1 |
root |
1.1 |
#ifndef SCHMORP_PERL_H_ |
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#define SCHMORP_PERL_H_ |
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4 |
root |
1.2 |
/* WARNING |
5 |
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* This header file is a shared resource between many modules. |
6 |
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*/ |
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8 |
root |
1.5 |
#include <signal.h> |
9 |
root |
1.6 |
#include <errno.h> |
10 |
root |
1.5 |
|
11 |
root |
1.11 |
#if defined(WIN32 ) || defined(_MINIX) |
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# define SCHMORP_H_PREFER_SELECT 1 |
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#endif |
14 |
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15 |
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#if !SCHMORP_H_PREFER_SELECT |
16 |
root |
1.5 |
# include <poll.h> |
17 |
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#endif |
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19 |
root |
1.1 |
/* useful stuff, used by schmorp mostly */ |
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21 |
root |
1.4 |
#include "patchlevel.h" |
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23 |
root |
1.1 |
#define PERL_VERSION_ATLEAST(a,b,c) \ |
24 |
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(PERL_REVISION > (a) \ |
25 |
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|| (PERL_REVISION == (a) \ |
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&& (PERL_VERSION > (b) \ |
27 |
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|| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c))))) |
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29 |
root |
1.8 |
#ifndef PERL_MAGIC_ext |
30 |
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# define PERL_MAGIC_ext '~' |
31 |
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#endif |
32 |
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33 |
root |
1.1 |
#if !PERL_VERSION_ATLEAST (5,6,0) |
34 |
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# ifndef PL_ppaddr |
35 |
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# define PL_ppaddr ppaddr |
36 |
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# endif |
37 |
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# ifndef call_sv |
38 |
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# define call_sv perl_call_sv |
39 |
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# endif |
40 |
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# ifndef get_sv |
41 |
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# define get_sv perl_get_sv |
42 |
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# endif |
43 |
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# ifndef get_cv |
44 |
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# define get_cv perl_get_cv |
45 |
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# endif |
46 |
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# ifndef IS_PADGV |
47 |
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# define IS_PADGV(v) 0 |
48 |
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# endif |
49 |
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# ifndef IS_PADCONST |
50 |
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# define IS_PADCONST(v) 0 |
51 |
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# endif |
52 |
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#endif |
53 |
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54 |
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/* 5.11 */ |
55 |
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#ifndef CxHASARGS |
56 |
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# define CxHASARGS(cx) (cx)->blk_sub.hasargs |
57 |
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#endif |
58 |
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59 |
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/* 5.10.0 */ |
60 |
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#ifndef SvREFCNT_inc_NN |
61 |
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# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv) |
62 |
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#endif |
63 |
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64 |
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/* 5.8.8 */ |
65 |
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#ifndef GV_NOTQUAL |
66 |
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# define GV_NOTQUAL 0 |
67 |
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#endif |
68 |
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#ifndef newSV |
69 |
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# define newSV(l) NEWSV(0,l) |
70 |
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#endif |
71 |
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#ifndef CvISXSUB_on |
72 |
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# define CvISXSUB_on(cv) (void)cv |
73 |
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#endif |
74 |
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#ifndef CvISXSUB |
75 |
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# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE) |
76 |
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#endif |
77 |
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#ifndef Newx |
78 |
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# define Newx(ptr,nitems,type) New (0,ptr,nitems,type) |
79 |
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#endif |
80 |
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81 |
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/* 5.8.7 */ |
82 |
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#ifndef SvRV_set |
83 |
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# define SvRV_set(s,v) SvRV(s) = (v) |
84 |
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#endif |
85 |
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86 |
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static int |
87 |
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s_signum (SV *sig) |
88 |
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{ |
89 |
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#ifndef SIG_SIZE |
90 |
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/* kudos to Slaven Rezic for the idea */ |
91 |
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static char sig_size [] = { SIG_NUM }; |
92 |
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# define SIG_SIZE (sizeof (sig_size) + 1) |
93 |
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#endif |
94 |
root |
1.5 |
dTHX; |
95 |
root |
1.1 |
int signum; |
96 |
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97 |
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SvGETMAGIC (sig); |
98 |
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99 |
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for (signum = 1; signum < SIG_SIZE; ++signum) |
100 |
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if (strEQ (SvPV_nolen (sig), PL_sig_name [signum])) |
101 |
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return signum; |
102 |
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103 |
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signum = SvIV (sig); |
104 |
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105 |
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if (signum > 0 && signum < SIG_SIZE) |
106 |
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return signum; |
107 |
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108 |
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return -1; |
109 |
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} |
110 |
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111 |
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static int |
112 |
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s_signum_croak (SV *sig) |
113 |
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{ |
114 |
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int signum = s_signum (sig); |
115 |
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116 |
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if (signum < 0) |
117 |
root |
1.5 |
{ |
118 |
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dTHX; |
119 |
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croak ("%s: invalid signal name or number", SvPV_nolen (sig)); |
120 |
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} |
121 |
root |
1.1 |
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122 |
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return signum; |
123 |
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} |
124 |
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125 |
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static int |
126 |
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s_fileno (SV *fh, int wr) |
127 |
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{ |
128 |
root |
1.5 |
dTHX; |
129 |
root |
1.1 |
SvGETMAGIC (fh); |
130 |
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131 |
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if (SvROK (fh)) |
132 |
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{ |
133 |
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fh = SvRV (fh); |
134 |
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SvGETMAGIC (fh); |
135 |
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} |
136 |
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137 |
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if (SvTYPE (fh) == SVt_PVGV) |
138 |
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return PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh))); |
139 |
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140 |
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if (SvOK (fh) && (SvIV (fh) >= 0) && (SvIV (fh) < 0x7fffffffL)) |
141 |
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return SvIV (fh); |
142 |
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143 |
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return -1; |
144 |
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} |
145 |
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146 |
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static int |
147 |
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s_fileno_croak (SV *fh, int wr) |
148 |
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{ |
149 |
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int fd = s_fileno (fh, wr); |
150 |
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151 |
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if (fd < 0) |
152 |
root |
1.5 |
{ |
153 |
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dTHX; |
154 |
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croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh)); |
155 |
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} |
156 |
root |
1.1 |
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157 |
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return fd; |
158 |
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} |
159 |
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160 |
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static SV * |
161 |
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s_get_cv (SV *cb_sv) |
162 |
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{ |
163 |
root |
1.5 |
dTHX; |
164 |
root |
1.1 |
HV *st; |
165 |
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GV *gvp; |
166 |
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167 |
root |
1.4 |
return (SV *)sv_2cv (cb_sv, &st, &gvp, 0); |
168 |
root |
1.1 |
} |
169 |
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170 |
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static SV * |
171 |
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s_get_cv_croak (SV *cb_sv) |
172 |
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{ |
173 |
root |
1.3 |
SV *cv = s_get_cv (cb_sv); |
174 |
root |
1.1 |
|
175 |
root |
1.3 |
if (!cv) |
176 |
root |
1.5 |
{ |
177 |
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dTHX; |
178 |
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croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv)); |
179 |
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} |
180 |
root |
1.1 |
|
181 |
root |
1.3 |
return cv; |
182 |
root |
1.1 |
} |
183 |
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184 |
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/*****************************************************************************/ |
185 |
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/* gensub: simple closure generation utility */ |
186 |
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187 |
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#define S_GENSUB_ARG CvXSUBANY (cv).any_ptr |
188 |
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189 |
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/* create a closure from XS, returns a code reference */ |
190 |
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/* the arg can be accessed via GENSUB_ARG from the callback */ |
191 |
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/* the callback must use dXSARGS/XSRETURN */ |
192 |
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static SV * |
193 |
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s_gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) |
194 |
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{ |
195 |
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CV *cv = (CV *)newSV (0); |
196 |
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197 |
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sv_upgrade ((SV *)cv, SVt_PVCV); |
198 |
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199 |
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CvANON_on (cv); |
200 |
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CvISXSUB_on (cv); |
201 |
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CvXSUB (cv) = xsub; |
202 |
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S_GENSUB_ARG = arg; |
203 |
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204 |
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return newRV_noinc ((SV *)cv); |
205 |
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} |
206 |
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207 |
root |
1.6 |
/*****************************************************************************/ |
208 |
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/* portable pipe/socketpair */ |
209 |
root |
1.5 |
|
210 |
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#ifdef USE_SOCKETS_AS_HANDLES |
211 |
root |
1.6 |
# define S_TO_HANDLE(x) ((HANDLE)win32_get_osfhandle (x)) |
212 |
root |
1.5 |
#else |
213 |
root |
1.6 |
# define S_TO_HANDLE(x) ((HANDLE)x) |
214 |
root |
1.5 |
#endif |
215 |
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216 |
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#ifdef _WIN32 |
217 |
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/* taken almost verbatim from libev's ev_win32.c */ |
218 |
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/* oh, the humanity! */ |
219 |
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static int |
220 |
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s_pipe (int filedes [2]) |
221 |
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{ |
222 |
root |
1.7 |
dTHX; |
223 |
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224 |
root |
1.5 |
struct sockaddr_in addr = { 0 }; |
225 |
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int addr_size = sizeof (addr); |
226 |
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struct sockaddr_in adr2; |
227 |
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int adr2_size = sizeof (adr2); |
228 |
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SOCKET listener; |
229 |
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SOCKET sock [2] = { -1, -1 }; |
230 |
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231 |
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if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
232 |
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return -1; |
233 |
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234 |
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addr.sin_family = AF_INET; |
235 |
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addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
236 |
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addr.sin_port = 0; |
237 |
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238 |
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if (bind (listener, (struct sockaddr *)&addr, addr_size)) |
239 |
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goto fail; |
240 |
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241 |
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if (getsockname (listener, (struct sockaddr *)&addr, &addr_size)) |
242 |
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goto fail; |
243 |
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244 |
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if (listen (listener, 1)) |
245 |
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goto fail; |
246 |
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247 |
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if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
248 |
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goto fail; |
249 |
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250 |
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if (connect (sock [0], (struct sockaddr *)&addr, addr_size)) |
251 |
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goto fail; |
252 |
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253 |
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if ((sock [1] = accept (listener, 0, 0)) < 0) |
254 |
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goto fail; |
255 |
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256 |
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/* windows vista returns fantasy port numbers for getpeername. |
257 |
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* example for two interconnected tcp sockets: |
258 |
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* |
259 |
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* (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364 |
260 |
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* (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363 |
261 |
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* (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363 |
262 |
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* (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365 |
263 |
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* |
264 |
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* wow! tridirectional sockets! |
265 |
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* |
266 |
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* this way of checking ports seems to work: |
267 |
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*/ |
268 |
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if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size)) |
269 |
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goto fail; |
270 |
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271 |
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if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size)) |
272 |
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goto fail; |
273 |
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274 |
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errno = WSAEINVAL; |
275 |
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if (addr_size != adr2_size |
276 |
|
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|| addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */ |
277 |
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|| addr.sin_port != adr2.sin_port) |
278 |
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goto fail; |
279 |
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280 |
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closesocket (listener); |
281 |
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282 |
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#ifdef USE_SOCKETS_AS_HANDLES |
283 |
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/* when select isn't winsocket, we also expect socket, connect, accept etc. |
284 |
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* to work on fds */ |
285 |
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filedes [0] = sock [0]; |
286 |
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filedes [1] = sock [1]; |
287 |
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#else |
288 |
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filedes [0] = _open_osfhandle (sock [0], 0); |
289 |
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filedes [1] = _open_osfhandle (sock [1], 0); |
290 |
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#endif |
291 |
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292 |
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return 0; |
293 |
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294 |
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fail: |
295 |
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closesocket (listener); |
296 |
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297 |
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if (sock [0] != INVALID_SOCKET) closesocket (sock [0]); |
298 |
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if (sock [1] != INVALID_SOCKET) closesocket (sock [1]); |
299 |
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300 |
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return -1; |
301 |
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} |
302 |
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303 |
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#define s_socketpair(domain,type,protocol,filedes) s_pipe (filedes) |
304 |
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|
305 |
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static int |
306 |
|
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s_fd_blocking (int fd, int blocking) |
307 |
|
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{ |
308 |
root |
1.6 |
u_long nonblocking = !blocking; |
309 |
root |
1.5 |
|
310 |
root |
1.6 |
return ioctlsocket ((SOCKET)S_TO_HANDLE (fd), FIONBIO, &nonblocking); |
311 |
root |
1.5 |
} |
312 |
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313 |
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#define s_fd_prepare(fd) s_fd_blocking (fd, 0) |
314 |
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315 |
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#else |
316 |
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317 |
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#define s_socketpair(domain,type,protocol,filedes) socketpair (domain, type, protocol, filedes) |
318 |
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#define s_pipe(filedes) pipe (filedes) |
319 |
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320 |
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static int |
321 |
|
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s_fd_blocking (int fd, int blocking) |
322 |
|
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{ |
323 |
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return fcntl (fd, F_SETFL, blocking ? 0 : O_NONBLOCK); |
324 |
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} |
325 |
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326 |
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static int |
327 |
|
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s_fd_prepare (int fd) |
328 |
|
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{ |
329 |
|
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return s_fd_blocking (fd, 0) |
330 |
|
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|| fcntl (fd, F_SETFD, FD_CLOEXEC); |
331 |
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} |
332 |
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333 |
|
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#endif |
334 |
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335 |
|
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#if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
336 |
root |
1.11 |
# define SCHMORP_H_HAVE_EVENTFD 1 |
337 |
root |
1.5 |
/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
338 |
|
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# include <stdint.h> |
339 |
|
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# ifdef __cplusplus |
340 |
|
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extern "C" { |
341 |
|
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# endif |
342 |
|
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int eventfd (unsigned int initval, int flags); |
343 |
|
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# ifdef __cplusplus |
344 |
|
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} |
345 |
|
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# endif |
346 |
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#else |
347 |
|
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# define eventfd(initval,flags) -1 |
348 |
|
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#endif |
349 |
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|
350 |
|
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typedef struct { |
351 |
|
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int fd[2]; /* read, write fd, might be equal */ |
352 |
|
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int len; /* write length (1 pipe/socket, 8 eventfd) */ |
353 |
|
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} s_epipe; |
354 |
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|
355 |
|
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static int |
356 |
|
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s_epipe_new (s_epipe *epp) |
357 |
|
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{ |
358 |
|
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s_epipe ep; |
359 |
|
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|
360 |
|
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ep.fd [0] = ep.fd [1] = eventfd (0, 0); |
361 |
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|
362 |
|
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if (ep.fd [0] >= 0) |
363 |
|
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{ |
364 |
|
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s_fd_prepare (ep.fd [0]); |
365 |
|
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ep.len = 8; |
366 |
|
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} |
367 |
|
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else |
368 |
|
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{ |
369 |
|
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if (s_pipe (ep.fd)) |
370 |
|
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return -1; |
371 |
|
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|
372 |
|
|
if (s_fd_prepare (ep.fd [0]) |
373 |
|
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|| s_fd_prepare (ep.fd [1])) |
374 |
|
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{ |
375 |
root |
1.7 |
dTHX; |
376 |
|
|
|
377 |
root |
1.5 |
close (ep.fd [0]); |
378 |
|
|
close (ep.fd [1]); |
379 |
|
|
return -1; |
380 |
|
|
} |
381 |
|
|
|
382 |
|
|
ep.len = 1; |
383 |
|
|
} |
384 |
|
|
|
385 |
|
|
*epp = ep; |
386 |
|
|
return 0; |
387 |
|
|
} |
388 |
|
|
|
389 |
|
|
static void |
390 |
|
|
s_epipe_destroy (s_epipe *epp) |
391 |
|
|
{ |
392 |
root |
1.7 |
dTHX; |
393 |
|
|
|
394 |
root |
1.5 |
close (epp->fd [0]); |
395 |
|
|
|
396 |
|
|
if (epp->fd [1] != epp->fd [0]) |
397 |
|
|
close (epp->fd [1]); |
398 |
|
|
|
399 |
|
|
epp->len = 0; |
400 |
|
|
} |
401 |
|
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|
402 |
|
|
static void |
403 |
|
|
s_epipe_signal (s_epipe *epp) |
404 |
|
|
{ |
405 |
|
|
#ifdef _WIN32 |
406 |
root |
1.7 |
/* perl overrides send with a function that crashes in other threads. |
407 |
|
|
* unfortunately, it overrides it with an argument-less macro, so |
408 |
|
|
* there is no way to force usage of the real send function. |
409 |
|
|
* incompetent windows programmers - is this redundant? |
410 |
|
|
*/ |
411 |
|
|
DWORD dummy; |
412 |
|
|
WriteFile (S_TO_HANDLE (epp->fd [1]), (LPCVOID)&dummy, 1, &dummy, 0); |
413 |
root |
1.5 |
#else |
414 |
root |
1.11 |
# if SCHMORP_H_HAVE_EVENTFD |
415 |
root |
1.7 |
static uint64_t counter = 1; |
416 |
root |
1.11 |
# else |
417 |
|
|
static char counter [8]; |
418 |
|
|
# endif |
419 |
root |
1.7 |
/* some modules accept fd's from outside, support eventfd here */ |
420 |
|
|
if (write (epp->fd [1], &counter, epp->len) < 0 |
421 |
|
|
&& errno == EINVAL |
422 |
|
|
&& epp->len != 8) |
423 |
|
|
write (epp->fd [1], &counter, (epp->len = 8)); |
424 |
root |
1.5 |
#endif |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
static void |
428 |
|
|
s_epipe_drain (s_epipe *epp) |
429 |
|
|
{ |
430 |
root |
1.7 |
dTHX; |
431 |
root |
1.5 |
char buf [9]; |
432 |
|
|
|
433 |
|
|
#ifdef _WIN32 |
434 |
root |
1.6 |
recv (epp->fd [0], buf, sizeof (buf), 0); |
435 |
root |
1.5 |
#else |
436 |
|
|
read (epp->fd [0], buf, sizeof (buf)); |
437 |
|
|
#endif |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
/* like new, but dups over old */ |
441 |
|
|
static int |
442 |
|
|
s_epipe_renew (s_epipe *epp) |
443 |
|
|
{ |
444 |
root |
1.7 |
dTHX; |
445 |
root |
1.5 |
s_epipe epn; |
446 |
|
|
|
447 |
|
|
if (epp->fd [1] != epp->fd [0]) |
448 |
|
|
close (epp->fd [1]); |
449 |
|
|
|
450 |
|
|
if (s_epipe_new (&epn)) |
451 |
|
|
return -1; |
452 |
|
|
|
453 |
|
|
if (epp->len) |
454 |
|
|
{ |
455 |
root |
1.6 |
if (dup2 (epn.fd [0], epp->fd [0]) < 0) |
456 |
root |
1.5 |
croak ("unable to dup over old event pipe"); /* should not croak */ |
457 |
|
|
|
458 |
root |
1.10 |
close (epn.fd [0]); |
459 |
|
|
|
460 |
|
|
if (epn.fd [0] == epn.fd [1]) |
461 |
|
|
epn.fd [1] = epp->fd [0]; |
462 |
root |
1.5 |
|
463 |
|
|
epn.fd [0] = epp->fd [0]; |
464 |
|
|
} |
465 |
|
|
|
466 |
|
|
*epp = epn; |
467 |
|
|
|
468 |
|
|
return 0; |
469 |
|
|
} |
470 |
|
|
|
471 |
|
|
#define s_epipe_fd(epp) ((epp)->fd [0]) |
472 |
|
|
|
473 |
|
|
static int |
474 |
|
|
s_epipe_wait (s_epipe *epp) |
475 |
|
|
{ |
476 |
root |
1.7 |
dTHX; |
477 |
root |
1.11 |
#if SCHMORP_H_PREFER_SELECT |
478 |
root |
1.5 |
fd_set rfd; |
479 |
root |
1.6 |
int fd = s_epipe_fd (epp); |
480 |
root |
1.5 |
|
481 |
|
|
FD_ZERO (&rfd); |
482 |
root |
1.6 |
FD_SET (fd, &rfd); |
483 |
root |
1.5 |
|
484 |
root |
1.6 |
return PerlSock_select (fd + 1, &rfd, 0, 0, 0); |
485 |
root |
1.5 |
#else |
486 |
|
|
/* poll is preferable on posix systems */ |
487 |
|
|
struct pollfd pfd; |
488 |
|
|
|
489 |
|
|
pfd.fd = s_epipe_fd (epp); |
490 |
|
|
pfd.events = POLLIN; |
491 |
|
|
|
492 |
root |
1.9 |
return poll (&pfd, 1, -1); |
493 |
root |
1.5 |
#endif |
494 |
|
|
} |
495 |
|
|
|
496 |
root |
1.1 |
#endif |
497 |
|
|
|