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Comparing Coro/Coro/State.xs (file contents):
Revision 1.250 by root, Wed Oct 22 16:34:07 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#ifndef SvREFCNT_inc_NN
94# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
95#endif
96
97/* 5.11 */
98#ifndef CxHASARGS
99# define CxHASARGS(cx) (cx)->blk_sub.hasargs
100#endif
101 100
102/* 5.8.7 */ 101/* 5.8.7 */
103#ifndef SvRV_set 102#ifndef SvRV_set
104# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
105#endif 104#endif
… …
117# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
118#endif 117#endif
119 118
120/* 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
121 * portable way as possible. */ 120 * portable way as possible. */
122#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
123#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
124 126
125#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
126 128
127#if __GNUC__ >= 3 129#if __GNUC__ >= 3
128# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
129# define BARRIER __asm__ __volatile__ ("" : : : "memory")
130# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
131#else 133#else
132# define attribute(x) 134# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
135#endif 137#endif
136 138
137#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
138#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
139 141
140#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
141 143
142#include "CoroAPI.h" 144#include "CoroAPI.h"
143 145
144#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
145static perl_mutex coro_mutex; 147# if CORO_PTHREAD
146# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
147# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# endif
148#else
149# define LOCK (void)0
150# define UNLOCK (void)0
151#endif 150#endif
152 151
153/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
154struct io_state 153struct io_state
155{ 154{
156 AV *res; 155 AV *res;
157 int errorno; 156 int errorno;
158 I32 laststype; 157 I32 laststype; /* U16 in 5.10.0 */
159 int laststatval; 158 int laststatval;
160 Stat_t statcache; 159 Stat_t statcache;
161}; 160};
162 161
163static double (*nvtime)(); /* so why doesn't it take void? */ 162static double (*nvtime)(); /* so why doesn't it take void? */
164 163
164static U32 cctx_gen;
165static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env; 168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171 171
172static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook; 174static SV *rv_diehook;
175static SV *rv_warnhook; 175static SV *rv_warnhook;
… …
194 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196}; 196};
197 197
198/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
199typedef struct coro_cctx { 199typedef struct coro_cctx
200{
200 struct coro_cctx *next; 201 struct coro_cctx *next;
201 202
202 /* the stack */ 203 /* the stack */
203 void *sptr; 204 void *sptr;
204 size_t ssize; 205 size_t ssize;
… …
207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208 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 */
209 JMPENV *top_env; 210 JMPENV *top_env;
210 coro_context cctx; 211 coro_context cctx;
211 212
213 U32 gen;
212#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
213 int valgrind_id; 215 int valgrind_id;
214#endif 216#endif
215 unsigned char flags; 217 unsigned char flags;
216} coro_cctx; 218} coro_cctx;
… …
221 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
222 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
223}; 225};
224 226
225/* 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 */
226typedef struct { 228typedef struct
229{
227 SV *defsv; 230 SV *defsv;
228 AV *defav; 231 AV *defav;
229 SV *errsv; 232 SV *errsv;
230 SV *irsgv; 233 SV *irsgv;
231#define VAR(name,type) type name; 234#define VAR(name,type) type name;
… …
235 238
236#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))
237 240
238/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
239struct coro { 242struct coro {
240 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
241 coro_cctx *cctx; 244 coro_cctx *cctx;
242 245
243 /* process data */ 246 /* process data */
247 struct CoroSLF slf_frame; /* saved slf frame */
244 AV *mainstack; 248 AV *mainstack;
245 perl_slots *slot; /* basically the saved sp */ 249 perl_slots *slot; /* basically the saved sp */
246 250
247 AV *args; /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
248 int refcnt; /* coroutines are refcounted, yes */ 252 int refcnt; /* coroutines are refcounted, yes */
249 int flags; /* CF_ flags */ 253 int flags; /* CF_ flags */
250 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);
251 256
252 /* statistics */ 257 /* statistics */
253 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
254 259
255 /* coro process data */ 260 /* coro process data */
… …
263 struct coro *next, *prev; 268 struct coro *next, *prev;
264}; 269};
265 270
266typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
267typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274static struct CoroSLF slf_frame; /* the current slf frame */
268 275
269/** Coro ********************************************************************/ 276/** Coro ********************************************************************/
270 277
271#define PRIO_MAX 3 278#define PRIO_MAX 3
272#define PRIO_HIGH 1 279#define PRIO_HIGH 1
… …
276#define PRIO_MIN -4 283#define PRIO_MIN -4
277 284
278/* for Coro.pm */ 285/* for Coro.pm */
279static SV *coro_current; 286static SV *coro_current;
280static SV *coro_readyhook; 287static SV *coro_readyhook;
281static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 288static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
282static int coro_nready;
283static struct coro *coro_first; 289static struct coro *coro_first;
290#define coro_nready coroapi.nready
284 291
285/** lowlevel stuff **********************************************************/ 292/** lowlevel stuff **********************************************************/
286 293
287static SV * 294static SV *
288coro_get_sv (pTHX_ const char *name, int create) 295coro_get_sv (pTHX_ const char *name, int create)
… …
381static MGVTBL coro_cv_vtbl = { 388static MGVTBL coro_cv_vtbl = {
382 0, 0, 0, 0, 389 0, 0, 0, 0,
383 coro_cv_free 390 coro_cv_free
384}; 391};
385 392
386#define CORO_MAGIC(sv,type) \ 393#define CORO_MAGIC(sv, type) \
387 SvMAGIC (sv) \ 394 expect_true (SvMAGIC (sv)) \
388 ? SvMAGIC (sv)->mg_type == type \ 395 ? expect_true (SvMAGIC (sv)->mg_type == type) \
389 ? SvMAGIC (sv) \ 396 ? SvMAGIC (sv) \
390 : mg_find (sv, type) \ 397 : mg_find (sv, type) \
391 : 0 398 : 0
392 399
393#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)
394#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)
395 402
396static struct coro * 403INLINE struct coro *
397SvSTATE_ (pTHX_ SV *coro) 404SvSTATE_ (pTHX_ SV *coro)
398{ 405{
399 HV *stash; 406 HV *stash;
400 MAGIC *mg; 407 MAGIC *mg;
401 408
… …
416 mg = CORO_MAGIC_state (coro); 423 mg = CORO_MAGIC_state (coro);
417 return (struct coro *)mg->mg_ptr; 424 return (struct coro *)mg->mg_ptr;
418} 425}
419 426
420#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))
421 441
422/* the next two functions merely cache the padlists */ 442/* the next two functions merely cache the padlists */
423static void 443static void
424get_padlist (pTHX_ CV *cv) 444get_padlist (pTHX_ CV *cv)
425{ 445{
… …
492 CvPADLIST (cv) = (AV *)POPs; 512 CvPADLIST (cv) = (AV *)POPs;
493 } 513 }
494 514
495 PUTBACK; 515 PUTBACK;
496 } 516 }
517
518 slf_frame = c->slf_frame;
497} 519}
498 520
499static void 521static void
500save_perl (pTHX_ Coro__State c) 522save_perl (pTHX_ Coro__State c)
501{ 523{
524 c->slf_frame = slf_frame;
525
502 { 526 {
503 dSP; 527 dSP;
504 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
505 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
506 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
573 #undef VAR 597 #undef VAR
574 } 598 }
575} 599}
576 600
577/* 601/*
578 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
579 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
580 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
581 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
582 */ 606 */
583#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
… …
626 650
627/* 651/*
628 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
629 */ 653 */
630static void 654static void
631coro_destroy_stacks (pTHX) 655coro_destruct_stacks (pTHX)
632{ 656{
633 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
634 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
635 659
636 while (PL_curstackinfo) 660 while (PL_curstackinfo)
… …
785 809
786 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
787} 811}
788 812
789static 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
790coro_setup (pTHX_ struct coro *coro) 827coro_setup (pTHX_ struct coro *coro)
791{ 828{
792 /* 829 /*
793 * emulate part of the perl startup here. 830 * emulate part of the perl startup here.
794 */ 831 */
… …
818 PL_rs = newSVsv (GvSV (irsgv)); 855 PL_rs = newSVsv (GvSV (irsgv));
819 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv); 856 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
820 857
821 { 858 {
822 dSP; 859 dSP;
823 LOGOP myop; 860 UNOP myop;
824 861
825 Zero (&myop, 1, LOGOP); 862 Zero (&myop, 1, UNOP);
826 myop.op_next = Nullop; 863 myop.op_next = Nullop;
827 myop.op_flags = OPf_WANT_VOID; 864 myop.op_flags = OPf_WANT_VOID;
828 865
829 PUSHMARK (SP); 866 PUSHMARK (SP);
830 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 867 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
833 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 870 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
834 SPAGAIN; 871 SPAGAIN;
835 } 872 }
836 873
837 /* 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
838 * 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.
839 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
840 * so we ENTER here for symmetry
841 */ 876 */
842 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 */
843} 879}
844 880
845static void 881static void
846coro_destroy (pTHX_ struct coro *coro) 882coro_destruct (pTHX_ struct coro *coro)
847{ 883{
848 if (!IN_DESTRUCT) 884 if (!IN_DESTRUCT)
849 { 885 {
850 /* restore all saved variables and stuff */ 886 /* restore all saved variables and stuff */
851 LEAVE_SCOPE (0); 887 LEAVE_SCOPE (0);
… …
873 SvREFCNT_dec (PL_warnhook); 909 SvREFCNT_dec (PL_warnhook);
874 910
875 SvREFCNT_dec (coro->saved_deffh); 911 SvREFCNT_dec (coro->saved_deffh);
876 SvREFCNT_dec (coro->throw); 912 SvREFCNT_dec (coro->throw);
877 913
878 coro_destroy_stacks (aTHX); 914 coro_destruct_stacks (aTHX);
879} 915}
880 916
881static void 917INLINE void
882free_coro_mortal (pTHX) 918free_coro_mortal (pTHX)
883{ 919{
884 if (expect_true (coro_mortal)) 920 if (expect_true (coro_mortal))
885 { 921 {
886 SvREFCNT_dec (coro_mortal); 922 SvREFCNT_dec (coro_mortal);
… …
891static int 927static int
892runops_trace (pTHX) 928runops_trace (pTHX)
893{ 929{
894 COP *oldcop = 0; 930 COP *oldcop = 0;
895 int oldcxix = -2; 931 int oldcxix = -2;
896 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 */
897 coro_cctx *cctx = coro->cctx; 933 coro_cctx *cctx = coro->cctx;
898 934
899 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 935 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
900 { 936 {
901 PERL_ASYNC_CHECK (); 937 PERL_ASYNC_CHECK ();
… …
1010 1046
1011 TAINT_NOT; 1047 TAINT_NOT;
1012 return 0; 1048 return 0;
1013} 1049}
1014 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
1015/* 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 */
1016/* _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 */
1017/* during execution of a perl program */ 1060/* during execution of a perl program */
1061/* also initialises PL_top_env */
1018static void NOINLINE 1062static void NOINLINE
1019cctx_prepare (pTHX_ coro_cctx *cctx) 1063cctx_prepare (pTHX_ coro_cctx *cctx)
1020{ 1064{
1021 dSP; 1065 dSP;
1022 LOGOP myop; 1066 UNOP myop;
1023 1067
1024 PL_top_env = &PL_start_env; 1068 PL_top_env = &PL_start_env;
1025 1069
1026 if (cctx->flags & CC_TRACE) 1070 if (cctx->flags & CC_TRACE)
1027 PL_runops = runops_trace; 1071 PL_runops = runops_trace;
1028 1072
1029 Zero (&myop, 1, LOGOP); 1073 Zero (&myop, 1, UNOP);
1030 myop.op_next = PL_op; 1074 myop.op_next = PL_op;
1031 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1075 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1032 1076
1033 PUSHMARK (SP); 1077 PUSHMARK (SP);
1034 EXTEND (SP, 2); 1078 EXTEND (SP, 2);
1035 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1079 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1036 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1080 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1037 PUTBACK; 1081 PUTBACK;
1038 PL_op = (OP *)&myop; 1082 PL_op = (OP *)&myop;
1039 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1083 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1040 SPAGAIN; 1084 SPAGAIN;
1041} 1085}
1042 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
1043/* 1094/*
1044 * this is a _very_ stripped down perl interpreter ;) 1095 * this is a _very_ stripped down perl interpreter ;)
1045 */ 1096 */
1046static void 1097static void
1047cctx_run (void *arg) 1098cctx_run (void *arg)
1048{ 1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1049 dTHX; 1106 dTHX;
1050 1107
1051 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1108 /* normally we would need to skip the entersub here */
1052 UNLOCK; 1109 /* not doing so will re-execute it, which is exactly what we want */
1053
1054 /* we now skip the entersub that lead to transfer() */
1055 PL_op = PL_op->op_next; 1110 /* PL_nop = PL_nop->op_next */
1056 1111
1057 /* inject a fake subroutine call to cctx_init */ 1112 /* inject a fake subroutine call to cctx_init */
1058 cctx_prepare (aTHX_ (coro_cctx *)arg); 1113 cctx_prepare (aTHX_ (coro_cctx *)arg);
1059 1114
1115 /* cctx_run is the alternative tail of transfer() */
1116 transfer_tail (aTHX);
1117
1060 /* 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 */
1061 PL_restartop = PL_op; 1119 PL_restartop = PL_op;
1062 perl_run (PL_curinterp); 1120 perl_run (PL_curinterp);
1063 1121
1064 /* 1122 /*
1065 * 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
1066 * 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)
1067 * 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
1068 * bootstrap-time "top" top_env, as we cannot restore the "main" 1126 * bootstrap-time "top" top_env, as we cannot restore the "main"
1069 * coroutine as Coro has no such concept 1127 * coroutine as Coro has no such concept
1070 */ 1128 */
1071 PL_top_env = main_top_env; 1129 PL_top_env = main_top_env;
1072 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 }
1073} 1132}
1074 1133
1075static coro_cctx * 1134static coro_cctx *
1076cctx_new () 1135cctx_new ()
1077{ 1136{
1078 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 ();
1079 void *stack_start; 1166 void *stack_start;
1080 size_t stack_size; 1167 size_t stack_size;
1081 1168
1082 ++cctx_count;
1083
1084 Newz (0, cctx, 1, coro_cctx);
1085
1086#if HAVE_MMAP 1169#if HAVE_MMAP
1087 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;
1088 /* mmap supposedly does allocate-on-write for us */ 1171 /* mmap supposedly does allocate-on-write for us */
1089 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);
1090 1173
1091 if (cctx->sptr != (void *)-1) 1174 if (cctx->sptr != (void *)-1)
1092 { 1175 {
1093# if CORO_STACKGUARD 1176 #if CORO_STACKGUARD
1094 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1177 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1095# endif 1178 #endif
1096 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1179 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1097 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1180 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1098 cctx->flags |= CC_MAPPED; 1181 cctx->flags |= CC_MAPPED;
1099 } 1182 }
1100 else 1183 else
1101#endif 1184#endif
1102 { 1185 {
1103 cctx->ssize = coro_stacksize * (long)sizeof (long); 1186 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1104 New (0, cctx->sptr, coro_stacksize, long); 1187 New (0, cctx->sptr, cctx_stacksize, long);
1105 1188
1106 if (!cctx->sptr) 1189 if (!cctx->sptr)
1107 { 1190 {
1108 perror ("FATAL: unable to allocate stack for coroutine"); 1191 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1109 _exit (EXIT_FAILURE); 1192 _exit (EXIT_FAILURE);
1110 } 1193 }
1111 1194
1112 stack_start = cctx->sptr; 1195 stack_start = cctx->sptr;
1113 stack_size = cctx->ssize; 1196 stack_size = cctx->ssize;
1114 } 1197 }
1115 1198
1116 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
1117 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);
1118 1204
1119 return cctx; 1205 return cctx;
1120} 1206}
1121 1207
… …
1124{ 1210{
1125 if (!cctx) 1211 if (!cctx)
1126 return; 1212 return;
1127 1213
1128 --cctx_count; 1214 --cctx_count;
1215 coro_destroy (&cctx->cctx);
1129 1216
1217 /* coro_transfer creates new, empty cctx's */
1218 if (cctx->sptr)
1219 {
1130#if CORO_USE_VALGRIND 1220 #if CORO_USE_VALGRIND
1131 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1221 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1132#endif 1222 #endif
1133 1223
1134#if HAVE_MMAP 1224#if HAVE_MMAP
1135 if (cctx->flags & CC_MAPPED) 1225 if (cctx->flags & CC_MAPPED)
1136 munmap (cctx->sptr, cctx->ssize); 1226 munmap (cctx->sptr, cctx->ssize);
1137 else 1227 else
1138#endif 1228#endif
1139 Safefree (cctx->sptr); 1229 Safefree (cctx->sptr);
1230 }
1140 1231
1141 Safefree (cctx); 1232 Safefree (cctx);
1142} 1233}
1143 1234
1144/* wether this cctx should be destructed */ 1235/* wether this cctx should be destructed */
1145#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))
1146 1237
1147static coro_cctx * 1238static coro_cctx *
1148cctx_get (pTHX) 1239cctx_get (pTHX)
1149{ 1240{
1150 while (expect_true (cctx_first)) 1241 while (expect_true (cctx_first))
… …
1157 return cctx; 1248 return cctx;
1158 1249
1159 cctx_destroy (cctx); 1250 cctx_destroy (cctx);
1160 } 1251 }
1161 1252
1162 return cctx_new (); 1253 return cctx_new_run ();
1163} 1254}
1164 1255
1165static void 1256static void
1166cctx_put (coro_cctx *cctx) 1257cctx_put (coro_cctx *cctx)
1167{ 1258{
1259 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1260
1168 /* free another cctx if overlimit */ 1261 /* free another cctx if overlimit */
1169 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1262 if (expect_false (cctx_idle >= cctx_max_idle))
1170 { 1263 {
1171 coro_cctx *first = cctx_first; 1264 coro_cctx *first = cctx_first;
1172 cctx_first = first->next; 1265 cctx_first = first->next;
1173 --cctx_idle; 1266 --cctx_idle;
1174 1267
… …
1186transfer_check (pTHX_ struct coro *prev, struct coro *next) 1279transfer_check (pTHX_ struct coro *prev, struct coro *next)
1187{ 1280{
1188 if (expect_true (prev != next)) 1281 if (expect_true (prev != next))
1189 { 1282 {
1190 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1283 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1191 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,");
1192 1285
1193 if (expect_false (next->flags & CF_RUNNING)) 1286 if (expect_false (next->flags & CF_RUNNING))
1194 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,");
1195 1288
1196 if (expect_false (next->flags & CF_DESTROYED)) 1289 if (expect_false (next->flags & CF_DESTROYED))
1197 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,");
1198 1291
1199#if !PERL_VERSION_ATLEAST (5,10,0) 1292#if !PERL_VERSION_ATLEAST (5,10,0)
1200 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1293 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1201 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,");
1202#endif 1295#endif
1203 } 1296 }
1204} 1297}
1205 1298
1206/* always use the TRANSFER macro */ 1299/* always use the TRANSFER macro */
1207static void NOINLINE 1300static void NOINLINE
1208transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1301transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1209{ 1302{
1210 dSTACKLEVEL; 1303 dSTACKLEVEL;
1211 static volatile int has_throw;
1212 1304
1213 /* sometimes transfer is only called to set idle_sp */ 1305 /* sometimes transfer is only called to set idle_sp */
1214 if (expect_false (!next)) 1306 if (expect_false (!next))
1215 { 1307 {
1216 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1308 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1217 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 */
1218 } 1310 }
1219 else if (expect_true (prev != next)) 1311 else if (expect_true (prev != next))
1220 { 1312 {
1221 coro_cctx *prev__cctx; 1313 coro_cctx *prev__cctx;
1222 1314
1223 if (expect_false (prev->flags & CF_NEW)) 1315 if (expect_false (prev->flags & CF_NEW))
1224 { 1316 {
1225 /* create a new empty context */ 1317 /* create a new empty/source context */
1226 Newz (0, prev->cctx, 1, coro_cctx); 1318 prev->cctx = cctx_new_empty ();
1227 prev->flags &= ~CF_NEW; 1319 prev->flags &= ~CF_NEW;
1228 prev->flags |= CF_RUNNING; 1320 prev->flags |= CF_RUNNING;
1229 } 1321 }
1230 1322
1231 prev->flags &= ~CF_RUNNING; 1323 prev->flags &= ~CF_RUNNING;
1232 next->flags |= CF_RUNNING; 1324 next->flags |= CF_RUNNING;
1233
1234 LOCK;
1235 1325
1236 /* first get rid of the old state */ 1326 /* first get rid of the old state */
1237 save_perl (aTHX_ prev); 1327 save_perl (aTHX_ prev);
1238 1328
1239 if (expect_false (next->flags & CF_NEW)) 1329 if (expect_false (next->flags & CF_NEW))
… …
1246 else 1336 else
1247 load_perl (aTHX_ next); 1337 load_perl (aTHX_ next);
1248 1338
1249 prev__cctx = prev->cctx; 1339 prev__cctx = prev->cctx;
1250 1340
1251 /* possibly "free" the cctx */ 1341 /* possibly untie and reuse the cctx */
1252 if (expect_true ( 1342 if (expect_true (
1253 prev__cctx->idle_sp == STACKLEVEL 1343 prev__cctx->idle_sp == (void *)stacklevel
1254 && !(prev__cctx->flags & CC_TRACE) 1344 && !(prev__cctx->flags & CC_TRACE)
1255 && !force_cctx 1345 && !force_cctx
1256 )) 1346 ))
1257 { 1347 {
1258 /* 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 */
1259 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));
1260 1350
1261 prev->cctx = 0; 1351 prev->cctx = 0;
1262 1352
1263 /* 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 */
1264 /* 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 */
… …
1271 1361
1272 ++next->usecount; 1362 ++next->usecount;
1273 1363
1274 if (expect_true (!next->cctx)) 1364 if (expect_true (!next->cctx))
1275 next->cctx = cctx_get (aTHX); 1365 next->cctx = cctx_get (aTHX);
1276
1277 has_throw = !!next->throw;
1278 1366
1279 if (expect_false (prev__cctx != next->cctx)) 1367 if (expect_false (prev__cctx != next->cctx))
1280 { 1368 {
1281 prev__cctx->top_env = PL_top_env; 1369 prev__cctx->top_env = PL_top_env;
1282 PL_top_env = next->cctx->top_env; 1370 PL_top_env = next->cctx->top_env;
1283 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1371 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1284 } 1372 }
1285 1373
1286 free_coro_mortal (aTHX); 1374 transfer_tail (aTHX);
1287 UNLOCK;
1288
1289 if (expect_false (has_throw))
1290 {
1291 struct coro *coro = SvSTATE (coro_current);
1292
1293 if (coro->throw)
1294 {
1295 SV *exception = coro->throw;
1296 coro->throw = 0;
1297 sv_setsv (ERRSV, exception);
1298 croak (0);
1299 }
1300 }
1301 } 1375 }
1302} 1376}
1303
1304struct transfer_args
1305{
1306 struct coro *prev, *next;
1307};
1308 1377
1309#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))
1310#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1379#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1311 1380
1312/** high level stuff ********************************************************/ 1381/** high level stuff ********************************************************/
… …
1314static int 1383static int
1315coro_state_destroy (pTHX_ struct coro *coro) 1384coro_state_destroy (pTHX_ struct coro *coro)
1316{ 1385{
1317 if (coro->flags & CF_DESTROYED) 1386 if (coro->flags & CF_DESTROYED)
1318 return 0; 1387 return 0;
1388
1389 if (coro->on_destroy)
1390 coro->on_destroy (aTHX_ coro);
1319 1391
1320 coro->flags |= CF_DESTROYED; 1392 coro->flags |= CF_DESTROYED;
1321 1393
1322 if (coro->flags & CF_READY) 1394 if (coro->flags & CF_READY)
1323 { 1395 {
1324 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1396 /* reduce nready, as destroying a ready coro effectively unreadies it */
1325 /* alternative: look through all ready queues and remove the coro */ 1397 /* alternative: look through all ready queues and remove the coro */
1326 LOCK;
1327 --coro_nready; 1398 --coro_nready;
1328 UNLOCK;
1329 } 1399 }
1330 else 1400 else
1331 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 */
1332 1402
1333 if (coro->mainstack && coro->mainstack != main_mainstack) 1403 if (coro->mainstack && coro->mainstack != main_mainstack)
1334 { 1404 {
1335 struct coro temp; 1405 struct coro temp;
1336 1406
1337 if (coro->flags & CF_RUNNING) 1407 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1338 croak ("FATAL: tried to destroy currently running coroutine");
1339 1408
1340 save_perl (aTHX_ &temp); 1409 save_perl (aTHX_ &temp);
1341 load_perl (aTHX_ coro); 1410 load_perl (aTHX_ coro);
1342 1411
1343 coro_destroy (aTHX_ coro); 1412 coro_destruct (aTHX_ coro);
1344 1413
1345 load_perl (aTHX_ &temp); 1414 load_perl (aTHX_ &temp);
1346 1415
1347 coro->slot = 0; 1416 coro->slot = 0;
1348 } 1417 }
… …
1394# define MGf_DUP 0 1463# define MGf_DUP 0
1395#endif 1464#endif
1396}; 1465};
1397 1466
1398static void 1467static void
1399prepare_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)
1400{ 1469{
1401 ta->prev = SvSTATE (prev_sv); 1470 ta->prev = SvSTATE (prev_sv);
1402 ta->next = SvSTATE (next_sv); 1471 ta->next = SvSTATE (next_sv);
1403 TRANSFER_CHECK (*ta); 1472 TRANSFER_CHECK (*ta);
1404} 1473}
1405 1474
1406static void 1475static void
1407api_transfer (SV *prev_sv, SV *next_sv) 1476api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1408{ 1477{
1409 dTHX;
1410 struct transfer_args ta; 1478 struct coro_transfer_args ta;
1411 1479
1412 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1480 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1413 TRANSFER (ta, 1); 1481 TRANSFER (ta, 1);
1414} 1482}
1415 1483
1416/** Coro ********************************************************************/ 1484/** Coro ********************************************************************/
1417 1485
1418static void 1486INLINE void
1419coro_enq (pTHX_ SV *coro_sv) 1487coro_enq (pTHX_ struct coro *coro)
1420{ 1488{
1421 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));
1422} 1490}
1423 1491
1424static SV * 1492INLINE SV *
1425coro_deq (pTHX) 1493coro_deq (pTHX)
1426{ 1494{
1427 int prio; 1495 int prio;
1428 1496
1429 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1497 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1432 1500
1433 return 0; 1501 return 0;
1434} 1502}
1435 1503
1436static int 1504static int
1437api_ready (SV *coro_sv) 1505api_ready (pTHX_ SV *coro_sv)
1438{ 1506{
1439 dTHX;
1440 struct coro *coro; 1507 struct coro *coro;
1441 SV *sv_hook; 1508 SV *sv_hook;
1442 void (*xs_hook)(void); 1509 void (*xs_hook)(void);
1443 1510
1444 if (SvROK (coro_sv)) 1511 if (SvROK (coro_sv))
… …
1449 if (coro->flags & CF_READY) 1516 if (coro->flags & CF_READY)
1450 return 0; 1517 return 0;
1451 1518
1452 coro->flags |= CF_READY; 1519 coro->flags |= CF_READY;
1453 1520
1454 LOCK;
1455
1456 sv_hook = coro_nready ? 0 : coro_readyhook; 1521 sv_hook = coro_nready ? 0 : coro_readyhook;
1457 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1522 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1458 1523
1459 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv)); 1524 coro_enq (aTHX_ coro);
1460 ++coro_nready; 1525 ++coro_nready;
1461 1526
1462 UNLOCK;
1463
1464 if (sv_hook) 1527 if (sv_hook)
1465 { 1528 {
1466 dSP; 1529 dSP;
1467 1530
1468 ENTER; 1531 ENTER;
… …
1482 1545
1483 return 1; 1546 return 1;
1484} 1547}
1485 1548
1486static int 1549static int
1487api_is_ready (SV *coro_sv) 1550api_is_ready (pTHX_ SV *coro_sv)
1488{ 1551{
1489 dTHX;
1490 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1552 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1491} 1553}
1492 1554
1493static void 1555INLINE void
1494prepare_schedule (pTHX_ struct transfer_args *ta) 1556prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1495{ 1557{
1496 SV *prev_sv, *next_sv; 1558 SV *prev_sv, *next_sv;
1497 1559
1498 for (;;) 1560 for (;;)
1499 { 1561 {
1500 LOCK;
1501 next_sv = coro_deq (aTHX); 1562 next_sv = coro_deq (aTHX);
1502 1563
1503 /* nothing to schedule: call the idle handler */ 1564 /* nothing to schedule: call the idle handler */
1504 if (expect_false (!next_sv)) 1565 if (expect_false (!next_sv))
1505 { 1566 {
1506 dSP; 1567 dSP;
1507 UNLOCK;
1508 1568
1509 ENTER; 1569 ENTER;
1510 SAVETMPS; 1570 SAVETMPS;
1511 1571
1512 PUSHMARK (SP); 1572 PUSHMARK (SP);
… …
1517 FREETMPS; 1577 FREETMPS;
1518 LEAVE; 1578 LEAVE;
1519 continue; 1579 continue;
1520 } 1580 }
1521 1581
1522 ta->next = SvSTATE (next_sv); 1582 ta->next = SvSTATE_hv (next_sv);
1523 1583
1524 /* cannot transfer to destroyed coros, skip and look for next */ 1584 /* cannot transfer to destroyed coros, skip and look for next */
1525 if (expect_false (ta->next->flags & CF_DESTROYED)) 1585 if (expect_false (ta->next->flags & CF_DESTROYED))
1526 { 1586 {
1527 UNLOCK;
1528 SvREFCNT_dec (next_sv); 1587 SvREFCNT_dec (next_sv);
1529 /* coro_nready is already taken care of by destroy */ 1588 /* coro_nready has already been taken care of by destroy */
1530 continue; 1589 continue;
1531 } 1590 }
1532 1591
1533 --coro_nready; 1592 --coro_nready;
1534 UNLOCK;
1535 break; 1593 break;
1536 } 1594 }
1537 1595
1538 /* free this only after the transfer */ 1596 /* free this only after the transfer */
1539 prev_sv = SvRV (coro_current); 1597 prev_sv = SvRV (coro_current);
1540 ta->prev = SvSTATE (prev_sv); 1598 ta->prev = SvSTATE_hv (prev_sv);
1541 TRANSFER_CHECK (*ta); 1599 TRANSFER_CHECK (*ta);
1542 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));
1543 ta->next->flags &= ~CF_READY; 1601 ta->next->flags &= ~CF_READY;
1544 SvRV_set (coro_current, next_sv); 1602 SvRV_set (coro_current, next_sv);
1545 1603
1546 LOCK;
1547 free_coro_mortal (aTHX); 1604 free_coro_mortal (aTHX);
1548 coro_mortal = prev_sv; 1605 coro_mortal = prev_sv;
1549 UNLOCK;
1550} 1606}
1551 1607
1552static void 1608INLINE void
1553prepare_cede (pTHX_ struct transfer_args *ta) 1609prepare_cede (pTHX_ struct coro_transfer_args *ta)
1554{ 1610{
1555 api_ready (coro_current); 1611 api_ready (aTHX_ coro_current);
1556 prepare_schedule (aTHX_ ta); 1612 prepare_schedule (aTHX_ ta);
1557} 1613}
1558 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
1559static int 1638static int
1560prepare_cede_notself (pTHX_ struct transfer_args *ta) 1639api_cede (pTHX)
1561{ 1640{
1562 if (coro_nready) 1641 struct coro_transfer_args ta;
1563 { 1642
1564 SV *prev = SvRV (coro_current);
1565 prepare_schedule (aTHX_ ta); 1643 prepare_cede (aTHX_ &ta);
1566 api_ready (prev); 1644
1645 if (expect_true (ta.prev != ta.next))
1646 {
1647 TRANSFER (ta, 1);
1567 return 1; 1648 return 1;
1568 } 1649 }
1569 else 1650 else
1570 return 0; 1651 return 0;
1571} 1652}
1572 1653
1573static void
1574api_schedule (void)
1575{
1576 dTHX;
1577 struct transfer_args ta;
1578
1579 prepare_schedule (aTHX_ &ta);
1580 TRANSFER (ta, 1);
1581}
1582
1583static int 1654static int
1584api_cede (void) 1655api_cede_notself (pTHX)
1585{ 1656{
1586 dTHX; 1657 if (coro_nready)
1658 {
1587 struct transfer_args ta; 1659 struct coro_transfer_args ta;
1588 1660
1589 prepare_cede (aTHX_ &ta); 1661 prepare_cede_notself (aTHX_ &ta);
1590
1591 if (expect_true (ta.prev != ta.next))
1592 {
1593 TRANSFER (ta, 1); 1662 TRANSFER (ta, 1);
1594 return 1; 1663 return 1;
1595 } 1664 }
1596 else 1665 else
1597 return 0; 1666 return 0;
1598} 1667}
1599 1668
1600static int 1669static void
1601api_cede_notself (void)
1602{
1603 dTHX;
1604 struct transfer_args ta;
1605
1606 if (prepare_cede_notself (aTHX_ &ta))
1607 {
1608 TRANSFER (ta, 1);
1609 return 1;
1610 }
1611 else
1612 return 0;
1613}
1614
1615static void
1616api_trace (SV *coro_sv, int flags) 1670api_trace (pTHX_ SV *coro_sv, int flags)
1617{ 1671{
1618 dTHX;
1619 struct coro *coro = SvSTATE (coro_sv); 1672 struct coro *coro = SvSTATE (coro_sv);
1620 1673
1621 if (flags & CC_TRACE) 1674 if (flags & CC_TRACE)
1622 { 1675 {
1623 if (!coro->cctx) 1676 if (!coro->cctx)
1624 coro->cctx = cctx_new (); 1677 coro->cctx = cctx_new_run ();
1625 else if (!(coro->cctx->flags & CC_TRACE)) 1678 else if (!(coro->cctx->flags & CC_TRACE))
1626 croak ("cannot enable tracing on coroutine with custom stack"); 1679 croak ("cannot enable tracing on coroutine with custom stack,");
1627 1680
1628 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1681 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1629 } 1682 }
1630 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1683 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1631 { 1684 {
… …
1636 else 1689 else
1637 coro->slot->runops = RUNOPS_DEFAULT; 1690 coro->slot->runops = RUNOPS_DEFAULT;
1638 } 1691 }
1639} 1692}
1640 1693
1641static int
1642coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1643{
1644 AV *padlist;
1645 AV *av = (AV *)mg->mg_obj;
1646
1647 abort ();
1648
1649 return 0;
1650}
1651
1652static MGVTBL coro_gensub_vtbl = {
1653 0, 0, 0, 0,
1654 coro_gensub_free
1655};
1656
1657/*****************************************************************************/ 1694/*****************************************************************************/
1658/* PerlIO::cede */ 1695/* PerlIO::cede */
1659 1696
1660typedef struct 1697typedef struct
1661{ 1698{
… …
1688 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1725 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1689 double now = nvtime (); 1726 double now = nvtime ();
1690 1727
1691 if (now >= self->next) 1728 if (now >= self->next)
1692 { 1729 {
1693 api_cede (); 1730 api_cede (aTHX);
1694 self->next = now + self->every; 1731 self->next = now + self->every;
1695 } 1732 }
1696 1733
1697 return PerlIOBuf_flush (aTHX_ f); 1734 return PerlIOBuf_flush (aTHX_ f);
1698} 1735}
… …
1727 PerlIOBuf_get_ptr, 1764 PerlIOBuf_get_ptr,
1728 PerlIOBuf_get_cnt, 1765 PerlIOBuf_get_cnt,
1729 PerlIOBuf_set_ptrcnt, 1766 PerlIOBuf_set_ptrcnt,
1730}; 1767};
1731 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/*****************************************************************************/
1732 2115
1733MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2116MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1734 2117
1735PROTOTYPES: DISABLE 2118PROTOTYPES: DISABLE
1736 2119
1737BOOT: 2120BOOT:
1738{ 2121{
1739#ifdef USE_ITHREADS 2122#ifdef USE_ITHREADS
1740 MUTEX_INIT (&coro_mutex); 2123# if CORO_PTHREAD
2124 coro_thx = PERL_GET_CONTEXT;
2125# endif
1741#endif 2126#endif
1742 BOOT_PAGESIZE; 2127 BOOT_PAGESIZE;
1743 2128
1744 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2129 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1745 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2130 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1763 main_top_env = PL_top_env; 2148 main_top_env = PL_top_env;
1764 2149
1765 while (main_top_env->je_prev) 2150 while (main_top_env->je_prev)
1766 main_top_env = main_top_env->je_prev; 2151 main_top_env = main_top_env->je_prev;
1767 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
1768 coroapi.ver = CORO_API_VERSION; 2165 coroapi.ver = CORO_API_VERSION;
1769 coroapi.rev = CORO_API_REVISION; 2166 coroapi.rev = CORO_API_REVISION;
2167
1770 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;
1771 2176
1772 { 2177 {
1773 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2178 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1774 2179
1775 if (!svp) croak ("Time::HiRes is required"); 2180 if (!svp) croak ("Time::HiRes is required");
… …
1808 av_push (coro->args, newSVsv (ST (i))); 2213 av_push (coro->args, newSVsv (ST (i)));
1809} 2214}
1810 OUTPUT: 2215 OUTPUT:
1811 RETVAL 2216 RETVAL
1812 2217
1813# these not obviously related functions are all rolled into the same xs
1814# function to increase chances that they all will call transfer with the same
1815# stack offset
1816void 2218void
1817_set_stacklevel (...) 2219_set_stacklevel (...)
1818 ALIAS: 2220 CODE:
1819 Coro::State::transfer = 1 2221 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
1820 Coro::schedule = 2
1821 Coro::cede = 3
1822 Coro::cede_notself = 4
1823 CODE:
1824{
1825 struct transfer_args ta;
1826 2222
1827 PUTBACK; 2223void
1828 switch (ix) 2224transfer (...)
1829 { 2225 PROTOTYPE: $$
1830 case 0: 2226 CODE:
1831 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2227 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
1832 ta.next = 0;
1833 break;
1834
1835 case 1:
1836 if (items != 2)
1837 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1838
1839 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1840 break;
1841
1842 case 2:
1843 prepare_schedule (aTHX_ &ta);
1844 break;
1845
1846 case 3:
1847 prepare_cede (aTHX_ &ta);
1848 break;
1849
1850 case 4:
1851 if (!prepare_cede_notself (aTHX_ &ta))
1852 XSRETURN_EMPTY;
1853
1854 break;
1855 }
1856 SPAGAIN;
1857
1858 BARRIER;
1859 PUTBACK;
1860 TRANSFER (ta, 0);
1861 SPAGAIN; /* might be the sp of a different coroutine now */
1862 /* be extra careful not to ever do anything after TRANSFER */
1863}
1864 2228
1865bool 2229bool
1866_destroy (SV *coro_sv) 2230_destroy (SV *coro_sv)
1867 CODE: 2231 CODE:
1868 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2232 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1875 CODE: 2239 CODE:
1876 _exit (code); 2240 _exit (code);
1877 2241
1878int 2242int
1879cctx_stacksize (int new_stacksize = 0) 2243cctx_stacksize (int new_stacksize = 0)
2244 PROTOTYPE: ;$
1880 CODE: 2245 CODE:
1881 RETVAL = coro_stacksize; 2246 RETVAL = cctx_stacksize;
1882 if (new_stacksize) 2247 if (new_stacksize)
2248 {
1883 coro_stacksize = new_stacksize; 2249 cctx_stacksize = new_stacksize;
2250 ++cctx_gen;
2251 }
1884 OUTPUT: 2252 OUTPUT:
1885 RETVAL 2253 RETVAL
1886 2254
1887int 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
1888cctx_count () 2266cctx_count ()
2267 PROTOTYPE:
1889 CODE: 2268 CODE:
1890 RETVAL = cctx_count; 2269 RETVAL = cctx_count;
1891 OUTPUT: 2270 OUTPUT:
1892 RETVAL 2271 RETVAL
1893 2272
1894int 2273int
1895cctx_idle () 2274cctx_idle ()
2275 PROTOTYPE:
1896 CODE: 2276 CODE:
1897 RETVAL = cctx_idle; 2277 RETVAL = cctx_idle;
1898 OUTPUT: 2278 OUTPUT:
1899 RETVAL 2279 RETVAL
1900 2280
1901void 2281void
1902list () 2282list ()
2283 PROTOTYPE:
1903 PPCODE: 2284 PPCODE:
1904{ 2285{
1905 struct coro *coro; 2286 struct coro *coro;
1906 for (coro = coro_first; coro; coro = coro->next) 2287 for (coro = coro_first; coro; coro = coro->next)
1907 if (coro->hv) 2288 if (coro->hv)
… …
1966 RETVAL = boolSV (coro->flags & ix); 2347 RETVAL = boolSV (coro->flags & ix);
1967 OUTPUT: 2348 OUTPUT:
1968 RETVAL 2349 RETVAL
1969 2350
1970void 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
1971api_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
1972 2362
1973SV * 2363SV *
1974has_cctx (Coro::State coro) 2364has_cctx (Coro::State coro)
1975 PROTOTYPE: $ 2365 PROTOTYPE: $
1976 CODE: 2366 CODE:
… …
1984 CODE: 2374 CODE:
1985 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2375 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1986 OUTPUT: 2376 OUTPUT:
1987 RETVAL 2377 RETVAL
1988 2378
1989IV 2379UV
1990rss (Coro::State coro) 2380rss (Coro::State coro)
1991 PROTOTYPE: $ 2381 PROTOTYPE: $
1992 ALIAS: 2382 ALIAS:
1993 usecount = 1 2383 usecount = 1
1994 CODE: 2384 CODE:
… …
2000 OUTPUT: 2390 OUTPUT:
2001 RETVAL 2391 RETVAL
2002 2392
2003void 2393void
2004force_cctx () 2394force_cctx ()
2395 PROTOTYPE:
2005 CODE: 2396 CODE:
2006 struct coro *coro = SvSTATE (coro_current);
2007 coro->cctx->idle_sp = 0; 2397 SvSTATE_current->cctx->idle_sp = 0;
2008
2009void
2010throw (Coro::State self, SV *throw = &PL_sv_undef)
2011 PROTOTYPE: $;$
2012 CODE:
2013 SvREFCNT_dec (self->throw);
2014 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2015 2398
2016void 2399void
2017swap_defsv (Coro::State self) 2400swap_defsv (Coro::State self)
2018 PROTOTYPE: $ 2401 PROTOTYPE: $
2019 ALIAS: 2402 ALIAS:
2020 swap_defav = 1 2403 swap_defav = 1
2021 CODE: 2404 CODE:
2022 if (!self->slot) 2405 if (!self->slot)
2023 croak ("cannot swap state with coroutine that has no saved state"); 2406 croak ("cannot swap state with coroutine that has no saved state,");
2024 else 2407 else
2025 { 2408 {
2026 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2409 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2027 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2410 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2028 2411
… …
2053 2436
2054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2437 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2055 coro_ready[i] = newAV (); 2438 coro_ready[i] = newAV ();
2056 2439
2057 { 2440 {
2058 SV *sv = perl_get_sv ("Coro::API", TRUE); 2441 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2059 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2060 2442
2061 coroapi.schedule = api_schedule; 2443 coroapi.schedule = api_schedule;
2062 coroapi.cede = api_cede; 2444 coroapi.cede = api_cede;
2063 coroapi.cede_notself = api_cede_notself; 2445 coroapi.cede_notself = api_cede_notself;
2064 coroapi.ready = api_ready; 2446 coroapi.ready = api_ready;
2065 coroapi.is_ready = api_is_ready; 2447 coroapi.is_ready = api_is_ready;
2066 coroapi.nready = &coro_nready; 2448 coroapi.nready = coro_nready;
2067 coroapi.current = coro_current; 2449 coroapi.current = coro_current;
2068 2450
2069 GCoroAPI = &coroapi; 2451 GCoroAPI = &coroapi;
2070 sv_setiv (sv, (IV)&coroapi); 2452 sv_setiv (sv, (IV)&coroapi);
2071 SvREADONLY_on (sv); 2453 SvREADONLY_on (sv);
2072 } 2454 }
2073} 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);
2074 2471
2075void 2472void
2076_set_current (SV *current) 2473_set_current (SV *current)
2077 PROTOTYPE: $ 2474 PROTOTYPE: $
2078 CODE: 2475 CODE:
… …
2081 2478
2082void 2479void
2083_set_readyhook (SV *hook) 2480_set_readyhook (SV *hook)
2084 PROTOTYPE: $ 2481 PROTOTYPE: $
2085 CODE: 2482 CODE:
2086 LOCK;
2087 SvREFCNT_dec (coro_readyhook); 2483 SvREFCNT_dec (coro_readyhook);
2088 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2484 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2089 UNLOCK;
2090 2485
2091int 2486int
2092prio (Coro::State coro, int newprio = 0) 2487prio (Coro::State coro, int newprio = 0)
2488 PROTOTYPE: $;$
2093 ALIAS: 2489 ALIAS:
2094 nice = 1 2490 nice = 1
2095 CODE: 2491 CODE:
2096{ 2492{
2097 RETVAL = coro->prio; 2493 RETVAL = coro->prio;
… …
2112 2508
2113SV * 2509SV *
2114ready (SV *self) 2510ready (SV *self)
2115 PROTOTYPE: $ 2511 PROTOTYPE: $
2116 CODE: 2512 CODE:
2117 RETVAL = boolSV (api_ready (self)); 2513 RETVAL = boolSV (api_ready (aTHX_ self));
2118 OUTPUT: 2514 OUTPUT:
2119 RETVAL 2515 RETVAL
2120 2516
2121int 2517int
2122nready (...) 2518nready (...)
… …
2129# for async_pool speedup 2525# for async_pool speedup
2130void 2526void
2131_pool_1 (SV *cb) 2527_pool_1 (SV *cb)
2132 CODE: 2528 CODE:
2133{ 2529{
2134 struct coro *coro = SvSTATE (coro_current);
2135 HV *hv = (HV *)SvRV (coro_current); 2530 HV *hv = (HV *)SvRV (coro_current);
2531 struct coro *coro = SvSTATE_hv ((SV *)hv);
2136 AV *defav = GvAV (PL_defgv); 2532 AV *defav = GvAV (PL_defgv);
2137 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2533 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2138 AV *invoke_av; 2534 AV *invoke_av;
2139 int i, len; 2535 int i, len;
2140 2536
… …
2161 { 2557 {
2162 av_fill (defav, len - 1); 2558 av_fill (defav, len - 1);
2163 for (i = 0; i < len; ++i) 2559 for (i = 0; i < len; ++i)
2164 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1])); 2560 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2165 } 2561 }
2166
2167 SvREFCNT_dec (invoke);
2168} 2562}
2169 2563
2170void 2564void
2171_pool_2 (SV *cb) 2565_pool_2 (SV *cb)
2172 CODE: 2566 CODE:
2173{ 2567{
2174 struct coro *coro = SvSTATE (coro_current); 2568 struct coro *coro = SvSTATE_current;
2175 2569
2176 sv_setsv (cb, &PL_sv_undef); 2570 sv_setsv (cb, &PL_sv_undef);
2177 2571
2178 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2572 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2179 coro->saved_deffh = 0; 2573 coro->saved_deffh = 0;
2180 2574
2181 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2575 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2182 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2576 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2183 { 2577 {
2184 SV *old = PL_diehook; 2578 SV *old = PL_diehook;
2185 PL_diehook = 0; 2579 PL_diehook = 0;
2186 SvREFCNT_dec (old); 2580 SvREFCNT_dec (old);
… …
2192 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2586 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2193 2587
2194 coro->prio = 0; 2588 coro->prio = 0;
2195 2589
2196 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2590 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2197 api_trace (coro_current, 0); 2591 api_trace (aTHX_ coro_current, 0);
2198 2592
2199 av_push (av_async_pool, newSVsv (coro_current)); 2593 av_push (av_async_pool, newSVsv (coro_current));
2200} 2594}
2201
2202#if 0
2203
2204void
2205_generator_call (...)
2206 PROTOTYPE: @
2207 PPCODE:
2208 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2209 xxxx
2210 abort ();
2211
2212SV *
2213gensub (SV *sub, ...)
2214 PROTOTYPE: &;@
2215 CODE:
2216{
2217 struct coro *coro;
2218 MAGIC *mg;
2219 CV *xcv;
2220 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2221 int i;
2222
2223 CvGV (ncv) = CvGV (cv);
2224 CvFILE (ncv) = CvFILE (cv);
2225
2226 Newz (0, coro, 1, struct coro);
2227 coro->args = newAV ();
2228 coro->flags = CF_NEW;
2229
2230 av_extend (coro->args, items - 1);
2231 for (i = 1; i < items; i++)
2232 av_push (coro->args, newSVsv (ST (i)));
2233
2234 CvISXSUB_on (ncv);
2235 CvXSUBANY (ncv).any_ptr = (void *)coro;
2236
2237 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2238
2239 CvXSUB (ncv) = CvXSUB (xcv);
2240 CvANON_on (ncv);
2241
2242 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2243 RETVAL = newRV_noinc ((SV *)ncv);
2244}
2245 OUTPUT:
2246 RETVAL
2247
2248#endif
2249 2595
2250 2596
2251MODULE = Coro::State PACKAGE = Coro::AIO 2597MODULE = Coro::State PACKAGE = Coro::AIO
2252 2598
2253void 2599void
2254_get_state (SV *self) 2600_get_state (SV *self)
2601 PROTOTYPE: $
2255 PPCODE: 2602 PPCODE:
2256{ 2603{
2257 AV *defav = GvAV (PL_defgv); 2604 AV *defav = GvAV (PL_defgv);
2258 AV *av = newAV (); 2605 AV *av = newAV ();
2259 int i; 2606 int i;
… …
2274 2621
2275 av_push (av, data_sv); 2622 av_push (av, data_sv);
2276 2623
2277 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av))); 2624 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2278 2625
2279 api_ready (self); 2626 api_ready (aTHX_ self);
2280} 2627}
2281 2628
2282void 2629void
2283_set_state (SV *state) 2630_set_state (SV *state)
2284 PROTOTYPE: $ 2631 PROTOTYPE: $
… …
2302MODULE = Coro::State PACKAGE = Coro::AnyEvent 2649MODULE = Coro::State PACKAGE = Coro::AnyEvent
2303 2650
2304BOOT: 2651BOOT:
2305 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2652 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2306 2653
2307SV * 2654void
2308_schedule (...) 2655_schedule (...)
2309 PROTOTYPE: @
2310 CODE: 2656 CODE:
2311{ 2657{
2312 static int incede; 2658 static int incede;
2313 2659
2314 api_cede_notself (); 2660 api_cede_notself (aTHX);
2315 2661
2316 ++incede; 2662 ++incede;
2317 while (coro_nready >= incede && api_cede ()) 2663 while (coro_nready >= incede && api_cede (aTHX))
2318 ; 2664 ;
2319 2665
2320 sv_setsv (sv_activity, &PL_sv_undef); 2666 sv_setsv (sv_activity, &PL_sv_undef);
2321 if (coro_nready >= incede) 2667 if (coro_nready >= incede)
2322 { 2668 {
… …
2332 2678
2333MODULE = Coro::State PACKAGE = PerlIO::cede 2679MODULE = Coro::State PACKAGE = PerlIO::cede
2334 2680
2335BOOT: 2681BOOT:
2336 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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