| 1 |
#ifndef EVPP_H__ |
| 2 |
#define EVPP_H__ |
| 3 |
|
| 4 |
/* work in progress, don't use unless you know what you are doing */ |
| 5 |
|
| 6 |
namespace ev { |
| 7 |
|
| 8 |
template<class watcher> |
| 9 |
class callback |
| 10 |
{ |
| 11 |
struct object { }; |
| 12 |
|
| 13 |
void *obj; |
| 14 |
void (object::*meth)(watcher &, int); |
| 15 |
|
| 16 |
/* a proxy is a kind of recipe on how to call a specific class method */ |
| 17 |
struct proxy_base { |
| 18 |
virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0; |
| 19 |
}; |
| 20 |
template<class O1, class O2> |
| 21 |
struct proxy : proxy_base { |
| 22 |
virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const |
| 23 |
{ |
| 24 |
((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) |
| 25 |
(w, e); |
| 26 |
} |
| 27 |
}; |
| 28 |
|
| 29 |
proxy_base *prxy; |
| 30 |
|
| 31 |
public: |
| 32 |
template<class O1, class O2> |
| 33 |
explicit callback (O1 *object, void (O2::*method)(watcher &, int)) |
| 34 |
{ |
| 35 |
static proxy<O1,O2> p; |
| 36 |
obj = reinterpret_cast<void *>(object); |
| 37 |
meth = reinterpret_cast<void (object::*)(watcher &, int)>(method); |
| 38 |
prxy = &p; |
| 39 |
} |
| 40 |
|
| 41 |
void call (watcher *w, int e) const |
| 42 |
{ |
| 43 |
return prxy->call (obj, meth, *w, e); |
| 44 |
} |
| 45 |
}; |
| 46 |
|
| 47 |
#include "ev.h" |
| 48 |
|
| 49 |
enum { |
| 50 |
UNDEF = EV_UNDEF, |
| 51 |
NONE = EV_NONE, |
| 52 |
READ = EV_READ, |
| 53 |
WRITE = EV_WRITE, |
| 54 |
TIMEOUT = EV_TIMEOUT, |
| 55 |
PERIODIC = EV_PERIODIC, |
| 56 |
SIGNAL = EV_SIGNAL, |
| 57 |
IDLE = EV_IDLE, |
| 58 |
CHECK = EV_CHECK, |
| 59 |
PREPARE = EV_PREPARE, |
| 60 |
CHILD = EV_CHILD, |
| 61 |
ERROR = EV_ERROR, |
| 62 |
}; |
| 63 |
|
| 64 |
typedef ev_tstamp tstamp; |
| 65 |
|
| 66 |
inline ev_tstamp now (EV_P) |
| 67 |
{ |
| 68 |
return ev_now (EV_A); |
| 69 |
} |
| 70 |
|
| 71 |
#if EV_MULTIPLICITY |
| 72 |
|
| 73 |
#define EV_CONSTRUCT(cppstem) \ |
| 74 |
EV_P; \ |
| 75 |
\ |
| 76 |
void set (EV_P) \ |
| 77 |
{ \ |
| 78 |
this->EV_A = EV_A; \ |
| 79 |
} \ |
| 80 |
\ |
| 81 |
template<class O1, class O2> \ |
| 82 |
explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \ |
| 83 |
: callback<cppstem> (object, method), EV_A (EV_A) |
| 84 |
|
| 85 |
#else |
| 86 |
|
| 87 |
#define EV_CONSTRUCT(cppstem) \ |
| 88 |
template<class O1, class O2> \ |
| 89 |
explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ |
| 90 |
: callback<cppstem> (object, method) |
| 91 |
|
| 92 |
#endif |
| 93 |
|
| 94 |
/* using a template here would require quite a bit more lines, |
| 95 |
* so a macro solution was chosen */ |
| 96 |
#define EV_DECLARE_WATCHER(cppstem,cstem) \ |
| 97 |
\ |
| 98 |
extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \ |
| 99 |
\ |
| 100 |
struct cppstem : ev_ ## cstem, callback<cppstem> \ |
| 101 |
{ \ |
| 102 |
EV_CONSTRUCT (cppstem) \ |
| 103 |
{ \ |
| 104 |
ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \ |
| 105 |
} \ |
| 106 |
\ |
| 107 |
bool is_active () const \ |
| 108 |
{ \ |
| 109 |
return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ |
| 110 |
} \ |
| 111 |
\ |
| 112 |
bool is_pending () const \ |
| 113 |
{ \ |
| 114 |
return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \ |
| 115 |
} \ |
| 116 |
\ |
| 117 |
void start () \ |
| 118 |
{ \ |
| 119 |
ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
| 120 |
} \ |
| 121 |
\ |
| 122 |
void stop () \ |
| 123 |
{ \ |
| 124 |
ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
| 125 |
} \ |
| 126 |
\ |
| 127 |
void operator ()(int events = EV_UNDEF) \ |
| 128 |
{ \ |
| 129 |
return call (this, events); \ |
| 130 |
} \ |
| 131 |
\ |
| 132 |
~cppstem () \ |
| 133 |
{ \ |
| 134 |
stop (); \ |
| 135 |
} \ |
| 136 |
\ |
| 137 |
private: \ |
| 138 |
\ |
| 139 |
cppstem (const cppstem &o) \ |
| 140 |
: callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ |
| 141 |
{ /* disabled */ } \ |
| 142 |
void operator =(const cppstem &o) { /* disabled */ } \ |
| 143 |
\ |
| 144 |
public: |
| 145 |
|
| 146 |
EV_DECLARE_WATCHER (io, io) |
| 147 |
void set (int fd, int events) |
| 148 |
{ |
| 149 |
int active = is_active (); |
| 150 |
if (active) stop (); |
| 151 |
ev_io_set (static_cast<ev_io *>(this), fd, events); |
| 152 |
if (active) start (); |
| 153 |
} |
| 154 |
|
| 155 |
void set (int events) |
| 156 |
{ |
| 157 |
int active = is_active (); |
| 158 |
if (active) stop (); |
| 159 |
ev_io_set (static_cast<ev_io *>(this), fd, events); |
| 160 |
if (active) start (); |
| 161 |
} |
| 162 |
|
| 163 |
void start (int fd, int events) |
| 164 |
{ |
| 165 |
set (fd, events); |
| 166 |
start (); |
| 167 |
} |
| 168 |
}; |
| 169 |
|
| 170 |
EV_DECLARE_WATCHER (timer, timer) |
| 171 |
void set (ev_tstamp after, ev_tstamp repeat = 0.) |
| 172 |
{ |
| 173 |
int active = is_active (); |
| 174 |
if (active) stop (); |
| 175 |
ev_timer_set (static_cast<ev_timer *>(this), after, repeat); |
| 176 |
if (active) start (); |
| 177 |
} |
| 178 |
|
| 179 |
void start (ev_tstamp after, ev_tstamp repeat = 0.) |
| 180 |
{ |
| 181 |
set (after, repeat); |
| 182 |
start (); |
| 183 |
} |
| 184 |
|
| 185 |
void again () |
| 186 |
{ |
| 187 |
ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
| 188 |
} |
| 189 |
}; |
| 190 |
|
| 191 |
#if EV_PERIODICS |
| 192 |
EV_DECLARE_WATCHER (periodic, periodic) |
| 193 |
void set (ev_tstamp at, ev_tstamp interval = 0.) |
| 194 |
{ |
| 195 |
int active = is_active (); |
| 196 |
if (active) stop (); |
| 197 |
ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); |
| 198 |
if (active) start (); |
| 199 |
} |
| 200 |
|
| 201 |
void start (ev_tstamp at, ev_tstamp interval = 0.) |
| 202 |
{ |
| 203 |
set (at, interval); |
| 204 |
start (); |
| 205 |
} |
| 206 |
|
| 207 |
void again () |
| 208 |
{ |
| 209 |
ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
| 210 |
} |
| 211 |
}; |
| 212 |
#endif |
| 213 |
|
| 214 |
EV_DECLARE_WATCHER (idle, idle) |
| 215 |
}; |
| 216 |
|
| 217 |
EV_DECLARE_WATCHER (prepare, prepare) |
| 218 |
}; |
| 219 |
|
| 220 |
EV_DECLARE_WATCHER (check, check) |
| 221 |
}; |
| 222 |
|
| 223 |
EV_DECLARE_WATCHER (sig, signal) |
| 224 |
void set (int signum) |
| 225 |
{ |
| 226 |
int active = is_active (); |
| 227 |
if (active) stop (); |
| 228 |
ev_signal_set (static_cast<ev_signal *>(this), signum); |
| 229 |
if (active) start (); |
| 230 |
} |
| 231 |
|
| 232 |
void start (int signum) |
| 233 |
{ |
| 234 |
set (signum); |
| 235 |
start (); |
| 236 |
} |
| 237 |
}; |
| 238 |
|
| 239 |
EV_DECLARE_WATCHER (child, child) |
| 240 |
void set (int pid) |
| 241 |
{ |
| 242 |
int active = is_active (); |
| 243 |
if (active) stop (); |
| 244 |
ev_child_set (static_cast<ev_child *>(this), pid); |
| 245 |
if (active) start (); |
| 246 |
} |
| 247 |
|
| 248 |
void start (int pid) |
| 249 |
{ |
| 250 |
set (pid); |
| 251 |
start (); |
| 252 |
} |
| 253 |
}; |
| 254 |
|
| 255 |
#undef EV_CONSTRUCT |
| 256 |
#undef EV_DECLARE_WATCHER |
| 257 |
} |
| 258 |
|
| 259 |
#endif |
| 260 |
|
