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Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.463 by root, Wed Jun 22 20:37:27 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
10# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
11# define PL_ppaddr ppaddr 20#include "ecb.h"
12# endif
13# ifndef call_sv
14# define call_sv perl_call_sv
15# endif
16# ifndef get_sv
17# define get_sv perl_get_sv
18# endif
19# ifndef get_cv
20# define get_cv perl_get_cv
21# endif
22# ifndef IS_PADGV
23# define IS_PADGV(v) 0
24# endif
25# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0
27# endif
28#endif
29 21
22#include <stddef.h>
30#include <stdio.h> 23#include <stdio.h>
31#include <errno.h> 24#include <errno.h>
32
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD
35#endif
36
37#ifndef STACKGUARD
38# define STACKGUARD 0
39#endif
40
41#ifdef HAVE_MMAP
42# include <unistd.h> 25#include <assert.h>
43# include <sys/mman.h> 26
44# ifndef MAP_ANONYMOUS 27#ifndef SvREFCNT_dec_NN
45# ifdef MAP_ANON 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# endif 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;
50# endif 47# endif
51# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
52# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
53# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
55static long pagesize; 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 */
56# else 74#else
57# define BOOT_PAGESIZE 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;
58# endif 108# endif
59#endif 109#endif
60 110
61/* The next macro should declare a variable stacklevel that contains and approximation 111#ifdef __linux
62 * to the current C stack pointer. Its property is that it changes with each call 112# include <time.h> /* for timespec */
63 * and should be unique. */ 113# include <syscall.h> /* for SYS_* */
64#define dSTACKLEVEL int stacklevel 114# ifdef SYS_clock_gettime
65#define STACKLEVEL ((void *)&stacklevel) 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
66 116# define CORO_CLOCK_MONOTONIC 1
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
68
69#include "CoroAPI.h"
70
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif 118# endif
119#endif
81 120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
128
129static U32 cctx_gen;
130static size_t cctx_stacksize = CORO_STACKSIZE;
82static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
83static 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;
84static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
85static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
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};
86 175
87/* this is a structure representing a c-level coroutine */ 176/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 177typedef struct coro_cctx
178{
89 struct coro_stack *next; 179 struct coro_cctx *next;
90 180
91 /* the stack */ 181 /* the stack */
92 void *sptr; 182 struct coro_stack stack;
93 long ssize; /* positive == mmap, otherwise malloc */
94 183
95 /* cpu state */ 184 /* cpu state */
96 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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
97 JMPENV *top_env; 189 JMPENV *top_env;
98 coro_context cctx; 190 coro_context cctx;
99} coro_stack; 191
192 U32 gen;
193#if CORO_USE_VALGRIND
194 int valgrind_id;
195#endif
196 unsigned char flags;
197} coro_cctx;
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))
100 224
101/* this is a structure representing a perl-level coroutine */ 225/* this is a structure representing a perl-level coroutine */
102struct coro { 226struct coro
227{
103 /* the c coroutine allocated to this perl coroutine, if any */ 228 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 229 coro_cctx *cctx;
105 230
106 /* data associated with this coroutine (initial args) */ 231 /* ready queue */
107 AV *args; 232 struct coro *next_ready;
108 int refcnt;
109 233
110 /* optionally saved, might be zero */ 234 /* state data */
111 AV *defav; 235 struct CoroSLF slf_frame; /* saved slf frame */
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 236 AV *mainstack;
123 SV **stack_sp; 237 perl_slots *slot; /* basically the saved sp */
124 OP *op; 238
125 SV **curpad; 239 CV *startcv; /* the CV to execute */
126 AV *comppad; 240 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 241 int flags; /* CF_ flags */
128 SV **stack_base; 242 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 243
130 SV **tmps_stack; 244 /* statistics */
131 I32 tmps_floor; 245 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 246
149 /* coro process data */ 247 /* coro process data */
150 int prio; 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;
151}; 271};
152 272
153typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
155 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
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... */
156static AV * 327static OP *
328coro_pp_sselect (pTHX)
329{
330 dSP;
331 PUSHMARK (SP - 4); /* fake argument list */
332 XPUSHs (coro_select_select);
333 PUTBACK;
334
335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
336 PL_op->op_flags |= OPf_STACKED;
337 PL_op->op_private = 0;
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{
376 SV **svp;
377
378 require_pv ("Time/HiRes.pm");
379
380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
381
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 *
157coro_clone_padlist (CV *cv) 531coro_derive_padlist (pTHX_ CV *cv)
158{ 532{
159 AV *padlist = CvPADLIST (cv); 533 PADLIST *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
161 538
162 newpadlist = newAV (); 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. */
163 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 568#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist);
171 569
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 570 /* Already extended to 2 elements by newPADLIST. */
173 av_store (newpadlist, 1, (SV *)newpad); 571 PadlistMAX (newpadlist) = 1;
572
573 padnames = PadlistNAMES (padlist);
574 ++PadnamelistREFCNT (padnames);
575 PadlistNAMES (newpadlist) = padnames;
576
577 PadlistARRAY (newpadlist)[1] = newpad;
174 578
175 return newpadlist; 579 return newpadlist;
176} 580}
177 581
178static void 582ecb_inline void
179free_padlist (AV *padlist) 583free_padlist (pTHX_ PADLIST *padlist)
180{ 584{
181 /* may be during global destruction */ 585 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 586 if (!IN_DESTRUCT)
183 { 587 {
184 I32 i = AvFILLp (padlist); 588 I32 i = PadlistMAX (padlist);
185 while (i >= 0) 589
590 while (i > 0) /* special-case index 0 */
186 { 591 {
187 SV **svp = av_fetch (padlist, i--, FALSE); 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
594
188 if (svp) 595 if (pad)
189 { 596 {
190 SV *sv; 597 I32 j = PadMAX (pad);
191 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 598
599 while (j >= 0)
192 SvREFCNT_dec (sv); 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
193 601
602 PadMAX (pad) = -1;
194 SvREFCNT_dec (*svp); 603 SvREFCNT_dec (pad);
195 } 604 }
196 } 605 }
197 606
607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
608
609#if NEWPADAPI
610 Safefree (PadlistARRAY (padlist));
611 Safefree (padlist);
612#else
613 AvFILLp (padlist) = -1;
614 AvREAL_off (padlist);
198 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
199 } 617 }
200} 618}
201 619
202static int 620static int
203coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
204{ 622{
205 AV *padlist; 623 PADLIST *padlist;
206 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;
207 626
208 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
210 free_padlist (padlist); 632 free_padlist (aTHX_ padlists[len]);
211
212 SvREFCNT_dec (av);
213 633
214 return 0; 634 return 0;
215} 635}
216 636
217#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
218 638 0, 0, 0, 0,
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
640};
220 641
221/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
222static void 643ecb_inline void
223get_padlist (CV *cv) 644get_padlist (pTHX_ CV *cv)
224{ 645{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
647 size_t *lenp;
226 648
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
229 else 651 else
230 { 652 {
231#if 0 653#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 656 CV *cp = Perl_cv_clone (aTHX_ cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 657 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 658 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 659 SvREFCNT_dec (cp);
237#else 660#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
239#endif 662#endif
240 } 663 }
241} 664}
242 665
243static void 666ecb_inline void
244put_padlist (CV *cv) 667put_padlist (pTHX_ CV *cv)
245{ 668{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
247 670
248 if (!mg) 671 if (ecb_expect_false (!mg))
249 {
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 } 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);
255 681
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
257} 683}
258 684
259#define SB do { 685/** load & save, init *******************************************************/
260#define SE } while (0)
261 686
262#define LOAD(state) load_state((state)); 687ecb_inline void
263#define SAVE(state,flags) save_state((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;
264 692
265#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);
266 695
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 */
267static void 730static void
731swap_svs_enter (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
739static void
740swap_svs_leave (pTHX_ Coro__State c)
741{
742 int i;
743
744 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
745 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
746}
747
748#define SWAP_SVS_ENTER(coro) \
749 if (ecb_expect_false ((coro)->swap_sv)) \
750 swap_svs_enter (aTHX_ (coro))
751
752#define SWAP_SVS_LEAVE(coro) \
753 if (ecb_expect_false ((coro)->swap_sv)) \
754 swap_svs_leave (aTHX_ (coro))
755
756static void
757on_enterleave_call (pTHX_ SV *cb);
758
759static void
268load_state(Coro__State c) 760load_perl (pTHX_ Coro__State c)
269{ 761{
270 PL_dowarn = c->dowarn; 762 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 763 c->slot = 0;
272 764
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 765 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 766
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 767#if CORO_JIT
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 768 load_perl_slots (slot);
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 769#else
770 #define VARx(name,expr,type) expr = slot->name;
771 #include "state.h"
772#endif
307 773
308 { 774 {
309 dSP; 775 dSP;
776
310 CV *cv; 777 CV *cv;
311 778
312 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
314 { 781 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 783 CvDEPTH (cv) = PTR2IV (POPs);
321 } 784 CvPADLIST (cv) = (PADLIST *)POPs;
322
323 ++CvDEPTH(cv);
324 } 785 }
325 786
326 PUTBACK; 787 PUTBACK;
327 } 788 }
328}
329 789
790 slf_frame = c->slf_frame;
791 CORO_THROW = c->except;
792
793 if (ecb_expect_false (enable_times))
794 {
795 if (ecb_expect_false (!times_valid))
796 coro_times_update ();
797
798 coro_times_sub (c);
799 }
800
801 if (ecb_expect_false (c->on_enter))
802 {
803 int i;
804
805 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
806 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
807 }
808
809 if (ecb_expect_false (c->on_enter_xs))
810 {
811 int i;
812
813 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
815 }
816
817 SWAP_SVS_ENTER (c);
818}
819
330static void 820static void
331save_state(Coro__State c, int flags) 821save_perl (pTHX_ Coro__State c)
332{ 822{
823 SWAP_SVS_LEAVE (c);
824
825 if (ecb_expect_false (c->on_leave_xs))
826 {
827 int i;
828
829 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
830 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
831 }
832
833 if (ecb_expect_false (c->on_leave))
834 {
835 int i;
836
837 for (i = AvFILLp (c->on_leave); i >= 0; --i)
838 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
839 }
840
841 times_valid = 0;
842
843 if (ecb_expect_false (enable_times))
844 {
845 coro_times_update (); times_valid = 1;
846 coro_times_add (c);
847 }
848
849 c->except = CORO_THROW;
850 c->slf_frame = slf_frame;
851
333 { 852 {
334 dSP; 853 dSP;
335 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 858 /*
340 * the worst thing you can imagine happens first - we have to save 859 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 860 * (and reinitialize) all cv's in the whole callchain :(
342 */ 861 */
343 862
344 PUSHs (Nullsv); 863 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
346 for (;;) 865 for (;;)
347 { 866 {
348 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
349 { 868 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
351 870
352 if (CxTYPE(cx) == CXt_SUB) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
353 { 872 {
354 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
874
355 if (CvDEPTH(cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
356 { 876 {
357 EXTEND (SP, CvDEPTH(cv)*2); 877 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
368 881
882 CvDEPTH (cv) = 0;
369 get_padlist (cv); 883 get_padlist (aTHX_ cv);
370 } 884 }
371 } 885 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 886 }
381 887
382 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 889 break;
384 890
385 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
388 } 894 }
389 895
390 PUTBACK; 896 PUTBACK;
391 } 897 }
392 898
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 899 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 901 {
902 unsigned int i;
396 903
397 c->dowarn = PL_dowarn; 904 for (i = 0; i < SLOT_COUNT; ++i)
398 c->in_eval = PL_in_eval; 905 CXINC;
399 906
400 c->curstackinfo = PL_curstackinfo; 907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
401 c->curstack = PL_curstack; 908 }
909
402 c->mainstack = PL_mainstack; 910 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 911
404 c->op = PL_op; 912 {
405 c->curpad = PL_curpad; 913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 914
407 c->compcv = PL_compcv; 915#if CORO_JIT
408 c->stack_base = PL_stack_base; 916 save_perl_slots (slot);
409 c->stack_max = PL_stack_max; 917#else
410 c->tmps_stack = PL_tmps_stack; 918 #define VARx(name,expr,type) slot->name = expr;
411 c->tmps_floor = PL_tmps_floor; 919 #include "state.h"
412 c->tmps_ix = PL_tmps_ix;
413 c->tmps_max = PL_tmps_max;
414 c->markstack = PL_markstack;
415 c->markstack_ptr = PL_markstack_ptr;
416 c->markstack_max = PL_markstack_max;
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif 920#endif
428 c->curpm = PL_curpm; 921 }
429 c->curcop = PL_curcop;
430} 922}
431 923
432/* 924/*
433 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
437 */ 929 */
930#if CORO_PREFER_PERL_FUNCTIONS
931# define coro_init_stacks(thx) init_stacks ()
932#else
438static void 933static void
439coro_init_stacks () 934coro_init_stacks (pTHX)
440{ 935{
441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
442 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
443 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445 940
446 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
447 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449 944
450 New(50,PL_tmps_stack,96,SV*); 945 New(50,PL_tmps_stack,32,SV*);
451 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
452 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
453 PL_tmps_max = 96; 948 PL_tmps_max = 32;
454 949
455 New(54,PL_markstack,16,I32); 950 New(54,PL_markstack,16,I32);
456 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
457 PL_markstack_max = PL_markstack + 16; 952 PL_markstack_max = PL_markstack + 16;
458 953
459#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
460 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
461#endif 956#endif
462 957
463 New(54,PL_scopestack,16,I32); 958 New(54,PL_scopestack,8,I32);
464 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
465 PL_scopestack_max = 16; 960 PL_scopestack_max = 8;
961#if HAS_SCOPESTACK_NAME
962 New(54,PL_scopestack_name,8,const char*);
963#endif
466 964
467 New(54,PL_savestack,96,ANY); 965 New(54,PL_savestack,24,ANY);
468 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
469 PL_savestack_max = 96; 967 PL_savestack_max = 24;
968#if !PERL_VERSION_ATLEAST (5,24,0)
969 /* perl 5.24 moves SS_MAXPUSH optimisation from */
970 /* the header macros to PL_savestack_max */
971 PL_savestack_max -= SS_MAXPUSH;
972#endif
470 973
471#if PERL_VERSION < 9 974#if !PERL_VERSION_ATLEAST (5,10,0)
472 New(54,PL_retstack,8,OP*); 975 New(54,PL_retstack,4,OP*);
473 PL_retstack_ix = 0; 976 PL_retstack_ix = 0;
474 PL_retstack_max = 8; 977 PL_retstack_max = 4;
475#endif 978#endif
476} 979}
980#endif
477 981
478/* 982/*
479 * destroy the stacks, the callchain etc... 983 * destroy the stacks, the callchain etc...
480 */ 984 */
481static void 985static void
482destroy_stacks() 986coro_destruct_stacks (pTHX)
483{ 987{
484 if (!IN_DESTRUCT)
485 {
486 /* is this ugly, I ask? */
487 LEAVE_SCOPE (0);
488
489 /* sure it is, but more important: is it correct?? :/ */
490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
494
495 while (PL_curstackinfo->si_next) 988 while (PL_curstackinfo->si_next)
496 PL_curstackinfo = PL_curstackinfo->si_next; 989 PL_curstackinfo = PL_curstackinfo->si_next;
497 990
498 while (PL_curstackinfo) 991 while (PL_curstackinfo)
499 { 992 {
500 PERL_SI *p = PL_curstackinfo->si_prev; 993 PERL_SI *p = PL_curstackinfo->si_prev;
501 994
502 { /*D*//*remove*/
503 dSP;
504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505 PUTBACK; /* possibly superfluous */
506 }
507
508 if (!IN_DESTRUCT) 995 if (!IN_DESTRUCT)
509 {
510 dounwind (-1);/*D*//*remove*/
511 SvREFCNT_dec (PL_curstackinfo->si_stack); 996 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513 997
514 Safefree (PL_curstackinfo->si_cxstack); 998 Safefree (PL_curstackinfo->si_cxstack);
515 Safefree (PL_curstackinfo); 999 Safefree (PL_curstackinfo);
516 PL_curstackinfo = p; 1000 PL_curstackinfo = p;
517 } 1001 }
518 1002
519 Safefree (PL_tmps_stack); 1003 Safefree (PL_tmps_stack);
520 Safefree (PL_markstack); 1004 Safefree (PL_markstack);
521 Safefree (PL_scopestack); 1005 Safefree (PL_scopestack);
1006#if HAS_SCOPESTACK_NAME
1007 Safefree (PL_scopestack_name);
1008#endif
522 Safefree (PL_savestack); 1009 Safefree (PL_savestack);
523#if PERL_VERSION < 9 1010#if !PERL_VERSION_ATLEAST (5,10,0)
524 Safefree (PL_retstack); 1011 Safefree (PL_retstack);
525#endif 1012#endif
526} 1013}
527 1014
1015#define CORO_RSS \
1016 rss += sizeof (SYM (curstackinfo)); \
1017 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1018 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1019 rss += SYM (tmps_max) * sizeof (SV *); \
1020 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1021 rss += SYM (scopestack_max) * sizeof (I32); \
1022 rss += SYM (savestack_max) * sizeof (ANY);
1023
1024static size_t
1025coro_rss (pTHX_ struct coro *coro)
1026{
1027 size_t rss = sizeof (*coro);
1028
1029 if (coro->mainstack)
1030 {
1031 if (coro->flags & CF_RUNNING)
1032 {
1033 #define SYM(sym) PL_ ## sym
1034 CORO_RSS;
1035 #undef SYM
1036 }
1037 else
1038 {
1039 #define SYM(sym) coro->slot->sym
1040 CORO_RSS;
1041 #undef SYM
1042 }
1043 }
1044
1045 return rss;
1046}
1047
1048/** coroutine stack handling ************************************************/
1049
1050static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1051static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1052static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1053
1054/* apparently < 5.8.8 */
1055#ifndef MgPV_nolen_const
1056#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1057 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1058 (const char*)(mg)->mg_ptr)
1059#endif
1060
1061/*
1062 * This overrides the default magic get method of %SIG elements.
1063 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1064 * and instead of trying to save and restore the hash elements (extremely slow),
1065 * we just provide our own readback here.
1066 */
1067static int ecb_cold
1068coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1069{
1070 const char *s = MgPV_nolen_const (mg);
1071
1072 if (*s == '_')
1073 {
1074 SV **svp = 0;
1075
1076 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1077 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1078
1079 if (svp)
1080 {
1081 SV *ssv;
1082
1083 if (!*svp)
1084 ssv = &PL_sv_undef;
1085 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1086 ssv = sv_2mortal (newRV_inc (*svp));
1087 else
1088 ssv = *svp;
1089
1090 sv_setsv (sv, ssv);
1091 return 0;
1092 }
1093 }
1094
1095 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1096}
1097
1098static int ecb_cold
1099coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1100{
1101 const char *s = MgPV_nolen_const (mg);
1102
1103 if (*s == '_')
1104 {
1105 SV **svp = 0;
1106
1107 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1108 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1109
1110 if (svp)
1111 {
1112 SV *old = *svp;
1113 *svp = 0;
1114 SvREFCNT_dec (old);
1115 return 0;
1116 }
1117 }
1118
1119 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1120}
1121
1122static int ecb_cold
1123coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1124{
1125 const char *s = MgPV_nolen_const (mg);
1126
1127 if (*s == '_')
1128 {
1129 SV **svp = 0;
1130
1131 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1132 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1133
1134 if (svp)
1135 {
1136 SV *old = *svp;
1137 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1138 SvREFCNT_dec (old);
1139 return 0;
1140 }
1141 }
1142
1143 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1144}
1145
1146static void
1147prepare_nop (pTHX_ struct coro_transfer_args *ta)
1148{
1149 /* kind of mega-hacky, but works */
1150 ta->next = ta->prev = (struct coro *)ta;
1151}
1152
528static void 1153static int
529setup_coro (struct coro *coro) 1154slf_check_nop (pTHX_ struct CoroSLF *frame)
1155{
1156 return 0;
1157}
1158
1159static int
1160slf_check_repeat (pTHX_ struct CoroSLF *frame)
1161{
1162 return 1;
1163}
1164
1165static UNOP init_perl_op;
1166
1167ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1168init_perl (pTHX_ struct coro *coro)
530{ 1169{
531 /* 1170 /*
532 * emulate part of the perl startup here. 1171 * emulate part of the perl startup here.
533 */ 1172 */
1173 coro_init_stacks (aTHX);
1174
1175 PL_runops = RUNOPS_DEFAULT;
1176 PL_curcop = &PL_compiling;
1177 PL_in_eval = EVAL_NULL;
1178 PL_comppad = 0;
1179 PL_comppad_name = 0;
1180 PL_comppad_name_fill = 0;
1181 PL_comppad_name_floor = 0;
1182 PL_curpm = 0;
1183 PL_curpad = 0;
1184 PL_localizing = 0;
1185 PL_restartop = 0;
1186#if PERL_VERSION_ATLEAST (5,10,0)
1187 PL_parser = 0;
1188#endif
1189 PL_hints = 0;
1190
1191 /* recreate the die/warn hooks */
1192 PL_diehook = SvREFCNT_inc (rv_diehook);
1193 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1194
1195 GvSV (PL_defgv) = newSV (0);
1196 GvAV (PL_defgv) = coro->args; coro->args = 0;
1197 GvSV (PL_errgv) = newSV (0);
1198 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1199 GvHV (PL_hintgv) = newHV ();
1200#if PERL_VERSION_ATLEAST (5,10,0)
1201 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1202#endif
1203 PL_rs = newSVsv (GvSV (irsgv));
1204 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1205
1206 {
1207 dSP;
1208 UNOP myop;
1209
1210 Zero (&myop, 1, UNOP);
1211 myop.op_next = Nullop;
1212 myop.op_type = OP_ENTERSUB;
1213 myop.op_flags = OPf_WANT_VOID;
1214
1215 PUSHMARK (SP);
1216 PUSHs ((SV *)coro->startcv);
1217 PUTBACK;
1218 PL_op = (OP *)&myop;
1219 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1220 }
1221
1222 /* this newly created coroutine might be run on an existing cctx which most
1223 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1224 */
1225 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1226 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1227 slf_frame.destroy = 0;
1228
1229 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1230 init_perl_op.op_next = PL_op;
1231 init_perl_op.op_type = OP_ENTERSUB;
1232 init_perl_op.op_ppaddr = pp_slf;
1233 /* no flags etc. required, as an init function won't be called */
1234
1235 PL_op = (OP *)&init_perl_op;
1236
1237 /* copy throw, in case it was set before init_perl */
1238 CORO_THROW = coro->except;
1239
1240 SWAP_SVS_ENTER (coro);
1241
1242 if (ecb_expect_false (enable_times))
1243 {
1244 coro_times_update ();
1245 coro_times_sub (coro);
1246 }
1247}
1248
1249static void
1250coro_unwind_stacks (pTHX)
1251{
1252 if (!IN_DESTRUCT)
1253 {
1254 /* restore all saved variables and stuff */
1255 LEAVE_SCOPE (0);
1256 assert (PL_tmps_floor == -1);
1257
1258 /* free all temporaries */
1259 FREETMPS;
1260 assert (PL_tmps_ix == -1);
1261
1262 /* unwind all extra stacks */
1263 POPSTACK_TO (PL_mainstack);
1264
1265 /* unwind main stack */
1266 dounwind (-1);
1267 }
1268}
1269
1270static void
1271destroy_perl (pTHX_ struct coro *coro)
1272{
1273 SV *svf [9];
1274
1275 {
1276 SV *old_current = SvRV (coro_current);
1277 struct coro *current = SvSTATE (old_current);
1278
1279 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1280
1281 save_perl (aTHX_ current);
1282
1283 /* this will cause transfer_check to croak on block*/
1284 SvRV_set (coro_current, (SV *)coro->hv);
1285
1286 load_perl (aTHX_ coro);
1287
1288 /* restore swapped sv's */
1289 SWAP_SVS_LEAVE (coro);
1290
1291 coro_unwind_stacks (aTHX);
1292
1293 coro_destruct_stacks (aTHX);
1294
1295 /* now save some sv's to be free'd later */
1296 svf [0] = GvSV (PL_defgv);
1297 svf [1] = (SV *)GvAV (PL_defgv);
1298 svf [2] = GvSV (PL_errgv);
1299 svf [3] = (SV *)PL_defoutgv;
1300 svf [4] = PL_rs;
1301 svf [5] = GvSV (irsgv);
1302 svf [6] = (SV *)GvHV (PL_hintgv);
1303 svf [7] = PL_diehook;
1304 svf [8] = PL_warnhook;
1305 assert (9 == sizeof (svf) / sizeof (*svf));
1306
1307 SvRV_set (coro_current, old_current);
1308
1309 load_perl (aTHX_ current);
1310 }
1311
1312 {
1313 unsigned int i;
1314
1315 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1316 SvREFCNT_dec (svf [i]);
1317
1318 SvREFCNT_dec (coro->saved_deffh);
1319 SvREFCNT_dec (coro->rouse_cb);
1320 SvREFCNT_dec (coro->invoke_cb);
1321 SvREFCNT_dec (coro->invoke_av);
1322 SvREFCNT_dec (coro->on_enter_xs);
1323 SvREFCNT_dec (coro->on_leave_xs);
1324 }
1325}
1326
1327ecb_inline void
1328free_coro_mortal (pTHX)
1329{
1330 if (ecb_expect_true (coro_mortal))
1331 {
1332 SvREFCNT_dec ((SV *)coro_mortal);
1333 coro_mortal = 0;
1334 }
1335}
1336
1337static int
1338runops_trace (pTHX)
1339{
1340 COP *oldcop = 0;
1341 int oldcxix = -2;
1342
1343 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1344 {
1345 PERL_ASYNC_CHECK ();
1346
1347 if (cctx_current->flags & CC_TRACE_ALL)
1348 {
1349 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1350 {
1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1352 SV **bot, **top;
1353 AV *av = newAV (); /* return values */
1354 SV **cb;
1355 dSP;
1356
1357 GV *gv = CvGV (cx->blk_sub.cv);
1358 SV *fullname = sv_2mortal (newSV (0));
1359 if (isGV (gv))
1360 gv_efullname3 (fullname, gv, 0);
1361
1362 bot = PL_stack_base + cx->blk_oldsp + 1;
1363 top = cx->blk_gimme == G_ARRAY ? SP + 1
1364 : cx->blk_gimme == G_SCALAR ? bot + 1
1365 : bot;
1366
1367 av_extend (av, top - bot);
1368 while (bot < top)
1369 av_push (av, SvREFCNT_inc_NN (*bot++));
1370
1371 PL_runops = RUNOPS_DEFAULT;
1372 ENTER;
1373 SAVETMPS;
1374 EXTEND (SP, 3);
1375 PUSHMARK (SP);
1376 PUSHs (&PL_sv_no);
1377 PUSHs (fullname);
1378 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1379 PUTBACK;
1380 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1381 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1382 SPAGAIN;
1383 FREETMPS;
1384 LEAVE;
1385 PL_runops = runops_trace;
1386 }
1387
1388 if (oldcop != PL_curcop)
1389 {
1390 oldcop = PL_curcop;
1391
1392 if (PL_curcop != &PL_compiling)
1393 {
1394 SV **cb;
1395
1396 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1397 {
1398 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1399
1400 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1401 {
1402 dSP;
1403 GV *gv = CvGV (cx->blk_sub.cv);
1404 SV *fullname = sv_2mortal (newSV (0));
1405
1406 if (isGV (gv))
1407 gv_efullname3 (fullname, gv, 0);
1408
1409 PL_runops = RUNOPS_DEFAULT;
1410 ENTER;
1411 SAVETMPS;
1412 EXTEND (SP, 3);
1413 PUSHMARK (SP);
1414 PUSHs (&PL_sv_yes);
1415 PUSHs (fullname);
1416 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1417 PUTBACK;
1418 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1419 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1420 SPAGAIN;
1421 FREETMPS;
1422 LEAVE;
1423 PL_runops = runops_trace;
1424 }
1425
1426 oldcxix = cxstack_ix;
1427 }
1428
1429 if (cctx_current->flags & CC_TRACE_LINE)
1430 {
1431 dSP;
1432
1433 PL_runops = RUNOPS_DEFAULT;
1434 ENTER;
1435 SAVETMPS;
1436 EXTEND (SP, 3);
1437 PL_runops = RUNOPS_DEFAULT;
1438 PUSHMARK (SP);
1439 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1440 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1441 PUTBACK;
1442 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1443 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1444 SPAGAIN;
1445 FREETMPS;
1446 LEAVE;
1447 PL_runops = runops_trace;
1448 }
1449 }
1450 }
1451 }
1452 }
1453
1454 TAINT_NOT;
1455 return 0;
1456}
1457
1458static struct CoroSLF cctx_ssl_frame;
1459
1460static void
1461slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1462{
1463 ta->prev = 0;
1464}
1465
1466static int
1467slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1468{
1469 *frame = cctx_ssl_frame;
1470
1471 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1472}
1473
1474/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1475static void ecb_noinline
1476cctx_prepare (pTHX)
1477{
1478 PL_top_env = &PL_start_env;
1479
1480 if (cctx_current->flags & CC_TRACE)
1481 PL_runops = runops_trace;
1482
1483 /* we already must be executing an SLF op, there is no other valid way
1484 * that can lead to creation of a new cctx */
1485 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1486 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1487
1488 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1489 cctx_ssl_frame = slf_frame;
1490
1491 slf_frame.prepare = slf_prepare_set_stacklevel;
1492 slf_frame.check = slf_check_set_stacklevel;
1493}
1494
1495/* the tail of transfer: execute stuff we can only do after a transfer */
1496ecb_inline void
1497transfer_tail (pTHX)
1498{
1499 free_coro_mortal (aTHX);
1500}
1501
1502/* try to exit the same way perl's main function would do */
1503/* we do not bother resetting the environment or other things *7
1504/* that are not, uhm, essential */
1505/* this obviously also doesn't work when perl is embedded */
1506static void ecb_noinline ecb_cold
1507perlish_exit (pTHX)
1508{
1509 int exitstatus = perl_destruct (PL_curinterp);
1510 perl_free (PL_curinterp);
1511 exit (exitstatus);
1512}
1513
1514/*
1515 * this is a _very_ stripped down perl interpreter ;)
1516 */
1517static void
1518cctx_run (void *arg)
1519{
1520#ifdef USE_ITHREADS
1521# if CORO_PTHREAD
1522 PERL_SET_CONTEXT (coro_thx);
1523# endif
1524#endif
1525 {
1526 dTHX;
1527
1528 /* normally we would need to skip the entersub here */
1529 /* not doing so will re-execute it, which is exactly what we want */
1530 /* PL_nop = PL_nop->op_next */
1531
1532 /* inject a fake subroutine call to cctx_init */
1533 cctx_prepare (aTHX);
1534
1535 /* cctx_run is the alternative tail of transfer() */
1536 transfer_tail (aTHX);
1537
1538 /* somebody or something will hit me for both perl_run and PL_restartop */
1539 PL_restartop = PL_op;
1540 perl_run (PL_curinterp);
1541 /*
1542 * Unfortunately, there is no way to get at the return values of the
1543 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1544 * runtime errors here, as this is just a random interpreter, not a thread.
1545 */
1546
1547 /*
1548 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
1549 * requires PL_scopestack_ix, so do it here if required.
1550 */
1551 if (!PL_scopestack_ix)
1552 ENTER;
1553
1554 /*
1555 * If perl-run returns we assume exit() was being called or the coro
1556 * fell off the end, which seems to be the only valid (non-bug)
1557 * reason for perl_run to return. We try to mimic whatever perl is normally
1558 * doing in that case. YMMV.
1559 */
1560 perlish_exit (aTHX);
1561 }
1562}
1563
1564static coro_cctx *
1565cctx_new (void)
1566{
1567 coro_cctx *cctx;
1568
1569 ++cctx_count;
1570 New (0, cctx, 1, coro_cctx);
1571
1572 cctx->gen = cctx_gen;
1573 cctx->flags = 0;
1574 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1575
1576 return cctx;
1577}
1578
1579/* create a new cctx only suitable as source */
1580static coro_cctx *
1581cctx_new_empty (void)
1582{
1583 coro_cctx *cctx = cctx_new ();
1584
1585 cctx->stack.sptr = 0;
1586 coro_create (&cctx->cctx, 0, 0, 0, 0);
1587
1588 return cctx;
1589}
1590
1591/* create a new cctx suitable as destination/running a perl interpreter */
1592static coro_cctx *
1593cctx_new_run (void)
1594{
1595 coro_cctx *cctx = cctx_new ();
1596
1597 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1598 {
1599 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1600 _exit (EXIT_FAILURE);
1601 }
1602
1603 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1604
1605 return cctx;
1606}
1607
1608static void
1609cctx_destroy (coro_cctx *cctx)
1610{
1611 if (!cctx)
1612 return;
1613
1614 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1615
1616 --cctx_count;
1617 coro_destroy (&cctx->cctx);
1618
1619 coro_stack_free (&cctx->stack);
1620
1621 Safefree (cctx);
1622}
1623
1624/* wether this cctx should be destructed */
1625#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1626
1627static coro_cctx *
1628cctx_get (pTHX)
1629{
1630 while (ecb_expect_true (cctx_first))
1631 {
1632 coro_cctx *cctx = cctx_first;
1633 cctx_first = cctx->next;
1634 --cctx_idle;
1635
1636 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1637 return cctx;
1638
1639 cctx_destroy (cctx);
1640 }
1641
1642 return cctx_new_run ();
1643}
1644
1645static void
1646cctx_put (coro_cctx *cctx)
1647{
1648 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1649
1650 /* free another cctx if overlimit */
1651 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1652 {
1653 coro_cctx *first = cctx_first;
1654 cctx_first = first->next;
1655 --cctx_idle;
1656
1657 cctx_destroy (first);
1658 }
1659
1660 ++cctx_idle;
1661 cctx->next = cctx_first;
1662 cctx_first = cctx;
1663}
1664
1665/** coroutine switching *****************************************************/
1666
1667static void
1668transfer_check (pTHX_ struct coro *prev, struct coro *next)
1669{
1670 /* TODO: throwing up here is considered harmful */
1671
1672 if (ecb_expect_true (prev != next))
1673 {
1674 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1675 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1676
1677 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1678 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1679
1680#if !PERL_VERSION_ATLEAST (5,10,0)
1681 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1682 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1683#endif
1684 }
1685}
1686
1687/* always use the TRANSFER macro */
1688static void ecb_noinline /* noinline so we have a fixed stackframe */
1689transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1690{
1691 dSTACKLEVEL;
1692
1693 /* sometimes transfer is only called to set idle_sp */
1694 if (ecb_expect_false (!prev))
1695 {
1696 cctx_current->idle_sp = STACKLEVEL;
1697 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1698 }
1699 else if (ecb_expect_true (prev != next))
1700 {
1701 coro_cctx *cctx_prev;
1702
1703 if (ecb_expect_false (prev->flags & CF_NEW))
1704 {
1705 /* create a new empty/source context */
1706 prev->flags &= ~CF_NEW;
1707 prev->flags |= CF_RUNNING;
1708 }
1709
1710 prev->flags &= ~CF_RUNNING;
1711 next->flags |= CF_RUNNING;
1712
1713 /* first get rid of the old state */
1714 save_perl (aTHX_ prev);
1715
1716 if (ecb_expect_false (next->flags & CF_NEW))
1717 {
1718 /* need to start coroutine */
1719 next->flags &= ~CF_NEW;
1720 /* setup coroutine call */
1721 init_perl (aTHX_ next);
1722 }
1723 else
1724 load_perl (aTHX_ next);
1725
1726 /* possibly untie and reuse the cctx */
1727 if (ecb_expect_true (
1728 cctx_current->idle_sp == STACKLEVEL
1729 && !(cctx_current->flags & CC_TRACE)
1730 && !force_cctx
1731 ))
1732 {
1733 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1734 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1735
1736 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1737 /* without this the next cctx_get might destroy the running cctx while still in use */
1738 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1739 if (ecb_expect_true (!next->cctx))
1740 next->cctx = cctx_get (aTHX);
1741
1742 cctx_put (cctx_current);
1743 }
1744 else
1745 prev->cctx = cctx_current;
1746
1747 ++next->usecount;
1748
1749 cctx_prev = cctx_current;
1750 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1751
1752 next->cctx = 0;
1753
1754 if (ecb_expect_false (cctx_prev != cctx_current))
1755 {
1756 cctx_prev->top_env = PL_top_env;
1757 PL_top_env = cctx_current->top_env;
1758 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1759 }
1760
1761 transfer_tail (aTHX);
1762 }
1763}
1764
1765#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1766#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1767
1768/** high level stuff ********************************************************/
1769
1770/* this function is actually Coro, not Coro::State, but we call it from here */
1771/* because it is convenient - but it hasn't been declared yet for that reason */
1772static void
1773coro_call_on_destroy (pTHX_ struct coro *coro);
1774
1775static void
1776coro_state_destroy (pTHX_ struct coro *coro)
1777{
1778 if (coro->flags & CF_ZOMBIE)
1779 return;
1780
1781 slf_destroy (aTHX_ coro);
1782
1783 coro->flags |= CF_ZOMBIE;
1784
1785 if (coro->flags & CF_READY)
1786 {
1787 /* reduce nready, as destroying a ready coro effectively unreadies it */
1788 /* alternative: look through all ready queues and remove the coro */
1789 --coro_nready;
1790 }
1791 else
1792 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1793
1794 if (coro->next) coro->next->prev = coro->prev;
1795 if (coro->prev) coro->prev->next = coro->next;
1796 if (coro == coro_first) coro_first = coro->next;
1797
1798 if (coro->mainstack
1799 && coro->mainstack != main_mainstack
1800 && coro->slot
1801 && !PL_dirty)
1802 destroy_perl (aTHX_ coro);
1803
1804 cctx_destroy (coro->cctx);
1805 SvREFCNT_dec (coro->startcv);
1806 SvREFCNT_dec (coro->args);
1807 SvREFCNT_dec (coro->swap_sv);
1808 SvREFCNT_dec (CORO_THROW);
1809
1810 coro_call_on_destroy (aTHX_ coro);
1811
1812 /* more destruction mayhem in coro_state_free */
1813}
1814
1815static int
1816coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1817{
1818 struct coro *coro = (struct coro *)mg->mg_ptr;
1819 mg->mg_ptr = 0;
1820
1821 coro_state_destroy (aTHX_ coro);
1822 SvREFCNT_dec (coro->on_destroy);
1823 SvREFCNT_dec (coro->status);
1824
1825 Safefree (coro);
1826
1827 return 0;
1828}
1829
1830static int ecb_cold
1831coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1832{
1833 /* called when perl clones the current process the slow way (windows process emulation) */
1834 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1835 mg->mg_ptr = 0;
1836 mg->mg_virtual = 0;
1837
1838 return 0;
1839}
1840
1841static MGVTBL coro_state_vtbl = {
1842 0, 0, 0, 0,
1843 coro_state_free,
1844 0,
1845#ifdef MGf_DUP
1846 coro_state_dup,
1847#else
1848# define MGf_DUP 0
1849#endif
1850};
1851
1852static void
1853prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1854{
1855 ta->prev = SvSTATE (prev_sv);
1856 ta->next = SvSTATE (next_sv);
1857 TRANSFER_CHECK (*ta);
1858}
1859
1860static void
1861api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1862{
1863 struct coro_transfer_args ta;
1864
1865 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1866 TRANSFER (ta, 1);
1867}
1868
1869/** Coro ********************************************************************/
1870
1871ecb_inline void
1872coro_enq (pTHX_ struct coro *coro)
1873{
1874 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1875
1876 SvREFCNT_inc_NN (coro->hv);
1877
1878 coro->next_ready = 0;
1879 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1880 ready [1] = coro;
1881}
1882
1883ecb_inline struct coro *
1884coro_deq (pTHX)
1885{
1886 int prio;
1887
1888 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1889 {
1890 struct coro **ready = coro_ready [prio];
1891
1892 if (ready [0])
1893 {
1894 struct coro *coro = ready [0];
1895 ready [0] = coro->next_ready;
1896 return coro;
1897 }
1898 }
1899
1900 return 0;
1901}
1902
1903static void
1904invoke_sv_ready_hook_helper (void)
1905{
534 dTHX; 1906 dTHX;
535 dSP; 1907 dSP;
536 UNOP myop;
537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538 1908
539 coro_init_stacks (); 1909 ENTER;
540 /*PL_curcop = 0;*/ 1910 SAVETMPS;
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */
542 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0;
544 1911
545 SPAGAIN;
546
547 Zero (&myop, 1, UNOP);
548 myop.op_next = Nullop;
549 myop.op_flags = OPf_WANT_VOID;
550
551 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP); 1912 PUSHMARK (SP);
554 XPUSHs (sub_init);
555 PUTBACK; 1913 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1914 call_sv (coro_readyhook, G_VOID | G_DISCARD);
557 SPAGAIN;
558 1915
559 ENTER; /* necessary e.g. for dounwind */ 1916 FREETMPS;
1917 LEAVE;
560} 1918}
561 1919
562static void 1920static int
563free_coro_mortal () 1921api_ready (pTHX_ SV *coro_sv)
564{ 1922{
565 if (coro_mortal) 1923 struct coro *coro = SvSTATE (coro_sv);
566 {
567 SvREFCNT_dec (coro_mortal);
568 coro_mortal = 0;
569 }
570}
571 1924
572static void 1925 if (coro->flags & CF_READY)
573prepare_cctx (coro_stack *cctx)
574{
575 dSP;
576 UNOP myop;
577
578 Zero (&myop, 1, UNOP);
579 myop.op_next = PL_op;
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
582 PUSHMARK(SP);
583 EXTEND (SP, 2);
584 PUSHs (newSViv (PTR2IV (cctx)));
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
586 PUTBACK;
587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
588 SPAGAIN;
589}
590
591static void
592coro_run (void *arg)
593{
594 /*
595 * this is a _very_ stripped down perl interpreter ;)
596 */
597 UNLOCK;
598
599 PL_top_env = &PL_start_env;
600 prepare_cctx ((coro_stack *)arg);
601
602 /* somebody will hit me for both perl_run and PL_restartop */
603 perl_run (PERL_GET_CONTEXT);
604
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606 abort ();
607}
608
609static coro_stack *
610stack_new ()
611{
612 coro_stack *stack;
613
614 New (0, stack, 1, coro_stack);
615
616#if HAVE_MMAP
617
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619 /* mmap suppsedly does allocate-on-write for us */
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621
622 if (stack->sptr == (void *)-1)
623 {
624 perror ("FATAL: unable to mmap stack for coroutine");
625 _exit (EXIT_FAILURE);
626 }
627
628# if STACKGUARD
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630# endif
631
632#else
633
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 {
639 perror (stderr, "FATAL: unable to malloc stack for coroutine");
640 _exit (EXIT_FAILURE);
641 }
642
643#endif
644
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
646
647 return stack;
648}
649
650static void
651stack_free (coro_stack *stack)
652{
653 if (!stack)
654 return; 1926 return 0;
655 1927
656#if HAVE_MMAP 1928 coro->flags |= CF_READY;
657 munmap (stack->sptr, stack->ssize);
658#else
659 Safefree (stack->sptr);
660#endif
661 1929
662 Safefree (stack); 1930 coro_enq (aTHX_ coro);
663}
664 1931
665static coro_stack *stack_first; 1932 if (!coro_nready++)
1933 if (coroapi.readyhook)
1934 coroapi.readyhook ();
666 1935
667static coro_stack * 1936 return 1;
668stack_get () 1937}
669{
670 coro_stack *stack;
671 1938
672 if (stack_first) 1939static int
673 { 1940api_is_ready (pTHX_ SV *coro_sv)
674 stack = stack_first; 1941{
675 stack_first = stack->next; 1942 return !!(SvSTATE (coro_sv)->flags & CF_READY);
676 } 1943}
677 else 1944
1945/* expects to own a reference to next->hv */
1946ecb_inline void
1947prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1948{
1949 SV *prev_sv = SvRV (coro_current);
1950
1951 ta->prev = SvSTATE_hv (prev_sv);
1952 ta->next = next;
1953
1954 TRANSFER_CHECK (*ta);
1955
1956 SvRV_set (coro_current, (SV *)next->hv);
1957
1958 free_coro_mortal (aTHX);
1959 coro_mortal = prev_sv;
1960}
1961
1962static void
1963prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1964{
1965 for (;;)
678 { 1966 {
679 stack = stack_new (); 1967 struct coro *next = coro_deq (aTHX);
680 PL_op = PL_op->op_next;
681 }
682 1968
683 return stack; 1969 if (ecb_expect_true (next))
684}
685
686static void
687stack_put (coro_stack *stack)
688{
689 stack->next = stack_first;
690 stack_first = stack;
691}
692
693/* never call directly, always through the coro_state_transfer global variable */
694static void
695transfer_impl (struct coro *prev, struct coro *next, int flags)
696{
697 dSTACKLEVEL;
698
699 /* sometimes transfer is only called to set idle_sp */
700 if (flags == TRANSFER_SET_STACKLEVEL)
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next)
703 {
704 coro_stack *prev__stack;
705
706 LOCK;
707
708 if (next->mainstack)
709 { 1970 {
710 /* coroutine already started */ 1971 /* cannot transfer to destroyed coros, skip and look for next */
711 SAVE (prev, flags); 1972 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
712 LOAD (next); 1973 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1974 else
1975 {
1976 next->flags &= ~CF_READY;
1977 --coro_nready;
1978
1979 prepare_schedule_to (aTHX_ ta, next);
1980 break;
1981 }
713 } 1982 }
714 else 1983 else
715 { 1984 {
716 /* need to start coroutine */ 1985 /* nothing to schedule: call the idle handler */
717 /* first get rid of the old state */ 1986 if (SvROK (sv_idle)
718 SAVE (prev, -1); 1987 && SvOBJECT (SvRV (sv_idle)))
719 /* setup coroutine call */ 1988 {
720 setup_coro (next); 1989 if (SvRV (sv_idle) == SvRV (coro_current))
721 /* need a stack */ 1990 {
722 next->stack = 0; 1991 require_pv ("Carp");
1992
1993 {
1994 dSP;
1995
1996 ENTER;
1997 SAVETMPS;
1998
1999 PUSHMARK (SP);
2000 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2001 PUTBACK;
2002 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2003
2004 FREETMPS;
2005 LEAVE;
2006 }
2007 }
2008
2009 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2010 api_ready (aTHX_ SvRV (sv_idle));
2011 --coro_nready;
2012 }
2013 else
2014 {
2015 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2016 dSP;
2017
2018 ENTER;
2019 SAVETMPS;
2020
2021 PUSHMARK (SP);
2022 PUTBACK;
2023 call_sv (sv_idle, G_VOID | G_DISCARD);
2024
2025 FREETMPS;
2026 LEAVE;
2027 }
723 } 2028 }
2029 }
2030}
724 2031
725 if (!prev->stack) 2032ecb_inline void
726 /* create a new empty context */ 2033prepare_cede (pTHX_ struct coro_transfer_args *ta)
727 Newz (0, prev->stack, 1, coro_stack); 2034{
2035 api_ready (aTHX_ coro_current);
2036 prepare_schedule (aTHX_ ta);
2037}
728 2038
729 prev__stack = prev->stack; 2039ecb_inline void
2040prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2041{
2042 SV *prev = SvRV (coro_current);
730 2043
731 /* possibly "free" the stack */ 2044 if (coro_nready)
732 if (prev__stack->idle_sp == STACKLEVEL) 2045 {
2046 prepare_schedule (aTHX_ ta);
2047 api_ready (aTHX_ prev);
2048 }
2049 else
2050 prepare_nop (aTHX_ ta);
2051}
2052
2053static void
2054api_schedule (pTHX)
2055{
2056 struct coro_transfer_args ta;
2057
2058 prepare_schedule (aTHX_ &ta);
2059 TRANSFER (ta, 1);
2060}
2061
2062static void
2063api_schedule_to (pTHX_ SV *coro_sv)
2064{
2065 struct coro_transfer_args ta;
2066 struct coro *next = SvSTATE (coro_sv);
2067
2068 SvREFCNT_inc_NN (coro_sv);
2069 prepare_schedule_to (aTHX_ &ta, next);
2070}
2071
2072static int
2073api_cede (pTHX)
2074{
2075 struct coro_transfer_args ta;
2076
2077 prepare_cede (aTHX_ &ta);
2078
2079 if (ecb_expect_true (ta.prev != ta.next))
2080 {
2081 TRANSFER (ta, 1);
2082 return 1;
2083 }
2084 else
2085 return 0;
2086}
2087
2088static int
2089api_cede_notself (pTHX)
2090{
2091 if (coro_nready)
2092 {
2093 struct coro_transfer_args ta;
2094
2095 prepare_cede_notself (aTHX_ &ta);
2096 TRANSFER (ta, 1);
2097 return 1;
2098 }
2099 else
2100 return 0;
2101}
2102
2103static void
2104api_trace (pTHX_ SV *coro_sv, int flags)
2105{
2106 struct coro *coro = SvSTATE (coro_sv);
2107
2108 if (coro->flags & CF_RUNNING)
2109 croak ("cannot enable tracing on a running coroutine, caught");
2110
2111 if (flags & CC_TRACE)
2112 {
2113 if (!coro->cctx)
2114 coro->cctx = cctx_new_run ();
2115 else if (!(coro->cctx->flags & CC_TRACE))
2116 croak ("cannot enable tracing on coroutine with custom stack, caught");
2117
2118 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2119 }
2120 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2121 {
2122 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2123
2124 if (coro->flags & CF_RUNNING)
2125 PL_runops = RUNOPS_DEFAULT;
2126 else
2127 coro->slot->runops = RUNOPS_DEFAULT;
2128 }
2129}
2130
2131static void
2132coro_push_av (pTHX_ AV *av, I32 gimme_v)
2133{
2134 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2135 {
2136 dSP;
2137
2138 if (gimme_v == G_SCALAR)
2139 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2140 else
733 { 2141 {
734 stack_put (prev__stack); 2142 int i;
735 prev->stack = 0; 2143 EXTEND (SP, AvFILLp (av) + 1);
2144
2145 for (i = 0; i <= AvFILLp (av); ++i)
2146 PUSHs (AvARRAY (av)[i]);
736 } 2147 }
737 2148
738 if (!next->stack) 2149 PUTBACK;
739 next->stack = stack_get (); 2150 }
2151}
740 2152
741 if (prev__stack != next->stack) 2153static void
2154coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2155{
2156 if (!coro->on_destroy)
2157 coro->on_destroy = newAV ();
2158
2159 av_push (coro->on_destroy, cb);
2160}
2161
2162static void
2163slf_destroy_join (pTHX_ struct CoroSLF *frame)
2164{
2165 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2166}
2167
2168static int
2169slf_check_join (pTHX_ struct CoroSLF *frame)
2170{
2171 struct coro *coro = (struct coro *)frame->data;
2172
2173 if (!coro->status)
2174 return 1;
2175
2176 frame->destroy = 0;
2177
2178 coro_push_av (aTHX_ coro->status, GIMME_V);
2179
2180 SvREFCNT_dec ((SV *)coro->hv);
2181
2182 return 0;
2183}
2184
2185static void
2186slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2187{
2188 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2189
2190 if (items > 1)
2191 croak ("join called with too many arguments");
2192
2193 if (coro->status)
2194 frame->prepare = prepare_nop;
2195 else
2196 {
2197 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2198 frame->prepare = prepare_schedule;
2199 }
2200
2201 frame->check = slf_check_join;
2202 frame->destroy = slf_destroy_join;
2203 frame->data = (void *)coro;
2204 SvREFCNT_inc (coro->hv);
2205}
2206
2207static void
2208coro_call_on_destroy (pTHX_ struct coro *coro)
2209{
2210 AV *od = coro->on_destroy;
2211
2212 if (!od)
2213 return;
2214
2215 coro->on_destroy = 0;
2216 sv_2mortal ((SV *)od);
2217
2218 while (AvFILLp (od) >= 0)
2219 {
2220 SV *cb = sv_2mortal (av_pop (od));
2221
2222 /* coro hv's (and only hv's at the moment) are supported as well */
2223 if (SvSTATEhv_p (aTHX_ cb))
2224 api_ready (aTHX_ cb);
2225 else
742 { 2226 {
743 prev__stack->top_env = PL_top_env; 2227 dSP; /* don't disturb outer sp */
744 PL_top_env = next->stack->top_env; 2228 PUSHMARK (SP);
745 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 2229
2230 if (coro->status)
2231 {
2232 PUTBACK;
2233 coro_push_av (aTHX_ coro->status, G_ARRAY);
2234 SPAGAIN;
2235 }
2236
2237 PUTBACK;
2238 call_sv (cb, G_VOID | G_DISCARD);
746 } 2239 }
747
748 free_coro_mortal ();
749
750 UNLOCK;
751 }
752}
753
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772
773 if (coro->mainstack && coro->mainstack != main_mainstack)
774 { 2240 }
775 struct coro temp; 2241}
776 2242
777 SAVE ((&temp), TRANSFER_SAVE_ALL); 2243static void
778 LOAD (coro); 2244coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
779 2245{
780 destroy_stacks (); 2246 AV *av;
781 2247
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 2248 if (coro->status)
783
784 coro->mainstack = 0;
785 } 2249 {
2250 av = coro->status;
2251 av_clear (av);
2252 }
2253 else
2254 av = coro->status = newAV ();
786 2255
787 stack_free (coro->stack); 2256 /* items are actually not so common, so optimise for this case */
788 SvREFCNT_dec (coro->args); 2257 if (items)
789 Safefree (coro); 2258 {
2259 int i;
2260
2261 av_extend (av, items - 1);
2262
2263 for (i = 0; i < items; ++i)
2264 av_push (av, SvREFCNT_inc_NN (arg [i]));
2265 }
2266}
2267
2268static void
2269slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2270{
2271 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2272 api_ready (aTHX_ sv_manager);
2273
2274 frame->prepare = prepare_schedule;
2275 frame->check = slf_check_repeat;
2276
2277 /* as a minor optimisation, we could unwind all stacks here */
2278 /* but that puts extra pressure on pp_slf, and is not worth much */
2279 /*coro_unwind_stacks (aTHX);*/
2280}
2281
2282static void
2283slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2284{
2285 HV *coro_hv = (HV *)SvRV (coro_current);
2286
2287 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2288 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2289}
2290
2291static void
2292slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2293{
2294 HV *coro_hv;
2295 struct coro *coro;
2296
2297 if (items <= 0)
2298 croak ("Coro::cancel called without coro object,");
2299
2300 coro = SvSTATE (arg [0]);
2301 coro_hv = coro->hv;
2302
2303 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2304
2305 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2306 {
2307 /* coro currently busy cancelling something, so just notify it */
2308 coro->slf_frame.data = (void *)coro;
2309
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
2313 else if (coro_hv == (HV *)SvRV (coro_current))
2314 {
2315 /* cancelling the current coro is allowed, and equals terminate */
2316 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2317 }
2318 else
2319 {
2320 struct coro *self = SvSTATE_current;
2321
2322 if (!self)
2323 croak ("Coro::cancel called outside of thread content,");
2324
2325 /* otherwise we cancel directly, purely for speed reasons
2326 * unfortunately, this requires some magic trickery, as
2327 * somebody else could cancel us, so we have to fight the cancellation.
2328 * this is ugly, and hopefully fully worth the extra speed.
2329 * besides, I can't get the slow-but-safe version working...
2330 */
2331 slf_frame.data = 0;
2332 self->flags |= CF_NOCANCEL;
2333 coro_state_destroy (aTHX_ coro);
2334 self->flags &= ~CF_NOCANCEL;
2335
2336 if (slf_frame.data)
2337 {
2338 /* while we were busy we have been cancelled, so terminate */
2339 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2340 }
2341 else
2342 {
2343 frame->prepare = prepare_nop;
2344 frame->check = slf_check_nop;
2345 }
2346 }
790} 2347}
791 2348
792static int 2349static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 2350slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
794{ 2351{
795 struct coro *coro = (struct coro *)mg->mg_ptr; 2352 frame->prepare = 0;
796 mg->mg_ptr = 0; 2353 coro_unwind_stacks (aTHX);
797 2354
798 coro_state_destroy (coro); 2355 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
799 2356
800 return 0; 2357 return 1;
801} 2358}
802 2359
803static int 2360static int
804coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 2361safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
805{ 2362{
806 struct coro *coro = (struct coro *)mg->mg_ptr; 2363 if (coro->cctx)
2364 croak ("coro inside C callback, unable to cancel at this time, caught");
807 2365
808 ++coro->refcnt; 2366 if (coro->flags & CF_NEW)
2367 {
2368 coro_set_status (aTHX_ coro, arg, items);
2369 coro_state_destroy (aTHX_ coro);
2370 }
2371 else
2372 {
2373 if (!coro->slf_frame.prepare)
2374 croak ("coro outside an SLF function, unable to cancel at this time, caught");
809 2375
2376 slf_destroy (aTHX_ coro);
2377
2378 coro_set_status (aTHX_ coro, arg, items);
2379 coro->slf_frame.prepare = prepare_nop;
2380 coro->slf_frame.check = slf_check_safe_cancel;
2381
2382 api_ready (aTHX_ (SV *)coro->hv);
2383 }
2384
810 return 0; 2385 return 1;
811} 2386}
812 2387
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
814
815static struct coro *
816SvSTATE (SV *coro)
817{
818 HV *stash;
819 MAGIC *mg;
820
821 if (SvROK (coro))
822 coro = SvRV (coro);
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836
837static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
839{
840 ta->prev = SvSTATE (prev);
841 ta->next = SvSTATE (next);
842 ta->flags = flags;
843}
844
845static void
846api_transfer (SV *prev, SV *next, int flags)
847{
848 dTHX;
849 struct transfer_args ta;
850
851 prepare_transfer (&ta, prev, next, flags);
852 TRANSFER (ta);
853}
854
855/** Coro ********************************************************************/ 2388/*****************************************************************************/
2389/* async pool handler */
856 2390
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void 2391static int
870coro_enq (SV *sv) 2392slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2393{
872 int prio; 2394 HV *hv = (HV *)SvRV (coro_current);
2395 struct coro *coro = (struct coro *)frame->data;
873 2396
874 if (SvTYPE (sv) != SVt_PVHV) 2397 if (!coro->invoke_cb)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2398 return 1; /* loop till we have invoke */
876 2399 else
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893 if (AvFILLp (coro_ready [prio]) >= 0)
894 { 2400 {
895 coro_nready--; 2401 hv_store (hv, "desc", sizeof ("desc") - 1,
896 return av_shift (coro_ready [prio]); 2402 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
897 }
898 2403
899 return 0; 2404 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
900}
901
902static void
903api_ready (SV *coro)
904{
905 dTHX;
906
907 if (SvROK (coro))
908 coro = SvRV (coro);
909
910 LOCK;
911 coro_enq (SvREFCNT_inc (coro));
912 UNLOCK;
913}
914
915static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930 2405
931 { 2406 {
932 dSP; 2407 dSP;
933 2408 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 2409 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 2410 }
2411
2412 SvREFCNT_dec (GvAV (PL_defgv));
2413 GvAV (PL_defgv) = coro->invoke_av;
2414 coro->invoke_av = 0;
2415
2416 return 0;
2417 }
2418}
2419
2420static void
2421slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2422{
2423 HV *hv = (HV *)SvRV (coro_current);
2424 struct coro *coro = SvSTATE_hv ((SV *)hv);
2425
2426 if (ecb_expect_true (coro->saved_deffh))
944 } 2427 {
2428 /* subsequent iteration */
2429 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2430 coro->saved_deffh = 0;
945 2431
946 prev = SvRV (current); 2432 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 2433 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2434 {
2435 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2436 return;
2437 }
2438 else
2439 {
2440 av_clear (GvAV (PL_defgv));
2441 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
948 2442
949 /* free this only after the transfer */ 2443 if (ecb_expect_false (coro->swap_sv))
950 LOCK; 2444 {
951 free_coro_mortal (); 2445 swap_svs_leave (coro);
952 UNLOCK; 2446 SvREFCNT_dec_NN (coro->swap_sv);
953 coro_mortal = prev; 2447 coro->swap_sv = 0;
2448 }
954 2449
955 ta->prev = SvSTATE (prev); 2450 coro->prio = 0;
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959 2451
2452 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2453 api_trace (aTHX_ coro_current, 0);
2454
2455 frame->prepare = prepare_schedule;
2456 av_push (av_async_pool, SvREFCNT_inc (hv));
2457 }
2458 }
2459 else
2460 {
2461 /* first iteration, simply fall through */
2462 frame->prepare = prepare_nop;
2463 }
2464
2465 frame->check = slf_check_pool_handler;
2466 frame->data = (void *)coro;
2467}
2468
2469/*****************************************************************************/
2470/* rouse callback */
2471
2472#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2473
2474static void
2475coro_rouse_callback (pTHX_ CV *cv)
2476{
2477 dXSARGS;
2478 SV *data = (SV *)S_GENSUB_ARG;
2479
2480 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2481 {
2482 /* first call, set args */
2483 SV *coro = SvRV (data);
2484 AV *av = newAV ();
2485
2486 SvRV_set (data, (SV *)av);
2487
2488 /* better take a full copy of the arguments */
2489 while (items--)
2490 av_store (av, items, newSVsv (ST (items)));
2491
2492 api_ready (aTHX_ coro);
2493 SvREFCNT_dec (coro);
2494 }
2495
2496 XSRETURN_EMPTY;
2497}
2498
960static void 2499static int
2500slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2501{
2502 SV *data = (SV *)frame->data;
2503
2504 if (CORO_THROW)
2505 return 0;
2506
2507 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2508 return 1;
2509
2510 /* now push all results on the stack */
2511 {
2512 dSP;
2513 AV *av = (AV *)SvRV (data);
2514 int i;
2515
2516 EXTEND (SP, AvFILLp (av) + 1);
2517 for (i = 0; i <= AvFILLp (av); ++i)
2518 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2519
2520 /* we have stolen the elements, so set length to zero and free */
2521 AvFILLp (av) = -1;
2522 av_undef (av);
2523
2524 PUTBACK;
2525 }
2526
2527 return 0;
2528}
2529
2530static void
2531slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2532{
2533 SV *cb;
2534
2535 if (items)
2536 cb = arg [0];
2537 else
2538 {
2539 struct coro *coro = SvSTATE_current;
2540
2541 if (!coro->rouse_cb)
2542 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2543
2544 cb = sv_2mortal (coro->rouse_cb);
2545 coro->rouse_cb = 0;
2546 }
2547
2548 if (!SvROK (cb)
2549 || SvTYPE (SvRV (cb)) != SVt_PVCV
2550 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2551 croak ("Coro::rouse_wait called with illegal callback argument,");
2552
2553 {
2554 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2555 SV *data = (SV *)S_GENSUB_ARG;
2556
2557 frame->data = (void *)data;
2558 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2559 frame->check = slf_check_rouse_wait;
2560 }
2561}
2562
2563static SV *
2564coro_new_rouse_cb (pTHX)
2565{
2566 HV *hv = (HV *)SvRV (coro_current);
2567 struct coro *coro = SvSTATE_hv (hv);
2568 SV *data = newRV_inc ((SV *)hv);
2569 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2570
2571 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2572 SvREFCNT_dec (data); /* magicext increases the refcount */
2573
2574 SvREFCNT_dec (coro->rouse_cb);
2575 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2576
2577 return cb;
2578}
2579
2580/*****************************************************************************/
2581/* schedule-like-function opcode (SLF) */
2582
2583static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2584static const CV *slf_cv;
2585static SV **slf_argv;
2586static int slf_argc, slf_arga; /* count, allocated */
2587static I32 slf_ax; /* top of stack, for restore */
2588
2589/* this restores the stack in the case we patched the entersub, to */
2590/* recreate the stack frame as perl will on following calls */
2591/* since entersub cleared the stack */
2592static OP *
2593pp_restore (pTHX)
2594{
2595 int i;
2596 SV **SP = PL_stack_base + slf_ax;
2597
2598 PUSHMARK (SP);
2599
2600 EXTEND (SP, slf_argc + 1);
2601
2602 for (i = 0; i < slf_argc; ++i)
2603 PUSHs (sv_2mortal (slf_argv [i]));
2604
2605 PUSHs ((SV *)CvGV (slf_cv));
2606
2607 RETURNOP (slf_restore.op_first);
2608}
2609
2610static void
2611slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2612{
2613 SV **arg = (SV **)slf_frame.data;
2614
2615 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2616}
2617
2618static void
2619slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2620{
2621 if (items != 2)
2622 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2623
2624 frame->prepare = slf_prepare_transfer;
2625 frame->check = slf_check_nop;
2626 frame->data = (void *)arg; /* let's hope it will stay valid */
2627}
2628
2629static void
2630slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2631{
2632 frame->prepare = prepare_schedule;
2633 frame->check = slf_check_nop;
2634}
2635
2636static void
961prepare_cede (struct transfer_args *ta) 2637slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2638{
963 LOCK; 2639 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2640
2641 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2642 prepare_schedule_to (aTHX_ ta, next);
968} 2643}
969 2644
970static void 2645static void
971api_schedule (void) 2646slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2647{
973 dTHX; 2648 if (!items)
2649 croak ("Coro::schedule_to expects a coroutine argument, caught");
2650
2651 frame->data = (void *)SvSTATE (arg [0]);
2652 frame->prepare = slf_prepare_schedule_to;
2653 frame->check = slf_check_nop;
2654}
2655
2656static void
2657slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2658{
2659 api_ready (aTHX_ SvRV (coro_current));
2660
2661 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2662}
2663
2664static void
2665slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 frame->prepare = prepare_cede;
2668 frame->check = slf_check_nop;
2669}
2670
2671static void
2672slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2673{
2674 frame->prepare = prepare_cede_notself;
2675 frame->check = slf_check_nop;
2676}
2677
2678/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2679static void
2680slf_destroy (pTHX_ struct coro *coro)
2681{
2682 struct CoroSLF frame = coro->slf_frame;
2683
2684 /*
2685 * The on_destroy below most likely is from an SLF call.
2686 * Since by definition the SLF call will not finish when we destroy
2687 * the coro, we will have to force-finish it here, otherwise
2688 * cleanup functions cannot call SLF functions.
2689 */
2690 coro->slf_frame.prepare = 0;
2691
2692 /* this callback is reserved for slf functions needing to do cleanup */
2693 if (frame.destroy && frame.prepare && !PL_dirty)
2694 frame.destroy (aTHX_ &frame);
2695}
2696
2697/*
2698 * these not obviously related functions are all rolled into one
2699 * function to increase chances that they all will call transfer with the same
2700 * stack offset
2701 * SLF stands for "schedule-like-function".
2702 */
2703static OP *
2704pp_slf (pTHX)
2705{
2706 I32 checkmark; /* mark SP to see how many elements check has pushed */
2707
2708 /* set up the slf frame, unless it has already been set-up */
2709 /* the latter happens when a new coro has been started */
2710 /* or when a new cctx was attached to an existing coroutine */
2711 if (ecb_expect_true (!slf_frame.prepare))
2712 {
2713 /* first iteration */
2714 dSP;
2715 SV **arg = PL_stack_base + TOPMARK + 1;
2716 int items = SP - arg; /* args without function object */
2717 SV *gv = *sp;
2718
2719 /* do a quick consistency check on the "function" object, and if it isn't */
2720 /* for us, divert to the real entersub */
2721 if (SvTYPE (gv) != SVt_PVGV
2722 || !GvCV (gv)
2723 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2724 return PL_ppaddr[OP_ENTERSUB](aTHX);
2725
2726 if (!(PL_op->op_flags & OPf_STACKED))
2727 {
2728 /* ampersand-form of call, use @_ instead of stack */
2729 AV *av = GvAV (PL_defgv);
2730 arg = AvARRAY (av);
2731 items = AvFILLp (av) + 1;
2732 }
2733
2734 /* now call the init function, which needs to set up slf_frame */
2735 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2736 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2737
2738 /* pop args */
2739 SP = PL_stack_base + POPMARK;
2740
2741 PUTBACK;
2742 }
2743
2744 /* now that we have a slf_frame, interpret it! */
2745 /* we use a callback system not to make the code needlessly */
2746 /* complicated, but so we can run multiple perl coros from one cctx */
2747
2748 do
2749 {
974 struct transfer_args ta; 2750 struct coro_transfer_args ta;
975 2751
976 prepare_schedule (&ta); 2752 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2753 TRANSFER (ta, 0);
978}
979 2754
2755 checkmark = PL_stack_sp - PL_stack_base;
2756 }
2757 while (slf_frame.check (aTHX_ &slf_frame));
2758
2759 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2760
2761 /* exception handling */
2762 if (ecb_expect_false (CORO_THROW))
2763 {
2764 SV *exception = sv_2mortal (CORO_THROW);
2765
2766 CORO_THROW = 0;
2767 sv_setsv (ERRSV, exception);
2768 croak (0);
2769 }
2770
2771 /* return value handling - mostly like entersub */
2772 /* make sure we put something on the stack in scalar context */
2773 if (GIMME_V == G_SCALAR
2774 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2775 {
2776 dSP;
2777 SV **bot = PL_stack_base + checkmark;
2778
2779 if (sp == bot) /* too few, push undef */
2780 bot [1] = &PL_sv_undef;
2781 else /* too many, take last one */
2782 bot [1] = *sp;
2783
2784 SP = bot + 1;
2785
2786 PUTBACK;
2787 }
2788
2789 return NORMAL;
2790}
2791
2792static void
2793api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2794{
2795 int i;
2796 SV **arg = PL_stack_base + ax;
2797 int items = PL_stack_sp - arg + 1;
2798
2799 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2800
2801 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2802 && PL_op->op_ppaddr != pp_slf)
2803 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2804
2805 CvFLAGS (cv) |= CVf_SLF;
2806 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2807 slf_cv = cv;
2808
2809 /* we patch the op, and then re-run the whole call */
2810 /* we have to put the same argument on the stack for this to work */
2811 /* and this will be done by pp_restore */
2812 slf_restore.op_next = (OP *)&slf_restore;
2813 slf_restore.op_type = OP_CUSTOM;
2814 slf_restore.op_ppaddr = pp_restore;
2815 slf_restore.op_first = PL_op;
2816
2817 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2818
2819 if (PL_op->op_flags & OPf_STACKED)
2820 {
2821 if (items > slf_arga)
2822 {
2823 slf_arga = items;
2824 Safefree (slf_argv);
2825 New (0, slf_argv, slf_arga, SV *);
2826 }
2827
2828 slf_argc = items;
2829
2830 for (i = 0; i < items; ++i)
2831 slf_argv [i] = SvREFCNT_inc (arg [i]);
2832 }
2833 else
2834 slf_argc = 0;
2835
2836 PL_op->op_ppaddr = pp_slf;
2837 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2838
2839 PL_op = (OP *)&slf_restore;
2840}
2841
2842/*****************************************************************************/
2843/* dynamic wind */
2844
2845static void
2846on_enterleave_call (pTHX_ SV *cb)
2847{
2848 dSP;
2849
2850 PUSHSTACK;
2851
2852 PUSHMARK (SP);
2853 PUTBACK;
2854 call_sv (cb, G_VOID | G_DISCARD);
2855 SPAGAIN;
2856
2857 POPSTACK;
2858}
2859
2860static SV *
2861coro_avp_pop_and_free (pTHX_ AV **avp)
2862{
2863 AV *av = *avp;
2864 SV *res = av_pop (av);
2865
2866 if (AvFILLp (av) < 0)
2867 {
2868 *avp = 0;
2869 SvREFCNT_dec (av);
2870 }
2871
2872 return res;
2873}
2874
2875static void
2876coro_pop_on_enter (pTHX_ void *coro)
2877{
2878 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2879 SvREFCNT_dec (cb);
2880}
2881
2882static void
2883coro_pop_on_leave (pTHX_ void *coro)
2884{
2885 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2886 on_enterleave_call (aTHX_ sv_2mortal (cb));
2887}
2888
2889static void
2890enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2891{
2892 if (!hook)
2893 return;
2894
2895 if (!*avp)
2896 {
2897 *avp = newAV ();
2898 AvREAL_off (*avp);
2899 }
2900
2901 av_push (*avp, (SV *)hook);
2902 av_push (*avp, (SV *)arg);
2903}
2904
2905static void
2906enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2907{
2908 AV *av = *avp;
2909 int i;
2910
2911 if (!av)
2912 return;
2913
2914 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2915 if (AvARRAY (av)[i] == (SV *)hook)
2916 {
2917 if (execute)
2918 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2919
2920 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2921 av_pop (av);
2922 av_pop (av);
2923 break;
2924 }
2925
2926 if (AvFILLp (av) >= 0)
2927 {
2928 *avp = 0;
2929 SvREFCNT_dec_NN (av);
2930 }
2931}
2932
2933static void
2934api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2935{
2936 struct coro *coro = SvSTATE (coro_sv);
2937
2938 if (SvSTATE_current == coro)
2939 if (enter)
2940 enter (aTHX_ enter_arg);
2941
2942 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2943 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2944}
2945
2946static void
2947api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2948{
2949 struct coro *coro = SvSTATE (coro_sv);
2950
2951 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2952 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2953}
2954
2955static void
2956savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2957{
2958 struct coro *coro = SvSTATE_current;
2959
2960 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2961}
2962
2963static void
2964savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2965{
2966 struct coro *coro = SvSTATE_current;
2967
2968 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2969}
2970
2971static void
2972api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2973{
2974 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2975
2976 /* this ought to be much cheaper than malloc + a single destructor call */
2977 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2978 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2979}
2980
2981/*****************************************************************************/
2982/* PerlIO::cede */
2983
2984typedef struct
2985{
2986 PerlIOBuf base;
2987 NV next, every;
2988} PerlIOCede;
2989
2990static IV ecb_cold
2991PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2992{
2993 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2994
2995 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2996 self->next = nvtime () + self->every;
2997
2998 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2999}
3000
3001static SV * ecb_cold
3002PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3003{
3004 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3005
3006 return newSVnv (self->every);
3007}
3008
3009static IV
3010PerlIOCede_flush (pTHX_ PerlIO *f)
3011{
3012 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3013 double now = nvtime ();
3014
3015 if (now >= self->next)
3016 {
3017 api_cede (aTHX);
3018 self->next = now + self->every;
3019 }
3020
3021 return PerlIOBuf_flush (aTHX_ f);
3022}
3023
3024static PerlIO_funcs PerlIO_cede =
3025{
3026 sizeof(PerlIO_funcs),
3027 "cede",
3028 sizeof(PerlIOCede),
3029 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3030 PerlIOCede_pushed,
3031 PerlIOBuf_popped,
3032 PerlIOBuf_open,
3033 PerlIOBase_binmode,
3034 PerlIOCede_getarg,
3035 PerlIOBase_fileno,
3036 PerlIOBuf_dup,
3037 PerlIOBuf_read,
3038 PerlIOBuf_unread,
3039 PerlIOBuf_write,
3040 PerlIOBuf_seek,
3041 PerlIOBuf_tell,
3042 PerlIOBuf_close,
3043 PerlIOCede_flush,
3044 PerlIOBuf_fill,
3045 PerlIOBase_eof,
3046 PerlIOBase_error,
3047 PerlIOBase_clearerr,
3048 PerlIOBase_setlinebuf,
3049 PerlIOBuf_get_base,
3050 PerlIOBuf_bufsiz,
3051 PerlIOBuf_get_ptr,
3052 PerlIOBuf_get_cnt,
3053 PerlIOBuf_set_ptrcnt,
3054};
3055
3056/*****************************************************************************/
3057/* Coro::Semaphore & Coro::Signal */
3058
3059static SV *
3060coro_waitarray_new (pTHX_ int count)
3061{
3062 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3063 AV *av = newAV ();
3064 SV **ary;
3065
3066 /* unfortunately, building manually saves memory */
3067 Newx (ary, 2, SV *);
3068 AvALLOC (av) = ary;
3069#if PERL_VERSION_ATLEAST (5,10,0)
3070 AvARRAY (av) = ary;
3071#else
3072 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3073 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3074 SvPVX ((SV *)av) = (char *)ary;
3075#endif
3076 AvMAX (av) = 1;
3077 AvFILLp (av) = 0;
3078 ary [0] = newSViv (count);
3079
3080 return newRV_noinc ((SV *)av);
3081}
3082
3083/* semaphore */
3084
3085static void
3086coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3087{
3088 SV *count_sv = AvARRAY (av)[0];
3089 IV count = SvIVX (count_sv);
3090
3091 count += adjust;
3092 SvIVX (count_sv) = count;
3093
3094 /* now wake up as many waiters as are expected to lock */
3095 while (count > 0 && AvFILLp (av) > 0)
3096 {
3097 SV *cb;
3098
3099 /* swap first two elements so we can shift a waiter */
3100 AvARRAY (av)[0] = AvARRAY (av)[1];
3101 AvARRAY (av)[1] = count_sv;
3102 cb = av_shift (av);
3103
3104 if (SvOBJECT (cb))
3105 {
3106 api_ready (aTHX_ cb);
3107 --count;
3108 }
3109 else if (SvTYPE (cb) == SVt_PVCV)
3110 {
3111 dSP;
3112 PUSHMARK (SP);
3113 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3114 PUTBACK;
3115 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3116 }
3117
3118 SvREFCNT_dec_NN (cb);
3119 }
3120}
3121
3122static void
3123coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3124{
3125 /* call $sem->adjust (0) to possibly wake up some other waiters */
3126 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3127}
3128
980static void 3129static int
981api_cede (void) 3130slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 3131{
983 dTHX; 3132 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 3133 SV *count_sv = AvARRAY (av)[0];
3134 SV *coro_hv = SvRV (coro_current);
985 3135
986 prepare_cede (&ta); 3136 frame->destroy = 0;
987 TRANSFER (ta);
988}
989 3137
3138 /* if we are about to throw, don't actually acquire the lock, just throw */
3139 if (ecb_expect_false (CORO_THROW))
3140 {
3141 /* we still might be responsible for the semaphore, so wake up others */
3142 coro_semaphore_adjust (aTHX_ av, 0);
3143
3144 return 0;
3145 }
3146 else if (SvIVX (count_sv) > 0)
3147 {
3148 if (acquire)
3149 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3150 else
3151 coro_semaphore_adjust (aTHX_ av, 0);
3152
3153 return 0;
3154 }
3155 else
3156 {
3157 int i;
3158 /* if we were woken up but can't down, we look through the whole */
3159 /* waiters list and only add us if we aren't in there already */
3160 /* this avoids some degenerate memory usage cases */
3161 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3162 if (AvARRAY (av)[i] == coro_hv)
3163 return 1;
3164
3165 av_push (av, SvREFCNT_inc (coro_hv));
3166 return 1;
3167 }
3168}
3169
3170static int
3171slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3172{
3173 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3174}
3175
3176static int
3177slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3178{
3179 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3180}
3181
3182static void
3183slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3184{
3185 AV *av = (AV *)SvRV (arg [0]);
3186
3187 if (SvIVX (AvARRAY (av)[0]) > 0)
3188 {
3189 frame->data = (void *)av;
3190 frame->prepare = prepare_nop;
3191 }
3192 else
3193 {
3194 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3195
3196 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3197 frame->prepare = prepare_schedule;
3198 /* to avoid race conditions when a woken-up coro gets terminated */
3199 /* we arrange for a temporary on_destroy that calls adjust (0) */
3200 frame->destroy = coro_semaphore_destroy;
3201 }
3202}
3203
3204static void
3205slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3208 frame->check = slf_check_semaphore_down;
3209}
3210
3211static void
3212slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3213{
3214 if (items >= 2)
3215 {
3216 /* callback form */
3217 AV *av = (AV *)SvRV (arg [0]);
3218 SV *cb_cv = s_get_cv_croak (arg [1]);
3219
3220 av_push (av, SvREFCNT_inc_NN (cb_cv));
3221
3222 if (SvIVX (AvARRAY (av)[0]) > 0)
3223 coro_semaphore_adjust (aTHX_ av, 0);
3224
3225 frame->prepare = prepare_nop;
3226 frame->check = slf_check_nop;
3227 }
3228 else
3229 {
3230 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3231 frame->check = slf_check_semaphore_wait;
3232 }
3233}
3234
3235/* signal */
3236
3237static void
3238coro_signal_wake (pTHX_ AV *av, int count)
3239{
3240 SvIVX (AvARRAY (av)[0]) = 0;
3241
3242 /* now signal count waiters */
3243 while (count > 0 && AvFILLp (av) > 0)
3244 {
3245 SV *cb;
3246
3247 /* swap first two elements so we can shift a waiter */
3248 cb = AvARRAY (av)[0];
3249 AvARRAY (av)[0] = AvARRAY (av)[1];
3250 AvARRAY (av)[1] = cb;
3251
3252 cb = av_shift (av);
3253
3254 if (SvTYPE (cb) == SVt_PVCV)
3255 {
3256 dSP;
3257 PUSHMARK (SP);
3258 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3259 PUTBACK;
3260 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3261 }
3262 else
3263 {
3264 api_ready (aTHX_ cb);
3265 sv_setiv (cb, 0); /* signal waiter */
3266 }
3267
3268 SvREFCNT_dec_NN (cb);
3269
3270 --count;
3271 }
3272}
3273
3274static int
3275slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3276{
3277 /* if we are about to throw, also stop waiting */
3278 return SvROK ((SV *)frame->data) && !CORO_THROW;
3279}
3280
3281static void
3282slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3283{
3284 AV *av = (AV *)SvRV (arg [0]);
3285
3286 if (items >= 2)
3287 {
3288 SV *cb_cv = s_get_cv_croak (arg [1]);
3289 av_push (av, SvREFCNT_inc_NN (cb_cv));
3290
3291 if (SvIVX (AvARRAY (av)[0]))
3292 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3293
3294 frame->prepare = prepare_nop;
3295 frame->check = slf_check_nop;
3296 }
3297 else if (SvIVX (AvARRAY (av)[0]))
3298 {
3299 SvIVX (AvARRAY (av)[0]) = 0;
3300 frame->prepare = prepare_nop;
3301 frame->check = slf_check_nop;
3302 }
3303 else
3304 {
3305 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3306
3307 av_push (av, waiter);
3308
3309 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3310 frame->prepare = prepare_schedule;
3311 frame->check = slf_check_signal_wait;
3312 }
3313}
3314
3315/*****************************************************************************/
3316/* Coro::AIO */
3317
3318#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3319
3320/* helper storage struct */
3321struct io_state
3322{
3323 int errorno;
3324 I32 laststype; /* U16 in 5.10.0 */
3325 int laststatval;
3326 Stat_t statcache;
3327};
3328
3329static void
3330coro_aio_callback (pTHX_ CV *cv)
3331{
3332 dXSARGS;
3333 AV *state = (AV *)S_GENSUB_ARG;
3334 SV *coro = av_pop (state);
3335 SV *data_sv = newSV (sizeof (struct io_state));
3336
3337 av_extend (state, items - 1);
3338
3339 sv_upgrade (data_sv, SVt_PV);
3340 SvCUR_set (data_sv, sizeof (struct io_state));
3341 SvPOK_only (data_sv);
3342
3343 {
3344 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3345
3346 data->errorno = errno;
3347 data->laststype = PL_laststype;
3348 data->laststatval = PL_laststatval;
3349 data->statcache = PL_statcache;
3350 }
3351
3352 /* now build the result vector out of all the parameters and the data_sv */
3353 {
3354 int i;
3355
3356 for (i = 0; i < items; ++i)
3357 av_push (state, SvREFCNT_inc_NN (ST (i)));
3358 }
3359
3360 av_push (state, data_sv);
3361
3362 api_ready (aTHX_ coro);
3363 SvREFCNT_dec_NN (coro);
3364 SvREFCNT_dec_NN ((AV *)state);
3365}
3366
3367static int
3368slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3369{
3370 AV *state = (AV *)frame->data;
3371
3372 /* if we are about to throw, return early */
3373 /* this does not cancel the aio request, but at least */
3374 /* it quickly returns */
3375 if (CORO_THROW)
3376 return 0;
3377
3378 /* one element that is an RV? repeat! */
3379 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3380 return 1;
3381
3382 /* restore status */
3383 {
3384 SV *data_sv = av_pop (state);
3385 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3386
3387 errno = data->errorno;
3388 PL_laststype = data->laststype;
3389 PL_laststatval = data->laststatval;
3390 PL_statcache = data->statcache;
3391
3392 SvREFCNT_dec_NN (data_sv);
3393 }
3394
3395 /* push result values */
3396 {
3397 dSP;
3398 int i;
3399
3400 EXTEND (SP, AvFILLp (state) + 1);
3401 for (i = 0; i <= AvFILLp (state); ++i)
3402 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3403
3404 PUTBACK;
3405 }
3406
3407 return 0;
3408}
3409
3410static void
3411slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3412{
3413 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3414 SV *coro_hv = SvRV (coro_current);
3415 struct coro *coro = SvSTATE_hv (coro_hv);
3416
3417 /* put our coroutine id on the state arg */
3418 av_push (state, SvREFCNT_inc_NN (coro_hv));
3419
3420 /* first see whether we have a non-zero priority and set it as AIO prio */
3421 if (coro->prio)
3422 {
3423 dSP;
3424
3425 static SV *prio_cv;
3426 static SV *prio_sv;
3427
3428 if (ecb_expect_false (!prio_cv))
3429 {
3430 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3431 prio_sv = newSViv (0);
3432 }
3433
3434 PUSHMARK (SP);
3435 sv_setiv (prio_sv, coro->prio);
3436 XPUSHs (prio_sv);
3437
3438 PUTBACK;
3439 call_sv (prio_cv, G_VOID | G_DISCARD);
3440 }
3441
3442 /* now call the original request */
3443 {
3444 dSP;
3445 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3446 int i;
3447
3448 PUSHMARK (SP);
3449
3450 /* first push all args to the stack */
3451 EXTEND (SP, items + 1);
3452
3453 for (i = 0; i < items; ++i)
3454 PUSHs (arg [i]);
3455
3456 /* now push the callback closure */
3457 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3458
3459 /* now call the AIO function - we assume our request is uncancelable */
3460 PUTBACK;
3461 call_sv ((SV *)req, G_VOID | G_DISCARD);
3462 }
3463
3464 /* now that the request is going, we loop till we have a result */
3465 frame->data = (void *)state;
3466 frame->prepare = prepare_schedule;
3467 frame->check = slf_check_aio_req;
3468}
3469
3470static void
3471coro_aio_req_xs (pTHX_ CV *cv)
3472{
3473 dXSARGS;
3474
3475 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3476
3477 XSRETURN_EMPTY;
3478}
3479
3480/*****************************************************************************/
3481
3482#if CORO_CLONE
3483# include "clone.c"
3484#endif
3485
3486/*****************************************************************************/
3487
3488static SV *
3489coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3490{
3491 SV *coro_sv;
3492 struct coro *coro;
3493 MAGIC *mg;
3494 HV *hv;
3495 SV *cb;
3496 int i;
3497
3498 if (argc > 0)
3499 {
3500 cb = s_get_cv_croak (argv [0]);
3501
3502 if (!is_coro)
3503 {
3504 if (CvISXSUB (cb))
3505 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3506
3507 if (!CvROOT (cb))
3508 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3509 }
3510 }
3511
3512 Newz (0, coro, 1, struct coro);
3513 coro->args = newAV ();
3514 coro->flags = CF_NEW;
3515
3516 if (coro_first) coro_first->prev = coro;
3517 coro->next = coro_first;
3518 coro_first = coro;
3519
3520 coro->hv = hv = newHV ();
3521 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3522 mg->mg_flags |= MGf_DUP;
3523 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3524
3525 if (argc > 0)
3526 {
3527 av_extend (coro->args, argc + is_coro - 1);
3528
3529 if (is_coro)
3530 {
3531 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3532 cb = (SV *)cv_coro_run;
3533 }
3534
3535 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3536
3537 for (i = 1; i < argc; i++)
3538 av_push (coro->args, newSVsv (argv [i]));
3539 }
3540
3541 return coro_sv;
3542}
3543
3544#ifndef __cplusplus
3545ecb_cold XS(boot_Coro__State);
3546#endif
3547
3548#if CORO_JIT
3549
3550static void ecb_noinline ecb_cold
3551pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3552{
3553 dSP;
3554 AV *av = newAV ();
3555
3556 av_store (av, 3, newSVuv (d));
3557 av_store (av, 2, newSVuv (c));
3558 av_store (av, 1, newSVuv (b));
3559 av_store (av, 0, newSVuv (a));
3560
3561 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3562
3563 PUTBACK;
3564}
3565
3566static void ecb_noinline ecb_cold
3567jit_init (pTHX)
3568{
3569 dSP;
3570 SV *load, *save;
3571 char *map_base;
3572 char *load_ptr, *save_ptr;
3573 STRLEN load_len, save_len, map_len;
3574 int count;
3575
3576 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3577
3578 PUSHMARK (SP);
3579 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3580 #include "state.h"
3581 count = call_pv ("Coro::State::_jit", G_ARRAY);
3582 SPAGAIN;
3583
3584 save = POPs; save_ptr = SvPVbyte (save, save_len);
3585 load = POPs; load_ptr = SvPVbyte (load, load_len);
3586
3587 map_len = load_len + save_len + 16;
3588
3589 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3590
3591 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3592
3593 load_perl_slots = (load_save_perl_slots_type)map_base;
3594 memcpy (map_base, load_ptr, load_len);
3595
3596 map_base += (load_len + 15) & ~15;
3597
3598 save_perl_slots = (load_save_perl_slots_type)map_base;
3599 memcpy (map_base, save_ptr, save_len);
3600
3601 /* we are good citizens and try to make the page read-only, so the evil evil */
3602 /* hackers might have it a bit more difficult */
3603 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3604
3605 PUTBACK;
3606 eval_pv ("undef &Coro::State::_jit", 1);
3607}
3608
3609#endif
3610
990MODULE = Coro::State PACKAGE = Coro::State 3611MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 3612
992PROTOTYPES: DISABLE 3613PROTOTYPES: DISABLE
993 3614
994BOOT: 3615BOOT:
995{ 3616{
3617#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3618#include "state.h"
996#ifdef USE_ITHREADS 3619#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 3620# if CORO_PTHREAD
3621 coro_thx = PERL_GET_CONTEXT;
998#endif 3622# endif
999 BOOT_PAGESIZE; 3623#endif
3624 /* perl defines these to check for existance first, but why it doesn't */
3625 /* just create them one at init time is not clear to me, except for */
3626 /* programs trying to delete them, but... */
3627 /* anyway, we declare this as invalid and make sure they are initialised here */
3628 DEFSV;
3629 ERRSV;
3630
3631 cctx_current = cctx_new_empty ();
3632
3633 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3634 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3635
3636 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3637 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3638 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3639
3640 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3641 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1000 3642
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3643 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 3644
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3645 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3646 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3647 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3648 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 3649
1007 main_mainstack = PL_mainstack; 3650 main_mainstack = PL_mainstack;
3651 main_top_env = PL_top_env;
1008 3652
3653 while (main_top_env->je_prev)
3654 main_top_env = main_top_env->je_prev;
3655
3656 {
3657 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3658
3659 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3660 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3661
3662 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3663 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3664 }
3665
1009 coroapi.ver = CORO_API_VERSION; 3666 coroapi.ver = CORO_API_VERSION;
3667 coroapi.rev = CORO_API_REVISION;
3668
1010 coroapi.transfer = api_transfer; 3669 coroapi.transfer = api_transfer;
1011 3670
3671 coroapi.sv_state = SvSTATE_;
3672 coroapi.execute_slf = api_execute_slf;
3673 coroapi.prepare_nop = prepare_nop;
3674 coroapi.prepare_schedule = prepare_schedule;
3675 coroapi.prepare_cede = prepare_cede;
3676 coroapi.prepare_cede_notself = prepare_cede_notself;
3677
3678 time_init (aTHX);
3679
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3680 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3681#if CORO_JIT
3682 PUTBACK;
3683 jit_init (aTHX);
3684 SPAGAIN;
3685#endif
1013} 3686}
1014 3687
1015SV * 3688SV *
1016new (char *klass, ...) 3689new (SV *klass, ...)
3690 ALIAS:
3691 Coro::new = 1
1017 CODE: 3692 CODE:
1018{ 3693 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1019 struct coro *coro; 3694 OUTPUT:
1020 HV *hv; 3695 RETVAL
1021 int i;
1022 3696
1023 Newz (0, coro, 1, struct coro); 3697void
1024 coro->args = newAV (); 3698transfer (...)
3699 PROTOTYPE: $$
3700 CODE:
3701 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1025 3702
3703SV *
3704clone (Coro::State coro)
3705 CODE:
3706{
3707#if CORO_CLONE
3708 struct coro *ncoro = coro_clone (aTHX_ coro);
3709 MAGIC *mg;
3710 /* TODO: too much duplication */
1026 hv = newHV (); 3711 ncoro->hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3712 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3713 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3714 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3715#else
3716 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3717#endif
3718}
3719 OUTPUT:
3720 RETVAL
1029 3721
1030 for (i = 1; i < items; i++) 3722int
1031 av_push (coro->args, newSVsv (ST (i))); 3723cctx_stacksize (int new_stacksize = 0)
3724 PROTOTYPE: ;$
3725 CODE:
3726 RETVAL = cctx_stacksize;
3727 if (new_stacksize)
3728 {
3729 cctx_stacksize = new_stacksize;
3730 ++cctx_gen;
3731 }
3732 OUTPUT:
3733 RETVAL
1032 3734
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3735int
1034 /*coro->stack = 0;*/ 3736cctx_max_idle (int max_idle = 0)
3737 PROTOTYPE: ;$
3738 CODE:
3739 RETVAL = cctx_max_idle;
3740 if (max_idle > 1)
3741 cctx_max_idle = max_idle;
3742 OUTPUT:
3743 RETVAL
3744
3745int
3746cctx_count ()
3747 PROTOTYPE:
3748 CODE:
3749 RETVAL = cctx_count;
3750 OUTPUT:
3751 RETVAL
3752
3753int
3754cctx_idle ()
3755 PROTOTYPE:
3756 CODE:
3757 RETVAL = cctx_idle;
3758 OUTPUT:
3759 RETVAL
3760
3761void
3762list ()
3763 PROTOTYPE:
3764 PPCODE:
3765{
3766 struct coro *coro;
3767 for (coro = coro_first; coro; coro = coro->next)
3768 if (coro->hv)
3769 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3770}
3771
3772void
3773call (Coro::State coro, SV *coderef)
3774 ALIAS:
3775 eval = 1
3776 CODE:
3777{
3778 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3779 {
3780 struct coro *current = SvSTATE_current;
3781 struct CoroSLF slf_save;
3782
3783 if (current != coro)
3784 {
3785 PUTBACK;
3786 save_perl (aTHX_ current);
3787 load_perl (aTHX_ coro);
3788 /* the coro is most likely in an active SLF call.
3789 * while not strictly required (the code we execute is
3790 * not allowed to call any SLF functions), it's cleaner
3791 * to reinitialise the slf_frame and restore it later.
3792 * This might one day allow us to actually do SLF calls
3793 * from code executed here.
3794 */
3795 slf_save = slf_frame;
3796 slf_frame.prepare = 0;
3797 SPAGAIN;
3798 }
3799
3800 PUSHSTACK;
3801
3802 PUSHMARK (SP);
3803 PUTBACK;
3804
3805 if (ix)
3806 eval_sv (coderef, 0);
3807 else
3808 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3809
3810 POPSTACK;
3811 SPAGAIN;
3812
3813 if (current != coro)
3814 {
3815 PUTBACK;
3816 slf_frame = slf_save;
3817 save_perl (aTHX_ coro);
3818 load_perl (aTHX_ current);
3819 SPAGAIN;
3820 }
3821 }
3822}
3823
3824SV *
3825is_ready (Coro::State coro)
3826 PROTOTYPE: $
3827 ALIAS:
3828 is_ready = CF_READY
3829 is_running = CF_RUNNING
3830 is_new = CF_NEW
3831 is_destroyed = CF_ZOMBIE
3832 is_zombie = CF_ZOMBIE
3833 is_suspended = CF_SUSPENDED
3834 CODE:
3835 RETVAL = boolSV (coro->flags & ix);
3836 OUTPUT:
3837 RETVAL
3838
3839void
3840throw (SV *self, SV *exception = &PL_sv_undef)
3841 PROTOTYPE: $;$
3842 CODE:
3843{
3844 struct coro *coro = SvSTATE (self);
3845 struct coro *current = SvSTATE_current;
3846 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3847 SvREFCNT_dec (*exceptionp);
3848 SvGETMAGIC (exception);
3849 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3850
3851 api_ready (aTHX_ self);
3852}
3853
3854void
3855api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3856 PROTOTYPE: $;$
3857 C_ARGS: aTHX_ coro, flags
3858
3859SV *
3860has_cctx (Coro::State coro)
3861 PROTOTYPE: $
3862 CODE:
3863 /* maybe manage the running flag differently */
3864 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3865 OUTPUT:
3866 RETVAL
3867
3868int
3869is_traced (Coro::State coro)
3870 PROTOTYPE: $
3871 CODE:
3872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3873 OUTPUT:
3874 RETVAL
3875
3876UV
3877rss (Coro::State coro)
3878 PROTOTYPE: $
3879 ALIAS:
3880 usecount = 1
3881 CODE:
3882 switch (ix)
3883 {
3884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3885 case 1: RETVAL = coro->usecount; break;
3886 }
3887 OUTPUT:
3888 RETVAL
3889
3890void
3891force_cctx ()
3892 PROTOTYPE:
3893 CODE:
3894 cctx_current->idle_sp = 0;
3895
3896void
3897swap_defsv (Coro::State self)
3898 PROTOTYPE: $
3899 ALIAS:
3900 swap_defav = 1
3901 CODE:
3902 if (!self->slot)
3903 croak ("cannot swap state with coroutine that has no saved state,");
3904 else
3905 {
3906 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3907 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3908
3909 SV *tmp = *src; *src = *dst; *dst = tmp;
3910 }
3911
3912void
3913cancel (Coro::State self)
3914 CODE:
3915 coro_state_destroy (aTHX_ self);
3916
3917SV *
3918enable_times (int enabled = enable_times)
3919 CODE:
3920{
3921 RETVAL = boolSV (enable_times);
3922
3923 if (enabled != enable_times)
3924 {
3925 enable_times = enabled;
3926
3927 coro_times_update ();
3928 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3929 }
1035} 3930}
1036 OUTPUT: 3931 OUTPUT:
1037 RETVAL 3932 RETVAL
1038 3933
1039void 3934void
1040_set_stacklevel (...) 3935times (Coro::State self)
1041 ALIAS: 3936 PPCODE:
1042 Coro::State::transfer = 1
1043 Coro::schedule = 2
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{ 3937{
1048 struct transfer_args ta; 3938 struct coro *current = SvSTATE (coro_current);
1049 3939
1050 switch (ix) 3940 if (ecb_expect_false (current == self))
1051 { 3941 {
1052 case 0: 3942 coro_times_update ();
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3943 coro_times_add (SvSTATE (coro_current));
1054 ta.next = 0; 3944 }
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break;
1057 3945
1058 case 1: 3946 EXTEND (SP, 2);
1059 if (items != 3) 3947 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 3948 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
1061 3949
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 3950 if (ecb_expect_false (current == self))
1063 break; 3951 coro_times_sub (SvSTATE (coro_current));
3952}
1064 3953
1065 case 2: 3954void
1066 prepare_schedule (&ta); 3955swap_sv (Coro::State coro, SV *sva, SV *svb)
1067 break; 3956 CODE:
3957{
3958 struct coro *current = SvSTATE_current;
3959 AV *swap_sv;
3960 int i;
1068 3961
1069 case 3: 3962 sva = SvRV (sva);
1070 prepare_cede (&ta); 3963 svb = SvRV (svb);
1071 break;
1072 3964
1073 case 4: 3965 if (current == coro)
3966 SWAP_SVS_LEAVE (current);
3967
3968 if (!coro->swap_sv)
3969 coro->swap_sv = newAV ();
3970
3971 swap_sv = coro->swap_sv;
3972
3973 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3974 {
3975 SV *a = AvARRAY (swap_sv)[i ];
3976 SV *b = AvARRAY (swap_sv)[i + 1];
3977
3978 if (a == sva && b == svb)
1074 { 3979 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv); 3980 SvREFCNT_dec_NN (a);
3981 SvREFCNT_dec_NN (b);
3982
3983 for (; i <= AvFILLp (swap_sv) - 2; i++)
3984 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3985
3986 AvFILLp (swap_sv) -= 2;
3987
3988 goto removed;
1096 } 3989 }
1097 break;
1098
1099 } 3990 }
1100 3991
1101 TRANSFER (ta); 3992 av_push (swap_sv, SvREFCNT_inc_NN (sva));
1102} 3993 av_push (swap_sv, SvREFCNT_inc_NN (svb));
1103 3994
1104void 3995 removed:
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109 3996
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3997 if (current == coro)
1111 3998 SWAP_SVS_ENTER (current);
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114} 3999}
1115 4000
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code)
1124 int code
1125 PROTOTYPE: $
1126 CODE:
1127 _exit (code);
1128 4001
1129MODULE = Coro::State PACKAGE = Coro 4002MODULE = Coro::State PACKAGE = Coro
1130 4003
1131BOOT: 4004BOOT:
1132{ 4005{
1133 int i; 4006 if (SVt_LAST > 32)
4007 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1134 4008
4009 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4010 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4011 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4012 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4013 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4014 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4015 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4016 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4017
4018 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4019 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4020 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4021 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4022
1135 coro_stash = gv_stashpv ("Coro", TRUE); 4023 coro_stash = gv_stashpv ("Coro", TRUE);
1136 4024
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4025 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4026 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4027 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4028 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4029 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4030 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1143
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV ();
1149 4031
1150 { 4032 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 4033 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 4034
1153 coroapi.schedule = api_schedule; 4035 coroapi.schedule = api_schedule;
4036 coroapi.schedule_to = api_schedule_to;
1154 coroapi.cede = api_cede; 4037 coroapi.cede = api_cede;
4038 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 4039 coroapi.ready = api_ready;
4040 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 4041 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 4042 coroapi.current = coro_current;
1158 4043
4044 coroapi.enterleave_hook = api_enterleave_hook;
4045 coroapi.enterleave_unhook = api_enterleave_unhook;
4046 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4047
1159 GCoroAPI = &coroapi; 4048 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 4049 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 4050 SvREADONLY_on (sv);
1162 } 4051 }
1163} 4052}
1164 4053
4054SV *
4055async (...)
4056 PROTOTYPE: &@
4057 CODE:
4058 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4059 api_ready (aTHX_ RETVAL);
4060 OUTPUT:
4061 RETVAL
4062
4063void
4064_destroy (Coro::State coro)
4065 CODE:
4066 /* used by the manager thread */
4067 coro_state_destroy (aTHX_ coro);
4068
4069void
4070on_destroy (Coro::State coro, SV *cb)
4071 CODE:
4072 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4073
4074void
4075join (...)
4076 CODE:
4077 CORO_EXECUTE_SLF_XS (slf_init_join);
4078
4079void
4080terminate (...)
4081 CODE:
4082 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4083
4084void
4085cancel (...)
4086 CODE:
4087 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4088
4089int
4090safe_cancel (Coro::State self, ...)
4091 C_ARGS: aTHX_ self, &ST (1), items - 1
4092
4093void
4094schedule (...)
4095 CODE:
4096 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4097
4098void
4099schedule_to (...)
4100 CODE:
4101 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4102
4103void
4104cede_to (...)
4105 CODE:
4106 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4107
4108void
4109cede (...)
4110 CODE:
4111 CORO_EXECUTE_SLF_XS (slf_init_cede);
4112
4113void
4114cede_notself (...)
4115 CODE:
4116 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4117
4118void
4119_set_current (SV *current)
4120 PROTOTYPE: $
4121 CODE:
4122 SvREFCNT_dec_NN (SvRV (coro_current));
4123 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4124
4125void
4126_set_readyhook (SV *hook)
4127 PROTOTYPE: $
4128 CODE:
4129 SvREFCNT_dec (coro_readyhook);
4130 SvGETMAGIC (hook);
4131 if (SvOK (hook))
4132 {
4133 coro_readyhook = newSVsv (hook);
4134 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4135 }
4136 else
4137 {
4138 coro_readyhook = 0;
4139 CORO_READYHOOK = 0;
4140 }
4141
1165int 4142int
1166prio (Coro::State coro, int newprio = 0) 4143prio (Coro::State coro, int newprio = 0)
4144 PROTOTYPE: $;$
1167 ALIAS: 4145 ALIAS:
1168 nice = 1 4146 nice = 1
1169 CODE: 4147 CODE:
1170{ 4148{
1171 RETVAL = coro->prio; 4149 RETVAL = coro->prio;
1172 4150
1173 if (items > 1) 4151 if (items > 1)
1174 { 4152 {
1175 if (ix) 4153 if (ix)
1176 newprio += coro->prio; 4154 newprio = coro->prio - newprio;
1177 4155
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4156 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4157 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1180 4158
1181 coro->prio = newprio; 4159 coro->prio = newprio;
1182 } 4160 }
1183} 4161}
4162 OUTPUT:
4163 RETVAL
1184 4164
1185void 4165SV *
1186ready (SV *self) 4166ready (SV *self)
1187 PROTOTYPE: $ 4167 PROTOTYPE: $
1188 CODE: 4168 CODE:
1189 api_ready (self); 4169 RETVAL = boolSV (api_ready (aTHX_ self));
4170 OUTPUT:
4171 RETVAL
1190 4172
1191int 4173int
1192nready (...) 4174nready (...)
1193 PROTOTYPE: 4175 PROTOTYPE:
1194 CODE: 4176 CODE:
1195 RETVAL = coro_nready; 4177 RETVAL = coro_nready;
1196 OUTPUT: 4178 OUTPUT:
1197 RETVAL 4179 RETVAL
1198 4180
1199MODULE = Coro::State PACKAGE = Coro::AIO 4181void
4182suspend (Coro::State self)
4183 PROTOTYPE: $
4184 CODE:
4185 self->flags |= CF_SUSPENDED;
4186
4187void
4188resume (Coro::State self)
4189 PROTOTYPE: $
4190 CODE:
4191 self->flags &= ~CF_SUSPENDED;
4192
4193void
4194_pool_handler (...)
4195 CODE:
4196 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4197
4198void
4199async_pool (SV *cv, ...)
4200 PROTOTYPE: &@
4201 PPCODE:
4202{
4203 HV *hv = (HV *)av_pop (av_async_pool);
4204 AV *av = newAV ();
4205 SV *cb = ST (0);
4206 int i;
4207
4208 av_extend (av, items - 2);
4209 for (i = 1; i < items; ++i)
4210 av_push (av, SvREFCNT_inc_NN (ST (i)));
4211
4212 if ((SV *)hv == &PL_sv_undef)
4213 {
4214 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4215 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4216 SvREFCNT_dec_NN (sv);
4217 }
4218
4219 {
4220 struct coro *coro = SvSTATE_hv (hv);
4221
4222 assert (!coro->invoke_cb);
4223 assert (!coro->invoke_av);
4224 coro->invoke_cb = SvREFCNT_inc (cb);
4225 coro->invoke_av = av;
4226 }
4227
4228 api_ready (aTHX_ (SV *)hv);
4229
4230 if (GIMME_V != G_VOID)
4231 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4232 else
4233 SvREFCNT_dec_NN (hv);
4234}
1200 4235
1201SV * 4236SV *
1202_get_state () 4237rouse_cb ()
4238 PROTOTYPE:
1203 CODE: 4239 CODE:
1204{ 4240 RETVAL = coro_new_rouse_cb (aTHX);
1205 struct {
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218}
1219 OUTPUT: 4241 OUTPUT:
1220 RETVAL 4242 RETVAL
1221 4243
1222void 4244void
1223_set_state (char *data_) 4245rouse_wait (...)
4246 PROTOTYPE: ;$
4247 PPCODE:
4248 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4249
4250void
4251on_enter (SV *block)
4252 ALIAS:
4253 on_leave = 1
1224 PROTOTYPE: $ 4254 PROTOTYPE: &
1225 CODE: 4255 CODE:
1226{ 4256{
1227 struct { 4257 struct coro *coro = SvSTATE_current;
4258 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4259
4260 block = s_get_cv_croak (block);
4261
4262 if (!*avp)
4263 *avp = newAV ();
4264
4265 av_push (*avp, SvREFCNT_inc (block));
4266
4267 if (!ix)
4268 on_enterleave_call (aTHX_ block);
4269
4270 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4271 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4272 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4273}
4274
4275
4276MODULE = Coro::State PACKAGE = PerlIO::cede
4277
4278BOOT:
4279 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4280
4281
4282MODULE = Coro::State PACKAGE = Coro::Semaphore
4283
4284SV *
4285new (SV *klass, SV *count = 0)
4286 CODE:
4287{
4288 int semcnt = 1;
4289
4290 if (count)
4291 {
4292 SvGETMAGIC (count);
4293
4294 if (SvOK (count))
4295 semcnt = SvIV (count);
4296 }
4297
4298 RETVAL = sv_bless (
4299 coro_waitarray_new (aTHX_ semcnt),
4300 GvSTASH (CvGV (cv))
4301 );
4302}
4303 OUTPUT:
4304 RETVAL
4305
4306# helper for Coro::Channel and others
4307SV *
4308_alloc (int count)
4309 CODE:
4310 RETVAL = coro_waitarray_new (aTHX_ count);
4311 OUTPUT:
4312 RETVAL
4313
4314SV *
4315count (SV *self)
4316 CODE:
4317 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4318 OUTPUT:
4319 RETVAL
4320
4321void
4322up (SV *self)
4323 CODE:
4324 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4325
4326void
4327adjust (SV *self, int adjust)
4328 CODE:
4329 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4330
4331void
4332down (...)
4333 CODE:
4334 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4335
4336void
4337wait (...)
4338 CODE:
4339 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4340
4341void
4342try (SV *self)
4343 PPCODE:
4344{
4345 AV *av = (AV *)SvRV (self);
4346 SV *count_sv = AvARRAY (av)[0];
4347 IV count = SvIVX (count_sv);
4348
4349 if (count > 0)
4350 {
4351 --count;
4352 SvIVX (count_sv) = count;
4353 XSRETURN_YES;
4354 }
4355 else
4356 XSRETURN_NO;
4357}
4358
4359void
4360waiters (SV *self)
4361 PPCODE:
4362{
4363 AV *av = (AV *)SvRV (self);
4364 int wcount = AvFILLp (av) + 1 - 1;
4365
4366 if (GIMME_V == G_SCALAR)
4367 XPUSHs (sv_2mortal (newSViv (wcount)));
4368 else
4369 {
1228 int errorno; 4370 int i;
1229 int laststype; 4371 EXTEND (SP, wcount);
1230 int laststatval; 4372 for (i = 1; i <= wcount; ++i)
1231 Stat_t statcache; 4373 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1232 } *data = (void *)data_; 4374 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 4375}
4376
4377MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4378
4379void
4380_may_delete (SV *sem, int count, unsigned int extra_refs)
4381 PPCODE:
4382{
4383 AV *av = (AV *)SvRV (sem);
4384
4385 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4386 && AvFILLp (av) == 0 /* no waiters, just count */
4387 && SvIV (AvARRAY (av)[0]) == count)
4388 XSRETURN_YES;
4389
4390 XSRETURN_NO;
4391}
4392
4393MODULE = Coro::State PACKAGE = Coro::Signal
4394
4395SV *
4396new (SV *klass)
4397 CODE:
4398 RETVAL = sv_bless (
4399 coro_waitarray_new (aTHX_ 0),
4400 GvSTASH (CvGV (cv))
4401 );
4402 OUTPUT:
4403 RETVAL
4404
4405void
4406wait (...)
4407 CODE:
4408 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4409
4410void
4411broadcast (SV *self)
4412 CODE:
4413{
4414 AV *av = (AV *)SvRV (self);
4415 coro_signal_wake (aTHX_ av, AvFILLp (av));
4416}
4417
4418void
4419send (SV *self)
4420 CODE:
4421{
4422 AV *av = (AV *)SvRV (self);
4423
4424 if (AvFILLp (av))
4425 coro_signal_wake (aTHX_ av, 1);
4426 else
4427 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4428}
4429
4430IV
4431awaited (SV *self)
4432 CODE:
4433 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4434 OUTPUT:
4435 RETVAL
4436
4437
4438MODULE = Coro::State PACKAGE = Coro::AnyEvent
4439
4440BOOT:
4441 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4442
4443void
4444_schedule (...)
4445 CODE:
4446{
4447 static int incede;
4448
4449 api_cede_notself (aTHX);
4450
4451 ++incede;
4452 while (coro_nready >= incede && api_cede (aTHX))
4453 ;
4454
4455 sv_setsv (sv_activity, &PL_sv_undef);
4456 if (coro_nready >= incede)
4457 {
4458 PUSHMARK (SP);
4459 PUTBACK;
4460 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4461 }
4462
4463 --incede;
4464}
4465
4466
4467MODULE = Coro::State PACKAGE = Coro::AIO
4468
4469void
4470_register (char *target, char *proto, SV *req)
4471 CODE:
4472{
4473 SV *req_cv = s_get_cv_croak (req);
4474 /* newXSproto doesn't return the CV on 5.8 */
4475 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4476 sv_setpv ((SV *)slf_cv, proto);
4477 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4478}
4479
4480MODULE = Coro::State PACKAGE = Coro::Select
4481
4482void
4483patch_pp_sselect ()
4484 CODE:
4485 if (!coro_old_pp_sselect)
4486 {
4487 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4488 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4489 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4490 }
4491
4492void
4493unpatch_pp_sselect ()
4494 CODE:
4495 if (coro_old_pp_sselect)
4496 {
4497 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4498 coro_old_pp_sselect = 0;
4499 }
4500
4501MODULE = Coro::State PACKAGE = Coro::Util
4502
4503void
4504_exit (int code)
4505 CODE:
4506 _exit (code);
4507
4508NV
4509time ()
4510 CODE:
4511 RETVAL = nvtime (aTHX);
4512 OUTPUT:
4513 RETVAL
4514
4515NV
4516gettimeofday ()
4517 PPCODE:
4518{
4519 UV tv [2];
4520 u2time (aTHX_ tv);
4521 EXTEND (SP, 2);
4522 PUSHs (sv_2mortal (newSVuv (tv [0])));
4523 PUSHs (sv_2mortal (newSVuv (tv [1])));
4524}
4525

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