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Comparing Coro/Coro/State.xs (file contents):
Revision 1.86 by root, Fri Nov 24 11:36:57 2006 UTC vs.
Revision 1.447 by root, Tue Oct 14 21:53:32 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
1#define PERL_NO_GET_CONTEXT 8#define PERL_NO_GET_CONTEXT
2 9#define PERL_EXT
3#include "libcoro/coro.c"
4 10
5#include "EXTERN.h" 11#include "EXTERN.h"
6#include "perl.h" 12#include "perl.h"
7#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
8 15
9#include "patchlevel.h" 16#include "schmorp.h"
10 17
11#if PERL_VERSION < 6 18#define ECB_NO_THREADS 1
12# ifndef PL_ppaddr 19#define ECB_NO_LIBM 1
13# define PL_ppaddr ppaddr 20#include "ecb.h"
21
22#include <stddef.h>
23#include <stdio.h>
24#include <errno.h>
25#include <assert.h>
26
27#ifndef SVs_PADSTALE
28# define SVs_PADSTALE 0
29#endif
30
31#ifdef PadARRAY
32# define NEWPADAPI 1
33# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
34#else
35typedef AV PADNAMELIST;
36# if !PERL_VERSION_ATLEAST(5,8,0)
37typedef AV PADLIST;
38typedef AV PAD;
14# endif 39# endif
15# ifndef call_sv 40# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
16# define call_sv perl_call_sv 41# define PadlistMAX(pl) AvFILLp (pl)
42# define PadlistNAMES(pl) (*PadlistARRAY (pl))
43# define PadARRAY AvARRAY
44# define PadMAX AvFILLp
45# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
46#endif
47
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
53
54#if defined(_WIN32)
55# undef HAS_GETTIMEOFDAY
56# undef setjmp
57# undef longjmp
58# undef _exit
59# define setjmp _setjmp /* deep magic */
60#else
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;
17# endif 94# endif
18# ifndef get_sv 95#endif
19# define get_sv perl_get_sv 96
97#ifdef __linux
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
20# endif 104# endif
21# ifndef get_cv
22# define get_cv perl_get_cv
23# endif 105#endif
24# ifndef IS_PADGV
25# define IS_PADGV(v) 0
26# endif
27# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0
29# endif
30#endif
31 106
32#include <errno.h> 107static double (*nvtime)(); /* so why doesn't it take void? */
108static void (*u2time)(pTHX_ UV ret[2]);
33 109
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 110/* we hijack an hopefully unused CV flag for our purposes */
35# undef STACKGUARD 111#define CVf_SLF 0x4000
36#endif 112static OP *pp_slf (pTHX);
113static void slf_destroy (pTHX_ struct coro *coro);
37 114
38#ifndef STACKGUARD 115static U32 cctx_gen;
39# define STACKGUARD 0 116static size_t cctx_stacksize = CORO_STACKSIZE;
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64
65/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 117static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 118static AV *main_mainstack; /* used to differentiate between $main and others */
119static JMPENV *main_top_env;
87static HV *coro_state_stash; 120static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 121static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 122
92/* 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 */
93typedef struct { 164typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 165{
95 int usecnt; /* shared by how many coroutines */ 166 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 167
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;
98 coro_context cctx; 177 coro_context cctx;
99 178
100 void *sptr; 179 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 180#if CORO_USE_VALGRIND
102} coro_stack; 181 int valgrind_id;
182#endif
183 unsigned char flags;
184} coro_cctx;
103 185
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 */
104struct coro { 213struct coro
105 /* the optional C context */ 214{
106 coro_stack *stack; 215 /* the C coroutine allocated to this perl coroutine, if any */
107 void *cursp; 216 coro_cctx *cctx;
108 int gencnt;
109 217
110 /* optionally saved, might be zero */ 218 /* ready queue */
111 AV *defav; 219 struct coro *next_ready;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118 220
119 /* the stacks and related info (callchain etc..) */ 221 /* state data */
120 PERL_SI *curstackinfo; 222 struct CoroSLF slf_frame; /* saved slf frame */
121 AV *curstack;
122 AV *mainstack; 223 AV *mainstack;
123 SV **stack_sp; 224 perl_slots *slot; /* basically the saved sp */
124 OP *op;
125 SV **curpad;
126 AV *comppad;
127 CV *compcv;
128 SV **stack_base;
129 SV **stack_max;
130 SV **tmps_stack;
131 I32 tmps_floor;
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 225
226 CV *startcv; /* the CV to execute */
150 /* data associated with this coroutine (initial args) */ 227 AV *args; /* data associated with this coroutine (initial args) */
151 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;
152}; 258};
153 259
154typedef struct coro *Coro__State; 260typedef struct coro *Coro__State;
155typedef struct coro *Coro__State_or_hashref; 261typedef struct coro *Coro__State_or_hashref;
156 262
263/* the following variables are effectively part of the perl context */
264/* and get copied between struct coro and these variables */
265/* the main reason we don't support windows process emulation */
266static struct CoroSLF slf_frame; /* the current slf frame */
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
276
277/* for Coro.pm */
278static SV *coro_current;
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
284
285/** JIT *********************************************************************/
286
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... */
157static AV * 314static OP *
315coro_pp_sselect (pTHX)
316{
317 dSP;
318 PUSHMARK (SP - 4); /* fake argument list */
319 XPUSHs (coro_select_select);
320 PUTBACK;
321
322 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
323 PL_op->op_flags |= OPf_STACKED;
324 PL_op->op_private = 0;
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{
363 SV **svp;
364
365 require_pv ("Time/HiRes.pm");
366
367 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
368
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 *
158coro_clone_padlist (pTHX_ CV *cv) 518coro_derive_padlist (pTHX_ CV *cv)
159{ 519{
160 AV *padlist = CvPADLIST (cv); 520 PADLIST *padlist = CvPADLIST (cv);
161 AV *newpadlist, *newpad; 521 PADLIST *newpadlist;
522 PAD *newpad;
523 PADOFFSET off = PadlistMAX (padlist) + 1;
162 524
163 newpadlist = newAV (); 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. */
164 AvREAL_off (newpadlist); 553 AvREAL_off (newpadlist);
165#if PERL_VERSION < 9
166 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169#endif 554#endif
170 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171 --AvFILLp (padlist);
172 555
173 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 556 /* Already extended to 2 elements by newPADLIST. */
174 av_store (newpadlist, 1, (SV *)newpad); 557 PadlistMAX (newpadlist) = 1;
558 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
559 PadlistARRAY (newpadlist)[1] = newpad;
175 560
176 return newpadlist; 561 return newpadlist;
177} 562}
178 563
179static void 564ecb_inline void
180free_padlist (pTHX_ AV *padlist) 565free_padlist (pTHX_ PADLIST *padlist)
181{ 566{
182 /* may be during global destruction */ 567 /* may be during global destruction */
183 if (SvREFCNT (padlist)) 568 if (!IN_DESTRUCT)
184 { 569 {
185 I32 i = AvFILLp (padlist); 570 I32 i = PadlistMAX (padlist);
186 while (i >= 0) 571
572 while (i > 0) /* special-case index 0 */
187 { 573 {
188 SV **svp = av_fetch (padlist, i--, FALSE); 574 /* we try to be extra-careful here */
575 PAD *pad = PadlistARRAY (padlist)[i--];
576
189 if (svp) 577 if (pad)
190 { 578 {
191 SV *sv; 579 I32 j = PadMAX (pad);
192 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 580
581 while (j >= 0)
193 SvREFCNT_dec (sv); 582 SvREFCNT_dec (PadARRAY (pad)[j--]);
194 583
584 PadMAX (pad) = -1;
195 SvREFCNT_dec (*svp); 585 SvREFCNT_dec (pad);
196 } 586 }
197 } 587 }
198 588
589 SvREFCNT_dec (PadlistNAMES (padlist));
590
591#if NEWPADAPI
592 Safefree (PadlistARRAY (padlist));
593 Safefree (padlist);
594#else
595 AvFILLp (padlist) = -1;
596 AvREAL_off (padlist);
199 SvREFCNT_dec ((SV*)padlist); 597 SvREFCNT_dec ((SV*)padlist);
598#endif
200 } 599 }
201} 600}
202 601
203static int 602static int
204coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 603coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
205{ 604{
206 AV *padlist; 605 PADLIST *padlist;
207 AV *av = (AV *)mg->mg_obj; 606 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
607 size_t len = *(size_t *)mg->mg_ptr;
208 608
209 /* casting is fun. */ 609 /* perl manages to free our internal AV and _then_ call us */
210 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 610 if (IN_DESTRUCT)
611 return 0;
612
613 while (len--)
211 free_padlist (aTHX_ padlist); 614 free_padlist (aTHX_ padlists[len]);
212
213 SvREFCNT_dec (av);
214 615
215 return 0; 616 return 0;
216} 617}
217 618
218#define PERL_MAGIC_coro PERL_MAGIC_ext 619static MGVTBL coro_cv_vtbl = {
219 620 0, 0, 0, 0,
220static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 621 coro_cv_free
622};
221 623
222/* the next two functions merely cache the padlists */ 624/* the next two functions merely cache the padlists */
223static void 625ecb_inline void
224get_padlist (pTHX_ CV *cv) 626get_padlist (pTHX_ CV *cv)
225{ 627{
226 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 628 MAGIC *mg = CORO_MAGIC_cv (cv);
629 size_t *lenp;
227 630
228 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 631 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 632 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
230 else 633 else
231 { 634 {
232#if 0 635#if CORO_PREFER_PERL_FUNCTIONS
233 /* this should work - but it doesn't :( */ 636 /* this is probably cleaner? but also slower! */
637 /* in practise, it seems to be less stable */
234 CV *cp = Perl_cv_clone (aTHX_ cv); 638 CV *cp = Perl_cv_clone (aTHX_ cv);
235 CvPADLIST (cv) = CvPADLIST (cp); 639 CvPADLIST (cv) = CvPADLIST (cp);
236 CvPADLIST (cp) = 0; 640 CvPADLIST (cp) = 0;
237 SvREFCNT_dec (cp); 641 SvREFCNT_dec (cp);
238#else 642#else
239 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 643 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
240#endif 644#endif
241 } 645 }
242} 646}
243 647
244static void 648ecb_inline void
245put_padlist (pTHX_ CV *cv) 649put_padlist (pTHX_ CV *cv)
246{ 650{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 651 MAGIC *mg = CORO_MAGIC_cv (cv);
248 652
249 if (!mg) 653 if (ecb_expect_false (!mg))
250 {
251 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253 mg->mg_virtual = &vtbl_coro;
254 mg->mg_obj = (SV *)newAV ();
255 } 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);
256 663
257 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 664 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
258} 665}
259 666
260#define SB do { 667/** load & save, init *******************************************************/
261#define SE } while (0)
262 668
263#define LOAD(state) load_state(aTHX_ (state)); 669ecb_inline void
264#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 670swap_sv (SV *a, SV *b)
671{
672 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
673 SV tmp;
265 674
266#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 675 /* swap sv_any */
676 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
267 677
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);
703 }
704#endif
705}
706
707/* swap sv heads, at least logically */
268static 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
269load_state(pTHX_ Coro__State c) 725load_perl (pTHX_ Coro__State c)
270{ 726{
271 PL_dowarn = c->dowarn; 727 perl_slots *slot = c->slot;
272 PL_in_eval = c->in_eval; 728 c->slot = 0;
273 729
274 PL_curstackinfo = c->curstackinfo;
275 PL_curstack = c->curstack;
276 PL_mainstack = c->mainstack; 730 PL_mainstack = c->mainstack;
277 PL_stack_sp = c->stack_sp;
278 PL_op = c->op;
279 PL_curpad = c->curpad;
280 PL_comppad = c->comppad;
281 PL_compcv = c->compcv;
282 PL_stack_base = c->stack_base;
283 PL_stack_max = c->stack_max;
284 PL_tmps_stack = c->tmps_stack;
285 PL_tmps_floor = c->tmps_floor;
286 PL_tmps_ix = c->tmps_ix;
287 PL_tmps_max = c->tmps_max;
288 PL_markstack = c->markstack;
289 PL_markstack_ptr = c->markstack_ptr;
290 PL_markstack_max = c->markstack_max;
291 PL_scopestack = c->scopestack;
292 PL_scopestack_ix = c->scopestack_ix;
293 PL_scopestack_max = c->scopestack_max;
294 PL_savestack = c->savestack;
295 PL_savestack_ix = c->savestack_ix;
296 PL_savestack_max = c->savestack_max;
297#if PERL_VERSION < 9
298 PL_retstack = c->retstack;
299 PL_retstack_ix = c->retstack_ix;
300 PL_retstack_max = c->retstack_max;
301#endif
302 PL_curpm = c->curpm;
303 PL_curcop = c->curcop;
304 PL_top_env = c->top_env;
305 731
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 732#if CORO_JIT
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 733 load_perl_slots (slot);
308 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
309 738
310 { 739 {
311 dSP; 740 dSP;
741
312 CV *cv; 742 CV *cv;
313 743
314 /* now do the ugly restore mess */ 744 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 745 while (ecb_expect_true (cv = (CV *)POPs))
316 { 746 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 747 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 748 CvDEPTH (cv) = PTR2IV (POPs);
323 } 749 CvPADLIST (cv) = (PADLIST *)POPs;
324
325 ++CvDEPTH(cv);
326 } 750 }
327 751
328 PUTBACK; 752 PUTBACK;
329 } 753 }
330}
331 754
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
332static void 777static void
333save_state(pTHX_ Coro__State c, int flags) 778save_perl (pTHX_ Coro__State c)
334{ 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
335 { 801 {
336 dSP; 802 dSP;
337 I32 cxix = cxstack_ix; 803 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 804 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 805 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 807 /*
342 * 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
343 * (and reinitialize) all cv's in the whole callchain :( 809 * (and reinitialize) all cv's in the whole callchain :(
344 */ 810 */
345 811
346 PUSHs (Nullsv); 812 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 813 /* this loop was inspired by pp_caller */
348 for (;;) 814 for (;;)
349 { 815 {
350 while (cxix >= 0) 816 while (ecb_expect_true (cxix >= 0))
351 { 817 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 818 PERL_CONTEXT *cx = &ccstk[cxix--];
353 819
354 if (CxTYPE(cx) == CXt_SUB) 820 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
355 { 821 {
356 CV *cv = cx->blk_sub.cv; 822 CV *cv = cx->blk_sub.cv;
823
357 if (CvDEPTH(cv)) 824 if (ecb_expect_true (CvDEPTH (cv)))
358 { 825 {
359 EXTEND (SP, CvDEPTH(cv)*2); 826 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 827 PUSHs ((SV *)CvPADLIST (cv));
828 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 829 PUSHs ((SV *)cv);
370 830
831 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 832 get_padlist (aTHX_ cv);
372 } 833 }
373 } 834 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 835 }
383 836
384 if (top_si->si_type == PERLSI_MAIN) 837 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 838 break;
386 839
387 top_si = top_si->si_prev; 840 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 841 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 842 cxix = top_si->si_cxix;
390 } 843 }
391 844
392 PUTBACK; 845 PUTBACK;
393 } 846 }
394 847
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 848 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 849 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 850 {
851 unsigned int i;
398 852
399 c->dowarn = PL_dowarn; 853 for (i = 0; i < SLOT_COUNT; ++i)
400 c->in_eval = PL_in_eval; 854 CXINC;
401 855
402 c->curstackinfo = PL_curstackinfo; 856 cxstack_ix -= SLOT_COUNT; /* undo allocation */
403 c->curstack = PL_curstack; 857 }
858
404 c->mainstack = PL_mainstack; 859 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 860
406 c->op = PL_op; 861 {
407 c->curpad = PL_curpad; 862 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 863
409 c->compcv = PL_compcv; 864#if CORO_JIT
410 c->stack_base = PL_stack_base; 865 save_perl_slots (slot);
411 c->stack_max = PL_stack_max; 866#else
412 c->tmps_stack = PL_tmps_stack; 867 #define VARx(name,expr,type) slot->name = expr;
413 c->tmps_floor = PL_tmps_floor; 868 #include "state.h"
414 c->tmps_ix = PL_tmps_ix;
415 c->tmps_max = PL_tmps_max;
416 c->markstack = PL_markstack;
417 c->markstack_ptr = PL_markstack_ptr;
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif 869#endif
430 c->curpm = PL_curpm; 870 }
431 c->curcop = PL_curcop;
432 c->top_env = PL_top_env;
433} 871}
434 872
435/* 873/*
436 * allocate various perl stacks. This is an exact copy 874 * allocate various perl stacks. This is almost an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 875 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 876 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 877 * not usually need a lot of stackspace.
440 */ 878 */
879#if CORO_PREFER_PERL_FUNCTIONS
880# define coro_init_stacks(thx) init_stacks ()
881#else
441static void 882static void
442coro_init_stacks (pTHX) 883coro_init_stacks (pTHX)
443{ 884{
444 LOCK; 885 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
445
446 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447 PL_curstackinfo->si_type = PERLSI_MAIN; 886 PL_curstackinfo->si_type = PERLSI_MAIN;
448 PL_curstack = PL_curstackinfo->si_stack; 887 PL_curstack = PL_curstackinfo->si_stack;
449 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 888 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450 889
451 PL_stack_base = AvARRAY(PL_curstack); 890 PL_stack_base = AvARRAY(PL_curstack);
452 PL_stack_sp = PL_stack_base; 891 PL_stack_sp = PL_stack_base;
453 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 892 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454 893
455 New(50,PL_tmps_stack,96,SV*); 894 New(50,PL_tmps_stack,32,SV*);
456 PL_tmps_floor = -1; 895 PL_tmps_floor = -1;
457 PL_tmps_ix = -1; 896 PL_tmps_ix = -1;
458 PL_tmps_max = 96; 897 PL_tmps_max = 32;
459 898
460 New(54,PL_markstack,16,I32); 899 New(54,PL_markstack,16,I32);
461 PL_markstack_ptr = PL_markstack; 900 PL_markstack_ptr = PL_markstack;
462 PL_markstack_max = PL_markstack + 16; 901 PL_markstack_max = PL_markstack + 16;
463 902
464#ifdef SET_MARK_OFFSET 903#ifdef SET_MARK_OFFSET
465 SET_MARK_OFFSET; 904 SET_MARK_OFFSET;
466#endif 905#endif
467 906
468 New(54,PL_scopestack,16,I32); 907 New(54,PL_scopestack,8,I32);
469 PL_scopestack_ix = 0; 908 PL_scopestack_ix = 0;
470 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
471 913
472 New(54,PL_savestack,96,ANY); 914 New(54,PL_savestack,24,ANY);
473 PL_savestack_ix = 0; 915 PL_savestack_ix = 0;
474 PL_savestack_max = 96; 916 PL_savestack_max = 24;
475 917
476#if PERL_VERSION < 9 918#if !PERL_VERSION_ATLEAST (5,10,0)
477 New(54,PL_retstack,8,OP*); 919 New(54,PL_retstack,4,OP*);
478 PL_retstack_ix = 0; 920 PL_retstack_ix = 0;
479 PL_retstack_max = 8; 921 PL_retstack_max = 4;
480#endif 922#endif
481
482 UNLOCK;
483} 923}
924#endif
484 925
485/* 926/*
486 * destroy the stacks, the callchain etc... 927 * destroy the stacks, the callchain etc...
487 */ 928 */
488static void 929static void
489destroy_stacks(pTHX) 930coro_destruct_stacks (pTHX)
490{ 931{
491 if (!IN_DESTRUCT)
492 {
493 /* is this ugly, I ask? */
494 LEAVE_SCOPE (0);
495
496 /* sure it is, but more important: is it correct?? :/ */
497 FREETMPS;
498
499 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500 }
501
502 while (PL_curstackinfo->si_next) 932 while (PL_curstackinfo->si_next)
503 PL_curstackinfo = PL_curstackinfo->si_next; 933 PL_curstackinfo = PL_curstackinfo->si_next;
504 934
505 while (PL_curstackinfo) 935 while (PL_curstackinfo)
506 { 936 {
507 PERL_SI *p = PL_curstackinfo->si_prev; 937 PERL_SI *p = PL_curstackinfo->si_prev;
508 938
509 { /*D*//*remove*/
510 dSP;
511 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512 PUTBACK; /* possibly superfluous */
513 }
514
515 if (!IN_DESTRUCT) 939 if (!IN_DESTRUCT)
516 {
517 dounwind (-1);/*D*//*remove*/
518 SvREFCNT_dec (PL_curstackinfo->si_stack); 940 SvREFCNT_dec (PL_curstackinfo->si_stack);
519 }
520 941
521 Safefree (PL_curstackinfo->si_cxstack); 942 Safefree (PL_curstackinfo->si_cxstack);
522 Safefree (PL_curstackinfo); 943 Safefree (PL_curstackinfo);
523 PL_curstackinfo = p; 944 PL_curstackinfo = p;
524 } 945 }
525 946
526 Safefree (PL_tmps_stack); 947 Safefree (PL_tmps_stack);
527 Safefree (PL_markstack); 948 Safefree (PL_markstack);
528 Safefree (PL_scopestack); 949 Safefree (PL_scopestack);
950#if HAS_SCOPESTACK_NAME
951 Safefree (PL_scopestack_name);
952#endif
529 Safefree (PL_savestack); 953 Safefree (PL_savestack);
530#if PERL_VERSION < 9 954#if !PERL_VERSION_ATLEAST (5,10,0)
531 Safefree (PL_retstack); 955 Safefree (PL_retstack);
532#endif 956#endif
533} 957}
534 958
535static void 959#define CORO_RSS \
536allocate_stack (Coro__State ctx, int alloc) 960 rss += sizeof (SYM (curstackinfo)); \
537{ 961 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
538 coro_stack *stack; 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);
539 967
540 New (0, stack, 1, coro_stack); 968static size_t
969coro_rss (pTHX_ struct coro *coro)
970{
971 size_t rss = sizeof (*coro);
541 972
542 stack->refcnt = 1; 973 if (coro->mainstack)
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545
546 if (alloc)
547 { 974 {
548#if HAVE_MMAP 975 if (coro->flags & CF_RUNNING)
549 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr != (void *)-1)
552 { 976 {
553# if STACKGUARD 977 #define SYM(sym) PL_ ## sym
554 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 978 CORO_RSS;
555# endif 979 #undef SYM
556 } 980 }
557 else 981 else
558#endif
559 { 982 {
560 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 983 #define SYM(sym) coro->slot->sym
561 New (0, stack->sptr, STACKSIZE, long); 984 CORO_RSS;
985 #undef SYM
562 } 986 }
563 } 987 }
564 else
565 stack->sptr = 0;
566 988
567 ctx->stack = stack; 989 return rss;
568} 990}
569 991
570static void 992/** coroutine stack handling ************************************************/
571deallocate_stack (Coro__State ctx)
572{
573 coro_stack *stack = ctx->stack;
574 993
575 ctx->stack = 0; 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);
576 997
577 if (stack) 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 == '_')
578 { 1017 {
579 if (!--stack->refcnt) 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)
580 { 1024 {
581#ifdef HAVE_MMAP 1025 SV *ssv;
582 if (stack->ssize > 0 && stack->sptr) 1026
583 munmap (stack->sptr, stack->ssize); 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));
584 else 1031 else
585#endif 1032 ssv = *svp;
586 Safefree (stack->sptr);
587 1033
588 Safefree (stack); 1034 sv_setsv (sv, ssv);
1035 return 0;
589 } 1036 }
590 else if (ctx->gencnt == stack->gencnt) 1037 }
591 --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 == '_')
592 } 1048 {
593} 1049 SV **svp = 0;
594 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
595static void 1097static int
596setup_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)
597{ 1113{
598 /* 1114 /*
599 * emulate part of the perl startup here. 1115 * emulate part of the perl startup here.
600 */ 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) = newHV ();
1144#if PERL_VERSION_ATLEAST (5,10,0)
1145 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1146#endif
1147 PL_rs = newSVsv (GvSV (irsgv));
1148 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1149
1150 {
1151 dSP;
1152 UNOP myop;
1153
1154 Zero (&myop, 1, UNOP);
1155 myop.op_next = Nullop;
1156 myop.op_type = OP_ENTERSUB;
1157 myop.op_flags = OPf_WANT_VOID;
1158
1159 PUSHMARK (SP);
1160 PUSHs ((SV *)coro->startcv);
1161 PUTBACK;
1162 PL_op = (OP *)&myop;
1163 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1164 }
1165
1166 /* this newly created coroutine might be run on an existing cctx which most
1167 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1168 */
1169 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1170 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1171 slf_frame.destroy = 0;
1172
1173 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1174 init_perl_op.op_next = PL_op;
1175 init_perl_op.op_type = OP_ENTERSUB;
1176 init_perl_op.op_ppaddr = pp_slf;
1177 /* no flags etc. required, as an init function won't be called */
1178
1179 PL_op = (OP *)&init_perl_op;
1180
1181 /* copy throw, in case it was set before init_perl */
1182 CORO_THROW = coro->except;
1183
1184 SWAP_SVS (coro);
1185
1186 if (ecb_expect_false (enable_times))
1187 {
1188 coro_times_update ();
1189 coro_times_sub (coro);
1190 }
1191}
1192
1193static void
1194coro_unwind_stacks (pTHX)
1195{
1196 if (!IN_DESTRUCT)
1197 {
1198 /* restore all saved variables and stuff */
1199 LEAVE_SCOPE (0);
1200 assert (PL_tmps_floor == -1);
1201
1202 /* free all temporaries */
1203 FREETMPS;
1204 assert (PL_tmps_ix == -1);
1205
1206 /* unwind all extra stacks */
1207 POPSTACK_TO (PL_mainstack);
1208
1209 /* unwind main stack */
1210 dounwind (-1);
1211 }
1212}
1213
1214static void
1215destroy_perl (pTHX_ struct coro *coro)
1216{
1217 SV *svf [9];
1218
1219 {
1220 SV *old_current = SvRV (coro_current);
1221 struct coro *current = SvSTATE (old_current);
1222
1223 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1224
1225 save_perl (aTHX_ current);
1226
1227 /* this will cause transfer_check to croak on block*/
1228 SvRV_set (coro_current, (SV *)coro->hv);
1229
1230 load_perl (aTHX_ coro);
1231
1232 coro_unwind_stacks (aTHX);
1233
1234 /* restore swapped sv's */
1235 SWAP_SVS (coro);
1236
1237 coro_destruct_stacks (aTHX);
1238
1239 /* now save some sv's to be free'd later */
1240 svf [0] = GvSV (PL_defgv);
1241 svf [1] = (SV *)GvAV (PL_defgv);
1242 svf [2] = GvSV (PL_errgv);
1243 svf [3] = (SV *)PL_defoutgv;
1244 svf [4] = PL_rs;
1245 svf [5] = GvSV (irsgv);
1246 svf [6] = (SV *)GvHV (PL_hintgv);
1247 svf [7] = PL_diehook;
1248 svf [8] = PL_warnhook;
1249 assert (9 == sizeof (svf) / sizeof (*svf));
1250
1251 SvRV_set (coro_current, old_current);
1252
1253 load_perl (aTHX_ current);
1254 }
1255
1256 {
1257 unsigned int i;
1258
1259 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1260 SvREFCNT_dec (svf [i]);
1261
1262 SvREFCNT_dec (coro->saved_deffh);
1263 SvREFCNT_dec (coro->rouse_cb);
1264 SvREFCNT_dec (coro->invoke_cb);
1265 SvREFCNT_dec (coro->invoke_av);
1266 }
1267}
1268
1269ecb_inline void
1270free_coro_mortal (pTHX)
1271{
1272 if (ecb_expect_true (coro_mortal))
1273 {
1274 SvREFCNT_dec ((SV *)coro_mortal);
1275 coro_mortal = 0;
1276 }
1277}
1278
1279static int
1280runops_trace (pTHX)
1281{
1282 COP *oldcop = 0;
1283 int oldcxix = -2;
1284
1285 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1286 {
1287 PERL_ASYNC_CHECK ();
1288
1289 if (cctx_current->flags & CC_TRACE_ALL)
1290 {
1291 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1292 {
1293 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1294 SV **bot, **top;
1295 AV *av = newAV (); /* return values */
1296 SV **cb;
1297 dSP;
1298
1299 GV *gv = CvGV (cx->blk_sub.cv);
1300 SV *fullname = sv_2mortal (newSV (0));
1301 if (isGV (gv))
1302 gv_efullname3 (fullname, gv, 0);
1303
1304 bot = PL_stack_base + cx->blk_oldsp + 1;
1305 top = cx->blk_gimme == G_ARRAY ? SP + 1
1306 : cx->blk_gimme == G_SCALAR ? bot + 1
1307 : bot;
1308
1309 av_extend (av, top - bot);
1310 while (bot < top)
1311 av_push (av, SvREFCNT_inc_NN (*bot++));
1312
1313 PL_runops = RUNOPS_DEFAULT;
1314 ENTER;
1315 SAVETMPS;
1316 EXTEND (SP, 3);
1317 PUSHMARK (SP);
1318 PUSHs (&PL_sv_no);
1319 PUSHs (fullname);
1320 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1321 PUTBACK;
1322 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1323 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1324 SPAGAIN;
1325 FREETMPS;
1326 LEAVE;
1327 PL_runops = runops_trace;
1328 }
1329
1330 if (oldcop != PL_curcop)
1331 {
1332 oldcop = PL_curcop;
1333
1334 if (PL_curcop != &PL_compiling)
1335 {
1336 SV **cb;
1337
1338 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1339 {
1340 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1341
1342 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1343 {
1344 dSP;
1345 GV *gv = CvGV (cx->blk_sub.cv);
1346 SV *fullname = sv_2mortal (newSV (0));
1347
1348 if (isGV (gv))
1349 gv_efullname3 (fullname, gv, 0);
1350
1351 PL_runops = RUNOPS_DEFAULT;
1352 ENTER;
1353 SAVETMPS;
1354 EXTEND (SP, 3);
1355 PUSHMARK (SP);
1356 PUSHs (&PL_sv_yes);
1357 PUSHs (fullname);
1358 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1359 PUTBACK;
1360 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1361 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1362 SPAGAIN;
1363 FREETMPS;
1364 LEAVE;
1365 PL_runops = runops_trace;
1366 }
1367
1368 oldcxix = cxstack_ix;
1369 }
1370
1371 if (cctx_current->flags & CC_TRACE_LINE)
1372 {
1373 dSP;
1374
1375 PL_runops = RUNOPS_DEFAULT;
1376 ENTER;
1377 SAVETMPS;
1378 EXTEND (SP, 3);
1379 PL_runops = RUNOPS_DEFAULT;
1380 PUSHMARK (SP);
1381 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1382 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1383 PUTBACK;
1384 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1385 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1386 SPAGAIN;
1387 FREETMPS;
1388 LEAVE;
1389 PL_runops = runops_trace;
1390 }
1391 }
1392 }
1393 }
1394 }
1395
1396 TAINT_NOT;
1397 return 0;
1398}
1399
1400static struct CoroSLF cctx_ssl_frame;
1401
1402static void
1403slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1404{
1405 ta->prev = 0;
1406}
1407
1408static int
1409slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1410{
1411 *frame = cctx_ssl_frame;
1412
1413 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1414}
1415
1416/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1417static void ecb_noinline
1418cctx_prepare (pTHX)
1419{
1420 PL_top_env = &PL_start_env;
1421
1422 if (cctx_current->flags & CC_TRACE)
1423 PL_runops = runops_trace;
1424
1425 /* we already must be executing an SLF op, there is no other valid way
1426 * that can lead to creation of a new cctx */
1427 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1428 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1429
1430 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1431 cctx_ssl_frame = slf_frame;
1432
1433 slf_frame.prepare = slf_prepare_set_stacklevel;
1434 slf_frame.check = slf_check_set_stacklevel;
1435}
1436
1437/* the tail of transfer: execute stuff we can only do after a transfer */
1438ecb_inline void
1439transfer_tail (pTHX)
1440{
1441 free_coro_mortal (aTHX);
1442}
1443
1444/* try to exit the same way perl's main function would do */
1445/* we do not bother resetting the environment or other things *7
1446/* that are not, uhm, essential */
1447/* this obviously also doesn't work when perl is embedded */
1448static void ecb_noinline ecb_cold
1449perlish_exit (pTHX)
1450{
1451 int exitstatus = perl_destruct (PL_curinterp);
1452 perl_free (PL_curinterp);
1453 exit (exitstatus);
1454}
1455
1456/*
1457 * this is a _very_ stripped down perl interpreter ;)
1458 */
1459static void
1460cctx_run (void *arg)
1461{
1462#ifdef USE_ITHREADS
1463# if CORO_PTHREAD
1464 PERL_SET_CONTEXT (coro_thx);
1465# endif
1466#endif
1467 {
1468 dTHX;
1469
1470 /* normally we would need to skip the entersub here */
1471 /* not doing so will re-execute it, which is exactly what we want */
1472 /* PL_nop = PL_nop->op_next */
1473
1474 /* inject a fake subroutine call to cctx_init */
1475 cctx_prepare (aTHX);
1476
1477 /* cctx_run is the alternative tail of transfer() */
1478 transfer_tail (aTHX);
1479
1480 /* somebody or something will hit me for both perl_run and PL_restartop */
1481 PL_restartop = PL_op;
1482 perl_run (PL_curinterp);
1483 /*
1484 * Unfortunately, there is no way to get at the return values of the
1485 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1486 * runtime errors here, as this is just a random interpreter, not a thread.
1487 */
1488
1489 /*
1490 * If perl-run returns we assume exit() was being called or the coro
1491 * fell off the end, which seems to be the only valid (non-bug)
1492 * reason for perl_run to return. We try to mimic whatever perl is normally
1493 * doing in that case. YMMV.
1494 */
1495 perlish_exit (aTHX);
1496 }
1497}
1498
1499static coro_cctx *
1500cctx_new (void)
1501{
1502 coro_cctx *cctx;
1503
1504 ++cctx_count;
1505 New (0, cctx, 1, coro_cctx);
1506
1507 cctx->gen = cctx_gen;
1508 cctx->flags = 0;
1509 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1510
1511 return cctx;
1512}
1513
1514/* create a new cctx only suitable as source */
1515static coro_cctx *
1516cctx_new_empty (void)
1517{
1518 coro_cctx *cctx = cctx_new ();
1519
1520 cctx->stack.sptr = 0;
1521 coro_create (&cctx->cctx, 0, 0, 0, 0);
1522
1523 return cctx;
1524}
1525
1526/* create a new cctx suitable as destination/running a perl interpreter */
1527static coro_cctx *
1528cctx_new_run (void)
1529{
1530 coro_cctx *cctx = cctx_new ();
1531
1532 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
1533 {
1534 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1535 _exit (EXIT_FAILURE);
1536 }
1537
1538 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
1539
1540 return cctx;
1541}
1542
1543static void
1544cctx_destroy (coro_cctx *cctx)
1545{
1546 if (!cctx)
1547 return;
1548
1549 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1550
1551 --cctx_count;
1552 coro_destroy (&cctx->cctx);
1553
1554 coro_stack_free (&cctx->stack);
1555
1556 Safefree (cctx);
1557}
1558
1559/* wether this cctx should be destructed */
1560#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1561
1562static coro_cctx *
1563cctx_get (pTHX)
1564{
1565 while (ecb_expect_true (cctx_first))
1566 {
1567 coro_cctx *cctx = cctx_first;
1568 cctx_first = cctx->next;
1569 --cctx_idle;
1570
1571 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1572 return cctx;
1573
1574 cctx_destroy (cctx);
1575 }
1576
1577 return cctx_new_run ();
1578}
1579
1580static void
1581cctx_put (coro_cctx *cctx)
1582{
1583 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1584
1585 /* free another cctx if overlimit */
1586 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1587 {
1588 coro_cctx *first = cctx_first;
1589 cctx_first = first->next;
1590 --cctx_idle;
1591
1592 cctx_destroy (first);
1593 }
1594
1595 ++cctx_idle;
1596 cctx->next = cctx_first;
1597 cctx_first = cctx;
1598}
1599
1600/** coroutine switching *****************************************************/
1601
1602static void
1603transfer_check (pTHX_ struct coro *prev, struct coro *next)
1604{
1605 /* TODO: throwing up here is considered harmful */
1606
1607 if (ecb_expect_true (prev != next))
1608 {
1609 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1610 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1611
1612 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1613 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1614
1615#if !PERL_VERSION_ATLEAST (5,10,0)
1616 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1617 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1618#endif
1619 }
1620}
1621
1622/* always use the TRANSFER macro */
1623static void ecb_noinline /* noinline so we have a fixed stackframe */
1624transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1625{
1626 dSTACKLEVEL;
1627
1628 /* sometimes transfer is only called to set idle_sp */
1629 if (ecb_expect_false (!prev))
1630 {
1631 cctx_current->idle_sp = STACKLEVEL;
1632 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1633 }
1634 else if (ecb_expect_true (prev != next))
1635 {
1636 coro_cctx *cctx_prev;
1637
1638 if (ecb_expect_false (prev->flags & CF_NEW))
1639 {
1640 /* create a new empty/source context */
1641 prev->flags &= ~CF_NEW;
1642 prev->flags |= CF_RUNNING;
1643 }
1644
1645 prev->flags &= ~CF_RUNNING;
1646 next->flags |= CF_RUNNING;
1647
1648 /* first get rid of the old state */
1649 save_perl (aTHX_ prev);
1650
1651 if (ecb_expect_false (next->flags & CF_NEW))
1652 {
1653 /* need to start coroutine */
1654 next->flags &= ~CF_NEW;
1655 /* setup coroutine call */
1656 init_perl (aTHX_ next);
1657 }
1658 else
1659 load_perl (aTHX_ next);
1660
1661 /* possibly untie and reuse the cctx */
1662 if (ecb_expect_true (
1663 cctx_current->idle_sp == STACKLEVEL
1664 && !(cctx_current->flags & CC_TRACE)
1665 && !force_cctx
1666 ))
1667 {
1668 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1669 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1670
1671 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1672 /* without this the next cctx_get might destroy the running cctx while still in use */
1673 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1674 if (ecb_expect_true (!next->cctx))
1675 next->cctx = cctx_get (aTHX);
1676
1677 cctx_put (cctx_current);
1678 }
1679 else
1680 prev->cctx = cctx_current;
1681
1682 ++next->usecount;
1683
1684 cctx_prev = cctx_current;
1685 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1686
1687 next->cctx = 0;
1688
1689 if (ecb_expect_false (cctx_prev != cctx_current))
1690 {
1691 cctx_prev->top_env = PL_top_env;
1692 PL_top_env = cctx_current->top_env;
1693 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1694 }
1695
1696 transfer_tail (aTHX);
1697 }
1698}
1699
1700#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1701#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1702
1703/** high level stuff ********************************************************/
1704
1705/* this function is actually Coro, not Coro::State, but we call it from here */
1706/* because it is convenient - but it hasn't been declared yet for that reason */
1707static void
1708coro_call_on_destroy (pTHX_ struct coro *coro);
1709
1710static void
1711coro_state_destroy (pTHX_ struct coro *coro)
1712{
1713 if (coro->flags & CF_ZOMBIE)
1714 return;
1715
1716 slf_destroy (aTHX_ coro);
1717
1718 coro->flags |= CF_ZOMBIE;
1719
1720 if (coro->flags & CF_READY)
1721 {
1722 /* reduce nready, as destroying a ready coro effectively unreadies it */
1723 /* alternative: look through all ready queues and remove the coro */
1724 --coro_nready;
1725 }
1726 else
1727 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1728
1729 if (coro->next) coro->next->prev = coro->prev;
1730 if (coro->prev) coro->prev->next = coro->next;
1731 if (coro == coro_first) coro_first = coro->next;
1732
1733 if (coro->mainstack
1734 && coro->mainstack != main_mainstack
1735 && coro->slot
1736 && !PL_dirty)
1737 destroy_perl (aTHX_ coro);
1738
1739 cctx_destroy (coro->cctx);
1740 SvREFCNT_dec (coro->startcv);
1741 SvREFCNT_dec (coro->args);
1742 SvREFCNT_dec (coro->swap_sv);
1743 SvREFCNT_dec (CORO_THROW);
1744
1745 coro_call_on_destroy (aTHX_ coro);
1746
1747 /* more destruction mayhem in coro_state_free */
1748}
1749
1750static int
1751coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1752{
1753 struct coro *coro = (struct coro *)mg->mg_ptr;
1754 mg->mg_ptr = 0;
1755
1756 coro_state_destroy (aTHX_ coro);
1757 SvREFCNT_dec (coro->on_destroy);
1758 SvREFCNT_dec (coro->status);
1759
1760 Safefree (coro);
1761
1762 return 0;
1763}
1764
1765static int ecb_cold
1766coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1767{
1768 /* called when perl clones the current process the slow way (windows process emulation) */
1769 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1770 mg->mg_ptr = 0;
1771 mg->mg_virtual = 0;
1772
1773 return 0;
1774}
1775
1776static MGVTBL coro_state_vtbl = {
1777 0, 0, 0, 0,
1778 coro_state_free,
1779 0,
1780#ifdef MGf_DUP
1781 coro_state_dup,
1782#else
1783# define MGf_DUP 0
1784#endif
1785};
1786
1787static void
1788prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1789{
1790 ta->prev = SvSTATE (prev_sv);
1791 ta->next = SvSTATE (next_sv);
1792 TRANSFER_CHECK (*ta);
1793}
1794
1795static void
1796api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1797{
1798 struct coro_transfer_args ta;
1799
1800 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1801 TRANSFER (ta, 1);
1802}
1803
1804/** Coro ********************************************************************/
1805
1806ecb_inline void
1807coro_enq (pTHX_ struct coro *coro)
1808{
1809 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1810
1811 SvREFCNT_inc_NN (coro->hv);
1812
1813 coro->next_ready = 0;
1814 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1815 ready [1] = coro;
1816}
1817
1818ecb_inline struct coro *
1819coro_deq (pTHX)
1820{
1821 int prio;
1822
1823 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1824 {
1825 struct coro **ready = coro_ready [prio];
1826
1827 if (ready [0])
1828 {
1829 struct coro *coro = ready [0];
1830 ready [0] = coro->next_ready;
1831 return coro;
1832 }
1833 }
1834
1835 return 0;
1836}
1837
1838static void
1839invoke_sv_ready_hook_helper (void)
1840{
601 dTHX; 1841 dTHX;
602 dSP; 1842 dSP;
603 Coro__State ctx = (Coro__State)arg;
604 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605 1843
606 coro_init_stacks (aTHX); 1844 ENTER;
607 /*PL_curcop = 0;*/ 1845 SAVETMPS;
608 /*PL_in_eval = PL_in_eval;*/ /* inherit */
609 SvREFCNT_dec (GvAV (PL_defgv));
610 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611 1846
612 SPAGAIN;
613
614 if (ctx->stack)
615 {
616 ctx->cursp = 0;
617
618 PUSHMARK(SP); 1847 PUSHMARK (SP);
619 PUTBACK; 1848 PUTBACK;
620 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1849 call_sv (coro_readyhook, G_VOID | G_DISCARD);
621 1850
622 if (SvTRUE (ERRSV)) 1851 FREETMPS;
623 croak (NULL); 1852 LEAVE;
624 else 1853}
625 croak ("FATAL: CCTXT coroutine returned!"); 1854
1855static int
1856api_ready (pTHX_ SV *coro_sv)
1857{
1858 struct coro *coro = SvSTATE (coro_sv);
1859
1860 if (coro->flags & CF_READY)
1861 return 0;
1862
1863 coro->flags |= CF_READY;
1864
1865 coro_enq (aTHX_ coro);
1866
1867 if (!coro_nready++)
1868 if (coroapi.readyhook)
1869 coroapi.readyhook ();
1870
1871 return 1;
1872}
1873
1874static int
1875api_is_ready (pTHX_ SV *coro_sv)
1876{
1877 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1878}
1879
1880/* expects to own a reference to next->hv */
1881ecb_inline void
1882prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1883{
1884 SV *prev_sv = SvRV (coro_current);
1885
1886 ta->prev = SvSTATE_hv (prev_sv);
1887 ta->next = next;
1888
1889 TRANSFER_CHECK (*ta);
1890
1891 SvRV_set (coro_current, (SV *)next->hv);
1892
1893 free_coro_mortal (aTHX);
1894 coro_mortal = prev_sv;
1895}
1896
1897static void
1898prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1899{
1900 for (;;)
626 } 1901 {
627 else 1902 struct coro *next = coro_deq (aTHX);
628 {
629 UNOP myop;
630 1903
631 Zero(&myop, 1, UNOP); 1904 if (ecb_expect_true (next))
632 myop.op_next = Nullop;
633 myop.op_flags = OPf_WANT_VOID;
634
635 PL_op = (OP *)&myop;
636
637 PUSHMARK(SP);
638 XPUSHs (sub_init);
639 /*
640 * the next line is slightly wrong, as PL_op->op_next
641 * is actually being executed so we skip the first op.
642 * that doesn't matter, though, since it is only
643 * pp_nextstate and we never return...
644 * ah yes, and I don't care anyways ;)
645 */
646 PUTBACK;
647 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648 SPAGAIN;
649
650 ENTER; /* necessary e.g. for dounwind */
651 }
652}
653
654static void
655continue_coro (void *arg)
656{
657 /*
658 * this is a _very_ stripped down perl interpreter ;)
659 */
660 dTHX;
661 Coro__State ctx = (Coro__State)arg;
662
663 PL_top_env = &PL_start_env;
664
665 ctx->cursp = 0;
666 PL_op = PL_op->op_next;
667 CALLRUNOPS(aTHX);
668
669 abort ();
670}
671
672/* never call directly, always through the coro_state_transfer global variable */
673static void
674transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677
678 if (prev != next)
679 {
680 /* has this coro been created yet? */
681 if (next->mainstack)
682 { 1905 {
683 LOCK; 1906 /* cannot transfer to destroyed coros, skip and look for next */
684 SAVE (prev, flags); 1907 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
685 LOAD (next); 1908 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
686 UNLOCK; 1909 else
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 { 1910 {
695 if (!prev->stack) 1911 next->flags &= ~CF_READY;
696 allocate_stack (prev, 0); 1912 --coro_nready;
697 else if (prev->cursp != stacklevel 1913
698 && prev->stack->usecnt > 1) 1914 prepare_schedule_to (aTHX_ ta, next);
699 { 1915 break;
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 prev->cursp = stacklevel;
716 /* don't add any code here */
717 } 1916 }
718 else
719 next->cursp = stacklevel;
720 } 1917 }
721 else if (next->tmps_ix == -2)
722 croak ("tried to transfer to running coroutine");
723 else 1918 else
724 { 1919 {
725 LOCK; 1920 /* nothing to schedule: call the idle handler */
726 SAVE (prev, -1); /* first get rid of the old state */ 1921 if (SvROK (sv_idle)
727 UNLOCK; 1922 && SvOBJECT (SvRV (sv_idle)))
728
729 /* create the coroutine for the first time */
730 if (flags & TRANSFER_SAVE_CCTXT)
731 { 1923 {
732 if (!prev->stack) 1924 if (SvRV (sv_idle) == SvRV (coro_current))
733 allocate_stack (prev, 0);
734
735 /* the new coroutine starts with start_env again */
736 PL_top_env = &PL_start_env;
737
738 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739 { 1925 {
740 setup_coro (next); 1926 require_pv ("Carp");
741 next->cursp = stacklevel;
742 1927
743 prev->stack->refcnt++; 1928 {
744 prev->stack->usecnt++; 1929 dSP;
745 next->stack = prev->stack; 1930
746 next->gencnt = prev->gencnt; 1931 ENTER;
1932 SAVETMPS;
1933
1934 PUSHMARK (SP);
1935 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1936 PUTBACK;
1937 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1938
1939 FREETMPS;
1940 LEAVE;
1941 }
747 } 1942 }
748 else 1943
749 { 1944 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
750 assert (!next->stack); 1945 api_ready (aTHX_ SvRV (sv_idle));
751 allocate_stack (next, 1); 1946 --coro_nready;
752 coro_create (&(next->stack->cctx),
753 setup_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756 prev->cursp = stacklevel;
757 /* don't add any code here */
758 }
759 } 1947 }
760 else 1948 else
761 { 1949 {
762 setup_coro (next); 1950 /* TODO: deprecated, remove, cannot work reliably *//*D*/
763 next->cursp = stacklevel; 1951 dSP;
1952
1953 ENTER;
1954 SAVETMPS;
1955
1956 PUSHMARK (SP);
1957 PUTBACK;
1958 call_sv (sv_idle, G_VOID | G_DISCARD);
1959
1960 FREETMPS;
1961 LEAVE;
764 } 1962 }
765 } 1963 }
766 } 1964 }
1965}
767 1966
768 LOCK; 1967ecb_inline void
1968prepare_cede (pTHX_ struct coro_transfer_args *ta)
1969{
1970 api_ready (aTHX_ coro_current);
1971 prepare_schedule (aTHX_ ta);
1972}
1973
1974ecb_inline void
1975prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1976{
1977 SV *prev = SvRV (coro_current);
1978
769 if (coro_mortal) 1979 if (coro_nready)
770 {
771 SvREFCNT_dec (coro_mortal);
772 coro_mortal = 0;
773 } 1980 {
774 UNLOCK; 1981 prepare_schedule (aTHX_ ta);
1982 api_ready (aTHX_ prev);
1983 }
1984 else
1985 prepare_nop (aTHX_ ta);
775} 1986}
776 1987
777/* use this function pointer to call the above function */ 1988static void
778/* this is done to increase chances of the compiler not inlining the call */ 1989api_schedule (pTHX)
779void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1990{
1991 struct coro_transfer_args ta;
780 1992
781#define SV_CORO(sv,func) \ 1993 prepare_schedule (aTHX_ &ta);
782 do { \ 1994 TRANSFER (ta, 1);
783 if (SvROK (sv)) \ 1995}
784 sv = SvRV (sv); \
785 \
786 if (SvTYPE (sv) == SVt_PVHV) \
787 { \
788 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789 \
790 if (!he) \
791 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792 \
793 (sv) = SvRV (HeVAL(he)); \
794 } \
795 \
796 /* must also be changed inside Coro::Cont::yield */ \
797 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799 \
800 } while(0)
801 1996
802#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv)) 1997static void
1998api_schedule_to (pTHX_ SV *coro_sv)
1999{
2000 struct coro_transfer_args ta;
2001 struct coro *next = SvSTATE (coro_sv);
803 2002
2003 SvREFCNT_inc_NN (coro_sv);
2004 prepare_schedule_to (aTHX_ &ta, next);
2005}
2006
804static void 2007static int
2008api_cede (pTHX)
2009{
2010 struct coro_transfer_args ta;
2011
2012 prepare_cede (aTHX_ &ta);
2013
2014 if (ecb_expect_true (ta.prev != ta.next))
2015 {
2016 TRANSFER (ta, 1);
2017 return 1;
2018 }
2019 else
2020 return 0;
2021}
2022
2023static int
2024api_cede_notself (pTHX)
2025{
2026 if (coro_nready)
2027 {
2028 struct coro_transfer_args ta;
2029
2030 prepare_cede_notself (aTHX_ &ta);
2031 TRANSFER (ta, 1);
2032 return 1;
2033 }
2034 else
2035 return 0;
2036}
2037
2038static void
805api_transfer (pTHX_ SV *prev, SV *next, int flags) 2039api_trace (pTHX_ SV *coro_sv, int flags)
806{ 2040{
807 SV_CORO (prev, "Coro::transfer"); 2041 struct coro *coro = SvSTATE (coro_sv);
808 SV_CORO (next, "Coro::transfer");
809 2042
810 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2043 if (coro->flags & CF_RUNNING)
811} 2044 croak ("cannot enable tracing on a running coroutine, caught");
812 2045
2046 if (flags & CC_TRACE)
2047 {
2048 if (!coro->cctx)
2049 coro->cctx = cctx_new_run ();
2050 else if (!(coro->cctx->flags & CC_TRACE))
2051 croak ("cannot enable tracing on coroutine with custom stack, caught");
2052
2053 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2054 }
2055 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2056 {
2057 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2058
2059 if (coro->flags & CF_RUNNING)
2060 PL_runops = RUNOPS_DEFAULT;
2061 else
2062 coro->slot->runops = RUNOPS_DEFAULT;
2063 }
2064}
2065
2066static void
2067coro_push_av (pTHX_ AV *av, I32 gimme_v)
2068{
2069 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2070 {
2071 dSP;
2072
2073 if (gimme_v == G_SCALAR)
2074 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2075 else
2076 {
2077 int i;
2078 EXTEND (SP, AvFILLp (av) + 1);
2079
2080 for (i = 0; i <= AvFILLp (av); ++i)
2081 PUSHs (AvARRAY (av)[i]);
2082 }
2083
2084 PUTBACK;
2085 }
2086}
2087
2088static void
2089coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2090{
2091 if (!coro->on_destroy)
2092 coro->on_destroy = newAV ();
2093
2094 av_push (coro->on_destroy, cb);
2095}
2096
2097static void
2098slf_destroy_join (pTHX_ struct CoroSLF *frame)
2099{
2100 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2101}
2102
2103static int
2104slf_check_join (pTHX_ struct CoroSLF *frame)
2105{
2106 struct coro *coro = (struct coro *)frame->data;
2107
2108 if (!coro->status)
2109 return 1;
2110
2111 frame->destroy = 0;
2112
2113 coro_push_av (aTHX_ coro->status, GIMME_V);
2114
2115 SvREFCNT_dec ((SV *)coro->hv);
2116
2117 return 0;
2118}
2119
2120static void
2121slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2122{
2123 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2124
2125 if (items > 1)
2126 croak ("join called with too many arguments");
2127
2128 if (coro->status)
2129 frame->prepare = prepare_nop;
2130 else
2131 {
2132 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2133 frame->prepare = prepare_schedule;
2134 }
2135
2136 frame->check = slf_check_join;
2137 frame->destroy = slf_destroy_join;
2138 frame->data = (void *)coro;
2139 SvREFCNT_inc (coro->hv);
2140}
2141
2142static void
2143coro_call_on_destroy (pTHX_ struct coro *coro)
2144{
2145 AV *od = coro->on_destroy;
2146
2147 if (!od)
2148 return;
2149
2150 coro->on_destroy = 0;
2151 sv_2mortal ((SV *)od);
2152
2153 while (AvFILLp (od) >= 0)
2154 {
2155 SV *cb = sv_2mortal (av_pop (od));
2156
2157 /* coro hv's (and only hv's at the moment) are supported as well */
2158 if (SvSTATEhv_p (aTHX_ cb))
2159 api_ready (aTHX_ cb);
2160 else
2161 {
2162 dSP; /* don't disturb outer sp */
2163 PUSHMARK (SP);
2164
2165 if (coro->status)
2166 {
2167 PUTBACK;
2168 coro_push_av (aTHX_ coro->status, G_ARRAY);
2169 SPAGAIN;
2170 }
2171
2172 PUTBACK;
2173 call_sv (cb, G_VOID | G_DISCARD);
2174 }
2175 }
2176}
2177
2178static void
2179coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2180{
2181 AV *av;
2182
2183 if (coro->status)
2184 {
2185 av = coro->status;
2186 av_clear (av);
2187 }
2188 else
2189 av = coro->status = newAV ();
2190
2191 /* items are actually not so common, so optimise for this case */
2192 if (items)
2193 {
2194 int i;
2195
2196 av_extend (av, items - 1);
2197
2198 for (i = 0; i < items; ++i)
2199 av_push (av, SvREFCNT_inc_NN (arg [i]));
2200 }
2201}
2202
2203static void
2204slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2205{
2206 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2207 api_ready (aTHX_ sv_manager);
2208
2209 frame->prepare = prepare_schedule;
2210 frame->check = slf_check_repeat;
2211
2212 /* as a minor optimisation, we could unwind all stacks here */
2213 /* but that puts extra pressure on pp_slf, and is not worth much */
2214 /*coro_unwind_stacks (aTHX);*/
2215}
2216
2217static void
2218slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2219{
2220 HV *coro_hv = (HV *)SvRV (coro_current);
2221
2222 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2223 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2224}
2225
2226static void
2227slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2228{
2229 HV *coro_hv;
2230 struct coro *coro;
2231
2232 if (items <= 0)
2233 croak ("Coro::cancel called without coro object,");
2234
2235 coro = SvSTATE (arg [0]);
2236 coro_hv = coro->hv;
2237
2238 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2239
2240 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2241 {
2242 /* coro currently busy cancelling something, so just notify it */
2243 coro->slf_frame.data = (void *)coro;
2244
2245 frame->prepare = prepare_nop;
2246 frame->check = slf_check_nop;
2247 }
2248 else if (coro_hv == (HV *)SvRV (coro_current))
2249 {
2250 /* cancelling the current coro is allowed, and equals terminate */
2251 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2252 }
2253 else
2254 {
2255 struct coro *self = SvSTATE_current;
2256
2257 if (!self)
2258 croak ("Coro::cancel called outside of thread content,");
2259
2260 /* otherwise we cancel directly, purely for speed reasons
2261 * unfortunately, this requires some magic trickery, as
2262 * somebody else could cancel us, so we have to fight the cancellation.
2263 * this is ugly, and hopefully fully worth the extra speed.
2264 * besides, I can't get the slow-but-safe version working...
2265 */
2266 slf_frame.data = 0;
2267 self->flags |= CF_NOCANCEL;
2268 coro_state_destroy (aTHX_ coro);
2269 self->flags &= ~CF_NOCANCEL;
2270
2271 if (slf_frame.data)
2272 {
2273 /* while we were busy we have been cancelled, so terminate */
2274 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2275 }
2276 else
2277 {
2278 frame->prepare = prepare_nop;
2279 frame->check = slf_check_nop;
2280 }
2281 }
2282}
2283
2284static int
2285slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2286{
2287 frame->prepare = 0;
2288 coro_unwind_stacks (aTHX);
2289
2290 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2291
2292 return 1;
2293}
2294
2295static int
2296safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2297{
2298 if (coro->cctx)
2299 croak ("coro inside C callback, unable to cancel at this time, caught");
2300
2301 if (coro->flags & CF_NEW)
2302 {
2303 coro_set_status (aTHX_ coro, arg, items);
2304 coro_state_destroy (aTHX_ coro);
2305 }
2306 else
2307 {
2308 if (!coro->slf_frame.prepare)
2309 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2310
2311 slf_destroy (aTHX_ coro);
2312
2313 coro_set_status (aTHX_ coro, arg, items);
2314 coro->slf_frame.prepare = prepare_nop;
2315 coro->slf_frame.check = slf_check_safe_cancel;
2316
2317 api_ready (aTHX_ (SV *)coro->hv);
2318 }
2319
2320 return 1;
2321}
2322
813/** Coro ********************************************************************/ 2323/*****************************************************************************/
2324/* async pool handler */
814 2325
815#define PRIO_MAX 3
816#define PRIO_HIGH 1
817#define PRIO_NORMAL 0
818#define PRIO_LOW -1
819#define PRIO_IDLE -3
820#define PRIO_MIN -4
821
822/* for Coro.pm */
823static GV *coro_current, *coro_idle;
824static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825static int coro_nready;
826
827static void 2326static int
828coro_enq (pTHX_ SV *sv) 2327slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
829{ 2328{
830 SV **xprio; 2329 HV *hv = (HV *)SvRV (coro_current);
831 int prio; 2330 struct coro *coro = (struct coro *)frame->data;
832 2331
2332 if (!coro->invoke_cb)
2333 return 1; /* loop till we have invoke */
2334 else
2335 {
2336 hv_store (hv, "desc", sizeof ("desc") - 1,
2337 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2338
2339 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2340
2341 {
2342 dSP;
2343 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2344 PUTBACK;
2345 }
2346
2347 SvREFCNT_dec (GvAV (PL_defgv));
2348 GvAV (PL_defgv) = coro->invoke_av;
2349 coro->invoke_av = 0;
2350
2351 return 0;
2352 }
2353}
2354
2355static void
2356slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 HV *hv = (HV *)SvRV (coro_current);
2359 struct coro *coro = SvSTATE_hv ((SV *)hv);
2360
2361 if (ecb_expect_true (coro->saved_deffh))
2362 {
2363 /* subsequent iteration */
2364 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2365 coro->saved_deffh = 0;
2366
2367 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2368 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2369 {
2370 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2371 return;
2372 }
2373 else
2374 {
2375 av_clear (GvAV (PL_defgv));
2376 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2377
2378 coro->prio = 0;
2379
2380 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2381 api_trace (aTHX_ coro_current, 0);
2382
2383 frame->prepare = prepare_schedule;
2384 av_push (av_async_pool, SvREFCNT_inc (hv));
2385 }
2386 }
2387 else
2388 {
2389 /* first iteration, simply fall through */
2390 frame->prepare = prepare_nop;
2391 }
2392
2393 frame->check = slf_check_pool_handler;
2394 frame->data = (void *)coro;
2395}
2396
2397/*****************************************************************************/
2398/* rouse callback */
2399
2400#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2401
2402static void
2403coro_rouse_callback (pTHX_ CV *cv)
2404{
2405 dXSARGS;
2406 SV *data = (SV *)S_GENSUB_ARG;
2407
833 if (SvTYPE (sv) != SVt_PVHV) 2408 if (SvTYPE (SvRV (data)) != SVt_PVAV)
834 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2409 {
2410 /* first call, set args */
2411 SV *coro = SvRV (data);
2412 AV *av = newAV ();
835 2413
836 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2414 SvRV_set (data, (SV *)av);
837 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838 2415
839 prio = prio > PRIO_MAX ? PRIO_MAX 2416 /* better take a full copy of the arguments */
840 : prio < PRIO_MIN ? PRIO_MIN 2417 while (items--)
841 : prio; 2418 av_store (av, items, newSVsv (ST (items)));
842 2419
843 av_push (coro_ready [prio - PRIO_MIN], sv); 2420 api_ready (aTHX_ coro);
844 coro_nready++; 2421 SvREFCNT_dec (coro);
2422 }
2423
2424 XSRETURN_EMPTY;
2425}
2426
2427static int
2428slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2429{
2430 SV *data = (SV *)frame->data;
2431
2432 if (CORO_THROW)
2433 return 0;
2434
2435 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2436 return 1;
2437
2438 /* now push all results on the stack */
2439 {
2440 dSP;
2441 AV *av = (AV *)SvRV (data);
2442 int i;
2443
2444 EXTEND (SP, AvFILLp (av) + 1);
2445 for (i = 0; i <= AvFILLp (av); ++i)
2446 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2447
2448 /* we have stolen the elements, so set length to zero and free */
2449 AvFILLp (av) = -1;
2450 av_undef (av);
2451
2452 PUTBACK;
2453 }
2454
2455 return 0;
2456}
2457
2458static void
2459slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2460{
2461 SV *cb;
2462
2463 if (items)
2464 cb = arg [0];
2465 else
2466 {
2467 struct coro *coro = SvSTATE_current;
2468
2469 if (!coro->rouse_cb)
2470 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2471
2472 cb = sv_2mortal (coro->rouse_cb);
2473 coro->rouse_cb = 0;
2474 }
2475
2476 if (!SvROK (cb)
2477 || SvTYPE (SvRV (cb)) != SVt_PVCV
2478 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2479 croak ("Coro::rouse_wait called with illegal callback argument,");
2480
2481 {
2482 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2483 SV *data = (SV *)S_GENSUB_ARG;
2484
2485 frame->data = (void *)data;
2486 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2487 frame->check = slf_check_rouse_wait;
2488 }
845} 2489}
846 2490
847static SV * 2491static SV *
848coro_deq (pTHX_ int min_prio) 2492coro_new_rouse_cb (pTHX)
849{ 2493{
850 int prio = PRIO_MAX - PRIO_MIN; 2494 HV *hv = (HV *)SvRV (coro_current);
2495 struct coro *coro = SvSTATE_hv (hv);
2496 SV *data = newRV_inc ((SV *)hv);
2497 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
851 2498
852 min_prio -= PRIO_MIN; 2499 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
853 if (min_prio < 0) 2500 SvREFCNT_dec (data); /* magicext increases the refcount */
854 min_prio = 0;
855 2501
856 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2502 SvREFCNT_dec (coro->rouse_cb);
857 if (AvFILLp (coro_ready [prio]) >= 0) 2503 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2504
2505 return cb;
2506}
2507
2508/*****************************************************************************/
2509/* schedule-like-function opcode (SLF) */
2510
2511static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2512static const CV *slf_cv;
2513static SV **slf_argv;
2514static int slf_argc, slf_arga; /* count, allocated */
2515static I32 slf_ax; /* top of stack, for restore */
2516
2517/* this restores the stack in the case we patched the entersub, to */
2518/* recreate the stack frame as perl will on following calls */
2519/* since entersub cleared the stack */
2520static OP *
2521pp_restore (pTHX)
2522{
2523 int i;
2524 SV **SP = PL_stack_base + slf_ax;
2525
2526 PUSHMARK (SP);
2527
2528 EXTEND (SP, slf_argc + 1);
2529
2530 for (i = 0; i < slf_argc; ++i)
2531 PUSHs (sv_2mortal (slf_argv [i]));
2532
2533 PUSHs ((SV *)CvGV (slf_cv));
2534
2535 RETURNOP (slf_restore.op_first);
2536}
2537
2538static void
2539slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2540{
2541 SV **arg = (SV **)slf_frame.data;
2542
2543 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2544}
2545
2546static void
2547slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2548{
2549 if (items != 2)
2550 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2551
2552 frame->prepare = slf_prepare_transfer;
2553 frame->check = slf_check_nop;
2554 frame->data = (void *)arg; /* let's hope it will stay valid */
2555}
2556
2557static void
2558slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2559{
2560 frame->prepare = prepare_schedule;
2561 frame->check = slf_check_nop;
2562}
2563
2564static void
2565slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2566{
2567 struct coro *next = (struct coro *)slf_frame.data;
2568
2569 SvREFCNT_inc_NN (next->hv);
2570 prepare_schedule_to (aTHX_ ta, next);
2571}
2572
2573static void
2574slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2575{
2576 if (!items)
2577 croak ("Coro::schedule_to expects a coroutine argument, caught");
2578
2579 frame->data = (void *)SvSTATE (arg [0]);
2580 frame->prepare = slf_prepare_schedule_to;
2581 frame->check = slf_check_nop;
2582}
2583
2584static void
2585slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2586{
2587 api_ready (aTHX_ SvRV (coro_current));
2588
2589 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2590}
2591
2592static void
2593slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2594{
2595 frame->prepare = prepare_cede;
2596 frame->check = slf_check_nop;
2597}
2598
2599static void
2600slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2601{
2602 frame->prepare = prepare_cede_notself;
2603 frame->check = slf_check_nop;
2604}
2605
2606/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2607static void
2608slf_destroy (pTHX_ struct coro *coro)
2609{
2610 struct CoroSLF frame = coro->slf_frame;
2611
2612 /*
2613 * The on_destroy below most likely is from an SLF call.
2614 * Since by definition the SLF call will not finish when we destroy
2615 * the coro, we will have to force-finish it here, otherwise
2616 * cleanup functions cannot call SLF functions.
2617 */
2618 coro->slf_frame.prepare = 0;
2619
2620 /* this callback is reserved for slf functions needing to do cleanup */
2621 if (frame.destroy && frame.prepare && !PL_dirty)
2622 frame.destroy (aTHX_ &frame);
2623}
2624
2625/*
2626 * these not obviously related functions are all rolled into one
2627 * function to increase chances that they all will call transfer with the same
2628 * stack offset
2629 * SLF stands for "schedule-like-function".
2630 */
2631static OP *
2632pp_slf (pTHX)
2633{
2634 I32 checkmark; /* mark SP to see how many elements check has pushed */
2635
2636 /* set up the slf frame, unless it has already been set-up */
2637 /* the latter happens when a new coro has been started */
2638 /* or when a new cctx was attached to an existing coroutine */
2639 if (ecb_expect_true (!slf_frame.prepare))
2640 {
2641 /* first iteration */
2642 dSP;
2643 SV **arg = PL_stack_base + TOPMARK + 1;
2644 int items = SP - arg; /* args without function object */
2645 SV *gv = *sp;
2646
2647 /* do a quick consistency check on the "function" object, and if it isn't */
2648 /* for us, divert to the real entersub */
2649 if (SvTYPE (gv) != SVt_PVGV
2650 || !GvCV (gv)
2651 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2652 return PL_ppaddr[OP_ENTERSUB](aTHX);
2653
2654 if (!(PL_op->op_flags & OPf_STACKED))
858 { 2655 {
859 coro_nready--; 2656 /* ampersand-form of call, use @_ instead of stack */
860 return av_shift (coro_ready [prio]); 2657 AV *av = GvAV (PL_defgv);
2658 arg = AvARRAY (av);
2659 items = AvFILLp (av) + 1;
861 } 2660 }
2661
2662 /* now call the init function, which needs to set up slf_frame */
2663 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2664 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2665
2666 /* pop args */
2667 SP = PL_stack_base + POPMARK;
2668
2669 PUTBACK;
2670 }
2671
2672 /* now that we have a slf_frame, interpret it! */
2673 /* we use a callback system not to make the code needlessly */
2674 /* complicated, but so we can run multiple perl coros from one cctx */
2675
2676 do
2677 {
2678 struct coro_transfer_args ta;
2679
2680 slf_frame.prepare (aTHX_ &ta);
2681 TRANSFER (ta, 0);
2682
2683 checkmark = PL_stack_sp - PL_stack_base;
2684 }
2685 while (slf_frame.check (aTHX_ &slf_frame));
2686
2687 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2688
2689 /* exception handling */
2690 if (ecb_expect_false (CORO_THROW))
2691 {
2692 SV *exception = sv_2mortal (CORO_THROW);
2693
2694 CORO_THROW = 0;
2695 sv_setsv (ERRSV, exception);
2696 croak (0);
2697 }
2698
2699 /* return value handling - mostly like entersub */
2700 /* make sure we put something on the stack in scalar context */
2701 if (GIMME_V == G_SCALAR
2702 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2703 {
2704 dSP;
2705 SV **bot = PL_stack_base + checkmark;
2706
2707 if (sp == bot) /* too few, push undef */
2708 bot [1] = &PL_sv_undef;
2709 else /* too many, take last one */
2710 bot [1] = *sp;
2711
2712 SP = bot + 1;
2713
2714 PUTBACK;
2715 }
2716
2717 return NORMAL;
2718}
2719
2720static void
2721api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2722{
2723 int i;
2724 SV **arg = PL_stack_base + ax;
2725 int items = PL_stack_sp - arg + 1;
2726
2727 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2728
2729 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2730 && PL_op->op_ppaddr != pp_slf)
2731 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2732
2733 CvFLAGS (cv) |= CVf_SLF;
2734 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2735 slf_cv = cv;
2736
2737 /* we patch the op, and then re-run the whole call */
2738 /* we have to put the same argument on the stack for this to work */
2739 /* and this will be done by pp_restore */
2740 slf_restore.op_next = (OP *)&slf_restore;
2741 slf_restore.op_type = OP_CUSTOM;
2742 slf_restore.op_ppaddr = pp_restore;
2743 slf_restore.op_first = PL_op;
2744
2745 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2746
2747 if (PL_op->op_flags & OPf_STACKED)
2748 {
2749 if (items > slf_arga)
2750 {
2751 slf_arga = items;
2752 Safefree (slf_argv);
2753 New (0, slf_argv, slf_arga, SV *);
2754 }
2755
2756 slf_argc = items;
2757
2758 for (i = 0; i < items; ++i)
2759 slf_argv [i] = SvREFCNT_inc (arg [i]);
2760 }
2761 else
2762 slf_argc = 0;
2763
2764 PL_op->op_ppaddr = pp_slf;
2765 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2766
2767 PL_op = (OP *)&slf_restore;
2768}
2769
2770/*****************************************************************************/
2771/* dynamic wind */
2772
2773static void
2774on_enterleave_call (pTHX_ SV *cb)
2775{
2776 dSP;
2777
2778 PUSHSTACK;
2779
2780 PUSHMARK (SP);
2781 PUTBACK;
2782 call_sv (cb, G_VOID | G_DISCARD);
2783 SPAGAIN;
2784
2785 POPSTACK;
2786}
2787
2788static SV *
2789coro_avp_pop_and_free (pTHX_ AV **avp)
2790{
2791 AV *av = *avp;
2792 SV *res = av_pop (av);
2793
2794 if (AvFILLp (av) < 0)
2795 {
2796 *avp = 0;
2797 SvREFCNT_dec (av);
2798 }
2799
2800 return res;
2801}
2802
2803static void
2804coro_pop_on_enter (pTHX_ void *coro)
2805{
2806 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2807 SvREFCNT_dec (cb);
2808}
2809
2810static void
2811coro_pop_on_leave (pTHX_ void *coro)
2812{
2813 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2814 on_enterleave_call (aTHX_ sv_2mortal (cb));
2815}
2816
2817/*****************************************************************************/
2818/* PerlIO::cede */
2819
2820typedef struct
2821{
2822 PerlIOBuf base;
2823 NV next, every;
2824} PerlIOCede;
2825
2826static IV ecb_cold
2827PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2828{
2829 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2830
2831 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2832 self->next = nvtime () + self->every;
2833
2834 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2835}
2836
2837static SV * ecb_cold
2838PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2839{
2840 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2841
2842 return newSVnv (self->every);
2843}
2844
2845static IV
2846PerlIOCede_flush (pTHX_ PerlIO *f)
2847{
2848 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2849 double now = nvtime ();
2850
2851 if (now >= self->next)
2852 {
2853 api_cede (aTHX);
2854 self->next = now + self->every;
2855 }
2856
2857 return PerlIOBuf_flush (aTHX_ f);
2858}
2859
2860static PerlIO_funcs PerlIO_cede =
2861{
2862 sizeof(PerlIO_funcs),
2863 "cede",
2864 sizeof(PerlIOCede),
2865 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2866 PerlIOCede_pushed,
2867 PerlIOBuf_popped,
2868 PerlIOBuf_open,
2869 PerlIOBase_binmode,
2870 PerlIOCede_getarg,
2871 PerlIOBase_fileno,
2872 PerlIOBuf_dup,
2873 PerlIOBuf_read,
2874 PerlIOBuf_unread,
2875 PerlIOBuf_write,
2876 PerlIOBuf_seek,
2877 PerlIOBuf_tell,
2878 PerlIOBuf_close,
2879 PerlIOCede_flush,
2880 PerlIOBuf_fill,
2881 PerlIOBase_eof,
2882 PerlIOBase_error,
2883 PerlIOBase_clearerr,
2884 PerlIOBase_setlinebuf,
2885 PerlIOBuf_get_base,
2886 PerlIOBuf_bufsiz,
2887 PerlIOBuf_get_ptr,
2888 PerlIOBuf_get_cnt,
2889 PerlIOBuf_set_ptrcnt,
2890};
2891
2892/*****************************************************************************/
2893/* Coro::Semaphore & Coro::Signal */
2894
2895static SV *
2896coro_waitarray_new (pTHX_ int count)
2897{
2898 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2899 AV *av = newAV ();
2900 SV **ary;
2901
2902 /* unfortunately, building manually saves memory */
2903 Newx (ary, 2, SV *);
2904 AvALLOC (av) = ary;
2905#if PERL_VERSION_ATLEAST (5,10,0)
2906 AvARRAY (av) = ary;
2907#else
2908 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2909 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2910 SvPVX ((SV *)av) = (char *)ary;
2911#endif
2912 AvMAX (av) = 1;
2913 AvFILLp (av) = 0;
2914 ary [0] = newSViv (count);
2915
2916 return newRV_noinc ((SV *)av);
2917}
2918
2919/* semaphore */
2920
2921static void
2922coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2923{
2924 SV *count_sv = AvARRAY (av)[0];
2925 IV count = SvIVX (count_sv);
2926
2927 count += adjust;
2928 SvIVX (count_sv) = count;
2929
2930 /* now wake up as many waiters as are expected to lock */
2931 while (count > 0 && AvFILLp (av) > 0)
2932 {
2933 SV *cb;
2934
2935 /* swap first two elements so we can shift a waiter */
2936 AvARRAY (av)[0] = AvARRAY (av)[1];
2937 AvARRAY (av)[1] = count_sv;
2938 cb = av_shift (av);
2939
2940 if (SvOBJECT (cb))
2941 {
2942 api_ready (aTHX_ cb);
2943 --count;
2944 }
2945 else if (SvTYPE (cb) == SVt_PVCV)
2946 {
2947 dSP;
2948 PUSHMARK (SP);
2949 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2950 PUTBACK;
2951 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2952 }
2953
2954 SvREFCNT_dec (cb);
2955 }
2956}
2957
2958static void
2959coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2960{
2961 /* call $sem->adjust (0) to possibly wake up some other waiters */
2962 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2963}
2964
2965static int
2966slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2967{
2968 AV *av = (AV *)frame->data;
2969 SV *count_sv = AvARRAY (av)[0];
2970 SV *coro_hv = SvRV (coro_current);
2971
2972 frame->destroy = 0;
2973
2974 /* if we are about to throw, don't actually acquire the lock, just throw */
2975 if (ecb_expect_false (CORO_THROW))
2976 {
2977 /* we still might be responsible for the semaphore, so wake up others */
2978 coro_semaphore_adjust (aTHX_ av, 0);
2979
2980 return 0;
2981 }
2982 else if (SvIVX (count_sv) > 0)
2983 {
2984 if (acquire)
2985 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2986 else
2987 coro_semaphore_adjust (aTHX_ av, 0);
2988
2989 return 0;
2990 }
2991 else
2992 {
2993 int i;
2994 /* if we were woken up but can't down, we look through the whole */
2995 /* waiters list and only add us if we aren't in there already */
2996 /* this avoids some degenerate memory usage cases */
2997 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2998 if (AvARRAY (av)[i] == coro_hv)
2999 return 1;
3000
3001 av_push (av, SvREFCNT_inc (coro_hv));
3002 return 1;
3003 }
3004}
3005
3006static int
3007slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3008{
3009 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3010}
3011
3012static int
3013slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3014{
3015 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3016}
3017
3018static void
3019slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3020{
3021 AV *av = (AV *)SvRV (arg [0]);
3022
3023 if (SvIVX (AvARRAY (av)[0]) > 0)
3024 {
3025 frame->data = (void *)av;
3026 frame->prepare = prepare_nop;
3027 }
3028 else
3029 {
3030 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3031
3032 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3033 frame->prepare = prepare_schedule;
3034 /* to avoid race conditions when a woken-up coro gets terminated */
3035 /* we arrange for a temporary on_destroy that calls adjust (0) */
3036 frame->destroy = coro_semaphore_destroy;
3037 }
3038}
3039
3040static void
3041slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3042{
3043 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3044 frame->check = slf_check_semaphore_down;
3045}
3046
3047static void
3048slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3049{
3050 if (items >= 2)
3051 {
3052 /* callback form */
3053 AV *av = (AV *)SvRV (arg [0]);
3054 SV *cb_cv = s_get_cv_croak (arg [1]);
3055
3056 av_push (av, SvREFCNT_inc_NN (cb_cv));
3057
3058 if (SvIVX (AvARRAY (av)[0]) > 0)
3059 coro_semaphore_adjust (aTHX_ av, 0);
3060
3061 frame->prepare = prepare_nop;
3062 frame->check = slf_check_nop;
3063 }
3064 else
3065 {
3066 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3067 frame->check = slf_check_semaphore_wait;
3068 }
3069}
3070
3071/* signal */
3072
3073static void
3074coro_signal_wake (pTHX_ AV *av, int count)
3075{
3076 SvIVX (AvARRAY (av)[0]) = 0;
3077
3078 /* now signal count waiters */
3079 while (count > 0 && AvFILLp (av) > 0)
3080 {
3081 SV *cb;
3082
3083 /* swap first two elements so we can shift a waiter */
3084 cb = AvARRAY (av)[0];
3085 AvARRAY (av)[0] = AvARRAY (av)[1];
3086 AvARRAY (av)[1] = cb;
3087
3088 cb = av_shift (av);
3089
3090 if (SvTYPE (cb) == SVt_PVCV)
3091 {
3092 dSP;
3093 PUSHMARK (SP);
3094 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3095 PUTBACK;
3096 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3097 }
3098 else
3099 {
3100 api_ready (aTHX_ cb);
3101 sv_setiv (cb, 0); /* signal waiter */
3102 }
3103
3104 SvREFCNT_dec (cb);
3105
3106 --count;
3107 }
3108}
3109
3110static int
3111slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3112{
3113 /* if we are about to throw, also stop waiting */
3114 return SvROK ((SV *)frame->data) && !CORO_THROW;
3115}
3116
3117static void
3118slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3119{
3120 AV *av = (AV *)SvRV (arg [0]);
3121
3122 if (items >= 2)
3123 {
3124 SV *cb_cv = s_get_cv_croak (arg [1]);
3125 av_push (av, SvREFCNT_inc_NN (cb_cv));
3126
3127 if (SvIVX (AvARRAY (av)[0]))
3128 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3129
3130 frame->prepare = prepare_nop;
3131 frame->check = slf_check_nop;
3132 }
3133 else if (SvIVX (AvARRAY (av)[0]))
3134 {
3135 SvIVX (AvARRAY (av)[0]) = 0;
3136 frame->prepare = prepare_nop;
3137 frame->check = slf_check_nop;
3138 }
3139 else
3140 {
3141 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3142
3143 av_push (av, waiter);
3144
3145 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3146 frame->prepare = prepare_schedule;
3147 frame->check = slf_check_signal_wait;
3148 }
3149}
3150
3151/*****************************************************************************/
3152/* Coro::AIO */
3153
3154#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3155
3156/* helper storage struct */
3157struct io_state
3158{
3159 int errorno;
3160 I32 laststype; /* U16 in 5.10.0 */
3161 int laststatval;
3162 Stat_t statcache;
3163};
3164
3165static void
3166coro_aio_callback (pTHX_ CV *cv)
3167{
3168 dXSARGS;
3169 AV *state = (AV *)S_GENSUB_ARG;
3170 SV *coro = av_pop (state);
3171 SV *data_sv = newSV (sizeof (struct io_state));
3172
3173 av_extend (state, items - 1);
3174
3175 sv_upgrade (data_sv, SVt_PV);
3176 SvCUR_set (data_sv, sizeof (struct io_state));
3177 SvPOK_only (data_sv);
3178
3179 {
3180 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3181
3182 data->errorno = errno;
3183 data->laststype = PL_laststype;
3184 data->laststatval = PL_laststatval;
3185 data->statcache = PL_statcache;
3186 }
3187
3188 /* now build the result vector out of all the parameters and the data_sv */
3189 {
3190 int i;
3191
3192 for (i = 0; i < items; ++i)
3193 av_push (state, SvREFCNT_inc_NN (ST (i)));
3194 }
3195
3196 av_push (state, data_sv);
3197
3198 api_ready (aTHX_ coro);
3199 SvREFCNT_dec (coro);
3200 SvREFCNT_dec ((AV *)state);
3201}
3202
3203static int
3204slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3205{
3206 AV *state = (AV *)frame->data;
3207
3208 /* if we are about to throw, return early */
3209 /* this does not cancel the aio request, but at least */
3210 /* it quickly returns */
3211 if (CORO_THROW)
3212 return 0;
3213
3214 /* one element that is an RV? repeat! */
3215 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3216 return 1;
3217
3218 /* restore status */
3219 {
3220 SV *data_sv = av_pop (state);
3221 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3222
3223 errno = data->errorno;
3224 PL_laststype = data->laststype;
3225 PL_laststatval = data->laststatval;
3226 PL_statcache = data->statcache;
3227
3228 SvREFCNT_dec (data_sv);
3229 }
3230
3231 /* push result values */
3232 {
3233 dSP;
3234 int i;
3235
3236 EXTEND (SP, AvFILLp (state) + 1);
3237 for (i = 0; i <= AvFILLp (state); ++i)
3238 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3239
3240 PUTBACK;
3241 }
862 3242
863 return 0; 3243 return 0;
864} 3244}
865 3245
866static void 3246static void
867api_ready (SV *coro) 3247slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
868{ 3248{
869 dTHX; 3249 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
870
871 if (SvROK (coro))
872 coro = SvRV (coro);
873
874 LOCK;
875 coro_enq (aTHX_ SvREFCNT_inc (coro));
876 UNLOCK;
877}
878
879static void
880api_schedule (void)
881{
882 dTHX;
883
884 SV *prev, *next;
885
886 LOCK;
887
888 prev = SvRV (GvSV (coro_current)); 3250 SV *coro_hv = SvRV (coro_current);
889 next = coro_deq (aTHX_ PRIO_MIN); 3251 struct coro *coro = SvSTATE_hv (coro_hv);
890 3252
891 if (!next) 3253 /* put our coroutine id on the state arg */
892 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3254 av_push (state, SvREFCNT_inc_NN (coro_hv));
893 3255
894 /* free this only after the transfer */ 3256 /* first see whether we have a non-zero priority and set it as AIO prio */
895 coro_mortal = prev; 3257 if (coro->prio)
896 SV_CORO (prev, "Coro::schedule"); 3258 {
3259 dSP;
897 3260
898 SvRV (GvSV (coro_current)) = next; 3261 static SV *prio_cv;
3262 static SV *prio_sv;
899 3263
900 SV_CORO (next, "Coro::schedule"); 3264 if (ecb_expect_false (!prio_cv))
3265 {
3266 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3267 prio_sv = newSViv (0);
3268 }
901 3269
902 UNLOCK; 3270 PUSHMARK (SP);
3271 sv_setiv (prio_sv, coro->prio);
3272 XPUSHs (prio_sv);
903 3273
904 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3274 PUTBACK;
905 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3275 call_sv (prio_cv, G_VOID | G_DISCARD);
906} 3276 }
907 3277
908static void 3278 /* now call the original request */
909api_cede (void) 3279 {
910{ 3280 dSP;
911 dTHX; 3281 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3282 int i;
912 3283
913 LOCK; 3284 PUSHMARK (SP);
914 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
915 UNLOCK;
916 3285
917 api_schedule (); 3286 /* first push all args to the stack */
918} 3287 EXTEND (SP, items + 1);
919 3288
3289 for (i = 0; i < items; ++i)
3290 PUSHs (arg [i]);
3291
3292 /* now push the callback closure */
3293 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3294
3295 /* now call the AIO function - we assume our request is uncancelable */
3296 PUTBACK;
3297 call_sv ((SV *)req, G_VOID | G_DISCARD);
3298 }
3299
3300 /* now that the request is going, we loop till we have a result */
3301 frame->data = (void *)state;
3302 frame->prepare = prepare_schedule;
3303 frame->check = slf_check_aio_req;
3304}
3305
3306static void
3307coro_aio_req_xs (pTHX_ CV *cv)
3308{
3309 dXSARGS;
3310
3311 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3312
3313 XSRETURN_EMPTY;
3314}
3315
3316/*****************************************************************************/
3317
3318#if CORO_CLONE
3319# include "clone.c"
3320#endif
3321
3322/*****************************************************************************/
3323
3324static SV *
3325coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3326{
3327 SV *coro_sv;
3328 struct coro *coro;
3329 MAGIC *mg;
3330 HV *hv;
3331 SV *cb;
3332 int i;
3333
3334 if (argc > 0)
3335 {
3336 cb = s_get_cv_croak (argv [0]);
3337
3338 if (!is_coro)
3339 {
3340 if (CvISXSUB (cb))
3341 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3342
3343 if (!CvROOT (cb))
3344 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3345 }
3346 }
3347
3348 Newz (0, coro, 1, struct coro);
3349 coro->args = newAV ();
3350 coro->flags = CF_NEW;
3351
3352 if (coro_first) coro_first->prev = coro;
3353 coro->next = coro_first;
3354 coro_first = coro;
3355
3356 coro->hv = hv = newHV ();
3357 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3358 mg->mg_flags |= MGf_DUP;
3359 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3360
3361 if (argc > 0)
3362 {
3363 av_extend (coro->args, argc + is_coro - 1);
3364
3365 if (is_coro)
3366 {
3367 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3368 cb = (SV *)cv_coro_run;
3369 }
3370
3371 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3372
3373 for (i = 1; i < argc; i++)
3374 av_push (coro->args, newSVsv (argv [i]));
3375 }
3376
3377 return coro_sv;
3378}
3379
3380#ifndef __cplusplus
3381ecb_cold XS(boot_Coro__State);
3382#endif
3383
3384#if CORO_JIT
3385
3386static void ecb_noinline ecb_cold
3387pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3388{
3389 dSP;
3390 AV *av = newAV ();
3391
3392 av_store (av, 3, newSVuv (d));
3393 av_store (av, 2, newSVuv (c));
3394 av_store (av, 1, newSVuv (b));
3395 av_store (av, 0, newSVuv (a));
3396
3397 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3398
3399 PUTBACK;
3400}
3401
3402static void ecb_noinline ecb_cold
3403jit_init (pTHX)
3404{
3405 dSP;
3406 SV *load, *save;
3407 char *map_base;
3408 char *load_ptr, *save_ptr;
3409 STRLEN load_len, save_len, map_len;
3410 int count;
3411
3412 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3413
3414 PUSHMARK (SP);
3415 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3416 #include "state.h"
3417 count = call_pv ("Coro::State::_jit", G_ARRAY);
3418 SPAGAIN;
3419
3420 save = POPs; save_ptr = SvPVbyte (save, save_len);
3421 load = POPs; load_ptr = SvPVbyte (load, load_len);
3422
3423 map_len = load_len + save_len + 16;
3424
3425 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3426
3427 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3428
3429 load_perl_slots = (load_save_perl_slots_type)map_base;
3430 memcpy (map_base, load_ptr, load_len);
3431
3432 map_base += (load_len + 15) & ~15;
3433
3434 save_perl_slots = (load_save_perl_slots_type)map_base;
3435 memcpy (map_base, save_ptr, save_len);
3436
3437 /* we are good citizens and try to make the page read-only, so the evil evil */
3438 /* hackers might have it a bit more difficult */
3439 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3440
3441 PUTBACK;
3442 eval_pv ("undef &Coro::State::_jit", 1);
3443}
3444
3445#endif
3446
920MODULE = Coro::State PACKAGE = Coro::State 3447MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
921 3448
922PROTOTYPES: ENABLE 3449PROTOTYPES: DISABLE
923 3450
924BOOT: 3451BOOT:
925{ /* {} necessary for stoopid perl-5.6.x */ 3452{
3453#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3454#include "state.h"
926#ifdef USE_ITHREADS 3455#ifdef USE_ITHREADS
927 MUTEX_INIT (&coro_mutex); 3456# if CORO_PTHREAD
3457 coro_thx = PERL_GET_CONTEXT;
928#endif 3458# endif
929 BOOT_PAGESIZE; 3459#endif
3460 /* perl defines these to check for existance first, but why it doesn't */
3461 /* just create them one at init time is not clear to me, except for */
3462 /* programs trying to delete them, but... */
3463 /* anyway, we declare this as invalid and make sure they are initialised here */
3464 DEFSV;
3465 ERRSV;
930 3466
931 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3467 cctx_current = cctx_new_empty ();
932 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3468
3469 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3470 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3471
3472 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3473 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3474 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3475
3476 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3477 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3478 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3479
933 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3480 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934 3481
935 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3482 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
936 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3483 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
937 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3484 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
938 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3485 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
939 3486
940 main_mainstack = PL_mainstack; 3487 main_mainstack = PL_mainstack;
3488 main_top_env = PL_top_env;
941 3489
3490 while (main_top_env->je_prev)
3491 main_top_env = main_top_env->je_prev;
3492
3493 {
3494 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3495
3496 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3497 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3498
3499 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3500 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3501 }
3502
942 coroapi.ver = CORO_API_VERSION; 3503 coroapi.ver = CORO_API_VERSION;
3504 coroapi.rev = CORO_API_REVISION;
3505
943 coroapi.transfer = api_transfer; 3506 coroapi.transfer = api_transfer;
944}
945 3507
946Coro::State 3508 coroapi.sv_state = SvSTATE_;
3509 coroapi.execute_slf = api_execute_slf;
3510 coroapi.prepare_nop = prepare_nop;
3511 coroapi.prepare_schedule = prepare_schedule;
3512 coroapi.prepare_cede = prepare_cede;
3513 coroapi.prepare_cede_notself = prepare_cede_notself;
3514
3515 time_init (aTHX);
3516
3517 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3518#if CORO_JIT
3519 PUTBACK;
3520 jit_init (aTHX);
3521 SPAGAIN;
3522#endif
3523}
3524
3525SV *
947new (char *klass, ...) 3526new (SV *klass, ...)
948 PROTOTYPE: $@ 3527 ALIAS:
3528 Coro::new = 1
949 CODE: 3529 CODE:
950{ 3530 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
951 Coro__State coro; 3531 OUTPUT:
952 int i; 3532 RETVAL
953 3533
954 if (!SvOK (ST (1))) 3534void
955 croak ("Coro::State::new needs something callable as first argument"); 3535transfer (...)
3536 PROTOTYPE: $$
3537 CODE:
3538 CORO_EXECUTE_SLF_XS (slf_init_transfer);
956 3539
957 Newz (0, coro, 1, struct coro); 3540SV *
3541clone (Coro::State coro)
3542 CODE:
3543{
3544#if CORO_CLONE
3545 struct coro *ncoro = coro_clone (aTHX_ coro);
3546 MAGIC *mg;
3547 /* TODO: too much duplication */
958 coro->args = newAV (); 3548 ncoro->hv = newHV ();
3549 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3550 mg->mg_flags |= MGf_DUP;
3551 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3552#else
3553 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3554#endif
3555}
3556 OUTPUT:
3557 RETVAL
959 3558
960 for (i = 1; i < items; i++) 3559int
961 av_push (coro->args, newSVsv (ST (i))); 3560cctx_stacksize (int new_stacksize = 0)
3561 PROTOTYPE: ;$
3562 CODE:
3563 RETVAL = cctx_stacksize;
3564 if (new_stacksize)
3565 {
3566 cctx_stacksize = new_stacksize;
3567 ++cctx_gen;
3568 }
3569 OUTPUT:
3570 RETVAL
962 3571
3572int
3573cctx_max_idle (int max_idle = 0)
3574 PROTOTYPE: ;$
3575 CODE:
3576 RETVAL = cctx_max_idle;
3577 if (max_idle > 1)
3578 cctx_max_idle = max_idle;
3579 OUTPUT:
3580 RETVAL
3581
3582int
3583cctx_count ()
3584 PROTOTYPE:
3585 CODE:
963 RETVAL = coro; 3586 RETVAL = cctx_count;
3587 OUTPUT:
3588 RETVAL
964 3589
965 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3590int
966 /*coro->stack = 0;*/ 3591cctx_idle ()
3592 PROTOTYPE:
3593 CODE:
3594 RETVAL = cctx_idle;
3595 OUTPUT:
3596 RETVAL
3597
3598void
3599list ()
3600 PROTOTYPE:
3601 PPCODE:
3602{
3603 struct coro *coro;
3604 for (coro = coro_first; coro; coro = coro->next)
3605 if (coro->hv)
3606 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3607}
3608
3609void
3610call (Coro::State coro, SV *coderef)
3611 ALIAS:
3612 eval = 1
3613 CODE:
3614{
3615 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3616 {
3617 struct coro *current = SvSTATE_current;
3618 struct CoroSLF slf_save;
3619
3620 if (current != coro)
3621 {
3622 PUTBACK;
3623 save_perl (aTHX_ current);
3624 load_perl (aTHX_ coro);
3625 /* the coro is most likely in an active SLF call.
3626 * while not strictly required (the code we execute is
3627 * not allowed to call any SLF functions), it's cleaner
3628 * to reinitialise the slf_frame and restore it later.
3629 * This might one day allow us to actually do SLF calls
3630 * from code executed here.
3631 */
3632 slf_save = slf_frame;
3633 slf_frame.prepare = 0;
3634 SPAGAIN;
3635 }
3636
3637 PUSHSTACK;
3638
3639 PUSHMARK (SP);
3640 PUTBACK;
3641
3642 if (ix)
3643 eval_sv (coderef, 0);
3644 else
3645 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3646
3647 POPSTACK;
3648 SPAGAIN;
3649
3650 if (current != coro)
3651 {
3652 PUTBACK;
3653 slf_frame = slf_save;
3654 save_perl (aTHX_ coro);
3655 load_perl (aTHX_ current);
3656 SPAGAIN;
3657 }
3658 }
3659}
3660
3661SV *
3662is_ready (Coro::State coro)
3663 PROTOTYPE: $
3664 ALIAS:
3665 is_ready = CF_READY
3666 is_running = CF_RUNNING
3667 is_new = CF_NEW
3668 is_destroyed = CF_ZOMBIE
3669 is_zombie = CF_ZOMBIE
3670 is_suspended = CF_SUSPENDED
3671 CODE:
3672 RETVAL = boolSV (coro->flags & ix);
3673 OUTPUT:
3674 RETVAL
3675
3676void
3677throw (SV *self, SV *exception = &PL_sv_undef)
3678 PROTOTYPE: $;$
3679 CODE:
3680{
3681 struct coro *coro = SvSTATE (self);
3682 struct coro *current = SvSTATE_current;
3683 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3684 SvREFCNT_dec (*exceptionp);
3685 SvGETMAGIC (exception);
3686 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3687
3688 api_ready (aTHX_ self);
3689}
3690
3691void
3692api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3693 PROTOTYPE: $;$
3694 C_ARGS: aTHX_ coro, flags
3695
3696SV *
3697has_cctx (Coro::State coro)
3698 PROTOTYPE: $
3699 CODE:
3700 /* maybe manage the running flag differently */
3701 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3702 OUTPUT:
3703 RETVAL
3704
3705int
3706is_traced (Coro::State coro)
3707 PROTOTYPE: $
3708 CODE:
3709 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3710 OUTPUT:
3711 RETVAL
3712
3713UV
3714rss (Coro::State coro)
3715 PROTOTYPE: $
3716 ALIAS:
3717 usecount = 1
3718 CODE:
3719 switch (ix)
3720 {
3721 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3722 case 1: RETVAL = coro->usecount; break;
3723 }
3724 OUTPUT:
3725 RETVAL
3726
3727void
3728force_cctx ()
3729 PROTOTYPE:
3730 CODE:
3731 cctx_current->idle_sp = 0;
3732
3733void
3734swap_defsv (Coro::State self)
3735 PROTOTYPE: $
3736 ALIAS:
3737 swap_defav = 1
3738 CODE:
3739 if (!self->slot)
3740 croak ("cannot swap state with coroutine that has no saved state,");
3741 else
3742 {
3743 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3744 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3745
3746 SV *tmp = *src; *src = *dst; *dst = tmp;
3747 }
3748
3749void
3750cancel (Coro::State self)
3751 CODE:
3752 coro_state_destroy (aTHX_ self);
3753
3754SV *
3755enable_times (int enabled = enable_times)
3756 CODE:
3757{
3758 RETVAL = boolSV (enable_times);
3759
3760 if (enabled != enable_times)
3761 {
3762 enable_times = enabled;
3763
3764 coro_times_update ();
3765 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3766 }
967} 3767}
968 OUTPUT: 3768 OUTPUT:
969 RETVAL 3769 RETVAL
970 3770
971void 3771void
972transfer(prev, next, flags) 3772times (Coro::State self)
973 SV *prev 3773 PPCODE:
974 SV *next 3774{
975 int flags 3775 struct coro *current = SvSTATE (coro_current);
976 PROTOTYPE: @ 3776
977 CODE: 3777 if (ecb_expect_false (current == self))
978 PUTBACK; 3778 {
979 SV_CORO (next, "Coro::transfer"); 3779 coro_times_update ();
980 SV_CORO (prev, "Coro::transfer"); 3780 coro_times_add (SvSTATE (coro_current));
981 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3781 }
982 SPAGAIN; 3782
3783 EXTEND (SP, 2);
3784 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3785 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3786
3787 if (ecb_expect_false (current == self))
3788 coro_times_sub (SvSTATE (coro_current));
3789}
983 3790
984void 3791void
985DESTROY(coro) 3792swap_sv (Coro::State coro, SV *sv, SV *swapsv)
986 Coro::State coro
987 CODE:
988
989 if (coro->mainstack && coro->mainstack != main_mainstack)
990 {
991 struct coro temp;
992
993 PUTBACK;
994 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
995 LOAD (aTHX_ coro);
996 SPAGAIN;
997
998 destroy_stacks (aTHX);
999
1000 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1001 SPAGAIN;
1002
1003 coro->mainstack = 0;
1004 }
1005
1006 deallocate_stack (coro);
1007 SvREFCNT_dec (coro->args);
1008 Safefree (coro);
1009
1010void
1011_exit(code)
1012 int code
1013 PROTOTYPE: $
1014 CODE: 3793 CODE:
1015 _exit (code); 3794{
3795 struct coro *current = SvSTATE_current;
1016 3796
1017MODULE = Coro::State PACKAGE = Coro::Cont 3797 if (current == coro)
3798 SWAP_SVS (current);
1018 3799
1019void 3800 if (!coro->swap_sv)
1020yield(...) 3801 coro->swap_sv = newAV ();
1021 PROTOTYPE: @
1022 CODE:
1023 SV *yieldstack;
1024 SV *sv;
1025 AV *defav = GvAV (PL_defgv);
1026 struct coro *prev, *next;
1027 3802
1028 yieldstack = *hv_fetch ( 3803 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
1029 (HV *)SvRV (GvSV (coro_current)), 3804 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
1030 "yieldstack", sizeof ("yieldstack") - 1,
1031 0
1032 );
1033 3805
1034 /* set up @_ -- ugly */ 3806 if (current == coro)
1035 av_clear (defav); 3807 SWAP_SVS (current);
1036 av_fill (defav, items - 1); 3808}
1037 while (items--)
1038 av_store (defav, items, SvREFCNT_inc (ST(items)));
1039 3809
1040 sv = av_pop ((AV *)SvRV (yieldstack));
1041 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1042 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1043 SvREFCNT_dec (sv);
1044
1045 coro_state_transfer (aTHX_ prev, next, 0);
1046 3810
1047MODULE = Coro::State PACKAGE = Coro 3811MODULE = Coro::State PACKAGE = Coro
1048 3812
1049BOOT: 3813BOOT:
1050{ 3814{
1051 int i; 3815 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3816 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3817 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3818 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3819 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3820 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3821 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3822 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3823
3824 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3825 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3826 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3827 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3828
1052 HV *stash = gv_stashpv ("Coro", TRUE); 3829 coro_stash = gv_stashpv ("Coro", TRUE);
1053 3830
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3831 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3832 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3833 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3834 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3835 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3836 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV ();
1066 3837
1067 { 3838 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 3839 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1069 3840
1070 coroapi.schedule = api_schedule; 3841 coroapi.schedule = api_schedule;
3842 coroapi.schedule_to = api_schedule_to;
1071 coroapi.cede = api_cede; 3843 coroapi.cede = api_cede;
3844 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 3845 coroapi.ready = api_ready;
3846 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 3847 coroapi.nready = coro_nready;
1074 coroapi.current = coro_current; 3848 coroapi.current = coro_current;
1075 3849
1076 GCoroAPI = &coroapi; 3850 /*GCoroAPI = &coroapi;*/
1077 sv_setiv (sv, (IV)&coroapi); 3851 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on (sv); 3852 SvREADONLY_on (sv);
1079 } 3853 }
1080} 3854}
1081 3855
1082#if !PERL_MICRO 3856SV *
3857async (...)
3858 PROTOTYPE: &@
3859 CODE:
3860 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3861 api_ready (aTHX_ RETVAL);
3862 OUTPUT:
3863 RETVAL
1083 3864
1084void 3865void
1085ready(self) 3866_destroy (Coro::State coro)
1086 SV * self 3867 CODE:
3868 /* used by the manager thread */
3869 coro_state_destroy (aTHX_ coro);
3870
3871void
3872on_destroy (Coro::State coro, SV *cb)
3873 CODE:
3874 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3875
3876void
3877join (...)
3878 CODE:
3879 CORO_EXECUTE_SLF_XS (slf_init_join);
3880
3881void
3882terminate (...)
3883 CODE:
3884 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3885
3886void
3887cancel (...)
3888 CODE:
3889 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3890
3891int
3892safe_cancel (Coro::State self, ...)
3893 C_ARGS: aTHX_ self, &ST (1), items - 1
3894
3895void
3896schedule (...)
3897 CODE:
3898 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3899
3900void
3901schedule_to (...)
3902 CODE:
3903 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3904
3905void
3906cede_to (...)
3907 CODE:
3908 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3909
3910void
3911cede (...)
3912 CODE:
3913 CORO_EXECUTE_SLF_XS (slf_init_cede);
3914
3915void
3916cede_notself (...)
3917 CODE:
3918 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3919
3920void
3921_set_current (SV *current)
1087 PROTOTYPE: $ 3922 PROTOTYPE: $
1088 CODE: 3923 CODE:
1089 api_ready (self); 3924 SvREFCNT_dec (SvRV (coro_current));
3925 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1090 3926
1091#endif 3927void
3928_set_readyhook (SV *hook)
3929 PROTOTYPE: $
3930 CODE:
3931 SvREFCNT_dec (coro_readyhook);
3932 SvGETMAGIC (hook);
3933 if (SvOK (hook))
3934 {
3935 coro_readyhook = newSVsv (hook);
3936 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3937 }
3938 else
3939 {
3940 coro_readyhook = 0;
3941 CORO_READYHOOK = 0;
3942 }
1092 3943
1093int 3944int
3945prio (Coro::State coro, int newprio = 0)
3946 PROTOTYPE: $;$
3947 ALIAS:
3948 nice = 1
3949 CODE:
3950{
3951 RETVAL = coro->prio;
3952
3953 if (items > 1)
3954 {
3955 if (ix)
3956 newprio = coro->prio - newprio;
3957
3958 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3959 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3960
3961 coro->prio = newprio;
3962 }
3963}
3964 OUTPUT:
3965 RETVAL
3966
3967SV *
3968ready (SV *self)
3969 PROTOTYPE: $
3970 CODE:
3971 RETVAL = boolSV (api_ready (aTHX_ self));
3972 OUTPUT:
3973 RETVAL
3974
3975int
1094nready(...) 3976nready (...)
1095 PROTOTYPE: 3977 PROTOTYPE:
1096 CODE: 3978 CODE:
1097 RETVAL = coro_nready; 3979 RETVAL = coro_nready;
1098 OUTPUT: 3980 OUTPUT:
1099 RETVAL 3981 RETVAL
1100 3982
1101void 3983void
1102schedule(...) 3984suspend (Coro::State self)
1103 PROTOTYPE: 3985 PROTOTYPE: $
1104 CODE: 3986 CODE:
1105 api_schedule (); 3987 self->flags |= CF_SUSPENDED;
1106 3988
1107void 3989void
1108cede(...) 3990resume (Coro::State self)
1109 PROTOTYPE: 3991 PROTOTYPE: $
1110 CODE: 3992 CODE:
1111 api_cede (); 3993 self->flags &= ~CF_SUSPENDED;
1112 3994
1113# and these are hacks 3995void
3996_pool_handler (...)
3997 CODE:
3998 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3999
4000void
4001async_pool (SV *cv, ...)
4002 PROTOTYPE: &@
4003 PPCODE:
4004{
4005 HV *hv = (HV *)av_pop (av_async_pool);
4006 AV *av = newAV ();
4007 SV *cb = ST (0);
4008 int i;
4009
4010 av_extend (av, items - 2);
4011 for (i = 1; i < items; ++i)
4012 av_push (av, SvREFCNT_inc_NN (ST (i)));
4013
4014 if ((SV *)hv == &PL_sv_undef)
4015 {
4016 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4017 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4018 SvREFCNT_dec (sv);
4019 }
4020
4021 {
4022 struct coro *coro = SvSTATE_hv (hv);
4023
4024 assert (!coro->invoke_cb);
4025 assert (!coro->invoke_av);
4026 coro->invoke_cb = SvREFCNT_inc (cb);
4027 coro->invoke_av = av;
4028 }
4029
4030 api_ready (aTHX_ (SV *)hv);
4031
4032 if (GIMME_V != G_VOID)
4033 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4034 else
4035 SvREFCNT_dec (hv);
4036}
4037
1114SV * 4038SV *
1115_aio_get_state () 4039rouse_cb ()
4040 PROTOTYPE:
1116 CODE: 4041 CODE:
1117{ 4042 RETVAL = coro_new_rouse_cb (aTHX);
1118 struct {
1119 int errorno;
1120 int laststype;
1121 int laststatval;
1122 Stat_t statcache;
1123 } data;
1124
1125 data.errorno = errno;
1126 data.laststype = PL_laststype;
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129
1130 RETVAL = newSVpvn ((char *)&data, sizeof data);
1131}
1132 OUTPUT: 4043 OUTPUT:
1133 RETVAL 4044 RETVAL
1134 4045
1135void 4046void
1136_aio_set_state (char *data_) 4047rouse_wait (...)
4048 PROTOTYPE: ;$
4049 PPCODE:
4050 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4051
4052void
4053on_enter (SV *block)
4054 ALIAS:
4055 on_leave = 1
1137 PROTOTYPE: $ 4056 PROTOTYPE: &
1138 CODE: 4057 CODE:
1139{ 4058{
1140 struct { 4059 struct coro *coro = SvSTATE_current;
4060 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4061
4062 block = s_get_cv_croak (block);
4063
4064 if (!*avp)
4065 *avp = newAV ();
4066
4067 av_push (*avp, SvREFCNT_inc (block));
4068
4069 if (!ix)
4070 on_enterleave_call (aTHX_ block);
4071
4072 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4073 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4074 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4075}
4076
4077
4078MODULE = Coro::State PACKAGE = PerlIO::cede
4079
4080BOOT:
4081 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4082
4083
4084MODULE = Coro::State PACKAGE = Coro::Semaphore
4085
4086SV *
4087new (SV *klass, SV *count = 0)
4088 CODE:
4089{
4090 int semcnt = 1;
4091
4092 if (count)
4093 {
4094 SvGETMAGIC (count);
4095
4096 if (SvOK (count))
4097 semcnt = SvIV (count);
4098 }
4099
4100 RETVAL = sv_bless (
4101 coro_waitarray_new (aTHX_ semcnt),
4102 GvSTASH (CvGV (cv))
4103 );
4104}
4105 OUTPUT:
4106 RETVAL
4107
4108# helper for Coro::Channel and others
4109SV *
4110_alloc (int count)
4111 CODE:
4112 RETVAL = coro_waitarray_new (aTHX_ count);
4113 OUTPUT:
4114 RETVAL
4115
4116SV *
4117count (SV *self)
4118 CODE:
4119 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4120 OUTPUT:
4121 RETVAL
4122
4123void
4124up (SV *self, int adjust = 1)
4125 ALIAS:
4126 adjust = 1
4127 CODE:
4128 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4129
4130void
4131down (...)
4132 CODE:
4133 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4134
4135void
4136wait (...)
4137 CODE:
4138 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4139
4140void
4141try (SV *self)
4142 PPCODE:
4143{
4144 AV *av = (AV *)SvRV (self);
4145 SV *count_sv = AvARRAY (av)[0];
4146 IV count = SvIVX (count_sv);
4147
4148 if (count > 0)
4149 {
4150 --count;
4151 SvIVX (count_sv) = count;
4152 XSRETURN_YES;
4153 }
4154 else
4155 XSRETURN_NO;
4156}
4157
4158void
4159waiters (SV *self)
4160 PPCODE:
4161{
4162 AV *av = (AV *)SvRV (self);
4163 int wcount = AvFILLp (av) + 1 - 1;
4164
4165 if (GIMME_V == G_SCALAR)
4166 XPUSHs (sv_2mortal (newSViv (wcount)));
4167 else
4168 {
1141 int errorno; 4169 int i;
1142 int laststype; 4170 EXTEND (SP, wcount);
1143 int laststatval; 4171 for (i = 1; i <= wcount; ++i)
1144 Stat_t statcache; 4172 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1145 } *data = (void *)data_; 4173 }
1146
1147 errno = data->errorno;
1148 PL_laststype = data->laststype;
1149 PL_laststatval = data->laststatval;
1150 PL_statcache = data->statcache;
1151} 4174}
4175
4176MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4177
4178void
4179_may_delete (SV *sem, int count, unsigned int extra_refs)
4180 PPCODE:
4181{
4182 AV *av = (AV *)SvRV (sem);
4183
4184 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4185 && AvFILLp (av) == 0 /* no waiters, just count */
4186 && SvIV (AvARRAY (av)[0]) == count)
4187 XSRETURN_YES;
4188
4189 XSRETURN_NO;
4190}
4191
4192MODULE = Coro::State PACKAGE = Coro::Signal
4193
4194SV *
4195new (SV *klass)
4196 CODE:
4197 RETVAL = sv_bless (
4198 coro_waitarray_new (aTHX_ 0),
4199 GvSTASH (CvGV (cv))
4200 );
4201 OUTPUT:
4202 RETVAL
4203
4204void
4205wait (...)
4206 CODE:
4207 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4208
4209void
4210broadcast (SV *self)
4211 CODE:
4212{
4213 AV *av = (AV *)SvRV (self);
4214 coro_signal_wake (aTHX_ av, AvFILLp (av));
4215}
4216
4217void
4218send (SV *self)
4219 CODE:
4220{
4221 AV *av = (AV *)SvRV (self);
4222
4223 if (AvFILLp (av))
4224 coro_signal_wake (aTHX_ av, 1);
4225 else
4226 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4227}
4228
4229IV
4230awaited (SV *self)
4231 CODE:
4232 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4233 OUTPUT:
4234 RETVAL
4235
4236
4237MODULE = Coro::State PACKAGE = Coro::AnyEvent
4238
4239BOOT:
4240 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4241
4242void
4243_schedule (...)
4244 CODE:
4245{
4246 static int incede;
4247
4248 api_cede_notself (aTHX);
4249
4250 ++incede;
4251 while (coro_nready >= incede && api_cede (aTHX))
4252 ;
4253
4254 sv_setsv (sv_activity, &PL_sv_undef);
4255 if (coro_nready >= incede)
4256 {
4257 PUSHMARK (SP);
4258 PUTBACK;
4259 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4260 }
4261
4262 --incede;
4263}
4264
4265
4266MODULE = Coro::State PACKAGE = Coro::AIO
4267
4268void
4269_register (char *target, char *proto, SV *req)
4270 CODE:
4271{
4272 SV *req_cv = s_get_cv_croak (req);
4273 /* newXSproto doesn't return the CV on 5.8 */
4274 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4275 sv_setpv ((SV *)slf_cv, proto);
4276 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4277}
4278
4279MODULE = Coro::State PACKAGE = Coro::Select
4280
4281void
4282patch_pp_sselect ()
4283 CODE:
4284 if (!coro_old_pp_sselect)
4285 {
4286 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4287 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4288 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4289 }
4290
4291void
4292unpatch_pp_sselect ()
4293 CODE:
4294 if (coro_old_pp_sselect)
4295 {
4296 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4297 coro_old_pp_sselect = 0;
4298 }
4299
4300MODULE = Coro::State PACKAGE = Coro::Util
4301
4302void
4303_exit (int code)
4304 CODE:
4305 _exit (code);
4306
4307NV
4308time ()
4309 CODE:
4310 RETVAL = nvtime (aTHX);
4311 OUTPUT:
4312 RETVAL
4313
4314NV
4315gettimeofday ()
4316 PPCODE:
4317{
4318 UV tv [2];
4319 u2time (aTHX_ tv);
4320 EXTEND (SP, 2);
4321 PUSHs (sv_2mortal (newSVuv (tv [0])));
4322 PUSHs (sv_2mortal (newSVuv (tv [1])));
4323}
4324

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