EV/schmorp.h

#ifndef SCHMORP_PERL_H_
#define SCHMORP_PERL_H_

/* WARNING
 * This header file is a shared resource between many modules.
 * perl header files MUST already be included.
 */

#include <signal.h>
#include <errno.h>

#if defined(WIN32 ) || defined(_MINIX)
# define SCHMORP_H_PREFER_SELECT 1
#endif

#if !SCHMORP_H_PREFER_SELECT
# include <poll.h>
#endif

/* useful stuff, used by schmorp mostly */

#include "patchlevel.h"

#define PERL_VERSION_ATLEAST(a,b,c)                             \
  (PERL_REVISION > (a)                                          \
   || (PERL_REVISION == (a)                                     \
       && (PERL_VERSION > (b)                                   \
           || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))

#ifndef PERL_MAGIC_ext
# define PERL_MAGIC_ext '~'
#endif

#if !PERL_VERSION_ATLEAST (5,6,0)
# ifndef PL_ppaddr
#  define PL_ppaddr ppaddr
# endif
# ifndef call_sv
#  define call_sv perl_call_sv
# endif
# ifndef get_sv
#  define get_sv perl_get_sv
# endif
# ifndef get_cv
#  define get_cv perl_get_cv
# endif
# ifndef IS_PADGV
#  define IS_PADGV(v) 0
# endif
# ifndef IS_PADCONST
#  define IS_PADCONST(v) 0
# endif
#endif

/* use NV for 32 bit perls as it allows larger offsets */
#if IVSIZE >= 8
typedef IV VAL64;
# define SvVAL64(sv) SvIV (sv)
# define newSVval64(i64) newSViv (i64)
# define sv_setval64(sv,i64) sv_setiv ((sv), (i64))
#else
typedef NV VAL64;
# define SvVAL64(sv) SvNV (sv)
# define newSVval64(i64) newSVnv (i64)
# define sv_setval64(sv,i64) sv_setnv ((sv), (i64))
#endif

/* typemap for the above */
/*
VAL64           T_VAL64

INPUT

T_VAL64
        $var = ($type)SvVAL64 ($arg);

OUTPUT

T_VAL64
        $arg = newSVval64 ($var);
*/

/* 5.11 */
#ifndef CxHASARGS
# define CxHASARGS(cx) (cx)->blk_sub.hasargs
#endif

/* 5.10.0 */
#ifndef SvREFCNT_inc_NN
# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
#endif

/* 5.8.8 */
#ifndef GV_NOTQUAL
# define GV_NOTQUAL 0
#endif
#ifndef newSV
# define newSV(l) NEWSV(0,l)
#endif
#ifndef CvISXSUB_on
# define CvISXSUB_on(cv) (void)cv
#endif
#ifndef CvISXSUB
# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
#endif
#ifndef Newx
# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
#endif

/* 5.8.7 */
#ifndef SvRV_set
# define SvRV_set(s,v) SvRV(s) = (v)
#endif

static int
s_signum (SV *sig)
{
#ifndef SIG_SIZE
  /* kudos to Slaven Rezic for the idea */
  static char sig_size [] = { SIG_NUM };
# define SIG_SIZE (sizeof (sig_size) + 1)
#endif
  dTHX;
  int signum;

  SvGETMAGIC (sig);

  for (signum = 1; signum < SIG_SIZE; ++signum)
    if (strEQ (SvPV_nolen (sig), PL_sig_name [signum]))
      return signum;

  signum = SvIV (sig);

  if (signum > 0 && signum < SIG_SIZE)
    return signum;

  return -1;
}

static int
s_signum_croak (SV *sig)
{
  int signum = s_signum (sig);

  if (signum < 0)
    {
      dTHX;
      croak ("%s: invalid signal name or number", SvPV_nolen (sig));
    }

  return signum;
}

static int
s_fileno (SV *fh, int wr)
{
  dTHX;
  SvGETMAGIC (fh);

  if (SvROK (fh))
    {
      fh = SvRV (fh);
      SvGETMAGIC (fh);
    }

  if (SvTYPE (fh) == SVt_PVGV)
    return PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));

  if (SvOK (fh) && (SvIV (fh) >= 0) && (SvIV (fh) < 0x7fffffffL))
    return SvIV (fh);

  return -1;
}

static int
s_fileno_croak (SV *fh, int wr)
{
  int fd = s_fileno (fh, wr);

  if (fd < 0)
    {
      dTHX;
      croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh));
    }

  return fd;
}

static SV *
s_get_cv (SV *cb_sv)
{
  dTHX;
  HV *st;
  GV *gvp;
  
  return (SV *)sv_2cv (cb_sv, &st, &gvp, 0);
}

static SV *
s_get_cv_croak (SV *cb_sv)
{
  SV *cv = s_get_cv (cb_sv);

  if (!cv)
    {
      dTHX;
      croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv));
    }

  return cv;
}

/*****************************************************************************/
/* gensub: simple closure generation utility */

#define S_GENSUB_ARG CvXSUBANY (cv).any_ptr

/* create a closure from XS, returns a code reference */
/* the arg can be accessed via GENSUB_ARG from the callback */
/* the callback must use dXSARGS/XSRETURN */
static SV *
s_gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
{
  CV *cv = (CV *)newSV (0);

  sv_upgrade ((SV *)cv, SVt_PVCV);

  CvANON_on (cv);
  CvISXSUB_on (cv);
  CvXSUB (cv) = xsub;
  S_GENSUB_ARG = arg;

  return newRV_noinc ((SV *)cv);
}

/*****************************************************************************/
/* portable pipe/socketpair */

#if defined(USE_SOCKETS_AS_HANDLES) || PERL_VERSION_ATLEAST(5,18,0)
# define S_TO_HANDLE(x) ((HANDLE)win32_get_osfhandle (x))
#else
# define S_TO_HANDLE(x) ((HANDLE)x)
#endif

#ifdef _WIN32
/* taken almost verbatim from libev's ev_win32.c */
/* oh, the humanity! */
static int
s_pipe (int filedes [2])
{
  dTHX;

  struct sockaddr_in addr = { 0 };
  int addr_size = sizeof (addr);
  struct sockaddr_in adr2;
  int adr2_size = sizeof (adr2);
  SOCKET listener;
  SOCKET sock [2] = { -1, -1 };

  if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
    return -1;

  addr.sin_family = AF_INET;
  addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
  addr.sin_port = 0;

  if (bind (listener, (struct sockaddr *)&addr, addr_size))
    goto fail;

  if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
    goto fail;

  if (listen (listener, 1))
    goto fail;

  if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
    goto fail;

  if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
    goto fail;

  if ((sock [1] = accept (listener, 0, 0)) < 0)
    goto fail;

  /* windows vista returns fantasy port numbers for getpeername.
   * example for two interconnected tcp sockets:
   *
   * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
   * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
   * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
   * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
   *
   * wow! tridirectional sockets!
   *
   * this way of checking ports seems to work:
   */
  if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
    goto fail;

  if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
    goto fail;

  errno = WSAEINVAL;
  if (addr_size != adr2_size
      || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
      || addr.sin_port        != adr2.sin_port)
    goto fail;

  closesocket (listener);

#if defined(USE_SOCKETS_AS_HANDLES) || PERL_VERSION_ATLEAST(5,18,0)
  /* when select isn't winsocket, we also expect socket, connect, accept etc.
   * to work on fds */
  filedes [0] = sock [0];
  filedes [1] = sock [1];
#else
  filedes [0] = _open_osfhandle (sock [0], 0);
  filedes [1] = _open_osfhandle (sock [1], 0);
#endif

  return 0;

fail:
  closesocket (listener);

  if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
  if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);

  return -1;
}

#define s_socketpair(domain,type,protocol,filedes) s_pipe (filedes)

static int
s_fd_blocking (int fd, int blocking)
{
  u_long nonblocking = !blocking;

  return ioctlsocket ((SOCKET)S_TO_HANDLE (fd), FIONBIO, &nonblocking);
}

#define s_fd_prepare(fd) s_fd_blocking (fd, 0)

#else

#define s_socketpair(domain,type,protocol,filedes) socketpair (domain, type, protocol, filedes)
#define s_pipe(filedes) pipe (filedes)

static int
s_fd_blocking (int fd, int blocking)
{
  return fcntl (fd, F_SETFL, blocking ? 0 : O_NONBLOCK);
}

static int
s_fd_prepare (int fd)
{
  return s_fd_blocking (fd, 0)
         || fcntl (fd, F_SETFD, FD_CLOEXEC);
}

#endif

#if HAVE_EVENTFD
# include <sys/eventfd.h>
#else
# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
#  define SCHMORP_H_HAVE_EVENTFD 1
/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
#  include <stdint.h>
#  ifdef __cplusplus
extern "C" {
#  endif
  int eventfd (unsigned int initval, int flags);
#  ifdef __cplusplus
}
#  endif
# else
#  define eventfd(initval,flags) -1
# endif
#endif

typedef struct {
  int fd[2]; /* read, write fd, might be equal */
  int len; /* write length (1 pipe/socket, 8 eventfd) */
} s_epipe;

static int
s_epipe_new (s_epipe *epp)
{
  s_epipe ep;

  ep.fd [0] = ep.fd [1] = eventfd (0, 0);

  if (ep.fd [0] >= 0)
    {
      s_fd_prepare (ep.fd [0]);
      ep.len = 8;
    }
  else
    {
      if (s_pipe (ep.fd))
        return -1;

      if (s_fd_prepare (ep.fd [0])
          || s_fd_prepare (ep.fd [1]))
        {
           dTHX;

           close (ep.fd [0]);
           close (ep.fd [1]);
           return -1;
        }

      ep.len = 1;
    }

  *epp = ep;
  return 0;
}

static void
s_epipe_destroy (s_epipe *epp)
{
  dTHX;

  close (epp->fd [0]);

  if (epp->fd [1] != epp->fd [0])
    close (epp->fd [1]);

  epp->len = 0;
}

static void
s_epipe_signal (s_epipe *epp)
{
#ifdef _WIN32
  /* perl overrides send with a function that crashes in other threads.
   * unfortunately, it overrides it with an argument-less macro, so
   * there is no way to force usage of the real send function.
   * incompetent windows programmers - is this redundant?
   */
  DWORD dummy;
  WriteFile (S_TO_HANDLE (epp->fd [1]), (LPCVOID)&dummy, 1, &dummy, 0);
#else
  static uint64_t counter = 1;
  /* some modules accept fd's from outside, support eventfd here */
  if (write (epp->fd [1], &counter, epp->len) < 0
      && errno == EINVAL
      && epp->len != 8)
    write (epp->fd [1], &counter, (epp->len = 8));
#endif
}

static void
s_epipe_drain (s_epipe *epp)
{
  dTHX;
  char buf [9];

#ifdef _WIN32
  recv (epp->fd [0], buf, sizeof (buf), 0);
#else
  read (epp->fd [0], buf, sizeof (buf));
#endif
}

/* like new, but dups over old */
static int
s_epipe_renew (s_epipe *epp)
{
  dTHX;
  s_epipe epn;

  if (epp->fd [1] != epp->fd [0])
    close (epp->fd [1]);

  if (s_epipe_new (&epn))
    return -1;

  if (epp->len)
    {
      if (dup2 (epn.fd [0], epp->fd [0]) < 0)
        croak ("unable to dup over old event pipe"); /* should not croak */

      close (epn.fd [0]);

      if (epn.fd [0] == epn.fd [1])
        epn.fd [1] = epp->fd [0];

      epn.fd [0] = epp->fd [0];
    }

  *epp = epn;

  return 0;
}

#define s_epipe_fd(epp) ((epp)->fd [0])

static int
s_epipe_wait (s_epipe *epp)
{
  dTHX;
#if SCHMORP_H_PREFER_SELECT
  fd_set rfd;
  int fd = s_epipe_fd (epp);

  FD_ZERO (&rfd);
  FD_SET (fd, &rfd);

  return PerlSock_select (fd + 1, &rfd, 0, 0, 0);
#else
  /* poll is preferable on posix systems */
  struct pollfd pfd;

  pfd.fd = s_epipe_fd (epp);
  pfd.events = POLLIN;

  return poll (&pfd, 1, -1);
#endif
}

#endif

Revision:	1.16
Committed:	Tue Nov 19 13:08:54 2019 UTC (4 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	EV-rel-4_28, EV-rel-4_29, EV-rel-4_31, EV-rel-4_30, EV-rel-4_33, EV-rel-4_32, EV-rel-4_34, HEAD
Changes since 1.15:	+2 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef SCHMORP_PERL_H_
2			#define SCHMORP_PERL_H_
3
4	root	1.2	/* WARNING
5			* This header file is a shared resource between many modules.
6	root	1.10	* perl header files MUST already be included.
7	root	1.2	*/
8
9	root	1.4	#include <signal.h>
10	root	1.5	#include <errno.h>
11	root	1.4
12	root	1.9	#if defined(WIN32 ) \|\| defined(_MINIX)
13			# define SCHMORP_H_PREFER_SELECT 1
14			#endif
15
16			#if !SCHMORP_H_PREFER_SELECT
17	root	1.4	# include <poll.h>
18			#endif
19
20	root	1.1	/* useful stuff, used by schmorp mostly */
21
22	root	1.2	#include "patchlevel.h"
23
24	root	1.1	#define PERL_VERSION_ATLEAST(a,b,c) \
25			(PERL_REVISION > (a) \
26			\|\| (PERL_REVISION == (a) \
27			&& (PERL_VERSION > (b) \
28			\|\| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
29
30	root	1.7	#ifndef PERL_MAGIC_ext
31			# define PERL_MAGIC_ext '~'
32			#endif
33
34	root	1.1	#if !PERL_VERSION_ATLEAST (5,6,0)
35			# ifndef PL_ppaddr
36			# define PL_ppaddr ppaddr
37			# endif
38			# ifndef call_sv
39			# define call_sv perl_call_sv
40			# endif
41			# ifndef get_sv
42			# define get_sv perl_get_sv
43			# endif
44			# ifndef get_cv
45			# define get_cv perl_get_cv
46			# endif
47			# ifndef IS_PADGV
48			# define IS_PADGV(v) 0
49			# endif
50			# ifndef IS_PADCONST
51			# define IS_PADCONST(v) 0
52			# endif
53			#endif
54
55	root	1.10	/* use NV for 32 bit perls as it allows larger offsets */
56			#if IVSIZE >= 8
57			typedef IV VAL64;
58			# define SvVAL64(sv) SvIV (sv)
59			# define newSVval64(i64) newSViv (i64)
60	root	1.16	# define sv_setval64(sv,i64) sv_setiv ((sv), (i64))
61	root	1.10	#else
62			typedef NV VAL64;
63			# define SvVAL64(sv) SvNV (sv)
64			# define newSVval64(i64) newSVnv (i64)
65	root	1.16	# define sv_setval64(sv,i64) sv_setnv ((sv), (i64))
66	root	1.10	#endif
67
68			/* typemap for the above */
69			/*
70			VAL64 T_VAL64
71
72			INPUT
73
74			T_VAL64
75			$var = ($type)SvVAL64 ($arg);
76
77			OUTPUT
78
79			T_VAL64
80			$arg = newSVval64 ($var);
81			*/
82
83	root	1.1	/* 5.11 */
84			#ifndef CxHASARGS
85			# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86			#endif
87
88			/* 5.10.0 */
89			#ifndef SvREFCNT_inc_NN
90			# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91			#endif
92
93			/* 5.8.8 */
94			#ifndef GV_NOTQUAL
95			# define GV_NOTQUAL 0
96			#endif
97			#ifndef newSV
98			# define newSV(l) NEWSV(0,l)
99			#endif
100			#ifndef CvISXSUB_on
101			# define CvISXSUB_on(cv) (void)cv
102			#endif
103			#ifndef CvISXSUB
104			# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105			#endif
106			#ifndef Newx
107			# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108			#endif
109
110			/* 5.8.7 */
111			#ifndef SvRV_set
112			# define SvRV_set(s,v) SvRV(s) = (v)
113			#endif
114
115			static int
116			s_signum (SV *sig)
117			{
118			#ifndef SIG_SIZE
119			/* kudos to Slaven Rezic for the idea */
120			static char sig_size [] = { SIG_NUM };
121			# define SIG_SIZE (sizeof (sig_size) + 1)
122			#endif
123	root	1.2	dTHX;
124	root	1.1	int signum;
125
126			SvGETMAGIC (sig);
127
128			for (signum = 1; signum < SIG_SIZE; ++signum)
129			if (strEQ (SvPV_nolen (sig), PL_sig_name [signum]))
130			return signum;
131
132			signum = SvIV (sig);
133
134			if (signum > 0 && signum < SIG_SIZE)
135			return signum;
136
137			return -1;
138			}
139
140			static int
141			s_signum_croak (SV *sig)
142			{
143			int signum = s_signum (sig);
144
145			if (signum < 0)
146	root	1.2	{
147			dTHX;
148			croak ("%s: invalid signal name or number", SvPV_nolen (sig));
149			}
150	root	1.1
151			return signum;
152			}
153
154			static int
155			s_fileno (SV *fh, int wr)
156			{
157	root	1.2	dTHX;
158	root	1.1	SvGETMAGIC (fh);
159
160			if (SvROK (fh))
161			{
162			fh = SvRV (fh);
163			SvGETMAGIC (fh);
164			}
165
166			if (SvTYPE (fh) == SVt_PVGV)
167			return PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
168
169			if (SvOK (fh) && (SvIV (fh) >= 0) && (SvIV (fh) < 0x7fffffffL))
170			return SvIV (fh);
171
172			return -1;
173			}
174
175			static int
176			s_fileno_croak (SV *fh, int wr)
177			{
178			int fd = s_fileno (fh, wr);
179
180			if (fd < 0)
181	root	1.2	{
182			dTHX;
183			croak ("%s: illegal fh argument, either not an OS file or read/write mode mismatch", SvPV_nolen (fh));
184			}
185	root	1.1
186			return fd;
187			}
188
189			static SV *
190			s_get_cv (SV *cb_sv)
191			{
192	root	1.2	dTHX;
193	root	1.1	HV *st;
194			GV *gvp;
195	root	1.13
196	root	1.2	return (SV *)sv_2cv (cb_sv, &st, &gvp, 0);
197	root	1.1	}
198
199			static SV *
200			s_get_cv_croak (SV *cb_sv)
201			{
202	root	1.2	SV *cv = s_get_cv (cb_sv);
203	root	1.1
204	root	1.2	if (!cv)
205			{
206			dTHX;
207			croak ("%s: callback must be a CODE reference or another callable object", SvPV_nolen (cb_sv));
208			}
209	root	1.1
210	root	1.2	return cv;
211	root	1.1	}
212
213			/*****************************************************************************/
214			/* gensub: simple closure generation utility */
215
216			#define S_GENSUB_ARG CvXSUBANY (cv).any_ptr
217
218			/* create a closure from XS, returns a code reference */
219			/* the arg can be accessed via GENSUB_ARG from the callback */
220			/* the callback must use dXSARGS/XSRETURN */
221			static SV *
222			s_gensub (pTHX_ void (xsub)(pTHX_ CV ), void *arg)
223			{
224			CV cv = (CV )newSV (0);
225
226			sv_upgrade ((SV *)cv, SVt_PVCV);
227
228			CvANON_on (cv);
229			CvISXSUB_on (cv);
230			CvXSUB (cv) = xsub;
231			S_GENSUB_ARG = arg;
232
233			return newRV_noinc ((SV *)cv);
234			}
235
236	root	1.4	/*****************************************************************************/
237			/* portable pipe/socketpair */
238	root	1.3
239	root	1.14	#if defined(USE_SOCKETS_AS_HANDLES) \|\| PERL_VERSION_ATLEAST(5,18,0)
240	root	1.4	# define S_TO_HANDLE(x) ((HANDLE)win32_get_osfhandle (x))
241	root	1.3	#else
242	root	1.4	# define S_TO_HANDLE(x) ((HANDLE)x)
243	root	1.3	#endif
244
245			#ifdef _WIN32
246			/* taken almost verbatim from libev's ev_win32.c */
247			/* oh, the humanity! */
248			static int
249			s_pipe (int filedes [2])
250			{
251	root	1.6	dTHX;
252
253	root	1.3	struct sockaddr_in addr = { 0 };
254			int addr_size = sizeof (addr);
255			struct sockaddr_in adr2;
256			int adr2_size = sizeof (adr2);
257			SOCKET listener;
258			SOCKET sock [2] = { -1, -1 };
259
260	root	1.13	if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
261	root	1.3	return -1;
262
263			addr.sin_family = AF_INET;
264			addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
265			addr.sin_port = 0;
266
267			if (bind (listener, (struct sockaddr *)&addr, addr_size))
268			goto fail;
269
270			if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
271			goto fail;
272
273			if (listen (listener, 1))
274			goto fail;
275
276	root	1.13	if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
277	root	1.3	goto fail;
278
279			if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
280			goto fail;
281
282			if ((sock [1] = accept (listener, 0, 0)) < 0)
283			goto fail;
284
285			/* windows vista returns fantasy port numbers for getpeername.
286			* example for two interconnected tcp sockets:
287			*
288			* (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
289			* (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
290			* (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
291			* (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
292			*
293			* wow! tridirectional sockets!
294			*
295			* this way of checking ports seems to work:
296			*/
297			if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
298			goto fail;
299
300			if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
301			goto fail;
302
303			errno = WSAEINVAL;
304			if (addr_size != adr2_size
305			\|\| addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
306			\|\| addr.sin_port != adr2.sin_port)
307			goto fail;
308
309			closesocket (listener);
310
311	root	1.15	#if defined(USE_SOCKETS_AS_HANDLES) \|\| PERL_VERSION_ATLEAST(5,18,0)
312	root	1.3	/* when select isn't winsocket, we also expect socket, connect, accept etc.
313			* to work on fds */
314			filedes [0] = sock [0];
315			filedes [1] = sock [1];
316			#else
317			filedes [0] = _open_osfhandle (sock [0], 0);
318			filedes [1] = _open_osfhandle (sock [1], 0);
319			#endif
320
321			return 0;
322
323			fail:
324			closesocket (listener);
325
326			if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
327			if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
328
329			return -1;
330			}
331
332			#define s_socketpair(domain,type,protocol,filedes) s_pipe (filedes)
333
334	root	1.4	static int
335			s_fd_blocking (int fd, int blocking)
336			{
337			u_long nonblocking = !blocking;
338
339			return ioctlsocket ((SOCKET)S_TO_HANDLE (fd), FIONBIO, &nonblocking);
340			}
341
342			#define s_fd_prepare(fd) s_fd_blocking (fd, 0)
343
344	root	1.3	#else
345
346			#define s_socketpair(domain,type,protocol,filedes) socketpair (domain, type, protocol, filedes)
347			#define s_pipe(filedes) pipe (filedes)
348
349	root	1.4	static int
350			s_fd_blocking (int fd, int blocking)
351			{
352			return fcntl (fd, F_SETFL, blocking ? 0 : O_NONBLOCK);
353			}
354
355			static int
356			s_fd_prepare (int fd)
357			{
358			return s_fd_blocking (fd, 0)
359			\|\| fcntl (fd, F_SETFD, FD_CLOEXEC);
360			}
361
362			#endif
363
364	root	1.15	#if HAVE_EVENTFD
365			# include <sys/eventfd.h>
366			#else
367			# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
368			# define SCHMORP_H_HAVE_EVENTFD 1
369	root	1.4	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
370	root	1.15	# include <stdint.h>
371			# ifdef __cplusplus
372	root	1.4	extern "C" {
373	root	1.15	# endif
374	root	1.4	int eventfd (unsigned int initval, int flags);
375	root	1.15	# ifdef __cplusplus
376	root	1.4	}
377	root	1.15	# endif
378			# else
379			# define eventfd(initval,flags) -1
380	root	1.4	# endif
381			#endif
382
383			typedef struct {
384			int fd[2]; /* read, write fd, might be equal */
385			int len; /* write length (1 pipe/socket, 8 eventfd) */
386			} s_epipe;
387
388			static int
389			s_epipe_new (s_epipe *epp)
390			{
391			s_epipe ep;
392
393			ep.fd [0] = ep.fd [1] = eventfd (0, 0);
394
395			if (ep.fd [0] >= 0)
396			{
397			s_fd_prepare (ep.fd [0]);
398			ep.len = 8;
399			}
400			else
401			{
402			if (s_pipe (ep.fd))
403			return -1;
404
405			if (s_fd_prepare (ep.fd [0])
406			\|\| s_fd_prepare (ep.fd [1]))
407			{
408	root	1.6	dTHX;
409
410	root	1.4	close (ep.fd [0]);
411			close (ep.fd [1]);
412			return -1;
413			}
414
415			ep.len = 1;
416			}
417
418			*epp = ep;
419			return 0;
420			}
421
422			static void
423			s_epipe_destroy (s_epipe *epp)
424			{
425	root	1.6	dTHX;
426
427	root	1.4	close (epp->fd [0]);
428
429			if (epp->fd [1] != epp->fd [0])
430			close (epp->fd [1]);
431
432			epp->len = 0;
433			}
434
435			static void
436			s_epipe_signal (s_epipe *epp)
437			{
438			#ifdef _WIN32
439	root	1.6	/* perl overrides send with a function that crashes in other threads.
440			* unfortunately, it overrides it with an argument-less macro, so
441			* there is no way to force usage of the real send function.
442			* incompetent windows programmers - is this redundant?
443			*/
444			DWORD dummy;
445			WriteFile (S_TO_HANDLE (epp->fd [1]), (LPCVOID)&dummy, 1, &dummy, 0);
446	root	1.4	#else
447	root	1.6	static uint64_t counter = 1;
448			/* some modules accept fd's from outside, support eventfd here */
449			if (write (epp->fd [1], &counter, epp->len) < 0
450			&& errno == EINVAL
451			&& epp->len != 8)
452			write (epp->fd [1], &counter, (epp->len = 8));
453	root	1.4	#endif
454			}
455
456			static void
457			s_epipe_drain (s_epipe *epp)
458			{
459	root	1.6	dTHX;
460	root	1.4	char buf [9];
461
462			#ifdef _WIN32
463			recv (epp->fd [0], buf, sizeof (buf), 0);
464			#else
465			read (epp->fd [0], buf, sizeof (buf));
466	root	1.3	#endif
467	root	1.4	}
468
469			/* like new, but dups over old */
470			static int
471			s_epipe_renew (s_epipe *epp)
472			{
473	root	1.6	dTHX;
474	root	1.4	s_epipe epn;
475
476			if (epp->fd [1] != epp->fd [0])
477			close (epp->fd [1]);
478
479			if (s_epipe_new (&epn))
480			return -1;
481
482			if (epp->len)
483			{
484			if (dup2 (epn.fd [0], epp->fd [0]) < 0)
485			croak ("unable to dup over old event pipe"); /* should not croak */
486
487	root	1.8	close (epn.fd [0]);
488
489			if (epn.fd [0] == epn.fd [1])
490			epn.fd [1] = epp->fd [0];
491	root	1.4
492			epn.fd [0] = epp->fd [0];
493			}
494
495			*epp = epn;
496
497			return 0;
498			}
499
500			#define s_epipe_fd(epp) ((epp)->fd [0])
501
502			static int
503			s_epipe_wait (s_epipe *epp)
504			{
505	root	1.6	dTHX;
506	root	1.9	#if SCHMORP_H_PREFER_SELECT
507	root	1.4	fd_set rfd;
508			int fd = s_epipe_fd (epp);
509
510			FD_ZERO (&rfd);
511			FD_SET (fd, &rfd);
512
513			return PerlSock_select (fd + 1, &rfd, 0, 0, 0);
514			#else
515			/* poll is preferable on posix systems */
516			struct pollfd pfd;
517
518			pfd.fd = s_epipe_fd (epp);
519			pfd.events = POLLIN;
520
521	root	1.7	return poll (&pfd, 1, -1);
522	root	1.4	#endif
523			}
524
525	root	1.1	#endif
526