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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.119 by root, Sat Dec 2 15:41:28 2006 UTC vs.
Revision 1.451 by root, Mon Jun 29 23:49:34 2015 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/* the maximum number of idle cctx that will be pooled */ 22#include <stddef.h>
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42
43#include <stdio.h> 23#include <stdio.h>
44#include <errno.h> 24#include <errno.h>
45
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47# undef STACKGUARD
48#endif
49
50#ifndef STACKGUARD
51# define STACKGUARD 0
52#endif
53
54#ifdef HAVE_MMAP
55# include <unistd.h> 25#include <assert.h>
56# include <sys/mman.h> 26
57# ifndef MAP_ANONYMOUS 27#ifndef SvREFCNT_dec_NN
58# ifdef MAP_ANON 28 #define SvREFCNT_dec_NN(sv) SvREFCNT_dec (sv)
59# define MAP_ANONYMOUS MAP_ANON
60# else
61# undef HAVE_MMAP
62# 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;
63# endif 47# endif
64# include <limits.h> 48# define PadlistARRAY(pl) ((PAD **)AvARRAY (pl))
65# ifndef PAGESIZE 49# define PadlistMAX(pl) AvFILLp (pl)
66# define PAGESIZE pagesize 50# define PadlistNAMES(pl) (*PadlistARRAY (pl))
67# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 51# define PadARRAY AvARRAY
68static 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 */
69# else 74#else
70# define BOOT_PAGESIZE (void)0 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;
71# endif 108# endif
72#else 109#endif
73# define PAGESIZE 0 110
74# define BOOT_PAGESIZE (void)0 111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
75#endif 118# endif
76
77/* The next macro should declare a variable stacklevel that contains and approximation
78 * to the current C stack pointer. Its property is that it changes with each call
79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
81#define STACKLEVEL ((void *)&stacklevel)
82
83#define IN_DESTRUCT (PL_main_cv == Nullcv)
84
85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif 119#endif
90 120
91#define NOINLINE attribute ((noinline)) 121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
92 123
93#include "CoroAPI.h" 124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127static void slf_destroy (pTHX_ struct coro *coro);
94 128
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */ 129static U32 cctx_gen;
96 130static size_t cctx_stacksize = CORO_STACKSIZE;
97#ifdef USE_ITHREADS
98static perl_mutex coro_mutex;
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif
105
106static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
107static AV *main_mainstack; /* used to differentiate between $main and others */ 132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
108static HV *coro_state_stash, *coro_stash; 134static HV *coro_state_stash, *coro_stash;
109static SV *coro_mortal; /* will be freed after next transfer */ 135static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136
137static AV *av_destroy; /* destruction queue */
138static SV *sv_manager; /* the manager coro */
139static SV *sv_idle; /* $Coro::idle */
140
141static GV *irsgv; /* $/ */
142static GV *stdoutgv; /* *STDOUT */
143static SV *rv_diehook;
144static SV *rv_warnhook;
145static HV *hv_sig; /* %SIG */
146
147/* async_pool helper stuff */
148static SV *sv_pool_rss;
149static SV *sv_pool_size;
150static SV *sv_async_pool_idle; /* description string */
151static AV *av_async_pool; /* idle pool */
152static SV *sv_Coro; /* class string */
153static CV *cv_pool_handler;
154
155/* Coro::AnyEvent */
156static SV *sv_activity;
157
158/* enable processtime/realtime profiling */
159static char enable_times;
160typedef U32 coro_ts[2];
161static coro_ts time_real, time_cpu;
162static char times_valid;
110 163
111static struct coro_cctx *cctx_first; 164static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 165static int cctx_count, cctx_idle;
113 166
167enum
168{
169 CC_MAPPED = 0x01,
170 CC_NOREUSE = 0x02, /* throw this away after tracing */
171 CC_TRACE = 0x04,
172 CC_TRACE_SUB = 0x08, /* trace sub calls */
173 CC_TRACE_LINE = 0x10, /* trace each statement */
174 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
175};
176
114/* this is a structure representing a c-level coroutine */ 177/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 178typedef struct coro_cctx
179{
116 struct coro_cctx *next; 180 struct coro_cctx *next;
117 181
118 /* the stack */ 182 /* the stack */
119 void *sptr; 183 struct coro_stack stack;
120 long ssize; /* positive == mmap, otherwise malloc */
121 184
122 /* cpu state */ 185 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 186 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
187#ifndef NDEBUG
188 JMPENV *idle_te; /* same as idle_sp, but for top_env */
189#endif
124 JMPENV *top_env; 190 JMPENV *top_env;
125 coro_context cctx; 191 coro_context cctx;
126 192
127 int inuse; 193 U32 gen;
128
129#if USE_VALGRIND 194#if CORO_USE_VALGRIND
130 int valgrind_id; 195 int valgrind_id;
131#endif 196#endif
197 unsigned char flags;
132} coro_cctx; 198} coro_cctx;
133 199
200static coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204static MGVTBL coro_state_vtbl;
205
134enum { 206enum
207{
135 CF_RUNNING = 0x0001, /* coroutine is running */ 208 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY = 0x0002, /* coroutine is ready */ 209 CF_READY = 0x0002, /* coroutine is ready */
137 CF_NEW = 0x0004, /* ahs never been switched to */ 210 CF_NEW = 0x0004, /* has never been switched to */
211 CF_ZOMBIE = 0x0008, /* coroutine data has been freed */
212 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
213 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
138}; 214};
139 215
216/* the structure where most of the perl state is stored, overlaid on the cxstack */
217typedef struct
218{
219 #define VARx(name,expr,type) type name;
220 #include "state.h"
221} perl_slots;
222
223/* how many context stack entries do we need for perl_slots */
224#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
225
140/* this is a structure representing a perl-level coroutine */ 226/* this is a structure representing a perl-level coroutine */
141struct coro { 227struct coro
228{
142 /* the c coroutine allocated to this perl coroutine, if any */ 229 /* the C coroutine allocated to this perl coroutine, if any */
143 coro_cctx *cctx; 230 coro_cctx *cctx;
144 231
232 /* ready queue */
233 struct coro *next_ready;
234
235 /* state data */
236 struct CoroSLF slf_frame; /* saved slf frame */
237 AV *mainstack;
238 perl_slots *slot; /* basically the saved sp */
239
240 CV *startcv; /* the CV to execute */
145 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
146 AV *args; 242 int flags; /* CF_ flags */
147 int refcnt; 243 HV *hv; /* the perl hash associated with this coro, if any */
148 int flags;
149 244
150 /* optionally saved, might be zero */ 245 /* statistics */
151 AV *defav; 246 int usecount; /* number of transfers to this coro */
152 SV *defsv;
153 SV *errsv;
154
155#define VAR(name,type) type name;
156# include "state.h"
157#undef VAR
158 247
159 /* coro process data */ 248 /* coro process data */
160 int prio; 249 int prio;
250 SV *except; /* exception to be thrown */
251 SV *rouse_cb; /* last rouse callback */
252 AV *on_destroy; /* callbacks or coros to notify on destroy */
253 AV *status; /* the exit status list */
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter; AV *on_enter_xs;
262 AV *on_leave; AV *on_leave_xs;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
161}; 272};
162 273
163typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
164typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
165 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the main reason we don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** JIT *********************************************************************/
300
301#if CORO_JIT
302 /* APPLE doesn't have mmap though */
303 #define CORO_JIT_UNIXY (__linux || __FreeBSD__ || __OpenBSD__ || __NetBSD__ || __solaris || __APPLE__)
304 #ifndef CORO_JIT_TYPE
305 #if ECB_AMD64 && CORO_JIT_UNIXY
306 #define CORO_JIT_TYPE "amd64-unix"
307 #elif __i386 && CORO_JIT_UNIXY
308 #define CORO_JIT_TYPE "x86-unix"
309 #endif
310 #endif
311#endif
312
313#if !defined(CORO_JIT_TYPE) || _POSIX_MEMORY_PROTECTION <= 0
314 #undef CORO_JIT
315#endif
316
317#if CORO_JIT
318 typedef void (*load_save_perl_slots_type)(perl_slots *);
319 static load_save_perl_slots_type load_perl_slots, save_perl_slots;
320#endif
321
322/** Coro::Select ************************************************************/
323
324static OP *(*coro_old_pp_sselect) (pTHX);
325static SV *coro_select_select;
326
327/* horrible hack, but if it works... */
166static AV * 328static OP *
329coro_pp_sselect (pTHX)
330{
331 dSP;
332 PUSHMARK (SP - 4); /* fake argument list */
333 XPUSHs (coro_select_select);
334 PUTBACK;
335
336 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
337 PL_op->op_flags |= OPf_STACKED;
338 PL_op->op_private = 0;
339 return PL_ppaddr [OP_ENTERSUB](aTHX);
340}
341
342/** time stuff **************************************************************/
343
344#ifdef HAS_GETTIMEOFDAY
345
346ecb_inline void
347coro_u2time (pTHX_ UV ret[2])
348{
349 struct timeval tv;
350 gettimeofday (&tv, 0);
351
352 ret [0] = tv.tv_sec;
353 ret [1] = tv.tv_usec;
354}
355
356ecb_inline double
357coro_nvtime (void)
358{
359 struct timeval tv;
360 gettimeofday (&tv, 0);
361
362 return tv.tv_sec + tv.tv_usec * 1e-6;
363}
364
365ecb_inline void
366time_init (pTHX)
367{
368 nvtime = coro_nvtime;
369 u2time = coro_u2time;
370}
371
372#else
373
374ecb_inline void
375time_init (pTHX)
376{
377 SV **svp;
378
379 require_pv ("Time/HiRes.pm");
380
381 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
382
383 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
384 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
385
386 nvtime = INT2PTR (double (*)(), SvIV (*svp));
387
388 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
389 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
390}
391
392#endif
393
394/** lowlevel stuff **********************************************************/
395
396static SV * ecb_noinline
397coro_get_sv (pTHX_ const char *name, int create)
398{
399#if PERL_VERSION_ATLEAST (5,10,0)
400 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
401 get_sv (name, create);
402#endif
403 return get_sv (name, create);
404}
405
406static AV * ecb_noinline
407coro_get_av (pTHX_ const char *name, int create)
408{
409#if PERL_VERSION_ATLEAST (5,10,0)
410 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
411 get_av (name, create);
412#endif
413 return get_av (name, create);
414}
415
416static HV * ecb_noinline
417coro_get_hv (pTHX_ const char *name, int create)
418{
419#if PERL_VERSION_ATLEAST (5,10,0)
420 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
421 get_hv (name, create);
422#endif
423 return get_hv (name, create);
424}
425
426ecb_inline void
427coro_times_update (void)
428{
429#ifdef coro_clock_gettime
430 struct timespec ts;
431
432 ts.tv_sec = ts.tv_nsec = 0;
433 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
434 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
435
436 ts.tv_sec = ts.tv_nsec = 0;
437 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
438 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
439#else
440 dTHX;
441 UV tv[2];
442
443 u2time (aTHX_ tv);
444 time_real [0] = tv [0];
445 time_real [1] = tv [1] * 1000;
446#endif
447}
448
449ecb_inline void
450coro_times_add (struct coro *c)
451{
452 c->t_real [1] += time_real [1];
453 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
454 c->t_real [0] += time_real [0];
455
456 c->t_cpu [1] += time_cpu [1];
457 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
458 c->t_cpu [0] += time_cpu [0];
459}
460
461ecb_inline void
462coro_times_sub (struct coro *c)
463{
464 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
465 c->t_real [1] -= time_real [1];
466 c->t_real [0] -= time_real [0];
467
468 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
469 c->t_cpu [1] -= time_cpu [1];
470 c->t_cpu [0] -= time_cpu [0];
471}
472
473/*****************************************************************************/
474/* magic glue */
475
476#define CORO_MAGIC_type_cv 26
477#define CORO_MAGIC_type_state PERL_MAGIC_ext
478
479#define CORO_MAGIC_NN(sv, type) \
480 (ecb_expect_true (SvMAGIC (sv)->mg_type == type) \
481 ? SvMAGIC (sv) \
482 : mg_find (sv, type))
483
484#define CORO_MAGIC(sv, type) \
485 (ecb_expect_true (SvMAGIC (sv)) \
486 ? CORO_MAGIC_NN (sv, type) \
487 : 0)
488
489#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
490#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
491
492ecb_inline MAGIC *
493SvSTATEhv_p (pTHX_ SV *coro)
494{
495 MAGIC *mg;
496
497 if (ecb_expect_true (
498 SvTYPE (coro) == SVt_PVHV
499 && (mg = CORO_MAGIC_state (coro))
500 && mg->mg_virtual == &coro_state_vtbl
501 ))
502 return mg;
503
504 return 0;
505}
506
507ecb_inline struct coro *
508SvSTATE_ (pTHX_ SV *coro_sv)
509{
510 MAGIC *mg;
511
512 if (SvROK (coro_sv))
513 coro_sv = SvRV (coro_sv);
514
515 mg = SvSTATEhv_p (aTHX_ coro_sv);
516 if (!mg)
517 croak ("Coro::State object required");
518
519 return (struct coro *)mg->mg_ptr;
520}
521
522#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
523
524/* faster than SvSTATE, but expects a coroutine hv */
525#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
526#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
527
528/*****************************************************************************/
529/* padlist management and caching */
530
531ecb_inline PADLIST *
167coro_clone_padlist (CV *cv) 532coro_derive_padlist (pTHX_ CV *cv)
168{ 533{
169 AV *padlist = CvPADLIST (cv); 534 PADLIST *padlist = CvPADLIST (cv);
170 AV *newpadlist, *newpad; 535 PADLIST *newpadlist;
536 PADNAMELIST *padnames;
537 PAD *newpad;
538 PADOFFSET off = PadlistMAX (padlist) + 1;
171 539
172 newpadlist = newAV (); 540#if NEWPADAPI
541
542 /* if we had the original CvDEPTH, we might be able to steal the CvDEPTH+1 entry instead */
543 /* 20131102194744.GA6705@schmorp.de, 20131102195825.2013.qmail@lists-nntp.develooper.com */
544 while (!PadlistARRAY (padlist)[off - 1])
545 --off;
546
547 Perl_pad_push (aTHX_ padlist, off);
548
549 newpad = PadlistARRAY (padlist)[off];
550 PadlistARRAY (padlist)[off] = 0;
551
552#else
553
554#if PERL_VERSION_ATLEAST (5,10,0)
555 Perl_pad_push (aTHX_ padlist, off);
556#else
557 Perl_pad_push (aTHX_ padlist, off, 1);
558#endif
559
560 newpad = PadlistARRAY (padlist)[off];
561 PadlistMAX (padlist) = off - 1;
562
563#endif
564
565 newPADLIST (newpadlist);
566#if !PERL_VERSION_ATLEAST(5,15,3)
567 /* Padlists are AvREAL as of 5.15.3. See perl bug #98092 and perl commit 7d953ba. */
173 AvREAL_off (newpadlist); 568 AvREAL_off (newpadlist);
174#if PERL_VERSION_ATLEAST (5,9,0)
175 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
176#else
177 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
178#endif 569#endif
179 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
180 --AvFILLp (padlist);
181 570
182 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 571 /* Already extended to 2 elements by newPADLIST. */
183 av_store (newpadlist, 1, (SV *)newpad); 572 PadlistMAX (newpadlist) = 1;
573
574 padnames = PadlistNAMES (padlist);
575 ++PadnamelistREFCNT (padnames);
576 PadlistNAMES (newpadlist) = padnames;
577
578 PadlistARRAY (newpadlist)[1] = newpad;
184 579
185 return newpadlist; 580 return newpadlist;
186} 581}
187 582
188static void 583ecb_inline void
189free_padlist (AV *padlist) 584free_padlist (pTHX_ PADLIST *padlist)
190{ 585{
191 /* may be during global destruction */ 586 /* may be during global destruction */
192 if (SvREFCNT (padlist)) 587 if (!IN_DESTRUCT)
193 { 588 {
194 I32 i = AvFILLp (padlist); 589 I32 i = PadlistMAX (padlist);
195 while (i >= 0) 590
591 while (i > 0) /* special-case index 0 */
196 { 592 {
197 SV **svp = av_fetch (padlist, i--, FALSE); 593 /* we try to be extra-careful here */
594 PAD *pad = PadlistARRAY (padlist)[i--];
595
198 if (svp) 596 if (pad)
199 { 597 {
200 SV *sv; 598 I32 j = PadMAX (pad);
201 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 599
600 while (j >= 0)
202 SvREFCNT_dec (sv); 601 SvREFCNT_dec (PadARRAY (pad)[j--]);
203 602
603 PadMAX (pad) = -1;
204 SvREFCNT_dec (*svp); 604 SvREFCNT_dec (pad);
205 } 605 }
206 } 606 }
207 607
608 PadnamelistREFCNT_dec (PadlistNAMES (padlist));
609
610#if NEWPADAPI
611 Safefree (PadlistARRAY (padlist));
612 Safefree (padlist);
613#else
614 AvFILLp (padlist) = -1;
615 AvREAL_off (padlist);
208 SvREFCNT_dec ((SV*)padlist); 616 SvREFCNT_dec ((SV*)padlist);
617#endif
209 } 618 }
210} 619}
211 620
212static int 621static int
213coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 622coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
214{ 623{
215 AV *padlist; 624 PADLIST *padlist;
216 AV *av = (AV *)mg->mg_obj; 625 PADLIST **padlists = (PADLIST **)(mg->mg_ptr + sizeof(size_t));
626 size_t len = *(size_t *)mg->mg_ptr;
217 627
218 /* casting is fun. */ 628 /* perl manages to free our internal AV and _then_ call us */
219 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 629 if (IN_DESTRUCT)
630 return 0;
631
632 while (len--)
220 free_padlist (padlist); 633 free_padlist (aTHX_ padlists[len]);
221
222 SvREFCNT_dec (av);
223 634
224 return 0; 635 return 0;
225} 636}
226 637
227#define PERL_MAGIC_coro PERL_MAGIC_ext 638static MGVTBL coro_cv_vtbl = {
228 639 0, 0, 0, 0,
229static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 640 coro_cv_free
230 641};
231#define CORO_MAGIC(cv) \
232 SvMAGIC (cv) \
233 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234 ? SvMAGIC (cv) \
235 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
236 : 0
237 642
238/* the next two functions merely cache the padlists */ 643/* the next two functions merely cache the padlists */
239static void 644ecb_inline void
240get_padlist (CV *cv) 645get_padlist (pTHX_ CV *cv)
241{ 646{
242 MAGIC *mg = CORO_MAGIC (cv); 647 MAGIC *mg = CORO_MAGIC_cv (cv);
243 AV *av; 648 size_t *lenp;
244 649
245 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 650 if (ecb_expect_true (mg && *(lenp = (size_t *)mg->mg_ptr)))
246 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 651 CvPADLIST (cv) = ((PADLIST **)(mg->mg_ptr + sizeof(size_t)))[--*lenp];
247 else 652 else
248 { 653 {
249#if 0 654#if CORO_PREFER_PERL_FUNCTIONS
250 /* this is probably cleaner, but also slower? */ 655 /* this is probably cleaner? but also slower! */
656 /* in practise, it seems to be less stable */
251 CV *cp = Perl_cv_clone (cv); 657 CV *cp = Perl_cv_clone (aTHX_ cv);
252 CvPADLIST (cv) = CvPADLIST (cp); 658 CvPADLIST (cv) = CvPADLIST (cp);
253 CvPADLIST (cp) = 0; 659 CvPADLIST (cp) = 0;
254 SvREFCNT_dec (cp); 660 SvREFCNT_dec (cp);
255#else 661#else
256 CvPADLIST (cv) = coro_clone_padlist (cv); 662 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
257#endif 663#endif
258 } 664 }
259} 665}
260 666
261static void 667ecb_inline void
262put_padlist (CV *cv) 668put_padlist (pTHX_ CV *cv)
263{ 669{
264 MAGIC *mg = CORO_MAGIC (cv); 670 MAGIC *mg = CORO_MAGIC_cv (cv);
265 AV *av;
266 671
267 if (!mg) 672 if (ecb_expect_false (!mg))
268 {
269 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
270 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
271 mg->mg_virtual = &vtbl_coro;
272 mg->mg_obj = (SV *)newAV ();
273 } 673 {
674 mg = sv_magicext ((SV *)cv, 0, CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
675 Newz (0, mg->mg_ptr ,sizeof (size_t) + sizeof (PADLIST *), char);
676 mg->mg_len = 1; /* so mg_free frees mg_ptr */
677 }
678 else
679 Renew (mg->mg_ptr,
680 sizeof(size_t) + (*(size_t *)mg->mg_ptr + 1) * sizeof(PADLIST *),
681 char);
274 682
275 av = (AV *)mg->mg_obj; 683 ((PADLIST **)(mg->mg_ptr + sizeof (size_t))) [(*(size_t *)mg->mg_ptr)++] = CvPADLIST (cv);
276
277 if (AvFILLp (av) >= AvMAX (av))
278 av_extend (av, AvMAX (av) + 1);
279
280 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281} 684}
282 685
283#define SB do { 686/** load & save, init *******************************************************/
284#define SE } while (0)
285 687
286#define LOAD(state) load_state ((state)) 688ecb_inline void
287#define SAVE(state,flags) save_state ((state),(flags)) 689swap_sv (SV *a, SV *b)
690{
691 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
692 SV tmp;
288 693
289#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE 694 /* swap sv_any */
695 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
290 696
697 /* swap sv_flags */
698 SvFLAGS (&tmp) = SvFLAGS (a);
699 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
700 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
701
702#if PERL_VERSION_ATLEAST (5,10,0)
703 /* perl 5.10 and later complicates this _quite_ a bit, but it also
704 * is much faster, so no quarrels here. alternatively, we could
705 * sv_upgrade to avoid this.
706 */
707 {
708 /* swap sv_u */
709 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
710
711 /* if SvANY points to the head, we need to adjust the pointers,
712 * as the pointer for a still points to b, and maybe vice versa.
713 */
714 #define svany_in_head(type) \
715 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
716
717 if (svany_in_head (SvTYPE (a)))
718 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
719
720 if (svany_in_head (SvTYPE (b)))
721 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
722 }
723#endif
724}
725
726/* swap sv heads, at least logically */
291static void 727static void
728swap_svs (pTHX_ Coro__State c)
729{
730 int i;
731
732 for (i = 0; i <= AvFILLp (c->swap_sv); i += 2)
733 swap_sv (AvARRAY (c->swap_sv)[i], AvARRAY (c->swap_sv)[i + 1]);
734}
735
736#define SWAP_SVS(coro) \
737 if (ecb_expect_false ((coro)->swap_sv)) \
738 swap_svs (aTHX_ (coro))
739
740static void
741on_enterleave_call (pTHX_ SV *cb);
742
743static void
292load_state (Coro__State c) 744load_perl (pTHX_ Coro__State c)
293{ 745{
294#define VAR(name,type) PL_ ## name = c->name; 746 perl_slots *slot = c->slot;
747 c->slot = 0;
748
749 PL_mainstack = c->mainstack;
750
751#if CORO_JIT
752 load_perl_slots (slot);
753#else
754 #define VARx(name,expr,type) expr = slot->name;
295# include "state.h" 755 #include "state.h"
296#undef VAR 756#endif
297
298 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
301 757
302 { 758 {
303 dSP; 759 dSP;
760
304 CV *cv; 761 CV *cv;
305 762
306 /* now do the ugly restore mess */ 763 /* now do the ugly restore mess */
307 while ((cv = (CV *)POPs)) 764 while (ecb_expect_true (cv = (CV *)POPs))
308 { 765 {
309 put_padlist (cv); /* mark this padlist as available */ 766 put_padlist (aTHX_ cv); /* mark this padlist as available */
310 CvDEPTH (cv) = PTR2IV (POPs); 767 CvDEPTH (cv) = PTR2IV (POPs);
311 CvPADLIST (cv) = (AV *)POPs; 768 CvPADLIST (cv) = (PADLIST *)POPs;
312 } 769 }
313 770
314 PUTBACK; 771 PUTBACK;
315 } 772 }
316}
317 773
774 slf_frame = c->slf_frame;
775 CORO_THROW = c->except;
776
777 if (ecb_expect_false (enable_times))
778 {
779 if (ecb_expect_false (!times_valid))
780 coro_times_update ();
781
782 coro_times_sub (c);
783 }
784
785 if (ecb_expect_false (c->on_enter))
786 {
787 int i;
788
789 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
790 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
791 }
792
793 if (ecb_expect_false (c->on_enter_xs))
794 {
795 int i;
796
797 for (i = 0; i <= AvFILLp (c->on_enter_xs); i += 2)
798 ((coro_enterleave_hook)AvARRAY (c->on_enter_xs)[i]) (aTHX_ AvARRAY (c->on_enter_xs)[i + 1]);
799 }
800
801 SWAP_SVS (c);
802}
803
318static void 804static void
319save_state (Coro__State c, int flags) 805save_perl (pTHX_ Coro__State c)
320{ 806{
807 SWAP_SVS (c);
808
809 if (ecb_expect_false (c->on_leave_xs))
810 {
811 int i;
812
813 for (i = AvFILLp (c->on_leave_xs) - 1; i >= 0; i -= 2)
814 ((coro_enterleave_hook)AvARRAY (c->on_leave_xs)[i]) (aTHX_ AvARRAY (c->on_leave_xs)[i + 1]);
815 }
816
817 if (ecb_expect_false (c->on_leave))
818 {
819 int i;
820
821 for (i = AvFILLp (c->on_leave); i >= 0; --i)
822 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
823 }
824
825 times_valid = 0;
826
827 if (ecb_expect_false (enable_times))
828 {
829 coro_times_update (); times_valid = 1;
830 coro_times_add (c);
831 }
832
833 c->except = CORO_THROW;
834 c->slf_frame = slf_frame;
835
321 { 836 {
322 dSP; 837 dSP;
323 I32 cxix = cxstack_ix; 838 I32 cxix = cxstack_ix;
324 PERL_CONTEXT *ccstk = cxstack; 839 PERL_CONTEXT *ccstk = cxstack;
325 PERL_SI *top_si = PL_curstackinfo; 840 PERL_SI *top_si = PL_curstackinfo;
… …
327 /* 842 /*
328 * the worst thing you can imagine happens first - we have to save 843 * the worst thing you can imagine happens first - we have to save
329 * (and reinitialize) all cv's in the whole callchain :( 844 * (and reinitialize) all cv's in the whole callchain :(
330 */ 845 */
331 846
332 PUSHs (Nullsv); 847 XPUSHs (Nullsv);
333 /* this loop was inspired by pp_caller */ 848 /* this loop was inspired by pp_caller */
334 for (;;) 849 for (;;)
335 { 850 {
336 while (cxix >= 0) 851 while (ecb_expect_true (cxix >= 0))
337 { 852 {
338 PERL_CONTEXT *cx = &ccstk[cxix--]; 853 PERL_CONTEXT *cx = &ccstk[cxix--];
339 854
340 if (CxTYPE (cx) == CXt_SUB) 855 if (ecb_expect_true (CxTYPE (cx) == CXt_SUB) || ecb_expect_false (CxTYPE (cx) == CXt_FORMAT))
341 { 856 {
342 CV *cv = cx->blk_sub.cv; 857 CV *cv = cx->blk_sub.cv;
343 858
344 if (CvDEPTH (cv)) 859 if (ecb_expect_true (CvDEPTH (cv)))
345 { 860 {
346 EXTEND (SP, 3); 861 EXTEND (SP, 3);
347
348 PUSHs ((SV *)CvPADLIST (cv)); 862 PUSHs ((SV *)CvPADLIST (cv));
349 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 863 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
350 PUSHs ((SV *)cv); 864 PUSHs ((SV *)cv);
351 865
352 CvDEPTH (cv) = 0; 866 CvDEPTH (cv) = 0;
353 get_padlist (cv); 867 get_padlist (aTHX_ cv);
354 } 868 }
355 } 869 }
356#ifdef CXt_FORMAT
357 else if (CxTYPE (cx) == CXt_FORMAT)
358 {
359 /* I never used formats, so how should I know how these are implemented? */
360 /* my bold guess is as a simple, plain sub... */
361 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362 }
363#endif
364 } 870 }
365 871
366 if (top_si->si_type == PERLSI_MAIN) 872 if (ecb_expect_true (top_si->si_type == PERLSI_MAIN))
367 break; 873 break;
368 874
369 top_si = top_si->si_prev; 875 top_si = top_si->si_prev;
370 ccstk = top_si->si_cxstack; 876 ccstk = top_si->si_cxstack;
371 cxix = top_si->si_cxix; 877 cxix = top_si->si_cxix;
372 } 878 }
373 879
374 PUTBACK; 880 PUTBACK;
375 } 881 }
376 882
377 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 883 /* allocate some space on the context stack for our purposes */
378 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 884 if (ecb_expect_false (cxstack_ix + (int)SLOT_COUNT >= cxstack_max))
379 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 885 {
886 unsigned int i;
380 887
381#define VAR(name,type)c->name = PL_ ## name; 888 for (i = 0; i < SLOT_COUNT; ++i)
889 CXINC;
890
891 cxstack_ix -= SLOT_COUNT; /* undo allocation */
892 }
893
894 c->mainstack = PL_mainstack;
895
896 {
897 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
898
899#if CORO_JIT
900 save_perl_slots (slot);
901#else
902 #define VARx(name,expr,type) slot->name = expr;
382# include "state.h" 903 #include "state.h"
383#undef VAR 904#endif
905 }
384} 906}
385 907
386/* 908/*
387 * allocate various perl stacks. This is an exact copy 909 * allocate various perl stacks. This is almost an exact copy
388 * of perl.c:init_stacks, except that it uses less memory 910 * of perl.c:init_stacks, except that it uses less memory
389 * on the (sometimes correct) assumption that coroutines do 911 * on the (sometimes correct) assumption that coroutines do
390 * not usually need a lot of stackspace. 912 * not usually need a lot of stackspace.
391 */ 913 */
914#if CORO_PREFER_PERL_FUNCTIONS
915# define coro_init_stacks(thx) init_stacks ()
916#else
392static void 917static void
393coro_init_stacks () 918coro_init_stacks (pTHX)
394{ 919{
395 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 920 PL_curstackinfo = new_stackinfo(32, 4 + SLOT_COUNT); /* 3 is minimum due to perl rounding down in scope.c:GROW() */
396 PL_curstackinfo->si_type = PERLSI_MAIN; 921 PL_curstackinfo->si_type = PERLSI_MAIN;
397 PL_curstack = PL_curstackinfo->si_stack; 922 PL_curstack = PL_curstackinfo->si_stack;
398 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 923 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399 924
400 PL_stack_base = AvARRAY(PL_curstack); 925 PL_stack_base = AvARRAY(PL_curstack);
401 PL_stack_sp = PL_stack_base; 926 PL_stack_sp = PL_stack_base;
402 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 927 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403 928
404 New(50,PL_tmps_stack,128,SV*); 929 New(50,PL_tmps_stack,32,SV*);
405 PL_tmps_floor = -1; 930 PL_tmps_floor = -1;
406 PL_tmps_ix = -1; 931 PL_tmps_ix = -1;
407 PL_tmps_max = 128; 932 PL_tmps_max = 32;
408 933
409 New(54,PL_markstack,32,I32); 934 New(54,PL_markstack,16,I32);
410 PL_markstack_ptr = PL_markstack; 935 PL_markstack_ptr = PL_markstack;
411 PL_markstack_max = PL_markstack + 32; 936 PL_markstack_max = PL_markstack + 16;
412 937
413#ifdef SET_MARK_OFFSET 938#ifdef SET_MARK_OFFSET
414 SET_MARK_OFFSET; 939 SET_MARK_OFFSET;
415#endif 940#endif
416 941
417 New(54,PL_scopestack,32,I32); 942 New(54,PL_scopestack,8,I32);
418 PL_scopestack_ix = 0; 943 PL_scopestack_ix = 0;
419 PL_scopestack_max = 32; 944 PL_scopestack_max = 8;
945#if HAS_SCOPESTACK_NAME
946 New(54,PL_scopestack_name,8,const char*);
947#endif
420 948
421 New(54,PL_savestack,64,ANY); 949 New(54,PL_savestack,24,ANY);
422 PL_savestack_ix = 0; 950 PL_savestack_ix = 0;
423 PL_savestack_max = 64; 951 PL_savestack_max = 24;
424 952
425#if !PERL_VERSION_ATLEAST (5,9,0) 953#if !PERL_VERSION_ATLEAST (5,10,0)
426 New(54,PL_retstack,16,OP*); 954 New(54,PL_retstack,4,OP*);
427 PL_retstack_ix = 0; 955 PL_retstack_ix = 0;
428 PL_retstack_max = 16; 956 PL_retstack_max = 4;
429#endif 957#endif
430} 958}
959#endif
431 960
432/* 961/*
433 * destroy the stacks, the callchain etc... 962 * destroy the stacks, the callchain etc...
434 */ 963 */
435static void 964static void
436coro_destroy_stacks () 965coro_destruct_stacks (pTHX)
437{ 966{
438 if (!IN_DESTRUCT)
439 {
440 /* is this ugly, I ask? */
441 LEAVE_SCOPE (0);
442
443 /* sure it is, but more important: is it correct?? :/ */
444 FREETMPS;
445
446 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
447 }
448
449 while (PL_curstackinfo->si_next) 967 while (PL_curstackinfo->si_next)
450 PL_curstackinfo = PL_curstackinfo->si_next; 968 PL_curstackinfo = PL_curstackinfo->si_next;
451 969
452 while (PL_curstackinfo) 970 while (PL_curstackinfo)
453 { 971 {
454 PERL_SI *p = PL_curstackinfo->si_prev; 972 PERL_SI *p = PL_curstackinfo->si_prev;
455 973
456 { /*D*//*remove*/
457 dSP;
458 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459 PUTBACK; /* possibly superfluous */
460 }
461
462 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
463 {
464 dounwind (-1);/*D*//*remove*/
465 SvREFCNT_dec (PL_curstackinfo->si_stack); 975 SvREFCNT_dec (PL_curstackinfo->si_stack);
466 }
467 976
468 Safefree (PL_curstackinfo->si_cxstack); 977 Safefree (PL_curstackinfo->si_cxstack);
469 Safefree (PL_curstackinfo); 978 Safefree (PL_curstackinfo);
470 PL_curstackinfo = p; 979 PL_curstackinfo = p;
471 } 980 }
472 981
473 Safefree (PL_tmps_stack); 982 Safefree (PL_tmps_stack);
474 Safefree (PL_markstack); 983 Safefree (PL_markstack);
475 Safefree (PL_scopestack); 984 Safefree (PL_scopestack);
985#if HAS_SCOPESTACK_NAME
986 Safefree (PL_scopestack_name);
987#endif
476 Safefree (PL_savestack); 988 Safefree (PL_savestack);
477#if !PERL_VERSION_ATLEAST (5,9,0) 989#if !PERL_VERSION_ATLEAST (5,10,0)
478 Safefree (PL_retstack); 990 Safefree (PL_retstack);
479#endif 991#endif
480} 992}
481 993
994#define CORO_RSS \
995 rss += sizeof (SYM (curstackinfo)); \
996 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
997 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
998 rss += SYM (tmps_max) * sizeof (SV *); \
999 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
1000 rss += SYM (scopestack_max) * sizeof (I32); \
1001 rss += SYM (savestack_max) * sizeof (ANY);
1002
1003static size_t
1004coro_rss (pTHX_ struct coro *coro)
1005{
1006 size_t rss = sizeof (*coro);
1007
1008 if (coro->mainstack)
1009 {
1010 if (coro->flags & CF_RUNNING)
1011 {
1012 #define SYM(sym) PL_ ## sym
1013 CORO_RSS;
1014 #undef SYM
1015 }
1016 else
1017 {
1018 #define SYM(sym) coro->slot->sym
1019 CORO_RSS;
1020 #undef SYM
1021 }
1022 }
1023
1024 return rss;
1025}
1026
1027/** coroutine stack handling ************************************************/
1028
1029static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
1030static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
1031static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
1032
1033/* apparently < 5.8.8 */
1034#ifndef MgPV_nolen_const
1035#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
1036 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
1037 (const char*)(mg)->mg_ptr)
1038#endif
1039
1040/*
1041 * This overrides the default magic get method of %SIG elements.
1042 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
1043 * and instead of trying to save and restore the hash elements (extremely slow),
1044 * we just provide our own readback here.
1045 */
1046static int ecb_cold
1047coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
1048{
1049 const char *s = MgPV_nolen_const (mg);
1050
1051 if (*s == '_')
1052 {
1053 SV **svp = 0;
1054
1055 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1056 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1057
1058 if (svp)
1059 {
1060 SV *ssv;
1061
1062 if (!*svp)
1063 ssv = &PL_sv_undef;
1064 else if (SvTYPE (*svp) == SVt_PVCV) /* perlio directly stores a CV in warnhook. ugh. */
1065 ssv = sv_2mortal (newRV_inc (*svp));
1066 else
1067 ssv = *svp;
1068
1069 sv_setsv (sv, ssv);
1070 return 0;
1071 }
1072 }
1073
1074 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
1075}
1076
1077static int ecb_cold
1078coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
1079{
1080 const char *s = MgPV_nolen_const (mg);
1081
1082 if (*s == '_')
1083 {
1084 SV **svp = 0;
1085
1086 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1087 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1088
1089 if (svp)
1090 {
1091 SV *old = *svp;
1092 *svp = 0;
1093 SvREFCNT_dec (old);
1094 return 0;
1095 }
1096 }
1097
1098 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1099}
1100
1101static int ecb_cold
1102coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1103{
1104 const char *s = MgPV_nolen_const (mg);
1105
1106 if (*s == '_')
1107 {
1108 SV **svp = 0;
1109
1110 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1111 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1112
1113 if (svp)
1114 {
1115 SV *old = *svp;
1116 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1117 SvREFCNT_dec (old);
1118 return 0;
1119 }
1120 }
1121
1122 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1123}
1124
1125static void
1126prepare_nop (pTHX_ struct coro_transfer_args *ta)
1127{
1128 /* kind of mega-hacky, but works */
1129 ta->next = ta->prev = (struct coro *)ta;
1130}
1131
482static void 1132static int
483setup_coro (struct coro *coro) 1133slf_check_nop (pTHX_ struct CoroSLF *frame)
1134{
1135 return 0;
1136}
1137
1138static int
1139slf_check_repeat (pTHX_ struct CoroSLF *frame)
1140{
1141 return 1;
1142}
1143
1144static UNOP init_perl_op;
1145
1146ecb_noinline static void /* noinline to keep it out of the transfer fast path */
1147init_perl (pTHX_ struct coro *coro)
484{ 1148{
485 /* 1149 /*
486 * emulate part of the perl startup here. 1150 * emulate part of the perl startup here.
487 */ 1151 */
488
489 coro_init_stacks (); 1152 coro_init_stacks (aTHX);
490 1153
1154 PL_runops = RUNOPS_DEFAULT;
491 PL_curcop = &PL_compiling; 1155 PL_curcop = &PL_compiling;
492 PL_in_eval = EVAL_NULL; 1156 PL_in_eval = EVAL_NULL;
1157 PL_comppad = 0;
1158 PL_comppad_name = 0;
1159 PL_comppad_name_fill = 0;
1160 PL_comppad_name_floor = 0;
493 PL_curpm = 0; 1161 PL_curpm = 0;
1162 PL_curpad = 0;
494 PL_localizing = 0; 1163 PL_localizing = 0;
495 PL_dirty = 0;
496 PL_restartop = 0; 1164 PL_restartop = 0;
1165#if PERL_VERSION_ATLEAST (5,10,0)
1166 PL_parser = 0;
1167#endif
1168 PL_hints = 0;
1169
1170 /* recreate the die/warn hooks */
1171 PL_diehook = SvREFCNT_inc (rv_diehook);
1172 PL_warnhook = SvREFCNT_inc (rv_warnhook);
1173
1174 GvSV (PL_defgv) = newSV (0);
1175 GvAV (PL_defgv) = coro->args; coro->args = 0;
1176 GvSV (PL_errgv) = newSV (0);
1177 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1178 GvHV (PL_hintgv) = newHV ();
1179#if PERL_VERSION_ATLEAST (5,10,0)
1180 hv_magic (GvHV (PL_hintgv), 0, PERL_MAGIC_hints);
1181#endif
1182 PL_rs = newSVsv (GvSV (irsgv));
1183 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
497 1184
498 { 1185 {
499 dSP; 1186 dSP;
500 LOGOP myop; 1187 UNOP myop;
501 1188
502 /* I have no idea why this is needed, but it is */ 1189 Zero (&myop, 1, UNOP);
1190 myop.op_next = Nullop;
1191 myop.op_type = OP_ENTERSUB;
1192 myop.op_flags = OPf_WANT_VOID;
1193
503 PUSHMARK (SP); 1194 PUSHMARK (SP);
504 1195 PUSHs ((SV *)coro->startcv);
505 SvREFCNT_dec (GvAV (PL_defgv)); 1196 PUTBACK;
506 GvAV (PL_defgv) = coro->args; coro->args = 0;
507
508 Zero (&myop, 1, LOGOP);
509 myop.op_next = Nullop;
510 myop.op_flags = OPf_WANT_VOID;
511
512 PL_op = (OP *)&myop; 1197 PL_op = (OP *)&myop;
513
514 PUSHMARK (SP);
515 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516 PUTBACK;
517 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1198 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518 SPAGAIN;
519 } 1199 }
520 1200
521 ENTER; /* necessary e.g. for dounwind */ 1201 /* this newly created coroutine might be run on an existing cctx which most
522} 1202 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1203 */
1204 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1205 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1206 slf_frame.destroy = 0;
523 1207
1208 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1209 init_perl_op.op_next = PL_op;
1210 init_perl_op.op_type = OP_ENTERSUB;
1211 init_perl_op.op_ppaddr = pp_slf;
1212 /* no flags etc. required, as an init function won't be called */
1213
1214 PL_op = (OP *)&init_perl_op;
1215
1216 /* copy throw, in case it was set before init_perl */
1217 CORO_THROW = coro->except;
1218
1219 SWAP_SVS (coro);
1220
1221 if (ecb_expect_false (enable_times))
1222 {
1223 coro_times_update ();
1224 coro_times_sub (coro);
1225 }
1226}
1227
524static void 1228static void
1229coro_unwind_stacks (pTHX)
1230{
1231 if (!IN_DESTRUCT)
1232 {
1233 /* restore all saved variables and stuff */
1234 LEAVE_SCOPE (0);
1235 assert (PL_tmps_floor == -1);
1236
1237 /* free all temporaries */
1238 FREETMPS;
1239 assert (PL_tmps_ix == -1);
1240
1241 /* unwind all extra stacks */
1242 POPSTACK_TO (PL_mainstack);
1243
1244 /* unwind main stack */
1245 dounwind (-1);
1246 }
1247}
1248
1249static void
1250destroy_perl (pTHX_ struct coro *coro)
1251{
1252 SV *svf [9];
1253
1254 {
1255 SV *old_current = SvRV (coro_current);
1256 struct coro *current = SvSTATE (old_current);
1257
1258 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1259
1260 save_perl (aTHX_ current);
1261
1262 /* this will cause transfer_check to croak on block*/
1263 SvRV_set (coro_current, (SV *)coro->hv);
1264
1265 load_perl (aTHX_ coro);
1266
1267 coro_unwind_stacks (aTHX);
1268
1269 /* restore swapped sv's */
1270 SWAP_SVS (coro);
1271
1272 coro_destruct_stacks (aTHX);
1273
1274 /* now save some sv's to be free'd later */
1275 svf [0] = GvSV (PL_defgv);
1276 svf [1] = (SV *)GvAV (PL_defgv);
1277 svf [2] = GvSV (PL_errgv);
1278 svf [3] = (SV *)PL_defoutgv;
1279 svf [4] = PL_rs;
1280 svf [5] = GvSV (irsgv);
1281 svf [6] = (SV *)GvHV (PL_hintgv);
1282 svf [7] = PL_diehook;
1283 svf [8] = PL_warnhook;
1284 assert (9 == sizeof (svf) / sizeof (*svf));
1285
1286 SvRV_set (coro_current, old_current);
1287
1288 load_perl (aTHX_ current);
1289 }
1290
1291 {
1292 unsigned int i;
1293
1294 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1295 SvREFCNT_dec (svf [i]);
1296
1297 SvREFCNT_dec (coro->saved_deffh);
1298 SvREFCNT_dec (coro->rouse_cb);
1299 SvREFCNT_dec (coro->invoke_cb);
1300 SvREFCNT_dec (coro->invoke_av);
1301 SvREFCNT_dec (coro->on_enter_xs);
1302 SvREFCNT_dec (coro->on_leave_xs);
1303 }
1304}
1305
1306ecb_inline void
525free_coro_mortal () 1307free_coro_mortal (pTHX)
526{ 1308{
527 if (coro_mortal) 1309 if (ecb_expect_true (coro_mortal))
528 { 1310 {
529 SvREFCNT_dec (coro_mortal); 1311 SvREFCNT_dec ((SV *)coro_mortal);
530 coro_mortal = 0; 1312 coro_mortal = 0;
531 } 1313 }
532} 1314}
533 1315
534static void NOINLINE
535prepare_cctx (coro_cctx *cctx)
536{
537 dSP;
538 LOGOP myop;
539
540 Zero (&myop, 1, LOGOP);
541 myop.op_next = PL_op;
542 myop.op_flags = OPf_WANT_VOID;
543
544 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545
546 PUSHMARK (SP);
547 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548 PUTBACK;
549 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
550 SPAGAIN;
551}
552
553static void 1316static int
554coro_run (void *arg) 1317runops_trace (pTHX)
555{ 1318{
556 /* coro_run is the alternative epilogue of transfer() */ 1319 COP *oldcop = 0;
557 UNLOCK; 1320 int oldcxix = -2;
558 1321
559 /* 1322 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
560 * this is a _very_ stripped down perl interpreter ;) 1323 {
561 */ 1324 PERL_ASYNC_CHECK ();
1325
1326 if (cctx_current->flags & CC_TRACE_ALL)
1327 {
1328 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1329 {
1330 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1331 SV **bot, **top;
1332 AV *av = newAV (); /* return values */
1333 SV **cb;
1334 dSP;
1335
1336 GV *gv = CvGV (cx->blk_sub.cv);
1337 SV *fullname = sv_2mortal (newSV (0));
1338 if (isGV (gv))
1339 gv_efullname3 (fullname, gv, 0);
1340
1341 bot = PL_stack_base + cx->blk_oldsp + 1;
1342 top = cx->blk_gimme == G_ARRAY ? SP + 1
1343 : cx->blk_gimme == G_SCALAR ? bot + 1
1344 : bot;
1345
1346 av_extend (av, top - bot);
1347 while (bot < top)
1348 av_push (av, SvREFCNT_inc_NN (*bot++));
1349
1350 PL_runops = RUNOPS_DEFAULT;
1351 ENTER;
1352 SAVETMPS;
1353 EXTEND (SP, 3);
1354 PUSHMARK (SP);
1355 PUSHs (&PL_sv_no);
1356 PUSHs (fullname);
1357 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1358 PUTBACK;
1359 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1360 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1361 SPAGAIN;
1362 FREETMPS;
1363 LEAVE;
1364 PL_runops = runops_trace;
1365 }
1366
1367 if (oldcop != PL_curcop)
1368 {
1369 oldcop = PL_curcop;
1370
1371 if (PL_curcop != &PL_compiling)
1372 {
1373 SV **cb;
1374
1375 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB && cxstack_ix >= 0)
1376 {
1377 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1378
1379 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1380 {
1381 dSP;
1382 GV *gv = CvGV (cx->blk_sub.cv);
1383 SV *fullname = sv_2mortal (newSV (0));
1384
1385 if (isGV (gv))
1386 gv_efullname3 (fullname, gv, 0);
1387
1388 PL_runops = RUNOPS_DEFAULT;
1389 ENTER;
1390 SAVETMPS;
1391 EXTEND (SP, 3);
1392 PUSHMARK (SP);
1393 PUSHs (&PL_sv_yes);
1394 PUSHs (fullname);
1395 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1396 PUTBACK;
1397 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1398 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1399 SPAGAIN;
1400 FREETMPS;
1401 LEAVE;
1402 PL_runops = runops_trace;
1403 }
1404
1405 oldcxix = cxstack_ix;
1406 }
1407
1408 if (cctx_current->flags & CC_TRACE_LINE)
1409 {
1410 dSP;
1411
1412 PL_runops = RUNOPS_DEFAULT;
1413 ENTER;
1414 SAVETMPS;
1415 EXTEND (SP, 3);
1416 PL_runops = RUNOPS_DEFAULT;
1417 PUSHMARK (SP);
1418 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1419 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1420 PUTBACK;
1421 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1422 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1423 SPAGAIN;
1424 FREETMPS;
1425 LEAVE;
1426 PL_runops = runops_trace;
1427 }
1428 }
1429 }
1430 }
1431 }
1432
1433 TAINT_NOT;
1434 return 0;
1435}
1436
1437static struct CoroSLF cctx_ssl_frame;
1438
1439static void
1440slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1441{
1442 ta->prev = 0;
1443}
1444
1445static int
1446slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1447{
1448 *frame = cctx_ssl_frame;
1449
1450 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1451}
1452
1453/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1454static void ecb_noinline
1455cctx_prepare (pTHX)
1456{
562 PL_top_env = &PL_start_env; 1457 PL_top_env = &PL_start_env;
563 1458
1459 if (cctx_current->flags & CC_TRACE)
1460 PL_runops = runops_trace;
1461
1462 /* we already must be executing an SLF op, there is no other valid way
1463 * that can lead to creation of a new cctx */
1464 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1465 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1466
1467 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1468 cctx_ssl_frame = slf_frame;
1469
1470 slf_frame.prepare = slf_prepare_set_stacklevel;
1471 slf_frame.check = slf_check_set_stacklevel;
1472}
1473
1474/* the tail of transfer: execute stuff we can only do after a transfer */
1475ecb_inline void
1476transfer_tail (pTHX)
1477{
1478 free_coro_mortal (aTHX);
1479}
1480
1481/* try to exit the same way perl's main function would do */
1482/* we do not bother resetting the environment or other things *7
1483/* that are not, uhm, essential */
1484/* this obviously also doesn't work when perl is embedded */
1485static void ecb_noinline ecb_cold
1486perlish_exit (pTHX)
1487{
1488 int exitstatus = perl_destruct (PL_curinterp);
1489 perl_free (PL_curinterp);
1490 exit (exitstatus);
1491}
1492
1493/*
1494 * this is a _very_ stripped down perl interpreter ;)
1495 */
1496static void
1497cctx_run (void *arg)
1498{
1499#ifdef USE_ITHREADS
1500# if CORO_PTHREAD
1501 PERL_SET_CONTEXT (coro_thx);
1502# endif
1503#endif
1504 {
1505 dTHX;
1506
1507 /* normally we would need to skip the entersub here */
1508 /* not doing so will re-execute it, which is exactly what we want */
1509 /* PL_nop = PL_nop->op_next */
1510
564 /* inject call to cctx_init */ 1511 /* inject a fake subroutine call to cctx_init */
565 prepare_cctx ((coro_cctx *)arg); 1512 cctx_prepare (aTHX);
566 1513
1514 /* cctx_run is the alternative tail of transfer() */
1515 transfer_tail (aTHX);
1516
567 /* somebody will hit me for both perl_run and PL_restartop */ 1517 /* somebody or something will hit me for both perl_run and PL_restartop */
1518 PL_restartop = PL_op;
568 perl_run (PL_curinterp); 1519 perl_run (PL_curinterp);
1520 /*
1521 * Unfortunately, there is no way to get at the return values of the
1522 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1523 * runtime errors here, as this is just a random interpreter, not a thread.
1524 */
569 1525
570 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1526 /*
571 abort (); 1527 * If perl-run returns we assume exit() was being called or the coro
1528 * fell off the end, which seems to be the only valid (non-bug)
1529 * reason for perl_run to return. We try to mimic whatever perl is normally
1530 * doing in that case. YMMV.
1531 */
1532 perlish_exit (aTHX);
1533 }
572} 1534}
573 1535
574static coro_cctx * 1536static coro_cctx *
575cctx_new () 1537cctx_new (void)
576{ 1538{
577 coro_cctx *cctx; 1539 coro_cctx *cctx;
578 1540
579 ++cctx_count; 1541 ++cctx_count;
580
581 New (0, cctx, 1, coro_cctx); 1542 New (0, cctx, 1, coro_cctx);
582 1543
583#if HAVE_MMAP 1544 cctx->gen = cctx_gen;
1545 cctx->flags = 0;
1546 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
584 1547
585 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1548 return cctx;
586 /* mmap suppsedly does allocate-on-write for us */ 1549}
587 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 1550
589 if (cctx->sptr == (void *)-1) 1551/* create a new cctx only suitable as source */
1552static coro_cctx *
1553cctx_new_empty (void)
1554{
1555 coro_cctx *cctx = cctx_new ();
1556
1557 cctx->stack.sptr = 0;
1558 coro_create (&cctx->cctx, 0, 0, 0, 0);
1559
1560 return cctx;
1561}
1562
1563/* create a new cctx suitable as destination/running a perl interpreter */
1564static coro_cctx *
1565cctx_new_run (void)
1566{
1567 coro_cctx *cctx = cctx_new ();
1568
1569 if (!coro_stack_alloc (&cctx->stack, cctx_stacksize))
590 { 1570 {
591 perror ("FATAL: unable to mmap stack for coroutine"); 1571 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
592 _exit (EXIT_FAILURE); 1572 _exit (EXIT_FAILURE);
593 } 1573 }
594 1574
595# if STACKGUARD
596 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
597# endif
598
599#else
600
601 cctx->ssize = STACKSIZE * (long)sizeof (long);
602 New (0, cctx->sptr, STACKSIZE, long);
603
604 if (!cctx->sptr)
605 {
606 perror ("FATAL: unable to malloc stack for coroutine");
607 _exit (EXIT_FAILURE);
608 }
609
610#endif
611
612#if USE_VALGRIND
613 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615 cctx->ssize + (char *)cctx->sptr
616 );
617#endif
618
619 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize); 1575 coro_create (&cctx->cctx, cctx_run, (void *)cctx, cctx->stack.sptr, cctx->stack.ssze);
620 1576
621 return cctx; 1577 return cctx;
622} 1578}
623 1579
624static void 1580static void
625cctx_destroy (coro_cctx *cctx) 1581cctx_destroy (coro_cctx *cctx)
626{ 1582{
627 if (!cctx) 1583 if (!cctx)
628 return; 1584 return;
629 1585
1586 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1587
630 --cctx_count; 1588 --cctx_count;
1589 coro_destroy (&cctx->cctx);
631 1590
632#if USE_VALGRIND 1591 coro_stack_free (&cctx->stack);
633 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634#endif
635
636#if HAVE_MMAP
637 munmap (cctx->sptr, cctx->ssize);
638#else
639 Safefree (cctx->sptr);
640#endif
641 1592
642 Safefree (cctx); 1593 Safefree (cctx);
643} 1594}
644 1595
1596/* wether this cctx should be destructed */
1597#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1598
645static coro_cctx * 1599static coro_cctx *
646cctx_get () 1600cctx_get (pTHX)
647{ 1601{
648 coro_cctx *cctx; 1602 while (ecb_expect_true (cctx_first))
649
650 if (cctx_first)
651 { 1603 {
652 cctx = cctx_first; 1604 coro_cctx *cctx = cctx_first;
653 cctx_first = cctx->next; 1605 cctx_first = cctx->next;
654 --cctx_idle; 1606 --cctx_idle;
655 } 1607
656 else 1608 if (ecb_expect_true (!CCTX_EXPIRED (cctx)))
657 { 1609 return cctx;
658 cctx = cctx_new (); 1610
659 PL_op = PL_op->op_next; 1611 cctx_destroy (cctx);
660 } 1612 }
661 1613
662 return cctx; 1614 return cctx_new_run ();
663} 1615}
664 1616
665static void 1617static void
666cctx_put (coro_cctx *cctx) 1618cctx_put (coro_cctx *cctx)
667{ 1619{
1620 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->stack.sptr));
1621
668 /* free another cctx if overlimit */ 1622 /* free another cctx if overlimit */
669 if (cctx_idle >= MAX_IDLE_CCTX) 1623 if (ecb_expect_false (cctx_idle >= cctx_max_idle))
670 { 1624 {
671 coro_cctx *first = cctx_first; 1625 coro_cctx *first = cctx_first;
672 cctx_first = first->next; 1626 cctx_first = first->next;
673 --cctx_idle; 1627 --cctx_idle;
674 1628
675 assert (!first->inuse);
676 cctx_destroy (first); 1629 cctx_destroy (first);
677 } 1630 }
678 1631
679 ++cctx_idle; 1632 ++cctx_idle;
680 cctx->next = cctx_first; 1633 cctx->next = cctx_first;
681 cctx_first = cctx; 1634 cctx_first = cctx;
682} 1635}
683 1636
684/* never call directly, always through the coro_state_transfer global variable */ 1637/** coroutine switching *****************************************************/
685static void NOINLINE 1638
1639static void
1640transfer_check (pTHX_ struct coro *prev, struct coro *next)
1641{
1642 /* TODO: throwing up here is considered harmful */
1643
1644 if (ecb_expect_true (prev != next))
1645 {
1646 if (ecb_expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1647 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1648
1649 if (ecb_expect_false (next->flags & (CF_RUNNING | CF_ZOMBIE | CF_SUSPENDED)))
1650 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1651
1652#if !PERL_VERSION_ATLEAST (5,10,0)
1653 if (ecb_expect_false (PL_lex_state != LEX_NOTPARSING))
1654 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1655#endif
1656 }
1657}
1658
1659/* always use the TRANSFER macro */
1660static void ecb_noinline /* noinline so we have a fixed stackframe */
686transfer (struct coro *prev, struct coro *next, int flags) 1661transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
687{ 1662{
688 dSTACKLEVEL; 1663 dSTACKLEVEL;
689 1664
690 /* sometimes transfer is only called to set idle_sp */ 1665 /* sometimes transfer is only called to set idle_sp */
691 if (flags == TRANSFER_SET_STACKLEVEL) 1666 if (ecb_expect_false (!prev))
1667 {
692 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1668 cctx_current->idle_sp = STACKLEVEL;
693 else if (prev != next) 1669 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
694 { 1670 }
1671 else if (ecb_expect_true (prev != next))
1672 {
695 coro_cctx *prev__cctx; 1673 coro_cctx *cctx_prev;
696 1674
697 if (prev->flags & CF_NEW) 1675 if (ecb_expect_false (prev->flags & CF_NEW))
698 { 1676 {
699 /* create a new empty context */ 1677 /* create a new empty/source context */
700 Newz (0, prev->cctx, 1, coro_cctx);
701 prev->cctx->inuse = 1;
702 prev->flags &= ~CF_NEW; 1678 prev->flags &= ~CF_NEW;
703 prev->flags |= CF_RUNNING; 1679 prev->flags |= CF_RUNNING;
704 } 1680 }
705 1681
706 /*TODO: must not croak here */
707 if (!prev->flags & CF_RUNNING)
708 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710 if (next->flags & CF_RUNNING)
711 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712
713 prev->flags &= ~CF_RUNNING; 1682 prev->flags &= ~CF_RUNNING;
714 next->flags |= CF_RUNNING; 1683 next->flags |= CF_RUNNING;
715 1684
716 LOCK; 1685 /* first get rid of the old state */
1686 save_perl (aTHX_ prev);
717 1687
718 if (next->flags & CF_NEW) 1688 if (ecb_expect_false (next->flags & CF_NEW))
719 { 1689 {
720 /* need to start coroutine */ 1690 /* need to start coroutine */
721 next->flags &= ~CF_NEW; 1691 next->flags &= ~CF_NEW;
722 /* first get rid of the old state */
723 SAVE (prev, -1);
724 /* setup coroutine call */ 1692 /* setup coroutine call */
725 setup_coro (next); 1693 init_perl (aTHX_ next);
726 /* need a new stack */
727 assert (!next->stack);
728 } 1694 }
729 else 1695 else
1696 load_perl (aTHX_ next);
1697
1698 /* possibly untie and reuse the cctx */
1699 if (ecb_expect_true (
1700 cctx_current->idle_sp == STACKLEVEL
1701 && !(cctx_current->flags & CC_TRACE)
1702 && !force_cctx
1703 ))
730 { 1704 {
731 /* coroutine already started */ 1705 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
732 SAVE (prev, flags); 1706 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
733 LOAD (next); 1707
1708 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1709 /* without this the next cctx_get might destroy the running cctx while still in use */
1710 if (ecb_expect_false (CCTX_EXPIRED (cctx_current)))
1711 if (ecb_expect_true (!next->cctx))
1712 next->cctx = cctx_get (aTHX);
1713
1714 cctx_put (cctx_current);
734 } 1715 }
1716 else
1717 prev->cctx = cctx_current;
735 1718
736 prev__cctx = prev->cctx; 1719 ++next->usecount;
737 1720
738 /* possibly "free" the cctx */ 1721 cctx_prev = cctx_current;
739 if (prev__cctx->idle_sp == STACKLEVEL) 1722 cctx_current = ecb_expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1723
1724 next->cctx = 0;
1725
1726 if (ecb_expect_false (cctx_prev != cctx_current))
740 { 1727 {
741 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1728 cctx_prev->top_env = PL_top_env;
742 assert (PL_top_env == prev__cctx->top_env); 1729 PL_top_env = cctx_current->top_env;
743 1730 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
744 prev->cctx = 0;
745
746 cctx_put (prev__cctx);
747 prev__cctx->inuse = 0;
748 } 1731 }
749 1732
750 if (!next->cctx) 1733 transfer_tail (aTHX);
751 {
752 next->cctx = cctx_get ();
753 assert (!next->cctx->inuse);
754 next->cctx->inuse = 1;
755 }
756
757 if (prev__cctx != next->cctx)
758 {
759 prev__cctx->top_env = PL_top_env;
760 PL_top_env = next->cctx->top_env;
761 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762 }
763
764 free_coro_mortal ();
765
766 UNLOCK;
767 } 1734 }
768} 1735}
769 1736
770struct transfer_args 1737#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
771{
772 struct coro *prev, *next;
773 int flags;
774};
775
776#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1738#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777 1739
1740/** high level stuff ********************************************************/
1741
1742/* this function is actually Coro, not Coro::State, but we call it from here */
1743/* because it is convenient - but it hasn't been declared yet for that reason */
778static void 1744static void
1745coro_call_on_destroy (pTHX_ struct coro *coro);
1746
1747static void
779coro_state_destroy (struct coro *coro) 1748coro_state_destroy (pTHX_ struct coro *coro)
780{ 1749{
781 if (coro->refcnt--) 1750 if (coro->flags & CF_ZOMBIE)
782 return; 1751 return;
783 1752
784 if (coro->mainstack && coro->mainstack != main_mainstack) 1753 slf_destroy (aTHX_ coro);
785 {
786 struct coro temp;
787 1754
1755 coro->flags |= CF_ZOMBIE;
1756
788 if (coro->flags & CF_RUNNING) 1757 if (coro->flags & CF_READY)
789 croak ("FATAL: tried to destroy currently running coroutine");
790
791 SAVE ((&temp), TRANSFER_SAVE_ALL);
792 LOAD (coro);
793
794 coro_destroy_stacks ();
795
796 LOAD ((&temp)); /* this will get rid of defsv etc.. */
797
798 coro->mainstack = 0;
799 } 1758 {
1759 /* reduce nready, as destroying a ready coro effectively unreadies it */
1760 /* alternative: look through all ready queues and remove the coro */
1761 --coro_nready;
1762 }
1763 else
1764 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1765
1766 if (coro->next) coro->next->prev = coro->prev;
1767 if (coro->prev) coro->prev->next = coro->next;
1768 if (coro == coro_first) coro_first = coro->next;
1769
1770 if (coro->mainstack
1771 && coro->mainstack != main_mainstack
1772 && coro->slot
1773 && !PL_dirty)
1774 destroy_perl (aTHX_ coro);
800 1775
801 cctx_destroy (coro->cctx); 1776 cctx_destroy (coro->cctx);
1777 SvREFCNT_dec (coro->startcv);
802 SvREFCNT_dec (coro->args); 1778 SvREFCNT_dec (coro->args);
803 Safefree (coro); 1779 SvREFCNT_dec (coro->swap_sv);
1780 SvREFCNT_dec (CORO_THROW);
1781
1782 coro_call_on_destroy (aTHX_ coro);
1783
1784 /* more destruction mayhem in coro_state_free */
804} 1785}
805 1786
806static int 1787static int
807coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1788coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808{ 1789{
809 struct coro *coro = (struct coro *)mg->mg_ptr; 1790 struct coro *coro = (struct coro *)mg->mg_ptr;
810 mg->mg_ptr = 0; 1791 mg->mg_ptr = 0;
811 1792
812 coro_state_destroy (coro); 1793 coro_state_destroy (aTHX_ coro);
1794 SvREFCNT_dec (coro->on_destroy);
1795 SvREFCNT_dec (coro->status);
1796
1797 Safefree (coro);
813 1798
814 return 0; 1799 return 0;
815} 1800}
816 1801
817static int 1802static int ecb_cold
818coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params) 1803coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
819{ 1804{
820 struct coro *coro = (struct coro *)mg->mg_ptr; 1805 /* called when perl clones the current process the slow way (windows process emulation) */
821 1806 /* WE SIMply nuke the pointers in the copy, causing perl to croak */
822 ++coro->refcnt; 1807 mg->mg_ptr = 0;
1808 mg->mg_virtual = 0;
823 1809
824 return 0; 1810 return 0;
825} 1811}
826 1812
827static MGVTBL coro_state_vtbl = { 1813static MGVTBL coro_state_vtbl = {
828 0, 0, 0, 0, 1814 0, 0, 0, 0,
829 coro_state_clear, 1815 coro_state_free,
830 0, 1816 0,
831#ifdef MGf_DUP 1817#ifdef MGf_DUP
832 coro_state_dup, 1818 coro_state_dup,
833#else 1819#else
834# define MGf_DUP 0 1820# define MGf_DUP 0
835#endif 1821#endif
836}; 1822};
837 1823
838static struct coro *
839SvSTATE (SV *coro)
840{
841 HV *stash;
842 MAGIC *mg;
843
844 if (SvROK (coro))
845 coro = SvRV (coro);
846
847 stash = SvSTASH (coro);
848 if (stash != coro_stash && stash != coro_state_stash)
849 {
850 /* very slow, but rare, check */
851 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852 croak ("Coro::State object required");
853 }
854
855 mg = SvMAGIC (coro);
856 assert (mg->mg_type == PERL_MAGIC_ext);
857 return (struct coro *)mg->mg_ptr;
858}
859
860static void 1824static void
861prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1825prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
862{ 1826{
863 ta->prev = SvSTATE (prev); 1827 ta->prev = SvSTATE (prev_sv);
864 ta->next = SvSTATE (next); 1828 ta->next = SvSTATE (next_sv);
865 ta->flags = flags; 1829 TRANSFER_CHECK (*ta);
866} 1830}
867 1831
868static void 1832static void
869api_transfer (SV *prev, SV *next, int flags) 1833api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
870{ 1834{
871 struct transfer_args ta; 1835 struct coro_transfer_args ta;
872 1836
873 prepare_transfer (&ta, prev, next, flags); 1837 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874 TRANSFER (ta); 1838 TRANSFER (ta, 1);
875} 1839}
876 1840
877/** Coro ********************************************************************/ 1841/** Coro ********************************************************************/
878 1842
879#define PRIO_MAX 3 1843ecb_inline void
880#define PRIO_HIGH 1 1844coro_enq (pTHX_ struct coro *coro)
881#define PRIO_NORMAL 0
882#define PRIO_LOW -1
883#define PRIO_IDLE -3
884#define PRIO_MIN -4
885
886/* for Coro.pm */
887static SV *coro_current;
888static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889static int coro_nready;
890
891static void
892coro_enq (SV *coro_sv)
893{ 1845{
894 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1846 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
895 coro_nready++;
896}
897 1847
898static SV * 1848 SvREFCNT_inc_NN (coro->hv);
899coro_deq (int min_prio)
900{
901 int prio = PRIO_MAX - PRIO_MIN;
902 1849
903 min_prio -= PRIO_MIN; 1850 coro->next_ready = 0;
904 if (min_prio < 0) 1851 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
905 min_prio = 0; 1852 ready [1] = coro;
1853}
906 1854
1855ecb_inline struct coro *
1856coro_deq (pTHX)
1857{
1858 int prio;
1859
907 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1860 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
908 if (AvFILLp (coro_ready [prio]) >= 0) 1861 {
1862 struct coro **ready = coro_ready [prio];
1863
1864 if (ready [0])
909 { 1865 {
910 coro_nready--; 1866 struct coro *coro = ready [0];
911 return av_shift (coro_ready [prio]); 1867 ready [0] = coro->next_ready;
1868 return coro;
912 } 1869 }
1870 }
913 1871
914 return 0; 1872 return 0;
915} 1873}
916 1874
1875static void
1876invoke_sv_ready_hook_helper (void)
1877{
1878 dTHX;
1879 dSP;
1880
1881 ENTER;
1882 SAVETMPS;
1883
1884 PUSHMARK (SP);
1885 PUTBACK;
1886 call_sv (coro_readyhook, G_VOID | G_DISCARD);
1887
1888 FREETMPS;
1889 LEAVE;
1890}
1891
917static int 1892static int
918api_ready (SV *coro_sv) 1893api_ready (pTHX_ SV *coro_sv)
919{ 1894{
920 struct coro *coro;
921
922 if (SvROK (coro_sv))
923 coro_sv = SvRV (coro_sv);
924
925 coro = SvSTATE (coro_sv); 1895 struct coro *coro = SvSTATE (coro_sv);
926 1896
927 if (coro->flags & CF_READY) 1897 if (coro->flags & CF_READY)
928 return 0; 1898 return 0;
929 1899
930#if 0 /* this is actually harmless */ 1900 coro->flags |= CF_READY;
1901
1902 coro_enq (aTHX_ coro);
1903
1904 if (!coro_nready++)
1905 if (coroapi.readyhook)
1906 coroapi.readyhook ();
1907
1908 return 1;
1909}
1910
1911static int
1912api_is_ready (pTHX_ SV *coro_sv)
1913{
1914 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1915}
1916
1917/* expects to own a reference to next->hv */
1918ecb_inline void
1919prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1920{
1921 SV *prev_sv = SvRV (coro_current);
1922
1923 ta->prev = SvSTATE_hv (prev_sv);
1924 ta->next = next;
1925
1926 TRANSFER_CHECK (*ta);
1927
1928 SvRV_set (coro_current, (SV *)next->hv);
1929
1930 free_coro_mortal (aTHX);
1931 coro_mortal = prev_sv;
1932}
1933
1934static void
1935prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1936{
1937 for (;;)
1938 {
1939 struct coro *next = coro_deq (aTHX);
1940
1941 if (ecb_expect_true (next))
1942 {
1943 /* cannot transfer to destroyed coros, skip and look for next */
1944 if (ecb_expect_false (next->flags & (CF_ZOMBIE | CF_SUSPENDED)))
1945 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1946 else
1947 {
1948 next->flags &= ~CF_READY;
1949 --coro_nready;
1950
1951 prepare_schedule_to (aTHX_ ta, next);
1952 break;
1953 }
1954 }
1955 else
1956 {
1957 /* nothing to schedule: call the idle handler */
1958 if (SvROK (sv_idle)
1959 && SvOBJECT (SvRV (sv_idle)))
1960 {
1961 if (SvRV (sv_idle) == SvRV (coro_current))
1962 {
1963 require_pv ("Carp");
1964
1965 {
1966 dSP;
1967
1968 ENTER;
1969 SAVETMPS;
1970
1971 PUSHMARK (SP);
1972 XPUSHs (sv_2mortal (newSVpv ("FATAL: $Coro::idle blocked itself - did you try to block inside an event loop callback? Caught", 0)));
1973 PUTBACK;
1974 call_pv ("Carp::confess", G_VOID | G_DISCARD);
1975
1976 FREETMPS;
1977 LEAVE;
1978 }
1979 }
1980
1981 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1982 api_ready (aTHX_ SvRV (sv_idle));
1983 --coro_nready;
1984 }
1985 else
1986 {
1987 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1988 dSP;
1989
1990 ENTER;
1991 SAVETMPS;
1992
1993 PUSHMARK (SP);
1994 PUTBACK;
1995 call_sv (sv_idle, G_VOID | G_DISCARD);
1996
1997 FREETMPS;
1998 LEAVE;
1999 }
2000 }
2001 }
2002}
2003
2004ecb_inline void
2005prepare_cede (pTHX_ struct coro_transfer_args *ta)
2006{
2007 api_ready (aTHX_ coro_current);
2008 prepare_schedule (aTHX_ ta);
2009}
2010
2011ecb_inline void
2012prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
2013{
2014 SV *prev = SvRV (coro_current);
2015
2016 if (coro_nready)
2017 {
2018 prepare_schedule (aTHX_ ta);
2019 api_ready (aTHX_ prev);
2020 }
2021 else
2022 prepare_nop (aTHX_ ta);
2023}
2024
2025static void
2026api_schedule (pTHX)
2027{
2028 struct coro_transfer_args ta;
2029
2030 prepare_schedule (aTHX_ &ta);
2031 TRANSFER (ta, 1);
2032}
2033
2034static void
2035api_schedule_to (pTHX_ SV *coro_sv)
2036{
2037 struct coro_transfer_args ta;
2038 struct coro *next = SvSTATE (coro_sv);
2039
2040 SvREFCNT_inc_NN (coro_sv);
2041 prepare_schedule_to (aTHX_ &ta, next);
2042}
2043
2044static int
2045api_cede (pTHX)
2046{
2047 struct coro_transfer_args ta;
2048
2049 prepare_cede (aTHX_ &ta);
2050
2051 if (ecb_expect_true (ta.prev != ta.next))
2052 {
2053 TRANSFER (ta, 1);
2054 return 1;
2055 }
2056 else
2057 return 0;
2058}
2059
2060static int
2061api_cede_notself (pTHX)
2062{
2063 if (coro_nready)
2064 {
2065 struct coro_transfer_args ta;
2066
2067 prepare_cede_notself (aTHX_ &ta);
2068 TRANSFER (ta, 1);
2069 return 1;
2070 }
2071 else
2072 return 0;
2073}
2074
2075static void
2076api_trace (pTHX_ SV *coro_sv, int flags)
2077{
2078 struct coro *coro = SvSTATE (coro_sv);
2079
931 if (coro->flags & CF_RUNNING) 2080 if (coro->flags & CF_RUNNING)
932 croak ("Coro::ready called on currently running coroutine"); 2081 croak ("cannot enable tracing on a running coroutine, caught");
933#endif
934 2082
935 coro->flags |= CF_READY; 2083 if (flags & CC_TRACE)
2084 {
2085 if (!coro->cctx)
2086 coro->cctx = cctx_new_run ();
2087 else if (!(coro->cctx->flags & CC_TRACE))
2088 croak ("cannot enable tracing on coroutine with custom stack, caught");
936 2089
937 LOCK; 2090 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
938 coro_enq (SvREFCNT_inc (coro_sv)); 2091 }
939 UNLOCK; 2092 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2093 {
2094 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2095
2096 if (coro->flags & CF_RUNNING)
2097 PL_runops = RUNOPS_DEFAULT;
2098 else
2099 coro->slot->runops = RUNOPS_DEFAULT;
2100 }
2101}
2102
2103static void
2104coro_push_av (pTHX_ AV *av, I32 gimme_v)
2105{
2106 if (AvFILLp (av) >= 0 && gimme_v != G_VOID)
2107 {
2108 dSP;
2109
2110 if (gimme_v == G_SCALAR)
2111 XPUSHs (AvARRAY (av)[AvFILLp (av)]);
2112 else
2113 {
2114 int i;
2115 EXTEND (SP, AvFILLp (av) + 1);
2116
2117 for (i = 0; i <= AvFILLp (av); ++i)
2118 PUSHs (AvARRAY (av)[i]);
2119 }
2120
2121 PUTBACK;
2122 }
2123}
2124
2125static void
2126coro_push_on_destroy (pTHX_ struct coro *coro, SV *cb)
2127{
2128 if (!coro->on_destroy)
2129 coro->on_destroy = newAV ();
2130
2131 av_push (coro->on_destroy, cb);
2132}
2133
2134static void
2135slf_destroy_join (pTHX_ struct CoroSLF *frame)
2136{
2137 SvREFCNT_dec ((SV *)((struct coro *)frame->data)->hv);
2138}
2139
2140static int
2141slf_check_join (pTHX_ struct CoroSLF *frame)
2142{
2143 struct coro *coro = (struct coro *)frame->data;
2144
2145 if (!coro->status)
2146 return 1;
2147
2148 frame->destroy = 0;
2149
2150 coro_push_av (aTHX_ coro->status, GIMME_V);
2151
2152 SvREFCNT_dec ((SV *)coro->hv);
2153
2154 return 0;
2155}
2156
2157static void
2158slf_init_join (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2159{
2160 struct coro *coro = SvSTATE (items > 0 ? arg [0] : &PL_sv_undef);
2161
2162 if (items > 1)
2163 croak ("join called with too many arguments");
2164
2165 if (coro->status)
2166 frame->prepare = prepare_nop;
2167 else
2168 {
2169 coro_push_on_destroy (aTHX_ coro, SvREFCNT_inc_NN (SvRV (coro_current)));
2170 frame->prepare = prepare_schedule;
2171 }
2172
2173 frame->check = slf_check_join;
2174 frame->destroy = slf_destroy_join;
2175 frame->data = (void *)coro;
2176 SvREFCNT_inc (coro->hv);
2177}
2178
2179static void
2180coro_call_on_destroy (pTHX_ struct coro *coro)
2181{
2182 AV *od = coro->on_destroy;
2183
2184 if (!od)
2185 return;
2186
2187 coro->on_destroy = 0;
2188 sv_2mortal ((SV *)od);
2189
2190 while (AvFILLp (od) >= 0)
2191 {
2192 SV *cb = sv_2mortal (av_pop (od));
2193
2194 /* coro hv's (and only hv's at the moment) are supported as well */
2195 if (SvSTATEhv_p (aTHX_ cb))
2196 api_ready (aTHX_ cb);
2197 else
2198 {
2199 dSP; /* don't disturb outer sp */
2200 PUSHMARK (SP);
2201
2202 if (coro->status)
2203 {
2204 PUTBACK;
2205 coro_push_av (aTHX_ coro->status, G_ARRAY);
2206 SPAGAIN;
2207 }
2208
2209 PUTBACK;
2210 call_sv (cb, G_VOID | G_DISCARD);
2211 }
2212 }
2213}
2214
2215static void
2216coro_set_status (pTHX_ struct coro *coro, SV **arg, int items)
2217{
2218 AV *av;
2219
2220 if (coro->status)
2221 {
2222 av = coro->status;
2223 av_clear (av);
2224 }
2225 else
2226 av = coro->status = newAV ();
2227
2228 /* items are actually not so common, so optimise for this case */
2229 if (items)
2230 {
2231 int i;
2232
2233 av_extend (av, items - 1);
2234
2235 for (i = 0; i < items; ++i)
2236 av_push (av, SvREFCNT_inc_NN (arg [i]));
2237 }
2238}
2239
2240static void
2241slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2242{
2243 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2244 api_ready (aTHX_ sv_manager);
2245
2246 frame->prepare = prepare_schedule;
2247 frame->check = slf_check_repeat;
2248
2249 /* as a minor optimisation, we could unwind all stacks here */
2250 /* but that puts extra pressure on pp_slf, and is not worth much */
2251 /*coro_unwind_stacks (aTHX);*/
2252}
2253
2254static void
2255slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2256{
2257 HV *coro_hv = (HV *)SvRV (coro_current);
2258
2259 coro_set_status (aTHX_ SvSTATE ((SV *)coro_hv), arg, items);
2260 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2261}
2262
2263static void
2264slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2265{
2266 HV *coro_hv;
2267 struct coro *coro;
2268
2269 if (items <= 0)
2270 croak ("Coro::cancel called without coro object,");
2271
2272 coro = SvSTATE (arg [0]);
2273 coro_hv = coro->hv;
2274
2275 coro_set_status (aTHX_ coro, arg + 1, items - 1);
2276
2277 if (ecb_expect_false (coro->flags & CF_NOCANCEL))
2278 {
2279 /* coro currently busy cancelling something, so just notify it */
2280 coro->slf_frame.data = (void *)coro;
2281
2282 frame->prepare = prepare_nop;
2283 frame->check = slf_check_nop;
2284 }
2285 else if (coro_hv == (HV *)SvRV (coro_current))
2286 {
2287 /* cancelling the current coro is allowed, and equals terminate */
2288 slf_init_terminate_cancel_common (aTHX_ frame, coro_hv);
2289 }
2290 else
2291 {
2292 struct coro *self = SvSTATE_current;
2293
2294 if (!self)
2295 croak ("Coro::cancel called outside of thread content,");
2296
2297 /* otherwise we cancel directly, purely for speed reasons
2298 * unfortunately, this requires some magic trickery, as
2299 * somebody else could cancel us, so we have to fight the cancellation.
2300 * this is ugly, and hopefully fully worth the extra speed.
2301 * besides, I can't get the slow-but-safe version working...
2302 */
2303 slf_frame.data = 0;
2304 self->flags |= CF_NOCANCEL;
2305 coro_state_destroy (aTHX_ coro);
2306 self->flags &= ~CF_NOCANCEL;
2307
2308 if (slf_frame.data)
2309 {
2310 /* while we were busy we have been cancelled, so terminate */
2311 slf_init_terminate_cancel_common (aTHX_ frame, self->hv);
2312 }
2313 else
2314 {
2315 frame->prepare = prepare_nop;
2316 frame->check = slf_check_nop;
2317 }
2318 }
2319}
2320
2321static int
2322slf_check_safe_cancel (pTHX_ struct CoroSLF *frame)
2323{
2324 frame->prepare = 0;
2325 coro_unwind_stacks (aTHX);
2326
2327 slf_init_terminate_cancel_common (aTHX_ frame, (HV *)SvRV (coro_current));
940 2328
941 return 1; 2329 return 1;
942} 2330}
943 2331
944static int 2332static int
945api_is_ready (SV *coro_sv) 2333safe_cancel (pTHX_ struct coro *coro, SV **arg, int items)
946{ 2334{
947 return !!SvSTATE (coro_sv)->flags & CF_READY; 2335 if (coro->cctx)
948} 2336 croak ("coro inside C callback, unable to cancel at this time, caught");
949 2337
950static void 2338 if (coro->flags & CF_NEW)
951prepare_schedule (struct transfer_args *ta) 2339 {
952{ 2340 coro_set_status (aTHX_ coro, arg, items);
953 SV *prev, *next; 2341 coro_state_destroy (aTHX_ coro);
954
955 for (;;)
956 { 2342 }
957 LOCK; 2343 else
958 next = coro_deq (PRIO_MIN); 2344 {
959 UNLOCK; 2345 if (!coro->slf_frame.prepare)
2346 croak ("coro outside an SLF function, unable to cancel at this time, caught");
960 2347
961 if (next) 2348 slf_destroy (aTHX_ coro);
962 break; 2349
2350 coro_set_status (aTHX_ coro, arg, items);
2351 coro->slf_frame.prepare = prepare_nop;
2352 coro->slf_frame.check = slf_check_safe_cancel;
2353
2354 api_ready (aTHX_ (SV *)coro->hv);
2355 }
2356
2357 return 1;
2358}
2359
2360/*****************************************************************************/
2361/* async pool handler */
2362
2363static int
2364slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2365{
2366 HV *hv = (HV *)SvRV (coro_current);
2367 struct coro *coro = (struct coro *)frame->data;
2368
2369 if (!coro->invoke_cb)
2370 return 1; /* loop till we have invoke */
2371 else
2372 {
2373 hv_store (hv, "desc", sizeof ("desc") - 1,
2374 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2375
2376 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
963 2377
964 { 2378 {
965 dSP; 2379 dSP;
966 2380 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
967 ENTER;
968 SAVETMPS;
969
970 PUSHMARK (SP);
971 PUTBACK; 2381 PUTBACK;
972 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974 FREETMPS;
975 LEAVE;
976 } 2382 }
2383
2384 SvREFCNT_dec (GvAV (PL_defgv));
2385 GvAV (PL_defgv) = coro->invoke_av;
2386 coro->invoke_av = 0;
2387
2388 return 0;
2389 }
2390}
2391
2392static void
2393slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2394{
2395 HV *hv = (HV *)SvRV (coro_current);
2396 struct coro *coro = SvSTATE_hv ((SV *)hv);
2397
2398 if (ecb_expect_true (coro->saved_deffh))
977 } 2399 {
2400 /* subsequent iteration */
2401 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2402 coro->saved_deffh = 0;
978 2403
2404 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2405 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2406 {
2407 slf_init_terminate_cancel_common (aTHX_ frame, hv);
2408 return;
2409 }
2410 else
2411 {
2412 av_clear (GvAV (PL_defgv));
2413 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2414
2415 coro->prio = 0;
2416
2417 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2418 api_trace (aTHX_ coro_current, 0);
2419
2420 frame->prepare = prepare_schedule;
2421 av_push (av_async_pool, SvREFCNT_inc (hv));
2422 }
2423 }
2424 else
2425 {
2426 /* first iteration, simply fall through */
2427 frame->prepare = prepare_nop;
2428 }
2429
2430 frame->check = slf_check_pool_handler;
2431 frame->data = (void *)coro;
2432}
2433
2434/*****************************************************************************/
2435/* rouse callback */
2436
2437#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2438
2439static void
2440coro_rouse_callback (pTHX_ CV *cv)
2441{
2442 dXSARGS;
2443 SV *data = (SV *)S_GENSUB_ARG;
2444
2445 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2446 {
2447 /* first call, set args */
2448 SV *coro = SvRV (data);
2449 AV *av = newAV ();
2450
2451 SvRV_set (data, (SV *)av);
2452
2453 /* better take a full copy of the arguments */
2454 while (items--)
2455 av_store (av, items, newSVsv (ST (items)));
2456
2457 api_ready (aTHX_ coro);
2458 SvREFCNT_dec (coro);
2459 }
2460
2461 XSRETURN_EMPTY;
2462}
2463
2464static int
2465slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2466{
2467 SV *data = (SV *)frame->data;
2468
2469 if (CORO_THROW)
2470 return 0;
2471
2472 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2473 return 1;
2474
2475 /* now push all results on the stack */
2476 {
2477 dSP;
2478 AV *av = (AV *)SvRV (data);
2479 int i;
2480
2481 EXTEND (SP, AvFILLp (av) + 1);
2482 for (i = 0; i <= AvFILLp (av); ++i)
2483 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2484
2485 /* we have stolen the elements, so set length to zero and free */
2486 AvFILLp (av) = -1;
2487 av_undef (av);
2488
2489 PUTBACK;
2490 }
2491
2492 return 0;
2493}
2494
2495static void
2496slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2497{
2498 SV *cb;
2499
2500 if (items)
2501 cb = arg [0];
2502 else
2503 {
2504 struct coro *coro = SvSTATE_current;
2505
2506 if (!coro->rouse_cb)
2507 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2508
2509 cb = sv_2mortal (coro->rouse_cb);
2510 coro->rouse_cb = 0;
2511 }
2512
2513 if (!SvROK (cb)
2514 || SvTYPE (SvRV (cb)) != SVt_PVCV
2515 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2516 croak ("Coro::rouse_wait called with illegal callback argument,");
2517
2518 {
2519 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2520 SV *data = (SV *)S_GENSUB_ARG;
2521
2522 frame->data = (void *)data;
2523 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2524 frame->check = slf_check_rouse_wait;
2525 }
2526}
2527
2528static SV *
2529coro_new_rouse_cb (pTHX)
2530{
979 prev = SvRV (coro_current); 2531 HV *hv = (HV *)SvRV (coro_current);
980 SvRV_set (coro_current, next); 2532 struct coro *coro = SvSTATE_hv (hv);
2533 SV *data = newRV_inc ((SV *)hv);
2534 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
981 2535
982 /* free this only after the transfer */ 2536 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
983 LOCK; 2537 SvREFCNT_dec (data); /* magicext increases the refcount */
984 free_coro_mortal ();
985 UNLOCK;
986 coro_mortal = prev;
987 2538
988 assert (!SvROK(prev));//D 2539 SvREFCNT_dec (coro->rouse_cb);
989 assert (!SvROK(next));//D 2540 coro->rouse_cb = SvREFCNT_inc_NN (cb);
990 2541
991 ta->prev = SvSTATE (prev); 2542 return cb;
992 ta->next = SvSTATE (next);
993 ta->flags = TRANSFER_SAVE_ALL;
994
995 assert (ta->flags & CF_READY);
996 ta->next->flags &= ~CF_READY;
997} 2543}
998 2544
2545/*****************************************************************************/
2546/* schedule-like-function opcode (SLF) */
2547
2548static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2549static const CV *slf_cv;
2550static SV **slf_argv;
2551static int slf_argc, slf_arga; /* count, allocated */
2552static I32 slf_ax; /* top of stack, for restore */
2553
2554/* this restores the stack in the case we patched the entersub, to */
2555/* recreate the stack frame as perl will on following calls */
2556/* since entersub cleared the stack */
2557static OP *
2558pp_restore (pTHX)
2559{
2560 int i;
2561 SV **SP = PL_stack_base + slf_ax;
2562
2563 PUSHMARK (SP);
2564
2565 EXTEND (SP, slf_argc + 1);
2566
2567 for (i = 0; i < slf_argc; ++i)
2568 PUSHs (sv_2mortal (slf_argv [i]));
2569
2570 PUSHs ((SV *)CvGV (slf_cv));
2571
2572 RETURNOP (slf_restore.op_first);
2573}
2574
999static void 2575static void
2576slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2577{
2578 SV **arg = (SV **)slf_frame.data;
2579
2580 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2581}
2582
2583static void
2584slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2585{
2586 if (items != 2)
2587 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2588
2589 frame->prepare = slf_prepare_transfer;
2590 frame->check = slf_check_nop;
2591 frame->data = (void *)arg; /* let's hope it will stay valid */
2592}
2593
2594static void
2595slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2596{
2597 frame->prepare = prepare_schedule;
2598 frame->check = slf_check_nop;
2599}
2600
2601static void
1000prepare_cede (struct transfer_args *ta) 2602slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1001{ 2603{
2604 struct coro *next = (struct coro *)slf_frame.data;
2605
2606 SvREFCNT_inc_NN (next->hv);
2607 prepare_schedule_to (aTHX_ ta, next);
2608}
2609
2610static void
2611slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2612{
2613 if (!items)
2614 croak ("Coro::schedule_to expects a coroutine argument, caught");
2615
2616 frame->data = (void *)SvSTATE (arg [0]);
2617 frame->prepare = slf_prepare_schedule_to;
2618 frame->check = slf_check_nop;
2619}
2620
2621static void
2622slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2623{
1002 api_ready (coro_current); 2624 api_ready (aTHX_ SvRV (coro_current));
1003 2625
1004 prepare_schedule (ta); 2626 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
1005} 2627}
1006 2628
1007static void 2629static void
1008api_schedule (void) 2630slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1009{ 2631{
2632 frame->prepare = prepare_cede;
2633 frame->check = slf_check_nop;
2634}
2635
2636static void
2637slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2638{
2639 frame->prepare = prepare_cede_notself;
2640 frame->check = slf_check_nop;
2641}
2642
2643/* "undo"/cancel a running slf call - used when cancelling a coro, mainly */
2644static void
2645slf_destroy (pTHX_ struct coro *coro)
2646{
2647 struct CoroSLF frame = coro->slf_frame;
2648
2649 /*
2650 * The on_destroy below most likely is from an SLF call.
2651 * Since by definition the SLF call will not finish when we destroy
2652 * the coro, we will have to force-finish it here, otherwise
2653 * cleanup functions cannot call SLF functions.
2654 */
2655 coro->slf_frame.prepare = 0;
2656
2657 /* this callback is reserved for slf functions needing to do cleanup */
2658 if (frame.destroy && frame.prepare && !PL_dirty)
2659 frame.destroy (aTHX_ &frame);
2660}
2661
2662/*
2663 * these not obviously related functions are all rolled into one
2664 * function to increase chances that they all will call transfer with the same
2665 * stack offset
2666 * SLF stands for "schedule-like-function".
2667 */
2668static OP *
2669pp_slf (pTHX)
2670{
2671 I32 checkmark; /* mark SP to see how many elements check has pushed */
2672
2673 /* set up the slf frame, unless it has already been set-up */
2674 /* the latter happens when a new coro has been started */
2675 /* or when a new cctx was attached to an existing coroutine */
2676 if (ecb_expect_true (!slf_frame.prepare))
2677 {
2678 /* first iteration */
2679 dSP;
2680 SV **arg = PL_stack_base + TOPMARK + 1;
2681 int items = SP - arg; /* args without function object */
2682 SV *gv = *sp;
2683
2684 /* do a quick consistency check on the "function" object, and if it isn't */
2685 /* for us, divert to the real entersub */
2686 if (SvTYPE (gv) != SVt_PVGV
2687 || !GvCV (gv)
2688 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2689 return PL_ppaddr[OP_ENTERSUB](aTHX);
2690
2691 if (!(PL_op->op_flags & OPf_STACKED))
2692 {
2693 /* ampersand-form of call, use @_ instead of stack */
2694 AV *av = GvAV (PL_defgv);
2695 arg = AvARRAY (av);
2696 items = AvFILLp (av) + 1;
2697 }
2698
2699 /* now call the init function, which needs to set up slf_frame */
2700 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2701 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2702
2703 /* pop args */
2704 SP = PL_stack_base + POPMARK;
2705
2706 PUTBACK;
2707 }
2708
2709 /* now that we have a slf_frame, interpret it! */
2710 /* we use a callback system not to make the code needlessly */
2711 /* complicated, but so we can run multiple perl coros from one cctx */
2712
2713 do
2714 {
1010 struct transfer_args ta; 2715 struct coro_transfer_args ta;
1011 2716
1012 prepare_schedule (&ta); 2717 slf_frame.prepare (aTHX_ &ta);
1013 TRANSFER (ta); 2718 TRANSFER (ta, 0);
1014}
1015 2719
2720 checkmark = PL_stack_sp - PL_stack_base;
2721 }
2722 while (slf_frame.check (aTHX_ &slf_frame));
2723
2724 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2725
2726 /* exception handling */
2727 if (ecb_expect_false (CORO_THROW))
2728 {
2729 SV *exception = sv_2mortal (CORO_THROW);
2730
2731 CORO_THROW = 0;
2732 sv_setsv (ERRSV, exception);
2733 croak (0);
2734 }
2735
2736 /* return value handling - mostly like entersub */
2737 /* make sure we put something on the stack in scalar context */
2738 if (GIMME_V == G_SCALAR
2739 && ecb_expect_false (PL_stack_sp != PL_stack_base + checkmark + 1))
2740 {
2741 dSP;
2742 SV **bot = PL_stack_base + checkmark;
2743
2744 if (sp == bot) /* too few, push undef */
2745 bot [1] = &PL_sv_undef;
2746 else /* too many, take last one */
2747 bot [1] = *sp;
2748
2749 SP = bot + 1;
2750
2751 PUTBACK;
2752 }
2753
2754 return NORMAL;
2755}
2756
2757static void
2758api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2759{
2760 int i;
2761 SV **arg = PL_stack_base + ax;
2762 int items = PL_stack_sp - arg + 1;
2763
2764 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2765
2766 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2767 && PL_op->op_ppaddr != pp_slf)
2768 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2769
2770 CvFLAGS (cv) |= CVf_SLF;
2771 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2772 slf_cv = cv;
2773
2774 /* we patch the op, and then re-run the whole call */
2775 /* we have to put the same argument on the stack for this to work */
2776 /* and this will be done by pp_restore */
2777 slf_restore.op_next = (OP *)&slf_restore;
2778 slf_restore.op_type = OP_CUSTOM;
2779 slf_restore.op_ppaddr = pp_restore;
2780 slf_restore.op_first = PL_op;
2781
2782 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2783
2784 if (PL_op->op_flags & OPf_STACKED)
2785 {
2786 if (items > slf_arga)
2787 {
2788 slf_arga = items;
2789 Safefree (slf_argv);
2790 New (0, slf_argv, slf_arga, SV *);
2791 }
2792
2793 slf_argc = items;
2794
2795 for (i = 0; i < items; ++i)
2796 slf_argv [i] = SvREFCNT_inc (arg [i]);
2797 }
2798 else
2799 slf_argc = 0;
2800
2801 PL_op->op_ppaddr = pp_slf;
2802 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2803
2804 PL_op = (OP *)&slf_restore;
2805}
2806
2807/*****************************************************************************/
2808/* dynamic wind */
2809
2810static void
2811on_enterleave_call (pTHX_ SV *cb)
2812{
2813 dSP;
2814
2815 PUSHSTACK;
2816
2817 PUSHMARK (SP);
2818 PUTBACK;
2819 call_sv (cb, G_VOID | G_DISCARD);
2820 SPAGAIN;
2821
2822 POPSTACK;
2823}
2824
2825static SV *
2826coro_avp_pop_and_free (pTHX_ AV **avp)
2827{
2828 AV *av = *avp;
2829 SV *res = av_pop (av);
2830
2831 if (AvFILLp (av) < 0)
2832 {
2833 *avp = 0;
2834 SvREFCNT_dec (av);
2835 }
2836
2837 return res;
2838}
2839
2840static void
2841coro_pop_on_enter (pTHX_ void *coro)
2842{
2843 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2844 SvREFCNT_dec (cb);
2845}
2846
2847static void
2848coro_pop_on_leave (pTHX_ void *coro)
2849{
2850 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2851 on_enterleave_call (aTHX_ sv_2mortal (cb));
2852}
2853
2854static void
2855enterleave_hook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, void *arg)
2856{
2857 if (!hook)
2858 return;
2859
2860 if (!*avp)
2861 {
2862 *avp = newAV ();
2863 AvREAL_off (*avp);
2864 }
2865
2866 av_push (*avp, (SV *)hook);
2867 av_push (*avp, (SV *)arg);
2868}
2869
2870static void
2871enterleave_unhook_xs (pTHX_ struct coro *coro, AV **avp, coro_enterleave_hook hook, int execute)
2872{
2873 AV *av = *avp;
2874 int i;
2875
2876 if (!av)
2877 return;
2878
2879 for (i = AvFILLp (av) - 1; i >= 0; i -= 2)
2880 if (AvARRAY (av)[i] == (SV *)hook)
2881 {
2882 if (execute)
2883 hook ((void *)AvARRAY (av)[i + 1]);
2884
2885 memmove (AvARRAY (av) + i, AvARRAY (av) + i + 2, AvFILLp (av) - i - 1);
2886 av_pop (av);
2887 av_pop (av);
2888 break;
2889 }
2890
2891 if (AvFILLp (av) >= 0)
2892 {
2893 *avp = 0;
2894 SvREFCNT_dec_NN (av);
2895 }
2896}
2897
2898static void
2899api_enterleave_hook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2900{
2901 struct coro *coro = SvSTATE (coro_sv);
2902
2903 if (SvSTATE_current == coro)
2904 if (enter)
2905 enter (aTHX enter_arg);
2906
2907 enterleave_hook_xs (aTHX_ coro, &coro->on_enter_xs, enter, enter_arg);
2908 enterleave_hook_xs (aTHX_ coro, &coro->on_leave_xs, leave, leave_arg);
2909}
2910
2911static void
2912api_enterleave_unhook (pTHX_ SV *coro_sv, coro_enterleave_hook enter, coro_enterleave_hook leave)
2913{
2914 struct coro *coro = SvSTATE (coro_sv);
2915
2916 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2917 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, SvSTATE_current == coro);
2918}
2919
2920static void
2921savedestructor_unhook_enter (pTHX_ coro_enterleave_hook enter)
2922{
2923 struct coro *coro = SvSTATE_current;
2924
2925 enterleave_unhook_xs (aTHX_ coro, &coro->on_enter_xs, enter, 0);
2926}
2927
2928static void
2929savedestructor_unhook_leave (pTHX_ coro_enterleave_hook leave)
2930{
2931 struct coro *coro = SvSTATE_current;
2932
2933 enterleave_unhook_xs (aTHX_ coro, &coro->on_leave_xs, leave, 1);
2934}
2935
2936static void
2937api_enterleave_scope_hook (pTHX_ coro_enterleave_hook enter, void *enter_arg, coro_enterleave_hook leave, void *leave_arg)
2938{
2939 api_enterleave_hook (aTHX_ coro_current, enter, enter_arg, leave, leave_arg);
2940
2941 /* this ought to be much cheaper than malloc + a single destructor call */
2942 if (enter) SAVEDESTRUCTOR_X (savedestructor_unhook_enter, enter);
2943 if (leave) SAVEDESTRUCTOR_X (savedestructor_unhook_leave, leave);
2944}
2945
2946/*****************************************************************************/
2947/* PerlIO::cede */
2948
2949typedef struct
2950{
2951 PerlIOBuf base;
2952 NV next, every;
2953} PerlIOCede;
2954
2955static IV ecb_cold
2956PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2957{
2958 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2959
2960 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2961 self->next = nvtime () + self->every;
2962
2963 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2964}
2965
2966static SV * ecb_cold
2967PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2968{
2969 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2970
2971 return newSVnv (self->every);
2972}
2973
2974static IV
2975PerlIOCede_flush (pTHX_ PerlIO *f)
2976{
2977 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2978 double now = nvtime ();
2979
2980 if (now >= self->next)
2981 {
2982 api_cede (aTHX);
2983 self->next = now + self->every;
2984 }
2985
2986 return PerlIOBuf_flush (aTHX_ f);
2987}
2988
2989static PerlIO_funcs PerlIO_cede =
2990{
2991 sizeof(PerlIO_funcs),
2992 "cede",
2993 sizeof(PerlIOCede),
2994 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2995 PerlIOCede_pushed,
2996 PerlIOBuf_popped,
2997 PerlIOBuf_open,
2998 PerlIOBase_binmode,
2999 PerlIOCede_getarg,
3000 PerlIOBase_fileno,
3001 PerlIOBuf_dup,
3002 PerlIOBuf_read,
3003 PerlIOBuf_unread,
3004 PerlIOBuf_write,
3005 PerlIOBuf_seek,
3006 PerlIOBuf_tell,
3007 PerlIOBuf_close,
3008 PerlIOCede_flush,
3009 PerlIOBuf_fill,
3010 PerlIOBase_eof,
3011 PerlIOBase_error,
3012 PerlIOBase_clearerr,
3013 PerlIOBase_setlinebuf,
3014 PerlIOBuf_get_base,
3015 PerlIOBuf_bufsiz,
3016 PerlIOBuf_get_ptr,
3017 PerlIOBuf_get_cnt,
3018 PerlIOBuf_set_ptrcnt,
3019};
3020
3021/*****************************************************************************/
3022/* Coro::Semaphore & Coro::Signal */
3023
3024static SV *
3025coro_waitarray_new (pTHX_ int count)
3026{
3027 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
3028 AV *av = newAV ();
3029 SV **ary;
3030
3031 /* unfortunately, building manually saves memory */
3032 Newx (ary, 2, SV *);
3033 AvALLOC (av) = ary;
3034#if PERL_VERSION_ATLEAST (5,10,0)
3035 AvARRAY (av) = ary;
3036#else
3037 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
3038 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
3039 SvPVX ((SV *)av) = (char *)ary;
3040#endif
3041 AvMAX (av) = 1;
3042 AvFILLp (av) = 0;
3043 ary [0] = newSViv (count);
3044
3045 return newRV_noinc ((SV *)av);
3046}
3047
3048/* semaphore */
3049
3050static void
3051coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
3052{
3053 SV *count_sv = AvARRAY (av)[0];
3054 IV count = SvIVX (count_sv);
3055
3056 count += adjust;
3057 SvIVX (count_sv) = count;
3058
3059 /* now wake up as many waiters as are expected to lock */
3060 while (count > 0 && AvFILLp (av) > 0)
3061 {
3062 SV *cb;
3063
3064 /* swap first two elements so we can shift a waiter */
3065 AvARRAY (av)[0] = AvARRAY (av)[1];
3066 AvARRAY (av)[1] = count_sv;
3067 cb = av_shift (av);
3068
3069 if (SvOBJECT (cb))
3070 {
3071 api_ready (aTHX_ cb);
3072 --count;
3073 }
3074 else if (SvTYPE (cb) == SVt_PVCV)
3075 {
3076 dSP;
3077 PUSHMARK (SP);
3078 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3079 PUTBACK;
3080 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3081 }
3082
3083 SvREFCNT_dec_NN (cb);
3084 }
3085}
3086
3087static void
3088coro_semaphore_destroy (pTHX_ struct CoroSLF *frame)
3089{
3090 /* call $sem->adjust (0) to possibly wake up some other waiters */
3091 coro_semaphore_adjust (aTHX_ (AV *)frame->data, 0);
3092}
3093
1016static void 3094static int
1017api_cede (void) 3095slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1018{ 3096{
1019 struct transfer_args ta; 3097 AV *av = (AV *)frame->data;
3098 SV *count_sv = AvARRAY (av)[0];
3099 SV *coro_hv = SvRV (coro_current);
1020 3100
1021 prepare_cede (&ta); 3101 frame->destroy = 0;
1022 TRANSFER (ta);
1023}
1024 3102
3103 /* if we are about to throw, don't actually acquire the lock, just throw */
3104 if (ecb_expect_false (CORO_THROW))
3105 {
3106 /* we still might be responsible for the semaphore, so wake up others */
3107 coro_semaphore_adjust (aTHX_ av, 0);
3108
3109 return 0;
3110 }
3111 else if (SvIVX (count_sv) > 0)
3112 {
3113 if (acquire)
3114 SvIVX (count_sv) = SvIVX (count_sv) - 1;
3115 else
3116 coro_semaphore_adjust (aTHX_ av, 0);
3117
3118 return 0;
3119 }
3120 else
3121 {
3122 int i;
3123 /* if we were woken up but can't down, we look through the whole */
3124 /* waiters list and only add us if we aren't in there already */
3125 /* this avoids some degenerate memory usage cases */
3126 for (i = AvFILLp (av); i > 0; --i) /* i > 0 is not an off-by-one bug */
3127 if (AvARRAY (av)[i] == coro_hv)
3128 return 1;
3129
3130 av_push (av, SvREFCNT_inc (coro_hv));
3131 return 1;
3132 }
3133}
3134
3135static int
3136slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
3137{
3138 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
3139}
3140
3141static int
3142slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
3143{
3144 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
3145}
3146
3147static void
3148slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3149{
3150 AV *av = (AV *)SvRV (arg [0]);
3151
3152 if (SvIVX (AvARRAY (av)[0]) > 0)
3153 {
3154 frame->data = (void *)av;
3155 frame->prepare = prepare_nop;
3156 }
3157 else
3158 {
3159 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
3160
3161 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
3162 frame->prepare = prepare_schedule;
3163 /* to avoid race conditions when a woken-up coro gets terminated */
3164 /* we arrange for a temporary on_destroy that calls adjust (0) */
3165 frame->destroy = coro_semaphore_destroy;
3166 }
3167}
3168
3169static void
3170slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3171{
3172 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3173 frame->check = slf_check_semaphore_down;
3174}
3175
3176static void
3177slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3178{
3179 if (items >= 2)
3180 {
3181 /* callback form */
3182 AV *av = (AV *)SvRV (arg [0]);
3183 SV *cb_cv = s_get_cv_croak (arg [1]);
3184
3185 av_push (av, SvREFCNT_inc_NN (cb_cv));
3186
3187 if (SvIVX (AvARRAY (av)[0]) > 0)
3188 coro_semaphore_adjust (aTHX_ av, 0);
3189
3190 frame->prepare = prepare_nop;
3191 frame->check = slf_check_nop;
3192 }
3193 else
3194 {
3195 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
3196 frame->check = slf_check_semaphore_wait;
3197 }
3198}
3199
3200/* signal */
3201
3202static void
3203coro_signal_wake (pTHX_ AV *av, int count)
3204{
3205 SvIVX (AvARRAY (av)[0]) = 0;
3206
3207 /* now signal count waiters */
3208 while (count > 0 && AvFILLp (av) > 0)
3209 {
3210 SV *cb;
3211
3212 /* swap first two elements so we can shift a waiter */
3213 cb = AvARRAY (av)[0];
3214 AvARRAY (av)[0] = AvARRAY (av)[1];
3215 AvARRAY (av)[1] = cb;
3216
3217 cb = av_shift (av);
3218
3219 if (SvTYPE (cb) == SVt_PVCV)
3220 {
3221 dSP;
3222 PUSHMARK (SP);
3223 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
3224 PUTBACK;
3225 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
3226 }
3227 else
3228 {
3229 api_ready (aTHX_ cb);
3230 sv_setiv (cb, 0); /* signal waiter */
3231 }
3232
3233 SvREFCNT_dec_NN (cb);
3234
3235 --count;
3236 }
3237}
3238
3239static int
3240slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
3241{
3242 /* if we are about to throw, also stop waiting */
3243 return SvROK ((SV *)frame->data) && !CORO_THROW;
3244}
3245
3246static void
3247slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3248{
3249 AV *av = (AV *)SvRV (arg [0]);
3250
3251 if (items >= 2)
3252 {
3253 SV *cb_cv = s_get_cv_croak (arg [1]);
3254 av_push (av, SvREFCNT_inc_NN (cb_cv));
3255
3256 if (SvIVX (AvARRAY (av)[0]))
3257 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
3258
3259 frame->prepare = prepare_nop;
3260 frame->check = slf_check_nop;
3261 }
3262 else if (SvIVX (AvARRAY (av)[0]))
3263 {
3264 SvIVX (AvARRAY (av)[0]) = 0;
3265 frame->prepare = prepare_nop;
3266 frame->check = slf_check_nop;
3267 }
3268 else
3269 {
3270 SV *waiter = newSVsv (coro_current); /* owned by signal av */
3271
3272 av_push (av, waiter);
3273
3274 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
3275 frame->prepare = prepare_schedule;
3276 frame->check = slf_check_signal_wait;
3277 }
3278}
3279
3280/*****************************************************************************/
3281/* Coro::AIO */
3282
3283#define CORO_MAGIC_type_aio PERL_MAGIC_ext
3284
3285/* helper storage struct */
3286struct io_state
3287{
3288 int errorno;
3289 I32 laststype; /* U16 in 5.10.0 */
3290 int laststatval;
3291 Stat_t statcache;
3292};
3293
3294static void
3295coro_aio_callback (pTHX_ CV *cv)
3296{
3297 dXSARGS;
3298 AV *state = (AV *)S_GENSUB_ARG;
3299 SV *coro = av_pop (state);
3300 SV *data_sv = newSV (sizeof (struct io_state));
3301
3302 av_extend (state, items - 1);
3303
3304 sv_upgrade (data_sv, SVt_PV);
3305 SvCUR_set (data_sv, sizeof (struct io_state));
3306 SvPOK_only (data_sv);
3307
3308 {
3309 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3310
3311 data->errorno = errno;
3312 data->laststype = PL_laststype;
3313 data->laststatval = PL_laststatval;
3314 data->statcache = PL_statcache;
3315 }
3316
3317 /* now build the result vector out of all the parameters and the data_sv */
3318 {
3319 int i;
3320
3321 for (i = 0; i < items; ++i)
3322 av_push (state, SvREFCNT_inc_NN (ST (i)));
3323 }
3324
3325 av_push (state, data_sv);
3326
3327 api_ready (aTHX_ coro);
3328 SvREFCNT_dec_NN (coro);
3329 SvREFCNT_dec_NN ((AV *)state);
3330}
3331
3332static int
3333slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3334{
3335 AV *state = (AV *)frame->data;
3336
3337 /* if we are about to throw, return early */
3338 /* this does not cancel the aio request, but at least */
3339 /* it quickly returns */
3340 if (CORO_THROW)
3341 return 0;
3342
3343 /* one element that is an RV? repeat! */
3344 if (AvFILLp (state) == 0 && SvTYPE (AvARRAY (state)[0]) != SVt_PV)
3345 return 1;
3346
3347 /* restore status */
3348 {
3349 SV *data_sv = av_pop (state);
3350 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3351
3352 errno = data->errorno;
3353 PL_laststype = data->laststype;
3354 PL_laststatval = data->laststatval;
3355 PL_statcache = data->statcache;
3356
3357 SvREFCNT_dec_NN (data_sv);
3358 }
3359
3360 /* push result values */
3361 {
3362 dSP;
3363 int i;
3364
3365 EXTEND (SP, AvFILLp (state) + 1);
3366 for (i = 0; i <= AvFILLp (state); ++i)
3367 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3368
3369 PUTBACK;
3370 }
3371
3372 return 0;
3373}
3374
3375static void
3376slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
3377{
3378 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
3379 SV *coro_hv = SvRV (coro_current);
3380 struct coro *coro = SvSTATE_hv (coro_hv);
3381
3382 /* put our coroutine id on the state arg */
3383 av_push (state, SvREFCNT_inc_NN (coro_hv));
3384
3385 /* first see whether we have a non-zero priority and set it as AIO prio */
3386 if (coro->prio)
3387 {
3388 dSP;
3389
3390 static SV *prio_cv;
3391 static SV *prio_sv;
3392
3393 if (ecb_expect_false (!prio_cv))
3394 {
3395 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3396 prio_sv = newSViv (0);
3397 }
3398
3399 PUSHMARK (SP);
3400 sv_setiv (prio_sv, coro->prio);
3401 XPUSHs (prio_sv);
3402
3403 PUTBACK;
3404 call_sv (prio_cv, G_VOID | G_DISCARD);
3405 }
3406
3407 /* now call the original request */
3408 {
3409 dSP;
3410 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3411 int i;
3412
3413 PUSHMARK (SP);
3414
3415 /* first push all args to the stack */
3416 EXTEND (SP, items + 1);
3417
3418 for (i = 0; i < items; ++i)
3419 PUSHs (arg [i]);
3420
3421 /* now push the callback closure */
3422 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3423
3424 /* now call the AIO function - we assume our request is uncancelable */
3425 PUTBACK;
3426 call_sv ((SV *)req, G_VOID | G_DISCARD);
3427 }
3428
3429 /* now that the request is going, we loop till we have a result */
3430 frame->data = (void *)state;
3431 frame->prepare = prepare_schedule;
3432 frame->check = slf_check_aio_req;
3433}
3434
3435static void
3436coro_aio_req_xs (pTHX_ CV *cv)
3437{
3438 dXSARGS;
3439
3440 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3441
3442 XSRETURN_EMPTY;
3443}
3444
3445/*****************************************************************************/
3446
3447#if CORO_CLONE
3448# include "clone.c"
3449#endif
3450
3451/*****************************************************************************/
3452
3453static SV *
3454coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3455{
3456 SV *coro_sv;
3457 struct coro *coro;
3458 MAGIC *mg;
3459 HV *hv;
3460 SV *cb;
3461 int i;
3462
3463 if (argc > 0)
3464 {
3465 cb = s_get_cv_croak (argv [0]);
3466
3467 if (!is_coro)
3468 {
3469 if (CvISXSUB (cb))
3470 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3471
3472 if (!CvROOT (cb))
3473 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3474 }
3475 }
3476
3477 Newz (0, coro, 1, struct coro);
3478 coro->args = newAV ();
3479 coro->flags = CF_NEW;
3480
3481 if (coro_first) coro_first->prev = coro;
3482 coro->next = coro_first;
3483 coro_first = coro;
3484
3485 coro->hv = hv = newHV ();
3486 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3487 mg->mg_flags |= MGf_DUP;
3488 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3489
3490 if (argc > 0)
3491 {
3492 av_extend (coro->args, argc + is_coro - 1);
3493
3494 if (is_coro)
3495 {
3496 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3497 cb = (SV *)cv_coro_run;
3498 }
3499
3500 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3501
3502 for (i = 1; i < argc; i++)
3503 av_push (coro->args, newSVsv (argv [i]));
3504 }
3505
3506 return coro_sv;
3507}
3508
3509#ifndef __cplusplus
3510ecb_cold XS(boot_Coro__State);
3511#endif
3512
3513#if CORO_JIT
3514
3515static void ecb_noinline ecb_cold
3516pushav_4uv (pTHX_ UV a, UV b, UV c, UV d)
3517{
3518 dSP;
3519 AV *av = newAV ();
3520
3521 av_store (av, 3, newSVuv (d));
3522 av_store (av, 2, newSVuv (c));
3523 av_store (av, 1, newSVuv (b));
3524 av_store (av, 0, newSVuv (a));
3525
3526 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
3527
3528 PUTBACK;
3529}
3530
3531static void ecb_noinline ecb_cold
3532jit_init (pTHX)
3533{
3534 dSP;
3535 SV *load, *save;
3536 char *map_base;
3537 char *load_ptr, *save_ptr;
3538 STRLEN load_len, save_len, map_len;
3539 int count;
3540
3541 eval_pv ("require 'Coro/jit-" CORO_JIT_TYPE ".pl'", 1);
3542
3543 PUSHMARK (SP);
3544 #define VARx(name,expr,type) pushav_4uv (aTHX_ (UV)&(expr), sizeof (expr), offsetof (perl_slots, name), sizeof (type));
3545 #include "state.h"
3546 count = call_pv ("Coro::State::_jit", G_ARRAY);
3547 SPAGAIN;
3548
3549 save = POPs; save_ptr = SvPVbyte (save, save_len);
3550 load = POPs; load_ptr = SvPVbyte (load, load_len);
3551
3552 map_len = load_len + save_len + 16;
3553
3554 map_base = mmap (0, map_len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3555
3556 assert (("Coro: unable to mmap jit code page, cannot continue.", map_base != (char *)MAP_FAILED));
3557
3558 load_perl_slots = (load_save_perl_slots_type)map_base;
3559 memcpy (map_base, load_ptr, load_len);
3560
3561 map_base += (load_len + 15) & ~15;
3562
3563 save_perl_slots = (load_save_perl_slots_type)map_base;
3564 memcpy (map_base, save_ptr, save_len);
3565
3566 /* we are good citizens and try to make the page read-only, so the evil evil */
3567 /* hackers might have it a bit more difficult */
3568 mprotect (map_base, map_len, PROT_READ | PROT_EXEC);
3569
3570 PUTBACK;
3571 eval_pv ("undef &Coro::State::_jit", 1);
3572}
3573
3574#endif
3575
1025MODULE = Coro::State PACKAGE = Coro::State 3576MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026 3577
1027PROTOTYPES: DISABLE 3578PROTOTYPES: DISABLE
1028 3579
1029BOOT: 3580BOOT:
1030{ 3581{
3582#define VARx(name,expr,type) if (sizeof (type) < sizeof (expr)) croak ("FATAL: Coro thread context slot '" # name "' too small for this version of perl.");
3583#include "state.h"
1031#ifdef USE_ITHREADS 3584#ifdef USE_ITHREADS
1032 MUTEX_INIT (&coro_mutex); 3585# if CORO_PTHREAD
3586 coro_thx = PERL_GET_CONTEXT;
1033#endif 3587# endif
1034 BOOT_PAGESIZE; 3588#endif
3589 /* perl defines these to check for existance first, but why it doesn't */
3590 /* just create them one at init time is not clear to me, except for */
3591 /* programs trying to delete them, but... */
3592 /* anyway, we declare this as invalid and make sure they are initialised here */
3593 DEFSV;
3594 ERRSV;
3595
3596 cctx_current = cctx_new_empty ();
3597
3598 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3599 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3600
3601 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3602 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3603 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3604
3605 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3606 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3607 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1035 3608
1036 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3609 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037 3610
1038 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3611 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1039 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3612 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1040 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3613 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
3614 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1041 3615
1042 main_mainstack = PL_mainstack; 3616 main_mainstack = PL_mainstack;
3617 main_top_env = PL_top_env;
1043 3618
3619 while (main_top_env->je_prev)
3620 main_top_env = main_top_env->je_prev;
3621
3622 {
3623 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3624
3625 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3626 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3627
3628 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3629 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3630 }
3631
1044 coroapi.ver = CORO_API_VERSION; 3632 coroapi.ver = CORO_API_VERSION;
3633 coroapi.rev = CORO_API_REVISION;
3634
1045 coroapi.transfer = api_transfer; 3635 coroapi.transfer = api_transfer;
1046 3636
3637 coroapi.sv_state = SvSTATE_;
3638 coroapi.execute_slf = api_execute_slf;
3639 coroapi.prepare_nop = prepare_nop;
3640 coroapi.prepare_schedule = prepare_schedule;
3641 coroapi.prepare_cede = prepare_cede;
3642 coroapi.prepare_cede_notself = prepare_cede_notself;
3643
3644 time_init (aTHX);
3645
1047 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 3646 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3647#if CORO_JIT
3648 PUTBACK;
3649 jit_init (aTHX);
3650 SPAGAIN;
3651#endif
1048} 3652}
1049 3653
1050SV * 3654SV *
1051new (char *klass, ...) 3655new (SV *klass, ...)
3656 ALIAS:
3657 Coro::new = 1
1052 CODE: 3658 CODE:
1053{ 3659 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
1054 struct coro *coro; 3660 OUTPUT:
1055 HV *hv;
1056 int i;
1057
1058 Newz (0, coro, 1, struct coro);
1059 coro->args = newAV ();
1060 coro->flags = CF_NEW;
1061
1062 hv = newHV ();
1063 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065
1066 for (i = 1; i < items; i++)
1067 av_push (coro->args, newSVsv (ST (i)));
1068}
1069 OUTPUT:
1070 RETVAL 3661 RETVAL
1071 3662
1072void 3663void
1073_set_stacklevel (...) 3664transfer (...)
1074 ALIAS: 3665 PROTOTYPE: $$
1075 Coro::State::transfer = 1 3666 CODE:
1076 Coro::schedule = 2 3667 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1077 Coro::cede = 3
1078 CODE:
1079{
1080 struct transfer_args ta;
1081 3668
1082 switch (ix) 3669SV *
3670clone (Coro::State coro)
3671 CODE:
3672{
3673#if CORO_CLONE
3674 struct coro *ncoro = coro_clone (aTHX_ coro);
3675 MAGIC *mg;
3676 /* TODO: too much duplication */
3677 ncoro->hv = newHV ();
3678 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3679 mg->mg_flags |= MGf_DUP;
3680 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3681#else
3682 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3683#endif
3684}
3685 OUTPUT:
3686 RETVAL
3687
3688int
3689cctx_stacksize (int new_stacksize = 0)
3690 PROTOTYPE: ;$
3691 CODE:
3692 RETVAL = cctx_stacksize;
3693 if (new_stacksize)
1083 { 3694 {
1084 case 0: 3695 cctx_stacksize = new_stacksize;
1085 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 3696 ++cctx_gen;
1086 ta.next = 0;
1087 ta.flags = TRANSFER_SET_STACKLEVEL;
1088 break;
1089
1090 case 1:
1091 if (items != 3)
1092 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1093
1094 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1095 break;
1096
1097 case 2:
1098 prepare_schedule (&ta);
1099 break;
1100
1101 case 3:
1102 prepare_cede (&ta);
1103 break;
1104 } 3697 }
3698 OUTPUT:
3699 RETVAL
1105 3700
1106 TRANSFER (ta); 3701int
1107} 3702cctx_max_idle (int max_idle = 0)
1108 3703 PROTOTYPE: ;$
1109void
1110_clone_state_from (SV *dst, SV *src)
1111 CODE: 3704 CODE:
1112{ 3705 RETVAL = cctx_max_idle;
1113 struct coro *coro_src = SvSTATE (src); 3706 if (max_idle > 1)
1114 3707 cctx_max_idle = max_idle;
1115 sv_unmagic (SvRV (dst), PERL_MAGIC_ext); 3708 OUTPUT:
1116 3709 RETVAL
1117 ++coro_src->refcnt;
1118 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119}
1120
1121void
1122_exit (code)
1123 int code
1124 PROTOTYPE: $
1125 CODE:
1126 _exit (code);
1127 3710
1128int 3711int
1129cctx_count () 3712cctx_count ()
3713 PROTOTYPE:
1130 CODE: 3714 CODE:
1131 RETVAL = cctx_count; 3715 RETVAL = cctx_count;
1132 OUTPUT: 3716 OUTPUT:
1133 RETVAL 3717 RETVAL
1134 3718
1135int 3719int
1136cctx_idle () 3720cctx_idle ()
3721 PROTOTYPE:
1137 CODE: 3722 CODE:
1138 RETVAL = cctx_idle; 3723 RETVAL = cctx_idle;
1139 OUTPUT: 3724 OUTPUT:
1140 RETVAL 3725 RETVAL
1141 3726
3727void
3728list ()
3729 PROTOTYPE:
3730 PPCODE:
3731{
3732 struct coro *coro;
3733 for (coro = coro_first; coro; coro = coro->next)
3734 if (coro->hv)
3735 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3736}
3737
3738void
3739call (Coro::State coro, SV *coderef)
3740 ALIAS:
3741 eval = 1
3742 CODE:
3743{
3744 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3745 {
3746 struct coro *current = SvSTATE_current;
3747 struct CoroSLF slf_save;
3748
3749 if (current != coro)
3750 {
3751 PUTBACK;
3752 save_perl (aTHX_ current);
3753 load_perl (aTHX_ coro);
3754 /* the coro is most likely in an active SLF call.
3755 * while not strictly required (the code we execute is
3756 * not allowed to call any SLF functions), it's cleaner
3757 * to reinitialise the slf_frame and restore it later.
3758 * This might one day allow us to actually do SLF calls
3759 * from code executed here.
3760 */
3761 slf_save = slf_frame;
3762 slf_frame.prepare = 0;
3763 SPAGAIN;
3764 }
3765
3766 PUSHSTACK;
3767
3768 PUSHMARK (SP);
3769 PUTBACK;
3770
3771 if (ix)
3772 eval_sv (coderef, 0);
3773 else
3774 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3775
3776 POPSTACK;
3777 SPAGAIN;
3778
3779 if (current != coro)
3780 {
3781 PUTBACK;
3782 slf_frame = slf_save;
3783 save_perl (aTHX_ coro);
3784 load_perl (aTHX_ current);
3785 SPAGAIN;
3786 }
3787 }
3788}
3789
3790SV *
3791is_ready (Coro::State coro)
3792 PROTOTYPE: $
3793 ALIAS:
3794 is_ready = CF_READY
3795 is_running = CF_RUNNING
3796 is_new = CF_NEW
3797 is_destroyed = CF_ZOMBIE
3798 is_zombie = CF_ZOMBIE
3799 is_suspended = CF_SUSPENDED
3800 CODE:
3801 RETVAL = boolSV (coro->flags & ix);
3802 OUTPUT:
3803 RETVAL
3804
3805void
3806throw (SV *self, SV *exception = &PL_sv_undef)
3807 PROTOTYPE: $;$
3808 CODE:
3809{
3810 struct coro *coro = SvSTATE (self);
3811 struct coro *current = SvSTATE_current;
3812 SV **exceptionp = coro == current ? &CORO_THROW : &coro->except;
3813 SvREFCNT_dec (*exceptionp);
3814 SvGETMAGIC (exception);
3815 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3816
3817 api_ready (aTHX_ self);
3818}
3819
3820void
3821api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3822 PROTOTYPE: $;$
3823 C_ARGS: aTHX_ coro, flags
3824
3825SV *
3826has_cctx (Coro::State coro)
3827 PROTOTYPE: $
3828 CODE:
3829 /* maybe manage the running flag differently */
3830 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3831 OUTPUT:
3832 RETVAL
3833
3834int
3835is_traced (Coro::State coro)
3836 PROTOTYPE: $
3837 CODE:
3838 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3839 OUTPUT:
3840 RETVAL
3841
3842UV
3843rss (Coro::State coro)
3844 PROTOTYPE: $
3845 ALIAS:
3846 usecount = 1
3847 CODE:
3848 switch (ix)
3849 {
3850 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3851 case 1: RETVAL = coro->usecount; break;
3852 }
3853 OUTPUT:
3854 RETVAL
3855
3856void
3857force_cctx ()
3858 PROTOTYPE:
3859 CODE:
3860 cctx_current->idle_sp = 0;
3861
3862void
3863swap_defsv (Coro::State self)
3864 PROTOTYPE: $
3865 ALIAS:
3866 swap_defav = 1
3867 CODE:
3868 if (!self->slot)
3869 croak ("cannot swap state with coroutine that has no saved state,");
3870 else
3871 {
3872 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3873 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3874
3875 SV *tmp = *src; *src = *dst; *dst = tmp;
3876 }
3877
3878void
3879cancel (Coro::State self)
3880 CODE:
3881 coro_state_destroy (aTHX_ self);
3882
3883SV *
3884enable_times (int enabled = enable_times)
3885 CODE:
3886{
3887 RETVAL = boolSV (enable_times);
3888
3889 if (enabled != enable_times)
3890 {
3891 enable_times = enabled;
3892
3893 coro_times_update ();
3894 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3895 }
3896}
3897 OUTPUT:
3898 RETVAL
3899
3900void
3901times (Coro::State self)
3902 PPCODE:
3903{
3904 struct coro *current = SvSTATE (coro_current);
3905
3906 if (ecb_expect_false (current == self))
3907 {
3908 coro_times_update ();
3909 coro_times_add (SvSTATE (coro_current));
3910 }
3911
3912 EXTEND (SP, 2);
3913 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3914 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3915
3916 if (ecb_expect_false (current == self))
3917 coro_times_sub (SvSTATE (coro_current));
3918}
3919
3920void
3921swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3922 CODE:
3923{
3924 struct coro *current = SvSTATE_current;
3925
3926 if (current == coro)
3927 SWAP_SVS (current);
3928
3929 if (!coro->swap_sv)
3930 coro->swap_sv = newAV ();
3931
3932 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3933 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3934
3935 if (current == coro)
3936 SWAP_SVS (current);
3937}
3938
3939
1142MODULE = Coro::State PACKAGE = Coro 3940MODULE = Coro::State PACKAGE = Coro
1143 3941
1144BOOT: 3942BOOT:
1145{ 3943{
1146 int i; 3944 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3945 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3946 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3947 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3948 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3949 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3950 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3951 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1147 3952
3953 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3954 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3955 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3956 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3957
1148 coro_stash = gv_stashpv ("Coro", TRUE); 3958 coro_stash = gv_stashpv ("Coro", TRUE);
1149 3959
1150 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3960 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1151 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3961 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1152 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3962 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1153 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3963 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1154 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3964 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1155 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3965 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1156
1157 coro_current = get_sv ("Coro::current", FALSE);
1158 SvREADONLY_on (coro_current);
1159
1160 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161 coro_ready[i] = newAV ();
1162 3966
1163 { 3967 {
1164 SV *sv = perl_get_sv("Coro::API", 1); 3968 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1165 3969
1166 coroapi.schedule = api_schedule; 3970 coroapi.schedule = api_schedule;
3971 coroapi.schedule_to = api_schedule_to;
1167 coroapi.cede = api_cede; 3972 coroapi.cede = api_cede;
3973 coroapi.cede_notself = api_cede_notself;
1168 coroapi.ready = api_ready; 3974 coroapi.ready = api_ready;
1169 coroapi.is_ready = api_is_ready; 3975 coroapi.is_ready = api_is_ready;
1170 coroapi.nready = &coro_nready; 3976 coroapi.nready = coro_nready;
1171 coroapi.current = coro_current; 3977 coroapi.current = coro_current;
1172 3978
3979 coroapi.enterleave_hook = api_enterleave_hook;
3980 coroapi.enterleave_unhook = api_enterleave_unhook;
3981 coroapi.enterleave_scope_hook = api_enterleave_scope_hook;
3982
1173 GCoroAPI = &coroapi; 3983 /*GCoroAPI = &coroapi;*/
1174 sv_setiv (sv, (IV)&coroapi); 3984 sv_setiv (sv, (IV)&coroapi);
1175 SvREADONLY_on (sv); 3985 SvREADONLY_on (sv);
1176 } 3986 }
1177} 3987}
1178 3988
3989SV *
3990async (...)
3991 PROTOTYPE: &@
3992 CODE:
3993 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
3994 api_ready (aTHX_ RETVAL);
3995 OUTPUT:
3996 RETVAL
3997
3998void
3999_destroy (Coro::State coro)
4000 CODE:
4001 /* used by the manager thread */
4002 coro_state_destroy (aTHX_ coro);
4003
4004void
4005on_destroy (Coro::State coro, SV *cb)
4006 CODE:
4007 coro_push_on_destroy (aTHX_ coro, newSVsv (cb));
4008
4009void
4010join (...)
4011 CODE:
4012 CORO_EXECUTE_SLF_XS (slf_init_join);
4013
4014void
4015terminate (...)
4016 CODE:
4017 CORO_EXECUTE_SLF_XS (slf_init_terminate);
4018
4019void
4020cancel (...)
4021 CODE:
4022 CORO_EXECUTE_SLF_XS (slf_init_cancel);
4023
4024int
4025safe_cancel (Coro::State self, ...)
4026 C_ARGS: aTHX_ self, &ST (1), items - 1
4027
4028void
4029schedule (...)
4030 CODE:
4031 CORO_EXECUTE_SLF_XS (slf_init_schedule);
4032
4033void
4034schedule_to (...)
4035 CODE:
4036 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
4037
4038void
4039cede_to (...)
4040 CODE:
4041 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
4042
4043void
4044cede (...)
4045 CODE:
4046 CORO_EXECUTE_SLF_XS (slf_init_cede);
4047
4048void
4049cede_notself (...)
4050 CODE:
4051 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
4052
4053void
4054_set_current (SV *current)
4055 PROTOTYPE: $
4056 CODE:
4057 SvREFCNT_dec_NN (SvRV (coro_current));
4058 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
4059
4060void
4061_set_readyhook (SV *hook)
4062 PROTOTYPE: $
4063 CODE:
4064 SvREFCNT_dec (coro_readyhook);
4065 SvGETMAGIC (hook);
4066 if (SvOK (hook))
4067 {
4068 coro_readyhook = newSVsv (hook);
4069 CORO_READYHOOK = invoke_sv_ready_hook_helper;
4070 }
4071 else
4072 {
4073 coro_readyhook = 0;
4074 CORO_READYHOOK = 0;
4075 }
4076
1179int 4077int
1180prio (Coro::State coro, int newprio = 0) 4078prio (Coro::State coro, int newprio = 0)
4079 PROTOTYPE: $;$
1181 ALIAS: 4080 ALIAS:
1182 nice = 1 4081 nice = 1
1183 CODE: 4082 CODE:
1184{ 4083{
1185 RETVAL = coro->prio; 4084 RETVAL = coro->prio;
1186 4085
1187 if (items > 1) 4086 if (items > 1)
1188 { 4087 {
1189 if (ix) 4088 if (ix)
1190 newprio += coro->prio; 4089 newprio = coro->prio - newprio;
1191 4090
1192 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 4091 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1193 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 4092 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1194 4093
1195 coro->prio = newprio; 4094 coro->prio = newprio;
1196 } 4095 }
1197} 4096}
4097 OUTPUT:
4098 RETVAL
1198 4099
1199SV * 4100SV *
1200ready (SV *self) 4101ready (SV *self)
1201 PROTOTYPE: $ 4102 PROTOTYPE: $
1202 CODE: 4103 CODE:
1203 RETVAL = boolSV (api_ready (self)); 4104 RETVAL = boolSV (api_ready (aTHX_ self));
1204 OUTPUT:
1205 RETVAL
1206
1207SV *
1208is_ready (SV *self)
1209 PROTOTYPE: $
1210 CODE:
1211 RETVAL = boolSV (api_is_ready (self));
1212 OUTPUT: 4105 OUTPUT:
1213 RETVAL 4106 RETVAL
1214 4107
1215int 4108int
1216nready (...) 4109nready (...)
… …
1219 RETVAL = coro_nready; 4112 RETVAL = coro_nready;
1220 OUTPUT: 4113 OUTPUT:
1221 RETVAL 4114 RETVAL
1222 4115
1223void 4116void
1224_set_current (SV *current) 4117suspend (Coro::State self)
1225 PROTOTYPE: $ 4118 PROTOTYPE: $
1226 CODE: 4119 CODE:
1227 SvREFCNT_dec (SvRV (coro_current)); 4120 self->flags |= CF_SUSPENDED;
1228 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229 4121
1230MODULE = Coro::State PACKAGE = Coro::AIO 4122void
4123resume (Coro::State self)
4124 PROTOTYPE: $
4125 CODE:
4126 self->flags &= ~CF_SUSPENDED;
4127
4128void
4129_pool_handler (...)
4130 CODE:
4131 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
4132
4133void
4134async_pool (SV *cv, ...)
4135 PROTOTYPE: &@
4136 PPCODE:
4137{
4138 HV *hv = (HV *)av_pop (av_async_pool);
4139 AV *av = newAV ();
4140 SV *cb = ST (0);
4141 int i;
4142
4143 av_extend (av, items - 2);
4144 for (i = 1; i < items; ++i)
4145 av_push (av, SvREFCNT_inc_NN (ST (i)));
4146
4147 if ((SV *)hv == &PL_sv_undef)
4148 {
4149 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
4150 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
4151 SvREFCNT_dec_NN (sv);
4152 }
4153
4154 {
4155 struct coro *coro = SvSTATE_hv (hv);
4156
4157 assert (!coro->invoke_cb);
4158 assert (!coro->invoke_av);
4159 coro->invoke_cb = SvREFCNT_inc (cb);
4160 coro->invoke_av = av;
4161 }
4162
4163 api_ready (aTHX_ (SV *)hv);
4164
4165 if (GIMME_V != G_VOID)
4166 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
4167 else
4168 SvREFCNT_dec_NN (hv);
4169}
1231 4170
1232SV * 4171SV *
1233_get_state () 4172rouse_cb ()
4173 PROTOTYPE:
1234 CODE: 4174 CODE:
1235{ 4175 RETVAL = coro_new_rouse_cb (aTHX);
1236 struct {
1237 int errorno;
1238 int laststype;
1239 int laststatval;
1240 Stat_t statcache;
1241 } data;
1242
1243 data.errorno = errno;
1244 data.laststype = PL_laststype;
1245 data.laststatval = PL_laststatval;
1246 data.statcache = PL_statcache;
1247
1248 RETVAL = newSVpvn ((char *)&data, sizeof data);
1249}
1250 OUTPUT: 4176 OUTPUT:
1251 RETVAL 4177 RETVAL
1252 4178
1253void 4179void
1254_set_state (char *data_) 4180rouse_wait (...)
4181 PROTOTYPE: ;$
4182 PPCODE:
4183 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
4184
4185void
4186on_enter (SV *block)
4187 ALIAS:
4188 on_leave = 1
1255 PROTOTYPE: $ 4189 PROTOTYPE: &
1256 CODE: 4190 CODE:
1257{ 4191{
1258 struct { 4192 struct coro *coro = SvSTATE_current;
4193 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
4194
4195 block = s_get_cv_croak (block);
4196
4197 if (!*avp)
4198 *avp = newAV ();
4199
4200 av_push (*avp, SvREFCNT_inc (block));
4201
4202 if (!ix)
4203 on_enterleave_call (aTHX_ block);
4204
4205 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4206 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
4207 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
4208}
4209
4210
4211MODULE = Coro::State PACKAGE = PerlIO::cede
4212
4213BOOT:
4214 PerlIO_define_layer (aTHX_ &PerlIO_cede);
4215
4216
4217MODULE = Coro::State PACKAGE = Coro::Semaphore
4218
4219SV *
4220new (SV *klass, SV *count = 0)
4221 CODE:
4222{
4223 int semcnt = 1;
4224
4225 if (count)
4226 {
4227 SvGETMAGIC (count);
4228
4229 if (SvOK (count))
4230 semcnt = SvIV (count);
4231 }
4232
4233 RETVAL = sv_bless (
4234 coro_waitarray_new (aTHX_ semcnt),
4235 GvSTASH (CvGV (cv))
4236 );
4237}
4238 OUTPUT:
4239 RETVAL
4240
4241# helper for Coro::Channel and others
4242SV *
4243_alloc (int count)
4244 CODE:
4245 RETVAL = coro_waitarray_new (aTHX_ count);
4246 OUTPUT:
4247 RETVAL
4248
4249SV *
4250count (SV *self)
4251 CODE:
4252 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
4253 OUTPUT:
4254 RETVAL
4255
4256void
4257up (SV *self, int adjust = 1)
4258 ALIAS:
4259 adjust = 1
4260 CODE:
4261 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
4262
4263void
4264down (...)
4265 CODE:
4266 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
4267
4268void
4269wait (...)
4270 CODE:
4271 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
4272
4273void
4274try (SV *self)
4275 PPCODE:
4276{
4277 AV *av = (AV *)SvRV (self);
4278 SV *count_sv = AvARRAY (av)[0];
4279 IV count = SvIVX (count_sv);
4280
4281 if (count > 0)
4282 {
4283 --count;
4284 SvIVX (count_sv) = count;
4285 XSRETURN_YES;
4286 }
4287 else
4288 XSRETURN_NO;
4289}
4290
4291void
4292waiters (SV *self)
4293 PPCODE:
4294{
4295 AV *av = (AV *)SvRV (self);
4296 int wcount = AvFILLp (av) + 1 - 1;
4297
4298 if (GIMME_V == G_SCALAR)
4299 XPUSHs (sv_2mortal (newSViv (wcount)));
4300 else
4301 {
1259 int errorno; 4302 int i;
1260 int laststype; 4303 EXTEND (SP, wcount);
1261 int laststatval; 4304 for (i = 1; i <= wcount; ++i)
1262 Stat_t statcache; 4305 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1263 } *data = (void *)data_; 4306 }
1264
1265 errno = data->errorno;
1266 PL_laststype = data->laststype;
1267 PL_laststatval = data->laststatval;
1268 PL_statcache = data->statcache;
1269} 4307}
4308
4309MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
4310
4311void
4312_may_delete (SV *sem, int count, unsigned int extra_refs)
4313 PPCODE:
4314{
4315 AV *av = (AV *)SvRV (sem);
4316
4317 if (SvREFCNT ((SV *)av) == 1 + extra_refs
4318 && AvFILLp (av) == 0 /* no waiters, just count */
4319 && SvIV (AvARRAY (av)[0]) == count)
4320 XSRETURN_YES;
4321
4322 XSRETURN_NO;
4323}
4324
4325MODULE = Coro::State PACKAGE = Coro::Signal
4326
4327SV *
4328new (SV *klass)
4329 CODE:
4330 RETVAL = sv_bless (
4331 coro_waitarray_new (aTHX_ 0),
4332 GvSTASH (CvGV (cv))
4333 );
4334 OUTPUT:
4335 RETVAL
4336
4337void
4338wait (...)
4339 CODE:
4340 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
4341
4342void
4343broadcast (SV *self)
4344 CODE:
4345{
4346 AV *av = (AV *)SvRV (self);
4347 coro_signal_wake (aTHX_ av, AvFILLp (av));
4348}
4349
4350void
4351send (SV *self)
4352 CODE:
4353{
4354 AV *av = (AV *)SvRV (self);
4355
4356 if (AvFILLp (av))
4357 coro_signal_wake (aTHX_ av, 1);
4358 else
4359 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
4360}
4361
4362IV
4363awaited (SV *self)
4364 CODE:
4365 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
4366 OUTPUT:
4367 RETVAL
4368
4369
4370MODULE = Coro::State PACKAGE = Coro::AnyEvent
4371
4372BOOT:
4373 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
4374
4375void
4376_schedule (...)
4377 CODE:
4378{
4379 static int incede;
4380
4381 api_cede_notself (aTHX);
4382
4383 ++incede;
4384 while (coro_nready >= incede && api_cede (aTHX))
4385 ;
4386
4387 sv_setsv (sv_activity, &PL_sv_undef);
4388 if (coro_nready >= incede)
4389 {
4390 PUSHMARK (SP);
4391 PUTBACK;
4392 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
4393 }
4394
4395 --incede;
4396}
4397
4398
4399MODULE = Coro::State PACKAGE = Coro::AIO
4400
4401void
4402_register (char *target, char *proto, SV *req)
4403 CODE:
4404{
4405 SV *req_cv = s_get_cv_croak (req);
4406 /* newXSproto doesn't return the CV on 5.8 */
4407 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
4408 sv_setpv ((SV *)slf_cv, proto);
4409 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
4410}
4411
4412MODULE = Coro::State PACKAGE = Coro::Select
4413
4414void
4415patch_pp_sselect ()
4416 CODE:
4417 if (!coro_old_pp_sselect)
4418 {
4419 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4420 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4421 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4422 }
4423
4424void
4425unpatch_pp_sselect ()
4426 CODE:
4427 if (coro_old_pp_sselect)
4428 {
4429 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4430 coro_old_pp_sselect = 0;
4431 }
4432
4433MODULE = Coro::State PACKAGE = Coro::Util
4434
4435void
4436_exit (int code)
4437 CODE:
4438 _exit (code);
4439
4440NV
4441time ()
4442 CODE:
4443 RETVAL = nvtime (aTHX);
4444 OUTPUT:
4445 RETVAL
4446
4447NV
4448gettimeofday ()
4449 PPCODE:
4450{
4451 UV tv [2];
4452 u2time (aTHX_ tv);
4453 EXTEND (SP, 2);
4454 PUSHs (sv_2mortal (newSVuv (tv [0])));
4455 PUSHs (sv_2mortal (newSVuv (tv [1])));
4456}
4457

Diff Legend

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