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Comparing Coro/Coro/State.xs (file contents):
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC vs.
Revision 1.439 by root, Tue Nov 19 05:16:01 2013 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
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if USE_VALGRIND 18#define ECB_NO_THREADS 1
10# include <valgrind/valgrind.h> 19#include "ecb.h"
11#endif
12 20
13/* the maximum number of idle cctx that will be pooled */ 21#include <stddef.h>
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42
43#include <stdio.h> 22#include <stdio.h>
44#include <errno.h> 23#include <errno.h>
45
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47# undef STACKGUARD
48#endif
49
50#ifndef STACKGUARD
51# define STACKGUARD 0
52#endif
53
54#ifdef HAVE_MMAP
55# include <unistd.h> 24#include <assert.h>
56# include <sys/mman.h> 25
57# ifndef MAP_ANONYMOUS 26#ifndef SVs_PADSTALE
58# ifdef MAP_ANON 27# define SVs_PADSTALE 0
59# define MAP_ANONYMOUS MAP_ANON
60# else
61# undef HAVE_MMAP
62# endif 28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI 1
32# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
33#else
34typedef AV PADNAMELIST;
35# if !PERL_VERSION_ATLEAST(5,8,0)
36typedef AV PADLIST;
37typedef AV PAD;
63# endif 38# endif
64# include <limits.h> 39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
65# ifndef PAGESIZE 40# define PadlistMAX(pl) AvFILLp (pl)
66# define PAGESIZE pagesize 41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
67# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 42# define PadARRAY AvARRAY
68static long pagesize; 43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
48/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
49#if PERL_VERSION_ATLEAST(5,19,0)
50# define SVt_BIND SVt_IV
51#endif
52
53#if defined(_WIN32)
54# undef HAS_GETTIMEOFDAY
55# undef setjmp
56# undef longjmp
57# undef _exit
58# define setjmp _setjmp /* deep magic */
69# else 59#else
70# define BOOT_PAGESIZE (void)0 60# include <inttypes.h> /* most portable stdint.h */
61#endif
62
63/* the maximum number of idle cctx that will be pooled */
64static int cctx_max_idle = 4;
65
66#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
67# define HAS_SCOPESTACK_NAME 1
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
82# define STACKLEVEL ((void *)&stacklevel)
83#endif
84
85#define IN_DESTRUCT PL_dirty
86
87#include "CoroAPI.h"
88#define GCoroAPI (&coroapi) /* very sneaky */
89
90#ifdef USE_ITHREADS
91# if CORO_PTHREAD
92static void *coro_thx;
71# endif 93# endif
72#else 94#endif
73# define PAGESIZE 0 95
74# define BOOT_PAGESIZE (void)0 96#ifdef __linux
97# include <time.h> /* for timespec */
98# include <syscall.h> /* for SYS_* */
99# ifdef SYS_clock_gettime
100# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
101# define CORO_CLOCK_MONOTONIC 1
102# define CORO_CLOCK_THREAD_CPUTIME_ID 3
75#endif 103# endif
76
77/* The next macro should declare a variable stacklevel that contains and approximation
78 * to the current C stack pointer. Its property is that it changes with each call
79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
81#define STACKLEVEL ((void *)&stacklevel)
82
83#define IN_DESTRUCT (PL_main_cv == Nullcv)
84
85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif 104#endif
90 105
91#define NOINLINE attribute ((noinline)) 106static double (*nvtime)(); /* so why doesn't it take void? */
107static void (*u2time)(pTHX_ UV ret[2]);
92 108
93#include "CoroAPI.h" 109/* we hijack an hopefully unused CV flag for our purposes */
110#define CVf_SLF 0x4000
111static OP *pp_slf (pTHX);
112static void slf_destroy (pTHX_ struct coro *coro);
94 113
95#ifdef USE_ITHREADS 114static U32 cctx_gen;
96static perl_mutex coro_mutex; 115static size_t cctx_stacksize = CORO_STACKSIZE;
97# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
98# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
99#else
100# define LOCK (void)0
101# define UNLOCK (void)0
102#endif
103
104struct io_state
105{
106 int errorno;
107 I32 laststype;
108 int laststatval;
109 Stat_t statcache;
110};
111
112static struct CoroAPI coroapi; 116static struct CoroAPI coroapi;
113static AV *main_mainstack; /* used to differentiate between $main and others */ 117static AV *main_mainstack; /* used to differentiate between $main and others */
118static JMPENV *main_top_env;
114static HV *coro_state_stash, *coro_stash; 119static HV *coro_state_stash, *coro_stash;
115static SV *coro_mortal; /* will be freed after next transfer */ 120static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
121
122static AV *av_destroy; /* destruction queue */
123static SV *sv_manager; /* the manager coro */
124static SV *sv_idle; /* $Coro::idle */
125
126static GV *irsgv; /* $/ */
127static GV *stdoutgv; /* *STDOUT */
128static SV *rv_diehook;
129static SV *rv_warnhook;
130static HV *hv_sig; /* %SIG */
131
132/* async_pool helper stuff */
133static SV *sv_pool_rss;
134static SV *sv_pool_size;
135static SV *sv_async_pool_idle; /* description string */
136static AV *av_async_pool; /* idle pool */
137static SV *sv_Coro; /* class string */
138static CV *cv_pool_handler;
139
140/* Coro::AnyEvent */
141static SV *sv_activity;
142
143/* enable processtime/realtime profiling */
144static char enable_times;
145typedef U32 coro_ts[2];
146static coro_ts time_real, time_cpu;
147static char times_valid;
116 148
117static struct coro_cctx *cctx_first; 149static struct coro_cctx *cctx_first;
118static int cctx_count, cctx_idle; 150static int cctx_count, cctx_idle;
119 151
152enum
153{
154 CC_MAPPED = 0x01,
155 CC_NOREUSE = 0x02, /* throw this away after tracing */
156 CC_TRACE = 0x04,
157 CC_TRACE_SUB = 0x08, /* trace sub calls */
158 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160};
161
120/* this is a structure representing a c-level coroutine */ 162/* this is a structure representing a c-level coroutine */
121typedef struct coro_cctx { 163typedef struct coro_cctx
164{
122 struct coro_cctx *next; 165 struct coro_cctx *next;
123 166
124 /* the stack */ 167 /* the stack */
125 void *sptr; 168 struct coro_stack stack;
126 long ssize; /* positive == mmap, otherwise malloc */
127 169
128 /* cpu state */ 170 /* cpu state */
129 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172#ifndef NDEBUG
173 JMPENV *idle_te; /* same as idle_sp, but for top_env */
174#endif
130 JMPENV *top_env; 175 JMPENV *top_env;
131 coro_context cctx; 176 coro_context cctx;
132 177
133 int inuse; 178 U32 gen;
134
135#if USE_VALGRIND 179#if CORO_USE_VALGRIND
136 int valgrind_id; 180 int valgrind_id;
137#endif 181#endif
182 unsigned char flags;
138} coro_cctx; 183} coro_cctx;
139 184
185static coro_cctx *cctx_current; /* the currently running cctx */
186
187/*****************************************************************************/
188
189static MGVTBL coro_state_vtbl;
190
140enum { 191enum
192{
141 CF_RUNNING = 0x0001, /* coroutine is running */ 193 CF_RUNNING = 0x0001, /* coroutine is running */
142 CF_READY = 0x0002, /* coroutine is ready */ 194 CF_READY = 0x0002, /* coroutine is ready */
143 CF_NEW = 0x0004, /* ahs never been switched to */ 195 CF_NEW = 0x0004, /* has never been switched to */
196 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
197 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
198 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
144}; 199};
145 200
201/* the structure where most of the perl state is stored, overlaid on the cxstack */
202typedef struct
203{
204 #define VARx(name,expr,type) type name;
205 #include "state.h"
206} perl_slots;
207
208/* how many context stack entries do we need for perl_slots */
209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
210
146/* this is a structure representing a perl-level coroutine */ 211/* this is a structure representing a perl-level coroutine */
147struct coro { 212struct coro
213{
148 /* the c coroutine allocated to this perl coroutine, if any */ 214 /* the C coroutine allocated to this perl coroutine, if any */
149 coro_cctx *cctx; 215 coro_cctx *cctx;
150 216
217 /* ready queue */
218 struct coro *next_ready;
219
220 /* state data */
221 struct CoroSLF slf_frame; /* saved slf frame */
222 AV *mainstack;
223 perl_slots *slot; /* basically the saved sp */
224
225 CV *startcv; /* the CV to execute */
151 /* data associated with this coroutine (initial args) */ 226 AV *args; /* data associated with this coroutine (initial args) */
152 AV *args;
153 int refcnt;
154 int save; /* CORO_SAVE flags */
155 int flags; /* CF_ flags */ 227 int flags; /* CF_ flags */
228 HV *hv; /* the perl hash associated with this coro, if any */
156 229
157 /* optionally saved, might be zero */ 230 /* statistics */
158 AV *defav; /* @_ */ 231 int usecount; /* number of transfers to this coro */
159 SV *defsv; /* $_ */
160 SV *errsv; /* $@ */
161 SV *irssv; /* $/ */
162 SV *irssv_sv; /* real $/ cache */
163
164#define VAR(name,type) type name;
165# include "state.h"
166#undef VAR
167 232
168 /* coro process data */ 233 /* coro process data */
169 int prio; 234 int prio;
235 SV *except; /* exception to be thrown */
236 SV *rouse_cb; /* last rouse callback */
237 AV *on_destroy; /* callbacks or coros to notify on destroy */
238 AV *status; /* the exit status list */
239
240 /* async_pool */
241 SV *saved_deffh;
242 SV *invoke_cb;
243 AV *invoke_av;
244
245 /* on_enter/on_leave */
246 AV *on_enter;
247 AV *on_leave;
248
249 /* swap_sv */
250 AV *swap_sv;
251
252 /* times */
253 coro_ts t_cpu, t_real;
254
255 /* linked list */
256 struct coro *next, *prev;
170}; 257};
171 258
172typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
173typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
174 261
262/* the following variables are effectively part of the perl context */
263/* and get copied between struct coro and these variables */
264/* the main reason we don't support windows process emulation */
265static struct CoroSLF slf_frame; /* the current slf frame */
266
267/** Coro ********************************************************************/
268
269#define CORO_PRIO_MAX 3
270#define CORO_PRIO_HIGH 1
271#define CORO_PRIO_NORMAL 0
272#define CORO_PRIO_LOW -1
273#define CORO_PRIO_IDLE -3
274#define CORO_PRIO_MIN -4
275
276/* for Coro.pm */
277static SV *coro_current;
278static SV *coro_readyhook;
279static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
280static CV *cv_coro_run;
281static struct coro *coro_first;
282#define coro_nready coroapi.nready
283
284/** JIT *********************************************************************/
285
286#if CORO_JIT
287 /* APPLE doesn't have mmap though */
288 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
289 #ifndef CORO_JIT_TYPE
290 #if ECB_AMD64 && CORO_JIT_UNIXY
291 #define CORO_JIT_TYPE "amd64-unix"
292 #elif __i386 && CORO_JIT_UNIXY
293 #define CORO_JIT_TYPE "x86-unix"
294 #endif
295 #endif
296#endif
297
298#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
299 #undef CORO_JIT
300#endif
301
302#if CORO_JIT
303 typedef void (*load_save_perl_slots_type)(perl_slots *);
304 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
305#endif
306
307/** Coro::Select ************************************************************/
308
309static OP *(*coro_old_pp_sselect) (pTHX);
310static SV *coro_select_select;
311
312/* horrible hack, but if it works... */
175static AV * 313static OP *
314coro_pp_sselect (pTHX)
315{
316 dSP;
317 PUSHMARK (SP - 4); /* fake argument list */
318 XPUSHs (coro_select_select);
319 PUTBACK;
320
321 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
322 PL_op->op_flags |= OPf_STACKED;
323 PL_op->op_private = 0;
324 return PL_ppaddr [OP_ENTERSUB](aTHX);
325}
326
327/** time stuff **************************************************************/
328
329#ifdef HAS_GETTIMEOFDAY
330
331ecb_inline void
332coro_u2time (pTHX_ UV ret[2])
333{
334 struct timeval tv;
335 gettimeofday (&tv, 0);
336
337 ret [0] = tv.tv_sec;
338 ret [1] = tv.tv_usec;
339}
340
341ecb_inline double
342coro_nvtime (void)
343{
344 struct timeval tv;
345 gettimeofday (&tv, 0);
346
347 return tv.tv_sec + tv.tv_usec * 1e-6;
348}
349
350ecb_inline void
351time_init (pTHX)
352{
353 nvtime = coro_nvtime;
354 u2time = coro_u2time;
355}
356
357#else
358
359ecb_inline void
360time_init (pTHX)
361{
362 SV **svp;
363
364 require_pv ("Time/HiRes.pm");
365
366 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
367
368 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
369 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
370
371 nvtime = INT2PTR (double (*)(), SvIV (*svp));
372
373 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
374 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
375}
376
377#endif
378
379/** lowlevel stuff **********************************************************/
380
381static SV * ecb_noinline
382coro_get_sv (pTHX_ const char *name, int create)
383{
384#if PERL_VERSION_ATLEAST (5,10,0)
385 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
386 get_sv (name, create);
387#endif
388 return get_sv (name, create);
389}
390
391static AV * ecb_noinline
392coro_get_av (pTHX_ const char *name, int create)
393{
394#if PERL_VERSION_ATLEAST (5,10,0)
395 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
396 get_av (name, create);
397#endif
398 return get_av (name, create);
399}
400
401static HV * ecb_noinline
402coro_get_hv (pTHX_ const char *name, int create)
403{
404#if PERL_VERSION_ATLEAST (5,10,0)
405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
406 get_hv (name, create);
407#endif
408 return get_hv (name, create);
409}
410
411ecb_inline void
412coro_times_update (void)
413{
414#ifdef coro_clock_gettime
415 struct timespec ts;
416
417 ts.tv_sec = ts.tv_nsec = 0;
418 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
419 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
420
421 ts.tv_sec = ts.tv_nsec = 0;
422 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
423 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
424#else
425 dTHX;
426 UV tv[2];
427
428 u2time (aTHX_ tv);
429 time_real [0] = tv [0];
430 time_real [1] = tv [1] * 1000;
431#endif
432}
433
434ecb_inline void
435coro_times_add (struct coro *c)
436{
437 c->t_real [1] += time_real [1];
438 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
439 c->t_real [0] += time_real [0];
440
441 c->t_cpu [1] += time_cpu [1];
442 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
443 c->t_cpu [0] += time_cpu [0];
444}
445
446ecb_inline void
447coro_times_sub (struct coro *c)
448{
449 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
450 c->t_real [1] -= time_real [1];
451 c->t_real [0] -= time_real [0];
452
453 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
454 c->t_cpu [1] -= time_cpu [1];
455 c->t_cpu [0] -= time_cpu [0];
456}
457
458/*****************************************************************************/
459/* magic glue */
460
461#define CORO_MAGIC_type_cv 26
462#define CORO_MAGIC_type_state PERL_MAGIC_ext
463
464#define CORO_MAGIC_NN(sv, type) \
465 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
466 ? SvMAGIC (sv) \
467 : mg_find (sv, type))
468
469#define CORO_MAGIC(sv, type) \
470 (ecb_expect_true (SvMAGIC (sv)) \
471 ? CORO_MAGIC_NN (sv, type) \
472 : 0)
473
474#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
475#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
476
477ecb_inline MAGIC *
478SvSTATEhv_p (pTHX_ SV *coro)
479{
480 MAGIC *mg;
481
482 if (ecb_expect_true (
483 SvTYPE (coro) == SVt_PVHV
484 && (mg = CORO_MAGIC_state (coro))
485 && mg->mg_virtual == &coro_state_vtbl
486 ))
487 return mg;
488
489 return 0;
490}
491
492ecb_inline struct coro *
493SvSTATE_ (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (SvROK (coro))
498 coro = SvRV (coro);
499
500 mg = SvSTATEhv_p (aTHX_ coro);
501 if (!mg)
502 croak ("Coro::State object required");
503
504 return (struct coro *)mg->mg_ptr;
505}
506
507#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
508
509/* faster than SvSTATE, but expects a coroutine hv */
510#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
511#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
512
513/*****************************************************************************/
514/* padlist management and caching */
515
516ecb_inline PADLIST *
176coro_clone_padlist (CV *cv) 517coro_derive_padlist (pTHX_ CV *cv)
177{ 518{
178 AV *padlist = CvPADLIST (cv); 519 PADLIST *padlist = CvPADLIST (cv);
179 AV *newpadlist, *newpad; 520 PADLIST *newpadlist;
521 PAD *newpad;
522 PADOFFSET off = PadlistMAX (padlist) + 1;
180 523
181 newpadlist = newAV (); 524#if NEWPADAPI
525
526 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
527 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
528 while (!PadlistARRAY (padlist)[off - 1])
529 --off;
530
531 Perl_pad_push (aTHX_ padlist, off);
532
533 newpad = PadlistARRAY (padlist)[off];
534 PadlistARRAY (padlist)[off] = 0;
535
536#else
537
538#if PERL_VERSION_ATLEAST (5,10,0)
539 Perl_pad_push (aTHX_ padlist, off);
540#else
541 Perl_pad_push (aTHX_ padlist, off, 1);
542#endif
543
544 newpad = PadlistARRAY (padlist)[off];
545 PadlistMAX (padlist) = off - 1;
546
547#endif
548
549 newPADLIST (newpadlist);
550#if !PERL_VERSION_ATLEAST(5,15,3)
551 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
182 AvREAL_off (newpadlist); 552 AvREAL_off (newpadlist);
183#if PERL_VERSION_ATLEAST (5,9,0)
184 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
185#else
186 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
187#endif 553#endif
188 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
189 --AvFILLp (padlist);
190 554
191 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 555 /* Already extended to 2 elements by newPADLIST. */
192 av_store (newpadlist, 1, (SV *)newpad); 556 PadlistMAX (newpadlist) = 1;
557 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
558 PadlistARRAY (newpadlist)[1] = newpad;
193 559
194 return newpadlist; 560 return newpadlist;
195} 561}
196 562
197static void 563ecb_inline void
198free_padlist (AV *padlist) 564free_padlist (pTHX_ PADLIST *padlist)
199{ 565{
200 /* may be during global destruction */ 566 /* may be during global destruction */
201 if (SvREFCNT (padlist)) 567 if (!IN_DESTRUCT)
202 { 568 {
203 I32 i = AvFILLp (padlist); 569 I32 i = PadlistMAX (padlist);
204 while (i >= 0) 570
571 while (i > 0) /* special-case index 0 */
205 { 572 {
206 SV **svp = av_fetch (padlist, i--, FALSE); 573 /* we try to be extra-careful here */
574 PAD *pad = PadlistARRAY (padlist)[i--];
575
207 if (svp) 576 if (pad)
208 { 577 {
209 SV *sv; 578 I32 j = PadMAX (pad);
210 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 579
580 while (j >= 0)
211 SvREFCNT_dec (sv); 581 SvREFCNT_dec (PadARRAY (pad)[j--]);
212 582
583 PadMAX (pad) = -1;
213 SvREFCNT_dec (*svp); 584 SvREFCNT_dec (pad);
214 } 585 }
215 } 586 }
216 587
588 SvREFCNT_dec (PadlistNAMES (padlist));
589
590#if NEWPADAPI
591 Safefree (PadlistARRAY (padlist));
592 Safefree (padlist);
593#else
594 AvFILLp (padlist) = -1;
595 AvREAL_off (padlist);
217 SvREFCNT_dec ((SV*)padlist); 596 SvREFCNT_dec ((SV*)padlist);
597#endif
218 } 598 }
219} 599}
220 600
221static int 601static int
222coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 602coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
223{ 603{
224 AV *padlist; 604 PADLIST *padlist;
225 AV *av = (AV *)mg->mg_obj; 605 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
606 size_t len = *(size_t *)mg->mg_ptr;
226 607
227 /* casting is fun. */ 608 /* perl manages to free our internal AV and _then_ call us */
228 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 609 if (IN_DESTRUCT)
610 return 0;
611
612 while (len--)
229 free_padlist (padlist); 613 free_padlist (aTHX_ padlists[len]);
230
231 SvREFCNT_dec (av);
232 614
233 return 0; 615 return 0;
234} 616}
235 617
236#define PERL_MAGIC_coro PERL_MAGIC_ext 618static MGVTBL coro_cv_vtbl = {
237 619 0, 0, 0, 0,
238static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 620 coro_cv_free
239 621};
240#define CORO_MAGIC(cv) \
241 SvMAGIC (cv) \
242 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
243 ? SvMAGIC (cv) \
244 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
245 : 0
246 622
247/* the next two functions merely cache the padlists */ 623/* the next two functions merely cache the padlists */
248static void 624ecb_inline void
249get_padlist (CV *cv) 625get_padlist (pTHX_ CV *cv)
250{ 626{
251 MAGIC *mg = CORO_MAGIC (cv); 627 MAGIC *mg = CORO_MAGIC_cv (cv);
252 AV *av; 628 size_t *lenp;
253 629
254 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 630 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
255 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 631 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
256 else 632 else
257 { 633 {
258#if 0 634#if CORO_PREFER_PERL_FUNCTIONS
259 /* this is probably cleaner, but also slower? */ 635 /* this is probably cleaner? but also slower! */
636 /* in practise, it seems to be less stable */
260 CV *cp = Perl_cv_clone (cv); 637 CV *cp = Perl_cv_clone (aTHX_ cv);
261 CvPADLIST (cv) = CvPADLIST (cp); 638 CvPADLIST (cv) = CvPADLIST (cp);
262 CvPADLIST (cp) = 0; 639 CvPADLIST (cp) = 0;
263 SvREFCNT_dec (cp); 640 SvREFCNT_dec (cp);
264#else 641#else
265 CvPADLIST (cv) = coro_clone_padlist (cv); 642 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
266#endif 643#endif
267 } 644 }
268} 645}
269 646
270static void 647ecb_inline void
271put_padlist (CV *cv) 648put_padlist (pTHX_ CV *cv)
272{ 649{
273 MAGIC *mg = CORO_MAGIC (cv); 650 MAGIC *mg = CORO_MAGIC_cv (cv);
274 AV *av;
275 651
276 if (!mg) 652 if (ecb_expect_false (!mg))
277 {
278 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280 mg->mg_virtual = &vtbl_coro;
281 mg->mg_obj = (SV *)newAV ();
282 } 653 {
654 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
655 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
656 mg->mg_len = 1; /* so mg_free frees mg_ptr */
657 }
658 else
659 Renew (mg->mg_ptr,
660 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
661 char);
283 662
284 av = (AV *)mg->mg_obj; 663 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
285
286 if (AvFILLp (av) >= AvMAX (av))
287 av_extend (av, AvMAX (av) + 1);
288
289 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
290} 664}
291 665
292#define SB do { 666/** load & save, init *******************************************************/
293#define SE } while (0)
294 667
295#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 668ecb_inline void
669swap_sv (SV *a, SV *b)
670{
671 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
672 SV tmp;
296 673
674 /* swap sv_any */
675 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
676
677 /* swap sv_flags */
678 SvFLAGS (&tmp) = SvFLAGS (a);
679 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
680 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
681
682#if PERL_VERSION_ATLEAST (5,10,0)
683 /* perl 5.10 and later complicates this _quite_ a bit, but it also
684 * is much faster, so no quarrels here. alternatively, we could
685 * sv_upgrade to avoid this.
686 */
687 {
688 /* swap sv_u */
689 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
690
691 /* if SvANY points to the head, we need to adjust the pointers,
692 * as the pointer for a still points to b, and maybe vice versa.
693 */
694 #define svany_in_head(type) \
695 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
696
697 if (svany_in_head (SvTYPE (a)))
698 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
699
700 if (svany_in_head (SvTYPE (b)))
701 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
702 }
703#endif
704}
705
706/* swap sv heads, at least logically */
297static void 707static void
708swap_svs (pTHX_ Coro__State c)
709{
710 int i;
711
712 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
713 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
714}
715
716#define SWAP_SVS(coro) \
717 if (ecb_expect_false ((coro)->swap_sv)) \
718 swap_svs (aTHX_ (coro))
719
720static void
721on_enterleave_call (pTHX_ SV *cb);
722
723static void
298load_perl (Coro__State c) 724load_perl (pTHX_ Coro__State c)
299{ 725{
300#define VAR(name,type) PL_ ## name = c->name; 726 perl_slots *slot = c->slot;
727 c->slot = 0;
728
729 PL_mainstack = c->mainstack;
730
731#if CORO_JIT
732 load_perl_slots (slot);
733#else
734 #define VARx(name,expr,type) expr = slot->name;
301# include "state.h" 735 #include "state.h"
302#undef VAR 736#endif
303
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
307 if (c->irssv)
308 {
309 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
310 SvREFCNT_dec (c->irssv);
311 else
312 {
313 REPLACE_SV (PL_rs, c->irssv);
314 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
315 sv_setsv (c->irssv_sv, PL_rs);
316 }
317 }
318 737
319 { 738 {
320 dSP; 739 dSP;
740
321 CV *cv; 741 CV *cv;
322 742
323 /* now do the ugly restore mess */ 743 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs)) 744 while (ecb_expect_true (cv = (CV *)POPs))
325 { 745 {
326 put_padlist (cv); /* mark this padlist as available */ 746 put_padlist (aTHX_ cv); /* mark this padlist as available */
327 CvDEPTH (cv) = PTR2IV (POPs); 747 CvDEPTH (cv) = PTR2IV (POPs);
328 CvPADLIST (cv) = (AV *)POPs; 748 CvPADLIST (cv) = (PADLIST *)POPs;
329 } 749 }
330 750
331 PUTBACK; 751 PUTBACK;
332 } 752 }
333}
334 753
754 slf_frame = c->slf_frame;
755 CORO_THROW = c->except;
756
757 if (ecb_expect_false (enable_times))
758 {
759 if (ecb_expect_false (!times_valid))
760 coro_times_update ();
761
762 coro_times_sub (c);
763 }
764
765 if (ecb_expect_false (c->on_enter))
766 {
767 int i;
768
769 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
770 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
771 }
772
773 SWAP_SVS (c);
774}
775
335static void 776static void
336save_perl (Coro__State c) 777save_perl (pTHX_ Coro__State c)
337{ 778{
779 SWAP_SVS (c);
780
781 if (ecb_expect_false (c->on_leave))
782 {
783 int i;
784
785 for (i = AvFILLp (c->on_leave); i >= 0; --i)
786 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
787 }
788
789 times_valid = 0;
790
791 if (ecb_expect_false (enable_times))
792 {
793 coro_times_update (); times_valid = 1;
794 coro_times_add (c);
795 }
796
797 c->except = CORO_THROW;
798 c->slf_frame = slf_frame;
799
338 { 800 {
339 dSP; 801 dSP;
340 I32 cxix = cxstack_ix; 802 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 803 PERL_CONTEXT *ccstk = cxstack;
342 PERL_SI *top_si = PL_curstackinfo; 804 PERL_SI *top_si = PL_curstackinfo;
… …
344 /* 806 /*
345 * the worst thing you can imagine happens first - we have to save 807 * the worst thing you can imagine happens first - we have to save
346 * (and reinitialize) all cv's in the whole callchain :( 808 * (and reinitialize) all cv's in the whole callchain :(
347 */ 809 */
348 810
349 PUSHs (Nullsv); 811 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 812 /* this loop was inspired by pp_caller */
351 for (;;) 813 for (;;)
352 { 814 {
353 while (cxix >= 0) 815 while (ecb_expect_true (cxix >= 0))
354 { 816 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 817 PERL_CONTEXT *cx = &ccstk[cxix--];
356 818
357 if (CxTYPE (cx) == CXt_SUB) 819 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
358 { 820 {
359 CV *cv = cx->blk_sub.cv; 821 CV *cv = cx->blk_sub.cv;
360 822
361 if (CvDEPTH (cv)) 823 if (ecb_expect_true (CvDEPTH (cv)))
362 { 824 {
363 EXTEND (SP, 3); 825 EXTEND (SP, 3);
364
365 PUSHs ((SV *)CvPADLIST (cv)); 826 PUSHs ((SV *)CvPADLIST (cv));
366 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 827 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 828 PUSHs ((SV *)cv);
368 829
369 CvDEPTH (cv) = 0; 830 CvDEPTH (cv) = 0;
370 get_padlist (cv); 831 get_padlist (aTHX_ cv);
371 } 832 }
372 } 833 }
373#ifdef CXt_FORMAT
374 else if (CxTYPE (cx) == CXt_FORMAT)
375 {
376 /* I never used formats, so how should I know how these are implemented? */
377 /* my bold guess is as a simple, plain sub... */
378 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379 }
380#endif
381 } 834 }
382 835
383 if (top_si->si_type == PERLSI_MAIN) 836 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
384 break; 837 break;
385 838
386 top_si = top_si->si_prev; 839 top_si = top_si->si_prev;
387 ccstk = top_si->si_cxstack; 840 ccstk = top_si->si_cxstack;
388 cxix = top_si->si_cxix; 841 cxix = top_si->si_cxix;
389 } 842 }
390 843
391 PUTBACK; 844 PUTBACK;
392 } 845 }
393 846
394 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 847 /* allocate some space on the context stack for our purposes */
395 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 848 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
396 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 849 {
397 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 850 unsigned int i;
398 851
399#define VAR(name,type)c->name = PL_ ## name; 852 for (i = 0; i < SLOT_COUNT; ++i)
853 CXINC;
854
855 cxstack_ix -= SLOT_COUNT; /* undo allocation */
856 }
857
858 c->mainstack = PL_mainstack;
859
860 {
861 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
862
863#if CORO_JIT
864 save_perl_slots (slot);
865#else
866 #define VARx(name,expr,type) slot->name = expr;
400# include "state.h" 867 #include "state.h"
401#undef VAR 868#endif
869 }
402} 870}
403 871
404/* 872/*
405 * allocate various perl stacks. This is an exact copy 873 * allocate various perl stacks. This is almost an exact copy
406 * of perl.c:init_stacks, except that it uses less memory 874 * of perl.c:init_stacks, except that it uses less memory
407 * on the (sometimes correct) assumption that coroutines do 875 * on the (sometimes correct) assumption that coroutines do
408 * not usually need a lot of stackspace. 876 * not usually need a lot of stackspace.
409 */ 877 */
878#if CORO_PREFER_PERL_FUNCTIONS
879# define coro_init_stacks(thx) init_stacks ()
880#else
410static void 881static void
411coro_init_stacks () 882coro_init_stacks (pTHX)
412{ 883{
413 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 884 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
414 PL_curstackinfo->si_type = PERLSI_MAIN; 885 PL_curstackinfo->si_type = PERLSI_MAIN;
415 PL_curstack = PL_curstackinfo->si_stack; 886 PL_curstack = PL_curstackinfo->si_stack;
416 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 887 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
417 888
418 PL_stack_base = AvARRAY(PL_curstack); 889 PL_stack_base = AvARRAY(PL_curstack);
419 PL_stack_sp = PL_stack_base; 890 PL_stack_sp = PL_stack_base;
420 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 891 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
421 892
422 New(50,PL_tmps_stack,128,SV*); 893 New(50,PL_tmps_stack,32,SV*);
423 PL_tmps_floor = -1; 894 PL_tmps_floor = -1;
424 PL_tmps_ix = -1; 895 PL_tmps_ix = -1;
425 PL_tmps_max = 128; 896 PL_tmps_max = 32;
426 897
427 New(54,PL_markstack,32,I32); 898 New(54,PL_markstack,16,I32);
428 PL_markstack_ptr = PL_markstack; 899 PL_markstack_ptr = PL_markstack;
429 PL_markstack_max = PL_markstack + 32; 900 PL_markstack_max = PL_markstack + 16;
430 901
431#ifdef SET_MARK_OFFSET 902#ifdef SET_MARK_OFFSET
432 SET_MARK_OFFSET; 903 SET_MARK_OFFSET;
433#endif 904#endif
434 905
435 New(54,PL_scopestack,32,I32); 906 New(54,PL_scopestack,8,I32);
436 PL_scopestack_ix = 0; 907 PL_scopestack_ix = 0;
437 PL_scopestack_max = 32; 908 PL_scopestack_max = 8;
909#if HAS_SCOPESTACK_NAME
910 New(54,PL_scopestack_name,8,const char*);
911#endif
438 912
439 New(54,PL_savestack,64,ANY); 913 New(54,PL_savestack,24,ANY);
440 PL_savestack_ix = 0; 914 PL_savestack_ix = 0;
441 PL_savestack_max = 64; 915 PL_savestack_max = 24;
442 916
443#if !PERL_VERSION_ATLEAST (5,9,0) 917#if !PERL_VERSION_ATLEAST (5,10,0)
444 New(54,PL_retstack,16,OP*); 918 New(54,PL_retstack,4,OP*);
445 PL_retstack_ix = 0; 919 PL_retstack_ix = 0;
446 PL_retstack_max = 16; 920 PL_retstack_max = 4;
447#endif 921#endif
448} 922}
923#endif
449 924
450/* 925/*
451 * destroy the stacks, the callchain etc... 926 * destroy the stacks, the callchain etc...
452 */ 927 */
453static void 928static void
454coro_destroy_stacks () 929coro_destruct_stacks (pTHX)
455{ 930{
456 if (!IN_DESTRUCT)
457 {
458 /* is this ugly, I ask? */
459 LEAVE_SCOPE (0);
460
461 /* sure it is, but more important: is it correct?? :/ */
462 FREETMPS;
463
464 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
465 }
466
467 while (PL_curstackinfo->si_next) 931 while (PL_curstackinfo->si_next)
468 PL_curstackinfo = PL_curstackinfo->si_next; 932 PL_curstackinfo = PL_curstackinfo->si_next;
469 933
470 while (PL_curstackinfo) 934 while (PL_curstackinfo)
471 { 935 {
472 PERL_SI *p = PL_curstackinfo->si_prev; 936 PERL_SI *p = PL_curstackinfo->si_prev;
473 937
474 { /*D*//*remove*/
475 dSP;
476 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
477 PUTBACK; /* possibly superfluous */
478 }
479
480 if (!IN_DESTRUCT) 938 if (!IN_DESTRUCT)
481 {
482 dounwind (-1);/*D*//*remove*/
483 SvREFCNT_dec (PL_curstackinfo->si_stack); 939 SvREFCNT_dec (PL_curstackinfo->si_stack);
484 }
485 940
486 Safefree (PL_curstackinfo->si_cxstack); 941 Safefree (PL_curstackinfo->si_cxstack);
487 Safefree (PL_curstackinfo); 942 Safefree (PL_curstackinfo);
488 PL_curstackinfo = p; 943 PL_curstackinfo = p;
489 } 944 }
490 945
491 Safefree (PL_tmps_stack); 946 Safefree (PL_tmps_stack);
492 Safefree (PL_markstack); 947 Safefree (PL_markstack);
493 Safefree (PL_scopestack); 948 Safefree (PL_scopestack);
949#if HAS_SCOPESTACK_NAME
950 Safefree (PL_scopestack_name);
951#endif
494 Safefree (PL_savestack); 952 Safefree (PL_savestack);
495#if !PERL_VERSION_ATLEAST (5,9,0) 953#if !PERL_VERSION_ATLEAST (5,10,0)
496 Safefree (PL_retstack); 954 Safefree (PL_retstack);
497#endif 955#endif
498} 956}
499 957
958#define CORO_RSS \
959 rss += sizeof (SYM (curstackinfo)); \
960 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
961 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
962 rss += SYM (tmps_max) * sizeof (SV *); \
963 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
964 rss += SYM (scopestack_max) * sizeof (I32); \
965 rss += SYM (savestack_max) * sizeof (ANY);
966
967static size_t
968coro_rss (pTHX_ struct coro *coro)
969{
970 size_t rss = sizeof (*coro);
971
972 if (coro->mainstack)
973 {
974 if (coro->flags & CF_RUNNING)
975 {
976 #define SYM(sym) PL_ ## sym
977 CORO_RSS;
978 #undef SYM
979 }
980 else
981 {
982 #define SYM(sym) coro->slot->sym
983 CORO_RSS;
984 #undef SYM
985 }
986 }
987
988 return rss;
989}
990
991/** coroutine stack handling ************************************************/
992
993static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
994static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
995static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
996
997/* apparently < 5.8.8 */
998#ifndef MgPV_nolen_const
999#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1000 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1001 (const char*)(mg)->mg_ptr)
1002#endif
1003
1004/*
1005 * This overrides the default magic get method of %SIG elements.
1006 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1007 * and instead of trying to save and restore the hash elements (extremely slow),
1008 * we just provide our own readback here.
1009 */
1010static int ecb_cold
1011coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1012{
1013 const char *s = MgPV_nolen_const (mg);
1014
1015 if (*s == '_')
1016 {
1017 SV **svp = 0;
1018
1019 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1020 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1021
1022 if (svp)
1023 {
1024 SV *ssv;
1025
1026 if (!*svp)
1027 ssv = &PL_sv_undef;
1028 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1029 ssv = sv_2mortal (newRV_inc (*svp));
1030 else
1031 ssv = *svp;
1032
1033 sv_setsv (sv, ssv);
1034 return 0;
1035 }
1036 }
1037
1038 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1039}
1040
1041static int ecb_cold
1042coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1043{
1044 const char *s = MgPV_nolen_const (mg);
1045
1046 if (*s == '_')
1047 {
1048 SV **svp = 0;
1049
1050 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1051 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1052
1053 if (svp)
1054 {
1055 SV *old = *svp;
1056 *svp = 0;
1057 SvREFCNT_dec (old);
1058 return 0;
1059 }
1060 }
1061
1062 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1063}
1064
1065static int ecb_cold
1066coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1067{
1068 const char *s = MgPV_nolen_const (mg);
1069
1070 if (*s == '_')
1071 {
1072 SV **svp = 0;
1073
1074 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1075 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1076
1077 if (svp)
1078 {
1079 SV *old = *svp;
1080 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1081 SvREFCNT_dec (old);
1082 return 0;
1083 }
1084 }
1085
1086 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1087}
1088
1089static void
1090prepare_nop (pTHX_ struct coro_transfer_args *ta)
1091{
1092 /* kind of mega-hacky, but works */
1093 ta->next = ta->prev = (struct coro *)ta;
1094}
1095
500static void 1096static int
501setup_coro (struct coro *coro) 1097slf_check_nop (pTHX_ struct CoroSLF *frame)
1098{
1099 return 0;
1100}
1101
1102static int
1103slf_check_repeat (pTHX_ struct CoroSLF *frame)
1104{
1105 return 1;
1106}
1107
1108static UNOP init_perl_op;
1109
1110ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1111init_perl (pTHX_ struct coro *coro)
502{ 1112{
503 /* 1113 /*
504 * emulate part of the perl startup here. 1114 * emulate part of the perl startup here.
505 */ 1115 */
506
507 coro_init_stacks (); 1116 coro_init_stacks (aTHX);
508 1117
1118 PL_runops = RUNOPS_DEFAULT;
509 PL_curcop = &PL_compiling; 1119 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL; 1120 PL_in_eval = EVAL_NULL;
1121 PL_comppad = 0;
1122 PL_comppad_name = 0;
1123 PL_comppad_name_fill = 0;
1124 PL_comppad_name_floor = 0;
511 PL_curpm = 0; 1125 PL_curpm = 0;
1126 PL_curpad = 0;
512 PL_localizing = 0; 1127 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 0; 1128 PL_restartop = 0;
1129#if PERL_VERSION_ATLEAST (5,10,0)
1130 PL_parser = 0;
1131#endif
1132 PL_hints = 0;
1133
1134 /* recreate the die/warn hooks */
1135 PL_diehook = SvREFCNT_inc (rv_diehook);
1136 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1137
1138 GvSV (PL_defgv) = newSV (0);
1139 GvAV (PL_defgv) = coro->args; coro->args = 0;
1140 GvSV (PL_errgv) = newSV (0);
1141 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1142 GvHV (PL_hintgv) = 0;
1143 PL_rs = newSVsv (GvSV (irsgv));
1144 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
515 1145
516 { 1146 {
517 dSP; 1147 dSP;
518 LOGOP myop; 1148 UNOP myop;
519 1149
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP); 1150 Zero (&myop, 1, UNOP);
524 myop.op_next = Nullop; 1151 myop.op_next = Nullop;
1152 myop.op_type = OP_ENTERSUB;
525 myop.op_flags = OPf_WANT_VOID; 1153 myop.op_flags = OPf_WANT_VOID;
526 1154
527 PUSHMARK (SP); 1155 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1156 PUSHs ((SV *)coro->startcv);
529 PUTBACK; 1157 PUTBACK;
530 PL_op = (OP *)&myop; 1158 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1159 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 } 1160 }
534 1161
535 ENTER; /* necessary e.g. for dounwind */ 1162 /* this newly created coroutine might be run on an existing cctx which most
536} 1163 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1164 */
1165 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1166 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1167 slf_frame.destroy = 0;
537 1168
1169 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1170 init_perl_op.op_next = PL_op;
1171 init_perl_op.op_type = OP_ENTERSUB;
1172 init_perl_op.op_ppaddr = pp_slf;
1173 /* no flags etc. required, as an init function won't be called */
1174
1175 PL_op = (OP *)&init_perl_op;
1176
1177 /* copy throw, in case it was set before init_perl */
1178 CORO_THROW = coro->except;
1179
1180 SWAP_SVS (coro);
1181
1182 if (ecb_expect_false (enable_times))
1183 {
1184 coro_times_update ();
1185 coro_times_sub (coro);
1186 }
1187}
1188
538static void 1189static void
1190coro_unwind_stacks (pTHX)
1191{
1192 if (!IN_DESTRUCT)
1193 {
1194 /* restore all saved variables and stuff */
1195 LEAVE_SCOPE (0);
1196 assert (PL_tmps_floor == -1);
1197
1198 /* free all temporaries */
1199 FREETMPS;
1200 assert (PL_tmps_ix == -1);
1201
1202 /* unwind all extra stacks */
1203 POPSTACK_TO (PL_mainstack);
1204
1205 /* unwind main stack */
1206 dounwind (-1);
1207 }
1208}
1209
1210static void
1211destroy_perl (pTHX_ struct coro *coro)
1212{
1213 SV *svf [9];
1214
1215 {
1216 SV *old_current = SvRV (coro_current);
1217 struct coro *current = SvSTATE (old_current);
1218
1219 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1220
1221 save_perl (aTHX_ current);
1222
1223 /* this will cause transfer_check to croak on block*/
1224 SvRV_set (coro_current, (SV *)coro->hv);
1225
1226 load_perl (aTHX_ coro);
1227
1228 coro_unwind_stacks (aTHX);
1229
1230 /* restore swapped sv's */
1231 SWAP_SVS (coro);
1232
1233 coro_destruct_stacks (aTHX);
1234
1235 /* now save some sv's to be free'd later */
1236 svf [0] = GvSV (PL_defgv);
1237 svf [1] = (SV *)GvAV (PL_defgv);
1238 svf [2] = GvSV (PL_errgv);
1239 svf [3] = (SV *)PL_defoutgv;
1240 svf [4] = PL_rs;
1241 svf [5] = GvSV (irsgv);
1242 svf [6] = (SV *)GvHV (PL_hintgv);
1243 svf [7] = PL_diehook;
1244 svf [8] = PL_warnhook;
1245 assert (9 == sizeof (svf) / sizeof (*svf));
1246
1247 SvRV_set (coro_current, old_current);
1248
1249 load_perl (aTHX_ current);
1250 }
1251
1252 {
1253 unsigned int i;
1254
1255 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1256 SvREFCNT_dec (svf [i]);
1257
1258 SvREFCNT_dec (coro->saved_deffh);
1259 SvREFCNT_dec (coro->rouse_cb);
1260 SvREFCNT_dec (coro->invoke_cb);
1261 SvREFCNT_dec (coro->invoke_av);
1262 }
1263}
1264
1265ecb_inline void
539free_coro_mortal () 1266free_coro_mortal (pTHX)
540{ 1267{
541 if (coro_mortal) 1268 if (ecb_expect_true (coro_mortal))
542 { 1269 {
543 SvREFCNT_dec (coro_mortal); 1270 SvREFCNT_dec ((SV *)coro_mortal);
544 coro_mortal = 0; 1271 coro_mortal = 0;
545 } 1272 }
546} 1273}
547 1274
548/* inject a fake call to Coro::State::_cctx_init into the execution */
549static void NOINLINE
550prepare_cctx (coro_cctx *cctx)
551{
552 dSP;
553 LOGOP myop;
554
555 Zero (&myop, 1, LOGOP);
556 myop.op_next = PL_op;
557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558
559 PUSHMARK (SP);
560 EXTEND (SP, 2);
561 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
562 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
563 PUTBACK;
564 PL_op = (OP *)&myop;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN;
567}
568
569static void 1275static int
570coro_run (void *arg) 1276runops_trace (pTHX)
571{ 1277{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1278 COP *oldcop = 0;
573 UNLOCK; 1279 int oldcxix = -2;
574 1280
575 /* 1281 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
576 * this is a _very_ stripped down perl interpreter ;) 1282 {
577 */ 1283 PERL_ASYNC_CHECK ();
1284
1285 if (cctx_current->flags & CC_TRACE_ALL)
1286 {
1287 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1288 {
1289 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1290 SV **bot, **top;
1291 AV *av = newAV (); /* return values */
1292 SV **cb;
1293 dSP;
1294
1295 GV *gv = CvGV (cx->blk_sub.cv);
1296 SV *fullname = sv_2mortal (newSV (0));
1297 if (isGV (gv))
1298 gv_efullname3 (fullname, gv, 0);
1299
1300 bot = PL_stack_base + cx->blk_oldsp + 1;
1301 top = cx->blk_gimme == G_ARRAY ? SP + 1
1302 : cx->blk_gimme == G_SCALAR ? bot + 1
1303 : bot;
1304
1305 av_extend (av, top - bot);
1306 while (bot < top)
1307 av_push (av, SvREFCNT_inc_NN (*bot++));
1308
1309 PL_runops = RUNOPS_DEFAULT;
1310 ENTER;
1311 SAVETMPS;
1312 EXTEND (SP, 3);
1313 PUSHMARK (SP);
1314 PUSHs (&PL_sv_no);
1315 PUSHs (fullname);
1316 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1317 PUTBACK;
1318 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1319 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1320 SPAGAIN;
1321 FREETMPS;
1322 LEAVE;
1323 PL_runops = runops_trace;
1324 }
1325
1326 if (oldcop != PL_curcop)
1327 {
1328 oldcop = PL_curcop;
1329
1330 if (PL_curcop != &PL_compiling)
1331 {
1332 SV **cb;
1333
1334 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1335 {
1336 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1337
1338 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1339 {
1340 dSP;
1341 GV *gv = CvGV (cx->blk_sub.cv);
1342 SV *fullname = sv_2mortal (newSV (0));
1343
1344 if (isGV (gv))
1345 gv_efullname3 (fullname, gv, 0);
1346
1347 PL_runops = RUNOPS_DEFAULT;
1348 ENTER;
1349 SAVETMPS;
1350 EXTEND (SP, 3);
1351 PUSHMARK (SP);
1352 PUSHs (&PL_sv_yes);
1353 PUSHs (fullname);
1354 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1355 PUTBACK;
1356 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1357 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1358 SPAGAIN;
1359 FREETMPS;
1360 LEAVE;
1361 PL_runops = runops_trace;
1362 }
1363
1364 oldcxix = cxstack_ix;
1365 }
1366
1367 if (cctx_current->flags & CC_TRACE_LINE)
1368 {
1369 dSP;
1370
1371 PL_runops = RUNOPS_DEFAULT;
1372 ENTER;
1373 SAVETMPS;
1374 EXTEND (SP, 3);
1375 PL_runops = RUNOPS_DEFAULT;
1376 PUSHMARK (SP);
1377 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1378 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1379 PUTBACK;
1380 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1381 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1382 SPAGAIN;
1383 FREETMPS;
1384 LEAVE;
1385 PL_runops = runops_trace;
1386 }
1387 }
1388 }
1389 }
1390 }
1391
1392 TAINT_NOT;
1393 return 0;
1394}
1395
1396static struct CoroSLF cctx_ssl_frame;
1397
1398static void
1399slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1400{
1401 ta->prev = 0;
1402}
1403
1404static int
1405slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1406{
1407 *frame = cctx_ssl_frame;
1408
1409 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1410}
1411
1412/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1413static void ecb_noinline
1414cctx_prepare (pTHX)
1415{
578 PL_top_env = &PL_start_env; 1416 PL_top_env = &PL_start_env;
579 1417
1418 if (cctx_current->flags & CC_TRACE)
1419 PL_runops = runops_trace;
1420
1421 /* we already must be executing an SLF op, there is no other valid way
1422 * that can lead to creation of a new cctx */
1423 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1424 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1425
1426 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1427 cctx_ssl_frame = slf_frame;
1428
1429 slf_frame.prepare = slf_prepare_set_stacklevel;
1430 slf_frame.check = slf_check_set_stacklevel;
1431}
1432
1433/* the tail of transfer: execute stuff we can only do after a transfer */
1434ecb_inline void
1435transfer_tail (pTHX)
1436{
1437 free_coro_mortal (aTHX);
1438}
1439
1440/* try to exit the same way perl's main function would do */
1441/* we do not bother resetting the environment or other things *7
1442/* that are not, uhm, essential */
1443/* this obviously also doesn't work when perl is embedded */
1444static void ecb_noinline ecb_cold
1445perlish_exit (pTHX)
1446{
1447 int exitstatus = perl_destruct (PL_curinterp);
1448 perl_free (PL_curinterp);
1449 exit (exitstatus);
1450}
1451
1452/*
1453 * this is a _very_ stripped down perl interpreter ;)
1454 */
1455static void
1456cctx_run (void *arg)
1457{
1458#ifdef USE_ITHREADS
1459# if CORO_PTHREAD
1460 PERL_SET_CONTEXT (coro_thx);
1461# endif
1462#endif
1463 {
1464 dTHX;
1465
1466 /* normally we would need to skip the entersub here */
1467 /* not doing so will re-execute it, which is exactly what we want */
1468 /* PL_nop = PL_nop->op_next */
1469
580 /* inject call to cctx_init */ 1470 /* inject a fake subroutine call to cctx_init */
581 prepare_cctx ((coro_cctx *)arg); 1471 cctx_prepare (aTHX);
582 1472
1473 /* cctx_run is the alternative tail of transfer() */
1474 transfer_tail (aTHX);
1475
583 /* somebody will hit me for both perl_run and PL_restartop */ 1476 /* somebody or something will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op; 1477 PL_restartop = PL_op;
585 perl_run (PL_curinterp); 1478 perl_run (PL_curinterp);
1479 /*
1480 * Unfortunately, there is no way to get at the return values of the
1481 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1482 * runtime errors here, as this is just a random interpreter, not a thread.
1483 */
586 1484
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1485 /*
588 abort (); 1486 * If perl-run returns we assume exit() was being called or the coro
1487 * fell off the end, which seems to be the only valid (non-bug)
1488 * reason for perl_run to return. We try to mimic whatever perl is normally
1489 * doing in that case. YMMV.
1490 */
1491 perlish_exit (aTHX);
1492 }
589} 1493}
590 1494
591static coro_cctx * 1495static coro_cctx *
592cctx_new () 1496cctx_new (void)
593{ 1497{
594 coro_cctx *cctx; 1498 coro_cctx *cctx;
595 1499
596 ++cctx_count; 1500 ++cctx_count;
597
598 New (0, cctx, 1, coro_cctx); 1501 New (0, cctx, 1, coro_cctx);
599 1502
600#if HAVE_MMAP 1503 cctx->gen = cctx_gen;
1504 cctx->flags = 0;
1505 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
601 1506
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1507 return cctx;
603 /* mmap supposedly does allocate-on-write for us */ 1508}
604 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605 1509
606 if (cctx->sptr == (void *)-1) 1510/* create a new cctx only suitable as source */
1511static coro_cctx *
1512cctx_new_empty (void)
1513{
1514 coro_cctx *cctx = cctx_new ();
1515
1516 cctx->stack.sptr = 0;
1517 coro_create (&cctx->cctx, 0, 0, 0, 0);
1518
1519 return cctx;
1520}
1521
1522/* create a new cctx suitable as destination/running a perl interpreter */
1523static coro_cctx *
1524cctx_new_run (void)
1525{
1526 coro_cctx *cctx = cctx_new ();
1527
1528 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
607 { 1529 {
608 perror ("FATAL: unable to mmap stack for coroutine"); 1530 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
609 _exit (EXIT_FAILURE); 1531 _exit (EXIT_FAILURE);
610 } 1532 }
611 1533
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
614# endif
615
616#else
617
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 {
623 perror ("FATAL: unable to malloc stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627#endif
628
629#if USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632 cctx->ssize + (char *)cctx->sptr
633 );
634#endif
635
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1534 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
637 1535
638 return cctx; 1536 return cctx;
639} 1537}
640 1538
641static void 1539static void
642cctx_destroy (coro_cctx *cctx) 1540cctx_destroy (coro_cctx *cctx)
643{ 1541{
644 if (!cctx) 1542 if (!cctx)
645 return; 1543 return;
646 1544
1545 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1546
647 --cctx_count; 1547 --cctx_count;
1548 coro_destroy (&cctx->cctx);
648 1549
649#if USE_VALGRIND 1550 coro_stack_free (&cctx->stack);
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr);
657#endif
658 1551
659 Safefree (cctx); 1552 Safefree (cctx);
660} 1553}
661 1554
1555/* wether this cctx should be destructed */
1556#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1557
662static coro_cctx * 1558static coro_cctx *
663cctx_get () 1559cctx_get (pTHX)
664{ 1560{
665 coro_cctx *cctx; 1561 while (ecb_expect_true (cctx_first))
666
667 if (cctx_first)
668 { 1562 {
669 cctx = cctx_first; 1563 coro_cctx *cctx = cctx_first;
670 cctx_first = cctx->next; 1564 cctx_first = cctx->next;
671 --cctx_idle; 1565 --cctx_idle;
672 } 1566
673 else 1567 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
674 { 1568 return cctx;
675 cctx = cctx_new (); 1569
676 PL_op = PL_op->op_next; 1570 cctx_destroy (cctx);
677 } 1571 }
678 1572
679 return cctx; 1573 return cctx_new_run ();
680} 1574}
681 1575
682static void 1576static void
683cctx_put (coro_cctx *cctx) 1577cctx_put (coro_cctx *cctx)
684{ 1578{
1579 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1580
685 /* free another cctx if overlimit */ 1581 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX) 1582 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
687 { 1583 {
688 coro_cctx *first = cctx_first; 1584 coro_cctx *first = cctx_first;
689 cctx_first = first->next; 1585 cctx_first = first->next;
690 --cctx_idle; 1586 --cctx_idle;
691 1587
692 assert (!first->inuse);
693 cctx_destroy (first); 1588 cctx_destroy (first);
694 } 1589 }
695 1590
696 ++cctx_idle; 1591 ++cctx_idle;
697 cctx->next = cctx_first; 1592 cctx->next = cctx_first;
698 cctx_first = cctx; 1593 cctx_first = cctx;
699} 1594}
700 1595
701/* never call directly, always through the coro_state_transfer global variable */ 1596/** coroutine switching *****************************************************/
702static void NOINLINE 1597
1598static void
703transfer (struct coro *prev, struct coro *next) 1599transfer_check (pTHX_ struct coro *prev, struct coro *next)
1600{
1601 /* TODO: throwing up here is considered harmful */
1602
1603 if (ecb_expect_true (prev != next))
1604 {
1605 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1606 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1607
1608 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1609 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1610
1611#if !PERL_VERSION_ATLEAST (5,10,0)
1612 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1613 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1614#endif
1615 }
1616}
1617
1618/* always use the TRANSFER macro */
1619static void ecb_noinline /* noinline so we have a fixed stackframe */
1620transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
704{ 1621{
705 dSTACKLEVEL; 1622 dSTACKLEVEL;
706 1623
707 /* sometimes transfer is only called to set idle_sp */ 1624 /* sometimes transfer is only called to set idle_sp */
708 if (!next) 1625 if (ecb_expect_false (!prev))
1626 {
709 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1627 cctx_current->idle_sp = STACKLEVEL;
710 else if (prev != next) 1628 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
711 { 1629 }
1630 else if (ecb_expect_true (prev != next))
1631 {
712 coro_cctx *prev__cctx; 1632 coro_cctx *cctx_prev;
713 1633
714 if (prev->flags & CF_NEW) 1634 if (ecb_expect_false (prev->flags & CF_NEW))
715 { 1635 {
716 /* create a new empty context */ 1636 /* create a new empty/source context */
717 Newz (0, prev->cctx, 1, coro_cctx);
718 prev->cctx->inuse = 1;
719 prev->flags &= ~CF_NEW; 1637 prev->flags &= ~CF_NEW;
720 prev->flags |= CF_RUNNING; 1638 prev->flags |= CF_RUNNING;
721 } 1639 }
722 1640
723 /*TODO: must not croak here */
724 if (!prev->flags & CF_RUNNING)
725 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
726
727 if (next->flags & CF_RUNNING)
728 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
729
730 prev->flags &= ~CF_RUNNING; 1641 prev->flags &= ~CF_RUNNING;
731 next->flags |= CF_RUNNING; 1642 next->flags |= CF_RUNNING;
732 1643
733 LOCK; 1644 /* first get rid of the old state */
1645 save_perl (aTHX_ prev);
734 1646
735 if (next->flags & CF_NEW) 1647 if (ecb_expect_false (next->flags & CF_NEW))
736 { 1648 {
737 /* need to start coroutine */ 1649 /* need to start coroutine */
738 next->flags &= ~CF_NEW; 1650 next->flags &= ~CF_NEW;
739 /* first get rid of the old state */
740 save_perl (prev);
741 /* setup coroutine call */ 1651 /* setup coroutine call */
742 setup_coro (next); 1652 init_perl (aTHX_ next);
743 /* need a new stack */
744 assert (!next->stack);
745 } 1653 }
746 else 1654 else
1655 load_perl (aTHX_ next);
1656
1657 /* possibly untie and reuse the cctx */
1658 if (ecb_expect_true (
1659 cctx_current->idle_sp == STACKLEVEL
1660 && !(cctx_current->flags & CC_TRACE)
1661 && !force_cctx
1662 ))
747 { 1663 {
748 /* coroutine already started */ 1664 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
749 save_perl (prev); 1665 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
750 load_perl (next); 1666
1667 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1668 /* without this the next cctx_get might destroy the running cctx while still in use */
1669 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1670 if (ecb_expect_true (!next->cctx))
1671 next->cctx = cctx_get (aTHX);
1672
1673 cctx_put (cctx_current);
751 } 1674 }
1675 else
1676 prev->cctx = cctx_current;
752 1677
753 prev__cctx = prev->cctx; 1678 ++next->usecount;
754 1679
755 /* possibly "free" the cctx */ 1680 cctx_prev = cctx_current;
756 if (prev__cctx->idle_sp == STACKLEVEL) 1681 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1682
1683 next->cctx = 0;
1684
1685 if (ecb_expect_false (cctx_prev != cctx_current))
757 { 1686 {
758 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1687 cctx_prev->top_env = PL_top_env;
759 assert (PL_top_env == prev__cctx->top_env); 1688 PL_top_env = cctx_current->top_env;
760 1689 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
761 prev->cctx = 0;
762
763 cctx_put (prev__cctx);
764 prev__cctx->inuse = 0;
765 } 1690 }
766 1691
767 if (!next->cctx) 1692 transfer_tail (aTHX);
768 {
769 next->cctx = cctx_get ();
770 assert (!next->cctx->inuse);
771 next->cctx->inuse = 1;
772 }
773
774 if (prev__cctx != next->cctx)
775 {
776 prev__cctx->top_env = PL_top_env;
777 PL_top_env = next->cctx->top_env;
778 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
779 }
780
781 free_coro_mortal ();
782
783 UNLOCK;
784 } 1693 }
785} 1694}
786 1695
787struct transfer_args 1696#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
788{
789 struct coro *prev, *next;
790};
791
792#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1697#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
793 1698
1699/** high level stuff ********************************************************/
1700
1701/* this function is actually Coro, not Coro::State, but we call it from here */
1702/* because it is convenient - but it hasn't been declared yet for that reason */
794static void 1703static void
1704coro_call_on_destroy (pTHX_ struct coro *coro);
1705
1706static void
795coro_state_destroy (struct coro *coro) 1707coro_state_destroy (pTHX_ struct coro *coro)
796{ 1708{
797 if (coro->refcnt--) 1709 if (coro->flags & CF_ZOMBIE)
798 return; 1710 return;
799 1711
800 if (coro->mainstack && coro->mainstack != main_mainstack) 1712 slf_destroy (aTHX_ coro);
801 {
802 struct coro temp;
803 Zero (&temp, 1, struct coro);
804 temp.save = CORO_SAVE_ALL;
805 1713
1714 coro->flags |= CF_ZOMBIE;
1715
806 if (coro->flags & CF_RUNNING) 1716 if (coro->flags & CF_READY)
807 croak ("FATAL: tried to destroy currently running coroutine");
808
809 save_perl (&temp);
810 load_perl (coro);
811
812 coro_destroy_stacks ();
813
814 load_perl (&temp); /* this will get rid of defsv etc.. */
815
816 coro->mainstack = 0;
817 } 1717 {
1718 /* reduce nready, as destroying a ready coro effectively unreadies it */
1719 /* alternative: look through all ready queues and remove the coro */
1720 --coro_nready;
1721 }
1722 else
1723 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1724
1725 if (coro->next) coro->next->prev = coro->prev;
1726 if (coro->prev) coro->prev->next = coro->next;
1727 if (coro == coro_first) coro_first = coro->next;
1728
1729 if (coro->mainstack
1730 && coro->mainstack != main_mainstack
1731 && coro->slot
1732 && !PL_dirty)
1733 destroy_perl (aTHX_ coro);
818 1734
819 cctx_destroy (coro->cctx); 1735 cctx_destroy (coro->cctx);
1736 SvREFCNT_dec (coro->startcv);
820 SvREFCNT_dec (coro->args); 1737 SvREFCNT_dec (coro->args);
821 Safefree (coro); 1738 SvREFCNT_dec (coro->swap_sv);
1739 SvREFCNT_dec (CORO_THROW);
1740
1741 coro_call_on_destroy (aTHX_ coro);
1742
1743 /* more destruction mayhem in coro_state_free */
822} 1744}
823 1745
824static int 1746static int
825coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1747coro_state_free (pTHX_ SV *sv, MAGIC *mg)
826{ 1748{
827 struct coro *coro = (struct coro *)mg->mg_ptr; 1749 struct coro *coro = (struct coro *)mg->mg_ptr;
828 mg->mg_ptr = 0; 1750 mg->mg_ptr = 0;
829 1751
830 coro_state_destroy (coro); 1752 coro_state_destroy (aTHX_ coro);
1753 SvREFCNT_dec (coro->on_destroy);
1754 SvREFCNT_dec (coro->status);
1755
1756 Safefree (coro);
831 1757
832 return 0; 1758 return 0;
833} 1759}
834 1760
835static int 1761static int ecb_cold
836coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1762coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
837{ 1763{
838 struct coro *coro = (struct coro *)mg->mg_ptr; 1764 /* called when perl clones the current process the slow way (windows process emulation) */
839 1765 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
840 ++coro->refcnt; 1766 mg->mg_ptr = 0;
1767 mg->mg_virtual = 0;
841 1768
842 return 0; 1769 return 0;
843} 1770}
844 1771
845static MGVTBL coro_state_vtbl = { 1772static MGVTBL coro_state_vtbl = {
846 0, 0, 0, 0, 1773 0, 0, 0, 0,
847 coro_state_clear, 1774 coro_state_free,
848 0, 1775 0,
849#ifdef MGf_DUP 1776#ifdef MGf_DUP
850 coro_state_dup, 1777 coro_state_dup,
851#else 1778#else
852# define MGf_DUP 0 1779# define MGf_DUP 0
853#endif 1780#endif
854}; 1781};
855 1782
856static struct coro *
857SvSTATE (SV *coro)
858{
859 HV *stash;
860 MAGIC *mg;
861
862 if (SvROK (coro))
863 coro = SvRV (coro);
864
865 stash = SvSTASH (coro);
866 if (stash != coro_stash && stash != coro_state_stash)
867 {
868 /* very slow, but rare, check */
869 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
870 croak ("Coro::State object required");
871 }
872
873 mg = SvMAGIC (coro);
874 assert (mg->mg_type == PERL_MAGIC_ext);
875 return (struct coro *)mg->mg_ptr;
876}
877
878static void 1783static void
879prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1784prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
880{ 1785{
881 ta->prev = SvSTATE (prev_sv); 1786 ta->prev = SvSTATE (prev_sv);
882 ta->next = SvSTATE (next_sv); 1787 ta->next = SvSTATE (next_sv);
1788 TRANSFER_CHECK (*ta);
883} 1789}
884 1790
885static void 1791static void
886api_transfer (SV *prev_sv, SV *next_sv) 1792api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
887{ 1793{
888 struct transfer_args ta; 1794 struct coro_transfer_args ta;
889 1795
890 prepare_transfer (&ta, prev_sv, next_sv); 1796 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
891 TRANSFER (ta); 1797 TRANSFER (ta, 1);
1798}
1799
1800/** Coro ********************************************************************/
1801
1802ecb_inline void
1803coro_enq (pTHX_ struct coro *coro)
1804{
1805 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1806
1807 SvREFCNT_inc_NN (coro->hv);
1808
1809 coro->next_ready = 0;
1810 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1811 ready [1] = coro;
1812}
1813
1814ecb_inline struct coro *
1815coro_deq (pTHX)
1816{
1817 int prio;
1818
1819 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1820 {
1821 struct coro **ready = coro_ready [prio];
1822
1823 if (ready [0])
1824 {
1825 struct coro *coro = ready [0];
1826 ready [0] = coro->next_ready;
1827 return coro;
1828 }
1829 }
1830
1831 return 0;
1832}
1833
1834static void
1835invoke_sv_ready_hook_helper (void)
1836{
1837 dTHX;
1838 dSP;
1839
1840 ENTER;
1841 SAVETMPS;
1842
1843 PUSHMARK (SP);
1844 PUTBACK;
1845 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1846
1847 FREETMPS;
1848 LEAVE;
892} 1849}
893 1850
894static int 1851static int
895api_save (SV *coro_sv, int new_save) 1852api_ready (pTHX_ SV *coro_sv)
896{ 1853{
897 struct coro *coro = SvSTATE (coro_sv); 1854 struct coro *coro = SvSTATE (coro_sv);
898 int old_save = coro->save;
899
900 if (new_save >= 0)
901 coro->save = new_save;
902
903 return old_save;
904}
905
906/** Coro ********************************************************************/
907
908#define PRIO_MAX 3
909#define PRIO_HIGH 1
910#define PRIO_NORMAL 0
911#define PRIO_LOW -1
912#define PRIO_IDLE -3
913#define PRIO_MIN -4
914
915/* for Coro.pm */
916static SV *coro_current;
917static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918static int coro_nready;
919
920static void
921coro_enq (SV *coro_sv)
922{
923 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
924 coro_nready++;
925}
926
927static SV *
928coro_deq (int min_prio)
929{
930 int prio = PRIO_MAX - PRIO_MIN;
931
932 min_prio -= PRIO_MIN;
933 if (min_prio < 0)
934 min_prio = 0;
935
936 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
937 if (AvFILLp (coro_ready [prio]) >= 0)
938 {
939 coro_nready--;
940 return av_shift (coro_ready [prio]);
941 }
942
943 return 0;
944}
945
946static int
947api_ready (SV *coro_sv)
948{
949 struct coro *coro;
950
951 if (SvROK (coro_sv))
952 coro_sv = SvRV (coro_sv);
953
954 coro = SvSTATE (coro_sv);
955 1855
956 if (coro->flags & CF_READY) 1856 if (coro->flags & CF_READY)
957 return 0; 1857 return 0;
958 1858
959#if 0 /* this is actually harmless */ 1859 coro->flags |= CF_READY;
1860
1861 coro_enq (aTHX_ coro);
1862
1863 if (!coro_nready++)
1864 if (coroapi.readyhook)
1865 coroapi.readyhook ();
1866
1867 return 1;
1868}
1869
1870static int
1871api_is_ready (pTHX_ SV *coro_sv)
1872{
1873 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1874}
1875
1876/* expects to own a reference to next->hv */
1877ecb_inline void
1878prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1879{
1880 SV *prev_sv = SvRV (coro_current);
1881
1882 ta->prev = SvSTATE_hv (prev_sv);
1883 ta->next = next;
1884
1885 TRANSFER_CHECK (*ta);
1886
1887 SvRV_set (coro_current, (SV *)next->hv);
1888
1889 free_coro_mortal (aTHX);
1890 coro_mortal = prev_sv;
1891}
1892
1893static void
1894prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1895{
1896 for (;;)
1897 {
1898 struct coro *next = coro_deq (aTHX);
1899
1900 if (ecb_expect_true (next))
1901 {
1902 /* cannot transfer to destroyed coros, skip and look for next */
1903 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1904 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1905 else
1906 {
1907 next->flags &= ~CF_READY;
1908 --coro_nready;
1909
1910 prepare_schedule_to (aTHX_ ta, next);
1911 break;
1912 }
1913 }
1914 else
1915 {
1916 /* nothing to schedule: call the idle handler */
1917 if (SvROK (sv_idle)
1918 && SvOBJECT (SvRV (sv_idle)))
1919 {
1920 if (SvRV (sv_idle) == SvRV (coro_current))
1921 {
1922 require_pv ("Carp");
1923
1924 {
1925 dSP;
1926
1927 ENTER;
1928 SAVETMPS;
1929
1930 PUSHMARK (SP);
1931 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1932 PUTBACK;
1933 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1934
1935 FREETMPS;
1936 LEAVE;
1937 }
1938 }
1939
1940 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1941 api_ready (aTHX_ SvRV (sv_idle));
1942 --coro_nready;
1943 }
1944 else
1945 {
1946 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1947 dSP;
1948
1949 ENTER;
1950 SAVETMPS;
1951
1952 PUSHMARK (SP);
1953 PUTBACK;
1954 call_sv (sv_idle, G_VOID | G_DISCARD);
1955
1956 FREETMPS;
1957 LEAVE;
1958 }
1959 }
1960 }
1961}
1962
1963ecb_inline void
1964prepare_cede (pTHX_ struct coro_transfer_args *ta)
1965{
1966 api_ready (aTHX_ coro_current);
1967 prepare_schedule (aTHX_ ta);
1968}
1969
1970ecb_inline void
1971prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1972{
1973 SV *prev = SvRV (coro_current);
1974
1975 if (coro_nready)
1976 {
1977 prepare_schedule (aTHX_ ta);
1978 api_ready (aTHX_ prev);
1979 }
1980 else
1981 prepare_nop (aTHX_ ta);
1982}
1983
1984static void
1985api_schedule (pTHX)
1986{
1987 struct coro_transfer_args ta;
1988
1989 prepare_schedule (aTHX_ &ta);
1990 TRANSFER (ta, 1);
1991}
1992
1993static void
1994api_schedule_to (pTHX_ SV *coro_sv)
1995{
1996 struct coro_transfer_args ta;
1997 struct coro *next = SvSTATE (coro_sv);
1998
1999 SvREFCNT_inc_NN (coro_sv);
2000 prepare_schedule_to (aTHX_ &ta, next);
2001}
2002
2003static int
2004api_cede (pTHX)
2005{
2006 struct coro_transfer_args ta;
2007
2008 prepare_cede (aTHX_ &ta);
2009
2010 if (ecb_expect_true (ta.prev != ta.next))
2011 {
2012 TRANSFER (ta, 1);
2013 return 1;
2014 }
2015 else
2016 return 0;
2017}
2018
2019static int
2020api_cede_notself (pTHX)
2021{
2022 if (coro_nready)
2023 {
2024 struct coro_transfer_args ta;
2025
2026 prepare_cede_notself (aTHX_ &ta);
2027 TRANSFER (ta, 1);
2028 return 1;
2029 }
2030 else
2031 return 0;
2032}
2033
2034static void
2035api_trace (pTHX_ SV *coro_sv, int flags)
2036{
2037 struct coro *coro = SvSTATE (coro_sv);
2038
960 if (coro->flags & CF_RUNNING) 2039 if (coro->flags & CF_RUNNING)
961 croak ("Coro::ready called on currently running coroutine"); 2040 croak ("cannot enable tracing on a running coroutine, caught");
962#endif
963 2041
964 coro->flags |= CF_READY; 2042 if (flags & CC_TRACE)
2043 {
2044 if (!coro->cctx)
2045 coro->cctx = cctx_new_run ();
2046 else if (!(coro->cctx->flags & CC_TRACE))
2047 croak ("cannot enable tracing on coroutine with custom stack, caught");
965 2048
966 LOCK; 2049 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
967 coro_enq (SvREFCNT_inc (coro_sv)); 2050 }
968 UNLOCK; 2051 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2052 {
2053 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2054
2055 if (coro->flags & CF_RUNNING)
2056 PL_runops = RUNOPS_DEFAULT;
2057 else
2058 coro->slot->runops = RUNOPS_DEFAULT;
2059 }
2060}
2061
2062static void
2063coro_push_av (pTHX_ AV *av, I32 gimme_v)
2064{
2065 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2066 {
2067 dSP;
2068
2069 if (gimme_v == G_SCALAR)
2070 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2071 else
2072 {
2073 int i;
2074 EXTEND (SP, AvFILLp (av) + 1);
2075
2076 for (i = 0; i <= AvFILLp (av); ++i)
2077 PUSHs (AvARRAY (av)[i]);
2078 }
2079
2080 PUTBACK;
2081 }
2082}
2083
2084static void
2085coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2086{
2087 if (!coro->on_destroy)
2088 coro->on_destroy = newAV ();
2089
2090 av_push (coro->on_destroy, cb);
2091}
2092
2093static void
2094slf_destroy_join (pTHX_ struct CoroSLF *frame)
2095{
2096 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2097}
2098
2099static int
2100slf_check_join (pTHX_ struct CoroSLF *frame)
2101{
2102 struct coro *coro = (struct coro *)frame->data;
2103
2104 if (!coro->status)
2105 return 1;
2106
2107 frame->destroy = 0;
2108
2109 coro_push_av (aTHX_ coro->status, GIMME_V);
2110
2111 SvREFCNT_dec ((SV *)coro->hv);
2112
2113 return 0;
2114}
2115
2116static void
2117slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2118{
2119 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2120
2121 if (items > 1)
2122 croak ("join called with too many arguments");
2123
2124 if (coro->status)
2125 frame->prepare = prepare_nop;
2126 else
2127 {
2128 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2129 frame->prepare = prepare_schedule;
2130 }
2131
2132 frame->check = slf_check_join;
2133 frame->destroy = slf_destroy_join;
2134 frame->data = (void *)coro;
2135 SvREFCNT_inc (coro->hv);
2136}
2137
2138static void
2139coro_call_on_destroy (pTHX_ struct coro *coro)
2140{
2141 AV *od = coro->on_destroy;
2142
2143 if (!od)
2144 return;
2145
2146 coro->on_destroy = 0;
2147 sv_2mortal ((SV *)od);
2148
2149 while (AvFILLp (od) >= 0)
2150 {
2151 SV *cb = sv_2mortal (av_pop (od));
2152
2153 /* coro hv's (and only hv's at the moment) are supported as well */
2154 if (SvSTATEhv_p (aTHX_ cb))
2155 api_ready (aTHX_ cb);
2156 else
2157 {
2158 dSP; /* don't disturb outer sp */
2159 PUSHMARK (SP);
2160
2161 if (coro->status)
2162 {
2163 PUTBACK;
2164 coro_push_av (aTHX_ coro->status, G_ARRAY);
2165 SPAGAIN;
2166 }
2167
2168 PUTBACK;
2169 call_sv (cb, G_VOID | G_DISCARD);
2170 }
2171 }
2172}
2173
2174static void
2175coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2176{
2177 AV *av;
2178
2179 if (coro->status)
2180 {
2181 av = coro->status;
2182 av_clear (av);
2183 }
2184 else
2185 av = coro->status = newAV ();
2186
2187 /* items are actually not so common, so optimise for this case */
2188 if (items)
2189 {
2190 int i;
2191
2192 av_extend (av, items - 1);
2193
2194 for (i = 0; i < items; ++i)
2195 av_push (av, SvREFCNT_inc_NN (arg [i]));
2196 }
2197}
2198
2199static void
2200slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2201{
2202 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2203 api_ready (aTHX_ sv_manager);
2204
2205 frame->prepare = prepare_schedule;
2206 frame->check = slf_check_repeat;
2207
2208 /* as a minor optimisation, we could unwind all stacks here */
2209 /* but that puts extra pressure on pp_slf, and is not worth much */
2210 /*coro_unwind_stacks (aTHX);*/
2211}
2212
2213static void
2214slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2215{
2216 HV *coro_hv = (HV *)SvRV (coro_current);
2217
2218 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2219 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2220}
2221
2222static void
2223slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2224{
2225 HV *coro_hv;
2226 struct coro *coro;
2227
2228 if (items <= 0)
2229 croak ("Coro::cancel called without coro object,");
2230
2231 coro = SvSTATE (arg [0]);
2232 coro_hv = coro->hv;
2233
2234 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2235
2236 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2237 {
2238 /* coro currently busy cancelling something, so just notify it */
2239 coro->slf_frame.data = (void *)coro;
2240
2241 frame->prepare = prepare_nop;
2242 frame->check = slf_check_nop;
2243 }
2244 else if (coro_hv == (HV *)SvRV (coro_current))
2245 {
2246 /* cancelling the current coro is allowed, and equals terminate */
2247 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2248 }
2249 else
2250 {
2251 struct coro *self = SvSTATE_current;
2252
2253 /* otherwise we cancel directly, purely for speed reasons
2254 * unfortunately, this requires some magic trickery, as
2255 * somebody else could cancel us, so we have to fight the cancellation.
2256 * this is ugly, and hopefully fully worth the extra speed.
2257 * besides, I can't get the slow-but-safe version working...
2258 */
2259 slf_frame.data = 0;
2260 self->flags |= CF_NOCANCEL;
2261 coro_state_destroy (aTHX_ coro);
2262 self->flags &= ~CF_NOCANCEL;
2263
2264 if (slf_frame.data)
2265 {
2266 /* while we were busy we have been cancelled, so terminate */
2267 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2268 }
2269 else
2270 {
2271 frame->prepare = prepare_nop;
2272 frame->check = slf_check_nop;
2273 }
2274 }
2275}
2276
2277static int
2278slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2279{
2280 frame->prepare = 0;
2281 coro_unwind_stacks (aTHX);
2282
2283 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
969 2284
970 return 1; 2285 return 1;
971} 2286}
972 2287
973static int 2288static int
974api_is_ready (SV *coro_sv) 2289safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
975{ 2290{
976 return !!SvSTATE (coro_sv)->flags & CF_READY; 2291 if (coro->cctx)
977} 2292 croak ("coro inside C callback, unable to cancel at this time, caught");
978 2293
979static void 2294 if (coro->flags & CF_NEW)
980prepare_schedule (struct transfer_args *ta) 2295 {
981{ 2296 coro_set_status (aTHX_ coro, arg, items);
982 SV *prev, *next; 2297 coro_state_destroy (aTHX_ coro);
983
984 for (;;)
985 { 2298 }
986 LOCK; 2299 else
987 next = coro_deq (PRIO_MIN); 2300 {
988 UNLOCK; 2301 if (!coro->slf_frame.prepare)
2302 croak ("coro outside an SLF function, unable to cancel at this time, caught");
989 2303
990 if (next) 2304 slf_destroy (aTHX_ coro);
991 break; 2305
2306 coro_set_status (aTHX_ coro, arg, items);
2307 coro->slf_frame.prepare = prepare_nop;
2308 coro->slf_frame.check = slf_check_safe_cancel;
2309
2310 api_ready (aTHX_ (SV *)coro->hv);
2311 }
2312
2313 return 1;
2314}
2315
2316/*****************************************************************************/
2317/* async pool handler */
2318
2319static int
2320slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2321{
2322 HV *hv = (HV *)SvRV (coro_current);
2323 struct coro *coro = (struct coro *)frame->data;
2324
2325 if (!coro->invoke_cb)
2326 return 1; /* loop till we have invoke */
2327 else
2328 {
2329 hv_store (hv, "desc", sizeof ("desc") - 1,
2330 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2331
2332 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
992 2333
993 { 2334 {
994 dSP; 2335 dSP;
995 2336 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
996 ENTER;
997 SAVETMPS;
998
999 PUSHMARK (SP);
1000 PUTBACK; 2337 PUTBACK;
1001 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1002
1003 FREETMPS;
1004 LEAVE;
1005 } 2338 }
2339
2340 SvREFCNT_dec (GvAV (PL_defgv));
2341 GvAV (PL_defgv) = coro->invoke_av;
2342 coro->invoke_av = 0;
2343
2344 return 0;
2345 }
2346}
2347
2348static void
2349slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 HV *hv = (HV *)SvRV (coro_current);
2352 struct coro *coro = SvSTATE_hv ((SV *)hv);
2353
2354 if (ecb_expect_true (coro->saved_deffh))
1006 } 2355 {
2356 /* subsequent iteration */
2357 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2358 coro->saved_deffh = 0;
1007 2359
2360 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2361 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2362 {
2363 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2364 return;
2365 }
2366 else
2367 {
2368 av_clear (GvAV (PL_defgv));
2369 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2370
2371 coro->prio = 0;
2372
2373 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2374 api_trace (aTHX_ coro_current, 0);
2375
2376 frame->prepare = prepare_schedule;
2377 av_push (av_async_pool, SvREFCNT_inc (hv));
2378 }
2379 }
2380 else
2381 {
2382 /* first iteration, simply fall through */
2383 frame->prepare = prepare_nop;
2384 }
2385
2386 frame->check = slf_check_pool_handler;
2387 frame->data = (void *)coro;
2388}
2389
2390/*****************************************************************************/
2391/* rouse callback */
2392
2393#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2394
2395static void
2396coro_rouse_callback (pTHX_ CV *cv)
2397{
2398 dXSARGS;
2399 SV *data = (SV *)S_GENSUB_ARG;
2400
2401 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2402 {
2403 /* first call, set args */
2404 SV *coro = SvRV (data);
2405 AV *av = newAV ();
2406
2407 SvRV_set (data, (SV *)av);
2408
2409 /* better take a full copy of the arguments */
2410 while (items--)
2411 av_store (av, items, newSVsv (ST (items)));
2412
2413 api_ready (aTHX_ coro);
2414 SvREFCNT_dec (coro);
2415 }
2416
2417 XSRETURN_EMPTY;
2418}
2419
2420static int
2421slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2422{
2423 SV *data = (SV *)frame->data;
2424
2425 if (CORO_THROW)
2426 return 0;
2427
2428 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2429 return 1;
2430
2431 /* now push all results on the stack */
2432 {
2433 dSP;
2434 AV *av = (AV *)SvRV (data);
2435 int i;
2436
2437 EXTEND (SP, AvFILLp (av) + 1);
2438 for (i = 0; i <= AvFILLp (av); ++i)
2439 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2440
2441 /* we have stolen the elements, so set length to zero and free */
2442 AvFILLp (av) = -1;
2443 av_undef (av);
2444
2445 PUTBACK;
2446 }
2447
2448 return 0;
2449}
2450
2451static void
2452slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 SV *cb;
2455
2456 if (items)
2457 cb = arg [0];
2458 else
2459 {
2460 struct coro *coro = SvSTATE_current;
2461
2462 if (!coro->rouse_cb)
2463 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2464
2465 cb = sv_2mortal (coro->rouse_cb);
2466 coro->rouse_cb = 0;
2467 }
2468
2469 if (!SvROK (cb)
2470 || SvTYPE (SvRV (cb)) != SVt_PVCV
2471 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2472 croak ("Coro::rouse_wait called with illegal callback argument,");
2473
2474 {
2475 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2476 SV *data = (SV *)S_GENSUB_ARG;
2477
2478 frame->data = (void *)data;
2479 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2480 frame->check = slf_check_rouse_wait;
2481 }
2482}
2483
2484static SV *
2485coro_new_rouse_cb (pTHX)
2486{
1008 prev = SvRV (coro_current); 2487 HV *hv = (HV *)SvRV (coro_current);
1009 SvRV_set (coro_current, next); 2488 struct coro *coro = SvSTATE_hv (hv);
2489 SV *data = newRV_inc ((SV *)hv);
2490 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
1010 2491
1011 /* free this only after the transfer */ 2492 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1012 LOCK; 2493 SvREFCNT_dec (data); /* magicext increases the refcount */
1013 free_coro_mortal ();
1014 UNLOCK;
1015 coro_mortal = prev;
1016 2494
1017 assert (!SvROK(prev));//D 2495 SvREFCNT_dec (coro->rouse_cb);
1018 assert (!SvROK(next));//D 2496 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1019 2497
1020 ta->prev = SvSTATE (prev); 2498 return cb;
1021 ta->next = SvSTATE (next);
1022
1023 assert (ta->next->flags & CF_READY);
1024 ta->next->flags &= ~CF_READY;
1025} 2499}
1026 2500
2501/*****************************************************************************/
2502/* schedule-like-function opcode (SLF) */
2503
2504static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2505static const CV *slf_cv;
2506static SV **slf_argv;
2507static int slf_argc, slf_arga; /* count, allocated */
2508static I32 slf_ax; /* top of stack, for restore */
2509
2510/* this restores the stack in the case we patched the entersub, to */
2511/* recreate the stack frame as perl will on following calls */
2512/* since entersub cleared the stack */
2513static OP *
2514pp_restore (pTHX)
2515{
2516 int i;
2517 SV **SP = PL_stack_base + slf_ax;
2518
2519 PUSHMARK (SP);
2520
2521 EXTEND (SP, slf_argc + 1);
2522
2523 for (i = 0; i < slf_argc; ++i)
2524 PUSHs (sv_2mortal (slf_argv [i]));
2525
2526 PUSHs ((SV *)CvGV (slf_cv));
2527
2528 RETURNOP (slf_restore.op_first);
2529}
2530
1027static void 2531static void
2532slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2533{
2534 SV **arg = (SV **)slf_frame.data;
2535
2536 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2537}
2538
2539static void
2540slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 if (items != 2)
2543 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2544
2545 frame->prepare = slf_prepare_transfer;
2546 frame->check = slf_check_nop;
2547 frame->data = (void *)arg; /* let's hope it will stay valid */
2548}
2549
2550static void
2551slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2552{
2553 frame->prepare = prepare_schedule;
2554 frame->check = slf_check_nop;
2555}
2556
2557static void
1028prepare_cede (struct transfer_args *ta) 2558slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1029{ 2559{
2560 struct coro *next = (struct coro *)slf_frame.data;
2561
2562 SvREFCNT_inc_NN (next->hv);
2563 prepare_schedule_to (aTHX_ ta, next);
2564}
2565
2566static void
2567slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2568{
2569 if (!items)
2570 croak ("Coro::schedule_to expects a coroutine argument, caught");
2571
2572 frame->data = (void *)SvSTATE (arg [0]);
2573 frame->prepare = slf_prepare_schedule_to;
2574 frame->check = slf_check_nop;
2575}
2576
2577static void
2578slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2579{
1030 api_ready (coro_current); 2580 api_ready (aTHX_ SvRV (coro_current));
1031 2581
1032 prepare_schedule (ta); 2582 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1033} 2583}
1034 2584
1035static void 2585static void
1036api_schedule (void) 2586slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1037{ 2587{
2588 frame->prepare = prepare_cede;
2589 frame->check = slf_check_nop;
2590}
2591
2592static void
2593slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2594{
2595 frame->prepare = prepare_cede_notself;
2596 frame->check = slf_check_nop;
2597}
2598
2599/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2600static void
2601slf_destroy (pTHX_ struct coro *coro)
2602{
2603 /* this callback is reserved for slf functions needing to do cleanup */
2604 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2605 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2606
2607 /*
2608 * The on_destroy above most likely is from an SLF call.
2609 * Since by definition the SLF call will not finish when we destroy
2610 * the coro, we will have to force-finish it here, otherwise
2611 * cleanup functions cannot call SLF functions.
2612 */
2613 coro->slf_frame.prepare = 0;
2614}
2615
2616/*
2617 * these not obviously related functions are all rolled into one
2618 * function to increase chances that they all will call transfer with the same
2619 * stack offset
2620 * SLF stands for "schedule-like-function".
2621 */
2622static OP *
2623pp_slf (pTHX)
2624{
2625 I32 checkmark; /* mark SP to see how many elements check has pushed */
2626
2627 /* set up the slf frame, unless it has already been set-up */
2628 /* the latter happens when a new coro has been started */
2629 /* or when a new cctx was attached to an existing coroutine */
2630 if (ecb_expect_true (!slf_frame.prepare))
2631 {
2632 /* first iteration */
2633 dSP;
2634 SV **arg = PL_stack_base + TOPMARK + 1;
2635 int items = SP - arg; /* args without function object */
2636 SV *gv = *sp;
2637
2638 /* do a quick consistency check on the "function" object, and if it isn't */
2639 /* for us, divert to the real entersub */
2640 if (SvTYPE (gv) != SVt_PVGV
2641 || !GvCV (gv)
2642 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2643 return PL_ppaddr[OP_ENTERSUB](aTHX);
2644
2645 if (!(PL_op->op_flags & OPf_STACKED))
2646 {
2647 /* ampersand-form of call, use @_ instead of stack */
2648 AV *av = GvAV (PL_defgv);
2649 arg = AvARRAY (av);
2650 items = AvFILLp (av) + 1;
2651 }
2652
2653 /* now call the init function, which needs to set up slf_frame */
2654 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2655 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2656
2657 /* pop args */
2658 SP = PL_stack_base + POPMARK;
2659
2660 PUTBACK;
2661 }
2662
2663 /* now that we have a slf_frame, interpret it! */
2664 /* we use a callback system not to make the code needlessly */
2665 /* complicated, but so we can run multiple perl coros from one cctx */
2666
2667 do
2668 {
1038 struct transfer_args ta; 2669 struct coro_transfer_args ta;
1039 2670
1040 prepare_schedule (&ta); 2671 slf_frame.prepare (aTHX_ &ta);
1041 TRANSFER (ta); 2672 TRANSFER (ta, 0);
1042}
1043 2673
2674 checkmark = PL_stack_sp - PL_stack_base;
2675 }
2676 while (slf_frame.check (aTHX_ &slf_frame));
2677
2678 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2679
2680 /* exception handling */
2681 if (ecb_expect_false (CORO_THROW))
2682 {
2683 SV *exception = sv_2mortal (CORO_THROW);
2684
2685 CORO_THROW = 0;
2686 sv_setsv (ERRSV, exception);
2687 croak (0);
2688 }
2689
2690 /* return value handling - mostly like entersub */
2691 /* make sure we put something on the stack in scalar context */
2692 if (GIMME_V == G_SCALAR
2693 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2694 {
2695 dSP;
2696 SV **bot = PL_stack_base + checkmark;
2697
2698 if (sp == bot) /* too few, push undef */
2699 bot [1] = &PL_sv_undef;
2700 else /* too many, take last one */
2701 bot [1] = *sp;
2702
2703 SP = bot + 1;
2704
2705 PUTBACK;
2706 }
2707
2708 return NORMAL;
2709}
2710
2711static void
2712api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2713{
2714 int i;
2715 SV **arg = PL_stack_base + ax;
2716 int items = PL_stack_sp - arg + 1;
2717
2718 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2719
2720 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2721 && PL_op->op_ppaddr != pp_slf)
2722 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2723
2724 CvFLAGS (cv) |= CVf_SLF;
2725 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2726 slf_cv = cv;
2727
2728 /* we patch the op, and then re-run the whole call */
2729 /* we have to put the same argument on the stack for this to work */
2730 /* and this will be done by pp_restore */
2731 slf_restore.op_next = (OP *)&slf_restore;
2732 slf_restore.op_type = OP_CUSTOM;
2733 slf_restore.op_ppaddr = pp_restore;
2734 slf_restore.op_first = PL_op;
2735
2736 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2737
2738 if (PL_op->op_flags & OPf_STACKED)
2739 {
2740 if (items > slf_arga)
2741 {
2742 slf_arga = items;
2743 Safefree (slf_argv);
2744 New (0, slf_argv, slf_arga, SV *);
2745 }
2746
2747 slf_argc = items;
2748
2749 for (i = 0; i < items; ++i)
2750 slf_argv [i] = SvREFCNT_inc (arg [i]);
2751 }
2752 else
2753 slf_argc = 0;
2754
2755 PL_op->op_ppaddr = pp_slf;
2756 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2757
2758 PL_op = (OP *)&slf_restore;
2759}
2760
2761/*****************************************************************************/
2762/* dynamic wind */
2763
2764static void
2765on_enterleave_call (pTHX_ SV *cb)
2766{
2767 dSP;
2768
2769 PUSHSTACK;
2770
2771 PUSHMARK (SP);
2772 PUTBACK;
2773 call_sv (cb, G_VOID | G_DISCARD);
2774 SPAGAIN;
2775
2776 POPSTACK;
2777}
2778
2779static SV *
2780coro_avp_pop_and_free (pTHX_ AV **avp)
2781{
2782 AV *av = *avp;
2783 SV *res = av_pop (av);
2784
2785 if (AvFILLp (av) < 0)
2786 {
2787 *avp = 0;
2788 SvREFCNT_dec (av);
2789 }
2790
2791 return res;
2792}
2793
2794static void
2795coro_pop_on_enter (pTHX_ void *coro)
2796{
2797 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2798 SvREFCNT_dec (cb);
2799}
2800
2801static void
2802coro_pop_on_leave (pTHX_ void *coro)
2803{
2804 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2805 on_enterleave_call (aTHX_ sv_2mortal (cb));
2806}
2807
2808/*****************************************************************************/
2809/* PerlIO::cede */
2810
2811typedef struct
2812{
2813 PerlIOBuf base;
2814 NV next, every;
2815} PerlIOCede;
2816
2817static IV ecb_cold
2818PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2819{
2820 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2821
2822 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2823 self->next = nvtime () + self->every;
2824
2825 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2826}
2827
2828static SV * ecb_cold
2829PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2830{
2831 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2832
2833 return newSVnv (self->every);
2834}
2835
2836static IV
2837PerlIOCede_flush (pTHX_ PerlIO *f)
2838{
2839 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2840 double now = nvtime ();
2841
2842 if (now >= self->next)
2843 {
2844 api_cede (aTHX);
2845 self->next = now + self->every;
2846 }
2847
2848 return PerlIOBuf_flush (aTHX_ f);
2849}
2850
2851static PerlIO_funcs PerlIO_cede =
2852{
2853 sizeof(PerlIO_funcs),
2854 "cede",
2855 sizeof(PerlIOCede),
2856 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2857 PerlIOCede_pushed,
2858 PerlIOBuf_popped,
2859 PerlIOBuf_open,
2860 PerlIOBase_binmode,
2861 PerlIOCede_getarg,
2862 PerlIOBase_fileno,
2863 PerlIOBuf_dup,
2864 PerlIOBuf_read,
2865 PerlIOBuf_unread,
2866 PerlIOBuf_write,
2867 PerlIOBuf_seek,
2868 PerlIOBuf_tell,
2869 PerlIOBuf_close,
2870 PerlIOCede_flush,
2871 PerlIOBuf_fill,
2872 PerlIOBase_eof,
2873 PerlIOBase_error,
2874 PerlIOBase_clearerr,
2875 PerlIOBase_setlinebuf,
2876 PerlIOBuf_get_base,
2877 PerlIOBuf_bufsiz,
2878 PerlIOBuf_get_ptr,
2879 PerlIOBuf_get_cnt,
2880 PerlIOBuf_set_ptrcnt,
2881};
2882
2883/*****************************************************************************/
2884/* Coro::Semaphore & Coro::Signal */
2885
2886static SV *
2887coro_waitarray_new (pTHX_ int count)
2888{
2889 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2890 AV *av = newAV ();
2891 SV **ary;
2892
2893 /* unfortunately, building manually saves memory */
2894 Newx (ary, 2, SV *);
2895 AvALLOC (av) = ary;
2896#if PERL_VERSION_ATLEAST (5,10,0)
2897 AvARRAY (av) = ary;
2898#else
2899 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2900 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2901 SvPVX ((SV *)av) = (char *)ary;
2902#endif
2903 AvMAX (av) = 1;
2904 AvFILLp (av) = 0;
2905 ary [0] = newSViv (count);
2906
2907 return newRV_noinc ((SV *)av);
2908}
2909
2910/* semaphore */
2911
2912static void
2913coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2914{
2915 SV *count_sv = AvARRAY (av)[0];
2916 IV count = SvIVX (count_sv);
2917
2918 count += adjust;
2919 SvIVX (count_sv) = count;
2920
2921 /* now wake up as many waiters as are expected to lock */
2922 while (count > 0 && AvFILLp (av) > 0)
2923 {
2924 SV *cb;
2925
2926 /* swap first two elements so we can shift a waiter */
2927 AvARRAY (av)[0] = AvARRAY (av)[1];
2928 AvARRAY (av)[1] = count_sv;
2929 cb = av_shift (av);
2930
2931 if (SvOBJECT (cb))
2932 {
2933 api_ready (aTHX_ cb);
2934 --count;
2935 }
2936 else if (SvTYPE (cb) == SVt_PVCV)
2937 {
2938 dSP;
2939 PUSHMARK (SP);
2940 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2941 PUTBACK;
2942 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2943 }
2944
2945 SvREFCNT_dec (cb);
2946 }
2947}
2948
2949static void
2950coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2951{
2952 /* call $sem->adjust (0) to possibly wake up some other waiters */
2953 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2954}
2955
1044static void 2956static int
1045api_cede (void) 2957slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1046{ 2958{
1047 struct transfer_args ta; 2959 AV *av = (AV *)frame->data;
2960 SV *count_sv = AvARRAY (av)[0];
2961 SV *coro_hv = SvRV (coro_current);
1048 2962
1049 prepare_cede (&ta); 2963 /* if we are about to throw, don't actually acquire the lock, just throw */
1050 TRANSFER (ta); 2964 if (CORO_THROW)
1051} 2965 return 0;
2966 else if (SvIVX (count_sv) > 0)
2967 {
2968 frame->destroy = 0;
1052 2969
2970 if (acquire)
2971 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2972 else
2973 coro_semaphore_adjust (aTHX_ av, 0);
2974
2975 return 0;
2976 }
2977 else
2978 {
2979 int i;
2980 /* if we were woken up but can't down, we look through the whole */
2981 /* waiters list and only add us if we aren't in there already */
2982 /* this avoids some degenerate memory usage cases */
2983 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2984 if (AvARRAY (av)[i] == coro_hv)
2985 return 1;
2986
2987 av_push (av, SvREFCNT_inc (coro_hv));
2988 return 1;
2989 }
2990}
2991
2992static int
2993slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2994{
2995 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2996}
2997
2998static int
2999slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3000{
3001 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3002}
3003
3004static void
3005slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3006{
3007 AV *av = (AV *)SvRV (arg [0]);
3008
3009 if (SvIVX (AvARRAY (av)[0]) > 0)
3010 {
3011 frame->data = (void *)av;
3012 frame->prepare = prepare_nop;
3013 }
3014 else
3015 {
3016 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3017
3018 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3019 frame->prepare = prepare_schedule;
3020 /* to avoid race conditions when a woken-up coro gets terminated */
3021 /* we arrange for a temporary on_destroy that calls adjust (0) */
3022 frame->destroy = coro_semaphore_destroy;
3023 }
3024}
3025
3026static void
3027slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3028{
3029 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3030 frame->check = slf_check_semaphore_down;
3031}
3032
3033static void
3034slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3035{
3036 if (items >= 2)
3037 {
3038 /* callback form */
3039 AV *av = (AV *)SvRV (arg [0]);
3040 SV *cb_cv = s_get_cv_croak (arg [1]);
3041
3042 av_push (av, SvREFCNT_inc_NN (cb_cv));
3043
3044 if (SvIVX (AvARRAY (av)[0]) > 0)
3045 coro_semaphore_adjust (aTHX_ av, 0);
3046
3047 frame->prepare = prepare_nop;
3048 frame->check = slf_check_nop;
3049 }
3050 else
3051 {
3052 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3053 frame->check = slf_check_semaphore_wait;
3054 }
3055}
3056
3057/* signal */
3058
3059static void
3060coro_signal_wake (pTHX_ AV *av, int count)
3061{
3062 SvIVX (AvARRAY (av)[0]) = 0;
3063
3064 /* now signal count waiters */
3065 while (count > 0 && AvFILLp (av) > 0)
3066 {
3067 SV *cb;
3068
3069 /* swap first two elements so we can shift a waiter */
3070 cb = AvARRAY (av)[0];
3071 AvARRAY (av)[0] = AvARRAY (av)[1];
3072 AvARRAY (av)[1] = cb;
3073
3074 cb = av_shift (av);
3075
3076 if (SvTYPE (cb) == SVt_PVCV)
3077 {
3078 dSP;
3079 PUSHMARK (SP);
3080 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3081 PUTBACK;
3082 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3083 }
3084 else
3085 {
3086 api_ready (aTHX_ cb);
3087 sv_setiv (cb, 0); /* signal waiter */
3088 }
3089
3090 SvREFCNT_dec (cb);
3091
3092 --count;
3093 }
3094}
3095
3096static int
3097slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3098{
3099 /* if we are about to throw, also stop waiting */
3100 return SvROK ((SV *)frame->data) && !CORO_THROW;
3101}
3102
3103static void
3104slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3105{
3106 AV *av = (AV *)SvRV (arg [0]);
3107
3108 if (items >= 2)
3109 {
3110 SV *cb_cv = s_get_cv_croak (arg [1]);
3111 av_push (av, SvREFCNT_inc_NN (cb_cv));
3112
3113 if (SvIVX (AvARRAY (av)[0]))
3114 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3115
3116 frame->prepare = prepare_nop;
3117 frame->check = slf_check_nop;
3118 }
3119 else if (SvIVX (AvARRAY (av)[0]))
3120 {
3121 SvIVX (AvARRAY (av)[0]) = 0;
3122 frame->prepare = prepare_nop;
3123 frame->check = slf_check_nop;
3124 }
3125 else
3126 {
3127 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3128
3129 av_push (av, waiter);
3130
3131 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3132 frame->prepare = prepare_schedule;
3133 frame->check = slf_check_signal_wait;
3134 }
3135}
3136
3137/*****************************************************************************/
3138/* Coro::AIO */
3139
3140#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3141
3142/* helper storage struct */
3143struct io_state
3144{
3145 int errorno;
3146 I32 laststype; /* U16 in 5.10.0 */
3147 int laststatval;
3148 Stat_t statcache;
3149};
3150
3151static void
3152coro_aio_callback (pTHX_ CV *cv)
3153{
3154 dXSARGS;
3155 AV *state = (AV *)S_GENSUB_ARG;
3156 SV *coro = av_pop (state);
3157 SV *data_sv = newSV (sizeof (struct io_state));
3158
3159 av_extend (state, items - 1);
3160
3161 sv_upgrade (data_sv, SVt_PV);
3162 SvCUR_set (data_sv, sizeof (struct io_state));
3163 SvPOK_only (data_sv);
3164
3165 {
3166 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3167
3168 data->errorno = errno;
3169 data->laststype = PL_laststype;
3170 data->laststatval = PL_laststatval;
3171 data->statcache = PL_statcache;
3172 }
3173
3174 /* now build the result vector out of all the parameters and the data_sv */
3175 {
3176 int i;
3177
3178 for (i = 0; i < items; ++i)
3179 av_push (state, SvREFCNT_inc_NN (ST (i)));
3180 }
3181
3182 av_push (state, data_sv);
3183
3184 api_ready (aTHX_ coro);
3185 SvREFCNT_dec (coro);
3186 SvREFCNT_dec ((AV *)state);
3187}
3188
3189static int
3190slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3191{
3192 AV *state = (AV *)frame->data;
3193
3194 /* if we are about to throw, return early */
3195 /* this does not cancel the aio request, but at least */
3196 /* it quickly returns */
3197 if (CORO_THROW)
3198 return 0;
3199
3200 /* one element that is an RV? repeat! */
3201 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3202 return 1;
3203
3204 /* restore status */
3205 {
3206 SV *data_sv = av_pop (state);
3207 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3208
3209 errno = data->errorno;
3210 PL_laststype = data->laststype;
3211 PL_laststatval = data->laststatval;
3212 PL_statcache = data->statcache;
3213
3214 SvREFCNT_dec (data_sv);
3215 }
3216
3217 /* push result values */
3218 {
3219 dSP;
3220 int i;
3221
3222 EXTEND (SP, AvFILLp (state) + 1);
3223 for (i = 0; i <= AvFILLp (state); ++i)
3224 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3225
3226 PUTBACK;
3227 }
3228
3229 return 0;
3230}
3231
3232static void
3233slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3234{
3235 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3236 SV *coro_hv = SvRV (coro_current);
3237 struct coro *coro = SvSTATE_hv (coro_hv);
3238
3239 /* put our coroutine id on the state arg */
3240 av_push (state, SvREFCNT_inc_NN (coro_hv));
3241
3242 /* first see whether we have a non-zero priority and set it as AIO prio */
3243 if (coro->prio)
3244 {
3245 dSP;
3246
3247 static SV *prio_cv;
3248 static SV *prio_sv;
3249
3250 if (ecb_expect_false (!prio_cv))
3251 {
3252 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3253 prio_sv = newSViv (0);
3254 }
3255
3256 PUSHMARK (SP);
3257 sv_setiv (prio_sv, coro->prio);
3258 XPUSHs (prio_sv);
3259
3260 PUTBACK;
3261 call_sv (prio_cv, G_VOID | G_DISCARD);
3262 }
3263
3264 /* now call the original request */
3265 {
3266 dSP;
3267 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3268 int i;
3269
3270 PUSHMARK (SP);
3271
3272 /* first push all args to the stack */
3273 EXTEND (SP, items + 1);
3274
3275 for (i = 0; i < items; ++i)
3276 PUSHs (arg [i]);
3277
3278 /* now push the callback closure */
3279 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3280
3281 /* now call the AIO function - we assume our request is uncancelable */
3282 PUTBACK;
3283 call_sv ((SV *)req, G_VOID | G_DISCARD);
3284 }
3285
3286 /* now that the request is going, we loop till we have a result */
3287 frame->data = (void *)state;
3288 frame->prepare = prepare_schedule;
3289 frame->check = slf_check_aio_req;
3290}
3291
3292static void
3293coro_aio_req_xs (pTHX_ CV *cv)
3294{
3295 dXSARGS;
3296
3297 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3298
3299 XSRETURN_EMPTY;
3300}
3301
3302/*****************************************************************************/
3303
3304#if CORO_CLONE
3305# include "clone.c"
3306#endif
3307
3308/*****************************************************************************/
3309
3310static SV *
3311coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3312{
3313 SV *coro_sv;
3314 struct coro *coro;
3315 MAGIC *mg;
3316 HV *hv;
3317 SV *cb;
3318 int i;
3319
3320 if (argc > 0)
3321 {
3322 cb = s_get_cv_croak (argv [0]);
3323
3324 if (!is_coro)
3325 {
3326 if (CvISXSUB (cb))
3327 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3328
3329 if (!CvROOT (cb))
3330 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3331 }
3332 }
3333
3334 Newz (0, coro, 1, struct coro);
3335 coro->args = newAV ();
3336 coro->flags = CF_NEW;
3337
3338 if (coro_first) coro_first->prev = coro;
3339 coro->next = coro_first;
3340 coro_first = coro;
3341
3342 coro->hv = hv = newHV ();
3343 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3344 mg->mg_flags |= MGf_DUP;
3345 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3346
3347 if (argc > 0)
3348 {
3349 av_extend (coro->args, argc + is_coro - 1);
3350
3351 if (is_coro)
3352 {
3353 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3354 cb = (SV *)cv_coro_run;
3355 }
3356
3357 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3358
3359 for (i = 1; i < argc; i++)
3360 av_push (coro->args, newSVsv (argv [i]));
3361 }
3362
3363 return coro_sv;
3364}
3365
3366#ifndef __cplusplus
3367ecb_cold XS(boot_Coro__State);
3368#endif
3369
3370#if CORO_JIT
3371
3372static void ecb_noinline ecb_cold
3373pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3374{
3375 dSP;
3376 AV *av = newAV ();
3377
3378 av_store (av, 3, newSVuv (d));
3379 av_store (av, 2, newSVuv (c));
3380 av_store (av, 1, newSVuv (b));
3381 av_store (av, 0, newSVuv (a));
3382
3383 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3384
3385 PUTBACK;
3386}
3387
3388static void ecb_noinline ecb_cold
3389jit_init (pTHX)
3390{
3391 dSP;
3392 SV *load, *save;
3393 char *map_base;
3394 char *load_ptr, *save_ptr;
3395 STRLEN load_len, save_len, map_len;
3396 int count;
3397
3398 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3399
3400 PUSHMARK (SP);
3401 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3402 #include "state.h"
3403 count = call_pv ("Coro::State::_jit", G_ARRAY);
3404 SPAGAIN;
3405
3406 save = POPs; save_ptr = SvPVbyte (save, save_len);
3407 load = POPs; load_ptr = SvPVbyte (load, load_len);
3408
3409 map_len = load_len + save_len + 16;
3410
3411 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3412
3413 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3414
3415 load_perl_slots = (load_save_perl_slots_type)map_base;
3416 memcpy (map_base, load_ptr, load_len);
3417
3418 map_base += (load_len + 15) & ~15;
3419
3420 save_perl_slots = (load_save_perl_slots_type)map_base;
3421 memcpy (map_base, save_ptr, save_len);
3422
3423 /* we are good citizens and try to make the page read-only, so the evil evil */
3424 /* hackers might have it a bit more difficult */
3425 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3426
3427 PUTBACK;
3428 eval_pv ("undef &Coro::State::_jit", 1);
3429}
3430
3431#endif
3432
1053MODULE = Coro::State PACKAGE = Coro::State 3433MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1054 3434
1055PROTOTYPES: DISABLE 3435PROTOTYPES: DISABLE
1056 3436
1057BOOT: 3437BOOT:
1058{ 3438{
1059#ifdef USE_ITHREADS 3439#ifdef USE_ITHREADS
1060 MUTEX_INIT (&coro_mutex); 3440# if CORO_PTHREAD
3441 coro_thx = PERL_GET_CONTEXT;
1061#endif 3442# endif
1062 BOOT_PAGESIZE; 3443#endif
3444 /* perl defines these to check for existance first, but why it doesn't */
3445 /* just create them one at init time is not clear to me, except for */
3446 /* programs trying to delete them, but... */
3447 /* anyway, we declare this as invalid and make sure they are initialised here */
3448 DEFSV;
3449 ERRSV;
3450
3451 cctx_current = cctx_new_empty ();
3452
3453 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3454 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3455
3456 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3457 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3458 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3459
3460 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3461 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3462 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1063 3463
1064 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3464 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1065 3465
3466 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3467 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1066 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3468 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1067 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1068 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1069 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1070 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3469 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1071 3470
1072 main_mainstack = PL_mainstack; 3471 main_mainstack = PL_mainstack;
3472 main_top_env = PL_top_env;
1073 3473
3474 while (main_top_env->je_prev)
3475 main_top_env = main_top_env->je_prev;
3476
3477 {
3478 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3479
3480 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3481 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3482
3483 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3484 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3485 }
3486
1074 coroapi.ver = CORO_API_VERSION; 3487 coroapi.ver = CORO_API_VERSION;
3488 coroapi.rev = CORO_API_REVISION;
3489
1075 coroapi.transfer = api_transfer; 3490 coroapi.transfer = api_transfer;
1076 3491
3492 coroapi.sv_state = SvSTATE_;
3493 coroapi.execute_slf = api_execute_slf;
3494 coroapi.prepare_nop = prepare_nop;
3495 coroapi.prepare_schedule = prepare_schedule;
3496 coroapi.prepare_cede = prepare_cede;
3497 coroapi.prepare_cede_notself = prepare_cede_notself;
3498
3499 time_init (aTHX);
3500
1077 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3501 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3502#if CORO_JIT
3503 PUTBACK;
3504 jit_init (aTHX);
3505 SPAGAIN;
3506#endif
1078} 3507}
1079 3508
1080SV * 3509SV *
1081new (char *klass, ...) 3510new (SV *klass, ...)
3511 ALIAS:
3512 Coro::new = 1
1082 CODE: 3513 CODE:
1083{ 3514 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1084 struct coro *coro;
1085 HV *hv;
1086 int i;
1087
1088 Newz (0, coro, 1, struct coro);
1089 coro->args = newAV ();
1090 coro->save = CORO_SAVE_ALL;
1091 coro->flags = CF_NEW;
1092
1093 hv = newHV ();
1094 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1095 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1096
1097 for (i = 1; i < items; i++)
1098 av_push (coro->args, newSVsv (ST (i)));
1099}
1100 OUTPUT:
1101 RETVAL
1102
1103int
1104save (SV *coro, int new_save = -1)
1105 CODE:
1106 RETVAL = api_save (coro, new_save);
1107 OUTPUT: 3515 OUTPUT:
1108 RETVAL 3516 RETVAL
1109 3517
1110void 3518void
1111_set_stacklevel (...) 3519transfer (...)
1112 ALIAS: 3520 PROTOTYPE: $$
1113 Coro::State::transfer = 1 3521 CODE:
1114 Coro::schedule = 2 3522 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1115 Coro::cede = 3
1116 CODE:
1117{
1118 struct transfer_args ta;
1119 3523
1120 switch (ix) 3524SV *
3525clone (Coro::State coro)
3526 CODE:
3527{
3528#if CORO_CLONE
3529 struct coro *ncoro = coro_clone (aTHX_ coro);
3530 MAGIC *mg;
3531 /* TODO: too much duplication */
3532 ncoro->hv = newHV ();
3533 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3534 mg->mg_flags |= MGf_DUP;
3535 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3536#else
3537 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3538#endif
3539}
3540 OUTPUT:
3541 RETVAL
3542
3543int
3544cctx_stacksize (int new_stacksize = 0)
3545 PROTOTYPE: ;$
3546 CODE:
3547 RETVAL = cctx_stacksize;
3548 if (new_stacksize)
1121 { 3549 {
1122 case 0: 3550 cctx_stacksize = new_stacksize;
1123 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3551 ++cctx_gen;
1124 ta.next = 0;
1125 break;
1126
1127 case 1:
1128 if (items != 2)
1129 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1130
1131 prepare_transfer (&ta, ST (0), ST (1));
1132 break;
1133
1134 case 2:
1135 prepare_schedule (&ta);
1136 break;
1137
1138 case 3:
1139 prepare_cede (&ta);
1140 break;
1141 } 3552 }
3553 OUTPUT:
3554 RETVAL
1142 3555
1143 TRANSFER (ta); 3556int
1144} 3557cctx_max_idle (int max_idle = 0)
1145 3558 PROTOTYPE: ;$
1146void
1147_clone_state_from (SV *dst, SV *src)
1148 CODE: 3559 CODE:
1149{ 3560 RETVAL = cctx_max_idle;
1150 struct coro *coro_src = SvSTATE (src); 3561 if (max_idle > 1)
1151 3562 cctx_max_idle = max_idle;
1152 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3563 OUTPUT:
1153 3564 RETVAL
1154 ++coro_src->refcnt;
1155 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1156}
1157
1158void
1159_exit (code)
1160 int code
1161 PROTOTYPE: $
1162 CODE:
1163 _exit (code);
1164 3565
1165int 3566int
1166cctx_count () 3567cctx_count ()
3568 PROTOTYPE:
1167 CODE: 3569 CODE:
1168 RETVAL = cctx_count; 3570 RETVAL = cctx_count;
1169 OUTPUT: 3571 OUTPUT:
1170 RETVAL 3572 RETVAL
1171 3573
1172int 3574int
1173cctx_idle () 3575cctx_idle ()
3576 PROTOTYPE:
1174 CODE: 3577 CODE:
1175 RETVAL = cctx_idle; 3578 RETVAL = cctx_idle;
1176 OUTPUT: 3579 OUTPUT:
1177 RETVAL 3580 RETVAL
1178 3581
3582void
3583list ()
3584 PROTOTYPE:
3585 PPCODE:
3586{
3587 struct coro *coro;
3588 for (coro = coro_first; coro; coro = coro->next)
3589 if (coro->hv)
3590 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3591}
3592
3593void
3594call (Coro::State coro, SV *coderef)
3595 ALIAS:
3596 eval = 1
3597 CODE:
3598{
3599 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3600 {
3601 struct coro *current = SvSTATE_current;
3602 struct CoroSLF slf_save;
3603
3604 if (current != coro)
3605 {
3606 PUTBACK;
3607 save_perl (aTHX_ current);
3608 load_perl (aTHX_ coro);
3609 /* the coro is most likely in an active SLF call.
3610 * while not strictly required (the code we execute is
3611 * not allowed to call any SLF functions), it's cleaner
3612 * to reinitialise the slf_frame and restore it later.
3613 * This might one day allow us to actually do SLF calls
3614 * from code executed here.
3615 */
3616 slf_save = slf_frame;
3617 slf_frame.prepare = 0;
3618 SPAGAIN;
3619 }
3620
3621 PUSHSTACK;
3622
3623 PUSHMARK (SP);
3624 PUTBACK;
3625
3626 if (ix)
3627 eval_sv (coderef, 0);
3628 else
3629 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3630
3631 POPSTACK;
3632 SPAGAIN;
3633
3634 if (current != coro)
3635 {
3636 PUTBACK;
3637 slf_frame = slf_save;
3638 save_perl (aTHX_ coro);
3639 load_perl (aTHX_ current);
3640 SPAGAIN;
3641 }
3642 }
3643}
3644
3645SV *
3646is_ready (Coro::State coro)
3647 PROTOTYPE: $
3648 ALIAS:
3649 is_ready = CF_READY
3650 is_running = CF_RUNNING
3651 is_new = CF_NEW
3652 is_destroyed = CF_ZOMBIE
3653 is_zombie = CF_ZOMBIE
3654 is_suspended = CF_SUSPENDED
3655 CODE:
3656 RETVAL = boolSV (coro->flags & ix);
3657 OUTPUT:
3658 RETVAL
3659
3660void
3661throw (SV *self, SV *exception = &PL_sv_undef)
3662 PROTOTYPE: $;$
3663 CODE:
3664{
3665 struct coro *coro = SvSTATE (self);
3666 struct coro *current = SvSTATE_current;
3667 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3668 SvREFCNT_dec (*exceptionp);
3669 SvGETMAGIC (exception);
3670 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3671
3672 api_ready (aTHX_ self);
3673}
3674
3675void
3676api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3677 PROTOTYPE: $;$
3678 C_ARGS: aTHX_ coro, flags
3679
3680SV *
3681has_cctx (Coro::State coro)
3682 PROTOTYPE: $
3683 CODE:
3684 /* maybe manage the running flag differently */
3685 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3686 OUTPUT:
3687 RETVAL
3688
3689int
3690is_traced (Coro::State coro)
3691 PROTOTYPE: $
3692 CODE:
3693 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3694 OUTPUT:
3695 RETVAL
3696
3697UV
3698rss (Coro::State coro)
3699 PROTOTYPE: $
3700 ALIAS:
3701 usecount = 1
3702 CODE:
3703 switch (ix)
3704 {
3705 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3706 case 1: RETVAL = coro->usecount; break;
3707 }
3708 OUTPUT:
3709 RETVAL
3710
3711void
3712force_cctx ()
3713 PROTOTYPE:
3714 CODE:
3715 cctx_current->idle_sp = 0;
3716
3717void
3718swap_defsv (Coro::State self)
3719 PROTOTYPE: $
3720 ALIAS:
3721 swap_defav = 1
3722 CODE:
3723 if (!self->slot)
3724 croak ("cannot swap state with coroutine that has no saved state,");
3725 else
3726 {
3727 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3728 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3729
3730 SV *tmp = *src; *src = *dst; *dst = tmp;
3731 }
3732
3733void
3734cancel (Coro::State self)
3735 CODE:
3736 coro_state_destroy (aTHX_ self);
3737
3738SV *
3739enable_times (int enabled = enable_times)
3740 CODE:
3741{
3742 RETVAL = boolSV (enable_times);
3743
3744 if (enabled != enable_times)
3745 {
3746 enable_times = enabled;
3747
3748 coro_times_update ();
3749 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3750 }
3751}
3752 OUTPUT:
3753 RETVAL
3754
3755void
3756times (Coro::State self)
3757 PPCODE:
3758{
3759 struct coro *current = SvSTATE (coro_current);
3760
3761 if (ecb_expect_false (current == self))
3762 {
3763 coro_times_update ();
3764 coro_times_add (SvSTATE (coro_current));
3765 }
3766
3767 EXTEND (SP, 2);
3768 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3769 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3770
3771 if (ecb_expect_false (current == self))
3772 coro_times_sub (SvSTATE (coro_current));
3773}
3774
3775void
3776swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3777 CODE:
3778{
3779 struct coro *current = SvSTATE_current;
3780
3781 if (current == coro)
3782 SWAP_SVS (current);
3783
3784 if (!coro->swap_sv)
3785 coro->swap_sv = newAV ();
3786
3787 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3788 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3789
3790 if (current == coro)
3791 SWAP_SVS (current);
3792}
3793
3794
1179MODULE = Coro::State PACKAGE = Coro 3795MODULE = Coro::State PACKAGE = Coro
1180 3796
1181BOOT: 3797BOOT:
1182{ 3798{
1183 int i; 3799 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3800 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3801 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3802 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3803 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3804 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3805 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3806 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1184 3807
3808 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3809 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3810 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3811 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3812
1185 coro_stash = gv_stashpv ("Coro", TRUE); 3813 coro_stash = gv_stashpv ("Coro", TRUE);
1186 3814
1187 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3815 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1188 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3816 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1189 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3817 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1190 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3818 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1191 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3819 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1192 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3820 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1193
1194 coro_current = get_sv ("Coro::current", FALSE);
1195 SvREADONLY_on (coro_current);
1196
1197 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1198 coro_ready[i] = newAV ();
1199 3821
1200 { 3822 {
1201 SV *sv = perl_get_sv("Coro::API", 1); 3823 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1202 3824
1203 coroapi.schedule = api_schedule; 3825 coroapi.schedule = api_schedule;
1204 coroapi.save = api_save; 3826 coroapi.schedule_to = api_schedule_to;
1205 coroapi.cede = api_cede; 3827 coroapi.cede = api_cede;
3828 coroapi.cede_notself = api_cede_notself;
1206 coroapi.ready = api_ready; 3829 coroapi.ready = api_ready;
1207 coroapi.is_ready = api_is_ready; 3830 coroapi.is_ready = api_is_ready;
1208 coroapi.nready = &coro_nready; 3831 coroapi.nready = coro_nready;
1209 coroapi.current = coro_current; 3832 coroapi.current = coro_current;
1210 3833
1211 GCoroAPI = &coroapi; 3834 /*GCoroAPI = &coroapi;*/
1212 sv_setiv (sv, (IV)&coroapi); 3835 sv_setiv (sv, (IV)&coroapi);
1213 SvREADONLY_on (sv); 3836 SvREADONLY_on (sv);
1214 } 3837 }
1215} 3838}
3839
3840SV *
3841async (...)
3842 PROTOTYPE: &@
3843 CODE:
3844 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3845 api_ready (aTHX_ RETVAL);
3846 OUTPUT:
3847 RETVAL
3848
3849void
3850_destroy (Coro::State coro)
3851 CODE:
3852 /* used by the manager thread */
3853 coro_state_destroy (aTHX_ coro);
3854
3855void
3856on_destroy (Coro::State coro, SV *cb)
3857 CODE:
3858 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3859
3860void
3861join (...)
3862 CODE:
3863 CORO_EXECUTE_SLF_XS (slf_init_join);
3864
3865void
3866terminate (...)
3867 CODE:
3868 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3869
3870void
3871cancel (...)
3872 CODE:
3873 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3874
3875int
3876safe_cancel (Coro::State self, ...)
3877 C_ARGS: aTHX_ self, &ST (1), items - 1
3878
3879void
3880schedule (...)
3881 CODE:
3882 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3883
3884void
3885schedule_to (...)
3886 CODE:
3887 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3888
3889void
3890cede_to (...)
3891 CODE:
3892 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3893
3894void
3895cede (...)
3896 CODE:
3897 CORO_EXECUTE_SLF_XS (slf_init_cede);
3898
3899void
3900cede_notself (...)
3901 CODE:
3902 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1216 3903
1217void 3904void
1218_set_current (SV *current) 3905_set_current (SV *current)
1219 PROTOTYPE: $ 3906 PROTOTYPE: $
1220 CODE: 3907 CODE:
1221 SvREFCNT_dec (SvRV (coro_current)); 3908 SvREFCNT_dec (SvRV (coro_current));
1222 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3909 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3910
3911void
3912_set_readyhook (SV *hook)
3913 PROTOTYPE: $
3914 CODE:
3915 SvREFCNT_dec (coro_readyhook);
3916 SvGETMAGIC (hook);
3917 if (SvOK (hook))
3918 {
3919 coro_readyhook = newSVsv (hook);
3920 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3921 }
3922 else
3923 {
3924 coro_readyhook = 0;
3925 CORO_READYHOOK = 0;
3926 }
1223 3927
1224int 3928int
1225prio (Coro::State coro, int newprio = 0) 3929prio (Coro::State coro, int newprio = 0)
3930 PROTOTYPE: $;$
1226 ALIAS: 3931 ALIAS:
1227 nice = 1 3932 nice = 1
1228 CODE: 3933 CODE:
1229{ 3934{
1230 RETVAL = coro->prio; 3935 RETVAL = coro->prio;
1231 3936
1232 if (items > 1) 3937 if (items > 1)
1233 { 3938 {
1234 if (ix) 3939 if (ix)
1235 newprio += coro->prio; 3940 newprio = coro->prio - newprio;
1236 3941
1237 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3942 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1238 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3943 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1239 3944
1240 coro->prio = newprio; 3945 coro->prio = newprio;
1241 } 3946 }
1242} 3947}
3948 OUTPUT:
3949 RETVAL
1243 3950
1244SV * 3951SV *
1245ready (SV *self) 3952ready (SV *self)
1246 PROTOTYPE: $ 3953 PROTOTYPE: $
1247 CODE: 3954 CODE:
1248 RETVAL = boolSV (api_ready (self)); 3955 RETVAL = boolSV (api_ready (aTHX_ self));
1249 OUTPUT:
1250 RETVAL
1251
1252SV *
1253is_ready (SV *self)
1254 PROTOTYPE: $
1255 CODE:
1256 RETVAL = boolSV (api_is_ready (self));
1257 OUTPUT: 3956 OUTPUT:
1258 RETVAL 3957 RETVAL
1259 3958
1260int 3959int
1261nready (...) 3960nready (...)
… …
1263 CODE: 3962 CODE:
1264 RETVAL = coro_nready; 3963 RETVAL = coro_nready;
1265 OUTPUT: 3964 OUTPUT:
1266 RETVAL 3965 RETVAL
1267 3966
1268MODULE = Coro::State PACKAGE = Coro::AIO 3967void
3968suspend (Coro::State self)
3969 PROTOTYPE: $
3970 CODE:
3971 self->flags |= CF_SUSPENDED;
3972
3973void
3974resume (Coro::State self)
3975 PROTOTYPE: $
3976 CODE:
3977 self->flags &= ~CF_SUSPENDED;
3978
3979void
3980_pool_handler (...)
3981 CODE:
3982 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3983
3984void
3985async_pool (SV *cv, ...)
3986 PROTOTYPE: &@
3987 PPCODE:
3988{
3989 HV *hv = (HV *)av_pop (av_async_pool);
3990 AV *av = newAV ();
3991 SV *cb = ST (0);
3992 int i;
3993
3994 av_extend (av, items - 2);
3995 for (i = 1; i < items; ++i)
3996 av_push (av, SvREFCNT_inc_NN (ST (i)));
3997
3998 if ((SV *)hv == &PL_sv_undef)
3999 {
4000 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4001 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4002 SvREFCNT_dec (sv);
4003 }
4004
4005 {
4006 struct coro *coro = SvSTATE_hv (hv);
4007
4008 assert (!coro->invoke_cb);
4009 assert (!coro->invoke_av);
4010 coro->invoke_cb = SvREFCNT_inc (cb);
4011 coro->invoke_av = av;
4012 }
4013
4014 api_ready (aTHX_ (SV *)hv);
4015
4016 if (GIMME_V != G_VOID)
4017 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4018 else
4019 SvREFCNT_dec (hv);
4020}
1269 4021
1270SV * 4022SV *
1271_get_state () 4023rouse_cb ()
4024 PROTOTYPE:
1272 CODE: 4025 CODE:
1273{ 4026 RETVAL = coro_new_rouse_cb (aTHX);
1274 struct io_state *data;
1275
1276 RETVAL = newSV (sizeof (struct io_state));
1277 data = (struct io_state *)SvPVX (RETVAL);
1278 SvCUR_set (RETVAL, sizeof (struct io_state));
1279 SvPOK_only (RETVAL);
1280
1281 data->errorno = errno;
1282 data->laststype = PL_laststype;
1283 data->laststatval = PL_laststatval;
1284 data->statcache = PL_statcache;
1285}
1286 OUTPUT: 4027 OUTPUT:
1287 RETVAL 4028 RETVAL
1288 4029
1289void 4030void
1290_set_state (char *data_) 4031rouse_wait (...)
4032 PROTOTYPE: ;$
4033 PPCODE:
4034 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4035
4036void
4037on_enter (SV *block)
4038 ALIAS:
4039 on_leave = 1
1291 PROTOTYPE: $ 4040 PROTOTYPE: &
1292 CODE: 4041 CODE:
1293{ 4042{
1294 struct io_state *data = (void *)data_; 4043 struct coro *coro = SvSTATE_current;
4044 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1295 4045
1296 errno = data->errorno; 4046 block = s_get_cv_croak (block);
1297 PL_laststype = data->laststype;
1298 PL_laststatval = data->laststatval;
1299 PL_statcache = data->statcache;
1300}
1301 4047
4048 if (!*avp)
4049 *avp = newAV ();
4050
4051 av_push (*avp, SvREFCNT_inc (block));
4052
4053 if (!ix)
4054 on_enterleave_call (aTHX_ block);
4055
4056 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4057 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4058 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4059}
4060
4061
4062MODULE = Coro::State PACKAGE = PerlIO::cede
4063
4064BOOT:
4065 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4066
4067
4068MODULE = Coro::State PACKAGE = Coro::Semaphore
4069
4070SV *
4071new (SV *klass, SV *count = 0)
4072 CODE:
4073{
4074 int semcnt = 1;
4075
4076 if (count)
4077 {
4078 SvGETMAGIC (count);
4079
4080 if (SvOK (count))
4081 semcnt = SvIV (count);
4082 }
4083
4084 RETVAL = sv_bless (
4085 coro_waitarray_new (aTHX_ semcnt),
4086 GvSTASH (CvGV (cv))
4087 );
4088}
4089 OUTPUT:
4090 RETVAL
4091
4092# helper for Coro::Channel and others
4093SV *
4094_alloc (int count)
4095 CODE:
4096 RETVAL = coro_waitarray_new (aTHX_ count);
4097 OUTPUT:
4098 RETVAL
4099
4100SV *
4101count (SV *self)
4102 CODE:
4103 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4104 OUTPUT:
4105 RETVAL
4106
4107void
4108up (SV *self, int adjust = 1)
4109 ALIAS:
4110 adjust = 1
4111 CODE:
4112 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4113
4114void
4115down (...)
4116 CODE:
4117 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4118
4119void
4120wait (...)
4121 CODE:
4122 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4123
4124void
4125try (SV *self)
4126 PPCODE:
4127{
4128 AV *av = (AV *)SvRV (self);
4129 SV *count_sv = AvARRAY (av)[0];
4130 IV count = SvIVX (count_sv);
4131
4132 if (count > 0)
4133 {
4134 --count;
4135 SvIVX (count_sv) = count;
4136 XSRETURN_YES;
4137 }
4138 else
4139 XSRETURN_NO;
4140}
4141
4142void
4143waiters (SV *self)
4144 PPCODE:
4145{
4146 AV *av = (AV *)SvRV (self);
4147 int wcount = AvFILLp (av) + 1 - 1;
4148
4149 if (GIMME_V == G_SCALAR)
4150 XPUSHs (sv_2mortal (newSViv (wcount)));
4151 else
4152 {
4153 int i;
4154 EXTEND (SP, wcount);
4155 for (i = 1; i <= wcount; ++i)
4156 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4157 }
4158}
4159
4160MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4161
4162void
4163_may_delete (SV *sem, int count, unsigned int extra_refs)
4164 PPCODE:
4165{
4166 AV *av = (AV *)SvRV (sem);
4167
4168 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4169 && AvFILLp (av) == 0 /* no waiters, just count */
4170 && SvIV (AvARRAY (av)[0]) == count)
4171 XSRETURN_YES;
4172
4173 XSRETURN_NO;
4174}
4175
4176MODULE = Coro::State PACKAGE = Coro::Signal
4177
4178SV *
4179new (SV *klass)
4180 CODE:
4181 RETVAL = sv_bless (
4182 coro_waitarray_new (aTHX_ 0),
4183 GvSTASH (CvGV (cv))
4184 );
4185 OUTPUT:
4186 RETVAL
4187
4188void
4189wait (...)
4190 CODE:
4191 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4192
4193void
4194broadcast (SV *self)
4195 CODE:
4196{
4197 AV *av = (AV *)SvRV (self);
4198 coro_signal_wake (aTHX_ av, AvFILLp (av));
4199}
4200
4201void
4202send (SV *self)
4203 CODE:
4204{
4205 AV *av = (AV *)SvRV (self);
4206
4207 if (AvFILLp (av))
4208 coro_signal_wake (aTHX_ av, 1);
4209 else
4210 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4211}
4212
4213IV
4214awaited (SV *self)
4215 CODE:
4216 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4217 OUTPUT:
4218 RETVAL
4219
4220
4221MODULE = Coro::State PACKAGE = Coro::AnyEvent
4222
4223BOOT:
4224 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4225
4226void
4227_schedule (...)
4228 CODE:
4229{
4230 static int incede;
4231
4232 api_cede_notself (aTHX);
4233
4234 ++incede;
4235 while (coro_nready >= incede && api_cede (aTHX))
4236 ;
4237
4238 sv_setsv (sv_activity, &PL_sv_undef);
4239 if (coro_nready >= incede)
4240 {
4241 PUSHMARK (SP);
4242 PUTBACK;
4243 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4244 }
4245
4246 --incede;
4247}
4248
4249
4250MODULE = Coro::State PACKAGE = Coro::AIO
4251
4252void
4253_register (char *target, char *proto, SV *req)
4254 CODE:
4255{
4256 SV *req_cv = s_get_cv_croak (req);
4257 /* newXSproto doesn't return the CV on 5.8 */
4258 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4259 sv_setpv ((SV *)slf_cv, proto);
4260 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4261}
4262
4263MODULE = Coro::State PACKAGE = Coro::Select
4264
4265void
4266patch_pp_sselect ()
4267 CODE:
4268 if (!coro_old_pp_sselect)
4269 {
4270 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4271 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4272 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4273 }
4274
4275void
4276unpatch_pp_sselect ()
4277 CODE:
4278 if (coro_old_pp_sselect)
4279 {
4280 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4281 coro_old_pp_sselect = 0;
4282 }
4283
4284MODULE = Coro::State PACKAGE = Coro::Util
4285
4286void
4287_exit (int code)
4288 CODE:
4289 _exit (code);
4290
4291NV
4292time ()
4293 CODE:
4294 RETVAL = nvtime (aTHX);
4295 OUTPUT:
4296 RETVAL
4297
4298NV
4299gettimeofday ()
4300 PPCODE:
4301{
4302 UV tv [2];
4303 u2time (aTHX_ tv);
4304 EXTEND (SP, 2);
4305 PUSHs (sv_2mortal (newSVuv (tv [0])));
4306 PUSHs (sv_2mortal (newSVuv (tv [1])));
4307}
4308

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