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Comparing Coro/Coro/State.xs (file contents):
Revision 1.247 by root, Wed Sep 24 21:31:29 2008 UTC vs.
Revision 1.286 by root, Mon Nov 17 04:19:49 2008 UTC

… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
58 55
59#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
81# ifndef IS_PADCONST 78# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
83# endif 80# endif
84#endif 81#endif
85 82
83/* 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
86/* 5.8.8 */ 93/* 5.8.8 */
87#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
89#endif 96#endif
90#ifndef newSV 97#ifndef newSV
91# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
92#endif 99#endif
93 100
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */ 101/* 5.8.7 */
100#ifndef SvRV_set 102#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
102#endif 104#endif
103 105
… …
114# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 117#endif
116 118
117/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */ 120 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
120#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
121 126
122#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
123 128
124#if __GNUC__ >= 3 129#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
128#else 133#else
129# define attribute(x) 134# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
132#endif 137#endif
133 138
134#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
136 141
137#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
138 143
139#include "CoroAPI.h" 144#include "CoroAPI.h"
140 145
141#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 147# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# endif
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 150#endif
149 151
150/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
151struct io_state 153struct io_state
152{ 154{
155 AV *res;
153 int errorno; 156 int errorno;
154 I32 laststype; 157 I32 laststype; /* U16 in 5.10.0 */
155 int laststatval; 158 int laststatval;
156 Stat_t statcache; 159 Stat_t statcache;
157}; 160};
158 161
159static double (*nvtime)(); /* so why doesn't it take void? */ 162static double (*nvtime)(); /* so why doesn't it take void? */
160 163
164static U32 cctx_gen;
161static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
162static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
163static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env; 168static JMPENV *main_top_env;
165static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
166static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
167 171
168static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook; 174static SV *rv_diehook;
171static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
190 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192}; 196};
193 197
194/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx { 199typedef struct coro_cctx
200{
196 struct coro_cctx *next; 201 struct coro_cctx *next;
197 202
198 /* the stack */ 203 /* the stack */
199 void *sptr; 204 void *sptr;
200 size_t ssize; 205 size_t ssize;
… …
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env; 210 JMPENV *top_env;
206 coro_context cctx; 211 coro_context cctx;
207 212
213 U32 gen;
208#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
209 int valgrind_id; 215 int valgrind_id;
210#endif 216#endif
211 unsigned char flags; 217 unsigned char flags;
212} coro_cctx; 218} coro_cctx;
… …
217 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219}; 225};
220 226
221/* the structure where most of the perl state is stored, overlaid on the cxstack */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct { 228typedef struct
229{
223 SV *defsv; 230 SV *defsv;
224 AV *defav; 231 AV *defav;
225 SV *errsv; 232 SV *errsv;
226 SV *irsgv; 233 SV *irsgv;
227#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
231 238
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233 240
234/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
235struct coro { 242struct coro {
236 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
237 coro_cctx *cctx; 244 coro_cctx *cctx;
238 245
239 /* process data */ 246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
240 AV *mainstack; 248 AV *mainstack;
241 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
242 250
243 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */ 252 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */ 254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
247 256
248 /* statistics */ 257 /* statistics */
249 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
250 259
251 /* coro process data */ 260 /* coro process data */
… …
259 struct coro *next, *prev; 268 struct coro *next, *prev;
260}; 269};
261 270
262typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
263typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278static SV *coro_throw;
264 279
265/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
266 281
267#define PRIO_MAX 3 282#define PRIO_MAX 3
268#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
272#define PRIO_MIN -4 287#define PRIO_MIN -4
273 288
274/* for Coro.pm */ 289/* for Coro.pm */
275static SV *coro_current; 290static SV *coro_current;
276static SV *coro_readyhook; 291static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
278static int coro_nready;
279static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
280 295
281/** lowlevel stuff **********************************************************/ 296/** lowlevel stuff **********************************************************/
282 297
283static SV * 298static SV *
284coro_get_sv (pTHX_ const char *name, int create) 299coro_get_sv (pTHX_ const char *name, int create)
… …
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif 340#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist); 342 --AvFILLp (padlist);
328 343
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
330 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
331 346
332 return newpadlist; 347 return newpadlist;
333} 348}
334 349
… …
377static MGVTBL coro_cv_vtbl = { 392static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0, 393 0, 0, 0, 0,
379 coro_cv_free 394 coro_cv_free
380}; 395};
381 396
382#define CORO_MAGIC(sv,type) \ 397#define CORO_MAGIC(sv, type) \
383 SvMAGIC (sv) \ 398 expect_true (SvMAGIC (sv)) \
384 ? SvMAGIC (sv)->mg_type == type \ 399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
385 ? SvMAGIC (sv) \ 400 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \ 401 : mg_find (sv, type) \
387 : 0 402 : 0
388 403
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391 406
392static struct coro * 407INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro) 408SvSTATE_ (pTHX_ SV *coro)
394{ 409{
395 HV *stash; 410 HV *stash;
396 MAGIC *mg; 411 MAGIC *mg;
397 412
… …
412 mg = CORO_MAGIC_state (coro); 427 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr; 428 return (struct coro *)mg->mg_ptr;
414} 429}
415 430
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
417 445
418/* the next two functions merely cache the padlists */ 446/* the next two functions merely cache the padlists */
419static void 447static void
420get_padlist (pTHX_ CV *cv) 448get_padlist (pTHX_ CV *cv)
421{ 449{
… …
488 CvPADLIST (cv) = (AV *)POPs; 516 CvPADLIST (cv) = (AV *)POPs;
489 } 517 }
490 518
491 PUTBACK; 519 PUTBACK;
492 } 520 }
521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
493} 524}
494 525
495static void 526static void
496save_perl (pTHX_ Coro__State c) 527save_perl (pTHX_ Coro__State c)
497{ 528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
498 { 532 {
499 dSP; 533 dSP;
500 I32 cxix = cxstack_ix; 534 I32 cxix = cxstack_ix;
501 PERL_CONTEXT *ccstk = cxstack; 535 PERL_CONTEXT *ccstk = cxstack;
502 PERL_SI *top_si = PL_curstackinfo; 536 PERL_SI *top_si = PL_curstackinfo;
… …
569 #undef VAR 603 #undef VAR
570 } 604 }
571} 605}
572 606
573/* 607/*
574 * allocate various perl stacks. This is an exact copy 608 * allocate various perl stacks. This is almost an exact copy
575 * of perl.c:init_stacks, except that it uses less memory 609 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do 610 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace. 611 * not usually need a lot of stackspace.
578 */ 612 */
579#if CORO_PREFER_PERL_FUNCTIONS 613#if CORO_PREFER_PERL_FUNCTIONS
… …
622 656
623/* 657/*
624 * destroy the stacks, the callchain etc... 658 * destroy the stacks, the callchain etc...
625 */ 659 */
626static void 660static void
627coro_destroy_stacks (pTHX) 661coro_destruct_stacks (pTHX)
628{ 662{
629 while (PL_curstackinfo->si_next) 663 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next; 664 PL_curstackinfo = PL_curstackinfo->si_next;
631 665
632 while (PL_curstackinfo) 666 while (PL_curstackinfo)
… …
781 815
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783} 817}
784 818
785static void 819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
786coro_setup (pTHX_ struct coro *coro) 833coro_setup (pTHX_ struct coro *coro)
787{ 834{
788 /* 835 /*
789 * emulate part of the perl startup here. 836 * emulate part of the perl startup here.
790 */ 837 */
… …
810 GvSV (PL_defgv) = newSV (0); 857 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0; 858 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0); 859 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv)); 861 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
816 863
817 { 864 {
818 dSP; 865 dSP;
819 LOGOP myop; 866 UNOP myop;
820 867
821 Zero (&myop, 1, LOGOP); 868 Zero (&myop, 1, UNOP);
822 myop.op_next = Nullop; 869 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID; 870 myop.op_flags = OPf_WANT_VOID;
824 871
825 PUSHMARK (SP); 872 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN; 877 SPAGAIN;
831 } 878 }
832 879
833 /* this newly created coroutine might be run on an existing cctx which most 880 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub. 881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */ 882 */
838 ENTER; 883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
839} 884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
840 885
886 coro_throw = coro->throw;
887}
888
841static void 889static void
842coro_destroy (pTHX_ struct coro *coro) 890coro_destruct (pTHX_ struct coro *coro)
843{ 891{
844 if (!IN_DESTRUCT) 892 if (!IN_DESTRUCT)
845 { 893 {
846 /* restore all saved variables and stuff */ 894 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0); 895 LEAVE_SCOPE (0);
… …
867 915
868 SvREFCNT_dec (PL_diehook); 916 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook); 917 SvREFCNT_dec (PL_warnhook);
870 918
871 SvREFCNT_dec (coro->saved_deffh); 919 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw); 920 SvREFCNT_dec (coro_throw);
873 921
874 coro_destroy_stacks (aTHX); 922 coro_destruct_stacks (aTHX);
875} 923}
876 924
877static void 925INLINE void
878free_coro_mortal (pTHX) 926free_coro_mortal (pTHX)
879{ 927{
880 if (expect_true (coro_mortal)) 928 if (expect_true (coro_mortal))
881 { 929 {
882 SvREFCNT_dec (coro_mortal); 930 SvREFCNT_dec (coro_mortal);
… …
887static int 935static int
888runops_trace (pTHX) 936runops_trace (pTHX)
889{ 937{
890 COP *oldcop = 0; 938 COP *oldcop = 0;
891 int oldcxix = -2; 939 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx; 941 coro_cctx *cctx = coro->cctx;
894 942
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 { 944 {
897 PERL_ASYNC_CHECK (); 945 PERL_ASYNC_CHECK ();
… …
916 : cx->blk_gimme == G_SCALAR ? bot + 1 964 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot; 965 : bot;
918 966
919 av_extend (av, top - bot); 967 av_extend (av, top - bot);
920 while (bot < top) 968 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++)); 969 av_push (av, SvREFCNT_inc_NN (*bot++));
922 970
923 PL_runops = RUNOPS_DEFAULT; 971 PL_runops = RUNOPS_DEFAULT;
924 ENTER; 972 ENTER;
925 SAVETMPS; 973 SAVETMPS;
926 EXTEND (SP, 3); 974 EXTEND (SP, 3);
… …
1006 1054
1007 TAINT_NOT; 1055 TAINT_NOT;
1008 return 0; 1056 return 0;
1009} 1057}
1010 1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
1011/* inject a fake call to Coro::State::_cctx_init into the execution */ 1066/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */ 1067/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */ 1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
1014static void NOINLINE 1070static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx) 1071cctx_prepare (pTHX_ coro_cctx *cctx)
1016{ 1072{
1017 dSP; 1073 dSP;
1018 LOGOP myop; 1074 UNOP myop;
1019 1075
1020 PL_top_env = &PL_start_env; 1076 PL_top_env = &PL_start_env;
1021 1077
1022 if (cctx->flags & CC_TRACE) 1078 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace; 1079 PL_runops = runops_trace;
1024 1080
1025 Zero (&myop, 1, LOGOP); 1081 Zero (&myop, 1, UNOP);
1026 myop.op_next = PL_op; 1082 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028 1084
1029 PUSHMARK (SP); 1085 PUSHMARK (SP);
1030 EXTEND (SP, 2); 1086 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK; 1089 PUTBACK;
1034 PL_op = (OP *)&myop; 1090 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN; 1092 SPAGAIN;
1037} 1093}
1038 1094
1095/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void
1097transfer_tail (pTHX)
1098{
1099 free_coro_mortal (aTHX);
1100}
1101
1039/* 1102/*
1040 * this is a _very_ stripped down perl interpreter ;) 1103 * this is a _very_ stripped down perl interpreter ;)
1041 */ 1104 */
1042static void 1105static void
1043cctx_run (void *arg) 1106cctx_run (void *arg)
1044{ 1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
1113 {
1045 dTHX; 1114 dTHX;
1046 1115
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1116 /* normally we would need to skip the entersub here */
1048 UNLOCK; 1117 /* not doing so will re-execute it, which is exactly what we want */
1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next; 1118 /* PL_nop = PL_nop->op_next */
1052 1119
1053 /* inject a fake subroutine call to cctx_init */ 1120 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg); 1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055 1122
1123 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX);
1125
1056 /* somebody or something will hit me for both perl_run and PL_restartop */ 1126 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op; 1127 PL_restartop = PL_op;
1058 perl_run (PL_curinterp); 1128 perl_run (PL_curinterp);
1059 1129
1060 /* 1130 /*
1061 * If perl-run returns we assume exit() was being called or the coro 1131 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug) 1132 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the 1133 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main" 1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept 1135 * coroutine as Coro has no such concept
1066 */ 1136 */
1067 PL_top_env = main_top_env; 1137 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
1069} 1140}
1070 1141
1071static coro_cctx * 1142static coro_cctx *
1072cctx_new () 1143cctx_new ()
1073{ 1144{
1074 coro_cctx *cctx; 1145 coro_cctx *cctx;
1146
1147 ++cctx_count;
1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
1075 void *stack_start; 1174 void *stack_start;
1076 size_t stack_size; 1175 size_t stack_size;
1077 1176
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP 1177#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */ 1179 /* mmap supposedly does allocate-on-write for us */
1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086 1181
1087 if (cctx->sptr != (void *)-1) 1182 if (cctx->sptr != (void *)-1)
1088 { 1183 {
1089# if CORO_STACKGUARD 1184 #if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif 1186 #endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED; 1189 cctx->flags |= CC_MAPPED;
1095 } 1190 }
1096 else 1191 else
1097#endif 1192#endif
1098 { 1193 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long); 1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long); 1195 New (0, cctx->sptr, cctx_stacksize, long);
1101 1196
1102 if (!cctx->sptr) 1197 if (!cctx->sptr)
1103 { 1198 {
1104 perror ("FATAL: unable to allocate stack for coroutine"); 1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1105 _exit (EXIT_FAILURE); 1200 _exit (EXIT_FAILURE);
1106 } 1201 }
1107 1202
1108 stack_start = cctx->sptr; 1203 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize; 1204 stack_size = cctx->ssize;
1110 } 1205 }
1111 1206
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1209 #endif
1210
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114 1212
1115 return cctx; 1213 return cctx;
1116} 1214}
1117 1215
… …
1120{ 1218{
1121 if (!cctx) 1219 if (!cctx)
1122 return; 1220 return;
1123 1221
1124 --cctx_count; 1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
1125 1224
1225 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr)
1227 {
1126#if CORO_USE_VALGRIND 1228 #if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif 1230 #endif
1129 1231
1130#if HAVE_MMAP 1232#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED) 1233 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize); 1234 munmap (cctx->sptr, cctx->ssize);
1133 else 1235 else
1134#endif 1236#endif
1135 Safefree (cctx->sptr); 1237 Safefree (cctx->sptr);
1238 }
1136 1239
1137 Safefree (cctx); 1240 Safefree (cctx);
1138} 1241}
1139 1242
1140/* wether this cctx should be destructed */ 1243/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1142 1245
1143static coro_cctx * 1246static coro_cctx *
1144cctx_get (pTHX) 1247cctx_get (pTHX)
1145{ 1248{
1146 while (expect_true (cctx_first)) 1249 while (expect_true (cctx_first))
… …
1153 return cctx; 1256 return cctx;
1154 1257
1155 cctx_destroy (cctx); 1258 cctx_destroy (cctx);
1156 } 1259 }
1157 1260
1158 return cctx_new (); 1261 return cctx_new_run ();
1159} 1262}
1160 1263
1161static void 1264static void
1162cctx_put (coro_cctx *cctx) 1265cctx_put (coro_cctx *cctx)
1163{ 1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1164 /* free another cctx if overlimit */ 1269 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1270 if (expect_false (cctx_idle >= cctx_max_idle))
1166 { 1271 {
1167 coro_cctx *first = cctx_first; 1272 coro_cctx *first = cctx_first;
1168 cctx_first = first->next; 1273 cctx_first = first->next;
1169 --cctx_idle; 1274 --cctx_idle;
1170 1275
… …
1179/** coroutine switching *****************************************************/ 1284/** coroutine switching *****************************************************/
1180 1285
1181static void 1286static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next) 1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{ 1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1184 if (expect_true (prev != next)) 1291 if (expect_true (prev != next))
1185 { 1292 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1188 1295
1189 if (expect_false (next->flags & CF_RUNNING)) 1296 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1191 1298
1192 if (expect_false (next->flags & CF_DESTROYED)) 1299 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1194 1301
1195#if !PERL_VERSION_ATLEAST (5,10,0) 1302#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1198#endif 1305#endif
1199 } 1306 }
1200} 1307}
1201 1308
1202/* always use the TRANSFER macro */ 1309/* always use the TRANSFER macro */
1203static void NOINLINE 1310static void NOINLINE /* noinline so we have a fixed stackframe */
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{ 1312{
1206 dSTACKLEVEL; 1313 dSTACKLEVEL;
1207 static volatile int has_throw;
1208 1314
1209 /* sometimes transfer is only called to set idle_sp */ 1315 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next)) 1316 if (expect_false (!next))
1211 { 1317 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 } 1320 }
1215 else if (expect_true (prev != next)) 1321 else if (expect_true (prev != next))
1216 { 1322 {
1217 coro_cctx *prev__cctx; 1323 coro_cctx *prev__cctx;
1218 1324
1219 if (expect_false (prev->flags & CF_NEW)) 1325 if (expect_false (prev->flags & CF_NEW))
1220 { 1326 {
1221 /* create a new empty context */ 1327 /* create a new empty/source context */
1222 Newz (0, prev->cctx, 1, coro_cctx); 1328 prev->cctx = cctx_new_empty ();
1223 prev->flags &= ~CF_NEW; 1329 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING; 1330 prev->flags |= CF_RUNNING;
1225 } 1331 }
1226 1332
1227 prev->flags &= ~CF_RUNNING; 1333 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING; 1334 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231 1335
1232 /* first get rid of the old state */ 1336 /* first get rid of the old state */
1233 save_perl (aTHX_ prev); 1337 save_perl (aTHX_ prev);
1234 1338
1235 if (expect_false (next->flags & CF_NEW)) 1339 if (expect_false (next->flags & CF_NEW))
… …
1242 else 1346 else
1243 load_perl (aTHX_ next); 1347 load_perl (aTHX_ next);
1244 1348
1245 prev__cctx = prev->cctx; 1349 prev__cctx = prev->cctx;
1246 1350
1247 /* possibly "free" the cctx */ 1351 /* possibly untie and reuse the cctx */
1248 if (expect_true ( 1352 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL 1353 prev__cctx->idle_sp == (void *)stacklevel
1250 && !(prev__cctx->flags & CC_TRACE) 1354 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx 1355 && !force_cctx
1252 )) 1356 ))
1253 { 1357 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1256 1360
1257 prev->cctx = 0; 1361 prev->cctx = 0;
1258 1362
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1267 1371
1268 ++next->usecount; 1372 ++next->usecount;
1269 1373
1270 if (expect_true (!next->cctx)) 1374 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX); 1375 next->cctx = cctx_get (aTHX);
1272
1273 has_throw = !!next->throw;
1274 1376
1275 if (expect_false (prev__cctx != next->cctx)) 1377 if (expect_false (prev__cctx != next->cctx))
1276 { 1378 {
1277 prev__cctx->top_env = PL_top_env; 1379 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env; 1380 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 } 1382 }
1281 1383
1282 free_coro_mortal (aTHX); 1384 transfer_tail (aTHX);
1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
1296 }
1297 } 1385 }
1298} 1386}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304 1387
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307 1390
1308/** high level stuff ********************************************************/ 1391/** high level stuff ********************************************************/
… …
1310static int 1393static int
1311coro_state_destroy (pTHX_ struct coro *coro) 1394coro_state_destroy (pTHX_ struct coro *coro)
1312{ 1395{
1313 if (coro->flags & CF_DESTROYED) 1396 if (coro->flags & CF_DESTROYED)
1314 return 0; 1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1315 1401
1316 coro->flags |= CF_DESTROYED; 1402 coro->flags |= CF_DESTROYED;
1317 1403
1318 if (coro->flags & CF_READY) 1404 if (coro->flags & CF_READY)
1319 { 1405 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */ 1407 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready; 1408 --coro_nready;
1324 UNLOCK;
1325 } 1409 }
1326 else 1410 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328 1412
1329 if (coro->mainstack && coro->mainstack != main_mainstack) 1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 { 1414 {
1331 struct coro temp; 1415 struct coro temp;
1332 1416
1333 if (coro->flags & CF_RUNNING) 1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335 1418
1336 save_perl (aTHX_ &temp); 1419 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro); 1420 load_perl (aTHX_ coro);
1338 1421
1339 coro_destroy (aTHX_ coro); 1422 coro_destruct (aTHX_ coro);
1340 1423
1341 load_perl (aTHX_ &temp); 1424 load_perl (aTHX_ &temp);
1342 1425
1343 coro->slot = 0; 1426 coro->slot = 0;
1344 } 1427 }
… …
1390# define MGf_DUP 0 1473# define MGf_DUP 0
1391#endif 1474#endif
1392}; 1475};
1393 1476
1394static void 1477static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{ 1479{
1397 ta->prev = SvSTATE (prev_sv); 1480 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv); 1481 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta); 1482 TRANSFER_CHECK (*ta);
1400} 1483}
1401 1484
1402static void 1485static void
1403api_transfer (SV *prev_sv, SV *next_sv) 1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1404{ 1487{
1405 dTHX;
1406 struct transfer_args ta; 1488 struct coro_transfer_args ta;
1407 1489
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1); 1491 TRANSFER (ta, 1);
1410} 1492}
1411 1493
1412/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
1413 1495
1414static void 1496INLINE void
1415coro_enq (pTHX_ SV *coro_sv) 1497coro_enq (pTHX_ struct coro *coro)
1416{ 1498{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1418} 1500}
1419 1501
1420static SV * 1502INLINE SV *
1421coro_deq (pTHX) 1503coro_deq (pTHX)
1422{ 1504{
1423 int prio; 1505 int prio;
1424 1506
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1428 1510
1429 return 0; 1511 return 0;
1430} 1512}
1431 1513
1432static int 1514static int
1433api_ready (SV *coro_sv) 1515api_ready (pTHX_ SV *coro_sv)
1434{ 1516{
1435 dTHX;
1436 struct coro *coro; 1517 struct coro *coro;
1437 SV *sv_hook; 1518 SV *sv_hook;
1438 void (*xs_hook)(void); 1519 void (*xs_hook)(void);
1439 1520
1440 if (SvROK (coro_sv)) 1521 if (SvROK (coro_sv))
… …
1445 if (coro->flags & CF_READY) 1526 if (coro->flags & CF_READY)
1446 return 0; 1527 return 0;
1447 1528
1448 coro->flags |= CF_READY; 1529 coro->flags |= CF_READY;
1449 1530
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook; 1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454 1533
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1534 coro_enq (aTHX_ coro);
1456 ++coro_nready; 1535 ++coro_nready;
1457 1536
1458 UNLOCK;
1459
1460 if (sv_hook) 1537 if (sv_hook)
1461 { 1538 {
1462 dSP; 1539 dSP;
1463 1540
1464 ENTER; 1541 ENTER;
… …
1478 1555
1479 return 1; 1556 return 1;
1480} 1557}
1481 1558
1482static int 1559static int
1483api_is_ready (SV *coro_sv) 1560api_is_ready (pTHX_ SV *coro_sv)
1484{ 1561{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487} 1563}
1488 1564
1489static void 1565INLINE void
1490prepare_schedule (pTHX_ struct transfer_args *ta) 1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1491{ 1567{
1492 SV *prev_sv, *next_sv; 1568 SV *prev_sv, *next_sv;
1493 1569
1494 for (;;) 1570 for (;;)
1495 { 1571 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX); 1572 next_sv = coro_deq (aTHX);
1498 1573
1499 /* nothing to schedule: call the idle handler */ 1574 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv)) 1575 if (expect_false (!next_sv))
1501 { 1576 {
1502 dSP; 1577 dSP;
1503 UNLOCK;
1504 1578
1505 ENTER; 1579 ENTER;
1506 SAVETMPS; 1580 SAVETMPS;
1507 1581
1508 PUSHMARK (SP); 1582 PUSHMARK (SP);
… …
1513 FREETMPS; 1587 FREETMPS;
1514 LEAVE; 1588 LEAVE;
1515 continue; 1589 continue;
1516 } 1590 }
1517 1591
1518 ta->next = SvSTATE (next_sv); 1592 ta->next = SvSTATE_hv (next_sv);
1519 1593
1520 /* cannot transfer to destroyed coros, skip and look for next */ 1594 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED)) 1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 { 1596 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv); 1597 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */ 1598 /* coro_nready has already been taken care of by destroy */
1526 continue; 1599 continue;
1527 } 1600 }
1528 1601
1529 --coro_nready; 1602 --coro_nready;
1530 UNLOCK;
1531 break; 1603 break;
1532 } 1604 }
1533 1605
1534 /* free this only after the transfer */ 1606 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current); 1607 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv); 1608 ta->prev = SvSTATE_hv (prev_sv);
1537 TRANSFER_CHECK (*ta); 1609 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY); 1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1539 ta->next->flags &= ~CF_READY; 1611 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv); 1612 SvRV_set (coro_current, next_sv);
1541 1613
1542 LOCK;
1543 free_coro_mortal (aTHX); 1614 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv; 1615 coro_mortal = prev_sv;
1545 UNLOCK;
1546} 1616}
1547 1617
1548static void 1618INLINE void
1549prepare_cede (pTHX_ struct transfer_args *ta) 1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1550{ 1620{
1551 api_ready (coro_current); 1621 api_ready (aTHX_ coro_current);
1552 prepare_schedule (aTHX_ ta); 1622 prepare_schedule (aTHX_ ta);
1553} 1623}
1554 1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
1634 }
1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1555static int 1648static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta) 1649api_cede (pTHX)
1557{ 1650{
1558 if (coro_nready) 1651 struct coro_transfer_args ta;
1559 { 1652
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta); 1653 prepare_cede (aTHX_ &ta);
1562 api_ready (prev); 1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
1563 return 1; 1658 return 1;
1564 } 1659 }
1565 else 1660 else
1566 return 0; 1661 return 0;
1567} 1662}
1568 1663
1569static void
1570api_schedule (void)
1571{
1572 dTHX;
1573 struct transfer_args ta;
1574
1575 prepare_schedule (aTHX_ &ta);
1576 TRANSFER (ta, 1);
1577}
1578
1579static int 1664static int
1580api_cede (void) 1665api_cede_notself (pTHX)
1581{ 1666{
1582 dTHX; 1667 if (coro_nready)
1668 {
1583 struct transfer_args ta; 1669 struct coro_transfer_args ta;
1584 1670
1585 prepare_cede (aTHX_ &ta); 1671 prepare_cede_notself (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1); 1672 TRANSFER (ta, 1);
1590 return 1; 1673 return 1;
1591 } 1674 }
1592 else 1675 else
1593 return 0; 1676 return 0;
1594} 1677}
1595 1678
1596static int 1679static void
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags) 1680api_trace (pTHX_ SV *coro_sv, int flags)
1613{ 1681{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv); 1682 struct coro *coro = SvSTATE (coro_sv);
1616 1683
1617 if (flags & CC_TRACE) 1684 if (flags & CC_TRACE)
1618 { 1685 {
1619 if (!coro->cctx) 1686 if (!coro->cctx)
1620 coro->cctx = cctx_new (); 1687 coro->cctx = cctx_new_run ();
1621 else if (!(coro->cctx->flags & CC_TRACE)) 1688 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack"); 1689 croak ("cannot enable tracing on coroutine with custom stack,");
1623 1690
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 } 1692 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 { 1694 {
… …
1632 else 1699 else
1633 coro->slot->runops = RUNOPS_DEFAULT; 1700 coro->slot->runops = RUNOPS_DEFAULT;
1634 } 1701 }
1635} 1702}
1636 1703
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/ 1704/*****************************************************************************/
1654/* PerlIO::cede */ 1705/* PerlIO::cede */
1655 1706
1656typedef struct 1707typedef struct
1657{ 1708{
… …
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime (); 1736 double now = nvtime ();
1686 1737
1687 if (now >= self->next) 1738 if (now >= self->next)
1688 { 1739 {
1689 api_cede (); 1740 api_cede (aTHX);
1690 self->next = now + self->every; 1741 self->next = now + self->every;
1691 } 1742 }
1692 1743
1693 return PerlIOBuf_flush (f); 1744 return PerlIOBuf_flush (aTHX_ f);
1694} 1745}
1695 1746
1696static PerlIO_funcs PerlIO_cede = 1747static PerlIO_funcs PerlIO_cede =
1697{ 1748{
1698 sizeof(PerlIO_funcs), 1749 sizeof(PerlIO_funcs),
… …
1723 PerlIOBuf_get_ptr, 1774 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt, 1775 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt, 1776 PerlIOBuf_set_ptrcnt,
1726}; 1777};
1727 1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
1796 PUSHMARK (SP);
1797
1798 EXTEND (SP, slf_argc + 1);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
1937 {
1938 if (sp == bot)
1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
1942 }
1943
1944 PUTBACK;
1945 }
1946
1947 /* exception handling */
1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (PL_op->op_flags & OPf_STACKED)
1988 {
1989 if (items > slf_arga)
1990 {
1991 slf_arga = items;
1992 free (slf_argv);
1993 slf_argv = malloc (slf_arga * sizeof (SV *));
1994 }
1995
1996 slf_argc = items;
1997
1998 for (i = 0; i < items; ++i)
1999 slf_argv [i] = SvREFCNT_inc (arg [i]);
2000 }
2001 else
2002 slf_argc = 0;
2003
2004 PL_op->op_ppaddr = pp_slf;
2005 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2006
2007 PL_op = (OP *)&slf_restore;
2008}
2009
2010/*****************************************************************************/
2011
2012static void
2013coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2014{
2015 SV *count_sv = AvARRAY (av)[0];
2016 IV count = SvIVX (count_sv);
2017
2018 count += adjust;
2019 SvIVX (count_sv) = count;
2020
2021 /* now wake up as many waiters as are expected to lock */
2022 while (count > 0 && AvFILLp (av) > 0)
2023 {
2024 SV *cb;
2025
2026 /* swap first two elements so we can shift a waiter */
2027 AvARRAY (av)[0] = AvARRAY (av)[1];
2028 AvARRAY (av)[1] = count_sv;
2029 cb = av_shift (av);
2030
2031 if (SvOBJECT (cb))
2032 api_ready (aTHX_ cb);
2033 else
2034 croak ("callbacks not yet supported");
2035
2036 SvREFCNT_dec (cb);
2037
2038 --count;
2039 }
2040}
2041
2042static void
2043coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2044{
2045 /* call $sem->adjust (0) to possibly wake up some other waiters */
2046 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2047}
2048
2049static int
2050slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2051{
2052 AV *av = (AV *)frame->data;
2053 SV *count_sv = AvARRAY (av)[0];
2054
2055 if (SvIVX (count_sv) > 0)
2056 {
2057 SvSTATE_current->on_destroy = 0;
2058 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2059 return 0;
2060 }
2061 else
2062 {
2063 int i;
2064 /* if we were woken up but can't down, we look through the whole */
2065 /* waiters list and only add us if we aren't in there already */
2066 /* this avoids some degenerate memory usage cases */
2067
2068 for (i = 1; i <= AvFILLp (av); ++i)
2069 if (AvARRAY (av)[i] == SvRV (coro_current))
2070 return 1;
2071
2072 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2073 return 1;
2074 }
2075}
2076
2077static void
2078slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 AV *av = (AV *)SvRV (arg [0]);
2081
2082 if (SvIVX (AvARRAY (av)[0]) > 0)
2083 {
2084 frame->data = (void *)av;
2085 frame->prepare = prepare_nop;
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088 else
2089 {
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091
2092 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2093 frame->prepare = prepare_schedule;
2094
2095 /* to avoid race conditions when a woken-up coro gets terminated */
2096 /* we arrange for a temporary on_destroy that calls adjust (0) */
2097 assert (!SvSTATE_current->on_destroy);//D
2098 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2099 }
2100
2101 frame->check = slf_check_semaphore_down;
2102
2103}
2104
2105/*****************************************************************************/
2106
2107#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2108
2109/* create a closure from XS, returns a code reference */
2110/* the arg can be accessed via GENSUB_ARG from the callback */
2111/* the callback must use dXSARGS/XSRETURN */
2112static SV *
2113gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2114{
2115 CV *cv = (CV *)NEWSV (0, 0);
2116
2117 sv_upgrade ((SV *)cv, SVt_PVCV);
2118
2119 CvANON_on (cv);
2120 CvISXSUB_on (cv);
2121 CvXSUB (cv) = xsub;
2122 GENSUB_ARG = arg;
2123
2124 return newRV_noinc ((SV *)cv);
2125}
2126
2127/*****************************************************************************/
1728 2128
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2129MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730 2130
1731PROTOTYPES: DISABLE 2131PROTOTYPES: DISABLE
1732 2132
1733BOOT: 2133BOOT:
1734{ 2134{
1735#ifdef USE_ITHREADS 2135#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex); 2136# if CORO_PTHREAD
2137 coro_thx = PERL_GET_CONTEXT;
2138# endif
1737#endif 2139#endif
1738 BOOT_PAGESIZE; 2140 BOOT_PAGESIZE;
1739 2141
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2142 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2143 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1759 main_top_env = PL_top_env; 2161 main_top_env = PL_top_env;
1760 2162
1761 while (main_top_env->je_prev) 2163 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev; 2164 main_top_env = main_top_env->je_prev;
1763 2165
2166 {
2167 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2168
2169 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2170 hv_store_ent (PL_custom_op_names, slf,
2171 newSVpv ("coro_slf", 0), 0);
2172
2173 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2174 hv_store_ent (PL_custom_op_descs, slf,
2175 newSVpv ("coro schedule like function", 0), 0);
2176 }
2177
1764 coroapi.ver = CORO_API_VERSION; 2178 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION; 2179 coroapi.rev = CORO_API_REVISION;
2180
1766 coroapi.transfer = api_transfer; 2181 coroapi.transfer = api_transfer;
2182
2183 coroapi.sv_state = SvSTATE_;
2184 coroapi.execute_slf = api_execute_slf;
2185 coroapi.prepare_nop = prepare_nop;
2186 coroapi.prepare_schedule = prepare_schedule;
2187 coroapi.prepare_cede = prepare_cede;
2188 coroapi.prepare_cede_notself = prepare_cede_notself;
1767 2189
1768 { 2190 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2191 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770 2192
1771 if (!svp) croak ("Time::HiRes is required"); 2193 if (!svp) croak ("Time::HiRes is required");
… …
1804 av_push (coro->args, newSVsv (ST (i))); 2226 av_push (coro->args, newSVsv (ST (i)));
1805} 2227}
1806 OUTPUT: 2228 OUTPUT:
1807 RETVAL 2229 RETVAL
1808 2230
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1812void 2231void
1813_set_stacklevel (...) 2232_set_stacklevel (...)
1814 ALIAS: 2233 CODE:
1815 Coro::State::transfer = 1 2234 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
1816 Coro::schedule = 2
1817 Coro::cede = 3
1818 Coro::cede_notself = 4
1819 CODE:
1820{
1821 struct transfer_args ta;
1822 2235
1823 PUTBACK; 2236void
1824 switch (ix) 2237transfer (...)
1825 { 2238 PROTOTYPE: $$
1826 case 0: 2239 CODE:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2240 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1828 ta.next = 0;
1829 break;
1830
1831 case 1:
1832 if (items != 2)
1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1834
1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1836 break;
1837
1838 case 2:
1839 prepare_schedule (aTHX_ &ta);
1840 break;
1841
1842 case 3:
1843 prepare_cede (aTHX_ &ta);
1844 break;
1845
1846 case 4:
1847 if (!prepare_cede_notself (aTHX_ &ta))
1848 XSRETURN_EMPTY;
1849
1850 break;
1851 }
1852 SPAGAIN;
1853
1854 BARRIER;
1855 PUTBACK;
1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1859}
1860 2241
1861bool 2242bool
1862_destroy (SV *coro_sv) 2243_destroy (SV *coro_sv)
1863 CODE: 2244 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2245 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1871 CODE: 2252 CODE:
1872 _exit (code); 2253 _exit (code);
1873 2254
1874int 2255int
1875cctx_stacksize (int new_stacksize = 0) 2256cctx_stacksize (int new_stacksize = 0)
2257 PROTOTYPE: ;$
1876 CODE: 2258 CODE:
1877 RETVAL = coro_stacksize; 2259 RETVAL = cctx_stacksize;
1878 if (new_stacksize) 2260 if (new_stacksize)
2261 {
1879 coro_stacksize = new_stacksize; 2262 cctx_stacksize = new_stacksize;
2263 ++cctx_gen;
2264 }
1880 OUTPUT: 2265 OUTPUT:
1881 RETVAL 2266 RETVAL
1882 2267
1883int 2268int
2269cctx_max_idle (int max_idle = 0)
2270 PROTOTYPE: ;$
2271 CODE:
2272 RETVAL = cctx_max_idle;
2273 if (max_idle > 1)
2274 cctx_max_idle = max_idle;
2275 OUTPUT:
2276 RETVAL
2277
2278int
1884cctx_count () 2279cctx_count ()
2280 PROTOTYPE:
1885 CODE: 2281 CODE:
1886 RETVAL = cctx_count; 2282 RETVAL = cctx_count;
1887 OUTPUT: 2283 OUTPUT:
1888 RETVAL 2284 RETVAL
1889 2285
1890int 2286int
1891cctx_idle () 2287cctx_idle ()
2288 PROTOTYPE:
1892 CODE: 2289 CODE:
1893 RETVAL = cctx_idle; 2290 RETVAL = cctx_idle;
1894 OUTPUT: 2291 OUTPUT:
1895 RETVAL 2292 RETVAL
1896 2293
1897void 2294void
1898list () 2295list ()
2296 PROTOTYPE:
1899 PPCODE: 2297 PPCODE:
1900{ 2298{
1901 struct coro *coro; 2299 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next) 2300 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv) 2301 if (coro->hv)
… …
1962 RETVAL = boolSV (coro->flags & ix); 2360 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT: 2361 OUTPUT:
1964 RETVAL 2362 RETVAL
1965 2363
1966void 2364void
2365throw (Coro::State self, SV *throw = &PL_sv_undef)
2366 PROTOTYPE: $;$
2367 CODE:
2368{
2369 struct coro *current = SvSTATE_current;
2370 SV **throwp = self == current ? &coro_throw : &self->throw;
2371 SvREFCNT_dec (*throwp);
2372 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2373}
2374
2375void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2376api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2377 PROTOTYPE: $;$
2378 C_ARGS: aTHX_ coro, flags
1968 2379
1969SV * 2380SV *
1970has_cctx (Coro::State coro) 2381has_cctx (Coro::State coro)
1971 PROTOTYPE: $ 2382 PROTOTYPE: $
1972 CODE: 2383 CODE:
… …
1980 CODE: 2391 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2392 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT: 2393 OUTPUT:
1983 RETVAL 2394 RETVAL
1984 2395
1985IV 2396UV
1986rss (Coro::State coro) 2397rss (Coro::State coro)
1987 PROTOTYPE: $ 2398 PROTOTYPE: $
1988 ALIAS: 2399 ALIAS:
1989 usecount = 1 2400 usecount = 1
1990 CODE: 2401 CODE:
… …
1996 OUTPUT: 2407 OUTPUT:
1997 RETVAL 2408 RETVAL
1998 2409
1999void 2410void
2000force_cctx () 2411force_cctx ()
2412 PROTOTYPE:
2001 CODE: 2413 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0; 2414 SvSTATE_current->cctx->idle_sp = 0;
2004
2005void
2006throw (Coro::State self, SV *throw = &PL_sv_undef)
2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2011 2415
2012void 2416void
2013swap_defsv (Coro::State self) 2417swap_defsv (Coro::State self)
2014 PROTOTYPE: $ 2418 PROTOTYPE: $
2015 ALIAS: 2419 ALIAS:
2016 swap_defav = 1 2420 swap_defav = 1
2017 CODE: 2421 CODE:
2018 if (!self->slot) 2422 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state"); 2423 croak ("cannot swap state with coroutine that has no saved state,");
2020 else 2424 else
2021 { 2425 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2426 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2427 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024 2428
… …
2049 2453
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2454 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV (); 2455 coro_ready[i] = newAV ();
2052 2456
2053 { 2457 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE); 2458 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056 2459
2057 coroapi.schedule = api_schedule; 2460 coroapi.schedule = api_schedule;
2058 coroapi.cede = api_cede; 2461 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself; 2462 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready; 2463 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready; 2464 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready; 2465 coroapi.nready = coro_nready;
2063 coroapi.current = coro_current; 2466 coroapi.current = coro_current;
2064 2467
2065 GCoroAPI = &coroapi; 2468 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi); 2469 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv); 2470 SvREADONLY_on (sv);
2068 } 2471 }
2069} 2472}
2473
2474void
2475schedule (...)
2476 CODE:
2477 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2478
2479void
2480cede (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede);
2483
2484void
2485cede_notself (...)
2486 CODE:
2487 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2070 2488
2071void 2489void
2072_set_current (SV *current) 2490_set_current (SV *current)
2073 PROTOTYPE: $ 2491 PROTOTYPE: $
2074 CODE: 2492 CODE:
2075 SvREFCNT_dec (SvRV (coro_current)); 2493 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2494 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2077 2495
2078void 2496void
2079_set_readyhook (SV *hook) 2497_set_readyhook (SV *hook)
2080 PROTOTYPE: $ 2498 PROTOTYPE: $
2081 CODE: 2499 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook); 2500 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2501 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086 2502
2087int 2503int
2088prio (Coro::State coro, int newprio = 0) 2504prio (Coro::State coro, int newprio = 0)
2505 PROTOTYPE: $;$
2089 ALIAS: 2506 ALIAS:
2090 nice = 1 2507 nice = 1
2091 CODE: 2508 CODE:
2092{ 2509{
2093 RETVAL = coro->prio; 2510 RETVAL = coro->prio;
… …
2108 2525
2109SV * 2526SV *
2110ready (SV *self) 2527ready (SV *self)
2111 PROTOTYPE: $ 2528 PROTOTYPE: $
2112 CODE: 2529 CODE:
2113 RETVAL = boolSV (api_ready (self)); 2530 RETVAL = boolSV (api_ready (aTHX_ self));
2114 OUTPUT: 2531 OUTPUT:
2115 RETVAL 2532 RETVAL
2116 2533
2117int 2534int
2118nready (...) 2535nready (...)
… …
2125# for async_pool speedup 2542# for async_pool speedup
2126void 2543void
2127_pool_1 (SV *cb) 2544_pool_1 (SV *cb)
2128 CODE: 2545 CODE:
2129{ 2546{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current); 2547 HV *hv = (HV *)SvRV (coro_current);
2548 struct coro *coro = SvSTATE_hv ((SV *)hv);
2132 AV *defav = GvAV (PL_defgv); 2549 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2550 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av; 2551 AV *invoke_av;
2135 int i, len; 2552 int i, len;
2136 2553
… …
2141 SvREFCNT_dec (old); 2558 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n"); 2559 croak ("\3async_pool terminate\2\n");
2143 } 2560 }
2144 2561
2145 SvREFCNT_dec (coro->saved_deffh); 2562 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2563 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2147 2564
2148 hv_store (hv, "desc", sizeof ("desc") - 1, 2565 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2566 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150 2567
2151 invoke_av = (AV *)SvRV (invoke); 2568 invoke_av = (AV *)SvRV (invoke);
… …
2155 2572
2156 if (len > 0) 2573 if (len > 0)
2157 { 2574 {
2158 av_fill (defav, len - 1); 2575 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i) 2576 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2577 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2161 } 2578 }
2162
2163 SvREFCNT_dec (invoke);
2164} 2579}
2165 2580
2166void 2581void
2167_pool_2 (SV *cb) 2582_pool_2 (SV *cb)
2168 CODE: 2583 CODE:
2169{ 2584{
2170 struct coro *coro = SvSTATE (coro_current); 2585 HV *hv = (HV *)SvRV (coro_current);
2586 struct coro *coro = SvSTATE_hv ((SV *)hv);
2171 2587
2172 sv_setsv (cb, &PL_sv_undef); 2588 sv_setsv (cb, &PL_sv_undef);
2173 2589
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2590 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0; 2591 coro->saved_deffh = 0;
2176 2592
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2593 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2594 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 { 2595 {
2180 SV *old = PL_diehook; 2596 SV *old = PL_diehook;
2181 PL_diehook = 0; 2597 PL_diehook = 0;
2182 SvREFCNT_dec (old); 2598 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n"); 2599 croak ("\3async_pool terminate\2\n");
2184 } 2600 }
2185 2601
2186 av_clear (GvAV (PL_defgv)); 2602 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2603 hv_store (hv, "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2604 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189 2605
2190 coro->prio = 0; 2606 coro->prio = 0;
2191 2607
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2608 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0); 2609 api_trace (aTHX_ coro_current, 0);
2194 2610
2195 av_push (av_async_pool, newSVsv (coro_current)); 2611 av_push (av_async_pool, newSVsv (coro_current));
2196} 2612}
2197 2613
2198#if 0 2614
2615MODULE = Coro::State PACKAGE = Coro::AIO
2199 2616
2200void 2617void
2201_generator_call (...) 2618_get_state (SV *self)
2202 PROTOTYPE: @ 2619 PROTOTYPE: $
2203 PPCODE: 2620 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
2211 CODE:
2212{ 2621{
2213 struct coro *coro; 2622 AV *defav = GvAV (PL_defgv);
2214 MAGIC *mg; 2623 AV *av = newAV ();
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i; 2624 int i;
2218
2219 CvGV (ncv) = CvGV (cv);
2220 CvFILE (ncv) = CvFILE (cv);
2221
2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT:
2242 RETVAL
2243
2244#endif
2245
2246
2247MODULE = Coro::State PACKAGE = Coro::AIO
2248
2249SV *
2250_get_state ()
2251 CODE:
2252{
2253 struct io_state *data;
2254
2255 RETVAL = newSV (sizeof (struct io_state)); 2625 SV *data_sv = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL); 2626 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2257 SvCUR_set (RETVAL, sizeof (struct io_state)); 2627 SvCUR_set (data_sv, sizeof (struct io_state));
2258 SvPOK_only (RETVAL); 2628 SvPOK_only (data_sv);
2259 2629
2260 data->errorno = errno; 2630 data->errorno = errno;
2261 data->laststype = PL_laststype; 2631 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval; 2632 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache; 2633 data->statcache = PL_statcache;
2634
2635 av_extend (av, AvFILLp (defav) + 1 + 1);
2636
2637 for (i = 0; i <= AvFILLp (defav); ++i)
2638 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2639
2640 av_push (av, data_sv);
2641
2642 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2643
2644 api_ready (aTHX_ self);
2264} 2645}
2265 OUTPUT:
2266 RETVAL
2267 2646
2268void 2647void
2269_set_state (char *data_) 2648_set_state (SV *state)
2270 PROTOTYPE: $ 2649 PROTOTYPE: $
2271 CODE: 2650 PPCODE:
2272{ 2651{
2273 struct io_state *data = (void *)data_; 2652 AV *av = (AV *)SvRV (state);
2653 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2654 int i;
2274 2655
2275 errno = data->errorno; 2656 errno = data->errorno;
2276 PL_laststype = data->laststype; 2657 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval; 2658 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache; 2659 PL_statcache = data->statcache;
2660
2661 EXTEND (SP, AvFILLp (av));
2662 for (i = 0; i < AvFILLp (av); ++i)
2663 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2279} 2664}
2280 2665
2281 2666
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent 2667MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283 2668
2284BOOT: 2669BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2670 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286 2671
2287SV * 2672void
2288_schedule (...) 2673_schedule (...)
2289 PROTOTYPE: @
2290 CODE: 2674 CODE:
2291{ 2675{
2292 static int incede; 2676 static int incede;
2293 2677
2294 api_cede_notself (); 2678 api_cede_notself (aTHX);
2295 2679
2296 ++incede; 2680 ++incede;
2297 while (coro_nready >= incede && api_cede ()) 2681 while (coro_nready >= incede && api_cede (aTHX))
2298 ; 2682 ;
2299 2683
2300 sv_setsv (sv_activity, &PL_sv_undef); 2684 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede) 2685 if (coro_nready >= incede)
2302 { 2686 {
… …
2312 2696
2313MODULE = Coro::State PACKAGE = PerlIO::cede 2697MODULE = Coro::State PACKAGE = PerlIO::cede
2314 2698
2315BOOT: 2699BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2700 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2701
2702MODULE = Coro::State PACKAGE = Coro::Semaphore
2703
2704SV *
2705new (SV *klass, SV *count_ = 0)
2706 CODE:
2707{
2708 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2711 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2712}
2713 OUTPUT:
2714 RETVAL
2715
2716SV *
2717count (SV *self)
2718 CODE:
2719 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2720 OUTPUT:
2721 RETVAL
2722
2723void
2724up (SV *self, int adjust = 1)
2725 ALIAS:
2726 adjust = 1
2727 CODE:
2728 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2729
2730void
2731down (SV *self)
2732 CODE:
2733 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

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