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;
  ANY *scope_savestack;
  volatile int blocked;

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

static void async_signal (void *signal_arg, int value);

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

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

/* 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;

  if (async->hysteresis)
    setsig (async->signum, SIG_IGN);

  *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;

  /* restore signal */
  if (async->hysteresis)
    setsig (async->signum, async_sigsend);

  /* 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

#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);

  async->scope_savestack = 0;
  unblock (async);
  SvREFCNT_dec (async_sv);
}

static void
scope_block (SV *async_sv)
{
  async_t *async = SvASYNC_nrv (async_sv);

  /* as a heuristic, we skip the scope block if we already are blocked */
  /* and the existing scope block used the same savestack */

  if (!async->scope_savestack || async->scope_savestack != PL_savestack)
    {
      async->scope_savestack = PL_savestack;
      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 */
    }
}

#endif
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;
            setsig (async->signum, async_sigsend);
          }
}

void
signal_hysteresis (async_t *async, int enable)
        CODE:
        async->hysteresis = enable;

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

void
scope_block_func (SV *self)
        PPCODE:
        EXTEND (SP, 2);
        PUSHs (sv_2mortal (newSViv (PTR2IV (scope_block))));
        PUSHs (sv_2mortal (newSViv (PTR2IV (SvRV (self)))));

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:
        scope_block (SvRV (self));

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)
          setsig (async->signum, SIG_DFL);

        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:	1.13
Committed:	Tue Jul 28 01:19:44 2009 UTC (14 years, 10 months ago) by root
Branch:	MAIN
Changes since 1.12:	+67 -39 lines
Log Message:	* empty log message *
#	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	1.13	ANY *scope_savestack;
38	root	1.7	volatile int blocked;
39	root	1.1
40	root	1.9	s_epipe ep;
41	root	1.6	int fd_wlen;
42			atomic_t fd_enable;
43	root	1.2	atomic_t pending;
44	root	1.9	volatile IV *valuep;
45	root	1.13	atomic_t hysteresis;
46	root	1.6	} async_t;
47
48			static AV *asyncs;
49			static async_t *sig_async [SIG_SIZE];
50
51			#define SvASYNC_nrv(sv) INT2PTR (async_t *, SvIVX (sv))
52			#define SvASYNC(rv) SvASYNC_nrv (SvRV (rv))
53	root	1.1
54	root	1.13	static void async_signal (void *signal_arg, int value);
55
56			static void
57			setsig (int signum, void (*handler)(int))
58			{
59			#if _WIN32
60			signal (async->signum, handler);
61			#else
62			struct sigaction sa;
63			sa.sa_handler = handler;
64			sigfillset (&sa.sa_mask);
65			sa.sa_flags = 0; /* if we interrupt a syscall, we might drain the pipe before it became ready */
66			sigaction (signum, &sa, 0);
67			}
68
69			static void
70			async_sigsend (int signum)
71			{
72			async_signal (sig_async [signum], 0);
73			}
74
75	root	1.1	/* the main workhorse to signal */
76			static void
77			async_signal (void *signal_arg, int value)
78			{
79	root	1.6	static char pipedata [8];
80
81			async_t async = (async_t )signal_arg;
82	root	1.2	int pending = async->pending;
83	root	1.1
84	root	1.13	if (async->hysteresis)
85			setsig (async->signum, SIG_IGN);
86
87	root	1.9	*async->valuep = value ? value : 1;
88	root	1.2	async->pending = 1;
89			async_pending = 1;
90			psig_pend [9] = 1;
91			*sig_pending = 1;
92	root	1.1
93	root	1.10	if (!pending && async->fd_enable && async->ep.len)
94			s_epipe_signal (&async->ep);
95	root	1.2	}
96
97			static void
98	root	1.6	handle_async (async_t *async)
99	root	1.2	{
100			int old_errno = errno;
101	root	1.9	int value = *async->valuep;
102	root	1.2
103	root	1.9	*async->valuep = 0;
104	root	1.2	async->pending = 0;
105
106	root	1.13	/* restore signal */
107			if (async->hysteresis)
108			setsig (async->signum, async_sigsend);
109
110	root	1.2	/* drain pipe */
111	root	1.11	if (async->fd_enable && async->ep.len && async->autodrain)
112	root	1.9	s_epipe_drain (&async->ep);
113	root	1.2
114			if (async->c_cb)
115			{
116			dTHX;
117			async->c_cb (aTHX_ async->c_arg, value);
118			}
119
120			if (async->cb)
121			{
122			dSP;
123
124			SV *saveerr = SvOK (ERRSV) ? sv_mortalcopy (ERRSV) : 0;
125			SV *savedie = PL_diehook;
126
127			PL_diehook = 0;
128
129			PUSHSTACKi (PERLSI_SIGNAL);
130
131			PUSHMARK (SP);
132			XPUSHs (sv_2mortal (newSViv (value)));
133			PUTBACK;
134			call_sv (async->cb, G_VOID \| G_DISCARD \| G_EVAL);
135
136			if (SvTRUE (ERRSV))
137			{
138			SPAGAIN;
139
140			PUSHMARK (SP);
141			PUTBACK;
142			call_sv (get_sv ("Async::Interrupt::DIED", 1), G_VOID \| G_DISCARD \| G_EVAL \| G_KEEPERR);
143
144			sv_setpvn (ERRSV, "", 0);
145			}
146
147			if (saveerr)
148			sv_setsv (ERRSV, saveerr);
149	root	1.1
150	root	1.2	{
151			SV *oldhook = PL_diehook;
152			PL_diehook = savedie;
153			SvREFCNT_dec (oldhook);
154			}
155
156			POPSTACK;
157	root	1.1	}
158
159	root	1.2	errno = old_errno;
160	root	1.1	}
161
162			static void
163	root	1.2	handle_asyncs (void)
164	root	1.1	{
165	root	1.2	int i;
166
167	root	1.1	async_pending = 0;
168	root	1.2
169			for (i = AvFILLp (asyncs); i >= 0; --i)
170			{
171	root	1.12	SV *async_sv = AvARRAY (asyncs)[i];
172			async_t *async = SvASYNC_nrv (async_sv);
173	root	1.2
174			if (async->pending && !async->blocked)
175	root	1.12	{
176			/* temporarily keep a refcount */
177			SvREFCNT_inc (async_sv);
178			handle_async (async);
179			SvREFCNT_dec (async_sv);
180
181			/* the handler could have deleted any number of asyncs */
182			if (i > AvFILLp (asyncs))
183			i = AvFILLp (asyncs);
184			}
185	root	1.2	}
186	root	1.1	}
187
188	root	1.5	#if HAS_SA_SIGINFO
189	root	1.1	static Signal_t async_sighandler (int signum, siginfo_t si, void sarg)
190			{
191			if (signum == 9)
192	root	1.2	handle_asyncs ();
193	root	1.1	else
194			old_sighandler (signum, si, sarg);
195			}
196			#else
197	root	1.3	static Signal_t async_sighandler (int signum)
198	root	1.1	{
199			if (signum == 9)
200	root	1.3	handle_asyncs ();
201	root	1.1	else
202			old_sighandler (signum);
203			}
204			#endif
205
206	root	1.7	#define block(async) ++(async)->blocked
207
208	root	1.6	static void
209	root	1.7	unblock (async_t *async)
210	root	1.4	{
211			--async->blocked;
212			if (async->pending && !async->blocked)
213			handle_async (async);
214	root	1.7	}
215	root	1.4
216	root	1.7	static void
217			scope_block_cb (pTHX_ void *async_sv)
218			{
219			async_t async = SvASYNC_nrv ((SV )async_sv);
220	root	1.13
221			async->scope_savestack = 0;
222	root	1.7	unblock (async);
223	root	1.4	SvREFCNT_dec (async_sv);
224			}
225	root	1.1
226	root	1.13	static void
227			scope_block (SV *async_sv)
228			{
229			async_t *async = SvASYNC_nrv (async_sv);
230
231			/* as a heuristic, we skip the scope block if we already are blocked */
232			/* and the existing scope block used the same savestack */
233
234			if (!async->scope_savestack \|\| async->scope_savestack != PL_savestack)
235			{
236			async->scope_savestack = PL_savestack;
237			block (async);
238
239			LEAVE; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
240			SAVEDESTRUCTOR_X (scope_block_cb, (void *)SvREFCNT_inc (async_sv));
241			ENTER; /* unfortunately, perl sandwiches XS calls into ENTER/LEAVE */
242			}
243			}
244
245			#endif
246	root	1.1	MODULE = Async::Interrupt PACKAGE = Async::Interrupt
247
248			BOOT:
249			old_sighandler = PL_sighandlerp;
250			PL_sighandlerp = async_sighandler;
251			sig_pending = &PL_sig_pending;
252			psig_pend = PL_psig_pend;
253			asyncs = newAV ();
254	root	1.4	CvNODEBUG_on (get_cv ("Async::Interrupt::scope_block", 0)); /* otherwise calling scope can be the debugger */
255	root	1.1
256	root	1.3	PROTOTYPES: DISABLE
257
258	root	1.6	void
259	root	1.9	_alloc (SV cb, void c_cb, void c_arg, SV fh_r, SV fh_w, SV signl, SV *pvalue)
260	root	1.6	PPCODE:
261	root	1.1	{
262	root	1.8	SV *cv = SvOK (cb) ? SvREFCNT_inc (s_get_cv_croak (cb)) : 0;
263	root	1.6	async_t *async;
264	root	1.1
265	root	1.6	Newz (0, async, 1, async_t);
266	root	1.1
267	root	1.6	XPUSHs (sv_2mortal (newSViv (PTR2IV (async))));
268	root	1.9	/* TODO: need to bless right now to ensure deallocation */
269	root	1.6	av_push (asyncs, TOPs);
270	root	1.2
271	root	1.9	SvGETMAGIC (fh_r); SvGETMAGIC (fh_w);
272			if (SvOK (fh_r) \|\| SvOK (fh_w))
273			{
274			int fd_r = s_fileno_croak (fh_r, 0);
275			int fd_w = s_fileno_croak (fh_w, 1);
276
277			async->fh_r = newSVsv (fh_r);
278			async->fh_w = newSVsv (fh_w);
279			async->ep.fd [0] = fd_r;
280			async->ep.fd [1] = fd_w;
281			async->ep.len = 1;
282			async->fd_enable = 1;
283			}
284
285			async->value = SvROK (pvalue)
286			? SvREFCNT_inc_NN (SvRV (pvalue))
287			: NEWSV (0, 0);
288
289			sv_setiv (async->value, 0);
290			SvIOK_only (async->value); /* just to be sure */
291			SvREADONLY_on (async->value);
292
293			async->valuep = &(SvIVX (async->value));
294
295	root	1.11	async->autodrain = 1;
296	root	1.6	async->cb = cv;
297			async->c_cb = c_cb;
298			async->c_arg = c_arg;
299	root	1.8	async->signum = SvOK (signl) ? s_signum_croak (signl) : 0;
300	root	1.6
301			if (async->signum)
302			{
303			if (async->signum < 0)
304			croak ("Async::Interrupt::new got passed illegal signal name or number: %s", SvPV_nolen (signl));
305
306			sig_async [async->signum] = async;
307	root	1.13	setsig (async->signum, async_sigsend);
308	root	1.6	}
309	root	1.1	}
310
311			void
312	root	1.13	signal_hysteresis (async_t *async, int enable)
313			CODE:
314			async->hysteresis = enable;
315
316			void
317	root	1.6	signal_func (async_t *async)
318	root	1.1	PPCODE:
319			EXTEND (SP, 2);
320			PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal))));
321	root	1.6	PUSHs (sv_2mortal (newSViv (PTR2IV (async))));
322	root	1.1
323	root	1.13	void
324			scope_block_func (SV *self)
325			PPCODE:
326			EXTEND (SP, 2);
327			PUSHs (sv_2mortal (newSViv (PTR2IV (scope_block))));
328			PUSHs (sv_2mortal (newSViv (PTR2IV (SvRV (self)))));
329
330	root	1.9	IV
331			c_var (async_t *async)
332			CODE:
333			RETVAL = PTR2IV (async->valuep);
334			OUTPUT:
335			RETVAL
336
337	root	1.1	void
338	root	1.9	signal (async_t *async, int value = 1)
339	root	1.1	CODE:
340	root	1.6	async_signal (async, value);
341	root	1.2
342			void
343	root	1.6	block (async_t *async)
344	root	1.2	CODE:
345	root	1.7	block (async);
346	root	1.2
347			void
348	root	1.6	unblock (async_t *async)
349	root	1.2	CODE:
350	root	1.7	unblock (async);
351	root	1.1
352			void
353	root	1.4	scope_block (SV *self)
354			CODE:
355	root	1.13	scope_block (SvRV (self));
356	root	1.4
357			void
358	root	1.6	pipe_enable (async_t *async)
359			ALIAS:
360			pipe_enable = 1
361			pipe_disable = 0
362			CODE:
363			async->fd_enable = ix;
364
365	root	1.9	int
366			pipe_fileno (async_t *async)
367			CODE:
368			if (!async->ep.len)
369			{
370			int res;
371
372			/block (async);//TODO/
373			res = s_epipe_new (&async->ep);
374			async->fd_enable = 1;
375			/unblock (async);//TODO/
376
377			if (res < 0)
378			croak ("Async::Interrupt: unable to initialize event pipe");
379			}
380
381			RETVAL = async->ep.fd [0];
382			OUTPUT:
383			RETVAL
384
385	root	1.11	int
386			pipe_autodrain (async_t *async, int enable = -1)
387			CODE:
388			RETVAL = async->autodrain;
389			if (enable >= 0)
390			async->autodrain = enable;
391			OUTPUT:
392			RETVAL
393	root	1.9
394			void
395			post_fork (async_t *async)
396			CODE:
397			if (async->ep.len)
398			{
399			int res;
400
401			/block (async);//TODO/
402			res = s_epipe_renew (&async->ep);
403			/unblock (async);//TODO/
404
405			if (res < 0)
406			croak ("Async::Interrupt: unable to initialize event pipe after fork");
407			}
408
409	root	1.6	void
410	root	1.1	DESTROY (SV *self)
411			CODE:
412			{
413			int i;
414			SV *async_sv = SvRV (self);
415	root	1.6	async_t *async = SvASYNC_nrv (async_sv);
416	root	1.1
417	root	1.2	for (i = AvFILLp (asyncs); i >= 0; --i)
418	root	1.1	if (AvARRAY (asyncs)[i] == async_sv)
419			{
420	root	1.12	AvARRAY (asyncs)[i] = AvARRAY (asyncs)[AvFILLp (asyncs)];
421			av_pop (asyncs);
422	root	1.1	goto found;
423			}
424
425			if (!PL_dirty)
426	root	1.2	warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report");
427	root	1.1
428			found:
429	root	1.6
430			if (async->signum)
431	root	1.13	setsig (async->signum, SIG_DFL);
432	root	1.6
433	root	1.9	if (!async->fh_r && async->ep.len)
434			s_epipe_destroy (&async->ep);
435
436	root	1.2	SvREFCNT_dec (async->fh_r);
437			SvREFCNT_dec (async->fh_w);
438	root	1.1	SvREFCNT_dec (async->cb);
439	root	1.9	SvREFCNT_dec (async->value);
440	root	1.1
441			Safefree (async);
442			}
443
444	root	1.11	MODULE = Async::Interrupt PACKAGE = Async::Interrupt::EventPipe PREFIX = s_epipe_
445
446			void
447			new (const char *klass)
448			PPCODE:
449			{
450			s_epipe *epp;
451			SV *self;
452
453			Newz (0, epp, 1, s_epipe);
454			XPUSHs (sv_setref_iv (sv_newmortal (), klass, PTR2IV (epp)));
455
456			if (s_epipe_new (epp) < 0)
457			croak ("Async::Interrupt::EventPipe: unable to create new event pipe");
458			}
459
460			void
461			filenos (s_epipe *epp)
462			PPCODE:
463			EXTEND (SP, 2);
464			PUSHs (sv_2mortal (newSViv (epp->fd [0])));
465			PUSHs (sv_2mortal (newSViv (epp->fd [1])));
466
467			int
468			fileno (s_epipe *epp)
469			ALIAS:
470			fileno = 0
471			fileno_r = 0
472			fileno_w = 1
473			CODE:
474			RETVAL = epp->fd [ix];
475			OUTPUT:
476			RETVAL
477
478			int
479			type (s_epipe *epp)
480			CODE:
481			RETVAL = epp->len;
482			OUTPUT:
483			RETVAL
484
485			void
486			s_epipe_signal (s_epipe *epp)
487
488			void
489			s_epipe_drain (s_epipe *epp)
490
491			void
492			DESTROY (s_epipe *epp)
493			CODE:
494			s_epipe_destroy (epp);
495