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/* |
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iom.h -- I/O multiplexor |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#ifndef VPE_IOM_H__ |
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#define VPE_IOM_H__ |
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|
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#include <vector> |
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|
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#include <cassert> |
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|
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#include <sys/poll.h> |
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|
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#include "callback.h" |
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#include "slog.h" |
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|
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typedef double tstamp; |
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|
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extern tstamp NOW; |
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|
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struct io_watcher; |
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struct time_watcher; |
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|
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class io_manager { |
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vector<pollfd> pfs; |
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vector<io_watcher *> iow; |
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vector<time_watcher *> tw; // actually a heap |
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|
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void idle_cb (time_watcher &w); time_watcher *idle; |
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public: |
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|
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void reschedule_time_watchers (); |
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|
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// register a watcher |
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void reg (io_watcher *w); |
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void unreg (io_watcher *w); |
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void reg (time_watcher *w); |
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void unreg (time_watcher *w); |
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|
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void loop (); |
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|
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io_manager (); |
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~io_manager (); |
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}; |
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|
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extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
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|
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struct io_watcher : callback2<void, io_watcher &, short> { |
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pollfd *p; |
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|
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template<class O1, class O2> |
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io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) |
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: callback2<void, io_watcher &, short>(object,method) |
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{ } |
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|
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~io_watcher (); |
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|
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void set(int fd, short events) |
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{ |
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assert (p); |
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p->fd = fd; |
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p->events = events; |
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} |
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|
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void set(short events) |
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{ |
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assert (p); |
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p->events = events; |
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} |
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|
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void start (int fd, short events) |
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{ |
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iom.reg (this); // make sure pfd is set |
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|
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p->fd = fd; |
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p->events = events; |
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} |
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|
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void stop () |
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{ |
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iom.unreg (this); |
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} |
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}; |
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|
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#define TSTAMP_CANCEL -1. |
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|
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struct time_watcher : callback1<void, time_watcher &> { |
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bool registered; // already registered? |
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tstamp at; |
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|
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template<class O1, class O2> |
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time_watcher (O1 *object, void (O2::*method)(time_watcher &)) |
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: callback1<void, time_watcher &>(object,method) |
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, registered(false) |
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{ } |
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|
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~time_watcher (); |
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|
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void set (tstamp when); |
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void trigger (); |
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|
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void operator ()() |
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{ |
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trigger (); |
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} |
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|
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void start (); |
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void start (tstamp when) |
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{ |
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set (when); |
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} |
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|
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void stop () |
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{ |
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iom.unreg (this); |
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} |
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|
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void reset (tstamp when = TSTAMP_CANCEL) |
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{ |
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stop (); |
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|
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at = when; |
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} |
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}; |
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|
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#endif |
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