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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.331 by root, Thu Nov 27 12:00:59 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
77#define dSTACKLEVEL int stacklevel 131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
79 137
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
81 139
82#if __GNUC__ >= 3 140#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
84#else 144#else
85# define attribute(x) 145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
86#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
87 152
88#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
89 154
90#include "CoroAPI.h" 155#include "CoroAPI.h"
91 156#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 157
94#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 159# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 161# endif
162#endif
102 163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
107 199
108static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
110 202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
111/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 213typedef struct coro_cctx
214{
113 struct coro_cctx *next; 215 struct coro_cctx *next;
114 216
115 /* the stack */ 217 /* the stack */
116 void *sptr; 218 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
118 220
119 /* cpu state */ 221 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 224 JMPENV *top_env;
122 coro_context cctx; 225 coro_context cctx;
123 226
124 int inuse; 227 U32 gen;
125
126#if USE_VALGRIND 228#if CORO_USE_VALGRIND
127 int valgrind_id; 229 int valgrind_id;
128#endif 230#endif
231 unsigned char flags;
129} coro_cctx; 232} coro_cctx;
130 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
131enum { 238enum {
132 CF_RUNNING, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 243};
135 244
136/* this is a structure representing a perl-level coroutine */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
137struct coro { 246typedef struct
138 /* the c coroutine allocated to this perl coroutine, if any */ 247{
139 coro_cctx *cctx; 248 SV *defsv;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143 int refcnt;
144 int flags;
145
146 /* optionally saved, might be zero */
147 AV *defav; 249 AV *defav;
148 SV *defsv;
149 SV *errsv; 250 SV *errsv;
150 251 SV *irsgv;
252 HV *hinthv;
151#define VAR(name,type) type name; 253#define VAR(name,type) type name;
152# include "state.h" 254# include "state.h"
153#undef VAR 255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
261struct coro {
262 /* the C coroutine allocated to this perl coroutine, if any */
263 coro_cctx *cctx;
264
265 /* state data */
266 struct CoroSLF slf_frame; /* saved slf frame */
267 AV *mainstack;
268 perl_slots *slot; /* basically the saved sp */
269
270 CV *startcv; /* the CV to execute */
271 AV *args; /* data associated with this coroutine (initial args) */
272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
154 279
155 /* coro process data */ 280 /* coro process data */
156 int prio; 281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
157}; 292};
158 293
159typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
161 296
162static AV * 297/* the following variables are effectively part of the perl context */
163coro_clone_padlist (CV *cv) 298/* and get copied between struct coro and these variables */
164{ 299/* the mainr easonw e don't support windows process emulation */
165 AV *padlist = CvPADLIST (cv); 300static struct CoroSLF slf_frame; /* the current slf frame */
166 AV *newpadlist, *newpad;
167
168 newpadlist = newAV ();
169 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176 --AvFILLp (padlist);
177
178 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
179 av_store (newpadlist, 1, (SV *)newpad);
180
181 return newpadlist;
182}
183
184static void
185free_padlist (AV *padlist)
186{
187 /* may be during global destruction */
188 if (SvREFCNT (padlist))
189 {
190 I32 i = AvFILLp (padlist);
191 while (i >= 0)
192 {
193 SV **svp = av_fetch (padlist, i--, FALSE);
194 if (svp)
195 {
196 SV *sv;
197 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
198 SvREFCNT_dec (sv);
199
200 SvREFCNT_dec (*svp);
201 }
202 }
203
204 SvREFCNT_dec ((SV*)padlist);
205 }
206}
207
208static int
209coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
210{
211 AV *padlist;
212 AV *av = (AV *)mg->mg_obj;
213
214 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist);
217
218 SvREFCNT_dec (av);
219
220 return 0;
221}
222
223#define PERL_MAGIC_coro PERL_MAGIC_ext
224
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226
227#define CORO_MAGIC(cv) \
228 SvMAGIC (cv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230 ? SvMAGIC (cv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
232 : 0
233
234/* the next two functions merely cache the padlists */
235static void
236get_padlist (CV *cv)
237{
238 MAGIC *mg = CORO_MAGIC (cv);
239 AV *av;
240
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else
244 {
245#if 0
246 /* this is probably cleaner, but also slower? */
247 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp);
251#else
252 CvPADLIST (cv) = coro_clone_padlist (cv);
253#endif
254 }
255}
256
257static void
258put_padlist (CV *cv)
259{
260 MAGIC *mg = CORO_MAGIC (cv);
261 AV *av;
262
263 if (!mg)
264 {
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270
271 av = (AV *)mg->mg_obj;
272
273 if (AvFILLp (av) >= AvMAX (av))
274 av_extend (av, AvMAX (av) + 1);
275
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277}
278
279#define SB do {
280#define SE } while (0)
281
282#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287static void
288load_state(Coro__State c)
289{
290#define VAR(name,type) PL_ ## name = c->name;
291# include "state.h"
292#undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297
298 {
299 dSP;
300 CV *cv;
301
302 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs))
304 {
305 put_padlist (cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs;
308 }
309
310 PUTBACK;
311 }
312}
313
314static void
315save_state(Coro__State c, int flags)
316{
317 {
318 dSP;
319 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack;
321 PERL_SI *top_si = PL_curstackinfo;
322
323 /*
324 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :(
326 */
327
328 PUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */
330 for (;;)
331 {
332 while (cxix >= 0)
333 {
334 PERL_CONTEXT *cx = &ccstk[cxix--];
335
336 if (CxTYPE(cx) == CXt_SUB)
337 {
338 CV *cv = cx->blk_sub.cv;
339
340 if (CvDEPTH (cv))
341 {
342 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346 PUSHs ((SV *)cv);
347
348 CvDEPTH (cv) = 0;
349 get_padlist (cv);
350 }
351 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 }
361
362 if (top_si->si_type == PERLSI_MAIN)
363 break;
364
365 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix;
368 }
369
370 PUTBACK;
371 }
372
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
376
377#define VAR(name,type)c->name = PL_ ## name;
378# include "state.h"
379#undef VAR
380}
381
382/*
383 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace.
387 */
388static void
389coro_init_stacks ()
390{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
392 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395
396 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399
400 New(50,PL_tmps_stack,96,SV*);
401 PL_tmps_floor = -1;
402 PL_tmps_ix = -1;
403 PL_tmps_max = 96;
404
405 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16;
408
409#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET;
411#endif
412
413 New(54,PL_scopestack,16,I32);
414 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16;
416
417 New(54,PL_savestack,96,ANY);
418 PL_savestack_ix = 0;
419 PL_savestack_max = 96;
420
421#if !PERL_VERSION_ATLEAST (5,9,0)
422 New(54,PL_retstack,8,OP*);
423 PL_retstack_ix = 0;
424 PL_retstack_max = 8;
425#endif
426}
427
428/*
429 * destroy the stacks, the callchain etc...
430 */
431static void
432coro_destroy_stacks ()
433{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next;
447
448 while (PL_curstackinfo)
449 {
450 PERL_SI *p = PL_curstackinfo->si_prev;
451
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463
464 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p;
467 }
468
469 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack);
471 Safefree (PL_scopestack);
472 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0)
474 Safefree (PL_retstack);
475#endif
476}
477
478static void
479setup_coro (struct coro *coro)
480{
481 /*
482 * emulate part of the perl startup here.
483 */
484
485 coro_init_stacks ();
486
487 PL_curcop = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0;
490
491 {
492 dSP;
493 LOGOP myop;
494
495 /* I have no idea why this is needed, but it is */
496 PUSHMARK (SP);
497
498 SvREFCNT_dec (GvAV (PL_defgv));
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID;
504
505 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 }
515}
516
517static void
518free_coro_mortal ()
519{
520 if (coro_mortal)
521 {
522 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0;
524 }
525}
526
527static void NOINLINE
528prepare_cctx (coro_cctx *cctx)
529{
530 dSP;
531 LOGOP myop;
532
533 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538
539 PUSHMARK (SP);
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN;
544}
545
546static void
547coro_run (void *arg)
548{
549 /* coro_run is the alternative epilogue of transfer() */
550 UNLOCK;
551
552 /*
553 * this is a _very_ stripped down perl interpreter ;)
554 */
555 PL_top_env = &PL_start_env;
556
557 /* inject call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg);
559
560 /* somebody will hit me for both perl_run and PL_restartop */
561 perl_run (PL_curinterp);
562
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564 abort ();
565}
566
567static coro_cctx *
568cctx_new ()
569{
570 coro_cctx *cctx;
571
572 ++cctx_count;
573
574 New (0, cctx, 1, coro_cctx);
575
576#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581
582 if (cctx->sptr == (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 }
587
588# if STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
590# endif
591
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr)
598 {
599 perror ("FATAL: unable to malloc stack for coroutine");
600 _exit (EXIT_FAILURE);
601 }
602
603#endif
604
605#if USE_VALGRIND
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613
614 return cctx;
615}
616
617static void
618cctx_free (coro_cctx *cctx)
619{
620 if (!cctx)
621 return;
622
623 --cctx_count;
624
625#if USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif
628
629#if HAVE_MMAP
630 munmap (cctx->sptr, cctx->ssize);
631#else
632 Safefree (cctx->sptr);
633#endif
634
635 Safefree (cctx);
636}
637
638static coro_cctx *
639cctx_get ()
640{
641 coro_cctx *cctx;
642
643 if (cctx_first)
644 {
645 --cctx_idle;
646 cctx = cctx_first;
647 cctx_first = cctx->next;
648 }
649 else
650 {
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 }
654
655 return cctx;
656}
657
658static void
659cctx_put (coro_cctx *cctx)
660{
661 ++cctx_idle;
662 cctx->next = cctx_first;
663 cctx_first = cctx;
664}
665
666/* never call directly, always through the coro_state_transfer global variable */
667static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags)
669{
670 dSTACKLEVEL;
671
672 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL)
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
675 else if (prev != next)
676 {
677 coro_cctx *prev__cctx;
678
679 if (!prev->cctx)
680 {
681 /* create a new empty context */
682 Newz (0, prev->cctx, 1, coro_cctx);
683 prev->cctx->inuse = 1;
684 prev->flags |= CF_RUNNING;
685 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692
693 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING;
695
696 LOCK;
697
698 if (next->mainstack)
699 {
700 /* coroutine already started */
701 SAVE (prev, flags);
702 LOAD (next);
703 }
704 else
705 {
706 /* need to start coroutine */
707 /* first get rid of the old state */
708 SAVE (prev, -1);
709 /* setup coroutine call */
710 setup_coro (next);
711 /* need a new stack */
712 assert (!next->stack);
713 }
714
715 prev__cctx = prev->cctx;
716
717 /* possibly "free" the cctx */
718 if (prev__cctx->idle_sp == STACKLEVEL)
719 {
720 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721 assert (PL_top_env == prev__cctx->top_env);
722
723 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 }
726
727 if (!next->cctx)
728 next->cctx = cctx_get ();
729
730 if (prev__cctx != next->cctx)
731 {
732 assert ( prev__cctx->inuse);
733 assert (!next->cctx->inuse);
734
735 prev__cctx->inuse = 0;
736 next->cctx->inuse = 1;
737
738 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 }
742
743 free_coro_mortal ();
744
745 UNLOCK;
746 }
747}
748
749struct transfer_args
750{
751 struct coro *prev, *next;
752 int flags;
753};
754
755#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
756
757static void
758coro_state_destroy (struct coro *coro)
759{
760 if (coro->refcnt--)
761 return;
762
763 if (coro->flags & CF_RUNNING)
764 croak ("FATAL: tried to destroy currently running coroutine");
765
766 if (coro->mainstack && coro->mainstack != main_mainstack)
767 {
768 struct coro temp;
769
770 SAVE ((&temp), TRANSFER_SAVE_ALL);
771 LOAD (coro);
772
773 coro_destroy_stacks ();
774
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */
776
777 coro->mainstack = 0;
778 }
779
780 cctx_free (coro->cctx);
781 SvREFCNT_dec (coro->args);
782 Safefree (coro);
783}
784
785static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
787{
788 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0;
790
791 coro_state_destroy (coro);
792
793 return 0;
794}
795
796static int
797coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
798{
799 struct coro *coro = (struct coro *)mg->mg_ptr;
800
801 ++coro->refcnt;
802
803 return 0;
804}
805
806static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0,
808 coro_state_clear,
809 0,
810#ifdef MGf_DUP
811 coro_state_dup,
812#else
813# define MGf_DUP 0
814#endif
815};
816
817static struct coro *
818SvSTATE (SV *coro)
819{
820 HV *stash;
821 MAGIC *mg;
822
823 if (SvROK (coro))
824 coro = SvRV (coro);
825
826 stash = SvSTASH (coro);
827 if (stash != coro_stash && stash != coro_state_stash)
828 {
829 /* very slow, but rare, check */
830 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831 croak ("Coro::State object required");
832 }
833
834 mg = SvMAGIC (coro);
835 assert (mg->mg_type == PERL_MAGIC_ext);
836 return (struct coro *)mg->mg_ptr;
837}
838
839static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
841{
842 ta->prev = SvSTATE (prev);
843 ta->next = SvSTATE (next);
844 ta->flags = flags;
845}
846
847static void
848api_transfer (SV *prev, SV *next, int flags)
849{
850 dTHX;
851 struct transfer_args ta;
852
853 prepare_transfer (&ta, prev, next, flags);
854 TRANSFER (ta);
855}
856 301
857/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
858 303
859#define PRIO_MAX 3 304#define PRIO_MAX 3
860#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
862#define PRIO_LOW -1 307#define PRIO_LOW -1
863#define PRIO_IDLE -3 308#define PRIO_IDLE -3
864#define PRIO_MIN -4 309#define PRIO_MIN -4
865 310
866/* for Coro.pm */ 311/* for Coro.pm */
867static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
868static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
869static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
870 318
871static void 319/** lowlevel stuff **********************************************************/
872coro_enq (SV *coro_sv)
873{
874 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875 coro_nready++;
876}
877 320
878static SV * 321static SV *
879coro_deq (int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
880{ 323{
881 int prio = PRIO_MAX - PRIO_MIN; 324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
882 330
883 min_prio -= PRIO_MIN; 331static AV *
884 if (min_prio < 0) 332coro_get_av (pTHX_ const char *name, int create)
885 min_prio = 0; 333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
886 340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360static AV *
361coro_derive_padlist (pTHX_ CV *cv)
362{
363 AV *padlist = CvPADLIST (cv);
364 AV *newpadlist, *newpad;
365
366 newpadlist = newAV ();
367 AvREAL_off (newpadlist);
368#if PERL_VERSION_ATLEAST (5,10,0)
369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
370#else
371 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
372#endif
373 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
374 --AvFILLp (padlist);
375
376 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
377 av_store (newpadlist, 1, (SV *)newpad);
378
379 return newpadlist;
380}
381
382static void
383free_padlist (pTHX_ AV *padlist)
384{
385 /* may be during global destruction */
386 if (!IN_DESTRUCT)
387 {
388 I32 i = AvFILLp (padlist);
389
390 while (i >= 0)
391 {
392 /* we try to be extra-careful here */
393 AV *av = (AV *)AvARRAY (padlist)[i--];
394
395 I32 i = AvFILLp (av);
396
397 while (i >= 0)
398 SvREFCNT_dec (AvARRAY (av)[i--]);
399
400 AvFILLp (av) = -1;
401 SvREFCNT_dec (av);
402 }
403
404 AvFILLp (padlist) = -1;
405 SvREFCNT_dec ((SV*)padlist);
406 }
407}
408
409static int
410coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
411{
412 AV *padlist;
413 AV *av = (AV *)mg->mg_obj;
414
415 /* casting is fun. */
416 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
417 free_padlist (aTHX_ padlist);
418
419 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
420
421 return 0;
422}
423
424#define CORO_MAGIC_type_cv 26
425#define CORO_MAGIC_type_state PERL_MAGIC_ext
426
427static MGVTBL coro_cv_vtbl = {
428 0, 0, 0, 0,
429 coro_cv_free
430};
431
432#define CORO_MAGIC_NN(sv, type) \
433 (expect_true (SvMAGIC (sv)->mg_type == type) \
434 ? SvMAGIC (sv) \
435 : mg_find (sv, type))
436
437#define CORO_MAGIC(sv, type) \
438 (expect_true (SvMAGIC (sv)) \
439 ? CORO_MAGIC_NN (sv, type) \
440 : 0)
441
442#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
443#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
444
445INLINE struct coro *
446SvSTATE_ (pTHX_ SV *coro)
447{
448 HV *stash;
449 MAGIC *mg;
450
451 if (SvROK (coro))
452 coro = SvRV (coro);
453
454 if (expect_false (SvTYPE (coro) != SVt_PVHV))
455 croak ("Coro::State object required");
456
457 stash = SvSTASH (coro);
458 if (expect_false (stash != coro_stash && stash != coro_state_stash))
459 {
460 /* very slow, but rare, check */
461 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
462 croak ("Coro::State object required");
463 }
464
465 mg = CORO_MAGIC_state (coro);
466 return (struct coro *)mg->mg_ptr;
467}
468
469#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
470
471/* faster than SvSTATE, but expects a coroutine hv */
472#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
473#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
474
475/* the next two functions merely cache the padlists */
476static void
477get_padlist (pTHX_ CV *cv)
478{
479 MAGIC *mg = CORO_MAGIC_cv (cv);
480 AV *av;
481
482 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
483 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
484 else
485 {
486#if CORO_PREFER_PERL_FUNCTIONS
487 /* this is probably cleaner? but also slower! */
488 /* in practise, it seems to be less stable */
489 CV *cp = Perl_cv_clone (aTHX_ cv);
490 CvPADLIST (cv) = CvPADLIST (cp);
491 CvPADLIST (cp) = 0;
492 SvREFCNT_dec (cp);
493#else
494 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
495#endif
496 }
497}
498
499static void
500put_padlist (pTHX_ CV *cv)
501{
502 MAGIC *mg = CORO_MAGIC_cv (cv);
503 AV *av;
504
505 if (expect_false (!mg))
506 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
507
508 av = (AV *)mg->mg_obj;
509
510 if (expect_false (AvFILLp (av) >= AvMAX (av)))
511 av_extend (av, AvFILLp (av) + 1);
512
513 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
514}
515
516/** load & save, init *******************************************************/
517
518static void
519load_perl (pTHX_ Coro__State c)
520{
521 perl_slots *slot = c->slot;
522 c->slot = 0;
523
524 PL_mainstack = c->mainstack;
525
526 GvSV (PL_defgv) = slot->defsv;
527 GvAV (PL_defgv) = slot->defav;
528 GvSV (PL_errgv) = slot->errsv;
529 GvSV (irsgv) = slot->irsgv;
530 GvHV (PL_hintgv) = slot->hinthv;
531
532 #define VAR(name,type) PL_ ## name = slot->name;
533 # include "state.h"
534 #undef VAR
535
536 {
537 dSP;
538
539 CV *cv;
540
541 /* now do the ugly restore mess */
542 while (expect_true (cv = (CV *)POPs))
543 {
544 put_padlist (aTHX_ cv); /* mark this padlist as available */
545 CvDEPTH (cv) = PTR2IV (POPs);
546 CvPADLIST (cv) = (AV *)POPs;
547 }
548
549 PUTBACK;
550 }
551
552 slf_frame = c->slf_frame;
553 CORO_THROW = c->except;
554}
555
556static void
557save_perl (pTHX_ Coro__State c)
558{
559 c->except = CORO_THROW;
560 c->slf_frame = slf_frame;
561
562 {
563 dSP;
564 I32 cxix = cxstack_ix;
565 PERL_CONTEXT *ccstk = cxstack;
566 PERL_SI *top_si = PL_curstackinfo;
567
568 /*
569 * the worst thing you can imagine happens first - we have to save
570 * (and reinitialize) all cv's in the whole callchain :(
571 */
572
573 XPUSHs (Nullsv);
574 /* this loop was inspired by pp_caller */
575 for (;;)
576 {
577 while (expect_true (cxix >= 0))
578 {
579 PERL_CONTEXT *cx = &ccstk[cxix--];
580
581 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
582 {
583 CV *cv = cx->blk_sub.cv;
584
585 if (expect_true (CvDEPTH (cv)))
586 {
587 EXTEND (SP, 3);
588 PUSHs ((SV *)CvPADLIST (cv));
589 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
590 PUSHs ((SV *)cv);
591
592 CvDEPTH (cv) = 0;
593 get_padlist (aTHX_ cv);
594 }
595 }
596 }
597
598 if (expect_true (top_si->si_type == PERLSI_MAIN))
599 break;
600
601 top_si = top_si->si_prev;
602 ccstk = top_si->si_cxstack;
603 cxix = top_si->si_cxix;
604 }
605
606 PUTBACK;
607 }
608
609 /* allocate some space on the context stack for our purposes */
610 /* we manually unroll here, as usually 2 slots is enough */
611 if (SLOT_COUNT >= 1) CXINC;
612 if (SLOT_COUNT >= 2) CXINC;
613 if (SLOT_COUNT >= 3) CXINC;
614 {
615 int i;
616 for (i = 3; i < SLOT_COUNT; ++i)
617 CXINC;
618 }
619 cxstack_ix -= SLOT_COUNT; /* undo allocation */
620
621 c->mainstack = PL_mainstack;
622
623 {
624 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
625
626 slot->defav = GvAV (PL_defgv);
627 slot->defsv = DEFSV;
628 slot->errsv = ERRSV;
629 slot->irsgv = GvSV (irsgv);
630 slot->hinthv = GvHV (PL_hintgv);
631
632 #define VAR(name,type) slot->name = PL_ ## name;
633 # include "state.h"
634 #undef VAR
635 }
636}
637
638/*
639 * allocate various perl stacks. This is almost an exact copy
640 * of perl.c:init_stacks, except that it uses less memory
641 * on the (sometimes correct) assumption that coroutines do
642 * not usually need a lot of stackspace.
643 */
644#if CORO_PREFER_PERL_FUNCTIONS
645# define coro_init_stacks(thx) init_stacks ()
646#else
647static void
648coro_init_stacks (pTHX)
649{
650 PL_curstackinfo = new_stackinfo(32, 8);
651 PL_curstackinfo->si_type = PERLSI_MAIN;
652 PL_curstack = PL_curstackinfo->si_stack;
653 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
654
655 PL_stack_base = AvARRAY(PL_curstack);
656 PL_stack_sp = PL_stack_base;
657 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
658
659 New(50,PL_tmps_stack,32,SV*);
660 PL_tmps_floor = -1;
661 PL_tmps_ix = -1;
662 PL_tmps_max = 32;
663
664 New(54,PL_markstack,16,I32);
665 PL_markstack_ptr = PL_markstack;
666 PL_markstack_max = PL_markstack + 16;
667
668#ifdef SET_MARK_OFFSET
669 SET_MARK_OFFSET;
670#endif
671
672 New(54,PL_scopestack,8,I32);
673 PL_scopestack_ix = 0;
674 PL_scopestack_max = 8;
675
676 New(54,PL_savestack,24,ANY);
677 PL_savestack_ix = 0;
678 PL_savestack_max = 24;
679
680#if !PERL_VERSION_ATLEAST (5,10,0)
681 New(54,PL_retstack,4,OP*);
682 PL_retstack_ix = 0;
683 PL_retstack_max = 4;
684#endif
685}
686#endif
687
688/*
689 * destroy the stacks, the callchain etc...
690 */
691static void
692coro_destruct_stacks (pTHX)
693{
694 while (PL_curstackinfo->si_next)
695 PL_curstackinfo = PL_curstackinfo->si_next;
696
697 while (PL_curstackinfo)
698 {
699 PERL_SI *p = PL_curstackinfo->si_prev;
700
701 if (!IN_DESTRUCT)
702 SvREFCNT_dec (PL_curstackinfo->si_stack);
703
704 Safefree (PL_curstackinfo->si_cxstack);
705 Safefree (PL_curstackinfo);
706 PL_curstackinfo = p;
707 }
708
709 Safefree (PL_tmps_stack);
710 Safefree (PL_markstack);
711 Safefree (PL_scopestack);
712 Safefree (PL_savestack);
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 Safefree (PL_retstack);
715#endif
716}
717
718#define CORO_RSS \
719 rss += sizeof (SYM (curstackinfo)); \
720 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
721 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
722 rss += SYM (tmps_max) * sizeof (SV *); \
723 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
724 rss += SYM (scopestack_max) * sizeof (I32); \
725 rss += SYM (savestack_max) * sizeof (ANY);
726
727static size_t
728coro_rss (pTHX_ struct coro *coro)
729{
730 size_t rss = sizeof (*coro);
731
732 if (coro->mainstack)
733 {
734 if (coro->flags & CF_RUNNING)
735 {
736 #define SYM(sym) PL_ ## sym
737 CORO_RSS;
738 #undef SYM
739 }
740 else
741 {
742 #define SYM(sym) coro->slot->sym
743 CORO_RSS;
744 #undef SYM
745 }
746 }
747
748 return rss;
749}
750
751/** coroutine stack handling ************************************************/
752
753static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
754static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
755static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
756
757/* apparently < 5.8.8 */
758#ifndef MgPV_nolen_const
759#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
760 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
761 (const char*)(mg)->mg_ptr)
762#endif
763
764/*
765 * This overrides the default magic get method of %SIG elements.
766 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
767 * and instead of tryign to save and restore the hash elements, we just provide
768 * readback here.
769 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
770 * not expecting this to actually change the hook. This is a potential problem
771 * when a schedule happens then, but we ignore this.
772 */
773static int
774coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
775{
776 const char *s = MgPV_nolen_const (mg);
777
778 if (*s == '_')
779 {
780 SV **svp = 0;
781
782 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
783 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
784
785 if (svp)
786 {
787 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = 0;
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
817}
818
819static int
820coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
821{
822 const char *s = MgPV_nolen_const (mg);
823
824 if (*s == '_')
825 {
826 SV **svp = 0;
827
828 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
829 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
830
831 if (svp)
832 {
833 SV *old = *svp;
834 *svp = newSVsv (sv);
835 SvREFCNT_dec (old);
836 return 0;
837 }
838 }
839
840 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
841}
842
843static void
844prepare_nop (pTHX_ struct coro_transfer_args *ta)
845{
846 /* kind of mega-hacky, but works */
847 ta->next = ta->prev = (struct coro *)ta;
848}
849
850static int
851slf_check_nop (pTHX_ struct CoroSLF *frame)
852{
853 return 0;
854}
855
856static int
857slf_check_repeat (pTHX_ struct CoroSLF *frame)
858{
859 return 1;
860}
861
862static UNOP coro_setup_op;
863
864static void NOINLINE /* noinline to keep it out of the transfer fast path */
865coro_setup (pTHX_ struct coro *coro)
866{
867 /*
868 * emulate part of the perl startup here.
869 */
870 coro_init_stacks (aTHX);
871
872 PL_runops = RUNOPS_DEFAULT;
873 PL_curcop = &PL_compiling;
874 PL_in_eval = EVAL_NULL;
875 PL_comppad = 0;
876 PL_comppad_name = 0;
877 PL_comppad_name_fill = 0;
878 PL_comppad_name_floor = 0;
879 PL_curpm = 0;
880 PL_curpad = 0;
881 PL_localizing = 0;
882 PL_dirty = 0;
883 PL_restartop = 0;
884#if PERL_VERSION_ATLEAST (5,10,0)
885 PL_parser = 0;
886#endif
887 PL_hints = 0;
888
889 /* recreate the die/warn hooks */
890 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
891 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
892
893 GvSV (PL_defgv) = newSV (0);
894 GvAV (PL_defgv) = coro->args; coro->args = 0;
895 GvSV (PL_errgv) = newSV (0);
896 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
897 GvHV (PL_hintgv) = 0;
898 PL_rs = newSVsv (GvSV (irsgv));
899 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
900
901 {
902 dSP;
903 UNOP myop;
904
905 Zero (&myop, 1, UNOP);
906 myop.op_next = Nullop;
907 myop.op_type = OP_ENTERSUB;
908 myop.op_flags = OPf_WANT_VOID;
909
910 PUSHMARK (SP);
911 PUSHs ((SV *)coro->startcv);
912 PUTBACK;
913 PL_op = (OP *)&myop;
914 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
915 }
916
917 /* this newly created coroutine might be run on an existing cctx which most
918 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
919 */
920 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
921 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
922
923 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
924 coro_setup_op.op_next = PL_op;
925 coro_setup_op.op_type = OP_ENTERSUB;
926 coro_setup_op.op_ppaddr = pp_slf;
927 /* no flags etc. required, as an init function won't be called */
928
929 PL_op = (OP *)&coro_setup_op;
930
931 /* copy throw, in case it was set before coro_setup */
932 CORO_THROW = coro->except;
933}
934
935static void
936coro_destruct (pTHX_ struct coro *coro)
937{
938 if (!IN_DESTRUCT)
939 {
940 /* restore all saved variables and stuff */
941 LEAVE_SCOPE (0);
942 assert (PL_tmps_floor == -1);
943
944 /* free all temporaries */
945 FREETMPS;
946 assert (PL_tmps_ix == -1);
947
948 /* unwind all extra stacks */
949 POPSTACK_TO (PL_mainstack);
950
951 /* unwind main stack */
952 dounwind (-1);
953 }
954
955 SvREFCNT_dec (GvSV (PL_defgv));
956 SvREFCNT_dec (GvAV (PL_defgv));
957 SvREFCNT_dec (GvSV (PL_errgv));
958 SvREFCNT_dec (PL_defoutgv);
959 SvREFCNT_dec (PL_rs);
960 SvREFCNT_dec (GvSV (irsgv));
961 SvREFCNT_dec (GvHV (PL_hintgv));
962
963 SvREFCNT_dec (PL_diehook);
964 SvREFCNT_dec (PL_warnhook);
965
966 SvREFCNT_dec (coro->saved_deffh);
967 SvREFCNT_dec (coro->rouse_cb);
968 SvREFCNT_dec (coro->invoke_cb);
969 SvREFCNT_dec (coro->invoke_av);
970
971 coro_destruct_stacks (aTHX);
972}
973
974INLINE void
975free_coro_mortal (pTHX)
976{
977 if (expect_true (coro_mortal))
978 {
979 SvREFCNT_dec (coro_mortal);
980 coro_mortal = 0;
981 }
982}
983
984static int
985runops_trace (pTHX)
986{
987 COP *oldcop = 0;
988 int oldcxix = -2;
989
990 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
991 {
992 PERL_ASYNC_CHECK ();
993
994 if (cctx_current->flags & CC_TRACE_ALL)
995 {
996 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
997 {
998 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
999 SV **bot, **top;
1000 AV *av = newAV (); /* return values */
1001 SV **cb;
1002 dSP;
1003
1004 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0));
1006 if (isGV (gv))
1007 gv_efullname3 (fullname, gv, 0);
1008
1009 bot = PL_stack_base + cx->blk_oldsp + 1;
1010 top = cx->blk_gimme == G_ARRAY ? SP + 1
1011 : cx->blk_gimme == G_SCALAR ? bot + 1
1012 : bot;
1013
1014 av_extend (av, top - bot);
1015 while (bot < top)
1016 av_push (av, SvREFCNT_inc_NN (*bot++));
1017
1018 PL_runops = RUNOPS_DEFAULT;
1019 ENTER;
1020 SAVETMPS;
1021 EXTEND (SP, 3);
1022 PUSHMARK (SP);
1023 PUSHs (&PL_sv_no);
1024 PUSHs (fullname);
1025 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1026 PUTBACK;
1027 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1028 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1029 SPAGAIN;
1030 FREETMPS;
1031 LEAVE;
1032 PL_runops = runops_trace;
1033 }
1034
1035 if (oldcop != PL_curcop)
1036 {
1037 oldcop = PL_curcop;
1038
1039 if (PL_curcop != &PL_compiling)
1040 {
1041 SV **cb;
1042
1043 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1044 {
1045 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1046
1047 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1048 {
1049 dSP;
1050 GV *gv = CvGV (cx->blk_sub.cv);
1051 SV *fullname = sv_2mortal (newSV (0));
1052
1053 if (isGV (gv))
1054 gv_efullname3 (fullname, gv, 0);
1055
1056 PL_runops = RUNOPS_DEFAULT;
1057 ENTER;
1058 SAVETMPS;
1059 EXTEND (SP, 3);
1060 PUSHMARK (SP);
1061 PUSHs (&PL_sv_yes);
1062 PUSHs (fullname);
1063 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1064 PUTBACK;
1065 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1066 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1067 SPAGAIN;
1068 FREETMPS;
1069 LEAVE;
1070 PL_runops = runops_trace;
1071 }
1072
1073 oldcxix = cxstack_ix;
1074 }
1075
1076 if (cctx_current->flags & CC_TRACE_LINE)
1077 {
1078 dSP;
1079
1080 PL_runops = RUNOPS_DEFAULT;
1081 ENTER;
1082 SAVETMPS;
1083 EXTEND (SP, 3);
1084 PL_runops = RUNOPS_DEFAULT;
1085 PUSHMARK (SP);
1086 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1087 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1088 PUTBACK;
1089 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1090 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1091 SPAGAIN;
1092 FREETMPS;
1093 LEAVE;
1094 PL_runops = runops_trace;
1095 }
1096 }
1097 }
1098 }
1099 }
1100
1101 TAINT_NOT;
1102 return 0;
1103}
1104
1105static struct CoroSLF cctx_ssl_frame;
1106
1107static void
1108slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1109{
1110 ta->prev = 0;
1111}
1112
1113static int
1114slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1115{
1116 *frame = cctx_ssl_frame;
1117
1118 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1119}
1120
1121/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1122static void NOINLINE
1123cctx_prepare (pTHX)
1124{
1125 PL_top_env = &PL_start_env;
1126
1127 if (cctx_current->flags & CC_TRACE)
1128 PL_runops = runops_trace;
1129
1130 /* we already must be executing an SLF op, there is no other valid way
1131 * that can lead to creation of a new cctx */
1132 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1133 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1134
1135 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1136 cctx_ssl_frame = slf_frame;
1137
1138 slf_frame.prepare = slf_prepare_set_stacklevel;
1139 slf_frame.check = slf_check_set_stacklevel;
1140}
1141
1142/* the tail of transfer: execute stuff we can only do after a transfer */
1143INLINE void
1144transfer_tail (pTHX)
1145{
1146 free_coro_mortal (aTHX);
1147}
1148
1149/*
1150 * this is a _very_ stripped down perl interpreter ;)
1151 */
1152static void
1153cctx_run (void *arg)
1154{
1155#ifdef USE_ITHREADS
1156# if CORO_PTHREAD
1157 PERL_SET_CONTEXT (coro_thx);
1158# endif
1159#endif
1160 {
1161 dTHX;
1162
1163 /* normally we would need to skip the entersub here */
1164 /* not doing so will re-execute it, which is exactly what we want */
1165 /* PL_nop = PL_nop->op_next */
1166
1167 /* inject a fake subroutine call to cctx_init */
1168 cctx_prepare (aTHX);
1169
1170 /* cctx_run is the alternative tail of transfer() */
1171 transfer_tail (aTHX);
1172
1173 /* somebody or something will hit me for both perl_run and PL_restartop */
1174 PL_restartop = PL_op;
1175 perl_run (PL_curinterp);
1176 /*
1177 * Unfortunately, there is no way to get at the return values of the
1178 * coro body here, as perl_run destroys these
1179 */
1180
1181 /*
1182 * If perl-run returns we assume exit() was being called or the coro
1183 * fell off the end, which seems to be the only valid (non-bug)
1184 * reason for perl_run to return. We try to exit by jumping to the
1185 * bootstrap-time "top" top_env, as we cannot restore the "main"
1186 * coroutine as Coro has no such concept.
1187 * This actually isn't valid with the pthread backend, but OSes requiring
1188 * that backend are too broken to do it in a standards-compliant way.
1189 */
1190 PL_top_env = main_top_env;
1191 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1192 }
1193}
1194
1195static coro_cctx *
1196cctx_new ()
1197{
1198 coro_cctx *cctx;
1199
1200 ++cctx_count;
1201 New (0, cctx, 1, coro_cctx);
1202
1203 cctx->gen = cctx_gen;
1204 cctx->flags = 0;
1205 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1206
1207 return cctx;
1208}
1209
1210/* create a new cctx only suitable as source */
1211static coro_cctx *
1212cctx_new_empty ()
1213{
1214 coro_cctx *cctx = cctx_new ();
1215
1216 cctx->sptr = 0;
1217 coro_create (&cctx->cctx, 0, 0, 0, 0);
1218
1219 return cctx;
1220}
1221
1222/* create a new cctx suitable as destination/running a perl interpreter */
1223static coro_cctx *
1224cctx_new_run ()
1225{
1226 coro_cctx *cctx = cctx_new ();
1227 void *stack_start;
1228 size_t stack_size;
1229
1230#if HAVE_MMAP
1231 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1232 /* mmap supposedly does allocate-on-write for us */
1233 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1234
1235 if (cctx->sptr != (void *)-1)
1236 {
1237 #if CORO_STACKGUARD
1238 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1239 #endif
1240 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1241 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1242 cctx->flags |= CC_MAPPED;
1243 }
1244 else
1245#endif
1246 {
1247 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1248 New (0, cctx->sptr, cctx_stacksize, long);
1249
1250 if (!cctx->sptr)
1251 {
1252 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1253 _exit (EXIT_FAILURE);
1254 }
1255
1256 stack_start = cctx->sptr;
1257 stack_size = cctx->ssize;
1258 }
1259
1260 #if CORO_USE_VALGRIND
1261 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1262 #endif
1263
1264 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1265
1266 return cctx;
1267}
1268
1269static void
1270cctx_destroy (coro_cctx *cctx)
1271{
1272 if (!cctx)
1273 return;
1274
1275 assert (cctx != cctx_current);//D temporary
1276
1277 --cctx_count;
1278 coro_destroy (&cctx->cctx);
1279
1280 /* coro_transfer creates new, empty cctx's */
1281 if (cctx->sptr)
1282 {
1283 #if CORO_USE_VALGRIND
1284 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1285 #endif
1286
1287#if HAVE_MMAP
1288 if (cctx->flags & CC_MAPPED)
1289 munmap (cctx->sptr, cctx->ssize);
1290 else
1291#endif
1292 Safefree (cctx->sptr);
1293 }
1294
1295 Safefree (cctx);
1296}
1297
1298/* wether this cctx should be destructed */
1299#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1300
1301static coro_cctx *
1302cctx_get (pTHX)
1303{
1304 while (expect_true (cctx_first))
1305 {
1306 coro_cctx *cctx = cctx_first;
1307 cctx_first = cctx->next;
1308 --cctx_idle;
1309
1310 if (expect_true (!CCTX_EXPIRED (cctx)))
1311 return cctx;
1312
1313 cctx_destroy (cctx);
1314 }
1315
1316 return cctx_new_run ();
1317}
1318
1319static void
1320cctx_put (coro_cctx *cctx)
1321{
1322 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1323
1324 /* free another cctx if overlimit */
1325 if (expect_false (cctx_idle >= cctx_max_idle))
1326 {
1327 coro_cctx *first = cctx_first;
1328 cctx_first = first->next;
1329 --cctx_idle;
1330
1331 cctx_destroy (first);
1332 }
1333
1334 ++cctx_idle;
1335 cctx->next = cctx_first;
1336 cctx_first = cctx;
1337}
1338
1339/** coroutine switching *****************************************************/
1340
1341static void
1342transfer_check (pTHX_ struct coro *prev, struct coro *next)
1343{
1344 /* TODO: throwing up here is considered harmful */
1345
1346 if (expect_true (prev != next))
1347 {
1348 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1349 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1350
1351 if (expect_false (next->flags & CF_RUNNING))
1352 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1353
1354 if (expect_false (next->flags & CF_DESTROYED))
1355 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1356
1357#if !PERL_VERSION_ATLEAST (5,10,0)
1358 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1359 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1360#endif
1361 }
1362}
1363
1364/* always use the TRANSFER macro */
1365static void NOINLINE /* noinline so we have a fixed stackframe */
1366transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1367{
1368 dSTACKLEVEL;
1369
1370 /* sometimes transfer is only called to set idle_sp */
1371 if (expect_false (!prev))
1372 {
1373 cctx_current->idle_sp = STACKLEVEL;
1374 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1375 }
1376 else if (expect_true (prev != next))
1377 {
1378 coro_cctx *cctx_prev;
1379
1380 if (expect_false (prev->flags & CF_NEW))
1381 {
1382 /* create a new empty/source context */
1383 prev->flags &= ~CF_NEW;
1384 prev->flags |= CF_RUNNING;
1385 }
1386
1387 prev->flags &= ~CF_RUNNING;
1388 next->flags |= CF_RUNNING;
1389
1390 /* first get rid of the old state */
1391 save_perl (aTHX_ prev);
1392
1393 if (expect_false (next->flags & CF_NEW))
1394 {
1395 /* need to start coroutine */
1396 next->flags &= ~CF_NEW;
1397 /* setup coroutine call */
1398 coro_setup (aTHX_ next);
1399 }
1400 else
1401 load_perl (aTHX_ next);
1402
1403 assert (!prev->cctx);//D temporary
1404
1405 /* possibly untie and reuse the cctx */
1406 if (expect_true (
1407 cctx_current->idle_sp == STACKLEVEL
1408 && !(cctx_current->flags & CC_TRACE)
1409 && !force_cctx
1410 ))
1411 {
1412 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1413 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1414
1415 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1416 /* without this the next cctx_get might destroy the running cctx while still in use */
1417 if (expect_false (CCTX_EXPIRED (cctx_current)))
1418 if (expect_true (!next->cctx))
1419 next->cctx = cctx_get (aTHX);
1420
1421 cctx_put (cctx_current);
1422 }
1423 else
1424 prev->cctx = cctx_current;
1425
1426 ++next->usecount;
1427
1428 cctx_prev = cctx_current;
1429 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1430
1431 next->cctx = 0;
1432
1433 if (expect_false (cctx_prev != cctx_current))
1434 {
1435 cctx_prev->top_env = PL_top_env;
1436 PL_top_env = cctx_current->top_env;
1437 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1438 }
1439
1440 transfer_tail (aTHX);
1441 }
1442}
1443
1444#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1445#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1446
1447/** high level stuff ********************************************************/
1448
1449static int
1450coro_state_destroy (pTHX_ struct coro *coro)
1451{
1452 if (coro->flags & CF_DESTROYED)
1453 return 0;
1454
1455 if (coro->on_destroy)
1456 coro->on_destroy (aTHX_ coro);
1457
1458 coro->flags |= CF_DESTROYED;
1459
1460 if (coro->flags & CF_READY)
1461 {
1462 /* reduce nready, as destroying a ready coro effectively unreadies it */
1463 /* alternative: look through all ready queues and remove the coro */
1464 --coro_nready;
1465 }
1466 else
1467 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1468
1469 if (coro->mainstack && coro->mainstack != main_mainstack)
1470 {
1471 struct coro temp;
1472
1473 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1474
1475 save_perl (aTHX_ &temp);
1476 load_perl (aTHX_ coro);
1477
1478 coro_destruct (aTHX_ coro);
1479
1480 load_perl (aTHX_ &temp);
1481
1482 coro->slot = 0;
1483 }
1484
1485 cctx_destroy (coro->cctx);
1486 SvREFCNT_dec (coro->startcv);
1487 SvREFCNT_dec (coro->args);
1488 SvREFCNT_dec (CORO_THROW);
1489
1490 if (coro->next) coro->next->prev = coro->prev;
1491 if (coro->prev) coro->prev->next = coro->next;
1492 if (coro == coro_first) coro_first = coro->next;
1493
1494 return 1;
1495}
1496
1497static int
1498coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1499{
1500 struct coro *coro = (struct coro *)mg->mg_ptr;
1501 mg->mg_ptr = 0;
1502
1503 coro->hv = 0;
1504
1505 if (--coro->refcnt < 0)
1506 {
1507 coro_state_destroy (aTHX_ coro);
1508 Safefree (coro);
1509 }
1510
1511 return 0;
1512}
1513
1514static int
1515coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1516{
1517 struct coro *coro = (struct coro *)mg->mg_ptr;
1518
1519 ++coro->refcnt;
1520
1521 return 0;
1522}
1523
1524static MGVTBL coro_state_vtbl = {
1525 0, 0, 0, 0,
1526 coro_state_free,
1527 0,
1528#ifdef MGf_DUP
1529 coro_state_dup,
1530#else
1531# define MGf_DUP 0
1532#endif
1533};
1534
1535static void
1536prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1537{
1538 ta->prev = SvSTATE (prev_sv);
1539 ta->next = SvSTATE (next_sv);
1540 TRANSFER_CHECK (*ta);
1541}
1542
1543static void
1544api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1545{
1546 struct coro_transfer_args ta;
1547
1548 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1549 TRANSFER (ta, 1);
1550}
1551
1552/*****************************************************************************/
1553/* gensub: simple closure generation utility */
1554
1555#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1556
1557/* create a closure from XS, returns a code reference */
1558/* the arg can be accessed via GENSUB_ARG from the callback */
1559/* the callback must use dXSARGS/XSRETURN */
1560static SV *
1561gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1562{
1563 CV *cv = (CV *)newSV (0);
1564
1565 sv_upgrade ((SV *)cv, SVt_PVCV);
1566
1567 CvANON_on (cv);
1568 CvISXSUB_on (cv);
1569 CvXSUB (cv) = xsub;
1570 GENSUB_ARG = arg;
1571
1572 return newRV_noinc ((SV *)cv);
1573}
1574
1575/** Coro ********************************************************************/
1576
1577INLINE void
1578coro_enq (pTHX_ struct coro *coro)
1579{
1580 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1581}
1582
1583INLINE SV *
1584coro_deq (pTHX)
1585{
1586 int prio;
1587
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1588 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1589 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1590 return av_shift (coro_ready [prio]);
892 }
893 1591
894 return 0; 1592 return 0;
895} 1593}
896 1594
897static int 1595static int
898api_ready (SV *coro_sv) 1596api_ready (pTHX_ SV *coro_sv)
899{ 1597{
900 struct coro *coro; 1598 struct coro *coro;
901 1599 SV *sv_hook;
902 if (SvROK (coro_sv)) 1600 void (*xs_hook)(void);
903 coro_sv = SvRV (coro_sv);
904 1601
905 coro = SvSTATE (coro_sv); 1602 coro = SvSTATE (coro_sv);
906 1603
907 if (coro->flags & CF_READY) 1604 if (coro->flags & CF_READY)
908 return 0; 1605 return 0;
909 1606
1607 coro->flags |= CF_READY;
1608
1609 sv_hook = coro_nready ? 0 : coro_readyhook;
1610 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1611
1612 coro_enq (aTHX_ coro);
1613 ++coro_nready;
1614
1615 if (sv_hook)
1616 {
1617 dSP;
1618
1619 ENTER;
1620 SAVETMPS;
1621
1622 PUSHMARK (SP);
1623 PUTBACK;
1624 call_sv (sv_hook, G_VOID | G_DISCARD);
1625
1626 FREETMPS;
1627 LEAVE;
1628 }
1629
1630 if (xs_hook)
1631 xs_hook ();
1632
1633 return 1;
1634}
1635
1636static int
1637api_is_ready (pTHX_ SV *coro_sv)
1638{
1639 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1640}
1641
1642/* expects to own a reference to next->hv */
1643INLINE void
1644prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1645{
1646 SV *prev_sv = SvRV (coro_current);
1647
1648 ta->prev = SvSTATE_hv (prev_sv);
1649 ta->next = next;
1650
1651 TRANSFER_CHECK (*ta);
1652
1653 SvRV_set (coro_current, (SV *)next->hv);
1654
1655 free_coro_mortal (aTHX);
1656 coro_mortal = prev_sv;
1657}
1658
1659static void
1660prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1661{
1662 for (;;)
1663 {
1664 SV *next_sv = coro_deq (aTHX);
1665
1666 if (expect_true (next_sv))
1667 {
1668 struct coro *next = SvSTATE_hv (next_sv);
1669
1670 /* cannot transfer to destroyed coros, skip and look for next */
1671 if (expect_false (next->flags & CF_DESTROYED))
1672 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1673 else
1674 {
1675 next->flags &= ~CF_READY;
1676 --coro_nready;
1677
1678 prepare_schedule_to (aTHX_ ta, next);
1679 break;
1680 }
1681 }
1682 else
1683 {
1684 /* nothing to schedule: call the idle handler */
1685 if (SvROK (sv_idle)
1686 && SvOBJECT (SvRV (sv_idle)))
1687 {
1688 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1689 api_ready (aTHX_ SvRV (sv_idle));
1690 --coro_nready;
1691 }
1692 else
1693 {
1694 dSP;
1695
1696 ENTER;
1697 SAVETMPS;
1698
1699 PUSHMARK (SP);
1700 PUTBACK;
1701 call_sv (sv_idle, G_VOID | G_DISCARD);
1702
1703 FREETMPS;
1704 LEAVE;
1705 }
1706 }
1707 }
1708}
1709
1710INLINE void
1711prepare_cede (pTHX_ struct coro_transfer_args *ta)
1712{
1713 api_ready (aTHX_ coro_current);
1714 prepare_schedule (aTHX_ ta);
1715}
1716
1717INLINE void
1718prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1719{
1720 SV *prev = SvRV (coro_current);
1721
1722 if (coro_nready)
1723 {
1724 prepare_schedule (aTHX_ ta);
1725 api_ready (aTHX_ prev);
1726 }
1727 else
1728 prepare_nop (aTHX_ ta);
1729}
1730
1731static void
1732api_schedule (pTHX)
1733{
1734 struct coro_transfer_args ta;
1735
1736 prepare_schedule (aTHX_ &ta);
1737 TRANSFER (ta, 1);
1738}
1739
1740static void
1741api_schedule_to (pTHX_ SV *coro_sv)
1742{
1743 struct coro_transfer_args ta;
1744 struct coro *next = SvSTATE (coro_sv);
1745
1746 SvREFCNT_inc_NN (coro_sv);
1747 prepare_schedule_to (aTHX_ &ta, next);
1748}
1749
1750static int
1751api_cede (pTHX)
1752{
1753 struct coro_transfer_args ta;
1754
1755 prepare_cede (aTHX_ &ta);
1756
1757 if (expect_true (ta.prev != ta.next))
1758 {
1759 TRANSFER (ta, 1);
1760 return 1;
1761 }
1762 else
1763 return 0;
1764}
1765
1766static int
1767api_cede_notself (pTHX)
1768{
1769 if (coro_nready)
1770 {
1771 struct coro_transfer_args ta;
1772
1773 prepare_cede_notself (aTHX_ &ta);
1774 TRANSFER (ta, 1);
1775 return 1;
1776 }
1777 else
1778 return 0;
1779}
1780
1781static void
1782api_trace (pTHX_ SV *coro_sv, int flags)
1783{
1784 struct coro *coro = SvSTATE (coro_sv);
1785
910 if (coro->flags & CF_RUNNING) 1786 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine"); 1787 croak ("cannot enable tracing on a running coroutine, caught");
912 1788
913 coro->flags |= CF_READY; 1789 if (flags & CC_TRACE)
1790 {
1791 if (!coro->cctx)
1792 coro->cctx = cctx_new_run ();
1793 else if (!(coro->cctx->flags & CC_TRACE))
1794 croak ("cannot enable tracing on coroutine with custom stack, caught");
914 1795
915 LOCK; 1796 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
916 coro_enq (SvREFCNT_inc (coro_sv)); 1797 }
917 UNLOCK; 1798 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1799 {
1800 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
918 1801
919 return 1; 1802 if (coro->flags & CF_RUNNING)
1803 PL_runops = RUNOPS_DEFAULT;
1804 else
1805 coro->slot->runops = RUNOPS_DEFAULT;
1806 }
920} 1807}
1808
1809static void
1810coro_call_on_destroy (pTHX_ struct coro *coro)
1811{
1812 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1813 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1814
1815 if (on_destroyp)
1816 {
1817 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1818
1819 while (AvFILLp (on_destroy) >= 0)
1820 {
1821 dSP; /* don't disturb outer sp */
1822 SV *cb = av_pop (on_destroy);
1823
1824 PUSHMARK (SP);
1825
1826 if (statusp)
1827 {
1828 int i;
1829 AV *status = (AV *)SvRV (*statusp);
1830 EXTEND (SP, AvFILLp (status) + 1);
1831
1832 for (i = 0; i <= AvFILLp (status); ++i)
1833 PUSHs (AvARRAY (status)[i]);
1834 }
1835
1836 PUTBACK;
1837 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1838 }
1839 }
1840}
1841
1842static void
1843slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1844{
1845 int i;
1846 HV *hv = (HV *)SvRV (coro_current);
1847 AV *av = newAV ();
1848
1849 av_extend (av, items - 1);
1850 for (i = 0; i < items; ++i)
1851 av_push (av, SvREFCNT_inc_NN (arg [i]));
1852
1853 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1854
1855 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1856 api_ready (aTHX_ sv_manager);
1857
1858 frame->prepare = prepare_schedule;
1859 frame->check = slf_check_repeat;
1860}
1861
1862/*****************************************************************************/
1863/* async pool handler */
921 1864
922static int 1865static int
923api_is_ready (SV *coro_sv) 1866slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
924{ 1867{
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1868 HV *hv = (HV *)SvRV (coro_current);
926} 1869 struct coro *coro = (struct coro *)frame->data;
927 1870
928static void 1871 if (!coro->invoke_cb)
929prepare_schedule (struct transfer_args *ta) 1872 return 1; /* loop till we have invoke */
930{ 1873 else
931 SV *current, *prev, *next;
932
933 current = GvSV (coro_current);
934
935 for (;;)
936 { 1874 {
937 LOCK; 1875 hv_store (hv, "desc", sizeof ("desc") - 1,
938 next = coro_deq (PRIO_MIN); 1876 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
939 UNLOCK;
940 1877
941 if (next) 1878 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
942 break;
943 1879
944 { 1880 {
945 dSP; 1881 dSP;
946 1882 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
947 ENTER;
948 SAVETMPS;
949
950 PUSHMARK (SP);
951 PUTBACK; 1883 PUTBACK;
952 call_sv (GvSV (coro_idle), G_DISCARD);
953
954 FREETMPS;
955 LEAVE;
956 } 1884 }
1885
1886 SvREFCNT_dec (GvAV (PL_defgv));
1887 GvAV (PL_defgv) = coro->invoke_av;
1888 coro->invoke_av = 0;
1889
1890 return 0;
1891 }
1892}
1893
1894static void
1895slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 HV *hv = (HV *)SvRV (coro_current);
1898 struct coro *coro = SvSTATE_hv ((SV *)hv);
1899
1900 if (expect_true (coro->saved_deffh))
957 } 1901 {
1902 /* subsequent iteration */
1903 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1904 coro->saved_deffh = 0;
958 1905
959 prev = SvRV (current); 1906 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
960 SvRV (current) = next; 1907 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1908 {
1909 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1910 coro->invoke_av = newAV ();
961 1911
962 /* free this only after the transfer */ 1912 frame->prepare = prepare_nop;
963 LOCK; 1913 }
964 free_coro_mortal (); 1914 else
965 UNLOCK; 1915 {
966 coro_mortal = prev; 1916 av_clear (GvAV (PL_defgv));
1917 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
967 1918
968 ta->prev = SvSTATE (prev); 1919 coro->prio = 0;
969 ta->next = SvSTATE (next);
970 ta->flags = TRANSFER_SAVE_ALL;
971 1920
972 ta->next->flags &= ~CF_READY; 1921 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
973} 1922 api_trace (aTHX_ coro_current, 0);
974 1923
1924 frame->prepare = prepare_schedule;
1925 av_push (av_async_pool, SvREFCNT_inc (hv));
1926 }
1927 }
1928 else
1929 {
1930 /* first iteration, simply fall through */
1931 frame->prepare = prepare_nop;
1932 }
1933
1934 frame->check = slf_check_pool_handler;
1935 frame->data = (void *)coro;
1936}
1937
1938/*****************************************************************************/
1939/* rouse callback */
1940
1941#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1942
1943static void
1944coro_rouse_callback (pTHX_ CV *cv)
1945{
1946 dXSARGS;
1947 SV *data = (SV *)GENSUB_ARG;
1948
1949 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1950 {
1951 /* first call, set args */
1952 AV *av = newAV ();
1953 SV *coro = SvRV (data);
1954
1955 SvRV_set (data, (SV *)av);
1956 api_ready (aTHX_ coro);
1957 SvREFCNT_dec (coro);
1958
1959 /* better take a full copy of the arguments */
1960 while (items--)
1961 av_store (av, items, newSVsv (ST (items)));
1962 }
1963
1964 XSRETURN_EMPTY;
1965}
1966
975static void 1967static int
1968slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1969{
1970 SV *data = (SV *)frame->data;
1971
1972 if (CORO_THROW)
1973 return 0;
1974
1975 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1976 return 1;
1977
1978 /* now push all results on the stack */
1979 {
1980 dSP;
1981 AV *av = (AV *)SvRV (data);
1982 int i;
1983
1984 EXTEND (SP, AvFILLp (av) + 1);
1985 for (i = 0; i <= AvFILLp (av); ++i)
1986 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1987
1988 /* we have stolen the elements, so ste length to zero and free */
1989 AvFILLp (av) = -1;
1990 av_undef (av);
1991
1992 PUTBACK;
1993 }
1994
1995 return 0;
1996}
1997
1998static void
1999slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2000{
2001 SV *cb;
2002
2003 if (items)
2004 cb = arg [0];
2005 else
2006 {
2007 struct coro *coro = SvSTATE_current;
2008
2009 if (!coro->rouse_cb)
2010 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2011
2012 cb = sv_2mortal (coro->rouse_cb);
2013 coro->rouse_cb = 0;
2014 }
2015
2016 if (!SvROK (cb)
2017 || SvTYPE (SvRV (cb)) != SVt_PVCV
2018 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2019 croak ("Coro::rouse_wait called with illegal callback argument,");
2020
2021 {
2022 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2023 SV *data = (SV *)GENSUB_ARG;
2024
2025 frame->data = (void *)data;
2026 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2027 frame->check = slf_check_rouse_wait;
2028 }
2029}
2030
2031static SV *
2032coro_new_rouse_cb (pTHX)
2033{
2034 HV *hv = (HV *)SvRV (coro_current);
2035 struct coro *coro = SvSTATE_hv (hv);
2036 SV *data = newRV_inc ((SV *)hv);
2037 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2038
2039 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2040 SvREFCNT_dec (data); /* magicext increases the refcount */
2041
2042 SvREFCNT_dec (coro->rouse_cb);
2043 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2044
2045 return cb;
2046}
2047
2048/*****************************************************************************/
2049/* schedule-like-function opcode (SLF) */
2050
2051static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2052static const CV *slf_cv;
2053static SV **slf_argv;
2054static int slf_argc, slf_arga; /* count, allocated */
2055static I32 slf_ax; /* top of stack, for restore */
2056
2057/* this restores the stack in the case we patched the entersub, to */
2058/* recreate the stack frame as perl will on following calls */
2059/* since entersub cleared the stack */
2060static OP *
2061pp_restore (pTHX)
2062{
2063 int i;
2064 SV **SP = PL_stack_base + slf_ax;
2065
2066 PUSHMARK (SP);
2067
2068 EXTEND (SP, slf_argc + 1);
2069
2070 for (i = 0; i < slf_argc; ++i)
2071 PUSHs (sv_2mortal (slf_argv [i]));
2072
2073 PUSHs ((SV *)CvGV (slf_cv));
2074
2075 RETURNOP (slf_restore.op_first);
2076}
2077
2078static void
2079slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2080{
2081 SV **arg = (SV **)slf_frame.data;
2082
2083 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2084}
2085
2086static void
2087slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2088{
2089 if (items != 2)
2090 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2091
2092 frame->prepare = slf_prepare_transfer;
2093 frame->check = slf_check_nop;
2094 frame->data = (void *)arg; /* let's hope it will stay valid */
2095}
2096
2097static void
2098slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2099{
2100 frame->prepare = prepare_schedule;
2101 frame->check = slf_check_nop;
2102}
2103
2104static void
976prepare_cede (struct transfer_args *ta) 2105slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
977{ 2106{
2107 struct coro *next = (struct coro *)slf_frame.data;
2108
2109 SvREFCNT_inc_NN (next->hv);
2110 prepare_schedule_to (aTHX_ ta, next);
2111}
2112
2113static void
2114slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2115{
2116 if (!items)
2117 croak ("Coro::schedule_to expects a coroutine argument, caught");
2118
2119 frame->data = (void *)SvSTATE (arg [0]);
2120 frame->prepare = slf_prepare_schedule_to;
2121 frame->check = slf_check_nop;
2122}
2123
2124static void
2125slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2126{
978 api_ready (GvSV (coro_current)); 2127 api_ready (aTHX_ SvRV (coro_current));
979 2128
980 prepare_schedule (ta); 2129 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
981} 2130}
982 2131
983static void 2132static void
984api_schedule (void) 2133slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
985{ 2134{
986 dTHX; 2135 frame->prepare = prepare_cede;
2136 frame->check = slf_check_nop;
2137}
2138
2139static void
2140slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2141{
2142 frame->prepare = prepare_cede_notself;
2143 frame->check = slf_check_nop;
2144}
2145
2146/*
2147 * these not obviously related functions are all rolled into one
2148 * function to increase chances that they all will call transfer with the same
2149 * stack offset
2150 * SLF stands for "schedule-like-function".
2151 */
2152static OP *
2153pp_slf (pTHX)
2154{
2155 I32 checkmark; /* mark SP to see how many elements check has pushed */
2156
2157 /* set up the slf frame, unless it has already been set-up */
2158 /* the latter happens when a new coro has been started */
2159 /* or when a new cctx was attached to an existing coroutine */
2160 if (expect_true (!slf_frame.prepare))
2161 {
2162 /* first iteration */
2163 dSP;
2164 SV **arg = PL_stack_base + TOPMARK + 1;
2165 int items = SP - arg; /* args without function object */
2166 SV *gv = *sp;
2167
2168 /* do a quick consistency check on the "function" object, and if it isn't */
2169 /* for us, divert to the real entersub */
2170 if (SvTYPE (gv) != SVt_PVGV
2171 || !GvCV (gv)
2172 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2173 return PL_ppaddr[OP_ENTERSUB](aTHX);
2174
2175 if (!(PL_op->op_flags & OPf_STACKED))
2176 {
2177 /* ampersand-form of call, use @_ instead of stack */
2178 AV *av = GvAV (PL_defgv);
2179 arg = AvARRAY (av);
2180 items = AvFILLp (av) + 1;
2181 }
2182
2183 /* now call the init function, which needs to set up slf_frame */
2184 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2185 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2186
2187 /* pop args */
2188 SP = PL_stack_base + POPMARK;
2189
2190 PUTBACK;
2191 }
2192
2193 /* now that we have a slf_frame, interpret it! */
2194 /* we use a callback system not to make the code needlessly */
2195 /* complicated, but so we can run multiple perl coros from one cctx */
2196
2197 do
2198 {
987 struct transfer_args ta; 2199 struct coro_transfer_args ta;
988 2200
989 prepare_schedule (&ta); 2201 slf_frame.prepare (aTHX_ &ta);
990 TRANSFER (ta); 2202 TRANSFER (ta, 0);
991}
992 2203
2204 checkmark = PL_stack_sp - PL_stack_base;
2205 }
2206 while (slf_frame.check (aTHX_ &slf_frame));
2207
2208 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2209
2210 /* exception handling */
2211 if (expect_false (CORO_THROW))
2212 {
2213 SV *exception = sv_2mortal (CORO_THROW);
2214
2215 CORO_THROW = 0;
2216 sv_setsv (ERRSV, exception);
2217 croak (0);
2218 }
2219
2220 /* return value handling - mostly like entersub */
2221 /* make sure we put something on the stack in scalar context */
2222 if (GIMME_V == G_SCALAR)
2223 {
2224 dSP;
2225 SV **bot = PL_stack_base + checkmark;
2226
2227 if (sp == bot) /* too few, push undef */
2228 bot [1] = &PL_sv_undef;
2229 else if (sp != bot + 1) /* too many, take last one */
2230 bot [1] = *sp;
2231
2232 SP = bot + 1;
2233
2234 PUTBACK;
2235 }
2236
2237 return NORMAL;
2238}
2239
2240static void
2241api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2242{
2243 int i;
2244 SV **arg = PL_stack_base + ax;
2245 int items = PL_stack_sp - arg + 1;
2246
2247 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2248
2249 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2250 && PL_op->op_ppaddr != pp_slf)
2251 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2252
2253 CvFLAGS (cv) |= CVf_SLF;
2254 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2255 slf_cv = cv;
2256
2257 /* we patch the op, and then re-run the whole call */
2258 /* we have to put the same argument on the stack for this to work */
2259 /* and this will be done by pp_restore */
2260 slf_restore.op_next = (OP *)&slf_restore;
2261 slf_restore.op_type = OP_CUSTOM;
2262 slf_restore.op_ppaddr = pp_restore;
2263 slf_restore.op_first = PL_op;
2264
2265 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2266
2267 if (PL_op->op_flags & OPf_STACKED)
2268 {
2269 if (items > slf_arga)
2270 {
2271 slf_arga = items;
2272 free (slf_argv);
2273 slf_argv = malloc (slf_arga * sizeof (SV *));
2274 }
2275
2276 slf_argc = items;
2277
2278 for (i = 0; i < items; ++i)
2279 slf_argv [i] = SvREFCNT_inc (arg [i]);
2280 }
2281 else
2282 slf_argc = 0;
2283
2284 PL_op->op_ppaddr = pp_slf;
2285 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2286
2287 PL_op = (OP *)&slf_restore;
2288}
2289
2290/*****************************************************************************/
2291/* PerlIO::cede */
2292
2293typedef struct
2294{
2295 PerlIOBuf base;
2296 NV next, every;
2297} PerlIOCede;
2298
2299static IV
2300PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2301{
2302 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2303
2304 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2305 self->next = nvtime () + self->every;
2306
2307 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2308}
2309
2310static SV *
2311PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2312{
2313 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2314
2315 return newSVnv (self->every);
2316}
2317
2318static IV
2319PerlIOCede_flush (pTHX_ PerlIO *f)
2320{
2321 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2322 double now = nvtime ();
2323
2324 if (now >= self->next)
2325 {
2326 api_cede (aTHX);
2327 self->next = now + self->every;
2328 }
2329
2330 return PerlIOBuf_flush (aTHX_ f);
2331}
2332
2333static PerlIO_funcs PerlIO_cede =
2334{
2335 sizeof(PerlIO_funcs),
2336 "cede",
2337 sizeof(PerlIOCede),
2338 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2339 PerlIOCede_pushed,
2340 PerlIOBuf_popped,
2341 PerlIOBuf_open,
2342 PerlIOBase_binmode,
2343 PerlIOCede_getarg,
2344 PerlIOBase_fileno,
2345 PerlIOBuf_dup,
2346 PerlIOBuf_read,
2347 PerlIOBuf_unread,
2348 PerlIOBuf_write,
2349 PerlIOBuf_seek,
2350 PerlIOBuf_tell,
2351 PerlIOBuf_close,
2352 PerlIOCede_flush,
2353 PerlIOBuf_fill,
2354 PerlIOBase_eof,
2355 PerlIOBase_error,
2356 PerlIOBase_clearerr,
2357 PerlIOBase_setlinebuf,
2358 PerlIOBuf_get_base,
2359 PerlIOBuf_bufsiz,
2360 PerlIOBuf_get_ptr,
2361 PerlIOBuf_get_cnt,
2362 PerlIOBuf_set_ptrcnt,
2363};
2364
2365/*****************************************************************************/
2366/* Coro::Semaphore & Coro::Signal */
2367
2368static SV *
2369coro_waitarray_new (pTHX_ int count)
2370{
2371 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2372 AV *av = newAV ();
2373 SV **ary;
2374
2375 /* unfortunately, building manually saves memory */
2376 Newx (ary, 2, SV *);
2377 AvALLOC (av) = ary;
2378#if PERL_VERSION_ATLEAST (5,10,0)
2379 AvARRAY (av) = ary;
2380#else
2381 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2382 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2383 SvPVX ((SV *)av) = (char *)ary;
2384#endif
2385 AvMAX (av) = 1;
2386 AvFILLp (av) = 0;
2387 ary [0] = newSViv (count);
2388
2389 return newRV_noinc ((SV *)av);
2390}
2391
2392/* semaphore */
2393
2394static void
2395coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2396{
2397 SV *count_sv = AvARRAY (av)[0];
2398 IV count = SvIVX (count_sv);
2399
2400 count += adjust;
2401 SvIVX (count_sv) = count;
2402
2403 /* now wake up as many waiters as are expected to lock */
2404 while (count > 0 && AvFILLp (av) > 0)
2405 {
2406 SV *cb;
2407
2408 /* swap first two elements so we can shift a waiter */
2409 AvARRAY (av)[0] = AvARRAY (av)[1];
2410 AvARRAY (av)[1] = count_sv;
2411 cb = av_shift (av);
2412
2413 if (SvOBJECT (cb))
2414 {
2415 api_ready (aTHX_ cb);
2416 --count;
2417 }
2418 else if (SvTYPE (cb) == SVt_PVCV)
2419 {
2420 dSP;
2421 PUSHMARK (SP);
2422 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2423 PUTBACK;
2424 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2425 }
2426
2427 SvREFCNT_dec (cb);
2428 }
2429}
2430
2431static void
2432coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2433{
2434 /* call $sem->adjust (0) to possibly wake up some other waiters */
2435 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2436}
2437
993static void 2438static int
994api_cede (void) 2439slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
995{ 2440{
996 dTHX; 2441 AV *av = (AV *)frame->data;
997 struct transfer_args ta; 2442 SV *count_sv = AvARRAY (av)[0];
998 2443
999 prepare_cede (&ta); 2444 /* if we are about to throw, don't actually acquire the lock, just throw */
1000 TRANSFER (ta); 2445 if (CORO_THROW)
1001} 2446 return 0;
2447 else if (SvIVX (count_sv) > 0)
2448 {
2449 SvSTATE_current->on_destroy = 0;
1002 2450
2451 if (acquire)
2452 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2453 else
2454 coro_semaphore_adjust (aTHX_ av, 0);
2455
2456 return 0;
2457 }
2458 else
2459 {
2460 int i;
2461 /* if we were woken up but can't down, we look through the whole */
2462 /* waiters list and only add us if we aren't in there already */
2463 /* this avoids some degenerate memory usage cases */
2464
2465 for (i = 1; i <= AvFILLp (av); ++i)
2466 if (AvARRAY (av)[i] == SvRV (coro_current))
2467 return 1;
2468
2469 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2470 return 1;
2471 }
2472}
2473
2474static int
2475slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2476{
2477 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2478}
2479
2480static int
2481slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2482{
2483 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2484}
2485
2486static void
2487slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2488{
2489 AV *av = (AV *)SvRV (arg [0]);
2490
2491 if (SvIVX (AvARRAY (av)[0]) > 0)
2492 {
2493 frame->data = (void *)av;
2494 frame->prepare = prepare_nop;
2495 }
2496 else
2497 {
2498 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2499
2500 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2501 frame->prepare = prepare_schedule;
2502
2503 /* to avoid race conditions when a woken-up coro gets terminated */
2504 /* we arrange for a temporary on_destroy that calls adjust (0) */
2505 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2506 }
2507}
2508
2509static void
2510slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2511{
2512 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2513 frame->check = slf_check_semaphore_down;
2514}
2515
2516static void
2517slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2518{
2519 if (items >= 2)
2520 {
2521 /* callback form */
2522 AV *av = (AV *)SvRV (arg [0]);
2523 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2524
2525 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2526
2527 if (SvIVX (AvARRAY (av)[0]) > 0)
2528 coro_semaphore_adjust (aTHX_ av, 0);
2529
2530 frame->prepare = prepare_nop;
2531 frame->check = slf_check_nop;
2532 }
2533 else
2534 {
2535 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2536 frame->check = slf_check_semaphore_wait;
2537 }
2538}
2539
2540/* signal */
2541
2542static void
2543coro_signal_wake (pTHX_ AV *av, int count)
2544{
2545 SvIVX (AvARRAY (av)[0]) = 0;
2546
2547 /* now signal count waiters */
2548 while (count > 0 && AvFILLp (av) > 0)
2549 {
2550 SV *cb;
2551
2552 /* swap first two elements so we can shift a waiter */
2553 cb = AvARRAY (av)[0];
2554 AvARRAY (av)[0] = AvARRAY (av)[1];
2555 AvARRAY (av)[1] = cb;
2556
2557 cb = av_shift (av);
2558
2559 api_ready (aTHX_ cb);
2560 sv_setiv (cb, 0); /* signal waiter */
2561 SvREFCNT_dec (cb);
2562
2563 --count;
2564 }
2565}
2566
2567static int
2568slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2569{
2570 /* if we are about to throw, also stop waiting */
2571 return SvROK ((SV *)frame->data) && !CORO_THROW;
2572}
2573
2574static void
2575slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2576{
2577 AV *av = (AV *)SvRV (arg [0]);
2578
2579 if (SvIVX (AvARRAY (av)[0]))
2580 {
2581 SvIVX (AvARRAY (av)[0]) = 0;
2582 frame->prepare = prepare_nop;
2583 frame->check = slf_check_nop;
2584 }
2585 else
2586 {
2587 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2588
2589 av_push (av, waiter);
2590
2591 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2592 frame->prepare = prepare_schedule;
2593 frame->check = slf_check_signal_wait;
2594 }
2595}
2596
2597/*****************************************************************************/
2598/* Coro::AIO */
2599
2600#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2601
2602/* helper storage struct */
2603struct io_state
2604{
2605 int errorno;
2606 I32 laststype; /* U16 in 5.10.0 */
2607 int laststatval;
2608 Stat_t statcache;
2609};
2610
2611static void
2612coro_aio_callback (pTHX_ CV *cv)
2613{
2614 dXSARGS;
2615 AV *state = (AV *)GENSUB_ARG;
2616 SV *coro = av_pop (state);
2617 SV *data_sv = newSV (sizeof (struct io_state));
2618
2619 av_extend (state, items - 1);
2620
2621 sv_upgrade (data_sv, SVt_PV);
2622 SvCUR_set (data_sv, sizeof (struct io_state));
2623 SvPOK_only (data_sv);
2624
2625 {
2626 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2627
2628 data->errorno = errno;
2629 data->laststype = PL_laststype;
2630 data->laststatval = PL_laststatval;
2631 data->statcache = PL_statcache;
2632 }
2633
2634 /* now build the result vector out of all the parameters and the data_sv */
2635 {
2636 int i;
2637
2638 for (i = 0; i < items; ++i)
2639 av_push (state, SvREFCNT_inc_NN (ST (i)));
2640 }
2641
2642 av_push (state, data_sv);
2643
2644 api_ready (aTHX_ coro);
2645 SvREFCNT_dec (coro);
2646 SvREFCNT_dec ((AV *)state);
2647}
2648
2649static int
2650slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2651{
2652 AV *state = (AV *)frame->data;
2653
2654 /* if we are about to throw, return early */
2655 /* this does not cancel the aio request, but at least */
2656 /* it quickly returns */
2657 if (CORO_THROW)
2658 return 0;
2659
2660 /* one element that is an RV? repeat! */
2661 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2662 return 1;
2663
2664 /* restore status */
2665 {
2666 SV *data_sv = av_pop (state);
2667 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2668
2669 errno = data->errorno;
2670 PL_laststype = data->laststype;
2671 PL_laststatval = data->laststatval;
2672 PL_statcache = data->statcache;
2673
2674 SvREFCNT_dec (data_sv);
2675 }
2676
2677 /* push result values */
2678 {
2679 dSP;
2680 int i;
2681
2682 EXTEND (SP, AvFILLp (state) + 1);
2683 for (i = 0; i <= AvFILLp (state); ++i)
2684 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2685
2686 PUTBACK;
2687 }
2688
2689 return 0;
2690}
2691
2692static void
2693slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2694{
2695 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2696 SV *coro_hv = SvRV (coro_current);
2697 struct coro *coro = SvSTATE_hv (coro_hv);
2698
2699 /* put our coroutine id on the state arg */
2700 av_push (state, SvREFCNT_inc_NN (coro_hv));
2701
2702 /* first see whether we have a non-zero priority and set it as AIO prio */
2703 if (coro->prio)
2704 {
2705 dSP;
2706
2707 static SV *prio_cv;
2708 static SV *prio_sv;
2709
2710 if (expect_false (!prio_cv))
2711 {
2712 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2713 prio_sv = newSViv (0);
2714 }
2715
2716 PUSHMARK (SP);
2717 sv_setiv (prio_sv, coro->prio);
2718 XPUSHs (prio_sv);
2719
2720 PUTBACK;
2721 call_sv (prio_cv, G_VOID | G_DISCARD);
2722 }
2723
2724 /* now call the original request */
2725 {
2726 dSP;
2727 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2728 int i;
2729
2730 PUSHMARK (SP);
2731
2732 /* first push all args to the stack */
2733 EXTEND (SP, items + 1);
2734
2735 for (i = 0; i < items; ++i)
2736 PUSHs (arg [i]);
2737
2738 /* now push the callback closure */
2739 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2740
2741 /* now call the AIO function - we assume our request is uncancelable */
2742 PUTBACK;
2743 call_sv ((SV *)req, G_VOID | G_DISCARD);
2744 }
2745
2746 /* now that the requets is going, we loop toll we have a result */
2747 frame->data = (void *)state;
2748 frame->prepare = prepare_schedule;
2749 frame->check = slf_check_aio_req;
2750}
2751
2752static void
2753coro_aio_req_xs (pTHX_ CV *cv)
2754{
2755 dXSARGS;
2756
2757 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2758
2759 XSRETURN_EMPTY;
2760}
2761
2762/*****************************************************************************/
2763
2764#if CORO_CLONE
2765# include "clone.c"
2766#endif
2767
1003MODULE = Coro::State PACKAGE = Coro::State 2768MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 2769
1005PROTOTYPES: DISABLE 2770PROTOTYPES: DISABLE
1006 2771
1007BOOT: 2772BOOT:
1008{ 2773{
1009#ifdef USE_ITHREADS 2774#ifdef USE_ITHREADS
1010 MUTEX_INIT (&coro_mutex); 2775# if CORO_PTHREAD
2776 coro_thx = PERL_GET_CONTEXT;
2777# endif
1011#endif 2778#endif
1012 BOOT_PAGESIZE; 2779 BOOT_PAGESIZE;
1013 2780
2781 cctx_current = cctx_new_empty ();
2782
2783 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2784 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2785
2786 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2787 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2788 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2789
2790 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2791 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2792 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2793
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2794 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015 2795
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2796 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2797 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2798 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2799 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019 2800
1020 main_mainstack = PL_mainstack; 2801 main_mainstack = PL_mainstack;
2802 main_top_env = PL_top_env;
1021 2803
2804 while (main_top_env->je_prev)
2805 main_top_env = main_top_env->je_prev;
2806
2807 {
2808 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2809
2810 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2811 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2812
2813 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2814 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2815 }
2816
1022 coroapi.ver = CORO_API_VERSION; 2817 coroapi.ver = CORO_API_VERSION;
2818 coroapi.rev = CORO_API_REVISION;
2819
1023 coroapi.transfer = api_transfer; 2820 coroapi.transfer = api_transfer;
2821
2822 coroapi.sv_state = SvSTATE_;
2823 coroapi.execute_slf = api_execute_slf;
2824 coroapi.prepare_nop = prepare_nop;
2825 coroapi.prepare_schedule = prepare_schedule;
2826 coroapi.prepare_cede = prepare_cede;
2827 coroapi.prepare_cede_notself = prepare_cede_notself;
2828
2829 {
2830 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2831
2832 if (!svp) croak ("Time::HiRes is required");
2833 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2834
2835 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2836 }
1024 2837
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2838 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026} 2839}
1027 2840
1028SV * 2841SV *
1029new (char *klass, ...) 2842new (char *klass, ...)
2843 ALIAS:
2844 Coro::new = 1
1030 CODE: 2845 CODE:
1031{ 2846{
1032 struct coro *coro; 2847 struct coro *coro;
2848 MAGIC *mg;
1033 HV *hv; 2849 HV *hv;
2850 CV *cb;
1034 int i; 2851 int i;
1035 2852
2853 if (items > 1)
2854 {
2855 cb = coro_sv_2cv (aTHX_ ST (1));
2856
2857 if (!ix)
2858 {
2859 if (CvISXSUB (cb))
2860 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2861
2862 if (!CvROOT (cb))
2863 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2864 }
2865 }
2866
1036 Newz (0, coro, 1, struct coro); 2867 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV (); 2868 coro->args = newAV ();
2869 coro->flags = CF_NEW;
1038 2870
2871 if (coro_first) coro_first->prev = coro;
2872 coro->next = coro_first;
2873 coro_first = coro;
2874
1039 hv = newHV (); 2875 coro->hv = hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2876 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2877 mg->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2878 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042 2879
2880 if (items > 1)
2881 {
2882 av_extend (coro->args, items - 1 + ix - 1);
2883
2884 if (ix)
2885 {
2886 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2887 cb = cv_coro_run;
2888 }
2889
2890 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2891
1043 for (i = 1; i < items; i++) 2892 for (i = 2; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i))); 2893 av_push (coro->args, newSVsv (ST (i)));
2894 }
1045} 2895}
1046 OUTPUT: 2896 OUTPUT:
1047 RETVAL 2897 RETVAL
1048 2898
1049void 2899void
1050_set_stacklevel (...) 2900transfer (...)
1051 ALIAS: 2901 PROTOTYPE: $$
1052 Coro::State::transfer = 1 2902 CODE:
1053 Coro::schedule = 2 2903 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1054 Coro::cede = 3
1055 Coro::Cont::yield = 4
1056 CODE:
1057{
1058 struct transfer_args ta;
1059 2904
1060 switch (ix) 2905bool
1061 { 2906_destroy (SV *coro_sv)
1062 case 0: 2907 CODE:
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2908 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1064 ta.next = 0; 2909 OUTPUT:
1065 ta.flags = TRANSFER_SET_STACKLEVEL; 2910 RETVAL
1066 break;
1067
1068 case 1:
1069 if (items != 3)
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1071
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1073 break;
1074
1075 case 2:
1076 prepare_schedule (&ta);
1077 break;
1078
1079 case 3:
1080 prepare_cede (&ta);
1081 break;
1082
1083 case 4:
1084 {
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088
1089 yieldstack = *hv_fetch (
1090 (HV *)SvRV (GvSV (coro_current)),
1091 "yieldstack", sizeof ("yieldstack") - 1,
1092 0
1093 );
1094
1095 /* set up @_ -- ugly */
1096 av_clear (defav);
1097 av_fill (defav, items - 1);
1098 while (items--)
1099 av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101 sv = av_pop ((AV *)SvRV (yieldstack));
1102 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104 ta.flags = 0;
1105 SvREFCNT_dec (sv);
1106 }
1107 break;
1108
1109 }
1110
1111 TRANSFER (ta);
1112}
1113 2911
1114void 2912void
1115_clone_state_from (SV *dst, SV *src)
1116 CODE:
1117{
1118 struct coro *coro_src = SvSTATE (src);
1119
1120 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122 ++coro_src->refcnt;
1123 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124}
1125
1126void
1127_exit (code) 2913_exit (int code)
1128 int code
1129 PROTOTYPE: $ 2914 PROTOTYPE: $
1130 CODE: 2915 CODE:
1131 _exit (code); 2916 _exit (code);
1132 2917
2918SV *
2919clone (Coro::State coro)
2920 CODE:
2921{
2922#if CORO_CLONE
2923 struct coro *ncoro = coro_clone (coro);
2924 MAGIC *mg;
2925 /* TODO: too much duplication */
2926 ncoro->hv = newHV ();
2927 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2928 mg->mg_flags |= MGf_DUP;
2929 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2930#else
2931 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2932#endif
2933}
2934 OUTPUT:
2935 RETVAL
2936
2937int
2938cctx_stacksize (int new_stacksize = 0)
2939 PROTOTYPE: ;$
2940 CODE:
2941 RETVAL = cctx_stacksize;
2942 if (new_stacksize)
2943 {
2944 cctx_stacksize = new_stacksize;
2945 ++cctx_gen;
2946 }
2947 OUTPUT:
2948 RETVAL
2949
2950int
2951cctx_max_idle (int max_idle = 0)
2952 PROTOTYPE: ;$
2953 CODE:
2954 RETVAL = cctx_max_idle;
2955 if (max_idle > 1)
2956 cctx_max_idle = max_idle;
2957 OUTPUT:
2958 RETVAL
2959
1133int 2960int
1134cctx_count () 2961cctx_count ()
2962 PROTOTYPE:
1135 CODE: 2963 CODE:
1136 RETVAL = cctx_count; 2964 RETVAL = cctx_count;
1137 OUTPUT: 2965 OUTPUT:
1138 RETVAL 2966 RETVAL
1139 2967
1140int 2968int
1141cctx_idle () 2969cctx_idle ()
2970 PROTOTYPE:
1142 CODE: 2971 CODE:
1143 RETVAL = cctx_idle; 2972 RETVAL = cctx_idle;
1144 OUTPUT: 2973 OUTPUT:
1145 RETVAL 2974 RETVAL
1146 2975
2976void
2977list ()
2978 PROTOTYPE:
2979 PPCODE:
2980{
2981 struct coro *coro;
2982 for (coro = coro_first; coro; coro = coro->next)
2983 if (coro->hv)
2984 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2985}
2986
2987void
2988call (Coro::State coro, SV *coderef)
2989 ALIAS:
2990 eval = 1
2991 CODE:
2992{
2993 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2994 {
2995 struct coro temp;
2996
2997 if (!(coro->flags & CF_RUNNING))
2998 {
2999 PUTBACK;
3000 save_perl (aTHX_ &temp);
3001 load_perl (aTHX_ coro);
3002 }
3003
3004 {
3005 dSP;
3006 ENTER;
3007 SAVETMPS;
3008 PUTBACK;
3009 PUSHSTACK;
3010 PUSHMARK (SP);
3011
3012 if (ix)
3013 eval_sv (coderef, 0);
3014 else
3015 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3016
3017 POPSTACK;
3018 SPAGAIN;
3019 FREETMPS;
3020 LEAVE;
3021 PUTBACK;
3022 }
3023
3024 if (!(coro->flags & CF_RUNNING))
3025 {
3026 save_perl (aTHX_ coro);
3027 load_perl (aTHX_ &temp);
3028 SPAGAIN;
3029 }
3030 }
3031}
3032
3033SV *
3034is_ready (Coro::State coro)
3035 PROTOTYPE: $
3036 ALIAS:
3037 is_ready = CF_READY
3038 is_running = CF_RUNNING
3039 is_new = CF_NEW
3040 is_destroyed = CF_DESTROYED
3041 CODE:
3042 RETVAL = boolSV (coro->flags & ix);
3043 OUTPUT:
3044 RETVAL
3045
3046void
3047throw (Coro::State self, SV *throw = &PL_sv_undef)
3048 PROTOTYPE: $;$
3049 CODE:
3050{
3051 struct coro *current = SvSTATE_current;
3052 SV **throwp = self == current ? &CORO_THROW : &self->except;
3053 SvREFCNT_dec (*throwp);
3054 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3055}
3056
3057void
3058api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3059 PROTOTYPE: $;$
3060 C_ARGS: aTHX_ coro, flags
3061
3062SV *
3063has_cctx (Coro::State coro)
3064 PROTOTYPE: $
3065 CODE:
3066 /* maybe manage the running flag differently */
3067 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3068 OUTPUT:
3069 RETVAL
3070
3071int
3072is_traced (Coro::State coro)
3073 PROTOTYPE: $
3074 CODE:
3075 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3076 OUTPUT:
3077 RETVAL
3078
3079UV
3080rss (Coro::State coro)
3081 PROTOTYPE: $
3082 ALIAS:
3083 usecount = 1
3084 CODE:
3085 switch (ix)
3086 {
3087 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3088 case 1: RETVAL = coro->usecount; break;
3089 }
3090 OUTPUT:
3091 RETVAL
3092
3093void
3094force_cctx ()
3095 PROTOTYPE:
3096 CODE:
3097 cctx_current->idle_sp = 0;
3098
3099void
3100swap_defsv (Coro::State self)
3101 PROTOTYPE: $
3102 ALIAS:
3103 swap_defav = 1
3104 CODE:
3105 if (!self->slot)
3106 croak ("cannot swap state with coroutine that has no saved state,");
3107 else
3108 {
3109 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3110 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3111
3112 SV *tmp = *src; *src = *dst; *dst = tmp;
3113 }
3114
3115
1147MODULE = Coro::State PACKAGE = Coro 3116MODULE = Coro::State PACKAGE = Coro
1148 3117
1149BOOT: 3118BOOT:
1150{ 3119{
1151 int i; 3120 int i;
1152 3121
3122 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3123 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3124 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3125 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3126 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3127 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3128 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3129 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3130 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3131
3132 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3133 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3134 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3135 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3136
1153 coro_stash = gv_stashpv ("Coro", TRUE); 3137 coro_stash = gv_stashpv ("Coro", TRUE);
1154 3138
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 3145
1162 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3146 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 3147 coro_ready[i] = newAV ();
1167 3148
1168 { 3149 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 3150 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1170 3151
1171 coroapi.schedule = api_schedule; 3152 coroapi.schedule = api_schedule;
3153 coroapi.schedule_to = api_schedule_to;
1172 coroapi.cede = api_cede; 3154 coroapi.cede = api_cede;
3155 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 3156 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 3157 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 3158 coroapi.nready = coro_nready;
1176 coroapi.current = coro_current; 3159 coroapi.current = coro_current;
1177 3160
1178 GCoroAPI = &coroapi; 3161 /*GCoroAPI = &coroapi;*/
1179 sv_setiv (sv, (IV)&coroapi); 3162 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 3163 SvREADONLY_on (sv);
1181 } 3164 }
1182} 3165}
1183 3166
3167void
3168terminate (...)
3169 CODE:
3170 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3171
3172void
3173schedule (...)
3174 CODE:
3175 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3176
3177void
3178schedule_to (...)
3179 CODE:
3180 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3181
3182void
3183cede_to (...)
3184 CODE:
3185 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3186
3187void
3188cede (...)
3189 CODE:
3190 CORO_EXECUTE_SLF_XS (slf_init_cede);
3191
3192void
3193cede_notself (...)
3194 CODE:
3195 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3196
3197void
3198_cancel (Coro::State self)
3199 CODE:
3200 coro_state_destroy (aTHX_ self);
3201 coro_call_on_destroy (aTHX_ self);
3202
3203void
3204_set_current (SV *current)
3205 PROTOTYPE: $
3206 CODE:
3207 SvREFCNT_dec (SvRV (coro_current));
3208 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3209
3210void
3211_set_readyhook (SV *hook)
3212 PROTOTYPE: $
3213 CODE:
3214 SvREFCNT_dec (coro_readyhook);
3215 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3216
1184int 3217int
1185prio (Coro::State coro, int newprio = 0) 3218prio (Coro::State coro, int newprio = 0)
3219 PROTOTYPE: $;$
1186 ALIAS: 3220 ALIAS:
1187 nice = 1 3221 nice = 1
1188 CODE: 3222 CODE:
1189{ 3223{
1190 RETVAL = coro->prio; 3224 RETVAL = coro->prio;
1191 3225
1192 if (items > 1) 3226 if (items > 1)
1193 { 3227 {
1194 if (ix) 3228 if (ix)
1195 newprio += coro->prio; 3229 newprio = coro->prio - newprio;
1196 3230
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3231 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3232 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 3233
1200 coro->prio = newprio; 3234 coro->prio = newprio;
1201 } 3235 }
1202} 3236}
3237 OUTPUT:
3238 RETVAL
1203 3239
1204SV * 3240SV *
1205ready (SV *self) 3241ready (SV *self)
1206 PROTOTYPE: $ 3242 PROTOTYPE: $
1207 CODE: 3243 CODE:
1208 RETVAL = boolSV (api_ready (self)); 3244 RETVAL = boolSV (api_ready (aTHX_ self));
1209 OUTPUT:
1210 RETVAL
1211
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT: 3245 OUTPUT:
1218 RETVAL 3246 RETVAL
1219 3247
1220int 3248int
1221nready (...) 3249nready (...)
… …
1223 CODE: 3251 CODE:
1224 RETVAL = coro_nready; 3252 RETVAL = coro_nready;
1225 OUTPUT: 3253 OUTPUT:
1226 RETVAL 3254 RETVAL
1227 3255
1228MODULE = Coro::State PACKAGE = Coro::AIO 3256void
3257_pool_handler (...)
3258 CODE:
3259 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3260
3261void
3262async_pool (SV *cv, ...)
3263 PROTOTYPE: &@
3264 PPCODE:
3265{
3266 HV *hv = (HV *)av_pop (av_async_pool);
3267 AV *av = newAV ();
3268 SV *cb = ST (0);
3269 int i;
3270
3271 av_extend (av, items - 2);
3272 for (i = 1; i < items; ++i)
3273 av_push (av, SvREFCNT_inc_NN (ST (i)));
3274
3275 if ((SV *)hv == &PL_sv_undef)
3276 {
3277 PUSHMARK (SP);
3278 EXTEND (SP, 2);
3279 PUSHs (sv_Coro);
3280 PUSHs ((SV *)cv_pool_handler);
3281 PUTBACK;
3282 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3283 SPAGAIN;
3284
3285 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3286 }
3287
3288 {
3289 struct coro *coro = SvSTATE_hv (hv);
3290
3291 assert (!coro->invoke_cb);
3292 assert (!coro->invoke_av);
3293 coro->invoke_cb = SvREFCNT_inc (cb);
3294 coro->invoke_av = av;
3295 }
3296
3297 api_ready (aTHX_ (SV *)hv);
3298
3299 if (GIMME_V != G_VOID)
3300 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3301 else
3302 SvREFCNT_dec (hv);
3303}
1229 3304
1230SV * 3305SV *
1231_get_state () 3306rouse_cb ()
3307 PROTOTYPE:
1232 CODE: 3308 CODE:
1233{ 3309 RETVAL = coro_new_rouse_cb (aTHX);
1234 struct {
1235 int errorno;
1236 int laststype;
1237 int laststatval;
1238 Stat_t statcache;
1239 } data;
1240
1241 data.errorno = errno;
1242 data.laststype = PL_laststype;
1243 data.laststatval = PL_laststatval;
1244 data.statcache = PL_statcache;
1245
1246 RETVAL = newSVpvn ((char *)&data, sizeof data);
1247}
1248 OUTPUT: 3310 OUTPUT:
1249 RETVAL 3311 RETVAL
1250 3312
1251void 3313void
1252_set_state (char *data_) 3314rouse_wait (...)
1253 PROTOTYPE: $ 3315 PROTOTYPE: ;$
3316 PPCODE:
3317 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3318
3319
3320MODULE = Coro::State PACKAGE = PerlIO::cede
3321
3322BOOT:
3323 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3324
3325
3326MODULE = Coro::State PACKAGE = Coro::Semaphore
3327
3328SV *
3329new (SV *klass, SV *count = 0)
1254 CODE: 3330 CODE:
3331 RETVAL = sv_bless (
3332 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3333 GvSTASH (CvGV (cv))
3334 );
3335 OUTPUT:
3336 RETVAL
3337
3338# helper for Coro::Channel
3339SV *
3340_alloc (int count)
3341 CODE:
3342 RETVAL = coro_waitarray_new (aTHX_ count);
3343 OUTPUT:
3344 RETVAL
3345
3346SV *
3347count (SV *self)
3348 CODE:
3349 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3350 OUTPUT:
3351 RETVAL
3352
3353void
3354up (SV *self, int adjust = 1)
3355 ALIAS:
3356 adjust = 1
3357 CODE:
3358 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3359
3360void
3361down (...)
3362 CODE:
3363 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3364
3365void
3366wait (...)
3367 CODE:
3368 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3369
3370void
3371try (SV *self)
3372 PPCODE:
1255{ 3373{
1256 struct { 3374 AV *av = (AV *)SvRV (self);
3375 SV *count_sv = AvARRAY (av)[0];
3376 IV count = SvIVX (count_sv);
3377
3378 if (count > 0)
3379 {
3380 --count;
3381 SvIVX (count_sv) = count;
3382 XSRETURN_YES;
3383 }
3384 else
3385 XSRETURN_NO;
3386}
3387
3388void
3389waiters (SV *self)
3390 PPCODE:
3391{
3392 AV *av = (AV *)SvRV (self);
3393 int wcount = AvFILLp (av) + 1 - 1;
3394
3395 if (GIMME_V == G_SCALAR)
3396 XPUSHs (sv_2mortal (newSViv (wcount)));
3397 else
3398 {
1257 int errorno; 3399 int i;
1258 int laststype; 3400 EXTEND (SP, wcount);
1259 int laststatval; 3401 for (i = 1; i <= wcount; ++i)
1260 Stat_t statcache; 3402 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1261 } *data = (void *)data_; 3403 }
1262
1263 errno = data->errorno;
1264 PL_laststype = data->laststype;
1265 PL_laststatval = data->laststatval;
1266 PL_statcache = data->statcache;
1267} 3404}
3405
3406MODULE = Coro::State PACKAGE = Coro::Signal
3407
3408SV *
3409new (SV *klass)
3410 CODE:
3411 RETVAL = sv_bless (
3412 coro_waitarray_new (aTHX_ 0),
3413 GvSTASH (CvGV (cv))
3414 );
3415 OUTPUT:
3416 RETVAL
3417
3418void
3419wait (...)
3420 CODE:
3421 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3422
3423void
3424broadcast (SV *self)
3425 CODE:
3426{
3427 AV *av = (AV *)SvRV (self);
3428 coro_signal_wake (aTHX_ av, AvFILLp (av));
3429}
3430
3431void
3432send (SV *self)
3433 CODE:
3434{
3435 AV *av = (AV *)SvRV (self);
3436
3437 if (AvFILLp (av))
3438 coro_signal_wake (aTHX_ av, 1);
3439 else
3440 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3441}
3442
3443IV
3444awaited (SV *self)
3445 CODE:
3446 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3447 OUTPUT:
3448 RETVAL
3449
3450
3451MODULE = Coro::State PACKAGE = Coro::AnyEvent
3452
3453BOOT:
3454 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3455
3456void
3457_schedule (...)
3458 CODE:
3459{
3460 static int incede;
3461
3462 api_cede_notself (aTHX);
3463
3464 ++incede;
3465 while (coro_nready >= incede && api_cede (aTHX))
3466 ;
3467
3468 sv_setsv (sv_activity, &PL_sv_undef);
3469 if (coro_nready >= incede)
3470 {
3471 PUSHMARK (SP);
3472 PUTBACK;
3473 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3474 }
3475
3476 --incede;
3477}
3478
3479
3480MODULE = Coro::State PACKAGE = Coro::AIO
3481
3482void
3483_register (char *target, char *proto, SV *req)
3484 CODE:
3485{
3486 CV *req_cv = coro_sv_2cv (aTHX_ req);
3487 /* newXSproto doesn't return the CV on 5.8 */
3488 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3489 sv_setpv ((SV *)slf_cv, proto);
3490 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3491}
3492

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