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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.466 by root, Sat Jun 25 19:22:33 2016 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
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11// threaded perls might need much more, 65536 or more, 18#define ECB_NO_THREADS 1
12// which is 0.5 to 1MB 19#define ECB_NO_LIBM 1
13#define STACKSIZE 16384 20#include "ecb.h"
14 21
15#if PERL_VERSION < 6 22#include <stddef.h>
16# ifndef PL_ppaddr 23#include <stdio.h>
17# define PL_ppaddr ppaddr 24#include <errno.h>
25#include <assert.h>
26
27#ifndef SvREFCNT_dec_NN
28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
18# endif 47# endif
19# ifndef call_sv 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
20# define call_sv perl_call_sv 49# define PadlistMAX(pl) AvFILLp (pl)
50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
51# define PadARRAY AvARRAY
52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
74#else
75# include <inttypes.h> /* most portable stdint.h */
76#endif
77
78/* the maximum number of idle cctx that will be pooled */
79static int cctx_max_idle = 4;
80
81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
82# define HAS_SCOPESTACK_NAME 1
83#endif
84
85/* prefer perl internal functions over our own? */
86#ifndef CORO_PREFER_PERL_FUNCTIONS
87# define CORO_PREFER_PERL_FUNCTIONS 0
88#endif
89
90/* The next macros try to return the current stack pointer, in an as
91 * portable way as possible. */
92#if __GNUC__ >= 4
93# define dSTACKLEVEL int stacklevel_dummy
94# define STACKLEVEL __builtin_frame_address (0)
95#else
96# define dSTACKLEVEL volatile void *stacklevel
97# define STACKLEVEL ((void *)&stacklevel)
98#endif
99
100#define IN_DESTRUCT PL_dirty
101
102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
21# endif 108# endif
22# ifndef get_sv 109#endif
23# define get_sv perl_get_sv 110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
24# endif 118# endif
25# ifndef get_cv
26# define get_cv perl_get_cv
27# endif 119#endif
28# ifndef IS_PADGV 120
29# define IS_PADGV(v) 0 121/* perl usually suppressed asserts. for debugging, we sometimes force it to be on */
122#if 0
123# undef NDEBUG
124# include <assert.h>
30# endif 125#endif
31# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0
33# endif
34#endif
35 126
36#include <signal.h> 127static double (*nvtime)(); /* so why doesn't it take void? */
128static void (*u2time)(pTHX_ UV ret[2]);
37 129
38#ifdef HAVE_MMAP 130/* we hijack an hopefully unused CV flag for our purposes */
39# include <unistd.h> 131#define CVf_SLF 0x4000
40# include <sys/mman.h> 132static OP *pp_slf (pTHX);
41# ifndef MAP_ANONYMOUS 133static void slf_destroy (pTHX_ struct coro *coro);
42# ifdef MAP_ANON
43# define MAP_ANONYMOUS MAP_ANON
44# else
45# undef HAVE_MMAP
46# endif
47# endif
48#endif
49 134
50#define SUB_INIT "Coro::State::initialize" 135static U32 cctx_gen;
51#define UCORO_STATE "_coro_state" 136static size_t cctx_stacksize = CORO_STACKSIZE;
52
53/* The next macro should declare a variable stacklevel that contains and approximation
54 * to the current C stack pointer. Its property is that it changes with each call
55 * and should be unique. */
56#define dSTACKLEVEL void *stacklevel = &stacklevel
57
58#define IN_DESTRUCT (PL_main_cv == Nullcv)
59
60#define labs(l) ((l) >= 0 ? (l) : -(l))
61
62#include "CoroAPI.h"
63
64#ifdef USE_ITHREADS
65static perl_mutex coro_mutex;
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68#else
69# define LOCK 0
70# define UNLOCK 0
71#endif
72
73static struct CoroAPI coroapi; 137static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */ 138static AV *main_mainstack; /* used to differentiate between $main and others */
139static JMPENV *main_top_env;
75static HV *coro_state_stash; 140static HV *coro_state_stash, *coro_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */ 141static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
79 142
80/* this is actually not only the c stack but also c registers etc... */ 143static AV *av_destroy; /* destruction queue */
144static SV *sv_manager; /* the manager coro */
145static SV *sv_idle; /* $Coro::idle */
146
147static GV *irsgv; /* $/ */
148static GV *stdoutgv; /* *STDOUT */
149static SV *rv_diehook;
150static SV *rv_warnhook;
151
152/* async_pool helper stuff */
153static SV *sv_pool_rss;
154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
159
160/* Coro::AnyEvent */
161static SV *sv_activity;
162
163/* enable processtime/realtime profiling */
164static char enable_times;
165typedef U32 coro_ts[2];
166static coro_ts time_real, time_cpu;
167static char times_valid;
168
169static struct coro_cctx *cctx_first;
170static int cctx_count, cctx_idle;
171
172enum
173{
174 CC_MAPPED = 0x01,
175 CC_NOREUSE = 0x02, /* throw this away after tracing */
176 CC_TRACE = 0x04,
177 CC_TRACE_SUB = 0x08, /* trace sub calls */
178 CC_TRACE_LINE = 0x10, /* trace each statement */
179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
180};
181
182/* this is a structure representing a c-level coroutine */
81typedef struct { 183typedef struct coro_cctx
82 int refcnt; /* pointer reference counter */ 184{
83 int usecnt; /* shared by how many coroutines */ 185 struct coro_cctx *next;
84 int gencnt; /* generation counter */
85 186
187 /* the stack */
188 struct coro_stack stack;
189
190 /* cpu state */
191 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
192#ifndef NDEBUG
193 JMPENV *idle_te; /* same as idle_sp, but for top_env */
194#endif
195 JMPENV *top_env;
86 coro_context cctx; 196 coro_context cctx;
87 197
88 void *sptr; 198 U32 gen;
89 long ssize; /* positive == mmap, otherwise malloc */ 199#if CORO_USE_VALGRIND
90} coro_stack; 200 int valgrind_id;
201#endif
202 unsigned char flags;
203} coro_cctx;
91 204
205static coro_cctx *cctx_current; /* the currently running cctx */
206
207/*****************************************************************************/
208
209static MGVTBL coro_state_vtbl;
210
211enum
212{
213 CF_RUNNING = 0x0001, /* coroutine is running */
214 CF_READY = 0x0002, /* coroutine is ready */
215 CF_NEW = 0x0004, /* has never been switched to */
216 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
217 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
218 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct
223{
224 #define VARx(name,expr,type) type name;
225 #include "state.h"
226} perl_slots;
227
228/* how many context stack entries do we need for perl_slots */
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
230
231/* this is a structure representing a perl-level coroutine */
92struct coro { 232struct coro
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233{
94 JMPENV start_env; 234 /* the C coroutine allocated to this perl coroutine, if any */
235 coro_cctx *cctx;
95 236
96 /* the optional C context */ 237 /* ready queue */
97 coro_stack *stack; 238 struct coro *next_ready;
98 void *cursp;
99 int gencnt;
100 239
101 /* optionally saved, might be zero */ 240 /* state data */
102 AV *defav; 241 struct CoroSLF slf_frame; /* saved slf frame */
103 SV *defsv;
104 SV *errsv;
105
106 /* saved global state not related to stacks */
107 U8 dowarn;
108 I32 in_eval;
109
110 /* the stacks and related info (callchain etc..) */
111 PERL_SI *curstackinfo;
112 AV *curstack;
113 AV *mainstack; 242 AV *mainstack;
114 SV **stack_sp; 243 perl_slots *slot; /* basically the saved sp */
115 OP *op;
116 SV **curpad;
117 AV *comppad;
118 CV *compcv;
119 SV **stack_base;
120 SV **stack_max;
121 SV **tmps_stack;
122 I32 tmps_floor;
123 I32 tmps_ix;
124 I32 tmps_max;
125 I32 *markstack;
126 I32 *markstack_ptr;
127 I32 *markstack_max;
128 I32 *scopestack;
129 I32 scopestack_ix;
130 I32 scopestack_max;
131 ANY *savestack;
132 I32 savestack_ix;
133 I32 savestack_max;
134 OP **retstack;
135 I32 retstack_ix;
136 I32 retstack_max;
137 PMOP *curpm;
138 COP *curcop;
139 JMPENV *top_env;
140 244
245 CV *startcv; /* the CV to execute */
141 /* data associated with this coroutine (initial args) */ 246 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 247 int flags; /* CF_ flags */
248 HV *hv; /* the perl hash associated with this coro, if any */
249
250 /* statistics */
251 int usecount; /* number of transfers to this coro */
252
253 /* coro process data */
254 int prio;
255 SV *except; /* exception to be thrown */
256 SV *rouse_cb; /* last rouse callback */
257 AV *on_destroy; /* callbacks or coros to notify on destroy */
258 AV *status; /* the exit status list */
259
260 /* async_pool */
261 SV *saved_deffh;
262 SV *invoke_cb;
263 AV *invoke_av;
264
265 /* on_enter/on_leave */
266 AV *on_enter; AV *on_enter_xs;
267 AV *on_leave; AV *on_leave_xs;
268
269 /* swap_sv */
270 AV *swap_sv;
271
272 /* times */
273 coro_ts t_cpu, t_real;
274
275 /* linked list */
276 struct coro *next, *prev;
143}; 277};
144 278
145typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
146typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
147 281
148/* mostly copied from op.c:cv_clone2 */ 282/* the following variables are effectively part of the perl context */
149STATIC AV * 283/* and get copied between struct coro and these variables */
150clone_padlist (pTHX_ AV *protopadlist) 284/* the main reason we don't support windows process emulation */
285static struct CoroSLF slf_frame; /* the current slf frame */
286
287/** Coro ********************************************************************/
288
289#define CORO_PRIO_MAX 3
290#define CORO_PRIO_HIGH 1
291#define CORO_PRIO_NORMAL 0
292#define CORO_PRIO_LOW -1
293#define CORO_PRIO_IDLE -3
294#define CORO_PRIO_MIN -4
295
296/* for Coro.pm */
297static SV *coro_current;
298static SV *coro_readyhook;
299static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
300static CV *cv_coro_run;
301static struct coro *coro_first;
302#define coro_nready coroapi.nready
303
304/** JIT *********************************************************************/
305
306#if CORO_JIT
307 /* APPLE doesn't have mmap though */
308 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
309 #ifndef CORO_JIT_TYPE
310 #if ECB_AMD64 && CORO_JIT_UNIXY
311 #define CORO_JIT_TYPE "amd64-unix"
312 #elif __i386 && CORO_JIT_UNIXY
313 #define CORO_JIT_TYPE "x86-unix"
314 #endif
315 #endif
316#endif
317
318#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
319 #undef CORO_JIT
320#endif
321
322#if CORO_JIT
323 typedef void (*load_save_perl_slots_type)(perl_slots *);
324 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
325#endif
326
327/** Coro::Select ************************************************************/
328
329static OP *(*coro_old_pp_sselect) (pTHX);
330static SV *coro_select_select;
331
332/* horrible hack, but if it works... */
333static OP *
334coro_pp_sselect (pTHX)
151{ 335{
152 AV *av; 336 dSP;
153 I32 ix; 337 PUSHMARK (SP - 4); /* fake argument list */
154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 338 XPUSHs (coro_select_select);
155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 339 PUTBACK;
156 SV **pname = AvARRAY (protopad_name); 340
157 SV **ppad = AvARRAY (protopad); 341 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
158 I32 fname = AvFILLp (protopad_name); 342 PL_op->op_flags |= OPf_STACKED;
159 I32 fpad = AvFILLp (protopad); 343 PL_op->op_private = 0;
160 AV *newpadlist, *newpad_name, *newpad; 344 return PL_ppaddr [OP_ENTERSUB](aTHX);
345}
346
347/** time stuff **************************************************************/
348
349#ifdef HAS_GETTIMEOFDAY
350
351ecb_inline void
352coro_u2time (pTHX_ UV ret[2])
353{
354 struct timeval tv;
355 gettimeofday (&tv, 0);
356
357 ret [0] = tv.tv_sec;
358 ret [1] = tv.tv_usec;
359}
360
361ecb_inline double
362coro_nvtime (void)
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 return tv.tv_sec + tv.tv_usec * 1e-6;
368}
369
370ecb_inline void
371time_init (pTHX)
372{
373 nvtime = coro_nvtime;
374 u2time = coro_u2time;
375}
376
377#else
378
379ecb_inline void
380time_init (pTHX)
381{
161 SV **npad; 382 SV **svp;
162 383
163 newpad_name = newAV (); 384 require_pv ("Time/HiRes.pm");
164 for (ix = fname; ix >= 0; ix--)
165 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166 385
167 newpad = newAV (); 386 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
168 av_fill (newpad, AvFILLp (protopad));
169 npad = AvARRAY (newpad);
170 387
171 newpadlist = newAV (); 388 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
389 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
390
391 nvtime = INT2PTR (double (*)(), SvIV (*svp));
392
393 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
394 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
395}
396
397#endif
398
399/** lowlevel stuff **********************************************************/
400
401static SV * ecb_noinline
402coro_get_sv (pTHX_ const char *name, int create)
403{
404#if PERL_VERSION_ATLEAST (5,10,0)
405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
406 get_sv (name, create);
407#endif
408 return get_sv (name, create);
409}
410
411static AV * ecb_noinline
412coro_get_av (pTHX_ const char *name, int create)
413{
414#if PERL_VERSION_ATLEAST (5,10,0)
415 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
416 get_av (name, create);
417#endif
418 return get_av (name, create);
419}
420
421static HV * ecb_noinline
422coro_get_hv (pTHX_ const char *name, int create)
423{
424#if PERL_VERSION_ATLEAST (5,10,0)
425 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
426 get_hv (name, create);
427#endif
428 return get_hv (name, create);
429}
430
431ecb_inline void
432coro_times_update (void)
433{
434#ifdef coro_clock_gettime
435 struct timespec ts;
436
437 ts.tv_sec = ts.tv_nsec = 0;
438 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
439 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
440
441 ts.tv_sec = ts.tv_nsec = 0;
442 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
443 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
444#else
445 dTHX;
446 UV tv[2];
447
448 u2time (aTHX_ tv);
449 time_real [0] = tv [0];
450 time_real [1] = tv [1] * 1000;
451#endif
452}
453
454ecb_inline void
455coro_times_add (struct coro *c)
456{
457 c->t_real [1] += time_real [1];
458 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
459 c->t_real [0] += time_real [0];
460
461 c->t_cpu [1] += time_cpu [1];
462 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
463 c->t_cpu [0] += time_cpu [0];
464}
465
466ecb_inline void
467coro_times_sub (struct coro *c)
468{
469 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
470 c->t_real [1] -= time_real [1];
471 c->t_real [0] -= time_real [0];
472
473 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
474 c->t_cpu [1] -= time_cpu [1];
475 c->t_cpu [0] -= time_cpu [0];
476}
477
478/*****************************************************************************/
479/* magic glue */
480
481#define CORO_MAGIC_type_cv 26
482#define CORO_MAGIC_type_state PERL_MAGIC_ext
483
484#define CORO_MAGIC_NN(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
486 ? SvMAGIC (sv) \
487 : mg_find (sv, type))
488
489#define CORO_MAGIC(sv, type) \
490 (ecb_expect_true (SvMAGIC (sv)) \
491 ? CORO_MAGIC_NN (sv, type) \
492 : 0)
493
494#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
495#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
496
497ecb_inline MAGIC *
498SvSTATEhv_p (pTHX_ SV *coro)
499{
500 MAGIC *mg;
501
502 if (ecb_expect_true (
503 SvTYPE (coro) == SVt_PVHV
504 && (mg = CORO_MAGIC_state (coro))
505 && mg->mg_virtual == &coro_state_vtbl
506 ))
507 return mg;
508
509 return 0;
510}
511
512ecb_inline struct coro *
513SvSTATE_ (pTHX_ SV *coro_sv)
514{
515 MAGIC *mg;
516
517 if (SvROK (coro_sv))
518 coro_sv = SvRV (coro_sv);
519
520 mg = SvSTATEhv_p (aTHX_ coro_sv);
521 if (!mg)
522 croak ("Coro::State object required");
523
524 return (struct coro *)mg->mg_ptr;
525}
526
527#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
528
529/* faster than SvSTATE, but expects a coroutine hv */
530#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
531#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
532
533/*****************************************************************************/
534/* padlist management and caching */
535
536ecb_inline PADLIST *
537coro_derive_padlist (pTHX_ CV *cv)
538{
539 PADLIST *padlist = CvPADLIST (cv);
540 PADLIST *newpadlist;
541 PADNAMELIST *padnames;
542 PAD *newpad;
543 PADOFFSET off = PadlistMAX (padlist) + 1;
544
545#if NEWPADAPI
546
547 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
548 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
549 while (!PadlistARRAY (padlist)[off - 1])
550 --off;
551
552 Perl_pad_push (aTHX_ padlist, off);
553
554 newpad = PadlistARRAY (padlist)[off];
555 PadlistARRAY (padlist)[off] = 0;
556
557#else
558
559#if PERL_VERSION_ATLEAST (5,10,0)
560 Perl_pad_push (aTHX_ padlist, off);
561#else
562 Perl_pad_push (aTHX_ padlist, off, 1);
563#endif
564
565 newpad = PadlistARRAY (padlist)[off];
566 PadlistMAX (padlist) = off - 1;
567
568#endif
569
570 newPADLIST (newpadlist);
571#if !PERL_VERSION_ATLEAST(5,15,3)
572 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
172 AvREAL_off (newpadlist); 573 AvREAL_off (newpadlist);
173 av_store (newpadlist, 0, (SV *) newpad_name); 574#endif
174 av_store (newpadlist, 1, (SV *) newpad);
175 575
176 av = newAV (); /* will be @_ */ 576 /* Already extended to 2 elements by newPADLIST. */
177 av_extend (av, 0); 577 PadlistMAX (newpadlist) = 1;
178 av_store (newpad, 0, (SV *) av);
179 AvFLAGS (av) = AVf_REIFY;
180 578
181 for (ix = fpad; ix > 0; ix--) 579 padnames = PadlistNAMES (padlist);
182 { 580 ++PadnamelistREFCNT (padnames);
183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 581 PadlistNAMES (newpadlist) = padnames;
184 582
185 if (namesv && namesv != &PL_sv_undef) 583 PadlistARRAY (newpadlist)[1] = newpad;
584
585 return newpadlist;
586}
587
588ecb_inline void
589free_padlist (pTHX_ PADLIST *padlist)
590{
591 /* may be during global destruction */
592 if (!IN_DESTRUCT)
593 {
594 I32 i = PadlistMAX (padlist);
595
596 while (i > 0) /* special-case index 0 */
186 { 597 {
187 char *name = SvPVX (namesv); /* XXX */ 598 /* we try to be extra-careful here */
599 PAD *pad = PadlistARRAY (padlist)[i--];
188 600
189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 601 if (pad)
190 { /* lexical from outside? */
191 npad[ix] = SvREFCNT_inc (ppad[ix]);
192 } 602 {
193 else 603 I32 j = PadMAX (pad);
194 { /* our own lexical */ 604
195 SV *sv; 605 while (j >= 0)
196 if (*name == '&') 606 SvREFCNT_dec (PadARRAY (pad)[j--]);
607
608 PadMAX (pad) = -1;
197 sv = SvREFCNT_inc (ppad[ix]); 609 SvREFCNT_dec (pad);
198 else if (*name == '@')
199 sv = (SV *) newAV ();
200 else if (*name == '%')
201 sv = (SV *) newHV ();
202 else
203 sv = NEWSV (0, 0);
204
205#ifdef SvPADBUSY
206 if (!SvPADBUSY (sv))
207#endif
208 SvPADMY_on (sv);
209
210 npad[ix] = sv;
211 } 610 }
212 } 611 }
213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214 {
215 npad[ix] = SvREFCNT_inc (ppad[ix]);
216 }
217 else
218 {
219 SV *sv = NEWSV (0, 0);
220 SvPADTMP_on (sv);
221 npad[ix] = sv;
222 }
223 }
224 612
225#if 0 /* return -ENOTUNDERSTOOD */ 613 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
226 /* Now that vars are all in place, clone nested closures. */
227 614
228 for (ix = fpad; ix > 0; ix--) { 615#if NEWPADAPI
229 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 616 Safefree (PadlistARRAY (padlist));
230 if (namesv 617 Safefree (padlist);
231 && namesv != &PL_sv_undef 618#else
232 && !(SvFLAGS(namesv) & SVf_FAKE)
233 && *SvPVX(namesv) == '&'
234 && CvCLONE(ppad[ix]))
235 {
236 CV *kid = cv_clone((CV*)ppad[ix]);
237 SvREFCNT_dec(ppad[ix]);
238 CvCLONE_on(kid);
239 SvPADMY_on(kid);
240 npad[ix] = (SV*)kid;
241 }
242 }
243#endif
244
245 return newpadlist;
246}
247
248STATIC void
249free_padlist (pTHX_ AV *padlist)
250{
251 /* may be during global destruction */
252 if (SvREFCNT (padlist))
253 {
254 I32 i = AvFILLp (padlist); 619 AvFILLp (padlist) = -1;
255 while (i >= 0) 620 AvREAL_off (padlist);
256 {
257 SV **svp = av_fetch (padlist, i--, FALSE);
258 if (svp)
259 {
260 SV *sv;
261 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
262 SvREFCNT_dec (sv);
263
264 SvREFCNT_dec (*svp);
265 }
266 }
267
268 SvREFCNT_dec ((SV*)padlist); 621 SvREFCNT_dec ((SV*)padlist);
622#endif
269 } 623 }
270} 624}
271 625
272STATIC int 626static int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 627coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{ 628{
275 AV *padlist; 629 PADLIST *padlist;
276 AV *av = (AV *)mg->mg_obj; 630 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
631 size_t len = *(size_t *)mg->mg_ptr;
277 632
278 /* casting is fun. */ 633 /* perl manages to free our internal AV and _then_ call us */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 634 if (IN_DESTRUCT)
635 return 0;
636
637 while (len--)
280 free_padlist (aTHX_ padlist); 638 free_padlist (aTHX_ padlists[len]);
281 639
282 SvREFCNT_dec (av); 640 return 0;
283} 641}
284 642
285#define PERL_MAGIC_coro PERL_MAGIC_ext 643static MGVTBL coro_cv_vtbl = {
286 644 0, 0, 0, 0,
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 645 coro_cv_free
646};
288 647
289/* the next two functions merely cache the padlists */ 648/* the next two functions merely cache the padlists */
290STATIC void 649ecb_inline void
291get_padlist (pTHX_ CV *cv) 650get_padlist (pTHX_ CV *cv)
292{ 651{
293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 652 MAGIC *mg = CORO_MAGIC_cv (cv);
653 size_t *lenp;
294 654
295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 655 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 656 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
297 else 657 else
658 {
659#if CORO_PREFER_PERL_FUNCTIONS
660 /* this is probably cleaner? but also slower! */
661 /* in practise, it seems to be less stable */
662 CV *cp = Perl_cv_clone (aTHX_ cv);
663 CvPADLIST (cv) = CvPADLIST (cp);
664 CvPADLIST (cp) = 0;
665 SvREFCNT_dec (cp);
666#else
298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 667 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
668#endif
669 }
299} 670}
300 671
301STATIC void 672ecb_inline void
302put_padlist (pTHX_ CV *cv) 673put_padlist (pTHX_ CV *cv)
303{ 674{
304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 675 MAGIC *mg = CORO_MAGIC_cv (cv);
305 676
306 if (!mg) 677 if (ecb_expect_false (!mg))
307 {
308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310 mg->mg_virtual = &vtbl_coro;
311 mg->mg_obj = (SV *)newAV ();
312 } 678 {
679 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
680 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
681 mg->mg_len = 1; /* so mg_free frees mg_ptr */
682 }
683 else
684 Renew (mg->mg_ptr,
685 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
686 char);
313 687
314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 688 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
315} 689}
316 690
317#define SB do { 691/** load & save, init *******************************************************/
318#define SE } while (0)
319 692
320#define LOAD(state) load_state(aTHX_ (state)); 693ecb_inline void
321#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 694swap_sv (SV *a, SV *b)
695{
696 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
697 SV tmp;
322 698
323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 699 /* swap sv_any */
700 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
324 701
702 /* swap sv_flags */
703 SvFLAGS (&tmp) = SvFLAGS (a);
704 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
705 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
706
707#if PERL_VERSION_ATLEAST (5,10,0)
708 /* perl 5.10 and later complicates this _quite_ a bit, but it also
709 * is much faster, so no quarrels here. alternatively, we could
710 * sv_upgrade to avoid this.
711 */
712 {
713 /* swap sv_u */
714 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
715
716 /* if SvANY points to the head, we need to adjust the pointers,
717 * as the pointer for a still points to b, and maybe vice versa.
718 */
719 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
720 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
721 svany_in_head_set |= 1 << SVt_NV;
722 #endif
723
724 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
725
726 if (svany_in_head (SvTYPE (a)))
727 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
728
729 if (svany_in_head (SvTYPE (b)))
730 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
731 }
732#endif
733}
734
735/* swap sv heads, at least logically */
325static void 736static void
737swap_svs_enter (pTHX_ Coro__State c)
738{
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
742 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
743}
744
745static void
746swap_svs_leave (pTHX_ Coro__State c)
747{
748 int i;
749
750 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
751 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
752}
753
754#define SWAP_SVS_ENTER(coro) \
755 if (ecb_expect_false ((coro)->swap_sv)) \
756 swap_svs_enter (aTHX_ (coro))
757
758#define SWAP_SVS_LEAVE(coro) \
759 if (ecb_expect_false ((coro)->swap_sv)) \
760 swap_svs_leave (aTHX_ (coro))
761
762static void
763on_enterleave_call (pTHX_ SV *cb);
764
765static void
326load_state(pTHX_ Coro__State c) 766load_perl (pTHX_ Coro__State c)
327{ 767{
328 PL_dowarn = c->dowarn; 768 perl_slots *slot = c->slot;
329 PL_in_eval = c->in_eval; 769 c->slot = 0;
330 770
331 PL_curstackinfo = c->curstackinfo;
332 PL_curstack = c->curstack;
333 PL_mainstack = c->mainstack; 771 PL_mainstack = c->mainstack;
334 PL_stack_sp = c->stack_sp;
335 PL_op = c->op;
336 PL_curpad = c->curpad;
337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
339 PL_stack_base = c->stack_base;
340 PL_stack_max = c->stack_max;
341 PL_tmps_stack = c->tmps_stack;
342 PL_tmps_floor = c->tmps_floor;
343 PL_tmps_ix = c->tmps_ix;
344 PL_tmps_max = c->tmps_max;
345 PL_markstack = c->markstack;
346 PL_markstack_ptr = c->markstack_ptr;
347 PL_markstack_max = c->markstack_max;
348 PL_scopestack = c->scopestack;
349 PL_scopestack_ix = c->scopestack_ix;
350 PL_scopestack_max = c->scopestack_max;
351 PL_savestack = c->savestack;
352 PL_savestack_ix = c->savestack_ix;
353 PL_savestack_max = c->savestack_max;
354 PL_retstack = c->retstack;
355 PL_retstack_ix = c->retstack_ix;
356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 772
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 773#if CORO_JIT
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 774 load_perl_slots (slot);
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 775#else
776 #define VARx(name,expr,type) expr = slot->name;
777 #include "state.h"
778#endif
364 779
365 { 780 {
366 dSP; 781 dSP;
782
367 CV *cv; 783 CV *cv;
368 784
369 /* now do the ugly restore mess */ 785 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 786 while (ecb_expect_true (cv = (CV *)POPs))
371 { 787 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 788 put_padlist (aTHX_ cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 789 CvDEPTH (cv) = PTR2IV (POPs);
378 } 790 CvPADLIST (cv) = (PADLIST *)POPs;
379
380 ++CvDEPTH(cv);
381 } 791 }
382 792
383 PUTBACK; 793 PUTBACK;
384 } 794 }
385}
386 795
796 slf_frame = c->slf_frame;
797 CORO_THROW = c->except;
798
799 if (ecb_expect_false (enable_times))
800 {
801 if (ecb_expect_false (!times_valid))
802 coro_times_update ();
803
804 coro_times_sub (c);
805 }
806
807 if (ecb_expect_false (c->on_enter))
808 {
809 int i;
810
811 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
812 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
813 }
814
815 if (ecb_expect_false (c->on_enter_xs))
816 {
817 int i;
818
819 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
820 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
821 }
822
823 SWAP_SVS_ENTER (c);
824}
825
387static void 826static void
388save_state(pTHX_ Coro__State c, int flags) 827save_perl (pTHX_ Coro__State c)
389{ 828{
829 SWAP_SVS_LEAVE (c);
830
831 if (ecb_expect_false (c->on_leave_xs))
832 {
833 int i;
834
835 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
836 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
837 }
838
839 if (ecb_expect_false (c->on_leave))
840 {
841 int i;
842
843 for (i = AvFILLp (c->on_leave); i >= 0; --i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
845 }
846
847 times_valid = 0;
848
849 if (ecb_expect_false (enable_times))
850 {
851 coro_times_update (); times_valid = 1;
852 coro_times_add (c);
853 }
854
855 c->except = CORO_THROW;
856 c->slf_frame = slf_frame;
857
390 { 858 {
391 dSP; 859 dSP;
392 I32 cxix = cxstack_ix; 860 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 861 PERL_CONTEXT *ccstk = cxstack;
394 PERL_SI *top_si = PL_curstackinfo; 862 PERL_SI *top_si = PL_curstackinfo;
… …
396 /* 864 /*
397 * the worst thing you can imagine happens first - we have to save 865 * the worst thing you can imagine happens first - we have to save
398 * (and reinitialize) all cv's in the whole callchain :( 866 * (and reinitialize) all cv's in the whole callchain :(
399 */ 867 */
400 868
401 PUSHs (Nullsv); 869 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 870 /* this loop was inspired by pp_caller */
403 for (;;) 871 for (;;)
404 { 872 {
405 while (cxix >= 0) 873 while (ecb_expect_true (cxix >= 0))
406 { 874 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 875 PERL_CONTEXT *cx = &ccstk[cxix--];
408 876
409 if (CxTYPE(cx) == CXt_SUB) 877 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
410 { 878 {
411 CV *cv = cx->blk_sub.cv; 879 CV *cv = cx->blk_sub.cv;
880
412 if (CvDEPTH(cv)) 881 if (ecb_expect_true (CvDEPTH (cv)))
413 { 882 {
414 EXTEND (SP, CvDEPTH(cv)*2); 883 EXTEND (SP, 3);
415
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 884 PUSHs ((SV *)CvPADLIST (cv));
885 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 886 PUSHs ((SV *)cv);
425 887
888 CvDEPTH (cv) = 0;
426 get_padlist (aTHX_ cv); /* this is a monster */ 889 get_padlist (aTHX_ cv);
427 } 890 }
428 } 891 }
429#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT)
431 {
432 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 }
436#endif
437 } 892 }
438 893
439 if (top_si->si_type == PERLSI_MAIN) 894 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
440 break; 895 break;
441 896
442 top_si = top_si->si_prev; 897 top_si = top_si->si_prev;
443 ccstk = top_si->si_cxstack; 898 ccstk = top_si->si_cxstack;
444 cxix = top_si->si_cxix; 899 cxix = top_si->si_cxix;
445 } 900 }
446 901
447 PUTBACK; 902 PUTBACK;
448 } 903 }
449 904
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 905 /* allocate some space on the context stack for our purposes */
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 906 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 907 {
908 unsigned int i;
453 909
454 c->dowarn = PL_dowarn; 910 for (i = 0; i < SLOT_COUNT; ++i)
455 c->in_eval = PL_in_eval; 911 CXINC;
456 912
457 c->curstackinfo = PL_curstackinfo; 913 cxstack_ix -= SLOT_COUNT; /* undo allocation */
458 c->curstack = PL_curstack; 914 }
915
459 c->mainstack = PL_mainstack; 916 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp; 917
461 c->op = PL_op; 918 {
462 c->curpad = PL_curpad; 919 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
463 c->comppad = PL_comppad; 920
464 c->compcv = PL_compcv; 921#if CORO_JIT
465 c->stack_base = PL_stack_base; 922 save_perl_slots (slot);
466 c->stack_max = PL_stack_max; 923#else
467 c->tmps_stack = PL_tmps_stack; 924 #define VARx(name,expr,type) slot->name = expr;
468 c->tmps_floor = PL_tmps_floor; 925 #include "state.h"
469 c->tmps_ix = PL_tmps_ix; 926#endif
470 c->tmps_max = PL_tmps_max; 927 }
471 c->markstack = PL_markstack;
472 c->markstack_ptr = PL_markstack_ptr;
473 c->markstack_max = PL_markstack_max;
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
484 c->curcop = PL_curcop;
485 c->top_env = PL_top_env;
486} 928}
487 929
488/* 930/*
489 * allocate various perl stacks. This is an exact copy 931 * allocate various perl stacks. This is almost an exact copy
490 * of perl.c:init_stacks, except that it uses less memory 932 * of perl.c:init_stacks, except that it uses less memory
491 * on the (sometimes correct) assumption that coroutines do 933 * on the (sometimes correct) assumption that coroutines do
492 * not usually need a lot of stackspace. 934 * not usually need a lot of stackspace.
493 */ 935 */
494STATIC void 936#if CORO_PREFER_PERL_FUNCTIONS
937# define coro_init_stacks(thx) init_stacks ()
938#else
939static void
495coro_init_stacks (pTHX) 940coro_init_stacks (pTHX)
496{ 941{
497 LOCK; 942 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
498
499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
500 PL_curstackinfo->si_type = PERLSI_MAIN; 943 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 944 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 945 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 946
504 PL_stack_base = AvARRAY(PL_curstack); 947 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 948 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 949 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 950
508 New(50,PL_tmps_stack,96,SV*); 951 New(50,PL_tmps_stack,32,SV*);
509 PL_tmps_floor = -1; 952 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 953 PL_tmps_ix = -1;
511 PL_tmps_max = 96; 954 PL_tmps_max = 32;
512 955
513 New(54,PL_markstack,16,I32); 956 New(54,PL_markstack,16,I32);
514 PL_markstack_ptr = PL_markstack; 957 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 958 PL_markstack_max = PL_markstack + 16;
516 959
517#ifdef SET_MARK_OFFSET 960#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 961 SET_MARK_OFFSET;
519#endif 962#endif
520 963
521 New(54,PL_scopestack,16,I32); 964 New(54,PL_scopestack,8,I32);
522 PL_scopestack_ix = 0; 965 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 966 PL_scopestack_max = 8;
967#if HAS_SCOPESTACK_NAME
968 New(54,PL_scopestack_name,8,const char*);
969#endif
524 970
525 New(54,PL_savestack,96,ANY); 971 New(54,PL_savestack,24,ANY);
526 PL_savestack_ix = 0; 972 PL_savestack_ix = 0;
527 PL_savestack_max = 96; 973 PL_savestack_max = 24;
974#if PERL_VERSION_ATLEAST (5,24,0)
975 /* perl 5.24 moves SS_MAXPUSH optimisation from */
976 /* the header macros to PL_savestack_max */
977 PL_savestack_max -= SS_MAXPUSH;
978#endif
528 979
980#if !PERL_VERSION_ATLEAST (5,10,0)
529 New(54,PL_retstack,8,OP*); 981 New(54,PL_retstack,4,OP*);
530 PL_retstack_ix = 0; 982 PL_retstack_ix = 0;
531 PL_retstack_max = 8; 983 PL_retstack_max = 4;
532 984#endif
533 UNLOCK;
534} 985}
986#endif
535 987
536/* 988/*
537 * destroy the stacks, the callchain etc... 989 * destroy the stacks, the callchain etc...
538 */ 990 */
539STATIC void 991static void
540destroy_stacks(pTHX) 992coro_destruct_stacks (pTHX)
541{ 993{
542 if (!IN_DESTRUCT)
543 {
544 /* is this ugly, I ask? */
545 LEAVE_SCOPE (0);
546
547 /* sure it is, but more important: is it correct?? :/ */
548 FREETMPS;
549
550 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
551 }
552
553 while (PL_curstackinfo->si_next) 994 while (PL_curstackinfo->si_next)
554 PL_curstackinfo = PL_curstackinfo->si_next; 995 PL_curstackinfo = PL_curstackinfo->si_next;
555 996
556 while (PL_curstackinfo) 997 while (PL_curstackinfo)
557 { 998 {
558 PERL_SI *p = PL_curstackinfo->si_prev; 999 PERL_SI *p = PL_curstackinfo->si_prev;
559 1000
560 { /*D*//*remove*/
561 dSP;
562 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
563 PUTBACK; /* possibly superfluous */
564 }
565
566 if (!IN_DESTRUCT) 1001 if (!IN_DESTRUCT)
567 {
568 dounwind (-1);/*D*//*remove*/
569 SvREFCNT_dec (PL_curstackinfo->si_stack); 1002 SvREFCNT_dec (PL_curstackinfo->si_stack);
570 }
571 1003
572 Safefree (PL_curstackinfo->si_cxstack); 1004 Safefree (PL_curstackinfo->si_cxstack);
573 Safefree (PL_curstackinfo); 1005 Safefree (PL_curstackinfo);
574 PL_curstackinfo = p; 1006 PL_curstackinfo = p;
575 } 1007 }
576 1008
577 Safefree (PL_tmps_stack); 1009 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 1010 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 1011 Safefree (PL_scopestack);
1012#if HAS_SCOPESTACK_NAME
1013 Safefree (PL_scopestack_name);
1014#endif
580 Safefree (PL_savestack); 1015 Safefree (PL_savestack);
1016#if !PERL_VERSION_ATLEAST (5,10,0)
581 Safefree (PL_retstack); 1017 Safefree (PL_retstack);
582}
583
584static void
585allocate_stack (Coro__State ctx, int alloc)
586{
587 coro_stack *stack;
588
589 New (0, stack, 1, coro_stack);
590
591 stack->refcnt = 1;
592 stack->usecnt = 1;
593 stack->gencnt = ctx->gencnt = 0;
594
595 if (alloc)
596 {
597#if HAVE_MMAP
598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600 if (stack->sptr == (void *)-1)
601#endif 1018#endif
1019}
1020
1021#define CORO_RSS \
1022 rss += sizeof (SYM (curstackinfo)); \
1023 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1024 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1025 rss += SYM (tmps_max) * sizeof (SV *); \
1026 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1027 rss += SYM (scopestack_max) * sizeof (I32); \
1028 rss += SYM (savestack_max) * sizeof (ANY);
1029
1030static size_t
1031coro_rss (pTHX_ struct coro *coro)
1032{
1033 size_t rss = sizeof (*coro);
1034
1035 if (coro->mainstack)
1036 {
1037 if (coro->flags & CF_RUNNING)
602 { 1038 {
603 /*FIXME*//*D*//* reasonable stack size! */ 1039 #define SYM(sym) PL_ ## sym
604 stack->ssize = - (STACKSIZE * sizeof (long)); 1040 CORO_RSS;
605 New (0, stack->sptr, STACKSIZE, long); 1041 #undef SYM
606 } 1042 }
1043 else
1044 {
1045 #define SYM(sym) coro->slot->sym
1046 CORO_RSS;
1047 #undef SYM
1048 }
607 } 1049 }
1050
1051 return rss;
1052}
1053
1054/** provide custom get/set/clear methods for %SIG elements ******************/
1055
1056/* apparently < 5.8.8 */
1057#ifndef MgPV_nolen_const
1058#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1059 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1060 (const char*)(mg)->mg_ptr)
1061#endif
1062
1063/* this will be a patched copy of PL_vtbl_sigelem */
1064static MGVTBL coro_sigelem_vtbl;
1065
1066static int ecb_cold
1067coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1068{
1069 char *key = SvPV_nolen ((SV *)name);
1070
1071 /* do what mg_copy normally does */
1072 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1073 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1074
1075 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1076 if (*key == '_'
1077 && (strEQ (key, "__DIE__")
1078 || strEQ (key, "__WARN__")))
1079 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1080
1081 return 1;
1082}
1083
1084/* perl does not have a %SIG vtbl, we provide one so we can override */
1085/* the magic vtbl for the __DIE__ and __WARN__ members */
1086static const MGVTBL coro_sig_vtbl = {
1087 0, 0, 0, 0, 0,
1088 coro_sig_copy
1089};
1090
1091/*
1092 * This overrides the default magic get method of %SIG elements.
1093 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1094 * and instead of trying to save and restore the hash elements (extremely slow),
1095 * we just provide our own readback here.
1096 */
1097static int ecb_cold
1098coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1099{
1100 const char *s = MgPV_nolen_const (mg);
1101 /* the key must be either __DIE__ or __WARN__ here */
1102 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1103
1104 SV *ssv;
1105
1106 if (!*svp)
1107 ssv = &PL_sv_undef;
1108 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1109 ssv = sv_2mortal (newRV_inc (*svp));
608 else 1110 else
609 stack->sptr = 0; 1111 ssv = *svp;
610 1112
611 ctx->stack = stack; 1113 sv_setsv (sv, ssv);
1114 return 0;
612} 1115}
613 1116
1117static int ecb_cold
1118coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121 /* the key must be either __DIE__ or __WARN__ here */
1122 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1123
1124 SV *old = *svp;
1125 *svp = 0;
1126 SvREFCNT_dec (old);
1127 return 0;
1128}
1129
1130static int ecb_cold
1131coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1132{
1133 const char *s = MgPV_nolen_const (mg);
1134 /* the key must be either __DIE__ or __WARN__ here */
1135 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1136
1137 SV *old = *svp;
1138 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1139 SvREFCNT_dec (old);
1140 return 0;
1141}
1142
1143static void
1144prepare_nop (pTHX_ struct coro_transfer_args *ta)
1145{
1146 /* kind of mega-hacky, but works */
1147 ta->next = ta->prev = (struct coro *)ta;
1148}
1149
614static void 1150static int
615deallocate_stack (Coro__State ctx) 1151slf_check_nop (pTHX_ struct CoroSLF *frame)
616{ 1152{
617 coro_stack *stack = ctx->stack; 1153 return 0;
618
619 ctx->stack = 0;
620
621 if (stack)
622 {
623 if (!--stack->refcnt)
624 {
625#ifdef HAVE_MMAP
626 if (stack->ssize > 0 && stack->sptr)
627 munmap (stack->sptr, stack->ssize);
628 else
629#endif
630 Safefree (stack->sptr);
631
632 Safefree (stack);
633 }
634 else if (ctx->gencnt == stack->gencnt)
635 --stack->usecnt;
636 }
637} 1154}
638 1155
639static void 1156static int
640setup_coro (void *arg) 1157slf_check_repeat (pTHX_ struct CoroSLF *frame)
1158{
1159 return 1;
1160}
1161
1162/** coroutine stack handling ************************************************/
1163
1164static UNOP init_perl_op;
1165
1166ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1167init_perl (pTHX_ struct coro *coro)
641{ 1168{
642 /* 1169 /*
643 * emulate part of the perl startup here. 1170 * emulate part of the perl startup here.
644 */ 1171 */
1172 coro_init_stacks (aTHX);
1173
1174 PL_runops = RUNOPS_DEFAULT;
1175 PL_curcop = &PL_compiling;
1176 PL_in_eval = EVAL_NULL;
1177 PL_comppad = 0;
1178 PL_comppad_name = 0;
1179 PL_comppad_name_fill = 0;
1180 PL_comppad_name_floor = 0;
1181 PL_curpm = 0;
1182 PL_curpad = 0;
1183 PL_localizing = 0;
1184 PL_restartop = 0;
1185#if PERL_VERSION_ATLEAST (5,10,0)
1186 PL_parser = 0;
1187#endif
1188 PL_hints = 0;
1189
1190 /* recreate the die/warn hooks */
1191 PL_diehook = SvREFCNT_inc (rv_diehook);
1192 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1193
1194 GvSV (PL_defgv) = newSV (0);
1195 GvAV (PL_defgv) = coro->args; coro->args = 0;
1196 GvSV (PL_errgv) = newSV (0);
1197 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1198 GvHV (PL_hintgv) = newHV ();
1199#if PERL_VERSION_ATLEAST (5,10,0)
1200 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1201#endif
1202 PL_rs = newSVsv (GvSV (irsgv));
1203 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1204
1205 {
1206 dSP;
1207 UNOP myop;
1208
1209 Zero (&myop, 1, UNOP);
1210 myop.op_next = Nullop;
1211 myop.op_type = OP_ENTERSUB;
1212 myop.op_flags = OPf_WANT_VOID;
1213
1214 PUSHMARK (SP);
1215 PUSHs ((SV *)coro->startcv);
1216 PUTBACK;
1217 PL_op = (OP *)&myop;
1218 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1219 }
1220
1221 /* this newly created coroutine might be run on an existing cctx which most
1222 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1223 */
1224 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1225 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1226 slf_frame.destroy = 0;
1227
1228 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1229 init_perl_op.op_next = PL_op;
1230 init_perl_op.op_type = OP_ENTERSUB;
1231 init_perl_op.op_ppaddr = pp_slf;
1232 /* no flags etc. required, as an init function won't be called */
1233
1234 PL_op = (OP *)&init_perl_op;
1235
1236 /* copy throw, in case it was set before init_perl */
1237 CORO_THROW = coro->except;
1238
1239 SWAP_SVS_ENTER (coro);
1240
1241 if (ecb_expect_false (enable_times))
1242 {
1243 coro_times_update ();
1244 coro_times_sub (coro);
1245 }
1246}
1247
1248static void
1249coro_unwind_stacks (pTHX)
1250{
1251 if (!IN_DESTRUCT)
1252 {
1253 /* restore all saved variables and stuff */
1254 LEAVE_SCOPE (0);
1255 assert (PL_tmps_floor == -1);
1256
1257 /* free all temporaries */
1258 FREETMPS;
1259 assert (PL_tmps_ix == -1);
1260
1261 /* unwind all extra stacks */
1262 POPSTACK_TO (PL_mainstack);
1263
1264 /* unwind main stack */
1265 dounwind (-1);
1266 }
1267}
1268
1269static void
1270destroy_perl (pTHX_ struct coro *coro)
1271{
1272 SV *svf [9];
1273
1274 {
1275 SV *old_current = SvRV (coro_current);
1276 struct coro *current = SvSTATE (old_current);
1277
1278 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1279
1280 save_perl (aTHX_ current);
1281
1282 /* this will cause transfer_check to croak on block*/
1283 SvRV_set (coro_current, (SV *)coro->hv);
1284
1285 load_perl (aTHX_ coro);
1286
1287 /* restore swapped sv's */
1288 SWAP_SVS_LEAVE (coro);
1289
1290 coro_unwind_stacks (aTHX);
1291
1292 coro_destruct_stacks (aTHX);
1293
1294 /* now save some sv's to be free'd later */
1295 svf [0] = GvSV (PL_defgv);
1296 svf [1] = (SV *)GvAV (PL_defgv);
1297 svf [2] = GvSV (PL_errgv);
1298 svf [3] = (SV *)PL_defoutgv;
1299 svf [4] = PL_rs;
1300 svf [5] = GvSV (irsgv);
1301 svf [6] = (SV *)GvHV (PL_hintgv);
1302 svf [7] = PL_diehook;
1303 svf [8] = PL_warnhook;
1304 assert (9 == sizeof (svf) / sizeof (*svf));
1305
1306 SvRV_set (coro_current, old_current);
1307
1308 load_perl (aTHX_ current);
1309 }
1310
1311 {
1312 unsigned int i;
1313
1314 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1315 SvREFCNT_dec (svf [i]);
1316
1317 SvREFCNT_dec (coro->saved_deffh);
1318 SvREFCNT_dec (coro->rouse_cb);
1319 SvREFCNT_dec (coro->invoke_cb);
1320 SvREFCNT_dec (coro->invoke_av);
1321 SvREFCNT_dec (coro->on_enter_xs);
1322 SvREFCNT_dec (coro->on_leave_xs);
1323 }
1324}
1325
1326ecb_inline void
1327free_coro_mortal (pTHX)
1328{
1329 if (ecb_expect_true (coro_mortal))
1330 {
1331 SvREFCNT_dec ((SV *)coro_mortal);
1332 coro_mortal = 0;
1333 }
1334}
1335
1336static int
1337runops_trace (pTHX)
1338{
1339 COP *oldcop = 0;
1340 int oldcxix = -2;
1341
1342 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1343 {
1344 PERL_ASYNC_CHECK ();
1345
1346 if (cctx_current->flags & CC_TRACE_ALL)
1347 {
1348 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1349 {
1350 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1351 SV **bot, **top;
1352 AV *av = newAV (); /* return values */
1353 SV **cb;
1354 dSP;
1355
1356 GV *gv = CvGV (cx->blk_sub.cv);
1357 SV *fullname = sv_2mortal (newSV (0));
1358 if (isGV (gv))
1359 gv_efullname3 (fullname, gv, 0);
1360
1361 bot = PL_stack_base + cx->blk_oldsp + 1;
1362 top = cx->blk_gimme == G_ARRAY ? SP + 1
1363 : cx->blk_gimme == G_SCALAR ? bot + 1
1364 : bot;
1365
1366 av_extend (av, top - bot);
1367 while (bot < top)
1368 av_push (av, SvREFCNT_inc_NN (*bot++));
1369
1370 PL_runops = RUNOPS_DEFAULT;
1371 ENTER;
1372 SAVETMPS;
1373 EXTEND (SP, 3);
1374 PUSHMARK (SP);
1375 PUSHs (&PL_sv_no);
1376 PUSHs (fullname);
1377 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1378 PUTBACK;
1379 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1380 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1381 SPAGAIN;
1382 FREETMPS;
1383 LEAVE;
1384 PL_runops = runops_trace;
1385 }
1386
1387 if (oldcop != PL_curcop)
1388 {
1389 oldcop = PL_curcop;
1390
1391 if (PL_curcop != &PL_compiling)
1392 {
1393 SV **cb;
1394
1395 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1396 {
1397 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1398
1399 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1400 {
1401 dSP;
1402 GV *gv = CvGV (cx->blk_sub.cv);
1403 SV *fullname = sv_2mortal (newSV (0));
1404
1405 if (isGV (gv))
1406 gv_efullname3 (fullname, gv, 0);
1407
1408 PL_runops = RUNOPS_DEFAULT;
1409 ENTER;
1410 SAVETMPS;
1411 EXTEND (SP, 3);
1412 PUSHMARK (SP);
1413 PUSHs (&PL_sv_yes);
1414 PUSHs (fullname);
1415 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1416 PUTBACK;
1417 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1418 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1419 SPAGAIN;
1420 FREETMPS;
1421 LEAVE;
1422 PL_runops = runops_trace;
1423 }
1424
1425 oldcxix = cxstack_ix;
1426 }
1427
1428 if (cctx_current->flags & CC_TRACE_LINE)
1429 {
1430 dSP;
1431
1432 PL_runops = RUNOPS_DEFAULT;
1433 ENTER;
1434 SAVETMPS;
1435 EXTEND (SP, 3);
1436 PL_runops = RUNOPS_DEFAULT;
1437 PUSHMARK (SP);
1438 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1439 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1440 PUTBACK;
1441 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1442 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1443 SPAGAIN;
1444 FREETMPS;
1445 LEAVE;
1446 PL_runops = runops_trace;
1447 }
1448 }
1449 }
1450 }
1451 }
1452
1453 TAINT_NOT;
1454 return 0;
1455}
1456
1457static struct CoroSLF cctx_ssl_frame;
1458
1459static void
1460slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1461{
1462 ta->prev = 0;
1463}
1464
1465static int
1466slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1467{
1468 *frame = cctx_ssl_frame;
1469
1470 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1471}
1472
1473/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1474static void ecb_noinline
1475cctx_prepare (pTHX)
1476{
1477 PL_top_env = &PL_start_env;
1478
1479 if (cctx_current->flags & CC_TRACE)
1480 PL_runops = runops_trace;
1481
1482 /* we already must be executing an SLF op, there is no other valid way
1483 * that can lead to creation of a new cctx */
1484 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1485 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1486
1487 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1488 cctx_ssl_frame = slf_frame;
1489
1490 slf_frame.prepare = slf_prepare_set_stacklevel;
1491 slf_frame.check = slf_check_set_stacklevel;
1492}
1493
1494/* the tail of transfer: execute stuff we can only do after a transfer */
1495ecb_inline void
1496transfer_tail (pTHX)
1497{
1498 free_coro_mortal (aTHX);
1499}
1500
1501/* try to exit the same way perl's main function would do */
1502/* we do not bother resetting the environment or other things *7
1503/* that are not, uhm, essential */
1504/* this obviously also doesn't work when perl is embedded */
1505static void ecb_noinline ecb_cold
1506perlish_exit (pTHX)
1507{
1508 int exitstatus = perl_destruct (PL_curinterp);
1509 perl_free (PL_curinterp);
1510 exit (exitstatus);
1511}
1512
1513/*
1514 * this is a _very_ stripped down perl interpreter ;)
1515 */
1516static void
1517cctx_run (void *arg)
1518{
1519#ifdef USE_ITHREADS
1520# if CORO_PTHREAD
1521 PERL_SET_CONTEXT (coro_thx);
1522# endif
1523#endif
1524 {
1525 dTHX;
1526
1527 /* normally we would need to skip the entersub here */
1528 /* not doing so will re-execute it, which is exactly what we want */
1529 /* PL_nop = PL_nop->op_next */
1530
1531 /* inject a fake subroutine call to cctx_init */
1532 cctx_prepare (aTHX);
1533
1534 /* cctx_run is the alternative tail of transfer() */
1535 transfer_tail (aTHX);
1536
1537 /* somebody or something will hit me for both perl_run and PL_restartop */
1538 PL_restartop = PL_op;
1539 perl_run (PL_curinterp);
1540 /*
1541 * Unfortunately, there is no way to get at the return values of the
1542 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1543 * runtime errors here, as this is just a random interpreter, not a thread.
1544 */
1545
1546 /*
1547 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1548 * requires PL_scopestack_ix, so do it here if required.
1549 */
1550 if (!PL_scopestack_ix)
1551 ENTER;
1552
1553 /*
1554 * If perl-run returns we assume exit() was being called or the coro
1555 * fell off the end, which seems to be the only valid (non-bug)
1556 * reason for perl_run to return. We try to mimic whatever perl is normally
1557 * doing in that case. YMMV.
1558 */
1559 perlish_exit (aTHX);
1560 }
1561}
1562
1563static coro_cctx *
1564cctx_new (void)
1565{
1566 coro_cctx *cctx;
1567
1568 ++cctx_count;
1569 New (0, cctx, 1, coro_cctx);
1570
1571 cctx->gen = cctx_gen;
1572 cctx->flags = 0;
1573 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1574
1575 return cctx;
1576}
1577
1578/* create a new cctx only suitable as source */
1579static coro_cctx *
1580cctx_new_empty (void)
1581{
1582 coro_cctx *cctx = cctx_new ();
1583
1584 cctx->stack.sptr = 0;
1585 coro_create (&cctx->cctx, 0, 0, 0, 0);
1586
1587 return cctx;
1588}
1589
1590/* create a new cctx suitable as destination/running a perl interpreter */
1591static coro_cctx *
1592cctx_new_run (void)
1593{
1594 coro_cctx *cctx = cctx_new ();
1595
1596 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1597 {
1598 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1599 _exit (EXIT_FAILURE);
1600 }
1601
1602 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1603
1604 return cctx;
1605}
1606
1607static void
1608cctx_destroy (coro_cctx *cctx)
1609{
1610 if (!cctx)
1611 return;
1612
1613 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1614
1615 --cctx_count;
1616 coro_destroy (&cctx->cctx);
1617
1618 coro_stack_free (&cctx->stack);
1619
1620 Safefree (cctx);
1621}
1622
1623/* wether this cctx should be destructed */
1624#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1625
1626static coro_cctx *
1627cctx_get (pTHX)
1628{
1629 while (ecb_expect_true (cctx_first))
1630 {
1631 coro_cctx *cctx = cctx_first;
1632 cctx_first = cctx->next;
1633 --cctx_idle;
1634
1635 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1636 return cctx;
1637
1638 cctx_destroy (cctx);
1639 }
1640
1641 return cctx_new_run ();
1642}
1643
1644static void
1645cctx_put (coro_cctx *cctx)
1646{
1647 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1648
1649 /* free another cctx if overlimit */
1650 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1651 {
1652 coro_cctx *first = cctx_first;
1653 cctx_first = first->next;
1654 --cctx_idle;
1655
1656 cctx_destroy (first);
1657 }
1658
1659 ++cctx_idle;
1660 cctx->next = cctx_first;
1661 cctx_first = cctx;
1662}
1663
1664/** coroutine switching *****************************************************/
1665
1666static void
1667transfer_check (pTHX_ struct coro *prev, struct coro *next)
1668{
1669 /* TODO: throwing up here is considered harmful */
1670
1671 if (ecb_expect_true (prev != next))
1672 {
1673 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1674 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1675
1676 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1677 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1678
1679#if !PERL_VERSION_ATLEAST (5,10,0)
1680 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1681 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1682#endif
1683 }
1684}
1685
1686/* always use the TRANSFER macro */
1687static void ecb_noinline /* noinline so we have a fixed stackframe */
1688transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1689{
1690 dSTACKLEVEL;
1691
1692 /* sometimes transfer is only called to set idle_sp */
1693 if (ecb_expect_false (!prev))
1694 {
1695 cctx_current->idle_sp = STACKLEVEL;
1696 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1697 }
1698 else if (ecb_expect_true (prev != next))
1699 {
1700 coro_cctx *cctx_prev;
1701
1702 if (ecb_expect_false (prev->flags & CF_NEW))
1703 {
1704 /* create a new empty/source context */
1705 prev->flags &= ~CF_NEW;
1706 prev->flags |= CF_RUNNING;
1707 }
1708
1709 prev->flags &= ~CF_RUNNING;
1710 next->flags |= CF_RUNNING;
1711
1712 /* first get rid of the old state */
1713 save_perl (aTHX_ prev);
1714
1715 if (ecb_expect_false (next->flags & CF_NEW))
1716 {
1717 /* need to start coroutine */
1718 next->flags &= ~CF_NEW;
1719 /* setup coroutine call */
1720 init_perl (aTHX_ next);
1721 }
1722 else
1723 load_perl (aTHX_ next);
1724
1725 /* possibly untie and reuse the cctx */
1726 if (ecb_expect_true (
1727 cctx_current->idle_sp == STACKLEVEL
1728 && !(cctx_current->flags & CC_TRACE)
1729 && !force_cctx
1730 ))
1731 {
1732 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1733 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1734
1735 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1736 /* without this the next cctx_get might destroy the running cctx while still in use */
1737 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1738 if (ecb_expect_true (!next->cctx))
1739 next->cctx = cctx_get (aTHX);
1740
1741 cctx_put (cctx_current);
1742 }
1743 else
1744 prev->cctx = cctx_current;
1745
1746 ++next->usecount;
1747
1748 cctx_prev = cctx_current;
1749 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1750
1751 next->cctx = 0;
1752
1753 if (ecb_expect_false (cctx_prev != cctx_current))
1754 {
1755 cctx_prev->top_env = PL_top_env;
1756 PL_top_env = cctx_current->top_env;
1757 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1758 }
1759
1760 transfer_tail (aTHX);
1761 }
1762}
1763
1764#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1765#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1766
1767/** high level stuff ********************************************************/
1768
1769/* this function is actually Coro, not Coro::State, but we call it from here */
1770/* because it is convenient - but it hasn't been declared yet for that reason */
1771static void
1772coro_call_on_destroy (pTHX_ struct coro *coro);
1773
1774static void
1775coro_state_destroy (pTHX_ struct coro *coro)
1776{
1777 if (coro->flags & CF_ZOMBIE)
1778 return;
1779
1780 slf_destroy (aTHX_ coro);
1781
1782 coro->flags |= CF_ZOMBIE;
1783
1784 if (coro->flags & CF_READY)
1785 {
1786 /* reduce nready, as destroying a ready coro effectively unreadies it */
1787 /* alternative: look through all ready queues and remove the coro */
1788 --coro_nready;
1789 }
1790 else
1791 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1792
1793 if (coro->next) coro->next->prev = coro->prev;
1794 if (coro->prev) coro->prev->next = coro->next;
1795 if (coro == coro_first) coro_first = coro->next;
1796
1797 if (coro->mainstack
1798 && coro->mainstack != main_mainstack
1799 && coro->slot
1800 && !PL_dirty)
1801 destroy_perl (aTHX_ coro);
1802
1803 cctx_destroy (coro->cctx);
1804 SvREFCNT_dec (coro->startcv);
1805 SvREFCNT_dec (coro->args);
1806 SvREFCNT_dec (coro->swap_sv);
1807 SvREFCNT_dec (CORO_THROW);
1808
1809 coro_call_on_destroy (aTHX_ coro);
1810
1811 /* more destruction mayhem in coro_state_free */
1812}
1813
1814static int
1815coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1816{
1817 struct coro *coro = (struct coro *)mg->mg_ptr;
1818 mg->mg_ptr = 0;
1819
1820 coro_state_destroy (aTHX_ coro);
1821 SvREFCNT_dec (coro->on_destroy);
1822 SvREFCNT_dec (coro->status);
1823
1824 Safefree (coro);
1825
1826 return 0;
1827}
1828
1829static int ecb_cold
1830coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1831{
1832 /* called when perl clones the current process the slow way (windows process emulation) */
1833 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1834 mg->mg_ptr = 0;
1835 mg->mg_virtual = 0;
1836
1837 return 0;
1838}
1839
1840static MGVTBL coro_state_vtbl = {
1841 0, 0, 0, 0,
1842 coro_state_free,
1843 0,
1844#ifdef MGf_DUP
1845 coro_state_dup,
1846#else
1847# define MGf_DUP 0
1848#endif
1849};
1850
1851static void
1852prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1853{
1854 ta->prev = SvSTATE (prev_sv);
1855 ta->next = SvSTATE (next_sv);
1856 TRANSFER_CHECK (*ta);
1857}
1858
1859static void
1860api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1861{
1862 struct coro_transfer_args ta;
1863
1864 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1865 TRANSFER (ta, 1);
1866}
1867
1868/** Coro ********************************************************************/
1869
1870ecb_inline void
1871coro_enq (pTHX_ struct coro *coro)
1872{
1873 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1874
1875 SvREFCNT_inc_NN (coro->hv);
1876
1877 coro->next_ready = 0;
1878 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1879 ready [1] = coro;
1880}
1881
1882ecb_inline struct coro *
1883coro_deq (pTHX)
1884{
1885 int prio;
1886
1887 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1888 {
1889 struct coro **ready = coro_ready [prio];
1890
1891 if (ready [0])
1892 {
1893 struct coro *coro = ready [0];
1894 ready [0] = coro->next_ready;
1895 return coro;
1896 }
1897 }
1898
1899 return 0;
1900}
1901
1902static void
1903invoke_sv_ready_hook_helper (void)
1904{
645 dTHX; 1905 dTHX;
646 dSP; 1906 dSP;
647 Coro__State ctx = (Coro__State)arg;
648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649 1907
650 coro_init_stacks (aTHX); 1908 ENTER;
651 /*PL_curcop = 0;*/ 1909 SAVETMPS;
652 /*PL_in_eval = PL_in_eval;*/ /* inherit */
653 SvREFCNT_dec (GvAV (PL_defgv));
654 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
655 1910
656 SPAGAIN;
657
658 if (ctx->stack)
659 {
660 ctx->cursp = 0;
661
662 PUSHMARK(SP); 1911 PUSHMARK (SP);
663 PUTBACK; 1912 PUTBACK;
664 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1913 call_sv (coro_readyhook, G_VOID | G_DISCARD);
665 1914
666 if (SvTRUE (ERRSV)) 1915 FREETMPS;
667 croak (NULL); 1916 LEAVE;
668 else 1917}
669 croak ("FATAL: CCTXT coroutine returned!"); 1918
1919static int
1920api_ready (pTHX_ SV *coro_sv)
1921{
1922 struct coro *coro = SvSTATE (coro_sv);
1923
1924 if (coro->flags & CF_READY)
1925 return 0;
1926
1927 coro->flags |= CF_READY;
1928
1929 coro_enq (aTHX_ coro);
1930
1931 if (!coro_nready++)
1932 if (coroapi.readyhook)
1933 coroapi.readyhook ();
1934
1935 return 1;
1936}
1937
1938static int
1939api_is_ready (pTHX_ SV *coro_sv)
1940{
1941 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1942}
1943
1944/* expects to own a reference to next->hv */
1945ecb_inline void
1946prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1947{
1948 SV *prev_sv = SvRV (coro_current);
1949
1950 ta->prev = SvSTATE_hv (prev_sv);
1951 ta->next = next;
1952
1953 TRANSFER_CHECK (*ta);
1954
1955 SvRV_set (coro_current, (SV *)next->hv);
1956
1957 free_coro_mortal (aTHX);
1958 coro_mortal = prev_sv;
1959}
1960
1961static void
1962prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1963{
1964 for (;;)
670 } 1965 {
671 else 1966 struct coro *next = coro_deq (aTHX);
672 {
673 UNOP myop;
674 1967
675 PL_op = (OP *)&myop; 1968 if (ecb_expect_true (next))
676
677 Zero(&myop, 1, UNOP);
678 myop.op_next = Nullop;
679 myop.op_flags = OPf_WANT_VOID;
680
681 PUSHMARK(SP);
682 XPUSHs (sub_init);
683 /*
684 * the next line is slightly wrong, as PL_op->op_next
685 * is actually being executed so we skip the first op.
686 * that doesn't matter, though, since it is only
687 * pp_nextstate and we never return...
688 * ah yes, and I don't care anyways ;)
689 */
690 PUTBACK;
691 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692 SPAGAIN;
693
694 ENTER; /* necessary e.g. for dounwind */
695 }
696}
697
698static void
699continue_coro (void *arg)
700{
701 /*
702 * this is a _very_ stripped down perl interpreter ;)
703 */
704 dTHX;
705 Coro__State ctx = (Coro__State)arg;
706 JMPENV coro_start_env;
707
708 PL_top_env = &ctx->start_env;
709
710 ctx->cursp = 0;
711 PL_op = PL_op->op_next;
712 CALLRUNOPS(aTHX);
713
714 abort ();
715}
716
717STATIC void
718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719{
720 dSTACKLEVEL;
721
722 if (prev != next)
723 {
724 if (next->mainstack)
725 { 1969 {
726 LOCK; 1970 /* cannot transfer to destroyed coros, skip and look for next */
727 SAVE (prev, flags); 1971 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
728 LOAD (next); 1972 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
729 UNLOCK; 1973 else
730
731 /* mark this state as in-use */
732 next->mainstack = 0;
733 next->tmps_ix = -2;
734
735 /* stacklevel changed? if yes, grab the stack for us! */
736 if (flags & TRANSFER_SAVE_CCTXT)
737 { 1974 {
738 if (!prev->stack) 1975 next->flags &= ~CF_READY;
739 allocate_stack (prev, 0); 1976 --coro_nready;
740 else if (prev->cursp != stacklevel 1977
741 && prev->stack->usecnt > 1) 1978 prepare_schedule_to (aTHX_ ta, next);
742 { 1979 break;
743 prev->gencnt = ++prev->stack->gencnt;
744 prev->stack->usecnt = 1;
745 }
746
747 /* has our stack been invalidated? */
748 if (next->stack && next->stack->gencnt != next->gencnt)
749 {
750 deallocate_stack (next);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 continue_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 }
756
757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758 prev->cursp = stacklevel;
759 /* don't add any code here */
760 } 1980 }
761 else
762 next->cursp = stacklevel;
763 } 1981 }
764 else if (next->tmps_ix == -2)
765 croak ("tried to transfer to running coroutine");
766 else 1982 else
767 { 1983 {
768 LOCK; 1984 /* nothing to schedule: call the idle handler */
769 SAVE (prev, -1); /* first get rid of the old state */ 1985 if (SvROK (sv_idle)
770 UNLOCK; 1986 && SvOBJECT (SvRV (sv_idle)))
771
772 if (flags & TRANSFER_SAVE_CCTXT)
773 { 1987 {
774 if (!prev->stack) 1988 if (SvRV (sv_idle) == SvRV (coro_current))
775 allocate_stack (prev, 0);
776
777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778 { 1989 {
779 PL_top_env = &next->start_env; 1990 require_pv ("Carp");
780 1991
781 setup_coro (next); 1992 {
782 next->cursp = stacklevel; 1993 dSP;
783 1994
784 prev->stack->refcnt++; 1995 ENTER;
785 prev->stack->usecnt++; 1996 SAVETMPS;
786 next->stack = prev->stack; 1997
787 next->gencnt = prev->gencnt; 1998 PUSHMARK (SP);
1999 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2000 PUTBACK;
2001 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2002
2003 FREETMPS;
2004 LEAVE;
2005 }
788 } 2006 }
789 else 2007
790 { 2008 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
791 assert (!next->stack); 2009 api_ready (aTHX_ SvRV (sv_idle));
792 allocate_stack (next, 1); 2010 --coro_nready;
793 coro_create (&(next->stack->cctx),
794 setup_coro, (void *)next,
795 next->stack->sptr, labs (next->stack->ssize));
796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
798 /* don't add any code here */
799 }
800 } 2011 }
801 else 2012 else
802 { 2013 {
803 setup_coro (next); 2014 /* TODO: deprecated, remove, cannot work reliably *//*D*/
804 next->cursp = stacklevel; 2015 dSP;
2016
2017 ENTER;
2018 SAVETMPS;
2019
2020 PUSHMARK (SP);
2021 PUTBACK;
2022 call_sv (sv_idle, G_VOID | G_DISCARD);
2023
2024 FREETMPS;
2025 LEAVE;
805 } 2026 }
806 } 2027 }
807 } 2028 }
2029}
808 2030
809 LOCK; 2031ecb_inline void
2032prepare_cede (pTHX_ struct coro_transfer_args *ta)
2033{
2034 api_ready (aTHX_ coro_current);
2035 prepare_schedule (aTHX_ ta);
2036}
2037
2038ecb_inline void
2039prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2040{
2041 SV *prev = SvRV (coro_current);
2042
810 if (coro_mortal) 2043 if (coro_nready)
811 {
812 SvREFCNT_dec (coro_mortal);
813 coro_mortal = 0;
814 } 2044 {
815 UNLOCK; 2045 prepare_schedule (aTHX_ ta);
816} 2046 api_ready (aTHX_ prev);
817
818#define SV_CORO(sv,func) \
819 do { \
820 if (SvROK (sv)) \
821 sv = SvRV (sv); \
822 \
823 if (SvTYPE (sv) == SVt_PVHV) \
824 { \
825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826 \
827 if (!he) \
828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829 \
830 (sv) = SvRV (HeVAL(he)); \
831 } \
832 \
833 /* must also be changed inside Coro::Cont::yield */ \
834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836 \
837 } while(0)
838
839#define SvSTATE(sv) (struct coro *)SvIV (sv)
840
841static void
842api_transfer(pTHX_ SV *prev, SV *next, int flags)
843{
844 SV_CORO (prev, "Coro::transfer");
845 SV_CORO (next, "Coro::transfer");
846
847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
848}
849
850/** Coro ********************************************************************/
851
852#define PRIO_MAX 3
853#define PRIO_HIGH 1
854#define PRIO_NORMAL 0
855#define PRIO_LOW -1
856#define PRIO_IDLE -3
857#define PRIO_MIN -4
858
859/* for Coro.pm */
860static GV *coro_current, *coro_idle;
861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
862static int coro_nready;
863
864static void
865coro_enq (pTHX_ SV *sv)
866{
867 if (SvTYPE (sv) == SVt_PVHV)
868 { 2047 }
869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2048 else
870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2049 prepare_nop (aTHX_ ta);
2050}
871 2051
872 prio = prio > PRIO_MAX ? PRIO_MAX 2052static void
873 : prio < PRIO_MIN ? PRIO_MIN 2053api_schedule (pTHX)
874 : prio; 2054{
2055 struct coro_transfer_args ta;
875 2056
876 av_push (coro_ready [prio - PRIO_MIN], sv); 2057 prepare_schedule (aTHX_ &ta);
877 coro_nready++; 2058 TRANSFER (ta, 1);
2059}
878 2060
2061static void
2062api_schedule_to (pTHX_ SV *coro_sv)
2063{
2064 struct coro_transfer_args ta;
2065 struct coro *next = SvSTATE (coro_sv);
2066
2067 SvREFCNT_inc_NN (coro_sv);
2068 prepare_schedule_to (aTHX_ &ta, next);
2069}
2070
2071static int
2072api_cede (pTHX)
2073{
2074 struct coro_transfer_args ta;
2075
2076 prepare_cede (aTHX_ &ta);
2077
2078 if (ecb_expect_true (ta.prev != ta.next))
2079 {
2080 TRANSFER (ta, 1);
879 return; 2081 return 1;
2082 }
2083 else
2084 return 0;
2085}
2086
2087static int
2088api_cede_notself (pTHX)
2089{
2090 if (coro_nready)
2091 {
2092 struct coro_transfer_args ta;
2093
2094 prepare_cede_notself (aTHX_ &ta);
2095 TRANSFER (ta, 1);
2096 return 1;
2097 }
2098 else
2099 return 0;
2100}
2101
2102static void
2103api_trace (pTHX_ SV *coro_sv, int flags)
2104{
2105 struct coro *coro = SvSTATE (coro_sv);
2106
2107 if (coro->flags & CF_RUNNING)
2108 croak ("cannot enable tracing on a running coroutine, caught");
2109
2110 if (flags & CC_TRACE)
2111 {
2112 if (!coro->cctx)
2113 coro->cctx = cctx_new_run ();
2114 else if (!(coro->cctx->flags & CC_TRACE))
2115 croak ("cannot enable tracing on coroutine with custom stack, caught");
2116
2117 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2118 }
2119 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2120 {
2121 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2122
2123 if (coro->flags & CF_RUNNING)
2124 PL_runops = RUNOPS_DEFAULT;
2125 else
2126 coro->slot->runops = RUNOPS_DEFAULT;
2127 }
2128}
2129
2130static void
2131coro_push_av (pTHX_ AV *av, I32 gimme_v)
2132{
2133 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2134 {
2135 dSP;
2136
2137 if (gimme_v == G_SCALAR)
2138 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2139 else
2140 {
2141 int i;
2142 EXTEND (SP, AvFILLp (av) + 1);
2143
2144 for (i = 0; i <= AvFILLp (av); ++i)
2145 PUSHs (AvARRAY (av)[i]);
2146 }
2147
2148 PUTBACK;
2149 }
2150}
2151
2152static void
2153coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2154{
2155 if (!coro->on_destroy)
2156 coro->on_destroy = newAV ();
2157
2158 av_push (coro->on_destroy, cb);
2159}
2160
2161static void
2162slf_destroy_join (pTHX_ struct CoroSLF *frame)
2163{
2164 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2165}
2166
2167static int
2168slf_check_join (pTHX_ struct CoroSLF *frame)
2169{
2170 struct coro *coro = (struct coro *)frame->data;
2171
2172 if (!coro->status)
2173 return 1;
2174
2175 frame->destroy = 0;
2176
2177 coro_push_av (aTHX_ coro->status, GIMME_V);
2178
2179 SvREFCNT_dec ((SV *)coro->hv);
2180
2181 return 0;
2182}
2183
2184static void
2185slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2186{
2187 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2188
2189 if (items > 1)
2190 croak ("join called with too many arguments");
2191
2192 if (coro->status)
2193 frame->prepare = prepare_nop;
2194 else
2195 {
2196 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2197 frame->prepare = prepare_schedule;
2198 }
2199
2200 frame->check = slf_check_join;
2201 frame->destroy = slf_destroy_join;
2202 frame->data = (void *)coro;
2203 SvREFCNT_inc (coro->hv);
2204}
2205
2206static void
2207coro_call_on_destroy (pTHX_ struct coro *coro)
2208{
2209 AV *od = coro->on_destroy;
2210
2211 if (!od)
2212 return;
2213
2214 coro->on_destroy = 0;
2215 sv_2mortal ((SV *)od);
2216
2217 while (AvFILLp (od) >= 0)
2218 {
2219 SV *cb = sv_2mortal (av_pop (od));
2220
2221 /* coro hv's (and only hv's at the moment) are supported as well */
2222 if (SvSTATEhv_p (aTHX_ cb))
2223 api_ready (aTHX_ cb);
2224 else
2225 {
2226 dSP; /* don't disturb outer sp */
2227 PUSHMARK (SP);
2228
2229 if (coro->status)
2230 {
2231 PUTBACK;
2232 coro_push_av (aTHX_ coro->status, G_ARRAY);
2233 SPAGAIN;
2234 }
2235
2236 PUTBACK;
2237 call_sv (cb, G_VOID | G_DISCARD);
2238 }
2239 }
2240}
2241
2242static void
2243coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2244{
2245 AV *av;
2246
2247 if (coro->status)
2248 {
2249 av = coro->status;
2250 av_clear (av);
2251 }
2252 else
2253 av = coro->status = newAV ();
2254
2255 /* items are actually not so common, so optimise for this case */
2256 if (items)
2257 {
2258 int i;
2259
2260 av_extend (av, items - 1);
2261
2262 for (i = 0; i < items; ++i)
2263 av_push (av, SvREFCNT_inc_NN (arg [i]));
2264 }
2265}
2266
2267static void
2268slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2269{
2270 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2271 api_ready (aTHX_ sv_manager);
2272
2273 frame->prepare = prepare_schedule;
2274 frame->check = slf_check_repeat;
2275
2276 /* as a minor optimisation, we could unwind all stacks here */
2277 /* but that puts extra pressure on pp_slf, and is not worth much */
2278 /*coro_unwind_stacks (aTHX);*/
2279}
2280
2281static void
2282slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 HV *coro_hv = (HV *)SvRV (coro_current);
2285
2286 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2287 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2288}
2289
2290static void
2291slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 HV *coro_hv;
2294 struct coro *coro;
2295
2296 if (items <= 0)
2297 croak ("Coro::cancel called without coro object,");
2298
2299 coro = SvSTATE (arg [0]);
2300 coro_hv = coro->hv;
2301
2302 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2303
2304 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2305 {
2306 /* coro currently busy cancelling something, so just notify it */
2307 coro->slf_frame.data = (void *)coro;
2308
2309 frame->prepare = prepare_nop;
2310 frame->check = slf_check_nop;
2311 }
2312 else if (coro_hv == (HV *)SvRV (coro_current))
2313 {
2314 /* cancelling the current coro is allowed, and equals terminate */
2315 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2316 }
2317 else
2318 {
2319 struct coro *self = SvSTATE_current;
2320
2321 if (!self)
2322 croak ("Coro::cancel called outside of thread content,");
2323
2324 /* otherwise we cancel directly, purely for speed reasons
2325 * unfortunately, this requires some magic trickery, as
2326 * somebody else could cancel us, so we have to fight the cancellation.
2327 * this is ugly, and hopefully fully worth the extra speed.
2328 * besides, I can't get the slow-but-safe version working...
2329 */
2330 slf_frame.data = 0;
2331 self->flags |= CF_NOCANCEL;
2332 coro_state_destroy (aTHX_ coro);
2333 self->flags &= ~CF_NOCANCEL;
2334
2335 if (slf_frame.data)
2336 {
2337 /* while we were busy we have been cancelled, so terminate */
2338 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2339 }
2340 else
2341 {
2342 frame->prepare = prepare_nop;
2343 frame->check = slf_check_nop;
2344 }
2345 }
2346}
2347
2348static int
2349slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2350{
2351 frame->prepare = 0;
2352 coro_unwind_stacks (aTHX);
2353
2354 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2355
2356 return 1;
2357}
2358
2359static int
2360safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2361{
2362 if (coro->cctx)
2363 croak ("coro inside C callback, unable to cancel at this time, caught");
2364
2365 if (coro->flags & CF_NEW)
2366 {
2367 coro_set_status (aTHX_ coro, arg, items);
2368 coro_state_destroy (aTHX_ coro);
2369 }
2370 else
2371 {
2372 if (!coro->slf_frame.prepare)
2373 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2374
2375 slf_destroy (aTHX_ coro);
2376
2377 coro_set_status (aTHX_ coro, arg, items);
2378 coro->slf_frame.prepare = prepare_nop;
2379 coro->slf_frame.check = slf_check_safe_cancel;
2380
2381 api_ready (aTHX_ (SV *)coro->hv);
2382 }
2383
2384 return 1;
2385}
2386
2387/*****************************************************************************/
2388/* async pool handler */
2389
2390static int
2391slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2392{
2393 HV *hv = (HV *)SvRV (coro_current);
2394 struct coro *coro = (struct coro *)frame->data;
2395
2396 if (!coro->invoke_cb)
2397 return 1; /* loop till we have invoke */
2398 else
2399 {
2400 hv_store (hv, "desc", sizeof ("desc") - 1,
2401 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2402
2403 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2404
2405 {
2406 dSP;
2407 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2408 PUTBACK;
880 } 2409 }
881 2410
882 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2411 SvREFCNT_dec (GvAV (PL_defgv));
2412 GvAV (PL_defgv) = coro->invoke_av;
2413 coro->invoke_av = 0;
2414
2415 return 0;
2416 }
2417}
2418
2419static void
2420slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2421{
2422 HV *hv = (HV *)SvRV (coro_current);
2423 struct coro *coro = SvSTATE_hv ((SV *)hv);
2424
2425 if (ecb_expect_true (coro->saved_deffh))
2426 {
2427 /* subsequent iteration */
2428 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2429 coro->saved_deffh = 0;
2430
2431 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2432 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2433 {
2434 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2435 return;
2436 }
2437 else
2438 {
2439 av_clear (GvAV (PL_defgv));
2440 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2441
2442 if (ecb_expect_false (coro->swap_sv))
2443 {
2444 swap_svs_leave (coro);
2445 SvREFCNT_dec_NN (coro->swap_sv);
2446 coro->swap_sv = 0;
2447 }
2448
2449 coro->prio = 0;
2450
2451 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2452 api_trace (aTHX_ coro_current, 0);
2453
2454 frame->prepare = prepare_schedule;
2455 av_push (av_async_pool, SvREFCNT_inc (hv));
2456 }
2457 }
2458 else
2459 {
2460 /* first iteration, simply fall through */
2461 frame->prepare = prepare_nop;
2462 }
2463
2464 frame->check = slf_check_pool_handler;
2465 frame->data = (void *)coro;
2466}
2467
2468/*****************************************************************************/
2469/* rouse callback */
2470
2471#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2472
2473static void
2474coro_rouse_callback (pTHX_ CV *cv)
2475{
2476 dXSARGS;
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2480 {
2481 /* first call, set args */
2482 SV *coro = SvRV (data);
2483 AV *av = newAV ();
2484
2485 SvRV_set (data, (SV *)av);
2486
2487 /* better take a full copy of the arguments */
2488 while (items--)
2489 av_store (av, items, newSVsv (ST (items)));
2490
2491 api_ready (aTHX_ coro);
2492 SvREFCNT_dec (coro);
2493 }
2494
2495 XSRETURN_EMPTY;
2496}
2497
2498static int
2499slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2500{
2501 SV *data = (SV *)frame->data;
2502
2503 if (CORO_THROW)
2504 return 0;
2505
2506 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2507 return 1;
2508
2509 /* now push all results on the stack */
2510 {
2511 dSP;
2512 AV *av = (AV *)SvRV (data);
2513 int i;
2514
2515 EXTEND (SP, AvFILLp (av) + 1);
2516 for (i = 0; i <= AvFILLp (av); ++i)
2517 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2518
2519 /* we have stolen the elements, so set length to zero and free */
2520 AvFILLp (av) = -1;
2521 av_undef (av);
2522
2523 PUTBACK;
2524 }
2525
2526 return 0;
2527}
2528
2529static void
2530slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 SV *cb;
2533
2534 if (items)
2535 cb = arg [0];
2536 else
2537 {
2538 struct coro *coro = SvSTATE_current;
2539
2540 if (!coro->rouse_cb)
2541 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2542
2543 cb = sv_2mortal (coro->rouse_cb);
2544 coro->rouse_cb = 0;
2545 }
2546
2547 if (!SvROK (cb)
2548 || SvTYPE (SvRV (cb)) != SVt_PVCV
2549 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2550 croak ("Coro::rouse_wait called with illegal callback argument,");
2551
2552 {
2553 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2554 SV *data = (SV *)S_GENSUB_ARG;
2555
2556 frame->data = (void *)data;
2557 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2558 frame->check = slf_check_rouse_wait;
2559 }
883} 2560}
884 2561
885static SV * 2562static SV *
886coro_deq (pTHX_ int min_prio) 2563coro_new_rouse_cb (pTHX)
887{ 2564{
888 int prio = PRIO_MAX - PRIO_MIN; 2565 HV *hv = (HV *)SvRV (coro_current);
2566 struct coro *coro = SvSTATE_hv (hv);
2567 SV *data = newRV_inc ((SV *)hv);
2568 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
889 2569
890 min_prio -= PRIO_MIN; 2570 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
891 if (min_prio < 0) 2571 SvREFCNT_dec (data); /* magicext increases the refcount */
892 min_prio = 0;
893 2572
894 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2573 SvREFCNT_dec (coro->rouse_cb);
895 if (av_len (coro_ready[prio]) >= 0) 2574 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2575
2576 return cb;
2577}
2578
2579/*****************************************************************************/
2580/* schedule-like-function opcode (SLF) */
2581
2582static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2583static const CV *slf_cv;
2584static SV **slf_argv;
2585static int slf_argc, slf_arga; /* count, allocated */
2586static I32 slf_ax; /* top of stack, for restore */
2587
2588/* this restores the stack in the case we patched the entersub, to */
2589/* recreate the stack frame as perl will on following calls */
2590/* since entersub cleared the stack */
2591static OP *
2592pp_restore (pTHX)
2593{
2594 int i;
2595 SV **SP = PL_stack_base + slf_ax;
2596
2597 PUSHMARK (SP);
2598
2599 EXTEND (SP, slf_argc + 1);
2600
2601 for (i = 0; i < slf_argc; ++i)
2602 PUSHs (sv_2mortal (slf_argv [i]));
2603
2604 PUSHs ((SV *)CvGV (slf_cv));
2605
2606 RETURNOP (slf_restore.op_first);
2607}
2608
2609static void
2610slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2611{
2612 SV **arg = (SV **)slf_frame.data;
2613
2614 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2615}
2616
2617static void
2618slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 if (items != 2)
2621 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2622
2623 frame->prepare = slf_prepare_transfer;
2624 frame->check = slf_check_nop;
2625 frame->data = (void *)arg; /* let's hope it will stay valid */
2626}
2627
2628static void
2629slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2630{
2631 frame->prepare = prepare_schedule;
2632 frame->check = slf_check_nop;
2633}
2634
2635static void
2636slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2637{
2638 struct coro *next = (struct coro *)slf_frame.data;
2639
2640 SvREFCNT_inc_NN (next->hv);
2641 prepare_schedule_to (aTHX_ ta, next);
2642}
2643
2644static void
2645slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 if (!items)
2648 croak ("Coro::schedule_to expects a coroutine argument, caught");
2649
2650 frame->data = (void *)SvSTATE (arg [0]);
2651 frame->prepare = slf_prepare_schedule_to;
2652 frame->check = slf_check_nop;
2653}
2654
2655static void
2656slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2657{
2658 api_ready (aTHX_ SvRV (coro_current));
2659
2660 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2661}
2662
2663static void
2664slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2665{
2666 frame->prepare = prepare_cede;
2667 frame->check = slf_check_nop;
2668}
2669
2670static void
2671slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2672{
2673 frame->prepare = prepare_cede_notself;
2674 frame->check = slf_check_nop;
2675}
2676
2677/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2678static void
2679slf_destroy (pTHX_ struct coro *coro)
2680{
2681 struct CoroSLF frame = coro->slf_frame;
2682
2683 /*
2684 * The on_destroy below most likely is from an SLF call.
2685 * Since by definition the SLF call will not finish when we destroy
2686 * the coro, we will have to force-finish it here, otherwise
2687 * cleanup functions cannot call SLF functions.
2688 */
2689 coro->slf_frame.prepare = 0;
2690
2691 /* this callback is reserved for slf functions needing to do cleanup */
2692 if (frame.destroy && frame.prepare && !PL_dirty)
2693 frame.destroy (aTHX_ &frame);
2694}
2695
2696/*
2697 * these not obviously related functions are all rolled into one
2698 * function to increase chances that they all will call transfer with the same
2699 * stack offset
2700 * SLF stands for "schedule-like-function".
2701 */
2702static OP *
2703pp_slf (pTHX)
2704{
2705 I32 checkmark; /* mark SP to see how many elements check has pushed */
2706
2707 /* set up the slf frame, unless it has already been set-up */
2708 /* the latter happens when a new coro has been started */
2709 /* or when a new cctx was attached to an existing coroutine */
2710 if (ecb_expect_true (!slf_frame.prepare))
2711 {
2712 /* first iteration */
2713 dSP;
2714 SV **arg = PL_stack_base + TOPMARK + 1;
2715 int items = SP - arg; /* args without function object */
2716 SV *gv = *sp;
2717
2718 /* do a quick consistency check on the "function" object, and if it isn't */
2719 /* for us, divert to the real entersub */
2720 if (SvTYPE (gv) != SVt_PVGV
2721 || !GvCV (gv)
2722 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2723 return PL_ppaddr[OP_ENTERSUB](aTHX);
2724
2725 if (!(PL_op->op_flags & OPf_STACKED))
2726 {
2727 /* ampersand-form of call, use @_ instead of stack */
2728 AV *av = GvAV (PL_defgv);
2729 arg = AvARRAY (av);
2730 items = AvFILLp (av) + 1;
2731 }
2732
2733 /* now call the init function, which needs to set up slf_frame */
2734 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2735 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2736
2737 /* pop args */
2738 SP = PL_stack_base + POPMARK;
2739
2740 PUTBACK;
2741 }
2742
2743 /* now that we have a slf_frame, interpret it! */
2744 /* we use a callback system not to make the code needlessly */
2745 /* complicated, but so we can run multiple perl coros from one cctx */
2746
2747 do
2748 {
2749 struct coro_transfer_args ta;
2750
2751 slf_frame.prepare (aTHX_ &ta);
2752 TRANSFER (ta, 0);
2753
2754 checkmark = PL_stack_sp - PL_stack_base;
2755 }
2756 while (slf_frame.check (aTHX_ &slf_frame));
2757
2758 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2759
2760 /* exception handling */
2761 if (ecb_expect_false (CORO_THROW))
2762 {
2763 SV *exception = sv_2mortal (CORO_THROW);
2764
2765 CORO_THROW = 0;
2766 sv_setsv (ERRSV, exception);
2767 croak (0);
2768 }
2769
2770 /* return value handling - mostly like entersub */
2771 /* make sure we put something on the stack in scalar context */
2772 if (GIMME_V == G_SCALAR
2773 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2774 {
2775 dSP;
2776 SV **bot = PL_stack_base + checkmark;
2777
2778 if (sp == bot) /* too few, push undef */
2779 bot [1] = &PL_sv_undef;
2780 else /* too many, take last one */
2781 bot [1] = *sp;
2782
2783 SP = bot + 1;
2784
2785 PUTBACK;
2786 }
2787
2788 return NORMAL;
2789}
2790
2791static void
2792api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2793{
2794 int i;
2795 SV **arg = PL_stack_base + ax;
2796 int items = PL_stack_sp - arg + 1;
2797
2798 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2799
2800 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2801 && PL_op->op_ppaddr != pp_slf)
2802 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2803
2804 CvFLAGS (cv) |= CVf_SLF;
2805 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2806 slf_cv = cv;
2807
2808 /* we patch the op, and then re-run the whole call */
2809 /* we have to put the same argument on the stack for this to work */
2810 /* and this will be done by pp_restore */
2811 slf_restore.op_next = (OP *)&slf_restore;
2812 slf_restore.op_type = OP_CUSTOM;
2813 slf_restore.op_ppaddr = pp_restore;
2814 slf_restore.op_first = PL_op;
2815
2816 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2817
2818 if (PL_op->op_flags & OPf_STACKED)
2819 {
2820 if (items > slf_arga)
2821 {
2822 slf_arga = items;
2823 Safefree (slf_argv);
2824 New (0, slf_argv, slf_arga, SV *);
2825 }
2826
2827 slf_argc = items;
2828
2829 for (i = 0; i < items; ++i)
2830 slf_argv [i] = SvREFCNT_inc (arg [i]);
2831 }
2832 else
2833 slf_argc = 0;
2834
2835 PL_op->op_ppaddr = pp_slf;
2836 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2837
2838 PL_op = (OP *)&slf_restore;
2839}
2840
2841/*****************************************************************************/
2842/* dynamic wind */
2843
2844static void
2845on_enterleave_call (pTHX_ SV *cb)
2846{
2847 dSP;
2848
2849 PUSHSTACK;
2850
2851 PUSHMARK (SP);
2852 PUTBACK;
2853 call_sv (cb, G_VOID | G_DISCARD);
2854 SPAGAIN;
2855
2856 POPSTACK;
2857}
2858
2859static SV *
2860coro_avp_pop_and_free (pTHX_ AV **avp)
2861{
2862 AV *av = *avp;
2863 SV *res = av_pop (av);
2864
2865 if (AvFILLp (av) < 0)
2866 {
2867 *avp = 0;
2868 SvREFCNT_dec (av);
2869 }
2870
2871 return res;
2872}
2873
2874static void
2875coro_pop_on_enter (pTHX_ void *coro)
2876{
2877 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2878 SvREFCNT_dec (cb);
2879}
2880
2881static void
2882coro_pop_on_leave (pTHX_ void *coro)
2883{
2884 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2885 on_enterleave_call (aTHX_ sv_2mortal (cb));
2886}
2887
2888static void
2889enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2890{
2891 if (!hook)
2892 return;
2893
2894 if (!*avp)
2895 {
2896 *avp = newAV ();
2897 AvREAL_off (*avp);
2898 }
2899
2900 av_push (*avp, (SV *)hook);
2901 av_push (*avp, (SV *)arg);
2902}
2903
2904static void
2905enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2906{
2907 AV *av = *avp;
2908 int i;
2909
2910 if (!av)
2911 return;
2912
2913 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2914 if (AvARRAY (av)[i] == (SV *)hook)
896 { 2915 {
897 coro_nready--; 2916 if (execute)
898 return av_shift (coro_ready[prio]); 2917 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2918
2919 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2920 av_pop (av);
2921 av_pop (av);
2922 break;
899 } 2923 }
900 2924
2925 if (AvFILLp (av) >= 0)
2926 {
2927 *avp = 0;
2928 SvREFCNT_dec_NN (av);
2929 }
2930}
2931
2932static void
2933api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2934{
2935 struct coro *coro = SvSTATE (coro_sv);
2936
2937 if (SvSTATE_current == coro)
2938 if (enter)
2939 enter (aTHX_ enter_arg);
2940
2941 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2942 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2943}
2944
2945static void
2946api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2947{
2948 struct coro *coro = SvSTATE (coro_sv);
2949
2950 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2951 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2952}
2953
2954static void
2955savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2956{
2957 struct coro *coro = SvSTATE_current;
2958
2959 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2960}
2961
2962static void
2963savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2964{
2965 struct coro *coro = SvSTATE_current;
2966
2967 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2968}
2969
2970static void
2971api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2972{
2973 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2974
2975 /* this ought to be much cheaper than malloc + a single destructor call */
2976 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2977 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2978}
2979
2980/*****************************************************************************/
2981/* PerlIO::cede */
2982
2983typedef struct
2984{
2985 PerlIOBuf base;
2986 NV next, every;
2987} PerlIOCede;
2988
2989static IV ecb_cold
2990PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2991{
2992 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2993
2994 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2995 self->next = nvtime () + self->every;
2996
2997 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2998}
2999
3000static SV * ecb_cold
3001PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3002{
3003 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3004
3005 return newSVnv (self->every);
3006}
3007
3008static IV
3009PerlIOCede_flush (pTHX_ PerlIO *f)
3010{
3011 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3012 double now = nvtime ();
3013
3014 if (now >= self->next)
3015 {
3016 api_cede (aTHX);
3017 self->next = now + self->every;
3018 }
3019
3020 return PerlIOBuf_flush (aTHX_ f);
3021}
3022
3023static PerlIO_funcs PerlIO_cede =
3024{
3025 sizeof(PerlIO_funcs),
3026 "cede",
3027 sizeof(PerlIOCede),
3028 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3029 PerlIOCede_pushed,
3030 PerlIOBuf_popped,
3031 PerlIOBuf_open,
3032 PerlIOBase_binmode,
3033 PerlIOCede_getarg,
3034 PerlIOBase_fileno,
3035 PerlIOBuf_dup,
3036 PerlIOBuf_read,
3037 PerlIOBuf_unread,
3038 PerlIOBuf_write,
3039 PerlIOBuf_seek,
3040 PerlIOBuf_tell,
3041 PerlIOBuf_close,
3042 PerlIOCede_flush,
3043 PerlIOBuf_fill,
3044 PerlIOBase_eof,
3045 PerlIOBase_error,
3046 PerlIOBase_clearerr,
3047 PerlIOBase_setlinebuf,
3048 PerlIOBuf_get_base,
3049 PerlIOBuf_bufsiz,
3050 PerlIOBuf_get_ptr,
3051 PerlIOBuf_get_cnt,
3052 PerlIOBuf_set_ptrcnt,
3053};
3054
3055/*****************************************************************************/
3056/* Coro::Semaphore & Coro::Signal */
3057
3058static SV *
3059coro_waitarray_new (pTHX_ int count)
3060{
3061 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3062 AV *av = newAV ();
3063 SV **ary;
3064
3065 /* unfortunately, building manually saves memory */
3066 Newx (ary, 2, SV *);
3067 AvALLOC (av) = ary;
3068#if PERL_VERSION_ATLEAST (5,10,0)
3069 AvARRAY (av) = ary;
3070#else
3071 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3072 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3073 SvPVX ((SV *)av) = (char *)ary;
3074#endif
3075 AvMAX (av) = 1;
3076 AvFILLp (av) = 0;
3077 ary [0] = newSViv (count);
3078
3079 return newRV_noinc ((SV *)av);
3080}
3081
3082/* semaphore */
3083
3084static void
3085coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3086{
3087 SV *count_sv = AvARRAY (av)[0];
3088 IV count = SvIVX (count_sv);
3089
3090 count += adjust;
3091 SvIVX (count_sv) = count;
3092
3093 /* now wake up as many waiters as are expected to lock */
3094 while (count > 0 && AvFILLp (av) > 0)
3095 {
3096 SV *cb;
3097
3098 /* swap first two elements so we can shift a waiter */
3099 AvARRAY (av)[0] = AvARRAY (av)[1];
3100 AvARRAY (av)[1] = count_sv;
3101 cb = av_shift (av);
3102
3103 if (SvOBJECT (cb))
3104 {
3105 api_ready (aTHX_ cb);
3106 --count;
3107 }
3108 else if (SvTYPE (cb) == SVt_PVCV)
3109 {
3110 dSP;
3111 PUSHMARK (SP);
3112 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3113 PUTBACK;
3114 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3115 }
3116
3117 SvREFCNT_dec_NN (cb);
3118 }
3119}
3120
3121static void
3122coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3123{
3124 /* call $sem->adjust (0) to possibly wake up some other waiters */
3125 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3126}
3127
3128static int
3129slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3130{
3131 AV *av = (AV *)frame->data;
3132 SV *count_sv = AvARRAY (av)[0];
3133 SV *coro_hv = SvRV (coro_current);
3134
3135 frame->destroy = 0;
3136
3137 /* if we are about to throw, don't actually acquire the lock, just throw */
3138 if (ecb_expect_false (CORO_THROW))
3139 {
3140 /* we still might be responsible for the semaphore, so wake up others */
3141 coro_semaphore_adjust (aTHX_ av, 0);
3142
3143 return 0;
3144 }
3145 else if (SvIVX (count_sv) > 0)
3146 {
3147 if (acquire)
3148 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3149 else
3150 coro_semaphore_adjust (aTHX_ av, 0);
3151
3152 return 0;
3153 }
3154 else
3155 {
3156 int i;
3157 /* if we were woken up but can't down, we look through the whole */
3158 /* waiters list and only add us if we aren't in there already */
3159 /* this avoids some degenerate memory usage cases */
3160 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3161 if (AvARRAY (av)[i] == coro_hv)
3162 return 1;
3163
3164 av_push (av, SvREFCNT_inc (coro_hv));
3165 return 1;
3166 }
3167}
3168
3169static int
3170slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3173}
3174
3175static int
3176slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3177{
3178 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3179}
3180
3181static void
3182slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3183{
3184 AV *av = (AV *)SvRV (arg [0]);
3185
3186 if (SvIVX (AvARRAY (av)[0]) > 0)
3187 {
3188 frame->data = (void *)av;
3189 frame->prepare = prepare_nop;
3190 }
3191 else
3192 {
3193 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3194
3195 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3196 frame->prepare = prepare_schedule;
3197 /* to avoid race conditions when a woken-up coro gets terminated */
3198 /* we arrange for a temporary on_destroy that calls adjust (0) */
3199 frame->destroy = coro_semaphore_destroy;
3200 }
3201}
3202
3203static void
3204slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3205{
3206 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3207 frame->check = slf_check_semaphore_down;
3208}
3209
3210static void
3211slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3212{
3213 if (items >= 2)
3214 {
3215 /* callback form */
3216 AV *av = (AV *)SvRV (arg [0]);
3217 SV *cb_cv = s_get_cv_croak (arg [1]);
3218
3219 av_push (av, SvREFCNT_inc_NN (cb_cv));
3220
3221 if (SvIVX (AvARRAY (av)[0]) > 0)
3222 coro_semaphore_adjust (aTHX_ av, 0);
3223
3224 frame->prepare = prepare_nop;
3225 frame->check = slf_check_nop;
3226 }
3227 else
3228 {
3229 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3230 frame->check = slf_check_semaphore_wait;
3231 }
3232}
3233
3234/* signal */
3235
3236static void
3237coro_signal_wake (pTHX_ AV *av, int count)
3238{
3239 SvIVX (AvARRAY (av)[0]) = 0;
3240
3241 /* now signal count waiters */
3242 while (count > 0 && AvFILLp (av) > 0)
3243 {
3244 SV *cb;
3245
3246 /* swap first two elements so we can shift a waiter */
3247 cb = AvARRAY (av)[0];
3248 AvARRAY (av)[0] = AvARRAY (av)[1];
3249 AvARRAY (av)[1] = cb;
3250
3251 cb = av_shift (av);
3252
3253 if (SvTYPE (cb) == SVt_PVCV)
3254 {
3255 dSP;
3256 PUSHMARK (SP);
3257 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3258 PUTBACK;
3259 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3260 }
3261 else
3262 {
3263 api_ready (aTHX_ cb);
3264 sv_setiv (cb, 0); /* signal waiter */
3265 }
3266
3267 SvREFCNT_dec_NN (cb);
3268
3269 --count;
3270 }
3271}
3272
3273static int
3274slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3275{
3276 /* if we are about to throw, also stop waiting */
3277 return SvROK ((SV *)frame->data) && !CORO_THROW;
3278}
3279
3280static void
3281slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3282{
3283 AV *av = (AV *)SvRV (arg [0]);
3284
3285 if (items >= 2)
3286 {
3287 SV *cb_cv = s_get_cv_croak (arg [1]);
3288 av_push (av, SvREFCNT_inc_NN (cb_cv));
3289
3290 if (SvIVX (AvARRAY (av)[0]))
3291 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3292
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else if (SvIVX (AvARRAY (av)[0]))
3297 {
3298 SvIVX (AvARRAY (av)[0]) = 0;
3299 frame->prepare = prepare_nop;
3300 frame->check = slf_check_nop;
3301 }
3302 else
3303 {
3304 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3305
3306 av_push (av, waiter);
3307
3308 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3309 frame->prepare = prepare_schedule;
3310 frame->check = slf_check_signal_wait;
3311 }
3312}
3313
3314/*****************************************************************************/
3315/* Coro::AIO */
3316
3317#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3318
3319/* helper storage struct */
3320struct io_state
3321{
3322 int errorno;
3323 I32 laststype; /* U16 in 5.10.0 */
3324 int laststatval;
3325 Stat_t statcache;
3326};
3327
3328static void
3329coro_aio_callback (pTHX_ CV *cv)
3330{
3331 dXSARGS;
3332 AV *state = (AV *)S_GENSUB_ARG;
3333 SV *coro = av_pop (state);
3334 SV *data_sv = newSV (sizeof (struct io_state));
3335
3336 av_extend (state, items - 1);
3337
3338 sv_upgrade (data_sv, SVt_PV);
3339 SvCUR_set (data_sv, sizeof (struct io_state));
3340 SvPOK_only (data_sv);
3341
3342 {
3343 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3344
3345 data->errorno = errno;
3346 data->laststype = PL_laststype;
3347 data->laststatval = PL_laststatval;
3348 data->statcache = PL_statcache;
3349 }
3350
3351 /* now build the result vector out of all the parameters and the data_sv */
3352 {
3353 int i;
3354
3355 for (i = 0; i < items; ++i)
3356 av_push (state, SvREFCNT_inc_NN (ST (i)));
3357 }
3358
3359 av_push (state, data_sv);
3360
3361 api_ready (aTHX_ coro);
3362 SvREFCNT_dec_NN (coro);
3363 SvREFCNT_dec_NN ((AV *)state);
3364}
3365
3366static int
3367slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3368{
3369 AV *state = (AV *)frame->data;
3370
3371 /* if we are about to throw, return early */
3372 /* this does not cancel the aio request, but at least */
3373 /* it quickly returns */
3374 if (CORO_THROW)
3375 return 0;
3376
3377 /* one element that is an RV? repeat! */
3378 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3379 return 1;
3380
3381 /* restore status */
3382 {
3383 SV *data_sv = av_pop (state);
3384 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3385
3386 errno = data->errorno;
3387 PL_laststype = data->laststype;
3388 PL_laststatval = data->laststatval;
3389 PL_statcache = data->statcache;
3390
3391 SvREFCNT_dec_NN (data_sv);
3392 }
3393
3394 /* push result values */
3395 {
3396 dSP;
3397 int i;
3398
3399 EXTEND (SP, AvFILLp (state) + 1);
3400 for (i = 0; i <= AvFILLp (state); ++i)
3401 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3402
3403 PUTBACK;
3404 }
3405
901 return 0; 3406 return 0;
902} 3407}
903 3408
904static void 3409static void
905api_ready (SV *coro) 3410slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
906{ 3411{
907 dTHX; 3412 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
908
909 if (SvROK (coro))
910 coro = SvRV (coro);
911
912 LOCK;
913 coro_enq (aTHX_ SvREFCNT_inc (coro));
914 UNLOCK;
915}
916
917static void
918api_schedule (void)
919{
920 dTHX;
921
922 SV *prev, *next;
923
924 LOCK;
925
926 prev = SvRV (GvSV (coro_current)); 3413 SV *coro_hv = SvRV (coro_current);
927 next = coro_deq (aTHX_ PRIO_MIN); 3414 struct coro *coro = SvSTATE_hv (coro_hv);
928 3415
929 if (!next) 3416 /* put our coroutine id on the state arg */
930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3417 av_push (state, SvREFCNT_inc_NN (coro_hv));
931 3418
932 /* free this only after the transfer */ 3419 /* first see whether we have a non-zero priority and set it as AIO prio */
933 coro_mortal = prev; 3420 if (coro->prio)
934 SV_CORO (prev, "Coro::schedule"); 3421 {
3422 dSP;
935 3423
936 SvRV (GvSV (coro_current)) = next; 3424 static SV *prio_cv;
3425 static SV *prio_sv;
937 3426
938 SV_CORO (next, "Coro::schedule"); 3427 if (ecb_expect_false (!prio_cv))
3428 {
3429 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3430 prio_sv = newSViv (0);
3431 }
939 3432
940 UNLOCK; 3433 PUSHMARK (SP);
3434 sv_setiv (prio_sv, coro->prio);
3435 XPUSHs (prio_sv);
941 3436
942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3437 PUTBACK;
943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3438 call_sv (prio_cv, G_VOID | G_DISCARD);
944} 3439 }
945 3440
946static void 3441 /* now call the original request */
947api_cede (void) 3442 {
948{ 3443 dSP;
949 dTHX; 3444 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3445 int i;
950 3446
951 LOCK; 3447 PUSHMARK (SP);
952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
953 UNLOCK;
954 3448
955 api_schedule (); 3449 /* first push all args to the stack */
956} 3450 EXTEND (SP, items + 1);
957 3451
3452 for (i = 0; i < items; ++i)
3453 PUSHs (arg [i]);
3454
3455 /* now push the callback closure */
3456 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3457
3458 /* now call the AIO function - we assume our request is uncancelable */
3459 PUTBACK;
3460 call_sv ((SV *)req, G_VOID | G_DISCARD);
3461 }
3462
3463 /* now that the request is going, we loop till we have a result */
3464 frame->data = (void *)state;
3465 frame->prepare = prepare_schedule;
3466 frame->check = slf_check_aio_req;
3467}
3468
3469static void
3470coro_aio_req_xs (pTHX_ CV *cv)
3471{
3472 dXSARGS;
3473
3474 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3475
3476 XSRETURN_EMPTY;
3477}
3478
3479/*****************************************************************************/
3480
3481#if CORO_CLONE
3482# include "clone.c"
3483#endif
3484
3485/*****************************************************************************/
3486
3487static SV *
3488coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3489{
3490 SV *coro_sv;
3491 struct coro *coro;
3492 MAGIC *mg;
3493 HV *hv;
3494 SV *cb;
3495 int i;
3496
3497 if (argc > 0)
3498 {
3499 cb = s_get_cv_croak (argv [0]);
3500
3501 if (!is_coro)
3502 {
3503 if (CvISXSUB (cb))
3504 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3505
3506 if (!CvROOT (cb))
3507 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3508 }
3509 }
3510
3511 Newz (0, coro, 1, struct coro);
3512 coro->args = newAV ();
3513 coro->flags = CF_NEW;
3514
3515 if (coro_first) coro_first->prev = coro;
3516 coro->next = coro_first;
3517 coro_first = coro;
3518
3519 coro->hv = hv = newHV ();
3520 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3521 mg->mg_flags |= MGf_DUP;
3522 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3523
3524 if (argc > 0)
3525 {
3526 av_extend (coro->args, argc + is_coro - 1);
3527
3528 if (is_coro)
3529 {
3530 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3531 cb = (SV *)cv_coro_run;
3532 }
3533
3534 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3535
3536 for (i = 1; i < argc; i++)
3537 av_push (coro->args, newSVsv (argv [i]));
3538 }
3539
3540 return coro_sv;
3541}
3542
3543#ifndef __cplusplus
3544ecb_cold XS(boot_Coro__State);
3545#endif
3546
3547#if CORO_JIT
3548
3549static void ecb_noinline ecb_cold
3550pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3551{
3552 dSP;
3553 AV *av = newAV ();
3554
3555 av_store (av, 3, newSVuv (d));
3556 av_store (av, 2, newSVuv (c));
3557 av_store (av, 1, newSVuv (b));
3558 av_store (av, 0, newSVuv (a));
3559
3560 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3561
3562 PUTBACK;
3563}
3564
3565static void ecb_noinline ecb_cold
3566jit_init (pTHX)
3567{
3568 dSP;
3569 SV *load, *save;
3570 char *map_base;
3571 char *load_ptr, *save_ptr;
3572 STRLEN load_len, save_len, map_len;
3573 int count;
3574
3575 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3576
3577 PUSHMARK (SP);
3578 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3579 #include "state.h"
3580 count = call_pv ("Coro::State::_jit", G_ARRAY);
3581 SPAGAIN;
3582
3583 save = POPs; save_ptr = SvPVbyte (save, save_len);
3584 load = POPs; load_ptr = SvPVbyte (load, load_len);
3585
3586 map_len = load_len + save_len + 16;
3587
3588 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3589
3590 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3591
3592 load_perl_slots = (load_save_perl_slots_type)map_base;
3593 memcpy (map_base, load_ptr, load_len);
3594
3595 map_base += (load_len + 15) & ~15;
3596
3597 save_perl_slots = (load_save_perl_slots_type)map_base;
3598 memcpy (map_base, save_ptr, save_len);
3599
3600 /* we are good citizens and try to make the page read-only, so the evil evil */
3601 /* hackers might have it a bit more difficult */
3602 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3603
3604 PUTBACK;
3605 eval_pv ("undef &Coro::State::_jit", 1);
3606}
3607
3608#endif
3609
958MODULE = Coro::State PACKAGE = Coro::State 3610MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
959 3611
960PROTOTYPES: ENABLE 3612PROTOTYPES: DISABLE
961 3613
962BOOT: 3614BOOT:
963{ /* {} necessary for stoopid perl-5.6.x */ 3615{
3616#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3617#include "state.h"
964#ifdef USE_ITHREADS 3618#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex); 3619# if CORO_PTHREAD
3620 coro_thx = PERL_GET_CONTEXT;
966#endif 3621# endif
3622#endif
3623 /* perl defines these to check for existance first, but why it doesn't */
3624 /* just create them one at init time is not clear to me, except for */
3625 /* programs trying to delete them, but... */
3626 /* anyway, we declare this as invalid and make sure they are initialised here */
3627 DEFSV;
3628 ERRSV;
967 3629
968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3630 cctx_current = cctx_new_empty ();
969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3631
3632 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3633 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3634
3635 {
3636 /*
3637 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3638 * by coro_sig_vtbl in hash values.
3639 */
3640 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3641
3642 /* this only works if perl doesn't have a vtbl for %SIG */
3643 assert (!mg->mg_virtual);
3644
3645 /*
3646 * The irony is that the perl API itself asserts that mg_virtual
3647 * must be non-const, yet perl5porters insisted on marking their
3648 * vtbls as read-only, just to thwart perl modules from patching
3649 * them.
3650 */
3651 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3652 mg->mg_flags |= MGf_COPY;
3653
3654 coro_sigelem_vtbl = PL_vtbl_sigelem;
3655 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3656 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3657 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3658 }
3659
3660 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3661 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3662
970 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3663 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971 3664
972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3665 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3666 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3667 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3668 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976 3669
977 main_mainstack = PL_mainstack; 3670 main_mainstack = PL_mainstack;
3671 main_top_env = PL_top_env;
978 3672
3673 while (main_top_env->je_prev)
3674 main_top_env = main_top_env->je_prev;
3675
3676 {
3677 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3678
3679 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3680 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3681
3682 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3683 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3684 }
3685
979 coroapi.ver = CORO_API_VERSION; 3686 coroapi.ver = CORO_API_VERSION;
3687 coroapi.rev = CORO_API_REVISION;
3688
980 coroapi.transfer = api_transfer; 3689 coroapi.transfer = api_transfer;
981}
982 3690
983Coro::State 3691 coroapi.sv_state = SvSTATE_;
984_newprocess(args) 3692 coroapi.execute_slf = api_execute_slf;
985 SV * args 3693 coroapi.prepare_nop = prepare_nop;
3694 coroapi.prepare_schedule = prepare_schedule;
3695 coroapi.prepare_cede = prepare_cede;
3696 coroapi.prepare_cede_notself = prepare_cede_notself;
3697
3698 time_init (aTHX);
3699
3700 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3701#if CORO_JIT
3702 PUTBACK;
3703 jit_init (aTHX);
3704 SPAGAIN;
3705#endif
3706}
3707
3708SV *
3709new (SV *klass, ...)
3710 ALIAS:
3711 Coro::new = 1
3712 CODE:
3713 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3714 OUTPUT:
3715 RETVAL
3716
3717void
3718transfer (...)
3719 PROTOTYPE: $$
3720 CODE:
3721 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3722
3723SV *
3724clone (Coro::State coro)
3725 CODE:
3726{
3727#if CORO_CLONE
3728 struct coro *ncoro = coro_clone (aTHX_ coro);
3729 MAGIC *mg;
3730 /* TODO: too much duplication */
3731 ncoro->hv = newHV ();
3732 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3733 mg->mg_flags |= MGf_DUP;
3734 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3735#else
3736 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3737#endif
3738}
3739 OUTPUT:
3740 RETVAL
3741
3742int
3743cctx_stacksize (int new_stacksize = 0)
3744 PROTOTYPE: ;$
3745 CODE:
3746 RETVAL = cctx_stacksize;
3747 if (new_stacksize)
3748 {
3749 cctx_stacksize = new_stacksize;
3750 ++cctx_gen;
3751 }
3752 OUTPUT:
3753 RETVAL
3754
3755int
3756cctx_max_idle (int max_idle = 0)
3757 PROTOTYPE: ;$
3758 CODE:
3759 RETVAL = cctx_max_idle;
3760 if (max_idle > 1)
3761 cctx_max_idle = max_idle;
3762 OUTPUT:
3763 RETVAL
3764
3765int
3766cctx_count ()
3767 PROTOTYPE:
3768 CODE:
3769 RETVAL = cctx_count;
3770 OUTPUT:
3771 RETVAL
3772
3773int
3774cctx_idle ()
3775 PROTOTYPE:
3776 CODE:
3777 RETVAL = cctx_idle;
3778 OUTPUT:
3779 RETVAL
3780
3781void
3782list ()
3783 PROTOTYPE:
3784 PPCODE:
3785{
3786 struct coro *coro;
3787 for (coro = coro_first; coro; coro = coro->next)
3788 if (coro->hv)
3789 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3790}
3791
3792void
3793call (Coro::State coro, SV *coderef)
3794 ALIAS:
3795 eval = 1
3796 CODE:
3797{
3798 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3799 {
3800 struct coro *current = SvSTATE_current;
3801 struct CoroSLF slf_save;
3802
3803 if (current != coro)
3804 {
3805 PUTBACK;
3806 save_perl (aTHX_ current);
3807 load_perl (aTHX_ coro);
3808 /* the coro is most likely in an active SLF call.
3809 * while not strictly required (the code we execute is
3810 * not allowed to call any SLF functions), it's cleaner
3811 * to reinitialise the slf_frame and restore it later.
3812 * This might one day allow us to actually do SLF calls
3813 * from code executed here.
3814 */
3815 slf_save = slf_frame;
3816 slf_frame.prepare = 0;
3817 SPAGAIN;
3818 }
3819
3820 PUSHSTACK;
3821
3822 PUSHMARK (SP);
3823 PUTBACK;
3824
3825 if (ix)
3826 eval_sv (coderef, 0);
3827 else
3828 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3829
3830 POPSTACK;
3831 SPAGAIN;
3832
3833 if (current != coro)
3834 {
3835 PUTBACK;
3836 slf_frame = slf_save;
3837 save_perl (aTHX_ coro);
3838 load_perl (aTHX_ current);
3839 SPAGAIN;
3840 }
3841 }
3842}
3843
3844SV *
3845is_ready (Coro::State coro)
986 PROTOTYPE: $ 3846 PROTOTYPE: $
3847 ALIAS:
3848 is_ready = CF_READY
3849 is_running = CF_RUNNING
3850 is_new = CF_NEW
3851 is_destroyed = CF_ZOMBIE
3852 is_zombie = CF_ZOMBIE
3853 is_suspended = CF_SUSPENDED
3854 CODE:
3855 RETVAL = boolSV (coro->flags & ix);
3856 OUTPUT:
3857 RETVAL
3858
3859void
3860throw (SV *self, SV *exception = &PL_sv_undef)
3861 PROTOTYPE: $;$
987 CODE: 3862 CODE:
988 Coro__State coro; 3863{
3864 struct coro *coro = SvSTATE (self);
3865 struct coro *current = SvSTATE_current;
3866 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3867 SvREFCNT_dec (*exceptionp);
3868 SvGETMAGIC (exception);
3869 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
989 3870
990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3871 api_ready (aTHX_ self);
991 croak ("Coro::State::_newprocess expects an arrayref"); 3872}
3873
3874void
3875api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3876 PROTOTYPE: $;$
3877 C_ARGS: aTHX_ coro, flags
3878
3879SV *
3880has_cctx (Coro::State coro)
3881 PROTOTYPE: $
3882 CODE:
3883 /* maybe manage the running flag differently */
3884 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3885 OUTPUT:
3886 RETVAL
3887
3888int
3889is_traced (Coro::State coro)
3890 PROTOTYPE: $
3891 CODE:
3892 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3893 OUTPUT:
3894 RETVAL
3895
3896UV
3897rss (Coro::State coro)
3898 PROTOTYPE: $
3899 ALIAS:
3900 usecount = 1
3901 CODE:
3902 switch (ix)
3903 {
3904 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3905 case 1: RETVAL = coro->usecount; break;
992 3906 }
993 Newz (0, coro, 1, struct coro); 3907 OUTPUT:
994
995 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
996 /*coro->mainstack = 0; *//*actual work is done inside transfer */
997 /*coro->stack = 0;*/
998
999 /* same as JMPENV_BOOTSTRAP */
1000 /* we might be able to recycle start_env, but safe is safe */
1001 /*Zero(&coro->start_env, 1, JMPENV);*/
1002 coro->start_env.je_ret = -1;
1003 coro->start_env.je_mustcatch = TRUE;
1004
1005 RETVAL = coro; 3908 RETVAL
3909
3910void
3911force_cctx ()
3912 PROTOTYPE:
3913 CODE:
3914 cctx_current->idle_sp = 0;
3915
3916void
3917swap_defsv (Coro::State self)
3918 PROTOTYPE: $
3919 ALIAS:
3920 swap_defav = 1
3921 CODE:
3922 if (!self->slot)
3923 croak ("cannot swap state with coroutine that has no saved state,");
3924 else
3925 {
3926 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3927 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3928
3929 SV *tmp = *src; *src = *dst; *dst = tmp;
3930 }
3931
3932void
3933cancel (Coro::State self)
3934 CODE:
3935 coro_state_destroy (aTHX_ self);
3936
3937SV *
3938enable_times (int enabled = enable_times)
3939 CODE:
3940{
3941 RETVAL = boolSV (enable_times);
3942
3943 if (enabled != enable_times)
3944 {
3945 enable_times = enabled;
3946
3947 coro_times_update ();
3948 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3949 }
3950}
1006 OUTPUT: 3951 OUTPUT:
1007 RETVAL 3952 RETVAL
1008 3953
1009void 3954void
1010transfer(prev, next, flags) 3955times (Coro::State self)
1011 SV *prev 3956 PPCODE:
1012 SV *next 3957{
1013 int flags 3958 struct coro *current = SvSTATE (coro_current);
1014 PROTOTYPE: @ 3959
3960 if (ecb_expect_false (current == self))
3961 {
3962 coro_times_update ();
3963 coro_times_add (SvSTATE (coro_current));
3964 }
3965
3966 EXTEND (SP, 2);
3967 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3968 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3969
3970 if (ecb_expect_false (current == self))
3971 coro_times_sub (SvSTATE (coro_current));
3972}
3973
3974void
3975swap_sv (Coro::State coro, SV *sva, SV *svb)
3976 CODE:
3977{
3978 struct coro *current = SvSTATE_current;
3979 AV *swap_sv;
3980 int i;
3981
3982 sva = SvRV (sva);
3983 svb = SvRV (svb);
3984
3985 if (current == coro)
3986 SWAP_SVS_LEAVE (current);
3987
3988 if (!coro->swap_sv)
3989 coro->swap_sv = newAV ();
3990
3991 swap_sv = coro->swap_sv;
3992
3993 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3994 {
3995 SV *a = AvARRAY (swap_sv)[i ];
3996 SV *b = AvARRAY (swap_sv)[i + 1];
3997
3998 if (a == sva && b == svb)
3999 {
4000 SvREFCNT_dec_NN (a);
4001 SvREFCNT_dec_NN (b);
4002
4003 for (; i <= AvFILLp (swap_sv) - 2; i++)
4004 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4005
4006 AvFILLp (swap_sv) -= 2;
4007
4008 goto removed;
4009 }
4010 }
4011
4012 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4013 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4014
4015 removed:
4016
4017 if (current == coro)
4018 SWAP_SVS_ENTER (current);
4019}
4020
4021
4022MODULE = Coro::State PACKAGE = Coro
4023
4024BOOT:
4025{
4026 if (SVt_LAST > 32)
4027 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
4028
4029 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4030 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4031 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4032 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4033 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4034 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4035 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4036 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4037
4038 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4039 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4040 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4041 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4042
4043 coro_stash = gv_stashpv ("Coro", TRUE);
4044
4045 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4046 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4047 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4048 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4049 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4050 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4051
4052 {
4053 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4054
4055 coroapi.schedule = api_schedule;
4056 coroapi.schedule_to = api_schedule_to;
4057 coroapi.cede = api_cede;
4058 coroapi.cede_notself = api_cede_notself;
4059 coroapi.ready = api_ready;
4060 coroapi.is_ready = api_is_ready;
4061 coroapi.nready = coro_nready;
4062 coroapi.current = coro_current;
4063
4064 coroapi.enterleave_hook = api_enterleave_hook;
4065 coroapi.enterleave_unhook = api_enterleave_unhook;
4066 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4067
4068 /*GCoroAPI = &coroapi;*/
4069 sv_setiv (sv, (IV)&coroapi);
4070 SvREADONLY_on (sv);
4071 }
4072}
4073
4074SV *
4075async (...)
4076 PROTOTYPE: &@
1015 CODE: 4077 CODE:
1016 PUTBACK; 4078 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1017 SV_CORO (next, "Coro::transfer"); 4079 api_ready (aTHX_ RETVAL);
1018 SV_CORO (prev, "Coro::transfer"); 4080 OUTPUT:
1019 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 4081 RETVAL
1020 SPAGAIN;
1021 4082
1022void 4083void
1023DESTROY(coro) 4084_destroy (Coro::State coro)
1024 Coro::State coro 4085 CODE:
1025 CODE: 4086 /* used by the manager thread */
1026 4087 coro_state_destroy (aTHX_ coro);
1027 if (coro->mainstack && coro->mainstack != main_mainstack)
1028 {
1029 struct coro temp;
1030
1031 PUTBACK;
1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1033 LOAD (aTHX_ coro);
1034 SPAGAIN;
1035
1036 destroy_stacks (aTHX);
1037
1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039 SPAGAIN;
1040
1041 coro->mainstack = 0;
1042 }
1043
1044 deallocate_stack (coro);
1045 SvREFCNT_dec (coro->args);
1046 Safefree (coro);
1047 4088
1048void 4089void
1049_exit(code) 4090on_destroy (Coro::State coro, SV *cb)
1050 int code 4091 CODE:
4092 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4093
4094void
4095join (...)
4096 CODE:
4097 CORO_EXECUTE_SLF_XS (slf_init_join);
4098
4099void
4100terminate (...)
4101 CODE:
4102 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4103
4104void
4105cancel (...)
4106 CODE:
4107 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4108
4109int
4110safe_cancel (Coro::State self, ...)
4111 C_ARGS: aTHX_ self, &ST (1), items - 1
4112
4113void
4114schedule (...)
4115 CODE:
4116 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4117
4118void
4119schedule_to (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4122
4123void
4124cede_to (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4127
4128void
4129cede (...)
4130 CODE:
4131 CORO_EXECUTE_SLF_XS (slf_init_cede);
4132
4133void
4134cede_notself (...)
4135 CODE:
4136 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4137
4138void
4139_set_current (SV *current)
1051 PROTOTYPE: $ 4140 PROTOTYPE: $
1052 CODE: 4141 CODE:
1053 _exit (code); 4142 SvREFCNT_dec_NN (SvRV (coro_current));
1054 4143 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1055MODULE = Coro::State PACKAGE = Coro::Cont
1056
1057# this is slightly dirty (should expose a c-level api)
1058 4144
1059void 4145void
1060yield(...) 4146_set_readyhook (SV *hook)
1061 PROTOTYPE: @ 4147 PROTOTYPE: $
1062 CODE: 4148 CODE:
1063 SV *yieldstack;
1064 SV *sv;
1065 AV *defav = GvAV (PL_defgv);
1066 struct coro *prev, *next;
1067
1068 yieldstack = *hv_fetch (
1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0
1072 );
1073
1074 /* set up @_ -- ugly */
1075 av_clear (defav);
1076 av_fill (defav, items - 1);
1077 while (items--)
1078 av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080 sv = av_pop ((AV *)SvRV (yieldstack));
1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083 SvREFCNT_dec (sv); 4149 SvREFCNT_dec (coro_readyhook);
1084 4150 SvGETMAGIC (hook);
1085 transfer (aTHX_ prev, next, 0); 4151 if (SvOK (hook))
1086 4152 {
1087MODULE = Coro::State PACKAGE = Coro
1088
1089# this is slightly dirty (should expose a c-level api)
1090
1091BOOT:
1092{
1093 int i;
1094 HV *stash = gv_stashpv ("Coro", TRUE);
1095
1096 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102
1103 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1104 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1105
1106 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107 coro_ready[i] = newAV (); 4153 coro_readyhook = newSVsv (hook);
1108 4154 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1109 {
1110 SV *sv = perl_get_sv("Coro::API", 1);
1111
1112 coroapi.schedule = api_schedule;
1113 coroapi.cede = api_cede;
1114 coroapi.ready = api_ready;
1115 coroapi.nready = &coro_nready;
1116 coroapi.current = coro_current;
1117
1118 GCoroAPI = &coroapi;
1119 sv_setiv(sv, (IV)&coroapi);
1120 SvREADONLY_on(sv);
1121 } 4155 }
1122} 4156 else
4157 {
4158 coro_readyhook = 0;
4159 CORO_READYHOOK = 0;
4160 }
1123 4161
1124#if !PERL_MICRO 4162int
4163prio (Coro::State coro, int newprio = 0)
4164 PROTOTYPE: $;$
4165 ALIAS:
4166 nice = 1
4167 CODE:
4168{
4169 RETVAL = coro->prio;
1125 4170
1126void 4171 if (items > 1)
4172 {
4173 if (ix)
4174 newprio = coro->prio - newprio;
4175
4176 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4177 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4178
4179 coro->prio = newprio;
4180 }
4181}
4182 OUTPUT:
4183 RETVAL
4184
4185SV *
1127ready(self) 4186ready (SV *self)
1128 SV * self
1129 PROTOTYPE: $ 4187 PROTOTYPE: $
1130 CODE: 4188 CODE:
1131 api_ready (self); 4189 RETVAL = boolSV (api_ready (aTHX_ self));
1132 4190 OUTPUT:
1133#endif 4191 RETVAL
1134 4192
1135int 4193int
1136nready(...) 4194nready (...)
1137 PROTOTYPE: 4195 PROTOTYPE:
1138 CODE: 4196 CODE:
1139 RETVAL = coro_nready; 4197 RETVAL = coro_nready;
1140 OUTPUT: 4198 OUTPUT:
1141 RETVAL 4199 RETVAL
1142 4200
1143void 4201void
1144schedule(...) 4202suspend (Coro::State self)
1145 PROTOTYPE: 4203 PROTOTYPE: $
1146 CODE: 4204 CODE:
1147 api_schedule (); 4205 self->flags |= CF_SUSPENDED;
1148 4206
1149void 4207void
1150cede(...) 4208resume (Coro::State self)
1151 PROTOTYPE: 4209 PROTOTYPE: $
1152 CODE: 4210 CODE:
4211 self->flags &= ~CF_SUSPENDED;
4212
4213void
4214_pool_handler (...)
4215 CODE:
4216 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4217
4218void
4219async_pool (SV *cv, ...)
4220 PROTOTYPE: &@
4221 PPCODE:
4222{
4223 HV *hv = (HV *)av_pop (av_async_pool);
4224 AV *av = newAV ();
4225 SV *cb = ST (0);
4226 int i;
4227
4228 av_extend (av, items - 2);
4229 for (i = 1; i < items; ++i)
4230 av_push (av, SvREFCNT_inc_NN (ST (i)));
4231
4232 if ((SV *)hv == &PL_sv_undef)
4233 {
4234 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4235 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4236 SvREFCNT_dec_NN (sv);
4237 }
4238
4239 {
4240 struct coro *coro = SvSTATE_hv (hv);
4241
4242 assert (!coro->invoke_cb);
4243 assert (!coro->invoke_av);
4244 coro->invoke_cb = SvREFCNT_inc (cb);
4245 coro->invoke_av = av;
4246 }
4247
4248 api_ready (aTHX_ (SV *)hv);
4249
4250 if (GIMME_V != G_VOID)
4251 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4252 else
4253 SvREFCNT_dec_NN (hv);
4254}
4255
4256SV *
4257rouse_cb ()
4258 PROTOTYPE:
4259 CODE:
4260 RETVAL = coro_new_rouse_cb (aTHX);
4261 OUTPUT:
4262 RETVAL
4263
4264void
4265rouse_wait (...)
4266 PROTOTYPE: ;$
4267 PPCODE:
4268 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4269
4270void
4271on_enter (SV *block)
4272 ALIAS:
4273 on_leave = 1
4274 PROTOTYPE: &
4275 CODE:
4276{
4277 struct coro *coro = SvSTATE_current;
4278 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4279
4280 block = s_get_cv_croak (block);
4281
4282 if (!*avp)
4283 *avp = newAV ();
4284
4285 av_push (*avp, SvREFCNT_inc (block));
4286
4287 if (!ix)
4288 on_enterleave_call (aTHX_ block);
4289
4290 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4291 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4292 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4293}
4294
4295
4296MODULE = Coro::State PACKAGE = PerlIO::cede
4297
4298BOOT:
4299 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4300
4301
4302MODULE = Coro::State PACKAGE = Coro::Semaphore
4303
4304SV *
4305new (SV *klass, SV *count = 0)
4306 CODE:
4307{
4308 int semcnt = 1;
4309
4310 if (count)
4311 {
4312 SvGETMAGIC (count);
4313
4314 if (SvOK (count))
4315 semcnt = SvIV (count);
4316 }
4317
4318 RETVAL = sv_bless (
4319 coro_waitarray_new (aTHX_ semcnt),
4320 GvSTASH (CvGV (cv))
4321 );
4322}
4323 OUTPUT:
4324 RETVAL
4325
4326# helper for Coro::Channel and others
4327SV *
4328_alloc (int count)
4329 CODE:
4330 RETVAL = coro_waitarray_new (aTHX_ count);
4331 OUTPUT:
4332 RETVAL
4333
4334SV *
4335count (SV *self)
4336 CODE:
4337 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4338 OUTPUT:
4339 RETVAL
4340
4341void
4342up (SV *self)
4343 CODE:
4344 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4345
4346void
4347adjust (SV *self, int adjust)
4348 CODE:
4349 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4350
4351void
4352down (...)
4353 CODE:
4354 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4355
4356void
4357wait (...)
4358 CODE:
4359 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4360
4361void
4362try (SV *self)
4363 PPCODE:
4364{
4365 AV *av = (AV *)SvRV (self);
4366 SV *count_sv = AvARRAY (av)[0];
4367 IV count = SvIVX (count_sv);
4368
4369 if (count > 0)
4370 {
4371 --count;
4372 SvIVX (count_sv) = count;
4373 XSRETURN_YES;
4374 }
4375 else
4376 XSRETURN_NO;
4377}
4378
4379void
4380waiters (SV *self)
4381 PPCODE:
4382{
4383 AV *av = (AV *)SvRV (self);
4384 int wcount = AvFILLp (av) + 1 - 1;
4385
4386 if (GIMME_V == G_SCALAR)
4387 XPUSHs (sv_2mortal (newSViv (wcount)));
4388 else
4389 {
4390 int i;
4391 EXTEND (SP, wcount);
4392 for (i = 1; i <= wcount; ++i)
4393 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4394 }
4395}
4396
4397MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4398
4399void
4400_may_delete (SV *sem, int count, unsigned int extra_refs)
4401 PPCODE:
4402{
4403 AV *av = (AV *)SvRV (sem);
4404
4405 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4406 && AvFILLp (av) == 0 /* no waiters, just count */
4407 && SvIV (AvARRAY (av)[0]) == count)
4408 XSRETURN_YES;
4409
4410 XSRETURN_NO;
4411}
4412
4413MODULE = Coro::State PACKAGE = Coro::Signal
4414
4415SV *
4416new (SV *klass)
4417 CODE:
4418 RETVAL = sv_bless (
4419 coro_waitarray_new (aTHX_ 0),
4420 GvSTASH (CvGV (cv))
4421 );
4422 OUTPUT:
4423 RETVAL
4424
4425void
4426wait (...)
4427 CODE:
4428 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4429
4430void
4431broadcast (SV *self)
4432 CODE:
4433{
4434 AV *av = (AV *)SvRV (self);
4435 coro_signal_wake (aTHX_ av, AvFILLp (av));
4436}
4437
4438void
4439send (SV *self)
4440 CODE:
4441{
4442 AV *av = (AV *)SvRV (self);
4443
4444 if (AvFILLp (av))
4445 coro_signal_wake (aTHX_ av, 1);
4446 else
4447 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4448}
4449
4450IV
4451awaited (SV *self)
4452 CODE:
4453 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4454 OUTPUT:
4455 RETVAL
4456
4457
4458MODULE = Coro::State PACKAGE = Coro::AnyEvent
4459
4460BOOT:
4461 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4462
4463void
4464_schedule (...)
4465 CODE:
4466{
4467 static int incede;
4468
1153 api_cede (); 4469 api_cede_notself (aTHX);
1154 4470
4471 ++incede;
4472 while (coro_nready >= incede && api_cede (aTHX))
4473 ;
4474
4475 sv_setsv (sv_activity, &PL_sv_undef);
4476 if (coro_nready >= incede)
4477 {
4478 PUSHMARK (SP);
4479 PUTBACK;
4480 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4481 }
4482
4483 --incede;
4484}
4485
4486
4487MODULE = Coro::State PACKAGE = Coro::AIO
4488
4489void
4490_register (char *target, char *proto, SV *req)
4491 CODE:
4492{
4493 SV *req_cv = s_get_cv_croak (req);
4494 /* newXSproto doesn't return the CV on 5.8 */
4495 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4496 sv_setpv ((SV *)slf_cv, proto);
4497 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4498}
4499
4500MODULE = Coro::State PACKAGE = Coro::Select
4501
4502void
4503patch_pp_sselect ()
4504 CODE:
4505 if (!coro_old_pp_sselect)
4506 {
4507 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4508 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4509 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4510 }
4511
4512void
4513unpatch_pp_sselect ()
4514 CODE:
4515 if (coro_old_pp_sselect)
4516 {
4517 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4518 coro_old_pp_sselect = 0;
4519 }
4520
4521MODULE = Coro::State PACKAGE = Coro::Util
4522
4523void
4524_exit (int code)
4525 CODE:
4526 _exit (code);
4527
4528NV
4529time ()
4530 CODE:
4531 RETVAL = nvtime (aTHX);
4532 OUTPUT:
4533 RETVAL
4534
4535NV
4536gettimeofday ()
4537 PPCODE:
4538{
4539 UV tv [2];
4540 u2time (aTHX_ tv);
4541 EXTEND (SP, 2);
4542 PUSHs (sv_2mortal (newSVuv (tv [0])));
4543 PUSHs (sv_2mortal (newSVuv (tv [1])));
4544}
4545

Diff Legend

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