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Comparing Coro/Coro/State.xs (file contents):
Revision 1.385 by root, Sat Feb 19 05:42:46 2011 UTC vs.
Revision 1.398 by root, Sat May 7 14:11:10 2011 UTC

… …
21 21
22#ifndef SVs_PADSTALE 22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0 23# define SVs_PADSTALE 0
24#endif 24#endif
25 25
26#ifdef WIN32 26#if defined(_WIN32)
27# undef HAS_GETTIMEOFDAY
27# undef setjmp 28# undef setjmp
28# undef longjmp 29# undef longjmp
29# undef _exit 30# undef _exit
30# define setjmp _setjmp /* deep magic */ 31# define setjmp _setjmp /* deep magic */
31#else 32#else
… …
125static void (*u2time)(pTHX_ UV ret[2]); 126static void (*u2time)(pTHX_ UV ret[2]);
126 127
127/* we hijack an hopefully unused CV flag for our purposes */ 128/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000 129#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX); 130static OP *pp_slf (pTHX);
131static void slf_destroy (pTHX_ struct coro *coro);
130 132
131static U32 cctx_gen; 133static U32 cctx_gen;
132static size_t cctx_stacksize = CORO_STACKSIZE; 134static size_t cctx_stacksize = CORO_STACKSIZE;
133static struct CoroAPI coroapi; 135static struct CoroAPI coroapi;
134static AV *main_mainstack; /* used to differentiate between $main and others */ 136static AV *main_mainstack; /* used to differentiate between $main and others */
… …
195 int valgrind_id; 197 int valgrind_id;
196#endif 198#endif
197 unsigned char flags; 199 unsigned char flags;
198} coro_cctx; 200} coro_cctx;
199 201
200coro_cctx *cctx_current; /* the currently running cctx */ 202static coro_cctx *cctx_current; /* the currently running cctx */
201 203
202/*****************************************************************************/ 204/*****************************************************************************/
203 205
204enum { 206enum {
205 CF_RUNNING = 0x0001, /* coroutine is running */ 207 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */ 208 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */ 209 CF_NEW = 0x0004, /* has never been switched to */
208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 210 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */ 211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
210}; 213};
211 214
212/* the structure where most of the perl state is stored, overlaid on the cxstack */ 215/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct 216typedef struct
214{ 217{
… …
220#define VAR(name,type) type name; 223#define VAR(name,type) type name;
221# include "state.h" 224# include "state.h"
222#undef VAR 225#undef VAR
223} perl_slots; 226} perl_slots;
224 227
228// how many context stack entries do we need for perl_slots
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226 230
227/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
228struct coro { 232struct coro {
229 /* the C coroutine allocated to this perl coroutine, if any */ 233 /* the C coroutine allocated to this perl coroutine, if any */
… …
240 CV *startcv; /* the CV to execute */ 244 CV *startcv; /* the CV to execute */
241 AV *args; /* data associated with this coroutine (initial args) */ 245 AV *args; /* data associated with this coroutine (initial args) */
242 int refcnt; /* coroutines are refcounted, yes */ 246 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */ 247 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */ 248 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
246 249
247 /* statistics */ 250 /* statistics */
248 int usecount; /* number of transfers to this coro */ 251 int usecount; /* number of transfers to this coro */
249 252
250 /* coro process data */ 253 /* coro process data */
… …
274typedef struct coro *Coro__State; 277typedef struct coro *Coro__State;
275typedef struct coro *Coro__State_or_hashref; 278typedef struct coro *Coro__State_or_hashref;
276 279
277/* the following variables are effectively part of the perl context */ 280/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */ 281/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */ 282/* the main reason we don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */ 283static struct CoroSLF slf_frame; /* the current slf frame */
281 284
282/** Coro ********************************************************************/ 285/** Coro ********************************************************************/
283 286
284#define CORO_PRIO_MAX 3 287#define CORO_PRIO_MAX 3
… …
290 293
291/* for Coro.pm */ 294/* for Coro.pm */
292static SV *coro_current; 295static SV *coro_current;
293static SV *coro_readyhook; 296static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */ 297static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate; 298static CV *cv_coro_run;
296static struct coro *coro_first; 299static struct coro *coro_first;
297#define coro_nready coroapi.nready 300#define coro_nready coroapi.nready
298 301
299/** Coro::Select ************************************************************/ 302/** Coro::Select ************************************************************/
300 303
… …
313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */ 316 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
314 PL_op->op_flags |= OPf_STACKED; 317 PL_op->op_flags |= OPf_STACKED;
315 PL_op->op_private = 0; 318 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX); 319 return PL_ppaddr [OP_ENTERSUB](aTHX);
317} 320}
321
322/** time stuff **************************************************************/
323
324#ifdef HAS_GETTIMEOFDAY
325
326static void
327coro_u2time (pTHX_ UV ret[2])
328{
329 struct timeval tv;
330 gettimeofday (&tv, 0);
331
332 ret [0] = tv.tv_sec;
333 ret [1] = tv.tv_usec;
334}
335
336static double
337coro_nvtime ()
338{
339 struct timeval tv;
340 gettimeofday (&tv, 0);
341
342 return tv.tv_sec + tv.tv_usec * 1e-6;
343}
344
345static void
346time_init (pTHX)
347{
348 nvtime = coro_nvtime;
349 u2time = coro_u2time;
350}
351
352#else
353
354static void
355time_init (pTHX)
356{
357 SV **svp;
358
359 require_pv ("Time/HiRes.pm");
360
361 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
362
363 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
364 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
365
366 nvtime = INT2PTR (double (*)(), SvIV (*svp));
367
368 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
369 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
370}
371
372#endif
318 373
319/** lowlevel stuff **********************************************************/ 374/** lowlevel stuff **********************************************************/
320 375
321static SV * 376static SV *
322coro_get_sv (pTHX_ const char *name, int create) 377coro_get_sv (pTHX_ const char *name, int create)
… …
744 799
745 PUTBACK; 800 PUTBACK;
746 } 801 }
747 802
748 /* allocate some space on the context stack for our purposes */ 803 /* allocate some space on the context stack for our purposes */
749 /* we manually unroll here, as usually 2 slots is enough */ 804 if (expect_false (cxstack_ix + SLOT_COUNT >= cxstack_max))
750 if (SLOT_COUNT >= 1) CXINC;
751 if (SLOT_COUNT >= 2) CXINC;
752 if (SLOT_COUNT >= 3) CXINC;
753 { 805 {
754 unsigned int i; 806 unsigned int i;
807
755 for (i = 3; i < SLOT_COUNT; ++i) 808 for (i = 0; i < SLOT_COUNT; ++i)
756 CXINC; 809 CXINC;
757 } 810
758 cxstack_ix -= SLOT_COUNT; /* undo allocation */ 811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
812 }
759 813
760 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
761 815
762 { 816 {
763 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
… …
784# define coro_init_stacks(thx) init_stacks () 838# define coro_init_stacks(thx) init_stacks ()
785#else 839#else
786static void 840static void
787coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
788{ 842{
789 PL_curstackinfo = new_stackinfo(32, 8); 843 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
790 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
791 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
792 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
793 847
794 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
… …
1100destroy_perl (pTHX_ struct coro *coro) 1154destroy_perl (pTHX_ struct coro *coro)
1101{ 1155{
1102 SV *svf [9]; 1156 SV *svf [9];
1103 1157
1104 { 1158 {
1159 SV *old_current = SvRV (coro_current);
1105 struct coro *current = SvSTATE_current; 1160 struct coro *current = SvSTATE (old_current);
1106 1161
1107 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack)); 1162 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1108 1163
1109 save_perl (aTHX_ current); 1164 save_perl (aTHX_ current);
1165
1166 /* this will cause transfer_check to croak on block*/
1167 SvRV_set (coro_current, (SV *)coro->hv);
1168
1110 load_perl (aTHX_ coro); 1169 load_perl (aTHX_ coro);
1111 1170
1112 coro_unwind_stacks (aTHX); 1171 coro_unwind_stacks (aTHX);
1113 coro_destruct_stacks (aTHX); 1172 coro_destruct_stacks (aTHX);
1114 1173
… …
1124 svf [5] = GvSV (irsgv); 1183 svf [5] = GvSV (irsgv);
1125 svf [6] = (SV *)GvHV (PL_hintgv); 1184 svf [6] = (SV *)GvHV (PL_hintgv);
1126 svf [7] = PL_diehook; 1185 svf [7] = PL_diehook;
1127 svf [8] = PL_warnhook; 1186 svf [8] = PL_warnhook;
1128 assert (9 == sizeof (svf) / sizeof (*svf)); 1187 assert (9 == sizeof (svf) / sizeof (*svf));
1188
1189 SvRV_set (coro_current, old_current);
1129 1190
1130 load_perl (aTHX_ current); 1191 load_perl (aTHX_ current);
1131 } 1192 }
1132 1193
1133 { 1194 {
… …
1443cctx_destroy (coro_cctx *cctx) 1504cctx_destroy (coro_cctx *cctx)
1444{ 1505{
1445 if (!cctx) 1506 if (!cctx)
1446 return; 1507 return;
1447 1508
1448 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary? 1509 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1449 1510
1450 --cctx_count; 1511 --cctx_count;
1451 coro_destroy (&cctx->cctx); 1512 coro_destroy (&cctx->cctx);
1452 1513
1453 /* coro_transfer creates new, empty cctx's */ 1514 /* coro_transfer creates new, empty cctx's */
… …
1612#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1673#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1613#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1674#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1614 1675
1615/** high level stuff ********************************************************/ 1676/** high level stuff ********************************************************/
1616 1677
1617static int 1678static void
1618coro_state_destroy (pTHX_ struct coro *coro) 1679coro_state_destroy (pTHX_ struct coro *coro)
1619{ 1680{
1620 if (coro->flags & CF_DESTROYED) 1681 if (coro->flags & CF_DESTROYED)
1621 return 0; 1682 return;
1622 1683
1623 if (coro->on_destroy && !PL_dirty)
1624 coro->on_destroy (aTHX_ coro); 1684 slf_destroy (aTHX_ coro);
1625 1685
1626 coro->flags |= CF_DESTROYED; 1686 coro->flags |= CF_DESTROYED;
1627 1687
1628 if (coro->flags & CF_READY) 1688 if (coro->flags & CF_READY)
1629 { 1689 {
… …
1647 cctx_destroy (coro->cctx); 1707 cctx_destroy (coro->cctx);
1648 SvREFCNT_dec (coro->startcv); 1708 SvREFCNT_dec (coro->startcv);
1649 SvREFCNT_dec (coro->args); 1709 SvREFCNT_dec (coro->args);
1650 SvREFCNT_dec (coro->swap_sv); 1710 SvREFCNT_dec (coro->swap_sv);
1651 SvREFCNT_dec (CORO_THROW); 1711 SvREFCNT_dec (CORO_THROW);
1652
1653 return 1;
1654} 1712}
1655 1713
1656static int 1714static int
1657coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1715coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1658{ 1716{
… …
1955 2013
1956static void 2014static void
1957coro_call_on_destroy (pTHX_ struct coro *coro) 2015coro_call_on_destroy (pTHX_ struct coro *coro)
1958{ 2016{
1959 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0); 2017 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1960 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1961 2018
1962 if (on_destroyp) 2019 if (on_destroyp)
1963 { 2020 {
1964 AV *on_destroy = (AV *)SvRV (*on_destroyp); 2021 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2022 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2023 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
1965 2024
1966 while (AvFILLp (on_destroy) >= 0) 2025 while (AvFILLp (on_destroy) >= 0)
1967 { 2026 {
1968 dSP; /* don't disturb outer sp */ 2027 dSP; /* don't disturb outer sp */
1969 SV *cb = av_pop (on_destroy); 2028 SV *cb = av_pop (on_destroy);
… …
1971 PUSHMARK (SP); 2030 PUSHMARK (SP);
1972 2031
1973 if (statusp) 2032 if (statusp)
1974 { 2033 {
1975 int i; 2034 int i;
1976 AV *status = (AV *)SvRV (*statusp);
1977 EXTEND (SP, AvFILLp (status) + 1); 2035 EXTEND (SP, AvFILLp (status) + 1);
1978 2036
1979 for (i = 0; i <= AvFILLp (status); ++i) 2037 for (i = 0; i <= AvFILLp (status); ++i)
1980 PUSHs (AvARRAY (status)[i]); 2038 PUSHs (AvARRAY (status)[i]);
1981 } 2039 }
… …
1985 } 2043 }
1986 } 2044 }
1987} 2045}
1988 2046
1989static void 2047static void
1990slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2048coro_set_status (pTHX_ HV *coro_hv, SV **arg, int items)
1991{ 2049{
1992 int i;
1993 HV *hv = (HV *)SvRV (coro_current);
1994 AV *av = newAV (); 2050 AV *av = newAV ();
1995 2051
1996 /* items are actually not so common, so optimise for this case */ 2052 /* items are actually not so common, so optimise for this case */
1997 if (items) 2053 if (items)
1998 { 2054 {
2055 int i;
2056
1999 av_extend (av, items - 1); 2057 av_extend (av, items - 1);
2000 2058
2001 for (i = 0; i < items; ++i) 2059 for (i = 0; i < items; ++i)
2002 av_push (av, SvREFCNT_inc_NN (arg [i])); 2060 av_push (av, SvREFCNT_inc_NN (arg [i]));
2003 } 2061 }
2004 2062
2005 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0); 2063 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2064}
2006 2065
2066static void
2067slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2068{
2007 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */ 2069 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2008 api_ready (aTHX_ sv_manager); 2070 api_ready (aTHX_ sv_manager);
2009 2071
2010 frame->prepare = prepare_schedule; 2072 frame->prepare = prepare_schedule;
2011 frame->check = slf_check_repeat; 2073 frame->check = slf_check_repeat;
2012 2074
2013 /* as a minor optimisation, we could unwind all stacks here */ 2075 /* as a minor optimisation, we could unwind all stacks here */
2014 /* but that puts extra pressure on pp_slf, and is not worth much */ 2076 /* but that puts extra pressure on pp_slf, and is not worth much */
2015 /*coro_unwind_stacks (aTHX);*/ 2077 /*coro_unwind_stacks (aTHX);*/
2078}
2079
2080static void
2081slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 HV *coro_hv = (HV *)SvRV (coro_current);
2084
2085 coro_set_status (aTHX_ coro_hv, arg, items);
2086 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2087}
2088
2089static void
2090slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2091{
2092 HV *coro_hv;
2093 struct coro *coro;
2094
2095 if (items <= 0)
2096 croak ("Coro::cancel called without coro object,");
2097
2098 coro = SvSTATE (arg [0]);
2099 coro_hv = coro->hv;
2100
2101 coro_set_status (aTHX_ coro_hv, arg + 1, items - 1);
2102
2103 if (expect_false (coro->flags & CF_NOCANCEL))
2104 {
2105 /* coro currently busy cancelling something, so just notify it */
2106 coro->slf_frame.data = (void *)coro;
2107
2108 frame->prepare = prepare_nop;
2109 frame->check = slf_check_nop;
2110 }
2111 else if (coro_hv == (HV *)SvRV (coro_current))
2112 {
2113 /* cancelling the current coro is allowed, and equals terminate */
2114 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2115 }
2116 else
2117 {
2118 struct coro *self = SvSTATE_current;
2119
2120 /* otherwise we cancel directly, purely for speed reasons
2121 * unfortunately, this requires some magic trickery, as
2122 * somebody else could cancel us, so we have to fight the cancellation.
2123 * this is ugly, and hopefully fully worth the extra speed.
2124 * besides, I can't get the slow-but-safe version working...
2125 */
2126 slf_frame.data = 0;
2127 self->flags |= CF_NOCANCEL;
2128
2129 coro_state_destroy (aTHX_ coro);
2130 coro_call_on_destroy (aTHX_ coro);
2131
2132 self->flags &= ~CF_NOCANCEL;
2133
2134 if (slf_frame.data)
2135 {
2136 /* while we were busy we have been cancelled, so terminate */
2137 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2138 }
2139 else
2140 {
2141 frame->prepare = prepare_nop;
2142 frame->check = slf_check_nop;
2143 }
2144 }
2145}
2146
2147static int
2148slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2149{
2150 frame->prepare = 0;
2151 coro_unwind_stacks (aTHX);
2152
2153 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2154
2155 return 1;
2156}
2157
2158static int
2159safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2160{
2161 if (coro->cctx)
2162 croak ("coro inside C callback, unable to cancel at this time, caught");
2163
2164 if (coro->flags & CF_NEW)
2165 {
2166 coro_set_status (aTHX_ coro->hv, arg, items);
2167 coro_state_destroy (aTHX_ coro);
2168 coro_call_on_destroy (aTHX_ coro);
2169 }
2170 else
2171 {
2172 if (!coro->slf_frame.prepare)
2173 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2174
2175 slf_destroy (aTHX_ coro);
2176
2177 coro_set_status (aTHX_ coro->hv, arg, items);
2178 coro->slf_frame.prepare = prepare_nop;
2179 coro->slf_frame.check = slf_check_safe_cancel;
2180
2181 api_ready (aTHX_ coro->hv);
2182 }
2183
2184 return 1;
2016} 2185}
2017 2186
2018/*****************************************************************************/ 2187/*****************************************************************************/
2019/* async pool handler */ 2188/* async pool handler */
2020 2189
… …
2060 coro->saved_deffh = 0; 2229 coro->saved_deffh = 0;
2061 2230
2062 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss) 2231 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2063 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2232 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2064 { 2233 {
2065 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate); 2234 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2066 coro->invoke_av = newAV (); 2235 return;
2067
2068 frame->prepare = prepare_nop;
2069 } 2236 }
2070 else 2237 else
2071 { 2238 {
2072 av_clear (GvAV (PL_defgv)); 2239 av_clear (GvAV (PL_defgv));
2073 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0); 2240 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
… …
2296static void 2463static void
2297slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2464slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{ 2465{
2299 frame->prepare = prepare_cede_notself; 2466 frame->prepare = prepare_cede_notself;
2300 frame->check = slf_check_nop; 2467 frame->check = slf_check_nop;
2468}
2469
2470/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2471static void
2472slf_destroy (pTHX_ struct coro *coro)
2473{
2474 /* this callback is reserved for slf functions needing to do cleanup */
2475 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2476 coro->slf_frame.destroy (aTHX_ coro);
2477
2478 /*
2479 * The on_destroy above most likely is from an SLF call.
2480 * Since by definition the SLF call will not finish when we destroy
2481 * the coro, we will have to force-finish it here, otherwise
2482 * cleanup functions cannot call SLF functions.
2483 */
2484 coro->slf_frame.prepare = 0;
2301} 2485}
2302 2486
2303/* 2487/*
2304 * these not obviously related functions are all rolled into one 2488 * these not obviously related functions are all rolled into one
2305 * function to increase chances that they all will call transfer with the same 2489 * function to increase chances that they all will call transfer with the same
… …
2631 SvREFCNT_dec (cb); 2815 SvREFCNT_dec (cb);
2632 } 2816 }
2633} 2817}
2634 2818
2635static void 2819static void
2636coro_semaphore_on_destroy (pTHX_ struct coro *coro) 2820coro_semaphore_destroy (pTHX_ struct coro *coro)
2637{ 2821{
2638 /* call $sem->adjust (0) to possibly wake up some other waiters */ 2822 /* call $sem->adjust (0) to possibly wake up some other waiters */
2639 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0); 2823 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2640} 2824}
2641 2825
… …
2648 /* if we are about to throw, don't actually acquire the lock, just throw */ 2832 /* if we are about to throw, don't actually acquire the lock, just throw */
2649 if (CORO_THROW) 2833 if (CORO_THROW)
2650 return 0; 2834 return 0;
2651 else if (SvIVX (count_sv) > 0) 2835 else if (SvIVX (count_sv) > 0)
2652 { 2836 {
2653 SvSTATE_current->on_destroy = 0; 2837 frame->destroy = 0;
2654 2838
2655 if (acquire) 2839 if (acquire)
2656 SvIVX (count_sv) = SvIVX (count_sv) - 1; 2840 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2657 else 2841 else
2658 coro_semaphore_adjust (aTHX_ av, 0); 2842 coro_semaphore_adjust (aTHX_ av, 0);
… …
2701 { 2885 {
2702 av_push (av, SvREFCNT_inc (SvRV (coro_current))); 2886 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2703 2887
2704 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av)); 2888 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2705 frame->prepare = prepare_schedule; 2889 frame->prepare = prepare_schedule;
2706
2707 /* to avoid race conditions when a woken-up coro gets terminated */ 2890 /* to avoid race conditions when a woken-up coro gets terminated */
2708 /* we arrange for a temporary on_destroy that calls adjust (0) */ 2891 /* we arrange for a temporary on_destroy that calls adjust (0) */
2709 SvSTATE_current->on_destroy = coro_semaphore_on_destroy; 2892 frame->destroy = coro_semaphore_destroy;
2710 } 2893 }
2711} 2894}
2712 2895
2713static void 2896static void
2714slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items) 2897slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
… …
3109 coroapi.prepare_nop = prepare_nop; 3292 coroapi.prepare_nop = prepare_nop;
3110 coroapi.prepare_schedule = prepare_schedule; 3293 coroapi.prepare_schedule = prepare_schedule;
3111 coroapi.prepare_cede = prepare_cede; 3294 coroapi.prepare_cede = prepare_cede;
3112 coroapi.prepare_cede_notself = prepare_cede_notself; 3295 coroapi.prepare_cede_notself = prepare_cede_notself;
3113 3296
3114 { 3297 time_init (aTHX);
3115 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3116
3117 if (!svp) croak ("Time::HiRes is required");
3118 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3119
3120 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3121
3122 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3123 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3124 }
3125 3298
3126 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL)); 3299 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3127} 3300}
3128 3301
3129SV * 3302SV *
… …
3138void 3311void
3139transfer (...) 3312transfer (...)
3140 PROTOTYPE: $$ 3313 PROTOTYPE: $$
3141 CODE: 3314 CODE:
3142 CORO_EXECUTE_SLF_XS (slf_init_transfer); 3315 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3143
3144bool
3145_destroy (SV *coro_sv)
3146 CODE:
3147 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3148 OUTPUT:
3149 RETVAL
3150 3316
3151void 3317void
3152_exit (int code) 3318_exit (int code)
3153 PROTOTYPE: $ 3319 PROTOTYPE: $
3154 CODE: 3320 CODE:
… …
3230 CODE: 3396 CODE:
3231{ 3397{
3232 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot)) 3398 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3233 { 3399 {
3234 struct coro *current = SvSTATE_current; 3400 struct coro *current = SvSTATE_current;
3401 struct CoroSLF slf_save;
3235 3402
3236 if (current != coro) 3403 if (current != coro)
3237 { 3404 {
3238 PUTBACK; 3405 PUTBACK;
3239 save_perl (aTHX_ current); 3406 save_perl (aTHX_ current);
3240 load_perl (aTHX_ coro); 3407 load_perl (aTHX_ coro);
3408 /* the coro is most likely in an active SLF call.
3409 * while not strictly required (the code we execute is
3410 * not allowed to call any SLF functions), it's cleaner
3411 * to reinitialise the slf_frame and restore it later.
3412 * This might one day allow us to actually do SLF calls
3413 * from code executed here.
3414 */
3415 slf_save = slf_frame;
3416 slf_frame.prepare = 0;
3241 SPAGAIN; 3417 SPAGAIN;
3242 } 3418 }
3243 3419
3244 PUSHSTACK; 3420 PUSHSTACK;
3245 3421
… …
3255 SPAGAIN; 3431 SPAGAIN;
3256 3432
3257 if (current != coro) 3433 if (current != coro)
3258 { 3434 {
3259 PUTBACK; 3435 PUTBACK;
3436 slf_frame = slf_save;
3260 save_perl (aTHX_ coro); 3437 save_perl (aTHX_ coro);
3261 load_perl (aTHX_ current); 3438 load_perl (aTHX_ current);
3262 SPAGAIN; 3439 SPAGAIN;
3263 } 3440 }
3264 } 3441 }
… …
3350 3527
3351void 3528void
3352cancel (Coro::State self) 3529cancel (Coro::State self)
3353 CODE: 3530 CODE:
3354 coro_state_destroy (aTHX_ self); 3531 coro_state_destroy (aTHX_ self);
3355 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3356
3357 3532
3358SV * 3533SV *
3359enable_times (int enabled = enable_times) 3534enable_times (int enabled = enable_times)
3360 CODE: 3535 CODE:
3361{ 3536{
… …
3417BOOT: 3592BOOT:
3418{ 3593{
3419 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3594 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3420 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3595 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3421 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD); 3596 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3422 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3423 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current); 3597 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3424 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3598 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3425 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE); 3599 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3426 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE); 3600 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3427 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE); 3601 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
… …
3466 api_ready (aTHX_ RETVAL); 3640 api_ready (aTHX_ RETVAL);
3467 OUTPUT: 3641 OUTPUT:
3468 RETVAL 3642 RETVAL
3469 3643
3470void 3644void
3645_destroy (Coro::State coro)
3646 CODE:
3647 /* used by the manager thread */
3648 coro_state_destroy (aTHX_ coro);
3649 coro_call_on_destroy (aTHX_ coro);
3650
3651void
3471terminate (...) 3652terminate (...)
3472 CODE: 3653 CODE:
3473 CORO_EXECUTE_SLF_XS (slf_init_terminate); 3654 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3655
3656void
3657cancel (...)
3658 CODE:
3659 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3660
3661int
3662safe_cancel (Coro::State self, ...)
3663 C_ARGS: aTHX_ self, &ST (1), items - 1
3474 3664
3475void 3665void
3476schedule (...) 3666schedule (...)
3477 CODE: 3667 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_schedule); 3668 CORO_EXECUTE_SLF_XS (slf_init_schedule);

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