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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 1.13 by root, Fri Dec 1 19:41:06 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 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
22#ifndef PE_PERLCB
23# define PE_PERLCB 0x020 /* not public, but we need it :( */
24#endif
25 10
26#define CD_CORO 0 11#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 */ 14#define CD_PRIO 3 /* hardcoded in Coro::Event */
30#define CD_HITS 4 /* hardcoded in Coro::Event */ 15#define CD_HITS 4 /* hardcoded in Coro::Event */
31#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */ 16#define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */
32#define CD_MAX 5 17#define CD_MAX 5
33 18
34#define EV_CLASS "Coro::Event"
35
36static void 19static void
37coro_std_cb(pe_event *pe) 20coro_std_cb (pe_event *pe)
38{ 21{
39 AV *priv = (AV *)pe->ext_data; 22 AV *priv = (AV *)pe->ext_data;
40 IV type = SvIV (*av_fetch (priv, CD_TYPE, 1)); 23 IV type = SvIV (AvARRAY (priv)[CD_TYPE]);
41 SV **cd_coro = &AvARRAY(priv)[CD_CORO]; 24 SV **cd_coro;
42 25
43 sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio); 26 SvIV_set (AvARRAY (priv)[CD_PRIO], pe->prio);
44 sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); 27 SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits);
45 28
46 if (type == 1) 29 if (type == 1)
47 sv_setiv (AvARRAY(priv)[CD_GOT], ((pe_ioevent *)pe)->got); 30 SvIV_set (AvARRAY (priv)[CD_GOT], ((pe_ioevent *)pe)->got);
48 31
32 GEventAPI->stop (pe->up, 0);
33
34 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
35
36 cd_coro = &AvARRAY(priv)[CD_CORO];
49 if (*cd_coro != &PL_sv_undef) 37 if (*cd_coro != &PL_sv_undef)
50 { 38 {
39 AvARRAY (priv)[CD_OK] = &PL_sv_yes;
51 CORO_READY (*cd_coro); 40 CORO_READY (*cd_coro);
52 SvREFCNT_dec (*cd_coro); 41 SvREFCNT_dec (*cd_coro);
53 *cd_coro = &PL_sv_undef; 42 *cd_coro = &PL_sv_undef;
54 } 43 }
55 else
56 {
57 AvARRAY(priv)[CD_OK] = &PL_sv_yes;
58 GEventAPI->stop (pe->up, 0);
59 }
60} 44}
61 45
62static double 46static void
63prepare_hook (void *data) 47asynccheck_hook (void *data)
64{ 48{
49 /* ceding from C means allocating a stack, but we assume this is a rare case */
65 while (CORO_NREADY) 50 while (CORO_NREADY)
66 CORO_CEDE; 51 CORO_CEDE;
67
68 return 1e20;
69} 52}
70 53
71MODULE = Coro::Event PACKAGE = Coro::Event 54MODULE = Coro::Event PACKAGE = Coro::Event
72 55
73PROTOTYPES: ENABLE 56PROTOTYPES: ENABLE
… …
75BOOT: 58BOOT:
76{ 59{
77 I_EVENT_API ("Coro::Event"); 60 I_EVENT_API ("Coro::Event");
78 I_CORO_API ("Coro::Event"); 61 I_CORO_API ("Coro::Event");
79 62
80 GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); 63 GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0);
81} 64}
82 65
83void 66void
84_install_std_cb(self,type) 67_install_std_cb (SV *self, int type)
85 SV * self
86 int type
87 CODE: 68 CODE:
69{
88 pe_watcher *w = GEventAPI->sv_2watcher (self); 70 pe_watcher *w = GEventAPI->sv_2watcher (self);
89 71
90 if (WaFLAGS (w) & PE_PERLCB) 72 if (w->callback)
91 croak ("Coro::Event watchers must not have a perl callback (see Coro::Event), caught"); 73 croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught");
74
92 { 75 {
93 AV *priv = newAV (); 76 AV *priv = newAV ();
94 SV *rv = newRV_noinc ((SV *)priv); 77 SV *rv = newRV_noinc ((SV *)priv);
95 78
96 av_extend (priv, CD_MAX); 79 av_extend (priv, CD_MAX);
97 av_store (priv, CD_CORO, &PL_sv_undef); 80 AvARRAY (priv)[CD_CORO] = &PL_sv_undef;
98 av_store (priv, CD_TYPE, newSViv (type)); 81 AvARRAY (priv)[CD_TYPE] = newSViv (type);
99 av_store (priv, CD_OK , &PL_sv_no); 82 AvARRAY (priv)[CD_OK ] = &PL_sv_no;
100 av_store (priv, CD_PRIO, newSViv (0)); 83 AvARRAY (priv)[CD_PRIO] = newSViv (0);
101 av_store (priv, CD_HITS, newSViv (0)); 84 AvARRAY (priv)[CD_HITS] = newSViv (0);
102 av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef); 85 AvARRAY (priv)[CD_GOT ] = newSViv (0);
103 SvREADONLY_on (priv); 86 SvREADONLY_on (priv);
104 87
105 w->callback = coro_std_cb; 88 w->callback = coro_std_cb;
106 w->ext_data = priv; 89 w->ext_data = priv;
107 90
108 hv_store ((HV *)SvRV (self), 91 /* make sure Event does not use PERL_MAGIC_uvar, which */
109 EV_CLASS, strlen (EV_CLASS), 92 /* we abuse for non-uvar purposes. */
110 rv, 0); 93 sv_magicext (SvRV (self), rv, PERL_MAGIC_uvar, 0, 0, 0);
111
112 GEventAPI->start (w, 0);
113 } 94 }
95}
114 96
115void 97void
116_next(self) 98_next (SV *self)
117 SV * self
118 CODE: 99 CODE:
100{
119 pe_watcher *w = GEventAPI->sv_2watcher (self); 101 pe_watcher *w = GEventAPI->sv_2watcher (self);
120 AV *priv = (AV *)w->ext_data; 102 AV *priv = (AV *)w->ext_data;
103
104 if (AvARRAY (priv)[CD_OK] == &PL_sv_yes)
105 {
106 AvARRAY (priv)[CD_OK] = &PL_sv_no;
107 XSRETURN_NO; /* got an event */
108 }
121 109
122 if (!w->running) 110 if (!w->running)
123 GEventAPI->start (w, 1); 111 GEventAPI->start (w, 1);
124 112
125 if (AvARRAY(priv)[CD_OK] == &PL_sv_yes)
126 {
127 AvARRAY(priv)[CD_OK] = &PL_sv_no;
128 XSRETURN_NO;
129 }
130 else
131 {
132 if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef) 113 if (AvARRAY (priv)[CD_CORO] == &PL_sv_undef)
133 confess ("only one coroutine can wait for an event"); 114 AvARRAY (priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT);
115 else if (AvARRAY (priv)[CD_CORO] != CORO_CURRENT)
116 croak ("Coro::Event::next can only be called from a single coroutine at a time, caught");
134 117
135 AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); 118 XSRETURN_YES; /* schedule */
136 XSRETURN_YES; 119}
137 }
138 120

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