server/include/cfperl.h

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

//
// cfperl.h perl interface
//
#ifndef CFPERL_H__
#define CFPERL_H__

using namespace std;

#include <EXTERN.h>
#include <perl.h>
#include <XSUB.h>

#include <EVAPI.h>
#include <CoroAPI.h>

#include "util.h"
#include "keyword.h"
#include "dynbuf.h"
#include "callback.h"

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// optimisations/workaround for functions requiring my_perl in scope (anti-bloat)
#undef localtime
#undef srand48
#undef drand48
#undef srandom
#undef opendir
#undef readdir
#undef closedir
#undef getprotobyname
#undef gethostbyname
#undef ctime
#undef strerror
#undef _

// same here, massive symbol spamming
#undef do_open
#undef do_close
#undef ref
#undef seed

// perl bug #40256: perl does overwrite those with reentrant versions
// but does not initialise their state structures.
#undef random
#undef crypt

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#define _(msg)  (msg)
#define N_(msg) (msg)

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// some macros to simplify perl in-calls

#define CHECK_ERROR                     \
  if (SvTRUE (ERRSV))                   \
    LOG (llevError, "runtime error in %s: %s", __func__, SvPVutf8_nolen (ERRSV));

inline int call_pvsv (const char *ob, I32 flags) { return call_pv (ob, flags); }
inline int call_pvsv (SV         *ob, I32 flags) { return call_sv (ob, flags); }

// TODO: temporarily enabled pushstack/popstack for all calls from the core, to maybe fix object memleak?
#define CALL_PUSH PUSHSTACKi (PERLSI_UNKNOWN)
#define CALL_POP  PUTBACK; POPSTACK; SPAGAIN
#define CALL_BEGIN(args) dSP; CALL_PUSH; ENTER; SAVETMPS; PUSHMARK (SP); EXTEND (SP, args)
#define CALL_ARG_SV(sv) PUSHs (sv_2mortal (sv)) // separate because no refcount inc
#define CALL_ARG(expr) PUSHs (sv_2mortal (to_sv (expr)))
#define CALL_CALL(name, flags) PUTBACK; int count = call_pvsv (name, (flags) | G_EVAL); SPAGAIN;
#define CALL_END PUTBACK; CHECK_ERROR; FREETMPS; LEAVE; CALL_POP

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

void cfperl_init ();
void cfperl_main ();
void cfperl_tick ();
void cfperl_emergency_save ();
void cfperl_cleanup (int make_core);
void cfperl_make_book (object *book, int level);
void cfperl_send_msg (client *ns, int color, const_utf8_string type, const_utf8_string msg);
int cfperl_can_merge (object *ob1, object *ob2);
void cfperl_mapscript_activate (object *ob, int state, object *activator, object *originator = 0);

bool is_match_expr (const_utf8_string expr);
// applies the match expression and returns true if it matches
bool match (const_utf8_string expr, object *ob, object *self = 0, object *source = 0, object *originator = 0);
// same as above, but returns the first object found, or 0
object *match_one (const_utf8_string expr, object *ob, object *self = 0, object *source = 0, object *originator = 0);

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#if IVSIZE >= 8
  typedef IV val64;
  typedef IV uval64;
# define newSVval64 newSViv
# define SvVAL64 SvIV
# define newSVuval64 newSVuv
# define SvUVAL64 SvUV
#else
  typedef double val64;
  typedef double uval64;
# define newSVval64 newSVnv
# define SvVAL64 SvNV
# define newSVuval64 newSVnv
# define SvUVAL64 SvNV
#endif

extern tstamp runtime; // virtual server time, excluding time jumps and lag
extern tstamp NOW;     // real time of current server tick

noinline utf8_string cfSvPVutf8_nolen (SV *sv);

enum event_klass
{
  KLASS_NONE,
  KLASS_GLOBAL,
  KLASS_ATTACHABLE,
  KLASS_CLIENT,
  KLASS_PLAYER,
  KLASS_OBJECT,
  KLASS_MAP,
  KLASS_COMMAND,
};

enum event_type
{
# define def(klass,name) EVENT_ ## klass ## _ ## name,
#  include "eventinc.h"
# undef def
  NUM_EVENT_TYPES
};

// in which global events or per-type events are we interested
extern bitset<NUM_EVENT_TYPES> ev_want_event;
extern bitset<NUM_TYPES>       ev_want_type;

#define ARG_AV(o)         DT_AV    , static_cast<AV *>   (o)
#define ARG_INT(v)        DT_INT   , static_cast<int>    (v)
#define ARG_INT64(v)      DT_INT64 , static_cast<sint64> (v)
#define ARG_DOUBLE(v)     DT_DOUBLE, static_cast<double> (v)
#define ARG_STRING(v)     DT_STRING, static_cast<const char *> (v)
#define ARG_DATA(s,l)     DT_DATA  , static_cast<const void *> (s), int (l)
#define ARG_OBJECT(o)     DT_OBJECT, (void *)(static_cast<object *>    (o))
#define ARG_MAP(o)        DT_MAP   , (void *)(static_cast<maptile *>   (o))
#define ARG_PLAYER(o)     DT_PLAYER, (void *)(static_cast<player *>    (o))
#define ARG_ARCH(o)       DT_ARCH  , (void *)(static_cast<archetype *> (o))
#define ARG_CLIENT(o)     DT_CLIENT, (void *)(static_cast<client *>    (o))
#define ARG_PARTY(o)      DT_PARTY , (void *)(static_cast<party *>     (o))
#define ARG_REGION(o)     DT_REGION, (void *)(static_cast<region *>    (o))

// the ", ## __VA_ARGS" is, unfortunately, a gnu-cpp extension
#define INVOKE(obj,event, ...) (expect_false ((obj)->should_invoke (event)) ? (obj)->invoke (event, ## __VA_ARGS__, DT_END) : 0)
#define INVOKE_GLOBAL(event, ...)          INVOKE (&gbl_ev, EVENT_ ## GLOBAL     ## _ ## event, ## __VA_ARGS__)
#define INVOKE_ATTACHABLE(event, obj, ...) INVOKE (obj    , EVENT_ ## ATTACHABLE ## _ ## event, ## __VA_ARGS__)
#define INVOKE_OBJECT(event, obj, ...)     INVOKE (obj    , EVENT_ ## OBJECT     ## _ ## event, ## __VA_ARGS__)
#define INVOKE_CLIENT(event, obj, ...)     INVOKE (obj    , EVENT_ ## CLIENT     ## _ ## event, ## __VA_ARGS__)
#define INVOKE_PLAYER(event, obj, ...)     INVOKE (obj    , EVENT_ ## PLAYER     ## _ ## event, ## __VA_ARGS__)
#define INVOKE_MAP(event, obj, ...)        INVOKE (obj    , EVENT_ ## MAP        ## _ ## event, ## __VA_ARGS__)

//TODO should index into @result
#define RESULT(idx,type) cfperl_result_ ## type (idx)
#define RESULT_DOUBLE(idx) RESULT(idx, DOUBLE)
#define RESULT_INT(idx)    RESULT(idx, INT)

double cfperl_result_DOUBLE (int idx);
int cfperl_result_INT (int idx);

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

INTERFACE_CLASS (attachable)
struct attachable : refcnt_base
{
  static MGVTBL vtbl;

  enum {
    F_DESTROYED   = 0x01,
    F_DEBUG_TRACE = 0x02,
  };
  uint8 ACC (RW, attachable_flags);

  static unordered_vector<attachable *> mortals;
  MTH static void check_mortals ();

  // object is delete'd after the refcount reaches 0
  MTH int refcnt_cnt () const;
  // check wether the object has died and destroy
  MTH void refcnt_chk () { if (expect_false (refcnt <= 0)) do_check (); }

  // destroy the object unless it was already destroyed
  // this politely asks everybody interested the reduce
  // the refcount to 0 as soon as possible.
  MTH void destroy ();

  // return wether an object was destroyed already
  MTH bool destroyed () const { return attachable_flags & F_DESTROYED; }

  // destruct and free the memory for this object
  virtual void do_delete ();

  virtual void gather_callbacks (AV *&callbacks, event_type event) const;

#if 0
private:
  static refcounted *rc_first;
  refcounted *rc_next;
#endif

  HV *self;     // CF+ perl self
  AV *cb;       // CF+ callbacks
  shstr attach; // generic extension attachment information

  void sever_self (); // sever this object from its self, if it has one.
  void optimise ();   // possibly save some memory by destroying unneeded data

  attachable ()
  : attachable_flags (0), self (0), cb (0), attach (0)
  {
  }

  attachable (const attachable &src)
  : attachable_flags (0), self (0), cb (0), attach (src.attach)
  {
  }

  // set a custom key to the given value, or delete it if value = 0
  void set_key (const_utf8_string key, const_utf8_string value = 0, bool is_utf8 = 0);

  void set_key_text (const_utf8_string key, const_utf8_string value = 0)
  {
    set_key (key, value, 1);
  }

  void set_key_data (const_utf8_string key, const_utf8_string value = 0)
  {
    set_key (key, value, 0);
  }

  attachable &operator =(const attachable &src);

  // used to _quickly_ decide wether to shortcut the evaluation
  bool should_invoke (event_type event)
  {
    return ev_want_event [event] || cb;
  }

  bool invoke (event_type event, ...);

  MTH void instantiate ();
  void reattach ();

protected:
  // do the real refcount checking work
  void do_check ();

  // the method that does the real destroy work
  virtual void do_destroy ();

  // destructor is protected, should not be called by anybody
  virtual ~attachable ();
};

// the global object is a pseudo object that cares for the global events
struct global : attachable
{
  void gather_callbacks (AV *&callbacks, event_type event) const;
};

extern struct global gbl_ev;

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#include "freezethaw.h"

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

struct coroapi {
  static struct CoroAPI *GCoroAPI;

  static EV_ATOMIC_T cede_pending;

  static int nready () {                   return CORO_NREADY; }
  static int cede   () { cede_pending = 0; return CORO_CEDE  ; }

  static void do_cede_to_tick ();

  // actually cede's far more often
  static bool cede_to_tick ()
  {
    if (expect_true (!cede_pending))
      return false;

    do_cede_to_tick ();
    return true;
  }

  static void wait_for_tick ();
  static void wait_for_tick_begin ();
};

struct evapi
{
  static struct EVAPI *GEVAPI;
};

struct iow : ev_io, evapi, callback<void (iow &, int)>
{
  static void thunk (EV_P_ struct ev_io *w_, int revents)
  {
    iow &w = *static_cast<iow *>(w_);
    
    w (w, revents);
  }

  template<class O, class M>
  iow (O object, M method)
  : callback<void (iow &, int)> (object, method)
  {
    ev_init ((ev_io *)this, thunk);
  }

  void prio (int prio)
  {
    ev_set_priority ((ev_io *)this, prio);
  }

  void set (int fd, int events)
  {
    ev_io_set ((ev_io *)this, fd, events);
  }

  int poll () const { return events; }

  void poll (int events);

  void start ()
  {
    ev_io_start (EV_DEFAULT, (ev_io *)this);
  }

  void stop ()
  {
    ev_io_stop (EV_DEFAULT, (ev_io *)this);
  }

  ~iow ()
  {
    stop ();
  }
};

struct asyncw : ev_async, evapi, callback<void (ev_async &, int)>
{
  static void thunk (EV_P_ struct ev_async *w_, int revents)
  {
    asyncw &w = *static_cast<asyncw *>(w_);
    
    w (w, revents);
  }

  template<class O, class M>
  asyncw (O object, M method)
  : callback<void (asyncw &, int)> (object, method)
  {
    ev_init ((ev_async *)this, thunk);
  }

  void start ()
  {
    ev_async_start (EV_DEFAULT, (ev_async *)this);
  }

  void stop ()
  {
    ev_async_stop (EV_DEFAULT, (ev_async *)this);
  }

  ~asyncw ()
  {
    stop ();
  }
};

#endif

Revision:	1.123
Committed:	Sat Jun 26 22:10:18 2010 UTC (13 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.122:	+2 -0 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	*
6	* Deliantra is free software: you can redistribute it and/or modify it under
7	* the terms of the Affero GNU General Public License as published by the
8	* Free Software Foundation, either version 3 of the License, or (at your
9	* option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the Affero GNU General Public License
17	* and the GNU General Public License along with this program. If not, see
18	* <http://www.gnu.org/licenses/>.
19	*
20	* The authors can be reached via e-mail to <support@deliantra.net>
21	*/
22
23	//
24	// cfperl.h perl interface
25	//
26	#ifndef CFPERL_H__
27	#define CFPERL_H__
28
29	using namespace std;
30
31	#include <EXTERN.h>
32	#include <perl.h>
33	#include <XSUB.h>
34
35	#include <EVAPI.h>
36	#include <CoroAPI.h>
37
38	#include "util.h"
39	#include "keyword.h"
40	#include "dynbuf.h"
41	#include "callback.h"
42
43	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
44
45	// optimisations/workaround for functions requiring my_perl in scope (anti-bloat)
46	#undef localtime
47	#undef srand48
48	#undef drand48
49	#undef srandom
50	#undef opendir
51	#undef readdir
52	#undef closedir
53	#undef getprotobyname
54	#undef gethostbyname
55	#undef ctime
56	#undef strerror
57	#undef _
58
59	// same here, massive symbol spamming
60	#undef do_open
61	#undef do_close
62	#undef ref
63	#undef seed
64
65	// perl bug #40256: perl does overwrite those with reentrant versions
66	// but does not initialise their state structures.
67	#undef random
68	#undef crypt
69
70	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
71
72	#define _(msg) (msg)
73	#define N_(msg) (msg)
74
75	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
76
77	// some macros to simplify perl in-calls
78
79	#define CHECK_ERROR \
80	if (SvTRUE (ERRSV)) \
81	LOG (llevError, "runtime error in %s: %s", __func__, SvPVutf8_nolen (ERRSV));
82
83	inline int call_pvsv (const char *ob, I32 flags) { return call_pv (ob, flags); }
84	inline int call_pvsv (SV *ob, I32 flags) { return call_sv (ob, flags); }
85
86	// TODO: temporarily enabled pushstack/popstack for all calls from the core, to maybe fix object memleak?
87	#define CALL_PUSH PUSHSTACKi (PERLSI_UNKNOWN)
88	#define CALL_POP PUTBACK; POPSTACK; SPAGAIN
89	#define CALL_BEGIN(args) dSP; CALL_PUSH; ENTER; SAVETMPS; PUSHMARK (SP); EXTEND (SP, args)
90	#define CALL_ARG_SV(sv) PUSHs (sv_2mortal (sv)) // separate because no refcount inc
91	#define CALL_ARG(expr) PUSHs (sv_2mortal (to_sv (expr)))
92	#define CALL_CALL(name, flags) PUTBACK; int count = call_pvsv (name, (flags) \| G_EVAL); SPAGAIN;
93	#define CALL_END PUTBACK; CHECK_ERROR; FREETMPS; LEAVE; CALL_POP
94
95	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
96
97	void cfperl_init ();
98	void cfperl_main ();
99	void cfperl_tick ();
100	void cfperl_emergency_save ();
101	void cfperl_cleanup (int make_core);
102	void cfperl_make_book (object *book, int level);
103	void cfperl_send_msg (client *ns, int color, const_utf8_string type, const_utf8_string msg);
104	int cfperl_can_merge (object ob1, object ob2);
105	void cfperl_mapscript_activate (object ob, int state, object activator, object *originator = 0);
106
107	bool is_match_expr (const_utf8_string expr);
108	// applies the match expression and returns true if it matches
109	bool match (const_utf8_string expr, object ob, object self = 0, object source = 0, object originator = 0);
110	// same as above, but returns the first object found, or 0
111	object match_one (const_utf8_string expr, object ob, object self = 0, object source = 0, object *originator = 0);
112
113	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
114
115	#if IVSIZE >= 8
116	typedef IV val64;
117	typedef IV uval64;
118	# define newSVval64 newSViv
119	# define SvVAL64 SvIV
120	# define newSVuval64 newSVuv
121	# define SvUVAL64 SvUV
122	#else
123	typedef double val64;
124	typedef double uval64;
125	# define newSVval64 newSVnv
126	# define SvVAL64 SvNV
127	# define newSVuval64 newSVnv
128	# define SvUVAL64 SvNV
129	#endif
130
131	extern tstamp runtime; // virtual server time, excluding time jumps and lag
132	extern tstamp NOW; // real time of current server tick
133
134	noinline utf8_string cfSvPVutf8_nolen (SV *sv);
135
136	enum event_klass
137	{
138	KLASS_NONE,
139	KLASS_GLOBAL,
140	KLASS_ATTACHABLE,
141	KLASS_CLIENT,
142	KLASS_PLAYER,
143	KLASS_OBJECT,
144	KLASS_MAP,
145	KLASS_COMMAND,
146	};
147
148	enum event_type
149	{
150	# define def(klass,name) EVENT_ ## klass ## _ ## name,
151	# include "eventinc.h"
152	# undef def
153	NUM_EVENT_TYPES
154	};
155
156	// in which global events or per-type events are we interested
157	extern bitset<NUM_EVENT_TYPES> ev_want_event;
158	extern bitset<NUM_TYPES> ev_want_type;
159
160	#define ARG_AV(o) DT_AV , static_cast<AV *> (o)
161	#define ARG_INT(v) DT_INT , static_cast<int> (v)
162	#define ARG_INT64(v) DT_INT64 , static_cast<sint64> (v)
163	#define ARG_DOUBLE(v) DT_DOUBLE, static_cast<double> (v)
164	#define ARG_STRING(v) DT_STRING, static_cast<const char *> (v)
165	#define ARG_DATA(s,l) DT_DATA , static_cast<const void *> (s), int (l)
166	#define ARG_OBJECT(o) DT_OBJECT, (void )(static_cast<object > (o))
167	#define ARG_MAP(o) DT_MAP , (void )(static_cast<maptile > (o))
168	#define ARG_PLAYER(o) DT_PLAYER, (void )(static_cast<player > (o))
169	#define ARG_ARCH(o) DT_ARCH , (void )(static_cast<archetype > (o))
170	#define ARG_CLIENT(o) DT_CLIENT, (void )(static_cast<client > (o))
171	#define ARG_PARTY(o) DT_PARTY , (void )(static_cast<party > (o))
172	#define ARG_REGION(o) DT_REGION, (void )(static_cast<region > (o))
173
174	// the ", ## __VA_ARGS" is, unfortunately, a gnu-cpp extension
175	#define INVOKE(obj,event, ...) (expect_false ((obj)->should_invoke (event)) ? (obj)->invoke (event, ## __VA_ARGS__, DT_END) : 0)
176	#define INVOKE_GLOBAL(event, ...) INVOKE (&gbl_ev, EVENT_ ## GLOBAL ## _ ## event, ## __VA_ARGS__)
177	#define INVOKE_ATTACHABLE(event, obj, ...) INVOKE (obj , EVENT_ ## ATTACHABLE ## _ ## event, ## __VA_ARGS__)
178	#define INVOKE_OBJECT(event, obj, ...) INVOKE (obj , EVENT_ ## OBJECT ## _ ## event, ## __VA_ARGS__)
179	#define INVOKE_CLIENT(event, obj, ...) INVOKE (obj , EVENT_ ## CLIENT ## _ ## event, ## __VA_ARGS__)
180	#define INVOKE_PLAYER(event, obj, ...) INVOKE (obj , EVENT_ ## PLAYER ## _ ## event, ## __VA_ARGS__)
181	#define INVOKE_MAP(event, obj, ...) INVOKE (obj , EVENT_ ## MAP ## _ ## event, ## __VA_ARGS__)
182
183	//TODO should index into @result
184	#define RESULT(idx,type) cfperl_result_ ## type (idx)
185	#define RESULT_DOUBLE(idx) RESULT(idx, DOUBLE)
186	#define RESULT_INT(idx) RESULT(idx, INT)
187
188	double cfperl_result_DOUBLE (int idx);
189	int cfperl_result_INT (int idx);
190
191	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
192
193	INTERFACE_CLASS (attachable)
194	struct attachable : refcnt_base
195	{
196	static MGVTBL vtbl;
197
198	enum {
199	F_DESTROYED = 0x01,
200	F_DEBUG_TRACE = 0x02,
201	};
202	uint8 ACC (RW, attachable_flags);
203
204	static unordered_vector<attachable *> mortals;
205	MTH static void check_mortals ();
206
207	// object is delete'd after the refcount reaches 0
208	MTH int refcnt_cnt () const;
209	// check wether the object has died and destroy
210	MTH void refcnt_chk () { if (expect_false (refcnt <= 0)) do_check (); }
211
212	// destroy the object unless it was already destroyed
213	// this politely asks everybody interested the reduce
214	// the refcount to 0 as soon as possible.
215	MTH void destroy ();
216
217	// return wether an object was destroyed already
218	MTH bool destroyed () const { return attachable_flags & F_DESTROYED; }
219
220	// destruct and free the memory for this object
221	virtual void do_delete ();
222
223	virtual void gather_callbacks (AV *&callbacks, event_type event) const;
224
225	#if 0
226	private:
227	static refcounted *rc_first;
228	refcounted *rc_next;
229	#endif
230
231	HV *self; // CF+ perl self
232	AV *cb; // CF+ callbacks
233	shstr attach; // generic extension attachment information
234
235	void sever_self (); // sever this object from its self, if it has one.
236	void optimise (); // possibly save some memory by destroying unneeded data
237
238	attachable ()
239	: attachable_flags (0), self (0), cb (0), attach (0)
240	{
241	}
242
243	attachable (const attachable &src)
244	: attachable_flags (0), self (0), cb (0), attach (src.attach)
245	{
246	}
247
248	// set a custom key to the given value, or delete it if value = 0
249	void set_key (const_utf8_string key, const_utf8_string value = 0, bool is_utf8 = 0);
250
251	void set_key_text (const_utf8_string key, const_utf8_string value = 0)
252	{
253	set_key (key, value, 1);
254	}
255
256	void set_key_data (const_utf8_string key, const_utf8_string value = 0)
257	{
258	set_key (key, value, 0);
259	}
260
261	attachable &operator =(const attachable &src);
262
263	// used to _quickly_ decide wether to shortcut the evaluation
264	bool should_invoke (event_type event)
265	{
266	return ev_want_event [event] \|\| cb;
267	}
268
269	bool invoke (event_type event, ...);
270
271	MTH void instantiate ();
272	void reattach ();
273
274	protected:
275	// do the real refcount checking work
276	void do_check ();
277
278	// the method that does the real destroy work
279	virtual void do_destroy ();
280
281	// destructor is protected, should not be called by anybody
282	virtual ~attachable ();
283	};
284
285	// the global object is a pseudo object that cares for the global events
286	struct global : attachable
287	{
288	void gather_callbacks (AV *&callbacks, event_type event) const;
289	};
290
291	extern struct global gbl_ev;
292
293	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
294
295	#include "freezethaw.h"
296
297	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
298
299	struct coroapi {
300	static struct CoroAPI *GCoroAPI;
301
302	static EV_ATOMIC_T cede_pending;
303
304	static int nready () { return CORO_NREADY; }
305	static int cede () { cede_pending = 0; return CORO_CEDE ; }
306
307	static void do_cede_to_tick ();
308
309	// actually cede's far more often
310	static bool cede_to_tick ()
311	{
312	if (expect_true (!cede_pending))
313	return false;
314
315	do_cede_to_tick ();
316	return true;
317	}
318
319	static void wait_for_tick ();
320	static void wait_for_tick_begin ();
321	};
322
323	struct evapi
324	{
325	static struct EVAPI *GEVAPI;
326	};
327
328	struct iow : ev_io, evapi, callback<void (iow &, int)>
329	{
330	static void thunk (EV_P_ struct ev_io *w_, int revents)
331	{
332	iow &w = static_cast<iow >(w_);
333
334	w (w, revents);
335	}
336
337	template<class O, class M>
338	iow (O object, M method)
339	: callback<void (iow &, int)> (object, method)
340	{
341	ev_init ((ev_io *)this, thunk);
342	}
343
344	void prio (int prio)
345	{
346	ev_set_priority ((ev_io *)this, prio);
347	}
348
349	void set (int fd, int events)
350	{
351	ev_io_set ((ev_io *)this, fd, events);
352	}
353
354	int poll () const { return events; }
355
356	void poll (int events);
357
358	void start ()
359	{
360	ev_io_start (EV_DEFAULT, (ev_io *)this);
361	}
362
363	void stop ()
364	{
365	ev_io_stop (EV_DEFAULT, (ev_io *)this);
366	}
367
368	~iow ()
369	{
370	stop ();
371	}
372	};
373
374	struct asyncw : ev_async, evapi, callback<void (ev_async &, int)>
375	{
376	static void thunk (EV_P_ struct ev_async *w_, int revents)
377	{
378	asyncw &w = static_cast<asyncw >(w_);
379
380	w (w, revents);
381	}
382
383	template<class O, class M>
384	asyncw (O object, M method)
385	: callback<void (asyncw &, int)> (object, method)
386	{
387	ev_init ((ev_async *)this, thunk);
388	}
389
390	void start ()
391	{
392	ev_async_start (EV_DEFAULT, (ev_async *)this);
393	}
394
395	void stop ()
396	{
397	ev_async_stop (EV_DEFAULT, (ev_async *)this);
398	}
399
400	~asyncw ()
401	{
402	stop ();
403	}
404	};
405
406	#endif
407