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<div class="title">pipe.c</div> </div>
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<a href="pipe_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"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="pipe_8h.html">sys/pipe.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="sysproto__posix_8h.html">sys/sysproto_posix.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="thread_8h.html">sys/thread.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="assert_8h.html">assert.h</a>></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="descrip_8h.html">sys/descrip.h</a>></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="pipe_8c.html#acbd82ee803ba9432a295a8e2a0a3f249"> 39</a></span> <span class="keywordtype">int</span> <a class="code" href="pipe_8c.html#acbd82ee803ba9432a295a8e2a0a3f249">pipe</a>(<span class="keyword">struct</span> <a class="code" href="structthread.html">thread</a> *td, <span class="keyword">struct</span> <a class="code" href="structpipe__args.html">pipe_args</a> *uap) {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">struct </span><a class="code" href="structfile.html">file</a> *rf, *wf;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">int</span> <a class="code" href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">fd</a> = 0x0;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a>(td, &rf, &<a class="code" href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">fd</a>);</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  rf-><a class="code" href="structfile.html#ad549b6a207bd14d3a8a8f8b5c3ee1b9a">f_flag</a> = <a class="code" href="fcntl_8h.html#a3252b359359dea1efa45bb87c4499acd">FREAD</a> | <a class="code" href="fcntl_8h.html#a171aed9ee8e3ec0a65cedfb9a2626499">FWRITE</a>;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  td-><a class="code" href="structthread.html#af3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = <a class="code" href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">fd</a>;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a>(td, &wf, &<a class="code" href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">fd</a>);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  wf-><a class="code" href="structfile.html#ad549b6a207bd14d3a8a8f8b5c3ee1b9a">f_flag</a> = <a class="code" href="fcntl_8h.html#a3252b359359dea1efa45bb87c4499acd">FREAD</a> | <a class="code" href="fcntl_8h.html#a171aed9ee8e3ec0a65cedfb9a2626499">FWRITE</a>;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  td-><a class="code" href="structthread.html#af3ec0788a84e5cb640a1646d1347998a">td_retval</a>[1] = <a class="code" href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">fd</a>;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> (0x0);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">/***</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> END</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> ***/</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  </div>
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<div class="ttc" id="astructfile_html_ad549b6a207bd14d3a8a8f8b5c3ee1b9a"><div class="ttname"><a href="structfile.html#ad549b6a207bd14d3a8a8f8b5c3ee1b9a">file::f_flag</a></div><div class="ttdeci">uint32_t f_flag</div><div class="ttdef"><b>Definition:</b> <a href="descrip_8h_source.html#l00068">descrip.h:68</a></div></div>
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<div class="ttc" id="astructthread_html"><div class="ttname"><a href="structthread.html">thread</a></div><div class="ttdef"><b>Definition:</b> <a href="thread_8h_source.html#l00040">thread.h:40</a></div></div>
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<div class="ttc" id="adescrip_8h_html_a434fb15226182b0ee879a5afe9a8c190"><div class="ttname"><a href="descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a></div><div class="ttdeci">int falloc(struct thread *, struct file **, int *)</div><div class="ttdef"><b>Definition:</b> <a href="descrip_8c_source.html#l00096">descrip.c:96</a></div></div>
<div class="ttc" id="apipe_8h_html"><div class="ttname"><a href="pipe_8h.html">pipe.h</a></div></div>
<div class="ttc" id="afcntl_8h_html_a171aed9ee8e3ec0a65cedfb9a2626499"><div class="ttname"><a href="fcntl_8h.html#a171aed9ee8e3ec0a65cedfb9a2626499">FWRITE</a></div><div class="ttdeci">#define FWRITE</div><div class="ttdef"><b>Definition:</b> <a href="fcntl_8h_source.html#l00048">fcntl.h:48</a></div></div>
<div class="ttc" id="astructfile_html_af2108e4a1620fe81b2b5e7b6db5d41d4"><div class="ttname"><a href="structfile.html#af2108e4a1620fe81b2b5e7b6db5d41d4">file::fd</a></div><div class="ttdeci">fileDescriptor_t * fd</div><div class="ttdef"><b>Definition:</b> <a href="descrip_8h_source.html#l00071">descrip.h:71</a></div></div>
<div class="ttc" id="astructthread_html_af3ec0788a84e5cb640a1646d1347998a"><div class="ttname"><a href="structthread.html#af3ec0788a84e5cb640a1646d1347998a">thread::td_retval</a></div><div class="ttdeci">int td_retval[2]</div><div class="ttdef"><b>Definition:</b> <a href="thread_8h_source.html#l00041">thread.h:41</a></div></div>
<div class="ttc" id="akprintf_8h_html"><div class="ttname"><a href="kprintf_8h.html">kprintf.h</a></div></div>
<div class="ttc" id="afcntl_8h_html_a3252b359359dea1efa45bb87c4499acd"><div class="ttname"><a href="fcntl_8h.html#a3252b359359dea1efa45bb87c4499acd">FREAD</a></div><div class="ttdeci">#define FREAD</div><div class="ttdef"><b>Definition:</b> <a href="fcntl_8h_source.html#l00047">fcntl.h:47</a></div></div>
<div class="ttc" id="apipe_8c_html_acbd82ee803ba9432a295a8e2a0a3f249"><div class="ttname"><a href="pipe_8c.html#acbd82ee803ba9432a295a8e2a0a3f249">pipe</a></div><div class="ttdeci">int pipe(struct thread *td, struct pipe_args *uap)</div><div class="ttdef"><b>Definition:</b> <a href="pipe_8c_source.html#l00039">pipe.c:39</a></div></div>
<div class="ttc" id="adescrip_8h_html"><div class="ttname"><a href="descrip_8h.html">descrip.h</a></div></div>
<div class="ttc" id="astructpipe__args_html"><div class="ttname"><a href="structpipe__args.html">pipe_args</a></div><div class="ttdef"><b>Definition:</b> <a href="sysproto__posix_8h_source.html#l00349">sysproto_posix.h:349</a></div></div>
<div class="ttc" id="athread_8h_html"><div class="ttname"><a href="thread_8h.html">thread.h</a></div></div>
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