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Comparing Coro/Coro/State.xs (file contents):
Revision 1.247 by root, Wed Sep 24 21:31:29 2008 UTC vs.
Revision 1.280 by root, Sun Nov 16 09:43:18 2008 UTC

… …
46# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
47#endif 47#endif
48 48
49#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif 51#endif
55 52
56/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
58 55
59#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
81# ifndef IS_PADCONST 78# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
83# endif 80# endif
84#endif 81#endif
85 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
86/* 5.8.8 */ 93/* 5.8.8 */
87#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
89#endif 96#endif
90#ifndef newSV 97#ifndef newSV
91# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
92#endif 99#endif
93 100
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */ 101/* 5.8.7 */
100#ifndef SvRV_set 102#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v) 103# define SvRV_set(s,v) SvRV(s) = (v)
102#endif 104#endif
103 105
… …
114# define CORO_PREFER_PERL_FUNCTIONS 0 116# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif 117#endif
116 118
117/* The next macros try to return the current stack pointer, in an as 119/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */ 120 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel 121#if __GNUC__ >= 4
120#define STACKLEVEL ((void *)&stacklevel) 122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
121 126
122#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
123 128
124#if __GNUC__ >= 3 129#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value)) 131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
128#else 133#else
129# define attribute(x) 134# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr) 135# define expect(expr,value) (expr)
136# define INLINE static
132#endif 137#endif
133 138
134#define expect_false(expr) expect ((expr) != 0, 0) 139#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1) 140#define expect_true(expr) expect ((expr) != 0, 1)
136 141
137#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
138 143
139#include "CoroAPI.h" 144#include "CoroAPI.h"
140 145
141#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
142static perl_mutex coro_mutex; 147# if CORO_PTHREAD
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148static void *coro_thx;
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# endif
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif 150#endif
149 151
150/* helper storage struct for Coro::AIO */ 152/* helper storage struct for Coro::AIO */
151struct io_state 153struct io_state
152{ 154{
155 AV *res;
153 int errorno; 156 int errorno;
154 I32 laststype; 157 I32 laststype; /* U16 in 5.10.0 */
155 int laststatval; 158 int laststatval;
156 Stat_t statcache; 159 Stat_t statcache;
157}; 160};
158 161
159static double (*nvtime)(); /* so why doesn't it take void? */ 162static double (*nvtime)(); /* so why doesn't it take void? */
160 163
164static U32 cctx_gen;
161static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
162static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
163static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env; 168static JMPENV *main_top_env;
165static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
166static volatile SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
167 172
168static GV *irsgv; /* $/ */ 173static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */ 174static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook; 175static SV *rv_diehook;
171static SV *rv_warnhook; 176static SV *rv_warnhook;
… …
190 CC_TRACE_LINE = 0x10, /* trace each statement */ 195 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192}; 197};
193 198
194/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
195typedef struct coro_cctx { 200typedef struct coro_cctx
201{
196 struct coro_cctx *next; 202 struct coro_cctx *next;
197 203
198 /* the stack */ 204 /* the stack */
199 void *sptr; 205 void *sptr;
200 size_t ssize; 206 size_t ssize;
… …
203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
205 JMPENV *top_env; 211 JMPENV *top_env;
206 coro_context cctx; 212 coro_context cctx;
207 213
214 U32 gen;
208#if CORO_USE_VALGRIND 215#if CORO_USE_VALGRIND
209 int valgrind_id; 216 int valgrind_id;
210#endif 217#endif
211 unsigned char flags; 218 unsigned char flags;
212} coro_cctx; 219} coro_cctx;
… …
217 CF_NEW = 0x0004, /* has never been switched to */ 224 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
219}; 226};
220 227
221/* the structure where most of the perl state is stored, overlaid on the cxstack */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct { 229typedef struct
230{
223 SV *defsv; 231 SV *defsv;
224 AV *defav; 232 AV *defav;
225 SV *errsv; 233 SV *errsv;
226 SV *irsgv; 234 SV *irsgv;
227#define VAR(name,type) type name; 235#define VAR(name,type) type name;
… …
231 239
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
233 241
234/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
235struct coro { 243struct coro {
236 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the C coroutine allocated to this perl coroutine, if any */
237 coro_cctx *cctx; 245 coro_cctx *cctx;
238 246
239 /* process data */ 247 /* process data */
248 struct CoroSLF slf_frame; /* saved slf frame */
240 AV *mainstack; 249 AV *mainstack;
241 perl_slots *slot; /* basically the saved sp */ 250 perl_slots *slot; /* basically the saved sp */
242 251
243 AV *args; /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
244 int refcnt; /* coroutines are refcounted, yes */ 253 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */ 254 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */ 255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
247 257
248 /* statistics */ 258 /* statistics */
249 int usecount; /* number of transfers to this coro */ 259 int usecount; /* number of transfers to this coro */
250 260
251 /* coro process data */ 261 /* coro process data */
… …
259 struct coro *next, *prev; 269 struct coro *next, *prev;
260}; 270};
261 271
262typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
263typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275static struct CoroSLF slf_frame; /* the current slf frame */
264 276
265/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
266 278
267#define PRIO_MAX 3 279#define PRIO_MAX 3
268#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
272#define PRIO_MIN -4 284#define PRIO_MIN -4
273 285
274/* for Coro.pm */ 286/* for Coro.pm */
275static SV *coro_current; 287static SV *coro_current;
276static SV *coro_readyhook; 288static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
278static int coro_nready;
279static struct coro *coro_first; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
280 292
281/** lowlevel stuff **********************************************************/ 293/** lowlevel stuff **********************************************************/
282 294
283static SV * 295static SV *
284coro_get_sv (pTHX_ const char *name, int create) 296coro_get_sv (pTHX_ const char *name, int create)
… …
324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
325#endif 337#endif
326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
327 --AvFILLp (padlist); 339 --AvFILLp (padlist);
328 340
329 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
330 av_store (newpadlist, 1, (SV *)newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
331 343
332 return newpadlist; 344 return newpadlist;
333} 345}
334 346
… …
377static MGVTBL coro_cv_vtbl = { 389static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0, 390 0, 0, 0, 0,
379 coro_cv_free 391 coro_cv_free
380}; 392};
381 393
382#define CORO_MAGIC(sv,type) \ 394#define CORO_MAGIC(sv, type) \
383 SvMAGIC (sv) \ 395 SvMAGIC (sv) \
384 ? SvMAGIC (sv)->mg_type == type \ 396 ? SvMAGIC (sv)->mg_type == type \
385 ? SvMAGIC (sv) \ 397 ? SvMAGIC (sv) \
386 : mg_find (sv, type) \ 398 : mg_find (sv, type) \
387 : 0 399 : 0
388 400
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391 403
392static struct coro * 404INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro) 405SvSTATE_ (pTHX_ SV *coro)
394{ 406{
395 HV *stash; 407 HV *stash;
396 MAGIC *mg; 408 MAGIC *mg;
397 409
… …
488 CvPADLIST (cv) = (AV *)POPs; 500 CvPADLIST (cv) = (AV *)POPs;
489 } 501 }
490 502
491 PUTBACK; 503 PUTBACK;
492 } 504 }
505
506 slf_frame = c->slf_frame;
493} 507}
494 508
495static void 509static void
496save_perl (pTHX_ Coro__State c) 510save_perl (pTHX_ Coro__State c)
497{ 511{
512 c->slf_frame = slf_frame;
513
498 { 514 {
499 dSP; 515 dSP;
500 I32 cxix = cxstack_ix; 516 I32 cxix = cxstack_ix;
501 PERL_CONTEXT *ccstk = cxstack; 517 PERL_CONTEXT *ccstk = cxstack;
502 PERL_SI *top_si = PL_curstackinfo; 518 PERL_SI *top_si = PL_curstackinfo;
… …
569 #undef VAR 585 #undef VAR
570 } 586 }
571} 587}
572 588
573/* 589/*
574 * allocate various perl stacks. This is an exact copy 590 * allocate various perl stacks. This is almost an exact copy
575 * of perl.c:init_stacks, except that it uses less memory 591 * of perl.c:init_stacks, except that it uses less memory
576 * on the (sometimes correct) assumption that coroutines do 592 * on the (sometimes correct) assumption that coroutines do
577 * not usually need a lot of stackspace. 593 * not usually need a lot of stackspace.
578 */ 594 */
579#if CORO_PREFER_PERL_FUNCTIONS 595#if CORO_PREFER_PERL_FUNCTIONS
… …
622 638
623/* 639/*
624 * destroy the stacks, the callchain etc... 640 * destroy the stacks, the callchain etc...
625 */ 641 */
626static void 642static void
627coro_destroy_stacks (pTHX) 643coro_destruct_stacks (pTHX)
628{ 644{
629 while (PL_curstackinfo->si_next) 645 while (PL_curstackinfo->si_next)
630 PL_curstackinfo = PL_curstackinfo->si_next; 646 PL_curstackinfo = PL_curstackinfo->si_next;
631 647
632 while (PL_curstackinfo) 648 while (PL_curstackinfo)
… …
781 797
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 798 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783} 799}
784 800
785static void 801static void
802prepare_nop (pTHX_ struct coro_transfer_args *ta)
803{
804 /* kind of mega-hacky, but works */
805 ta->next = ta->prev = (struct coro *)ta;
806}
807
808static int
809slf_check_nop (pTHX_ struct CoroSLF *frame)
810{
811 return 0;
812}
813
814static void
786coro_setup (pTHX_ struct coro *coro) 815coro_setup (pTHX_ struct coro *coro)
787{ 816{
788 /* 817 /*
789 * emulate part of the perl startup here. 818 * emulate part of the perl startup here.
790 */ 819 */
… …
810 GvSV (PL_defgv) = newSV (0); 839 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0; 840 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0); 841 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 842 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv)); 843 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 844 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
816 845
817 { 846 {
818 dSP; 847 dSP;
819 LOGOP myop; 848 UNOP myop;
820 849
821 Zero (&myop, 1, LOGOP); 850 Zero (&myop, 1, UNOP);
822 myop.op_next = Nullop; 851 myop.op_next = Nullop;
823 myop.op_flags = OPf_WANT_VOID; 852 myop.op_flags = OPf_WANT_VOID;
824 853
825 PUSHMARK (SP); 854 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 855 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
… …
829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 858 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
830 SPAGAIN; 859 SPAGAIN;
831 } 860 }
832 861
833 /* this newly created coroutine might be run on an existing cctx which most 862 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub. 863 * 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 */ 864 */
838 ENTER; 865 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
866 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
839} 867}
840 868
841static void 869static void
842coro_destroy (pTHX_ struct coro *coro) 870coro_destruct (pTHX_ struct coro *coro)
843{ 871{
844 if (!IN_DESTRUCT) 872 if (!IN_DESTRUCT)
845 { 873 {
846 /* restore all saved variables and stuff */ 874 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0); 875 LEAVE_SCOPE (0);
… …
869 SvREFCNT_dec (PL_warnhook); 897 SvREFCNT_dec (PL_warnhook);
870 898
871 SvREFCNT_dec (coro->saved_deffh); 899 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw); 900 SvREFCNT_dec (coro->throw);
873 901
874 coro_destroy_stacks (aTHX); 902 coro_destruct_stacks (aTHX);
875} 903}
876 904
877static void 905INLINE void
878free_coro_mortal (pTHX) 906free_coro_mortal (pTHX)
879{ 907{
880 if (expect_true (coro_mortal)) 908 if (expect_true (coro_mortal))
881 { 909 {
882 SvREFCNT_dec (coro_mortal); 910 SvREFCNT_dec (coro_mortal);
… …
916 : cx->blk_gimme == G_SCALAR ? bot + 1 944 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot; 945 : bot;
918 946
919 av_extend (av, top - bot); 947 av_extend (av, top - bot);
920 while (bot < top) 948 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++)); 949 av_push (av, SvREFCNT_inc_NN (*bot++));
922 950
923 PL_runops = RUNOPS_DEFAULT; 951 PL_runops = RUNOPS_DEFAULT;
924 ENTER; 952 ENTER;
925 SAVETMPS; 953 SAVETMPS;
926 EXTEND (SP, 3); 954 EXTEND (SP, 3);
… …
1006 1034
1007 TAINT_NOT; 1035 TAINT_NOT;
1008 return 0; 1036 return 0;
1009} 1037}
1010 1038
1039static void
1040prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1041{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0;
1044}
1045
1011/* inject a fake call to Coro::State::_cctx_init into the execution */ 1046/* 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 */ 1047/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */ 1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
1014static void NOINLINE 1050static void NOINLINE
1015cctx_prepare (pTHX_ coro_cctx *cctx) 1051cctx_prepare (pTHX_ coro_cctx *cctx)
1016{ 1052{
1017 dSP; 1053 dSP;
1018 LOGOP myop; 1054 UNOP myop;
1019 1055
1020 PL_top_env = &PL_start_env; 1056 PL_top_env = &PL_start_env;
1021 1057
1022 if (cctx->flags & CC_TRACE) 1058 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace; 1059 PL_runops = runops_trace;
1024 1060
1025 Zero (&myop, 1, LOGOP); 1061 Zero (&myop, 1, UNOP);
1026 myop.op_next = PL_op; 1062 myop.op_next = PL_op;
1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1028 1064
1029 PUSHMARK (SP); 1065 PUSHMARK (SP);
1030 EXTEND (SP, 2); 1066 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1067 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1033 PUTBACK; 1069 PUTBACK;
1034 PL_op = (OP *)&myop; 1070 PL_op = (OP *)&myop;
1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1036 SPAGAIN; 1072 SPAGAIN;
1037} 1073}
1038 1074
1075/* the tail of transfer: execute stuff we can only do after a transfer */
1076INLINE void
1077transfer_tail (pTHX)
1078{
1079 struct coro *next = (struct coro *)transfer_next;
1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083 free_coro_mortal (aTHX);
1084
1085 if (expect_false (next->throw))
1086 {
1087 SV *exception = sv_2mortal (next->throw);
1088
1089 next->throw = 0;
1090 sv_setsv (ERRSV, exception);
1091 croak (0);
1092 }
1093}
1094
1039/* 1095/*
1040 * this is a _very_ stripped down perl interpreter ;) 1096 * this is a _very_ stripped down perl interpreter ;)
1041 */ 1097 */
1042static void 1098static void
1043cctx_run (void *arg) 1099cctx_run (void *arg)
1044{ 1100{
1101#ifdef USE_ITHREADS
1102# if CORO_PTHREAD
1103 PERL_SET_CONTEXT (coro_thx);
1104# endif
1105#endif
1106 {
1045 dTHX; 1107 dTHX;
1046 1108
1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1109 /* normally we would need to skip the entersub here */
1048 UNLOCK; 1110 /* 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; 1111 /* PL_nop = PL_nop->op_next */
1052 1112
1053 /* inject a fake subroutine call to cctx_init */ 1113 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg); 1114 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055 1115
1116 /* cctx_run is the alternative tail of transfer() */
1117 /* TODO: throwing an exception here might be deadly, VERIFY */
1118 transfer_tail (aTHX);
1119
1056 /* somebody or something will hit me for both perl_run and PL_restartop */ 1120 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op; 1121 PL_restartop = PL_op;
1058 perl_run (PL_curinterp); 1122 perl_run (PL_curinterp);
1059 1123
1060 /* 1124 /*
1061 * If perl-run returns we assume exit() was being called or the coro 1125 * 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) 1126 * 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 1127 * 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" 1128 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept 1129 * coroutine as Coro has no such concept
1066 */ 1130 */
1067 PL_top_env = main_top_env; 1131 PL_top_env = main_top_env;
1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 }
1069} 1134}
1070 1135
1071static coro_cctx * 1136static coro_cctx *
1072cctx_new () 1137cctx_new ()
1073{ 1138{
1074 coro_cctx *cctx; 1139 coro_cctx *cctx;
1140
1141 ++cctx_count;
1142 New (0, cctx, 1, coro_cctx);
1143
1144 cctx->gen = cctx_gen;
1145 cctx->flags = 0;
1146 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1147
1148 return cctx;
1149}
1150
1151/* create a new cctx only suitable as source */
1152static coro_cctx *
1153cctx_new_empty ()
1154{
1155 coro_cctx *cctx = cctx_new ();
1156
1157 cctx->sptr = 0;
1158 coro_create (&cctx->cctx, 0, 0, 0, 0);
1159
1160 return cctx;
1161}
1162
1163/* create a new cctx suitable as destination/running a perl interpreter */
1164static coro_cctx *
1165cctx_new_run ()
1166{
1167 coro_cctx *cctx = cctx_new ();
1075 void *stack_start; 1168 void *stack_start;
1076 size_t stack_size; 1169 size_t stack_size;
1077 1170
1078 ++cctx_count;
1079
1080 Newz (0, cctx, 1, coro_cctx);
1081
1082#if HAVE_MMAP 1171#if HAVE_MMAP
1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1172 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1084 /* mmap supposedly does allocate-on-write for us */ 1173 /* 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); 1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1086 1175
1087 if (cctx->sptr != (void *)-1) 1176 if (cctx->sptr != (void *)-1)
1088 { 1177 {
1089# if CORO_STACKGUARD 1178 #if CORO_STACKGUARD
1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1091# endif 1180 #endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1181 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED; 1183 cctx->flags |= CC_MAPPED;
1095 } 1184 }
1096 else 1185 else
1097#endif 1186#endif
1098 { 1187 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long); 1188 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long); 1189 New (0, cctx->sptr, cctx_stacksize, long);
1101 1190
1102 if (!cctx->sptr) 1191 if (!cctx->sptr)
1103 { 1192 {
1104 perror ("FATAL: unable to allocate stack for coroutine"); 1193 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1105 _exit (EXIT_FAILURE); 1194 _exit (EXIT_FAILURE);
1106 } 1195 }
1107 1196
1108 stack_start = cctx->sptr; 1197 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize; 1198 stack_size = cctx->ssize;
1110 } 1199 }
1111 1200
1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1201 #if CORO_USE_VALGRIND
1202 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1203 #endif
1204
1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1205 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1114 1206
1115 return cctx; 1207 return cctx;
1116} 1208}
1117 1209
… …
1120{ 1212{
1121 if (!cctx) 1213 if (!cctx)
1122 return; 1214 return;
1123 1215
1124 --cctx_count; 1216 --cctx_count;
1217 coro_destroy (&cctx->cctx);
1125 1218
1219 /* coro_transfer creates new, empty cctx's */
1220 if (cctx->sptr)
1221 {
1126#if CORO_USE_VALGRIND 1222 #if CORO_USE_VALGRIND
1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1223 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1128#endif 1224 #endif
1129 1225
1130#if HAVE_MMAP 1226#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED) 1227 if (cctx->flags & CC_MAPPED)
1132 munmap (cctx->sptr, cctx->ssize); 1228 munmap (cctx->sptr, cctx->ssize);
1133 else 1229 else
1134#endif 1230#endif
1135 Safefree (cctx->sptr); 1231 Safefree (cctx->sptr);
1232 }
1136 1233
1137 Safefree (cctx); 1234 Safefree (cctx);
1138} 1235}
1139 1236
1140/* wether this cctx should be destructed */ 1237/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1238#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1142 1239
1143static coro_cctx * 1240static coro_cctx *
1144cctx_get (pTHX) 1241cctx_get (pTHX)
1145{ 1242{
1146 while (expect_true (cctx_first)) 1243 while (expect_true (cctx_first))
… …
1153 return cctx; 1250 return cctx;
1154 1251
1155 cctx_destroy (cctx); 1252 cctx_destroy (cctx);
1156 } 1253 }
1157 1254
1158 return cctx_new (); 1255 return cctx_new_run ();
1159} 1256}
1160 1257
1161static void 1258static void
1162cctx_put (coro_cctx *cctx) 1259cctx_put (coro_cctx *cctx)
1163{ 1260{
1261 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1262
1164 /* free another cctx if overlimit */ 1263 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1264 if (expect_false (cctx_idle >= cctx_max_idle))
1166 { 1265 {
1167 coro_cctx *first = cctx_first; 1266 coro_cctx *first = cctx_first;
1168 cctx_first = first->next; 1267 cctx_first = first->next;
1169 --cctx_idle; 1268 --cctx_idle;
1170 1269
… …
1182transfer_check (pTHX_ struct coro *prev, struct coro *next) 1281transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{ 1282{
1184 if (expect_true (prev != next)) 1283 if (expect_true (prev != next))
1185 { 1284 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1285 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"); 1286 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1188 1287
1189 if (expect_false (next->flags & CF_RUNNING)) 1288 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"); 1289 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1191 1290
1192 if (expect_false (next->flags & CF_DESTROYED)) 1291 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"); 1292 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1194 1293
1195#if !PERL_VERSION_ATLEAST (5,10,0) 1294#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1295 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"); 1296 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1198#endif 1297#endif
1199 } 1298 }
1200} 1299}
1201 1300
1202/* always use the TRANSFER macro */ 1301/* always use the TRANSFER macro */
1203static void NOINLINE 1302static void NOINLINE
1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1303transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1205{ 1304{
1206 dSTACKLEVEL; 1305 dSTACKLEVEL;
1207 static volatile int has_throw;
1208 1306
1209 /* sometimes transfer is only called to set idle_sp */ 1307 /* sometimes transfer is only called to set idle_sp */
1210 if (expect_false (!next)) 1308 if (expect_false (!next))
1211 { 1309 {
1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1310 ((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 */ 1311 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 } 1312 }
1215 else if (expect_true (prev != next)) 1313 else if (expect_true (prev != next))
1216 { 1314 {
1217 coro_cctx *prev__cctx; 1315 coro_cctx *prev__cctx;
1218 1316
1219 if (expect_false (prev->flags & CF_NEW)) 1317 if (expect_false (prev->flags & CF_NEW))
1220 { 1318 {
1221 /* create a new empty context */ 1319 /* create a new empty/source context */
1222 Newz (0, prev->cctx, 1, coro_cctx); 1320 prev->cctx = cctx_new_empty ();
1223 prev->flags &= ~CF_NEW; 1321 prev->flags &= ~CF_NEW;
1224 prev->flags |= CF_RUNNING; 1322 prev->flags |= CF_RUNNING;
1225 } 1323 }
1226 1324
1227 prev->flags &= ~CF_RUNNING; 1325 prev->flags &= ~CF_RUNNING;
1228 next->flags |= CF_RUNNING; 1326 next->flags |= CF_RUNNING;
1229
1230 LOCK;
1231 1327
1232 /* first get rid of the old state */ 1328 /* first get rid of the old state */
1233 save_perl (aTHX_ prev); 1329 save_perl (aTHX_ prev);
1234 1330
1235 if (expect_false (next->flags & CF_NEW)) 1331 if (expect_false (next->flags & CF_NEW))
… …
1242 else 1338 else
1243 load_perl (aTHX_ next); 1339 load_perl (aTHX_ next);
1244 1340
1245 prev__cctx = prev->cctx; 1341 prev__cctx = prev->cctx;
1246 1342
1247 /* possibly "free" the cctx */ 1343 /* possibly untie and reuse the cctx */
1248 if (expect_true ( 1344 if (expect_true (
1249 prev__cctx->idle_sp == STACKLEVEL 1345 prev__cctx->idle_sp == (void *)stacklevel
1250 && !(prev__cctx->flags & CC_TRACE) 1346 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx 1347 && !force_cctx
1252 )) 1348 ))
1253 { 1349 {
1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1350 /* 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)); 1351 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1256 1352
1257 prev->cctx = 0; 1353 prev->cctx = 0;
1258 1354
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1355 /* 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 */ 1356 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1268 ++next->usecount; 1364 ++next->usecount;
1269 1365
1270 if (expect_true (!next->cctx)) 1366 if (expect_true (!next->cctx))
1271 next->cctx = cctx_get (aTHX); 1367 next->cctx = cctx_get (aTHX);
1272 1368
1273 has_throw = !!next->throw; 1369 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1370 transfer_next = next;
1274 1371
1275 if (expect_false (prev__cctx != next->cctx)) 1372 if (expect_false (prev__cctx != next->cctx))
1276 { 1373 {
1277 prev__cctx->top_env = PL_top_env; 1374 prev__cctx->top_env = PL_top_env;
1278 PL_top_env = next->cctx->top_env; 1375 PL_top_env = next->cctx->top_env;
1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1376 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1280 } 1377 }
1281 1378
1282 free_coro_mortal (aTHX); 1379 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 } 1380 }
1298} 1381}
1299
1300struct transfer_args
1301{
1302 struct coro *prev, *next;
1303};
1304 1382
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1383#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) 1384#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1307 1385
1308/** high level stuff ********************************************************/ 1386/** high level stuff ********************************************************/
… …
1310static int 1388static int
1311coro_state_destroy (pTHX_ struct coro *coro) 1389coro_state_destroy (pTHX_ struct coro *coro)
1312{ 1390{
1313 if (coro->flags & CF_DESTROYED) 1391 if (coro->flags & CF_DESTROYED)
1314 return 0; 1392 return 0;
1393
1394 if (coro->on_destroy)
1395 coro->on_destroy (aTHX_ coro);
1315 1396
1316 coro->flags |= CF_DESTROYED; 1397 coro->flags |= CF_DESTROYED;
1317 1398
1318 if (coro->flags & CF_READY) 1399 if (coro->flags & CF_READY)
1319 { 1400 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1401 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */ 1402 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready; 1403 --coro_nready;
1324 UNLOCK;
1325 } 1404 }
1326 else 1405 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1406 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1328 1407
1329 if (coro->mainstack && coro->mainstack != main_mainstack) 1408 if (coro->mainstack && coro->mainstack != main_mainstack)
1330 { 1409 {
1331 struct coro temp; 1410 struct coro temp;
1332 1411
1333 if (coro->flags & CF_RUNNING) 1412 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1334 croak ("FATAL: tried to destroy currently running coroutine");
1335 1413
1336 save_perl (aTHX_ &temp); 1414 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro); 1415 load_perl (aTHX_ coro);
1338 1416
1339 coro_destroy (aTHX_ coro); 1417 coro_destruct (aTHX_ coro);
1340 1418
1341 load_perl (aTHX_ &temp); 1419 load_perl (aTHX_ &temp);
1342 1420
1343 coro->slot = 0; 1421 coro->slot = 0;
1344 } 1422 }
… …
1390# define MGf_DUP 0 1468# define MGf_DUP 0
1391#endif 1469#endif
1392}; 1470};
1393 1471
1394static void 1472static void
1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1473prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1396{ 1474{
1397 ta->prev = SvSTATE (prev_sv); 1475 ta->prev = SvSTATE (prev_sv);
1398 ta->next = SvSTATE (next_sv); 1476 ta->next = SvSTATE (next_sv);
1399 TRANSFER_CHECK (*ta); 1477 TRANSFER_CHECK (*ta);
1400} 1478}
1401 1479
1402static void 1480static void
1403api_transfer (SV *prev_sv, SV *next_sv) 1481api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1404{ 1482{
1405 dTHX;
1406 struct transfer_args ta; 1483 struct coro_transfer_args ta;
1407 1484
1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1409 TRANSFER (ta, 1); 1486 TRANSFER (ta, 1);
1410} 1487}
1411 1488
… …
1428 1505
1429 return 0; 1506 return 0;
1430} 1507}
1431 1508
1432static int 1509static int
1433api_ready (SV *coro_sv) 1510api_ready (pTHX_ SV *coro_sv)
1434{ 1511{
1435 dTHX;
1436 struct coro *coro; 1512 struct coro *coro;
1437 SV *sv_hook; 1513 SV *sv_hook;
1438 void (*xs_hook)(void); 1514 void (*xs_hook)(void);
1439 1515
1440 if (SvROK (coro_sv)) 1516 if (SvROK (coro_sv))
… …
1445 if (coro->flags & CF_READY) 1521 if (coro->flags & CF_READY)
1446 return 0; 1522 return 0;
1447 1523
1448 coro->flags |= CF_READY; 1524 coro->flags |= CF_READY;
1449 1525
1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook; 1526 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook; 1527 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454 1528
1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1529 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1456 ++coro_nready; 1530 ++coro_nready;
1457 1531
1458 UNLOCK;
1459
1460 if (sv_hook) 1532 if (sv_hook)
1461 { 1533 {
1462 dSP; 1534 dSP;
1463 1535
1464 ENTER; 1536 ENTER;
… …
1478 1550
1479 return 1; 1551 return 1;
1480} 1552}
1481 1553
1482static int 1554static int
1483api_is_ready (SV *coro_sv) 1555api_is_ready (pTHX_ SV *coro_sv)
1484{ 1556{
1485 dTHX;
1486 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1557 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1487} 1558}
1488 1559
1489static void 1560INLINE void
1490prepare_schedule (pTHX_ struct transfer_args *ta) 1561prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1491{ 1562{
1492 SV *prev_sv, *next_sv; 1563 SV *prev_sv, *next_sv;
1493 1564
1494 for (;;) 1565 for (;;)
1495 { 1566 {
1496 LOCK;
1497 next_sv = coro_deq (aTHX); 1567 next_sv = coro_deq (aTHX);
1498 1568
1499 /* nothing to schedule: call the idle handler */ 1569 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv)) 1570 if (expect_false (!next_sv))
1501 { 1571 {
1502 dSP; 1572 dSP;
1503 UNLOCK;
1504 1573
1505 ENTER; 1574 ENTER;
1506 SAVETMPS; 1575 SAVETMPS;
1507 1576
1508 PUSHMARK (SP); 1577 PUSHMARK (SP);
… …
1518 ta->next = SvSTATE (next_sv); 1587 ta->next = SvSTATE (next_sv);
1519 1588
1520 /* cannot transfer to destroyed coros, skip and look for next */ 1589 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED)) 1590 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 { 1591 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv); 1592 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */ 1593 /* coro_nready has already been taken care of by destroy */
1526 continue; 1594 continue;
1527 } 1595 }
1528 1596
1529 --coro_nready; 1597 --coro_nready;
1530 UNLOCK;
1531 break; 1598 break;
1532 } 1599 }
1533 1600
1534 /* free this only after the transfer */ 1601 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current); 1602 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv); 1603 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta); 1604 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY); 1605 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1539 ta->next->flags &= ~CF_READY; 1606 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv); 1607 SvRV_set (coro_current, next_sv);
1541 1608
1542 LOCK;
1543 free_coro_mortal (aTHX); 1609 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv; 1610 coro_mortal = prev_sv;
1545 UNLOCK;
1546} 1611}
1547 1612
1548static void 1613INLINE void
1549prepare_cede (pTHX_ struct transfer_args *ta) 1614prepare_cede (pTHX_ struct coro_transfer_args *ta)
1550{ 1615{
1551 api_ready (coro_current); 1616 api_ready (aTHX_ coro_current);
1552 prepare_schedule (aTHX_ ta); 1617 prepare_schedule (aTHX_ ta);
1553} 1618}
1554 1619
1620INLINE void
1621prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1622{
1623 SV *prev = SvRV (coro_current);
1624
1625 if (coro_nready)
1626 {
1627 prepare_schedule (aTHX_ ta);
1628 api_ready (aTHX_ prev);
1629 }
1630 else
1631 prepare_nop (aTHX_ ta);
1632}
1633
1634static void
1635api_schedule (pTHX)
1636{
1637 struct coro_transfer_args ta;
1638
1639 prepare_schedule (aTHX_ &ta);
1640 TRANSFER (ta, 1);
1641}
1642
1555static int 1643static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta) 1644api_cede (pTHX)
1557{ 1645{
1558 if (coro_nready) 1646 struct coro_transfer_args ta;
1559 { 1647
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta); 1648 prepare_cede (aTHX_ &ta);
1562 api_ready (prev); 1649
1650 if (expect_true (ta.prev != ta.next))
1651 {
1652 TRANSFER (ta, 1);
1563 return 1; 1653 return 1;
1564 } 1654 }
1565 else 1655 else
1566 return 0; 1656 return 0;
1567} 1657}
1568 1658
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 1659static int
1580api_cede (void) 1660api_cede_notself (pTHX)
1581{ 1661{
1582 dTHX; 1662 if (coro_nready)
1663 {
1583 struct transfer_args ta; 1664 struct coro_transfer_args ta;
1584 1665
1585 prepare_cede (aTHX_ &ta); 1666 prepare_cede_notself (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1589 TRANSFER (ta, 1); 1667 TRANSFER (ta, 1);
1590 return 1; 1668 return 1;
1591 } 1669 }
1592 else 1670 else
1593 return 0; 1671 return 0;
1594} 1672}
1595 1673
1596static int 1674static 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) 1675api_trace (pTHX_ SV *coro_sv, int flags)
1613{ 1676{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv); 1677 struct coro *coro = SvSTATE (coro_sv);
1616 1678
1617 if (flags & CC_TRACE) 1679 if (flags & CC_TRACE)
1618 { 1680 {
1619 if (!coro->cctx) 1681 if (!coro->cctx)
1620 coro->cctx = cctx_new (); 1682 coro->cctx = cctx_new_run ();
1621 else if (!(coro->cctx->flags & CC_TRACE)) 1683 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack"); 1684 croak ("cannot enable tracing on coroutine with custom stack,");
1623 1685
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1686 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 } 1687 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1688 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 { 1689 {
… …
1632 else 1694 else
1633 coro->slot->runops = RUNOPS_DEFAULT; 1695 coro->slot->runops = RUNOPS_DEFAULT;
1634 } 1696 }
1635} 1697}
1636 1698
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/*****************************************************************************/ 1699/*****************************************************************************/
1654/* PerlIO::cede */ 1700/* PerlIO::cede */
1655 1701
1656typedef struct 1702typedef struct
1657{ 1703{
… …
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede); 1730 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime (); 1731 double now = nvtime ();
1686 1732
1687 if (now >= self->next) 1733 if (now >= self->next)
1688 { 1734 {
1689 api_cede (); 1735 api_cede (aTHX);
1690 self->next = now + self->every; 1736 self->next = now + self->every;
1691 } 1737 }
1692 1738
1693 return PerlIOBuf_flush (f); 1739 return PerlIOBuf_flush (aTHX_ f);
1694} 1740}
1695 1741
1696static PerlIO_funcs PerlIO_cede = 1742static PerlIO_funcs PerlIO_cede =
1697{ 1743{
1698 sizeof(PerlIO_funcs), 1744 sizeof(PerlIO_funcs),
… …
1723 PerlIOBuf_get_ptr, 1769 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt, 1770 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt, 1771 PerlIOBuf_set_ptrcnt,
1726}; 1772};
1727 1773
1774/*****************************************************************************/
1775
1776static const CV *slf_cv; /* for quick consistency check */
1777
1778static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1779static SV *slf_arg0;
1780static SV *slf_arg1;
1781static SV *slf_arg2;
1782
1783/* this restores the stack in the case we patched the entersub, to */
1784/* recreate the stack frame as perl will on following calls */
1785/* since entersub cleared the stack */
1786static OP *
1787pp_restore (pTHX)
1788{
1789 dSP;
1790
1791 PUSHMARK (SP);
1792
1793 EXTEND (SP, 3);
1794 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1795 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1796 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1797 PUSHs ((SV *)CvGV (slf_cv));
1798
1799 RETURNOP (slf_restore.op_first);
1800}
1801
1802static void
1803slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1804{
1805 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1806}
1807
1808static void
1809slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1810{
1811 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1812
1813 frame->prepare = slf_prepare_set_stacklevel;
1814 frame->check = slf_check_nop;
1815 frame->data = (void *)SvIV (arg [0]);
1816}
1817
1818static void
1819slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1820{
1821 SV **arg = (SV **)slf_frame.data;
1822
1823 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1824}
1825
1826static void
1827slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1828{
1829 if (items != 2)
1830 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1831
1832 frame->prepare = slf_prepare_transfer;
1833 frame->check = slf_check_nop;
1834 frame->data = (void *)arg; /* let's hope it will stay valid */
1835}
1836
1837static void
1838slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1839{
1840 frame->prepare = prepare_schedule;
1841 frame->check = slf_check_nop;
1842}
1843
1844static void
1845slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1846{
1847 frame->prepare = prepare_cede;
1848 frame->check = slf_check_nop;
1849}
1850
1851static void
1852slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1853{
1854 frame->prepare = prepare_cede_notself;
1855 frame->check = slf_check_nop;
1856}
1857
1858/* we hijack an hopefully unused CV flag for our purposes */
1859#define CVf_SLF 0x4000
1860
1861/*
1862 * these not obviously related functions are all rolled into one
1863 * function to increase chances that they all will call transfer with the same
1864 * stack offset
1865 * SLF stands for "schedule-like-function".
1866 */
1867static OP *
1868pp_slf (pTHX)
1869{
1870 I32 checkmark; /* mark SP to see how many elements check has pushed */
1871
1872 /* set up the slf frame, unless it has already been set-up */
1873 /* the latter happens when a new coro has been started */
1874 /* or when a new cctx was attached to an existing coroutine */
1875 if (expect_true (!slf_frame.prepare))
1876 {
1877 /* first iteration */
1878 dSP;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 SV *gv = *sp;
1882
1883 /* do a quick consistency check on the "function" object, and if it isn't */
1884 /* for us, divert to the real entersub */
1885 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1886 return PL_ppaddr[OP_ENTERSUB](aTHX);
1887
1888 /* pop args */
1889 SP = PL_stack_base + POPMARK;
1890
1891 if (!(PL_op->op_flags & OPf_STACKED))
1892 {
1893 /* ampersand-form of call, use @_ instead of stack */
1894 AV *av = GvAV (PL_defgv);
1895 arg = AvARRAY (av);
1896 items = AvFILLp (av) + 1;
1897 }
1898
1899 PUTBACK;
1900
1901 /* now call the init function, which needs to set up slf_frame */
1902 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1903 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1904 }
1905
1906 /* now that we have a slf_frame, interpret it! */
1907 /* we use a callback system not to make the code needlessly */
1908 /* complicated, but so we can run multiple perl coros from one cctx */
1909
1910 do
1911 {
1912 struct coro_transfer_args ta;
1913
1914 slf_frame.prepare (aTHX_ &ta);
1915 TRANSFER (ta, 0);
1916
1917 checkmark = PL_stack_sp - PL_stack_base;
1918 }
1919 while (slf_frame.check (aTHX_ &slf_frame));
1920
1921 {
1922 dSP;
1923 SV **bot = PL_stack_base + checkmark;
1924 int gimme = GIMME_V;
1925
1926 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1927
1928 /* make sure we put something on the stack in scalar context */
1929 if (gimme == G_SCALAR)
1930 {
1931 if (sp == bot)
1932 XPUSHs (&PL_sv_undef);
1933
1934 SP = bot + 1;
1935 }
1936
1937 PUTBACK;
1938 }
1939
1940 return NORMAL;
1941}
1942
1943static void
1944api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1945{
1946 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1947
1948 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1949 && PL_op->op_ppaddr != pp_slf)
1950 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1951
1952 if (items > 3)
1953 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1954
1955 CvFLAGS (cv) |= CVf_SLF;
1956 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1957 slf_cv = cv;
1958
1959 /* we patch the op, and then re-run the whole call */
1960 /* we have to put the same argument on the stack for this to work */
1961 /* and this will be done by pp_restore */
1962 slf_restore.op_next = (OP *)&slf_restore;
1963 slf_restore.op_type = OP_CUSTOM;
1964 slf_restore.op_ppaddr = pp_restore;
1965 slf_restore.op_first = PL_op;
1966
1967 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1968 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1969 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1970
1971 PL_op->op_ppaddr = pp_slf;
1972
1973 PL_op = (OP *)&slf_restore;
1974}
1975
1976/*****************************************************************************/
1977
1978static void
1979coro_semaphore_adjust (AV *av, int adjust)
1980{
1981 SV *count_sv = AvARRAY (av)[0];
1982 IV count = SvIVX (count_sv);
1983
1984 count += adjust;
1985 SvIVX (count_sv) = count;
1986
1987 /* now wake up as many waiters as possible */
1988 while (count > 0 && AvFILLp (av) >= count)
1989 {
1990 SV *cb;
1991
1992 /* swap first two elements so we can shift a waiter */
1993 AvARRAY (av)[0] = AvARRAY (av)[1];
1994 AvARRAY (av)[1] = count_sv;
1995 cb = av_shift (av);
1996
1997 if (SvOBJECT (cb))
1998 api_ready (aTHX_ cb);
1999 else
2000 croak ("callbacks not yet supported");
2001
2002 SvREFCNT_dec (cb);
2003
2004 --count;
2005 }
2006}
2007
2008static void
2009coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2010{
2011 /* call $sem->adjust (0) to possibly wake up some waiters */
2012 coro_semaphore_adjust ((AV *)coro->slf_frame.data, 0);
2013}
2014
2015static int
2016slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2017{
2018 AV *av = (AV *)frame->data;
2019 SV *count_sv = AvARRAY (av)[0];
2020
2021 if (SvIVX (count_sv) > 0)
2022 {
2023 SvSTATE (coro_current)->on_destroy = 0;
2024 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2025 return 0;
2026 }
2027 else
2028 {
2029 int i;
2030 /* if we were woken up but can't down, we look through the whole */
2031 /* waiters list and only add us if we aren't in there already */
2032 /* this avoids some degenerate memory usage cases */
2033
2034 for (i = 1; i <= AvFILLp (av); ++i)
2035 if (AvARRAY (av)[i] == SvRV (coro_current))
2036 return 1;
2037
2038 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2039 return 1;
2040 }
2041}
2042
2043static void
2044slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2045{
2046 AV *av = (AV *)SvRV (arg [0]);
2047
2048 if (SvIVX (AvARRAY (av)[0]) > 0)
2049 {
2050 frame->data = (void *)av;
2051 frame->prepare = prepare_nop;
2052 }
2053 else
2054 {
2055 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2056
2057 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2058 frame->prepare = prepare_schedule;
2059
2060 /* to avoid race conditions when a woken-up coro gets terminated */
2061 /* we arrange for a temporary on_destroy that calls adjust (0) */
2062 SvSTATE (coro_current)->on_destroy = coro_semaphore_on_destroy;
2063 }
2064
2065 frame->check = slf_check_semaphore_down;
2066
2067}
2068
2069/*****************************************************************************/
2070
2071#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2072
2073/* create a closure from XS, returns a code reference */
2074/* the arg can be accessed via GENSUB_ARG from the callback */
2075/* the callback must use dXSARGS/XSRETURN */
2076static SV *
2077gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2078{
2079 CV *cv = (CV *)NEWSV (0, 0);
2080
2081 sv_upgrade ((SV *)cv, SVt_PVCV);
2082
2083 CvANON_on (cv);
2084 CvISXSUB_on (cv);
2085 CvXSUB (cv) = xsub;
2086 GENSUB_ARG = arg;
2087
2088 return newRV_noinc ((SV *)cv);
2089}
2090
2091/*****************************************************************************/
1728 2092
1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2093MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1730 2094
1731PROTOTYPES: DISABLE 2095PROTOTYPES: DISABLE
1732 2096
1733BOOT: 2097BOOT:
1734{ 2098{
1735#ifdef USE_ITHREADS 2099#ifdef USE_ITHREADS
1736 MUTEX_INIT (&coro_mutex); 2100 MUTEX_INIT (&coro_lock);
2101# if CORO_PTHREAD
2102 coro_thx = PERL_GET_CONTEXT;
2103# endif
1737#endif 2104#endif
1738 BOOT_PAGESIZE; 2105 BOOT_PAGESIZE;
1739 2106
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2107 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2108 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
… …
1759 main_top_env = PL_top_env; 2126 main_top_env = PL_top_env;
1760 2127
1761 while (main_top_env->je_prev) 2128 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev; 2129 main_top_env = main_top_env->je_prev;
1763 2130
2131 {
2132 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2133
2134 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2135 hv_store_ent (PL_custom_op_names, slf,
2136 newSVpv ("coro_slf", 0), 0);
2137
2138 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2139 hv_store_ent (PL_custom_op_descs, slf,
2140 newSVpv ("coro schedule like function", 0), 0);
2141 }
2142
1764 coroapi.ver = CORO_API_VERSION; 2143 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION; 2144 coroapi.rev = CORO_API_REVISION;
2145
1766 coroapi.transfer = api_transfer; 2146 coroapi.transfer = api_transfer;
2147
2148 coroapi.sv_state = SvSTATE_;
2149 coroapi.execute_slf = api_execute_slf;
2150 coroapi.prepare_nop = prepare_nop;
2151 coroapi.prepare_schedule = prepare_schedule;
2152 coroapi.prepare_cede = prepare_cede;
2153 coroapi.prepare_cede_notself = prepare_cede_notself;
1767 2154
1768 { 2155 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0); 2156 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770 2157
1771 if (!svp) croak ("Time::HiRes is required"); 2158 if (!svp) croak ("Time::HiRes is required");
… …
1804 av_push (coro->args, newSVsv (ST (i))); 2191 av_push (coro->args, newSVsv (ST (i)));
1805} 2192}
1806 OUTPUT: 2193 OUTPUT:
1807 RETVAL 2194 RETVAL
1808 2195
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 2196void
1813_set_stacklevel (...) 2197_set_stacklevel (...)
1814 ALIAS: 2198 CODE:
1815 Coro::State::transfer = 1 2199 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 2200
1823 PUTBACK; 2201void
1824 switch (ix) 2202transfer (...)
1825 { 2203 PROTOTYPE: $$
1826 case 0: 2204 CODE:
1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2205 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 2206
1861bool 2207bool
1862_destroy (SV *coro_sv) 2208_destroy (SV *coro_sv)
1863 CODE: 2209 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2210 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
… …
1871 CODE: 2217 CODE:
1872 _exit (code); 2218 _exit (code);
1873 2219
1874int 2220int
1875cctx_stacksize (int new_stacksize = 0) 2221cctx_stacksize (int new_stacksize = 0)
2222 PROTOTYPE: ;$
1876 CODE: 2223 CODE:
1877 RETVAL = coro_stacksize; 2224 RETVAL = cctx_stacksize;
1878 if (new_stacksize) 2225 if (new_stacksize)
2226 {
1879 coro_stacksize = new_stacksize; 2227 cctx_stacksize = new_stacksize;
2228 ++cctx_gen;
2229 }
1880 OUTPUT: 2230 OUTPUT:
1881 RETVAL 2231 RETVAL
1882 2232
1883int 2233int
2234cctx_max_idle (int max_idle = 0)
2235 PROTOTYPE: ;$
2236 CODE:
2237 RETVAL = cctx_max_idle;
2238 if (max_idle > 1)
2239 cctx_max_idle = max_idle;
2240 OUTPUT:
2241 RETVAL
2242
2243int
1884cctx_count () 2244cctx_count ()
2245 PROTOTYPE:
1885 CODE: 2246 CODE:
1886 RETVAL = cctx_count; 2247 RETVAL = cctx_count;
1887 OUTPUT: 2248 OUTPUT:
1888 RETVAL 2249 RETVAL
1889 2250
1890int 2251int
1891cctx_idle () 2252cctx_idle ()
2253 PROTOTYPE:
1892 CODE: 2254 CODE:
1893 RETVAL = cctx_idle; 2255 RETVAL = cctx_idle;
1894 OUTPUT: 2256 OUTPUT:
1895 RETVAL 2257 RETVAL
1896 2258
1897void 2259void
1898list () 2260list ()
2261 PROTOTYPE:
1899 PPCODE: 2262 PPCODE:
1900{ 2263{
1901 struct coro *coro; 2264 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next) 2265 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv) 2266 if (coro->hv)
… …
1962 RETVAL = boolSV (coro->flags & ix); 2325 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT: 2326 OUTPUT:
1964 RETVAL 2327 RETVAL
1965 2328
1966void 2329void
2330throw (Coro::State self, SV *throw = &PL_sv_undef)
2331 PROTOTYPE: $;$
2332 CODE:
2333 SvREFCNT_dec (self->throw);
2334 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2335
2336void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2338 PROTOTYPE: $;$
2339 C_ARGS: aTHX_ coro, flags
1968 2340
1969SV * 2341SV *
1970has_cctx (Coro::State coro) 2342has_cctx (Coro::State coro)
1971 PROTOTYPE: $ 2343 PROTOTYPE: $
1972 CODE: 2344 CODE:
… …
1980 CODE: 2352 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2353 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT: 2354 OUTPUT:
1983 RETVAL 2355 RETVAL
1984 2356
1985IV 2357UV
1986rss (Coro::State coro) 2358rss (Coro::State coro)
1987 PROTOTYPE: $ 2359 PROTOTYPE: $
1988 ALIAS: 2360 ALIAS:
1989 usecount = 1 2361 usecount = 1
1990 CODE: 2362 CODE:
… …
1996 OUTPUT: 2368 OUTPUT:
1997 RETVAL 2369 RETVAL
1998 2370
1999void 2371void
2000force_cctx () 2372force_cctx ()
2373 PROTOTYPE:
2001 CODE: 2374 CODE:
2002 struct coro *coro = SvSTATE (coro_current); 2375 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0; 2376 coro->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 2377
2012void 2378void
2013swap_defsv (Coro::State self) 2379swap_defsv (Coro::State self)
2014 PROTOTYPE: $ 2380 PROTOTYPE: $
2015 ALIAS: 2381 ALIAS:
2016 swap_defav = 1 2382 swap_defav = 1
2017 CODE: 2383 CODE:
2018 if (!self->slot) 2384 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state"); 2385 croak ("cannot swap state with coroutine that has no saved state,");
2020 else 2386 else
2021 { 2387 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 2388 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 2389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024 2390
… …
2049 2415
2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2416 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2051 coro_ready[i] = newAV (); 2417 coro_ready[i] = newAV ();
2052 2418
2053 { 2419 {
2054 SV *sv = perl_get_sv ("Coro::API", TRUE); 2420 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2056 2421
2057 coroapi.schedule = api_schedule; 2422 coroapi.schedule = api_schedule;
2058 coroapi.cede = api_cede; 2423 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself; 2424 coroapi.cede_notself = api_cede_notself;
2060 coroapi.ready = api_ready; 2425 coroapi.ready = api_ready;
2061 coroapi.is_ready = api_is_ready; 2426 coroapi.is_ready = api_is_ready;
2062 coroapi.nready = &coro_nready; 2427 coroapi.nready = coro_nready;
2063 coroapi.current = coro_current; 2428 coroapi.current = coro_current;
2064 2429
2065 GCoroAPI = &coroapi; 2430 GCoroAPI = &coroapi;
2066 sv_setiv (sv, (IV)&coroapi); 2431 sv_setiv (sv, (IV)&coroapi);
2067 SvREADONLY_on (sv); 2432 SvREADONLY_on (sv);
2068 } 2433 }
2069} 2434}
2435
2436void
2437schedule (...)
2438 CODE:
2439 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2440
2441void
2442cede (...)
2443 CODE:
2444 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2445
2446void
2447cede_notself (...)
2448 CODE:
2449 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2070 2450
2071void 2451void
2072_set_current (SV *current) 2452_set_current (SV *current)
2073 PROTOTYPE: $ 2453 PROTOTYPE: $
2074 CODE: 2454 CODE:
2075 SvREFCNT_dec (SvRV (coro_current)); 2455 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2456 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2077 2457
2078void 2458void
2079_set_readyhook (SV *hook) 2459_set_readyhook (SV *hook)
2080 PROTOTYPE: $ 2460 PROTOTYPE: $
2081 CODE: 2461 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook); 2462 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0; 2463 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
2086 2464
2087int 2465int
2088prio (Coro::State coro, int newprio = 0) 2466prio (Coro::State coro, int newprio = 0)
2467 PROTOTYPE: $;$
2089 ALIAS: 2468 ALIAS:
2090 nice = 1 2469 nice = 1
2091 CODE: 2470 CODE:
2092{ 2471{
2093 RETVAL = coro->prio; 2472 RETVAL = coro->prio;
… …
2108 2487
2109SV * 2488SV *
2110ready (SV *self) 2489ready (SV *self)
2111 PROTOTYPE: $ 2490 PROTOTYPE: $
2112 CODE: 2491 CODE:
2113 RETVAL = boolSV (api_ready (self)); 2492 RETVAL = boolSV (api_ready (aTHX_ self));
2114 OUTPUT: 2493 OUTPUT:
2115 RETVAL 2494 RETVAL
2116 2495
2117int 2496int
2118nready (...) 2497nready (...)
… …
2141 SvREFCNT_dec (old); 2520 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n"); 2521 croak ("\3async_pool terminate\2\n");
2143 } 2522 }
2144 2523
2145 SvREFCNT_dec (coro->saved_deffh); 2524 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2525 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2147 2526
2148 hv_store (hv, "desc", sizeof ("desc") - 1, 2527 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2528 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150 2529
2151 invoke_av = (AV *)SvRV (invoke); 2530 invoke_av = (AV *)SvRV (invoke);
… …
2155 2534
2156 if (len > 0) 2535 if (len > 0)
2157 { 2536 {
2158 av_fill (defav, len - 1); 2537 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i) 2538 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2539 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2161 } 2540 }
2162
2163 SvREFCNT_dec (invoke);
2164} 2541}
2165 2542
2166void 2543void
2167_pool_2 (SV *cb) 2544_pool_2 (SV *cb)
2168 CODE: 2545 CODE:
… …
2172 sv_setsv (cb, &PL_sv_undef); 2549 sv_setsv (cb, &PL_sv_undef);
2173 2550
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2551 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0; 2552 coro->saved_deffh = 0;
2176 2553
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2554 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2555 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 { 2556 {
2180 SV *old = PL_diehook; 2557 SV *old = PL_diehook;
2181 PL_diehook = 0; 2558 PL_diehook = 0;
2182 SvREFCNT_dec (old); 2559 SvREFCNT_dec (old);
… …
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2565 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189 2566
2190 coro->prio = 0; 2567 coro->prio = 0;
2191 2568
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2569 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0); 2570 api_trace (aTHX_ coro_current, 0);
2194 2571
2195 av_push (av_async_pool, newSVsv (coro_current)); 2572 av_push (av_async_pool, newSVsv (coro_current));
2196} 2573}
2197 2574
2198#if 0 2575
2576MODULE = Coro::State PACKAGE = Coro::AIO
2199 2577
2200void 2578void
2201_generator_call (...) 2579_get_state (SV *self)
2202 PROTOTYPE: @ 2580 PROTOTYPE: $
2203 PPCODE: 2581 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{ 2582{
2213 struct coro *coro; 2583 AV *defav = GvAV (PL_defgv);
2214 MAGIC *mg; 2584 AV *av = newAV ();
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i; 2585 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)); 2586 SV *data_sv = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL); 2587 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2257 SvCUR_set (RETVAL, sizeof (struct io_state)); 2588 SvCUR_set (data_sv, sizeof (struct io_state));
2258 SvPOK_only (RETVAL); 2589 SvPOK_only (data_sv);
2259 2590
2260 data->errorno = errno; 2591 data->errorno = errno;
2261 data->laststype = PL_laststype; 2592 data->laststype = PL_laststype;
2262 data->laststatval = PL_laststatval; 2593 data->laststatval = PL_laststatval;
2263 data->statcache = PL_statcache; 2594 data->statcache = PL_statcache;
2595
2596 av_extend (av, AvFILLp (defav) + 1 + 1);
2597
2598 for (i = 0; i <= AvFILLp (defav); ++i)
2599 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2600
2601 av_push (av, data_sv);
2602
2603 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2604
2605 api_ready (aTHX_ self);
2264} 2606}
2265 OUTPUT:
2266 RETVAL
2267 2607
2268void 2608void
2269_set_state (char *data_) 2609_set_state (SV *state)
2270 PROTOTYPE: $ 2610 PROTOTYPE: $
2271 CODE: 2611 PPCODE:
2272{ 2612{
2273 struct io_state *data = (void *)data_; 2613 AV *av = (AV *)SvRV (state);
2614 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2615 int i;
2274 2616
2275 errno = data->errorno; 2617 errno = data->errorno;
2276 PL_laststype = data->laststype; 2618 PL_laststype = data->laststype;
2277 PL_laststatval = data->laststatval; 2619 PL_laststatval = data->laststatval;
2278 PL_statcache = data->statcache; 2620 PL_statcache = data->statcache;
2621
2622 EXTEND (SP, AvFILLp (av));
2623 for (i = 0; i < AvFILLp (av); ++i)
2624 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2279} 2625}
2280 2626
2281 2627
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent 2628MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283 2629
2284BOOT: 2630BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE); 2631 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286 2632
2287SV * 2633void
2288_schedule (...) 2634_schedule (...)
2289 PROTOTYPE: @
2290 CODE: 2635 CODE:
2291{ 2636{
2292 static int incede; 2637 static int incede;
2293 2638
2294 api_cede_notself (); 2639 api_cede_notself (aTHX);
2295 2640
2296 ++incede; 2641 ++incede;
2297 while (coro_nready >= incede && api_cede ()) 2642 while (coro_nready >= incede && api_cede (aTHX))
2298 ; 2643 ;
2299 2644
2300 sv_setsv (sv_activity, &PL_sv_undef); 2645 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede) 2646 if (coro_nready >= incede)
2302 { 2647 {
… …
2312 2657
2313MODULE = Coro::State PACKAGE = PerlIO::cede 2658MODULE = Coro::State PACKAGE = PerlIO::cede
2314 2659
2315BOOT: 2660BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede); 2661 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2662
2663MODULE = Coro::State PACKAGE = Coro::Semaphore
2664
2665SV *
2666new (SV *klass, SV *count_ = 0)
2667 CODE:
2668{
2669 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2670 AV *av = newAV ();
2671 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2672 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2673}
2674 OUTPUT:
2675 RETVAL
2676
2677SV *
2678count (SV *self)
2679 CODE:
2680 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2681 OUTPUT:
2682 RETVAL
2683
2684void
2685up (SV *self, int adjust = 1)
2686 ALIAS:
2687 adjust = 1
2688 CODE:
2689 coro_semaphore_adjust ((AV *)SvRV (self), ix ? adjust : 1);
2690
2691void
2692down (SV *self)
2693 CODE:
2694 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2695
2696void
2697try (SV *self)
2698 PPCODE:
2699{
2700 AV *av = (AV *)SvRV (self);
2701 SV *count_sv = AvARRAY (av)[0];
2702 IV count = SvIVX (count_sv);
2703
2704 if (count > 0)
2705 {
2706 --count;
2707 SvIVX (count_sv) = count;
2708 XSRETURN_YES;
2709 }
2710 else
2711 XSRETURN_NO;
2712}
2713
2714void
2715waiters (SV *self)
2716 CODE:
2717{
2718 AV *av = (AV *)SvRV (self);
2719
2720 if (GIMME_V == G_SCALAR)
2721 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2722 else
2723 {
2724 int i;
2725 EXTEND (SP, AvFILLp (av) + 1 - 1);
2726 for (i = 1; i <= AvFILLp (av); ++i)
2727 PUSHs (newSVsv (AvARRAY (av)[i]));
2728 }
2729}
2730

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