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Comparing Coro/Coro/State.xs (file contents):
Revision 1.192 by root, Fri Oct 5 21:51:40 2007 UTC vs.
Revision 1.307 by root, Wed Nov 19 14:34:46 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#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
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 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
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD 110# undef CORO_STACKGUARD
90#endif 111#endif
91 112
92#ifndef CORO_STACKGUARD 113#ifndef CORO_STACKGUARD
… …
98# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 120#endif
100 121
101/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
103#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
104#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
105 131
106#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
107 133
108#if __GNUC__ >= 3 134#if __GNUC__ >= 3
109# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
110# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
111#else 138#else
112# define attribute(x) 139# define attribute(x)
113# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
114#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
115 146
116#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
117 148
118#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
119 151
120#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
121static perl_mutex coro_mutex; 153# if CORO_PTHREAD
122# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
123# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
124#else
125# define LOCK (void)0
126# define UNLOCK (void)0
127#endif 155# endif
156#endif
128 157
129/* helper storage struct for Coro::AIO */ 158static double (*nvtime)(); /* so why doesn't it take void? */
130struct io_state
131{
132 int errorno;
133 I32 laststype;
134 int laststatval;
135 Stat_t statcache;
136};
137 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
138static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
139static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
140static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
141static JMPENV *main_top_env; 168static JMPENV *main_top_env;
142static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
143static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
144 171
145static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
146static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
147 177
148/* async_pool helper stuff */ 178/* async_pool helper stuff */
149static SV *sv_pool_rss; 179static SV *sv_pool_rss;
150static SV *sv_pool_size; 180static SV *sv_pool_size;
151static AV *av_async_pool; 181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
152 185
153static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
154static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
155 188
156enum { 189enum {
… …
161 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
162 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
163}; 196};
164 197
165/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
166typedef struct coro_cctx { 199typedef struct coro_cctx
200{
167 struct coro_cctx *next; 201 struct coro_cctx *next;
168 202
169 /* the stack */ 203 /* the stack */
170 void *sptr; 204 void *sptr;
171 size_t ssize; 205 size_t ssize;
… …
174 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
175 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
176 JMPENV *top_env; 210 JMPENV *top_env;
177 coro_context cctx; 211 coro_context cctx;
178 212
213 U32 gen;
179#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
180 int valgrind_id; 215 int valgrind_id;
181#endif 216#endif
182 unsigned char flags; 217 unsigned char flags;
183} coro_cctx; 218} coro_cctx;
… …
187 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
188 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
189 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
190}; 225};
191 226
192/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
193struct coro { 228typedef struct
194 /* the c coroutine allocated to this perl coroutine, if any */ 229{
195 coro_cctx *cctx; 230 SV *defsv;
196 231 AV *defav;
197 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
198 AV *args; 233 SV *irsgv;
199 int refcnt;
200 int flags; /* CF_ flags */
201
202 /* optionally saved, might be zero */
203 AV *defav; /* @_ */
204 SV *defsv; /* $_ */
205 SV *errsv; /* $@ */
206 SV *deffh; /* default filehandle */
207 SV *irssv; /* $/ */
208 SV *irssv_sv; /* real $/ cache */
209
210#define VAR(name,type) type name; 234#define VAR(name,type) type name;
211# include "state.h" 235# include "state.h"
212#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 CV *startcv; /* the CV to execute */
252 AV *args; /* data associated with this coroutine (initial args) */
253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
213 257
214 /* statistics */ 258 /* statistics */
215 int usecount; /* number of transfers to this coro */ 259 int usecount; /* number of transfers to this coro */
216 260
217 /* coro process data */ 261 /* coro process data */
218 int prio; 262 int prio;
219 //SV *throw; 263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
220 265
221 /* async_pool */ 266 /* async_pool */
222 SV *saved_deffh; 267 SV *saved_deffh;
223 268
224 /* linked list */ 269 /* linked list */
225 struct coro *next, *prev; 270 struct coro *next, *prev;
226 HV *hv; /* the perl hash associated with this coro, if any */
227}; 271};
228 272
229typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
230typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the mainr easonw e don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
231 280
232/** Coro ********************************************************************/ 281/** Coro ********************************************************************/
233 282
234#define PRIO_MAX 3 283#define PRIO_MAX 3
235#define PRIO_HIGH 1 284#define PRIO_HIGH 1
… …
238#define PRIO_IDLE -3 287#define PRIO_IDLE -3
239#define PRIO_MIN -4 288#define PRIO_MIN -4
240 289
241/* for Coro.pm */ 290/* for Coro.pm */
242static SV *coro_current; 291static SV *coro_current;
292static SV *coro_readyhook;
243static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
244static int coro_nready;
245static struct coro *coro_first; 294static struct coro *coro_first;
295#define coro_nready coroapi.nready
246 296
247/** lowlevel stuff **********************************************************/ 297/** lowlevel stuff **********************************************************/
298
299static SV *
300coro_get_sv (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_sv (name, create);
305#endif
306 return get_sv (name, create);
307}
308
309static AV *
310coro_get_av (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_av (name, create);
315#endif
316 return get_av (name, create);
317}
318
319static HV *
320coro_get_hv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_hv (name, create);
325#endif
326 return get_hv (name, create);
327}
328
329/* may croak */
330INLINE CV *
331coro_sv_2cv (SV *sv)
332{
333 HV *st;
334 GV *gvp;
335 return sv_2cv (sv, &st, &gvp, 0);
336}
248 337
249static AV * 338static AV *
250coro_clone_padlist (pTHX_ CV *cv) 339coro_clone_padlist (pTHX_ CV *cv)
251{ 340{
252 AV *padlist = CvPADLIST (cv); 341 AV *padlist = CvPADLIST (cv);
253 AV *newpadlist, *newpad; 342 AV *newpadlist, *newpad;
254 343
255 newpadlist = newAV (); 344 newpadlist = newAV ();
256 AvREAL_off (newpadlist); 345 AvREAL_off (newpadlist);
257#if PERL_VERSION_ATLEAST (5,9,0) 346#if PERL_VERSION_ATLEAST (5,10,0)
258 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
259#else 348#else
260 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
261#endif 350#endif
262 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
263 --AvFILLp (padlist); 352 --AvFILLp (padlist);
264 353
265 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
266 av_store (newpadlist, 1, (SV *)newpad); 355 av_store (newpadlist, 1, (SV *)newpad);
267 356
268 return newpadlist; 357 return newpadlist;
269} 358}
270 359
… …
300 389
301 /* casting is fun. */ 390 /* casting is fun. */
302 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
303 free_padlist (aTHX_ padlist); 392 free_padlist (aTHX_ padlist);
304 393
305 SvREFCNT_dec (av); 394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
306 395
307 return 0; 396 return 0;
308} 397}
309 398
399#define CORO_MAGIC_type_cv 26
310#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_state PERL_MAGIC_ext
311 401
312static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
313 406
314#define CORO_MAGIC(cv) \ 407#define CORO_MAGIC_NN(sv, type) \
408 (expect_true (SvMAGIC (sv)->mg_type == type) \
315 SvMAGIC (cv) \ 409 ? SvMAGIC (sv) \
316 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 410 : mg_find (sv, type))
317 ? SvMAGIC (cv) \ 411
318 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 412#define CORO_MAGIC(sv, type) \
413 (expect_true (SvMAGIC (sv)) \
414 ? CORO_MAGIC_NN (sv, type) \
319 : 0 415 : 0)
320 416
321static struct coro * 417#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
418#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
419
420INLINE struct coro *
322SvSTATE_ (pTHX_ SV *coro) 421SvSTATE_ (pTHX_ SV *coro)
323{ 422{
324 HV *stash; 423 HV *stash;
325 MAGIC *mg; 424 MAGIC *mg;
326 425
327 if (SvROK (coro)) 426 if (SvROK (coro))
328 coro = SvRV (coro); 427 coro = SvRV (coro);
329 428
330 if (SvTYPE (coro) != SVt_PVHV) 429 if (expect_false (SvTYPE (coro) != SVt_PVHV))
331 croak ("Coro::State object required"); 430 croak ("Coro::State object required");
332 431
333 stash = SvSTASH (coro); 432 stash = SvSTASH (coro);
334 if (stash != coro_stash && stash != coro_state_stash) 433 if (expect_false (stash != coro_stash && stash != coro_state_stash))
335 { 434 {
336 /* very slow, but rare, check */ 435 /* very slow, but rare, check */
337 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 436 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
338 croak ("Coro::State object required"); 437 croak ("Coro::State object required");
339 } 438 }
340 439
341 mg = CORO_MAGIC (coro); 440 mg = CORO_MAGIC_state (coro);
342 return (struct coro *)mg->mg_ptr; 441 return (struct coro *)mg->mg_ptr;
343} 442}
344 443
345#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 444#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
346 445
446/* faster than SvSTATE, but expects a coroutine hv */
447#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
448#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
449
347/* the next two functions merely cache the padlists */ 450/* the next two functions merely cache the padlists */
348static void 451static void
349get_padlist (pTHX_ CV *cv) 452get_padlist (pTHX_ CV *cv)
350{ 453{
351 MAGIC *mg = CORO_MAGIC (cv); 454 MAGIC *mg = CORO_MAGIC_cv (cv);
352 AV *av; 455 AV *av;
353 456
354 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 457 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
355 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 458 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
356 else 459 else
357 { 460 {
358#if CORO_PREFER_PERL_FUNCTIONS 461#if CORO_PREFER_PERL_FUNCTIONS
359 /* this is probably cleaner, but also slower? */ 462 /* this is probably cleaner? but also slower! */
463 /* in practise, it seems to be less stable */
360 CV *cp = Perl_cv_clone (cv); 464 CV *cp = Perl_cv_clone (aTHX_ cv);
361 CvPADLIST (cv) = CvPADLIST (cp); 465 CvPADLIST (cv) = CvPADLIST (cp);
362 CvPADLIST (cp) = 0; 466 CvPADLIST (cp) = 0;
363 SvREFCNT_dec (cp); 467 SvREFCNT_dec (cp);
364#else 468#else
365 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 469 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
368} 472}
369 473
370static void 474static void
371put_padlist (pTHX_ CV *cv) 475put_padlist (pTHX_ CV *cv)
372{ 476{
373 MAGIC *mg = CORO_MAGIC (cv); 477 MAGIC *mg = CORO_MAGIC_cv (cv);
374 AV *av; 478 AV *av;
375 479
376 if (!mg) 480 if (expect_false (!mg))
377 { 481 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
378 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
379 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
380 mg->mg_virtual = &vtbl_coro;
381 mg->mg_obj = (SV *)newAV ();
382 }
383 482
384 av = (AV *)mg->mg_obj; 483 av = (AV *)mg->mg_obj;
385 484
386 if (AvFILLp (av) >= AvMAX (av)) 485 if (expect_false (AvFILLp (av) >= AvMAX (av)))
387 av_extend (av, AvMAX (av) + 1); 486 av_extend (av, AvMAX (av) + 1);
388 487
389 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 488 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
390} 489}
391 490
392/** load & save, init *******************************************************/ 491/** load & save, init *******************************************************/
393 492
394static void 493static void
395load_perl (pTHX_ Coro__State c) 494load_perl (pTHX_ Coro__State c)
396{ 495{
496 perl_slots *slot = c->slot;
497 c->slot = 0;
498
499 PL_mainstack = c->mainstack;
500
501 GvSV (PL_defgv) = slot->defsv;
502 GvAV (PL_defgv) = slot->defav;
503 GvSV (PL_errgv) = slot->errsv;
504 GvSV (irsgv) = slot->irsgv;
505
397#define VAR(name,type) PL_ ## name = c->name; 506 #define VAR(name,type) PL_ ## name = slot->name;
398# include "state.h" 507 # include "state.h"
399#undef VAR 508 #undef VAR
400
401 GvSV (PL_defgv) = c->defsv;
402 GvAV (PL_defgv) = c->defav;
403 GvSV (PL_errgv) = c->errsv;
404 GvSV (irsgv) = c->irssv_sv;
405 509
406 { 510 {
407 dSP; 511 dSP;
512
408 CV *cv; 513 CV *cv;
409 514
410 /* now do the ugly restore mess */ 515 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 516 while (expect_true (cv = (CV *)POPs))
412 { 517 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 518 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 519 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 520 CvPADLIST (cv) = (AV *)POPs;
416 } 521 }
417 522
418 PUTBACK; 523 PUTBACK;
419 } 524 }
525
526 slf_frame = c->slf_frame;
527 CORO_THROW = c->except;
420} 528}
421 529
422static void 530static void
423save_perl (pTHX_ Coro__State c) 531save_perl (pTHX_ Coro__State c)
424{ 532{
533 c->except = CORO_THROW;
534 c->slf_frame = slf_frame;
535
425 { 536 {
426 dSP; 537 dSP;
427 I32 cxix = cxstack_ix; 538 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 539 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 540 PERL_SI *top_si = PL_curstackinfo;
… …
435 546
436 XPUSHs (Nullsv); 547 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 548 /* this loop was inspired by pp_caller */
438 for (;;) 549 for (;;)
439 { 550 {
440 while (cxix >= 0) 551 while (expect_true (cxix >= 0))
441 { 552 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 553 PERL_CONTEXT *cx = &ccstk[cxix--];
443 554
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 555 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
445 { 556 {
446 CV *cv = cx->blk_sub.cv; 557 CV *cv = cx->blk_sub.cv;
447 558
448 if (CvDEPTH (cv)) 559 if (expect_true (CvDEPTH (cv)))
449 { 560 {
450 EXTEND (SP, 3); 561 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 562 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 563 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 564 PUSHs ((SV *)cv);
454 565
455 CvDEPTH (cv) = 0; 566 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 567 get_padlist (aTHX_ cv);
457 } 568 }
458 } 569 }
459 } 570 }
460 571
461 if (top_si->si_type == PERLSI_MAIN) 572 if (expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 573 break;
463 574
464 top_si = top_si->si_prev; 575 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 576 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 577 cxix = top_si->si_cxix;
467 } 578 }
468 579
469 PUTBACK; 580 PUTBACK;
470 } 581 }
471 582
583 /* allocate some space on the context stack for our purposes */
584 /* we manually unroll here, as usually 2 slots is enough */
585 if (SLOT_COUNT >= 1) CXINC;
586 if (SLOT_COUNT >= 2) CXINC;
587 if (SLOT_COUNT >= 3) CXINC;
588 {
589 int i;
590 for (i = 3; i < SLOT_COUNT; ++i)
591 CXINC;
592 }
593 cxstack_ix -= SLOT_COUNT; /* undo allocation */
594
595 c->mainstack = PL_mainstack;
596
597 {
598 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
599
472 c->defav = GvAV (PL_defgv); 600 slot->defav = GvAV (PL_defgv);
473 c->defsv = DEFSV; 601 slot->defsv = DEFSV;
474 c->errsv = ERRSV; 602 slot->errsv = ERRSV;
475 c->irssv_sv = GvSV (irsgv); 603 slot->irsgv = GvSV (irsgv);
476 604
477#define VAR(name,type)c->name = PL_ ## name; 605 #define VAR(name,type) slot->name = PL_ ## name;
478# include "state.h" 606 # include "state.h"
479#undef VAR 607 #undef VAR
608 }
480} 609}
481 610
482/* 611/*
483 * allocate various perl stacks. This is an exact copy 612 * allocate various perl stacks. This is almost an exact copy
484 * of perl.c:init_stacks, except that it uses less memory 613 * of perl.c:init_stacks, except that it uses less memory
485 * on the (sometimes correct) assumption that coroutines do 614 * on the (sometimes correct) assumption that coroutines do
486 * not usually need a lot of stackspace. 615 * not usually need a lot of stackspace.
487 */ 616 */
488#if CORO_PREFER_PERL_FUNCTIONS 617#if CORO_PREFER_PERL_FUNCTIONS
489# define coro_init_stacks init_stacks 618# define coro_init_stacks(thx) init_stacks ()
490#else 619#else
491static void 620static void
492coro_init_stacks (pTHX) 621coro_init_stacks (pTHX)
493{ 622{
494 PL_curstackinfo = new_stackinfo(64, 6); 623 PL_curstackinfo = new_stackinfo(32, 8);
495 PL_curstackinfo->si_type = PERLSI_MAIN; 624 PL_curstackinfo->si_type = PERLSI_MAIN;
496 PL_curstack = PL_curstackinfo->si_stack; 625 PL_curstack = PL_curstackinfo->si_stack;
497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 626 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
498 627
499 PL_stack_base = AvARRAY(PL_curstack); 628 PL_stack_base = AvARRAY(PL_curstack);
500 PL_stack_sp = PL_stack_base; 629 PL_stack_sp = PL_stack_base;
501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 630 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
502 631
503 New(50,PL_tmps_stack,64,SV*); 632 New(50,PL_tmps_stack,32,SV*);
504 PL_tmps_floor = -1; 633 PL_tmps_floor = -1;
505 PL_tmps_ix = -1; 634 PL_tmps_ix = -1;
506 PL_tmps_max = 64; 635 PL_tmps_max = 32;
507 636
508 New(54,PL_markstack,16,I32); 637 New(54,PL_markstack,16,I32);
509 PL_markstack_ptr = PL_markstack; 638 PL_markstack_ptr = PL_markstack;
510 PL_markstack_max = PL_markstack + 16; 639 PL_markstack_max = PL_markstack + 16;
511 640
512#ifdef SET_MARK_OFFSET 641#ifdef SET_MARK_OFFSET
513 SET_MARK_OFFSET; 642 SET_MARK_OFFSET;
514#endif 643#endif
515 644
516 New(54,PL_scopestack,16,I32); 645 New(54,PL_scopestack,8,I32);
517 PL_scopestack_ix = 0; 646 PL_scopestack_ix = 0;
518 PL_scopestack_max = 16; 647 PL_scopestack_max = 8;
519 648
520 New(54,PL_savestack,64,ANY); 649 New(54,PL_savestack,24,ANY);
521 PL_savestack_ix = 0; 650 PL_savestack_ix = 0;
522 PL_savestack_max = 64; 651 PL_savestack_max = 24;
523 652
524#if !PERL_VERSION_ATLEAST (5,9,0) 653#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,4,OP*); 654 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 655 PL_retstack_ix = 0;
527 PL_retstack_max = 4; 656 PL_retstack_max = 4;
528#endif 657#endif
529} 658}
… …
531 660
532/* 661/*
533 * destroy the stacks, the callchain etc... 662 * destroy the stacks, the callchain etc...
534 */ 663 */
535static void 664static void
536coro_destroy_stacks (pTHX) 665coro_destruct_stacks (pTHX)
537{ 666{
538 while (PL_curstackinfo->si_next) 667 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 668 PL_curstackinfo = PL_curstackinfo->si_next;
540 669
541 while (PL_curstackinfo) 670 while (PL_curstackinfo)
… …
552 681
553 Safefree (PL_tmps_stack); 682 Safefree (PL_tmps_stack);
554 Safefree (PL_markstack); 683 Safefree (PL_markstack);
555 Safefree (PL_scopestack); 684 Safefree (PL_scopestack);
556 Safefree (PL_savestack); 685 Safefree (PL_savestack);
557#if !PERL_VERSION_ATLEAST (5,9,0) 686#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree (PL_retstack); 687 Safefree (PL_retstack);
559#endif 688#endif
560} 689}
561 690
562static size_t 691static size_t
… …
564{ 693{
565 size_t rss = sizeof (*coro); 694 size_t rss = sizeof (*coro);
566 695
567 if (coro->mainstack) 696 if (coro->mainstack)
568 { 697 {
698 perl_slots tmp_slot;
699 perl_slots *slot;
700
569 if (coro->flags & CF_RUNNING) 701 if (coro->flags & CF_RUNNING)
570 { 702 {
703 slot = &tmp_slot;
704
571 #define VAR(name,type)coro->name = PL_ ## name; 705 #define VAR(name,type) slot->name = PL_ ## name;
572 # include "state.h" 706 # include "state.h"
573 #undef VAR 707 #undef VAR
574 } 708 }
709 else
710 slot = coro->slot;
575 711
712 if (slot)
713 {
576 rss += sizeof (coro->curstackinfo); 714 rss += sizeof (slot->curstackinfo);
577 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
578 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 715 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
579 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 716 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
580 rss += coro->tmps_max * sizeof (SV *); 717 rss += slot->tmps_max * sizeof (SV *);
581 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 718 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
582 rss += coro->scopestack_max * sizeof (I32); 719 rss += slot->scopestack_max * sizeof (I32);
583 rss += coro->savestack_max * sizeof (ANY); 720 rss += slot->savestack_max * sizeof (ANY);
584 721
585#if !PERL_VERSION_ATLEAST (5,9,0) 722#if !PERL_VERSION_ATLEAST (5,10,0)
586 rss += coro->retstack_max * sizeof (OP *); 723 rss += slot->retstack_max * sizeof (OP *);
587#endif 724#endif
725 }
588 } 726 }
589 727
590 return rss; 728 return rss;
591} 729}
592 730
593/** coroutine stack handling ************************************************/ 731/** coroutine stack handling ************************************************/
594 732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
742#endif
743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
595static void 753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
769 }
770 }
771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
775static int
776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
781 {
782 SV **svp = 0;
783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
799static int
800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
596coro_setup (pTHX_ struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
597{ 840{
598 /* 841 /*
599 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
600 */ 843 */
… …
603 PL_runops = RUNOPS_DEFAULT; 846 PL_runops = RUNOPS_DEFAULT;
604 PL_curcop = &PL_compiling; 847 PL_curcop = &PL_compiling;
605 PL_in_eval = EVAL_NULL; 848 PL_in_eval = EVAL_NULL;
606 PL_comppad = 0; 849 PL_comppad = 0;
607 PL_curpm = 0; 850 PL_curpm = 0;
851 PL_curpad = 0;
608 PL_localizing = 0; 852 PL_localizing = 0;
609 PL_dirty = 0; 853 PL_dirty = 0;
610 PL_restartop = 0; 854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
611 862
612 GvSV (PL_defgv) = newSV (0); 863 GvSV (PL_defgv) = newSV (0);
613 GvAV (PL_defgv) = coro->args; coro->args = 0; 864 GvAV (PL_defgv) = coro->args; coro->args = 0;
614 GvSV (PL_errgv) = newSV (0); 865 GvSV (PL_errgv) = newSV (0);
615 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
616 PL_rs = newSVsv (GvSV (irsgv)); 867 PL_rs = newSVsv (GvSV (irsgv));
617 PL_defoutgv = SvREFCNT_inc (stdoutgv); 868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
618
619 ENTER; /* necessary e.g. for dounwind */
620 869
621 { 870 {
622 dSP; 871 dSP;
623 LOGOP myop; 872 UNOP myop;
624 873
625 Zero (&myop, 1, LOGOP); 874 Zero (&myop, 1, UNOP);
626 myop.op_next = Nullop; 875 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID; 876 myop.op_flags = OPf_WANT_VOID;
628 877
629 PUSHMARK (SP); 878 PUSHMARK (SP);
630 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
631 PUTBACK; 880 PUTBACK;
632 PL_op = (OP *)&myop; 881 PL_op = (OP *)&myop;
633 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
634 SPAGAIN; 883 SPAGAIN;
635 } 884 }
636}
637 885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
638static void 904static void
639coro_destroy (pTHX_ struct coro *coro) 905coro_destruct (pTHX_ struct coro *coro)
640{ 906{
641 if (!IN_DESTRUCT) 907 if (!IN_DESTRUCT)
642 { 908 {
643 /* restore all saved variables and stuff */ 909 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 910 LEAVE_SCOPE (0);
… …
660 SvREFCNT_dec (GvSV (PL_errgv)); 926 SvREFCNT_dec (GvSV (PL_errgv));
661 SvREFCNT_dec (PL_defoutgv); 927 SvREFCNT_dec (PL_defoutgv);
662 SvREFCNT_dec (PL_rs); 928 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv)); 929 SvREFCNT_dec (GvSV (irsgv));
664 930
931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
934 SvREFCNT_dec (CORO_THROW);
665 SvREFCNT_dec (coro->saved_deffh); 935 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 936 SvREFCNT_dec (coro->rouse_cb);
667 937
668 coro_destroy_stacks (aTHX); 938 coro_destruct_stacks (aTHX);
669} 939}
670 940
671static void 941INLINE void
672free_coro_mortal (pTHX) 942free_coro_mortal (pTHX)
673{ 943{
674 if (coro_mortal) 944 if (expect_true (coro_mortal))
675 { 945 {
676 SvREFCNT_dec (coro_mortal); 946 SvREFCNT_dec (coro_mortal);
677 coro_mortal = 0; 947 coro_mortal = 0;
678 } 948 }
679} 949}
… …
681static int 951static int
682runops_trace (pTHX) 952runops_trace (pTHX)
683{ 953{
684 COP *oldcop = 0; 954 COP *oldcop = 0;
685 int oldcxix = -2; 955 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx; 957 coro_cctx *cctx = coro->cctx;
688 958
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 960 {
691 PERL_ASYNC_CHECK (); 961 PERL_ASYNC_CHECK ();
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 978 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 979 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 980 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 981 : bot;
712 982
983 av_extend (av, top - bot);
713 while (bot < top) 984 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 985 av_push (av, SvREFCNT_inc_NN (*bot++));
715 986
716 PL_runops = RUNOPS_DEFAULT; 987 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 988 ENTER;
718 SAVETMPS; 989 SAVETMPS;
719 EXTEND (SP, 3); 990 EXTEND (SP, 3);
… …
757 SAVETMPS; 1028 SAVETMPS;
758 EXTEND (SP, 3); 1029 EXTEND (SP, 3);
759 PUSHMARK (SP); 1030 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1031 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1032 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1034 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
765 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1037 SPAGAIN;
767 FREETMPS; 1038 FREETMPS;
… …
799 1070
800 TAINT_NOT; 1071 TAINT_NOT;
801 return 0; 1072 return 0;
802} 1073}
803 1074
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1075static struct coro_cctx *cctx_ssl_cctx;
805/* _cctx_init should be careful, as it could be called at almost any time */ 1076static struct CoroSLF cctx_ssl_frame;
806/* during execution of a perl program */ 1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
807static void NOINLINE 1094static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx) 1095cctx_prepare (pTHX_ coro_cctx *cctx)
809{ 1096{
810 dSP;
811 LOGOP myop;
812
813 PL_top_env = &PL_start_env; 1097 PL_top_env = &PL_start_env;
814 1098
815 if (cctx->flags & CC_TRACE) 1099 if (cctx->flags & CC_TRACE)
816 PL_runops = runops_trace; 1100 PL_runops = runops_trace;
817 1101
818 Zero (&myop, 1, LOGOP); 1102 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1103 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1106
822 PUSHMARK (SP); 1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1108 cctx_ssl_cctx = cctx;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1109 cctx_ssl_frame = slf_frame;
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1110
826 PUTBACK; 1111 slf_frame.prepare = slf_prepare_set_stacklevel;
827 PL_op = (OP *)&myop; 1112 slf_frame.check = slf_check_set_stacklevel;
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1113}
829 SPAGAIN; 1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
830} 1120}
831 1121
832/* 1122/*
833 * this is a _very_ stripped down perl interpreter ;) 1123 * this is a _very_ stripped down perl interpreter ;)
834 */ 1124 */
835static void 1125static void
836coro_run (void *arg) 1126cctx_run (void *arg)
837{ 1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
1133 {
838 dTHX; 1134 dTHX;
839 1135
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1136 /* normally we would need to skip the entersub here */
841 UNLOCK; 1137 /* not doing so will re-execute it, which is exactly what we want */
842
843 /* we now skip the entersub that lead to transfer() */
844 PL_op = PL_op->op_next; 1138 /* PL_nop = PL_nop->op_next */
845 1139
846 /* inject a fake subroutine call to cctx_init */ 1140 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
848 1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1146 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1147 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1148 perl_run (PL_curinterp);
852 1149
853 /* 1150 /*
854 * If perl-run returns we assume exit() was being called or the coro 1151 * If perl-run returns we assume exit() was being called or the coro
855 * fell off the end, which seems to be the only valid (non-bug) 1152 * fell off the end, which seems to be the only valid (non-bug)
856 * reason for perl_run to return. We try to exit by jumping to the 1153 * reason for perl_run to return. We try to exit by jumping to the
857 * bootstrap-time "top" top_env, as we cannot restore the "main" 1154 * bootstrap-time "top" top_env, as we cannot restore the "main"
858 * coroutine as Coro has no such concept 1155 * coroutine as Coro has no such concept
859 */ 1156 */
860 PL_top_env = main_top_env; 1157 PL_top_env = main_top_env;
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1158 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1159 }
862} 1160}
863 1161
864static coro_cctx * 1162static coro_cctx *
865cctx_new () 1163cctx_new ()
866{ 1164{
867 coro_cctx *cctx; 1165 coro_cctx *cctx;
1166
1167 ++cctx_count;
1168 New (0, cctx, 1, coro_cctx);
1169
1170 cctx->gen = cctx_gen;
1171 cctx->flags = 0;
1172 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx only suitable as source */
1178static coro_cctx *
1179cctx_new_empty ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182
1183 cctx->sptr = 0;
1184 coro_create (&cctx->cctx, 0, 0, 0, 0);
1185
1186 return cctx;
1187}
1188
1189/* create a new cctx suitable as destination/running a perl interpreter */
1190static coro_cctx *
1191cctx_new_run ()
1192{
1193 coro_cctx *cctx = cctx_new ();
868 void *stack_start; 1194 void *stack_start;
869 size_t stack_size; 1195 size_t stack_size;
870 1196
871 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx);
874
875#if HAVE_MMAP 1197#if HAVE_MMAP
876
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1198 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
878 /* mmap supposedly does allocate-on-write for us */ 1199 /* mmap supposedly does allocate-on-write for us */
879 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1200 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1201
881 if (cctx->sptr != (void *)-1) 1202 if (cctx->sptr != (void *)-1)
882 { 1203 {
883# if CORO_STACKGUARD 1204 #if CORO_STACKGUARD
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1205 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
885# endif 1206 #endif
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1207 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1208 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED; 1209 cctx->flags |= CC_MAPPED;
889 } 1210 }
890 else 1211 else
891#endif 1212#endif
892 { 1213 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long); 1214 cctx->ssize = cctx_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long); 1215 New (0, cctx->sptr, cctx_stacksize, long);
895 1216
896 if (!cctx->sptr) 1217 if (!cctx->sptr)
897 { 1218 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1219 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1220 _exit (EXIT_FAILURE);
900 } 1221 }
901 1222
902 stack_start = cctx->sptr; 1223 stack_start = cctx->sptr;
903 stack_size = cctx->ssize; 1224 stack_size = cctx->ssize;
904 } 1225 }
905 1226
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1227 #if CORO_USE_VALGRIND
1228 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1229 #endif
1230
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1231 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
908 1232
909 return cctx; 1233 return cctx;
910} 1234}
911 1235
912static void 1236static void
… …
914{ 1238{
915 if (!cctx) 1239 if (!cctx)
916 return; 1240 return;
917 1241
918 --cctx_count; 1242 --cctx_count;
1243 coro_destroy (&cctx->cctx);
919 1244
1245 /* coro_transfer creates new, empty cctx's */
1246 if (cctx->sptr)
1247 {
920#if CORO_USE_VALGRIND 1248 #if CORO_USE_VALGRIND
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1249 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif 1250 #endif
923 1251
924#if HAVE_MMAP 1252#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED) 1253 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize); 1254 munmap (cctx->sptr, cctx->ssize);
927 else 1255 else
928#endif 1256#endif
929 Safefree (cctx->sptr); 1257 Safefree (cctx->sptr);
1258 }
930 1259
931 Safefree (cctx); 1260 Safefree (cctx);
932} 1261}
1262
1263/* wether this cctx should be destructed */
1264#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1265
934static coro_cctx * 1266static coro_cctx *
935cctx_get (pTHX) 1267cctx_get (pTHX)
936{ 1268{
937 while (cctx_first) 1269 while (expect_true (cctx_first))
938 { 1270 {
939 coro_cctx *cctx = cctx_first; 1271 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1272 cctx_first = cctx->next;
941 --cctx_idle; 1273 --cctx_idle;
942 1274
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1275 if (expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1276 return cctx;
945 1277
946 cctx_destroy (cctx); 1278 cctx_destroy (cctx);
947 } 1279 }
948 1280
949 return cctx_new (); 1281 return cctx_new_run ();
950} 1282}
951 1283
952static void 1284static void
953cctx_put (coro_cctx *cctx) 1285cctx_put (coro_cctx *cctx)
954{ 1286{
1287 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1288
955 /* free another cctx if overlimit */ 1289 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1290 if (expect_false (cctx_idle >= cctx_max_idle))
957 { 1291 {
958 coro_cctx *first = cctx_first; 1292 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1293 cctx_first = first->next;
960 --cctx_idle; 1294 --cctx_idle;
961 1295
… …
967 cctx_first = cctx; 1301 cctx_first = cctx;
968} 1302}
969 1303
970/** coroutine switching *****************************************************/ 1304/** coroutine switching *****************************************************/
971 1305
972static void NOINLINE 1306static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1307transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1308{
975 if (prev != next) 1309 /* TODO: throwing up here is considered harmful */
1310
1311 if (expect_true (prev != next))
976 { 1312 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1313 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
978 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1314 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
979 1315
980 if (next->flags & CF_RUNNING) 1316 if (expect_false (next->flags & CF_RUNNING))
981 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1317 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
982 1318
983 if (next->flags & CF_DESTROYED) 1319 if (expect_false (next->flags & CF_DESTROYED))
984 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1320 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
985 1321
1322#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1323 if (expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1324 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1325#endif
988 } 1326 }
989} 1327}
990 1328
991/* always use the TRANSFER macro */ 1329/* always use the TRANSFER macro */
992static void NOINLINE 1330static void NOINLINE /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1331transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1332{
995 dSTACKLEVEL; 1333 dSTACKLEVEL;
996 1334
997 /* sometimes transfer is only called to set idle_sp */ 1335 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1336 if (expect_false (!next))
999 { 1337 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1338 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1001 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1339 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 } 1340 }
1003 else if (prev != next) 1341 else if (expect_true (prev != next))
1004 { 1342 {
1005 coro_cctx *prev__cctx; 1343 coro_cctx *prev__cctx;
1006 1344
1007 if (prev->flags & CF_NEW) 1345 if (expect_false (prev->flags & CF_NEW))
1008 { 1346 {
1009 /* create a new empty context */ 1347 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx); 1348 prev->cctx = cctx_new_empty ();
1011 prev->flags &= ~CF_NEW; 1349 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1350 prev->flags |= CF_RUNNING;
1013 } 1351 }
1014 1352
1015 prev->flags &= ~CF_RUNNING; 1353 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1354 next->flags |= CF_RUNNING;
1017 1355
1018 LOCK; 1356 /* first get rid of the old state */
1357 save_perl (aTHX_ prev);
1019 1358
1020 if (next->flags & CF_NEW) 1359 if (expect_false (next->flags & CF_NEW))
1021 { 1360 {
1022 /* need to start coroutine */ 1361 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1362 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1363 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1364 coro_setup (aTHX_ next);
1028 } 1365 }
1029 else 1366 else
1367 load_perl (aTHX_ next);
1368
1369 prev__cctx = prev->cctx;
1370
1371 /* possibly untie and reuse the cctx */
1372 if (expect_true (
1373 prev__cctx->idle_sp == STACKLEVEL
1374 && !(prev__cctx->flags & CC_TRACE)
1375 && !force_cctx
1376 ))
1030 { 1377 {
1031 /* coroutine already started */
1032 save_perl (aTHX_ prev);
1033 load_perl (aTHX_ next);
1034 }
1035
1036 prev__cctx = prev->cctx;
1037
1038 /* possibly "free" the cctx */
1039 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1040 {
1041 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1378 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1042 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1379 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1043 1380
1044 prev->cctx = 0; 1381 prev->cctx = 0;
1382
1383 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1384 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1385 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1386 if (!next->cctx)
1387 next->cctx = cctx_get (aTHX);
1045 1388
1046 cctx_put (prev__cctx); 1389 cctx_put (prev__cctx);
1047 } 1390 }
1048 1391
1049 ++next->usecount; 1392 ++next->usecount;
1050 1393
1051 if (!next->cctx) 1394 if (expect_true (!next->cctx))
1052 next->cctx = cctx_get (aTHX); 1395 next->cctx = cctx_get (aTHX);
1053 1396
1054 if (prev__cctx != next->cctx) 1397 if (expect_false (prev__cctx != next->cctx))
1055 { 1398 {
1056 prev__cctx->top_env = PL_top_env; 1399 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env; 1400 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1401 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 } 1402 }
1060 1403
1061 free_coro_mortal (aTHX); 1404 transfer_tail (aTHX);
1062 UNLOCK;
1063 } 1405 }
1064} 1406}
1065 1407
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1408#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1072#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1409#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1410
1074/** high level stuff ********************************************************/ 1411/** high level stuff ********************************************************/
1075 1412
1076static int 1413static int
1077coro_state_destroy (pTHX_ struct coro *coro) 1414coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1415{
1079 if (coro->flags & CF_DESTROYED) 1416 if (coro->flags & CF_DESTROYED)
1080 return 0; 1417 return 0;
1418
1419 if (coro->on_destroy)
1420 coro->on_destroy (aTHX_ coro);
1081 1421
1082 coro->flags |= CF_DESTROYED; 1422 coro->flags |= CF_DESTROYED;
1083 1423
1084 if (coro->flags & CF_READY) 1424 if (coro->flags & CF_READY)
1085 { 1425 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1426 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1427 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1428 --coro_nready;
1090 UNLOCK;
1091 } 1429 }
1092 else 1430 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094 1432
1095 if (coro->mainstack && coro->mainstack != main_mainstack) 1433 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 { 1434 {
1097 struct coro temp; 1435 struct coro temp;
1098 1436
1099 if (coro->flags & CF_RUNNING) 1437 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101 1438
1102 save_perl (aTHX_ &temp); 1439 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro); 1440 load_perl (aTHX_ coro);
1104 1441
1105 coro_destroy (aTHX_ coro); 1442 coro_destruct (aTHX_ coro);
1106 1443
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1444 load_perl (aTHX_ &temp);
1108 1445
1109 coro->mainstack = 0; 1446 coro->slot = 0;
1110 } 1447 }
1111 1448
1112 cctx_destroy (coro->cctx); 1449 cctx_destroy (coro->cctx);
1450 SvREFCNT_dec (coro->startcv);
1113 SvREFCNT_dec (coro->args); 1451 SvREFCNT_dec (coro->args);
1114 1452
1115 if (coro->next) coro->next->prev = coro->prev; 1453 if (coro->next) coro->next->prev = coro->prev;
1116 if (coro->prev) coro->prev->next = coro->next; 1454 if (coro->prev) coro->prev->next = coro->next;
1117 if (coro == coro_first) coro_first = coro->next; 1455 if (coro == coro_first) coro_first = coro->next;
… …
1156# define MGf_DUP 0 1494# define MGf_DUP 0
1157#endif 1495#endif
1158}; 1496};
1159 1497
1160static void 1498static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1499prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1500{
1163 ta->prev = SvSTATE (prev_sv); 1501 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1502 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1503 TRANSFER_CHECK (*ta);
1166} 1504}
1167 1505
1168static void 1506static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1507api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1170{ 1508{
1171 dTHX;
1172 struct transfer_args ta; 1509 struct coro_transfer_args ta;
1173 1510
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1511 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1175 TRANSFER (ta); 1512 TRANSFER (ta, 1);
1513}
1514
1515/*****************************************************************************/
1516/* gensub: simple closure generation utility */
1517
1518#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1519
1520/* create a closure from XS, returns a code reference */
1521/* the arg can be accessed via GENSUB_ARG from the callback */
1522/* the callback must use dXSARGS/XSRETURN */
1523static SV *
1524gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1525{
1526 CV *cv = (CV *)newSV (0);
1527
1528 sv_upgrade ((SV *)cv, SVt_PVCV);
1529
1530 CvANON_on (cv);
1531 CvISXSUB_on (cv);
1532 CvXSUB (cv) = xsub;
1533 GENSUB_ARG = arg;
1534
1535 return newRV_noinc ((SV *)cv);
1176} 1536}
1177 1537
1178/** Coro ********************************************************************/ 1538/** Coro ********************************************************************/
1179 1539
1180static void 1540INLINE void
1181coro_enq (pTHX_ SV *coro_sv) 1541coro_enq (pTHX_ struct coro *coro)
1182{ 1542{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1543 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1184} 1544}
1185 1545
1186static SV * 1546INLINE SV *
1187coro_deq (pTHX_ int min_prio) 1547coro_deq (pTHX)
1188{ 1548{
1189 int prio = PRIO_MAX - PRIO_MIN; 1549 int prio;
1190 1550
1191 min_prio -= PRIO_MIN;
1192 if (min_prio < 0)
1193 min_prio = 0;
1194
1195 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1551 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1196 if (AvFILLp (coro_ready [prio]) >= 0) 1552 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]); 1553 return av_shift (coro_ready [prio]);
1198 1554
1199 return 0; 1555 return 0;
1200} 1556}
1201 1557
1202static int 1558static int
1203api_ready (SV *coro_sv) 1559api_ready (pTHX_ SV *coro_sv)
1204{ 1560{
1205 dTHX;
1206 struct coro *coro; 1561 struct coro *coro;
1562 SV *sv_hook;
1563 void (*xs_hook)(void);
1207 1564
1208 if (SvROK (coro_sv)) 1565 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv); 1566 coro_sv = SvRV (coro_sv);
1210 1567
1211 coro = SvSTATE (coro_sv); 1568 coro = SvSTATE (coro_sv);
… …
1213 if (coro->flags & CF_READY) 1570 if (coro->flags & CF_READY)
1214 return 0; 1571 return 0;
1215 1572
1216 coro->flags |= CF_READY; 1573 coro->flags |= CF_READY;
1217 1574
1218 LOCK; 1575 sv_hook = coro_nready ? 0 : coro_readyhook;
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1576 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1577
1578 coro_enq (aTHX_ coro);
1220 ++coro_nready; 1579 ++coro_nready;
1221 UNLOCK; 1580
1581 if (sv_hook)
1582 {
1583 dSP;
1584
1585 ENTER;
1586 SAVETMPS;
1587
1588 PUSHMARK (SP);
1589 PUTBACK;
1590 call_sv (sv_hook, G_VOID | G_DISCARD);
1591
1592 FREETMPS;
1593 LEAVE;
1594 }
1595
1596 if (xs_hook)
1597 xs_hook ();
1222 1598
1223 return 1; 1599 return 1;
1224} 1600}
1225 1601
1226static int 1602static int
1227api_is_ready (SV *coro_sv) 1603api_is_ready (pTHX_ SV *coro_sv)
1228{ 1604{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1605 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1606}
1232 1607
1233static void 1608INLINE void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1609prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1235{ 1610{
1236 SV *prev_sv, *next_sv; 1611 SV *prev_sv, *next_sv;
1237 1612
1238 for (;;) 1613 for (;;)
1239 { 1614 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN); 1615 next_sv = coro_deq (aTHX);
1242 1616
1243 /* nothing to schedule: call the idle handler */ 1617 /* nothing to schedule: call the idle handler */
1244 if (!next_sv) 1618 if (expect_false (!next_sv))
1245 { 1619 {
1246 dSP; 1620 dSP;
1247 UNLOCK;
1248 1621
1249 ENTER; 1622 ENTER;
1250 SAVETMPS; 1623 SAVETMPS;
1251 1624
1252 PUSHMARK (SP); 1625 PUSHMARK (SP);
1253 PUTBACK; 1626 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1627 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1255 1628
1256 FREETMPS; 1629 FREETMPS;
1257 LEAVE; 1630 LEAVE;
1258 continue; 1631 continue;
1259 } 1632 }
1260 1633
1261 ta->next = SvSTATE (next_sv); 1634 ta->next = SvSTATE_hv (next_sv);
1262 1635
1263 /* cannot transfer to destroyed coros, skip and look for next */ 1636 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED) 1637 if (expect_false (ta->next->flags & CF_DESTROYED))
1265 { 1638 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv); 1639 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */ 1640 /* coro_nready has already been taken care of by destroy */
1269 continue; 1641 continue;
1270 } 1642 }
1271 1643
1272 --coro_nready; 1644 --coro_nready;
1273 UNLOCK;
1274 break; 1645 break;
1275 } 1646 }
1276 1647
1277 /* free this only after the transfer */ 1648 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1649 prev_sv = SvRV (coro_current);
1279 ta->prev = SvSTATE (prev_sv); 1650 ta->prev = SvSTATE_hv (prev_sv);
1280 TRANSFER_CHECK (*ta); 1651 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1652 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1282 ta->next->flags &= ~CF_READY; 1653 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1654 SvRV_set (coro_current, next_sv);
1284 1655
1285 LOCK;
1286 free_coro_mortal (aTHX); 1656 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1657 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1658}
1290 1659
1291static void 1660INLINE void
1292prepare_cede (pTHX_ struct transfer_args *ta) 1661prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 1662{
1294 api_ready (coro_current); 1663 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 1664 prepare_schedule (aTHX_ ta);
1296} 1665}
1297 1666
1667INLINE void
1668prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1669{
1670 SV *prev = SvRV (coro_current);
1671
1672 if (coro_nready)
1673 {
1674 prepare_schedule (aTHX_ ta);
1675 api_ready (aTHX_ prev);
1676 }
1677 else
1678 prepare_nop (aTHX_ ta);
1679}
1680
1681static void
1682api_schedule (pTHX)
1683{
1684 struct coro_transfer_args ta;
1685
1686 prepare_schedule (aTHX_ &ta);
1687 TRANSFER (ta, 1);
1688}
1689
1298static int 1690static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 1691api_cede (pTHX)
1300{ 1692{
1301 if (coro_nready) 1693 struct coro_transfer_args ta;
1302 { 1694
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 1695 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 1696
1697 if (expect_true (ta.prev != ta.next))
1698 {
1699 TRANSFER (ta, 1);
1306 return 1; 1700 return 1;
1307 } 1701 }
1308 else 1702 else
1309 return 0; 1703 return 0;
1310} 1704}
1311 1705
1312static void
1313api_schedule (void)
1314{
1315 dTHX;
1316 struct transfer_args ta;
1317
1318 prepare_schedule (aTHX_ &ta);
1319 TRANSFER (ta);
1320}
1321
1322static int 1706static int
1323api_cede (void) 1707api_cede_notself (pTHX)
1324{ 1708{
1325 dTHX; 1709 if (coro_nready)
1710 {
1326 struct transfer_args ta; 1711 struct coro_transfer_args ta;
1327 1712
1328 prepare_cede (aTHX_ &ta); 1713 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 1714 TRANSFER (ta, 1);
1333 return 1; 1715 return 1;
1334 } 1716 }
1335 else 1717 else
1336 return 0; 1718 return 0;
1337} 1719}
1338 1720
1339static int 1721static void
1340api_cede_notself (void)
1341{
1342 dTHX;
1343 struct transfer_args ta;
1344
1345 if (prepare_cede_notself (aTHX_ &ta))
1346 {
1347 TRANSFER (ta);
1348 return 1;
1349 }
1350 else
1351 return 0;
1352}
1353
1354static void
1355api_trace (SV *coro_sv, int flags) 1722api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 1723{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 1724 struct coro *coro = SvSTATE (coro_sv);
1359 1725
1360 if (flags & CC_TRACE) 1726 if (flags & CC_TRACE)
1361 { 1727 {
1362 if (!coro->cctx) 1728 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 1729 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 1730 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 1731 croak ("cannot enable tracing on coroutine with custom stack,");
1366 1732
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 1734 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 1736 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 1738
1373 if (coro->flags & CF_RUNNING) 1739 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 1740 PL_runops = RUNOPS_DEFAULT;
1375 else 1741 else
1376 coro->runops = RUNOPS_DEFAULT; 1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746/*****************************************************************************/
1747/* rouse callback */
1748
1749#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1750
1751static void
1752coro_rouse_callback (pTHX_ CV *cv)
1753{
1754 dXSARGS;
1755 SV *data = (SV *)GENSUB_ARG;
1756
1757 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1377 } 1758 {
1759 /* first call, set args */
1760 int i;
1761 AV *av = newAV ();
1762 SV *coro = SvRV (data);
1763
1764 SvRV_set (data, (SV *)av);
1765 api_ready (aTHX_ coro);
1766 SvREFCNT_dec (coro);
1767
1768 /* better take a full copy of the arguments */
1769 while (items--)
1770 av_store (av, items, newSVsv (ST (items)));
1771 }
1772
1773 XSRETURN_EMPTY;
1378} 1774}
1775
1776static int
1777slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1778{
1779 SV *data = (SV *)frame->data;
1780
1781 if (CORO_THROW)
1782 return 0;
1783
1784 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1785 return 1;
1786
1787 /* now push all results on the stack */
1788 {
1789 dSP;
1790 AV *av = (AV *)SvRV (data);
1791 int i;
1792
1793 EXTEND (SP, AvFILLp (av) + 1);
1794 for (i = 0; i <= AvFILLp (av); ++i)
1795 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1796
1797 /* we have stolen the elements, so ste length to zero and free */
1798 AvFILLp (av) = -1;
1799 av_undef (av);
1800
1801 PUTBACK;
1802 }
1803
1804 return 0;
1805}
1806
1807static void
1808slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1809{
1810 SV *cb;
1811
1812 if (items)
1813 cb = arg [0];
1814 else
1815 {
1816 struct coro *coro = SvSTATE_current;
1817
1818 if (!coro->rouse_cb)
1819 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1820
1821 cb = sv_2mortal (coro->rouse_cb);
1822 coro->rouse_cb = 0;
1823 }
1824
1825 if (!SvROK (cb)
1826 || SvTYPE (SvRV (cb)) != SVt_PVCV
1827 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1828 croak ("Coro::rouse_wait called with illegal callback argument,");
1829
1830 {
1831 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1832 SV *data = (SV *)GENSUB_ARG;
1833
1834 frame->data = (void *)data;
1835 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1836 frame->check = slf_check_rouse_wait;
1837 }
1838}
1839
1840static SV *
1841coro_new_rouse_cb (pTHX)
1842{
1843 HV *hv = (HV *)SvRV (coro_current);
1844 struct coro *coro = SvSTATE_hv (hv);
1845 SV *data = newRV_inc ((SV *)hv);
1846 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1847
1848 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1849 SvREFCNT_dec (data); /* magicext increases the refcount */
1850
1851 SvREFCNT_dec (coro->rouse_cb);
1852 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1853
1854 return cb;
1855}
1856
1857/*****************************************************************************/
1858/* schedule-like-function opcode (SLF) */
1859
1860static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1861static const CV *slf_cv;
1862static SV **slf_argv;
1863static int slf_argc, slf_arga; /* count, allocated */
1864static I32 slf_ax; /* top of stack, for restore */
1865
1866/* this restores the stack in the case we patched the entersub, to */
1867/* recreate the stack frame as perl will on following calls */
1868/* since entersub cleared the stack */
1869static OP *
1870pp_restore (pTHX)
1871{
1872 int i;
1873 SV **SP = PL_stack_base + slf_ax;
1874
1875 PUSHMARK (SP);
1876
1877 EXTEND (SP, slf_argc + 1);
1878
1879 for (i = 0; i < slf_argc; ++i)
1880 PUSHs (sv_2mortal (slf_argv [i]));
1881
1882 PUSHs ((SV *)CvGV (slf_cv));
1883
1884 RETURNOP (slf_restore.op_first);
1885}
1886
1887static void
1888slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1889{
1890 SV **arg = (SV **)slf_frame.data;
1891
1892 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1893}
1894
1895static void
1896slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 if (items != 2)
1899 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1900
1901 frame->prepare = slf_prepare_transfer;
1902 frame->check = slf_check_nop;
1903 frame->data = (void *)arg; /* let's hope it will stay valid */
1904}
1905
1906static void
1907slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1908{
1909 frame->prepare = prepare_schedule;
1910 frame->check = slf_check_nop;
1911}
1912
1913static void
1914slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 frame->prepare = prepare_cede;
1917 frame->check = slf_check_nop;
1918}
1919
1920static void
1921slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1922{
1923 frame->prepare = prepare_cede_notself;
1924 frame->check = slf_check_nop;
1925}
1926
1927/*
1928 * these not obviously related functions are all rolled into one
1929 * function to increase chances that they all will call transfer with the same
1930 * stack offset
1931 * SLF stands for "schedule-like-function".
1932 */
1933static OP *
1934pp_slf (pTHX)
1935{
1936 I32 checkmark; /* mark SP to see how many elements check has pushed */
1937
1938 /* set up the slf frame, unless it has already been set-up */
1939 /* the latter happens when a new coro has been started */
1940 /* or when a new cctx was attached to an existing coroutine */
1941 if (expect_true (!slf_frame.prepare))
1942 {
1943 /* first iteration */
1944 dSP;
1945 SV **arg = PL_stack_base + TOPMARK + 1;
1946 int items = SP - arg; /* args without function object */
1947 SV *gv = *sp;
1948
1949 /* do a quick consistency check on the "function" object, and if it isn't */
1950 /* for us, divert to the real entersub */
1951 if (SvTYPE (gv) != SVt_PVGV
1952 || !GvCV (gv)
1953 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1954 return PL_ppaddr[OP_ENTERSUB](aTHX);
1955
1956 if (!(PL_op->op_flags & OPf_STACKED))
1957 {
1958 /* ampersand-form of call, use @_ instead of stack */
1959 AV *av = GvAV (PL_defgv);
1960 arg = AvARRAY (av);
1961 items = AvFILLp (av) + 1;
1962 }
1963
1964 /* now call the init function, which needs to set up slf_frame */
1965 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1966 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1967
1968 /* pop args */
1969 SP = PL_stack_base + POPMARK;
1970
1971 PUTBACK;
1972 }
1973
1974 /* now that we have a slf_frame, interpret it! */
1975 /* we use a callback system not to make the code needlessly */
1976 /* complicated, but so we can run multiple perl coros from one cctx */
1977
1978 do
1979 {
1980 struct coro_transfer_args ta;
1981
1982 slf_frame.prepare (aTHX_ &ta);
1983 TRANSFER (ta, 0);
1984
1985 checkmark = PL_stack_sp - PL_stack_base;
1986 }
1987 while (slf_frame.check (aTHX_ &slf_frame));
1988
1989 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1990
1991 /* exception handling */
1992 if (expect_false (CORO_THROW))
1993 {
1994 SV *exception = sv_2mortal (CORO_THROW);
1995
1996 CORO_THROW = 0;
1997 sv_setsv (ERRSV, exception);
1998 croak (0);
1999 }
2000
2001 /* return value handling - mostly like entersub */
2002 /* make sure we put something on the stack in scalar context */
2003 if (GIMME_V == G_SCALAR)
2004 {
2005 dSP;
2006 SV **bot = PL_stack_base + checkmark;
2007
2008 if (sp == bot) /* too few, push undef */
2009 bot [1] = &PL_sv_undef;
2010 else if (sp != bot + 1) /* too many, take last one */
2011 bot [1] = *sp;
2012
2013 SP = bot + 1;
2014
2015 PUTBACK;
2016 }
2017
2018 return NORMAL;
2019}
2020
2021static void
2022api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2023{
2024 int i;
2025 SV **arg = PL_stack_base + ax;
2026 int items = PL_stack_sp - arg + 1;
2027
2028 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2029
2030 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2031 && PL_op->op_ppaddr != pp_slf)
2032 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2033
2034 CvFLAGS (cv) |= CVf_SLF;
2035 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2036 slf_cv = cv;
2037
2038 /* we patch the op, and then re-run the whole call */
2039 /* we have to put the same argument on the stack for this to work */
2040 /* and this will be done by pp_restore */
2041 slf_restore.op_next = (OP *)&slf_restore;
2042 slf_restore.op_type = OP_CUSTOM;
2043 slf_restore.op_ppaddr = pp_restore;
2044 slf_restore.op_first = PL_op;
2045
2046 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2047
2048 if (PL_op->op_flags & OPf_STACKED)
2049 {
2050 if (items > slf_arga)
2051 {
2052 slf_arga = items;
2053 free (slf_argv);
2054 slf_argv = malloc (slf_arga * sizeof (SV *));
2055 }
2056
2057 slf_argc = items;
2058
2059 for (i = 0; i < items; ++i)
2060 slf_argv [i] = SvREFCNT_inc (arg [i]);
2061 }
2062 else
2063 slf_argc = 0;
2064
2065 PL_op->op_ppaddr = pp_slf;
2066 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2067
2068 PL_op = (OP *)&slf_restore;
2069}
2070
2071/*****************************************************************************/
2072/* PerlIO::cede */
2073
2074typedef struct
2075{
2076 PerlIOBuf base;
2077 NV next, every;
2078} PerlIOCede;
2079
2080static IV
2081PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2086 self->next = nvtime () + self->every;
2087
2088 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2089}
2090
2091static SV *
2092PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2093{
2094 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2095
2096 return newSVnv (self->every);
2097}
2098
2099static IV
2100PerlIOCede_flush (pTHX_ PerlIO *f)
2101{
2102 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2103 double now = nvtime ();
2104
2105 if (now >= self->next)
2106 {
2107 api_cede (aTHX);
2108 self->next = now + self->every;
2109 }
2110
2111 return PerlIOBuf_flush (aTHX_ f);
2112}
2113
2114static PerlIO_funcs PerlIO_cede =
2115{
2116 sizeof(PerlIO_funcs),
2117 "cede",
2118 sizeof(PerlIOCede),
2119 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2120 PerlIOCede_pushed,
2121 PerlIOBuf_popped,
2122 PerlIOBuf_open,
2123 PerlIOBase_binmode,
2124 PerlIOCede_getarg,
2125 PerlIOBase_fileno,
2126 PerlIOBuf_dup,
2127 PerlIOBuf_read,
2128 PerlIOBuf_unread,
2129 PerlIOBuf_write,
2130 PerlIOBuf_seek,
2131 PerlIOBuf_tell,
2132 PerlIOBuf_close,
2133 PerlIOCede_flush,
2134 PerlIOBuf_fill,
2135 PerlIOBase_eof,
2136 PerlIOBase_error,
2137 PerlIOBase_clearerr,
2138 PerlIOBase_setlinebuf,
2139 PerlIOBuf_get_base,
2140 PerlIOBuf_bufsiz,
2141 PerlIOBuf_get_ptr,
2142 PerlIOBuf_get_cnt,
2143 PerlIOBuf_set_ptrcnt,
2144};
2145
2146/*****************************************************************************/
2147/* Coro::Semaphore & Coro::Signal */
2148
2149static SV *
2150coro_waitarray_new (pTHX_ int count)
2151{
2152 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2153 AV *av = newAV ();
2154 SV **ary;
2155
2156 /* unfortunately, building manually saves memory */
2157 Newx (ary, 2, SV *);
2158 AvALLOC (av) = ary;
2159 /*AvARRAY (av) = ary;*/
2160 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2161 AvMAX (av) = 1;
2162 AvFILLp (av) = 0;
2163 ary [0] = newSViv (count);
2164
2165 return newRV_noinc ((SV *)av);
2166}
2167
2168/* semaphore */
2169
2170static void
2171coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2172{
2173 SV *count_sv = AvARRAY (av)[0];
2174 IV count = SvIVX (count_sv);
2175
2176 count += adjust;
2177 SvIVX (count_sv) = count;
2178
2179 /* now wake up as many waiters as are expected to lock */
2180 while (count > 0 && AvFILLp (av) > 0)
2181 {
2182 SV *cb;
2183
2184 /* swap first two elements so we can shift a waiter */
2185 AvARRAY (av)[0] = AvARRAY (av)[1];
2186 AvARRAY (av)[1] = count_sv;
2187 cb = av_shift (av);
2188
2189 if (SvOBJECT (cb))
2190 {
2191 api_ready (aTHX_ cb);
2192 --count;
2193 }
2194 else if (SvTYPE (cb) == SVt_PVCV)
2195 {
2196 dSP;
2197 PUSHMARK (SP);
2198 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2199 PUTBACK;
2200 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2201 }
2202
2203 SvREFCNT_dec (cb);
2204 }
2205}
2206
2207static void
2208coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2209{
2210 /* call $sem->adjust (0) to possibly wake up some other waiters */
2211 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2212}
2213
2214static int
2215slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2216{
2217 AV *av = (AV *)frame->data;
2218 SV *count_sv = AvARRAY (av)[0];
2219
2220 /* if we are about to throw, don't actually acquire the lock, just throw */
2221 if (CORO_THROW)
2222 return 0;
2223 else if (SvIVX (count_sv) > 0)
2224 {
2225 SvSTATE_current->on_destroy = 0;
2226
2227 if (acquire)
2228 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2229 else
2230 coro_semaphore_adjust (aTHX_ av, 0);
2231
2232 return 0;
2233 }
2234 else
2235 {
2236 int i;
2237 /* if we were woken up but can't down, we look through the whole */
2238 /* waiters list and only add us if we aren't in there already */
2239 /* this avoids some degenerate memory usage cases */
2240
2241 for (i = 1; i <= AvFILLp (av); ++i)
2242 if (AvARRAY (av)[i] == SvRV (coro_current))
2243 return 1;
2244
2245 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2246 return 1;
2247 }
2248}
2249
2250static int
2251slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2252{
2253 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2254}
2255
2256static int
2257slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2258{
2259 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2260}
2261
2262static void
2263slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2264{
2265 AV *av = (AV *)SvRV (arg [0]);
2266
2267 if (SvIVX (AvARRAY (av)[0]) > 0)
2268 {
2269 frame->data = (void *)av;
2270 frame->prepare = prepare_nop;
2271 }
2272 else
2273 {
2274 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2275
2276 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2277 frame->prepare = prepare_schedule;
2278
2279 /* to avoid race conditions when a woken-up coro gets terminated */
2280 /* we arrange for a temporary on_destroy that calls adjust (0) */
2281 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2282 }
2283}
2284
2285static void
2286slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2287{
2288 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2289 frame->check = slf_check_semaphore_down;
2290}
2291
2292static void
2293slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2294{
2295 if (items >= 2)
2296 {
2297 /* callback form */
2298 AV *av = (AV *)SvRV (arg [0]);
2299 CV *cb_cv = coro_sv_2cv (arg [1]);
2300
2301 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2302
2303 if (SvIVX (AvARRAY (av)[0]) > 0)
2304 coro_semaphore_adjust (aTHX_ av, 0);
2305
2306 frame->prepare = prepare_nop;
2307 frame->check = slf_check_nop;
2308 }
2309 else
2310 {
2311 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2312 frame->check = slf_check_semaphore_wait;
2313 }
2314}
2315
2316/* signal */
2317
2318static void
2319coro_signal_wake (pTHX_ AV *av, int count)
2320{
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322
2323 /* now signal count waiters */
2324 while (count > 0 && AvFILLp (av) > 0)
2325 {
2326 SV *cb;
2327
2328 /* swap first two elements so we can shift a waiter */
2329 cb = AvARRAY (av)[0];
2330 AvARRAY (av)[0] = AvARRAY (av)[1];
2331 AvARRAY (av)[1] = cb;
2332
2333 cb = av_shift (av);
2334
2335 api_ready (aTHX_ cb);
2336 sv_setiv (cb, 0); /* signal waiter */
2337 SvREFCNT_dec (cb);
2338
2339 --count;
2340 }
2341}
2342
2343static int
2344slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2345{
2346 /* if we are about to throw, also stop waiting */
2347 return SvROK ((SV *)frame->data) && !CORO_THROW;
2348}
2349
2350static void
2351slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2352{
2353 AV *av = (AV *)SvRV (arg [0]);
2354
2355 if (SvIVX (AvARRAY (av)[0]))
2356 {
2357 SvIVX (AvARRAY (av)[0]) = 0;
2358 frame->prepare = prepare_nop;
2359 frame->check = slf_check_nop;
2360 }
2361 else
2362 {
2363 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2364
2365 av_push (av, waiter);
2366
2367 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2368 frame->prepare = prepare_schedule;
2369 frame->check = slf_check_signal_wait;
2370 }
2371}
2372
2373/*****************************************************************************/
2374/* Coro::AIO */
2375
2376#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2377
2378/* helper storage struct */
2379struct io_state
2380{
2381 int errorno;
2382 I32 laststype; /* U16 in 5.10.0 */
2383 int laststatval;
2384 Stat_t statcache;
2385};
2386
2387static void
2388coro_aio_callback (pTHX_ CV *cv)
2389{
2390 dXSARGS;
2391 AV *state = (AV *)GENSUB_ARG;
2392 SV *coro = av_pop (state);
2393 SV *data_sv = newSV (sizeof (struct io_state));
2394
2395 av_extend (state, items);
2396
2397 sv_upgrade (data_sv, SVt_PV);
2398 SvCUR_set (data_sv, sizeof (struct io_state));
2399 SvPOK_only (data_sv);
2400
2401 {
2402 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2403
2404 data->errorno = errno;
2405 data->laststype = PL_laststype;
2406 data->laststatval = PL_laststatval;
2407 data->statcache = PL_statcache;
2408 }
2409
2410 /* now build the result vector out of all the parameters and the data_sv */
2411 {
2412 int i;
2413
2414 for (i = 0; i < items; ++i)
2415 av_push (state, SvREFCNT_inc_NN (ST (i)));
2416 }
2417
2418 av_push (state, data_sv);
2419
2420 api_ready (aTHX_ coro);
2421 SvREFCNT_dec (coro);
2422 SvREFCNT_dec ((AV *)state);
2423}
2424
2425static int
2426slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2427{
2428 AV *state = (AV *)frame->data;
2429
2430 /* if we are about to throw, return early */
2431 /* this does not cancel the aio request, but at least */
2432 /* it quickly returns */
2433 if (CORO_THROW)
2434 return 0;
2435
2436 /* one element that is an RV? repeat! */
2437 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2438 return 1;
2439
2440 /* restore status */
2441 {
2442 SV *data_sv = av_pop (state);
2443 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2444
2445 errno = data->errorno;
2446 PL_laststype = data->laststype;
2447 PL_laststatval = data->laststatval;
2448 PL_statcache = data->statcache;
2449
2450 SvREFCNT_dec (data_sv);
2451 }
2452
2453 /* push result values */
2454 {
2455 dSP;
2456 int i;
2457
2458 EXTEND (SP, AvFILLp (state) + 1);
2459 for (i = 0; i <= AvFILLp (state); ++i)
2460 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2461
2462 PUTBACK;
2463 }
2464
2465 return 0;
2466}
2467
2468static void
2469slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2470{
2471 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2472 SV *coro_hv = SvRV (coro_current);
2473 struct coro *coro = SvSTATE_hv (coro_hv);
2474
2475 /* put our coroutine id on the state arg */
2476 av_push (state, SvREFCNT_inc_NN (coro_hv));
2477
2478 /* first see whether we have a non-zero priority and set it as AIO prio */
2479 if (coro->prio)
2480 {
2481 dSP;
2482
2483 static SV *prio_cv;
2484 static SV *prio_sv;
2485
2486 if (expect_false (!prio_cv))
2487 {
2488 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2489 prio_sv = newSViv (0);
2490 }
2491
2492 PUSHMARK (SP);
2493 sv_setiv (prio_sv, coro->prio);
2494 XPUSHs (prio_sv);
2495
2496 PUTBACK;
2497 call_sv (prio_cv, G_VOID | G_DISCARD);
2498 }
2499
2500 /* now call the original request */
2501 {
2502 dSP;
2503 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2504 int i;
2505
2506 PUSHMARK (SP);
2507
2508 /* first push all args to the stack */
2509 EXTEND (SP, items + 1);
2510
2511 for (i = 0; i < items; ++i)
2512 PUSHs (arg [i]);
2513
2514 /* now push the callback closure */
2515 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2516
2517 /* now call the AIO function - we assume our request is uncancelable */
2518 PUTBACK;
2519 call_sv ((SV *)req, G_VOID | G_DISCARD);
2520 }
2521
2522 /* now that the requets is going, we loop toll we have a result */
2523 frame->data = (void *)state;
2524 frame->prepare = prepare_schedule;
2525 frame->check = slf_check_aio_req;
2526}
2527
2528static void
2529coro_aio_req_xs (pTHX_ CV *cv)
2530{
2531 dXSARGS;
2532
2533 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2534
2535 XSRETURN_EMPTY;
2536}
2537
2538/*****************************************************************************/
1379 2539
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2540MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 2541
1382PROTOTYPES: DISABLE 2542PROTOTYPES: DISABLE
1383 2543
1384BOOT: 2544BOOT:
1385{ 2545{
1386#ifdef USE_ITHREADS 2546#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 2547# if CORO_PTHREAD
2548 coro_thx = PERL_GET_CONTEXT;
2549# endif
1388#endif 2550#endif
1389 BOOT_PAGESIZE; 2551 BOOT_PAGESIZE;
1390 2552
1391 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1392 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2555
2556 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2557 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2558 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2559
2560 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2561 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2562 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 2563
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2564 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 2565
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2566 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2567 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1402 main_top_env = PL_top_env; 2572 main_top_env = PL_top_env;
1403 2573
1404 while (main_top_env->je_prev) 2574 while (main_top_env->je_prev)
1405 main_top_env = main_top_env->je_prev; 2575 main_top_env = main_top_env->je_prev;
1406 2576
2577 {
2578 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2579
2580 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2581 hv_store_ent (PL_custom_op_names, slf,
2582 newSVpv ("coro_slf", 0), 0);
2583
2584 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2585 hv_store_ent (PL_custom_op_descs, slf,
2586 newSVpv ("coro schedule like function", 0), 0);
2587 }
2588
1407 coroapi.ver = CORO_API_VERSION; 2589 coroapi.ver = CORO_API_VERSION;
2590 coroapi.rev = CORO_API_REVISION;
2591
1408 coroapi.transfer = api_transfer; 2592 coroapi.transfer = api_transfer;
2593
2594 coroapi.sv_state = SvSTATE_;
2595 coroapi.execute_slf = api_execute_slf;
2596 coroapi.prepare_nop = prepare_nop;
2597 coroapi.prepare_schedule = prepare_schedule;
2598 coroapi.prepare_cede = prepare_cede;
2599 coroapi.prepare_cede_notself = prepare_cede_notself;
2600
2601 {
2602 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2603
2604 if (!svp) croak ("Time::HiRes is required");
2605 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2606
2607 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2608 }
1409 2609
1410 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2610 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1411} 2611}
1412 2612
1413SV * 2613SV *
1414new (char *klass, ...) 2614new (char *klass, ...)
1415 CODE: 2615 CODE:
1416{ 2616{
1417 struct coro *coro; 2617 struct coro *coro;
2618 MAGIC *mg;
1418 HV *hv; 2619 HV *hv;
2620 CV *cb;
1419 int i; 2621 int i;
2622
2623 if (items > 1)
2624 {
2625 cb = coro_sv_2cv (ST (1));
2626
2627 if (CvISXSUB (cb))
2628 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2629
2630 if (!CvROOT (cb))
2631 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2632 }
1420 2633
1421 Newz (0, coro, 1, struct coro); 2634 Newz (0, coro, 1, struct coro);
1422 coro->args = newAV (); 2635 coro->args = newAV ();
1423 coro->flags = CF_NEW; 2636 coro->flags = CF_NEW;
1424 2637
1425 if (coro_first) coro_first->prev = coro; 2638 if (coro_first) coro_first->prev = coro;
1426 coro->next = coro_first; 2639 coro->next = coro_first;
1427 coro_first = coro; 2640 coro_first = coro;
1428 2641
1429 coro->hv = hv = newHV (); 2642 coro->hv = hv = newHV ();
1430 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2643 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2644 mg->mg_flags |= MGf_DUP;
1431 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2645 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1432 2646
2647 if (items > 1)
2648 {
2649 coro->startcv = SvREFCNT_inc_NN (cb);
2650
1433 av_extend (coro->args, items - 1); 2651 av_extend (coro->args, items - 1);
1434 2652 av_push (coro->args, SvREFCNT_inc (cb));
1435 for (i = 1; i < items; i++) 2653 for (i = 2; i < items; i++)
1436 av_push (coro->args, newSVsv (ST (i))); 2654 av_push (coro->args, newSVsv (ST (i)));
2655 }
1437} 2656}
1438 OUTPUT: 2657 OUTPUT:
1439 RETVAL 2658 RETVAL
1440 2659
1441# these not obviously related functions are all rolled into the same xs
1442# function to increase chances that they all will call transfer with the same
1443# stack offset
1444void 2660void
1445_set_stacklevel (...) 2661transfer (...)
1446 ALIAS: 2662 PROTOTYPE: $$
1447 Coro::State::transfer = 1 2663 CODE:
1448 Coro::schedule = 2 2664 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1449 Coro::cede = 3
1450 Coro::cede_notself = 4
1451 CODE:
1452{
1453 struct transfer_args ta;
1454
1455 switch (ix)
1456 {
1457 case 0:
1458 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1459 ta.next = 0;
1460 break;
1461
1462 case 1:
1463 if (items != 2)
1464 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1465
1466 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1467 break;
1468
1469 case 2:
1470 prepare_schedule (aTHX_ &ta);
1471 break;
1472
1473 case 3:
1474 prepare_cede (aTHX_ &ta);
1475 break;
1476
1477 case 4:
1478 if (!prepare_cede_notself (aTHX_ &ta))
1479 XSRETURN_EMPTY;
1480
1481 break;
1482 }
1483
1484 BARRIER;
1485 TRANSFER (ta);
1486
1487 if (GIMME_V != G_VOID && ta.next != ta.prev)
1488 XSRETURN_YES;
1489}
1490 2665
1491bool 2666bool
1492_destroy (SV *coro_sv) 2667_destroy (SV *coro_sv)
1493 CODE: 2668 CODE:
1494 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1495 OUTPUT: 2670 OUTPUT:
1496 RETVAL 2671 RETVAL
1497 2672
1498void 2673void
1499_exit (code) 2674_exit (int code)
1500 int code
1501 PROTOTYPE: $ 2675 PROTOTYPE: $
1502 CODE: 2676 CODE:
1503 _exit (code); 2677 _exit (code);
1504 2678
1505int 2679int
1506cctx_stacksize (int new_stacksize = 0) 2680cctx_stacksize (int new_stacksize = 0)
2681 PROTOTYPE: ;$
1507 CODE: 2682 CODE:
1508 RETVAL = coro_stacksize; 2683 RETVAL = cctx_stacksize;
1509 if (new_stacksize) 2684 if (new_stacksize)
2685 {
1510 coro_stacksize = new_stacksize; 2686 cctx_stacksize = new_stacksize;
2687 ++cctx_gen;
2688 }
1511 OUTPUT: 2689 OUTPUT:
1512 RETVAL 2690 RETVAL
1513 2691
1514int 2692int
2693cctx_max_idle (int max_idle = 0)
2694 PROTOTYPE: ;$
2695 CODE:
2696 RETVAL = cctx_max_idle;
2697 if (max_idle > 1)
2698 cctx_max_idle = max_idle;
2699 OUTPUT:
2700 RETVAL
2701
2702int
1515cctx_count () 2703cctx_count ()
2704 PROTOTYPE:
1516 CODE: 2705 CODE:
1517 RETVAL = cctx_count; 2706 RETVAL = cctx_count;
1518 OUTPUT: 2707 OUTPUT:
1519 RETVAL 2708 RETVAL
1520 2709
1521int 2710int
1522cctx_idle () 2711cctx_idle ()
2712 PROTOTYPE:
1523 CODE: 2713 CODE:
1524 RETVAL = cctx_idle; 2714 RETVAL = cctx_idle;
1525 OUTPUT: 2715 OUTPUT:
1526 RETVAL 2716 RETVAL
1527 2717
1528void 2718void
1529list () 2719list ()
2720 PROTOTYPE:
1530 PPCODE: 2721 PPCODE:
1531{ 2722{
1532 struct coro *coro; 2723 struct coro *coro;
1533 for (coro = coro_first; coro; coro = coro->next) 2724 for (coro = coro_first; coro; coro = coro->next)
1534 if (coro->hv) 2725 if (coro->hv)
… …
1539call (Coro::State coro, SV *coderef) 2730call (Coro::State coro, SV *coderef)
1540 ALIAS: 2731 ALIAS:
1541 eval = 1 2732 eval = 1
1542 CODE: 2733 CODE:
1543{ 2734{
1544 if (coro->mainstack) 2735 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1545 { 2736 {
1546 struct coro temp; 2737 struct coro temp;
1547 Zero (&temp, 1, struct coro);
1548 2738
1549 if (!(coro->flags & CF_RUNNING)) 2739 if (!(coro->flags & CF_RUNNING))
1550 { 2740 {
2741 PUTBACK;
1551 save_perl (aTHX_ &temp); 2742 save_perl (aTHX_ &temp);
1552 load_perl (aTHX_ coro); 2743 load_perl (aTHX_ coro);
1553 } 2744 }
1554 2745
1555 { 2746 {
1556 dSP; 2747 dSP;
1557 ENTER; 2748 ENTER;
1558 SAVETMPS; 2749 SAVETMPS;
2750 PUTBACK;
2751 PUSHSTACK;
1559 PUSHMARK (SP); 2752 PUSHMARK (SP);
1560 PUTBACK; 2753
1561 if (ix) 2754 if (ix)
1562 eval_sv (coderef, 0); 2755 eval_sv (coderef, 0);
1563 else 2756 else
1564 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2758
2759 POPSTACK;
1565 SPAGAIN; 2760 SPAGAIN;
1566 FREETMPS; 2761 FREETMPS;
1567 LEAVE; 2762 LEAVE;
1568 PUTBACK; 2763 PUTBACK;
1569 } 2764 }
1570 2765
1571 if (!(coro->flags & CF_RUNNING)) 2766 if (!(coro->flags & CF_RUNNING))
1572 { 2767 {
1573 save_perl (aTHX_ coro); 2768 save_perl (aTHX_ coro);
1574 load_perl (aTHX_ &temp); 2769 load_perl (aTHX_ &temp);
2770 SPAGAIN;
1575 } 2771 }
1576 } 2772 }
1577} 2773}
1578 2774
1579SV * 2775SV *
… …
1588 RETVAL = boolSV (coro->flags & ix); 2784 RETVAL = boolSV (coro->flags & ix);
1589 OUTPUT: 2785 OUTPUT:
1590 RETVAL 2786 RETVAL
1591 2787
1592void 2788void
2789throw (Coro::State self, SV *throw = &PL_sv_undef)
2790 PROTOTYPE: $;$
2791 CODE:
2792{
2793 struct coro *current = SvSTATE_current;
2794 SV **throwp = self == current ? &CORO_THROW : &self->except;
2795 SvREFCNT_dec (*throwp);
2796 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2797}
2798
2799void
1593api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2800api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2801 PROTOTYPE: $;$
2802 C_ARGS: aTHX_ coro, flags
1594 2803
1595SV * 2804SV *
1596has_stack (Coro::State coro) 2805has_cctx (Coro::State coro)
1597 PROTOTYPE: $ 2806 PROTOTYPE: $
1598 CODE: 2807 CODE:
1599 RETVAL = boolSV (!!coro->cctx); 2808 RETVAL = boolSV (!!coro->cctx);
1600 OUTPUT: 2809 OUTPUT:
1601 RETVAL 2810 RETVAL
… …
1606 CODE: 2815 CODE:
1607 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2816 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1608 OUTPUT: 2817 OUTPUT:
1609 RETVAL 2818 RETVAL
1610 2819
1611IV 2820UV
1612rss (Coro::State coro) 2821rss (Coro::State coro)
1613 PROTOTYPE: $ 2822 PROTOTYPE: $
1614 ALIAS: 2823 ALIAS:
1615 usecount = 1 2824 usecount = 1
1616 CODE: 2825 CODE:
… …
1620 case 1: RETVAL = coro->usecount; break; 2829 case 1: RETVAL = coro->usecount; break;
1621 } 2830 }
1622 OUTPUT: 2831 OUTPUT:
1623 RETVAL 2832 RETVAL
1624 2833
2834void
2835force_cctx ()
2836 PROTOTYPE:
2837 CODE:
2838 SvSTATE_current->cctx->idle_sp = 0;
2839
2840void
2841swap_defsv (Coro::State self)
2842 PROTOTYPE: $
2843 ALIAS:
2844 swap_defav = 1
2845 CODE:
2846 if (!self->slot)
2847 croak ("cannot swap state with coroutine that has no saved state,");
2848 else
2849 {
2850 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2851 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2852
2853 SV *tmp = *src; *src = *dst; *dst = tmp;
2854 }
2855
1625 2856
1626MODULE = Coro::State PACKAGE = Coro 2857MODULE = Coro::State PACKAGE = Coro
1627 2858
1628BOOT: 2859BOOT:
1629{ 2860{
1630 int i; 2861 int i;
1631 2862
1632 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1633 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1634 av_async_pool = get_av ("Coro::async_pool", TRUE); 2863 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2864 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2865 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1635 2866
1636 coro_current = get_sv ("Coro::current", FALSE); 2867 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1637 SvREADONLY_on (coro_current); 2868 SvREADONLY_on (coro_current);
1638 2869
1639 coro_stash = gv_stashpv ("Coro", TRUE); 2870 coro_stash = gv_stashpv ("Coro", TRUE);
1640 2871
1641 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2872 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1642 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2873 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1643 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2874 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1644 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2875 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1647 2878
1648 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2879 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1649 coro_ready[i] = newAV (); 2880 coro_ready[i] = newAV ();
1650 2881
1651 { 2882 {
1652 SV *sv = perl_get_sv("Coro::API", 1); 2883 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1653 2884
1654 coroapi.schedule = api_schedule; 2885 coroapi.schedule = api_schedule;
1655 coroapi.cede = api_cede; 2886 coroapi.cede = api_cede;
1656 coroapi.cede_notself = api_cede_notself; 2887 coroapi.cede_notself = api_cede_notself;
1657 coroapi.ready = api_ready; 2888 coroapi.ready = api_ready;
1658 coroapi.is_ready = api_is_ready; 2889 coroapi.is_ready = api_is_ready;
1659 coroapi.nready = &coro_nready; 2890 coroapi.nready = coro_nready;
1660 coroapi.current = coro_current; 2891 coroapi.current = coro_current;
1661 2892
1662 GCoroAPI = &coroapi; 2893 /*GCoroAPI = &coroapi;*/
1663 sv_setiv (sv, (IV)&coroapi); 2894 sv_setiv (sv, (IV)&coroapi);
1664 SvREADONLY_on (sv); 2895 SvREADONLY_on (sv);
1665 } 2896 }
1666} 2897}
2898
2899void
2900schedule (...)
2901 CODE:
2902 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2903
2904void
2905cede (...)
2906 CODE:
2907 CORO_EXECUTE_SLF_XS (slf_init_cede);
2908
2909void
2910cede_notself (...)
2911 CODE:
2912 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1667 2913
1668void 2914void
1669_set_current (SV *current) 2915_set_current (SV *current)
1670 PROTOTYPE: $ 2916 PROTOTYPE: $
1671 CODE: 2917 CODE:
1672 SvREFCNT_dec (SvRV (coro_current)); 2918 SvREFCNT_dec (SvRV (coro_current));
1673 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2919 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2920
2921void
2922_set_readyhook (SV *hook)
2923 PROTOTYPE: $
2924 CODE:
2925 SvREFCNT_dec (coro_readyhook);
2926 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1674 2927
1675int 2928int
1676prio (Coro::State coro, int newprio = 0) 2929prio (Coro::State coro, int newprio = 0)
2930 PROTOTYPE: $;$
1677 ALIAS: 2931 ALIAS:
1678 nice = 1 2932 nice = 1
1679 CODE: 2933 CODE:
1680{ 2934{
1681 RETVAL = coro->prio; 2935 RETVAL = coro->prio;
… …
1696 2950
1697SV * 2951SV *
1698ready (SV *self) 2952ready (SV *self)
1699 PROTOTYPE: $ 2953 PROTOTYPE: $
1700 CODE: 2954 CODE:
1701 RETVAL = boolSV (api_ready (self)); 2955 RETVAL = boolSV (api_ready (aTHX_ self));
1702 OUTPUT: 2956 OUTPUT:
1703 RETVAL 2957 RETVAL
1704 2958
1705int 2959int
1706nready (...) 2960nready (...)
… …
1713# for async_pool speedup 2967# for async_pool speedup
1714void 2968void
1715_pool_1 (SV *cb) 2969_pool_1 (SV *cb)
1716 CODE: 2970 CODE:
1717{ 2971{
1718 struct coro *coro = SvSTATE (coro_current);
1719 HV *hv = (HV *)SvRV (coro_current); 2972 HV *hv = (HV *)SvRV (coro_current);
2973 struct coro *coro = SvSTATE_hv ((SV *)hv);
1720 AV *defav = GvAV (PL_defgv); 2974 AV *defav = GvAV (PL_defgv);
1721 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2975 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1722 AV *invoke_av; 2976 AV *invoke_av;
1723 int i, len; 2977 int i, len;
1724 2978
1725 if (!invoke) 2979 if (!invoke)
2980 {
2981 SV *old = PL_diehook;
2982 PL_diehook = 0;
2983 SvREFCNT_dec (old);
1726 croak ("\3terminate\2\n"); 2984 croak ("\3async_pool terminate\2\n");
2985 }
1727 2986
1728 SvREFCNT_dec (coro->saved_deffh); 2987 SvREFCNT_dec (coro->saved_deffh);
1729 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2988 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1730 2989
1731 hv_store (hv, "desc", sizeof ("desc") - 1, 2990 hv_store (hv, "desc", sizeof ("desc") - 1,
1732 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2991 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1733 2992
1734 invoke_av = (AV *)SvRV (invoke); 2993 invoke_av = (AV *)SvRV (invoke);
… …
1738 2997
1739 if (len > 0) 2998 if (len > 0)
1740 { 2999 {
1741 av_fill (defav, len - 1); 3000 av_fill (defav, len - 1);
1742 for (i = 0; i < len; ++i) 3001 for (i = 0; i < len; ++i)
1743 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3002 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1744 } 3003 }
1745
1746 SvREFCNT_dec (invoke);
1747} 3004}
1748 3005
1749void 3006void
1750_pool_2 (SV *cb) 3007_pool_2 (SV *cb)
1751 CODE: 3008 CODE:
1752{ 3009{
1753 struct coro *coro = SvSTATE (coro_current); 3010 HV *hv = (HV *)SvRV (coro_current);
3011 struct coro *coro = SvSTATE_hv ((SV *)hv);
1754 3012
1755 sv_setsv (cb, &PL_sv_undef); 3013 sv_setsv (cb, &PL_sv_undef);
1756 3014
1757 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 3015 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1758 coro->saved_deffh = 0; 3016 coro->saved_deffh = 0;
1759 3017
1760 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 3018 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1761 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 3019 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3020 {
3021 SV *old = PL_diehook;
3022 PL_diehook = 0;
3023 SvREFCNT_dec (old);
1762 croak ("\3terminate\2\n"); 3024 croak ("\3async_pool terminate\2\n");
3025 }
1763 3026
1764 av_clear (GvAV (PL_defgv)); 3027 av_clear (GvAV (PL_defgv));
1765 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 3028 hv_store (hv, "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 3029 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1767 3030
1768 coro->prio = 0; 3031 coro->prio = 0;
1769 3032
1770 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 3033 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1771 api_trace (coro_current, 0); 3034 api_trace (aTHX_ coro_current, 0);
1772 3035
1773 av_push (av_async_pool, newSVsv (coro_current)); 3036 av_push (av_async_pool, newSVsv (coro_current));
1774} 3037}
1775 3038
1776
1777MODULE = Coro::State PACKAGE = Coro::AIO
1778
1779SV * 3039SV *
1780_get_state () 3040rouse_cb ()
3041 PROTOTYPE:
1781 CODE: 3042 CODE:
1782{ 3043 RETVAL = coro_new_rouse_cb (aTHX);
1783 struct io_state *data;
1784
1785 RETVAL = newSV (sizeof (struct io_state));
1786 data = (struct io_state *)SvPVX (RETVAL);
1787 SvCUR_set (RETVAL, sizeof (struct io_state));
1788 SvPOK_only (RETVAL);
1789
1790 data->errorno = errno;
1791 data->laststype = PL_laststype;
1792 data->laststatval = PL_laststatval;
1793 data->statcache = PL_statcache;
1794}
1795 OUTPUT: 3044 OUTPUT:
1796 RETVAL 3045 RETVAL
1797 3046
1798void 3047void
1799_set_state (char *data_) 3048rouse_wait (...)
1800 PROTOTYPE: $ 3049 PROTOTYPE: ;$
3050 PPCODE:
3051 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3052
3053
3054MODULE = Coro::State PACKAGE = PerlIO::cede
3055
3056BOOT:
3057 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3058
3059
3060MODULE = Coro::State PACKAGE = Coro::Semaphore
3061
3062SV *
3063new (SV *klass, SV *count = 0)
1801 CODE: 3064 CODE:
1802{ 3065 RETVAL = sv_bless (
1803 struct io_state *data = (void *)data_; 3066 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3067 GvSTASH (CvGV (cv))
3068 );
3069 OUTPUT:
3070 RETVAL
1804 3071
1805 errno = data->errorno; 3072# helper for Coro::Channel
1806 PL_laststype = data->laststype; 3073SV *
1807 PL_laststatval = data->laststatval; 3074_alloc (int count)
1808 PL_statcache = data->statcache; 3075 CODE:
1809} 3076 RETVAL = coro_waitarray_new (aTHX_ count);
3077 OUTPUT:
3078 RETVAL
1810 3079
3080SV *
3081count (SV *self)
3082 CODE:
3083 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3084 OUTPUT:
3085 RETVAL
3086
3087void
3088up (SV *self, int adjust = 1)
3089 ALIAS:
3090 adjust = 1
3091 CODE:
3092 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3093
3094void
3095down (...)
3096 CODE:
3097 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3098
3099void
3100wait (...)
3101 CODE:
3102 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3103
3104void
3105try (SV *self)
3106 PPCODE:
3107{
3108 AV *av = (AV *)SvRV (self);
3109 SV *count_sv = AvARRAY (av)[0];
3110 IV count = SvIVX (count_sv);
3111
3112 if (count > 0)
3113 {
3114 --count;
3115 SvIVX (count_sv) = count;
3116 XSRETURN_YES;
3117 }
3118 else
3119 XSRETURN_NO;
3120}
3121
3122void
3123waiters (SV *self)
3124 PPCODE:
3125{
3126 AV *av = (AV *)SvRV (self);
3127 int wcount = AvFILLp (av) + 1 - 1;
3128
3129 if (GIMME_V == G_SCALAR)
3130 XPUSHs (sv_2mortal (newSViv (wcount)));
3131 else
3132 {
3133 int i;
3134 EXTEND (SP, wcount);
3135 for (i = 1; i <= wcount; ++i)
3136 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3137 }
3138}
3139
3140MODULE = Coro::State PACKAGE = Coro::Signal
3141
3142SV *
3143new (SV *klass)
3144 CODE:
3145 RETVAL = sv_bless (
3146 coro_waitarray_new (aTHX_ 0),
3147 GvSTASH (CvGV (cv))
3148 );
3149 OUTPUT:
3150 RETVAL
3151
3152void
3153wait (...)
3154 CODE:
3155 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3156
3157void
3158broadcast (SV *self)
3159 CODE:
3160{
3161 AV *av = (AV *)SvRV (self);
3162 coro_signal_wake (aTHX_ av, AvFILLp (av));
3163}
3164
3165void
3166send (SV *self)
3167 CODE:
3168{
3169 AV *av = (AV *)SvRV (self);
3170
3171 if (AvFILLp (av))
3172 coro_signal_wake (aTHX_ av, 1);
3173 else
3174 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3175}
3176
3177IV
3178awaited (SV *self)
3179 CODE:
3180 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3181 OUTPUT:
3182 RETVAL
3183
3184
3185MODULE = Coro::State PACKAGE = Coro::AnyEvent
3186
3187BOOT:
3188 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3189
3190void
3191_schedule (...)
3192 CODE:
3193{
3194 static int incede;
3195
3196 api_cede_notself (aTHX);
3197
3198 ++incede;
3199 while (coro_nready >= incede && api_cede (aTHX))
3200 ;
3201
3202 sv_setsv (sv_activity, &PL_sv_undef);
3203 if (coro_nready >= incede)
3204 {
3205 PUSHMARK (SP);
3206 PUTBACK;
3207 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3208 }
3209
3210 --incede;
3211}
3212
3213
3214MODULE = Coro::State PACKAGE = Coro::AIO
3215
3216void
3217_register (char *target, char *proto, SV *req)
3218 CODE:
3219{
3220 CV *req_cv = coro_sv_2cv (req);
3221 /* newXSproto doesn't return the CV on 5.8 */
3222 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3223 sv_setpv ((SV *)slf_cv, proto);
3224 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3225}
3226

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