ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC vs.
Revision 1.443 by root, Thu Mar 6 06:40:32 2014 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_ANONYMOUS 25#include <assert.h>
13# ifdef MAP_ANON 26
14# define MAP_ANONYMOUS MAP_ANON 27#ifndef SVs_PADSTALE
15# else 28# define SVs_PADSTALE 0
16# undef HAVE_MMAP
17# endif 29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
18# endif 39# endif
40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
41# define PadlistMAX(pl) AvFILLp (pl)
42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
43# define PadARRAY AvARRAY
44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
19#endif 46#endif
20 47
21#define MAY_FLUSH /* increases codesize and is rarely used */ 48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
22 53
23#define SUB_INIT "Coro::State::initialize" 54#if defined(_WIN32)
24#define UCORO_STATE "_coro_state" 55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
60#else
61# include <inttypes.h> /* most portable stdint.h */
62#endif
25 63
26/* The next macro should declare a variable stacklevel that contains and approximation 64/* 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 65static int cctx_max_idle = 4;
28 * and should be unique. */ 66
67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
68# define HAS_SCOPESTACK_NAME 1
69#endif
70
71/* prefer perl internal functions over our own? */
72#ifndef CORO_PREFER_PERL_FUNCTIONS
73# define CORO_PREFER_PERL_FUNCTIONS 0
74#endif
75
76/* The next macros try to return the current stack pointer, in an as
77 * portable way as possible. */
78#if __GNUC__ >= 4
79# define dSTACKLEVEL int stacklevel_dummy
80# define STACKLEVEL __builtin_frame_address (0)
81#else
82# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 83# define STACKLEVEL ((void *)&stacklevel)
84#endif
30 85
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 86#define IN_DESTRUCT PL_dirty
32
33#define labs(l) ((l) >= 0 ? (l) : -(l))
34 87
35#include "CoroAPI.h" 88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
36 90
91#ifdef USE_ITHREADS
92# if CORO_PTHREAD
93static void *coro_thx;
94# endif
95#endif
96
97#ifdef __linux
98# include <time.h> /* for timespec */
99# include <syscall.h> /* for SYS_* */
100# ifdef SYS_clock_gettime
101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
102# define CORO_CLOCK_MONOTONIC 1
103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
104# endif
105#endif
106
107static double (*nvtime)(); /* so why doesn't it take void? */
108static void (*u2time)(pTHX_ UV ret[2]);
109
110/* we hijack an hopefully unused CV flag for our purposes */
111#define CVf_SLF 0x4000
112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
114
115static U32 cctx_gen;
116static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
118static AV *main_mainstack; /* used to differentiate between $main and others */
119static JMPENV *main_top_env;
120static HV *coro_state_stash, *coro_stash;
121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 122
39/* this is actually not only the c stack but also c registers etc... */ 123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
126
127static GV *irsgv; /* $/ */
128static GV *stdoutgv; /* *STDOUT */
129static SV *rv_diehook;
130static SV *rv_warnhook;
131static HV *hv_sig; /* %SIG */
132
133/* async_pool helper stuff */
134static SV *sv_pool_rss;
135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
149
150static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle;
152
153enum
154{
155 CC_MAPPED = 0x01,
156 CC_NOREUSE = 0x02, /* throw this away after tracing */
157 CC_TRACE = 0x04,
158 CC_TRACE_SUB = 0x08, /* trace sub calls */
159 CC_TRACE_LINE = 0x10, /* trace each statement */
160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
161};
162
163/* this is a structure representing a c-level coroutine */
40typedef struct { 164typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 165{
42 int usecnt; /* shared by how many coroutines */ 166 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 167
168 /* the stack */
169 struct coro_stack stack;
170
171 /* cpu state */
172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
176 JMPENV *top_env;
45 coro_context cctx; 177 coro_context cctx;
46 178
47 void *sptr; 179 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 180#if CORO_USE_VALGRIND
49} coro_stack; 181 int valgrind_id;
182#endif
183 unsigned char flags;
184} coro_cctx;
50 185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
192enum
193{
194 CF_RUNNING = 0x0001, /* coroutine is running */
195 CF_READY = 0x0002, /* coroutine is ready */
196 CF_NEW = 0x0004, /* has never been switched to */
197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200};
201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct
204{
205 #define VARx(name,expr,type) type name;
206 #include "state.h"
207} perl_slots;
208
209/* how many context stack entries do we need for perl_slots */
210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
211
212/* this is a structure representing a perl-level coroutine */
51struct coro { 213struct coro
52 /* the optional C context */ 214{
53 coro_stack *stack; 215 /* the C coroutine allocated to this perl coroutine, if any */
54 void *cursp; 216 coro_cctx *cctx;
55 int gencnt;
56 217
57 /* optionally saved, might be zero */ 218 /* ready queue */
58 AV *defav; 219 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61 /* TODO: PL_pmop might be nice && effortless to save. */
62
63 /* saved global state not related to stacks */
64 U8 dowarn;
65 I32 in_eval;
66 220
67 /* the stacks and related info (callchain etc..) */ 221 /* state data */
68 PERL_SI *curstackinfo; 222 struct CoroSLF slf_frame; /* saved slf frame */
69 AV *curstack;
70 AV *mainstack; 223 AV *mainstack;
71 SV **stack_sp; 224 perl_slots *slot; /* basically the saved sp */
72 OP *op;
73 SV **curpad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV *top_env;
94 225
226 CV *startcv; /* the CV to execute */
95 /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
96 AV *args; 228 int flags; /* CF_ flags */
229 HV *hv; /* the perl hash associated with this coro, if any */
230
231 /* statistics */
232 int usecount; /* number of transfers to this coro */
233
234 /* coro process data */
235 int prio;
236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
240
241 /* async_pool */
242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
255
256 /* linked list */
257 struct coro *next, *prev;
97}; 258};
98 259
99typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
101 262
102static AV *main_mainstack; /* used to differentiate between $main and others */ 263/* the following variables are effectively part of the perl context */
103static HV *coro_state_stash; 264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
267
268/** Coro ********************************************************************/
269
270#define CORO_PRIO_MAX 3
271#define CORO_PRIO_HIGH 1
272#define CORO_PRIO_NORMAL 0
273#define CORO_PRIO_LOW -1
274#define CORO_PRIO_IDLE -3
275#define CORO_PRIO_MIN -4
276
277/* for Coro.pm */
278static SV *coro_current;
279static SV *coro_readyhook;
280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
282static struct coro *coro_first;
283#define coro_nready coroapi.nready
284
285/** JIT *********************************************************************/
286
287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
104static SV *ucoro_state_sv; 311static SV *coro_select_select;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107 312
108/* mostly copied from op.c:cv_clone2 */ 313/* horrible hack, but if it works... */
109STATIC AV * 314static OP *
110clone_padlist (AV *protopadlist) 315coro_pp_sselect (pTHX)
111{ 316{
112 AV *av; 317 dSP;
113 I32 ix; 318 PUSHMARK (SP - 4); /* fake argument list */
114 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 319 XPUSHs (coro_select_select);
115 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 320 PUTBACK;
116 SV **pname = AvARRAY (protopad_name); 321
117 SV **ppad = AvARRAY (protopad); 322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
118 I32 fname = AvFILLp (protopad_name); 323 PL_op->op_flags |= OPf_STACKED;
119 I32 fpad = AvFILLp (protopad); 324 PL_op->op_private = 0;
120 AV *newpadlist, *newpad_name, *newpad; 325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
121 SV **npad; 363 SV **svp;
122 364
123 newpad_name = newAV (); 365 require_pv ("Time/HiRes.pm");
124 for (ix = fname; ix >= 0; ix--)
125 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126 366
127 newpad = newAV (); 367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
128 av_fill (newpad, AvFILLp (protopad));
129 npad = AvARRAY (newpad);
130 368
131 newpadlist = newAV (); 369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
379
380/** lowlevel stuff **********************************************************/
381
382static SV * ecb_noinline
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
392static AV * ecb_noinline
393coro_get_av (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV * ecb_noinline
403coro_get_hv (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
518coro_derive_padlist (pTHX_ CV *cv)
519{
520 PADLIST *padlist = CvPADLIST (cv);
521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
524
525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
132 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
133 av_store (newpadlist, 0, (SV *) newpad_name); 554#endif
134 av_store (newpadlist, 1, (SV *) newpad);
135 555
136 av = newAV (); /* will be @_ */ 556 /* Already extended to 2 elements by newPADLIST. */
137 av_extend (av, 0); 557 PadlistMAX (newpadlist) = 1;
138 av_store (newpad, 0, (SV *) av); 558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
139 AvFLAGS (av) = AVf_REIFY; 559 PadlistARRAY (newpadlist)[1] = newpad;
140 560
141 for (ix = fpad; ix > 0; ix--) 561 return newpadlist;
562}
563
564ecb_inline void
565free_padlist (pTHX_ PADLIST *padlist)
566{
567 /* may be during global destruction */
568 if (!IN_DESTRUCT)
142 { 569 {
143 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 570 I32 i = PadlistMAX (padlist);
144 if (namesv && namesv != &PL_sv_undef) 571
572 while (i > 0) /* special-case index 0 */
145 { 573 {
146 char *name = SvPVX (namesv); /* XXX */ 574 /* we try to be extra-careful here */
147 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 575 PAD *pad = PadlistARRAY (padlist)[i--];
148 { /* lexical from outside? */ 576
149 npad[ix] = SvREFCNT_inc (ppad[ix]); 577 if (pad)
150 } 578 {
151 else 579 I32 j = PadMAX (pad);
152 { /* our own lexical */ 580
153 SV *sv; 581 while (j >= 0)
154 if (*name == '&') 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
583
584 PadMAX (pad) = -1;
155 sv = SvREFCNT_inc (ppad[ix]); 585 SvREFCNT_dec (pad);
156 else if (*name == '@')
157 sv = (SV *) newAV ();
158 else if (*name == '%')
159 sv = (SV *) newHV ();
160 else
161 sv = NEWSV (0, 0);
162 if (!SvPADBUSY (sv))
163 SvPADMY_on (sv);
164 npad[ix] = sv;
165 } 586 }
166 } 587 }
167 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
168 {
169 npad[ix] = SvREFCNT_inc (ppad[ix]);
170 }
171 else
172 {
173 SV *sv = NEWSV (0, 0);
174 SvPADTMP_on (sv);
175 npad[ix] = sv;
176 }
177 }
178 588
179#if 0 /* return -ENOTUNDERSTOOD */ 589 SvREFCNT_dec (PadlistNAMES (padlist));
180 /* Now that vars are all in place, clone nested closures. */
181 590
182 for (ix = fpad; ix > 0; ix--) { 591#if NEWPADAPI
183 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 592 Safefree (PadlistARRAY (padlist));
184 if (namesv 593 Safefree (padlist);
185 && namesv != &PL_sv_undef 594#else
186 && !(SvFLAGS(namesv) & SVf_FAKE)
187 && *SvPVX(namesv) == '&'
188 && CvCLONE(ppad[ix]))
189 {
190 CV *kid = cv_clone((CV*)ppad[ix]);
191 SvREFCNT_dec(ppad[ix]);
192 CvCLONE_on(kid);
193 SvPADMY_on(kid);
194 npad[ix] = (SV*)kid;
195 }
196 }
197#endif
198
199 return newpadlist;
200}
201
202#ifdef MAY_FLUSH
203STATIC void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT(padlist))
208 {
209 I32 i = AvFILLp(padlist); 595 AvFILLp (padlist) = -1;
210 while (i >= 0) 596 AvREAL_off (padlist);
211 {
212 SV **svp = av_fetch(padlist, i--, FALSE);
213 SV *sv = svp ? *svp : Nullsv;
214 if (sv)
215 SvREFCNT_dec(sv);
216 }
217
218 SvREFCNT_dec((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
599 }
600}
601
602static int
603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
604{
605 PADLIST *padlist;
606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
608
609 /* perl manages to free our internal AV and _then_ call us */
610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
614 free_padlist (aTHX_ padlists[len]);
615
616 return 0;
617}
618
619static MGVTBL coro_cv_vtbl = {
620 0, 0, 0, 0,
621 coro_cv_free
622};
623
624/* the next two functions merely cache the padlists */
625ecb_inline void
626get_padlist (pTHX_ CV *cv)
627{
628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 size_t *lenp;
630
631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
633 else
634 {
635#if CORO_PREFER_PERL_FUNCTIONS
636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
638 CV *cp = Perl_cv_clone (aTHX_ cv);
639 CvPADLIST (cv) = CvPADLIST (cp);
640 CvPADLIST (cp) = 0;
641 SvREFCNT_dec (cp);
642#else
643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
644#endif
645 }
646}
647
648ecb_inline void
649put_padlist (pTHX_ CV *cv)
650{
651 MAGIC *mg = CORO_MAGIC_cv (cv);
652
653 if (ecb_expect_false (!mg))
654 {
655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
663
664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
665}
666
667/** load & save, init *******************************************************/
668
669ecb_inline void
670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
674
675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
219 } 703 }
220}
221#endif 704#endif
222
223/* the next two functions merely cache the padlists */
224STATIC void
225get_padlist (CV *cv)
226{
227 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229 if (he && AvFILLp ((AV *)*he) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231 else
232 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233} 705}
234 706
235STATIC void 707/* swap sv heads, at least logically */
236put_padlist (CV *cv)
237{
238 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240 if (SvTYPE (*he) != SVt_PVAV)
241 {
242 SvREFCNT_dec (*he);
243 *he = (SV *)newAV ();
244 }
245
246 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
247}
248
249#ifdef MAY_FLUSH
250STATIC void
251flush_padlist_cache ()
252{
253 HV *hv = padlist_cache;
254 padlist_cache = newHV ();
255
256 if (hv_iterinit (hv))
257 {
258 HE *he;
259 AV *padlist;
260
261 while (!!(he = hv_iternext (hv)))
262 {
263 AV *av = (AV *)HeVAL(he);
264
265 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (padlist);
268 }
269 }
270
271 SvREFCNT_dec (hv);
272}
273#endif
274
275#define SB do {
276#define SE } while (0)
277
278#define LOAD(state) load_state(aTHX_ (state));
279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283static void 708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
723
724static void
284load_state(pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
285{ 726{
286 PL_dowarn = c->dowarn; 727 perl_slots *slot = c->slot;
287 PL_in_eval = c->in_eval; 728 c->slot = 0;
288 729
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_top_env = c->top_env;
315 731
316 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 732#if CORO_JIT
317 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 733 load_perl_slots (slot);
318 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 734#else
735 #define VARx(name,expr,type) expr = slot->name;
736 #include "state.h"
737#endif
319 738
320 { 739 {
321 dSP; 740 dSP;
741
322 CV *cv; 742 CV *cv;
323 743
324 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
326 { 746 {
327 AV *padlist = (AV *)POPs;
328
329 if (padlist)
330 {
331 put_padlist (cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
332 CvPADLIST(cv) = padlist; 748 CvDEPTH (cv) = PTR2IV (POPs);
333#ifdef USE_THREADS 749 CvPADLIST (cv) = (PADLIST *)POPs;
334 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335#endif
336 }
337
338 ++CvDEPTH(cv);
339 } 750 }
340 751
341 PUTBACK; 752 PUTBACK;
342 } 753 }
343}
344 754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
775}
776
345static void 777static void
346save_state(pTHX_ Coro__State c, int flags) 778save_perl (pTHX_ Coro__State c)
347{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
348 { 801 {
349 dSP; 802 dSP;
350 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
351 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
352 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
354 /* 807 /*
355 * the worst thing you can imagine happens first - we have to save 808 * the worst thing you can imagine happens first - we have to save
356 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
357 */ 810 */
358 811
359 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
360 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
361 for (;;) 814 for (;;)
362 { 815 {
363 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
364 { 817 {
365 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
366 819
367 if (CxTYPE(cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
368 { 821 {
369 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
823
370 if (CvDEPTH(cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
371 { 825 {
372#ifdef USE_THREADS
373 /*XPUSHs ((SV *)CvOWNER(cv));*/
374 /*CvOWNER(cv) = 0;*/
375 /*error must unlock this cv etc.. etc...*/
376#endif
377 EXTEND (SP, CvDEPTH(cv)*2); 826 EXTEND (SP, 3);
378
379 while (--CvDEPTH(cv))
380 {
381 /* this tells the restore code to increment CvDEPTH */
382 PUSHs (Nullsv);
383 PUSHs ((SV *)cv);
384 }
385
386 PUSHs ((SV *)CvPADLIST(cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
387 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
388 830
389 get_padlist (cv); /* this is a monster */ 831 CvDEPTH (cv) = 0;
832 get_padlist (aTHX_ cv);
390 } 833 }
391 } 834 }
392 else if (CxTYPE(cx) == CXt_FORMAT)
393 {
394 /* I never used formats, so how should I know how these are implemented? */
395 /* my bold guess is as a simple, plain sub... */
396 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397 }
398 } 835 }
399 836
400 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
401 break; 838 break;
402 839
403 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
404 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
405 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
406 } 843 }
407 844
408 PUTBACK; 845 PUTBACK;
409 } 846 }
410 847
411 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
413 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
851 unsigned int i;
414 852
415 c->dowarn = PL_dowarn; 853 for (i = 0; i < SLOT_COUNT; ++i)
416 c->in_eval = PL_in_eval; 854 CXINC;
417 855
418 c->curstackinfo = PL_curstackinfo; 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
419 c->curstack = PL_curstack; 857 }
858
420 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
421 c->stack_sp = PL_stack_sp; 860
422 c->op = PL_op; 861 {
423 c->curpad = PL_curpad; 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
424 c->stack_base = PL_stack_base; 863
425 c->stack_max = PL_stack_max; 864#if CORO_JIT
426 c->tmps_stack = PL_tmps_stack; 865 save_perl_slots (slot);
427 c->tmps_floor = PL_tmps_floor; 866#else
428 c->tmps_ix = PL_tmps_ix; 867 #define VARx(name,expr,type) slot->name = expr;
429 c->tmps_max = PL_tmps_max; 868 #include "state.h"
430 c->markstack = PL_markstack; 869#endif
431 c->markstack_ptr = PL_markstack_ptr; 870 }
432 c->markstack_max = PL_markstack_max;
433 c->scopestack = PL_scopestack;
434 c->scopestack_ix = PL_scopestack_ix;
435 c->scopestack_max = PL_scopestack_max;
436 c->savestack = PL_savestack;
437 c->savestack_ix = PL_savestack_ix;
438 c->savestack_max = PL_savestack_max;
439 c->retstack = PL_retstack;
440 c->retstack_ix = PL_retstack_ix;
441 c->retstack_max = PL_retstack_max;
442 c->curcop = PL_curcop;
443 c->top_env = PL_top_env;
444} 871}
445 872
446/* 873/*
447 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
449 * on the assumption that coroutines do not usually need 876 * on the (sometimes correct) assumption that coroutines do
450 * a lot of stackspace. 877 * not usually need a lot of stackspace.
451 */ 878 */
452STATIC void 879#if CORO_PREFER_PERL_FUNCTIONS
880# define coro_init_stacks(thx) init_stacks ()
881#else
882static void
453coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
454{ 884{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 889
460 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 893
464 New(50,PL_tmps_stack,96,SV*); 894 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 897 PL_tmps_max = 32;
468 898
469 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
472 902
903#ifdef SET_MARK_OFFSET
473 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
905#endif
474 906
475 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
476 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
477 PL_scopestack_max = 16; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
478 913
479 New(54,PL_savestack,96,ANY); 914 New(54,PL_savestack,24,ANY);
480 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
481 PL_savestack_max = 96; 916 PL_savestack_max = 24;
482 917
918#if !PERL_VERSION_ATLEAST (5,10,0)
483 New(54,PL_retstack,8,OP*); 919 New(54,PL_retstack,4,OP*);
484 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
485 PL_retstack_max = 8; 921 PL_retstack_max = 4;
922#endif
486} 923}
924#endif
487 925
488/* 926/*
489 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
490 * still there is a memleak of 128 bytes...
491 */ 928 */
492STATIC void 929static void
493destroy_stacks(pTHX) 930coro_destruct_stacks (pTHX)
494{ 931{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 while (PL_scopestack_ix)
499 LEAVE;
500
501 /* sure it is, but more important: is it correct?? :/ */
502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503 FREETMPS;
504 }
505
506 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
508 934
509 while (PL_curstackinfo) 935 while (PL_curstackinfo)
510 { 936 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 937 PERL_SI *p = PL_curstackinfo->si_prev;
512 938
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 939 if (!IN_DESTRUCT)
520 {
521 dounwind(-1);
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 940 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 941
525 Safefree(PL_curstackinfo->si_cxstack); 942 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree(PL_curstackinfo); 943 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 944 PL_curstackinfo = p;
528 } 945 }
529 946
530 Safefree(PL_tmps_stack); 947 Safefree (PL_tmps_stack);
531 Safefree(PL_markstack); 948 Safefree (PL_markstack);
532 Safefree(PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
533 Safefree(PL_savestack); 953 Safefree (PL_savestack);
954#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree(PL_retstack); 955 Safefree (PL_retstack);
535}
536
537static void
538allocate_stack (Coro__State ctx, int alloc)
539{
540 coro_stack *stack;
541
542 New (0, stack, 1, coro_stack);
543
544 stack->refcnt = 1;
545 stack->usecnt = 1;
546 stack->gencnt = ctx->gencnt = 0;
547 if (alloc)
548 {
549#if HAVE_MMAP
550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552 if (stack->sptr == (void *)-1)
553#endif 956#endif
957}
958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
967
968static size_t
969coro_rss (pTHX_ struct coro *coro)
970{
971 size_t rss = sizeof (*coro);
972
973 if (coro->mainstack)
974 {
975 if (coro->flags & CF_RUNNING)
554 { 976 {
555 /*FIXME*//*D*//* reasonable stack size! */ 977 #define SYM(sym) PL_ ## sym
556 stack->ssize = -4096 * sizeof (long); 978 CORO_RSS;
557 New (0, stack->sptr, 4096, long); 979 #undef SYM
558 } 980 }
559 }
560 else 981 else
561 stack->sptr = 0;
562
563 ctx->stack = stack;
564}
565
566static void
567deallocate_stack (Coro__State ctx)
568{
569 coro_stack *stack = ctx->stack;
570
571 ctx->stack = 0;
572
573 if (stack)
574 {
575 if (!--stack->refcnt)
576 { 982 {
577#ifdef HAVE_MMAP 983 #define SYM(sym) coro->slot->sym
578 if (stack->ssize > 0 && stack->sptr) 984 CORO_RSS;
579 munmap (stack->sptr, stack->ssize); 985 #undef SYM
986 }
987 }
988
989 return rss;
990}
991
992/** coroutine stack handling ************************************************/
993
994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
1004
1005/*
1006 * This overrides the default magic get method of %SIG elements.
1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1008 * and instead of trying to save and restore the hash elements (extremely slow),
1009 * we just provide our own readback here.
1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
580 else 1031 else
581#else 1032 ssv = *svp;
582 Safefree (stack->sptr); 1033
583#endif 1034 sv_setsv (sv, ssv);
584 Safefree (stack); 1035 return 0;
585 } 1036 }
586 else if (ctx->gencnt == stack->gencnt) 1037 }
587 --stack->usecnt; 1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
588 } 1048 {
589} 1049 SV **svp = 0;
590 1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
591static void 1097static int
592setup_coro (void *arg) 1098slf_check_nop (pTHX_ struct CoroSLF *frame)
1099{
1100 return 0;
1101}
1102
1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1112init_perl (pTHX_ struct coro *coro)
593{ 1113{
594 /* 1114 /*
595 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
596 */ 1116 */
1117 coro_init_stacks (aTHX);
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 PL_curcop = &PL_compiling;
1121 PL_in_eval = EVAL_NULL;
1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
1126 PL_curpm = 0;
1127 PL_curpad = 0;
1128 PL_localizing = 0;
1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
1134
1135 /* recreate the die/warn hooks */
1136 PL_diehook = SvREFCNT_inc (rv_diehook);
1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1138
1139 GvSV (PL_defgv) = newSV (0);
1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
1141 GvSV (PL_errgv) = newSV (0);
1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = 0;
1144 PL_rs = newSVsv (GvSV (irsgv));
1145 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1146
1147 {
1148 dSP;
1149 UNOP myop;
1150
1151 Zero (&myop, 1, UNOP);
1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
1154 myop.op_flags = OPf_WANT_VOID;
1155
1156 PUSHMARK (SP);
1157 PUSHs ((SV *)coro->startcv);
1158 PUTBACK;
1159 PL_op = (OP *)&myop;
1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1161 }
1162
1163 /* this newly created coroutine might be run on an existing cctx which most
1164 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1165 */
1166 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1167 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1168 slf_frame.destroy = 0;
1169
1170 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1171 init_perl_op.op_next = PL_op;
1172 init_perl_op.op_type = OP_ENTERSUB;
1173 init_perl_op.op_ppaddr = pp_slf;
1174 /* no flags etc. required, as an init function won't be called */
1175
1176 PL_op = (OP *)&init_perl_op;
1177
1178 /* copy throw, in case it was set before init_perl */
1179 CORO_THROW = coro->except;
1180
1181 SWAP_SVS (coro);
1182
1183 if (ecb_expect_false (enable_times))
1184 {
1185 coro_times_update ();
1186 coro_times_sub (coro);
1187 }
1188}
1189
1190static void
1191coro_unwind_stacks (pTHX)
1192{
1193 if (!IN_DESTRUCT)
1194 {
1195 /* restore all saved variables and stuff */
1196 LEAVE_SCOPE (0);
1197 assert (PL_tmps_floor == -1);
1198
1199 /* free all temporaries */
1200 FREETMPS;
1201 assert (PL_tmps_ix == -1);
1202
1203 /* unwind all extra stacks */
1204 POPSTACK_TO (PL_mainstack);
1205
1206 /* unwind main stack */
1207 dounwind (-1);
1208 }
1209}
1210
1211static void
1212destroy_perl (pTHX_ struct coro *coro)
1213{
1214 SV *svf [9];
1215
1216 {
1217 SV *old_current = SvRV (coro_current);
1218 struct coro *current = SvSTATE (old_current);
1219
1220 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1221
1222 save_perl (aTHX_ current);
1223
1224 /* this will cause transfer_check to croak on block*/
1225 SvRV_set (coro_current, (SV *)coro->hv);
1226
1227 load_perl (aTHX_ coro);
1228
1229 coro_unwind_stacks (aTHX);
1230
1231 /* restore swapped sv's */
1232 SWAP_SVS (coro);
1233
1234 coro_destruct_stacks (aTHX);
1235
1236 /* now save some sv's to be free'd later */
1237 svf [0] = GvSV (PL_defgv);
1238 svf [1] = (SV *)GvAV (PL_defgv);
1239 svf [2] = GvSV (PL_errgv);
1240 svf [3] = (SV *)PL_defoutgv;
1241 svf [4] = PL_rs;
1242 svf [5] = GvSV (irsgv);
1243 svf [6] = (SV *)GvHV (PL_hintgv);
1244 svf [7] = PL_diehook;
1245 svf [8] = PL_warnhook;
1246 assert (9 == sizeof (svf) / sizeof (*svf));
1247
1248 SvRV_set (coro_current, old_current);
1249
1250 load_perl (aTHX_ current);
1251 }
1252
1253 {
1254 unsigned int i;
1255
1256 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1257 SvREFCNT_dec (svf [i]);
1258
1259 SvREFCNT_dec (coro->saved_deffh);
1260 SvREFCNT_dec (coro->rouse_cb);
1261 SvREFCNT_dec (coro->invoke_cb);
1262 SvREFCNT_dec (coro->invoke_av);
1263 }
1264}
1265
1266ecb_inline void
1267free_coro_mortal (pTHX)
1268{
1269 if (ecb_expect_true (coro_mortal))
1270 {
1271 SvREFCNT_dec ((SV *)coro_mortal);
1272 coro_mortal = 0;
1273 }
1274}
1275
1276static int
1277runops_trace (pTHX)
1278{
1279 COP *oldcop = 0;
1280 int oldcxix = -2;
1281
1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1283 {
1284 PERL_ASYNC_CHECK ();
1285
1286 if (cctx_current->flags & CC_TRACE_ALL)
1287 {
1288 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1289 {
1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1291 SV **bot, **top;
1292 AV *av = newAV (); /* return values */
1293 SV **cb;
1294 dSP;
1295
1296 GV *gv = CvGV (cx->blk_sub.cv);
1297 SV *fullname = sv_2mortal (newSV (0));
1298 if (isGV (gv))
1299 gv_efullname3 (fullname, gv, 0);
1300
1301 bot = PL_stack_base + cx->blk_oldsp + 1;
1302 top = cx->blk_gimme == G_ARRAY ? SP + 1
1303 : cx->blk_gimme == G_SCALAR ? bot + 1
1304 : bot;
1305
1306 av_extend (av, top - bot);
1307 while (bot < top)
1308 av_push (av, SvREFCNT_inc_NN (*bot++));
1309
1310 PL_runops = RUNOPS_DEFAULT;
1311 ENTER;
1312 SAVETMPS;
1313 EXTEND (SP, 3);
1314 PUSHMARK (SP);
1315 PUSHs (&PL_sv_no);
1316 PUSHs (fullname);
1317 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1318 PUTBACK;
1319 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1320 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1321 SPAGAIN;
1322 FREETMPS;
1323 LEAVE;
1324 PL_runops = runops_trace;
1325 }
1326
1327 if (oldcop != PL_curcop)
1328 {
1329 oldcop = PL_curcop;
1330
1331 if (PL_curcop != &PL_compiling)
1332 {
1333 SV **cb;
1334
1335 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1336 {
1337 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1338
1339 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1340 {
1341 dSP;
1342 GV *gv = CvGV (cx->blk_sub.cv);
1343 SV *fullname = sv_2mortal (newSV (0));
1344
1345 if (isGV (gv))
1346 gv_efullname3 (fullname, gv, 0);
1347
1348 PL_runops = RUNOPS_DEFAULT;
1349 ENTER;
1350 SAVETMPS;
1351 EXTEND (SP, 3);
1352 PUSHMARK (SP);
1353 PUSHs (&PL_sv_yes);
1354 PUSHs (fullname);
1355 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1356 PUTBACK;
1357 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1358 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1359 SPAGAIN;
1360 FREETMPS;
1361 LEAVE;
1362 PL_runops = runops_trace;
1363 }
1364
1365 oldcxix = cxstack_ix;
1366 }
1367
1368 if (cctx_current->flags & CC_TRACE_LINE)
1369 {
1370 dSP;
1371
1372 PL_runops = RUNOPS_DEFAULT;
1373 ENTER;
1374 SAVETMPS;
1375 EXTEND (SP, 3);
1376 PL_runops = RUNOPS_DEFAULT;
1377 PUSHMARK (SP);
1378 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1379 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1380 PUTBACK;
1381 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1382 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1383 SPAGAIN;
1384 FREETMPS;
1385 LEAVE;
1386 PL_runops = runops_trace;
1387 }
1388 }
1389 }
1390 }
1391 }
1392
1393 TAINT_NOT;
1394 return 0;
1395}
1396
1397static struct CoroSLF cctx_ssl_frame;
1398
1399static void
1400slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1401{
1402 ta->prev = 0;
1403}
1404
1405static int
1406slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1407{
1408 *frame = cctx_ssl_frame;
1409
1410 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1411}
1412
1413/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1414static void ecb_noinline
1415cctx_prepare (pTHX)
1416{
1417 PL_top_env = &PL_start_env;
1418
1419 if (cctx_current->flags & CC_TRACE)
1420 PL_runops = runops_trace;
1421
1422 /* we already must be executing an SLF op, there is no other valid way
1423 * that can lead to creation of a new cctx */
1424 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1425 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1426
1427 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1428 cctx_ssl_frame = slf_frame;
1429
1430 slf_frame.prepare = slf_prepare_set_stacklevel;
1431 slf_frame.check = slf_check_set_stacklevel;
1432}
1433
1434/* the tail of transfer: execute stuff we can only do after a transfer */
1435ecb_inline void
1436transfer_tail (pTHX)
1437{
1438 free_coro_mortal (aTHX);
1439}
1440
1441/* try to exit the same way perl's main function would do */
1442/* we do not bother resetting the environment or other things *7
1443/* that are not, uhm, essential */
1444/* this obviously also doesn't work when perl is embedded */
1445static void ecb_noinline ecb_cold
1446perlish_exit (pTHX)
1447{
1448 int exitstatus = perl_destruct (PL_curinterp);
1449 perl_free (PL_curinterp);
1450 exit (exitstatus);
1451}
1452
1453/*
1454 * this is a _very_ stripped down perl interpreter ;)
1455 */
1456static void
1457cctx_run (void *arg)
1458{
1459#ifdef USE_ITHREADS
1460# if CORO_PTHREAD
1461 PERL_SET_CONTEXT (coro_thx);
1462# endif
1463#endif
1464 {
1465 dTHX;
1466
1467 /* normally we would need to skip the entersub here */
1468 /* not doing so will re-execute it, which is exactly what we want */
1469 /* PL_nop = PL_nop->op_next */
1470
1471 /* inject a fake subroutine call to cctx_init */
1472 cctx_prepare (aTHX);
1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
1477 /* somebody or something will hit me for both perl_run and PL_restartop */
1478 PL_restartop = PL_op;
1479 perl_run (PL_curinterp);
1480 /*
1481 * Unfortunately, there is no way to get at the return values of the
1482 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1483 * runtime errors here, as this is just a random interpreter, not a thread.
1484 */
1485
1486 /*
1487 * If perl-run returns we assume exit() was being called or the coro
1488 * fell off the end, which seems to be the only valid (non-bug)
1489 * reason for perl_run to return. We try to mimic whatever perl is normally
1490 * doing in that case. YMMV.
1491 */
1492 perlish_exit (aTHX);
1493 }
1494}
1495
1496static coro_cctx *
1497cctx_new (void)
1498{
1499 coro_cctx *cctx;
1500
1501 ++cctx_count;
1502 New (0, cctx, 1, coro_cctx);
1503
1504 cctx->gen = cctx_gen;
1505 cctx->flags = 0;
1506 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1507
1508 return cctx;
1509}
1510
1511/* create a new cctx only suitable as source */
1512static coro_cctx *
1513cctx_new_empty (void)
1514{
1515 coro_cctx *cctx = cctx_new ();
1516
1517 cctx->stack.sptr = 0;
1518 coro_create (&cctx->cctx, 0, 0, 0, 0);
1519
1520 return cctx;
1521}
1522
1523/* create a new cctx suitable as destination/running a perl interpreter */
1524static coro_cctx *
1525cctx_new_run (void)
1526{
1527 coro_cctx *cctx = cctx_new ();
1528
1529 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1530 {
1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1532 _exit (EXIT_FAILURE);
1533 }
1534
1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1536
1537 return cctx;
1538}
1539
1540static void
1541cctx_destroy (coro_cctx *cctx)
1542{
1543 if (!cctx)
1544 return;
1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1550
1551 coro_stack_free (&cctx->stack);
1552
1553 Safefree (cctx);
1554}
1555
1556/* wether this cctx should be destructed */
1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1558
1559static coro_cctx *
1560cctx_get (pTHX)
1561{
1562 while (ecb_expect_true (cctx_first))
1563 {
1564 coro_cctx *cctx = cctx_first;
1565 cctx_first = cctx->next;
1566 --cctx_idle;
1567
1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1569 return cctx;
1570
1571 cctx_destroy (cctx);
1572 }
1573
1574 return cctx_new_run ();
1575}
1576
1577static void
1578cctx_put (coro_cctx *cctx)
1579{
1580 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1581
1582 /* free another cctx if overlimit */
1583 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1584 {
1585 coro_cctx *first = cctx_first;
1586 cctx_first = first->next;
1587 --cctx_idle;
1588
1589 cctx_destroy (first);
1590 }
1591
1592 ++cctx_idle;
1593 cctx->next = cctx_first;
1594 cctx_first = cctx;
1595}
1596
1597/** coroutine switching *****************************************************/
1598
1599static void
1600transfer_check (pTHX_ struct coro *prev, struct coro *next)
1601{
1602 /* TODO: throwing up here is considered harmful */
1603
1604 if (ecb_expect_true (prev != next))
1605 {
1606 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1607 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1608
1609 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1610 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1611
1612#if !PERL_VERSION_ATLEAST (5,10,0)
1613 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1614 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1615#endif
1616 }
1617}
1618
1619/* always use the TRANSFER macro */
1620static void ecb_noinline /* noinline so we have a fixed stackframe */
1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1622{
1623 dSTACKLEVEL;
1624
1625 /* sometimes transfer is only called to set idle_sp */
1626 if (ecb_expect_false (!prev))
1627 {
1628 cctx_current->idle_sp = STACKLEVEL;
1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1630 }
1631 else if (ecb_expect_true (prev != next))
1632 {
1633 coro_cctx *cctx_prev;
1634
1635 if (ecb_expect_false (prev->flags & CF_NEW))
1636 {
1637 /* create a new empty/source context */
1638 prev->flags &= ~CF_NEW;
1639 prev->flags |= CF_RUNNING;
1640 }
1641
1642 prev->flags &= ~CF_RUNNING;
1643 next->flags |= CF_RUNNING;
1644
1645 /* first get rid of the old state */
1646 save_perl (aTHX_ prev);
1647
1648 if (ecb_expect_false (next->flags & CF_NEW))
1649 {
1650 /* need to start coroutine */
1651 next->flags &= ~CF_NEW;
1652 /* setup coroutine call */
1653 init_perl (aTHX_ next);
1654 }
1655 else
1656 load_perl (aTHX_ next);
1657
1658 /* possibly untie and reuse the cctx */
1659 if (ecb_expect_true (
1660 cctx_current->idle_sp == STACKLEVEL
1661 && !(cctx_current->flags & CC_TRACE)
1662 && !force_cctx
1663 ))
1664 {
1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1667
1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1669 /* without this the next cctx_get might destroy the running cctx while still in use */
1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1671 if (ecb_expect_true (!next->cctx))
1672 next->cctx = cctx_get (aTHX);
1673
1674 cctx_put (cctx_current);
1675 }
1676 else
1677 prev->cctx = cctx_current;
1678
1679 ++next->usecount;
1680
1681 cctx_prev = cctx_current;
1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1683
1684 next->cctx = 0;
1685
1686 if (ecb_expect_false (cctx_prev != cctx_current))
1687 {
1688 cctx_prev->top_env = PL_top_env;
1689 PL_top_env = cctx_current->top_env;
1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1691 }
1692
1693 transfer_tail (aTHX);
1694 }
1695}
1696
1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1699
1700/** high level stuff ********************************************************/
1701
1702/* this function is actually Coro, not Coro::State, but we call it from here */
1703/* because it is convenient - but it hasn't been declared yet for that reason */
1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
1708coro_state_destroy (pTHX_ struct coro *coro)
1709{
1710 if (coro->flags & CF_ZOMBIE)
1711 return;
1712
1713 slf_destroy (aTHX_ coro);
1714
1715 coro->flags |= CF_ZOMBIE;
1716
1717 if (coro->flags & CF_READY)
1718 {
1719 /* reduce nready, as destroying a ready coro effectively unreadies it */
1720 /* alternative: look through all ready queues and remove the coro */
1721 --coro_nready;
1722 }
1723 else
1724 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1725
1726 if (coro->next) coro->next->prev = coro->prev;
1727 if (coro->prev) coro->prev->next = coro->next;
1728 if (coro == coro_first) coro_first = coro->next;
1729
1730 if (coro->mainstack
1731 && coro->mainstack != main_mainstack
1732 && coro->slot
1733 && !PL_dirty)
1734 destroy_perl (aTHX_ coro);
1735
1736 cctx_destroy (coro->cctx);
1737 SvREFCNT_dec (coro->startcv);
1738 SvREFCNT_dec (coro->args);
1739 SvREFCNT_dec (coro->swap_sv);
1740 SvREFCNT_dec (CORO_THROW);
1741
1742 coro_call_on_destroy (aTHX_ coro);
1743
1744 /* more destruction mayhem in coro_state_free */
1745}
1746
1747static int
1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 struct coro *coro = (struct coro *)mg->mg_ptr;
1751 mg->mg_ptr = 0;
1752
1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
1757 Safefree (coro);
1758
1759 return 0;
1760}
1761
1762static int ecb_cold
1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1764{
1765 /* called when perl clones the current process the slow way (windows process emulation) */
1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
1769
1770 return 0;
1771}
1772
1773static MGVTBL coro_state_vtbl = {
1774 0, 0, 0, 0,
1775 coro_state_free,
1776 0,
1777#ifdef MGf_DUP
1778 coro_state_dup,
1779#else
1780# define MGf_DUP 0
1781#endif
1782};
1783
1784static void
1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1786{
1787 ta->prev = SvSTATE (prev_sv);
1788 ta->next = SvSTATE (next_sv);
1789 TRANSFER_CHECK (*ta);
1790}
1791
1792static void
1793api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1794{
1795 struct coro_transfer_args ta;
1796
1797 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1798 TRANSFER (ta, 1);
1799}
1800
1801/** Coro ********************************************************************/
1802
1803ecb_inline void
1804coro_enq (pTHX_ struct coro *coro)
1805{
1806 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1807
1808 SvREFCNT_inc_NN (coro->hv);
1809
1810 coro->next_ready = 0;
1811 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1812 ready [1] = coro;
1813}
1814
1815ecb_inline struct coro *
1816coro_deq (pTHX)
1817{
1818 int prio;
1819
1820 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1821 {
1822 struct coro **ready = coro_ready [prio];
1823
1824 if (ready [0])
1825 {
1826 struct coro *coro = ready [0];
1827 ready [0] = coro->next_ready;
1828 return coro;
1829 }
1830 }
1831
1832 return 0;
1833}
1834
1835static void
1836invoke_sv_ready_hook_helper (void)
1837{
1838 dTHX;
597 dSP; 1839 dSP;
598 Coro__State ctx = (Coro__State)arg;
599 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600 1840
601 coro_init_stacks (aTHX); 1841 ENTER;
602 /*PL_curcop = 0;*/ 1842 SAVETMPS;
603 /*PL_in_eval = PL_in_eval;*/ /* inherit */
604 SvREFCNT_dec (GvAV (PL_defgv));
605 GvAV (PL_defgv) = ctx->args;
606 1843
607 SPAGAIN;
608
609 if (ctx->stack)
610 {
611 ctx->cursp = 0;
612
613 PUSHMARK(SP); 1844 PUSHMARK (SP);
614 PUTBACK; 1845 PUTBACK;
615 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
616 1847
617 if (SvTRUE (ERRSV)) 1848 FREETMPS;
618 croak (NULL); 1849 LEAVE;
619 else 1850}
620 croak ("FATAL: CCTXT coroutine returned!"); 1851
1852static int
1853api_ready (pTHX_ SV *coro_sv)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
1857 if (coro->flags & CF_READY)
1858 return 0;
1859
1860 coro->flags |= CF_READY;
1861
1862 coro_enq (aTHX_ coro);
1863
1864 if (!coro_nready++)
1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
1867
1868 return 1;
1869}
1870
1871static int
1872api_is_ready (pTHX_ SV *coro_sv)
1873{
1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1875}
1876
1877/* expects to own a reference to next->hv */
1878ecb_inline void
1879prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1880{
1881 SV *prev_sv = SvRV (coro_current);
1882
1883 ta->prev = SvSTATE_hv (prev_sv);
1884 ta->next = next;
1885
1886 TRANSFER_CHECK (*ta);
1887
1888 SvRV_set (coro_current, (SV *)next->hv);
1889
1890 free_coro_mortal (aTHX);
1891 coro_mortal = prev_sv;
1892}
1893
1894static void
1895prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1896{
1897 for (;;)
621 } 1898 {
622 else 1899 struct coro *next = coro_deq (aTHX);
623 {
624 UNOP myop;
625 1900
626 PL_op = (OP *)&myop; 1901 if (ecb_expect_true (next))
627
628 Zero(&myop, 1, UNOP);
629 myop.op_next = Nullop;
630 myop.op_flags = OPf_WANT_VOID;
631
632 PUSHMARK(SP);
633 XPUSHs (sub_init);
634 /*
635 * the next line is slightly wrong, as PL_op->op_next
636 * is actually being executed so we skip the first op.
637 * that doesn't matter, though, since it is only
638 * pp_nextstate and we never return...
639 * ah yes, and I don't care anyways ;)
640 */
641 PUTBACK;
642 PL_op = pp_entersub();
643 SPAGAIN;
644
645 ENTER; /* necessary e.g. for dounwind */
646 }
647}
648
649static void
650continue_coro (void *arg)
651{
652 /*
653 * this is a _very_ stripped down perl interpreter ;)
654 */
655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
657
658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671STATIC void
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675 static struct coro *xnext;
676
677 if (prev != next)
678 {
679 xnext = next;
680
681 if (next->mainstack)
682 { 1902 {
683 SAVE (prev, flags); 1903 /* cannot transfer to destroyed coros, skip and look for next */
684 LOAD (next); 1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
685 1905 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
686 /* mark this state as in-use */ 1906 else
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 { 1907 {
693 if (!prev->stack) 1908 next->flags &= ~CF_READY;
694 allocate_stack (prev, 0); 1909 --coro_nready;
695 else if (prev->cursp != stacklevel 1910
696 && prev->stack->usecnt > 1) 1911 prepare_schedule_to (aTHX_ ta, next);
697 { 1912 break;
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
714 } 1913 }
715
716 } 1914 }
717 else if (next->tmps_ix == -2)
718 croak ("tried to transfer to running coroutine");
719 else 1915 else
720 { 1916 {
721 SAVE (prev, -1); /* first get rid of the old state */ 1917 /* nothing to schedule: call the idle handler */
722 1918 if (SvROK (sv_idle)
723 if (flags & TRANSFER_SAVE_CCTXT) 1919 && SvOBJECT (SvRV (sv_idle)))
724 { 1920 {
725 if (!prev->stack) 1921 if (SvRV (sv_idle) == SvRV (coro_current))
726 allocate_stack (prev, 0);
727
728 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729 { 1922 {
730 setup_coro (next); 1923 require_pv ("Carp");
731 1924
732 prev->stack->refcnt++; 1925 {
733 prev->stack->usecnt++; 1926 dSP;
734 next->stack = prev->stack; 1927
735 next->gencnt = prev->gencnt; 1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1933 PUTBACK;
1934 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1935
1936 FREETMPS;
1937 LEAVE;
1938 }
736 } 1939 }
737 else 1940
738 { 1941 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
739 allocate_stack (next, 1); 1942 api_ready (aTHX_ SvRV (sv_idle));
740 coro_create (&(next->stack->cctx), 1943 --coro_nready;
741 setup_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
745 }
746 } 1944 }
747 else 1945 else
748 setup_coro (next); 1946 {
1947 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1948 dSP;
1949
1950 ENTER;
1951 SAVETMPS;
1952
1953 PUSHMARK (SP);
1954 PUTBACK;
1955 call_sv (sv_idle, G_VOID | G_DISCARD);
1956
1957 FREETMPS;
1958 LEAVE;
1959 }
749 } 1960 }
1961 }
1962}
750 1963
751 /* 1964ecb_inline void
752 * xnext is now either prev or next, depending on wether 1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
753 * we switched the c stack or not. that's why i use a global 1966{
754 * variable, that should become thread-specific at one point. 1967 api_ready (aTHX_ coro_current);
1968 prepare_schedule (aTHX_ ta);
1969}
1970
1971ecb_inline void
1972prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV *prev = SvRV (coro_current);
1975
1976 if (coro_nready)
1977 {
1978 prepare_schedule (aTHX_ ta);
1979 api_ready (aTHX_ prev);
1980 }
1981 else
1982 prepare_nop (aTHX_ ta);
1983}
1984
1985static void
1986api_schedule (pTHX)
1987{
1988 struct coro_transfer_args ta;
1989
1990 prepare_schedule (aTHX_ &ta);
1991 TRANSFER (ta, 1);
1992}
1993
1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
1999
2000 SvREFCNT_inc_NN (coro_sv);
2001 prepare_schedule_to (aTHX_ &ta, next);
2002}
2003
2004static int
2005api_cede (pTHX)
2006{
2007 struct coro_transfer_args ta;
2008
2009 prepare_cede (aTHX_ &ta);
2010
2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
2014 return 1;
2015 }
2016 else
2017 return 0;
2018}
2019
2020static int
2021api_cede_notself (pTHX)
2022{
2023 if (coro_nready)
2024 {
2025 struct coro_transfer_args ta;
2026
2027 prepare_cede_notself (aTHX_ &ta);
2028 TRANSFER (ta, 1);
2029 return 1;
2030 }
2031 else
2032 return 0;
2033}
2034
2035static void
2036api_trace (pTHX_ SV *coro_sv, int flags)
2037{
2038 struct coro *coro = SvSTATE (coro_sv);
2039
2040 if (coro->flags & CF_RUNNING)
2041 croak ("cannot enable tracing on a running coroutine, caught");
2042
2043 if (flags & CC_TRACE)
2044 {
2045 if (!coro->cctx)
2046 coro->cctx = cctx_new_run ();
2047 else if (!(coro->cctx->flags & CC_TRACE))
2048 croak ("cannot enable tracing on coroutine with custom stack, caught");
2049
2050 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2051 }
2052 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2053 {
2054 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2055
2056 if (coro->flags & CF_RUNNING)
2057 PL_runops = RUNOPS_DEFAULT;
2058 else
2059 coro->slot->runops = RUNOPS_DEFAULT;
2060 }
2061}
2062
2063static void
2064coro_push_av (pTHX_ AV *av, I32 gimme_v)
2065{
2066 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2067 {
2068 dSP;
2069
2070 if (gimme_v == G_SCALAR)
2071 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2072 else
2073 {
2074 int i;
2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
2079 }
2080
2081 PUTBACK;
2082 }
2083}
2084
2085static void
2086coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2087{
2088 if (!coro->on_destroy)
2089 coro->on_destroy = newAV ();
2090
2091 av_push (coro->on_destroy, cb);
2092}
2093
2094static void
2095slf_destroy_join (pTHX_ struct CoroSLF *frame)
2096{
2097 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2098}
2099
2100static int
2101slf_check_join (pTHX_ struct CoroSLF *frame)
2102{
2103 struct coro *coro = (struct coro *)frame->data;
2104
2105 if (!coro->status)
2106 return 1;
2107
2108 frame->destroy = 0;
2109
2110 coro_push_av (aTHX_ coro->status, GIMME_V);
2111
2112 SvREFCNT_dec ((SV *)coro->hv);
2113
2114 return 0;
2115}
2116
2117static void
2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2121
2122 if (items > 1)
2123 croak ("join called with too many arguments");
2124
2125 if (coro->status)
2126 frame->prepare = prepare_nop;
2127 else
2128 {
2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2130 frame->prepare = prepare_schedule;
2131 }
2132
2133 frame->check = slf_check_join;
2134 frame->destroy = slf_destroy_join;
2135 frame->data = (void *)coro;
2136 SvREFCNT_inc (coro->hv);
2137}
2138
2139static void
2140coro_call_on_destroy (pTHX_ struct coro *coro)
2141{
2142 AV *od = coro->on_destroy;
2143
2144 if (!od)
2145 return;
2146
2147 coro->on_destroy = 0;
2148 sv_2mortal ((SV *)od);
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
2158 {
2159 dSP; /* don't disturb outer sp */
2160 PUSHMARK (SP);
2161
2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
2171 }
2172 }
2173}
2174
2175static void
2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2177{
2178 AV *av;
2179
2180 if (coro->status)
2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
2187
2188 /* items are actually not so common, so optimise for this case */
2189 if (items)
2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 if (!self)
2255 croak ("Coro::cancel called outside of thread content,");
2256
2257 /* otherwise we cancel directly, purely for speed reasons
2258 * unfortunately, this requires some magic trickery, as
2259 * somebody else could cancel us, so we have to fight the cancellation.
2260 * this is ugly, and hopefully fully worth the extra speed.
2261 * besides, I can't get the slow-but-safe version working...
755 */ 2262 */
756 xnext->cursp = stacklevel; 2263 slf_frame.data = 0;
757 } 2264 self->flags |= CF_NOCANCEL;
758} 2265 coro_state_destroy (aTHX_ coro);
2266 self->flags &= ~CF_NOCANCEL;
759 2267
760static struct coro * 2268 if (slf_frame.data)
761sv_to_coro (SV *arg, const char *funcname, const char *varname)
762{
763 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
764 {
765 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
766
767 if (!he)
768 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
769
770 arg = HeVAL(he);
771 }
772
773 /* must also be changed inside Coro::Cont::yield */
774 if (SvROK(arg) && SvOBJECT(SvRV(arg))
775 && SvSTASH(SvRV(arg)) == coro_state_stash)
776 return (struct coro *) SvIV((SV*)SvRV(arg));
777
778 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
779 /*NORETURN*/
780}
781
782static void
783api_transfer(pTHX_ SV *prev, SV *next, int flags)
784{
785 transfer(aTHX_
786 sv_to_coro (prev, "Coro::transfer", "prev"),
787 sv_to_coro (next, "Coro::transfer", "next"),
788 flags);
789}
790
791/** Coro ********************************************************************/
792
793#define PRIO_MAX 3
794#define PRIO_HIGH 1
795#define PRIO_NORMAL 0
796#define PRIO_LOW -1
797#define PRIO_IDLE -3
798#define PRIO_MIN -4
799
800/* for Coro.pm */
801static GV *coro_current, *coro_idle;
802static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
803static int coro_nready;
804
805static void
806coro_enq (SV *sv)
807{
808 if (SvROK (sv))
809 {
810 SV *hv = SvRV (sv);
811 if (SvTYPE (hv) == SVt_PVHV)
812 { 2269 {
813 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2270 /* while we were busy we have been cancelled, so terminate */
814 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2271 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2272 }
2273 else
2274 {
2275 frame->prepare = prepare_nop;
2276 frame->check = slf_check_nop;
2277 }
2278 }
2279}
815 2280
816 prio = prio > PRIO_MAX ? PRIO_MAX 2281static int
817 : prio < PRIO_MIN ? PRIO_MIN 2282slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
818 : prio; 2283{
2284 frame->prepare = 0;
2285 coro_unwind_stacks (aTHX);
819 2286
820 av_push (coro_ready [prio - PRIO_MIN], sv); 2287 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
821 coro_nready++;
822 2288
2289 return 1;
2290}
2291
2292static int
2293safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2294{
2295 if (coro->cctx)
2296 croak ("coro inside C callback, unable to cancel at this time, caught");
2297
2298 if (coro->flags & CF_NEW)
2299 {
2300 coro_set_status (aTHX_ coro, arg, items);
2301 coro_state_destroy (aTHX_ coro);
2302 }
2303 else
2304 {
2305 if (!coro->slf_frame.prepare)
2306 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2307
2308 slf_destroy (aTHX_ coro);
2309
2310 coro_set_status (aTHX_ coro, arg, items);
2311 coro->slf_frame.prepare = prepare_nop;
2312 coro->slf_frame.check = slf_check_safe_cancel;
2313
2314 api_ready (aTHX_ (SV *)coro->hv);
2315 }
2316
2317 return 1;
2318}
2319
2320/*****************************************************************************/
2321/* async pool handler */
2322
2323static int
2324slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2325{
2326 HV *hv = (HV *)SvRV (coro_current);
2327 struct coro *coro = (struct coro *)frame->data;
2328
2329 if (!coro->invoke_cb)
2330 return 1; /* loop till we have invoke */
2331 else
2332 {
2333 hv_store (hv, "desc", sizeof ("desc") - 1,
2334 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2335
2336 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2337
2338 {
2339 dSP;
2340 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2341 PUTBACK;
2342 }
2343
2344 SvREFCNT_dec (GvAV (PL_defgv));
2345 GvAV (PL_defgv) = coro->invoke_av;
2346 coro->invoke_av = 0;
2347
2348 return 0;
2349 }
2350}
2351
2352static void
2353slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2354{
2355 HV *hv = (HV *)SvRV (coro_current);
2356 struct coro *coro = SvSTATE_hv ((SV *)hv);
2357
2358 if (ecb_expect_true (coro->saved_deffh))
2359 {
2360 /* subsequent iteration */
2361 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2362 coro->saved_deffh = 0;
2363
2364 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2365 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2366 {
2367 slf_init_terminate_cancel_common (aTHX_ frame, hv);
823 return; 2368 return;
824 } 2369 }
2370 else
2371 {
2372 av_clear (GvAV (PL_defgv));
2373 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2374
2375 coro->prio = 0;
2376
2377 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2378 api_trace (aTHX_ coro_current, 0);
2379
2380 frame->prepare = prepare_schedule;
2381 av_push (av_async_pool, SvREFCNT_inc (hv));
2382 }
2383 }
2384 else
825 } 2385 {
2386 /* first iteration, simply fall through */
2387 frame->prepare = prepare_nop;
2388 }
826 2389
827 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2390 frame->check = slf_check_pool_handler;
2391 frame->data = (void *)coro;
2392}
2393
2394/*****************************************************************************/
2395/* rouse callback */
2396
2397#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2398
2399static void
2400coro_rouse_callback (pTHX_ CV *cv)
2401{
2402 dXSARGS;
2403 SV *data = (SV *)S_GENSUB_ARG;
2404
2405 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2406 {
2407 /* first call, set args */
2408 SV *coro = SvRV (data);
2409 AV *av = newAV ();
2410
2411 SvRV_set (data, (SV *)av);
2412
2413 /* better take a full copy of the arguments */
2414 while (items--)
2415 av_store (av, items, newSVsv (ST (items)));
2416
2417 api_ready (aTHX_ coro);
2418 SvREFCNT_dec (coro);
2419 }
2420
2421 XSRETURN_EMPTY;
2422}
2423
2424static int
2425slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2426{
2427 SV *data = (SV *)frame->data;
2428
2429 if (CORO_THROW)
2430 return 0;
2431
2432 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2433 return 1;
2434
2435 /* now push all results on the stack */
2436 {
2437 dSP;
2438 AV *av = (AV *)SvRV (data);
2439 int i;
2440
2441 EXTEND (SP, AvFILLp (av) + 1);
2442 for (i = 0; i <= AvFILLp (av); ++i)
2443 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2444
2445 /* we have stolen the elements, so set length to zero and free */
2446 AvFILLp (av) = -1;
2447 av_undef (av);
2448
2449 PUTBACK;
2450 }
2451
2452 return 0;
2453}
2454
2455static void
2456slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2457{
2458 SV *cb;
2459
2460 if (items)
2461 cb = arg [0];
2462 else
2463 {
2464 struct coro *coro = SvSTATE_current;
2465
2466 if (!coro->rouse_cb)
2467 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2468
2469 cb = sv_2mortal (coro->rouse_cb);
2470 coro->rouse_cb = 0;
2471 }
2472
2473 if (!SvROK (cb)
2474 || SvTYPE (SvRV (cb)) != SVt_PVCV
2475 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2476 croak ("Coro::rouse_wait called with illegal callback argument,");
2477
2478 {
2479 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2480 SV *data = (SV *)S_GENSUB_ARG;
2481
2482 frame->data = (void *)data;
2483 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2484 frame->check = slf_check_rouse_wait;
2485 }
828} 2486}
829 2487
830static SV * 2488static SV *
831coro_deq (int min_prio) 2489coro_new_rouse_cb (pTHX)
832{ 2490{
833 int prio = PRIO_MAX - PRIO_MIN; 2491 HV *hv = (HV *)SvRV (coro_current);
2492 struct coro *coro = SvSTATE_hv (hv);
2493 SV *data = newRV_inc ((SV *)hv);
2494 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
834 2495
835 min_prio -= PRIO_MIN; 2496 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
836 if (min_prio < 0) 2497 SvREFCNT_dec (data); /* magicext increases the refcount */
837 min_prio = 0;
838 2498
839 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2499 SvREFCNT_dec (coro->rouse_cb);
840 if (av_len (coro_ready[prio]) >= 0) 2500 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2501
2502 return cb;
2503}
2504
2505/*****************************************************************************/
2506/* schedule-like-function opcode (SLF) */
2507
2508static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2509static const CV *slf_cv;
2510static SV **slf_argv;
2511static int slf_argc, slf_arga; /* count, allocated */
2512static I32 slf_ax; /* top of stack, for restore */
2513
2514/* this restores the stack in the case we patched the entersub, to */
2515/* recreate the stack frame as perl will on following calls */
2516/* since entersub cleared the stack */
2517static OP *
2518pp_restore (pTHX)
2519{
2520 int i;
2521 SV **SP = PL_stack_base + slf_ax;
2522
2523 PUSHMARK (SP);
2524
2525 EXTEND (SP, slf_argc + 1);
2526
2527 for (i = 0; i < slf_argc; ++i)
2528 PUSHs (sv_2mortal (slf_argv [i]));
2529
2530 PUSHs ((SV *)CvGV (slf_cv));
2531
2532 RETURNOP (slf_restore.op_first);
2533}
2534
2535static void
2536slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2537{
2538 SV **arg = (SV **)slf_frame.data;
2539
2540 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2541}
2542
2543static void
2544slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2545{
2546 if (items != 2)
2547 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2548
2549 frame->prepare = slf_prepare_transfer;
2550 frame->check = slf_check_nop;
2551 frame->data = (void *)arg; /* let's hope it will stay valid */
2552}
2553
2554static void
2555slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2556{
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_nop;
2559}
2560
2561static void
2562slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2563{
2564 struct coro *next = (struct coro *)slf_frame.data;
2565
2566 SvREFCNT_inc_NN (next->hv);
2567 prepare_schedule_to (aTHX_ ta, next);
2568}
2569
2570static void
2571slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2572{
2573 if (!items)
2574 croak ("Coro::schedule_to expects a coroutine argument, caught");
2575
2576 frame->data = (void *)SvSTATE (arg [0]);
2577 frame->prepare = slf_prepare_schedule_to;
2578 frame->check = slf_check_nop;
2579}
2580
2581static void
2582slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 api_ready (aTHX_ SvRV (coro_current));
2585
2586 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2587}
2588
2589static void
2590slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_cede;
2593 frame->check = slf_check_nop;
2594}
2595
2596static void
2597slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2598{
2599 frame->prepare = prepare_cede_notself;
2600 frame->check = slf_check_nop;
2601}
2602
2603/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2604static void
2605slf_destroy (pTHX_ struct coro *coro)
2606{
2607 struct CoroSLF frame = coro->slf_frame;
2608
2609 /*
2610 * The on_destroy below most likely is from an SLF call.
2611 * Since by definition the SLF call will not finish when we destroy
2612 * the coro, we will have to force-finish it here, otherwise
2613 * cleanup functions cannot call SLF functions.
2614 */
2615 coro->slf_frame.prepare = 0;
2616
2617 /* this callback is reserved for slf functions needing to do cleanup */
2618 if (frame.destroy && frame.prepare && !PL_dirty)
2619 frame.destroy (aTHX_ &frame);
2620}
2621
2622/*
2623 * these not obviously related functions are all rolled into one
2624 * function to increase chances that they all will call transfer with the same
2625 * stack offset
2626 * SLF stands for "schedule-like-function".
2627 */
2628static OP *
2629pp_slf (pTHX)
2630{
2631 I32 checkmark; /* mark SP to see how many elements check has pushed */
2632
2633 /* set up the slf frame, unless it has already been set-up */
2634 /* the latter happens when a new coro has been started */
2635 /* or when a new cctx was attached to an existing coroutine */
2636 if (ecb_expect_true (!slf_frame.prepare))
2637 {
2638 /* first iteration */
2639 dSP;
2640 SV **arg = PL_stack_base + TOPMARK + 1;
2641 int items = SP - arg; /* args without function object */
2642 SV *gv = *sp;
2643
2644 /* do a quick consistency check on the "function" object, and if it isn't */
2645 /* for us, divert to the real entersub */
2646 if (SvTYPE (gv) != SVt_PVGV
2647 || !GvCV (gv)
2648 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2649 return PL_ppaddr[OP_ENTERSUB](aTHX);
2650
2651 if (!(PL_op->op_flags & OPf_STACKED))
841 { 2652 {
842 coro_nready--; 2653 /* ampersand-form of call, use @_ instead of stack */
843 return av_shift (coro_ready[prio]); 2654 AV *av = GvAV (PL_defgv);
2655 arg = AvARRAY (av);
2656 items = AvFILLp (av) + 1;
844 } 2657 }
2658
2659 /* now call the init function, which needs to set up slf_frame */
2660 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2661 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2662
2663 /* pop args */
2664 SP = PL_stack_base + POPMARK;
2665
2666 PUTBACK;
2667 }
2668
2669 /* now that we have a slf_frame, interpret it! */
2670 /* we use a callback system not to make the code needlessly */
2671 /* complicated, but so we can run multiple perl coros from one cctx */
2672
2673 do
2674 {
2675 struct coro_transfer_args ta;
2676
2677 slf_frame.prepare (aTHX_ &ta);
2678 TRANSFER (ta, 0);
2679
2680 checkmark = PL_stack_sp - PL_stack_base;
2681 }
2682 while (slf_frame.check (aTHX_ &slf_frame));
2683
2684 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2685
2686 /* exception handling */
2687 if (ecb_expect_false (CORO_THROW))
2688 {
2689 SV *exception = sv_2mortal (CORO_THROW);
2690
2691 CORO_THROW = 0;
2692 sv_setsv (ERRSV, exception);
2693 croak (0);
2694 }
2695
2696 /* return value handling - mostly like entersub */
2697 /* make sure we put something on the stack in scalar context */
2698 if (GIMME_V == G_SCALAR
2699 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2700 {
2701 dSP;
2702 SV **bot = PL_stack_base + checkmark;
2703
2704 if (sp == bot) /* too few, push undef */
2705 bot [1] = &PL_sv_undef;
2706 else /* too many, take last one */
2707 bot [1] = *sp;
2708
2709 SP = bot + 1;
2710
2711 PUTBACK;
2712 }
2713
2714 return NORMAL;
2715}
2716
2717static void
2718api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2719{
2720 int i;
2721 SV **arg = PL_stack_base + ax;
2722 int items = PL_stack_sp - arg + 1;
2723
2724 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2725
2726 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2727 && PL_op->op_ppaddr != pp_slf)
2728 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2729
2730 CvFLAGS (cv) |= CVf_SLF;
2731 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2732 slf_cv = cv;
2733
2734 /* we patch the op, and then re-run the whole call */
2735 /* we have to put the same argument on the stack for this to work */
2736 /* and this will be done by pp_restore */
2737 slf_restore.op_next = (OP *)&slf_restore;
2738 slf_restore.op_type = OP_CUSTOM;
2739 slf_restore.op_ppaddr = pp_restore;
2740 slf_restore.op_first = PL_op;
2741
2742 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2743
2744 if (PL_op->op_flags & OPf_STACKED)
2745 {
2746 if (items > slf_arga)
2747 {
2748 slf_arga = items;
2749 Safefree (slf_argv);
2750 New (0, slf_argv, slf_arga, SV *);
2751 }
2752
2753 slf_argc = items;
2754
2755 for (i = 0; i < items; ++i)
2756 slf_argv [i] = SvREFCNT_inc (arg [i]);
2757 }
2758 else
2759 slf_argc = 0;
2760
2761 PL_op->op_ppaddr = pp_slf;
2762 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2763
2764 PL_op = (OP *)&slf_restore;
2765}
2766
2767/*****************************************************************************/
2768/* dynamic wind */
2769
2770static void
2771on_enterleave_call (pTHX_ SV *cb)
2772{
2773 dSP;
2774
2775 PUSHSTACK;
2776
2777 PUSHMARK (SP);
2778 PUTBACK;
2779 call_sv (cb, G_VOID | G_DISCARD);
2780 SPAGAIN;
2781
2782 POPSTACK;
2783}
2784
2785static SV *
2786coro_avp_pop_and_free (pTHX_ AV **avp)
2787{
2788 AV *av = *avp;
2789 SV *res = av_pop (av);
2790
2791 if (AvFILLp (av) < 0)
2792 {
2793 *avp = 0;
2794 SvREFCNT_dec (av);
2795 }
2796
2797 return res;
2798}
2799
2800static void
2801coro_pop_on_enter (pTHX_ void *coro)
2802{
2803 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2804 SvREFCNT_dec (cb);
2805}
2806
2807static void
2808coro_pop_on_leave (pTHX_ void *coro)
2809{
2810 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2811 on_enterleave_call (aTHX_ sv_2mortal (cb));
2812}
2813
2814/*****************************************************************************/
2815/* PerlIO::cede */
2816
2817typedef struct
2818{
2819 PerlIOBuf base;
2820 NV next, every;
2821} PerlIOCede;
2822
2823static IV ecb_cold
2824PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2825{
2826 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2827
2828 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2829 self->next = nvtime () + self->every;
2830
2831 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2832}
2833
2834static SV * ecb_cold
2835PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2836{
2837 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2838
2839 return newSVnv (self->every);
2840}
2841
2842static IV
2843PerlIOCede_flush (pTHX_ PerlIO *f)
2844{
2845 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2846 double now = nvtime ();
2847
2848 if (now >= self->next)
2849 {
2850 api_cede (aTHX);
2851 self->next = now + self->every;
2852 }
2853
2854 return PerlIOBuf_flush (aTHX_ f);
2855}
2856
2857static PerlIO_funcs PerlIO_cede =
2858{
2859 sizeof(PerlIO_funcs),
2860 "cede",
2861 sizeof(PerlIOCede),
2862 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2863 PerlIOCede_pushed,
2864 PerlIOBuf_popped,
2865 PerlIOBuf_open,
2866 PerlIOBase_binmode,
2867 PerlIOCede_getarg,
2868 PerlIOBase_fileno,
2869 PerlIOBuf_dup,
2870 PerlIOBuf_read,
2871 PerlIOBuf_unread,
2872 PerlIOBuf_write,
2873 PerlIOBuf_seek,
2874 PerlIOBuf_tell,
2875 PerlIOBuf_close,
2876 PerlIOCede_flush,
2877 PerlIOBuf_fill,
2878 PerlIOBase_eof,
2879 PerlIOBase_error,
2880 PerlIOBase_clearerr,
2881 PerlIOBase_setlinebuf,
2882 PerlIOBuf_get_base,
2883 PerlIOBuf_bufsiz,
2884 PerlIOBuf_get_ptr,
2885 PerlIOBuf_get_cnt,
2886 PerlIOBuf_set_ptrcnt,
2887};
2888
2889/*****************************************************************************/
2890/* Coro::Semaphore & Coro::Signal */
2891
2892static SV *
2893coro_waitarray_new (pTHX_ int count)
2894{
2895 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2896 AV *av = newAV ();
2897 SV **ary;
2898
2899 /* unfortunately, building manually saves memory */
2900 Newx (ary, 2, SV *);
2901 AvALLOC (av) = ary;
2902#if PERL_VERSION_ATLEAST (5,10,0)
2903 AvARRAY (av) = ary;
2904#else
2905 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2906 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2907 SvPVX ((SV *)av) = (char *)ary;
2908#endif
2909 AvMAX (av) = 1;
2910 AvFILLp (av) = 0;
2911 ary [0] = newSViv (count);
2912
2913 return newRV_noinc ((SV *)av);
2914}
2915
2916/* semaphore */
2917
2918static void
2919coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2920{
2921 SV *count_sv = AvARRAY (av)[0];
2922 IV count = SvIVX (count_sv);
2923
2924 count += adjust;
2925 SvIVX (count_sv) = count;
2926
2927 /* now wake up as many waiters as are expected to lock */
2928 while (count > 0 && AvFILLp (av) > 0)
2929 {
2930 SV *cb;
2931
2932 /* swap first two elements so we can shift a waiter */
2933 AvARRAY (av)[0] = AvARRAY (av)[1];
2934 AvARRAY (av)[1] = count_sv;
2935 cb = av_shift (av);
2936
2937 if (SvOBJECT (cb))
2938 {
2939 api_ready (aTHX_ cb);
2940 --count;
2941 }
2942 else if (SvTYPE (cb) == SVt_PVCV)
2943 {
2944 dSP;
2945 PUSHMARK (SP);
2946 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2947 PUTBACK;
2948 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2949 }
2950
2951 SvREFCNT_dec (cb);
2952 }
2953}
2954
2955static void
2956coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2957{
2958 /* call $sem->adjust (0) to possibly wake up some other waiters */
2959 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2960}
2961
2962static int
2963slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2964{
2965 AV *av = (AV *)frame->data;
2966 SV *count_sv = AvARRAY (av)[0];
2967 SV *coro_hv = SvRV (coro_current);
2968
2969 frame->destroy = 0;
2970
2971 /* if we are about to throw, don't actually acquire the lock, just throw */
2972 if (ecb_expect_false (CORO_THROW))
2973 {
2974 /* we still might be responsible for the semaphore, so wake up others */
2975 coro_semaphore_adjust (aTHX_ av, 0);
2976
2977 return 0;
2978 }
2979 else if (SvIVX (count_sv) > 0)
2980 {
2981 if (acquire)
2982 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2983 else
2984 coro_semaphore_adjust (aTHX_ av, 0);
2985
2986 return 0;
2987 }
2988 else
2989 {
2990 int i;
2991 /* if we were woken up but can't down, we look through the whole */
2992 /* waiters list and only add us if we aren't in there already */
2993 /* this avoids some degenerate memory usage cases */
2994 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2995 if (AvARRAY (av)[i] == coro_hv)
2996 return 1;
2997
2998 av_push (av, SvREFCNT_inc (coro_hv));
2999 return 1;
3000 }
3001}
3002
3003static int
3004slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3005{
3006 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3007}
3008
3009static int
3010slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3011{
3012 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3013}
3014
3015static void
3016slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3017{
3018 AV *av = (AV *)SvRV (arg [0]);
3019
3020 if (SvIVX (AvARRAY (av)[0]) > 0)
3021 {
3022 frame->data = (void *)av;
3023 frame->prepare = prepare_nop;
3024 }
3025 else
3026 {
3027 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3028
3029 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3030 frame->prepare = prepare_schedule;
3031 /* to avoid race conditions when a woken-up coro gets terminated */
3032 /* we arrange for a temporary on_destroy that calls adjust (0) */
3033 frame->destroy = coro_semaphore_destroy;
3034 }
3035}
3036
3037static void
3038slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3039{
3040 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3041 frame->check = slf_check_semaphore_down;
3042}
3043
3044static void
3045slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3046{
3047 if (items >= 2)
3048 {
3049 /* callback form */
3050 AV *av = (AV *)SvRV (arg [0]);
3051 SV *cb_cv = s_get_cv_croak (arg [1]);
3052
3053 av_push (av, SvREFCNT_inc_NN (cb_cv));
3054
3055 if (SvIVX (AvARRAY (av)[0]) > 0)
3056 coro_semaphore_adjust (aTHX_ av, 0);
3057
3058 frame->prepare = prepare_nop;
3059 frame->check = slf_check_nop;
3060 }
3061 else
3062 {
3063 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3064 frame->check = slf_check_semaphore_wait;
3065 }
3066}
3067
3068/* signal */
3069
3070static void
3071coro_signal_wake (pTHX_ AV *av, int count)
3072{
3073 SvIVX (AvARRAY (av)[0]) = 0;
3074
3075 /* now signal count waiters */
3076 while (count > 0 && AvFILLp (av) > 0)
3077 {
3078 SV *cb;
3079
3080 /* swap first two elements so we can shift a waiter */
3081 cb = AvARRAY (av)[0];
3082 AvARRAY (av)[0] = AvARRAY (av)[1];
3083 AvARRAY (av)[1] = cb;
3084
3085 cb = av_shift (av);
3086
3087 if (SvTYPE (cb) == SVt_PVCV)
3088 {
3089 dSP;
3090 PUSHMARK (SP);
3091 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3092 PUTBACK;
3093 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3094 }
3095 else
3096 {
3097 api_ready (aTHX_ cb);
3098 sv_setiv (cb, 0); /* signal waiter */
3099 }
3100
3101 SvREFCNT_dec (cb);
3102
3103 --count;
3104 }
3105}
3106
3107static int
3108slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3109{
3110 /* if we are about to throw, also stop waiting */
3111 return SvROK ((SV *)frame->data) && !CORO_THROW;
3112}
3113
3114static void
3115slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3116{
3117 AV *av = (AV *)SvRV (arg [0]);
3118
3119 if (items >= 2)
3120 {
3121 SV *cb_cv = s_get_cv_croak (arg [1]);
3122 av_push (av, SvREFCNT_inc_NN (cb_cv));
3123
3124 if (SvIVX (AvARRAY (av)[0]))
3125 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3126
3127 frame->prepare = prepare_nop;
3128 frame->check = slf_check_nop;
3129 }
3130 else if (SvIVX (AvARRAY (av)[0]))
3131 {
3132 SvIVX (AvARRAY (av)[0]) = 0;
3133 frame->prepare = prepare_nop;
3134 frame->check = slf_check_nop;
3135 }
3136 else
3137 {
3138 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3139
3140 av_push (av, waiter);
3141
3142 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3143 frame->prepare = prepare_schedule;
3144 frame->check = slf_check_signal_wait;
3145 }
3146}
3147
3148/*****************************************************************************/
3149/* Coro::AIO */
3150
3151#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3152
3153/* helper storage struct */
3154struct io_state
3155{
3156 int errorno;
3157 I32 laststype; /* U16 in 5.10.0 */
3158 int laststatval;
3159 Stat_t statcache;
3160};
3161
3162static void
3163coro_aio_callback (pTHX_ CV *cv)
3164{
3165 dXSARGS;
3166 AV *state = (AV *)S_GENSUB_ARG;
3167 SV *coro = av_pop (state);
3168 SV *data_sv = newSV (sizeof (struct io_state));
3169
3170 av_extend (state, items - 1);
3171
3172 sv_upgrade (data_sv, SVt_PV);
3173 SvCUR_set (data_sv, sizeof (struct io_state));
3174 SvPOK_only (data_sv);
3175
3176 {
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 data->errorno = errno;
3180 data->laststype = PL_laststype;
3181 data->laststatval = PL_laststatval;
3182 data->statcache = PL_statcache;
3183 }
3184
3185 /* now build the result vector out of all the parameters and the data_sv */
3186 {
3187 int i;
3188
3189 for (i = 0; i < items; ++i)
3190 av_push (state, SvREFCNT_inc_NN (ST (i)));
3191 }
3192
3193 av_push (state, data_sv);
3194
3195 api_ready (aTHX_ coro);
3196 SvREFCNT_dec (coro);
3197 SvREFCNT_dec ((AV *)state);
3198}
3199
3200static int
3201slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3202{
3203 AV *state = (AV *)frame->data;
3204
3205 /* if we are about to throw, return early */
3206 /* this does not cancel the aio request, but at least */
3207 /* it quickly returns */
3208 if (CORO_THROW)
3209 return 0;
3210
3211 /* one element that is an RV? repeat! */
3212 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3213 return 1;
3214
3215 /* restore status */
3216 {
3217 SV *data_sv = av_pop (state);
3218 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3219
3220 errno = data->errorno;
3221 PL_laststype = data->laststype;
3222 PL_laststatval = data->laststatval;
3223 PL_statcache = data->statcache;
3224
3225 SvREFCNT_dec (data_sv);
3226 }
3227
3228 /* push result values */
3229 {
3230 dSP;
3231 int i;
3232
3233 EXTEND (SP, AvFILLp (state) + 1);
3234 for (i = 0; i <= AvFILLp (state); ++i)
3235 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3236
3237 PUTBACK;
3238 }
845 3239
846 return 0; 3240 return 0;
847} 3241}
848 3242
849static void 3243static void
850api_ready (SV *coro) 3244slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
851{ 3245{
852 coro_enq (SvREFCNT_inc (coro)); 3246 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
853} 3247 SV *coro_hv = SvRV (coro_current);
3248 struct coro *coro = SvSTATE_hv (coro_hv);
854 3249
855static void 3250 /* put our coroutine id on the state arg */
856api_schedule (int cede) 3251 av_push (state, SvREFCNT_inc_NN (coro_hv));
857{
858 SV *prev, *next;
859 3252
860 prev = GvSV (coro_current); 3253 /* first see whether we have a non-zero priority and set it as AIO prio */
3254 if (coro->prio)
3255 {
3256 dSP;
861 3257
862 if (cede) 3258 static SV *prio_cv;
863 coro_enq (SvREFCNT_inc (prev)); 3259 static SV *prio_sv;
864 3260
865 next = coro_deq (PRIO_MIN); 3261 if (ecb_expect_false (!prio_cv))
3262 {
3263 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3264 prio_sv = newSViv (0);
3265 }
866 3266
867 if (!next) 3267 PUSHMARK (SP);
868 next = SvREFCNT_inc (GvSV (coro_idle)); 3268 sv_setiv (prio_sv, coro->prio);
3269 XPUSHs (prio_sv);
869 3270
870 GvSV (coro_current) = SvREFCNT_inc (next); 3271 PUTBACK;
871 transfer (aTHX_ 3272 call_sv (prio_cv, G_VOID | G_DISCARD);
872 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3273 }
873 sv_to_coro (next, "Coro::schedule", "next coroutine"),
874 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875 SvREFCNT_dec (next);
876 SvREFCNT_dec (prev);
877}
878 3274
3275 /* now call the original request */
3276 {
3277 dSP;
3278 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3279 int i;
3280
3281 PUSHMARK (SP);
3282
3283 /* first push all args to the stack */
3284 EXTEND (SP, items + 1);
3285
3286 for (i = 0; i < items; ++i)
3287 PUSHs (arg [i]);
3288
3289 /* now push the callback closure */
3290 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3291
3292 /* now call the AIO function - we assume our request is uncancelable */
3293 PUTBACK;
3294 call_sv ((SV *)req, G_VOID | G_DISCARD);
3295 }
3296
3297 /* now that the request is going, we loop till we have a result */
3298 frame->data = (void *)state;
3299 frame->prepare = prepare_schedule;
3300 frame->check = slf_check_aio_req;
3301}
3302
3303static void
3304coro_aio_req_xs (pTHX_ CV *cv)
3305{
3306 dXSARGS;
3307
3308 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3309
3310 XSRETURN_EMPTY;
3311}
3312
3313/*****************************************************************************/
3314
3315#if CORO_CLONE
3316# include "clone.c"
3317#endif
3318
3319/*****************************************************************************/
3320
3321static SV *
3322coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3323{
3324 SV *coro_sv;
3325 struct coro *coro;
3326 MAGIC *mg;
3327 HV *hv;
3328 SV *cb;
3329 int i;
3330
3331 if (argc > 0)
3332 {
3333 cb = s_get_cv_croak (argv [0]);
3334
3335 if (!is_coro)
3336 {
3337 if (CvISXSUB (cb))
3338 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3339
3340 if (!CvROOT (cb))
3341 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3342 }
3343 }
3344
3345 Newz (0, coro, 1, struct coro);
3346 coro->args = newAV ();
3347 coro->flags = CF_NEW;
3348
3349 if (coro_first) coro_first->prev = coro;
3350 coro->next = coro_first;
3351 coro_first = coro;
3352
3353 coro->hv = hv = newHV ();
3354 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3355 mg->mg_flags |= MGf_DUP;
3356 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3357
3358 if (argc > 0)
3359 {
3360 av_extend (coro->args, argc + is_coro - 1);
3361
3362 if (is_coro)
3363 {
3364 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3365 cb = (SV *)cv_coro_run;
3366 }
3367
3368 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3369
3370 for (i = 1; i < argc; i++)
3371 av_push (coro->args, newSVsv (argv [i]));
3372 }
3373
3374 return coro_sv;
3375}
3376
3377#ifndef __cplusplus
3378ecb_cold XS(boot_Coro__State);
3379#endif
3380
3381#if CORO_JIT
3382
3383static void ecb_noinline ecb_cold
3384pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3385{
3386 dSP;
3387 AV *av = newAV ();
3388
3389 av_store (av, 3, newSVuv (d));
3390 av_store (av, 2, newSVuv (c));
3391 av_store (av, 1, newSVuv (b));
3392 av_store (av, 0, newSVuv (a));
3393
3394 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3395
3396 PUTBACK;
3397}
3398
3399static void ecb_noinline ecb_cold
3400jit_init (pTHX)
3401{
3402 dSP;
3403 SV *load, *save;
3404 char *map_base;
3405 char *load_ptr, *save_ptr;
3406 STRLEN load_len, save_len, map_len;
3407 int count;
3408
3409 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3410
3411 PUSHMARK (SP);
3412 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3413 #include "state.h"
3414 count = call_pv ("Coro::State::_jit", G_ARRAY);
3415 SPAGAIN;
3416
3417 save = POPs; save_ptr = SvPVbyte (save, save_len);
3418 load = POPs; load_ptr = SvPVbyte (load, load_len);
3419
3420 map_len = load_len + save_len + 16;
3421
3422 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3423
3424 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3425
3426 load_perl_slots = (load_save_perl_slots_type)map_base;
3427 memcpy (map_base, load_ptr, load_len);
3428
3429 map_base += (load_len + 15) & ~15;
3430
3431 save_perl_slots = (load_save_perl_slots_type)map_base;
3432 memcpy (map_base, save_ptr, save_len);
3433
3434 /* we are good citizens and try to make the page read-only, so the evil evil */
3435 /* hackers might have it a bit more difficult */
3436 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3437
3438 PUTBACK;
3439 eval_pv ("undef &Coro::State::_jit", 1);
3440}
3441
3442#endif
3443
879MODULE = Coro::State PACKAGE = Coro::State 3444MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
880 3445
881PROTOTYPES: ENABLE 3446PROTOTYPES: DISABLE
882 3447
883BOOT: 3448BOOT:
884{ /* {} necessary for stoopid perl-5.6.x */ 3449{
885 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3450#ifdef USE_ITHREADS
886 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3451# if CORO_PTHREAD
3452 coro_thx = PERL_GET_CONTEXT;
3453# endif
3454#endif
3455 /* perl defines these to check for existance first, but why it doesn't */
3456 /* just create them one at init time is not clear to me, except for */
3457 /* programs trying to delete them, but... */
3458 /* anyway, we declare this as invalid and make sure they are initialised here */
3459 DEFSV;
3460 ERRSV;
3461
3462 cctx_current = cctx_new_empty ();
3463
3464 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3465 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3466
3467 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3468 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3469 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3470
3471 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3472 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3473 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3474
887 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3475 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
888 3476
889 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3477 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
890 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3478 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
891 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3479 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
892 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3480 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
893
894 if (!padlist_cache)
895 padlist_cache = newHV ();
896 3481
897 main_mainstack = PL_mainstack; 3482 main_mainstack = PL_mainstack;
3483 main_top_env = PL_top_env;
898 3484
3485 while (main_top_env->je_prev)
3486 main_top_env = main_top_env->je_prev;
3487
3488 {
3489 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3490
3491 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3492 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3493
3494 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3495 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3496 }
3497
899 coroapi.ver = CORO_API_VERSION; 3498 coroapi.ver = CORO_API_VERSION;
3499 coroapi.rev = CORO_API_REVISION;
3500
900 coroapi.transfer = api_transfer; 3501 coroapi.transfer = api_transfer;
901}
902 3502
903Coro::State 3503 coroapi.sv_state = SvSTATE_;
904_newprocess(args) 3504 coroapi.execute_slf = api_execute_slf;
905 SV * args 3505 coroapi.prepare_nop = prepare_nop;
3506 coroapi.prepare_schedule = prepare_schedule;
3507 coroapi.prepare_cede = prepare_cede;
3508 coroapi.prepare_cede_notself = prepare_cede_notself;
3509
3510 time_init (aTHX);
3511
3512 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3513#if CORO_JIT
3514 PUTBACK;
3515 jit_init (aTHX);
3516 SPAGAIN;
3517#endif
3518}
3519
3520SV *
3521new (SV *klass, ...)
3522 ALIAS:
3523 Coro::new = 1
3524 CODE:
3525 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3526 OUTPUT:
3527 RETVAL
3528
3529void
3530transfer (...)
3531 PROTOTYPE: $$
3532 CODE:
3533 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3534
3535SV *
3536clone (Coro::State coro)
3537 CODE:
3538{
3539#if CORO_CLONE
3540 struct coro *ncoro = coro_clone (aTHX_ coro);
3541 MAGIC *mg;
3542 /* TODO: too much duplication */
3543 ncoro->hv = newHV ();
3544 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3545 mg->mg_flags |= MGf_DUP;
3546 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3547#else
3548 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3549#endif
3550}
3551 OUTPUT:
3552 RETVAL
3553
3554int
3555cctx_stacksize (int new_stacksize = 0)
3556 PROTOTYPE: ;$
3557 CODE:
3558 RETVAL = cctx_stacksize;
3559 if (new_stacksize)
3560 {
3561 cctx_stacksize = new_stacksize;
3562 ++cctx_gen;
3563 }
3564 OUTPUT:
3565 RETVAL
3566
3567int
3568cctx_max_idle (int max_idle = 0)
3569 PROTOTYPE: ;$
3570 CODE:
3571 RETVAL = cctx_max_idle;
3572 if (max_idle > 1)
3573 cctx_max_idle = max_idle;
3574 OUTPUT:
3575 RETVAL
3576
3577int
3578cctx_count ()
3579 PROTOTYPE:
3580 CODE:
3581 RETVAL = cctx_count;
3582 OUTPUT:
3583 RETVAL
3584
3585int
3586cctx_idle ()
3587 PROTOTYPE:
3588 CODE:
3589 RETVAL = cctx_idle;
3590 OUTPUT:
3591 RETVAL
3592
3593void
3594list ()
3595 PROTOTYPE:
3596 PPCODE:
3597{
3598 struct coro *coro;
3599 for (coro = coro_first; coro; coro = coro->next)
3600 if (coro->hv)
3601 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3602}
3603
3604void
3605call (Coro::State coro, SV *coderef)
3606 ALIAS:
3607 eval = 1
3608 CODE:
3609{
3610 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3611 {
3612 struct coro *current = SvSTATE_current;
3613 struct CoroSLF slf_save;
3614
3615 if (current != coro)
3616 {
3617 PUTBACK;
3618 save_perl (aTHX_ current);
3619 load_perl (aTHX_ coro);
3620 /* the coro is most likely in an active SLF call.
3621 * while not strictly required (the code we execute is
3622 * not allowed to call any SLF functions), it's cleaner
3623 * to reinitialise the slf_frame and restore it later.
3624 * This might one day allow us to actually do SLF calls
3625 * from code executed here.
3626 */
3627 slf_save = slf_frame;
3628 slf_frame.prepare = 0;
3629 SPAGAIN;
3630 }
3631
3632 PUSHSTACK;
3633
3634 PUSHMARK (SP);
3635 PUTBACK;
3636
3637 if (ix)
3638 eval_sv (coderef, 0);
3639 else
3640 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3641
3642 POPSTACK;
3643 SPAGAIN;
3644
3645 if (current != coro)
3646 {
3647 PUTBACK;
3648 slf_frame = slf_save;
3649 save_perl (aTHX_ coro);
3650 load_perl (aTHX_ current);
3651 SPAGAIN;
3652 }
3653 }
3654}
3655
3656SV *
3657is_ready (Coro::State coro)
906 PROTOTYPE: $ 3658 PROTOTYPE: $
3659 ALIAS:
3660 is_ready = CF_READY
3661 is_running = CF_RUNNING
3662 is_new = CF_NEW
3663 is_destroyed = CF_ZOMBIE
3664 is_zombie = CF_ZOMBIE
3665 is_suspended = CF_SUSPENDED
3666 CODE:
3667 RETVAL = boolSV (coro->flags & ix);
3668 OUTPUT:
3669 RETVAL
3670
3671void
3672throw (SV *self, SV *exception = &PL_sv_undef)
3673 PROTOTYPE: $;$
907 CODE: 3674 CODE:
908 Coro__State coro; 3675{
3676 struct coro *coro = SvSTATE (self);
3677 struct coro *current = SvSTATE_current;
3678 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3679 SvREFCNT_dec (*exceptionp);
3680 SvGETMAGIC (exception);
3681 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
909 3682
910 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3683 api_ready (aTHX_ self);
911 croak ("Coro::State::_newprocess expects an arrayref"); 3684}
3685
3686void
3687api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3688 PROTOTYPE: $;$
3689 C_ARGS: aTHX_ coro, flags
3690
3691SV *
3692has_cctx (Coro::State coro)
3693 PROTOTYPE: $
3694 CODE:
3695 /* maybe manage the running flag differently */
3696 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3697 OUTPUT:
3698 RETVAL
3699
3700int
3701is_traced (Coro::State coro)
3702 PROTOTYPE: $
3703 CODE:
3704 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3705 OUTPUT:
3706 RETVAL
3707
3708UV
3709rss (Coro::State coro)
3710 PROTOTYPE: $
3711 ALIAS:
3712 usecount = 1
3713 CODE:
3714 switch (ix)
3715 {
3716 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3717 case 1: RETVAL = coro->usecount; break;
912 3718 }
913 New (0, coro, 1, struct coro); 3719 OUTPUT:
914
915 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
916 coro->mainstack = 0; /* actual work is done inside transfer */
917 coro->stack = 0;
918
919 RETVAL = coro; 3720 RETVAL
3721
3722void
3723force_cctx ()
3724 PROTOTYPE:
3725 CODE:
3726 cctx_current->idle_sp = 0;
3727
3728void
3729swap_defsv (Coro::State self)
3730 PROTOTYPE: $
3731 ALIAS:
3732 swap_defav = 1
3733 CODE:
3734 if (!self->slot)
3735 croak ("cannot swap state with coroutine that has no saved state,");
3736 else
3737 {
3738 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3739 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3740
3741 SV *tmp = *src; *src = *dst; *dst = tmp;
3742 }
3743
3744void
3745cancel (Coro::State self)
3746 CODE:
3747 coro_state_destroy (aTHX_ self);
3748
3749SV *
3750enable_times (int enabled = enable_times)
3751 CODE:
3752{
3753 RETVAL = boolSV (enable_times);
3754
3755 if (enabled != enable_times)
3756 {
3757 enable_times = enabled;
3758
3759 coro_times_update ();
3760 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3761 }
3762}
920 OUTPUT: 3763 OUTPUT:
921 RETVAL 3764 RETVAL
922 3765
923void 3766void
924transfer(prev, next, flags) 3767times (Coro::State self)
925 Coro::State_or_hashref prev 3768 PPCODE:
926 Coro::State_or_hashref next 3769{
927 int flags 3770 struct coro *current = SvSTATE (coro_current);
928 PROTOTYPE: @ 3771
3772 if (ecb_expect_false (current == self))
3773 {
3774 coro_times_update ();
3775 coro_times_add (SvSTATE (coro_current));
3776 }
3777
3778 EXTEND (SP, 2);
3779 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3780 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3781
3782 if (ecb_expect_false (current == self))
3783 coro_times_sub (SvSTATE (coro_current));
3784}
3785
3786void
3787swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3788 CODE:
3789{
3790 struct coro *current = SvSTATE_current;
3791
3792 if (current == coro)
3793 SWAP_SVS (current);
3794
3795 if (!coro->swap_sv)
3796 coro->swap_sv = newAV ();
3797
3798 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3799 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3800
3801 if (current == coro)
3802 SWAP_SVS (current);
3803}
3804
3805
3806MODULE = Coro::State PACKAGE = Coro
3807
3808BOOT:
3809{
3810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3812 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3813 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3815 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3816 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3817 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3818
3819 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3820 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3821 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3822 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3823
3824 coro_stash = gv_stashpv ("Coro", TRUE);
3825
3826 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3827 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3828 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3829 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3830 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3831 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3832
3833 {
3834 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3835
3836 coroapi.schedule = api_schedule;
3837 coroapi.schedule_to = api_schedule_to;
3838 coroapi.cede = api_cede;
3839 coroapi.cede_notself = api_cede_notself;
3840 coroapi.ready = api_ready;
3841 coroapi.is_ready = api_is_ready;
3842 coroapi.nready = coro_nready;
3843 coroapi.current = coro_current;
3844
3845 /*GCoroAPI = &coroapi;*/
3846 sv_setiv (sv, (IV)&coroapi);
3847 SvREADONLY_on (sv);
3848 }
3849}
3850
3851SV *
3852async (...)
3853 PROTOTYPE: &@
929 CODE: 3854 CODE:
930 PUTBACK; 3855 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
931 transfer (aTHX_ prev, next, flags); 3856 api_ready (aTHX_ RETVAL);
932 SPAGAIN; 3857 OUTPUT:
3858 RETVAL
933 3859
934void 3860void
935DESTROY(coro) 3861_destroy (Coro::State coro)
936 Coro::State coro 3862 CODE:
937 CODE: 3863 /* used by the manager thread */
938 3864 coro_state_destroy (aTHX_ coro);
939 if (coro->mainstack && coro->mainstack != main_mainstack)
940 {
941 struct coro temp;
942
943 PUTBACK;
944 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
945 LOAD(aTHX_ coro);
946 SPAGAIN;
947
948 destroy_stacks (aTHX);
949
950 LOAD((&temp)); /* this will get rid of defsv etc.. */
951 SPAGAIN;
952
953 coro->mainstack = 0;
954 }
955
956 deallocate_stack (coro);
957
958 Safefree (coro);
959 3865
960void 3866void
961flush() 3867on_destroy (Coro::State coro, SV *cb)
962 CODE: 3868 CODE:
963#ifdef MAY_FLUSH 3869 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
964 flush_padlist_cache ();
965#endif
966 3870
967void 3871void
968_exit(code) 3872join (...)
969 int code 3873 CODE:
3874 CORO_EXECUTE_SLF_XS (slf_init_join);
3875
3876void
3877terminate (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3880
3881void
3882cancel (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3885
3886int
3887safe_cancel (Coro::State self, ...)
3888 C_ARGS: aTHX_ self, &ST (1), items - 1
3889
3890void
3891schedule (...)
3892 CODE:
3893 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3894
3895void
3896schedule_to (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3899
3900void
3901cede_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3904
3905void
3906cede (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede);
3909
3910void
3911cede_notself (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3914
3915void
3916_set_current (SV *current)
970 PROTOTYPE: $ 3917 PROTOTYPE: $
971 CODE: 3918 CODE:
972#if defined(__GLIBC__) || _POSIX_C_SOURCE 3919 SvREFCNT_dec (SvRV (coro_current));
973 _exit (code); 3920 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
974#else
975 signal (SIGTERM, SIG_DFL);
976 raise (SIGTERM);
977 exit (code);
978#endif
979
980MODULE = Coro::State PACKAGE = Coro::Cont
981
982# this is slightly dirty (should expose a c-level api)
983 3921
984void 3922void
985yield(...) 3923_set_readyhook (SV *hook)
986 PROTOTYPE: @ 3924 PROTOTYPE: $
987 CODE: 3925 CODE:
988 static SV *returnstk;
989 SV *sv;
990 AV *defav = GvAV (PL_defgv);
991 struct coro *prev, *next;
992
993 if (!returnstk)
994 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
995
996 /* set up @_ -- ugly */
997 av_clear (defav);
998 av_fill (defav, items - 1);
999 while (items--)
1000 av_store (defav, items, SvREFCNT_inc (ST(items)));
1001
1002 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1003 sv = av_pop ((AV *)SvRV (returnstk));
1004 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1005 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1006 SvREFCNT_dec (sv); 3926 SvREFCNT_dec (coro_readyhook);
1007 3927 SvGETMAGIC (hook);
1008 transfer(aTHX_ prev, next, 0); 3928 if (SvOK (hook))
1009 3929 {
1010MODULE = Coro::State PACKAGE = Coro
1011
1012# this is slightly dirty (should expose a c-level api)
1013
1014BOOT:
1015{
1016 int i;
1017 HV *stash = gv_stashpv ("Coro", TRUE);
1018
1019 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1020 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1021 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1022 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1023 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1024 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1025
1026 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1027 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1028
1029 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1030 coro_ready[i] = newAV (); 3930 coro_readyhook = newSVsv (hook);
1031 3931 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1032 {
1033 SV *sv = perl_get_sv("Coro::API", 1);
1034
1035 coroapi.schedule = api_schedule;
1036 coroapi.ready = api_ready;
1037 coroapi.nready = &coro_nready;
1038 coroapi.current = coro_current;
1039
1040 GCoroAPI = &coroapi;
1041 sv_setiv(sv, (IV)&coroapi);
1042 SvREADONLY_on(sv);
1043 } 3932 }
1044} 3933 else
3934 {
3935 coro_readyhook = 0;
3936 CORO_READYHOOK = 0;
3937 }
1045 3938
1046void 3939int
3940prio (Coro::State coro, int newprio = 0)
3941 PROTOTYPE: $;$
3942 ALIAS:
3943 nice = 1
3944 CODE:
3945{
3946 RETVAL = coro->prio;
3947
3948 if (items > 1)
3949 {
3950 if (ix)
3951 newprio = coro->prio - newprio;
3952
3953 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3954 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3955
3956 coro->prio = newprio;
3957 }
3958}
3959 OUTPUT:
3960 RETVAL
3961
3962SV *
1047ready(self) 3963ready (SV *self)
1048 SV * self
1049 PROTOTYPE: $ 3964 PROTOTYPE: $
1050 CODE: 3965 CODE:
1051 api_ready (self); 3966 RETVAL = boolSV (api_ready (aTHX_ self));
3967 OUTPUT:
3968 RETVAL
1052 3969
1053int 3970int
1054nready(...) 3971nready (...)
1055 PROTOTYPE: 3972 PROTOTYPE:
1056 CODE: 3973 CODE:
1057 RETVAL = coro_nready; 3974 RETVAL = coro_nready;
1058 OUTPUT: 3975 OUTPUT:
1059 RETVAL 3976 RETVAL
1060 3977
1061void 3978void
1062schedule(...) 3979suspend (Coro::State self)
1063 PROTOTYPE: 3980 PROTOTYPE: $
1064 ALIAS:
1065 cede = 1
1066 CODE: 3981 CODE:
1067 api_schedule (ix); 3982 self->flags |= CF_SUSPENDED;
1068 3983
3984void
3985resume (Coro::State self)
3986 PROTOTYPE: $
3987 CODE:
3988 self->flags &= ~CF_SUSPENDED;
3989
3990void
3991_pool_handler (...)
3992 CODE:
3993 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3994
3995void
3996async_pool (SV *cv, ...)
3997 PROTOTYPE: &@
3998 PPCODE:
3999{
4000 HV *hv = (HV *)av_pop (av_async_pool);
4001 AV *av = newAV ();
4002 SV *cb = ST (0);
4003 int i;
4004
4005 av_extend (av, items - 2);
4006 for (i = 1; i < items; ++i)
4007 av_push (av, SvREFCNT_inc_NN (ST (i)));
4008
4009 if ((SV *)hv == &PL_sv_undef)
4010 {
4011 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4012 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4013 SvREFCNT_dec (sv);
4014 }
4015
4016 {
4017 struct coro *coro = SvSTATE_hv (hv);
4018
4019 assert (!coro->invoke_cb);
4020 assert (!coro->invoke_av);
4021 coro->invoke_cb = SvREFCNT_inc (cb);
4022 coro->invoke_av = av;
4023 }
4024
4025 api_ready (aTHX_ (SV *)hv);
4026
4027 if (GIMME_V != G_VOID)
4028 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4029 else
4030 SvREFCNT_dec (hv);
4031}
4032
4033SV *
4034rouse_cb ()
4035 PROTOTYPE:
4036 CODE:
4037 RETVAL = coro_new_rouse_cb (aTHX);
4038 OUTPUT:
4039 RETVAL
4040
4041void
4042rouse_wait (...)
4043 PROTOTYPE: ;$
4044 PPCODE:
4045 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4046
4047void
4048on_enter (SV *block)
4049 ALIAS:
4050 on_leave = 1
4051 PROTOTYPE: &
4052 CODE:
4053{
4054 struct coro *coro = SvSTATE_current;
4055 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4056
4057 block = s_get_cv_croak (block);
4058
4059 if (!*avp)
4060 *avp = newAV ();
4061
4062 av_push (*avp, SvREFCNT_inc (block));
4063
4064 if (!ix)
4065 on_enterleave_call (aTHX_ block);
4066
4067 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4068 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4069 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4070}
4071
4072
4073MODULE = Coro::State PACKAGE = PerlIO::cede
4074
4075BOOT:
4076 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4077
4078
4079MODULE = Coro::State PACKAGE = Coro::Semaphore
4080
4081SV *
4082new (SV *klass, SV *count = 0)
4083 CODE:
4084{
4085 int semcnt = 1;
4086
4087 if (count)
4088 {
4089 SvGETMAGIC (count);
4090
4091 if (SvOK (count))
4092 semcnt = SvIV (count);
4093 }
4094
4095 RETVAL = sv_bless (
4096 coro_waitarray_new (aTHX_ semcnt),
4097 GvSTASH (CvGV (cv))
4098 );
4099}
4100 OUTPUT:
4101 RETVAL
4102
4103# helper for Coro::Channel and others
4104SV *
4105_alloc (int count)
4106 CODE:
4107 RETVAL = coro_waitarray_new (aTHX_ count);
4108 OUTPUT:
4109 RETVAL
4110
4111SV *
4112count (SV *self)
4113 CODE:
4114 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4115 OUTPUT:
4116 RETVAL
4117
4118void
4119up (SV *self, int adjust = 1)
4120 ALIAS:
4121 adjust = 1
4122 CODE:
4123 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4124
4125void
4126down (...)
4127 CODE:
4128 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4129
4130void
4131wait (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4134
4135void
4136try (SV *self)
4137 PPCODE:
4138{
4139 AV *av = (AV *)SvRV (self);
4140 SV *count_sv = AvARRAY (av)[0];
4141 IV count = SvIVX (count_sv);
4142
4143 if (count > 0)
4144 {
4145 --count;
4146 SvIVX (count_sv) = count;
4147 XSRETURN_YES;
4148 }
4149 else
4150 XSRETURN_NO;
4151}
4152
4153void
4154waiters (SV *self)
4155 PPCODE:
4156{
4157 AV *av = (AV *)SvRV (self);
4158 int wcount = AvFILLp (av) + 1 - 1;
4159
4160 if (GIMME_V == G_SCALAR)
4161 XPUSHs (sv_2mortal (newSViv (wcount)));
4162 else
4163 {
4164 int i;
4165 EXTEND (SP, wcount);
4166 for (i = 1; i <= wcount; ++i)
4167 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4168 }
4169}
4170
4171MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4172
4173void
4174_may_delete (SV *sem, int count, unsigned int extra_refs)
4175 PPCODE:
4176{
4177 AV *av = (AV *)SvRV (sem);
4178
4179 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4180 && AvFILLp (av) == 0 /* no waiters, just count */
4181 && SvIV (AvARRAY (av)[0]) == count)
4182 XSRETURN_YES;
4183
4184 XSRETURN_NO;
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::Signal
4188
4189SV *
4190new (SV *klass)
4191 CODE:
4192 RETVAL = sv_bless (
4193 coro_waitarray_new (aTHX_ 0),
4194 GvSTASH (CvGV (cv))
4195 );
4196 OUTPUT:
4197 RETVAL
4198
4199void
4200wait (...)
4201 CODE:
4202 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4203
4204void
4205broadcast (SV *self)
4206 CODE:
4207{
4208 AV *av = (AV *)SvRV (self);
4209 coro_signal_wake (aTHX_ av, AvFILLp (av));
4210}
4211
4212void
4213send (SV *self)
4214 CODE:
4215{
4216 AV *av = (AV *)SvRV (self);
4217
4218 if (AvFILLp (av))
4219 coro_signal_wake (aTHX_ av, 1);
4220 else
4221 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4222}
4223
4224IV
4225awaited (SV *self)
4226 CODE:
4227 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4228 OUTPUT:
4229 RETVAL
4230
4231
4232MODULE = Coro::State PACKAGE = Coro::AnyEvent
4233
4234BOOT:
4235 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4236
4237void
4238_schedule (...)
4239 CODE:
4240{
4241 static int incede;
4242
4243 api_cede_notself (aTHX);
4244
4245 ++incede;
4246 while (coro_nready >= incede && api_cede (aTHX))
4247 ;
4248
4249 sv_setsv (sv_activity, &PL_sv_undef);
4250 if (coro_nready >= incede)
4251 {
4252 PUSHMARK (SP);
4253 PUTBACK;
4254 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4255 }
4256
4257 --incede;
4258}
4259
4260
4261MODULE = Coro::State PACKAGE = Coro::AIO
4262
4263void
4264_register (char *target, char *proto, SV *req)
4265 CODE:
4266{
4267 SV *req_cv = s_get_cv_croak (req);
4268 /* newXSproto doesn't return the CV on 5.8 */
4269 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4270 sv_setpv ((SV *)slf_cv, proto);
4271 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4272}
4273
4274MODULE = Coro::State PACKAGE = Coro::Select
4275
4276void
4277patch_pp_sselect ()
4278 CODE:
4279 if (!coro_old_pp_sselect)
4280 {
4281 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4282 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4283 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4284 }
4285
4286void
4287unpatch_pp_sselect ()
4288 CODE:
4289 if (coro_old_pp_sselect)
4290 {
4291 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4292 coro_old_pp_sselect = 0;
4293 }
4294
4295MODULE = Coro::State PACKAGE = Coro::Util
4296
4297void
4298_exit (int code)
4299 CODE:
4300 _exit (code);
4301
4302NV
4303time ()
4304 CODE:
4305 RETVAL = nvtime (aTHX);
4306 OUTPUT:
4307 RETVAL
4308
4309NV
4310gettimeofday ()
4311 PPCODE:
4312{
4313 UV tv [2];
4314 u2time (aTHX_ tv);
4315 EXTEND (SP, 2);
4316 PUSHs (sv_2mortal (newSVuv (tv [0])));
4317 PUSHs (sv_2mortal (newSVuv (tv [1])));
4318}
4319

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines