1 | #| |
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2 | Copyright (c) 2006 Risto Laakso |
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3 | All rights reserved. |
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4 | |
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5 | Redistribution and use in source and binary forms, with or without |
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6 | modification, are permitted provided that the following conditions |
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7 | are met: |
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8 | 1. Redistributions of source code must retain the above copyright |
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9 | notice, this list of conditions and the following disclaimer. |
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10 | 2. Redistributions in binary form must reproduce the above copyright |
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11 | notice, this list of conditions and the following disclaimer in the |
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12 | documentation and/or other materials provided with the distribution. |
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13 | 3. The name of the author may not be used to endorse or promote products |
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14 | derived from this software without specific prior written permission. |
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15 | |
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16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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17 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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18 | OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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19 | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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20 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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21 | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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22 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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23 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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24 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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25 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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26 | |# |
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27 | (in-package :event-notification) |
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28 | |
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29 | #+linux |
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30 | (progn |
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31 | |
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32 | (defun make-event-queue () |
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33 | (%epoll-create 10)) |
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34 | |
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35 | |
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36 | (defun add-fd (event-queue fd mode &key (trigger :edge)) |
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37 | (with-foreign-object (ev 'epoll-event) |
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38 | (memzero ev +epoll-event-size+) |
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39 | |
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40 | (setf (foreign-slot-value ev 'epoll-event 'fd) fd |
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41 | (foreign-slot-value ev 'epoll-event 'events) |
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42 | (logior (if (eql :read mode) +epoll-in+ 0) |
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43 | (if (eql :write mode) +epoll-out+ 0) |
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44 | (if (eql trigger :edge) +epoll-et+))) |
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45 | |
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46 | (%epoll-ctl event-queue +epoll-ctl-add+ fd ev))) |
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47 | |
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48 | |
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49 | (defun remove-fd (event-queue fd mode) |
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50 | (with-foreign-object (ev 'epoll-event) |
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51 | (memzero ev +epoll-event-size+) |
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52 | |
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53 | (setf (foreign-slot-value ev 'epoll-event 'fd) fd) |
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54 | |
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55 | (%epoll-ctl event-queue +epoll-ctl-del+ fd ev))) |
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56 | |
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57 | |
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58 | (define-condition poll-error (error) ()) |
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59 | |
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60 | (defun poll-events (event-queue) |
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61 | (with-foreign-object (events 'epoll-event 10) |
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62 | (memzero events (* +epoll-event-size+ 10)) |
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63 | (loop for res = (%epoll-wait event-queue events 10 -1) |
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64 | do |
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65 | (case res |
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66 | (-1 (error 'poll-error)) |
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67 | (0 nil) |
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68 | (t |
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69 | (let ((idents nil)) |
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70 | (loop for i from 0 below res do |
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71 | (push (foreign-slot-value |
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72 | (mem-aref events 'epoll-event i) |
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73 | 'epoll-event 'fd) |
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74 | idents)) |
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75 | (return idents))))))) |
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76 | |
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77 | |
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78 | ) |
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