads, writes, fills, and copies.</p>
<p>Create one by using <code>Buffer::cmd</code> or with shortcut methods such as
<code>Buffer::read</code> and <code>Buffer::write</code>.</p>
<h2 id="examples" class="section-header"><a href="#examples">Examples</a></h2>
<pre><code class="language-text">// Copies one buffer to another:
src_buffer.cmd().copy(&dst_buffer, 0, dst_buffer.len()).enq().unwrap();
// Writes from a vector to an buffer, waiting on an event:
buffer.write(&src_vec).ewait(&event).enq().unwrap();
// Reads from a buffer into a vector, waiting on an event list and
// filling a new empty event:
buffer.read(&dst_vec).ewait(&event_list).enew(&empty_event).enq().unwrap();
// Reads without blocking:
buffer.cmd().read_async(&dst_vec).enew(&empty_event).enq().unwrap();
</code></pre>
</div><h2 id='methods'>Methods</h2><h3 class='impl'><span class='in-band'><code>impl<'c, T> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> T: 'c + <a class="trait" href="../../ocl/traits/trait.OclPrm.html" title="trait ocl::traits::OclPrm">OclPrm</a>, </span></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/ocl/standard/buffer.rs.html#147-542' title='goto source code'>[src]</a></span></h3>
<div class='docblock'><p>[UNSTABLE]: All methods still in a state of flux.</p>
</div><div class='impl-items'><h4 id='method.new' class="method"><span id='new.v' class='invisible'><code>fn <a href='#method.new' class='fnname'>new</a>(<br> queue: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&'c <a class="struct" href="../../ocl/struct.Queue.html" title="struct ocl::Queue">Queue</a>>, <br> obj_core: &'c <a class="struct" href="../../ocl_core/types/abs/struct.Mem.html" title="struct ocl_core::types::abs::Mem">MemCore</a>, <br> mem_len: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Returns a new buffer command builder associated with with the
memory object <code>obj_core</code> along with a default <code>queue</code> and <code>mem_len</code>
(the length of the device side buffer).</p>
</div><h4 id='method.read' class="method"><span id='read.v' class='invisible'><code>fn <a href='#method.read' class='fnname'>read</a><'d, R>(self, dst_data: R) -> <a class="struct" href="../../ocl/builders/struct.BufferReadCmd.html" title="struct ocl::builders::BufferReadCmd">BufferReadCmd</a><'c, 'd, T> <span class="where fmt-newline">where<br> R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><ReadDst<'d, T>>, </span></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a blocking read operation.</p>
<p>After calling this method, the blocking state of this command will
be locked to true and a call to <code>::block</code> will cause a panic.</p>
<h3 id="panics" class="section-header"><a href="#panics">Panics</a></h3>
<p>The command operation kind must not have already been specified.</p>
<h3 id="more-information" class="section-header"><a href="#more-information">More Information</a></h3>
<p>See <a href="https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueReadBuffer.html">SDK</a> docs for more details.</p>
</div><h4 id='method.read_async' class="method"><span id='read_async.v' class='invisible'><code>unsafe fn <a href='#method.read_async' class='fnname'>read_async</a><'d>(<br> self, <br> dst_data: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&'d mut [</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a><br>) -> <a class="struct" href="../../ocl/builders/struct.BufferReadCmd.html" title="struct ocl::builders::BufferReadCmd">BufferReadCmd</a><'c, 'd, T></code></span></h4>
<div class='stability'><div class='stab deprecated'>Deprecated since 0.13.0<p>: Use '::read' with '::block(false)' for unsafe asynchronous reads.</p>
</div></div><div class='docblock'><p>Specifies that this command will be a non-blocking, asynchronous read
operation. [DEPRICATED]</p>
<p>Sets the block mode to false automatically but it may still be freely
toggled back. If set back to <code>true</code> this method call becomes equivalent
to calling <code>::read</code>.</p>
<h2 id="safety" class="section-header"><a href="#safety">Safety</a></h2>
<p>Caller must ensure that the container referred to by <code>dst_data</code> lives
until the call completes.</p>
<h2 id="panics-1" class="section-header"><a href="#panics-1">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
</div><h4 id='method.write' class="method"><span id='write.v' class='invisible'><code>fn <a href='#method.write' class='fnname'>write</a><'d, W>(self, src_data: W) -> <a class="struct" href="../../ocl/builders/struct.BufferWriteCmd.html" title="struct ocl::builders::BufferWriteCmd">BufferWriteCmd</a><'c, 'd, T> <span class="where fmt-newline">where<br> W: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><WriteSrc<'d, T>>, </span></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a write operation.</p>
<h3 id="panics-2" class="section-header"><a href="#panics-2">Panics</a></h3>
<p>The command operation kind must not have already been specified</p>
<h3 id="more-information-1" class="section-header"><a href="#more-information-1">More Information</a></h3>
<p>See <a href="https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueWriteBuffer.html">SDK</a> docs for more details.</p>
</div><h4 id='method.map' class="method"><span id='map.v' class='invisible'><code>fn <a href='#method.map' class='fnname'>map</a>(self) -> <a class="struct" href="../../ocl/builders/struct.BufferMapCmd.html" title="struct ocl::builders::BufferMapCmd">BufferMapCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a map operation.</p>
<p>If <code>.block(..)</code> has been set it will be ignored. Non-blocking map
commands are enqueued using <code>::enq_async</code>.</p>
<h2 id="panics-3" class="section-header"><a href="#panics-3">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
<h3 id="more-information-2" class="section-header"><a href="#more-information-2">More Information</a></h3>
<p>See <a href="https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueMapBuffer.html">SDK</a> docs for more details.</p>
</div><h4 id='method.copy' class="method"><span id='copy.v' class='invisible'><code>fn <a href='#method.copy' class='fnname'>copy</a><'d, M>(<br> self, <br> dst_buffer: &'d M, <br> dst_offset: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>>, <br> len: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>><br>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'd: 'c,<br> M: <a class="trait" href="../../ocl_core/types/abs/trait.AsMem.html" title="trait ocl_core::types::abs::AsMem">AsMem</a><T>, </span></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a copy operation.</p>
<p>If <code>.block(..)</code> has been set it will be ignored.</p>
<p><code>dst_offset</code> defaults to <code>0</code>, <code>len</code> defaults to the full length of the
source buffer.</p>
<h2 id="errors" class="section-header"><a href="#errors">Errors</a></h2>
<p>If this is a rectangular copy, <code>dst_offset</code> and <code>len</code> must be None.</p>
<h2 id="panics-4" class="section-header"><a href="#panics-4">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
<h3 id="more-information-3" class="section-header"><a href="#more-information-3">More Information</a></h3>
<p>See <a href="https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/clEnqueueCopyBuffer.html">SDK</a> docs for more details.</p>
</div><h4 id='method.copy_to_image' class="method"><span id='copy_to_image.v' class='invisible'><code>fn <a href='#method.copy_to_image' class='fnname'>copy_to_image</a><'d>(<br> self, <br> image: &'d <a class="struct" href="../../ocl_core/types/abs/struct.Mem.html" title="struct ocl_core::types::abs::Mem">MemCore</a>, <br> dst_origin: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 3]</a>, <br> region: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 3]</a><br>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'd: 'c, </span></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a copy to image operation.</p>
<p>If <code>.block(..)</code> has been set it will be ignored.</p>
<h2 id="panics-5" class="section-header"><a href="#panics-5">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
</div><h4 id='method.gl_acquire' class="method"><span id='gl_acquire.v' class='invisible'><code>fn <a href='#method.gl_acquire' class='fnname'>gl_acquire</a>(self) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies that this command will acquire a GL buffer.</p>
<p>If <code>.block(..)</code> has been set it will be ignored.</p>
<h2 id="panics-6" class="section-header"><a href="#panics-6">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
</div><h4 id='method.gl_release' class="method"><span id='gl_release.v' class='invisible'><code>fn <a href='#method.gl_release' class='fnname'>gl_release</a>(self) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies that this command will release a GL buffer.</p>
<p>If <code>.block(..)</code> has been set it will be ignored.</p>
<h2 id="panics-7" class="section-header"><a href="#panics-7">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
</div><h4 id='method.fill' class="method"><span id='fill.v' class='invisible'><code>fn <a href='#method.fill' class='fnname'>fill</a>(self, pattern: T, len: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies that this command will be a fill operation.</p>
<p>If <code>.block(..)</code> has been set it will be ignored.</p>
<p><code>pattern</code> is the vector or scalar value to repeat contiguously. <code>len</code>
is the overall size expressed in units of sizeof(T) If <code>len</code> is <code>None</code>,
the pattern will fill the entire buffer, otherwise, <code>len</code> must be
divisible by sizeof(<code>pattern</code>).</p>
<p>As an example if you want to fill the first 100 <code>cl_float4</code> sized
elements of a buffer, <code>pattern</code> would be a <code>cl_float4</code> and <code>len</code> would
be 400.</p>
<h2 id="panics-8" class="section-header"><a href="#panics-8">Panics</a></h2>
<p>The command operation kind must not have already been specified</p>
</div><h4 id='method.queue' class="method"><span id='queue.v' class='invisible'><code>fn <a href='#method.queue' class='fnname'>queue</a>(self, queue: &'c <a class="struct" href="../../ocl/struct.Queue.html" title="struct ocl::Queue">Queue</a>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies a queue to use for this call only.</p>
</div><h4 id='method.block' class="method"><span id='block.v' class='invisible'><code>unsafe fn <a href='#method.block' class='fnname'>block</a>(self, block: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies whether or not to block the current thread until completion.</p>
<p>Ignored if this is not a read or write operation.</p>
<p>Default is <code>block = true</code>.</p>
<h2 id="safety-1" class="section-header"><a href="#safety-1">Safety</a></h2>
<p>When performing non-blocking reads or writes, the caller must ensure
that the data being read from or written to is not accessed improperly
until the command completes. Use events (<code>Event::wait_for</code>) or the
command queue (<code>Queue::finish</code>) to synchronize.</p>
<p>If possible, prefer instead to use <a href="struct.BufferMapCmd.html"><code>::map</code></a> with <a href="struct.BufferMapCmd.html#method.enq_async"><code>::enq_async</code></a> for
optimal performance and data integrity.</p>
</div><h4 id='method.offset' class="method"><span id='offset.v' class='invisible'><code>fn <a href='#method.offset' class='fnname'>offset</a>(self, offset: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Sets the linear offset for an operation.</p>
<h2 id="panics-9" class="section-header"><a href="#panics-9">Panics</a></h2>
<p>The 'shape' may not have already been set to rectangular by the
<code>::rect</code> function.</p>
</div><h4 id='method.rect' class="method"><span id='rect.v' class='invisible'><code>fn <a href='#method.rect' class='fnname'>rect</a>(<br> self, <br> src_origin: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 3]</a>, <br> dst_origin: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 3]</a>, <br> region: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">[</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.array.html">; 3]</a>, <br> src_row_pitch_bytes: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> src_slc_pitch_bytes: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> dst_row_pitch_bytes: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, <br> dst_slc_pitch_bytes: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a><br>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T></code></span></h4>
<div class='docblock'><p>Specifies that this will be a rectangularly shaped operation
(the default being linear).</p>
<p>Row and slice pitches must all be expressed in bytes.</p>
<p>Only valid for 'read', 'write', and 'copy' modes. Will error if used
with any other mode.</p>
</div><h4 id='method.ewait' class="method"><span id='ewait.v' class='invisible'><code>fn <a href='#method.ewait' class='fnname'>ewait</a><'e, Ewl>(self, ewait: Ewl) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'e: 'c,<br> Ewl: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="../../ocl/builders/enum.ClWaitListPtrEnum.html" title="enum ocl::builders::ClWaitListPtrEnum">ClWaitListPtrEnum</a><'e>>, </span></code></span></h4>
<div class='docblock'><p>Specifies a list of events to wait on before the command will run.</p>
</div><h4 id='method.ewait_opt' class="method"><span id='ewait_opt.v' class='invisible'><code>fn <a href='#method.ewait_opt' class='fnname'>ewait_opt</a><'e, Ewl>(self, ewait: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Ewl>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'e: 'c,<br> Ewl: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="../../ocl/builders/enum.ClWaitListPtrEnum.html" title="enum ocl::builders::ClWaitListPtrEnum">ClWaitListPtrEnum</a><'e>>, </span></code></span></h4>
<div class='docblock'><p>Specifies a list of events to wait on before the command will run or
resets it to <code>None</code>.</p>
</div><h4 id='method.enew' class="method"><span id='enew.v' class='invisible'><code>fn <a href='#method.enew' class='fnname'>enew</a><'e, En>(self, enew: En) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'e: 'c,<br> En: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="../../ocl/builders/enum.ClNullEventPtrEnum.html" title="enum ocl::builders::ClNullEventPtrEnum">ClNullEventPtrEnum</a><'e>>, </span></code></span></h4>
<div class='docblock'><p>Specifies the destination for a new, optionally created event
associated with this command.</p>
</div><h4 id='method.enew_opt' class="method"><span id='enew_opt.v' class='invisible'><code>fn <a href='#method.enew_opt' class='fnname'>enew_opt</a><'e, En>(self, enew: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><En>) -> <a class="struct" href="../../ocl/builders/struct.BufferCmd.html" title="struct ocl::builders::BufferCmd">BufferCmd</a><'c, T> <span class="where fmt-newline">where<br> 'e: 'c,<br> En: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="enum" href="../../ocl/builders/enum.ClNullEventPtrEnum.html" title="enum ocl::builders::ClNullEventPtrEnum">ClNullEventPtrEnum</a><'e>>, </span></code></span></h4>
<div class='docblock'><p>Specifies a destination for a new, optionally created event
associated with this command or resets it to <code>None</code>.</p>
</div><h4 id='method.enq' class="method"><span id='enq.v' class='invisible'><code>fn <a href='#method.enq' class='fnname'>enq</a>(self) -> <a class="type" href="../../ocl/type.Result.html" title="type ocl::Result">OclResult</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">()</a>></code></span></h4>
<div class='docblock'><p>Enqueues this command.</p>
</div></div></section>
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<div class="shortcuts">
<h2>Keyboard Shortcuts</h2>
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<dt>?</dt>
<dd>Show this help dialog</dd>
<dt>S</dt>
<dd>Focus the search field</dd>
<dt>⇤</dt>
<dd>Move up in search results</dd>
<dt>⇥</dt>
<dd>Move down in search results</dd>
<dt>⏎</dt>
<dd>Go to active search result</dd>
<dt>+</dt>
<dd>Collapse/expand all sections</dd>
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<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
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