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<li class="navelem"><a class="el" href="dir_60653f571628600f3ea311ad070e9a99.html">fuse-3.10.4</a></li><li class="navelem"><a class="el" href="dir_60f9ef3702c132e768db1c143f0e2ec2.html">example</a></li> </ul>
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<a href="fuse-3_810_84_2example_2poll_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> FUSE fsel: FUSE select example</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> Copyright (C) 2008 SUSE Linux Products GmbH</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (C) 2008 Tejun Heo <teheo@suse.de></span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> This program can be distributed under the terms of the GNU GPLv2.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> See the file COPYING.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define FUSE_USE_VERSION 31</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <config.h></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <fuse.h></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <unistd.h></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <ctype.h></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <stdlib.h></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <errno.h></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <time.h></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <pthread.h></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <poll.h></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * fsel_open_mask is used to limit the number of opens to 1 per file.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * This is to use file index (0-F) as fh as poll support requires</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * unique fh per open file. Lifting this would require proper open</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * file management.</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> fsel_open_mask;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> fsel_hex_map[] = <span class="stringliteral">"0123456789ABCDEF"</span>;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">static</span> <span class="keyword">struct </span>fuse *fsel_fuse; <span class="comment">/* needed for poll notification */</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#define FSEL_CNT_MAX 10 </span><span class="comment">/* each file can store upto 10 chars */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#define FSEL_FILES 16</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">static</span> pthread_mutex_t fsel_mutex; <span class="comment">/* protects notify_mask and cnt array */</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> fsel_poll_notify_mask; <span class="comment">/* poll notification scheduled? */</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">static</span> <span class="keyword">struct </span>fuse_pollhandle *fsel_poll_handle[FSEL_FILES]; <span class="comment">/* poll notify handles */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> fsel_cnt[FSEL_FILES]; <span class="comment">/* nbytes stored in each file */</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_path_index(<span class="keyword">const</span> <span class="keywordtype">char</span> *path)</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordtype">char</span> ch = path[1];</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">if</span> (strlen(path) != 2 || path[0] != <span class="charliteral">'/'</span> || !isxdigit(ch) || islower(ch))</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> ch <= <span class="charliteral">'9'</span> ? ch - <span class="charliteral">'0'</span> : ch - <span class="charliteral">'A'</span> + 10;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_getattr(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">struct</span> stat *stbuf,</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi)</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  (void) fi;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">int</span> idx;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  memset(stbuf, 0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> stat));</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">if</span> (strcmp(path, <span class="stringliteral">"/"</span>) == 0) {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  stbuf->st_mode = S_IFDIR | 0555;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  stbuf->st_nlink = 2;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  }</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  idx = fsel_path_index(path);</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">if</span> (idx < 0)</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> -ENOENT;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  stbuf->st_mode = S_IFREG | 0444;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  stbuf->st_nlink = 1;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  stbuf->st_size = fsel_cnt[idx];</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> }</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_readdir(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keywordtype">void</span> *buf, <a class="code" href="fuse-3_810_84_2include_2fuse_8h.html#a7dd132de66a5cc2add2a4eff5d435660">fuse_fill_dir_t</a> filler,</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  off_t offset, <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi,</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">enum</span> <a class="code" href="fuse-3_810_84_2include_2fuse_8h.html#af2bcf2a473b41b3cc8da8c079656a074">fuse_readdir_flags</a> flags)</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">char</span> name[2] = { };</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  (void) offset;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  (void) fi;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  (void) flags;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (strcmp(path, <span class="stringliteral">"/"</span>) != 0)</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> -ENOENT;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">for</span> (i = 0; i < FSEL_FILES; i++) {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  name[0] = fsel_hex_map[i];</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  filler(buf, name, NULL, 0, 0);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_open(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi)</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordtype">int</span> idx = fsel_path_index(path);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (idx < 0)</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">return</span> -ENOENT;</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> ((fi-><a class="code" href="structfuse__file__info.html#ae7d31802727be19670193a411647bca5">flags</a> & O_ACCMODE) != O_RDONLY)</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> -EACCES;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (fsel_open_mask & (1 << idx))</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> -EBUSY;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  fsel_open_mask |= (1 << idx);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * fsel files are nonseekable somewhat pipe-like files which</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * gets filled up periodically by producer thread and consumed</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> * on read. Tell FUSE as such.</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  fi-><a class="code" href="structfuse__file__info.html#a45314d0b92a8d4c9de33d996aa59ada8">fh</a> = idx;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  fi-><a class="code" href="structfuse__file__info.html#a03b59a10e62963d9affa34ad78bd144a">direct_io</a> = 1;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  fi-><a class="code" href="structfuse__file__info.html#a272022c57a6a79dd8f98ef597786e154">nonseekable</a> = 1;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_release(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi)</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">int</span> idx = fi-><a class="code" href="structfuse__file__info.html#a45314d0b92a8d4c9de33d996aa59ada8">fh</a>;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  (void) path;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  fsel_open_mask &= ~(1 << idx);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> }</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_read(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keywordtype">char</span> *buf, <span class="keywordtype">size_t</span> size, off_t offset,</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi)</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">int</span> idx = fi-><a class="code" href="structfuse__file__info.html#a45314d0b92a8d4c9de33d996aa59ada8">fh</a>;</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  (void) path;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  (void) offset;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  pthread_mutex_lock(&fsel_mutex);</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (fsel_cnt[idx] < size)</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  size = fsel_cnt[idx];</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  printf(<span class="stringliteral">"READ %X transferred=%zu cnt=%u\n"</span>, idx, size, fsel_cnt[idx]);</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  fsel_cnt[idx] -= size;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  pthread_mutex_unlock(&fsel_mutex);</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  memset(buf, fsel_hex_map[idx], size);</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> size;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> }</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="keyword">static</span> <span class="keywordtype">int</span> fsel_poll(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">struct</span> <a class="code" href="structfuse__file__info.html">fuse_file_info</a> *fi,</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">struct</span> fuse_pollhandle *ph, <span class="keywordtype">unsigned</span> *reventsp)</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> {</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keyword">static</span> <span class="keywordtype">unsigned</span> polled_zero;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordtype">int</span> idx = fi-><a class="code" href="structfuse__file__info.html#a45314d0b92a8d4c9de33d996aa59ada8">fh</a>;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  (void) path;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  </div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * Poll notification requires pointer to struct fuse which</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * can't be obtained when using fuse_main(). As notification</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * happens only after poll is called, fill it here from</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * fuse_context.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (!fsel_fuse) {</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">struct </span><a class="code" href="structfuse__context.html">fuse_context</a> *cxt = <a class="code" href="fuse-3_810_84_2include_2fuse_8h.html#a9a0f2a6603cb1e21f5e4c1aec84a3bcc">fuse_get_context</a>();</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (cxt)</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  fsel_fuse = cxt-><a class="code" href="structfuse__context.html#a9f2163e75f0333774a43b6c770253e8d">fuse</a>;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  </div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  pthread_mutex_lock(&fsel_mutex);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">if</span> (ph != NULL) {</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">struct </span>fuse_pollhandle *oldph = fsel_poll_handle[idx];</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">if</span> (oldph)</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="fuse-3_810_84_2include_2fuse__common_8h.html#adf5027f8a38b2efc03858efd7fdc756a">fuse_pollhandle_destroy</a>(oldph);</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  fsel_poll_notify_mask |= (1 << idx);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  fsel_poll_handle[idx] = ph;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span> (fsel_cnt[idx]) {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  *reventsp |= POLLIN;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  printf(<span class="stringliteral">"POLL %X cnt=%u polled_zero=%u\n"</span>,</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  idx, fsel_cnt[idx], polled_zero);</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  polled_zero = 0;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  polled_zero++;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  pthread_mutex_unlock(&fsel_mutex);</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">struct </span><a class="code" href="structfuse__operations.html">fuse_operations</a> fsel_oper = {</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  .<a class="code" href="structfuse__operations.html#a60144dbd1a893008d9112e949300eb77">getattr</a> = fsel_getattr,</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  .readdir = fsel_readdir,</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  .open = fsel_open,</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  .release = fsel_release,</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  .read = fsel_read,</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  .poll = fsel_poll,</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> };</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">static</span> <span class="keywordtype">void</span> *fsel_producer(<span class="keywordtype">void</span> *data)</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">const</span> <span class="keyword">struct </span>timespec interval = { 0, 250000000 };</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordtype">unsigned</span> idx = 0, nr = 1;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  (void) data;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">while</span> (1) {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordtype">int</span> i, t;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  pthread_mutex_lock(&fsel_mutex);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  </div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * This is the main producer loop which is executed</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * ever 500ms. On each iteration, it fills one byte</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * to 1, 2 or 4 files and sends poll notification if</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * requested.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">for</span> (i = 0, t = idx; i < nr;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  i++, t = (t + FSEL_FILES / nr) % FSEL_FILES) {</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> (fsel_cnt[t] == FSEL_CNT_MAX)</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  fsel_cnt[t]++;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (fsel_fuse && (fsel_poll_notify_mask & (1 << t))) {</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">struct </span>fuse_pollhandle *ph;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  </div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  printf(<span class="stringliteral">"NOTIFY %X\n"</span>, t);</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  ph = fsel_poll_handle[t];</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  fuse_notify_poll(ph);</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <a class="code" href="fuse-3_810_84_2include_2fuse__common_8h.html#adf5027f8a38b2efc03858efd7fdc756a">fuse_pollhandle_destroy</a>(ph);</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  fsel_poll_notify_mask &= ~(1 << t);</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  fsel_poll_handle[t] = NULL;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  }</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  idx = (idx + 1) % FSEL_FILES;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">if</span> (idx == 0)</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  nr = (nr * 2) % 7; <span class="comment">/* cycle through 1, 2 and 4 */</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  pthread_mutex_unlock(&fsel_mutex);</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  nanosleep(&interval, NULL);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  pthread_t producer;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  pthread_attr_t attr;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  errno = pthread_mutex_init(&fsel_mutex, NULL);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (errno) {</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  perror(<span class="stringliteral">"pthread_mutex_init"</span>);</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  </div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  errno = pthread_attr_init(&attr);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">if</span> (errno) {</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  perror(<span class="stringliteral">"pthread_attr_init"</span>);</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  errno = pthread_create(&producer, &attr, fsel_producer, NULL);</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">if</span> (errno) {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  perror(<span class="stringliteral">"pthread_create"</span>);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  ret = <a class="code" href="fuse-3_810_84_2include_2fuse_8h.html#ac99b844cee7aaa8fb4e35df5b5488d82">fuse_main</a>(argc, argv, &fsel_oper, NULL);</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  pthread_cancel(producer);</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  pthread_join(producer, NULL);</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> }</div>
<div class="ttc" id="afuse-3_810_84_2include_2fuse_8h_html_a7dd132de66a5cc2add2a4eff5d435660"><div class="ttname"><a href="fuse-3_810_84_2include_2fuse_8h.html#a7dd132de66a5cc2add2a4eff5d435660">fuse_fill_dir_t</a></div><div class="ttdeci">int(* fuse_fill_dir_t)(void *buf, const char *name, const struct stat *stbuf, off_t off, enum fuse_fill_dir_flags flags)</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00085">fuse.h:85</a></div></div>
<div class="ttc" id="afuse-3_810_84_2include_2fuse_8h_html_a9a0f2a6603cb1e21f5e4c1aec84a3bcc"><div class="ttname"><a href="fuse-3_810_84_2include_2fuse_8h.html#a9a0f2a6603cb1e21f5e4c1aec84a3bcc">fuse_get_context</a></div><div class="ttdeci">struct fuse_context * fuse_get_context(void)</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2lib_2fuse_8c_source.html#l04607">fuse.c:4607</a></div></div>
<div class="ttc" id="afuse-3_810_84_2include_2fuse_8h_html_ac99b844cee7aaa8fb4e35df5b5488d82"><div class="ttname"><a href="fuse-3_810_84_2include_2fuse_8h.html#ac99b844cee7aaa8fb4e35df5b5488d82">fuse_main</a></div><div class="ttdeci">#define fuse_main(argc, argv, op, private_data)</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00878">fuse.h:878</a></div></div>
<div class="ttc" id="afuse-3_810_84_2include_2fuse_8h_html_af2bcf2a473b41b3cc8da8c079656a074"><div class="ttname"><a href="fuse-3_810_84_2include_2fuse_8h.html#af2bcf2a473b41b3cc8da8c079656a074">fuse_readdir_flags</a></div><div class="ttdeci">fuse_readdir_flags</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00042">fuse.h:42</a></div></div>
<div class="ttc" id="afuse-3_810_84_2include_2fuse__common_8h_html_adf5027f8a38b2efc03858efd7fdc756a"><div class="ttname"><a href="fuse-3_810_84_2include_2fuse__common_8h.html#adf5027f8a38b2efc03858efd7fdc756a">fuse_pollhandle_destroy</a></div><div class="ttdeci">void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2lib_2fuse__lowlevel_8c_source.html#l01809">fuse_lowlevel.c:1809</a></div></div>
<div class="ttc" id="astructfuse__context_html"><div class="ttname"><a href="structfuse__context.html">fuse_context</a></div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00800">fuse.h:800</a></div></div>
<div class="ttc" id="astructfuse__context_html_a9f2163e75f0333774a43b6c770253e8d"><div class="ttname"><a href="structfuse__context.html#a9f2163e75f0333774a43b6c770253e8d">fuse_context::fuse</a></div><div class="ttdeci">struct fuse * fuse</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00802">fuse.h:802</a></div></div>
<div class="ttc" id="astructfuse__file__info_html"><div class="ttname"><a href="structfuse__file__info.html">fuse_file_info</a></div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse__common_8h_source.html#l00044">fuse_common.h:44</a></div></div>
<div class="ttc" id="astructfuse__file__info_html_a03b59a10e62963d9affa34ad78bd144a"><div class="ttname"><a href="structfuse__file__info.html#a03b59a10e62963d9affa34ad78bd144a">fuse_file_info::direct_io</a></div><div class="ttdeci">unsigned int direct_io</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse__common_8h_source.html#l00057">fuse_common.h:57</a></div></div>
<div class="ttc" id="astructfuse__file__info_html_a272022c57a6a79dd8f98ef597786e154"><div class="ttname"><a href="structfuse__file__info.html#a272022c57a6a79dd8f98ef597786e154">fuse_file_info::nonseekable</a></div><div class="ttdeci">unsigned int nonseekable</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse__common_8h_source.html#l00073">fuse_common.h:73</a></div></div>
<div class="ttc" id="astructfuse__file__info_html_a45314d0b92a8d4c9de33d996aa59ada8"><div class="ttname"><a href="structfuse__file__info.html#a45314d0b92a8d4c9de33d996aa59ada8">fuse_file_info::fh</a></div><div class="ttdeci">uint64_t fh</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse__common_8h_source.html#l00093">fuse_common.h:93</a></div></div>
<div class="ttc" id="astructfuse__file__info_html_ae7d31802727be19670193a411647bca5"><div class="ttname"><a href="structfuse__file__info.html#ae7d31802727be19670193a411647bca5">fuse_file_info::flags</a></div><div class="ttdeci">int flags</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse__common_8h_source.html#l00046">fuse_common.h:46</a></div></div>
<div class="ttc" id="astructfuse__operations_html"><div class="ttname"><a href="structfuse__operations.html">fuse_operations</a></div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00302">fuse.h:302</a></div></div>
<div class="ttc" id="astructfuse__operations_html_a60144dbd1a893008d9112e949300eb77"><div class="ttname"><a href="structfuse__operations.html#a60144dbd1a893008d9112e949300eb77">fuse_operations::getattr</a></div><div class="ttdeci">int(* getattr)(const char *, struct stat *, struct fuse_file_info *fi)</div><div class="ttdef"><b>Definition:</b> <a href="fuse-3_810_84_2include_2fuse_8h_source.html#l00314">fuse.h:314</a></div></div>
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