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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 1.282 by root, Sun Nov 16 10:33:08 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 */
171static volatile struct coro *transfer_next;
167 172
168static GV *irsgv; /* $/ */ 173static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */ 174static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook; 175static SV *rv_diehook;
171static SV *rv_warnhook; 176static SV *rv_warnhook;
… …
190 CC_TRACE_LINE = 0x10, /* trace each statement */ 195 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192}; 197};
193 198
194/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx { 200typedef struct coro_cctx
201{
196 struct coro_cctx *next; 202 struct coro_cctx *next;
197 203
198 /* the stack */ 204 /* the stack */
199 void *sptr; 205 void *sptr;
200 size_t ssize; 206 size_t ssize;
… …
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 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 */ 210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env; 211 JMPENV *top_env;
206 coro_context cctx; 212 coro_context cctx;
207 213
214 U32 gen;
208#if CORO_USE_VALGRIND 215#if CORO_USE_VALGRIND
209 int valgrind_id; 216 int valgrind_id;
210#endif 217#endif
211 unsigned char flags; 218 unsigned char flags;
212} coro_cctx; 219} coro_cctx;
… …
217 CF_NEW = 0x0004, /* has never been switched to */ 224 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219}; 226};
220 227
221/* the structure where most of the perl state is stored, overlaid on the cxstack */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct { 229typedef struct
230{
223 SV *defsv; 231 SV *defsv;
224 AV *defav; 232 AV *defav;
225 SV *errsv; 233 SV *errsv;
226 SV *irsgv; 234 SV *irsgv;
227#define VAR(name,type) type name; 235#define VAR(name,type) type name;
… …
231 239
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233 241
234/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
235struct coro { 243struct coro {
236 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
237 coro_cctx *cctx; 245 coro_cctx *cctx;
238 246
239 /* process data */ 247 /* process data */
248 struct CoroSLF slf_frame; /* saved slf frame */
240 AV *mainstack; 249 AV *mainstack;
241 perl_slots *slot; /* basically the saved sp */ 250 perl_slots *slot; /* basically the saved sp */
242 251
243 AV *args; /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */ 253 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */ 254 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */ 255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
247 257
248 /* statistics */ 258 /* statistics */
249 int usecount; /* number of transfers to this coro */ 259 int usecount; /* number of transfers to this coro */
250 260
251 /* coro process data */ 261 /* coro process data */
… …
259 struct coro *next, *prev; 269 struct coro *next, *prev;
260}; 270};
261 271
262typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
263typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275static struct CoroSLF slf_frame; /* the current slf frame */
264 276
265/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
266 278
267#define PRIO_MAX 3 279#define PRIO_MAX 3
268#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
272#define PRIO_MIN -4 284#define PRIO_MIN -4
273 285
274/* for Coro.pm */ 286/* for Coro.pm */
275static SV *coro_current; 287static SV *coro_current;
276static SV *coro_readyhook; 288static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
278static int coro_nready;
279static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
280 292
281/** lowlevel stuff **********************************************************/ 293/** lowlevel stuff **********************************************************/
282 294
283static SV * 295static SV *
284coro_get_sv (pTHX_ const char *name, int create) 296coro_get_sv (pTHX_ const char *name, int create)
… …
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif 337#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist); 339 --AvFILLp (padlist);
328 340
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
330 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
331 343
332 return newpadlist; 344 return newpadlist;
333} 345}
334 346
… …
377static MGVTBL coro_cv_vtbl = { 389static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0, 390 0, 0, 0, 0,
379 coro_cv_free 391 coro_cv_free
380}; 392};
381 393
382#define CORO_MAGIC(sv,type) \ 394#define CORO_MAGIC(sv, type) \
383 SvMAGIC (sv) \ 395 expect_true (SvMAGIC (sv)) \
384 ? SvMAGIC (sv)->mg_type == type \ 396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
385 ? SvMAGIC (sv) \ 397 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \ 398 : mg_find (sv, type) \
387 : 0 399 : 0
388 400
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 401#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) 402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391 403
392static struct coro * 404INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro) 405SvSTATE_ (pTHX_ SV *coro)
394{ 406{
395 HV *stash; 407 HV *stash;
396 MAGIC *mg; 408 MAGIC *mg;
397 409
… …
412 mg = CORO_MAGIC_state (coro); 424 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr; 425 return (struct coro *)mg->mg_ptr;
414} 426}
415 427
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
417 442
418/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
419static void 444static void
420get_padlist (pTHX_ CV *cv) 445get_padlist (pTHX_ CV *cv)
421{ 446{
… …
488 CvPADLIST (cv) = (AV *)POPs; 513 CvPADLIST (cv) = (AV *)POPs;
489 } 514 }
490 515
491 PUTBACK; 516 PUTBACK;
492 } 517 }
518
519 slf_frame = c->slf_frame;
493} 520}
494 521
495static void 522static void
496save_perl (pTHX_ Coro__State c) 523save_perl (pTHX_ Coro__State c)
497{ 524{
525 c->slf_frame = slf_frame;
526
498 { 527 {
499 dSP; 528 dSP;
500 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
501 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
502 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
569 #undef VAR 598 #undef VAR
570 } 599 }
571} 600}
572 601
573/* 602/*
574 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
575 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
578 */ 607 */
579#if CORO_PREFER_PERL_FUNCTIONS 608#if CORO_PREFER_PERL_FUNCTIONS
… …
622 651
623/* 652/*
624 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
625 */ 654 */
626static void 655static void
627coro_destroy_stacks (pTHX) 656coro_destruct_stacks (pTHX)
628{ 657{
629 while (PL_curstackinfo->si_next) 658 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
631 660
632 while (PL_curstackinfo) 661 while (PL_curstackinfo)
… …
781 810
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783} 812}
784 813
785static void 814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
786coro_setup (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
787{ 829{
788 /* 830 /*
789 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
790 */ 832 */
… …
810 GvSV (PL_defgv) = newSV (0); 852 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0; 853 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0); 854 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv)); 856 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
816 858
817 { 859 {
818 dSP; 860 dSP;
819 LOGOP myop; 861 UNOP myop;
820 862
821 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
822 myop.op_next = Nullop; 864 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
824 866
825 PUSHMARK (SP); 867 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN; 872 SPAGAIN;
831 } 873 }
832 874
833 /* this newly created coroutine might be run on an existing cctx which most 875 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub. 876 * 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 */ 877 */
838 ENTER; 878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
839} 880}
840 881
841static void 882static void
842coro_destroy (pTHX_ struct coro *coro) 883coro_destruct (pTHX_ struct coro *coro)
843{ 884{
844 if (!IN_DESTRUCT) 885 if (!IN_DESTRUCT)
845 { 886 {
846 /* restore all saved variables and stuff */ 887 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0); 888 LEAVE_SCOPE (0);
… …
869 SvREFCNT_dec (PL_warnhook); 910 SvREFCNT_dec (PL_warnhook);
870 911
871 SvREFCNT_dec (coro->saved_deffh); 912 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw); 913 SvREFCNT_dec (coro->throw);
873 914
874 coro_destroy_stacks (aTHX); 915 coro_destruct_stacks (aTHX);
875} 916}
876 917
877static void 918INLINE void
878free_coro_mortal (pTHX) 919free_coro_mortal (pTHX)
879{ 920{
880 if (expect_true (coro_mortal)) 921 if (expect_true (coro_mortal))
881 { 922 {
882 SvREFCNT_dec (coro_mortal); 923 SvREFCNT_dec (coro_mortal);
… …
887static int 928static int
888runops_trace (pTHX) 929runops_trace (pTHX)
889{ 930{
890 COP *oldcop = 0; 931 COP *oldcop = 0;
891 int oldcxix = -2; 932 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx; 934 coro_cctx *cctx = coro->cctx;
894 935
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 { 937 {
897 PERL_ASYNC_CHECK (); 938 PERL_ASYNC_CHECK ();
… …
916 : cx->blk_gimme == G_SCALAR ? bot + 1 957 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot; 958 : bot;
918 959
919 av_extend (av, top - bot); 960 av_extend (av, top - bot);
920 while (bot < top) 961 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++)); 962 av_push (av, SvREFCNT_inc_NN (*bot++));
922 963
923 PL_runops = RUNOPS_DEFAULT; 964 PL_runops = RUNOPS_DEFAULT;
924 ENTER; 965 ENTER;
925 SAVETMPS; 966 SAVETMPS;
926 EXTEND (SP, 3); 967 EXTEND (SP, 3);
… …
1006 1047
1007 TAINT_NOT; 1048 TAINT_NOT;
1008 return 0; 1049 return 0;
1009} 1050}
1010 1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1011/* inject a fake call to Coro::State::_cctx_init into the execution */ 1059/* 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 */ 1060/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */ 1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1014static void NOINLINE 1063static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx) 1064cctx_prepare (pTHX_ coro_cctx *cctx)
1016{ 1065{
1017 dSP; 1066 dSP;
1018 LOGOP myop; 1067 UNOP myop;
1019 1068
1020 PL_top_env = &PL_start_env; 1069 PL_top_env = &PL_start_env;
1021 1070
1022 if (cctx->flags & CC_TRACE) 1071 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace; 1072 PL_runops = runops_trace;
1024 1073
1025 Zero (&myop, 1, LOGOP); 1074 Zero (&myop, 1, UNOP);
1026 myop.op_next = PL_op; 1075 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028 1077
1029 PUSHMARK (SP); 1078 PUSHMARK (SP);
1030 EXTEND (SP, 2); 1079 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK; 1082 PUTBACK;
1034 PL_op = (OP *)&myop; 1083 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN; 1085 SPAGAIN;
1037} 1086}
1038 1087
1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
1099 {
1100 SV *exception = sv_2mortal (next->throw);
1101
1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
1106}
1107
1039/* 1108/*
1040 * this is a _very_ stripped down perl interpreter ;) 1109 * this is a _very_ stripped down perl interpreter ;)
1041 */ 1110 */
1042static void 1111static void
1043cctx_run (void *arg) 1112cctx_run (void *arg)
1044{ 1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
1045 dTHX; 1120 dTHX;
1046 1121
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1122 /* normally we would need to skip the entersub here */
1048 UNLOCK; 1123 /* 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; 1124 /* PL_nop = PL_nop->op_next */
1052 1125
1053 /* inject a fake subroutine call to cctx_init */ 1126 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg); 1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055 1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
1132
1056 /* somebody or something will hit me for both perl_run and PL_restartop */ 1133 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op; 1134 PL_restartop = PL_op;
1058 perl_run (PL_curinterp); 1135 perl_run (PL_curinterp);
1059 1136
1060 /* 1137 /*
1061 * If perl-run returns we assume exit() was being called or the coro 1138 * 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) 1139 * 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 1140 * 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" 1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept 1142 * coroutine as Coro has no such concept
1066 */ 1143 */
1067 PL_top_env = main_top_env; 1144 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
1069} 1147}
1070 1148
1071static coro_cctx * 1149static coro_cctx *
1072cctx_new () 1150cctx_new ()
1073{ 1151{
1074 coro_cctx *cctx; 1152 coro_cctx *cctx;
1153
1154 ++cctx_count;
1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1075 void *stack_start; 1181 void *stack_start;
1076 size_t stack_size; 1182 size_t stack_size;
1077 1183
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP 1184#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */ 1186 /* 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); 1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086 1188
1087 if (cctx->sptr != (void *)-1) 1189 if (cctx->sptr != (void *)-1)
1088 { 1190 {
1089# if CORO_STACKGUARD 1191 #if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif 1193 #endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED; 1196 cctx->flags |= CC_MAPPED;
1095 } 1197 }
1096 else 1198 else
1097#endif 1199#endif
1098 { 1200 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long); 1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long); 1202 New (0, cctx->sptr, cctx_stacksize, long);
1101 1203
1102 if (!cctx->sptr) 1204 if (!cctx->sptr)
1103 { 1205 {
1104 perror ("FATAL: unable to allocate stack for coroutine"); 1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1105 _exit (EXIT_FAILURE); 1207 _exit (EXIT_FAILURE);
1106 } 1208 }
1107 1209
1108 stack_start = cctx->sptr; 1210 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize; 1211 stack_size = cctx->ssize;
1110 } 1212 }
1111 1213
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1216 #endif
1217
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114 1219
1115 return cctx; 1220 return cctx;
1116} 1221}
1117 1222
… …
1120{ 1225{
1121 if (!cctx) 1226 if (!cctx)
1122 return; 1227 return;
1123 1228
1124 --cctx_count; 1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1125 1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1126#if CORO_USE_VALGRIND 1235 #if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif 1237 #endif
1129 1238
1130#if HAVE_MMAP 1239#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED) 1240 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize); 1241 munmap (cctx->sptr, cctx->ssize);
1133 else 1242 else
1134#endif 1243#endif
1135 Safefree (cctx->sptr); 1244 Safefree (cctx->sptr);
1245 }
1136 1246
1137 Safefree (cctx); 1247 Safefree (cctx);
1138} 1248}
1139 1249
1140/* wether this cctx should be destructed */ 1250/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1142 1252
1143static coro_cctx * 1253static coro_cctx *
1144cctx_get (pTHX) 1254cctx_get (pTHX)
1145{ 1255{
1146 while (expect_true (cctx_first)) 1256 while (expect_true (cctx_first))
… …
1153 return cctx; 1263 return cctx;
1154 1264
1155 cctx_destroy (cctx); 1265 cctx_destroy (cctx);
1156 } 1266 }
1157 1267
1158 return cctx_new (); 1268 return cctx_new_run ();
1159} 1269}
1160 1270
1161static void 1271static void
1162cctx_put (coro_cctx *cctx) 1272cctx_put (coro_cctx *cctx)
1163{ 1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1164 /* free another cctx if overlimit */ 1276 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1277 if (expect_false (cctx_idle >= cctx_max_idle))
1166 { 1278 {
1167 coro_cctx *first = cctx_first; 1279 coro_cctx *first = cctx_first;
1168 cctx_first = first->next; 1280 cctx_first = first->next;
1169 --cctx_idle; 1281 --cctx_idle;
1170 1282
… …
1182transfer_check (pTHX_ struct coro *prev, struct coro *next) 1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{ 1295{
1184 if (expect_true (prev != next)) 1296 if (expect_true (prev != next))
1185 { 1297 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1298 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"); 1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1188 1300
1189 if (expect_false (next->flags & CF_RUNNING)) 1301 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"); 1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1191 1303
1192 if (expect_false (next->flags & CF_DESTROYED)) 1304 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"); 1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1194 1306
1195#if !PERL_VERSION_ATLEAST (5,10,0) 1307#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1308 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"); 1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1198#endif 1310#endif
1199 } 1311 }
1200} 1312}
1201 1313
1202/* always use the TRANSFER macro */ 1314/* always use the TRANSFER macro */
1203static void NOINLINE 1315static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{ 1317{
1206 dSTACKLEVEL; 1318 dSTACKLEVEL;
1207 static volatile int has_throw;
1208 1319
1209 /* sometimes transfer is only called to set idle_sp */ 1320 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next)) 1321 if (expect_false (!next))
1211 { 1322 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1323 ((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 */ 1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 } 1325 }
1215 else if (expect_true (prev != next)) 1326 else if (expect_true (prev != next))
1216 { 1327 {
1217 coro_cctx *prev__cctx; 1328 coro_cctx *prev__cctx;
1218 1329
1219 if (expect_false (prev->flags & CF_NEW)) 1330 if (expect_false (prev->flags & CF_NEW))
1220 { 1331 {
1221 /* create a new empty context */ 1332 /* create a new empty/source context */
1222 Newz (0, prev->cctx, 1, coro_cctx); 1333 prev->cctx = cctx_new_empty ();
1223 prev->flags &= ~CF_NEW; 1334 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING; 1335 prev->flags |= CF_RUNNING;
1225 } 1336 }
1226 1337
1227 prev->flags &= ~CF_RUNNING; 1338 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING; 1339 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231 1340
1232 /* first get rid of the old state */ 1341 /* first get rid of the old state */
1233 save_perl (aTHX_ prev); 1342 save_perl (aTHX_ prev);
1234 1343
1235 if (expect_false (next->flags & CF_NEW)) 1344 if (expect_false (next->flags & CF_NEW))
… …
1242 else 1351 else
1243 load_perl (aTHX_ next); 1352 load_perl (aTHX_ next);
1244 1353
1245 prev__cctx = prev->cctx; 1354 prev__cctx = prev->cctx;
1246 1355
1247 /* possibly "free" the cctx */ 1356 /* possibly untie and reuse the cctx */
1248 if (expect_true ( 1357 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL 1358 prev__cctx->idle_sp == (void *)stacklevel
1250 && !(prev__cctx->flags & CC_TRACE) 1359 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx 1360 && !force_cctx
1252 )) 1361 ))
1253 { 1362 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1363 /* 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)); 1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1256 1365
1257 prev->cctx = 0; 1366 prev->cctx = 0;
1258 1367
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1368 /* 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 */ 1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1268 ++next->usecount; 1377 ++next->usecount;
1269 1378
1270 if (expect_true (!next->cctx)) 1379 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX); 1380 next->cctx = cctx_get (aTHX);
1272 1381
1273 has_throw = !!next->throw; 1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1274 1384
1275 if (expect_false (prev__cctx != next->cctx)) 1385 if (expect_false (prev__cctx != next->cctx))
1276 { 1386 {
1277 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 } 1390 }
1281 1391
1282 free_coro_mortal (aTHX); 1392 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 } 1393 }
1298} 1394}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304 1395
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1396#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) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307 1398
1308/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
… …
1310static int 1401static int
1311coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
1312{ 1403{
1313 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
1314 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1315 1409
1316 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
1317 1411
1318 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
1319 { 1413 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready; 1416 --coro_nready;
1324 UNLOCK;
1325 } 1417 }
1326 else 1418 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328 1420
1329 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 { 1422 {
1331 struct coro temp; 1423 struct coro temp;
1332 1424
1333 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335 1426
1336 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
1338 1429
1339 coro_destroy (aTHX_ coro); 1430 coro_destruct (aTHX_ coro);
1340 1431
1341 load_perl (aTHX_ &temp); 1432 load_perl (aTHX_ &temp);
1342 1433
1343 coro->slot = 0; 1434 coro->slot = 0;
1344 } 1435 }
… …
1390# define MGf_DUP 0 1481# define MGf_DUP 0
1391#endif 1482#endif
1392}; 1483};
1393 1484
1394static void 1485static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{ 1487{
1397 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta); 1490 TRANSFER_CHECK (*ta);
1400} 1491}
1401 1492
1402static void 1493static void
1403api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1404{ 1495{
1405 dTHX;
1406 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1407 1497
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1); 1499 TRANSFER (ta, 1);
1410} 1500}
1411 1501
1412/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1413 1503
1414static void 1504INLINE void
1415coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1416{ 1506{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1418} 1508}
1419 1509
1420static SV * 1510INLINE SV *
1421coro_deq (pTHX) 1511coro_deq (pTHX)
1422{ 1512{
1423 int prio; 1513 int prio;
1424 1514
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1428 1518
1429 return 0; 1519 return 0;
1430} 1520}
1431 1521
1432static int 1522static int
1433api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1434{ 1524{
1435 dTHX;
1436 struct coro *coro; 1525 struct coro *coro;
1437 SV *sv_hook; 1526 SV *sv_hook;
1438 void (*xs_hook)(void); 1527 void (*xs_hook)(void);
1439 1528
1440 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
… …
1445 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1446 return 0; 1535 return 0;
1447 1536
1448 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1449 1538
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454 1541
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1542 coro_enq (aTHX_ coro);
1456 ++coro_nready; 1543 ++coro_nready;
1457 1544
1458 UNLOCK;
1459
1460 if (sv_hook) 1545 if (sv_hook)
1461 { 1546 {
1462 dSP; 1547 dSP;
1463 1548
1464 ENTER; 1549 ENTER;
… …
1478 1563
1479 return 1; 1564 return 1;
1480} 1565}
1481 1566
1482static int 1567static int
1483api_is_ready (SV *coro_sv) 1568api_is_ready (pTHX_ SV *coro_sv)
1484{ 1569{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487} 1571}
1488 1572
1489static void 1573INLINE void
1490prepare_schedule (pTHX_ struct transfer_args *ta) 1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1491{ 1575{
1492 SV *prev_sv, *next_sv; 1576 SV *prev_sv, *next_sv;
1493 1577
1494 for (;;) 1578 for (;;)
1495 { 1579 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX); 1580 next_sv = coro_deq (aTHX);
1498 1581
1499 /* nothing to schedule: call the idle handler */ 1582 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv)) 1583 if (expect_false (!next_sv))
1501 { 1584 {
1502 dSP; 1585 dSP;
1503 UNLOCK;
1504 1586
1505 ENTER; 1587 ENTER;
1506 SAVETMPS; 1588 SAVETMPS;
1507 1589
1508 PUSHMARK (SP); 1590 PUSHMARK (SP);
… …
1513 FREETMPS; 1595 FREETMPS;
1514 LEAVE; 1596 LEAVE;
1515 continue; 1597 continue;
1516 } 1598 }
1517 1599
1518 ta->next = SvSTATE (next_sv); 1600 ta->next = SvSTATE_hv (next_sv);
1519 1601
1520 /* cannot transfer to destroyed coros, skip and look for next */ 1602 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED)) 1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 { 1604 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv); 1605 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */ 1606 /* coro_nready has already been taken care of by destroy */
1526 continue; 1607 continue;
1527 } 1608 }
1528 1609
1529 --coro_nready; 1610 --coro_nready;
1530 UNLOCK;
1531 break; 1611 break;
1532 } 1612 }
1533 1613
1534 /* free this only after the transfer */ 1614 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current); 1615 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv); 1616 ta->prev = SvSTATE_hv (prev_sv);
1537 TRANSFER_CHECK (*ta); 1617 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY); 1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1539 ta->next->flags &= ~CF_READY; 1619 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv); 1620 SvRV_set (coro_current, next_sv);
1541 1621
1542 LOCK;
1543 free_coro_mortal (aTHX); 1622 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv; 1623 coro_mortal = prev_sv;
1545 UNLOCK;
1546} 1624}
1547 1625
1548static void 1626INLINE void
1549prepare_cede (pTHX_ struct transfer_args *ta) 1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1550{ 1628{
1551 api_ready (coro_current); 1629 api_ready (aTHX_ coro_current);
1552 prepare_schedule (aTHX_ ta); 1630 prepare_schedule (aTHX_ ta);
1553} 1631}
1554 1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1555static int 1656static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta) 1657api_cede (pTHX)
1557{ 1658{
1558 if (coro_nready) 1659 struct coro_transfer_args ta;
1559 { 1660
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta); 1661 prepare_cede (aTHX_ &ta);
1562 api_ready (prev); 1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1563 return 1; 1666 return 1;
1564 } 1667 }
1565 else 1668 else
1566 return 0; 1669 return 0;
1567} 1670}
1568 1671
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 1672static int
1580api_cede (void) 1673api_cede_notself (pTHX)
1581{ 1674{
1582 dTHX; 1675 if (coro_nready)
1676 {
1583 struct transfer_args ta; 1677 struct coro_transfer_args ta;
1584 1678
1585 prepare_cede (aTHX_ &ta); 1679 prepare_cede_notself (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1); 1680 TRANSFER (ta, 1);
1590 return 1; 1681 return 1;
1591 } 1682 }
1592 else 1683 else
1593 return 0; 1684 return 0;
1594} 1685}
1595 1686
1596static int 1687static 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) 1688api_trace (pTHX_ SV *coro_sv, int flags)
1613{ 1689{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv); 1690 struct coro *coro = SvSTATE (coro_sv);
1616 1691
1617 if (flags & CC_TRACE) 1692 if (flags & CC_TRACE)
1618 { 1693 {
1619 if (!coro->cctx) 1694 if (!coro->cctx)
1620 coro->cctx = cctx_new (); 1695 coro->cctx = cctx_new_run ();
1621 else if (!(coro->cctx->flags & CC_TRACE)) 1696 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack"); 1697 croak ("cannot enable tracing on coroutine with custom stack,");
1623 1698
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 } 1700 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 { 1702 {
… …
1632 else 1707 else
1633 coro->slot->runops = RUNOPS_DEFAULT; 1708 coro->slot->runops = RUNOPS_DEFAULT;
1634 } 1709 }
1635} 1710}
1636 1711
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/*****************************************************************************/ 1712/*****************************************************************************/
1654/* PerlIO::cede */ 1713/* PerlIO::cede */
1655 1714
1656typedef struct 1715typedef struct
1657{ 1716{
… …
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime (); 1744 double now = nvtime ();
1686 1745
1687 if (now >= self->next) 1746 if (now >= self->next)
1688 { 1747 {
1689 api_cede (); 1748 api_cede (aTHX);
1690 self->next = now + self->every; 1749 self->next = now + self->every;
1691 } 1750 }
1692 1751
1693 return PerlIOBuf_flush (f); 1752 return PerlIOBuf_flush (aTHX_ f);
1694} 1753}
1695 1754
1696static PerlIO_funcs PerlIO_cede = 1755static PerlIO_funcs PerlIO_cede =
1697{ 1756{
1698 sizeof(PerlIO_funcs), 1757 sizeof(PerlIO_funcs),
… …
1723 PerlIOBuf_get_ptr, 1782 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt, 1783 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt, 1784 PerlIOBuf_set_ptrcnt,
1726}; 1785};
1727 1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
1943 {
1944 if (sp == bot)
1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
1948 }
1949
1950 PUTBACK;
1951 }
1952
1953 return NORMAL;
1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as are expected to lock */
2001 while (count > 0 && AvFILLp (av) > 0)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some other waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2038 return 0;
2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
2046
2047 for (i = 1; i <= AvFILLp (av); ++i)
2048 if (AvARRAY (av)[i] == SvRV (coro_current))
2049 return 1;
2050
2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2052 return 1;
2053 }
2054}
2055
2056static void
2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 AV *av = (AV *)SvRV (arg [0]);
2060
2061 if (SvIVX (AvARRAY (av)[0]) > 0)
2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2066 }
2067 else
2068 {
2069 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2070
2071 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2072 frame->prepare = prepare_schedule;
2073
2074 /* to avoid race conditions when a woken-up coro gets terminated */
2075 /* we arrange for a temporary on_destroy that calls adjust (0) */
2076 assert (!SvSTATE_current->on_destroy);//D
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
2079
2080 frame->check = slf_check_semaphore_down;
2081
2082}
2083
2084/*****************************************************************************/
2085
2086#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2087
2088/* create a closure from XS, returns a code reference */
2089/* the arg can be accessed via GENSUB_ARG from the callback */
2090/* the callback must use dXSARGS/XSRETURN */
2091static SV *
2092gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2093{
2094 CV *cv = (CV *)NEWSV (0, 0);
2095
2096 sv_upgrade ((SV *)cv, SVt_PVCV);
2097
2098 CvANON_on (cv);
2099 CvISXSUB_on (cv);
2100 CvXSUB (cv) = xsub;
2101 GENSUB_ARG = arg;
2102
2103 return newRV_noinc ((SV *)cv);
2104}
2105
2106/*****************************************************************************/
1728 2107
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2108MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730 2109
1731PROTOTYPES: DISABLE 2110PROTOTYPES: DISABLE
1732 2111
1733BOOT: 2112BOOT:
1734{ 2113{
1735#ifdef USE_ITHREADS 2114#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex); 2115# if CORO_PTHREAD
2116 coro_thx = PERL_GET_CONTEXT;
2117# endif
1737#endif 2118#endif
1738 BOOT_PAGESIZE; 2119 BOOT_PAGESIZE;
1739 2120
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1759 main_top_env = PL_top_env; 2140 main_top_env = PL_top_env;
1760 2141
1761 while (main_top_env->je_prev) 2142 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev; 2143 main_top_env = main_top_env->je_prev;
1763 2144
2145 {
2146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2147
2148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2149 hv_store_ent (PL_custom_op_names, slf,
2150 newSVpv ("coro_slf", 0), 0);
2151
2152 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2153 hv_store_ent (PL_custom_op_descs, slf,
2154 newSVpv ("coro schedule like function", 0), 0);
2155 }
2156
1764 coroapi.ver = CORO_API_VERSION; 2157 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION; 2158 coroapi.rev = CORO_API_REVISION;
2159
1766 coroapi.transfer = api_transfer; 2160 coroapi.transfer = api_transfer;
2161
2162 coroapi.sv_state = SvSTATE_;
2163 coroapi.execute_slf = api_execute_slf;
2164 coroapi.prepare_nop = prepare_nop;
2165 coroapi.prepare_schedule = prepare_schedule;
2166 coroapi.prepare_cede = prepare_cede;
2167 coroapi.prepare_cede_notself = prepare_cede_notself;
1767 2168
1768 { 2169 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2170 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770 2171
1771 if (!svp) croak ("Time::HiRes is required"); 2172 if (!svp) croak ("Time::HiRes is required");
… …
1804 av_push (coro->args, newSVsv (ST (i))); 2205 av_push (coro->args, newSVsv (ST (i)));
1805} 2206}
1806 OUTPUT: 2207 OUTPUT:
1807 RETVAL 2208 RETVAL
1808 2209
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 2210void
1813_set_stacklevel (...) 2211_set_stacklevel (...)
1814 ALIAS: 2212 CODE:
1815 Coro::State::transfer = 1 2213 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1816 Coro::schedule = 2
1817 Coro::cede = 3
1818 Coro::cede_notself = 4
1819 CODE:
1820{
1821 struct transfer_args ta;
1822 2214
1823 PUTBACK; 2215void
1824 switch (ix) 2216transfer (...)
1825 { 2217 PROTOTYPE: $$
1826 case 0: 2218 CODE:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2219 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
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 2220
1861bool 2221bool
1862_destroy (SV *coro_sv) 2222_destroy (SV *coro_sv)
1863 CODE: 2223 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2224 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1871 CODE: 2231 CODE:
1872 _exit (code); 2232 _exit (code);
1873 2233
1874int 2234int
1875cctx_stacksize (int new_stacksize = 0) 2235cctx_stacksize (int new_stacksize = 0)
2236 PROTOTYPE: ;$
1876 CODE: 2237 CODE:
1877 RETVAL = coro_stacksize; 2238 RETVAL = cctx_stacksize;
1878 if (new_stacksize) 2239 if (new_stacksize)
2240 {
1879 coro_stacksize = new_stacksize; 2241 cctx_stacksize = new_stacksize;
2242 ++cctx_gen;
2243 }
1880 OUTPUT: 2244 OUTPUT:
1881 RETVAL 2245 RETVAL
1882 2246
1883int 2247int
2248cctx_max_idle (int max_idle = 0)
2249 PROTOTYPE: ;$
2250 CODE:
2251 RETVAL = cctx_max_idle;
2252 if (max_idle > 1)
2253 cctx_max_idle = max_idle;
2254 OUTPUT:
2255 RETVAL
2256
2257int
1884cctx_count () 2258cctx_count ()
2259 PROTOTYPE:
1885 CODE: 2260 CODE:
1886 RETVAL = cctx_count; 2261 RETVAL = cctx_count;
1887 OUTPUT: 2262 OUTPUT:
1888 RETVAL 2263 RETVAL
1889 2264
1890int 2265int
1891cctx_idle () 2266cctx_idle ()
2267 PROTOTYPE:
1892 CODE: 2268 CODE:
1893 RETVAL = cctx_idle; 2269 RETVAL = cctx_idle;
1894 OUTPUT: 2270 OUTPUT:
1895 RETVAL 2271 RETVAL
1896 2272
1897void 2273void
1898list () 2274list ()
2275 PROTOTYPE:
1899 PPCODE: 2276 PPCODE:
1900{ 2277{
1901 struct coro *coro; 2278 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next) 2279 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv) 2280 if (coro->hv)
… …
1962 RETVAL = boolSV (coro->flags & ix); 2339 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT: 2340 OUTPUT:
1964 RETVAL 2341 RETVAL
1965 2342
1966void 2343void
2344throw (Coro::State self, SV *throw = &PL_sv_undef)
2345 PROTOTYPE: $;$
2346 CODE:
2347 SvREFCNT_dec (self->throw);
2348 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2349
2350void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2351api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2352 PROTOTYPE: $;$
2353 C_ARGS: aTHX_ coro, flags
1968 2354
1969SV * 2355SV *
1970has_cctx (Coro::State coro) 2356has_cctx (Coro::State coro)
1971 PROTOTYPE: $ 2357 PROTOTYPE: $
1972 CODE: 2358 CODE:
… …
1980 CODE: 2366 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2367 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT: 2368 OUTPUT:
1983 RETVAL 2369 RETVAL
1984 2370
1985IV 2371UV
1986rss (Coro::State coro) 2372rss (Coro::State coro)
1987 PROTOTYPE: $ 2373 PROTOTYPE: $
1988 ALIAS: 2374 ALIAS:
1989 usecount = 1 2375 usecount = 1
1990 CODE: 2376 CODE:
… …
1996 OUTPUT: 2382 OUTPUT:
1997 RETVAL 2383 RETVAL
1998 2384
1999void 2385void
2000force_cctx () 2386force_cctx ()
2387 PROTOTYPE:
2001 CODE: 2388 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0; 2389 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 2390
2012void 2391void
2013swap_defsv (Coro::State self) 2392swap_defsv (Coro::State self)
2014 PROTOTYPE: $ 2393 PROTOTYPE: $
2015 ALIAS: 2394 ALIAS:
2016 swap_defav = 1 2395 swap_defav = 1
2017 CODE: 2396 CODE:
2018 if (!self->slot) 2397 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state"); 2398 croak ("cannot swap state with coroutine that has no saved state,");
2020 else 2399 else
2021 { 2400 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2401 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2402 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024 2403
… …
2049 2428
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2429 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV (); 2430 coro_ready[i] = newAV ();
2052 2431
2053 { 2432 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE); 2433 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056 2434
2057 coroapi.schedule = api_schedule; 2435 coroapi.schedule = api_schedule;
2058 coroapi.cede = api_cede; 2436 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself; 2437 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready; 2438 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready; 2439 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready; 2440 coroapi.nready = coro_nready;
2063 coroapi.current = coro_current; 2441 coroapi.current = coro_current;
2064 2442
2065 GCoroAPI = &coroapi; 2443 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi); 2444 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv); 2445 SvREADONLY_on (sv);
2068 } 2446 }
2069} 2447}
2448
2449void
2450schedule (...)
2451 CODE:
2452 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2453
2454void
2455cede (...)
2456 CODE:
2457 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2458
2459void
2460cede_notself (...)
2461 CODE:
2462 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2070 2463
2071void 2464void
2072_set_current (SV *current) 2465_set_current (SV *current)
2073 PROTOTYPE: $ 2466 PROTOTYPE: $
2074 CODE: 2467 CODE:
2075 SvREFCNT_dec (SvRV (coro_current)); 2468 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2469 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2077 2470
2078void 2471void
2079_set_readyhook (SV *hook) 2472_set_readyhook (SV *hook)
2080 PROTOTYPE: $ 2473 PROTOTYPE: $
2081 CODE: 2474 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook); 2475 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2476 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086 2477
2087int 2478int
2088prio (Coro::State coro, int newprio = 0) 2479prio (Coro::State coro, int newprio = 0)
2480 PROTOTYPE: $;$
2089 ALIAS: 2481 ALIAS:
2090 nice = 1 2482 nice = 1
2091 CODE: 2483 CODE:
2092{ 2484{
2093 RETVAL = coro->prio; 2485 RETVAL = coro->prio;
… …
2108 2500
2109SV * 2501SV *
2110ready (SV *self) 2502ready (SV *self)
2111 PROTOTYPE: $ 2503 PROTOTYPE: $
2112 CODE: 2504 CODE:
2113 RETVAL = boolSV (api_ready (self)); 2505 RETVAL = boolSV (api_ready (aTHX_ self));
2114 OUTPUT: 2506 OUTPUT:
2115 RETVAL 2507 RETVAL
2116 2508
2117int 2509int
2118nready (...) 2510nready (...)
… …
2125# for async_pool speedup 2517# for async_pool speedup
2126void 2518void
2127_pool_1 (SV *cb) 2519_pool_1 (SV *cb)
2128 CODE: 2520 CODE:
2129{ 2521{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current); 2522 HV *hv = (HV *)SvRV (coro_current);
2523 struct coro *coro = SvSTATE_hv ((SV *)hv);
2132 AV *defav = GvAV (PL_defgv); 2524 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2525 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av; 2526 AV *invoke_av;
2135 int i, len; 2527 int i, len;
2136 2528
… …
2141 SvREFCNT_dec (old); 2533 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n"); 2534 croak ("\3async_pool terminate\2\n");
2143 } 2535 }
2144 2536
2145 SvREFCNT_dec (coro->saved_deffh); 2537 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2538 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2147 2539
2148 hv_store (hv, "desc", sizeof ("desc") - 1, 2540 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2541 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150 2542
2151 invoke_av = (AV *)SvRV (invoke); 2543 invoke_av = (AV *)SvRV (invoke);
… …
2155 2547
2156 if (len > 0) 2548 if (len > 0)
2157 { 2549 {
2158 av_fill (defav, len - 1); 2550 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i) 2551 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2552 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2161 } 2553 }
2162
2163 SvREFCNT_dec (invoke);
2164} 2554}
2165 2555
2166void 2556void
2167_pool_2 (SV *cb) 2557_pool_2 (SV *cb)
2168 CODE: 2558 CODE:
2169{ 2559{
2170 struct coro *coro = SvSTATE (coro_current); 2560 struct coro *coro = SvSTATE_current;
2171 2561
2172 sv_setsv (cb, &PL_sv_undef); 2562 sv_setsv (cb, &PL_sv_undef);
2173 2563
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2564 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0; 2565 coro->saved_deffh = 0;
2176 2566
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2567 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2568 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 { 2569 {
2180 SV *old = PL_diehook; 2570 SV *old = PL_diehook;
2181 PL_diehook = 0; 2571 PL_diehook = 0;
2182 SvREFCNT_dec (old); 2572 SvREFCNT_dec (old);
… …
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2578 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189 2579
2190 coro->prio = 0; 2580 coro->prio = 0;
2191 2581
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2582 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0); 2583 api_trace (aTHX_ coro_current, 0);
2194 2584
2195 av_push (av_async_pool, newSVsv (coro_current)); 2585 av_push (av_async_pool, newSVsv (coro_current));
2196} 2586}
2197 2587
2198#if 0 2588
2589MODULE = Coro::State PACKAGE = Coro::AIO
2199 2590
2200void 2591void
2201_generator_call (...) 2592_get_state (SV *self)
2202 PROTOTYPE: @ 2593 PROTOTYPE: $
2203 PPCODE: 2594 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{ 2595{
2213 struct coro *coro; 2596 AV *defav = GvAV (PL_defgv);
2214 MAGIC *mg; 2597 AV *av = newAV ();
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i; 2598 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)); 2599 SV *data_sv = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL); 2600 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2257 SvCUR_set (RETVAL, sizeof (struct io_state)); 2601 SvCUR_set (data_sv, sizeof (struct io_state));
2258 SvPOK_only (RETVAL); 2602 SvPOK_only (data_sv);
2259 2603
2260 data->errorno = errno; 2604 data->errorno = errno;
2261 data->laststype = PL_laststype; 2605 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval; 2606 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache; 2607 data->statcache = PL_statcache;
2608
2609 av_extend (av, AvFILLp (defav) + 1 + 1);
2610
2611 for (i = 0; i <= AvFILLp (defav); ++i)
2612 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2613
2614 av_push (av, data_sv);
2615
2616 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2617
2618 api_ready (aTHX_ self);
2264} 2619}
2265 OUTPUT:
2266 RETVAL
2267 2620
2268void 2621void
2269_set_state (char *data_) 2622_set_state (SV *state)
2270 PROTOTYPE: $ 2623 PROTOTYPE: $
2271 CODE: 2624 PPCODE:
2272{ 2625{
2273 struct io_state *data = (void *)data_; 2626 AV *av = (AV *)SvRV (state);
2627 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2628 int i;
2274 2629
2275 errno = data->errorno; 2630 errno = data->errorno;
2276 PL_laststype = data->laststype; 2631 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval; 2632 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache; 2633 PL_statcache = data->statcache;
2634
2635 EXTEND (SP, AvFILLp (av));
2636 for (i = 0; i < AvFILLp (av); ++i)
2637 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2279} 2638}
2280 2639
2281 2640
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent 2641MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283 2642
2284BOOT: 2643BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286 2645
2287SV * 2646void
2288_schedule (...) 2647_schedule (...)
2289 PROTOTYPE: @
2290 CODE: 2648 CODE:
2291{ 2649{
2292 static int incede; 2650 static int incede;
2293 2651
2294 api_cede_notself (); 2652 api_cede_notself (aTHX);
2295 2653
2296 ++incede; 2654 ++incede;
2297 while (coro_nready >= incede && api_cede ()) 2655 while (coro_nready >= incede && api_cede (aTHX))
2298 ; 2656 ;
2299 2657
2300 sv_setsv (sv_activity, &PL_sv_undef); 2658 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede) 2659 if (coro_nready >= incede)
2302 { 2660 {
… …
2312 2670
2313MODULE = Coro::State PACKAGE = PerlIO::cede 2671MODULE = Coro::State PACKAGE = PerlIO::cede
2314 2672
2315BOOT: 2673BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2674 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2675
2676MODULE = Coro::State PACKAGE = Coro::Semaphore
2677
2678SV *
2679new (SV *klass, SV *count_ = 0)
2680 CODE:
2681{
2682 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2683 AV *av = newAV ();
2684 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2685 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2686}
2687 OUTPUT:
2688 RETVAL
2689
2690SV *
2691count (SV *self)
2692 CODE:
2693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2694 OUTPUT:
2695 RETVAL
2696
2697void
2698up (SV *self, int adjust = 1)
2699 ALIAS:
2700 adjust = 1
2701 CODE:
2702 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2703
2704void
2705down (SV *self)
2706 CODE:
2707 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2708
2709void
2710try (SV *self)
2711 PPCODE:
2712{
2713 AV *av = (AV *)SvRV (self);
2714 SV *count_sv = AvARRAY (av)[0];
2715 IV count = SvIVX (count_sv);
2716
2717 if (count > 0)
2718 {
2719 --count;
2720 SvIVX (count_sv) = count;
2721 XSRETURN_YES;
2722 }
2723 else
2724 XSRETURN_NO;
2725}
2726
2727void
2728waiters (SV *self)
2729 CODE:
2730{
2731 AV *av = (AV *)SvRV (self);
2732
2733 if (GIMME_V == G_SCALAR)
2734 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2735 else
2736 {
2737 int i;
2738 EXTEND (SP, AvFILLp (av) + 1 - 1);
2739 for (i = 1; i <= AvFILLp (av); ++i)
2740 PUSHs (newSVsv (AvARRAY (av)[i]));
2741 }
2742}
2743

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