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; |
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19 | |
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20 | #define PERL_MAGIC_coro_event 0x18 /* to avoid clashes with e.g. event */ |
35 | |
21 | |
36 | static void |
22 | static void |
37 | coro_std_cb(pe_event *pe) |
23 | coro_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]); |
41 | SV **cd_coro = &AvARRAY(priv)[CD_CORO]; |
27 | AV *cd_wait; |
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28 | SV *coro; |
42 | |
29 | |
43 | sv_setiv (AvARRAY(priv)[CD_PRIO], pe->prio); |
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44 | sv_setiv (AvARRAY(priv)[CD_HITS], pe->hits); |
30 | SvIV_set (AvARRAY (priv)[CD_HITS], pe->hits); |
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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); |
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48 | |
34 | |
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35 | cd_wait = (AV *)AvARRAY(priv)[CD_WAIT]; |
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36 | |
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37 | coro = av_shift (cd_wait); |
49 | if (*cd_coro != &PL_sv_undef) |
38 | if (coro != &PL_sv_undef) |
50 | { |
39 | { |
51 | CORO_READY (*cd_coro); |
40 | CORO_READY (coro); |
52 | SvREFCNT_dec (*cd_coro); |
41 | SvREFCNT_dec (coro); |
53 | *cd_coro = &PL_sv_undef; |
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54 | } |
42 | } |
55 | else |
43 | |
56 | { |
44 | if (av_len (cd_wait) < 0) |
57 | AvARRAY(priv)[CD_OK] = &PL_sv_yes; |
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58 | GEventAPI->stop (pe->up, 0); |
45 | GEventAPI->stop (pe->up, 0); |
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46 | } |
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47 | |
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48 | static void |
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49 | asynccheck_hook (void *data) |
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50 | { |
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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) |
59 | } |
53 | ; |
60 | } |
54 | } |
61 | |
55 | |
62 | static double |
56 | static double |
63 | prepare_hook (void *data) |
57 | prepare_hook (void *data) |
64 | { |
58 | { |
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59 | /* this yields once to another coro with any priority */ |
65 | while (CORO_NREADY) |
60 | if (CORO_NREADY) |
66 | 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 */ |
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72 | } |
67 | |
73 | |
68 | return 1e20; |
74 | static SV * |
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75 | event_next (SV *watcher, int cancel, int wantev) |
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76 | { |
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77 | pe_watcher *w = GEventAPI->sv_2watcher (watcher); |
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78 | AV *priv = (AV *)w->ext_data; |
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79 | |
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80 | if (AvARRAY (priv)[CD_OK] == &PL_sv_yes) |
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81 | { |
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82 | AvARRAY (priv)[CD_OK] = &PL_sv_no; |
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83 | |
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84 | if (cancel) |
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85 | GEventAPI->cancel (w); |
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86 | |
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87 | if (wantev) |
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88 | { |
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89 | SV *ev = newRV_inc ((SV *)priv); |
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90 | |
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91 | /* may need to bless it now */ |
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92 | if (!SvOBJECT (priv)) |
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93 | { |
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94 | SvREADONLY_off ((SV *)priv); |
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95 | sv_bless (ev, coro_event_event_stash); |
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96 | SvREADONLY_on ((SV *)priv); |
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97 | } |
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98 | |
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99 | return sv_2mortal (ev); |
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100 | } |
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101 | else |
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102 | return &PL_sv_undef; |
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103 | } |
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104 | |
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105 | av_push ((AV *)AvARRAY (priv)[CD_WAIT], SvREFCNT_inc (CORO_CURRENT)); |
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106 | |
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107 | if (!w->running) |
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108 | GEventAPI->start (w, 1); |
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109 | |
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110 | return 0; /* schedule */ |
69 | } |
111 | } |
70 | |
112 | |
71 | MODULE = Coro::Event PACKAGE = Coro::Event |
113 | MODULE = Coro::Event PACKAGE = Coro::Event |
72 | |
114 | |
73 | PROTOTYPES: ENABLE |
115 | PROTOTYPES: ENABLE |
74 | |
116 | |
75 | BOOT: |
117 | BOOT: |
76 | { |
118 | { |
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119 | coro_event_event_stash = gv_stashpv ("Coro::Event::Event", TRUE); |
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120 | |
77 | I_EVENT_API ("Coro::Event"); |
121 | I_EVENT_API ("Coro::Event"); |
78 | I_CORO_API ("Coro::Event"); |
122 | I_CORO_API ("Coro::Event"); |
79 | |
123 | |
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124 | GEventAPI->add_hook ("asynccheck", (void *)asynccheck_hook, 0); |
80 | GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); |
125 | GEventAPI->add_hook ("prepare", (void *)prepare_hook, 0); |
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126 | |
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127 | GCoroAPI->coro_event_next = event_next; |
81 | } |
128 | } |
82 | |
129 | |
83 | void |
130 | void |
84 | _install_std_cb(self,type) |
131 | _install_std_cb (SV *self, int type) |
85 | SV * self |
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86 | int type |
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87 | CODE: |
132 | CODE: |
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133 | { |
88 | pe_watcher *w = GEventAPI->sv_2watcher (self); |
134 | pe_watcher *w = GEventAPI->sv_2watcher (self); |
89 | |
135 | |
90 | if (WaFLAGS (w) & PE_PERLCB) |
136 | if (w->callback) |
91 | 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"); |
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138 | |
92 | { |
139 | { |
93 | AV *priv = newAV (); |
140 | AV *priv = newAV (); |
94 | SV *rv = newRV_noinc ((SV *)priv); |
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95 | |
141 | |
96 | av_extend (priv, CD_MAX); |
142 | av_fill (priv, CD_MAX); |
97 | av_store (priv, CD_CORO, &PL_sv_undef); |
143 | AvARRAY (priv)[CD_WAIT] = (SV *)newAV (); /* AV in AV _should_ not be exposed to perl */ |
98 | av_store (priv, CD_TYPE, newSViv (type)); |
144 | AvARRAY (priv)[CD_TYPE] = newSViv (type); |
99 | av_store (priv, CD_OK , &PL_sv_no); |
145 | AvARRAY (priv)[CD_OK ] = &PL_sv_no; |
100 | av_store (priv, CD_PRIO, newSViv (0)); |
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101 | av_store (priv, CD_HITS, newSViv (0)); |
146 | AvARRAY (priv)[CD_HITS] = newSViv (0); |
102 | av_store (priv, CD_GOT , type ? newSViv (0) : &PL_sv_undef); |
147 | AvARRAY (priv)[CD_GOT ] = newSViv (0); |
103 | SvREADONLY_on (priv); |
148 | SvREADONLY_on (priv); |
104 | |
149 | |
105 | w->callback = coro_std_cb; |
150 | w->callback = coro_std_cb; |
106 | w->ext_data = priv; |
151 | w->ext_data = priv; |
107 | |
152 | |
108 | hv_store ((HV *)SvRV (self), |
153 | sv_magicext (SvRV (self), newRV_noinc ((SV *)priv), PERL_MAGIC_coro_event, 0, (char *)w, 0); |
109 | EV_CLASS, strlen (EV_CLASS), |
154 | } |
110 | rv, 0); |
155 | } |
111 | |
156 | |
112 | GEventAPI->start (w, 0); |
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113 | } |
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114 | |
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115 | void |
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116 | _next(self) |
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117 | SV * self |
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118 | CODE: |
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119 | pe_watcher *w = GEventAPI->sv_2watcher (self); |
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120 | AV *priv = (AV *)w->ext_data; |
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121 | |
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122 | if (!w->running) |
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123 | GEventAPI->start (w, 1); |
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124 | |
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125 | if (AvARRAY(priv)[CD_OK] == &PL_sv_yes) |
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126 | { |
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127 | AvARRAY(priv)[CD_OK] = &PL_sv_no; |
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128 | XSRETURN_NO; |
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129 | } |
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130 | else |
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131 | { |
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132 | if (AvARRAY(priv)[CD_CORO] != &PL_sv_undef) |
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133 | confess ("only one coroutine can wait for an event"); |
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134 | |
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135 | AvARRAY(priv)[CD_CORO] = SvREFCNT_inc (CORO_CURRENT); |
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136 | XSRETURN_YES; |
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137 | } |
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138 | |
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