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/cvs/Coro/Event/Event.xs
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Comparing Coro/Event/Event.xs (file contents):
Revision 1.8 by root, Sun Apr 14 01:18:38 2002 UTC vs.
Revision 1.19 by root, Wed Jan 24 16:22:08 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/* this useful idiom is unfortunately missing... */
8static void
9confess (const char *msg)
10{
11 dSP;
12
13 PUSHMARK(SP);
14 XPUSHs (sv_2mortal(newSVpv("only one coroutine can wait for an event",0)));
15 PUTBACK;
16 call_pv ("Carp::confess", G_VOID);
17}
18 7
19#include "EventAPI.h" 8#include "EventAPI.h"
20#include "../Coro/CoroAPI.h" 9#include "../Coro/CoroAPI.h"
21 10
22#define CD_CORO 0 11#define CD_WAIT 0 /* wait queue */
23#define CD_TYPE 1 12#define CD_TYPE 1
24#define CD_OK 2 13#define CD_OK 2
25#define CD_PRIO 3 /* hardcoded in Coro::Event */
26#define CD_HITS 4 /* hardcoded in Coro::Event */ 14#define CD_HITS 3 /* hardcoded in Coro::Event */
27#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */ 15#define CD_GOT 4 /* hardcoded in Coro::Event, Coro::Handle */
28#define CD_MAX 5 16#define CD_MAX 4
29 17
30#define EV_CLASS "Coro::Event" 18static HV *coro_event_event_stash;
31
32static pe_idle *scheduler;
33static int do_schedule;
34
35#define NEED_SCHEDULE if (!do_schedule) \
36 { \
37 do_schedule = 1; \
38 GEventAPI->now ((pe_watcher *)scheduler); \
39 }
40 19
41static void 20static void
42coro_std_cb(pe_event *pe) 21coro_std_cb (pe_event *pe)
43{ 22{
44 AV *priv = (AV *)pe->ext_data; 23 AV *priv = (AV *)pe->ext_data;
45 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 24 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
46 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 25 AV *cd_wait;
26 SV *coro;
47 27
48 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
49 sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); 28 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
29 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
50 30
51 if (type == 1) 31 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
52 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
53 32
33 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
34
35 coro = av_shift (cd_wait);
54 if (*cd_coro != &PL_sv_undef) 36 if (coro != &PL_sv_undef)
55 { 37 {
56 CORO_READY (*cd_coro); 38 CORO_READY (coro);
57 SvREFCNT_dec (*cd_coro); 39 SvREFCNT_dec (coro);
58 *cd_coro = &PL_sv_undef;
59 NEED_SCHEDULE;
60 } 40 }
61 else 41
62 { 42 if (av_len (cd_wait) < 0)
63 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
64 GEventAPI->stop (pe->up, 0); 43 GEventAPI->stop (pe->up, 0);
65 }
66} 44}
67 45
68static void 46static void
69scheduler_cb(pe_event *pe) 47asynccheck_hook (void *data)
70{ 48{
49 /* this loops as long as we have _other_ coros with the same or higher priority */
71 while (CORO_NREADY) 50 while (CORO_NREADY && CORO_CEDE)
72 CORO_CEDE; 51 ;
52}
73 53
74 do_schedule = 0; 54static double
55prepare_hook (void *data)
56{
57 /* this yields once to another coro with any priority */
58 if (CORO_NREADY)
59 {
60 CORO_CEDE_NOTSELF;
61 /*
62 * timers might have changed, and Event fails to notice this
63 * so we have to assume the worst. If Event didn't have that bug,
64 * we would only need to do this if CORO_NREADY is != 0 now.
65 */
66 return 0.;
67 }
68 else
69 return 85197.73; /* this is as good as any value, but it factors badly with common values */
75} 70}
76 71
77MODULE = Coro::Event PACKAGE = Coro::Event 72MODULE = Coro::Event PACKAGE = Coro::Event
78 73
79PROTOTYPES: ENABLE 74PROTOTYPES: ENABLE
80 75
81BOOT: 76BOOT:
82{ 77{
78 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
79
83 I_EVENT_API("Coro::Event"); 80 I_EVENT_API ("Coro::Event");
84 I_CORO_API ("Coro::Event"); 81 I_CORO_API ("Coro::Event");
85 82
86 /* create a fake idle handler (we only ever call now) */ 83 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
87 scheduler = GEventAPI->new_idle (0, 0); 84 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
88 scheduler->base.callback = scheduler_cb;
89 scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */
90 scheduler->min_interval = newSVnv (0);
91 scheduler->max_interval = newSVnv (0);
92 GEventAPI->stop ((pe_watcher *)scheduler, 0);
93} 85}
94 86
95void 87void
96_install_std_cb(self,type) 88_install_std_cb (SV *self, int type)
97 SV * self
98 int type
99 CODE: 89 CODE:
90{
100 pe_watcher *w = GEventAPI->sv_2watcher (self); 91 pe_watcher *w = GEventAPI->sv_2watcher (self);
101 AV *priv = newAV ();
102 SV *rv = newRV_noinc ((SV *)priv);
103 92
104 av_extend (priv, CD_MAX); 93 if (w->callback)
105 av_store (priv, CD_CORO, &PL_sv_undef); 94 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
106 av_store (priv, CD_TYPE, newSViv (type));
107 av_store (priv, CD_OK , &PL_sv_no);
108 av_store (priv, CD_PRIO, newSViv (0));
109 av_store (priv, CD_HITS, newSViv (0));
110 av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef);
111 SvREADONLY_on (priv);
112 95
113 w->callback = coro_std_cb; 96 {
114 w->ext_data = priv; 97 AV *priv = newAV ();
115 98
116 hv_store ((HV *)SvRV (self), 99 av_fill (priv, CD_MAX);
117 EV_CLASS, strlen (EV_CLASS), 100 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
118 rv, 0); 101 AvARRAY (priv)[CD_TYPE] = newSViv (type);
102 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
103 AvARRAY (priv)[CD_HITS] = newSViv (0);
104 AvARRAY (priv)[CD_GOT ] = newSViv (0);
105 SvREADONLY_on (priv);
119 106
120 GEventAPI->start (w, 0); 107 w->callback = coro_std_cb;
108 w->ext_data = priv;
109
110 /* make sure Event does not use PERL_MAGIC_uvar, which */
111 /* we abuse for non-uvar purposes. */
112 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_uvar, 0, 0, 0);
113 }
114}
121 115
122void 116void
123_next(self) 117_next (SV *self)
124 SV * self
125 CODE: 118 CODE:
119{
126 pe_watcher *w = GEventAPI->sv_2watcher (self); 120 pe_watcher *w = GEventAPI->sv_2watcher (self);
127 AV *priv = (AV *)w->ext_data; 121 AV *priv = (AV *)w->ext_data;
122
123 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
124 {
125 AvARRAY (priv)[CD_OK] = &PL_sv_no;
126 XSRETURN_NO; /* got an event */
127 }
128
129 av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
128 130
129 if (!w->running) 131 if (!w->running)
130 GEventAPI->start (w, 1); 132 GEventAPI->start (w, 1);
131 133
132 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes) 134 XSRETURN_YES; /* schedule */
133 { 135}
134 AvARRAY(priv)[CD_OK] = &PL_sv_no;
135 XSRETURN_NO;
136 }
137 else
138 {
139 if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
140 confess ("only one coroutine can wait for an event");
141 136
142 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); 137SV *
138_event (SV *self)
139 CODE:
140{
141 if (GIMME_V == G_VOID)
143 XSRETURN_YES; 142 XSRETURN_EMPTY;
144 }
145 143
146MODULE = Coro::Event PACKAGE = Coro 144 {
145 pe_watcher *w = GEventAPI->sv_2watcher (self);
146 AV *priv = (AV *)w->ext_data;
147 147
148# overwrite the ready function 148 RETVAL = newRV_inc ((SV *)priv);
149void
150ready(self)
151 SV * self
152 PROTOTYPE: $
153 CODE:
154 NEED_SCHEDULE;
155 CORO_READY (self);
156 149
150 /* may need to bless it now */
151 if (!SvOBJECT (priv))
152 {
153 SvREADONLY_off ((SV *)priv);
154 sv_bless (RETVAL, coro_event_event_stash);
155 SvREADONLY_on ((SV *)priv);
156 }
157 }
158}
159 OUTPUT:
160 RETVAL
157 161

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