| 1 | #ifndef SCHMORP_PERL_H_ |
1 | #ifndef SCHMORP_PERL_H_ |
| 2 | #define SCHMORP_PERL_H_ |
2 | #define SCHMORP_PERL_H_ |
| 3 | |
3 | |
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4 | /* WARNING |
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5 | * This header file is a shared resource between many modules. |
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6 | * perl header files MUST already be included. |
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7 | */ |
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8 | |
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9 | #include <signal.h> |
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10 | #include <errno.h> |
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11 | |
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12 | #if defined(WIN32 ) || defined(_MINIX) |
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13 | # define SCHMORP_H_PREFER_SELECT 1 |
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14 | #endif |
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15 | |
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16 | #if !SCHMORP_H_PREFER_SELECT |
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17 | # include <poll.h> |
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18 | #endif |
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19 | |
| 4 | /* useful stuff, used by schmorp mostly */ |
20 | /* useful stuff, used by schmorp mostly */ |
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21 | |
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22 | #include "patchlevel.h" |
| 5 | |
23 | |
| 6 | #define PERL_VERSION_ATLEAST(a,b,c) \ |
24 | #define PERL_VERSION_ATLEAST(a,b,c) \ |
| 7 | (PERL_REVISION > (a) \ |
25 | (PERL_REVISION > (a) \ |
| 8 | || (PERL_REVISION == (a) \ |
26 | || (PERL_REVISION == (a) \ |
| 9 | && (PERL_VERSION > (b) \ |
27 | && (PERL_VERSION > (b) \ |
| 10 | || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c))))) |
28 | || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c))))) |
| 11 | |
29 | |
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30 | #ifndef PERL_MAGIC_ext |
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31 | # define PERL_MAGIC_ext '~' |
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32 | #endif |
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33 | |
| 12 | #if !PERL_VERSION_ATLEAST (5,6,0) |
34 | #if !PERL_VERSION_ATLEAST (5,6,0) |
| 13 | # ifndef PL_ppaddr |
35 | # ifndef PL_ppaddr |
| 14 | # define PL_ppaddr ppaddr |
36 | # define PL_ppaddr ppaddr |
| 15 | # endif |
37 | # endif |
| 16 | # ifndef call_sv |
38 | # ifndef call_sv |
| … | |
… | |
| 27 | # endif |
49 | # endif |
| 28 | # ifndef IS_PADCONST |
50 | # ifndef IS_PADCONST |
| 29 | # define IS_PADCONST(v) 0 |
51 | # define IS_PADCONST(v) 0 |
| 30 | # endif |
52 | # endif |
| 31 | #endif |
53 | #endif |
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54 | |
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55 | /* use NV for 32 bit perls as it allows larger offsets */ |
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56 | #if IVSIZE >= 8 |
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57 | typedef IV VAL64; |
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58 | # define SvVAL64(sv) SvIV (sv) |
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59 | # define newSVval64(i64) newSViv (i64) |
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60 | #else |
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61 | typedef NV VAL64; |
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62 | # define SvVAL64(sv) SvNV (sv) |
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63 | # define newSVval64(i64) newSVnv (i64) |
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64 | #endif |
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65 | |
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66 | /* typemap for the above */ |
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67 | /* |
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68 | VAL64 T_VAL64 |
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69 | |
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70 | INPUT |
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71 | |
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72 | T_VAL64 |
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73 | $var = ($type)SvVAL64 ($arg); |
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74 | |
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75 | OUTPUT |
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76 | |
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77 | T_VAL64 |
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78 | $arg = newSVval64 ($var); |
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79 | */ |
| 32 | |
80 | |
| 33 | /* 5.11 */ |
81 | /* 5.11 */ |
| 34 | #ifndef CxHASARGS |
82 | #ifndef CxHASARGS |
| 35 | # define CxHASARGS(cx) (cx)->blk_sub.hasargs |
83 | # define CxHASARGS(cx) (cx)->blk_sub.hasargs |
| 36 | #endif |
84 | #endif |
| … | |
… | |
| 68 | #ifndef SIG_SIZE |
116 | #ifndef SIG_SIZE |
| 69 | /* kudos to Slaven Rezic for the idea */ |
117 | /* kudos to Slaven Rezic for the idea */ |
| 70 | static char sig_size [] = { SIG_NUM }; |
118 | static char sig_size [] = { SIG_NUM }; |
| 71 | # define SIG_SIZE (sizeof (sig_size) + 1) |
119 | # define SIG_SIZE (sizeof (sig_size) + 1) |
| 72 | #endif |
120 | #endif |
|
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121 | dTHX; |
| 73 | int signum; |
122 | int signum; |
| 74 | |
123 | |
| 75 | SvGETMAGIC (sig); |
124 | SvGETMAGIC (sig); |
| 76 | |
125 | |
| 77 | for (signum = 1; signum < SIG_SIZE; ++signum) |
126 | for (signum = 1; signum < SIG_SIZE; ++signum) |
| … | |
… | |
| 90 | s_signum_croak (SV *sig) |
139 | s_signum_croak (SV *sig) |
| 91 | { |
140 | { |
| 92 | int signum = s_signum (sig); |
141 | int signum = s_signum (sig); |
| 93 | |
142 | |
| 94 | if (signum < 0) |
143 | if (signum < 0) |
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144 | { |
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145 | dTHX; |
| 95 | croak ("%s: invalid signal name or number", SvPV_nolen (sig)); |
146 | croak ("%s: invalid signal name or number", SvPV_nolen (sig)); |
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147 | } |
| 96 | |
148 | |
| 97 | return signum; |
149 | return signum; |
| 98 | } |
150 | } |
| 99 | |
151 | |
| 100 | static int |
152 | static int |
| 101 | s_fileno (SV *fh, int wr) |
153 | s_fileno (SV *fh, int wr) |
| 102 | { |
154 | { |
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155 | dTHX; |
| 103 | SvGETMAGIC (fh); |
156 | SvGETMAGIC (fh); |
| 104 | |
157 | |
| 105 | if (SvROK (fh)) |
158 | if (SvROK (fh)) |
| 106 | { |
159 | { |
| 107 | fh = SvRV (fh); |
160 | fh = SvRV (fh); |
| … | |
… | |
| 121 | s_fileno_croak (SV *fh, int wr) |
174 | s_fileno_croak (SV *fh, int wr) |
| 122 | { |
175 | { |
| 123 | int fd = s_fileno (fh, wr); |
176 | int fd = s_fileno (fh, wr); |
| 124 | |
177 | |
| 125 | if (fd < 0) |
178 | if (fd < 0) |
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179 | { |
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180 | dTHX; |
| 126 | croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh)); |
181 | croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh)); |
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182 | } |
| 127 | |
183 | |
| 128 | return fd; |
184 | return fd; |
| 129 | } |
185 | } |
| 130 | |
186 | |
| 131 | static SV * |
187 | static SV * |
| 132 | s_get_cv (SV *cb_sv) |
188 | s_get_cv (SV *cb_sv) |
| 133 | { |
189 | { |
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190 | dTHX; |
| 134 | HV *st; |
191 | HV *st; |
| 135 | GV *gvp; |
192 | GV *gvp; |
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193 | |
| 136 | CV *cv = sv_2cv (cb_sv, &st, &gvp, 0); |
194 | return (SV *)sv_2cv (cb_sv, &st, &gvp, 0); |
| 137 | |
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| 138 | return (SV *)cv; |
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| 139 | } |
195 | } |
| 140 | |
196 | |
| 141 | static SV * |
197 | static SV * |
| 142 | s_get_cv_croak (SV *cb_sv) |
198 | s_get_cv_croak (SV *cb_sv) |
| 143 | { |
199 | { |
| 144 | cb_sv = s_get_cv (cb_sv); |
200 | SV *cv = s_get_cv (cb_sv); |
| 145 | |
201 | |
| 146 | if (!cb_sv) |
202 | if (!cv) |
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203 | { |
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204 | dTHX; |
| 147 | croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv)); |
205 | croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv)); |
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206 | } |
| 148 | |
207 | |
| 149 | return cb_sv; |
208 | return cv; |
| 150 | } |
209 | } |
| 151 | |
210 | |
| 152 | /*****************************************************************************/ |
211 | /*****************************************************************************/ |
| 153 | /* gensub: simple closure generation utility */ |
212 | /* gensub: simple closure generation utility */ |
| 154 | |
213 | |
| … | |
… | |
| 170 | S_GENSUB_ARG = arg; |
229 | S_GENSUB_ARG = arg; |
| 171 | |
230 | |
| 172 | return newRV_noinc ((SV *)cv); |
231 | return newRV_noinc ((SV *)cv); |
| 173 | } |
232 | } |
| 174 | |
233 | |
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234 | /*****************************************************************************/ |
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235 | /* portable pipe/socketpair */ |
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236 | |
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237 | #if defined(USE_SOCKETS_AS_HANDLES) || PERL_VERSION_ATLEAST(5,18,0) |
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238 | # define S_TO_HANDLE(x) ((HANDLE)win32_get_osfhandle (x)) |
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239 | #else |
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240 | # define S_TO_HANDLE(x) ((HANDLE)x) |
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241 | #endif |
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242 | |
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243 | #ifdef _WIN32 |
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244 | /* taken almost verbatim from libev's ev_win32.c */ |
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245 | /* oh, the humanity! */ |
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246 | static int |
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247 | s_pipe (int filedes [2]) |
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248 | { |
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249 | dTHX; |
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250 | |
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251 | struct sockaddr_in addr = { 0 }; |
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252 | int addr_size = sizeof (addr); |
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253 | struct sockaddr_in adr2; |
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254 | int adr2_size = sizeof (adr2); |
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255 | SOCKET listener; |
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256 | SOCKET sock [2] = { -1, -1 }; |
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257 | |
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258 | if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
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259 | return -1; |
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260 | |
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261 | addr.sin_family = AF_INET; |
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262 | addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
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263 | addr.sin_port = 0; |
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264 | |
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265 | if (bind (listener, (struct sockaddr *)&addr, addr_size)) |
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266 | goto fail; |
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267 | |
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268 | if (getsockname (listener, (struct sockaddr *)&addr, &addr_size)) |
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269 | goto fail; |
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270 | |
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271 | if (listen (listener, 1)) |
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272 | goto fail; |
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273 | |
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274 | if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
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275 | goto fail; |
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276 | |
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277 | if (connect (sock [0], (struct sockaddr *)&addr, addr_size)) |
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278 | goto fail; |
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279 | |
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280 | if ((sock [1] = accept (listener, 0, 0)) < 0) |
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281 | goto fail; |
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282 | |
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283 | /* windows vista returns fantasy port numbers for getpeername. |
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284 | * example for two interconnected tcp sockets: |
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285 | * |
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286 | * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364 |
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287 | * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363 |
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288 | * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363 |
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289 | * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365 |
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290 | * |
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291 | * wow! tridirectional sockets! |
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292 | * |
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293 | * this way of checking ports seems to work: |
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294 | */ |
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295 | if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size)) |
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296 | goto fail; |
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297 | |
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298 | if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size)) |
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299 | goto fail; |
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300 | |
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301 | errno = WSAEINVAL; |
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302 | if (addr_size != adr2_size |
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303 | || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */ |
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304 | || addr.sin_port != adr2.sin_port) |
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305 | goto fail; |
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306 | |
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307 | closesocket (listener); |
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308 | |
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309 | #ifdef USE_SOCKETS_AS_HANDLES |
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310 | /* when select isn't winsocket, we also expect socket, connect, accept etc. |
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311 | * to work on fds */ |
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312 | filedes [0] = sock [0]; |
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313 | filedes [1] = sock [1]; |
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314 | #else |
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315 | filedes [0] = _open_osfhandle (sock [0], 0); |
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316 | filedes [1] = _open_osfhandle (sock [1], 0); |
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317 | #endif |
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318 | |
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319 | return 0; |
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320 | |
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321 | fail: |
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322 | closesocket (listener); |
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323 | |
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324 | if (sock [0] != INVALID_SOCKET) closesocket (sock [0]); |
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325 | if (sock [1] != INVALID_SOCKET) closesocket (sock [1]); |
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326 | |
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327 | return -1; |
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328 | } |
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329 | |
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330 | #define s_socketpair(domain,type,protocol,filedes) s_pipe (filedes) |
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331 | |
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332 | static int |
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333 | s_fd_blocking (int fd, int blocking) |
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334 | { |
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335 | u_long nonblocking = !blocking; |
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336 | |
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337 | return ioctlsocket ((SOCKET)S_TO_HANDLE (fd), FIONBIO, &nonblocking); |
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338 | } |
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339 | |
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340 | #define s_fd_prepare(fd) s_fd_blocking (fd, 0) |
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341 | |
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342 | #else |
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343 | |
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344 | #define s_socketpair(domain,type,protocol,filedes) socketpair (domain, type, protocol, filedes) |
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345 | #define s_pipe(filedes) pipe (filedes) |
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346 | |
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347 | static int |
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348 | s_fd_blocking (int fd, int blocking) |
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349 | { |
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350 | return fcntl (fd, F_SETFL, blocking ? 0 : O_NONBLOCK); |
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351 | } |
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352 | |
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353 | static int |
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354 | s_fd_prepare (int fd) |
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355 | { |
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356 | return s_fd_blocking (fd, 0) |
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357 | || fcntl (fd, F_SETFD, FD_CLOEXEC); |
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358 | } |
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359 | |
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360 | #endif |
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361 | |
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362 | #if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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363 | # define SCHMORP_H_HAVE_EVENTFD 1 |
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364 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
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365 | # include <stdint.h> |
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366 | # ifdef __cplusplus |
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367 | extern "C" { |
| 175 | #endif |
368 | # endif |
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369 | int eventfd (unsigned int initval, int flags); |
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370 | # ifdef __cplusplus |
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371 | } |
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372 | # endif |
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373 | #else |
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374 | # define eventfd(initval,flags) -1 |
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375 | #endif |
| 176 | |
376 | |
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377 | typedef struct { |
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378 | int fd[2]; /* read, write fd, might be equal */ |
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379 | int len; /* write length (1 pipe/socket, 8 eventfd) */ |
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380 | } s_epipe; |
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381 | |
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382 | static int |
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383 | s_epipe_new (s_epipe *epp) |
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384 | { |
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385 | s_epipe ep; |
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386 | |
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387 | ep.fd [0] = ep.fd [1] = eventfd (0, 0); |
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388 | |
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389 | if (ep.fd [0] >= 0) |
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390 | { |
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391 | s_fd_prepare (ep.fd [0]); |
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392 | ep.len = 8; |
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393 | } |
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394 | else |
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395 | { |
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396 | if (s_pipe (ep.fd)) |
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397 | return -1; |
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398 | |
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399 | if (s_fd_prepare (ep.fd [0]) |
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400 | || s_fd_prepare (ep.fd [1])) |
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401 | { |
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402 | dTHX; |
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403 | |
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404 | close (ep.fd [0]); |
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405 | close (ep.fd [1]); |
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406 | return -1; |
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407 | } |
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408 | |
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409 | ep.len = 1; |
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410 | } |
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411 | |
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412 | *epp = ep; |
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413 | return 0; |
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414 | } |
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415 | |
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416 | static void |
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417 | s_epipe_destroy (s_epipe *epp) |
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418 | { |
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419 | dTHX; |
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420 | |
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421 | close (epp->fd [0]); |
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422 | |
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423 | if (epp->fd [1] != epp->fd [0]) |
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424 | close (epp->fd [1]); |
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425 | |
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426 | epp->len = 0; |
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427 | } |
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428 | |
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429 | static void |
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430 | s_epipe_signal (s_epipe *epp) |
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431 | { |
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432 | #ifdef _WIN32 |
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433 | /* perl overrides send with a function that crashes in other threads. |
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434 | * unfortunately, it overrides it with an argument-less macro, so |
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435 | * there is no way to force usage of the real send function. |
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436 | * incompetent windows programmers - is this redundant? |
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437 | */ |
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438 | DWORD dummy; |
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439 | WriteFile (S_TO_HANDLE (epp->fd [1]), (LPCVOID)&dummy, 1, &dummy, 0); |
|
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440 | #else |
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441 | # if SCHMORP_H_HAVE_EVENTFD |
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442 | static uint64_t counter = 1; |
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443 | # else |
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444 | static char counter [8]; |
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445 | # endif |
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446 | /* some modules accept fd's from outside, support eventfd here */ |
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447 | if (write (epp->fd [1], &counter, epp->len) < 0 |
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448 | && errno == EINVAL |
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449 | && epp->len != 8) |
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450 | write (epp->fd [1], &counter, (epp->len = 8)); |
|
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451 | #endif |
|
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452 | } |
|
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453 | |
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454 | static void |
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455 | s_epipe_drain (s_epipe *epp) |
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456 | { |
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457 | dTHX; |
|
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458 | char buf [9]; |
|
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459 | |
|
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460 | #ifdef _WIN32 |
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461 | recv (epp->fd [0], buf, sizeof (buf), 0); |
|
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462 | #else |
|
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463 | read (epp->fd [0], buf, sizeof (buf)); |
|
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464 | #endif |
|
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465 | } |
|
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466 | |
|
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467 | /* like new, but dups over old */ |
|
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468 | static int |
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469 | s_epipe_renew (s_epipe *epp) |
|
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470 | { |
|
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471 | dTHX; |
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472 | s_epipe epn; |
|
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473 | |
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474 | if (epp->fd [1] != epp->fd [0]) |
|
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475 | close (epp->fd [1]); |
|
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476 | |
|
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477 | if (s_epipe_new (&epn)) |
|
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478 | return -1; |
|
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479 | |
|
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480 | if (epp->len) |
|
|
481 | { |
|
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482 | if (dup2 (epn.fd [0], epp->fd [0]) < 0) |
|
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483 | croak ("unable to dup over old event pipe"); /* should not croak */ |
|
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484 | |
|
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485 | close (epn.fd [0]); |
|
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486 | |
|
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487 | if (epn.fd [0] == epn.fd [1]) |
|
|
488 | epn.fd [1] = epp->fd [0]; |
|
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489 | |
|
|
490 | epn.fd [0] = epp->fd [0]; |
|
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491 | } |
|
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492 | |
|
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493 | *epp = epn; |
|
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494 | |
|
|
495 | return 0; |
|
|
496 | } |
|
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497 | |
|
|
498 | #define s_epipe_fd(epp) ((epp)->fd [0]) |
|
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499 | |
|
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500 | static int |
|
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501 | s_epipe_wait (s_epipe *epp) |
|
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502 | { |
|
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503 | dTHX; |
|
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504 | #if SCHMORP_H_PREFER_SELECT |
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505 | fd_set rfd; |
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506 | int fd = s_epipe_fd (epp); |
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507 | |
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508 | FD_ZERO (&rfd); |
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509 | FD_SET (fd, &rfd); |
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510 | |
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511 | return PerlSock_select (fd + 1, &rfd, 0, 0, 0); |
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512 | #else |
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513 | /* poll is preferable on posix systems */ |
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514 | struct pollfd pfd; |
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515 | |
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516 | pfd.fd = s_epipe_fd (epp); |
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517 | pfd.events = POLLIN; |
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518 | |
|
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519 | return poll (&pfd, 1, -1); |
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520 | #endif |
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521 | } |
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522 | |
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523 | #endif |
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524 | |
