Async-Interrupt/Interrupt.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include "schmorp.h"

typedef volatile sig_atomic_t atomic_t;

static int *sig_pending, *psig_pend; /* make local copies because of missing THX */
static Sighandler_t old_sighandler;
static atomic_t async_pending;

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

#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
# define HAS_SA_SIGINFO 1
#endif

#if !PERL_VERSION_ATLEAST(5,10,0)
# undef HAS_SA_SIGINFO
#endif

/*****************************************************************************/

typedef struct {
  SV *cb;
  void (*c_cb)(pTHX_ void *c_arg, int value);
  void *c_arg;
  SV *fh_r, *fh_w;
  SV *value;
  int signum;
  int autodrain;
  volatile int blocked;

  s_epipe ep;
  int fd_wlen;
  atomic_t fd_enable;
  atomic_t pending;
  volatile IV *valuep;
} async_t;

static AV *asyncs;
static async_t *sig_async [SIG_SIZE];

#define SvASYNC_nrv(sv) INT2PTR (async_t *, SvIVX (sv))
#define SvASYNC(rv)     SvASYNC_nrv (SvRV (rv))

/* the main workhorse to signal */
static void
async_signal (void *signal_arg, int value)
{
  static char pipedata [8];

  async_t *async = (async_t *)signal_arg;
  int pending = async->pending;

  *async->valuep = value ? value : 1;
  async->pending = 1;
  async_pending  = 1;
  psig_pend [9]  = 1;
  *sig_pending   = 1;

  if (!pending && async->fd_enable && async->ep.len)
    s_epipe_signal (&async->ep);
}

static void
handle_async (async_t *async)
{
  int old_errno = errno;
  int value = *async->valuep;

  *async->valuep = 0;
  async->pending = 0;

  /* drain pipe */
  if (async->fd_enable && async->ep.len && async->autodrain)
    s_epipe_drain (&async->ep);

  if (async->c_cb)
    {
      dTHX;
      async->c_cb (aTHX_ async->c_arg, value);
    }

  if (async->cb)
    {
      dSP;

      SV *saveerr = SvOK (ERRSV) ? sv_mortalcopy (ERRSV) : 0;
      SV *savedie = PL_diehook;

      PL_diehook = 0;

      PUSHSTACKi (PERLSI_SIGNAL);

      PUSHMARK (SP);
      XPUSHs (sv_2mortal (newSViv (value)));
      PUTBACK;
      call_sv (async->cb, G_VOID | G_DISCARD | G_EVAL);

      if (SvTRUE (ERRSV))
        {
          SPAGAIN;

          PUSHMARK (SP);
          PUTBACK;
          call_sv (get_sv ("Async::Interrupt::DIED", 1), G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);

          sv_setpvn (ERRSV, "", 0);
        }

      if (saveerr)
        sv_setsv (ERRSV, saveerr);

      {
        SV *oldhook = PL_diehook;
        PL_diehook = savedie;
        SvREFCNT_dec (oldhook);
      }

      POPSTACK;
    }

  errno = old_errno;
}

static void
handle_asyncs (void)
{
  int i;

  async_pending = 0;

  for (i = AvFILLp (asyncs); i >= 0; --i)
    {
      SV *async_sv = AvARRAY (asyncs)[i];
      async_t *async = SvASYNC_nrv (async_sv);

      if (async->pending && !async->blocked)
        {
          /* temporarily keep a refcount */
          SvREFCNT_inc (async_sv);
          handle_async (async);
          SvREFCNT_dec (async_sv);

          /* the handler could have deleted any number of asyncs */
          if (i > AvFILLp (asyncs))
            i = AvFILLp (asyncs);
        }
    }
}

#if HAS_SA_SIGINFO
static Signal_t async_sighandler (int signum, siginfo_t *si, void *sarg)
{
  if (signum == 9)
    handle_asyncs ();
  else
    old_sighandler (signum, si, sarg);
}
#else
static Signal_t async_sighandler (int signum)
{
  if (signum == 9)
    handle_asyncs ();
  else
    old_sighandler (signum);
}
#endif

static void
async_sigsend (int signum)
{
  async_signal (sig_async [signum], 0);
}

#define block(async) ++(async)->blocked

static void
unblock (async_t *async)
{
  --async->blocked;
  if (async->pending && !async->blocked)
    handle_async (async);
}

static void
scope_block_cb (pTHX_ void *async_sv)
{
  async_t *async = SvASYNC_nrv ((SV *)async_sv);
  unblock (async);
  SvREFCNT_dec (async_sv);
}

MODULE = Async::Interrupt               PACKAGE = Async::Interrupt

BOOT:
        old_sighandler = PL_sighandlerp;
        PL_sighandlerp = async_sighandler;
        sig_pending = &PL_sig_pending;
        psig_pend   = PL_psig_pend;
        asyncs      = newAV ();
        CvNODEBUG_on (get_cv ("Async::Interrupt::scope_block", 0)); /* otherwise calling scope can be the debugger */

PROTOTYPES: DISABLE

void
_alloc (SV *cb, void *c_cb, void *c_arg, SV *fh_r, SV *fh_w, SV *signl, SV *pvalue)
        PPCODE:
{
        SV *cv   = SvOK (cb) ? SvREFCNT_inc (s_get_cv_croak (cb)) : 0;
        async_t *async;

        Newz (0, async, 1, async_t);

        XPUSHs (sv_2mortal (newSViv (PTR2IV (async))));
        /* TODO: need to bless right now to ensure deallocation */
        av_push (asyncs, TOPs);

        SvGETMAGIC (fh_r); SvGETMAGIC (fh_w);
        if (SvOK (fh_r) || SvOK (fh_w))
          {
            int fd_r = s_fileno_croak (fh_r, 0);
            int fd_w = s_fileno_croak (fh_w, 1);

            async->fh_r      = newSVsv (fh_r);
            async->fh_w      = newSVsv (fh_w);
            async->ep.fd [0] = fd_r;
            async->ep.fd [1] = fd_w;
            async->ep.len    = 1;
            async->fd_enable = 1;
          }

        async->value     = SvROK (pvalue)
                           ? SvREFCNT_inc_NN (SvRV (pvalue))
                           : NEWSV (0, 0);

        sv_setiv (async->value, 0);
        SvIOK_only (async->value); /* just to be sure */
        SvREADONLY_on (async->value);

        async->valuep    = &(SvIVX (async->value));

        async->autodrain = 1;
        async->cb        = cv;
        async->c_cb      = c_cb;
        async->c_arg     = c_arg;
        async->signum    = SvOK (signl) ? s_signum_croak (signl) : 0;

        if (async->signum)
          {
            if (async->signum < 0)
              croak ("Async::Interrupt::new got passed illegal signal name or number: %s", SvPV_nolen (signl));

            sig_async [async->signum] = async;
#if _WIN32
            signal (async->signum, async_sigsend);
#else
            {
              struct sigaction sa;
              sa.sa_handler = async_sigsend;
              sigfillset (&sa.sa_mask);
              sa.sa_flags = 0; /* if we interrupt a syscall, we might drain the pipe before it became ready */
              sigaction (async->signum, &sa, 0);
            }
#endif
          }
}

void
signal_func (async_t *async)
        PPCODE:
        EXTEND (SP, 2);
        PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal))));
        PUSHs (sv_2mortal (newSViv (PTR2IV (async))));

IV
c_var (async_t *async)
        CODE:
        RETVAL = PTR2IV (async->valuep);
        OUTPUT:
        RETVAL

void
signal (async_t *async, int value = 1)
        CODE:
        async_signal (async, value);

void
block (async_t *async)
        CODE:
        block (async);

void
unblock (async_t *async)
        CODE:
        unblock (async);

void
scope_block (SV *self)
        CODE:
{
        SV *async_sv = SvRV (self);
        async_t *async = SvASYNC_nrv (async_sv);
        block (async);

        LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
        SAVEDESTRUCTOR_X (scope_block_cb, (void *)SvREFCNT_inc (async_sv));
        ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
}

void
pipe_enable (async_t *async)
        ALIAS:
        pipe_enable = 1
        pipe_disable = 0
        CODE:
        async->fd_enable = ix;

int
pipe_fileno (async_t *async)
        CODE:
        if (!async->ep.len)
          {
            int res;

            /*block (async);*//*TODO*/
            res = s_epipe_new (&async->ep);
            async->fd_enable = 1;
            /*unblock (async);*//*TODO*/

            if (res < 0)
              croak ("Async::Interrupt: unable to initialize event pipe");
          }

        RETVAL = async->ep.fd [0];
        OUTPUT:
        RETVAL

int
pipe_autodrain (async_t *async, int enable = -1)
        CODE:
        RETVAL = async->autodrain;
        if (enable >= 0)
          async->autodrain = enable;
        OUTPUT:
        RETVAL

void
post_fork (async_t *async)
        CODE:
        if (async->ep.len)
          {
            int res;

            /*block (async);*//*TODO*/
            res = s_epipe_renew (&async->ep);
            /*unblock (async);*//*TODO*/

            if (res < 0)
              croak ("Async::Interrupt: unable to initialize event pipe after fork");
          }

void
DESTROY (SV *self)
        CODE:
{
        int i;
        SV *async_sv = SvRV (self);
        async_t *async = SvASYNC_nrv (async_sv);

        for (i = AvFILLp (asyncs); i >= 0; --i)
          if (AvARRAY (asyncs)[i] == async_sv)
            {
              AvARRAY (asyncs)[i] = AvARRAY (asyncs)[AvFILLp (asyncs)];
              av_pop (asyncs);
              goto found;
            }

        if (!PL_dirty)
          warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report");

        found:

        if (async->signum)
          {
#if _WIN32
            signal (async->signum, SIG_DFL);
#else
            {
              struct sigaction sa;
              sa.sa_handler = SIG_DFL;
              sigemptyset (&sa.sa_mask);
              sa.sa_flags = 0;
              sigaction (async->signum, &sa, 0);
            }
#endif
          }

        if (!async->fh_r && async->ep.len)
          s_epipe_destroy (&async->ep);

        SvREFCNT_dec (async->fh_r);
        SvREFCNT_dec (async->fh_w);
        SvREFCNT_dec (async->cb);
        SvREFCNT_dec (async->value);

        Safefree (async);
}

MODULE = Async::Interrupt               PACKAGE = Async::Interrupt::EventPipe           PREFIX = s_epipe_

void
new (const char *klass)
        PPCODE:
{
        s_epipe *epp;
        SV *self;

        Newz (0, epp, 1, s_epipe);
        XPUSHs (sv_setref_iv (sv_newmortal (), klass, PTR2IV (epp)));

        if (s_epipe_new (epp) < 0)
          croak ("Async::Interrupt::EventPipe: unable to create new event pipe");
}

void
filenos (s_epipe *epp)
        PPCODE:
        EXTEND (SP, 2);
        PUSHs (sv_2mortal (newSViv (epp->fd [0])));
        PUSHs (sv_2mortal (newSViv (epp->fd [1])));

int
fileno (s_epipe *epp)
        ALIAS:
        fileno   = 0
        fileno_r = 0
        fileno_w = 1
        CODE:
        RETVAL = epp->fd [ix];
        OUTPUT:
        RETVAL

int
type (s_epipe *epp)
        CODE:
        RETVAL = epp->len;
        OUTPUT:
        RETVAL

void
s_epipe_signal (s_epipe *epp)

void
s_epipe_drain (s_epipe *epp)

void
DESTROY (s_epipe *epp)
        CODE:
        s_epipe_destroy (epp);

Revision:	1.12
Committed:	Sat Jul 18 05:14:19 2009 UTC (14 years, 10 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_06
Changes since 1.11:	+19 -8 lines
Log Message:	0.6
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5	root	1.8	#include "schmorp.h"
6
7	root	1.1	typedef volatile sig_atomic_t atomic_t;
8
9			static int sig_pending, psig_pend; /* make local copies because of missing THX */
10			static Sighandler_t old_sighandler;
11			static atomic_t async_pending;
12
13	root	1.5	#define PERL_VERSION_ATLEAST(a,b,c) \
14			(PERL_REVISION > (a) \
15			\|\| (PERL_REVISION == (a) \
16			&& (PERL_VERSION > (b) \
17			\|\| (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
18
19			#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
20			# define HAS_SA_SIGINFO 1
21			#endif
22
23			#if !PERL_VERSION_ATLEAST(5,10,0)
24			# undef HAS_SA_SIGINFO
25			#endif
26
27	root	1.6	/*****************************************************************************/
28	root	1.1
29	root	1.6	typedef struct {
30	root	1.1	SV *cb;
31	root	1.2	void (c_cb)(pTHX_ void c_arg, int value);
32			void *c_arg;
33			SV fh_r, fh_w;
34	root	1.9	SV *value;
35	root	1.6	int signum;
36	root	1.11	int autodrain;
37	root	1.7	volatile int blocked;
38	root	1.1
39	root	1.9	s_epipe ep;
40	root	1.6	int fd_wlen;
41			atomic_t fd_enable;
42	root	1.2	atomic_t pending;
43	root	1.9	volatile IV *valuep;
44	root	1.6	} async_t;
45
46			static AV *asyncs;
47			static async_t *sig_async [SIG_SIZE];
48
49			#define SvASYNC_nrv(sv) INT2PTR (async_t *, SvIVX (sv))
50			#define SvASYNC(rv) SvASYNC_nrv (SvRV (rv))
51	root	1.1
52			/* the main workhorse to signal */
53			static void
54			async_signal (void *signal_arg, int value)
55			{
56	root	1.6	static char pipedata [8];
57
58			async_t async = (async_t )signal_arg;
59	root	1.2	int pending = async->pending;
60	root	1.1
61	root	1.9	*async->valuep = value ? value : 1;
62	root	1.2	async->pending = 1;
63			async_pending = 1;
64			psig_pend [9] = 1;
65			*sig_pending = 1;
66	root	1.1
67	root	1.10	if (!pending && async->fd_enable && async->ep.len)
68			s_epipe_signal (&async->ep);
69	root	1.2	}
70
71			static void
72	root	1.6	handle_async (async_t *async)
73	root	1.2	{
74			int old_errno = errno;
75	root	1.9	int value = *async->valuep;
76	root	1.2
77	root	1.9	*async->valuep = 0;
78	root	1.2	async->pending = 0;
79
80			/* drain pipe */
81	root	1.11	if (async->fd_enable && async->ep.len && async->autodrain)
82	root	1.9	s_epipe_drain (&async->ep);
83	root	1.2
84			if (async->c_cb)
85			{
86			dTHX;
87			async->c_cb (aTHX_ async->c_arg, value);
88			}
89
90			if (async->cb)
91			{
92			dSP;
93
94			SV *saveerr = SvOK (ERRSV) ? sv_mortalcopy (ERRSV) : 0;
95			SV *savedie = PL_diehook;
96
97			PL_diehook = 0;
98
99			PUSHSTACKi (PERLSI_SIGNAL);
100
101			PUSHMARK (SP);
102			XPUSHs (sv_2mortal (newSViv (value)));
103			PUTBACK;
104			call_sv (async->cb, G_VOID \| G_DISCARD \| G_EVAL);
105
106			if (SvTRUE (ERRSV))
107			{
108			SPAGAIN;
109
110			PUSHMARK (SP);
111			PUTBACK;
112			call_sv (get_sv ("Async::Interrupt::DIED", 1), G_VOID \| G_DISCARD \| G_EVAL \| G_KEEPERR);
113
114			sv_setpvn (ERRSV, "", 0);
115			}
116
117			if (saveerr)
118			sv_setsv (ERRSV, saveerr);
119	root	1.1
120	root	1.2	{
121			SV *oldhook = PL_diehook;
122			PL_diehook = savedie;
123			SvREFCNT_dec (oldhook);
124			}
125
126			POPSTACK;
127	root	1.1	}
128
129	root	1.2	errno = old_errno;
130	root	1.1	}
131
132			static void
133	root	1.2	handle_asyncs (void)
134	root	1.1	{
135	root	1.2	int i;
136
137	root	1.1	async_pending = 0;
138	root	1.2
139			for (i = AvFILLp (asyncs); i >= 0; --i)
140			{
141	root	1.12	SV *async_sv = AvARRAY (asyncs)[i];
142			async_t *async = SvASYNC_nrv (async_sv);
143	root	1.2
144			if (async->pending && !async->blocked)
145	root	1.12	{
146			/* temporarily keep a refcount */
147			SvREFCNT_inc (async_sv);
148			handle_async (async);
149			SvREFCNT_dec (async_sv);
150
151			/* the handler could have deleted any number of asyncs */
152			if (i > AvFILLp (asyncs))
153			i = AvFILLp (asyncs);
154			}
155	root	1.2	}
156	root	1.1	}
157
158	root	1.5	#if HAS_SA_SIGINFO
159	root	1.1	static Signal_t async_sighandler (int signum, siginfo_t si, void sarg)
160			{
161			if (signum == 9)
162	root	1.2	handle_asyncs ();
163	root	1.1	else
164			old_sighandler (signum, si, sarg);
165			}
166			#else
167	root	1.3	static Signal_t async_sighandler (int signum)
168	root	1.1	{
169			if (signum == 9)
170	root	1.3	handle_asyncs ();
171	root	1.1	else
172			old_sighandler (signum);
173			}
174			#endif
175
176	root	1.4	static void
177	root	1.6	async_sigsend (int signum)
178			{
179			async_signal (sig_async [signum], 0);
180			}
181
182	root	1.7	#define block(async) ++(async)->blocked
183
184	root	1.6	static void
185	root	1.7	unblock (async_t *async)
186	root	1.4	{
187			--async->blocked;
188			if (async->pending && !async->blocked)
189			handle_async (async);
190	root	1.7	}
191	root	1.4
192	root	1.7	static void
193			scope_block_cb (pTHX_ void *async_sv)
194			{
195			async_t async = SvASYNC_nrv ((SV )async_sv);
196			unblock (async);
197	root	1.4	SvREFCNT_dec (async_sv);
198			}
199	root	1.1
200			MODULE = Async::Interrupt PACKAGE = Async::Interrupt
201
202			BOOT:
203			old_sighandler = PL_sighandlerp;
204			PL_sighandlerp = async_sighandler;
205			sig_pending = &PL_sig_pending;
206			psig_pend = PL_psig_pend;
207			asyncs = newAV ();
208	root	1.4	CvNODEBUG_on (get_cv ("Async::Interrupt::scope_block", 0)); /* otherwise calling scope can be the debugger */
209	root	1.1
210	root	1.3	PROTOTYPES: DISABLE
211
212	root	1.6	void
213	root	1.9	_alloc (SV cb, void c_cb, void c_arg, SV fh_r, SV fh_w, SV signl, SV *pvalue)
214	root	1.6	PPCODE:
215	root	1.1	{
216	root	1.8	SV *cv = SvOK (cb) ? SvREFCNT_inc (s_get_cv_croak (cb)) : 0;
217	root	1.6	async_t *async;
218	root	1.1
219	root	1.6	Newz (0, async, 1, async_t);
220	root	1.1
221	root	1.6	XPUSHs (sv_2mortal (newSViv (PTR2IV (async))));
222	root	1.9	/* TODO: need to bless right now to ensure deallocation */
223	root	1.6	av_push (asyncs, TOPs);
224	root	1.2
225	root	1.9	SvGETMAGIC (fh_r); SvGETMAGIC (fh_w);
226			if (SvOK (fh_r) \|\| SvOK (fh_w))
227			{
228			int fd_r = s_fileno_croak (fh_r, 0);
229			int fd_w = s_fileno_croak (fh_w, 1);
230
231			async->fh_r = newSVsv (fh_r);
232			async->fh_w = newSVsv (fh_w);
233			async->ep.fd [0] = fd_r;
234			async->ep.fd [1] = fd_w;
235			async->ep.len = 1;
236			async->fd_enable = 1;
237			}
238
239			async->value = SvROK (pvalue)
240			? SvREFCNT_inc_NN (SvRV (pvalue))
241			: NEWSV (0, 0);
242
243			sv_setiv (async->value, 0);
244			SvIOK_only (async->value); /* just to be sure */
245			SvREADONLY_on (async->value);
246
247			async->valuep = &(SvIVX (async->value));
248
249	root	1.11	async->autodrain = 1;
250	root	1.6	async->cb = cv;
251			async->c_cb = c_cb;
252			async->c_arg = c_arg;
253	root	1.8	async->signum = SvOK (signl) ? s_signum_croak (signl) : 0;
254	root	1.6
255			if (async->signum)
256			{
257			if (async->signum < 0)
258			croak ("Async::Interrupt::new got passed illegal signal name or number: %s", SvPV_nolen (signl));
259
260			sig_async [async->signum] = async;
261			#if _WIN32
262			signal (async->signum, async_sigsend);
263			#else
264			{
265	root	1.12	struct sigaction sa;
266	root	1.6	sa.sa_handler = async_sigsend;
267			sigfillset (&sa.sa_mask);
268	root	1.12	sa.sa_flags = 0; /* if we interrupt a syscall, we might drain the pipe before it became ready */
269	root	1.6	sigaction (async->signum, &sa, 0);
270			}
271			#endif
272			}
273	root	1.1	}
274
275			void
276	root	1.6	signal_func (async_t *async)
277	root	1.1	PPCODE:
278			EXTEND (SP, 2);
279			PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal))));
280	root	1.6	PUSHs (sv_2mortal (newSViv (PTR2IV (async))));
281	root	1.1
282	root	1.9	IV
283			c_var (async_t *async)
284			CODE:
285			RETVAL = PTR2IV (async->valuep);
286			OUTPUT:
287			RETVAL
288
289	root	1.1	void
290	root	1.9	signal (async_t *async, int value = 1)
291	root	1.1	CODE:
292	root	1.6	async_signal (async, value);
293	root	1.2
294			void
295	root	1.6	block (async_t *async)
296	root	1.2	CODE:
297	root	1.7	block (async);
298	root	1.2
299			void
300	root	1.6	unblock (async_t *async)
301	root	1.2	CODE:
302	root	1.7	unblock (async);
303	root	1.1
304			void
305	root	1.4	scope_block (SV *self)
306			CODE:
307			{
308			SV *async_sv = SvRV (self);
309	root	1.6	async_t *async = SvASYNC_nrv (async_sv);
310	root	1.7	block (async);
311	root	1.4
312			LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
313			SAVEDESTRUCTOR_X (scope_block_cb, (void *)SvREFCNT_inc (async_sv));
314			ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
315			}
316
317			void
318	root	1.6	pipe_enable (async_t *async)
319			ALIAS:
320			pipe_enable = 1
321			pipe_disable = 0
322			CODE:
323			async->fd_enable = ix;
324
325	root	1.9	int
326			pipe_fileno (async_t *async)
327			CODE:
328			if (!async->ep.len)
329			{
330			int res;
331
332			/block (async);//TODO/
333			res = s_epipe_new (&async->ep);
334			async->fd_enable = 1;
335			/unblock (async);//TODO/
336
337			if (res < 0)
338			croak ("Async::Interrupt: unable to initialize event pipe");
339			}
340
341			RETVAL = async->ep.fd [0];
342			OUTPUT:
343			RETVAL
344
345	root	1.11	int
346			pipe_autodrain (async_t *async, int enable = -1)
347			CODE:
348			RETVAL = async->autodrain;
349			if (enable >= 0)
350			async->autodrain = enable;
351			OUTPUT:
352			RETVAL
353	root	1.9
354			void
355			post_fork (async_t *async)
356			CODE:
357			if (async->ep.len)
358			{
359			int res;
360
361			/block (async);//TODO/
362			res = s_epipe_renew (&async->ep);
363			/unblock (async);//TODO/
364
365			if (res < 0)
366			croak ("Async::Interrupt: unable to initialize event pipe after fork");
367			}
368
369	root	1.6	void
370	root	1.1	DESTROY (SV *self)
371			CODE:
372			{
373			int i;
374			SV *async_sv = SvRV (self);
375	root	1.6	async_t *async = SvASYNC_nrv (async_sv);
376	root	1.1
377	root	1.2	for (i = AvFILLp (asyncs); i >= 0; --i)
378	root	1.1	if (AvARRAY (asyncs)[i] == async_sv)
379			{
380	root	1.12	AvARRAY (asyncs)[i] = AvARRAY (asyncs)[AvFILLp (asyncs)];
381			av_pop (asyncs);
382	root	1.1	goto found;
383			}
384
385			if (!PL_dirty)
386	root	1.2	warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report");
387	root	1.1
388			found:
389	root	1.6
390			if (async->signum)
391			{
392			#if _WIN32
393			signal (async->signum, SIG_DFL);
394			#else
395			{
396	root	1.12	struct sigaction sa;
397	root	1.6	sa.sa_handler = SIG_DFL;
398	root	1.12	sigemptyset (&sa.sa_mask);
399			sa.sa_flags = 0;
400	root	1.6	sigaction (async->signum, &sa, 0);
401			}
402			#endif
403			}
404
405	root	1.9	if (!async->fh_r && async->ep.len)
406			s_epipe_destroy (&async->ep);
407
408	root	1.2	SvREFCNT_dec (async->fh_r);
409			SvREFCNT_dec (async->fh_w);
410	root	1.1	SvREFCNT_dec (async->cb);
411	root	1.9	SvREFCNT_dec (async->value);
412	root	1.1
413			Safefree (async);
414			}
415
416	root	1.11	MODULE = Async::Interrupt PACKAGE = Async::Interrupt::EventPipe PREFIX = s_epipe_
417
418			void
419			new (const char *klass)
420			PPCODE:
421			{
422			s_epipe *epp;
423			SV *self;
424
425			Newz (0, epp, 1, s_epipe);
426			XPUSHs (sv_setref_iv (sv_newmortal (), klass, PTR2IV (epp)));
427
428			if (s_epipe_new (epp) < 0)
429			croak ("Async::Interrupt::EventPipe: unable to create new event pipe");
430			}
431
432			void
433			filenos (s_epipe *epp)
434			PPCODE:
435			EXTEND (SP, 2);
436			PUSHs (sv_2mortal (newSViv (epp->fd [0])));
437			PUSHs (sv_2mortal (newSViv (epp->fd [1])));
438
439			int
440			fileno (s_epipe *epp)
441			ALIAS:
442			fileno = 0
443			fileno_r = 0
444			fileno_w = 1
445			CODE:
446			RETVAL = epp->fd [ix];
447			OUTPUT:
448			RETVAL
449
450			int
451			type (s_epipe *epp)
452			CODE:
453			RETVAL = epp->len;
454			OUTPUT:
455			RETVAL
456
457			void
458			s_epipe_signal (s_epipe *epp)
459
460			void
461			s_epipe_drain (s_epipe *epp)
462
463			void
464			DESTROY (s_epipe *epp)
465			CODE:
466			s_epipe_destroy (epp);
467