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<h1>include/nucleus/vdso.h</h1><a href="vdso_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef _XENO_NUCLEUS_VDSO_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define _XENO_NUCLEUS_VDSO_H</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <nucleus/types.h></span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="comment">/*</span>
<a name="l00029"></a>00029 <span class="comment"> * Data shared between Xenomai kernel/userland and the Linux kernel/userland</span>
<a name="l00030"></a>00030 <span class="comment"> * on the global semaphore heap. The features element indicates which data are</span>
<a name="l00031"></a>00031 <span class="comment"> * shared. Notice that struct xnvdso may only grow, but never shrink.</span>
<a name="l00032"></a>00032 <span class="comment"> */</span>
<a name="l00033"></a>00033 <span class="keyword">struct </span>xnvdso {
<a name="l00034"></a>00034 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> features;
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="comment">/* Embed domain specific structures that describe the</span>
<a name="l00037"></a>00037 <span class="comment"> * shared data here */</span>
<a name="l00038"></a>00038 };
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">/*</span>
<a name="l00041"></a>00041 <span class="comment"> * For each shared feature, add a flag below. For now, the set is still</span>
<a name="l00042"></a>00042 <span class="comment"> * empty.</span>
<a name="l00043"></a>00043 <span class="comment"> */</span>
<a name="l00044"></a>00044 <span class="comment">/*</span>
<a name="l00045"></a>00045 <span class="comment">#define XNVDSO_FEAT_A 0x0000000000000001ULL</span>
<a name="l00046"></a>00046 <span class="comment">#define XNVDSO_FEAT_B 0x0000000000000002ULL</span>
<a name="l00047"></a>00047 <span class="comment">#define XNVDSO_FEAT_C 0x0000000000000004ULL</span>
<a name="l00048"></a>00048 <span class="comment">#define XNVDSO_FEATURES (XNVDSO_FEAT_A | XNVDSO_FEAT_B | XVDSO_FEAT_C)</span>
<a name="l00049"></a>00049 <span class="comment">*/</span>
<a name="l00050"></a>00050 <span class="preprocessor">#define XNVDSO_FEAT_DROP_U_MODE 0x0000000000000001ULL</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span><span class="preprocessor">#define XNVDSO_FEATURES (XNVDSO_FEAT_DROP_U_MODE)</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="keyword">extern</span> <span class="keyword">struct </span>xnvdso *nkvdso;
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> xnvdso_test_feature(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> feature)
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 <span class="keywordflow">return</span> testbits(nkvdso->features, feature);
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keyword">extern</span> <span class="keywordtype">void</span> xnheap_init_vdso(<span class="keywordtype">void</span>);
<a name="l00061"></a>00061 <span class="preprocessor">#endif </span><span class="comment">/* _XENO_NUCLEUS_VDSO_H */</span>
</pre></div></div>
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