| 1 |
/* |
| 2 |
iom.h -- I/O multiplexor |
| 3 |
|
| 4 |
This program is free software; you can redistribute it and/or modify |
| 5 |
it under the terms of the GNU General Public License as published by |
| 6 |
the Free Software Foundation; either version 2 of the License, or |
| 7 |
(at your option) any later version. |
| 8 |
|
| 9 |
This program is distributed in the hope that it will be useful, |
| 10 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 |
GNU General Public License for more details. |
| 13 |
|
| 14 |
You should have received a copy of the GNU General Public License |
| 15 |
along with this program; if not, write to the Free Software |
| 16 |
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 |
*/ |
| 18 |
|
| 19 |
#ifndef VPE_IOM_H__ |
| 20 |
#define VPE_IOM_H__ |
| 21 |
|
| 22 |
#include <vector> |
| 23 |
|
| 24 |
#include <sys/poll.h> |
| 25 |
|
| 26 |
#include "callback.h" |
| 27 |
#include "slog.h" |
| 28 |
|
| 29 |
typedef double tstamp; |
| 30 |
|
| 31 |
extern tstamp NOW; |
| 32 |
|
| 33 |
struct io_watcher; |
| 34 |
struct time_watcher; |
| 35 |
|
| 36 |
class io_manager { |
| 37 |
vector<pollfd> pfs; |
| 38 |
vector<const io_watcher *> iow; |
| 39 |
vector<time_watcher *> tw; // actually a heap |
| 40 |
|
| 41 |
void idle_cb (tstamp &ts); time_watcher *idle; |
| 42 |
public: |
| 43 |
|
| 44 |
void reschedule_time_watchers (); |
| 45 |
|
| 46 |
// register a watcher |
| 47 |
void reg (int fd, short events, io_watcher *w); |
| 48 |
void unreg (io_watcher *w); |
| 49 |
void reg (time_watcher *w); |
| 50 |
void unreg (time_watcher *w); |
| 51 |
|
| 52 |
void loop (); |
| 53 |
|
| 54 |
io_manager (); |
| 55 |
~io_manager (); |
| 56 |
}; |
| 57 |
|
| 58 |
extern io_manager iom; |
| 59 |
|
| 60 |
struct io_watcher : callback<void, short> { |
| 61 |
template<class O1, class O2> |
| 62 |
io_watcher (O1 *object, void (O2::*method)(short revents)) |
| 63 |
: callback<void, short>(object,method) |
| 64 |
{ } |
| 65 |
|
| 66 |
~io_watcher () |
| 67 |
{ |
| 68 |
iom.unreg (this); |
| 69 |
} |
| 70 |
|
| 71 |
void start (int fd, short events) |
| 72 |
{ |
| 73 |
iom.reg (fd, events, this); |
| 74 |
} |
| 75 |
|
| 76 |
void stop () |
| 77 |
{ |
| 78 |
iom.unreg (this); |
| 79 |
} |
| 80 |
}; |
| 81 |
|
| 82 |
#define TSTAMP_CANCEL -1. |
| 83 |
|
| 84 |
struct time_watcher : callback<void, tstamp &> { |
| 85 |
bool registered; // already registered? |
| 86 |
tstamp at; |
| 87 |
|
| 88 |
template<class O1, class O2> |
| 89 |
time_watcher (O1 *object, void (O2::*method)(tstamp &)) |
| 90 |
: callback<void, tstamp &>(object,method) |
| 91 |
, registered(false) |
| 92 |
{ } |
| 93 |
|
| 94 |
~time_watcher () |
| 95 |
{ |
| 96 |
iom.unreg (this); |
| 97 |
} |
| 98 |
|
| 99 |
void set (tstamp when); |
| 100 |
void trigger (); |
| 101 |
|
| 102 |
void operator ()() |
| 103 |
{ |
| 104 |
trigger (); |
| 105 |
} |
| 106 |
|
| 107 |
void start (); |
| 108 |
void start (tstamp when) |
| 109 |
{ |
| 110 |
set (when); |
| 111 |
} |
| 112 |
|
| 113 |
void stop () |
| 114 |
{ |
| 115 |
iom.unreg (this); |
| 116 |
} |
| 117 |
|
| 118 |
void reset (tstamp when = TSTAMP_CANCEL) |
| 119 |
{ |
| 120 |
stop (); |
| 121 |
at = when; |
| 122 |
} |
| 123 |
}; |
| 124 |
|
| 125 |
#endif |
| 126 |
|
