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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 1.301 by root, Wed Nov 19 02:41:31 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, don't ask
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 AV *args; /* data associated with this coroutine (initial args) */
252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
213 256
214 /* statistics */ 257 /* statistics */
215 int usecount; /* number of transfers to this coro */ 258 int usecount; /* number of transfers to this coro */
216 259
217 /* coro process data */ 260 /* coro process data */
218 int prio; 261 int prio;
219 //SV *throw; 262 SV *except; /* exception to be thrown */
220 263
221 /* async_pool */ 264 /* async_pool */
222 SV *saved_deffh; 265 SV *saved_deffh;
223 266
224 /* linked list */ 267 /* linked list */
225 struct coro *next, *prev; 268 struct coro *next, *prev;
226 HV *hv; /* the perl hash associated with this coro, if any */
227}; 269};
228 270
229typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
230typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
231 278
232/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
233 280
234#define PRIO_MAX 3 281#define PRIO_MAX 3
235#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
238#define PRIO_IDLE -3 285#define PRIO_IDLE -3
239#define PRIO_MIN -4 286#define PRIO_MIN -4
240 287
241/* for Coro.pm */ 288/* for Coro.pm */
242static SV *coro_current; 289static SV *coro_current;
290static SV *coro_readyhook;
243static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
244static int coro_nready;
245static struct coro *coro_first; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
246 294
247/** lowlevel stuff **********************************************************/ 295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
248 326
249static AV * 327static AV *
250coro_clone_padlist (pTHX_ CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
251{ 329{
252 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
253 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
254 332
255 newpadlist = newAV (); 333 newpadlist = newAV ();
256 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
257#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
258 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
259#else 337#else
260 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
261#endif 339#endif
262 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
263 --AvFILLp (padlist); 341 --AvFILLp (padlist);
264 342
265 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
266 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
267 345
268 return newpadlist; 346 return newpadlist;
269} 347}
270 348
… …
300 378
301 /* casting is fun. */ 379 /* casting is fun. */
302 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
303 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
304 382
305 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
306 384
307 return 0; 385 return 0;
308} 386}
309 387
388#define CORO_MAGIC_type_cv 26
310#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
311 390
312static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
313 395
314#define CORO_MAGIC(cv) \ 396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
315 SvMAGIC (cv) \ 398 ? SvMAGIC (sv) \
316 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 399 : mg_find (sv, type))
317 ? SvMAGIC (cv) \ 400
318 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
319 : 0 404 : 0)
320 405
321static struct coro * 406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
322SvSTATE_ (pTHX_ SV *coro) 410SvSTATE_ (pTHX_ SV *coro)
323{ 411{
324 HV *stash; 412 HV *stash;
325 MAGIC *mg; 413 MAGIC *mg;
326 414
327 if (SvROK (coro)) 415 if (SvROK (coro))
328 coro = SvRV (coro); 416 coro = SvRV (coro);
329 417
330 if (SvTYPE (coro) != SVt_PVHV) 418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
331 croak ("Coro::State object required"); 419 croak ("Coro::State object required");
332 420
333 stash = SvSTASH (coro); 421 stash = SvSTASH (coro);
334 if (stash != coro_stash && stash != coro_state_stash) 422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
335 { 423 {
336 /* very slow, but rare, check */ 424 /* very slow, but rare, check */
337 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
338 croak ("Coro::State object required"); 426 croak ("Coro::State object required");
339 } 427 }
340 428
341 mg = CORO_MAGIC (coro); 429 mg = CORO_MAGIC_state (coro);
342 return (struct coro *)mg->mg_ptr; 430 return (struct coro *)mg->mg_ptr;
343} 431}
344 432
345#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
346 434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
438
347/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
348static void 440static void
349get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
350{ 442{
351 MAGIC *mg = CORO_MAGIC (cv); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
352 AV *av; 444 AV *av;
353 445
354 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
355 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
356 else 448 else
357 { 449 {
358#if CORO_PREFER_PERL_FUNCTIONS 450#if CORO_PREFER_PERL_FUNCTIONS
359 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
360 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
361 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
362 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
363 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
364#else 457#else
… …
368} 461}
369 462
370static void 463static void
371put_padlist (pTHX_ CV *cv) 464put_padlist (pTHX_ CV *cv)
372{ 465{
373 MAGIC *mg = CORO_MAGIC (cv); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
374 AV *av; 467 AV *av;
375 468
376 if (!mg) 469 if (expect_false (!mg))
377 { 470 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 }
383 471
384 av = (AV *)mg->mg_obj; 472 av = (AV *)mg->mg_obj;
385 473
386 if (AvFILLp (av) >= AvMAX (av)) 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
387 av_extend (av, AvMAX (av) + 1); 475 av_extend (av, AvMAX (av) + 1);
388 476
389 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
390} 478}
391 479
392/** load & save, init *******************************************************/ 480/** load & save, init *******************************************************/
393 481
394static void 482static void
395load_perl (pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
396{ 484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
397#define VAR(name,type) PL_ ## name = c->name; 495 #define VAR(name,type) PL_ ## name = slot->name;
398# include "state.h" 496 # include "state.h"
399#undef VAR 497 #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;
405 498
406 { 499 {
407 dSP; 500 dSP;
501
408 CV *cv; 502 CV *cv;
409 503
410 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
412 { 506 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 508 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 509 CvPADLIST (cv) = (AV *)POPs;
416 } 510 }
417 511
418 PUTBACK; 512 PUTBACK;
419 } 513 }
514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
420} 517}
421 518
422static void 519static void
423save_perl (pTHX_ Coro__State c) 520save_perl (pTHX_ Coro__State c)
424{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
425 { 525 {
426 dSP; 526 dSP;
427 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
435 535
436 XPUSHs (Nullsv); 536 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
438 for (;;) 538 for (;;)
439 { 539 {
440 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
441 { 541 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
443 543
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
445 { 545 {
446 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
447 547
448 if (CvDEPTH (cv)) 548 if (expect_true (CvDEPTH (cv)))
449 { 549 {
450 EXTEND (SP, 3); 550 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
454 554
455 CvDEPTH (cv) = 0; 555 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 556 get_padlist (aTHX_ cv);
457 } 557 }
458 } 558 }
459 } 559 }
460 560
461 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 562 break;
463 563
464 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
467 } 567 }
468 568
469 PUTBACK; 569 PUTBACK;
470 } 570 }
471 571
572 /* allocate some space on the context stack for our purposes */
573 /* we manually unroll here, as usually 2 slots is enough */
574 if (SLOT_COUNT >= 1) CXINC;
575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
472 c->defav = GvAV (PL_defgv); 589 slot->defav = GvAV (PL_defgv);
473 c->defsv = DEFSV; 590 slot->defsv = DEFSV;
474 c->errsv = ERRSV; 591 slot->errsv = ERRSV;
475 c->irssv_sv = GvSV (irsgv); 592 slot->irsgv = GvSV (irsgv);
476 593
477#define VAR(name,type)c->name = PL_ ## name; 594 #define VAR(name,type) slot->name = PL_ ## name;
478# include "state.h" 595 # include "state.h"
479#undef VAR 596 #undef VAR
597 }
480} 598}
481 599
482/* 600/*
483 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
484 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
485 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
486 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
487 */ 605 */
488#if CORO_PREFER_PERL_FUNCTIONS 606#if CORO_PREFER_PERL_FUNCTIONS
489# define coro_init_stacks init_stacks 607# define coro_init_stacks init_stacks
490#else 608#else
491static void 609static void
492coro_init_stacks (pTHX) 610coro_init_stacks (pTHX)
493{ 611{
494 PL_curstackinfo = new_stackinfo(64, 6); 612 PL_curstackinfo = new_stackinfo(32, 8);
495 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
496 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
498 616
499 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
500 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
502 620
503 New(50,PL_tmps_stack,64,SV*); 621 New(50,PL_tmps_stack,32,SV*);
504 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
505 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
506 PL_tmps_max = 64; 624 PL_tmps_max = 32;
507 625
508 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
509 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
510 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
511 629
512#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
513 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
514#endif 632#endif
515 633
516 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
517 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
518 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
519 637
520 New(54,PL_savestack,64,ANY); 638 New(54,PL_savestack,24,ANY);
521 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
522 PL_savestack_max = 64; 640 PL_savestack_max = 24;
523 641
524#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,4,OP*); 643 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
527 PL_retstack_max = 4; 645 PL_retstack_max = 4;
528#endif 646#endif
529} 647}
… …
531 649
532/* 650/*
533 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
534 */ 652 */
535static void 653static void
536coro_destroy_stacks (pTHX) 654coro_destruct_stacks (pTHX)
537{ 655{
538 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
540 658
541 while (PL_curstackinfo) 659 while (PL_curstackinfo)
… …
552 670
553 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
554 Safefree (PL_markstack); 672 Safefree (PL_markstack);
555 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
556 Safefree (PL_savestack); 674 Safefree (PL_savestack);
557#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree (PL_retstack); 676 Safefree (PL_retstack);
559#endif 677#endif
560} 678}
561 679
562static size_t 680static size_t
… …
564{ 682{
565 size_t rss = sizeof (*coro); 683 size_t rss = sizeof (*coro);
566 684
567 if (coro->mainstack) 685 if (coro->mainstack)
568 { 686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
569 if (coro->flags & CF_RUNNING) 690 if (coro->flags & CF_RUNNING)
570 { 691 {
692 slot = &tmp_slot;
693
571 #define VAR(name,type)coro->name = PL_ ## name; 694 #define VAR(name,type) slot->name = PL_ ## name;
572 # include "state.h" 695 # include "state.h"
573 #undef VAR 696 #undef VAR
574 } 697 }
698 else
699 slot = coro->slot;
575 700
701 if (slot)
702 {
576 rss += sizeof (coro->curstackinfo); 703 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); 704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
579 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
580 rss += coro->tmps_max * sizeof (SV *); 706 rss += slot->tmps_max * sizeof (SV *);
581 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
582 rss += coro->scopestack_max * sizeof (I32); 708 rss += slot->scopestack_max * sizeof (I32);
583 rss += coro->savestack_max * sizeof (ANY); 709 rss += slot->savestack_max * sizeof (ANY);
584 710
585#if !PERL_VERSION_ATLEAST (5,9,0) 711#if !PERL_VERSION_ATLEAST (5,10,0)
586 rss += coro->retstack_max * sizeof (OP *); 712 rss += slot->retstack_max * sizeof (OP *);
587#endif 713#endif
714 }
588 } 715 }
589 716
590 return rss; 717 return rss;
591} 718}
592 719
593/** coroutine stack handling ************************************************/ 720/** coroutine stack handling ************************************************/
594 721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
595static void 742static int
743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
596coro_setup (pTHX_ struct coro *coro) 828coro_setup (pTHX_ struct coro *coro)
597{ 829{
598 /* 830 /*
599 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
600 */ 832 */
… …
603 PL_runops = RUNOPS_DEFAULT; 835 PL_runops = RUNOPS_DEFAULT;
604 PL_curcop = &PL_compiling; 836 PL_curcop = &PL_compiling;
605 PL_in_eval = EVAL_NULL; 837 PL_in_eval = EVAL_NULL;
606 PL_comppad = 0; 838 PL_comppad = 0;
607 PL_curpm = 0; 839 PL_curpm = 0;
840 PL_curpad = 0;
608 PL_localizing = 0; 841 PL_localizing = 0;
609 PL_dirty = 0; 842 PL_dirty = 0;
610 PL_restartop = 0; 843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
611 851
612 GvSV (PL_defgv) = newSV (0); 852 GvSV (PL_defgv) = newSV (0);
613 GvAV (PL_defgv) = coro->args; coro->args = 0; 853 GvAV (PL_defgv) = coro->args; coro->args = 0;
614 GvSV (PL_errgv) = newSV (0); 854 GvSV (PL_errgv) = newSV (0);
615 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
616 PL_rs = newSVsv (GvSV (irsgv)); 856 PL_rs = newSVsv (GvSV (irsgv));
617 PL_defoutgv = SvREFCNT_inc (stdoutgv); 857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
618
619 ENTER; /* necessary e.g. for dounwind */
620 858
621 { 859 {
622 dSP; 860 dSP;
623 LOGOP myop; 861 UNOP myop;
624 862
625 Zero (&myop, 1, LOGOP); 863 Zero (&myop, 1, UNOP);
626 myop.op_next = Nullop; 864 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID; 865 myop.op_flags = OPf_WANT_VOID;
628 866
629 PUSHMARK (SP); 867 PUSHMARK (SP);
630 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
631 PUTBACK; 869 PUTBACK;
632 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
633 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
634 SPAGAIN; 872 SPAGAIN;
635 } 873 }
636}
637 874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
638static void 893static void
639coro_destroy (pTHX_ struct coro *coro) 894coro_destruct (pTHX_ struct coro *coro)
640{ 895{
641 if (!IN_DESTRUCT) 896 if (!IN_DESTRUCT)
642 { 897 {
643 /* restore all saved variables and stuff */ 898 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 899 LEAVE_SCOPE (0);
… …
660 SvREFCNT_dec (GvSV (PL_errgv)); 915 SvREFCNT_dec (GvSV (PL_errgv));
661 SvREFCNT_dec (PL_defoutgv); 916 SvREFCNT_dec (PL_defoutgv);
662 SvREFCNT_dec (PL_rs); 917 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv)); 918 SvREFCNT_dec (GvSV (irsgv));
664 919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
665 SvREFCNT_dec (coro->saved_deffh); 923 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 924 SvREFCNT_dec (CORO_THROW);
667 925
668 coro_destroy_stacks (aTHX); 926 coro_destruct_stacks (aTHX);
669} 927}
670 928
671static void 929INLINE void
672free_coro_mortal (pTHX) 930free_coro_mortal (pTHX)
673{ 931{
674 if (coro_mortal) 932 if (expect_true (coro_mortal))
675 { 933 {
676 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
677 coro_mortal = 0; 935 coro_mortal = 0;
678 } 936 }
679} 937}
… …
681static int 939static int
682runops_trace (pTHX) 940runops_trace (pTHX)
683{ 941{
684 COP *oldcop = 0; 942 COP *oldcop = 0;
685 int oldcxix = -2; 943 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx; 945 coro_cctx *cctx = coro->cctx;
688 946
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 948 {
691 PERL_ASYNC_CHECK (); 949 PERL_ASYNC_CHECK ();
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 966 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 967 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 968 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 969 : bot;
712 970
971 av_extend (av, top - bot);
713 while (bot < top) 972 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 973 av_push (av, SvREFCNT_inc_NN (*bot++));
715 974
716 PL_runops = RUNOPS_DEFAULT; 975 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 976 ENTER;
718 SAVETMPS; 977 SAVETMPS;
719 EXTEND (SP, 3); 978 EXTEND (SP, 3);
… …
757 SAVETMPS; 1016 SAVETMPS;
758 EXTEND (SP, 3); 1017 EXTEND (SP, 3);
759 PUSHMARK (SP); 1018 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1019 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1020 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1022 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1023 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); 1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1025 SPAGAIN;
767 FREETMPS; 1026 FREETMPS;
… …
799 1058
800 TAINT_NOT; 1059 TAINT_NOT;
801 return 0; 1060 return 0;
802} 1061}
803 1062
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1063static struct coro_cctx *cctx_ssl_cctx;
805/* _cctx_init should be careful, as it could be called at almost any time */ 1064static struct CoroSLF cctx_ssl_frame;
806/* during execution of a perl program */ 1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
807static void NOINLINE 1082static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
809{ 1084{
810 dSP;
811 LOGOP myop;
812
813 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
814 1086
815 if (cctx->flags & CC_TRACE) 1087 if (cctx->flags & CC_TRACE)
816 PL_runops = runops_trace; 1088 PL_runops = runops_trace;
817 1089
818 Zero (&myop, 1, LOGOP); 1090 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1091 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1094
822 PUSHMARK (SP); 1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1096 cctx_ssl_cctx = cctx;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1097 cctx_ssl_frame = slf_frame;
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1098
826 PUTBACK; 1099 slf_frame.prepare = slf_prepare_set_stacklevel;
827 PL_op = (OP *)&myop; 1100 slf_frame.check = slf_check_set_stacklevel;
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1101}
829 SPAGAIN; 1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
830} 1108}
831 1109
832/* 1110/*
833 * this is a _very_ stripped down perl interpreter ;) 1111 * this is a _very_ stripped down perl interpreter ;)
834 */ 1112 */
835static void 1113static void
836coro_run (void *arg) 1114cctx_run (void *arg)
837{ 1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
838 dTHX; 1122 dTHX;
839 1123
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1124 /* normally we would need to skip the entersub here */
841 UNLOCK; 1125 /* 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; 1126 /* PL_nop = PL_nop->op_next */
845 1127
846 /* inject a fake subroutine call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
848 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1135 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
852 1137
853 /* 1138 /*
854 * If perl-run returns we assume exit() was being called or the coro 1139 * 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) 1140 * 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 1141 * 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" 1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
858 * coroutine as Coro has no such concept 1143 * coroutine as Coro has no such concept
859 */ 1144 */
860 PL_top_env = main_top_env; 1145 PL_top_env = main_top_env;
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
862} 1148}
863 1149
864static coro_cctx * 1150static coro_cctx *
865cctx_new () 1151cctx_new ()
866{ 1152{
867 coro_cctx *cctx; 1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
868 void *stack_start; 1182 void *stack_start;
869 size_t stack_size; 1183 size_t stack_size;
870 1184
871 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx);
874
875#if HAVE_MMAP 1185#if HAVE_MMAP
876
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
878 /* mmap supposedly does allocate-on-write for us */ 1187 /* 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); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1189
881 if (cctx->sptr != (void *)-1) 1190 if (cctx->sptr != (void *)-1)
882 { 1191 {
883# if CORO_STACKGUARD 1192 #if CORO_STACKGUARD
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
885# endif 1194 #endif
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED; 1197 cctx->flags |= CC_MAPPED;
889 } 1198 }
890 else 1199 else
891#endif 1200#endif
892 { 1201 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long); 1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long); 1203 New (0, cctx->sptr, cctx_stacksize, long);
895 1204
896 if (!cctx->sptr) 1205 if (!cctx->sptr)
897 { 1206 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
900 } 1209 }
901 1210
902 stack_start = cctx->sptr; 1211 stack_start = cctx->sptr;
903 stack_size = cctx->ssize; 1212 stack_size = cctx->ssize;
904 } 1213 }
905 1214
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
908 1220
909 return cctx; 1221 return cctx;
910} 1222}
911 1223
912static void 1224static void
… …
914{ 1226{
915 if (!cctx) 1227 if (!cctx)
916 return; 1228 return;
917 1229
918 --cctx_count; 1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
919 1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
920#if CORO_USE_VALGRIND 1236 #if CORO_USE_VALGRIND
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif 1238 #endif
923 1239
924#if HAVE_MMAP 1240#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED) 1241 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize); 1242 munmap (cctx->sptr, cctx->ssize);
927 else 1243 else
928#endif 1244#endif
929 Safefree (cctx->sptr); 1245 Safefree (cctx->sptr);
1246 }
930 1247
931 Safefree (cctx); 1248 Safefree (cctx);
932} 1249}
1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1253
934static coro_cctx * 1254static coro_cctx *
935cctx_get (pTHX) 1255cctx_get (pTHX)
936{ 1256{
937 while (cctx_first) 1257 while (expect_true (cctx_first))
938 { 1258 {
939 coro_cctx *cctx = cctx_first; 1259 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1260 cctx_first = cctx->next;
941 --cctx_idle; 1261 --cctx_idle;
942 1262
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1264 return cctx;
945 1265
946 cctx_destroy (cctx); 1266 cctx_destroy (cctx);
947 } 1267 }
948 1268
949 return cctx_new (); 1269 return cctx_new_run ();
950} 1270}
951 1271
952static void 1272static void
953cctx_put (coro_cctx *cctx) 1273cctx_put (coro_cctx *cctx)
954{ 1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
955 /* free another cctx if overlimit */ 1277 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1278 if (expect_false (cctx_idle >= cctx_max_idle))
957 { 1279 {
958 coro_cctx *first = cctx_first; 1280 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1281 cctx_first = first->next;
960 --cctx_idle; 1282 --cctx_idle;
961 1283
… …
967 cctx_first = cctx; 1289 cctx_first = cctx;
968} 1290}
969 1291
970/** coroutine switching *****************************************************/ 1292/** coroutine switching *****************************************************/
971 1293
972static void NOINLINE 1294static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1296{
975 if (prev != next) 1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
976 { 1300 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1301 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"); 1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
979 1303
980 if (next->flags & CF_RUNNING) 1304 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"); 1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
982 1306
983 if (next->flags & CF_DESTROYED) 1307 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"); 1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
985 1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
988 } 1314 }
989} 1315}
990 1316
991/* always use the TRANSFER macro */ 1317/* always use the TRANSFER macro */
992static void NOINLINE 1318static void NOINLINE /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1320{
995 dSTACKLEVEL; 1321 dSTACKLEVEL;
996 1322
997 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1324 if (expect_false (!next))
999 { 1325 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1326 ((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 */ 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 } 1328 }
1003 else if (prev != next) 1329 else if (expect_true (prev != next))
1004 { 1330 {
1005 coro_cctx *prev__cctx; 1331 coro_cctx *prev__cctx;
1006 1332
1007 if (prev->flags & CF_NEW) 1333 if (expect_false (prev->flags & CF_NEW))
1008 { 1334 {
1009 /* create a new empty context */ 1335 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx); 1336 prev->cctx = cctx_new_empty ();
1011 prev->flags &= ~CF_NEW; 1337 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1338 prev->flags |= CF_RUNNING;
1013 } 1339 }
1014 1340
1015 prev->flags &= ~CF_RUNNING; 1341 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1342 next->flags |= CF_RUNNING;
1017 1343
1018 LOCK; 1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
1019 1346
1020 if (next->flags & CF_NEW) 1347 if (expect_false (next->flags & CF_NEW))
1021 { 1348 {
1022 /* need to start coroutine */ 1349 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1350 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1351 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1352 coro_setup (aTHX_ next);
1028 } 1353 }
1029 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
1030 { 1365 {
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 */ 1366 /* 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)); 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1043 1368
1044 prev->cctx = 0; 1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1045 1376
1046 cctx_put (prev__cctx); 1377 cctx_put (prev__cctx);
1047 } 1378 }
1048 1379
1049 ++next->usecount; 1380 ++next->usecount;
1050 1381
1051 if (!next->cctx) 1382 if (expect_true (!next->cctx))
1052 next->cctx = cctx_get (aTHX); 1383 next->cctx = cctx_get (aTHX);
1053 1384
1054 if (prev__cctx != next->cctx) 1385 if (expect_false (prev__cctx != next->cctx))
1055 { 1386 {
1056 prev__cctx->top_env = PL_top_env; 1387 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env; 1388 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 } 1390 }
1060 1391
1061 free_coro_mortal (aTHX); 1392 transfer_tail (aTHX);
1062 UNLOCK;
1063 } 1393 }
1064} 1394}
1065 1395
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1396#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) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1398
1074/** high level stuff ********************************************************/ 1399/** high level stuff ********************************************************/
1075 1400
1076static int 1401static int
1077coro_state_destroy (pTHX_ struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1403{
1079 if (coro->flags & CF_DESTROYED) 1404 if (coro->flags & CF_DESTROYED)
1080 return 0; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1081 1409
1082 coro->flags |= CF_DESTROYED; 1410 coro->flags |= CF_DESTROYED;
1083 1411
1084 if (coro->flags & CF_READY) 1412 if (coro->flags & CF_READY)
1085 { 1413 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1415 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1416 --coro_nready;
1090 UNLOCK;
1091 } 1417 }
1092 else 1418 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094 1420
1095 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 { 1422 {
1097 struct coro temp; 1423 struct coro temp;
1098 1424
1099 if (coro->flags & CF_RUNNING) 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101 1426
1102 save_perl (aTHX_ &temp); 1427 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro); 1428 load_perl (aTHX_ coro);
1104 1429
1105 coro_destroy (aTHX_ coro); 1430 coro_destruct (aTHX_ coro);
1106 1431
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
1108 1433
1109 coro->mainstack = 0; 1434 coro->slot = 0;
1110 } 1435 }
1111 1436
1112 cctx_destroy (coro->cctx); 1437 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
1114 1439
… …
1156# define MGf_DUP 0 1481# define MGf_DUP 0
1157#endif 1482#endif
1158}; 1483};
1159 1484
1160static void 1485static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1487{
1163 ta->prev = SvSTATE (prev_sv); 1488 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1489 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1490 TRANSFER_CHECK (*ta);
1166} 1491}
1167 1492
1168static void 1493static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1170{ 1495{
1171 dTHX;
1172 struct transfer_args ta; 1496 struct coro_transfer_args ta;
1173 1497
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1175 TRANSFER (ta); 1499 TRANSFER (ta, 1);
1176} 1500}
1177 1501
1178/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
1179 1503
1180static void 1504INLINE void
1181coro_enq (pTHX_ SV *coro_sv) 1505coro_enq (pTHX_ struct coro *coro)
1182{ 1506{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1184} 1508}
1185 1509
1186static SV * 1510INLINE SV *
1187coro_deq (pTHX_ int min_prio) 1511coro_deq (pTHX)
1188{ 1512{
1189 int prio = PRIO_MAX - PRIO_MIN; 1513 int prio;
1190 1514
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; ) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1196 if (AvFILLp (coro_ready [prio]) >= 0) 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]); 1517 return av_shift (coro_ready [prio]);
1198 1518
1199 return 0; 1519 return 0;
1200} 1520}
1201 1521
1202static int 1522static int
1203api_ready (SV *coro_sv) 1523api_ready (pTHX_ SV *coro_sv)
1204{ 1524{
1205 dTHX;
1206 struct coro *coro; 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1207 1528
1208 if (SvROK (coro_sv)) 1529 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv); 1530 coro_sv = SvRV (coro_sv);
1210 1531
1211 coro = SvSTATE (coro_sv); 1532 coro = SvSTATE (coro_sv);
… …
1213 if (coro->flags & CF_READY) 1534 if (coro->flags & CF_READY)
1214 return 0; 1535 return 0;
1215 1536
1216 coro->flags |= CF_READY; 1537 coro->flags |= CF_READY;
1217 1538
1218 LOCK; 1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1220 ++coro_nready; 1543 ++coro_nready;
1221 UNLOCK; 1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1222 1562
1223 return 1; 1563 return 1;
1224} 1564}
1225 1565
1226static int 1566static int
1227api_is_ready (SV *coro_sv) 1567api_is_ready (pTHX_ SV *coro_sv)
1228{ 1568{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1570}
1232 1571
1233static void 1572INLINE void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1235{ 1574{
1236 SV *prev_sv, *next_sv; 1575 SV *prev_sv, *next_sv;
1237 1576
1238 for (;;) 1577 for (;;)
1239 { 1578 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN); 1579 next_sv = coro_deq (aTHX);
1242 1580
1243 /* nothing to schedule: call the idle handler */ 1581 /* nothing to schedule: call the idle handler */
1244 if (!next_sv) 1582 if (expect_false (!next_sv))
1245 { 1583 {
1246 dSP; 1584 dSP;
1247 UNLOCK;
1248 1585
1249 ENTER; 1586 ENTER;
1250 SAVETMPS; 1587 SAVETMPS;
1251 1588
1252 PUSHMARK (SP); 1589 PUSHMARK (SP);
1253 PUTBACK; 1590 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1255 1592
1256 FREETMPS; 1593 FREETMPS;
1257 LEAVE; 1594 LEAVE;
1258 continue; 1595 continue;
1259 } 1596 }
1260 1597
1261 ta->next = SvSTATE (next_sv); 1598 ta->next = SvSTATE_hv (next_sv);
1262 1599
1263 /* cannot transfer to destroyed coros, skip and look for next */ 1600 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED) 1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1265 { 1602 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv); 1603 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */ 1604 /* coro_nready has already been taken care of by destroy */
1269 continue; 1605 continue;
1270 } 1606 }
1271 1607
1272 --coro_nready; 1608 --coro_nready;
1273 UNLOCK;
1274 break; 1609 break;
1275 } 1610 }
1276 1611
1277 /* free this only after the transfer */ 1612 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1613 prev_sv = SvRV (coro_current);
1279 ta->prev = SvSTATE (prev_sv); 1614 ta->prev = SvSTATE_hv (prev_sv);
1280 TRANSFER_CHECK (*ta); 1615 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1282 ta->next->flags &= ~CF_READY; 1617 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1618 SvRV_set (coro_current, next_sv);
1284 1619
1285 LOCK;
1286 free_coro_mortal (aTHX); 1620 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1621 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1622}
1290 1623
1291static void 1624INLINE void
1292prepare_cede (pTHX_ struct transfer_args *ta) 1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 1626{
1294 api_ready (coro_current); 1627 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 1628 prepare_schedule (aTHX_ ta);
1296} 1629}
1297 1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1298static int 1654static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 1655api_cede (pTHX)
1300{ 1656{
1301 if (coro_nready) 1657 struct coro_transfer_args ta;
1302 { 1658
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 1659 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1306 return 1; 1664 return 1;
1307 } 1665 }
1308 else 1666 else
1309 return 0; 1667 return 0;
1310} 1668}
1311 1669
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 1670static int
1323api_cede (void) 1671api_cede_notself (pTHX)
1324{ 1672{
1325 dTHX; 1673 if (coro_nready)
1674 {
1326 struct transfer_args ta; 1675 struct coro_transfer_args ta;
1327 1676
1328 prepare_cede (aTHX_ &ta); 1677 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 1678 TRANSFER (ta, 1);
1333 return 1; 1679 return 1;
1334 } 1680 }
1335 else 1681 else
1336 return 0; 1682 return 0;
1337} 1683}
1338 1684
1339static int 1685static 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) 1686api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 1687{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 1688 struct coro *coro = SvSTATE (coro_sv);
1359 1689
1360 if (flags & CC_TRACE) 1690 if (flags & CC_TRACE)
1361 { 1691 {
1362 if (!coro->cctx) 1692 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 1693 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 1694 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 1695 croak ("cannot enable tracing on coroutine with custom stack,");
1366 1696
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 1698 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 1700 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 1702
1373 if (coro->flags & CF_RUNNING) 1703 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 1704 PL_runops = RUNOPS_DEFAULT;
1375 else 1705 else
1376 coro->runops = RUNOPS_DEFAULT; 1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1377 } 1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1378} 1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1942}
1943
1944static SV *
1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1946{
1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1948
1949 return newSVnv (self->every);
1950}
1951
1952static IV
1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
1959 {
1960 api_cede (aTHX);
1961 self->next = now + self->every;
1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore & Coro::Signal */
2001
2002static SV *
2003coro_waitarray_new (pTHX_ int count)
2004{
2005 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2006 AV *av = newAV ();
2007 SV **ary;
2008
2009 /* unfortunately, building manually saves memory */
2010 Newx (ary, 2, SV *);
2011 AvALLOC (av) = ary;
2012 AvARRAY (av) = ary;
2013 AvMAX (av) = 1;
2014 AvFILLp (av) = 0;
2015 ary [0] = newSViv (count);
2016
2017 return newRV_noinc ((SV *)av);
2018}
2019
2020/* semaphore */
2021
2022static void
2023coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2024{
2025 SV *count_sv = AvARRAY (av)[0];
2026 IV count = SvIVX (count_sv);
2027
2028 count += adjust;
2029 SvIVX (count_sv) = count;
2030
2031 /* now wake up as many waiters as are expected to lock */
2032 while (count > 0 && AvFILLp (av) > 0)
2033 {
2034 SV *cb;
2035
2036 /* swap first two elements so we can shift a waiter */
2037 AvARRAY (av)[0] = AvARRAY (av)[1];
2038 AvARRAY (av)[1] = count_sv;
2039 cb = av_shift (av);
2040
2041 if (SvOBJECT (cb))
2042 api_ready (aTHX_ cb);
2043 else
2044 croak ("callbacks not yet supported");
2045
2046 SvREFCNT_dec (cb);
2047
2048 --count;
2049 }
2050}
2051
2052static void
2053coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2054{
2055 /* call $sem->adjust (0) to possibly wake up some other waiters */
2056 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2057}
2058
2059static int
2060slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2061{
2062 AV *av = (AV *)frame->data;
2063 SV *count_sv = AvARRAY (av)[0];
2064
2065 /* if we are about to throw, don't actually acquire the lock, just throw */
2066 if (CORO_THROW)
2067 return 0;
2068 else if (SvIVX (count_sv) > 0)
2069 {
2070 SvSTATE_current->on_destroy = 0;
2071
2072 if (acquire)
2073 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2074 else
2075 coro_semaphore_adjust (aTHX_ av, 0);
2076
2077 return 0;
2078 }
2079 else
2080 {
2081 int i;
2082 /* if we were woken up but can't down, we look through the whole */
2083 /* waiters list and only add us if we aren't in there already */
2084 /* this avoids some degenerate memory usage cases */
2085
2086 for (i = 1; i <= AvFILLp (av); ++i)
2087 if (AvARRAY (av)[i] == SvRV (coro_current))
2088 return 1;
2089
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091 return 1;
2092 }
2093}
2094
2095static int
2096slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2097{
2098 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2099}
2100
2101static int
2102slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2103{
2104 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2105}
2106
2107static void
2108slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2109{
2110 AV *av = (AV *)SvRV (arg [0]);
2111
2112 if (SvIVX (AvARRAY (av)[0]) > 0)
2113 {
2114 frame->data = (void *)av;
2115 frame->prepare = prepare_nop;
2116 }
2117 else
2118 {
2119 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2120
2121 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2122 frame->prepare = prepare_schedule;
2123
2124 /* to avoid race conditions when a woken-up coro gets terminated */
2125 /* we arrange for a temporary on_destroy that calls adjust (0) */
2126 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2127 }
2128}
2129
2130static void
2131slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2132{
2133 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2134 frame->check = slf_check_semaphore_down;
2135}
2136
2137static void
2138slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2139{
2140 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2141 frame->check = slf_check_semaphore_wait;
2142}
2143
2144/* signal */
2145
2146static void
2147coro_signal_wake (pTHX_ AV *av, int count)
2148{
2149 SvIVX (AvARRAY (av)[0]) = 0;
2150
2151 /* now signal count waiters */
2152 while (count > 0 && AvFILLp (av) > 0)
2153 {
2154 SV *cb;
2155
2156 /* swap first two elements so we can shift a waiter */
2157 cb = AvARRAY (av)[0];
2158 AvARRAY (av)[0] = AvARRAY (av)[1];
2159 AvARRAY (av)[1] = cb;
2160
2161 cb = av_shift (av);
2162
2163 api_ready (aTHX_ cb);
2164 sv_setiv (cb, 0); /* signal waiter */
2165 SvREFCNT_dec (cb);
2166
2167 --count;
2168 }
2169}
2170
2171static int
2172slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2173{
2174 /* if we are about to throw, also stop waiting */
2175 return SvROK ((SV *)frame->data) && !CORO_THROW;
2176}
2177
2178static void
2179slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2180{
2181 AV *av = (AV *)SvRV (arg [0]);
2182
2183 if (SvIVX (AvARRAY (av)[0]))
2184 {
2185 SvIVX (AvARRAY (av)[0]) = 0;
2186 frame->prepare = prepare_nop;
2187 frame->check = slf_check_nop;
2188 }
2189 else
2190 {
2191 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2192
2193 av_push (av, waiter);
2194
2195 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2196 frame->prepare = prepare_schedule;
2197 frame->check = slf_check_signal_wait;
2198 }
2199}
2200
2201/*****************************************************************************/
2202/* gensub: simple closure generation utility */
2203
2204#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2205
2206/* create a closure from XS, returns a code reference */
2207/* the arg can be accessed via GENSUB_ARG from the callback */
2208/* the callback must use dXSARGS/XSRETURN */
2209static SV *
2210gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2211{
2212 CV *cv = (CV *)newSV (0);
2213
2214 sv_upgrade ((SV *)cv, SVt_PVCV);
2215
2216 CvANON_on (cv);
2217 CvISXSUB_on (cv);
2218 CvXSUB (cv) = xsub;
2219 GENSUB_ARG = arg;
2220
2221 return newRV_noinc ((SV *)cv);
2222}
2223
2224/*****************************************************************************/
2225/* Coro::AIO */
2226
2227#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2228
2229/* helper storage struct */
2230struct io_state
2231{
2232 int errorno;
2233 I32 laststype; /* U16 in 5.10.0 */
2234 int laststatval;
2235 Stat_t statcache;
2236};
2237
2238static void
2239coro_aio_callback (pTHX_ CV *cv)
2240{
2241 dXSARGS;
2242 AV *state = (AV *)GENSUB_ARG;
2243 SV *coro = av_pop (state);
2244 SV *data_sv = newSV (sizeof (struct io_state));
2245
2246 av_extend (state, items);
2247
2248 sv_upgrade (data_sv, SVt_PV);
2249 SvCUR_set (data_sv, sizeof (struct io_state));
2250 SvPOK_only (data_sv);
2251
2252 {
2253 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2254
2255 data->errorno = errno;
2256 data->laststype = PL_laststype;
2257 data->laststatval = PL_laststatval;
2258 data->statcache = PL_statcache;
2259 }
2260
2261 /* now build the result vector out of all the parameters and the data_sv */
2262 {
2263 int i;
2264
2265 for (i = 0; i < items; ++i)
2266 av_push (state, SvREFCNT_inc_NN (ST (i)));
2267 }
2268
2269 av_push (state, data_sv);
2270
2271 api_ready (aTHX_ coro);
2272 SvREFCNT_dec (coro);
2273 SvREFCNT_dec ((AV *)state);
2274}
2275
2276static int
2277slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2278{
2279 AV *state = (AV *)frame->data;
2280
2281 /* if we are about to throw, return early */
2282 /* this does not cancel the aio request, but at least */
2283 /* it quickly returns */
2284 if (CORO_THROW)
2285 return 0;
2286
2287 /* one element that is an RV? repeat! */
2288 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2289 return 1;
2290
2291 /* restore status */
2292 {
2293 SV *data_sv = av_pop (state);
2294 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2295
2296 errno = data->errorno;
2297 PL_laststype = data->laststype;
2298 PL_laststatval = data->laststatval;
2299 PL_statcache = data->statcache;
2300
2301 SvREFCNT_dec (data_sv);
2302 }
2303
2304 /* push result values */
2305 {
2306 dSP;
2307 int i;
2308
2309 EXTEND (SP, AvFILLp (state) + 1);
2310 for (i = 0; i <= AvFILLp (state); ++i)
2311 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2312
2313 PUTBACK;
2314 }
2315
2316 return 0;
2317}
2318
2319static void
2320slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2321{
2322 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2323 SV *coro_hv = SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv (coro_hv);
2325
2326 /* put our coroutine id on the state arg */
2327 av_push (state, SvREFCNT_inc_NN (coro_hv));
2328
2329 /* first see whether we have a non-zero priority and set it as AIO prio */
2330 if (coro->prio)
2331 {
2332 dSP;
2333
2334 static SV *prio_cv;
2335 static SV *prio_sv;
2336
2337 if (expect_false (!prio_cv))
2338 {
2339 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2340 prio_sv = newSViv (0);
2341 }
2342
2343 PUSHMARK (SP);
2344 sv_setiv (prio_sv, coro->prio);
2345 XPUSHs (prio_sv);
2346
2347 PUTBACK;
2348 call_sv (prio_cv, G_VOID | G_DISCARD);
2349 }
2350
2351 /* now call the original request */
2352 {
2353 dSP;
2354 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2355 int i;
2356
2357 PUSHMARK (SP);
2358
2359 /* first push all args to the stack */
2360 EXTEND (SP, items + 1);
2361
2362 for (i = 0; i < items; ++i)
2363 PUSHs (arg [i]);
2364
2365 /* now push the callback closure */
2366 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2367
2368 /* now call the AIO function - we assume our request is uncancelable */
2369 PUTBACK;
2370 call_sv ((SV *)req, G_VOID | G_DISCARD);
2371 }
2372
2373 /* now that the requets is going, we loop toll we have a result */
2374 frame->data = (void *)state;
2375 frame->prepare = prepare_schedule;
2376 frame->check = slf_check_aio_req;
2377}
2378
2379static void
2380coro_aio_req_xs (pTHX_ CV *cv)
2381{
2382 dXSARGS;
2383
2384 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2385
2386 XSRETURN_EMPTY;
2387}
2388
2389/*****************************************************************************/
1379 2390
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2391MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 2392
1382PROTOTYPES: DISABLE 2393PROTOTYPES: DISABLE
1383 2394
1384BOOT: 2395BOOT:
1385{ 2396{
1386#ifdef USE_ITHREADS 2397#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 2398# if CORO_PTHREAD
2399 coro_thx = PERL_GET_CONTEXT;
2400# endif
1388#endif 2401#endif
1389 BOOT_PAGESIZE; 2402 BOOT_PAGESIZE;
1390 2403
1391 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2404 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1392 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2405 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2406
2407 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2408 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2409 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2410
2411 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2412 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2413 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 2414
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2415 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 2416
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2417 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2418 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1402 main_top_env = PL_top_env; 2423 main_top_env = PL_top_env;
1403 2424
1404 while (main_top_env->je_prev) 2425 while (main_top_env->je_prev)
1405 main_top_env = main_top_env->je_prev; 2426 main_top_env = main_top_env->je_prev;
1406 2427
2428 {
2429 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2430
2431 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2432 hv_store_ent (PL_custom_op_names, slf,
2433 newSVpv ("coro_slf", 0), 0);
2434
2435 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2436 hv_store_ent (PL_custom_op_descs, slf,
2437 newSVpv ("coro schedule like function", 0), 0);
2438 }
2439
1407 coroapi.ver = CORO_API_VERSION; 2440 coroapi.ver = CORO_API_VERSION;
2441 coroapi.rev = CORO_API_REVISION;
2442
1408 coroapi.transfer = api_transfer; 2443 coroapi.transfer = api_transfer;
2444
2445 coroapi.sv_state = SvSTATE_;
2446 coroapi.execute_slf = api_execute_slf;
2447 coroapi.prepare_nop = prepare_nop;
2448 coroapi.prepare_schedule = prepare_schedule;
2449 coroapi.prepare_cede = prepare_cede;
2450 coroapi.prepare_cede_notself = prepare_cede_notself;
2451
2452 {
2453 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2454
2455 if (!svp) croak ("Time::HiRes is required");
2456 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2457
2458 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2459 }
1409 2460
1410 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2461 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1411} 2462}
1412 2463
1413SV * 2464SV *
1414new (char *klass, ...) 2465new (char *klass, ...)
1415 CODE: 2466 CODE:
1416{ 2467{
1417 struct coro *coro; 2468 struct coro *coro;
2469 MAGIC *mg;
1418 HV *hv; 2470 HV *hv;
1419 int i; 2471 int i;
1420 2472
1421 Newz (0, coro, 1, struct coro); 2473 Newz (0, coro, 1, struct coro);
1422 coro->args = newAV (); 2474 coro->args = newAV ();
… …
1425 if (coro_first) coro_first->prev = coro; 2477 if (coro_first) coro_first->prev = coro;
1426 coro->next = coro_first; 2478 coro->next = coro_first;
1427 coro_first = coro; 2479 coro_first = coro;
1428 2480
1429 coro->hv = hv = newHV (); 2481 coro->hv = hv = newHV ();
1430 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2482 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2483 mg->mg_flags |= MGf_DUP;
1431 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2484 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1432 2485
1433 av_extend (coro->args, items - 1); 2486 av_extend (coro->args, items - 1);
1434
1435 for (i = 1; i < items; i++) 2487 for (i = 1; i < items; i++)
1436 av_push (coro->args, newSVsv (ST (i))); 2488 av_push (coro->args, newSVsv (ST (i)));
1437} 2489}
1438 OUTPUT: 2490 OUTPUT:
1439 RETVAL 2491 RETVAL
1440 2492
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 2493void
1445_set_stacklevel (...) 2494transfer (...)
1446 ALIAS: 2495 PROTOTYPE: $$
1447 Coro::State::transfer = 1 2496 CODE:
1448 Coro::schedule = 2 2497 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 2498
1491bool 2499bool
1492_destroy (SV *coro_sv) 2500_destroy (SV *coro_sv)
1493 CODE: 2501 CODE:
1494 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2502 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1495 OUTPUT: 2503 OUTPUT:
1496 RETVAL 2504 RETVAL
1497 2505
1498void 2506void
1499_exit (code) 2507_exit (int code)
1500 int code
1501 PROTOTYPE: $ 2508 PROTOTYPE: $
1502 CODE: 2509 CODE:
1503 _exit (code); 2510 _exit (code);
1504 2511
1505int 2512int
1506cctx_stacksize (int new_stacksize = 0) 2513cctx_stacksize (int new_stacksize = 0)
2514 PROTOTYPE: ;$
1507 CODE: 2515 CODE:
1508 RETVAL = coro_stacksize; 2516 RETVAL = cctx_stacksize;
1509 if (new_stacksize) 2517 if (new_stacksize)
2518 {
1510 coro_stacksize = new_stacksize; 2519 cctx_stacksize = new_stacksize;
2520 ++cctx_gen;
2521 }
1511 OUTPUT: 2522 OUTPUT:
1512 RETVAL 2523 RETVAL
1513 2524
1514int 2525int
2526cctx_max_idle (int max_idle = 0)
2527 PROTOTYPE: ;$
2528 CODE:
2529 RETVAL = cctx_max_idle;
2530 if (max_idle > 1)
2531 cctx_max_idle = max_idle;
2532 OUTPUT:
2533 RETVAL
2534
2535int
1515cctx_count () 2536cctx_count ()
2537 PROTOTYPE:
1516 CODE: 2538 CODE:
1517 RETVAL = cctx_count; 2539 RETVAL = cctx_count;
1518 OUTPUT: 2540 OUTPUT:
1519 RETVAL 2541 RETVAL
1520 2542
1521int 2543int
1522cctx_idle () 2544cctx_idle ()
2545 PROTOTYPE:
1523 CODE: 2546 CODE:
1524 RETVAL = cctx_idle; 2547 RETVAL = cctx_idle;
1525 OUTPUT: 2548 OUTPUT:
1526 RETVAL 2549 RETVAL
1527 2550
1528void 2551void
1529list () 2552list ()
2553 PROTOTYPE:
1530 PPCODE: 2554 PPCODE:
1531{ 2555{
1532 struct coro *coro; 2556 struct coro *coro;
1533 for (coro = coro_first; coro; coro = coro->next) 2557 for (coro = coro_first; coro; coro = coro->next)
1534 if (coro->hv) 2558 if (coro->hv)
… …
1539call (Coro::State coro, SV *coderef) 2563call (Coro::State coro, SV *coderef)
1540 ALIAS: 2564 ALIAS:
1541 eval = 1 2565 eval = 1
1542 CODE: 2566 CODE:
1543{ 2567{
1544 if (coro->mainstack) 2568 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1545 { 2569 {
1546 struct coro temp; 2570 struct coro temp;
1547 Zero (&temp, 1, struct coro);
1548 2571
1549 if (!(coro->flags & CF_RUNNING)) 2572 if (!(coro->flags & CF_RUNNING))
1550 { 2573 {
2574 PUTBACK;
1551 save_perl (aTHX_ &temp); 2575 save_perl (aTHX_ &temp);
1552 load_perl (aTHX_ coro); 2576 load_perl (aTHX_ coro);
1553 } 2577 }
1554 2578
1555 { 2579 {
1556 dSP; 2580 dSP;
1557 ENTER; 2581 ENTER;
1558 SAVETMPS; 2582 SAVETMPS;
2583 PUTBACK;
2584 PUSHSTACK;
1559 PUSHMARK (SP); 2585 PUSHMARK (SP);
1560 PUTBACK; 2586
1561 if (ix) 2587 if (ix)
1562 eval_sv (coderef, 0); 2588 eval_sv (coderef, 0);
1563 else 2589 else
1564 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2590 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2591
2592 POPSTACK;
1565 SPAGAIN; 2593 SPAGAIN;
1566 FREETMPS; 2594 FREETMPS;
1567 LEAVE; 2595 LEAVE;
1568 PUTBACK; 2596 PUTBACK;
1569 } 2597 }
1570 2598
1571 if (!(coro->flags & CF_RUNNING)) 2599 if (!(coro->flags & CF_RUNNING))
1572 { 2600 {
1573 save_perl (aTHX_ coro); 2601 save_perl (aTHX_ coro);
1574 load_perl (aTHX_ &temp); 2602 load_perl (aTHX_ &temp);
2603 SPAGAIN;
1575 } 2604 }
1576 } 2605 }
1577} 2606}
1578 2607
1579SV * 2608SV *
… …
1588 RETVAL = boolSV (coro->flags & ix); 2617 RETVAL = boolSV (coro->flags & ix);
1589 OUTPUT: 2618 OUTPUT:
1590 RETVAL 2619 RETVAL
1591 2620
1592void 2621void
2622throw (Coro::State self, SV *throw = &PL_sv_undef)
2623 PROTOTYPE: $;$
2624 CODE:
2625{
2626 struct coro *current = SvSTATE_current;
2627 SV **throwp = self == current ? &CORO_THROW : &self->except;
2628 SvREFCNT_dec (*throwp);
2629 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2630}
2631
2632void
1593api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2633api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2634 PROTOTYPE: $;$
2635 C_ARGS: aTHX_ coro, flags
1594 2636
1595SV * 2637SV *
1596has_stack (Coro::State coro) 2638has_cctx (Coro::State coro)
1597 PROTOTYPE: $ 2639 PROTOTYPE: $
1598 CODE: 2640 CODE:
1599 RETVAL = boolSV (!!coro->cctx); 2641 RETVAL = boolSV (!!coro->cctx);
1600 OUTPUT: 2642 OUTPUT:
1601 RETVAL 2643 RETVAL
… …
1606 CODE: 2648 CODE:
1607 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2649 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1608 OUTPUT: 2650 OUTPUT:
1609 RETVAL 2651 RETVAL
1610 2652
1611IV 2653UV
1612rss (Coro::State coro) 2654rss (Coro::State coro)
1613 PROTOTYPE: $ 2655 PROTOTYPE: $
1614 ALIAS: 2656 ALIAS:
1615 usecount = 1 2657 usecount = 1
1616 CODE: 2658 CODE:
… …
1620 case 1: RETVAL = coro->usecount; break; 2662 case 1: RETVAL = coro->usecount; break;
1621 } 2663 }
1622 OUTPUT: 2664 OUTPUT:
1623 RETVAL 2665 RETVAL
1624 2666
2667void
2668force_cctx ()
2669 PROTOTYPE:
2670 CODE:
2671 SvSTATE_current->cctx->idle_sp = 0;
2672
2673void
2674swap_defsv (Coro::State self)
2675 PROTOTYPE: $
2676 ALIAS:
2677 swap_defav = 1
2678 CODE:
2679 if (!self->slot)
2680 croak ("cannot swap state with coroutine that has no saved state,");
2681 else
2682 {
2683 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2684 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2685
2686 SV *tmp = *src; *src = *dst; *dst = tmp;
2687 }
2688
1625 2689
1626MODULE = Coro::State PACKAGE = Coro 2690MODULE = Coro::State PACKAGE = Coro
1627 2691
1628BOOT: 2692BOOT:
1629{ 2693{
1630 int i; 2694 int i;
1631 2695
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); 2696 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2697 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2698 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1635 2699
1636 coro_current = get_sv ("Coro::current", FALSE); 2700 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1637 SvREADONLY_on (coro_current); 2701 SvREADONLY_on (coro_current);
1638 2702
1639 coro_stash = gv_stashpv ("Coro", TRUE); 2703 coro_stash = gv_stashpv ("Coro", TRUE);
1640 2704
1641 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2705 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1642 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2706 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1643 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2707 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1644 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2708 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1647 2711
1648 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2712 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1649 coro_ready[i] = newAV (); 2713 coro_ready[i] = newAV ();
1650 2714
1651 { 2715 {
1652 SV *sv = perl_get_sv("Coro::API", 1); 2716 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1653 2717
1654 coroapi.schedule = api_schedule; 2718 coroapi.schedule = api_schedule;
1655 coroapi.cede = api_cede; 2719 coroapi.cede = api_cede;
1656 coroapi.cede_notself = api_cede_notself; 2720 coroapi.cede_notself = api_cede_notself;
1657 coroapi.ready = api_ready; 2721 coroapi.ready = api_ready;
1658 coroapi.is_ready = api_is_ready; 2722 coroapi.is_ready = api_is_ready;
1659 coroapi.nready = &coro_nready; 2723 coroapi.nready = coro_nready;
1660 coroapi.current = coro_current; 2724 coroapi.current = coro_current;
1661 2725
1662 GCoroAPI = &coroapi; 2726 /*GCoroAPI = &coroapi;*/
1663 sv_setiv (sv, (IV)&coroapi); 2727 sv_setiv (sv, (IV)&coroapi);
1664 SvREADONLY_on (sv); 2728 SvREADONLY_on (sv);
1665 } 2729 }
1666} 2730}
2731
2732void
2733schedule (...)
2734 CODE:
2735 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2736
2737void
2738cede (...)
2739 CODE:
2740 CORO_EXECUTE_SLF_XS (slf_init_cede);
2741
2742void
2743cede_notself (...)
2744 CODE:
2745 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1667 2746
1668void 2747void
1669_set_current (SV *current) 2748_set_current (SV *current)
1670 PROTOTYPE: $ 2749 PROTOTYPE: $
1671 CODE: 2750 CODE:
1672 SvREFCNT_dec (SvRV (coro_current)); 2751 SvREFCNT_dec (SvRV (coro_current));
1673 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2752 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2753
2754void
2755_set_readyhook (SV *hook)
2756 PROTOTYPE: $
2757 CODE:
2758 SvREFCNT_dec (coro_readyhook);
2759 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1674 2760
1675int 2761int
1676prio (Coro::State coro, int newprio = 0) 2762prio (Coro::State coro, int newprio = 0)
2763 PROTOTYPE: $;$
1677 ALIAS: 2764 ALIAS:
1678 nice = 1 2765 nice = 1
1679 CODE: 2766 CODE:
1680{ 2767{
1681 RETVAL = coro->prio; 2768 RETVAL = coro->prio;
… …
1696 2783
1697SV * 2784SV *
1698ready (SV *self) 2785ready (SV *self)
1699 PROTOTYPE: $ 2786 PROTOTYPE: $
1700 CODE: 2787 CODE:
1701 RETVAL = boolSV (api_ready (self)); 2788 RETVAL = boolSV (api_ready (aTHX_ self));
1702 OUTPUT: 2789 OUTPUT:
1703 RETVAL 2790 RETVAL
1704 2791
1705int 2792int
1706nready (...) 2793nready (...)
… …
1713# for async_pool speedup 2800# for async_pool speedup
1714void 2801void
1715_pool_1 (SV *cb) 2802_pool_1 (SV *cb)
1716 CODE: 2803 CODE:
1717{ 2804{
1718 struct coro *coro = SvSTATE (coro_current);
1719 HV *hv = (HV *)SvRV (coro_current); 2805 HV *hv = (HV *)SvRV (coro_current);
2806 struct coro *coro = SvSTATE_hv ((SV *)hv);
1720 AV *defav = GvAV (PL_defgv); 2807 AV *defav = GvAV (PL_defgv);
1721 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2808 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1722 AV *invoke_av; 2809 AV *invoke_av;
1723 int i, len; 2810 int i, len;
1724 2811
1725 if (!invoke) 2812 if (!invoke)
2813 {
2814 SV *old = PL_diehook;
2815 PL_diehook = 0;
2816 SvREFCNT_dec (old);
1726 croak ("\3terminate\2\n"); 2817 croak ("\3async_pool terminate\2\n");
2818 }
1727 2819
1728 SvREFCNT_dec (coro->saved_deffh); 2820 SvREFCNT_dec (coro->saved_deffh);
1729 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2821 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1730 2822
1731 hv_store (hv, "desc", sizeof ("desc") - 1, 2823 hv_store (hv, "desc", sizeof ("desc") - 1,
1732 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2824 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1733 2825
1734 invoke_av = (AV *)SvRV (invoke); 2826 invoke_av = (AV *)SvRV (invoke);
… …
1738 2830
1739 if (len > 0) 2831 if (len > 0)
1740 { 2832 {
1741 av_fill (defav, len - 1); 2833 av_fill (defav, len - 1);
1742 for (i = 0; i < len; ++i) 2834 for (i = 0; i < len; ++i)
1743 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2835 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1744 } 2836 }
1745
1746 SvREFCNT_dec (invoke);
1747} 2837}
1748 2838
1749void 2839void
1750_pool_2 (SV *cb) 2840_pool_2 (SV *cb)
1751 CODE: 2841 CODE:
1752{ 2842{
1753 struct coro *coro = SvSTATE (coro_current); 2843 HV *hv = (HV *)SvRV (coro_current);
2844 struct coro *coro = SvSTATE_hv ((SV *)hv);
1754 2845
1755 sv_setsv (cb, &PL_sv_undef); 2846 sv_setsv (cb, &PL_sv_undef);
1756 2847
1757 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2848 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1758 coro->saved_deffh = 0; 2849 coro->saved_deffh = 0;
1759 2850
1760 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2851 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1761 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2852 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2853 {
2854 SV *old = PL_diehook;
2855 PL_diehook = 0;
2856 SvREFCNT_dec (old);
1762 croak ("\3terminate\2\n"); 2857 croak ("\3async_pool terminate\2\n");
2858 }
1763 2859
1764 av_clear (GvAV (PL_defgv)); 2860 av_clear (GvAV (PL_defgv));
1765 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2861 hv_store (hv, "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2862 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1767 2863
1768 coro->prio = 0; 2864 coro->prio = 0;
1769 2865
1770 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2866 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1771 api_trace (coro_current, 0); 2867 api_trace (aTHX_ coro_current, 0);
1772 2868
1773 av_push (av_async_pool, newSVsv (coro_current)); 2869 av_push (av_async_pool, newSVsv (coro_current));
1774} 2870}
1775 2871
1776 2872
2873MODULE = Coro::State PACKAGE = PerlIO::cede
2874
2875BOOT:
2876 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2877
2878
1777MODULE = Coro::State PACKAGE = Coro::AIO 2879MODULE = Coro::State PACKAGE = Coro::Semaphore
1778 2880
1779SV * 2881SV *
1780_get_state () 2882new (SV *klass, SV *count = 0)
1781 CODE: 2883 CODE:
1782{ 2884 RETVAL = sv_bless (
1783 struct io_state *data; 2885 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
1784 2886 GvSTASH (CvGV (cv))
1785 RETVAL = newSV (sizeof (struct io_state)); 2887 );
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: 2888 OUTPUT:
1796 RETVAL 2889 RETVAL
1797 2890
2891# helper for Coro::Channel
2892SV *
2893_alloc (int count)
2894 CODE:
2895 RETVAL = coro_waitarray_new (aTHX_ count);
2896 OUTPUT:
2897 RETVAL
2898
2899SV *
2900count (SV *self)
2901 CODE:
2902 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2903 OUTPUT:
2904 RETVAL
2905
1798void 2906void
1799_set_state (char *data_) 2907up (SV *self, int adjust = 1)
1800 PROTOTYPE: $ 2908 ALIAS:
2909 adjust = 1
2910 CODE:
2911 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2912
2913void
2914down (SV *self)
2915 CODE:
2916 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2917
2918void
2919wait (SV *self)
2920 CODE:
2921 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2922
2923void
2924try (SV *self)
2925 PPCODE:
2926{
2927 AV *av = (AV *)SvRV (self);
2928 SV *count_sv = AvARRAY (av)[0];
2929 IV count = SvIVX (count_sv);
2930
2931 if (count > 0)
2932 {
2933 --count;
2934 SvIVX (count_sv) = count;
2935 XSRETURN_YES;
2936 }
2937 else
2938 XSRETURN_NO;
2939}
2940
2941void
2942waiters (SV *self)
2943 PPCODE:
2944{
2945 AV *av = (AV *)SvRV (self);
2946 int wcount = AvFILLp (av) + 1 - 1;
2947
2948 if (GIMME_V == G_SCALAR)
2949 XPUSHs (sv_2mortal (newSViv (wcount)));
2950 else
2951 {
2952 int i;
2953 EXTEND (SP, wcount);
2954 for (i = 1; i <= wcount; ++i)
2955 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2956 }
2957}
2958
2959MODULE = Coro::State PACKAGE = Coro::Signal
2960
2961SV *
2962new (SV *klass)
1801 CODE: 2963 CODE:
1802{ 2964 RETVAL = sv_bless (
1803 struct io_state *data = (void *)data_; 2965 coro_waitarray_new (aTHX_ 0),
2966 GvSTASH (CvGV (cv))
2967 );
2968 OUTPUT:
2969 RETVAL
1804 2970
1805 errno = data->errorno; 2971void
1806 PL_laststype = data->laststype; 2972wait (SV *self)
1807 PL_laststatval = data->laststatval; 2973 CODE:
1808 PL_statcache = data->statcache; 2974 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
1809}
1810 2975
2976void
2977broadcast (SV *self)
2978 CODE:
2979{
2980 AV *av = (AV *)SvRV (self);
2981 coro_signal_wake (aTHX_ av, AvFILLp (av));
2982}
2983
2984void
2985send (SV *self)
2986 CODE:
2987{
2988 AV *av = (AV *)SvRV (self);
2989
2990 if (AvFILLp (av))
2991 coro_signal_wake (aTHX_ av, 1);
2992 else
2993 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
2994}
2995
2996IV
2997awaited (SV *self)
2998 CODE:
2999 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3000 OUTPUT:
3001 RETVAL
3002
3003
3004MODULE = Coro::State PACKAGE = Coro::AnyEvent
3005
3006BOOT:
3007 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3008
3009void
3010_schedule (...)
3011 CODE:
3012{
3013 static int incede;
3014
3015 api_cede_notself (aTHX);
3016
3017 ++incede;
3018 while (coro_nready >= incede && api_cede (aTHX))
3019 ;
3020
3021 sv_setsv (sv_activity, &PL_sv_undef);
3022 if (coro_nready >= incede)
3023 {
3024 PUSHMARK (SP);
3025 PUTBACK;
3026 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3027 }
3028
3029 --incede;
3030}
3031
3032
3033MODULE = Coro::State PACKAGE = Coro::AIO
3034
3035void
3036_register (char *target, char *proto, SV *req)
3037 CODE:
3038{
3039 HV *st;
3040 GV *gvp;
3041 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3042 /* newXSproto doesn't return the CV on 5.8 */
3043 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3044 sv_setpv ((SV *)slf_cv, proto);
3045 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3046}
3047

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