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Comparing Coro/Coro/State.xs (file contents):
Revision 1.113 by root, Thu Nov 30 20:54:24 2006 UTC vs.
Revision 1.306 by root, Wed Nov 19 11:11:10 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#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * 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
77#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
78#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
79 131
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 133
82#if __GNUC__ >= 3 134#if __GNUC__ >= 3
83# 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
84#else 138#else
85# define attribute(x) 139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
86#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
87 146
88#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
89 148
90#include "CoroAPI.h" 149#include "CoroAPI.h"
91 150#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 151
94#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 153# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 155# endif
156#endif
102 157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
107 185
108static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
110 188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
111/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 199typedef struct coro_cctx
200{
113 struct coro_cctx *next; 201 struct coro_cctx *next;
114 202
115 /* the stack */ 203 /* the stack */
116 void *sptr; 204 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
118 206
119 /* cpu state */ 207 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 210 JMPENV *top_env;
122 coro_context cctx; 211 coro_context cctx;
123 212
124 int inuse; 213 U32 gen;
125
126#if USE_VALGRIND 214#if CORO_USE_VALGRIND
127 int valgrind_id; 215 int valgrind_id;
128#endif 216#endif
217 unsigned char flags;
129} coro_cctx; 218} coro_cctx;
130 219
131enum { 220enum {
132 CF_RUNNING, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 225};
135 226
136/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
137struct coro { 228typedef struct
138 /* the c coroutine allocated to this perl coroutine, if any */ 229{
139 coro_cctx *cctx; 230 SV *defsv;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143 int refcnt;
144 int flags;
145
146 /* optionally saved, might be zero */
147 AV *defav; 231 AV *defav;
148 SV *defsv;
149 SV *errsv; 232 SV *errsv;
150 233 SV *irsgv;
151#define VAR(name,type) type name; 234#define VAR(name,type) type name;
152# include "state.h" 235# include "state.h"
153#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 AV *args; /* data associated with this coroutine (initial args) */
252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
154 259
155 /* coro process data */ 260 /* coro process data */
156 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
157}; 270};
158 271
159typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
161 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the mainr easonw e don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
280/** Coro ********************************************************************/
281
282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
162static AV * 308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
163coro_clone_padlist (CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
164{ 330{
165 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
167 333
168 newpadlist = newAV (); 334 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 336#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 338#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 340#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist); 342 --AvFILLp (padlist);
177 343
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
180 346
181 return newpadlist; 347 return newpadlist;
182} 348}
183 349
184static void 350static void
185free_padlist (AV *padlist) 351free_padlist (pTHX_ AV *padlist)
186{ 352{
187 /* may be during global destruction */ 353 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 354 if (SvREFCNT (padlist))
189 { 355 {
190 I32 i = AvFILLp (padlist); 356 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 377 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 378 AV *av = (AV *)mg->mg_obj;
213 379
214 /* casting is fun. */ 380 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 382 free_padlist (aTHX_ padlist);
217 383
218 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 385
220 return 0; 386 return 0;
221} 387}
222 388
389#define CORO_MAGIC_type_cv 26
223#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 391
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
226 396
227#define CORO_MAGIC(cv) \ 397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
228 SvMAGIC (cv) \ 399 ? SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 400 : mg_find (sv, type))
230 ? SvMAGIC (cv) \ 401
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
232 : 0 405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
233 439
234/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
235static void 441static void
236get_padlist (CV *cv) 442get_padlist (pTHX_ CV *cv)
237{ 443{
238 MAGIC *mg = CORO_MAGIC (cv); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 445 AV *av;
240 446
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 449 else
244 { 450 {
245#if 0 451#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 454 CV *cp = Perl_cv_clone (aTHX_ cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
251#else 458#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 459 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 460#endif
254 } 461 }
255} 462}
256 463
257static void 464static void
258put_padlist (CV *cv) 465put_padlist (pTHX_ CV *cv)
259{ 466{
260 MAGIC *mg = CORO_MAGIC (cv); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 468 AV *av;
262 469
263 if (!mg) 470 if (expect_false (!mg))
264 { 471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270 472
271 av = (AV *)mg->mg_obj; 473 av = (AV *)mg->mg_obj;
272 474
273 if (AvFILLp (av) >= AvMAX (av)) 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 476 av_extend (av, AvMAX (av) + 1);
275 477
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 479}
278 480
279#define SB do { 481/** load & save, init *******************************************************/
280#define SE } while (0)
281 482
282#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287static void 483static void
288load_state(Coro__State c) 484load_perl (pTHX_ Coro__State c)
289{ 485{
486 perl_slots *slot = c->slot;
487 c->slot = 0;
488
489 PL_mainstack = c->mainstack;
490
491 GvSV (PL_defgv) = slot->defsv;
492 GvAV (PL_defgv) = slot->defav;
493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
290#define VAR(name,type) PL_ ## name = c->name; 496 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 497 # include "state.h"
292#undef VAR 498 #undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297 499
298 { 500 {
299 dSP; 501 dSP;
502
300 CV *cv; 503 CV *cv;
301 504
302 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
304 { 507 {
305 put_padlist (cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 509 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 510 CvPADLIST (cv) = (AV *)POPs;
308 } 511 }
309 512
310 PUTBACK; 513 PUTBACK;
311 } 514 }
312}
313 515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
314static void 520static void
315save_state(Coro__State c, int flags) 521save_perl (pTHX_ Coro__State c)
316{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
317 { 526 {
318 dSP; 527 dSP;
319 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
321 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
323 /* 532 /*
324 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
326 */ 535 */
327 536
328 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
330 for (;;) 539 for (;;)
331 { 540 {
332 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
333 { 542 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
335 544
336 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 546 {
338 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
339 548
340 if (CvDEPTH (cv)) 549 if (expect_true (CvDEPTH (cv)))
341 { 550 {
342 EXTEND (SP, 3); 551 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
347 555
348 CvDEPTH (cv) = 0; 556 CvDEPTH (cv) = 0;
349 get_padlist (cv); 557 get_padlist (aTHX_ cv);
350 } 558 }
351 } 559 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 } 560 }
361 561
362 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 563 break;
364 564
365 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
368 } 568 }
369 569
370 PUTBACK; 570 PUTBACK;
371 } 571 }
372 572
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
377#define VAR(name,type)c->name = PL_ ## name; 595 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 596 # include "state.h"
379#undef VAR 597 #undef VAR
598 }
380} 599}
381 600
382/* 601/*
383 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
387 */ 606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks(thx) init_stacks ()
609#else
388static void 610static void
389coro_init_stacks () 611coro_init_stacks (pTHX)
390{ 612{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 613 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 617
396 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 621
400 New(50,PL_tmps_stack,96,SV*); 622 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 625 PL_tmps_max = 32;
404 626
405 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
408 630
409#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
411#endif 633#endif
412 634
413 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
416 638
417 New(54,PL_savestack,96,ANY); 639 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 641 PL_savestack_max = 24;
420 642
421#if !PERL_VERSION_ATLEAST (5,9,0) 643#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 644 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 646 PL_retstack_max = 4;
425#endif 647#endif
426} 648}
649#endif
427 650
428/* 651/*
429 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
430 */ 653 */
431static void 654static void
432coro_destroy_stacks () 655coro_destruct_stacks (pTHX)
433{ 656{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
447 659
448 while (PL_curstackinfo) 660 while (PL_curstackinfo)
449 { 661 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 662 PERL_SI *p = PL_curstackinfo->si_prev;
451 663
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 664 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 665 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 666
464 Safefree (PL_curstackinfo->si_cxstack); 667 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 668 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 669 PL_curstackinfo = p;
467 } 670 }
468 671
469 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 673 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 675 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 676#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 677 Safefree (PL_retstack);
475#endif 678#endif
476} 679}
477 680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
692 {
693 slot = &tmp_slot;
694
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
698 }
699 else
700 slot = coro->slot;
701
702 if (slot)
703 {
704 rss += sizeof (slot->curstackinfo);
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 }
716 }
717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
478static void 743static int
479setup_coro (struct coro *coro) 744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro)
480{ 830{
481 /* 831 /*
482 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
483 */ 833 */
484
485 coro_init_stacks (); 834 coro_init_stacks (aTHX);
486 835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 839 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
490 859
491 { 860 {
492 dSP; 861 dSP;
493 LOGOP myop; 862 UNOP myop;
494 863
495 /* I have no idea why this is needed, but it is */ 864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
496 PUSHMARK (SP); 868 PUSHMARK (SP);
497 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
498 SvREFCNT_dec (GvAV (PL_defgv)); 870 PUTBACK;
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID;
504
505 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 873 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 874 }
515}
516 875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
517static void 894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
915 SvREFCNT_dec (GvAV (PL_defgv));
916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
518free_coro_mortal () 932free_coro_mortal (pTHX)
519{ 933{
520 if (coro_mortal) 934 if (expect_true (coro_mortal))
521 { 935 {
522 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 937 coro_mortal = 0;
524 } 938 }
525} 939}
526 940
941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
527static void NOINLINE 1084static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1085cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1086{
530 dSP;
531 LOGOP myop;
532
533 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538
539 PUSHMARK (SP);
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN;
544}
545
546static void
547coro_run (void *arg)
548{
549 /* coro_run is the alternative epilogue of transfer() */
550 UNLOCK;
551
552 /*
553 * this is a _very_ stripped down perl interpreter ;)
554 */
555 PL_top_env = &PL_start_env; 1087 PL_top_env = &PL_start_env;
556 1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1124 dTHX;
1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
557 /* inject call to cctx_init */ 1130 /* inject a fake subroutine call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg); 1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
559 1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
560 /* somebody will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op;
561 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
562 1139
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1140 /*
564 abort (); 1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
565} 1150}
566 1151
567static coro_cctx * 1152static coro_cctx *
568cctx_new () 1153cctx_new ()
569{ 1154{
570 coro_cctx *cctx; 1155 coro_cctx *cctx;
571 1156
572 ++cctx_count; 1157 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx); 1158 New (0, cctx, 1, coro_cctx);
575 1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
1186
576#if HAVE_MMAP 1187#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1189 /* mmap supposedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1191
582 if (cctx->sptr == (void *)-1) 1192 if (cctx->sptr != (void *)-1)
1193 {
1194 #if CORO_STACKGUARD
1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
583 { 1200 }
1201 else
1202#endif
1203 {
1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
1206
1207 if (!cctx->sptr)
1208 {
584 perror ("FATAL: unable to mmap stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
585 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
586 } 1211 }
587 1212
588# if STACKGUARD 1213 stack_start = cctx->sptr;
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1214 stack_size = cctx->ssize;
590# endif
591
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 { 1215 }
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602 1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
603#endif 1219 #endif
604 1220
605#if USE_VALGRIND 1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613 1222
614 return cctx; 1223 return cctx;
615} 1224}
616 1225
617static void 1226static void
618cctx_free (coro_cctx *cctx) 1227cctx_destroy (coro_cctx *cctx)
619{ 1228{
620 if (!cctx) 1229 if (!cctx)
621 return; 1230 return;
622 1231
623 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
624 1234
625#if USE_VALGRIND 1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1240 #endif
628 1241
629#if HAVE_MMAP 1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
631#else 1245 else
1246#endif
632 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
633#endif 1248 }
634 1249
635 Safefree (cctx); 1250 Safefree (cctx);
636} 1251}
637 1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
638static coro_cctx * 1256static coro_cctx *
639cctx_get () 1257cctx_get (pTHX)
640{ 1258{
641 coro_cctx *cctx; 1259 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1260 {
1261 coro_cctx *cctx = cctx_first;
1262 cctx_first = cctx->next;
645 --cctx_idle; 1263 --cctx_idle;
646 cctx = cctx_first; 1264
647 cctx_first = cctx->next; 1265 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1266 return cctx;
649 else 1267
650 { 1268 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1269 }
654 1270
655 return cctx; 1271 return cctx_new_run ();
656} 1272}
657 1273
658static void 1274static void
659cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
660{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1279 /* free another cctx if overlimit */
1280 if (expect_false (cctx_idle >= cctx_max_idle))
1281 {
1282 coro_cctx *first = cctx_first;
1283 cctx_first = first->next;
1284 --cctx_idle;
1285
1286 cctx_destroy (first);
1287 }
1288
661 ++cctx_idle; 1289 ++cctx_idle;
662 cctx->next = cctx_first; 1290 cctx->next = cctx_first;
663 cctx_first = cctx; 1291 cctx_first = cctx;
664} 1292}
665 1293
666/* never call directly, always through the coro_state_transfer global variable */ 1294/** coroutine switching *****************************************************/
667static void NOINLINE 1295
1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
668transfer (struct coro *prev, struct coro *next, int flags) 1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1322{
670 dSTACKLEVEL; 1323 dSTACKLEVEL;
671 1324
672 /* sometimes transfer is only called to set idle_sp */ 1325 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1326 if (expect_false (!next))
1327 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1330 }
675 else if (prev != next) 1331 else if (expect_true (prev != next))
676 { 1332 {
677 coro_cctx *prev__cctx; 1333 coro_cctx *prev__cctx;
678 1334
679 if (!prev->cctx) 1335 if (expect_false (prev->flags & CF_NEW))
680 { 1336 {
681 /* create a new empty context */ 1337 /* create a new empty/source context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1338 prev->cctx = cctx_new_empty ();
683 prev->cctx->inuse = 1; 1339 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1340 prev->flags |= CF_RUNNING;
685 } 1341 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692 1342
693 prev->flags &= ~CF_RUNNING; 1343 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1344 next->flags |= CF_RUNNING;
695 1345
696 LOCK; 1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
697 1348
698 if (next->mainstack) 1349 if (expect_false (next->flags & CF_NEW))
699 { 1350 {
700 /* coroutine already started */ 1351 /* need to start coroutine */
701 SAVE (prev, flags); 1352 next->flags &= ~CF_NEW;
702 LOAD (next); 1353 /* setup coroutine call */
1354 coro_setup (aTHX_ next);
703 } 1355 }
704 else 1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
705 { 1367 {
706 /* need to start coroutine */ 1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
707 /* first get rid of the old state */ 1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
708 SAVE (prev, -1); 1370
709 /* setup coroutine call */ 1371 prev->cctx = 0;
710 setup_coro (next); 1372
711 /* need a new stack */ 1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
712 assert (!next->stack); 1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
713 } 1380 }
714 1381
715 prev__cctx = prev->cctx; 1382 ++next->usecount;
716 1383
717 /* possibly "free" the cctx */ 1384 if (expect_true (!next->cctx))
718 if (prev__cctx->idle_sp == STACKLEVEL) 1385 next->cctx = cctx_get (aTHX);
1386
1387 if (expect_false (prev__cctx != next->cctx))
719 { 1388 {
720 assert (PL_top_env == prev__cctx->top_env);
721
722 cctx_put (prev__cctx);
723 prev->cctx = 0;
724 }
725 else if (prev__cctx->idle_sp) //D
726 fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
727
728 if (!next->cctx)
729 next->cctx = cctx_get ();
730
731 if (prev__cctx != next->cctx)
732 {
733 assert ( prev__cctx->inuse);
734 assert (!next->cctx->inuse);
735
736 prev__cctx->inuse = 0;
737 next->cctx->inuse = 1;
738
739 prev__cctx->top_env = PL_top_env; 1389 prev__cctx->top_env = PL_top_env;
740 PL_top_env = next->cctx->top_env; 1390 PL_top_env = next->cctx->top_env;
741 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742 } 1392 }
743 1393
744 free_coro_mortal (); 1394 transfer_tail (aTHX);
745
746 UNLOCK;
747 } 1395 }
748} 1396}
749 1397
750struct transfer_args 1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757 1400
1401/** high level stuff ********************************************************/
1402
758static void 1403static int
759coro_state_destroy (struct coro *coro) 1404coro_state_destroy (pTHX_ struct coro *coro)
760{ 1405{
761 if (coro->refcnt--) 1406 if (coro->flags & CF_DESTROYED)
762 return; 1407 return 0;
763 1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
764 if (coro->flags & CF_RUNNING) 1414 if (coro->flags & CF_READY)
765 croak ("FATAL: tried to destroy currently running coroutine"); 1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766 1422
767 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
768 { 1424 {
769 struct coro temp; 1425 struct coro temp;
770 1426
771 SAVE ((&temp), TRANSFER_SAVE_ALL); 1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
772 LOAD (coro);
773 1428
774 coro_destroy_stacks (); 1429 save_perl (aTHX_ &temp);
1430 load_perl (aTHX_ coro);
775 1431
776 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1432 coro_destruct (aTHX_ coro);
777 1433
1434 load_perl (aTHX_ &temp);
1435
778 coro->mainstack = 0; 1436 coro->slot = 0;
779 } 1437 }
780 1438
781 cctx_free (coro->cctx); 1439 cctx_destroy (coro->cctx);
782 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
783 Safefree (coro); 1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
784} 1447}
785 1448
786static int 1449static int
787coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788{ 1451{
789 struct coro *coro = (struct coro *)mg->mg_ptr; 1452 struct coro *coro = (struct coro *)mg->mg_ptr;
790 mg->mg_ptr = 0; 1453 mg->mg_ptr = 0;
791 1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
792 coro_state_destroy (coro); 1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
793 1462
794 return 0; 1463 return 0;
795} 1464}
796 1465
797static int 1466static int
… …
804 return 0; 1473 return 0;
805} 1474}
806 1475
807static MGVTBL coro_state_vtbl = { 1476static MGVTBL coro_state_vtbl = {
808 0, 0, 0, 0, 1477 0, 0, 0, 0,
809 coro_state_clear, 1478 coro_state_free,
810 0, 1479 0,
811#ifdef MGf_DUP 1480#ifdef MGf_DUP
812 coro_state_dup, 1481 coro_state_dup,
813#else 1482#else
814# define MGf_DUP 0 1483# define MGf_DUP 0
815#endif 1484#endif
816}; 1485};
817 1486
818static struct coro *
819SvSTATE (SV *coro)
820{
821 HV *stash;
822 MAGIC *mg;
823
824 if (SvROK (coro))
825 coro = SvRV (coro);
826
827 stash = SvSTASH (coro);
828 if (stash != coro_stash && stash != coro_state_stash)
829 {
830 /* very slow, but rare, check */
831 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
832 croak ("Coro::State object required");
833 }
834
835 mg = SvMAGIC (coro);
836 assert (mg->mg_type == PERL_MAGIC_ext);
837 return (struct coro *)mg->mg_ptr;
838}
839
840static void 1487static void
841prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
842{ 1489{
843 ta->prev = SvSTATE (prev); 1490 ta->prev = SvSTATE (prev_sv);
844 ta->next = SvSTATE (next); 1491 ta->next = SvSTATE (next_sv);
845 ta->flags = flags; 1492 TRANSFER_CHECK (*ta);
846} 1493}
847 1494
848static void 1495static void
849api_transfer (SV *prev, SV *next, int flags) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
850{ 1497{
851 dTHX;
852 struct transfer_args ta; 1498 struct coro_transfer_args ta;
853 1499
854 prepare_transfer (&ta, prev, next, flags); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
855 TRANSFER (ta); 1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
856} 1525}
857 1526
858/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
859 1528
860#define PRIO_MAX 3 1529INLINE void
861#define PRIO_HIGH 1 1530coro_enq (pTHX_ struct coro *coro)
862#define PRIO_NORMAL 0
863#define PRIO_LOW -1
864#define PRIO_IDLE -3
865#define PRIO_MIN -4
866
867/* for Coro.pm */
868static GV *coro_current, *coro_idle;
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void
873coro_enq (SV *coro_sv)
874{ 1531{
875 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
876 coro_nready++;
877} 1533}
878 1534
879static SV * 1535INLINE SV *
880coro_deq (int min_prio) 1536coro_deq (pTHX)
881{ 1537{
882 int prio = PRIO_MAX - PRIO_MIN; 1538 int prio;
883 1539
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 1541 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 1542 return av_shift (coro_ready [prio]);
893 }
894 1543
895 return 0; 1544 return 0;
896} 1545}
897 1546
898static int 1547static int
899api_ready (SV *coro_sv) 1548api_ready (pTHX_ SV *coro_sv)
900{ 1549{
901 struct coro *coro; 1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
902 1553
903 if (SvROK (coro_sv)) 1554 if (SvROK (coro_sv))
904 coro_sv = SvRV (coro_sv); 1555 coro_sv = SvRV (coro_sv);
905 1556
906 coro = SvSTATE (coro_sv); 1557 coro = SvSTATE (coro_sv);
907 1558
908 if (coro->flags & CF_READY) 1559 if (coro->flags & CF_READY)
909 return 0; 1560 return 0;
910 1561
911 if (coro->flags & CF_RUNNING)
912 croak ("Coro::ready called on currently running coroutine");
913
914 coro->flags |= CF_READY; 1562 coro->flags |= CF_READY;
915 1563
916 LOCK; 1564 sv_hook = coro_nready ? 0 : coro_readyhook;
917 coro_enq (SvREFCNT_inc (coro_sv)); 1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
918 UNLOCK; 1566
1567 coro_enq (aTHX_ coro);
1568 ++coro_nready;
1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
919 1587
920 return 1; 1588 return 1;
921} 1589}
922 1590
923static int 1591static int
924api_is_ready (SV *coro_sv) 1592api_is_ready (pTHX_ SV *coro_sv)
925{ 1593{
926 return !!SvSTATE (coro_sv)->flags & CF_READY; 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
927} 1595}
928 1596
929static void 1597INLINE void
930prepare_schedule (struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
931{ 1599{
932 SV *current, *prev, *next; 1600 SV *prev_sv, *next_sv;
933
934 current = GvSV (coro_current);
935 1601
936 for (;;) 1602 for (;;)
937 { 1603 {
938 LOCK;
939 next = coro_deq (PRIO_MIN); 1604 next_sv = coro_deq (aTHX);
940 UNLOCK;
941 1605
942 if (next) 1606 /* nothing to schedule: call the idle handler */
943 break; 1607 if (expect_false (!next_sv))
944
945 { 1608 {
946 dSP; 1609 dSP;
947 1610
948 ENTER; 1611 ENTER;
949 SAVETMPS; 1612 SAVETMPS;
950 1613
951 PUSHMARK (SP); 1614 PUSHMARK (SP);
952 PUTBACK; 1615 PUTBACK;
953 call_sv (GvSV (coro_idle), G_DISCARD); 1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
954 1617
955 FREETMPS; 1618 FREETMPS;
956 LEAVE; 1619 LEAVE;
1620 continue;
957 } 1621 }
958 }
959 1622
960 prev = SvRV (current); 1623 ta->next = SvSTATE_hv (next_sv);
961 SvRV (current) = next; 1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 break;
1635 }
962 1636
963 /* free this only after the transfer */ 1637 /* free this only after the transfer */
964 LOCK; 1638 prev_sv = SvRV (coro_current);
965 free_coro_mortal ();
966 UNLOCK;
967 coro_mortal = prev;
968
969 ta->prev = SvSTATE (prev); 1639 ta->prev = SvSTATE_hv (prev_sv);
970 ta->next = SvSTATE (next); 1640 TRANSFER_CHECK (*ta);
971 ta->flags = TRANSFER_SAVE_ALL; 1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
972
973 ta->next->flags &= ~CF_READY; 1642 ta->next->flags &= ~CF_READY;
974} 1643 SvRV_set (coro_current, next_sv);
975 1644
976static void 1645 free_coro_mortal (aTHX);
1646 coro_mortal = prev_sv;
1647}
1648
1649INLINE void
977prepare_cede (struct transfer_args *ta) 1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
978{ 1651{
979 api_ready (GvSV (coro_current)); 1652 api_ready (aTHX_ coro_current);
980
981 prepare_schedule (ta); 1653 prepare_schedule (aTHX_ ta);
982} 1654}
983 1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
984static void 1670static void
985api_schedule (void) 1671api_schedule (pTHX)
986{ 1672{
987 dTHX;
988 struct transfer_args ta; 1673 struct coro_transfer_args ta;
989 1674
990 prepare_schedule (&ta); 1675 prepare_schedule (aTHX_ &ta);
991 TRANSFER (ta); 1676 TRANSFER (ta, 1);
992} 1677}
993 1678
994static void 1679static int
995api_cede (void) 1680api_cede (pTHX)
996{ 1681{
997 dTHX;
998 struct transfer_args ta; 1682 struct coro_transfer_args ta;
999 1683
1000 prepare_cede (&ta); 1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1001 TRANSFER (ta); 1688 TRANSFER (ta, 1);
1689 return 1;
1690 }
1691 else
1692 return 0;
1002} 1693}
1003 1694
1695static int
1696api_cede_notself (pTHX)
1697{
1698 if (coro_nready)
1699 {
1700 struct coro_transfer_args ta;
1701
1702 prepare_cede_notself (aTHX_ &ta);
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
1827}
1828
1829static SV *
1830coro_new_rouse_cb (pTHX)
1831{
1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1836
1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1838 SvREFCNT_dec (data); /* magicext increases the refcount */
1839
1840 SvREFCNT_dec (coro->rouse_cb);
1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
1946 {
1947 /* ampersand-form of call, use @_ instead of stack */
1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 /*AvARRAY (av) = ary;*/
2149 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2150 AvMAX (av) = 1;
2151 AvFILLp (av) = 0;
2152 ary [0] = newSViv (count);
2153
2154 return newRV_noinc ((SV *)av);
2155}
2156
2157/* semaphore */
2158
2159static void
2160coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2161{
2162 SV *count_sv = AvARRAY (av)[0];
2163 IV count = SvIVX (count_sv);
2164
2165 count += adjust;
2166 SvIVX (count_sv) = count;
2167
2168 /* now wake up as many waiters as are expected to lock */
2169 while (count > 0 && AvFILLp (av) > 0)
2170 {
2171 SV *cb;
2172
2173 /* swap first two elements so we can shift a waiter */
2174 AvARRAY (av)[0] = AvARRAY (av)[1];
2175 AvARRAY (av)[1] = count_sv;
2176 cb = av_shift (av);
2177
2178 if (SvOBJECT (cb))
2179 {
2180 api_ready (aTHX_ cb);
2181 --count;
2182 }
2183 else if (SvTYPE (cb) == SVt_PVCV)
2184 {
2185 dSP;
2186 PUSHMARK (SP);
2187 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2188 PUTBACK;
2189 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2190 }
2191
2192 SvREFCNT_dec (cb);
2193 }
2194}
2195
2196static void
2197coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2198{
2199 /* call $sem->adjust (0) to possibly wake up some other waiters */
2200 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2201}
2202
2203static int
2204slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2205{
2206 AV *av = (AV *)frame->data;
2207 SV *count_sv = AvARRAY (av)[0];
2208
2209 /* if we are about to throw, don't actually acquire the lock, just throw */
2210 if (CORO_THROW)
2211 return 0;
2212 else if (SvIVX (count_sv) > 0)
2213 {
2214 SvSTATE_current->on_destroy = 0;
2215
2216 if (acquire)
2217 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2218 else
2219 coro_semaphore_adjust (aTHX_ av, 0);
2220
2221 return 0;
2222 }
2223 else
2224 {
2225 int i;
2226 /* if we were woken up but can't down, we look through the whole */
2227 /* waiters list and only add us if we aren't in there already */
2228 /* this avoids some degenerate memory usage cases */
2229
2230 for (i = 1; i <= AvFILLp (av); ++i)
2231 if (AvARRAY (av)[i] == SvRV (coro_current))
2232 return 1;
2233
2234 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2235 return 1;
2236 }
2237}
2238
2239static int
2240slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2241{
2242 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2243}
2244
2245static int
2246slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2247{
2248 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2249}
2250
2251static void
2252slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2253{
2254 AV *av = (AV *)SvRV (arg [0]);
2255
2256 if (SvIVX (AvARRAY (av)[0]) > 0)
2257 {
2258 frame->data = (void *)av;
2259 frame->prepare = prepare_nop;
2260 }
2261 else
2262 {
2263 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2264
2265 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2266 frame->prepare = prepare_schedule;
2267
2268 /* to avoid race conditions when a woken-up coro gets terminated */
2269 /* we arrange for a temporary on_destroy that calls adjust (0) */
2270 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2271 }
2272}
2273
2274static void
2275slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2276{
2277 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2278 frame->check = slf_check_semaphore_down;
2279}
2280
2281static void
2282slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 if (items >= 2)
2285 {
2286 /* callback form */
2287 AV *av = (AV *)SvRV (arg [0]);
2288 HV *st;
2289 GV *gvp;
2290 CV *cb_cv = sv_2cv (arg [1], &st, &gvp, 0);
2291
2292 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2293
2294 if (SvIVX (AvARRAY (av)[0]) > 0)
2295 coro_semaphore_adjust (aTHX_ av, 0);
2296
2297 frame->prepare = prepare_nop;
2298 frame->check = slf_check_nop;
2299 }
2300 else
2301 {
2302 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2303 frame->check = slf_check_semaphore_wait;
2304 }
2305}
2306
2307/* signal */
2308
2309static void
2310coro_signal_wake (pTHX_ AV *av, int count)
2311{
2312 SvIVX (AvARRAY (av)[0]) = 0;
2313
2314 /* now signal count waiters */
2315 while (count > 0 && AvFILLp (av) > 0)
2316 {
2317 SV *cb;
2318
2319 /* swap first two elements so we can shift a waiter */
2320 cb = AvARRAY (av)[0];
2321 AvARRAY (av)[0] = AvARRAY (av)[1];
2322 AvARRAY (av)[1] = cb;
2323
2324 cb = av_shift (av);
2325
2326 api_ready (aTHX_ cb);
2327 sv_setiv (cb, 0); /* signal waiter */
2328 SvREFCNT_dec (cb);
2329
2330 --count;
2331 }
2332}
2333
2334static int
2335slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2336{
2337 /* if we are about to throw, also stop waiting */
2338 return SvROK ((SV *)frame->data) && !CORO_THROW;
2339}
2340
2341static void
2342slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2343{
2344 AV *av = (AV *)SvRV (arg [0]);
2345
2346 if (SvIVX (AvARRAY (av)[0]))
2347 {
2348 SvIVX (AvARRAY (av)[0]) = 0;
2349 frame->prepare = prepare_nop;
2350 frame->check = slf_check_nop;
2351 }
2352 else
2353 {
2354 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2355
2356 av_push (av, waiter);
2357
2358 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2359 frame->prepare = prepare_schedule;
2360 frame->check = slf_check_signal_wait;
2361 }
2362}
2363
2364/*****************************************************************************/
2365/* Coro::AIO */
2366
2367#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2368
2369/* helper storage struct */
2370struct io_state
2371{
2372 int errorno;
2373 I32 laststype; /* U16 in 5.10.0 */
2374 int laststatval;
2375 Stat_t statcache;
2376};
2377
2378static void
2379coro_aio_callback (pTHX_ CV *cv)
2380{
2381 dXSARGS;
2382 AV *state = (AV *)GENSUB_ARG;
2383 SV *coro = av_pop (state);
2384 SV *data_sv = newSV (sizeof (struct io_state));
2385
2386 av_extend (state, items);
2387
2388 sv_upgrade (data_sv, SVt_PV);
2389 SvCUR_set (data_sv, sizeof (struct io_state));
2390 SvPOK_only (data_sv);
2391
2392 {
2393 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2394
2395 data->errorno = errno;
2396 data->laststype = PL_laststype;
2397 data->laststatval = PL_laststatval;
2398 data->statcache = PL_statcache;
2399 }
2400
2401 /* now build the result vector out of all the parameters and the data_sv */
2402 {
2403 int i;
2404
2405 for (i = 0; i < items; ++i)
2406 av_push (state, SvREFCNT_inc_NN (ST (i)));
2407 }
2408
2409 av_push (state, data_sv);
2410
2411 api_ready (aTHX_ coro);
2412 SvREFCNT_dec (coro);
2413 SvREFCNT_dec ((AV *)state);
2414}
2415
2416static int
2417slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2418{
2419 AV *state = (AV *)frame->data;
2420
2421 /* if we are about to throw, return early */
2422 /* this does not cancel the aio request, but at least */
2423 /* it quickly returns */
2424 if (CORO_THROW)
2425 return 0;
2426
2427 /* one element that is an RV? repeat! */
2428 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2429 return 1;
2430
2431 /* restore status */
2432 {
2433 SV *data_sv = av_pop (state);
2434 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2435
2436 errno = data->errorno;
2437 PL_laststype = data->laststype;
2438 PL_laststatval = data->laststatval;
2439 PL_statcache = data->statcache;
2440
2441 SvREFCNT_dec (data_sv);
2442 }
2443
2444 /* push result values */
2445 {
2446 dSP;
2447 int i;
2448
2449 EXTEND (SP, AvFILLp (state) + 1);
2450 for (i = 0; i <= AvFILLp (state); ++i)
2451 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2452
2453 PUTBACK;
2454 }
2455
2456 return 0;
2457}
2458
2459static void
2460slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2461{
2462 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2463 SV *coro_hv = SvRV (coro_current);
2464 struct coro *coro = SvSTATE_hv (coro_hv);
2465
2466 /* put our coroutine id on the state arg */
2467 av_push (state, SvREFCNT_inc_NN (coro_hv));
2468
2469 /* first see whether we have a non-zero priority and set it as AIO prio */
2470 if (coro->prio)
2471 {
2472 dSP;
2473
2474 static SV *prio_cv;
2475 static SV *prio_sv;
2476
2477 if (expect_false (!prio_cv))
2478 {
2479 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2480 prio_sv = newSViv (0);
2481 }
2482
2483 PUSHMARK (SP);
2484 sv_setiv (prio_sv, coro->prio);
2485 XPUSHs (prio_sv);
2486
2487 PUTBACK;
2488 call_sv (prio_cv, G_VOID | G_DISCARD);
2489 }
2490
2491 /* now call the original request */
2492 {
2493 dSP;
2494 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2495 int i;
2496
2497 PUSHMARK (SP);
2498
2499 /* first push all args to the stack */
2500 EXTEND (SP, items + 1);
2501
2502 for (i = 0; i < items; ++i)
2503 PUSHs (arg [i]);
2504
2505 /* now push the callback closure */
2506 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2507
2508 /* now call the AIO function - we assume our request is uncancelable */
2509 PUTBACK;
2510 call_sv ((SV *)req, G_VOID | G_DISCARD);
2511 }
2512
2513 /* now that the requets is going, we loop toll we have a result */
2514 frame->data = (void *)state;
2515 frame->prepare = prepare_schedule;
2516 frame->check = slf_check_aio_req;
2517}
2518
2519static void
2520coro_aio_req_xs (pTHX_ CV *cv)
2521{
2522 dXSARGS;
2523
2524 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2525
2526 XSRETURN_EMPTY;
2527}
2528
2529/*****************************************************************************/
2530
1004MODULE = Coro::State PACKAGE = Coro::State 2531MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1005 2532
1006PROTOTYPES: DISABLE 2533PROTOTYPES: DISABLE
1007 2534
1008BOOT: 2535BOOT:
1009{ 2536{
1010#ifdef USE_ITHREADS 2537#ifdef USE_ITHREADS
1011 MUTEX_INIT (&coro_mutex); 2538# if CORO_PTHREAD
2539 coro_thx = PERL_GET_CONTEXT;
2540# endif
1012#endif 2541#endif
1013 BOOT_PAGESIZE; 2542 BOOT_PAGESIZE;
1014 2543
2544 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2545 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2546
2547 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2548 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2549 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2550
2551 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2552 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2553 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2554
1015 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2555 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1016 2556
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2557 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1018 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2558 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1019 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2559 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2560 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1020 2561
1021 main_mainstack = PL_mainstack; 2562 main_mainstack = PL_mainstack;
2563 main_top_env = PL_top_env;
1022 2564
2565 while (main_top_env->je_prev)
2566 main_top_env = main_top_env->je_prev;
2567
2568 {
2569 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2570
2571 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2572 hv_store_ent (PL_custom_op_names, slf,
2573 newSVpv ("coro_slf", 0), 0);
2574
2575 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2576 hv_store_ent (PL_custom_op_descs, slf,
2577 newSVpv ("coro schedule like function", 0), 0);
2578 }
2579
1023 coroapi.ver = CORO_API_VERSION; 2580 coroapi.ver = CORO_API_VERSION;
2581 coroapi.rev = CORO_API_REVISION;
2582
1024 coroapi.transfer = api_transfer; 2583 coroapi.transfer = api_transfer;
2584
2585 coroapi.sv_state = SvSTATE_;
2586 coroapi.execute_slf = api_execute_slf;
2587 coroapi.prepare_nop = prepare_nop;
2588 coroapi.prepare_schedule = prepare_schedule;
2589 coroapi.prepare_cede = prepare_cede;
2590 coroapi.prepare_cede_notself = prepare_cede_notself;
2591
2592 {
2593 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2594
2595 if (!svp) croak ("Time::HiRes is required");
2596 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2597
2598 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2599 }
1025 2600
1026 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2601 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1027} 2602}
1028 2603
1029SV * 2604SV *
1030new (char *klass, ...) 2605new (char *klass, ...)
1031 CODE: 2606 CODE:
1032{ 2607{
1033 struct coro *coro; 2608 struct coro *coro;
2609 MAGIC *mg;
1034 HV *hv; 2610 HV *hv;
1035 int i; 2611 int i;
1036 2612
1037 Newz (0, coro, 1, struct coro); 2613 Newz (0, coro, 1, struct coro);
1038 coro->args = newAV (); 2614 coro->args = newAV ();
2615 coro->flags = CF_NEW;
1039 2616
2617 if (coro_first) coro_first->prev = coro;
2618 coro->next = coro_first;
2619 coro_first = coro;
2620
1040 hv = newHV (); 2621 coro->hv = hv = newHV ();
1041 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2622 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2623 mg->mg_flags |= MGf_DUP;
1042 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2624 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1043 2625
2626 av_extend (coro->args, items - 1);
1044 for (i = 1; i < items; i++) 2627 for (i = 1; i < items; i++)
1045 av_push (coro->args, newSVsv (ST (i))); 2628 av_push (coro->args, newSVsv (ST (i)));
1046} 2629}
1047 OUTPUT: 2630 OUTPUT:
1048 RETVAL 2631 RETVAL
1049 2632
1050void 2633void
1051_set_stacklevel (...) 2634transfer (...)
1052 ALIAS: 2635 PROTOTYPE: $$
1053 Coro::State::transfer = 1 2636 CODE:
1054 Coro::schedule = 2 2637 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1055 Coro::cede = 3
1056 Coro::Cont::yield = 4
1057 CODE:
1058{
1059 struct transfer_args ta;
1060 2638
1061 switch (ix) 2639bool
1062 { 2640_destroy (SV *coro_sv)
1063 case 0: 2641 CODE:
1064 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2642 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1065 ta.next = 0; 2643 OUTPUT:
1066 ta.flags = TRANSFER_SET_STACKLEVEL; 2644 RETVAL
1067 break;
1068
1069 case 1:
1070 if (items != 3)
1071 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1072
1073 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1074 break;
1075
1076 case 2:
1077 prepare_schedule (&ta);
1078 break;
1079
1080 case 3:
1081 prepare_cede (&ta);
1082 break;
1083
1084 case 4:
1085 {
1086 SV *yieldstack;
1087 SV *sv;
1088 AV *defav = GvAV (PL_defgv);
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1104 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1105 ta.flags = 0;
1106 SvREFCNT_dec (sv);
1107 }
1108 break;
1109
1110 }
1111
1112 TRANSFER (ta);
1113}
1114 2645
1115void 2646void
1116_clone_state_from (SV *dst, SV *src)
1117 CODE:
1118{
1119 struct coro *coro_src = SvSTATE (src);
1120
1121 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1122
1123 ++coro_src->refcnt;
1124 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1125}
1126
1127void
1128_exit (code) 2647_exit (int code)
1129 int code
1130 PROTOTYPE: $ 2648 PROTOTYPE: $
1131 CODE: 2649 CODE:
1132 _exit (code); 2650 _exit (code);
1133 2651
1134int 2652int
2653cctx_stacksize (int new_stacksize = 0)
2654 PROTOTYPE: ;$
2655 CODE:
2656 RETVAL = cctx_stacksize;
2657 if (new_stacksize)
2658 {
2659 cctx_stacksize = new_stacksize;
2660 ++cctx_gen;
2661 }
2662 OUTPUT:
2663 RETVAL
2664
2665int
2666cctx_max_idle (int max_idle = 0)
2667 PROTOTYPE: ;$
2668 CODE:
2669 RETVAL = cctx_max_idle;
2670 if (max_idle > 1)
2671 cctx_max_idle = max_idle;
2672 OUTPUT:
2673 RETVAL
2674
2675int
1135cctx_count () 2676cctx_count ()
2677 PROTOTYPE:
1136 CODE: 2678 CODE:
1137 RETVAL = cctx_count; 2679 RETVAL = cctx_count;
1138 OUTPUT: 2680 OUTPUT:
1139 RETVAL 2681 RETVAL
1140 2682
1141int 2683int
1142cctx_idle () 2684cctx_idle ()
2685 PROTOTYPE:
1143 CODE: 2686 CODE:
1144 RETVAL = cctx_idle; 2687 RETVAL = cctx_idle;
1145 OUTPUT: 2688 OUTPUT:
1146 RETVAL 2689 RETVAL
1147 2690
2691void
2692list ()
2693 PROTOTYPE:
2694 PPCODE:
2695{
2696 struct coro *coro;
2697 for (coro = coro_first; coro; coro = coro->next)
2698 if (coro->hv)
2699 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2700}
2701
2702void
2703call (Coro::State coro, SV *coderef)
2704 ALIAS:
2705 eval = 1
2706 CODE:
2707{
2708 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2709 {
2710 struct coro temp;
2711
2712 if (!(coro->flags & CF_RUNNING))
2713 {
2714 PUTBACK;
2715 save_perl (aTHX_ &temp);
2716 load_perl (aTHX_ coro);
2717 }
2718
2719 {
2720 dSP;
2721 ENTER;
2722 SAVETMPS;
2723 PUTBACK;
2724 PUSHSTACK;
2725 PUSHMARK (SP);
2726
2727 if (ix)
2728 eval_sv (coderef, 0);
2729 else
2730 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2731
2732 POPSTACK;
2733 SPAGAIN;
2734 FREETMPS;
2735 LEAVE;
2736 PUTBACK;
2737 }
2738
2739 if (!(coro->flags & CF_RUNNING))
2740 {
2741 save_perl (aTHX_ coro);
2742 load_perl (aTHX_ &temp);
2743 SPAGAIN;
2744 }
2745 }
2746}
2747
2748SV *
2749is_ready (Coro::State coro)
2750 PROTOTYPE: $
2751 ALIAS:
2752 is_ready = CF_READY
2753 is_running = CF_RUNNING
2754 is_new = CF_NEW
2755 is_destroyed = CF_DESTROYED
2756 CODE:
2757 RETVAL = boolSV (coro->flags & ix);
2758 OUTPUT:
2759 RETVAL
2760
2761void
2762throw (Coro::State self, SV *throw = &PL_sv_undef)
2763 PROTOTYPE: $;$
2764 CODE:
2765{
2766 struct coro *current = SvSTATE_current;
2767 SV **throwp = self == current ? &CORO_THROW : &self->except;
2768 SvREFCNT_dec (*throwp);
2769 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2770}
2771
2772void
2773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2774 PROTOTYPE: $;$
2775 C_ARGS: aTHX_ coro, flags
2776
2777SV *
2778has_cctx (Coro::State coro)
2779 PROTOTYPE: $
2780 CODE:
2781 RETVAL = boolSV (!!coro->cctx);
2782 OUTPUT:
2783 RETVAL
2784
2785int
2786is_traced (Coro::State coro)
2787 PROTOTYPE: $
2788 CODE:
2789 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2790 OUTPUT:
2791 RETVAL
2792
2793UV
2794rss (Coro::State coro)
2795 PROTOTYPE: $
2796 ALIAS:
2797 usecount = 1
2798 CODE:
2799 switch (ix)
2800 {
2801 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2802 case 1: RETVAL = coro->usecount; break;
2803 }
2804 OUTPUT:
2805 RETVAL
2806
2807void
2808force_cctx ()
2809 PROTOTYPE:
2810 CODE:
2811 SvSTATE_current->cctx->idle_sp = 0;
2812
2813void
2814swap_defsv (Coro::State self)
2815 PROTOTYPE: $
2816 ALIAS:
2817 swap_defav = 1
2818 CODE:
2819 if (!self->slot)
2820 croak ("cannot swap state with coroutine that has no saved state,");
2821 else
2822 {
2823 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2824 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2825
2826 SV *tmp = *src; *src = *dst; *dst = tmp;
2827 }
2828
2829
1148MODULE = Coro::State PACKAGE = Coro 2830MODULE = Coro::State PACKAGE = Coro
1149 2831
1150BOOT: 2832BOOT:
1151{ 2833{
1152 int i; 2834 int i;
1153 2835
2836 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2837 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2838 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2839
2840 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2841 SvREADONLY_on (coro_current);
2842
1154 coro_stash = gv_stashpv ("Coro", TRUE); 2843 coro_stash = gv_stashpv ("Coro", TRUE);
1155 2844
1156 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2845 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1157 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2846 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1158 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2847 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1159 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2848 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1160 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2849 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1161 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2850 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1162 2851
1163 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1164 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1165
1166 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2852 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1167 coro_ready[i] = newAV (); 2853 coro_ready[i] = newAV ();
1168 2854
1169 { 2855 {
1170 SV *sv = perl_get_sv("Coro::API", 1); 2856 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1171 2857
1172 coroapi.schedule = api_schedule; 2858 coroapi.schedule = api_schedule;
1173 coroapi.cede = api_cede; 2859 coroapi.cede = api_cede;
2860 coroapi.cede_notself = api_cede_notself;
1174 coroapi.ready = api_ready; 2861 coroapi.ready = api_ready;
1175 coroapi.is_ready = api_is_ready; 2862 coroapi.is_ready = api_is_ready;
1176 coroapi.nready = &coro_nready; 2863 coroapi.nready = coro_nready;
1177 coroapi.current = coro_current; 2864 coroapi.current = coro_current;
1178 2865
1179 GCoroAPI = &coroapi; 2866 /*GCoroAPI = &coroapi;*/
1180 sv_setiv (sv, (IV)&coroapi); 2867 sv_setiv (sv, (IV)&coroapi);
1181 SvREADONLY_on (sv); 2868 SvREADONLY_on (sv);
1182 } 2869 }
1183} 2870}
1184 2871
2872void
2873schedule (...)
2874 CODE:
2875 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2876
2877void
2878cede (...)
2879 CODE:
2880 CORO_EXECUTE_SLF_XS (slf_init_cede);
2881
2882void
2883cede_notself (...)
2884 CODE:
2885 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2886
2887void
2888_set_current (SV *current)
2889 PROTOTYPE: $
2890 CODE:
2891 SvREFCNT_dec (SvRV (coro_current));
2892 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2893
2894void
2895_set_readyhook (SV *hook)
2896 PROTOTYPE: $
2897 CODE:
2898 SvREFCNT_dec (coro_readyhook);
2899 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2900
1185int 2901int
1186prio (Coro::State coro, int newprio = 0) 2902prio (Coro::State coro, int newprio = 0)
2903 PROTOTYPE: $;$
1187 ALIAS: 2904 ALIAS:
1188 nice = 1 2905 nice = 1
1189 CODE: 2906 CODE:
1190{ 2907{
1191 RETVAL = coro->prio; 2908 RETVAL = coro->prio;
1192 2909
1193 if (items > 1) 2910 if (items > 1)
1194 { 2911 {
1195 if (ix) 2912 if (ix)
1196 newprio += coro->prio; 2913 newprio = coro->prio - newprio;
1197 2914
1198 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2915 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1199 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2916 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1200 2917
1201 coro->prio = newprio; 2918 coro->prio = newprio;
1202 } 2919 }
1203} 2920}
2921 OUTPUT:
2922 RETVAL
1204 2923
1205SV * 2924SV *
1206ready (SV *self) 2925ready (SV *self)
1207 PROTOTYPE: $ 2926 PROTOTYPE: $
1208 CODE: 2927 CODE:
1209 RETVAL = boolSV (api_ready (self)); 2928 RETVAL = boolSV (api_ready (aTHX_ self));
1210 OUTPUT:
1211 RETVAL
1212
1213SV *
1214is_ready (SV *self)
1215 PROTOTYPE: $
1216 CODE:
1217 RETVAL = boolSV (api_is_ready (self));
1218 OUTPUT: 2929 OUTPUT:
1219 RETVAL 2930 RETVAL
1220 2931
1221int 2932int
1222nready (...) 2933nready (...)
… …
1224 CODE: 2935 CODE:
1225 RETVAL = coro_nready; 2936 RETVAL = coro_nready;
1226 OUTPUT: 2937 OUTPUT:
1227 RETVAL 2938 RETVAL
1228 2939
1229MODULE = Coro::State PACKAGE = Coro::AIO 2940# for async_pool speedup
2941void
2942_pool_1 (SV *cb)
2943 CODE:
2944{
2945 HV *hv = (HV *)SvRV (coro_current);
2946 struct coro *coro = SvSTATE_hv ((SV *)hv);
2947 AV *defav = GvAV (PL_defgv);
2948 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2949 AV *invoke_av;
2950 int i, len;
2951
2952 if (!invoke)
2953 {
2954 SV *old = PL_diehook;
2955 PL_diehook = 0;
2956 SvREFCNT_dec (old);
2957 croak ("\3async_pool terminate\2\n");
2958 }
2959
2960 SvREFCNT_dec (coro->saved_deffh);
2961 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2962
2963 hv_store (hv, "desc", sizeof ("desc") - 1,
2964 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2965
2966 invoke_av = (AV *)SvRV (invoke);
2967 len = av_len (invoke_av);
2968
2969 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2970
2971 if (len > 0)
2972 {
2973 av_fill (defav, len - 1);
2974 for (i = 0; i < len; ++i)
2975 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2976 }
2977}
2978
2979void
2980_pool_2 (SV *cb)
2981 CODE:
2982{
2983 HV *hv = (HV *)SvRV (coro_current);
2984 struct coro *coro = SvSTATE_hv ((SV *)hv);
2985
2986 sv_setsv (cb, &PL_sv_undef);
2987
2988 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2989 coro->saved_deffh = 0;
2990
2991 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2992 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2993 {
2994 SV *old = PL_diehook;
2995 PL_diehook = 0;
2996 SvREFCNT_dec (old);
2997 croak ("\3async_pool terminate\2\n");
2998 }
2999
3000 av_clear (GvAV (PL_defgv));
3001 hv_store (hv, "desc", sizeof ("desc") - 1,
3002 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3003
3004 coro->prio = 0;
3005
3006 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3007 api_trace (aTHX_ coro_current, 0);
3008
3009 av_push (av_async_pool, newSVsv (coro_current));
3010}
1230 3011
1231SV * 3012SV *
1232_get_state () 3013rouse_cb ()
3014 PROTOTYPE:
1233 CODE: 3015 CODE:
1234{ 3016 RETVAL = coro_new_rouse_cb (aTHX);
1235 struct {
1236 int errorno;
1237 int laststype;
1238 int laststatval;
1239 Stat_t statcache;
1240 } data;
1241
1242 data.errorno = errno;
1243 data.laststype = PL_laststype;
1244 data.laststatval = PL_laststatval;
1245 data.statcache = PL_statcache;
1246
1247 RETVAL = newSVpvn ((char *)&data, sizeof data);
1248}
1249 OUTPUT: 3017 OUTPUT:
1250 RETVAL 3018 RETVAL
1251 3019
1252void 3020void
1253_set_state (char *data_) 3021rouse_wait (...)
1254 PROTOTYPE: $ 3022 PROTOTYPE: ;$
3023 PPCODE:
3024 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3025
3026
3027MODULE = Coro::State PACKAGE = PerlIO::cede
3028
3029BOOT:
3030 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3031
3032
3033MODULE = Coro::State PACKAGE = Coro::Semaphore
3034
3035SV *
3036new (SV *klass, SV *count = 0)
1255 CODE: 3037 CODE:
3038 RETVAL = sv_bless (
3039 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3040 GvSTASH (CvGV (cv))
3041 );
3042 OUTPUT:
3043 RETVAL
3044
3045# helper for Coro::Channel
3046SV *
3047_alloc (int count)
3048 CODE:
3049 RETVAL = coro_waitarray_new (aTHX_ count);
3050 OUTPUT:
3051 RETVAL
3052
3053SV *
3054count (SV *self)
3055 CODE:
3056 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3057 OUTPUT:
3058 RETVAL
3059
3060void
3061up (SV *self, int adjust = 1)
3062 ALIAS:
3063 adjust = 1
3064 CODE:
3065 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3066
3067void
3068down (...)
3069 CODE:
3070 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3071
3072void
3073wait (...)
3074 CODE:
3075 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3076
3077void
3078try (SV *self)
3079 PPCODE:
1256{ 3080{
1257 struct { 3081 AV *av = (AV *)SvRV (self);
3082 SV *count_sv = AvARRAY (av)[0];
3083 IV count = SvIVX (count_sv);
3084
3085 if (count > 0)
3086 {
3087 --count;
3088 SvIVX (count_sv) = count;
3089 XSRETURN_YES;
3090 }
3091 else
3092 XSRETURN_NO;
3093}
3094
3095void
3096waiters (SV *self)
3097 PPCODE:
3098{
3099 AV *av = (AV *)SvRV (self);
3100 int wcount = AvFILLp (av) + 1 - 1;
3101
3102 if (GIMME_V == G_SCALAR)
3103 XPUSHs (sv_2mortal (newSViv (wcount)));
3104 else
3105 {
1258 int errorno; 3106 int i;
1259 int laststype; 3107 EXTEND (SP, wcount);
1260 int laststatval; 3108 for (i = 1; i <= wcount; ++i)
1261 Stat_t statcache; 3109 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1262 } *data = (void *)data_; 3110 }
1263
1264 errno = data->errorno;
1265 PL_laststype = data->laststype;
1266 PL_laststatval = data->laststatval;
1267 PL_statcache = data->statcache;
1268} 3111}
3112
3113MODULE = Coro::State PACKAGE = Coro::Signal
3114
3115SV *
3116new (SV *klass)
3117 CODE:
3118 RETVAL = sv_bless (
3119 coro_waitarray_new (aTHX_ 0),
3120 GvSTASH (CvGV (cv))
3121 );
3122 OUTPUT:
3123 RETVAL
3124
3125void
3126wait (...)
3127 CODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3129
3130void
3131broadcast (SV *self)
3132 CODE:
3133{
3134 AV *av = (AV *)SvRV (self);
3135 coro_signal_wake (aTHX_ av, AvFILLp (av));
3136}
3137
3138void
3139send (SV *self)
3140 CODE:
3141{
3142 AV *av = (AV *)SvRV (self);
3143
3144 if (AvFILLp (av))
3145 coro_signal_wake (aTHX_ av, 1);
3146 else
3147 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3148}
3149
3150IV
3151awaited (SV *self)
3152 CODE:
3153 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3154 OUTPUT:
3155 RETVAL
3156
3157
3158MODULE = Coro::State PACKAGE = Coro::AnyEvent
3159
3160BOOT:
3161 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3162
3163void
3164_schedule (...)
3165 CODE:
3166{
3167 static int incede;
3168
3169 api_cede_notself (aTHX);
3170
3171 ++incede;
3172 while (coro_nready >= incede && api_cede (aTHX))
3173 ;
3174
3175 sv_setsv (sv_activity, &PL_sv_undef);
3176 if (coro_nready >= incede)
3177 {
3178 PUSHMARK (SP);
3179 PUTBACK;
3180 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3181 }
3182
3183 --incede;
3184}
3185
3186
3187MODULE = Coro::State PACKAGE = Coro::AIO
3188
3189void
3190_register (char *target, char *proto, SV *req)
3191 CODE:
3192{
3193 HV *st;
3194 GV *gvp;
3195 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3196 /* newXSproto doesn't return the CV on 5.8 */
3197 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3198 sv_setpv ((SV *)slf_cv, proto);
3199 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3200}
3201

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