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Comparing Coro/Coro/State.xs (file contents):
Revision 1.115 by root, Fri Dec 1 13:36:08 2006 UTC vs.
Revision 1.309 by root, Wed Nov 19 15:29:57 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * 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
80#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
81#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
82 131
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
84 133
85#if __GNUC__ >= 3 134#if __GNUC__ >= 3
86# 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
87#else 138#else
88# define attribute(x) 139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
89#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
90 146
91#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
92 148
93#include "CoroAPI.h" 149#include "CoroAPI.h"
94 150#define GCoroAPI (&coroapi) /* very sneaky */
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96 151
97#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 153# if CORO_PTHREAD
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif 155# endif
156#endif
105 157
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;
106static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
107static 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;
108static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
170static CV *coro_run_cv;
109static SV *coro_mortal; /* will be freed after next transfer */ 171static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
172
173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
110 186
111static struct coro_cctx *cctx_first; 187static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 188static int cctx_count, cctx_idle;
113 189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
114/* this is a structure representing a c-level coroutine */ 199/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 200typedef struct coro_cctx
201{
116 struct coro_cctx *next; 202 struct coro_cctx *next;
117 203
118 /* the stack */ 204 /* the stack */
119 void *sptr; 205 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
121 207
122 /* cpu state */ 208 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 211 JMPENV *top_env;
125 coro_context cctx; 212 coro_context cctx;
126 213
127 int inuse; 214 U32 gen;
128
129#if USE_VALGRIND 215#if CORO_USE_VALGRIND
130 int valgrind_id; 216 int valgrind_id;
131#endif 217#endif
218 unsigned char flags;
132} coro_cctx; 219} coro_cctx;
133 220
134enum { 221enum {
135 CF_RUNNING, /* coroutine is running */ 222 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY, /* coroutine is ready */ 223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
137}; 226};
138 227
139/* this is a structure representing a perl-level coroutine */ 228/* the structure where most of the perl state is stored, overlaid on the cxstack */
140struct coro { 229typedef struct
141 /* the c coroutine allocated to this perl coroutine, if any */ 230{
142 coro_cctx *cctx; 231 SV *defsv;
143
144 /* data associated with this coroutine (initial args) */
145 AV *args;
146 int refcnt;
147 int flags;
148
149 /* optionally saved, might be zero */
150 AV *defav; 232 AV *defav;
151 SV *defsv;
152 SV *errsv; 233 SV *errsv;
153 234 SV *irsgv;
154#define VAR(name,type) type name; 235#define VAR(name,type) type name;
155# include "state.h" 236# include "state.h"
156#undef VAR 237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
243struct coro {
244 /* the C coroutine allocated to this perl coroutine, if any */
245 coro_cctx *cctx;
246
247 /* state data */
248 struct CoroSLF slf_frame; /* saved slf frame */
249 AV *mainstack;
250 perl_slots *slot; /* basically the saved sp */
251
252 CV *startcv; /* the CV to execute */
253 AV *args; /* data associated with this coroutine (initial args) */
254 int refcnt; /* coroutines are refcounted, yes */
255 int flags; /* CF_ flags */
256 HV *hv; /* the perl hash associated with this coro, if any */
257 void (*on_destroy)(pTHX_ struct coro *coro);
258
259 /* statistics */
260 int usecount; /* number of transfers to this coro */
157 261
158 /* coro process data */ 262 /* coro process data */
159 int prio; 263 int prio;
264 SV *except; /* exception to be thrown */
265 SV *rouse_cb;
266
267 /* async_pool */
268 SV *saved_deffh;
269
270 /* linked list */
271 struct coro *next, *prev;
160}; 272};
161 273
162typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
163typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
164 276
277/* the following variables are effectively part of the perl context */
278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define PRIO_MAX 3
285#define PRIO_HIGH 1
286#define PRIO_NORMAL 0
287#define PRIO_LOW -1
288#define PRIO_IDLE -3
289#define PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
295static struct coro *coro_first;
296#define coro_nready coroapi.nready
297
298/** lowlevel stuff **********************************************************/
299
300static SV *
301coro_get_sv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_sv (name, create);
306#endif
307 return get_sv (name, create);
308}
309
165static AV * 310static AV *
311coro_get_av (pTHX_ const char *name, int create)
312{
313#if PERL_VERSION_ATLEAST (5,10,0)
314 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
315 get_av (name, create);
316#endif
317 return get_av (name, create);
318}
319
320static HV *
321coro_get_hv (pTHX_ const char *name, int create)
322{
323#if PERL_VERSION_ATLEAST (5,10,0)
324 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
325 get_hv (name, create);
326#endif
327 return get_hv (name, create);
328}
329
330/* may croak */
331INLINE CV *
332coro_sv_2cv (SV *sv)
333{
334 HV *st;
335 GV *gvp;
336 return sv_2cv (sv, &st, &gvp, 0);
337}
338
339static AV *
166coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
167{ 341{
168 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
169 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
170 344
171 newpadlist = newAV (); 345 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
173#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#else 349#else
176 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
177#endif 351#endif
178 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
179 --AvFILLp (padlist); 353 --AvFILLp (padlist);
180 354
181 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
182 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
183 357
184 return newpadlist; 358 return newpadlist;
185} 359}
186 360
187static void 361static void
188free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
189{ 363{
190 /* may be during global destruction */ 364 /* may be during global destruction */
191 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
192 { 366 {
193 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
214 AV *padlist; 388 AV *padlist;
215 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
216 390
217 /* casting is fun. */ 391 /* casting is fun. */
218 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
220 394
221 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
222 396
223 return 0; 397 return 0;
224} 398}
225 399
400#define CORO_MAGIC_type_cv 26
226#define PERL_MAGIC_coro PERL_MAGIC_ext 401#define CORO_MAGIC_type_state PERL_MAGIC_ext
227 402
228static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
229 407
230#define CORO_MAGIC(cv) \ 408#define CORO_MAGIC_NN(sv, type) \
409 (expect_true (SvMAGIC (sv)->mg_type == type) \
231 SvMAGIC (cv) \ 410 ? SvMAGIC (sv) \
232 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 411 : mg_find (sv, type))
233 ? SvMAGIC (cv) \ 412
234 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 413#define CORO_MAGIC(sv, type) \
414 (expect_true (SvMAGIC (sv)) \
415 ? CORO_MAGIC_NN (sv, type) \
235 : 0 416 : 0)
417
418#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
419#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
420
421INLINE struct coro *
422SvSTATE_ (pTHX_ SV *coro)
423{
424 HV *stash;
425 MAGIC *mg;
426
427 if (SvROK (coro))
428 coro = SvRV (coro);
429
430 if (expect_false (SvTYPE (coro) != SVt_PVHV))
431 croak ("Coro::State object required");
432
433 stash = SvSTASH (coro);
434 if (expect_false (stash != coro_stash && stash != coro_state_stash))
435 {
436 /* very slow, but rare, check */
437 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
438 croak ("Coro::State object required");
439 }
440
441 mg = CORO_MAGIC_state (coro);
442 return (struct coro *)mg->mg_ptr;
443}
444
445#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
446
447/* faster than SvSTATE, but expects a coroutine hv */
448#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
449#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
236 450
237/* the next two functions merely cache the padlists */ 451/* the next two functions merely cache the padlists */
238static void 452static void
239get_padlist (CV *cv) 453get_padlist (pTHX_ CV *cv)
240{ 454{
241 MAGIC *mg = CORO_MAGIC (cv); 455 MAGIC *mg = CORO_MAGIC_cv (cv);
242 AV *av; 456 AV *av;
243 457
244 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 458 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
245 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 459 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246 else 460 else
247 { 461 {
248#if 0 462#if CORO_PREFER_PERL_FUNCTIONS
249 /* this is probably cleaner, but also slower? */ 463 /* this is probably cleaner? but also slower! */
464 /* in practise, it seems to be less stable */
250 CV *cp = Perl_cv_clone (cv); 465 CV *cp = Perl_cv_clone (aTHX_ cv);
251 CvPADLIST (cv) = CvPADLIST (cp); 466 CvPADLIST (cv) = CvPADLIST (cp);
252 CvPADLIST (cp) = 0; 467 CvPADLIST (cp) = 0;
253 SvREFCNT_dec (cp); 468 SvREFCNT_dec (cp);
254#else 469#else
255 CvPADLIST (cv) = coro_clone_padlist (cv); 470 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256#endif 471#endif
257 } 472 }
258} 473}
259 474
260static void 475static void
261put_padlist (CV *cv) 476put_padlist (pTHX_ CV *cv)
262{ 477{
263 MAGIC *mg = CORO_MAGIC (cv); 478 MAGIC *mg = CORO_MAGIC_cv (cv);
264 AV *av; 479 AV *av;
265 480
266 if (!mg) 481 if (expect_false (!mg))
267 { 482 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
268 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
269 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
270 mg->mg_virtual = &vtbl_coro;
271 mg->mg_obj = (SV *)newAV ();
272 }
273 483
274 av = (AV *)mg->mg_obj; 484 av = (AV *)mg->mg_obj;
275 485
276 if (AvFILLp (av) >= AvMAX (av)) 486 if (expect_false (AvFILLp (av) >= AvMAX (av)))
277 av_extend (av, AvMAX (av) + 1); 487 av_extend (av, AvMAX (av) + 1);
278 488
279 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 489 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280} 490}
281 491
282#define SB do { 492/** load & save, init *******************************************************/
283#define SE } while (0)
284 493
285#define LOAD(state) load_state((state));
286#define SAVE(state,flags) save_state((state),(flags));
287
288#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
289
290static void 494static void
291load_state(Coro__State c) 495load_perl (pTHX_ Coro__State c)
292{ 496{
497 perl_slots *slot = c->slot;
498 c->slot = 0;
499
500 PL_mainstack = c->mainstack;
501
502 GvSV (PL_defgv) = slot->defsv;
503 GvAV (PL_defgv) = slot->defav;
504 GvSV (PL_errgv) = slot->errsv;
505 GvSV (irsgv) = slot->irsgv;
506
293#define VAR(name,type) PL_ ## name = c->name; 507 #define VAR(name,type) PL_ ## name = slot->name;
294# include "state.h" 508 # include "state.h"
295#undef VAR 509 #undef VAR
296
297 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
298 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
299 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
300 510
301 { 511 {
302 dSP; 512 dSP;
513
303 CV *cv; 514 CV *cv;
304 515
305 /* now do the ugly restore mess */ 516 /* now do the ugly restore mess */
306 while ((cv = (CV *)POPs)) 517 while (expect_true (cv = (CV *)POPs))
307 { 518 {
308 put_padlist (cv); /* mark this padlist as available */ 519 put_padlist (aTHX_ cv); /* mark this padlist as available */
309 CvDEPTH (cv) = PTR2IV (POPs); 520 CvDEPTH (cv) = PTR2IV (POPs);
310 CvPADLIST (cv) = (AV *)POPs; 521 CvPADLIST (cv) = (AV *)POPs;
311 } 522 }
312 523
313 PUTBACK; 524 PUTBACK;
314 } 525 }
315}
316 526
527 slf_frame = c->slf_frame;
528 CORO_THROW = c->except;
529}
530
317static void 531static void
318save_state(Coro__State c, int flags) 532save_perl (pTHX_ Coro__State c)
319{ 533{
534 c->except = CORO_THROW;
535 c->slf_frame = slf_frame;
536
320 { 537 {
321 dSP; 538 dSP;
322 I32 cxix = cxstack_ix; 539 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack; 540 PERL_CONTEXT *ccstk = cxstack;
324 PERL_SI *top_si = PL_curstackinfo; 541 PERL_SI *top_si = PL_curstackinfo;
… …
326 /* 543 /*
327 * the worst thing you can imagine happens first - we have to save 544 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :( 545 * (and reinitialize) all cv's in the whole callchain :(
329 */ 546 */
330 547
331 PUSHs (Nullsv); 548 XPUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */ 549 /* this loop was inspired by pp_caller */
333 for (;;) 550 for (;;)
334 { 551 {
335 while (cxix >= 0) 552 while (expect_true (cxix >= 0))
336 { 553 {
337 PERL_CONTEXT *cx = &ccstk[cxix--]; 554 PERL_CONTEXT *cx = &ccstk[cxix--];
338 555
339 if (CxTYPE(cx) == CXt_SUB) 556 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
340 { 557 {
341 CV *cv = cx->blk_sub.cv; 558 CV *cv = cx->blk_sub.cv;
342 559
343 if (CvDEPTH (cv)) 560 if (expect_true (CvDEPTH (cv)))
344 { 561 {
345 EXTEND (SP, 3); 562 EXTEND (SP, 3);
346
347 PUSHs ((SV *)CvPADLIST(cv)); 563 PUSHs ((SV *)CvPADLIST (cv));
348 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 564 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
349 PUSHs ((SV *)cv); 565 PUSHs ((SV *)cv);
350 566
351 CvDEPTH (cv) = 0; 567 CvDEPTH (cv) = 0;
352 get_padlist (cv); 568 get_padlist (aTHX_ cv);
353 } 569 }
354 } 570 }
355#ifdef CXt_FORMAT
356 else if (CxTYPE(cx) == CXt_FORMAT)
357 {
358 /* I never used formats, so how should I know how these are implemented? */
359 /* my bold guess is as a simple, plain sub... */
360 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361 }
362#endif
363 } 571 }
364 572
365 if (top_si->si_type == PERLSI_MAIN) 573 if (expect_true (top_si->si_type == PERLSI_MAIN))
366 break; 574 break;
367 575
368 top_si = top_si->si_prev; 576 top_si = top_si->si_prev;
369 ccstk = top_si->si_cxstack; 577 ccstk = top_si->si_cxstack;
370 cxix = top_si->si_cxix; 578 cxix = top_si->si_cxix;
371 } 579 }
372 580
373 PUTBACK; 581 PUTBACK;
374 } 582 }
375 583
376 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 584 /* allocate some space on the context stack for our purposes */
377 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 585 /* we manually unroll here, as usually 2 slots is enough */
378 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 586 if (SLOT_COUNT >= 1) CXINC;
587 if (SLOT_COUNT >= 2) CXINC;
588 if (SLOT_COUNT >= 3) CXINC;
589 {
590 int i;
591 for (i = 3; i < SLOT_COUNT; ++i)
592 CXINC;
593 }
594 cxstack_ix -= SLOT_COUNT; /* undo allocation */
379 595
596 c->mainstack = PL_mainstack;
597
598 {
599 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
600
601 slot->defav = GvAV (PL_defgv);
602 slot->defsv = DEFSV;
603 slot->errsv = ERRSV;
604 slot->irsgv = GvSV (irsgv);
605
380#define VAR(name,type)c->name = PL_ ## name; 606 #define VAR(name,type) slot->name = PL_ ## name;
381# include "state.h" 607 # include "state.h"
382#undef VAR 608 #undef VAR
609 }
383} 610}
384 611
385/* 612/*
386 * allocate various perl stacks. This is an exact copy 613 * allocate various perl stacks. This is almost an exact copy
387 * of perl.c:init_stacks, except that it uses less memory 614 * of perl.c:init_stacks, except that it uses less memory
388 * on the (sometimes correct) assumption that coroutines do 615 * on the (sometimes correct) assumption that coroutines do
389 * not usually need a lot of stackspace. 616 * not usually need a lot of stackspace.
390 */ 617 */
618#if CORO_PREFER_PERL_FUNCTIONS
619# define coro_init_stacks(thx) init_stacks ()
620#else
391static void 621static void
392coro_init_stacks () 622coro_init_stacks (pTHX)
393{ 623{
394 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 624 PL_curstackinfo = new_stackinfo(32, 8);
395 PL_curstackinfo->si_type = PERLSI_MAIN; 625 PL_curstackinfo->si_type = PERLSI_MAIN;
396 PL_curstack = PL_curstackinfo->si_stack; 626 PL_curstack = PL_curstackinfo->si_stack;
397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 627 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398 628
399 PL_stack_base = AvARRAY(PL_curstack); 629 PL_stack_base = AvARRAY(PL_curstack);
400 PL_stack_sp = PL_stack_base; 630 PL_stack_sp = PL_stack_base;
401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 631 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402 632
403 New(50,PL_tmps_stack,96,SV*); 633 New(50,PL_tmps_stack,32,SV*);
404 PL_tmps_floor = -1; 634 PL_tmps_floor = -1;
405 PL_tmps_ix = -1; 635 PL_tmps_ix = -1;
406 PL_tmps_max = 96; 636 PL_tmps_max = 32;
407 637
408 New(54,PL_markstack,16,I32); 638 New(54,PL_markstack,16,I32);
409 PL_markstack_ptr = PL_markstack; 639 PL_markstack_ptr = PL_markstack;
410 PL_markstack_max = PL_markstack + 16; 640 PL_markstack_max = PL_markstack + 16;
411 641
412#ifdef SET_MARK_OFFSET 642#ifdef SET_MARK_OFFSET
413 SET_MARK_OFFSET; 643 SET_MARK_OFFSET;
414#endif 644#endif
415 645
416 New(54,PL_scopestack,16,I32); 646 New(54,PL_scopestack,8,I32);
417 PL_scopestack_ix = 0; 647 PL_scopestack_ix = 0;
418 PL_scopestack_max = 16; 648 PL_scopestack_max = 8;
419 649
420 New(54,PL_savestack,96,ANY); 650 New(54,PL_savestack,24,ANY);
421 PL_savestack_ix = 0; 651 PL_savestack_ix = 0;
422 PL_savestack_max = 96; 652 PL_savestack_max = 24;
423 653
424#if !PERL_VERSION_ATLEAST (5,9,0) 654#if !PERL_VERSION_ATLEAST (5,10,0)
425 New(54,PL_retstack,8,OP*); 655 New(54,PL_retstack,4,OP*);
426 PL_retstack_ix = 0; 656 PL_retstack_ix = 0;
427 PL_retstack_max = 8; 657 PL_retstack_max = 4;
428#endif 658#endif
429} 659}
660#endif
430 661
431/* 662/*
432 * destroy the stacks, the callchain etc... 663 * destroy the stacks, the callchain etc...
433 */ 664 */
434static void 665static void
435coro_destroy_stacks () 666coro_destruct_stacks (pTHX)
436{ 667{
437 if (!IN_DESTRUCT)
438 {
439 /* is this ugly, I ask? */
440 LEAVE_SCOPE (0);
441
442 /* sure it is, but more important: is it correct?? :/ */
443 FREETMPS;
444
445 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
446 }
447
448 while (PL_curstackinfo->si_next) 668 while (PL_curstackinfo->si_next)
449 PL_curstackinfo = PL_curstackinfo->si_next; 669 PL_curstackinfo = PL_curstackinfo->si_next;
450 670
451 while (PL_curstackinfo) 671 while (PL_curstackinfo)
452 { 672 {
453 PERL_SI *p = PL_curstackinfo->si_prev; 673 PERL_SI *p = PL_curstackinfo->si_prev;
454 674
455 { /*D*//*remove*/
456 dSP;
457 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458 PUTBACK; /* possibly superfluous */
459 }
460
461 if (!IN_DESTRUCT) 675 if (!IN_DESTRUCT)
462 {
463 dounwind (-1);/*D*//*remove*/
464 SvREFCNT_dec (PL_curstackinfo->si_stack); 676 SvREFCNT_dec (PL_curstackinfo->si_stack);
465 }
466 677
467 Safefree (PL_curstackinfo->si_cxstack); 678 Safefree (PL_curstackinfo->si_cxstack);
468 Safefree (PL_curstackinfo); 679 Safefree (PL_curstackinfo);
469 PL_curstackinfo = p; 680 PL_curstackinfo = p;
470 } 681 }
471 682
472 Safefree (PL_tmps_stack); 683 Safefree (PL_tmps_stack);
473 Safefree (PL_markstack); 684 Safefree (PL_markstack);
474 Safefree (PL_scopestack); 685 Safefree (PL_scopestack);
475 Safefree (PL_savestack); 686 Safefree (PL_savestack);
476#if !PERL_VERSION_ATLEAST (5,9,0) 687#if !PERL_VERSION_ATLEAST (5,10,0)
477 Safefree (PL_retstack); 688 Safefree (PL_retstack);
478#endif 689#endif
479} 690}
480 691
692static size_t
693coro_rss (pTHX_ struct coro *coro)
694{
695 size_t rss = sizeof (*coro);
696
697 if (coro->mainstack)
698 {
699 perl_slots tmp_slot;
700 perl_slots *slot;
701
702 if (coro->flags & CF_RUNNING)
703 {
704 slot = &tmp_slot;
705
706 #define VAR(name,type) slot->name = PL_ ## name;
707 # include "state.h"
708 #undef VAR
709 }
710 else
711 slot = coro->slot;
712
713 if (slot)
714 {
715 rss += sizeof (slot->curstackinfo);
716 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
717 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
718 rss += slot->tmps_max * sizeof (SV *);
719 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
720 rss += slot->scopestack_max * sizeof (I32);
721 rss += slot->savestack_max * sizeof (ANY);
722
723#if !PERL_VERSION_ATLEAST (5,10,0)
724 rss += slot->retstack_max * sizeof (OP *);
725#endif
726 }
727 }
728
729 return rss;
730}
731
732/** coroutine stack handling ************************************************/
733
734static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
736static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
737
738/* apparently < 5.8.8 */
739#ifndef MgPV_nolen_const
740#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
741 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
742 (const char*)(mg)->mg_ptr)
743#endif
744
745/*
746 * This overrides the default magic get method of %SIG elements.
747 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
748 * and instead of tryign to save and restore the hash elements, we just provide
749 * readback here.
750 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
751 * not expecting this to actually change the hook. This is a potential problem
752 * when a schedule happens then, but we ignore this.
753 */
481static void 754static int
482setup_coro (struct coro *coro) 755coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
756{
757 const char *s = MgPV_nolen_const (mg);
758
759 if (*s == '_')
760 {
761 SV **svp = 0;
762
763 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
764 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
765
766 if (svp)
767 {
768 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
769 return 0;
770 }
771 }
772
773 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
774}
775
776static int
777coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
778{
779 const char *s = MgPV_nolen_const (mg);
780
781 if (*s == '_')
782 {
783 SV **svp = 0;
784
785 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
786 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
787
788 if (svp)
789 {
790 SV *old = *svp;
791 *svp = 0;
792 SvREFCNT_dec (old);
793 return 0;
794 }
795 }
796
797 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
798}
799
800static int
801coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
802{
803 const char *s = MgPV_nolen_const (mg);
804
805 if (*s == '_')
806 {
807 SV **svp = 0;
808
809 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
810 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
811
812 if (svp)
813 {
814 SV *old = *svp;
815 *svp = newSVsv (sv);
816 SvREFCNT_dec (old);
817 return 0;
818 }
819 }
820
821 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
822}
823
824static void
825prepare_nop (pTHX_ struct coro_transfer_args *ta)
826{
827 /* kind of mega-hacky, but works */
828 ta->next = ta->prev = (struct coro *)ta;
829}
830
831static int
832slf_check_nop (pTHX_ struct CoroSLF *frame)
833{
834 return 0;
835}
836
837static UNOP coro_setup_op;
838
839static void NOINLINE /* noinline to keep it out of the transfer fast path */
840coro_setup (pTHX_ struct coro *coro)
483{ 841{
484 /* 842 /*
485 * emulate part of the perl startup here. 843 * emulate part of the perl startup here.
486 */ 844 */
487
488 coro_init_stacks (); 845 coro_init_stacks (aTHX);
489 846
847 PL_runops = RUNOPS_DEFAULT;
848 PL_curcop = &PL_compiling;
849 PL_in_eval = EVAL_NULL;
490 PL_curcop = 0; 850 PL_comppad = 0;
491 PL_in_eval = 0;
492 PL_curpm = 0; 851 PL_curpm = 0;
852 PL_curpad = 0;
853 PL_localizing = 0;
854 PL_dirty = 0;
855 PL_restartop = 0;
856#if PERL_VERSION_ATLEAST (5,10,0)
857 PL_parser = 0;
858#endif
859
860 /* recreate the die/warn hooks */
861 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
862 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
863
864 GvSV (PL_defgv) = newSV (0);
865 GvAV (PL_defgv) = coro->args; coro->args = 0;
866 GvSV (PL_errgv) = newSV (0);
867 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
868 PL_rs = newSVsv (GvSV (irsgv));
869 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
493 870
494 { 871 {
495 dSP; 872 dSP;
496 LOGOP myop; 873 UNOP myop;
497 874
498 /* I have no idea why this is needed, but it is */ 875 Zero (&myop, 1, UNOP);
876 myop.op_next = Nullop;
877 myop.op_type = OP_ENTERSUB;
878 myop.op_flags = OPf_WANT_VOID;
879
499 PUSHMARK (SP); 880 PUSHMARK (SP);
500 881 PUSHs ((SV *)coro->startcv);
501 SvREFCNT_dec (GvAV (PL_defgv)); 882 PUTBACK;
502 GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504 Zero (&myop, 1, LOGOP);
505 myop.op_next = Nullop;
506 myop.op_flags = OPf_WANT_VOID;
507
508 PL_op = (OP *)&myop; 883 PL_op = (OP *)&myop;
509
510 PUSHMARK (SP);
511 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512 PUTBACK;
513 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 884 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514 SPAGAIN;
515
516 ENTER; /* necessary e.g. for dounwind */
517 } 885 }
518}
519 886
887 /* this newly created coroutine might be run on an existing cctx which most
888 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
889 */
890 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
891 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
892
893 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
894 coro_setup_op.op_next = PL_op;
895 coro_setup_op.op_type = OP_CUSTOM;
896 coro_setup_op.op_ppaddr = pp_slf;
897 /* no flags etc. required, as an init function won't be called */
898
899 PL_op = (OP *)&coro_setup_op;
900
901 /* copy throw, in case it was set before coro_setup */
902 CORO_THROW = coro->except;
903}
904
520static void 905static void
906coro_destruct (pTHX_ struct coro *coro)
907{
908 if (!IN_DESTRUCT)
909 {
910 /* restore all saved variables and stuff */
911 LEAVE_SCOPE (0);
912 assert (PL_tmps_floor == -1);
913
914 /* free all temporaries */
915 FREETMPS;
916 assert (PL_tmps_ix == -1);
917
918 /* unwind all extra stacks */
919 POPSTACK_TO (PL_mainstack);
920
921 /* unwind main stack */
922 dounwind (-1);
923 }
924
925 SvREFCNT_dec (GvSV (PL_defgv));
926 SvREFCNT_dec (GvAV (PL_defgv));
927 SvREFCNT_dec (GvSV (PL_errgv));
928 SvREFCNT_dec (PL_defoutgv);
929 SvREFCNT_dec (PL_rs);
930 SvREFCNT_dec (GvSV (irsgv));
931
932 SvREFCNT_dec (PL_diehook);
933 SvREFCNT_dec (PL_warnhook);
934
935 SvREFCNT_dec (coro->saved_deffh);
936 SvREFCNT_dec (coro->rouse_cb);
937
938 coro_destruct_stacks (aTHX);
939}
940
941INLINE void
521free_coro_mortal () 942free_coro_mortal (pTHX)
522{ 943{
523 if (coro_mortal) 944 if (expect_true (coro_mortal))
524 { 945 {
525 SvREFCNT_dec (coro_mortal); 946 SvREFCNT_dec (coro_mortal);
526 coro_mortal = 0; 947 coro_mortal = 0;
527 } 948 }
528} 949}
529 950
951static int
952runops_trace (pTHX)
953{
954 COP *oldcop = 0;
955 int oldcxix = -2;
956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
957 coro_cctx *cctx = coro->cctx;
958
959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
960 {
961 PERL_ASYNC_CHECK ();
962
963 if (cctx->flags & CC_TRACE_ALL)
964 {
965 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
966 {
967 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
968 SV **bot, **top;
969 AV *av = newAV (); /* return values */
970 SV **cb;
971 dSP;
972
973 GV *gv = CvGV (cx->blk_sub.cv);
974 SV *fullname = sv_2mortal (newSV (0));
975 if (isGV (gv))
976 gv_efullname3 (fullname, gv, 0);
977
978 bot = PL_stack_base + cx->blk_oldsp + 1;
979 top = cx->blk_gimme == G_ARRAY ? SP + 1
980 : cx->blk_gimme == G_SCALAR ? bot + 1
981 : bot;
982
983 av_extend (av, top - bot);
984 while (bot < top)
985 av_push (av, SvREFCNT_inc_NN (*bot++));
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PUSHMARK (SP);
992 PUSHs (&PL_sv_no);
993 PUSHs (fullname);
994 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003
1004 if (oldcop != PL_curcop)
1005 {
1006 oldcop = PL_curcop;
1007
1008 if (PL_curcop != &PL_compiling)
1009 {
1010 SV **cb;
1011
1012 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1013 {
1014 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1015
1016 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1017 {
1018 runops_proc_t old_runops = PL_runops;
1019 dSP;
1020 GV *gv = CvGV (cx->blk_sub.cv);
1021 SV *fullname = sv_2mortal (newSV (0));
1022
1023 if (isGV (gv))
1024 gv_efullname3 (fullname, gv, 0);
1025
1026 PL_runops = RUNOPS_DEFAULT;
1027 ENTER;
1028 SAVETMPS;
1029 EXTEND (SP, 3);
1030 PUSHMARK (SP);
1031 PUSHs (&PL_sv_yes);
1032 PUSHs (fullname);
1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
1041 }
1042
1043 oldcxix = cxstack_ix;
1044 }
1045
1046 if (cctx->flags & CC_TRACE_LINE)
1047 {
1048 dSP;
1049
1050 PL_runops = RUNOPS_DEFAULT;
1051 ENTER;
1052 SAVETMPS;
1053 EXTEND (SP, 3);
1054 PL_runops = RUNOPS_DEFAULT;
1055 PUSHMARK (SP);
1056 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1057 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1058 PUTBACK;
1059 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1060 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1061 SPAGAIN;
1062 FREETMPS;
1063 LEAVE;
1064 PL_runops = runops_trace;
1065 }
1066 }
1067 }
1068 }
1069 }
1070
1071 TAINT_NOT;
1072 return 0;
1073}
1074
1075static struct coro_cctx *cctx_ssl_cctx;
1076static struct CoroSLF cctx_ssl_frame;
1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
530static void NOINLINE 1094static void NOINLINE
531prepare_cctx (coro_cctx *cctx) 1095cctx_prepare (pTHX_ coro_cctx *cctx)
532{ 1096{
533 dSP;
534 LOGOP myop;
535
536 Zero (&myop, 1, LOGOP);
537 myop.op_next = PL_op;
538 myop.op_flags = OPf_WANT_VOID;
539
540 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541
542 PUSHMARK (SP);
543 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544 PUTBACK;
545 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
546 SPAGAIN;
547}
548
549static void
550coro_run (void *arg)
551{
552 /* coro_run is the alternative epilogue of transfer() */
553 UNLOCK;
554
555 /*
556 * this is a _very_ stripped down perl interpreter ;)
557 */
558 PL_top_env = &PL_start_env; 1097 PL_top_env = &PL_start_env;
559 1098
1099 if (cctx->flags & CC_TRACE)
1100 PL_runops = runops_trace;
1101
1102 /* we already must be executing an SLF op, there is no other valid way
1103 * that can lead to creation of a new cctx */
1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1106
1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1108 cctx_ssl_cctx = cctx;
1109 cctx_ssl_frame = slf_frame;
1110
1111 slf_frame.prepare = slf_prepare_set_stacklevel;
1112 slf_frame.check = slf_check_set_stacklevel;
1113}
1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
1120}
1121
1122/*
1123 * this is a _very_ stripped down perl interpreter ;)
1124 */
1125static void
1126cctx_run (void *arg)
1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
1134 dTHX;
1135
1136 /* normally we would need to skip the entersub here */
1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
1139
560 /* inject call to cctx_init */ 1140 /* inject a fake subroutine call to cctx_init */
561 prepare_cctx ((coro_cctx *)arg); 1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
562 1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
563 /* somebody will hit me for both perl_run and PL_restartop */ 1146 /* somebody or something will hit me for both perl_run and PL_restartop */
1147 PL_restartop = PL_op;
564 perl_run (PL_curinterp); 1148 perl_run (PL_curinterp);
1149 /*
1150 * Unfortunately, there is no way to get at the return values of the
1151 * coro body here, as perl_run destroys these
1152 */
565 1153
566 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1154 /*
567 abort (); 1155 * If perl-run returns we assume exit() was being called or the coro
1156 * fell off the end, which seems to be the only valid (non-bug)
1157 * reason for perl_run to return. We try to exit by jumping to the
1158 * bootstrap-time "top" top_env, as we cannot restore the "main"
1159 * coroutine as Coro has no such concept
1160 */
1161 PL_top_env = main_top_env;
1162 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1163 }
568} 1164}
569 1165
570static coro_cctx * 1166static coro_cctx *
571cctx_new () 1167cctx_new ()
572{ 1168{
573 coro_cctx *cctx; 1169 coro_cctx *cctx;
574 1170
575 ++cctx_count; 1171 ++cctx_count;
576
577 New (0, cctx, 1, coro_cctx); 1172 New (0, cctx, 1, coro_cctx);
578 1173
1174 cctx->gen = cctx_gen;
1175 cctx->flags = 0;
1176 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1177
1178 return cctx;
1179}
1180
1181/* create a new cctx only suitable as source */
1182static coro_cctx *
1183cctx_new_empty ()
1184{
1185 coro_cctx *cctx = cctx_new ();
1186
1187 cctx->sptr = 0;
1188 coro_create (&cctx->cctx, 0, 0, 0, 0);
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx suitable as destination/running a perl interpreter */
1194static coro_cctx *
1195cctx_new_run ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1198 void *stack_start;
1199 size_t stack_size;
1200
579#if HAVE_MMAP 1201#if HAVE_MMAP
580
581 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1202 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582 /* mmap suppsedly does allocate-on-write for us */ 1203 /* mmap supposedly does allocate-on-write for us */
583 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1204 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584 1205
585 if (cctx->sptr == (void *)-1) 1206 if (cctx->sptr != (void *)-1)
1207 {
1208 #if CORO_STACKGUARD
1209 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1210 #endif
1211 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1212 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1213 cctx->flags |= CC_MAPPED;
586 { 1214 }
1215 else
1216#endif
1217 {
1218 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1219 New (0, cctx->sptr, cctx_stacksize, long);
1220
1221 if (!cctx->sptr)
1222 {
587 perror ("FATAL: unable to mmap stack for coroutine"); 1223 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
588 _exit (EXIT_FAILURE); 1224 _exit (EXIT_FAILURE);
589 } 1225 }
590 1226
591# if STACKGUARD 1227 stack_start = cctx->sptr;
592 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1228 stack_size = cctx->ssize;
593# endif
594
595#else
596
597 cctx->ssize = STACKSIZE * (long)sizeof (long);
598 New (0, cctx->sptr, STACKSIZE, long);
599
600 if (!cctx->sptr)
601 { 1229 }
602 perror ("FATAL: unable to malloc stack for coroutine");
603 _exit (EXIT_FAILURE);
604 }
605 1230
1231 #if CORO_USE_VALGRIND
1232 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
606#endif 1233 #endif
607 1234
608#if USE_VALGRIND 1235 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
609 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611 cctx->ssize + (char *)cctx->sptr
612 );
613#endif
614
615 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
616 1236
617 return cctx; 1237 return cctx;
618} 1238}
619 1239
620static void 1240static void
… …
622{ 1242{
623 if (!cctx) 1243 if (!cctx)
624 return; 1244 return;
625 1245
626 --cctx_count; 1246 --cctx_count;
1247 coro_destroy (&cctx->cctx);
627 1248
628#if USE_VALGRIND 1249 /* coro_transfer creates new, empty cctx's */
1250 if (cctx->sptr)
1251 {
1252 #if CORO_USE_VALGRIND
629 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1253 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630#endif 1254 #endif
631 1255
632#if HAVE_MMAP 1256#if HAVE_MMAP
1257 if (cctx->flags & CC_MAPPED)
633 munmap (cctx->sptr, cctx->ssize); 1258 munmap (cctx->sptr, cctx->ssize);
634#else 1259 else
1260#endif
635 Safefree (cctx->sptr); 1261 Safefree (cctx->sptr);
636#endif 1262 }
637 1263
638 Safefree (cctx); 1264 Safefree (cctx);
639} 1265}
640 1266
1267/* wether this cctx should be destructed */
1268#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1269
641static coro_cctx * 1270static coro_cctx *
642cctx_get () 1271cctx_get (pTHX)
643{ 1272{
644 coro_cctx *cctx; 1273 while (expect_true (cctx_first))
645
646 if (cctx_first)
647 { 1274 {
648 cctx = cctx_first; 1275 coro_cctx *cctx = cctx_first;
649 cctx_first = cctx->next; 1276 cctx_first = cctx->next;
650 --cctx_idle; 1277 --cctx_idle;
651 } 1278
652 else 1279 if (expect_true (!CCTX_EXPIRED (cctx)))
653 { 1280 return cctx;
654 cctx = cctx_new (); 1281
655 PL_op = PL_op->op_next; 1282 cctx_destroy (cctx);
656 } 1283 }
657 1284
658 return cctx; 1285 return cctx_new_run ();
659} 1286}
660 1287
661static void 1288static void
662cctx_put (coro_cctx *cctx) 1289cctx_put (coro_cctx *cctx)
663{ 1290{
1291 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1292
664 /* free another cctx if overlimit */ 1293 /* free another cctx if overlimit */
665 if (cctx_idle >= MAX_IDLE_CCTX) 1294 if (expect_false (cctx_idle >= cctx_max_idle))
666 { 1295 {
667 coro_cctx *first = cctx_first; 1296 coro_cctx *first = cctx_first;
668 cctx_first = first->next; 1297 cctx_first = first->next;
669 --cctx_idle; 1298 --cctx_idle;
670 1299
671 assert (!first->inuse);
672 cctx_destroy (first); 1300 cctx_destroy (first);
673 } 1301 }
674 1302
675 ++cctx_idle; 1303 ++cctx_idle;
676 cctx->next = cctx_first; 1304 cctx->next = cctx_first;
677 cctx_first = cctx; 1305 cctx_first = cctx;
678} 1306}
679 1307
680/* never call directly, always through the coro_state_transfer global variable */ 1308/** coroutine switching *****************************************************/
681static void NOINLINE 1309
1310static void
1311transfer_check (pTHX_ struct coro *prev, struct coro *next)
1312{
1313 /* TODO: throwing up here is considered harmful */
1314
1315 if (expect_true (prev != next))
1316 {
1317 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1318 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1319
1320 if (expect_false (next->flags & CF_RUNNING))
1321 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1322
1323 if (expect_false (next->flags & CF_DESTROYED))
1324 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1325
1326#if !PERL_VERSION_ATLEAST (5,10,0)
1327 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1328 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1329#endif
1330 }
1331}
1332
1333/* always use the TRANSFER macro */
1334static void NOINLINE /* noinline so we have a fixed stackframe */
682transfer (struct coro *prev, struct coro *next, int flags) 1335transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
683{ 1336{
684 dSTACKLEVEL; 1337 dSTACKLEVEL;
685 1338
686 /* sometimes transfer is only called to set idle_sp */ 1339 /* sometimes transfer is only called to set idle_sp */
687 if (flags == TRANSFER_SET_STACKLEVEL) 1340 if (expect_false (!next))
1341 {
688 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1342 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1343 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1344 }
689 else if (prev != next) 1345 else if (expect_true (prev != next))
690 { 1346 {
691 coro_cctx *prev__cctx; 1347 coro_cctx *prev__cctx;
692 1348
693 if (!prev->cctx) 1349 if (expect_false (prev->flags & CF_NEW))
694 { 1350 {
695 /* create a new empty context */ 1351 /* create a new empty/source context */
696 Newz (0, prev->cctx, 1, coro_cctx); 1352 prev->cctx = cctx_new_empty ();
697 prev->cctx->inuse = 1; 1353 prev->flags &= ~CF_NEW;
698 prev->flags |= CF_RUNNING; 1354 prev->flags |= CF_RUNNING;
699 } 1355 }
700
701 if (!prev->flags & CF_RUNNING)
702 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704 if (next->flags & CF_RUNNING)
705 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706 1356
707 prev->flags &= ~CF_RUNNING; 1357 prev->flags &= ~CF_RUNNING;
708 next->flags |= CF_RUNNING; 1358 next->flags |= CF_RUNNING;
709 1359
710 LOCK; 1360 /* first get rid of the old state */
1361 save_perl (aTHX_ prev);
711 1362
712 if (next->mainstack) 1363 if (expect_false (next->flags & CF_NEW))
713 { 1364 {
714 /* coroutine already started */ 1365 /* need to start coroutine */
715 SAVE (prev, flags); 1366 next->flags &= ~CF_NEW;
716 LOAD (next); 1367 /* setup coroutine call */
1368 coro_setup (aTHX_ next);
717 } 1369 }
718 else 1370 else
1371 load_perl (aTHX_ next);
1372
1373 prev__cctx = prev->cctx;
1374
1375 /* possibly untie and reuse the cctx */
1376 if (expect_true (
1377 prev__cctx->idle_sp == STACKLEVEL
1378 && !(prev__cctx->flags & CC_TRACE)
1379 && !force_cctx
1380 ))
719 { 1381 {
720 /* need to start coroutine */ 1382 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
721 /* first get rid of the old state */ 1383 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
722 SAVE (prev, -1); 1384
723 /* setup coroutine call */ 1385 prev->cctx = 0;
724 setup_coro (next); 1386
725 /* need a new stack */ 1387 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
726 assert (!next->stack); 1388 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1389 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1390 if (!next->cctx)
1391 next->cctx = cctx_get (aTHX);
1392
1393 cctx_put (prev__cctx);
727 } 1394 }
728 1395
729 prev__cctx = prev->cctx; 1396 ++next->usecount;
730 1397
731 /* possibly "free" the cctx */ 1398 if (expect_true (!next->cctx))
732 if (prev__cctx->idle_sp == STACKLEVEL) 1399 next->cctx = cctx_get (aTHX);
1400
1401 if (expect_false (prev__cctx != next->cctx))
733 { 1402 {
734 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735 assert (PL_top_env == prev__cctx->top_env);
736
737 cctx_put (prev__cctx);
738 prev->cctx = 0;
739 }
740
741 if (!next->cctx)
742 next->cctx = cctx_get ();
743
744 if (prev__cctx != next->cctx)
745 {
746 assert ( prev__cctx->inuse);
747 assert (!next->cctx->inuse);
748
749 prev__cctx->inuse = 0;
750 next->cctx->inuse = 1;
751
752 prev__cctx->top_env = PL_top_env; 1403 prev__cctx->top_env = PL_top_env;
753 PL_top_env = next->cctx->top_env; 1404 PL_top_env = next->cctx->top_env;
754 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755 } 1406 }
756 1407
757 free_coro_mortal (); 1408 transfer_tail (aTHX);
758
759 UNLOCK;
760 } 1409 }
761} 1410}
762 1411
763struct transfer_args 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
764{
765 struct coro *prev, *next;
766 int flags;
767};
768
769#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
770 1414
1415/** high level stuff ********************************************************/
1416
771static void 1417static int
772coro_state_destroy (struct coro *coro) 1418coro_state_destroy (pTHX_ struct coro *coro)
773{ 1419{
774 if (coro->refcnt--) 1420 if (coro->flags & CF_DESTROYED)
775 return; 1421 return 0;
776 1422
1423 if (coro->on_destroy)
1424 coro->on_destroy (aTHX_ coro);
1425
1426 coro->flags |= CF_DESTROYED;
1427
777 if (coro->flags & CF_RUNNING) 1428 if (coro->flags & CF_READY)
778 croak ("FATAL: tried to destroy currently running coroutine"); 1429 {
1430 /* reduce nready, as destroying a ready coro effectively unreadies it */
1431 /* alternative: look through all ready queues and remove the coro */
1432 --coro_nready;
1433 }
1434 else
1435 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779 1436
780 if (coro->mainstack && coro->mainstack != main_mainstack) 1437 if (coro->mainstack && coro->mainstack != main_mainstack)
781 { 1438 {
782 struct coro temp; 1439 struct coro temp;
783 1440
784 SAVE ((&temp), TRANSFER_SAVE_ALL); 1441 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
785 LOAD (coro);
786 1442
787 coro_destroy_stacks (); 1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
788 1445
789 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1446 coro_destruct (aTHX_ coro);
790 1447
1448 load_perl (aTHX_ &temp);
1449
791 coro->mainstack = 0; 1450 coro->slot = 0;
792 } 1451 }
793 1452
794 cctx_destroy (coro->cctx); 1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->startcv);
795 SvREFCNT_dec (coro->args); 1455 SvREFCNT_dec (coro->args);
796 Safefree (coro); 1456 SvREFCNT_dec (CORO_THROW);
1457
1458 if (coro->next) coro->next->prev = coro->prev;
1459 if (coro->prev) coro->prev->next = coro->next;
1460 if (coro == coro_first) coro_first = coro->next;
1461
1462 return 1;
797} 1463}
798 1464
799static int 1465static int
800coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1466coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801{ 1467{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1468 struct coro *coro = (struct coro *)mg->mg_ptr;
803 mg->mg_ptr = 0; 1469 mg->mg_ptr = 0;
804 1470
1471 coro->hv = 0;
1472
1473 if (--coro->refcnt < 0)
1474 {
805 coro_state_destroy (coro); 1475 coro_state_destroy (aTHX_ coro);
1476 Safefree (coro);
1477 }
806 1478
807 return 0; 1479 return 0;
808} 1480}
809 1481
810static int 1482static int
… …
817 return 0; 1489 return 0;
818} 1490}
819 1491
820static MGVTBL coro_state_vtbl = { 1492static MGVTBL coro_state_vtbl = {
821 0, 0, 0, 0, 1493 0, 0, 0, 0,
822 coro_state_clear, 1494 coro_state_free,
823 0, 1495 0,
824#ifdef MGf_DUP 1496#ifdef MGf_DUP
825 coro_state_dup, 1497 coro_state_dup,
826#else 1498#else
827# define MGf_DUP 0 1499# define MGf_DUP 0
828#endif 1500#endif
829}; 1501};
830 1502
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1503static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1504prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1505{
856 ta->prev = SvSTATE (prev); 1506 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1507 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1508 TRANSFER_CHECK (*ta);
859} 1509}
860 1510
861static void 1511static void
862api_transfer (SV *prev, SV *next, int flags) 1512api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
863{ 1513{
864 dTHX;
865 struct transfer_args ta; 1514 struct coro_transfer_args ta;
866 1515
867 prepare_transfer (&ta, prev, next, flags); 1516 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1517 TRANSFER (ta, 1);
1518}
1519
1520/*****************************************************************************/
1521/* gensub: simple closure generation utility */
1522
1523#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1524
1525/* create a closure from XS, returns a code reference */
1526/* the arg can be accessed via GENSUB_ARG from the callback */
1527/* the callback must use dXSARGS/XSRETURN */
1528static SV *
1529gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1530{
1531 CV *cv = (CV *)newSV (0);
1532
1533 sv_upgrade ((SV *)cv, SVt_PVCV);
1534
1535 CvANON_on (cv);
1536 CvISXSUB_on (cv);
1537 CvXSUB (cv) = xsub;
1538 GENSUB_ARG = arg;
1539
1540 return newRV_noinc ((SV *)cv);
869} 1541}
870 1542
871/** Coro ********************************************************************/ 1543/** Coro ********************************************************************/
872 1544
873#define PRIO_MAX 3 1545INLINE void
874#define PRIO_HIGH 1 1546coro_enq (pTHX_ struct coro *coro)
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void
886coro_enq (SV *coro_sv)
887{ 1547{
888 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1548 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
889 coro_nready++;
890} 1549}
891 1550
892static SV * 1551INLINE SV *
893coro_deq (int min_prio) 1552coro_deq (pTHX)
894{ 1553{
895 int prio = PRIO_MAX - PRIO_MIN; 1554 int prio;
896 1555
897 min_prio -= PRIO_MIN;
898 if (min_prio < 0)
899 min_prio = 0;
900
901 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1556 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
902 if (AvFILLp (coro_ready [prio]) >= 0) 1557 if (AvFILLp (coro_ready [prio]) >= 0)
903 {
904 coro_nready--;
905 return av_shift (coro_ready [prio]); 1558 return av_shift (coro_ready [prio]);
906 }
907 1559
908 return 0; 1560 return 0;
909} 1561}
910 1562
911static int 1563static int
912api_ready (SV *coro_sv) 1564api_ready (pTHX_ SV *coro_sv)
913{ 1565{
914 struct coro *coro; 1566 struct coro *coro;
1567 SV *sv_hook;
1568 void (*xs_hook)(void);
915 1569
916 if (SvROK (coro_sv)) 1570 if (SvROK (coro_sv))
917 coro_sv = SvRV (coro_sv); 1571 coro_sv = SvRV (coro_sv);
918 1572
919 coro = SvSTATE (coro_sv); 1573 coro = SvSTATE (coro_sv);
920 1574
921 if (coro->flags & CF_READY) 1575 if (coro->flags & CF_READY)
922 return 0; 1576 return 0;
923 1577
924 if (coro->flags & CF_RUNNING)
925 croak ("Coro::ready called on currently running coroutine");
926
927 coro->flags |= CF_READY; 1578 coro->flags |= CF_READY;
928 1579
929 LOCK; 1580 sv_hook = coro_nready ? 0 : coro_readyhook;
930 coro_enq (SvREFCNT_inc (coro_sv)); 1581 xs_hook = coro_nready ? 0 : coroapi.readyhook;
931 UNLOCK; 1582
1583 coro_enq (aTHX_ coro);
1584 ++coro_nready;
1585
1586 if (sv_hook)
1587 {
1588 dSP;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (sv_hook, G_VOID | G_DISCARD);
1596
1597 FREETMPS;
1598 LEAVE;
1599 }
1600
1601 if (xs_hook)
1602 xs_hook ();
932 1603
933 return 1; 1604 return 1;
934} 1605}
935 1606
936static int 1607static int
937api_is_ready (SV *coro_sv) 1608api_is_ready (pTHX_ SV *coro_sv)
938{ 1609{
939 return !!SvSTATE (coro_sv)->flags & CF_READY; 1610 return !!(SvSTATE (coro_sv)->flags & CF_READY);
940} 1611}
941 1612
942static void 1613INLINE void
943prepare_schedule (struct transfer_args *ta) 1614prepare_schedule (pTHX_ struct coro_transfer_args *ta)
944{ 1615{
945 SV *current, *prev, *next; 1616 SV *prev_sv, *next_sv;
946
947 current = GvSV (coro_current);
948 1617
949 for (;;) 1618 for (;;)
950 { 1619 {
951 LOCK;
952 next = coro_deq (PRIO_MIN); 1620 next_sv = coro_deq (aTHX);
953 UNLOCK;
954 1621
955 if (next) 1622 /* nothing to schedule: call the idle handler */
956 break; 1623 if (expect_false (!next_sv))
957
958 { 1624 {
959 dSP; 1625 dSP;
960 1626
961 ENTER; 1627 ENTER;
962 SAVETMPS; 1628 SAVETMPS;
963 1629
964 PUSHMARK (SP); 1630 PUSHMARK (SP);
965 PUTBACK; 1631 PUTBACK;
966 call_sv (GvSV (coro_idle), G_DISCARD); 1632 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
967 1633
968 FREETMPS; 1634 FREETMPS;
969 LEAVE; 1635 LEAVE;
1636 continue;
970 } 1637 }
971 }
972 1638
973 prev = SvRV (current); 1639 ta->next = SvSTATE_hv (next_sv);
974 SvRV (current) = next; 1640
1641 /* cannot transfer to destroyed coros, skip and look for next */
1642 if (expect_false (ta->next->flags & CF_DESTROYED))
1643 {
1644 SvREFCNT_dec (next_sv);
1645 /* coro_nready has already been taken care of by destroy */
1646 continue;
1647 }
1648
1649 --coro_nready;
1650 break;
1651 }
975 1652
976 /* free this only after the transfer */ 1653 /* free this only after the transfer */
977 LOCK; 1654 prev_sv = SvRV (coro_current);
978 free_coro_mortal ();
979 UNLOCK;
980 coro_mortal = prev;
981
982 ta->prev = SvSTATE (prev); 1655 ta->prev = SvSTATE_hv (prev_sv);
983 ta->next = SvSTATE (next); 1656 TRANSFER_CHECK (*ta);
984 ta->flags = TRANSFER_SAVE_ALL; 1657 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
985
986 ta->next->flags &= ~CF_READY; 1658 ta->next->flags &= ~CF_READY;
987} 1659 SvRV_set (coro_current, next_sv);
988 1660
989static void 1661 free_coro_mortal (aTHX);
1662 coro_mortal = prev_sv;
1663}
1664
1665INLINE void
990prepare_cede (struct transfer_args *ta) 1666prepare_cede (pTHX_ struct coro_transfer_args *ta)
991{ 1667{
992 api_ready (GvSV (coro_current)); 1668 api_ready (aTHX_ coro_current);
993
994 prepare_schedule (ta); 1669 prepare_schedule (aTHX_ ta);
995} 1670}
996 1671
1672INLINE void
1673prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1674{
1675 SV *prev = SvRV (coro_current);
1676
1677 if (coro_nready)
1678 {
1679 prepare_schedule (aTHX_ ta);
1680 api_ready (aTHX_ prev);
1681 }
1682 else
1683 prepare_nop (aTHX_ ta);
1684}
1685
997static void 1686static void
998api_schedule (void) 1687api_schedule (pTHX)
999{ 1688{
1000 dTHX;
1001 struct transfer_args ta; 1689 struct coro_transfer_args ta;
1002 1690
1003 prepare_schedule (&ta); 1691 prepare_schedule (aTHX_ &ta);
1004 TRANSFER (ta); 1692 TRANSFER (ta, 1);
1005} 1693}
1006 1694
1007static void 1695static int
1008api_cede (void) 1696api_cede (pTHX)
1009{ 1697{
1010 dTHX;
1011 struct transfer_args ta; 1698 struct coro_transfer_args ta;
1012 1699
1013 prepare_cede (&ta); 1700 prepare_cede (aTHX_ &ta);
1701
1702 if (expect_true (ta.prev != ta.next))
1703 {
1014 TRANSFER (ta); 1704 TRANSFER (ta, 1);
1705 return 1;
1706 }
1707 else
1708 return 0;
1015} 1709}
1016 1710
1711static int
1712api_cede_notself (pTHX)
1713{
1714 if (coro_nready)
1715 {
1716 struct coro_transfer_args ta;
1717
1718 prepare_cede_notself (aTHX_ &ta);
1719 TRANSFER (ta, 1);
1720 return 1;
1721 }
1722 else
1723 return 0;
1724}
1725
1726static void
1727api_trace (pTHX_ SV *coro_sv, int flags)
1728{
1729 struct coro *coro = SvSTATE (coro_sv);
1730
1731 if (flags & CC_TRACE)
1732 {
1733 if (!coro->cctx)
1734 coro->cctx = cctx_new_run ();
1735 else if (!(coro->cctx->flags & CC_TRACE))
1736 croak ("cannot enable tracing on coroutine with custom stack,");
1737
1738 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1739 }
1740 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1741 {
1742 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1743
1744 if (coro->flags & CF_RUNNING)
1745 PL_runops = RUNOPS_DEFAULT;
1746 else
1747 coro->slot->runops = RUNOPS_DEFAULT;
1748 }
1749}
1750
1751/*****************************************************************************/
1752/* rouse callback */
1753
1754#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1755
1756static void
1757coro_rouse_callback (pTHX_ CV *cv)
1758{
1759 dXSARGS;
1760 SV *data = (SV *)GENSUB_ARG;
1761
1762 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1763 {
1764 /* first call, set args */
1765 int i;
1766 AV *av = newAV ();
1767 SV *coro = SvRV (data);
1768
1769 SvRV_set (data, (SV *)av);
1770 api_ready (aTHX_ coro);
1771 SvREFCNT_dec (coro);
1772
1773 /* better take a full copy of the arguments */
1774 while (items--)
1775 av_store (av, items, newSVsv (ST (items)));
1776 }
1777
1778 XSRETURN_EMPTY;
1779}
1780
1781static int
1782slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1783{
1784 SV *data = (SV *)frame->data;
1785
1786 if (CORO_THROW)
1787 return 0;
1788
1789 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1790 return 1;
1791
1792 /* now push all results on the stack */
1793 {
1794 dSP;
1795 AV *av = (AV *)SvRV (data);
1796 int i;
1797
1798 EXTEND (SP, AvFILLp (av) + 1);
1799 for (i = 0; i <= AvFILLp (av); ++i)
1800 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1801
1802 /* we have stolen the elements, so ste length to zero and free */
1803 AvFILLp (av) = -1;
1804 av_undef (av);
1805
1806 PUTBACK;
1807 }
1808
1809 return 0;
1810}
1811
1812static void
1813slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 SV *cb;
1816
1817 if (items)
1818 cb = arg [0];
1819 else
1820 {
1821 struct coro *coro = SvSTATE_current;
1822
1823 if (!coro->rouse_cb)
1824 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1825
1826 cb = sv_2mortal (coro->rouse_cb);
1827 coro->rouse_cb = 0;
1828 }
1829
1830 if (!SvROK (cb)
1831 || SvTYPE (SvRV (cb)) != SVt_PVCV
1832 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1833 croak ("Coro::rouse_wait called with illegal callback argument,");
1834
1835 {
1836 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1837 SV *data = (SV *)GENSUB_ARG;
1838
1839 frame->data = (void *)data;
1840 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1841 frame->check = slf_check_rouse_wait;
1842 }
1843}
1844
1845static SV *
1846coro_new_rouse_cb (pTHX)
1847{
1848 HV *hv = (HV *)SvRV (coro_current);
1849 struct coro *coro = SvSTATE_hv (hv);
1850 SV *data = newRV_inc ((SV *)hv);
1851 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1852
1853 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1854 SvREFCNT_dec (data); /* magicext increases the refcount */
1855
1856 SvREFCNT_dec (coro->rouse_cb);
1857 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1858
1859 return cb;
1860}
1861
1862/*****************************************************************************/
1863/* schedule-like-function opcode (SLF) */
1864
1865static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1866static const CV *slf_cv;
1867static SV **slf_argv;
1868static int slf_argc, slf_arga; /* count, allocated */
1869static I32 slf_ax; /* top of stack, for restore */
1870
1871/* this restores the stack in the case we patched the entersub, to */
1872/* recreate the stack frame as perl will on following calls */
1873/* since entersub cleared the stack */
1874static OP *
1875pp_restore (pTHX)
1876{
1877 int i;
1878 SV **SP = PL_stack_base + slf_ax;
1879
1880 PUSHMARK (SP);
1881
1882 EXTEND (SP, slf_argc + 1);
1883
1884 for (i = 0; i < slf_argc; ++i)
1885 PUSHs (sv_2mortal (slf_argv [i]));
1886
1887 PUSHs ((SV *)CvGV (slf_cv));
1888
1889 RETURNOP (slf_restore.op_first);
1890}
1891
1892static void
1893slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1894{
1895 SV **arg = (SV **)slf_frame.data;
1896
1897 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1898}
1899
1900static void
1901slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1902{
1903 if (items != 2)
1904 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1905
1906 frame->prepare = slf_prepare_transfer;
1907 frame->check = slf_check_nop;
1908 frame->data = (void *)arg; /* let's hope it will stay valid */
1909}
1910
1911static void
1912slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1913{
1914 frame->prepare = prepare_schedule;
1915 frame->check = slf_check_nop;
1916}
1917
1918static void
1919slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1920{
1921 frame->prepare = prepare_cede;
1922 frame->check = slf_check_nop;
1923}
1924
1925static void
1926slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1927{
1928 frame->prepare = prepare_cede_notself;
1929 frame->check = slf_check_nop;
1930}
1931
1932/*
1933 * these not obviously related functions are all rolled into one
1934 * function to increase chances that they all will call transfer with the same
1935 * stack offset
1936 * SLF stands for "schedule-like-function".
1937 */
1938static OP *
1939pp_slf (pTHX)
1940{
1941 I32 checkmark; /* mark SP to see how many elements check has pushed */
1942
1943 /* set up the slf frame, unless it has already been set-up */
1944 /* the latter happens when a new coro has been started */
1945 /* or when a new cctx was attached to an existing coroutine */
1946 if (expect_true (!slf_frame.prepare))
1947 {
1948 /* first iteration */
1949 dSP;
1950 SV **arg = PL_stack_base + TOPMARK + 1;
1951 int items = SP - arg; /* args without function object */
1952 SV *gv = *sp;
1953
1954 /* do a quick consistency check on the "function" object, and if it isn't */
1955 /* for us, divert to the real entersub */
1956 if (SvTYPE (gv) != SVt_PVGV
1957 || !GvCV (gv)
1958 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1959 return PL_ppaddr[OP_ENTERSUB](aTHX);
1960
1961 if (!(PL_op->op_flags & OPf_STACKED))
1962 {
1963 /* ampersand-form of call, use @_ instead of stack */
1964 AV *av = GvAV (PL_defgv);
1965 arg = AvARRAY (av);
1966 items = AvFILLp (av) + 1;
1967 }
1968
1969 /* now call the init function, which needs to set up slf_frame */
1970 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1971 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1972
1973 /* pop args */
1974 SP = PL_stack_base + POPMARK;
1975
1976 PUTBACK;
1977 }
1978
1979 /* now that we have a slf_frame, interpret it! */
1980 /* we use a callback system not to make the code needlessly */
1981 /* complicated, but so we can run multiple perl coros from one cctx */
1982
1983 do
1984 {
1985 struct coro_transfer_args ta;
1986
1987 slf_frame.prepare (aTHX_ &ta);
1988 TRANSFER (ta, 0);
1989
1990 checkmark = PL_stack_sp - PL_stack_base;
1991 }
1992 while (slf_frame.check (aTHX_ &slf_frame));
1993
1994 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1995
1996 /* exception handling */
1997 if (expect_false (CORO_THROW))
1998 {
1999 SV *exception = sv_2mortal (CORO_THROW);
2000
2001 CORO_THROW = 0;
2002 sv_setsv (ERRSV, exception);
2003 croak (0);
2004 }
2005
2006 /* return value handling - mostly like entersub */
2007 /* make sure we put something on the stack in scalar context */
2008 if (GIMME_V == G_SCALAR)
2009 {
2010 dSP;
2011 SV **bot = PL_stack_base + checkmark;
2012
2013 if (sp == bot) /* too few, push undef */
2014 bot [1] = &PL_sv_undef;
2015 else if (sp != bot + 1) /* too many, take last one */
2016 bot [1] = *sp;
2017
2018 SP = bot + 1;
2019
2020 PUTBACK;
2021 }
2022
2023 return NORMAL;
2024}
2025
2026static void
2027api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2028{
2029 int i;
2030 SV **arg = PL_stack_base + ax;
2031 int items = PL_stack_sp - arg + 1;
2032
2033 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2034
2035 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2036 && PL_op->op_ppaddr != pp_slf)
2037 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2038
2039 CvFLAGS (cv) |= CVf_SLF;
2040 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2041 slf_cv = cv;
2042
2043 /* we patch the op, and then re-run the whole call */
2044 /* we have to put the same argument on the stack for this to work */
2045 /* and this will be done by pp_restore */
2046 slf_restore.op_next = (OP *)&slf_restore;
2047 slf_restore.op_type = OP_CUSTOM;
2048 slf_restore.op_ppaddr = pp_restore;
2049 slf_restore.op_first = PL_op;
2050
2051 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2052
2053 if (PL_op->op_flags & OPf_STACKED)
2054 {
2055 if (items > slf_arga)
2056 {
2057 slf_arga = items;
2058 free (slf_argv);
2059 slf_argv = malloc (slf_arga * sizeof (SV *));
2060 }
2061
2062 slf_argc = items;
2063
2064 for (i = 0; i < items; ++i)
2065 slf_argv [i] = SvREFCNT_inc (arg [i]);
2066 }
2067 else
2068 slf_argc = 0;
2069
2070 PL_op->op_ppaddr = pp_slf;
2071 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2072
2073 PL_op = (OP *)&slf_restore;
2074}
2075
2076/*****************************************************************************/
2077/* PerlIO::cede */
2078
2079typedef struct
2080{
2081 PerlIOBuf base;
2082 NV next, every;
2083} PerlIOCede;
2084
2085static IV
2086PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2087{
2088 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2089
2090 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2091 self->next = nvtime () + self->every;
2092
2093 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2094}
2095
2096static SV *
2097PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2098{
2099 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2100
2101 return newSVnv (self->every);
2102}
2103
2104static IV
2105PerlIOCede_flush (pTHX_ PerlIO *f)
2106{
2107 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2108 double now = nvtime ();
2109
2110 if (now >= self->next)
2111 {
2112 api_cede (aTHX);
2113 self->next = now + self->every;
2114 }
2115
2116 return PerlIOBuf_flush (aTHX_ f);
2117}
2118
2119static PerlIO_funcs PerlIO_cede =
2120{
2121 sizeof(PerlIO_funcs),
2122 "cede",
2123 sizeof(PerlIOCede),
2124 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2125 PerlIOCede_pushed,
2126 PerlIOBuf_popped,
2127 PerlIOBuf_open,
2128 PerlIOBase_binmode,
2129 PerlIOCede_getarg,
2130 PerlIOBase_fileno,
2131 PerlIOBuf_dup,
2132 PerlIOBuf_read,
2133 PerlIOBuf_unread,
2134 PerlIOBuf_write,
2135 PerlIOBuf_seek,
2136 PerlIOBuf_tell,
2137 PerlIOBuf_close,
2138 PerlIOCede_flush,
2139 PerlIOBuf_fill,
2140 PerlIOBase_eof,
2141 PerlIOBase_error,
2142 PerlIOBase_clearerr,
2143 PerlIOBase_setlinebuf,
2144 PerlIOBuf_get_base,
2145 PerlIOBuf_bufsiz,
2146 PerlIOBuf_get_ptr,
2147 PerlIOBuf_get_cnt,
2148 PerlIOBuf_set_ptrcnt,
2149};
2150
2151/*****************************************************************************/
2152/* Coro::Semaphore & Coro::Signal */
2153
2154static SV *
2155coro_waitarray_new (pTHX_ int count)
2156{
2157 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2158 AV *av = newAV ();
2159 SV **ary;
2160
2161 /* unfortunately, building manually saves memory */
2162 Newx (ary, 2, SV *);
2163 AvALLOC (av) = ary;
2164 /*AvARRAY (av) = ary;*/
2165 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2166 AvMAX (av) = 1;
2167 AvFILLp (av) = 0;
2168 ary [0] = newSViv (count);
2169
2170 return newRV_noinc ((SV *)av);
2171}
2172
2173/* semaphore */
2174
2175static void
2176coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2177{
2178 SV *count_sv = AvARRAY (av)[0];
2179 IV count = SvIVX (count_sv);
2180
2181 count += adjust;
2182 SvIVX (count_sv) = count;
2183
2184 /* now wake up as many waiters as are expected to lock */
2185 while (count > 0 && AvFILLp (av) > 0)
2186 {
2187 SV *cb;
2188
2189 /* swap first two elements so we can shift a waiter */
2190 AvARRAY (av)[0] = AvARRAY (av)[1];
2191 AvARRAY (av)[1] = count_sv;
2192 cb = av_shift (av);
2193
2194 if (SvOBJECT (cb))
2195 {
2196 api_ready (aTHX_ cb);
2197 --count;
2198 }
2199 else if (SvTYPE (cb) == SVt_PVCV)
2200 {
2201 dSP;
2202 PUSHMARK (SP);
2203 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2204 PUTBACK;
2205 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2206 }
2207
2208 SvREFCNT_dec (cb);
2209 }
2210}
2211
2212static void
2213coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2214{
2215 /* call $sem->adjust (0) to possibly wake up some other waiters */
2216 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2217}
2218
2219static int
2220slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2221{
2222 AV *av = (AV *)frame->data;
2223 SV *count_sv = AvARRAY (av)[0];
2224
2225 /* if we are about to throw, don't actually acquire the lock, just throw */
2226 if (CORO_THROW)
2227 return 0;
2228 else if (SvIVX (count_sv) > 0)
2229 {
2230 SvSTATE_current->on_destroy = 0;
2231
2232 if (acquire)
2233 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2234 else
2235 coro_semaphore_adjust (aTHX_ av, 0);
2236
2237 return 0;
2238 }
2239 else
2240 {
2241 int i;
2242 /* if we were woken up but can't down, we look through the whole */
2243 /* waiters list and only add us if we aren't in there already */
2244 /* this avoids some degenerate memory usage cases */
2245
2246 for (i = 1; i <= AvFILLp (av); ++i)
2247 if (AvARRAY (av)[i] == SvRV (coro_current))
2248 return 1;
2249
2250 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2251 return 1;
2252 }
2253}
2254
2255static int
2256slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2257{
2258 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2259}
2260
2261static int
2262slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2263{
2264 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2265}
2266
2267static void
2268slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 AV *av = (AV *)SvRV (arg [0]);
2271
2272 if (SvIVX (AvARRAY (av)[0]) > 0)
2273 {
2274 frame->data = (void *)av;
2275 frame->prepare = prepare_nop;
2276 }
2277 else
2278 {
2279 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2280
2281 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2282 frame->prepare = prepare_schedule;
2283
2284 /* to avoid race conditions when a woken-up coro gets terminated */
2285 /* we arrange for a temporary on_destroy that calls adjust (0) */
2286 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2287 }
2288}
2289
2290static void
2291slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2292{
2293 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2294 frame->check = slf_check_semaphore_down;
2295}
2296
2297static void
2298slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2299{
2300 if (items >= 2)
2301 {
2302 /* callback form */
2303 AV *av = (AV *)SvRV (arg [0]);
2304 CV *cb_cv = coro_sv_2cv (arg [1]);
2305
2306 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2307
2308 if (SvIVX (AvARRAY (av)[0]) > 0)
2309 coro_semaphore_adjust (aTHX_ av, 0);
2310
2311 frame->prepare = prepare_nop;
2312 frame->check = slf_check_nop;
2313 }
2314 else
2315 {
2316 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2317 frame->check = slf_check_semaphore_wait;
2318 }
2319}
2320
2321/* signal */
2322
2323static void
2324coro_signal_wake (pTHX_ AV *av, int count)
2325{
2326 SvIVX (AvARRAY (av)[0]) = 0;
2327
2328 /* now signal count waiters */
2329 while (count > 0 && AvFILLp (av) > 0)
2330 {
2331 SV *cb;
2332
2333 /* swap first two elements so we can shift a waiter */
2334 cb = AvARRAY (av)[0];
2335 AvARRAY (av)[0] = AvARRAY (av)[1];
2336 AvARRAY (av)[1] = cb;
2337
2338 cb = av_shift (av);
2339
2340 api_ready (aTHX_ cb);
2341 sv_setiv (cb, 0); /* signal waiter */
2342 SvREFCNT_dec (cb);
2343
2344 --count;
2345 }
2346}
2347
2348static int
2349slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2350{
2351 /* if we are about to throw, also stop waiting */
2352 return SvROK ((SV *)frame->data) && !CORO_THROW;
2353}
2354
2355static void
2356slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2357{
2358 AV *av = (AV *)SvRV (arg [0]);
2359
2360 if (SvIVX (AvARRAY (av)[0]))
2361 {
2362 SvIVX (AvARRAY (av)[0]) = 0;
2363 frame->prepare = prepare_nop;
2364 frame->check = slf_check_nop;
2365 }
2366 else
2367 {
2368 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2369
2370 av_push (av, waiter);
2371
2372 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2373 frame->prepare = prepare_schedule;
2374 frame->check = slf_check_signal_wait;
2375 }
2376}
2377
2378/*****************************************************************************/
2379/* Coro::AIO */
2380
2381#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2382
2383/* helper storage struct */
2384struct io_state
2385{
2386 int errorno;
2387 I32 laststype; /* U16 in 5.10.0 */
2388 int laststatval;
2389 Stat_t statcache;
2390};
2391
2392static void
2393coro_aio_callback (pTHX_ CV *cv)
2394{
2395 dXSARGS;
2396 AV *state = (AV *)GENSUB_ARG;
2397 SV *coro = av_pop (state);
2398 SV *data_sv = newSV (sizeof (struct io_state));
2399
2400 av_extend (state, items);
2401
2402 sv_upgrade (data_sv, SVt_PV);
2403 SvCUR_set (data_sv, sizeof (struct io_state));
2404 SvPOK_only (data_sv);
2405
2406 {
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 data->errorno = errno;
2410 data->laststype = PL_laststype;
2411 data->laststatval = PL_laststatval;
2412 data->statcache = PL_statcache;
2413 }
2414
2415 /* now build the result vector out of all the parameters and the data_sv */
2416 {
2417 int i;
2418
2419 for (i = 0; i < items; ++i)
2420 av_push (state, SvREFCNT_inc_NN (ST (i)));
2421 }
2422
2423 av_push (state, data_sv);
2424
2425 api_ready (aTHX_ coro);
2426 SvREFCNT_dec (coro);
2427 SvREFCNT_dec ((AV *)state);
2428}
2429
2430static int
2431slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2432{
2433 AV *state = (AV *)frame->data;
2434
2435 /* if we are about to throw, return early */
2436 /* this does not cancel the aio request, but at least */
2437 /* it quickly returns */
2438 if (CORO_THROW)
2439 return 0;
2440
2441 /* one element that is an RV? repeat! */
2442 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2443 return 1;
2444
2445 /* restore status */
2446 {
2447 SV *data_sv = av_pop (state);
2448 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2449
2450 errno = data->errorno;
2451 PL_laststype = data->laststype;
2452 PL_laststatval = data->laststatval;
2453 PL_statcache = data->statcache;
2454
2455 SvREFCNT_dec (data_sv);
2456 }
2457
2458 /* push result values */
2459 {
2460 dSP;
2461 int i;
2462
2463 EXTEND (SP, AvFILLp (state) + 1);
2464 for (i = 0; i <= AvFILLp (state); ++i)
2465 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2466
2467 PUTBACK;
2468 }
2469
2470 return 0;
2471}
2472
2473static void
2474slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2475{
2476 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2477 SV *coro_hv = SvRV (coro_current);
2478 struct coro *coro = SvSTATE_hv (coro_hv);
2479
2480 /* put our coroutine id on the state arg */
2481 av_push (state, SvREFCNT_inc_NN (coro_hv));
2482
2483 /* first see whether we have a non-zero priority and set it as AIO prio */
2484 if (coro->prio)
2485 {
2486 dSP;
2487
2488 static SV *prio_cv;
2489 static SV *prio_sv;
2490
2491 if (expect_false (!prio_cv))
2492 {
2493 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2494 prio_sv = newSViv (0);
2495 }
2496
2497 PUSHMARK (SP);
2498 sv_setiv (prio_sv, coro->prio);
2499 XPUSHs (prio_sv);
2500
2501 PUTBACK;
2502 call_sv (prio_cv, G_VOID | G_DISCARD);
2503 }
2504
2505 /* now call the original request */
2506 {
2507 dSP;
2508 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2509 int i;
2510
2511 PUSHMARK (SP);
2512
2513 /* first push all args to the stack */
2514 EXTEND (SP, items + 1);
2515
2516 for (i = 0; i < items; ++i)
2517 PUSHs (arg [i]);
2518
2519 /* now push the callback closure */
2520 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2521
2522 /* now call the AIO function - we assume our request is uncancelable */
2523 PUTBACK;
2524 call_sv ((SV *)req, G_VOID | G_DISCARD);
2525 }
2526
2527 /* now that the requets is going, we loop toll we have a result */
2528 frame->data = (void *)state;
2529 frame->prepare = prepare_schedule;
2530 frame->check = slf_check_aio_req;
2531}
2532
2533static void
2534coro_aio_req_xs (pTHX_ CV *cv)
2535{
2536 dXSARGS;
2537
2538 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2539
2540 XSRETURN_EMPTY;
2541}
2542
2543/*****************************************************************************/
2544
1017MODULE = Coro::State PACKAGE = Coro::State 2545MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018 2546
1019PROTOTYPES: DISABLE 2547PROTOTYPES: DISABLE
1020 2548
1021BOOT: 2549BOOT:
1022{ 2550{
1023#ifdef USE_ITHREADS 2551#ifdef USE_ITHREADS
1024 MUTEX_INIT (&coro_mutex); 2552# if CORO_PTHREAD
2553 coro_thx = PERL_GET_CONTEXT;
2554# endif
1025#endif 2555#endif
1026 BOOT_PAGESIZE; 2556 BOOT_PAGESIZE;
1027 2557
2558 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2559 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2560
2561 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2562 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2563 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2564
2565 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2566 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2567 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2568
1028 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2569 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029 2570
1030 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2571 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2572 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2573 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2574 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033 2575
1034 main_mainstack = PL_mainstack; 2576 main_mainstack = PL_mainstack;
2577 main_top_env = PL_top_env;
1035 2578
2579 while (main_top_env->je_prev)
2580 main_top_env = main_top_env->je_prev;
2581
2582 {
2583 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2584
2585 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2586 hv_store_ent (PL_custom_op_names, slf,
2587 newSVpv ("coro_slf", 0), 0);
2588
2589 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2590 hv_store_ent (PL_custom_op_descs, slf,
2591 newSVpv ("coro schedule like function", 0), 0);
2592 }
2593
1036 coroapi.ver = CORO_API_VERSION; 2594 coroapi.ver = CORO_API_VERSION;
2595 coroapi.rev = CORO_API_REVISION;
2596
1037 coroapi.transfer = api_transfer; 2597 coroapi.transfer = api_transfer;
2598
2599 coroapi.sv_state = SvSTATE_;
2600 coroapi.execute_slf = api_execute_slf;
2601 coroapi.prepare_nop = prepare_nop;
2602 coroapi.prepare_schedule = prepare_schedule;
2603 coroapi.prepare_cede = prepare_cede;
2604 coroapi.prepare_cede_notself = prepare_cede_notself;
2605
2606 {
2607 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2608
2609 if (!svp) croak ("Time::HiRes is required");
2610 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2611
2612 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2613 }
1038 2614
1039 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2615 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1040} 2616}
1041 2617
1042SV * 2618SV *
1043new (char *klass, ...) 2619new (char *klass, ...)
2620 ALIAS:
2621 Coro::new = 1
1044 CODE: 2622 CODE:
1045{ 2623{
1046 struct coro *coro; 2624 struct coro *coro;
2625 MAGIC *mg;
1047 HV *hv; 2626 HV *hv;
2627 CV *cb;
1048 int i; 2628 int i;
1049 2629
2630 if (items > 1)
2631 {
2632 cb = coro_sv_2cv (ST (1));
2633
2634 if (CvISXSUB (cb))
2635 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2636
2637 if (!CvROOT (cb))
2638 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2639 }
2640
1050 Newz (0, coro, 1, struct coro); 2641 Newz (0, coro, 1, struct coro);
1051 coro->args = newAV (); 2642 coro->args = newAV ();
2643 coro->flags = CF_NEW;
1052 2644
2645 if (coro_first) coro_first->prev = coro;
2646 coro->next = coro_first;
2647 coro_first = coro;
2648
1053 hv = newHV (); 2649 coro->hv = hv = newHV ();
1054 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2650 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2651 mg->mg_flags |= MGf_DUP;
1055 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2652 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056 2653
2654 if (items > 1)
2655 {
2656 av_extend (coro->args, items - 1 + ix);
2657
2658 if (ix)
2659 {
2660 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2661 cb = coro_run_cv;
2662 }
2663
2664 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2665
1057 for (i = 1; i < items; i++) 2666 for (i = 2; i < items; i++)
1058 av_push (coro->args, newSVsv (ST (i))); 2667 av_push (coro->args, newSVsv (ST (i)));
2668 }
1059} 2669}
1060 OUTPUT: 2670 OUTPUT:
1061 RETVAL 2671 RETVAL
1062 2672
1063void 2673void
1064_set_stacklevel (...) 2674transfer (...)
1065 ALIAS: 2675 PROTOTYPE: $$
1066 Coro::State::transfer = 1 2676 CODE:
1067 Coro::schedule = 2 2677 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1068 Coro::cede = 3
1069 Coro::Cont::yield = 4
1070 CODE:
1071{
1072 struct transfer_args ta;
1073 2678
1074 switch (ix) 2679bool
1075 { 2680_destroy (SV *coro_sv)
1076 case 0: 2681 CODE:
1077 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2682 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1078 ta.next = 0; 2683 OUTPUT:
1079 ta.flags = TRANSFER_SET_STACKLEVEL; 2684 RETVAL
1080 break;
1081
1082 case 1:
1083 if (items != 3)
1084 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1085
1086 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1087 break;
1088
1089 case 2:
1090 prepare_schedule (&ta);
1091 break;
1092
1093 case 3:
1094 prepare_cede (&ta);
1095 break;
1096
1097 case 4:
1098 {
1099 SV *yieldstack;
1100 SV *sv;
1101 AV *defav = GvAV (PL_defgv);
1102
1103 yieldstack = *hv_fetch (
1104 (HV *)SvRV (GvSV (coro_current)),
1105 "yieldstack", sizeof ("yieldstack") - 1,
1106 0
1107 );
1108
1109 /* set up @_ -- ugly */
1110 av_clear (defav);
1111 av_fill (defav, items - 1);
1112 while (items--)
1113 av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115 sv = av_pop ((AV *)SvRV (yieldstack));
1116 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118 ta.flags = 0;
1119 SvREFCNT_dec (sv);
1120 }
1121 break;
1122
1123 }
1124
1125 TRANSFER (ta);
1126}
1127 2685
1128void 2686void
1129_clone_state_from (SV *dst, SV *src)
1130 CODE:
1131{
1132 struct coro *coro_src = SvSTATE (src);
1133
1134 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136 ++coro_src->refcnt;
1137 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138}
1139
1140void
1141_exit (code) 2687_exit (int code)
1142 int code
1143 PROTOTYPE: $ 2688 PROTOTYPE: $
1144 CODE: 2689 CODE:
1145 _exit (code); 2690 _exit (code);
1146 2691
1147int 2692int
2693cctx_stacksize (int new_stacksize = 0)
2694 PROTOTYPE: ;$
2695 CODE:
2696 RETVAL = cctx_stacksize;
2697 if (new_stacksize)
2698 {
2699 cctx_stacksize = new_stacksize;
2700 ++cctx_gen;
2701 }
2702 OUTPUT:
2703 RETVAL
2704
2705int
2706cctx_max_idle (int max_idle = 0)
2707 PROTOTYPE: ;$
2708 CODE:
2709 RETVAL = cctx_max_idle;
2710 if (max_idle > 1)
2711 cctx_max_idle = max_idle;
2712 OUTPUT:
2713 RETVAL
2714
2715int
1148cctx_count () 2716cctx_count ()
2717 PROTOTYPE:
1149 CODE: 2718 CODE:
1150 RETVAL = cctx_count; 2719 RETVAL = cctx_count;
1151 OUTPUT: 2720 OUTPUT:
1152 RETVAL 2721 RETVAL
1153 2722
1154int 2723int
1155cctx_idle () 2724cctx_idle ()
2725 PROTOTYPE:
1156 CODE: 2726 CODE:
1157 RETVAL = cctx_idle; 2727 RETVAL = cctx_idle;
1158 OUTPUT: 2728 OUTPUT:
1159 RETVAL 2729 RETVAL
1160 2730
2731void
2732list ()
2733 PROTOTYPE:
2734 PPCODE:
2735{
2736 struct coro *coro;
2737 for (coro = coro_first; coro; coro = coro->next)
2738 if (coro->hv)
2739 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2740}
2741
2742void
2743call (Coro::State coro, SV *coderef)
2744 ALIAS:
2745 eval = 1
2746 CODE:
2747{
2748 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2749 {
2750 struct coro temp;
2751
2752 if (!(coro->flags & CF_RUNNING))
2753 {
2754 PUTBACK;
2755 save_perl (aTHX_ &temp);
2756 load_perl (aTHX_ coro);
2757 }
2758
2759 {
2760 dSP;
2761 ENTER;
2762 SAVETMPS;
2763 PUTBACK;
2764 PUSHSTACK;
2765 PUSHMARK (SP);
2766
2767 if (ix)
2768 eval_sv (coderef, 0);
2769 else
2770 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2771
2772 POPSTACK;
2773 SPAGAIN;
2774 FREETMPS;
2775 LEAVE;
2776 PUTBACK;
2777 }
2778
2779 if (!(coro->flags & CF_RUNNING))
2780 {
2781 save_perl (aTHX_ coro);
2782 load_perl (aTHX_ &temp);
2783 SPAGAIN;
2784 }
2785 }
2786}
2787
2788SV *
2789is_ready (Coro::State coro)
2790 PROTOTYPE: $
2791 ALIAS:
2792 is_ready = CF_READY
2793 is_running = CF_RUNNING
2794 is_new = CF_NEW
2795 is_destroyed = CF_DESTROYED
2796 CODE:
2797 RETVAL = boolSV (coro->flags & ix);
2798 OUTPUT:
2799 RETVAL
2800
2801void
2802throw (Coro::State self, SV *throw = &PL_sv_undef)
2803 PROTOTYPE: $;$
2804 CODE:
2805{
2806 struct coro *current = SvSTATE_current;
2807 SV **throwp = self == current ? &CORO_THROW : &self->except;
2808 SvREFCNT_dec (*throwp);
2809 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2810}
2811
2812void
2813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2814 PROTOTYPE: $;$
2815 C_ARGS: aTHX_ coro, flags
2816
2817SV *
2818has_cctx (Coro::State coro)
2819 PROTOTYPE: $
2820 CODE:
2821 RETVAL = boolSV (!!coro->cctx);
2822 OUTPUT:
2823 RETVAL
2824
2825int
2826is_traced (Coro::State coro)
2827 PROTOTYPE: $
2828 CODE:
2829 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2830 OUTPUT:
2831 RETVAL
2832
2833UV
2834rss (Coro::State coro)
2835 PROTOTYPE: $
2836 ALIAS:
2837 usecount = 1
2838 CODE:
2839 switch (ix)
2840 {
2841 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2842 case 1: RETVAL = coro->usecount; break;
2843 }
2844 OUTPUT:
2845 RETVAL
2846
2847void
2848force_cctx ()
2849 PROTOTYPE:
2850 CODE:
2851 SvSTATE_current->cctx->idle_sp = 0;
2852
2853void
2854swap_defsv (Coro::State self)
2855 PROTOTYPE: $
2856 ALIAS:
2857 swap_defav = 1
2858 CODE:
2859 if (!self->slot)
2860 croak ("cannot swap state with coroutine that has no saved state,");
2861 else
2862 {
2863 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2864 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2865
2866 SV *tmp = *src; *src = *dst; *dst = tmp;
2867 }
2868
2869
1161MODULE = Coro::State PACKAGE = Coro 2870MODULE = Coro::State PACKAGE = Coro
1162 2871
1163BOOT: 2872BOOT:
1164{ 2873{
1165 int i; 2874 int i;
1166 2875
2876 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2877 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2878 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2879 coro_run_cv = get_cv (aTHX_ "Coro::_terminate", GV_ADD);
2880 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2881 SvREADONLY_on (coro_current);
2882
1167 coro_stash = gv_stashpv ("Coro", TRUE); 2883 coro_stash = gv_stashpv ("Coro", TRUE);
1168 2884
1169 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2885 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2886 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2887 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2888 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2889 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2890 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175 2891
1176 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2892 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180 coro_ready[i] = newAV (); 2893 coro_ready[i] = newAV ();
1181 2894
1182 { 2895 {
1183 SV *sv = perl_get_sv("Coro::API", 1); 2896 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1184 2897
1185 coroapi.schedule = api_schedule; 2898 coroapi.schedule = api_schedule;
1186 coroapi.cede = api_cede; 2899 coroapi.cede = api_cede;
2900 coroapi.cede_notself = api_cede_notself;
1187 coroapi.ready = api_ready; 2901 coroapi.ready = api_ready;
1188 coroapi.is_ready = api_is_ready; 2902 coroapi.is_ready = api_is_ready;
1189 coroapi.nready = &coro_nready; 2903 coroapi.nready = coro_nready;
1190 coroapi.current = coro_current; 2904 coroapi.current = coro_current;
1191 2905
1192 GCoroAPI = &coroapi; 2906 /*GCoroAPI = &coroapi;*/
1193 sv_setiv (sv, (IV)&coroapi); 2907 sv_setiv (sv, (IV)&coroapi);
1194 SvREADONLY_on (sv); 2908 SvREADONLY_on (sv);
1195 } 2909 }
1196} 2910}
1197 2911
2912void
2913schedule (...)
2914 CODE:
2915 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2916
2917void
2918cede (...)
2919 CODE:
2920 CORO_EXECUTE_SLF_XS (slf_init_cede);
2921
2922void
2923cede_notself (...)
2924 CODE:
2925 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2926
2927void
2928_set_current (SV *current)
2929 PROTOTYPE: $
2930 CODE:
2931 SvREFCNT_dec (SvRV (coro_current));
2932 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2933
2934void
2935_set_readyhook (SV *hook)
2936 PROTOTYPE: $
2937 CODE:
2938 SvREFCNT_dec (coro_readyhook);
2939 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2940
1198int 2941int
1199prio (Coro::State coro, int newprio = 0) 2942prio (Coro::State coro, int newprio = 0)
2943 PROTOTYPE: $;$
1200 ALIAS: 2944 ALIAS:
1201 nice = 1 2945 nice = 1
1202 CODE: 2946 CODE:
1203{ 2947{
1204 RETVAL = coro->prio; 2948 RETVAL = coro->prio;
1205 2949
1206 if (items > 1) 2950 if (items > 1)
1207 { 2951 {
1208 if (ix) 2952 if (ix)
1209 newprio += coro->prio; 2953 newprio = coro->prio - newprio;
1210 2954
1211 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2955 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2956 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213 2957
1214 coro->prio = newprio; 2958 coro->prio = newprio;
1215 } 2959 }
1216} 2960}
2961 OUTPUT:
2962 RETVAL
1217 2963
1218SV * 2964SV *
1219ready (SV *self) 2965ready (SV *self)
1220 PROTOTYPE: $ 2966 PROTOTYPE: $
1221 CODE: 2967 CODE:
1222 RETVAL = boolSV (api_ready (self)); 2968 RETVAL = boolSV (api_ready (aTHX_ self));
1223 OUTPUT:
1224 RETVAL
1225
1226SV *
1227is_ready (SV *self)
1228 PROTOTYPE: $
1229 CODE:
1230 RETVAL = boolSV (api_is_ready (self));
1231 OUTPUT: 2969 OUTPUT:
1232 RETVAL 2970 RETVAL
1233 2971
1234int 2972int
1235nready (...) 2973nready (...)
… …
1237 CODE: 2975 CODE:
1238 RETVAL = coro_nready; 2976 RETVAL = coro_nready;
1239 OUTPUT: 2977 OUTPUT:
1240 RETVAL 2978 RETVAL
1241 2979
1242MODULE = Coro::State PACKAGE = Coro::AIO 2980# for async_pool speedup
2981void
2982_pool_1 (SV *cb)
2983 CODE:
2984{
2985 HV *hv = (HV *)SvRV (coro_current);
2986 struct coro *coro = SvSTATE_hv ((SV *)hv);
2987 AV *defav = GvAV (PL_defgv);
2988 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2989 AV *invoke_av;
2990 int i, len;
2991
2992 if (!invoke)
2993 {
2994 SV *old = PL_diehook;
2995 PL_diehook = 0;
2996 SvREFCNT_dec (old);
2997 croak ("\3async_pool terminate\2\n");
2998 }
2999
3000 SvREFCNT_dec (coro->saved_deffh);
3001 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
3002
3003 hv_store (hv, "desc", sizeof ("desc") - 1,
3004 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
3005
3006 invoke_av = (AV *)SvRV (invoke);
3007 len = av_len (invoke_av);
3008
3009 sv_setsv (cb, AvARRAY (invoke_av)[0]);
3010
3011 if (len > 0)
3012 {
3013 av_fill (defav, len - 1);
3014 for (i = 0; i < len; ++i)
3015 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
3016 }
3017}
3018
3019void
3020_pool_2 (SV *cb)
3021 CODE:
3022{
3023 HV *hv = (HV *)SvRV (coro_current);
3024 struct coro *coro = SvSTATE_hv ((SV *)hv);
3025
3026 sv_setsv (cb, &PL_sv_undef);
3027
3028 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
3029 coro->saved_deffh = 0;
3030
3031 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
3032 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3033 {
3034 SV *old = PL_diehook;
3035 PL_diehook = 0;
3036 SvREFCNT_dec (old);
3037 croak ("\3async_pool terminate\2\n");
3038 }
3039
3040 av_clear (GvAV (PL_defgv));
3041 hv_store (hv, "desc", sizeof ("desc") - 1,
3042 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3043
3044 coro->prio = 0;
3045
3046 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3047 api_trace (aTHX_ coro_current, 0);
3048
3049 av_push (av_async_pool, newSVsv (coro_current));
3050}
1243 3051
1244SV * 3052SV *
1245_get_state () 3053rouse_cb ()
3054 PROTOTYPE:
1246 CODE: 3055 CODE:
1247{ 3056 RETVAL = coro_new_rouse_cb (aTHX);
1248 struct {
1249 int errorno;
1250 int laststype;
1251 int laststatval;
1252 Stat_t statcache;
1253 } data;
1254
1255 data.errorno = errno;
1256 data.laststype = PL_laststype;
1257 data.laststatval = PL_laststatval;
1258 data.statcache = PL_statcache;
1259
1260 RETVAL = newSVpvn ((char *)&data, sizeof data);
1261}
1262 OUTPUT: 3057 OUTPUT:
1263 RETVAL 3058 RETVAL
1264 3059
1265void 3060void
1266_set_state (char *data_) 3061rouse_wait (...)
1267 PROTOTYPE: $ 3062 PROTOTYPE: ;$
3063 PPCODE:
3064 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3065
3066
3067MODULE = Coro::State PACKAGE = PerlIO::cede
3068
3069BOOT:
3070 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3071
3072
3073MODULE = Coro::State PACKAGE = Coro::Semaphore
3074
3075SV *
3076new (SV *klass, SV *count = 0)
1268 CODE: 3077 CODE:
3078 RETVAL = sv_bless (
3079 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3080 GvSTASH (CvGV (cv))
3081 );
3082 OUTPUT:
3083 RETVAL
3084
3085# helper for Coro::Channel
3086SV *
3087_alloc (int count)
3088 CODE:
3089 RETVAL = coro_waitarray_new (aTHX_ count);
3090 OUTPUT:
3091 RETVAL
3092
3093SV *
3094count (SV *self)
3095 CODE:
3096 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3097 OUTPUT:
3098 RETVAL
3099
3100void
3101up (SV *self, int adjust = 1)
3102 ALIAS:
3103 adjust = 1
3104 CODE:
3105 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3106
3107void
3108down (...)
3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3111
3112void
3113wait (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3116
3117void
3118try (SV *self)
3119 PPCODE:
1269{ 3120{
1270 struct { 3121 AV *av = (AV *)SvRV (self);
3122 SV *count_sv = AvARRAY (av)[0];
3123 IV count = SvIVX (count_sv);
3124
3125 if (count > 0)
3126 {
3127 --count;
3128 SvIVX (count_sv) = count;
3129 XSRETURN_YES;
3130 }
3131 else
3132 XSRETURN_NO;
3133}
3134
3135void
3136waiters (SV *self)
3137 PPCODE:
3138{
3139 AV *av = (AV *)SvRV (self);
3140 int wcount = AvFILLp (av) + 1 - 1;
3141
3142 if (GIMME_V == G_SCALAR)
3143 XPUSHs (sv_2mortal (newSViv (wcount)));
3144 else
3145 {
1271 int errorno; 3146 int i;
1272 int laststype; 3147 EXTEND (SP, wcount);
1273 int laststatval; 3148 for (i = 1; i <= wcount; ++i)
1274 Stat_t statcache; 3149 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1275 } *data = (void *)data_; 3150 }
1276
1277 errno = data->errorno;
1278 PL_laststype = data->laststype;
1279 PL_laststatval = data->laststatval;
1280 PL_statcache = data->statcache;
1281} 3151}
3152
3153MODULE = Coro::State PACKAGE = Coro::Signal
3154
3155SV *
3156new (SV *klass)
3157 CODE:
3158 RETVAL = sv_bless (
3159 coro_waitarray_new (aTHX_ 0),
3160 GvSTASH (CvGV (cv))
3161 );
3162 OUTPUT:
3163 RETVAL
3164
3165void
3166wait (...)
3167 CODE:
3168 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3169
3170void
3171broadcast (SV *self)
3172 CODE:
3173{
3174 AV *av = (AV *)SvRV (self);
3175 coro_signal_wake (aTHX_ av, AvFILLp (av));
3176}
3177
3178void
3179send (SV *self)
3180 CODE:
3181{
3182 AV *av = (AV *)SvRV (self);
3183
3184 if (AvFILLp (av))
3185 coro_signal_wake (aTHX_ av, 1);
3186 else
3187 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3188}
3189
3190IV
3191awaited (SV *self)
3192 CODE:
3193 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3194 OUTPUT:
3195 RETVAL
3196
3197
3198MODULE = Coro::State PACKAGE = Coro::AnyEvent
3199
3200BOOT:
3201 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3202
3203void
3204_schedule (...)
3205 CODE:
3206{
3207 static int incede;
3208
3209 api_cede_notself (aTHX);
3210
3211 ++incede;
3212 while (coro_nready >= incede && api_cede (aTHX))
3213 ;
3214
3215 sv_setsv (sv_activity, &PL_sv_undef);
3216 if (coro_nready >= incede)
3217 {
3218 PUSHMARK (SP);
3219 PUTBACK;
3220 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3221 }
3222
3223 --incede;
3224}
3225
3226
3227MODULE = Coro::State PACKAGE = Coro::AIO
3228
3229void
3230_register (char *target, char *proto, SV *req)
3231 CODE:
3232{
3233 CV *req_cv = coro_sv_2cv (req);
3234 /* newXSproto doesn't return the CV on 5.8 */
3235 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3236 sv_setpv ((SV *)slf_cv, proto);
3237 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3238}
3239

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