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/cvs/Coro/Event/Event.xs
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Comparing Coro/Event/Event.xs (file contents):
Revision 1.5 by root, Fri Aug 17 04:08:58 2001 UTC vs.
Revision 1.18 by root, Fri Dec 29 11:37:49 2006 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <assert.h>
5#include <string.h> 6#include <string.h>
6 7
7#include "EventAPI.h" 8#include "EventAPI.h"
8#include "../Coro/CoroAPI.h" 9#include "../Coro/CoroAPI.h"
9 10
10#define CD_CORO 0 11#define CD_WAIT 0 /* wait queue */
11#define CD_TYPE 1 12#define CD_TYPE 1
12#define CD_OK 2 13#define CD_OK 2
13#define CD_GOT 3 /* hardcoded in Coro::Event, Coro::Handle */
14#define CD_MAX 3
15/* no support for hits and prio so far. */
16 14
17#define EV_CLASS "Coro::Event" 15#define CD_HITS 4 /* hardcoded in Coro::Event */
18 16#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */
19static pe_idle *scheduler; 17#define CD_MAX 5
20static int do_schedule;
21
22#define NEED_SCHEDULE if (!do_schedule) \
23 { \
24 do_schedule = 1; \
25 GEventAPI->now ((pe_watcher *)scheduler); \
26 }
27 18
28static void 19static void
29coro_std_cb(pe_event *pe) 20coro_std_cb (pe_event *pe)
30{ 21{
31 AV *priv = (AV *)SvRV ((SV *)pe->ext_data); 22 AV *priv = (AV *)pe->ext_data;
32 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 23 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
33 SV *cd_coro = *av_fetch (priv, CD_CORO, 1); 24 AV *cd_wait;
25 SV *coro;
34 26
35 if (type == 1) 27 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
36 av_store (priv, CD_GOT, newSViv (((pe_ioevent *)pe)->got)); 28 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
37 29
38 if (SvROK (cd_coro)) 30 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
31
32 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
33 if ((coro = av_shift (cd_wait)))
39 { 34 {
40 CORO_READY (cd_coro); 35 if (av_len (cd_wait) < 0)
41 av_store (priv, CD_CORO, &PL_sv_undef);
42 NEED_SCHEDULE;
43 }
44 else
45 {
46 av_store (priv, CD_OK, &PL_sv_yes);
47 GEventAPI->stop (pe->up, 0); 36 GEventAPI->stop (pe->up, 0);
37
38 CORO_READY (coro);
39 SvREFCNT_dec (coro);
48 } 40 }
49} 41}
50 42
51static void 43static void
52scheduler_cb(pe_event *pe) 44asynccheck_hook (void *data)
53{ 45{
46 /* this loops as long as we have _other_ coros with the same or higher priority */
54 while (CORO_NREADY) 47 while (CORO_NREADY && CORO_CEDE)
55 CORO_CEDE; 48 ;
49}
56 50
57 do_schedule = 0; 51static double
52prepare_hook (void *data)
53{
54 /* this yields once to another coro with any priority */
55 if (CORO_NREADY)
56 {
57 CORO_CEDE_NOTSELF;
58 /*
59 * timers might have changed, and Event fails to notice this
60 * so we have to assume the worst. If Event didn't have that bug,
61 * we would only need to do this if CORO_NREADY is != 0 now.
62 */
63 return 0.;
64 }
65 else
66 return 85197.73; /* this is as good as any value, but it factors badly with common values */
58} 67}
59 68
60MODULE = Coro::Event PACKAGE = Coro::Event 69MODULE = Coro::Event PACKAGE = Coro::Event
61 70
62PROTOTYPES: ENABLE 71PROTOTYPES: ENABLE
63 72
64BOOT: 73BOOT:
65{ 74{
66 I_EVENT_API("Coro::Event"); 75 I_EVENT_API ("Coro::Event");
67 I_CORO_API ("Coro::Event"); 76 I_CORO_API ("Coro::Event");
68 77
69 /* create a fake idle handler (we only ever call now) */ 78 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
70 scheduler = GEventAPI->new_idle (0, 0); 79 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
71 scheduler->base.callback = scheduler_cb;
72 scheduler->base.prio = 4; /* StarvePrio(?) */
73 scheduler->min_interval = newSVnv (0);
74 scheduler->max_interval = newSVnv (0);
75 GEventAPI->stop ((pe_watcher *)scheduler, 0);
76} 80}
77 81
78void 82void
79_install_std_cb(self,type) 83_install_std_cb (SV *self, int type)
80 SV * self
81 int type
82 CODE: 84 CODE:
85{
83 pe_watcher *w = GEventAPI->sv_2watcher (self); 86 pe_watcher *w = GEventAPI->sv_2watcher (self);
84 AV *priv = newAV ();
85 SV *rv = newRV_noinc ((SV *)priv);
86 87
87 av_extend (priv, CD_MAX); 88 if (w->callback)
88 av_store (priv, CD_TYPE, newSViv (type)); 89 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
89 90
90 w->callback = coro_std_cb; 91 {
91 w->ext_data = rv; 92 AV *priv = newAV ();
93 SV *rv = newRV_noinc ((SV *)priv);
92 94
93 hv_store ((HV *)SvRV (self), 95 av_fill (priv, CD_MAX);
94 EV_CLASS, strlen (EV_CLASS), 96 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* badbad */
95 rv, 0); 97 AvARRAY (priv)[CD_TYPE] = newSViv (type);
98 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
99 AvARRAY (priv)[CD_HITS] = newSViv (0);
100 AvARRAY (priv)[CD_GOT ] = newSViv (0);
101 SvREADONLY_on (priv);
102
103 w->callback = coro_std_cb;
104 w->ext_data = priv;
105
106 /* make sure Event does not use PERL_MAGIC_uvar, which */
107 /* we abuse for non-uvar purposes. */
108 sv_magicext (SvRV (self), rv, PERL_MAGIC_uvar, 0, 0, 0);
109 }
110}
96 111
97void 112void
98_next(self) 113_next (SV *self)
99 SV * self
100 CODE: 114 CODE:
115{
101 pe_watcher *w = GEventAPI->sv_2watcher (self); 116 pe_watcher *w = GEventAPI->sv_2watcher (self);
102 AV *priv = (AV *)SvRV ((SV *)w->ext_data); 117 AV *priv = (AV *)w->ext_data;
103 118
104 if (SvOK (*av_fetch (priv, CD_CORO, 1))) 119 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
105 croak ("only one coroutine can wait for an event"); 120 {
121 AvARRAY (priv)[CD_OK] = &PL_sv_no;
122 XSRETURN_NO; /* got an event */
123 }
124
125 av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
106 126
107 if (!w->running) 127 if (!w->running)
108 GEventAPI->start (w, 1); 128 GEventAPI->start (w, 1);
109 129
110 if (*av_fetch (priv, CD_OK, 1) == &PL_sv_yes) 130 XSRETURN_YES; /* schedule */
111 { 131}
112 av_store (priv, CD_OK, &PL_sv_no);
113 XSRETURN_NO;
114 }
115 else
116 {
117 av_store (priv, CD_CORO, SvREFCNT_inc (CORO_CURRENT));
118 XSRETURN_YES;
119 }
120 132
133SV *
134_event (SV *self)
135 CODE:
136{
137 if (GIMME_V == G_VOID)
138 XSRETURN_EMPTY;
139
140 {
141 pe_watcher *w = GEventAPI->sv_2watcher (self);
142 AV *priv = (AV *)w->ext_data;
143
144 RETVAL = newRV_inc ((SV *)priv);
145 }
146}
147 OUTPUT:
148 RETVAL
149

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