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Comparing Coro/Coro/State.xs (file contents):
Revision 1.48 by pcg, Sat Nov 15 03:53:37 2003 UTC vs.
Revision 1.448 by root, Thu Jun 4 22:58:28 2015 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "patchlevel.h" 16#include "schmorp.h"
6 17
7#if PATCHLEVEL < 6 18#define ECB_NO_THREADS 1
8# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
9# 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 SVs_PADSTALE
28# define SVs_PADSTALE 0
29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
10# endif 39# endif
11# ifndef call_sv 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
12# define call_sv perl_call_sv 41# define PadlistMAX(pl) AvFILLp (pl)
42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
43# define PadARRAY AvARRAY
44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
46#endif
47#ifndef PadnamelistREFCNT
48# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
49#endif
50#ifndef PadnamelistREFCNT_dec
51# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
52#endif
53
54/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
55/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
56#if PERL_VERSION_ATLEAST(5,19,0)
57# define SVt_BIND SVt_IV
58#endif
59
60#if defined(_WIN32)
61# undef HAS_GETTIMEOFDAY
62# undef setjmp
63# undef longjmp
64# undef _exit
65# define setjmp _setjmp /* deep magic */
66#else
67# include <inttypes.h> /* most portable stdint.h */
68#endif
69
70/* the maximum number of idle cctx that will be pooled */
71static int cctx_max_idle = 4;
72
73#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
74# define HAS_SCOPESTACK_NAME 1
75#endif
76
77/* prefer perl internal functions over our own? */
78#ifndef CORO_PREFER_PERL_FUNCTIONS
79# define CORO_PREFER_PERL_FUNCTIONS 0
80#endif
81
82/* The next macros try to return the current stack pointer, in an as
83 * portable way as possible. */
84#if __GNUC__ >= 4
85# define dSTACKLEVEL int stacklevel_dummy
86# define STACKLEVEL __builtin_frame_address (0)
87#else
88# define dSTACKLEVEL volatile void *stacklevel
89# define STACKLEVEL ((void *)&stacklevel)
90#endif
91
92#define IN_DESTRUCT PL_dirty
93
94#include "CoroAPI.h"
95#define GCoroAPI (&coroapi) /* very sneaky */
96
97#ifdef USE_ITHREADS
98# if CORO_PTHREAD
99static void *coro_thx;
13# endif 100# endif
14# ifndef get_sv 101#endif
15# define get_sv perl_get_sv 102
103#ifdef __linux
104# include <time.h> /* for timespec */
105# include <syscall.h> /* for SYS_* */
106# ifdef SYS_clock_gettime
107# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
108# define CORO_CLOCK_MONOTONIC 1
109# define CORO_CLOCK_THREAD_CPUTIME_ID 3
16# endif 110# endif
17# ifndef get_cv
18# define get_cv perl_get_cv
19# endif 111#endif
20# ifndef IS_PADGV
21# define IS_PADGV(v) 0
22# endif
23# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0
25# endif
26#endif
27 112
28#include "libcoro/coro.c" 113static double (*nvtime)(); /* so why doesn't it take void? */
114static void (*u2time)(pTHX_ UV ret[2]);
29 115
30#include <signal.h> 116/* we hijack an hopefully unused CV flag for our purposes */
117#define CVf_SLF 0x4000
118static OP *pp_slf (pTHX);
119static void slf_destroy (pTHX_ struct coro *coro);
31 120
32#ifdef HAVE_MMAP 121static U32 cctx_gen;
33# include <unistd.h> 122static size_t cctx_stacksize = CORO_STACKSIZE;
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif
41# endif
42#endif
43
44#define MAY_FLUSH /* increases codesize and is rarely used */
45
46#define SUB_INIT "Coro::State::initialize"
47#define UCORO_STATE "_coro_state"
48
49/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53
54#define IN_DESTRUCT (PL_main_cv == Nullcv)
55
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60static struct CoroAPI coroapi; 123static struct CoroAPI coroapi;
124static AV *main_mainstack; /* used to differentiate between $main and others */
125static JMPENV *main_top_env;
126static HV *coro_state_stash, *coro_stash;
127static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
61 128
62/* this is actually not only the c stack but also c registers etc... */ 129static AV *av_destroy; /* destruction queue */
130static SV *sv_manager; /* the manager coro */
131static SV *sv_idle; /* $Coro::idle */
132
133static GV *irsgv; /* $/ */
134static GV *stdoutgv; /* *STDOUT */
135static SV *rv_diehook;
136static SV *rv_warnhook;
137static HV *hv_sig; /* %SIG */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static SV *sv_async_pool_idle; /* description string */
143static AV *av_async_pool; /* idle pool */
144static SV *sv_Coro; /* class string */
145static CV *cv_pool_handler;
146
147/* Coro::AnyEvent */
148static SV *sv_activity;
149
150/* enable processtime/realtime profiling */
151static char enable_times;
152typedef U32 coro_ts[2];
153static coro_ts time_real, time_cpu;
154static char times_valid;
155
156static struct coro_cctx *cctx_first;
157static int cctx_count, cctx_idle;
158
159enum
160{
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
168
169/* this is a structure representing a c-level coroutine */
63typedef struct { 170typedef struct coro_cctx
64 int refcnt; /* pointer reference counter */ 171{
65 int usecnt; /* shared by how many coroutines */ 172 struct coro_cctx *next;
66 int gencnt; /* generation counter */
67 173
174 /* the stack */
175 struct coro_stack stack;
176
177 /* cpu state */
178 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
179#ifndef NDEBUG
180 JMPENV *idle_te; /* same as idle_sp, but for top_env */
181#endif
182 JMPENV *top_env;
68 coro_context cctx; 183 coro_context cctx;
69 184
70 void *sptr; 185 U32 gen;
71 long ssize; /* positive == mmap, otherwise malloc */ 186#if CORO_USE_VALGRIND
72} coro_stack; 187 int valgrind_id;
188#endif
189 unsigned char flags;
190} coro_cctx;
73 191
192static coro_cctx *cctx_current; /* the currently running cctx */
193
194/*****************************************************************************/
195
196static MGVTBL coro_state_vtbl;
197
198enum
199{
200 CF_RUNNING = 0x0001, /* coroutine is running */
201 CF_READY = 0x0002, /* coroutine is ready */
202 CF_NEW = 0x0004, /* has never been switched to */
203 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
204 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
205 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
206};
207
208/* the structure where most of the perl state is stored, overlaid on the cxstack */
209typedef struct
210{
211 #define VARx(name,expr,type) type name;
212 #include "state.h"
213} perl_slots;
214
215/* how many context stack entries do we need for perl_slots */
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
218/* this is a structure representing a perl-level coroutine */
74struct coro { 219struct coro
75 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 220{
76 JMPENV start_env; 221 /* the C coroutine allocated to this perl coroutine, if any */
222 coro_cctx *cctx;
77 223
78 /* the optional C context */ 224 /* ready queue */
79 coro_stack *stack; 225 struct coro *next_ready;
80 void *cursp;
81 int gencnt;
82 226
83 /* optionally saved, might be zero */ 227 /* state data */
84 AV *defav; 228 struct CoroSLF slf_frame; /* saved slf frame */
85 SV *defsv;
86 SV *errsv;
87
88 /* saved global state not related to stacks */
89 U8 dowarn;
90 I32 in_eval;
91
92 /* the stacks and related info (callchain etc..) */
93 PERL_SI *curstackinfo;
94 AV *curstack;
95 AV *mainstack; 229 AV *mainstack;
96 SV **stack_sp; 230 perl_slots *slot; /* basically the saved sp */
97 OP *op;
98 SV **curpad;
99 AV *comppad;
100 SV **stack_base;
101 SV **stack_max;
102 SV **tmps_stack;
103 I32 tmps_floor;
104 I32 tmps_ix;
105 I32 tmps_max;
106 I32 *markstack;
107 I32 *markstack_ptr;
108 I32 *markstack_max;
109 I32 *scopestack;
110 I32 scopestack_ix;
111 I32 scopestack_max;
112 ANY *savestack;
113 I32 savestack_ix;
114 I32 savestack_max;
115 OP **retstack;
116 I32 retstack_ix;
117 I32 retstack_max;
118 COP *curcop;
119 JMPENV *top_env;
120 231
232 CV *startcv; /* the CV to execute */
121 /* data associated with this coroutine (initial args) */ 233 AV *args; /* data associated with this coroutine (initial args) */
122 AV *args; 234 int flags; /* CF_ flags */
235 HV *hv; /* the perl hash associated with this coro, if any */
236
237 /* statistics */
238 int usecount; /* number of transfers to this coro */
239
240 /* coro process data */
241 int prio;
242 SV *except; /* exception to be thrown */
243 SV *rouse_cb; /* last rouse callback */
244 AV *on_destroy; /* callbacks or coros to notify on destroy */
245 AV *status; /* the exit status list */
246
247 /* async_pool */
248 SV *saved_deffh;
249 SV *invoke_cb;
250 AV *invoke_av;
251
252 /* on_enter/on_leave */
253 AV *on_enter;
254 AV *on_leave;
255
256 /* swap_sv */
257 AV *swap_sv;
258
259 /* times */
260 coro_ts t_cpu, t_real;
261
262 /* linked list */
263 struct coro *next, *prev;
123}; 264};
124 265
125typedef struct coro *Coro__State; 266typedef struct coro *Coro__State;
126typedef struct coro *Coro__State_or_hashref; 267typedef struct coro *Coro__State_or_hashref;
127 268
128static AV *main_mainstack; /* used to differentiate between $main and others */ 269/* the following variables are effectively part of the perl context */
129static HV *coro_state_stash; 270/* and get copied between struct coro and these variables */
271/* the main reason we don't support windows process emulation */
272static struct CoroSLF slf_frame; /* the current slf frame */
273
274/** Coro ********************************************************************/
275
276#define CORO_PRIO_MAX 3
277#define CORO_PRIO_HIGH 1
278#define CORO_PRIO_NORMAL 0
279#define CORO_PRIO_LOW -1
280#define CORO_PRIO_IDLE -3
281#define CORO_PRIO_MIN -4
282
283/* for Coro.pm */
284static SV *coro_current;
285static SV *coro_readyhook;
286static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
287static CV *cv_coro_run;
288static struct coro *coro_first;
289#define coro_nready coroapi.nready
290
291/** JIT *********************************************************************/
292
293#if CORO_JIT
294 /* APPLE doesn't have mmap though */
295 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
296 #ifndef CORO_JIT_TYPE
297 #if ECB_AMD64 && CORO_JIT_UNIXY
298 #define CORO_JIT_TYPE "amd64-unix"
299 #elif __i386 && CORO_JIT_UNIXY
300 #define CORO_JIT_TYPE "x86-unix"
301 #endif
302 #endif
303#endif
304
305#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
306 #undef CORO_JIT
307#endif
308
309#if CORO_JIT
310 typedef void (*load_save_perl_slots_type)(perl_slots *);
311 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
312#endif
313
314/** Coro::Select ************************************************************/
315
316static OP *(*coro_old_pp_sselect) (pTHX);
130static SV *ucoro_state_sv; 317static SV *coro_select_select;
131static U32 ucoro_state_hash;
132static HV *padlist_cache;
133static SV *coro_mortal; /* will be freed after next transfer */
134 318
135/* mostly copied from op.c:cv_clone2 */ 319/* horrible hack, but if it works... */
136STATIC AV * 320static OP *
137clone_padlist (AV *protopadlist) 321coro_pp_sselect (pTHX)
138{ 322{
139 AV *av; 323 dSP;
140 I32 ix; 324 PUSHMARK (SP - 4); /* fake argument list */
141 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 325 XPUSHs (coro_select_select);
142 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 326 PUTBACK;
143 SV **pname = AvARRAY (protopad_name); 327
144 SV **ppad = AvARRAY (protopad); 328 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
145 I32 fname = AvFILLp (protopad_name); 329 PL_op->op_flags |= OPf_STACKED;
146 I32 fpad = AvFILLp (protopad); 330 PL_op->op_private = 0;
147 AV *newpadlist, *newpad_name, *newpad; 331 return PL_ppaddr [OP_ENTERSUB](aTHX);
332}
333
334/** time stuff **************************************************************/
335
336#ifdef HAS_GETTIMEOFDAY
337
338ecb_inline void
339coro_u2time (pTHX_ UV ret[2])
340{
341 struct timeval tv;
342 gettimeofday (&tv, 0);
343
344 ret [0] = tv.tv_sec;
345 ret [1] = tv.tv_usec;
346}
347
348ecb_inline double
349coro_nvtime (void)
350{
351 struct timeval tv;
352 gettimeofday (&tv, 0);
353
354 return tv.tv_sec + tv.tv_usec * 1e-6;
355}
356
357ecb_inline void
358time_init (pTHX)
359{
360 nvtime = coro_nvtime;
361 u2time = coro_u2time;
362}
363
364#else
365
366ecb_inline void
367time_init (pTHX)
368{
148 SV **npad; 369 SV **svp;
149 370
150 newpad_name = newAV (); 371 require_pv ("Time/HiRes.pm");
151 for (ix = fname; ix >= 0; ix--)
152 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153 372
154 newpad = newAV (); 373 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
155 av_fill (newpad, AvFILLp (protopad));
156 npad = AvARRAY (newpad);
157 374
158 newpadlist = newAV (); 375 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
376 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
377
378 nvtime = INT2PTR (double (*)(), SvIV (*svp));
379
380 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
381 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
382}
383
384#endif
385
386/** lowlevel stuff **********************************************************/
387
388static SV * ecb_noinline
389coro_get_sv (pTHX_ const char *name, int create)
390{
391#if PERL_VERSION_ATLEAST (5,10,0)
392 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
393 get_sv (name, create);
394#endif
395 return get_sv (name, create);
396}
397
398static AV * ecb_noinline
399coro_get_av (pTHX_ const char *name, int create)
400{
401#if PERL_VERSION_ATLEAST (5,10,0)
402 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
403 get_av (name, create);
404#endif
405 return get_av (name, create);
406}
407
408static HV * ecb_noinline
409coro_get_hv (pTHX_ const char *name, int create)
410{
411#if PERL_VERSION_ATLEAST (5,10,0)
412 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
413 get_hv (name, create);
414#endif
415 return get_hv (name, create);
416}
417
418ecb_inline void
419coro_times_update (void)
420{
421#ifdef coro_clock_gettime
422 struct timespec ts;
423
424 ts.tv_sec = ts.tv_nsec = 0;
425 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
426 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
427
428 ts.tv_sec = ts.tv_nsec = 0;
429 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
430 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
431#else
432 dTHX;
433 UV tv[2];
434
435 u2time (aTHX_ tv);
436 time_real [0] = tv [0];
437 time_real [1] = tv [1] * 1000;
438#endif
439}
440
441ecb_inline void
442coro_times_add (struct coro *c)
443{
444 c->t_real [1] += time_real [1];
445 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
446 c->t_real [0] += time_real [0];
447
448 c->t_cpu [1] += time_cpu [1];
449 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
450 c->t_cpu [0] += time_cpu [0];
451}
452
453ecb_inline void
454coro_times_sub (struct coro *c)
455{
456 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
457 c->t_real [1] -= time_real [1];
458 c->t_real [0] -= time_real [0];
459
460 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
461 c->t_cpu [1] -= time_cpu [1];
462 c->t_cpu [0] -= time_cpu [0];
463}
464
465/*****************************************************************************/
466/* magic glue */
467
468#define CORO_MAGIC_type_cv 26
469#define CORO_MAGIC_type_state PERL_MAGIC_ext
470
471#define CORO_MAGIC_NN(sv, type) \
472 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
473 ? SvMAGIC (sv) \
474 : mg_find (sv, type))
475
476#define CORO_MAGIC(sv, type) \
477 (ecb_expect_true (SvMAGIC (sv)) \
478 ? CORO_MAGIC_NN (sv, type) \
479 : 0)
480
481#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
482#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
483
484ecb_inline MAGIC *
485SvSTATEhv_p (pTHX_ SV *coro)
486{
487 MAGIC *mg;
488
489 if (ecb_expect_true (
490 SvTYPE (coro) == SVt_PVHV
491 && (mg = CORO_MAGIC_state (coro))
492 && mg->mg_virtual == &coro_state_vtbl
493 ))
494 return mg;
495
496 return 0;
497}
498
499ecb_inline struct coro *
500SvSTATE_ (pTHX_ SV *coro)
501{
502 MAGIC *mg;
503
504 if (SvROK (coro))
505 coro = SvRV (coro);
506
507 mg = SvSTATEhv_p (aTHX_ coro);
508 if (!mg)
509 croak ("Coro::State object required");
510
511 return (struct coro *)mg->mg_ptr;
512}
513
514#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
515
516/* faster than SvSTATE, but expects a coroutine hv */
517#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
518#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
519
520/*****************************************************************************/
521/* padlist management and caching */
522
523ecb_inline PADLIST *
524coro_derive_padlist (pTHX_ CV *cv)
525{
526 PADLIST *padlist = CvPADLIST (cv);
527 PADLIST *newpadlist;
528 PADNAMELIST *padnames;
529 PAD *newpad;
530 PADOFFSET off = PadlistMAX (padlist) + 1;
531
532#if NEWPADAPI
533
534 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
535 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
536 while (!PadlistARRAY (padlist)[off - 1])
537 --off;
538
539 Perl_pad_push (aTHX_ padlist, off);
540
541 newpad = PadlistARRAY (padlist)[off];
542 PadlistARRAY (padlist)[off] = 0;
543
544#else
545
546#if PERL_VERSION_ATLEAST (5,10,0)
547 Perl_pad_push (aTHX_ padlist, off);
548#else
549 Perl_pad_push (aTHX_ padlist, off, 1);
550#endif
551
552 newpad = PadlistARRAY (padlist)[off];
553 PadlistMAX (padlist) = off - 1;
554
555#endif
556
557 newPADLIST (newpadlist);
558#if !PERL_VERSION_ATLEAST(5,15,3)
559 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
159 AvREAL_off (newpadlist); 560 AvREAL_off (newpadlist);
160 av_store (newpadlist, 0, (SV *) newpad_name); 561#endif
161 av_store (newpadlist, 1, (SV *) newpad);
162 562
163 av = newAV (); /* will be @_ */ 563 /* Already extended to 2 elements by newPADLIST. */
164 av_extend (av, 0); 564 PadlistMAX (newpadlist) = 1;
165 av_store (newpad, 0, (SV *) av);
166 AvFLAGS (av) = AVf_REIFY;
167 565
168 for (ix = fpad; ix > 0; ix--) 566 padnames = PadlistNAMES (padlist);
567 ++PadnamelistREFCNT (padnames);
568 PadlistNAMES (newpadlist) = padnames;
569
570 PadlistARRAY (newpadlist)[1] = newpad;
571
572 return newpadlist;
573}
574
575ecb_inline void
576free_padlist (pTHX_ PADLIST *padlist)
577{
578 /* may be during global destruction */
579 if (!IN_DESTRUCT)
169 { 580 {
170 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 581 I32 i = PadlistMAX (padlist);
171 if (namesv && namesv != &PL_sv_undef) 582
583 while (i > 0) /* special-case index 0 */
172 { 584 {
173 char *name = SvPVX (namesv); /* XXX */ 585 /* we try to be extra-careful here */
174 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 586 PAD *pad = PadlistARRAY (padlist)[i--];
175 { /* lexical from outside? */ 587
176 npad[ix] = SvREFCNT_inc (ppad[ix]); 588 if (pad)
177 } 589 {
178 else 590 I32 j = PadMAX (pad);
179 { /* our own lexical */ 591
180 SV *sv; 592 while (j >= 0)
181 if (*name == '&') 593 SvREFCNT_dec (PadARRAY (pad)[j--]);
594
595 PadMAX (pad) = -1;
182 sv = SvREFCNT_inc (ppad[ix]); 596 SvREFCNT_dec (pad);
183 else if (*name == '@')
184 sv = (SV *) newAV ();
185 else if (*name == '%')
186 sv = (SV *) newHV ();
187 else
188 sv = NEWSV (0, 0);
189 if (!SvPADBUSY (sv))
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 } 597 }
193 } 598 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205 599
206#if 0 /* return -ENOTUNDERSTOOD */ 600 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
207 /* Now that vars are all in place, clone nested closures. */
208 601
209 for (ix = fpad; ix > 0; ix--) { 602#if NEWPADAPI
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 603 Safefree (PadlistARRAY (padlist));
211 if (namesv 604 Safefree (padlist);
212 && namesv != &PL_sv_undef 605#else
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225
226 return newpadlist;
227}
228
229#ifdef MAY_FLUSH
230STATIC void
231free_padlist (AV *padlist)
232{
233 /* may be during global destruction */
234 if (SvREFCNT(padlist))
235 {
236 I32 i = AvFILLp(padlist); 606 AvFILLp (padlist) = -1;
237 while (i >= 0) 607 AvREAL_off (padlist);
238 {
239 SV **svp = av_fetch(padlist, i--, FALSE);
240 SV *sv = svp ? *svp : Nullsv;
241 if (sv)
242 SvREFCNT_dec(sv);
243 }
244
245 SvREFCNT_dec((SV*)padlist); 608 SvREFCNT_dec ((SV*)padlist);
609#endif
610 }
611}
612
613static int
614coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
615{
616 PADLIST *padlist;
617 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
618 size_t len = *(size_t *)mg->mg_ptr;
619
620 /* perl manages to free our internal AV and _then_ call us */
621 if (IN_DESTRUCT)
622 return 0;
623
624 while (len--)
625 free_padlist (aTHX_ padlists[len]);
626
627 return 0;
628}
629
630static MGVTBL coro_cv_vtbl = {
631 0, 0, 0, 0,
632 coro_cv_free
633};
634
635/* the next two functions merely cache the padlists */
636ecb_inline void
637get_padlist (pTHX_ CV *cv)
638{
639 MAGIC *mg = CORO_MAGIC_cv (cv);
640 size_t *lenp;
641
642 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
643 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
644 else
645 {
646#if CORO_PREFER_PERL_FUNCTIONS
647 /* this is probably cleaner? but also slower! */
648 /* in practise, it seems to be less stable */
649 CV *cp = Perl_cv_clone (aTHX_ cv);
650 CvPADLIST (cv) = CvPADLIST (cp);
651 CvPADLIST (cp) = 0;
652 SvREFCNT_dec (cp);
653#else
654 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
655#endif
656 }
657}
658
659ecb_inline void
660put_padlist (pTHX_ CV *cv)
661{
662 MAGIC *mg = CORO_MAGIC_cv (cv);
663
664 if (ecb_expect_false (!mg))
665 {
666 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
667 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
668 mg->mg_len = 1; /* so mg_free frees mg_ptr */
669 }
670 else
671 Renew (mg->mg_ptr,
672 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
673 char);
674
675 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
676}
677
678/** load & save, init *******************************************************/
679
680ecb_inline void
681swap_sv (SV *a, SV *b)
682{
683 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
684 SV tmp;
685
686 /* swap sv_any */
687 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
688
689 /* swap sv_flags */
690 SvFLAGS (&tmp) = SvFLAGS (a);
691 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
692 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
693
694#if PERL_VERSION_ATLEAST (5,10,0)
695 /* perl 5.10 and later complicates this _quite_ a bit, but it also
696 * is much faster, so no quarrels here. alternatively, we could
697 * sv_upgrade to avoid this.
698 */
699 {
700 /* swap sv_u */
701 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
702
703 /* if SvANY points to the head, we need to adjust the pointers,
704 * as the pointer for a still points to b, and maybe vice versa.
705 */
706 #define svany_in_head(type) \
707 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
708
709 if (svany_in_head (SvTYPE (a)))
710 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
711
712 if (svany_in_head (SvTYPE (b)))
713 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
246 } 714 }
247}
248#endif 715#endif
249
250/* the next two functions merely cache the padlists */
251STATIC void
252get_padlist (CV *cv)
253{
254 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256 if (he && AvFILLp ((AV *)*he) >= 0)
257 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258 else
259 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260} 716}
261 717
262STATIC void 718/* swap sv heads, at least logically */
263put_padlist (CV *cv)
264{
265 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267 if (SvTYPE (*he) != SVt_PVAV)
268 {
269 SvREFCNT_dec (*he);
270 *he = (SV *)newAV ();
271 }
272
273 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
274}
275
276#ifdef MAY_FLUSH
277STATIC void
278flush_padlist_cache ()
279{
280 HV *hv = padlist_cache;
281 padlist_cache = newHV ();
282
283 if (hv_iterinit (hv))
284 {
285 HE *he;
286 AV *padlist;
287
288 while (!!(he = hv_iternext (hv)))
289 {
290 AV *av = (AV *)HeVAL(he);
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (padlist);
295 }
296 }
297
298 SvREFCNT_dec (hv);
299}
300#endif
301
302#define SB do {
303#define SE } while (0)
304
305#define LOAD(state) load_state(aTHX_ (state));
306#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
309
310static void 719static void
720swap_svs (pTHX_ Coro__State c)
721{
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
725 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
726}
727
728#define SWAP_SVS(coro) \
729 if (ecb_expect_false ((coro)->swap_sv)) \
730 swap_svs (aTHX_ (coro))
731
732static void
733on_enterleave_call (pTHX_ SV *cb);
734
735static void
311load_state(pTHX_ Coro__State c) 736load_perl (pTHX_ Coro__State c)
312{ 737{
313 PL_dowarn = c->dowarn; 738 perl_slots *slot = c->slot;
314 PL_in_eval = c->in_eval; 739 c->slot = 0;
315 740
316 PL_curstackinfo = c->curstackinfo;
317 PL_curstack = c->curstack;
318 PL_mainstack = c->mainstack; 741 PL_mainstack = c->mainstack;
319 PL_stack_sp = c->stack_sp;
320 PL_op = c->op;
321 PL_curpad = c->curpad;
322 PL_comppad = c->comppad;
323 PL_stack_base = c->stack_base;
324 PL_stack_max = c->stack_max;
325 PL_tmps_stack = c->tmps_stack;
326 PL_tmps_floor = c->tmps_floor;
327 PL_tmps_ix = c->tmps_ix;
328 PL_tmps_max = c->tmps_max;
329 PL_markstack = c->markstack;
330 PL_markstack_ptr = c->markstack_ptr;
331 PL_markstack_max = c->markstack_max;
332 PL_scopestack = c->scopestack;
333 PL_scopestack_ix = c->scopestack_ix;
334 PL_scopestack_max = c->scopestack_max;
335 PL_savestack = c->savestack;
336 PL_savestack_ix = c->savestack_ix;
337 PL_savestack_max = c->savestack_max;
338 PL_retstack = c->retstack;
339 PL_retstack_ix = c->retstack_ix;
340 PL_retstack_max = c->retstack_max;
341 PL_curcop = c->curcop;
342 PL_top_env = c->top_env;
343 742
344 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 743#if CORO_JIT
345 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 744 load_perl_slots (slot);
346 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 745#else
746 #define VARx(name,expr,type) expr = slot->name;
747 #include "state.h"
748#endif
347 749
348 { 750 {
349 dSP; 751 dSP;
752
350 CV *cv; 753 CV *cv;
351 754
352 /* now do the ugly restore mess */ 755 /* now do the ugly restore mess */
353 while ((cv = (CV *)POPs)) 756 while (ecb_expect_true (cv = (CV *)POPs))
354 { 757 {
355 AV *padlist = (AV *)POPs;
356
357 if (padlist)
358 {
359 put_padlist (cv); /* mark this padlist as available */ 758 put_padlist (aTHX_ cv); /* mark this padlist as available */
360 CvPADLIST(cv) = padlist; 759 CvDEPTH (cv) = PTR2IV (POPs);
361#ifdef USE_THREADS 760 CvPADLIST (cv) = (PADLIST *)POPs;
362 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363#endif
364 }
365
366 ++CvDEPTH(cv);
367 } 761 }
368 762
369 PUTBACK; 763 PUTBACK;
370 } 764 }
371}
372 765
766 slf_frame = c->slf_frame;
767 CORO_THROW = c->except;
768
769 if (ecb_expect_false (enable_times))
770 {
771 if (ecb_expect_false (!times_valid))
772 coro_times_update ();
773
774 coro_times_sub (c);
775 }
776
777 if (ecb_expect_false (c->on_enter))
778 {
779 int i;
780
781 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
783 }
784
785 SWAP_SVS (c);
786}
787
373static void 788static void
374save_state(pTHX_ Coro__State c, int flags) 789save_perl (pTHX_ Coro__State c)
375{ 790{
791 SWAP_SVS (c);
792
793 if (ecb_expect_false (c->on_leave))
794 {
795 int i;
796
797 for (i = AvFILLp (c->on_leave); i >= 0; --i)
798 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
799 }
800
801 times_valid = 0;
802
803 if (ecb_expect_false (enable_times))
804 {
805 coro_times_update (); times_valid = 1;
806 coro_times_add (c);
807 }
808
809 c->except = CORO_THROW;
810 c->slf_frame = slf_frame;
811
376 { 812 {
377 dSP; 813 dSP;
378 I32 cxix = cxstack_ix; 814 I32 cxix = cxstack_ix;
379 PERL_CONTEXT *ccstk = cxstack; 815 PERL_CONTEXT *ccstk = cxstack;
380 PERL_SI *top_si = PL_curstackinfo; 816 PERL_SI *top_si = PL_curstackinfo;
… …
382 /* 818 /*
383 * the worst thing you can imagine happens first - we have to save 819 * the worst thing you can imagine happens first - we have to save
384 * (and reinitialize) all cv's in the whole callchain :( 820 * (and reinitialize) all cv's in the whole callchain :(
385 */ 821 */
386 822
387 PUSHs (Nullsv); 823 XPUSHs (Nullsv);
388 /* this loop was inspired by pp_caller */ 824 /* this loop was inspired by pp_caller */
389 for (;;) 825 for (;;)
390 { 826 {
391 while (cxix >= 0) 827 while (ecb_expect_true (cxix >= 0))
392 { 828 {
393 PERL_CONTEXT *cx = &ccstk[cxix--]; 829 PERL_CONTEXT *cx = &ccstk[cxix--];
394 830
395 if (CxTYPE(cx) == CXt_SUB) 831 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
396 { 832 {
397 CV *cv = cx->blk_sub.cv; 833 CV *cv = cx->blk_sub.cv;
834
398 if (CvDEPTH(cv)) 835 if (ecb_expect_true (CvDEPTH (cv)))
399 { 836 {
400#ifdef USE_THREADS
401 /*XPUSHs ((SV *)CvOWNER(cv));*/
402 /*CvOWNER(cv) = 0;*/
403 /*error must unlock this cv etc.. etc...*/
404#endif
405 EXTEND (SP, CvDEPTH(cv)*2); 837 EXTEND (SP, 3);
406
407 while (--CvDEPTH(cv))
408 {
409 /* this tells the restore code to increment CvDEPTH */
410 PUSHs (Nullsv);
411 PUSHs ((SV *)cv);
412 }
413
414 PUSHs ((SV *)CvPADLIST(cv)); 838 PUSHs ((SV *)CvPADLIST (cv));
839 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
415 PUSHs ((SV *)cv); 840 PUSHs ((SV *)cv);
416 841
417 get_padlist (cv); /* this is a monster */ 842 CvDEPTH (cv) = 0;
843 get_padlist (aTHX_ cv);
418 } 844 }
419 } 845 }
420#ifdef CXt_FORMAT
421 else if (CxTYPE(cx) == CXt_FORMAT)
422 {
423 /* I never used formats, so how should I know how these are implemented? */
424 /* my bold guess is as a simple, plain sub... */
425 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426 }
427#endif
428 } 846 }
429 847
430 if (top_si->si_type == PERLSI_MAIN) 848 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
431 break; 849 break;
432 850
433 top_si = top_si->si_prev; 851 top_si = top_si->si_prev;
434 ccstk = top_si->si_cxstack; 852 ccstk = top_si->si_cxstack;
435 cxix = top_si->si_cxix; 853 cxix = top_si->si_cxix;
436 } 854 }
437 855
438 PUTBACK; 856 PUTBACK;
439 } 857 }
440 858
441 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 859 /* allocate some space on the context stack for our purposes */
442 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 860 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
443 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 861 {
862 unsigned int i;
444 863
445 c->dowarn = PL_dowarn; 864 for (i = 0; i < SLOT_COUNT; ++i)
446 c->in_eval = PL_in_eval; 865 CXINC;
447 866
448 c->curstackinfo = PL_curstackinfo; 867 cxstack_ix -= SLOT_COUNT; /* undo allocation */
449 c->curstack = PL_curstack; 868 }
869
450 c->mainstack = PL_mainstack; 870 c->mainstack = PL_mainstack;
451 c->stack_sp = PL_stack_sp; 871
452 c->op = PL_op; 872 {
453 c->curpad = PL_curpad; 873 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
454 c->comppad = PL_comppad; 874
455 c->stack_base = PL_stack_base; 875#if CORO_JIT
456 c->stack_max = PL_stack_max; 876 save_perl_slots (slot);
457 c->tmps_stack = PL_tmps_stack; 877#else
458 c->tmps_floor = PL_tmps_floor; 878 #define VARx(name,expr,type) slot->name = expr;
459 c->tmps_ix = PL_tmps_ix; 879 #include "state.h"
460 c->tmps_max = PL_tmps_max; 880#endif
461 c->markstack = PL_markstack; 881 }
462 c->markstack_ptr = PL_markstack_ptr;
463 c->markstack_max = PL_markstack_max;
464 c->scopestack = PL_scopestack;
465 c->scopestack_ix = PL_scopestack_ix;
466 c->scopestack_max = PL_scopestack_max;
467 c->savestack = PL_savestack;
468 c->savestack_ix = PL_savestack_ix;
469 c->savestack_max = PL_savestack_max;
470 c->retstack = PL_retstack;
471 c->retstack_ix = PL_retstack_ix;
472 c->retstack_max = PL_retstack_max;
473 c->curcop = PL_curcop;
474 c->top_env = PL_top_env;
475} 882}
476 883
477/* 884/*
478 * allocate various perl stacks. This is an exact copy 885 * allocate various perl stacks. This is almost an exact copy
479 * of perl.c:init_stacks, except that it uses less memory 886 * of perl.c:init_stacks, except that it uses less memory
480 * on the assumption that coroutines do not usually need 887 * on the (sometimes correct) assumption that coroutines do
481 * a lot of stackspace. 888 * not usually need a lot of stackspace.
482 */ 889 */
483STATIC void 890#if CORO_PREFER_PERL_FUNCTIONS
891# define coro_init_stacks(thx) init_stacks ()
892#else
893static void
484coro_init_stacks (pTHX) 894coro_init_stacks (pTHX)
485{ 895{
486 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 896 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
487 PL_curstackinfo->si_type = PERLSI_MAIN; 897 PL_curstackinfo->si_type = PERLSI_MAIN;
488 PL_curstack = PL_curstackinfo->si_stack; 898 PL_curstack = PL_curstackinfo->si_stack;
489 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 899 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490 900
491 PL_stack_base = AvARRAY(PL_curstack); 901 PL_stack_base = AvARRAY(PL_curstack);
492 PL_stack_sp = PL_stack_base; 902 PL_stack_sp = PL_stack_base;
493 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 903 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494 904
495 New(50,PL_tmps_stack,96,SV*); 905 New(50,PL_tmps_stack,32,SV*);
496 PL_tmps_floor = -1; 906 PL_tmps_floor = -1;
497 PL_tmps_ix = -1; 907 PL_tmps_ix = -1;
498 PL_tmps_max = 96; 908 PL_tmps_max = 32;
499 909
500 New(54,PL_markstack,16,I32); 910 New(54,PL_markstack,16,I32);
501 PL_markstack_ptr = PL_markstack; 911 PL_markstack_ptr = PL_markstack;
502 PL_markstack_max = PL_markstack + 16; 912 PL_markstack_max = PL_markstack + 16;
503 913
504#ifdef SET_MARK_OFFSET 914#ifdef SET_MARK_OFFSET
505 SET_MARK_OFFSET; 915 SET_MARK_OFFSET;
506#endif 916#endif
507 917
508 New(54,PL_scopestack,16,I32); 918 New(54,PL_scopestack,8,I32);
509 PL_scopestack_ix = 0; 919 PL_scopestack_ix = 0;
510 PL_scopestack_max = 16; 920 PL_scopestack_max = 8;
921#if HAS_SCOPESTACK_NAME
922 New(54,PL_scopestack_name,8,const char*);
923#endif
511 924
512 New(54,PL_savestack,96,ANY); 925 New(54,PL_savestack,24,ANY);
513 PL_savestack_ix = 0; 926 PL_savestack_ix = 0;
514 PL_savestack_max = 96; 927 PL_savestack_max = 24;
515 928
929#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,8,OP*); 930 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 931 PL_retstack_ix = 0;
518 PL_retstack_max = 8; 932 PL_retstack_max = 4;
933#endif
519} 934}
935#endif
520 936
521/* 937/*
522 * destroy the stacks, the callchain etc... 938 * destroy the stacks, the callchain etc...
523 */ 939 */
524STATIC void 940static void
525destroy_stacks(pTHX) 941coro_destruct_stacks (pTHX)
526{ 942{
527 if (!IN_DESTRUCT)
528 {
529 /* is this ugly, I ask? */
530 while (PL_scopestack_ix)
531 LEAVE;
532
533 /* sure it is, but more important: is it correct?? :/ */
534 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
535 FREETMPS;
536 }
537
538 while (PL_curstackinfo->si_next) 943 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 944 PL_curstackinfo = PL_curstackinfo->si_next;
540 945
541 while (PL_curstackinfo) 946 while (PL_curstackinfo)
542 { 947 {
543 PERL_SI *p = PL_curstackinfo->si_prev; 948 PERL_SI *p = PL_curstackinfo->si_prev;
544 949
545 {
546 dSP;
547 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548 PUTBACK; /* possibly superfluous */
549 }
550
551 if (!IN_DESTRUCT) 950 if (!IN_DESTRUCT)
552 {
553 dounwind(-1);
554 SvREFCNT_dec(PL_curstackinfo->si_stack); 951 SvREFCNT_dec (PL_curstackinfo->si_stack);
555 }
556 952
557 Safefree(PL_curstackinfo->si_cxstack); 953 Safefree (PL_curstackinfo->si_cxstack);
558 Safefree(PL_curstackinfo); 954 Safefree (PL_curstackinfo);
559 PL_curstackinfo = p; 955 PL_curstackinfo = p;
560 } 956 }
561 957
562 Safefree(PL_tmps_stack); 958 Safefree (PL_tmps_stack);
563 Safefree(PL_markstack); 959 Safefree (PL_markstack);
564 Safefree(PL_scopestack); 960 Safefree (PL_scopestack);
961#if HAS_SCOPESTACK_NAME
962 Safefree (PL_scopestack_name);
963#endif
565 Safefree(PL_savestack); 964 Safefree (PL_savestack);
965#if !PERL_VERSION_ATLEAST (5,10,0)
566 Safefree(PL_retstack); 966 Safefree (PL_retstack);
567}
568
569static void
570allocate_stack (Coro__State ctx, int alloc)
571{
572 coro_stack *stack;
573
574 New (0, stack, 1, coro_stack);
575
576 stack->refcnt = 1;
577 stack->usecnt = 1;
578 stack->gencnt = ctx->gencnt = 0;
579 if (alloc)
580 {
581#if HAVE_MMAP
582 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
583 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584 if (stack->sptr == (void *)-1)
585#endif 967#endif
968}
969
970#define CORO_RSS \
971 rss += sizeof (SYM (curstackinfo)); \
972 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
973 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
974 rss += SYM (tmps_max) * sizeof (SV *); \
975 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
976 rss += SYM (scopestack_max) * sizeof (I32); \
977 rss += SYM (savestack_max) * sizeof (ANY);
978
979static size_t
980coro_rss (pTHX_ struct coro *coro)
981{
982 size_t rss = sizeof (*coro);
983
984 if (coro->mainstack)
985 {
986 if (coro->flags & CF_RUNNING)
586 { 987 {
587 /*FIXME*//*D*//* reasonable stack size! */ 988 #define SYM(sym) PL_ ## sym
588 stack->ssize = -4096 * sizeof (long); 989 CORO_RSS;
589 New (0, stack->sptr, 4096, long); 990 #undef SYM
590 } 991 }
591 }
592 else 992 else
593 stack->sptr = 0;
594
595 ctx->stack = stack;
596}
597
598static void
599deallocate_stack (Coro__State ctx)
600{
601 coro_stack *stack = ctx->stack;
602
603 ctx->stack = 0;
604
605 if (stack)
606 {
607 if (!--stack->refcnt)
608 { 993 {
609#ifdef HAVE_MMAP 994 #define SYM(sym) coro->slot->sym
610 if (stack->ssize > 0 && stack->sptr) 995 CORO_RSS;
611 munmap (stack->sptr, stack->ssize); 996 #undef SYM
997 }
998 }
999
1000 return rss;
1001}
1002
1003/** coroutine stack handling ************************************************/
1004
1005static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1006static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1007static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1008
1009/* apparently < 5.8.8 */
1010#ifndef MgPV_nolen_const
1011#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1012 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1013 (const char*)(mg)->mg_ptr)
1014#endif
1015
1016/*
1017 * This overrides the default magic get method of %SIG elements.
1018 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1019 * and instead of trying to save and restore the hash elements (extremely slow),
1020 * we just provide our own readback here.
1021 */
1022static int ecb_cold
1023coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1024{
1025 const char *s = MgPV_nolen_const (mg);
1026
1027 if (*s == '_')
1028 {
1029 SV **svp = 0;
1030
1031 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1032 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1033
1034 if (svp)
1035 {
1036 SV *ssv;
1037
1038 if (!*svp)
1039 ssv = &PL_sv_undef;
1040 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1041 ssv = sv_2mortal (newRV_inc (*svp));
612 else 1042 else
613#endif 1043 ssv = *svp;
614 Safefree (stack->sptr);
615 1044
616 Safefree (stack); 1045 sv_setsv (sv, ssv);
1046 return 0;
617 } 1047 }
618 else if (ctx->gencnt == stack->gencnt) 1048 }
619 --stack->usecnt; 1049
1050 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1051}
1052
1053static int ecb_cold
1054coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1055{
1056 const char *s = MgPV_nolen_const (mg);
1057
1058 if (*s == '_')
620 } 1059 {
621} 1060 SV **svp = 0;
622 1061
1062 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1063 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1064
1065 if (svp)
1066 {
1067 SV *old = *svp;
1068 *svp = 0;
1069 SvREFCNT_dec (old);
1070 return 0;
1071 }
1072 }
1073
1074 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1075}
1076
1077static int ecb_cold
1078coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1079{
1080 const char *s = MgPV_nolen_const (mg);
1081
1082 if (*s == '_')
1083 {
1084 SV **svp = 0;
1085
1086 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1087 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1088
1089 if (svp)
1090 {
1091 SV *old = *svp;
1092 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1093 SvREFCNT_dec (old);
1094 return 0;
1095 }
1096 }
1097
1098 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1099}
1100
1101static void
1102prepare_nop (pTHX_ struct coro_transfer_args *ta)
1103{
1104 /* kind of mega-hacky, but works */
1105 ta->next = ta->prev = (struct coro *)ta;
1106}
1107
623static void 1108static int
624setup_coro (void *arg) 1109slf_check_nop (pTHX_ struct CoroSLF *frame)
1110{
1111 return 0;
1112}
1113
1114static int
1115slf_check_repeat (pTHX_ struct CoroSLF *frame)
1116{
1117 return 1;
1118}
1119
1120static UNOP init_perl_op;
1121
1122ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1123init_perl (pTHX_ struct coro *coro)
625{ 1124{
626 /* 1125 /*
627 * emulate part of the perl startup here. 1126 * emulate part of the perl startup here.
628 */ 1127 */
1128 coro_init_stacks (aTHX);
1129
1130 PL_runops = RUNOPS_DEFAULT;
1131 PL_curcop = &PL_compiling;
1132 PL_in_eval = EVAL_NULL;
1133 PL_comppad = 0;
1134 PL_comppad_name = 0;
1135 PL_comppad_name_fill = 0;
1136 PL_comppad_name_floor = 0;
1137 PL_curpm = 0;
1138 PL_curpad = 0;
1139 PL_localizing = 0;
1140 PL_restartop = 0;
1141#if PERL_VERSION_ATLEAST (5,10,0)
1142 PL_parser = 0;
1143#endif
1144 PL_hints = 0;
1145
1146 /* recreate the die/warn hooks */
1147 PL_diehook = SvREFCNT_inc (rv_diehook);
1148 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1149
1150 GvSV (PL_defgv) = newSV (0);
1151 GvAV (PL_defgv) = coro->args; coro->args = 0;
1152 GvSV (PL_errgv) = newSV (0);
1153 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1154 GvHV (PL_hintgv) = newHV ();
1155#if PERL_VERSION_ATLEAST (5,10,0)
1156 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1157#endif
1158 PL_rs = newSVsv (GvSV (irsgv));
1159 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1160
1161 {
1162 dSP;
1163 UNOP myop;
1164
1165 Zero (&myop, 1, UNOP);
1166 myop.op_next = Nullop;
1167 myop.op_type = OP_ENTERSUB;
1168 myop.op_flags = OPf_WANT_VOID;
1169
1170 PUSHMARK (SP);
1171 PUSHs ((SV *)coro->startcv);
1172 PUTBACK;
1173 PL_op = (OP *)&myop;
1174 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1175 }
1176
1177 /* this newly created coroutine might be run on an existing cctx which most
1178 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1179 */
1180 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1181 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1182 slf_frame.destroy = 0;
1183
1184 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1185 init_perl_op.op_next = PL_op;
1186 init_perl_op.op_type = OP_ENTERSUB;
1187 init_perl_op.op_ppaddr = pp_slf;
1188 /* no flags etc. required, as an init function won't be called */
1189
1190 PL_op = (OP *)&init_perl_op;
1191
1192 /* copy throw, in case it was set before init_perl */
1193 CORO_THROW = coro->except;
1194
1195 SWAP_SVS (coro);
1196
1197 if (ecb_expect_false (enable_times))
1198 {
1199 coro_times_update ();
1200 coro_times_sub (coro);
1201 }
1202}
1203
1204static void
1205coro_unwind_stacks (pTHX)
1206{
1207 if (!IN_DESTRUCT)
1208 {
1209 /* restore all saved variables and stuff */
1210 LEAVE_SCOPE (0);
1211 assert (PL_tmps_floor == -1);
1212
1213 /* free all temporaries */
1214 FREETMPS;
1215 assert (PL_tmps_ix == -1);
1216
1217 /* unwind all extra stacks */
1218 POPSTACK_TO (PL_mainstack);
1219
1220 /* unwind main stack */
1221 dounwind (-1);
1222 }
1223}
1224
1225static void
1226destroy_perl (pTHX_ struct coro *coro)
1227{
1228 SV *svf [9];
1229
1230 {
1231 SV *old_current = SvRV (coro_current);
1232 struct coro *current = SvSTATE (old_current);
1233
1234 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1235
1236 save_perl (aTHX_ current);
1237
1238 /* this will cause transfer_check to croak on block*/
1239 SvRV_set (coro_current, (SV *)coro->hv);
1240
1241 load_perl (aTHX_ coro);
1242
1243 coro_unwind_stacks (aTHX);
1244
1245 /* restore swapped sv's */
1246 SWAP_SVS (coro);
1247
1248 coro_destruct_stacks (aTHX);
1249
1250 /* now save some sv's to be free'd later */
1251 svf [0] = GvSV (PL_defgv);
1252 svf [1] = (SV *)GvAV (PL_defgv);
1253 svf [2] = GvSV (PL_errgv);
1254 svf [3] = (SV *)PL_defoutgv;
1255 svf [4] = PL_rs;
1256 svf [5] = GvSV (irsgv);
1257 svf [6] = (SV *)GvHV (PL_hintgv);
1258 svf [7] = PL_diehook;
1259 svf [8] = PL_warnhook;
1260 assert (9 == sizeof (svf) / sizeof (*svf));
1261
1262 SvRV_set (coro_current, old_current);
1263
1264 load_perl (aTHX_ current);
1265 }
1266
1267 {
1268 unsigned int i;
1269
1270 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1271 SvREFCNT_dec (svf [i]);
1272
1273 SvREFCNT_dec (coro->saved_deffh);
1274 SvREFCNT_dec (coro->rouse_cb);
1275 SvREFCNT_dec (coro->invoke_cb);
1276 SvREFCNT_dec (coro->invoke_av);
1277 }
1278}
1279
1280ecb_inline void
1281free_coro_mortal (pTHX)
1282{
1283 if (ecb_expect_true (coro_mortal))
1284 {
1285 SvREFCNT_dec ((SV *)coro_mortal);
1286 coro_mortal = 0;
1287 }
1288}
1289
1290static int
1291runops_trace (pTHX)
1292{
1293 COP *oldcop = 0;
1294 int oldcxix = -2;
1295
1296 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1297 {
1298 PERL_ASYNC_CHECK ();
1299
1300 if (cctx_current->flags & CC_TRACE_ALL)
1301 {
1302 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1303 {
1304 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1305 SV **bot, **top;
1306 AV *av = newAV (); /* return values */
1307 SV **cb;
1308 dSP;
1309
1310 GV *gv = CvGV (cx->blk_sub.cv);
1311 SV *fullname = sv_2mortal (newSV (0));
1312 if (isGV (gv))
1313 gv_efullname3 (fullname, gv, 0);
1314
1315 bot = PL_stack_base + cx->blk_oldsp + 1;
1316 top = cx->blk_gimme == G_ARRAY ? SP + 1
1317 : cx->blk_gimme == G_SCALAR ? bot + 1
1318 : bot;
1319
1320 av_extend (av, top - bot);
1321 while (bot < top)
1322 av_push (av, SvREFCNT_inc_NN (*bot++));
1323
1324 PL_runops = RUNOPS_DEFAULT;
1325 ENTER;
1326 SAVETMPS;
1327 EXTEND (SP, 3);
1328 PUSHMARK (SP);
1329 PUSHs (&PL_sv_no);
1330 PUSHs (fullname);
1331 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1332 PUTBACK;
1333 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1334 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1335 SPAGAIN;
1336 FREETMPS;
1337 LEAVE;
1338 PL_runops = runops_trace;
1339 }
1340
1341 if (oldcop != PL_curcop)
1342 {
1343 oldcop = PL_curcop;
1344
1345 if (PL_curcop != &PL_compiling)
1346 {
1347 SV **cb;
1348
1349 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1350 {
1351 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1352
1353 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1354 {
1355 dSP;
1356 GV *gv = CvGV (cx->blk_sub.cv);
1357 SV *fullname = sv_2mortal (newSV (0));
1358
1359 if (isGV (gv))
1360 gv_efullname3 (fullname, gv, 0);
1361
1362 PL_runops = RUNOPS_DEFAULT;
1363 ENTER;
1364 SAVETMPS;
1365 EXTEND (SP, 3);
1366 PUSHMARK (SP);
1367 PUSHs (&PL_sv_yes);
1368 PUSHs (fullname);
1369 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1370 PUTBACK;
1371 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1372 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1373 SPAGAIN;
1374 FREETMPS;
1375 LEAVE;
1376 PL_runops = runops_trace;
1377 }
1378
1379 oldcxix = cxstack_ix;
1380 }
1381
1382 if (cctx_current->flags & CC_TRACE_LINE)
1383 {
1384 dSP;
1385
1386 PL_runops = RUNOPS_DEFAULT;
1387 ENTER;
1388 SAVETMPS;
1389 EXTEND (SP, 3);
1390 PL_runops = RUNOPS_DEFAULT;
1391 PUSHMARK (SP);
1392 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1393 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1394 PUTBACK;
1395 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1396 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1397 SPAGAIN;
1398 FREETMPS;
1399 LEAVE;
1400 PL_runops = runops_trace;
1401 }
1402 }
1403 }
1404 }
1405 }
1406
1407 TAINT_NOT;
1408 return 0;
1409}
1410
1411static struct CoroSLF cctx_ssl_frame;
1412
1413static void
1414slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1415{
1416 ta->prev = 0;
1417}
1418
1419static int
1420slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1421{
1422 *frame = cctx_ssl_frame;
1423
1424 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1425}
1426
1427/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1428static void ecb_noinline
1429cctx_prepare (pTHX)
1430{
1431 PL_top_env = &PL_start_env;
1432
1433 if (cctx_current->flags & CC_TRACE)
1434 PL_runops = runops_trace;
1435
1436 /* we already must be executing an SLF op, there is no other valid way
1437 * that can lead to creation of a new cctx */
1438 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1439 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1440
1441 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1442 cctx_ssl_frame = slf_frame;
1443
1444 slf_frame.prepare = slf_prepare_set_stacklevel;
1445 slf_frame.check = slf_check_set_stacklevel;
1446}
1447
1448/* the tail of transfer: execute stuff we can only do after a transfer */
1449ecb_inline void
1450transfer_tail (pTHX)
1451{
1452 free_coro_mortal (aTHX);
1453}
1454
1455/* try to exit the same way perl's main function would do */
1456/* we do not bother resetting the environment or other things *7
1457/* that are not, uhm, essential */
1458/* this obviously also doesn't work when perl is embedded */
1459static void ecb_noinline ecb_cold
1460perlish_exit (pTHX)
1461{
1462 int exitstatus = perl_destruct (PL_curinterp);
1463 perl_free (PL_curinterp);
1464 exit (exitstatus);
1465}
1466
1467/*
1468 * this is a _very_ stripped down perl interpreter ;)
1469 */
1470static void
1471cctx_run (void *arg)
1472{
1473#ifdef USE_ITHREADS
1474# if CORO_PTHREAD
1475 PERL_SET_CONTEXT (coro_thx);
1476# endif
1477#endif
1478 {
1479 dTHX;
1480
1481 /* normally we would need to skip the entersub here */
1482 /* not doing so will re-execute it, which is exactly what we want */
1483 /* PL_nop = PL_nop->op_next */
1484
1485 /* inject a fake subroutine call to cctx_init */
1486 cctx_prepare (aTHX);
1487
1488 /* cctx_run is the alternative tail of transfer() */
1489 transfer_tail (aTHX);
1490
1491 /* somebody or something will hit me for both perl_run and PL_restartop */
1492 PL_restartop = PL_op;
1493 perl_run (PL_curinterp);
1494 /*
1495 * Unfortunately, there is no way to get at the return values of the
1496 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1497 * runtime errors here, as this is just a random interpreter, not a thread.
1498 */
1499
1500 /*
1501 * If perl-run returns we assume exit() was being called or the coro
1502 * fell off the end, which seems to be the only valid (non-bug)
1503 * reason for perl_run to return. We try to mimic whatever perl is normally
1504 * doing in that case. YMMV.
1505 */
1506 perlish_exit (aTHX);
1507 }
1508}
1509
1510static coro_cctx *
1511cctx_new (void)
1512{
1513 coro_cctx *cctx;
1514
1515 ++cctx_count;
1516 New (0, cctx, 1, coro_cctx);
1517
1518 cctx->gen = cctx_gen;
1519 cctx->flags = 0;
1520 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1521
1522 return cctx;
1523}
1524
1525/* create a new cctx only suitable as source */
1526static coro_cctx *
1527cctx_new_empty (void)
1528{
1529 coro_cctx *cctx = cctx_new ();
1530
1531 cctx->stack.sptr = 0;
1532 coro_create (&cctx->cctx, 0, 0, 0, 0);
1533
1534 return cctx;
1535}
1536
1537/* create a new cctx suitable as destination/running a perl interpreter */
1538static coro_cctx *
1539cctx_new_run (void)
1540{
1541 coro_cctx *cctx = cctx_new ();
1542
1543 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1544 {
1545 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1546 _exit (EXIT_FAILURE);
1547 }
1548
1549 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1550
1551 return cctx;
1552}
1553
1554static void
1555cctx_destroy (coro_cctx *cctx)
1556{
1557 if (!cctx)
1558 return;
1559
1560 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1561
1562 --cctx_count;
1563 coro_destroy (&cctx->cctx);
1564
1565 coro_stack_free (&cctx->stack);
1566
1567 Safefree (cctx);
1568}
1569
1570/* wether this cctx should be destructed */
1571#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1572
1573static coro_cctx *
1574cctx_get (pTHX)
1575{
1576 while (ecb_expect_true (cctx_first))
1577 {
1578 coro_cctx *cctx = cctx_first;
1579 cctx_first = cctx->next;
1580 --cctx_idle;
1581
1582 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1583 return cctx;
1584
1585 cctx_destroy (cctx);
1586 }
1587
1588 return cctx_new_run ();
1589}
1590
1591static void
1592cctx_put (coro_cctx *cctx)
1593{
1594 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1595
1596 /* free another cctx if overlimit */
1597 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1598 {
1599 coro_cctx *first = cctx_first;
1600 cctx_first = first->next;
1601 --cctx_idle;
1602
1603 cctx_destroy (first);
1604 }
1605
1606 ++cctx_idle;
1607 cctx->next = cctx_first;
1608 cctx_first = cctx;
1609}
1610
1611/** coroutine switching *****************************************************/
1612
1613static void
1614transfer_check (pTHX_ struct coro *prev, struct coro *next)
1615{
1616 /* TODO: throwing up here is considered harmful */
1617
1618 if (ecb_expect_true (prev != next))
1619 {
1620 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1621 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1622
1623 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1624 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1625
1626#if !PERL_VERSION_ATLEAST (5,10,0)
1627 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1628 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1629#endif
1630 }
1631}
1632
1633/* always use the TRANSFER macro */
1634static void ecb_noinline /* noinline so we have a fixed stackframe */
1635transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1636{
1637 dSTACKLEVEL;
1638
1639 /* sometimes transfer is only called to set idle_sp */
1640 if (ecb_expect_false (!prev))
1641 {
1642 cctx_current->idle_sp = STACKLEVEL;
1643 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1644 }
1645 else if (ecb_expect_true (prev != next))
1646 {
1647 coro_cctx *cctx_prev;
1648
1649 if (ecb_expect_false (prev->flags & CF_NEW))
1650 {
1651 /* create a new empty/source context */
1652 prev->flags &= ~CF_NEW;
1653 prev->flags |= CF_RUNNING;
1654 }
1655
1656 prev->flags &= ~CF_RUNNING;
1657 next->flags |= CF_RUNNING;
1658
1659 /* first get rid of the old state */
1660 save_perl (aTHX_ prev);
1661
1662 if (ecb_expect_false (next->flags & CF_NEW))
1663 {
1664 /* need to start coroutine */
1665 next->flags &= ~CF_NEW;
1666 /* setup coroutine call */
1667 init_perl (aTHX_ next);
1668 }
1669 else
1670 load_perl (aTHX_ next);
1671
1672 /* possibly untie and reuse the cctx */
1673 if (ecb_expect_true (
1674 cctx_current->idle_sp == STACKLEVEL
1675 && !(cctx_current->flags & CC_TRACE)
1676 && !force_cctx
1677 ))
1678 {
1679 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1680 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1681
1682 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1683 /* without this the next cctx_get might destroy the running cctx while still in use */
1684 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1685 if (ecb_expect_true (!next->cctx))
1686 next->cctx = cctx_get (aTHX);
1687
1688 cctx_put (cctx_current);
1689 }
1690 else
1691 prev->cctx = cctx_current;
1692
1693 ++next->usecount;
1694
1695 cctx_prev = cctx_current;
1696 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1697
1698 next->cctx = 0;
1699
1700 if (ecb_expect_false (cctx_prev != cctx_current))
1701 {
1702 cctx_prev->top_env = PL_top_env;
1703 PL_top_env = cctx_current->top_env;
1704 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1705 }
1706
1707 transfer_tail (aTHX);
1708 }
1709}
1710
1711#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1712#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1713
1714/** high level stuff ********************************************************/
1715
1716/* this function is actually Coro, not Coro::State, but we call it from here */
1717/* because it is convenient - but it hasn't been declared yet for that reason */
1718static void
1719coro_call_on_destroy (pTHX_ struct coro *coro);
1720
1721static void
1722coro_state_destroy (pTHX_ struct coro *coro)
1723{
1724 if (coro->flags & CF_ZOMBIE)
1725 return;
1726
1727 slf_destroy (aTHX_ coro);
1728
1729 coro->flags |= CF_ZOMBIE;
1730
1731 if (coro->flags & CF_READY)
1732 {
1733 /* reduce nready, as destroying a ready coro effectively unreadies it */
1734 /* alternative: look through all ready queues and remove the coro */
1735 --coro_nready;
1736 }
1737 else
1738 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1739
1740 if (coro->next) coro->next->prev = coro->prev;
1741 if (coro->prev) coro->prev->next = coro->next;
1742 if (coro == coro_first) coro_first = coro->next;
1743
1744 if (coro->mainstack
1745 && coro->mainstack != main_mainstack
1746 && coro->slot
1747 && !PL_dirty)
1748 destroy_perl (aTHX_ coro);
1749
1750 cctx_destroy (coro->cctx);
1751 SvREFCNT_dec (coro->startcv);
1752 SvREFCNT_dec (coro->args);
1753 SvREFCNT_dec (coro->swap_sv);
1754 SvREFCNT_dec (CORO_THROW);
1755
1756 coro_call_on_destroy (aTHX_ coro);
1757
1758 /* more destruction mayhem in coro_state_free */
1759}
1760
1761static int
1762coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1763{
1764 struct coro *coro = (struct coro *)mg->mg_ptr;
1765 mg->mg_ptr = 0;
1766
1767 coro_state_destroy (aTHX_ coro);
1768 SvREFCNT_dec (coro->on_destroy);
1769 SvREFCNT_dec (coro->status);
1770
1771 Safefree (coro);
1772
1773 return 0;
1774}
1775
1776static int ecb_cold
1777coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1778{
1779 /* called when perl clones the current process the slow way (windows process emulation) */
1780 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1781 mg->mg_ptr = 0;
1782 mg->mg_virtual = 0;
1783
1784 return 0;
1785}
1786
1787static MGVTBL coro_state_vtbl = {
1788 0, 0, 0, 0,
1789 coro_state_free,
1790 0,
1791#ifdef MGf_DUP
1792 coro_state_dup,
1793#else
1794# define MGf_DUP 0
1795#endif
1796};
1797
1798static void
1799prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1800{
1801 ta->prev = SvSTATE (prev_sv);
1802 ta->next = SvSTATE (next_sv);
1803 TRANSFER_CHECK (*ta);
1804}
1805
1806static void
1807api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1808{
1809 struct coro_transfer_args ta;
1810
1811 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1812 TRANSFER (ta, 1);
1813}
1814
1815/** Coro ********************************************************************/
1816
1817ecb_inline void
1818coro_enq (pTHX_ struct coro *coro)
1819{
1820 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1821
1822 SvREFCNT_inc_NN (coro->hv);
1823
1824 coro->next_ready = 0;
1825 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1826 ready [1] = coro;
1827}
1828
1829ecb_inline struct coro *
1830coro_deq (pTHX)
1831{
1832 int prio;
1833
1834 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1835 {
1836 struct coro **ready = coro_ready [prio];
1837
1838 if (ready [0])
1839 {
1840 struct coro *coro = ready [0];
1841 ready [0] = coro->next_ready;
1842 return coro;
1843 }
1844 }
1845
1846 return 0;
1847}
1848
1849static void
1850invoke_sv_ready_hook_helper (void)
1851{
1852 dTHX;
629 dSP; 1853 dSP;
630 Coro__State ctx = (Coro__State)arg;
631 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
632 1854
633 coro_init_stacks (aTHX); 1855 ENTER;
634 /*PL_curcop = 0;*/ 1856 SAVETMPS;
635 /*PL_in_eval = PL_in_eval;*/ /* inherit */
636 SvREFCNT_dec (GvAV (PL_defgv));
637 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
638 1857
639 SPAGAIN;
640
641 if (ctx->stack)
642 {
643 ctx->cursp = 0;
644
645 PUSHMARK(SP); 1858 PUSHMARK (SP);
646 PUTBACK; 1859 PUTBACK;
647 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1860 call_sv (coro_readyhook, G_VOID | G_DISCARD);
648 1861
649 if (SvTRUE (ERRSV)) 1862 FREETMPS;
650 croak (NULL); 1863 LEAVE;
651 else 1864}
652 croak ("FATAL: CCTXT coroutine returned!"); 1865
1866static int
1867api_ready (pTHX_ SV *coro_sv)
1868{
1869 struct coro *coro = SvSTATE (coro_sv);
1870
1871 if (coro->flags & CF_READY)
1872 return 0;
1873
1874 coro->flags |= CF_READY;
1875
1876 coro_enq (aTHX_ coro);
1877
1878 if (!coro_nready++)
1879 if (coroapi.readyhook)
1880 coroapi.readyhook ();
1881
1882 return 1;
1883}
1884
1885static int
1886api_is_ready (pTHX_ SV *coro_sv)
1887{
1888 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1889}
1890
1891/* expects to own a reference to next->hv */
1892ecb_inline void
1893prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1894{
1895 SV *prev_sv = SvRV (coro_current);
1896
1897 ta->prev = SvSTATE_hv (prev_sv);
1898 ta->next = next;
1899
1900 TRANSFER_CHECK (*ta);
1901
1902 SvRV_set (coro_current, (SV *)next->hv);
1903
1904 free_coro_mortal (aTHX);
1905 coro_mortal = prev_sv;
1906}
1907
1908static void
1909prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1910{
1911 for (;;)
653 } 1912 {
654 else 1913 struct coro *next = coro_deq (aTHX);
655 {
656 UNOP myop;
657 1914
658 PL_op = (OP *)&myop; 1915 if (ecb_expect_true (next))
659
660 Zero(&myop, 1, UNOP);
661 myop.op_next = Nullop;
662 myop.op_flags = OPf_WANT_VOID;
663
664 PUSHMARK(SP);
665 XPUSHs (sub_init);
666 /*
667 * the next line is slightly wrong, as PL_op->op_next
668 * is actually being executed so we skip the first op.
669 * that doesn't matter, though, since it is only
670 * pp_nextstate and we never return...
671 * ah yes, and I don't care anyways ;)
672 */
673 PUTBACK;
674 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
675 SPAGAIN;
676
677 ENTER; /* necessary e.g. for dounwind */
678 }
679}
680
681static void
682continue_coro (void *arg)
683{
684 /*
685 * this is a _very_ stripped down perl interpreter ;)
686 */
687 Coro__State ctx = (Coro__State)arg;
688 JMPENV coro_start_env;
689
690 PL_top_env = &ctx->start_env;
691
692 ctx->cursp = 0;
693 PL_op = PL_op->op_next;
694 CALLRUNOPS(aTHX);
695
696 abort ();
697}
698
699STATIC void
700transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
701{
702 dSTACKLEVEL;
703 static struct coro *xnext;
704
705 if (prev != next)
706 {
707 xnext = next;
708
709 if (next->mainstack)
710 { 1916 {
711 SAVE (prev, flags); 1917 /* cannot transfer to destroyed coros, skip and look for next */
712 LOAD (next); 1918 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
713 1919 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
714 /* mark this state as in-use */ 1920 else
715 next->mainstack = 0;
716 next->tmps_ix = -2;
717
718 /* stacklevel changed? if yes, grab the stack for us! */
719 if (flags & TRANSFER_SAVE_CCTXT)
720 { 1921 {
721 if (!prev->stack) 1922 next->flags &= ~CF_READY;
722 allocate_stack (prev, 0); 1923 --coro_nready;
723 else if (prev->cursp != stacklevel 1924
724 && prev->stack->usecnt > 1) 1925 prepare_schedule_to (aTHX_ ta, next);
725 { 1926 break;
726 prev->gencnt = ++prev->stack->gencnt;
727 prev->stack->usecnt = 1;
728 }
729
730 /* has our stack been invalidated? */
731 if (next->stack && next->stack->gencnt != next->gencnt)
732 {
733 deallocate_stack (next);
734 allocate_stack (next, 1);
735 coro_create (&(next->stack->cctx),
736 continue_coro, (void *)next,
737 next->stack->sptr, labs (next->stack->ssize));
738 }
739
740 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741 /* don't add any code here */
742 } 1927 }
743
744 } 1928 }
745 else if (next->tmps_ix == -2)
746 croak ("tried to transfer to running coroutine");
747 else 1929 else
748 { 1930 {
749 SAVE (prev, -1); /* first get rid of the old state */ 1931 /* nothing to schedule: call the idle handler */
750 1932 if (SvROK (sv_idle)
751 if (flags & TRANSFER_SAVE_CCTXT) 1933 && SvOBJECT (SvRV (sv_idle)))
752 { 1934 {
753 if (!prev->stack) 1935 if (SvRV (sv_idle) == SvRV (coro_current))
754 allocate_stack (prev, 0);
755
756 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
757 { 1936 {
758 PL_top_env = &next->start_env; 1937 require_pv ("Carp");
759 1938
760 setup_coro (next); 1939 {
1940 dSP;
761 1941
762 prev->stack->refcnt++; 1942 ENTER;
763 prev->stack->usecnt++; 1943 SAVETMPS;
764 next->stack = prev->stack; 1944
765 next->gencnt = prev->gencnt; 1945 PUSHMARK (SP);
1946 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1947 PUTBACK;
1948 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1949
1950 FREETMPS;
1951 LEAVE;
1952 }
766 } 1953 }
767 else 1954
768 { 1955 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
769 assert (!next->stack); 1956 api_ready (aTHX_ SvRV (sv_idle));
770 allocate_stack (next, 1); 1957 --coro_nready;
771 coro_create (&(next->stack->cctx),
772 setup_coro, (void *)next,
773 next->stack->sptr, labs (next->stack->ssize));
774 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775 /* don't add any code here */
776 }
777 } 1958 }
778 else 1959 else
779 setup_coro (next); 1960 {
1961 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1962 dSP;
1963
1964 ENTER;
1965 SAVETMPS;
1966
1967 PUSHMARK (SP);
1968 PUTBACK;
1969 call_sv (sv_idle, G_VOID | G_DISCARD);
1970
1971 FREETMPS;
1972 LEAVE;
1973 }
780 } 1974 }
1975 }
1976}
781 1977
782 /* 1978ecb_inline void
783 * xnext is now either prev or next, depending on wether 1979prepare_cede (pTHX_ struct coro_transfer_args *ta)
784 * we switched the c stack or not. that's why I use a global 1980{
785 * variable, that should become thread-specific at one point. 1981 api_ready (aTHX_ coro_current);
1982 prepare_schedule (aTHX_ ta);
1983}
1984
1985ecb_inline void
1986prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1987{
1988 SV *prev = SvRV (coro_current);
1989
1990 if (coro_nready)
1991 {
1992 prepare_schedule (aTHX_ ta);
1993 api_ready (aTHX_ prev);
1994 }
1995 else
1996 prepare_nop (aTHX_ ta);
1997}
1998
1999static void
2000api_schedule (pTHX)
2001{
2002 struct coro_transfer_args ta;
2003
2004 prepare_schedule (aTHX_ &ta);
2005 TRANSFER (ta, 1);
2006}
2007
2008static void
2009api_schedule_to (pTHX_ SV *coro_sv)
2010{
2011 struct coro_transfer_args ta;
2012 struct coro *next = SvSTATE (coro_sv);
2013
2014 SvREFCNT_inc_NN (coro_sv);
2015 prepare_schedule_to (aTHX_ &ta, next);
2016}
2017
2018static int
2019api_cede (pTHX)
2020{
2021 struct coro_transfer_args ta;
2022
2023 prepare_cede (aTHX_ &ta);
2024
2025 if (ecb_expect_true (ta.prev != ta.next))
2026 {
2027 TRANSFER (ta, 1);
2028 return 1;
2029 }
2030 else
2031 return 0;
2032}
2033
2034static int
2035api_cede_notself (pTHX)
2036{
2037 if (coro_nready)
2038 {
2039 struct coro_transfer_args ta;
2040
2041 prepare_cede_notself (aTHX_ &ta);
2042 TRANSFER (ta, 1);
2043 return 1;
2044 }
2045 else
2046 return 0;
2047}
2048
2049static void
2050api_trace (pTHX_ SV *coro_sv, int flags)
2051{
2052 struct coro *coro = SvSTATE (coro_sv);
2053
2054 if (coro->flags & CF_RUNNING)
2055 croak ("cannot enable tracing on a running coroutine, caught");
2056
2057 if (flags & CC_TRACE)
2058 {
2059 if (!coro->cctx)
2060 coro->cctx = cctx_new_run ();
2061 else if (!(coro->cctx->flags & CC_TRACE))
2062 croak ("cannot enable tracing on coroutine with custom stack, caught");
2063
2064 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2065 }
2066 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2067 {
2068 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2069
2070 if (coro->flags & CF_RUNNING)
2071 PL_runops = RUNOPS_DEFAULT;
2072 else
2073 coro->slot->runops = RUNOPS_DEFAULT;
2074 }
2075}
2076
2077static void
2078coro_push_av (pTHX_ AV *av, I32 gimme_v)
2079{
2080 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2081 {
2082 dSP;
2083
2084 if (gimme_v == G_SCALAR)
2085 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2086 else
2087 {
2088 int i;
2089 EXTEND (SP, AvFILLp (av) + 1);
2090
2091 for (i = 0; i <= AvFILLp (av); ++i)
2092 PUSHs (AvARRAY (av)[i]);
2093 }
2094
2095 PUTBACK;
2096 }
2097}
2098
2099static void
2100coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2101{
2102 if (!coro->on_destroy)
2103 coro->on_destroy = newAV ();
2104
2105 av_push (coro->on_destroy, cb);
2106}
2107
2108static void
2109slf_destroy_join (pTHX_ struct CoroSLF *frame)
2110{
2111 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2112}
2113
2114static int
2115slf_check_join (pTHX_ struct CoroSLF *frame)
2116{
2117 struct coro *coro = (struct coro *)frame->data;
2118
2119 if (!coro->status)
2120 return 1;
2121
2122 frame->destroy = 0;
2123
2124 coro_push_av (aTHX_ coro->status, GIMME_V);
2125
2126 SvREFCNT_dec ((SV *)coro->hv);
2127
2128 return 0;
2129}
2130
2131static void
2132slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2135
2136 if (items > 1)
2137 croak ("join called with too many arguments");
2138
2139 if (coro->status)
2140 frame->prepare = prepare_nop;
2141 else
2142 {
2143 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2144 frame->prepare = prepare_schedule;
2145 }
2146
2147 frame->check = slf_check_join;
2148 frame->destroy = slf_destroy_join;
2149 frame->data = (void *)coro;
2150 SvREFCNT_inc (coro->hv);
2151}
2152
2153static void
2154coro_call_on_destroy (pTHX_ struct coro *coro)
2155{
2156 AV *od = coro->on_destroy;
2157
2158 if (!od)
2159 return;
2160
2161 coro->on_destroy = 0;
2162 sv_2mortal ((SV *)od);
2163
2164 while (AvFILLp (od) >= 0)
2165 {
2166 SV *cb = sv_2mortal (av_pop (od));
2167
2168 /* coro hv's (and only hv's at the moment) are supported as well */
2169 if (SvSTATEhv_p (aTHX_ cb))
2170 api_ready (aTHX_ cb);
2171 else
2172 {
2173 dSP; /* don't disturb outer sp */
2174 PUSHMARK (SP);
2175
2176 if (coro->status)
2177 {
2178 PUTBACK;
2179 coro_push_av (aTHX_ coro->status, G_ARRAY);
2180 SPAGAIN;
2181 }
2182
2183 PUTBACK;
2184 call_sv (cb, G_VOID | G_DISCARD);
2185 }
2186 }
2187}
2188
2189static void
2190coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2191{
2192 AV *av;
2193
2194 if (coro->status)
2195 {
2196 av = coro->status;
2197 av_clear (av);
2198 }
2199 else
2200 av = coro->status = newAV ();
2201
2202 /* items are actually not so common, so optimise for this case */
2203 if (items)
2204 {
2205 int i;
2206
2207 av_extend (av, items - 1);
2208
2209 for (i = 0; i < items; ++i)
2210 av_push (av, SvREFCNT_inc_NN (arg [i]));
2211 }
2212}
2213
2214static void
2215slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2216{
2217 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2218 api_ready (aTHX_ sv_manager);
2219
2220 frame->prepare = prepare_schedule;
2221 frame->check = slf_check_repeat;
2222
2223 /* as a minor optimisation, we could unwind all stacks here */
2224 /* but that puts extra pressure on pp_slf, and is not worth much */
2225 /*coro_unwind_stacks (aTHX);*/
2226}
2227
2228static void
2229slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2230{
2231 HV *coro_hv = (HV *)SvRV (coro_current);
2232
2233 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2234 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2235}
2236
2237static void
2238slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 HV *coro_hv;
2241 struct coro *coro;
2242
2243 if (items <= 0)
2244 croak ("Coro::cancel called without coro object,");
2245
2246 coro = SvSTATE (arg [0]);
2247 coro_hv = coro->hv;
2248
2249 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2250
2251 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2252 {
2253 /* coro currently busy cancelling something, so just notify it */
2254 coro->slf_frame.data = (void *)coro;
2255
2256 frame->prepare = prepare_nop;
2257 frame->check = slf_check_nop;
2258 }
2259 else if (coro_hv == (HV *)SvRV (coro_current))
2260 {
2261 /* cancelling the current coro is allowed, and equals terminate */
2262 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2263 }
2264 else
2265 {
2266 struct coro *self = SvSTATE_current;
2267
2268 if (!self)
2269 croak ("Coro::cancel called outside of thread content,");
2270
2271 /* otherwise we cancel directly, purely for speed reasons
2272 * unfortunately, this requires some magic trickery, as
2273 * somebody else could cancel us, so we have to fight the cancellation.
2274 * this is ugly, and hopefully fully worth the extra speed.
2275 * besides, I can't get the slow-but-safe version working...
786 */ 2276 */
787 xnext->cursp = stacklevel; 2277 slf_frame.data = 0;
788 } 2278 self->flags |= CF_NOCANCEL;
2279 coro_state_destroy (aTHX_ coro);
2280 self->flags &= ~CF_NOCANCEL;
789 2281
790 if (coro_mortal) 2282 if (slf_frame.data)
2283 {
2284 /* while we were busy we have been cancelled, so terminate */
2285 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2286 }
2287 else
2288 {
2289 frame->prepare = prepare_nop;
2290 frame->check = slf_check_nop;
2291 }
791 { 2292 }
792 SvREFCNT_dec (coro_mortal); 2293}
793 coro_mortal = 0; 2294
2295static int
2296slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2297{
2298 frame->prepare = 0;
2299 coro_unwind_stacks (aTHX);
2300
2301 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2302
2303 return 1;
2304}
2305
2306static int
2307safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2308{
2309 if (coro->cctx)
2310 croak ("coro inside C callback, unable to cancel at this time, caught");
2311
2312 if (coro->flags & CF_NEW)
794 } 2313 {
795} 2314 coro_set_status (aTHX_ coro, arg, items);
2315 coro_state_destroy (aTHX_ coro);
2316 }
2317 else
2318 {
2319 if (!coro->slf_frame.prepare)
2320 croak ("coro outside an SLF function, unable to cancel at this time, caught");
796 2321
797#define SV_CORO(sv,func) \ 2322 slf_destroy (aTHX_ coro);
798 do { \
799 if (SvROK (sv)) \
800 sv = SvRV (sv); \
801 \
802 if (SvTYPE(sv) == SVt_PVHV) \
803 { \
804 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
805 \
806 if (!he) \
807 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808 \
809 (sv) = SvRV (HeVAL(he)); \
810 } \
811 \
812 /* must also be changed inside Coro::Cont::yield */ \
813 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
814 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815 \
816 } while(0)
817 2323
818#define SvSTATE(sv) (struct coro *)SvIV (sv) 2324 coro_set_status (aTHX_ coro, arg, items);
2325 coro->slf_frame.prepare = prepare_nop;
2326 coro->slf_frame.check = slf_check_safe_cancel;
819 2327
820static void 2328 api_ready (aTHX_ (SV *)coro->hv);
821api_transfer(pTHX_ SV *prev, SV *next, int flags) 2329 }
822{
823 SV_CORO (prev, "Coro::transfer");
824 SV_CORO (next, "Coro::transfer");
825 2330
826 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 2331 return 1;
827} 2332}
828 2333
829/** Coro ********************************************************************/ 2334/*****************************************************************************/
2335/* async pool handler */
830 2336
831#define PRIO_MAX 3
832#define PRIO_HIGH 1
833#define PRIO_NORMAL 0
834#define PRIO_LOW -1
835#define PRIO_IDLE -3
836#define PRIO_MIN -4
837
838/* for Coro.pm */
839static GV *coro_current, *coro_idle;
840static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
841static int coro_nready;
842
843static void 2337static int
844coro_enq (SV *sv) 2338slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
845{ 2339{
846 if (SvTYPE (sv) == SVt_PVHV) 2340 HV *hv = (HV *)SvRV (coro_current);
2341 struct coro *coro = (struct coro *)frame->data;
2342
2343 if (!coro->invoke_cb)
2344 return 1; /* loop till we have invoke */
2345 else
2346 {
2347 hv_store (hv, "desc", sizeof ("desc") - 1,
2348 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2349
2350 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2351
847 { 2352 {
848 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2353 dSP;
849 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2354 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2355 PUTBACK;
2356 }
850 2357
851 prio = prio > PRIO_MAX ? PRIO_MAX 2358 SvREFCNT_dec (GvAV (PL_defgv));
852 : prio < PRIO_MIN ? PRIO_MIN 2359 GvAV (PL_defgv) = coro->invoke_av;
853 : prio; 2360 coro->invoke_av = 0;
854 2361
855 av_push (coro_ready [prio - PRIO_MIN], sv);
856 coro_nready++;
857
858 return; 2362 return 0;
2363 }
2364}
2365
2366static void
2367slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2368{
2369 HV *hv = (HV *)SvRV (coro_current);
2370 struct coro *coro = SvSTATE_hv ((SV *)hv);
2371
2372 if (ecb_expect_true (coro->saved_deffh))
859 } 2373 {
2374 /* subsequent iteration */
2375 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2376 coro->saved_deffh = 0;
860 2377
861 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2378 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2379 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2380 {
2381 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2382 return;
2383 }
2384 else
2385 {
2386 av_clear (GvAV (PL_defgv));
2387 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2388
2389 coro->prio = 0;
2390
2391 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2392 api_trace (aTHX_ coro_current, 0);
2393
2394 frame->prepare = prepare_schedule;
2395 av_push (av_async_pool, SvREFCNT_inc (hv));
2396 }
2397 }
2398 else
2399 {
2400 /* first iteration, simply fall through */
2401 frame->prepare = prepare_nop;
2402 }
2403
2404 frame->check = slf_check_pool_handler;
2405 frame->data = (void *)coro;
2406}
2407
2408/*****************************************************************************/
2409/* rouse callback */
2410
2411#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2412
2413static void
2414coro_rouse_callback (pTHX_ CV *cv)
2415{
2416 dXSARGS;
2417 SV *data = (SV *)S_GENSUB_ARG;
2418
2419 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2420 {
2421 /* first call, set args */
2422 SV *coro = SvRV (data);
2423 AV *av = newAV ();
2424
2425 SvRV_set (data, (SV *)av);
2426
2427 /* better take a full copy of the arguments */
2428 while (items--)
2429 av_store (av, items, newSVsv (ST (items)));
2430
2431 api_ready (aTHX_ coro);
2432 SvREFCNT_dec (coro);
2433 }
2434
2435 XSRETURN_EMPTY;
2436}
2437
2438static int
2439slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2440{
2441 SV *data = (SV *)frame->data;
2442
2443 if (CORO_THROW)
2444 return 0;
2445
2446 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2447 return 1;
2448
2449 /* now push all results on the stack */
2450 {
2451 dSP;
2452 AV *av = (AV *)SvRV (data);
2453 int i;
2454
2455 EXTEND (SP, AvFILLp (av) + 1);
2456 for (i = 0; i <= AvFILLp (av); ++i)
2457 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2458
2459 /* we have stolen the elements, so set length to zero and free */
2460 AvFILLp (av) = -1;
2461 av_undef (av);
2462
2463 PUTBACK;
2464 }
2465
2466 return 0;
2467}
2468
2469static void
2470slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2471{
2472 SV *cb;
2473
2474 if (items)
2475 cb = arg [0];
2476 else
2477 {
2478 struct coro *coro = SvSTATE_current;
2479
2480 if (!coro->rouse_cb)
2481 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2482
2483 cb = sv_2mortal (coro->rouse_cb);
2484 coro->rouse_cb = 0;
2485 }
2486
2487 if (!SvROK (cb)
2488 || SvTYPE (SvRV (cb)) != SVt_PVCV
2489 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2490 croak ("Coro::rouse_wait called with illegal callback argument,");
2491
2492 {
2493 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2494 SV *data = (SV *)S_GENSUB_ARG;
2495
2496 frame->data = (void *)data;
2497 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2498 frame->check = slf_check_rouse_wait;
2499 }
862} 2500}
863 2501
864static SV * 2502static SV *
865coro_deq (int min_prio) 2503coro_new_rouse_cb (pTHX)
866{ 2504{
867 int prio = PRIO_MAX - PRIO_MIN; 2505 HV *hv = (HV *)SvRV (coro_current);
2506 struct coro *coro = SvSTATE_hv (hv);
2507 SV *data = newRV_inc ((SV *)hv);
2508 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
868 2509
869 min_prio -= PRIO_MIN; 2510 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
870 if (min_prio < 0) 2511 SvREFCNT_dec (data); /* magicext increases the refcount */
871 min_prio = 0;
872 2512
873 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2513 SvREFCNT_dec (coro->rouse_cb);
874 if (av_len (coro_ready[prio]) >= 0) 2514 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2515
2516 return cb;
2517}
2518
2519/*****************************************************************************/
2520/* schedule-like-function opcode (SLF) */
2521
2522static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2523static const CV *slf_cv;
2524static SV **slf_argv;
2525static int slf_argc, slf_arga; /* count, allocated */
2526static I32 slf_ax; /* top of stack, for restore */
2527
2528/* this restores the stack in the case we patched the entersub, to */
2529/* recreate the stack frame as perl will on following calls */
2530/* since entersub cleared the stack */
2531static OP *
2532pp_restore (pTHX)
2533{
2534 int i;
2535 SV **SP = PL_stack_base + slf_ax;
2536
2537 PUSHMARK (SP);
2538
2539 EXTEND (SP, slf_argc + 1);
2540
2541 for (i = 0; i < slf_argc; ++i)
2542 PUSHs (sv_2mortal (slf_argv [i]));
2543
2544 PUSHs ((SV *)CvGV (slf_cv));
2545
2546 RETURNOP (slf_restore.op_first);
2547}
2548
2549static void
2550slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2551{
2552 SV **arg = (SV **)slf_frame.data;
2553
2554 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2555}
2556
2557static void
2558slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 if (items != 2)
2561 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2562
2563 frame->prepare = slf_prepare_transfer;
2564 frame->check = slf_check_nop;
2565 frame->data = (void *)arg; /* let's hope it will stay valid */
2566}
2567
2568static void
2569slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2570{
2571 frame->prepare = prepare_schedule;
2572 frame->check = slf_check_nop;
2573}
2574
2575static void
2576slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2577{
2578 struct coro *next = (struct coro *)slf_frame.data;
2579
2580 SvREFCNT_inc_NN (next->hv);
2581 prepare_schedule_to (aTHX_ ta, next);
2582}
2583
2584static void
2585slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2586{
2587 if (!items)
2588 croak ("Coro::schedule_to expects a coroutine argument, caught");
2589
2590 frame->data = (void *)SvSTATE (arg [0]);
2591 frame->prepare = slf_prepare_schedule_to;
2592 frame->check = slf_check_nop;
2593}
2594
2595static void
2596slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2597{
2598 api_ready (aTHX_ SvRV (coro_current));
2599
2600 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2601}
2602
2603static void
2604slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2605{
2606 frame->prepare = prepare_cede;
2607 frame->check = slf_check_nop;
2608}
2609
2610static void
2611slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2612{
2613 frame->prepare = prepare_cede_notself;
2614 frame->check = slf_check_nop;
2615}
2616
2617/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2618static void
2619slf_destroy (pTHX_ struct coro *coro)
2620{
2621 struct CoroSLF frame = coro->slf_frame;
2622
2623 /*
2624 * The on_destroy below most likely is from an SLF call.
2625 * Since by definition the SLF call will not finish when we destroy
2626 * the coro, we will have to force-finish it here, otherwise
2627 * cleanup functions cannot call SLF functions.
2628 */
2629 coro->slf_frame.prepare = 0;
2630
2631 /* this callback is reserved for slf functions needing to do cleanup */
2632 if (frame.destroy && frame.prepare && !PL_dirty)
2633 frame.destroy (aTHX_ &frame);
2634}
2635
2636/*
2637 * these not obviously related functions are all rolled into one
2638 * function to increase chances that they all will call transfer with the same
2639 * stack offset
2640 * SLF stands for "schedule-like-function".
2641 */
2642static OP *
2643pp_slf (pTHX)
2644{
2645 I32 checkmark; /* mark SP to see how many elements check has pushed */
2646
2647 /* set up the slf frame, unless it has already been set-up */
2648 /* the latter happens when a new coro has been started */
2649 /* or when a new cctx was attached to an existing coroutine */
2650 if (ecb_expect_true (!slf_frame.prepare))
2651 {
2652 /* first iteration */
2653 dSP;
2654 SV **arg = PL_stack_base + TOPMARK + 1;
2655 int items = SP - arg; /* args without function object */
2656 SV *gv = *sp;
2657
2658 /* do a quick consistency check on the "function" object, and if it isn't */
2659 /* for us, divert to the real entersub */
2660 if (SvTYPE (gv) != SVt_PVGV
2661 || !GvCV (gv)
2662 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2663 return PL_ppaddr[OP_ENTERSUB](aTHX);
2664
2665 if (!(PL_op->op_flags & OPf_STACKED))
875 { 2666 {
876 coro_nready--; 2667 /* ampersand-form of call, use @_ instead of stack */
877 return av_shift (coro_ready[prio]); 2668 AV *av = GvAV (PL_defgv);
2669 arg = AvARRAY (av);
2670 items = AvFILLp (av) + 1;
878 } 2671 }
2672
2673 /* now call the init function, which needs to set up slf_frame */
2674 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2675 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2676
2677 /* pop args */
2678 SP = PL_stack_base + POPMARK;
2679
2680 PUTBACK;
2681 }
2682
2683 /* now that we have a slf_frame, interpret it! */
2684 /* we use a callback system not to make the code needlessly */
2685 /* complicated, but so we can run multiple perl coros from one cctx */
2686
2687 do
2688 {
2689 struct coro_transfer_args ta;
2690
2691 slf_frame.prepare (aTHX_ &ta);
2692 TRANSFER (ta, 0);
2693
2694 checkmark = PL_stack_sp - PL_stack_base;
2695 }
2696 while (slf_frame.check (aTHX_ &slf_frame));
2697
2698 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2699
2700 /* exception handling */
2701 if (ecb_expect_false (CORO_THROW))
2702 {
2703 SV *exception = sv_2mortal (CORO_THROW);
2704
2705 CORO_THROW = 0;
2706 sv_setsv (ERRSV, exception);
2707 croak (0);
2708 }
2709
2710 /* return value handling - mostly like entersub */
2711 /* make sure we put something on the stack in scalar context */
2712 if (GIMME_V == G_SCALAR
2713 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2714 {
2715 dSP;
2716 SV **bot = PL_stack_base + checkmark;
2717
2718 if (sp == bot) /* too few, push undef */
2719 bot [1] = &PL_sv_undef;
2720 else /* too many, take last one */
2721 bot [1] = *sp;
2722
2723 SP = bot + 1;
2724
2725 PUTBACK;
2726 }
2727
2728 return NORMAL;
2729}
2730
2731static void
2732api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2733{
2734 int i;
2735 SV **arg = PL_stack_base + ax;
2736 int items = PL_stack_sp - arg + 1;
2737
2738 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2739
2740 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2741 && PL_op->op_ppaddr != pp_slf)
2742 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2743
2744 CvFLAGS (cv) |= CVf_SLF;
2745 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2746 slf_cv = cv;
2747
2748 /* we patch the op, and then re-run the whole call */
2749 /* we have to put the same argument on the stack for this to work */
2750 /* and this will be done by pp_restore */
2751 slf_restore.op_next = (OP *)&slf_restore;
2752 slf_restore.op_type = OP_CUSTOM;
2753 slf_restore.op_ppaddr = pp_restore;
2754 slf_restore.op_first = PL_op;
2755
2756 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2757
2758 if (PL_op->op_flags & OPf_STACKED)
2759 {
2760 if (items > slf_arga)
2761 {
2762 slf_arga = items;
2763 Safefree (slf_argv);
2764 New (0, slf_argv, slf_arga, SV *);
2765 }
2766
2767 slf_argc = items;
2768
2769 for (i = 0; i < items; ++i)
2770 slf_argv [i] = SvREFCNT_inc (arg [i]);
2771 }
2772 else
2773 slf_argc = 0;
2774
2775 PL_op->op_ppaddr = pp_slf;
2776 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2777
2778 PL_op = (OP *)&slf_restore;
2779}
2780
2781/*****************************************************************************/
2782/* dynamic wind */
2783
2784static void
2785on_enterleave_call (pTHX_ SV *cb)
2786{
2787 dSP;
2788
2789 PUSHSTACK;
2790
2791 PUSHMARK (SP);
2792 PUTBACK;
2793 call_sv (cb, G_VOID | G_DISCARD);
2794 SPAGAIN;
2795
2796 POPSTACK;
2797}
2798
2799static SV *
2800coro_avp_pop_and_free (pTHX_ AV **avp)
2801{
2802 AV *av = *avp;
2803 SV *res = av_pop (av);
2804
2805 if (AvFILLp (av) < 0)
2806 {
2807 *avp = 0;
2808 SvREFCNT_dec (av);
2809 }
2810
2811 return res;
2812}
2813
2814static void
2815coro_pop_on_enter (pTHX_ void *coro)
2816{
2817 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2818 SvREFCNT_dec (cb);
2819}
2820
2821static void
2822coro_pop_on_leave (pTHX_ void *coro)
2823{
2824 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2825 on_enterleave_call (aTHX_ sv_2mortal (cb));
2826}
2827
2828/*****************************************************************************/
2829/* PerlIO::cede */
2830
2831typedef struct
2832{
2833 PerlIOBuf base;
2834 NV next, every;
2835} PerlIOCede;
2836
2837static IV ecb_cold
2838PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841
2842 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2843 self->next = nvtime () + self->every;
2844
2845 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2846}
2847
2848static SV * ecb_cold
2849PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2850{
2851 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2852
2853 return newSVnv (self->every);
2854}
2855
2856static IV
2857PerlIOCede_flush (pTHX_ PerlIO *f)
2858{
2859 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2860 double now = nvtime ();
2861
2862 if (now >= self->next)
2863 {
2864 api_cede (aTHX);
2865 self->next = now + self->every;
2866 }
2867
2868 return PerlIOBuf_flush (aTHX_ f);
2869}
2870
2871static PerlIO_funcs PerlIO_cede =
2872{
2873 sizeof(PerlIO_funcs),
2874 "cede",
2875 sizeof(PerlIOCede),
2876 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2877 PerlIOCede_pushed,
2878 PerlIOBuf_popped,
2879 PerlIOBuf_open,
2880 PerlIOBase_binmode,
2881 PerlIOCede_getarg,
2882 PerlIOBase_fileno,
2883 PerlIOBuf_dup,
2884 PerlIOBuf_read,
2885 PerlIOBuf_unread,
2886 PerlIOBuf_write,
2887 PerlIOBuf_seek,
2888 PerlIOBuf_tell,
2889 PerlIOBuf_close,
2890 PerlIOCede_flush,
2891 PerlIOBuf_fill,
2892 PerlIOBase_eof,
2893 PerlIOBase_error,
2894 PerlIOBase_clearerr,
2895 PerlIOBase_setlinebuf,
2896 PerlIOBuf_get_base,
2897 PerlIOBuf_bufsiz,
2898 PerlIOBuf_get_ptr,
2899 PerlIOBuf_get_cnt,
2900 PerlIOBuf_set_ptrcnt,
2901};
2902
2903/*****************************************************************************/
2904/* Coro::Semaphore & Coro::Signal */
2905
2906static SV *
2907coro_waitarray_new (pTHX_ int count)
2908{
2909 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2910 AV *av = newAV ();
2911 SV **ary;
2912
2913 /* unfortunately, building manually saves memory */
2914 Newx (ary, 2, SV *);
2915 AvALLOC (av) = ary;
2916#if PERL_VERSION_ATLEAST (5,10,0)
2917 AvARRAY (av) = ary;
2918#else
2919 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2920 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2921 SvPVX ((SV *)av) = (char *)ary;
2922#endif
2923 AvMAX (av) = 1;
2924 AvFILLp (av) = 0;
2925 ary [0] = newSViv (count);
2926
2927 return newRV_noinc ((SV *)av);
2928}
2929
2930/* semaphore */
2931
2932static void
2933coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2934{
2935 SV *count_sv = AvARRAY (av)[0];
2936 IV count = SvIVX (count_sv);
2937
2938 count += adjust;
2939 SvIVX (count_sv) = count;
2940
2941 /* now wake up as many waiters as are expected to lock */
2942 while (count > 0 && AvFILLp (av) > 0)
2943 {
2944 SV *cb;
2945
2946 /* swap first two elements so we can shift a waiter */
2947 AvARRAY (av)[0] = AvARRAY (av)[1];
2948 AvARRAY (av)[1] = count_sv;
2949 cb = av_shift (av);
2950
2951 if (SvOBJECT (cb))
2952 {
2953 api_ready (aTHX_ cb);
2954 --count;
2955 }
2956 else if (SvTYPE (cb) == SVt_PVCV)
2957 {
2958 dSP;
2959 PUSHMARK (SP);
2960 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2961 PUTBACK;
2962 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2963 }
2964
2965 SvREFCNT_dec (cb);
2966 }
2967}
2968
2969static void
2970coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2971{
2972 /* call $sem->adjust (0) to possibly wake up some other waiters */
2973 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2974}
2975
2976static int
2977slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2978{
2979 AV *av = (AV *)frame->data;
2980 SV *count_sv = AvARRAY (av)[0];
2981 SV *coro_hv = SvRV (coro_current);
2982
2983 frame->destroy = 0;
2984
2985 /* if we are about to throw, don't actually acquire the lock, just throw */
2986 if (ecb_expect_false (CORO_THROW))
2987 {
2988 /* we still might be responsible for the semaphore, so wake up others */
2989 coro_semaphore_adjust (aTHX_ av, 0);
2990
2991 return 0;
2992 }
2993 else if (SvIVX (count_sv) > 0)
2994 {
2995 if (acquire)
2996 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2997 else
2998 coro_semaphore_adjust (aTHX_ av, 0);
2999
3000 return 0;
3001 }
3002 else
3003 {
3004 int i;
3005 /* if we were woken up but can't down, we look through the whole */
3006 /* waiters list and only add us if we aren't in there already */
3007 /* this avoids some degenerate memory usage cases */
3008 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3009 if (AvARRAY (av)[i] == coro_hv)
3010 return 1;
3011
3012 av_push (av, SvREFCNT_inc (coro_hv));
3013 return 1;
3014 }
3015}
3016
3017static int
3018slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3019{
3020 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3021}
3022
3023static int
3024slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3025{
3026 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3027}
3028
3029static void
3030slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3031{
3032 AV *av = (AV *)SvRV (arg [0]);
3033
3034 if (SvIVX (AvARRAY (av)[0]) > 0)
3035 {
3036 frame->data = (void *)av;
3037 frame->prepare = prepare_nop;
3038 }
3039 else
3040 {
3041 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3042
3043 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3044 frame->prepare = prepare_schedule;
3045 /* to avoid race conditions when a woken-up coro gets terminated */
3046 /* we arrange for a temporary on_destroy that calls adjust (0) */
3047 frame->destroy = coro_semaphore_destroy;
3048 }
3049}
3050
3051static void
3052slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3053{
3054 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3055 frame->check = slf_check_semaphore_down;
3056}
3057
3058static void
3059slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3060{
3061 if (items >= 2)
3062 {
3063 /* callback form */
3064 AV *av = (AV *)SvRV (arg [0]);
3065 SV *cb_cv = s_get_cv_croak (arg [1]);
3066
3067 av_push (av, SvREFCNT_inc_NN (cb_cv));
3068
3069 if (SvIVX (AvARRAY (av)[0]) > 0)
3070 coro_semaphore_adjust (aTHX_ av, 0);
3071
3072 frame->prepare = prepare_nop;
3073 frame->check = slf_check_nop;
3074 }
3075 else
3076 {
3077 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3078 frame->check = slf_check_semaphore_wait;
3079 }
3080}
3081
3082/* signal */
3083
3084static void
3085coro_signal_wake (pTHX_ AV *av, int count)
3086{
3087 SvIVX (AvARRAY (av)[0]) = 0;
3088
3089 /* now signal count waiters */
3090 while (count > 0 && AvFILLp (av) > 0)
3091 {
3092 SV *cb;
3093
3094 /* swap first two elements so we can shift a waiter */
3095 cb = AvARRAY (av)[0];
3096 AvARRAY (av)[0] = AvARRAY (av)[1];
3097 AvARRAY (av)[1] = cb;
3098
3099 cb = av_shift (av);
3100
3101 if (SvTYPE (cb) == SVt_PVCV)
3102 {
3103 dSP;
3104 PUSHMARK (SP);
3105 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3106 PUTBACK;
3107 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3108 }
3109 else
3110 {
3111 api_ready (aTHX_ cb);
3112 sv_setiv (cb, 0); /* signal waiter */
3113 }
3114
3115 SvREFCNT_dec (cb);
3116
3117 --count;
3118 }
3119}
3120
3121static int
3122slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3123{
3124 /* if we are about to throw, also stop waiting */
3125 return SvROK ((SV *)frame->data) && !CORO_THROW;
3126}
3127
3128static void
3129slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3130{
3131 AV *av = (AV *)SvRV (arg [0]);
3132
3133 if (items >= 2)
3134 {
3135 SV *cb_cv = s_get_cv_croak (arg [1]);
3136 av_push (av, SvREFCNT_inc_NN (cb_cv));
3137
3138 if (SvIVX (AvARRAY (av)[0]))
3139 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3140
3141 frame->prepare = prepare_nop;
3142 frame->check = slf_check_nop;
3143 }
3144 else if (SvIVX (AvARRAY (av)[0]))
3145 {
3146 SvIVX (AvARRAY (av)[0]) = 0;
3147 frame->prepare = prepare_nop;
3148 frame->check = slf_check_nop;
3149 }
3150 else
3151 {
3152 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3153
3154 av_push (av, waiter);
3155
3156 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3157 frame->prepare = prepare_schedule;
3158 frame->check = slf_check_signal_wait;
3159 }
3160}
3161
3162/*****************************************************************************/
3163/* Coro::AIO */
3164
3165#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3166
3167/* helper storage struct */
3168struct io_state
3169{
3170 int errorno;
3171 I32 laststype; /* U16 in 5.10.0 */
3172 int laststatval;
3173 Stat_t statcache;
3174};
3175
3176static void
3177coro_aio_callback (pTHX_ CV *cv)
3178{
3179 dXSARGS;
3180 AV *state = (AV *)S_GENSUB_ARG;
3181 SV *coro = av_pop (state);
3182 SV *data_sv = newSV (sizeof (struct io_state));
3183
3184 av_extend (state, items - 1);
3185
3186 sv_upgrade (data_sv, SVt_PV);
3187 SvCUR_set (data_sv, sizeof (struct io_state));
3188 SvPOK_only (data_sv);
3189
3190 {
3191 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3192
3193 data->errorno = errno;
3194 data->laststype = PL_laststype;
3195 data->laststatval = PL_laststatval;
3196 data->statcache = PL_statcache;
3197 }
3198
3199 /* now build the result vector out of all the parameters and the data_sv */
3200 {
3201 int i;
3202
3203 for (i = 0; i < items; ++i)
3204 av_push (state, SvREFCNT_inc_NN (ST (i)));
3205 }
3206
3207 av_push (state, data_sv);
3208
3209 api_ready (aTHX_ coro);
3210 SvREFCNT_dec (coro);
3211 SvREFCNT_dec ((AV *)state);
3212}
3213
3214static int
3215slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3216{
3217 AV *state = (AV *)frame->data;
3218
3219 /* if we are about to throw, return early */
3220 /* this does not cancel the aio request, but at least */
3221 /* it quickly returns */
3222 if (CORO_THROW)
3223 return 0;
3224
3225 /* one element that is an RV? repeat! */
3226 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3227 return 1;
3228
3229 /* restore status */
3230 {
3231 SV *data_sv = av_pop (state);
3232 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3233
3234 errno = data->errorno;
3235 PL_laststype = data->laststype;
3236 PL_laststatval = data->laststatval;
3237 PL_statcache = data->statcache;
3238
3239 SvREFCNT_dec (data_sv);
3240 }
3241
3242 /* push result values */
3243 {
3244 dSP;
3245 int i;
3246
3247 EXTEND (SP, AvFILLp (state) + 1);
3248 for (i = 0; i <= AvFILLp (state); ++i)
3249 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3250
3251 PUTBACK;
3252 }
879 3253
880 return 0; 3254 return 0;
881} 3255}
882 3256
883static void 3257static void
884api_ready (SV *coro) 3258slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
885{ 3259{
886 if (SvROK (coro)) 3260 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
887 coro = SvRV (coro);
888
889 coro_enq (SvREFCNT_inc (coro));
890}
891
892static void
893api_schedule (void)
894{
895 SV *prev, *next;
896
897 prev = SvRV (GvSV (coro_current)); 3261 SV *coro_hv = SvRV (coro_current);
898 next = coro_deq (PRIO_MIN); 3262 struct coro *coro = SvSTATE_hv (coro_hv);
899 3263
900 if (!next) 3264 /* put our coroutine id on the state arg */
901 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3265 av_push (state, SvREFCNT_inc_NN (coro_hv));
902 3266
903 /* free this only after the transfer */ 3267 /* first see whether we have a non-zero priority and set it as AIO prio */
904 coro_mortal = prev; 3268 if (coro->prio)
905 SV_CORO (prev, "Coro::schedule"); 3269 {
3270 dSP;
906 3271
907 SvRV (GvSV (coro_current)) = next; 3272 static SV *prio_cv;
3273 static SV *prio_sv;
908 3274
909 SV_CORO (next, "Coro::schedule"); 3275 if (ecb_expect_false (!prio_cv))
3276 {
3277 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3278 prio_sv = newSViv (0);
3279 }
910 3280
911 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3281 PUSHMARK (SP);
912 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3282 sv_setiv (prio_sv, coro->prio);
913} 3283 XPUSHs (prio_sv);
914 3284
915static void 3285 PUTBACK;
916api_cede (void) 3286 call_sv (prio_cv, G_VOID | G_DISCARD);
917{ 3287 }
918 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
919 3288
920 api_schedule (); 3289 /* now call the original request */
921} 3290 {
3291 dSP;
3292 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3293 int i;
922 3294
3295 PUSHMARK (SP);
3296
3297 /* first push all args to the stack */
3298 EXTEND (SP, items + 1);
3299
3300 for (i = 0; i < items; ++i)
3301 PUSHs (arg [i]);
3302
3303 /* now push the callback closure */
3304 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3305
3306 /* now call the AIO function - we assume our request is uncancelable */
3307 PUTBACK;
3308 call_sv ((SV *)req, G_VOID | G_DISCARD);
3309 }
3310
3311 /* now that the request is going, we loop till we have a result */
3312 frame->data = (void *)state;
3313 frame->prepare = prepare_schedule;
3314 frame->check = slf_check_aio_req;
3315}
3316
3317static void
3318coro_aio_req_xs (pTHX_ CV *cv)
3319{
3320 dXSARGS;
3321
3322 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3323
3324 XSRETURN_EMPTY;
3325}
3326
3327/*****************************************************************************/
3328
3329#if CORO_CLONE
3330# include "clone.c"
3331#endif
3332
3333/*****************************************************************************/
3334
3335static SV *
3336coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3337{
3338 SV *coro_sv;
3339 struct coro *coro;
3340 MAGIC *mg;
3341 HV *hv;
3342 SV *cb;
3343 int i;
3344
3345 if (argc > 0)
3346 {
3347 cb = s_get_cv_croak (argv [0]);
3348
3349 if (!is_coro)
3350 {
3351 if (CvISXSUB (cb))
3352 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3353
3354 if (!CvROOT (cb))
3355 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3356 }
3357 }
3358
3359 Newz (0, coro, 1, struct coro);
3360 coro->args = newAV ();
3361 coro->flags = CF_NEW;
3362
3363 if (coro_first) coro_first->prev = coro;
3364 coro->next = coro_first;
3365 coro_first = coro;
3366
3367 coro->hv = hv = newHV ();
3368 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3369 mg->mg_flags |= MGf_DUP;
3370 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3371
3372 if (argc > 0)
3373 {
3374 av_extend (coro->args, argc + is_coro - 1);
3375
3376 if (is_coro)
3377 {
3378 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3379 cb = (SV *)cv_coro_run;
3380 }
3381
3382 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3383
3384 for (i = 1; i < argc; i++)
3385 av_push (coro->args, newSVsv (argv [i]));
3386 }
3387
3388 return coro_sv;
3389}
3390
3391#ifndef __cplusplus
3392ecb_cold XS(boot_Coro__State);
3393#endif
3394
3395#if CORO_JIT
3396
3397static void ecb_noinline ecb_cold
3398pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3399{
3400 dSP;
3401 AV *av = newAV ();
3402
3403 av_store (av, 3, newSVuv (d));
3404 av_store (av, 2, newSVuv (c));
3405 av_store (av, 1, newSVuv (b));
3406 av_store (av, 0, newSVuv (a));
3407
3408 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3409
3410 PUTBACK;
3411}
3412
3413static void ecb_noinline ecb_cold
3414jit_init (pTHX)
3415{
3416 dSP;
3417 SV *load, *save;
3418 char *map_base;
3419 char *load_ptr, *save_ptr;
3420 STRLEN load_len, save_len, map_len;
3421 int count;
3422
3423 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3424
3425 PUSHMARK (SP);
3426 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3427 #include "state.h"
3428 count = call_pv ("Coro::State::_jit", G_ARRAY);
3429 SPAGAIN;
3430
3431 save = POPs; save_ptr = SvPVbyte (save, save_len);
3432 load = POPs; load_ptr = SvPVbyte (load, load_len);
3433
3434 map_len = load_len + save_len + 16;
3435
3436 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3437
3438 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3439
3440 load_perl_slots = (load_save_perl_slots_type)map_base;
3441 memcpy (map_base, load_ptr, load_len);
3442
3443 map_base += (load_len + 15) & ~15;
3444
3445 save_perl_slots = (load_save_perl_slots_type)map_base;
3446 memcpy (map_base, save_ptr, save_len);
3447
3448 /* we are good citizens and try to make the page read-only, so the evil evil */
3449 /* hackers might have it a bit more difficult */
3450 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3451
3452 PUTBACK;
3453 eval_pv ("undef &Coro::State::_jit", 1);
3454}
3455
3456#endif
3457
923MODULE = Coro::State PACKAGE = Coro::State 3458MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
924 3459
925PROTOTYPES: ENABLE 3460PROTOTYPES: DISABLE
926 3461
927BOOT: 3462BOOT:
928{ /* {} necessary for stoopid perl-5.6.x */ 3463{
929 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3464#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
930 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3465#include "state.h"
3466#ifdef USE_ITHREADS
3467# if CORO_PTHREAD
3468 coro_thx = PERL_GET_CONTEXT;
3469# endif
3470#endif
3471 /* perl defines these to check for existance first, but why it doesn't */
3472 /* just create them one at init time is not clear to me, except for */
3473 /* programs trying to delete them, but... */
3474 /* anyway, we declare this as invalid and make sure they are initialised here */
3475 DEFSV;
3476 ERRSV;
3477
3478 cctx_current = cctx_new_empty ();
3479
3480 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3481 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3482
3483 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3484 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3485 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3486
3487 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3488 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3489 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3490
931 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3491 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932 3492
933 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3493 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
934 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3494 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
935 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3495 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
936 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3496 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
937
938 if (!padlist_cache)
939 padlist_cache = newHV ();
940 3497
941 main_mainstack = PL_mainstack; 3498 main_mainstack = PL_mainstack;
3499 main_top_env = PL_top_env;
942 3500
3501 while (main_top_env->je_prev)
3502 main_top_env = main_top_env->je_prev;
3503
3504 {
3505 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3506
3507 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3508 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3509
3510 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3511 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3512 }
3513
943 coroapi.ver = CORO_API_VERSION; 3514 coroapi.ver = CORO_API_VERSION;
3515 coroapi.rev = CORO_API_REVISION;
3516
944 coroapi.transfer = api_transfer; 3517 coroapi.transfer = api_transfer;
945}
946 3518
947Coro::State 3519 coroapi.sv_state = SvSTATE_;
948_newprocess(args) 3520 coroapi.execute_slf = api_execute_slf;
949 SV * args 3521 coroapi.prepare_nop = prepare_nop;
3522 coroapi.prepare_schedule = prepare_schedule;
3523 coroapi.prepare_cede = prepare_cede;
3524 coroapi.prepare_cede_notself = prepare_cede_notself;
3525
3526 time_init (aTHX);
3527
3528 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3529#if CORO_JIT
3530 PUTBACK;
3531 jit_init (aTHX);
3532 SPAGAIN;
3533#endif
3534}
3535
3536SV *
3537new (SV *klass, ...)
3538 ALIAS:
3539 Coro::new = 1
3540 CODE:
3541 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3542 OUTPUT:
3543 RETVAL
3544
3545void
3546transfer (...)
3547 PROTOTYPE: $$
3548 CODE:
3549 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3550
3551SV *
3552clone (Coro::State coro)
3553 CODE:
3554{
3555#if CORO_CLONE
3556 struct coro *ncoro = coro_clone (aTHX_ coro);
3557 MAGIC *mg;
3558 /* TODO: too much duplication */
3559 ncoro->hv = newHV ();
3560 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3561 mg->mg_flags |= MGf_DUP;
3562 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3563#else
3564 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3565#endif
3566}
3567 OUTPUT:
3568 RETVAL
3569
3570int
3571cctx_stacksize (int new_stacksize = 0)
3572 PROTOTYPE: ;$
3573 CODE:
3574 RETVAL = cctx_stacksize;
3575 if (new_stacksize)
3576 {
3577 cctx_stacksize = new_stacksize;
3578 ++cctx_gen;
3579 }
3580 OUTPUT:
3581 RETVAL
3582
3583int
3584cctx_max_idle (int max_idle = 0)
3585 PROTOTYPE: ;$
3586 CODE:
3587 RETVAL = cctx_max_idle;
3588 if (max_idle > 1)
3589 cctx_max_idle = max_idle;
3590 OUTPUT:
3591 RETVAL
3592
3593int
3594cctx_count ()
3595 PROTOTYPE:
3596 CODE:
3597 RETVAL = cctx_count;
3598 OUTPUT:
3599 RETVAL
3600
3601int
3602cctx_idle ()
3603 PROTOTYPE:
3604 CODE:
3605 RETVAL = cctx_idle;
3606 OUTPUT:
3607 RETVAL
3608
3609void
3610list ()
3611 PROTOTYPE:
3612 PPCODE:
3613{
3614 struct coro *coro;
3615 for (coro = coro_first; coro; coro = coro->next)
3616 if (coro->hv)
3617 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3618}
3619
3620void
3621call (Coro::State coro, SV *coderef)
3622 ALIAS:
3623 eval = 1
3624 CODE:
3625{
3626 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3627 {
3628 struct coro *current = SvSTATE_current;
3629 struct CoroSLF slf_save;
3630
3631 if (current != coro)
3632 {
3633 PUTBACK;
3634 save_perl (aTHX_ current);
3635 load_perl (aTHX_ coro);
3636 /* the coro is most likely in an active SLF call.
3637 * while not strictly required (the code we execute is
3638 * not allowed to call any SLF functions), it's cleaner
3639 * to reinitialise the slf_frame and restore it later.
3640 * This might one day allow us to actually do SLF calls
3641 * from code executed here.
3642 */
3643 slf_save = slf_frame;
3644 slf_frame.prepare = 0;
3645 SPAGAIN;
3646 }
3647
3648 PUSHSTACK;
3649
3650 PUSHMARK (SP);
3651 PUTBACK;
3652
3653 if (ix)
3654 eval_sv (coderef, 0);
3655 else
3656 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3657
3658 POPSTACK;
3659 SPAGAIN;
3660
3661 if (current != coro)
3662 {
3663 PUTBACK;
3664 slf_frame = slf_save;
3665 save_perl (aTHX_ coro);
3666 load_perl (aTHX_ current);
3667 SPAGAIN;
3668 }
3669 }
3670}
3671
3672SV *
3673is_ready (Coro::State coro)
950 PROTOTYPE: $ 3674 PROTOTYPE: $
3675 ALIAS:
3676 is_ready = CF_READY
3677 is_running = CF_RUNNING
3678 is_new = CF_NEW
3679 is_destroyed = CF_ZOMBIE
3680 is_zombie = CF_ZOMBIE
3681 is_suspended = CF_SUSPENDED
3682 CODE:
3683 RETVAL = boolSV (coro->flags & ix);
3684 OUTPUT:
3685 RETVAL
3686
3687void
3688throw (SV *self, SV *exception = &PL_sv_undef)
3689 PROTOTYPE: $;$
951 CODE: 3690 CODE:
952 Coro__State coro; 3691{
3692 struct coro *coro = SvSTATE (self);
3693 struct coro *current = SvSTATE_current;
3694 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3695 SvREFCNT_dec (*exceptionp);
3696 SvGETMAGIC (exception);
3697 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
953 3698
954 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3699 api_ready (aTHX_ self);
955 croak ("Coro::State::_newprocess expects an arrayref"); 3700}
3701
3702void
3703api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3704 PROTOTYPE: $;$
3705 C_ARGS: aTHX_ coro, flags
3706
3707SV *
3708has_cctx (Coro::State coro)
3709 PROTOTYPE: $
3710 CODE:
3711 /* maybe manage the running flag differently */
3712 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3713 OUTPUT:
3714 RETVAL
3715
3716int
3717is_traced (Coro::State coro)
3718 PROTOTYPE: $
3719 CODE:
3720 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3721 OUTPUT:
3722 RETVAL
3723
3724UV
3725rss (Coro::State coro)
3726 PROTOTYPE: $
3727 ALIAS:
3728 usecount = 1
3729 CODE:
3730 switch (ix)
3731 {
3732 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3733 case 1: RETVAL = coro->usecount; break;
956 3734 }
957 Newz (0, coro, 1, struct coro); 3735 OUTPUT:
958
959 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
960 coro->mainstack = 0; /* actual work is done inside transfer */
961 coro->stack = 0;
962
963 /* same as JMPENV_BOOTSTRAP */
964 /* we might be able to recycle start_env, but safe is safe */
965 //Zero(&coro->start_env, 1, JMPENV);
966 coro->start_env.je_ret = -1;
967 coro->start_env.je_mustcatch = TRUE;
968
969 RETVAL = coro; 3736 RETVAL
3737
3738void
3739force_cctx ()
3740 PROTOTYPE:
3741 CODE:
3742 cctx_current->idle_sp = 0;
3743
3744void
3745swap_defsv (Coro::State self)
3746 PROTOTYPE: $
3747 ALIAS:
3748 swap_defav = 1
3749 CODE:
3750 if (!self->slot)
3751 croak ("cannot swap state with coroutine that has no saved state,");
3752 else
3753 {
3754 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3755 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3756
3757 SV *tmp = *src; *src = *dst; *dst = tmp;
3758 }
3759
3760void
3761cancel (Coro::State self)
3762 CODE:
3763 coro_state_destroy (aTHX_ self);
3764
3765SV *
3766enable_times (int enabled = enable_times)
3767 CODE:
3768{
3769 RETVAL = boolSV (enable_times);
3770
3771 if (enabled != enable_times)
3772 {
3773 enable_times = enabled;
3774
3775 coro_times_update ();
3776 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3777 }
3778}
970 OUTPUT: 3779 OUTPUT:
971 RETVAL 3780 RETVAL
972 3781
973void 3782void
974transfer(prev, next, flags) 3783times (Coro::State self)
975 SV *prev 3784 PPCODE:
976 SV *next 3785{
977 int flags 3786 struct coro *current = SvSTATE (coro_current);
978 PROTOTYPE: @ 3787
3788 if (ecb_expect_false (current == self))
3789 {
3790 coro_times_update ();
3791 coro_times_add (SvSTATE (coro_current));
3792 }
3793
3794 EXTEND (SP, 2);
3795 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3796 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3797
3798 if (ecb_expect_false (current == self))
3799 coro_times_sub (SvSTATE (coro_current));
3800}
3801
3802void
3803swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3804 CODE:
3805{
3806 struct coro *current = SvSTATE_current;
3807
3808 if (current == coro)
3809 SWAP_SVS (current);
3810
3811 if (!coro->swap_sv)
3812 coro->swap_sv = newAV ();
3813
3814 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3815 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3816
3817 if (current == coro)
3818 SWAP_SVS (current);
3819}
3820
3821
3822MODULE = Coro::State PACKAGE = Coro
3823
3824BOOT:
3825{
3826 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3827 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3828 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3829 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3830 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3831 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3832 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3833 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3834
3835 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3836 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3837 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3838 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3839
3840 coro_stash = gv_stashpv ("Coro", TRUE);
3841
3842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3848
3849 {
3850 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3851
3852 coroapi.schedule = api_schedule;
3853 coroapi.schedule_to = api_schedule_to;
3854 coroapi.cede = api_cede;
3855 coroapi.cede_notself = api_cede_notself;
3856 coroapi.ready = api_ready;
3857 coroapi.is_ready = api_is_ready;
3858 coroapi.nready = coro_nready;
3859 coroapi.current = coro_current;
3860
3861 /*GCoroAPI = &coroapi;*/
3862 sv_setiv (sv, (IV)&coroapi);
3863 SvREADONLY_on (sv);
3864 }
3865}
3866
3867SV *
3868async (...)
3869 PROTOTYPE: &@
979 CODE: 3870 CODE:
980 PUTBACK; 3871 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
981 SV_CORO (next, "Coro::transfer"); 3872 api_ready (aTHX_ RETVAL);
982 SV_CORO (prev, "Coro::transfer"); 3873 OUTPUT:
983 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3874 RETVAL
984 SPAGAIN;
985 3875
986void 3876void
987DESTROY(coro) 3877_destroy (Coro::State coro)
988 Coro::State coro 3878 CODE:
989 CODE: 3879 /* used by the manager thread */
990 3880 coro_state_destroy (aTHX_ coro);
991 if (coro->mainstack && coro->mainstack != main_mainstack)
992 {
993 struct coro temp;
994
995 PUTBACK;
996 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
997 LOAD(aTHX_ coro);
998 SPAGAIN;
999
1000 destroy_stacks (aTHX);
1001
1002 LOAD((&temp)); /* this will get rid of defsv etc.. */
1003 SPAGAIN;
1004
1005 coro->mainstack = 0;
1006 }
1007
1008 deallocate_stack (coro);
1009 SvREFCNT_dec (coro->args);
1010 Safefree (coro);
1011 3881
1012void 3882void
1013flush() 3883on_destroy (Coro::State coro, SV *cb)
1014 CODE: 3884 CODE:
1015#ifdef MAY_FLUSH 3885 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
1016 flush_padlist_cache ();
1017#endif
1018 3886
1019void 3887void
1020_exit(code) 3888join (...)
1021 int code 3889 CODE:
3890 CORO_EXECUTE_SLF_XS (slf_init_join);
3891
3892void
3893terminate (...)
3894 CODE:
3895 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3896
3897void
3898cancel (...)
3899 CODE:
3900 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3901
3902int
3903safe_cancel (Coro::State self, ...)
3904 C_ARGS: aTHX_ self, &ST (1), items - 1
3905
3906void
3907schedule (...)
3908 CODE:
3909 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3910
3911void
3912schedule_to (...)
3913 CODE:
3914 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3915
3916void
3917cede_to (...)
3918 CODE:
3919 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3920
3921void
3922cede (...)
3923 CODE:
3924 CORO_EXECUTE_SLF_XS (slf_init_cede);
3925
3926void
3927cede_notself (...)
3928 CODE:
3929 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3930
3931void
3932_set_current (SV *current)
1022 PROTOTYPE: $ 3933 PROTOTYPE: $
1023 CODE: 3934 CODE:
1024#if defined(__GLIBC__) || _POSIX_C_SOURCE 3935 SvREFCNT_dec (SvRV (coro_current));
1025 _exit (code); 3936 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1026#else
1027 signal (SIGTERM, SIG_DFL);
1028 raise (SIGTERM);
1029 exit (code);
1030#endif
1031
1032MODULE = Coro::State PACKAGE = Coro::Cont
1033
1034# this is slightly dirty (should expose a c-level api)
1035 3937
1036void 3938void
1037yield(...) 3939_set_readyhook (SV *hook)
1038 PROTOTYPE: @ 3940 PROTOTYPE: $
1039 CODE: 3941 CODE:
1040 static SV *returnstk;
1041 SV *sv;
1042 AV *defav = GvAV (PL_defgv);
1043 struct coro *prev, *next;
1044
1045 if (!returnstk)
1046 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048 /* set up @_ -- ugly */
1049 av_clear (defav);
1050 av_fill (defav, items - 1);
1051 while (items--)
1052 av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055 sv = av_pop ((AV *)SvRV (returnstk));
1056 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058 SvREFCNT_dec (sv); 3942 SvREFCNT_dec (coro_readyhook);
1059 3943 SvGETMAGIC (hook);
1060 transfer(aTHX_ prev, next, 0); 3944 if (SvOK (hook))
1061 3945 {
1062MODULE = Coro::State PACKAGE = Coro
1063
1064# this is slightly dirty (should expose a c-level api)
1065
1066BOOT:
1067{
1068 int i;
1069 HV *stash = gv_stashpv ("Coro", TRUE);
1070
1071 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080
1081 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082 coro_ready[i] = newAV (); 3946 coro_readyhook = newSVsv (hook);
1083 3947 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1084 {
1085 SV *sv = perl_get_sv("Coro::API", 1);
1086
1087 coroapi.schedule = api_schedule;
1088 coroapi.cede = api_cede;
1089 coroapi.ready = api_ready;
1090 coroapi.nready = &coro_nready;
1091 coroapi.current = coro_current;
1092
1093 GCoroAPI = &coroapi;
1094 sv_setiv(sv, (IV)&coroapi);
1095 SvREADONLY_on(sv);
1096 } 3948 }
1097} 3949 else
3950 {
3951 coro_readyhook = 0;
3952 CORO_READYHOOK = 0;
3953 }
1098 3954
1099void 3955int
3956prio (Coro::State coro, int newprio = 0)
3957 PROTOTYPE: $;$
3958 ALIAS:
3959 nice = 1
3960 CODE:
3961{
3962 RETVAL = coro->prio;
3963
3964 if (items > 1)
3965 {
3966 if (ix)
3967 newprio = coro->prio - newprio;
3968
3969 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3970 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3971
3972 coro->prio = newprio;
3973 }
3974}
3975 OUTPUT:
3976 RETVAL
3977
3978SV *
1100ready(self) 3979ready (SV *self)
1101 SV * self
1102 PROTOTYPE: $ 3980 PROTOTYPE: $
1103 CODE: 3981 CODE:
1104 api_ready (self); 3982 RETVAL = boolSV (api_ready (aTHX_ self));
3983 OUTPUT:
3984 RETVAL
1105 3985
1106int 3986int
1107nready(...) 3987nready (...)
1108 PROTOTYPE: 3988 PROTOTYPE:
1109 CODE: 3989 CODE:
1110 RETVAL = coro_nready; 3990 RETVAL = coro_nready;
1111 OUTPUT: 3991 OUTPUT:
1112 RETVAL 3992 RETVAL
1113 3993
1114void 3994void
1115schedule(...) 3995suspend (Coro::State self)
1116 PROTOTYPE: 3996 PROTOTYPE: $
1117 CODE: 3997 CODE:
1118 api_schedule (); 3998 self->flags |= CF_SUSPENDED;
1119 3999
1120void 4000void
1121cede(...) 4001resume (Coro::State self)
1122 PROTOTYPE: 4002 PROTOTYPE: $
1123 CODE: 4003 CODE:
4004 self->flags &= ~CF_SUSPENDED;
4005
4006void
4007_pool_handler (...)
4008 CODE:
4009 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4010
4011void
4012async_pool (SV *cv, ...)
4013 PROTOTYPE: &@
4014 PPCODE:
4015{
4016 HV *hv = (HV *)av_pop (av_async_pool);
4017 AV *av = newAV ();
4018 SV *cb = ST (0);
4019 int i;
4020
4021 av_extend (av, items - 2);
4022 for (i = 1; i < items; ++i)
4023 av_push (av, SvREFCNT_inc_NN (ST (i)));
4024
4025 if ((SV *)hv == &PL_sv_undef)
4026 {
4027 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4028 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4029 SvREFCNT_dec (sv);
4030 }
4031
4032 {
4033 struct coro *coro = SvSTATE_hv (hv);
4034
4035 assert (!coro->invoke_cb);
4036 assert (!coro->invoke_av);
4037 coro->invoke_cb = SvREFCNT_inc (cb);
4038 coro->invoke_av = av;
4039 }
4040
4041 api_ready (aTHX_ (SV *)hv);
4042
4043 if (GIMME_V != G_VOID)
4044 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4045 else
4046 SvREFCNT_dec (hv);
4047}
4048
4049SV *
4050rouse_cb ()
4051 PROTOTYPE:
4052 CODE:
4053 RETVAL = coro_new_rouse_cb (aTHX);
4054 OUTPUT:
4055 RETVAL
4056
4057void
4058rouse_wait (...)
4059 PROTOTYPE: ;$
4060 PPCODE:
4061 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4062
4063void
4064on_enter (SV *block)
4065 ALIAS:
4066 on_leave = 1
4067 PROTOTYPE: &
4068 CODE:
4069{
4070 struct coro *coro = SvSTATE_current;
4071 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4072
4073 block = s_get_cv_croak (block);
4074
4075 if (!*avp)
4076 *avp = newAV ();
4077
4078 av_push (*avp, SvREFCNT_inc (block));
4079
4080 if (!ix)
4081 on_enterleave_call (aTHX_ block);
4082
4083 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4084 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4085 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4086}
4087
4088
4089MODULE = Coro::State PACKAGE = PerlIO::cede
4090
4091BOOT:
4092 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4093
4094
4095MODULE = Coro::State PACKAGE = Coro::Semaphore
4096
4097SV *
4098new (SV *klass, SV *count = 0)
4099 CODE:
4100{
4101 int semcnt = 1;
4102
4103 if (count)
4104 {
4105 SvGETMAGIC (count);
4106
4107 if (SvOK (count))
4108 semcnt = SvIV (count);
4109 }
4110
4111 RETVAL = sv_bless (
4112 coro_waitarray_new (aTHX_ semcnt),
4113 GvSTASH (CvGV (cv))
4114 );
4115}
4116 OUTPUT:
4117 RETVAL
4118
4119# helper for Coro::Channel and others
4120SV *
4121_alloc (int count)
4122 CODE:
4123 RETVAL = coro_waitarray_new (aTHX_ count);
4124 OUTPUT:
4125 RETVAL
4126
4127SV *
4128count (SV *self)
4129 CODE:
4130 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4131 OUTPUT:
4132 RETVAL
4133
4134void
4135up (SV *self, int adjust = 1)
4136 ALIAS:
4137 adjust = 1
4138 CODE:
4139 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4140
4141void
4142down (...)
4143 CODE:
4144 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4145
4146void
4147wait (...)
4148 CODE:
4149 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4150
4151void
4152try (SV *self)
4153 PPCODE:
4154{
4155 AV *av = (AV *)SvRV (self);
4156 SV *count_sv = AvARRAY (av)[0];
4157 IV count = SvIVX (count_sv);
4158
4159 if (count > 0)
4160 {
4161 --count;
4162 SvIVX (count_sv) = count;
4163 XSRETURN_YES;
4164 }
4165 else
4166 XSRETURN_NO;
4167}
4168
4169void
4170waiters (SV *self)
4171 PPCODE:
4172{
4173 AV *av = (AV *)SvRV (self);
4174 int wcount = AvFILLp (av) + 1 - 1;
4175
4176 if (GIMME_V == G_SCALAR)
4177 XPUSHs (sv_2mortal (newSViv (wcount)));
4178 else
4179 {
4180 int i;
4181 EXTEND (SP, wcount);
4182 for (i = 1; i <= wcount; ++i)
4183 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4184 }
4185}
4186
4187MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4188
4189void
4190_may_delete (SV *sem, int count, unsigned int extra_refs)
4191 PPCODE:
4192{
4193 AV *av = (AV *)SvRV (sem);
4194
4195 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4196 && AvFILLp (av) == 0 /* no waiters, just count */
4197 && SvIV (AvARRAY (av)[0]) == count)
4198 XSRETURN_YES;
4199
4200 XSRETURN_NO;
4201}
4202
4203MODULE = Coro::State PACKAGE = Coro::Signal
4204
4205SV *
4206new (SV *klass)
4207 CODE:
4208 RETVAL = sv_bless (
4209 coro_waitarray_new (aTHX_ 0),
4210 GvSTASH (CvGV (cv))
4211 );
4212 OUTPUT:
4213 RETVAL
4214
4215void
4216wait (...)
4217 CODE:
4218 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4219
4220void
4221broadcast (SV *self)
4222 CODE:
4223{
4224 AV *av = (AV *)SvRV (self);
4225 coro_signal_wake (aTHX_ av, AvFILLp (av));
4226}
4227
4228void
4229send (SV *self)
4230 CODE:
4231{
4232 AV *av = (AV *)SvRV (self);
4233
4234 if (AvFILLp (av))
4235 coro_signal_wake (aTHX_ av, 1);
4236 else
4237 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4238}
4239
4240IV
4241awaited (SV *self)
4242 CODE:
4243 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4244 OUTPUT:
4245 RETVAL
4246
4247
4248MODULE = Coro::State PACKAGE = Coro::AnyEvent
4249
4250BOOT:
4251 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4252
4253void
4254_schedule (...)
4255 CODE:
4256{
4257 static int incede;
4258
1124 api_cede (); 4259 api_cede_notself (aTHX);
1125 4260
4261 ++incede;
4262 while (coro_nready >= incede && api_cede (aTHX))
4263 ;
4264
4265 sv_setsv (sv_activity, &PL_sv_undef);
4266 if (coro_nready >= incede)
4267 {
4268 PUSHMARK (SP);
4269 PUTBACK;
4270 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4271 }
4272
4273 --incede;
4274}
4275
4276
4277MODULE = Coro::State PACKAGE = Coro::AIO
4278
4279void
4280_register (char *target, char *proto, SV *req)
4281 CODE:
4282{
4283 SV *req_cv = s_get_cv_croak (req);
4284 /* newXSproto doesn't return the CV on 5.8 */
4285 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4286 sv_setpv ((SV *)slf_cv, proto);
4287 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4288}
4289
4290MODULE = Coro::State PACKAGE = Coro::Select
4291
4292void
4293patch_pp_sselect ()
4294 CODE:
4295 if (!coro_old_pp_sselect)
4296 {
4297 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4298 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4299 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4300 }
4301
4302void
4303unpatch_pp_sselect ()
4304 CODE:
4305 if (coro_old_pp_sselect)
4306 {
4307 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4308 coro_old_pp_sselect = 0;
4309 }
4310
4311MODULE = Coro::State PACKAGE = Coro::Util
4312
4313void
4314_exit (int code)
4315 CODE:
4316 _exit (code);
4317
4318NV
4319time ()
4320 CODE:
4321 RETVAL = nvtime (aTHX);
4322 OUTPUT:
4323 RETVAL
4324
4325NV
4326gettimeofday ()
4327 PPCODE:
4328{
4329 UV tv [2];
4330 u2time (aTHX_ tv);
4331 EXTEND (SP, 2);
4332 PUSHs (sv_2mortal (newSVuv (tv [0])));
4333 PUSHs (sv_2mortal (newSVuv (tv [1])));
4334}
4335

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