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Comparing Coro/Coro/State.xs (file contents):
Revision 1.73 by root, Sat Feb 4 06:01:13 2006 UTC vs.
Revision 1.462 by root, Wed Jun 22 20:24:38 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
13# define PL_ppaddr ppaddr 20#include "ecb.h"
21
22#include <stddef.h>
23#include <stdio.h>
24#include <errno.h>
25#include <assert.h>
26
27#ifndef SvREFCNT_dec_NN
28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
14# endif 47# endif
15# ifndef call_sv 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
16# define call_sv perl_call_sv 49# define PadlistMAX(pl) AvFILLp (pl)
50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
51# define PadARRAY AvARRAY
52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
74#else
75# include <inttypes.h> /* most portable stdint.h */
76#endif
77
78/* the maximum number of idle cctx that will be pooled */
79static int cctx_max_idle = 4;
80
81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
82# define HAS_SCOPESTACK_NAME 1
83#endif
84
85/* prefer perl internal functions over our own? */
86#ifndef CORO_PREFER_PERL_FUNCTIONS
87# define CORO_PREFER_PERL_FUNCTIONS 0
88#endif
89
90/* The next macros try to return the current stack pointer, in an as
91 * portable way as possible. */
92#if __GNUC__ >= 4
93# define dSTACKLEVEL int stacklevel_dummy
94# define STACKLEVEL __builtin_frame_address (0)
95#else
96# define dSTACKLEVEL volatile void *stacklevel
97# define STACKLEVEL ((void *)&stacklevel)
98#endif
99
100#define IN_DESTRUCT PL_dirty
101
102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
17# endif 108# endif
18# ifndef get_sv 109#endif
19# define get_sv perl_get_sv 110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
20# endif 118# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif 119#endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 120
32#include <errno.h> 121static double (*nvtime)(); /* so why doesn't it take void? */
33#include <signal.h> 122static void (*u2time)(pTHX_ UV ret[2]);
34 123
35#ifdef HAVE_MMAP 124/* we hijack an hopefully unused CV flag for our purposes */
36# include <unistd.h> 125#define CVf_SLF 0x4000
37# include <sys/mman.h> 126static OP *pp_slf (pTHX);
38# ifndef MAP_ANONYMOUS 127static void slf_destroy (pTHX_ struct coro *coro);
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif
44# endif
45#endif
46 128
47#define SUB_INIT "Coro::State::initialize" 129static U32 cctx_gen;
48#define UCORO_STATE "_coro_state" 130static size_t cctx_stacksize = CORO_STACKSIZE;
49
50/* The next macro should declare a variable stacklevel that contains and approximation
51 * to the current C stack pointer. Its property is that it changes with each call
52 * and should be unique. */
53#define dSTACKLEVEL void *stacklevel = &stacklevel
54
55#define IN_DESTRUCT (PL_main_cv == Nullcv)
56
57#define labs(l) ((l) >= 0 ? (l) : -(l))
58
59#include "CoroAPI.h"
60
61#ifdef USE_ITHREADS
62static perl_mutex coro_mutex;
63# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
65#else
66# define LOCK (void)0
67# define UNLOCK (void)0
68#endif
69
70static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
71static 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;
72static HV *coro_state_stash; 134static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
76 136
77/* this is actually not only the c stack but also c registers etc... */ 137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum
167{
168 CC_MAPPED = 0x01,
169 CC_NOREUSE = 0x02, /* throw this away after tracing */
170 CC_TRACE = 0x04,
171 CC_TRACE_SUB = 0x08, /* trace sub calls */
172 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174};
175
176/* this is a structure representing a c-level coroutine */
78typedef struct { 177typedef struct coro_cctx
79 int refcnt; /* pointer reference counter */ 178{
80 int usecnt; /* shared by how many coroutines */ 179 struct coro_cctx *next;
81 int gencnt; /* generation counter */
82 180
181 /* the stack */
182 struct coro_stack stack;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186#ifndef NDEBUG
187 JMPENV *idle_te; /* same as idle_sp, but for top_env */
188#endif
189 JMPENV *top_env;
83 coro_context cctx; 190 coro_context cctx;
84 191
85 void *sptr; 192 U32 gen;
86 long ssize; /* positive == mmap, otherwise malloc */ 193#if CORO_USE_VALGRIND
87} coro_stack; 194 int valgrind_id;
195#endif
196 unsigned char flags;
197} coro_cctx;
88 198
199static coro_cctx *cctx_current; /* the currently running cctx */
200
201/*****************************************************************************/
202
203static MGVTBL coro_state_vtbl;
204
205enum
206{
207 CF_RUNNING = 0x0001, /* coroutine is running */
208 CF_READY = 0x0002, /* coroutine is ready */
209 CF_NEW = 0x0004, /* has never been switched to */
210 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
211 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
212 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
213};
214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
216typedef struct
217{
218 #define VARx(name,expr,type) type name;
219 #include "state.h"
220} perl_slots;
221
222/* how many context stack entries do we need for perl_slots */
223#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
224
225/* this is a structure representing a perl-level coroutine */
89struct coro { 226struct coro
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 227{
91 JMPENV start_env; 228 /* the C coroutine allocated to this perl coroutine, if any */
229 coro_cctx *cctx;
92 230
93 /* the optional C context */ 231 /* ready queue */
94 coro_stack *stack; 232 struct coro *next_ready;
95 void *cursp;
96 int gencnt;
97 233
98 /* optionally saved, might be zero */ 234 /* state data */
99 AV *defav; 235 struct CoroSLF slf_frame; /* saved slf frame */
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack; 236 AV *mainstack;
111 SV **stack_sp; 237 perl_slots *slot; /* basically the saved sp */
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 238
239 CV *startcv; /* the CV to execute */
138 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
139 AV *args; 241 int flags; /* CF_ flags */
242 HV *hv; /* the perl hash associated with this coro, if any */
243
244 /* statistics */
245 int usecount; /* number of transfers to this coro */
246
247 /* coro process data */
248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb; /* last rouse callback */
251 AV *on_destroy; /* callbacks or coros to notify on destroy */
252 AV *status; /* the exit status list */
253
254 /* async_pool */
255 SV *saved_deffh;
256 SV *invoke_cb;
257 AV *invoke_av;
258
259 /* on_enter/on_leave */
260 AV *on_enter; AV *on_enter_xs;
261 AV *on_leave; AV *on_leave_xs;
262
263 /* swap_sv */
264 AV *swap_sv;
265
266 /* times */
267 coro_ts t_cpu, t_real;
268
269 /* linked list */
270 struct coro *next, *prev;
140}; 271};
141 272
142typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
144 275
145/* mostly copied from op.c:cv_clone2 */ 276/* the following variables are effectively part of the perl context */
146STATIC AV * 277/* and get copied between struct coro and these variables */
147clone_padlist (pTHX_ AV *protopadlist) 278/* the main reason we don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
281/** Coro ********************************************************************/
282
283#define CORO_PRIO_MAX 3
284#define CORO_PRIO_HIGH 1
285#define CORO_PRIO_NORMAL 0
286#define CORO_PRIO_LOW -1
287#define CORO_PRIO_IDLE -3
288#define CORO_PRIO_MIN -4
289
290/* for Coro.pm */
291static SV *coro_current;
292static SV *coro_readyhook;
293static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
294static CV *cv_coro_run;
295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** JIT *********************************************************************/
299
300#if CORO_JIT
301 /* APPLE doesn't have mmap though */
302 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
303 #ifndef CORO_JIT_TYPE
304 #if ECB_AMD64 && CORO_JIT_UNIXY
305 #define CORO_JIT_TYPE "amd64-unix"
306 #elif __i386 && CORO_JIT_UNIXY
307 #define CORO_JIT_TYPE "x86-unix"
308 #endif
309 #endif
310#endif
311
312#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
313 #undef CORO_JIT
314#endif
315
316#if CORO_JIT
317 typedef void (*load_save_perl_slots_type)(perl_slots *);
318 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
319#endif
320
321/** Coro::Select ************************************************************/
322
323static OP *(*coro_old_pp_sselect) (pTHX);
324static SV *coro_select_select;
325
326/* horrible hack, but if it works... */
327static OP *
328coro_pp_sselect (pTHX)
148{ 329{
149 AV *av; 330 dSP;
150 I32 ix; 331 PUSHMARK (SP - 4); /* fake argument list */
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 332 XPUSHs (coro_select_select);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 333 PUTBACK;
153 SV **pname = AvARRAY (protopad_name); 334
154 SV **ppad = AvARRAY (protopad); 335 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
155 I32 fname = AvFILLp (protopad_name); 336 PL_op->op_flags |= OPf_STACKED;
156 I32 fpad = AvFILLp (protopad); 337 PL_op->op_private = 0;
157 AV *newpadlist, *newpad_name, *newpad; 338 return PL_ppaddr [OP_ENTERSUB](aTHX);
339}
340
341/** time stuff **************************************************************/
342
343#ifdef HAS_GETTIMEOFDAY
344
345ecb_inline void
346coro_u2time (pTHX_ UV ret[2])
347{
348 struct timeval tv;
349 gettimeofday (&tv, 0);
350
351 ret [0] = tv.tv_sec;
352 ret [1] = tv.tv_usec;
353}
354
355ecb_inline double
356coro_nvtime (void)
357{
358 struct timeval tv;
359 gettimeofday (&tv, 0);
360
361 return tv.tv_sec + tv.tv_usec * 1e-6;
362}
363
364ecb_inline void
365time_init (pTHX)
366{
367 nvtime = coro_nvtime;
368 u2time = coro_u2time;
369}
370
371#else
372
373ecb_inline void
374time_init (pTHX)
375{
158 SV **npad; 376 SV **svp;
159 377
160 newpad_name = newAV (); 378 require_pv ("Time/HiRes.pm");
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163 379
164 newpad = newAV (); 380 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 381
168 newpadlist = newAV (); 382 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
383 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
384
385 nvtime = INT2PTR (double (*)(), SvIV (*svp));
386
387 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
388 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
389}
390
391#endif
392
393/** lowlevel stuff **********************************************************/
394
395static SV * ecb_noinline
396coro_get_sv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_sv (name, create);
401#endif
402 return get_sv (name, create);
403}
404
405static AV * ecb_noinline
406coro_get_av (pTHX_ const char *name, int create)
407{
408#if PERL_VERSION_ATLEAST (5,10,0)
409 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
410 get_av (name, create);
411#endif
412 return get_av (name, create);
413}
414
415static HV * ecb_noinline
416coro_get_hv (pTHX_ const char *name, int create)
417{
418#if PERL_VERSION_ATLEAST (5,10,0)
419 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
420 get_hv (name, create);
421#endif
422 return get_hv (name, create);
423}
424
425ecb_inline void
426coro_times_update (void)
427{
428#ifdef coro_clock_gettime
429 struct timespec ts;
430
431 ts.tv_sec = ts.tv_nsec = 0;
432 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
433 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
434
435 ts.tv_sec = ts.tv_nsec = 0;
436 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
437 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
438#else
439 dTHX;
440 UV tv[2];
441
442 u2time (aTHX_ tv);
443 time_real [0] = tv [0];
444 time_real [1] = tv [1] * 1000;
445#endif
446}
447
448ecb_inline void
449coro_times_add (struct coro *c)
450{
451 c->t_real [1] += time_real [1];
452 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
453 c->t_real [0] += time_real [0];
454
455 c->t_cpu [1] += time_cpu [1];
456 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
457 c->t_cpu [0] += time_cpu [0];
458}
459
460ecb_inline void
461coro_times_sub (struct coro *c)
462{
463 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
464 c->t_real [1] -= time_real [1];
465 c->t_real [0] -= time_real [0];
466
467 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
468 c->t_cpu [1] -= time_cpu [1];
469 c->t_cpu [0] -= time_cpu [0];
470}
471
472/*****************************************************************************/
473/* magic glue */
474
475#define CORO_MAGIC_type_cv 26
476#define CORO_MAGIC_type_state PERL_MAGIC_ext
477
478#define CORO_MAGIC_NN(sv, type) \
479 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
480 ? SvMAGIC (sv) \
481 : mg_find (sv, type))
482
483#define CORO_MAGIC(sv, type) \
484 (ecb_expect_true (SvMAGIC (sv)) \
485 ? CORO_MAGIC_NN (sv, type) \
486 : 0)
487
488#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
489#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
490
491ecb_inline MAGIC *
492SvSTATEhv_p (pTHX_ SV *coro)
493{
494 MAGIC *mg;
495
496 if (ecb_expect_true (
497 SvTYPE (coro) == SVt_PVHV
498 && (mg = CORO_MAGIC_state (coro))
499 && mg->mg_virtual == &coro_state_vtbl
500 ))
501 return mg;
502
503 return 0;
504}
505
506ecb_inline struct coro *
507SvSTATE_ (pTHX_ SV *coro_sv)
508{
509 MAGIC *mg;
510
511 if (SvROK (coro_sv))
512 coro_sv = SvRV (coro_sv);
513
514 mg = SvSTATEhv_p (aTHX_ coro_sv);
515 if (!mg)
516 croak ("Coro::State object required");
517
518 return (struct coro *)mg->mg_ptr;
519}
520
521#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
522
523/* faster than SvSTATE, but expects a coroutine hv */
524#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
525#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
526
527/*****************************************************************************/
528/* padlist management and caching */
529
530ecb_inline PADLIST *
531coro_derive_padlist (pTHX_ CV *cv)
532{
533 PADLIST *padlist = CvPADLIST (cv);
534 PADLIST *newpadlist;
535 PADNAMELIST *padnames;
536 PAD *newpad;
537 PADOFFSET off = PadlistMAX (padlist) + 1;
538
539#if NEWPADAPI
540
541 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
542 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
543 while (!PadlistARRAY (padlist)[off - 1])
544 --off;
545
546 Perl_pad_push (aTHX_ padlist, off);
547
548 newpad = PadlistARRAY (padlist)[off];
549 PadlistARRAY (padlist)[off] = 0;
550
551#else
552
553#if PERL_VERSION_ATLEAST (5,10,0)
554 Perl_pad_push (aTHX_ padlist, off);
555#else
556 Perl_pad_push (aTHX_ padlist, off, 1);
557#endif
558
559 newpad = PadlistARRAY (padlist)[off];
560 PadlistMAX (padlist) = off - 1;
561
562#endif
563
564 newPADLIST (newpadlist);
565#if !PERL_VERSION_ATLEAST(5,15,3)
566 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
169 AvREAL_off (newpadlist); 567 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 568#endif
171 av_store (newpadlist, 1, (SV *) newpad);
172 569
173 av = newAV (); /* will be @_ */ 570 /* Already extended to 2 elements by newPADLIST. */
174 av_extend (av, 0); 571 PadlistMAX (newpadlist) = 1;
175 av_store (newpad, 0, (SV *) av);
176 AvREIFY_on (av);
177 572
178 for (ix = fpad; ix > 0; ix--) 573 padnames = PadlistNAMES (padlist);
179 { 574 ++PadnamelistREFCNT (padnames);
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 575 PadlistNAMES (newpadlist) = padnames;
181 576
182 if (namesv && namesv != &PL_sv_undef) 577 PadlistARRAY (newpadlist)[1] = newpad;
578
579 return newpadlist;
580}
581
582ecb_inline void
583free_padlist (pTHX_ PADLIST *padlist)
584{
585 /* may be during global destruction */
586 if (!IN_DESTRUCT)
587 {
588 I32 i = PadlistMAX (padlist);
589
590 while (i > 0) /* special-case index 0 */
183 { 591 {
184 char *name = SvPVX (namesv); /* XXX */ 592 /* we try to be extra-careful here */
593 PAD *pad = PadlistARRAY (padlist)[i--];
185 594
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 595 if (pad)
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 } 596 {
190 else 597 I32 j = PadMAX (pad);
191 { /* our own lexical */ 598
192 SV *sv; 599 while (j >= 0)
193 if (*name == '&') 600 SvREFCNT_dec (PadARRAY (pad)[j--]);
601
602 PadMAX (pad) = -1;
194 sv = SvREFCNT_inc (ppad[ix]); 603 SvREFCNT_dec (pad);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 } 604 }
209 } 605 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221 606
222#if 0 /* return -ENOTUNDERSTOOD */ 607 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
223 /* Now that vars are all in place, clone nested closures. */
224 608
225 for (ix = fpad; ix > 0; ix--) { 609#if NEWPADAPI
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 610 Safefree (PadlistARRAY (padlist));
227 if (namesv 611 Safefree (padlist);
228 && namesv != &PL_sv_undef 612#else
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241
242 return newpadlist;
243}
244
245STATIC void
246free_padlist (pTHX_ AV *padlist)
247{
248 /* may be during global destruction */
249 if (SvREFCNT (padlist))
250 {
251 I32 i = AvFILLp (padlist); 613 AvFILLp (padlist) = -1;
252 while (i >= 0) 614 AvREAL_off (padlist);
253 {
254 SV **svp = av_fetch (padlist, i--, FALSE);
255 if (svp)
256 {
257 SV *sv;
258 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
259 SvREFCNT_dec (sv);
260
261 SvREFCNT_dec (*svp);
262 }
263 }
264
265 SvREFCNT_dec ((SV*)padlist); 615 SvREFCNT_dec ((SV*)padlist);
616#endif
266 } 617 }
267} 618}
268 619
269STATIC int 620static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 621coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 622{
272 AV *padlist; 623 PADLIST *padlist;
273 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;
274 626
275 /* casting is fun. */ 627 /* perl manages to free our internal AV and _then_ call us */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 628 if (IN_DESTRUCT)
629 return 0;
630
631 while (len--)
277 free_padlist (aTHX_ padlist); 632 free_padlist (aTHX_ padlists[len]);
278 633
279 SvREFCNT_dec (av); 634 return 0;
280} 635}
281 636
282#define PERL_MAGIC_coro PERL_MAGIC_ext 637static MGVTBL coro_cv_vtbl = {
283 638 0, 0, 0, 0,
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 639 coro_cv_free
640};
285 641
286/* the next two functions merely cache the padlists */ 642/* the next two functions merely cache the padlists */
287STATIC void 643ecb_inline void
288get_padlist (pTHX_ CV *cv) 644get_padlist (pTHX_ CV *cv)
289{ 645{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
647 size_t *lenp;
291 648
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 649 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 650 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
294 else 651 else
652 {
653#if CORO_PREFER_PERL_FUNCTIONS
654 /* this is probably cleaner? but also slower! */
655 /* in practise, it seems to be less stable */
656 CV *cp = Perl_cv_clone (aTHX_ cv);
657 CvPADLIST (cv) = CvPADLIST (cp);
658 CvPADLIST (cp) = 0;
659 SvREFCNT_dec (cp);
660#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 661 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
662#endif
663 }
296} 664}
297 665
298STATIC void 666ecb_inline void
299put_padlist (pTHX_ CV *cv) 667put_padlist (pTHX_ CV *cv)
300{ 668{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 669 MAGIC *mg = CORO_MAGIC_cv (cv);
302 670
303 if (!mg) 671 if (ecb_expect_false (!mg))
304 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV ();
309 } 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);
310 681
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 682 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
312} 683}
313 684
314#define SB do { 685/** load & save, init *******************************************************/
315#define SE } while (0)
316 686
317#define LOAD(state) load_state(aTHX_ (state)); 687ecb_inline void
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 688swap_sv (SV *a, SV *b)
689{
690 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
691 SV tmp;
319 692
320#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);
321 695
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 */
322static 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
323load_state(pTHX_ Coro__State c) 760load_perl (pTHX_ Coro__State c)
324{ 761{
325 PL_dowarn = c->dowarn; 762 perl_slots *slot = c->slot;
326 PL_in_eval = c->in_eval; 763 c->slot = 0;
327 764
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack; 765 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351#if PERL_VERSION < 9
352 PL_retstack = c->retstack;
353 PL_retstack_ix = c->retstack_ix;
354 PL_retstack_max = c->retstack_max;
355#endif
356 PL_curpm = c->curpm;
357 PL_curcop = c->curcop;
358 PL_top_env = c->top_env;
359 766
360 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 767#if CORO_JIT
361 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 768 load_perl_slots (slot);
362 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
363 773
364 { 774 {
365 dSP; 775 dSP;
776
366 CV *cv; 777 CV *cv;
367 778
368 /* now do the ugly restore mess */ 779 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 780 while (ecb_expect_true (cv = (CV *)POPs))
370 { 781 {
371 AV *padlist = (AV *)POPs;
372
373 if (padlist)
374 {
375 put_padlist (aTHX_ cv); /* mark this padlist as available */ 782 put_padlist (aTHX_ cv); /* mark this padlist as available */
376 CvPADLIST(cv) = padlist; 783 CvDEPTH (cv) = PTR2IV (POPs);
377 } 784 CvPADLIST (cv) = (PADLIST *)POPs;
378
379 ++CvDEPTH(cv);
380 } 785 }
381 786
382 PUTBACK; 787 PUTBACK;
383 } 788 }
384}
385 789
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
386static void 820static void
387save_state(pTHX_ Coro__State c, int flags) 821save_perl (pTHX_ Coro__State c)
388{ 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
389 { 852 {
390 dSP; 853 dSP;
391 I32 cxix = cxstack_ix; 854 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 855 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 856 PERL_SI *top_si = PL_curstackinfo;
… …
395 /* 858 /*
396 * 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
397 * (and reinitialize) all cv's in the whole callchain :( 860 * (and reinitialize) all cv's in the whole callchain :(
398 */ 861 */
399 862
400 PUSHs (Nullsv); 863 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 864 /* this loop was inspired by pp_caller */
402 for (;;) 865 for (;;)
403 { 866 {
404 while (cxix >= 0) 867 while (ecb_expect_true (cxix >= 0))
405 { 868 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 869 PERL_CONTEXT *cx = &ccstk[cxix--];
407 870
408 if (CxTYPE(cx) == CXt_SUB) 871 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
409 { 872 {
410 CV *cv = cx->blk_sub.cv; 873 CV *cv = cx->blk_sub.cv;
874
411 if (CvDEPTH(cv)) 875 if (ecb_expect_true (CvDEPTH (cv)))
412 { 876 {
413 EXTEND (SP, CvDEPTH(cv)*2); 877 EXTEND (SP, 3);
414
415 while (--CvDEPTH(cv))
416 {
417 /* this tells the restore code to increment CvDEPTH */
418 PUSHs (Nullsv);
419 PUSHs ((SV *)cv);
420 }
421
422 PUSHs ((SV *)CvPADLIST(cv)); 878 PUSHs ((SV *)CvPADLIST (cv));
879 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
423 PUSHs ((SV *)cv); 880 PUSHs ((SV *)cv);
424 881
882 CvDEPTH (cv) = 0;
425 get_padlist (aTHX_ cv); /* this is a monster */ 883 get_padlist (aTHX_ cv);
426 } 884 }
427 } 885 }
428#ifdef CXt_FORMAT
429 else if (CxTYPE(cx) == CXt_FORMAT)
430 {
431 /* I never used formats, so how should I know how these are implemented? */
432 /* my bold guess is as a simple, plain sub... */
433 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434 }
435#endif
436 } 886 }
437 887
438 if (top_si->si_type == PERLSI_MAIN) 888 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
439 break; 889 break;
440 890
441 top_si = top_si->si_prev; 891 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack; 892 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix; 893 cxix = top_si->si_cxix;
444 } 894 }
445 895
446 PUTBACK; 896 PUTBACK;
447 } 897 }
448 898
449 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 899 /* allocate some space on the context stack for our purposes */
450 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 900 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
451 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 901 {
902 unsigned int i;
452 903
453 c->dowarn = PL_dowarn; 904 for (i = 0; i < SLOT_COUNT; ++i)
454 c->in_eval = PL_in_eval; 905 CXINC;
455 906
456 c->curstackinfo = PL_curstackinfo; 907 cxstack_ix -= SLOT_COUNT; /* undo allocation */
457 c->curstack = PL_curstack; 908 }
909
458 c->mainstack = PL_mainstack; 910 c->mainstack = PL_mainstack;
459 c->stack_sp = PL_stack_sp; 911
460 c->op = PL_op; 912 {
461 c->curpad = PL_curpad; 913 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
462 c->comppad = PL_comppad; 914
463 c->compcv = PL_compcv; 915#if CORO_JIT
464 c->stack_base = PL_stack_base; 916 save_perl_slots (slot);
465 c->stack_max = PL_stack_max; 917#else
466 c->tmps_stack = PL_tmps_stack; 918 #define VARx(name,expr,type) slot->name = expr;
467 c->tmps_floor = PL_tmps_floor; 919 #include "state.h"
468 c->tmps_ix = PL_tmps_ix;
469 c->tmps_max = PL_tmps_max;
470 c->markstack = PL_markstack;
471 c->markstack_ptr = PL_markstack_ptr;
472 c->markstack_max = PL_markstack_max;
473 c->scopestack = PL_scopestack;
474 c->scopestack_ix = PL_scopestack_ix;
475 c->scopestack_max = PL_scopestack_max;
476 c->savestack = PL_savestack;
477 c->savestack_ix = PL_savestack_ix;
478 c->savestack_max = PL_savestack_max;
479#if PERL_VERSION < 9
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483#endif 920#endif
484 c->curpm = PL_curpm; 921 }
485 c->curcop = PL_curcop;
486 c->top_env = PL_top_env;
487} 922}
488 923
489/* 924/*
490 * allocate various perl stacks. This is an exact copy 925 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 926 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 927 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 928 * not usually need a lot of stackspace.
494 */ 929 */
495STATIC void 930#if CORO_PREFER_PERL_FUNCTIONS
931# define coro_init_stacks(thx) init_stacks ()
932#else
933static void
496coro_init_stacks (pTHX) 934coro_init_stacks (pTHX)
497{ 935{
498 LOCK; 936 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
499
500 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501 PL_curstackinfo->si_type = PERLSI_MAIN; 937 PL_curstackinfo->si_type = PERLSI_MAIN;
502 PL_curstack = PL_curstackinfo->si_stack; 938 PL_curstack = PL_curstackinfo->si_stack;
503 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 939 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504 940
505 PL_stack_base = AvARRAY(PL_curstack); 941 PL_stack_base = AvARRAY(PL_curstack);
506 PL_stack_sp = PL_stack_base; 942 PL_stack_sp = PL_stack_base;
507 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 943 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508 944
509 New(50,PL_tmps_stack,96,SV*); 945 New(50,PL_tmps_stack,32,SV*);
510 PL_tmps_floor = -1; 946 PL_tmps_floor = -1;
511 PL_tmps_ix = -1; 947 PL_tmps_ix = -1;
512 PL_tmps_max = 96; 948 PL_tmps_max = 32;
513 949
514 New(54,PL_markstack,16,I32); 950 New(54,PL_markstack,16,I32);
515 PL_markstack_ptr = PL_markstack; 951 PL_markstack_ptr = PL_markstack;
516 PL_markstack_max = PL_markstack + 16; 952 PL_markstack_max = PL_markstack + 16;
517 953
518#ifdef SET_MARK_OFFSET 954#ifdef SET_MARK_OFFSET
519 SET_MARK_OFFSET; 955 SET_MARK_OFFSET;
520#endif 956#endif
521 957
522 New(54,PL_scopestack,16,I32); 958 New(54,PL_scopestack,8,I32);
523 PL_scopestack_ix = 0; 959 PL_scopestack_ix = 0;
524 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
525 964
526 New(54,PL_savestack,96,ANY); 965 New(54,PL_savestack,24,ANY);
527 PL_savestack_ix = 0; 966 PL_savestack_ix = 0;
528 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
529 973
530#if PERL_VERSION < 9 974#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 975 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 976 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 977 PL_retstack_max = 4;
534#endif 978#endif
535
536 UNLOCK;
537} 979}
980#endif
538 981
539/* 982/*
540 * destroy the stacks, the callchain etc... 983 * destroy the stacks, the callchain etc...
541 */ 984 */
542STATIC void 985static void
543destroy_stacks(pTHX) 986coro_destruct_stacks (pTHX)
544{ 987{
545 if (!IN_DESTRUCT)
546 {
547 /* is this ugly, I ask? */
548 LEAVE_SCOPE (0);
549
550 /* sure it is, but more important: is it correct?? :/ */
551 FREETMPS;
552
553 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
554 }
555
556 while (PL_curstackinfo->si_next) 988 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 989 PL_curstackinfo = PL_curstackinfo->si_next;
558 990
559 while (PL_curstackinfo) 991 while (PL_curstackinfo)
560 { 992 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 993 PERL_SI *p = PL_curstackinfo->si_prev;
562 994
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 995 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 996 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 997
575 Safefree (PL_curstackinfo->si_cxstack); 998 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 999 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 1000 PL_curstackinfo = p;
578 } 1001 }
579 1002
580 Safefree (PL_tmps_stack); 1003 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 1004 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 1005 Safefree (PL_scopestack);
1006#if HAS_SCOPESTACK_NAME
1007 Safefree (PL_scopestack_name);
1008#endif
583 Safefree (PL_savestack); 1009 Safefree (PL_savestack);
584#if PERL_VERSION < 9 1010#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 1011 Safefree (PL_retstack);
586#endif 1012#endif
587} 1013}
588 1014
589static void 1015#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 1016 rss += sizeof (SYM (curstackinfo)); \
591{ 1017 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 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);
593 1023
594 New (0, stack, 1, coro_stack); 1024static size_t
1025coro_rss (pTHX_ struct coro *coro)
1026{
1027 size_t rss = sizeof (*coro);
595 1028
596 stack->refcnt = 1; 1029 if (coro->mainstack)
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 { 1030 {
602#if HAVE_MMAP 1031 if (coro->flags & CF_RUNNING)
603 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 if (stack->sptr == (void *)-1)
606#endif
607 { 1032 {
608 /*FIXME*//*D*//* reasonable stack size! */ 1033 #define SYM(sym) PL_ ## sym
609 stack->ssize = - (STACKSIZE * sizeof (long)); 1034 CORO_RSS;
610 New (0, stack->sptr, STACKSIZE, long); 1035 #undef SYM
611 } 1036 }
612 }
613 else 1037 else
614 stack->sptr = 0;
615
616 ctx->stack = stack;
617}
618
619static void
620deallocate_stack (Coro__State ctx)
621{
622 coro_stack *stack = ctx->stack;
623
624 ctx->stack = 0;
625
626 if (stack)
627 {
628 if (!--stack->refcnt)
629 { 1038 {
630#ifdef HAVE_MMAP 1039 #define SYM(sym) coro->slot->sym
631 if (stack->ssize > 0 && stack->sptr) 1040 CORO_RSS;
632 munmap (stack->sptr, stack->ssize); 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));
633 else 1087 else
634#endif 1088 ssv = *svp;
635 Safefree (stack->sptr);
636 1089
637 Safefree (stack); 1090 sv_setsv (sv, ssv);
1091 return 0;
638 } 1092 }
639 else if (ctx->gencnt == stack->gencnt) 1093 }
640 --stack->usecnt; 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 == '_')
641 } 1104 {
642} 1105 SV **svp = 0;
643 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
644static void 1153static int
645setup_coro (void *arg) 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)
646{ 1169{
647 /* 1170 /*
648 * emulate part of the perl startup here. 1171 * emulate part of the perl startup here.
649 */ 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 * If perl-run returns we assume exit() was being called or the coro
1549 * fell off the end, which seems to be the only valid (non-bug)
1550 * reason for perl_run to return. We try to mimic whatever perl is normally
1551 * doing in that case. YMMV.
1552 */
1553 perlish_exit (aTHX);
1554 }
1555}
1556
1557static coro_cctx *
1558cctx_new (void)
1559{
1560 coro_cctx *cctx;
1561
1562 ++cctx_count;
1563 New (0, cctx, 1, coro_cctx);
1564
1565 cctx->gen = cctx_gen;
1566 cctx->flags = 0;
1567 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1568
1569 return cctx;
1570}
1571
1572/* create a new cctx only suitable as source */
1573static coro_cctx *
1574cctx_new_empty (void)
1575{
1576 coro_cctx *cctx = cctx_new ();
1577
1578 cctx->stack.sptr = 0;
1579 coro_create (&cctx->cctx, 0, 0, 0, 0);
1580
1581 return cctx;
1582}
1583
1584/* create a new cctx suitable as destination/running a perl interpreter */
1585static coro_cctx *
1586cctx_new_run (void)
1587{
1588 coro_cctx *cctx = cctx_new ();
1589
1590 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1591 {
1592 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1593 _exit (EXIT_FAILURE);
1594 }
1595
1596 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1597
1598 return cctx;
1599}
1600
1601static void
1602cctx_destroy (coro_cctx *cctx)
1603{
1604 if (!cctx)
1605 return;
1606
1607 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1608
1609 --cctx_count;
1610 coro_destroy (&cctx->cctx);
1611
1612 coro_stack_free (&cctx->stack);
1613
1614 Safefree (cctx);
1615}
1616
1617/* wether this cctx should be destructed */
1618#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1619
1620static coro_cctx *
1621cctx_get (pTHX)
1622{
1623 while (ecb_expect_true (cctx_first))
1624 {
1625 coro_cctx *cctx = cctx_first;
1626 cctx_first = cctx->next;
1627 --cctx_idle;
1628
1629 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1630 return cctx;
1631
1632 cctx_destroy (cctx);
1633 }
1634
1635 return cctx_new_run ();
1636}
1637
1638static void
1639cctx_put (coro_cctx *cctx)
1640{
1641 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1642
1643 /* free another cctx if overlimit */
1644 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1645 {
1646 coro_cctx *first = cctx_first;
1647 cctx_first = first->next;
1648 --cctx_idle;
1649
1650 cctx_destroy (first);
1651 }
1652
1653 ++cctx_idle;
1654 cctx->next = cctx_first;
1655 cctx_first = cctx;
1656}
1657
1658/** coroutine switching *****************************************************/
1659
1660static void
1661transfer_check (pTHX_ struct coro *prev, struct coro *next)
1662{
1663 /* TODO: throwing up here is considered harmful */
1664
1665 if (ecb_expect_true (prev != next))
1666 {
1667 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1668 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1669
1670 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1671 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1672
1673#if !PERL_VERSION_ATLEAST (5,10,0)
1674 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1675 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1676#endif
1677 }
1678}
1679
1680/* always use the TRANSFER macro */
1681static void ecb_noinline /* noinline so we have a fixed stackframe */
1682transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1683{
1684 dSTACKLEVEL;
1685
1686 /* sometimes transfer is only called to set idle_sp */
1687 if (ecb_expect_false (!prev))
1688 {
1689 cctx_current->idle_sp = STACKLEVEL;
1690 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1691 }
1692 else if (ecb_expect_true (prev != next))
1693 {
1694 coro_cctx *cctx_prev;
1695
1696 if (ecb_expect_false (prev->flags & CF_NEW))
1697 {
1698 /* create a new empty/source context */
1699 prev->flags &= ~CF_NEW;
1700 prev->flags |= CF_RUNNING;
1701 }
1702
1703 prev->flags &= ~CF_RUNNING;
1704 next->flags |= CF_RUNNING;
1705
1706 /* first get rid of the old state */
1707 save_perl (aTHX_ prev);
1708
1709 if (ecb_expect_false (next->flags & CF_NEW))
1710 {
1711 /* need to start coroutine */
1712 next->flags &= ~CF_NEW;
1713 /* setup coroutine call */
1714 init_perl (aTHX_ next);
1715 }
1716 else
1717 load_perl (aTHX_ next);
1718
1719 /* possibly untie and reuse the cctx */
1720 if (ecb_expect_true (
1721 cctx_current->idle_sp == STACKLEVEL
1722 && !(cctx_current->flags & CC_TRACE)
1723 && !force_cctx
1724 ))
1725 {
1726 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1727 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1728
1729 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1730 /* without this the next cctx_get might destroy the running cctx while still in use */
1731 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1732 if (ecb_expect_true (!next->cctx))
1733 next->cctx = cctx_get (aTHX);
1734
1735 cctx_put (cctx_current);
1736 }
1737 else
1738 prev->cctx = cctx_current;
1739
1740 ++next->usecount;
1741
1742 cctx_prev = cctx_current;
1743 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1744
1745 next->cctx = 0;
1746
1747 if (ecb_expect_false (cctx_prev != cctx_current))
1748 {
1749 cctx_prev->top_env = PL_top_env;
1750 PL_top_env = cctx_current->top_env;
1751 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1752 }
1753
1754 transfer_tail (aTHX);
1755 }
1756}
1757
1758#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1759#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1760
1761/** high level stuff ********************************************************/
1762
1763/* this function is actually Coro, not Coro::State, but we call it from here */
1764/* because it is convenient - but it hasn't been declared yet for that reason */
1765static void
1766coro_call_on_destroy (pTHX_ struct coro *coro);
1767
1768static void
1769coro_state_destroy (pTHX_ struct coro *coro)
1770{
1771 if (coro->flags & CF_ZOMBIE)
1772 return;
1773
1774 slf_destroy (aTHX_ coro);
1775
1776 coro->flags |= CF_ZOMBIE;
1777
1778 if (coro->flags & CF_READY)
1779 {
1780 /* reduce nready, as destroying a ready coro effectively unreadies it */
1781 /* alternative: look through all ready queues and remove the coro */
1782 --coro_nready;
1783 }
1784 else
1785 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1786
1787 if (coro->next) coro->next->prev = coro->prev;
1788 if (coro->prev) coro->prev->next = coro->next;
1789 if (coro == coro_first) coro_first = coro->next;
1790
1791 if (coro->mainstack
1792 && coro->mainstack != main_mainstack
1793 && coro->slot
1794 && !PL_dirty)
1795 destroy_perl (aTHX_ coro);
1796
1797 cctx_destroy (coro->cctx);
1798 SvREFCNT_dec (coro->startcv);
1799 SvREFCNT_dec (coro->args);
1800 SvREFCNT_dec (coro->swap_sv);
1801 SvREFCNT_dec (CORO_THROW);
1802
1803 coro_call_on_destroy (aTHX_ coro);
1804
1805 /* more destruction mayhem in coro_state_free */
1806}
1807
1808static int
1809coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1810{
1811 struct coro *coro = (struct coro *)mg->mg_ptr;
1812 mg->mg_ptr = 0;
1813
1814 coro_state_destroy (aTHX_ coro);
1815 SvREFCNT_dec (coro->on_destroy);
1816 SvREFCNT_dec (coro->status);
1817
1818 Safefree (coro);
1819
1820 return 0;
1821}
1822
1823static int ecb_cold
1824coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1825{
1826 /* called when perl clones the current process the slow way (windows process emulation) */
1827 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1828 mg->mg_ptr = 0;
1829 mg->mg_virtual = 0;
1830
1831 return 0;
1832}
1833
1834static MGVTBL coro_state_vtbl = {
1835 0, 0, 0, 0,
1836 coro_state_free,
1837 0,
1838#ifdef MGf_DUP
1839 coro_state_dup,
1840#else
1841# define MGf_DUP 0
1842#endif
1843};
1844
1845static void
1846prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1847{
1848 ta->prev = SvSTATE (prev_sv);
1849 ta->next = SvSTATE (next_sv);
1850 TRANSFER_CHECK (*ta);
1851}
1852
1853static void
1854api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1855{
1856 struct coro_transfer_args ta;
1857
1858 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1859 TRANSFER (ta, 1);
1860}
1861
1862/** Coro ********************************************************************/
1863
1864ecb_inline void
1865coro_enq (pTHX_ struct coro *coro)
1866{
1867 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1868
1869 SvREFCNT_inc_NN (coro->hv);
1870
1871 coro->next_ready = 0;
1872 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1873 ready [1] = coro;
1874}
1875
1876ecb_inline struct coro *
1877coro_deq (pTHX)
1878{
1879 int prio;
1880
1881 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1882 {
1883 struct coro **ready = coro_ready [prio];
1884
1885 if (ready [0])
1886 {
1887 struct coro *coro = ready [0];
1888 ready [0] = coro->next_ready;
1889 return coro;
1890 }
1891 }
1892
1893 return 0;
1894}
1895
1896static void
1897invoke_sv_ready_hook_helper (void)
1898{
650 dTHX; 1899 dTHX;
651 dSP; 1900 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1901
655 coro_init_stacks (aTHX); 1902 ENTER;
656 /*PL_curcop = 0;*/ 1903 SAVETMPS;
657 /*PL_in_eval = PL_in_eval;*/ /* inherit */
658 SvREFCNT_dec (GvAV (PL_defgv));
659 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660 1904
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1905 PUSHMARK (SP);
668 PUTBACK; 1906 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1907 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1908
671 if (SvTRUE (ERRSV)) 1909 FREETMPS;
672 croak (NULL); 1910 LEAVE;
673 else 1911}
674 croak ("FATAL: CCTXT coroutine returned!"); 1912
1913static int
1914api_ready (pTHX_ SV *coro_sv)
1915{
1916 struct coro *coro = SvSTATE (coro_sv);
1917
1918 if (coro->flags & CF_READY)
1919 return 0;
1920
1921 coro->flags |= CF_READY;
1922
1923 coro_enq (aTHX_ coro);
1924
1925 if (!coro_nready++)
1926 if (coroapi.readyhook)
1927 coroapi.readyhook ();
1928
1929 return 1;
1930}
1931
1932static int
1933api_is_ready (pTHX_ SV *coro_sv)
1934{
1935 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1936}
1937
1938/* expects to own a reference to next->hv */
1939ecb_inline void
1940prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1941{
1942 SV *prev_sv = SvRV (coro_current);
1943
1944 ta->prev = SvSTATE_hv (prev_sv);
1945 ta->next = next;
1946
1947 TRANSFER_CHECK (*ta);
1948
1949 SvRV_set (coro_current, (SV *)next->hv);
1950
1951 free_coro_mortal (aTHX);
1952 coro_mortal = prev_sv;
1953}
1954
1955static void
1956prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1957{
1958 for (;;)
675 } 1959 {
676 else 1960 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1961
680 PL_op = (OP *)&myop; 1962 if (ecb_expect_true (next))
681
682 Zero(&myop, 1, UNOP);
683 myop.op_next = Nullop;
684 myop.op_flags = OPf_WANT_VOID;
685
686 PUSHMARK(SP);
687 XPUSHs (sub_init);
688 /*
689 * the next line is slightly wrong, as PL_op->op_next
690 * is actually being executed so we skip the first op.
691 * that doesn't matter, though, since it is only
692 * pp_nextstate and we never return...
693 * ah yes, and I don't care anyways ;)
694 */
695 PUTBACK;
696 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697 SPAGAIN;
698
699 ENTER; /* necessary e.g. for dounwind */
700 }
701}
702
703static void
704continue_coro (void *arg)
705{
706 /*
707 * this is a _very_ stripped down perl interpreter ;)
708 */
709 dTHX;
710 Coro__State ctx = (Coro__State)arg;
711 JMPENV coro_start_env;
712
713 PL_top_env = &ctx->start_env;
714
715 ctx->cursp = 0;
716 PL_op = PL_op->op_next;
717 CALLRUNOPS(aTHX);
718
719 abort ();
720}
721
722STATIC void
723transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724{
725 dSTACKLEVEL;
726
727 if (prev != next)
728 {
729 if (next->mainstack)
730 { 1963 {
731 LOCK; 1964 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1965 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
733 LOAD (next); 1966 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1967 else
735
736 /* mark this state as in-use */
737 next->mainstack = 0;
738 next->tmps_ix = -2;
739
740 /* stacklevel changed? if yes, grab the stack for us! */
741 if (flags & TRANSFER_SAVE_CCTXT)
742 { 1968 {
743 if (!prev->stack) 1969 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 1970 --coro_nready;
745 else if (prev->cursp != stacklevel 1971
746 && prev->stack->usecnt > 1) 1972 prepare_schedule_to (aTHX_ ta, next);
747 { 1973 break;
748 prev->gencnt = ++prev->stack->gencnt;
749 prev->stack->usecnt = 1;
750 }
751
752 /* has our stack been invalidated? */
753 if (next->stack && next->stack->gencnt != next->gencnt)
754 {
755 deallocate_stack (next);
756 allocate_stack (next, 1);
757 coro_create (&(next->stack->cctx),
758 continue_coro, (void *)next,
759 next->stack->sptr, labs (next->stack->ssize));
760 }
761
762 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763 prev->cursp = stacklevel;
764 /* don't add any code here */
765 } 1974 }
766 else
767 next->cursp = stacklevel;
768 } 1975 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 1976 else
772 { 1977 {
773 LOCK; 1978 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 1979 if (SvROK (sv_idle)
775 UNLOCK; 1980 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 1981 {
779 if (!prev->stack) 1982 if (SvRV (sv_idle) == SvRV (coro_current))
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 { 1983 {
784 PL_top_env = &next->start_env; 1984 require_pv ("Carp");
785 1985
786 setup_coro (next); 1986 {
787 next->cursp = stacklevel; 1987 dSP;
788 1988
789 prev->stack->refcnt++; 1989 ENTER;
790 prev->stack->usecnt++; 1990 SAVETMPS;
791 next->stack = prev->stack; 1991
792 next->gencnt = prev->gencnt; 1992 PUSHMARK (SP);
1993 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1994 PUTBACK;
1995 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1996
1997 FREETMPS;
1998 LEAVE;
1999 }
793 } 2000 }
794 else 2001
795 { 2002 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
796 assert (!next->stack); 2003 api_ready (aTHX_ SvRV (sv_idle));
797 allocate_stack (next, 1); 2004 --coro_nready;
798 coro_create (&(next->stack->cctx),
799 setup_coro, (void *)next,
800 next->stack->sptr, labs (next->stack->ssize));
801 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802 prev->cursp = stacklevel;
803 /* don't add any code here */
804 }
805 } 2005 }
806 else 2006 else
807 { 2007 {
808 setup_coro (next); 2008 /* TODO: deprecated, remove, cannot work reliably *//*D*/
809 next->cursp = stacklevel; 2009 dSP;
2010
2011 ENTER;
2012 SAVETMPS;
2013
2014 PUSHMARK (SP);
2015 PUTBACK;
2016 call_sv (sv_idle, G_VOID | G_DISCARD);
2017
2018 FREETMPS;
2019 LEAVE;
810 } 2020 }
811 } 2021 }
812 } 2022 }
2023}
813 2024
814 LOCK; 2025ecb_inline void
2026prepare_cede (pTHX_ struct coro_transfer_args *ta)
2027{
2028 api_ready (aTHX_ coro_current);
2029 prepare_schedule (aTHX_ ta);
2030}
2031
2032ecb_inline void
2033prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2034{
2035 SV *prev = SvRV (coro_current);
2036
815 if (coro_mortal) 2037 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 2038 {
820 UNLOCK; 2039 prepare_schedule (aTHX_ ta);
2040 api_ready (aTHX_ prev);
2041 }
2042 else
2043 prepare_nop (aTHX_ ta);
821} 2044}
822 2045
823#define SV_CORO(sv,func) \ 2046static void
824 do { \ 2047api_schedule (pTHX)
825 if (SvROK (sv)) \ 2048{
826 sv = SvRV (sv); \ 2049 struct coro_transfer_args ta;
827 \
828 if (SvTYPE (sv) == SVt_PVHV) \
829 { \
830 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831 \
832 if (!he) \
833 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834 \
835 (sv) = SvRV (HeVAL(he)); \
836 } \
837 \
838 /* must also be changed inside Coro::Cont::yield */ \
839 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841 \
842 } while(0)
843 2050
844#define SvSTATE(sv) (struct coro *)SvIV (sv) 2051 prepare_schedule (aTHX_ &ta);
2052 TRANSFER (ta, 1);
2053}
845 2054
2055static void
2056api_schedule_to (pTHX_ SV *coro_sv)
2057{
2058 struct coro_transfer_args ta;
2059 struct coro *next = SvSTATE (coro_sv);
2060
2061 SvREFCNT_inc_NN (coro_sv);
2062 prepare_schedule_to (aTHX_ &ta, next);
2063}
2064
846static void 2065static int
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 2066api_cede (pTHX)
848{ 2067{
849 SV_CORO (prev, "Coro::transfer"); 2068 struct coro_transfer_args ta;
850 SV_CORO (next, "Coro::transfer");
851 2069
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2070 prepare_cede (aTHX_ &ta);
853}
854 2071
2072 if (ecb_expect_true (ta.prev != ta.next))
2073 {
2074 TRANSFER (ta, 1);
2075 return 1;
2076 }
2077 else
2078 return 0;
2079}
2080
2081static int
2082api_cede_notself (pTHX)
2083{
2084 if (coro_nready)
2085 {
2086 struct coro_transfer_args ta;
2087
2088 prepare_cede_notself (aTHX_ &ta);
2089 TRANSFER (ta, 1);
2090 return 1;
2091 }
2092 else
2093 return 0;
2094}
2095
2096static void
2097api_trace (pTHX_ SV *coro_sv, int flags)
2098{
2099 struct coro *coro = SvSTATE (coro_sv);
2100
2101 if (coro->flags & CF_RUNNING)
2102 croak ("cannot enable tracing on a running coroutine, caught");
2103
2104 if (flags & CC_TRACE)
2105 {
2106 if (!coro->cctx)
2107 coro->cctx = cctx_new_run ();
2108 else if (!(coro->cctx->flags & CC_TRACE))
2109 croak ("cannot enable tracing on coroutine with custom stack, caught");
2110
2111 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2112 }
2113 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2114 {
2115 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2116
2117 if (coro->flags & CF_RUNNING)
2118 PL_runops = RUNOPS_DEFAULT;
2119 else
2120 coro->slot->runops = RUNOPS_DEFAULT;
2121 }
2122}
2123
2124static void
2125coro_push_av (pTHX_ AV *av, I32 gimme_v)
2126{
2127 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2128 {
2129 dSP;
2130
2131 if (gimme_v == G_SCALAR)
2132 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2133 else
2134 {
2135 int i;
2136 EXTEND (SP, AvFILLp (av) + 1);
2137
2138 for (i = 0; i <= AvFILLp (av); ++i)
2139 PUSHs (AvARRAY (av)[i]);
2140 }
2141
2142 PUTBACK;
2143 }
2144}
2145
2146static void
2147coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2148{
2149 if (!coro->on_destroy)
2150 coro->on_destroy = newAV ();
2151
2152 av_push (coro->on_destroy, cb);
2153}
2154
2155static void
2156slf_destroy_join (pTHX_ struct CoroSLF *frame)
2157{
2158 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2159}
2160
2161static int
2162slf_check_join (pTHX_ struct CoroSLF *frame)
2163{
2164 struct coro *coro = (struct coro *)frame->data;
2165
2166 if (!coro->status)
2167 return 1;
2168
2169 frame->destroy = 0;
2170
2171 coro_push_av (aTHX_ coro->status, GIMME_V);
2172
2173 SvREFCNT_dec ((SV *)coro->hv);
2174
2175 return 0;
2176}
2177
2178static void
2179slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2182
2183 if (items > 1)
2184 croak ("join called with too many arguments");
2185
2186 if (coro->status)
2187 frame->prepare = prepare_nop;
2188 else
2189 {
2190 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2191 frame->prepare = prepare_schedule;
2192 }
2193
2194 frame->check = slf_check_join;
2195 frame->destroy = slf_destroy_join;
2196 frame->data = (void *)coro;
2197 SvREFCNT_inc (coro->hv);
2198}
2199
2200static void
2201coro_call_on_destroy (pTHX_ struct coro *coro)
2202{
2203 AV *od = coro->on_destroy;
2204
2205 if (!od)
2206 return;
2207
2208 coro->on_destroy = 0;
2209 sv_2mortal ((SV *)od);
2210
2211 while (AvFILLp (od) >= 0)
2212 {
2213 SV *cb = sv_2mortal (av_pop (od));
2214
2215 /* coro hv's (and only hv's at the moment) are supported as well */
2216 if (SvSTATEhv_p (aTHX_ cb))
2217 api_ready (aTHX_ cb);
2218 else
2219 {
2220 dSP; /* don't disturb outer sp */
2221 PUSHMARK (SP);
2222
2223 if (coro->status)
2224 {
2225 PUTBACK;
2226 coro_push_av (aTHX_ coro->status, G_ARRAY);
2227 SPAGAIN;
2228 }
2229
2230 PUTBACK;
2231 call_sv (cb, G_VOID | G_DISCARD);
2232 }
2233 }
2234}
2235
2236static void
2237coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2238{
2239 AV *av;
2240
2241 if (coro->status)
2242 {
2243 av = coro->status;
2244 av_clear (av);
2245 }
2246 else
2247 av = coro->status = newAV ();
2248
2249 /* items are actually not so common, so optimise for this case */
2250 if (items)
2251 {
2252 int i;
2253
2254 av_extend (av, items - 1);
2255
2256 for (i = 0; i < items; ++i)
2257 av_push (av, SvREFCNT_inc_NN (arg [i]));
2258 }
2259}
2260
2261static void
2262slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2263{
2264 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2265 api_ready (aTHX_ sv_manager);
2266
2267 frame->prepare = prepare_schedule;
2268 frame->check = slf_check_repeat;
2269
2270 /* as a minor optimisation, we could unwind all stacks here */
2271 /* but that puts extra pressure on pp_slf, and is not worth much */
2272 /*coro_unwind_stacks (aTHX);*/
2273}
2274
2275static void
2276slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2277{
2278 HV *coro_hv = (HV *)SvRV (coro_current);
2279
2280 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2281 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2282}
2283
2284static void
2285slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2286{
2287 HV *coro_hv;
2288 struct coro *coro;
2289
2290 if (items <= 0)
2291 croak ("Coro::cancel called without coro object,");
2292
2293 coro = SvSTATE (arg [0]);
2294 coro_hv = coro->hv;
2295
2296 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2297
2298 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2299 {
2300 /* coro currently busy cancelling something, so just notify it */
2301 coro->slf_frame.data = (void *)coro;
2302
2303 frame->prepare = prepare_nop;
2304 frame->check = slf_check_nop;
2305 }
2306 else if (coro_hv == (HV *)SvRV (coro_current))
2307 {
2308 /* cancelling the current coro is allowed, and equals terminate */
2309 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2310 }
2311 else
2312 {
2313 struct coro *self = SvSTATE_current;
2314
2315 if (!self)
2316 croak ("Coro::cancel called outside of thread content,");
2317
2318 /* otherwise we cancel directly, purely for speed reasons
2319 * unfortunately, this requires some magic trickery, as
2320 * somebody else could cancel us, so we have to fight the cancellation.
2321 * this is ugly, and hopefully fully worth the extra speed.
2322 * besides, I can't get the slow-but-safe version working...
2323 */
2324 slf_frame.data = 0;
2325 self->flags |= CF_NOCANCEL;
2326 coro_state_destroy (aTHX_ coro);
2327 self->flags &= ~CF_NOCANCEL;
2328
2329 if (slf_frame.data)
2330 {
2331 /* while we were busy we have been cancelled, so terminate */
2332 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2333 }
2334 else
2335 {
2336 frame->prepare = prepare_nop;
2337 frame->check = slf_check_nop;
2338 }
2339 }
2340}
2341
2342static int
2343slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2344{
2345 frame->prepare = 0;
2346 coro_unwind_stacks (aTHX);
2347
2348 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2349
2350 return 1;
2351}
2352
2353static int
2354safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2355{
2356 if (coro->cctx)
2357 croak ("coro inside C callback, unable to cancel at this time, caught");
2358
2359 if (coro->flags & CF_NEW)
2360 {
2361 coro_set_status (aTHX_ coro, arg, items);
2362 coro_state_destroy (aTHX_ coro);
2363 }
2364 else
2365 {
2366 if (!coro->slf_frame.prepare)
2367 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2368
2369 slf_destroy (aTHX_ coro);
2370
2371 coro_set_status (aTHX_ coro, arg, items);
2372 coro->slf_frame.prepare = prepare_nop;
2373 coro->slf_frame.check = slf_check_safe_cancel;
2374
2375 api_ready (aTHX_ (SV *)coro->hv);
2376 }
2377
2378 return 1;
2379}
2380
855/** Coro ********************************************************************/ 2381/*****************************************************************************/
2382/* async pool handler */
856 2383
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 2384static int
870coro_enq (pTHX_ SV *sv) 2385slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2386{
2387 HV *hv = (HV *)SvRV (coro_current);
2388 struct coro *coro = (struct coro *)frame->data;
2389
2390 if (!coro->invoke_cb)
2391 return 1; /* loop till we have invoke */
2392 else
2393 {
2394 hv_store (hv, "desc", sizeof ("desc") - 1,
2395 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2396
2397 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2398
2399 {
2400 dSP;
2401 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2402 PUTBACK;
2403 }
2404
2405 SvREFCNT_dec (GvAV (PL_defgv));
2406 GvAV (PL_defgv) = coro->invoke_av;
2407 coro->invoke_av = 0;
2408
2409 return 0;
2410 }
2411}
2412
2413static void
2414slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 HV *hv = (HV *)SvRV (coro_current);
2417 struct coro *coro = SvSTATE_hv ((SV *)hv);
2418
2419 if (ecb_expect_true (coro->saved_deffh))
2420 {
2421 /* subsequent iteration */
2422 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2423 coro->saved_deffh = 0;
2424
2425 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2426 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2427 {
2428 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2429 return;
2430 }
2431 else
2432 {
2433 av_clear (GvAV (PL_defgv));
2434 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2435
2436 if (ecb_expect_false (coro->swap_sv))
2437 {
2438 swap_svs_leave (coro);
2439 SvREFCNT_dec_NN (coro->swap_sv);
2440 coro->swap_sv = 0;
2441 }
2442
2443 coro->prio = 0;
2444
2445 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2446 api_trace (aTHX_ coro_current, 0);
2447
2448 frame->prepare = prepare_schedule;
2449 av_push (av_async_pool, SvREFCNT_inc (hv));
2450 }
2451 }
2452 else
2453 {
2454 /* first iteration, simply fall through */
2455 frame->prepare = prepare_nop;
2456 }
2457
2458 frame->check = slf_check_pool_handler;
2459 frame->data = (void *)coro;
2460}
2461
2462/*****************************************************************************/
2463/* rouse callback */
2464
2465#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2466
2467static void
2468coro_rouse_callback (pTHX_ CV *cv)
2469{
2470 dXSARGS;
2471 SV *data = (SV *)S_GENSUB_ARG;
2472
872 if (SvTYPE (sv) != SVt_PVHV) 2473 if (SvTYPE (SvRV (data)) != SVt_PVAV)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2474 {
2475 /* first call, set args */
2476 SV *coro = SvRV (data);
2477 AV *av = newAV ();
874 2478
875 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2479 SvRV_set (data, (SV *)av);
876 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
877 2480
878 prio = prio > PRIO_MAX ? PRIO_MAX 2481 /* better take a full copy of the arguments */
879 : prio < PRIO_MIN ? PRIO_MIN 2482 while (items--)
880 : prio; 2483 av_store (av, items, newSVsv (ST (items)));
881 2484
882 av_push (coro_ready [prio - PRIO_MIN], sv); 2485 api_ready (aTHX_ coro);
883 coro_nready++; 2486 SvREFCNT_dec (coro);
2487 }
2488
2489 XSRETURN_EMPTY;
2490}
2491
2492static int
2493slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2494{
2495 SV *data = (SV *)frame->data;
2496
2497 if (CORO_THROW)
2498 return 0;
2499
2500 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2501 return 1;
2502
2503 /* now push all results on the stack */
2504 {
2505 dSP;
2506 AV *av = (AV *)SvRV (data);
2507 int i;
2508
2509 EXTEND (SP, AvFILLp (av) + 1);
2510 for (i = 0; i <= AvFILLp (av); ++i)
2511 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2512
2513 /* we have stolen the elements, so set length to zero and free */
2514 AvFILLp (av) = -1;
2515 av_undef (av);
2516
2517 PUTBACK;
2518 }
2519
2520 return 0;
2521}
2522
2523static void
2524slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 SV *cb;
2527
2528 if (items)
2529 cb = arg [0];
2530 else
2531 {
2532 struct coro *coro = SvSTATE_current;
2533
2534 if (!coro->rouse_cb)
2535 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2536
2537 cb = sv_2mortal (coro->rouse_cb);
2538 coro->rouse_cb = 0;
2539 }
2540
2541 if (!SvROK (cb)
2542 || SvTYPE (SvRV (cb)) != SVt_PVCV
2543 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2544 croak ("Coro::rouse_wait called with illegal callback argument,");
2545
2546 {
2547 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2548 SV *data = (SV *)S_GENSUB_ARG;
2549
2550 frame->data = (void *)data;
2551 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2552 frame->check = slf_check_rouse_wait;
2553 }
884} 2554}
885 2555
886static SV * 2556static SV *
887coro_deq (pTHX_ int min_prio) 2557coro_new_rouse_cb (pTHX)
888{ 2558{
889 int prio = PRIO_MAX - PRIO_MIN; 2559 HV *hv = (HV *)SvRV (coro_current);
2560 struct coro *coro = SvSTATE_hv (hv);
2561 SV *data = newRV_inc ((SV *)hv);
2562 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
890 2563
891 min_prio -= PRIO_MIN; 2564 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
892 if (min_prio < 0) 2565 SvREFCNT_dec (data); /* magicext increases the refcount */
893 min_prio = 0;
894 2566
895 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2567 SvREFCNT_dec (coro->rouse_cb);
896 if (av_len (coro_ready[prio]) >= 0) 2568 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2569
2570 return cb;
2571}
2572
2573/*****************************************************************************/
2574/* schedule-like-function opcode (SLF) */
2575
2576static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2577static const CV *slf_cv;
2578static SV **slf_argv;
2579static int slf_argc, slf_arga; /* count, allocated */
2580static I32 slf_ax; /* top of stack, for restore */
2581
2582/* this restores the stack in the case we patched the entersub, to */
2583/* recreate the stack frame as perl will on following calls */
2584/* since entersub cleared the stack */
2585static OP *
2586pp_restore (pTHX)
2587{
2588 int i;
2589 SV **SP = PL_stack_base + slf_ax;
2590
2591 PUSHMARK (SP);
2592
2593 EXTEND (SP, slf_argc + 1);
2594
2595 for (i = 0; i < slf_argc; ++i)
2596 PUSHs (sv_2mortal (slf_argv [i]));
2597
2598 PUSHs ((SV *)CvGV (slf_cv));
2599
2600 RETURNOP (slf_restore.op_first);
2601}
2602
2603static void
2604slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2605{
2606 SV **arg = (SV **)slf_frame.data;
2607
2608 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2609}
2610
2611static void
2612slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 if (items != 2)
2615 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2616
2617 frame->prepare = slf_prepare_transfer;
2618 frame->check = slf_check_nop;
2619 frame->data = (void *)arg; /* let's hope it will stay valid */
2620}
2621
2622static void
2623slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2624{
2625 frame->prepare = prepare_schedule;
2626 frame->check = slf_check_nop;
2627}
2628
2629static void
2630slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2631{
2632 struct coro *next = (struct coro *)slf_frame.data;
2633
2634 SvREFCNT_inc_NN (next->hv);
2635 prepare_schedule_to (aTHX_ ta, next);
2636}
2637
2638static void
2639slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 if (!items)
2642 croak ("Coro::schedule_to expects a coroutine argument, caught");
2643
2644 frame->data = (void *)SvSTATE (arg [0]);
2645 frame->prepare = slf_prepare_schedule_to;
2646 frame->check = slf_check_nop;
2647}
2648
2649static void
2650slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2651{
2652 api_ready (aTHX_ SvRV (coro_current));
2653
2654 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2655}
2656
2657static void
2658slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 frame->prepare = prepare_cede;
2661 frame->check = slf_check_nop;
2662}
2663
2664static void
2665slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 frame->prepare = prepare_cede_notself;
2668 frame->check = slf_check_nop;
2669}
2670
2671/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2672static void
2673slf_destroy (pTHX_ struct coro *coro)
2674{
2675 struct CoroSLF frame = coro->slf_frame;
2676
2677 /*
2678 * The on_destroy below most likely is from an SLF call.
2679 * Since by definition the SLF call will not finish when we destroy
2680 * the coro, we will have to force-finish it here, otherwise
2681 * cleanup functions cannot call SLF functions.
2682 */
2683 coro->slf_frame.prepare = 0;
2684
2685 /* this callback is reserved for slf functions needing to do cleanup */
2686 if (frame.destroy && frame.prepare && !PL_dirty)
2687 frame.destroy (aTHX_ &frame);
2688}
2689
2690/*
2691 * these not obviously related functions are all rolled into one
2692 * function to increase chances that they all will call transfer with the same
2693 * stack offset
2694 * SLF stands for "schedule-like-function".
2695 */
2696static OP *
2697pp_slf (pTHX)
2698{
2699 I32 checkmark; /* mark SP to see how many elements check has pushed */
2700
2701 /* set up the slf frame, unless it has already been set-up */
2702 /* the latter happens when a new coro has been started */
2703 /* or when a new cctx was attached to an existing coroutine */
2704 if (ecb_expect_true (!slf_frame.prepare))
2705 {
2706 /* first iteration */
2707 dSP;
2708 SV **arg = PL_stack_base + TOPMARK + 1;
2709 int items = SP - arg; /* args without function object */
2710 SV *gv = *sp;
2711
2712 /* do a quick consistency check on the "function" object, and if it isn't */
2713 /* for us, divert to the real entersub */
2714 if (SvTYPE (gv) != SVt_PVGV
2715 || !GvCV (gv)
2716 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2717 return PL_ppaddr[OP_ENTERSUB](aTHX);
2718
2719 if (!(PL_op->op_flags & OPf_STACKED))
2720 {
2721 /* ampersand-form of call, use @_ instead of stack */
2722 AV *av = GvAV (PL_defgv);
2723 arg = AvARRAY (av);
2724 items = AvFILLp (av) + 1;
2725 }
2726
2727 /* now call the init function, which needs to set up slf_frame */
2728 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2729 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2730
2731 /* pop args */
2732 SP = PL_stack_base + POPMARK;
2733
2734 PUTBACK;
2735 }
2736
2737 /* now that we have a slf_frame, interpret it! */
2738 /* we use a callback system not to make the code needlessly */
2739 /* complicated, but so we can run multiple perl coros from one cctx */
2740
2741 do
2742 {
2743 struct coro_transfer_args ta;
2744
2745 slf_frame.prepare (aTHX_ &ta);
2746 TRANSFER (ta, 0);
2747
2748 checkmark = PL_stack_sp - PL_stack_base;
2749 }
2750 while (slf_frame.check (aTHX_ &slf_frame));
2751
2752 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2753
2754 /* exception handling */
2755 if (ecb_expect_false (CORO_THROW))
2756 {
2757 SV *exception = sv_2mortal (CORO_THROW);
2758
2759 CORO_THROW = 0;
2760 sv_setsv (ERRSV, exception);
2761 croak (0);
2762 }
2763
2764 /* return value handling - mostly like entersub */
2765 /* make sure we put something on the stack in scalar context */
2766 if (GIMME_V == G_SCALAR
2767 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2768 {
2769 dSP;
2770 SV **bot = PL_stack_base + checkmark;
2771
2772 if (sp == bot) /* too few, push undef */
2773 bot [1] = &PL_sv_undef;
2774 else /* too many, take last one */
2775 bot [1] = *sp;
2776
2777 SP = bot + 1;
2778
2779 PUTBACK;
2780 }
2781
2782 return NORMAL;
2783}
2784
2785static void
2786api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2787{
2788 int i;
2789 SV **arg = PL_stack_base + ax;
2790 int items = PL_stack_sp - arg + 1;
2791
2792 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2793
2794 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2795 && PL_op->op_ppaddr != pp_slf)
2796 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2797
2798 CvFLAGS (cv) |= CVf_SLF;
2799 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2800 slf_cv = cv;
2801
2802 /* we patch the op, and then re-run the whole call */
2803 /* we have to put the same argument on the stack for this to work */
2804 /* and this will be done by pp_restore */
2805 slf_restore.op_next = (OP *)&slf_restore;
2806 slf_restore.op_type = OP_CUSTOM;
2807 slf_restore.op_ppaddr = pp_restore;
2808 slf_restore.op_first = PL_op;
2809
2810 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2811
2812 if (PL_op->op_flags & OPf_STACKED)
2813 {
2814 if (items > slf_arga)
2815 {
2816 slf_arga = items;
2817 Safefree (slf_argv);
2818 New (0, slf_argv, slf_arga, SV *);
2819 }
2820
2821 slf_argc = items;
2822
2823 for (i = 0; i < items; ++i)
2824 slf_argv [i] = SvREFCNT_inc (arg [i]);
2825 }
2826 else
2827 slf_argc = 0;
2828
2829 PL_op->op_ppaddr = pp_slf;
2830 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2831
2832 PL_op = (OP *)&slf_restore;
2833}
2834
2835/*****************************************************************************/
2836/* dynamic wind */
2837
2838static void
2839on_enterleave_call (pTHX_ SV *cb)
2840{
2841 dSP;
2842
2843 PUSHSTACK;
2844
2845 PUSHMARK (SP);
2846 PUTBACK;
2847 call_sv (cb, G_VOID | G_DISCARD);
2848 SPAGAIN;
2849
2850 POPSTACK;
2851}
2852
2853static SV *
2854coro_avp_pop_and_free (pTHX_ AV **avp)
2855{
2856 AV *av = *avp;
2857 SV *res = av_pop (av);
2858
2859 if (AvFILLp (av) < 0)
2860 {
2861 *avp = 0;
2862 SvREFCNT_dec (av);
2863 }
2864
2865 return res;
2866}
2867
2868static void
2869coro_pop_on_enter (pTHX_ void *coro)
2870{
2871 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2872 SvREFCNT_dec (cb);
2873}
2874
2875static void
2876coro_pop_on_leave (pTHX_ void *coro)
2877{
2878 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2879 on_enterleave_call (aTHX_ sv_2mortal (cb));
2880}
2881
2882static void
2883enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2884{
2885 if (!hook)
2886 return;
2887
2888 if (!*avp)
2889 {
2890 *avp = newAV ();
2891 AvREAL_off (*avp);
2892 }
2893
2894 av_push (*avp, (SV *)hook);
2895 av_push (*avp, (SV *)arg);
2896}
2897
2898static void
2899enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2900{
2901 AV *av = *avp;
2902 int i;
2903
2904 if (!av)
2905 return;
2906
2907 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2908 if (AvARRAY (av)[i] == (SV *)hook)
897 { 2909 {
898 coro_nready--; 2910 if (execute)
899 return av_shift (coro_ready[prio]); 2911 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2912
2913 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2914 av_pop (av);
2915 av_pop (av);
2916 break;
900 } 2917 }
901 2918
2919 if (AvFILLp (av) >= 0)
2920 {
2921 *avp = 0;
2922 SvREFCNT_dec_NN (av);
2923 }
2924}
2925
2926static void
2927api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2928{
2929 struct coro *coro = SvSTATE (coro_sv);
2930
2931 if (SvSTATE_current == coro)
2932 if (enter)
2933 enter (aTHX_ enter_arg);
2934
2935 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2936 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2937}
2938
2939static void
2940api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2941{
2942 struct coro *coro = SvSTATE (coro_sv);
2943
2944 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2945 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2946}
2947
2948static void
2949savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2950{
2951 struct coro *coro = SvSTATE_current;
2952
2953 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2954}
2955
2956static void
2957savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2958{
2959 struct coro *coro = SvSTATE_current;
2960
2961 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2962}
2963
2964static void
2965api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2966{
2967 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2968
2969 /* this ought to be much cheaper than malloc + a single destructor call */
2970 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2971 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2972}
2973
2974/*****************************************************************************/
2975/* PerlIO::cede */
2976
2977typedef struct
2978{
2979 PerlIOBuf base;
2980 NV next, every;
2981} PerlIOCede;
2982
2983static IV ecb_cold
2984PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2985{
2986 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2987
2988 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2989 self->next = nvtime () + self->every;
2990
2991 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2992}
2993
2994static SV * ecb_cold
2995PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2996{
2997 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2998
2999 return newSVnv (self->every);
3000}
3001
3002static IV
3003PerlIOCede_flush (pTHX_ PerlIO *f)
3004{
3005 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3006 double now = nvtime ();
3007
3008 if (now >= self->next)
3009 {
3010 api_cede (aTHX);
3011 self->next = now + self->every;
3012 }
3013
3014 return PerlIOBuf_flush (aTHX_ f);
3015}
3016
3017static PerlIO_funcs PerlIO_cede =
3018{
3019 sizeof(PerlIO_funcs),
3020 "cede",
3021 sizeof(PerlIOCede),
3022 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3023 PerlIOCede_pushed,
3024 PerlIOBuf_popped,
3025 PerlIOBuf_open,
3026 PerlIOBase_binmode,
3027 PerlIOCede_getarg,
3028 PerlIOBase_fileno,
3029 PerlIOBuf_dup,
3030 PerlIOBuf_read,
3031 PerlIOBuf_unread,
3032 PerlIOBuf_write,
3033 PerlIOBuf_seek,
3034 PerlIOBuf_tell,
3035 PerlIOBuf_close,
3036 PerlIOCede_flush,
3037 PerlIOBuf_fill,
3038 PerlIOBase_eof,
3039 PerlIOBase_error,
3040 PerlIOBase_clearerr,
3041 PerlIOBase_setlinebuf,
3042 PerlIOBuf_get_base,
3043 PerlIOBuf_bufsiz,
3044 PerlIOBuf_get_ptr,
3045 PerlIOBuf_get_cnt,
3046 PerlIOBuf_set_ptrcnt,
3047};
3048
3049/*****************************************************************************/
3050/* Coro::Semaphore & Coro::Signal */
3051
3052static SV *
3053coro_waitarray_new (pTHX_ int count)
3054{
3055 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3056 AV *av = newAV ();
3057 SV **ary;
3058
3059 /* unfortunately, building manually saves memory */
3060 Newx (ary, 2, SV *);
3061 AvALLOC (av) = ary;
3062#if PERL_VERSION_ATLEAST (5,10,0)
3063 AvARRAY (av) = ary;
3064#else
3065 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3066 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3067 SvPVX ((SV *)av) = (char *)ary;
3068#endif
3069 AvMAX (av) = 1;
3070 AvFILLp (av) = 0;
3071 ary [0] = newSViv (count);
3072
3073 return newRV_noinc ((SV *)av);
3074}
3075
3076/* semaphore */
3077
3078static void
3079coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3080{
3081 SV *count_sv = AvARRAY (av)[0];
3082 IV count = SvIVX (count_sv);
3083
3084 count += adjust;
3085 SvIVX (count_sv) = count;
3086
3087 /* now wake up as many waiters as are expected to lock */
3088 while (count > 0 && AvFILLp (av) > 0)
3089 {
3090 SV *cb;
3091
3092 /* swap first two elements so we can shift a waiter */
3093 AvARRAY (av)[0] = AvARRAY (av)[1];
3094 AvARRAY (av)[1] = count_sv;
3095 cb = av_shift (av);
3096
3097 if (SvOBJECT (cb))
3098 {
3099 api_ready (aTHX_ cb);
3100 --count;
3101 }
3102 else if (SvTYPE (cb) == SVt_PVCV)
3103 {
3104 dSP;
3105 PUSHMARK (SP);
3106 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3107 PUTBACK;
3108 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3109 }
3110
3111 SvREFCNT_dec_NN (cb);
3112 }
3113}
3114
3115static void
3116coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3117{
3118 /* call $sem->adjust (0) to possibly wake up some other waiters */
3119 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3120}
3121
3122static int
3123slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3124{
3125 AV *av = (AV *)frame->data;
3126 SV *count_sv = AvARRAY (av)[0];
3127 SV *coro_hv = SvRV (coro_current);
3128
3129 frame->destroy = 0;
3130
3131 /* if we are about to throw, don't actually acquire the lock, just throw */
3132 if (ecb_expect_false (CORO_THROW))
3133 {
3134 /* we still might be responsible for the semaphore, so wake up others */
3135 coro_semaphore_adjust (aTHX_ av, 0);
3136
3137 return 0;
3138 }
3139 else if (SvIVX (count_sv) > 0)
3140 {
3141 if (acquire)
3142 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3143 else
3144 coro_semaphore_adjust (aTHX_ av, 0);
3145
3146 return 0;
3147 }
3148 else
3149 {
3150 int i;
3151 /* if we were woken up but can't down, we look through the whole */
3152 /* waiters list and only add us if we aren't in there already */
3153 /* this avoids some degenerate memory usage cases */
3154 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3155 if (AvARRAY (av)[i] == coro_hv)
3156 return 1;
3157
3158 av_push (av, SvREFCNT_inc (coro_hv));
3159 return 1;
3160 }
3161}
3162
3163static int
3164slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3165{
3166 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3167}
3168
3169static int
3170slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3173}
3174
3175static void
3176slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3177{
3178 AV *av = (AV *)SvRV (arg [0]);
3179
3180 if (SvIVX (AvARRAY (av)[0]) > 0)
3181 {
3182 frame->data = (void *)av;
3183 frame->prepare = prepare_nop;
3184 }
3185 else
3186 {
3187 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3188
3189 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3190 frame->prepare = prepare_schedule;
3191 /* to avoid race conditions when a woken-up coro gets terminated */
3192 /* we arrange for a temporary on_destroy that calls adjust (0) */
3193 frame->destroy = coro_semaphore_destroy;
3194 }
3195}
3196
3197static void
3198slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3199{
3200 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3201 frame->check = slf_check_semaphore_down;
3202}
3203
3204static void
3205slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3206{
3207 if (items >= 2)
3208 {
3209 /* callback form */
3210 AV *av = (AV *)SvRV (arg [0]);
3211 SV *cb_cv = s_get_cv_croak (arg [1]);
3212
3213 av_push (av, SvREFCNT_inc_NN (cb_cv));
3214
3215 if (SvIVX (AvARRAY (av)[0]) > 0)
3216 coro_semaphore_adjust (aTHX_ av, 0);
3217
3218 frame->prepare = prepare_nop;
3219 frame->check = slf_check_nop;
3220 }
3221 else
3222 {
3223 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3224 frame->check = slf_check_semaphore_wait;
3225 }
3226}
3227
3228/* signal */
3229
3230static void
3231coro_signal_wake (pTHX_ AV *av, int count)
3232{
3233 SvIVX (AvARRAY (av)[0]) = 0;
3234
3235 /* now signal count waiters */
3236 while (count > 0 && AvFILLp (av) > 0)
3237 {
3238 SV *cb;
3239
3240 /* swap first two elements so we can shift a waiter */
3241 cb = AvARRAY (av)[0];
3242 AvARRAY (av)[0] = AvARRAY (av)[1];
3243 AvARRAY (av)[1] = cb;
3244
3245 cb = av_shift (av);
3246
3247 if (SvTYPE (cb) == SVt_PVCV)
3248 {
3249 dSP;
3250 PUSHMARK (SP);
3251 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3252 PUTBACK;
3253 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3254 }
3255 else
3256 {
3257 api_ready (aTHX_ cb);
3258 sv_setiv (cb, 0); /* signal waiter */
3259 }
3260
3261 SvREFCNT_dec_NN (cb);
3262
3263 --count;
3264 }
3265}
3266
3267static int
3268slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3269{
3270 /* if we are about to throw, also stop waiting */
3271 return SvROK ((SV *)frame->data) && !CORO_THROW;
3272}
3273
3274static void
3275slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3276{
3277 AV *av = (AV *)SvRV (arg [0]);
3278
3279 if (items >= 2)
3280 {
3281 SV *cb_cv = s_get_cv_croak (arg [1]);
3282 av_push (av, SvREFCNT_inc_NN (cb_cv));
3283
3284 if (SvIVX (AvARRAY (av)[0]))
3285 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3286
3287 frame->prepare = prepare_nop;
3288 frame->check = slf_check_nop;
3289 }
3290 else if (SvIVX (AvARRAY (av)[0]))
3291 {
3292 SvIVX (AvARRAY (av)[0]) = 0;
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else
3297 {
3298 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3299
3300 av_push (av, waiter);
3301
3302 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3303 frame->prepare = prepare_schedule;
3304 frame->check = slf_check_signal_wait;
3305 }
3306}
3307
3308/*****************************************************************************/
3309/* Coro::AIO */
3310
3311#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3312
3313/* helper storage struct */
3314struct io_state
3315{
3316 int errorno;
3317 I32 laststype; /* U16 in 5.10.0 */
3318 int laststatval;
3319 Stat_t statcache;
3320};
3321
3322static void
3323coro_aio_callback (pTHX_ CV *cv)
3324{
3325 dXSARGS;
3326 AV *state = (AV *)S_GENSUB_ARG;
3327 SV *coro = av_pop (state);
3328 SV *data_sv = newSV (sizeof (struct io_state));
3329
3330 av_extend (state, items - 1);
3331
3332 sv_upgrade (data_sv, SVt_PV);
3333 SvCUR_set (data_sv, sizeof (struct io_state));
3334 SvPOK_only (data_sv);
3335
3336 {
3337 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3338
3339 data->errorno = errno;
3340 data->laststype = PL_laststype;
3341 data->laststatval = PL_laststatval;
3342 data->statcache = PL_statcache;
3343 }
3344
3345 /* now build the result vector out of all the parameters and the data_sv */
3346 {
3347 int i;
3348
3349 for (i = 0; i < items; ++i)
3350 av_push (state, SvREFCNT_inc_NN (ST (i)));
3351 }
3352
3353 av_push (state, data_sv);
3354
3355 api_ready (aTHX_ coro);
3356 SvREFCNT_dec_NN (coro);
3357 SvREFCNT_dec_NN ((AV *)state);
3358}
3359
3360static int
3361slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3362{
3363 AV *state = (AV *)frame->data;
3364
3365 /* if we are about to throw, return early */
3366 /* this does not cancel the aio request, but at least */
3367 /* it quickly returns */
3368 if (CORO_THROW)
3369 return 0;
3370
3371 /* one element that is an RV? repeat! */
3372 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3373 return 1;
3374
3375 /* restore status */
3376 {
3377 SV *data_sv = av_pop (state);
3378 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3379
3380 errno = data->errorno;
3381 PL_laststype = data->laststype;
3382 PL_laststatval = data->laststatval;
3383 PL_statcache = data->statcache;
3384
3385 SvREFCNT_dec_NN (data_sv);
3386 }
3387
3388 /* push result values */
3389 {
3390 dSP;
3391 int i;
3392
3393 EXTEND (SP, AvFILLp (state) + 1);
3394 for (i = 0; i <= AvFILLp (state); ++i)
3395 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3396
3397 PUTBACK;
3398 }
3399
902 return 0; 3400 return 0;
903} 3401}
904 3402
905static void 3403static void
906api_ready (SV *coro) 3404slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
907{ 3405{
908 dTHX; 3406 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
909
910 if (SvROK (coro))
911 coro = SvRV (coro);
912
913 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro));
915 UNLOCK;
916}
917
918static void
919api_schedule (void)
920{
921 dTHX;
922
923 SV *prev, *next;
924
925 LOCK;
926
927 prev = SvRV (GvSV (coro_current)); 3407 SV *coro_hv = SvRV (coro_current);
928 next = coro_deq (aTHX_ PRIO_MIN); 3408 struct coro *coro = SvSTATE_hv (coro_hv);
929 3409
930 if (!next) 3410 /* put our coroutine id on the state arg */
931 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3411 av_push (state, SvREFCNT_inc_NN (coro_hv));
932 3412
933 /* free this only after the transfer */ 3413 /* first see whether we have a non-zero priority and set it as AIO prio */
934 coro_mortal = prev; 3414 if (coro->prio)
935 SV_CORO (prev, "Coro::schedule"); 3415 {
3416 dSP;
936 3417
937 SvRV (GvSV (coro_current)) = next; 3418 static SV *prio_cv;
3419 static SV *prio_sv;
938 3420
939 SV_CORO (next, "Coro::schedule"); 3421 if (ecb_expect_false (!prio_cv))
3422 {
3423 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3424 prio_sv = newSViv (0);
3425 }
940 3426
941 UNLOCK; 3427 PUSHMARK (SP);
3428 sv_setiv (prio_sv, coro->prio);
3429 XPUSHs (prio_sv);
942 3430
943 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3431 PUTBACK;
944 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3432 call_sv (prio_cv, G_VOID | G_DISCARD);
945} 3433 }
946 3434
947static void 3435 /* now call the original request */
948api_cede (void) 3436 {
949{ 3437 dSP;
950 dTHX; 3438 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3439 int i;
951 3440
952 LOCK; 3441 PUSHMARK (SP);
953 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
954 UNLOCK;
955 3442
956 api_schedule (); 3443 /* first push all args to the stack */
957} 3444 EXTEND (SP, items + 1);
958 3445
3446 for (i = 0; i < items; ++i)
3447 PUSHs (arg [i]);
3448
3449 /* now push the callback closure */
3450 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3451
3452 /* now call the AIO function - we assume our request is uncancelable */
3453 PUTBACK;
3454 call_sv ((SV *)req, G_VOID | G_DISCARD);
3455 }
3456
3457 /* now that the request is going, we loop till we have a result */
3458 frame->data = (void *)state;
3459 frame->prepare = prepare_schedule;
3460 frame->check = slf_check_aio_req;
3461}
3462
3463static void
3464coro_aio_req_xs (pTHX_ CV *cv)
3465{
3466 dXSARGS;
3467
3468 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3469
3470 XSRETURN_EMPTY;
3471}
3472
3473/*****************************************************************************/
3474
3475#if CORO_CLONE
3476# include "clone.c"
3477#endif
3478
3479/*****************************************************************************/
3480
3481static SV *
3482coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3483{
3484 SV *coro_sv;
3485 struct coro *coro;
3486 MAGIC *mg;
3487 HV *hv;
3488 SV *cb;
3489 int i;
3490
3491 if (argc > 0)
3492 {
3493 cb = s_get_cv_croak (argv [0]);
3494
3495 if (!is_coro)
3496 {
3497 if (CvISXSUB (cb))
3498 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3499
3500 if (!CvROOT (cb))
3501 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3502 }
3503 }
3504
3505 Newz (0, coro, 1, struct coro);
3506 coro->args = newAV ();
3507 coro->flags = CF_NEW;
3508
3509 if (coro_first) coro_first->prev = coro;
3510 coro->next = coro_first;
3511 coro_first = coro;
3512
3513 coro->hv = hv = newHV ();
3514 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3515 mg->mg_flags |= MGf_DUP;
3516 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3517
3518 if (argc > 0)
3519 {
3520 av_extend (coro->args, argc + is_coro - 1);
3521
3522 if (is_coro)
3523 {
3524 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3525 cb = (SV *)cv_coro_run;
3526 }
3527
3528 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3529
3530 for (i = 1; i < argc; i++)
3531 av_push (coro->args, newSVsv (argv [i]));
3532 }
3533
3534 return coro_sv;
3535}
3536
3537#ifndef __cplusplus
3538ecb_cold XS(boot_Coro__State);
3539#endif
3540
3541#if CORO_JIT
3542
3543static void ecb_noinline ecb_cold
3544pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3545{
3546 dSP;
3547 AV *av = newAV ();
3548
3549 av_store (av, 3, newSVuv (d));
3550 av_store (av, 2, newSVuv (c));
3551 av_store (av, 1, newSVuv (b));
3552 av_store (av, 0, newSVuv (a));
3553
3554 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3555
3556 PUTBACK;
3557}
3558
3559static void ecb_noinline ecb_cold
3560jit_init (pTHX)
3561{
3562 dSP;
3563 SV *load, *save;
3564 char *map_base;
3565 char *load_ptr, *save_ptr;
3566 STRLEN load_len, save_len, map_len;
3567 int count;
3568
3569 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3570
3571 PUSHMARK (SP);
3572 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3573 #include "state.h"
3574 count = call_pv ("Coro::State::_jit", G_ARRAY);
3575 SPAGAIN;
3576
3577 save = POPs; save_ptr = SvPVbyte (save, save_len);
3578 load = POPs; load_ptr = SvPVbyte (load, load_len);
3579
3580 map_len = load_len + save_len + 16;
3581
3582 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3583
3584 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3585
3586 load_perl_slots = (load_save_perl_slots_type)map_base;
3587 memcpy (map_base, load_ptr, load_len);
3588
3589 map_base += (load_len + 15) & ~15;
3590
3591 save_perl_slots = (load_save_perl_slots_type)map_base;
3592 memcpy (map_base, save_ptr, save_len);
3593
3594 /* we are good citizens and try to make the page read-only, so the evil evil */
3595 /* hackers might have it a bit more difficult */
3596 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3597
3598 PUTBACK;
3599 eval_pv ("undef &Coro::State::_jit", 1);
3600}
3601
3602#endif
3603
959MODULE = Coro::State PACKAGE = Coro::State 3604MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
960 3605
961PROTOTYPES: ENABLE 3606PROTOTYPES: DISABLE
962 3607
963BOOT: 3608BOOT:
964{ /* {} necessary for stoopid perl-5.6.x */ 3609{
3610#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3611#include "state.h"
965#ifdef USE_ITHREADS 3612#ifdef USE_ITHREADS
966 MUTEX_INIT (&coro_mutex); 3613# if CORO_PTHREAD
3614 coro_thx = PERL_GET_CONTEXT;
967#endif 3615# endif
3616#endif
3617 /* perl defines these to check for existance first, but why it doesn't */
3618 /* just create them one at init time is not clear to me, except for */
3619 /* programs trying to delete them, but... */
3620 /* anyway, we declare this as invalid and make sure they are initialised here */
3621 DEFSV;
3622 ERRSV;
968 3623
969 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3624 cctx_current = cctx_new_empty ();
970 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3625
3626 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3627 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3628
3629 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3630 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3631 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3632
3633 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3634 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3635
971 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3636 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
972 3637
973 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3638 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
974 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3639 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
975 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3640 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
976 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3641 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
977 3642
978 main_mainstack = PL_mainstack; 3643 main_mainstack = PL_mainstack;
3644 main_top_env = PL_top_env;
979 3645
3646 while (main_top_env->je_prev)
3647 main_top_env = main_top_env->je_prev;
3648
3649 {
3650 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3651
3652 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3653 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3654
3655 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3656 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3657 }
3658
980 coroapi.ver = CORO_API_VERSION; 3659 coroapi.ver = CORO_API_VERSION;
3660 coroapi.rev = CORO_API_REVISION;
3661
981 coroapi.transfer = api_transfer; 3662 coroapi.transfer = api_transfer;
982}
983 3663
984Coro::State 3664 coroapi.sv_state = SvSTATE_;
985_newprocess(args) 3665 coroapi.execute_slf = api_execute_slf;
986 SV * args 3666 coroapi.prepare_nop = prepare_nop;
3667 coroapi.prepare_schedule = prepare_schedule;
3668 coroapi.prepare_cede = prepare_cede;
3669 coroapi.prepare_cede_notself = prepare_cede_notself;
3670
3671 time_init (aTHX);
3672
3673 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3674#if CORO_JIT
3675 PUTBACK;
3676 jit_init (aTHX);
3677 SPAGAIN;
3678#endif
3679}
3680
3681SV *
3682new (SV *klass, ...)
3683 ALIAS:
3684 Coro::new = 1
3685 CODE:
3686 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3687 OUTPUT:
3688 RETVAL
3689
3690void
3691transfer (...)
3692 PROTOTYPE: $$
3693 CODE:
3694 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3695
3696SV *
3697clone (Coro::State coro)
3698 CODE:
3699{
3700#if CORO_CLONE
3701 struct coro *ncoro = coro_clone (aTHX_ coro);
3702 MAGIC *mg;
3703 /* TODO: too much duplication */
3704 ncoro->hv = newHV ();
3705 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3706 mg->mg_flags |= MGf_DUP;
3707 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3708#else
3709 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3710#endif
3711}
3712 OUTPUT:
3713 RETVAL
3714
3715int
3716cctx_stacksize (int new_stacksize = 0)
3717 PROTOTYPE: ;$
3718 CODE:
3719 RETVAL = cctx_stacksize;
3720 if (new_stacksize)
3721 {
3722 cctx_stacksize = new_stacksize;
3723 ++cctx_gen;
3724 }
3725 OUTPUT:
3726 RETVAL
3727
3728int
3729cctx_max_idle (int max_idle = 0)
3730 PROTOTYPE: ;$
3731 CODE:
3732 RETVAL = cctx_max_idle;
3733 if (max_idle > 1)
3734 cctx_max_idle = max_idle;
3735 OUTPUT:
3736 RETVAL
3737
3738int
3739cctx_count ()
3740 PROTOTYPE:
3741 CODE:
3742 RETVAL = cctx_count;
3743 OUTPUT:
3744 RETVAL
3745
3746int
3747cctx_idle ()
3748 PROTOTYPE:
3749 CODE:
3750 RETVAL = cctx_idle;
3751 OUTPUT:
3752 RETVAL
3753
3754void
3755list ()
3756 PROTOTYPE:
3757 PPCODE:
3758{
3759 struct coro *coro;
3760 for (coro = coro_first; coro; coro = coro->next)
3761 if (coro->hv)
3762 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3763}
3764
3765void
3766call (Coro::State coro, SV *coderef)
3767 ALIAS:
3768 eval = 1
3769 CODE:
3770{
3771 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3772 {
3773 struct coro *current = SvSTATE_current;
3774 struct CoroSLF slf_save;
3775
3776 if (current != coro)
3777 {
3778 PUTBACK;
3779 save_perl (aTHX_ current);
3780 load_perl (aTHX_ coro);
3781 /* the coro is most likely in an active SLF call.
3782 * while not strictly required (the code we execute is
3783 * not allowed to call any SLF functions), it's cleaner
3784 * to reinitialise the slf_frame and restore it later.
3785 * This might one day allow us to actually do SLF calls
3786 * from code executed here.
3787 */
3788 slf_save = slf_frame;
3789 slf_frame.prepare = 0;
3790 SPAGAIN;
3791 }
3792
3793 PUSHSTACK;
3794
3795 PUSHMARK (SP);
3796 PUTBACK;
3797
3798 if (ix)
3799 eval_sv (coderef, 0);
3800 else
3801 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3802
3803 POPSTACK;
3804 SPAGAIN;
3805
3806 if (current != coro)
3807 {
3808 PUTBACK;
3809 slf_frame = slf_save;
3810 save_perl (aTHX_ coro);
3811 load_perl (aTHX_ current);
3812 SPAGAIN;
3813 }
3814 }
3815}
3816
3817SV *
3818is_ready (Coro::State coro)
987 PROTOTYPE: $ 3819 PROTOTYPE: $
3820 ALIAS:
3821 is_ready = CF_READY
3822 is_running = CF_RUNNING
3823 is_new = CF_NEW
3824 is_destroyed = CF_ZOMBIE
3825 is_zombie = CF_ZOMBIE
3826 is_suspended = CF_SUSPENDED
3827 CODE:
3828 RETVAL = boolSV (coro->flags & ix);
3829 OUTPUT:
3830 RETVAL
3831
3832void
3833throw (SV *self, SV *exception = &PL_sv_undef)
3834 PROTOTYPE: $;$
988 CODE: 3835 CODE:
989 Coro__State coro; 3836{
3837 struct coro *coro = SvSTATE (self);
3838 struct coro *current = SvSTATE_current;
3839 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3840 SvREFCNT_dec (*exceptionp);
3841 SvGETMAGIC (exception);
3842 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
990 3843
991 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3844 api_ready (aTHX_ self);
992 croak ("Coro::State::_newprocess expects an arrayref"); 3845}
3846
3847void
3848api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3849 PROTOTYPE: $;$
3850 C_ARGS: aTHX_ coro, flags
3851
3852SV *
3853has_cctx (Coro::State coro)
3854 PROTOTYPE: $
3855 CODE:
3856 /* maybe manage the running flag differently */
3857 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3858 OUTPUT:
3859 RETVAL
3860
3861int
3862is_traced (Coro::State coro)
3863 PROTOTYPE: $
3864 CODE:
3865 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3866 OUTPUT:
3867 RETVAL
3868
3869UV
3870rss (Coro::State coro)
3871 PROTOTYPE: $
3872 ALIAS:
3873 usecount = 1
3874 CODE:
3875 switch (ix)
3876 {
3877 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3878 case 1: RETVAL = coro->usecount; break;
993 3879 }
994 Newz (0, coro, 1, struct coro); 3880 OUTPUT:
995
996 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
997 /*coro->mainstack = 0; *//*actual work is done inside transfer */
998 /*coro->stack = 0;*/
999
1000 /* same as JMPENV_BOOTSTRAP */
1001 /* we might be able to recycle start_env, but safe is safe */
1002 /*Zero(&coro->start_env, 1, JMPENV);*/
1003 coro->start_env.je_ret = -1;
1004 coro->start_env.je_mustcatch = TRUE;
1005
1006 RETVAL = coro; 3881 RETVAL
3882
3883void
3884force_cctx ()
3885 PROTOTYPE:
3886 CODE:
3887 cctx_current->idle_sp = 0;
3888
3889void
3890swap_defsv (Coro::State self)
3891 PROTOTYPE: $
3892 ALIAS:
3893 swap_defav = 1
3894 CODE:
3895 if (!self->slot)
3896 croak ("cannot swap state with coroutine that has no saved state,");
3897 else
3898 {
3899 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3900 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3901
3902 SV *tmp = *src; *src = *dst; *dst = tmp;
3903 }
3904
3905void
3906cancel (Coro::State self)
3907 CODE:
3908 coro_state_destroy (aTHX_ self);
3909
3910SV *
3911enable_times (int enabled = enable_times)
3912 CODE:
3913{
3914 RETVAL = boolSV (enable_times);
3915
3916 if (enabled != enable_times)
3917 {
3918 enable_times = enabled;
3919
3920 coro_times_update ();
3921 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3922 }
3923}
1007 OUTPUT: 3924 OUTPUT:
1008 RETVAL 3925 RETVAL
1009 3926
1010void 3927void
1011transfer(prev, next, flags) 3928times (Coro::State self)
1012 SV *prev 3929 PPCODE:
1013 SV *next 3930{
1014 int flags 3931 struct coro *current = SvSTATE (coro_current);
1015 PROTOTYPE: @ 3932
3933 if (ecb_expect_false (current == self))
3934 {
3935 coro_times_update ();
3936 coro_times_add (SvSTATE (coro_current));
3937 }
3938
3939 EXTEND (SP, 2);
3940 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3941 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3942
3943 if (ecb_expect_false (current == self))
3944 coro_times_sub (SvSTATE (coro_current));
3945}
3946
3947void
3948swap_sv (Coro::State coro, SV *sva, SV *svb)
3949 CODE:
3950{
3951 struct coro *current = SvSTATE_current;
3952 AV *swap_sv;
3953 int i;
3954
3955 sva = SvRV (sva);
3956 svb = SvRV (svb);
3957
3958 if (current == coro)
3959 SWAP_SVS_LEAVE (current);
3960
3961 if (!coro->swap_sv)
3962 coro->swap_sv = newAV ();
3963
3964 swap_sv = coro->swap_sv;
3965
3966 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3967 {
3968 SV *a = AvARRAY (swap_sv)[i ];
3969 SV *b = AvARRAY (swap_sv)[i + 1];
3970
3971 if (a == sva && b == svb)
3972 {
3973 SvREFCNT_dec_NN (a);
3974 SvREFCNT_dec_NN (b);
3975
3976 for (; i <= AvFILLp (swap_sv) - 2; i++)
3977 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3978
3979 AvFILLp (swap_sv) -= 2;
3980
3981 goto removed;
3982 }
3983 }
3984
3985 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3986 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3987
3988 removed:
3989
3990 if (current == coro)
3991 SWAP_SVS_ENTER (current);
3992}
3993
3994
3995MODULE = Coro::State PACKAGE = Coro
3996
3997BOOT:
3998{
3999 if (SVt_LAST > 32)
4000 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
4001
4002 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4003 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4004 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4005 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4006 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4007 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4008 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4009 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4010
4011 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4012 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4013 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4014 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4015
4016 coro_stash = gv_stashpv ("Coro", TRUE);
4017
4018 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4019 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4020 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4021 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4022 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4023 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4024
4025 {
4026 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4027
4028 coroapi.schedule = api_schedule;
4029 coroapi.schedule_to = api_schedule_to;
4030 coroapi.cede = api_cede;
4031 coroapi.cede_notself = api_cede_notself;
4032 coroapi.ready = api_ready;
4033 coroapi.is_ready = api_is_ready;
4034 coroapi.nready = coro_nready;
4035 coroapi.current = coro_current;
4036
4037 coroapi.enterleave_hook = api_enterleave_hook;
4038 coroapi.enterleave_unhook = api_enterleave_unhook;
4039 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4040
4041 /*GCoroAPI = &coroapi;*/
4042 sv_setiv (sv, (IV)&coroapi);
4043 SvREADONLY_on (sv);
4044 }
4045}
4046
4047SV *
4048async (...)
4049 PROTOTYPE: &@
1016 CODE: 4050 CODE:
1017 PUTBACK; 4051 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1018 SV_CORO (next, "Coro::transfer"); 4052 api_ready (aTHX_ RETVAL);
1019 SV_CORO (prev, "Coro::transfer"); 4053 OUTPUT:
1020 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 4054 RETVAL
1021 SPAGAIN;
1022 4055
1023void 4056void
1024DESTROY(coro) 4057_destroy (Coro::State coro)
1025 Coro::State coro 4058 CODE:
1026 CODE: 4059 /* used by the manager thread */
1027 4060 coro_state_destroy (aTHX_ coro);
1028 if (coro->mainstack && coro->mainstack != main_mainstack)
1029 {
1030 struct coro temp;
1031
1032 PUTBACK;
1033 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1034 LOAD (aTHX_ coro);
1035 SPAGAIN;
1036
1037 destroy_stacks (aTHX);
1038
1039 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1040 SPAGAIN;
1041
1042 coro->mainstack = 0;
1043 }
1044
1045 deallocate_stack (coro);
1046 SvREFCNT_dec (coro->args);
1047 Safefree (coro);
1048 4061
1049void 4062void
1050_exit(code) 4063on_destroy (Coro::State coro, SV *cb)
1051 int code 4064 CODE:
4065 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4066
4067void
4068join (...)
4069 CODE:
4070 CORO_EXECUTE_SLF_XS (slf_init_join);
4071
4072void
4073terminate (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4076
4077void
4078cancel (...)
4079 CODE:
4080 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4081
4082int
4083safe_cancel (Coro::State self, ...)
4084 C_ARGS: aTHX_ self, &ST (1), items - 1
4085
4086void
4087schedule (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4090
4091void
4092schedule_to (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4095
4096void
4097cede_to (...)
4098 CODE:
4099 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4100
4101void
4102cede (...)
4103 CODE:
4104 CORO_EXECUTE_SLF_XS (slf_init_cede);
4105
4106void
4107cede_notself (...)
4108 CODE:
4109 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4110
4111void
4112_set_current (SV *current)
1052 PROTOTYPE: $ 4113 PROTOTYPE: $
1053 CODE: 4114 CODE:
1054 _exit (code); 4115 SvREFCNT_dec_NN (SvRV (coro_current));
1055 4116 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1056MODULE = Coro::State PACKAGE = Coro::Cont
1057
1058# this is slightly dirty (should expose a c-level api)
1059 4117
1060void 4118void
1061yield(...) 4119_set_readyhook (SV *hook)
1062 PROTOTYPE: @ 4120 PROTOTYPE: $
1063 CODE: 4121 CODE:
1064 SV *yieldstack;
1065 SV *sv;
1066 AV *defav = GvAV (PL_defgv);
1067 struct coro *prev, *next;
1068
1069 yieldstack = *hv_fetch (
1070 (HV *)SvRV (GvSV (coro_current)),
1071 "yieldstack", sizeof ("yieldstack") - 1,
1072 0
1073 );
1074
1075 /* set up @_ -- ugly */
1076 av_clear (defav);
1077 av_fill (defav, items - 1);
1078 while (items--)
1079 av_store (defav, items, SvREFCNT_inc (ST(items)));
1080
1081 sv = av_pop ((AV *)SvRV (yieldstack));
1082 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1083 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1084 SvREFCNT_dec (sv); 4122 SvREFCNT_dec (coro_readyhook);
1085 4123 SvGETMAGIC (hook);
1086 transfer (aTHX_ prev, next, 0); 4124 if (SvOK (hook))
1087 4125 {
1088MODULE = Coro::State PACKAGE = Coro
1089
1090# this is slightly dirty (should expose a c-level api)
1091
1092BOOT:
1093{
1094 int i;
1095 HV *stash = gv_stashpv ("Coro", TRUE);
1096
1097 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1098 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1099 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1100 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1101 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1102 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1103
1104 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1105 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1106
1107 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1108 coro_ready[i] = newAV (); 4126 coro_readyhook = newSVsv (hook);
1109 4127 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1110 {
1111 SV *sv = perl_get_sv("Coro::API", 1);
1112
1113 coroapi.schedule = api_schedule;
1114 coroapi.cede = api_cede;
1115 coroapi.ready = api_ready;
1116 coroapi.nready = &coro_nready;
1117 coroapi.current = coro_current;
1118
1119 GCoroAPI = &coroapi;
1120 sv_setiv(sv, (IV)&coroapi);
1121 SvREADONLY_on(sv);
1122 } 4128 }
1123} 4129 else
4130 {
4131 coro_readyhook = 0;
4132 CORO_READYHOOK = 0;
4133 }
1124 4134
1125#if !PERL_MICRO 4135int
4136prio (Coro::State coro, int newprio = 0)
4137 PROTOTYPE: $;$
4138 ALIAS:
4139 nice = 1
4140 CODE:
4141{
4142 RETVAL = coro->prio;
1126 4143
1127void 4144 if (items > 1)
4145 {
4146 if (ix)
4147 newprio = coro->prio - newprio;
4148
4149 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4150 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4151
4152 coro->prio = newprio;
4153 }
4154}
4155 OUTPUT:
4156 RETVAL
4157
4158SV *
1128ready(self) 4159ready (SV *self)
1129 SV * self
1130 PROTOTYPE: $ 4160 PROTOTYPE: $
1131 CODE: 4161 CODE:
1132 api_ready (self); 4162 RETVAL = boolSV (api_ready (aTHX_ self));
1133 4163 OUTPUT:
1134#endif 4164 RETVAL
1135 4165
1136int 4166int
1137nready(...) 4167nready (...)
1138 PROTOTYPE: 4168 PROTOTYPE:
1139 CODE: 4169 CODE:
1140 RETVAL = coro_nready; 4170 RETVAL = coro_nready;
1141 OUTPUT: 4171 OUTPUT:
1142 RETVAL 4172 RETVAL
1143 4173
1144void 4174void
1145schedule(...) 4175suspend (Coro::State self)
1146 PROTOTYPE: 4176 PROTOTYPE: $
1147 CODE: 4177 CODE:
1148 api_schedule (); 4178 self->flags |= CF_SUSPENDED;
1149 4179
1150void 4180void
1151cede(...) 4181resume (Coro::State self)
1152 PROTOTYPE: 4182 PROTOTYPE: $
1153 CODE: 4183 CODE:
1154 api_cede (); 4184 self->flags &= ~CF_SUSPENDED;
1155 4185
1156# and these are hacks 4186void
4187_pool_handler (...)
4188 CODE:
4189 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4190
4191void
4192async_pool (SV *cv, ...)
4193 PROTOTYPE: &@
4194 PPCODE:
4195{
4196 HV *hv = (HV *)av_pop (av_async_pool);
4197 AV *av = newAV ();
4198 SV *cb = ST (0);
4199 int i;
4200
4201 av_extend (av, items - 2);
4202 for (i = 1; i < items; ++i)
4203 av_push (av, SvREFCNT_inc_NN (ST (i)));
4204
4205 if ((SV *)hv == &PL_sv_undef)
4206 {
4207 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4208 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4209 SvREFCNT_dec_NN (sv);
4210 }
4211
4212 {
4213 struct coro *coro = SvSTATE_hv (hv);
4214
4215 assert (!coro->invoke_cb);
4216 assert (!coro->invoke_av);
4217 coro->invoke_cb = SvREFCNT_inc (cb);
4218 coro->invoke_av = av;
4219 }
4220
4221 api_ready (aTHX_ (SV *)hv);
4222
4223 if (GIMME_V != G_VOID)
4224 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4225 else
4226 SvREFCNT_dec_NN (hv);
4227}
4228
1157SV * 4229SV *
1158_aio_get_state () 4230rouse_cb ()
4231 PROTOTYPE:
1159 CODE: 4232 CODE:
1160{ 4233 RETVAL = coro_new_rouse_cb (aTHX);
1161 struct {
1162 int errorno;
1163 int laststype;
1164 int laststatval;
1165 Stat_t statcache;
1166 } data;
1167
1168 data.errorno = errno;
1169 data.laststype = PL_laststype;
1170 data.laststatval = PL_laststatval;
1171 data.statcache = PL_statcache;
1172
1173 RETVAL = newSVpvn ((char *)&data, sizeof data);
1174}
1175 OUTPUT: 4234 OUTPUT:
1176 RETVAL 4235 RETVAL
1177 4236
1178void 4237void
1179_aio_set_state (char *data_) 4238rouse_wait (...)
4239 PROTOTYPE: ;$
4240 PPCODE:
4241 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4242
4243void
4244on_enter (SV *block)
4245 ALIAS:
4246 on_leave = 1
1180 PROTOTYPE: $ 4247 PROTOTYPE: &
1181 CODE: 4248 CODE:
1182{ 4249{
1183 struct { 4250 struct coro *coro = SvSTATE_current;
4251 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4252
4253 block = s_get_cv_croak (block);
4254
4255 if (!*avp)
4256 *avp = newAV ();
4257
4258 av_push (*avp, SvREFCNT_inc (block));
4259
4260 if (!ix)
4261 on_enterleave_call (aTHX_ block);
4262
4263 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4264 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4265 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4266}
4267
4268
4269MODULE = Coro::State PACKAGE = PerlIO::cede
4270
4271BOOT:
4272 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4273
4274
4275MODULE = Coro::State PACKAGE = Coro::Semaphore
4276
4277SV *
4278new (SV *klass, SV *count = 0)
4279 CODE:
4280{
4281 int semcnt = 1;
4282
4283 if (count)
4284 {
4285 SvGETMAGIC (count);
4286
4287 if (SvOK (count))
4288 semcnt = SvIV (count);
4289 }
4290
4291 RETVAL = sv_bless (
4292 coro_waitarray_new (aTHX_ semcnt),
4293 GvSTASH (CvGV (cv))
4294 );
4295}
4296 OUTPUT:
4297 RETVAL
4298
4299# helper for Coro::Channel and others
4300SV *
4301_alloc (int count)
4302 CODE:
4303 RETVAL = coro_waitarray_new (aTHX_ count);
4304 OUTPUT:
4305 RETVAL
4306
4307SV *
4308count (SV *self)
4309 CODE:
4310 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4311 OUTPUT:
4312 RETVAL
4313
4314void
4315up (SV *self)
4316 CODE:
4317 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4318
4319void
4320adjust (SV *self, int adjust)
4321 CODE:
4322 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4323
4324void
4325down (...)
4326 CODE:
4327 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4328
4329void
4330wait (...)
4331 CODE:
4332 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4333
4334void
4335try (SV *self)
4336 PPCODE:
4337{
4338 AV *av = (AV *)SvRV (self);
4339 SV *count_sv = AvARRAY (av)[0];
4340 IV count = SvIVX (count_sv);
4341
4342 if (count > 0)
4343 {
4344 --count;
4345 SvIVX (count_sv) = count;
4346 XSRETURN_YES;
4347 }
4348 else
4349 XSRETURN_NO;
4350}
4351
4352void
4353waiters (SV *self)
4354 PPCODE:
4355{
4356 AV *av = (AV *)SvRV (self);
4357 int wcount = AvFILLp (av) + 1 - 1;
4358
4359 if (GIMME_V == G_SCALAR)
4360 XPUSHs (sv_2mortal (newSViv (wcount)));
4361 else
4362 {
1184 int errorno; 4363 int i;
1185 int laststype; 4364 EXTEND (SP, wcount);
1186 int laststatval; 4365 for (i = 1; i <= wcount; ++i)
1187 Stat_t statcache; 4366 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1188 } *data = (void *)data_; 4367 }
1189
1190 errno = data->errorno;
1191 PL_laststype = data->laststype;
1192 PL_laststatval = data->laststatval;
1193 PL_statcache = data->statcache;
1194} 4368}
4369
4370MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4371
4372void
4373_may_delete (SV *sem, int count, unsigned int extra_refs)
4374 PPCODE:
4375{
4376 AV *av = (AV *)SvRV (sem);
4377
4378 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4379 && AvFILLp (av) == 0 /* no waiters, just count */
4380 && SvIV (AvARRAY (av)[0]) == count)
4381 XSRETURN_YES;
4382
4383 XSRETURN_NO;
4384}
4385
4386MODULE = Coro::State PACKAGE = Coro::Signal
4387
4388SV *
4389new (SV *klass)
4390 CODE:
4391 RETVAL = sv_bless (
4392 coro_waitarray_new (aTHX_ 0),
4393 GvSTASH (CvGV (cv))
4394 );
4395 OUTPUT:
4396 RETVAL
4397
4398void
4399wait (...)
4400 CODE:
4401 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4402
4403void
4404broadcast (SV *self)
4405 CODE:
4406{
4407 AV *av = (AV *)SvRV (self);
4408 coro_signal_wake (aTHX_ av, AvFILLp (av));
4409}
4410
4411void
4412send (SV *self)
4413 CODE:
4414{
4415 AV *av = (AV *)SvRV (self);
4416
4417 if (AvFILLp (av))
4418 coro_signal_wake (aTHX_ av, 1);
4419 else
4420 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4421}
4422
4423IV
4424awaited (SV *self)
4425 CODE:
4426 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4427 OUTPUT:
4428 RETVAL
4429
4430
4431MODULE = Coro::State PACKAGE = Coro::AnyEvent
4432
4433BOOT:
4434 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4435
4436void
4437_schedule (...)
4438 CODE:
4439{
4440 static int incede;
4441
4442 api_cede_notself (aTHX);
4443
4444 ++incede;
4445 while (coro_nready >= incede && api_cede (aTHX))
4446 ;
4447
4448 sv_setsv (sv_activity, &PL_sv_undef);
4449 if (coro_nready >= incede)
4450 {
4451 PUSHMARK (SP);
4452 PUTBACK;
4453 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4454 }
4455
4456 --incede;
4457}
4458
4459
4460MODULE = Coro::State PACKAGE = Coro::AIO
4461
4462void
4463_register (char *target, char *proto, SV *req)
4464 CODE:
4465{
4466 SV *req_cv = s_get_cv_croak (req);
4467 /* newXSproto doesn't return the CV on 5.8 */
4468 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4469 sv_setpv ((SV *)slf_cv, proto);
4470 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4471}
4472
4473MODULE = Coro::State PACKAGE = Coro::Select
4474
4475void
4476patch_pp_sselect ()
4477 CODE:
4478 if (!coro_old_pp_sselect)
4479 {
4480 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4481 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4482 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4483 }
4484
4485void
4486unpatch_pp_sselect ()
4487 CODE:
4488 if (coro_old_pp_sselect)
4489 {
4490 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4491 coro_old_pp_sselect = 0;
4492 }
4493
4494MODULE = Coro::State PACKAGE = Coro::Util
4495
4496void
4497_exit (int code)
4498 CODE:
4499 _exit (code);
4500
4501NV
4502time ()
4503 CODE:
4504 RETVAL = nvtime (aTHX);
4505 OUTPUT:
4506 RETVAL
4507
4508NV
4509gettimeofday ()
4510 PPCODE:
4511{
4512 UV tv [2];
4513 u2time (aTHX_ tv);
4514 EXTEND (SP, 2);
4515 PUSHs (sv_2mortal (newSVuv (tv [0])));
4516 PUSHs (sv_2mortal (newSVuv (tv [1])));
4517}
4518

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