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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 1.16 by root, Sat Dec 2 18:01:30 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/* 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 */ 14
26#define CD_HITS 4 /* hardcoded in Coro::Event */ 15#define CD_HITS 4 /* hardcoded in Coro::Event */
27#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */ 16#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */
28#define CD_MAX 5 17#define CD_MAX 5
29 18
30#define EV_CLASS "Coro::Event"
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
41static void 19static void
42coro_std_cb(pe_event *pe) 20coro_std_cb (pe_event *pe)
43{ 21{
44 AV *priv = (AV *)pe->ext_data; 22 AV *priv = (AV *)pe->ext_data;
45 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 23 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
46 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 24 AV *cd_wait;
25 SV *coro;
47 26
48 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
49 sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); 27 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
28 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
50 29
51 if (type == 1) 30 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
52 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
53 31
54 if (*cd_coro != &PL_sv_undef) 32 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
33 if ((coro = av_shift (cd_wait)))
55 { 34 {
56 CORO_READY (*cd_coro); 35 if (av_len (cd_wait) < 0)
57 SvREFCNT_dec (*cd_coro);
58 *cd_coro = &PL_sv_undef;
59 NEED_SCHEDULE;
60 }
61 else
62 {
63 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
64 GEventAPI->stop (pe->up, 0); 36 GEventAPI->stop (pe->up, 0);
37
38 CORO_READY (coro);
39 SvREFCNT_dec (coro);
65 } 40 }
66} 41}
67 42
68static void 43static void
69scheduler_cb(pe_event *pe) 44asynccheck_hook (void *data)
70{ 45{
46 /* ceding from C means allocating a stack, but we assume this is a rare case */
71 while (CORO_NREADY) 47 while (CORO_NREADY)
72 CORO_CEDE; 48 CORO_CEDE;
73
74 do_schedule = 0;
75} 49}
76 50
77MODULE = Coro::Event PACKAGE = Coro::Event 51MODULE = Coro::Event PACKAGE = Coro::Event
78 52
79PROTOTYPES: ENABLE 53PROTOTYPES: ENABLE
80 54
81BOOT: 55BOOT:
82{ 56{
83 I_EVENT_API("Coro::Event"); 57 I_EVENT_API ("Coro::Event");
84 I_CORO_API ("Coro::Event"); 58 I_CORO_API ("Coro::Event");
85 59
86 /* create a fake idle handler (we only ever call now) */ 60 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
87 scheduler = GEventAPI->new_idle (0, 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} 61}
94 62
95void 63void
96_install_std_cb(self,type) 64_install_std_cb (SV *self, int type)
97 SV * self
98 int type
99 CODE: 65 CODE:
66{
100 pe_watcher *w = GEventAPI->sv_2watcher (self); 67 pe_watcher *w = GEventAPI->sv_2watcher (self);
101 AV *priv = newAV ();
102 SV *rv = newRV_noinc ((SV *)priv);
103 68
104 av_extend (priv, CD_MAX); 69 if (w->callback)
105 av_store (priv, CD_CORO, &PL_sv_undef); 70 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 71
113 w->callback = coro_std_cb; 72 {
114 w->ext_data = priv; 73 AV *priv = newAV ();
74 SV *rv = newRV_noinc ((SV *)priv);
115 75
116 hv_store ((HV *)SvRV (self), 76 av_fill (priv, CD_MAX);
117 EV_CLASS, strlen (EV_CLASS), 77 AvARRAY (priv)[CD_WAIT] = newAV (); /* badbad */
118 rv, 0); 78 AvARRAY (priv)[CD_TYPE] = newSViv (type);
79 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
80 AvARRAY (priv)[CD_HITS] = newSViv (0);
81 AvARRAY (priv)[CD_GOT ] = newSViv (0);
82 SvREADONLY_on (priv);
119 83
120 GEventAPI->start (w, 0); 84 w->callback = coro_std_cb;
85 w->ext_data = priv;
86
87 /* make sure Event does not use PERL_MAGIC_uvar, which */
88 /* we abuse for non-uvar purposes. */
89 sv_magicext (SvRV (self), rv, PERL_MAGIC_uvar, 0, 0, 0);
90 }
91}
121 92
122void 93void
123_next(self) 94_next (SV *self)
124 SV * self
125 CODE: 95 CODE:
96{
126 pe_watcher *w = GEventAPI->sv_2watcher (self); 97 pe_watcher *w = GEventAPI->sv_2watcher (self);
127 AV *priv = (AV *)w->ext_data; 98 AV *priv = (AV *)w->ext_data;
99
100 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
101 {
102 AvARRAY (priv)[CD_OK] = &PL_sv_no;
103 XSRETURN_NO; /* got an event */
104 }
105
106 av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
128 107
129 if (!w->running) 108 if (!w->running)
130 GEventAPI->start (w, 1); 109 GEventAPI->start (w, 1);
131 110
132 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes) 111 XSRETURN_YES; /* schedule */
133 { 112}
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");
141 113
142 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); 114SV *
115_event (SV *self)
116 CODE:
117{
118 if (GIMME_V == G_VOID)
143 XSRETURN_YES; 119 XSRETURN_EMPTY;
144 }
145 120
146MODULE = Coro::Event PACKAGE = Coro 121 {
122 pe_watcher *w = GEventAPI->sv_2watcher (self);
123 AV *priv = (AV *)w->ext_data;
147 124
148# overwrite the ready function 125 RETVAL = newRV_inc ((SV *)priv);
149void 126 }
150ready(self) 127}
151 SV * self 128 OUTPUT:
152 PROTOTYPE: $ 129 RETVAL
153 CODE:
154 NEED_SCHEDULE;
155 CORO_READY (self);
156 130
157

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