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Comparing Coro/Coro/State.xs (file contents):
Revision 1.11 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.434 by root, Sat Nov 2 19:48:50 2013 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#if 1 16#include "schmorp.h"
6# define CHK(x) (void *)0 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
22#include <stdio.h>
23#include <errno.h>
24#include <assert.h>
25
26#ifndef SVs_PADSTALE
27# define SVs_PADSTALE 0
28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
7#else 33#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
9#endif 38# endif
39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
40# define PadlistMAX(pl) AvFILLp (pl)
41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
10 46
11#define MAY_FLUSH /* increases codesize */ 47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
53#else
54# include <inttypes.h> /* most portable stdint.h */
55#endif
12 56
13#define SUB_INIT "Coro::State::initialize" 57/* the maximum number of idle cctx that will be pooled */
58static int cctx_max_idle = 4;
14 59
15#define SAVE_DEFAV 0x00000001 60#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
16#define SAVE_DEFSV 0x00000002 61# define HAS_SCOPESTACK_NAME 1
17#define SAVE_ERRSV 0x00000004 62#endif
18 63
19#define SAVE_ALL -1 64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
20 68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
76# define STACKLEVEL ((void *)&stacklevel)
77#endif
78
79#define IN_DESTRUCT PL_dirty
80
81#include "CoroAPI.h"
82#define GCoroAPI (&coroapi) /* very sneaky */
83
84#ifdef USE_ITHREADS
85# if CORO_PTHREAD
86static void *coro_thx;
87# endif
88#endif
89
90#ifdef __linux
91# include <time.h> /* for timespec */
92# include <syscall.h> /* for SYS_* */
93# ifdef SYS_clock_gettime
94# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
95# define CORO_CLOCK_MONOTONIC 1
96# define CORO_CLOCK_THREAD_CPUTIME_ID 3
97# endif
98#endif
99
100static double (*nvtime)(); /* so why doesn't it take void? */
101static void (*u2time)(pTHX_ UV ret[2]);
102
103/* we hijack an hopefully unused CV flag for our purposes */
104#define CVf_SLF 0x4000
105static OP *pp_slf (pTHX);
106static void slf_destroy (pTHX_ struct coro *coro);
107
108static U32 cctx_gen;
109static size_t cctx_stacksize = CORO_STACKSIZE;
110static struct CoroAPI coroapi;
111static AV *main_mainstack; /* used to differentiate between $main and others */
112static JMPENV *main_top_env;
113static HV *coro_state_stash, *coro_stash;
114static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
115
116static AV *av_destroy; /* destruction queue */
117static SV *sv_manager; /* the manager coro */
118static SV *sv_idle; /* $Coro::idle */
119
120static GV *irsgv; /* $/ */
121static GV *stdoutgv; /* *STDOUT */
122static SV *rv_diehook;
123static SV *rv_warnhook;
124static HV *hv_sig; /* %SIG */
125
126/* async_pool helper stuff */
127static SV *sv_pool_rss;
128static SV *sv_pool_size;
129static SV *sv_async_pool_idle; /* description string */
130static AV *av_async_pool; /* idle pool */
131static SV *sv_Coro; /* class string */
132static CV *cv_pool_handler;
133
134/* Coro::AnyEvent */
135static SV *sv_activity;
136
137/* enable processtime/realtime profiling */
138static char enable_times;
139typedef U32 coro_ts[2];
140static coro_ts time_real, time_cpu;
141static char times_valid;
142
143static struct coro_cctx *cctx_first;
144static int cctx_count, cctx_idle;
145
146enum
147{
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx
158{
159 struct coro_cctx *next;
160
161 /* the stack */
162 struct coro_stack stack;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166#ifndef NDEBUG
167 JMPENV *idle_te; /* same as idle_sp, but for top_env */
168#endif
169 JMPENV *top_env;
170 coro_context cctx;
171
172 U32 gen;
173#if CORO_USE_VALGRIND
174 int valgrind_id;
175#endif
176 unsigned char flags;
177} coro_cctx;
178
179static coro_cctx *cctx_current; /* the currently running cctx */
180
181/*****************************************************************************/
182
183static MGVTBL coro_state_vtbl;
184
185enum
186{
187 CF_RUNNING = 0x0001, /* coroutine is running */
188 CF_READY = 0x0002, /* coroutine is ready */
189 CF_NEW = 0x0004, /* has never been switched to */
190 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
191 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
192 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
193};
194
195/* the structure where most of the perl state is stored, overlaid on the cxstack */
196typedef struct
197{
198 #define VARx(name,expr,type) type name;
199 #include "state.h"
200} perl_slots;
201
202/* how many context stack entries do we need for perl_slots */
203#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
204
205/* this is a structure representing a perl-level coroutine */
21struct coro { 206struct coro
22 /* optionally saved, might be zero */ 207{
23 AV *defav; 208 /* the C coroutine allocated to this perl coroutine, if any */
24 SV *defsv; 209 coro_cctx *cctx;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 210
30 /* the stacks and related info (callchain etc..) */ 211 /* ready queue */
31 PERL_SI *curstackinfo; 212 struct coro *next_ready;
32 AV *curstack; 213
214 /* state data */
215 struct CoroSLF slf_frame; /* saved slf frame */
33 AV *mainstack; 216 AV *mainstack;
34 SV **stack_sp; 217 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 218
219 CV *startcv; /* the CV to execute */
57 /* data associated with this coroutine (initial args) */ 220 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 221 int flags; /* CF_ flags */
222 HV *hv; /* the perl hash associated with this coro, if any */
223
224 /* statistics */
225 int usecount; /* number of transfers to this coro */
226
227 /* coro process data */
228 int prio;
229 SV *except; /* exception to be thrown */
230 SV *rouse_cb; /* last rouse callback */
231 AV *on_destroy; /* callbacks or coros to notify on destroy */
232 AV *status; /* the exit status list */
233
234 /* async_pool */
235 SV *saved_deffh;
236 SV *invoke_cb;
237 AV *invoke_av;
238
239 /* on_enter/on_leave */
240 AV *on_enter;
241 AV *on_leave;
242
243 /* swap_sv */
244 AV *swap_sv;
245
246 /* times */
247 coro_ts t_cpu, t_real;
248
249 /* linked list */
250 struct coro *next, *prev;
59}; 251};
60 252
61typedef struct coro *Coro__State; 253typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 254typedef struct coro *Coro__State_or_hashref;
63 255
64static HV *padlist_cache; 256/* the following variables are effectively part of the perl context */
257/* and get copied between struct coro and these variables */
258/* the main reason we don't support windows process emulation */
259static struct CoroSLF slf_frame; /* the current slf frame */
65 260
66/* mostly copied from op.c:cv_clone2 */ 261/** Coro ********************************************************************/
67STATIC AV * 262
68clone_padlist (AV *protopadlist) 263#define CORO_PRIO_MAX 3
264#define CORO_PRIO_HIGH 1
265#define CORO_PRIO_NORMAL 0
266#define CORO_PRIO_LOW -1
267#define CORO_PRIO_IDLE -3
268#define CORO_PRIO_MIN -4
269
270/* for Coro.pm */
271static SV *coro_current;
272static SV *coro_readyhook;
273static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
274static CV *cv_coro_run;
275static struct coro *coro_first;
276#define coro_nready coroapi.nready
277
278/** JIT *********************************************************************/
279
280#if CORO_JIT
281 /* APPLE doesn't have mmap though */
282 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
283 #ifndef CORO_JIT_TYPE
284 #if ECB_AMD64 && CORO_JIT_UNIXY
285 #define CORO_JIT_TYPE "amd64-unix"
286 #elif __i386 && CORO_JIT_UNIXY
287 #define CORO_JIT_TYPE "x86-unix"
288 #endif
289 #endif
290#endif
291
292#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
293 #undef CORO_JIT
294#endif
295
296#if CORO_JIT
297 typedef void (*load_save_perl_slots_type)(perl_slots *);
298 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
299#endif
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
304static SV *coro_select_select;
305
306/* horrible hack, but if it works... */
307static OP *
308coro_pp_sselect (pTHX)
69{ 309{
70 AV *av; 310 dSP;
71 I32 ix; 311 PUSHMARK (SP - 4); /* fake argument list */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 312 XPUSHs (coro_select_select);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 313 PUTBACK;
74 SV **pname = AvARRAY (protopad_name); 314
75 SV **ppad = AvARRAY (protopad); 315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
76 I32 fname = AvFILLp (protopad_name); 316 PL_op->op_flags |= OPf_STACKED;
77 I32 fpad = AvFILLp (protopad); 317 PL_op->op_private = 0;
78 AV *newpadlist, *newpad_name, *newpad; 318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325ecb_inline void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335ecb_inline double
336coro_nvtime (void)
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344ecb_inline void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353ecb_inline void
354time_init (pTHX)
355{
79 SV **npad; 356 SV **svp;
80 357
81 newpad_name = newAV (); 358 require_pv ("Time/HiRes.pm");
82 for (ix = fname; ix >= 0; ix--)
83 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
84 359
85 newpad = newAV (); 360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
86 av_fill (newpad, AvFILLp (protopad));
87 npad = AvARRAY (newpad);
88 361
89 newpadlist = newAV (); 362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV * ecb_noinline
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV * ecb_noinline
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV * ecb_noinline
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405ecb_inline void
406coro_times_update (void)
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428ecb_inline void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440ecb_inline void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (ecb_expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471ecb_inline MAGIC *
472SvSTATEhv_p (pTHX_ SV *coro)
473{
474 MAGIC *mg;
475
476 if (ecb_expect_true (
477 SvTYPE (coro) == SVt_PVHV
478 && (mg = CORO_MAGIC_state (coro))
479 && mg->mg_virtual == &coro_state_vtbl
480 ))
481 return mg;
482
483 return 0;
484}
485
486ecb_inline struct coro *
487SvSTATE_ (pTHX_ SV *coro)
488{
489 MAGIC *mg;
490
491 if (SvROK (coro))
492 coro = SvRV (coro);
493
494 mg = SvSTATEhv_p (aTHX_ coro);
495 if (!mg)
496 croak ("Coro::State object required");
497
498 return (struct coro *)mg->mg_ptr;
499}
500
501#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
502
503/* faster than SvSTATE, but expects a coroutine hv */
504#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
505#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
506
507/*****************************************************************************/
508/* padlist management and caching */
509
510ecb_inline PADLIST *
511coro_derive_padlist (pTHX_ CV *cv)
512{
513 PADLIST *padlist = CvPADLIST (cv);
514 PADLIST *newpadlist;
515 PAD *newpad;
516 PADOFFSET off = PadlistMAX (padlist) + 1;
517
518#if NEWPADAPI
519
520 while (!PadlistARRAY (padlist)[off - 1])
521 --off;
522
523 Perl_pad_push (aTHX_ padlist, off);
524 newpad = PadlistARRAY (padlist)[off];
525 PadlistARRAY (padlist)[off] = 0;
526
527#else
528
529#if PERL_VERSION_ATLEAST (5,10,0)
530 Perl_pad_push (aTHX_ padlist, off);
531#else
532 Perl_pad_push (aTHX_ padlist, off, 1);
533#endif
534
535 newpad = PadlistARRAY (padlist)[off];
536 PadlistMAX (padlist) = off - 1;
537
538#endif
539
540 newPADLIST (newpadlist);
541#if !PERL_VERSION_ATLEAST(5,15,3)
542 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
90 AvREAL_off (newpadlist); 543 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 544#endif
92 av_store (newpadlist, 1, (SV *) newpad);
93 545
94 av = newAV (); /* will be @_ */ 546 /* Already extended to 2 elements by newPADLIST. */
95 av_extend (av, 0); 547 PadlistMAX (newpadlist) = 1;
96 av_store (newpad, 0, (SV *) av); 548 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
97 AvFLAGS (av) = AVf_REIFY; 549 PadlistARRAY (newpadlist)[1] = newpad;
98 550
99 for (ix = fpad; ix > 0; ix--) 551 return newpadlist;
552}
553
554ecb_inline void
555free_padlist (pTHX_ PADLIST *padlist)
556{
557 /* may be during global destruction */
558 if (!IN_DESTRUCT)
100 { 559 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 560 I32 i = PadlistMAX (padlist);
102 if (namesv && namesv != &PL_sv_undef) 561
562 while (i > 0) /* special-case index 0 */
103 { 563 {
104 char *name = SvPVX (namesv); /* XXX */ 564 /* we try to be extra-careful here */
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 565 PAD *pad = PadlistARRAY (padlist)[i--];
106 { /* lexical from outside? */ 566 I32 j = PadMAX (pad);
107 npad[ix] = SvREFCNT_inc (ppad[ix]); 567
108 } 568 while (j >= 0)
109 else 569 SvREFCNT_dec (PadARRAY (pad)[j--]);
110 { /* our own lexical */ 570
111 SV *sv; 571 PadMAX (pad) = -1;
112 if (*name == '&') 572 SvREFCNT_dec (pad);
113 sv = SvREFCNT_inc (ppad[ix]);
114 else if (*name == '@')
115 sv = (SV *) newAV ();
116 else if (*name == '%')
117 sv = (SV *) newHV ();
118 else
119 sv = NEWSV (0, 0);
120 if (!SvPADBUSY (sv))
121 SvPADMY_on (sv);
122 npad[ix] = sv;
123 }
124 } 573 }
125 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
126 {
127 npad[ix] = SvREFCNT_inc (ppad[ix]);
128 }
129 else
130 {
131 SV *sv = NEWSV (0, 0);
132 SvPADTMP_on (sv);
133 npad[ix] = sv;
134 }
135 }
136 574
137#if 0 /* return -ENOTUNDERSTOOD */ 575 SvREFCNT_dec (PadlistNAMES (padlist));
138 /* Now that vars are all in place, clone nested closures. */
139 576
140 for (ix = fpad; ix > 0; ix--) { 577#if NEWPADAPI
141 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 578 Safefree (PadlistARRAY (padlist));
142 if (namesv 579 Safefree (padlist);
143 && namesv != &PL_sv_undef 580#else
144 && !(SvFLAGS(namesv) & SVf_FAKE)
145 && *SvPVX(namesv) == '&'
146 && CvCLONE(ppad[ix]))
147 {
148 CV *kid = cv_clone((CV*)ppad[ix]);
149 SvREFCNT_dec(ppad[ix]);
150 CvCLONE_on(kid);
151 SvPADMY_on(kid);
152 npad[ix] = (SV*)kid;
153 }
154 }
155#endif
156
157 return newpadlist;
158}
159
160#ifdef MAY_FLUSH
161STATIC AV *
162free_padlist (AV *padlist)
163{
164 /* may be during global destruction */
165 if (SvREFCNT(padlist))
166 {
167 I32 i = AvFILLp(padlist); 581 AvFILLp (padlist) = -1;
168 while (i >= 0) 582 AvREAL_off (padlist);
169 {
170 SV **svp = av_fetch(padlist, i--, FALSE);
171 SV *sv = svp ? *svp : Nullsv;
172 if (sv)
173 SvREFCNT_dec(sv);
174 }
175
176 SvREFCNT_dec((SV*)padlist); 583 SvREFCNT_dec ((SV*)padlist);
584#endif
585 }
586}
587
588static int
589coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
590{
591 PADLIST *padlist;
592 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
593 size_t len = *(size_t *)mg->mg_ptr;
594
595 /* perl manages to free our internal AV and _then_ call us */
596 if (IN_DESTRUCT)
597 return 0;
598
599 while (len--)
600 free_padlist (aTHX_ padlists[len]);
601
602 return 0;
603}
604
605static MGVTBL coro_cv_vtbl = {
606 0, 0, 0, 0,
607 coro_cv_free
608};
609
610/* the next two functions merely cache the padlists */
611ecb_inline void
612get_padlist (pTHX_ CV *cv)
613{
614 MAGIC *mg = CORO_MAGIC_cv (cv);
615 size_t *lenp;
616
617 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
618 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
619 else
620 {
621#if CORO_PREFER_PERL_FUNCTIONS
622 /* this is probably cleaner? but also slower! */
623 /* in practise, it seems to be less stable */
624 CV *cp = Perl_cv_clone (aTHX_ cv);
625 CvPADLIST (cv) = CvPADLIST (cp);
626 CvPADLIST (cp) = 0;
627 SvREFCNT_dec (cp);
628#else
629 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
630#endif
631 }
632}
633
634ecb_inline void
635put_padlist (pTHX_ CV *cv)
636{
637 MAGIC *mg = CORO_MAGIC_cv (cv);
638
639 if (ecb_expect_false (!mg))
640 {
641 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
642 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
643 mg->mg_len = 1; /* so mg_free frees mg_ptr */
644 }
645 else
646 Renew (mg->mg_ptr,
647 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
648 char);
649
650 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
651}
652
653/** load & save, init *******************************************************/
654
655ecb_inline void
656swap_sv (SV *a, SV *b)
657{
658 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
659 SV tmp;
660
661 /* swap sv_any */
662 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
663
664 /* swap sv_flags */
665 SvFLAGS (&tmp) = SvFLAGS (a);
666 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
667 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
668
669#if PERL_VERSION_ATLEAST (5,10,0)
670 /* perl 5.10 and later complicates this _quite_ a bit, but it also
671 * is much faster, so no quarrels here. alternatively, we could
672 * sv_upgrade to avoid this.
673 */
674 {
675 /* swap sv_u */
676 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
677
678 /* if SvANY points to the head, we need to adjust the pointers,
679 * as the pointer for a still points to b, and maybe vice versa.
680 */
681 #define svany_in_head(type) \
682 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
683
684 if (svany_in_head (SvTYPE (a)))
685 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
686
687 if (svany_in_head (SvTYPE (b)))
688 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
177 } 689 }
178}
179#endif 690#endif
180
181/* the next two functions merely cache the padlists */
182STATIC void
183get_padlist (CV *cv)
184{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
186
187 if (he && AvFILLp ((AV *)*he) >= 0)
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
189 else
190 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
191} 691}
192 692
193STATIC void 693/* swap sv heads, at least logically */
194put_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
197
198 if (SvTYPE (*he) != SVt_PVAV)
199 {
200 SvREFCNT_dec (*he);
201 *he = (SV *)newAV ();
202 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205}
206
207#ifdef MAY_FLUSH
208STATIC void
209flush_padlist_cache ()
210{
211 HV *hv = padlist_cache;
212 padlist_cache = newHV ();
213
214 if (hv_iterinit (hv))
215 {
216 HE *he;
217 AV *padlist;
218
219 while (!!(he = hv_iternext (hv)))
220 {
221 AV *av = (AV *)HeVAL(he);
222
223 /* casting is fun. */
224 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
225 free_padlist (padlist);
226 }
227 }
228
229 SvREFCNT_dec (hv);
230}
231#endif
232
233#define SB do {
234#define SE } while (0)
235
236#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
237#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
238
239#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240
241static void 694static void
695swap_svs (pTHX_ Coro__State c)
696{
697 int i;
698
699 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
700 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
701}
702
703#define SWAP_SVS(coro) \
704 if (ecb_expect_false ((coro)->swap_sv)) \
705 swap_svs (aTHX_ (coro))
706
707static void
708on_enterleave_call (pTHX_ SV *cb);
709
710static void
242load_state(pTHX_ Coro__State c) 711load_perl (pTHX_ Coro__State c)
243{ 712{
244 PL_dowarn = c->dowarn; 713 perl_slots *slot = c->slot;
714 c->slot = 0;
245 715
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 716 PL_mainstack = c->mainstack;
249 PL_stack_sp = c->stack_sp;
250 PL_op = c->op;
251 PL_curpad = c->curpad;
252 PL_stack_base = c->stack_base;
253 PL_stack_max = c->stack_max;
254 PL_tmps_stack = c->tmps_stack;
255 PL_tmps_floor = c->tmps_floor;
256 PL_tmps_ix = c->tmps_ix;
257 PL_tmps_max = c->tmps_max;
258 PL_markstack = c->markstack;
259 PL_markstack_ptr = c->markstack_ptr;
260 PL_markstack_max = c->markstack_max;
261 PL_scopestack = c->scopestack;
262 PL_scopestack_ix = c->scopestack_ix;
263 PL_scopestack_max = c->scopestack_max;
264 PL_savestack = c->savestack;
265 PL_savestack_ix = c->savestack_ix;
266 PL_savestack_max = c->savestack_max;
267 PL_retstack = c->retstack;
268 PL_retstack_ix = c->retstack_ix;
269 PL_retstack_max = c->retstack_max;
270 PL_curcop = c->curcop;
271 717
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 718#if CORO_JIT
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 719 load_perl_slots (slot);
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 720#else
721 #define VARx(name,expr,type) expr = slot->name;
722 #include "state.h"
723#endif
275 724
276 { 725 {
277 dSP; 726 dSP;
727
278 CV *cv; 728 CV *cv;
279 729
280 /* now do the ugly restore mess */ 730 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 731 while (ecb_expect_true (cv = (CV *)POPs))
282 { 732 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 733 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 734 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 735 CvPADLIST (cv) = (PADLIST *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 736 }
296 737
297 PUTBACK; 738 PUTBACK;
298 } 739 }
299}
300 740
741 slf_frame = c->slf_frame;
742 CORO_THROW = c->except;
743
744 if (ecb_expect_false (enable_times))
745 {
746 if (ecb_expect_false (!times_valid))
747 coro_times_update ();
748
749 coro_times_sub (c);
750 }
751
752 if (ecb_expect_false (c->on_enter))
753 {
754 int i;
755
756 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
757 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
758 }
759
760 SWAP_SVS (c);
761}
762
301static void 763static void
302save_state(pTHX_ Coro__State c, int flags) 764save_perl (pTHX_ Coro__State c)
303{ 765{
766 SWAP_SVS (c);
767
768 if (ecb_expect_false (c->on_leave))
769 {
770 int i;
771
772 for (i = AvFILLp (c->on_leave); i >= 0; --i)
773 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
774 }
775
776 times_valid = 0;
777
778 if (ecb_expect_false (enable_times))
779 {
780 coro_times_update (); times_valid = 1;
781 coro_times_add (c);
782 }
783
784 c->except = CORO_THROW;
785 c->slf_frame = slf_frame;
786
304 { 787 {
305 dSP; 788 dSP;
306 I32 cxix = cxstack_ix; 789 I32 cxix = cxstack_ix;
307 PERL_CONTEXT *ccstk = cxstack; 790 PERL_CONTEXT *ccstk = cxstack;
308 PERL_SI *top_si = PL_curstackinfo; 791 PERL_SI *top_si = PL_curstackinfo;
… …
310 /* 793 /*
311 * the worst thing you can imagine happens first - we have to save 794 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 795 * (and reinitialize) all cv's in the whole callchain :(
313 */ 796 */
314 797
315 PUSHs (Nullsv); 798 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 799 /* this loop was inspired by pp_caller */
317 for (;;) 800 for (;;)
318 { 801 {
319 do 802 while (ecb_expect_true (cxix >= 0))
320 { 803 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 804 PERL_CONTEXT *cx = &ccstk[cxix--];
322 805
323 if (CxTYPE(cx) == CXt_SUB) 806 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
324 { 807 {
325 CV *cv = cx->blk_sub.cv; 808 CV *cv = cx->blk_sub.cv;
809
326 if (CvDEPTH(cv)) 810 if (ecb_expect_true (CvDEPTH (cv)))
327 { 811 {
328#ifdef USE_THREADS
329 /*XPUSHs ((SV *)CvOWNER(cv));*/
330 /*CvOWNER(cv) = 0;*/
331 /*error must unlock this cv etc.. etc...*/
332#endif
333 EXTEND (SP, CvDEPTH(cv)*2); 812 EXTEND (SP, 3);
334
335 while (--CvDEPTH(cv))
336 {
337 /* this tells the restore code to increment CvDEPTH */
338 PUSHs (Nullsv);
339 PUSHs ((SV *)cv);
340 }
341
342 PUSHs ((SV *)CvPADLIST(cv)); 813 PUSHs ((SV *)CvPADLIST (cv));
814 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 815 PUSHs ((SV *)cv);
344 816
345 get_padlist (cv); /* this is a monster */ 817 CvDEPTH (cv) = 0;
818 get_padlist (aTHX_ cv);
346 } 819 }
347 } 820 }
348 else if (CxTYPE(cx) == CXt_FORMAT)
349 {
350 /* I never used formats, so how should I know how these are implemented? */
351 /* my bold guess is as a simple, plain sub... */
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353 }
354 } 821 }
355 while (cxix >= 0);
356 822
357 if (top_si->si_type == PERLSI_MAIN) 823 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
358 break; 824 break;
359 825
360 top_si = top_si->si_prev; 826 top_si = top_si->si_prev;
361 ccstk = top_si->si_cxstack; 827 ccstk = top_si->si_cxstack;
362 cxix = top_si->si_cxix; 828 cxix = top_si->si_cxix;
363 } 829 }
364 830
365 PUTBACK; 831 PUTBACK;
366 } 832 }
367 833
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 834 /* allocate some space on the context stack for our purposes */
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 835 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 836 {
837 unsigned int i;
371 838
372 /* I have not the slightest idea of why av_reify is necessary */ 839 for (i = 0; i < SLOT_COUNT; ++i)
373 /* but if it's missing the defav contents magically get replaced sometimes */ 840 CXINC;
374 if (c->defav)
375 av_reify (c->defav);
376 841
377 c->dowarn = PL_dowarn; 842 cxstack_ix -= SLOT_COUNT; /* undo allocation */
843 }
378 844
379 c->curstackinfo = PL_curstackinfo;
380 c->curstack = PL_curstack;
381 c->mainstack = PL_mainstack; 845 c->mainstack = PL_mainstack;
382 c->stack_sp = PL_stack_sp; 846
383 c->op = PL_op; 847 {
384 c->curpad = PL_curpad; 848 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
849
850#if CORO_JIT
851 save_perl_slots (slot);
852#else
853 #define VARx(name,expr,type) slot->name = expr;
854 #include "state.h"
855#endif
856 }
857}
858
859/*
860 * allocate various perl stacks. This is almost an exact copy
861 * of perl.c:init_stacks, except that it uses less memory
862 * on the (sometimes correct) assumption that coroutines do
863 * not usually need a lot of stackspace.
864 */
865#if CORO_PREFER_PERL_FUNCTIONS
866# define coro_init_stacks(thx) init_stacks ()
867#else
868static void
869coro_init_stacks (pTHX)
870{
871 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
872 PL_curstackinfo->si_type = PERLSI_MAIN;
873 PL_curstack = PL_curstackinfo->si_stack;
874 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
875
876 PL_stack_base = AvARRAY(PL_curstack);
385 c->stack_base = PL_stack_base; 877 PL_stack_sp = PL_stack_base;
386 c->stack_max = PL_stack_max; 878 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387 c->tmps_stack = PL_tmps_stack; 879
388 c->tmps_floor = PL_tmps_floor; 880 New(50,PL_tmps_stack,32,SV*);
389 c->tmps_ix = PL_tmps_ix; 881 PL_tmps_floor = -1;
390 c->tmps_max = PL_tmps_max; 882 PL_tmps_ix = -1;
883 PL_tmps_max = 32;
884
885 New(54,PL_markstack,16,I32);
391 c->markstack = PL_markstack; 886 PL_markstack_ptr = PL_markstack;
392 c->markstack_ptr = PL_markstack_ptr; 887 PL_markstack_max = PL_markstack + 16;
393 c->markstack_max = PL_markstack_max; 888
394 c->scopestack = PL_scopestack; 889#ifdef SET_MARK_OFFSET
395 c->scopestack_ix = PL_scopestack_ix; 890 SET_MARK_OFFSET;
396 c->scopestack_max = PL_scopestack_max; 891#endif
397 c->savestack = PL_savestack; 892
398 c->savestack_ix = PL_savestack_ix; 893 New(54,PL_scopestack,8,I32);
399 c->savestack_max = PL_savestack_max; 894 PL_scopestack_ix = 0;
400 c->retstack = PL_retstack; 895 PL_scopestack_max = 8;
401 c->retstack_ix = PL_retstack_ix; 896#if HAS_SCOPESTACK_NAME
402 c->retstack_max = PL_retstack_max; 897 New(54,PL_scopestack_name,8,const char*);
403 c->curcop = PL_curcop; 898#endif
899
900 New(54,PL_savestack,24,ANY);
901 PL_savestack_ix = 0;
902 PL_savestack_max = 24;
903
904#if !PERL_VERSION_ATLEAST (5,10,0)
905 New(54,PL_retstack,4,OP*);
906 PL_retstack_ix = 0;
907 PL_retstack_max = 4;
908#endif
404} 909}
910#endif
405 911
406/* 912/*
407 * destroy the stacks, the callchain etc... 913 * destroy the stacks, the callchain etc...
408 * still there is a memleak of 128 bytes...
409 */ 914 */
410STATIC void 915static void
411destroy_stacks(pTHX) 916coro_destruct_stacks (pTHX)
412{ 917{
413 /* is this ugly, I ask? */
414 while (PL_scopestack_ix)
415 LEAVE;
416
417 /* sure it is, but more important: is it correct?? :/ */
418 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
419 FREETMPS;
420
421 while (PL_curstackinfo->si_next) 918 while (PL_curstackinfo->si_next)
422 PL_curstackinfo = PL_curstackinfo->si_next; 919 PL_curstackinfo = PL_curstackinfo->si_next;
423 920
424 while (PL_curstackinfo) 921 while (PL_curstackinfo)
425 { 922 {
426 PERL_SI *p = PL_curstackinfo->si_prev; 923 PERL_SI *p = PL_curstackinfo->si_prev;
427 924
428 { 925 if (!IN_DESTRUCT)
429 dSP;
430 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
431 PUTBACK; /* possibly superfluous */
432 }
433
434 dounwind(-1);
435
436 SvREFCNT_dec(PL_curstackinfo->si_stack); 926 SvREFCNT_dec (PL_curstackinfo->si_stack);
927
437 Safefree(PL_curstackinfo->si_cxstack); 928 Safefree (PL_curstackinfo->si_cxstack);
438 Safefree(PL_curstackinfo); 929 Safefree (PL_curstackinfo);
439 PL_curstackinfo = p; 930 PL_curstackinfo = p;
440 } 931 }
441 932
442 Safefree(PL_tmps_stack); 933 Safefree (PL_tmps_stack);
443 Safefree(PL_markstack); 934 Safefree (PL_markstack);
444 Safefree(PL_scopestack); 935 Safefree (PL_scopestack);
936#if HAS_SCOPESTACK_NAME
937 Safefree (PL_scopestack_name);
938#endif
445 Safefree(PL_savestack); 939 Safefree (PL_savestack);
940#if !PERL_VERSION_ATLEAST (5,10,0)
446 Safefree(PL_retstack); 941 Safefree (PL_retstack);
942#endif
447} 943}
448 944
449STATIC void 945#define CORO_RSS \
450transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 946 rss += sizeof (SYM (curstackinfo)); \
451{ 947 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
452 dSP; 948 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
949 rss += SYM (tmps_max) * sizeof (SV *); \
950 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
951 rss += SYM (scopestack_max) * sizeof (I32); \
952 rss += SYM (savestack_max) * sizeof (ANY);
453 953
454 if (prev != next) 954static size_t
455 { 955coro_rss (pTHX_ struct coro *coro)
456 /* 956{
457 * this could be done in newprocess which would lead to 957 size_t rss = sizeof (*coro);
458 * extremely elegant and fast (just SAVE/LOAD) 958
459 * code here, but lazy allocation of stacks has also
460 * some virtues and the overhead of the if() is nil.
461 */
462 if (next->mainstack) 959 if (coro->mainstack)
960 {
961 if (coro->flags & CF_RUNNING)
463 { 962 {
464 SAVE (prev, flags); 963 #define SYM(sym) PL_ ## sym
465 LOAD (next); 964 CORO_RSS;
466 /* mark this state as in-use */ 965 #undef SYM
467 next->mainstack = 0;
468 next->tmps_ix = -2;
469 }
470 else if (next->tmps_ix == -2)
471 {
472 croak ("tried to transfer to running coroutine");
473 } 966 }
474 else 967 else
475 { 968 {
969 #define SYM(sym) coro->slot->sym
970 CORO_RSS;
971 #undef SYM
972 }
973 }
974
975 return rss;
976}
977
978/** coroutine stack handling ************************************************/
979
980static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
981static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
982static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
983
984/* apparently < 5.8.8 */
985#ifndef MgPV_nolen_const
986#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
987 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
988 (const char*)(mg)->mg_ptr)
989#endif
990
991/*
992 * This overrides the default magic get method of %SIG elements.
993 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
994 * and instead of trying to save and restore the hash elements (extremely slow),
995 * we just provide our own readback here.
996 */
997static int ecb_cold
998coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
999{
1000 const char *s = MgPV_nolen_const (mg);
1001
1002 if (*s == '_')
1003 {
1004 SV **svp = 0;
1005
1006 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1007 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1008
1009 if (svp)
1010 {
1011 SV *ssv;
1012
1013 if (!*svp)
1014 ssv = &PL_sv_undef;
1015 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1016 ssv = sv_2mortal (newRV_inc (*svp));
476 /* 1017 else
1018 ssv = *svp;
1019
1020 sv_setsv (sv, ssv);
1021 return 0;
1022 }
1023 }
1024
1025 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1026}
1027
1028static int ecb_cold
1029coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1030{
1031 const char *s = MgPV_nolen_const (mg);
1032
1033 if (*s == '_')
1034 {
1035 SV **svp = 0;
1036
1037 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1038 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1039
1040 if (svp)
1041 {
1042 SV *old = *svp;
1043 *svp = 0;
1044 SvREFCNT_dec (old);
1045 return 0;
1046 }
1047 }
1048
1049 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1050}
1051
1052static int ecb_cold
1053coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1054{
1055 const char *s = MgPV_nolen_const (mg);
1056
1057 if (*s == '_')
1058 {
1059 SV **svp = 0;
1060
1061 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1062 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1063
1064 if (svp)
1065 {
1066 SV *old = *svp;
1067 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1068 SvREFCNT_dec (old);
1069 return 0;
1070 }
1071 }
1072
1073 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1074}
1075
1076static void
1077prepare_nop (pTHX_ struct coro_transfer_args *ta)
1078{
1079 /* kind of mega-hacky, but works */
1080 ta->next = ta->prev = (struct coro *)ta;
1081}
1082
1083static int
1084slf_check_nop (pTHX_ struct CoroSLF *frame)
1085{
1086 return 0;
1087}
1088
1089static int
1090slf_check_repeat (pTHX_ struct CoroSLF *frame)
1091{
1092 return 1;
1093}
1094
1095static UNOP init_perl_op;
1096
1097ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1098init_perl (pTHX_ struct coro *coro)
1099{
1100 /*
477 * emulate part of the perl startup here. 1101 * emulate part of the perl startup here.
478 */ 1102 */
1103 coro_init_stacks (aTHX);
1104
1105 PL_runops = RUNOPS_DEFAULT;
1106 PL_curcop = &PL_compiling;
1107 PL_in_eval = EVAL_NULL;
1108 PL_comppad = 0;
1109 PL_comppad_name = 0;
1110 PL_comppad_name_fill = 0;
1111 PL_comppad_name_floor = 0;
1112 PL_curpm = 0;
1113 PL_curpad = 0;
1114 PL_localizing = 0;
1115 PL_restartop = 0;
1116#if PERL_VERSION_ATLEAST (5,10,0)
1117 PL_parser = 0;
1118#endif
1119 PL_hints = 0;
1120
1121 /* recreate the die/warn hooks */
1122 PL_diehook = SvREFCNT_inc (rv_diehook);
1123 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1124
1125 GvSV (PL_defgv) = newSV (0);
1126 GvAV (PL_defgv) = coro->args; coro->args = 0;
1127 GvSV (PL_errgv) = newSV (0);
1128 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1129 GvHV (PL_hintgv) = 0;
1130 PL_rs = newSVsv (GvSV (irsgv));
1131 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1132
1133 {
1134 dSP;
479 UNOP myop; 1135 UNOP myop;
480 1136
481 SAVE (prev, -1); /* first get rid of the old state */
482
483 init_stacks (); /* from perl.c */
484 SPAGAIN;
485
486 PL_op = (OP *)&myop;
487 /*PL_curcop = 0;*/
488 SvREFCNT_dec (GvAV (PL_defgv));
489 GvAV (PL_defgv) = next->args;
490
491 Zero(&myop, 1, UNOP); 1137 Zero (&myop, 1, UNOP);
492 myop.op_next = Nullop; 1138 myop.op_next = Nullop;
1139 myop.op_type = OP_ENTERSUB;
493 myop.op_flags = OPf_WANT_VOID; 1140 myop.op_flags = OPf_WANT_VOID;
494 1141
1142 PUSHMARK (SP);
1143 PUSHs ((SV *)coro->startcv);
1144 PUTBACK;
1145 PL_op = (OP *)&myop;
1146 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1147 }
1148
1149 /* this newly created coroutine might be run on an existing cctx which most
1150 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1151 */
1152 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1153 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1154 slf_frame.destroy = 0;
1155
1156 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1157 init_perl_op.op_next = PL_op;
1158 init_perl_op.op_type = OP_ENTERSUB;
1159 init_perl_op.op_ppaddr = pp_slf;
1160 /* no flags etc. required, as an init function won't be called */
1161
1162 PL_op = (OP *)&init_perl_op;
1163
1164 /* copy throw, in case it was set before init_perl */
1165 CORO_THROW = coro->except;
1166
1167 SWAP_SVS (coro);
1168
1169 if (ecb_expect_false (enable_times))
1170 {
1171 coro_times_update ();
1172 coro_times_sub (coro);
1173 }
1174}
1175
1176static void
1177coro_unwind_stacks (pTHX)
1178{
1179 if (!IN_DESTRUCT)
1180 {
1181 /* restore all saved variables and stuff */
1182 LEAVE_SCOPE (0);
1183 assert (PL_tmps_floor == -1);
1184
1185 /* free all temporaries */
1186 FREETMPS;
1187 assert (PL_tmps_ix == -1);
1188
1189 /* unwind all extra stacks */
1190 POPSTACK_TO (PL_mainstack);
1191
1192 /* unwind main stack */
1193 dounwind (-1);
1194 }
1195}
1196
1197static void
1198destroy_perl (pTHX_ struct coro *coro)
1199{
1200 SV *svf [9];
1201
1202 {
1203 SV *old_current = SvRV (coro_current);
1204 struct coro *current = SvSTATE (old_current);
1205
1206 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1207
1208 save_perl (aTHX_ current);
1209
1210 /* this will cause transfer_check to croak on block*/
1211 SvRV_set (coro_current, (SV *)coro->hv);
1212
1213 load_perl (aTHX_ coro);
1214
1215 coro_unwind_stacks (aTHX);
1216
1217 /* restore swapped sv's */
1218 SWAP_SVS (coro);
1219
1220 coro_destruct_stacks (aTHX);
1221
1222 /* now save some sv's to be free'd later */
1223 svf [0] = GvSV (PL_defgv);
1224 svf [1] = (SV *)GvAV (PL_defgv);
1225 svf [2] = GvSV (PL_errgv);
1226 svf [3] = (SV *)PL_defoutgv;
1227 svf [4] = PL_rs;
1228 svf [5] = GvSV (irsgv);
1229 svf [6] = (SV *)GvHV (PL_hintgv);
1230 svf [7] = PL_diehook;
1231 svf [8] = PL_warnhook;
1232 assert (9 == sizeof (svf) / sizeof (*svf));
1233
1234 SvRV_set (coro_current, old_current);
1235
1236 load_perl (aTHX_ current);
1237 }
1238
1239 {
1240 unsigned int i;
1241
1242 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1243 SvREFCNT_dec (svf [i]);
1244
1245 SvREFCNT_dec (coro->saved_deffh);
1246 SvREFCNT_dec (coro->rouse_cb);
1247 SvREFCNT_dec (coro->invoke_cb);
1248 SvREFCNT_dec (coro->invoke_av);
1249 }
1250}
1251
1252ecb_inline void
1253free_coro_mortal (pTHX)
1254{
1255 if (ecb_expect_true (coro_mortal))
1256 {
1257 SvREFCNT_dec ((SV *)coro_mortal);
1258 coro_mortal = 0;
1259 }
1260}
1261
1262static int
1263runops_trace (pTHX)
1264{
1265 COP *oldcop = 0;
1266 int oldcxix = -2;
1267
1268 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1269 {
1270 PERL_ASYNC_CHECK ();
1271
1272 if (cctx_current->flags & CC_TRACE_ALL)
1273 {
1274 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1275 {
1276 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1277 SV **bot, **top;
1278 AV *av = newAV (); /* return values */
1279 SV **cb;
1280 dSP;
1281
1282 GV *gv = CvGV (cx->blk_sub.cv);
1283 SV *fullname = sv_2mortal (newSV (0));
1284 if (isGV (gv))
1285 gv_efullname3 (fullname, gv, 0);
1286
1287 bot = PL_stack_base + cx->blk_oldsp + 1;
1288 top = cx->blk_gimme == G_ARRAY ? SP + 1
1289 : cx->blk_gimme == G_SCALAR ? bot + 1
1290 : bot;
1291
1292 av_extend (av, top - bot);
1293 while (bot < top)
1294 av_push (av, SvREFCNT_inc_NN (*bot++));
1295
1296 PL_runops = RUNOPS_DEFAULT;
1297 ENTER;
1298 SAVETMPS;
1299 EXTEND (SP, 3);
1300 PUSHMARK (SP);
1301 PUSHs (&PL_sv_no);
1302 PUSHs (fullname);
1303 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1304 PUTBACK;
1305 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1306 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1307 SPAGAIN;
1308 FREETMPS;
1309 LEAVE;
1310 PL_runops = runops_trace;
1311 }
1312
1313 if (oldcop != PL_curcop)
1314 {
1315 oldcop = PL_curcop;
1316
1317 if (PL_curcop != &PL_compiling)
1318 {
1319 SV **cb;
1320
1321 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1322 {
1323 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1324
1325 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1326 {
1327 dSP;
1328 GV *gv = CvGV (cx->blk_sub.cv);
1329 SV *fullname = sv_2mortal (newSV (0));
1330
1331 if (isGV (gv))
1332 gv_efullname3 (fullname, gv, 0);
1333
1334 PL_runops = RUNOPS_DEFAULT;
1335 ENTER;
1336 SAVETMPS;
1337 EXTEND (SP, 3);
1338 PUSHMARK (SP);
1339 PUSHs (&PL_sv_yes);
1340 PUSHs (fullname);
1341 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1342 PUTBACK;
1343 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1344 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1345 SPAGAIN;
1346 FREETMPS;
1347 LEAVE;
1348 PL_runops = runops_trace;
1349 }
1350
1351 oldcxix = cxstack_ix;
1352 }
1353
1354 if (cctx_current->flags & CC_TRACE_LINE)
1355 {
1356 dSP;
1357
1358 PL_runops = RUNOPS_DEFAULT;
1359 ENTER;
1360 SAVETMPS;
1361 EXTEND (SP, 3);
1362 PL_runops = RUNOPS_DEFAULT;
1363 PUSHMARK (SP);
1364 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1365 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1366 PUTBACK;
1367 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1368 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1369 SPAGAIN;
1370 FREETMPS;
1371 LEAVE;
1372 PL_runops = runops_trace;
1373 }
1374 }
1375 }
1376 }
1377 }
1378
1379 TAINT_NOT;
1380 return 0;
1381}
1382
1383static struct CoroSLF cctx_ssl_frame;
1384
1385static void
1386slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1387{
1388 ta->prev = 0;
1389}
1390
1391static int
1392slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1393{
1394 *frame = cctx_ssl_frame;
1395
1396 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1397}
1398
1399/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1400static void ecb_noinline
1401cctx_prepare (pTHX)
1402{
1403 PL_top_env = &PL_start_env;
1404
1405 if (cctx_current->flags & CC_TRACE)
1406 PL_runops = runops_trace;
1407
1408 /* we already must be executing an SLF op, there is no other valid way
1409 * that can lead to creation of a new cctx */
1410 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1411 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1412
1413 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1414 cctx_ssl_frame = slf_frame;
1415
1416 slf_frame.prepare = slf_prepare_set_stacklevel;
1417 slf_frame.check = slf_check_set_stacklevel;
1418}
1419
1420/* the tail of transfer: execute stuff we can only do after a transfer */
1421ecb_inline void
1422transfer_tail (pTHX)
1423{
1424 free_coro_mortal (aTHX);
1425}
1426
1427/* try to exit the same way perl's main function would do */
1428/* we do not bother resetting the environment or other things *7
1429/* that are not, uhm, essential */
1430/* this obviously also doesn't work when perl is embedded */
1431static void ecb_noinline ecb_cold
1432perlish_exit (pTHX)
1433{
1434 int exitstatus = perl_destruct (PL_curinterp);
1435 perl_free (PL_curinterp);
1436 exit (exitstatus);
1437}
1438
1439/*
1440 * this is a _very_ stripped down perl interpreter ;)
1441 */
1442static void
1443cctx_run (void *arg)
1444{
1445#ifdef USE_ITHREADS
1446# if CORO_PTHREAD
1447 PERL_SET_CONTEXT (coro_thx);
1448# endif
1449#endif
1450 {
1451 dTHX;
1452
1453 /* normally we would need to skip the entersub here */
1454 /* not doing so will re-execute it, which is exactly what we want */
1455 /* PL_nop = PL_nop->op_next */
1456
1457 /* inject a fake subroutine call to cctx_init */
1458 cctx_prepare (aTHX);
1459
1460 /* cctx_run is the alternative tail of transfer() */
1461 transfer_tail (aTHX);
1462
1463 /* somebody or something will hit me for both perl_run and PL_restartop */
1464 PL_restartop = PL_op;
1465 perl_run (PL_curinterp);
1466 /*
1467 * Unfortunately, there is no way to get at the return values of the
1468 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1469 * runtime errors here, as this is just a random interpreter, not a thread.
1470 */
1471
1472 /*
1473 * If perl-run returns we assume exit() was being called or the coro
1474 * fell off the end, which seems to be the only valid (non-bug)
1475 * reason for perl_run to return. We try to mimic whatever perl is normally
1476 * doing in that case. YMMV.
1477 */
1478 perlish_exit (aTHX);
1479 }
1480}
1481
1482static coro_cctx *
1483cctx_new (void)
1484{
1485 coro_cctx *cctx;
1486
1487 ++cctx_count;
1488 New (0, cctx, 1, coro_cctx);
1489
1490 cctx->gen = cctx_gen;
1491 cctx->flags = 0;
1492 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1493
1494 return cctx;
1495}
1496
1497/* create a new cctx only suitable as source */
1498static coro_cctx *
1499cctx_new_empty (void)
1500{
1501 coro_cctx *cctx = cctx_new ();
1502
1503 cctx->stack.sptr = 0;
1504 coro_create (&cctx->cctx, 0, 0, 0, 0);
1505
1506 return cctx;
1507}
1508
1509/* create a new cctx suitable as destination/running a perl interpreter */
1510static coro_cctx *
1511cctx_new_run (void)
1512{
1513 coro_cctx *cctx = cctx_new ();
1514
1515 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1516 {
1517 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1518 _exit (EXIT_FAILURE);
1519 }
1520
1521 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1522
1523 return cctx;
1524}
1525
1526static void
1527cctx_destroy (coro_cctx *cctx)
1528{
1529 if (!cctx)
1530 return;
1531
1532 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1533
1534 --cctx_count;
1535 coro_destroy (&cctx->cctx);
1536
1537 coro_stack_free (&cctx->stack);
1538
1539 Safefree (cctx);
1540}
1541
1542/* wether this cctx should be destructed */
1543#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1544
1545static coro_cctx *
1546cctx_get (pTHX)
1547{
1548 while (ecb_expect_true (cctx_first))
1549 {
1550 coro_cctx *cctx = cctx_first;
1551 cctx_first = cctx->next;
1552 --cctx_idle;
1553
1554 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1555 return cctx;
1556
1557 cctx_destroy (cctx);
1558 }
1559
1560 return cctx_new_run ();
1561}
1562
1563static void
1564cctx_put (coro_cctx *cctx)
1565{
1566 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1567
1568 /* free another cctx if overlimit */
1569 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1570 {
1571 coro_cctx *first = cctx_first;
1572 cctx_first = first->next;
1573 --cctx_idle;
1574
1575 cctx_destroy (first);
1576 }
1577
1578 ++cctx_idle;
1579 cctx->next = cctx_first;
1580 cctx_first = cctx;
1581}
1582
1583/** coroutine switching *****************************************************/
1584
1585static void
1586transfer_check (pTHX_ struct coro *prev, struct coro *next)
1587{
1588 /* TODO: throwing up here is considered harmful */
1589
1590 if (ecb_expect_true (prev != next))
1591 {
1592 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1593 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1594
1595 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1596 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1597
1598#if !PERL_VERSION_ATLEAST (5,10,0)
1599 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1600 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1601#endif
1602 }
1603}
1604
1605/* always use the TRANSFER macro */
1606static void ecb_noinline /* noinline so we have a fixed stackframe */
1607transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1608{
1609 dSTACKLEVEL;
1610
1611 /* sometimes transfer is only called to set idle_sp */
1612 if (ecb_expect_false (!prev))
1613 {
1614 cctx_current->idle_sp = STACKLEVEL;
1615 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1616 }
1617 else if (ecb_expect_true (prev != next))
1618 {
1619 coro_cctx *cctx_prev;
1620
1621 if (ecb_expect_false (prev->flags & CF_NEW))
1622 {
1623 /* create a new empty/source context */
1624 prev->flags &= ~CF_NEW;
1625 prev->flags |= CF_RUNNING;
1626 }
1627
1628 prev->flags &= ~CF_RUNNING;
1629 next->flags |= CF_RUNNING;
1630
1631 /* first get rid of the old state */
1632 save_perl (aTHX_ prev);
1633
1634 if (ecb_expect_false (next->flags & CF_NEW))
1635 {
1636 /* need to start coroutine */
1637 next->flags &= ~CF_NEW;
1638 /* setup coroutine call */
1639 init_perl (aTHX_ next);
1640 }
1641 else
1642 load_perl (aTHX_ next);
1643
1644 /* possibly untie and reuse the cctx */
1645 if (ecb_expect_true (
1646 cctx_current->idle_sp == STACKLEVEL
1647 && !(cctx_current->flags & CC_TRACE)
1648 && !force_cctx
1649 ))
1650 {
1651 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1652 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1653
1654 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1655 /* without this the next cctx_get might destroy the running cctx while still in use */
1656 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1657 if (ecb_expect_true (!next->cctx))
1658 next->cctx = cctx_get (aTHX);
1659
1660 cctx_put (cctx_current);
1661 }
1662 else
1663 prev->cctx = cctx_current;
1664
1665 ++next->usecount;
1666
1667 cctx_prev = cctx_current;
1668 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1669
1670 next->cctx = 0;
1671
1672 if (ecb_expect_false (cctx_prev != cctx_current))
1673 {
1674 cctx_prev->top_env = PL_top_env;
1675 PL_top_env = cctx_current->top_env;
1676 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1677 }
1678
1679 transfer_tail (aTHX);
1680 }
1681}
1682
1683#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1684#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1685
1686/** high level stuff ********************************************************/
1687
1688/* this function is actually Coro, not Coro::State, but we call it from here */
1689/* because it is convenient - but it hasn't been declared yet for that reason */
1690static void
1691coro_call_on_destroy (pTHX_ struct coro *coro);
1692
1693static void
1694coro_state_destroy (pTHX_ struct coro *coro)
1695{
1696 if (coro->flags & CF_ZOMBIE)
1697 return;
1698
1699 slf_destroy (aTHX_ coro);
1700
1701 coro->flags |= CF_ZOMBIE;
1702
1703 if (coro->flags & CF_READY)
1704 {
1705 /* reduce nready, as destroying a ready coro effectively unreadies it */
1706 /* alternative: look through all ready queues and remove the coro */
1707 --coro_nready;
1708 }
1709 else
1710 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1711
1712 if (coro->next) coro->next->prev = coro->prev;
1713 if (coro->prev) coro->prev->next = coro->next;
1714 if (coro == coro_first) coro_first = coro->next;
1715
1716 if (coro->mainstack
1717 && coro->mainstack != main_mainstack
1718 && coro->slot
1719 && !PL_dirty)
1720 destroy_perl (aTHX_ coro);
1721
1722 cctx_destroy (coro->cctx);
1723 SvREFCNT_dec (coro->startcv);
1724 SvREFCNT_dec (coro->args);
1725 SvREFCNT_dec (coro->swap_sv);
1726 SvREFCNT_dec (CORO_THROW);
1727
1728 coro_call_on_destroy (aTHX_ coro);
1729
1730 /* more destruction mayhem in coro_state_free */
1731}
1732
1733static int
1734coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1735{
1736 struct coro *coro = (struct coro *)mg->mg_ptr;
1737 mg->mg_ptr = 0;
1738
1739 coro_state_destroy (aTHX_ coro);
1740 SvREFCNT_dec (coro->on_destroy);
1741 SvREFCNT_dec (coro->status);
1742
1743 Safefree (coro);
1744
1745 return 0;
1746}
1747
1748static int ecb_cold
1749coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1750{
1751 /* called when perl clones the current process the slow way (windows process emulation) */
1752 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1753 mg->mg_ptr = 0;
1754 mg->mg_virtual = 0;
1755
1756 return 0;
1757}
1758
1759static MGVTBL coro_state_vtbl = {
1760 0, 0, 0, 0,
1761 coro_state_free,
1762 0,
1763#ifdef MGf_DUP
1764 coro_state_dup,
1765#else
1766# define MGf_DUP 0
1767#endif
1768};
1769
1770static void
1771prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1772{
1773 ta->prev = SvSTATE (prev_sv);
1774 ta->next = SvSTATE (next_sv);
1775 TRANSFER_CHECK (*ta);
1776}
1777
1778static void
1779api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1780{
1781 struct coro_transfer_args ta;
1782
1783 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1784 TRANSFER (ta, 1);
1785}
1786
1787/** Coro ********************************************************************/
1788
1789ecb_inline void
1790coro_enq (pTHX_ struct coro *coro)
1791{
1792 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1793
1794 SvREFCNT_inc_NN (coro->hv);
1795
1796 coro->next_ready = 0;
1797 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1798 ready [1] = coro;
1799}
1800
1801ecb_inline struct coro *
1802coro_deq (pTHX)
1803{
1804 int prio;
1805
1806 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1807 {
1808 struct coro **ready = coro_ready [prio];
1809
1810 if (ready [0])
1811 {
1812 struct coro *coro = ready [0];
1813 ready [0] = coro->next_ready;
1814 return coro;
1815 }
1816 }
1817
1818 return 0;
1819}
1820
1821static void
1822invoke_sv_ready_hook_helper (void)
1823{
1824 dTHX;
1825 dSP;
1826
1827 ENTER;
1828 SAVETMPS;
1829
1830 PUSHMARK (SP);
1831 PUTBACK;
1832 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1833
1834 FREETMPS;
1835 LEAVE;
1836}
1837
1838static int
1839api_ready (pTHX_ SV *coro_sv)
1840{
1841 struct coro *coro = SvSTATE (coro_sv);
1842
1843 if (coro->flags & CF_READY)
1844 return 0;
1845
1846 coro->flags |= CF_READY;
1847
1848 coro_enq (aTHX_ coro);
1849
1850 if (!coro_nready++)
1851 if (coroapi.readyhook)
1852 coroapi.readyhook ();
1853
1854 return 1;
1855}
1856
1857static int
1858api_is_ready (pTHX_ SV *coro_sv)
1859{
1860 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1861}
1862
1863/* expects to own a reference to next->hv */
1864ecb_inline void
1865prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1866{
1867 SV *prev_sv = SvRV (coro_current);
1868
1869 ta->prev = SvSTATE_hv (prev_sv);
1870 ta->next = next;
1871
1872 TRANSFER_CHECK (*ta);
1873
1874 SvRV_set (coro_current, (SV *)next->hv);
1875
1876 free_coro_mortal (aTHX);
1877 coro_mortal = prev_sv;
1878}
1879
1880static void
1881prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1882{
1883 for (;;)
1884 {
1885 struct coro *next = coro_deq (aTHX);
1886
1887 if (ecb_expect_true (next))
1888 {
1889 /* cannot transfer to destroyed coros, skip and look for next */
1890 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1891 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1892 else
1893 {
1894 next->flags &= ~CF_READY;
1895 --coro_nready;
1896
1897 prepare_schedule_to (aTHX_ ta, next);
1898 break;
1899 }
1900 }
1901 else
1902 {
1903 /* nothing to schedule: call the idle handler */
1904 if (SvROK (sv_idle)
1905 && SvOBJECT (SvRV (sv_idle)))
1906 {
1907 if (SvRV (sv_idle) == SvRV (coro_current))
1908 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1909
1910 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1911 api_ready (aTHX_ SvRV (sv_idle));
1912 --coro_nready;
1913 }
1914 else
1915 {
1916 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1917 dSP;
1918
1919 ENTER;
1920 SAVETMPS;
1921
1922 PUSHMARK (SP);
1923 PUTBACK;
1924 call_sv (sv_idle, G_VOID | G_DISCARD);
1925
1926 FREETMPS;
1927 LEAVE;
1928 }
1929 }
1930 }
1931}
1932
1933ecb_inline void
1934prepare_cede (pTHX_ struct coro_transfer_args *ta)
1935{
1936 api_ready (aTHX_ coro_current);
1937 prepare_schedule (aTHX_ ta);
1938}
1939
1940ecb_inline void
1941prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1942{
1943 SV *prev = SvRV (coro_current);
1944
1945 if (coro_nready)
1946 {
1947 prepare_schedule (aTHX_ ta);
1948 api_ready (aTHX_ prev);
1949 }
1950 else
1951 prepare_nop (aTHX_ ta);
1952}
1953
1954static void
1955api_schedule (pTHX)
1956{
1957 struct coro_transfer_args ta;
1958
1959 prepare_schedule (aTHX_ &ta);
1960 TRANSFER (ta, 1);
1961}
1962
1963static void
1964api_schedule_to (pTHX_ SV *coro_sv)
1965{
1966 struct coro_transfer_args ta;
1967 struct coro *next = SvSTATE (coro_sv);
1968
1969 SvREFCNT_inc_NN (coro_sv);
1970 prepare_schedule_to (aTHX_ &ta, next);
1971}
1972
1973static int
1974api_cede (pTHX)
1975{
1976 struct coro_transfer_args ta;
1977
1978 prepare_cede (aTHX_ &ta);
1979
1980 if (ecb_expect_true (ta.prev != ta.next))
1981 {
1982 TRANSFER (ta, 1);
1983 return 1;
1984 }
1985 else
1986 return 0;
1987}
1988
1989static int
1990api_cede_notself (pTHX)
1991{
1992 if (coro_nready)
1993 {
1994 struct coro_transfer_args ta;
1995
1996 prepare_cede_notself (aTHX_ &ta);
1997 TRANSFER (ta, 1);
1998 return 1;
1999 }
2000 else
2001 return 0;
2002}
2003
2004static void
2005api_trace (pTHX_ SV *coro_sv, int flags)
2006{
2007 struct coro *coro = SvSTATE (coro_sv);
2008
2009 if (coro->flags & CF_RUNNING)
2010 croak ("cannot enable tracing on a running coroutine, caught");
2011
2012 if (flags & CC_TRACE)
2013 {
2014 if (!coro->cctx)
2015 coro->cctx = cctx_new_run ();
2016 else if (!(coro->cctx->flags & CC_TRACE))
2017 croak ("cannot enable tracing on coroutine with custom stack, caught");
2018
2019 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2020 }
2021 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2022 {
2023 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2024
2025 if (coro->flags & CF_RUNNING)
2026 PL_runops = RUNOPS_DEFAULT;
2027 else
2028 coro->slot->runops = RUNOPS_DEFAULT;
2029 }
2030}
2031
2032static void
2033coro_push_av (pTHX_ AV *av, I32 gimme_v)
2034{
2035 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2036 {
2037 dSP;
2038
2039 if (gimme_v == G_SCALAR)
2040 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2041 else
2042 {
2043 int i;
2044 EXTEND (SP, AvFILLp (av) + 1);
2045
2046 for (i = 0; i <= AvFILLp (av); ++i)
2047 PUSHs (AvARRAY (av)[i]);
2048 }
2049
2050 PUTBACK;
2051 }
2052}
2053
2054static void
2055coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2056{
2057 if (!coro->on_destroy)
2058 coro->on_destroy = newAV ();
2059
2060 av_push (coro->on_destroy, cb);
2061}
2062
2063static void
2064slf_destroy_join (pTHX_ struct CoroSLF *frame)
2065{
2066 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2067}
2068
2069static int
2070slf_check_join (pTHX_ struct CoroSLF *frame)
2071{
2072 struct coro *coro = (struct coro *)frame->data;
2073
2074 if (!coro->status)
2075 return 1;
2076
2077 frame->destroy = 0;
2078
2079 coro_push_av (aTHX_ coro->status, GIMME_V);
2080
2081 SvREFCNT_dec ((SV *)coro->hv);
2082
2083 return 0;
2084}
2085
2086static void
2087slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2088{
2089 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2090
2091 if (items > 1)
2092 croak ("join called with too many arguments");
2093
2094 if (coro->status)
2095 frame->prepare = prepare_nop;
2096 else
2097 {
2098 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2099 frame->prepare = prepare_schedule;
2100 }
2101
2102 frame->check = slf_check_join;
2103 frame->destroy = slf_destroy_join;
2104 frame->data = (void *)coro;
2105 SvREFCNT_inc (coro->hv);
2106}
2107
2108static void
2109coro_call_on_destroy (pTHX_ struct coro *coro)
2110{
2111 AV *od = coro->on_destroy;
2112
2113 if (!od)
2114 return;
2115
2116 coro->on_destroy = 0;
2117 sv_2mortal ((SV *)od);
2118
2119 while (AvFILLp (od) >= 0)
2120 {
2121 SV *cb = sv_2mortal (av_pop (od));
2122
2123 /* coro hv's (and only hv's at the moment) are supported as well */
2124 if (SvSTATEhv_p (aTHX_ cb))
2125 api_ready (aTHX_ cb);
2126 else
2127 {
2128 dSP; /* don't disturb outer sp */
495 PUSHMARK(SP); 2129 PUSHMARK (SP);
496 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); 2130
497 /* 2131 if (coro->status)
498 * the next line is slightly wrong, as PL_op->op_next
499 * is actually being executed so we skip the first op.
500 * that doesn't matter, though, since it is only
501 * pp_nextstate and we never return...
502 * ah yes, and I don't care anyways ;)
503 */ 2132 {
2133 PUTBACK;
2134 coro_push_av (aTHX_ coro->status, G_ARRAY);
2135 SPAGAIN;
2136 }
2137
504 PUTBACK; 2138 PUTBACK;
505 PL_op = pp_entersub(aTHX); 2139 call_sv (cb, G_VOID | G_DISCARD);
506 SPAGAIN;
507
508 ENTER; /* necessary e.g. for dounwind */
509 } 2140 }
510 } 2141 }
511} 2142}
512 2143
2144static void
2145coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2146{
2147 AV *av;
2148
2149 if (coro->status)
2150 {
2151 av = coro->status;
2152 av_clear (av);
2153 }
2154 else
2155 av = coro->status = newAV ();
2156
2157 /* items are actually not so common, so optimise for this case */
2158 if (items)
2159 {
2160 int i;
2161
2162 av_extend (av, items - 1);
2163
2164 for (i = 0; i < items; ++i)
2165 av_push (av, SvREFCNT_inc_NN (arg [i]));
2166 }
2167}
2168
2169static void
2170slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2171{
2172 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2173 api_ready (aTHX_ sv_manager);
2174
2175 frame->prepare = prepare_schedule;
2176 frame->check = slf_check_repeat;
2177
2178 /* as a minor optimisation, we could unwind all stacks here */
2179 /* but that puts extra pressure on pp_slf, and is not worth much */
2180 /*coro_unwind_stacks (aTHX);*/
2181}
2182
2183static void
2184slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2185{
2186 HV *coro_hv = (HV *)SvRV (coro_current);
2187
2188 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2189 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2190}
2191
2192static void
2193slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv;
2196 struct coro *coro;
2197
2198 if (items <= 0)
2199 croak ("Coro::cancel called without coro object,");
2200
2201 coro = SvSTATE (arg [0]);
2202 coro_hv = coro->hv;
2203
2204 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2205
2206 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2207 {
2208 /* coro currently busy cancelling something, so just notify it */
2209 coro->slf_frame.data = (void *)coro;
2210
2211 frame->prepare = prepare_nop;
2212 frame->check = slf_check_nop;
2213 }
2214 else if (coro_hv == (HV *)SvRV (coro_current))
2215 {
2216 /* cancelling the current coro is allowed, and equals terminate */
2217 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2218 }
2219 else
2220 {
2221 struct coro *self = SvSTATE_current;
2222
2223 /* otherwise we cancel directly, purely for speed reasons
2224 * unfortunately, this requires some magic trickery, as
2225 * somebody else could cancel us, so we have to fight the cancellation.
2226 * this is ugly, and hopefully fully worth the extra speed.
2227 * besides, I can't get the slow-but-safe version working...
2228 */
2229 slf_frame.data = 0;
2230 self->flags |= CF_NOCANCEL;
2231 coro_state_destroy (aTHX_ coro);
2232 self->flags &= ~CF_NOCANCEL;
2233
2234 if (slf_frame.data)
2235 {
2236 /* while we were busy we have been cancelled, so terminate */
2237 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2238 }
2239 else
2240 {
2241 frame->prepare = prepare_nop;
2242 frame->check = slf_check_nop;
2243 }
2244 }
2245}
2246
2247static int
2248slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2249{
2250 frame->prepare = 0;
2251 coro_unwind_stacks (aTHX);
2252
2253 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2254
2255 return 1;
2256}
2257
2258static int
2259safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2260{
2261 if (coro->cctx)
2262 croak ("coro inside C callback, unable to cancel at this time, caught");
2263
2264 if (coro->flags & CF_NEW)
2265 {
2266 coro_set_status (aTHX_ coro, arg, items);
2267 coro_state_destroy (aTHX_ coro);
2268 }
2269 else
2270 {
2271 if (!coro->slf_frame.prepare)
2272 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2273
2274 slf_destroy (aTHX_ coro);
2275
2276 coro_set_status (aTHX_ coro, arg, items);
2277 coro->slf_frame.prepare = prepare_nop;
2278 coro->slf_frame.check = slf_check_safe_cancel;
2279
2280 api_ready (aTHX_ (SV *)coro->hv);
2281 }
2282
2283 return 1;
2284}
2285
2286/*****************************************************************************/
2287/* async pool handler */
2288
2289static int
2290slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2291{
2292 HV *hv = (HV *)SvRV (coro_current);
2293 struct coro *coro = (struct coro *)frame->data;
2294
2295 if (!coro->invoke_cb)
2296 return 1; /* loop till we have invoke */
2297 else
2298 {
2299 hv_store (hv, "desc", sizeof ("desc") - 1,
2300 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2301
2302 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2303
2304 {
2305 dSP;
2306 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2307 PUTBACK;
2308 }
2309
2310 SvREFCNT_dec (GvAV (PL_defgv));
2311 GvAV (PL_defgv) = coro->invoke_av;
2312 coro->invoke_av = 0;
2313
2314 return 0;
2315 }
2316}
2317
2318static void
2319slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2320{
2321 HV *hv = (HV *)SvRV (coro_current);
2322 struct coro *coro = SvSTATE_hv ((SV *)hv);
2323
2324 if (ecb_expect_true (coro->saved_deffh))
2325 {
2326 /* subsequent iteration */
2327 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2328 coro->saved_deffh = 0;
2329
2330 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2331 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2332 {
2333 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2334 return;
2335 }
2336 else
2337 {
2338 av_clear (GvAV (PL_defgv));
2339 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2340
2341 coro->prio = 0;
2342
2343 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2344 api_trace (aTHX_ coro_current, 0);
2345
2346 frame->prepare = prepare_schedule;
2347 av_push (av_async_pool, SvREFCNT_inc (hv));
2348 }
2349 }
2350 else
2351 {
2352 /* first iteration, simply fall through */
2353 frame->prepare = prepare_nop;
2354 }
2355
2356 frame->check = slf_check_pool_handler;
2357 frame->data = (void *)coro;
2358}
2359
2360/*****************************************************************************/
2361/* rouse callback */
2362
2363#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2364
2365static void
2366coro_rouse_callback (pTHX_ CV *cv)
2367{
2368 dXSARGS;
2369 SV *data = (SV *)S_GENSUB_ARG;
2370
2371 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2372 {
2373 /* first call, set args */
2374 SV *coro = SvRV (data);
2375 AV *av = newAV ();
2376
2377 SvRV_set (data, (SV *)av);
2378
2379 /* better take a full copy of the arguments */
2380 while (items--)
2381 av_store (av, items, newSVsv (ST (items)));
2382
2383 api_ready (aTHX_ coro);
2384 SvREFCNT_dec (coro);
2385 }
2386
2387 XSRETURN_EMPTY;
2388}
2389
2390static int
2391slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2392{
2393 SV *data = (SV *)frame->data;
2394
2395 if (CORO_THROW)
2396 return 0;
2397
2398 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2399 return 1;
2400
2401 /* now push all results on the stack */
2402 {
2403 dSP;
2404 AV *av = (AV *)SvRV (data);
2405 int i;
2406
2407 EXTEND (SP, AvFILLp (av) + 1);
2408 for (i = 0; i <= AvFILLp (av); ++i)
2409 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2410
2411 /* we have stolen the elements, so set length to zero and free */
2412 AvFILLp (av) = -1;
2413 av_undef (av);
2414
2415 PUTBACK;
2416 }
2417
2418 return 0;
2419}
2420
2421static void
2422slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 SV *cb;
2425
2426 if (items)
2427 cb = arg [0];
2428 else
2429 {
2430 struct coro *coro = SvSTATE_current;
2431
2432 if (!coro->rouse_cb)
2433 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2434
2435 cb = sv_2mortal (coro->rouse_cb);
2436 coro->rouse_cb = 0;
2437 }
2438
2439 if (!SvROK (cb)
2440 || SvTYPE (SvRV (cb)) != SVt_PVCV
2441 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2442 croak ("Coro::rouse_wait called with illegal callback argument,");
2443
2444 {
2445 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2446 SV *data = (SV *)S_GENSUB_ARG;
2447
2448 frame->data = (void *)data;
2449 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2450 frame->check = slf_check_rouse_wait;
2451 }
2452}
2453
2454static SV *
2455coro_new_rouse_cb (pTHX)
2456{
2457 HV *hv = (HV *)SvRV (coro_current);
2458 struct coro *coro = SvSTATE_hv (hv);
2459 SV *data = newRV_inc ((SV *)hv);
2460 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2461
2462 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2463 SvREFCNT_dec (data); /* magicext increases the refcount */
2464
2465 SvREFCNT_dec (coro->rouse_cb);
2466 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2467
2468 return cb;
2469}
2470
2471/*****************************************************************************/
2472/* schedule-like-function opcode (SLF) */
2473
2474static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2475static const CV *slf_cv;
2476static SV **slf_argv;
2477static int slf_argc, slf_arga; /* count, allocated */
2478static I32 slf_ax; /* top of stack, for restore */
2479
2480/* this restores the stack in the case we patched the entersub, to */
2481/* recreate the stack frame as perl will on following calls */
2482/* since entersub cleared the stack */
2483static OP *
2484pp_restore (pTHX)
2485{
2486 int i;
2487 SV **SP = PL_stack_base + slf_ax;
2488
2489 PUSHMARK (SP);
2490
2491 EXTEND (SP, slf_argc + 1);
2492
2493 for (i = 0; i < slf_argc; ++i)
2494 PUSHs (sv_2mortal (slf_argv [i]));
2495
2496 PUSHs ((SV *)CvGV (slf_cv));
2497
2498 RETURNOP (slf_restore.op_first);
2499}
2500
2501static void
2502slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2503{
2504 SV **arg = (SV **)slf_frame.data;
2505
2506 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2507}
2508
2509static void
2510slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2511{
2512 if (items != 2)
2513 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2514
2515 frame->prepare = slf_prepare_transfer;
2516 frame->check = slf_check_nop;
2517 frame->data = (void *)arg; /* let's hope it will stay valid */
2518}
2519
2520static void
2521slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2522{
2523 frame->prepare = prepare_schedule;
2524 frame->check = slf_check_nop;
2525}
2526
2527static void
2528slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2529{
2530 struct coro *next = (struct coro *)slf_frame.data;
2531
2532 SvREFCNT_inc_NN (next->hv);
2533 prepare_schedule_to (aTHX_ ta, next);
2534}
2535
2536static void
2537slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2538{
2539 if (!items)
2540 croak ("Coro::schedule_to expects a coroutine argument, caught");
2541
2542 frame->data = (void *)SvSTATE (arg [0]);
2543 frame->prepare = slf_prepare_schedule_to;
2544 frame->check = slf_check_nop;
2545}
2546
2547static void
2548slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 api_ready (aTHX_ SvRV (coro_current));
2551
2552 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2553}
2554
2555static void
2556slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2557{
2558 frame->prepare = prepare_cede;
2559 frame->check = slf_check_nop;
2560}
2561
2562static void
2563slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2564{
2565 frame->prepare = prepare_cede_notself;
2566 frame->check = slf_check_nop;
2567}
2568
2569/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2570static void
2571slf_destroy (pTHX_ struct coro *coro)
2572{
2573 /* this callback is reserved for slf functions needing to do cleanup */
2574 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2575 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2576
2577 /*
2578 * The on_destroy above most likely is from an SLF call.
2579 * Since by definition the SLF call will not finish when we destroy
2580 * the coro, we will have to force-finish it here, otherwise
2581 * cleanup functions cannot call SLF functions.
2582 */
2583 coro->slf_frame.prepare = 0;
2584}
2585
2586/*
2587 * these not obviously related functions are all rolled into one
2588 * function to increase chances that they all will call transfer with the same
2589 * stack offset
2590 * SLF stands for "schedule-like-function".
2591 */
2592static OP *
2593pp_slf (pTHX)
2594{
2595 I32 checkmark; /* mark SP to see how many elements check has pushed */
2596
2597 /* set up the slf frame, unless it has already been set-up */
2598 /* the latter happens when a new coro has been started */
2599 /* or when a new cctx was attached to an existing coroutine */
2600 if (ecb_expect_true (!slf_frame.prepare))
2601 {
2602 /* first iteration */
2603 dSP;
2604 SV **arg = PL_stack_base + TOPMARK + 1;
2605 int items = SP - arg; /* args without function object */
2606 SV *gv = *sp;
2607
2608 /* do a quick consistency check on the "function" object, and if it isn't */
2609 /* for us, divert to the real entersub */
2610 if (SvTYPE (gv) != SVt_PVGV
2611 || !GvCV (gv)
2612 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2613 return PL_ppaddr[OP_ENTERSUB](aTHX);
2614
2615 if (!(PL_op->op_flags & OPf_STACKED))
2616 {
2617 /* ampersand-form of call, use @_ instead of stack */
2618 AV *av = GvAV (PL_defgv);
2619 arg = AvARRAY (av);
2620 items = AvFILLp (av) + 1;
2621 }
2622
2623 /* now call the init function, which needs to set up slf_frame */
2624 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2625 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2626
2627 /* pop args */
2628 SP = PL_stack_base + POPMARK;
2629
2630 PUTBACK;
2631 }
2632
2633 /* now that we have a slf_frame, interpret it! */
2634 /* we use a callback system not to make the code needlessly */
2635 /* complicated, but so we can run multiple perl coros from one cctx */
2636
2637 do
2638 {
2639 struct coro_transfer_args ta;
2640
2641 slf_frame.prepare (aTHX_ &ta);
2642 TRANSFER (ta, 0);
2643
2644 checkmark = PL_stack_sp - PL_stack_base;
2645 }
2646 while (slf_frame.check (aTHX_ &slf_frame));
2647
2648 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2649
2650 /* exception handling */
2651 if (ecb_expect_false (CORO_THROW))
2652 {
2653 SV *exception = sv_2mortal (CORO_THROW);
2654
2655 CORO_THROW = 0;
2656 sv_setsv (ERRSV, exception);
2657 croak (0);
2658 }
2659
2660 /* return value handling - mostly like entersub */
2661 /* make sure we put something on the stack in scalar context */
2662 if (GIMME_V == G_SCALAR
2663 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2664 {
2665 dSP;
2666 SV **bot = PL_stack_base + checkmark;
2667
2668 if (sp == bot) /* too few, push undef */
2669 bot [1] = &PL_sv_undef;
2670 else /* too many, take last one */
2671 bot [1] = *sp;
2672
2673 SP = bot + 1;
2674
2675 PUTBACK;
2676 }
2677
2678 return NORMAL;
2679}
2680
2681static void
2682api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2683{
2684 int i;
2685 SV **arg = PL_stack_base + ax;
2686 int items = PL_stack_sp - arg + 1;
2687
2688 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2689
2690 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2691 && PL_op->op_ppaddr != pp_slf)
2692 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2693
2694 CvFLAGS (cv) |= CVf_SLF;
2695 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2696 slf_cv = cv;
2697
2698 /* we patch the op, and then re-run the whole call */
2699 /* we have to put the same argument on the stack for this to work */
2700 /* and this will be done by pp_restore */
2701 slf_restore.op_next = (OP *)&slf_restore;
2702 slf_restore.op_type = OP_CUSTOM;
2703 slf_restore.op_ppaddr = pp_restore;
2704 slf_restore.op_first = PL_op;
2705
2706 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2707
2708 if (PL_op->op_flags & OPf_STACKED)
2709 {
2710 if (items > slf_arga)
2711 {
2712 slf_arga = items;
2713 Safefree (slf_argv);
2714 New (0, slf_argv, slf_arga, SV *);
2715 }
2716
2717 slf_argc = items;
2718
2719 for (i = 0; i < items; ++i)
2720 slf_argv [i] = SvREFCNT_inc (arg [i]);
2721 }
2722 else
2723 slf_argc = 0;
2724
2725 PL_op->op_ppaddr = pp_slf;
2726 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2727
2728 PL_op = (OP *)&slf_restore;
2729}
2730
2731/*****************************************************************************/
2732/* dynamic wind */
2733
2734static void
2735on_enterleave_call (pTHX_ SV *cb)
2736{
2737 dSP;
2738
2739 PUSHSTACK;
2740
2741 PUSHMARK (SP);
2742 PUTBACK;
2743 call_sv (cb, G_VOID | G_DISCARD);
2744 SPAGAIN;
2745
2746 POPSTACK;
2747}
2748
2749static SV *
2750coro_avp_pop_and_free (pTHX_ AV **avp)
2751{
2752 AV *av = *avp;
2753 SV *res = av_pop (av);
2754
2755 if (AvFILLp (av) < 0)
2756 {
2757 *avp = 0;
2758 SvREFCNT_dec (av);
2759 }
2760
2761 return res;
2762}
2763
2764static void
2765coro_pop_on_enter (pTHX_ void *coro)
2766{
2767 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2768 SvREFCNT_dec (cb);
2769}
2770
2771static void
2772coro_pop_on_leave (pTHX_ void *coro)
2773{
2774 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2775 on_enterleave_call (aTHX_ sv_2mortal (cb));
2776}
2777
2778/*****************************************************************************/
2779/* PerlIO::cede */
2780
2781typedef struct
2782{
2783 PerlIOBuf base;
2784 NV next, every;
2785} PerlIOCede;
2786
2787static IV ecb_cold
2788PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2789{
2790 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2791
2792 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2793 self->next = nvtime () + self->every;
2794
2795 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2796}
2797
2798static SV * ecb_cold
2799PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2800{
2801 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2802
2803 return newSVnv (self->every);
2804}
2805
2806static IV
2807PerlIOCede_flush (pTHX_ PerlIO *f)
2808{
2809 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2810 double now = nvtime ();
2811
2812 if (now >= self->next)
2813 {
2814 api_cede (aTHX);
2815 self->next = now + self->every;
2816 }
2817
2818 return PerlIOBuf_flush (aTHX_ f);
2819}
2820
2821static PerlIO_funcs PerlIO_cede =
2822{
2823 sizeof(PerlIO_funcs),
2824 "cede",
2825 sizeof(PerlIOCede),
2826 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2827 PerlIOCede_pushed,
2828 PerlIOBuf_popped,
2829 PerlIOBuf_open,
2830 PerlIOBase_binmode,
2831 PerlIOCede_getarg,
2832 PerlIOBase_fileno,
2833 PerlIOBuf_dup,
2834 PerlIOBuf_read,
2835 PerlIOBuf_unread,
2836 PerlIOBuf_write,
2837 PerlIOBuf_seek,
2838 PerlIOBuf_tell,
2839 PerlIOBuf_close,
2840 PerlIOCede_flush,
2841 PerlIOBuf_fill,
2842 PerlIOBase_eof,
2843 PerlIOBase_error,
2844 PerlIOBase_clearerr,
2845 PerlIOBase_setlinebuf,
2846 PerlIOBuf_get_base,
2847 PerlIOBuf_bufsiz,
2848 PerlIOBuf_get_ptr,
2849 PerlIOBuf_get_cnt,
2850 PerlIOBuf_set_ptrcnt,
2851};
2852
2853/*****************************************************************************/
2854/* Coro::Semaphore & Coro::Signal */
2855
2856static SV *
2857coro_waitarray_new (pTHX_ int count)
2858{
2859 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2860 AV *av = newAV ();
2861 SV **ary;
2862
2863 /* unfortunately, building manually saves memory */
2864 Newx (ary, 2, SV *);
2865 AvALLOC (av) = ary;
2866#if PERL_VERSION_ATLEAST (5,10,0)
2867 AvARRAY (av) = ary;
2868#else
2869 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2870 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2871 SvPVX ((SV *)av) = (char *)ary;
2872#endif
2873 AvMAX (av) = 1;
2874 AvFILLp (av) = 0;
2875 ary [0] = newSViv (count);
2876
2877 return newRV_noinc ((SV *)av);
2878}
2879
2880/* semaphore */
2881
2882static void
2883coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2884{
2885 SV *count_sv = AvARRAY (av)[0];
2886 IV count = SvIVX (count_sv);
2887
2888 count += adjust;
2889 SvIVX (count_sv) = count;
2890
2891 /* now wake up as many waiters as are expected to lock */
2892 while (count > 0 && AvFILLp (av) > 0)
2893 {
2894 SV *cb;
2895
2896 /* swap first two elements so we can shift a waiter */
2897 AvARRAY (av)[0] = AvARRAY (av)[1];
2898 AvARRAY (av)[1] = count_sv;
2899 cb = av_shift (av);
2900
2901 if (SvOBJECT (cb))
2902 {
2903 api_ready (aTHX_ cb);
2904 --count;
2905 }
2906 else if (SvTYPE (cb) == SVt_PVCV)
2907 {
2908 dSP;
2909 PUSHMARK (SP);
2910 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2911 PUTBACK;
2912 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2913 }
2914
2915 SvREFCNT_dec (cb);
2916 }
2917}
2918
2919static void
2920coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2921{
2922 /* call $sem->adjust (0) to possibly wake up some other waiters */
2923 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2924}
2925
2926static int
2927slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2928{
2929 AV *av = (AV *)frame->data;
2930 SV *count_sv = AvARRAY (av)[0];
2931 SV *coro_hv = SvRV (coro_current);
2932
2933 /* if we are about to throw, don't actually acquire the lock, just throw */
2934 if (CORO_THROW)
2935 return 0;
2936 else if (SvIVX (count_sv) > 0)
2937 {
2938 frame->destroy = 0;
2939
2940 if (acquire)
2941 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2942 else
2943 coro_semaphore_adjust (aTHX_ av, 0);
2944
2945 return 0;
2946 }
2947 else
2948 {
2949 int i;
2950 /* if we were woken up but can't down, we look through the whole */
2951 /* waiters list and only add us if we aren't in there already */
2952 /* this avoids some degenerate memory usage cases */
2953 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2954 if (AvARRAY (av)[i] == coro_hv)
2955 return 1;
2956
2957 av_push (av, SvREFCNT_inc (coro_hv));
2958 return 1;
2959 }
2960}
2961
2962static int
2963slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2964{
2965 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2966}
2967
2968static int
2969slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2970{
2971 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2972}
2973
2974static void
2975slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2976{
2977 AV *av = (AV *)SvRV (arg [0]);
2978
2979 if (SvIVX (AvARRAY (av)[0]) > 0)
2980 {
2981 frame->data = (void *)av;
2982 frame->prepare = prepare_nop;
2983 }
2984 else
2985 {
2986 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2987
2988 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2989 frame->prepare = prepare_schedule;
2990 /* to avoid race conditions when a woken-up coro gets terminated */
2991 /* we arrange for a temporary on_destroy that calls adjust (0) */
2992 frame->destroy = coro_semaphore_destroy;
2993 }
2994}
2995
2996static void
2997slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2998{
2999 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3000 frame->check = slf_check_semaphore_down;
3001}
3002
3003static void
3004slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3005{
3006 if (items >= 2)
3007 {
3008 /* callback form */
3009 AV *av = (AV *)SvRV (arg [0]);
3010 SV *cb_cv = s_get_cv_croak (arg [1]);
3011
3012 av_push (av, SvREFCNT_inc_NN (cb_cv));
3013
3014 if (SvIVX (AvARRAY (av)[0]) > 0)
3015 coro_semaphore_adjust (aTHX_ av, 0);
3016
3017 frame->prepare = prepare_nop;
3018 frame->check = slf_check_nop;
3019 }
3020 else
3021 {
3022 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3023 frame->check = slf_check_semaphore_wait;
3024 }
3025}
3026
3027/* signal */
3028
3029static void
3030coro_signal_wake (pTHX_ AV *av, int count)
3031{
3032 SvIVX (AvARRAY (av)[0]) = 0;
3033
3034 /* now signal count waiters */
3035 while (count > 0 && AvFILLp (av) > 0)
3036 {
3037 SV *cb;
3038
3039 /* swap first two elements so we can shift a waiter */
3040 cb = AvARRAY (av)[0];
3041 AvARRAY (av)[0] = AvARRAY (av)[1];
3042 AvARRAY (av)[1] = cb;
3043
3044 cb = av_shift (av);
3045
3046 if (SvTYPE (cb) == SVt_PVCV)
3047 {
3048 dSP;
3049 PUSHMARK (SP);
3050 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3051 PUTBACK;
3052 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3053 }
3054 else
3055 {
3056 api_ready (aTHX_ cb);
3057 sv_setiv (cb, 0); /* signal waiter */
3058 }
3059
3060 SvREFCNT_dec (cb);
3061
3062 --count;
3063 }
3064}
3065
3066static int
3067slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3068{
3069 /* if we are about to throw, also stop waiting */
3070 return SvROK ((SV *)frame->data) && !CORO_THROW;
3071}
3072
3073static void
3074slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3075{
3076 AV *av = (AV *)SvRV (arg [0]);
3077
3078 if (items >= 2)
3079 {
3080 SV *cb_cv = s_get_cv_croak (arg [1]);
3081 av_push (av, SvREFCNT_inc_NN (cb_cv));
3082
3083 if (SvIVX (AvARRAY (av)[0]))
3084 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3085
3086 frame->prepare = prepare_nop;
3087 frame->check = slf_check_nop;
3088 }
3089 else if (SvIVX (AvARRAY (av)[0]))
3090 {
3091 SvIVX (AvARRAY (av)[0]) = 0;
3092 frame->prepare = prepare_nop;
3093 frame->check = slf_check_nop;
3094 }
3095 else
3096 {
3097 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3098
3099 av_push (av, waiter);
3100
3101 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3102 frame->prepare = prepare_schedule;
3103 frame->check = slf_check_signal_wait;
3104 }
3105}
3106
3107/*****************************************************************************/
3108/* Coro::AIO */
3109
3110#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3111
3112/* helper storage struct */
3113struct io_state
3114{
3115 int errorno;
3116 I32 laststype; /* U16 in 5.10.0 */
3117 int laststatval;
3118 Stat_t statcache;
3119};
3120
3121static void
3122coro_aio_callback (pTHX_ CV *cv)
3123{
3124 dXSARGS;
3125 AV *state = (AV *)S_GENSUB_ARG;
3126 SV *coro = av_pop (state);
3127 SV *data_sv = newSV (sizeof (struct io_state));
3128
3129 av_extend (state, items - 1);
3130
3131 sv_upgrade (data_sv, SVt_PV);
3132 SvCUR_set (data_sv, sizeof (struct io_state));
3133 SvPOK_only (data_sv);
3134
3135 {
3136 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3137
3138 data->errorno = errno;
3139 data->laststype = PL_laststype;
3140 data->laststatval = PL_laststatval;
3141 data->statcache = PL_statcache;
3142 }
3143
3144 /* now build the result vector out of all the parameters and the data_sv */
3145 {
3146 int i;
3147
3148 for (i = 0; i < items; ++i)
3149 av_push (state, SvREFCNT_inc_NN (ST (i)));
3150 }
3151
3152 av_push (state, data_sv);
3153
3154 api_ready (aTHX_ coro);
3155 SvREFCNT_dec (coro);
3156 SvREFCNT_dec ((AV *)state);
3157}
3158
3159static int
3160slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3161{
3162 AV *state = (AV *)frame->data;
3163
3164 /* if we are about to throw, return early */
3165 /* this does not cancel the aio request, but at least */
3166 /* it quickly returns */
3167 if (CORO_THROW)
3168 return 0;
3169
3170 /* one element that is an RV? repeat! */
3171 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3172 return 1;
3173
3174 /* restore status */
3175 {
3176 SV *data_sv = av_pop (state);
3177 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3178
3179 errno = data->errorno;
3180 PL_laststype = data->laststype;
3181 PL_laststatval = data->laststatval;
3182 PL_statcache = data->statcache;
3183
3184 SvREFCNT_dec (data_sv);
3185 }
3186
3187 /* push result values */
3188 {
3189 dSP;
3190 int i;
3191
3192 EXTEND (SP, AvFILLp (state) + 1);
3193 for (i = 0; i <= AvFILLp (state); ++i)
3194 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3195
3196 PUTBACK;
3197 }
3198
3199 return 0;
3200}
3201
3202static void
3203slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3204{
3205 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3206 SV *coro_hv = SvRV (coro_current);
3207 struct coro *coro = SvSTATE_hv (coro_hv);
3208
3209 /* put our coroutine id on the state arg */
3210 av_push (state, SvREFCNT_inc_NN (coro_hv));
3211
3212 /* first see whether we have a non-zero priority and set it as AIO prio */
3213 if (coro->prio)
3214 {
3215 dSP;
3216
3217 static SV *prio_cv;
3218 static SV *prio_sv;
3219
3220 if (ecb_expect_false (!prio_cv))
3221 {
3222 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3223 prio_sv = newSViv (0);
3224 }
3225
3226 PUSHMARK (SP);
3227 sv_setiv (prio_sv, coro->prio);
3228 XPUSHs (prio_sv);
3229
3230 PUTBACK;
3231 call_sv (prio_cv, G_VOID | G_DISCARD);
3232 }
3233
3234 /* now call the original request */
3235 {
3236 dSP;
3237 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3238 int i;
3239
3240 PUSHMARK (SP);
3241
3242 /* first push all args to the stack */
3243 EXTEND (SP, items + 1);
3244
3245 for (i = 0; i < items; ++i)
3246 PUSHs (arg [i]);
3247
3248 /* now push the callback closure */
3249 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3250
3251 /* now call the AIO function - we assume our request is uncancelable */
3252 PUTBACK;
3253 call_sv ((SV *)req, G_VOID | G_DISCARD);
3254 }
3255
3256 /* now that the request is going, we loop till we have a result */
3257 frame->data = (void *)state;
3258 frame->prepare = prepare_schedule;
3259 frame->check = slf_check_aio_req;
3260}
3261
3262static void
3263coro_aio_req_xs (pTHX_ CV *cv)
3264{
3265 dXSARGS;
3266
3267 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3268
3269 XSRETURN_EMPTY;
3270}
3271
3272/*****************************************************************************/
3273
3274#if CORO_CLONE
3275# include "clone.c"
3276#endif
3277
3278/*****************************************************************************/
3279
3280static SV *
3281coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3282{
3283 SV *coro_sv;
3284 struct coro *coro;
3285 MAGIC *mg;
3286 HV *hv;
3287 SV *cb;
3288 int i;
3289
3290 if (argc > 0)
3291 {
3292 cb = s_get_cv_croak (argv [0]);
3293
3294 if (!is_coro)
3295 {
3296 if (CvISXSUB (cb))
3297 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3298
3299 if (!CvROOT (cb))
3300 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3301 }
3302 }
3303
3304 Newz (0, coro, 1, struct coro);
3305 coro->args = newAV ();
3306 coro->flags = CF_NEW;
3307
3308 if (coro_first) coro_first->prev = coro;
3309 coro->next = coro_first;
3310 coro_first = coro;
3311
3312 coro->hv = hv = newHV ();
3313 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3314 mg->mg_flags |= MGf_DUP;
3315 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3316
3317 if (argc > 0)
3318 {
3319 av_extend (coro->args, argc + is_coro - 1);
3320
3321 if (is_coro)
3322 {
3323 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3324 cb = (SV *)cv_coro_run;
3325 }
3326
3327 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3328
3329 for (i = 1; i < argc; i++)
3330 av_push (coro->args, newSVsv (argv [i]));
3331 }
3332
3333 return coro_sv;
3334}
3335
3336#ifndef __cplusplus
3337ecb_cold XS(boot_Coro__State);
3338#endif
3339
3340#if CORO_JIT
3341
3342static void ecb_noinline ecb_cold
3343pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3344{
3345 dSP;
3346 AV *av = newAV ();
3347
3348 av_store (av, 3, newSVuv (d));
3349 av_store (av, 2, newSVuv (c));
3350 av_store (av, 1, newSVuv (b));
3351 av_store (av, 0, newSVuv (a));
3352
3353 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3354
3355 PUTBACK;
3356}
3357
3358static void ecb_noinline ecb_cold
3359jit_init (pTHX)
3360{
3361 dSP;
3362 SV *load, *save;
3363 char *map_base;
3364 char *load_ptr, *save_ptr;
3365 STRLEN load_len, save_len, map_len;
3366 int count;
3367
3368 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3369
3370 PUSHMARK (SP);
3371 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3372 #include "state.h"
3373 count = call_pv ("Coro::State::_jit", G_ARRAY);
3374 SPAGAIN;
3375
3376 save = POPs; save_ptr = SvPVbyte (save, save_len);
3377 load = POPs; load_ptr = SvPVbyte (load, load_len);
3378
3379 map_len = load_len + save_len + 16;
3380
3381 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3382
3383 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3384
3385 load_perl_slots = (load_save_perl_slots_type)map_base;
3386 memcpy (map_base, load_ptr, load_len);
3387
3388 map_base += (load_len + 15) & ~15;
3389
3390 save_perl_slots = (load_save_perl_slots_type)map_base;
3391 memcpy (map_base, save_ptr, save_len);
3392
3393 /* we are good citizens and try to make the page read-only, so the evil evil */
3394 /* hackers might have it a bit more difficult */
3395 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3396
3397 PUTBACK;
3398 eval_pv ("undef &Coro::State::_jit", 1);
3399}
3400
3401#endif
3402
513MODULE = Coro::State PACKAGE = Coro::State 3403MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
514 3404
515PROTOTYPES: ENABLE 3405PROTOTYPES: DISABLE
516 3406
517BOOT: 3407BOOT:
518{ /* {} necessary for stoopid perl-5.6.x */ 3408{
3409#ifdef USE_ITHREADS
3410# if CORO_PTHREAD
3411 coro_thx = PERL_GET_CONTEXT;
3412# endif
3413#endif
3414 /* perl defines these to check for existance first, but why it doesn't */
3415 /* just create them one at init time is not clear to me, except for */
3416 /* programs trying to delete them, but... */
3417 /* anyway, we declare this as invalid and make sure they are initialised here */
3418 DEFSV;
3419 ERRSV;
3420
3421 cctx_current = cctx_new_empty ();
3422
3423 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3424 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3425
3426 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3427 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3428 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3429
3430 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3431 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3432 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3433
519 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 3434 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
520 3435
521 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 3436 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
522 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 3437 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
523 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 3438 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3439 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
524 3440
525 if (!padlist_cache) 3441 main_mainstack = PL_mainstack;
526 padlist_cache = newHV (); 3442 main_top_env = PL_top_env;
527}
528 3443
529Coro::State 3444 while (main_top_env->je_prev)
530_newprocess(args) 3445 main_top_env = main_top_env->je_prev;
531 SV * args 3446
3447 {
3448 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3449
3450 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3451 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3452
3453 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3454 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3455 }
3456
3457 coroapi.ver = CORO_API_VERSION;
3458 coroapi.rev = CORO_API_REVISION;
3459
3460 coroapi.transfer = api_transfer;
3461
3462 coroapi.sv_state = SvSTATE_;
3463 coroapi.execute_slf = api_execute_slf;
3464 coroapi.prepare_nop = prepare_nop;
3465 coroapi.prepare_schedule = prepare_schedule;
3466 coroapi.prepare_cede = prepare_cede;
3467 coroapi.prepare_cede_notself = prepare_cede_notself;
3468
3469 time_init (aTHX);
3470
3471 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3472#if CORO_JIT
3473 PUTBACK;
3474 jit_init (aTHX);
3475 SPAGAIN;
3476#endif
3477}
3478
3479SV *
3480new (SV *klass, ...)
3481 ALIAS:
3482 Coro::new = 1
3483 CODE:
3484 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3485 OUTPUT:
3486 RETVAL
3487
3488void
3489transfer (...)
3490 PROTOTYPE: $$
3491 CODE:
3492 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3493
3494SV *
3495clone (Coro::State coro)
3496 CODE:
3497{
3498#if CORO_CLONE
3499 struct coro *ncoro = coro_clone (aTHX_ coro);
3500 MAGIC *mg;
3501 /* TODO: too much duplication */
3502 ncoro->hv = newHV ();
3503 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3504 mg->mg_flags |= MGf_DUP;
3505 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3506#else
3507 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3508#endif
3509}
3510 OUTPUT:
3511 RETVAL
3512
3513int
3514cctx_stacksize (int new_stacksize = 0)
3515 PROTOTYPE: ;$
3516 CODE:
3517 RETVAL = cctx_stacksize;
3518 if (new_stacksize)
3519 {
3520 cctx_stacksize = new_stacksize;
3521 ++cctx_gen;
3522 }
3523 OUTPUT:
3524 RETVAL
3525
3526int
3527cctx_max_idle (int max_idle = 0)
3528 PROTOTYPE: ;$
3529 CODE:
3530 RETVAL = cctx_max_idle;
3531 if (max_idle > 1)
3532 cctx_max_idle = max_idle;
3533 OUTPUT:
3534 RETVAL
3535
3536int
3537cctx_count ()
3538 PROTOTYPE:
3539 CODE:
3540 RETVAL = cctx_count;
3541 OUTPUT:
3542 RETVAL
3543
3544int
3545cctx_idle ()
3546 PROTOTYPE:
3547 CODE:
3548 RETVAL = cctx_idle;
3549 OUTPUT:
3550 RETVAL
3551
3552void
3553list ()
3554 PROTOTYPE:
3555 PPCODE:
3556{
3557 struct coro *coro;
3558 for (coro = coro_first; coro; coro = coro->next)
3559 if (coro->hv)
3560 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3561}
3562
3563void
3564call (Coro::State coro, SV *coderef)
3565 ALIAS:
3566 eval = 1
3567 CODE:
3568{
3569 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3570 {
3571 struct coro *current = SvSTATE_current;
3572 struct CoroSLF slf_save;
3573
3574 if (current != coro)
3575 {
3576 PUTBACK;
3577 save_perl (aTHX_ current);
3578 load_perl (aTHX_ coro);
3579 /* the coro is most likely in an active SLF call.
3580 * while not strictly required (the code we execute is
3581 * not allowed to call any SLF functions), it's cleaner
3582 * to reinitialise the slf_frame and restore it later.
3583 * This might one day allow us to actually do SLF calls
3584 * from code executed here.
3585 */
3586 slf_save = slf_frame;
3587 slf_frame.prepare = 0;
3588 SPAGAIN;
3589 }
3590
3591 PUSHSTACK;
3592
3593 PUSHMARK (SP);
3594 PUTBACK;
3595
3596 if (ix)
3597 eval_sv (coderef, 0);
3598 else
3599 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3600
3601 POPSTACK;
3602 SPAGAIN;
3603
3604 if (current != coro)
3605 {
3606 PUTBACK;
3607 slf_frame = slf_save;
3608 save_perl (aTHX_ coro);
3609 load_perl (aTHX_ current);
3610 SPAGAIN;
3611 }
3612 }
3613}
3614
3615SV *
3616is_ready (Coro::State coro)
532 PROTOTYPE: $ 3617 PROTOTYPE: $
3618 ALIAS:
3619 is_ready = CF_READY
3620 is_running = CF_RUNNING
3621 is_new = CF_NEW
3622 is_destroyed = CF_ZOMBIE
3623 is_zombie = CF_ZOMBIE
3624 is_suspended = CF_SUSPENDED
3625 CODE:
3626 RETVAL = boolSV (coro->flags & ix);
3627 OUTPUT:
3628 RETVAL
3629
3630void
3631throw (SV *self, SV *exception = &PL_sv_undef)
3632 PROTOTYPE: $;$
533 CODE: 3633 CODE:
534 Coro__State coro; 3634{
3635 struct coro *coro = SvSTATE (self);
3636 struct coro *current = SvSTATE_current;
3637 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3638 SvREFCNT_dec (*exceptionp);
3639 SvGETMAGIC (exception);
3640 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
535 3641
536 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3642 api_ready (aTHX_ self);
537 croak ("Coro::State::_newprocess expects an arrayref"); 3643}
3644
3645void
3646api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3647 PROTOTYPE: $;$
3648 C_ARGS: aTHX_ coro, flags
3649
3650SV *
3651has_cctx (Coro::State coro)
3652 PROTOTYPE: $
3653 CODE:
3654 /* maybe manage the running flag differently */
3655 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3656 OUTPUT:
3657 RETVAL
3658
3659int
3660is_traced (Coro::State coro)
3661 PROTOTYPE: $
3662 CODE:
3663 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3664 OUTPUT:
3665 RETVAL
3666
3667UV
3668rss (Coro::State coro)
3669 PROTOTYPE: $
3670 ALIAS:
3671 usecount = 1
3672 CODE:
3673 switch (ix)
3674 {
3675 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3676 case 1: RETVAL = coro->usecount; break;
538 3677 }
539 New (0, coro, 1, struct coro); 3678 OUTPUT:
540
541 coro->mainstack = 0; /* actual work is done inside transfer */
542 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
543
544 RETVAL = coro; 3679 RETVAL
3680
3681void
3682force_cctx ()
3683 PROTOTYPE:
3684 CODE:
3685 cctx_current->idle_sp = 0;
3686
3687void
3688swap_defsv (Coro::State self)
3689 PROTOTYPE: $
3690 ALIAS:
3691 swap_defav = 1
3692 CODE:
3693 if (!self->slot)
3694 croak ("cannot swap state with coroutine that has no saved state,");
3695 else
3696 {
3697 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3698 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3699
3700 SV *tmp = *src; *src = *dst; *dst = tmp;
3701 }
3702
3703void
3704cancel (Coro::State self)
3705 CODE:
3706 coro_state_destroy (aTHX_ self);
3707
3708SV *
3709enable_times (int enabled = enable_times)
3710 CODE:
3711{
3712 RETVAL = boolSV (enable_times);
3713
3714 if (enabled != enable_times)
3715 {
3716 enable_times = enabled;
3717
3718 coro_times_update ();
3719 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3720 }
3721}
545 OUTPUT: 3722 OUTPUT:
546 RETVAL 3723 RETVAL
547 3724
548void 3725void
549transfer(prev, next, flags = SAVE_ALL) 3726times (Coro::State self)
550 Coro::State_or_hashref prev 3727 PPCODE:
551 Coro::State_or_hashref next 3728{
552 int flags 3729 struct coro *current = SvSTATE (coro_current);
553 PROTOTYPE: @ 3730
3731 if (ecb_expect_false (current == self))
3732 {
3733 coro_times_update ();
3734 coro_times_add (SvSTATE (coro_current));
3735 }
3736
3737 EXTEND (SP, 2);
3738 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3739 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3740
3741 if (ecb_expect_false (current == self))
3742 coro_times_sub (SvSTATE (coro_current));
3743}
3744
3745void
3746swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3747 CODE:
3748{
3749 struct coro *current = SvSTATE_current;
3750
3751 if (current == coro)
3752 SWAP_SVS (current);
3753
3754 if (!coro->swap_sv)
3755 coro->swap_sv = newAV ();
3756
3757 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3758 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762}
3763
3764
3765MODULE = Coro::State PACKAGE = Coro
3766
3767BOOT:
3768{
3769 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3770 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3771 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3772 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3773 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3774 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3775 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3776 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3777
3778 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3779 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3780 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3781 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3782
3783 coro_stash = gv_stashpv ("Coro", TRUE);
3784
3785 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3786 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3787 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3788 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3789 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3790 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3791
3792 {
3793 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3794
3795 coroapi.schedule = api_schedule;
3796 coroapi.schedule_to = api_schedule_to;
3797 coroapi.cede = api_cede;
3798 coroapi.cede_notself = api_cede_notself;
3799 coroapi.ready = api_ready;
3800 coroapi.is_ready = api_is_ready;
3801 coroapi.nready = coro_nready;
3802 coroapi.current = coro_current;
3803
3804 /*GCoroAPI = &coroapi;*/
3805 sv_setiv (sv, (IV)&coroapi);
3806 SvREADONLY_on (sv);
3807 }
3808}
3809
3810SV *
3811async (...)
3812 PROTOTYPE: &@
554 CODE: 3813 CODE:
555 3814 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
556 transfer (aTHX_ prev, next, flags); 3815 api_ready (aTHX_ RETVAL);
3816 OUTPUT:
3817 RETVAL
557 3818
558void 3819void
559DESTROY(coro) 3820_destroy (Coro::State coro)
560 Coro::State coro 3821 CODE:
3822 /* used by the manager thread */
3823 coro_state_destroy (aTHX_ coro);
3824
3825void
3826on_destroy (Coro::State coro, SV *cb)
3827 CODE:
3828 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3829
3830void
3831join (...)
3832 CODE:
3833 CORO_EXECUTE_SLF_XS (slf_init_join);
3834
3835void
3836terminate (...)
3837 CODE:
3838 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3839
3840void
3841cancel (...)
3842 CODE:
3843 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3844
3845int
3846safe_cancel (Coro::State self, ...)
3847 C_ARGS: aTHX_ self, &ST (1), items - 1
3848
3849void
3850schedule (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3853
3854void
3855schedule_to (...)
3856 CODE:
3857 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3858
3859void
3860cede_to (...)
3861 CODE:
3862 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3863
3864void
3865cede (...)
3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_cede);
3868
3869void
3870cede_notself (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3873
3874void
3875_set_current (SV *current)
3876 PROTOTYPE: $
3877 CODE:
3878 SvREFCNT_dec (SvRV (coro_current));
3879 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3880
3881void
3882_set_readyhook (SV *hook)
3883 PROTOTYPE: $
561 CODE: 3884 CODE:
562 3885 SvREFCNT_dec (coro_readyhook);
563 if (coro->mainstack) 3886 SvGETMAGIC (hook);
3887 if (SvOK (hook))
3888 {
3889 coro_readyhook = newSVsv (hook);
3890 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3891 }
3892 else
564 { 3893 {
565 struct coro temp; 3894 coro_readyhook = 0;
566 3895 CORO_READYHOOK = 0;
567 SAVE(aTHX_ (&temp), SAVE_ALL);
568 LOAD(aTHX_ coro);
569
570 destroy_stacks ();
571
572 LOAD((&temp)); /* this will get rid of defsv etc.. */
573 } 3896 }
574 3897
575 Safefree (coro); 3898int
3899prio (Coro::State coro, int newprio = 0)
3900 PROTOTYPE: $;$
3901 ALIAS:
3902 nice = 1
3903 CODE:
3904{
3905 RETVAL = coro->prio;
3906
3907 if (items > 1)
3908 {
3909 if (ix)
3910 newprio = coro->prio - newprio;
3911
3912 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3913 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3914
3915 coro->prio = newprio;
3916 }
3917}
3918 OUTPUT:
3919 RETVAL
3920
3921SV *
3922ready (SV *self)
3923 PROTOTYPE: $
3924 CODE:
3925 RETVAL = boolSV (api_ready (aTHX_ self));
3926 OUTPUT:
3927 RETVAL
3928
3929int
3930nready (...)
3931 PROTOTYPE:
3932 CODE:
3933 RETVAL = coro_nready;
3934 OUTPUT:
3935 RETVAL
576 3936
577void 3937void
578flush() 3938suspend (Coro::State self)
3939 PROTOTYPE: $
579 CODE: 3940 CODE:
580#ifdef MAY_FLUSH 3941 self->flags |= CF_SUSPENDED;
581 flush_padlist_cache ();
582#endif
583
584MODULE = Coro::State PACKAGE = Coro::Cont
585
586# this is dirty (do you hear me?) and should be in it's own .xs
587 3942
588void 3943void
589result(...) 3944resume (Coro::State self)
3945 PROTOTYPE: $
3946 CODE:
3947 self->flags &= ~CF_SUSPENDED;
3948
3949void
3950_pool_handler (...)
3951 CODE:
3952 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3953
3954void
3955async_pool (SV *cv, ...)
590 PROTOTYPE: @ 3956 PROTOTYPE: &@
3957 PPCODE:
3958{
3959 HV *hv = (HV *)av_pop (av_async_pool);
3960 AV *av = newAV ();
3961 SV *cb = ST (0);
3962 int i;
3963
3964 av_extend (av, items - 2);
3965 for (i = 1; i < items; ++i)
3966 av_push (av, SvREFCNT_inc_NN (ST (i)));
3967
3968 if ((SV *)hv == &PL_sv_undef)
3969 {
3970 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3971 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3972 SvREFCNT_dec (sv);
3973 }
3974
3975 {
3976 struct coro *coro = SvSTATE_hv (hv);
3977
3978 assert (!coro->invoke_cb);
3979 assert (!coro->invoke_av);
3980 coro->invoke_cb = SvREFCNT_inc (cb);
3981 coro->invoke_av = av;
3982 }
3983
3984 api_ready (aTHX_ (SV *)hv);
3985
3986 if (GIMME_V != G_VOID)
3987 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3988 else
3989 SvREFCNT_dec (hv);
3990}
3991
3992SV *
3993rouse_cb ()
3994 PROTOTYPE:
3995 CODE:
3996 RETVAL = coro_new_rouse_cb (aTHX);
3997 OUTPUT:
3998 RETVAL
3999
4000void
4001rouse_wait (...)
4002 PROTOTYPE: ;$
4003 PPCODE:
4004 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4005
4006void
4007on_enter (SV *block)
4008 ALIAS:
4009 on_leave = 1
4010 PROTOTYPE: &
4011 CODE:
4012{
4013 struct coro *coro = SvSTATE_current;
4014 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4015
4016 block = s_get_cv_croak (block);
4017
4018 if (!*avp)
4019 *avp = newAV ();
4020
4021 av_push (*avp, SvREFCNT_inc (block));
4022
4023 if (!ix)
4024 on_enterleave_call (aTHX_ block);
4025
4026 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4027 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4028 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4029}
4030
4031
4032MODULE = Coro::State PACKAGE = PerlIO::cede
4033
4034BOOT:
4035 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4036
4037
4038MODULE = Coro::State PACKAGE = Coro::Semaphore
4039
4040SV *
4041new (SV *klass, SV *count = 0)
4042 CODE:
4043{
4044 int semcnt = 1;
4045
4046 if (count)
4047 {
4048 SvGETMAGIC (count);
4049
4050 if (SvOK (count))
4051 semcnt = SvIV (count);
4052 }
4053
4054 RETVAL = sv_bless (
4055 coro_waitarray_new (aTHX_ semcnt),
4056 GvSTASH (CvGV (cv))
4057 );
4058}
4059 OUTPUT:
4060 RETVAL
4061
4062# helper for Coro::Channel and others
4063SV *
4064_alloc (int count)
4065 CODE:
4066 RETVAL = coro_waitarray_new (aTHX_ count);
4067 OUTPUT:
4068 RETVAL
4069
4070SV *
4071count (SV *self)
4072 CODE:
4073 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4074 OUTPUT:
4075 RETVAL
4076
4077void
4078up (SV *self, int adjust = 1)
4079 ALIAS:
4080 adjust = 1
591 CODE: 4081 CODE:
592 static SV *returnstk; 4082 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
593 SV *sv;
594 AV *defav = GvAV (PL_defgv);
595 struct coro *prev, *next;
596 4083
597 if (!returnstk) 4084void
598 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 4085down (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
599 4088
600 /* set up @_ -- ugly */ 4089void
601 av_clear (defav); 4090wait (...)
602 av_fill (defav, items - 1); 4091 CODE:
603 while (items--) 4092 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
604 av_store (defav, items, SvREFCNT_inc (ST(items)));
605 4093
606 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 4094void
607 sv = av_pop ((AV *)SvRV (returnstk)); 4095try (SV *self)
608 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 4096 PPCODE:
609 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 4097{
610 SvREFCNT_dec (sv); 4098 AV *av = (AV *)SvRV (self);
611 transfer(prev, next, 0); 4099 SV *count_sv = AvARRAY (av)[0];
4100 IV count = SvIVX (count_sv);
612 4101
4102 if (count > 0)
4103 {
4104 --count;
4105 SvIVX (count_sv) = count;
4106 XSRETURN_YES;
4107 }
4108 else
4109 XSRETURN_NO;
4110}
4111
4112void
4113waiters (SV *self)
4114 PPCODE:
4115{
4116 AV *av = (AV *)SvRV (self);
4117 int wcount = AvFILLp (av) + 1 - 1;
4118
4119 if (GIMME_V == G_SCALAR)
4120 XPUSHs (sv_2mortal (newSViv (wcount)));
4121 else
4122 {
4123 int i;
4124 EXTEND (SP, wcount);
4125 for (i = 1; i <= wcount; ++i)
4126 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4127 }
4128}
4129
4130MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4131
4132void
4133_may_delete (SV *sem, int count, unsigned int extra_refs)
4134 PPCODE:
4135{
4136 AV *av = (AV *)SvRV (sem);
4137
4138 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4139 && AvFILLp (av) == 0 /* no waiters, just count */
4140 && SvIV (AvARRAY (av)[0]) == count)
4141 XSRETURN_YES;
4142
4143 XSRETURN_NO;
4144}
4145
4146MODULE = Coro::State PACKAGE = Coro::Signal
4147
4148SV *
4149new (SV *klass)
4150 CODE:
4151 RETVAL = sv_bless (
4152 coro_waitarray_new (aTHX_ 0),
4153 GvSTASH (CvGV (cv))
4154 );
4155 OUTPUT:
4156 RETVAL
4157
4158void
4159wait (...)
4160 CODE:
4161 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4162
4163void
4164broadcast (SV *self)
4165 CODE:
4166{
4167 AV *av = (AV *)SvRV (self);
4168 coro_signal_wake (aTHX_ av, AvFILLp (av));
4169}
4170
4171void
4172send (SV *self)
4173 CODE:
4174{
4175 AV *av = (AV *)SvRV (self);
4176
4177 if (AvFILLp (av))
4178 coro_signal_wake (aTHX_ av, 1);
4179 else
4180 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4181}
4182
4183IV
4184awaited (SV *self)
4185 CODE:
4186 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4187 OUTPUT:
4188 RETVAL
4189
4190
4191MODULE = Coro::State PACKAGE = Coro::AnyEvent
4192
4193BOOT:
4194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4195
4196void
4197_schedule (...)
4198 CODE:
4199{
4200 static int incede;
4201
4202 api_cede_notself (aTHX);
4203
4204 ++incede;
4205 while (coro_nready >= incede && api_cede (aTHX))
4206 ;
4207
4208 sv_setsv (sv_activity, &PL_sv_undef);
4209 if (coro_nready >= incede)
4210 {
4211 PUSHMARK (SP);
4212 PUTBACK;
4213 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4214 }
4215
4216 --incede;
4217}
4218
4219
4220MODULE = Coro::State PACKAGE = Coro::AIO
4221
4222void
4223_register (char *target, char *proto, SV *req)
4224 CODE:
4225{
4226 SV *req_cv = s_get_cv_croak (req);
4227 /* newXSproto doesn't return the CV on 5.8 */
4228 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4229 sv_setpv ((SV *)slf_cv, proto);
4230 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4231}
4232
4233MODULE = Coro::State PACKAGE = Coro::Select
4234
4235void
4236patch_pp_sselect ()
4237 CODE:
4238 if (!coro_old_pp_sselect)
4239 {
4240 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4241 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4242 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4243 }
4244
4245void
4246unpatch_pp_sselect ()
4247 CODE:
4248 if (coro_old_pp_sselect)
4249 {
4250 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4251 coro_old_pp_sselect = 0;
4252 }
4253
4254MODULE = Coro::State PACKAGE = Coro::Util
4255
4256void
4257_exit (int code)
4258 CODE:
4259 _exit (code);
4260
4261NV
4262time ()
4263 CODE:
4264 RETVAL = nvtime (aTHX);
4265 OUTPUT:
4266 RETVAL
4267
4268NV
4269gettimeofday ()
4270 PPCODE:
4271{
4272 UV tv [2];
4273 u2time (aTHX_ tv);
4274 EXTEND (SP, 2);
4275 PUSHs (sv_2mortal (newSVuv (tv [0])));
4276 PUSHs (sv_2mortal (newSVuv (tv [1])));
4277}
4278

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