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/cvs/Coro/Event/Event.xs
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Comparing Coro/Event/Event.xs (file contents):
Revision 1.9 by root, Sat Mar 22 18:50:32 2003 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 at any given time",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#ifndef PE_PERLCB 11#define CD_WAIT 0 /* wait queue */
23# define PE_PERLCB 0x020 /* not public, but we need it :( */
24#endif
25
26#define CD_CORO 0
27#define CD_TYPE 1 12#define CD_TYPE 1
28#define CD_OK 2 13#define CD_OK 2
29#define CD_PRIO 3 /* hardcoded in Coro::Event */
30#define CD_HITS 4 /* hardcoded in Coro::Event */ 14#define CD_HITS 3 /* hardcoded in Coro::Event */
31#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */ 15#define CD_GOT 4 /* hardcoded in Coro::Event, Coro::Handle */
32#define CD_MAX 5 16#define CD_MAX 4
33 17
34#define EV_CLASS "Coro::Event" 18static HV *coro_event_event_stash;
35
36static pe_idle *scheduler;
37static int do_schedule;
38
39#define NEED_SCHEDULE if (!do_schedule) \
40 { \
41 do_schedule = 1; \
42 GEventAPI->now ((pe_watcher *)scheduler); \
43 }
44 19
45static void 20static void
46coro_std_cb(pe_event *pe) 21coro_std_cb (pe_event *pe)
47{ 22{
48 AV *priv = (AV *)pe->ext_data; 23 AV *priv = (AV *)pe->ext_data;
49 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 24 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
50 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 25 AV *cd_wait;
26 SV *coro;
51 27
52 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
53 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);
54 30
55 if (type == 1) 31 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
56 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
57 32
33 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
34
35 coro = av_shift (cd_wait);
58 if (*cd_coro != &PL_sv_undef) 36 if (coro != &PL_sv_undef)
59 { 37 {
60 CORO_READY (*cd_coro); 38 CORO_READY (coro);
61 SvREFCNT_dec (*cd_coro); 39 SvREFCNT_dec (coro);
62 *cd_coro = &PL_sv_undef;
63 NEED_SCHEDULE;
64 } 40 }
65 else 41
66 { 42 if (av_len (cd_wait) < 0)
67 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
68 GEventAPI->stop (pe->up, 0); 43 GEventAPI->stop (pe->up, 0);
69 }
70} 44}
71 45
72static void 46static void
73scheduler_cb(pe_event *pe) 47asynccheck_hook (void *data)
74{ 48{
49 /* this loops as long as we have _other_ coros with the same or higher priority */
75 while (CORO_NREADY) 50 while (CORO_NREADY && CORO_CEDE)
76 CORO_CEDE; 51 ;
52}
77 53
78 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 */
79} 70}
80 71
81MODULE = Coro::Event PACKAGE = Coro::Event 72MODULE = Coro::Event PACKAGE = Coro::Event
82 73
83PROTOTYPES: ENABLE 74PROTOTYPES: ENABLE
84 75
85BOOT: 76BOOT:
86{ 77{
78 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
79
87 I_EVENT_API ("Coro::Event"); 80 I_EVENT_API ("Coro::Event");
88 I_CORO_API ("Coro::Event"); 81 I_CORO_API ("Coro::Event");
89 82
90 /* create a fake idle handler (we only ever call now) */ 83 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
91 scheduler = GEventAPI->new_idle (0, 0); 84 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
92 scheduler->base.callback = scheduler_cb;
93 scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */
94 scheduler->min_interval = newSVnv (0);
95 scheduler->max_interval = newSVnv (0);
96 GEventAPI->stop ((pe_watcher *)scheduler, 0);
97} 85}
98 86
99void 87void
100_install_std_cb(self,type) 88_install_std_cb (SV *self, int type)
101 SV * self
102 int type
103 CODE: 89 CODE:
90{
104 pe_watcher *w = GEventAPI->sv_2watcher (self); 91 pe_watcher *w = GEventAPI->sv_2watcher (self);
105 92
106 if (WaFLAGS (w) & PE_PERLCB) 93 if (w->callback)
107 croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught"); 94 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
95
108 { 96 {
109 AV *priv = newAV (); 97 AV *priv = newAV ();
110 SV *rv = newRV_noinc ((SV *)priv);
111 98
112 av_extend (priv, CD_MAX); 99 av_fill (priv, CD_MAX);
113 av_store (priv, CD_CORO, &PL_sv_undef); 100 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
114 av_store (priv, CD_TYPE, newSViv (type)); 101 AvARRAY (priv)[CD_TYPE] = newSViv (type);
115 av_store (priv, CD_OK , &PL_sv_no); 102 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
116 av_store (priv, CD_PRIO, newSViv (0));
117 av_store (priv, CD_HITS, newSViv (0)); 103 AvARRAY (priv)[CD_HITS] = newSViv (0);
118 av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef); 104 AvARRAY (priv)[CD_GOT ] = newSViv (0);
119 SvREADONLY_on (priv); 105 SvREADONLY_on (priv);
120 106
121 w->callback = coro_std_cb; 107 w->callback = coro_std_cb;
122 w->ext_data = priv; 108 w->ext_data = priv;
123 109
124 hv_store ((HV *)SvRV (self), 110 /* make sure Event does not use PERL_MAGIC_uvar, which */
125 EV_CLASS, strlen (EV_CLASS), 111 /* we abuse for non-uvar purposes. */
126 rv, 0); 112 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_uvar, 0, 0, 0);
127
128 GEventAPI->start (w, 0);
129 } 113 }
114}
130 115
131void 116void
132_next(self) 117_next (SV *self)
133 SV * self
134 CODE: 118 CODE:
119{
135 pe_watcher *w = GEventAPI->sv_2watcher (self); 120 pe_watcher *w = GEventAPI->sv_2watcher (self);
136 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));
137 130
138 if (!w->running) 131 if (!w->running)
139 GEventAPI->start (w, 1); 132 GEventAPI->start (w, 1);
140 133
141 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes) 134 XSRETURN_YES; /* schedule */
142 { 135}
143 AvARRAY(priv)[CD_OK] = &PL_sv_no;
144 XSRETURN_NO;
145 }
146 else
147 {
148 if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
149 confess ("only one coroutine can wait for an event");
150 136
151 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); 137SV *
138_event (SV *self)
139 CODE:
140{
141 if (GIMME_V == G_VOID)
152 XSRETURN_YES; 142 XSRETURN_EMPTY;
153 }
154 143
155MODULE = Coro::Event PACKAGE = Coro 144 {
145 pe_watcher *w = GEventAPI->sv_2watcher (self);
146 AV *priv = (AV *)w->ext_data;
156 147
157# overwrite the ready function 148 RETVAL = newRV_inc ((SV *)priv);
158void
159ready(self)
160 SV * self
161 PROTOTYPE: $
162 CODE:
163 NEED_SCHEDULE;
164 CORO_READY (self);
165 149
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
166 161

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