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/cvs/Coro/Event/Event.xs
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Comparing Coro/Event/Event.xs (file contents):
Revision 1.12 by root, Fri Dec 1 02:17:37 2006 UTC vs.
Revision 1.23 by root, Tue Oct 9 22:29:27 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
20#define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */
35 21
36static void 22static void
37coro_std_cb(pe_event *pe) 23coro_std_cb (pe_event *pe)
38{ 24{
39 AV *priv = (AV *)pe->ext_data; 25 AV *priv = (AV *)pe->ext_data;
40 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 26 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
27 AV *cd_wait;
41 SV **cd_coro; 28 SV *coro;
42 29
43 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio);
44 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);
45 32
46 if (type == 1) 33 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
47 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got);
48 34
49 GEventAPI->stop (pe->up, 0); 35 cd_wait = (AV *)AvARRAY(priv)[CD_WAIT];
50 36
51 AvARRAY(priv)[CD_OK] = &PL_sv_yes; 37 coro = av_shift (cd_wait);
38 if (coro != &PL_sv_undef)
39 {
40 CORO_READY (coro);
41 SvREFCNT_dec (coro);
42 }
52 43
53 cd_coro = &AvARRAY(priv)[CD_CORO]; 44 if (av_len (cd_wait) < 0)
54 if (*cd_coro != &PL_sv_undef) 45 GEventAPI->stop (pe->up, 0);
46}
47
48static void
49asynccheck_hook (void *data)
50{
51 /* this loops as long as we have _other_ coros with the same or higher priority */
52 while (CORO_NREADY && CORO_CEDE)
55 { 53 ;
56 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
57 CORO_READY (*cd_coro);
58 SvREFCNT_dec (*cd_coro);
59 *cd_coro = &PL_sv_undef;
60 }
61} 54}
62 55
63static double 56static double
64prepare_hook (void *data) 57prepare_hook (void *data)
65{ 58{
59 /* this yields once to another coro with any priority */
66 while (CORO_NREADY) 60 if (CORO_NREADY)
67 CORO_CEDE; 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 */
72}
68 73
69 return 1e10; 74static SV *
75event_next (SV *watcher, int cancel, int wantev)
76{
77 pe_watcher *w = GEventAPI->sv_2watcher (watcher);
78 AV *priv = (AV *)w->ext_data;
79
80 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
81 {
82 AvARRAY (priv)[CD_OK] = &PL_sv_no;
83
84 if (cancel)
85 GEventAPI->cancel (w);
86
87 if (wantev)
88 {
89 SV *ev = newRV_inc ((SV *)priv);
90
91 /* may need to bless it now */
92 if (!SvOBJECT (priv))
93 {
94 SvREADONLY_off ((SV *)priv);
95 sv_bless (ev, coro_event_event_stash);
96 SvREADONLY_on ((SV *)priv);
97 }
98
99 return sv_2mortal (ev);
100 }
101 else
102 return &PL_sv_undef;
103 }
104
105 av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT));
106
107 if (!w->running)
108 GEventAPI->start (w, 1);
109
110 return 0; /* schedule */
70} 111}
71 112
72MODULE = Coro::Event PACKAGE = Coro::Event 113MODULE = Coro::Event PACKAGE = Coro::Event
73 114
74PROTOTYPES: ENABLE 115PROTOTYPES: ENABLE
75 116
76BOOT: 117BOOT:
77{ 118{
119 coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE);
120
78 I_EVENT_API ("Coro::Event"); 121 I_EVENT_API ("Coro::Event");
79 I_CORO_API ("Coro::Event"); 122 I_CORO_API ("Coro::Event");
80 123
124 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
81 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); 125 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0);
126
127 GCoroAPI->coro_event_next = event_next;
82} 128}
83 129
84void 130void
85_install_std_cb(self,type) 131_install_std_cb (SV *self, int type)
86 SV * self
87 int type
88 CODE: 132 CODE:
89{ 133{
90 pe_watcher *w = GEventAPI->sv_2watcher (self); 134 pe_watcher *w = GEventAPI->sv_2watcher (self);
91 135
92 if (WaFLAGS (w) & PE_PERLCB) 136 if (w->callback)
93 croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught"); 137 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
138
94 { 139 {
95 AV *priv = newAV (); 140 AV *priv = newAV ();
96 SV *rv = newRV_noinc ((SV *)priv);
97 141
98 av_extend (priv, CD_MAX); 142 av_fill (priv, CD_MAX);
99 av_store (priv, CD_CORO, &PL_sv_undef); 143 AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */
100 av_store (priv, CD_TYPE, newSViv (type)); 144 AvARRAY (priv)[CD_TYPE] = newSViv (type);
101 av_store (priv, CD_OK , &PL_sv_no); 145 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
102 av_store (priv, CD_PRIO, newSViv (0));
103 av_store (priv, CD_HITS, newSViv (0)); 146 AvARRAY (priv)[CD_HITS] = newSViv (0);
104 av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef); 147 AvARRAY (priv)[CD_GOT ] = newSViv (0);
105 SvREADONLY_on (priv); 148 SvREADONLY_on (priv);
106 149
107 w->callback = coro_std_cb; 150 w->callback = coro_std_cb;
108 w->ext_data = priv; 151 w->ext_data = priv;
109 152
110 hv_store ((HV *)SvRV (self), 153 sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_coro_event, 0, (char *)w, 0);
111 EV_CLASS, strlen (EV_CLASS),
112 rv, 0);
113
114 GEventAPI->start (w, 0);
115 } 154 }
116} 155}
117 156
118void
119_next(self)
120 SV * self
121 CODE:
122{
123 pe_watcher *w = GEventAPI->sv_2watcher (self);
124 AV *priv = (AV *)w->ext_data;
125
126 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
127 {
128 AvARRAY(priv)[CD_OK] = &PL_sv_no;
129 XSRETURN_NO;
130 }
131
132 if (!w->running)
133 GEventAPI->start (w, 1);
134
135 if (AvARRAY(priv)[CD_CORO] == &PL_sv_undef)
136 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
137
138 XSRETURN_YES;
139}
140

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