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Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.469 by root, Fri Jul 14 02:43:50 2017 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
6 17
7#include <signal.h> 18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
8 21
9#ifdef HAVE_MMAP 22#include <stddef.h>
10# include <unistd.h> 23#include <stdio.h>
11# include <sys/mman.h> 24#include <errno.h>
12# ifndef MAP_ANON 25#include <assert.h>
13# ifdef MAP_ANONYMOUS 26
14# define MAP_ANON MAP_ANONYMOUS 27#ifndef SvREFCNT_dec_NN
15# else 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
16# undef HAVE_MMAP
17# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
18# endif 47# endif
48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
49# define PadlistMAX(pl) AvFILLp (pl)
50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
51# define PadARRAY AvARRAY
52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
19#endif 54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
20 61
21#define MAY_FLUSH /* increases codesize and is rarely used */ 62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
22 67
23#define SUB_INIT "Coro::State::initialize" 68#if defined(_WIN32)
24#define UCORO_STATE "_coro_state" 69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
74#else
75# include <inttypes.h> /* most portable stdint.h */
76#endif
25 77
26/* The next macro should declare a variable stacklevel that contains and approximation 78/* the maximum number of idle cctx that will be pooled */
27 * to the current C stack pointer. Its property is that it changes with each call 79static int cctx_max_idle = 4;
28 * and should be unique. */ 80
81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
82# define HAS_SCOPESTACK_NAME 1
83#endif
84
85/* prefer perl internal functions over our own? */
86#ifndef CORO_PREFER_PERL_FUNCTIONS
87# define CORO_PREFER_PERL_FUNCTIONS 0
88#endif
89
90/* The next macros try to return the current stack pointer, in an as
91 * portable way as possible. */
92#if __GNUC__ >= 4
93# define dSTACKLEVEL int stacklevel_dummy
94# define STACKLEVEL __builtin_frame_address (0)
95#else
96# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 97# define STACKLEVEL ((void *)&stacklevel)
98#endif
30 99
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 100#define IN_DESTRUCT PL_dirty
32
33#define labs(l) ((l) >= 0 ? (l) : -(l))
34 101
35#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
36 104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
108# endif
109#endif
110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
118# endif
119#endif
120
121#if PERL_VERSION_ATLEAST(5,24,0)
122# define SUB_ARGARRAY PL_curpad[0]
123#else
124# define SUB_ARGARRAY (SV *)cx->blk_sub.argarray
125#endif
126
127/* perl usually suppressed asserts. for debugging, we sometimes force it to be on */
128#if 0
129# undef NDEBUG
130# include <assert.h>
131#endif
132
133static double (*nvtime)(); /* so why doesn't it take void? */
134static void (*u2time)(pTHX_ UV ret[2]);
135
136/* we hijack an hopefully unused CV flag for our purposes */
137#define CVf_SLF 0x4000
138static OP *pp_slf (pTHX);
139static void slf_destroy (pTHX_ struct coro *coro);
140
141static U32 cctx_gen;
142static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 143static struct CoroAPI coroapi;
144static AV *main_mainstack; /* used to differentiate between $main and others */
145static JMPENV *main_top_env;
146static HV *coro_state_stash, *coro_stash;
147static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 148
39/* this is actually not only the c stack but also c registers etc... */ 149static AV *av_destroy; /* destruction queue */
150static SV *sv_manager; /* the manager coro */
151static SV *sv_idle; /* $Coro::idle */
152
153static GV *irsgv; /* $/ */
154static GV *stdoutgv; /* *STDOUT */
155static SV *rv_diehook;
156static SV *rv_warnhook;
157
158/* async_pool helper stuff */
159static SV *sv_pool_rss;
160static SV *sv_pool_size;
161static SV *sv_async_pool_idle; /* description string */
162static AV *av_async_pool; /* idle pool */
163static SV *sv_Coro; /* class string */
164static CV *cv_pool_handler;
165
166/* Coro::AnyEvent */
167static SV *sv_activity;
168
169/* enable processtime/realtime profiling */
170static char enable_times;
171typedef U32 coro_ts[2];
172static coro_ts time_real, time_cpu;
173static char times_valid;
174
175static struct coro_cctx *cctx_first;
176static int cctx_count, cctx_idle;
177
178enum
179{
180 CC_MAPPED = 0x01,
181 CC_NOREUSE = 0x02, /* throw this away after tracing */
182 CC_TRACE = 0x04,
183 CC_TRACE_SUB = 0x08, /* trace sub calls */
184 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186};
187
188/* this is a structure representing a c-level coroutine */
40typedef struct { 189typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 190{
42 int usecnt; /* shared by how many coroutines */ 191 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 192
193 /* the stack */
194 struct coro_stack stack;
195
196 /* cpu state */
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198#ifndef NDEBUG
199 JMPENV *idle_te; /* same as idle_sp, but for top_env */
200#endif
201 JMPENV *top_env;
45 coro_context cctx; 202 coro_context cctx;
46 203
47 void *sptr; 204 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 205#if CORO_USE_VALGRIND
49} coro_stack; 206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
50 210
211static coro_cctx *cctx_current; /* the currently running cctx */
212
213/*****************************************************************************/
214
215static MGVTBL coro_state_vtbl;
216
217enum
218{
219 CF_RUNNING = 0x0001, /* coroutine is running */
220 CF_READY = 0x0002, /* coroutine is ready */
221 CF_NEW = 0x0004, /* has never been switched to */
222 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
223 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
224 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 #define VARx(name,expr,type) type name;
231 #include "state.h"
232} perl_slots;
233
234/* how many context stack entries do we need for perl_slots */
235#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
236
237/* this is a structure representing a perl-level coroutine */
51struct coro { 238struct coro
52 /* the optional C context */ 239{
53 coro_stack *stack; 240 /* the C coroutine allocated to this perl coroutine, if any */
54 void *cursp; 241 coro_cctx *cctx;
55 int gencnt;
56 242
57 /* optionally saved, might be zero */ 243 /* ready queue */
58 AV *defav; 244 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 245
66 /* the stacks and related info (callchain etc..) */ 246 /* state data */
67 PERL_SI *curstackinfo; 247 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 248 AV *mainstack;
70 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 250
251 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255
256 /* statistics */
257 int usecount; /* number of transfers to this coro */
258
259 /* coro process data */
260 int prio;
261 SV *except; /* exception to be thrown */
262 SV *rouse_cb; /* last rouse callback */
263 AV *on_destroy; /* callbacks or coros to notify on destroy */
264 AV *status; /* the exit status list */
265
266 /* async_pool */
267 SV *saved_deffh;
268 SV *invoke_cb;
269 AV *invoke_av;
270
271 /* on_enter/on_leave */
272 AV *on_enter; AV *on_enter_xs;
273 AV *on_leave; AV *on_leave_xs;
274
275 /* swap_sv */
276 AV *swap_sv;
277
278 /* times */
279 coro_ts t_cpu, t_real;
280
281 /* linked list */
282 struct coro *next, *prev;
96}; 283};
97 284
98typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
100 287
101static AV *main_mainstack; /* used to differentiate between $main and others */ 288/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 289/* and get copied between struct coro and these variables */
290/* the main reason we don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
292
293/** Coro ********************************************************************/
294
295#define CORO_PRIO_MAX 3
296#define CORO_PRIO_HIGH 1
297#define CORO_PRIO_NORMAL 0
298#define CORO_PRIO_LOW -1
299#define CORO_PRIO_IDLE -3
300#define CORO_PRIO_MIN -4
301
302/* for Coro.pm */
303static SV *coro_current;
304static SV *coro_readyhook;
305static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
306static CV *cv_coro_run;
307static struct coro *coro_first;
308#define coro_nready coroapi.nready
309
310/** JIT *********************************************************************/
311
312#if CORO_JIT
313 /* APPLE doesn't have mmap though */
314 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
315 #ifndef CORO_JIT_TYPE
316 #if ECB_AMD64 && CORO_JIT_UNIXY
317 #define CORO_JIT_TYPE "amd64-unix"
318 #elif __i386 && CORO_JIT_UNIXY
319 #define CORO_JIT_TYPE "x86-unix"
320 #endif
321 #endif
322#endif
323
324#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
325 #undef CORO_JIT
326#endif
327
328#if CORO_JIT
329 typedef void (*load_save_perl_slots_type)(perl_slots *);
330 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
331#endif
332
333/** Coro::Select ************************************************************/
334
335static OP *(*coro_old_pp_sselect) (pTHX);
103static SV *ucoro_state_sv; 336static SV *coro_select_select;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106 337
107/* mostly copied from op.c:cv_clone2 */ 338/* horrible hack, but if it works... */
108STATIC AV * 339static OP *
109clone_padlist (AV *protopadlist) 340coro_pp_sselect (pTHX)
110{ 341{
111 AV *av; 342 dSP;
112 I32 ix; 343 PUSHMARK (SP - 4); /* fake argument list */
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 344 XPUSHs (coro_select_select);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 345 PUTBACK;
115 SV **pname = AvARRAY (protopad_name); 346
116 SV **ppad = AvARRAY (protopad); 347 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
117 I32 fname = AvFILLp (protopad_name); 348 PL_op->op_flags |= OPf_STACKED;
118 I32 fpad = AvFILLp (protopad); 349 PL_op->op_private = 0;
119 AV *newpadlist, *newpad_name, *newpad; 350 return PL_ppaddr [OP_ENTERSUB](aTHX);
351}
352
353/** time stuff **************************************************************/
354
355#ifdef HAS_GETTIMEOFDAY
356
357ecb_inline void
358coro_u2time (pTHX_ UV ret[2])
359{
360 struct timeval tv;
361 gettimeofday (&tv, 0);
362
363 ret [0] = tv.tv_sec;
364 ret [1] = tv.tv_usec;
365}
366
367ecb_inline double
368coro_nvtime (void)
369{
370 struct timeval tv;
371 gettimeofday (&tv, 0);
372
373 return tv.tv_sec + tv.tv_usec * 1e-6;
374}
375
376ecb_inline void
377time_init (pTHX)
378{
379 nvtime = coro_nvtime;
380 u2time = coro_u2time;
381}
382
383#else
384
385ecb_inline void
386time_init (pTHX)
387{
120 SV **npad; 388 SV **svp;
121 389
122 newpad_name = newAV (); 390 require_pv ("Time/HiRes.pm");
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125 391
126 newpad = newAV (); 392 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129 393
130 newpadlist = newAV (); 394 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
395 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
396
397 nvtime = INT2PTR (double (*)(), SvIV (*svp));
398
399 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
400 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
401}
402
403#endif
404
405/** lowlevel stuff **********************************************************/
406
407static SV * ecb_noinline
408coro_get_sv (pTHX_ const char *name, int create)
409{
410#if PERL_VERSION_ATLEAST (5,10,0)
411 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
412 get_sv (name, create);
413#endif
414 return get_sv (name, create);
415}
416
417static AV * ecb_noinline
418coro_get_av (pTHX_ const char *name, int create)
419{
420#if PERL_VERSION_ATLEAST (5,10,0)
421 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
422 get_av (name, create);
423#endif
424 return get_av (name, create);
425}
426
427static HV * ecb_noinline
428coro_get_hv (pTHX_ const char *name, int create)
429{
430#if PERL_VERSION_ATLEAST (5,10,0)
431 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
432 get_hv (name, create);
433#endif
434 return get_hv (name, create);
435}
436
437ecb_inline void
438coro_times_update (void)
439{
440#ifdef coro_clock_gettime
441 struct timespec ts;
442
443 ts.tv_sec = ts.tv_nsec = 0;
444 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
445 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
446
447 ts.tv_sec = ts.tv_nsec = 0;
448 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
449 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
450#else
451 dTHX;
452 UV tv[2];
453
454 u2time (aTHX_ tv);
455 time_real [0] = tv [0];
456 time_real [1] = tv [1] * 1000;
457#endif
458}
459
460ecb_inline void
461coro_times_add (struct coro *c)
462{
463 c->t_real [1] += time_real [1];
464 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
465 c->t_real [0] += time_real [0];
466
467 c->t_cpu [1] += time_cpu [1];
468 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
469 c->t_cpu [0] += time_cpu [0];
470}
471
472ecb_inline void
473coro_times_sub (struct coro *c)
474{
475 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
476 c->t_real [1] -= time_real [1];
477 c->t_real [0] -= time_real [0];
478
479 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
480 c->t_cpu [1] -= time_cpu [1];
481 c->t_cpu [0] -= time_cpu [0];
482}
483
484/*****************************************************************************/
485/* magic glue */
486
487#define CORO_MAGIC_type_cv 26
488#define CORO_MAGIC_type_state PERL_MAGIC_ext
489
490#define CORO_MAGIC_NN(sv, type) \
491 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
492 ? SvMAGIC (sv) \
493 : mg_find (sv, type))
494
495#define CORO_MAGIC(sv, type) \
496 (ecb_expect_true (SvMAGIC (sv)) \
497 ? CORO_MAGIC_NN (sv, type) \
498 : 0)
499
500#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
501#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
502
503ecb_inline MAGIC *
504SvSTATEhv_p (pTHX_ SV *coro)
505{
506 MAGIC *mg;
507
508 if (ecb_expect_true (
509 SvTYPE (coro) == SVt_PVHV
510 && (mg = CORO_MAGIC_state (coro))
511 && mg->mg_virtual == &coro_state_vtbl
512 ))
513 return mg;
514
515 return 0;
516}
517
518ecb_inline struct coro *
519SvSTATE_ (pTHX_ SV *coro_sv)
520{
521 MAGIC *mg;
522
523 if (SvROK (coro_sv))
524 coro_sv = SvRV (coro_sv);
525
526 mg = SvSTATEhv_p (aTHX_ coro_sv);
527 if (!mg)
528 croak ("Coro::State object required");
529
530 return (struct coro *)mg->mg_ptr;
531}
532
533#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
534
535/* faster than SvSTATE, but expects a coroutine hv */
536#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
537#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
538
539/*****************************************************************************/
540/* padlist management and caching */
541
542ecb_inline PADLIST *
543coro_derive_padlist (pTHX_ CV *cv)
544{
545 PADLIST *padlist = CvPADLIST (cv);
546 PADLIST *newpadlist;
547 PADNAMELIST *padnames;
548 PAD *newpad;
549 PADOFFSET off = PadlistMAX (padlist) + 1;
550
551#if NEWPADAPI
552
553 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
554 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
555 while (!PadlistARRAY (padlist)[off - 1])
556 --off;
557
558 Perl_pad_push (aTHX_ padlist, off);
559
560 newpad = PadlistARRAY (padlist)[off];
561 PadlistARRAY (padlist)[off] = 0;
562
563#else
564
565#if PERL_VERSION_ATLEAST (5,10,0)
566 Perl_pad_push (aTHX_ padlist, off);
567#else
568 Perl_pad_push (aTHX_ padlist, off, 1);
569#endif
570
571 newpad = PadlistARRAY (padlist)[off];
572 PadlistMAX (padlist) = off - 1;
573
574#endif
575
576 newPADLIST (newpadlist);
577#if !PERL_VERSION_ATLEAST(5,15,3)
578 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
131 AvREAL_off (newpadlist); 579 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name); 580#endif
133 av_store (newpadlist, 1, (SV *) newpad);
134 581
135 av = newAV (); /* will be @_ */ 582 /* Already extended to 2 elements by newPADLIST. */
136 av_extend (av, 0); 583 PadlistMAX (newpadlist) = 1;
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139 584
140 for (ix = fpad; ix > 0; ix--) 585 padnames = PadlistNAMES (padlist);
586 ++PadnamelistREFCNT (padnames);
587 PadlistNAMES (newpadlist) = padnames;
588
589 PadlistARRAY (newpadlist)[1] = newpad;
590
591 return newpadlist;
592}
593
594ecb_inline void
595free_padlist (pTHX_ PADLIST *padlist)
596{
597 /* may be during global destruction */
598 if (!IN_DESTRUCT)
141 { 599 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 600 I32 i = PadlistMAX (padlist);
143 if (namesv && namesv != &PL_sv_undef) 601
602 while (i > 0) /* special-case index 0 */
144 { 603 {
145 char *name = SvPVX (namesv); /* XXX */ 604 /* we try to be extra-careful here */
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 605 PAD *pad = PadlistARRAY (padlist)[i--];
147 { /* lexical from outside? */ 606
148 npad[ix] = SvREFCNT_inc (ppad[ix]); 607 if (pad)
149 } 608 {
150 else 609 I32 j = PadMAX (pad);
151 { /* our own lexical */ 610
152 SV *sv; 611 while (j >= 0)
153 if (*name == '&') 612 SvREFCNT_dec (PadARRAY (pad)[j--]);
613
614 PadMAX (pad) = -1;
154 sv = SvREFCNT_inc (ppad[ix]); 615 SvREFCNT_dec (pad);
155 else if (*name == '@')
156 sv = (SV *) newAV ();
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 } 616 }
165 } 617 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
167 {
168 npad[ix] = SvREFCNT_inc (ppad[ix]);
169 }
170 else
171 {
172 SV *sv = NEWSV (0, 0);
173 SvPADTMP_on (sv);
174 npad[ix] = sv;
175 }
176 }
177 618
178#if 0 /* return -ENOTUNDERSTOOD */ 619 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
179 /* Now that vars are all in place, clone nested closures. */
180 620
181 for (ix = fpad; ix > 0; ix--) { 621#if NEWPADAPI
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 622 Safefree (PadlistARRAY (padlist));
183 if (namesv 623 Safefree (padlist);
184 && namesv != &PL_sv_undef 624#else
185 && !(SvFLAGS(namesv) & SVf_FAKE)
186 && *SvPVX(namesv) == '&'
187 && CvCLONE(ppad[ix]))
188 {
189 CV *kid = cv_clone((CV*)ppad[ix]);
190 SvREFCNT_dec(ppad[ix]);
191 CvCLONE_on(kid);
192 SvPADMY_on(kid);
193 npad[ix] = (SV*)kid;
194 }
195 }
196#endif
197
198 return newpadlist;
199}
200
201#ifdef MAY_FLUSH
202STATIC void
203free_padlist (AV *padlist)
204{
205 /* may be during global destruction */
206 if (SvREFCNT(padlist))
207 {
208 I32 i = AvFILLp(padlist); 625 AvFILLp (padlist) = -1;
209 while (i >= 0) 626 AvREAL_off (padlist);
210 {
211 SV **svp = av_fetch(padlist, i--, FALSE);
212 SV *sv = svp ? *svp : Nullsv;
213 if (sv)
214 SvREFCNT_dec(sv);
215 }
216
217 SvREFCNT_dec((SV*)padlist); 627 SvREFCNT_dec ((SV*)padlist);
628#endif
629 }
630}
631
632static int
633coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
634{
635 PADLIST *padlist;
636 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
637 size_t len = *(size_t *)mg->mg_ptr;
638
639 /* perl manages to free our internal AV and _then_ call us */
640 if (IN_DESTRUCT)
641 return 0;
642
643 while (len--)
644 free_padlist (aTHX_ padlists[len]);
645
646 return 0;
647}
648
649static MGVTBL coro_cv_vtbl = {
650 0, 0, 0, 0,
651 coro_cv_free
652};
653
654/* the next two functions merely cache the padlists */
655ecb_inline void
656get_padlist (pTHX_ CV *cv)
657{
658 MAGIC *mg = CORO_MAGIC_cv (cv);
659 size_t *lenp;
660
661 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
662 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
663 else
664 {
665#if CORO_PREFER_PERL_FUNCTIONS
666 /* this is probably cleaner? but also slower! */
667 /* in practise, it seems to be less stable */
668 CV *cp = Perl_cv_clone (aTHX_ cv);
669 CvPADLIST (cv) = CvPADLIST (cp);
670 CvPADLIST (cp) = 0;
671 SvREFCNT_dec (cp);
672#else
673 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
674#endif
675 }
676}
677
678ecb_inline void
679put_padlist (pTHX_ CV *cv)
680{
681 MAGIC *mg = CORO_MAGIC_cv (cv);
682
683 if (ecb_expect_false (!mg))
684 {
685 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
686 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
687 mg->mg_len = 1; /* so mg_free frees mg_ptr */
688 }
689 else
690 Renew (mg->mg_ptr,
691 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
692 char);
693
694 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
695}
696
697/** load & save, init *******************************************************/
698
699ecb_inline void
700swap_sv (SV *a, SV *b)
701{
702 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
703 SV tmp;
704
705 /* swap sv_any */
706 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
707
708 /* swap sv_flags */
709 SvFLAGS (&tmp) = SvFLAGS (a);
710 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
711 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
712
713#if PERL_VERSION_ATLEAST (5,10,0)
714 /* perl 5.10 and later complicates this _quite_ a bit, but it also
715 * is much faster, so no quarrels here. alternatively, we could
716 * sv_upgrade to avoid this.
717 */
718 {
719 /* swap sv_u */
720 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
721
722 /* if SvANY points to the head, we need to adjust the pointers,
723 * as the pointer for a still points to b, and maybe vice versa.
724 */
725 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
726 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
727 svany_in_head_set |= 1 << SVt_NV;
728 #endif
729
730 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
731
732 if (svany_in_head (SvTYPE (a)))
733 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
734
735 if (svany_in_head (SvTYPE (b)))
736 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
218 } 737 }
219}
220#endif 738#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232} 739}
233 740
234STATIC void 741/* swap sv heads, at least logically */
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 {
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246}
247
248#ifdef MAY_FLUSH
249STATIC void
250flush_padlist_cache ()
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273
274#define SB do {
275#define SE } while (0)
276
277#define LOAD(state) load_state(aTHX_ (state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282static void 742static void
743swap_svs_enter (pTHX_ Coro__State c)
744{
745 int i;
746
747 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
748 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
749}
750
751static void
752swap_svs_leave (pTHX_ Coro__State c)
753{
754 int i;
755
756 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
757 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
758}
759
760#define SWAP_SVS_ENTER(coro) \
761 if (ecb_expect_false ((coro)->swap_sv)) \
762 swap_svs_enter (aTHX_ (coro))
763
764#define SWAP_SVS_LEAVE(coro) \
765 if (ecb_expect_false ((coro)->swap_sv)) \
766 swap_svs_leave (aTHX_ (coro))
767
768static void
769on_enterleave_call (pTHX_ SV *cb);
770
771static void
283load_state(pTHX_ Coro__State c) 772load_perl (pTHX_ Coro__State c)
284{ 773{
285 PL_dowarn = c->dowarn; 774 perl_slots *slot = c->slot;
286 PL_in_eval = c->in_eval; 775 c->slot = 0;
287 776
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack; 777 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314 778
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 779#if CORO_JIT
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 780 load_perl_slots (slot);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 781#else
782 #define VARx(name,expr,type) expr = slot->name;
783 #include "state.h"
784#endif
318 785
319 { 786 {
320 dSP; 787 dSP;
788
321 CV *cv; 789 CV *cv;
322 790
323 /* now do the ugly restore mess */ 791 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs)) 792 while (ecb_expect_true (cv = (CV *)POPs))
325 { 793 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */ 794 put_padlist (aTHX_ cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist; 795 CvDEPTH (cv) = PTR2IV (POPs);
332#ifdef USE_THREADS 796 CvPADLIST (cv) = (PADLIST *)POPs;
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 } 797 }
339 798
340 PUTBACK; 799 PUTBACK;
341 } 800 }
342}
343 801
802 slf_frame = c->slf_frame;
803 CORO_THROW = c->except;
804
805 if (ecb_expect_false (enable_times))
806 {
807 if (ecb_expect_false (!times_valid))
808 coro_times_update ();
809
810 coro_times_sub (c);
811 }
812
813 if (ecb_expect_false (c->on_enter))
814 {
815 int i;
816
817 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
818 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
819 }
820
821 if (ecb_expect_false (c->on_enter_xs))
822 {
823 int i;
824
825 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
826 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
827 }
828
829 SWAP_SVS_ENTER (c);
830}
831
344static void 832static void
345save_state(pTHX_ Coro__State c, int flags) 833save_perl (pTHX_ Coro__State c)
346{ 834{
835 SWAP_SVS_LEAVE (c);
836
837 if (ecb_expect_false (c->on_leave_xs))
838 {
839 int i;
840
841 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
842 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
843 }
844
845 if (ecb_expect_false (c->on_leave))
846 {
847 int i;
848
849 for (i = AvFILLp (c->on_leave); i >= 0; --i)
850 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
851 }
852
853 times_valid = 0;
854
855 if (ecb_expect_false (enable_times))
856 {
857 coro_times_update (); times_valid = 1;
858 coro_times_add (c);
859 }
860
861 c->except = CORO_THROW;
862 c->slf_frame = slf_frame;
863
347 { 864 {
348 dSP; 865 dSP;
349 I32 cxix = cxstack_ix; 866 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 867 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 868 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 870 /*
354 * the worst thing you can imagine happens first - we have to save 871 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 872 * (and reinitialize) all cv's in the whole callchain :(
356 */ 873 */
357 874
358 PUSHs (Nullsv); 875 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 876 /* this loop was inspired by pp_caller */
360 for (;;) 877 for (;;)
361 { 878 {
362 while (cxix >= 0) 879 while (ecb_expect_true (cxix >= 0))
363 { 880 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 881 PERL_CONTEXT *cx = &ccstk[cxix--];
365 882
366 if (CxTYPE(cx) == CXt_SUB) 883 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 884 {
368 CV *cv = cx->blk_sub.cv; 885 CV *cv = cx->blk_sub.cv;
886
369 if (CvDEPTH(cv)) 887 if (ecb_expect_true (CvDEPTH (cv)))
370 { 888 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2); 889 EXTEND (SP, 3);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384
385 PUSHs ((SV *)CvPADLIST(cv)); 890 PUSHs ((SV *)CvPADLIST (cv));
891 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
386 PUSHs ((SV *)cv); 892 PUSHs ((SV *)cv);
387 893
388 get_padlist (cv); /* this is a monster */ 894 CvDEPTH (cv) = 0;
895 get_padlist (aTHX_ cv);
389 } 896 }
390 } 897 }
391 else if (CxTYPE(cx) == CXt_FORMAT)
392 {
393 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 }
397 } 898 }
398 899
399 if (top_si->si_type == PERLSI_MAIN) 900 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
400 break; 901 break;
401 902
402 top_si = top_si->si_prev; 903 top_si = top_si->si_prev;
403 ccstk = top_si->si_cxstack; 904 ccstk = top_si->si_cxstack;
404 cxix = top_si->si_cxix; 905 cxix = top_si->si_cxix;
405 } 906 }
406 907
407 PUTBACK; 908 PUTBACK;
408 } 909 }
409 910
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 911 /* allocate some space on the context stack for our purposes */
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 912 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 913 {
914 unsigned int i;
413 915
414 c->dowarn = PL_dowarn; 916 for (i = 0; i < SLOT_COUNT; ++i)
415 c->in_eval = PL_in_eval; 917 CXINC;
416 918
417 c->curstackinfo = PL_curstackinfo; 919 cxstack_ix -= SLOT_COUNT; /* undo allocation */
418 c->curstack = PL_curstack; 920 }
921
419 c->mainstack = PL_mainstack; 922 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp; 923
421 c->op = PL_op; 924 {
422 c->curpad = PL_curpad; 925 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
423 c->stack_base = PL_stack_base; 926
424 c->stack_max = PL_stack_max; 927#if CORO_JIT
425 c->tmps_stack = PL_tmps_stack; 928 save_perl_slots (slot);
426 c->tmps_floor = PL_tmps_floor; 929#else
427 c->tmps_ix = PL_tmps_ix; 930 #define VARx(name,expr,type) slot->name = expr;
428 c->tmps_max = PL_tmps_max; 931 #include "state.h"
429 c->markstack = PL_markstack; 932#endif
430 c->markstack_ptr = PL_markstack_ptr; 933 }
431 c->markstack_max = PL_markstack_max;
432 c->scopestack = PL_scopestack;
433 c->scopestack_ix = PL_scopestack_ix;
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443} 934}
444 935
445/* 936/*
446 * allocate various perl stacks. This is an exact copy 937 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 938 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need 939 * on the (sometimes correct) assumption that coroutines do
449 * a lot of stackspace. 940 * not usually need a lot of stackspace.
450 */ 941 */
451STATIC void 942#if CORO_PREFER_PERL_FUNCTIONS
943# define coro_init_stacks(thx) init_stacks ()
944#else
945static void
452coro_init_stacks (pTHX) 946coro_init_stacks (pTHX)
453{ 947{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 948 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
455 PL_curstackinfo->si_type = PERLSI_MAIN; 949 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack; 950 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 951 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458 952
459 PL_stack_base = AvARRAY(PL_curstack); 953 PL_stack_base = AvARRAY(PL_curstack);
460 PL_stack_sp = PL_stack_base; 954 PL_stack_sp = PL_stack_base;
461 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 955 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462 956
463 New(50,PL_tmps_stack,96,SV*); 957 New(50,PL_tmps_stack,32,SV*);
464 PL_tmps_floor = -1; 958 PL_tmps_floor = -1;
465 PL_tmps_ix = -1; 959 PL_tmps_ix = -1;
466 PL_tmps_max = 96; 960 PL_tmps_max = 32;
467 961
468 New(54,PL_markstack,16,I32); 962 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack; 963 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16; 964 PL_markstack_max = PL_markstack + 16;
471 965
966#ifdef SET_MARK_OFFSET
472 SET_MARK_OFFSET; 967 SET_MARK_OFFSET;
968#endif
473 969
474 New(54,PL_scopestack,16,I32); 970 New(54,PL_scopestack,8,I32);
475 PL_scopestack_ix = 0; 971 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16; 972 PL_scopestack_max = 8;
973#if HAS_SCOPESTACK_NAME
974 New(54,PL_scopestack_name,8,const char*);
975#endif
477 976
478 New(54,PL_savestack,96,ANY); 977 New(54,PL_savestack,24,ANY);
479 PL_savestack_ix = 0; 978 PL_savestack_ix = 0;
480 PL_savestack_max = 96; 979 PL_savestack_max = 24;
980#if PERL_VERSION_ATLEAST (5,24,0)
981 /* perl 5.24 moves SS_MAXPUSH optimisation from */
982 /* the header macros to PL_savestack_max */
983 PL_savestack_max -= SS_MAXPUSH;
984#endif
481 985
986#if !PERL_VERSION_ATLEAST (5,10,0)
482 New(54,PL_retstack,8,OP*); 987 New(54,PL_retstack,4,OP*);
483 PL_retstack_ix = 0; 988 PL_retstack_ix = 0;
484 PL_retstack_max = 8; 989 PL_retstack_max = 4;
990#endif
485} 991}
992#endif
486 993
487/* 994/*
488 * destroy the stacks, the callchain etc... 995 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */ 996 */
491STATIC void 997static void
492destroy_stacks(pTHX) 998coro_destruct_stacks (pTHX)
493{ 999{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next) 1000 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 1001 PL_curstackinfo = PL_curstackinfo->si_next;
507 1002
508 while (PL_curstackinfo) 1003 while (PL_curstackinfo)
509 { 1004 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 1005 PERL_SI *p = PL_curstackinfo->si_prev;
511 1006
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 1007 if (!IN_DESTRUCT)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 1008 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 1009
524 Safefree(PL_curstackinfo->si_cxstack); 1010 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 1011 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 1012 PL_curstackinfo = p;
527 } 1013 }
528 1014
529 Safefree(PL_tmps_stack); 1015 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 1016 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 1017 Safefree (PL_scopestack);
1018#if HAS_SCOPESTACK_NAME
1019 Safefree (PL_scopestack_name);
1020#endif
532 Safefree(PL_savestack); 1021 Safefree (PL_savestack);
1022#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree(PL_retstack); 1023 Safefree (PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 1024#endif
1025}
1026
1027#define CORO_RSS \
1028 rss += sizeof (SYM (curstackinfo)); \
1029 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1030 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1031 rss += SYM (tmps_max) * sizeof (SV *); \
1032 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1033 rss += SYM (scopestack_max) * sizeof (I32); \
1034 rss += SYM (savestack_max) * sizeof (ANY);
1035
1036static size_t
1037coro_rss (pTHX_ struct coro *coro)
1038{
1039 size_t rss = sizeof (*coro);
1040
1041 if (coro->mainstack)
1042 {
1043 if (coro->flags & CF_RUNNING)
553 { 1044 {
554 /*FIXME*//*D*//* reasonable stack size! */ 1045 #define SYM(sym) PL_ ## sym
555 stack->ssize = -4096 * sizeof (long); 1046 CORO_RSS;
556 New (0, stack->sptr, 4096, long); 1047 #undef SYM
557 } 1048 }
1049 else
1050 {
1051 #define SYM(sym) coro->slot->sym
1052 CORO_RSS;
1053 #undef SYM
1054 }
558 } 1055 }
1056
1057 return rss;
1058}
1059
1060/** provide custom get/set/clear methods for %SIG elements ******************/
1061
1062/* apparently < 5.8.8 */
1063#ifndef MgPV_nolen_const
1064#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1065 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1066 (const char*)(mg)->mg_ptr)
1067#endif
1068
1069/* this will be a patched copy of PL_vtbl_sigelem */
1070static MGVTBL coro_sigelem_vtbl;
1071
1072static int ecb_cold
1073coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1074{
1075 char *key = SvPV_nolen ((SV *)name);
1076
1077 /* do what mg_copy normally does */
1078 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1079 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1080
1081 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1082 if (*key == '_'
1083 && (strEQ (key, "__DIE__")
1084 || strEQ (key, "__WARN__")))
1085 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1086
1087 return 1;
1088}
1089
1090/* perl does not have a %SIG vtbl, we provide one so we can override */
1091/* the magic vtbl for the __DIE__ and __WARN__ members */
1092static const MGVTBL coro_sig_vtbl = {
1093 0, 0, 0, 0, 0,
1094 coro_sig_copy
1095};
1096
1097/*
1098 * This overrides the default magic get method of %SIG elements.
1099 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1100 * and instead of trying to save and restore the hash elements (extremely slow),
1101 * we just provide our own readback here.
1102 */
1103static int ecb_cold
1104coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1105{
1106 const char *s = MgPV_nolen_const (mg);
1107 /* the key must be either __DIE__ or __WARN__ here */
1108 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1109
1110 SV *ssv;
1111
1112 if (!*svp)
1113 ssv = &PL_sv_undef;
1114 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1115 ssv = sv_2mortal (newRV_inc (*svp));
559 else 1116 else
560 stack->sptr = 0; 1117 ssv = *svp;
561 1118
562 ctx->stack = stack; 1119 sv_setsv (sv, ssv);
1120 return 0;
563} 1121}
564 1122
1123static int ecb_cold
1124coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1125{
1126 const char *s = MgPV_nolen_const (mg);
1127 /* the key must be either __DIE__ or __WARN__ here */
1128 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1129
1130 SV *old = *svp;
1131 *svp = 0;
1132 SvREFCNT_dec (old);
1133 return 0;
1134}
1135
1136static int ecb_cold
1137coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1138{
1139 const char *s = MgPV_nolen_const (mg);
1140 /* the key must be either __DIE__ or __WARN__ here */
1141 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1142
1143 SV *old = *svp;
1144 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1145 SvREFCNT_dec (old);
1146 return 0;
1147}
1148
1149static void
1150prepare_nop (pTHX_ struct coro_transfer_args *ta)
1151{
1152 /* kind of mega-hacky, but works */
1153 ta->next = ta->prev = (struct coro *)ta;
1154}
1155
565static void 1156static int
566deallocate_stack (Coro__State ctx) 1157slf_check_nop (pTHX_ struct CoroSLF *frame)
567{ 1158{
568 coro_stack *stack = ctx->stack; 1159 return 0;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588} 1160}
589 1161
590static void 1162static int
591setup_coro (void *arg) 1163slf_check_repeat (pTHX_ struct CoroSLF *frame)
1164{
1165 return 1;
1166}
1167
1168/** coroutine stack handling ************************************************/
1169
1170static UNOP init_perl_op;
1171
1172ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1173init_perl (pTHX_ struct coro *coro)
592{ 1174{
593 /* 1175 /*
594 * emulate part of the perl startup here. 1176 * emulate part of the perl startup here.
595 */ 1177 */
1178 coro_init_stacks (aTHX);
1179
1180 PL_runops = RUNOPS_DEFAULT;
1181 PL_curcop = &PL_compiling;
1182 PL_in_eval = EVAL_NULL;
1183 PL_comppad = 0;
1184 PL_comppad_name = 0;
1185 PL_comppad_name_fill = 0;
1186 PL_comppad_name_floor = 0;
1187 PL_curpm = 0;
1188 PL_curpad = 0;
1189 PL_localizing = 0;
1190 PL_restartop = 0;
1191#if PERL_VERSION_ATLEAST (5,10,0)
1192 PL_parser = 0;
1193#endif
1194 PL_hints = 0;
1195
1196 /* recreate the die/warn hooks */
1197 PL_diehook = SvREFCNT_inc (rv_diehook);
1198 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1199
1200 GvSV (PL_defgv) = newSV (0);
1201 GvAV (PL_defgv) = coro->args; coro->args = 0;
1202 GvSV (PL_errgv) = newSV (0);
1203 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1204 GvHV (PL_hintgv) = newHV ();
1205#if PERL_VERSION_ATLEAST (5,10,0)
1206 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1207#endif
1208 PL_rs = newSVsv (GvSV (irsgv));
1209 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1210
1211 {
1212 dSP;
1213 UNOP myop;
1214
1215 Zero (&myop, 1, UNOP);
1216 myop.op_next = Nullop;
1217 myop.op_type = OP_ENTERSUB;
1218 myop.op_flags = OPf_WANT_VOID;
1219
1220 PUSHMARK (SP);
1221 PUSHs ((SV *)coro->startcv);
1222 PUTBACK;
1223 PL_op = (OP *)&myop;
1224 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1225 }
1226
1227 /* this newly created coroutine might be run on an existing cctx which most
1228 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1229 */
1230 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1231 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1232 slf_frame.destroy = 0;
1233
1234 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1235 init_perl_op.op_next = PL_op;
1236 init_perl_op.op_type = OP_ENTERSUB;
1237 init_perl_op.op_ppaddr = pp_slf;
1238 /* no flags etc. required, as an init function won't be called */
1239
1240 PL_op = (OP *)&init_perl_op;
1241
1242 /* copy throw, in case it was set before init_perl */
1243 CORO_THROW = coro->except;
1244
1245 SWAP_SVS_ENTER (coro);
1246
1247 if (ecb_expect_false (enable_times))
1248 {
1249 coro_times_update ();
1250 coro_times_sub (coro);
1251 }
1252}
1253
1254static void
1255coro_unwind_stacks (pTHX)
1256{
1257 if (!IN_DESTRUCT)
1258 {
1259 /* restore all saved variables and stuff */
1260 LEAVE_SCOPE (0);
1261 assert (PL_tmps_floor == -1);
1262
1263 /* free all temporaries */
1264 FREETMPS;
1265 assert (PL_tmps_ix == -1);
1266
1267 /* unwind all extra stacks */
1268 POPSTACK_TO (PL_mainstack);
1269
1270 /* unwind main stack */
1271 dounwind (-1);
1272 }
1273}
1274
1275static void
1276destroy_perl (pTHX_ struct coro *coro)
1277{
1278 SV *svf [9];
1279
1280 {
1281 SV *old_current = SvRV (coro_current);
1282 struct coro *current = SvSTATE (old_current);
1283
1284 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1285
1286 save_perl (aTHX_ current);
1287
1288 /* this will cause transfer_check to croak on block*/
1289 SvRV_set (coro_current, (SV *)coro->hv);
1290
1291 load_perl (aTHX_ coro);
1292
1293 /* restore swapped sv's */
1294 SWAP_SVS_LEAVE (coro);
1295
1296 coro_unwind_stacks (aTHX);
1297
1298 coro_destruct_stacks (aTHX);
1299
1300 /* now save some sv's to be free'd later */
1301 svf [0] = GvSV (PL_defgv);
1302 svf [1] = (SV *)GvAV (PL_defgv);
1303 svf [2] = GvSV (PL_errgv);
1304 svf [3] = (SV *)PL_defoutgv;
1305 svf [4] = PL_rs;
1306 svf [5] = GvSV (irsgv);
1307 svf [6] = (SV *)GvHV (PL_hintgv);
1308 svf [7] = PL_diehook;
1309 svf [8] = PL_warnhook;
1310 assert (9 == sizeof (svf) / sizeof (*svf));
1311
1312 SvRV_set (coro_current, old_current);
1313
1314 load_perl (aTHX_ current);
1315 }
1316
1317 {
1318 unsigned int i;
1319
1320 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1321 SvREFCNT_dec (svf [i]);
1322
1323 SvREFCNT_dec (coro->saved_deffh);
1324 SvREFCNT_dec (coro->rouse_cb);
1325 SvREFCNT_dec (coro->invoke_cb);
1326 SvREFCNT_dec (coro->invoke_av);
1327 SvREFCNT_dec (coro->on_enter_xs);
1328 SvREFCNT_dec (coro->on_leave_xs);
1329 }
1330}
1331
1332ecb_inline void
1333free_coro_mortal (pTHX)
1334{
1335 if (ecb_expect_true (coro_mortal))
1336 {
1337 SvREFCNT_dec ((SV *)coro_mortal);
1338 coro_mortal = 0;
1339 }
1340}
1341
1342static int
1343runops_trace (pTHX)
1344{
1345 COP *oldcop = 0;
1346 int oldcxix = -2;
1347
1348 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1349 {
1350 PERL_ASYNC_CHECK ();
1351
1352 if (cctx_current->flags & CC_TRACE_ALL)
1353 {
1354 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1355 {
1356 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1357 SV **bot, **top;
1358 AV *av = newAV (); /* return values */
1359 SV **cb;
1360 dSP;
1361
1362 GV *gv = CvGV (cx->blk_sub.cv);
1363 SV *fullname = sv_2mortal (newSV (0));
1364 if (isGV (gv))
1365 gv_efullname3 (fullname, gv, 0);
1366
1367 bot = PL_stack_base + cx->blk_oldsp + 1;
1368 top = cx->blk_gimme == G_ARRAY ? SP + 1
1369 : cx->blk_gimme == G_SCALAR ? bot + 1
1370 : bot;
1371
1372 av_extend (av, top - bot);
1373 while (bot < top)
1374 av_push (av, SvREFCNT_inc_NN (*bot++));
1375
1376 PL_runops = RUNOPS_DEFAULT;
1377 ENTER;
1378 SAVETMPS;
1379 EXTEND (SP, 3);
1380 PUSHMARK (SP);
1381 PUSHs (&PL_sv_no);
1382 PUSHs (fullname);
1383 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1384 PUTBACK;
1385 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1386 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1387 SPAGAIN;
1388 FREETMPS;
1389 LEAVE;
1390 PL_runops = runops_trace;
1391 }
1392
1393 if (oldcop != PL_curcop)
1394 {
1395 oldcop = PL_curcop;
1396
1397 if (PL_curcop != &PL_compiling)
1398 {
1399 SV **cb;
1400
1401 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1402 {
1403 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1404
1405 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1406 {
1407 dSP;
1408 GV *gv = CvGV (cx->blk_sub.cv);
1409 SV *fullname = sv_2mortal (newSV (0));
1410
1411 if (isGV (gv))
1412 gv_efullname3 (fullname, gv, 0);
1413
1414 PL_runops = RUNOPS_DEFAULT;
1415 ENTER;
1416 SAVETMPS;
1417 EXTEND (SP, 3);
1418 PUSHMARK (SP);
1419 PUSHs (&PL_sv_yes);
1420 PUSHs (fullname);
1421 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc (SUB_ARGARRAY)) : &PL_sv_undef);
1422 PUTBACK;
1423 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1424 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1425 SPAGAIN;
1426 FREETMPS;
1427 LEAVE;
1428 PL_runops = runops_trace;
1429 }
1430
1431 oldcxix = cxstack_ix;
1432 }
1433
1434 if (cctx_current->flags & CC_TRACE_LINE)
1435 {
1436 dSP;
1437
1438 PL_runops = RUNOPS_DEFAULT;
1439 ENTER;
1440 SAVETMPS;
1441 EXTEND (SP, 3);
1442 PL_runops = RUNOPS_DEFAULT;
1443 PUSHMARK (SP);
1444 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1445 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1446 PUTBACK;
1447 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1448 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1449 SPAGAIN;
1450 FREETMPS;
1451 LEAVE;
1452 PL_runops = runops_trace;
1453 }
1454 }
1455 }
1456 }
1457 }
1458
1459 TAINT_NOT;
1460 return 0;
1461}
1462
1463static struct CoroSLF cctx_ssl_frame;
1464
1465static void
1466slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1467{
1468 ta->prev = 0;
1469}
1470
1471static int
1472slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1473{
1474 *frame = cctx_ssl_frame;
1475
1476 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1477}
1478
1479/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1480static void ecb_noinline
1481cctx_prepare (pTHX)
1482{
1483 PL_top_env = &PL_start_env;
1484
1485 if (cctx_current->flags & CC_TRACE)
1486 PL_runops = runops_trace;
1487
1488 /* we already must be executing an SLF op, there is no other valid way
1489 * that can lead to creation of a new cctx */
1490 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1491 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1492
1493 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1494 cctx_ssl_frame = slf_frame;
1495
1496 slf_frame.prepare = slf_prepare_set_stacklevel;
1497 slf_frame.check = slf_check_set_stacklevel;
1498}
1499
1500/* the tail of transfer: execute stuff we can only do after a transfer */
1501ecb_inline void
1502transfer_tail (pTHX)
1503{
1504 free_coro_mortal (aTHX);
1505}
1506
1507/* try to exit the same way perl's main function would do */
1508/* we do not bother resetting the environment or other things *7
1509/* that are not, uhm, essential */
1510/* this obviously also doesn't work when perl is embedded */
1511static void ecb_noinline ecb_cold
1512perlish_exit (pTHX)
1513{
1514 int exitstatus = perl_destruct (PL_curinterp);
1515 perl_free (PL_curinterp);
1516 exit (exitstatus);
1517}
1518
1519/*
1520 * this is a _very_ stripped down perl interpreter ;)
1521 */
1522static void
1523cctx_run (void *arg)
1524{
1525#ifdef USE_ITHREADS
1526# if CORO_PTHREAD
1527 PERL_SET_CONTEXT (coro_thx);
1528# endif
1529#endif
1530 {
1531 dTHX;
1532
1533 /* normally we would need to skip the entersub here */
1534 /* not doing so will re-execute it, which is exactly what we want */
1535 /* PL_nop = PL_nop->op_next */
1536
1537 /* inject a fake subroutine call to cctx_init */
1538 cctx_prepare (aTHX);
1539
1540 /* cctx_run is the alternative tail of transfer() */
1541 transfer_tail (aTHX);
1542
1543 /* somebody or something will hit me for both perl_run and PL_restartop */
1544 PL_restartop = PL_op;
1545 perl_run (PL_curinterp);
1546 /*
1547 * Unfortunately, there is no way to get at the return values of the
1548 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1549 * runtime errors here, as this is just a random interpreter, not a thread.
1550 */
1551
1552 /*
1553 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1554 * requires PL_scopestack_ix, so do it here if required.
1555 */
1556 if (!PL_scopestack_ix)
1557 ENTER;
1558
1559 /*
1560 * If perl-run returns we assume exit() was being called or the coro
1561 * fell off the end, which seems to be the only valid (non-bug)
1562 * reason for perl_run to return. We try to mimic whatever perl is normally
1563 * doing in that case. YMMV.
1564 */
1565 perlish_exit (aTHX);
1566 }
1567}
1568
1569static coro_cctx *
1570cctx_new (void)
1571{
1572 coro_cctx *cctx;
1573
1574 ++cctx_count;
1575 New (0, cctx, 1, coro_cctx);
1576
1577 cctx->gen = cctx_gen;
1578 cctx->flags = 0;
1579 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1580
1581 return cctx;
1582}
1583
1584/* create a new cctx only suitable as source */
1585static coro_cctx *
1586cctx_new_empty (void)
1587{
1588 coro_cctx *cctx = cctx_new ();
1589
1590 cctx->stack.sptr = 0;
1591 coro_create (&cctx->cctx, 0, 0, 0, 0);
1592
1593 return cctx;
1594}
1595
1596/* create a new cctx suitable as destination/running a perl interpreter */
1597static coro_cctx *
1598cctx_new_run (void)
1599{
1600 coro_cctx *cctx = cctx_new ();
1601
1602 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1603 {
1604 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1605 _exit (EXIT_FAILURE);
1606 }
1607
1608 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1609
1610 return cctx;
1611}
1612
1613static void
1614cctx_destroy (coro_cctx *cctx)
1615{
1616 if (!cctx)
1617 return;
1618
1619 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1620
1621 --cctx_count;
1622 coro_destroy (&cctx->cctx);
1623
1624 coro_stack_free (&cctx->stack);
1625
1626 Safefree (cctx);
1627}
1628
1629/* wether this cctx should be destructed */
1630#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1631
1632static coro_cctx *
1633cctx_get (pTHX)
1634{
1635 while (ecb_expect_true (cctx_first))
1636 {
1637 coro_cctx *cctx = cctx_first;
1638 cctx_first = cctx->next;
1639 --cctx_idle;
1640
1641 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1642 return cctx;
1643
1644 cctx_destroy (cctx);
1645 }
1646
1647 return cctx_new_run ();
1648}
1649
1650static void
1651cctx_put (coro_cctx *cctx)
1652{
1653 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1654
1655 /* free another cctx if overlimit */
1656 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1657 {
1658 coro_cctx *first = cctx_first;
1659 cctx_first = first->next;
1660 --cctx_idle;
1661
1662 cctx_destroy (first);
1663 }
1664
1665 ++cctx_idle;
1666 cctx->next = cctx_first;
1667 cctx_first = cctx;
1668}
1669
1670/** coroutine switching *****************************************************/
1671
1672static void
1673transfer_check (pTHX_ struct coro *prev, struct coro *next)
1674{
1675 /* TODO: throwing up here is considered harmful */
1676
1677 if (ecb_expect_true (prev != next))
1678 {
1679 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1680 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1681
1682 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1683 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1684
1685#if !PERL_VERSION_ATLEAST (5,10,0)
1686 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1687 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1688#endif
1689 }
1690}
1691
1692/* always use the TRANSFER macro */
1693static void ecb_noinline /* noinline so we have a fixed stackframe */
1694transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1695{
1696 dSTACKLEVEL;
1697
1698 /* sometimes transfer is only called to set idle_sp */
1699 if (ecb_expect_false (!prev))
1700 {
1701 cctx_current->idle_sp = STACKLEVEL;
1702 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1703 }
1704 else if (ecb_expect_true (prev != next))
1705 {
1706 coro_cctx *cctx_prev;
1707
1708 if (ecb_expect_false (prev->flags & CF_NEW))
1709 {
1710 /* create a new empty/source context */
1711 prev->flags &= ~CF_NEW;
1712 prev->flags |= CF_RUNNING;
1713 }
1714
1715 prev->flags &= ~CF_RUNNING;
1716 next->flags |= CF_RUNNING;
1717
1718 /* first get rid of the old state */
1719 save_perl (aTHX_ prev);
1720
1721 if (ecb_expect_false (next->flags & CF_NEW))
1722 {
1723 /* need to start coroutine */
1724 next->flags &= ~CF_NEW;
1725 /* setup coroutine call */
1726 init_perl (aTHX_ next);
1727 }
1728 else
1729 load_perl (aTHX_ next);
1730
1731 /* possibly untie and reuse the cctx */
1732 if (ecb_expect_true (
1733 cctx_current->idle_sp == STACKLEVEL
1734 && !(cctx_current->flags & CC_TRACE)
1735 && !force_cctx
1736 ))
1737 {
1738 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1739 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1740
1741 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1742 /* without this the next cctx_get might destroy the running cctx while still in use */
1743 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1744 if (ecb_expect_true (!next->cctx))
1745 next->cctx = cctx_get (aTHX);
1746
1747 cctx_put (cctx_current);
1748 }
1749 else
1750 prev->cctx = cctx_current;
1751
1752 ++next->usecount;
1753
1754 cctx_prev = cctx_current;
1755 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1756
1757 next->cctx = 0;
1758
1759 if (ecb_expect_false (cctx_prev != cctx_current))
1760 {
1761 cctx_prev->top_env = PL_top_env;
1762 PL_top_env = cctx_current->top_env;
1763 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1764 }
1765
1766 transfer_tail (aTHX);
1767 }
1768}
1769
1770#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1771#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1772
1773/** high level stuff ********************************************************/
1774
1775/* this function is actually Coro, not Coro::State, but we call it from here */
1776/* because it is convenient - but it hasn't been declared yet for that reason */
1777static void
1778coro_call_on_destroy (pTHX_ struct coro *coro);
1779
1780static void
1781coro_state_destroy (pTHX_ struct coro *coro)
1782{
1783 if (coro->flags & CF_ZOMBIE)
1784 return;
1785
1786 slf_destroy (aTHX_ coro);
1787
1788 coro->flags |= CF_ZOMBIE;
1789
1790 if (coro->flags & CF_READY)
1791 {
1792 /* reduce nready, as destroying a ready coro effectively unreadies it */
1793 /* alternative: look through all ready queues and remove the coro */
1794 --coro_nready;
1795 }
1796 else
1797 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1798
1799 if (coro->next) coro->next->prev = coro->prev;
1800 if (coro->prev) coro->prev->next = coro->next;
1801 if (coro == coro_first) coro_first = coro->next;
1802
1803 if (coro->mainstack
1804 && coro->mainstack != main_mainstack
1805 && coro->slot
1806 && !PL_dirty)
1807 destroy_perl (aTHX_ coro);
1808
1809 cctx_destroy (coro->cctx);
1810 SvREFCNT_dec (coro->startcv);
1811 SvREFCNT_dec (coro->args);
1812 SvREFCNT_dec (coro->swap_sv);
1813 SvREFCNT_dec (CORO_THROW);
1814
1815 coro_call_on_destroy (aTHX_ coro);
1816
1817 /* more destruction mayhem in coro_state_free */
1818}
1819
1820static int
1821coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1822{
1823 struct coro *coro = (struct coro *)mg->mg_ptr;
1824 mg->mg_ptr = 0;
1825
1826 coro_state_destroy (aTHX_ coro);
1827 SvREFCNT_dec (coro->on_destroy);
1828 SvREFCNT_dec (coro->status);
1829
1830 Safefree (coro);
1831
1832 return 0;
1833}
1834
1835static int ecb_cold
1836coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1837{
1838 /* called when perl clones the current process the slow way (windows process emulation) */
1839 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1840 mg->mg_ptr = 0;
1841 mg->mg_virtual = 0;
1842
1843 return 0;
1844}
1845
1846static MGVTBL coro_state_vtbl = {
1847 0, 0, 0, 0,
1848 coro_state_free,
1849 0,
1850#ifdef MGf_DUP
1851 coro_state_dup,
1852#else
1853# define MGf_DUP 0
1854#endif
1855};
1856
1857static void
1858prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1859{
1860 ta->prev = SvSTATE (prev_sv);
1861 ta->next = SvSTATE (next_sv);
1862 TRANSFER_CHECK (*ta);
1863}
1864
1865static void
1866api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1867{
1868 struct coro_transfer_args ta;
1869
1870 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1871 TRANSFER (ta, 1);
1872}
1873
1874/** Coro ********************************************************************/
1875
1876ecb_inline void
1877coro_enq (pTHX_ struct coro *coro)
1878{
1879 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1880
1881 SvREFCNT_inc_NN (coro->hv);
1882
1883 coro->next_ready = 0;
1884 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1885 ready [1] = coro;
1886}
1887
1888ecb_inline struct coro *
1889coro_deq (pTHX)
1890{
1891 int prio;
1892
1893 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1894 {
1895 struct coro **ready = coro_ready [prio];
1896
1897 if (ready [0])
1898 {
1899 struct coro *coro = ready [0];
1900 ready [0] = coro->next_ready;
1901 return coro;
1902 }
1903 }
1904
1905 return 0;
1906}
1907
1908static void
1909invoke_sv_ready_hook_helper (void)
1910{
1911 dTHX;
596 dSP; 1912 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 1913
600 coro_init_stacks (aTHX); 1914 ENTER;
601 /*PL_curcop = 0;*/ 1915 SAVETMPS;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 1916
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP); 1917 PUSHMARK (SP);
613 PUTBACK; 1918 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1919 call_sv (coro_readyhook, G_VOID | G_DISCARD);
615 1920
616 if (SvTRUE (ERRSV)) 1921 FREETMPS;
617 croak (NULL); 1922 LEAVE;
618 else 1923}
619 croak ("FATAL: CCTXT coroutine returned!"); 1924
1925static int
1926api_ready (pTHX_ SV *coro_sv)
1927{
1928 struct coro *coro = SvSTATE (coro_sv);
1929
1930 if (coro->flags & CF_READY)
1931 return 0;
1932
1933 coro->flags |= CF_READY;
1934
1935 coro_enq (aTHX_ coro);
1936
1937 if (!coro_nready++)
1938 if (coroapi.readyhook)
1939 coroapi.readyhook ();
1940
1941 return 1;
1942}
1943
1944static int
1945api_is_ready (pTHX_ SV *coro_sv)
1946{
1947 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1948}
1949
1950/* expects to own a reference to next->hv */
1951ecb_inline void
1952prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1953{
1954 SV *prev_sv = SvRV (coro_current);
1955
1956 ta->prev = SvSTATE_hv (prev_sv);
1957 ta->next = next;
1958
1959 TRANSFER_CHECK (*ta);
1960
1961 SvRV_set (coro_current, (SV *)next->hv);
1962
1963 free_coro_mortal (aTHX);
1964 coro_mortal = prev_sv;
1965}
1966
1967static void
1968prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1969{
1970 for (;;)
620 } 1971 {
621 else 1972 struct coro *next = coro_deq (aTHX);
622 {
623 UNOP myop;
624 1973
625 PL_op = (OP *)&myop; 1974 if (ecb_expect_true (next))
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 { 1975 {
682 SAVE (prev, flags); 1976 /* cannot transfer to destroyed coros, skip and look for next */
683 LOAD (next); 1977 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
684 1978 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
685 /* mark this state as in-use */ 1979 else
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 1980 {
692 if (!prev->stack) 1981 next->flags &= ~CF_READY;
693 allocate_stack (prev, 0); 1982 --coro_nready;
694 else if (prev->cursp != stacklevel 1983
695 && prev->stack->usecnt > 1) 1984 prepare_schedule_to (aTHX_ ta, next);
696 { 1985 break;
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 } 1986 }
714
715 } 1987 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 1988 else
719 { 1989 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1990 /* nothing to schedule: call the idle handler */
721 1991 if (SvROK (sv_idle)
722 if (flags & TRANSFER_SAVE_CCTXT) 1992 && SvOBJECT (SvRV (sv_idle)))
723 { 1993 {
724 if (!prev->stack) 1994 if (SvRV (sv_idle) == SvRV (coro_current))
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 { 1995 {
729 setup_coro (next); 1996 require_pv ("Carp");
730 1997
731 prev->stack->refcnt++; 1998 {
732 prev->stack->usecnt++; 1999 dSP;
733 next->stack = prev->stack; 2000
734 next->gencnt = prev->gencnt; 2001 ENTER;
2002 SAVETMPS;
2003
2004 PUSHMARK (SP);
2005 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2006 PUTBACK;
2007 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2008
2009 FREETMPS;
2010 LEAVE;
2011 }
735 } 2012 }
736 else 2013
737 { 2014 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
738 allocate_stack (next, 1); 2015 api_ready (aTHX_ SvRV (sv_idle));
739 coro_create (&(next->stack->cctx), 2016 --coro_nready;
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 } 2017 }
746 else 2018 else
747 setup_coro (next); 2019 {
2020 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2021 dSP;
2022
2023 ENTER;
2024 SAVETMPS;
2025
2026 PUSHMARK (SP);
2027 PUTBACK;
2028 call_sv (sv_idle, G_VOID | G_DISCARD);
2029
2030 FREETMPS;
2031 LEAVE;
2032 }
748 } 2033 }
2034 }
2035}
749 2036
750 /* 2037ecb_inline void
751 * xnext is now either prev or next, depending on wether 2038prepare_cede (pTHX_ struct coro_transfer_args *ta)
752 * we switched the c stack or not. that's why i use a global 2039{
753 * variable, that should become thread-specific at one point. 2040 api_ready (aTHX_ coro_current);
2041 prepare_schedule (aTHX_ ta);
2042}
2043
2044ecb_inline void
2045prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2046{
2047 SV *prev = SvRV (coro_current);
2048
2049 if (coro_nready)
2050 {
2051 prepare_schedule (aTHX_ ta);
2052 api_ready (aTHX_ prev);
2053 }
2054 else
2055 prepare_nop (aTHX_ ta);
2056}
2057
2058static void
2059api_schedule (pTHX)
2060{
2061 struct coro_transfer_args ta;
2062
2063 prepare_schedule (aTHX_ &ta);
2064 TRANSFER (ta, 1);
2065}
2066
2067static void
2068api_schedule_to (pTHX_ SV *coro_sv)
2069{
2070 struct coro_transfer_args ta;
2071 struct coro *next = SvSTATE (coro_sv);
2072
2073 SvREFCNT_inc_NN (coro_sv);
2074 prepare_schedule_to (aTHX_ &ta, next);
2075}
2076
2077static int
2078api_cede (pTHX)
2079{
2080 struct coro_transfer_args ta;
2081
2082 prepare_cede (aTHX_ &ta);
2083
2084 if (ecb_expect_true (ta.prev != ta.next))
2085 {
2086 TRANSFER (ta, 1);
2087 return 1;
2088 }
2089 else
2090 return 0;
2091}
2092
2093static int
2094api_cede_notself (pTHX)
2095{
2096 if (coro_nready)
2097 {
2098 struct coro_transfer_args ta;
2099
2100 prepare_cede_notself (aTHX_ &ta);
2101 TRANSFER (ta, 1);
2102 return 1;
2103 }
2104 else
2105 return 0;
2106}
2107
2108static void
2109api_trace (pTHX_ SV *coro_sv, int flags)
2110{
2111 struct coro *coro = SvSTATE (coro_sv);
2112
2113 if (coro->flags & CF_RUNNING)
2114 croak ("cannot enable tracing on a running coroutine, caught");
2115
2116 if (flags & CC_TRACE)
2117 {
2118 if (!coro->cctx)
2119 coro->cctx = cctx_new_run ();
2120 else if (!(coro->cctx->flags & CC_TRACE))
2121 croak ("cannot enable tracing on coroutine with custom stack, caught");
2122
2123 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2124 }
2125 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2126 {
2127 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2128
2129 if (coro->flags & CF_RUNNING)
2130 PL_runops = RUNOPS_DEFAULT;
2131 else
2132 coro->slot->runops = RUNOPS_DEFAULT;
2133 }
2134}
2135
2136static void
2137coro_push_av (pTHX_ AV *av, I32 gimme_v)
2138{
2139 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2140 {
2141 dSP;
2142
2143 if (gimme_v == G_SCALAR)
2144 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2145 else
2146 {
2147 int i;
2148 EXTEND (SP, AvFILLp (av) + 1);
2149
2150 for (i = 0; i <= AvFILLp (av); ++i)
2151 PUSHs (AvARRAY (av)[i]);
2152 }
2153
2154 PUTBACK;
2155 }
2156}
2157
2158static void
2159coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2160{
2161 if (!coro->on_destroy)
2162 coro->on_destroy = newAV ();
2163
2164 av_push (coro->on_destroy, cb);
2165}
2166
2167static void
2168slf_destroy_join (pTHX_ struct CoroSLF *frame)
2169{
2170 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2171}
2172
2173static int
2174slf_check_join (pTHX_ struct CoroSLF *frame)
2175{
2176 struct coro *coro = (struct coro *)frame->data;
2177
2178 if (!coro->status)
2179 return 1;
2180
2181 frame->destroy = 0;
2182
2183 coro_push_av (aTHX_ coro->status, GIMME_V);
2184
2185 SvREFCNT_dec ((SV *)coro->hv);
2186
2187 return 0;
2188}
2189
2190static void
2191slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2192{
2193 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2194
2195 if (items > 1)
2196 croak ("join called with too many arguments");
2197
2198 if (coro->status)
2199 frame->prepare = prepare_nop;
2200 else
2201 {
2202 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2203 frame->prepare = prepare_schedule;
2204 }
2205
2206 frame->check = slf_check_join;
2207 frame->destroy = slf_destroy_join;
2208 frame->data = (void *)coro;
2209 SvREFCNT_inc (coro->hv);
2210}
2211
2212static void
2213coro_call_on_destroy (pTHX_ struct coro *coro)
2214{
2215 AV *od = coro->on_destroy;
2216
2217 if (!od)
2218 return;
2219
2220 coro->on_destroy = 0;
2221 sv_2mortal ((SV *)od);
2222
2223 while (AvFILLp (od) >= 0)
2224 {
2225 SV *cb = sv_2mortal (av_pop (od));
2226
2227 /* coro hv's (and only hv's at the moment) are supported as well */
2228 if (SvSTATEhv_p (aTHX_ cb))
2229 api_ready (aTHX_ cb);
2230 else
2231 {
2232 dSP; /* don't disturb outer sp */
2233 PUSHMARK (SP);
2234
2235 if (coro->status)
2236 {
2237 PUTBACK;
2238 coro_push_av (aTHX_ coro->status, G_ARRAY);
2239 SPAGAIN;
2240 }
2241
2242 PUTBACK;
2243 call_sv (cb, G_VOID | G_DISCARD);
2244 }
2245 }
2246}
2247
2248static void
2249coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2250{
2251 AV *av;
2252
2253 if (coro->status)
2254 {
2255 av = coro->status;
2256 av_clear (av);
2257 }
2258 else
2259 av = coro->status = newAV ();
2260
2261 /* items are actually not so common, so optimise for this case */
2262 if (items)
2263 {
2264 int i;
2265
2266 av_extend (av, items - 1);
2267
2268 for (i = 0; i < items; ++i)
2269 av_push (av, SvREFCNT_inc_NN (arg [i]));
2270 }
2271}
2272
2273static void
2274slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2275{
2276 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2277 api_ready (aTHX_ sv_manager);
2278
2279 frame->prepare = prepare_schedule;
2280 frame->check = slf_check_repeat;
2281
2282 /* as a minor optimisation, we could unwind all stacks here */
2283 /* but that puts extra pressure on pp_slf, and is not worth much */
2284 /*coro_unwind_stacks (aTHX);*/
2285}
2286
2287static void
2288slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2289{
2290 HV *coro_hv = (HV *)SvRV (coro_current);
2291
2292 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2293 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2294}
2295
2296static void
2297slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 HV *coro_hv;
2300 struct coro *coro;
2301
2302 if (items <= 0)
2303 croak ("Coro::cancel called without coro object,");
2304
2305 coro = SvSTATE (arg [0]);
2306 coro_hv = coro->hv;
2307
2308 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2309
2310 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2311 {
2312 /* coro currently busy cancelling something, so just notify it */
2313 coro->slf_frame.data = (void *)coro;
2314
2315 frame->prepare = prepare_nop;
2316 frame->check = slf_check_nop;
2317 }
2318 else if (coro_hv == (HV *)SvRV (coro_current))
2319 {
2320 /* cancelling the current coro is allowed, and equals terminate */
2321 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2322 }
2323 else
2324 {
2325 struct coro *self = SvSTATE_current;
2326
2327 if (!self)
2328 croak ("Coro::cancel called outside of thread content,");
2329
2330 /* otherwise we cancel directly, purely for speed reasons
2331 * unfortunately, this requires some magic trickery, as
2332 * somebody else could cancel us, so we have to fight the cancellation.
2333 * this is ugly, and hopefully fully worth the extra speed.
2334 * besides, I can't get the slow-but-safe version working...
754 */ 2335 */
755 xnext->cursp = stacklevel; 2336 slf_frame.data = 0;
756 } 2337 self->flags |= CF_NOCANCEL;
757} 2338 coro_state_destroy (aTHX_ coro);
2339 self->flags &= ~CF_NOCANCEL;
758 2340
759static struct coro * 2341 if (slf_frame.data)
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789
790/** Coro ********************************************************************/
791
792#define PRIO_MAX 3
793#define PRIO_HIGH 1
794#define PRIO_NORMAL 0
795#define PRIO_LOW -1
796#define PRIO_IDLE -3
797#define PRIO_MIN -4
798
799/* for Coro.pm */
800static GV *coro_current, *coro_idle;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802static int coro_nready;
803
804static void
805coro_enq (SV *sv)
806{
807 if (SvROK (sv))
808 {
809 SV *hv = SvRV (sv);
810 if (SvTYPE (hv) == SVt_PVHV)
811 { 2342 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2343 /* while we were busy we have been cancelled, so terminate */
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2344 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2345 }
2346 else
2347 {
2348 frame->prepare = prepare_nop;
2349 frame->check = slf_check_nop;
2350 }
2351 }
2352}
814 2353
815 prio = prio > PRIO_MAX ? PRIO_MAX 2354static int
816 : prio < PRIO_MIN ? PRIO_MIN 2355slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
817 : prio; 2356{
2357 frame->prepare = 0;
2358 coro_unwind_stacks (aTHX);
818 2359
819 av_push (coro_ready [prio - PRIO_MIN], sv); 2360 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
820 coro_nready++;
821 2361
2362 return 1;
2363}
2364
2365static int
2366safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2367{
2368 if (coro->cctx)
2369 croak ("coro inside C callback, unable to cancel at this time, caught");
2370
2371 if (coro->flags & CF_NEW)
2372 {
2373 coro_set_status (aTHX_ coro, arg, items);
2374 coro_state_destroy (aTHX_ coro);
2375 }
2376 else
2377 {
2378 if (!coro->slf_frame.prepare)
2379 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2380
2381 slf_destroy (aTHX_ coro);
2382
2383 coro_set_status (aTHX_ coro, arg, items);
2384 coro->slf_frame.prepare = prepare_nop;
2385 coro->slf_frame.check = slf_check_safe_cancel;
2386
2387 api_ready (aTHX_ (SV *)coro->hv);
2388 }
2389
2390 return 1;
2391}
2392
2393/*****************************************************************************/
2394/* async pool handler */
2395
2396static int
2397slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2398{
2399 HV *hv = (HV *)SvRV (coro_current);
2400 struct coro *coro = (struct coro *)frame->data;
2401
2402 if (!coro->invoke_cb)
2403 return 1; /* loop till we have invoke */
2404 else
2405 {
2406 hv_store (hv, "desc", sizeof ("desc") - 1,
2407 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2408
2409 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2410
2411 {
2412 dSP;
2413 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2414 PUTBACK;
2415 }
2416
2417 SvREFCNT_dec (GvAV (PL_defgv));
2418 GvAV (PL_defgv) = coro->invoke_av;
2419 coro->invoke_av = 0;
2420
2421 return 0;
2422 }
2423}
2424
2425static void
2426slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2427{
2428 HV *hv = (HV *)SvRV (coro_current);
2429 struct coro *coro = SvSTATE_hv ((SV *)hv);
2430
2431 if (ecb_expect_true (coro->saved_deffh))
2432 {
2433 /* subsequent iteration */
2434 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2435 coro->saved_deffh = 0;
2436
2437 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2438 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2439 {
2440 slf_init_terminate_cancel_common (aTHX_ frame, hv);
822 return; 2441 return;
823 } 2442 }
2443 else
2444 {
2445 av_clear (GvAV (PL_defgv));
2446 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2447
2448 if (ecb_expect_false (coro->swap_sv))
2449 {
2450 SWAP_SVS_LEAVE (coro);
2451 SvREFCNT_dec_NN (coro->swap_sv);
2452 coro->swap_sv = 0;
2453 }
2454
2455 coro->prio = 0;
2456
2457 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2458 api_trace (aTHX_ coro_current, 0);
2459
2460 frame->prepare = prepare_schedule;
2461 av_push (av_async_pool, SvREFCNT_inc (hv));
2462 }
2463 }
2464 else
824 } 2465 {
2466 /* first iteration, simply fall through */
2467 frame->prepare = prepare_nop;
2468 }
825 2469
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2470 frame->check = slf_check_pool_handler;
2471 frame->data = (void *)coro;
2472}
2473
2474/*****************************************************************************/
2475/* rouse callback */
2476
2477#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2478
2479static void
2480coro_rouse_callback (pTHX_ CV *cv)
2481{
2482 dXSARGS;
2483 SV *data = (SV *)S_GENSUB_ARG;
2484
2485 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2486 {
2487 /* first call, set args */
2488 SV *coro = SvRV (data);
2489 AV *av = newAV ();
2490
2491 SvRV_set (data, (SV *)av);
2492
2493 /* better take a full copy of the arguments */
2494 while (items--)
2495 av_store (av, items, newSVsv (ST (items)));
2496
2497 api_ready (aTHX_ coro);
2498 SvREFCNT_dec (coro);
2499 }
2500
2501 XSRETURN_EMPTY;
2502}
2503
2504static int
2505slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2506{
2507 SV *data = (SV *)frame->data;
2508
2509 if (CORO_THROW)
2510 return 0;
2511
2512 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2513 return 1;
2514
2515 /* now push all results on the stack */
2516 {
2517 dSP;
2518 AV *av = (AV *)SvRV (data);
2519 int i;
2520
2521 EXTEND (SP, AvFILLp (av) + 1);
2522 for (i = 0; i <= AvFILLp (av); ++i)
2523 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2524
2525 /* we have stolen the elements, so set length to zero and free */
2526 AvFILLp (av) = -1;
2527 av_undef (av);
2528
2529 PUTBACK;
2530 }
2531
2532 return 0;
2533}
2534
2535static void
2536slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2537{
2538 SV *cb;
2539
2540 if (items)
2541 cb = arg [0];
2542 else
2543 {
2544 struct coro *coro = SvSTATE_current;
2545
2546 if (!coro->rouse_cb)
2547 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2548
2549 cb = sv_2mortal (coro->rouse_cb);
2550 coro->rouse_cb = 0;
2551 }
2552
2553 if (!SvROK (cb)
2554 || SvTYPE (SvRV (cb)) != SVt_PVCV
2555 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2556 croak ("Coro::rouse_wait called with illegal callback argument,");
2557
2558 {
2559 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2560 SV *data = (SV *)S_GENSUB_ARG;
2561
2562 frame->data = (void *)data;
2563 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2564 frame->check = slf_check_rouse_wait;
2565 }
827} 2566}
828 2567
829static SV * 2568static SV *
830coro_deq (int min_prio) 2569coro_new_rouse_cb (pTHX)
831{ 2570{
832 int prio = PRIO_MAX - PRIO_MIN; 2571 HV *hv = (HV *)SvRV (coro_current);
2572 struct coro *coro = SvSTATE_hv (hv);
2573 SV *data = newRV_inc ((SV *)hv);
2574 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
833 2575
834 min_prio -= PRIO_MIN; 2576 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
835 if (min_prio < 0) 2577 SvREFCNT_dec (data); /* magicext increases the refcount */
836 min_prio = 0;
837 2578
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2579 SvREFCNT_dec (coro->rouse_cb);
839 if (av_len (coro_ready[prio]) >= 0) 2580 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2581
2582 return cb;
2583}
2584
2585/*****************************************************************************/
2586/* schedule-like-function opcode (SLF) */
2587
2588static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2589static const CV *slf_cv;
2590static SV **slf_argv;
2591static int slf_argc, slf_arga; /* count, allocated */
2592static I32 slf_ax; /* top of stack, for restore */
2593
2594/* this restores the stack in the case we patched the entersub, to */
2595/* recreate the stack frame as perl will on following calls */
2596/* since entersub cleared the stack */
2597static OP *
2598pp_restore (pTHX)
2599{
2600 int i;
2601 SV **SP = PL_stack_base + slf_ax;
2602
2603 PUSHMARK (SP);
2604
2605 EXTEND (SP, slf_argc + 1);
2606
2607 for (i = 0; i < slf_argc; ++i)
2608 PUSHs (sv_2mortal (slf_argv [i]));
2609
2610 PUSHs ((SV *)CvGV (slf_cv));
2611
2612 RETURNOP (slf_restore.op_first);
2613}
2614
2615static void
2616slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2617{
2618 SV **arg = (SV **)slf_frame.data;
2619
2620 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2621}
2622
2623static void
2624slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2625{
2626 if (items != 2)
2627 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2628
2629 frame->prepare = slf_prepare_transfer;
2630 frame->check = slf_check_nop;
2631 frame->data = (void *)arg; /* let's hope it will stay valid */
2632}
2633
2634static void
2635slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2636{
2637 frame->prepare = prepare_schedule;
2638 frame->check = slf_check_nop;
2639}
2640
2641static void
2642slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2643{
2644 struct coro *next = (struct coro *)slf_frame.data;
2645
2646 SvREFCNT_inc_NN (next->hv);
2647 prepare_schedule_to (aTHX_ ta, next);
2648}
2649
2650static void
2651slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2652{
2653 if (!items)
2654 croak ("Coro::schedule_to expects a coroutine argument, caught");
2655
2656 frame->data = (void *)SvSTATE (arg [0]);
2657 frame->prepare = slf_prepare_schedule_to;
2658 frame->check = slf_check_nop;
2659}
2660
2661static void
2662slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2663{
2664 api_ready (aTHX_ SvRV (coro_current));
2665
2666 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2667}
2668
2669static void
2670slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2671{
2672 frame->prepare = prepare_cede;
2673 frame->check = slf_check_nop;
2674}
2675
2676static void
2677slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2678{
2679 frame->prepare = prepare_cede_notself;
2680 frame->check = slf_check_nop;
2681}
2682
2683/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2684static void
2685slf_destroy (pTHX_ struct coro *coro)
2686{
2687 struct CoroSLF frame = coro->slf_frame;
2688
2689 /*
2690 * The on_destroy below most likely is from an SLF call.
2691 * Since by definition the SLF call will not finish when we destroy
2692 * the coro, we will have to force-finish it here, otherwise
2693 * cleanup functions cannot call SLF functions.
2694 */
2695 coro->slf_frame.prepare = 0;
2696
2697 /* this callback is reserved for slf functions needing to do cleanup */
2698 if (frame.destroy && frame.prepare && !PL_dirty)
2699 frame.destroy (aTHX_ &frame);
2700}
2701
2702/*
2703 * these not obviously related functions are all rolled into one
2704 * function to increase chances that they all will call transfer with the same
2705 * stack offset
2706 * SLF stands for "schedule-like-function".
2707 */
2708static OP *
2709pp_slf (pTHX)
2710{
2711 I32 checkmark; /* mark SP to see how many elements check has pushed */
2712
2713 /* set up the slf frame, unless it has already been set-up */
2714 /* the latter happens when a new coro has been started */
2715 /* or when a new cctx was attached to an existing coroutine */
2716 if (ecb_expect_true (!slf_frame.prepare))
2717 {
2718 /* first iteration */
2719 dSP;
2720 SV **arg = PL_stack_base + TOPMARK + 1;
2721 int items = SP - arg; /* args without function object */
2722 SV *gv = *sp;
2723
2724 /* do a quick consistency check on the "function" object, and if it isn't */
2725 /* for us, divert to the real entersub */
2726 if (SvTYPE (gv) != SVt_PVGV
2727 || !GvCV (gv)
2728 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2729 return PL_ppaddr[OP_ENTERSUB](aTHX);
2730
2731 if (!(PL_op->op_flags & OPf_STACKED))
2732 {
2733 /* ampersand-form of call, use @_ instead of stack */
2734 AV *av = GvAV (PL_defgv);
2735 arg = AvARRAY (av);
2736 items = AvFILLp (av) + 1;
2737 }
2738
2739 /* now call the init function, which needs to set up slf_frame */
2740 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2741 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2742
2743 /* pop args */
2744 SP = PL_stack_base + POPMARK;
2745
2746 PUTBACK;
2747 }
2748
2749 /* now that we have a slf_frame, interpret it! */
2750 /* we use a callback system not to make the code needlessly */
2751 /* complicated, but so we can run multiple perl coros from one cctx */
2752
2753 do
2754 {
2755 struct coro_transfer_args ta;
2756
2757 slf_frame.prepare (aTHX_ &ta);
2758 TRANSFER (ta, 0);
2759
2760 checkmark = PL_stack_sp - PL_stack_base;
2761 }
2762 while (slf_frame.check (aTHX_ &slf_frame));
2763
2764 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2765
2766 /* exception handling */
2767 if (ecb_expect_false (CORO_THROW))
2768 {
2769 SV *exception = sv_2mortal (CORO_THROW);
2770
2771 CORO_THROW = 0;
2772 sv_setsv (ERRSV, exception);
2773 croak (0);
2774 }
2775
2776 /* return value handling - mostly like entersub */
2777 /* make sure we put something on the stack in scalar context */
2778 if (GIMME_V == G_SCALAR
2779 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2780 {
2781 dSP;
2782 SV **bot = PL_stack_base + checkmark;
2783
2784 if (sp == bot) /* too few, push undef */
2785 bot [1] = &PL_sv_undef;
2786 else /* too many, take last one */
2787 bot [1] = *sp;
2788
2789 SP = bot + 1;
2790
2791 PUTBACK;
2792 }
2793
2794 return NORMAL;
2795}
2796
2797static void
2798api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2799{
2800 int i;
2801 SV **arg = PL_stack_base + ax;
2802 int items = PL_stack_sp - arg + 1;
2803
2804 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2805
2806 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2807 && PL_op->op_ppaddr != pp_slf)
2808 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2809
2810 CvFLAGS (cv) |= CVf_SLF;
2811 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2812 slf_cv = cv;
2813
2814 /* we patch the op, and then re-run the whole call */
2815 /* we have to put the same argument on the stack for this to work */
2816 /* and this will be done by pp_restore */
2817 slf_restore.op_next = (OP *)&slf_restore;
2818 slf_restore.op_type = OP_CUSTOM;
2819 slf_restore.op_ppaddr = pp_restore;
2820 slf_restore.op_first = PL_op;
2821
2822 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2823
2824 if (PL_op->op_flags & OPf_STACKED)
2825 {
2826 if (items > slf_arga)
2827 {
2828 slf_arga = items;
2829 Safefree (slf_argv);
2830 New (0, slf_argv, slf_arga, SV *);
2831 }
2832
2833 slf_argc = items;
2834
2835 for (i = 0; i < items; ++i)
2836 slf_argv [i] = SvREFCNT_inc (arg [i]);
2837 }
2838 else
2839 slf_argc = 0;
2840
2841 PL_op->op_ppaddr = pp_slf;
2842 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2843
2844 PL_op = (OP *)&slf_restore;
2845}
2846
2847/*****************************************************************************/
2848/* dynamic wind */
2849
2850static void
2851on_enterleave_call (pTHX_ SV *cb)
2852{
2853 dSP;
2854
2855 PUSHSTACK;
2856
2857 PUSHMARK (SP);
2858 PUTBACK;
2859 call_sv (cb, G_VOID | G_DISCARD);
2860 SPAGAIN;
2861
2862 POPSTACK;
2863}
2864
2865static SV *
2866coro_avp_pop_and_free (pTHX_ AV **avp)
2867{
2868 AV *av = *avp;
2869 SV *res = av_pop (av);
2870
2871 if (AvFILLp (av) < 0)
2872 {
2873 *avp = 0;
2874 SvREFCNT_dec (av);
2875 }
2876
2877 return res;
2878}
2879
2880static void
2881coro_pop_on_enter (pTHX_ void *coro)
2882{
2883 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2884 SvREFCNT_dec (cb);
2885}
2886
2887static void
2888coro_pop_on_leave (pTHX_ void *coro)
2889{
2890 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2891 on_enterleave_call (aTHX_ sv_2mortal (cb));
2892}
2893
2894static void
2895enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2896{
2897 if (!hook)
2898 return;
2899
2900 if (!*avp)
2901 {
2902 *avp = newAV ();
2903 AvREAL_off (*avp);
2904 }
2905
2906 av_push (*avp, (SV *)hook);
2907 av_push (*avp, (SV *)arg);
2908}
2909
2910static void
2911enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2912{
2913 AV *av = *avp;
2914 int i;
2915
2916 if (!av)
2917 return;
2918
2919 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2920 if (AvARRAY (av)[i] == (SV *)hook)
840 { 2921 {
841 coro_nready--; 2922 if (execute)
842 return av_shift (coro_ready[prio]); 2923 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2924
2925 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2926 av_pop (av);
2927 av_pop (av);
2928 break;
843 } 2929 }
844 2930
2931 if (AvFILLp (av) >= 0)
2932 {
2933 *avp = 0;
2934 SvREFCNT_dec_NN (av);
2935 }
2936}
2937
2938static void
2939api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2940{
2941 struct coro *coro = SvSTATE (coro_sv);
2942
2943 if (SvSTATE_current == coro)
2944 if (enter)
2945 enter (aTHX_ enter_arg);
2946
2947 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2948 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2949}
2950
2951static void
2952api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2953{
2954 struct coro *coro = SvSTATE (coro_sv);
2955
2956 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2957 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2958}
2959
2960static void
2961savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2962{
2963 struct coro *coro = SvSTATE_current;
2964
2965 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2966}
2967
2968static void
2969savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2970{
2971 struct coro *coro = SvSTATE_current;
2972
2973 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2974}
2975
2976static void
2977api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2978{
2979 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2980
2981 /* this ought to be much cheaper than malloc + a single destructor call */
2982 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2983 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2984}
2985
2986/*****************************************************************************/
2987/* PerlIO::cede */
2988
2989typedef struct
2990{
2991 PerlIOBuf base;
2992 NV next, every;
2993} PerlIOCede;
2994
2995static IV ecb_cold
2996PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2997{
2998 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2999
3000 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
3001 self->next = nvtime () + self->every;
3002
3003 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
3004}
3005
3006static SV * ecb_cold
3007PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3008{
3009 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3010
3011 return newSVnv (self->every);
3012}
3013
3014static IV
3015PerlIOCede_flush (pTHX_ PerlIO *f)
3016{
3017 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3018 double now = nvtime ();
3019
3020 if (now >= self->next)
3021 {
3022 api_cede (aTHX);
3023 self->next = now + self->every;
3024 }
3025
3026 return PerlIOBuf_flush (aTHX_ f);
3027}
3028
3029static PerlIO_funcs PerlIO_cede =
3030{
3031 sizeof(PerlIO_funcs),
3032 "cede",
3033 sizeof(PerlIOCede),
3034 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3035 PerlIOCede_pushed,
3036 PerlIOBuf_popped,
3037 PerlIOBuf_open,
3038 PerlIOBase_binmode,
3039 PerlIOCede_getarg,
3040 PerlIOBase_fileno,
3041 PerlIOBuf_dup,
3042 PerlIOBuf_read,
3043 PerlIOBuf_unread,
3044 PerlIOBuf_write,
3045 PerlIOBuf_seek,
3046 PerlIOBuf_tell,
3047 PerlIOBuf_close,
3048 PerlIOCede_flush,
3049 PerlIOBuf_fill,
3050 PerlIOBase_eof,
3051 PerlIOBase_error,
3052 PerlIOBase_clearerr,
3053 PerlIOBase_setlinebuf,
3054 PerlIOBuf_get_base,
3055 PerlIOBuf_bufsiz,
3056 PerlIOBuf_get_ptr,
3057 PerlIOBuf_get_cnt,
3058 PerlIOBuf_set_ptrcnt,
3059};
3060
3061/*****************************************************************************/
3062/* Coro::Semaphore & Coro::Signal */
3063
3064static SV *
3065coro_waitarray_new (pTHX_ int count)
3066{
3067 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3068 AV *av = newAV ();
3069 SV **ary;
3070
3071 /* unfortunately, building manually saves memory */
3072 Newx (ary, 2, SV *);
3073 AvALLOC (av) = ary;
3074#if PERL_VERSION_ATLEAST (5,10,0)
3075 AvARRAY (av) = ary;
3076#else
3077 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3078 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3079 SvPVX ((SV *)av) = (char *)ary;
3080#endif
3081 AvMAX (av) = 1;
3082 AvFILLp (av) = 0;
3083 ary [0] = newSViv (count);
3084
3085 return newRV_noinc ((SV *)av);
3086}
3087
3088/* semaphore */
3089
3090static void
3091coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3092{
3093 SV *count_sv = AvARRAY (av)[0];
3094 IV count = SvIVX (count_sv);
3095
3096 count += adjust;
3097 SvIVX (count_sv) = count;
3098
3099 /* now wake up as many waiters as are expected to lock */
3100 while (count > 0 && AvFILLp (av) > 0)
3101 {
3102 SV *cb;
3103
3104 /* swap first two elements so we can shift a waiter */
3105 AvARRAY (av)[0] = AvARRAY (av)[1];
3106 AvARRAY (av)[1] = count_sv;
3107 cb = av_shift (av);
3108
3109 if (SvOBJECT (cb))
3110 {
3111 api_ready (aTHX_ cb);
3112 --count;
3113 }
3114 else if (SvTYPE (cb) == SVt_PVCV)
3115 {
3116 dSP;
3117 PUSHMARK (SP);
3118 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3119 PUTBACK;
3120 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3121 }
3122
3123 SvREFCNT_dec_NN (cb);
3124 }
3125}
3126
3127static void
3128coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3129{
3130 /* call $sem->adjust (0) to possibly wake up some other waiters */
3131 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3132}
3133
3134static int
3135slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3136{
3137 AV *av = (AV *)frame->data;
3138 SV *count_sv = AvARRAY (av)[0];
3139 SV *coro_hv = SvRV (coro_current);
3140
3141 frame->destroy = 0;
3142
3143 /* if we are about to throw, don't actually acquire the lock, just throw */
3144 if (ecb_expect_false (CORO_THROW))
3145 {
3146 /* we still might be responsible for the semaphore, so wake up others */
3147 coro_semaphore_adjust (aTHX_ av, 0);
3148
3149 return 0;
3150 }
3151 else if (SvIVX (count_sv) > 0)
3152 {
3153 if (acquire)
3154 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3155 else
3156 coro_semaphore_adjust (aTHX_ av, 0);
3157
3158 return 0;
3159 }
3160 else
3161 {
3162 int i;
3163 /* if we were woken up but can't down, we look through the whole */
3164 /* waiters list and only add us if we aren't in there already */
3165 /* this avoids some degenerate memory usage cases */
3166 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3167 if (AvARRAY (av)[i] == coro_hv)
3168 return 1;
3169
3170 av_push (av, SvREFCNT_inc (coro_hv));
3171 return 1;
3172 }
3173}
3174
3175static int
3176slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3177{
3178 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3179}
3180
3181static int
3182slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3183{
3184 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3185}
3186
3187static void
3188slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3189{
3190 AV *av = (AV *)SvRV (arg [0]);
3191
3192 if (SvIVX (AvARRAY (av)[0]) > 0)
3193 {
3194 frame->data = (void *)av;
3195 frame->prepare = prepare_nop;
3196 }
3197 else
3198 {
3199 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3200
3201 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3202 frame->prepare = prepare_schedule;
3203 /* to avoid race conditions when a woken-up coro gets terminated */
3204 /* we arrange for a temporary on_destroy that calls adjust (0) */
3205 frame->destroy = coro_semaphore_destroy;
3206 }
3207}
3208
3209static void
3210slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3211{
3212 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3213 frame->check = slf_check_semaphore_down;
3214}
3215
3216static void
3217slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3218{
3219 if (items >= 2)
3220 {
3221 /* callback form */
3222 AV *av = (AV *)SvRV (arg [0]);
3223 SV *cb_cv = s_get_cv_croak (arg [1]);
3224
3225 av_push (av, SvREFCNT_inc_NN (cb_cv));
3226
3227 if (SvIVX (AvARRAY (av)[0]) > 0)
3228 coro_semaphore_adjust (aTHX_ av, 0);
3229
3230 frame->prepare = prepare_nop;
3231 frame->check = slf_check_nop;
3232 }
3233 else
3234 {
3235 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3236 frame->check = slf_check_semaphore_wait;
3237 }
3238}
3239
3240/* signal */
3241
3242static void
3243coro_signal_wake (pTHX_ AV *av, int count)
3244{
3245 SvIVX (AvARRAY (av)[0]) = 0;
3246
3247 /* now signal count waiters */
3248 while (count > 0 && AvFILLp (av) > 0)
3249 {
3250 SV *cb;
3251
3252 /* swap first two elements so we can shift a waiter */
3253 cb = AvARRAY (av)[0];
3254 AvARRAY (av)[0] = AvARRAY (av)[1];
3255 AvARRAY (av)[1] = cb;
3256
3257 cb = av_shift (av);
3258
3259 if (SvTYPE (cb) == SVt_PVCV)
3260 {
3261 dSP;
3262 PUSHMARK (SP);
3263 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3264 PUTBACK;
3265 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3266 }
3267 else
3268 {
3269 api_ready (aTHX_ cb);
3270 sv_setiv (cb, 0); /* signal waiter */
3271 }
3272
3273 SvREFCNT_dec_NN (cb);
3274
3275 --count;
3276 }
3277}
3278
3279static int
3280slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3281{
3282 /* if we are about to throw, also stop waiting */
3283 return SvROK ((SV *)frame->data) && !CORO_THROW;
3284}
3285
3286static void
3287slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3288{
3289 AV *av = (AV *)SvRV (arg [0]);
3290
3291 if (items >= 2)
3292 {
3293 SV *cb_cv = s_get_cv_croak (arg [1]);
3294 av_push (av, SvREFCNT_inc_NN (cb_cv));
3295
3296 if (SvIVX (AvARRAY (av)[0]))
3297 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3298
3299 frame->prepare = prepare_nop;
3300 frame->check = slf_check_nop;
3301 }
3302 else if (SvIVX (AvARRAY (av)[0]))
3303 {
3304 SvIVX (AvARRAY (av)[0]) = 0;
3305 frame->prepare = prepare_nop;
3306 frame->check = slf_check_nop;
3307 }
3308 else
3309 {
3310 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3311
3312 av_push (av, waiter);
3313
3314 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3315 frame->prepare = prepare_schedule;
3316 frame->check = slf_check_signal_wait;
3317 }
3318}
3319
3320/*****************************************************************************/
3321/* Coro::AIO */
3322
3323#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3324
3325/* helper storage struct */
3326struct io_state
3327{
3328 int errorno;
3329 I32 laststype; /* U16 in 5.10.0 */
3330 int laststatval;
3331 Stat_t statcache;
3332};
3333
3334static void
3335coro_aio_callback (pTHX_ CV *cv)
3336{
3337 dXSARGS;
3338 AV *state = (AV *)S_GENSUB_ARG;
3339 SV *coro = av_pop (state);
3340 SV *data_sv = newSV (sizeof (struct io_state));
3341
3342 av_extend (state, items - 1);
3343
3344 sv_upgrade (data_sv, SVt_PV);
3345 SvCUR_set (data_sv, sizeof (struct io_state));
3346 SvPOK_only (data_sv);
3347
3348 {
3349 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3350
3351 data->errorno = errno;
3352 data->laststype = PL_laststype;
3353 data->laststatval = PL_laststatval;
3354 data->statcache = PL_statcache;
3355 }
3356
3357 /* now build the result vector out of all the parameters and the data_sv */
3358 {
3359 int i;
3360
3361 for (i = 0; i < items; ++i)
3362 av_push (state, SvREFCNT_inc_NN (ST (i)));
3363 }
3364
3365 av_push (state, data_sv);
3366
3367 api_ready (aTHX_ coro);
3368 SvREFCNT_dec_NN (coro);
3369 SvREFCNT_dec_NN ((AV *)state);
3370}
3371
3372static int
3373slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3374{
3375 AV *state = (AV *)frame->data;
3376
3377 /* if we are about to throw, return early */
3378 /* this does not cancel the aio request, but at least */
3379 /* it quickly returns */
3380 if (CORO_THROW)
3381 return 0;
3382
3383 /* one element that is an RV? repeat! */
3384 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3385 return 1;
3386
3387 /* restore status */
3388 {
3389 SV *data_sv = av_pop (state);
3390 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3391
3392 errno = data->errorno;
3393 PL_laststype = data->laststype;
3394 PL_laststatval = data->laststatval;
3395 PL_statcache = data->statcache;
3396
3397 SvREFCNT_dec_NN (data_sv);
3398 }
3399
3400 /* push result values */
3401 {
3402 dSP;
3403 int i;
3404
3405 EXTEND (SP, AvFILLp (state) + 1);
3406 for (i = 0; i <= AvFILLp (state); ++i)
3407 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3408
3409 PUTBACK;
3410 }
3411
845 return 0; 3412 return 0;
846} 3413}
847 3414
848static void 3415static void
849api_ready (SV *coro) 3416slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
850{ 3417{
851 coro_enq (SvREFCNT_inc (coro)); 3418 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
852} 3419 SV *coro_hv = SvRV (coro_current);
3420 struct coro *coro = SvSTATE_hv (coro_hv);
853 3421
854static void 3422 /* put our coroutine id on the state arg */
855api_schedule (int cede) 3423 av_push (state, SvREFCNT_inc_NN (coro_hv));
856{
857 SV *prev, *next;
858 3424
859 prev = GvSV (coro_current); 3425 /* first see whether we have a non-zero priority and set it as AIO prio */
3426 if (coro->prio)
3427 {
3428 dSP;
860 3429
861 if (cede) 3430 static SV *prio_cv;
862 coro_enq (SvREFCNT_inc (prev)); 3431 static SV *prio_sv;
863 3432
864 next = coro_deq (PRIO_MIN); 3433 if (ecb_expect_false (!prio_cv))
3434 {
3435 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3436 prio_sv = newSViv (0);
3437 }
865 3438
866 if (!next) 3439 PUSHMARK (SP);
867 next = SvREFCNT_inc (GvSV (coro_idle)); 3440 sv_setiv (prio_sv, coro->prio);
3441 XPUSHs (prio_sv);
868 3442
869 GvSV (coro_current) = SvREFCNT_inc (next); 3443 PUTBACK;
870 transfer (aTHX_ 3444 call_sv (prio_cv, G_VOID | G_DISCARD);
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3445 }
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
876}
877 3446
3447 /* now call the original request */
3448 {
3449 dSP;
3450 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3451 int i;
3452
3453 PUSHMARK (SP);
3454
3455 /* first push all args to the stack */
3456 EXTEND (SP, items + 1);
3457
3458 for (i = 0; i < items; ++i)
3459 PUSHs (arg [i]);
3460
3461 /* now push the callback closure */
3462 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3463
3464 /* now call the AIO function - we assume our request is uncancelable */
3465 PUTBACK;
3466 call_sv ((SV *)req, G_VOID | G_DISCARD);
3467 }
3468
3469 /* now that the request is going, we loop till we have a result */
3470 frame->data = (void *)state;
3471 frame->prepare = prepare_schedule;
3472 frame->check = slf_check_aio_req;
3473}
3474
3475static void
3476coro_aio_req_xs (pTHX_ CV *cv)
3477{
3478 dXSARGS;
3479
3480 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3481
3482 XSRETURN_EMPTY;
3483}
3484
3485/*****************************************************************************/
3486
3487#if CORO_CLONE
3488# include "clone.c"
3489#endif
3490
3491/*****************************************************************************/
3492
3493static SV *
3494coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3495{
3496 SV *coro_sv;
3497 struct coro *coro;
3498 MAGIC *mg;
3499 HV *hv;
3500 SV *cb;
3501 int i;
3502
3503 if (argc > 0)
3504 {
3505 cb = s_get_cv_croak (argv [0]);
3506
3507 if (!is_coro)
3508 {
3509 if (CvISXSUB (cb))
3510 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3511
3512 if (!CvROOT (cb))
3513 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3514 }
3515 }
3516
3517 Newz (0, coro, 1, struct coro);
3518 coro->args = newAV ();
3519 coro->flags = CF_NEW;
3520
3521 if (coro_first) coro_first->prev = coro;
3522 coro->next = coro_first;
3523 coro_first = coro;
3524
3525 coro->hv = hv = newHV ();
3526 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3527 mg->mg_flags |= MGf_DUP;
3528 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3529
3530 if (argc > 0)
3531 {
3532 av_extend (coro->args, argc + is_coro - 1);
3533
3534 if (is_coro)
3535 {
3536 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3537 cb = (SV *)cv_coro_run;
3538 }
3539
3540 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3541
3542 for (i = 1; i < argc; i++)
3543 av_push (coro->args, newSVsv (argv [i]));
3544 }
3545
3546 return coro_sv;
3547}
3548
3549#ifndef __cplusplus
3550ecb_cold XS(boot_Coro__State);
3551#endif
3552
3553#if CORO_JIT
3554
3555static void ecb_noinline ecb_cold
3556pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3557{
3558 dSP;
3559 AV *av = newAV ();
3560
3561 av_store (av, 3, newSVuv (d));
3562 av_store (av, 2, newSVuv (c));
3563 av_store (av, 1, newSVuv (b));
3564 av_store (av, 0, newSVuv (a));
3565
3566 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3567
3568 PUTBACK;
3569}
3570
3571static void ecb_noinline ecb_cold
3572jit_init (pTHX)
3573{
3574 dSP;
3575 SV *load, *save;
3576 char *map_base;
3577 char *load_ptr, *save_ptr;
3578 STRLEN load_len, save_len, map_len;
3579 int count;
3580
3581 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3582
3583 PUSHMARK (SP);
3584 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3585 #include "state.h"
3586 count = call_pv ("Coro::State::_jit", G_ARRAY);
3587 SPAGAIN;
3588
3589 save = POPs; save_ptr = SvPVbyte (save, save_len);
3590 load = POPs; load_ptr = SvPVbyte (load, load_len);
3591
3592 map_len = load_len + save_len + 16;
3593
3594 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3595
3596 if (map_base == (char *)MAP_FAILED)
3597 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3598
3599 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3600
3601 load_perl_slots = (load_save_perl_slots_type)map_base;
3602 memcpy (map_base, load_ptr, load_len);
3603
3604 map_base += (load_len + 15) & ~15;
3605
3606 save_perl_slots = (load_save_perl_slots_type)map_base;
3607 memcpy (map_base, save_ptr, save_len);
3608
3609 /* we are good citizens and try to make the page read-only, so the evil evil */
3610 /* hackers might have it a bit more difficult */
3611 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3612
3613 PUTBACK;
3614 eval_pv ("undef &Coro::State::_jit", 1);
3615}
3616
3617#endif
3618
878MODULE = Coro::State PACKAGE = Coro::State 3619MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 3620
880PROTOTYPES: ENABLE 3621PROTOTYPES: DISABLE
881 3622
882BOOT: 3623BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 3624{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3625#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3626#include "state.h"
3627#ifdef USE_ITHREADS
3628# if CORO_PTHREAD
3629 coro_thx = PERL_GET_CONTEXT;
3630# endif
3631#endif
3632 /* perl defines these to check for existance first, but why it doesn't */
3633 /* just create them one at init time is not clear to me, except for */
3634 /* programs trying to delete them, but... */
3635 /* anyway, we declare this as invalid and make sure they are initialised here */
3636 DEFSV;
3637 ERRSV;
3638
3639 cctx_current = cctx_new_empty ();
3640
3641 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3642 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3643
3644 {
3645 /*
3646 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3647 * by coro_sig_vtbl in hash values.
3648 */
3649 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3650
3651 /* this only works if perl doesn't have a vtbl for %SIG */
3652 assert (!mg->mg_virtual);
3653
3654 /*
3655 * The irony is that the perl API itself asserts that mg_virtual
3656 * must be non-const, yet perl5porters insisted on marking their
3657 * vtbls as read-only, just to thwart perl modules from patching
3658 * them.
3659 */
3660 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3661 mg->mg_flags |= MGf_COPY;
3662
3663 coro_sigelem_vtbl = PL_vtbl_sigelem;
3664 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3665 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3666 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3667 }
3668
3669 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3670 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3671
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3672 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 3673
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3674 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3675 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3676 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3677 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 3678
896 main_mainstack = PL_mainstack; 3679 main_mainstack = PL_mainstack;
3680 main_top_env = PL_top_env;
897 3681
3682 while (main_top_env->je_prev)
3683 main_top_env = main_top_env->je_prev;
3684
3685 {
3686 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3687
3688 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3689 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3690
3691 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3692 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3693 }
3694
898 coroapi.ver = CORO_API_VERSION; 3695 coroapi.ver = CORO_API_VERSION;
3696 coroapi.rev = CORO_API_REVISION;
3697
899 coroapi.transfer = api_transfer; 3698 coroapi.transfer = api_transfer;
900}
901 3699
902Coro::State 3700 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 3701 coroapi.execute_slf = api_execute_slf;
904 SV * args 3702 coroapi.prepare_nop = prepare_nop;
3703 coroapi.prepare_schedule = prepare_schedule;
3704 coroapi.prepare_cede = prepare_cede;
3705 coroapi.prepare_cede_notself = prepare_cede_notself;
3706
3707 time_init (aTHX);
3708
3709 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3710#if CORO_JIT
3711 PUTBACK;
3712 jit_init (aTHX);
3713 SPAGAIN;
3714#endif
3715}
3716
3717SV *
3718new (SV *klass, ...)
3719 ALIAS:
3720 Coro::new = 1
3721 CODE:
3722 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3723 OUTPUT:
3724 RETVAL
3725
3726void
3727transfer (...)
3728 PROTOTYPE: $$
3729 CODE:
3730 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3731
3732SV *
3733clone (Coro::State coro)
3734 CODE:
3735{
3736#if CORO_CLONE
3737 struct coro *ncoro = coro_clone (aTHX_ coro);
3738 MAGIC *mg;
3739 /* TODO: too much duplication */
3740 ncoro->hv = newHV ();
3741 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3742 mg->mg_flags |= MGf_DUP;
3743 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3744#else
3745 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3746#endif
3747}
3748 OUTPUT:
3749 RETVAL
3750
3751int
3752cctx_stacksize (int new_stacksize = 0)
3753 PROTOTYPE: ;$
3754 CODE:
3755 RETVAL = cctx_stacksize;
3756 if (new_stacksize)
3757 {
3758 cctx_stacksize = new_stacksize;
3759 ++cctx_gen;
3760 }
3761 OUTPUT:
3762 RETVAL
3763
3764int
3765cctx_max_idle (int max_idle = 0)
3766 PROTOTYPE: ;$
3767 CODE:
3768 RETVAL = cctx_max_idle;
3769 if (max_idle > 1)
3770 cctx_max_idle = max_idle;
3771 OUTPUT:
3772 RETVAL
3773
3774int
3775cctx_count ()
3776 PROTOTYPE:
3777 CODE:
3778 RETVAL = cctx_count;
3779 OUTPUT:
3780 RETVAL
3781
3782int
3783cctx_idle ()
3784 PROTOTYPE:
3785 CODE:
3786 RETVAL = cctx_idle;
3787 OUTPUT:
3788 RETVAL
3789
3790void
3791list ()
3792 PROTOTYPE:
3793 PPCODE:
3794{
3795 struct coro *coro;
3796 for (coro = coro_first; coro; coro = coro->next)
3797 if (coro->hv)
3798 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3799}
3800
3801void
3802call (Coro::State coro, SV *coderef)
3803 ALIAS:
3804 eval = 1
3805 CODE:
3806{
3807 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3808 {
3809 struct coro *current = SvSTATE_current;
3810 struct CoroSLF slf_save;
3811
3812 if (current != coro)
3813 {
3814 PUTBACK;
3815 save_perl (aTHX_ current);
3816 load_perl (aTHX_ coro);
3817 /* the coro is most likely in an active SLF call.
3818 * while not strictly required (the code we execute is
3819 * not allowed to call any SLF functions), it's cleaner
3820 * to reinitialise the slf_frame and restore it later.
3821 * This might one day allow us to actually do SLF calls
3822 * from code executed here.
3823 */
3824 slf_save = slf_frame;
3825 slf_frame.prepare = 0;
3826 SPAGAIN;
3827 }
3828
3829 PUSHSTACK;
3830
3831 PUSHMARK (SP);
3832 PUTBACK;
3833
3834 if (ix)
3835 eval_sv (coderef, 0);
3836 else
3837 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3838
3839 POPSTACK;
3840 SPAGAIN;
3841
3842 if (current != coro)
3843 {
3844 PUTBACK;
3845 slf_frame = slf_save;
3846 save_perl (aTHX_ coro);
3847 load_perl (aTHX_ current);
3848 SPAGAIN;
3849 }
3850 }
3851}
3852
3853SV *
3854is_ready (Coro::State coro)
905 PROTOTYPE: $ 3855 PROTOTYPE: $
3856 ALIAS:
3857 is_ready = CF_READY
3858 is_running = CF_RUNNING
3859 is_new = CF_NEW
3860 is_destroyed = CF_ZOMBIE
3861 is_zombie = CF_ZOMBIE
3862 is_suspended = CF_SUSPENDED
3863 CODE:
3864 RETVAL = boolSV (coro->flags & ix);
3865 OUTPUT:
3866 RETVAL
3867
3868void
3869throw (SV *self, SV *exception = &PL_sv_undef)
3870 PROTOTYPE: $;$
906 CODE: 3871 CODE:
907 Coro__State coro; 3872{
3873 struct coro *coro = SvSTATE (self);
3874 struct coro *current = SvSTATE_current;
3875 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3876 SvREFCNT_dec (*exceptionp);
3877 SvGETMAGIC (exception);
3878 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
908 3879
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3880 api_ready (aTHX_ self);
910 croak ("Coro::State::_newprocess expects an arrayref"); 3881}
3882
3883void
3884api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3885 PROTOTYPE: $;$
3886 C_ARGS: aTHX_ coro, flags
3887
3888SV *
3889has_cctx (Coro::State coro)
3890 PROTOTYPE: $
3891 CODE:
3892 /* maybe manage the running flag differently */
3893 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3894 OUTPUT:
3895 RETVAL
3896
3897int
3898is_traced (Coro::State coro)
3899 PROTOTYPE: $
3900 CODE:
3901 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3902 OUTPUT:
3903 RETVAL
3904
3905UV
3906rss (Coro::State coro)
3907 PROTOTYPE: $
3908 ALIAS:
3909 usecount = 1
3910 CODE:
3911 switch (ix)
3912 {
3913 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3914 case 1: RETVAL = coro->usecount; break;
911 3915 }
912 New (0, coro, 1, struct coro); 3916 OUTPUT:
913
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
915 coro->mainstack = 0; /* actual work is done inside transfer */
916 coro->stack = 0;
917
918 RETVAL = coro; 3917 RETVAL
3918
3919void
3920force_cctx ()
3921 PROTOTYPE:
3922 CODE:
3923 cctx_current->idle_sp = 0;
3924
3925void
3926swap_defsv (Coro::State self)
3927 PROTOTYPE: $
3928 ALIAS:
3929 swap_defav = 1
3930 CODE:
3931 if (!self->slot)
3932 croak ("cannot swap state with coroutine that has no saved state,");
3933 else
3934 {
3935 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3936 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3937
3938 SV *tmp = *src; *src = *dst; *dst = tmp;
3939 }
3940
3941void
3942cancel (Coro::State self)
3943 CODE:
3944 coro_state_destroy (aTHX_ self);
3945
3946SV *
3947enable_times (int enabled = enable_times)
3948 CODE:
3949{
3950 RETVAL = boolSV (enable_times);
3951
3952 if (enabled != enable_times)
3953 {
3954 enable_times = enabled;
3955
3956 coro_times_update ();
3957 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3958 }
3959}
919 OUTPUT: 3960 OUTPUT:
920 RETVAL 3961 RETVAL
921 3962
922void 3963void
923transfer(prev, next, flags) 3964times (Coro::State self)
924 Coro::State_or_hashref prev 3965 PPCODE:
925 Coro::State_or_hashref next 3966{
926 int flags 3967 struct coro *current = SvSTATE (coro_current);
927 PROTOTYPE: @ 3968
3969 if (ecb_expect_false (current == self))
3970 {
3971 coro_times_update ();
3972 coro_times_add (SvSTATE (coro_current));
3973 }
3974
3975 EXTEND (SP, 2);
3976 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3977 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3978
3979 if (ecb_expect_false (current == self))
3980 coro_times_sub (SvSTATE (coro_current));
3981}
3982
3983void
3984swap_sv (Coro::State coro, SV *sva, SV *svb)
3985 CODE:
3986{
3987 struct coro *current = SvSTATE_current;
3988 AV *swap_sv;
3989 int i;
3990
3991 sva = SvRV (sva);
3992 svb = SvRV (svb);
3993
3994 if (current == coro)
3995 SWAP_SVS_LEAVE (current);
3996
3997 if (!coro->swap_sv)
3998 coro->swap_sv = newAV ();
3999
4000 swap_sv = coro->swap_sv;
4001
4002 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4003 {
4004 SV *a = AvARRAY (swap_sv)[i ];
4005 SV *b = AvARRAY (swap_sv)[i + 1];
4006
4007 if (a == sva && b == svb)
4008 {
4009 SvREFCNT_dec_NN (a);
4010 SvREFCNT_dec_NN (b);
4011
4012 for (; i <= AvFILLp (swap_sv) - 2; i++)
4013 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4014
4015 AvFILLp (swap_sv) -= 2;
4016
4017 goto removed;
4018 }
4019 }
4020
4021 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4022 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4023
4024 removed:
4025
4026 if (current == coro)
4027 SWAP_SVS_ENTER (current);
4028}
4029
4030
4031MODULE = Coro::State PACKAGE = Coro
4032
4033BOOT:
4034{
4035 if (SVt_LAST > 32)
4036 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
4037
4038 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4039 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4040 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4041 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4042 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4043 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4044 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4045 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4046
4047 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4048 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4049 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4050 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4051
4052 coro_stash = gv_stashpv ("Coro", TRUE);
4053
4054 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4055 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4056 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4057 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4058 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4059 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4060
4061 {
4062 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4063
4064 coroapi.schedule = api_schedule;
4065 coroapi.schedule_to = api_schedule_to;
4066 coroapi.cede = api_cede;
4067 coroapi.cede_notself = api_cede_notself;
4068 coroapi.ready = api_ready;
4069 coroapi.is_ready = api_is_ready;
4070 coroapi.nready = coro_nready;
4071 coroapi.current = coro_current;
4072
4073 coroapi.enterleave_hook = api_enterleave_hook;
4074 coroapi.enterleave_unhook = api_enterleave_unhook;
4075 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4076
4077 /*GCoroAPI = &coroapi;*/
4078 sv_setiv (sv, (IV)&coroapi);
4079 SvREADONLY_on (sv);
4080 }
4081}
4082
4083SV *
4084async (...)
4085 PROTOTYPE: &@
928 CODE: 4086 CODE:
929 PUTBACK; 4087 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
930 transfer (aTHX_ prev, next, flags); 4088 api_ready (aTHX_ RETVAL);
931 SPAGAIN; 4089 OUTPUT:
4090 RETVAL
932 4091
933void 4092void
934DESTROY(coro) 4093_destroy (Coro::State coro)
935 Coro::State coro 4094 CODE:
936 CODE: 4095 /* used by the manager thread */
937 4096 coro_state_destroy (aTHX_ coro);
938 if (coro->mainstack && coro->mainstack != main_mainstack)
939 {
940 struct coro temp;
941
942 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944 LOAD(aTHX_ coro);
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958 4097
959void 4098void
960flush() 4099on_destroy (Coro::State coro, SV *cb)
961 CODE: 4100 CODE:
962#ifdef MAY_FLUSH 4101 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
963 flush_padlist_cache ();
964#endif
965 4102
966void 4103void
967_exit(code) 4104join (...)
968 int code 4105 CODE:
4106 CORO_EXECUTE_SLF_XS (slf_init_join);
4107
4108void
4109terminate (...)
4110 CODE:
4111 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4112
4113void
4114cancel (...)
4115 CODE:
4116 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4117
4118int
4119safe_cancel (Coro::State self, ...)
4120 C_ARGS: aTHX_ self, &ST (1), items - 1
4121
4122void
4123schedule (...)
4124 CODE:
4125 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4126
4127void
4128schedule_to (...)
4129 CODE:
4130 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4131
4132void
4133cede_to (...)
4134 CODE:
4135 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4136
4137void
4138cede (...)
4139 CODE:
4140 CORO_EXECUTE_SLF_XS (slf_init_cede);
4141
4142void
4143cede_notself (...)
4144 CODE:
4145 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4146
4147void
4148_set_current (SV *current)
969 PROTOTYPE: $ 4149 PROTOTYPE: $
970 CODE: 4150 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 4151 SvREFCNT_dec_NN (SvRV (coro_current));
972 _exit (code); 4152 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
973#else
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978
979MODULE = Coro::State PACKAGE = Coro::Cont
980
981# this is slightly dirty (should expose a c-level api)
982 4153
983void 4154void
984yield(...) 4155_set_readyhook (SV *hook)
985 PROTOTYPE: @ 4156 PROTOTYPE: $
986 CODE: 4157 CODE:
987 static SV *returnstk;
988 SV *sv;
989 AV *defav = GvAV (PL_defgv);
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv); 4158 SvREFCNT_dec (coro_readyhook);
1006 4159 SvGETMAGIC (hook);
1007 transfer(aTHX_ prev, next, 0); 4160 if (SvOK (hook))
1008 4161 {
1009MODULE = Coro::State PACKAGE = Coro
1010
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT:
1014{
1015 int i;
1016 HV *stash = gv_stashpv ("Coro", TRUE);
1017
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 4162 coro_readyhook = newSVsv (hook);
1030 4163 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1031 {
1032 SV *sv = perl_get_sv("Coro::API", 1);
1033
1034 coroapi.schedule = api_schedule;
1035 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current;
1038
1039 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi);
1041 SvREADONLY_on(sv);
1042 } 4164 }
1043} 4165 else
4166 {
4167 coro_readyhook = 0;
4168 CORO_READYHOOK = 0;
4169 }
1044 4170
1045void 4171int
4172prio (Coro::State coro, int newprio = 0)
4173 PROTOTYPE: $;$
4174 ALIAS:
4175 nice = 1
4176 CODE:
4177{
4178 RETVAL = coro->prio;
4179
4180 if (items > 1)
4181 {
4182 if (ix)
4183 newprio = coro->prio - newprio;
4184
4185 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4186 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4187
4188 coro->prio = newprio;
4189 }
4190}
4191 OUTPUT:
4192 RETVAL
4193
4194SV *
1046ready(self) 4195ready (SV *self)
1047 SV * self 4196 PROTOTYPE: $
1048 CODE: 4197 CODE:
1049 api_ready (self); 4198 RETVAL = boolSV (api_ready (aTHX_ self));
4199 OUTPUT:
4200 RETVAL
1050 4201
1051int 4202int
1052nready(...) 4203nready (...)
1053 PROTOTYPE: 4204 PROTOTYPE:
1054 CODE: 4205 CODE:
1055 RETVAL = coro_nready; 4206 RETVAL = coro_nready;
1056 OUTPUT: 4207 OUTPUT:
1057 RETVAL 4208 RETVAL
1058 4209
1059void 4210void
1060schedule(...) 4211suspend (Coro::State self)
1061 PROTOTYPE: 4212 PROTOTYPE: $
1062 ALIAS:
1063 cede = 1
1064 CODE: 4213 CODE:
1065 api_schedule (ix); 4214 self->flags |= CF_SUSPENDED;
1066 4215
4216void
4217resume (Coro::State self)
4218 PROTOTYPE: $
4219 CODE:
4220 self->flags &= ~CF_SUSPENDED;
4221
4222void
4223_pool_handler (...)
4224 CODE:
4225 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4226
4227void
4228async_pool (SV *cv, ...)
4229 PROTOTYPE: &@
4230 PPCODE:
4231{
4232 HV *hv = (HV *)av_pop (av_async_pool);
4233 AV *av = newAV ();
4234 SV *cb = ST (0);
4235 int i;
4236
4237 av_extend (av, items - 2);
4238 for (i = 1; i < items; ++i)
4239 av_push (av, SvREFCNT_inc_NN (ST (i)));
4240
4241 if ((SV *)hv == &PL_sv_undef)
4242 {
4243 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4244 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4245 SvREFCNT_dec_NN (sv);
4246 }
4247
4248 {
4249 struct coro *coro = SvSTATE_hv (hv);
4250
4251 assert (!coro->invoke_cb);
4252 assert (!coro->invoke_av);
4253 coro->invoke_cb = SvREFCNT_inc (cb);
4254 coro->invoke_av = av;
4255 }
4256
4257 api_ready (aTHX_ (SV *)hv);
4258
4259 if (GIMME_V != G_VOID)
4260 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4261 else
4262 SvREFCNT_dec_NN (hv);
4263}
4264
4265SV *
4266rouse_cb ()
4267 PROTOTYPE:
4268 CODE:
4269 RETVAL = coro_new_rouse_cb (aTHX);
4270 OUTPUT:
4271 RETVAL
4272
4273void
4274rouse_wait (...)
4275 PROTOTYPE: ;$
4276 PPCODE:
4277 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4278
4279void
4280on_enter (SV *block)
4281 ALIAS:
4282 on_leave = 1
4283 PROTOTYPE: &
4284 CODE:
4285{
4286 struct coro *coro = SvSTATE_current;
4287 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4288
4289 block = s_get_cv_croak (block);
4290
4291 if (!*avp)
4292 *avp = newAV ();
4293
4294 av_push (*avp, SvREFCNT_inc (block));
4295
4296 if (!ix)
4297 on_enterleave_call (aTHX_ block);
4298
4299 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4300 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4301 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4302}
4303
4304
4305MODULE = Coro::State PACKAGE = PerlIO::cede
4306
4307BOOT:
4308 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4309
4310
4311MODULE = Coro::State PACKAGE = Coro::Semaphore
4312
4313SV *
4314new (SV *klass, SV *count = 0)
4315 CODE:
4316{
4317 int semcnt = 1;
4318
4319 if (count)
4320 {
4321 SvGETMAGIC (count);
4322
4323 if (SvOK (count))
4324 semcnt = SvIV (count);
4325 }
4326
4327 RETVAL = sv_bless (
4328 coro_waitarray_new (aTHX_ semcnt),
4329 GvSTASH (CvGV (cv))
4330 );
4331}
4332 OUTPUT:
4333 RETVAL
4334
4335# helper for Coro::Channel and others
4336SV *
4337_alloc (int count)
4338 CODE:
4339 RETVAL = coro_waitarray_new (aTHX_ count);
4340 OUTPUT:
4341 RETVAL
4342
4343SV *
4344count (SV *self)
4345 CODE:
4346 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4347 OUTPUT:
4348 RETVAL
4349
4350void
4351up (SV *self)
4352 CODE:
4353 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4354
4355void
4356adjust (SV *self, int adjust)
4357 CODE:
4358 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4359
4360void
4361down (...)
4362 CODE:
4363 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4364
4365void
4366wait (...)
4367 CODE:
4368 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4369
4370void
4371try (SV *self)
4372 PPCODE:
4373{
4374 AV *av = (AV *)SvRV (self);
4375 SV *count_sv = AvARRAY (av)[0];
4376 IV count = SvIVX (count_sv);
4377
4378 if (count > 0)
4379 {
4380 --count;
4381 SvIVX (count_sv) = count;
4382 XSRETURN_YES;
4383 }
4384 else
4385 XSRETURN_NO;
4386}
4387
4388void
4389waiters (SV *self)
4390 PPCODE:
4391{
4392 AV *av = (AV *)SvRV (self);
4393 int wcount = AvFILLp (av) + 1 - 1;
4394
4395 if (GIMME_V == G_SCALAR)
4396 XPUSHs (sv_2mortal (newSViv (wcount)));
4397 else
4398 {
4399 int i;
4400 EXTEND (SP, wcount);
4401 for (i = 1; i <= wcount; ++i)
4402 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4403 }
4404}
4405
4406MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4407
4408void
4409_may_delete (SV *sem, int count, unsigned int extra_refs)
4410 PPCODE:
4411{
4412 AV *av = (AV *)SvRV (sem);
4413
4414 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4415 && AvFILLp (av) == 0 /* no waiters, just count */
4416 && SvIV (AvARRAY (av)[0]) == count)
4417 XSRETURN_YES;
4418
4419 XSRETURN_NO;
4420}
4421
4422MODULE = Coro::State PACKAGE = Coro::Signal
4423
4424SV *
4425new (SV *klass)
4426 CODE:
4427 RETVAL = sv_bless (
4428 coro_waitarray_new (aTHX_ 0),
4429 GvSTASH (CvGV (cv))
4430 );
4431 OUTPUT:
4432 RETVAL
4433
4434void
4435wait (...)
4436 CODE:
4437 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4438
4439void
4440broadcast (SV *self)
4441 CODE:
4442{
4443 AV *av = (AV *)SvRV (self);
4444 coro_signal_wake (aTHX_ av, AvFILLp (av));
4445}
4446
4447void
4448send (SV *self)
4449 CODE:
4450{
4451 AV *av = (AV *)SvRV (self);
4452
4453 if (AvFILLp (av))
4454 coro_signal_wake (aTHX_ av, 1);
4455 else
4456 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4457}
4458
4459IV
4460awaited (SV *self)
4461 CODE:
4462 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4463 OUTPUT:
4464 RETVAL
4465
4466
4467MODULE = Coro::State PACKAGE = Coro::AnyEvent
4468
4469BOOT:
4470 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4471
4472void
4473_schedule (...)
4474 CODE:
4475{
4476 static int incede;
4477
4478 api_cede_notself (aTHX);
4479
4480 ++incede;
4481 while (coro_nready >= incede && api_cede (aTHX))
4482 ;
4483
4484 sv_setsv (sv_activity, &PL_sv_undef);
4485 if (coro_nready >= incede)
4486 {
4487 PUSHMARK (SP);
4488 PUTBACK;
4489 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4490 }
4491
4492 --incede;
4493}
4494
4495
4496MODULE = Coro::State PACKAGE = Coro::AIO
4497
4498void
4499_register (char *target, char *proto, SV *req)
4500 CODE:
4501{
4502 SV *req_cv = s_get_cv_croak (req);
4503 /* newXSproto doesn't return the CV on 5.8 */
4504 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4505 sv_setpv ((SV *)slf_cv, proto);
4506 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4507}
4508
4509MODULE = Coro::State PACKAGE = Coro::Select
4510
4511void
4512patch_pp_sselect ()
4513 CODE:
4514 if (!coro_old_pp_sselect)
4515 {
4516 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4517 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4518 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4519 }
4520
4521void
4522unpatch_pp_sselect ()
4523 CODE:
4524 if (coro_old_pp_sselect)
4525 {
4526 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4527 coro_old_pp_sselect = 0;
4528 }
4529
4530MODULE = Coro::State PACKAGE = Coro::Util
4531
4532void
4533_exit (int code)
4534 CODE:
4535 _exit (code);
4536
4537NV
4538time ()
4539 CODE:
4540 RETVAL = nvtime (aTHX);
4541 OUTPUT:
4542 RETVAL
4543
4544NV
4545gettimeofday ()
4546 PPCODE:
4547{
4548 UV tv [2];
4549 u2time (aTHX_ tv);
4550 EXTEND (SP, 2);
4551 PUSHs (sv_2mortal (newSVuv (tv [0])));
4552 PUSHs (sv_2mortal (newSVuv (tv [1])));
4553}
4554

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