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Comparing Coro/Coro/State.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:50:20 2006 UTC vs.
Revision 1.464 by root, Wed Jun 22 22:53:49 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#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
13# define PL_ppaddr ppaddr 20#include "ecb.h"
21
22#include <stddef.h>
23#include <stdio.h>
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;
14# endif 47# endif
15# ifndef call_sv 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
16# 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;
17# endif 108# endif
18# ifndef get_sv 109#endif
19# 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
20# endif 118# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif 119#endif
24# ifndef IS_PADGV 120
25# 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>
26# endif 125#endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 126
32#include <errno.h> 127static double (*nvtime)(); /* so why doesn't it take void? */
33#include <signal.h> 128static void (*u2time)(pTHX_ UV ret[2]);
34 129
35#ifdef HAVE_MMAP 130/* we hijack an hopefully unused CV flag for our purposes */
36# include <unistd.h> 131#define CVf_SLF 0x4000
37# include <sys/mman.h> 132static OP *pp_slf (pTHX);
38# ifndef MAP_ANONYMOUS 133static void slf_destroy (pTHX_ struct coro *coro);
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif
44# endif
45#endif
46 134
47#define SUB_INIT "Coro::State::initialize" 135static U32 cctx_gen;
48#define UCORO_STATE "_coro_state" 136static size_t cctx_stacksize = CORO_STACKSIZE;
49
50/* The next macro should declare a variable stacklevel that contains and approximation
51 * to the current C stack pointer. Its property is that it changes with each call
52 * and should be unique. */
53#define dSTACKLEVEL void *stacklevel = &stacklevel
54
55#define IN_DESTRUCT (PL_main_cv == Nullcv)
56
57#define labs(l) ((l) >= 0 ? (l) : -(l))
58
59#include "CoroAPI.h"
60
61#ifdef USE_ITHREADS
62static perl_mutex coro_mutex;
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif
69
70static struct CoroAPI coroapi; 137static struct CoroAPI coroapi;
71static 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;
72static HV *coro_state_stash; 140static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 141static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 142
77/* 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 */
78typedef struct { 183typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 184{
80 int usecnt; /* shared by how many coroutines */ 185 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 186
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;
83 coro_context cctx; 196 coro_context cctx;
84 197
85 void *sptr; 198 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 199#if CORO_USE_VALGRIND
87} coro_stack; 200 int valgrind_id;
201#endif
202 unsigned char flags;
203} coro_cctx;
88 204
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 */
89struct coro { 232struct coro
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233{
91 JMPENV start_env; 234 /* the C coroutine allocated to this perl coroutine, if any */
235 coro_cctx *cctx;
92 236
93 /* the optional C context */ 237 /* ready queue */
94 coro_stack *stack; 238 struct coro *next_ready;
95 void *cursp;
96 int gencnt;
97 239
98 /* optionally saved, might be zero */ 240 /* state data */
99 AV *defav; 241 struct CoroSLF slf_frame; /* saved slf frame */
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 242 AV *mainstack;
111 SV **stack_sp; 243 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 244
245 CV *startcv; /* the CV to execute */
138 /* data associated with this coroutine (initial args) */ 246 AV *args; /* data associated with this coroutine (initial args) */
139 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;
140}; 277};
141 278
142typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
144 281
145/* mostly copied from op.c:cv_clone2 */ 282/* the following variables are effectively part of the perl context */
146STATIC AV * 283/* and get copied between struct coro and these variables */
147clone_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)
148{ 335{
149 AV *av; 336 dSP;
150 I32 ix; 337 PUSHMARK (SP - 4); /* fake argument list */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 338 XPUSHs (coro_select_select);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 339 PUTBACK;
153 SV **pname = AvARRAY (protopad_name); 340
154 SV **ppad = AvARRAY (protopad); 341 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
155 I32 fname = AvFILLp (protopad_name); 342 PL_op->op_flags |= OPf_STACKED;
156 I32 fpad = AvFILLp (protopad); 343 PL_op->op_private = 0;
157 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{
158 SV **npad; 382 SV **svp;
159 383
160 newpad_name = newAV (); 384 require_pv ("Time/HiRes.pm");
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163 385
164 newpad = newAV (); 386 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 387
168 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. */
169 AvREAL_off (newpadlist); 573 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 574#endif
171 av_store (newpadlist, 1, (SV *) newpad);
172 575
173 av = newAV (); /* will be @_ */ 576 /* Already extended to 2 elements by newPADLIST. */
174 av_extend (av, 0); 577 PadlistMAX (newpadlist) = 1;
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177 578
178 for (ix = fpad; ix > 0; ix--) 579 padnames = PadlistNAMES (padlist);
179 { 580 ++PadnamelistREFCNT (padnames);
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 581 PadlistNAMES (newpadlist) = padnames;
181 582
182 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 */
183 { 597 {
184 char *name = SvPVX (namesv); /* XXX */ 598 /* we try to be extra-careful here */
599 PAD *pad = PadlistARRAY (padlist)[i--];
185 600
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 601 if (pad)
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 } 602 {
190 else 603 I32 j = PadMAX (pad);
191 { /* our own lexical */ 604
192 SV *sv; 605 while (j >= 0)
193 if (*name == '&') 606 SvREFCNT_dec (PadARRAY (pad)[j--]);
607
608 PadMAX (pad) = -1;
194 sv = SvREFCNT_inc (ppad[ix]); 609 SvREFCNT_dec (pad);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 } 610 }
209 } 611 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221 612
222#if 0 /* return -ENOTUNDERSTOOD */ 613 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
223 /* Now that vars are all in place, clone nested closures. */
224 614
225 for (ix = fpad; ix > 0; ix--) { 615#if NEWPADAPI
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 616 Safefree (PadlistARRAY (padlist));
227 if (namesv 617 Safefree (padlist);
228 && namesv != &PL_sv_undef 618#else
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241
242 return newpadlist;
243}
244
245STATIC void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 619 AvFILLp (padlist) = -1;
252 while (i >= 0) 620 AvREAL_off (padlist);
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 621 SvREFCNT_dec ((SV*)padlist);
622#endif
266 } 623 }
267} 624}
268 625
269STATIC int 626static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 627coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 628{
272 AV *padlist; 629 PADLIST *padlist;
273 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;
274 632
275 /* casting is fun. */ 633 /* perl manages to free our internal AV and _then_ call us */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 634 if (IN_DESTRUCT)
635 return 0;
636
637 while (len--)
277 free_padlist (aTHX_ padlist); 638 free_padlist (aTHX_ padlists[len]);
278 639
279 SvREFCNT_dec (av); 640 return 0;
280} 641}
281 642
282#define PERL_MAGIC_coro PERL_MAGIC_ext 643static MGVTBL coro_cv_vtbl = {
283 644 0, 0, 0, 0,
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 645 coro_cv_free
646};
285 647
286/* the next two functions merely cache the padlists */ 648/* the next two functions merely cache the padlists */
287STATIC void 649ecb_inline void
288get_padlist (pTHX_ CV *cv) 650get_padlist (pTHX_ CV *cv)
289{ 651{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 652 MAGIC *mg = CORO_MAGIC_cv (cv);
653 size_t *lenp;
291 654
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 655 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 656 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
294 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
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 667 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
668#endif
669 }
296} 670}
297 671
298STATIC void 672ecb_inline void
299put_padlist (pTHX_ CV *cv) 673put_padlist (pTHX_ CV *cv)
300{ 674{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 675 MAGIC *mg = CORO_MAGIC_cv (cv);
302 676
303 if (!mg) 677 if (ecb_expect_false (!mg))
304 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV ();
309 } 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);
310 687
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 688 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
312} 689}
313 690
314#define SB do { 691/** load & save, init *******************************************************/
315#define SE } while (0)
316 692
317#define LOAD(state) load_state(aTHX_ (state)); 693ecb_inline void
318#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;
319 698
320#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);
321 701
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 */
322static 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
323load_state(pTHX_ Coro__State c) 766load_perl (pTHX_ Coro__State c)
324{ 767{
325 PL_dowarn = c->dowarn; 768 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 769 c->slot = 0;
327 770
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 771 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 772
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 773#if CORO_JIT
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 774 load_perl_slots (slot);
362 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
363 779
364 { 780 {
365 dSP; 781 dSP;
782
366 CV *cv; 783 CV *cv;
367 784
368 /* now do the ugly restore mess */ 785 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 786 while (ecb_expect_true (cv = (CV *)POPs))
370 { 787 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 788 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 789 CvDEPTH (cv) = PTR2IV (POPs);
377 } 790 CvPADLIST (cv) = (PADLIST *)POPs;
378
379 ++CvDEPTH(cv);
380 } 791 }
381 792
382 PUTBACK; 793 PUTBACK;
383 } 794 }
384}
385 795
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
386static void 826static void
387save_state(pTHX_ Coro__State c, int flags) 827save_perl (pTHX_ Coro__State c)
388{ 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
389 { 858 {
390 dSP; 859 dSP;
391 I32 cxix = cxstack_ix; 860 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 861 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 862 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 864 /*
396 * 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
397 * (and reinitialize) all cv's in the whole callchain :( 866 * (and reinitialize) all cv's in the whole callchain :(
398 */ 867 */
399 868
400 PUSHs (Nullsv); 869 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 870 /* this loop was inspired by pp_caller */
402 for (;;) 871 for (;;)
403 { 872 {
404 while (cxix >= 0) 873 while (ecb_expect_true (cxix >= 0))
405 { 874 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 875 PERL_CONTEXT *cx = &ccstk[cxix--];
407 876
408 if (CxTYPE(cx) == CXt_SUB) 877 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
409 { 878 {
410 CV *cv = cx->blk_sub.cv; 879 CV *cv = cx->blk_sub.cv;
880
411 if (CvDEPTH(cv)) 881 if (ecb_expect_true (CvDEPTH (cv)))
412 { 882 {
413 EXTEND (SP, CvDEPTH(cv)*2); 883 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 884 PUSHs ((SV *)CvPADLIST (cv));
885 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 886 PUSHs ((SV *)cv);
424 887
888 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 889 get_padlist (aTHX_ cv);
426 } 890 }
427 } 891 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 892 }
437 893
438 if (top_si->si_type == PERLSI_MAIN) 894 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 895 break;
440 896
441 top_si = top_si->si_prev; 897 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 898 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 899 cxix = top_si->si_cxix;
444 } 900 }
445 901
446 PUTBACK; 902 PUTBACK;
447 } 903 }
448 904
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 905 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 906 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 907 {
908 unsigned int i;
452 909
453 c->dowarn = PL_dowarn; 910 for (i = 0; i < SLOT_COUNT; ++i)
454 c->in_eval = PL_in_eval; 911 CXINC;
455 912
456 c->curstackinfo = PL_curstackinfo; 913 cxstack_ix -= SLOT_COUNT; /* undo allocation */
457 c->curstack = PL_curstack; 914 }
915
458 c->mainstack = PL_mainstack; 916 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 917
460 c->op = PL_op; 918 {
461 c->curpad = PL_curpad; 919 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 920
463 c->compcv = PL_compcv; 921#if CORO_JIT
464 c->stack_base = PL_stack_base; 922 save_perl_slots (slot);
465 c->stack_max = PL_stack_max; 923#else
466 c->tmps_stack = PL_tmps_stack; 924 #define VARx(name,expr,type) slot->name = expr;
467 c->tmps_floor = PL_tmps_floor; 925 #include "state.h"
468 c->tmps_ix = PL_tmps_ix;
469 c->tmps_max = PL_tmps_max;
470 c->markstack = PL_markstack;
471 c->markstack_ptr = PL_markstack_ptr;
472 c->markstack_max = PL_markstack_max;
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif 926#endif
484 c->curpm = PL_curpm; 927 }
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 928}
488 929
489/* 930/*
490 * allocate various perl stacks. This is an exact copy 931 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 932 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 933 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 934 * not usually need a lot of stackspace.
494 */ 935 */
495STATIC void 936#if CORO_PREFER_PERL_FUNCTIONS
937# define coro_init_stacks(thx) init_stacks ()
938#else
939static void
496coro_init_stacks (pTHX) 940coro_init_stacks (pTHX)
497{ 941{
498 LOCK; 942 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 943 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 944 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 945 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 946
505 PL_stack_base = AvARRAY(PL_curstack); 947 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 948 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 949 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 950
509 New(50,PL_tmps_stack,96,SV*); 951 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 952 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 953 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 954 PL_tmps_max = 32;
513 955
514 New(54,PL_markstack,16,I32); 956 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 957 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 958 PL_markstack_max = PL_markstack + 16;
517 959
518#ifdef SET_MARK_OFFSET 960#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 961 SET_MARK_OFFSET;
520#endif 962#endif
521 963
522 New(54,PL_scopestack,16,I32); 964 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 965 PL_scopestack_ix = 0;
524 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
525 970
526 New(54,PL_savestack,96,ANY); 971 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 972 PL_savestack_ix = 0;
528 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
529 979
530#if PERL_VERSION < 9 980#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 981 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 982 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 983 PL_retstack_max = 4;
534#endif 984#endif
535
536 UNLOCK;
537} 985}
986#endif
538 987
539/* 988/*
540 * destroy the stacks, the callchain etc... 989 * destroy the stacks, the callchain etc...
541 */ 990 */
542STATIC void 991static void
543destroy_stacks(pTHX) 992coro_destruct_stacks (pTHX)
544{ 993{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 994 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 995 PL_curstackinfo = PL_curstackinfo->si_next;
558 996
559 while (PL_curstackinfo) 997 while (PL_curstackinfo)
560 { 998 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 999 PERL_SI *p = PL_curstackinfo->si_prev;
562 1000
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 1001 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 1002 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 1003
575 Safefree (PL_curstackinfo->si_cxstack); 1004 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 1005 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 1006 PL_curstackinfo = p;
578 } 1007 }
579 1008
580 Safefree (PL_tmps_stack); 1009 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 1010 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 1011 Safefree (PL_scopestack);
1012#if HAS_SCOPESTACK_NAME
1013 Safefree (PL_scopestack_name);
1014#endif
583 Safefree (PL_savestack); 1015 Safefree (PL_savestack);
584#if PERL_VERSION < 9 1016#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 1017 Safefree (PL_retstack);
586#endif 1018#endif
587} 1019}
588 1020
589static void 1021#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 1022 rss += sizeof (SYM (curstackinfo)); \
591{ 1023 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 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);
593 1029
594 New (0, stack, 1, coro_stack); 1030static size_t
1031coro_rss (pTHX_ struct coro *coro)
1032{
1033 size_t rss = sizeof (*coro);
595 1034
596 stack->refcnt = 1; 1035 if (coro->mainstack)
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 { 1036 {
602#if HAVE_MMAP 1037 if (coro->flags & CF_RUNNING)
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 if (stack->sptr == (void *)-1)
606#endif
607 { 1038 {
608 /*FIXME*//*D*//* reasonable stack size! */ 1039 #define SYM(sym) PL_ ## sym
609 stack->ssize = - (STACKSIZE * sizeof (long)); 1040 CORO_RSS;
610 New (0, stack->sptr, STACKSIZE, long); 1041 #undef SYM
611 } 1042 }
612 }
613 else 1043 else
614 stack->sptr = 0;
615
616 ctx->stack = stack;
617}
618
619static void
620deallocate_stack (Coro__State ctx)
621{
622 coro_stack *stack = ctx->stack;
623
624 ctx->stack = 0;
625
626 if (stack)
627 {
628 if (!--stack->refcnt)
629 { 1044 {
630#ifdef HAVE_MMAP 1045 #define SYM(sym) coro->slot->sym
631 if (stack->ssize > 0 && stack->sptr) 1046 CORO_RSS;
632 munmap (stack->sptr, stack->ssize); 1047 #undef SYM
1048 }
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 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1070 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1071 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1072 return 1;
1073}
1074
1075/* perl does not have a %SIG vtbl, we provide one so we can override */
1076/* the cwvtblagic for %SIG members */
1077static const MGVTBL coro_sig_vtbl = {
1078 0, 0, 0, 0, 0,
1079 coro_sig_copy
1080};
1081
1082/*
1083 * This overrides the default magic get method of %SIG elements.
1084 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1085 * and instead of trying to save and restore the hash elements (extremely slow),
1086 * we just provide our own readback here.
1087 */
1088static int ecb_cold
1089coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1090{
1091 const char *s = MgPV_nolen_const (mg);
1092
1093 if (*s == '_')
1094 {
1095 SV **svp = 0;
1096
1097 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1098 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1099
1100 if (svp)
1101 {
1102 SV *ssv;
1103
1104 if (!*svp)
1105 ssv = &PL_sv_undef;
1106 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1107 ssv = sv_2mortal (newRV_inc (*svp));
633 else 1108 else
634#endif 1109 ssv = *svp;
635 Safefree (stack->sptr);
636 1110
637 Safefree (stack); 1111 sv_setsv (sv, ssv);
1112 return 0;
638 } 1113 }
639 else if (ctx->gencnt == stack->gencnt) 1114 }
640 --stack->usecnt; 1115
1116 return PL_vtbl_sigelem.svt_get ? PL_vtbl_sigelem.svt_get (aTHX_ sv, mg) : 0;
1117}
1118
1119static int ecb_cold
1120coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1121{
1122 const char *s = MgPV_nolen_const (mg);
1123
1124 if (*s == '_')
641 } 1125 {
642} 1126 SV **svp = 0;
643 1127
1128 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1129 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1130
1131 if (svp)
1132 {
1133 SV *old = *svp;
1134 *svp = 0;
1135 SvREFCNT_dec (old);
1136 return 0;
1137 }
1138 }
1139
1140 return PL_vtbl_sigelem.svt_clear ? PL_vtbl_sigelem.svt_clear (aTHX_ sv, mg) : 0;
1141}
1142
1143static int ecb_cold
1144coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1145{
1146 const char *s = MgPV_nolen_const (mg);
1147
1148 if (*s == '_')
1149 {
1150 SV **svp = 0;
1151
1152 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1153 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1154
1155 if (svp)
1156 {
1157 SV *old = *svp;
1158 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1159 SvREFCNT_dec (old);
1160 return 0;
1161 }
1162 }
1163
1164 return PL_vtbl_sigelem.svt_set ? PL_vtbl_sigelem.svt_set (aTHX_ sv, mg) : 0;
1165}
1166
1167static void
1168prepare_nop (pTHX_ struct coro_transfer_args *ta)
1169{
1170 /* kind of mega-hacky, but works */
1171 ta->next = ta->prev = (struct coro *)ta;
1172}
1173
644static void 1174static int
645setup_coro (void *arg) 1175slf_check_nop (pTHX_ struct CoroSLF *frame)
1176{
1177 return 0;
1178}
1179
1180static int
1181slf_check_repeat (pTHX_ struct CoroSLF *frame)
1182{
1183 return 1;
1184}
1185
1186/** coroutine stack handling ************************************************/
1187
1188static UNOP init_perl_op;
1189
1190ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1191init_perl (pTHX_ struct coro *coro)
646{ 1192{
647 /* 1193 /*
648 * emulate part of the perl startup here. 1194 * emulate part of the perl startup here.
649 */ 1195 */
1196 coro_init_stacks (aTHX);
1197
1198 PL_runops = RUNOPS_DEFAULT;
1199 PL_curcop = &PL_compiling;
1200 PL_in_eval = EVAL_NULL;
1201 PL_comppad = 0;
1202 PL_comppad_name = 0;
1203 PL_comppad_name_fill = 0;
1204 PL_comppad_name_floor = 0;
1205 PL_curpm = 0;
1206 PL_curpad = 0;
1207 PL_localizing = 0;
1208 PL_restartop = 0;
1209#if PERL_VERSION_ATLEAST (5,10,0)
1210 PL_parser = 0;
1211#endif
1212 PL_hints = 0;
1213
1214 /* recreate the die/warn hooks */
1215 PL_diehook = SvREFCNT_inc (rv_diehook);
1216 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1217
1218 GvSV (PL_defgv) = newSV (0);
1219 GvAV (PL_defgv) = coro->args; coro->args = 0;
1220 GvSV (PL_errgv) = newSV (0);
1221 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1222 GvHV (PL_hintgv) = newHV ();
1223#if PERL_VERSION_ATLEAST (5,10,0)
1224 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1225#endif
1226 PL_rs = newSVsv (GvSV (irsgv));
1227 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1228
1229 {
1230 dSP;
1231 UNOP myop;
1232
1233 Zero (&myop, 1, UNOP);
1234 myop.op_next = Nullop;
1235 myop.op_type = OP_ENTERSUB;
1236 myop.op_flags = OPf_WANT_VOID;
1237
1238 PUSHMARK (SP);
1239 PUSHs ((SV *)coro->startcv);
1240 PUTBACK;
1241 PL_op = (OP *)&myop;
1242 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1243 }
1244
1245 /* this newly created coroutine might be run on an existing cctx which most
1246 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1247 */
1248 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1249 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1250 slf_frame.destroy = 0;
1251
1252 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1253 init_perl_op.op_next = PL_op;
1254 init_perl_op.op_type = OP_ENTERSUB;
1255 init_perl_op.op_ppaddr = pp_slf;
1256 /* no flags etc. required, as an init function won't be called */
1257
1258 PL_op = (OP *)&init_perl_op;
1259
1260 /* copy throw, in case it was set before init_perl */
1261 CORO_THROW = coro->except;
1262
1263 SWAP_SVS_ENTER (coro);
1264
1265 if (ecb_expect_false (enable_times))
1266 {
1267 coro_times_update ();
1268 coro_times_sub (coro);
1269 }
1270}
1271
1272static void
1273coro_unwind_stacks (pTHX)
1274{
1275 if (!IN_DESTRUCT)
1276 {
1277 /* restore all saved variables and stuff */
1278 LEAVE_SCOPE (0);
1279 assert (PL_tmps_floor == -1);
1280
1281 /* free all temporaries */
1282 FREETMPS;
1283 assert (PL_tmps_ix == -1);
1284
1285 /* unwind all extra stacks */
1286 POPSTACK_TO (PL_mainstack);
1287
1288 /* unwind main stack */
1289 dounwind (-1);
1290 }
1291}
1292
1293static void
1294destroy_perl (pTHX_ struct coro *coro)
1295{
1296 SV *svf [9];
1297
1298 {
1299 SV *old_current = SvRV (coro_current);
1300 struct coro *current = SvSTATE (old_current);
1301
1302 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1303
1304 save_perl (aTHX_ current);
1305
1306 /* this will cause transfer_check to croak on block*/
1307 SvRV_set (coro_current, (SV *)coro->hv);
1308
1309 load_perl (aTHX_ coro);
1310
1311 /* restore swapped sv's */
1312 SWAP_SVS_LEAVE (coro);
1313
1314 coro_unwind_stacks (aTHX);
1315
1316 coro_destruct_stacks (aTHX);
1317
1318 /* now save some sv's to be free'd later */
1319 svf [0] = GvSV (PL_defgv);
1320 svf [1] = (SV *)GvAV (PL_defgv);
1321 svf [2] = GvSV (PL_errgv);
1322 svf [3] = (SV *)PL_defoutgv;
1323 svf [4] = PL_rs;
1324 svf [5] = GvSV (irsgv);
1325 svf [6] = (SV *)GvHV (PL_hintgv);
1326 svf [7] = PL_diehook;
1327 svf [8] = PL_warnhook;
1328 assert (9 == sizeof (svf) / sizeof (*svf));
1329
1330 SvRV_set (coro_current, old_current);
1331
1332 load_perl (aTHX_ current);
1333 }
1334
1335 {
1336 unsigned int i;
1337
1338 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1339 SvREFCNT_dec (svf [i]);
1340
1341 SvREFCNT_dec (coro->saved_deffh);
1342 SvREFCNT_dec (coro->rouse_cb);
1343 SvREFCNT_dec (coro->invoke_cb);
1344 SvREFCNT_dec (coro->invoke_av);
1345 SvREFCNT_dec (coro->on_enter_xs);
1346 SvREFCNT_dec (coro->on_leave_xs);
1347 }
1348}
1349
1350ecb_inline void
1351free_coro_mortal (pTHX)
1352{
1353 if (ecb_expect_true (coro_mortal))
1354 {
1355 SvREFCNT_dec ((SV *)coro_mortal);
1356 coro_mortal = 0;
1357 }
1358}
1359
1360static int
1361runops_trace (pTHX)
1362{
1363 COP *oldcop = 0;
1364 int oldcxix = -2;
1365
1366 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1367 {
1368 PERL_ASYNC_CHECK ();
1369
1370 if (cctx_current->flags & CC_TRACE_ALL)
1371 {
1372 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1373 {
1374 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1375 SV **bot, **top;
1376 AV *av = newAV (); /* return values */
1377 SV **cb;
1378 dSP;
1379
1380 GV *gv = CvGV (cx->blk_sub.cv);
1381 SV *fullname = sv_2mortal (newSV (0));
1382 if (isGV (gv))
1383 gv_efullname3 (fullname, gv, 0);
1384
1385 bot = PL_stack_base + cx->blk_oldsp + 1;
1386 top = cx->blk_gimme == G_ARRAY ? SP + 1
1387 : cx->blk_gimme == G_SCALAR ? bot + 1
1388 : bot;
1389
1390 av_extend (av, top - bot);
1391 while (bot < top)
1392 av_push (av, SvREFCNT_inc_NN (*bot++));
1393
1394 PL_runops = RUNOPS_DEFAULT;
1395 ENTER;
1396 SAVETMPS;
1397 EXTEND (SP, 3);
1398 PUSHMARK (SP);
1399 PUSHs (&PL_sv_no);
1400 PUSHs (fullname);
1401 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1402 PUTBACK;
1403 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1404 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1405 SPAGAIN;
1406 FREETMPS;
1407 LEAVE;
1408 PL_runops = runops_trace;
1409 }
1410
1411 if (oldcop != PL_curcop)
1412 {
1413 oldcop = PL_curcop;
1414
1415 if (PL_curcop != &PL_compiling)
1416 {
1417 SV **cb;
1418
1419 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1420 {
1421 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1422
1423 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1424 {
1425 dSP;
1426 GV *gv = CvGV (cx->blk_sub.cv);
1427 SV *fullname = sv_2mortal (newSV (0));
1428
1429 if (isGV (gv))
1430 gv_efullname3 (fullname, gv, 0);
1431
1432 PL_runops = RUNOPS_DEFAULT;
1433 ENTER;
1434 SAVETMPS;
1435 EXTEND (SP, 3);
1436 PUSHMARK (SP);
1437 PUSHs (&PL_sv_yes);
1438 PUSHs (fullname);
1439 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1440 PUTBACK;
1441 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_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 oldcxix = cxstack_ix;
1450 }
1451
1452 if (cctx_current->flags & CC_TRACE_LINE)
1453 {
1454 dSP;
1455
1456 PL_runops = RUNOPS_DEFAULT;
1457 ENTER;
1458 SAVETMPS;
1459 EXTEND (SP, 3);
1460 PL_runops = RUNOPS_DEFAULT;
1461 PUSHMARK (SP);
1462 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1463 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1464 PUTBACK;
1465 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1466 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1467 SPAGAIN;
1468 FREETMPS;
1469 LEAVE;
1470 PL_runops = runops_trace;
1471 }
1472 }
1473 }
1474 }
1475 }
1476
1477 TAINT_NOT;
1478 return 0;
1479}
1480
1481static struct CoroSLF cctx_ssl_frame;
1482
1483static void
1484slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1485{
1486 ta->prev = 0;
1487}
1488
1489static int
1490slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1491{
1492 *frame = cctx_ssl_frame;
1493
1494 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1495}
1496
1497/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1498static void ecb_noinline
1499cctx_prepare (pTHX)
1500{
1501 PL_top_env = &PL_start_env;
1502
1503 if (cctx_current->flags & CC_TRACE)
1504 PL_runops = runops_trace;
1505
1506 /* we already must be executing an SLF op, there is no other valid way
1507 * that can lead to creation of a new cctx */
1508 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1509 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1510
1511 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1512 cctx_ssl_frame = slf_frame;
1513
1514 slf_frame.prepare = slf_prepare_set_stacklevel;
1515 slf_frame.check = slf_check_set_stacklevel;
1516}
1517
1518/* the tail of transfer: execute stuff we can only do after a transfer */
1519ecb_inline void
1520transfer_tail (pTHX)
1521{
1522 free_coro_mortal (aTHX);
1523}
1524
1525/* try to exit the same way perl's main function would do */
1526/* we do not bother resetting the environment or other things *7
1527/* that are not, uhm, essential */
1528/* this obviously also doesn't work when perl is embedded */
1529static void ecb_noinline ecb_cold
1530perlish_exit (pTHX)
1531{
1532 int exitstatus = perl_destruct (PL_curinterp);
1533 perl_free (PL_curinterp);
1534 exit (exitstatus);
1535}
1536
1537/*
1538 * this is a _very_ stripped down perl interpreter ;)
1539 */
1540static void
1541cctx_run (void *arg)
1542{
1543#ifdef USE_ITHREADS
1544# if CORO_PTHREAD
1545 PERL_SET_CONTEXT (coro_thx);
1546# endif
1547#endif
1548 {
1549 dTHX;
1550
1551 /* normally we would need to skip the entersub here */
1552 /* not doing so will re-execute it, which is exactly what we want */
1553 /* PL_nop = PL_nop->op_next */
1554
1555 /* inject a fake subroutine call to cctx_init */
1556 cctx_prepare (aTHX);
1557
1558 /* cctx_run is the alternative tail of transfer() */
1559 transfer_tail (aTHX);
1560
1561 /* somebody or something will hit me for both perl_run and PL_restartop */
1562 PL_restartop = PL_op;
1563 perl_run (PL_curinterp);
1564 /*
1565 * Unfortunately, there is no way to get at the return values of the
1566 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1567 * runtime errors here, as this is just a random interpreter, not a thread.
1568 */
1569
1570 /*
1571 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1572 * requires PL_scopestack_ix, so do it here if required.
1573 */
1574 if (!PL_scopestack_ix)
1575 ENTER;
1576
1577 /*
1578 * If perl-run returns we assume exit() was being called or the coro
1579 * fell off the end, which seems to be the only valid (non-bug)
1580 * reason for perl_run to return. We try to mimic whatever perl is normally
1581 * doing in that case. YMMV.
1582 */
1583 perlish_exit (aTHX);
1584 }
1585}
1586
1587static coro_cctx *
1588cctx_new (void)
1589{
1590 coro_cctx *cctx;
1591
1592 ++cctx_count;
1593 New (0, cctx, 1, coro_cctx);
1594
1595 cctx->gen = cctx_gen;
1596 cctx->flags = 0;
1597 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1598
1599 return cctx;
1600}
1601
1602/* create a new cctx only suitable as source */
1603static coro_cctx *
1604cctx_new_empty (void)
1605{
1606 coro_cctx *cctx = cctx_new ();
1607
1608 cctx->stack.sptr = 0;
1609 coro_create (&cctx->cctx, 0, 0, 0, 0);
1610
1611 return cctx;
1612}
1613
1614/* create a new cctx suitable as destination/running a perl interpreter */
1615static coro_cctx *
1616cctx_new_run (void)
1617{
1618 coro_cctx *cctx = cctx_new ();
1619
1620 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1621 {
1622 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1623 _exit (EXIT_FAILURE);
1624 }
1625
1626 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1627
1628 return cctx;
1629}
1630
1631static void
1632cctx_destroy (coro_cctx *cctx)
1633{
1634 if (!cctx)
1635 return;
1636
1637 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1638
1639 --cctx_count;
1640 coro_destroy (&cctx->cctx);
1641
1642 coro_stack_free (&cctx->stack);
1643
1644 Safefree (cctx);
1645}
1646
1647/* wether this cctx should be destructed */
1648#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1649
1650static coro_cctx *
1651cctx_get (pTHX)
1652{
1653 while (ecb_expect_true (cctx_first))
1654 {
1655 coro_cctx *cctx = cctx_first;
1656 cctx_first = cctx->next;
1657 --cctx_idle;
1658
1659 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1660 return cctx;
1661
1662 cctx_destroy (cctx);
1663 }
1664
1665 return cctx_new_run ();
1666}
1667
1668static void
1669cctx_put (coro_cctx *cctx)
1670{
1671 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1672
1673 /* free another cctx if overlimit */
1674 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1675 {
1676 coro_cctx *first = cctx_first;
1677 cctx_first = first->next;
1678 --cctx_idle;
1679
1680 cctx_destroy (first);
1681 }
1682
1683 ++cctx_idle;
1684 cctx->next = cctx_first;
1685 cctx_first = cctx;
1686}
1687
1688/** coroutine switching *****************************************************/
1689
1690static void
1691transfer_check (pTHX_ struct coro *prev, struct coro *next)
1692{
1693 /* TODO: throwing up here is considered harmful */
1694
1695 if (ecb_expect_true (prev != next))
1696 {
1697 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1698 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1699
1700 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1701 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1702
1703#if !PERL_VERSION_ATLEAST (5,10,0)
1704 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1705 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1706#endif
1707 }
1708}
1709
1710/* always use the TRANSFER macro */
1711static void ecb_noinline /* noinline so we have a fixed stackframe */
1712transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1713{
1714 dSTACKLEVEL;
1715
1716 /* sometimes transfer is only called to set idle_sp */
1717 if (ecb_expect_false (!prev))
1718 {
1719 cctx_current->idle_sp = STACKLEVEL;
1720 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1721 }
1722 else if (ecb_expect_true (prev != next))
1723 {
1724 coro_cctx *cctx_prev;
1725
1726 if (ecb_expect_false (prev->flags & CF_NEW))
1727 {
1728 /* create a new empty/source context */
1729 prev->flags &= ~CF_NEW;
1730 prev->flags |= CF_RUNNING;
1731 }
1732
1733 prev->flags &= ~CF_RUNNING;
1734 next->flags |= CF_RUNNING;
1735
1736 /* first get rid of the old state */
1737 save_perl (aTHX_ prev);
1738
1739 if (ecb_expect_false (next->flags & CF_NEW))
1740 {
1741 /* need to start coroutine */
1742 next->flags &= ~CF_NEW;
1743 /* setup coroutine call */
1744 init_perl (aTHX_ next);
1745 }
1746 else
1747 load_perl (aTHX_ next);
1748
1749 /* possibly untie and reuse the cctx */
1750 if (ecb_expect_true (
1751 cctx_current->idle_sp == STACKLEVEL
1752 && !(cctx_current->flags & CC_TRACE)
1753 && !force_cctx
1754 ))
1755 {
1756 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1757 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1758
1759 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1760 /* without this the next cctx_get might destroy the running cctx while still in use */
1761 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1762 if (ecb_expect_true (!next->cctx))
1763 next->cctx = cctx_get (aTHX);
1764
1765 cctx_put (cctx_current);
1766 }
1767 else
1768 prev->cctx = cctx_current;
1769
1770 ++next->usecount;
1771
1772 cctx_prev = cctx_current;
1773 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1774
1775 next->cctx = 0;
1776
1777 if (ecb_expect_false (cctx_prev != cctx_current))
1778 {
1779 cctx_prev->top_env = PL_top_env;
1780 PL_top_env = cctx_current->top_env;
1781 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1782 }
1783
1784 transfer_tail (aTHX);
1785 }
1786}
1787
1788#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1789#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1790
1791/** high level stuff ********************************************************/
1792
1793/* this function is actually Coro, not Coro::State, but we call it from here */
1794/* because it is convenient - but it hasn't been declared yet for that reason */
1795static void
1796coro_call_on_destroy (pTHX_ struct coro *coro);
1797
1798static void
1799coro_state_destroy (pTHX_ struct coro *coro)
1800{
1801 if (coro->flags & CF_ZOMBIE)
1802 return;
1803
1804 slf_destroy (aTHX_ coro);
1805
1806 coro->flags |= CF_ZOMBIE;
1807
1808 if (coro->flags & CF_READY)
1809 {
1810 /* reduce nready, as destroying a ready coro effectively unreadies it */
1811 /* alternative: look through all ready queues and remove the coro */
1812 --coro_nready;
1813 }
1814 else
1815 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1816
1817 if (coro->next) coro->next->prev = coro->prev;
1818 if (coro->prev) coro->prev->next = coro->next;
1819 if (coro == coro_first) coro_first = coro->next;
1820
1821 if (coro->mainstack
1822 && coro->mainstack != main_mainstack
1823 && coro->slot
1824 && !PL_dirty)
1825 destroy_perl (aTHX_ coro);
1826
1827 cctx_destroy (coro->cctx);
1828 SvREFCNT_dec (coro->startcv);
1829 SvREFCNT_dec (coro->args);
1830 SvREFCNT_dec (coro->swap_sv);
1831 SvREFCNT_dec (CORO_THROW);
1832
1833 coro_call_on_destroy (aTHX_ coro);
1834
1835 /* more destruction mayhem in coro_state_free */
1836}
1837
1838static int
1839coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1840{
1841 struct coro *coro = (struct coro *)mg->mg_ptr;
1842 mg->mg_ptr = 0;
1843
1844 coro_state_destroy (aTHX_ coro);
1845 SvREFCNT_dec (coro->on_destroy);
1846 SvREFCNT_dec (coro->status);
1847
1848 Safefree (coro);
1849
1850 return 0;
1851}
1852
1853static int ecb_cold
1854coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1855{
1856 /* called when perl clones the current process the slow way (windows process emulation) */
1857 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1858 mg->mg_ptr = 0;
1859 mg->mg_virtual = 0;
1860
1861 return 0;
1862}
1863
1864static MGVTBL coro_state_vtbl = {
1865 0, 0, 0, 0,
1866 coro_state_free,
1867 0,
1868#ifdef MGf_DUP
1869 coro_state_dup,
1870#else
1871# define MGf_DUP 0
1872#endif
1873};
1874
1875static void
1876prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1877{
1878 ta->prev = SvSTATE (prev_sv);
1879 ta->next = SvSTATE (next_sv);
1880 TRANSFER_CHECK (*ta);
1881}
1882
1883static void
1884api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1885{
1886 struct coro_transfer_args ta;
1887
1888 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1889 TRANSFER (ta, 1);
1890}
1891
1892/** Coro ********************************************************************/
1893
1894ecb_inline void
1895coro_enq (pTHX_ struct coro *coro)
1896{
1897 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1898
1899 SvREFCNT_inc_NN (coro->hv);
1900
1901 coro->next_ready = 0;
1902 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1903 ready [1] = coro;
1904}
1905
1906ecb_inline struct coro *
1907coro_deq (pTHX)
1908{
1909 int prio;
1910
1911 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1912 {
1913 struct coro **ready = coro_ready [prio];
1914
1915 if (ready [0])
1916 {
1917 struct coro *coro = ready [0];
1918 ready [0] = coro->next_ready;
1919 return coro;
1920 }
1921 }
1922
1923 return 0;
1924}
1925
1926static void
1927invoke_sv_ready_hook_helper (void)
1928{
650 dTHX; 1929 dTHX;
651 dSP; 1930 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1931
655 coro_init_stacks (aTHX); 1932 ENTER;
656 /*PL_curcop = 0;*/ 1933 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1934
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1935 PUSHMARK (SP);
668 PUTBACK; 1936 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1937 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1938
671 if (SvTRUE (ERRSV)) 1939 FREETMPS;
672 croak (NULL); 1940 LEAVE;
673 else 1941}
674 croak ("FATAL: CCTXT coroutine returned!"); 1942
1943static int
1944api_ready (pTHX_ SV *coro_sv)
1945{
1946 struct coro *coro = SvSTATE (coro_sv);
1947
1948 if (coro->flags & CF_READY)
1949 return 0;
1950
1951 coro->flags |= CF_READY;
1952
1953 coro_enq (aTHX_ coro);
1954
1955 if (!coro_nready++)
1956 if (coroapi.readyhook)
1957 coroapi.readyhook ();
1958
1959 return 1;
1960}
1961
1962static int
1963api_is_ready (pTHX_ SV *coro_sv)
1964{
1965 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1966}
1967
1968/* expects to own a reference to next->hv */
1969ecb_inline void
1970prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1971{
1972 SV *prev_sv = SvRV (coro_current);
1973
1974 ta->prev = SvSTATE_hv (prev_sv);
1975 ta->next = next;
1976
1977 TRANSFER_CHECK (*ta);
1978
1979 SvRV_set (coro_current, (SV *)next->hv);
1980
1981 free_coro_mortal (aTHX);
1982 coro_mortal = prev_sv;
1983}
1984
1985static void
1986prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1987{
1988 for (;;)
675 } 1989 {
676 else 1990 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1991
680 PL_op = (OP *)&myop; 1992 if (ecb_expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 {
729 if (next->mainstack)
730 { 1993 {
731 LOCK; 1994 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1995 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
733 LOAD (next); 1996 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1997 else
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 1998 {
743 if (!prev->stack) 1999 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 2000 --coro_nready;
745 else if (prev->cursp != stacklevel 2001
746 && prev->stack->usecnt > 1) 2002 prepare_schedule_to (aTHX_ ta, next);
747 { 2003 break;
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 } 2004 }
766 else
767 next->cursp = stacklevel;
768 } 2005 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 2006 else
772 { 2007 {
773 LOCK; 2008 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 2009 if (SvROK (sv_idle)
775 UNLOCK; 2010 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 2011 {
779 if (!prev->stack) 2012 if (SvRV (sv_idle) == SvRV (coro_current))
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 { 2013 {
784 PL_top_env = &next->start_env; 2014 require_pv ("Carp");
785 2015
786 setup_coro (next); 2016 {
787 next->cursp = stacklevel; 2017 dSP;
788 2018
789 prev->stack->refcnt++; 2019 ENTER;
790 prev->stack->usecnt++; 2020 SAVETMPS;
791 next->stack = prev->stack; 2021
792 next->gencnt = prev->gencnt; 2022 PUSHMARK (SP);
2023 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2024 PUTBACK;
2025 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2026
2027 FREETMPS;
2028 LEAVE;
2029 }
793 } 2030 }
794 else 2031
795 { 2032 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
796 assert (!next->stack); 2033 api_ready (aTHX_ SvRV (sv_idle));
797 allocate_stack (next, 1); 2034 --coro_nready;
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 } 2035 }
806 else 2036 else
807 { 2037 {
808 setup_coro (next); 2038 /* TODO: deprecated, remove, cannot work reliably *//*D*/
809 next->cursp = stacklevel; 2039 dSP;
2040
2041 ENTER;
2042 SAVETMPS;
2043
2044 PUSHMARK (SP);
2045 PUTBACK;
2046 call_sv (sv_idle, G_VOID | G_DISCARD);
2047
2048 FREETMPS;
2049 LEAVE;
810 } 2050 }
811 } 2051 }
812 } 2052 }
2053}
813 2054
814 LOCK; 2055ecb_inline void
2056prepare_cede (pTHX_ struct coro_transfer_args *ta)
2057{
2058 api_ready (aTHX_ coro_current);
2059 prepare_schedule (aTHX_ ta);
2060}
2061
2062ecb_inline void
2063prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2064{
2065 SV *prev = SvRV (coro_current);
2066
815 if (coro_mortal) 2067 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 2068 {
820 UNLOCK; 2069 prepare_schedule (aTHX_ ta);
2070 api_ready (aTHX_ prev);
2071 }
2072 else
2073 prepare_nop (aTHX_ ta);
821} 2074}
822 2075
823#define SV_CORO(sv,func) \ 2076static void
824 do { \ 2077api_schedule (pTHX)
825 if (SvROK (sv)) \ 2078{
826 sv = SvRV (sv); \ 2079 struct coro_transfer_args ta;
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 2080
844#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 2081 prepare_schedule (aTHX_ &ta);
2082 TRANSFER (ta, 1);
2083}
845 2084
2085static void
2086api_schedule_to (pTHX_ SV *coro_sv)
2087{
2088 struct coro_transfer_args ta;
2089 struct coro *next = SvSTATE (coro_sv);
2090
2091 SvREFCNT_inc_NN (coro_sv);
2092 prepare_schedule_to (aTHX_ &ta, next);
2093}
2094
846static void 2095static int
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 2096api_cede (pTHX)
848{ 2097{
849 SV_CORO (prev, "Coro::transfer"); 2098 struct coro_transfer_args ta;
850 SV_CORO (next, "Coro::transfer");
851 2099
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2100 prepare_cede (aTHX_ &ta);
853}
854 2101
2102 if (ecb_expect_true (ta.prev != ta.next))
2103 {
2104 TRANSFER (ta, 1);
2105 return 1;
2106 }
2107 else
2108 return 0;
2109}
2110
2111static int
2112api_cede_notself (pTHX)
2113{
2114 if (coro_nready)
2115 {
2116 struct coro_transfer_args ta;
2117
2118 prepare_cede_notself (aTHX_ &ta);
2119 TRANSFER (ta, 1);
2120 return 1;
2121 }
2122 else
2123 return 0;
2124}
2125
2126static void
2127api_trace (pTHX_ SV *coro_sv, int flags)
2128{
2129 struct coro *coro = SvSTATE (coro_sv);
2130
2131 if (coro->flags & CF_RUNNING)
2132 croak ("cannot enable tracing on a running coroutine, caught");
2133
2134 if (flags & CC_TRACE)
2135 {
2136 if (!coro->cctx)
2137 coro->cctx = cctx_new_run ();
2138 else if (!(coro->cctx->flags & CC_TRACE))
2139 croak ("cannot enable tracing on coroutine with custom stack, caught");
2140
2141 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2142 }
2143 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2144 {
2145 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2146
2147 if (coro->flags & CF_RUNNING)
2148 PL_runops = RUNOPS_DEFAULT;
2149 else
2150 coro->slot->runops = RUNOPS_DEFAULT;
2151 }
2152}
2153
2154static void
2155coro_push_av (pTHX_ AV *av, I32 gimme_v)
2156{
2157 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2158 {
2159 dSP;
2160
2161 if (gimme_v == G_SCALAR)
2162 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2163 else
2164 {
2165 int i;
2166 EXTEND (SP, AvFILLp (av) + 1);
2167
2168 for (i = 0; i <= AvFILLp (av); ++i)
2169 PUSHs (AvARRAY (av)[i]);
2170 }
2171
2172 PUTBACK;
2173 }
2174}
2175
2176static void
2177coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2178{
2179 if (!coro->on_destroy)
2180 coro->on_destroy = newAV ();
2181
2182 av_push (coro->on_destroy, cb);
2183}
2184
2185static void
2186slf_destroy_join (pTHX_ struct CoroSLF *frame)
2187{
2188 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2189}
2190
2191static int
2192slf_check_join (pTHX_ struct CoroSLF *frame)
2193{
2194 struct coro *coro = (struct coro *)frame->data;
2195
2196 if (!coro->status)
2197 return 1;
2198
2199 frame->destroy = 0;
2200
2201 coro_push_av (aTHX_ coro->status, GIMME_V);
2202
2203 SvREFCNT_dec ((SV *)coro->hv);
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2212
2213 if (items > 1)
2214 croak ("join called with too many arguments");
2215
2216 if (coro->status)
2217 frame->prepare = prepare_nop;
2218 else
2219 {
2220 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2221 frame->prepare = prepare_schedule;
2222 }
2223
2224 frame->check = slf_check_join;
2225 frame->destroy = slf_destroy_join;
2226 frame->data = (void *)coro;
2227 SvREFCNT_inc (coro->hv);
2228}
2229
2230static void
2231coro_call_on_destroy (pTHX_ struct coro *coro)
2232{
2233 AV *od = coro->on_destroy;
2234
2235 if (!od)
2236 return;
2237
2238 coro->on_destroy = 0;
2239 sv_2mortal ((SV *)od);
2240
2241 while (AvFILLp (od) >= 0)
2242 {
2243 SV *cb = sv_2mortal (av_pop (od));
2244
2245 /* coro hv's (and only hv's at the moment) are supported as well */
2246 if (SvSTATEhv_p (aTHX_ cb))
2247 api_ready (aTHX_ cb);
2248 else
2249 {
2250 dSP; /* don't disturb outer sp */
2251 PUSHMARK (SP);
2252
2253 if (coro->status)
2254 {
2255 PUTBACK;
2256 coro_push_av (aTHX_ coro->status, G_ARRAY);
2257 SPAGAIN;
2258 }
2259
2260 PUTBACK;
2261 call_sv (cb, G_VOID | G_DISCARD);
2262 }
2263 }
2264}
2265
2266static void
2267coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2268{
2269 AV *av;
2270
2271 if (coro->status)
2272 {
2273 av = coro->status;
2274 av_clear (av);
2275 }
2276 else
2277 av = coro->status = newAV ();
2278
2279 /* items are actually not so common, so optimise for this case */
2280 if (items)
2281 {
2282 int i;
2283
2284 av_extend (av, items - 1);
2285
2286 for (i = 0; i < items; ++i)
2287 av_push (av, SvREFCNT_inc_NN (arg [i]));
2288 }
2289}
2290
2291static void
2292slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2293{
2294 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2295 api_ready (aTHX_ sv_manager);
2296
2297 frame->prepare = prepare_schedule;
2298 frame->check = slf_check_repeat;
2299
2300 /* as a minor optimisation, we could unwind all stacks here */
2301 /* but that puts extra pressure on pp_slf, and is not worth much */
2302 /*coro_unwind_stacks (aTHX);*/
2303}
2304
2305static void
2306slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2307{
2308 HV *coro_hv = (HV *)SvRV (coro_current);
2309
2310 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2311 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2312}
2313
2314static void
2315slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 HV *coro_hv;
2318 struct coro *coro;
2319
2320 if (items <= 0)
2321 croak ("Coro::cancel called without coro object,");
2322
2323 coro = SvSTATE (arg [0]);
2324 coro_hv = coro->hv;
2325
2326 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2327
2328 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2329 {
2330 /* coro currently busy cancelling something, so just notify it */
2331 coro->slf_frame.data = (void *)coro;
2332
2333 frame->prepare = prepare_nop;
2334 frame->check = slf_check_nop;
2335 }
2336 else if (coro_hv == (HV *)SvRV (coro_current))
2337 {
2338 /* cancelling the current coro is allowed, and equals terminate */
2339 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2340 }
2341 else
2342 {
2343 struct coro *self = SvSTATE_current;
2344
2345 if (!self)
2346 croak ("Coro::cancel called outside of thread content,");
2347
2348 /* otherwise we cancel directly, purely for speed reasons
2349 * unfortunately, this requires some magic trickery, as
2350 * somebody else could cancel us, so we have to fight the cancellation.
2351 * this is ugly, and hopefully fully worth the extra speed.
2352 * besides, I can't get the slow-but-safe version working...
2353 */
2354 slf_frame.data = 0;
2355 self->flags |= CF_NOCANCEL;
2356 coro_state_destroy (aTHX_ coro);
2357 self->flags &= ~CF_NOCANCEL;
2358
2359 if (slf_frame.data)
2360 {
2361 /* while we were busy we have been cancelled, so terminate */
2362 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2363 }
2364 else
2365 {
2366 frame->prepare = prepare_nop;
2367 frame->check = slf_check_nop;
2368 }
2369 }
2370}
2371
2372static int
2373slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2374{
2375 frame->prepare = 0;
2376 coro_unwind_stacks (aTHX);
2377
2378 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2379
2380 return 1;
2381}
2382
2383static int
2384safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2385{
2386 if (coro->cctx)
2387 croak ("coro inside C callback, unable to cancel at this time, caught");
2388
2389 if (coro->flags & CF_NEW)
2390 {
2391 coro_set_status (aTHX_ coro, arg, items);
2392 coro_state_destroy (aTHX_ coro);
2393 }
2394 else
2395 {
2396 if (!coro->slf_frame.prepare)
2397 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2398
2399 slf_destroy (aTHX_ coro);
2400
2401 coro_set_status (aTHX_ coro, arg, items);
2402 coro->slf_frame.prepare = prepare_nop;
2403 coro->slf_frame.check = slf_check_safe_cancel;
2404
2405 api_ready (aTHX_ (SV *)coro->hv);
2406 }
2407
2408 return 1;
2409}
2410
855/** Coro ********************************************************************/ 2411/*****************************************************************************/
2412/* async pool handler */
856 2413
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 2414static int
870coro_enq (pTHX_ SV *sv) 2415slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2416{
872 SV **xprio; 2417 HV *hv = (HV *)SvRV (coro_current);
873 int prio; 2418 struct coro *coro = (struct coro *)frame->data;
874 2419
2420 if (!coro->invoke_cb)
2421 return 1; /* loop till we have invoke */
2422 else
2423 {
2424 hv_store (hv, "desc", sizeof ("desc") - 1,
2425 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2426
2427 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2428
2429 {
2430 dSP;
2431 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2432 PUTBACK;
2433 }
2434
2435 SvREFCNT_dec (GvAV (PL_defgv));
2436 GvAV (PL_defgv) = coro->invoke_av;
2437 coro->invoke_av = 0;
2438
2439 return 0;
2440 }
2441}
2442
2443static void
2444slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2445{
2446 HV *hv = (HV *)SvRV (coro_current);
2447 struct coro *coro = SvSTATE_hv ((SV *)hv);
2448
2449 if (ecb_expect_true (coro->saved_deffh))
2450 {
2451 /* subsequent iteration */
2452 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2453 coro->saved_deffh = 0;
2454
2455 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2456 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2457 {
2458 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2459 return;
2460 }
2461 else
2462 {
2463 av_clear (GvAV (PL_defgv));
2464 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2465
2466 if (ecb_expect_false (coro->swap_sv))
2467 {
2468 swap_svs_leave (coro);
2469 SvREFCNT_dec_NN (coro->swap_sv);
2470 coro->swap_sv = 0;
2471 }
2472
2473 coro->prio = 0;
2474
2475 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2476 api_trace (aTHX_ coro_current, 0);
2477
2478 frame->prepare = prepare_schedule;
2479 av_push (av_async_pool, SvREFCNT_inc (hv));
2480 }
2481 }
2482 else
2483 {
2484 /* first iteration, simply fall through */
2485 frame->prepare = prepare_nop;
2486 }
2487
2488 frame->check = slf_check_pool_handler;
2489 frame->data = (void *)coro;
2490}
2491
2492/*****************************************************************************/
2493/* rouse callback */
2494
2495#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2496
2497static void
2498coro_rouse_callback (pTHX_ CV *cv)
2499{
2500 dXSARGS;
2501 SV *data = (SV *)S_GENSUB_ARG;
2502
875 if (SvTYPE (sv) != SVt_PVHV) 2503 if (SvTYPE (SvRV (data)) != SVt_PVAV)
876 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2504 {
2505 /* first call, set args */
2506 SV *coro = SvRV (data);
2507 AV *av = newAV ();
877 2508
878 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2509 SvRV_set (data, (SV *)av);
879 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880 2510
881 prio = prio > PRIO_MAX ? PRIO_MAX 2511 /* better take a full copy of the arguments */
882 : prio < PRIO_MIN ? PRIO_MIN 2512 while (items--)
883 : prio; 2513 av_store (av, items, newSVsv (ST (items)));
884 2514
885 av_push (coro_ready [prio - PRIO_MIN], sv); 2515 api_ready (aTHX_ coro);
886 coro_nready++; 2516 SvREFCNT_dec (coro);
2517 }
2518
2519 XSRETURN_EMPTY;
2520}
2521
2522static int
2523slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2524{
2525 SV *data = (SV *)frame->data;
2526
2527 if (CORO_THROW)
2528 return 0;
2529
2530 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2531 return 1;
2532
2533 /* now push all results on the stack */
2534 {
2535 dSP;
2536 AV *av = (AV *)SvRV (data);
2537 int i;
2538
2539 EXTEND (SP, AvFILLp (av) + 1);
2540 for (i = 0; i <= AvFILLp (av); ++i)
2541 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2542
2543 /* we have stolen the elements, so set length to zero and free */
2544 AvFILLp (av) = -1;
2545 av_undef (av);
2546
2547 PUTBACK;
2548 }
2549
2550 return 0;
2551}
2552
2553static void
2554slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2555{
2556 SV *cb;
2557
2558 if (items)
2559 cb = arg [0];
2560 else
2561 {
2562 struct coro *coro = SvSTATE_current;
2563
2564 if (!coro->rouse_cb)
2565 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2566
2567 cb = sv_2mortal (coro->rouse_cb);
2568 coro->rouse_cb = 0;
2569 }
2570
2571 if (!SvROK (cb)
2572 || SvTYPE (SvRV (cb)) != SVt_PVCV
2573 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2574 croak ("Coro::rouse_wait called with illegal callback argument,");
2575
2576 {
2577 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2578 SV *data = (SV *)S_GENSUB_ARG;
2579
2580 frame->data = (void *)data;
2581 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2582 frame->check = slf_check_rouse_wait;
2583 }
887} 2584}
888 2585
889static SV * 2586static SV *
890coro_deq (pTHX_ int min_prio) 2587coro_new_rouse_cb (pTHX)
891{ 2588{
892 int prio = PRIO_MAX - PRIO_MIN; 2589 HV *hv = (HV *)SvRV (coro_current);
2590 struct coro *coro = SvSTATE_hv (hv);
2591 SV *data = newRV_inc ((SV *)hv);
2592 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
893 2593
894 min_prio -= PRIO_MIN; 2594 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
895 if (min_prio < 0) 2595 SvREFCNT_dec (data); /* magicext increases the refcount */
896 min_prio = 0;
897 2596
898 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2597 SvREFCNT_dec (coro->rouse_cb);
899 if (av_len (coro_ready[prio]) >= 0) 2598 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2599
2600 return cb;
2601}
2602
2603/*****************************************************************************/
2604/* schedule-like-function opcode (SLF) */
2605
2606static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2607static const CV *slf_cv;
2608static SV **slf_argv;
2609static int slf_argc, slf_arga; /* count, allocated */
2610static I32 slf_ax; /* top of stack, for restore */
2611
2612/* this restores the stack in the case we patched the entersub, to */
2613/* recreate the stack frame as perl will on following calls */
2614/* since entersub cleared the stack */
2615static OP *
2616pp_restore (pTHX)
2617{
2618 int i;
2619 SV **SP = PL_stack_base + slf_ax;
2620
2621 PUSHMARK (SP);
2622
2623 EXTEND (SP, slf_argc + 1);
2624
2625 for (i = 0; i < slf_argc; ++i)
2626 PUSHs (sv_2mortal (slf_argv [i]));
2627
2628 PUSHs ((SV *)CvGV (slf_cv));
2629
2630 RETURNOP (slf_restore.op_first);
2631}
2632
2633static void
2634slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2635{
2636 SV **arg = (SV **)slf_frame.data;
2637
2638 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2639}
2640
2641static void
2642slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2643{
2644 if (items != 2)
2645 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2646
2647 frame->prepare = slf_prepare_transfer;
2648 frame->check = slf_check_nop;
2649 frame->data = (void *)arg; /* let's hope it will stay valid */
2650}
2651
2652static void
2653slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2654{
2655 frame->prepare = prepare_schedule;
2656 frame->check = slf_check_nop;
2657}
2658
2659static void
2660slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2661{
2662 struct coro *next = (struct coro *)slf_frame.data;
2663
2664 SvREFCNT_inc_NN (next->hv);
2665 prepare_schedule_to (aTHX_ ta, next);
2666}
2667
2668static void
2669slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2670{
2671 if (!items)
2672 croak ("Coro::schedule_to expects a coroutine argument, caught");
2673
2674 frame->data = (void *)SvSTATE (arg [0]);
2675 frame->prepare = slf_prepare_schedule_to;
2676 frame->check = slf_check_nop;
2677}
2678
2679static void
2680slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2681{
2682 api_ready (aTHX_ SvRV (coro_current));
2683
2684 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2685}
2686
2687static void
2688slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2689{
2690 frame->prepare = prepare_cede;
2691 frame->check = slf_check_nop;
2692}
2693
2694static void
2695slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2696{
2697 frame->prepare = prepare_cede_notself;
2698 frame->check = slf_check_nop;
2699}
2700
2701/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2702static void
2703slf_destroy (pTHX_ struct coro *coro)
2704{
2705 struct CoroSLF frame = coro->slf_frame;
2706
2707 /*
2708 * The on_destroy below most likely is from an SLF call.
2709 * Since by definition the SLF call will not finish when we destroy
2710 * the coro, we will have to force-finish it here, otherwise
2711 * cleanup functions cannot call SLF functions.
2712 */
2713 coro->slf_frame.prepare = 0;
2714
2715 /* this callback is reserved for slf functions needing to do cleanup */
2716 if (frame.destroy && frame.prepare && !PL_dirty)
2717 frame.destroy (aTHX_ &frame);
2718}
2719
2720/*
2721 * these not obviously related functions are all rolled into one
2722 * function to increase chances that they all will call transfer with the same
2723 * stack offset
2724 * SLF stands for "schedule-like-function".
2725 */
2726static OP *
2727pp_slf (pTHX)
2728{
2729 I32 checkmark; /* mark SP to see how many elements check has pushed */
2730
2731 /* set up the slf frame, unless it has already been set-up */
2732 /* the latter happens when a new coro has been started */
2733 /* or when a new cctx was attached to an existing coroutine */
2734 if (ecb_expect_true (!slf_frame.prepare))
2735 {
2736 /* first iteration */
2737 dSP;
2738 SV **arg = PL_stack_base + TOPMARK + 1;
2739 int items = SP - arg; /* args without function object */
2740 SV *gv = *sp;
2741
2742 /* do a quick consistency check on the "function" object, and if it isn't */
2743 /* for us, divert to the real entersub */
2744 if (SvTYPE (gv) != SVt_PVGV
2745 || !GvCV (gv)
2746 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2747 return PL_ppaddr[OP_ENTERSUB](aTHX);
2748
2749 if (!(PL_op->op_flags & OPf_STACKED))
2750 {
2751 /* ampersand-form of call, use @_ instead of stack */
2752 AV *av = GvAV (PL_defgv);
2753 arg = AvARRAY (av);
2754 items = AvFILLp (av) + 1;
2755 }
2756
2757 /* now call the init function, which needs to set up slf_frame */
2758 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2759 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2760
2761 /* pop args */
2762 SP = PL_stack_base + POPMARK;
2763
2764 PUTBACK;
2765 }
2766
2767 /* now that we have a slf_frame, interpret it! */
2768 /* we use a callback system not to make the code needlessly */
2769 /* complicated, but so we can run multiple perl coros from one cctx */
2770
2771 do
2772 {
2773 struct coro_transfer_args ta;
2774
2775 slf_frame.prepare (aTHX_ &ta);
2776 TRANSFER (ta, 0);
2777
2778 checkmark = PL_stack_sp - PL_stack_base;
2779 }
2780 while (slf_frame.check (aTHX_ &slf_frame));
2781
2782 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2783
2784 /* exception handling */
2785 if (ecb_expect_false (CORO_THROW))
2786 {
2787 SV *exception = sv_2mortal (CORO_THROW);
2788
2789 CORO_THROW = 0;
2790 sv_setsv (ERRSV, exception);
2791 croak (0);
2792 }
2793
2794 /* return value handling - mostly like entersub */
2795 /* make sure we put something on the stack in scalar context */
2796 if (GIMME_V == G_SCALAR
2797 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2798 {
2799 dSP;
2800 SV **bot = PL_stack_base + checkmark;
2801
2802 if (sp == bot) /* too few, push undef */
2803 bot [1] = &PL_sv_undef;
2804 else /* too many, take last one */
2805 bot [1] = *sp;
2806
2807 SP = bot + 1;
2808
2809 PUTBACK;
2810 }
2811
2812 return NORMAL;
2813}
2814
2815static void
2816api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2817{
2818 int i;
2819 SV **arg = PL_stack_base + ax;
2820 int items = PL_stack_sp - arg + 1;
2821
2822 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2823
2824 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2825 && PL_op->op_ppaddr != pp_slf)
2826 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2827
2828 CvFLAGS (cv) |= CVf_SLF;
2829 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2830 slf_cv = cv;
2831
2832 /* we patch the op, and then re-run the whole call */
2833 /* we have to put the same argument on the stack for this to work */
2834 /* and this will be done by pp_restore */
2835 slf_restore.op_next = (OP *)&slf_restore;
2836 slf_restore.op_type = OP_CUSTOM;
2837 slf_restore.op_ppaddr = pp_restore;
2838 slf_restore.op_first = PL_op;
2839
2840 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2841
2842 if (PL_op->op_flags & OPf_STACKED)
2843 {
2844 if (items > slf_arga)
2845 {
2846 slf_arga = items;
2847 Safefree (slf_argv);
2848 New (0, slf_argv, slf_arga, SV *);
2849 }
2850
2851 slf_argc = items;
2852
2853 for (i = 0; i < items; ++i)
2854 slf_argv [i] = SvREFCNT_inc (arg [i]);
2855 }
2856 else
2857 slf_argc = 0;
2858
2859 PL_op->op_ppaddr = pp_slf;
2860 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2861
2862 PL_op = (OP *)&slf_restore;
2863}
2864
2865/*****************************************************************************/
2866/* dynamic wind */
2867
2868static void
2869on_enterleave_call (pTHX_ SV *cb)
2870{
2871 dSP;
2872
2873 PUSHSTACK;
2874
2875 PUSHMARK (SP);
2876 PUTBACK;
2877 call_sv (cb, G_VOID | G_DISCARD);
2878 SPAGAIN;
2879
2880 POPSTACK;
2881}
2882
2883static SV *
2884coro_avp_pop_and_free (pTHX_ AV **avp)
2885{
2886 AV *av = *avp;
2887 SV *res = av_pop (av);
2888
2889 if (AvFILLp (av) < 0)
2890 {
2891 *avp = 0;
2892 SvREFCNT_dec (av);
2893 }
2894
2895 return res;
2896}
2897
2898static void
2899coro_pop_on_enter (pTHX_ void *coro)
2900{
2901 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2902 SvREFCNT_dec (cb);
2903}
2904
2905static void
2906coro_pop_on_leave (pTHX_ void *coro)
2907{
2908 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2909 on_enterleave_call (aTHX_ sv_2mortal (cb));
2910}
2911
2912static void
2913enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2914{
2915 if (!hook)
2916 return;
2917
2918 if (!*avp)
2919 {
2920 *avp = newAV ();
2921 AvREAL_off (*avp);
2922 }
2923
2924 av_push (*avp, (SV *)hook);
2925 av_push (*avp, (SV *)arg);
2926}
2927
2928static void
2929enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2930{
2931 AV *av = *avp;
2932 int i;
2933
2934 if (!av)
2935 return;
2936
2937 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2938 if (AvARRAY (av)[i] == (SV *)hook)
900 { 2939 {
901 coro_nready--; 2940 if (execute)
902 return av_shift (coro_ready[prio]); 2941 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2942
2943 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2944 av_pop (av);
2945 av_pop (av);
2946 break;
903 } 2947 }
904 2948
2949 if (AvFILLp (av) >= 0)
2950 {
2951 *avp = 0;
2952 SvREFCNT_dec_NN (av);
2953 }
2954}
2955
2956static void
2957api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2958{
2959 struct coro *coro = SvSTATE (coro_sv);
2960
2961 if (SvSTATE_current == coro)
2962 if (enter)
2963 enter (aTHX_ enter_arg);
2964
2965 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2966 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2967}
2968
2969static void
2970api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2971{
2972 struct coro *coro = SvSTATE (coro_sv);
2973
2974 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2975 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2976}
2977
2978static void
2979savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2980{
2981 struct coro *coro = SvSTATE_current;
2982
2983 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2984}
2985
2986static void
2987savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2988{
2989 struct coro *coro = SvSTATE_current;
2990
2991 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2992}
2993
2994static void
2995api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2996{
2997 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2998
2999 /* this ought to be much cheaper than malloc + a single destructor call */
3000 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
3001 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
3002}
3003
3004/*****************************************************************************/
3005/* PerlIO::cede */
3006
3007typedef struct
3008{
3009 PerlIOBuf base;
3010 NV next, every;
3011} PerlIOCede;
3012
3013static IV ecb_cold
3014PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3015{
3016 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3017
3018 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
3019 self->next = nvtime () + self->every;
3020
3021 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
3022}
3023
3024static SV * ecb_cold
3025PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3026{
3027 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3028
3029 return newSVnv (self->every);
3030}
3031
3032static IV
3033PerlIOCede_flush (pTHX_ PerlIO *f)
3034{
3035 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3036 double now = nvtime ();
3037
3038 if (now >= self->next)
3039 {
3040 api_cede (aTHX);
3041 self->next = now + self->every;
3042 }
3043
3044 return PerlIOBuf_flush (aTHX_ f);
3045}
3046
3047static PerlIO_funcs PerlIO_cede =
3048{
3049 sizeof(PerlIO_funcs),
3050 "cede",
3051 sizeof(PerlIOCede),
3052 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3053 PerlIOCede_pushed,
3054 PerlIOBuf_popped,
3055 PerlIOBuf_open,
3056 PerlIOBase_binmode,
3057 PerlIOCede_getarg,
3058 PerlIOBase_fileno,
3059 PerlIOBuf_dup,
3060 PerlIOBuf_read,
3061 PerlIOBuf_unread,
3062 PerlIOBuf_write,
3063 PerlIOBuf_seek,
3064 PerlIOBuf_tell,
3065 PerlIOBuf_close,
3066 PerlIOCede_flush,
3067 PerlIOBuf_fill,
3068 PerlIOBase_eof,
3069 PerlIOBase_error,
3070 PerlIOBase_clearerr,
3071 PerlIOBase_setlinebuf,
3072 PerlIOBuf_get_base,
3073 PerlIOBuf_bufsiz,
3074 PerlIOBuf_get_ptr,
3075 PerlIOBuf_get_cnt,
3076 PerlIOBuf_set_ptrcnt,
3077};
3078
3079/*****************************************************************************/
3080/* Coro::Semaphore & Coro::Signal */
3081
3082static SV *
3083coro_waitarray_new (pTHX_ int count)
3084{
3085 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3086 AV *av = newAV ();
3087 SV **ary;
3088
3089 /* unfortunately, building manually saves memory */
3090 Newx (ary, 2, SV *);
3091 AvALLOC (av) = ary;
3092#if PERL_VERSION_ATLEAST (5,10,0)
3093 AvARRAY (av) = ary;
3094#else
3095 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3096 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3097 SvPVX ((SV *)av) = (char *)ary;
3098#endif
3099 AvMAX (av) = 1;
3100 AvFILLp (av) = 0;
3101 ary [0] = newSViv (count);
3102
3103 return newRV_noinc ((SV *)av);
3104}
3105
3106/* semaphore */
3107
3108static void
3109coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3110{
3111 SV *count_sv = AvARRAY (av)[0];
3112 IV count = SvIVX (count_sv);
3113
3114 count += adjust;
3115 SvIVX (count_sv) = count;
3116
3117 /* now wake up as many waiters as are expected to lock */
3118 while (count > 0 && AvFILLp (av) > 0)
3119 {
3120 SV *cb;
3121
3122 /* swap first two elements so we can shift a waiter */
3123 AvARRAY (av)[0] = AvARRAY (av)[1];
3124 AvARRAY (av)[1] = count_sv;
3125 cb = av_shift (av);
3126
3127 if (SvOBJECT (cb))
3128 {
3129 api_ready (aTHX_ cb);
3130 --count;
3131 }
3132 else if (SvTYPE (cb) == SVt_PVCV)
3133 {
3134 dSP;
3135 PUSHMARK (SP);
3136 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3137 PUTBACK;
3138 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3139 }
3140
3141 SvREFCNT_dec_NN (cb);
3142 }
3143}
3144
3145static void
3146coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3147{
3148 /* call $sem->adjust (0) to possibly wake up some other waiters */
3149 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3150}
3151
3152static int
3153slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3154{
3155 AV *av = (AV *)frame->data;
3156 SV *count_sv = AvARRAY (av)[0];
3157 SV *coro_hv = SvRV (coro_current);
3158
3159 frame->destroy = 0;
3160
3161 /* if we are about to throw, don't actually acquire the lock, just throw */
3162 if (ecb_expect_false (CORO_THROW))
3163 {
3164 /* we still might be responsible for the semaphore, so wake up others */
3165 coro_semaphore_adjust (aTHX_ av, 0);
3166
3167 return 0;
3168 }
3169 else if (SvIVX (count_sv) > 0)
3170 {
3171 if (acquire)
3172 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3173 else
3174 coro_semaphore_adjust (aTHX_ av, 0);
3175
3176 return 0;
3177 }
3178 else
3179 {
3180 int i;
3181 /* if we were woken up but can't down, we look through the whole */
3182 /* waiters list and only add us if we aren't in there already */
3183 /* this avoids some degenerate memory usage cases */
3184 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3185 if (AvARRAY (av)[i] == coro_hv)
3186 return 1;
3187
3188 av_push (av, SvREFCNT_inc (coro_hv));
3189 return 1;
3190 }
3191}
3192
3193static int
3194slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3195{
3196 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3197}
3198
3199static int
3200slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3201{
3202 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3203}
3204
3205static void
3206slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3207{
3208 AV *av = (AV *)SvRV (arg [0]);
3209
3210 if (SvIVX (AvARRAY (av)[0]) > 0)
3211 {
3212 frame->data = (void *)av;
3213 frame->prepare = prepare_nop;
3214 }
3215 else
3216 {
3217 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3218
3219 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3220 frame->prepare = prepare_schedule;
3221 /* to avoid race conditions when a woken-up coro gets terminated */
3222 /* we arrange for a temporary on_destroy that calls adjust (0) */
3223 frame->destroy = coro_semaphore_destroy;
3224 }
3225}
3226
3227static void
3228slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3229{
3230 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3231 frame->check = slf_check_semaphore_down;
3232}
3233
3234static void
3235slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3236{
3237 if (items >= 2)
3238 {
3239 /* callback form */
3240 AV *av = (AV *)SvRV (arg [0]);
3241 SV *cb_cv = s_get_cv_croak (arg [1]);
3242
3243 av_push (av, SvREFCNT_inc_NN (cb_cv));
3244
3245 if (SvIVX (AvARRAY (av)[0]) > 0)
3246 coro_semaphore_adjust (aTHX_ av, 0);
3247
3248 frame->prepare = prepare_nop;
3249 frame->check = slf_check_nop;
3250 }
3251 else
3252 {
3253 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3254 frame->check = slf_check_semaphore_wait;
3255 }
3256}
3257
3258/* signal */
3259
3260static void
3261coro_signal_wake (pTHX_ AV *av, int count)
3262{
3263 SvIVX (AvARRAY (av)[0]) = 0;
3264
3265 /* now signal count waiters */
3266 while (count > 0 && AvFILLp (av) > 0)
3267 {
3268 SV *cb;
3269
3270 /* swap first two elements so we can shift a waiter */
3271 cb = AvARRAY (av)[0];
3272 AvARRAY (av)[0] = AvARRAY (av)[1];
3273 AvARRAY (av)[1] = cb;
3274
3275 cb = av_shift (av);
3276
3277 if (SvTYPE (cb) == SVt_PVCV)
3278 {
3279 dSP;
3280 PUSHMARK (SP);
3281 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3282 PUTBACK;
3283 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3284 }
3285 else
3286 {
3287 api_ready (aTHX_ cb);
3288 sv_setiv (cb, 0); /* signal waiter */
3289 }
3290
3291 SvREFCNT_dec_NN (cb);
3292
3293 --count;
3294 }
3295}
3296
3297static int
3298slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3299{
3300 /* if we are about to throw, also stop waiting */
3301 return SvROK ((SV *)frame->data) && !CORO_THROW;
3302}
3303
3304static void
3305slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3306{
3307 AV *av = (AV *)SvRV (arg [0]);
3308
3309 if (items >= 2)
3310 {
3311 SV *cb_cv = s_get_cv_croak (arg [1]);
3312 av_push (av, SvREFCNT_inc_NN (cb_cv));
3313
3314 if (SvIVX (AvARRAY (av)[0]))
3315 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3316
3317 frame->prepare = prepare_nop;
3318 frame->check = slf_check_nop;
3319 }
3320 else if (SvIVX (AvARRAY (av)[0]))
3321 {
3322 SvIVX (AvARRAY (av)[0]) = 0;
3323 frame->prepare = prepare_nop;
3324 frame->check = slf_check_nop;
3325 }
3326 else
3327 {
3328 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3329
3330 av_push (av, waiter);
3331
3332 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3333 frame->prepare = prepare_schedule;
3334 frame->check = slf_check_signal_wait;
3335 }
3336}
3337
3338/*****************************************************************************/
3339/* Coro::AIO */
3340
3341#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3342
3343/* helper storage struct */
3344struct io_state
3345{
3346 int errorno;
3347 I32 laststype; /* U16 in 5.10.0 */
3348 int laststatval;
3349 Stat_t statcache;
3350};
3351
3352static void
3353coro_aio_callback (pTHX_ CV *cv)
3354{
3355 dXSARGS;
3356 AV *state = (AV *)S_GENSUB_ARG;
3357 SV *coro = av_pop (state);
3358 SV *data_sv = newSV (sizeof (struct io_state));
3359
3360 av_extend (state, items - 1);
3361
3362 sv_upgrade (data_sv, SVt_PV);
3363 SvCUR_set (data_sv, sizeof (struct io_state));
3364 SvPOK_only (data_sv);
3365
3366 {
3367 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3368
3369 data->errorno = errno;
3370 data->laststype = PL_laststype;
3371 data->laststatval = PL_laststatval;
3372 data->statcache = PL_statcache;
3373 }
3374
3375 /* now build the result vector out of all the parameters and the data_sv */
3376 {
3377 int i;
3378
3379 for (i = 0; i < items; ++i)
3380 av_push (state, SvREFCNT_inc_NN (ST (i)));
3381 }
3382
3383 av_push (state, data_sv);
3384
3385 api_ready (aTHX_ coro);
3386 SvREFCNT_dec_NN (coro);
3387 SvREFCNT_dec_NN ((AV *)state);
3388}
3389
3390static int
3391slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3392{
3393 AV *state = (AV *)frame->data;
3394
3395 /* if we are about to throw, return early */
3396 /* this does not cancel the aio request, but at least */
3397 /* it quickly returns */
3398 if (CORO_THROW)
3399 return 0;
3400
3401 /* one element that is an RV? repeat! */
3402 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3403 return 1;
3404
3405 /* restore status */
3406 {
3407 SV *data_sv = av_pop (state);
3408 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3409
3410 errno = data->errorno;
3411 PL_laststype = data->laststype;
3412 PL_laststatval = data->laststatval;
3413 PL_statcache = data->statcache;
3414
3415 SvREFCNT_dec_NN (data_sv);
3416 }
3417
3418 /* push result values */
3419 {
3420 dSP;
3421 int i;
3422
3423 EXTEND (SP, AvFILLp (state) + 1);
3424 for (i = 0; i <= AvFILLp (state); ++i)
3425 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3426
3427 PUTBACK;
3428 }
3429
905 return 0; 3430 return 0;
906} 3431}
907 3432
908static void 3433static void
909api_ready (SV *coro) 3434slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
910{ 3435{
911 dTHX; 3436 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
912
913 if (SvROK (coro))
914 coro = SvRV (coro);
915
916 LOCK;
917 coro_enq (aTHX_ SvREFCNT_inc (coro));
918 UNLOCK;
919}
920
921static void
922api_schedule (void)
923{
924 dTHX;
925
926 SV *prev, *next;
927
928 LOCK;
929
930 prev = SvRV (GvSV (coro_current)); 3437 SV *coro_hv = SvRV (coro_current);
931 next = coro_deq (aTHX_ PRIO_MIN); 3438 struct coro *coro = SvSTATE_hv (coro_hv);
932 3439
933 if (!next) 3440 /* put our coroutine id on the state arg */
934 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3441 av_push (state, SvREFCNT_inc_NN (coro_hv));
935 3442
936 /* free this only after the transfer */ 3443 /* first see whether we have a non-zero priority and set it as AIO prio */
937 coro_mortal = prev; 3444 if (coro->prio)
938 SV_CORO (prev, "Coro::schedule"); 3445 {
3446 dSP;
939 3447
940 SvRV (GvSV (coro_current)) = next; 3448 static SV *prio_cv;
3449 static SV *prio_sv;
941 3450
942 SV_CORO (next, "Coro::schedule"); 3451 if (ecb_expect_false (!prio_cv))
3452 {
3453 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3454 prio_sv = newSViv (0);
3455 }
943 3456
944 UNLOCK; 3457 PUSHMARK (SP);
3458 sv_setiv (prio_sv, coro->prio);
3459 XPUSHs (prio_sv);
945 3460
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3461 PUTBACK;
947 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3462 call_sv (prio_cv, G_VOID | G_DISCARD);
948} 3463 }
949 3464
950static void 3465 /* now call the original request */
951api_cede (void) 3466 {
952{ 3467 dSP;
953 dTHX; 3468 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3469 int i;
954 3470
955 LOCK; 3471 PUSHMARK (SP);
956 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
957 UNLOCK;
958 3472
959 api_schedule (); 3473 /* first push all args to the stack */
960} 3474 EXTEND (SP, items + 1);
961 3475
3476 for (i = 0; i < items; ++i)
3477 PUSHs (arg [i]);
3478
3479 /* now push the callback closure */
3480 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3481
3482 /* now call the AIO function - we assume our request is uncancelable */
3483 PUTBACK;
3484 call_sv ((SV *)req, G_VOID | G_DISCARD);
3485 }
3486
3487 /* now that the request is going, we loop till we have a result */
3488 frame->data = (void *)state;
3489 frame->prepare = prepare_schedule;
3490 frame->check = slf_check_aio_req;
3491}
3492
3493static void
3494coro_aio_req_xs (pTHX_ CV *cv)
3495{
3496 dXSARGS;
3497
3498 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3499
3500 XSRETURN_EMPTY;
3501}
3502
3503/*****************************************************************************/
3504
3505#if CORO_CLONE
3506# include "clone.c"
3507#endif
3508
3509/*****************************************************************************/
3510
3511static SV *
3512coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3513{
3514 SV *coro_sv;
3515 struct coro *coro;
3516 MAGIC *mg;
3517 HV *hv;
3518 SV *cb;
3519 int i;
3520
3521 if (argc > 0)
3522 {
3523 cb = s_get_cv_croak (argv [0]);
3524
3525 if (!is_coro)
3526 {
3527 if (CvISXSUB (cb))
3528 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3529
3530 if (!CvROOT (cb))
3531 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3532 }
3533 }
3534
3535 Newz (0, coro, 1, struct coro);
3536 coro->args = newAV ();
3537 coro->flags = CF_NEW;
3538
3539 if (coro_first) coro_first->prev = coro;
3540 coro->next = coro_first;
3541 coro_first = coro;
3542
3543 coro->hv = hv = newHV ();
3544 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3545 mg->mg_flags |= MGf_DUP;
3546 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3547
3548 if (argc > 0)
3549 {
3550 av_extend (coro->args, argc + is_coro - 1);
3551
3552 if (is_coro)
3553 {
3554 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3555 cb = (SV *)cv_coro_run;
3556 }
3557
3558 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3559
3560 for (i = 1; i < argc; i++)
3561 av_push (coro->args, newSVsv (argv [i]));
3562 }
3563
3564 return coro_sv;
3565}
3566
3567#ifndef __cplusplus
3568ecb_cold XS(boot_Coro__State);
3569#endif
3570
3571#if CORO_JIT
3572
3573static void ecb_noinline ecb_cold
3574pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3575{
3576 dSP;
3577 AV *av = newAV ();
3578
3579 av_store (av, 3, newSVuv (d));
3580 av_store (av, 2, newSVuv (c));
3581 av_store (av, 1, newSVuv (b));
3582 av_store (av, 0, newSVuv (a));
3583
3584 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3585
3586 PUTBACK;
3587}
3588
3589static void ecb_noinline ecb_cold
3590jit_init (pTHX)
3591{
3592 dSP;
3593 SV *load, *save;
3594 char *map_base;
3595 char *load_ptr, *save_ptr;
3596 STRLEN load_len, save_len, map_len;
3597 int count;
3598
3599 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3600
3601 PUSHMARK (SP);
3602 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3603 #include "state.h"
3604 count = call_pv ("Coro::State::_jit", G_ARRAY);
3605 SPAGAIN;
3606
3607 save = POPs; save_ptr = SvPVbyte (save, save_len);
3608 load = POPs; load_ptr = SvPVbyte (load, load_len);
3609
3610 map_len = load_len + save_len + 16;
3611
3612 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3613
3614 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3615
3616 load_perl_slots = (load_save_perl_slots_type)map_base;
3617 memcpy (map_base, load_ptr, load_len);
3618
3619 map_base += (load_len + 15) & ~15;
3620
3621 save_perl_slots = (load_save_perl_slots_type)map_base;
3622 memcpy (map_base, save_ptr, save_len);
3623
3624 /* we are good citizens and try to make the page read-only, so the evil evil */
3625 /* hackers might have it a bit more difficult */
3626 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3627
3628 PUTBACK;
3629 eval_pv ("undef &Coro::State::_jit", 1);
3630}
3631
3632#endif
3633
962MODULE = Coro::State PACKAGE = Coro::State 3634MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
963 3635
964PROTOTYPES: ENABLE 3636PROTOTYPES: DISABLE
965 3637
966BOOT: 3638BOOT:
967{ /* {} necessary for stoopid perl-5.6.x */ 3639{
3640#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3641#include "state.h"
968#ifdef USE_ITHREADS 3642#ifdef USE_ITHREADS
969 MUTEX_INIT (&coro_mutex); 3643# if CORO_PTHREAD
3644 coro_thx = PERL_GET_CONTEXT;
970#endif 3645# endif
3646#endif
3647 /* perl defines these to check for existance first, but why it doesn't */
3648 /* just create them one at init time is not clear to me, except for */
3649 /* programs trying to delete them, but... */
3650 /* anyway, we declare this as invalid and make sure they are initialised here */
3651 DEFSV;
3652 ERRSV;
971 3653
972 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3654 cctx_current = cctx_new_empty ();
973 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3655
3656 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3657 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3658
3659 {
3660 /*
3661 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3662 * by coro_sig_vtbl in hash values.
3663 */
3664 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3665
3666 /* this only works if perl doesn't have a vtbl for %SIG */
3667 assert (!mg->mg_virtual);
3668
3669 /*
3670 * The irony is that the perl API itself asserts that mg_virtual
3671 * must be non-const, yet perl5porters insisted on marking their
3672 * vtbls as read-only, just to thwart perl modules from patching
3673 * them.
3674 */
3675 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3676 mg->mg_flags |= MGf_COPY;
3677
3678 coro_sigelem_vtbl = PL_vtbl_sigelem;
3679 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3680 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3681 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3682 }
3683
3684 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3685 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3686
974 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3687 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975 3688
976 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3689 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
977 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3690 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
978 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3691 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
979 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3692 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
980 3693
981 main_mainstack = PL_mainstack; 3694 main_mainstack = PL_mainstack;
3695 main_top_env = PL_top_env;
982 3696
3697 while (main_top_env->je_prev)
3698 main_top_env = main_top_env->je_prev;
3699
3700 {
3701 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3702
3703 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3704 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3705
3706 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3707 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3708 }
3709
983 coroapi.ver = CORO_API_VERSION; 3710 coroapi.ver = CORO_API_VERSION;
3711 coroapi.rev = CORO_API_REVISION;
3712
984 coroapi.transfer = api_transfer; 3713 coroapi.transfer = api_transfer;
985}
986 3714
987Coro::State 3715 coroapi.sv_state = SvSTATE_;
988_newprocess(args) 3716 coroapi.execute_slf = api_execute_slf;
989 SV * args 3717 coroapi.prepare_nop = prepare_nop;
3718 coroapi.prepare_schedule = prepare_schedule;
3719 coroapi.prepare_cede = prepare_cede;
3720 coroapi.prepare_cede_notself = prepare_cede_notself;
3721
3722 time_init (aTHX);
3723
3724 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3725#if CORO_JIT
3726 PUTBACK;
3727 jit_init (aTHX);
3728 SPAGAIN;
3729#endif
3730}
3731
3732SV *
3733new (SV *klass, ...)
3734 ALIAS:
3735 Coro::new = 1
3736 CODE:
3737 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3738 OUTPUT:
3739 RETVAL
3740
3741void
3742transfer (...)
3743 PROTOTYPE: $$
3744 CODE:
3745 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3746
3747SV *
3748clone (Coro::State coro)
3749 CODE:
3750{
3751#if CORO_CLONE
3752 struct coro *ncoro = coro_clone (aTHX_ coro);
3753 MAGIC *mg;
3754 /* TODO: too much duplication */
3755 ncoro->hv = newHV ();
3756 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3757 mg->mg_flags |= MGf_DUP;
3758 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3759#else
3760 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3761#endif
3762}
3763 OUTPUT:
3764 RETVAL
3765
3766int
3767cctx_stacksize (int new_stacksize = 0)
3768 PROTOTYPE: ;$
3769 CODE:
3770 RETVAL = cctx_stacksize;
3771 if (new_stacksize)
3772 {
3773 cctx_stacksize = new_stacksize;
3774 ++cctx_gen;
3775 }
3776 OUTPUT:
3777 RETVAL
3778
3779int
3780cctx_max_idle (int max_idle = 0)
3781 PROTOTYPE: ;$
3782 CODE:
3783 RETVAL = cctx_max_idle;
3784 if (max_idle > 1)
3785 cctx_max_idle = max_idle;
3786 OUTPUT:
3787 RETVAL
3788
3789int
3790cctx_count ()
3791 PROTOTYPE:
3792 CODE:
3793 RETVAL = cctx_count;
3794 OUTPUT:
3795 RETVAL
3796
3797int
3798cctx_idle ()
3799 PROTOTYPE:
3800 CODE:
3801 RETVAL = cctx_idle;
3802 OUTPUT:
3803 RETVAL
3804
3805void
3806list ()
3807 PROTOTYPE:
3808 PPCODE:
3809{
3810 struct coro *coro;
3811 for (coro = coro_first; coro; coro = coro->next)
3812 if (coro->hv)
3813 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3814}
3815
3816void
3817call (Coro::State coro, SV *coderef)
3818 ALIAS:
3819 eval = 1
3820 CODE:
3821{
3822 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3823 {
3824 struct coro *current = SvSTATE_current;
3825 struct CoroSLF slf_save;
3826
3827 if (current != coro)
3828 {
3829 PUTBACK;
3830 save_perl (aTHX_ current);
3831 load_perl (aTHX_ coro);
3832 /* the coro is most likely in an active SLF call.
3833 * while not strictly required (the code we execute is
3834 * not allowed to call any SLF functions), it's cleaner
3835 * to reinitialise the slf_frame and restore it later.
3836 * This might one day allow us to actually do SLF calls
3837 * from code executed here.
3838 */
3839 slf_save = slf_frame;
3840 slf_frame.prepare = 0;
3841 SPAGAIN;
3842 }
3843
3844 PUSHSTACK;
3845
3846 PUSHMARK (SP);
3847 PUTBACK;
3848
3849 if (ix)
3850 eval_sv (coderef, 0);
3851 else
3852 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3853
3854 POPSTACK;
3855 SPAGAIN;
3856
3857 if (current != coro)
3858 {
3859 PUTBACK;
3860 slf_frame = slf_save;
3861 save_perl (aTHX_ coro);
3862 load_perl (aTHX_ current);
3863 SPAGAIN;
3864 }
3865 }
3866}
3867
3868SV *
3869is_ready (Coro::State coro)
990 PROTOTYPE: $ 3870 PROTOTYPE: $
3871 ALIAS:
3872 is_ready = CF_READY
3873 is_running = CF_RUNNING
3874 is_new = CF_NEW
3875 is_destroyed = CF_ZOMBIE
3876 is_zombie = CF_ZOMBIE
3877 is_suspended = CF_SUSPENDED
3878 CODE:
3879 RETVAL = boolSV (coro->flags & ix);
3880 OUTPUT:
3881 RETVAL
3882
3883void
3884throw (SV *self, SV *exception = &PL_sv_undef)
3885 PROTOTYPE: $;$
991 CODE: 3886 CODE:
992 Coro__State coro; 3887{
3888 struct coro *coro = SvSTATE (self);
3889 struct coro *current = SvSTATE_current;
3890 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3891 SvREFCNT_dec (*exceptionp);
3892 SvGETMAGIC (exception);
3893 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
993 3894
994 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3895 api_ready (aTHX_ self);
995 croak ("Coro::State::_newprocess expects an arrayref"); 3896}
3897
3898void
3899api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3900 PROTOTYPE: $;$
3901 C_ARGS: aTHX_ coro, flags
3902
3903SV *
3904has_cctx (Coro::State coro)
3905 PROTOTYPE: $
3906 CODE:
3907 /* maybe manage the running flag differently */
3908 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3909 OUTPUT:
3910 RETVAL
3911
3912int
3913is_traced (Coro::State coro)
3914 PROTOTYPE: $
3915 CODE:
3916 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3917 OUTPUT:
3918 RETVAL
3919
3920UV
3921rss (Coro::State coro)
3922 PROTOTYPE: $
3923 ALIAS:
3924 usecount = 1
3925 CODE:
3926 switch (ix)
3927 {
3928 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3929 case 1: RETVAL = coro->usecount; break;
996 3930 }
997 Newz (0, coro, 1, struct coro); 3931 OUTPUT:
998
999 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
1000 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1001 /*coro->stack = 0;*/
1002
1003 /* same as JMPENV_BOOTSTRAP */
1004 /* we might be able to recycle start_env, but safe is safe */
1005 /*Zero(&coro->start_env, 1, JMPENV);*/
1006 coro->start_env.je_ret = -1;
1007 coro->start_env.je_mustcatch = TRUE;
1008
1009 RETVAL = coro; 3932 RETVAL
3933
3934void
3935force_cctx ()
3936 PROTOTYPE:
3937 CODE:
3938 cctx_current->idle_sp = 0;
3939
3940void
3941swap_defsv (Coro::State self)
3942 PROTOTYPE: $
3943 ALIAS:
3944 swap_defav = 1
3945 CODE:
3946 if (!self->slot)
3947 croak ("cannot swap state with coroutine that has no saved state,");
3948 else
3949 {
3950 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3951 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3952
3953 SV *tmp = *src; *src = *dst; *dst = tmp;
3954 }
3955
3956void
3957cancel (Coro::State self)
3958 CODE:
3959 coro_state_destroy (aTHX_ self);
3960
3961SV *
3962enable_times (int enabled = enable_times)
3963 CODE:
3964{
3965 RETVAL = boolSV (enable_times);
3966
3967 if (enabled != enable_times)
3968 {
3969 enable_times = enabled;
3970
3971 coro_times_update ();
3972 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3973 }
3974}
1010 OUTPUT: 3975 OUTPUT:
1011 RETVAL 3976 RETVAL
1012 3977
1013void 3978void
1014transfer(prev, next, flags) 3979times (Coro::State self)
1015 SV *prev 3980 PPCODE:
1016 SV *next 3981{
1017 int flags 3982 struct coro *current = SvSTATE (coro_current);
1018 PROTOTYPE: @ 3983
3984 if (ecb_expect_false (current == self))
3985 {
3986 coro_times_update ();
3987 coro_times_add (SvSTATE (coro_current));
3988 }
3989
3990 EXTEND (SP, 2);
3991 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3992 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3993
3994 if (ecb_expect_false (current == self))
3995 coro_times_sub (SvSTATE (coro_current));
3996}
3997
3998void
3999swap_sv (Coro::State coro, SV *sva, SV *svb)
4000 CODE:
4001{
4002 struct coro *current = SvSTATE_current;
4003 AV *swap_sv;
4004 int i;
4005
4006 sva = SvRV (sva);
4007 svb = SvRV (svb);
4008
4009 if (current == coro)
4010 SWAP_SVS_LEAVE (current);
4011
4012 if (!coro->swap_sv)
4013 coro->swap_sv = newAV ();
4014
4015 swap_sv = coro->swap_sv;
4016
4017 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
4018 {
4019 SV *a = AvARRAY (swap_sv)[i ];
4020 SV *b = AvARRAY (swap_sv)[i + 1];
4021
4022 if (a == sva && b == svb)
4023 {
4024 SvREFCNT_dec_NN (a);
4025 SvREFCNT_dec_NN (b);
4026
4027 for (; i <= AvFILLp (swap_sv) - 2; i++)
4028 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4029
4030 AvFILLp (swap_sv) -= 2;
4031
4032 goto removed;
4033 }
4034 }
4035
4036 av_push (swap_sv, SvREFCNT_inc_NN (sva));
4037 av_push (swap_sv, SvREFCNT_inc_NN (svb));
4038
4039 removed:
4040
4041 if (current == coro)
4042 SWAP_SVS_ENTER (current);
4043}
4044
4045
4046MODULE = Coro::State PACKAGE = Coro
4047
4048BOOT:
4049{
4050 if (SVt_LAST > 32)
4051 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
4052
4053 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4054 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4055 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4056 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4057 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4058 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4059 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4060 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4061
4062 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4063 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4064 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4065 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4066
4067 coro_stash = gv_stashpv ("Coro", TRUE);
4068
4069 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4070 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4071 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4072 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4073 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4074 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4075
4076 {
4077 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4078
4079 coroapi.schedule = api_schedule;
4080 coroapi.schedule_to = api_schedule_to;
4081 coroapi.cede = api_cede;
4082 coroapi.cede_notself = api_cede_notself;
4083 coroapi.ready = api_ready;
4084 coroapi.is_ready = api_is_ready;
4085 coroapi.nready = coro_nready;
4086 coroapi.current = coro_current;
4087
4088 coroapi.enterleave_hook = api_enterleave_hook;
4089 coroapi.enterleave_unhook = api_enterleave_unhook;
4090 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4091
4092 /*GCoroAPI = &coroapi;*/
4093 sv_setiv (sv, (IV)&coroapi);
4094 SvREADONLY_on (sv);
4095 }
4096}
4097
4098SV *
4099async (...)
4100 PROTOTYPE: &@
1019 CODE: 4101 CODE:
1020 PUTBACK; 4102 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1021 SV_CORO (next, "Coro::transfer"); 4103 api_ready (aTHX_ RETVAL);
1022 SV_CORO (prev, "Coro::transfer"); 4104 OUTPUT:
1023 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 4105 RETVAL
1024 SPAGAIN;
1025 4106
1026void 4107void
1027DESTROY(coro) 4108_destroy (Coro::State coro)
1028 Coro::State coro 4109 CODE:
1029 CODE: 4110 /* used by the manager thread */
1030 4111 coro_state_destroy (aTHX_ coro);
1031 if (coro->mainstack && coro->mainstack != main_mainstack)
1032 {
1033 struct coro temp;
1034
1035 PUTBACK;
1036 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1037 LOAD (aTHX_ coro);
1038 SPAGAIN;
1039
1040 destroy_stacks (aTHX);
1041
1042 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043 SPAGAIN;
1044
1045 coro->mainstack = 0;
1046 }
1047
1048 deallocate_stack (coro);
1049 SvREFCNT_dec (coro->args);
1050 Safefree (coro);
1051 4112
1052void 4113void
1053_exit(code) 4114on_destroy (Coro::State coro, SV *cb)
1054 int code 4115 CODE:
4116 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4117
4118void
4119join (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_join);
4122
4123void
4124terminate (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4127
4128void
4129cancel (...)
4130 CODE:
4131 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4132
4133int
4134safe_cancel (Coro::State self, ...)
4135 C_ARGS: aTHX_ self, &ST (1), items - 1
4136
4137void
4138schedule (...)
4139 CODE:
4140 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4141
4142void
4143schedule_to (...)
4144 CODE:
4145 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4146
4147void
4148cede_to (...)
4149 CODE:
4150 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4151
4152void
4153cede (...)
4154 CODE:
4155 CORO_EXECUTE_SLF_XS (slf_init_cede);
4156
4157void
4158cede_notself (...)
4159 CODE:
4160 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4161
4162void
4163_set_current (SV *current)
1055 PROTOTYPE: $ 4164 PROTOTYPE: $
1056 CODE: 4165 CODE:
1057 _exit (code); 4166 SvREFCNT_dec_NN (SvRV (coro_current));
1058 4167 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1059MODULE = Coro::State PACKAGE = Coro::Cont
1060
1061# this is slightly dirty (should expose a c-level api)
1062 4168
1063void 4169void
1064yield(...) 4170_set_readyhook (SV *hook)
1065 PROTOTYPE: @ 4171 PROTOTYPE: $
1066 CODE: 4172 CODE:
1067 SV *yieldstack;
1068 SV *sv;
1069 AV *defav = GvAV (PL_defgv);
1070 struct coro *prev, *next;
1071
1072 yieldstack = *hv_fetch (
1073 (HV *)SvRV (GvSV (coro_current)),
1074 "yieldstack", sizeof ("yieldstack") - 1,
1075 0
1076 );
1077
1078 /* set up @_ -- ugly */
1079 av_clear (defav);
1080 av_fill (defav, items - 1);
1081 while (items--)
1082 av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084 sv = av_pop ((AV *)SvRV (yieldstack));
1085 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1086 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1087 SvREFCNT_dec (sv); 4173 SvREFCNT_dec (coro_readyhook);
1088 4174 SvGETMAGIC (hook);
1089 transfer (aTHX_ prev, next, 0); 4175 if (SvOK (hook))
1090 4176 {
1091MODULE = Coro::State PACKAGE = Coro
1092
1093# this is slightly dirty (should expose a c-level api)
1094
1095BOOT:
1096{
1097 int i;
1098 HV *stash = gv_stashpv ("Coro", TRUE);
1099
1100 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106
1107 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1108 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1109
1110 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1111 coro_ready[i] = newAV (); 4177 coro_readyhook = newSVsv (hook);
1112 4178 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1113 {
1114 SV *sv = perl_get_sv("Coro::API", 1);
1115
1116 coroapi.schedule = api_schedule;
1117 coroapi.cede = api_cede;
1118 coroapi.ready = api_ready;
1119 coroapi.nready = &coro_nready;
1120 coroapi.current = coro_current;
1121
1122 GCoroAPI = &coroapi;
1123 sv_setiv(sv, (IV)&coroapi);
1124 SvREADONLY_on(sv);
1125 } 4179 }
1126} 4180 else
4181 {
4182 coro_readyhook = 0;
4183 CORO_READYHOOK = 0;
4184 }
1127 4185
1128#if !PERL_MICRO 4186int
4187prio (Coro::State coro, int newprio = 0)
4188 PROTOTYPE: $;$
4189 ALIAS:
4190 nice = 1
4191 CODE:
4192{
4193 RETVAL = coro->prio;
1129 4194
1130void 4195 if (items > 1)
4196 {
4197 if (ix)
4198 newprio = coro->prio - newprio;
4199
4200 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4201 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4202
4203 coro->prio = newprio;
4204 }
4205}
4206 OUTPUT:
4207 RETVAL
4208
4209SV *
1131ready(self) 4210ready (SV *self)
1132 SV * self
1133 PROTOTYPE: $ 4211 PROTOTYPE: $
1134 CODE: 4212 CODE:
1135 api_ready (self); 4213 RETVAL = boolSV (api_ready (aTHX_ self));
1136 4214 OUTPUT:
1137#endif 4215 RETVAL
1138 4216
1139int 4217int
1140nready(...) 4218nready (...)
1141 PROTOTYPE: 4219 PROTOTYPE:
1142 CODE: 4220 CODE:
1143 RETVAL = coro_nready; 4221 RETVAL = coro_nready;
1144 OUTPUT: 4222 OUTPUT:
1145 RETVAL 4223 RETVAL
1146 4224
1147void 4225void
1148schedule(...) 4226suspend (Coro::State self)
1149 PROTOTYPE: 4227 PROTOTYPE: $
1150 CODE: 4228 CODE:
1151 api_schedule (); 4229 self->flags |= CF_SUSPENDED;
1152 4230
1153void 4231void
1154cede(...) 4232resume (Coro::State self)
1155 PROTOTYPE: 4233 PROTOTYPE: $
1156 CODE: 4234 CODE:
1157 api_cede (); 4235 self->flags &= ~CF_SUSPENDED;
1158 4236
1159# and these are hacks 4237void
4238_pool_handler (...)
4239 CODE:
4240 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4241
4242void
4243async_pool (SV *cv, ...)
4244 PROTOTYPE: &@
4245 PPCODE:
4246{
4247 HV *hv = (HV *)av_pop (av_async_pool);
4248 AV *av = newAV ();
4249 SV *cb = ST (0);
4250 int i;
4251
4252 av_extend (av, items - 2);
4253 for (i = 1; i < items; ++i)
4254 av_push (av, SvREFCNT_inc_NN (ST (i)));
4255
4256 if ((SV *)hv == &PL_sv_undef)
4257 {
4258 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4259 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4260 SvREFCNT_dec_NN (sv);
4261 }
4262
4263 {
4264 struct coro *coro = SvSTATE_hv (hv);
4265
4266 assert (!coro->invoke_cb);
4267 assert (!coro->invoke_av);
4268 coro->invoke_cb = SvREFCNT_inc (cb);
4269 coro->invoke_av = av;
4270 }
4271
4272 api_ready (aTHX_ (SV *)hv);
4273
4274 if (GIMME_V != G_VOID)
4275 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4276 else
4277 SvREFCNT_dec_NN (hv);
4278}
4279
1160SV * 4280SV *
1161_aio_get_state () 4281rouse_cb ()
4282 PROTOTYPE:
1162 CODE: 4283 CODE:
1163{ 4284 RETVAL = coro_new_rouse_cb (aTHX);
1164 struct {
1165 int errorno;
1166 int laststype;
1167 int laststatval;
1168 Stat_t statcache;
1169 } data;
1170
1171 data.errorno = errno;
1172 data.laststype = PL_laststype;
1173 data.laststatval = PL_laststatval;
1174 data.statcache = PL_statcache;
1175
1176 RETVAL = newSVpvn ((char *)&data, sizeof data);
1177}
1178 OUTPUT: 4285 OUTPUT:
1179 RETVAL 4286 RETVAL
1180 4287
1181void 4288void
1182_aio_set_state (char *data_) 4289rouse_wait (...)
4290 PROTOTYPE: ;$
4291 PPCODE:
4292 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4293
4294void
4295on_enter (SV *block)
4296 ALIAS:
4297 on_leave = 1
1183 PROTOTYPE: $ 4298 PROTOTYPE: &
1184 CODE: 4299 CODE:
1185{ 4300{
1186 struct { 4301 struct coro *coro = SvSTATE_current;
4302 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4303
4304 block = s_get_cv_croak (block);
4305
4306 if (!*avp)
4307 *avp = newAV ();
4308
4309 av_push (*avp, SvREFCNT_inc (block));
4310
4311 if (!ix)
4312 on_enterleave_call (aTHX_ block);
4313
4314 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4315 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4316 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4317}
4318
4319
4320MODULE = Coro::State PACKAGE = PerlIO::cede
4321
4322BOOT:
4323 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4324
4325
4326MODULE = Coro::State PACKAGE = Coro::Semaphore
4327
4328SV *
4329new (SV *klass, SV *count = 0)
4330 CODE:
4331{
4332 int semcnt = 1;
4333
4334 if (count)
4335 {
4336 SvGETMAGIC (count);
4337
4338 if (SvOK (count))
4339 semcnt = SvIV (count);
4340 }
4341
4342 RETVAL = sv_bless (
4343 coro_waitarray_new (aTHX_ semcnt),
4344 GvSTASH (CvGV (cv))
4345 );
4346}
4347 OUTPUT:
4348 RETVAL
4349
4350# helper for Coro::Channel and others
4351SV *
4352_alloc (int count)
4353 CODE:
4354 RETVAL = coro_waitarray_new (aTHX_ count);
4355 OUTPUT:
4356 RETVAL
4357
4358SV *
4359count (SV *self)
4360 CODE:
4361 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4362 OUTPUT:
4363 RETVAL
4364
4365void
4366up (SV *self)
4367 CODE:
4368 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4369
4370void
4371adjust (SV *self, int adjust)
4372 CODE:
4373 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4374
4375void
4376down (...)
4377 CODE:
4378 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4379
4380void
4381wait (...)
4382 CODE:
4383 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4384
4385void
4386try (SV *self)
4387 PPCODE:
4388{
4389 AV *av = (AV *)SvRV (self);
4390 SV *count_sv = AvARRAY (av)[0];
4391 IV count = SvIVX (count_sv);
4392
4393 if (count > 0)
4394 {
4395 --count;
4396 SvIVX (count_sv) = count;
4397 XSRETURN_YES;
4398 }
4399 else
4400 XSRETURN_NO;
4401}
4402
4403void
4404waiters (SV *self)
4405 PPCODE:
4406{
4407 AV *av = (AV *)SvRV (self);
4408 int wcount = AvFILLp (av) + 1 - 1;
4409
4410 if (GIMME_V == G_SCALAR)
4411 XPUSHs (sv_2mortal (newSViv (wcount)));
4412 else
4413 {
1187 int errorno; 4414 int i;
1188 int laststype; 4415 EXTEND (SP, wcount);
1189 int laststatval; 4416 for (i = 1; i <= wcount; ++i)
1190 Stat_t statcache; 4417 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1191 } *data = (void *)data_; 4418 }
1192
1193 errno = data->errorno;
1194 PL_laststype = data->laststype;
1195 PL_laststatval = data->laststatval;
1196 PL_statcache = data->statcache;
1197} 4419}
4420
4421MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4422
4423void
4424_may_delete (SV *sem, int count, unsigned int extra_refs)
4425 PPCODE:
4426{
4427 AV *av = (AV *)SvRV (sem);
4428
4429 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4430 && AvFILLp (av) == 0 /* no waiters, just count */
4431 && SvIV (AvARRAY (av)[0]) == count)
4432 XSRETURN_YES;
4433
4434 XSRETURN_NO;
4435}
4436
4437MODULE = Coro::State PACKAGE = Coro::Signal
4438
4439SV *
4440new (SV *klass)
4441 CODE:
4442 RETVAL = sv_bless (
4443 coro_waitarray_new (aTHX_ 0),
4444 GvSTASH (CvGV (cv))
4445 );
4446 OUTPUT:
4447 RETVAL
4448
4449void
4450wait (...)
4451 CODE:
4452 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4453
4454void
4455broadcast (SV *self)
4456 CODE:
4457{
4458 AV *av = (AV *)SvRV (self);
4459 coro_signal_wake (aTHX_ av, AvFILLp (av));
4460}
4461
4462void
4463send (SV *self)
4464 CODE:
4465{
4466 AV *av = (AV *)SvRV (self);
4467
4468 if (AvFILLp (av))
4469 coro_signal_wake (aTHX_ av, 1);
4470 else
4471 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4472}
4473
4474IV
4475awaited (SV *self)
4476 CODE:
4477 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4478 OUTPUT:
4479 RETVAL
4480
4481
4482MODULE = Coro::State PACKAGE = Coro::AnyEvent
4483
4484BOOT:
4485 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4486
4487void
4488_schedule (...)
4489 CODE:
4490{
4491 static int incede;
4492
4493 api_cede_notself (aTHX);
4494
4495 ++incede;
4496 while (coro_nready >= incede && api_cede (aTHX))
4497 ;
4498
4499 sv_setsv (sv_activity, &PL_sv_undef);
4500 if (coro_nready >= incede)
4501 {
4502 PUSHMARK (SP);
4503 PUTBACK;
4504 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4505 }
4506
4507 --incede;
4508}
4509
4510
4511MODULE = Coro::State PACKAGE = Coro::AIO
4512
4513void
4514_register (char *target, char *proto, SV *req)
4515 CODE:
4516{
4517 SV *req_cv = s_get_cv_croak (req);
4518 /* newXSproto doesn't return the CV on 5.8 */
4519 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4520 sv_setpv ((SV *)slf_cv, proto);
4521 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4522}
4523
4524MODULE = Coro::State PACKAGE = Coro::Select
4525
4526void
4527patch_pp_sselect ()
4528 CODE:
4529 if (!coro_old_pp_sselect)
4530 {
4531 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4532 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4533 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4534 }
4535
4536void
4537unpatch_pp_sselect ()
4538 CODE:
4539 if (coro_old_pp_sselect)
4540 {
4541 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4542 coro_old_pp_sselect = 0;
4543 }
4544
4545MODULE = Coro::State PACKAGE = Coro::Util
4546
4547void
4548_exit (int code)
4549 CODE:
4550 _exit (code);
4551
4552NV
4553time ()
4554 CODE:
4555 RETVAL = nvtime (aTHX);
4556 OUTPUT:
4557 RETVAL
4558
4559NV
4560gettimeofday ()
4561 PPCODE:
4562{
4563 UV tv [2];
4564 u2time (aTHX_ tv);
4565 EXTEND (SP, 2);
4566 PUSHs (sv_2mortal (newSVuv (tv [0])));
4567 PUSHs (sv_2mortal (newSVuv (tv [1])));
4568}
4569

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