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 | |
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5 | #include <assert.h> |
5 | #include <string.h> |
6 | #include <string.h> |
6 | |
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7 | /* this useful idiom is unfortunately missing... */ |
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8 | static void |
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9 | confess (const char *msg) |
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10 | { |
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11 | dSP; |
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12 | |
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13 | PUSHMARK(SP); |
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14 | XPUSHs (sv_2mortal(newSVpv("only one coroutine can wait for an event at any given time",0))); |
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15 | PUTBACK; |
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16 | call_pv ("Carp::confess", G_VOID); |
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17 | } |
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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 :( */ |
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24 | #endif |
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25 | |
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26 | #define CD_CORO 0 |
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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 */ |
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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" |
18 | static HV *coro_event_event_stash; |
35 | |
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36 | static pe_idle *scheduler; |
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37 | static int do_schedule; |
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38 | |
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39 | #define NEED_SCHEDULE if (!do_schedule) \ |
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40 | { \ |
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41 | do_schedule = 1; \ |
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42 | GEventAPI->now ((pe_watcher *)scheduler); \ |
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43 | } |
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44 | |
19 | |
45 | static void |
20 | static void |
46 | coro_std_cb(pe_event *pe) |
21 | coro_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; |
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26 | SV *coro; |
51 | |
27 | |
52 | sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio); |
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53 | sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); |
28 | SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits); |
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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); |
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57 | |
32 | |
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33 | cd_wait = (AV *)AvARRAY(priv)[CD_WAIT]; |
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34 | |
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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; |
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63 | NEED_SCHEDULE; |
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64 | } |
40 | } |
65 | else |
41 | |
66 | { |
42 | if (av_len (cd_wait) < 0) |
67 | AvARRAY(priv)[CD_OK] = &PL_sv_yes; |
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68 | GEventAPI->stop (pe->up, 0); |
43 | GEventAPI->stop (pe->up, 0); |
69 | } |
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70 | } |
44 | } |
71 | |
45 | |
72 | static void |
46 | static void |
73 | scheduler_cb(pe_event *pe) |
47 | asynccheck_hook (void *data) |
74 | { |
48 | { |
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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 | ; |
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52 | } |
77 | |
53 | |
78 | do_schedule = 0; |
54 | static double |
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55 | prepare_hook (void *data) |
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56 | { |
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57 | /* this yields once to another coro with any priority */ |
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58 | if (CORO_NREADY) |
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59 | { |
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60 | CORO_CEDE_NOTSELF; |
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61 | /* |
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62 | * timers might have changed, and Event fails to notice this |
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63 | * so we have to assume the worst. If Event didn't have that bug, |
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64 | * we would only need to do this if CORO_NREADY is != 0 now. |
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65 | */ |
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66 | return 0.; |
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67 | } |
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68 | else |
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69 | return 85197.73; /* this is as good as any value, but it factors badly with common values */ |
79 | } |
70 | } |
80 | |
71 | |
81 | MODULE = Coro::Event PACKAGE = Coro::Event |
72 | MODULE = Coro::Event PACKAGE = Coro::Event |
82 | |
73 | |
83 | PROTOTYPES: ENABLE |
74 | PROTOTYPES: ENABLE |
84 | |
75 | |
85 | BOOT: |
76 | BOOT: |
86 | { |
77 | { |
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78 | coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE); |
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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; |
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93 | scheduler->base.prio = PE_PRIO_NORMAL; /* StarvePrio */ |
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94 | scheduler->min_interval = newSVnv (0); |
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95 | scheduler->max_interval = newSVnv (0); |
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96 | GEventAPI->stop ((pe_watcher *)scheduler, 0); |
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97 | } |
85 | } |
98 | |
86 | |
99 | void |
87 | void |
100 | _install_std_cb(self,type) |
88 | _install_std_cb (SV *self, int type) |
101 | SV * self |
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102 | int type |
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103 | CODE: |
89 | CODE: |
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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"); |
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95 | |
108 | { |
96 | { |
109 | AV *priv = newAV (); |
97 | AV *priv = newAV (); |
110 | SV *rv = newRV_noinc ((SV *)priv); |
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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)); |
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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 | |
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128 | GEventAPI->start (w, 0); |
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129 | } |
113 | } |
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114 | } |
130 | |
115 | |
131 | void |
116 | void |
132 | _next(self) |
117 | _next (SV *self) |
133 | SV * self |
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134 | CODE: |
118 | CODE: |
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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; |
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122 | |
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123 | if (AvARRAY (priv)[CD_OK] == &PL_sv_yes) |
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124 | { |
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125 | AvARRAY (priv)[CD_OK] = &PL_sv_no; |
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126 | XSRETURN_NO; /* got an event */ |
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127 | } |
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128 | |
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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; |
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144 | XSRETURN_NO; |
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145 | } |
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146 | else |
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147 | { |
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148 | if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef) |
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149 | confess ("only one coroutine can wait for an event"); |
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150 | |
136 | |
151 | AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); |
137 | SV * |
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138 | _event (SV *self) |
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139 | CODE: |
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140 | { |
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141 | if (GIMME_V == G_VOID) |
152 | XSRETURN_YES; |
142 | XSRETURN_EMPTY; |
153 | } |
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154 | |
143 | |
155 | MODULE = Coro::Event PACKAGE = Coro |
144 | { |
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145 | pe_watcher *w = GEventAPI->sv_2watcher (self); |
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146 | AV *priv = (AV *)w->ext_data; |
156 | |
147 | |
157 | # overwrite the ready function |
148 | RETVAL = newRV_inc ((SV *)priv); |
158 | void |
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159 | ready(self) |
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160 | SV * self |
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161 | PROTOTYPE: $ |
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162 | CODE: |
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163 | NEED_SCHEDULE; |
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164 | CORO_READY (self); |
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165 | |
149 | |
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150 | /* may need to bless it now */ |
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151 | if (!SvOBJECT (priv)) |
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152 | { |
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153 | SvREADONLY_off ((SV *)priv); |
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154 | sv_bless (RETVAL, coro_event_event_stash); |
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155 | SvREADONLY_on ((SV *)priv); |
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156 | } |
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157 | } |
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158 | } |
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159 | OUTPUT: |
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160 | RETVAL |
166 | |
161 | |