ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Event/Event.xs
(Generate patch)

Comparing Coro/Event/Event.xs (file contents):
Revision 1.5 by root, Fri Aug 17 04:08:58 2001 UTC vs.
Revision 1.20 by root, Sat Sep 22 20:11:53 2007 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
14#define CD_HITS 3 /* hardcoded in Coro::Event */
13#define CD_GOT 3 /* hardcoded in Coro::Event, Coro::Handle */ 15#define CD_GOT 4 /* hardcoded in Coro::Event, Coro::Handle */
14#define CD_MAX 3 16#define CD_MAX 4
15/* no support for hits and prio so far. */
16 17
17#define EV_CLASS "Coro::Event" 18static HV *coro_event_event_stash;
18 19
19static pe_idle *scheduler; 20static int
20static int do_schedule; 21coro_ev_free (pTHX_ SV *sv, MAGIC *mg)
22{
23 *(void **)mg->mg_ptr = 0;
21 24
22#define NEED_SCHEDULE if (!do_schedule) \ 25 return 0;
23 { \ 26}
24 do_schedule = 1; \ 27
25 GEventAPI->now ((pe_watcher *)scheduler); \ 28#define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */
26 } 29
30static MGVTBL vtbl_coro_event = {0, 0, 0, 0, coro_ev_free};
27 31
28static void 32static void
29coro_std_cb(pe_event *pe) 33coro_std_cb (pe_event *pe)
30{ 34{
35 if (pe->up->ext_data)
36 {
31 AV *priv = (AV *)SvRV ((SV *)pe->ext_data); 37 AV *priv = (AV *)pe->ext_data;
32 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 38 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
33 SV *cd_coro = *av_fetch (priv, CD_CORO, 1); 39 AV *cd_wait;
40 SV *coro;
34 41
35 if (type == 1) 42 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
36 av_store (priv, CD_GOT, newSViv (((pe_ioevent *)pe)->got)); 43 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
37 44
38 if (SvROK (cd_coro)) 45 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
39 { 46
47 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
48
49 coro = av_shift (cd_wait);
50 if (coro != &PL_sv_undef)
51 {
40 CORO_READY (cd_coro); 52 CORO_READY (coro);
41 av_store (priv, CD_CORO, &PL_sv_undef); 53 SvREFCNT_dec (coro);
42 NEED_SCHEDULE; 54 }
43 } 55
44 else 56 if (av_len (cd_wait) < 0)
45 {
46 av_store (priv, CD_OK, &PL_sv_yes);
47 GEventAPI->stop (pe->up, 0); 57 GEventAPI->stop (pe->up, 0);
48 } 58 }
49} 59}
50 60
51static void 61static void
52scheduler_cb(pe_event *pe) 62asynccheck_hook (void *data)
53{ 63{
64 /* this loops as long as we have _other_ coros with the same or higher priority */
54 while (CORO_NREADY) 65 while (CORO_NREADY && CORO_CEDE)
55 CORO_CEDE; 66 ;
67}
56 68
57 do_schedule = 0; 69static double
70prepare_hook (void *data)
71{
72 /* this yields once to another coro with any priority */
73 if (CORO_NREADY)
74 {
75 CORO_CEDE_NOTSELF;
76 /*
77 * timers might have changed, and Event fails to notice this
78 * so we have to assume the worst. If Event didn't have that bug,
79 * we would only need to do this if CORO_NREADY is != 0 now.
80 */
81 return 0.;
82 }
83 else
84 return 85197.73; /* this is as good as any value, but it factors badly with common values */
58} 85}
59 86
60MODULE = Coro::Event PACKAGE = Coro::Event 87MODULE = Coro::Event PACKAGE = Coro::Event
61 88
62PROTOTYPES: ENABLE 89PROTOTYPES: ENABLE
63 90
64BOOT: 91BOOT:
65{ 92{
93 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
94
66 I_EVENT_API("Coro::Event"); 95 I_EVENT_API ("Coro::Event");
67 I_CORO_API ("Coro::Event"); 96 I_CORO_API ("Coro::Event");
68 97
69 /* create a fake idle handler (we only ever call now) */ 98 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
70 scheduler = GEventAPI->new_idle (0, 0); 99 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} 100}
77 101
78void 102void
79_install_std_cb(self,type) 103_install_std_cb (SV *self, int type)
80 SV * self
81 int type
82 CODE: 104 CODE:
105{
83 pe_watcher *w = GEventAPI->sv_2watcher (self); 106 pe_watcher *w = GEventAPI->sv_2watcher (self);
84 AV *priv = newAV ();
85 SV *rv = newRV_noinc ((SV *)priv);
86 107
87 av_extend (priv, CD_MAX); 108 if (w->callback)
88 av_store (priv, CD_TYPE, newSViv (type)); 109 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
89 110
90 w->callback = coro_std_cb; 111 {
91 w->ext_data = rv; 112 AV *priv = newAV ();
92 113
93 hv_store ((HV *)SvRV (self), 114 av_fill (priv, CD_MAX);
94 EV_CLASS, strlen (EV_CLASS), 115 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
95 rv, 0); 116 AvARRAY (priv)[CD_TYPE] = newSViv (type);
117 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
118 AvARRAY (priv)[CD_HITS] = newSViv (0);
119 AvARRAY (priv)[CD_GOT ] = newSViv (0);
120 SvREADONLY_on (priv);
121
122 w->callback = coro_std_cb;
123 w->ext_data = priv;
124
125 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_coro_event, &vtbl_coro_event, &w->ext_data, 0);
126 }
127}
96 128
97void 129void
98_next(self) 130_next (SV *self)
99 SV * self
100 CODE: 131 CODE:
132{
101 pe_watcher *w = GEventAPI->sv_2watcher (self); 133 pe_watcher *w = GEventAPI->sv_2watcher (self);
102 AV *priv = (AV *)SvRV ((SV *)w->ext_data); 134 AV *priv = (AV *)w->ext_data;
103 135
104 if (SvOK (*av_fetch (priv, CD_CORO, 1))) 136 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
105 croak ("only one coroutine can wait for an event"); 137 {
138 AvARRAY (priv)[CD_OK] = &PL_sv_no;
139 XSRETURN_NO; /* got an event */
140 }
141
142 av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
106 143
107 if (!w->running) 144 if (!w->running)
108 GEventAPI->start (w, 1); 145 GEventAPI->start (w, 1);
109 146
110 if (*av_fetch (priv, CD_OK, 1) == &PL_sv_yes) 147 XSRETURN_YES; /* schedule */
111 { 148}
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 }
120 149
150SV *
151_event (SV *self)
152 CODE:
153{
154 if (GIMME_V == G_VOID)
155 XSRETURN_EMPTY;
156
157 {
158 pe_watcher *w = GEventAPI->sv_2watcher (self);
159 AV *priv = (AV *)w->ext_data;
160
161 RETVAL = newRV_inc ((SV *)priv);
162
163 /* may need to bless it now */
164 if (!SvOBJECT (priv))
165 {
166 SvREADONLY_off ((SV *)priv);
167 sv_bless (RETVAL, coro_event_event_stash);
168 SvREADONLY_on ((SV *)priv);
169 }
170 }
171}
172 OUTPUT:
173 RETVAL
174

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines