server/include/cfperl.h

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

#include <cstdarg>
#include <cstdio>
#include <bitset>

using namespace std;

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

#include <EventAPI.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 readdir
#undef getprotobyname
#undef gethostbyname
#undef ctime
#undef strerror

// 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

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

// some macros to simplify perl in-calls

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

#define CALL_BEGIN(args) dSP; 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_pv (name, (flags) | G_EVAL); SPAGAIN;
#define CALL_END CHECK_ERROR; FREETMPS; LEAVE

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

void cfperl_init ();
void cfperl_main ();
void cfperl_emergency_save ();
void cfperl_cleanup (int make_core);
void cfperl_make_book (object *book, int level);

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

// virtual server time, excluding time jumps and lag
extern double runtime;

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
{
  static MGVTBL vtbl;

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

  enum {
    F_DESTROYED   = 0x01,
    F_DEBUG_TRACE = 0x02,
  };

  // object is delete'd after the refcount reaches 0
  int ACC (RW, flags);
  mutable int ACC (RW, refcnt);

  MTH void refcnt_inc () const { ++refcnt; }
  MTH void refcnt_dec () const { --refcnt; }

  MTH int refcnt_cnt () const;
  // check wether the object has died and destroy
  MTH void refcnt_chk () { if (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 flags & F_DESTROYED; }

  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 ()
  : flags (0), refcnt (0), self (0), cb (0), attach (0)
  {
  }

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

  virtual ~attachable ();

  attachable &operator =(const attachable &src);

  // used to _quickly_ device 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 ();
};

// 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;

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

struct object_freezer : dynbuf_text
{
  AV *av;

  object_freezer ();
  ~object_freezer ();

  void put (attachable *ext);

  // used only for user-defined key-value pairs
  void put (const shstr &k, const shstr &v)
  {
    add (k);

    if (expect_true (v))
      add (' '), add (v);

    add ('\n');
  }

  //TODO//temporary, used only for saving body locations
  void put (const char *k, int v)
  {
    add (k);
    add (' ');
    add (sint32 (v));
    add ('\n');
  }

  template<typename T>
  void put_string (keyword k, const T &v)
  {
    int klen = keyword_len [k];
    int vlen = v ? strlen (v) + 1 : 0;

    char *p = (char *)alloc (klen + vlen + 1);

    memcpy (p, keyword_str [k], klen); p += klen;

    if (expect_true (v))
      {
        *p++ = ' ';  vlen--;
        memcpy (p, v, vlen); p += vlen;
      }

    *p = '\n';
  }

  void put (keyword k, const char *v = 0)
  {
    put_string (k, v);
  }

  void put (keyword k, const shstr &v)
  {
    put_string (k, v);
  }

  void put (keyword k, double v)
  {
    char buf [128];

    snprintf (buf, 128, "%.7g", v);

    put (k, (const char *)buf);
  }

  void put_(keyword k, sint64 v)
  {
    add (keyword_str [k], keyword_len [k]);
    add (' ');
    add (v);
    add ('\n');
  }

  void put_(keyword k, sint32 v)
  {
    add (keyword_str [k], keyword_len [k]);
    add (' ');
    add (v);
    add ('\n');
  }

  void put (keyword kbeg, keyword kend, const shstr &v)
  {
    add (keyword_str [kbeg], keyword_len [kbeg]); add ('\n');

    if (expect_true (v))
      {
        add (v);
        add ('\n');
      }

    add (keyword_str [kend], keyword_len [kend]); add ('\n');
  }

  void put (keyword k,          float     v) { put (k, (double)v); }
  void put (keyword k,   signed char      v) { put_(k, (sint32)v); }
  void put (keyword k, unsigned char      v) { put_(k, (sint32)v); }
  void put (keyword k,   signed short     v) { put_(k, (sint32)v); }
  void put (keyword k, unsigned short     v) { put_(k, (sint32)v); }
  void put (keyword k,   signed int       v) { put_(k, (sint32)v); }
  void put (keyword k, unsigned int       v) { put_(k, (sint64)v); }
  void put (keyword k,   signed long      v) { put_(k, (sint64)v); }
  void put (keyword k, unsigned long      v) { put_(k, (sint64)v); }
  void put (keyword k,   signed long long v) { put_(k, (sint64)v); }
  void put (keyword k, unsigned long long v) { put_(k, (sint64)v); }

  template<typename T>
  void put (keyword k, const T *v)
  {
    if (expect_true (v))
      put (k, v->name);
    else
      put (k, (const char *)0);
  }

  template<typename T>
  void put (keyword k, const refptr<T> &v)
  {
    put (k, (T *)v);
  }

  bool save (const char *path);
  char *as_string (); // like strdup

  operator bool () { return !!av; }
};

// compatibility support, should be removed when no longer needed
void fprintf (object_freezer &freezer, const char *format, ...);
void fputs (const char *s, object_freezer &freezer);

struct object_thawer
{
  char *line; // current beginning of line
  SV *text; // text part
  AV *av;   // perl part
  int linenum;
  keyword kw;
  char *kw_str; // the keyword parsed, as string
  char *value;  // the value, or 0 if no value
  char *value_nn; // the value, or the empty string if no value
  const char *name;

  operator bool () { return !!text; }

  object_thawer (const char *path = 0);
  object_thawer (const char *data, AV *perlav);
  ~object_thawer ();

  void get (attachable *obj, int oid);

  // parse next line
  void next ();
  // skip the current key-value (usually fetch next line, for
  // multiline-fields, skips untilt he corresponding end-kw
  void skip ();

  //TODO: remove, deprecated
  keyword get_kv ()
  {
    next ();
    return kw;
  }

  char *get_str () { return value; } // may be 0
  void get_ml (keyword kend, shstr &sh);

  void get_ornull (shstr &sh) const { sh = value; }
  void get (shstr &sh)        const { sh = value; } // might want to check for non-null here

  bool   get_bool   () const { return *value_nn == '1'; }
  sint32 get_sint32 () const;
  sint64 get_sint64 () const { return atoll (value_nn); }
  double get_double () const { return atof  (value_nn); }

  void get (float  &v) { v = get_double (); }
  void get (double &v) { v = get_double (); }

  void get (bool   &i) { i = get_bool   (); }
  void get (sint8  &i) { i = get_sint32 (); }
  void get (uint8  &i) { i = get_sint32 (); }
  void get (sint16 &i) { i = get_sint32 (); }
  void get (uint16 &i) { i = get_sint32 (); }
  void get (sint32 &i) { i = get_sint32 (); }

  void get (uint32 &i) { i = get_sint64 (); }
  void get (sint64 &i) { i = get_sint64 (); }

  bool parse_error (const char *type = 0, const char *name = 0, bool skip = true);
};

//TODO: remove
char *fgets (char *s, int n, object_thawer &thawer);

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

struct coroapi {
  static struct CoroAPI *GCoroAPI;

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

  static double (*time)();
  static double next_cede;
  static int cede_counter;

  static void do_cede_every ();
  static void do_cede_to_tick ();
  static void do_cede_to_tick_every ();

  static void cede_every (int count)
  {
    if (expect_false (++cede_counter >= count))
      do_cede_every ();
  }

  static void cede_to_tick ()
  {
    if (expect_false (time () >= next_cede))
      do_cede_to_tick ();
  }

  static void cede_to_tick_every (int count)
  {
    if (expect_false (++cede_counter >= count))
      cede_to_tick ();
  }

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

struct watcher_base
{
  static struct EventAPI *GEventAPI;
};

template<class base>
struct watcher : watcher_base
{
  base *pe;

  void start   (bool repeat = false)        { GEventAPI->start   ((pe_watcher *)pe, repeat); }
  void stop    (bool cancel_events = false) { GEventAPI->stop    ((pe_watcher *)pe, cancel_events); }
  void now     ()                           { GEventAPI->now     ((pe_watcher *)pe); }
  void suspend ()                           { GEventAPI->suspend ((pe_watcher *)pe); }
  void resume  ()                           { GEventAPI->resume  ((pe_watcher *)pe); }

  void prio    (int new_prio)               { ((pe_watcher *)pe)->prio = new_prio; }

  ~watcher ()
  {
    cancel ();
  }

private:
  void cancel  ()                           { GEventAPI->cancel  ((pe_watcher *)pe); } // private
};

struct iw : watcher<pe_idle>, callback<void (iw &)>
{
  template<class O, class M>
  iw (O object, M method)
  : callback<void (iw &)> (object, method)
  {
    alloc ();
  }

private:
  void alloc ();
};

struct iow : watcher<pe_io>, callback<void (iow &, int)>
{
  template<class O, class M>
  iow (O object, M method)
  : callback<void (iow &, int)> (object, method)
  {
    alloc ();
  }

  void fd (int fd);
  int poll ();
  void poll (int events);

private:
  void alloc ();
};

#endif

Revision:	1.66
Committed:	Sat May 26 15:44:03 2007 UTC (17 years ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_1
Changes since 1.65:	+29 -31 lines
Log Message:	- restore after combined mainboard+harddisk crash - cleanup/fixes for 2.1 release - fix invoke to actually do work - refactor invoke shortcuts, gcc cannot inline varargs functions. - optimised invoke to 4-5 insns in the common case. - optimised (For no good reason) the int-to-ascii conversions of dynbuf_text into division-less and branchless code (of which I am pretty proud). - actually move players to their savebed when they did not use one and the map has been reste in the meantime. does not kill (yet) when too long. - enter_map is now handled completely in perl. - goto is now using generation counting to ensure that only the most-recently-issues goto will succeed. - make some heavy use of __builtin_expect to streamline rare callbacks even more. - optimised thawer.
#	Content
1	//
2	// cfperl.h perl interface
3	//
4	#ifndef CFPERL_H__
5	#define CFPERL_H__
6
7	#include <cstdarg>
8	#include <cstdio>
9	#include <bitset>
10
11	using namespace std;
12
13	#include <EXTERN.h>
14	#include <perl.h>
15	#include <XSUB.h>
16
17	#include <EventAPI.h>
18	#include <CoroAPI.h>
19
20	#include "util.h"
21	#include "keyword.h"
22	#include "dynbuf.h"
23	#include "callback.h"
24
25	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
26
27	// optimisations/workaround for functions requiring my_perl in scope (anti-bloat)
28	#undef localtime
29	#undef srand48
30	#undef drand48
31	#undef srandom
32	#undef readdir
33	#undef getprotobyname
34	#undef gethostbyname
35	#undef ctime
36	#undef strerror
37
38	// same here, massive symbol spamming
39	#undef do_open
40	#undef do_close
41	#undef ref
42	#undef seed
43
44	// perl bug #40256: perl does overwrite those with reentrant versions
45	// but does not initialise their state structures.
46	#undef random
47	#undef crypt
48
49	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
50
51	// some macros to simplify perl in-calls
52
53	#define CHECK_ERROR \
54	if (SvTRUE (ERRSV)) \
55	LOG (llevError, "runtime error in %s: %s\n", __func__, SvPVutf8_nolen (ERRSV));
56
57	#define CALL_BEGIN(args) dSP; ENTER; SAVETMPS; PUSHMARK (SP); EXTEND (SP, args)
58	#define CALL_ARG_SV(sv) PUSHs (sv_2mortal (sv)) // separate because no refcount inc
59	#define CALL_ARG(expr) PUSHs (sv_2mortal (to_sv (expr)))
60	#define CALL_CALL(name, flags) PUTBACK; int count = call_pv (name, (flags) \| G_EVAL); SPAGAIN;
61	#define CALL_END CHECK_ERROR; FREETMPS; LEAVE
62
63	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
64
65	void cfperl_init ();
66	void cfperl_main ();
67	void cfperl_emergency_save ();
68	void cfperl_cleanup (int make_core);
69	void cfperl_make_book (object *book, int level);
70
71	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
72
73	// virtual server time, excluding time jumps and lag
74	extern double runtime;
75
76	enum event_klass
77	{
78	KLASS_NONE,
79	KLASS_GLOBAL,
80	KLASS_ATTACHABLE,
81	KLASS_CLIENT,
82	KLASS_PLAYER,
83	KLASS_OBJECT,
84	KLASS_MAP,
85	KLASS_COMMAND,
86	};
87
88	enum event_type
89	{
90	# define def(klass,name) EVENT_ ## klass ## _ ## name,
91	# include "eventinc.h"
92	# undef def
93	NUM_EVENT_TYPES
94	};
95
96	// in which global events or per-type events are we interested
97	extern bitset<NUM_EVENT_TYPES> ev_want_event;
98	extern bitset<NUM_TYPES> ev_want_type;
99
100	#define ARG_AV(o) DT_AV , static_cast<AV *> (o)
101	#define ARG_INT(v) DT_INT , static_cast<int> (v)
102	#define ARG_INT64(v) DT_INT64 , static_cast<sint64> (v)
103	#define ARG_DOUBLE(v) DT_DOUBLE, static_cast<double> (v)
104	#define ARG_STRING(v) DT_STRING, static_cast<const char *> (v)
105	#define ARG_DATA(s,l) DT_DATA , static_cast<const void *> (s), int (l)
106	#define ARG_OBJECT(o) DT_OBJECT, (void )(static_cast<object > (o))
107	#define ARG_MAP(o) DT_MAP , (void )(static_cast<maptile > (o))
108	#define ARG_PLAYER(o) DT_PLAYER, (void )(static_cast<player > (o))
109	#define ARG_ARCH(o) DT_ARCH , (void )(static_cast<archetype > (o))
110	#define ARG_CLIENT(o) DT_CLIENT, (void )(static_cast<client > (o))
111	#define ARG_PARTY(o) DT_PARTY , (void )(static_cast<party > (o))
112	#define ARG_REGION(o) DT_REGION, (void )(static_cast<region > (o))
113
114	// the ", ## __VA_ARGS" is, unfortunately, a gnu-cpp extension
115	#define INVOKE(obj,event, ...) (expect_false ((obj)->should_invoke (event)) ? (obj)->invoke (event, ## __VA_ARGS__, DT_END) : 0)
116	#define INVOKE_GLOBAL(event, ...) INVOKE (&gbl_ev, EVENT_ ## GLOBAL ## _ ## event, ## __VA_ARGS__)
117	#define INVOKE_ATTACHABLE(event, obj, ...) INVOKE (obj , EVENT_ ## ATTACHABLE ## _ ## event, ## __VA_ARGS__)
118	#define INVOKE_OBJECT(event, obj, ...) INVOKE (obj , EVENT_ ## OBJECT ## _ ## event, ## __VA_ARGS__)
119	#define INVOKE_CLIENT(event, obj, ...) INVOKE (obj , EVENT_ ## CLIENT ## _ ## event, ## __VA_ARGS__)
120	#define INVOKE_PLAYER(event, obj, ...) INVOKE (obj , EVENT_ ## PLAYER ## _ ## event, ## __VA_ARGS__)
121	#define INVOKE_MAP(event, obj, ...) INVOKE (obj , EVENT_ ## MAP ## _ ## event, ## __VA_ARGS__)
122
123	//TODO should index into @result
124	#define RESULT(idx,type) cfperl_result_ ## type (idx)
125	#define RESULT_DOUBLE(idx) RESULT(idx, DOUBLE)
126	#define RESULT_INT(idx) RESULT(idx, INT)
127
128	double cfperl_result_DOUBLE (int idx);
129	int cfperl_result_INT (int idx);
130
131	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
132
133	INTERFACE_CLASS (attachable)
134	struct attachable
135	{
136	static MGVTBL vtbl;
137
138	static unordered_vector<attachable *> mortals;
139	MTH static void check_mortals ();
140
141	enum {
142	F_DESTROYED = 0x01,
143	F_DEBUG_TRACE = 0x02,
144	};
145
146	// object is delete'd after the refcount reaches 0
147	int ACC (RW, flags);
148	mutable int ACC (RW, refcnt);
149
150	MTH void refcnt_inc () const { ++refcnt; }
151	MTH void refcnt_dec () const { --refcnt; }
152
153	MTH int refcnt_cnt () const;
154	// check wether the object has died and destroy
155	MTH void refcnt_chk () { if (refcnt <= 0) do_check (); }
156
157	// destroy the object unless it was already destroyed
158	// this politely asks everybody interested the reduce
159	// the refcount to 0 as soon as possible.
160	MTH void destroy ();
161
162	// return wether an object was destroyed already
163	MTH bool destroyed () const { return flags & F_DESTROYED; }
164
165	virtual void gather_callbacks (AV *&callbacks, event_type event) const;
166
167	#if 0
168	private:
169	static refcounted *rc_first;
170	refcounted *rc_next;
171	#endif
172
173	HV *self; // CF+ perl self
174	AV *cb; // CF+ callbacks
175	shstr attach; // generic extension attachment information
176
177	void sever_self (); // sever this object from its self, if it has one.
178	void optimise (); // possibly save some memory by destroying unneeded data
179
180	attachable ()
181	: flags (0), refcnt (0), self (0), cb (0), attach (0)
182	{
183	}
184
185	attachable (const attachable &src)
186	: flags (0), refcnt (0), self (0), cb (0), attach (src.attach)
187	{
188	}
189
190	virtual ~attachable ();
191
192	attachable &operator =(const attachable &src);
193
194	// used to _quickly_ device wether to shortcut the evaluation
195	bool should_invoke (event_type event)
196	{
197	return ev_want_event [event] \|\| cb;
198	}
199
200	bool invoke (event_type event, ...);
201
202	MTH void instantiate ();
203	void reattach ();
204
205	protected:
206	// do the real refcount checking work
207	void do_check ();
208
209	// the method that does the real destroy work
210	virtual void do_destroy ();
211	};
212
213	// the global object is a pseudo object that cares for the global events
214	struct global : attachable
215	{
216	void gather_callbacks (AV *&callbacks, event_type event) const;
217	};
218
219	extern struct global gbl_ev;
220
221	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
222
223	struct object_freezer : dynbuf_text
224	{
225	AV *av;
226
227	object_freezer ();
228	~object_freezer ();
229
230	void put (attachable *ext);
231
232	// used only for user-defined key-value pairs
233	void put (const shstr &k, const shstr &v)
234	{
235	add (k);
236
237	if (expect_true (v))
238	add (' '), add (v);
239
240	add ('\n');
241	}
242
243	//TODO//temporary, used only for saving body locations
244	void put (const char *k, int v)
245	{
246	add (k);
247	add (' ');
248	add (sint32 (v));
249	add ('\n');
250	}
251
252	template<typename T>
253	void put_string (keyword k, const T &v)
254	{
255	int klen = keyword_len [k];
256	int vlen = v ? strlen (v) + 1 : 0;
257
258	char p = (char )alloc (klen + vlen + 1);
259
260	memcpy (p, keyword_str [k], klen); p += klen;
261
262	if (expect_true (v))
263	{
264	*p++ = ' '; vlen--;
265	memcpy (p, v, vlen); p += vlen;
266	}
267
268	*p = '\n';
269	}
270
271	void put (keyword k, const char *v = 0)
272	{
273	put_string (k, v);
274	}
275
276	void put (keyword k, const shstr &v)
277	{
278	put_string (k, v);
279	}
280
281	void put (keyword k, double v)
282	{
283	char buf [128];
284
285	snprintf (buf, 128, "%.7g", v);
286
287	put (k, (const char *)buf);
288	}
289
290	void put_(keyword k, sint64 v)
291	{
292	add (keyword_str [k], keyword_len [k]);
293	add (' ');
294	add (v);
295	add ('\n');
296	}
297
298	void put_(keyword k, sint32 v)
299	{
300	add (keyword_str [k], keyword_len [k]);
301	add (' ');
302	add (v);
303	add ('\n');
304	}
305
306	void put (keyword kbeg, keyword kend, const shstr &v)
307	{
308	add (keyword_str [kbeg], keyword_len [kbeg]); add ('\n');
309
310	if (expect_true (v))
311	{
312	add (v);
313	add ('\n');
314	}
315
316	add (keyword_str [kend], keyword_len [kend]); add ('\n');
317	}
318
319	void put (keyword k, float v) { put (k, (double)v); }
320	void put (keyword k, signed char v) { put_(k, (sint32)v); }
321	void put (keyword k, unsigned char v) { put_(k, (sint32)v); }
322	void put (keyword k, signed short v) { put_(k, (sint32)v); }
323	void put (keyword k, unsigned short v) { put_(k, (sint32)v); }
324	void put (keyword k, signed int v) { put_(k, (sint32)v); }
325	void put (keyword k, unsigned int v) { put_(k, (sint64)v); }
326	void put (keyword k, signed long v) { put_(k, (sint64)v); }
327	void put (keyword k, unsigned long v) { put_(k, (sint64)v); }
328	void put (keyword k, signed long long v) { put_(k, (sint64)v); }
329	void put (keyword k, unsigned long long v) { put_(k, (sint64)v); }
330
331	template<typename T>
332	void put (keyword k, const T *v)
333	{
334	if (expect_true (v))
335	put (k, v->name);
336	else
337	put (k, (const char *)0);
338	}
339
340	template<typename T>
341	void put (keyword k, const refptr<T> &v)
342	{
343	put (k, (T *)v);
344	}
345
346	bool save (const char *path);
347	char *as_string (); // like strdup
348
349	operator bool () { return !!av; }
350	};
351
352	// compatibility support, should be removed when no longer needed
353	void fprintf (object_freezer &freezer, const char *format, ...);
354	void fputs (const char *s, object_freezer &freezer);
355
356	struct object_thawer
357	{
358	char *line; // current beginning of line
359	SV *text; // text part
360	AV *av; // perl part
361	int linenum;
362	keyword kw;
363	char *kw_str; // the keyword parsed, as string
364	char *value; // the value, or 0 if no value
365	char *value_nn; // the value, or the empty string if no value
366	const char *name;
367
368	operator bool () { return !!text; }
369
370	object_thawer (const char *path = 0);
371	object_thawer (const char data, AV perlav);
372	~object_thawer ();
373
374	void get (attachable *obj, int oid);
375
376	// parse next line
377	void next ();
378	// skip the current key-value (usually fetch next line, for
379	// multiline-fields, skips untilt he corresponding end-kw
380	void skip ();
381
382	//TODO: remove, deprecated
383	keyword get_kv ()
384	{
385	next ();
386	return kw;
387	}
388
389	char *get_str () { return value; } // may be 0
390	void get_ml (keyword kend, shstr &sh);
391
392	void get_ornull (shstr &sh) const { sh = value; }
393	void get (shstr &sh) const { sh = value; } // might want to check for non-null here
394
395	bool get_bool () const { return *value_nn == '1'; }
396	sint32 get_sint32 () const;
397	sint64 get_sint64 () const { return atoll (value_nn); }
398	double get_double () const { return atof (value_nn); }
399
400	void get (float &v) { v = get_double (); }
401	void get (double &v) { v = get_double (); }
402
403	void get (bool &i) { i = get_bool (); }
404	void get (sint8 &i) { i = get_sint32 (); }
405	void get (uint8 &i) { i = get_sint32 (); }
406	void get (sint16 &i) { i = get_sint32 (); }
407	void get (uint16 &i) { i = get_sint32 (); }
408	void get (sint32 &i) { i = get_sint32 (); }
409
410	void get (uint32 &i) { i = get_sint64 (); }
411	void get (sint64 &i) { i = get_sint64 (); }
412
413	bool parse_error (const char type = 0, const char name = 0, bool skip = true);
414	};
415
416	//TODO: remove
417	char fgets (char s, int n, object_thawer &thawer);
418
419	//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
420
421	struct coroapi {
422	static struct CoroAPI *GCoroAPI;
423
424	static int nready () { return CORO_NREADY; }
425	static int cede () { return CORO_CEDE ; }
426
427	static double (*time)();
428	static double next_cede;
429	static int cede_counter;
430
431	static void do_cede_every ();
432	static void do_cede_to_tick ();
433	static void do_cede_to_tick_every ();
434
435	static void cede_every (int count)
436	{
437	if (expect_false (++cede_counter >= count))
438	do_cede_every ();
439	}
440
441	static void cede_to_tick ()
442	{
443	if (expect_false (time () >= next_cede))
444	do_cede_to_tick ();
445	}
446
447	static void cede_to_tick_every (int count)
448	{
449	if (expect_false (++cede_counter >= count))
450	cede_to_tick ();
451	}
452
453	static void wait_for_tick ();
454	static void wait_for_tick_begin ();
455	};
456
457	struct watcher_base
458	{
459	static struct EventAPI *GEventAPI;
460	};
461
462	template<class base>
463	struct watcher : watcher_base
464	{
465	base *pe;
466
467	void start (bool repeat = false) { GEventAPI->start ((pe_watcher *)pe, repeat); }
468	void stop (bool cancel_events = false) { GEventAPI->stop ((pe_watcher *)pe, cancel_events); }
469	void now () { GEventAPI->now ((pe_watcher *)pe); }
470	void suspend () { GEventAPI->suspend ((pe_watcher *)pe); }
471	void resume () { GEventAPI->resume ((pe_watcher *)pe); }
472
473	void prio (int new_prio) { ((pe_watcher *)pe)->prio = new_prio; }
474
475	~watcher ()
476	{
477	cancel ();
478	}
479
480	private:
481	void cancel () { GEventAPI->cancel ((pe_watcher *)pe); } // private
482	};
483
484	struct iw : watcher<pe_idle>, callback<void (iw &)>
485	{
486	template<class O, class M>
487	iw (O object, M method)
488	: callback<void (iw &)> (object, method)
489	{
490	alloc ();
491	}
492
493	private:
494	void alloc ();
495	};
496
497	struct iow : watcher<pe_io>, callback<void (iow &, int)>
498	{
499	template<class O, class M>
500	iow (O object, M method)
501	: callback<void (iow &, int)> (object, method)
502	{
503	alloc ();
504	}
505
506	void fd (int fd);
507	int poll ();
508	void poll (int events);
509
510	private:
511	void alloc ();
512	};
513
514	#endif
515