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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// vi:set ft=cpp: -*- Mode: C++ -*-</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">/*</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> * (c) 2014 Alexander Warg <alexander.warg@kernkonzept.com></span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> *</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> * License: see LICENSE.spdx (in this directory or the directories above)</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> */</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#pragma once</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include "<a class="code" href="types.html">types</a>"</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include "ipc_basics"</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceL4.html">L4</a> { <span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceL4_1_1Ipc.html">Ipc</a> <a class="code hl_define" href="group__l4sys__defines.html#ga63e7f1ab50a1b3049bdd0a34e97423c2">L4_EXPORT</a> {</div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment">// ---------------------------------------------------------------</span></div>
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<div class="foldopen" id="foldopen00023" data-start="{" data-end="};">
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="structL4_1_1Ipc_1_1Ret__array.html"> 23</a></span><span class="keyword">template</span><<span class="keyword">typename</span> T> <span class="keyword">struct </span><a class="code hl_define" href="group__l4sys__defines.html#ga63e7f1ab50a1b3049bdd0a34e97423c2">L4_EXPORT</a> Ret_array</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span>{</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">typedef</span> T <span class="keyword">const</span> **ptr_type;</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> T *value = <span class="keyword">nullptr</span>;</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keywordtype">unsigned</span> max = 0;</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> Ret_array() {}</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> Ret_array(T *v, <span class="keywordtype">unsigned</span> max) : value(v), max(max) {}</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span>};</div>
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</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceL4_1_1Ipc_1_1Msg.html">Msg</a> {</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">template</span><<span class="keyword">typename</span> A> <span class="keyword">struct </span>Elem< <a class="code hl_struct" href="structL4_1_1Ipc_1_1Ret__array.html">Ret_array</a><A> ></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span>{</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">enum</span> { Is_optional = <span class="keyword">false</span> };</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">typedef</span> Ret_array<A> type;</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">typedef</span> <span class="keyword">typename</span> type::ptr_type arg_type;</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">typedef</span> type svr_type;</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">typedef</span> type svr_arg_type;</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>};</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="keyword">template</span><<span class="keyword">typename</span> A></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="keyword">struct </span>Is_valid_rpc_type<Ret_array<A> *> : <a class="code hl_struct" href="structL4_1_1Types_1_1False.html">L4::Types::False</a> {};</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="keyword">template</span><<span class="keyword">typename</span> A></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="keyword">struct </span><a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Is__valid__rpc__type.html">Is_valid_rpc_type</a><Ret_array<A> &> : L4::Types::False {};</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="keyword">template</span><<span class="keyword">typename</span> A></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">struct </span><a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Is__valid__rpc__type.html">Is_valid_rpc_type</a><Ret_array<A> const &> : L4::Types::False {};</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="keyword">template</span><<span class="keyword">typename</span> A></div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span><span class="keyword">struct </span><a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Is__valid__rpc__type.html">Is_valid_rpc_type</a><Ret_array<A> const *> : L4::Types::False {};</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="keyword">template</span><<span class="keyword">typename</span> A> <span class="keyword">struct </span>Class< Ret_array<A> > : Class<A>::type {};</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="keyword">template</span><<span class="keyword">typename</span> A> <span class="keyword">struct </span>Direction< Ret_array<A> > : <a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Dir__out.html">Dir_out</a> {};</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="keyword">template</span><<span class="keyword">typename</span> A, <span class="keyword">typename</span> CLASS></div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="keyword">struct </span>Clnt_val_ops<A const *, <a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Dir__out.html">Dir_out</a>, CLASS> : Clnt_noops<A const *></div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span>{</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">using </span>Clnt_noops<A <span class="keyword">const</span> *>::from_msg;</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">static</span> <span class="keywordtype">int</span> from_msg(<span class="keywordtype">char</span> *msg, <span class="keywordtype">unsigned</span> offset, <span class="keywordtype">unsigned</span> limit, <span class="keywordtype">long</span> ret,</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> A <span class="keyword">const</span> *&arg, <a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Dir__out.html">Dir_out</a>, <a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Cls__data.html">Cls_data</a>)</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> {</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> offset = <a class="code hl_function" href="namespaceL4_1_1Ipc_1_1Msg.html#a4c49044add1c08a33fcec1ff70ad4630">align_to<A></a>(offset);</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> arg = <span class="keyword">reinterpret_cast<</span>A <span class="keyword">const </span>*<span class="keyword">></span>(msg + offset);</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">if</span> (<a class="code hl_define" href="group__l4sys__defines.html#ga3df4200910f2664b97397c23693beeb0">L4_UNLIKELY</a>(!<a class="code hl_function" href="namespaceL4_1_1Ipc_1_1Msg.html#a4731cd4b6101837ea42a1030f8c0131b">check_size<A></a>(offset, limit, ret)))</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">return</span> offset + ret * <span class="keyword">sizeof</span>(A);</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> }</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span>};</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span><span class="keyword">template</span><<span class="keyword">typename</span> A, <span class="keyword">typename</span> CLASS></div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span><span class="keyword">struct </span><a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Svr__val__ops.html">Svr_val_ops</a><Ret_array<A>, <a class="code hl_struct" href="structL4_1_1Ipc_1_1Msg_1_1Dir__out.html">Dir_out</a>, CLASS> :</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> Svr_noops<Ret_array<A> ></div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span>{</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">typedef</span> Ret_array<A> ret_array;</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">using </span>Svr_noops<ret_array>::from_svr;</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">static</span> <span class="keywordtype">int</span> from_svr(<span class="keywordtype">char</span> *, <span class="keywordtype">unsigned</span> offset, <span class="keywordtype">unsigned</span> limit, <span class="keywordtype">long</span> ret,</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> ret_array <span class="keyword">const</span> &, Dir_out, CLASS)</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> {</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> offset = <a class="code hl_function" href="namespaceL4_1_1Ipc_1_1Msg.html#a4c49044add1c08a33fcec1ff70ad4630">align_to<A></a>(offset);</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">if</span> (<a class="code hl_define" href="group__l4sys__defines.html#ga3df4200910f2664b97397c23693beeb0">L4_UNLIKELY</a>(!<a class="code hl_function" href="namespaceL4_1_1Ipc_1_1Msg.html#a4731cd4b6101837ea42a1030f8c0131b">check_size<A></a>(offset, limit, ret)))</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> offset += <span class="keyword">sizeof</span>(A) * ret;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keywordflow">return</span> offset;</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> }</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> </div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">using </span>Svr_noops<ret_array>::to_svr;</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">static</span> <span class="keywordtype">int</span> to_svr(<span class="keywordtype">char</span> *msg, <span class="keywordtype">unsigned</span> offset, <span class="keywordtype">unsigned</span> limit,</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> ret_array &arg, Dir_out, CLASS)</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> {</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="comment">// there can be actually no limit check here, as this</span></div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// is variably sized output array</span></div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// FIXME: we could somehow makesure that this is the last</span></div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// output value...</span></div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> offset = <a class="code hl_function" href="namespaceL4_1_1Ipc_1_1Msg.html#a4c49044add1c08a33fcec1ff70ad4630">align_to<A></a>(offset);</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> arg = ret_array(<span class="keyword">reinterpret_cast<</span>A*<span class="keyword">></span>(msg + offset),</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> (limit - offset) / <span class="keyword">sizeof</span>(A));</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// FIXME: we dont know the length of the array here so, cheat</span></div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keywordflow">return</span> offset;</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> }</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span>};</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span>} <span class="comment">// namespace Msg</span></div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span>}}</div>
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<div class="ttc" id="agroup__l4sys__defines_html_ga3df4200910f2664b97397c23693beeb0"><div class="ttname"><a href="group__l4sys__defines.html#ga3df4200910f2664b97397c23693beeb0">L4_UNLIKELY</a></div><div class="ttdeci">#define L4_UNLIKELY(x)</div><div class="ttdoc">Expression is unlikely to execute.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00284">compiler.h:284</a></div></div>
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<div class="ttc" id="agroup__l4sys__defines_html_ga63e7f1ab50a1b3049bdd0a34e97423c2"><div class="ttname"><a href="group__l4sys__defines.html#ga63e7f1ab50a1b3049bdd0a34e97423c2">L4_EXPORT</a></div><div class="ttdeci">#define L4_EXPORT</div><div class="ttdoc">Attribute to mark functions, variables, and data types as being exported from a library.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00214">compiler.h:214</a></div></div>
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<div class="ttc" id="anamespaceL4_1_1Ipc_1_1Msg_html"><div class="ttname"><a href="namespaceL4_1_1Ipc_1_1Msg.html">L4::Ipc::Msg</a></div><div class="ttdoc">IPC Message related functionality.</div><div class="ttdef"><b>Definition</b> <a href="ipc__array_source.html#l00154">ipc_array:154</a></div></div>
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<div class="ttc" id="anamespaceL4_1_1Ipc_1_1Msg_html_a4731cd4b6101837ea42a1030f8c0131b"><div class="ttname"><a href="namespaceL4_1_1Ipc_1_1Msg.html#a4731cd4b6101837ea42a1030f8c0131b">L4::Ipc::Msg::check_size</a></div><div class="ttdeci">constexpr bool check_size(unsigned offset, unsigned limit) noexcept</div><div class="ttdoc">Check if there is enough space for T from offset to limit.</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00053">ipc_basics:53</a></div></div>
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<div class="ttc" id="anamespaceL4_1_1Ipc_1_1Msg_html_a4c49044add1c08a33fcec1ff70ad4630"><div class="ttname"><a href="namespaceL4_1_1Ipc_1_1Msg.html#a4c49044add1c08a33fcec1ff70ad4630">L4::Ipc::Msg::align_to</a></div><div class="ttdeci">constexpr unsigned long align_to(unsigned long bytes, unsigned long align) noexcept</div><div class="ttdoc">Pad bytes to the given alignment align (in bytes).</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00030">ipc_basics:30</a></div></div>
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<div class="ttc" id="anamespaceL4_1_1Ipc_html"><div class="ttname"><a href="namespaceL4_1_1Ipc.html">L4::Ipc</a></div><div class="ttdoc">IPC related functionality.</div><div class="ttdef"><b>Definition</b> <a href="ipc__array_source.html#l00013">ipc_array:13</a></div></div>
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<div class="ttc" id="anamespaceL4_html"><div class="ttname"><a href="namespaceL4.html">L4</a></div><div class="ttdoc">L4 low-level kernel interface.</div><div class="ttdef"><b>Definition</b> <a href="l4sys-l4f-groups_8dox_source.html#l00050">l4sys-l4f-groups.dox:50</a></div></div>
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<div class="ttc" id="astructL4_1_1Ipc_1_1Msg_1_1Cls__data_html"><div class="ttname"><a href="structL4_1_1Ipc_1_1Msg_1_1Cls__data.html">L4::Ipc::Msg::Cls_data</a></div><div class="ttdoc">Marker type for data values.</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00150">ipc_basics:150</a></div></div>
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<div class="ttc" id="astructL4_1_1Ipc_1_1Msg_1_1Dir__out_html"><div class="ttname"><a href="structL4_1_1Ipc_1_1Msg_1_1Dir__out.html">L4::Ipc::Msg::Dir_out</a></div><div class="ttdoc">Marker type for output values.</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00147">ipc_basics:147</a></div></div>
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<div class="ttc" id="astructL4_1_1Ipc_1_1Msg_1_1Is__valid__rpc__type_html"><div class="ttname"><a href="structL4_1_1Ipc_1_1Msg_1_1Is__valid__rpc__type.html">L4::Ipc::Msg::Is_valid_rpc_type</a></div><div class="ttdoc">Type trait defining a valid RPC parameter type.</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00339">ipc_basics:339</a></div></div>
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<div class="ttc" id="astructL4_1_1Ipc_1_1Msg_1_1Svr__val__ops_html"><div class="ttname"><a href="structL4_1_1Ipc_1_1Msg_1_1Svr__val__ops.html">L4::Ipc::Msg::Svr_val_ops</a></div><div class="ttdoc">Defines client-side handling of `MTYPE' as RPC argument.</div><div class="ttdef"><b>Definition</b> <a href="ipc__basics_source.html#l00264">ipc_basics:264</a></div></div>
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<div class="ttc" id="astructL4_1_1Ipc_1_1Ret__array_html"><div class="ttname"><a href="structL4_1_1Ipc_1_1Ret__array.html">L4::Ipc::Ret_array</a></div><div class="ttdoc">Dynamically sized output array of type T.</div><div class="ttdef"><b>Definition</b> <a href="#l00023">ipc_ret_array:24</a></div></div>
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<div class="ttc" id="astructL4_1_1Types_1_1False_html"><div class="ttname"><a href="structL4_1_1Types_1_1False.html">L4::Types::False</a></div><div class="ttdoc">False meta value.</div><div class="ttdef"><b>Definition</b> <a href="types_source.html#l00296">types:296</a></div></div>
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<div class="ttc" id="atypes_html"><div class="ttname"><a href="types.html">types</a></div></div>
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