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<li class="toctree-l2"><a class="reference internal" href="nghttp2_session_get_stream_user_data.html">nghttp2_session_get_stream_user_data</a></li>
<li class="toctree-l2"><a class="reference internal" href="nghttp2_session_mem_recv.html">nghttp2_session_mem_recv</a></li>
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<li class="toctree-l2 current"><a class="current reference internal" href="#">nghttp2_session_set_local_window_size</a><ul>
<li class="toctree-l3"><a class="reference internal" href="#synopsis">Synopsis</a></li>
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<div class="section" id="nghttp2-session-set-local-window-size">
<h1>nghttp2_session_set_local_window_size<a class="headerlink" href="#nghttp2-session-set-local-window-size" title="Permalink to this headline">¶</a></h1>
<div class="section" id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
<p><em>#include <nghttp2/nghttp2.h></em></p>
<dl class="function">
<dt id="c.nghttp2_session_set_local_window_size">
int <code class="descname">nghttp2_session_set_local_window_size</code><span class="sig-paren">(</span><a class="reference internal" href="types.html#c.nghttp2_session" title="nghttp2_session">nghttp2_session</a><em> *session</em>, uint8_t<em> flags</em>, int32_t<em> stream_id</em>, int32_t<em> window_size</em><span class="sig-paren">)</span><a class="headerlink" href="#c.nghttp2_session_set_local_window_size" title="Permalink to this definition">¶</a></dt>
<dd><p>Set local window size (local endpoints’s window size) to the given
<em>window_size</em> for the given stream denoted by <em>stream_id</em>. To
change connection level window size, specify 0 to <em>stream_id</em>. To
increase window size, this function may submit WINDOW_UPDATE frame
to transmission queue.</p>
<p>The <em>flags</em> is currently ignored and should be
<a class="reference internal" href="enums.html#c.NGHTTP2_FLAG_NONE" title="NGHTTP2_FLAG_NONE"><code class="xref c c-macro docutils literal notranslate"><span class="pre">NGHTTP2_FLAG_NONE</span></code></a>.</p>
<p>This sounds similar to <a class="reference internal" href="nghttp2_submit_window_update.html#c.nghttp2_submit_window_update" title="nghttp2_submit_window_update"><code class="xref c c-func docutils literal notranslate"><span class="pre">nghttp2_submit_window_update()</span></code></a>, but there
are 2 differences. The first difference is that this function
takes the absolute value of window size to set, rather than the
delta. To change the window size, this may be easier to use since
the application just declares the intended window size, rather than
calculating delta. The second difference is that
<a class="reference internal" href="nghttp2_submit_window_update.html#c.nghttp2_submit_window_update" title="nghttp2_submit_window_update"><code class="xref c c-func docutils literal notranslate"><span class="pre">nghttp2_submit_window_update()</span></code></a> affects the received bytes count
which has not acked yet. By the specification of
<a class="reference internal" href="nghttp2_submit_window_update.html#c.nghttp2_submit_window_update" title="nghttp2_submit_window_update"><code class="xref c c-func docutils literal notranslate"><span class="pre">nghttp2_submit_window_update()</span></code></a>, to strictly increase the local
window size, we have to submit delta including all received bytes
count, which might not be desirable in some cases. On the other
hand, this function does not affect the received bytes count. It
just sets the local window size to the given value.</p>
<p>This function returns 0 if it succeeds, or one of the following
negative error codes:</p>
<dl class="docutils">
<dt><a class="reference internal" href="enums.html#c.NGHTTP2_ERR_INVALID_ARGUMENT" title="NGHTTP2_ERR_INVALID_ARGUMENT"><code class="xref c c-macro docutils literal notranslate"><span class="pre">NGHTTP2_ERR_INVALID_ARGUMENT</span></code></a></dt>
<dd>The <em>stream_id</em> is negative.</dd>
<dt><a class="reference internal" href="enums.html#c.NGHTTP2_ERR_NOMEM" title="NGHTTP2_ERR_NOMEM"><code class="xref c c-macro docutils literal notranslate"><span class="pre">NGHTTP2_ERR_NOMEM</span></code></a></dt>
<dd>Out of memory.</dd>
</dl>
</dd></dl>
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