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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.441 by root, Tue Mar 4 05:07:44 2014 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 "libcoro/coro.c" 16#include "schmorp.h"
6 17
7#include <signal.h> 18#define ECB_NO_THREADS 1
19#define ECB_NO_LIBM 1
20#include "ecb.h"
8 21
9#ifdef HAVE_MMAP 22#include <stddef.h>
10# include <unistd.h> 23#include <stdio.h>
11# include <sys/mman.h> 24#include <errno.h>
12# ifndef MAP_ANON 25#include <assert.h>
13# ifdef MAP_ANONYMOUS 26
14# define MAP_ANON MAP_ANONYMOUS 27#ifndef SVs_PADSTALE
15# else 28# define SVs_PADSTALE 0
16# undef HAVE_MMAP
17# endif 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;
18# endif 39# endif
40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
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))
19#endif 46#endif
20 47
21#define MAY_FLUSH /* increases codesize */ 48/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
49/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
50#if PERL_VERSION_ATLEAST(5,19,0)
51# define SVt_BIND SVt_IV
52#endif
22 53
23/* perl-related */ 54#if defined(_WIN32)
24#define TRANSFER_SAVE_DEFAV 0x00000001 55# undef HAS_GETTIMEOFDAY
25#define TRANSFER_SAVE_DEFSV 0x00000002 56# undef setjmp
26#define TRANSFER_SAVE_ERRSV 0x00000004 57# undef longjmp
27/* c-related */ 58# undef _exit
28#define TRANSFER_SAVE_CCTXT 0x00000008 59# define setjmp _setjmp /* deep magic */
29#ifdef CORO_LAZY_STACK
30# define TRANSFER_LAZY_STACK 0x00000010
31#else 60#else
32# define TRANSFER_LAZY_STACK 0x00000000 61# include <inttypes.h> /* most portable stdint.h */
62#endif
63
64/* the maximum number of idle cctx that will be pooled */
65static int cctx_max_idle = 4;
66
67#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
68# define HAS_SCOPESTACK_NAME 1
69#endif
70
71/* prefer perl internal functions over our own? */
72#ifndef CORO_PREFER_PERL_FUNCTIONS
73# define CORO_PREFER_PERL_FUNCTIONS 0
74#endif
75
76/* The next macros try to return the current stack pointer, in an as
77 * portable way as possible. */
78#if __GNUC__ >= 4
79# define dSTACKLEVEL int stacklevel_dummy
80# define STACKLEVEL __builtin_frame_address (0)
81#else
82# define dSTACKLEVEL volatile void *stacklevel
83# define STACKLEVEL ((void *)&stacklevel)
84#endif
85
86#define IN_DESTRUCT PL_dirty
87
88#include "CoroAPI.h"
89#define GCoroAPI (&coroapi) /* very sneaky */
90
91#ifdef USE_ITHREADS
92# if CORO_PTHREAD
93static void *coro_thx;
33#endif 94# endif
95#endif
34 96
35#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 97#ifdef __linux
36 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 98# include <time.h> /* for timespec */
99# include <syscall.h> /* for SYS_* */
100# ifdef SYS_clock_gettime
101# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
102# define CORO_CLOCK_MONOTONIC 1
103# define CORO_CLOCK_THREAD_CPUTIME_ID 3
104# endif
105#endif
37 106
38#define SUB_INIT "Coro::State::initialize" 107static double (*nvtime)(); /* so why doesn't it take void? */
39#define UCORO_STATE "_coro_state" 108static void (*u2time)(pTHX_ UV ret[2]);
40 109
41/* The next macro should delcare a variable stacklevel that contains and approximation 110/* we hijack an hopefully unused CV flag for our purposes */
42 * to the current C stack pointer. It's property is that it changes with each call 111#define CVf_SLF 0x4000
43 * and should be unique. */ 112static OP *pp_slf (pTHX);
44#define dSTACKLEVEL void *stacklevel = &stacklevel 113static void slf_destroy (pTHX_ struct coro *coro);
45 114
46#define labs(l) ((l) >= 0 ? (l) : -(l)) 115static U32 cctx_gen;
116static size_t cctx_stacksize = CORO_STACKSIZE;
117static struct CoroAPI coroapi;
118static AV *main_mainstack; /* used to differentiate between $main and others */
119static JMPENV *main_top_env;
120static HV *coro_state_stash, *coro_stash;
121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
47 122
48/* this is actually not only the c stack but also c registers etc... */ 123static AV *av_destroy; /* destruction queue */
124static SV *sv_manager; /* the manager coro */
125static SV *sv_idle; /* $Coro::idle */
126
127static GV *irsgv; /* $/ */
128static GV *stdoutgv; /* *STDOUT */
129static SV *rv_diehook;
130static SV *rv_warnhook;
131static HV *hv_sig; /* %SIG */
132
133/* async_pool helper stuff */
134static SV *sv_pool_rss;
135static SV *sv_pool_size;
136static SV *sv_async_pool_idle; /* description string */
137static AV *av_async_pool; /* idle pool */
138static SV *sv_Coro; /* class string */
139static CV *cv_pool_handler;
140
141/* Coro::AnyEvent */
142static SV *sv_activity;
143
144/* enable processtime/realtime profiling */
145static char enable_times;
146typedef U32 coro_ts[2];
147static coro_ts time_real, time_cpu;
148static char times_valid;
149
150static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle;
152
153enum
154{
155 CC_MAPPED = 0x01,
156 CC_NOREUSE = 0x02, /* throw this away after tracing */
157 CC_TRACE = 0x04,
158 CC_TRACE_SUB = 0x08, /* trace sub calls */
159 CC_TRACE_LINE = 0x10, /* trace each statement */
160 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
161};
162
163/* this is a structure representing a c-level coroutine */
49typedef struct { 164typedef struct coro_cctx
50 int refcnt; /* pointer reference counter */ 165{
51 int usecnt; /* shared by how many coroutines */ 166 struct coro_cctx *next;
52 int gencnt; /* generation counter */
53 167
168 /* the stack */
169 struct coro_stack stack;
170
171 /* cpu state */
172 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
173#ifndef NDEBUG
174 JMPENV *idle_te; /* same as idle_sp, but for top_env */
175#endif
176 JMPENV *top_env;
54 coro_context cctx; 177 coro_context cctx;
55 178
56 void *sptr; 179 U32 gen;
57 long ssize; /* positive == mmap, otherwise malloc */ 180#if CORO_USE_VALGRIND
58} coro_stack; 181 int valgrind_id;
182#endif
183 unsigned char flags;
184} coro_cctx;
59 185
186static coro_cctx *cctx_current; /* the currently running cctx */
187
188/*****************************************************************************/
189
190static MGVTBL coro_state_vtbl;
191
192enum
193{
194 CF_RUNNING = 0x0001, /* coroutine is running */
195 CF_READY = 0x0002, /* coroutine is ready */
196 CF_NEW = 0x0004, /* has never been switched to */
197 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
198 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
199 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
200};
201
202/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct
204{
205 #define VARx(name,expr,type) type name;
206 #include "state.h"
207} perl_slots;
208
209/* how many context stack entries do we need for perl_slots */
210#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
211
212/* this is a structure representing a perl-level coroutine */
60struct coro { 213struct coro
61 /* the optional C context */ 214{
62 coro_stack *stack; 215 /* the C coroutine allocated to this perl coroutine, if any */
63 void *cursp; 216 coro_cctx *cctx;
64 int gencnt;
65 217
66 /* optionally saved, might be zero */ 218 /* ready queue */
67 AV *defav; 219 struct coro *next_ready;
68 SV *defsv;
69 SV *errsv;
70
71 /* saved global state not related to stacks */
72 U8 dowarn;
73 I32 in_eval;
74 220
75 /* the stacks and related info (callchain etc..) */ 221 /* state data */
76 PERL_SI *curstackinfo; 222 struct CoroSLF slf_frame; /* saved slf frame */
77 AV *curstack;
78 AV *mainstack; 223 AV *mainstack;
79 SV **stack_sp; 224 perl_slots *slot; /* basically the saved sp */
80 OP *op;
81 SV **curpad;
82 SV **stack_base;
83 SV **stack_max;
84 SV **tmps_stack;
85 I32 tmps_floor;
86 I32 tmps_ix;
87 I32 tmps_max;
88 I32 *markstack;
89 I32 *markstack_ptr;
90 I32 *markstack_max;
91 I32 *scopestack;
92 I32 scopestack_ix;
93 I32 scopestack_max;
94 ANY *savestack;
95 I32 savestack_ix;
96 I32 savestack_max;
97 OP **retstack;
98 I32 retstack_ix;
99 I32 retstack_max;
100 COP *curcop;
101 JMPENV *top_env;
102 225
226 CV *startcv; /* the CV to execute */
103 /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
104 AV *args; 228 int flags; /* CF_ flags */
229 HV *hv; /* the perl hash associated with this coro, if any */
230
231 /* statistics */
232 int usecount; /* number of transfers to this coro */
233
234 /* coro process data */
235 int prio;
236 SV *except; /* exception to be thrown */
237 SV *rouse_cb; /* last rouse callback */
238 AV *on_destroy; /* callbacks or coros to notify on destroy */
239 AV *status; /* the exit status list */
240
241 /* async_pool */
242 SV *saved_deffh;
243 SV *invoke_cb;
244 AV *invoke_av;
245
246 /* on_enter/on_leave */
247 AV *on_enter;
248 AV *on_leave;
249
250 /* swap_sv */
251 AV *swap_sv;
252
253 /* times */
254 coro_ts t_cpu, t_real;
255
256 /* linked list */
257 struct coro *next, *prev;
105}; 258};
106 259
107typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
108typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
109 262
110static AV *main_mainstack; /* used to differentiate between $main and others */ 263/* the following variables are effectively part of the perl context */
111static HV *coro_state_stash; 264/* and get copied between struct coro and these variables */
112static SV *ucoro_state_sv; 265/* the main reason we don't support windows process emulation */
113static U32 ucoro_state_hash; 266static struct CoroSLF slf_frame; /* the current slf frame */
114static HV *padlist_cache; 267
268/** Coro ********************************************************************/
269
270#define CORO_PRIO_MAX 3
271#define CORO_PRIO_HIGH 1
272#define CORO_PRIO_NORMAL 0
273#define CORO_PRIO_LOW -1
274#define CORO_PRIO_IDLE -3
275#define CORO_PRIO_MIN -4
115 276
116/* for Coro.pm */ 277/* for Coro.pm */
117static GV *coro_current, *coro_idle; 278static SV *coro_current;
118static AV *coro_ready; 279static SV *coro_readyhook;
280static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
281static CV *cv_coro_run;
282static struct coro *coro_first;
283#define coro_nready coroapi.nready
119 284
120/* mostly copied from op.c:cv_clone2 */ 285/** JIT *********************************************************************/
121STATIC AV * 286
122clone_padlist (AV *protopadlist) 287#if CORO_JIT
288 /* APPLE doesn't have mmap though */
289 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
290 #ifndef CORO_JIT_TYPE
291 #if ECB_AMD64 && CORO_JIT_UNIXY
292 #define CORO_JIT_TYPE "amd64-unix"
293 #elif __i386 && CORO_JIT_UNIXY
294 #define CORO_JIT_TYPE "x86-unix"
295 #endif
296 #endif
297#endif
298
299#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
300 #undef CORO_JIT
301#endif
302
303#if CORO_JIT
304 typedef void (*load_save_perl_slots_type)(perl_slots *);
305 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
306#endif
307
308/** Coro::Select ************************************************************/
309
310static OP *(*coro_old_pp_sselect) (pTHX);
311static SV *coro_select_select;
312
313/* horrible hack, but if it works... */
314static OP *
315coro_pp_sselect (pTHX)
123{ 316{
124 AV *av; 317 dSP;
125 I32 ix; 318 PUSHMARK (SP - 4); /* fake argument list */
126 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 319 XPUSHs (coro_select_select);
127 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 320 PUTBACK;
128 SV **pname = AvARRAY (protopad_name); 321
129 SV **ppad = AvARRAY (protopad); 322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
130 I32 fname = AvFILLp (protopad_name); 323 PL_op->op_flags |= OPf_STACKED;
131 I32 fpad = AvFILLp (protopad); 324 PL_op->op_private = 0;
132 AV *newpadlist, *newpad_name, *newpad; 325 return PL_ppaddr [OP_ENTERSUB](aTHX);
326}
327
328/** time stuff **************************************************************/
329
330#ifdef HAS_GETTIMEOFDAY
331
332ecb_inline void
333coro_u2time (pTHX_ UV ret[2])
334{
335 struct timeval tv;
336 gettimeofday (&tv, 0);
337
338 ret [0] = tv.tv_sec;
339 ret [1] = tv.tv_usec;
340}
341
342ecb_inline double
343coro_nvtime (void)
344{
345 struct timeval tv;
346 gettimeofday (&tv, 0);
347
348 return tv.tv_sec + tv.tv_usec * 1e-6;
349}
350
351ecb_inline void
352time_init (pTHX)
353{
354 nvtime = coro_nvtime;
355 u2time = coro_u2time;
356}
357
358#else
359
360ecb_inline void
361time_init (pTHX)
362{
133 SV **npad; 363 SV **svp;
134 364
135 newpad_name = newAV (); 365 require_pv ("Time/HiRes.pm");
136 for (ix = fname; ix >= 0; ix--)
137 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138 366
139 newpad = newAV (); 367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
140 av_fill (newpad, AvFILLp (protopad));
141 npad = AvARRAY (newpad);
142 368
143 newpadlist = newAV (); 369 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
370 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
371
372 nvtime = INT2PTR (double (*)(), SvIV (*svp));
373
374 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
375 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
376}
377
378#endif
379
380/** lowlevel stuff **********************************************************/
381
382static SV * ecb_noinline
383coro_get_sv (pTHX_ const char *name, int create)
384{
385#if PERL_VERSION_ATLEAST (5,10,0)
386 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
387 get_sv (name, create);
388#endif
389 return get_sv (name, create);
390}
391
392static AV * ecb_noinline
393coro_get_av (pTHX_ const char *name, int create)
394{
395#if PERL_VERSION_ATLEAST (5,10,0)
396 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
397 get_av (name, create);
398#endif
399 return get_av (name, create);
400}
401
402static HV * ecb_noinline
403coro_get_hv (pTHX_ const char *name, int create)
404{
405#if PERL_VERSION_ATLEAST (5,10,0)
406 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
407 get_hv (name, create);
408#endif
409 return get_hv (name, create);
410}
411
412ecb_inline void
413coro_times_update (void)
414{
415#ifdef coro_clock_gettime
416 struct timespec ts;
417
418 ts.tv_sec = ts.tv_nsec = 0;
419 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
420 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
421
422 ts.tv_sec = ts.tv_nsec = 0;
423 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
424 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
425#else
426 dTHX;
427 UV tv[2];
428
429 u2time (aTHX_ tv);
430 time_real [0] = tv [0];
431 time_real [1] = tv [1] * 1000;
432#endif
433}
434
435ecb_inline void
436coro_times_add (struct coro *c)
437{
438 c->t_real [1] += time_real [1];
439 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
440 c->t_real [0] += time_real [0];
441
442 c->t_cpu [1] += time_cpu [1];
443 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
444 c->t_cpu [0] += time_cpu [0];
445}
446
447ecb_inline void
448coro_times_sub (struct coro *c)
449{
450 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
451 c->t_real [1] -= time_real [1];
452 c->t_real [0] -= time_real [0];
453
454 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
455 c->t_cpu [1] -= time_cpu [1];
456 c->t_cpu [0] -= time_cpu [0];
457}
458
459/*****************************************************************************/
460/* magic glue */
461
462#define CORO_MAGIC_type_cv 26
463#define CORO_MAGIC_type_state PERL_MAGIC_ext
464
465#define CORO_MAGIC_NN(sv, type) \
466 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
467 ? SvMAGIC (sv) \
468 : mg_find (sv, type))
469
470#define CORO_MAGIC(sv, type) \
471 (ecb_expect_true (SvMAGIC (sv)) \
472 ? CORO_MAGIC_NN (sv, type) \
473 : 0)
474
475#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
476#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
477
478ecb_inline MAGIC *
479SvSTATEhv_p (pTHX_ SV *coro)
480{
481 MAGIC *mg;
482
483 if (ecb_expect_true (
484 SvTYPE (coro) == SVt_PVHV
485 && (mg = CORO_MAGIC_state (coro))
486 && mg->mg_virtual == &coro_state_vtbl
487 ))
488 return mg;
489
490 return 0;
491}
492
493ecb_inline struct coro *
494SvSTATE_ (pTHX_ SV *coro)
495{
496 MAGIC *mg;
497
498 if (SvROK (coro))
499 coro = SvRV (coro);
500
501 mg = SvSTATEhv_p (aTHX_ coro);
502 if (!mg)
503 croak ("Coro::State object required");
504
505 return (struct coro *)mg->mg_ptr;
506}
507
508#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
509
510/* faster than SvSTATE, but expects a coroutine hv */
511#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
512#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
513
514/*****************************************************************************/
515/* padlist management and caching */
516
517ecb_inline PADLIST *
518coro_derive_padlist (pTHX_ CV *cv)
519{
520 PADLIST *padlist = CvPADLIST (cv);
521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
524
525#if NEWPADAPI
526
527 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
528 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
529 while (!PadlistARRAY (padlist)[off - 1])
530 --off;
531
532 Perl_pad_push (aTHX_ padlist, off);
533
534 newpad = PadlistARRAY (padlist)[off];
535 PadlistARRAY (padlist)[off] = 0;
536
537#else
538
539#if PERL_VERSION_ATLEAST (5,10,0)
540 Perl_pad_push (aTHX_ padlist, off);
541#else
542 Perl_pad_push (aTHX_ padlist, off, 1);
543#endif
544
545 newpad = PadlistARRAY (padlist)[off];
546 PadlistMAX (padlist) = off - 1;
547
548#endif
549
550 newPADLIST (newpadlist);
551#if !PERL_VERSION_ATLEAST(5,15,3)
552 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
144 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
145 av_store (newpadlist, 0, (SV *) newpad_name); 554#endif
146 av_store (newpadlist, 1, (SV *) newpad);
147 555
148 av = newAV (); /* will be @_ */ 556 /* Already extended to 2 elements by newPADLIST. */
149 av_extend (av, 0); 557 PadlistMAX (newpadlist) = 1;
150 av_store (newpad, 0, (SV *) av); 558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
151 AvFLAGS (av) = AVf_REIFY; 559 PadlistARRAY (newpadlist)[1] = newpad;
152 560
153 for (ix = fpad; ix > 0; ix--) 561 return newpadlist;
562}
563
564ecb_inline void
565free_padlist (pTHX_ PADLIST *padlist)
566{
567 /* may be during global destruction */
568 if (!IN_DESTRUCT)
154 { 569 {
155 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 570 I32 i = PadlistMAX (padlist);
156 if (namesv && namesv != &PL_sv_undef) 571
572 while (i > 0) /* special-case index 0 */
157 { 573 {
158 char *name = SvPVX (namesv); /* XXX */ 574 /* we try to be extra-careful here */
159 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 575 PAD *pad = PadlistARRAY (padlist)[i--];
160 { /* lexical from outside? */ 576
161 npad[ix] = SvREFCNT_inc (ppad[ix]); 577 if (pad)
162 } 578 {
163 else 579 I32 j = PadMAX (pad);
164 { /* our own lexical */ 580
165 SV *sv; 581 while (j >= 0)
166 if (*name == '&') 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
583
584 PadMAX (pad) = -1;
167 sv = SvREFCNT_inc (ppad[ix]); 585 SvREFCNT_dec (pad);
168 else if (*name == '@')
169 sv = (SV *) newAV ();
170 else if (*name == '%')
171 sv = (SV *) newHV ();
172 else
173 sv = NEWSV (0, 0);
174 if (!SvPADBUSY (sv))
175 SvPADMY_on (sv);
176 npad[ix] = sv;
177 } 586 }
178 } 587 }
179 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
180 {
181 npad[ix] = SvREFCNT_inc (ppad[ix]);
182 }
183 else
184 {
185 SV *sv = NEWSV (0, 0);
186 SvPADTMP_on (sv);
187 npad[ix] = sv;
188 }
189 }
190 588
191#if 0 /* return -ENOTUNDERSTOOD */ 589 SvREFCNT_dec (PadlistNAMES (padlist));
192 /* Now that vars are all in place, clone nested closures. */
193 590
194 for (ix = fpad; ix > 0; ix--) { 591#if NEWPADAPI
195 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 592 Safefree (PadlistARRAY (padlist));
196 if (namesv 593 Safefree (padlist);
197 && namesv != &PL_sv_undef 594#else
198 && !(SvFLAGS(namesv) & SVf_FAKE)
199 && *SvPVX(namesv) == '&'
200 && CvCLONE(ppad[ix]))
201 {
202 CV *kid = cv_clone((CV*)ppad[ix]);
203 SvREFCNT_dec(ppad[ix]);
204 CvCLONE_on(kid);
205 SvPADMY_on(kid);
206 npad[ix] = (SV*)kid;
207 }
208 }
209#endif
210
211 return newpadlist;
212}
213
214#ifdef MAY_FLUSH
215STATIC AV *
216free_padlist (AV *padlist)
217{
218 /* may be during global destruction */
219 if (SvREFCNT(padlist))
220 {
221 I32 i = AvFILLp(padlist); 595 AvFILLp (padlist) = -1;
222 while (i >= 0) 596 AvREAL_off (padlist);
223 {
224 SV **svp = av_fetch(padlist, i--, FALSE);
225 SV *sv = svp ? *svp : Nullsv;
226 if (sv)
227 SvREFCNT_dec(sv);
228 }
229
230 SvREFCNT_dec((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
599 }
600}
601
602static int
603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
604{
605 PADLIST *padlist;
606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
608
609 /* perl manages to free our internal AV and _then_ call us */
610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
614 free_padlist (aTHX_ padlists[len]);
615
616 return 0;
617}
618
619static MGVTBL coro_cv_vtbl = {
620 0, 0, 0, 0,
621 coro_cv_free
622};
623
624/* the next two functions merely cache the padlists */
625ecb_inline void
626get_padlist (pTHX_ CV *cv)
627{
628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 size_t *lenp;
630
631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
633 else
634 {
635#if CORO_PREFER_PERL_FUNCTIONS
636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
638 CV *cp = Perl_cv_clone (aTHX_ cv);
639 CvPADLIST (cv) = CvPADLIST (cp);
640 CvPADLIST (cp) = 0;
641 SvREFCNT_dec (cp);
642#else
643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
644#endif
645 }
646}
647
648ecb_inline void
649put_padlist (pTHX_ CV *cv)
650{
651 MAGIC *mg = CORO_MAGIC_cv (cv);
652
653 if (ecb_expect_false (!mg))
654 {
655 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
656 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
657 mg->mg_len = 1; /* so mg_free frees mg_ptr */
658 }
659 else
660 Renew (mg->mg_ptr,
661 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
662 char);
663
664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
665}
666
667/** load & save, init *******************************************************/
668
669ecb_inline void
670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
674
675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
677
678 /* swap sv_flags */
679 SvFLAGS (&tmp) = SvFLAGS (a);
680 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
681 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
682
683#if PERL_VERSION_ATLEAST (5,10,0)
684 /* perl 5.10 and later complicates this _quite_ a bit, but it also
685 * is much faster, so no quarrels here. alternatively, we could
686 * sv_upgrade to avoid this.
687 */
688 {
689 /* swap sv_u */
690 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
691
692 /* if SvANY points to the head, we need to adjust the pointers,
693 * as the pointer for a still points to b, and maybe vice versa.
694 */
695 #define svany_in_head(type) \
696 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
697
698 if (svany_in_head (SvTYPE (a)))
699 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
700
701 if (svany_in_head (SvTYPE (b)))
702 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
231 } 703 }
232}
233#endif 704#endif
234
235/* the next two functions merely cache the padlists */
236STATIC void
237get_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
240
241 if (he && AvFILLp ((AV *)*he) >= 0)
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
243 else
244 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245} 705}
246 706
247STATIC void 707/* swap sv heads, at least logically */
248put_padlist (CV *cv)
249{
250 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
251
252 if (SvTYPE (*he) != SVt_PVAV)
253 {
254 SvREFCNT_dec (*he);
255 *he = (SV *)newAV ();
256 }
257
258 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
259}
260
261#ifdef MAY_FLUSH
262STATIC void
263flush_padlist_cache ()
264{
265 HV *hv = padlist_cache;
266 padlist_cache = newHV ();
267
268 if (hv_iterinit (hv))
269 {
270 HE *he;
271 AV *padlist;
272
273 while (!!(he = hv_iternext (hv)))
274 {
275 AV *av = (AV *)HeVAL(he);
276
277 /* casting is fun. */
278 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
279 free_padlist (padlist);
280 }
281 }
282
283 SvREFCNT_dec (hv);
284}
285#endif
286
287#define SB do {
288#define SE } while (0)
289
290#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
291#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
292
293#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
294
295static void 708static void
709swap_svs (pTHX_ Coro__State c)
710{
711 int i;
712
713 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
714 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
715}
716
717#define SWAP_SVS(coro) \
718 if (ecb_expect_false ((coro)->swap_sv)) \
719 swap_svs (aTHX_ (coro))
720
721static void
722on_enterleave_call (pTHX_ SV *cb);
723
724static void
296load_state(pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
297{ 726{
298 PL_dowarn = c->dowarn; 727 perl_slots *slot = c->slot;
299 PL_in_eval = c->in_eval; 728 c->slot = 0;
300 729
301 PL_curstackinfo = c->curstackinfo;
302 PL_curstack = c->curstack;
303 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
304 PL_stack_sp = c->stack_sp;
305 PL_op = c->op;
306 PL_curpad = c->curpad;
307 PL_stack_base = c->stack_base;
308 PL_stack_max = c->stack_max;
309 PL_tmps_stack = c->tmps_stack;
310 PL_tmps_floor = c->tmps_floor;
311 PL_tmps_ix = c->tmps_ix;
312 PL_tmps_max = c->tmps_max;
313 PL_markstack = c->markstack;
314 PL_markstack_ptr = c->markstack_ptr;
315 PL_markstack_max = c->markstack_max;
316 PL_scopestack = c->scopestack;
317 PL_scopestack_ix = c->scopestack_ix;
318 PL_scopestack_max = c->scopestack_max;
319 PL_savestack = c->savestack;
320 PL_savestack_ix = c->savestack_ix;
321 PL_savestack_max = c->savestack_max;
322 PL_retstack = c->retstack;
323 PL_retstack_ix = c->retstack_ix;
324 PL_retstack_max = c->retstack_max;
325 PL_curcop = c->curcop;
326 PL_top_env = c->top_env;
327 731
328 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 732#if CORO_JIT
329 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 733 load_perl_slots (slot);
330 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 734#else
735 #define VARx(name,expr,type) expr = slot->name;
736 #include "state.h"
737#endif
331 738
332 { 739 {
333 dSP; 740 dSP;
741
334 CV *cv; 742 CV *cv;
335 743
336 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
337 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
338 { 746 {
339 AV *padlist = (AV *)POPs;
340
341 if (padlist)
342 {
343 put_padlist (cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
344 CvPADLIST(cv) = padlist; 748 CvDEPTH (cv) = PTR2IV (POPs);
345#ifdef USE_THREADS 749 CvPADLIST (cv) = (PADLIST *)POPs;
346 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
347#endif
348 }
349
350 ++CvDEPTH(cv);
351 } 750 }
352 751
353 PUTBACK; 752 PUTBACK;
354 } 753 }
355}
356 754
755 slf_frame = c->slf_frame;
756 CORO_THROW = c->except;
757
758 if (ecb_expect_false (enable_times))
759 {
760 if (ecb_expect_false (!times_valid))
761 coro_times_update ();
762
763 coro_times_sub (c);
764 }
765
766 if (ecb_expect_false (c->on_enter))
767 {
768 int i;
769
770 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
771 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
772 }
773
774 SWAP_SVS (c);
775}
776
357static void 777static void
358save_state(pTHX_ Coro__State c, int flags) 778save_perl (pTHX_ Coro__State c)
359{ 779{
780 SWAP_SVS (c);
781
782 if (ecb_expect_false (c->on_leave))
783 {
784 int i;
785
786 for (i = AvFILLp (c->on_leave); i >= 0; --i)
787 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
788 }
789
790 times_valid = 0;
791
792 if (ecb_expect_false (enable_times))
793 {
794 coro_times_update (); times_valid = 1;
795 coro_times_add (c);
796 }
797
798 c->except = CORO_THROW;
799 c->slf_frame = slf_frame;
800
360 { 801 {
361 dSP; 802 dSP;
362 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
363 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
364 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
366 /* 807 /*
367 * the worst thing you can imagine happens first - we have to save 808 * the worst thing you can imagine happens first - we have to save
368 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
369 */ 810 */
370 811
371 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
372 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
373 for (;;) 814 for (;;)
374 { 815 {
375 do 816 while (ecb_expect_true (cxix >= 0))
376 { 817 {
377 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
378 819
379 if (CxTYPE(cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
380 { 821 {
381 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
823
382 if (CvDEPTH(cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
383 { 825 {
384#ifdef USE_THREADS
385 /*XPUSHs ((SV *)CvOWNER(cv));*/
386 /*CvOWNER(cv) = 0;*/
387 /*error must unlock this cv etc.. etc...*/
388#endif
389 EXTEND (SP, CvDEPTH(cv)*2); 826 EXTEND (SP, 3);
390
391 while (--CvDEPTH(cv))
392 {
393 /* this tells the restore code to increment CvDEPTH */
394 PUSHs (Nullsv);
395 PUSHs ((SV *)cv);
396 }
397
398 PUSHs ((SV *)CvPADLIST(cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
399 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
400 830
401 get_padlist (cv); /* this is a monster */ 831 CvDEPTH (cv) = 0;
832 get_padlist (aTHX_ cv);
402 } 833 }
403 } 834 }
404 else if (CxTYPE(cx) == CXt_FORMAT)
405 {
406 /* I never used formats, so how should I know how these are implemented? */
407 /* my bold guess is as a simple, plain sub... */
408 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409 }
410 } 835 }
411 while (cxix >= 0);
412 836
413 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
414 break; 838 break;
415 839
416 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
417 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
418 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
419 } 843 }
420 844
421 PUTBACK; 845 PUTBACK;
422 } 846 }
423 847
424 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
425 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
426 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
851 unsigned int i;
427 852
428 /* I have not the slightest idea of why av_reify is necessary */ 853 for (i = 0; i < SLOT_COUNT; ++i)
429 /* but if it's missing the defav contents magically get replaced sometimes */ 854 CXINC;
430 if (c->defav)
431 av_reify (c->defav);
432 855
433 c->dowarn = PL_dowarn; 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
434 c->in_eval = PL_in_eval; 857 }
435 858
436 c->curstackinfo = PL_curstackinfo;
437 c->curstack = PL_curstack;
438 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
439 c->stack_sp = PL_stack_sp; 860
440 c->op = PL_op; 861 {
441 c->curpad = PL_curpad; 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
442 c->stack_base = PL_stack_base; 863
443 c->stack_max = PL_stack_max; 864#if CORO_JIT
444 c->tmps_stack = PL_tmps_stack; 865 save_perl_slots (slot);
445 c->tmps_floor = PL_tmps_floor; 866#else
446 c->tmps_ix = PL_tmps_ix; 867 #define VARx(name,expr,type) slot->name = expr;
447 c->tmps_max = PL_tmps_max; 868 #include "state.h"
448 c->markstack = PL_markstack; 869#endif
449 c->markstack_ptr = PL_markstack_ptr; 870 }
450 c->markstack_max = PL_markstack_max;
451 c->scopestack = PL_scopestack;
452 c->scopestack_ix = PL_scopestack_ix;
453 c->scopestack_max = PL_scopestack_max;
454 c->savestack = PL_savestack;
455 c->savestack_ix = PL_savestack_ix;
456 c->savestack_max = PL_savestack_max;
457 c->retstack = PL_retstack;
458 c->retstack_ix = PL_retstack_ix;
459 c->retstack_max = PL_retstack_max;
460 c->curcop = PL_curcop;
461 c->top_env = PL_top_env;
462} 871}
463 872
464/* 873/*
465 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
466 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
467 * on the assumption that coroutines do not usually need 876 * on the (sometimes correct) assumption that coroutines do
468 * a lot of stackspace. 877 * not usually need a lot of stackspace.
469 */ 878 */
470STATIC void 879#if CORO_PREFER_PERL_FUNCTIONS
880# define coro_init_stacks(thx) init_stacks ()
881#else
882static void
471coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
472{ 884{
473 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
474 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
475 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
476 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477 889
478 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
479 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
480 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481 893
482 New(50,PL_tmps_stack,96,SV*); 894 New(50,PL_tmps_stack,32,SV*);
483 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
484 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
485 PL_tmps_max = 96; 897 PL_tmps_max = 32;
486 898
487 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
488 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
489 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
490 902
903#ifdef SET_MARK_OFFSET
491 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
905#endif
492 906
493 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
494 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
495 PL_scopestack_max = 16; 909 PL_scopestack_max = 8;
910#if HAS_SCOPESTACK_NAME
911 New(54,PL_scopestack_name,8,const char*);
912#endif
496 913
497 New(54,PL_savestack,96,ANY); 914 New(54,PL_savestack,24,ANY);
498 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
499 PL_savestack_max = 96; 916 PL_savestack_max = 24;
500 917
918#if !PERL_VERSION_ATLEAST (5,10,0)
501 New(54,PL_retstack,8,OP*); 919 New(54,PL_retstack,4,OP*);
502 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
503 PL_retstack_max = 8; 921 PL_retstack_max = 4;
922#endif
504} 923}
924#endif
505 925
506/* 926/*
507 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
508 * still there is a memleak of 128 bytes...
509 */ 928 */
510STATIC void 929static void
511destroy_stacks(pTHX) 930coro_destruct_stacks (pTHX)
512{ 931{
513 /* is this ugly, I ask? */
514 while (PL_scopestack_ix)
515 LEAVE;
516
517 /* sure it is, but more important: is it correct?? :/ */
518 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519 FREETMPS;
520
521 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
523 934
524 while (PL_curstackinfo) 935 while (PL_curstackinfo)
525 { 936 {
526 PERL_SI *p = PL_curstackinfo->si_prev; 937 PERL_SI *p = PL_curstackinfo->si_prev;
527 938
528 { 939 if (!IN_DESTRUCT)
529 dSP;
530 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531 PUTBACK; /* possibly superfluous */
532 }
533
534 dounwind(-1);
535
536 SvREFCNT_dec(PL_curstackinfo->si_stack); 940 SvREFCNT_dec (PL_curstackinfo->si_stack);
941
537 Safefree(PL_curstackinfo->si_cxstack); 942 Safefree (PL_curstackinfo->si_cxstack);
538 Safefree(PL_curstackinfo); 943 Safefree (PL_curstackinfo);
539 PL_curstackinfo = p; 944 PL_curstackinfo = p;
540 } 945 }
541 946
542 Safefree(PL_tmps_stack); 947 Safefree (PL_tmps_stack);
543 Safefree(PL_markstack); 948 Safefree (PL_markstack);
544 Safefree(PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
545 Safefree(PL_savestack); 953 Safefree (PL_savestack);
954#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree(PL_retstack); 955 Safefree (PL_retstack);
547}
548
549static void
550allocate_stack (Coro__State ctx, int alloc)
551{
552 coro_stack *stack;
553
554 New (0, stack, 1, coro_stack);
555
556 stack->refcnt = 1;
557 stack->usecnt = 1;
558 stack->gencnt = ctx->gencnt = 0;
559 if (alloc)
560 {
561#ifdef HAVE_MMAP
562 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
564 if (stack->sptr == (void *)-1)
565#endif 956#endif
957}
958
959#define CORO_RSS \
960 rss += sizeof (SYM (curstackinfo)); \
961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
962 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
963 rss += SYM (tmps_max) * sizeof (SV *); \
964 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
965 rss += SYM (scopestack_max) * sizeof (I32); \
966 rss += SYM (savestack_max) * sizeof (ANY);
967
968static size_t
969coro_rss (pTHX_ struct coro *coro)
970{
971 size_t rss = sizeof (*coro);
972
973 if (coro->mainstack)
974 {
975 if (coro->flags & CF_RUNNING)
566 { 976 {
567 /*FIXME*//*D*//* reasonable stack size! */ 977 #define SYM(sym) PL_ ## sym
568 stack->ssize = -4096 * sizeof (long); 978 CORO_RSS;
569 New (0, stack->sptr, 4096, long); 979 #undef SYM
570 } 980 }
571 }
572 else 981 else
573 stack->sptr = 0;
574
575 ctx->stack = stack;
576}
577
578static void
579deallocate_stack (Coro__State ctx)
580{
581 coro_stack *stack = ctx->stack;
582
583 ctx->stack = 0;
584
585 if (stack)
586 {
587 if (!--stack->refcnt)
588 { 982 {
589#ifdef HAVE_MMAP 983 #define SYM(sym) coro->slot->sym
590 if (stack->ssize > 0 && stack->sptr) 984 CORO_RSS;
591 munmap (stack->sptr, stack->ssize); 985 #undef SYM
986 }
987 }
988
989 return rss;
990}
991
992/** coroutine stack handling ************************************************/
993
994static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
996static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
997
998/* apparently < 5.8.8 */
999#ifndef MgPV_nolen_const
1000#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1001 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1002 (const char*)(mg)->mg_ptr)
1003#endif
1004
1005/*
1006 * This overrides the default magic get method of %SIG elements.
1007 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1008 * and instead of trying to save and restore the hash elements (extremely slow),
1009 * we just provide our own readback here.
1010 */
1011static int ecb_cold
1012coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1013{
1014 const char *s = MgPV_nolen_const (mg);
1015
1016 if (*s == '_')
1017 {
1018 SV **svp = 0;
1019
1020 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1021 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1022
1023 if (svp)
1024 {
1025 SV *ssv;
1026
1027 if (!*svp)
1028 ssv = &PL_sv_undef;
1029 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1030 ssv = sv_2mortal (newRV_inc (*svp));
592 else 1031 else
593#else 1032 ssv = *svp;
594 Safefree (stack->sptr); 1033
595#endif 1034 sv_setsv (sv, ssv);
596 Safefree (stack); 1035 return 0;
597 } 1036 }
598 else if (ctx->gencnt == stack->gencnt) 1037 }
599 --stack->usecnt; 1038
1039 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1040}
1041
1042static int ecb_cold
1043coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1044{
1045 const char *s = MgPV_nolen_const (mg);
1046
1047 if (*s == '_')
600 } 1048 {
601} 1049 SV **svp = 0;
602 1050
1051 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1052 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1053
1054 if (svp)
1055 {
1056 SV *old = *svp;
1057 *svp = 0;
1058 SvREFCNT_dec (old);
1059 return 0;
1060 }
1061 }
1062
1063 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1064}
1065
1066static int ecb_cold
1067coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1068{
1069 const char *s = MgPV_nolen_const (mg);
1070
1071 if (*s == '_')
1072 {
1073 SV **svp = 0;
1074
1075 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1076 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1077
1078 if (svp)
1079 {
1080 SV *old = *svp;
1081 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1082 SvREFCNT_dec (old);
1083 return 0;
1084 }
1085 }
1086
1087 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1088}
1089
1090static void
1091prepare_nop (pTHX_ struct coro_transfer_args *ta)
1092{
1093 /* kind of mega-hacky, but works */
1094 ta->next = ta->prev = (struct coro *)ta;
1095}
1096
603static void 1097static int
604setup_coro (void *arg) 1098slf_check_nop (pTHX_ struct CoroSLF *frame)
1099{
1100 return 0;
1101}
1102
1103static int
1104slf_check_repeat (pTHX_ struct CoroSLF *frame)
1105{
1106 return 1;
1107}
1108
1109static UNOP init_perl_op;
1110
1111ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1112init_perl (pTHX_ struct coro *coro)
605{ 1113{
606 /* 1114 /*
607 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
608 */ 1116 */
1117 coro_init_stacks (aTHX);
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 PL_curcop = &PL_compiling;
1121 PL_in_eval = EVAL_NULL;
1122 PL_comppad = 0;
1123 PL_comppad_name = 0;
1124 PL_comppad_name_fill = 0;
1125 PL_comppad_name_floor = 0;
1126 PL_curpm = 0;
1127 PL_curpad = 0;
1128 PL_localizing = 0;
1129 PL_restartop = 0;
1130#if PERL_VERSION_ATLEAST (5,10,0)
1131 PL_parser = 0;
1132#endif
1133 PL_hints = 0;
1134
1135 /* recreate the die/warn hooks */
1136 PL_diehook = SvREFCNT_inc (rv_diehook);
1137 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1138
1139 GvSV (PL_defgv) = newSV (0);
1140 GvAV (PL_defgv) = coro->args; coro->args = 0;
1141 GvSV (PL_errgv) = newSV (0);
1142 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1143 GvHV (PL_hintgv) = 0;
1144 PL_rs = newSVsv (GvSV (irsgv));
1145 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1146
1147 {
1148 dSP;
1149 UNOP myop;
1150
1151 Zero (&myop, 1, UNOP);
1152 myop.op_next = Nullop;
1153 myop.op_type = OP_ENTERSUB;
1154 myop.op_flags = OPf_WANT_VOID;
1155
1156 PUSHMARK (SP);
1157 PUSHs ((SV *)coro->startcv);
1158 PUTBACK;
1159 PL_op = (OP *)&myop;
1160 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1161 }
1162
1163 /* this newly created coroutine might be run on an existing cctx which most
1164 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1165 */
1166 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1167 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1168 slf_frame.destroy = 0;
1169
1170 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1171 init_perl_op.op_next = PL_op;
1172 init_perl_op.op_type = OP_ENTERSUB;
1173 init_perl_op.op_ppaddr = pp_slf;
1174 /* no flags etc. required, as an init function won't be called */
1175
1176 PL_op = (OP *)&init_perl_op;
1177
1178 /* copy throw, in case it was set before init_perl */
1179 CORO_THROW = coro->except;
1180
1181 SWAP_SVS (coro);
1182
1183 if (ecb_expect_false (enable_times))
1184 {
1185 coro_times_update ();
1186 coro_times_sub (coro);
1187 }
1188}
1189
1190static void
1191coro_unwind_stacks (pTHX)
1192{
1193 if (!IN_DESTRUCT)
1194 {
1195 /* restore all saved variables and stuff */
1196 LEAVE_SCOPE (0);
1197 assert (PL_tmps_floor == -1);
1198
1199 /* free all temporaries */
1200 FREETMPS;
1201 assert (PL_tmps_ix == -1);
1202
1203 /* unwind all extra stacks */
1204 POPSTACK_TO (PL_mainstack);
1205
1206 /* unwind main stack */
1207 dounwind (-1);
1208 }
1209}
1210
1211static void
1212destroy_perl (pTHX_ struct coro *coro)
1213{
1214 SV *svf [9];
1215
1216 {
1217 SV *old_current = SvRV (coro_current);
1218 struct coro *current = SvSTATE (old_current);
1219
1220 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1221
1222 save_perl (aTHX_ current);
1223
1224 /* this will cause transfer_check to croak on block*/
1225 SvRV_set (coro_current, (SV *)coro->hv);
1226
1227 load_perl (aTHX_ coro);
1228
1229 coro_unwind_stacks (aTHX);
1230
1231 /* restore swapped sv's */
1232 SWAP_SVS (coro);
1233
1234 coro_destruct_stacks (aTHX);
1235
1236 /* now save some sv's to be free'd later */
1237 svf [0] = GvSV (PL_defgv);
1238 svf [1] = (SV *)GvAV (PL_defgv);
1239 svf [2] = GvSV (PL_errgv);
1240 svf [3] = (SV *)PL_defoutgv;
1241 svf [4] = PL_rs;
1242 svf [5] = GvSV (irsgv);
1243 svf [6] = (SV *)GvHV (PL_hintgv);
1244 svf [7] = PL_diehook;
1245 svf [8] = PL_warnhook;
1246 assert (9 == sizeof (svf) / sizeof (*svf));
1247
1248 SvRV_set (coro_current, old_current);
1249
1250 load_perl (aTHX_ current);
1251 }
1252
1253 {
1254 unsigned int i;
1255
1256 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1257 SvREFCNT_dec (svf [i]);
1258
1259 SvREFCNT_dec (coro->saved_deffh);
1260 SvREFCNT_dec (coro->rouse_cb);
1261 SvREFCNT_dec (coro->invoke_cb);
1262 SvREFCNT_dec (coro->invoke_av);
1263 }
1264}
1265
1266ecb_inline void
1267free_coro_mortal (pTHX)
1268{
1269 if (ecb_expect_true (coro_mortal))
1270 {
1271 SvREFCNT_dec ((SV *)coro_mortal);
1272 coro_mortal = 0;
1273 }
1274}
1275
1276static int
1277runops_trace (pTHX)
1278{
1279 COP *oldcop = 0;
1280 int oldcxix = -2;
1281
1282 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1283 {
1284 PERL_ASYNC_CHECK ();
1285
1286 if (cctx_current->flags & CC_TRACE_ALL)
1287 {
1288 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1289 {
1290 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1291 SV **bot, **top;
1292 AV *av = newAV (); /* return values */
1293 SV **cb;
1294 dSP;
1295
1296 GV *gv = CvGV (cx->blk_sub.cv);
1297 SV *fullname = sv_2mortal (newSV (0));
1298 if (isGV (gv))
1299 gv_efullname3 (fullname, gv, 0);
1300
1301 bot = PL_stack_base + cx->blk_oldsp + 1;
1302 top = cx->blk_gimme == G_ARRAY ? SP + 1
1303 : cx->blk_gimme == G_SCALAR ? bot + 1
1304 : bot;
1305
1306 av_extend (av, top - bot);
1307 while (bot < top)
1308 av_push (av, SvREFCNT_inc_NN (*bot++));
1309
1310 PL_runops = RUNOPS_DEFAULT;
1311 ENTER;
1312 SAVETMPS;
1313 EXTEND (SP, 3);
1314 PUSHMARK (SP);
1315 PUSHs (&PL_sv_no);
1316 PUSHs (fullname);
1317 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1318 PUTBACK;
1319 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1320 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1321 SPAGAIN;
1322 FREETMPS;
1323 LEAVE;
1324 PL_runops = runops_trace;
1325 }
1326
1327 if (oldcop != PL_curcop)
1328 {
1329 oldcop = PL_curcop;
1330
1331 if (PL_curcop != &PL_compiling)
1332 {
1333 SV **cb;
1334
1335 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1336 {
1337 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1338
1339 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1340 {
1341 dSP;
1342 GV *gv = CvGV (cx->blk_sub.cv);
1343 SV *fullname = sv_2mortal (newSV (0));
1344
1345 if (isGV (gv))
1346 gv_efullname3 (fullname, gv, 0);
1347
1348 PL_runops = RUNOPS_DEFAULT;
1349 ENTER;
1350 SAVETMPS;
1351 EXTEND (SP, 3);
1352 PUSHMARK (SP);
1353 PUSHs (&PL_sv_yes);
1354 PUSHs (fullname);
1355 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1356 PUTBACK;
1357 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1358 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1359 SPAGAIN;
1360 FREETMPS;
1361 LEAVE;
1362 PL_runops = runops_trace;
1363 }
1364
1365 oldcxix = cxstack_ix;
1366 }
1367
1368 if (cctx_current->flags & CC_TRACE_LINE)
1369 {
1370 dSP;
1371
1372 PL_runops = RUNOPS_DEFAULT;
1373 ENTER;
1374 SAVETMPS;
1375 EXTEND (SP, 3);
1376 PL_runops = RUNOPS_DEFAULT;
1377 PUSHMARK (SP);
1378 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1379 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1380 PUTBACK;
1381 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1382 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1383 SPAGAIN;
1384 FREETMPS;
1385 LEAVE;
1386 PL_runops = runops_trace;
1387 }
1388 }
1389 }
1390 }
1391 }
1392
1393 TAINT_NOT;
1394 return 0;
1395}
1396
1397static struct CoroSLF cctx_ssl_frame;
1398
1399static void
1400slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1401{
1402 ta->prev = 0;
1403}
1404
1405static int
1406slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1407{
1408 *frame = cctx_ssl_frame;
1409
1410 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1411}
1412
1413/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1414static void ecb_noinline
1415cctx_prepare (pTHX)
1416{
1417 PL_top_env = &PL_start_env;
1418
1419 if (cctx_current->flags & CC_TRACE)
1420 PL_runops = runops_trace;
1421
1422 /* we already must be executing an SLF op, there is no other valid way
1423 * that can lead to creation of a new cctx */
1424 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1425 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1426
1427 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1428 cctx_ssl_frame = slf_frame;
1429
1430 slf_frame.prepare = slf_prepare_set_stacklevel;
1431 slf_frame.check = slf_check_set_stacklevel;
1432}
1433
1434/* the tail of transfer: execute stuff we can only do after a transfer */
1435ecb_inline void
1436transfer_tail (pTHX)
1437{
1438 free_coro_mortal (aTHX);
1439}
1440
1441/* try to exit the same way perl's main function would do */
1442/* we do not bother resetting the environment or other things *7
1443/* that are not, uhm, essential */
1444/* this obviously also doesn't work when perl is embedded */
1445static void ecb_noinline ecb_cold
1446perlish_exit (pTHX)
1447{
1448 int exitstatus = perl_destruct (PL_curinterp);
1449 perl_free (PL_curinterp);
1450 exit (exitstatus);
1451}
1452
1453/*
1454 * this is a _very_ stripped down perl interpreter ;)
1455 */
1456static void
1457cctx_run (void *arg)
1458{
1459#ifdef USE_ITHREADS
1460# if CORO_PTHREAD
1461 PERL_SET_CONTEXT (coro_thx);
1462# endif
1463#endif
1464 {
1465 dTHX;
1466
1467 /* normally we would need to skip the entersub here */
1468 /* not doing so will re-execute it, which is exactly what we want */
1469 /* PL_nop = PL_nop->op_next */
1470
1471 /* inject a fake subroutine call to cctx_init */
1472 cctx_prepare (aTHX);
1473
1474 /* cctx_run is the alternative tail of transfer() */
1475 transfer_tail (aTHX);
1476
1477 /* somebody or something will hit me for both perl_run and PL_restartop */
1478 PL_restartop = PL_op;
1479 perl_run (PL_curinterp);
1480 /*
1481 * Unfortunately, there is no way to get at the return values of the
1482 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1483 * runtime errors here, as this is just a random interpreter, not a thread.
1484 */
1485
1486 /*
1487 * If perl-run returns we assume exit() was being called or the coro
1488 * fell off the end, which seems to be the only valid (non-bug)
1489 * reason for perl_run to return. We try to mimic whatever perl is normally
1490 * doing in that case. YMMV.
1491 */
1492 perlish_exit (aTHX);
1493 }
1494}
1495
1496static coro_cctx *
1497cctx_new (void)
1498{
1499 coro_cctx *cctx;
1500
1501 ++cctx_count;
1502 New (0, cctx, 1, coro_cctx);
1503
1504 cctx->gen = cctx_gen;
1505 cctx->flags = 0;
1506 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1507
1508 return cctx;
1509}
1510
1511/* create a new cctx only suitable as source */
1512static coro_cctx *
1513cctx_new_empty (void)
1514{
1515 coro_cctx *cctx = cctx_new ();
1516
1517 cctx->stack.sptr = 0;
1518 coro_create (&cctx->cctx, 0, 0, 0, 0);
1519
1520 return cctx;
1521}
1522
1523/* create a new cctx suitable as destination/running a perl interpreter */
1524static coro_cctx *
1525cctx_new_run (void)
1526{
1527 coro_cctx *cctx = cctx_new ();
1528
1529 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1530 {
1531 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1532 _exit (EXIT_FAILURE);
1533 }
1534
1535 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1536
1537 return cctx;
1538}
1539
1540static void
1541cctx_destroy (coro_cctx *cctx)
1542{
1543 if (!cctx)
1544 return;
1545
1546 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1547
1548 --cctx_count;
1549 coro_destroy (&cctx->cctx);
1550
1551 coro_stack_free (&cctx->stack);
1552
1553 Safefree (cctx);
1554}
1555
1556/* wether this cctx should be destructed */
1557#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1558
1559static coro_cctx *
1560cctx_get (pTHX)
1561{
1562 while (ecb_expect_true (cctx_first))
1563 {
1564 coro_cctx *cctx = cctx_first;
1565 cctx_first = cctx->next;
1566 --cctx_idle;
1567
1568 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1569 return cctx;
1570
1571 cctx_destroy (cctx);
1572 }
1573
1574 return cctx_new_run ();
1575}
1576
1577static void
1578cctx_put (coro_cctx *cctx)
1579{
1580 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1581
1582 /* free another cctx if overlimit */
1583 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1584 {
1585 coro_cctx *first = cctx_first;
1586 cctx_first = first->next;
1587 --cctx_idle;
1588
1589 cctx_destroy (first);
1590 }
1591
1592 ++cctx_idle;
1593 cctx->next = cctx_first;
1594 cctx_first = cctx;
1595}
1596
1597/** coroutine switching *****************************************************/
1598
1599static void
1600transfer_check (pTHX_ struct coro *prev, struct coro *next)
1601{
1602 /* TODO: throwing up here is considered harmful */
1603
1604 if (ecb_expect_true (prev != next))
1605 {
1606 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1607 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1608
1609 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1610 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1611
1612#if !PERL_VERSION_ATLEAST (5,10,0)
1613 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1614 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1615#endif
1616 }
1617}
1618
1619/* always use the TRANSFER macro */
1620static void ecb_noinline /* noinline so we have a fixed stackframe */
1621transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1622{
1623 dSTACKLEVEL;
1624
1625 /* sometimes transfer is only called to set idle_sp */
1626 if (ecb_expect_false (!prev))
1627 {
1628 cctx_current->idle_sp = STACKLEVEL;
1629 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1630 }
1631 else if (ecb_expect_true (prev != next))
1632 {
1633 coro_cctx *cctx_prev;
1634
1635 if (ecb_expect_false (prev->flags & CF_NEW))
1636 {
1637 /* create a new empty/source context */
1638 prev->flags &= ~CF_NEW;
1639 prev->flags |= CF_RUNNING;
1640 }
1641
1642 prev->flags &= ~CF_RUNNING;
1643 next->flags |= CF_RUNNING;
1644
1645 /* first get rid of the old state */
1646 save_perl (aTHX_ prev);
1647
1648 if (ecb_expect_false (next->flags & CF_NEW))
1649 {
1650 /* need to start coroutine */
1651 next->flags &= ~CF_NEW;
1652 /* setup coroutine call */
1653 init_perl (aTHX_ next);
1654 }
1655 else
1656 load_perl (aTHX_ next);
1657
1658 /* possibly untie and reuse the cctx */
1659 if (ecb_expect_true (
1660 cctx_current->idle_sp == STACKLEVEL
1661 && !(cctx_current->flags & CC_TRACE)
1662 && !force_cctx
1663 ))
1664 {
1665 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1666 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1667
1668 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1669 /* without this the next cctx_get might destroy the running cctx while still in use */
1670 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1671 if (ecb_expect_true (!next->cctx))
1672 next->cctx = cctx_get (aTHX);
1673
1674 cctx_put (cctx_current);
1675 }
1676 else
1677 prev->cctx = cctx_current;
1678
1679 ++next->usecount;
1680
1681 cctx_prev = cctx_current;
1682 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1683
1684 next->cctx = 0;
1685
1686 if (ecb_expect_false (cctx_prev != cctx_current))
1687 {
1688 cctx_prev->top_env = PL_top_env;
1689 PL_top_env = cctx_current->top_env;
1690 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1691 }
1692
1693 transfer_tail (aTHX);
1694 }
1695}
1696
1697#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1698#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1699
1700/** high level stuff ********************************************************/
1701
1702/* this function is actually Coro, not Coro::State, but we call it from here */
1703/* because it is convenient - but it hasn't been declared yet for that reason */
1704static void
1705coro_call_on_destroy (pTHX_ struct coro *coro);
1706
1707static void
1708coro_state_destroy (pTHX_ struct coro *coro)
1709{
1710 if (coro->flags & CF_ZOMBIE)
1711 return;
1712
1713 slf_destroy (aTHX_ coro);
1714
1715 coro->flags |= CF_ZOMBIE;
1716
1717 if (coro->flags & CF_READY)
1718 {
1719 /* reduce nready, as destroying a ready coro effectively unreadies it */
1720 /* alternative: look through all ready queues and remove the coro */
1721 --coro_nready;
1722 }
1723 else
1724 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1725
1726 if (coro->next) coro->next->prev = coro->prev;
1727 if (coro->prev) coro->prev->next = coro->next;
1728 if (coro == coro_first) coro_first = coro->next;
1729
1730 if (coro->mainstack
1731 && coro->mainstack != main_mainstack
1732 && coro->slot
1733 && !PL_dirty)
1734 destroy_perl (aTHX_ coro);
1735
1736 cctx_destroy (coro->cctx);
1737 SvREFCNT_dec (coro->startcv);
1738 SvREFCNT_dec (coro->args);
1739 SvREFCNT_dec (coro->swap_sv);
1740 SvREFCNT_dec (CORO_THROW);
1741
1742 coro_call_on_destroy (aTHX_ coro);
1743
1744 /* more destruction mayhem in coro_state_free */
1745}
1746
1747static int
1748coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 struct coro *coro = (struct coro *)mg->mg_ptr;
1751 mg->mg_ptr = 0;
1752
1753 coro_state_destroy (aTHX_ coro);
1754 SvREFCNT_dec (coro->on_destroy);
1755 SvREFCNT_dec (coro->status);
1756
1757 Safefree (coro);
1758
1759 return 0;
1760}
1761
1762static int ecb_cold
1763coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1764{
1765 /* called when perl clones the current process the slow way (windows process emulation) */
1766 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1767 mg->mg_ptr = 0;
1768 mg->mg_virtual = 0;
1769
1770 return 0;
1771}
1772
1773static MGVTBL coro_state_vtbl = {
1774 0, 0, 0, 0,
1775 coro_state_free,
1776 0,
1777#ifdef MGf_DUP
1778 coro_state_dup,
1779#else
1780# define MGf_DUP 0
1781#endif
1782};
1783
1784static void
1785prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1786{
1787 ta->prev = SvSTATE (prev_sv);
1788 ta->next = SvSTATE (next_sv);
1789 TRANSFER_CHECK (*ta);
1790}
1791
1792static void
1793api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1794{
1795 struct coro_transfer_args ta;
1796
1797 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1798 TRANSFER (ta, 1);
1799}
1800
1801/** Coro ********************************************************************/
1802
1803ecb_inline void
1804coro_enq (pTHX_ struct coro *coro)
1805{
1806 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1807
1808 SvREFCNT_inc_NN (coro->hv);
1809
1810 coro->next_ready = 0;
1811 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1812 ready [1] = coro;
1813}
1814
1815ecb_inline struct coro *
1816coro_deq (pTHX)
1817{
1818 int prio;
1819
1820 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1821 {
1822 struct coro **ready = coro_ready [prio];
1823
1824 if (ready [0])
1825 {
1826 struct coro *coro = ready [0];
1827 ready [0] = coro->next_ready;
1828 return coro;
1829 }
1830 }
1831
1832 return 0;
1833}
1834
1835static void
1836invoke_sv_ready_hook_helper (void)
1837{
1838 dTHX;
609 dSP; 1839 dSP;
610 Coro__State ctx = (Coro__State)arg;
611 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
612 1840
613 coro_init_stacks (aTHX); 1841 ENTER;
614 /*PL_curcop = 0;*/ 1842 SAVETMPS;
615 /*PL_in_eval = PL_in_eval;*/ /* inherit */
616 SvREFCNT_dec (GvAV (PL_defgv));
617 GvAV (PL_defgv) = ctx->args;
618 1843
619 SPAGAIN;
620
621 if (ctx->stack)
622 {
623 ctx->cursp = 0;
624
625 PUSHMARK(SP); 1844 PUSHMARK (SP);
626 PUTBACK; 1845 PUTBACK;
627 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1846 call_sv (coro_readyhook, G_VOID | G_DISCARD);
628 1847
629 if (SvTRUE (ERRSV)) 1848 FREETMPS;
630 croak (NULL); 1849 LEAVE;
631 else 1850}
632 croak ("FATAL: CCTXT coroutine returned!"); 1851
1852static int
1853api_ready (pTHX_ SV *coro_sv)
1854{
1855 struct coro *coro = SvSTATE (coro_sv);
1856
1857 if (coro->flags & CF_READY)
1858 return 0;
1859
1860 coro->flags |= CF_READY;
1861
1862 coro_enq (aTHX_ coro);
1863
1864 if (!coro_nready++)
1865 if (coroapi.readyhook)
1866 coroapi.readyhook ();
1867
1868 return 1;
1869}
1870
1871static int
1872api_is_ready (pTHX_ SV *coro_sv)
1873{
1874 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1875}
1876
1877/* expects to own a reference to next->hv */
1878ecb_inline void
1879prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1880{
1881 SV *prev_sv = SvRV (coro_current);
1882
1883 ta->prev = SvSTATE_hv (prev_sv);
1884 ta->next = next;
1885
1886 TRANSFER_CHECK (*ta);
1887
1888 SvRV_set (coro_current, (SV *)next->hv);
1889
1890 free_coro_mortal (aTHX);
1891 coro_mortal = prev_sv;
1892}
1893
1894static void
1895prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1896{
1897 for (;;)
633 } 1898 {
634 else 1899 struct coro *next = coro_deq (aTHX);
635 {
636 UNOP myop;
637 1900
638 PL_op = (OP *)&myop; 1901 if (ecb_expect_true (next))
639
640 Zero(&myop, 1, UNOP);
641 myop.op_next = Nullop;
642 myop.op_flags = OPf_WANT_VOID;
643
644 PUSHMARK(SP);
645 XPUSHs (sub_init);
646 /*
647 * the next line is slightly wrong, as PL_op->op_next
648 * is actually being executed so we skip the first op.
649 * that doesn't matter, though, since it is only
650 * pp_nextstate and we never return...
651 * ah yes, and I don't care anyways ;)
652 */
653 PUTBACK;
654 PL_op = pp_entersub();
655 SPAGAIN;
656
657 ENTER; /* necessary e.g. for dounwind */
658 }
659}
660
661static void
662continue_coro (void *arg)
663{
664 /*
665 * this is a _very_ stripped down perl interpreter ;)
666 */
667 Coro__State ctx = (Coro__State)arg;
668
669 /*FIXME*//* must set up top_env here */
670 ctx->cursp = 0;
671 PL_op = PL_op->op_next;
672 CALLRUNOPS(aTHX);
673
674 abort ();
675}
676
677STATIC void
678transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSP;
681 dSTACKLEVEL;
682
683 if (prev != next)
684 {
685 if (next->mainstack)
686 { 1902 {
687 SAVE (prev, flags); 1903 /* cannot transfer to destroyed coros, skip and look for next */
688 LOAD (next); 1904 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
689 1905 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
690 /* mark this state as in-use */ 1906 else
691 next->mainstack = 0;
692 next->tmps_ix = -2;
693
694 /* stacklevel changed? if yes, grab the stack for us! */
695 if (flags & TRANSFER_SAVE_CCTXT)
696 { 1907 {
697 if (!prev->stack) 1908 next->flags &= ~CF_READY;
698 allocate_stack (prev, 0); 1909 --coro_nready;
699 else if (prev->cursp != stacklevel 1910
700 && prev->stack->usecnt > 1) 1911 prepare_schedule_to (aTHX_ ta, next);
701 { 1912 break;
702 prev->gencnt = ++prev->stack->gencnt;
703 prev->stack->usecnt = 1;
704 }
705
706 /* has our stack been invalidated? */
707 if (next->stack && next->stack->gencnt != next->gencnt)
708 {
709 deallocate_stack (next);
710 allocate_stack (next, 1);
711 coro_create (&(next->stack->cctx),
712 continue_coro, (void *)next,
713 next->stack->sptr, labs (next->stack->ssize));
714 }
715
716 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
717 } 1913 }
718
719 } 1914 }
720 else if (next->tmps_ix == -2)
721 croak ("tried to transfer to running coroutine");
722 else 1915 else
723 { 1916 {
724 SAVE (prev, -1); /* first get rid of the old state */ 1917 /* nothing to schedule: call the idle handler */
725 1918 if (SvROK (sv_idle)
726 if (flags & TRANSFER_SAVE_CCTXT) 1919 && SvOBJECT (SvRV (sv_idle)))
727 { 1920 {
728 if (!prev->stack) 1921 if (SvRV (sv_idle) == SvRV (coro_current))
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 { 1922 {
733 setup_coro (next); 1923 require_pv ("Carp");
734 1924
735 prev->stack->refcnt++; 1925 {
736 prev->stack->usecnt++; 1926 dSP;
737 next->stack = prev->stack; 1927
738 next->gencnt = prev->gencnt; 1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1933 PUTBACK;
1934 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1935
1936 FREETMPS;
1937 LEAVE;
1938 }
739 } 1939 }
740 else 1940
741 { 1941 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
742 allocate_stack (next, 1); 1942 api_ready (aTHX_ SvRV (sv_idle));
743 coro_create (&(next->stack->cctx), 1943 --coro_nready;
744 setup_coro, (void *)next,
745 next->stack->sptr, labs (next->stack->ssize));
746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747 }
748 } 1944 }
749 else 1945 else
750 setup_coro (next); 1946 {
1947 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1948 dSP;
1949
1950 ENTER;
1951 SAVETMPS;
1952
1953 PUSHMARK (SP);
1954 PUTBACK;
1955 call_sv (sv_idle, G_VOID | G_DISCARD);
1956
1957 FREETMPS;
1958 LEAVE;
1959 }
751 } 1960 }
752 } 1961 }
753
754 next->cursp = stacklevel;
755} 1962}
756 1963
757static struct coro * 1964ecb_inline void
758sv_to_coro (SV *arg, const char *funcname, const char *varname) 1965prepare_cede (pTHX_ struct coro_transfer_args *ta)
759{ 1966{
760 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1967 api_ready (aTHX_ coro_current);
1968 prepare_schedule (aTHX_ ta);
1969}
1970
1971ecb_inline void
1972prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV *prev = SvRV (coro_current);
1975
1976 if (coro_nready)
761 { 1977 {
762 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1978 prepare_schedule (aTHX_ ta);
763 1979 api_ready (aTHX_ prev);
764 if (!he)
765 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
766
767 arg = HeVAL(he);
768 } 1980 }
769
770 /* must also be changed inside Coro::Cont::yield */
771 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
772 return (struct coro *) SvIV((SV*)SvRV(arg));
773 else 1981 else
774 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 1982 prepare_nop (aTHX_ ta);
775} 1983}
776 1984
1985static void
1986api_schedule (pTHX)
1987{
1988 struct coro_transfer_args ta;
1989
1990 prepare_schedule (aTHX_ &ta);
1991 TRANSFER (ta, 1);
1992}
1993
1994static void
1995api_schedule_to (pTHX_ SV *coro_sv)
1996{
1997 struct coro_transfer_args ta;
1998 struct coro *next = SvSTATE (coro_sv);
1999
2000 SvREFCNT_inc_NN (coro_sv);
2001 prepare_schedule_to (aTHX_ &ta, next);
2002}
2003
2004static int
2005api_cede (pTHX)
2006{
2007 struct coro_transfer_args ta;
2008
2009 prepare_cede (aTHX_ &ta);
2010
2011 if (ecb_expect_true (ta.prev != ta.next))
2012 {
2013 TRANSFER (ta, 1);
2014 return 1;
2015 }
2016 else
2017 return 0;
2018}
2019
2020static int
2021api_cede_notself (pTHX)
2022{
2023 if (coro_nready)
2024 {
2025 struct coro_transfer_args ta;
2026
2027 prepare_cede_notself (aTHX_ &ta);
2028 TRANSFER (ta, 1);
2029 return 1;
2030 }
2031 else
2032 return 0;
2033}
2034
2035static void
2036api_trace (pTHX_ SV *coro_sv, int flags)
2037{
2038 struct coro *coro = SvSTATE (coro_sv);
2039
2040 if (coro->flags & CF_RUNNING)
2041 croak ("cannot enable tracing on a running coroutine, caught");
2042
2043 if (flags & CC_TRACE)
2044 {
2045 if (!coro->cctx)
2046 coro->cctx = cctx_new_run ();
2047 else if (!(coro->cctx->flags & CC_TRACE))
2048 croak ("cannot enable tracing on coroutine with custom stack, caught");
2049
2050 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2051 }
2052 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2053 {
2054 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2055
2056 if (coro->flags & CF_RUNNING)
2057 PL_runops = RUNOPS_DEFAULT;
2058 else
2059 coro->slot->runops = RUNOPS_DEFAULT;
2060 }
2061}
2062
2063static void
2064coro_push_av (pTHX_ AV *av, I32 gimme_v)
2065{
2066 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2067 {
2068 dSP;
2069
2070 if (gimme_v == G_SCALAR)
2071 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2072 else
2073 {
2074 int i;
2075 EXTEND (SP, AvFILLp (av) + 1);
2076
2077 for (i = 0; i <= AvFILLp (av); ++i)
2078 PUSHs (AvARRAY (av)[i]);
2079 }
2080
2081 PUTBACK;
2082 }
2083}
2084
2085static void
2086coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2087{
2088 if (!coro->on_destroy)
2089 coro->on_destroy = newAV ();
2090
2091 av_push (coro->on_destroy, cb);
2092}
2093
2094static void
2095slf_destroy_join (pTHX_ struct CoroSLF *frame)
2096{
2097 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2098}
2099
2100static int
2101slf_check_join (pTHX_ struct CoroSLF *frame)
2102{
2103 struct coro *coro = (struct coro *)frame->data;
2104
2105 if (!coro->status)
2106 return 1;
2107
2108 frame->destroy = 0;
2109
2110 coro_push_av (aTHX_ coro->status, GIMME_V);
2111
2112 SvREFCNT_dec ((SV *)coro->hv);
2113
2114 return 0;
2115}
2116
2117static void
2118slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2121
2122 if (items > 1)
2123 croak ("join called with too many arguments");
2124
2125 if (coro->status)
2126 frame->prepare = prepare_nop;
2127 else
2128 {
2129 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2130 frame->prepare = prepare_schedule;
2131 }
2132
2133 frame->check = slf_check_join;
2134 frame->destroy = slf_destroy_join;
2135 frame->data = (void *)coro;
2136 SvREFCNT_inc (coro->hv);
2137}
2138
2139static void
2140coro_call_on_destroy (pTHX_ struct coro *coro)
2141{
2142 AV *od = coro->on_destroy;
2143
2144 if (!od)
2145 return;
2146
2147 coro->on_destroy = 0;
2148 sv_2mortal ((SV *)od);
2149
2150 while (AvFILLp (od) >= 0)
2151 {
2152 SV *cb = sv_2mortal (av_pop (od));
2153
2154 /* coro hv's (and only hv's at the moment) are supported as well */
2155 if (SvSTATEhv_p (aTHX_ cb))
2156 api_ready (aTHX_ cb);
2157 else
2158 {
2159 dSP; /* don't disturb outer sp */
2160 PUSHMARK (SP);
2161
2162 if (coro->status)
2163 {
2164 PUTBACK;
2165 coro_push_av (aTHX_ coro->status, G_ARRAY);
2166 SPAGAIN;
2167 }
2168
2169 PUTBACK;
2170 call_sv (cb, G_VOID | G_DISCARD);
2171 }
2172 }
2173}
2174
2175static void
2176coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2177{
2178 AV *av;
2179
2180 if (coro->status)
2181 {
2182 av = coro->status;
2183 av_clear (av);
2184 }
2185 else
2186 av = coro->status = newAV ();
2187
2188 /* items are actually not so common, so optimise for this case */
2189 if (items)
2190 {
2191 int i;
2192
2193 av_extend (av, items - 1);
2194
2195 for (i = 0; i < items; ++i)
2196 av_push (av, SvREFCNT_inc_NN (arg [i]));
2197 }
2198}
2199
2200static void
2201slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2202{
2203 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2204 api_ready (aTHX_ sv_manager);
2205
2206 frame->prepare = prepare_schedule;
2207 frame->check = slf_check_repeat;
2208
2209 /* as a minor optimisation, we could unwind all stacks here */
2210 /* but that puts extra pressure on pp_slf, and is not worth much */
2211 /*coro_unwind_stacks (aTHX);*/
2212}
2213
2214static void
2215slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 HV *coro_hv = (HV *)SvRV (coro_current);
2218
2219 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2220 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2221}
2222
2223static void
2224slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2225{
2226 HV *coro_hv;
2227 struct coro *coro;
2228
2229 if (items <= 0)
2230 croak ("Coro::cancel called without coro object,");
2231
2232 coro = SvSTATE (arg [0]);
2233 coro_hv = coro->hv;
2234
2235 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2236
2237 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2238 {
2239 /* coro currently busy cancelling something, so just notify it */
2240 coro->slf_frame.data = (void *)coro;
2241
2242 frame->prepare = prepare_nop;
2243 frame->check = slf_check_nop;
2244 }
2245 else if (coro_hv == (HV *)SvRV (coro_current))
2246 {
2247 /* cancelling the current coro is allowed, and equals terminate */
2248 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2249 }
2250 else
2251 {
2252 struct coro *self = SvSTATE_current;
2253
2254 /* otherwise we cancel directly, purely for speed reasons
2255 * unfortunately, this requires some magic trickery, as
2256 * somebody else could cancel us, so we have to fight the cancellation.
2257 * this is ugly, and hopefully fully worth the extra speed.
2258 * besides, I can't get the slow-but-safe version working...
2259 */
2260 slf_frame.data = 0;
2261 self->flags |= CF_NOCANCEL;
2262 coro_state_destroy (aTHX_ coro);
2263 self->flags &= ~CF_NOCANCEL;
2264
2265 if (slf_frame.data)
2266 {
2267 /* while we were busy we have been cancelled, so terminate */
2268 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2269 }
2270 else
2271 {
2272 frame->prepare = prepare_nop;
2273 frame->check = slf_check_nop;
2274 }
2275 }
2276}
2277
2278static int
2279slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2280{
2281 frame->prepare = 0;
2282 coro_unwind_stacks (aTHX);
2283
2284 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2285
2286 return 1;
2287}
2288
2289static int
2290safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2291{
2292 if (coro->cctx)
2293 croak ("coro inside C callback, unable to cancel at this time, caught");
2294
2295 if (coro->flags & CF_NEW)
2296 {
2297 coro_set_status (aTHX_ coro, arg, items);
2298 coro_state_destroy (aTHX_ coro);
2299 }
2300 else
2301 {
2302 if (!coro->slf_frame.prepare)
2303 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2304
2305 slf_destroy (aTHX_ coro);
2306
2307 coro_set_status (aTHX_ coro, arg, items);
2308 coro->slf_frame.prepare = prepare_nop;
2309 coro->slf_frame.check = slf_check_safe_cancel;
2310
2311 api_ready (aTHX_ (SV *)coro->hv);
2312 }
2313
2314 return 1;
2315}
2316
2317/*****************************************************************************/
2318/* async pool handler */
2319
2320static int
2321slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2322{
2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = (struct coro *)frame->data;
2325
2326 if (!coro->invoke_cb)
2327 return 1; /* loop till we have invoke */
2328 else
2329 {
2330 hv_store (hv, "desc", sizeof ("desc") - 1,
2331 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2332
2333 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2334
2335 {
2336 dSP;
2337 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2338 PUTBACK;
2339 }
2340
2341 SvREFCNT_dec (GvAV (PL_defgv));
2342 GvAV (PL_defgv) = coro->invoke_av;
2343 coro->invoke_av = 0;
2344
2345 return 0;
2346 }
2347}
2348
2349static void
2350slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 HV *hv = (HV *)SvRV (coro_current);
2353 struct coro *coro = SvSTATE_hv ((SV *)hv);
2354
2355 if (ecb_expect_true (coro->saved_deffh))
2356 {
2357 /* subsequent iteration */
2358 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2359 coro->saved_deffh = 0;
2360
2361 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2362 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2363 {
2364 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2365 return;
2366 }
2367 else
2368 {
2369 av_clear (GvAV (PL_defgv));
2370 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2371
2372 coro->prio = 0;
2373
2374 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2375 api_trace (aTHX_ coro_current, 0);
2376
2377 frame->prepare = prepare_schedule;
2378 av_push (av_async_pool, SvREFCNT_inc (hv));
2379 }
2380 }
2381 else
2382 {
2383 /* first iteration, simply fall through */
2384 frame->prepare = prepare_nop;
2385 }
2386
2387 frame->check = slf_check_pool_handler;
2388 frame->data = (void *)coro;
2389}
2390
2391/*****************************************************************************/
2392/* rouse callback */
2393
2394#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2395
2396static void
2397coro_rouse_callback (pTHX_ CV *cv)
2398{
2399 dXSARGS;
2400 SV *data = (SV *)S_GENSUB_ARG;
2401
2402 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2403 {
2404 /* first call, set args */
2405 SV *coro = SvRV (data);
2406 AV *av = newAV ();
2407
2408 SvRV_set (data, (SV *)av);
2409
2410 /* better take a full copy of the arguments */
2411 while (items--)
2412 av_store (av, items, newSVsv (ST (items)));
2413
2414 api_ready (aTHX_ coro);
2415 SvREFCNT_dec (coro);
2416 }
2417
2418 XSRETURN_EMPTY;
2419}
2420
2421static int
2422slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2423{
2424 SV *data = (SV *)frame->data;
2425
2426 if (CORO_THROW)
2427 return 0;
2428
2429 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2430 return 1;
2431
2432 /* now push all results on the stack */
2433 {
2434 dSP;
2435 AV *av = (AV *)SvRV (data);
2436 int i;
2437
2438 EXTEND (SP, AvFILLp (av) + 1);
2439 for (i = 0; i <= AvFILLp (av); ++i)
2440 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2441
2442 /* we have stolen the elements, so set length to zero and free */
2443 AvFILLp (av) = -1;
2444 av_undef (av);
2445
2446 PUTBACK;
2447 }
2448
2449 return 0;
2450}
2451
2452static void
2453slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2454{
2455 SV *cb;
2456
2457 if (items)
2458 cb = arg [0];
2459 else
2460 {
2461 struct coro *coro = SvSTATE_current;
2462
2463 if (!coro->rouse_cb)
2464 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2465
2466 cb = sv_2mortal (coro->rouse_cb);
2467 coro->rouse_cb = 0;
2468 }
2469
2470 if (!SvROK (cb)
2471 || SvTYPE (SvRV (cb)) != SVt_PVCV
2472 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2473 croak ("Coro::rouse_wait called with illegal callback argument,");
2474
2475 {
2476 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 frame->data = (void *)data;
2480 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2481 frame->check = slf_check_rouse_wait;
2482 }
2483}
2484
2485static SV *
2486coro_new_rouse_cb (pTHX)
2487{
2488 HV *hv = (HV *)SvRV (coro_current);
2489 struct coro *coro = SvSTATE_hv (hv);
2490 SV *data = newRV_inc ((SV *)hv);
2491 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2492
2493 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2494 SvREFCNT_dec (data); /* magicext increases the refcount */
2495
2496 SvREFCNT_dec (coro->rouse_cb);
2497 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2498
2499 return cb;
2500}
2501
2502/*****************************************************************************/
2503/* schedule-like-function opcode (SLF) */
2504
2505static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2506static const CV *slf_cv;
2507static SV **slf_argv;
2508static int slf_argc, slf_arga; /* count, allocated */
2509static I32 slf_ax; /* top of stack, for restore */
2510
2511/* this restores the stack in the case we patched the entersub, to */
2512/* recreate the stack frame as perl will on following calls */
2513/* since entersub cleared the stack */
2514static OP *
2515pp_restore (pTHX)
2516{
2517 int i;
2518 SV **SP = PL_stack_base + slf_ax;
2519
2520 PUSHMARK (SP);
2521
2522 EXTEND (SP, slf_argc + 1);
2523
2524 for (i = 0; i < slf_argc; ++i)
2525 PUSHs (sv_2mortal (slf_argv [i]));
2526
2527 PUSHs ((SV *)CvGV (slf_cv));
2528
2529 RETURNOP (slf_restore.op_first);
2530}
2531
2532static void
2533slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2534{
2535 SV **arg = (SV **)slf_frame.data;
2536
2537 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2538}
2539
2540static void
2541slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2542{
2543 if (items != 2)
2544 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2545
2546 frame->prepare = slf_prepare_transfer;
2547 frame->check = slf_check_nop;
2548 frame->data = (void *)arg; /* let's hope it will stay valid */
2549}
2550
2551static void
2552slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2553{
2554 frame->prepare = prepare_schedule;
2555 frame->check = slf_check_nop;
2556}
2557
2558static void
2559slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2560{
2561 struct coro *next = (struct coro *)slf_frame.data;
2562
2563 SvREFCNT_inc_NN (next->hv);
2564 prepare_schedule_to (aTHX_ ta, next);
2565}
2566
2567static void
2568slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2569{
2570 if (!items)
2571 croak ("Coro::schedule_to expects a coroutine argument, caught");
2572
2573 frame->data = (void *)SvSTATE (arg [0]);
2574 frame->prepare = slf_prepare_schedule_to;
2575 frame->check = slf_check_nop;
2576}
2577
2578static void
2579slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2580{
2581 api_ready (aTHX_ SvRV (coro_current));
2582
2583 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2584}
2585
2586static void
2587slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2588{
2589 frame->prepare = prepare_cede;
2590 frame->check = slf_check_nop;
2591}
2592
2593static void
2594slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2595{
2596 frame->prepare = prepare_cede_notself;
2597 frame->check = slf_check_nop;
2598}
2599
2600/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2601static void
2602slf_destroy (pTHX_ struct coro *coro)
2603{
2604 struct CoroSLF frame = coro->slf_frame;
2605
2606 /*
2607 * The on_destroy below most likely is from an SLF call.
2608 * Since by definition the SLF call will not finish when we destroy
2609 * the coro, we will have to force-finish it here, otherwise
2610 * cleanup functions cannot call SLF functions.
2611 */
2612 coro->slf_frame.prepare = 0;
2613 coro->slf_frame.destroy = 0;
2614
2615 /* this callback is reserved for slf functions needing to do cleanup */
2616 if (frame.destroy && frame.prepare && !PL_dirty)
2617 frame.destroy (aTHX_ &frame);
2618}
2619
2620/*
2621 * these not obviously related functions are all rolled into one
2622 * function to increase chances that they all will call transfer with the same
2623 * stack offset
2624 * SLF stands for "schedule-like-function".
2625 */
2626static OP *
2627pp_slf (pTHX)
2628{
2629 I32 checkmark; /* mark SP to see how many elements check has pushed */
2630
2631 /* set up the slf frame, unless it has already been set-up */
2632 /* the latter happens when a new coro has been started */
2633 /* or when a new cctx was attached to an existing coroutine */
2634 if (ecb_expect_true (!slf_frame.prepare))
2635 {
2636 /* first iteration */
2637 dSP;
2638 SV **arg = PL_stack_base + TOPMARK + 1;
2639 int items = SP - arg; /* args without function object */
2640 SV *gv = *sp;
2641
2642 /* do a quick consistency check on the "function" object, and if it isn't */
2643 /* for us, divert to the real entersub */
2644 if (SvTYPE (gv) != SVt_PVGV
2645 || !GvCV (gv)
2646 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2647 return PL_ppaddr[OP_ENTERSUB](aTHX);
2648
2649 if (!(PL_op->op_flags & OPf_STACKED))
2650 {
2651 /* ampersand-form of call, use @_ instead of stack */
2652 AV *av = GvAV (PL_defgv);
2653 arg = AvARRAY (av);
2654 items = AvFILLp (av) + 1;
2655 }
2656
2657 /* now call the init function, which needs to set up slf_frame */
2658 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2659 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2660
2661 /* pop args */
2662 SP = PL_stack_base + POPMARK;
2663
2664 PUTBACK;
2665 }
2666
2667 /* now that we have a slf_frame, interpret it! */
2668 /* we use a callback system not to make the code needlessly */
2669 /* complicated, but so we can run multiple perl coros from one cctx */
2670
2671 do
2672 {
2673 struct coro_transfer_args ta;
2674
2675 slf_frame.prepare (aTHX_ &ta);
2676 TRANSFER (ta, 0);
2677
2678 checkmark = PL_stack_sp - PL_stack_base;
2679 }
2680 while (slf_frame.check (aTHX_ &slf_frame));
2681
2682 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2683
2684 /* exception handling */
2685 if (ecb_expect_false (CORO_THROW))
2686 {
2687 SV *exception = sv_2mortal (CORO_THROW);
2688
2689 CORO_THROW = 0;
2690 sv_setsv (ERRSV, exception);
2691 croak (0);
2692 }
2693
2694 /* return value handling - mostly like entersub */
2695 /* make sure we put something on the stack in scalar context */
2696 if (GIMME_V == G_SCALAR
2697 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2698 {
2699 dSP;
2700 SV **bot = PL_stack_base + checkmark;
2701
2702 if (sp == bot) /* too few, push undef */
2703 bot [1] = &PL_sv_undef;
2704 else /* too many, take last one */
2705 bot [1] = *sp;
2706
2707 SP = bot + 1;
2708
2709 PUTBACK;
2710 }
2711
2712 return NORMAL;
2713}
2714
2715static void
2716api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2717{
2718 int i;
2719 SV **arg = PL_stack_base + ax;
2720 int items = PL_stack_sp - arg + 1;
2721
2722 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2723
2724 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2725 && PL_op->op_ppaddr != pp_slf)
2726 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2727
2728 CvFLAGS (cv) |= CVf_SLF;
2729 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2730 slf_cv = cv;
2731
2732 /* we patch the op, and then re-run the whole call */
2733 /* we have to put the same argument on the stack for this to work */
2734 /* and this will be done by pp_restore */
2735 slf_restore.op_next = (OP *)&slf_restore;
2736 slf_restore.op_type = OP_CUSTOM;
2737 slf_restore.op_ppaddr = pp_restore;
2738 slf_restore.op_first = PL_op;
2739
2740 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2741
2742 if (PL_op->op_flags & OPf_STACKED)
2743 {
2744 if (items > slf_arga)
2745 {
2746 slf_arga = items;
2747 Safefree (slf_argv);
2748 New (0, slf_argv, slf_arga, SV *);
2749 }
2750
2751 slf_argc = items;
2752
2753 for (i = 0; i < items; ++i)
2754 slf_argv [i] = SvREFCNT_inc (arg [i]);
2755 }
2756 else
2757 slf_argc = 0;
2758
2759 PL_op->op_ppaddr = pp_slf;
2760 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2761
2762 PL_op = (OP *)&slf_restore;
2763}
2764
2765/*****************************************************************************/
2766/* dynamic wind */
2767
2768static void
2769on_enterleave_call (pTHX_ SV *cb)
2770{
2771 dSP;
2772
2773 PUSHSTACK;
2774
2775 PUSHMARK (SP);
2776 PUTBACK;
2777 call_sv (cb, G_VOID | G_DISCARD);
2778 SPAGAIN;
2779
2780 POPSTACK;
2781}
2782
2783static SV *
2784coro_avp_pop_and_free (pTHX_ AV **avp)
2785{
2786 AV *av = *avp;
2787 SV *res = av_pop (av);
2788
2789 if (AvFILLp (av) < 0)
2790 {
2791 *avp = 0;
2792 SvREFCNT_dec (av);
2793 }
2794
2795 return res;
2796}
2797
2798static void
2799coro_pop_on_enter (pTHX_ void *coro)
2800{
2801 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2802 SvREFCNT_dec (cb);
2803}
2804
2805static void
2806coro_pop_on_leave (pTHX_ void *coro)
2807{
2808 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2809 on_enterleave_call (aTHX_ sv_2mortal (cb));
2810}
2811
2812/*****************************************************************************/
2813/* PerlIO::cede */
2814
2815typedef struct
2816{
2817 PerlIOBuf base;
2818 NV next, every;
2819} PerlIOCede;
2820
2821static IV ecb_cold
2822PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2823{
2824 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2825
2826 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2827 self->next = nvtime () + self->every;
2828
2829 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2830}
2831
2832static SV * ecb_cold
2833PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2834{
2835 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2836
2837 return newSVnv (self->every);
2838}
2839
2840static IV
2841PerlIOCede_flush (pTHX_ PerlIO *f)
2842{
2843 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2844 double now = nvtime ();
2845
2846 if (now >= self->next)
2847 {
2848 api_cede (aTHX);
2849 self->next = now + self->every;
2850 }
2851
2852 return PerlIOBuf_flush (aTHX_ f);
2853}
2854
2855static PerlIO_funcs PerlIO_cede =
2856{
2857 sizeof(PerlIO_funcs),
2858 "cede",
2859 sizeof(PerlIOCede),
2860 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2861 PerlIOCede_pushed,
2862 PerlIOBuf_popped,
2863 PerlIOBuf_open,
2864 PerlIOBase_binmode,
2865 PerlIOCede_getarg,
2866 PerlIOBase_fileno,
2867 PerlIOBuf_dup,
2868 PerlIOBuf_read,
2869 PerlIOBuf_unread,
2870 PerlIOBuf_write,
2871 PerlIOBuf_seek,
2872 PerlIOBuf_tell,
2873 PerlIOBuf_close,
2874 PerlIOCede_flush,
2875 PerlIOBuf_fill,
2876 PerlIOBase_eof,
2877 PerlIOBase_error,
2878 PerlIOBase_clearerr,
2879 PerlIOBase_setlinebuf,
2880 PerlIOBuf_get_base,
2881 PerlIOBuf_bufsiz,
2882 PerlIOBuf_get_ptr,
2883 PerlIOBuf_get_cnt,
2884 PerlIOBuf_set_ptrcnt,
2885};
2886
2887/*****************************************************************************/
2888/* Coro::Semaphore & Coro::Signal */
2889
2890static SV *
2891coro_waitarray_new (pTHX_ int count)
2892{
2893 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2894 AV *av = newAV ();
2895 SV **ary;
2896
2897 /* unfortunately, building manually saves memory */
2898 Newx (ary, 2, SV *);
2899 AvALLOC (av) = ary;
2900#if PERL_VERSION_ATLEAST (5,10,0)
2901 AvARRAY (av) = ary;
2902#else
2903 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2904 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2905 SvPVX ((SV *)av) = (char *)ary;
2906#endif
2907 AvMAX (av) = 1;
2908 AvFILLp (av) = 0;
2909 ary [0] = newSViv (count);
2910
2911 return newRV_noinc ((SV *)av);
2912}
2913
2914/* semaphore */
2915
2916static void
2917coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2918{
2919 SV *count_sv = AvARRAY (av)[0];
2920 IV count = SvIVX (count_sv);
2921
2922 count += adjust;
2923 SvIVX (count_sv) = count;
2924
2925 /* now wake up as many waiters as are expected to lock */
2926 while (count > 0 && AvFILLp (av) > 0)
2927 {
2928 SV *cb;
2929
2930 /* swap first two elements so we can shift a waiter */
2931 AvARRAY (av)[0] = AvARRAY (av)[1];
2932 AvARRAY (av)[1] = count_sv;
2933 cb = av_shift (av);
2934
2935 if (SvOBJECT (cb))
2936 {
2937 api_ready (aTHX_ cb);
2938 --count;
2939 }
2940 else if (SvTYPE (cb) == SVt_PVCV)
2941 {
2942 dSP;
2943 PUSHMARK (SP);
2944 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2945 PUTBACK;
2946 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2947 }
2948
2949 SvREFCNT_dec (cb);
2950 }
2951}
2952
2953static void
2954coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2955{
2956 /* call $sem->adjust (0) to possibly wake up some other waiters */
2957 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2958}
2959
2960static int
2961slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2962{
2963 AV *av = (AV *)frame->data;
2964 SV *count_sv = AvARRAY (av)[0];
2965 SV *coro_hv = SvRV (coro_current);
2966
2967 /* if we are about to throw, don't actually acquire the lock, just throw */
2968 if (CORO_THROW)
2969 return 0;
2970 else if (SvIVX (count_sv) > 0)
2971 {
2972 frame->destroy = 0;
2973
2974 if (acquire)
2975 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2976 else
2977 coro_semaphore_adjust (aTHX_ av, 0);
2978
2979 return 0;
2980 }
2981 else
2982 {
2983 int i;
2984 /* if we were woken up but can't down, we look through the whole */
2985 /* waiters list and only add us if we aren't in there already */
2986 /* this avoids some degenerate memory usage cases */
2987 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2988 if (AvARRAY (av)[i] == coro_hv)
2989 return 1;
2990
2991 av_push (av, SvREFCNT_inc (coro_hv));
2992 return 1;
2993 }
2994}
2995
2996static int
2997slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2998{
2999 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3000}
3001
3002static int
3003slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3004{
3005 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3006}
3007
3008static void
3009slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3010{
3011 AV *av = (AV *)SvRV (arg [0]);
3012
3013 if (SvIVX (AvARRAY (av)[0]) > 0)
3014 {
3015 frame->data = (void *)av;
3016 frame->prepare = prepare_nop;
3017 }
3018 else
3019 {
3020 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3021
3022 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3023 frame->prepare = prepare_schedule;
3024 /* to avoid race conditions when a woken-up coro gets terminated */
3025 /* we arrange for a temporary on_destroy that calls adjust (0) */
3026 frame->destroy = coro_semaphore_destroy;
3027 }
3028}
3029
3030static void
3031slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3032{
3033 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3034 frame->check = slf_check_semaphore_down;
3035}
3036
3037static void
3038slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3039{
3040 if (items >= 2)
3041 {
3042 /* callback form */
3043 AV *av = (AV *)SvRV (arg [0]);
3044 SV *cb_cv = s_get_cv_croak (arg [1]);
3045
3046 av_push (av, SvREFCNT_inc_NN (cb_cv));
3047
3048 if (SvIVX (AvARRAY (av)[0]) > 0)
3049 coro_semaphore_adjust (aTHX_ av, 0);
3050
3051 frame->prepare = prepare_nop;
3052 frame->check = slf_check_nop;
3053 }
3054 else
3055 {
3056 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3057 frame->check = slf_check_semaphore_wait;
3058 }
3059}
3060
3061/* signal */
3062
3063static void
3064coro_signal_wake (pTHX_ AV *av, int count)
3065{
3066 SvIVX (AvARRAY (av)[0]) = 0;
3067
3068 /* now signal count waiters */
3069 while (count > 0 && AvFILLp (av) > 0)
3070 {
3071 SV *cb;
3072
3073 /* swap first two elements so we can shift a waiter */
3074 cb = AvARRAY (av)[0];
3075 AvARRAY (av)[0] = AvARRAY (av)[1];
3076 AvARRAY (av)[1] = cb;
3077
3078 cb = av_shift (av);
3079
3080 if (SvTYPE (cb) == SVt_PVCV)
3081 {
3082 dSP;
3083 PUSHMARK (SP);
3084 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3085 PUTBACK;
3086 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3087 }
3088 else
3089 {
3090 api_ready (aTHX_ cb);
3091 sv_setiv (cb, 0); /* signal waiter */
3092 }
3093
3094 SvREFCNT_dec (cb);
3095
3096 --count;
3097 }
3098}
3099
3100static int
3101slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3102{
3103 /* if we are about to throw, also stop waiting */
3104 return SvROK ((SV *)frame->data) && !CORO_THROW;
3105}
3106
3107static void
3108slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3109{
3110 AV *av = (AV *)SvRV (arg [0]);
3111
3112 if (items >= 2)
3113 {
3114 SV *cb_cv = s_get_cv_croak (arg [1]);
3115 av_push (av, SvREFCNT_inc_NN (cb_cv));
3116
3117 if (SvIVX (AvARRAY (av)[0]))
3118 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3119
3120 frame->prepare = prepare_nop;
3121 frame->check = slf_check_nop;
3122 }
3123 else if (SvIVX (AvARRAY (av)[0]))
3124 {
3125 SvIVX (AvARRAY (av)[0]) = 0;
3126 frame->prepare = prepare_nop;
3127 frame->check = slf_check_nop;
3128 }
3129 else
3130 {
3131 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3132
3133 av_push (av, waiter);
3134
3135 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3136 frame->prepare = prepare_schedule;
3137 frame->check = slf_check_signal_wait;
3138 }
3139}
3140
3141/*****************************************************************************/
3142/* Coro::AIO */
3143
3144#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3145
3146/* helper storage struct */
3147struct io_state
3148{
3149 int errorno;
3150 I32 laststype; /* U16 in 5.10.0 */
3151 int laststatval;
3152 Stat_t statcache;
3153};
3154
3155static void
3156coro_aio_callback (pTHX_ CV *cv)
3157{
3158 dXSARGS;
3159 AV *state = (AV *)S_GENSUB_ARG;
3160 SV *coro = av_pop (state);
3161 SV *data_sv = newSV (sizeof (struct io_state));
3162
3163 av_extend (state, items - 1);
3164
3165 sv_upgrade (data_sv, SVt_PV);
3166 SvCUR_set (data_sv, sizeof (struct io_state));
3167 SvPOK_only (data_sv);
3168
3169 {
3170 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3171
3172 data->errorno = errno;
3173 data->laststype = PL_laststype;
3174 data->laststatval = PL_laststatval;
3175 data->statcache = PL_statcache;
3176 }
3177
3178 /* now build the result vector out of all the parameters and the data_sv */
3179 {
3180 int i;
3181
3182 for (i = 0; i < items; ++i)
3183 av_push (state, SvREFCNT_inc_NN (ST (i)));
3184 }
3185
3186 av_push (state, data_sv);
3187
3188 api_ready (aTHX_ coro);
3189 SvREFCNT_dec (coro);
3190 SvREFCNT_dec ((AV *)state);
3191}
3192
3193static int
3194slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3195{
3196 AV *state = (AV *)frame->data;
3197
3198 /* if we are about to throw, return early */
3199 /* this does not cancel the aio request, but at least */
3200 /* it quickly returns */
3201 if (CORO_THROW)
3202 return 0;
3203
3204 /* one element that is an RV? repeat! */
3205 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3206 return 1;
3207
3208 /* restore status */
3209 {
3210 SV *data_sv = av_pop (state);
3211 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3212
3213 errno = data->errorno;
3214 PL_laststype = data->laststype;
3215 PL_laststatval = data->laststatval;
3216 PL_statcache = data->statcache;
3217
3218 SvREFCNT_dec (data_sv);
3219 }
3220
3221 /* push result values */
3222 {
3223 dSP;
3224 int i;
3225
3226 EXTEND (SP, AvFILLp (state) + 1);
3227 for (i = 0; i <= AvFILLp (state); ++i)
3228 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3229
3230 PUTBACK;
3231 }
3232
3233 return 0;
3234}
3235
3236static void
3237slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3238{
3239 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3240 SV *coro_hv = SvRV (coro_current);
3241 struct coro *coro = SvSTATE_hv (coro_hv);
3242
3243 /* put our coroutine id on the state arg */
3244 av_push (state, SvREFCNT_inc_NN (coro_hv));
3245
3246 /* first see whether we have a non-zero priority and set it as AIO prio */
3247 if (coro->prio)
3248 {
3249 dSP;
3250
3251 static SV *prio_cv;
3252 static SV *prio_sv;
3253
3254 if (ecb_expect_false (!prio_cv))
3255 {
3256 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3257 prio_sv = newSViv (0);
3258 }
3259
3260 PUSHMARK (SP);
3261 sv_setiv (prio_sv, coro->prio);
3262 XPUSHs (prio_sv);
3263
3264 PUTBACK;
3265 call_sv (prio_cv, G_VOID | G_DISCARD);
3266 }
3267
3268 /* now call the original request */
3269 {
3270 dSP;
3271 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3272 int i;
3273
3274 PUSHMARK (SP);
3275
3276 /* first push all args to the stack */
3277 EXTEND (SP, items + 1);
3278
3279 for (i = 0; i < items; ++i)
3280 PUSHs (arg [i]);
3281
3282 /* now push the callback closure */
3283 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3284
3285 /* now call the AIO function - we assume our request is uncancelable */
3286 PUTBACK;
3287 call_sv ((SV *)req, G_VOID | G_DISCARD);
3288 }
3289
3290 /* now that the request is going, we loop till we have a result */
3291 frame->data = (void *)state;
3292 frame->prepare = prepare_schedule;
3293 frame->check = slf_check_aio_req;
3294}
3295
3296static void
3297coro_aio_req_xs (pTHX_ CV *cv)
3298{
3299 dXSARGS;
3300
3301 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3302
3303 XSRETURN_EMPTY;
3304}
3305
3306/*****************************************************************************/
3307
3308#if CORO_CLONE
3309# include "clone.c"
3310#endif
3311
3312/*****************************************************************************/
3313
3314static SV *
3315coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3316{
3317 SV *coro_sv;
3318 struct coro *coro;
3319 MAGIC *mg;
3320 HV *hv;
3321 SV *cb;
3322 int i;
3323
3324 if (argc > 0)
3325 {
3326 cb = s_get_cv_croak (argv [0]);
3327
3328 if (!is_coro)
3329 {
3330 if (CvISXSUB (cb))
3331 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3332
3333 if (!CvROOT (cb))
3334 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3335 }
3336 }
3337
3338 Newz (0, coro, 1, struct coro);
3339 coro->args = newAV ();
3340 coro->flags = CF_NEW;
3341
3342 if (coro_first) coro_first->prev = coro;
3343 coro->next = coro_first;
3344 coro_first = coro;
3345
3346 coro->hv = hv = newHV ();
3347 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3348 mg->mg_flags |= MGf_DUP;
3349 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3350
3351 if (argc > 0)
3352 {
3353 av_extend (coro->args, argc + is_coro - 1);
3354
3355 if (is_coro)
3356 {
3357 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3358 cb = (SV *)cv_coro_run;
3359 }
3360
3361 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3362
3363 for (i = 1; i < argc; i++)
3364 av_push (coro->args, newSVsv (argv [i]));
3365 }
3366
3367 return coro_sv;
3368}
3369
3370#ifndef __cplusplus
3371ecb_cold XS(boot_Coro__State);
3372#endif
3373
3374#if CORO_JIT
3375
3376static void ecb_noinline ecb_cold
3377pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3378{
3379 dSP;
3380 AV *av = newAV ();
3381
3382 av_store (av, 3, newSVuv (d));
3383 av_store (av, 2, newSVuv (c));
3384 av_store (av, 1, newSVuv (b));
3385 av_store (av, 0, newSVuv (a));
3386
3387 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3388
3389 PUTBACK;
3390}
3391
3392static void ecb_noinline ecb_cold
3393jit_init (pTHX)
3394{
3395 dSP;
3396 SV *load, *save;
3397 char *map_base;
3398 char *load_ptr, *save_ptr;
3399 STRLEN load_len, save_len, map_len;
3400 int count;
3401
3402 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3403
3404 PUSHMARK (SP);
3405 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3406 #include "state.h"
3407 count = call_pv ("Coro::State::_jit", G_ARRAY);
3408 SPAGAIN;
3409
3410 save = POPs; save_ptr = SvPVbyte (save, save_len);
3411 load = POPs; load_ptr = SvPVbyte (load, load_len);
3412
3413 map_len = load_len + save_len + 16;
3414
3415 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3416
3417 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3418
3419 load_perl_slots = (load_save_perl_slots_type)map_base;
3420 memcpy (map_base, load_ptr, load_len);
3421
3422 map_base += (load_len + 15) & ~15;
3423
3424 save_perl_slots = (load_save_perl_slots_type)map_base;
3425 memcpy (map_base, save_ptr, save_len);
3426
3427 /* we are good citizens and try to make the page read-only, so the evil evil */
3428 /* hackers might have it a bit more difficult */
3429 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3430
3431 PUTBACK;
3432 eval_pv ("undef &Coro::State::_jit", 1);
3433}
3434
3435#endif
3436
777MODULE = Coro::State PACKAGE = Coro::State 3437MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
778 3438
779PROTOTYPES: ENABLE 3439PROTOTYPES: DISABLE
780 3440
781BOOT: 3441BOOT:
782{ /* {} necessary for stoopid perl-5.6.x */ 3442{
783 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3443#ifdef USE_ITHREADS
784 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3444# if CORO_PTHREAD
3445 coro_thx = PERL_GET_CONTEXT;
3446# endif
3447#endif
3448 /* perl defines these to check for existance first, but why it doesn't */
3449 /* just create them one at init time is not clear to me, except for */
3450 /* programs trying to delete them, but... */
3451 /* anyway, we declare this as invalid and make sure they are initialised here */
3452 DEFSV;
3453 ERRSV;
3454
3455 cctx_current = cctx_new_empty ();
3456
3457 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3458 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3459
3460 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3461 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3462 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3463
3464 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3465 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3466 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3467
785 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3468 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786 3469
787 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3470 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
788 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3471 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
789 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3472 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
790 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3473 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
791
792 if (!padlist_cache)
793 padlist_cache = newHV ();
794 3474
795 main_mainstack = PL_mainstack; 3475 main_mainstack = PL_mainstack;
796} 3476 main_top_env = PL_top_env;
797 3477
798Coro::State 3478 while (main_top_env->je_prev)
799_newprocess(args) 3479 main_top_env = main_top_env->je_prev;
800 SV * args 3480
3481 {
3482 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3483
3484 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3485 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3486
3487 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3488 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3489 }
3490
3491 coroapi.ver = CORO_API_VERSION;
3492 coroapi.rev = CORO_API_REVISION;
3493
3494 coroapi.transfer = api_transfer;
3495
3496 coroapi.sv_state = SvSTATE_;
3497 coroapi.execute_slf = api_execute_slf;
3498 coroapi.prepare_nop = prepare_nop;
3499 coroapi.prepare_schedule = prepare_schedule;
3500 coroapi.prepare_cede = prepare_cede;
3501 coroapi.prepare_cede_notself = prepare_cede_notself;
3502
3503 time_init (aTHX);
3504
3505 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3506#if CORO_JIT
3507 PUTBACK;
3508 jit_init (aTHX);
3509 SPAGAIN;
3510#endif
3511}
3512
3513SV *
3514new (SV *klass, ...)
3515 ALIAS:
3516 Coro::new = 1
3517 CODE:
3518 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3519 OUTPUT:
3520 RETVAL
3521
3522void
3523transfer (...)
3524 PROTOTYPE: $$
3525 CODE:
3526 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3527
3528SV *
3529clone (Coro::State coro)
3530 CODE:
3531{
3532#if CORO_CLONE
3533 struct coro *ncoro = coro_clone (aTHX_ coro);
3534 MAGIC *mg;
3535 /* TODO: too much duplication */
3536 ncoro->hv = newHV ();
3537 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3538 mg->mg_flags |= MGf_DUP;
3539 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3540#else
3541 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3542#endif
3543}
3544 OUTPUT:
3545 RETVAL
3546
3547int
3548cctx_stacksize (int new_stacksize = 0)
3549 PROTOTYPE: ;$
3550 CODE:
3551 RETVAL = cctx_stacksize;
3552 if (new_stacksize)
3553 {
3554 cctx_stacksize = new_stacksize;
3555 ++cctx_gen;
3556 }
3557 OUTPUT:
3558 RETVAL
3559
3560int
3561cctx_max_idle (int max_idle = 0)
3562 PROTOTYPE: ;$
3563 CODE:
3564 RETVAL = cctx_max_idle;
3565 if (max_idle > 1)
3566 cctx_max_idle = max_idle;
3567 OUTPUT:
3568 RETVAL
3569
3570int
3571cctx_count ()
3572 PROTOTYPE:
3573 CODE:
3574 RETVAL = cctx_count;
3575 OUTPUT:
3576 RETVAL
3577
3578int
3579cctx_idle ()
3580 PROTOTYPE:
3581 CODE:
3582 RETVAL = cctx_idle;
3583 OUTPUT:
3584 RETVAL
3585
3586void
3587list ()
3588 PROTOTYPE:
3589 PPCODE:
3590{
3591 struct coro *coro;
3592 for (coro = coro_first; coro; coro = coro->next)
3593 if (coro->hv)
3594 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3595}
3596
3597void
3598call (Coro::State coro, SV *coderef)
3599 ALIAS:
3600 eval = 1
3601 CODE:
3602{
3603 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3604 {
3605 struct coro *current = SvSTATE_current;
3606 struct CoroSLF slf_save;
3607
3608 if (current != coro)
3609 {
3610 PUTBACK;
3611 save_perl (aTHX_ current);
3612 load_perl (aTHX_ coro);
3613 /* the coro is most likely in an active SLF call.
3614 * while not strictly required (the code we execute is
3615 * not allowed to call any SLF functions), it's cleaner
3616 * to reinitialise the slf_frame and restore it later.
3617 * This might one day allow us to actually do SLF calls
3618 * from code executed here.
3619 */
3620 slf_save = slf_frame;
3621 slf_frame.prepare = 0;
3622 SPAGAIN;
3623 }
3624
3625 PUSHSTACK;
3626
3627 PUSHMARK (SP);
3628 PUTBACK;
3629
3630 if (ix)
3631 eval_sv (coderef, 0);
3632 else
3633 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3634
3635 POPSTACK;
3636 SPAGAIN;
3637
3638 if (current != coro)
3639 {
3640 PUTBACK;
3641 slf_frame = slf_save;
3642 save_perl (aTHX_ coro);
3643 load_perl (aTHX_ current);
3644 SPAGAIN;
3645 }
3646 }
3647}
3648
3649SV *
3650is_ready (Coro::State coro)
801 PROTOTYPE: $ 3651 PROTOTYPE: $
3652 ALIAS:
3653 is_ready = CF_READY
3654 is_running = CF_RUNNING
3655 is_new = CF_NEW
3656 is_destroyed = CF_ZOMBIE
3657 is_zombie = CF_ZOMBIE
3658 is_suspended = CF_SUSPENDED
3659 CODE:
3660 RETVAL = boolSV (coro->flags & ix);
3661 OUTPUT:
3662 RETVAL
3663
3664void
3665throw (SV *self, SV *exception = &PL_sv_undef)
3666 PROTOTYPE: $;$
802 CODE: 3667 CODE:
803 Coro__State coro; 3668{
3669 struct coro *coro = SvSTATE (self);
3670 struct coro *current = SvSTATE_current;
3671 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3672 SvREFCNT_dec (*exceptionp);
3673 SvGETMAGIC (exception);
3674 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
804 3675
805 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3676 api_ready (aTHX_ self);
806 croak ("Coro::State::_newprocess expects an arrayref"); 3677}
3678
3679void
3680api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3681 PROTOTYPE: $;$
3682 C_ARGS: aTHX_ coro, flags
3683
3684SV *
3685has_cctx (Coro::State coro)
3686 PROTOTYPE: $
3687 CODE:
3688 /* maybe manage the running flag differently */
3689 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3690 OUTPUT:
3691 RETVAL
3692
3693int
3694is_traced (Coro::State coro)
3695 PROTOTYPE: $
3696 CODE:
3697 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3698 OUTPUT:
3699 RETVAL
3700
3701UV
3702rss (Coro::State coro)
3703 PROTOTYPE: $
3704 ALIAS:
3705 usecount = 1
3706 CODE:
3707 switch (ix)
3708 {
3709 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3710 case 1: RETVAL = coro->usecount; break;
807 3711 }
808 New (0, coro, 1, struct coro); 3712 OUTPUT:
809
810 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
811 coro->mainstack = 0; /* actual work is done inside transfer */
812 coro->stack = 0;
813
814 RETVAL = coro; 3713 RETVAL
3714
3715void
3716force_cctx ()
3717 PROTOTYPE:
3718 CODE:
3719 cctx_current->idle_sp = 0;
3720
3721void
3722swap_defsv (Coro::State self)
3723 PROTOTYPE: $
3724 ALIAS:
3725 swap_defav = 1
3726 CODE:
3727 if (!self->slot)
3728 croak ("cannot swap state with coroutine that has no saved state,");
3729 else
3730 {
3731 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3732 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3733
3734 SV *tmp = *src; *src = *dst; *dst = tmp;
3735 }
3736
3737void
3738cancel (Coro::State self)
3739 CODE:
3740 coro_state_destroy (aTHX_ self);
3741
3742SV *
3743enable_times (int enabled = enable_times)
3744 CODE:
3745{
3746 RETVAL = boolSV (enable_times);
3747
3748 if (enabled != enable_times)
3749 {
3750 enable_times = enabled;
3751
3752 coro_times_update ();
3753 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3754 }
3755}
815 OUTPUT: 3756 OUTPUT:
816 RETVAL 3757 RETVAL
817 3758
818void 3759void
819transfer(prev, next, flags) 3760times (Coro::State self)
820 Coro::State_or_hashref prev 3761 PPCODE:
821 Coro::State_or_hashref next 3762{
822 int flags 3763 struct coro *current = SvSTATE (coro_current);
823 PROTOTYPE: @ 3764
3765 if (ecb_expect_false (current == self))
3766 {
3767 coro_times_update ();
3768 coro_times_add (SvSTATE (coro_current));
3769 }
3770
3771 EXTEND (SP, 2);
3772 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3773 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3774
3775 if (ecb_expect_false (current == self))
3776 coro_times_sub (SvSTATE (coro_current));
3777}
3778
3779void
3780swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3781 CODE:
3782{
3783 struct coro *current = SvSTATE_current;
3784
3785 if (current == coro)
3786 SWAP_SVS (current);
3787
3788 if (!coro->swap_sv)
3789 coro->swap_sv = newAV ();
3790
3791 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3792 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3793
3794 if (current == coro)
3795 SWAP_SVS (current);
3796}
3797
3798
3799MODULE = Coro::State PACKAGE = Coro
3800
3801BOOT:
3802{
3803 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3804 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3805 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3806 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3807 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3808 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3809 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3810 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3811
3812 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3813 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3814 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3815 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3816
3817 coro_stash = gv_stashpv ("Coro", TRUE);
3818
3819 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3820 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3821 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3822 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3823 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3824 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3825
3826 {
3827 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3828
3829 coroapi.schedule = api_schedule;
3830 coroapi.schedule_to = api_schedule_to;
3831 coroapi.cede = api_cede;
3832 coroapi.cede_notself = api_cede_notself;
3833 coroapi.ready = api_ready;
3834 coroapi.is_ready = api_is_ready;
3835 coroapi.nready = coro_nready;
3836 coroapi.current = coro_current;
3837
3838 /*GCoroAPI = &coroapi;*/
3839 sv_setiv (sv, (IV)&coroapi);
3840 SvREADONLY_on (sv);
3841 }
3842}
3843
3844SV *
3845async (...)
3846 PROTOTYPE: &@
824 CODE: 3847 CODE:
825 PUTBACK; 3848 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
826 transfer (aTHX_ prev, next, flags); 3849 api_ready (aTHX_ RETVAL);
827 SPAGAIN; 3850 OUTPUT:
3851 RETVAL
828 3852
829void 3853void
830DESTROY(coro) 3854_destroy (Coro::State coro)
831 Coro::State coro 3855 CODE:
832 CODE: 3856 /* used by the manager thread */
833 3857 coro_state_destroy (aTHX_ coro);
834 if (coro->mainstack && coro->mainstack != main_mainstack)
835 {
836 struct coro temp;
837
838 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839 LOAD(aTHX_ coro);
840
841 destroy_stacks (aTHX);
842
843 LOAD((&temp)); /* this will get rid of defsv etc.. */
844
845 coro->mainstack = 0;
846 }
847
848 deallocate_stack (coro);
849
850 Safefree (coro);
851 3858
852void 3859void
853flush() 3860on_destroy (Coro::State coro, SV *cb)
854 CODE: 3861 CODE:
855#ifdef MAY_FLUSH 3862 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
856 flush_padlist_cache ();
857#endif
858 3863
859void 3864void
860_exit(code) 3865join (...)
861 int code 3866 CODE:
3867 CORO_EXECUTE_SLF_XS (slf_init_join);
3868
3869void
3870terminate (...)
3871 CODE:
3872 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3873
3874void
3875cancel (...)
3876 CODE:
3877 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3878
3879int
3880safe_cancel (Coro::State self, ...)
3881 C_ARGS: aTHX_ self, &ST (1), items - 1
3882
3883void
3884schedule (...)
3885 CODE:
3886 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3887
3888void
3889schedule_to (...)
3890 CODE:
3891 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3892
3893void
3894cede_to (...)
3895 CODE:
3896 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3897
3898void
3899cede (...)
3900 CODE:
3901 CORO_EXECUTE_SLF_XS (slf_init_cede);
3902
3903void
3904cede_notself (...)
3905 CODE:
3906 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3907
3908void
3909_set_current (SV *current)
862 PROTOTYPE: $ 3910 PROTOTYPE: $
863 CODE: 3911 CODE:
864#if defined(__GLIBC__) || _POSIX_C_SOURCE 3912 SvREFCNT_dec (SvRV (coro_current));
3913 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3914
3915void
3916_set_readyhook (SV *hook)
3917 PROTOTYPE: $
3918 CODE:
3919 SvREFCNT_dec (coro_readyhook);
3920 SvGETMAGIC (hook);
3921 if (SvOK (hook))
3922 {
3923 coro_readyhook = newSVsv (hook);
3924 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3925 }
3926 else
3927 {
3928 coro_readyhook = 0;
3929 CORO_READYHOOK = 0;
3930 }
3931
3932int
3933prio (Coro::State coro, int newprio = 0)
3934 PROTOTYPE: $;$
3935 ALIAS:
3936 nice = 1
3937 CODE:
3938{
3939 RETVAL = coro->prio;
3940
3941 if (items > 1)
3942 {
3943 if (ix)
3944 newprio = coro->prio - newprio;
3945
3946 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3947 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3948
3949 coro->prio = newprio;
3950 }
3951}
3952 OUTPUT:
3953 RETVAL
3954
3955SV *
3956ready (SV *self)
3957 PROTOTYPE: $
3958 CODE:
3959 RETVAL = boolSV (api_ready (aTHX_ self));
3960 OUTPUT:
3961 RETVAL
3962
3963int
3964nready (...)
3965 PROTOTYPE:
3966 CODE:
3967 RETVAL = coro_nready;
3968 OUTPUT:
3969 RETVAL
3970
3971void
3972suspend (Coro::State self)
3973 PROTOTYPE: $
3974 CODE:
3975 self->flags |= CF_SUSPENDED;
3976
3977void
3978resume (Coro::State self)
3979 PROTOTYPE: $
3980 CODE:
3981 self->flags &= ~CF_SUSPENDED;
3982
3983void
3984_pool_handler (...)
3985 CODE:
3986 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3987
3988void
3989async_pool (SV *cv, ...)
3990 PROTOTYPE: &@
3991 PPCODE:
3992{
3993 HV *hv = (HV *)av_pop (av_async_pool);
3994 AV *av = newAV ();
3995 SV *cb = ST (0);
3996 int i;
3997
3998 av_extend (av, items - 2);
3999 for (i = 1; i < items; ++i)
4000 av_push (av, SvREFCNT_inc_NN (ST (i)));
4001
4002 if ((SV *)hv == &PL_sv_undef)
4003 {
4004 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4005 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4006 SvREFCNT_dec (sv);
4007 }
4008
4009 {
4010 struct coro *coro = SvSTATE_hv (hv);
4011
4012 assert (!coro->invoke_cb);
4013 assert (!coro->invoke_av);
4014 coro->invoke_cb = SvREFCNT_inc (cb);
4015 coro->invoke_av = av;
4016 }
4017
4018 api_ready (aTHX_ (SV *)hv);
4019
4020 if (GIMME_V != G_VOID)
4021 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4022 else
4023 SvREFCNT_dec (hv);
4024}
4025
4026SV *
4027rouse_cb ()
4028 PROTOTYPE:
4029 CODE:
4030 RETVAL = coro_new_rouse_cb (aTHX);
4031 OUTPUT:
4032 RETVAL
4033
4034void
4035rouse_wait (...)
4036 PROTOTYPE: ;$
4037 PPCODE:
4038 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4039
4040void
4041on_enter (SV *block)
4042 ALIAS:
4043 on_leave = 1
4044 PROTOTYPE: &
4045 CODE:
4046{
4047 struct coro *coro = SvSTATE_current;
4048 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4049
4050 block = s_get_cv_croak (block);
4051
4052 if (!*avp)
4053 *avp = newAV ();
4054
4055 av_push (*avp, SvREFCNT_inc (block));
4056
4057 if (!ix)
4058 on_enterleave_call (aTHX_ block);
4059
4060 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4061 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4062 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4063}
4064
4065
4066MODULE = Coro::State PACKAGE = PerlIO::cede
4067
4068BOOT:
4069 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4070
4071
4072MODULE = Coro::State PACKAGE = Coro::Semaphore
4073
4074SV *
4075new (SV *klass, SV *count = 0)
4076 CODE:
4077{
4078 int semcnt = 1;
4079
4080 if (count)
4081 {
4082 SvGETMAGIC (count);
4083
4084 if (SvOK (count))
4085 semcnt = SvIV (count);
4086 }
4087
4088 RETVAL = sv_bless (
4089 coro_waitarray_new (aTHX_ semcnt),
4090 GvSTASH (CvGV (cv))
4091 );
4092}
4093 OUTPUT:
4094 RETVAL
4095
4096# helper for Coro::Channel and others
4097SV *
4098_alloc (int count)
4099 CODE:
4100 RETVAL = coro_waitarray_new (aTHX_ count);
4101 OUTPUT:
4102 RETVAL
4103
4104SV *
4105count (SV *self)
4106 CODE:
4107 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4108 OUTPUT:
4109 RETVAL
4110
4111void
4112up (SV *self, int adjust = 1)
4113 ALIAS:
4114 adjust = 1
4115 CODE:
4116 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4117
4118void
4119down (...)
4120 CODE:
4121 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4122
4123void
4124wait (...)
4125 CODE:
4126 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4127
4128void
4129try (SV *self)
4130 PPCODE:
4131{
4132 AV *av = (AV *)SvRV (self);
4133 SV *count_sv = AvARRAY (av)[0];
4134 IV count = SvIVX (count_sv);
4135
4136 if (count > 0)
4137 {
4138 --count;
4139 SvIVX (count_sv) = count;
4140 XSRETURN_YES;
4141 }
4142 else
4143 XSRETURN_NO;
4144}
4145
4146void
4147waiters (SV *self)
4148 PPCODE:
4149{
4150 AV *av = (AV *)SvRV (self);
4151 int wcount = AvFILLp (av) + 1 - 1;
4152
4153 if (GIMME_V == G_SCALAR)
4154 XPUSHs (sv_2mortal (newSViv (wcount)));
4155 else
4156 {
4157 int i;
4158 EXTEND (SP, wcount);
4159 for (i = 1; i <= wcount; ++i)
4160 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4161 }
4162}
4163
4164MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4165
4166void
4167_may_delete (SV *sem, int count, unsigned int extra_refs)
4168 PPCODE:
4169{
4170 AV *av = (AV *)SvRV (sem);
4171
4172 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4173 && AvFILLp (av) == 0 /* no waiters, just count */
4174 && SvIV (AvARRAY (av)[0]) == count)
4175 XSRETURN_YES;
4176
4177 XSRETURN_NO;
4178}
4179
4180MODULE = Coro::State PACKAGE = Coro::Signal
4181
4182SV *
4183new (SV *klass)
4184 CODE:
4185 RETVAL = sv_bless (
4186 coro_waitarray_new (aTHX_ 0),
4187 GvSTASH (CvGV (cv))
4188 );
4189 OUTPUT:
4190 RETVAL
4191
4192void
4193wait (...)
4194 CODE:
4195 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4196
4197void
4198broadcast (SV *self)
4199 CODE:
4200{
4201 AV *av = (AV *)SvRV (self);
4202 coro_signal_wake (aTHX_ av, AvFILLp (av));
4203}
4204
4205void
4206send (SV *self)
4207 CODE:
4208{
4209 AV *av = (AV *)SvRV (self);
4210
4211 if (AvFILLp (av))
4212 coro_signal_wake (aTHX_ av, 1);
4213 else
4214 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4215}
4216
4217IV
4218awaited (SV *self)
4219 CODE:
4220 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4221 OUTPUT:
4222 RETVAL
4223
4224
4225MODULE = Coro::State PACKAGE = Coro::AnyEvent
4226
4227BOOT:
4228 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4229
4230void
4231_schedule (...)
4232 CODE:
4233{
4234 static int incede;
4235
4236 api_cede_notself (aTHX);
4237
4238 ++incede;
4239 while (coro_nready >= incede && api_cede (aTHX))
4240 ;
4241
4242 sv_setsv (sv_activity, &PL_sv_undef);
4243 if (coro_nready >= incede)
4244 {
4245 PUSHMARK (SP);
4246 PUTBACK;
4247 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4248 }
4249
4250 --incede;
4251}
4252
4253
4254MODULE = Coro::State PACKAGE = Coro::AIO
4255
4256void
4257_register (char *target, char *proto, SV *req)
4258 CODE:
4259{
4260 SV *req_cv = s_get_cv_croak (req);
4261 /* newXSproto doesn't return the CV on 5.8 */
4262 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4263 sv_setpv ((SV *)slf_cv, proto);
4264 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4265}
4266
4267MODULE = Coro::State PACKAGE = Coro::Select
4268
4269void
4270patch_pp_sselect ()
4271 CODE:
4272 if (!coro_old_pp_sselect)
4273 {
4274 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4275 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4276 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4277 }
4278
4279void
4280unpatch_pp_sselect ()
4281 CODE:
4282 if (coro_old_pp_sselect)
4283 {
4284 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4285 coro_old_pp_sselect = 0;
4286 }
4287
4288MODULE = Coro::State PACKAGE = Coro::Util
4289
4290void
4291_exit (int code)
4292 CODE:
865 _exit (code); 4293 _exit (code);
866#else
867 signal (SIGTERM, SIG_DFL);
868 raise (SIGTERM);
869 exit (code);
870#endif
871 4294
872MODULE = Coro::State PACKAGE = Coro::Cont 4295NV
873 4296time ()
874# this is slightly dirty (should expose a c-level api)
875
876void
877yield(...)
878 PROTOTYPE: @
879 CODE:
880 static SV *returnstk;
881 SV *sv;
882 AV *defav = GvAV (PL_defgv);
883 struct coro *prev, *next;
884
885 if (!returnstk)
886 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
887
888 /* set up @_ -- ugly */
889 av_clear (defav);
890 av_fill (defav, items - 1);
891 while (items--)
892 av_store (defav, items, SvREFCNT_inc (ST(items)));
893
894 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
895 sv = av_pop ((AV *)SvRV (returnstk));
896 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
897 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
898 SvREFCNT_dec (sv);
899
900 transfer(aTHX_ prev, next, 0);
901
902MODULE = Coro::State PACKAGE = Coro
903
904# this is slightly dirty (should expose a c-level api)
905
906BOOT:
907{
908 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
909 coro_ready = newAV ();
910 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
911}
912
913void
914ready(self)
915 SV * self
916 CODE: 4297 CODE:
917 av_push (coro_ready, SvREFCNT_inc (self)); 4298 RETVAL = nvtime (aTHX);
4299 OUTPUT:
4300 RETVAL
918 4301
919void 4302NV
920schedule(...) 4303gettimeofday ()
921 ALIAS:
922 cede = 1
923 CODE: 4304 PPCODE:
924 SV *prev = GvSV (coro_current); 4305{
925 SV *next = av_shift (coro_ready); 4306 UV tv [2];
4307 u2time (aTHX_ tv);
4308 EXTEND (SP, 2);
4309 PUSHs (sv_2mortal (newSVuv (tv [0])));
4310 PUSHs (sv_2mortal (newSVuv (tv [1])));
4311}
926 4312
927 if (next == &PL_sv_undef)
928 next = SvREFCNT_inc (GvSV (coro_idle));
929
930 if (ix)
931 av_push (coro_ready, SvREFCNT_inc (prev));
932
933 GvSV (coro_current) = SvREFCNT_inc (next);
934 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935 sv_to_coro (next, "Coro::schedule", "next coroutine"),
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937 SvREFCNT_dec (next);
938 SvREFCNT_dec (prev);
939

Diff Legend

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