server/include/cfperl.h

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 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);
void cfperl_ix (client *ns, int set, faceidx idx, int pri);

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

ecb_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, ...) (ecb_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 (ecb_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*/int 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 (ecb_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:	1.133
Committed:	Wed Dec 5 19:13:21 2018 UTC (5 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.132:	+1 -1 lines
Log Message:	undefined behaviour, but now very ugly... https://groups.google.com/forum/#!topic/comp.std.c/3xa6qqiVXbc
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
5	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6	*
7	* Deliantra is free software: you can redistribute it and/or modify it under
8	* the terms of the Affero GNU General Public License as published by the
9	* Free Software Foundation, either version 3 of the License, or (at your
10	* option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the Affero GNU General Public License
18	* and the GNU General Public License along with this program. If not, see
19	* <http://www.gnu.org/licenses/>.
20	*
21	* The authors can be reached via e-mail to <support@deliantra.net>
22	*/
23
24	//
25	// cfperl.h perl interface
26	//
27	#ifndef CFPERL_H__
28	#define CFPERL_H__
29
30	using namespace std;
31
32	#include <EXTERN.h>
33	#include <perl.h>
34	#include <XSUB.h>
35
36	#include <EVAPI.h>
37	#include <CoroAPI.h>
38
39	#include "util.h"
40	#include "keyword.h"
41	#include "dynbuf.h"
42	#include "callback.h"
43
44	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
45
46	// optimisations/workaround for functions requiring my_perl in scope (anti-bloat)
47	#undef localtime
48	#undef srand48
49	#undef drand48
50	#undef srandom
51	#undef opendir
52	#undef readdir
53	#undef closedir
54	#undef getprotobyname
55	#undef gethostbyname
56	#undef ctime
57	#undef strerror
58	#undef _
59
60	// same here, massive symbol spamming
61	#undef do_open
62	#undef do_close
63	#undef ref
64	#undef seed
65
66	// perl bug #40256: perl does overwrite those with reentrant versions
67	// but does not initialise their state structures.
68	#undef random
69	#undef crypt
70
71	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
72
73	#define _(msg) (msg)
74	#define N_(msg) (msg)
75
76	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
77
78	// some macros to simplify perl in-calls
79
80	#define CHECK_ERROR \
81	if (SvTRUE (ERRSV)) \
82	LOG (llevError, "runtime error in %s: %s", __func__, SvPVutf8_nolen (ERRSV));
83
84	inline int call_pvsv (const char *ob, I32 flags) { return call_pv (ob, flags); }
85	inline int call_pvsv (SV *ob, I32 flags) { return call_sv (ob, flags); }
86
87	// TODO: temporarily enabled pushstack/popstack for all calls from the core, to maybe fix object memleak?
88	#define CALL_PUSH PUSHSTACKi (PERLSI_UNKNOWN)
89	#define CALL_POP PUTBACK; POPSTACK; SPAGAIN
90	#define CALL_BEGIN(args) dSP; CALL_PUSH; ENTER; SAVETMPS; PUSHMARK (SP); EXTEND (SP, args)
91	#define CALL_ARG_SV(sv) PUSHs (sv_2mortal (sv)) // separate because no refcount inc
92	#define CALL_ARG(expr) PUSHs (sv_2mortal (to_sv (expr)))
93	#define CALL_CALL(name, flags) PUTBACK; int count = call_pvsv (name, (flags) \| G_EVAL); SPAGAIN;
94	#define CALL_END PUTBACK; CHECK_ERROR; FREETMPS; LEAVE; CALL_POP
95
96	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
97
98	void cfperl_init ();
99	void cfperl_main ();
100	void cfperl_tick ();
101	void cfperl_emergency_save ();
102	void cfperl_cleanup (int make_core);
103	void cfperl_make_book (object *book, int level);
104	void cfperl_send_msg (client *ns, int color, const_utf8_string type, const_utf8_string msg);
105	int cfperl_can_merge (object ob1, object ob2);
106	void cfperl_mapscript_activate (object ob, int state, object activator, object *originator = 0);
107	void cfperl_ix (client *ns, int set, faceidx idx, int pri);
108
109	bool is_match_expr (const_utf8_string expr);
110	// applies the match expression and returns true if it matches
111	bool match (const_utf8_string expr, object ob, object self = 0, object source = 0, object originator = 0);
112	// same as above, but returns the first object found, or 0
113	object match_one (const_utf8_string expr, object ob, object self = 0, object source = 0, object *originator = 0);
114
115	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
116
117	#if IVSIZE >= 8
118	typedef IV val64;
119	typedef IV uval64;
120	# define newSVval64 newSViv
121	# define SvVAL64 SvIV
122	# define newSVuval64 newSVuv
123	# define SvUVAL64 SvUV
124	#else
125	typedef double val64;
126	typedef double uval64;
127	# define newSVval64 newSVnv
128	# define SvVAL64 SvNV
129	# define newSVuval64 newSVnv
130	# define SvUVAL64 SvNV
131	#endif
132
133	extern tstamp runtime; // virtual server time, excluding time jumps and lag
134	extern tstamp NOW; // real time of current server tick
135
136	ecb_noinline utf8_string cfSvPVutf8_nolen (SV *sv);
137
138	enum event_klass
139	{
140	KLASS_NONE,
141	KLASS_GLOBAL,
142	KLASS_ATTACHABLE,
143	KLASS_CLIENT,
144	KLASS_PLAYER,
145	KLASS_OBJECT,
146	KLASS_MAP,
147	KLASS_COMMAND,
148	};
149
150	enum event_type
151	{
152	# define def(klass,name) EVENT_ ## klass ## _ ## name,
153	# include "eventinc.h"
154	# undef def
155	NUM_EVENT_TYPES
156	};
157
158	// in which global events or per-type events are we interested
159	extern bitset<NUM_EVENT_TYPES> ev_want_event;
160	extern bitset<NUM_TYPES> ev_want_type;
161
162	#define ARG_AV(o) DT_AV , static_cast<AV *> (o)
163	#define ARG_INT(v) DT_INT , static_cast<int> (v)
164	#define ARG_INT64(v) DT_INT64 , static_cast<sint64> (v)
165	#define ARG_DOUBLE(v) DT_DOUBLE, static_cast<double> (v)
166	#define ARG_STRING(v) DT_STRING, static_cast<const char *> (v)
167	#define ARG_DATA(s,l) DT_DATA , static_cast<const void *> (s), int (l)
168	#define ARG_OBJECT(o) DT_OBJECT, (void )(static_cast<object > (o))
169	#define ARG_MAP(o) DT_MAP , (void )(static_cast<maptile > (o))
170	#define ARG_PLAYER(o) DT_PLAYER, (void )(static_cast<player > (o))
171	#define ARG_ARCH(o) DT_ARCH , (void )(static_cast<archetype > (o))
172	#define ARG_CLIENT(o) DT_CLIENT, (void )(static_cast<client > (o))
173	#define ARG_PARTY(o) DT_PARTY , (void )(static_cast<party > (o))
174	#define ARG_REGION(o) DT_REGION, (void )(static_cast<region > (o))
175
176	// the ", ## __VA_ARGS" is, unfortunately, a gnu-cpp extension
177	#define INVOKE(obj,event, ...) (ecb_expect_false ((obj)->should_invoke (event)) ? (obj)->invoke (event, ## __VA_ARGS__, DT_END) : 0)
178	#define INVOKE_GLOBAL(event, ...) INVOKE (&gbl_ev, EVENT_ ## GLOBAL ## _ ## event, ## __VA_ARGS__)
179	#define INVOKE_ATTACHABLE(event, obj, ...) INVOKE (obj , EVENT_ ## ATTACHABLE ## _ ## event, ## __VA_ARGS__)
180	#define INVOKE_OBJECT(event, obj, ...) INVOKE (obj , EVENT_ ## OBJECT ## _ ## event, ## __VA_ARGS__)
181	#define INVOKE_CLIENT(event, obj, ...) INVOKE (obj , EVENT_ ## CLIENT ## _ ## event, ## __VA_ARGS__)
182	#define INVOKE_PLAYER(event, obj, ...) INVOKE (obj , EVENT_ ## PLAYER ## _ ## event, ## __VA_ARGS__)
183	#define INVOKE_MAP(event, obj, ...) INVOKE (obj , EVENT_ ## MAP ## _ ## event, ## __VA_ARGS__)
184
185	//TODO should index into @result
186	#define RESULT(idx,type) cfperl_result_ ## type (idx)
187	#define RESULT_DOUBLE(idx) RESULT(idx, DOUBLE)
188	#define RESULT_INT(idx) RESULT(idx, INT)
189
190	double cfperl_result_DOUBLE (int idx);
191	int cfperl_result_INT (int idx);
192
193	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
194
195	INTERFACE_CLASS (attachable)
196	struct attachable : refcnt_base
197	{
198	static MGVTBL vtbl;
199
200	enum {
201	F_DESTROYED = 0x01,
202	F_DEBUG_TRACE = 0x02,
203	};
204	uint8 ACC (RW, attachable_flags);
205
206	static unordered_vector<attachable *> mortals;
207	MTH static void check_mortals ();
208
209	// object is delete'd after the refcount reaches 0
210	MTH int refcnt_cnt () const;
211	// check wether the object has died and destroy
212	MTH void refcnt_chk () { if (ecb_expect_false (refcnt <= 0)) do_check (); }
213
214	// destroy the object unless it was already destroyed
215	// this politely asks everybody interested the reduce
216	// the refcount to 0 as soon as possible.
217	MTH void destroy ();
218
219	// return wether an object was destroyed already
220	MTH bool destroyed () const { return attachable_flags & F_DESTROYED; }
221
222	// destruct and free the memory for this object
223	virtual void do_delete ();
224
225	virtual void gather_callbacks (AV *&callbacks, event_type event) const;
226
227	#if 0
228	private:
229	static refcounted *rc_first;
230	refcounted *rc_next;
231	#endif
232
233	HV *self; // CF+ perl self
234	AV *cb; // CF+ callbacks
235	shstr attach; // generic extension attachment information
236
237	void sever_self (); // sever this object from its self, if it has one.
238	void optimise (); // possibly save some memory by destroying unneeded data
239
240	attachable ()
241	: attachable_flags (0), self (0), cb (0), attach (0)
242	{
243	}
244
245	attachable (const attachable &src)
246	: attachable_flags (0), self (0), cb (0), attach (src.attach)
247	{
248	}
249
250	// set a custom key to the given value, or delete it if value = 0
251	void set_key (const_utf8_string key, const_utf8_string value = 0, bool is_utf8 = 0);
252
253	void set_key_text (const_utf8_string key, const_utf8_string value = 0)
254	{
255	set_key (key, value, 1);
256	}
257
258	void set_key_data (const_utf8_string key, const_utf8_string value = 0)
259	{
260	set_key (key, value, 0);
261	}
262
263	attachable &operator =(const attachable &src);
264
265	// used to _quickly_ decide wether to shortcut the evaluation
266	bool should_invoke (event_type event)
267	{
268	return ev_want_event [event] \|\| cb;
269	}
270
271	bool invoke (/event_type/int event, ...);
272
273	MTH void instantiate ();
274	void reattach ();
275
276	protected:
277	// do the real refcount checking work
278	void do_check ();
279
280	// the method that does the real destroy work
281	virtual void do_destroy ();
282
283	// destructor is protected, should not be called by anybody
284	virtual ~attachable ();
285	};
286
287	// the global object is a pseudo object that cares for the global events
288	struct global : attachable
289	{
290	void gather_callbacks (AV *&callbacks, event_type event) const;
291	};
292
293	extern struct global gbl_ev;
294
295	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
296
297	#include "freezethaw.h"
298
299	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
300
301	struct coroapi {
302	static struct CoroAPI *GCoroAPI;
303
304	static EV_ATOMIC_T cede_pending;
305
306	static int nready () { return CORO_NREADY; }
307	static int cede () { cede_pending = 0; return CORO_CEDE ; }
308
309	static void do_cede_to_tick ();
310
311	// actually cede's far more often
312	static bool cede_to_tick ()
313	{
314	if (ecb_expect_true (!cede_pending))
315	return false;
316
317	do_cede_to_tick ();
318	return true;
319	}
320
321	static void wait_for_tick ();
322	static void wait_for_tick_begin ();
323	};
324
325	struct evapi
326	{
327	static struct EVAPI *GEVAPI;
328	};
329
330	struct iow : ev_io, evapi, callback<void (iow &, int)>
331	{
332	static void thunk (EV_P_ struct ev_io *w_, int revents)
333	{
334	iow &w = static_cast<iow >(w_);
335
336	w (w, revents);
337	}
338
339	template<class O, class M>
340	iow (O object, M method)
341	: callback<void (iow &, int)> (object, method)
342	{
343	ev_init ((ev_io *)this, thunk);
344	}
345
346	void prio (int prio)
347	{
348	ev_set_priority ((ev_io *)this, prio);
349	}
350
351	void set (int fd, int events)
352	{
353	ev_io_set ((ev_io *)this, fd, events);
354	}
355
356	int poll () const { return events; }
357
358	void poll (int events);
359
360	void start ()
361	{
362	ev_io_start (EV_DEFAULT, (ev_io *)this);
363	}
364
365	void stop ()
366	{
367	ev_io_stop (EV_DEFAULT, (ev_io *)this);
368	}
369
370	~iow ()
371	{
372	stop ();
373	}
374	};
375
376	struct asyncw : ev_async, evapi, callback<void (ev_async &, int)>
377	{
378	static void thunk (EV_P_ struct ev_async *w_, int revents)
379	{
380	asyncw &w = static_cast<asyncw >(w_);
381
382	w (w, revents);
383	}
384
385	template<class O, class M>
386	asyncw (O object, M method)
387	: callback<void (asyncw &, int)> (object, method)
388	{
389	ev_init ((ev_async *)this, thunk);
390	}
391
392	void start ()
393	{
394	ev_async_start (EV_DEFAULT, (ev_async *)this);
395	}
396
397	void stop ()
398	{
399	ev_async_stop (EV_DEFAULT, (ev_async *)this);
400	}
401
402	~asyncw ()
403	{
404	stop ();
405	}
406	};
407
408	#endif
409