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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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typedef volatile sig_atomic_t atomic_t; |
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|
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static int *sig_pending, *psig_pend; /* make local copies because of missing THX */ |
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static Sighandler_t old_sighandler; |
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static atomic_t async_pending; |
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|
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static int |
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extract_fd (SV *fh, int wr) |
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{ |
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int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh))); |
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|
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if (fd < 0) |
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croak ("illegal fh argument, either not an OS file or read/write mode mismatch"); |
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|
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return fd; |
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} |
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|
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static SV * |
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get_cb (SV *cb_sv) |
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{ |
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HV *st; |
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GV *gvp; |
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CV *cv; |
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|
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if (!SvOK (cb_sv)) |
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return 0; |
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|
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cv = sv_2cv (cb_sv, &st, &gvp, 0); |
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|
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if (!cv) |
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croak ("Async::Interrupt callback must be undef or a CODE reference"); |
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|
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return (SV *)cv; |
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} |
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|
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static AV *asyncs; |
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|
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struct async { |
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SV *cb; |
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void (*c_cb)(pTHX_ void *c_data, int value); |
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void *c_data; |
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SV *fh; |
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|
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int fd; |
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atomic_t value; |
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atomic_t signalled; |
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}; |
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|
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/* the main workhorse to signal */ |
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static void |
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async_signal (void *signal_arg, int value) |
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{ |
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struct async *async = (struct async *)signal_arg; |
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|
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async->value = value; |
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|
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if (!async->signalled) |
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{ |
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async->signalled = 1; |
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|
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if (async->fd >= 0) |
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write (async->fd, async, 1); |
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} |
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|
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async_pending = 1; |
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psig_pend [9] = 1; |
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*sig_pending = 1; |
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} |
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|
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static void |
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async_handle (void) |
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{ |
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async_pending = 0; |
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} |
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|
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#if defined(HAS_SIGACTION) && defined(SA_SIGINFO) |
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static Signal_t async_sighandler (int signum, siginfo_t *si, void *sarg) |
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{ |
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if (signum == 9) |
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async_handle (); |
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else |
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old_sighandler (signum, si, sarg); |
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} |
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#else |
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static Signal_t async_sighandler (int) |
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{ |
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if (signum == 9) |
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async_handle (); |
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else |
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old_sighandler (signum); |
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} |
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#endif |
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|
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|
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MODULE = Async::Interrupt PACKAGE = Async::Interrupt |
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|
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BOOT: |
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old_sighandler = PL_sighandlerp; |
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PL_sighandlerp = async_sighandler; |
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sig_pending = &PL_sig_pending; |
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psig_pend = PL_psig_pend; |
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asyncs = newAV (); |
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|
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SV * |
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_alloc (SV *cb, void *c_cb, void *c_data, SV *fh) |
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CODE: |
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{ |
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SV *cv = SvOK (cb) ? SvREFCNT_inc_NN (get_cb (cb)) : 0; |
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int fd = SvOK (fh) ? extract_fd (fh, 1) : -1; |
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|
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struct async *async; |
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Newz (0, async, 1, struct async); |
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|
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async->fh = fd >= 0 ? newSVsv (fh) : 0; |
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async->fd = fd; |
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async->cb = cb; |
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async->c_cb = c_cb; |
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async->c_data = c_data; |
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|
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RETVAL = newSViv (PTR2IV (async)); |
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av_push (asyncs, RETVAL); |
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|
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RETVAL = newRV_noinc (RETVAL); |
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} |
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OUTPUT: |
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RETVAL |
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|
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void |
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signal_cb (SV *self) |
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PPCODE: |
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EXTEND (SP, 2); |
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PUSHs (sv_2mortal (newSViv (PTR2IV (async_signal)))); |
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PUSHs (sv_2mortal (newSViv (SvIV (SvRV (self))))); |
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|
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void |
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signal (SV *self, int value = 0) |
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CODE: |
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async_signal (INT2PTR (void *, SvIV (SvRV (self))), value); |
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|
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void |
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DESTROY (SV *self) |
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CODE: |
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{ |
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int i; |
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SV *async_sv = SvRV (self); |
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struct async *async = INT2PTR (struct async *, SvIV (async_sv)); |
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|
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for (i = AvFILLp (asyncs); i > 0; --i) |
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if (AvARRAY (asyncs)[i] == async_sv) |
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{ |
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if (i < AvFILLp (asyncs)) |
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AvARRAY (asyncs)[i] == AvARRAY (asyncs)[AvFILLp (asyncs)]; |
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|
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assert (av_pop (asyncs) == async_sv); |
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goto found; |
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} |
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|
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if (!PL_dirty) |
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warn ("Async::Interrupt::DESTROY could not find async object in list of asyncs, please report!"); |
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|
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found: |
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SvREFCNT_dec (async->fh); |
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SvREFCNT_dec (async->cb); |
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|
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Safefree (async); |
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} |
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|
