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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 1.299 by root, Wed Nov 19 00:06:55 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, don't ask
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;
109static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
110 185
111static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
113 188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
114/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 199typedef struct coro_cctx
200{
116 struct coro_cctx *next; 201 struct coro_cctx *next;
117 202
118 /* the stack */ 203 /* the stack */
119 void *sptr; 204 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
121 206
122 /* cpu state */ 207 /* cpu state */
123 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124 JMPENV *top_env; 210 JMPENV *top_env;
125 coro_context cctx; 211 coro_context cctx;
126 212
127 int inuse; 213 U32 gen;
128
129#if USE_VALGRIND 214#if CORO_USE_VALGRIND
130 int valgrind_id; 215 int valgrind_id;
131#endif 216#endif
217 unsigned char flags;
132} coro_cctx; 218} coro_cctx;
133 219
134enum { 220enum {
135 CF_RUNNING, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
136 CF_READY, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
137}; 225};
138 226
139/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
140struct coro { 228typedef struct
141 /* the c coroutine allocated to this perl coroutine, if any */ 229{
142 coro_cctx *cctx; 230 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; 231 AV *defav;
151 SV *defsv;
152 SV *errsv; 232 SV *errsv;
153 233 SV *irsgv;
154#define VAR(name,type) type name; 234#define VAR(name,type) type name;
155# include "state.h" 235# include "state.h"
156#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 AV *args; /* data associated with this coroutine (initial args) */
252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
157 259
158 /* coro process data */ 260 /* coro process data */
159 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
160}; 269};
161 270
162typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
163typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
164 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define PRIO_MAX 3
282#define PRIO_HIGH 1
283#define PRIO_NORMAL 0
284#define PRIO_LOW -1
285#define PRIO_IDLE -3
286#define PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
165static AV * 307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
326
327static AV *
166coro_clone_padlist (CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
167{ 329{
168 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
169 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
170 332
171 newpadlist = newAV (); 333 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
173#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#else 337#else
176 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
177#endif 339#endif
178 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
179 --AvFILLp (padlist); 341 --AvFILLp (padlist);
180 342
181 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
182 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
183 345
184 return newpadlist; 346 return newpadlist;
185} 347}
186 348
187static void 349static void
188free_padlist (AV *padlist) 350free_padlist (pTHX_ AV *padlist)
189{ 351{
190 /* may be during global destruction */ 352 /* may be during global destruction */
191 if (SvREFCNT (padlist)) 353 if (SvREFCNT (padlist))
192 { 354 {
193 I32 i = AvFILLp (padlist); 355 I32 i = AvFILLp (padlist);
… …
214 AV *padlist; 376 AV *padlist;
215 AV *av = (AV *)mg->mg_obj; 377 AV *av = (AV *)mg->mg_obj;
216 378
217 /* casting is fun. */ 379 /* casting is fun. */
218 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219 free_padlist (padlist); 381 free_padlist (aTHX_ padlist);
220 382
221 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
222 384
223 return 0; 385 return 0;
224} 386}
225 387
388#define CORO_MAGIC_type_cv 26
226#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
227 390
228static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
229 395
230#define CORO_MAGIC(cv) \ 396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
231 SvMAGIC (cv) \ 398 ? SvMAGIC (sv) \
232 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 : mg_find (sv, type))
233 ? SvMAGIC (cv) \ 400
234 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
235 : 0 404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
236 438
237/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
238static void 440static void
239get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
240{ 442{
241 MAGIC *mg = CORO_MAGIC (cv); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
242 AV *av; 444 AV *av;
243 445
244 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
245 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246 else 448 else
247 { 449 {
248#if 0 450#if CORO_PREFER_PERL_FUNCTIONS
249 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
250 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
251 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
252 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
253 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
254#else 457#else
255 CvPADLIST (cv) = coro_clone_padlist (cv); 458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256#endif 459#endif
257 } 460 }
258} 461}
259 462
260static void 463static void
261put_padlist (CV *cv) 464put_padlist (pTHX_ CV *cv)
262{ 465{
263 MAGIC *mg = CORO_MAGIC (cv); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
264 AV *av; 467 AV *av;
265 468
266 if (!mg) 469 if (expect_false (!mg))
267 { 470 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 }
273 471
274 av = (AV *)mg->mg_obj; 472 av = (AV *)mg->mg_obj;
275 473
276 if (AvFILLp (av) >= AvMAX (av)) 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
277 av_extend (av, AvMAX (av) + 1); 475 av_extend (av, AvMAX (av) + 1);
278 476
279 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280} 478}
281 479
282#define SB do { 480/** load & save, init *******************************************************/
283#define SE } while (0)
284 481
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 482static void
291load_state(Coro__State c) 483load_perl (pTHX_ Coro__State c)
292{ 484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
293#define VAR(name,type) PL_ ## name = c->name; 495 #define VAR(name,type) PL_ ## name = slot->name;
294# include "state.h" 496 # include "state.h"
295#undef VAR 497 #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);
300 498
301 { 499 {
302 dSP; 500 dSP;
501
303 CV *cv; 502 CV *cv;
304 503
305 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
306 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
307 { 506 {
308 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
309 CvDEPTH (cv) = PTR2IV (POPs); 508 CvDEPTH (cv) = PTR2IV (POPs);
310 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
311 } 510 }
312 511
313 PUTBACK; 512 PUTBACK;
314 } 513 }
315}
316 514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
517}
518
317static void 519static void
318save_state(Coro__State c, int flags) 520save_perl (pTHX_ Coro__State c)
319{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
320 { 525 {
321 dSP; 526 dSP;
322 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
324 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
326 /* 531 /*
327 * the worst thing you can imagine happens first - we have to save 532 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :( 533 * (and reinitialize) all cv's in the whole callchain :(
329 */ 534 */
330 535
331 PUSHs (Nullsv); 536 XPUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
333 for (;;) 538 for (;;)
334 { 539 {
335 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
336 { 541 {
337 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
338 543
339 if (CxTYPE(cx) == CXt_SUB) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
340 { 545 {
341 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
342 547
343 if (CvDEPTH (cv)) 548 if (expect_true (CvDEPTH (cv)))
344 { 549 {
345 EXTEND (SP, 3); 550 EXTEND (SP, 3);
346
347 PUSHs ((SV *)CvPADLIST(cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
348 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
349 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
350 554
351 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
352 get_padlist (cv); 556 get_padlist (aTHX_ cv);
353 } 557 }
354 } 558 }
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 } 559 }
364 560
365 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
366 break; 562 break;
367 563
368 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
369 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
370 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
371 } 567 }
372 568
373 PUTBACK; 569 PUTBACK;
374 } 570 }
375 571
376 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
377 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
378 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
379 583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
589 slot->defav = GvAV (PL_defgv);
590 slot->defsv = DEFSV;
591 slot->errsv = ERRSV;
592 slot->irsgv = GvSV (irsgv);
593
380#define VAR(name,type)c->name = PL_ ## name; 594 #define VAR(name,type) slot->name = PL_ ## name;
381# include "state.h" 595 # include "state.h"
382#undef VAR 596 #undef VAR
597 }
383} 598}
384 599
385/* 600/*
386 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
387 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
388 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
389 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
390 */ 605 */
606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
391static void 609static void
392coro_init_stacks () 610coro_init_stacks (pTHX)
393{ 611{
394 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 612 PL_curstackinfo = new_stackinfo(32, 8);
395 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
396 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398 616
399 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
400 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402 620
403 New(50,PL_tmps_stack,96,SV*); 621 New(50,PL_tmps_stack,32,SV*);
404 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
405 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
406 PL_tmps_max = 96; 624 PL_tmps_max = 32;
407 625
408 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
409 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
410 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
411 629
412#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
413 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
414#endif 632#endif
415 633
416 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
417 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
418 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
419 637
420 New(54,PL_savestack,96,ANY); 638 New(54,PL_savestack,24,ANY);
421 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
422 PL_savestack_max = 96; 640 PL_savestack_max = 24;
423 641
424#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
425 New(54,PL_retstack,8,OP*); 643 New(54,PL_retstack,4,OP*);
426 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
427 PL_retstack_max = 8; 645 PL_retstack_max = 4;
428#endif 646#endif
429} 647}
648#endif
430 649
431/* 650/*
432 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
433 */ 652 */
434static void 653static void
435coro_destroy_stacks () 654coro_destruct_stacks (pTHX)
436{ 655{
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) 656 while (PL_curstackinfo->si_next)
449 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
450 658
451 while (PL_curstackinfo) 659 while (PL_curstackinfo)
452 { 660 {
453 PERL_SI *p = PL_curstackinfo->si_prev; 661 PERL_SI *p = PL_curstackinfo->si_prev;
454 662
455 { /*D*//*remove*/
456 dSP;
457 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458 PUTBACK; /* possibly superfluous */
459 }
460
461 if (!IN_DESTRUCT) 663 if (!IN_DESTRUCT)
462 {
463 dounwind (-1);/*D*//*remove*/
464 SvREFCNT_dec (PL_curstackinfo->si_stack); 664 SvREFCNT_dec (PL_curstackinfo->si_stack);
465 }
466 665
467 Safefree (PL_curstackinfo->si_cxstack); 666 Safefree (PL_curstackinfo->si_cxstack);
468 Safefree (PL_curstackinfo); 667 Safefree (PL_curstackinfo);
469 PL_curstackinfo = p; 668 PL_curstackinfo = p;
470 } 669 }
471 670
472 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
473 Safefree (PL_markstack); 672 Safefree (PL_markstack);
474 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
475 Safefree (PL_savestack); 674 Safefree (PL_savestack);
476#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
477 Safefree (PL_retstack); 676 Safefree (PL_retstack);
478#endif 677#endif
479} 678}
480 679
680static size_t
681coro_rss (pTHX_ struct coro *coro)
682{
683 size_t rss = sizeof (*coro);
684
685 if (coro->mainstack)
686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
690 if (coro->flags & CF_RUNNING)
691 {
692 slot = &tmp_slot;
693
694 #define VAR(name,type) slot->name = PL_ ## name;
695 # include "state.h"
696 #undef VAR
697 }
698 else
699 slot = coro->slot;
700
701 if (slot)
702 {
703 rss += sizeof (slot->curstackinfo);
704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
706 rss += slot->tmps_max * sizeof (SV *);
707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
708 rss += slot->scopestack_max * sizeof (I32);
709 rss += slot->savestack_max * sizeof (ANY);
710
711#if !PERL_VERSION_ATLEAST (5,10,0)
712 rss += slot->retstack_max * sizeof (OP *);
713#endif
714 }
715 }
716
717 return rss;
718}
719
720/** coroutine stack handling ************************************************/
721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
481static void 742static int
482setup_coro (struct coro *coro) 743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro)
483{ 829{
484 /* 830 /*
485 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
486 */ 832 */
487
488 coro_init_stacks (); 833 coro_init_stacks (aTHX);
489 834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
490 PL_curcop = 0; 838 PL_comppad = 0;
491 PL_in_eval = 0;
492 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
493 858
494 { 859 {
495 dSP; 860 dSP;
496 LOGOP myop; 861 UNOP myop;
497 862
498 /* I have no idea why this is needed, but it is */ 863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
499 PUSHMARK (SP); 867 PUSHMARK (SP);
500 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
501 SvREFCNT_dec (GvAV (PL_defgv)); 869 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; 870 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); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514 SPAGAIN; 872 SPAGAIN;
515
516 ENTER; /* necessary e.g. for dounwind */
517 } 873 }
518}
519 874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
520static void 893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (CORO_THROW);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
521free_coro_mortal () 930free_coro_mortal (pTHX)
522{ 931{
523 if (coro_mortal) 932 if (expect_true (coro_mortal))
524 { 933 {
525 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
526 coro_mortal = 0; 935 coro_mortal = 0;
527 } 936 }
528} 937}
529 938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
530static void NOINLINE 1082static void NOINLINE
531prepare_cctx (coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
532{ 1084{
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; 1085 PL_top_env = &PL_start_env;
559 1086
1087 if (cctx->flags & CC_TRACE)
1088 PL_runops = runops_trace;
1089
1090 /* we already must be executing an SLF op, there is no other valid way
1091 * that can lead to creation of a new cctx */
1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1094
1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1096 cctx_ssl_cctx = cctx;
1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
560 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
561 prepare_cctx ((coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
562 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
563 /* somebody will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
1135 PL_restartop = PL_op;
564 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
565 1137
566 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1138 /*
567 abort (); 1139 * If perl-run returns we assume exit() was being called or the coro
1140 * fell off the end, which seems to be the only valid (non-bug)
1141 * reason for perl_run to return. We try to exit by jumping to the
1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1143 * coroutine as Coro has no such concept
1144 */
1145 PL_top_env = main_top_env;
1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
568} 1148}
569 1149
570static coro_cctx * 1150static coro_cctx *
571cctx_new () 1151cctx_new ()
572{ 1152{
573 coro_cctx *cctx; 1153 coro_cctx *cctx;
574 1154
575 ++cctx_count; 1155 ++cctx_count;
576
577 New (0, cctx, 1, coro_cctx); 1156 New (0, cctx, 1, coro_cctx);
578 1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182 void *stack_start;
1183 size_t stack_size;
1184
579#if HAVE_MMAP 1185#if HAVE_MMAP
580
581 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582 /* mmap suppsedly does allocate-on-write for us */ 1187 /* 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); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584 1189
585 if (cctx->sptr == (void *)-1) 1190 if (cctx->sptr != (void *)-1)
1191 {
1192 #if CORO_STACKGUARD
1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1194 #endif
1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1197 cctx->flags |= CC_MAPPED;
586 { 1198 }
1199 else
1200#endif
1201 {
1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1203 New (0, cctx->sptr, cctx_stacksize, long);
1204
1205 if (!cctx->sptr)
1206 {
587 perror ("FATAL: unable to mmap stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
588 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
589 } 1209 }
590 1210
591# if STACKGUARD 1211 stack_start = cctx->sptr;
592 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1212 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 { 1213 }
602 perror ("FATAL: unable to malloc stack for coroutine");
603 _exit (EXIT_FAILURE);
604 }
605 1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
606#endif 1217 #endif
607 1218
608#if USE_VALGRIND 1219 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 1220
617 return cctx; 1221 return cctx;
618} 1222}
619 1223
620static void 1224static void
… …
622{ 1226{
623 if (!cctx) 1227 if (!cctx)
624 return; 1228 return;
625 1229
626 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
627 1232
628#if USE_VALGRIND 1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1236 #if CORO_USE_VALGRIND
629 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630#endif 1238 #endif
631 1239
632#if HAVE_MMAP 1240#if HAVE_MMAP
1241 if (cctx->flags & CC_MAPPED)
633 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
634#else 1243 else
1244#endif
635 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
636#endif 1246 }
637 1247
638 Safefree (cctx); 1248 Safefree (cctx);
639} 1249}
640 1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1253
641static coro_cctx * 1254static coro_cctx *
642cctx_get () 1255cctx_get (pTHX)
643{ 1256{
644 coro_cctx *cctx; 1257 while (expect_true (cctx_first))
645
646 if (cctx_first)
647 { 1258 {
648 cctx = cctx_first; 1259 coro_cctx *cctx = cctx_first;
649 cctx_first = cctx->next; 1260 cctx_first = cctx->next;
650 --cctx_idle; 1261 --cctx_idle;
651 } 1262
652 else 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
653 { 1264 return cctx;
654 cctx = cctx_new (); 1265
655 PL_op = PL_op->op_next; 1266 cctx_destroy (cctx);
656 } 1267 }
657 1268
658 return cctx; 1269 return cctx_new_run ();
659} 1270}
660 1271
661static void 1272static void
662cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
663{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
664 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
665 if (cctx_idle >= MAX_IDLE_CCTX) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
666 { 1279 {
667 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
668 cctx_first = first->next; 1281 cctx_first = first->next;
669 --cctx_idle; 1282 --cctx_idle;
670 1283
671 assert (!first->inuse);
672 cctx_destroy (first); 1284 cctx_destroy (first);
673 } 1285 }
674 1286
675 ++cctx_idle; 1287 ++cctx_idle;
676 cctx->next = cctx_first; 1288 cctx->next = cctx_first;
677 cctx_first = cctx; 1289 cctx_first = cctx;
678} 1290}
679 1291
680/* never call directly, always through the coro_state_transfer global variable */ 1292/** coroutine switching *****************************************************/
681static void NOINLINE 1293
1294static void
1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
682transfer (struct coro *prev, struct coro *next, int flags) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
683{ 1320{
684 dSTACKLEVEL; 1321 dSTACKLEVEL;
685 1322
686 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
687 if (flags == TRANSFER_SET_STACKLEVEL) 1324 if (expect_false (!next))
1325 {
688 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328 }
689 else if (prev != next) 1329 else if (expect_true (prev != next))
690 { 1330 {
691 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
692 1332
693 if (!prev->cctx) 1333 if (expect_false (prev->flags & CF_NEW))
694 { 1334 {
695 /* create a new empty context */ 1335 /* create a new empty/source context */
696 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
697 prev->cctx->inuse = 1; 1337 prev->flags &= ~CF_NEW;
698 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
699 } 1339 }
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 1340
707 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
708 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
709 1343
710 LOCK; 1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
711 1346
712 if (next->mainstack) 1347 if (expect_false (next->flags & CF_NEW))
713 { 1348 {
714 /* coroutine already started */ 1349 /* need to start coroutine */
715 SAVE (prev, flags); 1350 next->flags &= ~CF_NEW;
716 LOAD (next); 1351 /* setup coroutine call */
1352 coro_setup (aTHX_ next);
717 } 1353 }
718 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
719 { 1365 {
720 /* need to start coroutine */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
721 /* first get rid of the old state */ 1367 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); 1368
723 /* setup coroutine call */ 1369 prev->cctx = 0;
724 setup_coro (next); 1370
725 /* need a new stack */ 1371 /* 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); 1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
727 } 1378 }
728 1379
729 prev__cctx = prev->cctx; 1380 ++next->usecount;
730 1381
731 /* possibly "free" the cctx */ 1382 if (expect_true (!next->cctx))
732 if (prev__cctx->idle_sp == STACKLEVEL) 1383 next->cctx = cctx_get (aTHX);
1384
1385 if (expect_false (prev__cctx != next->cctx))
733 { 1386 {
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; 1387 prev__cctx->top_env = PL_top_env;
753 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
754 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755 } 1390 }
756 1391
757 free_coro_mortal (); 1392 transfer_tail (aTHX);
758
759 UNLOCK;
760 } 1393 }
761} 1394}
762 1395
763struct transfer_args 1396#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) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
770 1398
1399/** high level stuff ********************************************************/
1400
771static void 1401static int
772coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
773{ 1403{
774 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
775 return; 1405 return 0;
776 1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
777 if (coro->flags & CF_RUNNING) 1412 if (coro->flags & CF_READY)
778 croak ("FATAL: tried to destroy currently running coroutine"); 1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779 1420
780 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
781 { 1422 {
782 struct coro temp; 1423 struct coro temp;
783 1424
784 SAVE ((&temp), TRANSFER_SAVE_ALL); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
785 LOAD (coro);
786 1426
787 coro_destroy_stacks (); 1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
788 1429
789 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1430 coro_destruct (aTHX_ coro);
790 1431
1432 load_perl (aTHX_ &temp);
1433
791 coro->mainstack = 0; 1434 coro->slot = 0;
792 } 1435 }
793 1436
794 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
795 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
796 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
797} 1445}
798 1446
799static int 1447static int
800coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801{ 1449{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
803 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
804 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
805 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
806 1460
807 return 0; 1461 return 0;
808} 1462}
809 1463
810static int 1464static int
… …
817 return 0; 1471 return 0;
818} 1472}
819 1473
820static MGVTBL coro_state_vtbl = { 1474static MGVTBL coro_state_vtbl = {
821 0, 0, 0, 0, 1475 0, 0, 0, 0,
822 coro_state_clear, 1476 coro_state_free,
823 0, 1477 0,
824#ifdef MGf_DUP 1478#ifdef MGf_DUP
825 coro_state_dup, 1479 coro_state_dup,
826#else 1480#else
827# define MGf_DUP 0 1481# define MGf_DUP 0
828#endif 1482#endif
829}; 1483};
830 1484
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 1485static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1487{
856 ta->prev = SvSTATE (prev); 1488 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1489 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1490 TRANSFER_CHECK (*ta);
859} 1491}
860 1492
861static void 1493static void
862api_transfer (SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
863{ 1495{
864 dTHX;
865 struct transfer_args ta; 1496 struct coro_transfer_args ta;
866 1497
867 prepare_transfer (&ta, prev, next, flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1499 TRANSFER (ta, 1);
869} 1500}
870 1501
871/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
872 1503
873#define PRIO_MAX 3 1504INLINE void
874#define PRIO_HIGH 1 1505coro_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{ 1506{
888 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
889 coro_nready++;
890} 1508}
891 1509
892static SV * 1510INLINE SV *
893coro_deq (int min_prio) 1511coro_deq (pTHX)
894{ 1512{
895 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
896 1514
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; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
902 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
903 {
904 coro_nready--;
905 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
906 }
907 1518
908 return 0; 1519 return 0;
909} 1520}
910 1521
911static int 1522static int
912api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
913{ 1524{
914 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
915 1528
916 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
917 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
918 1531
919 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
920 1533
921 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
922 return 0; 1535 return 0;
923 1536
924 if (coro->flags & CF_RUNNING)
925 croak ("Coro::ready called on currently running coroutine");
926
927 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
928 1538
929 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
930 coro_enq (SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
931 UNLOCK; 1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
932 1562
933 return 1; 1563 return 1;
934} 1564}
935 1565
936static int 1566static int
937api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
938{ 1568{
939 return !!SvSTATE (coro_sv)->flags & CF_READY; 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
940} 1570}
941 1571
942static void 1572INLINE void
943prepare_schedule (struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
944{ 1574{
945 SV *current, *prev, *next; 1575 SV *prev_sv, *next_sv;
946
947 current = GvSV (coro_current);
948 1576
949 for (;;) 1577 for (;;)
950 { 1578 {
951 LOCK;
952 next = coro_deq (PRIO_MIN); 1579 next_sv = coro_deq (aTHX);
953 UNLOCK;
954 1580
955 if (next) 1581 /* nothing to schedule: call the idle handler */
956 break; 1582 if (expect_false (!next_sv))
957
958 { 1583 {
959 dSP; 1584 dSP;
960 1585
961 ENTER; 1586 ENTER;
962 SAVETMPS; 1587 SAVETMPS;
963 1588
964 PUSHMARK (SP); 1589 PUSHMARK (SP);
965 PUTBACK; 1590 PUTBACK;
966 call_sv (GvSV (coro_idle), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
967 1592
968 FREETMPS; 1593 FREETMPS;
969 LEAVE; 1594 LEAVE;
1595 continue;
970 } 1596 }
971 }
972 1597
973 prev = SvRV (current); 1598 ta->next = SvSTATE_hv (next_sv);
974 SvRV (current) = next; 1599
1600 /* cannot transfer to destroyed coros, skip and look for next */
1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1602 {
1603 SvREFCNT_dec (next_sv);
1604 /* coro_nready has already been taken care of by destroy */
1605 continue;
1606 }
1607
1608 --coro_nready;
1609 break;
1610 }
975 1611
976 /* free this only after the transfer */ 1612 /* free this only after the transfer */
977 LOCK; 1613 prev_sv = SvRV (coro_current);
978 free_coro_mortal ();
979 UNLOCK;
980 coro_mortal = prev;
981
982 ta->prev = SvSTATE (prev); 1614 ta->prev = SvSTATE_hv (prev_sv);
983 ta->next = SvSTATE (next); 1615 TRANSFER_CHECK (*ta);
984 ta->flags = TRANSFER_SAVE_ALL; 1616 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; 1617 ta->next->flags &= ~CF_READY;
987} 1618 SvRV_set (coro_current, next_sv);
988 1619
989static void 1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622}
1623
1624INLINE void
990prepare_cede (struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
991{ 1626{
992 api_ready (GvSV (coro_current)); 1627 api_ready (aTHX_ coro_current);
993
994 prepare_schedule (ta); 1628 prepare_schedule (aTHX_ ta);
995} 1629}
996 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
997static void 1645static void
998api_schedule (void) 1646api_schedule (pTHX)
999{ 1647{
1000 dTHX;
1001 struct transfer_args ta; 1648 struct coro_transfer_args ta;
1002 1649
1003 prepare_schedule (&ta); 1650 prepare_schedule (aTHX_ &ta);
1004 TRANSFER (ta); 1651 TRANSFER (ta, 1);
1005} 1652}
1006 1653
1007static void 1654static int
1008api_cede (void) 1655api_cede (pTHX)
1009{ 1656{
1010 dTHX;
1011 struct transfer_args ta; 1657 struct coro_transfer_args ta;
1012 1658
1013 prepare_cede (&ta); 1659 prepare_cede (aTHX_ &ta);
1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1014 TRANSFER (ta); 1663 TRANSFER (ta, 1);
1664 return 1;
1665 }
1666 else
1667 return 0;
1015} 1668}
1016 1669
1670static int
1671api_cede_notself (pTHX)
1672{
1673 if (coro_nready)
1674 {
1675 struct coro_transfer_args ta;
1676
1677 prepare_cede_notself (aTHX_ &ta);
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static SV *
2003coro_semaphore_new (int count)
2004{
2005 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2006 AV *av = newAV ();
2007 SV **ary;
2008
2009 /* unfortunately, building manually saves memory */
2010 Newx (ary, 2, SV *);
2011 AvALLOC (av) = ary;
2012 AvARRAY (av) = ary;
2013 AvMAX (av) = 1;
2014 AvFILLp (av) = 0;
2015 ary [0] = newSViv (count);
2016
2017 return newRV_noinc ((SV *)av);
2018}
2019
2020static void
2021coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2022{
2023 SV *count_sv = AvARRAY (av)[0];
2024 IV count = SvIVX (count_sv);
2025
2026 count += adjust;
2027 SvIVX (count_sv) = count;
2028
2029 /* now wake up as many waiters as are expected to lock */
2030 while (count > 0 && AvFILLp (av) > 0)
2031 {
2032 SV *cb;
2033
2034 /* swap first two elements so we can shift a waiter */
2035 AvARRAY (av)[0] = AvARRAY (av)[1];
2036 AvARRAY (av)[1] = count_sv;
2037 cb = av_shift (av);
2038
2039 if (SvOBJECT (cb))
2040 api_ready (aTHX_ cb);
2041 else
2042 croak ("callbacks not yet supported");
2043
2044 SvREFCNT_dec (cb);
2045
2046 --count;
2047 }
2048}
2049
2050static void
2051coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2052{
2053 /* call $sem->adjust (0) to possibly wake up some other waiters */
2054 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2055}
2056
2057static int
2058slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2059{
2060 AV *av = (AV *)frame->data;
2061 SV *count_sv = AvARRAY (av)[0];
2062
2063 /* if we are about to throw, don't actually acquire the lock, just throw */
2064 if (CORO_THROW)
2065 return 0;
2066 else if (SvIVX (count_sv) > 0)
2067 {
2068 SvSTATE_current->on_destroy = 0;
2069
2070 if (acquire)
2071 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2072 else
2073 coro_semaphore_adjust (aTHX_ av, 0);
2074
2075 return 0;
2076 }
2077 else
2078 {
2079 int i;
2080 /* if we were woken up but can't down, we look through the whole */
2081 /* waiters list and only add us if we aren't in there already */
2082 /* this avoids some degenerate memory usage cases */
2083
2084 for (i = 1; i <= AvFILLp (av); ++i)
2085 if (AvARRAY (av)[i] == SvRV (coro_current))
2086 return 1;
2087
2088 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2089 return 1;
2090 }
2091}
2092
2093static int
2094slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2095{
2096 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2097}
2098
2099static int
2100slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2101{
2102 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2103}
2104
2105static void
2106slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2107{
2108 AV *av = (AV *)SvRV (arg [0]);
2109
2110 if (SvIVX (AvARRAY (av)[0]) > 0)
2111 {
2112 frame->data = (void *)av;
2113 frame->prepare = prepare_nop;
2114 }
2115 else
2116 {
2117 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2118
2119 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2120 frame->prepare = prepare_schedule;
2121
2122 /* to avoid race conditions when a woken-up coro gets terminated */
2123 /* we arrange for a temporary on_destroy that calls adjust (0) */
2124 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2125 }
2126}
2127
2128static void
2129slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2130{
2131 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2132 frame->check = slf_check_semaphore_down;
2133}
2134
2135static void
2136slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2137{
2138 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2139 frame->check = slf_check_semaphore_wait;
2140}
2141
2142/*****************************************************************************/
2143/* gensub: simple closure generation utility */
2144
2145#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2146
2147/* create a closure from XS, returns a code reference */
2148/* the arg can be accessed via GENSUB_ARG from the callback */
2149/* the callback must use dXSARGS/XSRETURN */
2150static SV *
2151gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2152{
2153 CV *cv = (CV *)newSV (0);
2154
2155 sv_upgrade ((SV *)cv, SVt_PVCV);
2156
2157 CvANON_on (cv);
2158 CvISXSUB_on (cv);
2159 CvXSUB (cv) = xsub;
2160 GENSUB_ARG = arg;
2161
2162 return newRV_noinc ((SV *)cv);
2163}
2164
2165/*****************************************************************************/
2166/* Coro::AIO */
2167
2168#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2169
2170/* helper storage struct */
2171struct io_state
2172{
2173 int errorno;
2174 I32 laststype; /* U16 in 5.10.0 */
2175 int laststatval;
2176 Stat_t statcache;
2177};
2178
2179static void
2180coro_aio_callback (pTHX_ CV *cv)
2181{
2182 dXSARGS;
2183 AV *state = (AV *)GENSUB_ARG;
2184 SV *coro = av_pop (state);
2185 SV *data_sv = newSV (sizeof (struct io_state));
2186
2187 av_extend (state, items);
2188
2189 sv_upgrade (data_sv, SVt_PV);
2190 SvCUR_set (data_sv, sizeof (struct io_state));
2191 SvPOK_only (data_sv);
2192
2193 {
2194 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2195
2196 data->errorno = errno;
2197 data->laststype = PL_laststype;
2198 data->laststatval = PL_laststatval;
2199 data->statcache = PL_statcache;
2200 }
2201
2202 /* now build the result vector out of all the parameters and the data_sv */
2203 {
2204 int i;
2205
2206 for (i = 0; i < items; ++i)
2207 av_push (state, SvREFCNT_inc_NN (ST (i)));
2208 }
2209
2210 av_push (state, data_sv);
2211
2212 api_ready (aTHX_ coro);
2213 SvREFCNT_dec (coro);
2214 SvREFCNT_dec ((AV *)state);
2215}
2216
2217static int
2218slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2219{
2220 AV *state = (AV *)frame->data;
2221
2222 /* if we are about to throw, return early */
2223 /* this does not cancel the aio request, but at least */
2224 /* it quickly returns */
2225 if (CORO_THROW)
2226 return 0;
2227
2228 /* one element that is an RV? repeat! */
2229 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2230 return 1;
2231
2232 /* restore status */
2233 {
2234 SV *data_sv = av_pop (state);
2235 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2236
2237 errno = data->errorno;
2238 PL_laststype = data->laststype;
2239 PL_laststatval = data->laststatval;
2240 PL_statcache = data->statcache;
2241
2242 SvREFCNT_dec (data_sv);
2243 }
2244
2245 /* push result values */
2246 {
2247 dSP;
2248 int i;
2249
2250 EXTEND (SP, AvFILLp (state) + 1);
2251 for (i = 0; i <= AvFILLp (state); ++i)
2252 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2253
2254 PUTBACK;
2255 }
2256
2257 return 0;
2258}
2259
2260static void
2261slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2262{
2263 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2264 SV *coro_hv = SvRV (coro_current);
2265 struct coro *coro = SvSTATE_hv (coro_hv);
2266
2267 /* put our coroutine id on the state arg */
2268 av_push (state, SvREFCNT_inc_NN (coro_hv));
2269
2270 /* first see whether we have a non-zero priority and set it as AIO prio */
2271 if (coro->prio)
2272 {
2273 dSP;
2274
2275 static SV *prio_cv;
2276 static SV *prio_sv;
2277
2278 if (expect_false (!prio_cv))
2279 {
2280 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2281 prio_sv = newSViv (0);
2282 }
2283
2284 PUSHMARK (SP);
2285 sv_setiv (prio_sv, coro->prio);
2286 XPUSHs (prio_sv);
2287
2288 PUTBACK;
2289 call_sv (prio_cv, G_VOID | G_DISCARD);
2290 }
2291
2292 /* now call the original request */
2293 {
2294 dSP;
2295 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2296 int i;
2297
2298 PUSHMARK (SP);
2299
2300 /* first push all args to the stack */
2301 EXTEND (SP, items + 1);
2302
2303 for (i = 0; i < items; ++i)
2304 PUSHs (arg [i]);
2305
2306 /* now push the callback closure */
2307 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2308
2309 /* now call the AIO function - we assume our request is uncancelable */
2310 PUTBACK;
2311 call_sv ((SV *)req, G_VOID | G_DISCARD);
2312 }
2313
2314 /* now that the requets is going, we loop toll we have a result */
2315 frame->data = (void *)state;
2316 frame->prepare = prepare_schedule;
2317 frame->check = slf_check_aio_req;
2318}
2319
2320static void
2321coro_aio_req_xs (pTHX_ CV *cv)
2322{
2323 dXSARGS;
2324
2325 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2326
2327 XSRETURN_EMPTY;
2328}
2329
2330/*****************************************************************************/
2331
1017MODULE = Coro::State PACKAGE = Coro::State 2332MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018 2333
1019PROTOTYPES: DISABLE 2334PROTOTYPES: DISABLE
1020 2335
1021BOOT: 2336BOOT:
1022{ 2337{
1023#ifdef USE_ITHREADS 2338#ifdef USE_ITHREADS
1024 MUTEX_INIT (&coro_mutex); 2339# if CORO_PTHREAD
2340 coro_thx = PERL_GET_CONTEXT;
2341# endif
1025#endif 2342#endif
1026 BOOT_PAGESIZE; 2343 BOOT_PAGESIZE;
1027 2344
2345 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2346 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2347
2348 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2349 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2350 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2351
2352 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2353 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2354 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2355
1028 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2356 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029 2357
1030 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2358 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2359 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2360 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2361 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033 2362
1034 main_mainstack = PL_mainstack; 2363 main_mainstack = PL_mainstack;
2364 main_top_env = PL_top_env;
1035 2365
2366 while (main_top_env->je_prev)
2367 main_top_env = main_top_env->je_prev;
2368
2369 {
2370 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2371
2372 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2373 hv_store_ent (PL_custom_op_names, slf,
2374 newSVpv ("coro_slf", 0), 0);
2375
2376 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2377 hv_store_ent (PL_custom_op_descs, slf,
2378 newSVpv ("coro schedule like function", 0), 0);
2379 }
2380
1036 coroapi.ver = CORO_API_VERSION; 2381 coroapi.ver = CORO_API_VERSION;
2382 coroapi.rev = CORO_API_REVISION;
2383
1037 coroapi.transfer = api_transfer; 2384 coroapi.transfer = api_transfer;
2385
2386 coroapi.sv_state = SvSTATE_;
2387 coroapi.execute_slf = api_execute_slf;
2388 coroapi.prepare_nop = prepare_nop;
2389 coroapi.prepare_schedule = prepare_schedule;
2390 coroapi.prepare_cede = prepare_cede;
2391 coroapi.prepare_cede_notself = prepare_cede_notself;
2392
2393 {
2394 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2395
2396 if (!svp) croak ("Time::HiRes is required");
2397 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2398
2399 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2400 }
1038 2401
1039 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2402 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1040} 2403}
1041 2404
1042SV * 2405SV *
1043new (char *klass, ...) 2406new (char *klass, ...)
1044 CODE: 2407 CODE:
1045{ 2408{
1046 struct coro *coro; 2409 struct coro *coro;
2410 MAGIC *mg;
1047 HV *hv; 2411 HV *hv;
1048 int i; 2412 int i;
1049 2413
1050 Newz (0, coro, 1, struct coro); 2414 Newz (0, coro, 1, struct coro);
1051 coro->args = newAV (); 2415 coro->args = newAV ();
2416 coro->flags = CF_NEW;
1052 2417
2418 if (coro_first) coro_first->prev = coro;
2419 coro->next = coro_first;
2420 coro_first = coro;
2421
1053 hv = newHV (); 2422 coro->hv = hv = newHV ();
1054 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2423 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2424 mg->mg_flags |= MGf_DUP;
1055 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2425 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056 2426
2427 av_extend (coro->args, items - 1);
1057 for (i = 1; i < items; i++) 2428 for (i = 1; i < items; i++)
1058 av_push (coro->args, newSVsv (ST (i))); 2429 av_push (coro->args, newSVsv (ST (i)));
1059} 2430}
1060 OUTPUT: 2431 OUTPUT:
1061 RETVAL 2432 RETVAL
1062 2433
1063void 2434void
1064_set_stacklevel (...) 2435transfer (...)
1065 ALIAS: 2436 PROTOTYPE: $$
1066 Coro::State::transfer = 1 2437 CODE:
1067 Coro::schedule = 2 2438 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 2439
1074 switch (ix) 2440bool
1075 { 2441_destroy (SV *coro_sv)
1076 case 0: 2442 CODE:
1077 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2443 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1078 ta.next = 0; 2444 OUTPUT:
1079 ta.flags = TRANSFER_SET_STACKLEVEL; 2445 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 2446
1128void 2447void
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) 2448_exit (int code)
1142 int code
1143 PROTOTYPE: $ 2449 PROTOTYPE: $
1144 CODE: 2450 CODE:
1145 _exit (code); 2451 _exit (code);
1146 2452
1147int 2453int
2454cctx_stacksize (int new_stacksize = 0)
2455 PROTOTYPE: ;$
2456 CODE:
2457 RETVAL = cctx_stacksize;
2458 if (new_stacksize)
2459 {
2460 cctx_stacksize = new_stacksize;
2461 ++cctx_gen;
2462 }
2463 OUTPUT:
2464 RETVAL
2465
2466int
2467cctx_max_idle (int max_idle = 0)
2468 PROTOTYPE: ;$
2469 CODE:
2470 RETVAL = cctx_max_idle;
2471 if (max_idle > 1)
2472 cctx_max_idle = max_idle;
2473 OUTPUT:
2474 RETVAL
2475
2476int
1148cctx_count () 2477cctx_count ()
2478 PROTOTYPE:
1149 CODE: 2479 CODE:
1150 RETVAL = cctx_count; 2480 RETVAL = cctx_count;
1151 OUTPUT: 2481 OUTPUT:
1152 RETVAL 2482 RETVAL
1153 2483
1154int 2484int
1155cctx_idle () 2485cctx_idle ()
2486 PROTOTYPE:
1156 CODE: 2487 CODE:
1157 RETVAL = cctx_idle; 2488 RETVAL = cctx_idle;
1158 OUTPUT: 2489 OUTPUT:
1159 RETVAL 2490 RETVAL
1160 2491
2492void
2493list ()
2494 PROTOTYPE:
2495 PPCODE:
2496{
2497 struct coro *coro;
2498 for (coro = coro_first; coro; coro = coro->next)
2499 if (coro->hv)
2500 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2501}
2502
2503void
2504call (Coro::State coro, SV *coderef)
2505 ALIAS:
2506 eval = 1
2507 CODE:
2508{
2509 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2510 {
2511 struct coro temp;
2512
2513 if (!(coro->flags & CF_RUNNING))
2514 {
2515 PUTBACK;
2516 save_perl (aTHX_ &temp);
2517 load_perl (aTHX_ coro);
2518 }
2519
2520 {
2521 dSP;
2522 ENTER;
2523 SAVETMPS;
2524 PUTBACK;
2525 PUSHSTACK;
2526 PUSHMARK (SP);
2527
2528 if (ix)
2529 eval_sv (coderef, 0);
2530 else
2531 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2532
2533 POPSTACK;
2534 SPAGAIN;
2535 FREETMPS;
2536 LEAVE;
2537 PUTBACK;
2538 }
2539
2540 if (!(coro->flags & CF_RUNNING))
2541 {
2542 save_perl (aTHX_ coro);
2543 load_perl (aTHX_ &temp);
2544 SPAGAIN;
2545 }
2546 }
2547}
2548
2549SV *
2550is_ready (Coro::State coro)
2551 PROTOTYPE: $
2552 ALIAS:
2553 is_ready = CF_READY
2554 is_running = CF_RUNNING
2555 is_new = CF_NEW
2556 is_destroyed = CF_DESTROYED
2557 CODE:
2558 RETVAL = boolSV (coro->flags & ix);
2559 OUTPUT:
2560 RETVAL
2561
2562void
2563throw (Coro::State self, SV *throw = &PL_sv_undef)
2564 PROTOTYPE: $;$
2565 CODE:
2566{
2567 struct coro *current = SvSTATE_current;
2568 SV **throwp = self == current ? &CORO_THROW : &self->except;
2569 SvREFCNT_dec (*throwp);
2570 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2571}
2572
2573void
2574api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2575 PROTOTYPE: $;$
2576 C_ARGS: aTHX_ coro, flags
2577
2578SV *
2579has_cctx (Coro::State coro)
2580 PROTOTYPE: $
2581 CODE:
2582 RETVAL = boolSV (!!coro->cctx);
2583 OUTPUT:
2584 RETVAL
2585
2586int
2587is_traced (Coro::State coro)
2588 PROTOTYPE: $
2589 CODE:
2590 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2591 OUTPUT:
2592 RETVAL
2593
2594UV
2595rss (Coro::State coro)
2596 PROTOTYPE: $
2597 ALIAS:
2598 usecount = 1
2599 CODE:
2600 switch (ix)
2601 {
2602 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2603 case 1: RETVAL = coro->usecount; break;
2604 }
2605 OUTPUT:
2606 RETVAL
2607
2608void
2609force_cctx ()
2610 PROTOTYPE:
2611 CODE:
2612 SvSTATE_current->cctx->idle_sp = 0;
2613
2614void
2615swap_defsv (Coro::State self)
2616 PROTOTYPE: $
2617 ALIAS:
2618 swap_defav = 1
2619 CODE:
2620 if (!self->slot)
2621 croak ("cannot swap state with coroutine that has no saved state,");
2622 else
2623 {
2624 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2625 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2626
2627 SV *tmp = *src; *src = *dst; *dst = tmp;
2628 }
2629
2630
1161MODULE = Coro::State PACKAGE = Coro 2631MODULE = Coro::State PACKAGE = Coro
1162 2632
1163BOOT: 2633BOOT:
1164{ 2634{
1165 int i; 2635 int i;
1166 2636
2637 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2638 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2639 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2640
2641 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2642 SvREADONLY_on (coro_current);
2643
1167 coro_stash = gv_stashpv ("Coro", TRUE); 2644 coro_stash = gv_stashpv ("Coro", TRUE);
1168 2645
1169 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2646 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2647 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2648 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2649 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2650 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2651 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175 2652
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--; ) 2653 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180 coro_ready[i] = newAV (); 2654 coro_ready[i] = newAV ();
1181 2655
1182 { 2656 {
1183 SV *sv = perl_get_sv("Coro::API", 1); 2657 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1184 2658
1185 coroapi.schedule = api_schedule; 2659 coroapi.schedule = api_schedule;
1186 coroapi.cede = api_cede; 2660 coroapi.cede = api_cede;
2661 coroapi.cede_notself = api_cede_notself;
1187 coroapi.ready = api_ready; 2662 coroapi.ready = api_ready;
1188 coroapi.is_ready = api_is_ready; 2663 coroapi.is_ready = api_is_ready;
1189 coroapi.nready = &coro_nready; 2664 coroapi.nready = coro_nready;
1190 coroapi.current = coro_current; 2665 coroapi.current = coro_current;
1191 2666
1192 GCoroAPI = &coroapi; 2667 /*GCoroAPI = &coroapi;*/
1193 sv_setiv (sv, (IV)&coroapi); 2668 sv_setiv (sv, (IV)&coroapi);
1194 SvREADONLY_on (sv); 2669 SvREADONLY_on (sv);
1195 } 2670 }
1196} 2671}
1197 2672
2673void
2674schedule (...)
2675 CODE:
2676 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2677
2678void
2679cede (...)
2680 CODE:
2681 CORO_EXECUTE_SLF_XS (slf_init_cede);
2682
2683void
2684cede_notself (...)
2685 CODE:
2686 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2687
2688void
2689_set_current (SV *current)
2690 PROTOTYPE: $
2691 CODE:
2692 SvREFCNT_dec (SvRV (coro_current));
2693 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2694
2695void
2696_set_readyhook (SV *hook)
2697 PROTOTYPE: $
2698 CODE:
2699 SvREFCNT_dec (coro_readyhook);
2700 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2701
1198int 2702int
1199prio (Coro::State coro, int newprio = 0) 2703prio (Coro::State coro, int newprio = 0)
2704 PROTOTYPE: $;$
1200 ALIAS: 2705 ALIAS:
1201 nice = 1 2706 nice = 1
1202 CODE: 2707 CODE:
1203{ 2708{
1204 RETVAL = coro->prio; 2709 RETVAL = coro->prio;
1205 2710
1206 if (items > 1) 2711 if (items > 1)
1207 { 2712 {
1208 if (ix) 2713 if (ix)
1209 newprio += coro->prio; 2714 newprio = coro->prio - newprio;
1210 2715
1211 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2716 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2717 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213 2718
1214 coro->prio = newprio; 2719 coro->prio = newprio;
1215 } 2720 }
1216} 2721}
2722 OUTPUT:
2723 RETVAL
1217 2724
1218SV * 2725SV *
1219ready (SV *self) 2726ready (SV *self)
1220 PROTOTYPE: $ 2727 PROTOTYPE: $
1221 CODE: 2728 CODE:
1222 RETVAL = boolSV (api_ready (self)); 2729 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: 2730 OUTPUT:
1232 RETVAL 2731 RETVAL
1233 2732
1234int 2733int
1235nready (...) 2734nready (...)
… …
1237 CODE: 2736 CODE:
1238 RETVAL = coro_nready; 2737 RETVAL = coro_nready;
1239 OUTPUT: 2738 OUTPUT:
1240 RETVAL 2739 RETVAL
1241 2740
2741# for async_pool speedup
2742void
2743_pool_1 (SV *cb)
2744 CODE:
2745{
2746 HV *hv = (HV *)SvRV (coro_current);
2747 struct coro *coro = SvSTATE_hv ((SV *)hv);
2748 AV *defav = GvAV (PL_defgv);
2749 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2750 AV *invoke_av;
2751 int i, len;
2752
2753 if (!invoke)
2754 {
2755 SV *old = PL_diehook;
2756 PL_diehook = 0;
2757 SvREFCNT_dec (old);
2758 croak ("\3async_pool terminate\2\n");
2759 }
2760
2761 SvREFCNT_dec (coro->saved_deffh);
2762 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2763
2764 hv_store (hv, "desc", sizeof ("desc") - 1,
2765 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2766
2767 invoke_av = (AV *)SvRV (invoke);
2768 len = av_len (invoke_av);
2769
2770 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2771
2772 if (len > 0)
2773 {
2774 av_fill (defav, len - 1);
2775 for (i = 0; i < len; ++i)
2776 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2777 }
2778}
2779
2780void
2781_pool_2 (SV *cb)
2782 CODE:
2783{
2784 HV *hv = (HV *)SvRV (coro_current);
2785 struct coro *coro = SvSTATE_hv ((SV *)hv);
2786
2787 sv_setsv (cb, &PL_sv_undef);
2788
2789 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2790 coro->saved_deffh = 0;
2791
2792 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2793 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2794 {
2795 SV *old = PL_diehook;
2796 PL_diehook = 0;
2797 SvREFCNT_dec (old);
2798 croak ("\3async_pool terminate\2\n");
2799 }
2800
2801 av_clear (GvAV (PL_defgv));
2802 hv_store (hv, "desc", sizeof ("desc") - 1,
2803 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2804
2805 coro->prio = 0;
2806
2807 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2808 api_trace (aTHX_ coro_current, 0);
2809
2810 av_push (av_async_pool, newSVsv (coro_current));
2811}
2812
2813
2814MODULE = Coro::State PACKAGE = PerlIO::cede
2815
2816BOOT:
2817 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2818
2819
1242MODULE = Coro::State PACKAGE = Coro::AIO 2820MODULE = Coro::State PACKAGE = Coro::Semaphore
1243 2821
1244SV * 2822SV *
1245_get_state () 2823new (SV *klass, SV *count = 0)
1246 CODE: 2824 CODE:
1247{ 2825 RETVAL = sv_bless (
1248 struct { 2826 coro_semaphore_new (count && SvOK (count) ? SvIV (count) : 1),
1249 int errorno; 2827 GvSTASH (CvGV (cv))
1250 int laststype; 2828 );
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: 2829 OUTPUT:
1263 RETVAL 2830 RETVAL
1264 2831
2832# helper for Coro::Channel
2833SV *
2834_alloc (int count)
2835 CODE:
2836 RETVAL = coro_semaphore_new (count);
2837 OUTPUT:
2838 RETVAL
2839
2840SV *
2841count (SV *self)
2842 CODE:
2843 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2844 OUTPUT:
2845 RETVAL
2846
1265void 2847void
1266_set_state (char *data_) 2848up (SV *self, int adjust = 1)
1267 PROTOTYPE: $ 2849 ALIAS:
2850 adjust = 1
2851 CODE:
2852 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2853
2854void
2855down (SV *self)
2856 ALIAS:
2857 Coro::Signal::wait = 0
2858 CODE:
2859 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2860
2861void
2862wait (SV *self)
2863 CODE:
2864 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2865
2866void
2867try (SV *self)
2868 PPCODE:
2869{
2870 AV *av = (AV *)SvRV (self);
2871 SV *count_sv = AvARRAY (av)[0];
2872 IV count = SvIVX (count_sv);
2873
2874 if (count > 0)
2875 {
2876 --count;
2877 SvIVX (count_sv) = count;
2878 XSRETURN_YES;
2879 }
2880 else
2881 XSRETURN_NO;
2882}
2883
2884void
2885waiters (SV *self)
2886 PPCODE:
2887{
2888 AV *av = (AV *)SvRV (self);
2889 int wcount = AvFILLp (av) + 1 - 1;
2890
2891 if (GIMME_V == G_SCALAR)
2892 XPUSHs (sv_2mortal (newSViv (wcount)));
2893 else
2894 {
2895 int i;
2896 EXTEND (SP, wcount);
2897 for (i = 1; i <= wcount; ++i)
2898 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2899 }
2900}
2901
2902MODULE = Coro::State PACKAGE = Coro::Signal
2903
2904SV *
2905new (SV *klass)
1268 CODE: 2906 CODE:
1269{ 2907 RETVAL = sv_bless (
1270 struct { 2908 coro_semaphore_new (0),
1271 int errorno; 2909 GvSTASH (CvGV (cv))
1272 int laststype; 2910 );
1273 int laststatval; 2911 OUTPUT:
1274 Stat_t statcache; 2912 RETVAL
1275 } *data = (void *)data_;
1276 2913
1277 errno = data->errorno; 2914void
1278 PL_laststype = data->laststype; 2915broadcast (SV *self, int adjust = 1)
1279 PL_laststatval = data->laststatval; 2916 CODE:
1280 PL_statcache = data->statcache; 2917{
2918 AV *av = (AV *)SvRV (self);
2919 SvIVX (AvARRAY (av)[0]) = 0; /* not necessary, but gives me fuzzy warm feelings */
2920 coro_semaphore_adjust (aTHX_ av, AvFILLp (av) + 1 - 1);
2921 SvIVX (AvARRAY (av)[0]) = 0; /* necessary */
1281} 2922}
2923
2924
2925MODULE = Coro::State PACKAGE = Coro::AnyEvent
2926
2927BOOT:
2928 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2929
2930void
2931_schedule (...)
2932 CODE:
2933{
2934 static int incede;
2935
2936 api_cede_notself (aTHX);
2937
2938 ++incede;
2939 while (coro_nready >= incede && api_cede (aTHX))
2940 ;
2941
2942 sv_setsv (sv_activity, &PL_sv_undef);
2943 if (coro_nready >= incede)
2944 {
2945 PUSHMARK (SP);
2946 PUTBACK;
2947 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2948 }
2949
2950 --incede;
2951}
2952
2953
2954MODULE = Coro::State PACKAGE = Coro::AIO
2955
2956void
2957_register (char *target, char *proto, SV *req)
2958 CODE:
2959{
2960 HV *st;
2961 GV *gvp;
2962 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2963 /* newXSproto doesn't return the CV on 5.8 */
2964 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2965 sv_setpv ((SV *)slf_cv, proto);
2966 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2967}
2968

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