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 1.126 by root, Tue Dec 12 04:19:56 2006 UTC vs.
Revision 1.315 by root, Thu Nov 20 05:25:17 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
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/* 5.8.7 */
44#ifndef SvRV_set
45# define SvRV_set(s,v) SvRV(s) = (v)
46#endif
47 12
48#include <stdio.h> 13#include <stdio.h>
49#include <errno.h> 14#include <errno.h>
50#include <assert.h> 15#include <assert.h>
51 16
52#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
53# undef STACKGUARD 18# undef setjmp
54#endif 19# undef longjmp
55 20# undef _exit
56#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
57# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
58#endif 24#endif
59 25
60#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
61# include <unistd.h> 27# include <unistd.h>
62# include <sys/mman.h> 28# include <sys/mman.h>
… …
78#else 44#else
79# define PAGESIZE 0 45# define PAGESIZE 0
80# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
81#endif 47#endif
82 48
83/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
84 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
85 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
111
112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
113# undef CORO_STACKGUARD
114#endif
115
116#ifndef CORO_STACKGUARD
117# define CORO_STACKGUARD 0
118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
86#define dSTACKLEVEL int stacklevel 128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
87#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
88 134
89#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
90 136
91#if __GNUC__ >= 3 137#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
93#else 141#else
94# define attribute(x) 142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
95#endif 145#endif
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
96 149
97#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
98 151
99#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
100 154
101#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
102static perl_mutex coro_mutex; 156# if CORO_PTHREAD
103# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
104# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
105#else
106# define LOCK (void)0
107# define UNLOCK (void)0
108#endif 158# endif
159#endif
109 160
110struct io_state 161static double (*nvtime)(); /* so why doesn't it take void? */
111{
112 int errorno;
113 I32 laststype;
114 int laststatval;
115 Stat_t statcache;
116};
117 162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
118static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
119static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
120static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
121static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_state_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
122 192
123static struct coro_cctx *cctx_first; 193static struct coro_cctx *cctx_first;
124static int cctx_count, cctx_idle; 194static int cctx_count, cctx_idle;
125 195
196enum {
197 CC_MAPPED = 0x01,
198 CC_NOREUSE = 0x02, /* throw this away after tracing */
199 CC_TRACE = 0x04,
200 CC_TRACE_SUB = 0x08, /* trace sub calls */
201 CC_TRACE_LINE = 0x10, /* trace each statement */
202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
203};
204
126/* this is a structure representing a c-level coroutine */ 205/* this is a structure representing a c-level coroutine */
127typedef struct coro_cctx { 206typedef struct coro_cctx
207{
128 struct coro_cctx *next; 208 struct coro_cctx *next;
129 209
130 /* the stack */ 210 /* the stack */
131 void *sptr; 211 void *sptr;
132 long ssize; /* positive == mmap, otherwise malloc */ 212 size_t ssize;
133 213
134 /* cpu state */ 214 /* cpu state */
135 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 215 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
136 JMPENV *top_env; 217 JMPENV *top_env;
137 coro_context cctx; 218 coro_context cctx;
138 219
139 int inuse; 220 U32 gen;
140
141#if USE_VALGRIND 221#if CORO_USE_VALGRIND
142 int valgrind_id; 222 int valgrind_id;
143#endif 223#endif
224 unsigned char flags;
144} coro_cctx; 225} coro_cctx;
145 226
146enum { 227enum {
147 CF_RUNNING = 0x0001, /* coroutine is running */ 228 CF_RUNNING = 0x0001, /* coroutine is running */
148 CF_READY = 0x0002, /* coroutine is ready */ 229 CF_READY = 0x0002, /* coroutine is ready */
149 CF_NEW = 0x0004, /* ahs never been switched to */ 230 CF_NEW = 0x0004, /* has never been switched to */
231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
150}; 232};
151 233
152/* this is a structure representing a perl-level coroutine */ 234/* the structure where most of the perl state is stored, overlaid on the cxstack */
153struct coro { 235typedef struct
154 /* the c coroutine allocated to this perl coroutine, if any */ 236{
155 coro_cctx *cctx; 237 SV *defsv;
156 238 AV *defav;
157 /* data associated with this coroutine (initial args) */ 239 SV *errsv;
158 AV *args; 240 SV *irsgv;
159 int refcnt;
160 int save; /* CORO_SAVE flags */
161 int flags; /* CF_ flags */
162
163 /* optionally saved, might be zero */
164 AV *defav; /* @_ */
165 SV *defsv; /* $_ */
166 SV *errsv; /* $@ */
167 SV *irssv; /* $/ */
168 SV *irssv_sv; /* real $/ cache */
169
170#define VAR(name,type) type name; 241#define VAR(name,type) type name;
171# include "state.h" 242# include "state.h"
172#undef VAR 243#undef VAR
244} perl_slots;
245
246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
247
248/* this is a structure representing a perl-level coroutine */
249struct coro {
250 /* the C coroutine allocated to this perl coroutine, if any */
251 coro_cctx *cctx;
252
253 /* state data */
254 struct CoroSLF slf_frame; /* saved slf frame */
255 AV *mainstack;
256 perl_slots *slot; /* basically the saved sp */
257
258 CV *startcv; /* the CV to execute */
259 AV *args; /* data associated with this coroutine (initial args) */
260 int refcnt; /* coroutines are refcounted, yes */
261 int flags; /* CF_ flags */
262 HV *hv; /* the perl hash associated with this coro, if any */
263 void (*on_destroy)(pTHX_ struct coro *coro);
264
265 /* statistics */
266 int usecount; /* number of transfers to this coro */
173 267
174 /* coro process data */ 268 /* coro process data */
175 int prio; 269 int prio;
270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
272
273 /* async_pool */
274 SV *saved_deffh;
275 SV *invoke_cb;
276 AV *invoke_av;
277
278 /* linked list */
279 struct coro *next, *prev;
176}; 280};
177 281
178typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
179typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
180 284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
289
290/** Coro ********************************************************************/
291
292#define PRIO_MAX 3
293#define PRIO_HIGH 1
294#define PRIO_NORMAL 0
295#define PRIO_LOW -1
296#define PRIO_IDLE -3
297#define PRIO_MIN -4
298
299/* for Coro.pm */
300static SV *coro_current;
301static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
181static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
347
348static AV *
182coro_clone_padlist (CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
183{ 350{
184 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
185 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
186 353
187 newpadlist = newAV (); 354 newpadlist = newAV ();
188 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
189#if PERL_VERSION_ATLEAST (5,9,0) 356#if PERL_VERSION_ATLEAST (5,10,0)
190 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
191#else 358#else
192 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
193#endif 360#endif
194 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
195 --AvFILLp (padlist); 362 --AvFILLp (padlist);
196 363
197 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
198 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
199 366
200 return newpadlist; 367 return newpadlist;
201} 368}
202 369
203static void 370static void
204free_padlist (AV *padlist) 371free_padlist (pTHX_ AV *padlist)
205{ 372{
206 /* may be during global destruction */ 373 /* may be during global destruction */
207 if (SvREFCNT (padlist)) 374 if (SvREFCNT (padlist))
208 { 375 {
209 I32 i = AvFILLp (padlist); 376 I32 i = AvFILLp (padlist);
… …
230 AV *padlist; 397 AV *padlist;
231 AV *av = (AV *)mg->mg_obj; 398 AV *av = (AV *)mg->mg_obj;
232 399
233 /* casting is fun. */ 400 /* casting is fun. */
234 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235 free_padlist (padlist); 402 free_padlist (aTHX_ padlist);
236 403
237 SvREFCNT_dec (av); 404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
238 405
239 return 0; 406 return 0;
240} 407}
241 408
409#define CORO_MAGIC_type_cv 26
242#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
243 411
244static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 412static MGVTBL coro_cv_vtbl = {
413 0, 0, 0, 0,
414 coro_cv_free
415};
245 416
246#define CORO_MAGIC(cv) \ 417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
247 SvMAGIC (cv) \ 419 ? SvMAGIC (sv) \
248 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 420 : mg_find (sv, type))
249 ? SvMAGIC (cv) \ 421
250 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 422#define CORO_MAGIC(sv, type) \
423 (expect_true (SvMAGIC (sv)) \
424 ? CORO_MAGIC_NN (sv, type) \
251 : 0 425 : 0)
426
427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
429
430INLINE struct coro *
431SvSTATE_ (pTHX_ SV *coro)
432{
433 HV *stash;
434 MAGIC *mg;
435
436 if (SvROK (coro))
437 coro = SvRV (coro);
438
439 if (expect_false (SvTYPE (coro) != SVt_PVHV))
440 croak ("Coro::State object required");
441
442 stash = SvSTASH (coro);
443 if (expect_false (stash != coro_stash && stash != coro_state_stash))
444 {
445 /* very slow, but rare, check */
446 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
447 croak ("Coro::State object required");
448 }
449
450 mg = CORO_MAGIC_state (coro);
451 return (struct coro *)mg->mg_ptr;
452}
453
454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
252 459
253/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
254static void 461static void
255get_padlist (CV *cv) 462get_padlist (pTHX_ CV *cv)
256{ 463{
257 MAGIC *mg = CORO_MAGIC (cv); 464 MAGIC *mg = CORO_MAGIC_cv (cv);
258 AV *av; 465 AV *av;
259 466
260 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
261 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
262 else 469 else
263 { 470 {
264#if 0 471#if CORO_PREFER_PERL_FUNCTIONS
265 /* this is probably cleaner, but also slower? */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
266 CV *cp = Perl_cv_clone (cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
267 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
268 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
269 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
270#else 478#else
271 CvPADLIST (cv) = coro_clone_padlist (cv); 479 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
272#endif 480#endif
273 } 481 }
274} 482}
275 483
276static void 484static void
277put_padlist (CV *cv) 485put_padlist (pTHX_ CV *cv)
278{ 486{
279 MAGIC *mg = CORO_MAGIC (cv); 487 MAGIC *mg = CORO_MAGIC_cv (cv);
280 AV *av; 488 AV *av;
281 489
282 if (!mg) 490 if (expect_false (!mg))
283 { 491 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
284 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
285 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286 mg->mg_virtual = &vtbl_coro;
287 mg->mg_obj = (SV *)newAV ();
288 }
289 492
290 av = (AV *)mg->mg_obj; 493 av = (AV *)mg->mg_obj;
291 494
292 if (AvFILLp (av) >= AvMAX (av)) 495 if (expect_false (AvFILLp (av) >= AvMAX (av)))
293 av_extend (av, AvMAX (av) + 1); 496 av_extend (av, AvMAX (av) + 1);
294 497
295 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 498 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
296} 499}
297 500
298#define SB do { 501/** load & save, init *******************************************************/
299#define SE } while (0)
300 502
301#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
302
303static void 503static void
304load_perl (Coro__State c) 504load_perl (pTHX_ Coro__State c)
305{ 505{
506 perl_slots *slot = c->slot;
507 c->slot = 0;
508
509 PL_mainstack = c->mainstack;
510
511 GvSV (PL_defgv) = slot->defsv;
512 GvAV (PL_defgv) = slot->defav;
513 GvSV (PL_errgv) = slot->errsv;
514 GvSV (irsgv) = slot->irsgv;
515
306#define VAR(name,type) PL_ ## name = c->name; 516 #define VAR(name,type) PL_ ## name = slot->name;
307# include "state.h" 517 # include "state.h"
308#undef VAR 518 #undef VAR
309
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
313 if (c->irssv)
314 {
315 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
316 SvREFCNT_dec (c->irssv);
317 else
318 {
319 REPLACE_SV (PL_rs, c->irssv);
320 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
321 sv_setsv (c->irssv_sv, PL_rs);
322 }
323 }
324 519
325 { 520 {
326 dSP; 521 dSP;
522
327 CV *cv; 523 CV *cv;
328 524
329 /* now do the ugly restore mess */ 525 /* now do the ugly restore mess */
330 while ((cv = (CV *)POPs)) 526 while (expect_true (cv = (CV *)POPs))
331 { 527 {
332 put_padlist (cv); /* mark this padlist as available */ 528 put_padlist (aTHX_ cv); /* mark this padlist as available */
333 CvDEPTH (cv) = PTR2IV (POPs); 529 CvDEPTH (cv) = PTR2IV (POPs);
334 CvPADLIST (cv) = (AV *)POPs; 530 CvPADLIST (cv) = (AV *)POPs;
335 } 531 }
336 532
337 PUTBACK; 533 PUTBACK;
338 } 534 }
339}
340 535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
538}
539
341static void 540static void
342save_perl (Coro__State c) 541save_perl (pTHX_ Coro__State c)
343{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
344 { 546 {
345 dSP; 547 dSP;
346 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
347 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
348 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
350 /* 552 /*
351 * the worst thing you can imagine happens first - we have to save 553 * the worst thing you can imagine happens first - we have to save
352 * (and reinitialize) all cv's in the whole callchain :( 554 * (and reinitialize) all cv's in the whole callchain :(
353 */ 555 */
354 556
355 EXTEND (SP, 3 + 1);
356 PUSHs (Nullsv); 557 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 558 /* this loop was inspired by pp_caller */
358 for (;;) 559 for (;;)
359 { 560 {
360 while (cxix >= 0) 561 while (expect_true (cxix >= 0))
361 { 562 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 563 PERL_CONTEXT *cx = &ccstk[cxix--];
363 564
364 if (CxTYPE (cx) == CXt_SUB) 565 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
365 { 566 {
366 CV *cv = cx->blk_sub.cv; 567 CV *cv = cx->blk_sub.cv;
367 568
368 if (CvDEPTH (cv)) 569 if (expect_true (CvDEPTH (cv)))
369 { 570 {
370 EXTEND (SP, 3); 571 EXTEND (SP, 3);
371 PUSHs ((SV *)CvPADLIST (cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
372 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
374 575
375 CvDEPTH (cv) = 0; 576 CvDEPTH (cv) = 0;
376 get_padlist (cv); 577 get_padlist (aTHX_ cv);
377 } 578 }
378 } 579 }
379 } 580 }
380 581
381 if (top_si->si_type == PERLSI_MAIN) 582 if (expect_true (top_si->si_type == PERLSI_MAIN))
382 break; 583 break;
383 584
384 top_si = top_si->si_prev; 585 top_si = top_si->si_prev;
385 ccstk = top_si->si_cxstack; 586 ccstk = top_si->si_cxstack;
386 cxix = top_si->si_cxix; 587 cxix = top_si->si_cxix;
387 } 588 }
388 589
389 PUTBACK; 590 PUTBACK;
390 } 591 }
391 592
392 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 593 /* allocate some space on the context stack for our purposes */
393 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 594 /* we manually unroll here, as usually 2 slots is enough */
394 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 595 if (SLOT_COUNT >= 1) CXINC;
395 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 596 if (SLOT_COUNT >= 2) CXINC;
597 if (SLOT_COUNT >= 3) CXINC;
598 {
599 int i;
600 for (i = 3; i < SLOT_COUNT; ++i)
601 CXINC;
602 }
603 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 604
605 c->mainstack = PL_mainstack;
606
607 {
608 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
609
610 slot->defav = GvAV (PL_defgv);
611 slot->defsv = DEFSV;
612 slot->errsv = ERRSV;
613 slot->irsgv = GvSV (irsgv);
614
397#define VAR(name,type)c->name = PL_ ## name; 615 #define VAR(name,type) slot->name = PL_ ## name;
398# include "state.h" 616 # include "state.h"
399#undef VAR 617 #undef VAR
618 }
400} 619}
401 620
402/* 621/*
403 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
404 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
405 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
406 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
407 */ 626 */
408#if USE_PERL_INIT_STACKS 627#if CORO_PREFER_PERL_FUNCTIONS
409# define coro_init_stacks init_stacks 628# define coro_init_stacks(thx) init_stacks ()
410#else 629#else
411
412static void 630static void
413coro_init_stacks () 631coro_init_stacks (pTHX)
414{ 632{
415 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 633 PL_curstackinfo = new_stackinfo(32, 8);
416 PL_curstackinfo->si_type = PERLSI_MAIN; 634 PL_curstackinfo->si_type = PERLSI_MAIN;
417 PL_curstack = PL_curstackinfo->si_stack; 635 PL_curstack = PL_curstackinfo->si_stack;
418 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 636 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
419 637
420 PL_stack_base = AvARRAY(PL_curstack); 638 PL_stack_base = AvARRAY(PL_curstack);
421 PL_stack_sp = PL_stack_base; 639 PL_stack_sp = PL_stack_base;
422 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 640 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
423 641
424 New(50,PL_tmps_stack,128,SV*); 642 New(50,PL_tmps_stack,32,SV*);
425 PL_tmps_floor = -1; 643 PL_tmps_floor = -1;
426 PL_tmps_ix = -1; 644 PL_tmps_ix = -1;
427 PL_tmps_max = 128; 645 PL_tmps_max = 32;
428 646
429 New(54,PL_markstack,32,I32); 647 New(54,PL_markstack,16,I32);
430 PL_markstack_ptr = PL_markstack; 648 PL_markstack_ptr = PL_markstack;
431 PL_markstack_max = PL_markstack + 32; 649 PL_markstack_max = PL_markstack + 16;
432 650
433#ifdef SET_MARK_OFFSET 651#ifdef SET_MARK_OFFSET
434 SET_MARK_OFFSET; 652 SET_MARK_OFFSET;
435#endif 653#endif
436 654
437 New(54,PL_scopestack,32,I32); 655 New(54,PL_scopestack,8,I32);
438 PL_scopestack_ix = 0; 656 PL_scopestack_ix = 0;
439 PL_scopestack_max = 32; 657 PL_scopestack_max = 8;
440 658
441 New(54,PL_savestack,64,ANY); 659 New(54,PL_savestack,24,ANY);
442 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
443 PL_savestack_max = 64; 661 PL_savestack_max = 24;
444 662
445#if !PERL_VERSION_ATLEAST (5,9,0) 663#if !PERL_VERSION_ATLEAST (5,10,0)
446 New(54,PL_retstack,16,OP*); 664 New(54,PL_retstack,4,OP*);
447 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
448 PL_retstack_max = 16; 666 PL_retstack_max = 4;
449#endif 667#endif
450} 668}
669#endif
451 670
452/* 671/*
453 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
454 */ 673 */
455static void 674static void
456coro_destroy_stacks () 675coro_destruct_stacks (pTHX)
457{ 676{
458 if (!IN_DESTRUCT)
459 {
460 /* restore all saved variables and stuff */
461 LEAVE_SCOPE (0);
462 assert (PL_tmps_floor == -1);
463
464 /* free all temporaries */
465 FREETMPS;
466 assert (PL_tmps_ix == -1);
467
468 POPSTACK_TO (PL_mainstack);
469 }
470
471 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
472 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
473 679
474 while (PL_curstackinfo) 680 while (PL_curstackinfo)
475 { 681 {
… …
485 691
486 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
487 Safefree (PL_markstack); 693 Safefree (PL_markstack);
488 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
489 Safefree (PL_savestack); 695 Safefree (PL_savestack);
490#if !PERL_VERSION_ATLEAST (5,9,0) 696#if !PERL_VERSION_ATLEAST (5,10,0)
491 Safefree (PL_retstack); 697 Safefree (PL_retstack);
492#endif 698#endif
493} 699}
494#endif
495 700
701#define CORO_RSS \
702 rss += sizeof (SYM (curstackinfo)); \
703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
709
710static size_t
711coro_rss (pTHX_ struct coro *coro)
712{
713 size_t rss = sizeof (*coro);
714
715 if (coro->mainstack)
716 {
717 if (coro->flags & CF_RUNNING)
718 {
719 #define SYM(sym) PL_ ## sym
720 CORO_RSS;
721 #undef SYM
722 }
723 else
724 {
725 #define SYM(sym) coro->slot->sym
726 CORO_RSS;
727 #undef SYM
728 }
729 }
730
731 return rss;
732}
733
734/** coroutine stack handling ************************************************/
735
736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
746
747/*
748 * This overrides the default magic get method of %SIG elements.
749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
750 * and instead of tryign to save and restore the hash elements, we just provide
751 * readback here.
752 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
753 * not expecting this to actually change the hook. This is a potential problem
754 * when a schedule happens then, but we ignore this.
755 */
496static void 756static int
497setup_coro (struct coro *coro) 757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
758{
759 const char *s = MgPV_nolen_const (mg);
760
761 if (*s == '_')
762 {
763 SV **svp = 0;
764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
769 {
770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
771 return 0;
772 }
773 }
774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
784 {
785 SV **svp = 0;
786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
824}
825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
842coro_setup (pTHX_ struct coro *coro)
498{ 843{
499 /* 844 /*
500 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
501 */ 846 */
502
503 coro_init_stacks (); 847 coro_init_stacks (aTHX);
504 848
849 PL_runops = RUNOPS_DEFAULT;
505 PL_curcop = &PL_compiling; 850 PL_curcop = &PL_compiling;
506 PL_in_eval = EVAL_NULL; 851 PL_in_eval = EVAL_NULL;
852 PL_comppad = 0;
507 PL_curpm = 0; 853 PL_curpm = 0;
854 PL_curpad = 0;
508 PL_localizing = 0; 855 PL_localizing = 0;
509 PL_dirty = 0; 856 PL_dirty = 0;
510 PL_restartop = 0; 857 PL_restartop = 0;
858#if PERL_VERSION_ATLEAST (5,10,0)
859 PL_parser = 0;
860#endif
861
862 /* recreate the die/warn hooks */
863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
865
866 GvSV (PL_defgv) = newSV (0);
867 GvAV (PL_defgv) = coro->args; coro->args = 0;
868 GvSV (PL_errgv) = newSV (0);
869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
870 PL_rs = newSVsv (GvSV (irsgv));
871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
511 872
512 { 873 {
513 dSP; 874 dSP;
514 LOGOP myop; 875 UNOP myop;
515 876
516 SvREFCNT_dec (GvAV (PL_defgv));
517 GvAV (PL_defgv) = coro->args; coro->args = 0;
518
519 Zero (&myop, 1, LOGOP); 877 Zero (&myop, 1, UNOP);
520 myop.op_next = Nullop; 878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
521 myop.op_flags = OPf_WANT_VOID; 880 myop.op_flags = OPf_WANT_VOID;
522 881
523 PUSHMARK (SP); 882 PUSHMARK (SP);
524 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 883 PUSHs ((SV *)coro->startcv);
525 PUTBACK; 884 PUTBACK;
526 PL_op = (OP *)&myop; 885 PL_op = (OP *)&myop;
527 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
528 SPAGAIN;
529 } 887 }
530 888
531 ENTER; /* necessary e.g. for dounwind */ 889 /* this newly created coroutine might be run on an existing cctx which most
532} 890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
891 */
892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
533 894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
534static void 907static void
908coro_destruct (pTHX_ struct coro *coro)
909{
910 if (!IN_DESTRUCT)
911 {
912 /* restore all saved variables and stuff */
913 LEAVE_SCOPE (0);
914 assert (PL_tmps_floor == -1);
915
916 /* free all temporaries */
917 FREETMPS;
918 assert (PL_tmps_ix == -1);
919
920 /* unwind all extra stacks */
921 POPSTACK_TO (PL_mainstack);
922
923 /* unwind main stack */
924 dounwind (-1);
925 }
926
927 SvREFCNT_dec (GvSV (PL_defgv));
928 SvREFCNT_dec (GvAV (PL_defgv));
929 SvREFCNT_dec (GvSV (PL_errgv));
930 SvREFCNT_dec (PL_defoutgv);
931 SvREFCNT_dec (PL_rs);
932 SvREFCNT_dec (GvSV (irsgv));
933
934 SvREFCNT_dec (PL_diehook);
935 SvREFCNT_dec (PL_warnhook);
936
937 SvREFCNT_dec (coro->saved_deffh);
938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
941
942 coro_destruct_stacks (aTHX);
943}
944
945INLINE void
535free_coro_mortal () 946free_coro_mortal (pTHX)
536{ 947{
537 if (coro_mortal) 948 if (expect_true (coro_mortal))
538 { 949 {
539 SvREFCNT_dec (coro_mortal); 950 SvREFCNT_dec (coro_mortal);
540 coro_mortal = 0; 951 coro_mortal = 0;
541 } 952 }
542} 953}
543 954
544/* inject a fake call to Coro::State::_cctx_init into the execution */ 955static int
956runops_trace (pTHX)
957{
958 COP *oldcop = 0;
959 int oldcxix = -2;
960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
961 coro_cctx *cctx = coro->cctx;
962
963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
964 {
965 PERL_ASYNC_CHECK ();
966
967 if (cctx->flags & CC_TRACE_ALL)
968 {
969 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972 SV **bot, **top;
973 AV *av = newAV (); /* return values */
974 SV **cb;
975 dSP;
976
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 bot = PL_stack_base + cx->blk_oldsp + 1;
983 top = cx->blk_gimme == G_ARRAY ? SP + 1
984 : cx->blk_gimme == G_SCALAR ? bot + 1
985 : bot;
986
987 av_extend (av, top - bot);
988 while (bot < top)
989 av_push (av, SvREFCNT_inc_NN (*bot++));
990
991 PL_runops = RUNOPS_DEFAULT;
992 ENTER;
993 SAVETMPS;
994 EXTEND (SP, 3);
995 PUSHMARK (SP);
996 PUSHs (&PL_sv_no);
997 PUSHs (fullname);
998 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
999 PUTBACK;
1000 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1001 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1002 SPAGAIN;
1003 FREETMPS;
1004 LEAVE;
1005 PL_runops = runops_trace;
1006 }
1007
1008 if (oldcop != PL_curcop)
1009 {
1010 oldcop = PL_curcop;
1011
1012 if (PL_curcop != &PL_compiling)
1013 {
1014 SV **cb;
1015
1016 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1017 {
1018 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1019
1020 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1021 {
1022 runops_proc_t old_runops = PL_runops;
1023 dSP;
1024 GV *gv = CvGV (cx->blk_sub.cv);
1025 SV *fullname = sv_2mortal (newSV (0));
1026
1027 if (isGV (gv))
1028 gv_efullname3 (fullname, gv, 0);
1029
1030 PL_runops = RUNOPS_DEFAULT;
1031 ENTER;
1032 SAVETMPS;
1033 EXTEND (SP, 3);
1034 PUSHMARK (SP);
1035 PUSHs (&PL_sv_yes);
1036 PUSHs (fullname);
1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1038 PUTBACK;
1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1041 SPAGAIN;
1042 FREETMPS;
1043 LEAVE;
1044 PL_runops = runops_trace;
1045 }
1046
1047 oldcxix = cxstack_ix;
1048 }
1049
1050 if (cctx->flags & CC_TRACE_LINE)
1051 {
1052 dSP;
1053
1054 PL_runops = RUNOPS_DEFAULT;
1055 ENTER;
1056 SAVETMPS;
1057 EXTEND (SP, 3);
1058 PL_runops = RUNOPS_DEFAULT;
1059 PUSHMARK (SP);
1060 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1061 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1062 PUTBACK;
1063 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1064 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1065 SPAGAIN;
1066 FREETMPS;
1067 LEAVE;
1068 PL_runops = runops_trace;
1069 }
1070 }
1071 }
1072 }
1073 }
1074
1075 TAINT_NOT;
1076 return 0;
1077}
1078
1079static struct coro_cctx *cctx_ssl_cctx;
1080static struct CoroSLF cctx_ssl_frame;
1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
545static void NOINLINE 1098static void NOINLINE
546prepare_cctx (coro_cctx *cctx) 1099cctx_prepare (pTHX_ coro_cctx *cctx)
547{ 1100{
548 dSP;
549 LOGOP myop;
550
551 Zero (&myop, 1, LOGOP);
552 myop.op_next = PL_op;
553 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
554
555 PUSHMARK (SP);
556 EXTEND (SP, 2);
557 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
558 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
559 PUTBACK;
560 PL_op = (OP *)&myop;
561 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
562 SPAGAIN;
563}
564
565static void
566coro_run (void *arg)
567{
568 /* coro_run is the alternative tail of transfer(), so unlock here. */
569 UNLOCK;
570
571 /*
572 * this is a _very_ stripped down perl interpreter ;)
573 */
574 PL_top_env = &PL_start_env; 1101 PL_top_env = &PL_start_env;
575 1102
1103 if (cctx->flags & CC_TRACE)
1104 PL_runops = runops_trace;
1105
1106 /* we already must be executing an SLF op, there is no other valid way
1107 * that can lead to creation of a new cctx */
1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1110
1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1112 cctx_ssl_cctx = cctx;
1113 cctx_ssl_frame = slf_frame;
1114
1115 slf_frame.prepare = slf_prepare_set_stacklevel;
1116 slf_frame.check = slf_check_set_stacklevel;
1117}
1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
1124}
1125
1126/*
1127 * this is a _very_ stripped down perl interpreter ;)
1128 */
1129static void
1130cctx_run (void *arg)
1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
1138 dTHX;
1139
1140 /* normally we would need to skip the entersub here */
1141 /* not doing so will re-execute it, which is exactly what we want */
1142 /* PL_nop = PL_nop->op_next */
1143
576 /* inject call to cctx_init */ 1144 /* inject a fake subroutine call to cctx_init */
577 prepare_cctx ((coro_cctx *)arg); 1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
578 1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
579 /* somebody will hit me for both perl_run and PL_restartop */ 1150 /* somebody or something will hit me for both perl_run and PL_restartop */
580 PL_restartop = PL_op; 1151 PL_restartop = PL_op;
581 perl_run (PL_curinterp); 1152 perl_run (PL_curinterp);
1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
582 1157
583 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1158 /*
584 abort (); 1159 * If perl-run returns we assume exit() was being called or the coro
1160 * fell off the end, which seems to be the only valid (non-bug)
1161 * reason for perl_run to return. We try to exit by jumping to the
1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
1163 * coroutine as Coro has no such concept
1164 */
1165 PL_top_env = main_top_env;
1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
585} 1168}
586 1169
587static coro_cctx * 1170static coro_cctx *
588cctx_new () 1171cctx_new ()
589{ 1172{
590 coro_cctx *cctx; 1173 coro_cctx *cctx;
591 1174
592 ++cctx_count; 1175 ++cctx_count;
593
594 Newz (0, cctx, 1, coro_cctx); 1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202 void *stack_start;
1203 size_t stack_size;
595 1204
596#if HAVE_MMAP 1205#if HAVE_MMAP
597
598 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
599 /* mmap supposedly does allocate-on-write for us */ 1207 /* mmap supposedly does allocate-on-write for us */
600 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
601 1209
602 if (cctx->sptr == (void *)-1) 1210 if (cctx->sptr != (void *)-1)
1211 {
1212 #if CORO_STACKGUARD
1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1214 #endif
1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1217 cctx->flags |= CC_MAPPED;
603 { 1218 }
1219 else
1220#endif
1221 {
1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1223 New (0, cctx->sptr, cctx_stacksize, long);
1224
1225 if (!cctx->sptr)
1226 {
604 perror ("FATAL: unable to mmap stack for coroutine"); 1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
605 _exit (EXIT_FAILURE); 1228 _exit (EXIT_FAILURE);
606 } 1229 }
607 1230
608# if STACKGUARD 1231 stack_start = cctx->sptr;
609 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1232 stack_size = cctx->ssize;
610# endif
611
612#else
613
614 cctx->ssize = STACKSIZE * (long)sizeof (long);
615 New (0, cctx->sptr, STACKSIZE, long);
616
617 if (!cctx->sptr)
618 { 1233 }
619 perror ("FATAL: unable to malloc stack for coroutine");
620 _exit (EXIT_FAILURE);
621 }
622 1234
1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
623#endif 1237 #endif
624 1238
625#if USE_VALGRIND 1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
626 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
627 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
628 cctx->ssize + (char *)cctx->sptr
629 );
630#endif
631
632 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
633 1240
634 return cctx; 1241 return cctx;
635} 1242}
636 1243
637static void 1244static void
… …
639{ 1246{
640 if (!cctx) 1247 if (!cctx)
641 return; 1248 return;
642 1249
643 --cctx_count; 1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
644 1252
645#if USE_VALGRIND 1253 /* coro_transfer creates new, empty cctx's */
1254 if (cctx->sptr)
1255 {
1256 #if CORO_USE_VALGRIND
646 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
647#endif 1258 #endif
648 1259
649#if HAVE_MMAP 1260#if HAVE_MMAP
1261 if (cctx->flags & CC_MAPPED)
650 munmap (cctx->sptr, cctx->ssize); 1262 munmap (cctx->sptr, cctx->ssize);
651#else 1263 else
1264#endif
652 Safefree (cctx->sptr); 1265 Safefree (cctx->sptr);
653#endif 1266 }
654 1267
655 Safefree (cctx); 1268 Safefree (cctx);
656} 1269}
657 1270
1271/* wether this cctx should be destructed */
1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1273
658static coro_cctx * 1274static coro_cctx *
659cctx_get () 1275cctx_get (pTHX)
660{ 1276{
661 coro_cctx *cctx; 1277 while (expect_true (cctx_first))
662
663 if (cctx_first)
664 { 1278 {
665 cctx = cctx_first; 1279 coro_cctx *cctx = cctx_first;
666 cctx_first = cctx->next; 1280 cctx_first = cctx->next;
667 --cctx_idle; 1281 --cctx_idle;
668 } 1282
669 else 1283 if (expect_true (!CCTX_EXPIRED (cctx)))
670 { 1284 return cctx;
671 cctx = cctx_new (); 1285
672 PL_op = PL_op->op_next; 1286 cctx_destroy (cctx);
673 } 1287 }
674 1288
675 return cctx; 1289 return cctx_new_run ();
676} 1290}
677 1291
678static void 1292static void
679cctx_put (coro_cctx *cctx) 1293cctx_put (coro_cctx *cctx)
680{ 1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
681 /* free another cctx if overlimit */ 1297 /* free another cctx if overlimit */
682 if (cctx_idle >= MAX_IDLE_CCTX) 1298 if (expect_false (cctx_idle >= cctx_max_idle))
683 { 1299 {
684 coro_cctx *first = cctx_first; 1300 coro_cctx *first = cctx_first;
685 cctx_first = first->next; 1301 cctx_first = first->next;
686 --cctx_idle; 1302 --cctx_idle;
687 1303
688 assert (!first->inuse);
689 cctx_destroy (first); 1304 cctx_destroy (first);
690 } 1305 }
691 1306
692 ++cctx_idle; 1307 ++cctx_idle;
693 cctx->next = cctx_first; 1308 cctx->next = cctx_first;
694 cctx_first = cctx; 1309 cctx_first = cctx;
695} 1310}
696 1311
697/* never call directly, always through the coro_state_transfer global variable */ 1312/** coroutine switching *****************************************************/
698static void NOINLINE 1313
1314static void
699transfer (struct coro *prev, struct coro *next) 1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1319 if (expect_true (prev != next))
1320 {
1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1323
1324 if (expect_false (next->flags & CF_RUNNING))
1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1326
1327 if (expect_false (next->flags & CF_DESTROYED))
1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1329
1330#if !PERL_VERSION_ATLEAST (5,10,0)
1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1334 }
1335}
1336
1337/* always use the TRANSFER macro */
1338static void NOINLINE /* noinline so we have a fixed stackframe */
1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
700{ 1340{
701 dSTACKLEVEL; 1341 dSTACKLEVEL;
702 1342
703 /* sometimes transfer is only called to set idle_sp */ 1343 /* sometimes transfer is only called to set idle_sp */
704 if (!next) 1344 if (expect_false (!next))
705 { 1345 {
706 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1346 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
707 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1347 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
708 } 1348 }
709 else if (prev != next) 1349 else if (expect_true (prev != next))
710 { 1350 {
711 coro_cctx *prev__cctx; 1351 coro_cctx *prev__cctx;
712 1352
713 if (prev->flags & CF_NEW) 1353 if (expect_false (prev->flags & CF_NEW))
714 { 1354 {
715 /* create a new empty context */ 1355 /* create a new empty/source context */
716 Newz (0, prev->cctx, 1, coro_cctx); 1356 prev->cctx = cctx_new_empty ();
717 prev->cctx->inuse = 1;
718 prev->flags &= ~CF_NEW; 1357 prev->flags &= ~CF_NEW;
719 prev->flags |= CF_RUNNING; 1358 prev->flags |= CF_RUNNING;
720 } 1359 }
721 1360
722 /*TODO: must not croak here */
723 if (!prev->flags & CF_RUNNING)
724 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
725
726 if (next->flags & CF_RUNNING)
727 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
728
729 prev->flags &= ~CF_RUNNING; 1361 prev->flags &= ~CF_RUNNING;
730 next->flags |= CF_RUNNING; 1362 next->flags |= CF_RUNNING;
731 1363
732 LOCK; 1364 /* first get rid of the old state */
1365 save_perl (aTHX_ prev);
733 1366
734 if (next->flags & CF_NEW) 1367 if (expect_false (next->flags & CF_NEW))
735 { 1368 {
736 /* need to start coroutine */ 1369 /* need to start coroutine */
737 next->flags &= ~CF_NEW; 1370 next->flags &= ~CF_NEW;
738 /* first get rid of the old state */
739 save_perl (prev);
740 /* setup coroutine call */ 1371 /* setup coroutine call */
741 setup_coro (next); 1372 coro_setup (aTHX_ next);
742 /* need a new stack */
743 assert (!next->cctx);
744 } 1373 }
745 else 1374 else
1375 load_perl (aTHX_ next);
1376
1377 prev__cctx = prev->cctx;
1378
1379 /* possibly untie and reuse the cctx */
1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
746 { 1385 {
747 /* coroutine already started */ 1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
748 save_perl (prev); 1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
749 load_perl (next); 1388
1389 prev->cctx = 0;
1390
1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1393 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1394 if (!next->cctx)
1395 next->cctx = cctx_get (aTHX);
1396
1397 cctx_put (prev__cctx);
750 } 1398 }
751 1399
752 prev__cctx = prev->cctx; 1400 ++next->usecount;
753 1401
754 /* possibly "free" the cctx */
755 if (prev__cctx->idle_sp == STACKLEVEL)
756 {
757 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
758 assert (PL_top_env == prev__cctx->top_env);
759
760 prev->cctx = 0;
761
762 cctx_put (prev__cctx);
763 prev__cctx->inuse = 0;
764 }
765
766 if (!next->cctx) 1402 if (expect_true (!next->cctx))
767 {
768 next->cctx = cctx_get (); 1403 next->cctx = cctx_get (aTHX);
769 assert (!next->cctx->inuse);
770 next->cctx->inuse = 1;
771 }
772 1404
773 if (prev__cctx != next->cctx) 1405 if (expect_false (prev__cctx != next->cctx))
774 { 1406 {
775 prev__cctx->top_env = PL_top_env; 1407 prev__cctx->top_env = PL_top_env;
776 PL_top_env = next->cctx->top_env; 1408 PL_top_env = next->cctx->top_env;
777 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
778 } 1410 }
779 1411
780 free_coro_mortal (); 1412 transfer_tail (aTHX);
781
782 UNLOCK;
783 } 1413 }
784} 1414}
785 1415
786struct transfer_args 1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
787{
788 struct coro *prev, *next;
789};
790
791#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
792 1418
1419/** high level stuff ********************************************************/
1420
793static void 1421static int
794coro_state_destroy (struct coro *coro) 1422coro_state_destroy (pTHX_ struct coro *coro)
795{ 1423{
796 if (coro->refcnt--) 1424 if (coro->flags & CF_DESTROYED)
797 return; 1425 return 0;
1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1429
1430 coro->flags |= CF_DESTROYED;
1431
1432 if (coro->flags & CF_READY)
1433 {
1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1435 /* alternative: look through all ready queues and remove the coro */
1436 --coro_nready;
1437 }
1438 else
1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798 1440
799 if (coro->mainstack && coro->mainstack != main_mainstack) 1441 if (coro->mainstack && coro->mainstack != main_mainstack)
800 { 1442 {
801 struct coro temp; 1443 struct coro temp;
802 Zero (&temp, 1, struct coro);
803 temp.save = CORO_SAVE_ALL;
804 1444
805 if (coro->flags & CF_RUNNING) 1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
806 croak ("FATAL: tried to destroy currently running coroutine");
807 1446
808 save_perl (&temp); 1447 save_perl (aTHX_ &temp);
809 load_perl (coro); 1448 load_perl (aTHX_ coro);
810 1449
811 coro_destroy_stacks (); 1450 coro_destruct (aTHX_ coro);
812 1451
813 load_perl (&temp); /* this will get rid of defsv etc.. */ 1452 load_perl (aTHX_ &temp);
814 1453
815 coro->mainstack = 0; 1454 coro->slot = 0;
816 } 1455 }
817 1456
818 cctx_destroy (coro->cctx); 1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
819 SvREFCNT_dec (coro->args); 1459 SvREFCNT_dec (coro->args);
820 Safefree (coro); 1460 SvREFCNT_dec (CORO_THROW);
1461
1462 if (coro->next) coro->next->prev = coro->prev;
1463 if (coro->prev) coro->prev->next = coro->next;
1464 if (coro == coro_first) coro_first = coro->next;
1465
1466 return 1;
821} 1467}
822 1468
823static int 1469static int
824coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1470coro_state_free (pTHX_ SV *sv, MAGIC *mg)
825{ 1471{
826 struct coro *coro = (struct coro *)mg->mg_ptr; 1472 struct coro *coro = (struct coro *)mg->mg_ptr;
827 mg->mg_ptr = 0; 1473 mg->mg_ptr = 0;
828 1474
1475 coro->hv = 0;
1476
1477 if (--coro->refcnt < 0)
1478 {
829 coro_state_destroy (coro); 1479 coro_state_destroy (aTHX_ coro);
1480 Safefree (coro);
1481 }
830 1482
831 return 0; 1483 return 0;
832} 1484}
833 1485
834static int 1486static int
… …
841 return 0; 1493 return 0;
842} 1494}
843 1495
844static MGVTBL coro_state_vtbl = { 1496static MGVTBL coro_state_vtbl = {
845 0, 0, 0, 0, 1497 0, 0, 0, 0,
846 coro_state_clear, 1498 coro_state_free,
847 0, 1499 0,
848#ifdef MGf_DUP 1500#ifdef MGf_DUP
849 coro_state_dup, 1501 coro_state_dup,
850#else 1502#else
851# define MGf_DUP 0 1503# define MGf_DUP 0
852#endif 1504#endif
853}; 1505};
854 1506
855static struct coro *
856SvSTATE (SV *coro)
857{
858 HV *stash;
859 MAGIC *mg;
860
861 if (SvROK (coro))
862 coro = SvRV (coro);
863
864 stash = SvSTASH (coro);
865 if (stash != coro_stash && stash != coro_state_stash)
866 {
867 /* very slow, but rare, check */
868 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
869 croak ("Coro::State object required");
870 }
871
872 mg = SvMAGIC (coro);
873 assert (mg->mg_type == PERL_MAGIC_ext);
874 return (struct coro *)mg->mg_ptr;
875}
876
877static void 1507static void
878prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
879{ 1509{
880 ta->prev = SvSTATE (prev_sv); 1510 ta->prev = SvSTATE (prev_sv);
881 ta->next = SvSTATE (next_sv); 1511 ta->next = SvSTATE (next_sv);
1512 TRANSFER_CHECK (*ta);
882} 1513}
883 1514
884static void 1515static void
885api_transfer (SV *prev_sv, SV *next_sv) 1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
886{ 1517{
887 struct transfer_args ta; 1518 struct coro_transfer_args ta;
888 1519
889 prepare_transfer (&ta, prev_sv, next_sv); 1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
890 TRANSFER (ta); 1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1545}
1546
1547/** Coro ********************************************************************/
1548
1549INLINE void
1550coro_enq (pTHX_ struct coro *coro)
1551{
1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1553}
1554
1555INLINE SV *
1556coro_deq (pTHX)
1557{
1558 int prio;
1559
1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1561 if (AvFILLp (coro_ready [prio]) >= 0)
1562 return av_shift (coro_ready [prio]);
1563
1564 return 0;
891} 1565}
892 1566
893static int 1567static int
894api_save (SV *coro_sv, int new_save)
895{
896 struct coro *coro = SvSTATE (coro_sv);
897 int old_save = coro->save;
898
899 if (new_save >= 0)
900 coro->save = new_save;
901
902 return old_save;
903}
904
905/** Coro ********************************************************************/
906
907#define PRIO_MAX 3
908#define PRIO_HIGH 1
909#define PRIO_NORMAL 0
910#define PRIO_LOW -1
911#define PRIO_IDLE -3
912#define PRIO_MIN -4
913
914/* for Coro.pm */
915static SV *coro_current;
916static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
917static int coro_nready;
918
919static void
920coro_enq (SV *coro_sv)
921{
922 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
923 coro_nready++;
924}
925
926static SV *
927coro_deq (int min_prio)
928{
929 int prio = PRIO_MAX - PRIO_MIN;
930
931 min_prio -= PRIO_MIN;
932 if (min_prio < 0)
933 min_prio = 0;
934
935 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
936 if (AvFILLp (coro_ready [prio]) >= 0)
937 {
938 coro_nready--;
939 return av_shift (coro_ready [prio]);
940 }
941
942 return 0;
943}
944
945static int
946api_ready (SV *coro_sv) 1568api_ready (pTHX_ SV *coro_sv)
947{ 1569{
948 struct coro *coro; 1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
949 1573
950 if (SvROK (coro_sv)) 1574 if (SvROK (coro_sv))
951 coro_sv = SvRV (coro_sv); 1575 coro_sv = SvRV (coro_sv);
952 1576
953 coro = SvSTATE (coro_sv); 1577 coro = SvSTATE (coro_sv);
954 1578
955 if (coro->flags & CF_READY) 1579 if (coro->flags & CF_READY)
956 return 0; 1580 return 0;
957 1581
958#if 0 /* this is actually harmless */
959 if (coro->flags & CF_RUNNING)
960 croak ("Coro::ready called on currently running coroutine");
961#endif
962
963 coro->flags |= CF_READY; 1582 coro->flags |= CF_READY;
964 1583
965 LOCK; 1584 sv_hook = coro_nready ? 0 : coro_readyhook;
966 coro_enq (SvREFCNT_inc (coro_sv)); 1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
967 UNLOCK; 1586
1587 coro_enq (aTHX_ coro);
1588 ++coro_nready;
1589
1590 if (sv_hook)
1591 {
1592 dSP;
1593
1594 ENTER;
1595 SAVETMPS;
1596
1597 PUSHMARK (SP);
1598 PUTBACK;
1599 call_sv (sv_hook, G_VOID | G_DISCARD);
1600
1601 FREETMPS;
1602 LEAVE;
1603 }
1604
1605 if (xs_hook)
1606 xs_hook ();
968 1607
969 return 1; 1608 return 1;
970} 1609}
971 1610
972static int 1611static int
973api_is_ready (SV *coro_sv) 1612api_is_ready (pTHX_ SV *coro_sv)
974{ 1613{
975 return !!SvSTATE (coro_sv)->flags & CF_READY; 1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
976} 1615}
977 1616
978static void 1617INLINE void
979prepare_schedule (struct transfer_args *ta) 1618prepare_schedule (pTHX_ struct coro_transfer_args *ta)
980{ 1619{
981 SV *prev, *next; 1620 SV *prev_sv, *next_sv;
982 1621
983 for (;;) 1622 for (;;)
984 { 1623 {
985 LOCK;
986 next = coro_deq (PRIO_MIN); 1624 next_sv = coro_deq (aTHX);
987 UNLOCK;
988 1625
989 if (next) 1626 /* nothing to schedule: call the idle handler */
1627 if (expect_false (!next_sv))
1628 {
1629 dSP;
1630
1631 ENTER;
1632 SAVETMPS;
1633
1634 PUSHMARK (SP);
1635 PUTBACK;
1636 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1637
1638 FREETMPS;
1639 LEAVE;
1640 continue;
1641 }
1642
1643 ta->next = SvSTATE_hv (next_sv);
1644
1645 /* cannot transfer to destroyed coros, skip and look for next */
1646 if (expect_false (ta->next->flags & CF_DESTROYED))
1647 {
1648 SvREFCNT_dec (next_sv);
1649 /* coro_nready has already been taken care of by destroy */
1650 continue;
1651 }
1652
1653 --coro_nready;
990 break; 1654 break;
1655 }
1656
1657 /* free this only after the transfer */
1658 prev_sv = SvRV (coro_current);
1659 ta->prev = SvSTATE_hv (prev_sv);
1660 TRANSFER_CHECK (*ta);
1661 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1662 ta->next->flags &= ~CF_READY;
1663 SvRV_set (coro_current, next_sv);
1664
1665 free_coro_mortal (aTHX);
1666 coro_mortal = prev_sv;
1667}
1668
1669INLINE void
1670prepare_cede (pTHX_ struct coro_transfer_args *ta)
1671{
1672 api_ready (aTHX_ coro_current);
1673 prepare_schedule (aTHX_ ta);
1674}
1675
1676INLINE void
1677prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1678{
1679 SV *prev = SvRV (coro_current);
1680
1681 if (coro_nready)
1682 {
1683 prepare_schedule (aTHX_ ta);
1684 api_ready (aTHX_ prev);
1685 }
1686 else
1687 prepare_nop (aTHX_ ta);
1688}
1689
1690static void
1691api_schedule (pTHX)
1692{
1693 struct coro_transfer_args ta;
1694
1695 prepare_schedule (aTHX_ &ta);
1696 TRANSFER (ta, 1);
1697}
1698
1699static int
1700api_cede (pTHX)
1701{
1702 struct coro_transfer_args ta;
1703
1704 prepare_cede (aTHX_ &ta);
1705
1706 if (expect_true (ta.prev != ta.next))
1707 {
1708 TRANSFER (ta, 1);
1709 return 1;
1710 }
1711 else
1712 return 0;
1713}
1714
1715static int
1716api_cede_notself (pTHX)
1717{
1718 if (coro_nready)
1719 {
1720 struct coro_transfer_args ta;
1721
1722 prepare_cede_notself (aTHX_ &ta);
1723 TRANSFER (ta, 1);
1724 return 1;
1725 }
1726 else
1727 return 0;
1728}
1729
1730static void
1731api_trace (pTHX_ SV *coro_sv, int flags)
1732{
1733 struct coro *coro = SvSTATE (coro_sv);
1734
1735 if (flags & CC_TRACE)
1736 {
1737 if (!coro->cctx)
1738 coro->cctx = cctx_new_run ();
1739 else if (!(coro->cctx->flags & CC_TRACE))
1740 croak ("cannot enable tracing on coroutine with custom stack,");
1741
1742 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1743 }
1744 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1745 {
1746 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1747
1748 if (coro->flags & CF_RUNNING)
1749 PL_runops = RUNOPS_DEFAULT;
1750 else
1751 coro->slot->runops = RUNOPS_DEFAULT;
1752 }
1753}
1754
1755/*****************************************************************************/
1756/* async pool handler */
1757
1758static int
1759slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1760{
1761 HV *hv = (HV *)SvRV (coro_current);
1762 struct coro *coro = (struct coro *)frame->data;
1763
1764 if (!coro->invoke_cb)
1765 return 1; /* loop till we have invoke */
1766 else
1767 {
1768 hv_store (hv, "desc", sizeof ("desc") - 1,
1769 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1770
1771 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
991 1772
992 { 1773 {
993 dSP; 1774 dSP;
994 1775 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
995 ENTER;
996 SAVETMPS;
997
998 PUSHMARK (SP);
999 PUTBACK; 1776 PUTBACK;
1000 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1001
1002 FREETMPS;
1003 LEAVE;
1004 } 1777 }
1778
1779 SvREFCNT_dec (GvAV (PL_defgv));
1780 GvAV (PL_defgv) = coro->invoke_av;
1781 coro->invoke_av = 0;
1782
1783 return 0;
1784 }
1785}
1786
1787static void
1788slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1789{
1790 HV *hv = (HV *)SvRV (coro_current);
1791 struct coro *coro = SvSTATE_hv ((SV *)hv);
1792
1793 if (expect_true (coro->saved_deffh))
1005 } 1794 {
1795 /* subsequent iteration */
1796 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1797 coro->saved_deffh = 0;
1006 1798
1799 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1800 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1801 {
1802 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1803 coro->invoke_av = newAV ();
1804
1805 frame->prepare = prepare_nop;
1806 }
1807 else
1808 {
1809 av_clear (GvAV (PL_defgv));
1810 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1811
1812 coro->prio = 0;
1813
1814 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1815 api_trace (aTHX_ coro_current, 0);
1816
1817 frame->prepare = prepare_schedule;
1818 av_push (av_async_pool, SvREFCNT_inc (hv));
1819 }
1820 }
1821 else
1822 {
1823 /* first iteration, simply fall through */
1824 frame->prepare = prepare_nop;
1825 }
1826
1827 frame->check = slf_check_pool_handler;
1828 frame->data = (void *)coro;
1829}
1830
1831/*****************************************************************************/
1832/* rouse callback */
1833
1834#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1835
1836static void
1837coro_rouse_callback (pTHX_ CV *cv)
1838{
1839 dXSARGS;
1840 SV *data = (SV *)GENSUB_ARG;
1841
1842 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1843 {
1844 /* first call, set args */
1845 AV *av = newAV ();
1846 SV *coro = SvRV (data);
1847
1848 SvRV_set (data, (SV *)av);
1849 api_ready (aTHX_ coro);
1850 SvREFCNT_dec (coro);
1851
1852 /* better take a full copy of the arguments */
1853 while (items--)
1854 av_store (av, items, newSVsv (ST (items)));
1855 }
1856
1857 XSRETURN_EMPTY;
1858}
1859
1860static int
1861slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1862{
1863 SV *data = (SV *)frame->data;
1864
1865 if (CORO_THROW)
1866 return 0;
1867
1868 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1869 return 1;
1870
1871 /* now push all results on the stack */
1872 {
1873 dSP;
1874 AV *av = (AV *)SvRV (data);
1875 int i;
1876
1877 EXTEND (SP, AvFILLp (av) + 1);
1878 for (i = 0; i <= AvFILLp (av); ++i)
1879 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1880
1881 /* we have stolen the elements, so ste length to zero and free */
1882 AvFILLp (av) = -1;
1883 av_undef (av);
1884
1885 PUTBACK;
1886 }
1887
1888 return 0;
1889}
1890
1891static void
1892slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1893{
1894 SV *cb;
1895
1896 if (items)
1897 cb = arg [0];
1898 else
1899 {
1900 struct coro *coro = SvSTATE_current;
1901
1902 if (!coro->rouse_cb)
1903 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1904
1905 cb = sv_2mortal (coro->rouse_cb);
1906 coro->rouse_cb = 0;
1907 }
1908
1909 if (!SvROK (cb)
1910 || SvTYPE (SvRV (cb)) != SVt_PVCV
1911 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1912 croak ("Coro::rouse_wait called with illegal callback argument,");
1913
1914 {
1915 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1916 SV *data = (SV *)GENSUB_ARG;
1917
1918 frame->data = (void *)data;
1919 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1920 frame->check = slf_check_rouse_wait;
1921 }
1922}
1923
1924static SV *
1925coro_new_rouse_cb (pTHX)
1926{
1007 prev = SvRV (coro_current); 1927 HV *hv = (HV *)SvRV (coro_current);
1008 SvRV_set (coro_current, next); 1928 struct coro *coro = SvSTATE_hv (hv);
1929 SV *data = newRV_inc ((SV *)hv);
1930 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1009 1931
1010 /* free this only after the transfer */ 1932 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1011 LOCK; 1933 SvREFCNT_dec (data); /* magicext increases the refcount */
1012 free_coro_mortal ();
1013 UNLOCK;
1014 coro_mortal = prev;
1015 1934
1016 assert (!SvROK(prev));//D 1935 SvREFCNT_dec (coro->rouse_cb);
1017 assert (!SvROK(next));//D 1936 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1018 1937
1019 ta->prev = SvSTATE (prev); 1938 return cb;
1020 ta->next = SvSTATE (next);
1021
1022 assert (ta->next->flags & CF_READY);
1023 ta->next->flags &= ~CF_READY;
1024} 1939}
1025 1940
1026static void 1941/*****************************************************************************/
1027prepare_cede (struct transfer_args *ta) 1942/* schedule-like-function opcode (SLF) */
1028{
1029 api_ready (coro_current);
1030 1943
1031 prepare_schedule (ta); 1944static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1032} 1945static const CV *slf_cv;
1946static SV **slf_argv;
1947static int slf_argc, slf_arga; /* count, allocated */
1948static I32 slf_ax; /* top of stack, for restore */
1033 1949
1034static void 1950/* this restores the stack in the case we patched the entersub, to */
1035api_schedule (void) 1951/* recreate the stack frame as perl will on following calls */
1952/* since entersub cleared the stack */
1953static OP *
1954pp_restore (pTHX)
1036{ 1955{
1956 int i;
1957 SV **SP = PL_stack_base + slf_ax;
1958
1959 PUSHMARK (SP);
1960
1961 EXTEND (SP, slf_argc + 1);
1962
1963 for (i = 0; i < slf_argc; ++i)
1964 PUSHs (sv_2mortal (slf_argv [i]));
1965
1966 PUSHs ((SV *)CvGV (slf_cv));
1967
1968 RETURNOP (slf_restore.op_first);
1969}
1970
1971static void
1972slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV **arg = (SV **)slf_frame.data;
1975
1976 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1977}
1978
1979static void
1980slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1981{
1982 if (items != 2)
1983 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1984
1985 frame->prepare = slf_prepare_transfer;
1986 frame->check = slf_check_nop;
1987 frame->data = (void *)arg; /* let's hope it will stay valid */
1988}
1989
1990static void
1991slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 frame->prepare = prepare_schedule;
1994 frame->check = slf_check_nop;
1995}
1996
1997static void
1998slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1999{
2000 frame->prepare = prepare_cede;
2001 frame->check = slf_check_nop;
2002}
2003
2004static void
2005slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2006{
2007 frame->prepare = prepare_cede_notself;
2008 frame->check = slf_check_nop;
2009}
2010
2011/*
2012 * these not obviously related functions are all rolled into one
2013 * function to increase chances that they all will call transfer with the same
2014 * stack offset
2015 * SLF stands for "schedule-like-function".
2016 */
2017static OP *
2018pp_slf (pTHX)
2019{
2020 I32 checkmark; /* mark SP to see how many elements check has pushed */
2021
2022 /* set up the slf frame, unless it has already been set-up */
2023 /* the latter happens when a new coro has been started */
2024 /* or when a new cctx was attached to an existing coroutine */
2025 if (expect_true (!slf_frame.prepare))
2026 {
2027 /* first iteration */
2028 dSP;
2029 SV **arg = PL_stack_base + TOPMARK + 1;
2030 int items = SP - arg; /* args without function object */
2031 SV *gv = *sp;
2032
2033 /* do a quick consistency check on the "function" object, and if it isn't */
2034 /* for us, divert to the real entersub */
2035 if (SvTYPE (gv) != SVt_PVGV
2036 || !GvCV (gv)
2037 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2038 return PL_ppaddr[OP_ENTERSUB](aTHX);
2039
2040 if (!(PL_op->op_flags & OPf_STACKED))
2041 {
2042 /* ampersand-form of call, use @_ instead of stack */
2043 AV *av = GvAV (PL_defgv);
2044 arg = AvARRAY (av);
2045 items = AvFILLp (av) + 1;
2046 }
2047
2048 /* now call the init function, which needs to set up slf_frame */
2049 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2050 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2051
2052 /* pop args */
2053 SP = PL_stack_base + POPMARK;
2054
2055 PUTBACK;
2056 }
2057
2058 /* now that we have a slf_frame, interpret it! */
2059 /* we use a callback system not to make the code needlessly */
2060 /* complicated, but so we can run multiple perl coros from one cctx */
2061
2062 do
2063 {
1037 struct transfer_args ta; 2064 struct coro_transfer_args ta;
1038 2065
1039 prepare_schedule (&ta); 2066 slf_frame.prepare (aTHX_ &ta);
1040 TRANSFER (ta); 2067 TRANSFER (ta, 0);
1041}
1042 2068
2069 checkmark = PL_stack_sp - PL_stack_base;
2070 }
2071 while (slf_frame.check (aTHX_ &slf_frame));
2072
2073 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2074
2075 /* exception handling */
2076 if (expect_false (CORO_THROW))
2077 {
2078 SV *exception = sv_2mortal (CORO_THROW);
2079
2080 CORO_THROW = 0;
2081 sv_setsv (ERRSV, exception);
2082 croak (0);
2083 }
2084
2085 /* return value handling - mostly like entersub */
2086 /* make sure we put something on the stack in scalar context */
2087 if (GIMME_V == G_SCALAR)
2088 {
2089 dSP;
2090 SV **bot = PL_stack_base + checkmark;
2091
2092 if (sp == bot) /* too few, push undef */
2093 bot [1] = &PL_sv_undef;
2094 else if (sp != bot + 1) /* too many, take last one */
2095 bot [1] = *sp;
2096
2097 SP = bot + 1;
2098
2099 PUTBACK;
2100 }
2101
2102 return NORMAL;
2103}
2104
2105static void
2106api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2107{
2108 int i;
2109 SV **arg = PL_stack_base + ax;
2110 int items = PL_stack_sp - arg + 1;
2111
2112 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2113
2114 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2115 && PL_op->op_ppaddr != pp_slf)
2116 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2117
2118 CvFLAGS (cv) |= CVf_SLF;
2119 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2120 slf_cv = cv;
2121
2122 /* we patch the op, and then re-run the whole call */
2123 /* we have to put the same argument on the stack for this to work */
2124 /* and this will be done by pp_restore */
2125 slf_restore.op_next = (OP *)&slf_restore;
2126 slf_restore.op_type = OP_CUSTOM;
2127 slf_restore.op_ppaddr = pp_restore;
2128 slf_restore.op_first = PL_op;
2129
2130 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2131
2132 if (PL_op->op_flags & OPf_STACKED)
2133 {
2134 if (items > slf_arga)
2135 {
2136 slf_arga = items;
2137 free (slf_argv);
2138 slf_argv = malloc (slf_arga * sizeof (SV *));
2139 }
2140
2141 slf_argc = items;
2142
2143 for (i = 0; i < items; ++i)
2144 slf_argv [i] = SvREFCNT_inc (arg [i]);
2145 }
2146 else
2147 slf_argc = 0;
2148
2149 PL_op->op_ppaddr = pp_slf;
2150 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2151
2152 PL_op = (OP *)&slf_restore;
2153}
2154
2155/*****************************************************************************/
2156/* PerlIO::cede */
2157
2158typedef struct
2159{
2160 PerlIOBuf base;
2161 NV next, every;
2162} PerlIOCede;
2163
2164static IV
2165PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2166{
2167 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2168
2169 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2170 self->next = nvtime () + self->every;
2171
2172 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2173}
2174
2175static SV *
2176PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2177{
2178 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2179
2180 return newSVnv (self->every);
2181}
2182
2183static IV
2184PerlIOCede_flush (pTHX_ PerlIO *f)
2185{
2186 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2187 double now = nvtime ();
2188
2189 if (now >= self->next)
2190 {
2191 api_cede (aTHX);
2192 self->next = now + self->every;
2193 }
2194
2195 return PerlIOBuf_flush (aTHX_ f);
2196}
2197
2198static PerlIO_funcs PerlIO_cede =
2199{
2200 sizeof(PerlIO_funcs),
2201 "cede",
2202 sizeof(PerlIOCede),
2203 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2204 PerlIOCede_pushed,
2205 PerlIOBuf_popped,
2206 PerlIOBuf_open,
2207 PerlIOBase_binmode,
2208 PerlIOCede_getarg,
2209 PerlIOBase_fileno,
2210 PerlIOBuf_dup,
2211 PerlIOBuf_read,
2212 PerlIOBuf_unread,
2213 PerlIOBuf_write,
2214 PerlIOBuf_seek,
2215 PerlIOBuf_tell,
2216 PerlIOBuf_close,
2217 PerlIOCede_flush,
2218 PerlIOBuf_fill,
2219 PerlIOBase_eof,
2220 PerlIOBase_error,
2221 PerlIOBase_clearerr,
2222 PerlIOBase_setlinebuf,
2223 PerlIOBuf_get_base,
2224 PerlIOBuf_bufsiz,
2225 PerlIOBuf_get_ptr,
2226 PerlIOBuf_get_cnt,
2227 PerlIOBuf_set_ptrcnt,
2228};
2229
2230/*****************************************************************************/
2231/* Coro::Semaphore & Coro::Signal */
2232
2233static SV *
2234coro_waitarray_new (pTHX_ int count)
2235{
2236 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2237 AV *av = newAV ();
2238 SV **ary;
2239
2240 /* unfortunately, building manually saves memory */
2241 Newx (ary, 2, SV *);
2242 AvALLOC (av) = ary;
2243 /*AvARRAY (av) = ary;*/
2244 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2245 AvMAX (av) = 1;
2246 AvFILLp (av) = 0;
2247 ary [0] = newSViv (count);
2248
2249 return newRV_noinc ((SV *)av);
2250}
2251
2252/* semaphore */
2253
2254static void
2255coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2256{
2257 SV *count_sv = AvARRAY (av)[0];
2258 IV count = SvIVX (count_sv);
2259
2260 count += adjust;
2261 SvIVX (count_sv) = count;
2262
2263 /* now wake up as many waiters as are expected to lock */
2264 while (count > 0 && AvFILLp (av) > 0)
2265 {
2266 SV *cb;
2267
2268 /* swap first two elements so we can shift a waiter */
2269 AvARRAY (av)[0] = AvARRAY (av)[1];
2270 AvARRAY (av)[1] = count_sv;
2271 cb = av_shift (av);
2272
2273 if (SvOBJECT (cb))
2274 {
2275 api_ready (aTHX_ cb);
2276 --count;
2277 }
2278 else if (SvTYPE (cb) == SVt_PVCV)
2279 {
2280 dSP;
2281 PUSHMARK (SP);
2282 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2283 PUTBACK;
2284 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2285 }
2286
2287 SvREFCNT_dec (cb);
2288 }
2289}
2290
2291static void
2292coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2293{
2294 /* call $sem->adjust (0) to possibly wake up some other waiters */
2295 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2296}
2297
1043static void 2298static int
1044api_cede (void) 2299slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1045{ 2300{
1046 struct transfer_args ta; 2301 AV *av = (AV *)frame->data;
2302 SV *count_sv = AvARRAY (av)[0];
1047 2303
1048 prepare_cede (&ta); 2304 /* if we are about to throw, don't actually acquire the lock, just throw */
1049 TRANSFER (ta); 2305 if (CORO_THROW)
1050} 2306 return 0;
2307 else if (SvIVX (count_sv) > 0)
2308 {
2309 SvSTATE_current->on_destroy = 0;
1051 2310
2311 if (acquire)
2312 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2313 else
2314 coro_semaphore_adjust (aTHX_ av, 0);
2315
2316 return 0;
2317 }
2318 else
2319 {
2320 int i;
2321 /* if we were woken up but can't down, we look through the whole */
2322 /* waiters list and only add us if we aren't in there already */
2323 /* this avoids some degenerate memory usage cases */
2324
2325 for (i = 1; i <= AvFILLp (av); ++i)
2326 if (AvARRAY (av)[i] == SvRV (coro_current))
2327 return 1;
2328
2329 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2330 return 1;
2331 }
2332}
2333
2334static int
2335slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2336{
2337 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2338}
2339
2340static int
2341slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2342{
2343 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2344}
2345
2346static void
2347slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2348{
2349 AV *av = (AV *)SvRV (arg [0]);
2350
2351 if (SvIVX (AvARRAY (av)[0]) > 0)
2352 {
2353 frame->data = (void *)av;
2354 frame->prepare = prepare_nop;
2355 }
2356 else
2357 {
2358 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2359
2360 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2361 frame->prepare = prepare_schedule;
2362
2363 /* to avoid race conditions when a woken-up coro gets terminated */
2364 /* we arrange for a temporary on_destroy that calls adjust (0) */
2365 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2366 }
2367}
2368
2369static void
2370slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2371{
2372 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2373 frame->check = slf_check_semaphore_down;
2374}
2375
2376static void
2377slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items >= 2)
2380 {
2381 /* callback form */
2382 AV *av = (AV *)SvRV (arg [0]);
2383 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2384
2385 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2386
2387 if (SvIVX (AvARRAY (av)[0]) > 0)
2388 coro_semaphore_adjust (aTHX_ av, 0);
2389
2390 frame->prepare = prepare_nop;
2391 frame->check = slf_check_nop;
2392 }
2393 else
2394 {
2395 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2396 frame->check = slf_check_semaphore_wait;
2397 }
2398}
2399
2400/* signal */
2401
2402static void
2403coro_signal_wake (pTHX_ AV *av, int count)
2404{
2405 SvIVX (AvARRAY (av)[0]) = 0;
2406
2407 /* now signal count waiters */
2408 while (count > 0 && AvFILLp (av) > 0)
2409 {
2410 SV *cb;
2411
2412 /* swap first two elements so we can shift a waiter */
2413 cb = AvARRAY (av)[0];
2414 AvARRAY (av)[0] = AvARRAY (av)[1];
2415 AvARRAY (av)[1] = cb;
2416
2417 cb = av_shift (av);
2418
2419 api_ready (aTHX_ cb);
2420 sv_setiv (cb, 0); /* signal waiter */
2421 SvREFCNT_dec (cb);
2422
2423 --count;
2424 }
2425}
2426
2427static int
2428slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2429{
2430 /* if we are about to throw, also stop waiting */
2431 return SvROK ((SV *)frame->data) && !CORO_THROW;
2432}
2433
2434static void
2435slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2436{
2437 AV *av = (AV *)SvRV (arg [0]);
2438
2439 if (SvIVX (AvARRAY (av)[0]))
2440 {
2441 SvIVX (AvARRAY (av)[0]) = 0;
2442 frame->prepare = prepare_nop;
2443 frame->check = slf_check_nop;
2444 }
2445 else
2446 {
2447 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2448
2449 av_push (av, waiter);
2450
2451 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2452 frame->prepare = prepare_schedule;
2453 frame->check = slf_check_signal_wait;
2454 }
2455}
2456
2457/*****************************************************************************/
2458/* Coro::AIO */
2459
2460#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2461
2462/* helper storage struct */
2463struct io_state
2464{
2465 int errorno;
2466 I32 laststype; /* U16 in 5.10.0 */
2467 int laststatval;
2468 Stat_t statcache;
2469};
2470
2471static void
2472coro_aio_callback (pTHX_ CV *cv)
2473{
2474 dXSARGS;
2475 AV *state = (AV *)GENSUB_ARG;
2476 SV *coro = av_pop (state);
2477 SV *data_sv = newSV (sizeof (struct io_state));
2478
2479 av_extend (state, items - 1);
2480
2481 sv_upgrade (data_sv, SVt_PV);
2482 SvCUR_set (data_sv, sizeof (struct io_state));
2483 SvPOK_only (data_sv);
2484
2485 {
2486 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2487
2488 data->errorno = errno;
2489 data->laststype = PL_laststype;
2490 data->laststatval = PL_laststatval;
2491 data->statcache = PL_statcache;
2492 }
2493
2494 /* now build the result vector out of all the parameters and the data_sv */
2495 {
2496 int i;
2497
2498 for (i = 0; i < items; ++i)
2499 av_push (state, SvREFCNT_inc_NN (ST (i)));
2500 }
2501
2502 av_push (state, data_sv);
2503
2504 api_ready (aTHX_ coro);
2505 SvREFCNT_dec (coro);
2506 SvREFCNT_dec ((AV *)state);
2507}
2508
2509static int
2510slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2511{
2512 AV *state = (AV *)frame->data;
2513
2514 /* if we are about to throw, return early */
2515 /* this does not cancel the aio request, but at least */
2516 /* it quickly returns */
2517 if (CORO_THROW)
2518 return 0;
2519
2520 /* one element that is an RV? repeat! */
2521 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2522 return 1;
2523
2524 /* restore status */
2525 {
2526 SV *data_sv = av_pop (state);
2527 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2528
2529 errno = data->errorno;
2530 PL_laststype = data->laststype;
2531 PL_laststatval = data->laststatval;
2532 PL_statcache = data->statcache;
2533
2534 SvREFCNT_dec (data_sv);
2535 }
2536
2537 /* push result values */
2538 {
2539 dSP;
2540 int i;
2541
2542 EXTEND (SP, AvFILLp (state) + 1);
2543 for (i = 0; i <= AvFILLp (state); ++i)
2544 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2545
2546 PUTBACK;
2547 }
2548
2549 return 0;
2550}
2551
2552static void
2553slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
2555 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2556 SV *coro_hv = SvRV (coro_current);
2557 struct coro *coro = SvSTATE_hv (coro_hv);
2558
2559 /* put our coroutine id on the state arg */
2560 av_push (state, SvREFCNT_inc_NN (coro_hv));
2561
2562 /* first see whether we have a non-zero priority and set it as AIO prio */
2563 if (coro->prio)
2564 {
2565 dSP;
2566
2567 static SV *prio_cv;
2568 static SV *prio_sv;
2569
2570 if (expect_false (!prio_cv))
2571 {
2572 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2573 prio_sv = newSViv (0);
2574 }
2575
2576 PUSHMARK (SP);
2577 sv_setiv (prio_sv, coro->prio);
2578 XPUSHs (prio_sv);
2579
2580 PUTBACK;
2581 call_sv (prio_cv, G_VOID | G_DISCARD);
2582 }
2583
2584 /* now call the original request */
2585 {
2586 dSP;
2587 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2588 int i;
2589
2590 PUSHMARK (SP);
2591
2592 /* first push all args to the stack */
2593 EXTEND (SP, items + 1);
2594
2595 for (i = 0; i < items; ++i)
2596 PUSHs (arg [i]);
2597
2598 /* now push the callback closure */
2599 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2600
2601 /* now call the AIO function - we assume our request is uncancelable */
2602 PUTBACK;
2603 call_sv ((SV *)req, G_VOID | G_DISCARD);
2604 }
2605
2606 /* now that the requets is going, we loop toll we have a result */
2607 frame->data = (void *)state;
2608 frame->prepare = prepare_schedule;
2609 frame->check = slf_check_aio_req;
2610}
2611
2612static void
2613coro_aio_req_xs (pTHX_ CV *cv)
2614{
2615 dXSARGS;
2616
2617 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2618
2619 XSRETURN_EMPTY;
2620}
2621
2622/*****************************************************************************/
2623
1052MODULE = Coro::State PACKAGE = Coro::State 2624MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1053 2625
1054PROTOTYPES: DISABLE 2626PROTOTYPES: DISABLE
1055 2627
1056BOOT: 2628BOOT:
1057{ 2629{
1058#ifdef USE_ITHREADS 2630#ifdef USE_ITHREADS
1059 MUTEX_INIT (&coro_mutex); 2631# if CORO_PTHREAD
2632 coro_thx = PERL_GET_CONTEXT;
2633# endif
1060#endif 2634#endif
1061 BOOT_PAGESIZE; 2635 BOOT_PAGESIZE;
1062 2636
2637 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2638 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2639
2640 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2641 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2642 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2643
2644 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2645 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2646 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2647
1063 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2648 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1064 2649
2650 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2651 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1065 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2652 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1066 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1067 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1068 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1069 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2653 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1070 2654
1071 main_mainstack = PL_mainstack; 2655 main_mainstack = PL_mainstack;
2656 main_top_env = PL_top_env;
1072 2657
2658 while (main_top_env->je_prev)
2659 main_top_env = main_top_env->je_prev;
2660
2661 {
2662 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2663
2664 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2665 hv_store_ent (PL_custom_op_names, slf,
2666 newSVpv ("coro_slf", 0), 0);
2667
2668 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2669 hv_store_ent (PL_custom_op_descs, slf,
2670 newSVpv ("coro schedule like function", 0), 0);
2671 }
2672
1073 coroapi.ver = CORO_API_VERSION; 2673 coroapi.ver = CORO_API_VERSION;
2674 coroapi.rev = CORO_API_REVISION;
2675
1074 coroapi.transfer = api_transfer; 2676 coroapi.transfer = api_transfer;
2677
2678 coroapi.sv_state = SvSTATE_;
2679 coroapi.execute_slf = api_execute_slf;
2680 coroapi.prepare_nop = prepare_nop;
2681 coroapi.prepare_schedule = prepare_schedule;
2682 coroapi.prepare_cede = prepare_cede;
2683 coroapi.prepare_cede_notself = prepare_cede_notself;
2684
2685 {
2686 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2687
2688 if (!svp) croak ("Time::HiRes is required");
2689 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2690
2691 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2692 }
1075 2693
1076 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2694 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1077} 2695}
1078 2696
1079SV * 2697SV *
1080new (char *klass, ...) 2698new (char *klass, ...)
2699 ALIAS:
2700 Coro::new = 1
1081 CODE: 2701 CODE:
1082{ 2702{
1083 struct coro *coro; 2703 struct coro *coro;
2704 MAGIC *mg;
1084 HV *hv; 2705 HV *hv;
2706 CV *cb;
1085 int i; 2707 int i;
1086 2708
2709 if (items > 1)
2710 {
2711 cb = coro_sv_2cv (aTHX_ ST (1));
2712
2713 if (!ix)
2714 {
2715 if (CvISXSUB (cb))
2716 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2717
2718 if (!CvROOT (cb))
2719 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2720 }
2721 }
2722
1087 Newz (0, coro, 1, struct coro); 2723 Newz (0, coro, 1, struct coro);
1088 coro->args = newAV (); 2724 coro->args = newAV ();
1089 coro->save = CORO_SAVE_ALL;
1090 coro->flags = CF_NEW; 2725 coro->flags = CF_NEW;
1091 2726
2727 if (coro_first) coro_first->prev = coro;
2728 coro->next = coro_first;
2729 coro_first = coro;
2730
1092 hv = newHV (); 2731 coro->hv = hv = newHV ();
1093 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2732 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2733 mg->mg_flags |= MGf_DUP;
1094 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2734 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1095 2735
2736 if (items > 1)
2737 {
2738 av_extend (coro->args, items - 1 + ix - 1);
2739
2740 if (ix)
2741 {
2742 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2743 cb = cv_coro_run;
2744 }
2745
2746 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2747
1096 for (i = 1; i < items; i++) 2748 for (i = 2; i < items; i++)
1097 av_push (coro->args, newSVsv (ST (i))); 2749 av_push (coro->args, newSVsv (ST (i)));
2750 }
1098} 2751}
1099 OUTPUT: 2752 OUTPUT:
1100 RETVAL 2753 RETVAL
1101 2754
1102int 2755void
1103save (SV *coro, int new_save = -1) 2756transfer (...)
2757 PROTOTYPE: $$
1104 CODE: 2758 CODE:
1105 RETVAL = api_save (coro, new_save); 2759 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2760
2761bool
2762_destroy (SV *coro_sv)
2763 CODE:
2764 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1106 OUTPUT: 2765 OUTPUT:
1107 RETVAL 2766 RETVAL
1108 2767
1109void 2768void
1110_set_stacklevel (...)
1111 ALIAS:
1112 Coro::State::transfer = 1
1113 Coro::schedule = 2
1114 Coro::cede = 3
1115 CODE:
1116{
1117 struct transfer_args ta;
1118
1119 switch (ix)
1120 {
1121 case 0:
1122 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1123 ta.next = 0;
1124 break;
1125
1126 case 1:
1127 if (items != 2)
1128 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1129
1130 prepare_transfer (&ta, ST (0), ST (1));
1131 break;
1132
1133 case 2:
1134 prepare_schedule (&ta);
1135 break;
1136
1137 case 3:
1138 prepare_cede (&ta);
1139 break;
1140 }
1141
1142 TRANSFER (ta);
1143}
1144
1145void
1146_clone_state_from (SV *dst, SV *src)
1147 CODE:
1148{
1149 struct coro *coro_src = SvSTATE (src);
1150
1151 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1152
1153 ++coro_src->refcnt;
1154 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1155}
1156
1157void
1158_exit (code) 2769_exit (int code)
1159 int code
1160 PROTOTYPE: $ 2770 PROTOTYPE: $
1161 CODE: 2771 CODE:
1162 _exit (code); 2772 _exit (code);
1163 2773
1164int 2774int
2775cctx_stacksize (int new_stacksize = 0)
2776 PROTOTYPE: ;$
2777 CODE:
2778 RETVAL = cctx_stacksize;
2779 if (new_stacksize)
2780 {
2781 cctx_stacksize = new_stacksize;
2782 ++cctx_gen;
2783 }
2784 OUTPUT:
2785 RETVAL
2786
2787int
2788cctx_max_idle (int max_idle = 0)
2789 PROTOTYPE: ;$
2790 CODE:
2791 RETVAL = cctx_max_idle;
2792 if (max_idle > 1)
2793 cctx_max_idle = max_idle;
2794 OUTPUT:
2795 RETVAL
2796
2797int
1165cctx_count () 2798cctx_count ()
2799 PROTOTYPE:
1166 CODE: 2800 CODE:
1167 RETVAL = cctx_count; 2801 RETVAL = cctx_count;
1168 OUTPUT: 2802 OUTPUT:
1169 RETVAL 2803 RETVAL
1170 2804
1171int 2805int
1172cctx_idle () 2806cctx_idle ()
2807 PROTOTYPE:
1173 CODE: 2808 CODE:
1174 RETVAL = cctx_idle; 2809 RETVAL = cctx_idle;
1175 OUTPUT: 2810 OUTPUT:
1176 RETVAL 2811 RETVAL
1177 2812
2813void
2814list ()
2815 PROTOTYPE:
2816 PPCODE:
2817{
2818 struct coro *coro;
2819 for (coro = coro_first; coro; coro = coro->next)
2820 if (coro->hv)
2821 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2822}
2823
2824void
2825call (Coro::State coro, SV *coderef)
2826 ALIAS:
2827 eval = 1
2828 CODE:
2829{
2830 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2831 {
2832 struct coro temp;
2833
2834 if (!(coro->flags & CF_RUNNING))
2835 {
2836 PUTBACK;
2837 save_perl (aTHX_ &temp);
2838 load_perl (aTHX_ coro);
2839 }
2840
2841 {
2842 dSP;
2843 ENTER;
2844 SAVETMPS;
2845 PUTBACK;
2846 PUSHSTACK;
2847 PUSHMARK (SP);
2848
2849 if (ix)
2850 eval_sv (coderef, 0);
2851 else
2852 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2853
2854 POPSTACK;
2855 SPAGAIN;
2856 FREETMPS;
2857 LEAVE;
2858 PUTBACK;
2859 }
2860
2861 if (!(coro->flags & CF_RUNNING))
2862 {
2863 save_perl (aTHX_ coro);
2864 load_perl (aTHX_ &temp);
2865 SPAGAIN;
2866 }
2867 }
2868}
2869
2870SV *
2871is_ready (Coro::State coro)
2872 PROTOTYPE: $
2873 ALIAS:
2874 is_ready = CF_READY
2875 is_running = CF_RUNNING
2876 is_new = CF_NEW
2877 is_destroyed = CF_DESTROYED
2878 CODE:
2879 RETVAL = boolSV (coro->flags & ix);
2880 OUTPUT:
2881 RETVAL
2882
2883void
2884throw (Coro::State self, SV *throw = &PL_sv_undef)
2885 PROTOTYPE: $;$
2886 CODE:
2887{
2888 struct coro *current = SvSTATE_current;
2889 SV **throwp = self == current ? &CORO_THROW : &self->except;
2890 SvREFCNT_dec (*throwp);
2891 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2892}
2893
2894void
2895api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2896 PROTOTYPE: $;$
2897 C_ARGS: aTHX_ coro, flags
2898
2899SV *
2900has_cctx (Coro::State coro)
2901 PROTOTYPE: $
2902 CODE:
2903 RETVAL = boolSV (!!coro->cctx);
2904 OUTPUT:
2905 RETVAL
2906
2907int
2908is_traced (Coro::State coro)
2909 PROTOTYPE: $
2910 CODE:
2911 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2912 OUTPUT:
2913 RETVAL
2914
2915UV
2916rss (Coro::State coro)
2917 PROTOTYPE: $
2918 ALIAS:
2919 usecount = 1
2920 CODE:
2921 switch (ix)
2922 {
2923 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2924 case 1: RETVAL = coro->usecount; break;
2925 }
2926 OUTPUT:
2927 RETVAL
2928
2929void
2930force_cctx ()
2931 PROTOTYPE:
2932 CODE:
2933 SvSTATE_current->cctx->idle_sp = 0;
2934
2935void
2936swap_defsv (Coro::State self)
2937 PROTOTYPE: $
2938 ALIAS:
2939 swap_defav = 1
2940 CODE:
2941 if (!self->slot)
2942 croak ("cannot swap state with coroutine that has no saved state,");
2943 else
2944 {
2945 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2946 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2947
2948 SV *tmp = *src; *src = *dst; *dst = tmp;
2949 }
2950
2951
1178MODULE = Coro::State PACKAGE = Coro 2952MODULE = Coro::State PACKAGE = Coro
1179 2953
1180BOOT: 2954BOOT:
1181{ 2955{
1182 int i; 2956 int i;
1183 2957
2958 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2959 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2960 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2961 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2962 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
2963 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
2964
2965 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2966 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2967 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
2968 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
2969
1184 coro_stash = gv_stashpv ("Coro", TRUE); 2970 coro_stash = gv_stashpv ("Coro", TRUE);
1185 2971
1186 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2972 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1187 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2973 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1188 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2974 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1189 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2975 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1190 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2976 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1191 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2977 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1192 2978
1193 coro_current = get_sv ("Coro::current", FALSE);
1194 SvREADONLY_on (coro_current);
1195
1196 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2979 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1197 coro_ready[i] = newAV (); 2980 coro_ready[i] = newAV ();
1198 2981
1199 { 2982 {
1200 SV *sv = perl_get_sv("Coro::API", 1); 2983 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1201 2984
1202 coroapi.schedule = api_schedule; 2985 coroapi.schedule = api_schedule;
1203 coroapi.save = api_save;
1204 coroapi.cede = api_cede; 2986 coroapi.cede = api_cede;
2987 coroapi.cede_notself = api_cede_notself;
1205 coroapi.ready = api_ready; 2988 coroapi.ready = api_ready;
1206 coroapi.is_ready = api_is_ready; 2989 coroapi.is_ready = api_is_ready;
1207 coroapi.nready = &coro_nready; 2990 coroapi.nready = coro_nready;
1208 coroapi.current = coro_current; 2991 coroapi.current = coro_current;
1209 2992
1210 GCoroAPI = &coroapi; 2993 /*GCoroAPI = &coroapi;*/
1211 sv_setiv (sv, (IV)&coroapi); 2994 sv_setiv (sv, (IV)&coroapi);
1212 SvREADONLY_on (sv); 2995 SvREADONLY_on (sv);
1213 } 2996 }
1214} 2997}
2998
2999void
3000schedule (...)
3001 CODE:
3002 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3003
3004void
3005cede (...)
3006 CODE:
3007 CORO_EXECUTE_SLF_XS (slf_init_cede);
3008
3009void
3010cede_notself (...)
3011 CODE:
3012 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1215 3013
1216void 3014void
1217_set_current (SV *current) 3015_set_current (SV *current)
1218 PROTOTYPE: $ 3016 PROTOTYPE: $
1219 CODE: 3017 CODE:
1220 SvREFCNT_dec (SvRV (coro_current)); 3018 SvREFCNT_dec (SvRV (coro_current));
1221 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3019 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3020
3021void
3022_set_readyhook (SV *hook)
3023 PROTOTYPE: $
3024 CODE:
3025 SvREFCNT_dec (coro_readyhook);
3026 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1222 3027
1223int 3028int
1224prio (Coro::State coro, int newprio = 0) 3029prio (Coro::State coro, int newprio = 0)
3030 PROTOTYPE: $;$
1225 ALIAS: 3031 ALIAS:
1226 nice = 1 3032 nice = 1
1227 CODE: 3033 CODE:
1228{ 3034{
1229 RETVAL = coro->prio; 3035 RETVAL = coro->prio;
1230 3036
1231 if (items > 1) 3037 if (items > 1)
1232 { 3038 {
1233 if (ix) 3039 if (ix)
1234 newprio += coro->prio; 3040 newprio = coro->prio - newprio;
1235 3041
1236 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3042 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1237 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3043 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1238 3044
1239 coro->prio = newprio; 3045 coro->prio = newprio;
1240 } 3046 }
1241} 3047}
3048 OUTPUT:
3049 RETVAL
1242 3050
1243SV * 3051SV *
1244ready (SV *self) 3052ready (SV *self)
1245 PROTOTYPE: $ 3053 PROTOTYPE: $
1246 CODE: 3054 CODE:
1247 RETVAL = boolSV (api_ready (self)); 3055 RETVAL = boolSV (api_ready (aTHX_ self));
1248 OUTPUT:
1249 RETVAL
1250
1251SV *
1252is_ready (SV *self)
1253 PROTOTYPE: $
1254 CODE:
1255 RETVAL = boolSV (api_is_ready (self));
1256 OUTPUT: 3056 OUTPUT:
1257 RETVAL 3057 RETVAL
1258 3058
1259int 3059int
1260nready (...) 3060nready (...)
… …
1262 CODE: 3062 CODE:
1263 RETVAL = coro_nready; 3063 RETVAL = coro_nready;
1264 OUTPUT: 3064 OUTPUT:
1265 RETVAL 3065 RETVAL
1266 3066
1267MODULE = Coro::State PACKAGE = Coro::AIO 3067void
3068_pool_handler (...)
3069 CODE:
3070 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3071
3072void
3073async_pool (SV *cv, ...)
3074 PROTOTYPE: &@
3075 PPCODE:
3076{
3077 HV *hv = (HV *)av_pop (av_async_pool);
3078 AV *av = newAV ();
3079 SV *cb = ST (0);
3080 int i;
3081
3082 av_extend (av, items - 2);
3083 for (i = 1; i < items; ++i)
3084 av_push (av, SvREFCNT_inc_NN (ST (i)));
3085
3086 if ((SV *)hv == &PL_sv_undef)
3087 {
3088 PUSHMARK (SP);
3089 EXTEND (SP, 2);
3090 PUSHs (sv_Coro);
3091 PUSHs ((SV *)cv_pool_handler);
3092 PUTBACK;
3093 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3094 SPAGAIN;
3095
3096 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3097 }
3098
3099 {
3100 struct coro *coro = SvSTATE_hv (hv);
3101
3102 assert (!coro->invoke_cb);
3103 assert (!coro->invoke_av);
3104 coro->invoke_cb = SvREFCNT_inc (cb);
3105 coro->invoke_av = av;
3106 }
3107
3108 api_ready (aTHX_ (SV *)hv);
3109
3110 if (GIMME_V != G_VOID)
3111 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3112 else
3113 SvREFCNT_dec (hv);
3114}
1268 3115
1269SV * 3116SV *
1270_get_state () 3117rouse_cb ()
3118 PROTOTYPE:
1271 CODE: 3119 CODE:
1272{ 3120 RETVAL = coro_new_rouse_cb (aTHX);
1273 struct io_state *data;
1274
1275 RETVAL = newSV (sizeof (struct io_state));
1276 data = (struct io_state *)SvPVX (RETVAL);
1277 SvCUR_set (RETVAL, sizeof (struct io_state));
1278 SvPOK_only (RETVAL);
1279
1280 data->errorno = errno;
1281 data->laststype = PL_laststype;
1282 data->laststatval = PL_laststatval;
1283 data->statcache = PL_statcache;
1284}
1285 OUTPUT: 3121 OUTPUT:
1286 RETVAL 3122 RETVAL
1287 3123
1288void 3124void
1289_set_state (char *data_) 3125rouse_wait (...)
1290 PROTOTYPE: $ 3126 PROTOTYPE: ;$
3127 PPCODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3129
3130
3131MODULE = Coro::State PACKAGE = PerlIO::cede
3132
3133BOOT:
3134 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3135
3136
3137MODULE = Coro::State PACKAGE = Coro::Semaphore
3138
3139SV *
3140new (SV *klass, SV *count = 0)
1291 CODE: 3141 CODE:
1292{ 3142 RETVAL = sv_bless (
1293 struct io_state *data = (void *)data_; 3143 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3144 GvSTASH (CvGV (cv))
3145 );
3146 OUTPUT:
3147 RETVAL
1294 3148
1295 errno = data->errorno; 3149# helper for Coro::Channel
1296 PL_laststype = data->laststype; 3150SV *
1297 PL_laststatval = data->laststatval; 3151_alloc (int count)
1298 PL_statcache = data->statcache; 3152 CODE:
1299} 3153 RETVAL = coro_waitarray_new (aTHX_ count);
3154 OUTPUT:
3155 RETVAL
1300 3156
3157SV *
3158count (SV *self)
3159 CODE:
3160 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3161 OUTPUT:
3162 RETVAL
3163
3164void
3165up (SV *self, int adjust = 1)
3166 ALIAS:
3167 adjust = 1
3168 CODE:
3169 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3170
3171void
3172down (...)
3173 CODE:
3174 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3175
3176void
3177wait (...)
3178 CODE:
3179 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3180
3181void
3182try (SV *self)
3183 PPCODE:
3184{
3185 AV *av = (AV *)SvRV (self);
3186 SV *count_sv = AvARRAY (av)[0];
3187 IV count = SvIVX (count_sv);
3188
3189 if (count > 0)
3190 {
3191 --count;
3192 SvIVX (count_sv) = count;
3193 XSRETURN_YES;
3194 }
3195 else
3196 XSRETURN_NO;
3197}
3198
3199void
3200waiters (SV *self)
3201 PPCODE:
3202{
3203 AV *av = (AV *)SvRV (self);
3204 int wcount = AvFILLp (av) + 1 - 1;
3205
3206 if (GIMME_V == G_SCALAR)
3207 XPUSHs (sv_2mortal (newSViv (wcount)));
3208 else
3209 {
3210 int i;
3211 EXTEND (SP, wcount);
3212 for (i = 1; i <= wcount; ++i)
3213 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3214 }
3215}
3216
3217MODULE = Coro::State PACKAGE = Coro::Signal
3218
3219SV *
3220new (SV *klass)
3221 CODE:
3222 RETVAL = sv_bless (
3223 coro_waitarray_new (aTHX_ 0),
3224 GvSTASH (CvGV (cv))
3225 );
3226 OUTPUT:
3227 RETVAL
3228
3229void
3230wait (...)
3231 CODE:
3232 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3233
3234void
3235broadcast (SV *self)
3236 CODE:
3237{
3238 AV *av = (AV *)SvRV (self);
3239 coro_signal_wake (aTHX_ av, AvFILLp (av));
3240}
3241
3242void
3243send (SV *self)
3244 CODE:
3245{
3246 AV *av = (AV *)SvRV (self);
3247
3248 if (AvFILLp (av))
3249 coro_signal_wake (aTHX_ av, 1);
3250 else
3251 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3252}
3253
3254IV
3255awaited (SV *self)
3256 CODE:
3257 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3258 OUTPUT:
3259 RETVAL
3260
3261
3262MODULE = Coro::State PACKAGE = Coro::AnyEvent
3263
3264BOOT:
3265 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3266
3267void
3268_schedule (...)
3269 CODE:
3270{
3271 static int incede;
3272
3273 api_cede_notself (aTHX);
3274
3275 ++incede;
3276 while (coro_nready >= incede && api_cede (aTHX))
3277 ;
3278
3279 sv_setsv (sv_activity, &PL_sv_undef);
3280 if (coro_nready >= incede)
3281 {
3282 PUSHMARK (SP);
3283 PUTBACK;
3284 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3285 }
3286
3287 --incede;
3288}
3289
3290
3291MODULE = Coro::State PACKAGE = Coro::AIO
3292
3293void
3294_register (char *target, char *proto, SV *req)
3295 CODE:
3296{
3297 CV *req_cv = coro_sv_2cv (aTHX_ req);
3298 /* newXSproto doesn't return the CV on 5.8 */
3299 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3300 sv_setpv ((SV *)slf_cv, proto);
3301 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3302}
3303

Diff Legend

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