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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.455 by root, Sun Oct 4 13:07:55 2015 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 PATCHLEVEL < 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
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 120
32#include <signal.h> 121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
33 123
34#ifdef HAVE_MMAP 124/* we hijack an hopefully unused CV flag for our purposes */
35# include <unistd.h> 125#define CVf_SLF 0x4000
36# include <sys/mman.h> 126static OP *pp_slf (pTHX);
37# ifndef MAP_ANONYMOUS 127static void slf_destroy (pTHX_ struct coro *coro);
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif
43# endif
44#endif
45 128
46#define SUB_INIT "Coro::State::initialize" 129static U32 cctx_gen;
47#define UCORO_STATE "_coro_state" 130static size_t cctx_stacksize = CORO_STACKSIZE;
48
49/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif
68
69static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
71static HV *coro_state_stash; 134static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 136
76/* this is actually not only the c stack but also c registers etc... */ 137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum
167{
168 CC_MAPPED = 0x01,
169 CC_NOREUSE = 0x02, /* throw this away after tracing */
170 CC_TRACE = 0x04,
171 CC_TRACE_SUB = 0x08, /* trace sub calls */
172 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174};
175
176/* this is a structure representing a c-level coroutine */
77typedef struct { 177typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 178{
79 int usecnt; /* shared by how many coroutines */ 179 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 180
181 /* the stack */
182 struct coro_stack stack;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
189 JMPENV *top_env;
82 coro_context cctx; 190 coro_context cctx;
83 191
84 void *sptr; 192 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 193#if CORO_USE_VALGRIND
86} coro_stack; 194 int valgrind_id;
195#endif
196 unsigned char flags;
197} coro_cctx;
87 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
205enum
206{
207 CF_RUNNING = 0x0001, /* coroutine is running */
208 CF_READY = 0x0002, /* coroutine is ready */
209 CF_NEW = 0x0004, /* has never been switched to */
210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
213};
214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
225/* this is a structure representing a perl-level coroutine */
88struct coro { 226struct coro
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 227{
90 JMPENV start_env; 228 /* the C coroutine allocated to this perl coroutine, if any */
229 coro_cctx *cctx;
91 230
92 /* the optional C context */ 231 /* ready queue */
93 coro_stack *stack; 232 struct coro *next_ready;
94 void *cursp;
95 int gencnt;
96 233
97 /* optionally saved, might be zero */ 234 /* state data */
98 AV *defav; 235 struct CoroSLF slf_frame; /* saved slf frame */
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 236 AV *mainstack;
110 SV **stack_sp; 237 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 COP *curcop;
134 JMPENV *top_env;
135 238
239 CV *startcv; /* the CV to execute */
136 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
137 AV *args; 241 int flags; /* CF_ flags */
242 HV *hv; /* the perl hash associated with this coro, if any */
243
244 /* statistics */
245 int usecount; /* number of transfers to this coro */
246
247 /* coro process data */
248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
253
254 /* async_pool */
255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
268
269 /* linked list */
270 struct coro *next, *prev;
138}; 271};
139 272
140typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
142 275
143/* mostly copied from op.c:cv_clone2 */ 276/* the following variables are effectively part of the perl context */
144STATIC AV * 277/* and get copied between struct coro and these variables */
145clone_padlist (pTHX_ AV *protopadlist) 278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
281/** Coro ********************************************************************/
282
283#define CORO_PRIO_MAX 3
284#define CORO_PRIO_HIGH 1
285#define CORO_PRIO_NORMAL 0
286#define CORO_PRIO_LOW -1
287#define CORO_PRIO_IDLE -3
288#define CORO_PRIO_MIN -4
289
290/* for Coro.pm */
291static SV *coro_current;
292static SV *coro_readyhook;
293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
146{ 329{
147 AV *av; 330 dSP;
148 I32 ix; 331 PUSHMARK (SP - 4); /* fake argument list */
149 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 332 XPUSHs (coro_select_select);
150 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 333 PUTBACK;
151 SV **pname = AvARRAY (protopad_name); 334
152 SV **ppad = AvARRAY (protopad); 335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
153 I32 fname = AvFILLp (protopad_name); 336 PL_op->op_flags |= OPf_STACKED;
154 I32 fpad = AvFILLp (protopad); 337 PL_op->op_private = 0;
155 AV *newpadlist, *newpad_name, *newpad; 338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
156 SV **npad; 376 SV **svp;
157 377
158 newpad_name = newAV (); 378 require_pv ("Time/HiRes.pm");
159 for (ix = fname; ix >= 0; ix--)
160 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161 379
162 newpad = newAV (); 380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
163 av_fill (newpad, AvFILLp (protopad));
164 npad = AvARRAY (newpad);
165 381
166 newpadlist = newAV (); 382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
392
393/** lowlevel stuff **********************************************************/
394
395static SV * ecb_noinline
396coro_get_sv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
531coro_derive_padlist (pTHX_ CV *cv)
532{
533 PADLIST *padlist = CvPADLIST (cv);
534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
538
539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
167 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
168 av_store (newpadlist, 0, (SV *) newpad_name); 568#endif
169 av_store (newpadlist, 1, (SV *) newpad);
170 569
171 av = newAV (); /* will be @_ */ 570 /* Already extended to 2 elements by newPADLIST. */
172 av_extend (av, 0); 571 PadlistMAX (newpadlist) = 1;
173 av_store (newpad, 0, (SV *) av);
174 AvFLAGS (av) = AVf_REIFY;
175 572
176 for (ix = fpad; ix > 0; ix--) 573 padnames = PadlistNAMES (padlist);
177 { 574 ++PadnamelistREFCNT (padnames);
178 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 575 PadlistNAMES (newpadlist) = padnames;
179 576
180 if (namesv && namesv != &PL_sv_undef) 577 PadlistARRAY (newpadlist)[1] = newpad;
578
579 return newpadlist;
580}
581
582ecb_inline void
583free_padlist (pTHX_ PADLIST *padlist)
584{
585 /* may be during global destruction */
586 if (!IN_DESTRUCT)
587 {
588 I32 i = PadlistMAX (padlist);
589
590 while (i > 0) /* special-case index 0 */
181 { 591 {
182 char *name = SvPVX (namesv); /* XXX */ 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
183 594
184 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 595 if (pad)
185 { /* lexical from outside? */
186 npad[ix] = SvREFCNT_inc (ppad[ix]);
187 } 596 {
188 else 597 I32 j = PadMAX (pad);
189 { /* our own lexical */ 598
190 SV *sv; 599 while (j >= 0)
191 if (*name == '&') 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
601
602 PadMAX (pad) = -1;
192 sv = SvREFCNT_inc (ppad[ix]); 603 SvREFCNT_dec (pad);
193 else if (*name == '@')
194 sv = (SV *) newAV ();
195 else if (*name == '%')
196 sv = (SV *) newHV ();
197 else
198 sv = NEWSV (0, 0);
199
200#ifdef SvPADBUSY
201 if (!SvPADBUSY (sv))
202#endif
203 SvPADMY_on (sv);
204
205 npad[ix] = sv;
206 } 604 }
207 } 605 }
208 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209 {
210 npad[ix] = SvREFCNT_inc (ppad[ix]);
211 }
212 else
213 {
214 SV *sv = NEWSV (0, 0);
215 SvPADTMP_on (sv);
216 npad[ix] = sv;
217 }
218 }
219 606
220#if 0 /* return -ENOTUNDERSTOOD */ 607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
221 /* Now that vars are all in place, clone nested closures. */
222 608
223 for (ix = fpad; ix > 0; ix--) { 609#if NEWPADAPI
224 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 610 Safefree (PadlistARRAY (padlist));
225 if (namesv 611 Safefree (padlist);
226 && namesv != &PL_sv_undef 612#else
227 && !(SvFLAGS(namesv) & SVf_FAKE)
228 && *SvPVX(namesv) == '&'
229 && CvCLONE(ppad[ix]))
230 {
231 CV *kid = cv_clone((CV*)ppad[ix]);
232 SvREFCNT_dec(ppad[ix]);
233 CvCLONE_on(kid);
234 SvPADMY_on(kid);
235 npad[ix] = (SV*)kid;
236 }
237 }
238#endif
239
240 return newpadlist;
241}
242
243STATIC void
244free_padlist (pTHX_ AV *padlist)
245{
246 /* may be during global destruction */
247 if (SvREFCNT (padlist))
248 {
249 I32 i = AvFILLp (padlist); 613 AvFILLp (padlist) = -1;
250 while (i >= 0) 614 AvREAL_off (padlist);
251 {
252 SV **svp = av_fetch (padlist, i--, FALSE);
253 if (svp)
254 {
255 SV *sv;
256 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
257 SvREFCNT_dec (sv);
258
259 SvREFCNT_dec (*svp);
260 }
261 }
262
263 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
264 } 617 }
265} 618}
266 619
267STATIC int 620static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 622{
270 AV *padlist; 623 PADLIST *padlist;
271 AV *av = (AV *)mg->mg_obj; 624 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
625 size_t len = *(size_t *)mg->mg_ptr;
272 626
273 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
275 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
276 633
277 SvREFCNT_dec (av); 634 return 0;
278} 635}
279 636
280#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
281 638 0, 0, 0, 0,
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
640};
283 641
284/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
285STATIC void 643ecb_inline void
286get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
287{ 645{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
647 size_t *lenp;
289 648
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
292 else 651 else
652 {
653#if CORO_PREFER_PERL_FUNCTIONS
654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
656 CV *cp = Perl_cv_clone (aTHX_ cv);
657 CvPADLIST (cv) = CvPADLIST (cp);
658 CvPADLIST (cp) = 0;
659 SvREFCNT_dec (cp);
660#else
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
662#endif
663 }
294} 664}
295 665
296STATIC void 666ecb_inline void
297put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
298{ 668{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
300 670
301 if (!mg) 671 if (ecb_expect_false (!mg))
302 {
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305 mg->mg_virtual = &vtbl_coro;
306 mg->mg_obj = (SV *)newAV ();
307 } 672 {
673 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
674 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
675 mg->mg_len = 1; /* so mg_free frees mg_ptr */
676 }
677 else
678 Renew (mg->mg_ptr,
679 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
680 char);
308 681
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
310} 683}
311 684
312#define SB do { 685/** load & save, init *******************************************************/
313#define SE } while (0)
314 686
315#define LOAD(state) load_state(aTHX_ (state)); 687ecb_inline void
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
317 692
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 693 /* swap sv_any */
694 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
319 695
696 /* swap sv_flags */
697 SvFLAGS (&tmp) = SvFLAGS (a);
698 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
699 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
700
701#if PERL_VERSION_ATLEAST (5,10,0)
702 /* perl 5.10 and later complicates this _quite_ a bit, but it also
703 * is much faster, so no quarrels here. alternatively, we could
704 * sv_upgrade to avoid this.
705 */
706 {
707 /* swap sv_u */
708 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
709
710 /* if SvANY points to the head, we need to adjust the pointers,
711 * as the pointer for a still points to b, and maybe vice versa.
712 */
713 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
714 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
715 svany_in_head_set |= 1 << SVt_NV;
716 #endif
717
718 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
719
720 if (svany_in_head (SvTYPE (a)))
721 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
722
723 if (svany_in_head (SvTYPE (b)))
724 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
725 }
726#endif
727}
728
729/* swap sv heads, at least logically */
320static void 730static void
731swap_svs (pTHX_ Coro__State c)
732{
733 int i;
734
735 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
736 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
737}
738
739#define SWAP_SVS(coro) \
740 if (ecb_expect_false ((coro)->swap_sv)) \
741 swap_svs (aTHX_ (coro))
742
743static void
744on_enterleave_call (pTHX_ SV *cb);
745
746static void
321load_state(pTHX_ Coro__State c) 747load_perl (pTHX_ Coro__State c)
322{ 748{
323 PL_dowarn = c->dowarn; 749 perl_slots *slot = c->slot;
324 PL_in_eval = c->in_eval; 750 c->slot = 0;
325 751
326 PL_curstackinfo = c->curstackinfo;
327 PL_curstack = c->curstack;
328 PL_mainstack = c->mainstack; 752 PL_mainstack = c->mainstack;
329 PL_stack_sp = c->stack_sp;
330 PL_op = c->op;
331 PL_curpad = c->curpad;
332 PL_comppad = c->comppad;
333 PL_compcv = c->compcv;
334 PL_stack_base = c->stack_base;
335 PL_stack_max = c->stack_max;
336 PL_tmps_stack = c->tmps_stack;
337 PL_tmps_floor = c->tmps_floor;
338 PL_tmps_ix = c->tmps_ix;
339 PL_tmps_max = c->tmps_max;
340 PL_markstack = c->markstack;
341 PL_markstack_ptr = c->markstack_ptr;
342 PL_markstack_max = c->markstack_max;
343 PL_scopestack = c->scopestack;
344 PL_scopestack_ix = c->scopestack_ix;
345 PL_scopestack_max = c->scopestack_max;
346 PL_savestack = c->savestack;
347 PL_savestack_ix = c->savestack_ix;
348 PL_savestack_max = c->savestack_max;
349 PL_retstack = c->retstack;
350 PL_retstack_ix = c->retstack_ix;
351 PL_retstack_max = c->retstack_max;
352 PL_curcop = c->curcop;
353 PL_top_env = c->top_env;
354 753
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 754#if CORO_JIT
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 755 load_perl_slots (slot);
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 756#else
757 #define VARx(name,expr,type) expr = slot->name;
758 #include "state.h"
759#endif
358 760
359 { 761 {
360 dSP; 762 dSP;
763
361 CV *cv; 764 CV *cv;
362 765
363 /* now do the ugly restore mess */ 766 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 767 while (ecb_expect_true (cv = (CV *)POPs))
365 { 768 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 769 put_padlist (aTHX_ cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 770 CvDEPTH (cv) = PTR2IV (POPs);
372 } 771 CvPADLIST (cv) = (PADLIST *)POPs;
373
374 ++CvDEPTH(cv);
375 } 772 }
376 773
377 PUTBACK; 774 PUTBACK;
378 } 775 }
379}
380 776
777 slf_frame = c->slf_frame;
778 CORO_THROW = c->except;
779
780 if (ecb_expect_false (enable_times))
781 {
782 if (ecb_expect_false (!times_valid))
783 coro_times_update ();
784
785 coro_times_sub (c);
786 }
787
788 if (ecb_expect_false (c->on_enter))
789 {
790 int i;
791
792 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
793 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
794 }
795
796 if (ecb_expect_false (c->on_enter_xs))
797 {
798 int i;
799
800 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
801 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
802 }
803
804 SWAP_SVS (c);
805}
806
381static void 807static void
382save_state(pTHX_ Coro__State c, int flags) 808save_perl (pTHX_ Coro__State c)
383{ 809{
810 SWAP_SVS (c);
811
812 if (ecb_expect_false (c->on_leave_xs))
813 {
814 int i;
815
816 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
817 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
818 }
819
820 if (ecb_expect_false (c->on_leave))
821 {
822 int i;
823
824 for (i = AvFILLp (c->on_leave); i >= 0; --i)
825 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
826 }
827
828 times_valid = 0;
829
830 if (ecb_expect_false (enable_times))
831 {
832 coro_times_update (); times_valid = 1;
833 coro_times_add (c);
834 }
835
836 c->except = CORO_THROW;
837 c->slf_frame = slf_frame;
838
384 { 839 {
385 dSP; 840 dSP;
386 I32 cxix = cxstack_ix; 841 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 842 PERL_CONTEXT *ccstk = cxstack;
388 PERL_SI *top_si = PL_curstackinfo; 843 PERL_SI *top_si = PL_curstackinfo;
… …
390 /* 845 /*
391 * the worst thing you can imagine happens first - we have to save 846 * the worst thing you can imagine happens first - we have to save
392 * (and reinitialize) all cv's in the whole callchain :( 847 * (and reinitialize) all cv's in the whole callchain :(
393 */ 848 */
394 849
395 PUSHs (Nullsv); 850 XPUSHs (Nullsv);
396 /* this loop was inspired by pp_caller */ 851 /* this loop was inspired by pp_caller */
397 for (;;) 852 for (;;)
398 { 853 {
399 while (cxix >= 0) 854 while (ecb_expect_true (cxix >= 0))
400 { 855 {
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 856 PERL_CONTEXT *cx = &ccstk[cxix--];
402 857
403 if (CxTYPE(cx) == CXt_SUB) 858 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
404 { 859 {
405 CV *cv = cx->blk_sub.cv; 860 CV *cv = cx->blk_sub.cv;
861
406 if (CvDEPTH(cv)) 862 if (ecb_expect_true (CvDEPTH (cv)))
407 { 863 {
408 EXTEND (SP, CvDEPTH(cv)*2); 864 EXTEND (SP, 3);
409
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416
417 PUSHs ((SV *)CvPADLIST(cv)); 865 PUSHs ((SV *)CvPADLIST (cv));
866 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 867 PUSHs ((SV *)cv);
419 868
869 CvDEPTH (cv) = 0;
420 get_padlist (aTHX_ cv); /* this is a monster */ 870 get_padlist (aTHX_ cv);
421 } 871 }
422 } 872 }
423#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT)
425 {
426 /* I never used formats, so how should I know how these are implemented? */
427 /* my bold guess is as a simple, plain sub... */
428 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429 }
430#endif
431 } 873 }
432 874
433 if (top_si->si_type == PERLSI_MAIN) 875 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
434 break; 876 break;
435 877
436 top_si = top_si->si_prev; 878 top_si = top_si->si_prev;
437 ccstk = top_si->si_cxstack; 879 ccstk = top_si->si_cxstack;
438 cxix = top_si->si_cxix; 880 cxix = top_si->si_cxix;
439 } 881 }
440 882
441 PUTBACK; 883 PUTBACK;
442 } 884 }
443 885
444 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 886 /* allocate some space on the context stack for our purposes */
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 887 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 888 {
889 unsigned int i;
447 890
448 c->dowarn = PL_dowarn; 891 for (i = 0; i < SLOT_COUNT; ++i)
449 c->in_eval = PL_in_eval; 892 CXINC;
450 893
451 c->curstackinfo = PL_curstackinfo; 894 cxstack_ix -= SLOT_COUNT; /* undo allocation */
452 c->curstack = PL_curstack; 895 }
896
453 c->mainstack = PL_mainstack; 897 c->mainstack = PL_mainstack;
454 c->stack_sp = PL_stack_sp; 898
455 c->op = PL_op; 899 {
456 c->curpad = PL_curpad; 900 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
457 c->comppad = PL_comppad; 901
458 c->compcv = PL_compcv; 902#if CORO_JIT
459 c->stack_base = PL_stack_base; 903 save_perl_slots (slot);
460 c->stack_max = PL_stack_max; 904#else
461 c->tmps_stack = PL_tmps_stack; 905 #define VARx(name,expr,type) slot->name = expr;
462 c->tmps_floor = PL_tmps_floor; 906 #include "state.h"
463 c->tmps_ix = PL_tmps_ix; 907#endif
464 c->tmps_max = PL_tmps_max; 908 }
465 c->markstack = PL_markstack;
466 c->markstack_ptr = PL_markstack_ptr;
467 c->markstack_max = PL_markstack_max;
468 c->scopestack = PL_scopestack;
469 c->scopestack_ix = PL_scopestack_ix;
470 c->scopestack_max = PL_scopestack_max;
471 c->savestack = PL_savestack;
472 c->savestack_ix = PL_savestack_ix;
473 c->savestack_max = PL_savestack_max;
474 c->retstack = PL_retstack;
475 c->retstack_ix = PL_retstack_ix;
476 c->retstack_max = PL_retstack_max;
477 c->curcop = PL_curcop;
478 c->top_env = PL_top_env;
479} 909}
480 910
481/* 911/*
482 * allocate various perl stacks. This is an exact copy 912 * allocate various perl stacks. This is almost an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 913 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 914 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 915 * not usually need a lot of stackspace.
486 */ 916 */
487STATIC void 917#if CORO_PREFER_PERL_FUNCTIONS
918# define coro_init_stacks(thx) init_stacks ()
919#else
920static void
488coro_init_stacks (pTHX) 921coro_init_stacks (pTHX)
489{ 922{
490 LOCK; 923 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493 PL_curstackinfo->si_type = PERLSI_MAIN; 924 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 925 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 926 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 927
497 PL_stack_base = AvARRAY(PL_curstack); 928 PL_stack_base = AvARRAY(PL_curstack);
498 PL_stack_sp = PL_stack_base; 929 PL_stack_sp = PL_stack_base;
499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 930 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500 931
501 New(50,PL_tmps_stack,96,SV*); 932 New(50,PL_tmps_stack,32,SV*);
502 PL_tmps_floor = -1; 933 PL_tmps_floor = -1;
503 PL_tmps_ix = -1; 934 PL_tmps_ix = -1;
504 PL_tmps_max = 96; 935 PL_tmps_max = 32;
505 936
506 New(54,PL_markstack,16,I32); 937 New(54,PL_markstack,16,I32);
507 PL_markstack_ptr = PL_markstack; 938 PL_markstack_ptr = PL_markstack;
508 PL_markstack_max = PL_markstack + 16; 939 PL_markstack_max = PL_markstack + 16;
509 940
510#ifdef SET_MARK_OFFSET 941#ifdef SET_MARK_OFFSET
511 SET_MARK_OFFSET; 942 SET_MARK_OFFSET;
512#endif 943#endif
513 944
514 New(54,PL_scopestack,16,I32); 945 New(54,PL_scopestack,8,I32);
515 PL_scopestack_ix = 0; 946 PL_scopestack_ix = 0;
516 PL_scopestack_max = 16; 947 PL_scopestack_max = 8;
948#if HAS_SCOPESTACK_NAME
949 New(54,PL_scopestack_name,8,const char*);
950#endif
517 951
518 New(54,PL_savestack,96,ANY); 952 New(54,PL_savestack,24,ANY);
519 PL_savestack_ix = 0; 953 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 954 PL_savestack_max = 24;
521 955
956#if !PERL_VERSION_ATLEAST (5,10,0)
522 New(54,PL_retstack,8,OP*); 957 New(54,PL_retstack,4,OP*);
523 PL_retstack_ix = 0; 958 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 959 PL_retstack_max = 4;
525 960#endif
526 UNLOCK;
527} 961}
962#endif
528 963
529/* 964/*
530 * destroy the stacks, the callchain etc... 965 * destroy the stacks, the callchain etc...
531 */ 966 */
532STATIC void 967static void
533destroy_stacks(pTHX) 968coro_destruct_stacks (pTHX)
534{ 969{
535 if (!IN_DESTRUCT)
536 {
537 /* is this ugly, I ask? */
538 LEAVE_SCOPE (0);
539
540 /* sure it is, but more important: is it correct?? :/ */
541 FREETMPS;
542
543 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544 }
545
546 while (PL_curstackinfo->si_next) 970 while (PL_curstackinfo->si_next)
547 PL_curstackinfo = PL_curstackinfo->si_next; 971 PL_curstackinfo = PL_curstackinfo->si_next;
548 972
549 while (PL_curstackinfo) 973 while (PL_curstackinfo)
550 { 974 {
551 PERL_SI *p = PL_curstackinfo->si_prev; 975 PERL_SI *p = PL_curstackinfo->si_prev;
552 976
553 { /*D*//*remove*/
554 dSP;
555 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556 PUTBACK; /* possibly superfluous */
557 }
558
559 if (!IN_DESTRUCT) 977 if (!IN_DESTRUCT)
560 {
561 dounwind (-1);/*D*//*remove*/
562 SvREFCNT_dec (PL_curstackinfo->si_stack); 978 SvREFCNT_dec (PL_curstackinfo->si_stack);
563 }
564 979
565 Safefree (PL_curstackinfo->si_cxstack); 980 Safefree (PL_curstackinfo->si_cxstack);
566 Safefree (PL_curstackinfo); 981 Safefree (PL_curstackinfo);
567 PL_curstackinfo = p; 982 PL_curstackinfo = p;
568 } 983 }
569 984
570 Safefree (PL_tmps_stack); 985 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 986 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 987 Safefree (PL_scopestack);
988#if HAS_SCOPESTACK_NAME
989 Safefree (PL_scopestack_name);
990#endif
573 Safefree (PL_savestack); 991 Safefree (PL_savestack);
992#if !PERL_VERSION_ATLEAST (5,10,0)
574 Safefree (PL_retstack); 993 Safefree (PL_retstack);
575}
576
577static void
578allocate_stack (Coro__State ctx, int alloc)
579{
580 coro_stack *stack;
581
582 New (0, stack, 1, coro_stack);
583
584 stack->refcnt = 1;
585 stack->usecnt = 1;
586 stack->gencnt = ctx->gencnt = 0;
587
588 if (alloc)
589 {
590#if HAVE_MMAP
591 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593 if (stack->sptr == (void *)-1)
594#endif 994#endif
995}
996
997#define CORO_RSS \
998 rss += sizeof (SYM (curstackinfo)); \
999 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1000 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1001 rss += SYM (tmps_max) * sizeof (SV *); \
1002 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1003 rss += SYM (scopestack_max) * sizeof (I32); \
1004 rss += SYM (savestack_max) * sizeof (ANY);
1005
1006static size_t
1007coro_rss (pTHX_ struct coro *coro)
1008{
1009 size_t rss = sizeof (*coro);
1010
1011 if (coro->mainstack)
1012 {
1013 if (coro->flags & CF_RUNNING)
595 { 1014 {
596 /*FIXME*//*D*//* reasonable stack size! */ 1015 #define SYM(sym) PL_ ## sym
597 stack->ssize = - (8192 * sizeof (long)); 1016 CORO_RSS;
598 New (0, stack->sptr, 8192, long); 1017 #undef SYM
599 } 1018 }
600 }
601 else 1019 else
602 stack->sptr = 0;
603
604 ctx->stack = stack;
605}
606
607static void
608deallocate_stack (Coro__State ctx)
609{
610 coro_stack *stack = ctx->stack;
611
612 ctx->stack = 0;
613
614 if (stack)
615 {
616 if (!--stack->refcnt)
617 { 1020 {
618#ifdef HAVE_MMAP 1021 #define SYM(sym) coro->slot->sym
619 if (stack->ssize > 0 && stack->sptr) 1022 CORO_RSS;
620 munmap (stack->sptr, stack->ssize); 1023 #undef SYM
1024 }
1025 }
1026
1027 return rss;
1028}
1029
1030/** coroutine stack handling ************************************************/
1031
1032static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1033static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1034static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1035
1036/* apparently < 5.8.8 */
1037#ifndef MgPV_nolen_const
1038#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1039 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1040 (const char*)(mg)->mg_ptr)
1041#endif
1042
1043/*
1044 * This overrides the default magic get method of %SIG elements.
1045 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1046 * and instead of trying to save and restore the hash elements (extremely slow),
1047 * we just provide our own readback here.
1048 */
1049static int ecb_cold
1050coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1051{
1052 const char *s = MgPV_nolen_const (mg);
1053
1054 if (*s == '_')
1055 {
1056 SV **svp = 0;
1057
1058 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1059 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1060
1061 if (svp)
1062 {
1063 SV *ssv;
1064
1065 if (!*svp)
1066 ssv = &PL_sv_undef;
1067 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1068 ssv = sv_2mortal (newRV_inc (*svp));
621 else 1069 else
622#endif 1070 ssv = *svp;
623 Safefree (stack->sptr);
624 1071
625 Safefree (stack); 1072 sv_setsv (sv, ssv);
1073 return 0;
626 } 1074 }
627 else if (ctx->gencnt == stack->gencnt) 1075 }
628 --stack->usecnt; 1076
1077 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1078}
1079
1080static int ecb_cold
1081coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1082{
1083 const char *s = MgPV_nolen_const (mg);
1084
1085 if (*s == '_')
629 } 1086 {
630} 1087 SV **svp = 0;
631 1088
1089 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1090 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1091
1092 if (svp)
1093 {
1094 SV *old = *svp;
1095 *svp = 0;
1096 SvREFCNT_dec (old);
1097 return 0;
1098 }
1099 }
1100
1101 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1102}
1103
1104static int ecb_cold
1105coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1106{
1107 const char *s = MgPV_nolen_const (mg);
1108
1109 if (*s == '_')
1110 {
1111 SV **svp = 0;
1112
1113 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1114 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1115
1116 if (svp)
1117 {
1118 SV *old = *svp;
1119 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1120 SvREFCNT_dec (old);
1121 return 0;
1122 }
1123 }
1124
1125 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1126}
1127
1128static void
1129prepare_nop (pTHX_ struct coro_transfer_args *ta)
1130{
1131 /* kind of mega-hacky, but works */
1132 ta->next = ta->prev = (struct coro *)ta;
1133}
1134
632static void 1135static int
633setup_coro (void *arg) 1136slf_check_nop (pTHX_ struct CoroSLF *frame)
1137{
1138 return 0;
1139}
1140
1141static int
1142slf_check_repeat (pTHX_ struct CoroSLF *frame)
1143{
1144 return 1;
1145}
1146
1147static UNOP init_perl_op;
1148
1149ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1150init_perl (pTHX_ struct coro *coro)
634{ 1151{
635 /* 1152 /*
636 * emulate part of the perl startup here. 1153 * emulate part of the perl startup here.
637 */ 1154 */
1155 coro_init_stacks (aTHX);
1156
1157 PL_runops = RUNOPS_DEFAULT;
1158 PL_curcop = &PL_compiling;
1159 PL_in_eval = EVAL_NULL;
1160 PL_comppad = 0;
1161 PL_comppad_name = 0;
1162 PL_comppad_name_fill = 0;
1163 PL_comppad_name_floor = 0;
1164 PL_curpm = 0;
1165 PL_curpad = 0;
1166 PL_localizing = 0;
1167 PL_restartop = 0;
1168#if PERL_VERSION_ATLEAST (5,10,0)
1169 PL_parser = 0;
1170#endif
1171 PL_hints = 0;
1172
1173 /* recreate the die/warn hooks */
1174 PL_diehook = SvREFCNT_inc (rv_diehook);
1175 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1176
1177 GvSV (PL_defgv) = newSV (0);
1178 GvAV (PL_defgv) = coro->args; coro->args = 0;
1179 GvSV (PL_errgv) = newSV (0);
1180 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1181 GvHV (PL_hintgv) = newHV ();
1182#if PERL_VERSION_ATLEAST (5,10,0)
1183 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1184#endif
1185 PL_rs = newSVsv (GvSV (irsgv));
1186 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1187
1188 {
1189 dSP;
1190 UNOP myop;
1191
1192 Zero (&myop, 1, UNOP);
1193 myop.op_next = Nullop;
1194 myop.op_type = OP_ENTERSUB;
1195 myop.op_flags = OPf_WANT_VOID;
1196
1197 PUSHMARK (SP);
1198 PUSHs ((SV *)coro->startcv);
1199 PUTBACK;
1200 PL_op = (OP *)&myop;
1201 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1202 }
1203
1204 /* this newly created coroutine might be run on an existing cctx which most
1205 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1206 */
1207 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1208 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1209 slf_frame.destroy = 0;
1210
1211 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1212 init_perl_op.op_next = PL_op;
1213 init_perl_op.op_type = OP_ENTERSUB;
1214 init_perl_op.op_ppaddr = pp_slf;
1215 /* no flags etc. required, as an init function won't be called */
1216
1217 PL_op = (OP *)&init_perl_op;
1218
1219 /* copy throw, in case it was set before init_perl */
1220 CORO_THROW = coro->except;
1221
1222 SWAP_SVS (coro);
1223
1224 if (ecb_expect_false (enable_times))
1225 {
1226 coro_times_update ();
1227 coro_times_sub (coro);
1228 }
1229}
1230
1231static void
1232coro_unwind_stacks (pTHX)
1233{
1234 if (!IN_DESTRUCT)
1235 {
1236 /* restore all saved variables and stuff */
1237 LEAVE_SCOPE (0);
1238 assert (PL_tmps_floor == -1);
1239
1240 /* free all temporaries */
1241 FREETMPS;
1242 assert (PL_tmps_ix == -1);
1243
1244 /* unwind all extra stacks */
1245 POPSTACK_TO (PL_mainstack);
1246
1247 /* unwind main stack */
1248 dounwind (-1);
1249 }
1250}
1251
1252static void
1253destroy_perl (pTHX_ struct coro *coro)
1254{
1255 SV *svf [9];
1256
1257 {
1258 SV *old_current = SvRV (coro_current);
1259 struct coro *current = SvSTATE (old_current);
1260
1261 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1262
1263 save_perl (aTHX_ current);
1264
1265 /* this will cause transfer_check to croak on block*/
1266 SvRV_set (coro_current, (SV *)coro->hv);
1267
1268 load_perl (aTHX_ coro);
1269
1270 coro_unwind_stacks (aTHX);
1271
1272 /* restore swapped sv's */
1273 SWAP_SVS (coro);
1274
1275 coro_destruct_stacks (aTHX);
1276
1277 /* now save some sv's to be free'd later */
1278 svf [0] = GvSV (PL_defgv);
1279 svf [1] = (SV *)GvAV (PL_defgv);
1280 svf [2] = GvSV (PL_errgv);
1281 svf [3] = (SV *)PL_defoutgv;
1282 svf [4] = PL_rs;
1283 svf [5] = GvSV (irsgv);
1284 svf [6] = (SV *)GvHV (PL_hintgv);
1285 svf [7] = PL_diehook;
1286 svf [8] = PL_warnhook;
1287 assert (9 == sizeof (svf) / sizeof (*svf));
1288
1289 SvRV_set (coro_current, old_current);
1290
1291 load_perl (aTHX_ current);
1292 }
1293
1294 {
1295 unsigned int i;
1296
1297 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1298 SvREFCNT_dec (svf [i]);
1299
1300 SvREFCNT_dec (coro->saved_deffh);
1301 SvREFCNT_dec (coro->rouse_cb);
1302 SvREFCNT_dec (coro->invoke_cb);
1303 SvREFCNT_dec (coro->invoke_av);
1304 SvREFCNT_dec (coro->on_enter_xs);
1305 SvREFCNT_dec (coro->on_leave_xs);
1306 }
1307}
1308
1309ecb_inline void
1310free_coro_mortal (pTHX)
1311{
1312 if (ecb_expect_true (coro_mortal))
1313 {
1314 SvREFCNT_dec ((SV *)coro_mortal);
1315 coro_mortal = 0;
1316 }
1317}
1318
1319static int
1320runops_trace (pTHX)
1321{
1322 COP *oldcop = 0;
1323 int oldcxix = -2;
1324
1325 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1326 {
1327 PERL_ASYNC_CHECK ();
1328
1329 if (cctx_current->flags & CC_TRACE_ALL)
1330 {
1331 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1332 {
1333 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1334 SV **bot, **top;
1335 AV *av = newAV (); /* return values */
1336 SV **cb;
1337 dSP;
1338
1339 GV *gv = CvGV (cx->blk_sub.cv);
1340 SV *fullname = sv_2mortal (newSV (0));
1341 if (isGV (gv))
1342 gv_efullname3 (fullname, gv, 0);
1343
1344 bot = PL_stack_base + cx->blk_oldsp + 1;
1345 top = cx->blk_gimme == G_ARRAY ? SP + 1
1346 : cx->blk_gimme == G_SCALAR ? bot + 1
1347 : bot;
1348
1349 av_extend (av, top - bot);
1350 while (bot < top)
1351 av_push (av, SvREFCNT_inc_NN (*bot++));
1352
1353 PL_runops = RUNOPS_DEFAULT;
1354 ENTER;
1355 SAVETMPS;
1356 EXTEND (SP, 3);
1357 PUSHMARK (SP);
1358 PUSHs (&PL_sv_no);
1359 PUSHs (fullname);
1360 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1361 PUTBACK;
1362 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1363 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1364 SPAGAIN;
1365 FREETMPS;
1366 LEAVE;
1367 PL_runops = runops_trace;
1368 }
1369
1370 if (oldcop != PL_curcop)
1371 {
1372 oldcop = PL_curcop;
1373
1374 if (PL_curcop != &PL_compiling)
1375 {
1376 SV **cb;
1377
1378 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1379 {
1380 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1381
1382 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1383 {
1384 dSP;
1385 GV *gv = CvGV (cx->blk_sub.cv);
1386 SV *fullname = sv_2mortal (newSV (0));
1387
1388 if (isGV (gv))
1389 gv_efullname3 (fullname, gv, 0);
1390
1391 PL_runops = RUNOPS_DEFAULT;
1392 ENTER;
1393 SAVETMPS;
1394 EXTEND (SP, 3);
1395 PUSHMARK (SP);
1396 PUSHs (&PL_sv_yes);
1397 PUSHs (fullname);
1398 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1399 PUTBACK;
1400 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1401 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1402 SPAGAIN;
1403 FREETMPS;
1404 LEAVE;
1405 PL_runops = runops_trace;
1406 }
1407
1408 oldcxix = cxstack_ix;
1409 }
1410
1411 if (cctx_current->flags & CC_TRACE_LINE)
1412 {
1413 dSP;
1414
1415 PL_runops = RUNOPS_DEFAULT;
1416 ENTER;
1417 SAVETMPS;
1418 EXTEND (SP, 3);
1419 PL_runops = RUNOPS_DEFAULT;
1420 PUSHMARK (SP);
1421 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1422 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1423 PUTBACK;
1424 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1425 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1426 SPAGAIN;
1427 FREETMPS;
1428 LEAVE;
1429 PL_runops = runops_trace;
1430 }
1431 }
1432 }
1433 }
1434 }
1435
1436 TAINT_NOT;
1437 return 0;
1438}
1439
1440static struct CoroSLF cctx_ssl_frame;
1441
1442static void
1443slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1444{
1445 ta->prev = 0;
1446}
1447
1448static int
1449slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1450{
1451 *frame = cctx_ssl_frame;
1452
1453 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1454}
1455
1456/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1457static void ecb_noinline
1458cctx_prepare (pTHX)
1459{
1460 PL_top_env = &PL_start_env;
1461
1462 if (cctx_current->flags & CC_TRACE)
1463 PL_runops = runops_trace;
1464
1465 /* we already must be executing an SLF op, there is no other valid way
1466 * that can lead to creation of a new cctx */
1467 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1468 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1469
1470 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1471 cctx_ssl_frame = slf_frame;
1472
1473 slf_frame.prepare = slf_prepare_set_stacklevel;
1474 slf_frame.check = slf_check_set_stacklevel;
1475}
1476
1477/* the tail of transfer: execute stuff we can only do after a transfer */
1478ecb_inline void
1479transfer_tail (pTHX)
1480{
1481 free_coro_mortal (aTHX);
1482}
1483
1484/* try to exit the same way perl's main function would do */
1485/* we do not bother resetting the environment or other things *7
1486/* that are not, uhm, essential */
1487/* this obviously also doesn't work when perl is embedded */
1488static void ecb_noinline ecb_cold
1489perlish_exit (pTHX)
1490{
1491 int exitstatus = perl_destruct (PL_curinterp);
1492 perl_free (PL_curinterp);
1493 exit (exitstatus);
1494}
1495
1496/*
1497 * this is a _very_ stripped down perl interpreter ;)
1498 */
1499static void
1500cctx_run (void *arg)
1501{
1502#ifdef USE_ITHREADS
1503# if CORO_PTHREAD
1504 PERL_SET_CONTEXT (coro_thx);
1505# endif
1506#endif
1507 {
1508 dTHX;
1509
1510 /* normally we would need to skip the entersub here */
1511 /* not doing so will re-execute it, which is exactly what we want */
1512 /* PL_nop = PL_nop->op_next */
1513
1514 /* inject a fake subroutine call to cctx_init */
1515 cctx_prepare (aTHX);
1516
1517 /* cctx_run is the alternative tail of transfer() */
1518 transfer_tail (aTHX);
1519
1520 /* somebody or something will hit me for both perl_run and PL_restartop */
1521 PL_restartop = PL_op;
1522 perl_run (PL_curinterp);
1523 /*
1524 * Unfortunately, there is no way to get at the return values of the
1525 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1526 * runtime errors here, as this is just a random interpreter, not a thread.
1527 */
1528
1529 /*
1530 * If perl-run returns we assume exit() was being called or the coro
1531 * fell off the end, which seems to be the only valid (non-bug)
1532 * reason for perl_run to return. We try to mimic whatever perl is normally
1533 * doing in that case. YMMV.
1534 */
1535 perlish_exit (aTHX);
1536 }
1537}
1538
1539static coro_cctx *
1540cctx_new (void)
1541{
1542 coro_cctx *cctx;
1543
1544 ++cctx_count;
1545 New (0, cctx, 1, coro_cctx);
1546
1547 cctx->gen = cctx_gen;
1548 cctx->flags = 0;
1549 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1550
1551 return cctx;
1552}
1553
1554/* create a new cctx only suitable as source */
1555static coro_cctx *
1556cctx_new_empty (void)
1557{
1558 coro_cctx *cctx = cctx_new ();
1559
1560 cctx->stack.sptr = 0;
1561 coro_create (&cctx->cctx, 0, 0, 0, 0);
1562
1563 return cctx;
1564}
1565
1566/* create a new cctx suitable as destination/running a perl interpreter */
1567static coro_cctx *
1568cctx_new_run (void)
1569{
1570 coro_cctx *cctx = cctx_new ();
1571
1572 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1573 {
1574 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1575 _exit (EXIT_FAILURE);
1576 }
1577
1578 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1579
1580 return cctx;
1581}
1582
1583static void
1584cctx_destroy (coro_cctx *cctx)
1585{
1586 if (!cctx)
1587 return;
1588
1589 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1590
1591 --cctx_count;
1592 coro_destroy (&cctx->cctx);
1593
1594 coro_stack_free (&cctx->stack);
1595
1596 Safefree (cctx);
1597}
1598
1599/* wether this cctx should be destructed */
1600#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1601
1602static coro_cctx *
1603cctx_get (pTHX)
1604{
1605 while (ecb_expect_true (cctx_first))
1606 {
1607 coro_cctx *cctx = cctx_first;
1608 cctx_first = cctx->next;
1609 --cctx_idle;
1610
1611 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1612 return cctx;
1613
1614 cctx_destroy (cctx);
1615 }
1616
1617 return cctx_new_run ();
1618}
1619
1620static void
1621cctx_put (coro_cctx *cctx)
1622{
1623 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1624
1625 /* free another cctx if overlimit */
1626 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1627 {
1628 coro_cctx *first = cctx_first;
1629 cctx_first = first->next;
1630 --cctx_idle;
1631
1632 cctx_destroy (first);
1633 }
1634
1635 ++cctx_idle;
1636 cctx->next = cctx_first;
1637 cctx_first = cctx;
1638}
1639
1640/** coroutine switching *****************************************************/
1641
1642static void
1643transfer_check (pTHX_ struct coro *prev, struct coro *next)
1644{
1645 /* TODO: throwing up here is considered harmful */
1646
1647 if (ecb_expect_true (prev != next))
1648 {
1649 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1650 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1651
1652 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1653 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1654
1655#if !PERL_VERSION_ATLEAST (5,10,0)
1656 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1657 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1658#endif
1659 }
1660}
1661
1662/* always use the TRANSFER macro */
1663static void ecb_noinline /* noinline so we have a fixed stackframe */
1664transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1665{
1666 dSTACKLEVEL;
1667
1668 /* sometimes transfer is only called to set idle_sp */
1669 if (ecb_expect_false (!prev))
1670 {
1671 cctx_current->idle_sp = STACKLEVEL;
1672 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1673 }
1674 else if (ecb_expect_true (prev != next))
1675 {
1676 coro_cctx *cctx_prev;
1677
1678 if (ecb_expect_false (prev->flags & CF_NEW))
1679 {
1680 /* create a new empty/source context */
1681 prev->flags &= ~CF_NEW;
1682 prev->flags |= CF_RUNNING;
1683 }
1684
1685 prev->flags &= ~CF_RUNNING;
1686 next->flags |= CF_RUNNING;
1687
1688 /* first get rid of the old state */
1689 save_perl (aTHX_ prev);
1690
1691 if (ecb_expect_false (next->flags & CF_NEW))
1692 {
1693 /* need to start coroutine */
1694 next->flags &= ~CF_NEW;
1695 /* setup coroutine call */
1696 init_perl (aTHX_ next);
1697 }
1698 else
1699 load_perl (aTHX_ next);
1700
1701 /* possibly untie and reuse the cctx */
1702 if (ecb_expect_true (
1703 cctx_current->idle_sp == STACKLEVEL
1704 && !(cctx_current->flags & CC_TRACE)
1705 && !force_cctx
1706 ))
1707 {
1708 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1709 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1710
1711 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1712 /* without this the next cctx_get might destroy the running cctx while still in use */
1713 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1714 if (ecb_expect_true (!next->cctx))
1715 next->cctx = cctx_get (aTHX);
1716
1717 cctx_put (cctx_current);
1718 }
1719 else
1720 prev->cctx = cctx_current;
1721
1722 ++next->usecount;
1723
1724 cctx_prev = cctx_current;
1725 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1726
1727 next->cctx = 0;
1728
1729 if (ecb_expect_false (cctx_prev != cctx_current))
1730 {
1731 cctx_prev->top_env = PL_top_env;
1732 PL_top_env = cctx_current->top_env;
1733 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1734 }
1735
1736 transfer_tail (aTHX);
1737 }
1738}
1739
1740#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1741#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1742
1743/** high level stuff ********************************************************/
1744
1745/* this function is actually Coro, not Coro::State, but we call it from here */
1746/* because it is convenient - but it hasn't been declared yet for that reason */
1747static void
1748coro_call_on_destroy (pTHX_ struct coro *coro);
1749
1750static void
1751coro_state_destroy (pTHX_ struct coro *coro)
1752{
1753 if (coro->flags & CF_ZOMBIE)
1754 return;
1755
1756 slf_destroy (aTHX_ coro);
1757
1758 coro->flags |= CF_ZOMBIE;
1759
1760 if (coro->flags & CF_READY)
1761 {
1762 /* reduce nready, as destroying a ready coro effectively unreadies it */
1763 /* alternative: look through all ready queues and remove the coro */
1764 --coro_nready;
1765 }
1766 else
1767 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1768
1769 if (coro->next) coro->next->prev = coro->prev;
1770 if (coro->prev) coro->prev->next = coro->next;
1771 if (coro == coro_first) coro_first = coro->next;
1772
1773 if (coro->mainstack
1774 && coro->mainstack != main_mainstack
1775 && coro->slot
1776 && !PL_dirty)
1777 destroy_perl (aTHX_ coro);
1778
1779 cctx_destroy (coro->cctx);
1780 SvREFCNT_dec (coro->startcv);
1781 SvREFCNT_dec (coro->args);
1782 SvREFCNT_dec (coro->swap_sv);
1783 SvREFCNT_dec (CORO_THROW);
1784
1785 coro_call_on_destroy (aTHX_ coro);
1786
1787 /* more destruction mayhem in coro_state_free */
1788}
1789
1790static int
1791coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1792{
1793 struct coro *coro = (struct coro *)mg->mg_ptr;
1794 mg->mg_ptr = 0;
1795
1796 coro_state_destroy (aTHX_ coro);
1797 SvREFCNT_dec (coro->on_destroy);
1798 SvREFCNT_dec (coro->status);
1799
1800 Safefree (coro);
1801
1802 return 0;
1803}
1804
1805static int ecb_cold
1806coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1807{
1808 /* called when perl clones the current process the slow way (windows process emulation) */
1809 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1810 mg->mg_ptr = 0;
1811 mg->mg_virtual = 0;
1812
1813 return 0;
1814}
1815
1816static MGVTBL coro_state_vtbl = {
1817 0, 0, 0, 0,
1818 coro_state_free,
1819 0,
1820#ifdef MGf_DUP
1821 coro_state_dup,
1822#else
1823# define MGf_DUP 0
1824#endif
1825};
1826
1827static void
1828prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1829{
1830 ta->prev = SvSTATE (prev_sv);
1831 ta->next = SvSTATE (next_sv);
1832 TRANSFER_CHECK (*ta);
1833}
1834
1835static void
1836api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1837{
1838 struct coro_transfer_args ta;
1839
1840 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1841 TRANSFER (ta, 1);
1842}
1843
1844/** Coro ********************************************************************/
1845
1846ecb_inline void
1847coro_enq (pTHX_ struct coro *coro)
1848{
1849 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1850
1851 SvREFCNT_inc_NN (coro->hv);
1852
1853 coro->next_ready = 0;
1854 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1855 ready [1] = coro;
1856}
1857
1858ecb_inline struct coro *
1859coro_deq (pTHX)
1860{
1861 int prio;
1862
1863 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1864 {
1865 struct coro **ready = coro_ready [prio];
1866
1867 if (ready [0])
1868 {
1869 struct coro *coro = ready [0];
1870 ready [0] = coro->next_ready;
1871 return coro;
1872 }
1873 }
1874
1875 return 0;
1876}
1877
1878static void
1879invoke_sv_ready_hook_helper (void)
1880{
638 dTHX; 1881 dTHX;
639 dSP; 1882 dSP;
640 Coro__State ctx = (Coro__State)arg;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642 1883
643 coro_init_stacks (aTHX); 1884 ENTER;
644 /*PL_curcop = 0;*/ 1885 SAVETMPS;
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */
646 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648 1886
649 SPAGAIN;
650
651 if (ctx->stack)
652 {
653 ctx->cursp = 0;
654
655 PUSHMARK(SP); 1887 PUSHMARK (SP);
656 PUTBACK; 1888 PUTBACK;
657 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1889 call_sv (coro_readyhook, G_VOID | G_DISCARD);
658 1890
659 if (SvTRUE (ERRSV)) 1891 FREETMPS;
660 croak (NULL); 1892 LEAVE;
661 else 1893}
662 croak ("FATAL: CCTXT coroutine returned!"); 1894
1895static int
1896api_ready (pTHX_ SV *coro_sv)
1897{
1898 struct coro *coro = SvSTATE (coro_sv);
1899
1900 if (coro->flags & CF_READY)
1901 return 0;
1902
1903 coro->flags |= CF_READY;
1904
1905 coro_enq (aTHX_ coro);
1906
1907 if (!coro_nready++)
1908 if (coroapi.readyhook)
1909 coroapi.readyhook ();
1910
1911 return 1;
1912}
1913
1914static int
1915api_is_ready (pTHX_ SV *coro_sv)
1916{
1917 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1918}
1919
1920/* expects to own a reference to next->hv */
1921ecb_inline void
1922prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1923{
1924 SV *prev_sv = SvRV (coro_current);
1925
1926 ta->prev = SvSTATE_hv (prev_sv);
1927 ta->next = next;
1928
1929 TRANSFER_CHECK (*ta);
1930
1931 SvRV_set (coro_current, (SV *)next->hv);
1932
1933 free_coro_mortal (aTHX);
1934 coro_mortal = prev_sv;
1935}
1936
1937static void
1938prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1939{
1940 for (;;)
663 } 1941 {
664 else 1942 struct coro *next = coro_deq (aTHX);
665 {
666 UNOP myop;
667 1943
668 PL_op = (OP *)&myop; 1944 if (ecb_expect_true (next))
669
670 Zero(&myop, 1, UNOP);
671 myop.op_next = Nullop;
672 myop.op_flags = OPf_WANT_VOID;
673
674 PUSHMARK(SP);
675 XPUSHs (sub_init);
676 /*
677 * the next line is slightly wrong, as PL_op->op_next
678 * is actually being executed so we skip the first op.
679 * that doesn't matter, though, since it is only
680 * pp_nextstate and we never return...
681 * ah yes, and I don't care anyways ;)
682 */
683 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN;
686
687 ENTER; /* necessary e.g. for dounwind */
688 }
689}
690
691static void
692continue_coro (void *arg)
693{
694 /*
695 * this is a _very_ stripped down perl interpreter ;)
696 */
697 dTHX;
698 Coro__State ctx = (Coro__State)arg;
699 JMPENV coro_start_env;
700
701 PL_top_env = &ctx->start_env;
702
703 ctx->cursp = 0;
704 PL_op = PL_op->op_next;
705 CALLRUNOPS(aTHX);
706
707 abort ();
708}
709
710STATIC void
711transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712{
713 dSTACKLEVEL;
714
715 if (prev != next)
716 {
717 if (next->mainstack)
718 { 1945 {
719 LOCK; 1946 /* cannot transfer to destroyed coros, skip and look for next */
720 SAVE (prev, flags); 1947 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
721 LOAD (next); 1948 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
722 UNLOCK; 1949 else
723
724 /* mark this state as in-use */
725 next->mainstack = 0;
726 next->tmps_ix = -2;
727
728 /* stacklevel changed? if yes, grab the stack for us! */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 { 1950 {
731 if (!prev->stack) 1951 next->flags &= ~CF_READY;
732 allocate_stack (prev, 0); 1952 --coro_nready;
733 else if (prev->cursp != stacklevel 1953
734 && prev->stack->usecnt > 1) 1954 prepare_schedule_to (aTHX_ ta, next);
735 { 1955 break;
736 prev->gencnt = ++prev->stack->gencnt;
737 prev->stack->usecnt = 1;
738 }
739
740 /* has our stack been invalidated? */
741 if (next->stack && next->stack->gencnt != next->gencnt)
742 {
743 deallocate_stack (next);
744 allocate_stack (next, 1);
745 coro_create (&(next->stack->cctx),
746 continue_coro, (void *)next,
747 next->stack->sptr, labs (next->stack->ssize));
748 }
749
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 1956 }
754 else
755 next->cursp = stacklevel;
756 } 1957 }
757 else if (next->tmps_ix == -2)
758 croak ("tried to transfer to running coroutine");
759 else 1958 else
760 { 1959 {
761 LOCK; 1960 /* nothing to schedule: call the idle handler */
762 SAVE (prev, -1); /* first get rid of the old state */ 1961 if (SvROK (sv_idle)
763 UNLOCK; 1962 && SvOBJECT (SvRV (sv_idle)))
764
765 if (flags & TRANSFER_SAVE_CCTXT)
766 { 1963 {
767 if (!prev->stack) 1964 if (SvRV (sv_idle) == SvRV (coro_current))
768 allocate_stack (prev, 0);
769
770 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771 { 1965 {
772 PL_top_env = &next->start_env; 1966 require_pv ("Carp");
773 1967
774 setup_coro (next); 1968 {
775 next->cursp = stacklevel; 1969 dSP;
776 1970
777 prev->stack->refcnt++; 1971 ENTER;
778 prev->stack->usecnt++; 1972 SAVETMPS;
779 next->stack = prev->stack; 1973
780 next->gencnt = prev->gencnt; 1974 PUSHMARK (SP);
1975 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1976 PUTBACK;
1977 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1978
1979 FREETMPS;
1980 LEAVE;
1981 }
781 } 1982 }
782 else 1983
783 { 1984 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
784 assert (!next->stack); 1985 api_ready (aTHX_ SvRV (sv_idle));
785 allocate_stack (next, 1); 1986 --coro_nready;
786 coro_create (&(next->stack->cctx),
787 setup_coro, (void *)next,
788 next->stack->sptr, labs (next->stack->ssize));
789 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790 prev->cursp = stacklevel;
791 /* don't add any code here */
792 }
793 } 1987 }
794 else 1988 else
795 { 1989 {
796 setup_coro (next); 1990 /* TODO: deprecated, remove, cannot work reliably *//*D*/
797 next->cursp = stacklevel; 1991 dSP;
1992
1993 ENTER;
1994 SAVETMPS;
1995
1996 PUSHMARK (SP);
1997 PUTBACK;
1998 call_sv (sv_idle, G_VOID | G_DISCARD);
1999
2000 FREETMPS;
2001 LEAVE;
798 } 2002 }
799 } 2003 }
800 } 2004 }
2005}
801 2006
802 LOCK; 2007ecb_inline void
2008prepare_cede (pTHX_ struct coro_transfer_args *ta)
2009{
2010 api_ready (aTHX_ coro_current);
2011 prepare_schedule (aTHX_ ta);
2012}
2013
2014ecb_inline void
2015prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2016{
2017 SV *prev = SvRV (coro_current);
2018
803 if (coro_mortal) 2019 if (coro_nready)
804 {
805 SvREFCNT_dec (coro_mortal);
806 coro_mortal = 0;
807 } 2020 {
808 UNLOCK; 2021 prepare_schedule (aTHX_ ta);
809} 2022 api_ready (aTHX_ prev);
810
811#define SV_CORO(sv,func) \
812 do { \
813 if (SvROK (sv)) \
814 sv = SvRV (sv); \
815 \
816 if (SvTYPE (sv) == SVt_PVHV) \
817 { \
818 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819 \
820 if (!he) \
821 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822 \
823 (sv) = SvRV (HeVAL(he)); \
824 } \
825 \
826 /* must also be changed inside Coro::Cont::yield */ \
827 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829 \
830 } while(0)
831
832#define SvSTATE(sv) (struct coro *)SvIV (sv)
833
834static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags)
836{
837 SV_CORO (prev, "Coro::transfer");
838 SV_CORO (next, "Coro::transfer");
839
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
841}
842
843/** Coro ********************************************************************/
844
845#define PRIO_MAX 3
846#define PRIO_HIGH 1
847#define PRIO_NORMAL 0
848#define PRIO_LOW -1
849#define PRIO_IDLE -3
850#define PRIO_MIN -4
851
852/* for Coro.pm */
853static GV *coro_current, *coro_idle;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855static int coro_nready;
856
857static void
858coro_enq (pTHX_ SV *sv)
859{
860 if (SvTYPE (sv) == SVt_PVHV)
861 { 2023 }
862 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2024 else
863 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2025 prepare_nop (aTHX_ ta);
2026}
864 2027
865 prio = prio > PRIO_MAX ? PRIO_MAX 2028static void
866 : prio < PRIO_MIN ? PRIO_MIN 2029api_schedule (pTHX)
867 : prio; 2030{
2031 struct coro_transfer_args ta;
868 2032
869 av_push (coro_ready [prio - PRIO_MIN], sv); 2033 prepare_schedule (aTHX_ &ta);
870 coro_nready++; 2034 TRANSFER (ta, 1);
2035}
871 2036
2037static void
2038api_schedule_to (pTHX_ SV *coro_sv)
2039{
2040 struct coro_transfer_args ta;
2041 struct coro *next = SvSTATE (coro_sv);
2042
2043 SvREFCNT_inc_NN (coro_sv);
2044 prepare_schedule_to (aTHX_ &ta, next);
2045}
2046
2047static int
2048api_cede (pTHX)
2049{
2050 struct coro_transfer_args ta;
2051
2052 prepare_cede (aTHX_ &ta);
2053
2054 if (ecb_expect_true (ta.prev != ta.next))
2055 {
2056 TRANSFER (ta, 1);
872 return; 2057 return 1;
2058 }
2059 else
2060 return 0;
2061}
2062
2063static int
2064api_cede_notself (pTHX)
2065{
2066 if (coro_nready)
2067 {
2068 struct coro_transfer_args ta;
2069
2070 prepare_cede_notself (aTHX_ &ta);
2071 TRANSFER (ta, 1);
2072 return 1;
2073 }
2074 else
2075 return 0;
2076}
2077
2078static void
2079api_trace (pTHX_ SV *coro_sv, int flags)
2080{
2081 struct coro *coro = SvSTATE (coro_sv);
2082
2083 if (coro->flags & CF_RUNNING)
2084 croak ("cannot enable tracing on a running coroutine, caught");
2085
2086 if (flags & CC_TRACE)
2087 {
2088 if (!coro->cctx)
2089 coro->cctx = cctx_new_run ();
2090 else if (!(coro->cctx->flags & CC_TRACE))
2091 croak ("cannot enable tracing on coroutine with custom stack, caught");
2092
2093 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2094 }
2095 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2096 {
2097 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2098
2099 if (coro->flags & CF_RUNNING)
2100 PL_runops = RUNOPS_DEFAULT;
2101 else
2102 coro->slot->runops = RUNOPS_DEFAULT;
2103 }
2104}
2105
2106static void
2107coro_push_av (pTHX_ AV *av, I32 gimme_v)
2108{
2109 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2110 {
2111 dSP;
2112
2113 if (gimme_v == G_SCALAR)
2114 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2115 else
2116 {
2117 int i;
2118 EXTEND (SP, AvFILLp (av) + 1);
2119
2120 for (i = 0; i <= AvFILLp (av); ++i)
2121 PUSHs (AvARRAY (av)[i]);
2122 }
2123
2124 PUTBACK;
2125 }
2126}
2127
2128static void
2129coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2130{
2131 if (!coro->on_destroy)
2132 coro->on_destroy = newAV ();
2133
2134 av_push (coro->on_destroy, cb);
2135}
2136
2137static void
2138slf_destroy_join (pTHX_ struct CoroSLF *frame)
2139{
2140 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2141}
2142
2143static int
2144slf_check_join (pTHX_ struct CoroSLF *frame)
2145{
2146 struct coro *coro = (struct coro *)frame->data;
2147
2148 if (!coro->status)
2149 return 1;
2150
2151 frame->destroy = 0;
2152
2153 coro_push_av (aTHX_ coro->status, GIMME_V);
2154
2155 SvREFCNT_dec ((SV *)coro->hv);
2156
2157 return 0;
2158}
2159
2160static void
2161slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2162{
2163 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2164
2165 if (items > 1)
2166 croak ("join called with too many arguments");
2167
2168 if (coro->status)
2169 frame->prepare = prepare_nop;
2170 else
2171 {
2172 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2173 frame->prepare = prepare_schedule;
2174 }
2175
2176 frame->check = slf_check_join;
2177 frame->destroy = slf_destroy_join;
2178 frame->data = (void *)coro;
2179 SvREFCNT_inc (coro->hv);
2180}
2181
2182static void
2183coro_call_on_destroy (pTHX_ struct coro *coro)
2184{
2185 AV *od = coro->on_destroy;
2186
2187 if (!od)
2188 return;
2189
2190 coro->on_destroy = 0;
2191 sv_2mortal ((SV *)od);
2192
2193 while (AvFILLp (od) >= 0)
2194 {
2195 SV *cb = sv_2mortal (av_pop (od));
2196
2197 /* coro hv's (and only hv's at the moment) are supported as well */
2198 if (SvSTATEhv_p (aTHX_ cb))
2199 api_ready (aTHX_ cb);
2200 else
2201 {
2202 dSP; /* don't disturb outer sp */
2203 PUSHMARK (SP);
2204
2205 if (coro->status)
2206 {
2207 PUTBACK;
2208 coro_push_av (aTHX_ coro->status, G_ARRAY);
2209 SPAGAIN;
2210 }
2211
2212 PUTBACK;
2213 call_sv (cb, G_VOID | G_DISCARD);
2214 }
2215 }
2216}
2217
2218static void
2219coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2220{
2221 AV *av;
2222
2223 if (coro->status)
2224 {
2225 av = coro->status;
2226 av_clear (av);
2227 }
2228 else
2229 av = coro->status = newAV ();
2230
2231 /* items are actually not so common, so optimise for this case */
2232 if (items)
2233 {
2234 int i;
2235
2236 av_extend (av, items - 1);
2237
2238 for (i = 0; i < items; ++i)
2239 av_push (av, SvREFCNT_inc_NN (arg [i]));
2240 }
2241}
2242
2243static void
2244slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2245{
2246 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2247 api_ready (aTHX_ sv_manager);
2248
2249 frame->prepare = prepare_schedule;
2250 frame->check = slf_check_repeat;
2251
2252 /* as a minor optimisation, we could unwind all stacks here */
2253 /* but that puts extra pressure on pp_slf, and is not worth much */
2254 /*coro_unwind_stacks (aTHX);*/
2255}
2256
2257static void
2258slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2259{
2260 HV *coro_hv = (HV *)SvRV (coro_current);
2261
2262 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2263 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2264}
2265
2266static void
2267slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 HV *coro_hv;
2270 struct coro *coro;
2271
2272 if (items <= 0)
2273 croak ("Coro::cancel called without coro object,");
2274
2275 coro = SvSTATE (arg [0]);
2276 coro_hv = coro->hv;
2277
2278 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2279
2280 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2281 {
2282 /* coro currently busy cancelling something, so just notify it */
2283 coro->slf_frame.data = (void *)coro;
2284
2285 frame->prepare = prepare_nop;
2286 frame->check = slf_check_nop;
2287 }
2288 else if (coro_hv == (HV *)SvRV (coro_current))
2289 {
2290 /* cancelling the current coro is allowed, and equals terminate */
2291 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2292 }
2293 else
2294 {
2295 struct coro *self = SvSTATE_current;
2296
2297 if (!self)
2298 croak ("Coro::cancel called outside of thread content,");
2299
2300 /* otherwise we cancel directly, purely for speed reasons
2301 * unfortunately, this requires some magic trickery, as
2302 * somebody else could cancel us, so we have to fight the cancellation.
2303 * this is ugly, and hopefully fully worth the extra speed.
2304 * besides, I can't get the slow-but-safe version working...
2305 */
2306 slf_frame.data = 0;
2307 self->flags |= CF_NOCANCEL;
2308 coro_state_destroy (aTHX_ coro);
2309 self->flags &= ~CF_NOCANCEL;
2310
2311 if (slf_frame.data)
2312 {
2313 /* while we were busy we have been cancelled, so terminate */
2314 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2315 }
2316 else
2317 {
2318 frame->prepare = prepare_nop;
2319 frame->check = slf_check_nop;
2320 }
2321 }
2322}
2323
2324static int
2325slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2326{
2327 frame->prepare = 0;
2328 coro_unwind_stacks (aTHX);
2329
2330 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2331
2332 return 1;
2333}
2334
2335static int
2336safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2337{
2338 if (coro->cctx)
2339 croak ("coro inside C callback, unable to cancel at this time, caught");
2340
2341 if (coro->flags & CF_NEW)
2342 {
2343 coro_set_status (aTHX_ coro, arg, items);
2344 coro_state_destroy (aTHX_ coro);
2345 }
2346 else
2347 {
2348 if (!coro->slf_frame.prepare)
2349 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2350
2351 slf_destroy (aTHX_ coro);
2352
2353 coro_set_status (aTHX_ coro, arg, items);
2354 coro->slf_frame.prepare = prepare_nop;
2355 coro->slf_frame.check = slf_check_safe_cancel;
2356
2357 api_ready (aTHX_ (SV *)coro->hv);
2358 }
2359
2360 return 1;
2361}
2362
2363/*****************************************************************************/
2364/* async pool handler */
2365
2366static int
2367slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2368{
2369 HV *hv = (HV *)SvRV (coro_current);
2370 struct coro *coro = (struct coro *)frame->data;
2371
2372 if (!coro->invoke_cb)
2373 return 1; /* loop till we have invoke */
2374 else
2375 {
2376 hv_store (hv, "desc", sizeof ("desc") - 1,
2377 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2378
2379 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2380
2381 {
2382 dSP;
2383 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2384 PUTBACK;
873 } 2385 }
874 2386
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2387 SvREFCNT_dec (GvAV (PL_defgv));
2388 GvAV (PL_defgv) = coro->invoke_av;
2389 coro->invoke_av = 0;
2390
2391 return 0;
2392 }
2393}
2394
2395static void
2396slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2397{
2398 HV *hv = (HV *)SvRV (coro_current);
2399 struct coro *coro = SvSTATE_hv ((SV *)hv);
2400
2401 if (ecb_expect_true (coro->saved_deffh))
2402 {
2403 /* subsequent iteration */
2404 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2405 coro->saved_deffh = 0;
2406
2407 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2408 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2409 {
2410 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2411 return;
2412 }
2413 else
2414 {
2415 av_clear (GvAV (PL_defgv));
2416 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2417
2418 coro->prio = 0;
2419
2420 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2421 api_trace (aTHX_ coro_current, 0);
2422
2423 frame->prepare = prepare_schedule;
2424 av_push (av_async_pool, SvREFCNT_inc (hv));
2425 }
2426 }
2427 else
2428 {
2429 /* first iteration, simply fall through */
2430 frame->prepare = prepare_nop;
2431 }
2432
2433 frame->check = slf_check_pool_handler;
2434 frame->data = (void *)coro;
2435}
2436
2437/*****************************************************************************/
2438/* rouse callback */
2439
2440#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2441
2442static void
2443coro_rouse_callback (pTHX_ CV *cv)
2444{
2445 dXSARGS;
2446 SV *data = (SV *)S_GENSUB_ARG;
2447
2448 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2449 {
2450 /* first call, set args */
2451 SV *coro = SvRV (data);
2452 AV *av = newAV ();
2453
2454 SvRV_set (data, (SV *)av);
2455
2456 /* better take a full copy of the arguments */
2457 while (items--)
2458 av_store (av, items, newSVsv (ST (items)));
2459
2460 api_ready (aTHX_ coro);
2461 SvREFCNT_dec (coro);
2462 }
2463
2464 XSRETURN_EMPTY;
2465}
2466
2467static int
2468slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2469{
2470 SV *data = (SV *)frame->data;
2471
2472 if (CORO_THROW)
2473 return 0;
2474
2475 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2476 return 1;
2477
2478 /* now push all results on the stack */
2479 {
2480 dSP;
2481 AV *av = (AV *)SvRV (data);
2482 int i;
2483
2484 EXTEND (SP, AvFILLp (av) + 1);
2485 for (i = 0; i <= AvFILLp (av); ++i)
2486 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2487
2488 /* we have stolen the elements, so set length to zero and free */
2489 AvFILLp (av) = -1;
2490 av_undef (av);
2491
2492 PUTBACK;
2493 }
2494
2495 return 0;
2496}
2497
2498static void
2499slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2500{
2501 SV *cb;
2502
2503 if (items)
2504 cb = arg [0];
2505 else
2506 {
2507 struct coro *coro = SvSTATE_current;
2508
2509 if (!coro->rouse_cb)
2510 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2511
2512 cb = sv_2mortal (coro->rouse_cb);
2513 coro->rouse_cb = 0;
2514 }
2515
2516 if (!SvROK (cb)
2517 || SvTYPE (SvRV (cb)) != SVt_PVCV
2518 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2519 croak ("Coro::rouse_wait called with illegal callback argument,");
2520
2521 {
2522 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2523 SV *data = (SV *)S_GENSUB_ARG;
2524
2525 frame->data = (void *)data;
2526 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2527 frame->check = slf_check_rouse_wait;
2528 }
876} 2529}
877 2530
878static SV * 2531static SV *
879coro_deq (pTHX_ int min_prio) 2532coro_new_rouse_cb (pTHX)
880{ 2533{
881 int prio = PRIO_MAX - PRIO_MIN; 2534 HV *hv = (HV *)SvRV (coro_current);
2535 struct coro *coro = SvSTATE_hv (hv);
2536 SV *data = newRV_inc ((SV *)hv);
2537 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
882 2538
883 min_prio -= PRIO_MIN; 2539 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
884 if (min_prio < 0) 2540 SvREFCNT_dec (data); /* magicext increases the refcount */
885 min_prio = 0;
886 2541
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2542 SvREFCNT_dec (coro->rouse_cb);
888 if (av_len (coro_ready[prio]) >= 0) 2543 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2544
2545 return cb;
2546}
2547
2548/*****************************************************************************/
2549/* schedule-like-function opcode (SLF) */
2550
2551static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2552static const CV *slf_cv;
2553static SV **slf_argv;
2554static int slf_argc, slf_arga; /* count, allocated */
2555static I32 slf_ax; /* top of stack, for restore */
2556
2557/* this restores the stack in the case we patched the entersub, to */
2558/* recreate the stack frame as perl will on following calls */
2559/* since entersub cleared the stack */
2560static OP *
2561pp_restore (pTHX)
2562{
2563 int i;
2564 SV **SP = PL_stack_base + slf_ax;
2565
2566 PUSHMARK (SP);
2567
2568 EXTEND (SP, slf_argc + 1);
2569
2570 for (i = 0; i < slf_argc; ++i)
2571 PUSHs (sv_2mortal (slf_argv [i]));
2572
2573 PUSHs ((SV *)CvGV (slf_cv));
2574
2575 RETURNOP (slf_restore.op_first);
2576}
2577
2578static void
2579slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2580{
2581 SV **arg = (SV **)slf_frame.data;
2582
2583 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2584}
2585
2586static void
2587slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 if (items != 2)
2590 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2591
2592 frame->prepare = slf_prepare_transfer;
2593 frame->check = slf_check_nop;
2594 frame->data = (void *)arg; /* let's hope it will stay valid */
2595}
2596
2597static void
2598slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 frame->prepare = prepare_schedule;
2601 frame->check = slf_check_nop;
2602}
2603
2604static void
2605slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2606{
2607 struct coro *next = (struct coro *)slf_frame.data;
2608
2609 SvREFCNT_inc_NN (next->hv);
2610 prepare_schedule_to (aTHX_ ta, next);
2611}
2612
2613static void
2614slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 if (!items)
2617 croak ("Coro::schedule_to expects a coroutine argument, caught");
2618
2619 frame->data = (void *)SvSTATE (arg [0]);
2620 frame->prepare = slf_prepare_schedule_to;
2621 frame->check = slf_check_nop;
2622}
2623
2624static void
2625slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2626{
2627 api_ready (aTHX_ SvRV (coro_current));
2628
2629 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2630}
2631
2632static void
2633slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2634{
2635 frame->prepare = prepare_cede;
2636 frame->check = slf_check_nop;
2637}
2638
2639static void
2640slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 frame->prepare = prepare_cede_notself;
2643 frame->check = slf_check_nop;
2644}
2645
2646/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2647static void
2648slf_destroy (pTHX_ struct coro *coro)
2649{
2650 struct CoroSLF frame = coro->slf_frame;
2651
2652 /*
2653 * The on_destroy below most likely is from an SLF call.
2654 * Since by definition the SLF call will not finish when we destroy
2655 * the coro, we will have to force-finish it here, otherwise
2656 * cleanup functions cannot call SLF functions.
2657 */
2658 coro->slf_frame.prepare = 0;
2659
2660 /* this callback is reserved for slf functions needing to do cleanup */
2661 if (frame.destroy && frame.prepare && !PL_dirty)
2662 frame.destroy (aTHX_ &frame);
2663}
2664
2665/*
2666 * these not obviously related functions are all rolled into one
2667 * function to increase chances that they all will call transfer with the same
2668 * stack offset
2669 * SLF stands for "schedule-like-function".
2670 */
2671static OP *
2672pp_slf (pTHX)
2673{
2674 I32 checkmark; /* mark SP to see how many elements check has pushed */
2675
2676 /* set up the slf frame, unless it has already been set-up */
2677 /* the latter happens when a new coro has been started */
2678 /* or when a new cctx was attached to an existing coroutine */
2679 if (ecb_expect_true (!slf_frame.prepare))
2680 {
2681 /* first iteration */
2682 dSP;
2683 SV **arg = PL_stack_base + TOPMARK + 1;
2684 int items = SP - arg; /* args without function object */
2685 SV *gv = *sp;
2686
2687 /* do a quick consistency check on the "function" object, and if it isn't */
2688 /* for us, divert to the real entersub */
2689 if (SvTYPE (gv) != SVt_PVGV
2690 || !GvCV (gv)
2691 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2692 return PL_ppaddr[OP_ENTERSUB](aTHX);
2693
2694 if (!(PL_op->op_flags & OPf_STACKED))
2695 {
2696 /* ampersand-form of call, use @_ instead of stack */
2697 AV *av = GvAV (PL_defgv);
2698 arg = AvARRAY (av);
2699 items = AvFILLp (av) + 1;
2700 }
2701
2702 /* now call the init function, which needs to set up slf_frame */
2703 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2704 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2705
2706 /* pop args */
2707 SP = PL_stack_base + POPMARK;
2708
2709 PUTBACK;
2710 }
2711
2712 /* now that we have a slf_frame, interpret it! */
2713 /* we use a callback system not to make the code needlessly */
2714 /* complicated, but so we can run multiple perl coros from one cctx */
2715
2716 do
2717 {
2718 struct coro_transfer_args ta;
2719
2720 slf_frame.prepare (aTHX_ &ta);
2721 TRANSFER (ta, 0);
2722
2723 checkmark = PL_stack_sp - PL_stack_base;
2724 }
2725 while (slf_frame.check (aTHX_ &slf_frame));
2726
2727 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2728
2729 /* exception handling */
2730 if (ecb_expect_false (CORO_THROW))
2731 {
2732 SV *exception = sv_2mortal (CORO_THROW);
2733
2734 CORO_THROW = 0;
2735 sv_setsv (ERRSV, exception);
2736 croak (0);
2737 }
2738
2739 /* return value handling - mostly like entersub */
2740 /* make sure we put something on the stack in scalar context */
2741 if (GIMME_V == G_SCALAR
2742 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2743 {
2744 dSP;
2745 SV **bot = PL_stack_base + checkmark;
2746
2747 if (sp == bot) /* too few, push undef */
2748 bot [1] = &PL_sv_undef;
2749 else /* too many, take last one */
2750 bot [1] = *sp;
2751
2752 SP = bot + 1;
2753
2754 PUTBACK;
2755 }
2756
2757 return NORMAL;
2758}
2759
2760static void
2761api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2762{
2763 int i;
2764 SV **arg = PL_stack_base + ax;
2765 int items = PL_stack_sp - arg + 1;
2766
2767 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2768
2769 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2770 && PL_op->op_ppaddr != pp_slf)
2771 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2772
2773 CvFLAGS (cv) |= CVf_SLF;
2774 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2775 slf_cv = cv;
2776
2777 /* we patch the op, and then re-run the whole call */
2778 /* we have to put the same argument on the stack for this to work */
2779 /* and this will be done by pp_restore */
2780 slf_restore.op_next = (OP *)&slf_restore;
2781 slf_restore.op_type = OP_CUSTOM;
2782 slf_restore.op_ppaddr = pp_restore;
2783 slf_restore.op_first = PL_op;
2784
2785 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2786
2787 if (PL_op->op_flags & OPf_STACKED)
2788 {
2789 if (items > slf_arga)
2790 {
2791 slf_arga = items;
2792 Safefree (slf_argv);
2793 New (0, slf_argv, slf_arga, SV *);
2794 }
2795
2796 slf_argc = items;
2797
2798 for (i = 0; i < items; ++i)
2799 slf_argv [i] = SvREFCNT_inc (arg [i]);
2800 }
2801 else
2802 slf_argc = 0;
2803
2804 PL_op->op_ppaddr = pp_slf;
2805 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2806
2807 PL_op = (OP *)&slf_restore;
2808}
2809
2810/*****************************************************************************/
2811/* dynamic wind */
2812
2813static void
2814on_enterleave_call (pTHX_ SV *cb)
2815{
2816 dSP;
2817
2818 PUSHSTACK;
2819
2820 PUSHMARK (SP);
2821 PUTBACK;
2822 call_sv (cb, G_VOID | G_DISCARD);
2823 SPAGAIN;
2824
2825 POPSTACK;
2826}
2827
2828static SV *
2829coro_avp_pop_and_free (pTHX_ AV **avp)
2830{
2831 AV *av = *avp;
2832 SV *res = av_pop (av);
2833
2834 if (AvFILLp (av) < 0)
2835 {
2836 *avp = 0;
2837 SvREFCNT_dec (av);
2838 }
2839
2840 return res;
2841}
2842
2843static void
2844coro_pop_on_enter (pTHX_ void *coro)
2845{
2846 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2847 SvREFCNT_dec (cb);
2848}
2849
2850static void
2851coro_pop_on_leave (pTHX_ void *coro)
2852{
2853 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2854 on_enterleave_call (aTHX_ sv_2mortal (cb));
2855}
2856
2857static void
2858enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2859{
2860 if (!hook)
2861 return;
2862
2863 if (!*avp)
2864 {
2865 *avp = newAV ();
2866 AvREAL_off (*avp);
2867 }
2868
2869 av_push (*avp, (SV *)hook);
2870 av_push (*avp, (SV *)arg);
2871}
2872
2873static void
2874enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2875{
2876 AV *av = *avp;
2877 int i;
2878
2879 if (!av)
2880 return;
2881
2882 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2883 if (AvARRAY (av)[i] == (SV *)hook)
889 { 2884 {
890 coro_nready--; 2885 if (execute)
891 return av_shift (coro_ready[prio]); 2886 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2887
2888 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2889 av_pop (av);
2890 av_pop (av);
2891 break;
892 } 2892 }
893 2893
2894 if (AvFILLp (av) >= 0)
2895 {
2896 *avp = 0;
2897 SvREFCNT_dec_NN (av);
2898 }
2899}
2900
2901static void
2902api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2903{
2904 struct coro *coro = SvSTATE (coro_sv);
2905
2906 if (SvSTATE_current == coro)
2907 if (enter)
2908 enter (aTHX_ enter_arg);
2909
2910 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2911 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2912}
2913
2914static void
2915api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2916{
2917 struct coro *coro = SvSTATE (coro_sv);
2918
2919 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2920 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2921}
2922
2923static void
2924savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2925{
2926 struct coro *coro = SvSTATE_current;
2927
2928 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2929}
2930
2931static void
2932savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2933{
2934 struct coro *coro = SvSTATE_current;
2935
2936 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2937}
2938
2939static void
2940api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2941{
2942 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2943
2944 /* this ought to be much cheaper than malloc + a single destructor call */
2945 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2946 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2947}
2948
2949/*****************************************************************************/
2950/* PerlIO::cede */
2951
2952typedef struct
2953{
2954 PerlIOBuf base;
2955 NV next, every;
2956} PerlIOCede;
2957
2958static IV ecb_cold
2959PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2960{
2961 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2962
2963 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2964 self->next = nvtime () + self->every;
2965
2966 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2967}
2968
2969static SV * ecb_cold
2970PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2971{
2972 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2973
2974 return newSVnv (self->every);
2975}
2976
2977static IV
2978PerlIOCede_flush (pTHX_ PerlIO *f)
2979{
2980 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2981 double now = nvtime ();
2982
2983 if (now >= self->next)
2984 {
2985 api_cede (aTHX);
2986 self->next = now + self->every;
2987 }
2988
2989 return PerlIOBuf_flush (aTHX_ f);
2990}
2991
2992static PerlIO_funcs PerlIO_cede =
2993{
2994 sizeof(PerlIO_funcs),
2995 "cede",
2996 sizeof(PerlIOCede),
2997 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2998 PerlIOCede_pushed,
2999 PerlIOBuf_popped,
3000 PerlIOBuf_open,
3001 PerlIOBase_binmode,
3002 PerlIOCede_getarg,
3003 PerlIOBase_fileno,
3004 PerlIOBuf_dup,
3005 PerlIOBuf_read,
3006 PerlIOBuf_unread,
3007 PerlIOBuf_write,
3008 PerlIOBuf_seek,
3009 PerlIOBuf_tell,
3010 PerlIOBuf_close,
3011 PerlIOCede_flush,
3012 PerlIOBuf_fill,
3013 PerlIOBase_eof,
3014 PerlIOBase_error,
3015 PerlIOBase_clearerr,
3016 PerlIOBase_setlinebuf,
3017 PerlIOBuf_get_base,
3018 PerlIOBuf_bufsiz,
3019 PerlIOBuf_get_ptr,
3020 PerlIOBuf_get_cnt,
3021 PerlIOBuf_set_ptrcnt,
3022};
3023
3024/*****************************************************************************/
3025/* Coro::Semaphore & Coro::Signal */
3026
3027static SV *
3028coro_waitarray_new (pTHX_ int count)
3029{
3030 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3031 AV *av = newAV ();
3032 SV **ary;
3033
3034 /* unfortunately, building manually saves memory */
3035 Newx (ary, 2, SV *);
3036 AvALLOC (av) = ary;
3037#if PERL_VERSION_ATLEAST (5,10,0)
3038 AvARRAY (av) = ary;
3039#else
3040 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3041 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3042 SvPVX ((SV *)av) = (char *)ary;
3043#endif
3044 AvMAX (av) = 1;
3045 AvFILLp (av) = 0;
3046 ary [0] = newSViv (count);
3047
3048 return newRV_noinc ((SV *)av);
3049}
3050
3051/* semaphore */
3052
3053static void
3054coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3055{
3056 SV *count_sv = AvARRAY (av)[0];
3057 IV count = SvIVX (count_sv);
3058
3059 count += adjust;
3060 SvIVX (count_sv) = count;
3061
3062 /* now wake up as many waiters as are expected to lock */
3063 while (count > 0 && AvFILLp (av) > 0)
3064 {
3065 SV *cb;
3066
3067 /* swap first two elements so we can shift a waiter */
3068 AvARRAY (av)[0] = AvARRAY (av)[1];
3069 AvARRAY (av)[1] = count_sv;
3070 cb = av_shift (av);
3071
3072 if (SvOBJECT (cb))
3073 {
3074 api_ready (aTHX_ cb);
3075 --count;
3076 }
3077 else if (SvTYPE (cb) == SVt_PVCV)
3078 {
3079 dSP;
3080 PUSHMARK (SP);
3081 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3082 PUTBACK;
3083 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3084 }
3085
3086 SvREFCNT_dec_NN (cb);
3087 }
3088}
3089
3090static void
3091coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3092{
3093 /* call $sem->adjust (0) to possibly wake up some other waiters */
3094 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3095}
3096
3097static int
3098slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3099{
3100 AV *av = (AV *)frame->data;
3101 SV *count_sv = AvARRAY (av)[0];
3102 SV *coro_hv = SvRV (coro_current);
3103
3104 frame->destroy = 0;
3105
3106 /* if we are about to throw, don't actually acquire the lock, just throw */
3107 if (ecb_expect_false (CORO_THROW))
3108 {
3109 /* we still might be responsible for the semaphore, so wake up others */
3110 coro_semaphore_adjust (aTHX_ av, 0);
3111
3112 return 0;
3113 }
3114 else if (SvIVX (count_sv) > 0)
3115 {
3116 if (acquire)
3117 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3118 else
3119 coro_semaphore_adjust (aTHX_ av, 0);
3120
3121 return 0;
3122 }
3123 else
3124 {
3125 int i;
3126 /* if we were woken up but can't down, we look through the whole */
3127 /* waiters list and only add us if we aren't in there already */
3128 /* this avoids some degenerate memory usage cases */
3129 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3130 if (AvARRAY (av)[i] == coro_hv)
3131 return 1;
3132
3133 av_push (av, SvREFCNT_inc (coro_hv));
3134 return 1;
3135 }
3136}
3137
3138static int
3139slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3140{
3141 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3142}
3143
3144static int
3145slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3146{
3147 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3148}
3149
3150static void
3151slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3152{
3153 AV *av = (AV *)SvRV (arg [0]);
3154
3155 if (SvIVX (AvARRAY (av)[0]) > 0)
3156 {
3157 frame->data = (void *)av;
3158 frame->prepare = prepare_nop;
3159 }
3160 else
3161 {
3162 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3163
3164 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3165 frame->prepare = prepare_schedule;
3166 /* to avoid race conditions when a woken-up coro gets terminated */
3167 /* we arrange for a temporary on_destroy that calls adjust (0) */
3168 frame->destroy = coro_semaphore_destroy;
3169 }
3170}
3171
3172static void
3173slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3174{
3175 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3176 frame->check = slf_check_semaphore_down;
3177}
3178
3179static void
3180slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3181{
3182 if (items >= 2)
3183 {
3184 /* callback form */
3185 AV *av = (AV *)SvRV (arg [0]);
3186 SV *cb_cv = s_get_cv_croak (arg [1]);
3187
3188 av_push (av, SvREFCNT_inc_NN (cb_cv));
3189
3190 if (SvIVX (AvARRAY (av)[0]) > 0)
3191 coro_semaphore_adjust (aTHX_ av, 0);
3192
3193 frame->prepare = prepare_nop;
3194 frame->check = slf_check_nop;
3195 }
3196 else
3197 {
3198 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3199 frame->check = slf_check_semaphore_wait;
3200 }
3201}
3202
3203/* signal */
3204
3205static void
3206coro_signal_wake (pTHX_ AV *av, int count)
3207{
3208 SvIVX (AvARRAY (av)[0]) = 0;
3209
3210 /* now signal count waiters */
3211 while (count > 0 && AvFILLp (av) > 0)
3212 {
3213 SV *cb;
3214
3215 /* swap first two elements so we can shift a waiter */
3216 cb = AvARRAY (av)[0];
3217 AvARRAY (av)[0] = AvARRAY (av)[1];
3218 AvARRAY (av)[1] = cb;
3219
3220 cb = av_shift (av);
3221
3222 if (SvTYPE (cb) == SVt_PVCV)
3223 {
3224 dSP;
3225 PUSHMARK (SP);
3226 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3227 PUTBACK;
3228 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3229 }
3230 else
3231 {
3232 api_ready (aTHX_ cb);
3233 sv_setiv (cb, 0); /* signal waiter */
3234 }
3235
3236 SvREFCNT_dec_NN (cb);
3237
3238 --count;
3239 }
3240}
3241
3242static int
3243slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3244{
3245 /* if we are about to throw, also stop waiting */
3246 return SvROK ((SV *)frame->data) && !CORO_THROW;
3247}
3248
3249static void
3250slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3251{
3252 AV *av = (AV *)SvRV (arg [0]);
3253
3254 if (items >= 2)
3255 {
3256 SV *cb_cv = s_get_cv_croak (arg [1]);
3257 av_push (av, SvREFCNT_inc_NN (cb_cv));
3258
3259 if (SvIVX (AvARRAY (av)[0]))
3260 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3261
3262 frame->prepare = prepare_nop;
3263 frame->check = slf_check_nop;
3264 }
3265 else if (SvIVX (AvARRAY (av)[0]))
3266 {
3267 SvIVX (AvARRAY (av)[0]) = 0;
3268 frame->prepare = prepare_nop;
3269 frame->check = slf_check_nop;
3270 }
3271 else
3272 {
3273 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3274
3275 av_push (av, waiter);
3276
3277 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3278 frame->prepare = prepare_schedule;
3279 frame->check = slf_check_signal_wait;
3280 }
3281}
3282
3283/*****************************************************************************/
3284/* Coro::AIO */
3285
3286#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3287
3288/* helper storage struct */
3289struct io_state
3290{
3291 int errorno;
3292 I32 laststype; /* U16 in 5.10.0 */
3293 int laststatval;
3294 Stat_t statcache;
3295};
3296
3297static void
3298coro_aio_callback (pTHX_ CV *cv)
3299{
3300 dXSARGS;
3301 AV *state = (AV *)S_GENSUB_ARG;
3302 SV *coro = av_pop (state);
3303 SV *data_sv = newSV (sizeof (struct io_state));
3304
3305 av_extend (state, items - 1);
3306
3307 sv_upgrade (data_sv, SVt_PV);
3308 SvCUR_set (data_sv, sizeof (struct io_state));
3309 SvPOK_only (data_sv);
3310
3311 {
3312 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3313
3314 data->errorno = errno;
3315 data->laststype = PL_laststype;
3316 data->laststatval = PL_laststatval;
3317 data->statcache = PL_statcache;
3318 }
3319
3320 /* now build the result vector out of all the parameters and the data_sv */
3321 {
3322 int i;
3323
3324 for (i = 0; i < items; ++i)
3325 av_push (state, SvREFCNT_inc_NN (ST (i)));
3326 }
3327
3328 av_push (state, data_sv);
3329
3330 api_ready (aTHX_ coro);
3331 SvREFCNT_dec_NN (coro);
3332 SvREFCNT_dec_NN ((AV *)state);
3333}
3334
3335static int
3336slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3337{
3338 AV *state = (AV *)frame->data;
3339
3340 /* if we are about to throw, return early */
3341 /* this does not cancel the aio request, but at least */
3342 /* it quickly returns */
3343 if (CORO_THROW)
3344 return 0;
3345
3346 /* one element that is an RV? repeat! */
3347 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3348 return 1;
3349
3350 /* restore status */
3351 {
3352 SV *data_sv = av_pop (state);
3353 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3354
3355 errno = data->errorno;
3356 PL_laststype = data->laststype;
3357 PL_laststatval = data->laststatval;
3358 PL_statcache = data->statcache;
3359
3360 SvREFCNT_dec_NN (data_sv);
3361 }
3362
3363 /* push result values */
3364 {
3365 dSP;
3366 int i;
3367
3368 EXTEND (SP, AvFILLp (state) + 1);
3369 for (i = 0; i <= AvFILLp (state); ++i)
3370 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3371
3372 PUTBACK;
3373 }
3374
894 return 0; 3375 return 0;
895} 3376}
896 3377
897static void 3378static void
898api_ready (SV *coro) 3379slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
899{ 3380{
900 dTHX; 3381 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
901
902 if (SvROK (coro))
903 coro = SvRV (coro);
904
905 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro));
907 UNLOCK;
908}
909
910static void
911api_schedule (void)
912{
913 dTHX;
914
915 SV *prev, *next;
916
917 LOCK;
918
919 prev = SvRV (GvSV (coro_current)); 3382 SV *coro_hv = SvRV (coro_current);
920 next = coro_deq (aTHX_ PRIO_MIN); 3383 struct coro *coro = SvSTATE_hv (coro_hv);
921 3384
922 if (!next) 3385 /* put our coroutine id on the state arg */
923 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3386 av_push (state, SvREFCNT_inc_NN (coro_hv));
924 3387
925 /* free this only after the transfer */ 3388 /* first see whether we have a non-zero priority and set it as AIO prio */
926 coro_mortal = prev; 3389 if (coro->prio)
927 SV_CORO (prev, "Coro::schedule"); 3390 {
3391 dSP;
928 3392
929 SvRV (GvSV (coro_current)) = next; 3393 static SV *prio_cv;
3394 static SV *prio_sv;
930 3395
931 SV_CORO (next, "Coro::schedule"); 3396 if (ecb_expect_false (!prio_cv))
3397 {
3398 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3399 prio_sv = newSViv (0);
3400 }
932 3401
933 UNLOCK; 3402 PUSHMARK (SP);
3403 sv_setiv (prio_sv, coro->prio);
3404 XPUSHs (prio_sv);
934 3405
935 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3406 PUTBACK;
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3407 call_sv (prio_cv, G_VOID | G_DISCARD);
937} 3408 }
938 3409
939static void 3410 /* now call the original request */
940api_cede (void) 3411 {
941{ 3412 dSP;
942 dTHX; 3413 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3414 int i;
943 3415
944 LOCK; 3416 PUSHMARK (SP);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946 UNLOCK;
947 3417
948 api_schedule (); 3418 /* first push all args to the stack */
949} 3419 EXTEND (SP, items + 1);
950 3420
3421 for (i = 0; i < items; ++i)
3422 PUSHs (arg [i]);
3423
3424 /* now push the callback closure */
3425 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3426
3427 /* now call the AIO function - we assume our request is uncancelable */
3428 PUTBACK;
3429 call_sv ((SV *)req, G_VOID | G_DISCARD);
3430 }
3431
3432 /* now that the request is going, we loop till we have a result */
3433 frame->data = (void *)state;
3434 frame->prepare = prepare_schedule;
3435 frame->check = slf_check_aio_req;
3436}
3437
3438static void
3439coro_aio_req_xs (pTHX_ CV *cv)
3440{
3441 dXSARGS;
3442
3443 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3444
3445 XSRETURN_EMPTY;
3446}
3447
3448/*****************************************************************************/
3449
3450#if CORO_CLONE
3451# include "clone.c"
3452#endif
3453
3454/*****************************************************************************/
3455
3456static SV *
3457coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3458{
3459 SV *coro_sv;
3460 struct coro *coro;
3461 MAGIC *mg;
3462 HV *hv;
3463 SV *cb;
3464 int i;
3465
3466 if (argc > 0)
3467 {
3468 cb = s_get_cv_croak (argv [0]);
3469
3470 if (!is_coro)
3471 {
3472 if (CvISXSUB (cb))
3473 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3474
3475 if (!CvROOT (cb))
3476 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3477 }
3478 }
3479
3480 Newz (0, coro, 1, struct coro);
3481 coro->args = newAV ();
3482 coro->flags = CF_NEW;
3483
3484 if (coro_first) coro_first->prev = coro;
3485 coro->next = coro_first;
3486 coro_first = coro;
3487
3488 coro->hv = hv = newHV ();
3489 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3490 mg->mg_flags |= MGf_DUP;
3491 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3492
3493 if (argc > 0)
3494 {
3495 av_extend (coro->args, argc + is_coro - 1);
3496
3497 if (is_coro)
3498 {
3499 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3500 cb = (SV *)cv_coro_run;
3501 }
3502
3503 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3504
3505 for (i = 1; i < argc; i++)
3506 av_push (coro->args, newSVsv (argv [i]));
3507 }
3508
3509 return coro_sv;
3510}
3511
3512#ifndef __cplusplus
3513ecb_cold XS(boot_Coro__State);
3514#endif
3515
3516#if CORO_JIT
3517
3518static void ecb_noinline ecb_cold
3519pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3520{
3521 dSP;
3522 AV *av = newAV ();
3523
3524 av_store (av, 3, newSVuv (d));
3525 av_store (av, 2, newSVuv (c));
3526 av_store (av, 1, newSVuv (b));
3527 av_store (av, 0, newSVuv (a));
3528
3529 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3530
3531 PUTBACK;
3532}
3533
3534static void ecb_noinline ecb_cold
3535jit_init (pTHX)
3536{
3537 dSP;
3538 SV *load, *save;
3539 char *map_base;
3540 char *load_ptr, *save_ptr;
3541 STRLEN load_len, save_len, map_len;
3542 int count;
3543
3544 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3545
3546 PUSHMARK (SP);
3547 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3548 #include "state.h"
3549 count = call_pv ("Coro::State::_jit", G_ARRAY);
3550 SPAGAIN;
3551
3552 save = POPs; save_ptr = SvPVbyte (save, save_len);
3553 load = POPs; load_ptr = SvPVbyte (load, load_len);
3554
3555 map_len = load_len + save_len + 16;
3556
3557 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3558
3559 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3560
3561 load_perl_slots = (load_save_perl_slots_type)map_base;
3562 memcpy (map_base, load_ptr, load_len);
3563
3564 map_base += (load_len + 15) & ~15;
3565
3566 save_perl_slots = (load_save_perl_slots_type)map_base;
3567 memcpy (map_base, save_ptr, save_len);
3568
3569 /* we are good citizens and try to make the page read-only, so the evil evil */
3570 /* hackers might have it a bit more difficult */
3571 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3572
3573 PUTBACK;
3574 eval_pv ("undef &Coro::State::_jit", 1);
3575}
3576
3577#endif
3578
951MODULE = Coro::State PACKAGE = Coro::State 3579MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952 3580
953PROTOTYPES: ENABLE 3581PROTOTYPES: DISABLE
954 3582
955BOOT: 3583BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 3584{
3585#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3586#include "state.h"
957#ifdef USE_ITHREADS 3587#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 3588# if CORO_PTHREAD
3589 coro_thx = PERL_GET_CONTEXT;
959#endif 3590# endif
3591#endif
3592 /* perl defines these to check for existance first, but why it doesn't */
3593 /* just create them one at init time is not clear to me, except for */
3594 /* programs trying to delete them, but... */
3595 /* anyway, we declare this as invalid and make sure they are initialised here */
3596 DEFSV;
3597 ERRSV;
960 3598
961 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3599 cctx_current = cctx_new_empty ();
962 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3600
3601 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3602 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3603
3604 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3605 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3606 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3607
3608 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3609 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3610
963 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3611 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 3612
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3613 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3614 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3615 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3616 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969 3617
970 main_mainstack = PL_mainstack; 3618 main_mainstack = PL_mainstack;
3619 main_top_env = PL_top_env;
971 3620
3621 while (main_top_env->je_prev)
3622 main_top_env = main_top_env->je_prev;
3623
3624 {
3625 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3626
3627 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3628 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3629
3630 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3631 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3632 }
3633
972 coroapi.ver = CORO_API_VERSION; 3634 coroapi.ver = CORO_API_VERSION;
3635 coroapi.rev = CORO_API_REVISION;
3636
973 coroapi.transfer = api_transfer; 3637 coroapi.transfer = api_transfer;
974}
975 3638
976Coro::State 3639 coroapi.sv_state = SvSTATE_;
977_newprocess(args) 3640 coroapi.execute_slf = api_execute_slf;
978 SV * args 3641 coroapi.prepare_nop = prepare_nop;
3642 coroapi.prepare_schedule = prepare_schedule;
3643 coroapi.prepare_cede = prepare_cede;
3644 coroapi.prepare_cede_notself = prepare_cede_notself;
3645
3646 time_init (aTHX);
3647
3648 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3649#if CORO_JIT
3650 PUTBACK;
3651 jit_init (aTHX);
3652 SPAGAIN;
3653#endif
3654}
3655
3656SV *
3657new (SV *klass, ...)
3658 ALIAS:
3659 Coro::new = 1
3660 CODE:
3661 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3662 OUTPUT:
3663 RETVAL
3664
3665void
3666transfer (...)
3667 PROTOTYPE: $$
3668 CODE:
3669 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3670
3671SV *
3672clone (Coro::State coro)
3673 CODE:
3674{
3675#if CORO_CLONE
3676 struct coro *ncoro = coro_clone (aTHX_ coro);
3677 MAGIC *mg;
3678 /* TODO: too much duplication */
3679 ncoro->hv = newHV ();
3680 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3681 mg->mg_flags |= MGf_DUP;
3682 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3683#else
3684 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3685#endif
3686}
3687 OUTPUT:
3688 RETVAL
3689
3690int
3691cctx_stacksize (int new_stacksize = 0)
3692 PROTOTYPE: ;$
3693 CODE:
3694 RETVAL = cctx_stacksize;
3695 if (new_stacksize)
3696 {
3697 cctx_stacksize = new_stacksize;
3698 ++cctx_gen;
3699 }
3700 OUTPUT:
3701 RETVAL
3702
3703int
3704cctx_max_idle (int max_idle = 0)
3705 PROTOTYPE: ;$
3706 CODE:
3707 RETVAL = cctx_max_idle;
3708 if (max_idle > 1)
3709 cctx_max_idle = max_idle;
3710 OUTPUT:
3711 RETVAL
3712
3713int
3714cctx_count ()
3715 PROTOTYPE:
3716 CODE:
3717 RETVAL = cctx_count;
3718 OUTPUT:
3719 RETVAL
3720
3721int
3722cctx_idle ()
3723 PROTOTYPE:
3724 CODE:
3725 RETVAL = cctx_idle;
3726 OUTPUT:
3727 RETVAL
3728
3729void
3730list ()
3731 PROTOTYPE:
3732 PPCODE:
3733{
3734 struct coro *coro;
3735 for (coro = coro_first; coro; coro = coro->next)
3736 if (coro->hv)
3737 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3738}
3739
3740void
3741call (Coro::State coro, SV *coderef)
3742 ALIAS:
3743 eval = 1
3744 CODE:
3745{
3746 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3747 {
3748 struct coro *current = SvSTATE_current;
3749 struct CoroSLF slf_save;
3750
3751 if (current != coro)
3752 {
3753 PUTBACK;
3754 save_perl (aTHX_ current);
3755 load_perl (aTHX_ coro);
3756 /* the coro is most likely in an active SLF call.
3757 * while not strictly required (the code we execute is
3758 * not allowed to call any SLF functions), it's cleaner
3759 * to reinitialise the slf_frame and restore it later.
3760 * This might one day allow us to actually do SLF calls
3761 * from code executed here.
3762 */
3763 slf_save = slf_frame;
3764 slf_frame.prepare = 0;
3765 SPAGAIN;
3766 }
3767
3768 PUSHSTACK;
3769
3770 PUSHMARK (SP);
3771 PUTBACK;
3772
3773 if (ix)
3774 eval_sv (coderef, 0);
3775 else
3776 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3777
3778 POPSTACK;
3779 SPAGAIN;
3780
3781 if (current != coro)
3782 {
3783 PUTBACK;
3784 slf_frame = slf_save;
3785 save_perl (aTHX_ coro);
3786 load_perl (aTHX_ current);
3787 SPAGAIN;
3788 }
3789 }
3790}
3791
3792SV *
3793is_ready (Coro::State coro)
979 PROTOTYPE: $ 3794 PROTOTYPE: $
3795 ALIAS:
3796 is_ready = CF_READY
3797 is_running = CF_RUNNING
3798 is_new = CF_NEW
3799 is_destroyed = CF_ZOMBIE
3800 is_zombie = CF_ZOMBIE
3801 is_suspended = CF_SUSPENDED
3802 CODE:
3803 RETVAL = boolSV (coro->flags & ix);
3804 OUTPUT:
3805 RETVAL
3806
3807void
3808throw (SV *self, SV *exception = &PL_sv_undef)
3809 PROTOTYPE: $;$
980 CODE: 3810 CODE:
981 Coro__State coro; 3811{
3812 struct coro *coro = SvSTATE (self);
3813 struct coro *current = SvSTATE_current;
3814 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3815 SvREFCNT_dec (*exceptionp);
3816 SvGETMAGIC (exception);
3817 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
982 3818
983 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3819 api_ready (aTHX_ self);
984 croak ("Coro::State::_newprocess expects an arrayref"); 3820}
3821
3822void
3823api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3824 PROTOTYPE: $;$
3825 C_ARGS: aTHX_ coro, flags
3826
3827SV *
3828has_cctx (Coro::State coro)
3829 PROTOTYPE: $
3830 CODE:
3831 /* maybe manage the running flag differently */
3832 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3833 OUTPUT:
3834 RETVAL
3835
3836int
3837is_traced (Coro::State coro)
3838 PROTOTYPE: $
3839 CODE:
3840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3841 OUTPUT:
3842 RETVAL
3843
3844UV
3845rss (Coro::State coro)
3846 PROTOTYPE: $
3847 ALIAS:
3848 usecount = 1
3849 CODE:
3850 switch (ix)
3851 {
3852 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3853 case 1: RETVAL = coro->usecount; break;
985 3854 }
986 Newz (0, coro, 1, struct coro); 3855 OUTPUT:
987
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */
990 /*coro->stack = 0;*/
991
992 /* same as JMPENV_BOOTSTRAP */
993 /* we might be able to recycle start_env, but safe is safe */
994 /*Zero(&coro->start_env, 1, JMPENV);*/
995 coro->start_env.je_ret = -1;
996 coro->start_env.je_mustcatch = TRUE;
997
998 RETVAL = coro; 3856 RETVAL
3857
3858void
3859force_cctx ()
3860 PROTOTYPE:
3861 CODE:
3862 cctx_current->idle_sp = 0;
3863
3864void
3865swap_defsv (Coro::State self)
3866 PROTOTYPE: $
3867 ALIAS:
3868 swap_defav = 1
3869 CODE:
3870 if (!self->slot)
3871 croak ("cannot swap state with coroutine that has no saved state,");
3872 else
3873 {
3874 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3875 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3876
3877 SV *tmp = *src; *src = *dst; *dst = tmp;
3878 }
3879
3880void
3881cancel (Coro::State self)
3882 CODE:
3883 coro_state_destroy (aTHX_ self);
3884
3885SV *
3886enable_times (int enabled = enable_times)
3887 CODE:
3888{
3889 RETVAL = boolSV (enable_times);
3890
3891 if (enabled != enable_times)
3892 {
3893 enable_times = enabled;
3894
3895 coro_times_update ();
3896 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3897 }
3898}
999 OUTPUT: 3899 OUTPUT:
1000 RETVAL 3900 RETVAL
1001 3901
1002void 3902void
1003transfer(prev, next, flags) 3903times (Coro::State self)
1004 SV *prev 3904 PPCODE:
1005 SV *next 3905{
1006 int flags 3906 struct coro *current = SvSTATE (coro_current);
1007 PROTOTYPE: @ 3907
3908 if (ecb_expect_false (current == self))
3909 {
3910 coro_times_update ();
3911 coro_times_add (SvSTATE (coro_current));
3912 }
3913
3914 EXTEND (SP, 2);
3915 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3916 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3917
3918 if (ecb_expect_false (current == self))
3919 coro_times_sub (SvSTATE (coro_current));
3920}
3921
3922void
3923swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3924 CODE:
3925{
3926 struct coro *current = SvSTATE_current;
3927
3928 if (current == coro)
3929 SWAP_SVS (current);
3930
3931 if (!coro->swap_sv)
3932 coro->swap_sv = newAV ();
3933
3934 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3935 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3936
3937 if (current == coro)
3938 SWAP_SVS (current);
3939}
3940
3941
3942MODULE = Coro::State PACKAGE = Coro
3943
3944BOOT:
3945{
3946 if (SVt_LAST > 32)
3947 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
3948
3949 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3950 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3951 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3952 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3953 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3954 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3955 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3956 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3957
3958 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3959 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3960 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3961 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3962
3963 coro_stash = gv_stashpv ("Coro", TRUE);
3964
3965 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3966 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3967 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3968 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3969 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3970 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3971
3972 {
3973 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3974
3975 coroapi.schedule = api_schedule;
3976 coroapi.schedule_to = api_schedule_to;
3977 coroapi.cede = api_cede;
3978 coroapi.cede_notself = api_cede_notself;
3979 coroapi.ready = api_ready;
3980 coroapi.is_ready = api_is_ready;
3981 coroapi.nready = coro_nready;
3982 coroapi.current = coro_current;
3983
3984 coroapi.enterleave_hook = api_enterleave_hook;
3985 coroapi.enterleave_unhook = api_enterleave_unhook;
3986 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
3987
3988 /*GCoroAPI = &coroapi;*/
3989 sv_setiv (sv, (IV)&coroapi);
3990 SvREADONLY_on (sv);
3991 }
3992}
3993
3994SV *
3995async (...)
3996 PROTOTYPE: &@
1008 CODE: 3997 CODE:
1009 PUTBACK; 3998 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1010 SV_CORO (next, "Coro::transfer"); 3999 api_ready (aTHX_ RETVAL);
1011 SV_CORO (prev, "Coro::transfer"); 4000 OUTPUT:
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 4001 RETVAL
1013 SPAGAIN;
1014 4002
1015void 4003void
1016DESTROY(coro) 4004_destroy (Coro::State coro)
1017 Coro::State coro 4005 CODE:
1018 CODE: 4006 /* used by the manager thread */
1019 4007 coro_state_destroy (aTHX_ coro);
1020 if (coro->mainstack && coro->mainstack != main_mainstack)
1021 {
1022 struct coro temp;
1023
1024 PUTBACK;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026 LOAD (aTHX_ coro);
1027 SPAGAIN;
1028
1029 destroy_stacks (aTHX);
1030
1031 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032 SPAGAIN;
1033
1034 coro->mainstack = 0;
1035 }
1036
1037 deallocate_stack (coro);
1038 SvREFCNT_dec (coro->args);
1039 Safefree (coro);
1040 4008
1041void 4009void
1042_exit(code) 4010on_destroy (Coro::State coro, SV *cb)
1043 int code 4011 CODE:
4012 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4013
4014void
4015join (...)
4016 CODE:
4017 CORO_EXECUTE_SLF_XS (slf_init_join);
4018
4019void
4020terminate (...)
4021 CODE:
4022 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4023
4024void
4025cancel (...)
4026 CODE:
4027 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4028
4029int
4030safe_cancel (Coro::State self, ...)
4031 C_ARGS: aTHX_ self, &ST (1), items - 1
4032
4033void
4034schedule (...)
4035 CODE:
4036 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4037
4038void
4039schedule_to (...)
4040 CODE:
4041 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4042
4043void
4044cede_to (...)
4045 CODE:
4046 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4047
4048void
4049cede (...)
4050 CODE:
4051 CORO_EXECUTE_SLF_XS (slf_init_cede);
4052
4053void
4054cede_notself (...)
4055 CODE:
4056 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4057
4058void
4059_set_current (SV *current)
1044 PROTOTYPE: $ 4060 PROTOTYPE: $
1045 CODE: 4061 CODE:
1046 _exit (code); 4062 SvREFCNT_dec_NN (SvRV (coro_current));
1047 4063 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1048MODULE = Coro::State PACKAGE = Coro::Cont
1049
1050# this is slightly dirty (should expose a c-level api)
1051 4064
1052void 4065void
1053yield(...) 4066_set_readyhook (SV *hook)
1054 PROTOTYPE: @ 4067 PROTOTYPE: $
1055 CODE: 4068 CODE:
1056 static SV *returnstk;
1057 SV *sv;
1058 AV *defav = GvAV (PL_defgv);
1059 struct coro *prev, *next;
1060
1061 if (!returnstk)
1062 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064 /* set up @_ -- ugly */
1065 av_clear (defav);
1066 av_fill (defav, items - 1);
1067 while (items--)
1068 av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071 sv = av_pop ((AV *)SvRV (returnstk));
1072 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074 SvREFCNT_dec (sv); 4069 SvREFCNT_dec (coro_readyhook);
1075 4070 SvGETMAGIC (hook);
1076 transfer (aTHX_ prev, next, 0); 4071 if (SvOK (hook))
1077 4072 {
1078MODULE = Coro::State PACKAGE = Coro
1079
1080# this is slightly dirty (should expose a c-level api)
1081
1082BOOT:
1083{
1084 int i;
1085 HV *stash = gv_stashpv ("Coro", TRUE);
1086
1087 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093
1094 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096
1097 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098 coro_ready[i] = newAV (); 4073 coro_readyhook = newSVsv (hook);
1099 4074 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1100 {
1101 SV *sv = perl_get_sv("Coro::API", 1);
1102
1103 coroapi.schedule = api_schedule;
1104 coroapi.cede = api_cede;
1105 coroapi.ready = api_ready;
1106 coroapi.nready = &coro_nready;
1107 coroapi.current = coro_current;
1108
1109 GCoroAPI = &coroapi;
1110 sv_setiv(sv, (IV)&coroapi);
1111 SvREADONLY_on(sv);
1112 } 4075 }
1113} 4076 else
4077 {
4078 coro_readyhook = 0;
4079 CORO_READYHOOK = 0;
4080 }
1114 4081
1115#if !PERL_MICRO 4082int
4083prio (Coro::State coro, int newprio = 0)
4084 PROTOTYPE: $;$
4085 ALIAS:
4086 nice = 1
4087 CODE:
4088{
4089 RETVAL = coro->prio;
1116 4090
1117void 4091 if (items > 1)
4092 {
4093 if (ix)
4094 newprio = coro->prio - newprio;
4095
4096 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4097 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4098
4099 coro->prio = newprio;
4100 }
4101}
4102 OUTPUT:
4103 RETVAL
4104
4105SV *
1118ready(self) 4106ready (SV *self)
1119 SV * self
1120 PROTOTYPE: $ 4107 PROTOTYPE: $
1121 CODE: 4108 CODE:
1122 api_ready (self); 4109 RETVAL = boolSV (api_ready (aTHX_ self));
1123 4110 OUTPUT:
1124#endif 4111 RETVAL
1125 4112
1126int 4113int
1127nready(...) 4114nready (...)
1128 PROTOTYPE: 4115 PROTOTYPE:
1129 CODE: 4116 CODE:
1130 RETVAL = coro_nready; 4117 RETVAL = coro_nready;
1131 OUTPUT: 4118 OUTPUT:
1132 RETVAL 4119 RETVAL
1133 4120
1134void 4121void
1135schedule(...) 4122suspend (Coro::State self)
1136 PROTOTYPE: 4123 PROTOTYPE: $
1137 CODE: 4124 CODE:
1138 api_schedule (); 4125 self->flags |= CF_SUSPENDED;
1139 4126
1140void 4127void
1141cede(...) 4128resume (Coro::State self)
1142 PROTOTYPE: 4129 PROTOTYPE: $
1143 CODE: 4130 CODE:
4131 self->flags &= ~CF_SUSPENDED;
4132
4133void
4134_pool_handler (...)
4135 CODE:
4136 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4137
4138void
4139async_pool (SV *cv, ...)
4140 PROTOTYPE: &@
4141 PPCODE:
4142{
4143 HV *hv = (HV *)av_pop (av_async_pool);
4144 AV *av = newAV ();
4145 SV *cb = ST (0);
4146 int i;
4147
4148 av_extend (av, items - 2);
4149 for (i = 1; i < items; ++i)
4150 av_push (av, SvREFCNT_inc_NN (ST (i)));
4151
4152 if ((SV *)hv == &PL_sv_undef)
4153 {
4154 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4155 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4156 SvREFCNT_dec_NN (sv);
4157 }
4158
4159 {
4160 struct coro *coro = SvSTATE_hv (hv);
4161
4162 assert (!coro->invoke_cb);
4163 assert (!coro->invoke_av);
4164 coro->invoke_cb = SvREFCNT_inc (cb);
4165 coro->invoke_av = av;
4166 }
4167
4168 api_ready (aTHX_ (SV *)hv);
4169
4170 if (GIMME_V != G_VOID)
4171 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4172 else
4173 SvREFCNT_dec_NN (hv);
4174}
4175
4176SV *
4177rouse_cb ()
4178 PROTOTYPE:
4179 CODE:
4180 RETVAL = coro_new_rouse_cb (aTHX);
4181 OUTPUT:
4182 RETVAL
4183
4184void
4185rouse_wait (...)
4186 PROTOTYPE: ;$
4187 PPCODE:
4188 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4189
4190void
4191on_enter (SV *block)
4192 ALIAS:
4193 on_leave = 1
4194 PROTOTYPE: &
4195 CODE:
4196{
4197 struct coro *coro = SvSTATE_current;
4198 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4199
4200 block = s_get_cv_croak (block);
4201
4202 if (!*avp)
4203 *avp = newAV ();
4204
4205 av_push (*avp, SvREFCNT_inc (block));
4206
4207 if (!ix)
4208 on_enterleave_call (aTHX_ block);
4209
4210 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4211 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4212 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4213}
4214
4215
4216MODULE = Coro::State PACKAGE = PerlIO::cede
4217
4218BOOT:
4219 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4220
4221
4222MODULE = Coro::State PACKAGE = Coro::Semaphore
4223
4224SV *
4225new (SV *klass, SV *count = 0)
4226 CODE:
4227{
4228 int semcnt = 1;
4229
4230 if (count)
4231 {
4232 SvGETMAGIC (count);
4233
4234 if (SvOK (count))
4235 semcnt = SvIV (count);
4236 }
4237
4238 RETVAL = sv_bless (
4239 coro_waitarray_new (aTHX_ semcnt),
4240 GvSTASH (CvGV (cv))
4241 );
4242}
4243 OUTPUT:
4244 RETVAL
4245
4246# helper for Coro::Channel and others
4247SV *
4248_alloc (int count)
4249 CODE:
4250 RETVAL = coro_waitarray_new (aTHX_ count);
4251 OUTPUT:
4252 RETVAL
4253
4254SV *
4255count (SV *self)
4256 CODE:
4257 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4258 OUTPUT:
4259 RETVAL
4260
4261void
4262up (SV *self, int adjust = 1)
4263 ALIAS:
4264 adjust = 1
4265 CODE:
4266 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4267
4268void
4269down (...)
4270 CODE:
4271 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4272
4273void
4274wait (...)
4275 CODE:
4276 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4277
4278void
4279try (SV *self)
4280 PPCODE:
4281{
4282 AV *av = (AV *)SvRV (self);
4283 SV *count_sv = AvARRAY (av)[0];
4284 IV count = SvIVX (count_sv);
4285
4286 if (count > 0)
4287 {
4288 --count;
4289 SvIVX (count_sv) = count;
4290 XSRETURN_YES;
4291 }
4292 else
4293 XSRETURN_NO;
4294}
4295
4296void
4297waiters (SV *self)
4298 PPCODE:
4299{
4300 AV *av = (AV *)SvRV (self);
4301 int wcount = AvFILLp (av) + 1 - 1;
4302
4303 if (GIMME_V == G_SCALAR)
4304 XPUSHs (sv_2mortal (newSViv (wcount)));
4305 else
4306 {
4307 int i;
4308 EXTEND (SP, wcount);
4309 for (i = 1; i <= wcount; ++i)
4310 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4311 }
4312}
4313
4314MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4315
4316void
4317_may_delete (SV *sem, int count, unsigned int extra_refs)
4318 PPCODE:
4319{
4320 AV *av = (AV *)SvRV (sem);
4321
4322 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4323 && AvFILLp (av) == 0 /* no waiters, just count */
4324 && SvIV (AvARRAY (av)[0]) == count)
4325 XSRETURN_YES;
4326
4327 XSRETURN_NO;
4328}
4329
4330MODULE = Coro::State PACKAGE = Coro::Signal
4331
4332SV *
4333new (SV *klass)
4334 CODE:
4335 RETVAL = sv_bless (
4336 coro_waitarray_new (aTHX_ 0),
4337 GvSTASH (CvGV (cv))
4338 );
4339 OUTPUT:
4340 RETVAL
4341
4342void
4343wait (...)
4344 CODE:
4345 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4346
4347void
4348broadcast (SV *self)
4349 CODE:
4350{
4351 AV *av = (AV *)SvRV (self);
4352 coro_signal_wake (aTHX_ av, AvFILLp (av));
4353}
4354
4355void
4356send (SV *self)
4357 CODE:
4358{
4359 AV *av = (AV *)SvRV (self);
4360
4361 if (AvFILLp (av))
4362 coro_signal_wake (aTHX_ av, 1);
4363 else
4364 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4365}
4366
4367IV
4368awaited (SV *self)
4369 CODE:
4370 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4371 OUTPUT:
4372 RETVAL
4373
4374
4375MODULE = Coro::State PACKAGE = Coro::AnyEvent
4376
4377BOOT:
4378 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4379
4380void
4381_schedule (...)
4382 CODE:
4383{
4384 static int incede;
4385
1144 api_cede (); 4386 api_cede_notself (aTHX);
1145 4387
4388 ++incede;
4389 while (coro_nready >= incede && api_cede (aTHX))
4390 ;
4391
4392 sv_setsv (sv_activity, &PL_sv_undef);
4393 if (coro_nready >= incede)
4394 {
4395 PUSHMARK (SP);
4396 PUTBACK;
4397 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4398 }
4399
4400 --incede;
4401}
4402
4403
4404MODULE = Coro::State PACKAGE = Coro::AIO
4405
4406void
4407_register (char *target, char *proto, SV *req)
4408 CODE:
4409{
4410 SV *req_cv = s_get_cv_croak (req);
4411 /* newXSproto doesn't return the CV on 5.8 */
4412 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4413 sv_setpv ((SV *)slf_cv, proto);
4414 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4415}
4416
4417MODULE = Coro::State PACKAGE = Coro::Select
4418
4419void
4420patch_pp_sselect ()
4421 CODE:
4422 if (!coro_old_pp_sselect)
4423 {
4424 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4425 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4426 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4427 }
4428
4429void
4430unpatch_pp_sselect ()
4431 CODE:
4432 if (coro_old_pp_sselect)
4433 {
4434 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4435 coro_old_pp_sselect = 0;
4436 }
4437
4438MODULE = Coro::State PACKAGE = Coro::Util
4439
4440void
4441_exit (int code)
4442 CODE:
4443 _exit (code);
4444
4445NV
4446time ()
4447 CODE:
4448 RETVAL = nvtime (aTHX);
4449 OUTPUT:
4450 RETVAL
4451
4452NV
4453gettimeofday ()
4454 PPCODE:
4455{
4456 UV tv [2];
4457 u2time (aTHX_ tv);
4458 EXTEND (SP, 2);
4459 PUSHs (sv_2mortal (newSVuv (tv [0])));
4460 PUSHs (sv_2mortal (newSVuv (tv [1])));
4461}
4462

Diff Legend

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