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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 1.21 by root, Sat Sep 22 21:10:15 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 19
32static pe_idle *scheduler; 20#define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */
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 21
41static void 22static void
42coro_std_cb(pe_event *pe) 23coro_std_cb (pe_event *pe)
43{ 24{
44 AV *priv = (AV *)pe->ext_data; 25 AV *priv = (AV *)pe->ext_data;
45 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 26 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
46 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 27 AV *cd_wait;
28 SV *coro;
47 29
48 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
49 sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); 30 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
31 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
50 32
51 if (type == 1) 33 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
52 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
53 34
35 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
36
37 coro = av_shift (cd_wait);
54 if (*cd_coro != &PL_sv_undef) 38 if (coro != &PL_sv_undef)
55 { 39 {
56 CORO_READY (*cd_coro); 40 CORO_READY (coro);
57 SvREFCNT_dec (*cd_coro); 41 SvREFCNT_dec (coro);
58 *cd_coro = &PL_sv_undef;
59 NEED_SCHEDULE;
60 } 42 }
61 else 43
62 { 44 if (av_len (cd_wait) < 0)
63 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
64 GEventAPI->stop (pe->up, 0); 45 GEventAPI->stop (pe->up, 0);
65 }
66} 46}
67 47
68static void 48static void
69scheduler_cb(pe_event *pe) 49asynccheck_hook (void *data)
70{ 50{
51 /* this loops as long as we have _other_ coros with the same or higher priority */
71 while (CORO_NREADY) 52 while (CORO_NREADY && CORO_CEDE)
72 CORO_CEDE; 53 ;
54}
73 55
74 do_schedule = 0; 56static double
57prepare_hook (void *data)
58{
59 /* this yields once to another coro with any priority */
60 if (CORO_NREADY)
61 {
62 CORO_CEDE_NOTSELF;
63 /*
64 * timers might have changed, and Event fails to notice this
65 * so we have to assume the worst. If Event didn't have that bug,
66 * we would only need to do this if CORO_NREADY is != 0 now.
67 */
68 return 0.;
69 }
70 else
71 return 85197.73; /* this is as good as any value, but it factors badly with common values */
75} 72}
76 73
77MODULE = Coro::Event PACKAGE = Coro::Event 74MODULE = Coro::Event PACKAGE = Coro::Event
78 75
79PROTOTYPES: ENABLE 76PROTOTYPES: ENABLE
80 77
81BOOT: 78BOOT:
82{ 79{
80 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
81
83 I_EVENT_API("Coro::Event"); 82 I_EVENT_API ("Coro::Event");
84 I_CORO_API ("Coro::Event"); 83 I_CORO_API ("Coro::Event");
85 84
86 /* create a fake idle handler (we only ever call now) */ 85 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
87 scheduler = GEventAPI->new_idle (0, 0); 86 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} 87}
94 88
95void 89void
96_install_std_cb(self,type) 90_install_std_cb (SV *self, int type)
97 SV * self
98 int type
99 CODE: 91 CODE:
92{
100 pe_watcher *w = GEventAPI->sv_2watcher (self); 93 pe_watcher *w = GEventAPI->sv_2watcher (self);
101 AV *priv = newAV ();
102 SV *rv = newRV_noinc ((SV *)priv);
103 94
104 av_extend (priv, CD_MAX); 95 if (w->callback)
105 av_store (priv, CD_CORO, &PL_sv_undef); 96 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 97
113 w->callback = coro_std_cb; 98 {
114 w->ext_data = priv; 99 AV *priv = newAV ();
115 100
116 hv_store ((HV *)SvRV (self), 101 av_fill (priv, CD_MAX);
117 EV_CLASS, strlen (EV_CLASS), 102 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
118 rv, 0); 103 AvARRAY (priv)[CD_TYPE] = newSViv (type);
104 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
105 AvARRAY (priv)[CD_HITS] = newSViv (0);
106 AvARRAY (priv)[CD_GOT ] = newSViv (0);
107 SvREADONLY_on (priv);
119 108
120 GEventAPI->start (w, 0); 109 w->callback = coro_std_cb;
110 w->ext_data = priv;
111
112 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_coro_event, 0, w, 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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