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 pe_idle *scheduler;
static int do_schedule;

#define NEED_SCHEDULE if (!do_schedule)                                 \
                        {                                               \
                          do_schedule = 1;                              \
                          GEventAPI->now ((pe_watcher *)scheduler);     \
                        }

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;
      NEED_SCHEDULE;
    }
  else
    {
      AvARRAY(priv)[CD_OK] = &PL_sv_yes;
      GEventAPI->stop (pe->up, 0);
    }
}

static void
scheduler_cb(pe_event *pe)
{
  while (CORO_NREADY)
    CORO_CEDE;

  do_schedule = 0;
}

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

PROTOTYPES: ENABLE

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

        /* create a fake idle handler (we only ever call now) */
        scheduler = GEventAPI->new_idle (0, 0);
        scheduler->base.callback = scheduler_cb;
        scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */
        scheduler->min_interval = newSVnv (0);
        scheduler->max_interval = newSVnv (0);
        GEventAPI->stop ((pe_watcher *)scheduler, 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;
          }

MODULE = Coro::Event                PACKAGE = Coro

# overwrite the ready function
void
ready(self)
        SV *    self
        PROTOTYPE: $
        CODE:
        NEED_SCHEDULE;
        CORO_READY (self);


Revision:	1.9
Committed:	Sat Mar 22 18:50:32 2003 UTC (21 years, 3 months ago) by root
Branch:	MAIN
CVS Tags:	rel-2_5, rel-2_0, rel-2_1, rel-1_1, rel-1_0, rel-1_9, rel-1_2, rel-1_5, rel-1_4, rel-1_7, rel-1_6, rel-1_31
Changes since 1.8:	+29 -20 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 pe_idle *scheduler;
37			static int do_schedule;
38
39			#define NEED_SCHEDULE if (!do_schedule) \
40			{ \
41			do_schedule = 1; \
42			GEventAPI->now ((pe_watcher *)scheduler); \
43			}
44	root	1.4
45	root	1.3	static void
46			coro_std_cb(pe_event *pe)
47			{
48	root	1.6	AV priv = (AV )pe->ext_data;
49	root	1.4	IV type = SvIV (*av_fetch (priv, CD_TYPE, 1));
50	root	1.6	SV **cd_coro = &AvARRAY(priv)[CD_CORO];
51
52			sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
53			sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits);
54	root	1.3
55			if (type == 1)
56	root	1.6	sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
57	root	1.3
58	root	1.6	if (*cd_coro != &PL_sv_undef)
59	root	1.3	{
60	root	1.6	CORO_READY (*cd_coro);
61			SvREFCNT_dec (*cd_coro);
62			*cd_coro = &PL_sv_undef;
63	root	1.3	NEED_SCHEDULE;
64			}
65	root	1.4	else
66			{
67	root	1.6	AvARRAY(priv)[CD_OK] = &PL_sv_yes;
68	root	1.4	GEventAPI->stop (pe->up, 0);
69			}
70	root	1.3	}
71
72			static void
73			scheduler_cb(pe_event *pe)
74			{
75			while (CORO_NREADY)
76			CORO_CEDE;
77
78			do_schedule = 0;
79			}
80
81	root	1.1	MODULE = Coro::Event PACKAGE = Coro::Event
82
83	root	1.3	PROTOTYPES: ENABLE
84
85	root	1.1	BOOT:
86			{
87	root	1.9	I_EVENT_API ("Coro::Event");
88	root	1.1	I_CORO_API ("Coro::Event");
89	root	1.3
90			/* create a fake idle handler (we only ever call now) */
91			scheduler = GEventAPI->new_idle (0, 0);
92			scheduler->base.callback = scheduler_cb;
93	root	1.6	scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */
94	root	1.3	scheduler->min_interval = newSVnv (0);
95			scheduler->max_interval = newSVnv (0);
96			GEventAPI->stop ((pe_watcher *)scheduler, 0);
97	root	1.1	}
98	root	1.3
99			void
100			_install_std_cb(self,type)
101			SV * self
102			int type
103			CODE:
104			pe_watcher *w = GEventAPI->sv_2watcher (self);
105
106	root	1.9	if (WaFLAGS (w) & PE_PERLCB)
107			croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught");
108			{
109			AV *priv = newAV ();
110			SV rv = newRV_noinc ((SV )priv);
111
112			av_extend (priv, CD_MAX);
113			av_store (priv, CD_CORO, &PL_sv_undef);
114			av_store (priv, CD_TYPE, newSViv (type));
115			av_store (priv, CD_OK , &PL_sv_no);
116			av_store (priv, CD_PRIO, newSViv (0));
117			av_store (priv, CD_HITS, newSViv (0));
118			av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef);
119			SvREADONLY_on (priv);
120
121			w->callback = coro_std_cb;
122			w->ext_data = priv;
123
124			hv_store ((HV *)SvRV (self),
125			EV_CLASS, strlen (EV_CLASS),
126			rv, 0);
127	root	1.3
128	root	1.9	GEventAPI->start (w, 0);
129			}
130	root	1.8
131	root	1.3	void
132	root	1.4	_next(self)
133	root	1.3	SV * self
134			CODE:
135			pe_watcher *w = GEventAPI->sv_2watcher (self);
136	root	1.6	AV priv = (AV )w->ext_data;
137	root	1.3
138	root	1.4	if (!w->running)
139			GEventAPI->start (w, 1);
140	root	1.3
141	root	1.6	if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
142	root	1.4	{
143	root	1.6	AvARRAY(priv)[CD_OK] = &PL_sv_no;
144	root	1.4	XSRETURN_NO;
145			}
146			else
147			{
148	root	1.6	if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
149			confess ("only one coroutine can wait for an event");
150
151			AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
152	root	1.4	XSRETURN_YES;
153			}
154	root	1.6
155			MODULE = Coro::Event PACKAGE = Coro
156
157			# overwrite the ready function
158			void
159			ready(self)
160			SV * self
161	root	1.7	PROTOTYPE: $
162	root	1.6	CODE:
163			NEED_SCHEDULE;
164			CORO_READY (self);
165
166	root	1.3