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6 | #include <string.h> |
6 | #include <string.h> |
7 | |
7 | |
8 | #include "EventAPI.h" |
8 | #include "EventAPI.h" |
9 | #include "../Coro/CoroAPI.h" |
9 | #include "../Coro/CoroAPI.h" |
10 | |
10 | |
11 | #define CD_CORO 0 |
11 | #define CD_WAIT 0 /* wait queue */ |
12 | #define CD_TYPE 1 |
12 | #define CD_TYPE 1 |
13 | #define CD_OK 2 |
13 | #define CD_OK 2 |
14 | #define CD_PRIO 3 /* hardcoded in Coro::Event */ |
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15 | #define CD_HITS 4 /* hardcoded in Coro::Event */ |
14 | #define CD_HITS 3 /* hardcoded in Coro::Event */ |
16 | #define CD_GOT 5 /* hardcoded in Coro::Event, Coro::Handle */ |
15 | #define CD_GOT 4 /* hardcoded in Coro::Event, Coro::Handle */ |
17 | #define CD_MAX 5 |
16 | #define CD_MAX 4 |
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17 | |
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18 | static HV *coro_event_event_stash; |
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19 | |
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20 | #define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */ |
18 | |
21 | |
19 | static void |
22 | static void |
20 | coro_std_cb (pe_event *pe) |
23 | coro_std_cb (pe_event *pe) |
21 | { |
24 | { |
22 | AV *priv = (AV *)pe->ext_data; |
25 | AV *priv = (AV *)pe->ext_data; |
23 | IV type = SvIV (AvARRAY (priv)[CD_TYPE]); |
26 | IV type = SvIV (AvARRAY (priv)[CD_TYPE]); |
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27 | AV *cd_wait; |
24 | SV **cd_coro; |
28 | SV *coro; |
25 | |
29 | |
26 | SvIV_set (AvARRAY (priv)[CD_PRIO], pe->prio); |
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27 | SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits); |
30 | SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits); |
28 | |
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29 | if (type == 1) |
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30 | SvIV_set (AvARRAY (priv)[CD_GOT], ((pe_ioevent *)pe)->got); |
31 | SvIV_set (AvARRAY (priv)[CD_GOT], type ? ((pe_ioevent *)pe)->got : 0); |
31 | |
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32 | GEventAPI->stop (pe->up, 0); |
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33 | |
32 | |
34 | AvARRAY (priv)[CD_OK] = &PL_sv_yes; |
33 | AvARRAY (priv)[CD_OK] = &PL_sv_yes; |
35 | |
34 | |
36 | cd_coro = &AvARRAY(priv)[CD_CORO]; |
35 | cd_wait = (AV *)AvARRAY(priv)[CD_WAIT]; |
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36 | |
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37 | coro = av_shift (cd_wait); |
37 | if (*cd_coro != &PL_sv_undef) |
38 | if (coro != &PL_sv_undef) |
38 | { |
39 | { |
39 | AvARRAY (priv)[CD_OK] = &PL_sv_yes; |
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40 | CORO_READY (*cd_coro); |
40 | CORO_READY (coro); |
41 | SvREFCNT_dec (*cd_coro); |
41 | SvREFCNT_dec (coro); |
42 | *cd_coro = &PL_sv_undef; |
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43 | } |
42 | } |
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43 | |
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44 | if (av_len (cd_wait) < 0) |
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45 | GEventAPI->stop (pe->up, 0); |
44 | } |
46 | } |
45 | |
47 | |
46 | static void |
48 | static void |
47 | asynccheck_hook (void *data) |
49 | asynccheck_hook (void *data) |
48 | { |
50 | { |
49 | /* ceding from C means allocating a stack, but we assume this is a rare case */ |
51 | /* this loops as long as we have _other_ coros with the same or higher priority */ |
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52 | while (CORO_NREADY && CORO_CEDE) |
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53 | ; |
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54 | } |
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55 | |
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56 | static double |
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57 | prepare_hook (void *data) |
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58 | { |
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59 | /* this yields once to another coro with any priority */ |
50 | while (CORO_NREADY) |
60 | if (CORO_NREADY) |
51 | CORO_CEDE; |
61 | { |
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62 | CORO_CEDE_NOTSELF; |
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63 | /* |
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64 | * timers might have changed, and Event fails to notice this |
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65 | * so we have to assume the worst. If Event didn't have that bug, |
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66 | * we would only need to do this if CORO_NREADY is != 0 now. |
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67 | */ |
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68 | return 0.; |
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69 | } |
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70 | else |
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71 | return 85197.73; /* this is as good as any value, but it factors badly with common values */ |
52 | } |
72 | } |
53 | |
73 | |
54 | MODULE = Coro::Event PACKAGE = Coro::Event |
74 | MODULE = Coro::Event PACKAGE = Coro::Event |
55 | |
75 | |
56 | PROTOTYPES: ENABLE |
76 | PROTOTYPES: ENABLE |
57 | |
77 | |
58 | BOOT: |
78 | BOOT: |
59 | { |
79 | { |
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80 | coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE); |
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81 | |
60 | I_EVENT_API ("Coro::Event"); |
82 | I_EVENT_API ("Coro::Event"); |
61 | I_CORO_API ("Coro::Event"); |
83 | I_CORO_API ("Coro::Event"); |
62 | |
84 | |
63 | GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0); |
85 | GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0); |
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86 | GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); |
64 | } |
87 | } |
65 | |
88 | |
66 | void |
89 | void |
67 | _install_std_cb (SV *self, int type) |
90 | _install_std_cb (SV *self, int type) |
68 | CODE: |
91 | CODE: |
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72 | if (w->callback) |
95 | if (w->callback) |
73 | croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught"); |
96 | croak ("Coro::Event watchers must not have a callback (see Coro::Event), caught"); |
74 | |
97 | |
75 | { |
98 | { |
76 | AV *priv = newAV (); |
99 | AV *priv = newAV (); |
77 | SV *rv = newRV_noinc ((SV *)priv); |
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78 | |
100 | |
79 | av_extend (priv, CD_MAX); |
101 | av_fill (priv, CD_MAX); |
80 | AvARRAY (priv)[CD_CORO] = &PL_sv_undef; |
102 | AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */ |
81 | AvARRAY (priv)[CD_TYPE] = newSViv (type); |
103 | AvARRAY (priv)[CD_TYPE] = newSViv (type); |
82 | AvARRAY (priv)[CD_OK ] = &PL_sv_no; |
104 | AvARRAY (priv)[CD_OK ] = &PL_sv_no; |
83 | AvARRAY (priv)[CD_PRIO] = newSViv (0); |
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84 | AvARRAY (priv)[CD_HITS] = newSViv (0); |
105 | AvARRAY (priv)[CD_HITS] = newSViv (0); |
85 | AvARRAY (priv)[CD_GOT ] = newSViv (0); |
106 | AvARRAY (priv)[CD_GOT ] = newSViv (0); |
86 | SvREADONLY_on (priv); |
107 | SvREADONLY_on (priv); |
87 | |
108 | |
88 | w->callback = coro_std_cb; |
109 | w->callback = coro_std_cb; |
89 | w->ext_data = priv; |
110 | w->ext_data = priv; |
90 | |
111 | |
91 | /* make sure Event does not use PERL_MAGIC_uvar, which */ |
112 | { |
92 | /* we abuse for non-uvar purposes. */ |
113 | SV *mob = newRV_noinc ((SV *)priv); |
93 | sv_magicext (SvRV (self), rv, PERL_MAGIC_uvar, 0, 0, 0); |
114 | sv_magicext (SvRV (self), mob, PERL_MAGIC_coro_event, 0, (char *)w, 0); |
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115 | SvREFCNT_dec (mob); /* sv_magicext increments the refcount */ |
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116 | } |
94 | } |
117 | } |
95 | } |
118 | } |
96 | |
119 | |
97 | void |
120 | void |
98 | _next (SV *self) |
121 | _next (SV *self) |
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105 | { |
128 | { |
106 | AvARRAY (priv)[CD_OK] = &PL_sv_no; |
129 | AvARRAY (priv)[CD_OK] = &PL_sv_no; |
107 | XSRETURN_NO; /* got an event */ |
130 | XSRETURN_NO; /* got an event */ |
108 | } |
131 | } |
109 | |
132 | |
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133 | av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT)); |
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134 | |
110 | if (!w->running) |
135 | if (!w->running) |
111 | GEventAPI->start (w, 1); |
136 | GEventAPI->start (w, 1); |
112 | |
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113 | if (AvARRAY (priv)[CD_CORO] == &PL_sv_undef) |
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114 | AvARRAY (priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); |
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115 | else if (AvARRAY (priv)[CD_CORO] != CORO_CURRENT) |
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116 | croak ("Coro::Event::next can only be called from a single coroutine at a time, caught"); |
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117 | |
137 | |
118 | XSRETURN_YES; /* schedule */ |
138 | XSRETURN_YES; /* schedule */ |
119 | } |
139 | } |
120 | |
140 | |
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141 | SV * |
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142 | _event (SV *self) |
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143 | CODE: |
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144 | { |
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145 | if (GIMME_V == G_VOID) |
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146 | XSRETURN_EMPTY; |
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147 | |
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148 | { |
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149 | pe_watcher *w = GEventAPI->sv_2watcher (self); |
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150 | AV *priv = (AV *)w->ext_data; |
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151 | |
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152 | RETVAL = newRV_inc ((SV *)priv); |
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153 | |
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154 | /* may need to bless it now */ |
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155 | if (!SvOBJECT (priv)) |
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156 | { |
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157 | SvREADONLY_off ((SV *)priv); |
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158 | sv_bless (RETVAL, coro_event_event_stash); |
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159 | SvREADONLY_on ((SV *)priv); |
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160 | } |
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161 | } |
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162 | } |
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163 | OUTPUT: |
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164 | RETVAL |
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165 | |