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Comparing Coro/Coro/State.xs (file contents):
Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs.
Revision 1.460 by root, Fri Jun 17 05:28:22 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;
529 968
530#if PERL_VERSION < 9 969#if !PERL_VERSION_ATLEAST (5,10,0)
531 New(54,PL_retstack,8,OP*); 970 New(54,PL_retstack,4,OP*);
532 PL_retstack_ix = 0; 971 PL_retstack_ix = 0;
533 PL_retstack_max = 8; 972 PL_retstack_max = 4;
534#endif 973#endif
535
536 UNLOCK;
537} 974}
975#endif
538 976
539/* 977/*
540 * destroy the stacks, the callchain etc... 978 * destroy the stacks, the callchain etc...
541 */ 979 */
542STATIC void 980static void
543destroy_stacks(pTHX) 981coro_destruct_stacks (pTHX)
544{ 982{
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) 983 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 984 PL_curstackinfo = PL_curstackinfo->si_next;
558 985
559 while (PL_curstackinfo) 986 while (PL_curstackinfo)
560 { 987 {
561 PERL_SI *p = PL_curstackinfo->si_prev; 988 PERL_SI *p = PL_curstackinfo->si_prev;
562 989
563 { /*D*//*remove*/
564 dSP;
565 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566 PUTBACK; /* possibly superfluous */
567 }
568
569 if (!IN_DESTRUCT) 990 if (!IN_DESTRUCT)
570 {
571 dounwind (-1);/*D*//*remove*/
572 SvREFCNT_dec (PL_curstackinfo->si_stack); 991 SvREFCNT_dec (PL_curstackinfo->si_stack);
573 }
574 992
575 Safefree (PL_curstackinfo->si_cxstack); 993 Safefree (PL_curstackinfo->si_cxstack);
576 Safefree (PL_curstackinfo); 994 Safefree (PL_curstackinfo);
577 PL_curstackinfo = p; 995 PL_curstackinfo = p;
578 } 996 }
579 997
580 Safefree (PL_tmps_stack); 998 Safefree (PL_tmps_stack);
581 Safefree (PL_markstack); 999 Safefree (PL_markstack);
582 Safefree (PL_scopestack); 1000 Safefree (PL_scopestack);
1001#if HAS_SCOPESTACK_NAME
1002 Safefree (PL_scopestack_name);
1003#endif
583 Safefree (PL_savestack); 1004 Safefree (PL_savestack);
584#if PERL_VERSION < 9 1005#if !PERL_VERSION_ATLEAST (5,10,0)
585 Safefree (PL_retstack); 1006 Safefree (PL_retstack);
586#endif 1007#endif
587} 1008}
588 1009
589static void 1010#define CORO_RSS \
590allocate_stack (Coro__State ctx, int alloc) 1011 rss += sizeof (SYM (curstackinfo)); \
591{ 1012 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
592 coro_stack *stack; 1013 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1014 rss += SYM (tmps_max) * sizeof (SV *); \
1015 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1016 rss += SYM (scopestack_max) * sizeof (I32); \
1017 rss += SYM (savestack_max) * sizeof (ANY);
593 1018
594 New (0, stack, 1, coro_stack); 1019static size_t
1020coro_rss (pTHX_ struct coro *coro)
1021{
1022 size_t rss = sizeof (*coro);
595 1023
596 stack->refcnt = 1; 1024 if (coro->mainstack)
597 stack->usecnt = 1;
598 stack->gencnt = ctx->gencnt = 0;
599
600 if (alloc)
601 { 1025 {
602#if HAVE_MMAP 1026 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 { 1027 {
608 /*FIXME*//*D*//* reasonable stack size! */ 1028 #define SYM(sym) PL_ ## sym
609 stack->ssize = - (STACKSIZE * sizeof (long)); 1029 CORO_RSS;
610 New (0, stack->sptr, STACKSIZE, long); 1030 #undef SYM
611 } 1031 }
612 }
613 else 1032 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 { 1033 {
630#ifdef HAVE_MMAP 1034 #define SYM(sym) coro->slot->sym
631 if (stack->ssize > 0 && stack->sptr) 1035 CORO_RSS;
632 munmap (stack->sptr, stack->ssize); 1036 #undef SYM
1037 }
1038 }
1039
1040 return rss;
1041}
1042
1043/** coroutine stack handling ************************************************/
1044
1045static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1046static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1047static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1048
1049/* apparently < 5.8.8 */
1050#ifndef MgPV_nolen_const
1051#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1052 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1053 (const char*)(mg)->mg_ptr)
1054#endif
1055
1056/*
1057 * This overrides the default magic get method of %SIG elements.
1058 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1059 * and instead of trying to save and restore the hash elements (extremely slow),
1060 * we just provide our own readback here.
1061 */
1062static int ecb_cold
1063coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1064{
1065 const char *s = MgPV_nolen_const (mg);
1066
1067 if (*s == '_')
1068 {
1069 SV **svp = 0;
1070
1071 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1072 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1073
1074 if (svp)
1075 {
1076 SV *ssv;
1077
1078 if (!*svp)
1079 ssv = &PL_sv_undef;
1080 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1081 ssv = sv_2mortal (newRV_inc (*svp));
633 else 1082 else
634#endif 1083 ssv = *svp;
635 Safefree (stack->sptr);
636 1084
637 Safefree (stack); 1085 sv_setsv (sv, ssv);
1086 return 0;
638 } 1087 }
639 else if (ctx->gencnt == stack->gencnt) 1088 }
640 --stack->usecnt; 1089
1090 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1091}
1092
1093static int ecb_cold
1094coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1095{
1096 const char *s = MgPV_nolen_const (mg);
1097
1098 if (*s == '_')
641 } 1099 {
642} 1100 SV **svp = 0;
643 1101
1102 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1103 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1104
1105 if (svp)
1106 {
1107 SV *old = *svp;
1108 *svp = 0;
1109 SvREFCNT_dec (old);
1110 return 0;
1111 }
1112 }
1113
1114 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1115}
1116
1117static int ecb_cold
1118coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121
1122 if (*s == '_')
1123 {
1124 SV **svp = 0;
1125
1126 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1127 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1128
1129 if (svp)
1130 {
1131 SV *old = *svp;
1132 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1133 SvREFCNT_dec (old);
1134 return 0;
1135 }
1136 }
1137
1138 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1139}
1140
1141static void
1142prepare_nop (pTHX_ struct coro_transfer_args *ta)
1143{
1144 /* kind of mega-hacky, but works */
1145 ta->next = ta->prev = (struct coro *)ta;
1146}
1147
644static void 1148static int
645setup_coro (void *arg) 1149slf_check_nop (pTHX_ struct CoroSLF *frame)
1150{
1151 return 0;
1152}
1153
1154static int
1155slf_check_repeat (pTHX_ struct CoroSLF *frame)
1156{
1157 return 1;
1158}
1159
1160static UNOP init_perl_op;
1161
1162ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1163init_perl (pTHX_ struct coro *coro)
646{ 1164{
647 /* 1165 /*
648 * emulate part of the perl startup here. 1166 * emulate part of the perl startup here.
649 */ 1167 */
1168 coro_init_stacks (aTHX);
1169
1170 PL_runops = RUNOPS_DEFAULT;
1171 PL_curcop = &PL_compiling;
1172 PL_in_eval = EVAL_NULL;
1173 PL_comppad = 0;
1174 PL_comppad_name = 0;
1175 PL_comppad_name_fill = 0;
1176 PL_comppad_name_floor = 0;
1177 PL_curpm = 0;
1178 PL_curpad = 0;
1179 PL_localizing = 0;
1180 PL_restartop = 0;
1181#if PERL_VERSION_ATLEAST (5,10,0)
1182 PL_parser = 0;
1183#endif
1184 PL_hints = 0;
1185
1186 /* recreate the die/warn hooks */
1187 PL_diehook = SvREFCNT_inc (rv_diehook);
1188 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1189
1190 GvSV (PL_defgv) = newSV (0);
1191 GvAV (PL_defgv) = coro->args; coro->args = 0;
1192 GvSV (PL_errgv) = newSV (0);
1193 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1194 GvHV (PL_hintgv) = newHV ();
1195#if PERL_VERSION_ATLEAST (5,10,0)
1196 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1197#endif
1198 PL_rs = newSVsv (GvSV (irsgv));
1199 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1200
1201 {
1202 dSP;
1203 UNOP myop;
1204
1205 Zero (&myop, 1, UNOP);
1206 myop.op_next = Nullop;
1207 myop.op_type = OP_ENTERSUB;
1208 myop.op_flags = OPf_WANT_VOID;
1209
1210 PUSHMARK (SP);
1211 PUSHs ((SV *)coro->startcv);
1212 PUTBACK;
1213 PL_op = (OP *)&myop;
1214 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1215 }
1216
1217 /* this newly created coroutine might be run on an existing cctx which most
1218 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1219 */
1220 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1221 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1222 slf_frame.destroy = 0;
1223
1224 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1225 init_perl_op.op_next = PL_op;
1226 init_perl_op.op_type = OP_ENTERSUB;
1227 init_perl_op.op_ppaddr = pp_slf;
1228 /* no flags etc. required, as an init function won't be called */
1229
1230 PL_op = (OP *)&init_perl_op;
1231
1232 /* copy throw, in case it was set before init_perl */
1233 CORO_THROW = coro->except;
1234
1235 SWAP_SVS_ENTER (coro);
1236
1237 if (ecb_expect_false (enable_times))
1238 {
1239 coro_times_update ();
1240 coro_times_sub (coro);
1241 }
1242}
1243
1244static void
1245coro_unwind_stacks (pTHX)
1246{
1247 if (!IN_DESTRUCT)
1248 {
1249 /* restore all saved variables and stuff */
1250 LEAVE_SCOPE (0);
1251 assert (PL_tmps_floor == -1);
1252
1253 /* free all temporaries */
1254 FREETMPS;
1255 assert (PL_tmps_ix == -1);
1256
1257 /* unwind all extra stacks */
1258 POPSTACK_TO (PL_mainstack);
1259
1260 /* unwind main stack */
1261 dounwind (-1);
1262 }
1263}
1264
1265static void
1266destroy_perl (pTHX_ struct coro *coro)
1267{
1268 SV *svf [9];
1269
1270 {
1271 SV *old_current = SvRV (coro_current);
1272 struct coro *current = SvSTATE (old_current);
1273
1274 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1275
1276 save_perl (aTHX_ current);
1277
1278 /* this will cause transfer_check to croak on block*/
1279 SvRV_set (coro_current, (SV *)coro->hv);
1280
1281 load_perl (aTHX_ coro);
1282
1283 /* restore swapped sv's */
1284 SWAP_SVS_LEAVE (coro);
1285
1286 coro_unwind_stacks (aTHX);
1287
1288 coro_destruct_stacks (aTHX);
1289
1290 /* now save some sv's to be free'd later */
1291 svf [0] = GvSV (PL_defgv);
1292 svf [1] = (SV *)GvAV (PL_defgv);
1293 svf [2] = GvSV (PL_errgv);
1294 svf [3] = (SV *)PL_defoutgv;
1295 svf [4] = PL_rs;
1296 svf [5] = GvSV (irsgv);
1297 svf [6] = (SV *)GvHV (PL_hintgv);
1298 svf [7] = PL_diehook;
1299 svf [8] = PL_warnhook;
1300 assert (9 == sizeof (svf) / sizeof (*svf));
1301
1302 SvRV_set (coro_current, old_current);
1303
1304 load_perl (aTHX_ current);
1305 }
1306
1307 {
1308 unsigned int i;
1309
1310 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1311 SvREFCNT_dec (svf [i]);
1312
1313 SvREFCNT_dec (coro->saved_deffh);
1314 SvREFCNT_dec (coro->rouse_cb);
1315 SvREFCNT_dec (coro->invoke_cb);
1316 SvREFCNT_dec (coro->invoke_av);
1317 SvREFCNT_dec (coro->on_enter_xs);
1318 SvREFCNT_dec (coro->on_leave_xs);
1319 }
1320}
1321
1322ecb_inline void
1323free_coro_mortal (pTHX)
1324{
1325 if (ecb_expect_true (coro_mortal))
1326 {
1327 SvREFCNT_dec ((SV *)coro_mortal);
1328 coro_mortal = 0;
1329 }
1330}
1331
1332static int
1333runops_trace (pTHX)
1334{
1335 COP *oldcop = 0;
1336 int oldcxix = -2;
1337
1338 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1339 {
1340 PERL_ASYNC_CHECK ();
1341
1342 if (cctx_current->flags & CC_TRACE_ALL)
1343 {
1344 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1345 {
1346 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1347 SV **bot, **top;
1348 AV *av = newAV (); /* return values */
1349 SV **cb;
1350 dSP;
1351
1352 GV *gv = CvGV (cx->blk_sub.cv);
1353 SV *fullname = sv_2mortal (newSV (0));
1354 if (isGV (gv))
1355 gv_efullname3 (fullname, gv, 0);
1356
1357 bot = PL_stack_base + cx->blk_oldsp + 1;
1358 top = cx->blk_gimme == G_ARRAY ? SP + 1
1359 : cx->blk_gimme == G_SCALAR ? bot + 1
1360 : bot;
1361
1362 av_extend (av, top - bot);
1363 while (bot < top)
1364 av_push (av, SvREFCNT_inc_NN (*bot++));
1365
1366 PL_runops = RUNOPS_DEFAULT;
1367 ENTER;
1368 SAVETMPS;
1369 EXTEND (SP, 3);
1370 PUSHMARK (SP);
1371 PUSHs (&PL_sv_no);
1372 PUSHs (fullname);
1373 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1374 PUTBACK;
1375 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1376 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1377 SPAGAIN;
1378 FREETMPS;
1379 LEAVE;
1380 PL_runops = runops_trace;
1381 }
1382
1383 if (oldcop != PL_curcop)
1384 {
1385 oldcop = PL_curcop;
1386
1387 if (PL_curcop != &PL_compiling)
1388 {
1389 SV **cb;
1390
1391 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1392 {
1393 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1394
1395 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1396 {
1397 dSP;
1398 GV *gv = CvGV (cx->blk_sub.cv);
1399 SV *fullname = sv_2mortal (newSV (0));
1400
1401 if (isGV (gv))
1402 gv_efullname3 (fullname, gv, 0);
1403
1404 PL_runops = RUNOPS_DEFAULT;
1405 ENTER;
1406 SAVETMPS;
1407 EXTEND (SP, 3);
1408 PUSHMARK (SP);
1409 PUSHs (&PL_sv_yes);
1410 PUSHs (fullname);
1411 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1412 PUTBACK;
1413 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1414 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1415 SPAGAIN;
1416 FREETMPS;
1417 LEAVE;
1418 PL_runops = runops_trace;
1419 }
1420
1421 oldcxix = cxstack_ix;
1422 }
1423
1424 if (cctx_current->flags & CC_TRACE_LINE)
1425 {
1426 dSP;
1427
1428 PL_runops = RUNOPS_DEFAULT;
1429 ENTER;
1430 SAVETMPS;
1431 EXTEND (SP, 3);
1432 PL_runops = RUNOPS_DEFAULT;
1433 PUSHMARK (SP);
1434 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1435 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1436 PUTBACK;
1437 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1438 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1439 SPAGAIN;
1440 FREETMPS;
1441 LEAVE;
1442 PL_runops = runops_trace;
1443 }
1444 }
1445 }
1446 }
1447 }
1448
1449 TAINT_NOT;
1450 return 0;
1451}
1452
1453static struct CoroSLF cctx_ssl_frame;
1454
1455static void
1456slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1457{
1458 ta->prev = 0;
1459}
1460
1461static int
1462slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1463{
1464 *frame = cctx_ssl_frame;
1465
1466 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1467}
1468
1469/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1470static void ecb_noinline
1471cctx_prepare (pTHX)
1472{
1473 PL_top_env = &PL_start_env;
1474
1475 if (cctx_current->flags & CC_TRACE)
1476 PL_runops = runops_trace;
1477
1478 /* we already must be executing an SLF op, there is no other valid way
1479 * that can lead to creation of a new cctx */
1480 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1481 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1482
1483 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1484 cctx_ssl_frame = slf_frame;
1485
1486 slf_frame.prepare = slf_prepare_set_stacklevel;
1487 slf_frame.check = slf_check_set_stacklevel;
1488}
1489
1490/* the tail of transfer: execute stuff we can only do after a transfer */
1491ecb_inline void
1492transfer_tail (pTHX)
1493{
1494 free_coro_mortal (aTHX);
1495}
1496
1497/* try to exit the same way perl's main function would do */
1498/* we do not bother resetting the environment or other things *7
1499/* that are not, uhm, essential */
1500/* this obviously also doesn't work when perl is embedded */
1501static void ecb_noinline ecb_cold
1502perlish_exit (pTHX)
1503{
1504 int exitstatus = perl_destruct (PL_curinterp);
1505 perl_free (PL_curinterp);
1506 exit (exitstatus);
1507}
1508
1509/*
1510 * this is a _very_ stripped down perl interpreter ;)
1511 */
1512static void
1513cctx_run (void *arg)
1514{
1515#ifdef USE_ITHREADS
1516# if CORO_PTHREAD
1517 PERL_SET_CONTEXT (coro_thx);
1518# endif
1519#endif
1520 {
1521 dTHX;
1522
1523 /* normally we would need to skip the entersub here */
1524 /* not doing so will re-execute it, which is exactly what we want */
1525 /* PL_nop = PL_nop->op_next */
1526
1527 /* inject a fake subroutine call to cctx_init */
1528 cctx_prepare (aTHX);
1529
1530 /* cctx_run is the alternative tail of transfer() */
1531 transfer_tail (aTHX);
1532
1533 /* somebody or something will hit me for both perl_run and PL_restartop */
1534 PL_restartop = PL_op;
1535 perl_run (PL_curinterp);
1536 /*
1537 * Unfortunately, there is no way to get at the return values of the
1538 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1539 * runtime errors here, as this is just a random interpreter, not a thread.
1540 */
1541
1542 /*
1543 * If perl-run returns we assume exit() was being called or the coro
1544 * fell off the end, which seems to be the only valid (non-bug)
1545 * reason for perl_run to return. We try to mimic whatever perl is normally
1546 * doing in that case. YMMV.
1547 */
1548 perlish_exit (aTHX);
1549 }
1550}
1551
1552static coro_cctx *
1553cctx_new (void)
1554{
1555 coro_cctx *cctx;
1556
1557 ++cctx_count;
1558 New (0, cctx, 1, coro_cctx);
1559
1560 cctx->gen = cctx_gen;
1561 cctx->flags = 0;
1562 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1563
1564 return cctx;
1565}
1566
1567/* create a new cctx only suitable as source */
1568static coro_cctx *
1569cctx_new_empty (void)
1570{
1571 coro_cctx *cctx = cctx_new ();
1572
1573 cctx->stack.sptr = 0;
1574 coro_create (&cctx->cctx, 0, 0, 0, 0);
1575
1576 return cctx;
1577}
1578
1579/* create a new cctx suitable as destination/running a perl interpreter */
1580static coro_cctx *
1581cctx_new_run (void)
1582{
1583 coro_cctx *cctx = cctx_new ();
1584
1585 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1586 {
1587 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1588 _exit (EXIT_FAILURE);
1589 }
1590
1591 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1592
1593 return cctx;
1594}
1595
1596static void
1597cctx_destroy (coro_cctx *cctx)
1598{
1599 if (!cctx)
1600 return;
1601
1602 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1603
1604 --cctx_count;
1605 coro_destroy (&cctx->cctx);
1606
1607 coro_stack_free (&cctx->stack);
1608
1609 Safefree (cctx);
1610}
1611
1612/* wether this cctx should be destructed */
1613#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1614
1615static coro_cctx *
1616cctx_get (pTHX)
1617{
1618 while (ecb_expect_true (cctx_first))
1619 {
1620 coro_cctx *cctx = cctx_first;
1621 cctx_first = cctx->next;
1622 --cctx_idle;
1623
1624 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1625 return cctx;
1626
1627 cctx_destroy (cctx);
1628 }
1629
1630 return cctx_new_run ();
1631}
1632
1633static void
1634cctx_put (coro_cctx *cctx)
1635{
1636 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1637
1638 /* free another cctx if overlimit */
1639 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1640 {
1641 coro_cctx *first = cctx_first;
1642 cctx_first = first->next;
1643 --cctx_idle;
1644
1645 cctx_destroy (first);
1646 }
1647
1648 ++cctx_idle;
1649 cctx->next = cctx_first;
1650 cctx_first = cctx;
1651}
1652
1653/** coroutine switching *****************************************************/
1654
1655static void
1656transfer_check (pTHX_ struct coro *prev, struct coro *next)
1657{
1658 /* TODO: throwing up here is considered harmful */
1659
1660 if (ecb_expect_true (prev != next))
1661 {
1662 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1663 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1664
1665 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1666 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1667
1668#if !PERL_VERSION_ATLEAST (5,10,0)
1669 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1670 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1671#endif
1672 }
1673}
1674
1675/* always use the TRANSFER macro */
1676static void ecb_noinline /* noinline so we have a fixed stackframe */
1677transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1678{
1679 dSTACKLEVEL;
1680
1681 /* sometimes transfer is only called to set idle_sp */
1682 if (ecb_expect_false (!prev))
1683 {
1684 cctx_current->idle_sp = STACKLEVEL;
1685 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1686 }
1687 else if (ecb_expect_true (prev != next))
1688 {
1689 coro_cctx *cctx_prev;
1690
1691 if (ecb_expect_false (prev->flags & CF_NEW))
1692 {
1693 /* create a new empty/source context */
1694 prev->flags &= ~CF_NEW;
1695 prev->flags |= CF_RUNNING;
1696 }
1697
1698 prev->flags &= ~CF_RUNNING;
1699 next->flags |= CF_RUNNING;
1700
1701 /* first get rid of the old state */
1702 save_perl (aTHX_ prev);
1703
1704 if (ecb_expect_false (next->flags & CF_NEW))
1705 {
1706 /* need to start coroutine */
1707 next->flags &= ~CF_NEW;
1708 /* setup coroutine call */
1709 init_perl (aTHX_ next);
1710 }
1711 else
1712 load_perl (aTHX_ next);
1713
1714 /* possibly untie and reuse the cctx */
1715 if (ecb_expect_true (
1716 cctx_current->idle_sp == STACKLEVEL
1717 && !(cctx_current->flags & CC_TRACE)
1718 && !force_cctx
1719 ))
1720 {
1721 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1722 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1723
1724 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1725 /* without this the next cctx_get might destroy the running cctx while still in use */
1726 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1727 if (ecb_expect_true (!next->cctx))
1728 next->cctx = cctx_get (aTHX);
1729
1730 cctx_put (cctx_current);
1731 }
1732 else
1733 prev->cctx = cctx_current;
1734
1735 ++next->usecount;
1736
1737 cctx_prev = cctx_current;
1738 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1739
1740 next->cctx = 0;
1741
1742 if (ecb_expect_false (cctx_prev != cctx_current))
1743 {
1744 cctx_prev->top_env = PL_top_env;
1745 PL_top_env = cctx_current->top_env;
1746 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1747 }
1748
1749 transfer_tail (aTHX);
1750 }
1751}
1752
1753#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1754#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1755
1756/** high level stuff ********************************************************/
1757
1758/* this function is actually Coro, not Coro::State, but we call it from here */
1759/* because it is convenient - but it hasn't been declared yet for that reason */
1760static void
1761coro_call_on_destroy (pTHX_ struct coro *coro);
1762
1763static void
1764coro_state_destroy (pTHX_ struct coro *coro)
1765{
1766 if (coro->flags & CF_ZOMBIE)
1767 return;
1768
1769 slf_destroy (aTHX_ coro);
1770
1771 coro->flags |= CF_ZOMBIE;
1772
1773 if (coro->flags & CF_READY)
1774 {
1775 /* reduce nready, as destroying a ready coro effectively unreadies it */
1776 /* alternative: look through all ready queues and remove the coro */
1777 --coro_nready;
1778 }
1779 else
1780 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1781
1782 if (coro->next) coro->next->prev = coro->prev;
1783 if (coro->prev) coro->prev->next = coro->next;
1784 if (coro == coro_first) coro_first = coro->next;
1785
1786 if (coro->mainstack
1787 && coro->mainstack != main_mainstack
1788 && coro->slot
1789 && !PL_dirty)
1790 destroy_perl (aTHX_ coro);
1791
1792 cctx_destroy (coro->cctx);
1793 SvREFCNT_dec (coro->startcv);
1794 SvREFCNT_dec (coro->args);
1795 SvREFCNT_dec (coro->swap_sv);
1796 SvREFCNT_dec (CORO_THROW);
1797
1798 coro_call_on_destroy (aTHX_ coro);
1799
1800 /* more destruction mayhem in coro_state_free */
1801}
1802
1803static int
1804coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1805{
1806 struct coro *coro = (struct coro *)mg->mg_ptr;
1807 mg->mg_ptr = 0;
1808
1809 coro_state_destroy (aTHX_ coro);
1810 SvREFCNT_dec (coro->on_destroy);
1811 SvREFCNT_dec (coro->status);
1812
1813 Safefree (coro);
1814
1815 return 0;
1816}
1817
1818static int ecb_cold
1819coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1820{
1821 /* called when perl clones the current process the slow way (windows process emulation) */
1822 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1823 mg->mg_ptr = 0;
1824 mg->mg_virtual = 0;
1825
1826 return 0;
1827}
1828
1829static MGVTBL coro_state_vtbl = {
1830 0, 0, 0, 0,
1831 coro_state_free,
1832 0,
1833#ifdef MGf_DUP
1834 coro_state_dup,
1835#else
1836# define MGf_DUP 0
1837#endif
1838};
1839
1840static void
1841prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1842{
1843 ta->prev = SvSTATE (prev_sv);
1844 ta->next = SvSTATE (next_sv);
1845 TRANSFER_CHECK (*ta);
1846}
1847
1848static void
1849api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1850{
1851 struct coro_transfer_args ta;
1852
1853 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1854 TRANSFER (ta, 1);
1855}
1856
1857/** Coro ********************************************************************/
1858
1859ecb_inline void
1860coro_enq (pTHX_ struct coro *coro)
1861{
1862 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1863
1864 SvREFCNT_inc_NN (coro->hv);
1865
1866 coro->next_ready = 0;
1867 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1868 ready [1] = coro;
1869}
1870
1871ecb_inline struct coro *
1872coro_deq (pTHX)
1873{
1874 int prio;
1875
1876 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1877 {
1878 struct coro **ready = coro_ready [prio];
1879
1880 if (ready [0])
1881 {
1882 struct coro *coro = ready [0];
1883 ready [0] = coro->next_ready;
1884 return coro;
1885 }
1886 }
1887
1888 return 0;
1889}
1890
1891static void
1892invoke_sv_ready_hook_helper (void)
1893{
650 dTHX; 1894 dTHX;
651 dSP; 1895 dSP;
652 Coro__State ctx = (Coro__State)arg;
653 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654 1896
655 coro_init_stacks (aTHX); 1897 ENTER;
656 /*PL_curcop = 0;*/ 1898 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 1899
661 SPAGAIN;
662
663 if (ctx->stack)
664 {
665 ctx->cursp = 0;
666
667 PUSHMARK(SP); 1900 PUSHMARK (SP);
668 PUTBACK; 1901 PUTBACK;
669 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1902 call_sv (coro_readyhook, G_VOID | G_DISCARD);
670 1903
671 if (SvTRUE (ERRSV)) 1904 FREETMPS;
672 croak (NULL); 1905 LEAVE;
673 else 1906}
674 croak ("FATAL: CCTXT coroutine returned!"); 1907
1908static int
1909api_ready (pTHX_ SV *coro_sv)
1910{
1911 struct coro *coro = SvSTATE (coro_sv);
1912
1913 if (coro->flags & CF_READY)
1914 return 0;
1915
1916 coro->flags |= CF_READY;
1917
1918 coro_enq (aTHX_ coro);
1919
1920 if (!coro_nready++)
1921 if (coroapi.readyhook)
1922 coroapi.readyhook ();
1923
1924 return 1;
1925}
1926
1927static int
1928api_is_ready (pTHX_ SV *coro_sv)
1929{
1930 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1931}
1932
1933/* expects to own a reference to next->hv */
1934ecb_inline void
1935prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1936{
1937 SV *prev_sv = SvRV (coro_current);
1938
1939 ta->prev = SvSTATE_hv (prev_sv);
1940 ta->next = next;
1941
1942 TRANSFER_CHECK (*ta);
1943
1944 SvRV_set (coro_current, (SV *)next->hv);
1945
1946 free_coro_mortal (aTHX);
1947 coro_mortal = prev_sv;
1948}
1949
1950static void
1951prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1952{
1953 for (;;)
675 } 1954 {
676 else 1955 struct coro *next = coro_deq (aTHX);
677 {
678 UNOP myop;
679 1956
680 PL_op = (OP *)&myop; 1957 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 { 1958 {
731 LOCK; 1959 /* cannot transfer to destroyed coros, skip and look for next */
732 SAVE (prev, flags); 1960 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
733 LOAD (next); 1961 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
734 UNLOCK; 1962 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 { 1963 {
743 if (!prev->stack) 1964 next->flags &= ~CF_READY;
744 allocate_stack (prev, 0); 1965 --coro_nready;
745 else if (prev->cursp != stacklevel 1966
746 && prev->stack->usecnt > 1) 1967 prepare_schedule_to (aTHX_ ta, next);
747 { 1968 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 } 1969 }
766 else
767 next->cursp = stacklevel;
768 } 1970 }
769 else if (next->tmps_ix == -2)
770 croak ("tried to transfer to running coroutine");
771 else 1971 else
772 { 1972 {
773 LOCK; 1973 /* nothing to schedule: call the idle handler */
774 SAVE (prev, -1); /* first get rid of the old state */ 1974 if (SvROK (sv_idle)
775 UNLOCK; 1975 && SvOBJECT (SvRV (sv_idle)))
776
777 if (flags & TRANSFER_SAVE_CCTXT)
778 { 1976 {
779 if (!prev->stack) 1977 if (SvRV (sv_idle) == SvRV (coro_current))
780 allocate_stack (prev, 0);
781
782 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783 { 1978 {
784 PL_top_env = &next->start_env; 1979 require_pv ("Carp");
785 1980
786 setup_coro (next); 1981 {
787 next->cursp = stacklevel; 1982 dSP;
788 1983
789 prev->stack->refcnt++; 1984 ENTER;
790 prev->stack->usecnt++; 1985 SAVETMPS;
791 next->stack = prev->stack; 1986
792 next->gencnt = prev->gencnt; 1987 PUSHMARK (SP);
1988 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1989 PUTBACK;
1990 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1991
1992 FREETMPS;
1993 LEAVE;
1994 }
793 } 1995 }
794 else 1996
795 { 1997 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
796 assert (!next->stack); 1998 api_ready (aTHX_ SvRV (sv_idle));
797 allocate_stack (next, 1); 1999 --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 } 2000 }
806 else 2001 else
807 { 2002 {
808 setup_coro (next); 2003 /* TODO: deprecated, remove, cannot work reliably *//*D*/
809 next->cursp = stacklevel; 2004 dSP;
2005
2006 ENTER;
2007 SAVETMPS;
2008
2009 PUSHMARK (SP);
2010 PUTBACK;
2011 call_sv (sv_idle, G_VOID | G_DISCARD);
2012
2013 FREETMPS;
2014 LEAVE;
810 } 2015 }
811 } 2016 }
812 } 2017 }
2018}
813 2019
814 LOCK; 2020ecb_inline void
2021prepare_cede (pTHX_ struct coro_transfer_args *ta)
2022{
2023 api_ready (aTHX_ coro_current);
2024 prepare_schedule (aTHX_ ta);
2025}
2026
2027ecb_inline void
2028prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2029{
2030 SV *prev = SvRV (coro_current);
2031
815 if (coro_mortal) 2032 if (coro_nready)
816 {
817 SvREFCNT_dec (coro_mortal);
818 coro_mortal = 0;
819 } 2033 {
820 UNLOCK; 2034 prepare_schedule (aTHX_ ta);
2035 api_ready (aTHX_ prev);
2036 }
2037 else
2038 prepare_nop (aTHX_ ta);
821} 2039}
822 2040
823#define SV_CORO(sv,func) \ 2041static void
824 do { \ 2042api_schedule (pTHX)
825 if (SvROK (sv)) \ 2043{
826 sv = SvRV (sv); \ 2044 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 2045
844#define SvSTATE(sv) (struct coro *)SvIV (sv) 2046 prepare_schedule (aTHX_ &ta);
2047 TRANSFER (ta, 1);
2048}
845 2049
2050static void
2051api_schedule_to (pTHX_ SV *coro_sv)
2052{
2053 struct coro_transfer_args ta;
2054 struct coro *next = SvSTATE (coro_sv);
2055
2056 SvREFCNT_inc_NN (coro_sv);
2057 prepare_schedule_to (aTHX_ &ta, next);
2058}
2059
846static void 2060static int
847api_transfer(pTHX_ SV *prev, SV *next, int flags) 2061api_cede (pTHX)
848{ 2062{
849 SV_CORO (prev, "Coro::transfer"); 2063 struct coro_transfer_args ta;
850 SV_CORO (next, "Coro::transfer");
851 2064
852 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2065 prepare_cede (aTHX_ &ta);
853}
854 2066
2067 if (ecb_expect_true (ta.prev != ta.next))
2068 {
2069 TRANSFER (ta, 1);
2070 return 1;
2071 }
2072 else
2073 return 0;
2074}
2075
2076static int
2077api_cede_notself (pTHX)
2078{
2079 if (coro_nready)
2080 {
2081 struct coro_transfer_args ta;
2082
2083 prepare_cede_notself (aTHX_ &ta);
2084 TRANSFER (ta, 1);
2085 return 1;
2086 }
2087 else
2088 return 0;
2089}
2090
2091static void
2092api_trace (pTHX_ SV *coro_sv, int flags)
2093{
2094 struct coro *coro = SvSTATE (coro_sv);
2095
2096 if (coro->flags & CF_RUNNING)
2097 croak ("cannot enable tracing on a running coroutine, caught");
2098
2099 if (flags & CC_TRACE)
2100 {
2101 if (!coro->cctx)
2102 coro->cctx = cctx_new_run ();
2103 else if (!(coro->cctx->flags & CC_TRACE))
2104 croak ("cannot enable tracing on coroutine with custom stack, caught");
2105
2106 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2107 }
2108 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2109 {
2110 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2111
2112 if (coro->flags & CF_RUNNING)
2113 PL_runops = RUNOPS_DEFAULT;
2114 else
2115 coro->slot->runops = RUNOPS_DEFAULT;
2116 }
2117}
2118
2119static void
2120coro_push_av (pTHX_ AV *av, I32 gimme_v)
2121{
2122 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2123 {
2124 dSP;
2125
2126 if (gimme_v == G_SCALAR)
2127 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2128 else
2129 {
2130 int i;
2131 EXTEND (SP, AvFILLp (av) + 1);
2132
2133 for (i = 0; i <= AvFILLp (av); ++i)
2134 PUSHs (AvARRAY (av)[i]);
2135 }
2136
2137 PUTBACK;
2138 }
2139}
2140
2141static void
2142coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2143{
2144 if (!coro->on_destroy)
2145 coro->on_destroy = newAV ();
2146
2147 av_push (coro->on_destroy, cb);
2148}
2149
2150static void
2151slf_destroy_join (pTHX_ struct CoroSLF *frame)
2152{
2153 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2154}
2155
2156static int
2157slf_check_join (pTHX_ struct CoroSLF *frame)
2158{
2159 struct coro *coro = (struct coro *)frame->data;
2160
2161 if (!coro->status)
2162 return 1;
2163
2164 frame->destroy = 0;
2165
2166 coro_push_av (aTHX_ coro->status, GIMME_V);
2167
2168 SvREFCNT_dec ((SV *)coro->hv);
2169
2170 return 0;
2171}
2172
2173static void
2174slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2177
2178 if (items > 1)
2179 croak ("join called with too many arguments");
2180
2181 if (coro->status)
2182 frame->prepare = prepare_nop;
2183 else
2184 {
2185 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2186 frame->prepare = prepare_schedule;
2187 }
2188
2189 frame->check = slf_check_join;
2190 frame->destroy = slf_destroy_join;
2191 frame->data = (void *)coro;
2192 SvREFCNT_inc (coro->hv);
2193}
2194
2195static void
2196coro_call_on_destroy (pTHX_ struct coro *coro)
2197{
2198 AV *od = coro->on_destroy;
2199
2200 if (!od)
2201 return;
2202
2203 coro->on_destroy = 0;
2204 sv_2mortal ((SV *)od);
2205
2206 while (AvFILLp (od) >= 0)
2207 {
2208 SV *cb = sv_2mortal (av_pop (od));
2209
2210 /* coro hv's (and only hv's at the moment) are supported as well */
2211 if (SvSTATEhv_p (aTHX_ cb))
2212 api_ready (aTHX_ cb);
2213 else
2214 {
2215 dSP; /* don't disturb outer sp */
2216 PUSHMARK (SP);
2217
2218 if (coro->status)
2219 {
2220 PUTBACK;
2221 coro_push_av (aTHX_ coro->status, G_ARRAY);
2222 SPAGAIN;
2223 }
2224
2225 PUTBACK;
2226 call_sv (cb, G_VOID | G_DISCARD);
2227 }
2228 }
2229}
2230
2231static void
2232coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2233{
2234 AV *av;
2235
2236 if (coro->status)
2237 {
2238 av = coro->status;
2239 av_clear (av);
2240 }
2241 else
2242 av = coro->status = newAV ();
2243
2244 /* items are actually not so common, so optimise for this case */
2245 if (items)
2246 {
2247 int i;
2248
2249 av_extend (av, items - 1);
2250
2251 for (i = 0; i < items; ++i)
2252 av_push (av, SvREFCNT_inc_NN (arg [i]));
2253 }
2254}
2255
2256static void
2257slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2258{
2259 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2260 api_ready (aTHX_ sv_manager);
2261
2262 frame->prepare = prepare_schedule;
2263 frame->check = slf_check_repeat;
2264
2265 /* as a minor optimisation, we could unwind all stacks here */
2266 /* but that puts extra pressure on pp_slf, and is not worth much */
2267 /*coro_unwind_stacks (aTHX);*/
2268}
2269
2270static void
2271slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2272{
2273 HV *coro_hv = (HV *)SvRV (coro_current);
2274
2275 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2276 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2277}
2278
2279static void
2280slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2281{
2282 HV *coro_hv;
2283 struct coro *coro;
2284
2285 if (items <= 0)
2286 croak ("Coro::cancel called without coro object,");
2287
2288 coro = SvSTATE (arg [0]);
2289 coro_hv = coro->hv;
2290
2291 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2292
2293 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2294 {
2295 /* coro currently busy cancelling something, so just notify it */
2296 coro->slf_frame.data = (void *)coro;
2297
2298 frame->prepare = prepare_nop;
2299 frame->check = slf_check_nop;
2300 }
2301 else if (coro_hv == (HV *)SvRV (coro_current))
2302 {
2303 /* cancelling the current coro is allowed, and equals terminate */
2304 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2305 }
2306 else
2307 {
2308 struct coro *self = SvSTATE_current;
2309
2310 if (!self)
2311 croak ("Coro::cancel called outside of thread content,");
2312
2313 /* otherwise we cancel directly, purely for speed reasons
2314 * unfortunately, this requires some magic trickery, as
2315 * somebody else could cancel us, so we have to fight the cancellation.
2316 * this is ugly, and hopefully fully worth the extra speed.
2317 * besides, I can't get the slow-but-safe version working...
2318 */
2319 slf_frame.data = 0;
2320 self->flags |= CF_NOCANCEL;
2321 coro_state_destroy (aTHX_ coro);
2322 self->flags &= ~CF_NOCANCEL;
2323
2324 if (slf_frame.data)
2325 {
2326 /* while we were busy we have been cancelled, so terminate */
2327 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2328 }
2329 else
2330 {
2331 frame->prepare = prepare_nop;
2332 frame->check = slf_check_nop;
2333 }
2334 }
2335}
2336
2337static int
2338slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2339{
2340 frame->prepare = 0;
2341 coro_unwind_stacks (aTHX);
2342
2343 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2344
2345 return 1;
2346}
2347
2348static int
2349safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2350{
2351 if (coro->cctx)
2352 croak ("coro inside C callback, unable to cancel at this time, caught");
2353
2354 if (coro->flags & CF_NEW)
2355 {
2356 coro_set_status (aTHX_ coro, arg, items);
2357 coro_state_destroy (aTHX_ coro);
2358 }
2359 else
2360 {
2361 if (!coro->slf_frame.prepare)
2362 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2363
2364 slf_destroy (aTHX_ coro);
2365
2366 coro_set_status (aTHX_ coro, arg, items);
2367 coro->slf_frame.prepare = prepare_nop;
2368 coro->slf_frame.check = slf_check_safe_cancel;
2369
2370 api_ready (aTHX_ (SV *)coro->hv);
2371 }
2372
2373 return 1;
2374}
2375
855/** Coro ********************************************************************/ 2376/*****************************************************************************/
2377/* async pool handler */
856 2378
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 2379static int
870coro_enq (pTHX_ SV *sv) 2380slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
871{ 2381{
872 SV **xprio; 2382 HV *hv = (HV *)SvRV (coro_current);
873 int prio; 2383 struct coro *coro = (struct coro *)frame->data;
874 2384
2385 if (!coro->invoke_cb)
2386 return 1; /* loop till we have invoke */
2387 else
2388 {
2389 hv_store (hv, "desc", sizeof ("desc") - 1,
2390 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2391
2392 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2393
2394 {
2395 dSP;
2396 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2397 PUTBACK;
2398 }
2399
2400 SvREFCNT_dec (GvAV (PL_defgv));
2401 GvAV (PL_defgv) = coro->invoke_av;
2402 coro->invoke_av = 0;
2403
2404 return 0;
2405 }
2406}
2407
2408static void
2409slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2410{
2411 HV *hv = (HV *)SvRV (coro_current);
2412 struct coro *coro = SvSTATE_hv ((SV *)hv);
2413
2414 if (ecb_expect_true (coro->saved_deffh))
2415 {
2416 /* subsequent iteration */
2417 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2418 coro->saved_deffh = 0;
2419
2420 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2421 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2422 {
2423 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2424 return;
2425 }
2426 else
2427 {
2428 av_clear (GvAV (PL_defgv));
2429 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2430
2431 if (ecb_expect_false (coro->swap_sv))
2432 {
2433 swap_svs_leave (coro);
2434 SvREFCNT_dec_NN (coro->swap_sv);
2435 coro->swap_sv = 0;
2436 }
2437
2438 coro->prio = 0;
2439
2440 if (coro->cctx && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2441 api_trace (aTHX_ coro_current, 0);
2442
2443 frame->prepare = prepare_schedule;
2444 av_push (av_async_pool, SvREFCNT_inc (hv));
2445 }
2446 }
2447 else
2448 {
2449 /* first iteration, simply fall through */
2450 frame->prepare = prepare_nop;
2451 }
2452
2453 frame->check = slf_check_pool_handler;
2454 frame->data = (void *)coro;
2455}
2456
2457/*****************************************************************************/
2458/* rouse callback */
2459
2460#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2461
2462static void
2463coro_rouse_callback (pTHX_ CV *cv)
2464{
2465 dXSARGS;
2466 SV *data = (SV *)S_GENSUB_ARG;
2467
875 if (SvTYPE (sv) != SVt_PVHV) 2468 if (SvTYPE (SvRV (data)) != SVt_PVAV)
876 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2469 {
2470 /* first call, set args */
2471 SV *coro = SvRV (data);
2472 AV *av = newAV ();
877 2473
878 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2474 SvRV_set (data, (SV *)av);
879 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880 2475
881 prio = prio > PRIO_MAX ? PRIO_MAX 2476 /* better take a full copy of the arguments */
882 : prio < PRIO_MIN ? PRIO_MIN 2477 while (items--)
883 : prio; 2478 av_store (av, items, newSVsv (ST (items)));
884 2479
885 av_push (coro_ready [prio - PRIO_MIN], sv); 2480 api_ready (aTHX_ coro);
886 coro_nready++; 2481 SvREFCNT_dec (coro);
2482 }
2483
2484 XSRETURN_EMPTY;
2485}
2486
2487static int
2488slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2489{
2490 SV *data = (SV *)frame->data;
2491
2492 if (CORO_THROW)
2493 return 0;
2494
2495 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2496 return 1;
2497
2498 /* now push all results on the stack */
2499 {
2500 dSP;
2501 AV *av = (AV *)SvRV (data);
2502 int i;
2503
2504 EXTEND (SP, AvFILLp (av) + 1);
2505 for (i = 0; i <= AvFILLp (av); ++i)
2506 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2507
2508 /* we have stolen the elements, so set length to zero and free */
2509 AvFILLp (av) = -1;
2510 av_undef (av);
2511
2512 PUTBACK;
2513 }
2514
2515 return 0;
2516}
2517
2518static void
2519slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 SV *cb;
2522
2523 if (items)
2524 cb = arg [0];
2525 else
2526 {
2527 struct coro *coro = SvSTATE_current;
2528
2529 if (!coro->rouse_cb)
2530 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2531
2532 cb = sv_2mortal (coro->rouse_cb);
2533 coro->rouse_cb = 0;
2534 }
2535
2536 if (!SvROK (cb)
2537 || SvTYPE (SvRV (cb)) != SVt_PVCV
2538 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2539 croak ("Coro::rouse_wait called with illegal callback argument,");
2540
2541 {
2542 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2543 SV *data = (SV *)S_GENSUB_ARG;
2544
2545 frame->data = (void *)data;
2546 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2547 frame->check = slf_check_rouse_wait;
2548 }
887} 2549}
888 2550
889static SV * 2551static SV *
890coro_deq (pTHX_ int min_prio) 2552coro_new_rouse_cb (pTHX)
891{ 2553{
892 int prio = PRIO_MAX - PRIO_MIN; 2554 HV *hv = (HV *)SvRV (coro_current);
2555 struct coro *coro = SvSTATE_hv (hv);
2556 SV *data = newRV_inc ((SV *)hv);
2557 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
893 2558
894 min_prio -= PRIO_MIN; 2559 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
895 if (min_prio < 0) 2560 SvREFCNT_dec (data); /* magicext increases the refcount */
896 min_prio = 0;
897 2561
898 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2562 SvREFCNT_dec (coro->rouse_cb);
899 if (av_len (coro_ready[prio]) >= 0) 2563 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2564
2565 return cb;
2566}
2567
2568/*****************************************************************************/
2569/* schedule-like-function opcode (SLF) */
2570
2571static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2572static const CV *slf_cv;
2573static SV **slf_argv;
2574static int slf_argc, slf_arga; /* count, allocated */
2575static I32 slf_ax; /* top of stack, for restore */
2576
2577/* this restores the stack in the case we patched the entersub, to */
2578/* recreate the stack frame as perl will on following calls */
2579/* since entersub cleared the stack */
2580static OP *
2581pp_restore (pTHX)
2582{
2583 int i;
2584 SV **SP = PL_stack_base + slf_ax;
2585
2586 PUSHMARK (SP);
2587
2588 EXTEND (SP, slf_argc + 1);
2589
2590 for (i = 0; i < slf_argc; ++i)
2591 PUSHs (sv_2mortal (slf_argv [i]));
2592
2593 PUSHs ((SV *)CvGV (slf_cv));
2594
2595 RETURNOP (slf_restore.op_first);
2596}
2597
2598static void
2599slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2600{
2601 SV **arg = (SV **)slf_frame.data;
2602
2603 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2604}
2605
2606static void
2607slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2608{
2609 if (items != 2)
2610 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2611
2612 frame->prepare = slf_prepare_transfer;
2613 frame->check = slf_check_nop;
2614 frame->data = (void *)arg; /* let's hope it will stay valid */
2615}
2616
2617static void
2618slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 frame->prepare = prepare_schedule;
2621 frame->check = slf_check_nop;
2622}
2623
2624static void
2625slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2626{
2627 struct coro *next = (struct coro *)slf_frame.data;
2628
2629 SvREFCNT_inc_NN (next->hv);
2630 prepare_schedule_to (aTHX_ ta, next);
2631}
2632
2633static void
2634slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2635{
2636 if (!items)
2637 croak ("Coro::schedule_to expects a coroutine argument, caught");
2638
2639 frame->data = (void *)SvSTATE (arg [0]);
2640 frame->prepare = slf_prepare_schedule_to;
2641 frame->check = slf_check_nop;
2642}
2643
2644static void
2645slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2646{
2647 api_ready (aTHX_ SvRV (coro_current));
2648
2649 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2650}
2651
2652static void
2653slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2654{
2655 frame->prepare = prepare_cede;
2656 frame->check = slf_check_nop;
2657}
2658
2659static void
2660slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2661{
2662 frame->prepare = prepare_cede_notself;
2663 frame->check = slf_check_nop;
2664}
2665
2666/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2667static void
2668slf_destroy (pTHX_ struct coro *coro)
2669{
2670 struct CoroSLF frame = coro->slf_frame;
2671
2672 /*
2673 * The on_destroy below most likely is from an SLF call.
2674 * Since by definition the SLF call will not finish when we destroy
2675 * the coro, we will have to force-finish it here, otherwise
2676 * cleanup functions cannot call SLF functions.
2677 */
2678 coro->slf_frame.prepare = 0;
2679
2680 /* this callback is reserved for slf functions needing to do cleanup */
2681 if (frame.destroy && frame.prepare && !PL_dirty)
2682 frame.destroy (aTHX_ &frame);
2683}
2684
2685/*
2686 * these not obviously related functions are all rolled into one
2687 * function to increase chances that they all will call transfer with the same
2688 * stack offset
2689 * SLF stands for "schedule-like-function".
2690 */
2691static OP *
2692pp_slf (pTHX)
2693{
2694 I32 checkmark; /* mark SP to see how many elements check has pushed */
2695
2696 /* set up the slf frame, unless it has already been set-up */
2697 /* the latter happens when a new coro has been started */
2698 /* or when a new cctx was attached to an existing coroutine */
2699 if (ecb_expect_true (!slf_frame.prepare))
2700 {
2701 /* first iteration */
2702 dSP;
2703 SV **arg = PL_stack_base + TOPMARK + 1;
2704 int items = SP - arg; /* args without function object */
2705 SV *gv = *sp;
2706
2707 /* do a quick consistency check on the "function" object, and if it isn't */
2708 /* for us, divert to the real entersub */
2709 if (SvTYPE (gv) != SVt_PVGV
2710 || !GvCV (gv)
2711 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2712 return PL_ppaddr[OP_ENTERSUB](aTHX);
2713
2714 if (!(PL_op->op_flags & OPf_STACKED))
2715 {
2716 /* ampersand-form of call, use @_ instead of stack */
2717 AV *av = GvAV (PL_defgv);
2718 arg = AvARRAY (av);
2719 items = AvFILLp (av) + 1;
2720 }
2721
2722 /* now call the init function, which needs to set up slf_frame */
2723 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2724 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2725
2726 /* pop args */
2727 SP = PL_stack_base + POPMARK;
2728
2729 PUTBACK;
2730 }
2731
2732 /* now that we have a slf_frame, interpret it! */
2733 /* we use a callback system not to make the code needlessly */
2734 /* complicated, but so we can run multiple perl coros from one cctx */
2735
2736 do
2737 {
2738 struct coro_transfer_args ta;
2739
2740 slf_frame.prepare (aTHX_ &ta);
2741 TRANSFER (ta, 0);
2742
2743 checkmark = PL_stack_sp - PL_stack_base;
2744 }
2745 while (slf_frame.check (aTHX_ &slf_frame));
2746
2747 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2748
2749 /* exception handling */
2750 if (ecb_expect_false (CORO_THROW))
2751 {
2752 SV *exception = sv_2mortal (CORO_THROW);
2753
2754 CORO_THROW = 0;
2755 sv_setsv (ERRSV, exception);
2756 croak (0);
2757 }
2758
2759 /* return value handling - mostly like entersub */
2760 /* make sure we put something on the stack in scalar context */
2761 if (GIMME_V == G_SCALAR
2762 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2763 {
2764 dSP;
2765 SV **bot = PL_stack_base + checkmark;
2766
2767 if (sp == bot) /* too few, push undef */
2768 bot [1] = &PL_sv_undef;
2769 else /* too many, take last one */
2770 bot [1] = *sp;
2771
2772 SP = bot + 1;
2773
2774 PUTBACK;
2775 }
2776
2777 return NORMAL;
2778}
2779
2780static void
2781api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2782{
2783 int i;
2784 SV **arg = PL_stack_base + ax;
2785 int items = PL_stack_sp - arg + 1;
2786
2787 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2788
2789 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2790 && PL_op->op_ppaddr != pp_slf)
2791 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2792
2793 CvFLAGS (cv) |= CVf_SLF;
2794 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2795 slf_cv = cv;
2796
2797 /* we patch the op, and then re-run the whole call */
2798 /* we have to put the same argument on the stack for this to work */
2799 /* and this will be done by pp_restore */
2800 slf_restore.op_next = (OP *)&slf_restore;
2801 slf_restore.op_type = OP_CUSTOM;
2802 slf_restore.op_ppaddr = pp_restore;
2803 slf_restore.op_first = PL_op;
2804
2805 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2806
2807 if (PL_op->op_flags & OPf_STACKED)
2808 {
2809 if (items > slf_arga)
2810 {
2811 slf_arga = items;
2812 Safefree (slf_argv);
2813 New (0, slf_argv, slf_arga, SV *);
2814 }
2815
2816 slf_argc = items;
2817
2818 for (i = 0; i < items; ++i)
2819 slf_argv [i] = SvREFCNT_inc (arg [i]);
2820 }
2821 else
2822 slf_argc = 0;
2823
2824 PL_op->op_ppaddr = pp_slf;
2825 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2826
2827 PL_op = (OP *)&slf_restore;
2828}
2829
2830/*****************************************************************************/
2831/* dynamic wind */
2832
2833static void
2834on_enterleave_call (pTHX_ SV *cb)
2835{
2836 dSP;
2837
2838 PUSHSTACK;
2839
2840 PUSHMARK (SP);
2841 PUTBACK;
2842 call_sv (cb, G_VOID | G_DISCARD);
2843 SPAGAIN;
2844
2845 POPSTACK;
2846}
2847
2848static SV *
2849coro_avp_pop_and_free (pTHX_ AV **avp)
2850{
2851 AV *av = *avp;
2852 SV *res = av_pop (av);
2853
2854 if (AvFILLp (av) < 0)
2855 {
2856 *avp = 0;
2857 SvREFCNT_dec (av);
2858 }
2859
2860 return res;
2861}
2862
2863static void
2864coro_pop_on_enter (pTHX_ void *coro)
2865{
2866 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2867 SvREFCNT_dec (cb);
2868}
2869
2870static void
2871coro_pop_on_leave (pTHX_ void *coro)
2872{
2873 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2874 on_enterleave_call (aTHX_ sv_2mortal (cb));
2875}
2876
2877static void
2878enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2879{
2880 if (!hook)
2881 return;
2882
2883 if (!*avp)
2884 {
2885 *avp = newAV ();
2886 AvREAL_off (*avp);
2887 }
2888
2889 av_push (*avp, (SV *)hook);
2890 av_push (*avp, (SV *)arg);
2891}
2892
2893static void
2894enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2895{
2896 AV *av = *avp;
2897 int i;
2898
2899 if (!av)
2900 return;
2901
2902 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2903 if (AvARRAY (av)[i] == (SV *)hook)
900 { 2904 {
901 coro_nready--; 2905 if (execute)
902 return av_shift (coro_ready[prio]); 2906 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2907
2908 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2909 av_pop (av);
2910 av_pop (av);
2911 break;
903 } 2912 }
904 2913
2914 if (AvFILLp (av) >= 0)
2915 {
2916 *avp = 0;
2917 SvREFCNT_dec_NN (av);
2918 }
2919}
2920
2921static void
2922api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2923{
2924 struct coro *coro = SvSTATE (coro_sv);
2925
2926 if (SvSTATE_current == coro)
2927 if (enter)
2928 enter (aTHX_ enter_arg);
2929
2930 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2931 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2932}
2933
2934static void
2935api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2936{
2937 struct coro *coro = SvSTATE (coro_sv);
2938
2939 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2940 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2941}
2942
2943static void
2944savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2945{
2946 struct coro *coro = SvSTATE_current;
2947
2948 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2949}
2950
2951static void
2952savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2953{
2954 struct coro *coro = SvSTATE_current;
2955
2956 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2957}
2958
2959static void
2960api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2961{
2962 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2963
2964 /* this ought to be much cheaper than malloc + a single destructor call */
2965 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2966 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2967}
2968
2969/*****************************************************************************/
2970/* PerlIO::cede */
2971
2972typedef struct
2973{
2974 PerlIOBuf base;
2975 NV next, every;
2976} PerlIOCede;
2977
2978static IV ecb_cold
2979PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2980{
2981 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2982
2983 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2984 self->next = nvtime () + self->every;
2985
2986 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2987}
2988
2989static SV * ecb_cold
2990PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2991{
2992 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2993
2994 return newSVnv (self->every);
2995}
2996
2997static IV
2998PerlIOCede_flush (pTHX_ PerlIO *f)
2999{
3000 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3001 double now = nvtime ();
3002
3003 if (now >= self->next)
3004 {
3005 api_cede (aTHX);
3006 self->next = now + self->every;
3007 }
3008
3009 return PerlIOBuf_flush (aTHX_ f);
3010}
3011
3012static PerlIO_funcs PerlIO_cede =
3013{
3014 sizeof(PerlIO_funcs),
3015 "cede",
3016 sizeof(PerlIOCede),
3017 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3018 PerlIOCede_pushed,
3019 PerlIOBuf_popped,
3020 PerlIOBuf_open,
3021 PerlIOBase_binmode,
3022 PerlIOCede_getarg,
3023 PerlIOBase_fileno,
3024 PerlIOBuf_dup,
3025 PerlIOBuf_read,
3026 PerlIOBuf_unread,
3027 PerlIOBuf_write,
3028 PerlIOBuf_seek,
3029 PerlIOBuf_tell,
3030 PerlIOBuf_close,
3031 PerlIOCede_flush,
3032 PerlIOBuf_fill,
3033 PerlIOBase_eof,
3034 PerlIOBase_error,
3035 PerlIOBase_clearerr,
3036 PerlIOBase_setlinebuf,
3037 PerlIOBuf_get_base,
3038 PerlIOBuf_bufsiz,
3039 PerlIOBuf_get_ptr,
3040 PerlIOBuf_get_cnt,
3041 PerlIOBuf_set_ptrcnt,
3042};
3043
3044/*****************************************************************************/
3045/* Coro::Semaphore & Coro::Signal */
3046
3047static SV *
3048coro_waitarray_new (pTHX_ int count)
3049{
3050 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3051 AV *av = newAV ();
3052 SV **ary;
3053
3054 /* unfortunately, building manually saves memory */
3055 Newx (ary, 2, SV *);
3056 AvALLOC (av) = ary;
3057#if PERL_VERSION_ATLEAST (5,10,0)
3058 AvARRAY (av) = ary;
3059#else
3060 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3061 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3062 SvPVX ((SV *)av) = (char *)ary;
3063#endif
3064 AvMAX (av) = 1;
3065 AvFILLp (av) = 0;
3066 ary [0] = newSViv (count);
3067
3068 return newRV_noinc ((SV *)av);
3069}
3070
3071/* semaphore */
3072
3073static void
3074coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3075{
3076 SV *count_sv = AvARRAY (av)[0];
3077 IV count = SvIVX (count_sv);
3078
3079 count += adjust;
3080 SvIVX (count_sv) = count;
3081
3082 /* now wake up as many waiters as are expected to lock */
3083 while (count > 0 && AvFILLp (av) > 0)
3084 {
3085 SV *cb;
3086
3087 /* swap first two elements so we can shift a waiter */
3088 AvARRAY (av)[0] = AvARRAY (av)[1];
3089 AvARRAY (av)[1] = count_sv;
3090 cb = av_shift (av);
3091
3092 if (SvOBJECT (cb))
3093 {
3094 api_ready (aTHX_ cb);
3095 --count;
3096 }
3097 else if (SvTYPE (cb) == SVt_PVCV)
3098 {
3099 dSP;
3100 PUSHMARK (SP);
3101 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3102 PUTBACK;
3103 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3104 }
3105
3106 SvREFCNT_dec_NN (cb);
3107 }
3108}
3109
3110static void
3111coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3112{
3113 /* call $sem->adjust (0) to possibly wake up some other waiters */
3114 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3115}
3116
3117static int
3118slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
3119{
3120 AV *av = (AV *)frame->data;
3121 SV *count_sv = AvARRAY (av)[0];
3122 SV *coro_hv = SvRV (coro_current);
3123
3124 frame->destroy = 0;
3125
3126 /* if we are about to throw, don't actually acquire the lock, just throw */
3127 if (ecb_expect_false (CORO_THROW))
3128 {
3129 /* we still might be responsible for the semaphore, so wake up others */
3130 coro_semaphore_adjust (aTHX_ av, 0);
3131
3132 return 0;
3133 }
3134 else if (SvIVX (count_sv) > 0)
3135 {
3136 if (acquire)
3137 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3138 else
3139 coro_semaphore_adjust (aTHX_ av, 0);
3140
3141 return 0;
3142 }
3143 else
3144 {
3145 int i;
3146 /* if we were woken up but can't down, we look through the whole */
3147 /* waiters list and only add us if we aren't in there already */
3148 /* this avoids some degenerate memory usage cases */
3149 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3150 if (AvARRAY (av)[i] == coro_hv)
3151 return 1;
3152
3153 av_push (av, SvREFCNT_inc (coro_hv));
3154 return 1;
3155 }
3156}
3157
3158static int
3159slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3160{
3161 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3162}
3163
3164static int
3165slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3166{
3167 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3168}
3169
3170static void
3171slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3172{
3173 AV *av = (AV *)SvRV (arg [0]);
3174
3175 if (SvIVX (AvARRAY (av)[0]) > 0)
3176 {
3177 frame->data = (void *)av;
3178 frame->prepare = prepare_nop;
3179 }
3180 else
3181 {
3182 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3183
3184 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3185 frame->prepare = prepare_schedule;
3186 /* to avoid race conditions when a woken-up coro gets terminated */
3187 /* we arrange for a temporary on_destroy that calls adjust (0) */
3188 frame->destroy = coro_semaphore_destroy;
3189 }
3190}
3191
3192static void
3193slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3194{
3195 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3196 frame->check = slf_check_semaphore_down;
3197}
3198
3199static void
3200slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3201{
3202 if (items >= 2)
3203 {
3204 /* callback form */
3205 AV *av = (AV *)SvRV (arg [0]);
3206 SV *cb_cv = s_get_cv_croak (arg [1]);
3207
3208 av_push (av, SvREFCNT_inc_NN (cb_cv));
3209
3210 if (SvIVX (AvARRAY (av)[0]) > 0)
3211 coro_semaphore_adjust (aTHX_ av, 0);
3212
3213 frame->prepare = prepare_nop;
3214 frame->check = slf_check_nop;
3215 }
3216 else
3217 {
3218 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3219 frame->check = slf_check_semaphore_wait;
3220 }
3221}
3222
3223/* signal */
3224
3225static void
3226coro_signal_wake (pTHX_ AV *av, int count)
3227{
3228 SvIVX (AvARRAY (av)[0]) = 0;
3229
3230 /* now signal count waiters */
3231 while (count > 0 && AvFILLp (av) > 0)
3232 {
3233 SV *cb;
3234
3235 /* swap first two elements so we can shift a waiter */
3236 cb = AvARRAY (av)[0];
3237 AvARRAY (av)[0] = AvARRAY (av)[1];
3238 AvARRAY (av)[1] = cb;
3239
3240 cb = av_shift (av);
3241
3242 if (SvTYPE (cb) == SVt_PVCV)
3243 {
3244 dSP;
3245 PUSHMARK (SP);
3246 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3247 PUTBACK;
3248 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3249 }
3250 else
3251 {
3252 api_ready (aTHX_ cb);
3253 sv_setiv (cb, 0); /* signal waiter */
3254 }
3255
3256 SvREFCNT_dec_NN (cb);
3257
3258 --count;
3259 }
3260}
3261
3262static int
3263slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3264{
3265 /* if we are about to throw, also stop waiting */
3266 return SvROK ((SV *)frame->data) && !CORO_THROW;
3267}
3268
3269static void
3270slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3271{
3272 AV *av = (AV *)SvRV (arg [0]);
3273
3274 if (items >= 2)
3275 {
3276 SV *cb_cv = s_get_cv_croak (arg [1]);
3277 av_push (av, SvREFCNT_inc_NN (cb_cv));
3278
3279 if (SvIVX (AvARRAY (av)[0]))
3280 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3281
3282 frame->prepare = prepare_nop;
3283 frame->check = slf_check_nop;
3284 }
3285 else if (SvIVX (AvARRAY (av)[0]))
3286 {
3287 SvIVX (AvARRAY (av)[0]) = 0;
3288 frame->prepare = prepare_nop;
3289 frame->check = slf_check_nop;
3290 }
3291 else
3292 {
3293 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3294
3295 av_push (av, waiter);
3296
3297 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3298 frame->prepare = prepare_schedule;
3299 frame->check = slf_check_signal_wait;
3300 }
3301}
3302
3303/*****************************************************************************/
3304/* Coro::AIO */
3305
3306#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3307
3308/* helper storage struct */
3309struct io_state
3310{
3311 int errorno;
3312 I32 laststype; /* U16 in 5.10.0 */
3313 int laststatval;
3314 Stat_t statcache;
3315};
3316
3317static void
3318coro_aio_callback (pTHX_ CV *cv)
3319{
3320 dXSARGS;
3321 AV *state = (AV *)S_GENSUB_ARG;
3322 SV *coro = av_pop (state);
3323 SV *data_sv = newSV (sizeof (struct io_state));
3324
3325 av_extend (state, items - 1);
3326
3327 sv_upgrade (data_sv, SVt_PV);
3328 SvCUR_set (data_sv, sizeof (struct io_state));
3329 SvPOK_only (data_sv);
3330
3331 {
3332 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3333
3334 data->errorno = errno;
3335 data->laststype = PL_laststype;
3336 data->laststatval = PL_laststatval;
3337 data->statcache = PL_statcache;
3338 }
3339
3340 /* now build the result vector out of all the parameters and the data_sv */
3341 {
3342 int i;
3343
3344 for (i = 0; i < items; ++i)
3345 av_push (state, SvREFCNT_inc_NN (ST (i)));
3346 }
3347
3348 av_push (state, data_sv);
3349
3350 api_ready (aTHX_ coro);
3351 SvREFCNT_dec_NN (coro);
3352 SvREFCNT_dec_NN ((AV *)state);
3353}
3354
3355static int
3356slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3357{
3358 AV *state = (AV *)frame->data;
3359
3360 /* if we are about to throw, return early */
3361 /* this does not cancel the aio request, but at least */
3362 /* it quickly returns */
3363 if (CORO_THROW)
3364 return 0;
3365
3366 /* one element that is an RV? repeat! */
3367 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3368 return 1;
3369
3370 /* restore status */
3371 {
3372 SV *data_sv = av_pop (state);
3373 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3374
3375 errno = data->errorno;
3376 PL_laststype = data->laststype;
3377 PL_laststatval = data->laststatval;
3378 PL_statcache = data->statcache;
3379
3380 SvREFCNT_dec_NN (data_sv);
3381 }
3382
3383 /* push result values */
3384 {
3385 dSP;
3386 int i;
3387
3388 EXTEND (SP, AvFILLp (state) + 1);
3389 for (i = 0; i <= AvFILLp (state); ++i)
3390 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3391
3392 PUTBACK;
3393 }
3394
905 return 0; 3395 return 0;
906} 3396}
907 3397
908static void 3398static void
909api_ready (SV *coro) 3399slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
910{ 3400{
911 dTHX; 3401 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
912
913 if (SvROK (coro))
914 coro = SvRV (coro);
915
916 LOCK;
917 coro_enq (aTHX_ SvREFCNT_inc (coro));
918 UNLOCK;
919}
920
921static void
922api_schedule (void)
923{
924 dTHX;
925
926 SV *prev, *next;
927
928 LOCK;
929
930 prev = SvRV (GvSV (coro_current)); 3402 SV *coro_hv = SvRV (coro_current);
931 next = coro_deq (aTHX_ PRIO_MIN); 3403 struct coro *coro = SvSTATE_hv (coro_hv);
932 3404
933 if (!next) 3405 /* put our coroutine id on the state arg */
934 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3406 av_push (state, SvREFCNT_inc_NN (coro_hv));
935 3407
936 /* free this only after the transfer */ 3408 /* first see whether we have a non-zero priority and set it as AIO prio */
937 coro_mortal = prev; 3409 if (coro->prio)
938 SV_CORO (prev, "Coro::schedule"); 3410 {
3411 dSP;
939 3412
940 SvRV (GvSV (coro_current)) = next; 3413 static SV *prio_cv;
3414 static SV *prio_sv;
941 3415
942 SV_CORO (next, "Coro::schedule"); 3416 if (ecb_expect_false (!prio_cv))
3417 {
3418 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3419 prio_sv = newSViv (0);
3420 }
943 3421
944 UNLOCK; 3422 PUSHMARK (SP);
3423 sv_setiv (prio_sv, coro->prio);
3424 XPUSHs (prio_sv);
945 3425
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3426 PUTBACK;
947 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3427 call_sv (prio_cv, G_VOID | G_DISCARD);
948} 3428 }
949 3429
950static void 3430 /* now call the original request */
951api_cede (void) 3431 {
952{ 3432 dSP;
953 dTHX; 3433 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3434 int i;
954 3435
955 LOCK; 3436 PUSHMARK (SP);
956 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
957 UNLOCK;
958 3437
959 api_schedule (); 3438 /* first push all args to the stack */
960} 3439 EXTEND (SP, items + 1);
961 3440
3441 for (i = 0; i < items; ++i)
3442 PUSHs (arg [i]);
3443
3444 /* now push the callback closure */
3445 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3446
3447 /* now call the AIO function - we assume our request is uncancelable */
3448 PUTBACK;
3449 call_sv ((SV *)req, G_VOID | G_DISCARD);
3450 }
3451
3452 /* now that the request is going, we loop till we have a result */
3453 frame->data = (void *)state;
3454 frame->prepare = prepare_schedule;
3455 frame->check = slf_check_aio_req;
3456}
3457
3458static void
3459coro_aio_req_xs (pTHX_ CV *cv)
3460{
3461 dXSARGS;
3462
3463 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3464
3465 XSRETURN_EMPTY;
3466}
3467
3468/*****************************************************************************/
3469
3470#if CORO_CLONE
3471# include "clone.c"
3472#endif
3473
3474/*****************************************************************************/
3475
3476static SV *
3477coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3478{
3479 SV *coro_sv;
3480 struct coro *coro;
3481 MAGIC *mg;
3482 HV *hv;
3483 SV *cb;
3484 int i;
3485
3486 if (argc > 0)
3487 {
3488 cb = s_get_cv_croak (argv [0]);
3489
3490 if (!is_coro)
3491 {
3492 if (CvISXSUB (cb))
3493 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3494
3495 if (!CvROOT (cb))
3496 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3497 }
3498 }
3499
3500 Newz (0, coro, 1, struct coro);
3501 coro->args = newAV ();
3502 coro->flags = CF_NEW;
3503
3504 if (coro_first) coro_first->prev = coro;
3505 coro->next = coro_first;
3506 coro_first = coro;
3507
3508 coro->hv = hv = newHV ();
3509 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3510 mg->mg_flags |= MGf_DUP;
3511 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3512
3513 if (argc > 0)
3514 {
3515 av_extend (coro->args, argc + is_coro - 1);
3516
3517 if (is_coro)
3518 {
3519 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3520 cb = (SV *)cv_coro_run;
3521 }
3522
3523 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3524
3525 for (i = 1; i < argc; i++)
3526 av_push (coro->args, newSVsv (argv [i]));
3527 }
3528
3529 return coro_sv;
3530}
3531
3532#ifndef __cplusplus
3533ecb_cold XS(boot_Coro__State);
3534#endif
3535
3536#if CORO_JIT
3537
3538static void ecb_noinline ecb_cold
3539pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3540{
3541 dSP;
3542 AV *av = newAV ();
3543
3544 av_store (av, 3, newSVuv (d));
3545 av_store (av, 2, newSVuv (c));
3546 av_store (av, 1, newSVuv (b));
3547 av_store (av, 0, newSVuv (a));
3548
3549 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3550
3551 PUTBACK;
3552}
3553
3554static void ecb_noinline ecb_cold
3555jit_init (pTHX)
3556{
3557 dSP;
3558 SV *load, *save;
3559 char *map_base;
3560 char *load_ptr, *save_ptr;
3561 STRLEN load_len, save_len, map_len;
3562 int count;
3563
3564 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3565
3566 PUSHMARK (SP);
3567 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3568 #include "state.h"
3569 count = call_pv ("Coro::State::_jit", G_ARRAY);
3570 SPAGAIN;
3571
3572 save = POPs; save_ptr = SvPVbyte (save, save_len);
3573 load = POPs; load_ptr = SvPVbyte (load, load_len);
3574
3575 map_len = load_len + save_len + 16;
3576
3577 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3578
3579 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3580
3581 load_perl_slots = (load_save_perl_slots_type)map_base;
3582 memcpy (map_base, load_ptr, load_len);
3583
3584 map_base += (load_len + 15) & ~15;
3585
3586 save_perl_slots = (load_save_perl_slots_type)map_base;
3587 memcpy (map_base, save_ptr, save_len);
3588
3589 /* we are good citizens and try to make the page read-only, so the evil evil */
3590 /* hackers might have it a bit more difficult */
3591 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3592
3593 PUTBACK;
3594 eval_pv ("undef &Coro::State::_jit", 1);
3595}
3596
3597#endif
3598
962MODULE = Coro::State PACKAGE = Coro::State 3599MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
963 3600
964PROTOTYPES: ENABLE 3601PROTOTYPES: DISABLE
965 3602
966BOOT: 3603BOOT:
967{ /* {} necessary for stoopid perl-5.6.x */ 3604{
3605#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3606#include "state.h"
968#ifdef USE_ITHREADS 3607#ifdef USE_ITHREADS
969 MUTEX_INIT (&coro_mutex); 3608# if CORO_PTHREAD
3609 coro_thx = PERL_GET_CONTEXT;
970#endif 3610# endif
3611#endif
3612 /* perl defines these to check for existance first, but why it doesn't */
3613 /* just create them one at init time is not clear to me, except for */
3614 /* programs trying to delete them, but... */
3615 /* anyway, we declare this as invalid and make sure they are initialised here */
3616 DEFSV;
3617 ERRSV;
971 3618
972 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3619 cctx_current = cctx_new_empty ();
973 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3620
3621 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3622 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3623
3624 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3625 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3626 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3627
3628 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3629 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3630
974 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3631 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975 3632
976 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3633 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
977 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3634 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
978 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3635 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
979 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3636 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
980 3637
981 main_mainstack = PL_mainstack; 3638 main_mainstack = PL_mainstack;
3639 main_top_env = PL_top_env;
982 3640
3641 while (main_top_env->je_prev)
3642 main_top_env = main_top_env->je_prev;
3643
3644 {
3645 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3646
3647 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3648 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3649
3650 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3651 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3652 }
3653
983 coroapi.ver = CORO_API_VERSION; 3654 coroapi.ver = CORO_API_VERSION;
3655 coroapi.rev = CORO_API_REVISION;
3656
984 coroapi.transfer = api_transfer; 3657 coroapi.transfer = api_transfer;
985}
986 3658
987Coro::State 3659 coroapi.sv_state = SvSTATE_;
988_newprocess(args) 3660 coroapi.execute_slf = api_execute_slf;
989 SV * args 3661 coroapi.prepare_nop = prepare_nop;
3662 coroapi.prepare_schedule = prepare_schedule;
3663 coroapi.prepare_cede = prepare_cede;
3664 coroapi.prepare_cede_notself = prepare_cede_notself;
3665
3666 time_init (aTHX);
3667
3668 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3669#if CORO_JIT
3670 PUTBACK;
3671 jit_init (aTHX);
3672 SPAGAIN;
3673#endif
3674}
3675
3676SV *
3677new (SV *klass, ...)
3678 ALIAS:
3679 Coro::new = 1
3680 CODE:
3681 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3682 OUTPUT:
3683 RETVAL
3684
3685void
3686transfer (...)
3687 PROTOTYPE: $$
3688 CODE:
3689 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3690
3691SV *
3692clone (Coro::State coro)
3693 CODE:
3694{
3695#if CORO_CLONE
3696 struct coro *ncoro = coro_clone (aTHX_ coro);
3697 MAGIC *mg;
3698 /* TODO: too much duplication */
3699 ncoro->hv = newHV ();
3700 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3701 mg->mg_flags |= MGf_DUP;
3702 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3703#else
3704 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3705#endif
3706}
3707 OUTPUT:
3708 RETVAL
3709
3710int
3711cctx_stacksize (int new_stacksize = 0)
3712 PROTOTYPE: ;$
3713 CODE:
3714 RETVAL = cctx_stacksize;
3715 if (new_stacksize)
3716 {
3717 cctx_stacksize = new_stacksize;
3718 ++cctx_gen;
3719 }
3720 OUTPUT:
3721 RETVAL
3722
3723int
3724cctx_max_idle (int max_idle = 0)
3725 PROTOTYPE: ;$
3726 CODE:
3727 RETVAL = cctx_max_idle;
3728 if (max_idle > 1)
3729 cctx_max_idle = max_idle;
3730 OUTPUT:
3731 RETVAL
3732
3733int
3734cctx_count ()
3735 PROTOTYPE:
3736 CODE:
3737 RETVAL = cctx_count;
3738 OUTPUT:
3739 RETVAL
3740
3741int
3742cctx_idle ()
3743 PROTOTYPE:
3744 CODE:
3745 RETVAL = cctx_idle;
3746 OUTPUT:
3747 RETVAL
3748
3749void
3750list ()
3751 PROTOTYPE:
3752 PPCODE:
3753{
3754 struct coro *coro;
3755 for (coro = coro_first; coro; coro = coro->next)
3756 if (coro->hv)
3757 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3758}
3759
3760void
3761call (Coro::State coro, SV *coderef)
3762 ALIAS:
3763 eval = 1
3764 CODE:
3765{
3766 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3767 {
3768 struct coro *current = SvSTATE_current;
3769 struct CoroSLF slf_save;
3770
3771 if (current != coro)
3772 {
3773 PUTBACK;
3774 save_perl (aTHX_ current);
3775 load_perl (aTHX_ coro);
3776 /* the coro is most likely in an active SLF call.
3777 * while not strictly required (the code we execute is
3778 * not allowed to call any SLF functions), it's cleaner
3779 * to reinitialise the slf_frame and restore it later.
3780 * This might one day allow us to actually do SLF calls
3781 * from code executed here.
3782 */
3783 slf_save = slf_frame;
3784 slf_frame.prepare = 0;
3785 SPAGAIN;
3786 }
3787
3788 PUSHSTACK;
3789
3790 PUSHMARK (SP);
3791 PUTBACK;
3792
3793 if (ix)
3794 eval_sv (coderef, 0);
3795 else
3796 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3797
3798 POPSTACK;
3799 SPAGAIN;
3800
3801 if (current != coro)
3802 {
3803 PUTBACK;
3804 slf_frame = slf_save;
3805 save_perl (aTHX_ coro);
3806 load_perl (aTHX_ current);
3807 SPAGAIN;
3808 }
3809 }
3810}
3811
3812SV *
3813is_ready (Coro::State coro)
990 PROTOTYPE: $ 3814 PROTOTYPE: $
3815 ALIAS:
3816 is_ready = CF_READY
3817 is_running = CF_RUNNING
3818 is_new = CF_NEW
3819 is_destroyed = CF_ZOMBIE
3820 is_zombie = CF_ZOMBIE
3821 is_suspended = CF_SUSPENDED
3822 CODE:
3823 RETVAL = boolSV (coro->flags & ix);
3824 OUTPUT:
3825 RETVAL
3826
3827void
3828throw (SV *self, SV *exception = &PL_sv_undef)
3829 PROTOTYPE: $;$
991 CODE: 3830 CODE:
992 Coro__State coro; 3831{
3832 struct coro *coro = SvSTATE (self);
3833 struct coro *current = SvSTATE_current;
3834 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3835 SvREFCNT_dec (*exceptionp);
3836 SvGETMAGIC (exception);
3837 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
993 3838
994 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3839 api_ready (aTHX_ self);
995 croak ("Coro::State::_newprocess expects an arrayref"); 3840}
3841
3842void
3843api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3844 PROTOTYPE: $;$
3845 C_ARGS: aTHX_ coro, flags
3846
3847SV *
3848has_cctx (Coro::State coro)
3849 PROTOTYPE: $
3850 CODE:
3851 /* maybe manage the running flag differently */
3852 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3853 OUTPUT:
3854 RETVAL
3855
3856int
3857is_traced (Coro::State coro)
3858 PROTOTYPE: $
3859 CODE:
3860 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3861 OUTPUT:
3862 RETVAL
3863
3864UV
3865rss (Coro::State coro)
3866 PROTOTYPE: $
3867 ALIAS:
3868 usecount = 1
3869 CODE:
3870 switch (ix)
3871 {
3872 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3873 case 1: RETVAL = coro->usecount; break;
996 3874 }
997 Newz (0, coro, 1, struct coro); 3875 OUTPUT:
998
999 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
1000 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1001 /*coro->stack = 0;*/
1002
1003 /* same as JMPENV_BOOTSTRAP */
1004 /* we might be able to recycle start_env, but safe is safe */
1005 /*Zero(&coro->start_env, 1, JMPENV);*/
1006 coro->start_env.je_ret = -1;
1007 coro->start_env.je_mustcatch = TRUE;
1008
1009 RETVAL = coro; 3876 RETVAL
3877
3878void
3879force_cctx ()
3880 PROTOTYPE:
3881 CODE:
3882 cctx_current->idle_sp = 0;
3883
3884void
3885swap_defsv (Coro::State self)
3886 PROTOTYPE: $
3887 ALIAS:
3888 swap_defav = 1
3889 CODE:
3890 if (!self->slot)
3891 croak ("cannot swap state with coroutine that has no saved state,");
3892 else
3893 {
3894 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3895 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3896
3897 SV *tmp = *src; *src = *dst; *dst = tmp;
3898 }
3899
3900void
3901cancel (Coro::State self)
3902 CODE:
3903 coro_state_destroy (aTHX_ self);
3904
3905SV *
3906enable_times (int enabled = enable_times)
3907 CODE:
3908{
3909 RETVAL = boolSV (enable_times);
3910
3911 if (enabled != enable_times)
3912 {
3913 enable_times = enabled;
3914
3915 coro_times_update ();
3916 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3917 }
3918}
1010 OUTPUT: 3919 OUTPUT:
1011 RETVAL 3920 RETVAL
1012 3921
1013void 3922void
1014transfer(prev, next, flags) 3923times (Coro::State self)
1015 SV *prev 3924 PPCODE:
1016 SV *next 3925{
1017 int flags 3926 struct coro *current = SvSTATE (coro_current);
1018 PROTOTYPE: @ 3927
3928 if (ecb_expect_false (current == self))
3929 {
3930 coro_times_update ();
3931 coro_times_add (SvSTATE (coro_current));
3932 }
3933
3934 EXTEND (SP, 2);
3935 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3936 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3937
3938 if (ecb_expect_false (current == self))
3939 coro_times_sub (SvSTATE (coro_current));
3940}
3941
3942void
3943swap_sv (Coro::State coro, SV *sva, SV *svb)
3944 CODE:
3945{
3946 struct coro *current = SvSTATE_current;
3947 AV *swap_sv;
3948 int i;
3949
3950 sva = SvRV (sva);
3951 svb = SvRV (svb);
3952
3953 if (current == coro)
3954 SWAP_SVS_LEAVE (current);
3955
3956 if (!coro->swap_sv)
3957 coro->swap_sv = newAV ();
3958
3959 swap_sv = coro->swap_sv;
3960
3961 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3962 {
3963 SV *a = AvARRAY (swap_sv)[i ];
3964 SV *b = AvARRAY (swap_sv)[i + 1];
3965
3966 if (a == sva && b == svb)
3967 {
3968 SvREFCNT_dec_NN (a);
3969 SvREFCNT_dec_NN (b);
3970
3971 for (; i <= AvFILLp (swap_sv) - 2; i++)
3972 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
3973
3974 AvFILLp (swap_sv) -= 2;
3975
3976 goto removed;
3977 }
3978 }
3979
3980 av_push (swap_sv, SvREFCNT_inc_NN (sva));
3981 av_push (swap_sv, SvREFCNT_inc_NN (svb));
3982
3983 removed:
3984
3985 if (current == coro)
3986 SWAP_SVS_ENTER (current);
3987}
3988
3989
3990MODULE = Coro::State PACKAGE = Coro
3991
3992BOOT:
3993{
3994 if (SVt_LAST > 32)
3995 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
3996
3997 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3998 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3999 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4000 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4001 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4002 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4003 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4004 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4005
4006 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4007 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4008 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4009 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4010
4011 coro_stash = gv_stashpv ("Coro", TRUE);
4012
4013 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
4014 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
4015 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
4016 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
4017 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
4018 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
4019
4020 {
4021 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
4022
4023 coroapi.schedule = api_schedule;
4024 coroapi.schedule_to = api_schedule_to;
4025 coroapi.cede = api_cede;
4026 coroapi.cede_notself = api_cede_notself;
4027 coroapi.ready = api_ready;
4028 coroapi.is_ready = api_is_ready;
4029 coroapi.nready = coro_nready;
4030 coroapi.current = coro_current;
4031
4032 coroapi.enterleave_hook = api_enterleave_hook;
4033 coroapi.enterleave_unhook = api_enterleave_unhook;
4034 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4035
4036 /*GCoroAPI = &coroapi;*/
4037 sv_setiv (sv, (IV)&coroapi);
4038 SvREADONLY_on (sv);
4039 }
4040}
4041
4042SV *
4043async (...)
4044 PROTOTYPE: &@
1019 CODE: 4045 CODE:
1020 PUTBACK; 4046 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
1021 SV_CORO (next, "Coro::transfer"); 4047 api_ready (aTHX_ RETVAL);
1022 SV_CORO (prev, "Coro::transfer"); 4048 OUTPUT:
1023 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 4049 RETVAL
1024 SPAGAIN;
1025 4050
1026void 4051void
1027DESTROY(coro) 4052_destroy (Coro::State coro)
1028 Coro::State coro 4053 CODE:
1029 CODE: 4054 /* used by the manager thread */
1030 4055 coro_state_destroy (aTHX_ coro);
1031 if (coro->mainstack && coro->mainstack != main_mainstack)
1032 {
1033 struct coro temp;
1034
1035 PUTBACK;
1036 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1037 LOAD (aTHX_ coro);
1038 SPAGAIN;
1039
1040 destroy_stacks (aTHX);
1041
1042 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043 SPAGAIN;
1044
1045 coro->mainstack = 0;
1046 }
1047
1048 deallocate_stack (coro);
1049 SvREFCNT_dec (coro->args);
1050 Safefree (coro);
1051 4056
1052void 4057void
1053_exit(code) 4058on_destroy (Coro::State coro, SV *cb)
1054 int code 4059 CODE:
4060 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4061
4062void
4063join (...)
4064 CODE:
4065 CORO_EXECUTE_SLF_XS (slf_init_join);
4066
4067void
4068terminate (...)
4069 CODE:
4070 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4071
4072void
4073cancel (...)
4074 CODE:
4075 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4076
4077int
4078safe_cancel (Coro::State self, ...)
4079 C_ARGS: aTHX_ self, &ST (1), items - 1
4080
4081void
4082schedule (...)
4083 CODE:
4084 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4085
4086void
4087schedule_to (...)
4088 CODE:
4089 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4090
4091void
4092cede_to (...)
4093 CODE:
4094 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4095
4096void
4097cede (...)
4098 CODE:
4099 CORO_EXECUTE_SLF_XS (slf_init_cede);
4100
4101void
4102cede_notself (...)
4103 CODE:
4104 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4105
4106void
4107_set_current (SV *current)
1055 PROTOTYPE: $ 4108 PROTOTYPE: $
1056 CODE: 4109 CODE:
1057 _exit (code); 4110 SvREFCNT_dec_NN (SvRV (coro_current));
1058 4111 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1059MODULE = Coro::State PACKAGE = Coro::Cont
1060
1061# this is slightly dirty (should expose a c-level api)
1062 4112
1063void 4113void
1064yield(...) 4114_set_readyhook (SV *hook)
1065 PROTOTYPE: @ 4115 PROTOTYPE: $
1066 CODE: 4116 CODE:
1067 SV *yieldstack;
1068 SV *sv;
1069 AV *defav = GvAV (PL_defgv);
1070 struct coro *prev, *next;
1071
1072 yieldstack = *hv_fetch (
1073 (HV *)SvRV (GvSV (coro_current)),
1074 "yieldstack", sizeof ("yieldstack") - 1,
1075 0
1076 );
1077
1078 /* set up @_ -- ugly */
1079 av_clear (defav);
1080 av_fill (defav, items - 1);
1081 while (items--)
1082 av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084 sv = av_pop ((AV *)SvRV (yieldstack));
1085 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1086 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1087 SvREFCNT_dec (sv); 4117 SvREFCNT_dec (coro_readyhook);
1088 4118 SvGETMAGIC (hook);
1089 transfer (aTHX_ prev, next, 0); 4119 if (SvOK (hook))
1090 4120 {
1091MODULE = Coro::State PACKAGE = Coro
1092
1093# this is slightly dirty (should expose a c-level api)
1094
1095BOOT:
1096{
1097 int i;
1098 HV *stash = gv_stashpv ("Coro", TRUE);
1099
1100 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106
1107 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1108 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1109
1110 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1111 coro_ready[i] = newAV (); 4121 coro_readyhook = newSVsv (hook);
1112 4122 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1113 {
1114 SV *sv = perl_get_sv("Coro::API", 1);
1115
1116 coroapi.schedule = api_schedule;
1117 coroapi.cede = api_cede;
1118 coroapi.ready = api_ready;
1119 coroapi.nready = &coro_nready;
1120 coroapi.current = coro_current;
1121
1122 GCoroAPI = &coroapi;
1123 sv_setiv(sv, (IV)&coroapi);
1124 SvREADONLY_on(sv);
1125 } 4123 }
1126} 4124 else
4125 {
4126 coro_readyhook = 0;
4127 CORO_READYHOOK = 0;
4128 }
1127 4129
1128#if !PERL_MICRO 4130int
4131prio (Coro::State coro, int newprio = 0)
4132 PROTOTYPE: $;$
4133 ALIAS:
4134 nice = 1
4135 CODE:
4136{
4137 RETVAL = coro->prio;
1129 4138
1130void 4139 if (items > 1)
4140 {
4141 if (ix)
4142 newprio = coro->prio - newprio;
4143
4144 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
4145 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
4146
4147 coro->prio = newprio;
4148 }
4149}
4150 OUTPUT:
4151 RETVAL
4152
4153SV *
1131ready(self) 4154ready (SV *self)
1132 SV * self
1133 PROTOTYPE: $ 4155 PROTOTYPE: $
1134 CODE: 4156 CODE:
1135 api_ready (self); 4157 RETVAL = boolSV (api_ready (aTHX_ self));
1136 4158 OUTPUT:
1137#endif 4159 RETVAL
1138 4160
1139int 4161int
1140nready(...) 4162nready (...)
1141 PROTOTYPE: 4163 PROTOTYPE:
1142 CODE: 4164 CODE:
1143 RETVAL = coro_nready; 4165 RETVAL = coro_nready;
1144 OUTPUT: 4166 OUTPUT:
1145 RETVAL 4167 RETVAL
1146 4168
1147void 4169void
1148schedule(...) 4170suspend (Coro::State self)
1149 PROTOTYPE: 4171 PROTOTYPE: $
1150 CODE: 4172 CODE:
1151 api_schedule (); 4173 self->flags |= CF_SUSPENDED;
1152 4174
1153void 4175void
1154cede(...) 4176resume (Coro::State self)
1155 PROTOTYPE: 4177 PROTOTYPE: $
1156 CODE: 4178 CODE:
1157 api_cede (); 4179 self->flags &= ~CF_SUSPENDED;
1158 4180
1159# and these are hacks 4181void
4182_pool_handler (...)
4183 CODE:
4184 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4185
4186void
4187async_pool (SV *cv, ...)
4188 PROTOTYPE: &@
4189 PPCODE:
4190{
4191 HV *hv = (HV *)av_pop (av_async_pool);
4192 AV *av = newAV ();
4193 SV *cb = ST (0);
4194 int i;
4195
4196 av_extend (av, items - 2);
4197 for (i = 1; i < items; ++i)
4198 av_push (av, SvREFCNT_inc_NN (ST (i)));
4199
4200 if ((SV *)hv == &PL_sv_undef)
4201 {
4202 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4203 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4204 SvREFCNT_dec_NN (sv);
4205 }
4206
4207 {
4208 struct coro *coro = SvSTATE_hv (hv);
4209
4210 assert (!coro->invoke_cb);
4211 assert (!coro->invoke_av);
4212 coro->invoke_cb = SvREFCNT_inc (cb);
4213 coro->invoke_av = av;
4214 }
4215
4216 api_ready (aTHX_ (SV *)hv);
4217
4218 if (GIMME_V != G_VOID)
4219 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4220 else
4221 SvREFCNT_dec_NN (hv);
4222}
4223
1160SV * 4224SV *
1161_aio_get_state () 4225rouse_cb ()
4226 PROTOTYPE:
1162 CODE: 4227 CODE:
1163{ 4228 RETVAL = coro_new_rouse_cb (aTHX);
1164 struct {
1165 int errorno;
1166 int laststype;
1167 int laststatval;
1168 Stat_t statcache;
1169 } data;
1170
1171 data.errorno = errno;
1172 data.laststype = PL_laststype;
1173 data.laststatval = PL_laststatval;
1174 data.statcache = PL_statcache;
1175
1176 RETVAL = newSVpvn ((char *)&data, sizeof data);
1177}
1178 OUTPUT: 4229 OUTPUT:
1179 RETVAL 4230 RETVAL
1180 4231
1181void 4232void
1182_aio_set_state (char *data_) 4233rouse_wait (...)
4234 PROTOTYPE: ;$
4235 PPCODE:
4236 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4237
4238void
4239on_enter (SV *block)
4240 ALIAS:
4241 on_leave = 1
1183 PROTOTYPE: $ 4242 PROTOTYPE: &
1184 CODE: 4243 CODE:
1185{ 4244{
1186 struct { 4245 struct coro *coro = SvSTATE_current;
4246 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4247
4248 block = s_get_cv_croak (block);
4249
4250 if (!*avp)
4251 *avp = newAV ();
4252
4253 av_push (*avp, SvREFCNT_inc (block));
4254
4255 if (!ix)
4256 on_enterleave_call (aTHX_ block);
4257
4258 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4259 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4260 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4261}
4262
4263
4264MODULE = Coro::State PACKAGE = PerlIO::cede
4265
4266BOOT:
4267 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4268
4269
4270MODULE = Coro::State PACKAGE = Coro::Semaphore
4271
4272SV *
4273new (SV *klass, SV *count = 0)
4274 CODE:
4275{
4276 int semcnt = 1;
4277
4278 if (count)
4279 {
4280 SvGETMAGIC (count);
4281
4282 if (SvOK (count))
4283 semcnt = SvIV (count);
4284 }
4285
4286 RETVAL = sv_bless (
4287 coro_waitarray_new (aTHX_ semcnt),
4288 GvSTASH (CvGV (cv))
4289 );
4290}
4291 OUTPUT:
4292 RETVAL
4293
4294# helper for Coro::Channel and others
4295SV *
4296_alloc (int count)
4297 CODE:
4298 RETVAL = coro_waitarray_new (aTHX_ count);
4299 OUTPUT:
4300 RETVAL
4301
4302SV *
4303count (SV *self)
4304 CODE:
4305 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4306 OUTPUT:
4307 RETVAL
4308
4309void
4310up (SV *self)
4311 CODE:
4312 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4313
4314void
4315adjust (SV *self, int adjust)
4316 CODE:
4317 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4318
4319void
4320down (...)
4321 CODE:
4322 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4323
4324void
4325wait (...)
4326 CODE:
4327 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4328
4329void
4330try (SV *self)
4331 PPCODE:
4332{
4333 AV *av = (AV *)SvRV (self);
4334 SV *count_sv = AvARRAY (av)[0];
4335 IV count = SvIVX (count_sv);
4336
4337 if (count > 0)
4338 {
4339 --count;
4340 SvIVX (count_sv) = count;
4341 XSRETURN_YES;
4342 }
4343 else
4344 XSRETURN_NO;
4345}
4346
4347void
4348waiters (SV *self)
4349 PPCODE:
4350{
4351 AV *av = (AV *)SvRV (self);
4352 int wcount = AvFILLp (av) + 1 - 1;
4353
4354 if (GIMME_V == G_SCALAR)
4355 XPUSHs (sv_2mortal (newSViv (wcount)));
4356 else
4357 {
1187 int errorno; 4358 int i;
1188 int laststype; 4359 EXTEND (SP, wcount);
1189 int laststatval; 4360 for (i = 1; i <= wcount; ++i)
1190 Stat_t statcache; 4361 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1191 } *data = (void *)data_; 4362 }
1192
1193 errno = data->errorno;
1194 PL_laststype = data->laststype;
1195 PL_laststatval = data->laststatval;
1196 PL_statcache = data->statcache;
1197} 4363}
4364
4365MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4366
4367void
4368_may_delete (SV *sem, int count, unsigned int extra_refs)
4369 PPCODE:
4370{
4371 AV *av = (AV *)SvRV (sem);
4372
4373 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4374 && AvFILLp (av) == 0 /* no waiters, just count */
4375 && SvIV (AvARRAY (av)[0]) == count)
4376 XSRETURN_YES;
4377
4378 XSRETURN_NO;
4379}
4380
4381MODULE = Coro::State PACKAGE = Coro::Signal
4382
4383SV *
4384new (SV *klass)
4385 CODE:
4386 RETVAL = sv_bless (
4387 coro_waitarray_new (aTHX_ 0),
4388 GvSTASH (CvGV (cv))
4389 );
4390 OUTPUT:
4391 RETVAL
4392
4393void
4394wait (...)
4395 CODE:
4396 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4397
4398void
4399broadcast (SV *self)
4400 CODE:
4401{
4402 AV *av = (AV *)SvRV (self);
4403 coro_signal_wake (aTHX_ av, AvFILLp (av));
4404}
4405
4406void
4407send (SV *self)
4408 CODE:
4409{
4410 AV *av = (AV *)SvRV (self);
4411
4412 if (AvFILLp (av))
4413 coro_signal_wake (aTHX_ av, 1);
4414 else
4415 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4416}
4417
4418IV
4419awaited (SV *self)
4420 CODE:
4421 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4422 OUTPUT:
4423 RETVAL
4424
4425
4426MODULE = Coro::State PACKAGE = Coro::AnyEvent
4427
4428BOOT:
4429 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4430
4431void
4432_schedule (...)
4433 CODE:
4434{
4435 static int incede;
4436
4437 api_cede_notself (aTHX);
4438
4439 ++incede;
4440 while (coro_nready >= incede && api_cede (aTHX))
4441 ;
4442
4443 sv_setsv (sv_activity, &PL_sv_undef);
4444 if (coro_nready >= incede)
4445 {
4446 PUSHMARK (SP);
4447 PUTBACK;
4448 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4449 }
4450
4451 --incede;
4452}
4453
4454
4455MODULE = Coro::State PACKAGE = Coro::AIO
4456
4457void
4458_register (char *target, char *proto, SV *req)
4459 CODE:
4460{
4461 SV *req_cv = s_get_cv_croak (req);
4462 /* newXSproto doesn't return the CV on 5.8 */
4463 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4464 sv_setpv ((SV *)slf_cv, proto);
4465 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4466}
4467
4468MODULE = Coro::State PACKAGE = Coro::Select
4469
4470void
4471patch_pp_sselect ()
4472 CODE:
4473 if (!coro_old_pp_sselect)
4474 {
4475 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4476 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4477 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4478 }
4479
4480void
4481unpatch_pp_sselect ()
4482 CODE:
4483 if (coro_old_pp_sselect)
4484 {
4485 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4486 coro_old_pp_sselect = 0;
4487 }
4488
4489MODULE = Coro::State PACKAGE = Coro::Util
4490
4491void
4492_exit (int code)
4493 CODE:
4494 _exit (code);
4495
4496NV
4497time ()
4498 CODE:
4499 RETVAL = nvtime (aTHX);
4500 OUTPUT:
4501 RETVAL
4502
4503NV
4504gettimeofday ()
4505 PPCODE:
4506{
4507 UV tv [2];
4508 u2time (aTHX_ tv);
4509 EXTEND (SP, 2);
4510 PUSHs (sv_2mortal (newSVuv (tv [0])));
4511 PUSHs (sv_2mortal (newSVuv (tv [1])));
4512}
4513

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