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Comparing Coro/Coro/State.xs (file contents):
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs.
Revision 1.437 by root, Tue Nov 5 15:13:42 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
163#define VAR(name,type) type name;
164# include "state.h"
165#undef VAR
166 232
167 /* coro process data */ 233 /* coro process data */
168 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;
169}; 257};
170 258
171typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
172typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
173 261
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... */
174static 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 *
175coro_clone_padlist (CV *cv) 517coro_derive_padlist (pTHX_ CV *cv)
176{ 518{
177 AV *padlist = CvPADLIST (cv); 519 PADLIST *padlist = CvPADLIST (cv);
178 AV *newpadlist, *newpad; 520 PADLIST *newpadlist;
521 PAD *newpad;
522 PADOFFSET off = PadlistMAX (padlist) + 1;
179 523
180 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. */
181 AvREAL_off (newpadlist); 552 AvREAL_off (newpadlist);
182#if PERL_VERSION_ATLEAST (5,9,0) 553#endif
183 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 554
555 /* Already extended to 2 elements by newPADLIST. */
556 PadlistMAX (newpadlist) = 1;
557 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
558 PadlistARRAY (newpadlist)[1] = newpad;
559
560 return newpadlist;
561}
562
563ecb_inline void
564free_padlist (pTHX_ PADLIST *padlist)
565{
566 /* may be during global destruction */
567 if (!IN_DESTRUCT)
568 {
569 I32 i = PadlistMAX (padlist);
570
571 while (i > 0) /* special-case index 0 */
572 {
573 /* we try to be extra-careful here */
574 PAD *pad = PadlistARRAY (padlist)[i--];
575 I32 j = PadMAX (pad);
576
577 while (j >= 0)
578 SvREFCNT_dec (PadARRAY (pad)[j--]);
579
580 PadMAX (pad) = -1;
581 SvREFCNT_dec (pad);
582 }
583
584 SvREFCNT_dec (PadlistNAMES (padlist));
585
586#if NEWPADAPI
587 Safefree (PadlistARRAY (padlist));
588 Safefree (padlist);
184#else 589#else
185 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
186#endif
187 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
188 --AvFILLp (padlist);
189
190 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
191 av_store (newpadlist, 1, (SV *)newpad);
192
193 return newpadlist;
194}
195
196static void
197free_padlist (AV *padlist)
198{
199 /* may be during global destruction */
200 if (SvREFCNT (padlist))
201 {
202 I32 i = AvFILLp (padlist); 590 AvFILLp (padlist) = -1;
203 while (i >= 0) 591 AvREAL_off (padlist);
204 {
205 SV **svp = av_fetch (padlist, i--, FALSE);
206 if (svp)
207 {
208 SV *sv;
209 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
210 SvREFCNT_dec (sv);
211
212 SvREFCNT_dec (*svp);
213 }
214 }
215
216 SvREFCNT_dec ((SV*)padlist); 592 SvREFCNT_dec ((SV*)padlist);
593#endif
217 } 594 }
218} 595}
219 596
220static int 597static int
221coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 598coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
222{ 599{
223 AV *padlist; 600 PADLIST *padlist;
224 AV *av = (AV *)mg->mg_obj; 601 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
602 size_t len = *(size_t *)mg->mg_ptr;
225 603
226 /* casting is fun. */ 604 /* perl manages to free our internal AV and _then_ call us */
227 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 605 if (IN_DESTRUCT)
606 return 0;
607
608 while (len--)
228 free_padlist (padlist); 609 free_padlist (aTHX_ padlists[len]);
229
230 SvREFCNT_dec (av);
231 610
232 return 0; 611 return 0;
233} 612}
234 613
235#define PERL_MAGIC_coro PERL_MAGIC_ext 614static MGVTBL coro_cv_vtbl = {
236 615 0, 0, 0, 0,
237static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 616 coro_cv_free
238 617};
239#define CORO_MAGIC(cv) \
240 SvMAGIC (cv) \
241 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242 ? SvMAGIC (cv) \
243 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
244 : 0
245 618
246/* the next two functions merely cache the padlists */ 619/* the next two functions merely cache the padlists */
247static void 620ecb_inline void
248get_padlist (CV *cv) 621get_padlist (pTHX_ CV *cv)
249{ 622{
250 MAGIC *mg = CORO_MAGIC (cv); 623 MAGIC *mg = CORO_MAGIC_cv (cv);
251 AV *av; 624 size_t *lenp;
252 625
253 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 626 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
254 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 627 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
255 else 628 else
256 { 629 {
257#if 0 630#if CORO_PREFER_PERL_FUNCTIONS
258 /* this is probably cleaner, but also slower? */ 631 /* this is probably cleaner? but also slower! */
632 /* in practise, it seems to be less stable */
259 CV *cp = Perl_cv_clone (cv); 633 CV *cp = Perl_cv_clone (aTHX_ cv);
260 CvPADLIST (cv) = CvPADLIST (cp); 634 CvPADLIST (cv) = CvPADLIST (cp);
261 CvPADLIST (cp) = 0; 635 CvPADLIST (cp) = 0;
262 SvREFCNT_dec (cp); 636 SvREFCNT_dec (cp);
263#else 637#else
264 CvPADLIST (cv) = coro_clone_padlist (cv); 638 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
265#endif 639#endif
266 } 640 }
267} 641}
268 642
269static void 643ecb_inline void
270put_padlist (CV *cv) 644put_padlist (pTHX_ CV *cv)
271{ 645{
272 MAGIC *mg = CORO_MAGIC (cv); 646 MAGIC *mg = CORO_MAGIC_cv (cv);
273 AV *av;
274 647
275 if (!mg) 648 if (ecb_expect_false (!mg))
276 {
277 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
278 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
279 mg->mg_virtual = &vtbl_coro;
280 mg->mg_obj = (SV *)newAV ();
281 } 649 {
650 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
651 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
652 mg->mg_len = 1; /* so mg_free frees mg_ptr */
653 }
654 else
655 Renew (mg->mg_ptr,
656 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
657 char);
282 658
283 av = (AV *)mg->mg_obj; 659 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
284
285 if (AvFILLp (av) >= AvMAX (av))
286 av_extend (av, AvMAX (av) + 1);
287
288 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289} 660}
290 661
291#define SB do { 662/** load & save, init *******************************************************/
292#define SE } while (0)
293 663
294#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 664ecb_inline void
665swap_sv (SV *a, SV *b)
666{
667 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
668 SV tmp;
295 669
670 /* swap sv_any */
671 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
672
673 /* swap sv_flags */
674 SvFLAGS (&tmp) = SvFLAGS (a);
675 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
676 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
677
678#if PERL_VERSION_ATLEAST (5,10,0)
679 /* perl 5.10 and later complicates this _quite_ a bit, but it also
680 * is much faster, so no quarrels here. alternatively, we could
681 * sv_upgrade to avoid this.
682 */
683 {
684 /* swap sv_u */
685 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
686
687 /* if SvANY points to the head, we need to adjust the pointers,
688 * as the pointer for a still points to b, and maybe vice versa.
689 */
690 #define svany_in_head(type) \
691 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
692
693 if (svany_in_head (SvTYPE (a)))
694 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
695
696 if (svany_in_head (SvTYPE (b)))
697 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
698 }
699#endif
700}
701
702/* swap sv heads, at least logically */
296static void 703static void
704swap_svs (pTHX_ Coro__State c)
705{
706 int i;
707
708 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
709 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
710}
711
712#define SWAP_SVS(coro) \
713 if (ecb_expect_false ((coro)->swap_sv)) \
714 swap_svs (aTHX_ (coro))
715
716static void
717on_enterleave_call (pTHX_ SV *cb);
718
719static void
297load_perl (Coro__State c) 720load_perl (pTHX_ Coro__State c)
298{ 721{
299#define VAR(name,type) PL_ ## name = c->name; 722 perl_slots *slot = c->slot;
723 c->slot = 0;
724
725 PL_mainstack = c->mainstack;
726
727#if CORO_JIT
728 load_perl_slots (slot);
729#else
730 #define VARx(name,expr,type) expr = slot->name;
300# include "state.h" 731 #include "state.h"
301#undef VAR 732#endif
302
303 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
304 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
305 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
306 if (c->irssv) REPLACE_SV (PL_rs , c->irssv);
307 733
308 { 734 {
309 dSP; 735 dSP;
736
310 CV *cv; 737 CV *cv;
311 738
312 /* now do the ugly restore mess */ 739 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 740 while (ecb_expect_true (cv = (CV *)POPs))
314 { 741 {
315 put_padlist (cv); /* mark this padlist as available */ 742 put_padlist (aTHX_ cv); /* mark this padlist as available */
316 CvDEPTH (cv) = PTR2IV (POPs); 743 CvDEPTH (cv) = PTR2IV (POPs);
317 CvPADLIST (cv) = (AV *)POPs; 744 CvPADLIST (cv) = (PADLIST *)POPs;
318 } 745 }
319 746
320 PUTBACK; 747 PUTBACK;
321 } 748 }
322}
323 749
750 slf_frame = c->slf_frame;
751 CORO_THROW = c->except;
752
753 if (ecb_expect_false (enable_times))
754 {
755 if (ecb_expect_false (!times_valid))
756 coro_times_update ();
757
758 coro_times_sub (c);
759 }
760
761 if (ecb_expect_false (c->on_enter))
762 {
763 int i;
764
765 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
766 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
767 }
768
769 SWAP_SVS (c);
770}
771
324static void 772static void
325save_perl (Coro__State c) 773save_perl (pTHX_ Coro__State c)
326{ 774{
775 SWAP_SVS (c);
776
777 if (ecb_expect_false (c->on_leave))
778 {
779 int i;
780
781 for (i = AvFILLp (c->on_leave); i >= 0; --i)
782 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
783 }
784
785 times_valid = 0;
786
787 if (ecb_expect_false (enable_times))
788 {
789 coro_times_update (); times_valid = 1;
790 coro_times_add (c);
791 }
792
793 c->except = CORO_THROW;
794 c->slf_frame = slf_frame;
795
327 { 796 {
328 dSP; 797 dSP;
329 I32 cxix = cxstack_ix; 798 I32 cxix = cxstack_ix;
330 PERL_CONTEXT *ccstk = cxstack; 799 PERL_CONTEXT *ccstk = cxstack;
331 PERL_SI *top_si = PL_curstackinfo; 800 PERL_SI *top_si = PL_curstackinfo;
… …
333 /* 802 /*
334 * the worst thing you can imagine happens first - we have to save 803 * the worst thing you can imagine happens first - we have to save
335 * (and reinitialize) all cv's in the whole callchain :( 804 * (and reinitialize) all cv's in the whole callchain :(
336 */ 805 */
337 806
338 PUSHs (Nullsv); 807 XPUSHs (Nullsv);
339 /* this loop was inspired by pp_caller */ 808 /* this loop was inspired by pp_caller */
340 for (;;) 809 for (;;)
341 { 810 {
342 while (cxix >= 0) 811 while (ecb_expect_true (cxix >= 0))
343 { 812 {
344 PERL_CONTEXT *cx = &ccstk[cxix--]; 813 PERL_CONTEXT *cx = &ccstk[cxix--];
345 814
346 if (CxTYPE (cx) == CXt_SUB) 815 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
347 { 816 {
348 CV *cv = cx->blk_sub.cv; 817 CV *cv = cx->blk_sub.cv;
349 818
350 if (CvDEPTH (cv)) 819 if (ecb_expect_true (CvDEPTH (cv)))
351 { 820 {
352 EXTEND (SP, 3); 821 EXTEND (SP, 3);
353
354 PUSHs ((SV *)CvPADLIST (cv)); 822 PUSHs ((SV *)CvPADLIST (cv));
355 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 823 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 824 PUSHs ((SV *)cv);
357 825
358 CvDEPTH (cv) = 0; 826 CvDEPTH (cv) = 0;
359 get_padlist (cv); 827 get_padlist (aTHX_ cv);
360 } 828 }
361 } 829 }
362#ifdef CXt_FORMAT
363 else if (CxTYPE (cx) == CXt_FORMAT)
364 {
365 /* I never used formats, so how should I know how these are implemented? */
366 /* my bold guess is as a simple, plain sub... */
367 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
368 }
369#endif
370 } 830 }
371 831
372 if (top_si->si_type == PERLSI_MAIN) 832 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
373 break; 833 break;
374 834
375 top_si = top_si->si_prev; 835 top_si = top_si->si_prev;
376 ccstk = top_si->si_cxstack; 836 ccstk = top_si->si_cxstack;
377 cxix = top_si->si_cxix; 837 cxix = top_si->si_cxix;
378 } 838 }
379 839
380 PUTBACK; 840 PUTBACK;
381 } 841 }
382 842
383 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 843 /* allocate some space on the context stack for our purposes */
384 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 844 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
385 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 845 {
386 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 846 unsigned int i;
387 847
388#define VAR(name,type)c->name = PL_ ## name; 848 for (i = 0; i < SLOT_COUNT; ++i)
849 CXINC;
850
851 cxstack_ix -= SLOT_COUNT; /* undo allocation */
852 }
853
854 c->mainstack = PL_mainstack;
855
856 {
857 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
858
859#if CORO_JIT
860 save_perl_slots (slot);
861#else
862 #define VARx(name,expr,type) slot->name = expr;
389# include "state.h" 863 #include "state.h"
390#undef VAR 864#endif
865 }
391} 866}
392 867
393/* 868/*
394 * allocate various perl stacks. This is an exact copy 869 * allocate various perl stacks. This is almost an exact copy
395 * of perl.c:init_stacks, except that it uses less memory 870 * of perl.c:init_stacks, except that it uses less memory
396 * on the (sometimes correct) assumption that coroutines do 871 * on the (sometimes correct) assumption that coroutines do
397 * not usually need a lot of stackspace. 872 * not usually need a lot of stackspace.
398 */ 873 */
874#if CORO_PREFER_PERL_FUNCTIONS
875# define coro_init_stacks(thx) init_stacks ()
876#else
399static void 877static void
400coro_init_stacks () 878coro_init_stacks (pTHX)
401{ 879{
402 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 880 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
403 PL_curstackinfo->si_type = PERLSI_MAIN; 881 PL_curstackinfo->si_type = PERLSI_MAIN;
404 PL_curstack = PL_curstackinfo->si_stack; 882 PL_curstack = PL_curstackinfo->si_stack;
405 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 883 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
406 884
407 PL_stack_base = AvARRAY(PL_curstack); 885 PL_stack_base = AvARRAY(PL_curstack);
408 PL_stack_sp = PL_stack_base; 886 PL_stack_sp = PL_stack_base;
409 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 887 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
410 888
411 New(50,PL_tmps_stack,128,SV*); 889 New(50,PL_tmps_stack,32,SV*);
412 PL_tmps_floor = -1; 890 PL_tmps_floor = -1;
413 PL_tmps_ix = -1; 891 PL_tmps_ix = -1;
414 PL_tmps_max = 128; 892 PL_tmps_max = 32;
415 893
416 New(54,PL_markstack,32,I32); 894 New(54,PL_markstack,16,I32);
417 PL_markstack_ptr = PL_markstack; 895 PL_markstack_ptr = PL_markstack;
418 PL_markstack_max = PL_markstack + 32; 896 PL_markstack_max = PL_markstack + 16;
419 897
420#ifdef SET_MARK_OFFSET 898#ifdef SET_MARK_OFFSET
421 SET_MARK_OFFSET; 899 SET_MARK_OFFSET;
422#endif 900#endif
423 901
424 New(54,PL_scopestack,32,I32); 902 New(54,PL_scopestack,8,I32);
425 PL_scopestack_ix = 0; 903 PL_scopestack_ix = 0;
426 PL_scopestack_max = 32; 904 PL_scopestack_max = 8;
905#if HAS_SCOPESTACK_NAME
906 New(54,PL_scopestack_name,8,const char*);
907#endif
427 908
428 New(54,PL_savestack,64,ANY); 909 New(54,PL_savestack,24,ANY);
429 PL_savestack_ix = 0; 910 PL_savestack_ix = 0;
430 PL_savestack_max = 64; 911 PL_savestack_max = 24;
431 912
432#if !PERL_VERSION_ATLEAST (5,9,0) 913#if !PERL_VERSION_ATLEAST (5,10,0)
433 New(54,PL_retstack,16,OP*); 914 New(54,PL_retstack,4,OP*);
434 PL_retstack_ix = 0; 915 PL_retstack_ix = 0;
435 PL_retstack_max = 16; 916 PL_retstack_max = 4;
436#endif 917#endif
437} 918}
919#endif
438 920
439/* 921/*
440 * destroy the stacks, the callchain etc... 922 * destroy the stacks, the callchain etc...
441 */ 923 */
442static void 924static void
443coro_destroy_stacks () 925coro_destruct_stacks (pTHX)
444{ 926{
445 if (!IN_DESTRUCT)
446 {
447 /* is this ugly, I ask? */
448 LEAVE_SCOPE (0);
449
450 /* sure it is, but more important: is it correct?? :/ */
451 FREETMPS;
452
453 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
454 }
455
456 while (PL_curstackinfo->si_next) 927 while (PL_curstackinfo->si_next)
457 PL_curstackinfo = PL_curstackinfo->si_next; 928 PL_curstackinfo = PL_curstackinfo->si_next;
458 929
459 while (PL_curstackinfo) 930 while (PL_curstackinfo)
460 { 931 {
461 PERL_SI *p = PL_curstackinfo->si_prev; 932 PERL_SI *p = PL_curstackinfo->si_prev;
462 933
463 { /*D*//*remove*/
464 dSP;
465 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
466 PUTBACK; /* possibly superfluous */
467 }
468
469 if (!IN_DESTRUCT) 934 if (!IN_DESTRUCT)
470 {
471 dounwind (-1);/*D*//*remove*/
472 SvREFCNT_dec (PL_curstackinfo->si_stack); 935 SvREFCNT_dec (PL_curstackinfo->si_stack);
473 }
474 936
475 Safefree (PL_curstackinfo->si_cxstack); 937 Safefree (PL_curstackinfo->si_cxstack);
476 Safefree (PL_curstackinfo); 938 Safefree (PL_curstackinfo);
477 PL_curstackinfo = p; 939 PL_curstackinfo = p;
478 } 940 }
479 941
480 Safefree (PL_tmps_stack); 942 Safefree (PL_tmps_stack);
481 Safefree (PL_markstack); 943 Safefree (PL_markstack);
482 Safefree (PL_scopestack); 944 Safefree (PL_scopestack);
945#if HAS_SCOPESTACK_NAME
946 Safefree (PL_scopestack_name);
947#endif
483 Safefree (PL_savestack); 948 Safefree (PL_savestack);
484#if !PERL_VERSION_ATLEAST (5,9,0) 949#if !PERL_VERSION_ATLEAST (5,10,0)
485 Safefree (PL_retstack); 950 Safefree (PL_retstack);
486#endif 951#endif
487} 952}
488 953
954#define CORO_RSS \
955 rss += sizeof (SYM (curstackinfo)); \
956 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
957 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
958 rss += SYM (tmps_max) * sizeof (SV *); \
959 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
960 rss += SYM (scopestack_max) * sizeof (I32); \
961 rss += SYM (savestack_max) * sizeof (ANY);
962
963static size_t
964coro_rss (pTHX_ struct coro *coro)
965{
966 size_t rss = sizeof (*coro);
967
968 if (coro->mainstack)
969 {
970 if (coro->flags & CF_RUNNING)
971 {
972 #define SYM(sym) PL_ ## sym
973 CORO_RSS;
974 #undef SYM
975 }
976 else
977 {
978 #define SYM(sym) coro->slot->sym
979 CORO_RSS;
980 #undef SYM
981 }
982 }
983
984 return rss;
985}
986
987/** coroutine stack handling ************************************************/
988
989static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
990static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
991static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
992
993/* apparently < 5.8.8 */
994#ifndef MgPV_nolen_const
995#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
996 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
997 (const char*)(mg)->mg_ptr)
998#endif
999
1000/*
1001 * This overrides the default magic get method of %SIG elements.
1002 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1003 * and instead of trying to save and restore the hash elements (extremely slow),
1004 * we just provide our own readback here.
1005 */
1006static int ecb_cold
1007coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1008{
1009 const char *s = MgPV_nolen_const (mg);
1010
1011 if (*s == '_')
1012 {
1013 SV **svp = 0;
1014
1015 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1016 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1017
1018 if (svp)
1019 {
1020 SV *ssv;
1021
1022 if (!*svp)
1023 ssv = &PL_sv_undef;
1024 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1025 ssv = sv_2mortal (newRV_inc (*svp));
1026 else
1027 ssv = *svp;
1028
1029 sv_setsv (sv, ssv);
1030 return 0;
1031 }
1032 }
1033
1034 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1035}
1036
1037static int ecb_cold
1038coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1039{
1040 const char *s = MgPV_nolen_const (mg);
1041
1042 if (*s == '_')
1043 {
1044 SV **svp = 0;
1045
1046 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1047 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1048
1049 if (svp)
1050 {
1051 SV *old = *svp;
1052 *svp = 0;
1053 SvREFCNT_dec (old);
1054 return 0;
1055 }
1056 }
1057
1058 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1059}
1060
1061static int ecb_cold
1062coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1063{
1064 const char *s = MgPV_nolen_const (mg);
1065
1066 if (*s == '_')
1067 {
1068 SV **svp = 0;
1069
1070 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1071 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1072
1073 if (svp)
1074 {
1075 SV *old = *svp;
1076 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1077 SvREFCNT_dec (old);
1078 return 0;
1079 }
1080 }
1081
1082 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1083}
1084
1085static void
1086prepare_nop (pTHX_ struct coro_transfer_args *ta)
1087{
1088 /* kind of mega-hacky, but works */
1089 ta->next = ta->prev = (struct coro *)ta;
1090}
1091
489static void 1092static int
490setup_coro (struct coro *coro) 1093slf_check_nop (pTHX_ struct CoroSLF *frame)
1094{
1095 return 0;
1096}
1097
1098static int
1099slf_check_repeat (pTHX_ struct CoroSLF *frame)
1100{
1101 return 1;
1102}
1103
1104static UNOP init_perl_op;
1105
1106ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1107init_perl (pTHX_ struct coro *coro)
491{ 1108{
492 /* 1109 /*
493 * emulate part of the perl startup here. 1110 * emulate part of the perl startup here.
494 */ 1111 */
495
496 coro_init_stacks (); 1112 coro_init_stacks (aTHX);
497 1113
1114 PL_runops = RUNOPS_DEFAULT;
498 PL_curcop = &PL_compiling; 1115 PL_curcop = &PL_compiling;
499 PL_in_eval = EVAL_NULL; 1116 PL_in_eval = EVAL_NULL;
1117 PL_comppad = 0;
1118 PL_comppad_name = 0;
1119 PL_comppad_name_fill = 0;
1120 PL_comppad_name_floor = 0;
500 PL_curpm = 0; 1121 PL_curpm = 0;
1122 PL_curpad = 0;
501 PL_localizing = 0; 1123 PL_localizing = 0;
502 PL_dirty = 0;
503 PL_restartop = 0; 1124 PL_restartop = 0;
1125#if PERL_VERSION_ATLEAST (5,10,0)
1126 PL_parser = 0;
1127#endif
1128 PL_hints = 0;
1129
1130 /* recreate the die/warn hooks */
1131 PL_diehook = SvREFCNT_inc (rv_diehook);
1132 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1133
1134 GvSV (PL_defgv) = newSV (0);
1135 GvAV (PL_defgv) = coro->args; coro->args = 0;
1136 GvSV (PL_errgv) = newSV (0);
1137 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1138 GvHV (PL_hintgv) = 0;
1139 PL_rs = newSVsv (GvSV (irsgv));
1140 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
504 1141
505 { 1142 {
506 dSP; 1143 dSP;
507 LOGOP myop; 1144 UNOP myop;
508 1145
509 SvREFCNT_dec (GvAV (PL_defgv));
510 GvAV (PL_defgv) = coro->args; coro->args = 0;
511
512 Zero (&myop, 1, LOGOP); 1146 Zero (&myop, 1, UNOP);
513 myop.op_next = Nullop; 1147 myop.op_next = Nullop;
1148 myop.op_type = OP_ENTERSUB;
514 myop.op_flags = OPf_WANT_VOID; 1149 myop.op_flags = OPf_WANT_VOID;
515 1150
516 PUSHMARK (SP); 1151 PUSHMARK (SP);
517 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 1152 PUSHs ((SV *)coro->startcv);
518 PUTBACK; 1153 PUTBACK;
519 PL_op = (OP *)&myop; 1154 PL_op = (OP *)&myop;
520 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1155 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
521 SPAGAIN;
522 } 1156 }
523 1157
524 ENTER; /* necessary e.g. for dounwind */ 1158 /* this newly created coroutine might be run on an existing cctx which most
525} 1159 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1160 */
1161 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1162 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1163 slf_frame.destroy = 0;
526 1164
1165 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1166 init_perl_op.op_next = PL_op;
1167 init_perl_op.op_type = OP_ENTERSUB;
1168 init_perl_op.op_ppaddr = pp_slf;
1169 /* no flags etc. required, as an init function won't be called */
1170
1171 PL_op = (OP *)&init_perl_op;
1172
1173 /* copy throw, in case it was set before init_perl */
1174 CORO_THROW = coro->except;
1175
1176 SWAP_SVS (coro);
1177
1178 if (ecb_expect_false (enable_times))
1179 {
1180 coro_times_update ();
1181 coro_times_sub (coro);
1182 }
1183}
1184
527static void 1185static void
1186coro_unwind_stacks (pTHX)
1187{
1188 if (!IN_DESTRUCT)
1189 {
1190 /* restore all saved variables and stuff */
1191 LEAVE_SCOPE (0);
1192 assert (PL_tmps_floor == -1);
1193
1194 /* free all temporaries */
1195 FREETMPS;
1196 assert (PL_tmps_ix == -1);
1197
1198 /* unwind all extra stacks */
1199 POPSTACK_TO (PL_mainstack);
1200
1201 /* unwind main stack */
1202 dounwind (-1);
1203 }
1204}
1205
1206static void
1207destroy_perl (pTHX_ struct coro *coro)
1208{
1209 SV *svf [9];
1210
1211 {
1212 SV *old_current = SvRV (coro_current);
1213 struct coro *current = SvSTATE (old_current);
1214
1215 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1216
1217 save_perl (aTHX_ current);
1218
1219 /* this will cause transfer_check to croak on block*/
1220 SvRV_set (coro_current, (SV *)coro->hv);
1221
1222 load_perl (aTHX_ coro);
1223
1224 coro_unwind_stacks (aTHX);
1225
1226 /* restore swapped sv's */
1227 SWAP_SVS (coro);
1228
1229 coro_destruct_stacks (aTHX);
1230
1231 /* now save some sv's to be free'd later */
1232 svf [0] = GvSV (PL_defgv);
1233 svf [1] = (SV *)GvAV (PL_defgv);
1234 svf [2] = GvSV (PL_errgv);
1235 svf [3] = (SV *)PL_defoutgv;
1236 svf [4] = PL_rs;
1237 svf [5] = GvSV (irsgv);
1238 svf [6] = (SV *)GvHV (PL_hintgv);
1239 svf [7] = PL_diehook;
1240 svf [8] = PL_warnhook;
1241 assert (9 == sizeof (svf) / sizeof (*svf));
1242
1243 SvRV_set (coro_current, old_current);
1244
1245 load_perl (aTHX_ current);
1246 }
1247
1248 {
1249 unsigned int i;
1250
1251 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1252 SvREFCNT_dec (svf [i]);
1253
1254 SvREFCNT_dec (coro->saved_deffh);
1255 SvREFCNT_dec (coro->rouse_cb);
1256 SvREFCNT_dec (coro->invoke_cb);
1257 SvREFCNT_dec (coro->invoke_av);
1258 }
1259}
1260
1261ecb_inline void
528free_coro_mortal () 1262free_coro_mortal (pTHX)
529{ 1263{
530 if (coro_mortal) 1264 if (ecb_expect_true (coro_mortal))
531 { 1265 {
532 SvREFCNT_dec (coro_mortal); 1266 SvREFCNT_dec ((SV *)coro_mortal);
533 coro_mortal = 0; 1267 coro_mortal = 0;
534 } 1268 }
535} 1269}
536 1270
537/* inject a fake call to Coro::State::_cctx_init into the execution */
538static void NOINLINE
539prepare_cctx (coro_cctx *cctx)
540{
541 dSP;
542 LOGOP myop;
543
544 Zero (&myop, 1, LOGOP);
545 myop.op_next = PL_op;
546 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
547
548 PUSHMARK (SP);
549 EXTEND (SP, 2);
550 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
551 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
552 PUTBACK;
553 PL_op = (OP *)&myop;
554 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
555 SPAGAIN;
556}
557
558static void 1271static int
559coro_run (void *arg) 1272runops_trace (pTHX)
560{ 1273{
561 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1274 COP *oldcop = 0;
562 UNLOCK; 1275 int oldcxix = -2;
563 1276
564 /* 1277 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
565 * this is a _very_ stripped down perl interpreter ;) 1278 {
566 */ 1279 PERL_ASYNC_CHECK ();
1280
1281 if (cctx_current->flags & CC_TRACE_ALL)
1282 {
1283 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1284 {
1285 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1286 SV **bot, **top;
1287 AV *av = newAV (); /* return values */
1288 SV **cb;
1289 dSP;
1290
1291 GV *gv = CvGV (cx->blk_sub.cv);
1292 SV *fullname = sv_2mortal (newSV (0));
1293 if (isGV (gv))
1294 gv_efullname3 (fullname, gv, 0);
1295
1296 bot = PL_stack_base + cx->blk_oldsp + 1;
1297 top = cx->blk_gimme == G_ARRAY ? SP + 1
1298 : cx->blk_gimme == G_SCALAR ? bot + 1
1299 : bot;
1300
1301 av_extend (av, top - bot);
1302 while (bot < top)
1303 av_push (av, SvREFCNT_inc_NN (*bot++));
1304
1305 PL_runops = RUNOPS_DEFAULT;
1306 ENTER;
1307 SAVETMPS;
1308 EXTEND (SP, 3);
1309 PUSHMARK (SP);
1310 PUSHs (&PL_sv_no);
1311 PUSHs (fullname);
1312 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1313 PUTBACK;
1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1316 SPAGAIN;
1317 FREETMPS;
1318 LEAVE;
1319 PL_runops = runops_trace;
1320 }
1321
1322 if (oldcop != PL_curcop)
1323 {
1324 oldcop = PL_curcop;
1325
1326 if (PL_curcop != &PL_compiling)
1327 {
1328 SV **cb;
1329
1330 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1331 {
1332 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1333
1334 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1335 {
1336 dSP;
1337 GV *gv = CvGV (cx->blk_sub.cv);
1338 SV *fullname = sv_2mortal (newSV (0));
1339
1340 if (isGV (gv))
1341 gv_efullname3 (fullname, gv, 0);
1342
1343 PL_runops = RUNOPS_DEFAULT;
1344 ENTER;
1345 SAVETMPS;
1346 EXTEND (SP, 3);
1347 PUSHMARK (SP);
1348 PUSHs (&PL_sv_yes);
1349 PUSHs (fullname);
1350 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1351 PUTBACK;
1352 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1353 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1354 SPAGAIN;
1355 FREETMPS;
1356 LEAVE;
1357 PL_runops = runops_trace;
1358 }
1359
1360 oldcxix = cxstack_ix;
1361 }
1362
1363 if (cctx_current->flags & CC_TRACE_LINE)
1364 {
1365 dSP;
1366
1367 PL_runops = RUNOPS_DEFAULT;
1368 ENTER;
1369 SAVETMPS;
1370 EXTEND (SP, 3);
1371 PL_runops = RUNOPS_DEFAULT;
1372 PUSHMARK (SP);
1373 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1374 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1375 PUTBACK;
1376 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1377 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1378 SPAGAIN;
1379 FREETMPS;
1380 LEAVE;
1381 PL_runops = runops_trace;
1382 }
1383 }
1384 }
1385 }
1386 }
1387
1388 TAINT_NOT;
1389 return 0;
1390}
1391
1392static struct CoroSLF cctx_ssl_frame;
1393
1394static void
1395slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1396{
1397 ta->prev = 0;
1398}
1399
1400static int
1401slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1402{
1403 *frame = cctx_ssl_frame;
1404
1405 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1406}
1407
1408/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1409static void ecb_noinline
1410cctx_prepare (pTHX)
1411{
567 PL_top_env = &PL_start_env; 1412 PL_top_env = &PL_start_env;
568 1413
1414 if (cctx_current->flags & CC_TRACE)
1415 PL_runops = runops_trace;
1416
1417 /* we already must be executing an SLF op, there is no other valid way
1418 * that can lead to creation of a new cctx */
1419 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1420 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1421
1422 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1423 cctx_ssl_frame = slf_frame;
1424
1425 slf_frame.prepare = slf_prepare_set_stacklevel;
1426 slf_frame.check = slf_check_set_stacklevel;
1427}
1428
1429/* the tail of transfer: execute stuff we can only do after a transfer */
1430ecb_inline void
1431transfer_tail (pTHX)
1432{
1433 free_coro_mortal (aTHX);
1434}
1435
1436/* try to exit the same way perl's main function would do */
1437/* we do not bother resetting the environment or other things *7
1438/* that are not, uhm, essential */
1439/* this obviously also doesn't work when perl is embedded */
1440static void ecb_noinline ecb_cold
1441perlish_exit (pTHX)
1442{
1443 int exitstatus = perl_destruct (PL_curinterp);
1444 perl_free (PL_curinterp);
1445 exit (exitstatus);
1446}
1447
1448/*
1449 * this is a _very_ stripped down perl interpreter ;)
1450 */
1451static void
1452cctx_run (void *arg)
1453{
1454#ifdef USE_ITHREADS
1455# if CORO_PTHREAD
1456 PERL_SET_CONTEXT (coro_thx);
1457# endif
1458#endif
1459 {
1460 dTHX;
1461
1462 /* normally we would need to skip the entersub here */
1463 /* not doing so will re-execute it, which is exactly what we want */
1464 /* PL_nop = PL_nop->op_next */
1465
569 /* inject call to cctx_init */ 1466 /* inject a fake subroutine call to cctx_init */
570 prepare_cctx ((coro_cctx *)arg); 1467 cctx_prepare (aTHX);
571 1468
1469 /* cctx_run is the alternative tail of transfer() */
1470 transfer_tail (aTHX);
1471
572 /* somebody will hit me for both perl_run and PL_restartop */ 1472 /* somebody or something will hit me for both perl_run and PL_restartop */
573 PL_restartop = PL_op; 1473 PL_restartop = PL_op;
574 perl_run (PL_curinterp); 1474 perl_run (PL_curinterp);
1475 /*
1476 * Unfortunately, there is no way to get at the return values of the
1477 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1478 * runtime errors here, as this is just a random interpreter, not a thread.
1479 */
575 1480
576 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1481 /*
577 abort (); 1482 * If perl-run returns we assume exit() was being called or the coro
1483 * fell off the end, which seems to be the only valid (non-bug)
1484 * reason for perl_run to return. We try to mimic whatever perl is normally
1485 * doing in that case. YMMV.
1486 */
1487 perlish_exit (aTHX);
1488 }
578} 1489}
579 1490
580static coro_cctx * 1491static coro_cctx *
581cctx_new () 1492cctx_new (void)
582{ 1493{
583 coro_cctx *cctx; 1494 coro_cctx *cctx;
584 1495
585 ++cctx_count; 1496 ++cctx_count;
586
587 New (0, cctx, 1, coro_cctx); 1497 New (0, cctx, 1, coro_cctx);
588 1498
589#if HAVE_MMAP 1499 cctx->gen = cctx_gen;
1500 cctx->flags = 0;
1501 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
590 1502
591 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1503 return cctx;
592 /* mmap supposedly does allocate-on-write for us */ 1504}
593 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
594 1505
595 if (cctx->sptr == (void *)-1) 1506/* create a new cctx only suitable as source */
1507static coro_cctx *
1508cctx_new_empty (void)
1509{
1510 coro_cctx *cctx = cctx_new ();
1511
1512 cctx->stack.sptr = 0;
1513 coro_create (&cctx->cctx, 0, 0, 0, 0);
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx suitable as destination/running a perl interpreter */
1519static coro_cctx *
1520cctx_new_run (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
596 { 1525 {
597 perror ("FATAL: unable to mmap stack for coroutine"); 1526 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
598 _exit (EXIT_FAILURE); 1527 _exit (EXIT_FAILURE);
599 } 1528 }
600 1529
601# if STACKGUARD
602 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
603# endif
604
605#else
606
607 cctx->ssize = STACKSIZE * (long)sizeof (long);
608 New (0, cctx->sptr, STACKSIZE, long);
609
610 if (!cctx->sptr)
611 {
612 perror ("FATAL: unable to malloc stack for coroutine");
613 _exit (EXIT_FAILURE);
614 }
615
616#endif
617
618#if USE_VALGRIND
619 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
620 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
621 cctx->ssize + (char *)cctx->sptr
622 );
623#endif
624
625 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1530 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
626 1531
627 return cctx; 1532 return cctx;
628} 1533}
629 1534
630static void 1535static void
631cctx_destroy (coro_cctx *cctx) 1536cctx_destroy (coro_cctx *cctx)
632{ 1537{
633 if (!cctx) 1538 if (!cctx)
634 return; 1539 return;
635 1540
1541 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1542
636 --cctx_count; 1543 --cctx_count;
1544 coro_destroy (&cctx->cctx);
637 1545
638#if USE_VALGRIND 1546 coro_stack_free (&cctx->stack);
639 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
640#endif
641
642#if HAVE_MMAP
643 munmap (cctx->sptr, cctx->ssize);
644#else
645 Safefree (cctx->sptr);
646#endif
647 1547
648 Safefree (cctx); 1548 Safefree (cctx);
649} 1549}
650 1550
1551/* wether this cctx should be destructed */
1552#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1553
651static coro_cctx * 1554static coro_cctx *
652cctx_get () 1555cctx_get (pTHX)
653{ 1556{
654 coro_cctx *cctx; 1557 while (ecb_expect_true (cctx_first))
655
656 if (cctx_first)
657 { 1558 {
658 cctx = cctx_first; 1559 coro_cctx *cctx = cctx_first;
659 cctx_first = cctx->next; 1560 cctx_first = cctx->next;
660 --cctx_idle; 1561 --cctx_idle;
661 } 1562
662 else 1563 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
663 { 1564 return cctx;
664 cctx = cctx_new (); 1565
665 PL_op = PL_op->op_next; 1566 cctx_destroy (cctx);
666 } 1567 }
667 1568
668 return cctx; 1569 return cctx_new_run ();
669} 1570}
670 1571
671static void 1572static void
672cctx_put (coro_cctx *cctx) 1573cctx_put (coro_cctx *cctx)
673{ 1574{
1575 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1576
674 /* free another cctx if overlimit */ 1577 /* free another cctx if overlimit */
675 if (cctx_idle >= MAX_IDLE_CCTX) 1578 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
676 { 1579 {
677 coro_cctx *first = cctx_first; 1580 coro_cctx *first = cctx_first;
678 cctx_first = first->next; 1581 cctx_first = first->next;
679 --cctx_idle; 1582 --cctx_idle;
680 1583
681 assert (!first->inuse);
682 cctx_destroy (first); 1584 cctx_destroy (first);
683 } 1585 }
684 1586
685 ++cctx_idle; 1587 ++cctx_idle;
686 cctx->next = cctx_first; 1588 cctx->next = cctx_first;
687 cctx_first = cctx; 1589 cctx_first = cctx;
688} 1590}
689 1591
690/* never call directly, always through the coro_state_transfer global variable */ 1592/** coroutine switching *****************************************************/
691static void NOINLINE 1593
1594static void
692transfer (struct coro *prev, struct coro *next) 1595transfer_check (pTHX_ struct coro *prev, struct coro *next)
1596{
1597 /* TODO: throwing up here is considered harmful */
1598
1599 if (ecb_expect_true (prev != next))
1600 {
1601 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1602 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1603
1604 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1605 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1606
1607#if !PERL_VERSION_ATLEAST (5,10,0)
1608 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1609 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1610#endif
1611 }
1612}
1613
1614/* always use the TRANSFER macro */
1615static void ecb_noinline /* noinline so we have a fixed stackframe */
1616transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
693{ 1617{
694 dSTACKLEVEL; 1618 dSTACKLEVEL;
695 1619
696 /* sometimes transfer is only called to set idle_sp */ 1620 /* sometimes transfer is only called to set idle_sp */
697 if (!next) 1621 if (ecb_expect_false (!prev))
1622 {
698 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1623 cctx_current->idle_sp = STACKLEVEL;
699 else if (prev != next) 1624 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
700 { 1625 }
1626 else if (ecb_expect_true (prev != next))
1627 {
701 coro_cctx *prev__cctx; 1628 coro_cctx *cctx_prev;
702 1629
703 if (prev->flags & CF_NEW) 1630 if (ecb_expect_false (prev->flags & CF_NEW))
704 { 1631 {
705 /* create a new empty context */ 1632 /* create a new empty/source context */
706 Newz (0, prev->cctx, 1, coro_cctx);
707 prev->cctx->inuse = 1;
708 prev->flags &= ~CF_NEW; 1633 prev->flags &= ~CF_NEW;
709 prev->flags |= CF_RUNNING; 1634 prev->flags |= CF_RUNNING;
710 } 1635 }
711 1636
712 /*TODO: must not croak here */
713 if (!prev->flags & CF_RUNNING)
714 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
715
716 if (next->flags & CF_RUNNING)
717 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
718
719 prev->flags &= ~CF_RUNNING; 1637 prev->flags &= ~CF_RUNNING;
720 next->flags |= CF_RUNNING; 1638 next->flags |= CF_RUNNING;
721 1639
722 LOCK; 1640 /* first get rid of the old state */
1641 save_perl (aTHX_ prev);
723 1642
724 if (next->flags & CF_NEW) 1643 if (ecb_expect_false (next->flags & CF_NEW))
725 { 1644 {
726 /* need to start coroutine */ 1645 /* need to start coroutine */
727 next->flags &= ~CF_NEW; 1646 next->flags &= ~CF_NEW;
728 /* first get rid of the old state */
729 save_perl (prev);
730 /* setup coroutine call */ 1647 /* setup coroutine call */
731 setup_coro (next); 1648 init_perl (aTHX_ next);
732 /* need a new stack */
733 assert (!next->stack);
734 } 1649 }
735 else 1650 else
1651 load_perl (aTHX_ next);
1652
1653 /* possibly untie and reuse the cctx */
1654 if (ecb_expect_true (
1655 cctx_current->idle_sp == STACKLEVEL
1656 && !(cctx_current->flags & CC_TRACE)
1657 && !force_cctx
1658 ))
736 { 1659 {
737 /* coroutine already started */ 1660 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
738 save_perl (prev); 1661 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
739 load_perl (next); 1662
1663 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1664 /* without this the next cctx_get might destroy the running cctx while still in use */
1665 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1666 if (ecb_expect_true (!next->cctx))
1667 next->cctx = cctx_get (aTHX);
1668
1669 cctx_put (cctx_current);
740 } 1670 }
1671 else
1672 prev->cctx = cctx_current;
741 1673
742 prev__cctx = prev->cctx; 1674 ++next->usecount;
743 1675
744 /* possibly "free" the cctx */ 1676 cctx_prev = cctx_current;
745 if (prev__cctx->idle_sp == STACKLEVEL) 1677 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1678
1679 next->cctx = 0;
1680
1681 if (ecb_expect_false (cctx_prev != cctx_current))
746 { 1682 {
747 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1683 cctx_prev->top_env = PL_top_env;
748 assert (PL_top_env == prev__cctx->top_env); 1684 PL_top_env = cctx_current->top_env;
749 1685 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
750 prev->cctx = 0;
751
752 cctx_put (prev__cctx);
753 prev__cctx->inuse = 0;
754 } 1686 }
755 1687
756 if (!next->cctx) 1688 transfer_tail (aTHX);
757 {
758 next->cctx = cctx_get ();
759 assert (!next->cctx->inuse);
760 next->cctx->inuse = 1;
761 }
762
763 if (prev__cctx != next->cctx)
764 {
765 prev__cctx->top_env = PL_top_env;
766 PL_top_env = next->cctx->top_env;
767 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
768 }
769
770 free_coro_mortal ();
771
772 UNLOCK;
773 } 1689 }
774} 1690}
775 1691
776struct transfer_args 1692#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
777{
778 struct coro *prev, *next;
779};
780
781#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1693#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
782 1694
1695/** high level stuff ********************************************************/
1696
1697/* this function is actually Coro, not Coro::State, but we call it from here */
1698/* because it is convenient - but it hasn't been declared yet for that reason */
783static void 1699static void
1700coro_call_on_destroy (pTHX_ struct coro *coro);
1701
1702static void
784coro_state_destroy (struct coro *coro) 1703coro_state_destroy (pTHX_ struct coro *coro)
785{ 1704{
786 if (coro->refcnt--) 1705 if (coro->flags & CF_ZOMBIE)
787 return; 1706 return;
788 1707
789 if (coro->mainstack && coro->mainstack != main_mainstack) 1708 slf_destroy (aTHX_ coro);
790 {
791 struct coro temp;
792 Zero (&temp, 1, struct coro);
793 temp.save = CORO_SAVE_ALL;
794 1709
1710 coro->flags |= CF_ZOMBIE;
1711
795 if (coro->flags & CF_RUNNING) 1712 if (coro->flags & CF_READY)
796 croak ("FATAL: tried to destroy currently running coroutine");
797
798 save_perl (&temp);
799 load_perl (coro);
800
801 coro_destroy_stacks ();
802
803 load_perl (&temp); /* this will get rid of defsv etc.. */
804
805 coro->mainstack = 0;
806 } 1713 {
1714 /* reduce nready, as destroying a ready coro effectively unreadies it */
1715 /* alternative: look through all ready queues and remove the coro */
1716 --coro_nready;
1717 }
1718 else
1719 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1720
1721 if (coro->next) coro->next->prev = coro->prev;
1722 if (coro->prev) coro->prev->next = coro->next;
1723 if (coro == coro_first) coro_first = coro->next;
1724
1725 if (coro->mainstack
1726 && coro->mainstack != main_mainstack
1727 && coro->slot
1728 && !PL_dirty)
1729 destroy_perl (aTHX_ coro);
807 1730
808 cctx_destroy (coro->cctx); 1731 cctx_destroy (coro->cctx);
1732 SvREFCNT_dec (coro->startcv);
809 SvREFCNT_dec (coro->args); 1733 SvREFCNT_dec (coro->args);
810 Safefree (coro); 1734 SvREFCNT_dec (coro->swap_sv);
1735 SvREFCNT_dec (CORO_THROW);
1736
1737 coro_call_on_destroy (aTHX_ coro);
1738
1739 /* more destruction mayhem in coro_state_free */
811} 1740}
812 1741
813static int 1742static int
814coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1743coro_state_free (pTHX_ SV *sv, MAGIC *mg)
815{ 1744{
816 struct coro *coro = (struct coro *)mg->mg_ptr; 1745 struct coro *coro = (struct coro *)mg->mg_ptr;
817 mg->mg_ptr = 0; 1746 mg->mg_ptr = 0;
818 1747
819 coro_state_destroy (coro); 1748 coro_state_destroy (aTHX_ coro);
1749 SvREFCNT_dec (coro->on_destroy);
1750 SvREFCNT_dec (coro->status);
1751
1752 Safefree (coro);
820 1753
821 return 0; 1754 return 0;
822} 1755}
823 1756
824static int 1757static int ecb_cold
825coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1758coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
826{ 1759{
827 struct coro *coro = (struct coro *)mg->mg_ptr; 1760 /* called when perl clones the current process the slow way (windows process emulation) */
828 1761 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
829 ++coro->refcnt; 1762 mg->mg_ptr = 0;
1763 mg->mg_virtual = 0;
830 1764
831 return 0; 1765 return 0;
832} 1766}
833 1767
834static MGVTBL coro_state_vtbl = { 1768static MGVTBL coro_state_vtbl = {
835 0, 0, 0, 0, 1769 0, 0, 0, 0,
836 coro_state_clear, 1770 coro_state_free,
837 0, 1771 0,
838#ifdef MGf_DUP 1772#ifdef MGf_DUP
839 coro_state_dup, 1773 coro_state_dup,
840#else 1774#else
841# define MGf_DUP 0 1775# define MGf_DUP 0
842#endif 1776#endif
843}; 1777};
844 1778
845static struct coro *
846SvSTATE (SV *coro)
847{
848 HV *stash;
849 MAGIC *mg;
850
851 if (SvROK (coro))
852 coro = SvRV (coro);
853
854 stash = SvSTASH (coro);
855 if (stash != coro_stash && stash != coro_state_stash)
856 {
857 /* very slow, but rare, check */
858 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859 croak ("Coro::State object required");
860 }
861
862 mg = SvMAGIC (coro);
863 assert (mg->mg_type == PERL_MAGIC_ext);
864 return (struct coro *)mg->mg_ptr;
865}
866
867static void 1779static void
868prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1780prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
869{ 1781{
870 ta->prev = SvSTATE (prev_sv); 1782 ta->prev = SvSTATE (prev_sv);
871 ta->next = SvSTATE (next_sv); 1783 ta->next = SvSTATE (next_sv);
1784 TRANSFER_CHECK (*ta);
872} 1785}
873 1786
874static void 1787static void
875api_transfer (SV *prev_sv, SV *next_sv) 1788api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
876{ 1789{
877 struct transfer_args ta; 1790 struct coro_transfer_args ta;
878 1791
879 prepare_transfer (&ta, prev_sv, next_sv); 1792 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
880 TRANSFER (ta); 1793 TRANSFER (ta, 1);
1794}
1795
1796/** Coro ********************************************************************/
1797
1798ecb_inline void
1799coro_enq (pTHX_ struct coro *coro)
1800{
1801 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1802
1803 SvREFCNT_inc_NN (coro->hv);
1804
1805 coro->next_ready = 0;
1806 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1807 ready [1] = coro;
1808}
1809
1810ecb_inline struct coro *
1811coro_deq (pTHX)
1812{
1813 int prio;
1814
1815 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1816 {
1817 struct coro **ready = coro_ready [prio];
1818
1819 if (ready [0])
1820 {
1821 struct coro *coro = ready [0];
1822 ready [0] = coro->next_ready;
1823 return coro;
1824 }
1825 }
1826
1827 return 0;
1828}
1829
1830static void
1831invoke_sv_ready_hook_helper (void)
1832{
1833 dTHX;
1834 dSP;
1835
1836 ENTER;
1837 SAVETMPS;
1838
1839 PUSHMARK (SP);
1840 PUTBACK;
1841 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1842
1843 FREETMPS;
1844 LEAVE;
881} 1845}
882 1846
883static int 1847static int
884api_save (SV *coro_sv, int new_save) 1848api_ready (pTHX_ SV *coro_sv)
885{ 1849{
886 struct coro *coro = SvSTATE (coro_sv); 1850 struct coro *coro = SvSTATE (coro_sv);
887 int old_save = coro->save;
888
889 if (new_save >= 0)
890 coro->save = new_save;
891
892 return old_save;
893}
894
895/** Coro ********************************************************************/
896
897#define PRIO_MAX 3
898#define PRIO_HIGH 1
899#define PRIO_NORMAL 0
900#define PRIO_LOW -1
901#define PRIO_IDLE -3
902#define PRIO_MIN -4
903
904/* for Coro.pm */
905static SV *coro_current;
906static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
907static int coro_nready;
908
909static void
910coro_enq (SV *coro_sv)
911{
912 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
913 coro_nready++;
914}
915
916static SV *
917coro_deq (int min_prio)
918{
919 int prio = PRIO_MAX - PRIO_MIN;
920
921 min_prio -= PRIO_MIN;
922 if (min_prio < 0)
923 min_prio = 0;
924
925 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
926 if (AvFILLp (coro_ready [prio]) >= 0)
927 {
928 coro_nready--;
929 return av_shift (coro_ready [prio]);
930 }
931
932 return 0;
933}
934
935static int
936api_ready (SV *coro_sv)
937{
938 struct coro *coro;
939
940 if (SvROK (coro_sv))
941 coro_sv = SvRV (coro_sv);
942
943 coro = SvSTATE (coro_sv);
944 1851
945 if (coro->flags & CF_READY) 1852 if (coro->flags & CF_READY)
946 return 0; 1853 return 0;
947 1854
948#if 0 /* this is actually harmless */ 1855 coro->flags |= CF_READY;
1856
1857 coro_enq (aTHX_ coro);
1858
1859 if (!coro_nready++)
1860 if (coroapi.readyhook)
1861 coroapi.readyhook ();
1862
1863 return 1;
1864}
1865
1866static int
1867api_is_ready (pTHX_ SV *coro_sv)
1868{
1869 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1870}
1871
1872/* expects to own a reference to next->hv */
1873ecb_inline void
1874prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1875{
1876 SV *prev_sv = SvRV (coro_current);
1877
1878 ta->prev = SvSTATE_hv (prev_sv);
1879 ta->next = next;
1880
1881 TRANSFER_CHECK (*ta);
1882
1883 SvRV_set (coro_current, (SV *)next->hv);
1884
1885 free_coro_mortal (aTHX);
1886 coro_mortal = prev_sv;
1887}
1888
1889static void
1890prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1891{
1892 for (;;)
1893 {
1894 struct coro *next = coro_deq (aTHX);
1895
1896 if (ecb_expect_true (next))
1897 {
1898 /* cannot transfer to destroyed coros, skip and look for next */
1899 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1900 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1901 else
1902 {
1903 next->flags &= ~CF_READY;
1904 --coro_nready;
1905
1906 prepare_schedule_to (aTHX_ ta, next);
1907 break;
1908 }
1909 }
1910 else
1911 {
1912 /* nothing to schedule: call the idle handler */
1913 if (SvROK (sv_idle)
1914 && SvOBJECT (SvRV (sv_idle)))
1915 {
1916 if (SvRV (sv_idle) == SvRV (coro_current))
1917 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
1918
1919 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1920 api_ready (aTHX_ SvRV (sv_idle));
1921 --coro_nready;
1922 }
1923 else
1924 {
1925 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1926 dSP;
1927
1928 ENTER;
1929 SAVETMPS;
1930
1931 PUSHMARK (SP);
1932 PUTBACK;
1933 call_sv (sv_idle, G_VOID | G_DISCARD);
1934
1935 FREETMPS;
1936 LEAVE;
1937 }
1938 }
1939 }
1940}
1941
1942ecb_inline void
1943prepare_cede (pTHX_ struct coro_transfer_args *ta)
1944{
1945 api_ready (aTHX_ coro_current);
1946 prepare_schedule (aTHX_ ta);
1947}
1948
1949ecb_inline void
1950prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1951{
1952 SV *prev = SvRV (coro_current);
1953
1954 if (coro_nready)
1955 {
1956 prepare_schedule (aTHX_ ta);
1957 api_ready (aTHX_ prev);
1958 }
1959 else
1960 prepare_nop (aTHX_ ta);
1961}
1962
1963static void
1964api_schedule (pTHX)
1965{
1966 struct coro_transfer_args ta;
1967
1968 prepare_schedule (aTHX_ &ta);
1969 TRANSFER (ta, 1);
1970}
1971
1972static void
1973api_schedule_to (pTHX_ SV *coro_sv)
1974{
1975 struct coro_transfer_args ta;
1976 struct coro *next = SvSTATE (coro_sv);
1977
1978 SvREFCNT_inc_NN (coro_sv);
1979 prepare_schedule_to (aTHX_ &ta, next);
1980}
1981
1982static int
1983api_cede (pTHX)
1984{
1985 struct coro_transfer_args ta;
1986
1987 prepare_cede (aTHX_ &ta);
1988
1989 if (ecb_expect_true (ta.prev != ta.next))
1990 {
1991 TRANSFER (ta, 1);
1992 return 1;
1993 }
1994 else
1995 return 0;
1996}
1997
1998static int
1999api_cede_notself (pTHX)
2000{
2001 if (coro_nready)
2002 {
2003 struct coro_transfer_args ta;
2004
2005 prepare_cede_notself (aTHX_ &ta);
2006 TRANSFER (ta, 1);
2007 return 1;
2008 }
2009 else
2010 return 0;
2011}
2012
2013static void
2014api_trace (pTHX_ SV *coro_sv, int flags)
2015{
2016 struct coro *coro = SvSTATE (coro_sv);
2017
949 if (coro->flags & CF_RUNNING) 2018 if (coro->flags & CF_RUNNING)
950 croak ("Coro::ready called on currently running coroutine"); 2019 croak ("cannot enable tracing on a running coroutine, caught");
951#endif
952 2020
953 coro->flags |= CF_READY; 2021 if (flags & CC_TRACE)
2022 {
2023 if (!coro->cctx)
2024 coro->cctx = cctx_new_run ();
2025 else if (!(coro->cctx->flags & CC_TRACE))
2026 croak ("cannot enable tracing on coroutine with custom stack, caught");
954 2027
955 LOCK; 2028 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
956 coro_enq (SvREFCNT_inc (coro_sv)); 2029 }
957 UNLOCK; 2030 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2031 {
2032 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2033
2034 if (coro->flags & CF_RUNNING)
2035 PL_runops = RUNOPS_DEFAULT;
2036 else
2037 coro->slot->runops = RUNOPS_DEFAULT;
2038 }
2039}
2040
2041static void
2042coro_push_av (pTHX_ AV *av, I32 gimme_v)
2043{
2044 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2045 {
2046 dSP;
2047
2048 if (gimme_v == G_SCALAR)
2049 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2050 else
2051 {
2052 int i;
2053 EXTEND (SP, AvFILLp (av) + 1);
2054
2055 for (i = 0; i <= AvFILLp (av); ++i)
2056 PUSHs (AvARRAY (av)[i]);
2057 }
2058
2059 PUTBACK;
2060 }
2061}
2062
2063static void
2064coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2065{
2066 if (!coro->on_destroy)
2067 coro->on_destroy = newAV ();
2068
2069 av_push (coro->on_destroy, cb);
2070}
2071
2072static void
2073slf_destroy_join (pTHX_ struct CoroSLF *frame)
2074{
2075 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2076}
2077
2078static int
2079slf_check_join (pTHX_ struct CoroSLF *frame)
2080{
2081 struct coro *coro = (struct coro *)frame->data;
2082
2083 if (!coro->status)
2084 return 1;
2085
2086 frame->destroy = 0;
2087
2088 coro_push_av (aTHX_ coro->status, GIMME_V);
2089
2090 SvREFCNT_dec ((SV *)coro->hv);
2091
2092 return 0;
2093}
2094
2095static void
2096slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2097{
2098 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2099
2100 if (items > 1)
2101 croak ("join called with too many arguments");
2102
2103 if (coro->status)
2104 frame->prepare = prepare_nop;
2105 else
2106 {
2107 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2108 frame->prepare = prepare_schedule;
2109 }
2110
2111 frame->check = slf_check_join;
2112 frame->destroy = slf_destroy_join;
2113 frame->data = (void *)coro;
2114 SvREFCNT_inc (coro->hv);
2115}
2116
2117static void
2118coro_call_on_destroy (pTHX_ struct coro *coro)
2119{
2120 AV *od = coro->on_destroy;
2121
2122 if (!od)
2123 return;
2124
2125 coro->on_destroy = 0;
2126 sv_2mortal ((SV *)od);
2127
2128 while (AvFILLp (od) >= 0)
2129 {
2130 SV *cb = sv_2mortal (av_pop (od));
2131
2132 /* coro hv's (and only hv's at the moment) are supported as well */
2133 if (SvSTATEhv_p (aTHX_ cb))
2134 api_ready (aTHX_ cb);
2135 else
2136 {
2137 dSP; /* don't disturb outer sp */
2138 PUSHMARK (SP);
2139
2140 if (coro->status)
2141 {
2142 PUTBACK;
2143 coro_push_av (aTHX_ coro->status, G_ARRAY);
2144 SPAGAIN;
2145 }
2146
2147 PUTBACK;
2148 call_sv (cb, G_VOID | G_DISCARD);
2149 }
2150 }
2151}
2152
2153static void
2154coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2155{
2156 AV *av;
2157
2158 if (coro->status)
2159 {
2160 av = coro->status;
2161 av_clear (av);
2162 }
2163 else
2164 av = coro->status = newAV ();
2165
2166 /* items are actually not so common, so optimise for this case */
2167 if (items)
2168 {
2169 int i;
2170
2171 av_extend (av, items - 1);
2172
2173 for (i = 0; i < items; ++i)
2174 av_push (av, SvREFCNT_inc_NN (arg [i]));
2175 }
2176}
2177
2178static void
2179slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2180{
2181 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2182 api_ready (aTHX_ sv_manager);
2183
2184 frame->prepare = prepare_schedule;
2185 frame->check = slf_check_repeat;
2186
2187 /* as a minor optimisation, we could unwind all stacks here */
2188 /* but that puts extra pressure on pp_slf, and is not worth much */
2189 /*coro_unwind_stacks (aTHX);*/
2190}
2191
2192static void
2193slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2194{
2195 HV *coro_hv = (HV *)SvRV (coro_current);
2196
2197 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2198 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2199}
2200
2201static void
2202slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2203{
2204 HV *coro_hv;
2205 struct coro *coro;
2206
2207 if (items <= 0)
2208 croak ("Coro::cancel called without coro object,");
2209
2210 coro = SvSTATE (arg [0]);
2211 coro_hv = coro->hv;
2212
2213 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2214
2215 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2216 {
2217 /* coro currently busy cancelling something, so just notify it */
2218 coro->slf_frame.data = (void *)coro;
2219
2220 frame->prepare = prepare_nop;
2221 frame->check = slf_check_nop;
2222 }
2223 else if (coro_hv == (HV *)SvRV (coro_current))
2224 {
2225 /* cancelling the current coro is allowed, and equals terminate */
2226 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2227 }
2228 else
2229 {
2230 struct coro *self = SvSTATE_current;
2231
2232 /* otherwise we cancel directly, purely for speed reasons
2233 * unfortunately, this requires some magic trickery, as
2234 * somebody else could cancel us, so we have to fight the cancellation.
2235 * this is ugly, and hopefully fully worth the extra speed.
2236 * besides, I can't get the slow-but-safe version working...
2237 */
2238 slf_frame.data = 0;
2239 self->flags |= CF_NOCANCEL;
2240 coro_state_destroy (aTHX_ coro);
2241 self->flags &= ~CF_NOCANCEL;
2242
2243 if (slf_frame.data)
2244 {
2245 /* while we were busy we have been cancelled, so terminate */
2246 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2247 }
2248 else
2249 {
2250 frame->prepare = prepare_nop;
2251 frame->check = slf_check_nop;
2252 }
2253 }
2254}
2255
2256static int
2257slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2258{
2259 frame->prepare = 0;
2260 coro_unwind_stacks (aTHX);
2261
2262 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
958 2263
959 return 1; 2264 return 1;
960} 2265}
961 2266
962static int 2267static int
963api_is_ready (SV *coro_sv) 2268safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
964{ 2269{
965 return !!SvSTATE (coro_sv)->flags & CF_READY; 2270 if (coro->cctx)
966} 2271 croak ("coro inside C callback, unable to cancel at this time, caught");
967 2272
968static void 2273 if (coro->flags & CF_NEW)
969prepare_schedule (struct transfer_args *ta) 2274 {
970{ 2275 coro_set_status (aTHX_ coro, arg, items);
971 SV *prev, *next; 2276 coro_state_destroy (aTHX_ coro);
972
973 for (;;)
974 { 2277 }
975 LOCK; 2278 else
976 next = coro_deq (PRIO_MIN); 2279 {
977 UNLOCK; 2280 if (!coro->slf_frame.prepare)
2281 croak ("coro outside an SLF function, unable to cancel at this time, caught");
978 2282
979 if (next) 2283 slf_destroy (aTHX_ coro);
980 break; 2284
2285 coro_set_status (aTHX_ coro, arg, items);
2286 coro->slf_frame.prepare = prepare_nop;
2287 coro->slf_frame.check = slf_check_safe_cancel;
2288
2289 api_ready (aTHX_ (SV *)coro->hv);
2290 }
2291
2292 return 1;
2293}
2294
2295/*****************************************************************************/
2296/* async pool handler */
2297
2298static int
2299slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2300{
2301 HV *hv = (HV *)SvRV (coro_current);
2302 struct coro *coro = (struct coro *)frame->data;
2303
2304 if (!coro->invoke_cb)
2305 return 1; /* loop till we have invoke */
2306 else
2307 {
2308 hv_store (hv, "desc", sizeof ("desc") - 1,
2309 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2310
2311 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
981 2312
982 { 2313 {
983 dSP; 2314 dSP;
984 2315 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
985 ENTER;
986 SAVETMPS;
987
988 PUSHMARK (SP);
989 PUTBACK; 2316 PUTBACK;
990 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
991
992 FREETMPS;
993 LEAVE;
994 } 2317 }
2318
2319 SvREFCNT_dec (GvAV (PL_defgv));
2320 GvAV (PL_defgv) = coro->invoke_av;
2321 coro->invoke_av = 0;
2322
2323 return 0;
2324 }
2325}
2326
2327static void
2328slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2329{
2330 HV *hv = (HV *)SvRV (coro_current);
2331 struct coro *coro = SvSTATE_hv ((SV *)hv);
2332
2333 if (ecb_expect_true (coro->saved_deffh))
995 } 2334 {
2335 /* subsequent iteration */
2336 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2337 coro->saved_deffh = 0;
996 2338
2339 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2340 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2341 {
2342 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2343 return;
2344 }
2345 else
2346 {
2347 av_clear (GvAV (PL_defgv));
2348 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2349
2350 coro->prio = 0;
2351
2352 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2353 api_trace (aTHX_ coro_current, 0);
2354
2355 frame->prepare = prepare_schedule;
2356 av_push (av_async_pool, SvREFCNT_inc (hv));
2357 }
2358 }
2359 else
2360 {
2361 /* first iteration, simply fall through */
2362 frame->prepare = prepare_nop;
2363 }
2364
2365 frame->check = slf_check_pool_handler;
2366 frame->data = (void *)coro;
2367}
2368
2369/*****************************************************************************/
2370/* rouse callback */
2371
2372#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2373
2374static void
2375coro_rouse_callback (pTHX_ CV *cv)
2376{
2377 dXSARGS;
2378 SV *data = (SV *)S_GENSUB_ARG;
2379
2380 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2381 {
2382 /* first call, set args */
2383 SV *coro = SvRV (data);
2384 AV *av = newAV ();
2385
2386 SvRV_set (data, (SV *)av);
2387
2388 /* better take a full copy of the arguments */
2389 while (items--)
2390 av_store (av, items, newSVsv (ST (items)));
2391
2392 api_ready (aTHX_ coro);
2393 SvREFCNT_dec (coro);
2394 }
2395
2396 XSRETURN_EMPTY;
2397}
2398
2399static int
2400slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2401{
2402 SV *data = (SV *)frame->data;
2403
2404 if (CORO_THROW)
2405 return 0;
2406
2407 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2408 return 1;
2409
2410 /* now push all results on the stack */
2411 {
2412 dSP;
2413 AV *av = (AV *)SvRV (data);
2414 int i;
2415
2416 EXTEND (SP, AvFILLp (av) + 1);
2417 for (i = 0; i <= AvFILLp (av); ++i)
2418 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2419
2420 /* we have stolen the elements, so set length to zero and free */
2421 AvFILLp (av) = -1;
2422 av_undef (av);
2423
2424 PUTBACK;
2425 }
2426
2427 return 0;
2428}
2429
2430static void
2431slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2432{
2433 SV *cb;
2434
2435 if (items)
2436 cb = arg [0];
2437 else
2438 {
2439 struct coro *coro = SvSTATE_current;
2440
2441 if (!coro->rouse_cb)
2442 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2443
2444 cb = sv_2mortal (coro->rouse_cb);
2445 coro->rouse_cb = 0;
2446 }
2447
2448 if (!SvROK (cb)
2449 || SvTYPE (SvRV (cb)) != SVt_PVCV
2450 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2451 croak ("Coro::rouse_wait called with illegal callback argument,");
2452
2453 {
2454 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2455 SV *data = (SV *)S_GENSUB_ARG;
2456
2457 frame->data = (void *)data;
2458 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2459 frame->check = slf_check_rouse_wait;
2460 }
2461}
2462
2463static SV *
2464coro_new_rouse_cb (pTHX)
2465{
997 prev = SvRV (coro_current); 2466 HV *hv = (HV *)SvRV (coro_current);
998 SvRV_set (coro_current, next); 2467 struct coro *coro = SvSTATE_hv (hv);
2468 SV *data = newRV_inc ((SV *)hv);
2469 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
999 2470
1000 /* free this only after the transfer */ 2471 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1001 LOCK; 2472 SvREFCNT_dec (data); /* magicext increases the refcount */
1002 free_coro_mortal ();
1003 UNLOCK;
1004 coro_mortal = prev;
1005 2473
1006 assert (!SvROK(prev));//D 2474 SvREFCNT_dec (coro->rouse_cb);
1007 assert (!SvROK(next));//D 2475 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1008 2476
1009 ta->prev = SvSTATE (prev); 2477 return cb;
1010 ta->next = SvSTATE (next);
1011
1012 assert (ta->next->flags & CF_READY);
1013 ta->next->flags &= ~CF_READY;
1014} 2478}
1015 2479
2480/*****************************************************************************/
2481/* schedule-like-function opcode (SLF) */
2482
2483static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2484static const CV *slf_cv;
2485static SV **slf_argv;
2486static int slf_argc, slf_arga; /* count, allocated */
2487static I32 slf_ax; /* top of stack, for restore */
2488
2489/* this restores the stack in the case we patched the entersub, to */
2490/* recreate the stack frame as perl will on following calls */
2491/* since entersub cleared the stack */
2492static OP *
2493pp_restore (pTHX)
2494{
2495 int i;
2496 SV **SP = PL_stack_base + slf_ax;
2497
2498 PUSHMARK (SP);
2499
2500 EXTEND (SP, slf_argc + 1);
2501
2502 for (i = 0; i < slf_argc; ++i)
2503 PUSHs (sv_2mortal (slf_argv [i]));
2504
2505 PUSHs ((SV *)CvGV (slf_cv));
2506
2507 RETURNOP (slf_restore.op_first);
2508}
2509
1016static void 2510static void
2511slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2512{
2513 SV **arg = (SV **)slf_frame.data;
2514
2515 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2516}
2517
2518static void
2519slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 if (items != 2)
2522 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2523
2524 frame->prepare = slf_prepare_transfer;
2525 frame->check = slf_check_nop;
2526 frame->data = (void *)arg; /* let's hope it will stay valid */
2527}
2528
2529static void
2530slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 frame->prepare = prepare_schedule;
2533 frame->check = slf_check_nop;
2534}
2535
2536static void
1017prepare_cede (struct transfer_args *ta) 2537slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1018{ 2538{
2539 struct coro *next = (struct coro *)slf_frame.data;
2540
2541 SvREFCNT_inc_NN (next->hv);
2542 prepare_schedule_to (aTHX_ ta, next);
2543}
2544
2545static void
2546slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2547{
2548 if (!items)
2549 croak ("Coro::schedule_to expects a coroutine argument, caught");
2550
2551 frame->data = (void *)SvSTATE (arg [0]);
2552 frame->prepare = slf_prepare_schedule_to;
2553 frame->check = slf_check_nop;
2554}
2555
2556static void
2557slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2558{
1019 api_ready (coro_current); 2559 api_ready (aTHX_ SvRV (coro_current));
1020 2560
1021 prepare_schedule (ta); 2561 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1022} 2562}
1023 2563
1024static void 2564static void
1025api_schedule (void) 2565slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1026{ 2566{
2567 frame->prepare = prepare_cede;
2568 frame->check = slf_check_nop;
2569}
2570
2571static void
2572slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 frame->prepare = prepare_cede_notself;
2575 frame->check = slf_check_nop;
2576}
2577
2578/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2579static void
2580slf_destroy (pTHX_ struct coro *coro)
2581{
2582 /* this callback is reserved for slf functions needing to do cleanup */
2583 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2584 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2585
2586 /*
2587 * The on_destroy above most likely is from an SLF call.
2588 * Since by definition the SLF call will not finish when we destroy
2589 * the coro, we will have to force-finish it here, otherwise
2590 * cleanup functions cannot call SLF functions.
2591 */
2592 coro->slf_frame.prepare = 0;
2593}
2594
2595/*
2596 * these not obviously related functions are all rolled into one
2597 * function to increase chances that they all will call transfer with the same
2598 * stack offset
2599 * SLF stands for "schedule-like-function".
2600 */
2601static OP *
2602pp_slf (pTHX)
2603{
2604 I32 checkmark; /* mark SP to see how many elements check has pushed */
2605
2606 /* set up the slf frame, unless it has already been set-up */
2607 /* the latter happens when a new coro has been started */
2608 /* or when a new cctx was attached to an existing coroutine */
2609 if (ecb_expect_true (!slf_frame.prepare))
2610 {
2611 /* first iteration */
2612 dSP;
2613 SV **arg = PL_stack_base + TOPMARK + 1;
2614 int items = SP - arg; /* args without function object */
2615 SV *gv = *sp;
2616
2617 /* do a quick consistency check on the "function" object, and if it isn't */
2618 /* for us, divert to the real entersub */
2619 if (SvTYPE (gv) != SVt_PVGV
2620 || !GvCV (gv)
2621 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2622 return PL_ppaddr[OP_ENTERSUB](aTHX);
2623
2624 if (!(PL_op->op_flags & OPf_STACKED))
2625 {
2626 /* ampersand-form of call, use @_ instead of stack */
2627 AV *av = GvAV (PL_defgv);
2628 arg = AvARRAY (av);
2629 items = AvFILLp (av) + 1;
2630 }
2631
2632 /* now call the init function, which needs to set up slf_frame */
2633 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2634 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2635
2636 /* pop args */
2637 SP = PL_stack_base + POPMARK;
2638
2639 PUTBACK;
2640 }
2641
2642 /* now that we have a slf_frame, interpret it! */
2643 /* we use a callback system not to make the code needlessly */
2644 /* complicated, but so we can run multiple perl coros from one cctx */
2645
2646 do
2647 {
1027 struct transfer_args ta; 2648 struct coro_transfer_args ta;
1028 2649
1029 prepare_schedule (&ta); 2650 slf_frame.prepare (aTHX_ &ta);
1030 TRANSFER (ta); 2651 TRANSFER (ta, 0);
1031}
1032 2652
2653 checkmark = PL_stack_sp - PL_stack_base;
2654 }
2655 while (slf_frame.check (aTHX_ &slf_frame));
2656
2657 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2658
2659 /* exception handling */
2660 if (ecb_expect_false (CORO_THROW))
2661 {
2662 SV *exception = sv_2mortal (CORO_THROW);
2663
2664 CORO_THROW = 0;
2665 sv_setsv (ERRSV, exception);
2666 croak (0);
2667 }
2668
2669 /* return value handling - mostly like entersub */
2670 /* make sure we put something on the stack in scalar context */
2671 if (GIMME_V == G_SCALAR
2672 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2673 {
2674 dSP;
2675 SV **bot = PL_stack_base + checkmark;
2676
2677 if (sp == bot) /* too few, push undef */
2678 bot [1] = &PL_sv_undef;
2679 else /* too many, take last one */
2680 bot [1] = *sp;
2681
2682 SP = bot + 1;
2683
2684 PUTBACK;
2685 }
2686
2687 return NORMAL;
2688}
2689
2690static void
2691api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2692{
2693 int i;
2694 SV **arg = PL_stack_base + ax;
2695 int items = PL_stack_sp - arg + 1;
2696
2697 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2698
2699 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2700 && PL_op->op_ppaddr != pp_slf)
2701 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2702
2703 CvFLAGS (cv) |= CVf_SLF;
2704 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2705 slf_cv = cv;
2706
2707 /* we patch the op, and then re-run the whole call */
2708 /* we have to put the same argument on the stack for this to work */
2709 /* and this will be done by pp_restore */
2710 slf_restore.op_next = (OP *)&slf_restore;
2711 slf_restore.op_type = OP_CUSTOM;
2712 slf_restore.op_ppaddr = pp_restore;
2713 slf_restore.op_first = PL_op;
2714
2715 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2716
2717 if (PL_op->op_flags & OPf_STACKED)
2718 {
2719 if (items > slf_arga)
2720 {
2721 slf_arga = items;
2722 Safefree (slf_argv);
2723 New (0, slf_argv, slf_arga, SV *);
2724 }
2725
2726 slf_argc = items;
2727
2728 for (i = 0; i < items; ++i)
2729 slf_argv [i] = SvREFCNT_inc (arg [i]);
2730 }
2731 else
2732 slf_argc = 0;
2733
2734 PL_op->op_ppaddr = pp_slf;
2735 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2736
2737 PL_op = (OP *)&slf_restore;
2738}
2739
2740/*****************************************************************************/
2741/* dynamic wind */
2742
2743static void
2744on_enterleave_call (pTHX_ SV *cb)
2745{
2746 dSP;
2747
2748 PUSHSTACK;
2749
2750 PUSHMARK (SP);
2751 PUTBACK;
2752 call_sv (cb, G_VOID | G_DISCARD);
2753 SPAGAIN;
2754
2755 POPSTACK;
2756}
2757
2758static SV *
2759coro_avp_pop_and_free (pTHX_ AV **avp)
2760{
2761 AV *av = *avp;
2762 SV *res = av_pop (av);
2763
2764 if (AvFILLp (av) < 0)
2765 {
2766 *avp = 0;
2767 SvREFCNT_dec (av);
2768 }
2769
2770 return res;
2771}
2772
2773static void
2774coro_pop_on_enter (pTHX_ void *coro)
2775{
2776 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2777 SvREFCNT_dec (cb);
2778}
2779
2780static void
2781coro_pop_on_leave (pTHX_ void *coro)
2782{
2783 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2784 on_enterleave_call (aTHX_ sv_2mortal (cb));
2785}
2786
2787/*****************************************************************************/
2788/* PerlIO::cede */
2789
2790typedef struct
2791{
2792 PerlIOBuf base;
2793 NV next, every;
2794} PerlIOCede;
2795
2796static IV ecb_cold
2797PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2798{
2799 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2800
2801 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2802 self->next = nvtime () + self->every;
2803
2804 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2805}
2806
2807static SV * ecb_cold
2808PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2809{
2810 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2811
2812 return newSVnv (self->every);
2813}
2814
2815static IV
2816PerlIOCede_flush (pTHX_ PerlIO *f)
2817{
2818 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2819 double now = nvtime ();
2820
2821 if (now >= self->next)
2822 {
2823 api_cede (aTHX);
2824 self->next = now + self->every;
2825 }
2826
2827 return PerlIOBuf_flush (aTHX_ f);
2828}
2829
2830static PerlIO_funcs PerlIO_cede =
2831{
2832 sizeof(PerlIO_funcs),
2833 "cede",
2834 sizeof(PerlIOCede),
2835 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2836 PerlIOCede_pushed,
2837 PerlIOBuf_popped,
2838 PerlIOBuf_open,
2839 PerlIOBase_binmode,
2840 PerlIOCede_getarg,
2841 PerlIOBase_fileno,
2842 PerlIOBuf_dup,
2843 PerlIOBuf_read,
2844 PerlIOBuf_unread,
2845 PerlIOBuf_write,
2846 PerlIOBuf_seek,
2847 PerlIOBuf_tell,
2848 PerlIOBuf_close,
2849 PerlIOCede_flush,
2850 PerlIOBuf_fill,
2851 PerlIOBase_eof,
2852 PerlIOBase_error,
2853 PerlIOBase_clearerr,
2854 PerlIOBase_setlinebuf,
2855 PerlIOBuf_get_base,
2856 PerlIOBuf_bufsiz,
2857 PerlIOBuf_get_ptr,
2858 PerlIOBuf_get_cnt,
2859 PerlIOBuf_set_ptrcnt,
2860};
2861
2862/*****************************************************************************/
2863/* Coro::Semaphore & Coro::Signal */
2864
2865static SV *
2866coro_waitarray_new (pTHX_ int count)
2867{
2868 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2869 AV *av = newAV ();
2870 SV **ary;
2871
2872 /* unfortunately, building manually saves memory */
2873 Newx (ary, 2, SV *);
2874 AvALLOC (av) = ary;
2875#if PERL_VERSION_ATLEAST (5,10,0)
2876 AvARRAY (av) = ary;
2877#else
2878 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2879 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2880 SvPVX ((SV *)av) = (char *)ary;
2881#endif
2882 AvMAX (av) = 1;
2883 AvFILLp (av) = 0;
2884 ary [0] = newSViv (count);
2885
2886 return newRV_noinc ((SV *)av);
2887}
2888
2889/* semaphore */
2890
2891static void
2892coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2893{
2894 SV *count_sv = AvARRAY (av)[0];
2895 IV count = SvIVX (count_sv);
2896
2897 count += adjust;
2898 SvIVX (count_sv) = count;
2899
2900 /* now wake up as many waiters as are expected to lock */
2901 while (count > 0 && AvFILLp (av) > 0)
2902 {
2903 SV *cb;
2904
2905 /* swap first two elements so we can shift a waiter */
2906 AvARRAY (av)[0] = AvARRAY (av)[1];
2907 AvARRAY (av)[1] = count_sv;
2908 cb = av_shift (av);
2909
2910 if (SvOBJECT (cb))
2911 {
2912 api_ready (aTHX_ cb);
2913 --count;
2914 }
2915 else if (SvTYPE (cb) == SVt_PVCV)
2916 {
2917 dSP;
2918 PUSHMARK (SP);
2919 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2920 PUTBACK;
2921 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2922 }
2923
2924 SvREFCNT_dec (cb);
2925 }
2926}
2927
2928static void
2929coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2930{
2931 /* call $sem->adjust (0) to possibly wake up some other waiters */
2932 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2933}
2934
1033static void 2935static int
1034api_cede (void) 2936slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1035{ 2937{
1036 struct transfer_args ta; 2938 AV *av = (AV *)frame->data;
2939 SV *count_sv = AvARRAY (av)[0];
2940 SV *coro_hv = SvRV (coro_current);
1037 2941
1038 prepare_cede (&ta); 2942 /* if we are about to throw, don't actually acquire the lock, just throw */
1039 TRANSFER (ta); 2943 if (CORO_THROW)
1040} 2944 return 0;
2945 else if (SvIVX (count_sv) > 0)
2946 {
2947 frame->destroy = 0;
1041 2948
2949 if (acquire)
2950 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2951 else
2952 coro_semaphore_adjust (aTHX_ av, 0);
2953
2954 return 0;
2955 }
2956 else
2957 {
2958 int i;
2959 /* if we were woken up but can't down, we look through the whole */
2960 /* waiters list and only add us if we aren't in there already */
2961 /* this avoids some degenerate memory usage cases */
2962 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
2963 if (AvARRAY (av)[i] == coro_hv)
2964 return 1;
2965
2966 av_push (av, SvREFCNT_inc (coro_hv));
2967 return 1;
2968 }
2969}
2970
2971static int
2972slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2973{
2974 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2975}
2976
2977static int
2978slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2979{
2980 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2981}
2982
2983static void
2984slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2985{
2986 AV *av = (AV *)SvRV (arg [0]);
2987
2988 if (SvIVX (AvARRAY (av)[0]) > 0)
2989 {
2990 frame->data = (void *)av;
2991 frame->prepare = prepare_nop;
2992 }
2993 else
2994 {
2995 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2996
2997 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2998 frame->prepare = prepare_schedule;
2999 /* to avoid race conditions when a woken-up coro gets terminated */
3000 /* we arrange for a temporary on_destroy that calls adjust (0) */
3001 frame->destroy = coro_semaphore_destroy;
3002 }
3003}
3004
3005static void
3006slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3007{
3008 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3009 frame->check = slf_check_semaphore_down;
3010}
3011
3012static void
3013slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3014{
3015 if (items >= 2)
3016 {
3017 /* callback form */
3018 AV *av = (AV *)SvRV (arg [0]);
3019 SV *cb_cv = s_get_cv_croak (arg [1]);
3020
3021 av_push (av, SvREFCNT_inc_NN (cb_cv));
3022
3023 if (SvIVX (AvARRAY (av)[0]) > 0)
3024 coro_semaphore_adjust (aTHX_ av, 0);
3025
3026 frame->prepare = prepare_nop;
3027 frame->check = slf_check_nop;
3028 }
3029 else
3030 {
3031 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3032 frame->check = slf_check_semaphore_wait;
3033 }
3034}
3035
3036/* signal */
3037
3038static void
3039coro_signal_wake (pTHX_ AV *av, int count)
3040{
3041 SvIVX (AvARRAY (av)[0]) = 0;
3042
3043 /* now signal count waiters */
3044 while (count > 0 && AvFILLp (av) > 0)
3045 {
3046 SV *cb;
3047
3048 /* swap first two elements so we can shift a waiter */
3049 cb = AvARRAY (av)[0];
3050 AvARRAY (av)[0] = AvARRAY (av)[1];
3051 AvARRAY (av)[1] = cb;
3052
3053 cb = av_shift (av);
3054
3055 if (SvTYPE (cb) == SVt_PVCV)
3056 {
3057 dSP;
3058 PUSHMARK (SP);
3059 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3060 PUTBACK;
3061 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3062 }
3063 else
3064 {
3065 api_ready (aTHX_ cb);
3066 sv_setiv (cb, 0); /* signal waiter */
3067 }
3068
3069 SvREFCNT_dec (cb);
3070
3071 --count;
3072 }
3073}
3074
3075static int
3076slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3077{
3078 /* if we are about to throw, also stop waiting */
3079 return SvROK ((SV *)frame->data) && !CORO_THROW;
3080}
3081
3082static void
3083slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3084{
3085 AV *av = (AV *)SvRV (arg [0]);
3086
3087 if (items >= 2)
3088 {
3089 SV *cb_cv = s_get_cv_croak (arg [1]);
3090 av_push (av, SvREFCNT_inc_NN (cb_cv));
3091
3092 if (SvIVX (AvARRAY (av)[0]))
3093 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3094
3095 frame->prepare = prepare_nop;
3096 frame->check = slf_check_nop;
3097 }
3098 else if (SvIVX (AvARRAY (av)[0]))
3099 {
3100 SvIVX (AvARRAY (av)[0]) = 0;
3101 frame->prepare = prepare_nop;
3102 frame->check = slf_check_nop;
3103 }
3104 else
3105 {
3106 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3107
3108 av_push (av, waiter);
3109
3110 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3111 frame->prepare = prepare_schedule;
3112 frame->check = slf_check_signal_wait;
3113 }
3114}
3115
3116/*****************************************************************************/
3117/* Coro::AIO */
3118
3119#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3120
3121/* helper storage struct */
3122struct io_state
3123{
3124 int errorno;
3125 I32 laststype; /* U16 in 5.10.0 */
3126 int laststatval;
3127 Stat_t statcache;
3128};
3129
3130static void
3131coro_aio_callback (pTHX_ CV *cv)
3132{
3133 dXSARGS;
3134 AV *state = (AV *)S_GENSUB_ARG;
3135 SV *coro = av_pop (state);
3136 SV *data_sv = newSV (sizeof (struct io_state));
3137
3138 av_extend (state, items - 1);
3139
3140 sv_upgrade (data_sv, SVt_PV);
3141 SvCUR_set (data_sv, sizeof (struct io_state));
3142 SvPOK_only (data_sv);
3143
3144 {
3145 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3146
3147 data->errorno = errno;
3148 data->laststype = PL_laststype;
3149 data->laststatval = PL_laststatval;
3150 data->statcache = PL_statcache;
3151 }
3152
3153 /* now build the result vector out of all the parameters and the data_sv */
3154 {
3155 int i;
3156
3157 for (i = 0; i < items; ++i)
3158 av_push (state, SvREFCNT_inc_NN (ST (i)));
3159 }
3160
3161 av_push (state, data_sv);
3162
3163 api_ready (aTHX_ coro);
3164 SvREFCNT_dec (coro);
3165 SvREFCNT_dec ((AV *)state);
3166}
3167
3168static int
3169slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3170{
3171 AV *state = (AV *)frame->data;
3172
3173 /* if we are about to throw, return early */
3174 /* this does not cancel the aio request, but at least */
3175 /* it quickly returns */
3176 if (CORO_THROW)
3177 return 0;
3178
3179 /* one element that is an RV? repeat! */
3180 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3181 return 1;
3182
3183 /* restore status */
3184 {
3185 SV *data_sv = av_pop (state);
3186 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3187
3188 errno = data->errorno;
3189 PL_laststype = data->laststype;
3190 PL_laststatval = data->laststatval;
3191 PL_statcache = data->statcache;
3192
3193 SvREFCNT_dec (data_sv);
3194 }
3195
3196 /* push result values */
3197 {
3198 dSP;
3199 int i;
3200
3201 EXTEND (SP, AvFILLp (state) + 1);
3202 for (i = 0; i <= AvFILLp (state); ++i)
3203 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3204
3205 PUTBACK;
3206 }
3207
3208 return 0;
3209}
3210
3211static void
3212slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3213{
3214 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3215 SV *coro_hv = SvRV (coro_current);
3216 struct coro *coro = SvSTATE_hv (coro_hv);
3217
3218 /* put our coroutine id on the state arg */
3219 av_push (state, SvREFCNT_inc_NN (coro_hv));
3220
3221 /* first see whether we have a non-zero priority and set it as AIO prio */
3222 if (coro->prio)
3223 {
3224 dSP;
3225
3226 static SV *prio_cv;
3227 static SV *prio_sv;
3228
3229 if (ecb_expect_false (!prio_cv))
3230 {
3231 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3232 prio_sv = newSViv (0);
3233 }
3234
3235 PUSHMARK (SP);
3236 sv_setiv (prio_sv, coro->prio);
3237 XPUSHs (prio_sv);
3238
3239 PUTBACK;
3240 call_sv (prio_cv, G_VOID | G_DISCARD);
3241 }
3242
3243 /* now call the original request */
3244 {
3245 dSP;
3246 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3247 int i;
3248
3249 PUSHMARK (SP);
3250
3251 /* first push all args to the stack */
3252 EXTEND (SP, items + 1);
3253
3254 for (i = 0; i < items; ++i)
3255 PUSHs (arg [i]);
3256
3257 /* now push the callback closure */
3258 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3259
3260 /* now call the AIO function - we assume our request is uncancelable */
3261 PUTBACK;
3262 call_sv ((SV *)req, G_VOID | G_DISCARD);
3263 }
3264
3265 /* now that the request is going, we loop till we have a result */
3266 frame->data = (void *)state;
3267 frame->prepare = prepare_schedule;
3268 frame->check = slf_check_aio_req;
3269}
3270
3271static void
3272coro_aio_req_xs (pTHX_ CV *cv)
3273{
3274 dXSARGS;
3275
3276 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3277
3278 XSRETURN_EMPTY;
3279}
3280
3281/*****************************************************************************/
3282
3283#if CORO_CLONE
3284# include "clone.c"
3285#endif
3286
3287/*****************************************************************************/
3288
3289static SV *
3290coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3291{
3292 SV *coro_sv;
3293 struct coro *coro;
3294 MAGIC *mg;
3295 HV *hv;
3296 SV *cb;
3297 int i;
3298
3299 if (argc > 0)
3300 {
3301 cb = s_get_cv_croak (argv [0]);
3302
3303 if (!is_coro)
3304 {
3305 if (CvISXSUB (cb))
3306 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3307
3308 if (!CvROOT (cb))
3309 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3310 }
3311 }
3312
3313 Newz (0, coro, 1, struct coro);
3314 coro->args = newAV ();
3315 coro->flags = CF_NEW;
3316
3317 if (coro_first) coro_first->prev = coro;
3318 coro->next = coro_first;
3319 coro_first = coro;
3320
3321 coro->hv = hv = newHV ();
3322 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3323 mg->mg_flags |= MGf_DUP;
3324 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3325
3326 if (argc > 0)
3327 {
3328 av_extend (coro->args, argc + is_coro - 1);
3329
3330 if (is_coro)
3331 {
3332 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3333 cb = (SV *)cv_coro_run;
3334 }
3335
3336 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3337
3338 for (i = 1; i < argc; i++)
3339 av_push (coro->args, newSVsv (argv [i]));
3340 }
3341
3342 return coro_sv;
3343}
3344
3345#ifndef __cplusplus
3346ecb_cold XS(boot_Coro__State);
3347#endif
3348
3349#if CORO_JIT
3350
3351static void ecb_noinline ecb_cold
3352pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3353{
3354 dSP;
3355 AV *av = newAV ();
3356
3357 av_store (av, 3, newSVuv (d));
3358 av_store (av, 2, newSVuv (c));
3359 av_store (av, 1, newSVuv (b));
3360 av_store (av, 0, newSVuv (a));
3361
3362 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3363
3364 PUTBACK;
3365}
3366
3367static void ecb_noinline ecb_cold
3368jit_init (pTHX)
3369{
3370 dSP;
3371 SV *load, *save;
3372 char *map_base;
3373 char *load_ptr, *save_ptr;
3374 STRLEN load_len, save_len, map_len;
3375 int count;
3376
3377 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3378
3379 PUSHMARK (SP);
3380 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3381 #include "state.h"
3382 count = call_pv ("Coro::State::_jit", G_ARRAY);
3383 SPAGAIN;
3384
3385 save = POPs; save_ptr = SvPVbyte (save, save_len);
3386 load = POPs; load_ptr = SvPVbyte (load, load_len);
3387
3388 map_len = load_len + save_len + 16;
3389
3390 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3391
3392 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3393
3394 load_perl_slots = (load_save_perl_slots_type)map_base;
3395 memcpy (map_base, load_ptr, load_len);
3396
3397 map_base += (load_len + 15) & ~15;
3398
3399 save_perl_slots = (load_save_perl_slots_type)map_base;
3400 memcpy (map_base, save_ptr, save_len);
3401
3402 /* we are good citizens and try to make the page read-only, so the evil evil */
3403 /* hackers might have it a bit more difficult */
3404 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3405
3406 PUTBACK;
3407 eval_pv ("undef &Coro::State::_jit", 1);
3408}
3409
3410#endif
3411
1042MODULE = Coro::State PACKAGE = Coro::State 3412MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1043 3413
1044PROTOTYPES: DISABLE 3414PROTOTYPES: DISABLE
1045 3415
1046BOOT: 3416BOOT:
1047{ 3417{
1048#ifdef USE_ITHREADS 3418#ifdef USE_ITHREADS
1049 MUTEX_INIT (&coro_mutex); 3419# if CORO_PTHREAD
3420 coro_thx = PERL_GET_CONTEXT;
1050#endif 3421# endif
1051 BOOT_PAGESIZE; 3422#endif
3423 /* perl defines these to check for existance first, but why it doesn't */
3424 /* just create them one at init time is not clear to me, except for */
3425 /* programs trying to delete them, but... */
3426 /* anyway, we declare this as invalid and make sure they are initialised here */
3427 DEFSV;
3428 ERRSV;
3429
3430 cctx_current = cctx_new_empty ();
3431
3432 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3433 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3434
3435 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3436 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3437 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3438
3439 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3440 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3441 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1052 3442
1053 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3443 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1054 3444
3445 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
3446 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1055 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 3447 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1056 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1057 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1058 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1059 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 3448 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1060 3449
1061 main_mainstack = PL_mainstack; 3450 main_mainstack = PL_mainstack;
3451 main_top_env = PL_top_env;
1062 3452
3453 while (main_top_env->je_prev)
3454 main_top_env = main_top_env->je_prev;
3455
3456 {
3457 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3458
3459 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3460 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3461
3462 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3463 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3464 }
3465
1063 coroapi.ver = CORO_API_VERSION; 3466 coroapi.ver = CORO_API_VERSION;
3467 coroapi.rev = CORO_API_REVISION;
3468
1064 coroapi.transfer = api_transfer; 3469 coroapi.transfer = api_transfer;
1065 3470
3471 coroapi.sv_state = SvSTATE_;
3472 coroapi.execute_slf = api_execute_slf;
3473 coroapi.prepare_nop = prepare_nop;
3474 coroapi.prepare_schedule = prepare_schedule;
3475 coroapi.prepare_cede = prepare_cede;
3476 coroapi.prepare_cede_notself = prepare_cede_notself;
3477
3478 time_init (aTHX);
3479
1066 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3480 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3481#if CORO_JIT
3482 PUTBACK;
3483 jit_init (aTHX);
3484 SPAGAIN;
3485#endif
1067} 3486}
1068 3487
1069SV * 3488SV *
1070new (char *klass, ...) 3489new (SV *klass, ...)
3490 ALIAS:
3491 Coro::new = 1
1071 CODE: 3492 CODE:
1072{ 3493 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1073 struct coro *coro;
1074 HV *hv;
1075 int i;
1076
1077 Newz (0, coro, 1, struct coro);
1078 coro->args = newAV ();
1079 coro->save = CORO_SAVE_ALL;
1080 coro->flags = CF_NEW;
1081
1082 hv = newHV ();
1083 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1084 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1085
1086 for (i = 1; i < items; i++)
1087 av_push (coro->args, newSVsv (ST (i)));
1088}
1089 OUTPUT:
1090 RETVAL
1091
1092int
1093save (SV *coro, int new_save = -1)
1094 CODE:
1095 RETVAL = api_save (coro, new_save);
1096 OUTPUT: 3494 OUTPUT:
1097 RETVAL 3495 RETVAL
1098 3496
1099void 3497void
1100_set_stacklevel (...) 3498transfer (...)
1101 ALIAS: 3499 PROTOTYPE: $$
1102 Coro::State::transfer = 1 3500 CODE:
1103 Coro::schedule = 2 3501 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1104 Coro::cede = 3
1105 CODE:
1106{
1107 struct transfer_args ta;
1108 3502
1109 switch (ix) 3503SV *
3504clone (Coro::State coro)
3505 CODE:
3506{
3507#if CORO_CLONE
3508 struct coro *ncoro = coro_clone (aTHX_ coro);
3509 MAGIC *mg;
3510 /* TODO: too much duplication */
3511 ncoro->hv = newHV ();
3512 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3513 mg->mg_flags |= MGf_DUP;
3514 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3515#else
3516 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3517#endif
3518}
3519 OUTPUT:
3520 RETVAL
3521
3522int
3523cctx_stacksize (int new_stacksize = 0)
3524 PROTOTYPE: ;$
3525 CODE:
3526 RETVAL = cctx_stacksize;
3527 if (new_stacksize)
1110 { 3528 {
1111 case 0: 3529 cctx_stacksize = new_stacksize;
1112 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3530 ++cctx_gen;
1113 ta.next = 0;
1114 break;
1115
1116 case 1:
1117 if (items != 2)
1118 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1119
1120 prepare_transfer (&ta, ST (0), ST (1));
1121 break;
1122
1123 case 2:
1124 prepare_schedule (&ta);
1125 break;
1126
1127 case 3:
1128 prepare_cede (&ta);
1129 break;
1130 } 3531 }
3532 OUTPUT:
3533 RETVAL
1131 3534
1132 TRANSFER (ta); 3535int
1133} 3536cctx_max_idle (int max_idle = 0)
1134 3537 PROTOTYPE: ;$
1135void
1136_clone_state_from (SV *dst, SV *src)
1137 CODE: 3538 CODE:
1138{ 3539 RETVAL = cctx_max_idle;
1139 struct coro *coro_src = SvSTATE (src); 3540 if (max_idle > 1)
1140 3541 cctx_max_idle = max_idle;
1141 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3542 OUTPUT:
1142 3543 RETVAL
1143 ++coro_src->refcnt;
1144 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1145}
1146
1147void
1148_exit (code)
1149 int code
1150 PROTOTYPE: $
1151 CODE:
1152 _exit (code);
1153 3544
1154int 3545int
1155cctx_count () 3546cctx_count ()
3547 PROTOTYPE:
1156 CODE: 3548 CODE:
1157 RETVAL = cctx_count; 3549 RETVAL = cctx_count;
1158 OUTPUT: 3550 OUTPUT:
1159 RETVAL 3551 RETVAL
1160 3552
1161int 3553int
1162cctx_idle () 3554cctx_idle ()
3555 PROTOTYPE:
1163 CODE: 3556 CODE:
1164 RETVAL = cctx_idle; 3557 RETVAL = cctx_idle;
1165 OUTPUT: 3558 OUTPUT:
1166 RETVAL 3559 RETVAL
1167 3560
3561void
3562list ()
3563 PROTOTYPE:
3564 PPCODE:
3565{
3566 struct coro *coro;
3567 for (coro = coro_first; coro; coro = coro->next)
3568 if (coro->hv)
3569 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3570}
3571
3572void
3573call (Coro::State coro, SV *coderef)
3574 ALIAS:
3575 eval = 1
3576 CODE:
3577{
3578 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3579 {
3580 struct coro *current = SvSTATE_current;
3581 struct CoroSLF slf_save;
3582
3583 if (current != coro)
3584 {
3585 PUTBACK;
3586 save_perl (aTHX_ current);
3587 load_perl (aTHX_ coro);
3588 /* the coro is most likely in an active SLF call.
3589 * while not strictly required (the code we execute is
3590 * not allowed to call any SLF functions), it's cleaner
3591 * to reinitialise the slf_frame and restore it later.
3592 * This might one day allow us to actually do SLF calls
3593 * from code executed here.
3594 */
3595 slf_save = slf_frame;
3596 slf_frame.prepare = 0;
3597 SPAGAIN;
3598 }
3599
3600 PUSHSTACK;
3601
3602 PUSHMARK (SP);
3603 PUTBACK;
3604
3605 if (ix)
3606 eval_sv (coderef, 0);
3607 else
3608 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3609
3610 POPSTACK;
3611 SPAGAIN;
3612
3613 if (current != coro)
3614 {
3615 PUTBACK;
3616 slf_frame = slf_save;
3617 save_perl (aTHX_ coro);
3618 load_perl (aTHX_ current);
3619 SPAGAIN;
3620 }
3621 }
3622}
3623
3624SV *
3625is_ready (Coro::State coro)
3626 PROTOTYPE: $
3627 ALIAS:
3628 is_ready = CF_READY
3629 is_running = CF_RUNNING
3630 is_new = CF_NEW
3631 is_destroyed = CF_ZOMBIE
3632 is_zombie = CF_ZOMBIE
3633 is_suspended = CF_SUSPENDED
3634 CODE:
3635 RETVAL = boolSV (coro->flags & ix);
3636 OUTPUT:
3637 RETVAL
3638
3639void
3640throw (SV *self, SV *exception = &PL_sv_undef)
3641 PROTOTYPE: $;$
3642 CODE:
3643{
3644 struct coro *coro = SvSTATE (self);
3645 struct coro *current = SvSTATE_current;
3646 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3647 SvREFCNT_dec (*exceptionp);
3648 SvGETMAGIC (exception);
3649 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3650
3651 api_ready (aTHX_ self);
3652}
3653
3654void
3655api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3656 PROTOTYPE: $;$
3657 C_ARGS: aTHX_ coro, flags
3658
3659SV *
3660has_cctx (Coro::State coro)
3661 PROTOTYPE: $
3662 CODE:
3663 /* maybe manage the running flag differently */
3664 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3665 OUTPUT:
3666 RETVAL
3667
3668int
3669is_traced (Coro::State coro)
3670 PROTOTYPE: $
3671 CODE:
3672 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3673 OUTPUT:
3674 RETVAL
3675
3676UV
3677rss (Coro::State coro)
3678 PROTOTYPE: $
3679 ALIAS:
3680 usecount = 1
3681 CODE:
3682 switch (ix)
3683 {
3684 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3685 case 1: RETVAL = coro->usecount; break;
3686 }
3687 OUTPUT:
3688 RETVAL
3689
3690void
3691force_cctx ()
3692 PROTOTYPE:
3693 CODE:
3694 cctx_current->idle_sp = 0;
3695
3696void
3697swap_defsv (Coro::State self)
3698 PROTOTYPE: $
3699 ALIAS:
3700 swap_defav = 1
3701 CODE:
3702 if (!self->slot)
3703 croak ("cannot swap state with coroutine that has no saved state,");
3704 else
3705 {
3706 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3707 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3708
3709 SV *tmp = *src; *src = *dst; *dst = tmp;
3710 }
3711
3712void
3713cancel (Coro::State self)
3714 CODE:
3715 coro_state_destroy (aTHX_ self);
3716
3717SV *
3718enable_times (int enabled = enable_times)
3719 CODE:
3720{
3721 RETVAL = boolSV (enable_times);
3722
3723 if (enabled != enable_times)
3724 {
3725 enable_times = enabled;
3726
3727 coro_times_update ();
3728 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3729 }
3730}
3731 OUTPUT:
3732 RETVAL
3733
3734void
3735times (Coro::State self)
3736 PPCODE:
3737{
3738 struct coro *current = SvSTATE (coro_current);
3739
3740 if (ecb_expect_false (current == self))
3741 {
3742 coro_times_update ();
3743 coro_times_add (SvSTATE (coro_current));
3744 }
3745
3746 EXTEND (SP, 2);
3747 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3748 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3749
3750 if (ecb_expect_false (current == self))
3751 coro_times_sub (SvSTATE (coro_current));
3752}
3753
3754void
3755swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3756 CODE:
3757{
3758 struct coro *current = SvSTATE_current;
3759
3760 if (current == coro)
3761 SWAP_SVS (current);
3762
3763 if (!coro->swap_sv)
3764 coro->swap_sv = newAV ();
3765
3766 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3767 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3768
3769 if (current == coro)
3770 SWAP_SVS (current);
3771}
3772
3773
1168MODULE = Coro::State PACKAGE = Coro 3774MODULE = Coro::State PACKAGE = Coro
1169 3775
1170BOOT: 3776BOOT:
1171{ 3777{
1172 int i; 3778 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3779 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3780 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3781 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3782 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3783 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3784 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3785 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1173 3786
3787 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3788 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3789 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3790 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3791
1174 coro_stash = gv_stashpv ("Coro", TRUE); 3792 coro_stash = gv_stashpv ("Coro", TRUE);
1175 3793
1176 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3794 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1177 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3795 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1178 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3796 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1179 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3797 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1180 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3798 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1181 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3799 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1182
1183 coro_current = get_sv ("Coro::current", FALSE);
1184 SvREADONLY_on (coro_current);
1185
1186 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1187 coro_ready[i] = newAV ();
1188 3800
1189 { 3801 {
1190 SV *sv = perl_get_sv("Coro::API", 1); 3802 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1191 3803
1192 coroapi.schedule = api_schedule; 3804 coroapi.schedule = api_schedule;
1193 coroapi.save = api_save; 3805 coroapi.schedule_to = api_schedule_to;
1194 coroapi.cede = api_cede; 3806 coroapi.cede = api_cede;
3807 coroapi.cede_notself = api_cede_notself;
1195 coroapi.ready = api_ready; 3808 coroapi.ready = api_ready;
1196 coroapi.is_ready = api_is_ready; 3809 coroapi.is_ready = api_is_ready;
1197 coroapi.nready = &coro_nready; 3810 coroapi.nready = coro_nready;
1198 coroapi.current = coro_current; 3811 coroapi.current = coro_current;
1199 3812
1200 GCoroAPI = &coroapi; 3813 /*GCoroAPI = &coroapi;*/
1201 sv_setiv (sv, (IV)&coroapi); 3814 sv_setiv (sv, (IV)&coroapi);
1202 SvREADONLY_on (sv); 3815 SvREADONLY_on (sv);
1203 } 3816 }
1204} 3817}
3818
3819SV *
3820async (...)
3821 PROTOTYPE: &@
3822 CODE:
3823 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3824 api_ready (aTHX_ RETVAL);
3825 OUTPUT:
3826 RETVAL
3827
3828void
3829_destroy (Coro::State coro)
3830 CODE:
3831 /* used by the manager thread */
3832 coro_state_destroy (aTHX_ coro);
3833
3834void
3835on_destroy (Coro::State coro, SV *cb)
3836 CODE:
3837 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
3838
3839void
3840join (...)
3841 CODE:
3842 CORO_EXECUTE_SLF_XS (slf_init_join);
3843
3844void
3845terminate (...)
3846 CODE:
3847 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3848
3849void
3850cancel (...)
3851 CODE:
3852 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3853
3854int
3855safe_cancel (Coro::State self, ...)
3856 C_ARGS: aTHX_ self, &ST (1), items - 1
3857
3858void
3859schedule (...)
3860 CODE:
3861 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3862
3863void
3864schedule_to (...)
3865 CODE:
3866 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3867
3868void
3869cede_to (...)
3870 CODE:
3871 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3872
3873void
3874cede (...)
3875 CODE:
3876 CORO_EXECUTE_SLF_XS (slf_init_cede);
3877
3878void
3879cede_notself (...)
3880 CODE:
3881 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1205 3882
1206void 3883void
1207_set_current (SV *current) 3884_set_current (SV *current)
1208 PROTOTYPE: $ 3885 PROTOTYPE: $
1209 CODE: 3886 CODE:
1210 SvREFCNT_dec (SvRV (coro_current)); 3887 SvREFCNT_dec (SvRV (coro_current));
1211 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3888 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3889
3890void
3891_set_readyhook (SV *hook)
3892 PROTOTYPE: $
3893 CODE:
3894 SvREFCNT_dec (coro_readyhook);
3895 SvGETMAGIC (hook);
3896 if (SvOK (hook))
3897 {
3898 coro_readyhook = newSVsv (hook);
3899 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3900 }
3901 else
3902 {
3903 coro_readyhook = 0;
3904 CORO_READYHOOK = 0;
3905 }
1212 3906
1213int 3907int
1214prio (Coro::State coro, int newprio = 0) 3908prio (Coro::State coro, int newprio = 0)
3909 PROTOTYPE: $;$
1215 ALIAS: 3910 ALIAS:
1216 nice = 1 3911 nice = 1
1217 CODE: 3912 CODE:
1218{ 3913{
1219 RETVAL = coro->prio; 3914 RETVAL = coro->prio;
1220 3915
1221 if (items > 1) 3916 if (items > 1)
1222 { 3917 {
1223 if (ix) 3918 if (ix)
1224 newprio += coro->prio; 3919 newprio = coro->prio - newprio;
1225 3920
1226 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3921 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1227 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3922 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1228 3923
1229 coro->prio = newprio; 3924 coro->prio = newprio;
1230 } 3925 }
1231} 3926}
3927 OUTPUT:
3928 RETVAL
1232 3929
1233SV * 3930SV *
1234ready (SV *self) 3931ready (SV *self)
1235 PROTOTYPE: $ 3932 PROTOTYPE: $
1236 CODE: 3933 CODE:
1237 RETVAL = boolSV (api_ready (self)); 3934 RETVAL = boolSV (api_ready (aTHX_ self));
1238 OUTPUT:
1239 RETVAL
1240
1241SV *
1242is_ready (SV *self)
1243 PROTOTYPE: $
1244 CODE:
1245 RETVAL = boolSV (api_is_ready (self));
1246 OUTPUT: 3935 OUTPUT:
1247 RETVAL 3936 RETVAL
1248 3937
1249int 3938int
1250nready (...) 3939nready (...)
… …
1252 CODE: 3941 CODE:
1253 RETVAL = coro_nready; 3942 RETVAL = coro_nready;
1254 OUTPUT: 3943 OUTPUT:
1255 RETVAL 3944 RETVAL
1256 3945
1257MODULE = Coro::State PACKAGE = Coro::AIO 3946void
3947suspend (Coro::State self)
3948 PROTOTYPE: $
3949 CODE:
3950 self->flags |= CF_SUSPENDED;
3951
3952void
3953resume (Coro::State self)
3954 PROTOTYPE: $
3955 CODE:
3956 self->flags &= ~CF_SUSPENDED;
3957
3958void
3959_pool_handler (...)
3960 CODE:
3961 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3962
3963void
3964async_pool (SV *cv, ...)
3965 PROTOTYPE: &@
3966 PPCODE:
3967{
3968 HV *hv = (HV *)av_pop (av_async_pool);
3969 AV *av = newAV ();
3970 SV *cb = ST (0);
3971 int i;
3972
3973 av_extend (av, items - 2);
3974 for (i = 1; i < items; ++i)
3975 av_push (av, SvREFCNT_inc_NN (ST (i)));
3976
3977 if ((SV *)hv == &PL_sv_undef)
3978 {
3979 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3980 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3981 SvREFCNT_dec (sv);
3982 }
3983
3984 {
3985 struct coro *coro = SvSTATE_hv (hv);
3986
3987 assert (!coro->invoke_cb);
3988 assert (!coro->invoke_av);
3989 coro->invoke_cb = SvREFCNT_inc (cb);
3990 coro->invoke_av = av;
3991 }
3992
3993 api_ready (aTHX_ (SV *)hv);
3994
3995 if (GIMME_V != G_VOID)
3996 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3997 else
3998 SvREFCNT_dec (hv);
3999}
1258 4000
1259SV * 4001SV *
1260_get_state () 4002rouse_cb ()
4003 PROTOTYPE:
1261 CODE: 4004 CODE:
1262{ 4005 RETVAL = coro_new_rouse_cb (aTHX);
1263 struct io_state *data;
1264
1265 RETVAL = newSV (sizeof (struct io_state));
1266 data = (struct io_state *)SvPVX (RETVAL);
1267 SvCUR_set (RETVAL, sizeof (struct io_state));
1268 SvPOK_only (RETVAL);
1269
1270 data->errorno = errno;
1271 data->laststype = PL_laststype;
1272 data->laststatval = PL_laststatval;
1273 data->statcache = PL_statcache;
1274}
1275 OUTPUT: 4006 OUTPUT:
1276 RETVAL 4007 RETVAL
1277 4008
1278void 4009void
1279_set_state (char *data_) 4010rouse_wait (...)
4011 PROTOTYPE: ;$
4012 PPCODE:
4013 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4014
4015void
4016on_enter (SV *block)
4017 ALIAS:
4018 on_leave = 1
1280 PROTOTYPE: $ 4019 PROTOTYPE: &
1281 CODE: 4020 CODE:
1282{ 4021{
1283 struct io_state *data = (void *)data_; 4022 struct coro *coro = SvSTATE_current;
4023 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1284 4024
1285 errno = data->errorno; 4025 block = s_get_cv_croak (block);
1286 PL_laststype = data->laststype;
1287 PL_laststatval = data->laststatval;
1288 PL_statcache = data->statcache;
1289}
1290 4026
4027 if (!*avp)
4028 *avp = newAV ();
4029
4030 av_push (*avp, SvREFCNT_inc (block));
4031
4032 if (!ix)
4033 on_enterleave_call (aTHX_ block);
4034
4035 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4036 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4037 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4038}
4039
4040
4041MODULE = Coro::State PACKAGE = PerlIO::cede
4042
4043BOOT:
4044 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4045
4046
4047MODULE = Coro::State PACKAGE = Coro::Semaphore
4048
4049SV *
4050new (SV *klass, SV *count = 0)
4051 CODE:
4052{
4053 int semcnt = 1;
4054
4055 if (count)
4056 {
4057 SvGETMAGIC (count);
4058
4059 if (SvOK (count))
4060 semcnt = SvIV (count);
4061 }
4062
4063 RETVAL = sv_bless (
4064 coro_waitarray_new (aTHX_ semcnt),
4065 GvSTASH (CvGV (cv))
4066 );
4067}
4068 OUTPUT:
4069 RETVAL
4070
4071# helper for Coro::Channel and others
4072SV *
4073_alloc (int count)
4074 CODE:
4075 RETVAL = coro_waitarray_new (aTHX_ count);
4076 OUTPUT:
4077 RETVAL
4078
4079SV *
4080count (SV *self)
4081 CODE:
4082 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087up (SV *self, int adjust = 1)
4088 ALIAS:
4089 adjust = 1
4090 CODE:
4091 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4092
4093void
4094down (...)
4095 CODE:
4096 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4097
4098void
4099wait (...)
4100 CODE:
4101 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4102
4103void
4104try (SV *self)
4105 PPCODE:
4106{
4107 AV *av = (AV *)SvRV (self);
4108 SV *count_sv = AvARRAY (av)[0];
4109 IV count = SvIVX (count_sv);
4110
4111 if (count > 0)
4112 {
4113 --count;
4114 SvIVX (count_sv) = count;
4115 XSRETURN_YES;
4116 }
4117 else
4118 XSRETURN_NO;
4119}
4120
4121void
4122waiters (SV *self)
4123 PPCODE:
4124{
4125 AV *av = (AV *)SvRV (self);
4126 int wcount = AvFILLp (av) + 1 - 1;
4127
4128 if (GIMME_V == G_SCALAR)
4129 XPUSHs (sv_2mortal (newSViv (wcount)));
4130 else
4131 {
4132 int i;
4133 EXTEND (SP, wcount);
4134 for (i = 1; i <= wcount; ++i)
4135 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4136 }
4137}
4138
4139MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4140
4141void
4142_may_delete (SV *sem, int count, unsigned int extra_refs)
4143 PPCODE:
4144{
4145 AV *av = (AV *)SvRV (sem);
4146
4147 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4148 && AvFILLp (av) == 0 /* no waiters, just count */
4149 && SvIV (AvARRAY (av)[0]) == count)
4150 XSRETURN_YES;
4151
4152 XSRETURN_NO;
4153}
4154
4155MODULE = Coro::State PACKAGE = Coro::Signal
4156
4157SV *
4158new (SV *klass)
4159 CODE:
4160 RETVAL = sv_bless (
4161 coro_waitarray_new (aTHX_ 0),
4162 GvSTASH (CvGV (cv))
4163 );
4164 OUTPUT:
4165 RETVAL
4166
4167void
4168wait (...)
4169 CODE:
4170 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4171
4172void
4173broadcast (SV *self)
4174 CODE:
4175{
4176 AV *av = (AV *)SvRV (self);
4177 coro_signal_wake (aTHX_ av, AvFILLp (av));
4178}
4179
4180void
4181send (SV *self)
4182 CODE:
4183{
4184 AV *av = (AV *)SvRV (self);
4185
4186 if (AvFILLp (av))
4187 coro_signal_wake (aTHX_ av, 1);
4188 else
4189 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4190}
4191
4192IV
4193awaited (SV *self)
4194 CODE:
4195 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4196 OUTPUT:
4197 RETVAL
4198
4199
4200MODULE = Coro::State PACKAGE = Coro::AnyEvent
4201
4202BOOT:
4203 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4204
4205void
4206_schedule (...)
4207 CODE:
4208{
4209 static int incede;
4210
4211 api_cede_notself (aTHX);
4212
4213 ++incede;
4214 while (coro_nready >= incede && api_cede (aTHX))
4215 ;
4216
4217 sv_setsv (sv_activity, &PL_sv_undef);
4218 if (coro_nready >= incede)
4219 {
4220 PUSHMARK (SP);
4221 PUTBACK;
4222 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4223 }
4224
4225 --incede;
4226}
4227
4228
4229MODULE = Coro::State PACKAGE = Coro::AIO
4230
4231void
4232_register (char *target, char *proto, SV *req)
4233 CODE:
4234{
4235 SV *req_cv = s_get_cv_croak (req);
4236 /* newXSproto doesn't return the CV on 5.8 */
4237 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4238 sv_setpv ((SV *)slf_cv, proto);
4239 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4240}
4241
4242MODULE = Coro::State PACKAGE = Coro::Select
4243
4244void
4245patch_pp_sselect ()
4246 CODE:
4247 if (!coro_old_pp_sselect)
4248 {
4249 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4250 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4251 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4252 }
4253
4254void
4255unpatch_pp_sselect ()
4256 CODE:
4257 if (coro_old_pp_sselect)
4258 {
4259 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4260 coro_old_pp_sselect = 0;
4261 }
4262
4263MODULE = Coro::State PACKAGE = Coro::Util
4264
4265void
4266_exit (int code)
4267 CODE:
4268 _exit (code);
4269
4270NV
4271time ()
4272 CODE:
4273 RETVAL = nvtime (aTHX);
4274 OUTPUT:
4275 RETVAL
4276
4277NV
4278gettimeofday ()
4279 PPCODE:
4280{
4281 UV tv [2];
4282 u2time (aTHX_ tv);
4283 EXTEND (SP, 2);
4284 PUSHs (sv_2mortal (newSVuv (tv [0])));
4285 PUSHs (sv_2mortal (newSVuv (tv [1])));
4286}
4287

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