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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.41 by root, Tue Nov 27 02:51:03 2001 UTC vs.
Revision 1.428 by root, Wed Dec 5 16:34:12 2012 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
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
6 17
18#define ECB_NO_THREADS 1
19#include "ecb.h"
20
21#include <stddef.h>
7#include <signal.h> 22#include <stdio.h>
23#include <errno.h>
24#include <assert.h>
8 25
26#ifndef SVs_PADSTALE
27# define SVs_PADSTALE 0
28#endif
29
30#ifdef PadARRAY
31# define NEWPADAPI
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;
38# endif
39# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
40# define PadlistMAX(pl) AvFILLp (pl)
41# define PadlistNAMES(pl) (*PadlistARRAY (pl))
42# define PadARRAY AvARRAY
43# define PadMAX AvFILLp
44# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
45#endif
46
47#if defined(_WIN32)
48# undef HAS_GETTIMEOFDAY
49# undef setjmp
50# undef longjmp
51# undef _exit
52# define setjmp _setjmp /* deep magic */
53#else
54# include <inttypes.h> /* most portable stdint.h */
55#endif
56
9#ifdef HAVE_MMAP 57#if HAVE_MMAP
10# include <unistd.h> 58# include <unistd.h>
11# include <sys/mman.h> 59# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 60# ifndef MAP_ANONYMOUS
13# ifdef MAP_ANON 61# ifdef MAP_ANON
14# define MAP_ANONYMOUS MAP_ANON 62# define MAP_ANONYMOUS MAP_ANON
15# else 63# else
16# undef HAVE_MMAP 64# undef HAVE_MMAP
17# endif 65# endif
18# endif 66# endif
67# include <limits.h>
68# ifndef PAGESIZE
69# define PAGESIZE pagesize
70# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
71static long pagesize;
72# else
73# define BOOT_PAGESIZE (void)0
19#endif 74# endif
75#else
76# define PAGESIZE 0
77# define BOOT_PAGESIZE (void)0
78#endif
20 79
21#define MAY_FLUSH /* increases codesize and is rarely used */ 80#if CORO_USE_VALGRIND
81# include <valgrind/valgrind.h>
82#endif
22 83
23#define SUB_INIT "Coro::State::initialize" 84/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 85static int cctx_max_idle = 4;
25 86
26/* The next macro should declare a variable stacklevel that contains and approximation 87#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
27 * to the current C stack pointer. Its property is that it changes with each call 88# define HAS_SCOPESTACK_NAME 1
28 * and should be unique. */ 89#endif
90
91#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
92# undef CORO_STACKGUARD
93#endif
94
95#ifndef CORO_STACKGUARD
96# define CORO_STACKGUARD 0
97#endif
98
99/* prefer perl internal functions over our own? */
100#ifndef CORO_PREFER_PERL_FUNCTIONS
101# define CORO_PREFER_PERL_FUNCTIONS 0
102#endif
103
104/* The next macros try to return the current stack pointer, in an as
105 * portable way as possible. */
106#if __GNUC__ >= 4
107# define dSTACKLEVEL int stacklevel_dummy
108# define STACKLEVEL __builtin_frame_address (0)
109#else
110# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 111# define STACKLEVEL ((void *)&stacklevel)
112#endif
30 113
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 114#define IN_DESTRUCT PL_dirty
32
33#define labs(l) ((l) >= 0 ? (l) : -(l))
34 115
35#include "CoroAPI.h" 116#include "CoroAPI.h"
117#define GCoroAPI (&coroapi) /* very sneaky */
36 118
119#ifdef USE_ITHREADS
120# if CORO_PTHREAD
121static void *coro_thx;
122# endif
123#endif
124
125#ifdef __linux
126# include <time.h> /* for timespec */
127# include <syscall.h> /* for SYS_* */
128# ifdef SYS_clock_gettime
129# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
130# define CORO_CLOCK_MONOTONIC 1
131# define CORO_CLOCK_THREAD_CPUTIME_ID 3
132# endif
133#endif
134
135static double (*nvtime)(); /* so why doesn't it take void? */
136static void (*u2time)(pTHX_ UV ret[2]);
137
138/* we hijack an hopefully unused CV flag for our purposes */
139#define CVf_SLF 0x4000
140static OP *pp_slf (pTHX);
141static void slf_destroy (pTHX_ struct coro *coro);
142
143static U32 cctx_gen;
144static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 145static struct CoroAPI coroapi;
146static AV *main_mainstack; /* used to differentiate between $main and others */
147static JMPENV *main_top_env;
148static HV *coro_state_stash, *coro_stash;
149static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 150
39/* this is actually not only the c stack but also c registers etc... */ 151static AV *av_destroy; /* destruction queue */
152static SV *sv_manager; /* the manager coro */
153static SV *sv_idle; /* $Coro::idle */
154
155static GV *irsgv; /* $/ */
156static GV *stdoutgv; /* *STDOUT */
157static SV *rv_diehook;
158static SV *rv_warnhook;
159static HV *hv_sig; /* %SIG */
160
161/* async_pool helper stuff */
162static SV *sv_pool_rss;
163static SV *sv_pool_size;
164static SV *sv_async_pool_idle; /* description string */
165static AV *av_async_pool; /* idle pool */
166static SV *sv_Coro; /* class string */
167static CV *cv_pool_handler;
168
169/* Coro::AnyEvent */
170static SV *sv_activity;
171
172/* enable processtime/realtime profiling */
173static char enable_times;
174typedef U32 coro_ts[2];
175static coro_ts time_real, time_cpu;
176static char times_valid;
177
178static struct coro_cctx *cctx_first;
179static int cctx_count, cctx_idle;
180
181enum
182{
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
40typedef struct { 192typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 193{
42 int usecnt; /* shared by how many coroutines */ 194 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 195
196 /* the stack */
197 void *sptr;
198 size_t ssize;
199
200 /* cpu state */
201 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
202#ifndef NDEBUG
203 JMPENV *idle_te; /* same as idle_sp, but for top_env */
204#endif
205 JMPENV *top_env;
45 coro_context cctx; 206 coro_context cctx;
46 207
47 void *sptr; 208 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 209#if CORO_USE_VALGRIND
49} coro_stack; 210 int valgrind_id;
211#endif
212 unsigned char flags;
213} coro_cctx;
50 214
215static coro_cctx *cctx_current; /* the currently running cctx */
216
217/*****************************************************************************/
218
219static MGVTBL coro_state_vtbl;
220
221enum
222{
223 CF_RUNNING = 0x0001, /* coroutine is running */
224 CF_READY = 0x0002, /* coroutine is ready */
225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
227 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
228 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
229};
230
231/* the structure where most of the perl state is stored, overlaid on the cxstack */
232typedef struct
233{
234 #define VARx(name,expr,type) type name;
235 #include "state.h"
236} perl_slots;
237
238/* how many context stack entries do we need for perl_slots */
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
51struct coro { 242struct coro
52 /* the optional C context */ 243{
53 coro_stack *stack; 244 /* the C coroutine allocated to this perl coroutine, if any */
54 void *cursp; 245 coro_cctx *cctx;
55 int gencnt;
56 246
57 /* optionally saved, might be zero */ 247 /* ready queue */
58 AV *defav; 248 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 249
66 /* the stacks and related info (callchain etc..) */ 250 /* state data */
67 PERL_SI *curstackinfo; 251 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 252 AV *mainstack;
70 SV **stack_sp; 253 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 254
255 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 256 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 257 int flags; /* CF_ flags */
258 HV *hv; /* the perl hash associated with this coro, if any */
259
260 /* statistics */
261 int usecount; /* number of transfers to this coro */
262
263 /* coro process data */
264 int prio;
265 SV *except; /* exception to be thrown */
266 SV *rouse_cb; /* last rouse callback */
267 AV *on_destroy; /* callbacks or coros to notify on destroy */
268 AV *status; /* the exit status list */
269
270 /* async_pool */
271 SV *saved_deffh;
272 SV *invoke_cb;
273 AV *invoke_av;
274
275 /* on_enter/on_leave */
276 AV *on_enter;
277 AV *on_leave;
278
279 /* swap_sv */
280 AV *swap_sv;
281
282 /* times */
283 coro_ts t_cpu, t_real;
284
285 /* linked list */
286 struct coro *next, *prev;
96}; 287};
97 288
98typedef struct coro *Coro__State; 289typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 290typedef struct coro *Coro__State_or_hashref;
100 291
101static AV *main_mainstack; /* used to differentiate between $main and others */ 292/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 293/* and get copied between struct coro and these variables */
294/* the main reason we don't support windows process emulation */
295static struct CoroSLF slf_frame; /* the current slf frame */
296
297/** Coro ********************************************************************/
298
299#define CORO_PRIO_MAX 3
300#define CORO_PRIO_HIGH 1
301#define CORO_PRIO_NORMAL 0
302#define CORO_PRIO_LOW -1
303#define CORO_PRIO_IDLE -3
304#define CORO_PRIO_MIN -4
305
306/* for Coro.pm */
307static SV *coro_current;
308static SV *coro_readyhook;
309static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
310static CV *cv_coro_run;
311static struct coro *coro_first;
312#define coro_nready coroapi.nready
313
314/** JIT *********************************************************************/
315
316#if CORO_JIT
317 /* APPLE doesn't have HAVE_MMAP though */
318 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
319 #ifndef CORO_JIT_TYPE
320 #if __x86_64 && CORO_JIT_UNIXY
321 #define CORO_JIT_TYPE "amd64-unix"
322 #elif __i386 && CORO_JIT_UNIXY
323 #define CORO_JIT_TYPE "x86-unix"
324 #endif
325 #endif
326#endif
327
328#if !defined(CORO_JIT_TYPE) || !HAVE_MMAP
329 #undef CORO_JIT
330#endif
331
332#if CORO_JIT
333 typedef void (*load_save_perl_slots_type)(perl_slots *);
334 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
335#endif
336
337/** Coro::Select ************************************************************/
338
339static OP *(*coro_old_pp_sselect) (pTHX);
103static SV *ucoro_state_sv; 340static SV *coro_select_select;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106static SV *coro_mortal; /* will be freed after next transfer */
107 341
108/* mostly copied from op.c:cv_clone2 */ 342/* horrible hack, but if it works... */
109STATIC AV * 343static OP *
110clone_padlist (AV *protopadlist) 344coro_pp_sselect (pTHX)
111{ 345{
112 AV *av; 346 dSP;
113 I32 ix; 347 PUSHMARK (SP - 4); /* fake argument list */
114 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 348 XPUSHs (coro_select_select);
115 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 349 PUTBACK;
116 SV **pname = AvARRAY (protopad_name); 350
117 SV **ppad = AvARRAY (protopad); 351 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
118 I32 fname = AvFILLp (protopad_name); 352 PL_op->op_flags |= OPf_STACKED;
119 I32 fpad = AvFILLp (protopad); 353 PL_op->op_private = 0;
120 AV *newpadlist, *newpad_name, *newpad; 354 return PL_ppaddr [OP_ENTERSUB](aTHX);
355}
356
357/** time stuff **************************************************************/
358
359#ifdef HAS_GETTIMEOFDAY
360
361ecb_inline void
362coro_u2time (pTHX_ UV ret[2])
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 ret [0] = tv.tv_sec;
368 ret [1] = tv.tv_usec;
369}
370
371ecb_inline double
372coro_nvtime (void)
373{
374 struct timeval tv;
375 gettimeofday (&tv, 0);
376
377 return tv.tv_sec + tv.tv_usec * 1e-6;
378}
379
380ecb_inline void
381time_init (pTHX)
382{
383 nvtime = coro_nvtime;
384 u2time = coro_u2time;
385}
386
387#else
388
389ecb_inline void
390time_init (pTHX)
391{
121 SV **npad; 392 SV **svp;
122 393
123 newpad_name = newAV (); 394 require_pv ("Time/HiRes.pm");
124 for (ix = fname; ix >= 0; ix--)
125 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126 395
127 newpad = newAV (); 396 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
128 av_fill (newpad, AvFILLp (protopad));
129 npad = AvARRAY (newpad);
130 397
131 newpadlist = newAV (); 398 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
399 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
400
401 nvtime = INT2PTR (double (*)(), SvIV (*svp));
402
403 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
404 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
405}
406
407#endif
408
409/** lowlevel stuff **********************************************************/
410
411static SV * ecb_noinline
412coro_get_sv (pTHX_ const char *name, int create)
413{
414#if PERL_VERSION_ATLEAST (5,10,0)
415 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
416 get_sv (name, create);
417#endif
418 return get_sv (name, create);
419}
420
421static AV * ecb_noinline
422coro_get_av (pTHX_ const char *name, int create)
423{
424#if PERL_VERSION_ATLEAST (5,10,0)
425 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
426 get_av (name, create);
427#endif
428 return get_av (name, create);
429}
430
431static HV * ecb_noinline
432coro_get_hv (pTHX_ const char *name, int create)
433{
434#if PERL_VERSION_ATLEAST (5,10,0)
435 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
436 get_hv (name, create);
437#endif
438 return get_hv (name, create);
439}
440
441ecb_inline void
442coro_times_update (void)
443{
444#ifdef coro_clock_gettime
445 struct timespec ts;
446
447 ts.tv_sec = ts.tv_nsec = 0;
448 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
449 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
450
451 ts.tv_sec = ts.tv_nsec = 0;
452 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
453 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
454#else
455 dTHX;
456 UV tv[2];
457
458 u2time (aTHX_ tv);
459 time_real [0] = tv [0];
460 time_real [1] = tv [1] * 1000;
461#endif
462}
463
464ecb_inline void
465coro_times_add (struct coro *c)
466{
467 c->t_real [1] += time_real [1];
468 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
469 c->t_real [0] += time_real [0];
470
471 c->t_cpu [1] += time_cpu [1];
472 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
473 c->t_cpu [0] += time_cpu [0];
474}
475
476ecb_inline void
477coro_times_sub (struct coro *c)
478{
479 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
480 c->t_real [1] -= time_real [1];
481 c->t_real [0] -= time_real [0];
482
483 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
484 c->t_cpu [1] -= time_cpu [1];
485 c->t_cpu [0] -= time_cpu [0];
486}
487
488/*****************************************************************************/
489/* magic glue */
490
491#define CORO_MAGIC_type_cv 26
492#define CORO_MAGIC_type_state PERL_MAGIC_ext
493
494#define CORO_MAGIC_NN(sv, type) \
495 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
496 ? SvMAGIC (sv) \
497 : mg_find (sv, type))
498
499#define CORO_MAGIC(sv, type) \
500 (ecb_expect_true (SvMAGIC (sv)) \
501 ? CORO_MAGIC_NN (sv, type) \
502 : 0)
503
504#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
505#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
506
507ecb_inline MAGIC *
508SvSTATEhv_p (pTHX_ SV *coro)
509{
510 MAGIC *mg;
511
512 if (ecb_expect_true (
513 SvTYPE (coro) == SVt_PVHV
514 && (mg = CORO_MAGIC_state (coro))
515 && mg->mg_virtual == &coro_state_vtbl
516 ))
517 return mg;
518
519 return 0;
520}
521
522ecb_inline struct coro *
523SvSTATE_ (pTHX_ SV *coro)
524{
525 MAGIC *mg;
526
527 if (SvROK (coro))
528 coro = SvRV (coro);
529
530 mg = SvSTATEhv_p (aTHX_ coro);
531 if (!mg)
532 croak ("Coro::State object required");
533
534 return (struct coro *)mg->mg_ptr;
535}
536
537#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
538
539/* faster than SvSTATE, but expects a coroutine hv */
540#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
541#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
542
543/*****************************************************************************/
544/* padlist management and caching */
545
546ecb_inline PADLIST *
547coro_derive_padlist (pTHX_ CV *cv)
548{
549 PADLIST *padlist = CvPADLIST (cv);
550 PADLIST *newpadlist;
551 PAD *newpad;
552 PADOFFSET const off = PadlistMAX (padlist) + 1;
553
554 newPADLIST(newpadlist);
555#if !PERL_VERSION_ATLEAST(5,15,3)
556 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
132 AvREAL_off (newpadlist); 557 AvREAL_off (newpadlist);
133 av_store (newpadlist, 0, (SV *) newpad_name); 558#endif
134 av_store (newpadlist, 1, (SV *) newpad); 559#if PERL_VERSION_ATLEAST (5,10,0)
560 Perl_pad_push (aTHX_ padlist, off);
561#else
562 Perl_pad_push (aTHX_ padlist, off, 1);
563#endif
564 newpad = PadlistARRAY (padlist)[off];
565 PadlistMAX (padlist) = off - 1;
135 566
136 av = newAV (); /* will be @_ */ 567 /* Already extended to 2 elements by newPADLIST. */
137 av_extend (av, 0); 568 PadlistMAX (newpadlist) = 1;
138 av_store (newpad, 0, (SV *) av); 569 PadlistNAMES (newpadlist) = (PADNAMELIST *)SvREFCNT_inc_NN (PadlistNAMES (padlist));
139 AvFLAGS (av) = AVf_REIFY; 570 PadlistARRAY (newpadlist)[1] = newpad;
140 571
141 for (ix = fpad; ix > 0; ix--) 572 return newpadlist;
573}
574
575ecb_inline void
576free_padlist (pTHX_ PADLIST *padlist)
577{
578 /* may be during global destruction */
579 if (!IN_DESTRUCT)
142 { 580 {
143 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 581 I32 i = PadlistMAX (padlist);
144 if (namesv && namesv != &PL_sv_undef) 582
583 while (i > 0) /* special-case index 0 */
145 { 584 {
146 char *name = SvPVX (namesv); /* XXX */ 585 /* we try to be extra-careful here */
147 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 586 PAD *pad = PadlistARRAY (padlist)[i--];
148 { /* lexical from outside? */ 587 I32 j = PadMAX (pad);
149 npad[ix] = SvREFCNT_inc (ppad[ix]); 588
150 } 589 while (j >= 0)
151 else 590 SvREFCNT_dec (PadARRAY (pad)[j--]);
152 { /* our own lexical */ 591
153 SV *sv; 592 PadMAX (pad) = -1;
154 if (*name == '&') 593 SvREFCNT_dec (pad);
155 sv = SvREFCNT_inc (ppad[ix]);
156 else if (*name == '@')
157 sv = (SV *) newAV ();
158 else if (*name == '%')
159 sv = (SV *) newHV ();
160 else
161 sv = NEWSV (0, 0);
162 if (!SvPADBUSY (sv))
163 SvPADMY_on (sv);
164 npad[ix] = sv;
165 }
166 } 594 }
167 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
168 {
169 npad[ix] = SvREFCNT_inc (ppad[ix]);
170 }
171 else
172 {
173 SV *sv = NEWSV (0, 0);
174 SvPADTMP_on (sv);
175 npad[ix] = sv;
176 }
177 }
178 595
179#if 0 /* return -ENOTUNDERSTOOD */ 596 SvREFCNT_dec (PadlistNAMES (padlist));
180 /* Now that vars are all in place, clone nested closures. */
181 597
182 for (ix = fpad; ix > 0; ix--) { 598#ifdef NEWPADAPI
183 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 599 Safefree (PadlistARRAY (padlist));
184 if (namesv 600 Safefree (padlist);
185 && namesv != &PL_sv_undef 601#else
186 && !(SvFLAGS(namesv) & SVf_FAKE)
187 && *SvPVX(namesv) == '&'
188 && CvCLONE(ppad[ix]))
189 {
190 CV *kid = cv_clone((CV*)ppad[ix]);
191 SvREFCNT_dec(ppad[ix]);
192 CvCLONE_on(kid);
193 SvPADMY_on(kid);
194 npad[ix] = (SV*)kid;
195 }
196 }
197#endif
198
199 return newpadlist;
200}
201
202#ifdef MAY_FLUSH
203STATIC void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT(padlist))
208 {
209 I32 i = AvFILLp(padlist); 602 AvFILLp (padlist) = -1;
210 while (i >= 0) 603 AvREAL_off (padlist);
211 {
212 SV **svp = av_fetch(padlist, i--, FALSE);
213 SV *sv = svp ? *svp : Nullsv;
214 if (sv)
215 SvREFCNT_dec(sv);
216 }
217
218 SvREFCNT_dec((SV*)padlist); 604 SvREFCNT_dec ((SV*)padlist);
605#endif
606 }
607}
608
609static int
610coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
611{
612 PADLIST *padlist;
613 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
614 size_t len = *(size_t *)mg->mg_ptr;
615
616 /* perl manages to free our internal AV and _then_ call us */
617 if (IN_DESTRUCT)
618 return 0;
619
620 while (len--)
621 free_padlist (aTHX_ padlists[len]);
622
623 return 0;
624}
625
626static MGVTBL coro_cv_vtbl = {
627 0, 0, 0, 0,
628 coro_cv_free
629};
630
631/* the next two functions merely cache the padlists */
632ecb_inline void
633get_padlist (pTHX_ CV *cv)
634{
635 MAGIC *mg = CORO_MAGIC_cv (cv);
636 size_t *lenp;
637
638 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
639 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
640 else
641 {
642#if CORO_PREFER_PERL_FUNCTIONS
643 /* this is probably cleaner? but also slower! */
644 /* in practise, it seems to be less stable */
645 CV *cp = Perl_cv_clone (aTHX_ cv);
646 CvPADLIST (cv) = CvPADLIST (cp);
647 CvPADLIST (cp) = 0;
648 SvREFCNT_dec (cp);
649#else
650 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
651#endif
652 }
653}
654
655ecb_inline void
656put_padlist (pTHX_ CV *cv)
657{
658 MAGIC *mg = CORO_MAGIC_cv (cv);
659
660 if (ecb_expect_false (!mg))
661 {
662 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
663 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
664 mg->mg_len = 1; /* so mg_free frees mg_ptr */
665 }
666 else
667 Renew (mg->mg_ptr,
668 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
669 char);
670
671 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
672}
673
674/** load & save, init *******************************************************/
675
676ecb_inline void
677swap_sv (SV *a, SV *b)
678{
679 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
680 SV tmp;
681
682 /* swap sv_any */
683 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
684
685 /* swap sv_flags */
686 SvFLAGS (&tmp) = SvFLAGS (a);
687 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
688 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
689
690#if PERL_VERSION_ATLEAST (5,10,0)
691 /* perl 5.10 and later complicates this _quite_ a bit, but it also
692 * is much faster, so no quarrels here. alternatively, we could
693 * sv_upgrade to avoid this.
694 */
695 {
696 /* swap sv_u */
697 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
698
699 /* if SvANY points to the head, we need to adjust the pointers,
700 * as the pointer for a still points to b, and maybe vice versa.
701 */
702 #define svany_in_head(type) \
703 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
704
705 if (svany_in_head (SvTYPE (a)))
706 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
707
708 if (svany_in_head (SvTYPE (b)))
709 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
219 } 710 }
220}
221#endif 711#endif
222
223/* the next two functions merely cache the padlists */
224STATIC void
225get_padlist (CV *cv)
226{
227 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229 if (he && AvFILLp ((AV *)*he) >= 0)
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231 else
232 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233} 712}
234 713
235STATIC void 714/* swap sv heads, at least logically */
236put_padlist (CV *cv)
237{
238 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240 if (SvTYPE (*he) != SVt_PVAV)
241 {
242 SvREFCNT_dec (*he);
243 *he = (SV *)newAV ();
244 }
245
246 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
247}
248
249#ifdef MAY_FLUSH
250STATIC void
251flush_padlist_cache ()
252{
253 HV *hv = padlist_cache;
254 padlist_cache = newHV ();
255
256 if (hv_iterinit (hv))
257 {
258 HE *he;
259 AV *padlist;
260
261 while (!!(he = hv_iternext (hv)))
262 {
263 AV *av = (AV *)HeVAL(he);
264
265 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (padlist);
268 }
269 }
270
271 SvREFCNT_dec (hv);
272}
273#endif
274
275#define SB do {
276#define SE } while (0)
277
278#define LOAD(state) load_state(aTHX_ (state));
279#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283static void 715static void
716swap_svs (pTHX_ Coro__State c)
717{
718 int i;
719
720 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
721 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
722}
723
724#define SWAP_SVS(coro) \
725 if (ecb_expect_false ((coro)->swap_sv)) \
726 swap_svs (aTHX_ (coro))
727
728static void
729on_enterleave_call (pTHX_ SV *cb);
730
731static void
284load_state(pTHX_ Coro__State c) 732load_perl (pTHX_ Coro__State c)
285{ 733{
286 PL_dowarn = c->dowarn; 734 perl_slots *slot = c->slot;
287 PL_in_eval = c->in_eval; 735 c->slot = 0;
288 736
289 PL_curstackinfo = c->curstackinfo;
290 PL_curstack = c->curstack;
291 PL_mainstack = c->mainstack; 737 PL_mainstack = c->mainstack;
292 PL_stack_sp = c->stack_sp;
293 PL_op = c->op;
294 PL_curpad = c->curpad;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310 PL_retstack = c->retstack;
311 PL_retstack_ix = c->retstack_ix;
312 PL_retstack_max = c->retstack_max;
313 PL_curcop = c->curcop;
314 PL_top_env = c->top_env;
315 738
316 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 739#if CORO_JIT
317 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 740 load_perl_slots (slot);
318 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 741#else
742 #define VARx(name,expr,type) expr = slot->name;
743 #include "state.h"
744#endif
319 745
320 { 746 {
321 dSP; 747 dSP;
748
322 CV *cv; 749 CV *cv;
323 750
324 /* now do the ugly restore mess */ 751 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 752 while (ecb_expect_true (cv = (CV *)POPs))
326 { 753 {
327 AV *padlist = (AV *)POPs;
328
329 if (padlist)
330 {
331 put_padlist (cv); /* mark this padlist as available */ 754 put_padlist (aTHX_ cv); /* mark this padlist as available */
332 CvPADLIST(cv) = padlist; 755 CvDEPTH (cv) = PTR2IV (POPs);
333#ifdef USE_THREADS 756 CvPADLIST (cv) = (PADLIST *)POPs;
334 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335#endif
336 }
337
338 ++CvDEPTH(cv);
339 } 757 }
340 758
341 PUTBACK; 759 PUTBACK;
342 } 760 }
343}
344 761
762 slf_frame = c->slf_frame;
763 CORO_THROW = c->except;
764
765 if (ecb_expect_false (enable_times))
766 {
767 if (ecb_expect_false (!times_valid))
768 coro_times_update ();
769
770 coro_times_sub (c);
771 }
772
773 if (ecb_expect_false (c->on_enter))
774 {
775 int i;
776
777 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
778 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
779 }
780
781 SWAP_SVS (c);
782}
783
345static void 784static void
346save_state(pTHX_ Coro__State c, int flags) 785save_perl (pTHX_ Coro__State c)
347{ 786{
787 SWAP_SVS (c);
788
789 if (ecb_expect_false (c->on_leave))
790 {
791 int i;
792
793 for (i = AvFILLp (c->on_leave); i >= 0; --i)
794 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
795 }
796
797 times_valid = 0;
798
799 if (ecb_expect_false (enable_times))
800 {
801 coro_times_update (); times_valid = 1;
802 coro_times_add (c);
803 }
804
805 c->except = CORO_THROW;
806 c->slf_frame = slf_frame;
807
348 { 808 {
349 dSP; 809 dSP;
350 I32 cxix = cxstack_ix; 810 I32 cxix = cxstack_ix;
351 PERL_CONTEXT *ccstk = cxstack; 811 PERL_CONTEXT *ccstk = cxstack;
352 PERL_SI *top_si = PL_curstackinfo; 812 PERL_SI *top_si = PL_curstackinfo;
… …
354 /* 814 /*
355 * the worst thing you can imagine happens first - we have to save 815 * the worst thing you can imagine happens first - we have to save
356 * (and reinitialize) all cv's in the whole callchain :( 816 * (and reinitialize) all cv's in the whole callchain :(
357 */ 817 */
358 818
359 PUSHs (Nullsv); 819 XPUSHs (Nullsv);
360 /* this loop was inspired by pp_caller */ 820 /* this loop was inspired by pp_caller */
361 for (;;) 821 for (;;)
362 { 822 {
363 while (cxix >= 0) 823 while (ecb_expect_true (cxix >= 0))
364 { 824 {
365 PERL_CONTEXT *cx = &ccstk[cxix--]; 825 PERL_CONTEXT *cx = &ccstk[cxix--];
366 826
367 if (CxTYPE(cx) == CXt_SUB) 827 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
368 { 828 {
369 CV *cv = cx->blk_sub.cv; 829 CV *cv = cx->blk_sub.cv;
830
370 if (CvDEPTH(cv)) 831 if (ecb_expect_true (CvDEPTH (cv)))
371 { 832 {
372#ifdef USE_THREADS
373 /*XPUSHs ((SV *)CvOWNER(cv));*/
374 /*CvOWNER(cv) = 0;*/
375 /*error must unlock this cv etc.. etc...*/
376#endif
377 EXTEND (SP, CvDEPTH(cv)*2); 833 EXTEND (SP, 3);
378
379 while (--CvDEPTH(cv))
380 {
381 /* this tells the restore code to increment CvDEPTH */
382 PUSHs (Nullsv);
383 PUSHs ((SV *)cv);
384 }
385
386 PUSHs ((SV *)CvPADLIST(cv)); 834 PUSHs ((SV *)CvPADLIST (cv));
835 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
387 PUSHs ((SV *)cv); 836 PUSHs ((SV *)cv);
388 837
389 get_padlist (cv); /* this is a monster */ 838 CvDEPTH (cv) = 0;
839 get_padlist (aTHX_ cv);
390 } 840 }
391 } 841 }
392 else if (CxTYPE(cx) == CXt_FORMAT)
393 {
394 /* I never used formats, so how should I know how these are implemented? */
395 /* my bold guess is as a simple, plain sub... */
396 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397 }
398 } 842 }
399 843
400 if (top_si->si_type == PERLSI_MAIN) 844 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
401 break; 845 break;
402 846
403 top_si = top_si->si_prev; 847 top_si = top_si->si_prev;
404 ccstk = top_si->si_cxstack; 848 ccstk = top_si->si_cxstack;
405 cxix = top_si->si_cxix; 849 cxix = top_si->si_cxix;
406 } 850 }
407 851
408 PUTBACK; 852 PUTBACK;
409 } 853 }
410 854
411 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 855 /* allocate some space on the context stack for our purposes */
412 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 856 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
413 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 857 {
858 unsigned int i;
414 859
415 c->dowarn = PL_dowarn; 860 for (i = 0; i < SLOT_COUNT; ++i)
416 c->in_eval = PL_in_eval; 861 CXINC;
417 862
418 c->curstackinfo = PL_curstackinfo; 863 cxstack_ix -= SLOT_COUNT; /* undo allocation */
419 c->curstack = PL_curstack; 864 }
865
420 c->mainstack = PL_mainstack; 866 c->mainstack = PL_mainstack;
421 c->stack_sp = PL_stack_sp; 867
422 c->op = PL_op; 868 {
423 c->curpad = PL_curpad; 869 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
424 c->stack_base = PL_stack_base; 870
425 c->stack_max = PL_stack_max; 871#if CORO_JIT
426 c->tmps_stack = PL_tmps_stack; 872 save_perl_slots (slot);
427 c->tmps_floor = PL_tmps_floor; 873#else
428 c->tmps_ix = PL_tmps_ix; 874 #define VARx(name,expr,type) slot->name = expr;
429 c->tmps_max = PL_tmps_max; 875 #include "state.h"
430 c->markstack = PL_markstack; 876#endif
431 c->markstack_ptr = PL_markstack_ptr; 877 }
432 c->markstack_max = PL_markstack_max;
433 c->scopestack = PL_scopestack;
434 c->scopestack_ix = PL_scopestack_ix;
435 c->scopestack_max = PL_scopestack_max;
436 c->savestack = PL_savestack;
437 c->savestack_ix = PL_savestack_ix;
438 c->savestack_max = PL_savestack_max;
439 c->retstack = PL_retstack;
440 c->retstack_ix = PL_retstack_ix;
441 c->retstack_max = PL_retstack_max;
442 c->curcop = PL_curcop;
443 c->top_env = PL_top_env;
444} 878}
445 879
446/* 880/*
447 * allocate various perl stacks. This is an exact copy 881 * allocate various perl stacks. This is almost an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 882 * of perl.c:init_stacks, except that it uses less memory
449 * on the assumption that coroutines do not usually need 883 * on the (sometimes correct) assumption that coroutines do
450 * a lot of stackspace. 884 * not usually need a lot of stackspace.
451 */ 885 */
452STATIC void 886#if CORO_PREFER_PERL_FUNCTIONS
887# define coro_init_stacks(thx) init_stacks ()
888#else
889static void
453coro_init_stacks (pTHX) 890coro_init_stacks (pTHX)
454{ 891{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 892 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
456 PL_curstackinfo->si_type = PERLSI_MAIN; 893 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 894 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 895 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 896
460 PL_stack_base = AvARRAY(PL_curstack); 897 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 898 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 899 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 900
464 New(50,PL_tmps_stack,96,SV*); 901 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 902 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 903 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 904 PL_tmps_max = 32;
468 905
469 New(54,PL_markstack,16,I32); 906 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 907 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 908 PL_markstack_max = PL_markstack + 16;
472 909
910#ifdef SET_MARK_OFFSET
473 SET_MARK_OFFSET; 911 SET_MARK_OFFSET;
912#endif
474 913
475 New(54,PL_scopestack,16,I32); 914 New(54,PL_scopestack,8,I32);
476 PL_scopestack_ix = 0; 915 PL_scopestack_ix = 0;
477 PL_scopestack_max = 16; 916 PL_scopestack_max = 8;
917#if HAS_SCOPESTACK_NAME
918 New(54,PL_scopestack_name,8,const char*);
919#endif
478 920
479 New(54,PL_savestack,96,ANY); 921 New(54,PL_savestack,24,ANY);
480 PL_savestack_ix = 0; 922 PL_savestack_ix = 0;
481 PL_savestack_max = 96; 923 PL_savestack_max = 24;
482 924
925#if !PERL_VERSION_ATLEAST (5,10,0)
483 New(54,PL_retstack,8,OP*); 926 New(54,PL_retstack,4,OP*);
484 PL_retstack_ix = 0; 927 PL_retstack_ix = 0;
485 PL_retstack_max = 8; 928 PL_retstack_max = 4;
929#endif
486} 930}
931#endif
487 932
488/* 933/*
489 * destroy the stacks, the callchain etc... 934 * destroy the stacks, the callchain etc...
490 * still there is a memleak of 128 bytes...
491 */ 935 */
492STATIC void 936static void
493destroy_stacks(pTHX) 937coro_destruct_stacks (pTHX)
494{ 938{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 while (PL_scopestack_ix)
499 LEAVE;
500
501 /* sure it is, but more important: is it correct?? :/ */
502 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503 FREETMPS;
504 }
505
506 while (PL_curstackinfo->si_next) 939 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 940 PL_curstackinfo = PL_curstackinfo->si_next;
508 941
509 while (PL_curstackinfo) 942 while (PL_curstackinfo)
510 { 943 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 944 PERL_SI *p = PL_curstackinfo->si_prev;
512 945
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 946 if (!IN_DESTRUCT)
520 {
521 dounwind(-1);
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 947 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 948
525 Safefree(PL_curstackinfo->si_cxstack); 949 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree(PL_curstackinfo); 950 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 951 PL_curstackinfo = p;
528 } 952 }
529 953
530 Safefree(PL_tmps_stack); 954 Safefree (PL_tmps_stack);
531 Safefree(PL_markstack); 955 Safefree (PL_markstack);
532 Safefree(PL_scopestack); 956 Safefree (PL_scopestack);
957#if HAS_SCOPESTACK_NAME
958 Safefree (PL_scopestack_name);
959#endif
533 Safefree(PL_savestack); 960 Safefree (PL_savestack);
961#if !PERL_VERSION_ATLEAST (5,10,0)
534 Safefree(PL_retstack); 962 Safefree (PL_retstack);
535}
536
537static void
538allocate_stack (Coro__State ctx, int alloc)
539{
540 coro_stack *stack;
541
542 New (0, stack, 1, coro_stack);
543
544 stack->refcnt = 1;
545 stack->usecnt = 1;
546 stack->gencnt = ctx->gencnt = 0;
547 if (alloc)
548 {
549#if HAVE_MMAP
550 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552 if (stack->sptr == (void *)-1)
553#endif 963#endif
964}
965
966#define CORO_RSS \
967 rss += sizeof (SYM (curstackinfo)); \
968 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
969 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
970 rss += SYM (tmps_max) * sizeof (SV *); \
971 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
972 rss += SYM (scopestack_max) * sizeof (I32); \
973 rss += SYM (savestack_max) * sizeof (ANY);
974
975static size_t
976coro_rss (pTHX_ struct coro *coro)
977{
978 size_t rss = sizeof (*coro);
979
980 if (coro->mainstack)
981 {
982 if (coro->flags & CF_RUNNING)
554 { 983 {
555 /*FIXME*//*D*//* reasonable stack size! */ 984 #define SYM(sym) PL_ ## sym
556 stack->ssize = -4096 * sizeof (long); 985 CORO_RSS;
557 New (0, stack->sptr, 4096, long); 986 #undef SYM
558 } 987 }
559 }
560 else 988 else
561 stack->sptr = 0;
562
563 ctx->stack = stack;
564}
565
566static void
567deallocate_stack (Coro__State ctx)
568{
569 coro_stack *stack = ctx->stack;
570
571 ctx->stack = 0;
572
573 if (stack)
574 {
575 if (!--stack->refcnt)
576 { 989 {
577#ifdef HAVE_MMAP 990 #define SYM(sym) coro->slot->sym
578 if (stack->ssize > 0 && stack->sptr) 991 CORO_RSS;
579 munmap (stack->sptr, stack->ssize); 992 #undef SYM
993 }
994 }
995
996 return rss;
997}
998
999/** coroutine stack handling ************************************************/
1000
1001static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1002static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1003static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1004
1005/* apparently < 5.8.8 */
1006#ifndef MgPV_nolen_const
1007#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1008 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1009 (const char*)(mg)->mg_ptr)
1010#endif
1011
1012/*
1013 * This overrides the default magic get method of %SIG elements.
1014 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1015 * and instead of trying to save and restore the hash elements (extremely slow),
1016 * we just provide our own readback here.
1017 */
1018static int ecb_cold
1019coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1020{
1021 const char *s = MgPV_nolen_const (mg);
1022
1023 if (*s == '_')
1024 {
1025 SV **svp = 0;
1026
1027 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1028 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1029
1030 if (svp)
1031 {
1032 SV *ssv;
1033
1034 if (!*svp)
1035 ssv = &PL_sv_undef;
1036 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1037 ssv = sv_2mortal (newRV_inc (*svp));
580 else 1038 else
581#else 1039 ssv = *svp;
582 Safefree (stack->sptr); 1040
583#endif 1041 sv_setsv (sv, ssv);
584 Safefree (stack); 1042 return 0;
585 } 1043 }
586 else if (ctx->gencnt == stack->gencnt) 1044 }
587 --stack->usecnt; 1045
1046 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1047}
1048
1049static int ecb_cold
1050coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1051{
1052 const char *s = MgPV_nolen_const (mg);
1053
1054 if (*s == '_')
588 } 1055 {
589} 1056 SV **svp = 0;
590 1057
1058 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1059 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1060
1061 if (svp)
1062 {
1063 SV *old = *svp;
1064 *svp = 0;
1065 SvREFCNT_dec (old);
1066 return 0;
1067 }
1068 }
1069
1070 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1071}
1072
1073static int ecb_cold
1074coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1075{
1076 const char *s = MgPV_nolen_const (mg);
1077
1078 if (*s == '_')
1079 {
1080 SV **svp = 0;
1081
1082 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1083 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1084
1085 if (svp)
1086 {
1087 SV *old = *svp;
1088 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1089 SvREFCNT_dec (old);
1090 return 0;
1091 }
1092 }
1093
1094 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1095}
1096
1097static void
1098prepare_nop (pTHX_ struct coro_transfer_args *ta)
1099{
1100 /* kind of mega-hacky, but works */
1101 ta->next = ta->prev = (struct coro *)ta;
1102}
1103
591static void 1104static int
592setup_coro (void *arg) 1105slf_check_nop (pTHX_ struct CoroSLF *frame)
1106{
1107 return 0;
1108}
1109
1110static int
1111slf_check_repeat (pTHX_ struct CoroSLF *frame)
1112{
1113 return 1;
1114}
1115
1116static UNOP init_perl_op;
1117
1118ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1119init_perl (pTHX_ struct coro *coro)
593{ 1120{
594 /* 1121 /*
595 * emulate part of the perl startup here. 1122 * emulate part of the perl startup here.
596 */ 1123 */
1124 coro_init_stacks (aTHX);
1125
1126 PL_runops = RUNOPS_DEFAULT;
1127 PL_curcop = &PL_compiling;
1128 PL_in_eval = EVAL_NULL;
1129 PL_comppad = 0;
1130 PL_comppad_name = 0;
1131 PL_comppad_name_fill = 0;
1132 PL_comppad_name_floor = 0;
1133 PL_curpm = 0;
1134 PL_curpad = 0;
1135 PL_localizing = 0;
1136 PL_restartop = 0;
1137#if PERL_VERSION_ATLEAST (5,10,0)
1138 PL_parser = 0;
1139#endif
1140 PL_hints = 0;
1141
1142 /* recreate the die/warn hooks */
1143 PL_diehook = SvREFCNT_inc (rv_diehook);
1144 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1145
1146 GvSV (PL_defgv) = newSV (0);
1147 GvAV (PL_defgv) = coro->args; coro->args = 0;
1148 GvSV (PL_errgv) = newSV (0);
1149 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1150 GvHV (PL_hintgv) = 0;
1151 PL_rs = newSVsv (GvSV (irsgv));
1152 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1153
1154 {
1155 dSP;
1156 UNOP myop;
1157
1158 Zero (&myop, 1, UNOP);
1159 myop.op_next = Nullop;
1160 myop.op_type = OP_ENTERSUB;
1161 myop.op_flags = OPf_WANT_VOID;
1162
1163 PUSHMARK (SP);
1164 PUSHs ((SV *)coro->startcv);
1165 PUTBACK;
1166 PL_op = (OP *)&myop;
1167 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1168 }
1169
1170 /* this newly created coroutine might be run on an existing cctx which most
1171 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1172 */
1173 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1174 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1175 slf_frame.destroy = 0;
1176
1177 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1178 init_perl_op.op_next = PL_op;
1179 init_perl_op.op_type = OP_ENTERSUB;
1180 init_perl_op.op_ppaddr = pp_slf;
1181 /* no flags etc. required, as an init function won't be called */
1182
1183 PL_op = (OP *)&init_perl_op;
1184
1185 /* copy throw, in case it was set before init_perl */
1186 CORO_THROW = coro->except;
1187
1188 SWAP_SVS (coro);
1189
1190 if (ecb_expect_false (enable_times))
1191 {
1192 coro_times_update ();
1193 coro_times_sub (coro);
1194 }
1195}
1196
1197static void
1198coro_unwind_stacks (pTHX)
1199{
1200 if (!IN_DESTRUCT)
1201 {
1202 /* restore all saved variables and stuff */
1203 LEAVE_SCOPE (0);
1204 assert (PL_tmps_floor == -1);
1205
1206 /* free all temporaries */
1207 FREETMPS;
1208 assert (PL_tmps_ix == -1);
1209
1210 /* unwind all extra stacks */
1211 POPSTACK_TO (PL_mainstack);
1212
1213 /* unwind main stack */
1214 dounwind (-1);
1215 }
1216}
1217
1218static void
1219destroy_perl (pTHX_ struct coro *coro)
1220{
1221 SV *svf [9];
1222
1223 {
1224 SV *old_current = SvRV (coro_current);
1225 struct coro *current = SvSTATE (old_current);
1226
1227 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1228
1229 save_perl (aTHX_ current);
1230
1231 /* this will cause transfer_check to croak on block*/
1232 SvRV_set (coro_current, (SV *)coro->hv);
1233
1234 load_perl (aTHX_ coro);
1235
1236 coro_unwind_stacks (aTHX);
1237
1238 /* restore swapped sv's */
1239 SWAP_SVS (coro);
1240
1241 coro_destruct_stacks (aTHX);
1242
1243 /* now save some sv's to be free'd later */
1244 svf [0] = GvSV (PL_defgv);
1245 svf [1] = (SV *)GvAV (PL_defgv);
1246 svf [2] = GvSV (PL_errgv);
1247 svf [3] = (SV *)PL_defoutgv;
1248 svf [4] = PL_rs;
1249 svf [5] = GvSV (irsgv);
1250 svf [6] = (SV *)GvHV (PL_hintgv);
1251 svf [7] = PL_diehook;
1252 svf [8] = PL_warnhook;
1253 assert (9 == sizeof (svf) / sizeof (*svf));
1254
1255 SvRV_set (coro_current, old_current);
1256
1257 load_perl (aTHX_ current);
1258 }
1259
1260 {
1261 unsigned int i;
1262
1263 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1264 SvREFCNT_dec (svf [i]);
1265
1266 SvREFCNT_dec (coro->saved_deffh);
1267 SvREFCNT_dec (coro->rouse_cb);
1268 SvREFCNT_dec (coro->invoke_cb);
1269 SvREFCNT_dec (coro->invoke_av);
1270 }
1271}
1272
1273ecb_inline void
1274free_coro_mortal (pTHX)
1275{
1276 if (ecb_expect_true (coro_mortal))
1277 {
1278 SvREFCNT_dec ((SV *)coro_mortal);
1279 coro_mortal = 0;
1280 }
1281}
1282
1283static int
1284runops_trace (pTHX)
1285{
1286 COP *oldcop = 0;
1287 int oldcxix = -2;
1288
1289 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1290 {
1291 PERL_ASYNC_CHECK ();
1292
1293 if (cctx_current->flags & CC_TRACE_ALL)
1294 {
1295 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1296 {
1297 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1298 SV **bot, **top;
1299 AV *av = newAV (); /* return values */
1300 SV **cb;
1301 dSP;
1302
1303 GV *gv = CvGV (cx->blk_sub.cv);
1304 SV *fullname = sv_2mortal (newSV (0));
1305 if (isGV (gv))
1306 gv_efullname3 (fullname, gv, 0);
1307
1308 bot = PL_stack_base + cx->blk_oldsp + 1;
1309 top = cx->blk_gimme == G_ARRAY ? SP + 1
1310 : cx->blk_gimme == G_SCALAR ? bot + 1
1311 : bot;
1312
1313 av_extend (av, top - bot);
1314 while (bot < top)
1315 av_push (av, SvREFCNT_inc_NN (*bot++));
1316
1317 PL_runops = RUNOPS_DEFAULT;
1318 ENTER;
1319 SAVETMPS;
1320 EXTEND (SP, 3);
1321 PUSHMARK (SP);
1322 PUSHs (&PL_sv_no);
1323 PUSHs (fullname);
1324 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1325 PUTBACK;
1326 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1327 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1328 SPAGAIN;
1329 FREETMPS;
1330 LEAVE;
1331 PL_runops = runops_trace;
1332 }
1333
1334 if (oldcop != PL_curcop)
1335 {
1336 oldcop = PL_curcop;
1337
1338 if (PL_curcop != &PL_compiling)
1339 {
1340 SV **cb;
1341
1342 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1343 {
1344 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1345
1346 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1347 {
1348 dSP;
1349 GV *gv = CvGV (cx->blk_sub.cv);
1350 SV *fullname = sv_2mortal (newSV (0));
1351
1352 if (isGV (gv))
1353 gv_efullname3 (fullname, gv, 0);
1354
1355 PL_runops = RUNOPS_DEFAULT;
1356 ENTER;
1357 SAVETMPS;
1358 EXTEND (SP, 3);
1359 PUSHMARK (SP);
1360 PUSHs (&PL_sv_yes);
1361 PUSHs (fullname);
1362 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1363 PUTBACK;
1364 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1365 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1366 SPAGAIN;
1367 FREETMPS;
1368 LEAVE;
1369 PL_runops = runops_trace;
1370 }
1371
1372 oldcxix = cxstack_ix;
1373 }
1374
1375 if (cctx_current->flags & CC_TRACE_LINE)
1376 {
1377 dSP;
1378
1379 PL_runops = RUNOPS_DEFAULT;
1380 ENTER;
1381 SAVETMPS;
1382 EXTEND (SP, 3);
1383 PL_runops = RUNOPS_DEFAULT;
1384 PUSHMARK (SP);
1385 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1386 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1387 PUTBACK;
1388 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1389 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1390 SPAGAIN;
1391 FREETMPS;
1392 LEAVE;
1393 PL_runops = runops_trace;
1394 }
1395 }
1396 }
1397 }
1398 }
1399
1400 TAINT_NOT;
1401 return 0;
1402}
1403
1404static struct CoroSLF cctx_ssl_frame;
1405
1406static void
1407slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1408{
1409 ta->prev = 0;
1410}
1411
1412static int
1413slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1414{
1415 *frame = cctx_ssl_frame;
1416
1417 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1418}
1419
1420/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1421static void ecb_noinline
1422cctx_prepare (pTHX)
1423{
1424 PL_top_env = &PL_start_env;
1425
1426 if (cctx_current->flags & CC_TRACE)
1427 PL_runops = runops_trace;
1428
1429 /* we already must be executing an SLF op, there is no other valid way
1430 * that can lead to creation of a new cctx */
1431 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1432 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1433
1434 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1435 cctx_ssl_frame = slf_frame;
1436
1437 slf_frame.prepare = slf_prepare_set_stacklevel;
1438 slf_frame.check = slf_check_set_stacklevel;
1439}
1440
1441/* the tail of transfer: execute stuff we can only do after a transfer */
1442ecb_inline void
1443transfer_tail (pTHX)
1444{
1445 free_coro_mortal (aTHX);
1446}
1447
1448/* try to exit the same way perl's main function would do */
1449/* we do not bother resetting the environment or other things *7
1450/* that are not, uhm, essential */
1451/* this obviously also doesn't work when perl is embedded */
1452static void ecb_noinline ecb_cold
1453perlish_exit (pTHX)
1454{
1455 int exitstatus = perl_destruct (PL_curinterp);
1456 perl_free (PL_curinterp);
1457 exit (exitstatus);
1458}
1459
1460/*
1461 * this is a _very_ stripped down perl interpreter ;)
1462 */
1463static void
1464cctx_run (void *arg)
1465{
1466#ifdef USE_ITHREADS
1467# if CORO_PTHREAD
1468 PERL_SET_CONTEXT (coro_thx);
1469# endif
1470#endif
1471 {
1472 dTHX;
1473
1474 /* normally we would need to skip the entersub here */
1475 /* not doing so will re-execute it, which is exactly what we want */
1476 /* PL_nop = PL_nop->op_next */
1477
1478 /* inject a fake subroutine call to cctx_init */
1479 cctx_prepare (aTHX);
1480
1481 /* cctx_run is the alternative tail of transfer() */
1482 transfer_tail (aTHX);
1483
1484 /* somebody or something will hit me for both perl_run and PL_restartop */
1485 PL_restartop = PL_op;
1486 perl_run (PL_curinterp);
1487 /*
1488 * Unfortunately, there is no way to get at the return values of the
1489 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1490 * runtime errors here, as this is just a random interpreter, not a thread.
1491 */
1492
1493 /*
1494 * If perl-run returns we assume exit() was being called or the coro
1495 * fell off the end, which seems to be the only valid (non-bug)
1496 * reason for perl_run to return. We try to mimic whatever perl is normally
1497 * doing in that case. YMMV.
1498 */
1499 perlish_exit (aTHX);
1500 }
1501}
1502
1503static coro_cctx *
1504cctx_new (void)
1505{
1506 coro_cctx *cctx;
1507
1508 ++cctx_count;
1509 New (0, cctx, 1, coro_cctx);
1510
1511 cctx->gen = cctx_gen;
1512 cctx->flags = 0;
1513 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1514
1515 return cctx;
1516}
1517
1518/* create a new cctx only suitable as source */
1519static coro_cctx *
1520cctx_new_empty (void)
1521{
1522 coro_cctx *cctx = cctx_new ();
1523
1524 cctx->sptr = 0;
1525 coro_create (&cctx->cctx, 0, 0, 0, 0);
1526
1527 return cctx;
1528}
1529
1530/* create a new cctx suitable as destination/running a perl interpreter */
1531static coro_cctx *
1532cctx_new_run (void)
1533{
1534 coro_cctx *cctx = cctx_new ();
1535 void *stack_start;
1536 size_t stack_size;
1537
1538#if CORO_FIBER
1539
1540 cctx->ssize = cctx_stacksize * sizeof (long);
1541 cctx->sptr = 0;
1542
1543#else
1544
1545 #if HAVE_MMAP
1546 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1547 /* mmap supposedly does allocate-on-write for us */
1548 cctx->sptr = mmap (0, cctx->ssize, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANONYMOUS, -1, 0);
1549
1550 if (cctx->sptr != (void *)-1)
1551 {
1552 #if CORO_STACKGUARD
1553 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1554 #endif
1555 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1556 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1557 cctx->flags |= CC_MAPPED;
1558 }
1559 else
1560 #endif
1561 {
1562 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1563 New (0, cctx->sptr, cctx_stacksize, long);
1564
1565 if (!cctx->sptr)
1566 {
1567 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1568 _exit (EXIT_FAILURE);
1569 }
1570
1571 stack_start = cctx->sptr;
1572 stack_size = cctx->ssize;
1573 }
1574 #endif
1575
1576 #if CORO_USE_VALGRIND
1577 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1578 #endif
1579
1580 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1581
1582 return cctx;
1583}
1584
1585static void
1586cctx_destroy (coro_cctx *cctx)
1587{
1588 if (!cctx)
1589 return;
1590
1591 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1592
1593 --cctx_count;
1594 coro_destroy (&cctx->cctx);
1595
1596 /* coro_transfer creates new, empty cctx's */
1597 if (cctx->sptr)
1598 {
1599 #if CORO_USE_VALGRIND
1600 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1601 #endif
1602
1603 #if HAVE_MMAP
1604 if (cctx->flags & CC_MAPPED)
1605 munmap (cctx->sptr, cctx->ssize);
1606 else
1607 #endif
1608 Safefree (cctx->sptr);
1609 }
1610
1611 Safefree (cctx);
1612}
1613
1614/* wether this cctx should be destructed */
1615#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1616
1617static coro_cctx *
1618cctx_get (pTHX)
1619{
1620 while (ecb_expect_true (cctx_first))
1621 {
1622 coro_cctx *cctx = cctx_first;
1623 cctx_first = cctx->next;
1624 --cctx_idle;
1625
1626 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
1627 return cctx;
1628
1629 cctx_destroy (cctx);
1630 }
1631
1632 return cctx_new_run ();
1633}
1634
1635static void
1636cctx_put (coro_cctx *cctx)
1637{
1638 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1639
1640 /* free another cctx if overlimit */
1641 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1642 {
1643 coro_cctx *first = cctx_first;
1644 cctx_first = first->next;
1645 --cctx_idle;
1646
1647 cctx_destroy (first);
1648 }
1649
1650 ++cctx_idle;
1651 cctx->next = cctx_first;
1652 cctx_first = cctx;
1653}
1654
1655/** coroutine switching *****************************************************/
1656
1657static void
1658transfer_check (pTHX_ struct coro *prev, struct coro *next)
1659{
1660 /* TODO: throwing up here is considered harmful */
1661
1662 if (ecb_expect_true (prev != next))
1663 {
1664 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1665 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1666
1667 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1668 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1669
1670#if !PERL_VERSION_ATLEAST (5,10,0)
1671 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1672 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1673#endif
1674 }
1675}
1676
1677/* always use the TRANSFER macro */
1678static void ecb_noinline /* noinline so we have a fixed stackframe */
1679transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1680{
1681 dSTACKLEVEL;
1682
1683 /* sometimes transfer is only called to set idle_sp */
1684 if (ecb_expect_false (!prev))
1685 {
1686 cctx_current->idle_sp = STACKLEVEL;
1687 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1688 }
1689 else if (ecb_expect_true (prev != next))
1690 {
1691 coro_cctx *cctx_prev;
1692
1693 if (ecb_expect_false (prev->flags & CF_NEW))
1694 {
1695 /* create a new empty/source context */
1696 prev->flags &= ~CF_NEW;
1697 prev->flags |= CF_RUNNING;
1698 }
1699
1700 prev->flags &= ~CF_RUNNING;
1701 next->flags |= CF_RUNNING;
1702
1703 /* first get rid of the old state */
1704 save_perl (aTHX_ prev);
1705
1706 if (ecb_expect_false (next->flags & CF_NEW))
1707 {
1708 /* need to start coroutine */
1709 next->flags &= ~CF_NEW;
1710 /* setup coroutine call */
1711 init_perl (aTHX_ next);
1712 }
1713 else
1714 load_perl (aTHX_ next);
1715
1716 /* possibly untie and reuse the cctx */
1717 if (ecb_expect_true (
1718 cctx_current->idle_sp == STACKLEVEL
1719 && !(cctx_current->flags & CC_TRACE)
1720 && !force_cctx
1721 ))
1722 {
1723 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1724 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1725
1726 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1727 /* without this the next cctx_get might destroy the running cctx while still in use */
1728 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1729 if (ecb_expect_true (!next->cctx))
1730 next->cctx = cctx_get (aTHX);
1731
1732 cctx_put (cctx_current);
1733 }
1734 else
1735 prev->cctx = cctx_current;
1736
1737 ++next->usecount;
1738
1739 cctx_prev = cctx_current;
1740 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1741
1742 next->cctx = 0;
1743
1744 if (ecb_expect_false (cctx_prev != cctx_current))
1745 {
1746 cctx_prev->top_env = PL_top_env;
1747 PL_top_env = cctx_current->top_env;
1748 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1749 }
1750
1751 transfer_tail (aTHX);
1752 }
1753}
1754
1755#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1756#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1757
1758/** high level stuff ********************************************************/
1759
1760/* this function is actually Coro, not Coro::State, but we call it from here */
1761/* because it is convenient - but it hasn't been declared yet for that reason */
1762static void
1763coro_call_on_destroy (pTHX_ struct coro *coro);
1764
1765static void
1766coro_state_destroy (pTHX_ struct coro *coro)
1767{
1768 if (coro->flags & CF_ZOMBIE)
1769 return;
1770
1771 slf_destroy (aTHX_ coro);
1772
1773 coro->flags |= CF_ZOMBIE;
1774
1775 if (coro->flags & CF_READY)
1776 {
1777 /* reduce nready, as destroying a ready coro effectively unreadies it */
1778 /* alternative: look through all ready queues and remove the coro */
1779 --coro_nready;
1780 }
1781 else
1782 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1783
1784 if (coro->next) coro->next->prev = coro->prev;
1785 if (coro->prev) coro->prev->next = coro->next;
1786 if (coro == coro_first) coro_first = coro->next;
1787
1788 if (coro->mainstack
1789 && coro->mainstack != main_mainstack
1790 && coro->slot
1791 && !PL_dirty)
1792 destroy_perl (aTHX_ coro);
1793
1794 cctx_destroy (coro->cctx);
1795 SvREFCNT_dec (coro->startcv);
1796 SvREFCNT_dec (coro->args);
1797 SvREFCNT_dec (coro->swap_sv);
1798 SvREFCNT_dec (CORO_THROW);
1799
1800 coro_call_on_destroy (aTHX_ coro);
1801
1802 /* more destruction mayhem in coro_state_free */
1803}
1804
1805static int
1806coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1807{
1808 struct coro *coro = (struct coro *)mg->mg_ptr;
1809 mg->mg_ptr = 0;
1810
1811 coro_state_destroy (aTHX_ coro);
1812 SvREFCNT_dec (coro->on_destroy);
1813 SvREFCNT_dec (coro->status);
1814
1815 Safefree (coro);
1816
1817 return 0;
1818}
1819
1820static int ecb_cold
1821coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1822{
1823 /* called when perl clones the current process the slow way (windows process emulation) */
1824 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
1825 mg->mg_ptr = 0;
1826 mg->mg_virtual = 0;
1827
1828 return 0;
1829}
1830
1831static MGVTBL coro_state_vtbl = {
1832 0, 0, 0, 0,
1833 coro_state_free,
1834 0,
1835#ifdef MGf_DUP
1836 coro_state_dup,
1837#else
1838# define MGf_DUP 0
1839#endif
1840};
1841
1842static void
1843prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1844{
1845 ta->prev = SvSTATE (prev_sv);
1846 ta->next = SvSTATE (next_sv);
1847 TRANSFER_CHECK (*ta);
1848}
1849
1850static void
1851api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1852{
1853 struct coro_transfer_args ta;
1854
1855 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1856 TRANSFER (ta, 1);
1857}
1858
1859/** Coro ********************************************************************/
1860
1861ecb_inline void
1862coro_enq (pTHX_ struct coro *coro)
1863{
1864 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1865
1866 SvREFCNT_inc_NN (coro->hv);
1867
1868 coro->next_ready = 0;
1869 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1870 ready [1] = coro;
1871}
1872
1873ecb_inline struct coro *
1874coro_deq (pTHX)
1875{
1876 int prio;
1877
1878 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1879 {
1880 struct coro **ready = coro_ready [prio];
1881
1882 if (ready [0])
1883 {
1884 struct coro *coro = ready [0];
1885 ready [0] = coro->next_ready;
1886 return coro;
1887 }
1888 }
1889
1890 return 0;
1891}
1892
1893static void
1894invoke_sv_ready_hook_helper (void)
1895{
1896 dTHX;
597 dSP; 1897 dSP;
598 Coro__State ctx = (Coro__State)arg;
599 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600 1898
601 coro_init_stacks (aTHX); 1899 ENTER;
602 /*PL_curcop = 0;*/ 1900 SAVETMPS;
603 /*PL_in_eval = PL_in_eval;*/ /* inherit */
604 SvREFCNT_dec (GvAV (PL_defgv));
605 GvAV (PL_defgv) = ctx->args;
606 1901
607 SPAGAIN;
608
609 if (ctx->stack)
610 {
611 ctx->cursp = 0;
612
613 PUSHMARK(SP); 1902 PUSHMARK (SP);
614 PUTBACK; 1903 PUTBACK;
615 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1904 call_sv (coro_readyhook, G_VOID | G_DISCARD);
616 1905
617 if (SvTRUE (ERRSV)) 1906 FREETMPS;
618 croak (NULL); 1907 LEAVE;
619 else 1908}
620 croak ("FATAL: CCTXT coroutine returned!"); 1909
1910static int
1911api_ready (pTHX_ SV *coro_sv)
1912{
1913 struct coro *coro = SvSTATE (coro_sv);
1914
1915 if (coro->flags & CF_READY)
1916 return 0;
1917
1918 coro->flags |= CF_READY;
1919
1920 coro_enq (aTHX_ coro);
1921
1922 if (!coro_nready++)
1923 if (coroapi.readyhook)
1924 coroapi.readyhook ();
1925
1926 return 1;
1927}
1928
1929static int
1930api_is_ready (pTHX_ SV *coro_sv)
1931{
1932 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1933}
1934
1935/* expects to own a reference to next->hv */
1936ecb_inline void
1937prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1938{
1939 SV *prev_sv = SvRV (coro_current);
1940
1941 ta->prev = SvSTATE_hv (prev_sv);
1942 ta->next = next;
1943
1944 TRANSFER_CHECK (*ta);
1945
1946 SvRV_set (coro_current, (SV *)next->hv);
1947
1948 free_coro_mortal (aTHX);
1949 coro_mortal = prev_sv;
1950}
1951
1952static void
1953prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1954{
1955 for (;;)
621 } 1956 {
622 else 1957 struct coro *next = coro_deq (aTHX);
623 {
624 UNOP myop;
625 1958
626 PL_op = (OP *)&myop; 1959 if (ecb_expect_true (next))
627
628 Zero(&myop, 1, UNOP);
629 myop.op_next = Nullop;
630 myop.op_flags = OPf_WANT_VOID;
631
632 PUSHMARK(SP);
633 XPUSHs (sub_init);
634 /*
635 * the next line is slightly wrong, as PL_op->op_next
636 * is actually being executed so we skip the first op.
637 * that doesn't matter, though, since it is only
638 * pp_nextstate and we never return...
639 * ah yes, and I don't care anyways ;)
640 */
641 PUTBACK;
642 PL_op = pp_entersub();
643 SPAGAIN;
644
645 ENTER; /* necessary e.g. for dounwind */
646 }
647}
648
649static void
650continue_coro (void *arg)
651{
652 /*
653 * this is a _very_ stripped down perl interpreter ;)
654 */
655 Coro__State ctx = (Coro__State)arg;
656 JMPENV coro_start_env;
657
658 /* same as JMPENV_BOOTSTRAP */
659 Zero(&coro_start_env, 1, JMPENV);
660 coro_start_env.je_ret = -1;
661 coro_start_env.je_mustcatch = TRUE;
662 PL_top_env = &coro_start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671STATIC void
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675 static struct coro *xnext;
676
677 if (prev != next)
678 {
679 xnext = next;
680
681 if (next->mainstack)
682 { 1960 {
683 SAVE (prev, flags); 1961 /* cannot transfer to destroyed coros, skip and look for next */
684 LOAD (next); 1962 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
685 1963 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
686 /* mark this state as in-use */ 1964 else
687 next->mainstack = 0;
688 next->tmps_ix = -2;
689
690 /* stacklevel changed? if yes, grab the stack for us! */
691 if (flags & TRANSFER_SAVE_CCTXT)
692 { 1965 {
693 if (!prev->stack) 1966 next->flags &= ~CF_READY;
694 allocate_stack (prev, 0); 1967 --coro_nready;
695 else if (prev->cursp != stacklevel 1968
696 && prev->stack->usecnt > 1) 1969 prepare_schedule_to (aTHX_ ta, next);
697 { 1970 break;
698 prev->gencnt = ++prev->stack->gencnt;
699 prev->stack->usecnt = 1;
700 }
701
702 /* has our stack been invalidated? */
703 if (next->stack && next->stack->gencnt != next->gencnt)
704 {
705 deallocate_stack (next);
706 allocate_stack (next, 1);
707 coro_create (&(next->stack->cctx),
708 continue_coro, (void *)next,
709 next->stack->sptr, labs (next->stack->ssize));
710 }
711
712 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713 /* don't add any code here */
714 } 1971 }
715
716 } 1972 }
717 else if (next->tmps_ix == -2)
718 croak ("tried to transfer to running coroutine");
719 else 1973 else
720 { 1974 {
721 SAVE (prev, -1); /* first get rid of the old state */ 1975 /* nothing to schedule: call the idle handler */
722 1976 if (SvROK (sv_idle)
723 if (flags & TRANSFER_SAVE_CCTXT) 1977 && SvOBJECT (SvRV (sv_idle)))
724 { 1978 {
725 if (!prev->stack) 1979 if (SvRV (sv_idle) == SvRV (coro_current))
726 allocate_stack (prev, 0); 1980 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
727 1981
728 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1982 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
729 { 1983 api_ready (aTHX_ SvRV (sv_idle));
730 setup_coro (next); 1984 --coro_nready;
731
732 prev->stack->refcnt++;
733 prev->stack->usecnt++;
734 next->stack = prev->stack;
735 next->gencnt = prev->gencnt;
736 }
737 else
738 {
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 setup_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 /* don't add any code here */
745 }
746 } 1985 }
747 else 1986 else
748 setup_coro (next); 1987 {
1988 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1989 dSP;
1990
1991 ENTER;
1992 SAVETMPS;
1993
1994 PUSHMARK (SP);
1995 PUTBACK;
1996 call_sv (sv_idle, G_VOID | G_DISCARD);
1997
1998 FREETMPS;
1999 LEAVE;
2000 }
749 } 2001 }
2002 }
2003}
750 2004
751 /* 2005ecb_inline void
752 * xnext is now either prev or next, depending on wether 2006prepare_cede (pTHX_ struct coro_transfer_args *ta)
753 * we switched the c stack or not. that's why I use a global 2007{
754 * variable, that should become thread-specific at one point. 2008 api_ready (aTHX_ coro_current);
2009 prepare_schedule (aTHX_ ta);
2010}
2011
2012ecb_inline void
2013prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2014{
2015 SV *prev = SvRV (coro_current);
2016
2017 if (coro_nready)
2018 {
2019 prepare_schedule (aTHX_ ta);
2020 api_ready (aTHX_ prev);
2021 }
2022 else
2023 prepare_nop (aTHX_ ta);
2024}
2025
2026static void
2027api_schedule (pTHX)
2028{
2029 struct coro_transfer_args ta;
2030
2031 prepare_schedule (aTHX_ &ta);
2032 TRANSFER (ta, 1);
2033}
2034
2035static void
2036api_schedule_to (pTHX_ SV *coro_sv)
2037{
2038 struct coro_transfer_args ta;
2039 struct coro *next = SvSTATE (coro_sv);
2040
2041 SvREFCNT_inc_NN (coro_sv);
2042 prepare_schedule_to (aTHX_ &ta, next);
2043}
2044
2045static int
2046api_cede (pTHX)
2047{
2048 struct coro_transfer_args ta;
2049
2050 prepare_cede (aTHX_ &ta);
2051
2052 if (ecb_expect_true (ta.prev != ta.next))
2053 {
2054 TRANSFER (ta, 1);
2055 return 1;
2056 }
2057 else
2058 return 0;
2059}
2060
2061static int
2062api_cede_notself (pTHX)
2063{
2064 if (coro_nready)
2065 {
2066 struct coro_transfer_args ta;
2067
2068 prepare_cede_notself (aTHX_ &ta);
2069 TRANSFER (ta, 1);
2070 return 1;
2071 }
2072 else
2073 return 0;
2074}
2075
2076static void
2077api_trace (pTHX_ SV *coro_sv, int flags)
2078{
2079 struct coro *coro = SvSTATE (coro_sv);
2080
2081 if (coro->flags & CF_RUNNING)
2082 croak ("cannot enable tracing on a running coroutine, caught");
2083
2084 if (flags & CC_TRACE)
2085 {
2086 if (!coro->cctx)
2087 coro->cctx = cctx_new_run ();
2088 else if (!(coro->cctx->flags & CC_TRACE))
2089 croak ("cannot enable tracing on coroutine with custom stack, caught");
2090
2091 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2092 }
2093 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2094 {
2095 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2096
2097 if (coro->flags & CF_RUNNING)
2098 PL_runops = RUNOPS_DEFAULT;
2099 else
2100 coro->slot->runops = RUNOPS_DEFAULT;
2101 }
2102}
2103
2104static void
2105coro_push_av (pTHX_ AV *av, I32 gimme_v)
2106{
2107 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2108 {
2109 dSP;
2110
2111 if (gimme_v == G_SCALAR)
2112 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2113 else
2114 {
2115 int i;
2116 EXTEND (SP, AvFILLp (av) + 1);
2117
2118 for (i = 0; i <= AvFILLp (av); ++i)
2119 PUSHs (AvARRAY (av)[i]);
2120 }
2121
2122 PUTBACK;
2123 }
2124}
2125
2126static void
2127coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2128{
2129 if (!coro->on_destroy)
2130 coro->on_destroy = newAV ();
2131
2132 av_push (coro->on_destroy, cb);
2133}
2134
2135static void
2136slf_destroy_join (pTHX_ struct CoroSLF *frame)
2137{
2138 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2139}
2140
2141static int
2142slf_check_join (pTHX_ struct CoroSLF *frame)
2143{
2144 struct coro *coro = (struct coro *)frame->data;
2145
2146 if (!coro->status)
2147 return 1;
2148
2149 frame->destroy = 0;
2150
2151 coro_push_av (aTHX_ coro->status, GIMME_V);
2152
2153 SvREFCNT_dec ((SV *)coro->hv);
2154
2155 return 0;
2156}
2157
2158static void
2159slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2160{
2161 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2162
2163 if (items > 1)
2164 croak ("join called with too many arguments");
2165
2166 if (coro->status)
2167 frame->prepare = prepare_nop;
2168 else
2169 {
2170 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2171 frame->prepare = prepare_schedule;
2172 }
2173
2174 frame->check = slf_check_join;
2175 frame->destroy = slf_destroy_join;
2176 frame->data = (void *)coro;
2177 SvREFCNT_inc (coro->hv);
2178}
2179
2180static void
2181coro_call_on_destroy (pTHX_ struct coro *coro)
2182{
2183 AV *od = coro->on_destroy;
2184
2185 if (!od)
2186 return;
2187
2188 while (AvFILLp (od) >= 0)
2189 {
2190 SV *cb = sv_2mortal (av_pop (od));
2191
2192 /* coro hv's (and only hv's at the moment) are supported as well */
2193 if (SvSTATEhv_p (aTHX_ cb))
2194 api_ready (aTHX_ cb);
2195 else
2196 {
2197 dSP; /* don't disturb outer sp */
2198 PUSHMARK (SP);
2199
2200 if (coro->status)
2201 {
2202 PUTBACK;
2203 coro_push_av (aTHX_ coro->status, G_ARRAY);
2204 SPAGAIN;
2205 }
2206
2207 PUTBACK;
2208 call_sv (cb, G_VOID | G_DISCARD);
2209 }
2210 }
2211}
2212
2213static void
2214coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2215{
2216 AV *av;
2217
2218 if (coro->status)
2219 {
2220 av = coro->status;
2221 av_clear (av);
2222 }
2223 else
2224 av = coro->status = newAV ();
2225
2226 /* items are actually not so common, so optimise for this case */
2227 if (items)
2228 {
2229 int i;
2230
2231 av_extend (av, items - 1);
2232
2233 for (i = 0; i < items; ++i)
2234 av_push (av, SvREFCNT_inc_NN (arg [i]));
2235 }
2236}
2237
2238static void
2239slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2240{
2241 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2242 api_ready (aTHX_ sv_manager);
2243
2244 frame->prepare = prepare_schedule;
2245 frame->check = slf_check_repeat;
2246
2247 /* as a minor optimisation, we could unwind all stacks here */
2248 /* but that puts extra pressure on pp_slf, and is not worth much */
2249 /*coro_unwind_stacks (aTHX);*/
2250}
2251
2252static void
2253slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2254{
2255 HV *coro_hv = (HV *)SvRV (coro_current);
2256
2257 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2258 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2259}
2260
2261static void
2262slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2263{
2264 HV *coro_hv;
2265 struct coro *coro;
2266
2267 if (items <= 0)
2268 croak ("Coro::cancel called without coro object,");
2269
2270 coro = SvSTATE (arg [0]);
2271 coro_hv = coro->hv;
2272
2273 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2274
2275 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2276 {
2277 /* coro currently busy cancelling something, so just notify it */
2278 coro->slf_frame.data = (void *)coro;
2279
2280 frame->prepare = prepare_nop;
2281 frame->check = slf_check_nop;
2282 }
2283 else if (coro_hv == (HV *)SvRV (coro_current))
2284 {
2285 /* cancelling the current coro is allowed, and equals terminate */
2286 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2287 }
2288 else
2289 {
2290 struct coro *self = SvSTATE_current;
2291
2292 /* otherwise we cancel directly, purely for speed reasons
2293 * unfortunately, this requires some magic trickery, as
2294 * somebody else could cancel us, so we have to fight the cancellation.
2295 * this is ugly, and hopefully fully worth the extra speed.
2296 * besides, I can't get the slow-but-safe version working...
755 */ 2297 */
756 xnext->cursp = stacklevel; 2298 slf_frame.data = 0;
757 } 2299 self->flags |= CF_NOCANCEL;
2300 coro_state_destroy (aTHX_ coro);
2301 self->flags &= ~CF_NOCANCEL;
758 2302
759 if (coro_mortal) 2303 if (slf_frame.data)
2304 {
2305 /* while we were busy we have been cancelled, so terminate */
2306 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2307 }
2308 else
2309 {
2310 frame->prepare = prepare_nop;
2311 frame->check = slf_check_nop;
2312 }
760 { 2313 }
761 SvREFCNT_dec (coro_mortal); 2314}
762 coro_mortal = 0; 2315
2316static int
2317slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2318{
2319 frame->prepare = 0;
2320 coro_unwind_stacks (aTHX);
2321
2322 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2323
2324 return 1;
2325}
2326
2327static int
2328safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2329{
2330 if (coro->cctx)
2331 croak ("coro inside C callback, unable to cancel at this time, caught");
2332
2333 if (coro->flags & CF_NEW)
763 } 2334 {
764} 2335 coro_set_status (aTHX_ coro, arg, items);
2336 coro_state_destroy (aTHX_ coro);
2337 }
2338 else
2339 {
2340 if (!coro->slf_frame.prepare)
2341 croak ("coro outside an SLF function, unable to cancel at this time, caught");
765 2342
766#define SV_CORO(sv,func) \ 2343 slf_destroy (aTHX_ coro);
767 do { \
768 if (SvROK (sv)) \
769 sv = SvRV (sv); \
770 \
771 if (SvTYPE(sv) == SVt_PVHV) \
772 { \
773 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
774 \
775 if (!he) \
776 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
777 \
778 (sv) = SvRV (HeVAL(he)); \
779 } \
780 \
781 /* must also be changed inside Coro::Cont::yield */ \
782 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
783 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784 \
785 } while(0)
786 2344
787#define SvSTATE(sv) (struct coro *)SvIV (sv) 2345 coro_set_status (aTHX_ coro, arg, items);
2346 coro->slf_frame.prepare = prepare_nop;
2347 coro->slf_frame.check = slf_check_safe_cancel;
788 2348
789static void 2349 api_ready (aTHX_ (SV *)coro->hv);
790api_transfer(pTHX_ SV *prev, SV *next, int flags) 2350 }
791{
792 SV_CORO (prev, "Coro::transfer");
793 SV_CORO (next, "Coro::transfer");
794 2351
795 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 2352 return 1;
796} 2353}
797 2354
798/** Coro ********************************************************************/ 2355/*****************************************************************************/
2356/* async pool handler */
799 2357
800#define PRIO_MAX 3
801#define PRIO_HIGH 1
802#define PRIO_NORMAL 0
803#define PRIO_LOW -1
804#define PRIO_IDLE -3
805#define PRIO_MIN -4
806
807/* for Coro.pm */
808static GV *coro_current, *coro_idle;
809static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
810static int coro_nready;
811
812static void 2358static int
813coro_enq (SV *sv) 2359slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
814{ 2360{
815 if (SvTYPE (sv) == SVt_PVHV) 2361 HV *hv = (HV *)SvRV (coro_current);
2362 struct coro *coro = (struct coro *)frame->data;
2363
2364 if (!coro->invoke_cb)
2365 return 1; /* loop till we have invoke */
2366 else
2367 {
2368 hv_store (hv, "desc", sizeof ("desc") - 1,
2369 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2370
2371 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2372
816 { 2373 {
817 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 2374 dSP;
818 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2375 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2376 PUTBACK;
2377 }
819 2378
820 prio = prio > PRIO_MAX ? PRIO_MAX 2379 SvREFCNT_dec (GvAV (PL_defgv));
821 : prio < PRIO_MIN ? PRIO_MIN 2380 GvAV (PL_defgv) = coro->invoke_av;
822 : prio; 2381 coro->invoke_av = 0;
823 2382
824 av_push (coro_ready [prio - PRIO_MIN], sv);
825 coro_nready++;
826
827 return; 2383 return 0;
2384 }
2385}
2386
2387static void
2388slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2389{
2390 HV *hv = (HV *)SvRV (coro_current);
2391 struct coro *coro = SvSTATE_hv ((SV *)hv);
2392
2393 if (ecb_expect_true (coro->saved_deffh))
828 } 2394 {
2395 /* subsequent iteration */
2396 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2397 coro->saved_deffh = 0;
829 2398
830 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2399 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2400 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2401 {
2402 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2403 return;
2404 }
2405 else
2406 {
2407 av_clear (GvAV (PL_defgv));
2408 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2409
2410 coro->prio = 0;
2411
2412 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2413 api_trace (aTHX_ coro_current, 0);
2414
2415 frame->prepare = prepare_schedule;
2416 av_push (av_async_pool, SvREFCNT_inc (hv));
2417 }
2418 }
2419 else
2420 {
2421 /* first iteration, simply fall through */
2422 frame->prepare = prepare_nop;
2423 }
2424
2425 frame->check = slf_check_pool_handler;
2426 frame->data = (void *)coro;
2427}
2428
2429/*****************************************************************************/
2430/* rouse callback */
2431
2432#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2433
2434static void
2435coro_rouse_callback (pTHX_ CV *cv)
2436{
2437 dXSARGS;
2438 SV *data = (SV *)S_GENSUB_ARG;
2439
2440 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2441 {
2442 /* first call, set args */
2443 SV *coro = SvRV (data);
2444 AV *av = newAV ();
2445
2446 SvRV_set (data, (SV *)av);
2447
2448 /* better take a full copy of the arguments */
2449 while (items--)
2450 av_store (av, items, newSVsv (ST (items)));
2451
2452 api_ready (aTHX_ coro);
2453 SvREFCNT_dec (coro);
2454 }
2455
2456 XSRETURN_EMPTY;
2457}
2458
2459static int
2460slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2461{
2462 SV *data = (SV *)frame->data;
2463
2464 if (CORO_THROW)
2465 return 0;
2466
2467 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2468 return 1;
2469
2470 /* now push all results on the stack */
2471 {
2472 dSP;
2473 AV *av = (AV *)SvRV (data);
2474 int i;
2475
2476 EXTEND (SP, AvFILLp (av) + 1);
2477 for (i = 0; i <= AvFILLp (av); ++i)
2478 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2479
2480 /* we have stolen the elements, so set length to zero and free */
2481 AvFILLp (av) = -1;
2482 av_undef (av);
2483
2484 PUTBACK;
2485 }
2486
2487 return 0;
2488}
2489
2490static void
2491slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2492{
2493 SV *cb;
2494
2495 if (items)
2496 cb = arg [0];
2497 else
2498 {
2499 struct coro *coro = SvSTATE_current;
2500
2501 if (!coro->rouse_cb)
2502 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2503
2504 cb = sv_2mortal (coro->rouse_cb);
2505 coro->rouse_cb = 0;
2506 }
2507
2508 if (!SvROK (cb)
2509 || SvTYPE (SvRV (cb)) != SVt_PVCV
2510 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2511 croak ("Coro::rouse_wait called with illegal callback argument,");
2512
2513 {
2514 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2515 SV *data = (SV *)S_GENSUB_ARG;
2516
2517 frame->data = (void *)data;
2518 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2519 frame->check = slf_check_rouse_wait;
2520 }
831} 2521}
832 2522
833static SV * 2523static SV *
834coro_deq (int min_prio) 2524coro_new_rouse_cb (pTHX)
835{ 2525{
836 int prio = PRIO_MAX - PRIO_MIN; 2526 HV *hv = (HV *)SvRV (coro_current);
2527 struct coro *coro = SvSTATE_hv (hv);
2528 SV *data = newRV_inc ((SV *)hv);
2529 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
837 2530
838 min_prio -= PRIO_MIN; 2531 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
839 if (min_prio < 0) 2532 SvREFCNT_dec (data); /* magicext increases the refcount */
840 min_prio = 0;
841 2533
842 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2534 SvREFCNT_dec (coro->rouse_cb);
843 if (av_len (coro_ready[prio]) >= 0) 2535 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2536
2537 return cb;
2538}
2539
2540/*****************************************************************************/
2541/* schedule-like-function opcode (SLF) */
2542
2543static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2544static const CV *slf_cv;
2545static SV **slf_argv;
2546static int slf_argc, slf_arga; /* count, allocated */
2547static I32 slf_ax; /* top of stack, for restore */
2548
2549/* this restores the stack in the case we patched the entersub, to */
2550/* recreate the stack frame as perl will on following calls */
2551/* since entersub cleared the stack */
2552static OP *
2553pp_restore (pTHX)
2554{
2555 int i;
2556 SV **SP = PL_stack_base + slf_ax;
2557
2558 PUSHMARK (SP);
2559
2560 EXTEND (SP, slf_argc + 1);
2561
2562 for (i = 0; i < slf_argc; ++i)
2563 PUSHs (sv_2mortal (slf_argv [i]));
2564
2565 PUSHs ((SV *)CvGV (slf_cv));
2566
2567 RETURNOP (slf_restore.op_first);
2568}
2569
2570static void
2571slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2572{
2573 SV **arg = (SV **)slf_frame.data;
2574
2575 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2576}
2577
2578static void
2579slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2580{
2581 if (items != 2)
2582 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2583
2584 frame->prepare = slf_prepare_transfer;
2585 frame->check = slf_check_nop;
2586 frame->data = (void *)arg; /* let's hope it will stay valid */
2587}
2588
2589static void
2590slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2591{
2592 frame->prepare = prepare_schedule;
2593 frame->check = slf_check_nop;
2594}
2595
2596static void
2597slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2598{
2599 struct coro *next = (struct coro *)slf_frame.data;
2600
2601 SvREFCNT_inc_NN (next->hv);
2602 prepare_schedule_to (aTHX_ ta, next);
2603}
2604
2605static void
2606slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2607{
2608 if (!items)
2609 croak ("Coro::schedule_to expects a coroutine argument, caught");
2610
2611 frame->data = (void *)SvSTATE (arg [0]);
2612 frame->prepare = slf_prepare_schedule_to;
2613 frame->check = slf_check_nop;
2614}
2615
2616static void
2617slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 api_ready (aTHX_ SvRV (coro_current));
2620
2621 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2622}
2623
2624static void
2625slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2626{
2627 frame->prepare = prepare_cede;
2628 frame->check = slf_check_nop;
2629}
2630
2631static void
2632slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2633{
2634 frame->prepare = prepare_cede_notself;
2635 frame->check = slf_check_nop;
2636}
2637
2638/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2639static void
2640slf_destroy (pTHX_ struct coro *coro)
2641{
2642 /* this callback is reserved for slf functions needing to do cleanup */
2643 if (coro->slf_frame.destroy && coro->slf_frame.prepare && !PL_dirty)
2644 coro->slf_frame.destroy (aTHX_ &coro->slf_frame);
2645
2646 /*
2647 * The on_destroy above most likely is from an SLF call.
2648 * Since by definition the SLF call will not finish when we destroy
2649 * the coro, we will have to force-finish it here, otherwise
2650 * cleanup functions cannot call SLF functions.
2651 */
2652 coro->slf_frame.prepare = 0;
2653}
2654
2655/*
2656 * these not obviously related functions are all rolled into one
2657 * function to increase chances that they all will call transfer with the same
2658 * stack offset
2659 * SLF stands for "schedule-like-function".
2660 */
2661static OP *
2662pp_slf (pTHX)
2663{
2664 I32 checkmark; /* mark SP to see how many elements check has pushed */
2665
2666 /* set up the slf frame, unless it has already been set-up */
2667 /* the latter happens when a new coro has been started */
2668 /* or when a new cctx was attached to an existing coroutine */
2669 if (ecb_expect_true (!slf_frame.prepare))
2670 {
2671 /* first iteration */
2672 dSP;
2673 SV **arg = PL_stack_base + TOPMARK + 1;
2674 int items = SP - arg; /* args without function object */
2675 SV *gv = *sp;
2676
2677 /* do a quick consistency check on the "function" object, and if it isn't */
2678 /* for us, divert to the real entersub */
2679 if (SvTYPE (gv) != SVt_PVGV
2680 || !GvCV (gv)
2681 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2682 return PL_ppaddr[OP_ENTERSUB](aTHX);
2683
2684 if (!(PL_op->op_flags & OPf_STACKED))
844 { 2685 {
845 coro_nready--; 2686 /* ampersand-form of call, use @_ instead of stack */
846 return av_shift (coro_ready[prio]); 2687 AV *av = GvAV (PL_defgv);
2688 arg = AvARRAY (av);
2689 items = AvFILLp (av) + 1;
847 } 2690 }
2691
2692 /* now call the init function, which needs to set up slf_frame */
2693 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2694 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2695
2696 /* pop args */
2697 SP = PL_stack_base + POPMARK;
2698
2699 PUTBACK;
2700 }
2701
2702 /* now that we have a slf_frame, interpret it! */
2703 /* we use a callback system not to make the code needlessly */
2704 /* complicated, but so we can run multiple perl coros from one cctx */
2705
2706 do
2707 {
2708 struct coro_transfer_args ta;
2709
2710 slf_frame.prepare (aTHX_ &ta);
2711 TRANSFER (ta, 0);
2712
2713 checkmark = PL_stack_sp - PL_stack_base;
2714 }
2715 while (slf_frame.check (aTHX_ &slf_frame));
2716
2717 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2718
2719 /* exception handling */
2720 if (ecb_expect_false (CORO_THROW))
2721 {
2722 SV *exception = sv_2mortal (CORO_THROW);
2723
2724 CORO_THROW = 0;
2725 sv_setsv (ERRSV, exception);
2726 croak (0);
2727 }
2728
2729 /* return value handling - mostly like entersub */
2730 /* make sure we put something on the stack in scalar context */
2731 if (GIMME_V == G_SCALAR
2732 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2733 {
2734 dSP;
2735 SV **bot = PL_stack_base + checkmark;
2736
2737 if (sp == bot) /* too few, push undef */
2738 bot [1] = &PL_sv_undef;
2739 else /* too many, take last one */
2740 bot [1] = *sp;
2741
2742 SP = bot + 1;
2743
2744 PUTBACK;
2745 }
2746
2747 return NORMAL;
2748}
2749
2750static void
2751api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2752{
2753 int i;
2754 SV **arg = PL_stack_base + ax;
2755 int items = PL_stack_sp - arg + 1;
2756
2757 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2758
2759 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2760 && PL_op->op_ppaddr != pp_slf)
2761 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2762
2763 CvFLAGS (cv) |= CVf_SLF;
2764 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2765 slf_cv = cv;
2766
2767 /* we patch the op, and then re-run the whole call */
2768 /* we have to put the same argument on the stack for this to work */
2769 /* and this will be done by pp_restore */
2770 slf_restore.op_next = (OP *)&slf_restore;
2771 slf_restore.op_type = OP_CUSTOM;
2772 slf_restore.op_ppaddr = pp_restore;
2773 slf_restore.op_first = PL_op;
2774
2775 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2776
2777 if (PL_op->op_flags & OPf_STACKED)
2778 {
2779 if (items > slf_arga)
2780 {
2781 slf_arga = items;
2782 Safefree (slf_argv);
2783 New (0, slf_argv, slf_arga, SV *);
2784 }
2785
2786 slf_argc = items;
2787
2788 for (i = 0; i < items; ++i)
2789 slf_argv [i] = SvREFCNT_inc (arg [i]);
2790 }
2791 else
2792 slf_argc = 0;
2793
2794 PL_op->op_ppaddr = pp_slf;
2795 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2796
2797 PL_op = (OP *)&slf_restore;
2798}
2799
2800/*****************************************************************************/
2801/* dynamic wind */
2802
2803static void
2804on_enterleave_call (pTHX_ SV *cb)
2805{
2806 dSP;
2807
2808 PUSHSTACK;
2809
2810 PUSHMARK (SP);
2811 PUTBACK;
2812 call_sv (cb, G_VOID | G_DISCARD);
2813 SPAGAIN;
2814
2815 POPSTACK;
2816}
2817
2818static SV *
2819coro_avp_pop_and_free (pTHX_ AV **avp)
2820{
2821 AV *av = *avp;
2822 SV *res = av_pop (av);
2823
2824 if (AvFILLp (av) < 0)
2825 {
2826 *avp = 0;
2827 SvREFCNT_dec (av);
2828 }
2829
2830 return res;
2831}
2832
2833static void
2834coro_pop_on_enter (pTHX_ void *coro)
2835{
2836 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2837 SvREFCNT_dec (cb);
2838}
2839
2840static void
2841coro_pop_on_leave (pTHX_ void *coro)
2842{
2843 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2844 on_enterleave_call (aTHX_ sv_2mortal (cb));
2845}
2846
2847/*****************************************************************************/
2848/* PerlIO::cede */
2849
2850typedef struct
2851{
2852 PerlIOBuf base;
2853 NV next, every;
2854} PerlIOCede;
2855
2856static IV ecb_cold
2857PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2858{
2859 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2860
2861 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2862 self->next = nvtime () + self->every;
2863
2864 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2865}
2866
2867static SV * ecb_cold
2868PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2869{
2870 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2871
2872 return newSVnv (self->every);
2873}
2874
2875static IV
2876PerlIOCede_flush (pTHX_ PerlIO *f)
2877{
2878 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2879 double now = nvtime ();
2880
2881 if (now >= self->next)
2882 {
2883 api_cede (aTHX);
2884 self->next = now + self->every;
2885 }
2886
2887 return PerlIOBuf_flush (aTHX_ f);
2888}
2889
2890static PerlIO_funcs PerlIO_cede =
2891{
2892 sizeof(PerlIO_funcs),
2893 "cede",
2894 sizeof(PerlIOCede),
2895 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2896 PerlIOCede_pushed,
2897 PerlIOBuf_popped,
2898 PerlIOBuf_open,
2899 PerlIOBase_binmode,
2900 PerlIOCede_getarg,
2901 PerlIOBase_fileno,
2902 PerlIOBuf_dup,
2903 PerlIOBuf_read,
2904 PerlIOBuf_unread,
2905 PerlIOBuf_write,
2906 PerlIOBuf_seek,
2907 PerlIOBuf_tell,
2908 PerlIOBuf_close,
2909 PerlIOCede_flush,
2910 PerlIOBuf_fill,
2911 PerlIOBase_eof,
2912 PerlIOBase_error,
2913 PerlIOBase_clearerr,
2914 PerlIOBase_setlinebuf,
2915 PerlIOBuf_get_base,
2916 PerlIOBuf_bufsiz,
2917 PerlIOBuf_get_ptr,
2918 PerlIOBuf_get_cnt,
2919 PerlIOBuf_set_ptrcnt,
2920};
2921
2922/*****************************************************************************/
2923/* Coro::Semaphore & Coro::Signal */
2924
2925static SV *
2926coro_waitarray_new (pTHX_ int count)
2927{
2928 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2929 AV *av = newAV ();
2930 SV **ary;
2931
2932 /* unfortunately, building manually saves memory */
2933 Newx (ary, 2, SV *);
2934 AvALLOC (av) = ary;
2935#if PERL_VERSION_ATLEAST (5,10,0)
2936 AvARRAY (av) = ary;
2937#else
2938 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2939 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2940 SvPVX ((SV *)av) = (char *)ary;
2941#endif
2942 AvMAX (av) = 1;
2943 AvFILLp (av) = 0;
2944 ary [0] = newSViv (count);
2945
2946 return newRV_noinc ((SV *)av);
2947}
2948
2949/* semaphore */
2950
2951static void
2952coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2953{
2954 SV *count_sv = AvARRAY (av)[0];
2955 IV count = SvIVX (count_sv);
2956
2957 count += adjust;
2958 SvIVX (count_sv) = count;
2959
2960 /* now wake up as many waiters as are expected to lock */
2961 while (count > 0 && AvFILLp (av) > 0)
2962 {
2963 SV *cb;
2964
2965 /* swap first two elements so we can shift a waiter */
2966 AvARRAY (av)[0] = AvARRAY (av)[1];
2967 AvARRAY (av)[1] = count_sv;
2968 cb = av_shift (av);
2969
2970 if (SvOBJECT (cb))
2971 {
2972 api_ready (aTHX_ cb);
2973 --count;
2974 }
2975 else if (SvTYPE (cb) == SVt_PVCV)
2976 {
2977 dSP;
2978 PUSHMARK (SP);
2979 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2980 PUTBACK;
2981 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2982 }
2983
2984 SvREFCNT_dec (cb);
2985 }
2986}
2987
2988static void
2989coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
2990{
2991 /* call $sem->adjust (0) to possibly wake up some other waiters */
2992 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
2993}
2994
2995static int
2996slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2997{
2998 AV *av = (AV *)frame->data;
2999 SV *count_sv = AvARRAY (av)[0];
3000 SV *coro_hv = SvRV (coro_current);
3001
3002 /* if we are about to throw, don't actually acquire the lock, just throw */
3003 if (CORO_THROW)
3004 return 0;
3005 else if (SvIVX (count_sv) > 0)
3006 {
3007 frame->destroy = 0;
3008
3009 if (acquire)
3010 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3011 else
3012 coro_semaphore_adjust (aTHX_ av, 0);
3013
3014 return 0;
3015 }
3016 else
3017 {
3018 int i;
3019 /* if we were woken up but can't down, we look through the whole */
3020 /* waiters list and only add us if we aren't in there already */
3021 /* this avoids some degenerate memory usage cases */
3022 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3023 if (AvARRAY (av)[i] == coro_hv)
3024 return 1;
3025
3026 av_push (av, SvREFCNT_inc (coro_hv));
3027 return 1;
3028 }
3029}
3030
3031static int
3032slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3033{
3034 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3035}
3036
3037static int
3038slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3039{
3040 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3041}
3042
3043static void
3044slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3045{
3046 AV *av = (AV *)SvRV (arg [0]);
3047
3048 if (SvIVX (AvARRAY (av)[0]) > 0)
3049 {
3050 frame->data = (void *)av;
3051 frame->prepare = prepare_nop;
3052 }
3053 else
3054 {
3055 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3056
3057 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3058 frame->prepare = prepare_schedule;
3059 /* to avoid race conditions when a woken-up coro gets terminated */
3060 /* we arrange for a temporary on_destroy that calls adjust (0) */
3061 frame->destroy = coro_semaphore_destroy;
3062 }
3063}
3064
3065static void
3066slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3067{
3068 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3069 frame->check = slf_check_semaphore_down;
3070}
3071
3072static void
3073slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3074{
3075 if (items >= 2)
3076 {
3077 /* callback form */
3078 AV *av = (AV *)SvRV (arg [0]);
3079 SV *cb_cv = s_get_cv_croak (arg [1]);
3080
3081 av_push (av, SvREFCNT_inc_NN (cb_cv));
3082
3083 if (SvIVX (AvARRAY (av)[0]) > 0)
3084 coro_semaphore_adjust (aTHX_ av, 0);
3085
3086 frame->prepare = prepare_nop;
3087 frame->check = slf_check_nop;
3088 }
3089 else
3090 {
3091 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3092 frame->check = slf_check_semaphore_wait;
3093 }
3094}
3095
3096/* signal */
3097
3098static void
3099coro_signal_wake (pTHX_ AV *av, int count)
3100{
3101 SvIVX (AvARRAY (av)[0]) = 0;
3102
3103 /* now signal count waiters */
3104 while (count > 0 && AvFILLp (av) > 0)
3105 {
3106 SV *cb;
3107
3108 /* swap first two elements so we can shift a waiter */
3109 cb = AvARRAY (av)[0];
3110 AvARRAY (av)[0] = AvARRAY (av)[1];
3111 AvARRAY (av)[1] = cb;
3112
3113 cb = av_shift (av);
3114
3115 if (SvTYPE (cb) == SVt_PVCV)
3116 {
3117 dSP;
3118 PUSHMARK (SP);
3119 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3120 PUTBACK;
3121 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3122 }
3123 else
3124 {
3125 api_ready (aTHX_ cb);
3126 sv_setiv (cb, 0); /* signal waiter */
3127 }
3128
3129 SvREFCNT_dec (cb);
3130
3131 --count;
3132 }
3133}
3134
3135static int
3136slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3137{
3138 /* if we are about to throw, also stop waiting */
3139 return SvROK ((SV *)frame->data) && !CORO_THROW;
3140}
3141
3142static void
3143slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3144{
3145 AV *av = (AV *)SvRV (arg [0]);
3146
3147 if (items >= 2)
3148 {
3149 SV *cb_cv = s_get_cv_croak (arg [1]);
3150 av_push (av, SvREFCNT_inc_NN (cb_cv));
3151
3152 if (SvIVX (AvARRAY (av)[0]))
3153 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3154
3155 frame->prepare = prepare_nop;
3156 frame->check = slf_check_nop;
3157 }
3158 else if (SvIVX (AvARRAY (av)[0]))
3159 {
3160 SvIVX (AvARRAY (av)[0]) = 0;
3161 frame->prepare = prepare_nop;
3162 frame->check = slf_check_nop;
3163 }
3164 else
3165 {
3166 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3167
3168 av_push (av, waiter);
3169
3170 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3171 frame->prepare = prepare_schedule;
3172 frame->check = slf_check_signal_wait;
3173 }
3174}
3175
3176/*****************************************************************************/
3177/* Coro::AIO */
3178
3179#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3180
3181/* helper storage struct */
3182struct io_state
3183{
3184 int errorno;
3185 I32 laststype; /* U16 in 5.10.0 */
3186 int laststatval;
3187 Stat_t statcache;
3188};
3189
3190static void
3191coro_aio_callback (pTHX_ CV *cv)
3192{
3193 dXSARGS;
3194 AV *state = (AV *)S_GENSUB_ARG;
3195 SV *coro = av_pop (state);
3196 SV *data_sv = newSV (sizeof (struct io_state));
3197
3198 av_extend (state, items - 1);
3199
3200 sv_upgrade (data_sv, SVt_PV);
3201 SvCUR_set (data_sv, sizeof (struct io_state));
3202 SvPOK_only (data_sv);
3203
3204 {
3205 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3206
3207 data->errorno = errno;
3208 data->laststype = PL_laststype;
3209 data->laststatval = PL_laststatval;
3210 data->statcache = PL_statcache;
3211 }
3212
3213 /* now build the result vector out of all the parameters and the data_sv */
3214 {
3215 int i;
3216
3217 for (i = 0; i < items; ++i)
3218 av_push (state, SvREFCNT_inc_NN (ST (i)));
3219 }
3220
3221 av_push (state, data_sv);
3222
3223 api_ready (aTHX_ coro);
3224 SvREFCNT_dec (coro);
3225 SvREFCNT_dec ((AV *)state);
3226}
3227
3228static int
3229slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3230{
3231 AV *state = (AV *)frame->data;
3232
3233 /* if we are about to throw, return early */
3234 /* this does not cancel the aio request, but at least */
3235 /* it quickly returns */
3236 if (CORO_THROW)
3237 return 0;
3238
3239 /* one element that is an RV? repeat! */
3240 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3241 return 1;
3242
3243 /* restore status */
3244 {
3245 SV *data_sv = av_pop (state);
3246 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3247
3248 errno = data->errorno;
3249 PL_laststype = data->laststype;
3250 PL_laststatval = data->laststatval;
3251 PL_statcache = data->statcache;
3252
3253 SvREFCNT_dec (data_sv);
3254 }
3255
3256 /* push result values */
3257 {
3258 dSP;
3259 int i;
3260
3261 EXTEND (SP, AvFILLp (state) + 1);
3262 for (i = 0; i <= AvFILLp (state); ++i)
3263 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3264
3265 PUTBACK;
3266 }
848 3267
849 return 0; 3268 return 0;
850} 3269}
851 3270
852static void 3271static void
853api_ready (SV *coro) 3272slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
854{ 3273{
855 if (SvROK (coro)) 3274 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
856 coro = SvRV (coro);
857
858 coro_enq (SvREFCNT_inc (coro));
859}
860
861static void
862api_schedule (void)
863{
864 SV *prev, *next;
865
866 prev = SvRV (GvSV (coro_current)); 3275 SV *coro_hv = SvRV (coro_current);
867 next = coro_deq (PRIO_MIN); 3276 struct coro *coro = SvSTATE_hv (coro_hv);
868 3277
869 if (!next) 3278 /* put our coroutine id on the state arg */
870 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 3279 av_push (state, SvREFCNT_inc_NN (coro_hv));
871 3280
872 /* free this only after the transfer */ 3281 /* first see whether we have a non-zero priority and set it as AIO prio */
873 coro_mortal = prev; 3282 if (coro->prio)
874 SV_CORO (prev, "Coro::schedule"); 3283 {
3284 dSP;
875 3285
876 SvRV (GvSV (coro_current)) = next; 3286 static SV *prio_cv;
3287 static SV *prio_sv;
877 3288
878 SV_CORO (next, "Coro::schedule"); 3289 if (ecb_expect_false (!prio_cv))
3290 {
3291 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3292 prio_sv = newSViv (0);
3293 }
879 3294
880 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 3295 PUSHMARK (SP);
881 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 3296 sv_setiv (prio_sv, coro->prio);
882} 3297 XPUSHs (prio_sv);
883 3298
884static void 3299 PUTBACK;
885api_cede (void) 3300 call_sv (prio_cv, G_VOID | G_DISCARD);
886{ 3301 }
887 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
888 3302
889 api_schedule (); 3303 /* now call the original request */
890} 3304 {
3305 dSP;
3306 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3307 int i;
891 3308
3309 PUSHMARK (SP);
3310
3311 /* first push all args to the stack */
3312 EXTEND (SP, items + 1);
3313
3314 for (i = 0; i < items; ++i)
3315 PUSHs (arg [i]);
3316
3317 /* now push the callback closure */
3318 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3319
3320 /* now call the AIO function - we assume our request is uncancelable */
3321 PUTBACK;
3322 call_sv ((SV *)req, G_VOID | G_DISCARD);
3323 }
3324
3325 /* now that the request is going, we loop till we have a result */
3326 frame->data = (void *)state;
3327 frame->prepare = prepare_schedule;
3328 frame->check = slf_check_aio_req;
3329}
3330
3331static void
3332coro_aio_req_xs (pTHX_ CV *cv)
3333{
3334 dXSARGS;
3335
3336 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3337
3338 XSRETURN_EMPTY;
3339}
3340
3341/*****************************************************************************/
3342
3343#if CORO_CLONE
3344# include "clone.c"
3345#endif
3346
3347/*****************************************************************************/
3348
3349static SV *
3350coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3351{
3352 SV *coro_sv;
3353 struct coro *coro;
3354 MAGIC *mg;
3355 HV *hv;
3356 SV *cb;
3357 int i;
3358
3359 if (argc > 0)
3360 {
3361 cb = s_get_cv_croak (argv [0]);
3362
3363 if (!is_coro)
3364 {
3365 if (CvISXSUB (cb))
3366 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3367
3368 if (!CvROOT (cb))
3369 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3370 }
3371 }
3372
3373 Newz (0, coro, 1, struct coro);
3374 coro->args = newAV ();
3375 coro->flags = CF_NEW;
3376
3377 if (coro_first) coro_first->prev = coro;
3378 coro->next = coro_first;
3379 coro_first = coro;
3380
3381 coro->hv = hv = newHV ();
3382 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3383 mg->mg_flags |= MGf_DUP;
3384 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3385
3386 if (argc > 0)
3387 {
3388 av_extend (coro->args, argc + is_coro - 1);
3389
3390 if (is_coro)
3391 {
3392 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3393 cb = (SV *)cv_coro_run;
3394 }
3395
3396 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3397
3398 for (i = 1; i < argc; i++)
3399 av_push (coro->args, newSVsv (argv [i]));
3400 }
3401
3402 return coro_sv;
3403}
3404
3405#ifndef __cplusplus
3406ecb_cold XS(boot_Coro__State);
3407#endif
3408
3409#if CORO_JIT
3410
3411static void ecb_noinline ecb_cold
3412pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3413{
3414 dSP;
3415 AV *av = newAV ();
3416
3417 av_store (av, 3, newSVuv (d));
3418 av_store (av, 2, newSVuv (c));
3419 av_store (av, 1, newSVuv (b));
3420 av_store (av, 0, newSVuv (a));
3421
3422 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3423
3424 PUTBACK;
3425}
3426
3427static void ecb_noinline ecb_cold
3428jit_init (pTHX)
3429{
3430 dSP;
3431 SV *load, *save;
3432 char *map_base;
3433 char *load_ptr, *save_ptr;
3434 STRLEN load_len, save_len, map_len;
3435 int count;
3436
3437 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3438
3439 PUSHMARK (SP);
3440 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3441 #include "state.h"
3442 count = call_pv ("Coro::State::_jit", G_ARRAY);
3443 SPAGAIN;
3444
3445 save = POPs; save_ptr = SvPVbyte (save, save_len);
3446 load = POPs; load_ptr = SvPVbyte (load, load_len);
3447
3448 map_len = load_len + save_len + 16;
3449
3450 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3451
3452 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3453
3454 load_perl_slots = (load_save_perl_slots_type)map_base;
3455 memcpy (map_base, load_ptr, load_len);
3456
3457 map_base += (load_len + 15) & ~15;
3458
3459 save_perl_slots = (load_save_perl_slots_type)map_base;
3460 memcpy (map_base, save_ptr, save_len);
3461
3462 /* we are good citizens and try to make the page read-only, so the evil evil */
3463 /* hackers might have it a bit more difficult */
3464 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3465
3466 PUTBACK;
3467 eval_pv ("undef &Coro::State::_jit", 1);
3468}
3469
3470#endif
3471
892MODULE = Coro::State PACKAGE = Coro::State 3472MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
893 3473
894PROTOTYPES: ENABLE 3474PROTOTYPES: DISABLE
895 3475
896BOOT: 3476BOOT:
897{ /* {} necessary for stoopid perl-5.6.x */ 3477{
898 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3478#ifdef USE_ITHREADS
899 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3479# if CORO_PTHREAD
3480 coro_thx = PERL_GET_CONTEXT;
3481# endif
3482#endif
3483 BOOT_PAGESIZE;
3484
3485 /* perl defines these to check for existance first, but why it doesn't */
3486 /* just create them one at init time is not clear to me, except for */
3487 /* programs trying to delete them, but... */
3488 /* anyway, we declare this as invalid and make sure they are initialised here */
3489 DEFSV;
3490 ERRSV;
3491
3492 cctx_current = cctx_new_empty ();
3493
3494 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3495 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3496
3497 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3498 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3499 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3500
3501 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3502 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3503 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3504
900 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3505 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901 3506
902 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3507 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
903 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3508 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
904 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3509 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
905 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3510 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
906
907 if (!padlist_cache)
908 padlist_cache = newHV ();
909 3511
910 main_mainstack = PL_mainstack; 3512 main_mainstack = PL_mainstack;
3513 main_top_env = PL_top_env;
911 3514
3515 while (main_top_env->je_prev)
3516 main_top_env = main_top_env->je_prev;
3517
3518 {
3519 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3520
3521 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3522 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3523
3524 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3525 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3526 }
3527
912 coroapi.ver = CORO_API_VERSION; 3528 coroapi.ver = CORO_API_VERSION;
3529 coroapi.rev = CORO_API_REVISION;
3530
913 coroapi.transfer = api_transfer; 3531 coroapi.transfer = api_transfer;
914}
915 3532
916Coro::State 3533 coroapi.sv_state = SvSTATE_;
917_newprocess(args) 3534 coroapi.execute_slf = api_execute_slf;
918 SV * args 3535 coroapi.prepare_nop = prepare_nop;
3536 coroapi.prepare_schedule = prepare_schedule;
3537 coroapi.prepare_cede = prepare_cede;
3538 coroapi.prepare_cede_notself = prepare_cede_notself;
3539
3540 time_init (aTHX);
3541
3542 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3543#if CORO_JIT
3544 PUTBACK;
3545 jit_init (aTHX);
3546 SPAGAIN;
3547#endif
3548}
3549
3550SV *
3551new (SV *klass, ...)
3552 ALIAS:
3553 Coro::new = 1
3554 CODE:
3555 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3556 OUTPUT:
3557 RETVAL
3558
3559void
3560transfer (...)
3561 PROTOTYPE: $$
3562 CODE:
3563 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3564
3565void
3566_exit (int code)
919 PROTOTYPE: $ 3567 PROTOTYPE: $
3568 CODE:
3569 _exit (code);
3570
3571SV *
3572clone (Coro::State coro)
3573 CODE:
3574{
3575#if CORO_CLONE
3576 struct coro *ncoro = coro_clone (aTHX_ coro);
3577 MAGIC *mg;
3578 /* TODO: too much duplication */
3579 ncoro->hv = newHV ();
3580 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3581 mg->mg_flags |= MGf_DUP;
3582 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3583#else
3584 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3585#endif
3586}
3587 OUTPUT:
3588 RETVAL
3589
3590int
3591cctx_stacksize (int new_stacksize = 0)
3592 PROTOTYPE: ;$
3593 CODE:
3594 RETVAL = cctx_stacksize;
3595 if (new_stacksize)
3596 {
3597 cctx_stacksize = new_stacksize;
3598 ++cctx_gen;
3599 }
3600 OUTPUT:
3601 RETVAL
3602
3603int
3604cctx_max_idle (int max_idle = 0)
3605 PROTOTYPE: ;$
3606 CODE:
3607 RETVAL = cctx_max_idle;
3608 if (max_idle > 1)
3609 cctx_max_idle = max_idle;
3610 OUTPUT:
3611 RETVAL
3612
3613int
3614cctx_count ()
3615 PROTOTYPE:
3616 CODE:
3617 RETVAL = cctx_count;
3618 OUTPUT:
3619 RETVAL
3620
3621int
3622cctx_idle ()
3623 PROTOTYPE:
3624 CODE:
3625 RETVAL = cctx_idle;
3626 OUTPUT:
3627 RETVAL
3628
3629void
3630list ()
3631 PROTOTYPE:
3632 PPCODE:
3633{
3634 struct coro *coro;
3635 for (coro = coro_first; coro; coro = coro->next)
3636 if (coro->hv)
3637 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3638}
3639
3640void
3641call (Coro::State coro, SV *coderef)
3642 ALIAS:
3643 eval = 1
3644 CODE:
3645{
3646 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3647 {
3648 struct coro *current = SvSTATE_current;
3649 struct CoroSLF slf_save;
3650
3651 if (current != coro)
3652 {
3653 PUTBACK;
3654 save_perl (aTHX_ current);
3655 load_perl (aTHX_ coro);
3656 /* the coro is most likely in an active SLF call.
3657 * while not strictly required (the code we execute is
3658 * not allowed to call any SLF functions), it's cleaner
3659 * to reinitialise the slf_frame and restore it later.
3660 * This might one day allow us to actually do SLF calls
3661 * from code executed here.
3662 */
3663 slf_save = slf_frame;
3664 slf_frame.prepare = 0;
3665 SPAGAIN;
3666 }
3667
3668 PUSHSTACK;
3669
3670 PUSHMARK (SP);
3671 PUTBACK;
3672
3673 if (ix)
3674 eval_sv (coderef, 0);
3675 else
3676 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3677
3678 POPSTACK;
3679 SPAGAIN;
3680
3681 if (current != coro)
3682 {
3683 PUTBACK;
3684 slf_frame = slf_save;
3685 save_perl (aTHX_ coro);
3686 load_perl (aTHX_ current);
3687 SPAGAIN;
3688 }
3689 }
3690}
3691
3692SV *
3693is_ready (Coro::State coro)
3694 PROTOTYPE: $
3695 ALIAS:
3696 is_ready = CF_READY
3697 is_running = CF_RUNNING
3698 is_new = CF_NEW
3699 is_destroyed = CF_ZOMBIE
3700 is_zombie = CF_ZOMBIE
3701 is_suspended = CF_SUSPENDED
3702 CODE:
3703 RETVAL = boolSV (coro->flags & ix);
3704 OUTPUT:
3705 RETVAL
3706
3707void
3708throw (SV *self, SV *exception = &PL_sv_undef)
3709 PROTOTYPE: $;$
920 CODE: 3710 CODE:
921 Coro__State coro; 3711{
3712 struct coro *coro = SvSTATE (self);
3713 struct coro *current = SvSTATE_current;
3714 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3715 SvREFCNT_dec (*exceptionp);
3716 SvGETMAGIC (exception);
3717 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
922 3718
923 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3719 api_ready (aTHX_ self);
924 croak ("Coro::State::_newprocess expects an arrayref"); 3720}
3721
3722void
3723api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3724 PROTOTYPE: $;$
3725 C_ARGS: aTHX_ coro, flags
3726
3727SV *
3728has_cctx (Coro::State coro)
3729 PROTOTYPE: $
3730 CODE:
3731 /* maybe manage the running flag differently */
3732 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3733 OUTPUT:
3734 RETVAL
3735
3736int
3737is_traced (Coro::State coro)
3738 PROTOTYPE: $
3739 CODE:
3740 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3741 OUTPUT:
3742 RETVAL
3743
3744UV
3745rss (Coro::State coro)
3746 PROTOTYPE: $
3747 ALIAS:
3748 usecount = 1
3749 CODE:
3750 switch (ix)
3751 {
3752 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3753 case 1: RETVAL = coro->usecount; break;
925 3754 }
926 New (0, coro, 1, struct coro); 3755 OUTPUT:
927
928 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
929 coro->mainstack = 0; /* actual work is done inside transfer */
930 coro->stack = 0;
931
932 RETVAL = coro; 3756 RETVAL
3757
3758void
3759force_cctx ()
3760 PROTOTYPE:
3761 CODE:
3762 cctx_current->idle_sp = 0;
3763
3764void
3765swap_defsv (Coro::State self)
3766 PROTOTYPE: $
3767 ALIAS:
3768 swap_defav = 1
3769 CODE:
3770 if (!self->slot)
3771 croak ("cannot swap state with coroutine that has no saved state,");
3772 else
3773 {
3774 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3775 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3776
3777 SV *tmp = *src; *src = *dst; *dst = tmp;
3778 }
3779
3780void
3781cancel (Coro::State self)
3782 CODE:
3783 coro_state_destroy (aTHX_ self);
3784
3785SV *
3786enable_times (int enabled = enable_times)
3787 CODE:
3788{
3789 RETVAL = boolSV (enable_times);
3790
3791 if (enabled != enable_times)
3792 {
3793 enable_times = enabled;
3794
3795 coro_times_update ();
3796 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3797 }
3798}
933 OUTPUT: 3799 OUTPUT:
934 RETVAL 3800 RETVAL
935 3801
936void 3802void
937transfer(prev, next, flags) 3803times (Coro::State self)
938 SV *prev 3804 PPCODE:
939 SV *next 3805{
940 int flags 3806 struct coro *current = SvSTATE (coro_current);
941 PROTOTYPE: @ 3807
3808 if (ecb_expect_false (current == self))
3809 {
3810 coro_times_update ();
3811 coro_times_add (SvSTATE (coro_current));
3812 }
3813
3814 EXTEND (SP, 2);
3815 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3816 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3817
3818 if (ecb_expect_false (current == self))
3819 coro_times_sub (SvSTATE (coro_current));
3820}
3821
3822void
3823swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3824 CODE:
3825{
3826 struct coro *current = SvSTATE_current;
3827
3828 if (current == coro)
3829 SWAP_SVS (current);
3830
3831 if (!coro->swap_sv)
3832 coro->swap_sv = newAV ();
3833
3834 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3835 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3836
3837 if (current == coro)
3838 SWAP_SVS (current);
3839}
3840
3841
3842MODULE = Coro::State PACKAGE = Coro
3843
3844BOOT:
3845{
3846 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3847 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3848 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3849 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3850 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3851 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3852 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3853 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3854
3855 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3856 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3857 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3858 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3859
3860 coro_stash = gv_stashpv ("Coro", TRUE);
3861
3862 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3863 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3864 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3865 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3866 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3867 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3868
3869 {
3870 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3871
3872 coroapi.schedule = api_schedule;
3873 coroapi.schedule_to = api_schedule_to;
3874 coroapi.cede = api_cede;
3875 coroapi.cede_notself = api_cede_notself;
3876 coroapi.ready = api_ready;
3877 coroapi.is_ready = api_is_ready;
3878 coroapi.nready = coro_nready;
3879 coroapi.current = coro_current;
3880
3881 /*GCoroAPI = &coroapi;*/
3882 sv_setiv (sv, (IV)&coroapi);
3883 SvREADONLY_on (sv);
3884 }
3885}
3886
3887SV *
3888async (...)
3889 PROTOTYPE: &@
942 CODE: 3890 CODE:
943 PUTBACK; 3891 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
944 SV_CORO (next, "Coro::transfer"); 3892 api_ready (aTHX_ RETVAL);
945 SV_CORO (prev, "Coro::transfer"); 3893 OUTPUT:
946 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3894 RETVAL
947 SPAGAIN;
948 3895
949void 3896void
950DESTROY(coro) 3897_destroy (Coro::State coro)
951 Coro::State coro 3898 CODE:
952 CODE: 3899 /* used by the manager thread */
953 3900 coro_state_destroy (aTHX_ coro);
954 if (coro->mainstack && coro->mainstack != main_mainstack)
955 {
956 struct coro temp;
957
958 PUTBACK;
959 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
960 LOAD(aTHX_ coro);
961 SPAGAIN;
962
963 destroy_stacks (aTHX);
964
965 LOAD((&temp)); /* this will get rid of defsv etc.. */
966 SPAGAIN;
967
968 coro->mainstack = 0;
969 }
970
971 deallocate_stack (coro);
972
973 Safefree (coro);
974 3901
975void 3902void
976flush() 3903on_destroy (Coro::State coro, SV *cb)
977 CODE: 3904 CODE:
978#ifdef MAY_FLUSH 3905 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
979 flush_padlist_cache ();
980#endif
981 3906
982void 3907void
983_exit(code) 3908join (...)
984 int code 3909 CODE:
3910 CORO_EXECUTE_SLF_XS (slf_init_join);
3911
3912void
3913terminate (...)
3914 CODE:
3915 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3916
3917void
3918cancel (...)
3919 CODE:
3920 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3921
3922int
3923safe_cancel (Coro::State self, ...)
3924 C_ARGS: aTHX_ self, &ST (1), items - 1
3925
3926void
3927schedule (...)
3928 CODE:
3929 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3930
3931void
3932schedule_to (...)
3933 CODE:
3934 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3935
3936void
3937cede_to (...)
3938 CODE:
3939 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3940
3941void
3942cede (...)
3943 CODE:
3944 CORO_EXECUTE_SLF_XS (slf_init_cede);
3945
3946void
3947cede_notself (...)
3948 CODE:
3949 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3950
3951void
3952_set_current (SV *current)
985 PROTOTYPE: $ 3953 PROTOTYPE: $
986 CODE: 3954 CODE:
987#if defined(__GLIBC__) || _POSIX_C_SOURCE 3955 SvREFCNT_dec (SvRV (coro_current));
988 _exit (code); 3956 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
989#else
990 signal (SIGTERM, SIG_DFL);
991 raise (SIGTERM);
992 exit (code);
993#endif
994
995MODULE = Coro::State PACKAGE = Coro::Cont
996
997# this is slightly dirty (should expose a c-level api)
998 3957
999void 3958void
1000yield(...) 3959_set_readyhook (SV *hook)
1001 PROTOTYPE: @ 3960 PROTOTYPE: $
1002 CODE: 3961 CODE:
1003 static SV *returnstk;
1004 SV *sv;
1005 AV *defav = GvAV (PL_defgv);
1006 struct coro *prev, *next;
1007
1008 if (!returnstk)
1009 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011 /* set up @_ -- ugly */
1012 av_clear (defav);
1013 av_fill (defav, items - 1);
1014 while (items--)
1015 av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018 sv = av_pop ((AV *)SvRV (returnstk));
1019 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1020 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1021 SvREFCNT_dec (sv); 3962 SvREFCNT_dec (coro_readyhook);
1022 3963 SvGETMAGIC (hook);
1023 transfer(aTHX_ prev, next, 0); 3964 if (SvOK (hook))
1024 3965 {
1025MODULE = Coro::State PACKAGE = Coro
1026
1027# this is slightly dirty (should expose a c-level api)
1028
1029BOOT:
1030{
1031 int i;
1032 HV *stash = gv_stashpv ("Coro", TRUE);
1033
1034 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040
1041 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1042 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1043
1044 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045 coro_ready[i] = newAV (); 3966 coro_readyhook = newSVsv (hook);
1046 3967 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1047 {
1048 SV *sv = perl_get_sv("Coro::API", 1);
1049
1050 coroapi.schedule = api_schedule;
1051 coroapi.cede = api_cede;
1052 coroapi.ready = api_ready;
1053 coroapi.nready = &coro_nready;
1054 coroapi.current = coro_current;
1055
1056 GCoroAPI = &coroapi;
1057 sv_setiv(sv, (IV)&coroapi);
1058 SvREADONLY_on(sv);
1059 } 3968 }
1060} 3969 else
3970 {
3971 coro_readyhook = 0;
3972 CORO_READYHOOK = 0;
3973 }
1061 3974
1062void 3975int
3976prio (Coro::State coro, int newprio = 0)
3977 PROTOTYPE: $;$
3978 ALIAS:
3979 nice = 1
3980 CODE:
3981{
3982 RETVAL = coro->prio;
3983
3984 if (items > 1)
3985 {
3986 if (ix)
3987 newprio = coro->prio - newprio;
3988
3989 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3990 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3991
3992 coro->prio = newprio;
3993 }
3994}
3995 OUTPUT:
3996 RETVAL
3997
3998SV *
1063ready(self) 3999ready (SV *self)
1064 SV * self
1065 PROTOTYPE: $ 4000 PROTOTYPE: $
1066 CODE: 4001 CODE:
1067 api_ready (self); 4002 RETVAL = boolSV (api_ready (aTHX_ self));
4003 OUTPUT:
4004 RETVAL
1068 4005
1069int 4006int
1070nready(...) 4007nready (...)
1071 PROTOTYPE: 4008 PROTOTYPE:
1072 CODE: 4009 CODE:
1073 RETVAL = coro_nready; 4010 RETVAL = coro_nready;
1074 OUTPUT: 4011 OUTPUT:
1075 RETVAL 4012 RETVAL
1076 4013
1077void 4014void
1078schedule(...) 4015suspend (Coro::State self)
1079 PROTOTYPE: 4016 PROTOTYPE: $
1080 CODE: 4017 CODE:
1081 api_schedule (); 4018 self->flags |= CF_SUSPENDED;
1082 4019
1083void 4020void
1084cede(...) 4021resume (Coro::State self)
1085 PROTOTYPE: 4022 PROTOTYPE: $
1086 CODE: 4023 CODE:
4024 self->flags &= ~CF_SUSPENDED;
4025
4026void
4027_pool_handler (...)
4028 CODE:
4029 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4030
4031void
4032async_pool (SV *cv, ...)
4033 PROTOTYPE: &@
4034 PPCODE:
4035{
4036 HV *hv = (HV *)av_pop (av_async_pool);
4037 AV *av = newAV ();
4038 SV *cb = ST (0);
4039 int i;
4040
4041 av_extend (av, items - 2);
4042 for (i = 1; i < items; ++i)
4043 av_push (av, SvREFCNT_inc_NN (ST (i)));
4044
4045 if ((SV *)hv == &PL_sv_undef)
4046 {
4047 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4048 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4049 SvREFCNT_dec (sv);
4050 }
4051
4052 {
4053 struct coro *coro = SvSTATE_hv (hv);
4054
4055 assert (!coro->invoke_cb);
4056 assert (!coro->invoke_av);
4057 coro->invoke_cb = SvREFCNT_inc (cb);
4058 coro->invoke_av = av;
4059 }
4060
4061 api_ready (aTHX_ (SV *)hv);
4062
4063 if (GIMME_V != G_VOID)
4064 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4065 else
4066 SvREFCNT_dec (hv);
4067}
4068
4069SV *
4070rouse_cb ()
4071 PROTOTYPE:
4072 CODE:
4073 RETVAL = coro_new_rouse_cb (aTHX);
4074 OUTPUT:
4075 RETVAL
4076
4077void
4078rouse_wait (...)
4079 PROTOTYPE: ;$
4080 PPCODE:
4081 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4082
4083void
4084on_enter (SV *block)
4085 ALIAS:
4086 on_leave = 1
4087 PROTOTYPE: &
4088 CODE:
4089{
4090 struct coro *coro = SvSTATE_current;
4091 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4092
4093 block = s_get_cv_croak (block);
4094
4095 if (!*avp)
4096 *avp = newAV ();
4097
4098 av_push (*avp, SvREFCNT_inc (block));
4099
4100 if (!ix)
4101 on_enterleave_call (aTHX_ block);
4102
4103 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4104 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4105 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4106}
4107
4108
4109MODULE = Coro::State PACKAGE = PerlIO::cede
4110
4111BOOT:
4112 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4113
4114
4115MODULE = Coro::State PACKAGE = Coro::Semaphore
4116
4117SV *
4118new (SV *klass, SV *count = 0)
4119 CODE:
4120{
4121 int semcnt = 1;
4122
4123 if (count)
4124 {
4125 SvGETMAGIC (count);
4126
4127 if (SvOK (count))
4128 semcnt = SvIV (count);
4129 }
4130
4131 RETVAL = sv_bless (
4132 coro_waitarray_new (aTHX_ semcnt),
4133 GvSTASH (CvGV (cv))
4134 );
4135}
4136 OUTPUT:
4137 RETVAL
4138
4139# helper for Coro::Channel and others
4140SV *
4141_alloc (int count)
4142 CODE:
4143 RETVAL = coro_waitarray_new (aTHX_ count);
4144 OUTPUT:
4145 RETVAL
4146
4147SV *
4148count (SV *self)
4149 CODE:
4150 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4151 OUTPUT:
4152 RETVAL
4153
4154void
4155up (SV *self, int adjust = 1)
4156 ALIAS:
4157 adjust = 1
4158 CODE:
4159 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4160
4161void
4162down (...)
4163 CODE:
4164 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4165
4166void
4167wait (...)
4168 CODE:
4169 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4170
4171void
4172try (SV *self)
4173 PPCODE:
4174{
4175 AV *av = (AV *)SvRV (self);
4176 SV *count_sv = AvARRAY (av)[0];
4177 IV count = SvIVX (count_sv);
4178
4179 if (count > 0)
4180 {
4181 --count;
4182 SvIVX (count_sv) = count;
4183 XSRETURN_YES;
4184 }
4185 else
4186 XSRETURN_NO;
4187}
4188
4189void
4190waiters (SV *self)
4191 PPCODE:
4192{
4193 AV *av = (AV *)SvRV (self);
4194 int wcount = AvFILLp (av) + 1 - 1;
4195
4196 if (GIMME_V == G_SCALAR)
4197 XPUSHs (sv_2mortal (newSViv (wcount)));
4198 else
4199 {
4200 int i;
4201 EXTEND (SP, wcount);
4202 for (i = 1; i <= wcount; ++i)
4203 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
4204 }
4205}
4206
4207MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4208
4209void
4210_may_delete (SV *sem, int count, unsigned int extra_refs)
4211 PPCODE:
4212{
4213 AV *av = (AV *)SvRV (sem);
4214
4215 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4216 && AvFILLp (av) == 0 /* no waiters, just count */
4217 && SvIV (AvARRAY (av)[0]) == count)
4218 XSRETURN_YES;
4219
4220 XSRETURN_NO;
4221}
4222
4223MODULE = Coro::State PACKAGE = Coro::Signal
4224
4225SV *
4226new (SV *klass)
4227 CODE:
4228 RETVAL = sv_bless (
4229 coro_waitarray_new (aTHX_ 0),
4230 GvSTASH (CvGV (cv))
4231 );
4232 OUTPUT:
4233 RETVAL
4234
4235void
4236wait (...)
4237 CODE:
4238 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4239
4240void
4241broadcast (SV *self)
4242 CODE:
4243{
4244 AV *av = (AV *)SvRV (self);
4245 coro_signal_wake (aTHX_ av, AvFILLp (av));
4246}
4247
4248void
4249send (SV *self)
4250 CODE:
4251{
4252 AV *av = (AV *)SvRV (self);
4253
4254 if (AvFILLp (av))
4255 coro_signal_wake (aTHX_ av, 1);
4256 else
4257 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4258}
4259
4260IV
4261awaited (SV *self)
4262 CODE:
4263 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4264 OUTPUT:
4265 RETVAL
4266
4267
4268MODULE = Coro::State PACKAGE = Coro::AnyEvent
4269
4270BOOT:
4271 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4272
4273void
4274_schedule (...)
4275 CODE:
4276{
4277 static int incede;
4278
1087 api_cede (); 4279 api_cede_notself (aTHX);
1088 4280
4281 ++incede;
4282 while (coro_nready >= incede && api_cede (aTHX))
4283 ;
4284
4285 sv_setsv (sv_activity, &PL_sv_undef);
4286 if (coro_nready >= incede)
4287 {
4288 PUSHMARK (SP);
4289 PUTBACK;
4290 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4291 }
4292
4293 --incede;
4294}
4295
4296
4297MODULE = Coro::State PACKAGE = Coro::AIO
4298
4299void
4300_register (char *target, char *proto, SV *req)
4301 CODE:
4302{
4303 SV *req_cv = s_get_cv_croak (req);
4304 /* newXSproto doesn't return the CV on 5.8 */
4305 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4306 sv_setpv ((SV *)slf_cv, proto);
4307 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4308}
4309
4310MODULE = Coro::State PACKAGE = Coro::Select
4311
4312void
4313patch_pp_sselect ()
4314 CODE:
4315 if (!coro_old_pp_sselect)
4316 {
4317 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4318 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4319 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4320 }
4321
4322void
4323unpatch_pp_sselect ()
4324 CODE:
4325 if (coro_old_pp_sselect)
4326 {
4327 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4328 coro_old_pp_sselect = 0;
4329 }
4330

Diff Legend

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