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Comparing Coro/Coro/State.xs (file contents):
Revision 1.115 by root, Fri Dec 1 13:36:08 2006 UTC vs.
Revision 1.336 by root, Thu Dec 4 17:29:40 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
23# ifndef PL_ppaddr
24# define PL_ppaddr ppaddr
25# endif
26# ifndef call_sv
27# define call_sv perl_call_sv
28# endif
29# ifndef get_sv
30# define get_sv perl_get_sv
31# endif
32# ifndef get_cv
33# define get_cv perl_get_cv
34# endif
35# ifndef IS_PADGV
36# define IS_PADGV(v) 0
37# endif
38# ifndef IS_PADCONST
39# define IS_PADCONST(v) 0
40# endif
41#endif
42 12
43#include <stdio.h> 13#include <stdio.h>
44#include <errno.h> 14#include <errno.h>
15#include <assert.h>
45 16
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
47# undef STACKGUARD 18# undef setjmp
48#endif 19# undef longjmp
49 20# undef _exit
50#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
51# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
52#endif 24#endif
53 25
54#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
55# include <unistd.h> 27# include <unistd.h>
56# include <sys/mman.h> 28# include <sys/mman.h>
… …
72#else 44#else
73# define PAGESIZE 0 45# define PAGESIZE 0
74# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
75#endif 47#endif
76 48
77/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
78 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
79 * and should be unique. */ 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && 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
80#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
81#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
82 137
83#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
84 139
85#if __GNUC__ >= 3 140#if __GNUC__ >= 3
86# 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
87#else 144#else
88# define attribute(x) 145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
89#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
90 152
91#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
92 154
93#include "CoroAPI.h" 155#include "CoroAPI.h"
94 156#define GCoroAPI (&coroapi) /* very sneaky */
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96 157
97#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
98static perl_mutex coro_mutex; 159# if CORO_PTHREAD
99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101#else
102# define LOCK (void)0
103# define UNLOCK (void)0
104#endif 161# endif
162#endif
105 163
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;
106static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
107static 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;
108static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
109static 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;
110 199
111static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
112static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
113 202
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
114/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
115typedef struct coro_cctx { 213typedef struct coro_cctx
214{
116 struct coro_cctx *next; 215 struct coro_cctx *next;
117 216
118 /* the stack */ 217 /* the stack */
119 void *sptr; 218 void *sptr;
120 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
121 220
122 /* cpu state */ 221 /* cpu state */
123 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 */
124 JMPENV *top_env; 224 JMPENV *top_env;
125 coro_context cctx; 225 coro_context cctx;
126 226
127 int inuse; 227 U32 gen;
128
129#if USE_VALGRIND 228#if CORO_USE_VALGRIND
130 int valgrind_id; 229 int valgrind_id;
131#endif 230#endif
231 unsigned char flags;
132} coro_cctx; 232} coro_cctx;
133 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
134enum { 238enum {
135 CF_RUNNING, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
136 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 */
137}; 243};
138 244
139/* this is a structure representing a perl-level coroutine */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
140struct coro { 246typedef struct
141 /* the c coroutine allocated to this perl coroutine, if any */ 247{
142 coro_cctx *cctx; 248 SV *defsv;
143
144 /* data associated with this coroutine (initial args) */
145 AV *args;
146 int refcnt;
147 int flags;
148
149 /* optionally saved, might be zero */
150 AV *defav; 249 AV *defav;
151 SV *defsv;
152 SV *errsv; 250 SV *errsv;
153 251 SV *irsgv;
252 HV *hinthv;
154#define VAR(name,type) type name; 253#define VAR(name,type) type name;
155# include "state.h" 254# include "state.h"
156#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 */
157 279
158 /* coro process data */ 280 /* coro process data */
159 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;
160}; 292};
161 293
162typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
163typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
164 296
165static AV * 297/* the following variables are effectively part of the perl context */
166coro_clone_padlist (CV *cv) 298/* and get copied between struct coro and these variables */
167{ 299/* the mainr easonw e don't support windows process emulation */
168 AV *padlist = CvPADLIST (cv); 300static struct CoroSLF slf_frame; /* the current slf frame */
169 AV *newpadlist, *newpad;
170
171 newpadlist = newAV ();
172 AvREAL_off (newpadlist);
173#if PERL_VERSION_ATLEAST (5,9,0)
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#else
176 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
177#endif
178 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
179 --AvFILLp (padlist);
180
181 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
182 av_store (newpadlist, 1, (SV *)newpad);
183
184 return newpadlist;
185}
186
187static void
188free_padlist (AV *padlist)
189{
190 /* may be during global destruction */
191 if (SvREFCNT (padlist))
192 {
193 I32 i = AvFILLp (padlist);
194 while (i >= 0)
195 {
196 SV **svp = av_fetch (padlist, i--, FALSE);
197 if (svp)
198 {
199 SV *sv;
200 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
201 SvREFCNT_dec (sv);
202
203 SvREFCNT_dec (*svp);
204 }
205 }
206
207 SvREFCNT_dec ((SV*)padlist);
208 }
209}
210
211static int
212coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
213{
214 AV *padlist;
215 AV *av = (AV *)mg->mg_obj;
216
217 /* casting is fun. */
218 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219 free_padlist (padlist);
220
221 SvREFCNT_dec (av);
222
223 return 0;
224}
225
226#define PERL_MAGIC_coro PERL_MAGIC_ext
227
228static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
229
230#define CORO_MAGIC(cv) \
231 SvMAGIC (cv) \
232 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
233 ? SvMAGIC (cv) \
234 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
235 : 0
236
237/* the next two functions merely cache the padlists */
238static void
239get_padlist (CV *cv)
240{
241 MAGIC *mg = CORO_MAGIC (cv);
242 AV *av;
243
244 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
245 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246 else
247 {
248#if 0
249 /* this is probably cleaner, but also slower? */
250 CV *cp = Perl_cv_clone (cv);
251 CvPADLIST (cv) = CvPADLIST (cp);
252 CvPADLIST (cp) = 0;
253 SvREFCNT_dec (cp);
254#else
255 CvPADLIST (cv) = coro_clone_padlist (cv);
256#endif
257 }
258}
259
260static void
261put_padlist (CV *cv)
262{
263 MAGIC *mg = CORO_MAGIC (cv);
264 AV *av;
265
266 if (!mg)
267 {
268 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
269 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
270 mg->mg_virtual = &vtbl_coro;
271 mg->mg_obj = (SV *)newAV ();
272 }
273
274 av = (AV *)mg->mg_obj;
275
276 if (AvFILLp (av) >= AvMAX (av))
277 av_extend (av, AvMAX (av) + 1);
278
279 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280}
281
282#define SB do {
283#define SE } while (0)
284
285#define LOAD(state) load_state((state));
286#define SAVE(state,flags) save_state((state),(flags));
287
288#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
289
290static void
291load_state(Coro__State c)
292{
293#define VAR(name,type) PL_ ## name = c->name;
294# include "state.h"
295#undef VAR
296
297 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
298 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
299 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
300
301 {
302 dSP;
303 CV *cv;
304
305 /* now do the ugly restore mess */
306 while ((cv = (CV *)POPs))
307 {
308 put_padlist (cv); /* mark this padlist as available */
309 CvDEPTH (cv) = PTR2IV (POPs);
310 CvPADLIST (cv) = (AV *)POPs;
311 }
312
313 PUTBACK;
314 }
315}
316
317static void
318save_state(Coro__State c, int flags)
319{
320 {
321 dSP;
322 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack;
324 PERL_SI *top_si = PL_curstackinfo;
325
326 /*
327 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :(
329 */
330
331 PUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */
333 for (;;)
334 {
335 while (cxix >= 0)
336 {
337 PERL_CONTEXT *cx = &ccstk[cxix--];
338
339 if (CxTYPE(cx) == CXt_SUB)
340 {
341 CV *cv = cx->blk_sub.cv;
342
343 if (CvDEPTH (cv))
344 {
345 EXTEND (SP, 3);
346
347 PUSHs ((SV *)CvPADLIST(cv));
348 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
349 PUSHs ((SV *)cv);
350
351 CvDEPTH (cv) = 0;
352 get_padlist (cv);
353 }
354 }
355#ifdef CXt_FORMAT
356 else if (CxTYPE(cx) == CXt_FORMAT)
357 {
358 /* I never used formats, so how should I know how these are implemented? */
359 /* my bold guess is as a simple, plain sub... */
360 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361 }
362#endif
363 }
364
365 if (top_si->si_type == PERLSI_MAIN)
366 break;
367
368 top_si = top_si->si_prev;
369 ccstk = top_si->si_cxstack;
370 cxix = top_si->si_cxix;
371 }
372
373 PUTBACK;
374 }
375
376 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
377 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
378 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
379
380#define VAR(name,type)c->name = PL_ ## name;
381# include "state.h"
382#undef VAR
383}
384
385/*
386 * allocate various perl stacks. This is an exact copy
387 * of perl.c:init_stacks, except that it uses less memory
388 * on the (sometimes correct) assumption that coroutines do
389 * not usually need a lot of stackspace.
390 */
391static void
392coro_init_stacks ()
393{
394 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
395 PL_curstackinfo->si_type = PERLSI_MAIN;
396 PL_curstack = PL_curstackinfo->si_stack;
397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398
399 PL_stack_base = AvARRAY(PL_curstack);
400 PL_stack_sp = PL_stack_base;
401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402
403 New(50,PL_tmps_stack,96,SV*);
404 PL_tmps_floor = -1;
405 PL_tmps_ix = -1;
406 PL_tmps_max = 96;
407
408 New(54,PL_markstack,16,I32);
409 PL_markstack_ptr = PL_markstack;
410 PL_markstack_max = PL_markstack + 16;
411
412#ifdef SET_MARK_OFFSET
413 SET_MARK_OFFSET;
414#endif
415
416 New(54,PL_scopestack,16,I32);
417 PL_scopestack_ix = 0;
418 PL_scopestack_max = 16;
419
420 New(54,PL_savestack,96,ANY);
421 PL_savestack_ix = 0;
422 PL_savestack_max = 96;
423
424#if !PERL_VERSION_ATLEAST (5,9,0)
425 New(54,PL_retstack,8,OP*);
426 PL_retstack_ix = 0;
427 PL_retstack_max = 8;
428#endif
429}
430
431/*
432 * destroy the stacks, the callchain etc...
433 */
434static void
435coro_destroy_stacks ()
436{
437 if (!IN_DESTRUCT)
438 {
439 /* is this ugly, I ask? */
440 LEAVE_SCOPE (0);
441
442 /* sure it is, but more important: is it correct?? :/ */
443 FREETMPS;
444
445 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
446 }
447
448 while (PL_curstackinfo->si_next)
449 PL_curstackinfo = PL_curstackinfo->si_next;
450
451 while (PL_curstackinfo)
452 {
453 PERL_SI *p = PL_curstackinfo->si_prev;
454
455 { /*D*//*remove*/
456 dSP;
457 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458 PUTBACK; /* possibly superfluous */
459 }
460
461 if (!IN_DESTRUCT)
462 {
463 dounwind (-1);/*D*//*remove*/
464 SvREFCNT_dec (PL_curstackinfo->si_stack);
465 }
466
467 Safefree (PL_curstackinfo->si_cxstack);
468 Safefree (PL_curstackinfo);
469 PL_curstackinfo = p;
470 }
471
472 Safefree (PL_tmps_stack);
473 Safefree (PL_markstack);
474 Safefree (PL_scopestack);
475 Safefree (PL_savestack);
476#if !PERL_VERSION_ATLEAST (5,9,0)
477 Safefree (PL_retstack);
478#endif
479}
480
481static void
482setup_coro (struct coro *coro)
483{
484 /*
485 * emulate part of the perl startup here.
486 */
487
488 coro_init_stacks ();
489
490 PL_curcop = 0;
491 PL_in_eval = 0;
492 PL_curpm = 0;
493
494 {
495 dSP;
496 LOGOP myop;
497
498 /* I have no idea why this is needed, but it is */
499 PUSHMARK (SP);
500
501 SvREFCNT_dec (GvAV (PL_defgv));
502 GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504 Zero (&myop, 1, LOGOP);
505 myop.op_next = Nullop;
506 myop.op_flags = OPf_WANT_VOID;
507
508 PL_op = (OP *)&myop;
509
510 PUSHMARK (SP);
511 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512 PUTBACK;
513 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514 SPAGAIN;
515
516 ENTER; /* necessary e.g. for dounwind */
517 }
518}
519
520static void
521free_coro_mortal ()
522{
523 if (coro_mortal)
524 {
525 SvREFCNT_dec (coro_mortal);
526 coro_mortal = 0;
527 }
528}
529
530static void NOINLINE
531prepare_cctx (coro_cctx *cctx)
532{
533 dSP;
534 LOGOP myop;
535
536 Zero (&myop, 1, LOGOP);
537 myop.op_next = PL_op;
538 myop.op_flags = OPf_WANT_VOID;
539
540 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541
542 PUSHMARK (SP);
543 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544 PUTBACK;
545 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
546 SPAGAIN;
547}
548
549static void
550coro_run (void *arg)
551{
552 /* coro_run is the alternative epilogue of transfer() */
553 UNLOCK;
554
555 /*
556 * this is a _very_ stripped down perl interpreter ;)
557 */
558 PL_top_env = &PL_start_env;
559
560 /* inject call to cctx_init */
561 prepare_cctx ((coro_cctx *)arg);
562
563 /* somebody will hit me for both perl_run and PL_restartop */
564 perl_run (PL_curinterp);
565
566 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
567 abort ();
568}
569
570static coro_cctx *
571cctx_new ()
572{
573 coro_cctx *cctx;
574
575 ++cctx_count;
576
577 New (0, cctx, 1, coro_cctx);
578
579#if HAVE_MMAP
580
581 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
582 /* mmap suppsedly does allocate-on-write for us */
583 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584
585 if (cctx->sptr == (void *)-1)
586 {
587 perror ("FATAL: unable to mmap stack for coroutine");
588 _exit (EXIT_FAILURE);
589 }
590
591# if STACKGUARD
592 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
593# endif
594
595#else
596
597 cctx->ssize = STACKSIZE * (long)sizeof (long);
598 New (0, cctx->sptr, STACKSIZE, long);
599
600 if (!cctx->sptr)
601 {
602 perror ("FATAL: unable to malloc stack for coroutine");
603 _exit (EXIT_FAILURE);
604 }
605
606#endif
607
608#if USE_VALGRIND
609 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611 cctx->ssize + (char *)cctx->sptr
612 );
613#endif
614
615 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
616
617 return cctx;
618}
619
620static void
621cctx_destroy (coro_cctx *cctx)
622{
623 if (!cctx)
624 return;
625
626 --cctx_count;
627
628#if USE_VALGRIND
629 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630#endif
631
632#if HAVE_MMAP
633 munmap (cctx->sptr, cctx->ssize);
634#else
635 Safefree (cctx->sptr);
636#endif
637
638 Safefree (cctx);
639}
640
641static coro_cctx *
642cctx_get ()
643{
644 coro_cctx *cctx;
645
646 if (cctx_first)
647 {
648 cctx = cctx_first;
649 cctx_first = cctx->next;
650 --cctx_idle;
651 }
652 else
653 {
654 cctx = cctx_new ();
655 PL_op = PL_op->op_next;
656 }
657
658 return cctx;
659}
660
661static void
662cctx_put (coro_cctx *cctx)
663{
664 /* free another cctx if overlimit */
665 if (cctx_idle >= MAX_IDLE_CCTX)
666 {
667 coro_cctx *first = cctx_first;
668 cctx_first = first->next;
669 --cctx_idle;
670
671 assert (!first->inuse);
672 cctx_destroy (first);
673 }
674
675 ++cctx_idle;
676 cctx->next = cctx_first;
677 cctx_first = cctx;
678}
679
680/* never call directly, always through the coro_state_transfer global variable */
681static void NOINLINE
682transfer (struct coro *prev, struct coro *next, int flags)
683{
684 dSTACKLEVEL;
685
686 /* sometimes transfer is only called to set idle_sp */
687 if (flags == TRANSFER_SET_STACKLEVEL)
688 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
689 else if (prev != next)
690 {
691 coro_cctx *prev__cctx;
692
693 if (!prev->cctx)
694 {
695 /* create a new empty context */
696 Newz (0, prev->cctx, 1, coro_cctx);
697 prev->cctx->inuse = 1;
698 prev->flags |= CF_RUNNING;
699 }
700
701 if (!prev->flags & CF_RUNNING)
702 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704 if (next->flags & CF_RUNNING)
705 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706
707 prev->flags &= ~CF_RUNNING;
708 next->flags |= CF_RUNNING;
709
710 LOCK;
711
712 if (next->mainstack)
713 {
714 /* coroutine already started */
715 SAVE (prev, flags);
716 LOAD (next);
717 }
718 else
719 {
720 /* need to start coroutine */
721 /* first get rid of the old state */
722 SAVE (prev, -1);
723 /* setup coroutine call */
724 setup_coro (next);
725 /* need a new stack */
726 assert (!next->stack);
727 }
728
729 prev__cctx = prev->cctx;
730
731 /* possibly "free" the cctx */
732 if (prev__cctx->idle_sp == STACKLEVEL)
733 {
734 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735 assert (PL_top_env == prev__cctx->top_env);
736
737 cctx_put (prev__cctx);
738 prev->cctx = 0;
739 }
740
741 if (!next->cctx)
742 next->cctx = cctx_get ();
743
744 if (prev__cctx != next->cctx)
745 {
746 assert ( prev__cctx->inuse);
747 assert (!next->cctx->inuse);
748
749 prev__cctx->inuse = 0;
750 next->cctx->inuse = 1;
751
752 prev__cctx->top_env = PL_top_env;
753 PL_top_env = next->cctx->top_env;
754 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755 }
756
757 free_coro_mortal ();
758
759 UNLOCK;
760 }
761}
762
763struct transfer_args
764{
765 struct coro *prev, *next;
766 int flags;
767};
768
769#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
770
771static void
772coro_state_destroy (struct coro *coro)
773{
774 if (coro->refcnt--)
775 return;
776
777 if (coro->flags & CF_RUNNING)
778 croak ("FATAL: tried to destroy currently running coroutine");
779
780 if (coro->mainstack && coro->mainstack != main_mainstack)
781 {
782 struct coro temp;
783
784 SAVE ((&temp), TRANSFER_SAVE_ALL);
785 LOAD (coro);
786
787 coro_destroy_stacks ();
788
789 LOAD ((&temp)); /* this will get rid of defsv etc.. */
790
791 coro->mainstack = 0;
792 }
793
794 cctx_destroy (coro->cctx);
795 SvREFCNT_dec (coro->args);
796 Safefree (coro);
797}
798
799static int
800coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
801{
802 struct coro *coro = (struct coro *)mg->mg_ptr;
803 mg->mg_ptr = 0;
804
805 coro_state_destroy (coro);
806
807 return 0;
808}
809
810static int
811coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
812{
813 struct coro *coro = (struct coro *)mg->mg_ptr;
814
815 ++coro->refcnt;
816
817 return 0;
818}
819
820static MGVTBL coro_state_vtbl = {
821 0, 0, 0, 0,
822 coro_state_clear,
823 0,
824#ifdef MGf_DUP
825 coro_state_dup,
826#else
827# define MGf_DUP 0
828#endif
829};
830
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
855{
856 ta->prev = SvSTATE (prev);
857 ta->next = SvSTATE (next);
858 ta->flags = flags;
859}
860
861static void
862api_transfer (SV *prev, SV *next, int flags)
863{
864 dTHX;
865 struct transfer_args ta;
866
867 prepare_transfer (&ta, prev, next, flags);
868 TRANSFER (ta);
869}
870 301
871/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
872 303
873#define PRIO_MAX 3 304#define PRIO_MAX 3
874#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
876#define PRIO_LOW -1 307#define PRIO_LOW -1
877#define PRIO_IDLE -3 308#define PRIO_IDLE -3
878#define PRIO_MIN -4 309#define PRIO_MIN -4
879 310
880/* for Coro.pm */ 311/* for Coro.pm */
881static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
883static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
884 318
885static void 319/** lowlevel stuff **********************************************************/
886coro_enq (SV *coro_sv)
887{
888 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
889 coro_nready++;
890}
891 320
892static SV * 321static SV *
893coro_deq (int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
894{ 323{
895 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}
896 330
897 min_prio -= PRIO_MIN; 331static AV *
898 if (min_prio < 0) 332coro_get_av (pTHX_ const char *name, int create)
899 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}
900 340
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
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
384
385 if (SvROK (coro))
386 coro = SvRV (coro);
387
388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
389 croak ("Coro::State object required");
390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
412static AV *
413coro_derive_padlist (pTHX_ CV *cv)
414{
415 AV *padlist = CvPADLIST (cv);
416 AV *newpadlist, *newpad;
417
418 newpadlist = newAV ();
419 AvREAL_off (newpadlist);
420#if PERL_VERSION_ATLEAST (5,10,0)
421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
422#else
423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
424#endif
425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
426 --AvFILLp (padlist);
427
428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
429 av_store (newpadlist, 1, (SV *)newpad);
430
431 return newpadlist;
432}
433
434static void
435free_padlist (pTHX_ AV *padlist)
436{
437 /* may be during global destruction */
438 if (!IN_DESTRUCT)
439 {
440 I32 i = AvFILLp (padlist);
441
442 while (i > 0) /* special-case index 0 */
443 {
444 /* we try to be extra-careful here */
445 AV *av = (AV *)AvARRAY (padlist)[i--];
446 I32 j = AvFILLp (av);
447
448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
452 SvREFCNT_dec (av);
453 }
454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
458 SvREFCNT_dec ((SV*)padlist);
459 }
460}
461
462static int
463coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
464{
465 AV *padlist;
466 AV *av = (AV *)mg->mg_obj;
467
468 /* casting is fun. */
469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
470 free_padlist (aTHX_ padlist);
471
472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
473
474 return 0;
475}
476
477static MGVTBL coro_cv_vtbl = {
478 0, 0, 0, 0,
479 coro_cv_free
480};
481
482/* the next two functions merely cache the padlists */
483static void
484get_padlist (pTHX_ CV *cv)
485{
486 MAGIC *mg = CORO_MAGIC_cv (cv);
487 AV *av;
488
489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
491 else
492 {
493#if CORO_PREFER_PERL_FUNCTIONS
494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
496 CV *cp = Perl_cv_clone (aTHX_ cv);
497 CvPADLIST (cv) = CvPADLIST (cp);
498 CvPADLIST (cp) = 0;
499 SvREFCNT_dec (cp);
500#else
501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
502#endif
503 }
504}
505
506static void
507put_padlist (pTHX_ CV *cv)
508{
509 MAGIC *mg = CORO_MAGIC_cv (cv);
510 AV *av;
511
512 if (expect_false (!mg))
513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
514
515 av = (AV *)mg->mg_obj;
516
517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
518 av_extend (av, AvFILLp (av) + 1);
519
520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
521}
522
523/** load & save, init *******************************************************/
524
525static void
526load_perl (pTHX_ Coro__State c)
527{
528 perl_slots *slot = c->slot;
529 c->slot = 0;
530
531 PL_mainstack = c->mainstack;
532
533 GvSV (PL_defgv) = slot->defsv;
534 GvAV (PL_defgv) = slot->defav;
535 GvSV (PL_errgv) = slot->errsv;
536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
538
539 #define VAR(name,type) PL_ ## name = slot->name;
540 # include "state.h"
541 #undef VAR
542
543 {
544 dSP;
545
546 CV *cv;
547
548 /* now do the ugly restore mess */
549 while (expect_true (cv = (CV *)POPs))
550 {
551 put_padlist (aTHX_ cv); /* mark this padlist as available */
552 CvDEPTH (cv) = PTR2IV (POPs);
553 CvPADLIST (cv) = (AV *)POPs;
554 }
555
556 PUTBACK;
557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
561}
562
563static void
564save_perl (pTHX_ Coro__State c)
565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
569 {
570 dSP;
571 I32 cxix = cxstack_ix;
572 PERL_CONTEXT *ccstk = cxstack;
573 PERL_SI *top_si = PL_curstackinfo;
574
575 /*
576 * the worst thing you can imagine happens first - we have to save
577 * (and reinitialize) all cv's in the whole callchain :(
578 */
579
580 XPUSHs (Nullsv);
581 /* this loop was inspired by pp_caller */
582 for (;;)
583 {
584 while (expect_true (cxix >= 0))
585 {
586 PERL_CONTEXT *cx = &ccstk[cxix--];
587
588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
589 {
590 CV *cv = cx->blk_sub.cv;
591
592 if (expect_true (CvDEPTH (cv)))
593 {
594 EXTEND (SP, 3);
595 PUSHs ((SV *)CvPADLIST (cv));
596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
597 PUSHs ((SV *)cv);
598
599 CvDEPTH (cv) = 0;
600 get_padlist (aTHX_ cv);
601 }
602 }
603 }
604
605 if (expect_true (top_si->si_type == PERLSI_MAIN))
606 break;
607
608 top_si = top_si->si_prev;
609 ccstk = top_si->si_cxstack;
610 cxix = top_si->si_cxix;
611 }
612
613 PUTBACK;
614 }
615
616 /* allocate some space on the context stack for our purposes */
617 /* we manually unroll here, as usually 2 slots is enough */
618 if (SLOT_COUNT >= 1) CXINC;
619 if (SLOT_COUNT >= 2) CXINC;
620 if (SLOT_COUNT >= 3) CXINC;
621 {
622 int i;
623 for (i = 3; i < SLOT_COUNT; ++i)
624 CXINC;
625 }
626 cxstack_ix -= SLOT_COUNT; /* undo allocation */
627
628 c->mainstack = PL_mainstack;
629
630 {
631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
632
633 slot->defav = GvAV (PL_defgv);
634 slot->defsv = DEFSV;
635 slot->errsv = ERRSV;
636 slot->irsgv = GvSV (irsgv);
637 slot->hinthv = GvHV (PL_hintgv);
638
639 #define VAR(name,type) slot->name = PL_ ## name;
640 # include "state.h"
641 #undef VAR
642 }
643}
644
645/*
646 * allocate various perl stacks. This is almost an exact copy
647 * of perl.c:init_stacks, except that it uses less memory
648 * on the (sometimes correct) assumption that coroutines do
649 * not usually need a lot of stackspace.
650 */
651#if CORO_PREFER_PERL_FUNCTIONS
652# define coro_init_stacks(thx) init_stacks ()
653#else
654static void
655coro_init_stacks (pTHX)
656{
657 PL_curstackinfo = new_stackinfo(32, 8);
658 PL_curstackinfo->si_type = PERLSI_MAIN;
659 PL_curstack = PL_curstackinfo->si_stack;
660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
661
662 PL_stack_base = AvARRAY(PL_curstack);
663 PL_stack_sp = PL_stack_base;
664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
665
666 New(50,PL_tmps_stack,32,SV*);
667 PL_tmps_floor = -1;
668 PL_tmps_ix = -1;
669 PL_tmps_max = 32;
670
671 New(54,PL_markstack,16,I32);
672 PL_markstack_ptr = PL_markstack;
673 PL_markstack_max = PL_markstack + 16;
674
675#ifdef SET_MARK_OFFSET
676 SET_MARK_OFFSET;
677#endif
678
679 New(54,PL_scopestack,8,I32);
680 PL_scopestack_ix = 0;
681 PL_scopestack_max = 8;
682
683 New(54,PL_savestack,24,ANY);
684 PL_savestack_ix = 0;
685 PL_savestack_max = 24;
686
687#if !PERL_VERSION_ATLEAST (5,10,0)
688 New(54,PL_retstack,4,OP*);
689 PL_retstack_ix = 0;
690 PL_retstack_max = 4;
691#endif
692}
693#endif
694
695/*
696 * destroy the stacks, the callchain etc...
697 */
698static void
699coro_destruct_stacks (pTHX)
700{
701 while (PL_curstackinfo->si_next)
702 PL_curstackinfo = PL_curstackinfo->si_next;
703
704 while (PL_curstackinfo)
705 {
706 PERL_SI *p = PL_curstackinfo->si_prev;
707
708 if (!IN_DESTRUCT)
709 SvREFCNT_dec (PL_curstackinfo->si_stack);
710
711 Safefree (PL_curstackinfo->si_cxstack);
712 Safefree (PL_curstackinfo);
713 PL_curstackinfo = p;
714 }
715
716 Safefree (PL_tmps_stack);
717 Safefree (PL_markstack);
718 Safefree (PL_scopestack);
719 Safefree (PL_savestack);
720#if !PERL_VERSION_ATLEAST (5,10,0)
721 Safefree (PL_retstack);
722#endif
723}
724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
733
734static size_t
735coro_rss (pTHX_ struct coro *coro)
736{
737 size_t rss = sizeof (*coro);
738
739 if (coro->mainstack)
740 {
741 if (coro->flags & CF_RUNNING)
742 {
743 #define SYM(sym) PL_ ## sym
744 CORO_RSS;
745 #undef SYM
746 }
747 else
748 {
749 #define SYM(sym) coro->slot->sym
750 CORO_RSS;
751 #undef SYM
752 }
753 }
754
755 return rss;
756}
757
758/** coroutine stack handling ************************************************/
759
760static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
761static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
762static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
763
764/* apparently < 5.8.8 */
765#ifndef MgPV_nolen_const
766#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
767 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
768 (const char*)(mg)->mg_ptr)
769#endif
770
771/*
772 * This overrides the default magic get method of %SIG elements.
773 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
774 * and instead of tryign to save and restore the hash elements, we just provide
775 * readback here.
776 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
777 * not expecting this to actually change the hook. This is a potential problem
778 * when a schedule happens then, but we ignore this.
779 */
780static int
781coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
782{
783 const char *s = MgPV_nolen_const (mg);
784
785 if (*s == '_')
786 {
787 SV **svp = 0;
788
789 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
790 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
791
792 if (svp)
793 {
794 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = 0;
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
824}
825
826static int
827coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
828{
829 const char *s = MgPV_nolen_const (mg);
830
831 if (*s == '_')
832 {
833 SV **svp = 0;
834
835 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
836 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
837
838 if (svp)
839 {
840 SV *old = *svp;
841 *svp = newSVsv (sv);
842 SvREFCNT_dec (old);
843 return 0;
844 }
845 }
846
847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
848}
849
850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
872coro_setup (pTHX_ struct coro *coro)
873{
874 /*
875 * emulate part of the perl startup here.
876 */
877 coro_init_stacks (aTHX);
878
879 PL_runops = RUNOPS_DEFAULT;
880 PL_curcop = &PL_compiling;
881 PL_in_eval = EVAL_NULL;
882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
886 PL_curpm = 0;
887 PL_curpad = 0;
888 PL_localizing = 0;
889 PL_dirty = 0;
890 PL_restartop = 0;
891#if PERL_VERSION_ATLEAST (5,10,0)
892 PL_parser = 0;
893#endif
894 PL_hints = 0;
895
896 /* recreate the die/warn hooks */
897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
899
900 GvSV (PL_defgv) = newSV (0);
901 GvAV (PL_defgv) = coro->args; coro->args = 0;
902 GvSV (PL_errgv) = newSV (0);
903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
905 PL_rs = newSVsv (GvSV (irsgv));
906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
907
908 {
909 dSP;
910 UNOP myop;
911
912 Zero (&myop, 1, UNOP);
913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
915 myop.op_flags = OPf_WANT_VOID;
916
917 PUSHMARK (SP);
918 PUSHs ((SV *)coro->startcv);
919 PUTBACK;
920 PL_op = (OP *)&myop;
921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
922 }
923
924 /* this newly created coroutine might be run on an existing cctx which most
925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
926 */
927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
942static void
943coro_destruct_perl (pTHX_ struct coro *coro)
944{
945 if (!IN_DESTRUCT)
946 {
947 /* restore all saved variables and stuff */
948 LEAVE_SCOPE (0);
949 assert (PL_tmps_floor == -1);
950
951 /* free all temporaries */
952 FREETMPS;
953 assert (PL_tmps_ix == -1);
954
955 /* unwind all extra stacks */
956 POPSTACK_TO (PL_mainstack);
957
958 /* unwind main stack */
959 dounwind (-1);
960 }
961
962 SvREFCNT_dec (GvSV (PL_defgv));
963 SvREFCNT_dec (GvAV (PL_defgv));
964 SvREFCNT_dec (GvSV (PL_errgv));
965 SvREFCNT_dec (PL_defoutgv);
966 SvREFCNT_dec (PL_rs);
967 SvREFCNT_dec (GvSV (irsgv));
968 SvREFCNT_dec (GvHV (PL_hintgv));
969
970 SvREFCNT_dec (PL_diehook);
971 SvREFCNT_dec (PL_warnhook);
972
973 SvREFCNT_dec (coro->saved_deffh);
974 SvREFCNT_dec (coro->rouse_cb);
975 SvREFCNT_dec (coro->invoke_cb);
976 SvREFCNT_dec (coro->invoke_av);
977
978 coro_destruct_stacks (aTHX);
979}
980
981INLINE void
982free_coro_mortal (pTHX)
983{
984 if (expect_true (coro_mortal))
985 {
986 SvREFCNT_dec (coro_mortal);
987 coro_mortal = 0;
988 }
989}
990
991static int
992runops_trace (pTHX)
993{
994 COP *oldcop = 0;
995 int oldcxix = -2;
996
997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
998 {
999 PERL_ASYNC_CHECK ();
1000
1001 if (cctx_current->flags & CC_TRACE_ALL)
1002 {
1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1004 {
1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1006 SV **bot, **top;
1007 AV *av = newAV (); /* return values */
1008 SV **cb;
1009 dSP;
1010
1011 GV *gv = CvGV (cx->blk_sub.cv);
1012 SV *fullname = sv_2mortal (newSV (0));
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 bot = PL_stack_base + cx->blk_oldsp + 1;
1017 top = cx->blk_gimme == G_ARRAY ? SP + 1
1018 : cx->blk_gimme == G_SCALAR ? bot + 1
1019 : bot;
1020
1021 av_extend (av, top - bot);
1022 while (bot < top)
1023 av_push (av, SvREFCNT_inc_NN (*bot++));
1024
1025 PL_runops = RUNOPS_DEFAULT;
1026 ENTER;
1027 SAVETMPS;
1028 EXTEND (SP, 3);
1029 PUSHMARK (SP);
1030 PUSHs (&PL_sv_no);
1031 PUSHs (fullname);
1032 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1033 PUTBACK;
1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1036 SPAGAIN;
1037 FREETMPS;
1038 LEAVE;
1039 PL_runops = runops_trace;
1040 }
1041
1042 if (oldcop != PL_curcop)
1043 {
1044 oldcop = PL_curcop;
1045
1046 if (PL_curcop != &PL_compiling)
1047 {
1048 SV **cb;
1049
1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1051 {
1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1053
1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1055 {
1056 dSP;
1057 GV *gv = CvGV (cx->blk_sub.cv);
1058 SV *fullname = sv_2mortal (newSV (0));
1059
1060 if (isGV (gv))
1061 gv_efullname3 (fullname, gv, 0);
1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PUSHMARK (SP);
1068 PUSHs (&PL_sv_yes);
1069 PUSHs (fullname);
1070 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079
1080 oldcxix = cxstack_ix;
1081 }
1082
1083 if (cctx_current->flags & CC_TRACE_LINE)
1084 {
1085 dSP;
1086
1087 PL_runops = RUNOPS_DEFAULT;
1088 ENTER;
1089 SAVETMPS;
1090 EXTEND (SP, 3);
1091 PL_runops = RUNOPS_DEFAULT;
1092 PUSHMARK (SP);
1093 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1094 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1095 PUTBACK;
1096 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1097 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1098 SPAGAIN;
1099 FREETMPS;
1100 LEAVE;
1101 PL_runops = runops_trace;
1102 }
1103 }
1104 }
1105 }
1106 }
1107
1108 TAINT_NOT;
1109 return 0;
1110}
1111
1112static struct CoroSLF cctx_ssl_frame;
1113
1114static void
1115slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1116{
1117 ta->prev = 0;
1118}
1119
1120static int
1121slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1122{
1123 *frame = cctx_ssl_frame;
1124
1125 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1126}
1127
1128/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1129static void NOINLINE
1130cctx_prepare (pTHX)
1131{
1132 PL_top_env = &PL_start_env;
1133
1134 if (cctx_current->flags & CC_TRACE)
1135 PL_runops = runops_trace;
1136
1137 /* we already must be executing an SLF op, there is no other valid way
1138 * that can lead to creation of a new cctx */
1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1141
1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1143 cctx_ssl_frame = slf_frame;
1144
1145 slf_frame.prepare = slf_prepare_set_stacklevel;
1146 slf_frame.check = slf_check_set_stacklevel;
1147}
1148
1149/* the tail of transfer: execute stuff we can only do after a transfer */
1150INLINE void
1151transfer_tail (pTHX)
1152{
1153 free_coro_mortal (aTHX);
1154}
1155
1156/*
1157 * this is a _very_ stripped down perl interpreter ;)
1158 */
1159static void
1160cctx_run (void *arg)
1161{
1162#ifdef USE_ITHREADS
1163# if CORO_PTHREAD
1164 PERL_SET_CONTEXT (coro_thx);
1165# endif
1166#endif
1167 {
1168 dTHX;
1169
1170 /* normally we would need to skip the entersub here */
1171 /* not doing so will re-execute it, which is exactly what we want */
1172 /* PL_nop = PL_nop->op_next */
1173
1174 /* inject a fake subroutine call to cctx_init */
1175 cctx_prepare (aTHX);
1176
1177 /* cctx_run is the alternative tail of transfer() */
1178 transfer_tail (aTHX);
1179
1180 /* somebody or something will hit me for both perl_run and PL_restartop */
1181 PL_restartop = PL_op;
1182 perl_run (PL_curinterp);
1183 /*
1184 * Unfortunately, there is no way to get at the return values of the
1185 * coro body here, as perl_run destroys these
1186 */
1187
1188 /*
1189 * If perl-run returns we assume exit() was being called or the coro
1190 * fell off the end, which seems to be the only valid (non-bug)
1191 * reason for perl_run to return. We try to exit by jumping to the
1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
1193 * coroutine as Coro has no such concept.
1194 * This actually isn't valid with the pthread backend, but OSes requiring
1195 * that backend are too broken to do it in a standards-compliant way.
1196 */
1197 PL_top_env = main_top_env;
1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1199 }
1200}
1201
1202static coro_cctx *
1203cctx_new ()
1204{
1205 coro_cctx *cctx;
1206
1207 ++cctx_count;
1208 New (0, cctx, 1, coro_cctx);
1209
1210 cctx->gen = cctx_gen;
1211 cctx->flags = 0;
1212 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1213
1214 return cctx;
1215}
1216
1217/* create a new cctx only suitable as source */
1218static coro_cctx *
1219cctx_new_empty ()
1220{
1221 coro_cctx *cctx = cctx_new ();
1222
1223 cctx->sptr = 0;
1224 coro_create (&cctx->cctx, 0, 0, 0, 0);
1225
1226 return cctx;
1227}
1228
1229/* create a new cctx suitable as destination/running a perl interpreter */
1230static coro_cctx *
1231cctx_new_run ()
1232{
1233 coro_cctx *cctx = cctx_new ();
1234 void *stack_start;
1235 size_t stack_size;
1236
1237#if HAVE_MMAP
1238 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1239 /* mmap supposedly does allocate-on-write for us */
1240 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1241
1242 if (cctx->sptr != (void *)-1)
1243 {
1244 #if CORO_STACKGUARD
1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1246 #endif
1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1249 cctx->flags |= CC_MAPPED;
1250 }
1251 else
1252#endif
1253 {
1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1255 New (0, cctx->sptr, cctx_stacksize, long);
1256
1257 if (!cctx->sptr)
1258 {
1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1260 _exit (EXIT_FAILURE);
1261 }
1262
1263 stack_start = cctx->sptr;
1264 stack_size = cctx->ssize;
1265 }
1266
1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1269 #endif
1270
1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1272
1273 return cctx;
1274}
1275
1276static void
1277cctx_destroy (coro_cctx *cctx)
1278{
1279 if (!cctx)
1280 return;
1281
1282 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1283
1284 --cctx_count;
1285 coro_destroy (&cctx->cctx);
1286
1287 /* coro_transfer creates new, empty cctx's */
1288 if (cctx->sptr)
1289 {
1290 #if CORO_USE_VALGRIND
1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1292 #endif
1293
1294#if HAVE_MMAP
1295 if (cctx->flags & CC_MAPPED)
1296 munmap (cctx->sptr, cctx->ssize);
1297 else
1298#endif
1299 Safefree (cctx->sptr);
1300 }
1301
1302 Safefree (cctx);
1303}
1304
1305/* wether this cctx should be destructed */
1306#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1307
1308static coro_cctx *
1309cctx_get (pTHX)
1310{
1311 while (expect_true (cctx_first))
1312 {
1313 coro_cctx *cctx = cctx_first;
1314 cctx_first = cctx->next;
1315 --cctx_idle;
1316
1317 if (expect_true (!CCTX_EXPIRED (cctx)))
1318 return cctx;
1319
1320 cctx_destroy (cctx);
1321 }
1322
1323 return cctx_new_run ();
1324}
1325
1326static void
1327cctx_put (coro_cctx *cctx)
1328{
1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1330
1331 /* free another cctx if overlimit */
1332 if (expect_false (cctx_idle >= cctx_max_idle))
1333 {
1334 coro_cctx *first = cctx_first;
1335 cctx_first = first->next;
1336 --cctx_idle;
1337
1338 cctx_destroy (first);
1339 }
1340
1341 ++cctx_idle;
1342 cctx->next = cctx_first;
1343 cctx_first = cctx;
1344}
1345
1346/** coroutine switching *****************************************************/
1347
1348static void
1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
1350{
1351 /* TODO: throwing up here is considered harmful */
1352
1353 if (expect_true (prev != next))
1354 {
1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1357
1358 if (expect_false (next->flags & CF_RUNNING))
1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1360
1361 if (expect_false (next->flags & CF_DESTROYED))
1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1363
1364#if !PERL_VERSION_ATLEAST (5,10,0)
1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1367#endif
1368 }
1369}
1370
1371/* always use the TRANSFER macro */
1372static void NOINLINE /* noinline so we have a fixed stackframe */
1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1374{
1375 dSTACKLEVEL;
1376
1377 /* sometimes transfer is only called to set idle_sp */
1378 if (expect_false (!prev))
1379 {
1380 cctx_current->idle_sp = STACKLEVEL;
1381 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1382 }
1383 else if (expect_true (prev != next))
1384 {
1385 coro_cctx *cctx_prev;
1386
1387 if (expect_false (prev->flags & CF_NEW))
1388 {
1389 /* create a new empty/source context */
1390 prev->flags &= ~CF_NEW;
1391 prev->flags |= CF_RUNNING;
1392 }
1393
1394 prev->flags &= ~CF_RUNNING;
1395 next->flags |= CF_RUNNING;
1396
1397 /* first get rid of the old state */
1398 save_perl (aTHX_ prev);
1399
1400 if (expect_false (next->flags & CF_NEW))
1401 {
1402 /* need to start coroutine */
1403 next->flags &= ~CF_NEW;
1404 /* setup coroutine call */
1405 coro_setup (aTHX_ next);
1406 }
1407 else
1408 load_perl (aTHX_ next);
1409
1410 /* possibly untie and reuse the cctx */
1411 if (expect_true (
1412 cctx_current->idle_sp == STACKLEVEL
1413 && !(cctx_current->flags & CC_TRACE)
1414 && !force_cctx
1415 ))
1416 {
1417 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1418 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1419
1420 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1421 /* without this the next cctx_get might destroy the running cctx while still in use */
1422 if (expect_false (CCTX_EXPIRED (cctx_current)))
1423 if (expect_true (!next->cctx))
1424 next->cctx = cctx_get (aTHX);
1425
1426 cctx_put (cctx_current);
1427 }
1428 else
1429 prev->cctx = cctx_current;
1430
1431 ++next->usecount;
1432
1433 cctx_prev = cctx_current;
1434 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1435
1436 next->cctx = 0;
1437
1438 if (expect_false (cctx_prev != cctx_current))
1439 {
1440 cctx_prev->top_env = PL_top_env;
1441 PL_top_env = cctx_current->top_env;
1442 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1443 }
1444
1445 transfer_tail (aTHX);
1446 }
1447}
1448
1449#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1450#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1451
1452/** high level stuff ********************************************************/
1453
1454static int
1455coro_state_destroy (pTHX_ struct coro *coro)
1456{
1457 if (coro->flags & CF_DESTROYED)
1458 return 0;
1459
1460 if (coro->on_destroy)
1461 coro->on_destroy (aTHX_ coro);
1462
1463 coro->flags |= CF_DESTROYED;
1464
1465 if (coro->flags & CF_READY)
1466 {
1467 /* reduce nready, as destroying a ready coro effectively unreadies it */
1468 /* alternative: look through all ready queues and remove the coro */
1469 --coro_nready;
1470 }
1471 else
1472 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1473
1474 if (coro->mainstack
1475 && coro->mainstack != main_mainstack
1476 && coro->slot
1477 && !PL_dirty)
1478 {
1479 struct coro temp;
1480
1481 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1482
1483 save_perl (aTHX_ &temp);
1484 load_perl (aTHX_ coro);
1485
1486 coro_destruct_perl (aTHX_ coro);
1487
1488 load_perl (aTHX_ &temp);
1489
1490 coro->slot = 0;
1491 }
1492
1493 cctx_destroy (coro->cctx);
1494 SvREFCNT_dec (coro->startcv);
1495 SvREFCNT_dec (coro->args);
1496 SvREFCNT_dec (CORO_THROW);
1497
1498 if (coro->next) coro->next->prev = coro->prev;
1499 if (coro->prev) coro->prev->next = coro->next;
1500 if (coro == coro_first) coro_first = coro->next;
1501
1502 return 1;
1503}
1504
1505static int
1506coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1507{
1508 struct coro *coro = (struct coro *)mg->mg_ptr;
1509 mg->mg_ptr = 0;
1510
1511 coro->hv = 0;
1512
1513 if (--coro->refcnt < 0)
1514 {
1515 coro_state_destroy (aTHX_ coro);
1516 Safefree (coro);
1517 }
1518
1519 return 0;
1520}
1521
1522static int
1523coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1524{
1525 struct coro *coro = (struct coro *)mg->mg_ptr;
1526
1527 ++coro->refcnt;
1528
1529 return 0;
1530}
1531
1532static MGVTBL coro_state_vtbl = {
1533 0, 0, 0, 0,
1534 coro_state_free,
1535 0,
1536#ifdef MGf_DUP
1537 coro_state_dup,
1538#else
1539# define MGf_DUP 0
1540#endif
1541};
1542
1543static void
1544prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1545{
1546 ta->prev = SvSTATE (prev_sv);
1547 ta->next = SvSTATE (next_sv);
1548 TRANSFER_CHECK (*ta);
1549}
1550
1551static void
1552api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1553{
1554 struct coro_transfer_args ta;
1555
1556 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1557 TRANSFER (ta, 1);
1558}
1559
1560/*****************************************************************************/
1561/* gensub: simple closure generation utility */
1562
1563#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1564
1565/* create a closure from XS, returns a code reference */
1566/* the arg can be accessed via GENSUB_ARG from the callback */
1567/* the callback must use dXSARGS/XSRETURN */
1568static SV *
1569gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1570{
1571 CV *cv = (CV *)newSV (0);
1572
1573 sv_upgrade ((SV *)cv, SVt_PVCV);
1574
1575 CvANON_on (cv);
1576 CvISXSUB_on (cv);
1577 CvXSUB (cv) = xsub;
1578 GENSUB_ARG = arg;
1579
1580 return newRV_noinc ((SV *)cv);
1581}
1582
1583/** Coro ********************************************************************/
1584
1585INLINE void
1586coro_enq (pTHX_ struct coro *coro)
1587{
1588 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1589}
1590
1591INLINE SV *
1592coro_deq (pTHX)
1593{
1594 int prio;
1595
901 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1596 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
902 if (AvFILLp (coro_ready [prio]) >= 0) 1597 if (AvFILLp (coro_ready [prio]) >= 0)
903 {
904 coro_nready--;
905 return av_shift (coro_ready [prio]); 1598 return av_shift (coro_ready [prio]);
906 }
907 1599
908 return 0; 1600 return 0;
909} 1601}
910 1602
911static int 1603static int
912api_ready (SV *coro_sv) 1604api_ready (pTHX_ SV *coro_sv)
913{ 1605{
914 struct coro *coro; 1606 struct coro *coro;
915 1607 SV *sv_hook;
916 if (SvROK (coro_sv)) 1608 void (*xs_hook)(void);
917 coro_sv = SvRV (coro_sv);
918 1609
919 coro = SvSTATE (coro_sv); 1610 coro = SvSTATE (coro_sv);
920 1611
921 if (coro->flags & CF_READY) 1612 if (coro->flags & CF_READY)
922 return 0; 1613 return 0;
923 1614
1615 coro->flags |= CF_READY;
1616
1617 sv_hook = coro_nready ? 0 : coro_readyhook;
1618 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1619
1620 coro_enq (aTHX_ coro);
1621 ++coro_nready;
1622
1623 if (sv_hook)
1624 {
1625 dSP;
1626
1627 ENTER;
1628 SAVETMPS;
1629
1630 PUSHMARK (SP);
1631 PUTBACK;
1632 call_sv (sv_hook, G_VOID | G_DISCARD);
1633
1634 FREETMPS;
1635 LEAVE;
1636 }
1637
1638 if (xs_hook)
1639 xs_hook ();
1640
1641 return 1;
1642}
1643
1644static int
1645api_is_ready (pTHX_ SV *coro_sv)
1646{
1647 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1648}
1649
1650/* expects to own a reference to next->hv */
1651INLINE void
1652prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1653{
1654 SV *prev_sv = SvRV (coro_current);
1655
1656 ta->prev = SvSTATE_hv (prev_sv);
1657 ta->next = next;
1658
1659 TRANSFER_CHECK (*ta);
1660
1661 SvRV_set (coro_current, (SV *)next->hv);
1662
1663 free_coro_mortal (aTHX);
1664 coro_mortal = prev_sv;
1665}
1666
1667static void
1668prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1669{
1670 for (;;)
1671 {
1672 SV *next_sv = coro_deq (aTHX);
1673
1674 if (expect_true (next_sv))
1675 {
1676 struct coro *next = SvSTATE_hv (next_sv);
1677
1678 /* cannot transfer to destroyed coros, skip and look for next */
1679 if (expect_false (next->flags & CF_DESTROYED))
1680 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1681 else
1682 {
1683 next->flags &= ~CF_READY;
1684 --coro_nready;
1685
1686 prepare_schedule_to (aTHX_ ta, next);
1687 break;
1688 }
1689 }
1690 else
1691 {
1692 /* nothing to schedule: call the idle handler */
1693 if (SvROK (sv_idle)
1694 && SvOBJECT (SvRV (sv_idle)))
1695 {
1696 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1697 api_ready (aTHX_ SvRV (sv_idle));
1698 --coro_nready;
1699 }
1700 else
1701 {
1702 dSP;
1703
1704 ENTER;
1705 SAVETMPS;
1706
1707 PUSHMARK (SP);
1708 PUTBACK;
1709 call_sv (sv_idle, G_VOID | G_DISCARD);
1710
1711 FREETMPS;
1712 LEAVE;
1713 }
1714 }
1715 }
1716}
1717
1718INLINE void
1719prepare_cede (pTHX_ struct coro_transfer_args *ta)
1720{
1721 api_ready (aTHX_ coro_current);
1722 prepare_schedule (aTHX_ ta);
1723}
1724
1725INLINE void
1726prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1727{
1728 SV *prev = SvRV (coro_current);
1729
1730 if (coro_nready)
1731 {
1732 prepare_schedule (aTHX_ ta);
1733 api_ready (aTHX_ prev);
1734 }
1735 else
1736 prepare_nop (aTHX_ ta);
1737}
1738
1739static void
1740api_schedule (pTHX)
1741{
1742 struct coro_transfer_args ta;
1743
1744 prepare_schedule (aTHX_ &ta);
1745 TRANSFER (ta, 1);
1746}
1747
1748static void
1749api_schedule_to (pTHX_ SV *coro_sv)
1750{
1751 struct coro_transfer_args ta;
1752 struct coro *next = SvSTATE (coro_sv);
1753
1754 SvREFCNT_inc_NN (coro_sv);
1755 prepare_schedule_to (aTHX_ &ta, next);
1756}
1757
1758static int
1759api_cede (pTHX)
1760{
1761 struct coro_transfer_args ta;
1762
1763 prepare_cede (aTHX_ &ta);
1764
1765 if (expect_true (ta.prev != ta.next))
1766 {
1767 TRANSFER (ta, 1);
1768 return 1;
1769 }
1770 else
1771 return 0;
1772}
1773
1774static int
1775api_cede_notself (pTHX)
1776{
1777 if (coro_nready)
1778 {
1779 struct coro_transfer_args ta;
1780
1781 prepare_cede_notself (aTHX_ &ta);
1782 TRANSFER (ta, 1);
1783 return 1;
1784 }
1785 else
1786 return 0;
1787}
1788
1789static void
1790api_trace (pTHX_ SV *coro_sv, int flags)
1791{
1792 struct coro *coro = SvSTATE (coro_sv);
1793
924 if (coro->flags & CF_RUNNING) 1794 if (coro->flags & CF_RUNNING)
925 croak ("Coro::ready called on currently running coroutine"); 1795 croak ("cannot enable tracing on a running coroutine, caught");
926 1796
927 coro->flags |= CF_READY; 1797 if (flags & CC_TRACE)
1798 {
1799 if (!coro->cctx)
1800 coro->cctx = cctx_new_run ();
1801 else if (!(coro->cctx->flags & CC_TRACE))
1802 croak ("cannot enable tracing on coroutine with custom stack, caught");
928 1803
929 LOCK; 1804 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
930 coro_enq (SvREFCNT_inc (coro_sv)); 1805 }
931 UNLOCK; 1806 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1807 {
1808 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
932 1809
933 return 1; 1810 if (coro->flags & CF_RUNNING)
1811 PL_runops = RUNOPS_DEFAULT;
1812 else
1813 coro->slot->runops = RUNOPS_DEFAULT;
1814 }
934} 1815}
1816
1817static void
1818coro_call_on_destroy (pTHX_ struct coro *coro)
1819{
1820 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1821 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1822
1823 if (on_destroyp)
1824 {
1825 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1826
1827 while (AvFILLp (on_destroy) >= 0)
1828 {
1829 dSP; /* don't disturb outer sp */
1830 SV *cb = av_pop (on_destroy);
1831
1832 PUSHMARK (SP);
1833
1834 if (statusp)
1835 {
1836 int i;
1837 AV *status = (AV *)SvRV (*statusp);
1838 EXTEND (SP, AvFILLp (status) + 1);
1839
1840 for (i = 0; i <= AvFILLp (status); ++i)
1841 PUSHs (AvARRAY (status)[i]);
1842 }
1843
1844 PUTBACK;
1845 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1846 }
1847 }
1848}
1849
1850static void
1851slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 int i;
1854 HV *hv = (HV *)SvRV (coro_current);
1855 AV *av = newAV ();
1856
1857 av_extend (av, items - 1);
1858 for (i = 0; i < items; ++i)
1859 av_push (av, SvREFCNT_inc_NN (arg [i]));
1860
1861 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1862
1863 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1864 api_ready (aTHX_ sv_manager);
1865
1866 frame->prepare = prepare_schedule;
1867 frame->check = slf_check_repeat;
1868}
1869
1870/*****************************************************************************/
1871/* async pool handler */
935 1872
936static int 1873static int
937api_is_ready (SV *coro_sv) 1874slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
938{ 1875{
939 return !!SvSTATE (coro_sv)->flags & CF_READY; 1876 HV *hv = (HV *)SvRV (coro_current);
940} 1877 struct coro *coro = (struct coro *)frame->data;
941 1878
942static void 1879 if (!coro->invoke_cb)
943prepare_schedule (struct transfer_args *ta) 1880 return 1; /* loop till we have invoke */
944{ 1881 else
945 SV *current, *prev, *next;
946
947 current = GvSV (coro_current);
948
949 for (;;)
950 { 1882 {
951 LOCK; 1883 hv_store (hv, "desc", sizeof ("desc") - 1,
952 next = coro_deq (PRIO_MIN); 1884 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
953 UNLOCK;
954 1885
955 if (next) 1886 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
956 break;
957 1887
958 { 1888 {
959 dSP; 1889 dSP;
960 1890 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
961 ENTER;
962 SAVETMPS;
963
964 PUSHMARK (SP);
965 PUTBACK; 1891 PUTBACK;
966 call_sv (GvSV (coro_idle), G_DISCARD);
967
968 FREETMPS;
969 LEAVE;
970 } 1892 }
1893
1894 SvREFCNT_dec (GvAV (PL_defgv));
1895 GvAV (PL_defgv) = coro->invoke_av;
1896 coro->invoke_av = 0;
1897
1898 return 0;
1899 }
1900}
1901
1902static void
1903slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 HV *hv = (HV *)SvRV (coro_current);
1906 struct coro *coro = SvSTATE_hv ((SV *)hv);
1907
1908 if (expect_true (coro->saved_deffh))
971 } 1909 {
1910 /* subsequent iteration */
1911 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1912 coro->saved_deffh = 0;
972 1913
973 prev = SvRV (current); 1914 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
974 SvRV (current) = next; 1915 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1916 {
1917 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1918 coro->invoke_av = newAV ();
975 1919
976 /* free this only after the transfer */ 1920 frame->prepare = prepare_nop;
977 LOCK; 1921 }
978 free_coro_mortal (); 1922 else
979 UNLOCK; 1923 {
980 coro_mortal = prev; 1924 av_clear (GvAV (PL_defgv));
1925 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
981 1926
982 ta->prev = SvSTATE (prev); 1927 coro->prio = 0;
983 ta->next = SvSTATE (next);
984 ta->flags = TRANSFER_SAVE_ALL;
985 1928
986 ta->next->flags &= ~CF_READY; 1929 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
987} 1930 api_trace (aTHX_ coro_current, 0);
988 1931
1932 frame->prepare = prepare_schedule;
1933 av_push (av_async_pool, SvREFCNT_inc (hv));
1934 }
1935 }
1936 else
1937 {
1938 /* first iteration, simply fall through */
1939 frame->prepare = prepare_nop;
1940 }
1941
1942 frame->check = slf_check_pool_handler;
1943 frame->data = (void *)coro;
1944}
1945
1946/*****************************************************************************/
1947/* rouse callback */
1948
1949#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1950
1951static void
1952coro_rouse_callback (pTHX_ CV *cv)
1953{
1954 dXSARGS;
1955 SV *data = (SV *)GENSUB_ARG;
1956
1957 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1958 {
1959 /* first call, set args */
1960 AV *av = newAV ();
1961 SV *coro = SvRV (data);
1962
1963 SvRV_set (data, (SV *)av);
1964 api_ready (aTHX_ coro);
1965 SvREFCNT_dec (coro);
1966
1967 /* better take a full copy of the arguments */
1968 while (items--)
1969 av_store (av, items, newSVsv (ST (items)));
1970 }
1971
1972 XSRETURN_EMPTY;
1973}
1974
989static void 1975static int
1976slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1977{
1978 SV *data = (SV *)frame->data;
1979
1980 if (CORO_THROW)
1981 return 0;
1982
1983 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1984 return 1;
1985
1986 /* now push all results on the stack */
1987 {
1988 dSP;
1989 AV *av = (AV *)SvRV (data);
1990 int i;
1991
1992 EXTEND (SP, AvFILLp (av) + 1);
1993 for (i = 0; i <= AvFILLp (av); ++i)
1994 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1995
1996 /* we have stolen the elements, so ste length to zero and free */
1997 AvFILLp (av) = -1;
1998 av_undef (av);
1999
2000 PUTBACK;
2001 }
2002
2003 return 0;
2004}
2005
2006static void
2007slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2008{
2009 SV *cb;
2010
2011 if (items)
2012 cb = arg [0];
2013 else
2014 {
2015 struct coro *coro = SvSTATE_current;
2016
2017 if (!coro->rouse_cb)
2018 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2019
2020 cb = sv_2mortal (coro->rouse_cb);
2021 coro->rouse_cb = 0;
2022 }
2023
2024 if (!SvROK (cb)
2025 || SvTYPE (SvRV (cb)) != SVt_PVCV
2026 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2027 croak ("Coro::rouse_wait called with illegal callback argument,");
2028
2029 {
2030 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2031 SV *data = (SV *)GENSUB_ARG;
2032
2033 frame->data = (void *)data;
2034 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2035 frame->check = slf_check_rouse_wait;
2036 }
2037}
2038
2039static SV *
2040coro_new_rouse_cb (pTHX)
2041{
2042 HV *hv = (HV *)SvRV (coro_current);
2043 struct coro *coro = SvSTATE_hv (hv);
2044 SV *data = newRV_inc ((SV *)hv);
2045 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2046
2047 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2048 SvREFCNT_dec (data); /* magicext increases the refcount */
2049
2050 SvREFCNT_dec (coro->rouse_cb);
2051 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2052
2053 return cb;
2054}
2055
2056/*****************************************************************************/
2057/* schedule-like-function opcode (SLF) */
2058
2059static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2060static const CV *slf_cv;
2061static SV **slf_argv;
2062static int slf_argc, slf_arga; /* count, allocated */
2063static I32 slf_ax; /* top of stack, for restore */
2064
2065/* this restores the stack in the case we patched the entersub, to */
2066/* recreate the stack frame as perl will on following calls */
2067/* since entersub cleared the stack */
2068static OP *
2069pp_restore (pTHX)
2070{
2071 int i;
2072 SV **SP = PL_stack_base + slf_ax;
2073
2074 PUSHMARK (SP);
2075
2076 EXTEND (SP, slf_argc + 1);
2077
2078 for (i = 0; i < slf_argc; ++i)
2079 PUSHs (sv_2mortal (slf_argv [i]));
2080
2081 PUSHs ((SV *)CvGV (slf_cv));
2082
2083 RETURNOP (slf_restore.op_first);
2084}
2085
2086static void
2087slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2088{
2089 SV **arg = (SV **)slf_frame.data;
2090
2091 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2092}
2093
2094static void
2095slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 if (items != 2)
2098 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2099
2100 frame->prepare = slf_prepare_transfer;
2101 frame->check = slf_check_nop;
2102 frame->data = (void *)arg; /* let's hope it will stay valid */
2103}
2104
2105static void
2106slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2107{
2108 frame->prepare = prepare_schedule;
2109 frame->check = slf_check_nop;
2110}
2111
2112static void
990prepare_cede (struct transfer_args *ta) 2113slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
991{ 2114{
2115 struct coro *next = (struct coro *)slf_frame.data;
2116
2117 SvREFCNT_inc_NN (next->hv);
2118 prepare_schedule_to (aTHX_ ta, next);
2119}
2120
2121static void
2122slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2123{
2124 if (!items)
2125 croak ("Coro::schedule_to expects a coroutine argument, caught");
2126
2127 frame->data = (void *)SvSTATE (arg [0]);
2128 frame->prepare = slf_prepare_schedule_to;
2129 frame->check = slf_check_nop;
2130}
2131
2132static void
2133slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2134{
992 api_ready (GvSV (coro_current)); 2135 api_ready (aTHX_ SvRV (coro_current));
993 2136
994 prepare_schedule (ta); 2137 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
995} 2138}
996 2139
997static void 2140static void
998api_schedule (void) 2141slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
999{ 2142{
1000 dTHX; 2143 frame->prepare = prepare_cede;
2144 frame->check = slf_check_nop;
2145}
2146
2147static void
2148slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2149{
2150 frame->prepare = prepare_cede_notself;
2151 frame->check = slf_check_nop;
2152}
2153
2154/*
2155 * these not obviously related functions are all rolled into one
2156 * function to increase chances that they all will call transfer with the same
2157 * stack offset
2158 * SLF stands for "schedule-like-function".
2159 */
2160static OP *
2161pp_slf (pTHX)
2162{
2163 I32 checkmark; /* mark SP to see how many elements check has pushed */
2164
2165 /* set up the slf frame, unless it has already been set-up */
2166 /* the latter happens when a new coro has been started */
2167 /* or when a new cctx was attached to an existing coroutine */
2168 if (expect_true (!slf_frame.prepare))
2169 {
2170 /* first iteration */
2171 dSP;
2172 SV **arg = PL_stack_base + TOPMARK + 1;
2173 int items = SP - arg; /* args without function object */
2174 SV *gv = *sp;
2175
2176 /* do a quick consistency check on the "function" object, and if it isn't */
2177 /* for us, divert to the real entersub */
2178 if (SvTYPE (gv) != SVt_PVGV
2179 || !GvCV (gv)
2180 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2181 return PL_ppaddr[OP_ENTERSUB](aTHX);
2182
2183 if (!(PL_op->op_flags & OPf_STACKED))
2184 {
2185 /* ampersand-form of call, use @_ instead of stack */
2186 AV *av = GvAV (PL_defgv);
2187 arg = AvARRAY (av);
2188 items = AvFILLp (av) + 1;
2189 }
2190
2191 /* now call the init function, which needs to set up slf_frame */
2192 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2193 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2194
2195 /* pop args */
2196 SP = PL_stack_base + POPMARK;
2197
2198 PUTBACK;
2199 }
2200
2201 /* now that we have a slf_frame, interpret it! */
2202 /* we use a callback system not to make the code needlessly */
2203 /* complicated, but so we can run multiple perl coros from one cctx */
2204
2205 do
2206 {
1001 struct transfer_args ta; 2207 struct coro_transfer_args ta;
1002 2208
1003 prepare_schedule (&ta); 2209 slf_frame.prepare (aTHX_ &ta);
1004 TRANSFER (ta); 2210 TRANSFER (ta, 0);
1005}
1006 2211
2212 checkmark = PL_stack_sp - PL_stack_base;
2213 }
2214 while (slf_frame.check (aTHX_ &slf_frame));
2215
2216 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2217
2218 /* exception handling */
2219 if (expect_false (CORO_THROW))
2220 {
2221 SV *exception = sv_2mortal (CORO_THROW);
2222
2223 CORO_THROW = 0;
2224 sv_setsv (ERRSV, exception);
2225 croak (0);
2226 }
2227
2228 /* return value handling - mostly like entersub */
2229 /* make sure we put something on the stack in scalar context */
2230 if (GIMME_V == G_SCALAR)
2231 {
2232 dSP;
2233 SV **bot = PL_stack_base + checkmark;
2234
2235 if (sp == bot) /* too few, push undef */
2236 bot [1] = &PL_sv_undef;
2237 else if (sp != bot + 1) /* too many, take last one */
2238 bot [1] = *sp;
2239
2240 SP = bot + 1;
2241
2242 PUTBACK;
2243 }
2244
2245 return NORMAL;
2246}
2247
2248static void
2249api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2250{
2251 int i;
2252 SV **arg = PL_stack_base + ax;
2253 int items = PL_stack_sp - arg + 1;
2254
2255 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2256
2257 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2258 && PL_op->op_ppaddr != pp_slf)
2259 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2260
2261 CvFLAGS (cv) |= CVf_SLF;
2262 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2263 slf_cv = cv;
2264
2265 /* we patch the op, and then re-run the whole call */
2266 /* we have to put the same argument on the stack for this to work */
2267 /* and this will be done by pp_restore */
2268 slf_restore.op_next = (OP *)&slf_restore;
2269 slf_restore.op_type = OP_CUSTOM;
2270 slf_restore.op_ppaddr = pp_restore;
2271 slf_restore.op_first = PL_op;
2272
2273 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2274
2275 if (PL_op->op_flags & OPf_STACKED)
2276 {
2277 if (items > slf_arga)
2278 {
2279 slf_arga = items;
2280 free (slf_argv);
2281 slf_argv = malloc (slf_arga * sizeof (SV *));
2282 }
2283
2284 slf_argc = items;
2285
2286 for (i = 0; i < items; ++i)
2287 slf_argv [i] = SvREFCNT_inc (arg [i]);
2288 }
2289 else
2290 slf_argc = 0;
2291
2292 PL_op->op_ppaddr = pp_slf;
2293 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2294
2295 PL_op = (OP *)&slf_restore;
2296}
2297
2298/*****************************************************************************/
2299/* PerlIO::cede */
2300
2301typedef struct
2302{
2303 PerlIOBuf base;
2304 NV next, every;
2305} PerlIOCede;
2306
2307static IV
2308PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2309{
2310 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2311
2312 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2313 self->next = nvtime () + self->every;
2314
2315 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2316}
2317
2318static SV *
2319PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2320{
2321 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2322
2323 return newSVnv (self->every);
2324}
2325
2326static IV
2327PerlIOCede_flush (pTHX_ PerlIO *f)
2328{
2329 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2330 double now = nvtime ();
2331
2332 if (now >= self->next)
2333 {
2334 api_cede (aTHX);
2335 self->next = now + self->every;
2336 }
2337
2338 return PerlIOBuf_flush (aTHX_ f);
2339}
2340
2341static PerlIO_funcs PerlIO_cede =
2342{
2343 sizeof(PerlIO_funcs),
2344 "cede",
2345 sizeof(PerlIOCede),
2346 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2347 PerlIOCede_pushed,
2348 PerlIOBuf_popped,
2349 PerlIOBuf_open,
2350 PerlIOBase_binmode,
2351 PerlIOCede_getarg,
2352 PerlIOBase_fileno,
2353 PerlIOBuf_dup,
2354 PerlIOBuf_read,
2355 PerlIOBuf_unread,
2356 PerlIOBuf_write,
2357 PerlIOBuf_seek,
2358 PerlIOBuf_tell,
2359 PerlIOBuf_close,
2360 PerlIOCede_flush,
2361 PerlIOBuf_fill,
2362 PerlIOBase_eof,
2363 PerlIOBase_error,
2364 PerlIOBase_clearerr,
2365 PerlIOBase_setlinebuf,
2366 PerlIOBuf_get_base,
2367 PerlIOBuf_bufsiz,
2368 PerlIOBuf_get_ptr,
2369 PerlIOBuf_get_cnt,
2370 PerlIOBuf_set_ptrcnt,
2371};
2372
2373/*****************************************************************************/
2374/* Coro::Semaphore & Coro::Signal */
2375
2376static SV *
2377coro_waitarray_new (pTHX_ int count)
2378{
2379 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2380 AV *av = newAV ();
2381 SV **ary;
2382
2383 /* unfortunately, building manually saves memory */
2384 Newx (ary, 2, SV *);
2385 AvALLOC (av) = ary;
2386#if PERL_VERSION_ATLEAST (5,10,0)
2387 AvARRAY (av) = ary;
2388#else
2389 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2390 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2391 SvPVX ((SV *)av) = (char *)ary;
2392#endif
2393 AvMAX (av) = 1;
2394 AvFILLp (av) = 0;
2395 ary [0] = newSViv (count);
2396
2397 return newRV_noinc ((SV *)av);
2398}
2399
2400/* semaphore */
2401
2402static void
2403coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2404{
2405 SV *count_sv = AvARRAY (av)[0];
2406 IV count = SvIVX (count_sv);
2407
2408 count += adjust;
2409 SvIVX (count_sv) = count;
2410
2411 /* now wake up as many waiters as are expected to lock */
2412 while (count > 0 && AvFILLp (av) > 0)
2413 {
2414 SV *cb;
2415
2416 /* swap first two elements so we can shift a waiter */
2417 AvARRAY (av)[0] = AvARRAY (av)[1];
2418 AvARRAY (av)[1] = count_sv;
2419 cb = av_shift (av);
2420
2421 if (SvOBJECT (cb))
2422 {
2423 api_ready (aTHX_ cb);
2424 --count;
2425 }
2426 else if (SvTYPE (cb) == SVt_PVCV)
2427 {
2428 dSP;
2429 PUSHMARK (SP);
2430 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2431 PUTBACK;
2432 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2433 }
2434
2435 SvREFCNT_dec (cb);
2436 }
2437}
2438
2439static void
2440coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2441{
2442 /* call $sem->adjust (0) to possibly wake up some other waiters */
2443 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2444}
2445
1007static void 2446static int
1008api_cede (void) 2447slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1009{ 2448{
1010 dTHX; 2449 AV *av = (AV *)frame->data;
1011 struct transfer_args ta; 2450 SV *count_sv = AvARRAY (av)[0];
1012 2451
1013 prepare_cede (&ta); 2452 /* if we are about to throw, don't actually acquire the lock, just throw */
1014 TRANSFER (ta); 2453 if (CORO_THROW)
1015} 2454 return 0;
2455 else if (SvIVX (count_sv) > 0)
2456 {
2457 SvSTATE_current->on_destroy = 0;
1016 2458
2459 if (acquire)
2460 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2461 else
2462 coro_semaphore_adjust (aTHX_ av, 0);
2463
2464 return 0;
2465 }
2466 else
2467 {
2468 int i;
2469 /* if we were woken up but can't down, we look through the whole */
2470 /* waiters list and only add us if we aren't in there already */
2471 /* this avoids some degenerate memory usage cases */
2472
2473 for (i = 1; i <= AvFILLp (av); ++i)
2474 if (AvARRAY (av)[i] == SvRV (coro_current))
2475 return 1;
2476
2477 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2478 return 1;
2479 }
2480}
2481
2482static int
2483slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2484{
2485 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2486}
2487
2488static int
2489slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2490{
2491 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2492}
2493
2494static void
2495slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2496{
2497 AV *av = (AV *)SvRV (arg [0]);
2498
2499 if (SvIVX (AvARRAY (av)[0]) > 0)
2500 {
2501 frame->data = (void *)av;
2502 frame->prepare = prepare_nop;
2503 }
2504 else
2505 {
2506 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2507
2508 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2509 frame->prepare = prepare_schedule;
2510
2511 /* to avoid race conditions when a woken-up coro gets terminated */
2512 /* we arrange for a temporary on_destroy that calls adjust (0) */
2513 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2514 }
2515}
2516
2517static void
2518slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2519{
2520 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2521 frame->check = slf_check_semaphore_down;
2522}
2523
2524static void
2525slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2526{
2527 if (items >= 2)
2528 {
2529 /* callback form */
2530 AV *av = (AV *)SvRV (arg [0]);
2531 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2532
2533 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2534
2535 if (SvIVX (AvARRAY (av)[0]) > 0)
2536 coro_semaphore_adjust (aTHX_ av, 0);
2537
2538 frame->prepare = prepare_nop;
2539 frame->check = slf_check_nop;
2540 }
2541 else
2542 {
2543 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2544 frame->check = slf_check_semaphore_wait;
2545 }
2546}
2547
2548/* signal */
2549
2550static void
2551coro_signal_wake (pTHX_ AV *av, int count)
2552{
2553 SvIVX (AvARRAY (av)[0]) = 0;
2554
2555 /* now signal count waiters */
2556 while (count > 0 && AvFILLp (av) > 0)
2557 {
2558 SV *cb;
2559
2560 /* swap first two elements so we can shift a waiter */
2561 cb = AvARRAY (av)[0];
2562 AvARRAY (av)[0] = AvARRAY (av)[1];
2563 AvARRAY (av)[1] = cb;
2564
2565 cb = av_shift (av);
2566
2567 api_ready (aTHX_ cb);
2568 sv_setiv (cb, 0); /* signal waiter */
2569 SvREFCNT_dec (cb);
2570
2571 --count;
2572 }
2573}
2574
2575static int
2576slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2577{
2578 /* if we are about to throw, also stop waiting */
2579 return SvROK ((SV *)frame->data) && !CORO_THROW;
2580}
2581
2582static void
2583slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2584{
2585 AV *av = (AV *)SvRV (arg [0]);
2586
2587 if (SvIVX (AvARRAY (av)[0]))
2588 {
2589 SvIVX (AvARRAY (av)[0]) = 0;
2590 frame->prepare = prepare_nop;
2591 frame->check = slf_check_nop;
2592 }
2593 else
2594 {
2595 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2596
2597 av_push (av, waiter);
2598
2599 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2600 frame->prepare = prepare_schedule;
2601 frame->check = slf_check_signal_wait;
2602 }
2603}
2604
2605/*****************************************************************************/
2606/* Coro::AIO */
2607
2608#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2609
2610/* helper storage struct */
2611struct io_state
2612{
2613 int errorno;
2614 I32 laststype; /* U16 in 5.10.0 */
2615 int laststatval;
2616 Stat_t statcache;
2617};
2618
2619static void
2620coro_aio_callback (pTHX_ CV *cv)
2621{
2622 dXSARGS;
2623 AV *state = (AV *)GENSUB_ARG;
2624 SV *coro = av_pop (state);
2625 SV *data_sv = newSV (sizeof (struct io_state));
2626
2627 av_extend (state, items - 1);
2628
2629 sv_upgrade (data_sv, SVt_PV);
2630 SvCUR_set (data_sv, sizeof (struct io_state));
2631 SvPOK_only (data_sv);
2632
2633 {
2634 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2635
2636 data->errorno = errno;
2637 data->laststype = PL_laststype;
2638 data->laststatval = PL_laststatval;
2639 data->statcache = PL_statcache;
2640 }
2641
2642 /* now build the result vector out of all the parameters and the data_sv */
2643 {
2644 int i;
2645
2646 for (i = 0; i < items; ++i)
2647 av_push (state, SvREFCNT_inc_NN (ST (i)));
2648 }
2649
2650 av_push (state, data_sv);
2651
2652 api_ready (aTHX_ coro);
2653 SvREFCNT_dec (coro);
2654 SvREFCNT_dec ((AV *)state);
2655}
2656
2657static int
2658slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2659{
2660 AV *state = (AV *)frame->data;
2661
2662 /* if we are about to throw, return early */
2663 /* this does not cancel the aio request, but at least */
2664 /* it quickly returns */
2665 if (CORO_THROW)
2666 return 0;
2667
2668 /* one element that is an RV? repeat! */
2669 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2670 return 1;
2671
2672 /* restore status */
2673 {
2674 SV *data_sv = av_pop (state);
2675 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2676
2677 errno = data->errorno;
2678 PL_laststype = data->laststype;
2679 PL_laststatval = data->laststatval;
2680 PL_statcache = data->statcache;
2681
2682 SvREFCNT_dec (data_sv);
2683 }
2684
2685 /* push result values */
2686 {
2687 dSP;
2688 int i;
2689
2690 EXTEND (SP, AvFILLp (state) + 1);
2691 for (i = 0; i <= AvFILLp (state); ++i)
2692 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2693
2694 PUTBACK;
2695 }
2696
2697 return 0;
2698}
2699
2700static void
2701slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2702{
2703 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2704 SV *coro_hv = SvRV (coro_current);
2705 struct coro *coro = SvSTATE_hv (coro_hv);
2706
2707 /* put our coroutine id on the state arg */
2708 av_push (state, SvREFCNT_inc_NN (coro_hv));
2709
2710 /* first see whether we have a non-zero priority and set it as AIO prio */
2711 if (coro->prio)
2712 {
2713 dSP;
2714
2715 static SV *prio_cv;
2716 static SV *prio_sv;
2717
2718 if (expect_false (!prio_cv))
2719 {
2720 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2721 prio_sv = newSViv (0);
2722 }
2723
2724 PUSHMARK (SP);
2725 sv_setiv (prio_sv, coro->prio);
2726 XPUSHs (prio_sv);
2727
2728 PUTBACK;
2729 call_sv (prio_cv, G_VOID | G_DISCARD);
2730 }
2731
2732 /* now call the original request */
2733 {
2734 dSP;
2735 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2736 int i;
2737
2738 PUSHMARK (SP);
2739
2740 /* first push all args to the stack */
2741 EXTEND (SP, items + 1);
2742
2743 for (i = 0; i < items; ++i)
2744 PUSHs (arg [i]);
2745
2746 /* now push the callback closure */
2747 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2748
2749 /* now call the AIO function - we assume our request is uncancelable */
2750 PUTBACK;
2751 call_sv ((SV *)req, G_VOID | G_DISCARD);
2752 }
2753
2754 /* now that the requets is going, we loop toll we have a result */
2755 frame->data = (void *)state;
2756 frame->prepare = prepare_schedule;
2757 frame->check = slf_check_aio_req;
2758}
2759
2760static void
2761coro_aio_req_xs (pTHX_ CV *cv)
2762{
2763 dXSARGS;
2764
2765 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2766
2767 XSRETURN_EMPTY;
2768}
2769
2770/*****************************************************************************/
2771
2772#if CORO_CLONE
2773# include "clone.c"
2774#endif
2775
1017MODULE = Coro::State PACKAGE = Coro::State 2776MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018 2777
1019PROTOTYPES: DISABLE 2778PROTOTYPES: DISABLE
1020 2779
1021BOOT: 2780BOOT:
1022{ 2781{
1023#ifdef USE_ITHREADS 2782#ifdef USE_ITHREADS
1024 MUTEX_INIT (&coro_mutex); 2783# if CORO_PTHREAD
2784 coro_thx = PERL_GET_CONTEXT;
2785# endif
1025#endif 2786#endif
1026 BOOT_PAGESIZE; 2787 BOOT_PAGESIZE;
1027 2788
2789 cctx_current = cctx_new_empty ();
2790
2791 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2792 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2793
2794 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2795 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2796 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2797
2798 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2799 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2800 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2801
1028 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2802 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029 2803
1030 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2804 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2805 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2806 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2807 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033 2808
1034 main_mainstack = PL_mainstack; 2809 main_mainstack = PL_mainstack;
2810 main_top_env = PL_top_env;
1035 2811
2812 while (main_top_env->je_prev)
2813 main_top_env = main_top_env->je_prev;
2814
2815 {
2816 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2817
2818 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2819 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2820
2821 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2822 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2823 }
2824
1036 coroapi.ver = CORO_API_VERSION; 2825 coroapi.ver = CORO_API_VERSION;
2826 coroapi.rev = CORO_API_REVISION;
2827
1037 coroapi.transfer = api_transfer; 2828 coroapi.transfer = api_transfer;
2829
2830 coroapi.sv_state = SvSTATE_;
2831 coroapi.execute_slf = api_execute_slf;
2832 coroapi.prepare_nop = prepare_nop;
2833 coroapi.prepare_schedule = prepare_schedule;
2834 coroapi.prepare_cede = prepare_cede;
2835 coroapi.prepare_cede_notself = prepare_cede_notself;
2836
2837 {
2838 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2839
2840 if (!svp) croak ("Time::HiRes is required");
2841 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2842
2843 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2844 }
1038 2845
1039 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2846 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1040} 2847}
1041 2848
1042SV * 2849SV *
1043new (char *klass, ...) 2850new (char *klass, ...)
2851 ALIAS:
2852 Coro::new = 1
1044 CODE: 2853 CODE:
1045{ 2854{
1046 struct coro *coro; 2855 struct coro *coro;
2856 MAGIC *mg;
1047 HV *hv; 2857 HV *hv;
2858 CV *cb;
1048 int i; 2859 int i;
1049 2860
2861 if (items > 1)
2862 {
2863 cb = coro_sv_2cv (aTHX_ ST (1));
2864
2865 if (!ix)
2866 {
2867 if (CvISXSUB (cb))
2868 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2869
2870 if (!CvROOT (cb))
2871 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2872 }
2873 }
2874
1050 Newz (0, coro, 1, struct coro); 2875 Newz (0, coro, 1, struct coro);
1051 coro->args = newAV (); 2876 coro->args = newAV ();
2877 coro->flags = CF_NEW;
1052 2878
2879 if (coro_first) coro_first->prev = coro;
2880 coro->next = coro_first;
2881 coro_first = coro;
2882
1053 hv = newHV (); 2883 coro->hv = hv = newHV ();
1054 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2884 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2885 mg->mg_flags |= MGf_DUP;
1055 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2886 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056 2887
2888 if (items > 1)
2889 {
2890 av_extend (coro->args, items - 1 + ix - 1);
2891
2892 if (ix)
2893 {
2894 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2895 cb = cv_coro_run;
2896 }
2897
2898 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2899
1057 for (i = 1; i < items; i++) 2900 for (i = 2; i < items; i++)
1058 av_push (coro->args, newSVsv (ST (i))); 2901 av_push (coro->args, newSVsv (ST (i)));
2902 }
1059} 2903}
1060 OUTPUT: 2904 OUTPUT:
1061 RETVAL 2905 RETVAL
1062 2906
1063void 2907void
1064_set_stacklevel (...) 2908transfer (...)
1065 ALIAS: 2909 PROTOTYPE: $$
1066 Coro::State::transfer = 1 2910 CODE:
1067 Coro::schedule = 2 2911 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1068 Coro::cede = 3
1069 Coro::Cont::yield = 4
1070 CODE:
1071{
1072 struct transfer_args ta;
1073 2912
1074 switch (ix) 2913bool
1075 { 2914_destroy (SV *coro_sv)
1076 case 0: 2915 CODE:
1077 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2916 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1078 ta.next = 0; 2917 OUTPUT:
1079 ta.flags = TRANSFER_SET_STACKLEVEL; 2918 RETVAL
1080 break;
1081
1082 case 1:
1083 if (items != 3)
1084 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1085
1086 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1087 break;
1088
1089 case 2:
1090 prepare_schedule (&ta);
1091 break;
1092
1093 case 3:
1094 prepare_cede (&ta);
1095 break;
1096
1097 case 4:
1098 {
1099 SV *yieldstack;
1100 SV *sv;
1101 AV *defav = GvAV (PL_defgv);
1102
1103 yieldstack = *hv_fetch (
1104 (HV *)SvRV (GvSV (coro_current)),
1105 "yieldstack", sizeof ("yieldstack") - 1,
1106 0
1107 );
1108
1109 /* set up @_ -- ugly */
1110 av_clear (defav);
1111 av_fill (defav, items - 1);
1112 while (items--)
1113 av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115 sv = av_pop ((AV *)SvRV (yieldstack));
1116 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118 ta.flags = 0;
1119 SvREFCNT_dec (sv);
1120 }
1121 break;
1122
1123 }
1124
1125 TRANSFER (ta);
1126}
1127 2919
1128void 2920void
1129_clone_state_from (SV *dst, SV *src)
1130 CODE:
1131{
1132 struct coro *coro_src = SvSTATE (src);
1133
1134 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136 ++coro_src->refcnt;
1137 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138}
1139
1140void
1141_exit (code) 2921_exit (int code)
1142 int code
1143 PROTOTYPE: $ 2922 PROTOTYPE: $
1144 CODE: 2923 CODE:
1145 _exit (code); 2924 _exit (code);
1146 2925
2926SV *
2927clone (Coro::State coro)
2928 CODE:
2929{
2930#if CORO_CLONE
2931 struct coro *ncoro = coro_clone (aTHX_ coro);
2932 MAGIC *mg;
2933 /* TODO: too much duplication */
2934 ncoro->hv = newHV ();
2935 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2936 mg->mg_flags |= MGf_DUP;
2937 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2938#else
2939 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2940#endif
2941}
2942 OUTPUT:
2943 RETVAL
2944
2945int
2946cctx_stacksize (int new_stacksize = 0)
2947 PROTOTYPE: ;$
2948 CODE:
2949 RETVAL = cctx_stacksize;
2950 if (new_stacksize)
2951 {
2952 cctx_stacksize = new_stacksize;
2953 ++cctx_gen;
2954 }
2955 OUTPUT:
2956 RETVAL
2957
2958int
2959cctx_max_idle (int max_idle = 0)
2960 PROTOTYPE: ;$
2961 CODE:
2962 RETVAL = cctx_max_idle;
2963 if (max_idle > 1)
2964 cctx_max_idle = max_idle;
2965 OUTPUT:
2966 RETVAL
2967
1147int 2968int
1148cctx_count () 2969cctx_count ()
2970 PROTOTYPE:
1149 CODE: 2971 CODE:
1150 RETVAL = cctx_count; 2972 RETVAL = cctx_count;
1151 OUTPUT: 2973 OUTPUT:
1152 RETVAL 2974 RETVAL
1153 2975
1154int 2976int
1155cctx_idle () 2977cctx_idle ()
2978 PROTOTYPE:
1156 CODE: 2979 CODE:
1157 RETVAL = cctx_idle; 2980 RETVAL = cctx_idle;
1158 OUTPUT: 2981 OUTPUT:
1159 RETVAL 2982 RETVAL
1160 2983
2984void
2985list ()
2986 PROTOTYPE:
2987 PPCODE:
2988{
2989 struct coro *coro;
2990 for (coro = coro_first; coro; coro = coro->next)
2991 if (coro->hv)
2992 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2993}
2994
2995void
2996call (Coro::State coro, SV *coderef)
2997 ALIAS:
2998 eval = 1
2999 CODE:
3000{
3001 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3002 {
3003 struct coro temp;
3004
3005 if (!(coro->flags & CF_RUNNING))
3006 {
3007 PUTBACK;
3008 save_perl (aTHX_ &temp);
3009 load_perl (aTHX_ coro);
3010 }
3011
3012 {
3013 dSP;
3014 ENTER;
3015 SAVETMPS;
3016 PUTBACK;
3017 PUSHSTACK;
3018 PUSHMARK (SP);
3019
3020 if (ix)
3021 eval_sv (coderef, 0);
3022 else
3023 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3024
3025 POPSTACK;
3026 SPAGAIN;
3027 FREETMPS;
3028 LEAVE;
3029 PUTBACK;
3030 }
3031
3032 if (!(coro->flags & CF_RUNNING))
3033 {
3034 save_perl (aTHX_ coro);
3035 load_perl (aTHX_ &temp);
3036 SPAGAIN;
3037 }
3038 }
3039}
3040
3041SV *
3042is_ready (Coro::State coro)
3043 PROTOTYPE: $
3044 ALIAS:
3045 is_ready = CF_READY
3046 is_running = CF_RUNNING
3047 is_new = CF_NEW
3048 is_destroyed = CF_DESTROYED
3049 CODE:
3050 RETVAL = boolSV (coro->flags & ix);
3051 OUTPUT:
3052 RETVAL
3053
3054void
3055throw (Coro::State self, SV *throw = &PL_sv_undef)
3056 PROTOTYPE: $;$
3057 CODE:
3058{
3059 struct coro *current = SvSTATE_current;
3060 SV **throwp = self == current ? &CORO_THROW : &self->except;
3061 SvREFCNT_dec (*throwp);
3062 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3063}
3064
3065void
3066api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3067 PROTOTYPE: $;$
3068 C_ARGS: aTHX_ coro, flags
3069
3070SV *
3071has_cctx (Coro::State coro)
3072 PROTOTYPE: $
3073 CODE:
3074 /* maybe manage the running flag differently */
3075 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3076 OUTPUT:
3077 RETVAL
3078
3079int
3080is_traced (Coro::State coro)
3081 PROTOTYPE: $
3082 CODE:
3083 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3084 OUTPUT:
3085 RETVAL
3086
3087UV
3088rss (Coro::State coro)
3089 PROTOTYPE: $
3090 ALIAS:
3091 usecount = 1
3092 CODE:
3093 switch (ix)
3094 {
3095 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3096 case 1: RETVAL = coro->usecount; break;
3097 }
3098 OUTPUT:
3099 RETVAL
3100
3101void
3102force_cctx ()
3103 PROTOTYPE:
3104 CODE:
3105 cctx_current->idle_sp = 0;
3106
3107void
3108swap_defsv (Coro::State self)
3109 PROTOTYPE: $
3110 ALIAS:
3111 swap_defav = 1
3112 CODE:
3113 if (!self->slot)
3114 croak ("cannot swap state with coroutine that has no saved state,");
3115 else
3116 {
3117 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3118 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3119
3120 SV *tmp = *src; *src = *dst; *dst = tmp;
3121 }
3122
3123
1161MODULE = Coro::State PACKAGE = Coro 3124MODULE = Coro::State PACKAGE = Coro
1162 3125
1163BOOT: 3126BOOT:
1164{ 3127{
1165 int i; 3128 int i;
1166 3129
3130 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3131 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3132 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3133 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3134 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3135 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3136 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3137 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3138 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3139
3140 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3141 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3142 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3143 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3144
1167 coro_stash = gv_stashpv ("Coro", TRUE); 3145 coro_stash = gv_stashpv ("Coro", TRUE);
1168 3146
1169 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175 3153
1176 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3154 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180 coro_ready[i] = newAV (); 3155 coro_ready[i] = newAV ();
1181 3156
1182 { 3157 {
1183 SV *sv = perl_get_sv("Coro::API", 1); 3158 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1184 3159
1185 coroapi.schedule = api_schedule; 3160 coroapi.schedule = api_schedule;
3161 coroapi.schedule_to = api_schedule_to;
1186 coroapi.cede = api_cede; 3162 coroapi.cede = api_cede;
3163 coroapi.cede_notself = api_cede_notself;
1187 coroapi.ready = api_ready; 3164 coroapi.ready = api_ready;
1188 coroapi.is_ready = api_is_ready; 3165 coroapi.is_ready = api_is_ready;
1189 coroapi.nready = &coro_nready; 3166 coroapi.nready = coro_nready;
1190 coroapi.current = coro_current; 3167 coroapi.current = coro_current;
1191 3168
1192 GCoroAPI = &coroapi; 3169 /*GCoroAPI = &coroapi;*/
1193 sv_setiv (sv, (IV)&coroapi); 3170 sv_setiv (sv, (IV)&coroapi);
1194 SvREADONLY_on (sv); 3171 SvREADONLY_on (sv);
1195 } 3172 }
1196} 3173}
1197 3174
3175void
3176terminate (...)
3177 CODE:
3178 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3179
3180void
3181schedule (...)
3182 CODE:
3183 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3184
3185void
3186schedule_to (...)
3187 CODE:
3188 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3189
3190void
3191cede_to (...)
3192 CODE:
3193 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3194
3195void
3196cede (...)
3197 CODE:
3198 CORO_EXECUTE_SLF_XS (slf_init_cede);
3199
3200void
3201cede_notself (...)
3202 CODE:
3203 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3204
3205void
3206_cancel (Coro::State self)
3207 CODE:
3208 coro_state_destroy (aTHX_ self);
3209 coro_call_on_destroy (aTHX_ self);
3210
3211void
3212_set_current (SV *current)
3213 PROTOTYPE: $
3214 CODE:
3215 SvREFCNT_dec (SvRV (coro_current));
3216 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3217
3218void
3219_set_readyhook (SV *hook)
3220 PROTOTYPE: $
3221 CODE:
3222 SvREFCNT_dec (coro_readyhook);
3223 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3224
1198int 3225int
1199prio (Coro::State coro, int newprio = 0) 3226prio (Coro::State coro, int newprio = 0)
3227 PROTOTYPE: $;$
1200 ALIAS: 3228 ALIAS:
1201 nice = 1 3229 nice = 1
1202 CODE: 3230 CODE:
1203{ 3231{
1204 RETVAL = coro->prio; 3232 RETVAL = coro->prio;
1205 3233
1206 if (items > 1) 3234 if (items > 1)
1207 { 3235 {
1208 if (ix) 3236 if (ix)
1209 newprio += coro->prio; 3237 newprio = coro->prio - newprio;
1210 3238
1211 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3239 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3240 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213 3241
1214 coro->prio = newprio; 3242 coro->prio = newprio;
1215 } 3243 }
1216} 3244}
3245 OUTPUT:
3246 RETVAL
1217 3247
1218SV * 3248SV *
1219ready (SV *self) 3249ready (SV *self)
1220 PROTOTYPE: $ 3250 PROTOTYPE: $
1221 CODE: 3251 CODE:
1222 RETVAL = boolSV (api_ready (self)); 3252 RETVAL = boolSV (api_ready (aTHX_ self));
1223 OUTPUT:
1224 RETVAL
1225
1226SV *
1227is_ready (SV *self)
1228 PROTOTYPE: $
1229 CODE:
1230 RETVAL = boolSV (api_is_ready (self));
1231 OUTPUT: 3253 OUTPUT:
1232 RETVAL 3254 RETVAL
1233 3255
1234int 3256int
1235nready (...) 3257nready (...)
… …
1237 CODE: 3259 CODE:
1238 RETVAL = coro_nready; 3260 RETVAL = coro_nready;
1239 OUTPUT: 3261 OUTPUT:
1240 RETVAL 3262 RETVAL
1241 3263
1242MODULE = Coro::State PACKAGE = Coro::AIO 3264void
3265_pool_handler (...)
3266 CODE:
3267 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3268
3269void
3270async_pool (SV *cv, ...)
3271 PROTOTYPE: &@
3272 PPCODE:
3273{
3274 HV *hv = (HV *)av_pop (av_async_pool);
3275 AV *av = newAV ();
3276 SV *cb = ST (0);
3277 int i;
3278
3279 av_extend (av, items - 2);
3280 for (i = 1; i < items; ++i)
3281 av_push (av, SvREFCNT_inc_NN (ST (i)));
3282
3283 if ((SV *)hv == &PL_sv_undef)
3284 {
3285 PUSHMARK (SP);
3286 EXTEND (SP, 2);
3287 PUSHs (sv_Coro);
3288 PUSHs ((SV *)cv_pool_handler);
3289 PUTBACK;
3290 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3291 SPAGAIN;
3292
3293 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3294 }
3295
3296 {
3297 struct coro *coro = SvSTATE_hv (hv);
3298
3299 assert (!coro->invoke_cb);
3300 assert (!coro->invoke_av);
3301 coro->invoke_cb = SvREFCNT_inc (cb);
3302 coro->invoke_av = av;
3303 }
3304
3305 api_ready (aTHX_ (SV *)hv);
3306
3307 if (GIMME_V != G_VOID)
3308 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3309 else
3310 SvREFCNT_dec (hv);
3311}
1243 3312
1244SV * 3313SV *
1245_get_state () 3314rouse_cb ()
3315 PROTOTYPE:
1246 CODE: 3316 CODE:
1247{ 3317 RETVAL = coro_new_rouse_cb (aTHX);
1248 struct {
1249 int errorno;
1250 int laststype;
1251 int laststatval;
1252 Stat_t statcache;
1253 } data;
1254
1255 data.errorno = errno;
1256 data.laststype = PL_laststype;
1257 data.laststatval = PL_laststatval;
1258 data.statcache = PL_statcache;
1259
1260 RETVAL = newSVpvn ((char *)&data, sizeof data);
1261}
1262 OUTPUT: 3318 OUTPUT:
1263 RETVAL 3319 RETVAL
1264 3320
1265void 3321void
1266_set_state (char *data_) 3322rouse_wait (...)
1267 PROTOTYPE: $ 3323 PROTOTYPE: ;$
3324 PPCODE:
3325 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3326
3327
3328MODULE = Coro::State PACKAGE = PerlIO::cede
3329
3330BOOT:
3331 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3332
3333
3334MODULE = Coro::State PACKAGE = Coro::Semaphore
3335
3336SV *
3337new (SV *klass, SV *count = 0)
1268 CODE: 3338 CODE:
3339 RETVAL = sv_bless (
3340 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3341 GvSTASH (CvGV (cv))
3342 );
3343 OUTPUT:
3344 RETVAL
3345
3346# helper for Coro::Channel
3347SV *
3348_alloc (int count)
3349 CODE:
3350 RETVAL = coro_waitarray_new (aTHX_ count);
3351 OUTPUT:
3352 RETVAL
3353
3354SV *
3355count (SV *self)
3356 CODE:
3357 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3358 OUTPUT:
3359 RETVAL
3360
3361void
3362up (SV *self, int adjust = 1)
3363 ALIAS:
3364 adjust = 1
3365 CODE:
3366 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3367
3368void
3369down (...)
3370 CODE:
3371 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3372
3373void
3374wait (...)
3375 CODE:
3376 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3377
3378void
3379try (SV *self)
3380 PPCODE:
1269{ 3381{
1270 struct { 3382 AV *av = (AV *)SvRV (self);
3383 SV *count_sv = AvARRAY (av)[0];
3384 IV count = SvIVX (count_sv);
3385
3386 if (count > 0)
3387 {
3388 --count;
3389 SvIVX (count_sv) = count;
3390 XSRETURN_YES;
3391 }
3392 else
3393 XSRETURN_NO;
3394}
3395
3396void
3397waiters (SV *self)
3398 PPCODE:
3399{
3400 AV *av = (AV *)SvRV (self);
3401 int wcount = AvFILLp (av) + 1 - 1;
3402
3403 if (GIMME_V == G_SCALAR)
3404 XPUSHs (sv_2mortal (newSViv (wcount)));
3405 else
3406 {
1271 int errorno; 3407 int i;
1272 int laststype; 3408 EXTEND (SP, wcount);
1273 int laststatval; 3409 for (i = 1; i <= wcount; ++i)
1274 Stat_t statcache; 3410 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1275 } *data = (void *)data_; 3411 }
1276
1277 errno = data->errorno;
1278 PL_laststype = data->laststype;
1279 PL_laststatval = data->laststatval;
1280 PL_statcache = data->statcache;
1281} 3412}
3413
3414MODULE = Coro::State PACKAGE = Coro::Signal
3415
3416SV *
3417new (SV *klass)
3418 CODE:
3419 RETVAL = sv_bless (
3420 coro_waitarray_new (aTHX_ 0),
3421 GvSTASH (CvGV (cv))
3422 );
3423 OUTPUT:
3424 RETVAL
3425
3426void
3427wait (...)
3428 CODE:
3429 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3430
3431void
3432broadcast (SV *self)
3433 CODE:
3434{
3435 AV *av = (AV *)SvRV (self);
3436 coro_signal_wake (aTHX_ av, AvFILLp (av));
3437}
3438
3439void
3440send (SV *self)
3441 CODE:
3442{
3443 AV *av = (AV *)SvRV (self);
3444
3445 if (AvFILLp (av))
3446 coro_signal_wake (aTHX_ av, 1);
3447 else
3448 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3449}
3450
3451IV
3452awaited (SV *self)
3453 CODE:
3454 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3455 OUTPUT:
3456 RETVAL
3457
3458
3459MODULE = Coro::State PACKAGE = Coro::AnyEvent
3460
3461BOOT:
3462 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3463
3464void
3465_schedule (...)
3466 CODE:
3467{
3468 static int incede;
3469
3470 api_cede_notself (aTHX);
3471
3472 ++incede;
3473 while (coro_nready >= incede && api_cede (aTHX))
3474 ;
3475
3476 sv_setsv (sv_activity, &PL_sv_undef);
3477 if (coro_nready >= incede)
3478 {
3479 PUSHMARK (SP);
3480 PUTBACK;
3481 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3482 }
3483
3484 --incede;
3485}
3486
3487
3488MODULE = Coro::State PACKAGE = Coro::AIO
3489
3490void
3491_register (char *target, char *proto, SV *req)
3492 CODE:
3493{
3494 CV *req_cv = coro_sv_2cv (aTHX_ req);
3495 /* newXSproto doesn't return the CV on 5.8 */
3496 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3497 sv_setpv ((SV *)slf_cv, proto);
3498 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3499}
3500

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