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Comparing Coro/Coro/State.xs (file contents):
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs.
Revision 1.349 by root, Wed Jun 10 00:47:24 2009 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 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
48 61
49#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr 63# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
52# endif 65# endif
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 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
70/* 5.8.7 */ 110/* 5.8.7 */
71#ifndef SvRV_set 111#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 113#endif
74 114
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 116# undef CORO_STACKGUARD
77#endif 117#endif
78 118
79#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 120# define CORO_STACKGUARD 0
81#endif 121#endif
82 122
83/* prefer perl internal functions over our own? */ 123/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 124#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 126#endif
87 127
88/* The next macro should declare a variable stacklevel that contains and approximation 128/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 129 * portable way as possible. */
90 * and should be unique. */ 130#if __GNUC__ >= 4
91#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
92#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
93 137
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
95 139
96#if __GNUC__ >= 3 140#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
99#else 144#else
100# define attribute(x) 145# define attribute(x)
101# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
102#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
103 152
104#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
105 154
106#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
107 157
108#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
109static perl_mutex coro_mutex; 159# if CORO_PTHREAD
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 161# endif
162#endif
116 163
117struct io_state 164static double (*nvtime)(); /* so why doesn't it take void? */
118{
119 int errorno;
120 I32 laststype;
121 int laststatval;
122 Stat_t statcache;
123};
124 165
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;
125static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
126static 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;
127static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
128static 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;
129 199
130static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
132 202
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
133/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 213typedef struct coro_cctx
214{
135 struct coro_cctx *next; 215 struct coro_cctx *next;
136 216
137 /* the stack */ 217 /* the stack */
138 void *sptr; 218 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
140 220
141 /* cpu state */ 221 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
143 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
144 JMPENV *top_env; 224 JMPENV *top_env;
145 coro_context cctx; 225 coro_context cctx;
146 226
147 int inuse; 227 U32 gen;
148
149#if USE_VALGRIND 228#if CORO_USE_VALGRIND
150 int valgrind_id; 229 int valgrind_id;
151#endif 230#endif
231 unsigned char flags;
152} coro_cctx; 232} coro_cctx;
153 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
154enum { 238enum {
155 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
156 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
157 CF_NEW = 0x0004, /* ahs never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
158}; 244};
159 245
160/* this is a structure representing a perl-level coroutine */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
161struct coro { 247typedef struct
162 /* the c coroutine allocated to this perl coroutine, if any */ 248{
163 coro_cctx *cctx; 249 SV *defsv;
164 250 AV *defav;
165 /* data associated with this coroutine (initial args) */ 251 SV *errsv;
166 AV *args; 252 SV *irsgv;
167 int refcnt; 253 HV *hinthv;
168 int save; /* CORO_SAVE flags */
169 int flags; /* CF_ flags */
170
171 /* optionally saved, might be zero */
172 AV *defav; /* @_ */
173 SV *defsv; /* $_ */
174 SV *errsv; /* $@ */
175 SV *irssv; /* $/ */
176 SV *irssv_sv; /* real $/ cache */
177
178#define VAR(name,type) type name; 254#define VAR(name,type) type name;
179# include "state.h" 255# include "state.h"
180#undef VAR 256#undef VAR
257} perl_slots;
258
259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
260
261/* this is a structure representing a perl-level coroutine */
262struct coro {
263 /* the C coroutine allocated to this perl coroutine, if any */
264 coro_cctx *cctx;
265
266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
271 AV *mainstack;
272 perl_slots *slot; /* basically the saved sp */
273
274 CV *startcv; /* the CV to execute */
275 AV *args; /* data associated with this coroutine (initial args) */
276 int refcnt; /* coroutines are refcounted, yes */
277 int flags; /* CF_ flags */
278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
280
281 /* statistics */
282 int usecount; /* number of transfers to this coro */
181 283
182 /* coro process data */ 284 /* coro process data */
183 int prio; 285 int prio;
286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
288
289 /* async_pool */
290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
297
298 /* linked list */
299 struct coro *next, *prev;
184}; 300};
185 301
186typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
187typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
188 304
189static AV * 305/* the following variables are effectively part of the perl context */
190coro_clone_padlist (CV *cv) 306/* and get copied between struct coro and these variables */
191{ 307/* the mainr easonw e don't support windows process emulation */
192 AV *padlist = CvPADLIST (cv); 308static struct CoroSLF slf_frame; /* the current slf frame */
193 AV *newpadlist, *newpad;
194
195 newpadlist = newAV ();
196 AvREAL_off (newpadlist);
197#if PERL_VERSION_ATLEAST (5,9,0)
198 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
199#else
200 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
201#endif
202 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
203 --AvFILLp (padlist);
204
205 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
206 av_store (newpadlist, 1, (SV *)newpad);
207
208 return newpadlist;
209}
210
211static void
212free_padlist (AV *padlist)
213{
214 /* may be during global destruction */
215 if (SvREFCNT (padlist))
216 {
217 I32 i = AvFILLp (padlist);
218 while (i >= 0)
219 {
220 SV **svp = av_fetch (padlist, i--, FALSE);
221 if (svp)
222 {
223 SV *sv;
224 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
225 SvREFCNT_dec (sv);
226
227 SvREFCNT_dec (*svp);
228 }
229 }
230
231 SvREFCNT_dec ((SV*)padlist);
232 }
233}
234
235static int
236coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
237{
238 AV *padlist;
239 AV *av = (AV *)mg->mg_obj;
240
241 /* casting is fun. */
242 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
243 free_padlist (padlist);
244
245 SvREFCNT_dec (av);
246
247 return 0;
248}
249
250#define PERL_MAGIC_coro PERL_MAGIC_ext
251
252static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
253
254#define CORO_MAGIC(cv) \
255 SvMAGIC (cv) \
256 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
257 ? SvMAGIC (cv) \
258 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
259 : 0
260
261/* the next two functions merely cache the padlists */
262static void
263get_padlist (CV *cv)
264{
265 MAGIC *mg = CORO_MAGIC (cv);
266 AV *av;
267
268 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
269 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
270 else
271 {
272#if PREFER_PERL_FUNCTIONS
273 /* this is probably cleaner, but also slower? */
274 CV *cp = Perl_cv_clone (cv);
275 CvPADLIST (cv) = CvPADLIST (cp);
276 CvPADLIST (cp) = 0;
277 SvREFCNT_dec (cp);
278#else
279 CvPADLIST (cv) = coro_clone_padlist (cv);
280#endif
281 }
282}
283
284static void
285put_padlist (CV *cv)
286{
287 MAGIC *mg = CORO_MAGIC (cv);
288 AV *av;
289
290 if (!mg)
291 {
292 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
293 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
294 mg->mg_virtual = &vtbl_coro;
295 mg->mg_obj = (SV *)newAV ();
296 }
297
298 av = (AV *)mg->mg_obj;
299
300 if (AvFILLp (av) >= AvMAX (av))
301 av_extend (av, AvMAX (av) + 1);
302
303 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
304}
305
306#define SB do {
307#define SE } while (0)
308
309#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
310
311static void
312load_perl (Coro__State c)
313{
314#define VAR(name,type) PL_ ## name = c->name;
315# include "state.h"
316#undef VAR
317
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321 if (c->irssv)
322 {
323 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
324 SvREFCNT_dec (c->irssv);
325 else
326 {
327 REPLACE_SV (PL_rs, c->irssv);
328 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
329 sv_setsv (c->irssv_sv, PL_rs);
330 }
331 }
332
333 {
334 dSP;
335 CV *cv;
336
337 /* now do the ugly restore mess */
338 while ((cv = (CV *)POPs))
339 {
340 put_padlist (cv); /* mark this padlist as available */
341 CvDEPTH (cv) = PTR2IV (POPs);
342 CvPADLIST (cv) = (AV *)POPs;
343 }
344
345 PUTBACK;
346 }
347}
348
349static void
350save_perl (Coro__State c)
351{
352 {
353 dSP;
354 I32 cxix = cxstack_ix;
355 PERL_CONTEXT *ccstk = cxstack;
356 PERL_SI *top_si = PL_curstackinfo;
357
358 /*
359 * the worst thing you can imagine happens first - we have to save
360 * (and reinitialize) all cv's in the whole callchain :(
361 */
362
363 EXTEND (SP, 3 + 1);
364 PUSHs (Nullsv);
365 /* this loop was inspired by pp_caller */
366 for (;;)
367 {
368 while (cxix >= 0)
369 {
370 PERL_CONTEXT *cx = &ccstk[cxix--];
371
372 if (CxTYPE (cx) == CXt_SUB)
373 {
374 CV *cv = cx->blk_sub.cv;
375
376 if (CvDEPTH (cv))
377 {
378 EXTEND (SP, 3);
379 PUSHs ((SV *)CvPADLIST (cv));
380 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381 PUSHs ((SV *)cv);
382
383 CvDEPTH (cv) = 0;
384 get_padlist (cv);
385 }
386 }
387 }
388
389 if (top_si->si_type == PERLSI_MAIN)
390 break;
391
392 top_si = top_si->si_prev;
393 ccstk = top_si->si_cxstack;
394 cxix = top_si->si_cxix;
395 }
396
397 PUTBACK;
398 }
399
400 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
401 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
403 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
404
405#define VAR(name,type)c->name = PL_ ## name;
406# include "state.h"
407#undef VAR
408}
409
410/*
411 * allocate various perl stacks. This is an exact copy
412 * of perl.c:init_stacks, except that it uses less memory
413 * on the (sometimes correct) assumption that coroutines do
414 * not usually need a lot of stackspace.
415 */
416#if PREFER_PERL_FUNCTIONS
417# define coro_init_stacks init_stacks
418#else
419static void
420coro_init_stacks ()
421{
422 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
423 PL_curstackinfo->si_type = PERLSI_MAIN;
424 PL_curstack = PL_curstackinfo->si_stack;
425 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
426
427 PL_stack_base = AvARRAY(PL_curstack);
428 PL_stack_sp = PL_stack_base;
429 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
430
431 New(50,PL_tmps_stack,128,SV*);
432 PL_tmps_floor = -1;
433 PL_tmps_ix = -1;
434 PL_tmps_max = 128;
435
436 New(54,PL_markstack,32,I32);
437 PL_markstack_ptr = PL_markstack;
438 PL_markstack_max = PL_markstack + 32;
439
440#ifdef SET_MARK_OFFSET
441 SET_MARK_OFFSET;
442#endif
443
444 New(54,PL_scopestack,32,I32);
445 PL_scopestack_ix = 0;
446 PL_scopestack_max = 32;
447
448 New(54,PL_savestack,64,ANY);
449 PL_savestack_ix = 0;
450 PL_savestack_max = 64;
451
452#if !PERL_VERSION_ATLEAST (5,9,0)
453 New(54,PL_retstack,16,OP*);
454 PL_retstack_ix = 0;
455 PL_retstack_max = 16;
456#endif
457}
458#endif
459
460/*
461 * destroy the stacks, the callchain etc...
462 */
463static void
464coro_destroy_stacks ()
465{
466 if (!IN_DESTRUCT)
467 {
468 /* restore all saved variables and stuff */
469 LEAVE_SCOPE (0);
470 assert (PL_tmps_floor == -1);
471
472 /* free all temporaries */
473 FREETMPS;
474 assert (PL_tmps_ix == -1);
475
476 POPSTACK_TO (PL_mainstack);
477 }
478
479 while (PL_curstackinfo->si_next)
480 PL_curstackinfo = PL_curstackinfo->si_next;
481
482 while (PL_curstackinfo)
483 {
484 PERL_SI *p = PL_curstackinfo->si_prev;
485
486 if (!IN_DESTRUCT)
487 SvREFCNT_dec (PL_curstackinfo->si_stack);
488
489 Safefree (PL_curstackinfo->si_cxstack);
490 Safefree (PL_curstackinfo);
491 PL_curstackinfo = p;
492 }
493
494 Safefree (PL_tmps_stack);
495 Safefree (PL_markstack);
496 Safefree (PL_scopestack);
497 Safefree (PL_savestack);
498#if !PERL_VERSION_ATLEAST (5,9,0)
499 Safefree (PL_retstack);
500#endif
501}
502
503static void
504setup_coro (struct coro *coro)
505{
506 /*
507 * emulate part of the perl startup here.
508 */
509
510 coro_init_stacks ();
511
512 PL_curcop = &PL_compiling;
513 PL_in_eval = EVAL_NULL;
514 PL_curpm = 0;
515 PL_localizing = 0;
516 PL_dirty = 0;
517 PL_restartop = 0;
518
519 {
520 dSP;
521 LOGOP myop;
522
523 SvREFCNT_dec (GvAV (PL_defgv));
524 GvAV (PL_defgv) = coro->args; coro->args = 0;
525
526 Zero (&myop, 1, LOGOP);
527 myop.op_next = Nullop;
528 myop.op_flags = OPf_WANT_VOID;
529
530 PUSHMARK (SP);
531 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
532 PUTBACK;
533 PL_op = (OP *)&myop;
534 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535 SPAGAIN;
536 }
537
538 ENTER; /* necessary e.g. for dounwind */
539}
540
541static void
542free_coro_mortal ()
543{
544 if (coro_mortal)
545 {
546 SvREFCNT_dec (coro_mortal);
547 coro_mortal = 0;
548 }
549}
550
551/* inject a fake call to Coro::State::_cctx_init into the execution */
552static void NOINLINE
553prepare_cctx (coro_cctx *cctx)
554{
555 dSP;
556 LOGOP myop;
557
558 Zero (&myop, 1, LOGOP);
559 myop.op_next = PL_op;
560 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561
562 PUSHMARK (SP);
563 EXTEND (SP, 2);
564 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
565 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
566 PUTBACK;
567 PL_op = (OP *)&myop;
568 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
569 SPAGAIN;
570}
571
572static void
573coro_run (void *arg)
574{
575 /* coro_run is the alternative tail of transfer(), so unlock here. */
576 UNLOCK;
577
578 /*
579 * this is a _very_ stripped down perl interpreter ;)
580 */
581 PL_top_env = &PL_start_env;
582
583 /* inject call to cctx_init */
584 prepare_cctx ((coro_cctx *)arg);
585
586 /* somebody will hit me for both perl_run and PL_restartop */
587 PL_restartop = PL_op;
588 perl_run (PL_curinterp);
589
590 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
591 abort ();
592}
593
594static coro_cctx *
595cctx_new ()
596{
597 coro_cctx *cctx;
598
599 ++cctx_count;
600
601 Newz (0, cctx, 1, coro_cctx);
602
603#if HAVE_MMAP
604
605 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
606 /* mmap supposedly does allocate-on-write for us */
607 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
608
609 if (cctx->sptr == (void *)-1)
610 {
611 perror ("FATAL: unable to mmap stack for coroutine");
612 _exit (EXIT_FAILURE);
613 }
614
615# if STACKGUARD
616 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
617# endif
618
619#else
620
621 cctx->ssize = STACKSIZE * (long)sizeof (long);
622 New (0, cctx->sptr, STACKSIZE, long);
623
624 if (!cctx->sptr)
625 {
626 perror ("FATAL: unable to malloc stack for coroutine");
627 _exit (EXIT_FAILURE);
628 }
629
630#endif
631
632#if USE_VALGRIND
633 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
634 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
635 cctx->ssize + (char *)cctx->sptr
636 );
637#endif
638
639 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
640
641 return cctx;
642}
643
644static void
645cctx_destroy (coro_cctx *cctx)
646{
647 if (!cctx)
648 return;
649
650 --cctx_count;
651
652#if USE_VALGRIND
653 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
654#endif
655
656#if HAVE_MMAP
657 munmap (cctx->sptr, cctx->ssize);
658#else
659 Safefree (cctx->sptr);
660#endif
661
662 Safefree (cctx);
663}
664
665static coro_cctx *
666cctx_get ()
667{
668 coro_cctx *cctx;
669
670 if (cctx_first)
671 {
672 cctx = cctx_first;
673 cctx_first = cctx->next;
674 --cctx_idle;
675 }
676 else
677 {
678 cctx = cctx_new ();
679 PL_op = PL_op->op_next;
680 }
681
682 return cctx;
683}
684
685static void
686cctx_put (coro_cctx *cctx)
687{
688 /* free another cctx if overlimit */
689 if (cctx_idle >= MAX_IDLE_CCTX)
690 {
691 coro_cctx *first = cctx_first;
692 cctx_first = first->next;
693 --cctx_idle;
694
695 assert (!first->inuse);
696 cctx_destroy (first);
697 }
698
699 ++cctx_idle;
700 cctx->next = cctx_first;
701 cctx_first = cctx;
702}
703
704/* never call directly, always through the coro_state_transfer global variable */
705static void NOINLINE
706transfer (struct coro *prev, struct coro *next)
707{
708 dSTACKLEVEL;
709
710 /* sometimes transfer is only called to set idle_sp */
711 if (!next)
712 {
713 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
714 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
715 }
716 else if (prev != next)
717 {
718 coro_cctx *prev__cctx;
719
720 if (prev->flags & CF_NEW)
721 {
722 /* create a new empty context */
723 Newz (0, prev->cctx, 1, coro_cctx);
724 prev->cctx->inuse = 1;
725 prev->flags &= ~CF_NEW;
726 prev->flags |= CF_RUNNING;
727 }
728
729 /*TODO: must not croak here */
730 if (!prev->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
732
733 if (next->flags & CF_RUNNING)
734 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
735
736 prev->flags &= ~CF_RUNNING;
737 next->flags |= CF_RUNNING;
738
739 LOCK;
740
741 if (next->flags & CF_NEW)
742 {
743 /* need to start coroutine */
744 next->flags &= ~CF_NEW;
745 /* first get rid of the old state */
746 save_perl (prev);
747 /* setup coroutine call */
748 setup_coro (next);
749 /* need a new stack */
750 assert (!next->cctx);
751 }
752 else
753 {
754 /* coroutine already started */
755 save_perl (prev);
756 load_perl (next);
757 }
758
759 prev__cctx = prev->cctx;
760
761 /* possibly "free" the cctx */
762 if (prev__cctx->idle_sp == STACKLEVEL)
763 {
764 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
765 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
766
767 prev->cctx = 0;
768
769 cctx_put (prev__cctx);
770 prev__cctx->inuse = 0;
771 }
772
773 if (!next->cctx)
774 {
775 next->cctx = cctx_get ();
776 assert (!next->cctx->inuse);
777 next->cctx->inuse = 1;
778 }
779
780 if (prev__cctx != next->cctx)
781 {
782 prev__cctx->top_env = PL_top_env;
783 PL_top_env = next->cctx->top_env;
784 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
785 }
786
787 free_coro_mortal ();
788
789 UNLOCK;
790 }
791}
792
793struct transfer_args
794{
795 struct coro *prev, *next;
796};
797
798#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
799
800static void
801coro_state_destroy (struct coro *coro)
802{
803 if (coro->refcnt--)
804 return;
805
806 if (coro->mainstack && coro->mainstack != main_mainstack)
807 {
808 struct coro temp;
809 Zero (&temp, 1, struct coro);
810 temp.save = CORO_SAVE_ALL;
811
812 if (coro->flags & CF_RUNNING)
813 croak ("FATAL: tried to destroy currently running coroutine");
814
815 save_perl (&temp);
816 load_perl (coro);
817
818 coro_destroy_stacks ();
819
820 load_perl (&temp); /* this will get rid of defsv etc.. */
821
822 coro->mainstack = 0;
823 }
824
825 cctx_destroy (coro->cctx);
826 SvREFCNT_dec (coro->args);
827 Safefree (coro);
828}
829
830static int
831coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
832{
833 struct coro *coro = (struct coro *)mg->mg_ptr;
834 mg->mg_ptr = 0;
835
836 coro_state_destroy (coro);
837
838 return 0;
839}
840
841static int
842coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
843{
844 struct coro *coro = (struct coro *)mg->mg_ptr;
845
846 ++coro->refcnt;
847
848 return 0;
849}
850
851static MGVTBL coro_state_vtbl = {
852 0, 0, 0, 0,
853 coro_state_clear,
854 0,
855#ifdef MGf_DUP
856 coro_state_dup,
857#else
858# define MGf_DUP 0
859#endif
860};
861
862static struct coro *
863SvSTATE (SV *coro)
864{
865 HV *stash;
866 MAGIC *mg;
867
868 if (SvROK (coro))
869 coro = SvRV (coro);
870
871 stash = SvSTASH (coro);
872 if (stash != coro_stash && stash != coro_state_stash)
873 {
874 /* very slow, but rare, check */
875 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
876 croak ("Coro::State object required");
877 }
878
879 mg = SvMAGIC (coro);
880 assert (mg->mg_type == PERL_MAGIC_ext);
881 return (struct coro *)mg->mg_ptr;
882}
883
884static void
885prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
886{
887 ta->prev = SvSTATE (prev_sv);
888 ta->next = SvSTATE (next_sv);
889}
890
891static void
892api_transfer (SV *prev_sv, SV *next_sv)
893{
894 struct transfer_args ta;
895
896 prepare_transfer (&ta, prev_sv, next_sv);
897 TRANSFER (ta);
898}
899
900static int
901api_save (SV *coro_sv, int new_save)
902{
903 struct coro *coro = SvSTATE (coro_sv);
904 int old_save = coro->save;
905
906 if (new_save >= 0)
907 coro->save = new_save;
908
909 return old_save;
910}
911 309
912/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
913 311
914#define PRIO_MAX 3 312#define PRIO_MAX 3
915#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
918#define PRIO_IDLE -3 316#define PRIO_IDLE -3
919#define PRIO_MIN -4 317#define PRIO_MIN -4
920 318
921/* for Coro.pm */ 319/* for Coro.pm */
922static SV *coro_current; 320static SV *coro_current;
923static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
924static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
324static struct coro *coro_first;
325#define coro_nready coroapi.nready
925 326
926static void 327/** lowlevel stuff **********************************************************/
927coro_enq (SV *coro_sv)
928{
929 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
930 coro_nready++;
931}
932 328
933static SV * 329static SV *
934coro_deq (int min_prio) 330coro_get_sv (pTHX_ const char *name, int create)
935{ 331{
936 int prio = PRIO_MAX - PRIO_MIN; 332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_sv (name, create);
335#endif
336 return get_sv (name, create);
337}
937 338
938 min_prio -= PRIO_MIN; 339static AV *
939 if (min_prio < 0) 340coro_get_av (pTHX_ const char *name, int create)
940 min_prio = 0; 341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_av (name, create);
345#endif
346 return get_av (name, create);
347}
941 348
942 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 349static HV *
943 if (AvFILLp (coro_ready [prio]) >= 0) 350coro_get_hv (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
425static AV *
426coro_derive_padlist (pTHX_ CV *cv)
427{
428 AV *padlist = CvPADLIST (cv);
429 AV *newpadlist, *newpad;
430
431 newpadlist = newAV ();
432 AvREAL_off (newpadlist);
433#if PERL_VERSION_ATLEAST (5,10,0)
434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
435#else
436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
437#endif
438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
439 --AvFILLp (padlist);
440
441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
442 av_store (newpadlist, 1, (SV *)newpad);
443
444 return newpadlist;
445}
446
447static void
448free_padlist (pTHX_ AV *padlist)
449{
450 /* may be during global destruction */
451 if (!IN_DESTRUCT)
452 {
453 I32 i = AvFILLp (padlist);
454
455 while (i > 0) /* special-case index 0 */
456 {
457 /* we try to be extra-careful here */
458 AV *av = (AV *)AvARRAY (padlist)[i--];
459 I32 j = AvFILLp (av);
460
461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
465 SvREFCNT_dec (av);
466 }
467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
471 SvREFCNT_dec ((SV*)padlist);
472 }
473}
474
475static int
476coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
477{
478 AV *padlist;
479 AV *av = (AV *)mg->mg_obj;
480
481 /* casting is fun. */
482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
483 free_padlist (aTHX_ padlist);
484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
487 return 0;
488}
489
490static MGVTBL coro_cv_vtbl = {
491 0, 0, 0, 0,
492 coro_cv_free
493};
494
495/* the next two functions merely cache the padlists */
496static void
497get_padlist (pTHX_ CV *cv)
498{
499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
501
502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
504 else
505 {
506#if CORO_PREFER_PERL_FUNCTIONS
507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
509 CV *cp = Perl_cv_clone (aTHX_ cv);
510 CvPADLIST (cv) = CvPADLIST (cp);
511 CvPADLIST (cp) = 0;
512 SvREFCNT_dec (cp);
513#else
514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
515#endif
516 }
517}
518
519static void
520put_padlist (pTHX_ CV *cv)
521{
522 MAGIC *mg = CORO_MAGIC_cv (cv);
523 AV *av;
524
525 if (expect_false (!mg))
526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
527
528 av = (AV *)mg->mg_obj;
529
530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
531 av_extend (av, AvFILLp (av) + 1);
532
533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
534}
535
536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
542load_perl (pTHX_ Coro__State c)
543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
555 #define VAR(name,type) PL_ ## name = slot->name;
556 # include "state.h"
557 #undef VAR
558
559 {
560 dSP;
561
562 CV *cv;
563
564 /* now do the ugly restore mess */
565 while (expect_true (cv = (CV *)POPs))
944 { 566 {
945 coro_nready--; 567 put_padlist (aTHX_ cv); /* mark this padlist as available */
946 return av_shift (coro_ready [prio]); 568 CvDEPTH (cv) = PTR2IV (POPs);
569 CvPADLIST (cv) = (AV *)POPs;
947 } 570 }
948 571
572 PUTBACK;
573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
585}
586
587static void
588save_perl (pTHX_ Coro__State c)
589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
601 {
602 dSP;
603 I32 cxix = cxstack_ix;
604 PERL_CONTEXT *ccstk = cxstack;
605 PERL_SI *top_si = PL_curstackinfo;
606
607 /*
608 * the worst thing you can imagine happens first - we have to save
609 * (and reinitialize) all cv's in the whole callchain :(
610 */
611
612 XPUSHs (Nullsv);
613 /* this loop was inspired by pp_caller */
614 for (;;)
615 {
616 while (expect_true (cxix >= 0))
617 {
618 PERL_CONTEXT *cx = &ccstk[cxix--];
619
620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
621 {
622 CV *cv = cx->blk_sub.cv;
623
624 if (expect_true (CvDEPTH (cv)))
625 {
626 EXTEND (SP, 3);
627 PUSHs ((SV *)CvPADLIST (cv));
628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
629 PUSHs ((SV *)cv);
630
631 CvDEPTH (cv) = 0;
632 get_padlist (aTHX_ cv);
633 }
634 }
635 }
636
637 if (expect_true (top_si->si_type == PERLSI_MAIN))
638 break;
639
640 top_si = top_si->si_prev;
641 ccstk = top_si->si_cxstack;
642 cxix = top_si->si_cxix;
643 }
644
645 PUTBACK;
646 }
647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675}
676
677/*
678 * allocate various perl stacks. This is almost an exact copy
679 * of perl.c:init_stacks, except that it uses less memory
680 * on the (sometimes correct) assumption that coroutines do
681 * not usually need a lot of stackspace.
682 */
683#if CORO_PREFER_PERL_FUNCTIONS
684# define coro_init_stacks(thx) init_stacks ()
685#else
686static void
687coro_init_stacks (pTHX)
688{
689 PL_curstackinfo = new_stackinfo(32, 8);
690 PL_curstackinfo->si_type = PERLSI_MAIN;
691 PL_curstack = PL_curstackinfo->si_stack;
692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
693
694 PL_stack_base = AvARRAY(PL_curstack);
695 PL_stack_sp = PL_stack_base;
696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
697
698 New(50,PL_tmps_stack,32,SV*);
699 PL_tmps_floor = -1;
700 PL_tmps_ix = -1;
701 PL_tmps_max = 32;
702
703 New(54,PL_markstack,16,I32);
704 PL_markstack_ptr = PL_markstack;
705 PL_markstack_max = PL_markstack + 16;
706
707#ifdef SET_MARK_OFFSET
708 SET_MARK_OFFSET;
709#endif
710
711 New(54,PL_scopestack,8,I32);
712 PL_scopestack_ix = 0;
713 PL_scopestack_max = 8;
714
715 New(54,PL_savestack,24,ANY);
716 PL_savestack_ix = 0;
717 PL_savestack_max = 24;
718
719#if !PERL_VERSION_ATLEAST (5,10,0)
720 New(54,PL_retstack,4,OP*);
721 PL_retstack_ix = 0;
722 PL_retstack_max = 4;
723#endif
724}
725#endif
726
727/*
728 * destroy the stacks, the callchain etc...
729 */
730static void
731coro_destruct_stacks (pTHX)
732{
733 while (PL_curstackinfo->si_next)
734 PL_curstackinfo = PL_curstackinfo->si_next;
735
736 while (PL_curstackinfo)
737 {
738 PERL_SI *p = PL_curstackinfo->si_prev;
739
740 if (!IN_DESTRUCT)
741 SvREFCNT_dec (PL_curstackinfo->si_stack);
742
743 Safefree (PL_curstackinfo->si_cxstack);
744 Safefree (PL_curstackinfo);
745 PL_curstackinfo = p;
746 }
747
748 Safefree (PL_tmps_stack);
749 Safefree (PL_markstack);
750 Safefree (PL_scopestack);
751 Safefree (PL_savestack);
752#if !PERL_VERSION_ATLEAST (5,10,0)
753 Safefree (PL_retstack);
754#endif
755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
766static size_t
767coro_rss (pTHX_ struct coro *coro)
768{
769 size_t rss = sizeof (*coro);
770
771 if (coro->mainstack)
772 {
773 if (coro->flags & CF_RUNNING)
774 {
775 #define SYM(sym) PL_ ## sym
776 CORO_RSS;
777 #undef SYM
778 }
779 else
780 {
781 #define SYM(sym) coro->slot->sym
782 CORO_RSS;
783 #undef SYM
784 }
785 }
786
787 return rss;
788}
789
790/** coroutine stack handling ************************************************/
791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
949 return 0; 889 return 0;
950} 890}
951 891
952static int 892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
901coro_setup (pTHX_ struct coro *coro)
902{
903 /*
904 * emulate part of the perl startup here.
905 */
906 coro_init_stacks (aTHX);
907
908 PL_runops = RUNOPS_DEFAULT;
909 PL_curcop = &PL_compiling;
910 PL_in_eval = EVAL_NULL;
911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
915 PL_curpm = 0;
916 PL_curpad = 0;
917 PL_localizing = 0;
918 PL_dirty = 0;
919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
936
937 {
938 dSP;
939 UNOP myop;
940
941 Zero (&myop, 1, UNOP);
942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
944 myop.op_flags = OPf_WANT_VOID;
945
946 PUSHMARK (SP);
947 PUSHs ((SV *)coro->startcv);
948 PUTBACK;
949 PL_op = (OP *)&myop;
950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
951 }
952
953 /* this newly created coroutine might be run on an existing cctx which most
954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
996
997 SvREFCNT_dec (GvSV (PL_defgv));
998 SvREFCNT_dec (GvAV (PL_defgv));
999 SvREFCNT_dec (GvSV (PL_errgv));
1000 SvREFCNT_dec (PL_defoutgv);
1001 SvREFCNT_dec (PL_rs);
1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
1004
1005 SvREFCNT_dec (PL_diehook);
1006 SvREFCNT_dec (PL_warnhook);
1007
1008 SvREFCNT_dec (coro->saved_deffh);
1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
1012
1013 coro_destruct_stacks (aTHX);
1014}
1015
1016INLINE void
1017free_coro_mortal (pTHX)
1018{
1019 if (expect_true (coro_mortal))
1020 {
1021 SvREFCNT_dec (coro_mortal);
1022 coro_mortal = 0;
1023 }
1024}
1025
1026static int
1027runops_trace (pTHX)
1028{
1029 COP *oldcop = 0;
1030 int oldcxix = -2;
1031
1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1033 {
1034 PERL_ASYNC_CHECK ();
1035
1036 if (cctx_current->flags & CC_TRACE_ALL)
1037 {
1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1039 {
1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1041 SV **bot, **top;
1042 AV *av = newAV (); /* return values */
1043 SV **cb;
1044 dSP;
1045
1046 GV *gv = CvGV (cx->blk_sub.cv);
1047 SV *fullname = sv_2mortal (newSV (0));
1048 if (isGV (gv))
1049 gv_efullname3 (fullname, gv, 0);
1050
1051 bot = PL_stack_base + cx->blk_oldsp + 1;
1052 top = cx->blk_gimme == G_ARRAY ? SP + 1
1053 : cx->blk_gimme == G_SCALAR ? bot + 1
1054 : bot;
1055
1056 av_extend (av, top - bot);
1057 while (bot < top)
1058 av_push (av, SvREFCNT_inc_NN (*bot++));
1059
1060 PL_runops = RUNOPS_DEFAULT;
1061 ENTER;
1062 SAVETMPS;
1063 EXTEND (SP, 3);
1064 PUSHMARK (SP);
1065 PUSHs (&PL_sv_no);
1066 PUSHs (fullname);
1067 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1068 PUTBACK;
1069 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1070 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1071 SPAGAIN;
1072 FREETMPS;
1073 LEAVE;
1074 PL_runops = runops_trace;
1075 }
1076
1077 if (oldcop != PL_curcop)
1078 {
1079 oldcop = PL_curcop;
1080
1081 if (PL_curcop != &PL_compiling)
1082 {
1083 SV **cb;
1084
1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1086 {
1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1088
1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1090 {
1091 dSP;
1092 GV *gv = CvGV (cx->blk_sub.cv);
1093 SV *fullname = sv_2mortal (newSV (0));
1094
1095 if (isGV (gv))
1096 gv_efullname3 (fullname, gv, 0);
1097
1098 PL_runops = RUNOPS_DEFAULT;
1099 ENTER;
1100 SAVETMPS;
1101 EXTEND (SP, 3);
1102 PUSHMARK (SP);
1103 PUSHs (&PL_sv_yes);
1104 PUSHs (fullname);
1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1106 PUTBACK;
1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1109 SPAGAIN;
1110 FREETMPS;
1111 LEAVE;
1112 PL_runops = runops_trace;
1113 }
1114
1115 oldcxix = cxstack_ix;
1116 }
1117
1118 if (cctx_current->flags & CC_TRACE_LINE)
1119 {
1120 dSP;
1121
1122 PL_runops = RUNOPS_DEFAULT;
1123 ENTER;
1124 SAVETMPS;
1125 EXTEND (SP, 3);
1126 PL_runops = RUNOPS_DEFAULT;
1127 PUSHMARK (SP);
1128 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1129 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1130 PUTBACK;
1131 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1132 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1133 SPAGAIN;
1134 FREETMPS;
1135 LEAVE;
1136 PL_runops = runops_trace;
1137 }
1138 }
1139 }
1140 }
1141 }
1142
1143 TAINT_NOT;
1144 return 0;
1145}
1146
1147static struct CoroSLF cctx_ssl_frame;
1148
1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1164static void NOINLINE
1165cctx_prepare (pTHX)
1166{
1167 PL_top_env = &PL_start_env;
1168
1169 if (cctx_current->flags & CC_TRACE)
1170 PL_runops = runops_trace;
1171
1172 /* we already must be executing an SLF op, there is no other valid way
1173 * that can lead to creation of a new cctx */
1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1176
1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1178 cctx_ssl_frame = slf_frame;
1179
1180 slf_frame.prepare = slf_prepare_set_stacklevel;
1181 slf_frame.check = slf_check_set_stacklevel;
1182}
1183
1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
1189}
1190
1191/*
1192 * this is a _very_ stripped down perl interpreter ;)
1193 */
1194static void
1195cctx_run (void *arg)
1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
1203 dTHX;
1204
1205 /* normally we would need to skip the entersub here */
1206 /* not doing so will re-execute it, which is exactly what we want */
1207 /* PL_nop = PL_nop->op_next */
1208
1209 /* inject a fake subroutine call to cctx_init */
1210 cctx_prepare (aTHX);
1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
1215 /* somebody or something will hit me for both perl_run and PL_restartop */
1216 PL_restartop = PL_op;
1217 perl_run (PL_curinterp);
1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
1224 * If perl-run returns we assume exit() was being called or the coro
1225 * fell off the end, which seems to be the only valid (non-bug)
1226 * reason for perl_run to return. We try to exit by jumping to the
1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
1231 */
1232 PL_top_env = main_top_env;
1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
1235}
1236
1237static coro_cctx *
1238cctx_new ()
1239{
1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
1269 void *stack_start;
1270 size_t stack_size;
1271
1272#if HAVE_MMAP
1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1274 /* mmap supposedly does allocate-on-write for us */
1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1276
1277 if (cctx->sptr != (void *)-1)
1278 {
1279 #if CORO_STACKGUARD
1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1281 #endif
1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1284 cctx->flags |= CC_MAPPED;
1285 }
1286 else
1287#endif
1288 {
1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1290 New (0, cctx->sptr, cctx_stacksize, long);
1291
1292 if (!cctx->sptr)
1293 {
1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1295 _exit (EXIT_FAILURE);
1296 }
1297
1298 stack_start = cctx->sptr;
1299 stack_size = cctx->ssize;
1300 }
1301
1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1307
1308 return cctx;
1309}
1310
1311static void
1312cctx_destroy (coro_cctx *cctx)
1313{
1314 if (!cctx)
1315 return;
1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1325 #if CORO_USE_VALGRIND
1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1327 #endif
1328
1329#if HAVE_MMAP
1330 if (cctx->flags & CC_MAPPED)
1331 munmap (cctx->sptr, cctx->ssize);
1332 else
1333#endif
1334 Safefree (cctx->sptr);
1335 }
1336
1337 Safefree (cctx);
1338}
1339
1340/* wether this cctx should be destructed */
1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1342
1343static coro_cctx *
1344cctx_get (pTHX)
1345{
1346 while (expect_true (cctx_first))
1347 {
1348 coro_cctx *cctx = cctx_first;
1349 cctx_first = cctx->next;
1350 --cctx_idle;
1351
1352 if (expect_true (!CCTX_EXPIRED (cctx)))
1353 return cctx;
1354
1355 cctx_destroy (cctx);
1356 }
1357
1358 return cctx_new_run ();
1359}
1360
1361static void
1362cctx_put (coro_cctx *cctx)
1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1366 /* free another cctx if overlimit */
1367 if (expect_false (cctx_idle >= cctx_max_idle))
1368 {
1369 coro_cctx *first = cctx_first;
1370 cctx_first = first->next;
1371 --cctx_idle;
1372
1373 cctx_destroy (first);
1374 }
1375
1376 ++cctx_idle;
1377 cctx->next = cctx_first;
1378 cctx_first = cctx;
1379}
1380
1381/** coroutine switching *****************************************************/
1382
1383static void
1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1388 if (expect_true (prev != next))
1389 {
1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1392
1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1395
1396#if !PERL_VERSION_ATLEAST (5,10,0)
1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1399#endif
1400 }
1401}
1402
1403/* always use the TRANSFER macro */
1404static void NOINLINE /* noinline so we have a fixed stackframe */
1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1406{
1407 dSTACKLEVEL;
1408
1409 /* sometimes transfer is only called to set idle_sp */
1410 if (expect_false (!prev))
1411 {
1412 cctx_current->idle_sp = STACKLEVEL;
1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1414 }
1415 else if (expect_true (prev != next))
1416 {
1417 coro_cctx *cctx_prev;
1418
1419 if (expect_false (prev->flags & CF_NEW))
1420 {
1421 /* create a new empty/source context */
1422 prev->flags &= ~CF_NEW;
1423 prev->flags |= CF_RUNNING;
1424 }
1425
1426 prev->flags &= ~CF_RUNNING;
1427 next->flags |= CF_RUNNING;
1428
1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
1431
1432 if (expect_false (next->flags & CF_NEW))
1433 {
1434 /* need to start coroutine */
1435 next->flags &= ~CF_NEW;
1436 /* setup coroutine call */
1437 coro_setup (aTHX_ next);
1438 }
1439 else
1440 load_perl (aTHX_ next);
1441
1442 /* possibly untie and reuse the cctx */
1443 if (expect_true (
1444 cctx_current->idle_sp == STACKLEVEL
1445 && !(cctx_current->flags & CC_TRACE)
1446 && !force_cctx
1447 ))
1448 {
1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1451
1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1455 if (expect_true (!next->cctx))
1456 next->cctx = cctx_get (aTHX);
1457
1458 cctx_put (cctx_current);
1459 }
1460 else
1461 prev->cctx = cctx_current;
1462
1463 ++next->usecount;
1464
1465 cctx_prev = cctx_current;
1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1467
1468 next->cctx = 0;
1469
1470 if (expect_false (cctx_prev != cctx_current))
1471 {
1472 cctx_prev->top_env = PL_top_env;
1473 PL_top_env = cctx_current->top_env;
1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1475 }
1476
1477 transfer_tail (aTHX);
1478 }
1479}
1480
1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1483
1484/** high level stuff ********************************************************/
1485
1486static int
1487coro_state_destroy (pTHX_ struct coro *coro)
1488{
1489 if (coro->flags & CF_DESTROYED)
1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1494
1495 coro->flags |= CF_DESTROYED;
1496
1497 if (coro->flags & CF_READY)
1498 {
1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1500 /* alternative: look through all ready queues and remove the coro */
1501 --coro_nready;
1502 }
1503 else
1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1505
1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1510 {
1511 struct coro *current = SvSTATE_current;
1512
1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1514
1515 save_perl (aTHX_ current);
1516 load_perl (aTHX_ coro);
1517
1518 coro_destruct_perl (aTHX_ coro);
1519
1520 load_perl (aTHX_ current);
1521
1522 coro->slot = 0;
1523 }
1524
1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1529
1530 if (coro->next) coro->next->prev = coro->prev;
1531 if (coro->prev) coro->prev->next = coro->next;
1532 if (coro == coro_first) coro_first = coro->next;
1533
1534 return 1;
1535}
1536
1537static int
1538coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1539{
1540 struct coro *coro = (struct coro *)mg->mg_ptr;
1541 mg->mg_ptr = 0;
1542
1543 coro->hv = 0;
1544
1545 if (--coro->refcnt < 0)
1546 {
1547 coro_state_destroy (aTHX_ coro);
1548 Safefree (coro);
1549 }
1550
1551 return 0;
1552}
1553
1554static int
1555coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1556{
1557 struct coro *coro = (struct coro *)mg->mg_ptr;
1558
1559 ++coro->refcnt;
1560
1561 return 0;
1562}
1563
1564static MGVTBL coro_state_vtbl = {
1565 0, 0, 0, 0,
1566 coro_state_free,
1567 0,
1568#ifdef MGf_DUP
1569 coro_state_dup,
1570#else
1571# define MGf_DUP 0
1572#endif
1573};
1574
1575static void
1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1577{
1578 ta->prev = SvSTATE (prev_sv);
1579 ta->next = SvSTATE (next_sv);
1580 TRANSFER_CHECK (*ta);
1581}
1582
1583static void
1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1585{
1586 struct coro_transfer_args ta;
1587
1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1589 TRANSFER (ta, 1);
1590}
1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1615/** Coro ********************************************************************/
1616
1617INLINE void
1618coro_enq (pTHX_ struct coro *coro)
1619{
1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1621
1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1630coro_deq (pTHX)
1631{
1632 int prio;
1633
1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1635 {
1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1645
1646 return 0;
1647}
1648
1649static int
953api_ready (SV *coro_sv) 1650api_ready (pTHX_ SV *coro_sv)
954{ 1651{
955 struct coro *coro; 1652 struct coro *coro;
956 1653 SV *sv_hook;
957 if (SvROK (coro_sv)) 1654 void (*xs_hook)(void);
958 coro_sv = SvRV (coro_sv);
959 1655
960 coro = SvSTATE (coro_sv); 1656 coro = SvSTATE (coro_sv);
961 1657
962 if (coro->flags & CF_READY) 1658 if (coro->flags & CF_READY)
963 return 0; 1659 return 0;
964 1660
965 coro->flags |= CF_READY; 1661 coro->flags |= CF_READY;
966 1662
967 LOCK; 1663 sv_hook = coro_nready ? 0 : coro_readyhook;
968 coro_enq (SvREFCNT_inc (coro_sv)); 1664 xs_hook = coro_nready ? 0 : coroapi.readyhook;
969 UNLOCK; 1665
1666 coro_enq (aTHX_ coro);
1667 ++coro_nready;
1668
1669 if (sv_hook)
1670 {
1671 dSP;
1672
1673 ENTER;
1674 SAVETMPS;
1675
1676 PUSHMARK (SP);
1677 PUTBACK;
1678 call_sv (sv_hook, G_VOID | G_DISCARD);
1679
1680 FREETMPS;
1681 LEAVE;
1682 }
1683
1684 if (xs_hook)
1685 xs_hook ();
970 1686
971 return 1; 1687 return 1;
972} 1688}
973 1689
974static int 1690static int
975api_is_ready (SV *coro_sv) 1691api_is_ready (pTHX_ SV *coro_sv)
976{ 1692{
977 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1693 return !!(SvSTATE (coro_sv)->flags & CF_READY);
978} 1694}
979 1695
1696/* expects to own a reference to next->hv */
1697INLINE void
1698prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1699{
1700 SV *prev_sv = SvRV (coro_current);
1701
1702 ta->prev = SvSTATE_hv (prev_sv);
1703 ta->next = next;
1704
1705 TRANSFER_CHECK (*ta);
1706
1707 SvRV_set (coro_current, (SV *)next->hv);
1708
1709 free_coro_mortal (aTHX);
1710 coro_mortal = prev_sv;
1711}
1712
980static void 1713static void
981prepare_schedule (struct transfer_args *ta) 1714prepare_schedule (pTHX_ struct coro_transfer_args *ta)
982{ 1715{
983 SV *prev, *next;
984
985 for (;;) 1716 for (;;)
986 { 1717 {
987 LOCK; 1718 struct coro *next = coro_deq (aTHX);
988 next = coro_deq (PRIO_MIN);
989 UNLOCK;
990 1719
991 if (next) 1720 if (expect_true (next))
1721 {
1722 /* cannot transfer to destroyed coros, skip and look for next */
1723 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1724 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1725 else
1726 {
1727 next->flags &= ~CF_READY;
1728 --coro_nready;
1729
1730 prepare_schedule_to (aTHX_ ta, next);
992 break; 1731 break;
1732 }
1733 }
1734 else
1735 {
1736 /* nothing to schedule: call the idle handler */
1737 if (SvROK (sv_idle)
1738 && SvOBJECT (SvRV (sv_idle)))
1739 {
1740 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1741 api_ready (aTHX_ SvRV (sv_idle));
1742 --coro_nready;
1743 }
1744 else
1745 {
1746 dSP;
1747
1748 ENTER;
1749 SAVETMPS;
1750
1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (sv_idle, G_VOID | G_DISCARD);
1754
1755 FREETMPS;
1756 LEAVE;
1757 }
1758 }
1759 }
1760}
1761
1762INLINE void
1763prepare_cede (pTHX_ struct coro_transfer_args *ta)
1764{
1765 api_ready (aTHX_ coro_current);
1766 prepare_schedule (aTHX_ ta);
1767}
1768
1769INLINE void
1770prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1771{
1772 SV *prev = SvRV (coro_current);
1773
1774 if (coro_nready)
1775 {
1776 prepare_schedule (aTHX_ ta);
1777 api_ready (aTHX_ prev);
1778 }
1779 else
1780 prepare_nop (aTHX_ ta);
1781}
1782
1783static void
1784api_schedule (pTHX)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_schedule (aTHX_ &ta);
1789 TRANSFER (ta, 1);
1790}
1791
1792static void
1793api_schedule_to (pTHX_ SV *coro_sv)
1794{
1795 struct coro_transfer_args ta;
1796 struct coro *next = SvSTATE (coro_sv);
1797
1798 SvREFCNT_inc_NN (coro_sv);
1799 prepare_schedule_to (aTHX_ &ta, next);
1800}
1801
1802static int
1803api_cede (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_cede (aTHX_ &ta);
1808
1809 if (expect_true (ta.prev != ta.next))
1810 {
1811 TRANSFER (ta, 1);
1812 return 1;
1813 }
1814 else
1815 return 0;
1816}
1817
1818static int
1819api_cede_notself (pTHX)
1820{
1821 if (coro_nready)
1822 {
1823 struct coro_transfer_args ta;
1824
1825 prepare_cede_notself (aTHX_ &ta);
1826 TRANSFER (ta, 1);
1827 return 1;
1828 }
1829 else
1830 return 0;
1831}
1832
1833static void
1834api_trace (pTHX_ SV *coro_sv, int flags)
1835{
1836 struct coro *coro = SvSTATE (coro_sv);
1837
1838 if (coro->flags & CF_RUNNING)
1839 croak ("cannot enable tracing on a running coroutine, caught");
1840
1841 if (flags & CC_TRACE)
1842 {
1843 if (!coro->cctx)
1844 coro->cctx = cctx_new_run ();
1845 else if (!(coro->cctx->flags & CC_TRACE))
1846 croak ("cannot enable tracing on coroutine with custom stack, caught");
1847
1848 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1849 }
1850 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1851 {
1852 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1853
1854 if (coro->flags & CF_RUNNING)
1855 PL_runops = RUNOPS_DEFAULT;
1856 else
1857 coro->slot->runops = RUNOPS_DEFAULT;
1858 }
1859}
1860
1861static void
1862coro_call_on_destroy (pTHX_ struct coro *coro)
1863{
1864 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1865 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1866
1867 if (on_destroyp)
1868 {
1869 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1870
1871 while (AvFILLp (on_destroy) >= 0)
1872 {
1873 dSP; /* don't disturb outer sp */
1874 SV *cb = av_pop (on_destroy);
1875
1876 PUSHMARK (SP);
1877
1878 if (statusp)
1879 {
1880 int i;
1881 AV *status = (AV *)SvRV (*statusp);
1882 EXTEND (SP, AvFILLp (status) + 1);
1883
1884 for (i = 0; i <= AvFILLp (status); ++i)
1885 PUSHs (AvARRAY (status)[i]);
1886 }
1887
1888 PUTBACK;
1889 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1890 }
1891 }
1892}
1893
1894static void
1895slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 int i;
1898 HV *hv = (HV *)SvRV (coro_current);
1899 AV *av = newAV ();
1900
1901 av_extend (av, items - 1);
1902 for (i = 0; i < items; ++i)
1903 av_push (av, SvREFCNT_inc_NN (arg [i]));
1904
1905 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1906
1907 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1908 api_ready (aTHX_ sv_manager);
1909
1910 frame->prepare = prepare_schedule;
1911 frame->check = slf_check_repeat;
1912
1913 /* as a minor optimisation, we could unwind all stacks here */
1914 /* but that puts extra pressure on pp_slf, and is not worth much */
1915 /*coro_unwind_stacks (aTHX);*/
1916}
1917
1918/*****************************************************************************/
1919/* async pool handler */
1920
1921static int
1922slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = (struct coro *)frame->data;
1926
1927 if (!coro->invoke_cb)
1928 return 1; /* loop till we have invoke */
1929 else
1930 {
1931 hv_store (hv, "desc", sizeof ("desc") - 1,
1932 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1933
1934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
993 1935
994 { 1936 {
995 dSP; 1937 dSP;
996 1938 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
997 ENTER;
998 SAVETMPS;
999
1000 PUSHMARK (SP);
1001 PUTBACK; 1939 PUTBACK;
1002 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1003
1004 FREETMPS;
1005 LEAVE;
1006 } 1940 }
1941
1942 SvREFCNT_dec (GvAV (PL_defgv));
1943 GvAV (PL_defgv) = coro->invoke_av;
1944 coro->invoke_av = 0;
1945
1946 return 0;
1947 }
1948}
1949
1950static void
1951slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1952{
1953 HV *hv = (HV *)SvRV (coro_current);
1954 struct coro *coro = SvSTATE_hv ((SV *)hv);
1955
1956 if (expect_true (coro->saved_deffh))
1007 } 1957 {
1958 /* subsequent iteration */
1959 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1960 coro->saved_deffh = 0;
1008 1961
1009 prev = SvRV (coro_current); 1962 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1010 SvRV_set (coro_current, next); 1963 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1964 {
1965 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1966 coro->invoke_av = newAV ();
1011 1967
1012 /* free this only after the transfer */ 1968 frame->prepare = prepare_nop;
1013 LOCK; 1969 }
1014 free_coro_mortal (); 1970 else
1015 UNLOCK; 1971 {
1016 coro_mortal = prev; 1972 av_clear (GvAV (PL_defgv));
1973 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1017 1974
1018 assert (!SvROK(prev));//D 1975 coro->prio = 0;
1019 assert (!SvROK(next));//D
1020 1976
1021 ta->prev = SvSTATE (prev); 1977 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1022 ta->next = SvSTATE (next); 1978 api_trace (aTHX_ coro_current, 0);
1023 1979
1024 assert (ta->next->flags & CF_READY); 1980 frame->prepare = prepare_schedule;
1025 ta->next->flags &= ~CF_READY; 1981 av_push (av_async_pool, SvREFCNT_inc (hv));
1026} 1982 }
1983 }
1984 else
1985 {
1986 /* first iteration, simply fall through */
1987 frame->prepare = prepare_nop;
1988 }
1027 1989
1990 frame->check = slf_check_pool_handler;
1991 frame->data = (void *)coro;
1992}
1993
1994/*****************************************************************************/
1995/* rouse callback */
1996
1997#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1998
1028static void 1999static void
1029prepare_cede (struct transfer_args *ta) 2000coro_rouse_callback (pTHX_ CV *cv)
1030{ 2001{
1031 api_ready (coro_current); 2002 dXSARGS;
1032 prepare_schedule (ta); 2003 SV *data = (SV *)GENSUB_ARG;
2004
2005 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2006 {
2007 /* first call, set args */
2008 SV *coro = SvRV (data);
2009 AV *av = newAV ();
2010
2011 SvRV_set (data, (SV *)av);
2012
2013 /* better take a full copy of the arguments */
2014 while (items--)
2015 av_store (av, items, newSVsv (ST (items)));
2016
2017 api_ready (aTHX_ coro);
2018 SvREFCNT_dec (coro);
2019 }
2020
2021 XSRETURN_EMPTY;
1033} 2022}
1034 2023
1035static int 2024static int
1036prepare_cede_notself (struct transfer_args *ta) 2025slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1037{ 2026{
1038 if (coro_nready) 2027 SV *data = (SV *)frame->data;
2028
2029 if (CORO_THROW)
2030 return 0;
2031
2032 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2033 return 1;
2034
2035 /* now push all results on the stack */
2036 {
2037 dSP;
2038 AV *av = (AV *)SvRV (data);
2039 int i;
2040
2041 EXTEND (SP, AvFILLp (av) + 1);
2042 for (i = 0; i <= AvFILLp (av); ++i)
2043 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2044
2045 /* we have stolen the elements, so set length to zero and free */
2046 AvFILLp (av) = -1;
2047 av_undef (av);
2048
2049 PUTBACK;
2050 }
2051
2052 return 0;
2053}
2054
2055static void
2056slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2057{
2058 SV *cb;
2059
2060 if (items)
2061 cb = arg [0];
2062 else
2063 {
2064 struct coro *coro = SvSTATE_current;
2065
2066 if (!coro->rouse_cb)
2067 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2068
2069 cb = sv_2mortal (coro->rouse_cb);
2070 coro->rouse_cb = 0;
1039 { 2071 }
2072
2073 if (!SvROK (cb)
2074 || SvTYPE (SvRV (cb)) != SVt_PVCV
2075 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2076 croak ("Coro::rouse_wait called with illegal callback argument,");
2077
2078 {
2079 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2080 SV *data = (SV *)GENSUB_ARG;
2081
2082 frame->data = (void *)data;
2083 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2084 frame->check = slf_check_rouse_wait;
2085 }
2086}
2087
2088static SV *
2089coro_new_rouse_cb (pTHX)
2090{
1040 SV *prev = SvRV (coro_current); 2091 HV *hv = (HV *)SvRV (coro_current);
1041 prepare_schedule (ta); 2092 struct coro *coro = SvSTATE_hv (hv);
1042 api_ready (prev); 2093 SV *data = newRV_inc ((SV *)hv);
2094 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2095
2096 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2097 SvREFCNT_dec (data); /* magicext increases the refcount */
2098
2099 SvREFCNT_dec (coro->rouse_cb);
2100 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2101
2102 return cb;
2103}
2104
2105/*****************************************************************************/
2106/* schedule-like-function opcode (SLF) */
2107
2108static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2109static const CV *slf_cv;
2110static SV **slf_argv;
2111static int slf_argc, slf_arga; /* count, allocated */
2112static I32 slf_ax; /* top of stack, for restore */
2113
2114/* this restores the stack in the case we patched the entersub, to */
2115/* recreate the stack frame as perl will on following calls */
2116/* since entersub cleared the stack */
2117static OP *
2118pp_restore (pTHX)
2119{
2120 int i;
2121 SV **SP = PL_stack_base + slf_ax;
2122
2123 PUSHMARK (SP);
2124
2125 EXTEND (SP, slf_argc + 1);
2126
2127 for (i = 0; i < slf_argc; ++i)
2128 PUSHs (sv_2mortal (slf_argv [i]));
2129
2130 PUSHs ((SV *)CvGV (slf_cv));
2131
2132 RETURNOP (slf_restore.op_first);
2133}
2134
2135static void
2136slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2137{
2138 SV **arg = (SV **)slf_frame.data;
2139
2140 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2141}
2142
2143static void
2144slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2145{
2146 if (items != 2)
2147 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2148
2149 frame->prepare = slf_prepare_transfer;
2150 frame->check = slf_check_nop;
2151 frame->data = (void *)arg; /* let's hope it will stay valid */
2152}
2153
2154static void
2155slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_nop;
2159}
2160
2161static void
2162slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2163{
2164 struct coro *next = (struct coro *)slf_frame.data;
2165
2166 SvREFCNT_inc_NN (next->hv);
2167 prepare_schedule_to (aTHX_ ta, next);
2168}
2169
2170static void
2171slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2172{
2173 if (!items)
2174 croak ("Coro::schedule_to expects a coroutine argument, caught");
2175
2176 frame->data = (void *)SvSTATE (arg [0]);
2177 frame->prepare = slf_prepare_schedule_to;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2183{
2184 api_ready (aTHX_ SvRV (coro_current));
2185
2186 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2187}
2188
2189static void
2190slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 frame->prepare = prepare_cede;
2193 frame->check = slf_check_nop;
2194}
2195
2196static void
2197slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede_notself;
2200 frame->check = slf_check_nop;
2201}
2202
2203/*
2204 * these not obviously related functions are all rolled into one
2205 * function to increase chances that they all will call transfer with the same
2206 * stack offset
2207 * SLF stands for "schedule-like-function".
2208 */
2209static OP *
2210pp_slf (pTHX)
2211{
2212 I32 checkmark; /* mark SP to see how many elements check has pushed */
2213
2214 /* set up the slf frame, unless it has already been set-up */
2215 /* the latter happens when a new coro has been started */
2216 /* or when a new cctx was attached to an existing coroutine */
2217 if (expect_true (!slf_frame.prepare))
2218 {
2219 /* first iteration */
2220 dSP;
2221 SV **arg = PL_stack_base + TOPMARK + 1;
2222 int items = SP - arg; /* args without function object */
2223 SV *gv = *sp;
2224
2225 /* do a quick consistency check on the "function" object, and if it isn't */
2226 /* for us, divert to the real entersub */
2227 if (SvTYPE (gv) != SVt_PVGV
2228 || !GvCV (gv)
2229 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2230 return PL_ppaddr[OP_ENTERSUB](aTHX);
2231
2232 if (!(PL_op->op_flags & OPf_STACKED))
2233 {
2234 /* ampersand-form of call, use @_ instead of stack */
2235 AV *av = GvAV (PL_defgv);
2236 arg = AvARRAY (av);
2237 items = AvFILLp (av) + 1;
2238 }
2239
2240 /* now call the init function, which needs to set up slf_frame */
2241 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2242 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2243
2244 /* pop args */
2245 SP = PL_stack_base + POPMARK;
2246
2247 PUTBACK;
2248 }
2249
2250 /* now that we have a slf_frame, interpret it! */
2251 /* we use a callback system not to make the code needlessly */
2252 /* complicated, but so we can run multiple perl coros from one cctx */
2253
2254 do
2255 {
2256 struct coro_transfer_args ta;
2257
2258 slf_frame.prepare (aTHX_ &ta);
2259 TRANSFER (ta, 0);
2260
2261 checkmark = PL_stack_sp - PL_stack_base;
2262 }
2263 while (slf_frame.check (aTHX_ &slf_frame));
2264
2265 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2266
2267 /* exception handling */
2268 if (expect_false (CORO_THROW))
2269 {
2270 SV *exception = sv_2mortal (CORO_THROW);
2271
2272 CORO_THROW = 0;
2273 sv_setsv (ERRSV, exception);
2274 croak (0);
2275 }
2276
2277 /* return value handling - mostly like entersub */
2278 /* make sure we put something on the stack in scalar context */
2279 if (GIMME_V == G_SCALAR)
2280 {
2281 dSP;
2282 SV **bot = PL_stack_base + checkmark;
2283
2284 if (sp == bot) /* too few, push undef */
2285 bot [1] = &PL_sv_undef;
2286 else if (sp != bot + 1) /* too many, take last one */
2287 bot [1] = *sp;
2288
2289 SP = bot + 1;
2290
2291 PUTBACK;
2292 }
2293
2294 return NORMAL;
2295}
2296
2297static void
2298api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2299{
2300 int i;
2301 SV **arg = PL_stack_base + ax;
2302 int items = PL_stack_sp - arg + 1;
2303
2304 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2305
2306 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2307 && PL_op->op_ppaddr != pp_slf)
2308 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2309
2310 CvFLAGS (cv) |= CVf_SLF;
2311 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2312 slf_cv = cv;
2313
2314 /* we patch the op, and then re-run the whole call */
2315 /* we have to put the same argument on the stack for this to work */
2316 /* and this will be done by pp_restore */
2317 slf_restore.op_next = (OP *)&slf_restore;
2318 slf_restore.op_type = OP_CUSTOM;
2319 slf_restore.op_ppaddr = pp_restore;
2320 slf_restore.op_first = PL_op;
2321
2322 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2323
2324 if (PL_op->op_flags & OPf_STACKED)
2325 {
2326 if (items > slf_arga)
2327 {
2328 slf_arga = items;
2329 free (slf_argv);
2330 slf_argv = malloc (slf_arga * sizeof (SV *));
2331 }
2332
2333 slf_argc = items;
2334
2335 for (i = 0; i < items; ++i)
2336 slf_argv [i] = SvREFCNT_inc (arg [i]);
2337 }
2338 else
2339 slf_argc = 0;
2340
2341 PL_op->op_ppaddr = pp_slf;
2342 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2343
2344 PL_op = (OP *)&slf_restore;
2345}
2346
2347/*****************************************************************************/
2348/* dynamic wind */
2349
2350static void
2351on_enterleave_call (pTHX_ SV *cb)
2352{
2353 dSP;
2354
2355 PUSHSTACK;
2356
2357 PUSHMARK (SP);
2358 PUTBACK;
2359 call_sv (cb, G_VOID | G_DISCARD);
2360 SPAGAIN;
2361
2362 POPSTACK;
2363}
2364
2365static SV *
2366coro_avp_pop_and_free (pTHX_ AV **avp)
2367{
2368 AV *av = *avp;
2369 SV *res = av_pop (av);
2370
2371 if (AvFILLp (av) < 0)
2372 {
2373 *avp = 0;
2374 SvREFCNT_dec (av);
2375 }
2376
2377 return res;
2378}
2379
2380static void
2381coro_pop_on_enter (pTHX_ void *coro)
2382{
2383 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2384 SvREFCNT_dec (cb);
2385}
2386
2387static void
2388coro_pop_on_leave (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2391 on_enterleave_call (aTHX_ sv_2mortal (cb));
2392}
2393
2394/*****************************************************************************/
2395/* PerlIO::cede */
2396
2397typedef struct
2398{
2399 PerlIOBuf base;
2400 NV next, every;
2401} PerlIOCede;
2402
2403static IV
2404PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2405{
2406 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2407
2408 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2409 self->next = nvtime () + self->every;
2410
2411 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2412}
2413
2414static SV *
2415PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2416{
2417 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2418
2419 return newSVnv (self->every);
2420}
2421
2422static IV
2423PerlIOCede_flush (pTHX_ PerlIO *f)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426 double now = nvtime ();
2427
2428 if (now >= self->next)
2429 {
2430 api_cede (aTHX);
2431 self->next = now + self->every;
2432 }
2433
2434 return PerlIOBuf_flush (aTHX_ f);
2435}
2436
2437static PerlIO_funcs PerlIO_cede =
2438{
2439 sizeof(PerlIO_funcs),
2440 "cede",
2441 sizeof(PerlIOCede),
2442 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2443 PerlIOCede_pushed,
2444 PerlIOBuf_popped,
2445 PerlIOBuf_open,
2446 PerlIOBase_binmode,
2447 PerlIOCede_getarg,
2448 PerlIOBase_fileno,
2449 PerlIOBuf_dup,
2450 PerlIOBuf_read,
2451 PerlIOBuf_unread,
2452 PerlIOBuf_write,
2453 PerlIOBuf_seek,
2454 PerlIOBuf_tell,
2455 PerlIOBuf_close,
2456 PerlIOCede_flush,
2457 PerlIOBuf_fill,
2458 PerlIOBase_eof,
2459 PerlIOBase_error,
2460 PerlIOBase_clearerr,
2461 PerlIOBase_setlinebuf,
2462 PerlIOBuf_get_base,
2463 PerlIOBuf_bufsiz,
2464 PerlIOBuf_get_ptr,
2465 PerlIOBuf_get_cnt,
2466 PerlIOBuf_set_ptrcnt,
2467};
2468
2469/*****************************************************************************/
2470/* Coro::Semaphore & Coro::Signal */
2471
2472static SV *
2473coro_waitarray_new (pTHX_ int count)
2474{
2475 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2476 AV *av = newAV ();
2477 SV **ary;
2478
2479 /* unfortunately, building manually saves memory */
2480 Newx (ary, 2, SV *);
2481 AvALLOC (av) = ary;
2482#if PERL_VERSION_ATLEAST (5,10,0)
2483 AvARRAY (av) = ary;
2484#else
2485 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2486 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2487 SvPVX ((SV *)av) = (char *)ary;
2488#endif
2489 AvMAX (av) = 1;
2490 AvFILLp (av) = 0;
2491 ary [0] = newSViv (count);
2492
2493 return newRV_noinc ((SV *)av);
2494}
2495
2496/* semaphore */
2497
2498static void
2499coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2500{
2501 SV *count_sv = AvARRAY (av)[0];
2502 IV count = SvIVX (count_sv);
2503
2504 count += adjust;
2505 SvIVX (count_sv) = count;
2506
2507 /* now wake up as many waiters as are expected to lock */
2508 while (count > 0 && AvFILLp (av) > 0)
2509 {
2510 SV *cb;
2511
2512 /* swap first two elements so we can shift a waiter */
2513 AvARRAY (av)[0] = AvARRAY (av)[1];
2514 AvARRAY (av)[1] = count_sv;
2515 cb = av_shift (av);
2516
2517 if (SvOBJECT (cb))
2518 {
2519 api_ready (aTHX_ cb);
2520 --count;
2521 }
2522 else if (SvTYPE (cb) == SVt_PVCV)
2523 {
2524 dSP;
2525 PUSHMARK (SP);
2526 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2527 PUTBACK;
2528 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2529 }
2530
2531 SvREFCNT_dec (cb);
2532 }
2533}
2534
2535static void
2536coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2537{
2538 /* call $sem->adjust (0) to possibly wake up some other waiters */
2539 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2540}
2541
2542static int
2543slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2544{
2545 AV *av = (AV *)frame->data;
2546 SV *count_sv = AvARRAY (av)[0];
2547
2548 /* if we are about to throw, don't actually acquire the lock, just throw */
2549 if (CORO_THROW)
2550 return 0;
2551 else if (SvIVX (count_sv) > 0)
2552 {
2553 SvSTATE_current->on_destroy = 0;
2554
2555 if (acquire)
2556 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2557 else
2558 coro_semaphore_adjust (aTHX_ av, 0);
2559
2560 return 0;
2561 }
2562 else
2563 {
2564 int i;
2565 /* if we were woken up but can't down, we look through the whole */
2566 /* waiters list and only add us if we aren't in there already */
2567 /* this avoids some degenerate memory usage cases */
2568
2569 for (i = 1; i <= AvFILLp (av); ++i)
2570 if (AvARRAY (av)[i] == SvRV (coro_current))
2571 return 1;
2572
2573 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1043 return 1; 2574 return 1;
1044 } 2575 }
2576}
2577
2578static int
2579slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2580{
2581 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2582}
2583
2584static int
2585slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2588}
2589
2590static void
2591slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 AV *av = (AV *)SvRV (arg [0]);
2594
2595 if (SvIVX (AvARRAY (av)[0]) > 0)
2596 {
2597 frame->data = (void *)av;
2598 frame->prepare = prepare_nop;
2599 }
1045 else 2600 else
2601 {
2602 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2603
2604 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2605 frame->prepare = prepare_schedule;
2606
2607 /* to avoid race conditions when a woken-up coro gets terminated */
2608 /* we arrange for a temporary on_destroy that calls adjust (0) */
2609 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2610 }
2611}
2612
2613static void
2614slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2617 frame->check = slf_check_semaphore_down;
2618}
2619
2620static void
2621slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 if (items >= 2)
2624 {
2625 /* callback form */
2626 AV *av = (AV *)SvRV (arg [0]);
2627 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2628
2629 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2630
2631 if (SvIVX (AvARRAY (av)[0]) > 0)
2632 coro_semaphore_adjust (aTHX_ av, 0);
2633
2634 frame->prepare = prepare_nop;
2635 frame->check = slf_check_nop;
2636 }
2637 else
2638 {
2639 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2640 frame->check = slf_check_semaphore_wait;
2641 }
2642}
2643
2644/* signal */
2645
2646static void
2647coro_signal_wake (pTHX_ AV *av, int count)
2648{
2649 SvIVX (AvARRAY (av)[0]) = 0;
2650
2651 /* now signal count waiters */
2652 while (count > 0 && AvFILLp (av) > 0)
2653 {
2654 SV *cb;
2655
2656 /* swap first two elements so we can shift a waiter */
2657 cb = AvARRAY (av)[0];
2658 AvARRAY (av)[0] = AvARRAY (av)[1];
2659 AvARRAY (av)[1] = cb;
2660
2661 cb = av_shift (av);
2662
2663 api_ready (aTHX_ cb);
2664 sv_setiv (cb, 0); /* signal waiter */
2665 SvREFCNT_dec (cb);
2666
2667 --count;
2668 }
2669}
2670
2671static int
2672slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2673{
2674 /* if we are about to throw, also stop waiting */
2675 return SvROK ((SV *)frame->data) && !CORO_THROW;
2676}
2677
2678static void
2679slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2680{
2681 AV *av = (AV *)SvRV (arg [0]);
2682
2683 if (SvIVX (AvARRAY (av)[0]))
2684 {
2685 SvIVX (AvARRAY (av)[0]) = 0;
2686 frame->prepare = prepare_nop;
2687 frame->check = slf_check_nop;
2688 }
2689 else
2690 {
2691 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2692
2693 av_push (av, waiter);
2694
2695 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2696 frame->prepare = prepare_schedule;
2697 frame->check = slf_check_signal_wait;
2698 }
2699}
2700
2701/*****************************************************************************/
2702/* Coro::AIO */
2703
2704#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2705
2706/* helper storage struct */
2707struct io_state
2708{
2709 int errorno;
2710 I32 laststype; /* U16 in 5.10.0 */
2711 int laststatval;
2712 Stat_t statcache;
2713};
2714
2715static void
2716coro_aio_callback (pTHX_ CV *cv)
2717{
2718 dXSARGS;
2719 AV *state = (AV *)GENSUB_ARG;
2720 SV *coro = av_pop (state);
2721 SV *data_sv = newSV (sizeof (struct io_state));
2722
2723 av_extend (state, items - 1);
2724
2725 sv_upgrade (data_sv, SVt_PV);
2726 SvCUR_set (data_sv, sizeof (struct io_state));
2727 SvPOK_only (data_sv);
2728
2729 {
2730 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2731
2732 data->errorno = errno;
2733 data->laststype = PL_laststype;
2734 data->laststatval = PL_laststatval;
2735 data->statcache = PL_statcache;
2736 }
2737
2738 /* now build the result vector out of all the parameters and the data_sv */
2739 {
2740 int i;
2741
2742 for (i = 0; i < items; ++i)
2743 av_push (state, SvREFCNT_inc_NN (ST (i)));
2744 }
2745
2746 av_push (state, data_sv);
2747
2748 api_ready (aTHX_ coro);
2749 SvREFCNT_dec (coro);
2750 SvREFCNT_dec ((AV *)state);
2751}
2752
2753static int
2754slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2755{
2756 AV *state = (AV *)frame->data;
2757
2758 /* if we are about to throw, return early */
2759 /* this does not cancel the aio request, but at least */
2760 /* it quickly returns */
2761 if (CORO_THROW)
1046 return 0; 2762 return 0;
1047}
1048 2763
1049static void 2764 /* one element that is an RV? repeat! */
1050api_schedule (void) 2765 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
1051{
1052 struct transfer_args ta;
1053
1054 prepare_schedule (&ta);
1055 TRANSFER (ta);
1056}
1057
1058static int
1059api_cede (void)
1060{
1061 struct transfer_args ta;
1062
1063 prepare_cede (&ta);
1064
1065 if (ta.prev != ta.next)
1066 {
1067 TRANSFER (ta);
1068 return 1; 2766 return 1;
2767
2768 /* restore status */
2769 {
2770 SV *data_sv = av_pop (state);
2771 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2772
2773 errno = data->errorno;
2774 PL_laststype = data->laststype;
2775 PL_laststatval = data->laststatval;
2776 PL_statcache = data->statcache;
2777
2778 SvREFCNT_dec (data_sv);
1069 } 2779 }
1070 else 2780
2781 /* push result values */
2782 {
2783 dSP;
2784 int i;
2785
2786 EXTEND (SP, AvFILLp (state) + 1);
2787 for (i = 0; i <= AvFILLp (state); ++i)
2788 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2789
2790 PUTBACK;
2791 }
2792
1071 return 0; 2793 return 0;
1072} 2794}
1073 2795
1074static int 2796static void
1075api_cede_notself (void) 2797slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1076{ 2798{
1077 struct transfer_args ta; 2799 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2800 SV *coro_hv = SvRV (coro_current);
2801 struct coro *coro = SvSTATE_hv (coro_hv);
1078 2802
1079 if (prepare_cede_notself (&ta)) 2803 /* put our coroutine id on the state arg */
1080 { 2804 av_push (state, SvREFCNT_inc_NN (coro_hv));
1081 TRANSFER (ta); 2805
1082 return 1; 2806 /* first see whether we have a non-zero priority and set it as AIO prio */
2807 if (coro->prio)
1083 } 2808 {
1084 else 2809 dSP;
1085 return 0;
1086}
1087 2810
2811 static SV *prio_cv;
2812 static SV *prio_sv;
2813
2814 if (expect_false (!prio_cv))
2815 {
2816 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2817 prio_sv = newSViv (0);
2818 }
2819
2820 PUSHMARK (SP);
2821 sv_setiv (prio_sv, coro->prio);
2822 XPUSHs (prio_sv);
2823
2824 PUTBACK;
2825 call_sv (prio_cv, G_VOID | G_DISCARD);
2826 }
2827
2828 /* now call the original request */
2829 {
2830 dSP;
2831 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2832 int i;
2833
2834 PUSHMARK (SP);
2835
2836 /* first push all args to the stack */
2837 EXTEND (SP, items + 1);
2838
2839 for (i = 0; i < items; ++i)
2840 PUSHs (arg [i]);
2841
2842 /* now push the callback closure */
2843 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2844
2845 /* now call the AIO function - we assume our request is uncancelable */
2846 PUTBACK;
2847 call_sv ((SV *)req, G_VOID | G_DISCARD);
2848 }
2849
2850 /* now that the requets is going, we loop toll we have a result */
2851 frame->data = (void *)state;
2852 frame->prepare = prepare_schedule;
2853 frame->check = slf_check_aio_req;
2854}
2855
2856static void
2857coro_aio_req_xs (pTHX_ CV *cv)
2858{
2859 dXSARGS;
2860
2861 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2862
2863 XSRETURN_EMPTY;
2864}
2865
2866/*****************************************************************************/
2867
2868#if CORO_CLONE
2869# include "clone.c"
2870#endif
2871
1088MODULE = Coro::State PACKAGE = Coro::State 2872MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1089 2873
1090PROTOTYPES: DISABLE 2874PROTOTYPES: DISABLE
1091 2875
1092BOOT: 2876BOOT:
1093{ 2877{
1094#ifdef USE_ITHREADS 2878#ifdef USE_ITHREADS
1095 MUTEX_INIT (&coro_mutex); 2879# if CORO_PTHREAD
2880 coro_thx = PERL_GET_CONTEXT;
2881# endif
1096#endif 2882#endif
1097 BOOT_PAGESIZE; 2883 BOOT_PAGESIZE;
1098 2884
2885 cctx_current = cctx_new_empty ();
2886
2887 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2888 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2889
2890 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2891 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2892 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2893
2894 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2895 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2896 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2897
1099 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2898 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1100 2899
2900 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2901 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1101 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2902 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1102 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1103 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1104 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1105 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2903 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1106 2904
1107 main_mainstack = PL_mainstack; 2905 main_mainstack = PL_mainstack;
2906 main_top_env = PL_top_env;
1108 2907
2908 while (main_top_env->je_prev)
2909 main_top_env = main_top_env->je_prev;
2910
2911 {
2912 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2913
2914 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2915 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2916
2917 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2918 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2919 }
2920
1109 coroapi.ver = CORO_API_VERSION; 2921 coroapi.ver = CORO_API_VERSION;
2922 coroapi.rev = CORO_API_REVISION;
2923
1110 coroapi.transfer = api_transfer; 2924 coroapi.transfer = api_transfer;
2925
2926 coroapi.sv_state = SvSTATE_;
2927 coroapi.execute_slf = api_execute_slf;
2928 coroapi.prepare_nop = prepare_nop;
2929 coroapi.prepare_schedule = prepare_schedule;
2930 coroapi.prepare_cede = prepare_cede;
2931 coroapi.prepare_cede_notself = prepare_cede_notself;
2932
2933 {
2934 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2935
2936 if (!svp) croak ("Time::HiRes is required");
2937 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2938
2939 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2940 }
1111 2941
1112 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2942 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1113} 2943}
1114 2944
1115SV * 2945SV *
1116new (char *klass, ...) 2946new (char *klass, ...)
2947 ALIAS:
2948 Coro::new = 1
1117 CODE: 2949 CODE:
1118{ 2950{
1119 struct coro *coro; 2951 struct coro *coro;
2952 MAGIC *mg;
1120 HV *hv; 2953 HV *hv;
2954 CV *cb;
1121 int i; 2955 int i;
1122 2956
2957 if (items > 1)
2958 {
2959 cb = coro_sv_2cv (aTHX_ ST (1));
2960
2961 if (!ix)
2962 {
2963 if (CvISXSUB (cb))
2964 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2965
2966 if (!CvROOT (cb))
2967 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2968 }
2969 }
2970
1123 Newz (0, coro, 1, struct coro); 2971 Newz (0, coro, 1, struct coro);
1124 coro->args = newAV (); 2972 coro->args = newAV ();
1125 coro->save = CORO_SAVE_ALL;
1126 coro->flags = CF_NEW; 2973 coro->flags = CF_NEW;
1127 2974
2975 if (coro_first) coro_first->prev = coro;
2976 coro->next = coro_first;
2977 coro_first = coro;
2978
1128 hv = newHV (); 2979 coro->hv = hv = newHV ();
1129 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2980 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2981 mg->mg_flags |= MGf_DUP;
1130 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2982 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1131 2983
2984 if (items > 1)
2985 {
2986 av_extend (coro->args, items - 1 + ix - 1);
2987
2988 if (ix)
2989 {
2990 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2991 cb = cv_coro_run;
2992 }
2993
2994 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2995
1132 for (i = 1; i < items; i++) 2996 for (i = 2; i < items; i++)
1133 av_push (coro->args, newSVsv (ST (i))); 2997 av_push (coro->args, newSVsv (ST (i)));
2998 }
1134} 2999}
1135 OUTPUT: 3000 OUTPUT:
1136 RETVAL 3001 RETVAL
1137 3002
1138int 3003void
1139save (SV *coro, int new_save = -1) 3004transfer (...)
3005 PROTOTYPE: $$
1140 CODE: 3006 CODE:
1141 RETVAL = api_save (coro, new_save); 3007 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3008
3009bool
3010_destroy (SV *coro_sv)
3011 CODE:
3012 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142 OUTPUT: 3013 OUTPUT:
1143 RETVAL 3014 RETVAL
1144 3015
1145void 3016void
1146_set_stacklevel (...)
1147 ALIAS:
1148 Coro::State::transfer = 1
1149 Coro::schedule = 2
1150 Coro::cede = 3
1151 Coro::cede_notself = 4
1152 CODE:
1153{
1154 struct transfer_args ta;
1155
1156 switch (ix)
1157 {
1158 case 0:
1159 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1160 ta.next = 0;
1161 break;
1162
1163 case 1:
1164 if (items != 2)
1165 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1166
1167 prepare_transfer (&ta, ST (0), ST (1));
1168 break;
1169
1170 case 2:
1171 prepare_schedule (&ta);
1172 break;
1173
1174 case 3:
1175 prepare_cede (&ta);
1176 break;
1177
1178 case 4:
1179 if (!prepare_cede_notself (&ta))
1180 XSRETURN_EMPTY;
1181
1182 break;
1183 }
1184
1185 BARRIER;
1186 TRANSFER (ta);
1187}
1188
1189void
1190_clone_state_from (SV *dst, SV *src)
1191 CODE:
1192{
1193 struct coro *coro_src = SvSTATE (src);
1194
1195 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1196
1197 ++coro_src->refcnt;
1198 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1199}
1200
1201void
1202_exit (code) 3017_exit (int code)
1203 int code
1204 PROTOTYPE: $ 3018 PROTOTYPE: $
1205 CODE: 3019 CODE:
1206 _exit (code); 3020 _exit (code);
1207 3021
3022SV *
3023clone (Coro::State coro)
3024 CODE:
3025{
3026#if CORO_CLONE
3027 struct coro *ncoro = coro_clone (aTHX_ coro);
3028 MAGIC *mg;
3029 /* TODO: too much duplication */
3030 ncoro->hv = newHV ();
3031 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3034#else
3035 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3036#endif
3037}
3038 OUTPUT:
3039 RETVAL
3040
3041int
3042cctx_stacksize (int new_stacksize = 0)
3043 PROTOTYPE: ;$
3044 CODE:
3045 RETVAL = cctx_stacksize;
3046 if (new_stacksize)
3047 {
3048 cctx_stacksize = new_stacksize;
3049 ++cctx_gen;
3050 }
3051 OUTPUT:
3052 RETVAL
3053
3054int
3055cctx_max_idle (int max_idle = 0)
3056 PROTOTYPE: ;$
3057 CODE:
3058 RETVAL = cctx_max_idle;
3059 if (max_idle > 1)
3060 cctx_max_idle = max_idle;
3061 OUTPUT:
3062 RETVAL
3063
1208int 3064int
1209cctx_count () 3065cctx_count ()
3066 PROTOTYPE:
1210 CODE: 3067 CODE:
1211 RETVAL = cctx_count; 3068 RETVAL = cctx_count;
1212 OUTPUT: 3069 OUTPUT:
1213 RETVAL 3070 RETVAL
1214 3071
1215int 3072int
1216cctx_idle () 3073cctx_idle ()
3074 PROTOTYPE:
1217 CODE: 3075 CODE:
1218 RETVAL = cctx_idle; 3076 RETVAL = cctx_idle;
1219 OUTPUT: 3077 OUTPUT:
1220 RETVAL 3078 RETVAL
1221 3079
3080void
3081list ()
3082 PROTOTYPE:
3083 PPCODE:
3084{
3085 struct coro *coro;
3086 for (coro = coro_first; coro; coro = coro->next)
3087 if (coro->hv)
3088 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3089}
3090
3091void
3092call (Coro::State coro, SV *coderef)
3093 ALIAS:
3094 eval = 1
3095 CODE:
3096{
3097 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3098 {
3099 struct coro *current = SvSTATE_current;
3100
3101 if (current != coro)
3102 {
3103 PUTBACK;
3104 save_perl (aTHX_ current);
3105 load_perl (aTHX_ coro);
3106 SPAGAIN;
3107 }
3108
3109 PUSHSTACK;
3110
3111 PUSHMARK (SP);
3112 PUTBACK;
3113
3114 if (ix)
3115 eval_sv (coderef, 0);
3116 else
3117 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3118
3119 POPSTACK;
3120 SPAGAIN;
3121
3122 if (current != coro)
3123 {
3124 PUTBACK;
3125 save_perl (aTHX_ coro);
3126 load_perl (aTHX_ current);
3127 SPAGAIN;
3128 }
3129 }
3130}
3131
3132SV *
3133is_ready (Coro::State coro)
3134 PROTOTYPE: $
3135 ALIAS:
3136 is_ready = CF_READY
3137 is_running = CF_RUNNING
3138 is_new = CF_NEW
3139 is_destroyed = CF_DESTROYED
3140 is_suspended = CF_SUSPENDED
3141 CODE:
3142 RETVAL = boolSV (coro->flags & ix);
3143 OUTPUT:
3144 RETVAL
3145
3146void
3147throw (Coro::State self, SV *throw = &PL_sv_undef)
3148 PROTOTYPE: $;$
3149 CODE:
3150{
3151 struct coro *current = SvSTATE_current;
3152 SV **throwp = self == current ? &CORO_THROW : &self->except;
3153 SvREFCNT_dec (*throwp);
3154 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3155}
3156
3157void
3158api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3159 PROTOTYPE: $;$
3160 C_ARGS: aTHX_ coro, flags
3161
3162SV *
3163has_cctx (Coro::State coro)
3164 PROTOTYPE: $
3165 CODE:
3166 /* maybe manage the running flag differently */
3167 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3168 OUTPUT:
3169 RETVAL
3170
3171int
3172is_traced (Coro::State coro)
3173 PROTOTYPE: $
3174 CODE:
3175 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3176 OUTPUT:
3177 RETVAL
3178
3179UV
3180rss (Coro::State coro)
3181 PROTOTYPE: $
3182 ALIAS:
3183 usecount = 1
3184 CODE:
3185 switch (ix)
3186 {
3187 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3188 case 1: RETVAL = coro->usecount; break;
3189 }
3190 OUTPUT:
3191 RETVAL
3192
3193void
3194force_cctx ()
3195 PROTOTYPE:
3196 CODE:
3197 cctx_current->idle_sp = 0;
3198
3199void
3200swap_defsv (Coro::State self)
3201 PROTOTYPE: $
3202 ALIAS:
3203 swap_defav = 1
3204 CODE:
3205 if (!self->slot)
3206 croak ("cannot swap state with coroutine that has no saved state,");
3207 else
3208 {
3209 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3210 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3211
3212 SV *tmp = *src; *src = *dst; *dst = tmp;
3213 }
3214
3215void
3216cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3220
3221
1222MODULE = Coro::State PACKAGE = Coro 3222MODULE = Coro::State PACKAGE = Coro
1223 3223
1224BOOT: 3224BOOT:
1225{ 3225{
1226 int i; 3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1227 3235
3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3240
1228 coro_stash = gv_stashpv ("Coro", TRUE); 3241 coro_stash = gv_stashpv ("Coro", TRUE);
1229 3242
1230 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1231 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1232 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1233 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1234 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1235 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1236 3249
1237 coro_current = get_sv ("Coro::current", FALSE);
1238 SvREADONLY_on (coro_current);
1239
1240 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1241 coro_ready[i] = newAV ();
1242
1243 { 3250 {
1244 SV *sv = perl_get_sv("Coro::API", 1); 3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1245 3252
1246 coroapi.schedule = api_schedule; 3253 coroapi.schedule = api_schedule;
1247 coroapi.save = api_save; 3254 coroapi.schedule_to = api_schedule_to;
1248 coroapi.cede = api_cede; 3255 coroapi.cede = api_cede;
1249 coroapi.cede_notself = api_cede_notself; 3256 coroapi.cede_notself = api_cede_notself;
1250 coroapi.ready = api_ready; 3257 coroapi.ready = api_ready;
1251 coroapi.is_ready = api_is_ready; 3258 coroapi.is_ready = api_is_ready;
1252 coroapi.nready = &coro_nready; 3259 coroapi.nready = coro_nready;
1253 coroapi.current = coro_current; 3260 coroapi.current = coro_current;
1254 3261
1255 GCoroAPI = &coroapi; 3262 /*GCoroAPI = &coroapi;*/
1256 sv_setiv (sv, (IV)&coroapi); 3263 sv_setiv (sv, (IV)&coroapi);
1257 SvREADONLY_on (sv); 3264 SvREADONLY_on (sv);
1258 } 3265 }
1259} 3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1260 3297
1261void 3298void
1262_set_current (SV *current) 3299_set_current (SV *current)
1263 PROTOTYPE: $ 3300 PROTOTYPE: $
1264 CODE: 3301 CODE:
1265 SvREFCNT_dec (SvRV (coro_current)); 3302 SvREFCNT_dec (SvRV (coro_current));
1266 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3304
3305void
3306_set_readyhook (SV *hook)
3307 PROTOTYPE: $
3308 CODE:
3309 SvREFCNT_dec (coro_readyhook);
3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1267 3311
1268int 3312int
1269prio (Coro::State coro, int newprio = 0) 3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
1270 ALIAS: 3315 ALIAS:
1271 nice = 1 3316 nice = 1
1272 CODE: 3317 CODE:
1273{ 3318{
1274 RETVAL = coro->prio; 3319 RETVAL = coro->prio;
… …
1289 3334
1290SV * 3335SV *
1291ready (SV *self) 3336ready (SV *self)
1292 PROTOTYPE: $ 3337 PROTOTYPE: $
1293 CODE: 3338 CODE:
1294 RETVAL = boolSV (api_ready (self)); 3339 RETVAL = boolSV (api_ready (aTHX_ self));
1295 OUTPUT:
1296 RETVAL
1297
1298SV *
1299is_ready (SV *self)
1300 PROTOTYPE: $
1301 CODE:
1302 RETVAL = boolSV (api_is_ready (self));
1303 OUTPUT: 3340 OUTPUT:
1304 RETVAL 3341 RETVAL
1305 3342
1306int 3343int
1307nready (...) 3344nready (...)
… …
1309 CODE: 3346 CODE:
1310 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1311 OUTPUT: 3348 OUTPUT:
1312 RETVAL 3349 RETVAL
1313 3350
1314MODULE = Coro::State PACKAGE = Coro::AIO 3351void
3352suspend (Coro::State self)
3353 PROTOTYPE: $
3354 CODE:
3355 self->flags |= CF_SUSPENDED;
3356
3357void
3358resume (Coro::State self)
3359 PROTOTYPE: $
3360 CODE:
3361 self->flags &= ~CF_SUSPENDED;
3362
3363void
3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3367
3368void
3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
3377
3378 av_extend (av, items - 2);
3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
3381
3382 if ((SV *)hv == &PL_sv_undef)
3383 {
3384 PUSHMARK (SP);
3385 EXTEND (SP, 2);
3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3393 }
3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
3409 SvREFCNT_dec (hv);
3410}
1315 3411
1316SV * 3412SV *
1317_get_state () 3413rouse_cb ()
3414 PROTOTYPE:
1318 CODE: 3415 CODE:
1319{ 3416 RETVAL = coro_new_rouse_cb (aTHX);
1320 struct io_state *data;
1321
1322 RETVAL = newSV (sizeof (struct io_state));
1323 data = (struct io_state *)SvPVX (RETVAL);
1324 SvCUR_set (RETVAL, sizeof (struct io_state));
1325 SvPOK_only (RETVAL);
1326
1327 data->errorno = errno;
1328 data->laststype = PL_laststype;
1329 data->laststatval = PL_laststatval;
1330 data->statcache = PL_statcache;
1331}
1332 OUTPUT: 3417 OUTPUT:
1333 RETVAL 3418 RETVAL
1334 3419
1335void 3420void
1336_set_state (char *data_) 3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
1337 PROTOTYPE: $ 3430 PROTOTYPE: &
1338 CODE: 3431 CODE:
1339{ 3432{
1340 struct io_state *data = (void *)data_; 3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1341 3435
1342 errno = data->errorno; 3436 block = (SV *)coro_sv_2cv (aTHX_ block);
1343 PL_laststype = data->laststype;
1344 PL_laststatval = data->laststatval;
1345 PL_statcache = data->statcache;
1346}
1347 3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
3489 CODE:
3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3491
3492void
3493down (...)
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
3529 else
3530 {
3531 int i;
3532 EXTEND (SP, wcount);
3533 for (i = 1; i <= wcount; ++i)
3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3535 }
3536}
3537
3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
3540void
3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
3558 CODE:
3559 RETVAL = sv_bless (
3560 coro_waitarray_new (aTHX_ 0),
3561 GvSTASH (CvGV (cv))
3562 );
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
3593 CODE:
3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3595 OUTPUT:
3596 RETVAL
3597
3598
3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
3600
3601BOOT:
3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3603
3604void
3605_schedule (...)
3606 CODE:
3607{
3608 static int incede;
3609
3610 api_cede_notself (aTHX);
3611
3612 ++incede;
3613 while (coro_nready >= incede && api_cede (aTHX))
3614 ;
3615
3616 sv_setsv (sv_activity, &PL_sv_undef);
3617 if (coro_nready >= incede)
3618 {
3619 PUSHMARK (SP);
3620 PUTBACK;
3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3622 }
3623
3624 --incede;
3625}
3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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