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Comparing Coro/Coro/State.xs (file contents):
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs.
Revision 1.294 by root, Tue Nov 18 08:31:03 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 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
45#include <assert.h> 15#include <assert.h>
46 16
47#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
48# undef STACKGUARD 18# undef setjmp
49#endif 19# undef longjmp
50 20# undef _exit
51#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
52# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
53#endif 24#endif
54 25
55#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
56# include <unistd.h> 27# include <unistd.h>
57# include <sys/mman.h> 28# include <sys/mman.h>
… …
73#else 44#else
74# define PAGESIZE 0 45# define PAGESIZE 0
75# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
76#endif 47#endif
77 48
78/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
79 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
80 * 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) && PERLSUBVERSION >= (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
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
81#define dSTACKLEVEL int stacklevel 125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
82#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
83 131
84#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
85 133
86#if __GNUC__ >= 3 134#if __GNUC__ >= 3
87# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
88#else 138#else
89# define attribute(x) 139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
90#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
91 146
92#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
93 148
94#include "CoroAPI.h" 149#include "CoroAPI.h"
95 150
96#ifdef USE_ITHREADS 151#ifdef USE_ITHREADS
97static perl_mutex coro_mutex; 152# if CORO_PTHREAD
98# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 153static void *coro_thx;
99# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
100#else
101# define LOCK (void)0
102# define UNLOCK (void)0
103#endif 154# endif
155#endif
104 156
105struct io_state 157static double (*nvtime)(); /* so why doesn't it take void? */
106{
107 int errorno;
108 I32 laststype;
109 int laststatval;
110 Stat_t statcache;
111};
112 158
159/* we hijack an hopefully unused CV flag for our purposes */
160#define CVf_SLF 0x4000
161static OP *pp_slf (pTHX);
162
163static U32 cctx_gen;
164static size_t cctx_stacksize = CORO_STACKSIZE;
113static struct CoroAPI coroapi; 165static struct CoroAPI coroapi;
114static AV *main_mainstack; /* used to differentiate between $main and others */ 166static AV *main_mainstack; /* used to differentiate between $main and others */
167static JMPENV *main_top_env;
115static HV *coro_state_stash, *coro_stash; 168static HV *coro_state_stash, *coro_stash;
116static SV *coro_mortal; /* will be freed after next transfer */ 169static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
170
171static GV *irsgv; /* $/ */
172static GV *stdoutgv; /* *STDOUT */
173static SV *rv_diehook;
174static SV *rv_warnhook;
175static HV *hv_sig; /* %SIG */
176
177/* async_pool helper stuff */
178static SV *sv_pool_rss;
179static SV *sv_pool_size;
180static AV *av_async_pool;
181
182/* Coro::AnyEvent */
183static SV *sv_activity;
117 184
118static struct coro_cctx *cctx_first; 185static struct coro_cctx *cctx_first;
119static int cctx_count, cctx_idle; 186static int cctx_count, cctx_idle;
120 187
188enum {
189 CC_MAPPED = 0x01,
190 CC_NOREUSE = 0x02, /* throw this away after tracing */
191 CC_TRACE = 0x04,
192 CC_TRACE_SUB = 0x08, /* trace sub calls */
193 CC_TRACE_LINE = 0x10, /* trace each statement */
194 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
195};
196
121/* this is a structure representing a c-level coroutine */ 197/* this is a structure representing a c-level coroutine */
122typedef struct coro_cctx { 198typedef struct coro_cctx
199{
123 struct coro_cctx *next; 200 struct coro_cctx *next;
124 201
125 /* the stack */ 202 /* the stack */
126 void *sptr; 203 void *sptr;
127 long ssize; /* positive == mmap, otherwise malloc */ 204 size_t ssize;
128 205
129 /* cpu state */ 206 /* cpu state */
130 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
131 JMPENV *top_env; 209 JMPENV *top_env;
132 coro_context cctx; 210 coro_context cctx;
133 211
134 int inuse; 212 U32 gen;
135
136#if USE_VALGRIND 213#if CORO_USE_VALGRIND
137 int valgrind_id; 214 int valgrind_id;
138#endif 215#endif
216 unsigned char flags;
139} coro_cctx; 217} coro_cctx;
140 218
141enum { 219enum {
142 CF_RUNNING = 0x0001, /* coroutine is running */ 220 CF_RUNNING = 0x0001, /* coroutine is running */
143 CF_READY = 0x0002, /* coroutine is ready */ 221 CF_READY = 0x0002, /* coroutine is ready */
144 CF_NEW = 0x0004, /* ahs never been switched to */ 222 CF_NEW = 0x0004, /* has never been switched to */
223 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
145}; 224};
146 225
147/* this is a structure representing a perl-level coroutine */ 226/* the structure where most of the perl state is stored, overlaid on the cxstack */
148struct coro { 227typedef struct
149 /* the c coroutine allocated to this perl coroutine, if any */ 228{
150 coro_cctx *cctx; 229 SV *defsv;
151 230 AV *defav;
152 /* data associated with this coroutine (initial args) */ 231 SV *errsv;
153 AV *args; 232 SV *irsgv;
154 int refcnt;
155 int save; /* CORO_SAVE flags */
156 int flags; /* CF_ flags */
157
158 /* optionally saved, might be zero */
159 AV *defav; /* @_ */
160 SV *defsv; /* $_ */
161 SV *errsv; /* $@ */
162 SV *irssv; /* $/ */
163 SV *irssv_sv; /* real $/ cache */
164
165#define VAR(name,type) type name; 233#define VAR(name,type) type name;
166# include "state.h" 234# include "state.h"
167#undef VAR 235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239
240/* this is a structure representing a perl-level coroutine */
241struct coro {
242 /* the C coroutine allocated to this perl coroutine, if any */
243 coro_cctx *cctx;
244
245 /* state data */
246 struct CoroSLF slf_frame; /* saved slf frame */
247 AV *mainstack;
248 perl_slots *slot; /* basically the saved sp */
249
250 AV *args; /* data associated with this coroutine (initial args) */
251 int refcnt; /* coroutines are refcounted, yes */
252 int flags; /* CF_ flags */
253 HV *hv; /* the perl hash associated with this coro, if any */
254 void (*on_destroy)(pTHX_ struct coro *coro);
255
256 /* statistics */
257 int usecount; /* number of transfers to this coro */
168 258
169 /* coro process data */ 259 /* coro process data */
170 int prio; 260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
171}; 268};
172 269
173typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
174typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
175 272
273/* the following variables are effectively part of the perl context */
274/* and get copied between struct coro and these variables */
275/* the mainr easonw e don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
277static SV *coro_throw;
278
279/** Coro ********************************************************************/
280
281#define PRIO_MAX 3
282#define PRIO_HIGH 1
283#define PRIO_NORMAL 0
284#define PRIO_LOW -1
285#define PRIO_IDLE -3
286#define PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
176static AV * 307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
326
327static AV *
177coro_clone_padlist (CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
178{ 329{
179 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
180 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
181 332
182 newpadlist = newAV (); 333 newpadlist = newAV ();
183 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
184#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
185 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
186#else 337#else
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
188#endif 339#endif
189 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
190 --AvFILLp (padlist); 341 --AvFILLp (padlist);
191 342
192 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
193 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
194 345
195 return newpadlist; 346 return newpadlist;
196} 347}
197 348
198static void 349static void
199free_padlist (AV *padlist) 350free_padlist (pTHX_ AV *padlist)
200{ 351{
201 /* may be during global destruction */ 352 /* may be during global destruction */
202 if (SvREFCNT (padlist)) 353 if (SvREFCNT (padlist))
203 { 354 {
204 I32 i = AvFILLp (padlist); 355 I32 i = AvFILLp (padlist);
… …
225 AV *padlist; 376 AV *padlist;
226 AV *av = (AV *)mg->mg_obj; 377 AV *av = (AV *)mg->mg_obj;
227 378
228 /* casting is fun. */ 379 /* casting is fun. */
229 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
230 free_padlist (padlist); 381 free_padlist (aTHX_ padlist);
231 382
232 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
233 384
234 return 0; 385 return 0;
235} 386}
236 387
388#define CORO_MAGIC_type_cv 26
237#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
238 390
239static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
240 395
241#define CORO_MAGIC(cv) \ 396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
242 SvMAGIC (cv) \ 398 ? SvMAGIC (sv) \
243 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 : mg_find (sv, type))
244 ? SvMAGIC (cv) \ 400
245 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
246 : 0 404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
247 438
248/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
249static void 440static void
250get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
251{ 442{
252 MAGIC *mg = CORO_MAGIC (cv); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
253 AV *av; 444 AV *av;
254 445
255 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
256 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257 else 448 else
258 { 449 {
259#if 0 450#if CORO_PREFER_PERL_FUNCTIONS
260 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
261 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
262 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
263 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
264 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
265#else 457#else
266 CvPADLIST (cv) = coro_clone_padlist (cv); 458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
267#endif 459#endif
268 } 460 }
269} 461}
270 462
271static void 463static void
272put_padlist (CV *cv) 464put_padlist (pTHX_ CV *cv)
273{ 465{
274 MAGIC *mg = CORO_MAGIC (cv); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
275 AV *av; 467 AV *av;
276 468
277 if (!mg) 469 if (expect_false (!mg))
278 { 470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
279 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
280 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
281 mg->mg_virtual = &vtbl_coro;
282 mg->mg_obj = (SV *)newAV ();
283 }
284 471
285 av = (AV *)mg->mg_obj; 472 av = (AV *)mg->mg_obj;
286 473
287 if (AvFILLp (av) >= AvMAX (av)) 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
288 av_extend (av, AvMAX (av) + 1); 475 av_extend (av, AvMAX (av) + 1);
289 476
290 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291} 478}
292 479
293#define SB do { 480/** load & save, init *******************************************************/
294#define SE } while (0)
295 481
296#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
297
298static void 482static void
299load_perl (Coro__State c) 483load_perl (pTHX_ Coro__State c)
300{ 484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
301#define VAR(name,type) PL_ ## name = c->name; 495 #define VAR(name,type) PL_ ## name = slot->name;
302# include "state.h" 496 # include "state.h"
303#undef VAR 497 #undef VAR
304
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
308 if (c->irssv)
309 {
310 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
311 SvREFCNT_dec (c->irssv);
312 else
313 {
314 REPLACE_SV (PL_rs, c->irssv);
315 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
316 sv_setsv (c->irssv_sv, PL_rs);
317 }
318 }
319 498
320 { 499 {
321 dSP; 500 dSP;
501
322 CV *cv; 502 CV *cv;
323 503
324 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
325 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
326 { 506 {
327 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
328 CvDEPTH (cv) = PTR2IV (POPs); 508 CvDEPTH (cv) = PTR2IV (POPs);
329 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
330 } 510 }
331 511
332 PUTBACK; 512 PUTBACK;
333 } 513 }
334}
335 514
515 slf_frame = c->slf_frame;
516 coro_throw = c->throw;
517}
518
336static void 519static void
337save_perl (Coro__State c) 520save_perl (pTHX_ Coro__State c)
338{ 521{
522 c->throw = coro_throw;
523 c->slf_frame = slf_frame;
524
339 { 525 {
340 dSP; 526 dSP;
341 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 531 /*
346 * the worst thing you can imagine happens first - we have to save 532 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 533 * (and reinitialize) all cv's in the whole callchain :(
348 */ 534 */
349 535
350 PUSHs (Nullsv); 536 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
352 for (;;) 538 for (;;)
353 { 539 {
354 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
355 { 541 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
357 543
358 if (CxTYPE (cx) == CXt_SUB) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
359 { 545 {
360 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
361 547
362 if (CvDEPTH (cv)) 548 if (expect_true (CvDEPTH (cv)))
363 { 549 {
364 EXTEND (SP, 3); 550 EXTEND (SP, 3);
365
366 PUSHs ((SV *)CvPADLIST (cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
367 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
369 554
370 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
371 get_padlist (cv); 556 get_padlist (aTHX_ cv);
372 } 557 }
373 } 558 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE (cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 559 }
383 560
384 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 562 break;
386 563
387 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
390 } 567 }
391 568
392 PUTBACK; 569 PUTBACK;
393 } 570 }
394 571
395 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
396 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
398 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
589 slot->defav = GvAV (PL_defgv);
590 slot->defsv = DEFSV;
591 slot->errsv = ERRSV;
592 slot->irsgv = GvSV (irsgv);
593
400#define VAR(name,type)c->name = PL_ ## name; 594 #define VAR(name,type) slot->name = PL_ ## name;
401# include "state.h" 595 # include "state.h"
402#undef VAR 596 #undef VAR
597 }
403} 598}
404 599
405/* 600/*
406 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
407 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
408 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
409 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
410 */ 605 */
606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
411static void 609static void
412coro_init_stacks () 610coro_init_stacks (pTHX)
413{ 611{
414 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 612 PL_curstackinfo = new_stackinfo(32, 8);
415 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
416 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
417 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
418 616
419 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
420 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
421 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
422 620
423 New(50,PL_tmps_stack,128,SV*); 621 New(50,PL_tmps_stack,32,SV*);
424 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
425 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
426 PL_tmps_max = 128; 624 PL_tmps_max = 32;
427 625
428 New(54,PL_markstack,32,I32); 626 New(54,PL_markstack,16,I32);
429 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
430 PL_markstack_max = PL_markstack + 32; 628 PL_markstack_max = PL_markstack + 16;
431 629
432#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
433 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
434#endif 632#endif
435 633
436 New(54,PL_scopestack,32,I32); 634 New(54,PL_scopestack,8,I32);
437 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
438 PL_scopestack_max = 32; 636 PL_scopestack_max = 8;
439 637
440 New(54,PL_savestack,64,ANY); 638 New(54,PL_savestack,24,ANY);
441 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
442 PL_savestack_max = 64; 640 PL_savestack_max = 24;
443 641
444#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
445 New(54,PL_retstack,16,OP*); 643 New(54,PL_retstack,4,OP*);
446 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
447 PL_retstack_max = 16; 645 PL_retstack_max = 4;
448#endif 646#endif
449} 647}
648#endif
450 649
451/* 650/*
452 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
453 */ 652 */
454static void 653static void
455coro_destroy_stacks () 654coro_destruct_stacks (pTHX)
456{ 655{
457 if (!IN_DESTRUCT)
458 {
459 /* is this ugly, I ask? */
460 LEAVE_SCOPE (0);
461
462 /* sure it is, but more important: is it correct?? :/ */
463 FREETMPS;
464
465 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
466 }
467
468 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
469 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
470 658
471 while (PL_curstackinfo) 659 while (PL_curstackinfo)
472 { 660 {
473 PERL_SI *p = PL_curstackinfo->si_prev; 661 PERL_SI *p = PL_curstackinfo->si_prev;
474 662
475 { /*D*//*remove*/
476 dSP;
477 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
478 PUTBACK; /* possibly superfluous */
479 }
480
481 if (!IN_DESTRUCT) 663 if (!IN_DESTRUCT)
482 {
483 dounwind (-1);/*D*//*remove*/
484 SvREFCNT_dec (PL_curstackinfo->si_stack); 664 SvREFCNT_dec (PL_curstackinfo->si_stack);
485 }
486 665
487 Safefree (PL_curstackinfo->si_cxstack); 666 Safefree (PL_curstackinfo->si_cxstack);
488 Safefree (PL_curstackinfo); 667 Safefree (PL_curstackinfo);
489 PL_curstackinfo = p; 668 PL_curstackinfo = p;
490 } 669 }
491 670
492 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
493 Safefree (PL_markstack); 672 Safefree (PL_markstack);
494 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
495 Safefree (PL_savestack); 674 Safefree (PL_savestack);
496#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
497 Safefree (PL_retstack); 676 Safefree (PL_retstack);
498#endif 677#endif
499} 678}
500 679
680static size_t
681coro_rss (pTHX_ struct coro *coro)
682{
683 size_t rss = sizeof (*coro);
684
685 if (coro->mainstack)
686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
690 if (coro->flags & CF_RUNNING)
691 {
692 slot = &tmp_slot;
693
694 #define VAR(name,type) slot->name = PL_ ## name;
695 # include "state.h"
696 #undef VAR
697 }
698 else
699 slot = coro->slot;
700
701 if (slot)
702 {
703 rss += sizeof (slot->curstackinfo);
704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
706 rss += slot->tmps_max * sizeof (SV *);
707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
708 rss += slot->scopestack_max * sizeof (I32);
709 rss += slot->savestack_max * sizeof (ANY);
710
711#if !PERL_VERSION_ATLEAST (5,10,0)
712 rss += slot->retstack_max * sizeof (OP *);
713#endif
714 }
715 }
716
717 return rss;
718}
719
720/** coroutine stack handling ************************************************/
721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
501static void 742static int
502setup_coro (struct coro *coro) 743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro)
503{ 829{
504 /* 830 /*
505 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
506 */ 832 */
507
508 coro_init_stacks (); 833 coro_init_stacks (aTHX);
509 834
835 PL_runops = RUNOPS_DEFAULT;
510 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
511 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
512 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
513 PL_localizing = 0; 841 PL_localizing = 0;
514 PL_dirty = 0; 842 PL_dirty = 0;
515 PL_restartop = 0; 843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
516 858
517 { 859 {
518 dSP; 860 dSP;
519 LOGOP myop; 861 UNOP myop;
520 862
521 SvREFCNT_dec (GvAV (PL_defgv));
522 GvAV (PL_defgv) = coro->args; coro->args = 0;
523
524 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
525 myop.op_next = Nullop; 864 myop.op_next = Nullop;
526 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
527 866
528 PUSHMARK (SP); 867 PUSHMARK (SP);
529 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
530 PUTBACK; 869 PUTBACK;
531 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
532 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
533 SPAGAIN; 872 SPAGAIN;
534 } 873 }
535 874
536 ENTER; /* necessary e.g. for dounwind */ 875 /* this newly created coroutine might be run on an existing cctx which most
537} 876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
538 880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 coro_throw = coro->throw;
891}
892
539static void 893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro_throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
540free_coro_mortal () 930free_coro_mortal (pTHX)
541{ 931{
542 if (coro_mortal) 932 if (expect_true (coro_mortal))
543 { 933 {
544 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
545 coro_mortal = 0; 935 coro_mortal = 0;
546 } 936 }
547} 937}
548 938
549/* inject a fake call to Coro::State::_cctx_init into the execution */ 939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
550static void NOINLINE 1082static void NOINLINE
551prepare_cctx (coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
552{ 1084{
553 dSP;
554 LOGOP myop;
555
556 Zero (&myop, 1, LOGOP);
557 myop.op_next = PL_op;
558 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559
560 PUSHMARK (SP);
561 EXTEND (SP, 2);
562 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
563 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
564 PUTBACK;
565 PL_op = (OP *)&myop;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567 SPAGAIN;
568}
569
570static void
571coro_run (void *arg)
572{
573 /* coro_run is the alternative tail of transfer(), so unlock here. */
574 UNLOCK;
575
576 /*
577 * this is a _very_ stripped down perl interpreter ;)
578 */
579 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
580 1086
1087 if (cctx->flags & CC_TRACE)
1088 PL_runops = runops_trace;
1089
1090 /* we already must be executing an SLF op, there is no other valid way
1091 * that can lead to creation of a new cctx */
1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1094
1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1096 cctx_ssl_cctx = cctx;
1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
581 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
582 prepare_cctx ((coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
583 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
584 /* somebody will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
585 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
586 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
587 1137
588 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1138 /*
589 abort (); 1139 * If perl-run returns we assume exit() was being called or the coro
1140 * fell off the end, which seems to be the only valid (non-bug)
1141 * reason for perl_run to return. We try to exit by jumping to the
1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1143 * coroutine as Coro has no such concept
1144 */
1145 PL_top_env = main_top_env;
1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
590} 1148}
591 1149
592static coro_cctx * 1150static coro_cctx *
593cctx_new () 1151cctx_new ()
594{ 1152{
595 coro_cctx *cctx; 1153 coro_cctx *cctx;
596 1154
597 ++cctx_count; 1155 ++cctx_count;
598
599 Newz (0, cctx, 1, coro_cctx); 1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182 void *stack_start;
1183 size_t stack_size;
600 1184
601#if HAVE_MMAP 1185#if HAVE_MMAP
602
603 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
604 /* mmap supposedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
605 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606 1189
607 if (cctx->sptr == (void *)-1) 1190 if (cctx->sptr != (void *)-1)
1191 {
1192 #if CORO_STACKGUARD
1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1194 #endif
1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1197 cctx->flags |= CC_MAPPED;
608 { 1198 }
1199 else
1200#endif
1201 {
1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1203 New (0, cctx->sptr, cctx_stacksize, long);
1204
1205 if (!cctx->sptr)
1206 {
609 perror ("FATAL: unable to mmap stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
610 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
611 } 1209 }
612 1210
613# if STACKGUARD 1211 stack_start = cctx->sptr;
614 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1212 stack_size = cctx->ssize;
615# endif
616
617#else
618
619 cctx->ssize = STACKSIZE * (long)sizeof (long);
620 New (0, cctx->sptr, STACKSIZE, long);
621
622 if (!cctx->sptr)
623 { 1213 }
624 perror ("FATAL: unable to malloc stack for coroutine");
625 _exit (EXIT_FAILURE);
626 }
627 1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
628#endif 1217 #endif
629 1218
630#if USE_VALGRIND 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
631 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
632 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
633 cctx->ssize + (char *)cctx->sptr
634 );
635#endif
636
637 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
638 1220
639 return cctx; 1221 return cctx;
640} 1222}
641 1223
642static void 1224static void
… …
644{ 1226{
645 if (!cctx) 1227 if (!cctx)
646 return; 1228 return;
647 1229
648 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
649 1232
650#if USE_VALGRIND 1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1236 #if CORO_USE_VALGRIND
651 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
652#endif 1238 #endif
653 1239
654#if HAVE_MMAP 1240#if HAVE_MMAP
1241 if (cctx->flags & CC_MAPPED)
655 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
656#else 1243 else
1244#endif
657 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
658#endif 1246 }
659 1247
660 Safefree (cctx); 1248 Safefree (cctx);
661} 1249}
662 1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1253
663static coro_cctx * 1254static coro_cctx *
664cctx_get () 1255cctx_get (pTHX)
665{ 1256{
666 coro_cctx *cctx; 1257 while (expect_true (cctx_first))
667
668 if (cctx_first)
669 { 1258 {
670 cctx = cctx_first; 1259 coro_cctx *cctx = cctx_first;
671 cctx_first = cctx->next; 1260 cctx_first = cctx->next;
672 --cctx_idle; 1261 --cctx_idle;
673 } 1262
674 else 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
675 { 1264 return cctx;
676 cctx = cctx_new (); 1265
677 PL_op = PL_op->op_next; 1266 cctx_destroy (cctx);
678 } 1267 }
679 1268
680 return cctx; 1269 return cctx_new_run ();
681} 1270}
682 1271
683static void 1272static void
684cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
685{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
686 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
687 if (cctx_idle >= MAX_IDLE_CCTX) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
688 { 1279 {
689 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
690 cctx_first = first->next; 1281 cctx_first = first->next;
691 --cctx_idle; 1282 --cctx_idle;
692 1283
693 assert (!first->inuse);
694 cctx_destroy (first); 1284 cctx_destroy (first);
695 } 1285 }
696 1286
697 ++cctx_idle; 1287 ++cctx_idle;
698 cctx->next = cctx_first; 1288 cctx->next = cctx_first;
699 cctx_first = cctx; 1289 cctx_first = cctx;
700} 1290}
701 1291
702/* never call directly, always through the coro_state_transfer global variable */ 1292/** coroutine switching *****************************************************/
703static void NOINLINE 1293
1294static void
704transfer (struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
705{ 1320{
706 dSTACKLEVEL; 1321 dSTACKLEVEL;
707 1322
708 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
709 if (!next) 1324 if (expect_false (!next))
710 { 1325 {
711 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
712 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */ 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
713 } 1328 }
714 else if (prev != next) 1329 else if (expect_true (prev != next))
715 { 1330 {
716 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
717 1332
718 if (prev->flags & CF_NEW) 1333 if (expect_false (prev->flags & CF_NEW))
719 { 1334 {
720 /* create a new empty context */ 1335 /* create a new empty/source context */
721 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
722 prev->cctx->inuse = 1;
723 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
724 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
725 } 1339 }
726 1340
727 /*TODO: must not croak here */
728 if (!prev->flags & CF_RUNNING)
729 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
730
731 if (next->flags & CF_RUNNING)
732 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
733
734 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
735 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
736 1343
737 LOCK; 1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
738 1346
739 if (next->flags & CF_NEW) 1347 if (expect_false (next->flags & CF_NEW))
740 { 1348 {
741 /* need to start coroutine */ 1349 /* need to start coroutine */
742 next->flags &= ~CF_NEW; 1350 next->flags &= ~CF_NEW;
743 /* first get rid of the old state */
744 save_perl (prev);
745 /* setup coroutine call */ 1351 /* setup coroutine call */
746 setup_coro (next); 1352 coro_setup (aTHX_ next);
747 /* need a new stack */
748 assert (!next->cctx);
749 } 1353 }
750 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
751 { 1365 {
752 /* coroutine already started */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
753 save_perl (prev); 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
754 load_perl (next); 1368
1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
755 } 1378 }
756 1379
757 prev__cctx = prev->cctx; 1380 ++next->usecount;
758 1381
759 /* possibly "free" the cctx */
760 if (prev__cctx->idle_sp == STACKLEVEL)
761 {
762 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
763 assert (PL_top_env == prev__cctx->top_env);
764
765 prev->cctx = 0;
766
767 cctx_put (prev__cctx);
768 prev__cctx->inuse = 0;
769 }
770
771 if (!next->cctx) 1382 if (expect_true (!next->cctx))
772 {
773 next->cctx = cctx_get (); 1383 next->cctx = cctx_get (aTHX);
774 assert (!next->cctx->inuse);
775 next->cctx->inuse = 1;
776 }
777 1384
778 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
779 { 1386 {
780 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
781 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
782 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
783 } 1390 }
784 1391
785 free_coro_mortal (); 1392 transfer_tail (aTHX);
786
787 UNLOCK;
788 } 1393 }
789} 1394}
790 1395
791struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
792{
793 struct coro *prev, *next;
794};
795
796#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
797 1398
1399/** high level stuff ********************************************************/
1400
798static void 1401static int
799coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
800{ 1403{
801 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
802 return; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
803 1420
804 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
805 { 1422 {
806 struct coro temp; 1423 struct coro temp;
807 Zero (&temp, 1, struct coro);
808 temp.save = CORO_SAVE_ALL;
809 1424
810 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
811 croak ("FATAL: tried to destroy currently running coroutine");
812 1426
813 save_perl (&temp); 1427 save_perl (aTHX_ &temp);
814 load_perl (coro); 1428 load_perl (aTHX_ coro);
815 1429
816 coro_destroy_stacks (); 1430 coro_destruct (aTHX_ coro);
817 1431
818 load_perl (&temp); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
819 1433
820 coro->mainstack = 0; 1434 coro->slot = 0;
821 } 1435 }
822 1436
823 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
824 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
825 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
826} 1445}
827 1446
828static int 1447static int
829coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
830{ 1449{
831 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
832 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
833 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
834 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
835 1460
836 return 0; 1461 return 0;
837} 1462}
838 1463
839static int 1464static int
… …
846 return 0; 1471 return 0;
847} 1472}
848 1473
849static MGVTBL coro_state_vtbl = { 1474static MGVTBL coro_state_vtbl = {
850 0, 0, 0, 0, 1475 0, 0, 0, 0,
851 coro_state_clear, 1476 coro_state_free,
852 0, 1477 0,
853#ifdef MGf_DUP 1478#ifdef MGf_DUP
854 coro_state_dup, 1479 coro_state_dup,
855#else 1480#else
856# define MGf_DUP 0 1481# define MGf_DUP 0
857#endif 1482#endif
858}; 1483};
859 1484
860static struct coro *
861SvSTATE (SV *coro)
862{
863 HV *stash;
864 MAGIC *mg;
865
866 if (SvROK (coro))
867 coro = SvRV (coro);
868
869 stash = SvSTASH (coro);
870 if (stash != coro_stash && stash != coro_state_stash)
871 {
872 /* very slow, but rare, check */
873 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
874 croak ("Coro::State object required");
875 }
876
877 mg = SvMAGIC (coro);
878 assert (mg->mg_type == PERL_MAGIC_ext);
879 return (struct coro *)mg->mg_ptr;
880}
881
882static void 1485static void
883prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
884{ 1487{
885 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
886 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
887} 1491}
888 1492
889static void 1493static void
890api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
891{ 1495{
892 struct transfer_args ta; 1496 struct coro_transfer_args ta;
893 1497
894 prepare_transfer (&ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
895 TRANSFER (ta); 1499 TRANSFER (ta, 1);
1500}
1501
1502/** Coro ********************************************************************/
1503
1504INLINE void
1505coro_enq (pTHX_ struct coro *coro)
1506{
1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1508}
1509
1510INLINE SV *
1511coro_deq (pTHX)
1512{
1513 int prio;
1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
896} 1520}
897 1521
898static int 1522static int
899api_save (SV *coro_sv, int new_save)
900{
901 struct coro *coro = SvSTATE (coro_sv);
902 int old_save = coro->save;
903
904 if (new_save >= 0)
905 coro->save = new_save;
906
907 return old_save;
908}
909
910/** Coro ********************************************************************/
911
912#define PRIO_MAX 3
913#define PRIO_HIGH 1
914#define PRIO_NORMAL 0
915#define PRIO_LOW -1
916#define PRIO_IDLE -3
917#define PRIO_MIN -4
918
919/* for Coro.pm */
920static SV *coro_current;
921static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922static int coro_nready;
923
924static void
925coro_enq (SV *coro_sv)
926{
927 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
928 coro_nready++;
929}
930
931static SV *
932coro_deq (int min_prio)
933{
934 int prio = PRIO_MAX - PRIO_MIN;
935
936 min_prio -= PRIO_MIN;
937 if (min_prio < 0)
938 min_prio = 0;
939
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
941 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]);
945 }
946
947 return 0;
948}
949
950static int
951api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
952{ 1524{
953 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
954 1528
955 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
956 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
957 1531
958 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
959 1533
960 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
961 return 0; 1535 return 0;
962 1536
963#if 0 /* this is actually harmless */
964 if (coro->flags & CF_RUNNING)
965 croak ("Coro::ready called on currently running coroutine");
966#endif
967
968 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
969 1538
970 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
971 coro_enq (SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
972 UNLOCK; 1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
973 1562
974 return 1; 1563 return 1;
975} 1564}
976 1565
977static int 1566static int
978api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
979{ 1568{
980 return !!SvSTATE (coro_sv)->flags & CF_READY; 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
981} 1570}
982 1571
983static void 1572INLINE void
984prepare_schedule (struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
985{ 1574{
986 SV *prev, *next; 1575 SV *prev_sv, *next_sv;
987 1576
988 for (;;) 1577 for (;;)
989 { 1578 {
990 LOCK;
991 next = coro_deq (PRIO_MIN); 1579 next_sv = coro_deq (aTHX);
992 UNLOCK;
993 1580
994 if (next) 1581 /* nothing to schedule: call the idle handler */
995 break; 1582 if (expect_false (!next_sv))
996
997 { 1583 {
998 dSP; 1584 dSP;
999 1585
1000 ENTER; 1586 ENTER;
1001 SAVETMPS; 1587 SAVETMPS;
1002 1588
1003 PUSHMARK (SP); 1589 PUSHMARK (SP);
1004 PUTBACK; 1590 PUTBACK;
1005 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1006 1592
1007 FREETMPS; 1593 FREETMPS;
1008 LEAVE; 1594 LEAVE;
1595 continue;
1009 } 1596 }
1010 }
1011 1597
1012 prev = SvRV (coro_current); 1598 ta->next = SvSTATE_hv (next_sv);
1013 SvRV_set (coro_current, next); 1599
1600 /* cannot transfer to destroyed coros, skip and look for next */
1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1602 {
1603 SvREFCNT_dec (next_sv);
1604 /* coro_nready has already been taken care of by destroy */
1605 continue;
1606 }
1607
1608 --coro_nready;
1609 break;
1610 }
1014 1611
1015 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1016 LOCK; 1613 prev_sv = SvRV (coro_current);
1017 free_coro_mortal ();
1018 UNLOCK;
1019 coro_mortal = prev;
1020
1021 assert (!SvROK(prev));//D
1022 assert (!SvROK(next));//D
1023
1024 ta->prev = SvSTATE (prev); 1614 ta->prev = SvSTATE_hv (prev_sv);
1025 ta->next = SvSTATE (next); 1615 TRANSFER_CHECK (*ta);
1026 1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1027 assert (ta->next->flags & CF_READY);
1028 ta->next->flags &= ~CF_READY; 1617 ta->next->flags &= ~CF_READY;
1029} 1618 SvRV_set (coro_current, next_sv);
1030 1619
1031static void 1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622}
1623
1624INLINE void
1032prepare_cede (struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1033{ 1626{
1034 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1035
1036 prepare_schedule (ta); 1628 prepare_schedule (aTHX_ ta);
1037} 1629}
1038 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1039static void 1645static void
1040api_schedule (void) 1646api_schedule (pTHX)
1041{ 1647{
1042 struct transfer_args ta; 1648 struct coro_transfer_args ta;
1043 1649
1044 prepare_schedule (&ta); 1650 prepare_schedule (aTHX_ &ta);
1045 TRANSFER (ta); 1651 TRANSFER (ta, 1);
1046} 1652}
1047 1653
1048static void 1654static int
1049api_cede (void) 1655api_cede (pTHX)
1050{ 1656{
1051 struct transfer_args ta; 1657 struct coro_transfer_args ta;
1052 1658
1053 prepare_cede (&ta); 1659 prepare_cede (aTHX_ &ta);
1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1054 TRANSFER (ta); 1663 TRANSFER (ta, 1);
1664 return 1;
1665 }
1666 else
1667 return 0;
1055} 1668}
1056 1669
1670static int
1671api_cede_notself (pTHX)
1672{
1673 if (coro_nready)
1674 {
1675 struct coro_transfer_args ta;
1676
1677 prepare_cede_notself (aTHX_ &ta);
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 /* make sure we put something on the stack in scalar context */
1846 if (GIMME_V == G_SCALAR)
1847 {
1848 dSP;
1849 SV **bot = PL_stack_base + checkmark;
1850
1851 if (sp == bot) /* too few, push undef */
1852 bot [1] = &PL_sv_undef;
1853 else if (sp != bot + 1) /* too many, take last one */
1854 bot [1] = *sp;
1855
1856 SP = bot + 1;
1857
1858 PUTBACK;
1859 }
1860
1861 /* exception handling */
1862 if (expect_false (coro_throw))
1863 {
1864 SV *exception = sv_2mortal (coro_throw);
1865
1866 coro_throw = 0;
1867 sv_setsv (ERRSV, exception);
1868 croak (0);
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static void
2003coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2004{
2005 SV *count_sv = AvARRAY (av)[0];
2006 IV count = SvIVX (count_sv);
2007
2008 count += adjust;
2009 SvIVX (count_sv) = count;
2010
2011 /* now wake up as many waiters as are expected to lock */
2012 while (count > 0 && AvFILLp (av) > 0)
2013 {
2014 SV *cb;
2015
2016 /* swap first two elements so we can shift a waiter */
2017 AvARRAY (av)[0] = AvARRAY (av)[1];
2018 AvARRAY (av)[1] = count_sv;
2019 cb = av_shift (av);
2020
2021 if (SvOBJECT (cb))
2022 api_ready (aTHX_ cb);
2023 else
2024 croak ("callbacks not yet supported");
2025
2026 SvREFCNT_dec (cb);
2027
2028 --count;
2029 }
2030}
2031
2032static void
2033coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2034{
2035 /* call $sem->adjust (0) to possibly wake up some other waiters */
2036 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2037}
2038
2039static int
2040slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2041{
2042 AV *av = (AV *)frame->data;
2043 SV *count_sv = AvARRAY (av)[0];
2044
2045 if (SvIVX (count_sv) > 0)
2046 {
2047 SvSTATE_current->on_destroy = 0;
2048 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2049 return 0;
2050 }
2051 else
2052 {
2053 int i;
2054 /* if we were woken up but can't down, we look through the whole */
2055 /* waiters list and only add us if we aren't in there already */
2056 /* this avoids some degenerate memory usage cases */
2057
2058 for (i = 1; i <= AvFILLp (av); ++i)
2059 if (AvARRAY (av)[i] == SvRV (coro_current))
2060 return 1;
2061
2062 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2063 return 1;
2064 }
2065}
2066
2067static void
2068slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 AV *av = (AV *)SvRV (arg [0]);
2071
2072 if (SvIVX (AvARRAY (av)[0]) > 0)
2073 {
2074 frame->data = (void *)av;
2075 frame->prepare = prepare_nop;
2076 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2077 }
2078 else
2079 {
2080 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2081
2082 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2083 frame->prepare = prepare_schedule;
2084
2085 /* to avoid race conditions when a woken-up coro gets terminated */
2086 /* we arrange for a temporary on_destroy that calls adjust (0) */
2087 assert (!SvSTATE_current->on_destroy);//D
2088 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2089 }
2090
2091 frame->check = slf_check_semaphore_down;
2092
2093}
2094
2095/*****************************************************************************/
2096/* gensub: simple closure generation utility */
2097
2098#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2099
2100/* create a closure from XS, returns a code reference */
2101/* the arg can be accessed via GENSUB_ARG from the callback */
2102/* the callback must use dXSARGS/XSRETURN */
2103static SV *
2104gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2105{
2106 CV *cv = (CV *)newSV (0);
2107
2108 sv_upgrade ((SV *)cv, SVt_PVCV);
2109
2110 CvANON_on (cv);
2111 CvISXSUB_on (cv);
2112 CvXSUB (cv) = xsub;
2113 GENSUB_ARG = arg;
2114
2115 return newRV_noinc ((SV *)cv);
2116}
2117
2118/*****************************************************************************/
2119/* Coro::AIO */
2120
2121#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2122
2123/* helper storage struct */
2124struct io_state
2125{
2126 int errorno;
2127 I32 laststype; /* U16 in 5.10.0 */
2128 int laststatval;
2129 Stat_t statcache;
2130};
2131
2132static void
2133coro_aio_callback (pTHX_ CV *cv)
2134{
2135 dXSARGS;
2136 AV *state = (AV *)GENSUB_ARG;
2137 SV *coro = av_pop (state);
2138 SV *data_sv = newSV (sizeof (struct io_state));
2139
2140 av_extend (state, items);
2141
2142 sv_upgrade (data_sv, SVt_PV);
2143 SvCUR_set (data_sv, sizeof (struct io_state));
2144 SvPOK_only (data_sv);
2145
2146 {
2147 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2148
2149 data->errorno = errno;
2150 data->laststype = PL_laststype;
2151 data->laststatval = PL_laststatval;
2152 data->statcache = PL_statcache;
2153 }
2154
2155 /* now build the result vector out of all the parameters and the data_sv */
2156 {
2157 int i;
2158
2159 for (i = 0; i < items; ++i)
2160 av_push (state, SvREFCNT_inc_NN (ST (i)));
2161 }
2162
2163 av_push (state, data_sv);
2164
2165 api_ready (aTHX_ coro);
2166 SvREFCNT_dec (coro);
2167 SvREFCNT_dec ((AV *)state);
2168}
2169
2170static int
2171slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2172{
2173 AV *state = (AV *)frame->data;
2174
2175 /* one element that is an RV? repeat! */
2176 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2177 return 1;
2178
2179 /* restore status */
2180 {
2181 SV *data_sv = av_pop (state);
2182 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2183
2184 errno = data->errorno;
2185 PL_laststype = data->laststype;
2186 PL_laststatval = data->laststatval;
2187 PL_statcache = data->statcache;
2188
2189 SvREFCNT_dec (data_sv);
2190 }
2191
2192 /* push result values */
2193 {
2194 dSP;
2195 int i;
2196
2197 EXTEND (SP, AvFILLp (state) + 1);
2198 for (i = 0; i <= AvFILLp (state); ++i)
2199 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2200
2201 PUTBACK;
2202 }
2203
2204 return 0;
2205}
2206
2207static void
2208slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2211 SV *coro_hv = SvRV (coro_current);
2212 struct coro *coro = SvSTATE_hv (coro_hv);
2213
2214 /* put our coroutine id on the state arg */
2215 av_push (state, SvREFCNT_inc_NN (coro_hv));
2216
2217 /* first see whether we have a non-zero priority and set it as AIO prio */
2218 if (coro->prio)
2219 {
2220 dSP;
2221
2222 static SV *prio_cv;
2223 static SV *prio_sv;
2224
2225 if (expect_false (!prio_cv))
2226 {
2227 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2228 prio_sv = newSViv (0);
2229 }
2230
2231 PUSHMARK (SP);
2232 sv_setiv (prio_sv, coro->prio);
2233 XPUSHs (prio_sv);
2234
2235 PUTBACK;
2236 call_sv (prio_cv, G_VOID | G_DISCARD);
2237 }
2238
2239 /* now call the original request */
2240 {
2241 dSP;
2242 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2243 int i;
2244
2245 PUSHMARK (SP);
2246
2247 /* first push all args to the stack */
2248 EXTEND (SP, items + 1);
2249
2250 for (i = 0; i < items; ++i)
2251 PUSHs (arg [i]);
2252
2253 /* now push the callback closure */
2254 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2255
2256 /* now call the AIO function - we assume our request is uncancelable */
2257 PUTBACK;
2258 call_sv ((SV *)req, G_VOID | G_DISCARD);
2259 }
2260
2261 /* now that the requets is going, we loop toll we have a result */
2262 frame->data = (void *)state;
2263 frame->prepare = prepare_schedule;
2264 frame->check = slf_check_aio_req;
2265}
2266
2267static void
2268coro_aio_req_xs (pTHX_ CV *cv)
2269{
2270 dXSARGS;
2271
2272 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2273
2274 XSRETURN_EMPTY;
2275}
2276
2277/*****************************************************************************/
2278
1057MODULE = Coro::State PACKAGE = Coro::State 2279MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1058 2280
1059PROTOTYPES: DISABLE 2281PROTOTYPES: DISABLE
1060 2282
1061BOOT: 2283BOOT:
1062{ 2284{
1063#ifdef USE_ITHREADS 2285#ifdef USE_ITHREADS
1064 MUTEX_INIT (&coro_mutex); 2286# if CORO_PTHREAD
2287 coro_thx = PERL_GET_CONTEXT;
2288# endif
1065#endif 2289#endif
1066 BOOT_PAGESIZE; 2290 BOOT_PAGESIZE;
1067 2291
2292 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2293 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2294
2295 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2296 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2297 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2298
2299 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2300 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2301 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2302
1068 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2303 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1069 2304
2305 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2306 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1070 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1071 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1072 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1073 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1074 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2308 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1075 2309
1076 main_mainstack = PL_mainstack; 2310 main_mainstack = PL_mainstack;
2311 main_top_env = PL_top_env;
1077 2312
2313 while (main_top_env->je_prev)
2314 main_top_env = main_top_env->je_prev;
2315
2316 {
2317 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2318
2319 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2320 hv_store_ent (PL_custom_op_names, slf,
2321 newSVpv ("coro_slf", 0), 0);
2322
2323 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2324 hv_store_ent (PL_custom_op_descs, slf,
2325 newSVpv ("coro schedule like function", 0), 0);
2326 }
2327
1078 coroapi.ver = CORO_API_VERSION; 2328 coroapi.ver = CORO_API_VERSION;
2329 coroapi.rev = CORO_API_REVISION;
2330
1079 coroapi.transfer = api_transfer; 2331 coroapi.transfer = api_transfer;
2332
2333 coroapi.sv_state = SvSTATE_;
2334 coroapi.execute_slf = api_execute_slf;
2335 coroapi.prepare_nop = prepare_nop;
2336 coroapi.prepare_schedule = prepare_schedule;
2337 coroapi.prepare_cede = prepare_cede;
2338 coroapi.prepare_cede_notself = prepare_cede_notself;
2339
2340 {
2341 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2342
2343 if (!svp) croak ("Time::HiRes is required");
2344 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2345
2346 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2347 }
1080 2348
1081 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2349 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1082} 2350}
1083 2351
1084SV * 2352SV *
1085new (char *klass, ...) 2353new (char *klass, ...)
1086 CODE: 2354 CODE:
1087{ 2355{
1088 struct coro *coro; 2356 struct coro *coro;
2357 MAGIC *mg;
1089 HV *hv; 2358 HV *hv;
1090 int i; 2359 int i;
1091 2360
1092 Newz (0, coro, 1, struct coro); 2361 Newz (0, coro, 1, struct coro);
1093 coro->args = newAV (); 2362 coro->args = newAV ();
1094 coro->save = CORO_SAVE_ALL;
1095 coro->flags = CF_NEW; 2363 coro->flags = CF_NEW;
1096 2364
2365 if (coro_first) coro_first->prev = coro;
2366 coro->next = coro_first;
2367 coro_first = coro;
2368
1097 hv = newHV (); 2369 coro->hv = hv = newHV ();
1098 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2370 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2371 mg->mg_flags |= MGf_DUP;
1099 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2372 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1100 2373
2374 av_extend (coro->args, items - 1);
1101 for (i = 1; i < items; i++) 2375 for (i = 1; i < items; i++)
1102 av_push (coro->args, newSVsv (ST (i))); 2376 av_push (coro->args, newSVsv (ST (i)));
1103} 2377}
1104 OUTPUT: 2378 OUTPUT:
1105 RETVAL 2379 RETVAL
1106 2380
1107int 2381void
1108save (SV *coro, int new_save = -1) 2382transfer (...)
2383 PROTOTYPE: $$
1109 CODE: 2384 CODE:
1110 RETVAL = api_save (coro, new_save); 2385 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2386
2387bool
2388_destroy (SV *coro_sv)
2389 CODE:
2390 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1111 OUTPUT: 2391 OUTPUT:
1112 RETVAL 2392 RETVAL
1113 2393
1114void 2394void
1115_set_stacklevel (...)
1116 ALIAS:
1117 Coro::State::transfer = 1
1118 Coro::schedule = 2
1119 Coro::cede = 3
1120 CODE:
1121{
1122 struct transfer_args ta;
1123
1124 switch (ix)
1125 {
1126 case 0:
1127 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1128 ta.next = 0;
1129 break;
1130
1131 case 1:
1132 if (items != 2)
1133 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1134
1135 prepare_transfer (&ta, ST (0), ST (1));
1136 break;
1137
1138 case 2:
1139 prepare_schedule (&ta);
1140 break;
1141
1142 case 3:
1143 prepare_cede (&ta);
1144 break;
1145 }
1146
1147 TRANSFER (ta);
1148}
1149
1150void
1151_clone_state_from (SV *dst, SV *src)
1152 CODE:
1153{
1154 struct coro *coro_src = SvSTATE (src);
1155
1156 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1157
1158 ++coro_src->refcnt;
1159 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1160}
1161
1162void
1163_exit (code) 2395_exit (int code)
1164 int code
1165 PROTOTYPE: $ 2396 PROTOTYPE: $
1166 CODE: 2397 CODE:
1167 _exit (code); 2398 _exit (code);
1168 2399
1169int 2400int
2401cctx_stacksize (int new_stacksize = 0)
2402 PROTOTYPE: ;$
2403 CODE:
2404 RETVAL = cctx_stacksize;
2405 if (new_stacksize)
2406 {
2407 cctx_stacksize = new_stacksize;
2408 ++cctx_gen;
2409 }
2410 OUTPUT:
2411 RETVAL
2412
2413int
2414cctx_max_idle (int max_idle = 0)
2415 PROTOTYPE: ;$
2416 CODE:
2417 RETVAL = cctx_max_idle;
2418 if (max_idle > 1)
2419 cctx_max_idle = max_idle;
2420 OUTPUT:
2421 RETVAL
2422
2423int
1170cctx_count () 2424cctx_count ()
2425 PROTOTYPE:
1171 CODE: 2426 CODE:
1172 RETVAL = cctx_count; 2427 RETVAL = cctx_count;
1173 OUTPUT: 2428 OUTPUT:
1174 RETVAL 2429 RETVAL
1175 2430
1176int 2431int
1177cctx_idle () 2432cctx_idle ()
2433 PROTOTYPE:
1178 CODE: 2434 CODE:
1179 RETVAL = cctx_idle; 2435 RETVAL = cctx_idle;
1180 OUTPUT: 2436 OUTPUT:
1181 RETVAL 2437 RETVAL
1182 2438
2439void
2440list ()
2441 PROTOTYPE:
2442 PPCODE:
2443{
2444 struct coro *coro;
2445 for (coro = coro_first; coro; coro = coro->next)
2446 if (coro->hv)
2447 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2448}
2449
2450void
2451call (Coro::State coro, SV *coderef)
2452 ALIAS:
2453 eval = 1
2454 CODE:
2455{
2456 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2457 {
2458 struct coro temp;
2459
2460 if (!(coro->flags & CF_RUNNING))
2461 {
2462 PUTBACK;
2463 save_perl (aTHX_ &temp);
2464 load_perl (aTHX_ coro);
2465 }
2466
2467 {
2468 dSP;
2469 ENTER;
2470 SAVETMPS;
2471 PUTBACK;
2472 PUSHSTACK;
2473 PUSHMARK (SP);
2474
2475 if (ix)
2476 eval_sv (coderef, 0);
2477 else
2478 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2479
2480 POPSTACK;
2481 SPAGAIN;
2482 FREETMPS;
2483 LEAVE;
2484 PUTBACK;
2485 }
2486
2487 if (!(coro->flags & CF_RUNNING))
2488 {
2489 save_perl (aTHX_ coro);
2490 load_perl (aTHX_ &temp);
2491 SPAGAIN;
2492 }
2493 }
2494}
2495
2496SV *
2497is_ready (Coro::State coro)
2498 PROTOTYPE: $
2499 ALIAS:
2500 is_ready = CF_READY
2501 is_running = CF_RUNNING
2502 is_new = CF_NEW
2503 is_destroyed = CF_DESTROYED
2504 CODE:
2505 RETVAL = boolSV (coro->flags & ix);
2506 OUTPUT:
2507 RETVAL
2508
2509void
2510throw (Coro::State self, SV *throw = &PL_sv_undef)
2511 PROTOTYPE: $;$
2512 CODE:
2513{
2514 struct coro *current = SvSTATE_current;
2515 SV **throwp = self == current ? &coro_throw : &self->throw;
2516 SvREFCNT_dec (*throwp);
2517 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2518}
2519
2520void
2521api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2522 PROTOTYPE: $;$
2523 C_ARGS: aTHX_ coro, flags
2524
2525SV *
2526has_cctx (Coro::State coro)
2527 PROTOTYPE: $
2528 CODE:
2529 RETVAL = boolSV (!!coro->cctx);
2530 OUTPUT:
2531 RETVAL
2532
2533int
2534is_traced (Coro::State coro)
2535 PROTOTYPE: $
2536 CODE:
2537 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2538 OUTPUT:
2539 RETVAL
2540
2541UV
2542rss (Coro::State coro)
2543 PROTOTYPE: $
2544 ALIAS:
2545 usecount = 1
2546 CODE:
2547 switch (ix)
2548 {
2549 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2550 case 1: RETVAL = coro->usecount; break;
2551 }
2552 OUTPUT:
2553 RETVAL
2554
2555void
2556force_cctx ()
2557 PROTOTYPE:
2558 CODE:
2559 SvSTATE_current->cctx->idle_sp = 0;
2560
2561void
2562swap_defsv (Coro::State self)
2563 PROTOTYPE: $
2564 ALIAS:
2565 swap_defav = 1
2566 CODE:
2567 if (!self->slot)
2568 croak ("cannot swap state with coroutine that has no saved state,");
2569 else
2570 {
2571 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2572 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2573
2574 SV *tmp = *src; *src = *dst; *dst = tmp;
2575 }
2576
2577
1183MODULE = Coro::State PACKAGE = Coro 2578MODULE = Coro::State PACKAGE = Coro
1184 2579
1185BOOT: 2580BOOT:
1186{ 2581{
1187 int i; 2582 int i;
1188 2583
2584 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2585 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2586 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2587
2588 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2589 SvREADONLY_on (coro_current);
2590
1189 coro_stash = gv_stashpv ("Coro", TRUE); 2591 coro_stash = gv_stashpv ("Coro", TRUE);
1190 2592
1191 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2593 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1192 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2594 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1193 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2595 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1194 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2596 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1195 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2597 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1196 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2598 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1197 2599
1198 coro_current = get_sv ("Coro::current", FALSE);
1199 SvREADONLY_on (coro_current);
1200
1201 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2600 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1202 coro_ready[i] = newAV (); 2601 coro_ready[i] = newAV ();
1203 2602
1204 { 2603 {
1205 SV *sv = perl_get_sv("Coro::API", 1); 2604 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1206 2605
1207 coroapi.schedule = api_schedule; 2606 coroapi.schedule = api_schedule;
1208 coroapi.save = api_save;
1209 coroapi.cede = api_cede; 2607 coroapi.cede = api_cede;
2608 coroapi.cede_notself = api_cede_notself;
1210 coroapi.ready = api_ready; 2609 coroapi.ready = api_ready;
1211 coroapi.is_ready = api_is_ready; 2610 coroapi.is_ready = api_is_ready;
1212 coroapi.nready = &coro_nready; 2611 coroapi.nready = coro_nready;
1213 coroapi.current = coro_current; 2612 coroapi.current = coro_current;
1214 2613
1215 GCoroAPI = &coroapi; 2614 GCoroAPI = &coroapi;
1216 sv_setiv (sv, (IV)&coroapi); 2615 sv_setiv (sv, (IV)&coroapi);
1217 SvREADONLY_on (sv); 2616 SvREADONLY_on (sv);
1218 } 2617 }
1219} 2618}
2619
2620void
2621schedule (...)
2622 CODE:
2623 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2624
2625void
2626cede (...)
2627 CODE:
2628 CORO_EXECUTE_SLF_XS (slf_init_cede);
2629
2630void
2631cede_notself (...)
2632 CODE:
2633 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1220 2634
1221void 2635void
1222_set_current (SV *current) 2636_set_current (SV *current)
1223 PROTOTYPE: $ 2637 PROTOTYPE: $
1224 CODE: 2638 CODE:
1225 SvREFCNT_dec (SvRV (coro_current)); 2639 SvREFCNT_dec (SvRV (coro_current));
1226 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2640 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2641
2642void
2643_set_readyhook (SV *hook)
2644 PROTOTYPE: $
2645 CODE:
2646 SvREFCNT_dec (coro_readyhook);
2647 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1227 2648
1228int 2649int
1229prio (Coro::State coro, int newprio = 0) 2650prio (Coro::State coro, int newprio = 0)
2651 PROTOTYPE: $;$
1230 ALIAS: 2652 ALIAS:
1231 nice = 1 2653 nice = 1
1232 CODE: 2654 CODE:
1233{ 2655{
1234 RETVAL = coro->prio; 2656 RETVAL = coro->prio;
1235 2657
1236 if (items > 1) 2658 if (items > 1)
1237 { 2659 {
1238 if (ix) 2660 if (ix)
1239 newprio += coro->prio; 2661 newprio = coro->prio - newprio;
1240 2662
1241 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2663 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1242 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2664 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1243 2665
1244 coro->prio = newprio; 2666 coro->prio = newprio;
1245 } 2667 }
1246} 2668}
2669 OUTPUT:
2670 RETVAL
1247 2671
1248SV * 2672SV *
1249ready (SV *self) 2673ready (SV *self)
1250 PROTOTYPE: $ 2674 PROTOTYPE: $
1251 CODE: 2675 CODE:
1252 RETVAL = boolSV (api_ready (self)); 2676 RETVAL = boolSV (api_ready (aTHX_ self));
1253 OUTPUT:
1254 RETVAL
1255
1256SV *
1257is_ready (SV *self)
1258 PROTOTYPE: $
1259 CODE:
1260 RETVAL = boolSV (api_is_ready (self));
1261 OUTPUT: 2677 OUTPUT:
1262 RETVAL 2678 RETVAL
1263 2679
1264int 2680int
1265nready (...) 2681nready (...)
… …
1267 CODE: 2683 CODE:
1268 RETVAL = coro_nready; 2684 RETVAL = coro_nready;
1269 OUTPUT: 2685 OUTPUT:
1270 RETVAL 2686 RETVAL
1271 2687
2688# for async_pool speedup
2689void
2690_pool_1 (SV *cb)
2691 CODE:
2692{
2693 HV *hv = (HV *)SvRV (coro_current);
2694 struct coro *coro = SvSTATE_hv ((SV *)hv);
2695 AV *defav = GvAV (PL_defgv);
2696 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2697 AV *invoke_av;
2698 int i, len;
2699
2700 if (!invoke)
2701 {
2702 SV *old = PL_diehook;
2703 PL_diehook = 0;
2704 SvREFCNT_dec (old);
2705 croak ("\3async_pool terminate\2\n");
2706 }
2707
2708 SvREFCNT_dec (coro->saved_deffh);
2709 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2710
2711 hv_store (hv, "desc", sizeof ("desc") - 1,
2712 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2713
2714 invoke_av = (AV *)SvRV (invoke);
2715 len = av_len (invoke_av);
2716
2717 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2718
2719 if (len > 0)
2720 {
2721 av_fill (defav, len - 1);
2722 for (i = 0; i < len; ++i)
2723 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2724 }
2725}
2726
2727void
2728_pool_2 (SV *cb)
2729 CODE:
2730{
2731 HV *hv = (HV *)SvRV (coro_current);
2732 struct coro *coro = SvSTATE_hv ((SV *)hv);
2733
2734 sv_setsv (cb, &PL_sv_undef);
2735
2736 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2737 coro->saved_deffh = 0;
2738
2739 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2740 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2741 {
2742 SV *old = PL_diehook;
2743 PL_diehook = 0;
2744 SvREFCNT_dec (old);
2745 croak ("\3async_pool terminate\2\n");
2746 }
2747
2748 av_clear (GvAV (PL_defgv));
2749 hv_store (hv, "desc", sizeof ("desc") - 1,
2750 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2751
2752 coro->prio = 0;
2753
2754 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2755 api_trace (aTHX_ coro_current, 0);
2756
2757 av_push (av_async_pool, newSVsv (coro_current));
2758}
2759
2760
2761MODULE = Coro::State PACKAGE = PerlIO::cede
2762
2763BOOT:
2764 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2765
2766
1272MODULE = Coro::State PACKAGE = Coro::AIO 2767MODULE = Coro::State PACKAGE = Coro::Semaphore
1273 2768
1274SV * 2769SV *
1275_get_state () 2770new (SV *klass, SV *count_ = 0)
1276 CODE: 2771 CODE:
1277{ 2772{
1278 struct io_state *data; 2773 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2774 AV *av = newAV ();
2775 SV **ary;
1279 2776
1280 RETVAL = newSV (sizeof (struct io_state)); 2777 /* unfortunately, building manually saves memory */
1281 data = (struct io_state *)SvPVX (RETVAL); 2778 Newx (ary, 2, SV *);
1282 SvCUR_set (RETVAL, sizeof (struct io_state)); 2779 AvALLOC (av) = ary;
1283 SvPOK_only (RETVAL); 2780 AvARRAY (av) = ary;
2781 AvMAX (av) = 1;
2782 AvFILLp (av) = 0;
2783 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
1284 2784
1285 data->errorno = errno; 2785 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1286 data->laststype = PL_laststype;
1287 data->laststatval = PL_laststatval;
1288 data->statcache = PL_statcache;
1289} 2786}
1290 OUTPUT: 2787 OUTPUT:
1291 RETVAL 2788 RETVAL
1292 2789
2790SV *
2791count (SV *self)
2792 CODE:
2793 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2794 OUTPUT:
2795 RETVAL
2796
1293void 2797void
1294_set_state (char *data_) 2798up (SV *self, int adjust = 1)
1295 PROTOTYPE: $ 2799 ALIAS:
2800 adjust = 1
2801 CODE:
2802 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2803
2804void
2805down (SV *self)
2806 CODE:
2807 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2808
2809void
2810try (SV *self)
2811 PPCODE:
2812{
2813 AV *av = (AV *)SvRV (self);
2814 SV *count_sv = AvARRAY (av)[0];
2815 IV count = SvIVX (count_sv);
2816
2817 if (count > 0)
2818 {
2819 --count;
2820 SvIVX (count_sv) = count;
2821 XSRETURN_YES;
2822 }
2823 else
2824 XSRETURN_NO;
2825}
2826
2827void
2828waiters (SV *self)
2829 CODE:
2830{
2831 AV *av = (AV *)SvRV (self);
2832
2833 if (GIMME_V == G_SCALAR)
2834 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2835 else
2836 {
2837 int i;
2838 EXTEND (SP, AvFILLp (av) + 1 - 1);
2839 for (i = 1; i <= AvFILLp (av); ++i)
2840 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2841 }
2842}
2843
2844
2845MODULE = Coro::State PACKAGE = Coro::AnyEvent
2846
2847BOOT:
2848 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2849
2850void
2851_schedule (...)
1296 CODE: 2852 CODE:
1297{ 2853{
1298 struct io_state *data = (void *)data_; 2854 static int incede;
1299 2855
1300 errno = data->errorno; 2856 api_cede_notself (aTHX);
1301 PL_laststype = data->laststype;
1302 PL_laststatval = data->laststatval;
1303 PL_statcache = data->statcache;
1304}
1305 2857
2858 ++incede;
2859 while (coro_nready >= incede && api_cede (aTHX))
2860 ;
2861
2862 sv_setsv (sv_activity, &PL_sv_undef);
2863 if (coro_nready >= incede)
2864 {
2865 PUSHMARK (SP);
2866 PUTBACK;
2867 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2868 }
2869
2870 --incede;
2871}
2872
2873
2874MODULE = Coro::State PACKAGE = Coro::AIO
2875
2876void
2877_register (char *target, char *proto, SV *req)
2878 CODE:
2879{
2880 HV *st;
2881 GV *gvp;
2882 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2883 /* newXSproto doesn't return the CV on 5.8 */
2884 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2885 sv_setpv ((SV *)slf_cv, proto);
2886 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2887}
2888

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