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Comparing Coro/Coro/State.xs (file contents):
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC vs.
Revision 1.468 by root, Sat Oct 29 19:12:46 2016 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1 /* perl usually disables NDEBUG later */
5
1#include "libcoro/coro.c" 6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
2 10
3#include "EXTERN.h" 11#include "EXTERN.h"
4#include "perl.h" 12#include "perl.h"
5#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
6 15
7#include "patchlevel.h" 16#include "schmorp.h"
8 17
9#if USE_VALGRIND 18#define ECB_NO_THREADS 1
10# include <valgrind/valgrind.h> 19#define ECB_NO_LIBM 1
11#endif 20#include "ecb.h"
12 21
13#define PERL_VERSION_ATLEAST(a,b,c) \ 22#include <stddef.h>
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39
40#include <stdio.h> 23#include <stdio.h>
41#include <errno.h> 24#include <errno.h>
42
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h> 25#include <assert.h>
53# include <sys/mman.h> 26
54# ifndef MAP_ANONYMOUS 27#ifndef SvREFCNT_dec_NN
55# ifdef MAP_ANON 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif 29#endif
30
31#ifndef SvREFCNT_inc_NN
32 #define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
33#endif
34
35#ifndef SVs_PADSTALE
36# define SVs_PADSTALE 0
37#endif
38
39#ifdef PadARRAY
40# define NEWPADAPI 1
41# define newPADLIST(var) (Newz (0, var, 1, PADLIST), Newx (PadlistARRAY (var), 2, PAD *))
42#else
43typedef AV PADNAMELIST;
44# if !PERL_VERSION_ATLEAST(5,8,0)
45typedef AV PADLIST;
46typedef AV PAD;
60# endif 47# endif
61# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
62# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
63# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
65static long pagesize; 52# define PadMAX AvFILLp
53# define newPADLIST(var) ((var) = newAV (), av_extend (var, 1))
54#endif
55#ifndef PadnamelistREFCNT
56# define PadnamelistREFCNT(pnl) SvREFCNT (pnl)
57#endif
58#ifndef PadnamelistREFCNT_dec
59# define PadnamelistREFCNT_dec(pnl) SvREFCNT_dec (pnl)
60#endif
61
62/* 5.19.something has replaced SVt_BIND by SVt_INVLIST */
63/* we just alias it to SVt_IV, as that is sufficient for swap_sv for now */
64#if PERL_VERSION_ATLEAST(5,19,0)
65# define SVt_BIND SVt_IV
66#endif
67
68#if defined(_WIN32)
69# undef HAS_GETTIMEOFDAY
70# undef setjmp
71# undef longjmp
72# undef _exit
73# define setjmp _setjmp /* deep magic */
66# else 74#else
67# define BOOT_PAGESIZE 75# include <inttypes.h> /* most portable stdint.h */
76#endif
77
78/* the maximum number of idle cctx that will be pooled */
79static int cctx_max_idle = 4;
80
81#if defined(DEBUGGING) && PERL_VERSION_ATLEAST(5,12,0)
82# define HAS_SCOPESTACK_NAME 1
83#endif
84
85/* prefer perl internal functions over our own? */
86#ifndef CORO_PREFER_PERL_FUNCTIONS
87# define CORO_PREFER_PERL_FUNCTIONS 0
88#endif
89
90/* The next macros try to return the current stack pointer, in an as
91 * portable way as possible. */
92#if __GNUC__ >= 4
93# define dSTACKLEVEL int stacklevel_dummy
94# define STACKLEVEL __builtin_frame_address (0)
95#else
96# define dSTACKLEVEL volatile void *stacklevel
97# define STACKLEVEL ((void *)&stacklevel)
98#endif
99
100#define IN_DESTRUCT PL_dirty
101
102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
68# endif 108# endif
69#endif 109#endif
70 110
71/* The next macro should declare a variable stacklevel that contains and approximation 111#ifdef __linux
72 * to the current C stack pointer. Its property is that it changes with each call 112# include <time.h> /* for timespec */
73 * and should be unique. */ 113# include <syscall.h> /* for SYS_* */
74#define dSTACKLEVEL int stacklevel 114# ifdef SYS_clock_gettime
75#define STACKLEVEL ((void *)&stacklevel) 115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
76 116# define CORO_CLOCK_MONOTONIC 1
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
78
79#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x)
81#else
82# define attribute(x)
83#endif 118# endif
84
85#define NOINLINE attribute ((noinline))
86
87#include "CoroAPI.h"
88
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90
91#ifdef USE_ITHREADS
92static perl_mutex coro_mutex;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else
96# define LOCK (void)0
97# define UNLOCK (void)0
98#endif 119#endif
99 120
121/* perl usually suppressed asserts. for debugging, we sometimes force it to be on */
122#if 0
123# undef NDEBUG
124# include <assert.h>
125#endif
126
127static double (*nvtime)(); /* so why doesn't it take void? */
128static void (*u2time)(pTHX_ UV ret[2]);
129
130/* we hijack an hopefully unused CV flag for our purposes */
131#define CVf_SLF 0x4000
132static OP *pp_slf (pTHX);
133static void slf_destroy (pTHX_ struct coro *coro);
134
135static U32 cctx_gen;
136static size_t cctx_stacksize = CORO_STACKSIZE;
100static struct CoroAPI coroapi; 137static struct CoroAPI coroapi;
101static AV *main_mainstack; /* used to differentiate between $main and others */ 138static AV *main_mainstack; /* used to differentiate between $main and others */
139static JMPENV *main_top_env;
102static HV *coro_state_stash, *coro_stash; 140static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 141static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
142
143static AV *av_destroy; /* destruction queue */
144static SV *sv_manager; /* the manager coro */
145static SV *sv_idle; /* $Coro::idle */
146
147static GV *irsgv; /* $/ */
148static GV *stdoutgv; /* *STDOUT */
149static SV *rv_diehook;
150static SV *rv_warnhook;
151
152/* async_pool helper stuff */
153static SV *sv_pool_rss;
154static SV *sv_pool_size;
155static SV *sv_async_pool_idle; /* description string */
156static AV *av_async_pool; /* idle pool */
157static SV *sv_Coro; /* class string */
158static CV *cv_pool_handler;
159
160/* Coro::AnyEvent */
161static SV *sv_activity;
162
163/* enable processtime/realtime profiling */
164static char enable_times;
165typedef U32 coro_ts[2];
166static coro_ts time_real, time_cpu;
167static char times_valid;
168
169static struct coro_cctx *cctx_first;
170static int cctx_count, cctx_idle;
171
172enum
173{
174 CC_MAPPED = 0x01,
175 CC_NOREUSE = 0x02, /* throw this away after tracing */
176 CC_TRACE = 0x04,
177 CC_TRACE_SUB = 0x08, /* trace sub calls */
178 CC_TRACE_LINE = 0x10, /* trace each statement */
179 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
180};
104 181
105/* this is a structure representing a c-level coroutine */ 182/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 183typedef struct coro_cctx
184{
107 struct coro_stack *next; 185 struct coro_cctx *next;
108 186
109 /* the stack */ 187 /* the stack */
110 void *sptr; 188 struct coro_stack stack;
111 long ssize; /* positive == mmap, otherwise malloc */
112 189
113 /* cpu state */ 190 /* cpu state */
114 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 191 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
192#ifndef NDEBUG
193 JMPENV *idle_te; /* same as idle_sp, but for top_env */
194#endif
115 JMPENV *top_env; 195 JMPENV *top_env;
116 coro_context cctx; 196 coro_context cctx;
117 197
198 U32 gen;
118#if USE_VALGRIND 199#if CORO_USE_VALGRIND
119 int valgrind_id; 200 int valgrind_id;
120#endif 201#endif
121} coro_stack; 202 unsigned char flags;
203} coro_cctx;
204
205static coro_cctx *cctx_current; /* the currently running cctx */
206
207/*****************************************************************************/
208
209static MGVTBL coro_state_vtbl;
210
211enum
212{
213 CF_RUNNING = 0x0001, /* coroutine is running */
214 CF_READY = 0x0002, /* coroutine is ready */
215 CF_NEW = 0x0004, /* has never been switched to */
216 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
217 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
218 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct
223{
224 #define VARx(name,expr,type) type name;
225 #include "state.h"
226} perl_slots;
227
228/* how many context stack entries do we need for perl_slots */
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122 230
123/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
124struct coro { 232struct coro
233{
125 /* the c coroutine allocated to this perl coroutine, if any */ 234 /* the C coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 235 coro_cctx *cctx;
127 236
128 /* data associated with this coroutine (initial args) */ 237 /* ready queue */
129 AV *args; 238 struct coro *next_ready;
130 int refcnt;
131 239
132 /* optionally saved, might be zero */ 240 /* state data */
133 AV *defav; 241 struct CoroSLF slf_frame; /* saved slf frame */
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 242 AV *mainstack;
145 SV **stack_sp; 243 perl_slots *slot; /* basically the saved sp */
146 OP *op; 244
147 SV **curpad; 245 CV *startcv; /* the CV to execute */
148 AV *comppad; 246 AV *args; /* data associated with this coroutine (initial args) */
149 CV *compcv; 247 int flags; /* CF_ flags */
150 SV **stack_base; 248 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 249
152 SV **tmps_stack; 250 /* statistics */
153 I32 tmps_floor; 251 int usecount; /* number of transfers to this coro */
154 I32 tmps_ix;
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 252
171 /* coro process data */ 253 /* coro process data */
172 int prio; 254 int prio;
255 SV *except; /* exception to be thrown */
256 SV *rouse_cb; /* last rouse callback */
257 AV *on_destroy; /* callbacks or coros to notify on destroy */
258 AV *status; /* the exit status list */
259
260 /* async_pool */
261 SV *saved_deffh;
262 SV *invoke_cb;
263 AV *invoke_av;
264
265 /* on_enter/on_leave */
266 AV *on_enter; AV *on_enter_xs;
267 AV *on_leave; AV *on_leave_xs;
268
269 /* swap_sv */
270 AV *swap_sv;
271
272 /* times */
273 coro_ts t_cpu, t_real;
274
275 /* linked list */
276 struct coro *next, *prev;
173}; 277};
174 278
175typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
177 281
282/* the following variables are effectively part of the perl context */
283/* and get copied between struct coro and these variables */
284/* the main reason we don't support windows process emulation */
285static struct CoroSLF slf_frame; /* the current slf frame */
286
287/** Coro ********************************************************************/
288
289#define CORO_PRIO_MAX 3
290#define CORO_PRIO_HIGH 1
291#define CORO_PRIO_NORMAL 0
292#define CORO_PRIO_LOW -1
293#define CORO_PRIO_IDLE -3
294#define CORO_PRIO_MIN -4
295
296/* for Coro.pm */
297static SV *coro_current;
298static SV *coro_readyhook;
299static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
300static CV *cv_coro_run;
301static struct coro *coro_first;
302#define coro_nready coroapi.nready
303
304/** JIT *********************************************************************/
305
306#if CORO_JIT
307 /* APPLE doesn't have mmap though */
308 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
309 #ifndef CORO_JIT_TYPE
310 #if ECB_AMD64 && CORO_JIT_UNIXY
311 #define CORO_JIT_TYPE "amd64-unix"
312 #elif __i386 && CORO_JIT_UNIXY
313 #define CORO_JIT_TYPE "x86-unix"
314 #endif
315 #endif
316#endif
317
318#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
319 #undef CORO_JIT
320#endif
321
322#if CORO_JIT
323 typedef void (*load_save_perl_slots_type)(perl_slots *);
324 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
325#endif
326
327/** Coro::Select ************************************************************/
328
329static OP *(*coro_old_pp_sselect) (pTHX);
330static SV *coro_select_select;
331
332/* horrible hack, but if it works... */
178static AV * 333static OP *
334coro_pp_sselect (pTHX)
335{
336 dSP;
337 PUSHMARK (SP - 4); /* fake argument list */
338 XPUSHs (coro_select_select);
339 PUTBACK;
340
341 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
342 PL_op->op_flags |= OPf_STACKED;
343 PL_op->op_private = 0;
344 return PL_ppaddr [OP_ENTERSUB](aTHX);
345}
346
347/** time stuff **************************************************************/
348
349#ifdef HAS_GETTIMEOFDAY
350
351ecb_inline void
352coro_u2time (pTHX_ UV ret[2])
353{
354 struct timeval tv;
355 gettimeofday (&tv, 0);
356
357 ret [0] = tv.tv_sec;
358 ret [1] = tv.tv_usec;
359}
360
361ecb_inline double
362coro_nvtime (void)
363{
364 struct timeval tv;
365 gettimeofday (&tv, 0);
366
367 return tv.tv_sec + tv.tv_usec * 1e-6;
368}
369
370ecb_inline void
371time_init (pTHX)
372{
373 nvtime = coro_nvtime;
374 u2time = coro_u2time;
375}
376
377#else
378
379ecb_inline void
380time_init (pTHX)
381{
382 SV **svp;
383
384 require_pv ("Time/HiRes.pm");
385
386 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
387
388 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
389 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
390
391 nvtime = INT2PTR (double (*)(), SvIV (*svp));
392
393 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
394 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
395}
396
397#endif
398
399/** lowlevel stuff **********************************************************/
400
401static SV * ecb_noinline
402coro_get_sv (pTHX_ const char *name, int create)
403{
404#if PERL_VERSION_ATLEAST (5,10,0)
405 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
406 get_sv (name, create);
407#endif
408 return get_sv (name, create);
409}
410
411static AV * ecb_noinline
412coro_get_av (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_av (name, create);
417#endif
418 return get_av (name, create);
419}
420
421static HV * ecb_noinline
422coro_get_hv (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_hv (name, create);
427#endif
428 return get_hv (name, create);
429}
430
431ecb_inline void
432coro_times_update (void)
433{
434#ifdef coro_clock_gettime
435 struct timespec ts;
436
437 ts.tv_sec = ts.tv_nsec = 0;
438 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
439 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
440
441 ts.tv_sec = ts.tv_nsec = 0;
442 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
443 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
444#else
445 dTHX;
446 UV tv[2];
447
448 u2time (aTHX_ tv);
449 time_real [0] = tv [0];
450 time_real [1] = tv [1] * 1000;
451#endif
452}
453
454ecb_inline void
455coro_times_add (struct coro *c)
456{
457 c->t_real [1] += time_real [1];
458 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
459 c->t_real [0] += time_real [0];
460
461 c->t_cpu [1] += time_cpu [1];
462 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
463 c->t_cpu [0] += time_cpu [0];
464}
465
466ecb_inline void
467coro_times_sub (struct coro *c)
468{
469 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
470 c->t_real [1] -= time_real [1];
471 c->t_real [0] -= time_real [0];
472
473 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
474 c->t_cpu [1] -= time_cpu [1];
475 c->t_cpu [0] -= time_cpu [0];
476}
477
478/*****************************************************************************/
479/* magic glue */
480
481#define CORO_MAGIC_type_cv 26
482#define CORO_MAGIC_type_state PERL_MAGIC_ext
483
484#define CORO_MAGIC_NN(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
486 ? SvMAGIC (sv) \
487 : mg_find (sv, type))
488
489#define CORO_MAGIC(sv, type) \
490 (ecb_expect_true (SvMAGIC (sv)) \
491 ? CORO_MAGIC_NN (sv, type) \
492 : 0)
493
494#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
495#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
496
497ecb_inline MAGIC *
498SvSTATEhv_p (pTHX_ SV *coro)
499{
500 MAGIC *mg;
501
502 if (ecb_expect_true (
503 SvTYPE (coro) == SVt_PVHV
504 && (mg = CORO_MAGIC_state (coro))
505 && mg->mg_virtual == &coro_state_vtbl
506 ))
507 return mg;
508
509 return 0;
510}
511
512ecb_inline struct coro *
513SvSTATE_ (pTHX_ SV *coro_sv)
514{
515 MAGIC *mg;
516
517 if (SvROK (coro_sv))
518 coro_sv = SvRV (coro_sv);
519
520 mg = SvSTATEhv_p (aTHX_ coro_sv);
521 if (!mg)
522 croak ("Coro::State object required");
523
524 return (struct coro *)mg->mg_ptr;
525}
526
527#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
528
529/* faster than SvSTATE, but expects a coroutine hv */
530#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
531#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
532
533/*****************************************************************************/
534/* padlist management and caching */
535
536ecb_inline PADLIST *
179coro_clone_padlist (CV *cv) 537coro_derive_padlist (pTHX_ CV *cv)
180{ 538{
181 AV *padlist = CvPADLIST (cv); 539 PADLIST *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 540 PADLIST *newpadlist;
541 PADNAMELIST *padnames;
542 PAD *newpad;
543 PADOFFSET off = PadlistMAX (padlist) + 1;
183 544
184 newpadlist = newAV (); 545#if NEWPADAPI
546
547 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
548 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
549 while (!PadlistARRAY (padlist)[off - 1])
550 --off;
551
552 Perl_pad_push (aTHX_ padlist, off);
553
554 newpad = PadlistARRAY (padlist)[off];
555 PadlistARRAY (padlist)[off] = 0;
556
557#else
558
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
565 newpad = PadlistARRAY (padlist)[off];
566 PadlistMAX (padlist) = off - 1;
567
568#endif
569
570 newPADLIST (newpadlist);
571#if !PERL_VERSION_ATLEAST(5,15,3)
572 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
185 AvREAL_off (newpadlist); 573 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 574#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist);
193 575
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 576 /* Already extended to 2 elements by newPADLIST. */
195 av_store (newpadlist, 1, (SV *)newpad); 577 PadlistMAX (newpadlist) = 1;
578
579 padnames = PadlistNAMES (padlist);
580 ++PadnamelistREFCNT (padnames);
581 PadlistNAMES (newpadlist) = padnames;
582
583 PadlistARRAY (newpadlist)[1] = newpad;
196 584
197 return newpadlist; 585 return newpadlist;
198} 586}
199 587
200static void 588ecb_inline void
201free_padlist (AV *padlist) 589free_padlist (pTHX_ PADLIST *padlist)
202{ 590{
203 /* may be during global destruction */ 591 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 592 if (!IN_DESTRUCT)
205 { 593 {
206 I32 i = AvFILLp (padlist); 594 I32 i = PadlistMAX (padlist);
207 while (i >= 0) 595
596 while (i > 0) /* special-case index 0 */
208 { 597 {
209 SV **svp = av_fetch (padlist, i--, FALSE); 598 /* we try to be extra-careful here */
599 PAD *pad = PadlistARRAY (padlist)[i--];
600
210 if (svp) 601 if (pad)
211 { 602 {
212 SV *sv; 603 I32 j = PadMAX (pad);
213 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 604
605 while (j >= 0)
214 SvREFCNT_dec (sv); 606 SvREFCNT_dec (PadARRAY (pad)[j--]);
215 607
608 PadMAX (pad) = -1;
216 SvREFCNT_dec (*svp); 609 SvREFCNT_dec (pad);
217 } 610 }
218 } 611 }
219 612
613 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
614
615#if NEWPADAPI
616 Safefree (PadlistARRAY (padlist));
617 Safefree (padlist);
618#else
619 AvFILLp (padlist) = -1;
620 AvREAL_off (padlist);
220 SvREFCNT_dec ((SV*)padlist); 621 SvREFCNT_dec ((SV*)padlist);
622#endif
221 } 623 }
222} 624}
223 625
224static int 626static int
225coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 627coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
226{ 628{
227 AV *padlist; 629 PADLIST *padlist;
228 AV *av = (AV *)mg->mg_obj; 630 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
631 size_t len = *(size_t *)mg->mg_ptr;
229 632
230 /* casting is fun. */ 633 /* perl manages to free our internal AV and _then_ call us */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 634 if (IN_DESTRUCT)
635 return 0;
636
637 while (len--)
232 free_padlist (padlist); 638 free_padlist (aTHX_ padlists[len]);
233
234 SvREFCNT_dec (av);
235 639
236 return 0; 640 return 0;
237} 641}
238 642
239#define PERL_MAGIC_coro PERL_MAGIC_ext 643static MGVTBL coro_cv_vtbl = {
240 644 0, 0, 0, 0,
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 645 coro_cv_free
646};
242 647
243/* the next two functions merely cache the padlists */ 648/* the next two functions merely cache the padlists */
244static void 649ecb_inline void
245get_padlist (CV *cv) 650get_padlist (pTHX_ CV *cv)
246{ 651{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 652 MAGIC *mg = CORO_MAGIC_cv (cv);
653 size_t *lenp;
248 654
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 655 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 656 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
251 else 657 else
252 { 658 {
253#if 0 659#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 660 /* this is probably cleaner? but also slower! */
661 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 662 CV *cp = Perl_cv_clone (aTHX_ cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 663 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 664 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 665 SvREFCNT_dec (cp);
259#else 666#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 667 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
261#endif 668#endif
262 } 669 }
263} 670}
264 671
265static void 672ecb_inline void
266put_padlist (CV *cv) 673put_padlist (pTHX_ CV *cv)
267{ 674{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 675 MAGIC *mg = CORO_MAGIC_cv (cv);
269 676
270 if (!mg) 677 if (ecb_expect_false (!mg))
271 {
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 } 678 {
679 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
680 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
681 mg->mg_len = 1; /* so mg_free frees mg_ptr */
682 }
683 else
684 Renew (mg->mg_ptr,
685 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
686 char);
277 687
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 688 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
279} 689}
280 690
281#define SB do { 691/** load & save, init *******************************************************/
282#define SE } while (0)
283 692
284#define LOAD(state) load_state((state)); 693ecb_inline void
285#define SAVE(state,flags) save_state((state),(flags)); 694swap_sv (SV *a, SV *b)
695{
696 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
697 SV tmp;
286 698
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 699 /* swap sv_any */
700 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
288 701
702 /* swap sv_flags */
703 SvFLAGS (&tmp) = SvFLAGS (a);
704 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
705 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
706
707#if PERL_VERSION_ATLEAST (5,10,0)
708 /* perl 5.10 and later complicates this _quite_ a bit, but it also
709 * is much faster, so no quarrels here. alternatively, we could
710 * sv_upgrade to avoid this.
711 */
712 {
713 /* swap sv_u */
714 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
715
716 /* if SvANY points to the head, we need to adjust the pointers,
717 * as the pointer for a still points to b, and maybe vice versa.
718 */
719 U32 svany_in_head_set = (1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV);
720 #if NVSIZE <= IVSIZE && PERL_VERSION_ATLEAST(5,22,0)
721 svany_in_head_set |= 1 << SVt_NV;
722 #endif
723
724 #define svany_in_head(type) (svany_in_head_set & (1 << (type)))
725
726 if (svany_in_head (SvTYPE (a)))
727 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
728
729 if (svany_in_head (SvTYPE (b)))
730 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
731 }
732#endif
733}
734
735/* swap sv heads, at least logically */
289static void 736static void
737swap_svs_enter (pTHX_ Coro__State c)
738{
739 int i;
740
741 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
742 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
743}
744
745static void
746swap_svs_leave (pTHX_ Coro__State c)
747{
748 int i;
749
750 for (i = AvFILLp (c->swap_sv) - 1; i >= 0; i -= 2)
751 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
752}
753
754#define SWAP_SVS_ENTER(coro) \
755 if (ecb_expect_false ((coro)->swap_sv)) \
756 swap_svs_enter (aTHX_ (coro))
757
758#define SWAP_SVS_LEAVE(coro) \
759 if (ecb_expect_false ((coro)->swap_sv)) \
760 swap_svs_leave (aTHX_ (coro))
761
762static void
763on_enterleave_call (pTHX_ SV *cb);
764
765static void
290load_state(Coro__State c) 766load_perl (pTHX_ Coro__State c)
291{ 767{
292 PL_dowarn = c->dowarn; 768 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 769 c->slot = 0;
294 770
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 771 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 772
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 773#if CORO_JIT
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 774 load_perl_slots (slot);
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 775#else
776 #define VARx(name,expr,type) expr = slot->name;
777 #include "state.h"
778#endif
329 779
330 { 780 {
331 dSP; 781 dSP;
782
332 CV *cv; 783 CV *cv;
333 784
334 /* now do the ugly restore mess */ 785 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 786 while (ecb_expect_true (cv = (CV *)POPs))
336 { 787 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 788 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 789 CvDEPTH (cv) = PTR2IV (POPs);
343 } 790 CvPADLIST (cv) = (PADLIST *)POPs;
344
345 ++CvDEPTH(cv);
346 } 791 }
347 792
348 PUTBACK; 793 PUTBACK;
349 } 794 }
350}
351 795
796 slf_frame = c->slf_frame;
797 CORO_THROW = c->except;
798
799 if (ecb_expect_false (enable_times))
800 {
801 if (ecb_expect_false (!times_valid))
802 coro_times_update ();
803
804 coro_times_sub (c);
805 }
806
807 if (ecb_expect_false (c->on_enter))
808 {
809 int i;
810
811 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
812 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
813 }
814
815 if (ecb_expect_false (c->on_enter_xs))
816 {
817 int i;
818
819 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
820 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
821 }
822
823 SWAP_SVS_ENTER (c);
824}
825
352static void 826static void
353save_state(Coro__State c, int flags) 827save_perl (pTHX_ Coro__State c)
354{ 828{
829 SWAP_SVS_LEAVE (c);
830
831 if (ecb_expect_false (c->on_leave_xs))
832 {
833 int i;
834
835 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
836 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
837 }
838
839 if (ecb_expect_false (c->on_leave))
840 {
841 int i;
842
843 for (i = AvFILLp (c->on_leave); i >= 0; --i)
844 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
845 }
846
847 times_valid = 0;
848
849 if (ecb_expect_false (enable_times))
850 {
851 coro_times_update (); times_valid = 1;
852 coro_times_add (c);
853 }
854
855 c->except = CORO_THROW;
856 c->slf_frame = slf_frame;
857
355 { 858 {
356 dSP; 859 dSP;
357 I32 cxix = cxstack_ix; 860 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 861 PERL_CONTEXT *ccstk = cxstack;
359 PERL_SI *top_si = PL_curstackinfo; 862 PERL_SI *top_si = PL_curstackinfo;
… …
361 /* 864 /*
362 * the worst thing you can imagine happens first - we have to save 865 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 866 * (and reinitialize) all cv's in the whole callchain :(
364 */ 867 */
365 868
366 PUSHs (Nullsv); 869 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 870 /* this loop was inspired by pp_caller */
368 for (;;) 871 for (;;)
369 { 872 {
370 while (cxix >= 0) 873 while (ecb_expect_true (cxix >= 0))
371 { 874 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 875 PERL_CONTEXT *cx = &ccstk[cxix--];
373 876
374 if (CxTYPE(cx) == CXt_SUB) 877 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
375 { 878 {
376 CV *cv = cx->blk_sub.cv; 879 CV *cv = cx->blk_sub.cv;
880
377 if (CvDEPTH(cv)) 881 if (ecb_expect_true (CvDEPTH (cv)))
378 { 882 {
379 EXTEND (SP, CvDEPTH(cv)*2); 883 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 884 PUSHs ((SV *)CvPADLIST (cv));
885 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 886 PUSHs ((SV *)cv);
390 887
888 CvDEPTH (cv) = 0;
391 get_padlist (cv); 889 get_padlist (aTHX_ cv);
392 } 890 }
393 } 891 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 892 }
403 893
404 if (top_si->si_type == PERLSI_MAIN) 894 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 895 break;
406 896
407 top_si = top_si->si_prev; 897 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 898 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 899 cxix = top_si->si_cxix;
410 } 900 }
411 901
412 PUTBACK; 902 PUTBACK;
413 } 903 }
414 904
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 905 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 906 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 907 {
908 unsigned int i;
418 909
419 c->dowarn = PL_dowarn; 910 for (i = 0; i < SLOT_COUNT; ++i)
420 c->in_eval = PL_in_eval; 911 CXINC;
421 912
422 c->curstackinfo = PL_curstackinfo; 913 cxstack_ix -= SLOT_COUNT; /* undo allocation */
423 c->curstack = PL_curstack; 914 }
915
424 c->mainstack = PL_mainstack; 916 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 917
426 c->op = PL_op; 918 {
427 c->curpad = PL_curpad; 919 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 920
429 c->compcv = PL_compcv; 921#if CORO_JIT
430 c->stack_base = PL_stack_base; 922 save_perl_slots (slot);
431 c->stack_max = PL_stack_max; 923#else
432 c->tmps_stack = PL_tmps_stack; 924 #define VARx(name,expr,type) slot->name = expr;
433 c->tmps_floor = PL_tmps_floor; 925 #include "state.h"
434 c->tmps_ix = PL_tmps_ix;
435 c->tmps_max = PL_tmps_max;
436 c->markstack = PL_markstack;
437 c->markstack_ptr = PL_markstack_ptr;
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif 926#endif
450 c->curpm = PL_curpm; 927 }
451 c->curcop = PL_curcop;
452} 928}
453 929
454/* 930/*
455 * allocate various perl stacks. This is an exact copy 931 * allocate various perl stacks. This is almost an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 932 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 933 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 934 * not usually need a lot of stackspace.
459 */ 935 */
936#if CORO_PREFER_PERL_FUNCTIONS
937# define coro_init_stacks(thx) init_stacks ()
938#else
460static void 939static void
461coro_init_stacks () 940coro_init_stacks (pTHX)
462{ 941{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 942 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
464 PL_curstackinfo->si_type = PERLSI_MAIN; 943 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 944 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 945 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 946
468 PL_stack_base = AvARRAY(PL_curstack); 947 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 948 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 949 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 950
472 New(50,PL_tmps_stack,96,SV*); 951 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 952 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 953 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 954 PL_tmps_max = 32;
476 955
477 New(54,PL_markstack,16,I32); 956 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 957 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 958 PL_markstack_max = PL_markstack + 16;
480 959
481#ifdef SET_MARK_OFFSET 960#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 961 SET_MARK_OFFSET;
483#endif 962#endif
484 963
485 New(54,PL_scopestack,16,I32); 964 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 965 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 966 PL_scopestack_max = 8;
967#if HAS_SCOPESTACK_NAME
968 New(54,PL_scopestack_name,8,const char*);
969#endif
488 970
489 New(54,PL_savestack,96,ANY); 971 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 972 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 973 PL_savestack_max = 24;
974#if PERL_VERSION_ATLEAST (5,24,0)
975 /* perl 5.24 moves SS_MAXPUSH optimisation from */
976 /* the header macros to PL_savestack_max */
977 PL_savestack_max -= SS_MAXPUSH;
978#endif
492 979
493#if !PERL_VERSION_ATLEAST (5,9,0) 980#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 981 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 982 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 983 PL_retstack_max = 4;
497#endif 984#endif
498} 985}
986#endif
499 987
500/* 988/*
501 * destroy the stacks, the callchain etc... 989 * destroy the stacks, the callchain etc...
502 */ 990 */
503static void 991static void
504coro_destroy_stacks() 992coro_destruct_stacks (pTHX)
505{ 993{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 994 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 995 PL_curstackinfo = PL_curstackinfo->si_next;
519 996
520 while (PL_curstackinfo) 997 while (PL_curstackinfo)
521 { 998 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 999 PERL_SI *p = PL_curstackinfo->si_prev;
523 1000
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 1001 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 1002 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 1003
536 Safefree (PL_curstackinfo->si_cxstack); 1004 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 1005 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 1006 PL_curstackinfo = p;
539 } 1007 }
540 1008
541 Safefree (PL_tmps_stack); 1009 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 1010 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 1011 Safefree (PL_scopestack);
1012#if HAS_SCOPESTACK_NAME
1013 Safefree (PL_scopestack_name);
1014#endif
544 Safefree (PL_savestack); 1015 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 1016#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 1017 Safefree (PL_retstack);
547#endif 1018#endif
548} 1019}
549 1020
1021#define CORO_RSS \
1022 rss += sizeof (SYM (curstackinfo)); \
1023 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
1024 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
1025 rss += SYM (tmps_max) * sizeof (SV *); \
1026 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1027 rss += SYM (scopestack_max) * sizeof (I32); \
1028 rss += SYM (savestack_max) * sizeof (ANY);
1029
1030static size_t
1031coro_rss (pTHX_ struct coro *coro)
1032{
1033 size_t rss = sizeof (*coro);
1034
1035 if (coro->mainstack)
1036 {
1037 if (coro->flags & CF_RUNNING)
1038 {
1039 #define SYM(sym) PL_ ## sym
1040 CORO_RSS;
1041 #undef SYM
1042 }
1043 else
1044 {
1045 #define SYM(sym) coro->slot->sym
1046 CORO_RSS;
1047 #undef SYM
1048 }
1049 }
1050
1051 return rss;
1052}
1053
1054/** provide custom get/set/clear methods for %SIG elements ******************/
1055
1056/* apparently < 5.8.8 */
1057#ifndef MgPV_nolen_const
1058#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1059 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1060 (const char*)(mg)->mg_ptr)
1061#endif
1062
1063/* this will be a patched copy of PL_vtbl_sigelem */
1064static MGVTBL coro_sigelem_vtbl;
1065
1066static int ecb_cold
1067coro_sig_copy (pTHX_ SV *sv, MAGIC *mg, SV *nsv, const char *name, I32 namlen)
1068{
1069 char *key = SvPV_nolen ((SV *)name);
1070
1071 /* do what mg_copy normally does */
1072 sv_magic (nsv, mg->mg_obj, PERL_MAGIC_sigelem, name, namlen);
1073 assert (mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual == &PL_vtbl_sigelem);
1074
1075 /* patch sigelem vtbl, but only for __WARN__ and __DIE__ */
1076 if (*key == '_'
1077 && (strEQ (key, "__DIE__")
1078 || strEQ (key, "__WARN__")))
1079 mg_find (nsv, PERL_MAGIC_sigelem)->mg_virtual = &coro_sigelem_vtbl;
1080
1081 return 1;
1082}
1083
1084/* perl does not have a %SIG vtbl, we provide one so we can override */
1085/* the magic vtbl for the __DIE__ and __WARN__ members */
1086static const MGVTBL coro_sig_vtbl = {
1087 0, 0, 0, 0, 0,
1088 coro_sig_copy
1089};
1090
1091/*
1092 * This overrides the default magic get method of %SIG elements.
1093 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1094 * and instead of trying to save and restore the hash elements (extremely slow),
1095 * we just provide our own readback here.
1096 */
1097static int ecb_cold
1098coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1099{
1100 const char *s = MgPV_nolen_const (mg);
1101 /* the key must be either __DIE__ or __WARN__ here */
1102 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1103
1104 SV *ssv;
1105
1106 if (!*svp)
1107 ssv = &PL_sv_undef;
1108 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1109 ssv = sv_2mortal (newRV_inc (*svp));
1110 else
1111 ssv = *svp;
1112
1113 sv_setsv (sv, ssv);
1114 return 0;
1115}
1116
1117static int ecb_cold
1118coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1119{
1120 const char *s = MgPV_nolen_const (mg);
1121 /* the key must be either __DIE__ or __WARN__ here */
1122 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1123
1124 SV *old = *svp;
1125 *svp = 0;
1126 SvREFCNT_dec (old);
1127 return 0;
1128}
1129
1130static int ecb_cold
1131coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1132{
1133 const char *s = MgPV_nolen_const (mg);
1134 /* the key must be either __DIE__ or __WARN__ here */
1135 SV **svp = s[2] == 'D' ? &PL_diehook : &PL_warnhook;
1136
1137 SV *old = *svp;
1138 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1139 SvREFCNT_dec (old);
1140 return 0;
1141}
1142
1143static void
1144prepare_nop (pTHX_ struct coro_transfer_args *ta)
1145{
1146 /* kind of mega-hacky, but works */
1147 ta->next = ta->prev = (struct coro *)ta;
1148}
1149
550static void 1150static int
551setup_coro (struct coro *coro) 1151slf_check_nop (pTHX_ struct CoroSLF *frame)
1152{
1153 return 0;
1154}
1155
1156static int
1157slf_check_repeat (pTHX_ struct CoroSLF *frame)
1158{
1159 return 1;
1160}
1161
1162/** coroutine stack handling ************************************************/
1163
1164static UNOP init_perl_op;
1165
1166ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1167init_perl (pTHX_ struct coro *coro)
552{ 1168{
553 /* 1169 /*
554 * emulate part of the perl startup here. 1170 * emulate part of the perl startup here.
555 */ 1171 */
556
557 coro_init_stacks (); 1172 coro_init_stacks (aTHX);
558 1173
1174 PL_runops = RUNOPS_DEFAULT;
1175 PL_curcop = &PL_compiling;
1176 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 1177 PL_comppad = 0;
560 PL_in_eval = 0; 1178 PL_comppad_name = 0;
1179 PL_comppad_name_fill = 0;
1180 PL_comppad_name_floor = 0;
561 PL_curpm = 0; 1181 PL_curpm = 0;
1182 PL_curpad = 0;
1183 PL_localizing = 0;
1184 PL_restartop = 0;
1185#if PERL_VERSION_ATLEAST (5,10,0)
1186 PL_parser = 0;
1187#endif
1188 PL_hints = 0;
1189
1190 /* recreate the die/warn hooks */
1191 PL_diehook = SvREFCNT_inc (rv_diehook);
1192 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1193
1194 GvSV (PL_defgv) = newSV (0);
1195 GvAV (PL_defgv) = coro->args; coro->args = 0;
1196 GvSV (PL_errgv) = newSV (0);
1197 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1198 GvHV (PL_hintgv) = newHV ();
1199#if PERL_VERSION_ATLEAST (5,10,0)
1200 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1201#endif
1202 PL_rs = newSVsv (GvSV (irsgv));
1203 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
562 1204
563 { 1205 {
564 dSP; 1206 dSP;
565 LOGOP myop; 1207 UNOP myop;
566 1208
567 /* I have no idea why this is needed, but it is */ 1209 Zero (&myop, 1, UNOP);
1210 myop.op_next = Nullop;
1211 myop.op_type = OP_ENTERSUB;
1212 myop.op_flags = OPf_WANT_VOID;
1213
568 PUSHMARK (SP); 1214 PUSHMARK (SP);
569 1215 PUSHs ((SV *)coro->startcv);
570 SvREFCNT_dec (GvAV (PL_defgv)); 1216 PUTBACK;
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID;
576
577 PL_op = (OP *)&myop; 1217 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1218 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 1219 }
587}
588 1220
1221 /* this newly created coroutine might be run on an existing cctx which most
1222 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1223 */
1224 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1225 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1226 slf_frame.destroy = 0;
1227
1228 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1229 init_perl_op.op_next = PL_op;
1230 init_perl_op.op_type = OP_ENTERSUB;
1231 init_perl_op.op_ppaddr = pp_slf;
1232 /* no flags etc. required, as an init function won't be called */
1233
1234 PL_op = (OP *)&init_perl_op;
1235
1236 /* copy throw, in case it was set before init_perl */
1237 CORO_THROW = coro->except;
1238
1239 SWAP_SVS_ENTER (coro);
1240
1241 if (ecb_expect_false (enable_times))
1242 {
1243 coro_times_update ();
1244 coro_times_sub (coro);
1245 }
1246}
1247
589static void 1248static void
1249coro_unwind_stacks (pTHX)
1250{
1251 if (!IN_DESTRUCT)
1252 {
1253 /* restore all saved variables and stuff */
1254 LEAVE_SCOPE (0);
1255 assert (PL_tmps_floor == -1);
1256
1257 /* free all temporaries */
1258 FREETMPS;
1259 assert (PL_tmps_ix == -1);
1260
1261 /* unwind all extra stacks */
1262 POPSTACK_TO (PL_mainstack);
1263
1264 /* unwind main stack */
1265 dounwind (-1);
1266 }
1267}
1268
1269static void
1270destroy_perl (pTHX_ struct coro *coro)
1271{
1272 SV *svf [9];
1273
1274 {
1275 SV *old_current = SvRV (coro_current);
1276 struct coro *current = SvSTATE (old_current);
1277
1278 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1279
1280 save_perl (aTHX_ current);
1281
1282 /* this will cause transfer_check to croak on block*/
1283 SvRV_set (coro_current, (SV *)coro->hv);
1284
1285 load_perl (aTHX_ coro);
1286
1287 /* restore swapped sv's */
1288 SWAP_SVS_LEAVE (coro);
1289
1290 coro_unwind_stacks (aTHX);
1291
1292 coro_destruct_stacks (aTHX);
1293
1294 /* now save some sv's to be free'd later */
1295 svf [0] = GvSV (PL_defgv);
1296 svf [1] = (SV *)GvAV (PL_defgv);
1297 svf [2] = GvSV (PL_errgv);
1298 svf [3] = (SV *)PL_defoutgv;
1299 svf [4] = PL_rs;
1300 svf [5] = GvSV (irsgv);
1301 svf [6] = (SV *)GvHV (PL_hintgv);
1302 svf [7] = PL_diehook;
1303 svf [8] = PL_warnhook;
1304 assert (9 == sizeof (svf) / sizeof (*svf));
1305
1306 SvRV_set (coro_current, old_current);
1307
1308 load_perl (aTHX_ current);
1309 }
1310
1311 {
1312 unsigned int i;
1313
1314 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1315 SvREFCNT_dec (svf [i]);
1316
1317 SvREFCNT_dec (coro->saved_deffh);
1318 SvREFCNT_dec (coro->rouse_cb);
1319 SvREFCNT_dec (coro->invoke_cb);
1320 SvREFCNT_dec (coro->invoke_av);
1321 SvREFCNT_dec (coro->on_enter_xs);
1322 SvREFCNT_dec (coro->on_leave_xs);
1323 }
1324}
1325
1326ecb_inline void
590free_coro_mortal () 1327free_coro_mortal (pTHX)
591{ 1328{
592 if (coro_mortal) 1329 if (ecb_expect_true (coro_mortal))
593 { 1330 {
594 SvREFCNT_dec (coro_mortal); 1331 SvREFCNT_dec ((SV *)coro_mortal);
595 coro_mortal = 0; 1332 coro_mortal = 0;
596 } 1333 }
597} 1334}
598 1335
599static void NOINLINE
600prepare_cctx (coro_stack *cctx)
601{
602 dSP;
603 LOGOP myop;
604
605 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610
611 PUSHMARK (SP);
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
613 PUTBACK;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN;
616}
617
618static void 1336static int
619coro_run (void *arg) 1337runops_trace (pTHX)
620{ 1338{
621 /* coro_run is the alternative epilogue of transfer() */ 1339 COP *oldcop = 0;
622 UNLOCK; 1340 int oldcxix = -2;
623 1341
624 /* 1342 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
625 * this is a _very_ stripped down perl interpreter ;) 1343 {
626 */ 1344 PERL_ASYNC_CHECK ();
1345
1346 if (cctx_current->flags & CC_TRACE_ALL)
1347 {
1348 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1349 {
1350 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1351 SV **bot, **top;
1352 AV *av = newAV (); /* return values */
1353 SV **cb;
1354 dSP;
1355
1356 GV *gv = CvGV (cx->blk_sub.cv);
1357 SV *fullname = sv_2mortal (newSV (0));
1358 if (isGV (gv))
1359 gv_efullname3 (fullname, gv, 0);
1360
1361 bot = PL_stack_base + cx->blk_oldsp + 1;
1362 top = cx->blk_gimme == G_ARRAY ? SP + 1
1363 : cx->blk_gimme == G_SCALAR ? bot + 1
1364 : bot;
1365
1366 av_extend (av, top - bot);
1367 while (bot < top)
1368 av_push (av, SvREFCNT_inc_NN (*bot++));
1369
1370 PL_runops = RUNOPS_DEFAULT;
1371 ENTER;
1372 SAVETMPS;
1373 EXTEND (SP, 3);
1374 PUSHMARK (SP);
1375 PUSHs (&PL_sv_no);
1376 PUSHs (fullname);
1377 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1378 PUTBACK;
1379 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1380 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1381 SPAGAIN;
1382 FREETMPS;
1383 LEAVE;
1384 PL_runops = runops_trace;
1385 }
1386
1387 if (oldcop != PL_curcop)
1388 {
1389 oldcop = PL_curcop;
1390
1391 if (PL_curcop != &PL_compiling)
1392 {
1393 SV **cb;
1394
1395 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1396 {
1397 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1398
1399 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1400 {
1401 dSP;
1402 GV *gv = CvGV (cx->blk_sub.cv);
1403 SV *fullname = sv_2mortal (newSV (0));
1404
1405 if (isGV (gv))
1406 gv_efullname3 (fullname, gv, 0);
1407
1408 PL_runops = RUNOPS_DEFAULT;
1409 ENTER;
1410 SAVETMPS;
1411 EXTEND (SP, 3);
1412 PUSHMARK (SP);
1413 PUSHs (&PL_sv_yes);
1414 PUSHs (fullname);
1415 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1416 PUTBACK;
1417 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1418 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1419 SPAGAIN;
1420 FREETMPS;
1421 LEAVE;
1422 PL_runops = runops_trace;
1423 }
1424
1425 oldcxix = cxstack_ix;
1426 }
1427
1428 if (cctx_current->flags & CC_TRACE_LINE)
1429 {
1430 dSP;
1431
1432 PL_runops = RUNOPS_DEFAULT;
1433 ENTER;
1434 SAVETMPS;
1435 EXTEND (SP, 3);
1436 PL_runops = RUNOPS_DEFAULT;
1437 PUSHMARK (SP);
1438 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1439 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1440 PUTBACK;
1441 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1442 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1443 SPAGAIN;
1444 FREETMPS;
1445 LEAVE;
1446 PL_runops = runops_trace;
1447 }
1448 }
1449 }
1450 }
1451 }
1452
1453 TAINT_NOT;
1454 return 0;
1455}
1456
1457static struct CoroSLF cctx_ssl_frame;
1458
1459static void
1460slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1461{
1462 ta->prev = 0;
1463}
1464
1465static int
1466slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1467{
1468 *frame = cctx_ssl_frame;
1469
1470 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1471}
1472
1473/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1474static void ecb_noinline
1475cctx_prepare (pTHX)
1476{
627 PL_top_env = &PL_start_env; 1477 PL_top_env = &PL_start_env;
1478
1479 if (cctx_current->flags & CC_TRACE)
1480 PL_runops = runops_trace;
1481
1482 /* we already must be executing an SLF op, there is no other valid way
1483 * that can lead to creation of a new cctx */
1484 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1485 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1486
1487 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1488 cctx_ssl_frame = slf_frame;
1489
1490 slf_frame.prepare = slf_prepare_set_stacklevel;
1491 slf_frame.check = slf_check_set_stacklevel;
1492}
1493
1494/* the tail of transfer: execute stuff we can only do after a transfer */
1495ecb_inline void
1496transfer_tail (pTHX)
1497{
1498 free_coro_mortal (aTHX);
1499}
1500
1501/* try to exit the same way perl's main function would do */
1502/* we do not bother resetting the environment or other things *7
1503/* that are not, uhm, essential */
1504/* this obviously also doesn't work when perl is embedded */
1505static void ecb_noinline ecb_cold
1506perlish_exit (pTHX)
1507{
1508 int exitstatus = perl_destruct (PL_curinterp);
1509 perl_free (PL_curinterp);
1510 exit (exitstatus);
1511}
1512
1513/*
1514 * this is a _very_ stripped down perl interpreter ;)
1515 */
1516static void
1517cctx_run (void *arg)
1518{
1519#ifdef USE_ITHREADS
1520# if CORO_PTHREAD
1521 PERL_SET_CONTEXT (coro_thx);
1522# endif
1523#endif
1524 {
1525 dTHX;
1526
1527 /* normally we would need to skip the entersub here */
1528 /* not doing so will re-execute it, which is exactly what we want */
1529 /* PL_nop = PL_nop->op_next */
1530
628 /* inject call to cctx_init */ 1531 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx ((coro_stack *)arg); 1532 cctx_prepare (aTHX);
630 1533
1534 /* cctx_run is the alternative tail of transfer() */
1535 transfer_tail (aTHX);
1536
631 /* somebody will hit me for both perl_run and PL_restartop */ 1537 /* somebody or something will hit me for both perl_run and PL_restartop */
1538 PL_restartop = PL_op;
632 perl_run (PL_curinterp); 1539 perl_run (PL_curinterp);
1540 /*
1541 * Unfortunately, there is no way to get at the return values of the
1542 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1543 * runtime errors here, as this is just a random interpreter, not a thread.
1544 */
633 1545
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1546 /*
635 abort (); 1547 * pp_entersub in 5.24 no longer ENTERs, but perl_destruct
636} 1548 * requires PL_scopestack_ix, so do it here if required.
1549 */
1550 if (!PL_scopestack_ix)
1551 ENTER;
637 1552
1553 /*
1554 * If perl-run returns we assume exit() was being called or the coro
1555 * fell off the end, which seems to be the only valid (non-bug)
1556 * reason for perl_run to return. We try to mimic whatever perl is normally
1557 * doing in that case. YMMV.
1558 */
1559 perlish_exit (aTHX);
1560 }
1561}
1562
638static coro_stack * 1563static coro_cctx *
639stack_new () 1564cctx_new (void)
640{ 1565{
641 coro_stack *stack; 1566 coro_cctx *cctx;
642 1567
1568 ++cctx_count;
643 New (0, stack, 1, coro_stack); 1569 New (0, cctx, 1, coro_cctx);
644 1570
645#if HAVE_MMAP 1571 cctx->gen = cctx_gen;
1572 cctx->flags = 0;
1573 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
646 1574
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1575 return cctx;
648 /* mmap suppsedly does allocate-on-write for us */ 1576}
649 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1577
651 if (stack->sptr == (void *)-1) 1578/* create a new cctx only suitable as source */
1579static coro_cctx *
1580cctx_new_empty (void)
1581{
1582 coro_cctx *cctx = cctx_new ();
1583
1584 cctx->stack.sptr = 0;
1585 coro_create (&cctx->cctx, 0, 0, 0, 0);
1586
1587 return cctx;
1588}
1589
1590/* create a new cctx suitable as destination/running a perl interpreter */
1591static coro_cctx *
1592cctx_new_run (void)
1593{
1594 coro_cctx *cctx = cctx_new ();
1595
1596 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
652 { 1597 {
653 perror ("FATAL: unable to mmap stack for coroutine"); 1598 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
654 _exit (EXIT_FAILURE); 1599 _exit (EXIT_FAILURE);
655 } 1600 }
656 1601
657# if STACKGUARD 1602 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
659# endif
660 1603
661#else
662
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine");
669 _exit (EXIT_FAILURE);
670 }
671
672#endif
673
674#if USE_VALGRIND
675 stack->valgrind_id = VALGRIND_STACK_REGISTER (
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1604 return cctx;
684} 1605}
685 1606
686static void 1607static void
687stack_free (coro_stack *stack) 1608cctx_destroy (coro_cctx *cctx)
688{ 1609{
689 if (!stack) 1610 if (!cctx)
690 return; 1611 return;
691 1612
692#if USE_VALGRIND 1613 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
694#endif
695 1614
696#if HAVE_MMAP 1615 --cctx_count;
697 munmap (stack->sptr, stack->ssize); 1616 coro_destroy (&cctx->cctx);
698#else
699 Safefree (stack->sptr);
700#endif
701 1617
1618 coro_stack_free (&cctx->stack);
1619
702 Safefree (stack); 1620 Safefree (cctx);
703} 1621}
704 1622
705static coro_stack *stack_first; 1623/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1624#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
707 1625
708static coro_stack * 1626static coro_cctx *
709stack_get () 1627cctx_get (pTHX)
710{ 1628{
711 coro_stack *stack; 1629 while (ecb_expect_true (cctx_first))
712
713 if (stack_first)
714 { 1630 {
1631 coro_cctx *cctx = cctx_first;
1632 cctx_first = cctx->next;
715 --cctx_idle; 1633 --cctx_idle;
716 stack = stack_first; 1634
717 stack_first = stack->next; 1635 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
718 } 1636 return cctx;
719 else 1637
720 { 1638 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1639 }
725 1640
726 return stack; 1641 return cctx_new_run ();
727} 1642}
728 1643
729static void 1644static void
730stack_put (coro_stack *stack) 1645cctx_put (coro_cctx *cctx)
731{ 1646{
1647 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1648
1649 /* free another cctx if overlimit */
1650 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
1651 {
1652 coro_cctx *first = cctx_first;
1653 cctx_first = first->next;
1654 --cctx_idle;
1655
1656 cctx_destroy (first);
1657 }
1658
732 ++cctx_idle; 1659 ++cctx_idle;
733 stack->next = stack_first; 1660 cctx->next = cctx_first;
734 stack_first = stack; 1661 cctx_first = cctx;
735} 1662}
736 1663
737/* never call directly, always through the coro_state_transfer global variable */ 1664/** coroutine switching *****************************************************/
738static void NOINLINE 1665
1666static void
1667transfer_check (pTHX_ struct coro *prev, struct coro *next)
1668{
1669 /* TODO: throwing up here is considered harmful */
1670
1671 if (ecb_expect_true (prev != next))
1672 {
1673 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1674 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1675
1676 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1677 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1678
1679#if !PERL_VERSION_ATLEAST (5,10,0)
1680 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1681 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1682#endif
1683 }
1684}
1685
1686/* always use the TRANSFER macro */
1687static void ecb_noinline /* noinline so we have a fixed stackframe */
739transfer (struct coro *prev, struct coro *next, int flags) 1688transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1689{
741 dSTACKLEVEL; 1690 dSTACKLEVEL;
742 1691
743 /* sometimes transfer is only called to set idle_sp */ 1692 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1693 if (ecb_expect_false (!prev))
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1694 {
746 else if (prev != next) 1695 cctx_current->idle_sp = STACKLEVEL;
1696 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1697 }
748 coro_stack *prev__stack; 1698 else if (ecb_expect_true (prev != next))
1699 {
1700 coro_cctx *cctx_prev;
749 1701
750 LOCK; 1702 if (ecb_expect_false (prev->flags & CF_NEW))
751
752 if (next->mainstack)
753 { 1703 {
754 /* coroutine already started */ 1704 /* create a new empty/source context */
755 SAVE (prev, flags); 1705 prev->flags &= ~CF_NEW;
756 LOAD (next); 1706 prev->flags |= CF_RUNNING;
1707 }
1708
1709 prev->flags &= ~CF_RUNNING;
1710 next->flags |= CF_RUNNING;
1711
1712 /* first get rid of the old state */
1713 save_perl (aTHX_ prev);
1714
1715 if (ecb_expect_false (next->flags & CF_NEW))
1716 {
1717 /* need to start coroutine */
1718 next->flags &= ~CF_NEW;
1719 /* setup coroutine call */
1720 init_perl (aTHX_ next);
757 } 1721 }
758 else 1722 else
1723 load_perl (aTHX_ next);
1724
1725 /* possibly untie and reuse the cctx */
1726 if (ecb_expect_true (
1727 cctx_current->idle_sp == STACKLEVEL
1728 && !(cctx_current->flags & CC_TRACE)
1729 && !force_cctx
1730 ))
759 { 1731 {
760 /* need to start coroutine */ 1732 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1733 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
762 SAVE (prev, -1); 1734
763 /* setup coroutine call */ 1735 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
764 setup_coro (next); 1736 /* without this the next cctx_get might destroy the running cctx while still in use */
765 /* need a stack */ 1737 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
766 next->stack = 0; 1738 if (ecb_expect_true (!next->cctx))
1739 next->cctx = cctx_get (aTHX);
1740
1741 cctx_put (cctx_current);
767 } 1742 }
1743 else
1744 prev->cctx = cctx_current;
768 1745
769 if (!prev->stack) 1746 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1747
773 prev__stack = prev->stack; 1748 cctx_prev = cctx_current;
1749 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
774 1750
775 /* possibly "free" the stack */ 1751 next->cctx = 0;
776 if (prev__stack->idle_sp == STACKLEVEL) 1752
1753 if (ecb_expect_false (cctx_prev != cctx_current))
777 { 1754 {
778 stack_put (prev__stack); 1755 cctx_prev->top_env = PL_top_env;
779 prev->stack = 0; 1756 PL_top_env = cctx_current->top_env;
1757 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
780 } 1758 }
781 1759
782 if (!next->stack) 1760 transfer_tail (aTHX);
783 next->stack = stack_get ();
784
785 if (prev__stack != next->stack)
786 {
787 prev__stack->top_env = PL_top_env;
788 PL_top_env = next->stack->top_env;
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
790 }
791
792 free_coro_mortal ();
793
794 UNLOCK;
795 } 1761 }
796} 1762}
797 1763
798struct transfer_args 1764#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
799{
800 struct coro *prev, *next;
801 int flags;
802};
803
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1765#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
805 1766
1767/** high level stuff ********************************************************/
1768
1769/* this function is actually Coro, not Coro::State, but we call it from here */
1770/* because it is convenient - but it hasn't been declared yet for that reason */
806static void 1771static void
1772coro_call_on_destroy (pTHX_ struct coro *coro);
1773
1774static void
807coro_state_destroy (struct coro *coro) 1775coro_state_destroy (pTHX_ struct coro *coro)
808{ 1776{
809 if (coro->refcnt--) 1777 if (coro->flags & CF_ZOMBIE)
810 return; 1778 return;
811 1779
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1780 slf_destroy (aTHX_ coro);
813 {
814 struct coro temp;
815 1781
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1782 coro->flags |= CF_ZOMBIE;
817 LOAD (coro);
818 1783
819 coro_destroy_stacks (); 1784 if (coro->flags & CF_READY)
820
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */
822
823 coro->mainstack = 0;
824 } 1785 {
1786 /* reduce nready, as destroying a ready coro effectively unreadies it */
1787 /* alternative: look through all ready queues and remove the coro */
1788 --coro_nready;
1789 }
1790 else
1791 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
825 1792
826 stack_free (coro->stack); 1793 if (coro->next) coro->next->prev = coro->prev;
1794 if (coro->prev) coro->prev->next = coro->next;
1795 if (coro == coro_first) coro_first = coro->next;
1796
1797 if (coro->mainstack
1798 && coro->mainstack != main_mainstack
1799 && coro->slot
1800 && !PL_dirty)
1801 destroy_perl (aTHX_ coro);
1802
1803 cctx_destroy (coro->cctx);
1804 SvREFCNT_dec (coro->startcv);
827 SvREFCNT_dec (coro->args); 1805 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1806 SvREFCNT_dec (coro->swap_sv);
1807 SvREFCNT_dec (CORO_THROW);
1808
1809 coro_call_on_destroy (aTHX_ coro);
1810
1811 /* more destruction mayhem in coro_state_free */
829} 1812}
830 1813
831static int 1814static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1815coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1816{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1817 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1818 mg->mg_ptr = 0;
836 1819
837 coro_state_destroy (coro); 1820 coro_state_destroy (aTHX_ coro);
1821 SvREFCNT_dec (coro->on_destroy);
1822 SvREFCNT_dec (coro->status);
1823
1824 Safefree (coro);
838 1825
839 return 0; 1826 return 0;
840} 1827}
841 1828
842static int 1829static int ecb_cold
843coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1830coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844{ 1831{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1832 /* called when perl clones the current process the slow way (windows process emulation) */
846 1833 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
847 ++coro->refcnt; 1834 mg->mg_ptr = 0;
1835 mg->mg_virtual = 0;
848 1836
849 return 0; 1837 return 0;
850} 1838}
851 1839
852static MGVTBL coro_state_vtbl = { 1840static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1841 0, 0, 0, 0,
854 coro_state_clear, 1842 coro_state_free,
855 0, 1843 0,
856#ifdef MGf_DUP 1844#ifdef MGf_DUP
857 coro_state_dup, 1845 coro_state_dup,
858#else 1846#else
859# define MGf_DUP 0 1847# define MGf_DUP 0
860#endif 1848#endif
861}; 1849};
862 1850
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1851static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1852prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1853{
888 ta->prev = SvSTATE (prev); 1854 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1855 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1856 TRANSFER_CHECK (*ta);
891} 1857}
892 1858
893static void 1859static void
894api_transfer (SV *prev, SV *next, int flags) 1860api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1861{
1862 struct coro_transfer_args ta;
1863
1864 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1865 TRANSFER (ta, 1);
1866}
1867
1868/** Coro ********************************************************************/
1869
1870ecb_inline void
1871coro_enq (pTHX_ struct coro *coro)
1872{
1873 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1874
1875 SvREFCNT_inc_NN (coro->hv);
1876
1877 coro->next_ready = 0;
1878 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1879 ready [1] = coro;
1880}
1881
1882ecb_inline struct coro *
1883coro_deq (pTHX)
1884{
1885 int prio;
1886
1887 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1888 {
1889 struct coro **ready = coro_ready [prio];
1890
1891 if (ready [0])
1892 {
1893 struct coro *coro = ready [0];
1894 ready [0] = coro->next_ready;
1895 return coro;
1896 }
1897 }
1898
1899 return 0;
1900}
1901
1902static void
1903invoke_sv_ready_hook_helper (void)
895{ 1904{
896 dTHX; 1905 dTHX;
1906 dSP;
1907
1908 ENTER;
1909 SAVETMPS;
1910
1911 PUSHMARK (SP);
1912 PUTBACK;
1913 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1914
1915 FREETMPS;
1916 LEAVE;
1917}
1918
1919static int
1920api_ready (pTHX_ SV *coro_sv)
1921{
1922 struct coro *coro = SvSTATE (coro_sv);
1923
1924 if (coro->flags & CF_READY)
1925 return 0;
1926
1927 coro->flags |= CF_READY;
1928
1929 coro_enq (aTHX_ coro);
1930
1931 if (!coro_nready++)
1932 if (coroapi.readyhook)
1933 coroapi.readyhook ();
1934
1935 return 1;
1936}
1937
1938static int
1939api_is_ready (pTHX_ SV *coro_sv)
1940{
1941 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1942}
1943
1944/* expects to own a reference to next->hv */
1945ecb_inline void
1946prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1947{
1948 SV *prev_sv = SvRV (coro_current);
1949
1950 ta->prev = SvSTATE_hv (prev_sv);
1951 ta->next = next;
1952
1953 TRANSFER_CHECK (*ta);
1954
1955 SvRV_set (coro_current, (SV *)next->hv);
1956
1957 free_coro_mortal (aTHX);
1958 coro_mortal = prev_sv;
1959}
1960
1961static void
1962prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1963{
1964 for (;;)
1965 {
1966 struct coro *next = coro_deq (aTHX);
1967
1968 if (ecb_expect_true (next))
1969 {
1970 /* cannot transfer to destroyed coros, skip and look for next */
1971 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1972 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1973 else
1974 {
1975 next->flags &= ~CF_READY;
1976 --coro_nready;
1977
1978 prepare_schedule_to (aTHX_ ta, next);
1979 break;
1980 }
1981 }
1982 else
1983 {
1984 /* nothing to schedule: call the idle handler */
1985 if (SvROK (sv_idle)
1986 && SvOBJECT (SvRV (sv_idle)))
1987 {
1988 if (SvRV (sv_idle) == SvRV (coro_current))
1989 {
1990 require_pv ("Carp");
1991
1992 {
1993 dSP;
1994
1995 ENTER;
1996 SAVETMPS;
1997
1998 PUSHMARK (SP);
1999 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
2000 PUTBACK;
2001 call_pv ("Carp::confess", G_VOID | G_DISCARD);
2002
2003 FREETMPS;
2004 LEAVE;
2005 }
2006 }
2007
2008 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
2009 api_ready (aTHX_ SvRV (sv_idle));
2010 --coro_nready;
2011 }
2012 else
2013 {
2014 /* TODO: deprecated, remove, cannot work reliably *//*D*/
2015 dSP;
2016
2017 ENTER;
2018 SAVETMPS;
2019
2020 PUSHMARK (SP);
2021 PUTBACK;
2022 call_sv (sv_idle, G_VOID | G_DISCARD);
2023
2024 FREETMPS;
2025 LEAVE;
2026 }
2027 }
2028 }
2029}
2030
2031ecb_inline void
2032prepare_cede (pTHX_ struct coro_transfer_args *ta)
2033{
2034 api_ready (aTHX_ coro_current);
2035 prepare_schedule (aTHX_ ta);
2036}
2037
2038ecb_inline void
2039prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2040{
2041 SV *prev = SvRV (coro_current);
2042
2043 if (coro_nready)
2044 {
2045 prepare_schedule (aTHX_ ta);
2046 api_ready (aTHX_ prev);
2047 }
2048 else
2049 prepare_nop (aTHX_ ta);
2050}
2051
2052static void
2053api_schedule (pTHX)
2054{
897 struct transfer_args ta; 2055 struct coro_transfer_args ta;
898 2056
899 prepare_transfer (&ta, prev, next, flags); 2057 prepare_schedule (aTHX_ &ta);
900 TRANSFER (ta); 2058 TRANSFER (ta, 1);
901} 2059}
902 2060
903/** Coro ********************************************************************/ 2061static void
2062api_schedule_to (pTHX_ SV *coro_sv)
2063{
2064 struct coro_transfer_args ta;
2065 struct coro *next = SvSTATE (coro_sv);
904 2066
905#define PRIO_MAX 3 2067 SvREFCNT_inc_NN (coro_sv);
906#define PRIO_HIGH 1 2068 prepare_schedule_to (aTHX_ &ta, next);
907#define PRIO_NORMAL 0 2069}
908#define PRIO_LOW -1
909#define PRIO_IDLE -3
910#define PRIO_MIN -4
911 2070
912/* for Coro.pm */
913static GV *coro_current, *coro_idle;
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void 2071static int
918coro_enq (SV *sv) 2072api_cede (pTHX)
919{ 2073{
920 int prio; 2074 struct coro_transfer_args ta;
921 2075
922 if (SvTYPE (sv) != SVt_PVHV) 2076 prepare_cede (aTHX_ &ta);
923 croak ("Coro::ready tried to enqueue something that is not a coroutine");
924 2077
925 prio = SvSTATE (sv)->prio; 2078 if (ecb_expect_true (ta.prev != ta.next))
2079 {
2080 TRANSFER (ta, 1);
2081 return 1;
2082 }
2083 else
2084 return 0;
2085}
926 2086
927 av_push (coro_ready [prio - PRIO_MIN], sv); 2087static int
2088api_cede_notself (pTHX)
2089{
928 coro_nready++; 2090 if (coro_nready)
929} 2091 {
2092 struct coro_transfer_args ta;
930 2093
931static SV * 2094 prepare_cede_notself (aTHX_ &ta);
932coro_deq (int min_prio) 2095 TRANSFER (ta, 1);
933{ 2096 return 1;
934 int prio = PRIO_MAX - PRIO_MIN; 2097 }
2098 else
2099 return 0;
2100}
935 2101
936 min_prio -= PRIO_MIN; 2102static void
937 if (min_prio < 0) 2103api_trace (pTHX_ SV *coro_sv, int flags)
938 min_prio = 0; 2104{
2105 struct coro *coro = SvSTATE (coro_sv);
939 2106
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2107 if (coro->flags & CF_RUNNING)
941 if (AvFILLp (coro_ready [prio]) >= 0) 2108 croak ("cannot enable tracing on a running coroutine, caught");
2109
2110 if (flags & CC_TRACE)
2111 {
2112 if (!coro->cctx)
2113 coro->cctx = cctx_new_run ();
2114 else if (!(coro->cctx->flags & CC_TRACE))
2115 croak ("cannot enable tracing on coroutine with custom stack, caught");
2116
2117 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2118 }
2119 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2120 {
2121 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2122
2123 if (coro->flags & CF_RUNNING)
2124 PL_runops = RUNOPS_DEFAULT;
2125 else
2126 coro->slot->runops = RUNOPS_DEFAULT;
2127 }
2128}
2129
2130static void
2131coro_push_av (pTHX_ AV *av, I32 gimme_v)
2132{
2133 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2134 {
2135 dSP;
2136
2137 if (gimme_v == G_SCALAR)
2138 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2139 else
942 { 2140 {
943 coro_nready--; 2141 int i;
944 return av_shift (coro_ready [prio]); 2142 EXTEND (SP, AvFILLp (av) + 1);
2143
2144 for (i = 0; i <= AvFILLp (av); ++i)
2145 PUSHs (AvARRAY (av)[i]);
945 } 2146 }
2147
2148 PUTBACK;
2149 }
2150}
2151
2152static void
2153coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2154{
2155 if (!coro->on_destroy)
2156 coro->on_destroy = newAV ();
2157
2158 av_push (coro->on_destroy, cb);
2159}
2160
2161static void
2162slf_destroy_join (pTHX_ struct CoroSLF *frame)
2163{
2164 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2165}
2166
2167static int
2168slf_check_join (pTHX_ struct CoroSLF *frame)
2169{
2170 struct coro *coro = (struct coro *)frame->data;
2171
2172 if (!coro->status)
2173 return 1;
2174
2175 frame->destroy = 0;
2176
2177 coro_push_av (aTHX_ coro->status, GIMME_V);
2178
2179 SvREFCNT_dec ((SV *)coro->hv);
946 2180
947 return 0; 2181 return 0;
948} 2182}
949 2183
950static void 2184static void
951api_ready (SV *coro) 2185slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
952{ 2186{
953 dTHX; 2187 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
954 2188
955 if (SvROK (coro)) 2189 if (items > 1)
956 coro = SvRV (coro); 2190 croak ("join called with too many arguments");
957 2191
958 LOCK; 2192 if (coro->status)
959 coro_enq (SvREFCNT_inc (coro)); 2193 frame->prepare = prepare_nop;
960 UNLOCK; 2194 else
961} 2195 {
962 2196 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
963static void 2197 frame->prepare = prepare_schedule;
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 { 2198 }
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975 2199
2200 frame->check = slf_check_join;
2201 frame->destroy = slf_destroy_join;
2202 frame->data = (void *)coro;
2203 SvREFCNT_inc (coro->hv);
2204}
2205
2206static void
2207coro_call_on_destroy (pTHX_ struct coro *coro)
2208{
2209 AV *od = coro->on_destroy;
2210
2211 if (!od)
2212 return;
2213
2214 coro->on_destroy = 0;
2215 sv_2mortal ((SV *)od);
2216
2217 while (AvFILLp (od) >= 0)
2218 {
2219 SV *cb = sv_2mortal (av_pop (od));
2220
2221 /* coro hv's (and only hv's at the moment) are supported as well */
2222 if (SvSTATEhv_p (aTHX_ cb))
2223 api_ready (aTHX_ cb);
2224 else
2225 {
2226 dSP; /* don't disturb outer sp */
2227 PUSHMARK (SP);
2228
2229 if (coro->status)
2230 {
2231 PUTBACK;
2232 coro_push_av (aTHX_ coro->status, G_ARRAY);
2233 SPAGAIN;
2234 }
2235
2236 PUTBACK;
2237 call_sv (cb, G_VOID | G_DISCARD);
2238 }
2239 }
2240}
2241
2242static void
2243coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2244{
2245 AV *av;
2246
2247 if (coro->status)
2248 {
2249 av = coro->status;
2250 av_clear (av);
2251 }
2252 else
2253 av = coro->status = newAV ();
2254
2255 /* items are actually not so common, so optimise for this case */
2256 if (items)
2257 {
2258 int i;
2259
2260 av_extend (av, items - 1);
2261
2262 for (i = 0; i < items; ++i)
2263 av_push (av, SvREFCNT_inc_NN (arg [i]));
2264 }
2265}
2266
2267static void
2268slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2269{
2270 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2271 api_ready (aTHX_ sv_manager);
2272
2273 frame->prepare = prepare_schedule;
2274 frame->check = slf_check_repeat;
2275
2276 /* as a minor optimisation, we could unwind all stacks here */
2277 /* but that puts extra pressure on pp_slf, and is not worth much */
2278 /*coro_unwind_stacks (aTHX);*/
2279}
2280
2281static void
2282slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 HV *coro_hv = (HV *)SvRV (coro_current);
2285
2286 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2287 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2288}
2289
2290static void
2291slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 HV *coro_hv;
2294 struct coro *coro;
2295
2296 if (items <= 0)
2297 croak ("Coro::cancel called without coro object,");
2298
2299 coro = SvSTATE (arg [0]);
2300 coro_hv = coro->hv;
2301
2302 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2303
2304 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2305 {
2306 /* coro currently busy cancelling something, so just notify it */
2307 coro->slf_frame.data = (void *)coro;
2308
2309 frame->prepare = prepare_nop;
2310 frame->check = slf_check_nop;
2311 }
2312 else if (coro_hv == (HV *)SvRV (coro_current))
2313 {
2314 /* cancelling the current coro is allowed, and equals terminate */
2315 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2316 }
2317 else
2318 {
2319 struct coro *self = SvSTATE_current;
2320
976 if (next) 2321 if (!self)
977 break; 2322 croak ("Coro::cancel called outside of thread content,");
2323
2324 /* otherwise we cancel directly, purely for speed reasons
2325 * unfortunately, this requires some magic trickery, as
2326 * somebody else could cancel us, so we have to fight the cancellation.
2327 * this is ugly, and hopefully fully worth the extra speed.
2328 * besides, I can't get the slow-but-safe version working...
2329 */
2330 slf_frame.data = 0;
2331 self->flags |= CF_NOCANCEL;
2332 coro_state_destroy (aTHX_ coro);
2333 self->flags &= ~CF_NOCANCEL;
2334
2335 if (slf_frame.data)
2336 {
2337 /* while we were busy we have been cancelled, so terminate */
2338 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2339 }
2340 else
2341 {
2342 frame->prepare = prepare_nop;
2343 frame->check = slf_check_nop;
2344 }
2345 }
2346}
2347
2348static int
2349slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2350{
2351 frame->prepare = 0;
2352 coro_unwind_stacks (aTHX);
2353
2354 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
2355
2356 return 1;
2357}
2358
2359static int
2360safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
2361{
2362 if (coro->cctx)
2363 croak ("coro inside C callback, unable to cancel at this time, caught");
2364
2365 if (coro->flags & CF_NEW)
2366 {
2367 coro_set_status (aTHX_ coro, arg, items);
2368 coro_state_destroy (aTHX_ coro);
2369 }
2370 else
2371 {
2372 if (!coro->slf_frame.prepare)
2373 croak ("coro outside an SLF function, unable to cancel at this time, caught");
2374
2375 slf_destroy (aTHX_ coro);
2376
2377 coro_set_status (aTHX_ coro, arg, items);
2378 coro->slf_frame.prepare = prepare_nop;
2379 coro->slf_frame.check = slf_check_safe_cancel;
2380
2381 api_ready (aTHX_ (SV *)coro->hv);
2382 }
2383
2384 return 1;
2385}
2386
2387/*****************************************************************************/
2388/* async pool handler */
2389
2390static int
2391slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2392{
2393 HV *hv = (HV *)SvRV (coro_current);
2394 struct coro *coro = (struct coro *)frame->data;
2395
2396 if (!coro->invoke_cb)
2397 return 1; /* loop till we have invoke */
2398 else
2399 {
2400 hv_store (hv, "desc", sizeof ("desc") - 1,
2401 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2402
2403 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
978 2404
979 { 2405 {
980 dSP; 2406 dSP;
981 2407 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
982 ENTER;
983 SAVETMPS;
984
985 PUSHMARK (SP);
986 PUTBACK; 2408 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 } 2409 }
2410
2411 SvREFCNT_dec (GvAV (PL_defgv));
2412 GvAV (PL_defgv) = coro->invoke_av;
2413 coro->invoke_av = 0;
2414
2415 return 0;
2416 }
2417}
2418
2419static void
2420slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2421{
2422 HV *hv = (HV *)SvRV (coro_current);
2423 struct coro *coro = SvSTATE_hv ((SV *)hv);
2424
2425 if (ecb_expect_true (coro->saved_deffh))
992 } 2426 {
2427 /* subsequent iteration */
2428 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2429 coro->saved_deffh = 0;
993 2430
994 prev = SvRV (current); 2431 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
995 SvRV (current) = next; 2432 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2433 {
2434 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2435 return;
2436 }
2437 else
2438 {
2439 av_clear (GvAV (PL_defgv));
2440 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
996 2441
997 /* free this only after the transfer */ 2442 if (ecb_expect_false (coro->swap_sv))
998 LOCK; 2443 {
999 free_coro_mortal (); 2444 SWAP_SVS_LEAVE (coro);
1000 UNLOCK; 2445 SvREFCNT_dec_NN (coro->swap_sv);
1001 coro_mortal = prev; 2446 coro->swap_sv = 0;
2447 }
1002 2448
1003 ta->prev = SvSTATE (prev); 2449 coro->prio = 0;
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006}
1007 2450
2451 if (ecb_expect_false (coro->cctx) && ecb_expect_false (coro->cctx->flags & CC_TRACE))
2452 api_trace (aTHX_ coro_current, 0);
2453
2454 frame->prepare = prepare_schedule;
2455 av_push (av_async_pool, SvREFCNT_inc (hv));
2456 }
2457 }
2458 else
2459 {
2460 /* first iteration, simply fall through */
2461 frame->prepare = prepare_nop;
2462 }
2463
2464 frame->check = slf_check_pool_handler;
2465 frame->data = (void *)coro;
2466}
2467
2468/*****************************************************************************/
2469/* rouse callback */
2470
2471#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2472
2473static void
2474coro_rouse_callback (pTHX_ CV *cv)
2475{
2476 dXSARGS;
2477 SV *data = (SV *)S_GENSUB_ARG;
2478
2479 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2480 {
2481 /* first call, set args */
2482 SV *coro = SvRV (data);
2483 AV *av = newAV ();
2484
2485 SvRV_set (data, (SV *)av);
2486
2487 /* better take a full copy of the arguments */
2488 while (items--)
2489 av_store (av, items, newSVsv (ST (items)));
2490
2491 api_ready (aTHX_ coro);
2492 SvREFCNT_dec (coro);
2493 }
2494
2495 XSRETURN_EMPTY;
2496}
2497
1008static void 2498static int
2499slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2500{
2501 SV *data = (SV *)frame->data;
2502
2503 if (CORO_THROW)
2504 return 0;
2505
2506 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2507 return 1;
2508
2509 /* now push all results on the stack */
2510 {
2511 dSP;
2512 AV *av = (AV *)SvRV (data);
2513 int i;
2514
2515 EXTEND (SP, AvFILLp (av) + 1);
2516 for (i = 0; i <= AvFILLp (av); ++i)
2517 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2518
2519 /* we have stolen the elements, so set length to zero and free */
2520 AvFILLp (av) = -1;
2521 av_undef (av);
2522
2523 PUTBACK;
2524 }
2525
2526 return 0;
2527}
2528
2529static void
2530slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2531{
2532 SV *cb;
2533
2534 if (items)
2535 cb = arg [0];
2536 else
2537 {
2538 struct coro *coro = SvSTATE_current;
2539
2540 if (!coro->rouse_cb)
2541 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2542
2543 cb = sv_2mortal (coro->rouse_cb);
2544 coro->rouse_cb = 0;
2545 }
2546
2547 if (!SvROK (cb)
2548 || SvTYPE (SvRV (cb)) != SVt_PVCV
2549 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2550 croak ("Coro::rouse_wait called with illegal callback argument,");
2551
2552 {
2553 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2554 SV *data = (SV *)S_GENSUB_ARG;
2555
2556 frame->data = (void *)data;
2557 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2558 frame->check = slf_check_rouse_wait;
2559 }
2560}
2561
2562static SV *
2563coro_new_rouse_cb (pTHX)
2564{
2565 HV *hv = (HV *)SvRV (coro_current);
2566 struct coro *coro = SvSTATE_hv (hv);
2567 SV *data = newRV_inc ((SV *)hv);
2568 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
2569
2570 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2571 SvREFCNT_dec (data); /* magicext increases the refcount */
2572
2573 SvREFCNT_dec (coro->rouse_cb);
2574 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2575
2576 return cb;
2577}
2578
2579/*****************************************************************************/
2580/* schedule-like-function opcode (SLF) */
2581
2582static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2583static const CV *slf_cv;
2584static SV **slf_argv;
2585static int slf_argc, slf_arga; /* count, allocated */
2586static I32 slf_ax; /* top of stack, for restore */
2587
2588/* this restores the stack in the case we patched the entersub, to */
2589/* recreate the stack frame as perl will on following calls */
2590/* since entersub cleared the stack */
2591static OP *
2592pp_restore (pTHX)
2593{
2594 int i;
2595 SV **SP = PL_stack_base + slf_ax;
2596
2597 PUSHMARK (SP);
2598
2599 EXTEND (SP, slf_argc + 1);
2600
2601 for (i = 0; i < slf_argc; ++i)
2602 PUSHs (sv_2mortal (slf_argv [i]));
2603
2604 PUSHs ((SV *)CvGV (slf_cv));
2605
2606 RETURNOP (slf_restore.op_first);
2607}
2608
2609static void
2610slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2611{
2612 SV **arg = (SV **)slf_frame.data;
2613
2614 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2615}
2616
2617static void
2618slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2619{
2620 if (items != 2)
2621 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2622
2623 frame->prepare = slf_prepare_transfer;
2624 frame->check = slf_check_nop;
2625 frame->data = (void *)arg; /* let's hope it will stay valid */
2626}
2627
2628static void
2629slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2630{
2631 frame->prepare = prepare_schedule;
2632 frame->check = slf_check_nop;
2633}
2634
2635static void
1009prepare_cede (struct transfer_args *ta) 2636slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1010{ 2637{
1011 LOCK; 2638 struct coro *next = (struct coro *)slf_frame.data;
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014 2639
2640 SvREFCNT_inc_NN (next->hv);
1015 prepare_schedule (ta); 2641 prepare_schedule_to (aTHX_ ta, next);
1016} 2642}
1017 2643
1018static void 2644static void
1019api_schedule (void) 2645slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1020{ 2646{
1021 dTHX; 2647 if (!items)
2648 croak ("Coro::schedule_to expects a coroutine argument, caught");
2649
2650 frame->data = (void *)SvSTATE (arg [0]);
2651 frame->prepare = slf_prepare_schedule_to;
2652 frame->check = slf_check_nop;
2653}
2654
2655static void
2656slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2657{
2658 api_ready (aTHX_ SvRV (coro_current));
2659
2660 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2661}
2662
2663static void
2664slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2665{
2666 frame->prepare = prepare_cede;
2667 frame->check = slf_check_nop;
2668}
2669
2670static void
2671slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2672{
2673 frame->prepare = prepare_cede_notself;
2674 frame->check = slf_check_nop;
2675}
2676
2677/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2678static void
2679slf_destroy (pTHX_ struct coro *coro)
2680{
2681 struct CoroSLF frame = coro->slf_frame;
2682
2683 /*
2684 * The on_destroy below most likely is from an SLF call.
2685 * Since by definition the SLF call will not finish when we destroy
2686 * the coro, we will have to force-finish it here, otherwise
2687 * cleanup functions cannot call SLF functions.
2688 */
2689 coro->slf_frame.prepare = 0;
2690
2691 /* this callback is reserved for slf functions needing to do cleanup */
2692 if (frame.destroy && frame.prepare && !PL_dirty)
2693 frame.destroy (aTHX_ &frame);
2694}
2695
2696/*
2697 * these not obviously related functions are all rolled into one
2698 * function to increase chances that they all will call transfer with the same
2699 * stack offset
2700 * SLF stands for "schedule-like-function".
2701 */
2702static OP *
2703pp_slf (pTHX)
2704{
2705 I32 checkmark; /* mark SP to see how many elements check has pushed */
2706
2707 /* set up the slf frame, unless it has already been set-up */
2708 /* the latter happens when a new coro has been started */
2709 /* or when a new cctx was attached to an existing coroutine */
2710 if (ecb_expect_true (!slf_frame.prepare))
2711 {
2712 /* first iteration */
2713 dSP;
2714 SV **arg = PL_stack_base + TOPMARK + 1;
2715 int items = SP - arg; /* args without function object */
2716 SV *gv = *sp;
2717
2718 /* do a quick consistency check on the "function" object, and if it isn't */
2719 /* for us, divert to the real entersub */
2720 if (SvTYPE (gv) != SVt_PVGV
2721 || !GvCV (gv)
2722 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2723 return PL_ppaddr[OP_ENTERSUB](aTHX);
2724
2725 if (!(PL_op->op_flags & OPf_STACKED))
2726 {
2727 /* ampersand-form of call, use @_ instead of stack */
2728 AV *av = GvAV (PL_defgv);
2729 arg = AvARRAY (av);
2730 items = AvFILLp (av) + 1;
2731 }
2732
2733 /* now call the init function, which needs to set up slf_frame */
2734 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2735 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2736
2737 /* pop args */
2738 SP = PL_stack_base + POPMARK;
2739
2740 PUTBACK;
2741 }
2742
2743 /* now that we have a slf_frame, interpret it! */
2744 /* we use a callback system not to make the code needlessly */
2745 /* complicated, but so we can run multiple perl coros from one cctx */
2746
2747 do
2748 {
1022 struct transfer_args ta; 2749 struct coro_transfer_args ta;
1023 2750
1024 prepare_schedule (&ta); 2751 slf_frame.prepare (aTHX_ &ta);
1025 TRANSFER (ta); 2752 TRANSFER (ta, 0);
1026}
1027 2753
2754 checkmark = PL_stack_sp - PL_stack_base;
2755 }
2756 while (slf_frame.check (aTHX_ &slf_frame));
2757
2758 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2759
2760 /* exception handling */
2761 if (ecb_expect_false (CORO_THROW))
2762 {
2763 SV *exception = sv_2mortal (CORO_THROW);
2764
2765 CORO_THROW = 0;
2766 sv_setsv (ERRSV, exception);
2767 croak (0);
2768 }
2769
2770 /* return value handling - mostly like entersub */
2771 /* make sure we put something on the stack in scalar context */
2772 if (GIMME_V == G_SCALAR
2773 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2774 {
2775 dSP;
2776 SV **bot = PL_stack_base + checkmark;
2777
2778 if (sp == bot) /* too few, push undef */
2779 bot [1] = &PL_sv_undef;
2780 else /* too many, take last one */
2781 bot [1] = *sp;
2782
2783 SP = bot + 1;
2784
2785 PUTBACK;
2786 }
2787
2788 return NORMAL;
2789}
2790
2791static void
2792api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2793{
2794 int i;
2795 SV **arg = PL_stack_base + ax;
2796 int items = PL_stack_sp - arg + 1;
2797
2798 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2799
2800 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2801 && PL_op->op_ppaddr != pp_slf)
2802 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2803
2804 CvFLAGS (cv) |= CVf_SLF;
2805 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2806 slf_cv = cv;
2807
2808 /* we patch the op, and then re-run the whole call */
2809 /* we have to put the same argument on the stack for this to work */
2810 /* and this will be done by pp_restore */
2811 slf_restore.op_next = (OP *)&slf_restore;
2812 slf_restore.op_type = OP_CUSTOM;
2813 slf_restore.op_ppaddr = pp_restore;
2814 slf_restore.op_first = PL_op;
2815
2816 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2817
2818 if (PL_op->op_flags & OPf_STACKED)
2819 {
2820 if (items > slf_arga)
2821 {
2822 slf_arga = items;
2823 Safefree (slf_argv);
2824 New (0, slf_argv, slf_arga, SV *);
2825 }
2826
2827 slf_argc = items;
2828
2829 for (i = 0; i < items; ++i)
2830 slf_argv [i] = SvREFCNT_inc (arg [i]);
2831 }
2832 else
2833 slf_argc = 0;
2834
2835 PL_op->op_ppaddr = pp_slf;
2836 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2837
2838 PL_op = (OP *)&slf_restore;
2839}
2840
2841/*****************************************************************************/
2842/* dynamic wind */
2843
2844static void
2845on_enterleave_call (pTHX_ SV *cb)
2846{
2847 dSP;
2848
2849 PUSHSTACK;
2850
2851 PUSHMARK (SP);
2852 PUTBACK;
2853 call_sv (cb, G_VOID | G_DISCARD);
2854 SPAGAIN;
2855
2856 POPSTACK;
2857}
2858
2859static SV *
2860coro_avp_pop_and_free (pTHX_ AV **avp)
2861{
2862 AV *av = *avp;
2863 SV *res = av_pop (av);
2864
2865 if (AvFILLp (av) < 0)
2866 {
2867 *avp = 0;
2868 SvREFCNT_dec (av);
2869 }
2870
2871 return res;
2872}
2873
2874static void
2875coro_pop_on_enter (pTHX_ void *coro)
2876{
2877 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2878 SvREFCNT_dec (cb);
2879}
2880
2881static void
2882coro_pop_on_leave (pTHX_ void *coro)
2883{
2884 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2885 on_enterleave_call (aTHX_ sv_2mortal (cb));
2886}
2887
2888static void
2889enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2890{
2891 if (!hook)
2892 return;
2893
2894 if (!*avp)
2895 {
2896 *avp = newAV ();
2897 AvREAL_off (*avp);
2898 }
2899
2900 av_push (*avp, (SV *)hook);
2901 av_push (*avp, (SV *)arg);
2902}
2903
2904static void
2905enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2906{
2907 AV *av = *avp;
2908 int i;
2909
2910 if (!av)
2911 return;
2912
2913 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2914 if (AvARRAY (av)[i] == (SV *)hook)
2915 {
2916 if (execute)
2917 hook (aTHX_ (void *)AvARRAY (av)[i + 1]);
2918
2919 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2920 av_pop (av);
2921 av_pop (av);
2922 break;
2923 }
2924
2925 if (AvFILLp (av) >= 0)
2926 {
2927 *avp = 0;
2928 SvREFCNT_dec_NN (av);
2929 }
2930}
2931
2932static void
2933api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2934{
2935 struct coro *coro = SvSTATE (coro_sv);
2936
2937 if (SvSTATE_current == coro)
2938 if (enter)
2939 enter (aTHX_ enter_arg);
2940
2941 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2942 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2943}
2944
2945static void
2946api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2947{
2948 struct coro *coro = SvSTATE (coro_sv);
2949
2950 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2951 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2952}
2953
2954static void
2955savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2956{
2957 struct coro *coro = SvSTATE_current;
2958
2959 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2960}
2961
2962static void
2963savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2964{
2965 struct coro *coro = SvSTATE_current;
2966
2967 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2968}
2969
2970static void
2971api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2972{
2973 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2974
2975 /* this ought to be much cheaper than malloc + a single destructor call */
2976 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2977 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2978}
2979
2980/*****************************************************************************/
2981/* PerlIO::cede */
2982
2983typedef struct
2984{
2985 PerlIOBuf base;
2986 NV next, every;
2987} PerlIOCede;
2988
2989static IV ecb_cold
2990PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2991{
2992 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2993
2994 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2995 self->next = nvtime () + self->every;
2996
2997 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2998}
2999
3000static SV * ecb_cold
3001PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
3002{
3003 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3004
3005 return newSVnv (self->every);
3006}
3007
3008static IV
3009PerlIOCede_flush (pTHX_ PerlIO *f)
3010{
3011 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
3012 double now = nvtime ();
3013
3014 if (now >= self->next)
3015 {
3016 api_cede (aTHX);
3017 self->next = now + self->every;
3018 }
3019
3020 return PerlIOBuf_flush (aTHX_ f);
3021}
3022
3023static PerlIO_funcs PerlIO_cede =
3024{
3025 sizeof(PerlIO_funcs),
3026 "cede",
3027 sizeof(PerlIOCede),
3028 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
3029 PerlIOCede_pushed,
3030 PerlIOBuf_popped,
3031 PerlIOBuf_open,
3032 PerlIOBase_binmode,
3033 PerlIOCede_getarg,
3034 PerlIOBase_fileno,
3035 PerlIOBuf_dup,
3036 PerlIOBuf_read,
3037 PerlIOBuf_unread,
3038 PerlIOBuf_write,
3039 PerlIOBuf_seek,
3040 PerlIOBuf_tell,
3041 PerlIOBuf_close,
3042 PerlIOCede_flush,
3043 PerlIOBuf_fill,
3044 PerlIOBase_eof,
3045 PerlIOBase_error,
3046 PerlIOBase_clearerr,
3047 PerlIOBase_setlinebuf,
3048 PerlIOBuf_get_base,
3049 PerlIOBuf_bufsiz,
3050 PerlIOBuf_get_ptr,
3051 PerlIOBuf_get_cnt,
3052 PerlIOBuf_set_ptrcnt,
3053};
3054
3055/*****************************************************************************/
3056/* Coro::Semaphore & Coro::Signal */
3057
3058static SV *
3059coro_waitarray_new (pTHX_ int count)
3060{
3061 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3062 AV *av = newAV ();
3063 SV **ary;
3064
3065 /* unfortunately, building manually saves memory */
3066 Newx (ary, 2, SV *);
3067 AvALLOC (av) = ary;
3068#if PERL_VERSION_ATLEAST (5,10,0)
3069 AvARRAY (av) = ary;
3070#else
3071 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3072 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3073 SvPVX ((SV *)av) = (char *)ary;
3074#endif
3075 AvMAX (av) = 1;
3076 AvFILLp (av) = 0;
3077 ary [0] = newSViv (count);
3078
3079 return newRV_noinc ((SV *)av);
3080}
3081
3082/* semaphore */
3083
3084static void
3085coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3086{
3087 SV *count_sv = AvARRAY (av)[0];
3088 IV count = SvIVX (count_sv);
3089
3090 count += adjust;
3091 SvIVX (count_sv) = count;
3092
3093 /* now wake up as many waiters as are expected to lock */
3094 while (count > 0 && AvFILLp (av) > 0)
3095 {
3096 SV *cb;
3097
3098 /* swap first two elements so we can shift a waiter */
3099 AvARRAY (av)[0] = AvARRAY (av)[1];
3100 AvARRAY (av)[1] = count_sv;
3101 cb = av_shift (av);
3102
3103 if (SvOBJECT (cb))
3104 {
3105 api_ready (aTHX_ cb);
3106 --count;
3107 }
3108 else if (SvTYPE (cb) == SVt_PVCV)
3109 {
3110 dSP;
3111 PUSHMARK (SP);
3112 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3113 PUTBACK;
3114 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3115 }
3116
3117 SvREFCNT_dec_NN (cb);
3118 }
3119}
3120
3121static void
3122coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3123{
3124 /* call $sem->adjust (0) to possibly wake up some other waiters */
3125 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3126}
3127
1028static void 3128static int
1029api_cede (void) 3129slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1030{ 3130{
1031 dTHX; 3131 AV *av = (AV *)frame->data;
1032 struct transfer_args ta; 3132 SV *count_sv = AvARRAY (av)[0];
3133 SV *coro_hv = SvRV (coro_current);
1033 3134
1034 prepare_cede (&ta); 3135 frame->destroy = 0;
1035 TRANSFER (ta);
1036}
1037 3136
3137 /* if we are about to throw, don't actually acquire the lock, just throw */
3138 if (ecb_expect_false (CORO_THROW))
3139 {
3140 /* we still might be responsible for the semaphore, so wake up others */
3141 coro_semaphore_adjust (aTHX_ av, 0);
3142
3143 return 0;
3144 }
3145 else if (SvIVX (count_sv) > 0)
3146 {
3147 if (acquire)
3148 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3149 else
3150 coro_semaphore_adjust (aTHX_ av, 0);
3151
3152 return 0;
3153 }
3154 else
3155 {
3156 int i;
3157 /* if we were woken up but can't down, we look through the whole */
3158 /* waiters list and only add us if we aren't in there already */
3159 /* this avoids some degenerate memory usage cases */
3160 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3161 if (AvARRAY (av)[i] == coro_hv)
3162 return 1;
3163
3164 av_push (av, SvREFCNT_inc (coro_hv));
3165 return 1;
3166 }
3167}
3168
3169static int
3170slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3171{
3172 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3173}
3174
3175static int
3176slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3177{
3178 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3179}
3180
3181static void
3182slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3183{
3184 AV *av = (AV *)SvRV (arg [0]);
3185
3186 if (SvIVX (AvARRAY (av)[0]) > 0)
3187 {
3188 frame->data = (void *)av;
3189 frame->prepare = prepare_nop;
3190 }
3191 else
3192 {
3193 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3194
3195 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3196 frame->prepare = prepare_schedule;
3197 /* to avoid race conditions when a woken-up coro gets terminated */
3198 /* we arrange for a temporary on_destroy that calls adjust (0) */
3199 frame->destroy = coro_semaphore_destroy;
3200 }
3201}
3202
3203static void
3204slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3205{
3206 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3207 frame->check = slf_check_semaphore_down;
3208}
3209
3210static void
3211slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3212{
3213 if (items >= 2)
3214 {
3215 /* callback form */
3216 AV *av = (AV *)SvRV (arg [0]);
3217 SV *cb_cv = s_get_cv_croak (arg [1]);
3218
3219 av_push (av, SvREFCNT_inc_NN (cb_cv));
3220
3221 if (SvIVX (AvARRAY (av)[0]) > 0)
3222 coro_semaphore_adjust (aTHX_ av, 0);
3223
3224 frame->prepare = prepare_nop;
3225 frame->check = slf_check_nop;
3226 }
3227 else
3228 {
3229 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3230 frame->check = slf_check_semaphore_wait;
3231 }
3232}
3233
3234/* signal */
3235
3236static void
3237coro_signal_wake (pTHX_ AV *av, int count)
3238{
3239 SvIVX (AvARRAY (av)[0]) = 0;
3240
3241 /* now signal count waiters */
3242 while (count > 0 && AvFILLp (av) > 0)
3243 {
3244 SV *cb;
3245
3246 /* swap first two elements so we can shift a waiter */
3247 cb = AvARRAY (av)[0];
3248 AvARRAY (av)[0] = AvARRAY (av)[1];
3249 AvARRAY (av)[1] = cb;
3250
3251 cb = av_shift (av);
3252
3253 if (SvTYPE (cb) == SVt_PVCV)
3254 {
3255 dSP;
3256 PUSHMARK (SP);
3257 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3258 PUTBACK;
3259 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3260 }
3261 else
3262 {
3263 api_ready (aTHX_ cb);
3264 sv_setiv (cb, 0); /* signal waiter */
3265 }
3266
3267 SvREFCNT_dec_NN (cb);
3268
3269 --count;
3270 }
3271}
3272
3273static int
3274slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3275{
3276 /* if we are about to throw, also stop waiting */
3277 return SvROK ((SV *)frame->data) && !CORO_THROW;
3278}
3279
3280static void
3281slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3282{
3283 AV *av = (AV *)SvRV (arg [0]);
3284
3285 if (items >= 2)
3286 {
3287 SV *cb_cv = s_get_cv_croak (arg [1]);
3288 av_push (av, SvREFCNT_inc_NN (cb_cv));
3289
3290 if (SvIVX (AvARRAY (av)[0]))
3291 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3292
3293 frame->prepare = prepare_nop;
3294 frame->check = slf_check_nop;
3295 }
3296 else if (SvIVX (AvARRAY (av)[0]))
3297 {
3298 SvIVX (AvARRAY (av)[0]) = 0;
3299 frame->prepare = prepare_nop;
3300 frame->check = slf_check_nop;
3301 }
3302 else
3303 {
3304 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3305
3306 av_push (av, waiter);
3307
3308 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3309 frame->prepare = prepare_schedule;
3310 frame->check = slf_check_signal_wait;
3311 }
3312}
3313
3314/*****************************************************************************/
3315/* Coro::AIO */
3316
3317#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3318
3319/* helper storage struct */
3320struct io_state
3321{
3322 int errorno;
3323 I32 laststype; /* U16 in 5.10.0 */
3324 int laststatval;
3325 Stat_t statcache;
3326};
3327
3328static void
3329coro_aio_callback (pTHX_ CV *cv)
3330{
3331 dXSARGS;
3332 AV *state = (AV *)S_GENSUB_ARG;
3333 SV *coro = av_pop (state);
3334 SV *data_sv = newSV (sizeof (struct io_state));
3335
3336 av_extend (state, items - 1);
3337
3338 sv_upgrade (data_sv, SVt_PV);
3339 SvCUR_set (data_sv, sizeof (struct io_state));
3340 SvPOK_only (data_sv);
3341
3342 {
3343 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3344
3345 data->errorno = errno;
3346 data->laststype = PL_laststype;
3347 data->laststatval = PL_laststatval;
3348 data->statcache = PL_statcache;
3349 }
3350
3351 /* now build the result vector out of all the parameters and the data_sv */
3352 {
3353 int i;
3354
3355 for (i = 0; i < items; ++i)
3356 av_push (state, SvREFCNT_inc_NN (ST (i)));
3357 }
3358
3359 av_push (state, data_sv);
3360
3361 api_ready (aTHX_ coro);
3362 SvREFCNT_dec_NN (coro);
3363 SvREFCNT_dec_NN ((AV *)state);
3364}
3365
3366static int
3367slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3368{
3369 AV *state = (AV *)frame->data;
3370
3371 /* if we are about to throw, return early */
3372 /* this does not cancel the aio request, but at least */
3373 /* it quickly returns */
3374 if (CORO_THROW)
3375 return 0;
3376
3377 /* one element that is an RV? repeat! */
3378 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3379 return 1;
3380
3381 /* restore status */
3382 {
3383 SV *data_sv = av_pop (state);
3384 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3385
3386 errno = data->errorno;
3387 PL_laststype = data->laststype;
3388 PL_laststatval = data->laststatval;
3389 PL_statcache = data->statcache;
3390
3391 SvREFCNT_dec_NN (data_sv);
3392 }
3393
3394 /* push result values */
3395 {
3396 dSP;
3397 int i;
3398
3399 EXTEND (SP, AvFILLp (state) + 1);
3400 for (i = 0; i <= AvFILLp (state); ++i)
3401 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3402
3403 PUTBACK;
3404 }
3405
3406 return 0;
3407}
3408
3409static void
3410slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3411{
3412 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3413 SV *coro_hv = SvRV (coro_current);
3414 struct coro *coro = SvSTATE_hv (coro_hv);
3415
3416 /* put our coroutine id on the state arg */
3417 av_push (state, SvREFCNT_inc_NN (coro_hv));
3418
3419 /* first see whether we have a non-zero priority and set it as AIO prio */
3420 if (coro->prio)
3421 {
3422 dSP;
3423
3424 static SV *prio_cv;
3425 static SV *prio_sv;
3426
3427 if (ecb_expect_false (!prio_cv))
3428 {
3429 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3430 prio_sv = newSViv (0);
3431 }
3432
3433 PUSHMARK (SP);
3434 sv_setiv (prio_sv, coro->prio);
3435 XPUSHs (prio_sv);
3436
3437 PUTBACK;
3438 call_sv (prio_cv, G_VOID | G_DISCARD);
3439 }
3440
3441 /* now call the original request */
3442 {
3443 dSP;
3444 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3445 int i;
3446
3447 PUSHMARK (SP);
3448
3449 /* first push all args to the stack */
3450 EXTEND (SP, items + 1);
3451
3452 for (i = 0; i < items; ++i)
3453 PUSHs (arg [i]);
3454
3455 /* now push the callback closure */
3456 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3457
3458 /* now call the AIO function - we assume our request is uncancelable */
3459 PUTBACK;
3460 call_sv ((SV *)req, G_VOID | G_DISCARD);
3461 }
3462
3463 /* now that the request is going, we loop till we have a result */
3464 frame->data = (void *)state;
3465 frame->prepare = prepare_schedule;
3466 frame->check = slf_check_aio_req;
3467}
3468
3469static void
3470coro_aio_req_xs (pTHX_ CV *cv)
3471{
3472 dXSARGS;
3473
3474 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3475
3476 XSRETURN_EMPTY;
3477}
3478
3479/*****************************************************************************/
3480
3481#if CORO_CLONE
3482# include "clone.c"
3483#endif
3484
3485/*****************************************************************************/
3486
3487static SV *
3488coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3489{
3490 SV *coro_sv;
3491 struct coro *coro;
3492 MAGIC *mg;
3493 HV *hv;
3494 SV *cb;
3495 int i;
3496
3497 if (argc > 0)
3498 {
3499 cb = s_get_cv_croak (argv [0]);
3500
3501 if (!is_coro)
3502 {
3503 if (CvISXSUB (cb))
3504 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3505
3506 if (!CvROOT (cb))
3507 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3508 }
3509 }
3510
3511 Newz (0, coro, 1, struct coro);
3512 coro->args = newAV ();
3513 coro->flags = CF_NEW;
3514
3515 if (coro_first) coro_first->prev = coro;
3516 coro->next = coro_first;
3517 coro_first = coro;
3518
3519 coro->hv = hv = newHV ();
3520 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3521 mg->mg_flags |= MGf_DUP;
3522 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3523
3524 if (argc > 0)
3525 {
3526 av_extend (coro->args, argc + is_coro - 1);
3527
3528 if (is_coro)
3529 {
3530 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3531 cb = (SV *)cv_coro_run;
3532 }
3533
3534 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3535
3536 for (i = 1; i < argc; i++)
3537 av_push (coro->args, newSVsv (argv [i]));
3538 }
3539
3540 return coro_sv;
3541}
3542
3543#ifndef __cplusplus
3544ecb_cold XS(boot_Coro__State);
3545#endif
3546
3547#if CORO_JIT
3548
3549static void ecb_noinline ecb_cold
3550pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3551{
3552 dSP;
3553 AV *av = newAV ();
3554
3555 av_store (av, 3, newSVuv (d));
3556 av_store (av, 2, newSVuv (c));
3557 av_store (av, 1, newSVuv (b));
3558 av_store (av, 0, newSVuv (a));
3559
3560 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3561
3562 PUTBACK;
3563}
3564
3565static void ecb_noinline ecb_cold
3566jit_init (pTHX)
3567{
3568 dSP;
3569 SV *load, *save;
3570 char *map_base;
3571 char *load_ptr, *save_ptr;
3572 STRLEN load_len, save_len, map_len;
3573 int count;
3574
3575 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3576
3577 PUSHMARK (SP);
3578 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3579 #include "state.h"
3580 count = call_pv ("Coro::State::_jit", G_ARRAY);
3581 SPAGAIN;
3582
3583 save = POPs; save_ptr = SvPVbyte (save, save_len);
3584 load = POPs; load_ptr = SvPVbyte (load, load_len);
3585
3586 map_len = load_len + save_len + 16;
3587
3588 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3589
3590 if (map_base == (char *)MAP_FAILED)
3591 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3592
3593 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3594
3595 load_perl_slots = (load_save_perl_slots_type)map_base;
3596 memcpy (map_base, load_ptr, load_len);
3597
3598 map_base += (load_len + 15) & ~15;
3599
3600 save_perl_slots = (load_save_perl_slots_type)map_base;
3601 memcpy (map_base, save_ptr, save_len);
3602
3603 /* we are good citizens and try to make the page read-only, so the evil evil */
3604 /* hackers might have it a bit more difficult */
3605 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3606
3607 PUTBACK;
3608 eval_pv ("undef &Coro::State::_jit", 1);
3609}
3610
3611#endif
3612
1038MODULE = Coro::State PACKAGE = Coro::State 3613MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 3614
1040PROTOTYPES: DISABLE 3615PROTOTYPES: DISABLE
1041 3616
1042BOOT: 3617BOOT:
1043{ 3618{
3619#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3620#include "state.h"
1044#ifdef USE_ITHREADS 3621#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 3622# if CORO_PTHREAD
3623 coro_thx = PERL_GET_CONTEXT;
1046#endif 3624# endif
1047 BOOT_PAGESIZE; 3625#endif
3626 /* perl defines these to check for existance first, but why it doesn't */
3627 /* just create them one at init time is not clear to me, except for */
3628 /* programs trying to delete them, but... */
3629 /* anyway, we declare this as invalid and make sure they are initialised here */
3630 DEFSV;
3631 ERRSV;
3632
3633 cctx_current = cctx_new_empty ();
3634
3635 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3636 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3637
3638 {
3639 /*
3640 * we provide a vtbvl for %SIG magic that replaces PL_vtbl_sig
3641 * by coro_sig_vtbl in hash values.
3642 */
3643 MAGIC *mg = mg_find ((SV *)GvHV (gv_fetchpv ("SIG", GV_ADD | GV_NOTQUAL, SVt_PVHV)), PERL_MAGIC_sig);
3644
3645 /* this only works if perl doesn't have a vtbl for %SIG */
3646 assert (!mg->mg_virtual);
3647
3648 /*
3649 * The irony is that the perl API itself asserts that mg_virtual
3650 * must be non-const, yet perl5porters insisted on marking their
3651 * vtbls as read-only, just to thwart perl modules from patching
3652 * them.
3653 */
3654 mg->mg_virtual = (MGVTBL *)&coro_sig_vtbl;
3655 mg->mg_flags |= MGf_COPY;
3656
3657 coro_sigelem_vtbl = PL_vtbl_sigelem;
3658 coro_sigelem_vtbl.svt_get = coro_sigelem_get;
3659 coro_sigelem_vtbl.svt_set = coro_sigelem_set;
3660 coro_sigelem_vtbl.svt_clear = coro_sigelem_clr;
3661 }
3662
3663 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3664 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1048 3665
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3666 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 3667
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3668 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3669 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3670 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3671 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 3672
1055 main_mainstack = PL_mainstack; 3673 main_mainstack = PL_mainstack;
3674 main_top_env = PL_top_env;
1056 3675
3676 while (main_top_env->je_prev)
3677 main_top_env = main_top_env->je_prev;
3678
3679 {
3680 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3681
3682 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3683 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3684
3685 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3686 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3687 }
3688
1057 coroapi.ver = CORO_API_VERSION; 3689 coroapi.ver = CORO_API_VERSION;
3690 coroapi.rev = CORO_API_REVISION;
3691
1058 coroapi.transfer = api_transfer; 3692 coroapi.transfer = api_transfer;
1059 3693
3694 coroapi.sv_state = SvSTATE_;
3695 coroapi.execute_slf = api_execute_slf;
3696 coroapi.prepare_nop = prepare_nop;
3697 coroapi.prepare_schedule = prepare_schedule;
3698 coroapi.prepare_cede = prepare_cede;
3699 coroapi.prepare_cede_notself = prepare_cede_notself;
3700
3701 time_init (aTHX);
3702
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3703 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3704#if CORO_JIT
3705 PUTBACK;
3706 jit_init (aTHX);
3707 SPAGAIN;
3708#endif
1061} 3709}
1062 3710
1063SV * 3711SV *
1064new (char *klass, ...) 3712new (SV *klass, ...)
3713 ALIAS:
3714 Coro::new = 1
1065 CODE: 3715 CODE:
1066{ 3716 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1067 struct coro *coro; 3717 OUTPUT:
1068 HV *hv; 3718 RETVAL
1069 int i;
1070 3719
1071 Newz (0, coro, 1, struct coro); 3720void
1072 coro->args = newAV (); 3721transfer (...)
3722 PROTOTYPE: $$
3723 CODE:
3724 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1073 3725
3726SV *
3727clone (Coro::State coro)
3728 CODE:
3729{
3730#if CORO_CLONE
3731 struct coro *ncoro = coro_clone (aTHX_ coro);
3732 MAGIC *mg;
3733 /* TODO: too much duplication */
1074 hv = newHV (); 3734 ncoro->hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3735 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3736 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3737 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3738#else
3739 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3740#endif
3741}
3742 OUTPUT:
3743 RETVAL
1077 3744
1078 for (i = 1; i < items; i++) 3745int
1079 av_push (coro->args, newSVsv (ST (i))); 3746cctx_stacksize (int new_stacksize = 0)
3747 PROTOTYPE: ;$
3748 CODE:
3749 RETVAL = cctx_stacksize;
3750 if (new_stacksize)
3751 {
3752 cctx_stacksize = new_stacksize;
3753 ++cctx_gen;
3754 }
3755 OUTPUT:
3756 RETVAL
1080 3757
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 3758int
1082 /*coro->stack = 0;*/ 3759cctx_max_idle (int max_idle = 0)
3760 PROTOTYPE: ;$
3761 CODE:
3762 RETVAL = cctx_max_idle;
3763 if (max_idle > 1)
3764 cctx_max_idle = max_idle;
3765 OUTPUT:
3766 RETVAL
3767
3768int
3769cctx_count ()
3770 PROTOTYPE:
3771 CODE:
3772 RETVAL = cctx_count;
3773 OUTPUT:
3774 RETVAL
3775
3776int
3777cctx_idle ()
3778 PROTOTYPE:
3779 CODE:
3780 RETVAL = cctx_idle;
3781 OUTPUT:
3782 RETVAL
3783
3784void
3785list ()
3786 PROTOTYPE:
3787 PPCODE:
3788{
3789 struct coro *coro;
3790 for (coro = coro_first; coro; coro = coro->next)
3791 if (coro->hv)
3792 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3793}
3794
3795void
3796call (Coro::State coro, SV *coderef)
3797 ALIAS:
3798 eval = 1
3799 CODE:
3800{
3801 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3802 {
3803 struct coro *current = SvSTATE_current;
3804 struct CoroSLF slf_save;
3805
3806 if (current != coro)
3807 {
3808 PUTBACK;
3809 save_perl (aTHX_ current);
3810 load_perl (aTHX_ coro);
3811 /* the coro is most likely in an active SLF call.
3812 * while not strictly required (the code we execute is
3813 * not allowed to call any SLF functions), it's cleaner
3814 * to reinitialise the slf_frame and restore it later.
3815 * This might one day allow us to actually do SLF calls
3816 * from code executed here.
3817 */
3818 slf_save = slf_frame;
3819 slf_frame.prepare = 0;
3820 SPAGAIN;
3821 }
3822
3823 PUSHSTACK;
3824
3825 PUSHMARK (SP);
3826 PUTBACK;
3827
3828 if (ix)
3829 eval_sv (coderef, 0);
3830 else
3831 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3832
3833 POPSTACK;
3834 SPAGAIN;
3835
3836 if (current != coro)
3837 {
3838 PUTBACK;
3839 slf_frame = slf_save;
3840 save_perl (aTHX_ coro);
3841 load_perl (aTHX_ current);
3842 SPAGAIN;
3843 }
3844 }
3845}
3846
3847SV *
3848is_ready (Coro::State coro)
3849 PROTOTYPE: $
3850 ALIAS:
3851 is_ready = CF_READY
3852 is_running = CF_RUNNING
3853 is_new = CF_NEW
3854 is_destroyed = CF_ZOMBIE
3855 is_zombie = CF_ZOMBIE
3856 is_suspended = CF_SUSPENDED
3857 CODE:
3858 RETVAL = boolSV (coro->flags & ix);
3859 OUTPUT:
3860 RETVAL
3861
3862void
3863throw (SV *self, SV *exception = &PL_sv_undef)
3864 PROTOTYPE: $;$
3865 CODE:
3866{
3867 struct coro *coro = SvSTATE (self);
3868 struct coro *current = SvSTATE_current;
3869 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3870 SvREFCNT_dec (*exceptionp);
3871 SvGETMAGIC (exception);
3872 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3873
3874 api_ready (aTHX_ self);
3875}
3876
3877void
3878api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3879 PROTOTYPE: $;$
3880 C_ARGS: aTHX_ coro, flags
3881
3882SV *
3883has_cctx (Coro::State coro)
3884 PROTOTYPE: $
3885 CODE:
3886 /* maybe manage the running flag differently */
3887 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3888 OUTPUT:
3889 RETVAL
3890
3891int
3892is_traced (Coro::State coro)
3893 PROTOTYPE: $
3894 CODE:
3895 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3896 OUTPUT:
3897 RETVAL
3898
3899UV
3900rss (Coro::State coro)
3901 PROTOTYPE: $
3902 ALIAS:
3903 usecount = 1
3904 CODE:
3905 switch (ix)
3906 {
3907 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3908 case 1: RETVAL = coro->usecount; break;
3909 }
3910 OUTPUT:
3911 RETVAL
3912
3913void
3914force_cctx ()
3915 PROTOTYPE:
3916 CODE:
3917 cctx_current->idle_sp = 0;
3918
3919void
3920swap_defsv (Coro::State self)
3921 PROTOTYPE: $
3922 ALIAS:
3923 swap_defav = 1
3924 CODE:
3925 if (!self->slot)
3926 croak ("cannot swap state with coroutine that has no saved state,");
3927 else
3928 {
3929 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3930 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3931
3932 SV *tmp = *src; *src = *dst; *dst = tmp;
3933 }
3934
3935void
3936cancel (Coro::State self)
3937 CODE:
3938 coro_state_destroy (aTHX_ self);
3939
3940SV *
3941enable_times (int enabled = enable_times)
3942 CODE:
3943{
3944 RETVAL = boolSV (enable_times);
3945
3946 if (enabled != enable_times)
3947 {
3948 enable_times = enabled;
3949
3950 coro_times_update ();
3951 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3952 }
1083} 3953}
1084 OUTPUT: 3954 OUTPUT:
1085 RETVAL 3955 RETVAL
1086 3956
1087void 3957void
1088_set_stacklevel (...) 3958times (Coro::State self)
1089 ALIAS: 3959 PPCODE:
1090 Coro::State::transfer = 1
1091 Coro::schedule = 2
1092 Coro::cede = 3
1093 Coro::Cont::yield = 4
1094 CODE:
1095{ 3960{
1096 struct transfer_args ta; 3961 struct coro *current = SvSTATE (coro_current);
1097 3962
1098 switch (ix) 3963 if (ecb_expect_false (current == self))
1099 { 3964 {
1100 case 0: 3965 coro_times_update ();
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3966 coro_times_add (SvSTATE (coro_current));
1102 ta.next = 0; 3967 }
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break;
1105 3968
1106 case 1: 3969 EXTEND (SP, 2);
1107 if (items != 3) 3970 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 3971 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
1109 3972
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 3973 if (ecb_expect_false (current == self))
1111 break; 3974 coro_times_sub (SvSTATE (coro_current));
3975}
1112 3976
1113 case 2: 3977void
1114 prepare_schedule (&ta); 3978swap_sv (Coro::State coro, SV *sva, SV *svb)
1115 break; 3979 CODE:
3980{
3981 struct coro *current = SvSTATE_current;
3982 AV *swap_sv;
3983 int i;
1116 3984
1117 case 3: 3985 sva = SvRV (sva);
1118 prepare_cede (&ta); 3986 svb = SvRV (svb);
1119 break;
1120 3987
1121 case 4: 3988 if (current == coro)
3989 SWAP_SVS_LEAVE (current);
3990
3991 if (!coro->swap_sv)
3992 coro->swap_sv = newAV ();
3993
3994 swap_sv = coro->swap_sv;
3995
3996 for (i = AvFILLp (swap_sv) - 1; i >= 0; i -= 2)
3997 {
3998 SV *a = AvARRAY (swap_sv)[i ];
3999 SV *b = AvARRAY (swap_sv)[i + 1];
4000
4001 if (a == sva && b == svb)
1122 { 4002 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv); 4003 SvREFCNT_dec_NN (a);
4004 SvREFCNT_dec_NN (b);
4005
4006 for (; i <= AvFILLp (swap_sv) - 2; i++)
4007 AvARRAY (swap_sv)[i] = AvARRAY (swap_sv)[i + 2];
4008
4009 AvFILLp (swap_sv) -= 2;
4010
4011 goto removed;
1144 } 4012 }
1145 break;
1146
1147 } 4013 }
1148 4014
1149 TRANSFER (ta); 4015 av_push (swap_sv, SvREFCNT_inc_NN (sva));
1150} 4016 av_push (swap_sv, SvREFCNT_inc_NN (svb));
1151 4017
1152void 4018 removed:
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157 4019
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 4020 if (current == coro)
1159 4021 SWAP_SVS_ENTER (current);
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162} 4022}
1163 4023
1164void
1165_exit (code)
1166 int code
1167 PROTOTYPE: $
1168 CODE:
1169 _exit (code);
1170 4024
1171MODULE = Coro::State PACKAGE = Coro 4025MODULE = Coro::State PACKAGE = Coro
1172 4026
1173BOOT: 4027BOOT:
1174{ 4028{
1175 int i; 4029 if (SVt_LAST > 32)
4030 croak ("Coro internal error: SVt_LAST > 32, swap_sv might need adjustment");
1176 4031
4032 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
4033 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
4034 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
4035 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
4036 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
4037 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
4038 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
4039 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
4040
4041 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
4042 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
4043 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
4044 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
4045
1177 coro_stash = gv_stashpv ("Coro", TRUE); 4046 coro_stash = gv_stashpv ("Coro", TRUE);
1178 4047
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 4048 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 4049 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 4050 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 4051 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 4052 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 4053 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1185
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV ();
1191 4054
1192 { 4055 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 4056 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1194 4057
1195 coroapi.schedule = api_schedule; 4058 coroapi.schedule = api_schedule;
4059 coroapi.schedule_to = api_schedule_to;
1196 coroapi.cede = api_cede; 4060 coroapi.cede = api_cede;
4061 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 4062 coroapi.ready = api_ready;
4063 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 4064 coroapi.nready = coro_nready;
1199 coroapi.current = coro_current; 4065 coroapi.current = coro_current;
1200 4066
4067 coroapi.enterleave_hook = api_enterleave_hook;
4068 coroapi.enterleave_unhook = api_enterleave_unhook;
4069 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
4070
1201 GCoroAPI = &coroapi; 4071 /*GCoroAPI = &coroapi;*/
1202 sv_setiv (sv, (IV)&coroapi); 4072 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 4073 SvREADONLY_on (sv);
1204 } 4074 }
1205} 4075}
1206 4076
4077SV *
4078async (...)
4079 PROTOTYPE: &@
4080 CODE:
4081 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
4082 api_ready (aTHX_ RETVAL);
4083 OUTPUT:
4084 RETVAL
4085
4086void
4087_destroy (Coro::State coro)
4088 CODE:
4089 /* used by the manager thread */
4090 coro_state_destroy (aTHX_ coro);
4091
4092void
4093on_destroy (Coro::State coro, SV *cb)
4094 CODE:
4095 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4096
4097void
4098join (...)
4099 CODE:
4100 CORO_EXECUTE_SLF_XS (slf_init_join);
4101
4102void
4103terminate (...)
4104 CODE:
4105 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4106
4107void
4108cancel (...)
4109 CODE:
4110 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4111
4112int
4113safe_cancel (Coro::State self, ...)
4114 C_ARGS: aTHX_ self, &ST (1), items - 1
4115
4116void
4117schedule (...)
4118 CODE:
4119 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4120
4121void
4122schedule_to (...)
4123 CODE:
4124 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4125
4126void
4127cede_to (...)
4128 CODE:
4129 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4130
4131void
4132cede (...)
4133 CODE:
4134 CORO_EXECUTE_SLF_XS (slf_init_cede);
4135
4136void
4137cede_notself (...)
4138 CODE:
4139 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4140
4141void
4142_set_current (SV *current)
4143 PROTOTYPE: $
4144 CODE:
4145 SvREFCNT_dec_NN (SvRV (coro_current));
4146 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4147
4148void
4149_set_readyhook (SV *hook)
4150 PROTOTYPE: $
4151 CODE:
4152 SvREFCNT_dec (coro_readyhook);
4153 SvGETMAGIC (hook);
4154 if (SvOK (hook))
4155 {
4156 coro_readyhook = newSVsv (hook);
4157 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4158 }
4159 else
4160 {
4161 coro_readyhook = 0;
4162 CORO_READYHOOK = 0;
4163 }
4164
1207int 4165int
1208prio (Coro::State coro, int newprio = 0) 4166prio (Coro::State coro, int newprio = 0)
4167 PROTOTYPE: $;$
1209 ALIAS: 4168 ALIAS:
1210 nice = 1 4169 nice = 1
1211 CODE: 4170 CODE:
1212{ 4171{
1213 RETVAL = coro->prio; 4172 RETVAL = coro->prio;
1214 4173
1215 if (items > 1) 4174 if (items > 1)
1216 { 4175 {
1217 if (ix) 4176 if (ix)
1218 newprio += coro->prio; 4177 newprio = coro->prio - newprio;
1219 4178
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4179 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4180 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1222 4181
1223 coro->prio = newprio; 4182 coro->prio = newprio;
1224 } 4183 }
1225} 4184}
4185 OUTPUT:
4186 RETVAL
1226 4187
1227void 4188SV *
1228ready (SV *self) 4189ready (SV *self)
1229 PROTOTYPE: $ 4190 PROTOTYPE: $
1230 CODE: 4191 CODE:
1231 api_ready (self); 4192 RETVAL = boolSV (api_ready (aTHX_ self));
4193 OUTPUT:
4194 RETVAL
1232 4195
1233int 4196int
1234nready (...) 4197nready (...)
1235 PROTOTYPE: 4198 PROTOTYPE:
1236 CODE: 4199 CODE:
1237 RETVAL = coro_nready; 4200 RETVAL = coro_nready;
1238 OUTPUT: 4201 OUTPUT:
1239 RETVAL 4202 RETVAL
1240 4203
1241MODULE = Coro::State PACKAGE = Coro::AIO 4204void
4205suspend (Coro::State self)
4206 PROTOTYPE: $
4207 CODE:
4208 self->flags |= CF_SUSPENDED;
4209
4210void
4211resume (Coro::State self)
4212 PROTOTYPE: $
4213 CODE:
4214 self->flags &= ~CF_SUSPENDED;
4215
4216void
4217_pool_handler (...)
4218 CODE:
4219 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4220
4221void
4222async_pool (SV *cv, ...)
4223 PROTOTYPE: &@
4224 PPCODE:
4225{
4226 HV *hv = (HV *)av_pop (av_async_pool);
4227 AV *av = newAV ();
4228 SV *cb = ST (0);
4229 int i;
4230
4231 av_extend (av, items - 2);
4232 for (i = 1; i < items; ++i)
4233 av_push (av, SvREFCNT_inc_NN (ST (i)));
4234
4235 if ((SV *)hv == &PL_sv_undef)
4236 {
4237 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4238 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4239 SvREFCNT_dec_NN (sv);
4240 }
4241
4242 {
4243 struct coro *coro = SvSTATE_hv (hv);
4244
4245 assert (!coro->invoke_cb);
4246 assert (!coro->invoke_av);
4247 coro->invoke_cb = SvREFCNT_inc (cb);
4248 coro->invoke_av = av;
4249 }
4250
4251 api_ready (aTHX_ (SV *)hv);
4252
4253 if (GIMME_V != G_VOID)
4254 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4255 else
4256 SvREFCNT_dec_NN (hv);
4257}
1242 4258
1243SV * 4259SV *
1244_get_state () 4260rouse_cb ()
4261 PROTOTYPE:
1245 CODE: 4262 CODE:
1246{ 4263 RETVAL = coro_new_rouse_cb (aTHX);
1247 struct {
1248 int errorno;
1249 int laststype;
1250 int laststatval;
1251 Stat_t statcache;
1252 } data;
1253
1254 data.errorno = errno;
1255 data.laststype = PL_laststype;
1256 data.laststatval = PL_laststatval;
1257 data.statcache = PL_statcache;
1258
1259 RETVAL = newSVpvn ((char *)&data, sizeof data);
1260}
1261 OUTPUT: 4264 OUTPUT:
1262 RETVAL 4265 RETVAL
1263 4266
1264void 4267void
1265_set_state (char *data_) 4268rouse_wait (...)
4269 PROTOTYPE: ;$
4270 PPCODE:
4271 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4272
4273void
4274on_enter (SV *block)
4275 ALIAS:
4276 on_leave = 1
1266 PROTOTYPE: $ 4277 PROTOTYPE: &
1267 CODE: 4278 CODE:
1268{ 4279{
1269 struct { 4280 struct coro *coro = SvSTATE_current;
4281 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4282
4283 block = s_get_cv_croak (block);
4284
4285 if (!*avp)
4286 *avp = newAV ();
4287
4288 av_push (*avp, SvREFCNT_inc (block));
4289
4290 if (!ix)
4291 on_enterleave_call (aTHX_ block);
4292
4293 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4294 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4295 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4296}
4297
4298
4299MODULE = Coro::State PACKAGE = PerlIO::cede
4300
4301BOOT:
4302 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4303
4304
4305MODULE = Coro::State PACKAGE = Coro::Semaphore
4306
4307SV *
4308new (SV *klass, SV *count = 0)
4309 CODE:
4310{
4311 int semcnt = 1;
4312
4313 if (count)
4314 {
4315 SvGETMAGIC (count);
4316
4317 if (SvOK (count))
4318 semcnt = SvIV (count);
4319 }
4320
4321 RETVAL = sv_bless (
4322 coro_waitarray_new (aTHX_ semcnt),
4323 GvSTASH (CvGV (cv))
4324 );
4325}
4326 OUTPUT:
4327 RETVAL
4328
4329# helper for Coro::Channel and others
4330SV *
4331_alloc (int count)
4332 CODE:
4333 RETVAL = coro_waitarray_new (aTHX_ count);
4334 OUTPUT:
4335 RETVAL
4336
4337SV *
4338count (SV *self)
4339 CODE:
4340 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4341 OUTPUT:
4342 RETVAL
4343
4344void
4345up (SV *self)
4346 CODE:
4347 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), 1);
4348
4349void
4350adjust (SV *self, int adjust)
4351 CODE:
4352 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), adjust);
4353
4354void
4355down (...)
4356 CODE:
4357 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4358
4359void
4360wait (...)
4361 CODE:
4362 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4363
4364void
4365try (SV *self)
4366 PPCODE:
4367{
4368 AV *av = (AV *)SvRV (self);
4369 SV *count_sv = AvARRAY (av)[0];
4370 IV count = SvIVX (count_sv);
4371
4372 if (count > 0)
4373 {
4374 --count;
4375 SvIVX (count_sv) = count;
4376 XSRETURN_YES;
4377 }
4378 else
4379 XSRETURN_NO;
4380}
4381
4382void
4383waiters (SV *self)
4384 PPCODE:
4385{
4386 AV *av = (AV *)SvRV (self);
4387 int wcount = AvFILLp (av) + 1 - 1;
4388
4389 if (GIMME_V == G_SCALAR)
4390 XPUSHs (sv_2mortal (newSViv (wcount)));
4391 else
4392 {
1270 int errorno; 4393 int i;
1271 int laststype; 4394 EXTEND (SP, wcount);
1272 int laststatval; 4395 for (i = 1; i <= wcount; ++i)
1273 Stat_t statcache; 4396 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1274 } *data = (void *)data_; 4397 }
1275
1276 errno = data->errorno;
1277 PL_laststype = data->laststype;
1278 PL_laststatval = data->laststatval;
1279 PL_statcache = data->statcache;
1280} 4398}
4399
4400MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4401
4402void
4403_may_delete (SV *sem, int count, unsigned int extra_refs)
4404 PPCODE:
4405{
4406 AV *av = (AV *)SvRV (sem);
4407
4408 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4409 && AvFILLp (av) == 0 /* no waiters, just count */
4410 && SvIV (AvARRAY (av)[0]) == count)
4411 XSRETURN_YES;
4412
4413 XSRETURN_NO;
4414}
4415
4416MODULE = Coro::State PACKAGE = Coro::Signal
4417
4418SV *
4419new (SV *klass)
4420 CODE:
4421 RETVAL = sv_bless (
4422 coro_waitarray_new (aTHX_ 0),
4423 GvSTASH (CvGV (cv))
4424 );
4425 OUTPUT:
4426 RETVAL
4427
4428void
4429wait (...)
4430 CODE:
4431 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4432
4433void
4434broadcast (SV *self)
4435 CODE:
4436{
4437 AV *av = (AV *)SvRV (self);
4438 coro_signal_wake (aTHX_ av, AvFILLp (av));
4439}
4440
4441void
4442send (SV *self)
4443 CODE:
4444{
4445 AV *av = (AV *)SvRV (self);
4446
4447 if (AvFILLp (av))
4448 coro_signal_wake (aTHX_ av, 1);
4449 else
4450 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4451}
4452
4453IV
4454awaited (SV *self)
4455 CODE:
4456 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4457 OUTPUT:
4458 RETVAL
4459
4460
4461MODULE = Coro::State PACKAGE = Coro::AnyEvent
4462
4463BOOT:
4464 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4465
4466void
4467_schedule (...)
4468 CODE:
4469{
4470 static int incede;
4471
4472 api_cede_notself (aTHX);
4473
4474 ++incede;
4475 while (coro_nready >= incede && api_cede (aTHX))
4476 ;
4477
4478 sv_setsv (sv_activity, &PL_sv_undef);
4479 if (coro_nready >= incede)
4480 {
4481 PUSHMARK (SP);
4482 PUTBACK;
4483 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4484 }
4485
4486 --incede;
4487}
4488
4489
4490MODULE = Coro::State PACKAGE = Coro::AIO
4491
4492void
4493_register (char *target, char *proto, SV *req)
4494 CODE:
4495{
4496 SV *req_cv = s_get_cv_croak (req);
4497 /* newXSproto doesn't return the CV on 5.8 */
4498 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4499 sv_setpv ((SV *)slf_cv, proto);
4500 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4501}
4502
4503MODULE = Coro::State PACKAGE = Coro::Select
4504
4505void
4506patch_pp_sselect ()
4507 CODE:
4508 if (!coro_old_pp_sselect)
4509 {
4510 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4511 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4512 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4513 }
4514
4515void
4516unpatch_pp_sselect ()
4517 CODE:
4518 if (coro_old_pp_sselect)
4519 {
4520 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4521 coro_old_pp_sselect = 0;
4522 }
4523
4524MODULE = Coro::State PACKAGE = Coro::Util
4525
4526void
4527_exit (int code)
4528 CODE:
4529 _exit (code);
4530
4531NV
4532time ()
4533 CODE:
4534 RETVAL = nvtime (aTHX);
4535 OUTPUT:
4536 RETVAL
4537
4538NV
4539gettimeofday ()
4540 PPCODE:
4541{
4542 UV tv [2];
4543 u2time (aTHX_ tv);
4544 EXTEND (SP, 2);
4545 PUSHs (sv_2mortal (newSVuv (tv [0])));
4546 PUSHs (sv_2mortal (newSVuv (tv [1])));
4547}
4548

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