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Comparing Coro/Coro/State.xs (file contents):
Revision 1.248 by root, Mon Sep 29 12:40:50 2008 UTC vs.
Revision 1.283 by root, Sun Nov 16 11:12:57 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 /* process 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
274static struct CoroSLF slf_frame; /* the current slf frame */
264 275
265/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
266 277
267#define PRIO_MAX 3 278#define PRIO_MAX 3
268#define PRIO_HIGH 1 279#define PRIO_HIGH 1
… …
272#define PRIO_MIN -4 283#define PRIO_MIN -4
273 284
274/* for Coro.pm */ 285/* for Coro.pm */
275static SV *coro_current; 286static SV *coro_current;
276static SV *coro_readyhook; 287static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
278static int coro_nready;
279static struct coro *coro_first; 289static struct coro *coro_first;
290#define coro_nready coroapi.nready
280 291
281/** lowlevel stuff **********************************************************/ 292/** lowlevel stuff **********************************************************/
282 293
283static SV * 294static SV *
284coro_get_sv (pTHX_ const char *name, int create) 295coro_get_sv (pTHX_ const char *name, int create)
… …
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 335 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif 336#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 337 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist); 338 --AvFILLp (padlist);
328 339
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 340 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
330 av_store (newpadlist, 1, (SV *)newpad); 341 av_store (newpadlist, 1, (SV *)newpad);
331 342
332 return newpadlist; 343 return newpadlist;
333} 344}
334 345
… …
377static MGVTBL coro_cv_vtbl = { 388static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0, 389 0, 0, 0, 0,
379 coro_cv_free 390 coro_cv_free
380}; 391};
381 392
382#define CORO_MAGIC(sv,type) \ 393#define CORO_MAGIC(sv, type) \
383 SvMAGIC (sv) \ 394 expect_true (SvMAGIC (sv)) \
384 ? SvMAGIC (sv)->mg_type == type \ 395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
385 ? SvMAGIC (sv) \ 396 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \ 397 : mg_find (sv, type) \
387 : 0 398 : 0
388 399
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 400#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) 401#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391 402
392static struct coro * 403INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro) 404SvSTATE_ (pTHX_ SV *coro)
394{ 405{
395 HV *stash; 406 HV *stash;
396 MAGIC *mg; 407 MAGIC *mg;
397 408
… …
412 mg = CORO_MAGIC_state (coro); 423 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr; 424 return (struct coro *)mg->mg_ptr;
414} 425}
415 426
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 427#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
428
429/* fastert than SvSTATE, but expects a coroutine hv */
430INLINE struct coro *
431SvSTATE_hv (SV *sv)
432{
433 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
434 ? SvMAGIC (sv)
435 : mg_find (sv, CORO_MAGIC_type_state);
436
437 return (struct coro *)mg->mg_ptr;
438}
439
440#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
417 441
418/* the next two functions merely cache the padlists */ 442/* the next two functions merely cache the padlists */
419static void 443static void
420get_padlist (pTHX_ CV *cv) 444get_padlist (pTHX_ CV *cv)
421{ 445{
… …
488 CvPADLIST (cv) = (AV *)POPs; 512 CvPADLIST (cv) = (AV *)POPs;
489 } 513 }
490 514
491 PUTBACK; 515 PUTBACK;
492 } 516 }
517
518 slf_frame = c->slf_frame;
493} 519}
494 520
495static void 521static void
496save_perl (pTHX_ Coro__State c) 522save_perl (pTHX_ Coro__State c)
497{ 523{
524 c->slf_frame = slf_frame;
525
498 { 526 {
499 dSP; 527 dSP;
500 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
501 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
502 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
569 #undef VAR 597 #undef VAR
570 } 598 }
571} 599}
572 600
573/* 601/*
574 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
575 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
578 */ 606 */
579#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
… …
622 650
623/* 651/*
624 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
625 */ 653 */
626static void 654static void
627coro_destroy_stacks (pTHX) 655coro_destruct_stacks (pTHX)
628{ 656{
629 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
631 659
632 while (PL_curstackinfo) 660 while (PL_curstackinfo)
… …
781 809
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783} 811}
784 812
785static void 813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static void
786coro_setup (pTHX_ struct coro *coro) 827coro_setup (pTHX_ struct coro *coro)
787{ 828{
788 /* 829 /*
789 * emulate part of the perl startup here. 830 * emulate part of the perl startup here.
790 */ 831 */
… …
810 GvSV (PL_defgv) = newSV (0); 851 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0; 852 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0); 853 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 854 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv)); 855 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 856 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
816 857
817 { 858 {
818 dSP; 859 dSP;
819 LOGOP myop; 860 UNOP myop;
820 861
821 Zero (&myop, 1, LOGOP); 862 Zero (&myop, 1, UNOP);
822 myop.op_next = Nullop; 863 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID; 864 myop.op_flags = OPf_WANT_VOID;
824 865
825 PUSHMARK (SP); 866 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 867 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN; 871 SPAGAIN;
831 } 872 }
832 873
833 /* this newly created coroutine might be run on an existing cctx which most 874 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub. 875 * 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 */ 876 */
838 ENTER; 877 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
878 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
839} 879}
840 880
841static void 881static void
842coro_destroy (pTHX_ struct coro *coro) 882coro_destruct (pTHX_ struct coro *coro)
843{ 883{
844 if (!IN_DESTRUCT) 884 if (!IN_DESTRUCT)
845 { 885 {
846 /* restore all saved variables and stuff */ 886 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0); 887 LEAVE_SCOPE (0);
… …
869 SvREFCNT_dec (PL_warnhook); 909 SvREFCNT_dec (PL_warnhook);
870 910
871 SvREFCNT_dec (coro->saved_deffh); 911 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw); 912 SvREFCNT_dec (coro->throw);
873 913
874 coro_destroy_stacks (aTHX); 914 coro_destruct_stacks (aTHX);
875} 915}
876 916
877static void 917INLINE void
878free_coro_mortal (pTHX) 918free_coro_mortal (pTHX)
879{ 919{
880 if (expect_true (coro_mortal)) 920 if (expect_true (coro_mortal))
881 { 921 {
882 SvREFCNT_dec (coro_mortal); 922 SvREFCNT_dec (coro_mortal);
… …
887static int 927static int
888runops_trace (pTHX) 928runops_trace (pTHX)
889{ 929{
890 COP *oldcop = 0; 930 COP *oldcop = 0;
891 int oldcxix = -2; 931 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 932 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx; 933 coro_cctx *cctx = coro->cctx;
894 934
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 { 936 {
897 PERL_ASYNC_CHECK (); 937 PERL_ASYNC_CHECK ();
… …
916 : cx->blk_gimme == G_SCALAR ? bot + 1 956 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot; 957 : bot;
918 958
919 av_extend (av, top - bot); 959 av_extend (av, top - bot);
920 while (bot < top) 960 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++)); 961 av_push (av, SvREFCNT_inc_NN (*bot++));
922 962
923 PL_runops = RUNOPS_DEFAULT; 963 PL_runops = RUNOPS_DEFAULT;
924 ENTER; 964 ENTER;
925 SAVETMPS; 965 SAVETMPS;
926 EXTEND (SP, 3); 966 EXTEND (SP, 3);
… …
1006 1046
1007 TAINT_NOT; 1047 TAINT_NOT;
1008 return 0; 1048 return 0;
1009} 1049}
1010 1050
1051static void
1052prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1053{
1054 ta->prev = (struct coro *)cctx;
1055 ta->next = 0;
1056}
1057
1011/* inject a fake call to Coro::State::_cctx_init into the execution */ 1058/* 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 */ 1059/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */ 1060/* during execution of a perl program */
1061/* also initialises PL_top_env */
1014static void NOINLINE 1062static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx) 1063cctx_prepare (pTHX_ coro_cctx *cctx)
1016{ 1064{
1017 dSP; 1065 dSP;
1018 LOGOP myop; 1066 UNOP myop;
1019 1067
1020 PL_top_env = &PL_start_env; 1068 PL_top_env = &PL_start_env;
1021 1069
1022 if (cctx->flags & CC_TRACE) 1070 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace; 1071 PL_runops = runops_trace;
1024 1072
1025 Zero (&myop, 1, LOGOP); 1073 Zero (&myop, 1, UNOP);
1026 myop.op_next = PL_op; 1074 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1075 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028 1076
1029 PUSHMARK (SP); 1077 PUSHMARK (SP);
1030 EXTEND (SP, 2); 1078 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1079 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1080 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK; 1081 PUTBACK;
1034 PL_op = (OP *)&myop; 1082 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1083 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN; 1084 SPAGAIN;
1037} 1085}
1038 1086
1087/* the tail of transfer: execute stuff we can only do after a transfer */
1088INLINE void
1089transfer_tail (pTHX)
1090{
1091 free_coro_mortal (aTHX);
1092}
1093
1039/* 1094/*
1040 * this is a _very_ stripped down perl interpreter ;) 1095 * this is a _very_ stripped down perl interpreter ;)
1041 */ 1096 */
1042static void 1097static void
1043cctx_run (void *arg) 1098cctx_run (void *arg)
1044{ 1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1045 dTHX; 1106 dTHX;
1046 1107
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1108 /* normally we would need to skip the entersub here */
1048 UNLOCK; 1109 /* 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; 1110 /* PL_nop = PL_nop->op_next */
1052 1111
1053 /* inject a fake subroutine call to cctx_init */ 1112 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg); 1113 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055 1114
1115 /* cctx_run is the alternative tail of transfer() */
1116 transfer_tail (aTHX);
1117
1056 /* somebody or something will hit me for both perl_run and PL_restartop */ 1118 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op; 1119 PL_restartop = PL_op;
1058 perl_run (PL_curinterp); 1120 perl_run (PL_curinterp);
1059 1121
1060 /* 1122 /*
1061 * If perl-run returns we assume exit() was being called or the coro 1123 * 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) 1124 * 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 1125 * 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" 1126 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept 1127 * coroutine as Coro has no such concept
1066 */ 1128 */
1067 PL_top_env = main_top_env; 1129 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1130 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1131 }
1069} 1132}
1070 1133
1071static coro_cctx * 1134static coro_cctx *
1072cctx_new () 1135cctx_new ()
1073{ 1136{
1074 coro_cctx *cctx; 1137 coro_cctx *cctx;
1138
1139 ++cctx_count;
1140 New (0, cctx, 1, coro_cctx);
1141
1142 cctx->gen = cctx_gen;
1143 cctx->flags = 0;
1144 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1145
1146 return cctx;
1147}
1148
1149/* create a new cctx only suitable as source */
1150static coro_cctx *
1151cctx_new_empty ()
1152{
1153 coro_cctx *cctx = cctx_new ();
1154
1155 cctx->sptr = 0;
1156 coro_create (&cctx->cctx, 0, 0, 0, 0);
1157
1158 return cctx;
1159}
1160
1161/* create a new cctx suitable as destination/running a perl interpreter */
1162static coro_cctx *
1163cctx_new_run ()
1164{
1165 coro_cctx *cctx = cctx_new ();
1075 void *stack_start; 1166 void *stack_start;
1076 size_t stack_size; 1167 size_t stack_size;
1077 1168
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP 1169#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1170 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */ 1171 /* 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); 1172 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086 1173
1087 if (cctx->sptr != (void *)-1) 1174 if (cctx->sptr != (void *)-1)
1088 { 1175 {
1089# if CORO_STACKGUARD 1176 #if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1177 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif 1178 #endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1179 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1180 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED; 1181 cctx->flags |= CC_MAPPED;
1095 } 1182 }
1096 else 1183 else
1097#endif 1184#endif
1098 { 1185 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long); 1186 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long); 1187 New (0, cctx->sptr, cctx_stacksize, long);
1101 1188
1102 if (!cctx->sptr) 1189 if (!cctx->sptr)
1103 { 1190 {
1104 perror ("FATAL: unable to allocate stack for coroutine"); 1191 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1105 _exit (EXIT_FAILURE); 1192 _exit (EXIT_FAILURE);
1106 } 1193 }
1107 1194
1108 stack_start = cctx->sptr; 1195 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize; 1196 stack_size = cctx->ssize;
1110 } 1197 }
1111 1198
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1199 #if CORO_USE_VALGRIND
1200 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1201 #endif
1202
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1203 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114 1204
1115 return cctx; 1205 return cctx;
1116} 1206}
1117 1207
… …
1120{ 1210{
1121 if (!cctx) 1211 if (!cctx)
1122 return; 1212 return;
1123 1213
1124 --cctx_count; 1214 --cctx_count;
1215 coro_destroy (&cctx->cctx);
1125 1216
1217 /* coro_transfer creates new, empty cctx's */
1218 if (cctx->sptr)
1219 {
1126#if CORO_USE_VALGRIND 1220 #if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1221 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif 1222 #endif
1129 1223
1130#if HAVE_MMAP 1224#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED) 1225 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize); 1226 munmap (cctx->sptr, cctx->ssize);
1133 else 1227 else
1134#endif 1228#endif
1135 Safefree (cctx->sptr); 1229 Safefree (cctx->sptr);
1230 }
1136 1231
1137 Safefree (cctx); 1232 Safefree (cctx);
1138} 1233}
1139 1234
1140/* wether this cctx should be destructed */ 1235/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1236#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1142 1237
1143static coro_cctx * 1238static coro_cctx *
1144cctx_get (pTHX) 1239cctx_get (pTHX)
1145{ 1240{
1146 while (expect_true (cctx_first)) 1241 while (expect_true (cctx_first))
… …
1153 return cctx; 1248 return cctx;
1154 1249
1155 cctx_destroy (cctx); 1250 cctx_destroy (cctx);
1156 } 1251 }
1157 1252
1158 return cctx_new (); 1253 return cctx_new_run ();
1159} 1254}
1160 1255
1161static void 1256static void
1162cctx_put (coro_cctx *cctx) 1257cctx_put (coro_cctx *cctx)
1163{ 1258{
1259 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1260
1164 /* free another cctx if overlimit */ 1261 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1262 if (expect_false (cctx_idle >= cctx_max_idle))
1166 { 1263 {
1167 coro_cctx *first = cctx_first; 1264 coro_cctx *first = cctx_first;
1168 cctx_first = first->next; 1265 cctx_first = first->next;
1169 --cctx_idle; 1266 --cctx_idle;
1170 1267
… …
1182transfer_check (pTHX_ struct coro *prev, struct coro *next) 1279transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{ 1280{
1184 if (expect_true (prev != next)) 1281 if (expect_true (prev != next))
1185 { 1282 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1283 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"); 1284 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1188 1285
1189 if (expect_false (next->flags & CF_RUNNING)) 1286 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"); 1287 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1191 1288
1192 if (expect_false (next->flags & CF_DESTROYED)) 1289 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"); 1290 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1194 1291
1195#if !PERL_VERSION_ATLEAST (5,10,0) 1292#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1293 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"); 1294 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1198#endif 1295#endif
1199 } 1296 }
1200} 1297}
1201 1298
1202/* always use the TRANSFER macro */ 1299/* always use the TRANSFER macro */
1203static void NOINLINE 1300static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1301transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{ 1302{
1206 dSTACKLEVEL; 1303 dSTACKLEVEL;
1207 static volatile int has_throw;
1208 1304
1209 /* sometimes transfer is only called to set idle_sp */ 1305 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next)) 1306 if (expect_false (!next))
1211 { 1307 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1308 ((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 */ 1309 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 } 1310 }
1215 else if (expect_true (prev != next)) 1311 else if (expect_true (prev != next))
1216 { 1312 {
1217 coro_cctx *prev__cctx; 1313 coro_cctx *prev__cctx;
1218 1314
1219 if (expect_false (prev->flags & CF_NEW)) 1315 if (expect_false (prev->flags & CF_NEW))
1220 { 1316 {
1221 /* create a new empty context */ 1317 /* create a new empty/source context */
1222 Newz (0, prev->cctx, 1, coro_cctx); 1318 prev->cctx = cctx_new_empty ();
1223 prev->flags &= ~CF_NEW; 1319 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING; 1320 prev->flags |= CF_RUNNING;
1225 } 1321 }
1226 1322
1227 prev->flags &= ~CF_RUNNING; 1323 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING; 1324 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231 1325
1232 /* first get rid of the old state */ 1326 /* first get rid of the old state */
1233 save_perl (aTHX_ prev); 1327 save_perl (aTHX_ prev);
1234 1328
1235 if (expect_false (next->flags & CF_NEW)) 1329 if (expect_false (next->flags & CF_NEW))
… …
1242 else 1336 else
1243 load_perl (aTHX_ next); 1337 load_perl (aTHX_ next);
1244 1338
1245 prev__cctx = prev->cctx; 1339 prev__cctx = prev->cctx;
1246 1340
1247 /* possibly "free" the cctx */ 1341 /* possibly untie and reuse the cctx */
1248 if (expect_true ( 1342 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL 1343 prev__cctx->idle_sp == (void *)stacklevel
1250 && !(prev__cctx->flags & CC_TRACE) 1344 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx 1345 && !force_cctx
1252 )) 1346 ))
1253 { 1347 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1348 /* 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)); 1349 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1256 1350
1257 prev->cctx = 0; 1351 prev->cctx = 0;
1258 1352
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1353 /* 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 */ 1354 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1267 1361
1268 ++next->usecount; 1362 ++next->usecount;
1269 1363
1270 if (expect_true (!next->cctx)) 1364 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX); 1365 next->cctx = cctx_get (aTHX);
1272
1273 has_throw = !!next->throw;
1274 1366
1275 if (expect_false (prev__cctx != next->cctx)) 1367 if (expect_false (prev__cctx != next->cctx))
1276 { 1368 {
1277 prev__cctx->top_env = PL_top_env; 1369 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env; 1370 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1371 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 } 1372 }
1281 1373
1282 free_coro_mortal (aTHX); 1374 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 } 1375 }
1298} 1376}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304 1377
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1378#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) 1379#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307 1380
1308/** high level stuff ********************************************************/ 1381/** high level stuff ********************************************************/
… …
1310static int 1383static int
1311coro_state_destroy (pTHX_ struct coro *coro) 1384coro_state_destroy (pTHX_ struct coro *coro)
1312{ 1385{
1313 if (coro->flags & CF_DESTROYED) 1386 if (coro->flags & CF_DESTROYED)
1314 return 0; 1387 return 0;
1388
1389 if (coro->on_destroy)
1390 coro->on_destroy (aTHX_ coro);
1315 1391
1316 coro->flags |= CF_DESTROYED; 1392 coro->flags |= CF_DESTROYED;
1317 1393
1318 if (coro->flags & CF_READY) 1394 if (coro->flags & CF_READY)
1319 { 1395 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1396 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */ 1397 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready; 1398 --coro_nready;
1324 UNLOCK;
1325 } 1399 }
1326 else 1400 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1401 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328 1402
1329 if (coro->mainstack && coro->mainstack != main_mainstack) 1403 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 { 1404 {
1331 struct coro temp; 1405 struct coro temp;
1332 1406
1333 if (coro->flags & CF_RUNNING) 1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335 1408
1336 save_perl (aTHX_ &temp); 1409 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro); 1410 load_perl (aTHX_ coro);
1338 1411
1339 coro_destroy (aTHX_ coro); 1412 coro_destruct (aTHX_ coro);
1340 1413
1341 load_perl (aTHX_ &temp); 1414 load_perl (aTHX_ &temp);
1342 1415
1343 coro->slot = 0; 1416 coro->slot = 0;
1344 } 1417 }
… …
1390# define MGf_DUP 0 1463# define MGf_DUP 0
1391#endif 1464#endif
1392}; 1465};
1393 1466
1394static void 1467static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1468prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{ 1469{
1397 ta->prev = SvSTATE (prev_sv); 1470 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv); 1471 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta); 1472 TRANSFER_CHECK (*ta);
1400} 1473}
1401 1474
1402static void 1475static void
1403api_transfer (SV *prev_sv, SV *next_sv) 1476api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1404{ 1477{
1405 dTHX;
1406 struct transfer_args ta; 1478 struct coro_transfer_args ta;
1407 1479
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1480 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1); 1481 TRANSFER (ta, 1);
1410} 1482}
1411 1483
1412/** Coro ********************************************************************/ 1484/** Coro ********************************************************************/
1413 1485
1414static void 1486INLINE void
1415coro_enq (pTHX_ SV *coro_sv) 1487coro_enq (pTHX_ struct coro *coro)
1416{ 1488{
1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1489 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1418} 1490}
1419 1491
1420static SV * 1492INLINE SV *
1421coro_deq (pTHX) 1493coro_deq (pTHX)
1422{ 1494{
1423 int prio; 1495 int prio;
1424 1496
1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1428 1500
1429 return 0; 1501 return 0;
1430} 1502}
1431 1503
1432static int 1504static int
1433api_ready (SV *coro_sv) 1505api_ready (pTHX_ SV *coro_sv)
1434{ 1506{
1435 dTHX;
1436 struct coro *coro; 1507 struct coro *coro;
1437 SV *sv_hook; 1508 SV *sv_hook;
1438 void (*xs_hook)(void); 1509 void (*xs_hook)(void);
1439 1510
1440 if (SvROK (coro_sv)) 1511 if (SvROK (coro_sv))
… …
1445 if (coro->flags & CF_READY) 1516 if (coro->flags & CF_READY)
1446 return 0; 1517 return 0;
1447 1518
1448 coro->flags |= CF_READY; 1519 coro->flags |= CF_READY;
1449 1520
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook; 1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454 1523
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1524 coro_enq (aTHX_ coro);
1456 ++coro_nready; 1525 ++coro_nready;
1457 1526
1458 UNLOCK;
1459
1460 if (sv_hook) 1527 if (sv_hook)
1461 { 1528 {
1462 dSP; 1529 dSP;
1463 1530
1464 ENTER; 1531 ENTER;
… …
1478 1545
1479 return 1; 1546 return 1;
1480} 1547}
1481 1548
1482static int 1549static int
1483api_is_ready (SV *coro_sv) 1550api_is_ready (pTHX_ SV *coro_sv)
1484{ 1551{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1552 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487} 1553}
1488 1554
1489static void 1555INLINE void
1490prepare_schedule (pTHX_ struct transfer_args *ta) 1556prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1491{ 1557{
1492 SV *prev_sv, *next_sv; 1558 SV *prev_sv, *next_sv;
1493 1559
1494 for (;;) 1560 for (;;)
1495 { 1561 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX); 1562 next_sv = coro_deq (aTHX);
1498 1563
1499 /* nothing to schedule: call the idle handler */ 1564 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv)) 1565 if (expect_false (!next_sv))
1501 { 1566 {
1502 dSP; 1567 dSP;
1503 UNLOCK;
1504 1568
1505 ENTER; 1569 ENTER;
1506 SAVETMPS; 1570 SAVETMPS;
1507 1571
1508 PUSHMARK (SP); 1572 PUSHMARK (SP);
… …
1513 FREETMPS; 1577 FREETMPS;
1514 LEAVE; 1578 LEAVE;
1515 continue; 1579 continue;
1516 } 1580 }
1517 1581
1518 ta->next = SvSTATE (next_sv); 1582 ta->next = SvSTATE_hv (next_sv);
1519 1583
1520 /* cannot transfer to destroyed coros, skip and look for next */ 1584 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED)) 1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 { 1586 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv); 1587 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */ 1588 /* coro_nready has already been taken care of by destroy */
1526 continue; 1589 continue;
1527 } 1590 }
1528 1591
1529 --coro_nready; 1592 --coro_nready;
1530 UNLOCK;
1531 break; 1593 break;
1532 } 1594 }
1533 1595
1534 /* free this only after the transfer */ 1596 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current); 1597 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv); 1598 ta->prev = SvSTATE_hv (prev_sv);
1537 TRANSFER_CHECK (*ta); 1599 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY); 1600 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1539 ta->next->flags &= ~CF_READY; 1601 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv); 1602 SvRV_set (coro_current, next_sv);
1541 1603
1542 LOCK;
1543 free_coro_mortal (aTHX); 1604 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv; 1605 coro_mortal = prev_sv;
1545 UNLOCK;
1546} 1606}
1547 1607
1548static void 1608INLINE void
1549prepare_cede (pTHX_ struct transfer_args *ta) 1609prepare_cede (pTHX_ struct coro_transfer_args *ta)
1550{ 1610{
1551 api_ready (coro_current); 1611 api_ready (aTHX_ coro_current);
1552 prepare_schedule (aTHX_ ta); 1612 prepare_schedule (aTHX_ ta);
1553} 1613}
1554 1614
1615INLINE void
1616prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1617{
1618 SV *prev = SvRV (coro_current);
1619
1620 if (coro_nready)
1621 {
1622 prepare_schedule (aTHX_ ta);
1623 api_ready (aTHX_ prev);
1624 }
1625 else
1626 prepare_nop (aTHX_ ta);
1627}
1628
1629static void
1630api_schedule (pTHX)
1631{
1632 struct coro_transfer_args ta;
1633
1634 prepare_schedule (aTHX_ &ta);
1635 TRANSFER (ta, 1);
1636}
1637
1555static int 1638static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta) 1639api_cede (pTHX)
1557{ 1640{
1558 if (coro_nready) 1641 struct coro_transfer_args ta;
1559 { 1642
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta); 1643 prepare_cede (aTHX_ &ta);
1562 api_ready (prev); 1644
1645 if (expect_true (ta.prev != ta.next))
1646 {
1647 TRANSFER (ta, 1);
1563 return 1; 1648 return 1;
1564 } 1649 }
1565 else 1650 else
1566 return 0; 1651 return 0;
1567} 1652}
1568 1653
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 1654static int
1580api_cede (void) 1655api_cede_notself (pTHX)
1581{ 1656{
1582 dTHX; 1657 if (coro_nready)
1658 {
1583 struct transfer_args ta; 1659 struct coro_transfer_args ta;
1584 1660
1585 prepare_cede (aTHX_ &ta); 1661 prepare_cede_notself (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1); 1662 TRANSFER (ta, 1);
1590 return 1; 1663 return 1;
1591 } 1664 }
1592 else 1665 else
1593 return 0; 1666 return 0;
1594} 1667}
1595 1668
1596static int 1669static 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) 1670api_trace (pTHX_ SV *coro_sv, int flags)
1613{ 1671{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv); 1672 struct coro *coro = SvSTATE (coro_sv);
1616 1673
1617 if (flags & CC_TRACE) 1674 if (flags & CC_TRACE)
1618 { 1675 {
1619 if (!coro->cctx) 1676 if (!coro->cctx)
1620 coro->cctx = cctx_new (); 1677 coro->cctx = cctx_new_run ();
1621 else if (!(coro->cctx->flags & CC_TRACE)) 1678 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack"); 1679 croak ("cannot enable tracing on coroutine with custom stack,");
1623 1680
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 } 1682 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 { 1684 {
… …
1632 else 1689 else
1633 coro->slot->runops = RUNOPS_DEFAULT; 1690 coro->slot->runops = RUNOPS_DEFAULT;
1634 } 1691 }
1635} 1692}
1636 1693
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/*****************************************************************************/ 1694/*****************************************************************************/
1654/* PerlIO::cede */ 1695/* PerlIO::cede */
1655 1696
1656typedef struct 1697typedef struct
1657{ 1698{
… …
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime (); 1726 double now = nvtime ();
1686 1727
1687 if (now >= self->next) 1728 if (now >= self->next)
1688 { 1729 {
1689 api_cede (); 1730 api_cede (aTHX);
1690 self->next = now + self->every; 1731 self->next = now + self->every;
1691 } 1732 }
1692 1733
1693 return PerlIOBuf_flush (aTHX_ f); 1734 return PerlIOBuf_flush (aTHX_ f);
1694} 1735}
… …
1723 PerlIOBuf_get_ptr, 1764 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt, 1765 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt, 1766 PerlIOBuf_set_ptrcnt,
1726}; 1767};
1727 1768
1769/*****************************************************************************/
1770
1771static const CV *slf_cv; /* for quick consistency check */
1772
1773static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1774static SV *slf_arg0;
1775static SV *slf_arg1;
1776static SV *slf_arg2;
1777
1778/* this restores the stack in the case we patched the entersub, to */
1779/* recreate the stack frame as perl will on following calls */
1780/* since entersub cleared the stack */
1781static OP *
1782pp_restore (pTHX)
1783{
1784 dSP;
1785
1786 PUSHMARK (SP);
1787
1788 EXTEND (SP, 3);
1789 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1790 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1791 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1792 PUSHs ((SV *)CvGV (slf_cv));
1793
1794 RETURNOP (slf_restore.op_first);
1795}
1796
1797static void
1798slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1799{
1800 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1801}
1802
1803static void
1804slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1805{
1806 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1807
1808 frame->prepare = slf_prepare_set_stacklevel;
1809 frame->check = slf_check_nop;
1810 frame->data = (void *)SvIV (arg [0]);
1811}
1812
1813static void
1814slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1815{
1816 SV **arg = (SV **)slf_frame.data;
1817
1818 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1819
1820 /* if the destination has ->throw set, then copy it */
1821 /* into the current coro's throw slot, so it will be raised */
1822 /* after the schedule */
1823 if (expect_false (ta->next->throw))
1824 {
1825 struct coro *coro = SvSTATE_current;
1826 SvREFCNT_dec (coro->throw);
1827 coro->throw = ta->next->throw;
1828 ta->next->throw = 0;
1829 }
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 PUTBACK;
1903
1904 /* now call the init function, which needs to set up slf_frame */
1905 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1906 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1907
1908 /* pop args */
1909 SP = PL_stack_base + POPMARK;
1910
1911 PUTBACK;
1912 }
1913
1914 /* now that we have a slf_frame, interpret it! */
1915 /* we use a callback system not to make the code needlessly */
1916 /* complicated, but so we can run multiple perl coros from one cctx */
1917
1918 do
1919 {
1920 struct coro_transfer_args ta;
1921
1922 slf_frame.prepare (aTHX_ &ta);
1923 TRANSFER (ta, 0);
1924
1925 checkmark = PL_stack_sp - PL_stack_base;
1926 }
1927 while (slf_frame.check (aTHX_ &slf_frame));
1928
1929 {
1930 dSP;
1931 SV **bot = PL_stack_base + checkmark;
1932 int gimme = GIMME_V;
1933
1934 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1935
1936 /* make sure we put something on the stack in scalar context */
1937 if (gimme == G_SCALAR)
1938 {
1939 if (sp == bot)
1940 XPUSHs (&PL_sv_undef);
1941
1942 SP = bot + 1;
1943 }
1944
1945 PUTBACK;
1946 }
1947
1948 {
1949 struct coro *coro = SvSTATE_current;
1950
1951 if (expect_false (coro->throw))
1952 {
1953 SV *exception = sv_2mortal (coro->throw);
1954
1955 coro->throw = 0;
1956 sv_setsv (ERRSV, exception);
1957 croak (0);
1958 }
1959 }
1960
1961 return NORMAL;
1962}
1963
1964static void
1965api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
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 if (items > 3)
1974 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1975
1976 CvFLAGS (cv) |= CVf_SLF;
1977 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1978 slf_cv = cv;
1979
1980 /* we patch the op, and then re-run the whole call */
1981 /* we have to put the same argument on the stack for this to work */
1982 /* and this will be done by pp_restore */
1983 slf_restore.op_next = (OP *)&slf_restore;
1984 slf_restore.op_type = OP_CUSTOM;
1985 slf_restore.op_ppaddr = pp_restore;
1986 slf_restore.op_first = PL_op;
1987
1988 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1989 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1990 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1991
1992 PL_op->op_ppaddr = pp_slf;
1993
1994 PL_op = (OP *)&slf_restore;
1995}
1996
1997/*****************************************************************************/
1998
1999static void
2000coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2001{
2002 SV *count_sv = AvARRAY (av)[0];
2003 IV count = SvIVX (count_sv);
2004
2005 count += adjust;
2006 SvIVX (count_sv) = count;
2007
2008 /* now wake up as many waiters as are expected to lock */
2009 while (count > 0 && AvFILLp (av) > 0)
2010 {
2011 SV *cb;
2012
2013 /* swap first two elements so we can shift a waiter */
2014 AvARRAY (av)[0] = AvARRAY (av)[1];
2015 AvARRAY (av)[1] = count_sv;
2016 cb = av_shift (av);
2017
2018 if (SvOBJECT (cb))
2019 api_ready (aTHX_ cb);
2020 else
2021 croak ("callbacks not yet supported");
2022
2023 SvREFCNT_dec (cb);
2024
2025 --count;
2026 }
2027}
2028
2029static void
2030coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2031{
2032 /* call $sem->adjust (0) to possibly wake up some other waiters */
2033 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2034}
2035
2036static int
2037slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2038{
2039 AV *av = (AV *)frame->data;
2040 SV *count_sv = AvARRAY (av)[0];
2041
2042 if (SvIVX (count_sv) > 0)
2043 {
2044 SvSTATE_current->on_destroy = 0;
2045 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2046 return 0;
2047 }
2048 else
2049 {
2050 int i;
2051 /* if we were woken up but can't down, we look through the whole */
2052 /* waiters list and only add us if we aren't in there already */
2053 /* this avoids some degenerate memory usage cases */
2054
2055 for (i = 1; i <= AvFILLp (av); ++i)
2056 if (AvARRAY (av)[i] == SvRV (coro_current))
2057 return 1;
2058
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060 return 1;
2061 }
2062}
2063
2064static void
2065slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2066{
2067 AV *av = (AV *)SvRV (arg [0]);
2068
2069 if (SvIVX (AvARRAY (av)[0]) > 0)
2070 {
2071 frame->data = (void *)av;
2072 frame->prepare = prepare_nop;
2073 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2074 }
2075 else
2076 {
2077 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2078
2079 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2080 frame->prepare = prepare_schedule;
2081
2082 /* to avoid race conditions when a woken-up coro gets terminated */
2083 /* we arrange for a temporary on_destroy that calls adjust (0) */
2084 assert (!SvSTATE_current->on_destroy);//D
2085 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2086 }
2087
2088 frame->check = slf_check_semaphore_down;
2089
2090}
2091
2092/*****************************************************************************/
2093
2094#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2095
2096/* create a closure from XS, returns a code reference */
2097/* the arg can be accessed via GENSUB_ARG from the callback */
2098/* the callback must use dXSARGS/XSRETURN */
2099static SV *
2100gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2101{
2102 CV *cv = (CV *)NEWSV (0, 0);
2103
2104 sv_upgrade ((SV *)cv, SVt_PVCV);
2105
2106 CvANON_on (cv);
2107 CvISXSUB_on (cv);
2108 CvXSUB (cv) = xsub;
2109 GENSUB_ARG = arg;
2110
2111 return newRV_noinc ((SV *)cv);
2112}
2113
2114/*****************************************************************************/
1728 2115
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2116MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730 2117
1731PROTOTYPES: DISABLE 2118PROTOTYPES: DISABLE
1732 2119
1733BOOT: 2120BOOT:
1734{ 2121{
1735#ifdef USE_ITHREADS 2122#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex); 2123# if CORO_PTHREAD
2124 coro_thx = PERL_GET_CONTEXT;
2125# endif
1737#endif 2126#endif
1738 BOOT_PAGESIZE; 2127 BOOT_PAGESIZE;
1739 2128
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2129 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2130 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1759 main_top_env = PL_top_env; 2148 main_top_env = PL_top_env;
1760 2149
1761 while (main_top_env->je_prev) 2150 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev; 2151 main_top_env = main_top_env->je_prev;
1763 2152
2153 {
2154 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2155
2156 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2157 hv_store_ent (PL_custom_op_names, slf,
2158 newSVpv ("coro_slf", 0), 0);
2159
2160 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2161 hv_store_ent (PL_custom_op_descs, slf,
2162 newSVpv ("coro schedule like function", 0), 0);
2163 }
2164
1764 coroapi.ver = CORO_API_VERSION; 2165 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION; 2166 coroapi.rev = CORO_API_REVISION;
2167
1766 coroapi.transfer = api_transfer; 2168 coroapi.transfer = api_transfer;
2169
2170 coroapi.sv_state = SvSTATE_;
2171 coroapi.execute_slf = api_execute_slf;
2172 coroapi.prepare_nop = prepare_nop;
2173 coroapi.prepare_schedule = prepare_schedule;
2174 coroapi.prepare_cede = prepare_cede;
2175 coroapi.prepare_cede_notself = prepare_cede_notself;
1767 2176
1768 { 2177 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2178 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770 2179
1771 if (!svp) croak ("Time::HiRes is required"); 2180 if (!svp) croak ("Time::HiRes is required");
… …
1804 av_push (coro->args, newSVsv (ST (i))); 2213 av_push (coro->args, newSVsv (ST (i)));
1805} 2214}
1806 OUTPUT: 2215 OUTPUT:
1807 RETVAL 2216 RETVAL
1808 2217
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 2218void
1813_set_stacklevel (...) 2219_set_stacklevel (...)
1814 ALIAS: 2220 CODE:
1815 Coro::State::transfer = 1 2221 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 2222
1823 PUTBACK; 2223void
1824 switch (ix) 2224transfer (...)
1825 { 2225 PROTOTYPE: $$
1826 case 0: 2226 CODE:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2227 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 2228
1861bool 2229bool
1862_destroy (SV *coro_sv) 2230_destroy (SV *coro_sv)
1863 CODE: 2231 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2232 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1871 CODE: 2239 CODE:
1872 _exit (code); 2240 _exit (code);
1873 2241
1874int 2242int
1875cctx_stacksize (int new_stacksize = 0) 2243cctx_stacksize (int new_stacksize = 0)
2244 PROTOTYPE: ;$
1876 CODE: 2245 CODE:
1877 RETVAL = coro_stacksize; 2246 RETVAL = cctx_stacksize;
1878 if (new_stacksize) 2247 if (new_stacksize)
2248 {
1879 coro_stacksize = new_stacksize; 2249 cctx_stacksize = new_stacksize;
2250 ++cctx_gen;
2251 }
1880 OUTPUT: 2252 OUTPUT:
1881 RETVAL 2253 RETVAL
1882 2254
1883int 2255int
2256cctx_max_idle (int max_idle = 0)
2257 PROTOTYPE: ;$
2258 CODE:
2259 RETVAL = cctx_max_idle;
2260 if (max_idle > 1)
2261 cctx_max_idle = max_idle;
2262 OUTPUT:
2263 RETVAL
2264
2265int
1884cctx_count () 2266cctx_count ()
2267 PROTOTYPE:
1885 CODE: 2268 CODE:
1886 RETVAL = cctx_count; 2269 RETVAL = cctx_count;
1887 OUTPUT: 2270 OUTPUT:
1888 RETVAL 2271 RETVAL
1889 2272
1890int 2273int
1891cctx_idle () 2274cctx_idle ()
2275 PROTOTYPE:
1892 CODE: 2276 CODE:
1893 RETVAL = cctx_idle; 2277 RETVAL = cctx_idle;
1894 OUTPUT: 2278 OUTPUT:
1895 RETVAL 2279 RETVAL
1896 2280
1897void 2281void
1898list () 2282list ()
2283 PROTOTYPE:
1899 PPCODE: 2284 PPCODE:
1900{ 2285{
1901 struct coro *coro; 2286 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next) 2287 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv) 2288 if (coro->hv)
… …
1962 RETVAL = boolSV (coro->flags & ix); 2347 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT: 2348 OUTPUT:
1964 RETVAL 2349 RETVAL
1965 2350
1966void 2351void
2352throw (Coro::State self, SV *throw = &PL_sv_undef)
2353 PROTOTYPE: $;$
2354 CODE:
2355 SvREFCNT_dec (self->throw);
2356 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2357
2358void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2359api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2360 PROTOTYPE: $;$
2361 C_ARGS: aTHX_ coro, flags
1968 2362
1969SV * 2363SV *
1970has_cctx (Coro::State coro) 2364has_cctx (Coro::State coro)
1971 PROTOTYPE: $ 2365 PROTOTYPE: $
1972 CODE: 2366 CODE:
… …
1980 CODE: 2374 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2375 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT: 2376 OUTPUT:
1983 RETVAL 2377 RETVAL
1984 2378
1985IV 2379UV
1986rss (Coro::State coro) 2380rss (Coro::State coro)
1987 PROTOTYPE: $ 2381 PROTOTYPE: $
1988 ALIAS: 2382 ALIAS:
1989 usecount = 1 2383 usecount = 1
1990 CODE: 2384 CODE:
… …
1996 OUTPUT: 2390 OUTPUT:
1997 RETVAL 2391 RETVAL
1998 2392
1999void 2393void
2000force_cctx () 2394force_cctx ()
2395 PROTOTYPE:
2001 CODE: 2396 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0; 2397 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 2398
2012void 2399void
2013swap_defsv (Coro::State self) 2400swap_defsv (Coro::State self)
2014 PROTOTYPE: $ 2401 PROTOTYPE: $
2015 ALIAS: 2402 ALIAS:
2016 swap_defav = 1 2403 swap_defav = 1
2017 CODE: 2404 CODE:
2018 if (!self->slot) 2405 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state"); 2406 croak ("cannot swap state with coroutine that has no saved state,");
2020 else 2407 else
2021 { 2408 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2409 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2410 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024 2411
… …
2049 2436
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2437 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV (); 2438 coro_ready[i] = newAV ();
2052 2439
2053 { 2440 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE); 2441 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056 2442
2057 coroapi.schedule = api_schedule; 2443 coroapi.schedule = api_schedule;
2058 coroapi.cede = api_cede; 2444 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself; 2445 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready; 2446 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready; 2447 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready; 2448 coroapi.nready = coro_nready;
2063 coroapi.current = coro_current; 2449 coroapi.current = coro_current;
2064 2450
2065 GCoroAPI = &coroapi; 2451 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi); 2452 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv); 2453 SvREADONLY_on (sv);
2068 } 2454 }
2069} 2455}
2456
2457void
2458schedule (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2461
2462void
2463cede (...)
2464 CODE:
2465 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2466
2467void
2468cede_notself (...)
2469 CODE:
2470 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2070 2471
2071void 2472void
2072_set_current (SV *current) 2473_set_current (SV *current)
2073 PROTOTYPE: $ 2474 PROTOTYPE: $
2074 CODE: 2475 CODE:
2075 SvREFCNT_dec (SvRV (coro_current)); 2476 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2477 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2077 2478
2078void 2479void
2079_set_readyhook (SV *hook) 2480_set_readyhook (SV *hook)
2080 PROTOTYPE: $ 2481 PROTOTYPE: $
2081 CODE: 2482 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook); 2483 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2484 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086 2485
2087int 2486int
2088prio (Coro::State coro, int newprio = 0) 2487prio (Coro::State coro, int newprio = 0)
2488 PROTOTYPE: $;$
2089 ALIAS: 2489 ALIAS:
2090 nice = 1 2490 nice = 1
2091 CODE: 2491 CODE:
2092{ 2492{
2093 RETVAL = coro->prio; 2493 RETVAL = coro->prio;
… …
2108 2508
2109SV * 2509SV *
2110ready (SV *self) 2510ready (SV *self)
2111 PROTOTYPE: $ 2511 PROTOTYPE: $
2112 CODE: 2512 CODE:
2113 RETVAL = boolSV (api_ready (self)); 2513 RETVAL = boolSV (api_ready (aTHX_ self));
2114 OUTPUT: 2514 OUTPUT:
2115 RETVAL 2515 RETVAL
2116 2516
2117int 2517int
2118nready (...) 2518nready (...)
… …
2125# for async_pool speedup 2525# for async_pool speedup
2126void 2526void
2127_pool_1 (SV *cb) 2527_pool_1 (SV *cb)
2128 CODE: 2528 CODE:
2129{ 2529{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current); 2530 HV *hv = (HV *)SvRV (coro_current);
2531 struct coro *coro = SvSTATE_hv ((SV *)hv);
2132 AV *defav = GvAV (PL_defgv); 2532 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2533 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av; 2534 AV *invoke_av;
2135 int i, len; 2535 int i, len;
2136 2536
… …
2141 SvREFCNT_dec (old); 2541 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n"); 2542 croak ("\3async_pool terminate\2\n");
2143 } 2543 }
2144 2544
2145 SvREFCNT_dec (coro->saved_deffh); 2545 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2546 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2147 2547
2148 hv_store (hv, "desc", sizeof ("desc") - 1, 2548 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2549 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150 2550
2151 invoke_av = (AV *)SvRV (invoke); 2551 invoke_av = (AV *)SvRV (invoke);
… …
2155 2555
2156 if (len > 0) 2556 if (len > 0)
2157 { 2557 {
2158 av_fill (defav, len - 1); 2558 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i) 2559 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2560 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2161 } 2561 }
2162
2163 SvREFCNT_dec (invoke);
2164} 2562}
2165 2563
2166void 2564void
2167_pool_2 (SV *cb) 2565_pool_2 (SV *cb)
2168 CODE: 2566 CODE:
2169{ 2567{
2170 struct coro *coro = SvSTATE (coro_current); 2568 struct coro *coro = SvSTATE_current;
2171 2569
2172 sv_setsv (cb, &PL_sv_undef); 2570 sv_setsv (cb, &PL_sv_undef);
2173 2571
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2572 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0; 2573 coro->saved_deffh = 0;
2176 2574
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2575 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2576 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 { 2577 {
2180 SV *old = PL_diehook; 2578 SV *old = PL_diehook;
2181 PL_diehook = 0; 2579 PL_diehook = 0;
2182 SvREFCNT_dec (old); 2580 SvREFCNT_dec (old);
… …
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2586 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189 2587
2190 coro->prio = 0; 2588 coro->prio = 0;
2191 2589
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2590 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0); 2591 api_trace (aTHX_ coro_current, 0);
2194 2592
2195 av_push (av_async_pool, newSVsv (coro_current)); 2593 av_push (av_async_pool, newSVsv (coro_current));
2196} 2594}
2197 2595
2198#if 0 2596
2597MODULE = Coro::State PACKAGE = Coro::AIO
2199 2598
2200void 2599void
2201_generator_call (...) 2600_get_state (SV *self)
2202 PROTOTYPE: @ 2601 PROTOTYPE: $
2203 PPCODE: 2602 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{ 2603{
2213 struct coro *coro; 2604 AV *defav = GvAV (PL_defgv);
2214 MAGIC *mg; 2605 AV *av = newAV ();
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i; 2606 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)); 2607 SV *data_sv = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL); 2608 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2257 SvCUR_set (RETVAL, sizeof (struct io_state)); 2609 SvCUR_set (data_sv, sizeof (struct io_state));
2258 SvPOK_only (RETVAL); 2610 SvPOK_only (data_sv);
2259 2611
2260 data->errorno = errno; 2612 data->errorno = errno;
2261 data->laststype = PL_laststype; 2613 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval; 2614 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache; 2615 data->statcache = PL_statcache;
2616
2617 av_extend (av, AvFILLp (defav) + 1 + 1);
2618
2619 for (i = 0; i <= AvFILLp (defav); ++i)
2620 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2621
2622 av_push (av, data_sv);
2623
2624 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2625
2626 api_ready (aTHX_ self);
2264} 2627}
2265 OUTPUT:
2266 RETVAL
2267 2628
2268void 2629void
2269_set_state (char *data_) 2630_set_state (SV *state)
2270 PROTOTYPE: $ 2631 PROTOTYPE: $
2271 CODE: 2632 PPCODE:
2272{ 2633{
2273 struct io_state *data = (void *)data_; 2634 AV *av = (AV *)SvRV (state);
2635 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2636 int i;
2274 2637
2275 errno = data->errorno; 2638 errno = data->errorno;
2276 PL_laststype = data->laststype; 2639 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval; 2640 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache; 2641 PL_statcache = data->statcache;
2642
2643 EXTEND (SP, AvFILLp (av));
2644 for (i = 0; i < AvFILLp (av); ++i)
2645 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2279} 2646}
2280 2647
2281 2648
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent 2649MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283 2650
2284BOOT: 2651BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2652 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286 2653
2287SV * 2654void
2288_schedule (...) 2655_schedule (...)
2289 PROTOTYPE: @
2290 CODE: 2656 CODE:
2291{ 2657{
2292 static int incede; 2658 static int incede;
2293 2659
2294 api_cede_notself (); 2660 api_cede_notself (aTHX);
2295 2661
2296 ++incede; 2662 ++incede;
2297 while (coro_nready >= incede && api_cede ()) 2663 while (coro_nready >= incede && api_cede (aTHX))
2298 ; 2664 ;
2299 2665
2300 sv_setsv (sv_activity, &PL_sv_undef); 2666 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede) 2667 if (coro_nready >= incede)
2302 { 2668 {
… …
2312 2678
2313MODULE = Coro::State PACKAGE = PerlIO::cede 2679MODULE = Coro::State PACKAGE = PerlIO::cede
2314 2680
2315BOOT: 2681BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2682 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2683
2684MODULE = Coro::State PACKAGE = Coro::Semaphore
2685
2686SV *
2687new (SV *klass, SV *count_ = 0)
2688 CODE:
2689{
2690 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2691 AV *av = newAV ();
2692 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2693 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2694}
2695 OUTPUT:
2696 RETVAL
2697
2698SV *
2699count (SV *self)
2700 CODE:
2701 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2702 OUTPUT:
2703 RETVAL
2704
2705void
2706up (SV *self, int adjust = 1)
2707 ALIAS:
2708 adjust = 1
2709 CODE:
2710 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2711
2712void
2713down (SV *self)
2714 CODE:
2715 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2716
2717void
2718try (SV *self)
2719 PPCODE:
2720{
2721 AV *av = (AV *)SvRV (self);
2722 SV *count_sv = AvARRAY (av)[0];
2723 IV count = SvIVX (count_sv);
2724
2725 if (count > 0)
2726 {
2727 --count;
2728 SvIVX (count_sv) = count;
2729 XSRETURN_YES;
2730 }
2731 else
2732 XSRETURN_NO;
2733}
2734
2735void
2736waiters (SV *self)
2737 CODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740
2741 if (GIMME_V == G_SCALAR)
2742 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2743 else
2744 {
2745 int i;
2746 EXTEND (SP, AvFILLp (av) + 1 - 1);
2747 for (i = 1; i <= AvFILLp (av); ++i)
2748 PUSHs (newSVsv (AvARRAY (av)[i]));
2749 }
2750}
2751

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