Coro/Event/Event.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <string.h>

/* this useful idiom is unfortunately missing... */
static void
confess (const char *msg)
{
  dSP;

  PUSHMARK(SP);
  XPUSHs (sv_2mortal(newSVpv("only one coroutine can wait for an event at any given time",0)));
  PUTBACK;
  call_pv ("Carp::confess", G_VOID);
}

#include "EventAPI.h"
#include "../Coro/CoroAPI.h"

#ifndef PE_PERLCB
# define PE_PERLCB 0x020 /* not public, but we need it :( */
#endif

#define CD_CORO 0
#define CD_TYPE 1
#define CD_OK   2
#define CD_PRIO 3 /* hardcoded in Coro::Event */
#define CD_HITS 4 /* hardcoded in Coro::Event */
#define CD_GOT  5 /* hardcoded in Coro::Event, Coro::Handle */
#define CD_MAX  5

#define EV_CLASS "Coro::Event"

static void
coro_std_cb(pe_event *pe)
{
  AV *priv = (AV *)pe->ext_data;
  IV type = SvIV (*av_fetch (priv, CD_TYPE, 1));
  SV **cd_coro = &AvARRAY(priv)[CD_CORO];

  sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
  sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits);

  if (type == 1)
    sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);

  if (*cd_coro != &PL_sv_undef)
    {
      CORO_READY (*cd_coro);
      SvREFCNT_dec (*cd_coro);
      *cd_coro = &PL_sv_undef;
    }
  else
    {
      AvARRAY(priv)[CD_OK] = &PL_sv_yes;
      GEventAPI->stop (pe->up, 0);
    }
}

static double
prepare_hook (void *data)
{
  while (CORO_NREADY)
    CORO_CEDE;

  return 1e20;
}

MODULE = Coro::Event                PACKAGE = Coro::Event

PROTOTYPES: ENABLE

BOOT:
{
        I_EVENT_API ("Coro::Event");
        I_CORO_API ("Coro::Event");

        GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
}

void
_install_std_cb(self,type)
        SV *    self
        int     type
        CODE:
        pe_watcher *w = GEventAPI->sv_2watcher (self);

        if (WaFLAGS (w) & PE_PERLCB)
          croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught");
        {
          AV *priv = newAV ();
          SV *rv = newRV_noinc ((SV *)priv);

          av_extend (priv, CD_MAX);
          av_store (priv, CD_CORO, &PL_sv_undef);
          av_store (priv, CD_TYPE, newSViv (type));
          av_store (priv, CD_OK  , &PL_sv_no);
          av_store (priv, CD_PRIO, newSViv (0));
          av_store (priv, CD_HITS, newSViv (0));
          av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef);
          SvREADONLY_on (priv);

          w->callback = coro_std_cb;
          w->ext_data = priv;

          hv_store ((HV *)SvRV (self),
                    EV_CLASS, strlen (EV_CLASS),
                    rv, 0);

          GEventAPI->start (w, 0);
        }

void
_next(self)
        SV *    self
        CODE:
        pe_watcher *w = GEventAPI->sv_2watcher (self);
        AV *priv = (AV *)w->ext_data;

        if (!w->running)
          GEventAPI->start (w, 1);

        if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
          {
            AvARRAY(priv)[CD_OK] = &PL_sv_no;
            XSRETURN_NO;
          }
        else 
          {
            if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
              confess ("only one coroutine can wait for an event");

            AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
            XSRETURN_YES;
          }

Revision:	1.10
Committed:	Thu Nov 23 23:54:02 2006 UTC (17 years, 7 months ago) by root
Branch:	MAIN
Changes since 1.9:	+4 -32 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5	root	1.3	#include <string.h>
6
7	root	1.6	/* this useful idiom is unfortunately missing... */
8			static void
9			confess (const char *msg)
10			{
11			dSP;
12
13			PUSHMARK(SP);
14	root	1.9	XPUSHs (sv_2mortal(newSVpv("only one coroutine can wait for an event at any given time",0)));
15	root	1.6	PUTBACK;
16			call_pv ("Carp::confess", G_VOID);
17			}
18
19	root	1.2	#include "EventAPI.h"
20			#include "../Coro/CoroAPI.h"
21	root	1.1
22	root	1.9	#ifndef PE_PERLCB
23			# define PE_PERLCB 0x020 /* not public, but we need it :( */
24			#endif
25
26	root	1.3	#define CD_CORO 0
27			#define CD_TYPE 1
28	root	1.4	#define CD_OK 2
29	root	1.6	#define CD_PRIO 3 /* hardcoded in Coro::Event */
30			#define CD_HITS 4 /* hardcoded in Coro::Event */
31			#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */
32			#define CD_MAX 5
33	root	1.3
34	root	1.4	#define EV_CLASS "Coro::Event"
35	root	1.3
36			static void
37			coro_std_cb(pe_event *pe)
38			{
39	root	1.6	AV priv = (AV )pe->ext_data;
40	root	1.4	IV type = SvIV (*av_fetch (priv, CD_TYPE, 1));
41	root	1.6	SV **cd_coro = &AvARRAY(priv)[CD_CORO];
42
43			sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
44			sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits);
45	root	1.3
46			if (type == 1)
47	root	1.6	sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
48	root	1.3
49	root	1.6	if (*cd_coro != &PL_sv_undef)
50	root	1.3	{
51	root	1.6	CORO_READY (*cd_coro);
52			SvREFCNT_dec (*cd_coro);
53			*cd_coro = &PL_sv_undef;
54	root	1.3	}
55	root	1.4	else
56			{
57	root	1.6	AvARRAY(priv)[CD_OK] = &PL_sv_yes;
58	root	1.4	GEventAPI->stop (pe->up, 0);
59			}
60	root	1.3	}
61
62	root	1.10	static double
63			prepare_hook (void *data)
64	root	1.3	{
65			while (CORO_NREADY)
66			CORO_CEDE;
67
68	root	1.10	return 1e20;
69	root	1.3	}
70
71	root	1.1	MODULE = Coro::Event PACKAGE = Coro::Event
72
73	root	1.3	PROTOTYPES: ENABLE
74
75	root	1.1	BOOT:
76			{
77	root	1.9	I_EVENT_API ("Coro::Event");
78	root	1.1	I_CORO_API ("Coro::Event");
79	root	1.3
80	root	1.10	GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
81	root	1.1	}
82	root	1.3
83			void
84			_install_std_cb(self,type)
85			SV * self
86			int type
87			CODE:
88			pe_watcher *w = GEventAPI->sv_2watcher (self);
89
90	root	1.9	if (WaFLAGS (w) & PE_PERLCB)
91			croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught");
92			{
93			AV *priv = newAV ();
94			SV rv = newRV_noinc ((SV )priv);
95
96			av_extend (priv, CD_MAX);
97			av_store (priv, CD_CORO, &PL_sv_undef);
98			av_store (priv, CD_TYPE, newSViv (type));
99			av_store (priv, CD_OK , &PL_sv_no);
100			av_store (priv, CD_PRIO, newSViv (0));
101			av_store (priv, CD_HITS, newSViv (0));
102			av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef);
103			SvREADONLY_on (priv);
104
105			w->callback = coro_std_cb;
106			w->ext_data = priv;
107
108			hv_store ((HV *)SvRV (self),
109			EV_CLASS, strlen (EV_CLASS),
110			rv, 0);
111	root	1.3
112	root	1.9	GEventAPI->start (w, 0);
113			}
114	root	1.8
115	root	1.3	void
116	root	1.4	_next(self)
117	root	1.3	SV * self
118			CODE:
119			pe_watcher *w = GEventAPI->sv_2watcher (self);
120	root	1.6	AV priv = (AV )w->ext_data;
121	root	1.3
122	root	1.4	if (!w->running)
123			GEventAPI->start (w, 1);
124	root	1.3
125	root	1.6	if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
126	root	1.4	{
127	root	1.6	AvARRAY(priv)[CD_OK] = &PL_sv_no;
128	root	1.4	XSRETURN_NO;
129			}
130			else
131			{
132	root	1.6	if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
133			confess ("only one coroutine can wait for an event");
134
135			AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
136	root	1.4	XSRETURN_YES;
137			}
138	root	1.6