| 1 |
#ifndef SCHMORP_PERL_H_ |
| 2 |
#define SCHMORP_PERL_H_ |
| 3 |
|
| 4 |
/* WARNING |
| 5 |
* This header file is a shared resource between many modules. |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <signal.h> |
| 9 |
#include <errno.h> |
| 10 |
|
| 11 |
#if defined(WIN32 ) || defined(_MINIX) |
| 12 |
# define SCHMORP_H_PREFER_SELECT 1 |
| 13 |
#endif |
| 14 |
|
| 15 |
#if !SCHMORP_H_PREFER_SELECT |
| 16 |
# include <poll.h> |
| 17 |
#endif |
| 18 |
|
| 19 |
/* useful stuff, used by schmorp mostly */ |
| 20 |
|
| 21 |
#include "patchlevel.h" |
| 22 |
|
| 23 |
#define PERL_VERSION_ATLEAST(a,b,c) \ |
| 24 |
(PERL_REVISION > (a) \ |
| 25 |
|| (PERL_REVISION == (a) \ |
| 26 |
&& (PERL_VERSION > (b) \ |
| 27 |
|| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c))))) |
| 28 |
|
| 29 |
#ifndef PERL_MAGIC_ext |
| 30 |
# define PERL_MAGIC_ext '~' |
| 31 |
#endif |
| 32 |
|
| 33 |
#if !PERL_VERSION_ATLEAST (5,6,0) |
| 34 |
# ifndef PL_ppaddr |
| 35 |
# define PL_ppaddr ppaddr |
| 36 |
# endif |
| 37 |
# ifndef call_sv |
| 38 |
# define call_sv perl_call_sv |
| 39 |
# endif |
| 40 |
# ifndef get_sv |
| 41 |
# define get_sv perl_get_sv |
| 42 |
# endif |
| 43 |
# ifndef get_cv |
| 44 |
# define get_cv perl_get_cv |
| 45 |
# endif |
| 46 |
# ifndef IS_PADGV |
| 47 |
# define IS_PADGV(v) 0 |
| 48 |
# endif |
| 49 |
# ifndef IS_PADCONST |
| 50 |
# define IS_PADCONST(v) 0 |
| 51 |
# endif |
| 52 |
#endif |
| 53 |
|
| 54 |
/* 5.11 */ |
| 55 |
#ifndef CxHASARGS |
| 56 |
# define CxHASARGS(cx) (cx)->blk_sub.hasargs |
| 57 |
#endif |
| 58 |
|
| 59 |
/* 5.10.0 */ |
| 60 |
#ifndef SvREFCNT_inc_NN |
| 61 |
# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv) |
| 62 |
#endif |
| 63 |
|
| 64 |
/* 5.8.8 */ |
| 65 |
#ifndef GV_NOTQUAL |
| 66 |
# define GV_NOTQUAL 0 |
| 67 |
#endif |
| 68 |
#ifndef newSV |
| 69 |
# define newSV(l) NEWSV(0,l) |
| 70 |
#endif |
| 71 |
#ifndef CvISXSUB_on |
| 72 |
# define CvISXSUB_on(cv) (void)cv |
| 73 |
#endif |
| 74 |
#ifndef CvISXSUB |
| 75 |
# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE) |
| 76 |
#endif |
| 77 |
#ifndef Newx |
| 78 |
# define Newx(ptr,nitems,type) New (0,ptr,nitems,type) |
| 79 |
#endif |
| 80 |
|
| 81 |
/* 5.8.7 */ |
| 82 |
#ifndef SvRV_set |
| 83 |
# define SvRV_set(s,v) SvRV(s) = (v) |
| 84 |
#endif |
| 85 |
|
| 86 |
static int |
| 87 |
s_signum (SV *sig) |
| 88 |
{ |
| 89 |
#ifndef SIG_SIZE |
| 90 |
/* kudos to Slaven Rezic for the idea */ |
| 91 |
static char sig_size [] = { SIG_NUM }; |
| 92 |
# define SIG_SIZE (sizeof (sig_size) + 1) |
| 93 |
#endif |
| 94 |
dTHX; |
| 95 |
int signum; |
| 96 |
|
| 97 |
SvGETMAGIC (sig); |
| 98 |
|
| 99 |
for (signum = 1; signum < SIG_SIZE; ++signum) |
| 100 |
if (strEQ (SvPV_nolen (sig), PL_sig_name [signum])) |
| 101 |
return signum; |
| 102 |
|
| 103 |
signum = SvIV (sig); |
| 104 |
|
| 105 |
if (signum > 0 && signum < SIG_SIZE) |
| 106 |
return signum; |
| 107 |
|
| 108 |
return -1; |
| 109 |
} |
| 110 |
|
| 111 |
static int |
| 112 |
s_signum_croak (SV *sig) |
| 113 |
{ |
| 114 |
int signum = s_signum (sig); |
| 115 |
|
| 116 |
if (signum < 0) |
| 117 |
{ |
| 118 |
dTHX; |
| 119 |
croak ("%s: invalid signal name or number", SvPV_nolen (sig)); |
| 120 |
} |
| 121 |
|
| 122 |
return signum; |
| 123 |
} |
| 124 |
|
| 125 |
static int |
| 126 |
s_fileno (SV *fh, int wr) |
| 127 |
{ |
| 128 |
dTHX; |
| 129 |
SvGETMAGIC (fh); |
| 130 |
|
| 131 |
if (SvROK (fh)) |
| 132 |
{ |
| 133 |
fh = SvRV (fh); |
| 134 |
SvGETMAGIC (fh); |
| 135 |
} |
| 136 |
|
| 137 |
if (SvTYPE (fh) == SVt_PVGV) |
| 138 |
return PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh))); |
| 139 |
|
| 140 |
if (SvOK (fh) && (SvIV (fh) >= 0) && (SvIV (fh) < 0x7fffffffL)) |
| 141 |
return SvIV (fh); |
| 142 |
|
| 143 |
return -1; |
| 144 |
} |
| 145 |
|
| 146 |
static int |
| 147 |
s_fileno_croak (SV *fh, int wr) |
| 148 |
{ |
| 149 |
int fd = s_fileno (fh, wr); |
| 150 |
|
| 151 |
if (fd < 0) |
| 152 |
{ |
| 153 |
dTHX; |
| 154 |
croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh)); |
| 155 |
} |
| 156 |
|
| 157 |
return fd; |
| 158 |
} |
| 159 |
|
| 160 |
static SV * |
| 161 |
s_get_cv (SV *cb_sv) |
| 162 |
{ |
| 163 |
dTHX; |
| 164 |
HV *st; |
| 165 |
GV *gvp; |
| 166 |
|
| 167 |
return (SV *)sv_2cv (cb_sv, &st, &gvp, 0); |
| 168 |
} |
| 169 |
|
| 170 |
static SV * |
| 171 |
s_get_cv_croak (SV *cb_sv) |
| 172 |
{ |
| 173 |
SV *cv = s_get_cv (cb_sv); |
| 174 |
|
| 175 |
if (!cv) |
| 176 |
{ |
| 177 |
dTHX; |
| 178 |
croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv)); |
| 179 |
} |
| 180 |
|
| 181 |
return cv; |
| 182 |
} |
| 183 |
|
| 184 |
/*****************************************************************************/ |
| 185 |
/* gensub: simple closure generation utility */ |
| 186 |
|
| 187 |
#define S_GENSUB_ARG CvXSUBANY (cv).any_ptr |
| 188 |
|
| 189 |
/* create a closure from XS, returns a code reference */ |
| 190 |
/* the arg can be accessed via GENSUB_ARG from the callback */ |
| 191 |
/* the callback must use dXSARGS/XSRETURN */ |
| 192 |
static SV * |
| 193 |
s_gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg) |
| 194 |
{ |
| 195 |
CV *cv = (CV *)newSV (0); |
| 196 |
|
| 197 |
sv_upgrade ((SV *)cv, SVt_PVCV); |
| 198 |
|
| 199 |
CvANON_on (cv); |
| 200 |
CvISXSUB_on (cv); |
| 201 |
CvXSUB (cv) = xsub; |
| 202 |
S_GENSUB_ARG = arg; |
| 203 |
|
| 204 |
return newRV_noinc ((SV *)cv); |
| 205 |
} |
| 206 |
|
| 207 |
/*****************************************************************************/ |
| 208 |
/* portable pipe/socketpair */ |
| 209 |
|
| 210 |
#ifdef USE_SOCKETS_AS_HANDLES |
| 211 |
# define S_TO_HANDLE(x) ((HANDLE)win32_get_osfhandle (x)) |
| 212 |
#else |
| 213 |
# define S_TO_HANDLE(x) ((HANDLE)x) |
| 214 |
#endif |
| 215 |
|
| 216 |
#ifdef _WIN32 |
| 217 |
/* taken almost verbatim from libev's ev_win32.c */ |
| 218 |
/* oh, the humanity! */ |
| 219 |
static int |
| 220 |
s_pipe (int filedes [2]) |
| 221 |
{ |
| 222 |
dTHX; |
| 223 |
|
| 224 |
struct sockaddr_in addr = { 0 }; |
| 225 |
int addr_size = sizeof (addr); |
| 226 |
struct sockaddr_in adr2; |
| 227 |
int adr2_size = sizeof (adr2); |
| 228 |
SOCKET listener; |
| 229 |
SOCKET sock [2] = { -1, -1 }; |
| 230 |
|
| 231 |
if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
| 232 |
return -1; |
| 233 |
|
| 234 |
addr.sin_family = AF_INET; |
| 235 |
addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
| 236 |
addr.sin_port = 0; |
| 237 |
|
| 238 |
if (bind (listener, (struct sockaddr *)&addr, addr_size)) |
| 239 |
goto fail; |
| 240 |
|
| 241 |
if (getsockname (listener, (struct sockaddr *)&addr, &addr_size)) |
| 242 |
goto fail; |
| 243 |
|
| 244 |
if (listen (listener, 1)) |
| 245 |
goto fail; |
| 246 |
|
| 247 |
if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
| 248 |
goto fail; |
| 249 |
|
| 250 |
if (connect (sock [0], (struct sockaddr *)&addr, addr_size)) |
| 251 |
goto fail; |
| 252 |
|
| 253 |
if ((sock [1] = accept (listener, 0, 0)) < 0) |
| 254 |
goto fail; |
| 255 |
|
| 256 |
/* windows vista returns fantasy port numbers for getpeername. |
| 257 |
* example for two interconnected tcp sockets: |
| 258 |
* |
| 259 |
* (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364 |
| 260 |
* (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363 |
| 261 |
* (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363 |
| 262 |
* (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365 |
| 263 |
* |
| 264 |
* wow! tridirectional sockets! |
| 265 |
* |
| 266 |
* this way of checking ports seems to work: |
| 267 |
*/ |
| 268 |
if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size)) |
| 269 |
goto fail; |
| 270 |
|
| 271 |
if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size)) |
| 272 |
goto fail; |
| 273 |
|
| 274 |
errno = WSAEINVAL; |
| 275 |
if (addr_size != adr2_size |
| 276 |
|| addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */ |
| 277 |
|| addr.sin_port != adr2.sin_port) |
| 278 |
goto fail; |
| 279 |
|
| 280 |
closesocket (listener); |
| 281 |
|
| 282 |
#ifdef USE_SOCKETS_AS_HANDLES |
| 283 |
/* when select isn't winsocket, we also expect socket, connect, accept etc. |
| 284 |
* to work on fds */ |
| 285 |
filedes [0] = sock [0]; |
| 286 |
filedes [1] = sock [1]; |
| 287 |
#else |
| 288 |
filedes [0] = _open_osfhandle (sock [0], 0); |
| 289 |
filedes [1] = _open_osfhandle (sock [1], 0); |
| 290 |
#endif |
| 291 |
|
| 292 |
return 0; |
| 293 |
|
| 294 |
fail: |
| 295 |
closesocket (listener); |
| 296 |
|
| 297 |
if (sock [0] != INVALID_SOCKET) closesocket (sock [0]); |
| 298 |
if (sock [1] != INVALID_SOCKET) closesocket (sock [1]); |
| 299 |
|
| 300 |
return -1; |
| 301 |
} |
| 302 |
|
| 303 |
#define s_socketpair(domain,type,protocol,filedes) s_pipe (filedes) |
| 304 |
|
| 305 |
static int |
| 306 |
s_fd_blocking (int fd, int blocking) |
| 307 |
{ |
| 308 |
u_long nonblocking = !blocking; |
| 309 |
|
| 310 |
return ioctlsocket ((SOCKET)S_TO_HANDLE (fd), FIONBIO, &nonblocking); |
| 311 |
} |
| 312 |
|
| 313 |
#define s_fd_prepare(fd) s_fd_blocking (fd, 0) |
| 314 |
|
| 315 |
#else |
| 316 |
|
| 317 |
#define s_socketpair(domain,type,protocol,filedes) socketpair (domain, type, protocol, filedes) |
| 318 |
#define s_pipe(filedes) pipe (filedes) |
| 319 |
|
| 320 |
static int |
| 321 |
s_fd_blocking (int fd, int blocking) |
| 322 |
{ |
| 323 |
return fcntl (fd, F_SETFL, blocking ? 0 : O_NONBLOCK); |
| 324 |
} |
| 325 |
|
| 326 |
static int |
| 327 |
s_fd_prepare (int fd) |
| 328 |
{ |
| 329 |
return s_fd_blocking (fd, 0) |
| 330 |
|| fcntl (fd, F_SETFD, FD_CLOEXEC); |
| 331 |
} |
| 332 |
|
| 333 |
#endif |
| 334 |
|
| 335 |
#if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
| 336 |
# define SCHMORP_H_HAVE_EVENTFD 1 |
| 337 |
/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
| 338 |
# include <stdint.h> |
| 339 |
# ifdef __cplusplus |
| 340 |
extern "C" { |
| 341 |
# endif |
| 342 |
int eventfd (unsigned int initval, int flags); |
| 343 |
# ifdef __cplusplus |
| 344 |
} |
| 345 |
# endif |
| 346 |
#else |
| 347 |
# define eventfd(initval,flags) -1 |
| 348 |
#endif |
| 349 |
|
| 350 |
typedef struct { |
| 351 |
int fd[2]; /* read, write fd, might be equal */ |
| 352 |
int len; /* write length (1 pipe/socket, 8 eventfd) */ |
| 353 |
} s_epipe; |
| 354 |
|
| 355 |
static int |
| 356 |
s_epipe_new (s_epipe *epp) |
| 357 |
{ |
| 358 |
s_epipe ep; |
| 359 |
|
| 360 |
ep.fd [0] = ep.fd [1] = eventfd (0, 0); |
| 361 |
|
| 362 |
if (ep.fd [0] >= 0) |
| 363 |
{ |
| 364 |
s_fd_prepare (ep.fd [0]); |
| 365 |
ep.len = 8; |
| 366 |
} |
| 367 |
else |
| 368 |
{ |
| 369 |
if (s_pipe (ep.fd)) |
| 370 |
return -1; |
| 371 |
|
| 372 |
if (s_fd_prepare (ep.fd [0]) |
| 373 |
|| s_fd_prepare (ep.fd [1])) |
| 374 |
{ |
| 375 |
dTHX; |
| 376 |
|
| 377 |
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 |
dTHX; |
| 393 |
|
| 394 |
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 |
|
| 402 |
static void |
| 403 |
s_epipe_signal (s_epipe *epp) |
| 404 |
{ |
| 405 |
#ifdef _WIN32 |
| 406 |
/* 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 |
#else |
| 414 |
# if SCHMORP_H_HAVE_EVENTFD |
| 415 |
static uint64_t counter = 1; |
| 416 |
# else |
| 417 |
static char counter [8]; |
| 418 |
# endif |
| 419 |
/* 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 |
#endif |
| 425 |
} |
| 426 |
|
| 427 |
static void |
| 428 |
s_epipe_drain (s_epipe *epp) |
| 429 |
{ |
| 430 |
dTHX; |
| 431 |
char buf [9]; |
| 432 |
|
| 433 |
#ifdef _WIN32 |
| 434 |
recv (epp->fd [0], buf, sizeof (buf), 0); |
| 435 |
#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 |
dTHX; |
| 445 |
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 |
if (dup2 (epn.fd [0], epp->fd [0]) < 0) |
| 456 |
croak ("unable to dup over old event pipe"); /* should not croak */ |
| 457 |
|
| 458 |
close (epn.fd [0]); |
| 459 |
|
| 460 |
if (epn.fd [0] == epn.fd [1]) |
| 461 |
epn.fd [1] = epp->fd [0]; |
| 462 |
|
| 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 |
dTHX; |
| 477 |
#if SCHMORP_H_PREFER_SELECT |
| 478 |
fd_set rfd; |
| 479 |
int fd = s_epipe_fd (epp); |
| 480 |
|
| 481 |
FD_ZERO (&rfd); |
| 482 |
FD_SET (fd, &rfd); |
| 483 |
|
| 484 |
return PerlSock_select (fd + 1, &rfd, 0, 0, 0); |
| 485 |
#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 |
return poll (&pfd, 1, -1); |
| 493 |
#endif |
| 494 |
} |
| 495 |
|
| 496 |
#endif |
| 497 |
|
