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/cvs/Coro/Event/Event.xs
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Comparing Coro/Event/Event.xs (file contents):
Revision 1.10 by root, Thu Nov 23 23:54:02 2006 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/* 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;
19
20static int
21coro_ev_free (pTHX_ SV *sv, MAGIC *mg)
22{
23 *(void **)mg->mg_ptr = 0;
24
25 return 0;
26}
27
28#define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */
29
30static MGVTBL vtbl_coro_event = {0, 0, 0, 0, coro_ev_free};
35 31
36static void 32static void
37coro_std_cb(pe_event *pe) 33coro_std_cb (pe_event *pe)
38{ 34{
35 if (pe->up->ext_data)
36 {
39 AV *priv = (AV *)pe->ext_data; 37 AV *priv = (AV *)pe->ext_data;
40 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 38 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
41 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 39 AV *cd_wait;
40 SV *coro;
42 41
43 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
44 sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); 42 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
43 SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0);
45 44
46 if (type == 1) 45 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
47 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
48 46
47 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
48
49 coro = av_shift (cd_wait);
49 if (*cd_coro != &PL_sv_undef) 50 if (coro != &PL_sv_undef)
50 { 51 {
51 CORO_READY (*cd_coro); 52 CORO_READY (coro);
52 SvREFCNT_dec (*cd_coro); 53 SvREFCNT_dec (coro);
53 *cd_coro = &PL_sv_undef; 54 }
55
56 if (av_len (cd_wait) < 0)
57 GEventAPI->stop (pe->up, 0);
54 } 58 }
55 else 59}
60
61static void
62asynccheck_hook (void *data)
63{
64 /* this loops as long as we have _other_ coros with the same or higher priority */
65 while (CORO_NREADY && CORO_CEDE)
56 { 66 ;
57 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
58 GEventAPI->stop (pe->up, 0);
59 }
60} 67}
61 68
62static double 69static double
63prepare_hook (void *data) 70prepare_hook (void *data)
64{ 71{
72 /* this yields once to another coro with any priority */
65 while (CORO_NREADY) 73 if (CORO_NREADY)
66 CORO_CEDE; 74 {
67 75 CORO_CEDE_NOTSELF;
68 return 1e20; 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 */
69} 85}
70 86
71MODULE = Coro::Event PACKAGE = Coro::Event 87MODULE = Coro::Event PACKAGE = Coro::Event
72 88
73PROTOTYPES: ENABLE 89PROTOTYPES: ENABLE
74 90
75BOOT: 91BOOT:
76{ 92{
93 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
94
77 I_EVENT_API ("Coro::Event"); 95 I_EVENT_API ("Coro::Event");
78 I_CORO_API ("Coro::Event"); 96 I_CORO_API ("Coro::Event");
79 97
98 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
80 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); 99 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
81} 100}
82 101
83void 102void
84_install_std_cb(self,type) 103_install_std_cb (SV *self, int type)
85 SV * self
86 int type
87 CODE: 104 CODE:
105{
88 pe_watcher *w = GEventAPI->sv_2watcher (self); 106 pe_watcher *w = GEventAPI->sv_2watcher (self);
89 107
90 if (WaFLAGS (w) & PE_PERLCB) 108 if (w->callback)
91 croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught"); 109 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
110
92 { 111 {
93 AV *priv = newAV (); 112 AV *priv = newAV ();
94 SV *rv = newRV_noinc ((SV *)priv);
95 113
96 av_extend (priv, CD_MAX); 114 av_fill (priv, CD_MAX);
97 av_store (priv, CD_CORO, &PL_sv_undef); 115 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
98 av_store (priv, CD_TYPE, newSViv (type)); 116 AvARRAY (priv)[CD_TYPE] = newSViv (type);
99 av_store (priv, CD_OK , &PL_sv_no); 117 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
100 av_store (priv, CD_PRIO, newSViv (0));
101 av_store (priv, CD_HITS, newSViv (0)); 118 AvARRAY (priv)[CD_HITS] = newSViv (0);
102 av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef); 119 AvARRAY (priv)[CD_GOT ] = newSViv (0);
103 SvREADONLY_on (priv); 120 SvREADONLY_on (priv);
104 121
105 w->callback = coro_std_cb; 122 w->callback = coro_std_cb;
106 w->ext_data = priv; 123 w->ext_data = priv;
107 124
108 hv_store ((HV *)SvRV (self), 125 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_coro_event, &vtbl_coro_event, &w->ext_data, 0);
109 EV_CLASS, strlen (EV_CLASS),
110 rv, 0);
111
112 GEventAPI->start (w, 0);
113 } 126 }
127}
114 128
115void 129void
116_next(self) 130_next (SV *self)
117 SV * self
118 CODE: 131 CODE:
132{
119 pe_watcher *w = GEventAPI->sv_2watcher (self); 133 pe_watcher *w = GEventAPI->sv_2watcher (self);
120 AV *priv = (AV *)w->ext_data; 134 AV *priv = (AV *)w->ext_data;
135
136 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
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));
121 143
122 if (!w->running) 144 if (!w->running)
123 GEventAPI->start (w, 1); 145 GEventAPI->start (w, 1);
124 146
125 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes) 147 XSRETURN_YES; /* schedule */
126 { 148}
127 AvARRAY(priv)[CD_OK] = &PL_sv_no;
128 XSRETURN_NO;
129 }
130 else
131 {
132 if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef)
133 confess ("only one coroutine can wait for an event");
134 149
135 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); 150SV *
151_event (SV *self)
152 CODE:
153{
154 if (GIMME_V == G_VOID)
136 XSRETURN_YES; 155 XSRETURN_EMPTY;
137 }
138 156
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

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