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Comparing Coro/Coro/State.xs (file contents):
Revision 1.191 by root, Fri Oct 5 20:47:49 2007 UTC vs.
Revision 1.303 by root, Wed Nov 19 05:52:42 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
75/* 5.8.7 */ 104/* 5.8.7 */
76#ifndef SvRV_set 105#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 107#endif
79 108
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84#ifndef newSV
85# define newSV(l) NEWSV(0,l)
86#endif
87
88#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
89# undef CORO_STACKGUARD 110# undef CORO_STACKGUARD
90#endif 111#endif
91 112
92#ifndef CORO_STACKGUARD 113#ifndef CORO_STACKGUARD
… …
98# define CORO_PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
99#endif 120#endif
100 121
101/* The next macros try to return the current stack pointer, in an as 122/* The next macros try to return the current stack pointer, in an as
102 * portable way as possible. */ 123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
103#define dSTACKLEVEL volatile char stacklevel 128# define dSTACKLEVEL volatile void *stacklevel
104#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
105 131
106#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
107 133
108#if __GNUC__ >= 3 134#if __GNUC__ >= 3
109# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
110# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
111#else 138#else
112# define attribute(x) 139# define attribute(x)
113# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
114#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
115 146
116#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
117 148
118#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
119 151
120#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
121static perl_mutex coro_mutex; 153# if CORO_PTHREAD
122# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
123# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
124#else
125# define LOCK (void)0
126# define UNLOCK (void)0
127#endif 155# endif
156#endif
128 157
129/* helper storage struct for Coro::AIO */ 158static double (*nvtime)(); /* so why doesn't it take void? */
130struct io_state
131{
132 int errorno;
133 I32 laststype;
134 int laststatval;
135 Stat_t statcache;
136};
137 159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
138static size_t coro_stacksize = CORO_STACKSIZE; 165static size_t cctx_stacksize = CORO_STACKSIZE;
139static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
140static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
141static JMPENV *main_top_env; 168static JMPENV *main_top_env;
142static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
143static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
144 171
145static GV *irsgv; /* $/ */ 172static GV *irsgv; /* $/ */
146static GV *stdoutgv; /* *STDOUT */ 173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
147 177
148/* async_pool helper stuff */ 178/* async_pool helper stuff */
149static SV *sv_pool_rss; 179static SV *sv_pool_rss;
150static SV *sv_pool_size; 180static SV *sv_pool_size;
151static AV *av_async_pool; 181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
152 185
153static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
154static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
155 188
156enum { 189enum {
… …
161 CC_TRACE_LINE = 0x10, /* trace each statement */ 194 CC_TRACE_LINE = 0x10, /* trace each statement */
162 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
163}; 196};
164 197
165/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
166typedef struct coro_cctx { 199typedef struct coro_cctx
200{
167 struct coro_cctx *next; 201 struct coro_cctx *next;
168 202
169 /* the stack */ 203 /* the stack */
170 void *sptr; 204 void *sptr;
171 size_t ssize; 205 size_t ssize;
… …
174 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
175 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
176 JMPENV *top_env; 210 JMPENV *top_env;
177 coro_context cctx; 211 coro_context cctx;
178 212
213 U32 gen;
179#if CORO_USE_VALGRIND 214#if CORO_USE_VALGRIND
180 int valgrind_id; 215 int valgrind_id;
181#endif 216#endif
182 unsigned char flags; 217 unsigned char flags;
183} coro_cctx; 218} coro_cctx;
… …
187 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
188 CF_NEW = 0x0004, /* has never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
189 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
190}; 225};
191 226
192/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
193struct coro { 228typedef struct
194 /* the c coroutine allocated to this perl coroutine, if any */ 229{
195 coro_cctx *cctx; 230 SV *defsv;
196 231 AV *defav;
197 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
198 AV *args; 233 SV *irsgv;
199 int refcnt;
200 int flags; /* CF_ flags */
201
202 /* optionally saved, might be zero */
203 AV *defav; /* @_ */
204 SV *defsv; /* $_ */
205 SV *errsv; /* $@ */
206 SV *deffh; /* default filehandle */
207 SV *irssv; /* $/ */
208 SV *irssv_sv; /* real $/ cache */
209
210#define VAR(name,type) type name; 234#define VAR(name,type) type name;
211# include "state.h" 235# include "state.h"
212#undef VAR 236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
242struct coro {
243 /* the C coroutine allocated to this perl coroutine, if any */
244 coro_cctx *cctx;
245
246 /* state data */
247 struct CoroSLF slf_frame; /* saved slf frame */
248 AV *mainstack;
249 perl_slots *slot; /* basically the saved sp */
250
251 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 */
263 SV *rouse_cb;
220 264
221 /* async_pool */ 265 /* async_pool */
222 SV *saved_deffh; 266 SV *saved_deffh;
223 267
224 /* linked list */ 268 /* linked list */
225 struct coro *next, *prev; 269 struct coro *next, *prev;
226 HV *hv; /* the perl hash associated with this coro, if any */
227}; 270};
228 271
229typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
230typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the mainr easonw e don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
231 279
232/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
233 281
234#define PRIO_MAX 3 282#define PRIO_MAX 3
235#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
238#define PRIO_IDLE -3 286#define PRIO_IDLE -3
239#define PRIO_MIN -4 287#define PRIO_MIN -4
240 288
241/* for Coro.pm */ 289/* for Coro.pm */
242static SV *coro_current; 290static SV *coro_current;
291static SV *coro_readyhook;
243static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
244static int coro_nready;
245static struct coro *coro_first; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
246 295
247/** lowlevel stuff **********************************************************/ 296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
248 327
249static AV * 328static AV *
250coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
251{ 330{
252 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
253 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
254 333
255 newpadlist = newAV (); 334 newpadlist = newAV ();
256 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
257#if PERL_VERSION_ATLEAST (5,9,0) 336#if PERL_VERSION_ATLEAST (5,10,0)
258 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
259#else 338#else
260 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
261#endif 340#endif
262 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
263 --AvFILLp (padlist); 342 --AvFILLp (padlist);
264 343
265 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
266 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
267 346
268 return newpadlist; 347 return newpadlist;
269} 348}
270 349
… …
300 379
301 /* casting is fun. */ 380 /* casting is fun. */
302 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
303 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
304 383
305 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
306 385
307 return 0; 386 return 0;
308} 387}
309 388
389#define CORO_MAGIC_type_cv 26
310#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
311 391
312static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
313 396
314#define CORO_MAGIC(cv) \ 397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
315 SvMAGIC (cv) \ 399 ? SvMAGIC (sv) \
316 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 400 : mg_find (sv, type))
317 ? SvMAGIC (cv) \ 401
318 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
319 : 0 405 : 0)
320 406
321static struct coro * 407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
322SvSTATE_ (pTHX_ SV *coro) 411SvSTATE_ (pTHX_ SV *coro)
323{ 412{
324 HV *stash; 413 HV *stash;
325 MAGIC *mg; 414 MAGIC *mg;
326 415
327 if (SvROK (coro)) 416 if (SvROK (coro))
328 coro = SvRV (coro); 417 coro = SvRV (coro);
329 418
330 if (SvTYPE (coro) != SVt_PVHV) 419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
331 croak ("Coro::State object required"); 420 croak ("Coro::State object required");
332 421
333 stash = SvSTASH (coro); 422 stash = SvSTASH (coro);
334 if (stash != coro_stash && stash != coro_state_stash) 423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
335 { 424 {
336 /* very slow, but rare, check */ 425 /* very slow, but rare, check */
337 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
338 croak ("Coro::State object required"); 427 croak ("Coro::State object required");
339 } 428 }
340 429
341 mg = CORO_MAGIC (coro); 430 mg = CORO_MAGIC_state (coro);
342 return (struct coro *)mg->mg_ptr; 431 return (struct coro *)mg->mg_ptr;
343} 432}
344 433
345#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
346 435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
439
347/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
348static void 441static void
349get_padlist (pTHX_ CV *cv) 442get_padlist (pTHX_ CV *cv)
350{ 443{
351 MAGIC *mg = CORO_MAGIC (cv); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
352 AV *av; 445 AV *av;
353 446
354 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
355 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
356 else 449 else
357 { 450 {
358#if CORO_PREFER_PERL_FUNCTIONS 451#if CORO_PREFER_PERL_FUNCTIONS
359 /* this is probably cleaner, but also slower? */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
360 CV *cp = Perl_cv_clone (cv); 454 CV *cp = Perl_cv_clone (cv);
361 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
362 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
363 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
364#else 458#else
… …
368} 462}
369 463
370static void 464static void
371put_padlist (pTHX_ CV *cv) 465put_padlist (pTHX_ CV *cv)
372{ 466{
373 MAGIC *mg = CORO_MAGIC (cv); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
374 AV *av; 468 AV *av;
375 469
376 if (!mg) 470 if (expect_false (!mg))
377 { 471 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 }
383 472
384 av = (AV *)mg->mg_obj; 473 av = (AV *)mg->mg_obj;
385 474
386 if (AvFILLp (av) >= AvMAX (av)) 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
387 av_extend (av, AvMAX (av) + 1); 476 av_extend (av, AvMAX (av) + 1);
388 477
389 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
390} 479}
391 480
392/** load & save, init *******************************************************/ 481/** load & save, init *******************************************************/
393 482
394static void 483static void
395load_perl (pTHX_ Coro__State c) 484load_perl (pTHX_ Coro__State c)
396{ 485{
486 perl_slots *slot = c->slot;
487 c->slot = 0;
488
489 PL_mainstack = c->mainstack;
490
491 GvSV (PL_defgv) = slot->defsv;
492 GvAV (PL_defgv) = slot->defav;
493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
397#define VAR(name,type) PL_ ## name = c->name; 496 #define VAR(name,type) PL_ ## name = slot->name;
398# include "state.h" 497 # include "state.h"
399#undef VAR 498 #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;
405 499
406 { 500 {
407 dSP; 501 dSP;
502
408 CV *cv; 503 CV *cv;
409 504
410 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
412 { 507 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 509 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 510 CvPADLIST (cv) = (AV *)POPs;
416 } 511 }
417 512
418 PUTBACK; 513 PUTBACK;
419 } 514 }
515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
420} 518}
421 519
422static void 520static void
423save_perl (pTHX_ Coro__State c) 521save_perl (pTHX_ Coro__State c)
424{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
425 { 526 {
426 dSP; 527 dSP;
427 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
435 536
436 XPUSHs (Nullsv); 537 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
438 for (;;) 539 for (;;)
439 { 540 {
440 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
441 { 542 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
443 544
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
445 { 546 {
446 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
447 548
448 if (CvDEPTH (cv)) 549 if (expect_true (CvDEPTH (cv)))
449 { 550 {
450 EXTEND (SP, 3); 551 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
454 555
455 CvDEPTH (cv) = 0; 556 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 557 get_padlist (aTHX_ cv);
457 } 558 }
458 } 559 }
459 } 560 }
460 561
461 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 563 break;
463 564
464 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
467 } 568 }
468 569
469 PUTBACK; 570 PUTBACK;
470 } 571 }
471 572
573 /* allocate some space on the context stack for our purposes */
574 /* we manually unroll here, as usually 2 slots is enough */
575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
472 c->defav = GvAV (PL_defgv); 590 slot->defav = GvAV (PL_defgv);
473 c->defsv = DEFSV; 591 slot->defsv = DEFSV;
474 c->errsv = ERRSV; 592 slot->errsv = ERRSV;
475 c->irssv_sv = GvSV (irsgv); 593 slot->irsgv = GvSV (irsgv);
476 594
477#define VAR(name,type)c->name = PL_ ## name; 595 #define VAR(name,type) slot->name = PL_ ## name;
478# include "state.h" 596 # include "state.h"
479#undef VAR 597 #undef VAR
598 }
480} 599}
481 600
482/* 601/*
483 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
484 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
485 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
486 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
487 */ 606 */
488#if CORO_PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
489# define coro_init_stacks init_stacks 608# define coro_init_stacks init_stacks
490#else 609#else
491static void 610static void
492coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
493{ 612{
494 PL_curstackinfo = new_stackinfo(64, 6); 613 PL_curstackinfo = new_stackinfo(32, 8);
495 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
496 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
498 617
499 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
500 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
502 621
503 New(50,PL_tmps_stack,64,SV*); 622 New(50,PL_tmps_stack,32,SV*);
504 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
505 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
506 PL_tmps_max = 64; 625 PL_tmps_max = 32;
507 626
508 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
509 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
510 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
511 630
512#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
513 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
514#endif 633#endif
515 634
516 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
517 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
518 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
519 638
520 New(54,PL_savestack,64,ANY); 639 New(54,PL_savestack,24,ANY);
521 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
522 PL_savestack_max = 64; 641 PL_savestack_max = 24;
523 642
524#if !PERL_VERSION_ATLEAST (5,9,0) 643#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,4,OP*); 644 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
527 PL_retstack_max = 4; 646 PL_retstack_max = 4;
528#endif 647#endif
529} 648}
… …
531 650
532/* 651/*
533 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
534 */ 653 */
535static void 654static void
536coro_destroy_stacks (pTHX) 655coro_destruct_stacks (pTHX)
537{ 656{
538 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
539 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
540 659
541 while (PL_curstackinfo) 660 while (PL_curstackinfo)
… …
552 671
553 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
554 Safefree (PL_markstack); 673 Safefree (PL_markstack);
555 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
556 Safefree (PL_savestack); 675 Safefree (PL_savestack);
557#if !PERL_VERSION_ATLEAST (5,9,0) 676#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree (PL_retstack); 677 Safefree (PL_retstack);
559#endif 678#endif
560} 679}
561 680
562static size_t 681static size_t
… …
564{ 683{
565 size_t rss = sizeof (*coro); 684 size_t rss = sizeof (*coro);
566 685
567 if (coro->mainstack) 686 if (coro->mainstack)
568 { 687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
569 if (coro->flags & CF_RUNNING) 691 if (coro->flags & CF_RUNNING)
570 { 692 {
693 slot = &tmp_slot;
694
571 #define VAR(name,type)coro->name = PL_ ## name; 695 #define VAR(name,type) slot->name = PL_ ## name;
572 # include "state.h" 696 # include "state.h"
573 #undef VAR 697 #undef VAR
574 } 698 }
699 else
700 slot = coro->slot;
575 701
702 if (slot)
703 {
576 rss += sizeof (coro->curstackinfo); 704 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); 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
579 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
580 rss += coro->tmps_max * sizeof (SV *); 707 rss += slot->tmps_max * sizeof (SV *);
581 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32); 708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
582 rss += coro->scopestack_max * sizeof (I32); 709 rss += slot->scopestack_max * sizeof (I32);
583 rss += coro->savestack_max * sizeof (ANY); 710 rss += slot->savestack_max * sizeof (ANY);
584 711
585#if !PERL_VERSION_ATLEAST (5,9,0) 712#if !PERL_VERSION_ATLEAST (5,10,0)
586 rss += coro->retstack_max * sizeof (OP *); 713 rss += slot->retstack_max * sizeof (OP *);
587#endif 714#endif
715 }
588 } 716 }
589 717
590 return rss; 718 return rss;
591} 719}
592 720
593/** coroutine stack handling ************************************************/ 721/** coroutine stack handling ************************************************/
594 722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
595static void 743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
596coro_setup (pTHX_ struct coro *coro) 829coro_setup (pTHX_ struct coro *coro)
597{ 830{
598 /* 831 /*
599 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
600 */ 833 */
… …
603 PL_runops = RUNOPS_DEFAULT; 836 PL_runops = RUNOPS_DEFAULT;
604 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
605 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
606 PL_comppad = 0; 839 PL_comppad = 0;
607 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
608 PL_localizing = 0; 842 PL_localizing = 0;
609 PL_dirty = 0; 843 PL_dirty = 0;
610 PL_restartop = 0; 844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
611 852
612 GvSV (PL_defgv) = newSV (0); 853 GvSV (PL_defgv) = newSV (0);
613 GvAV (PL_defgv) = coro->args; coro->args = 0; 854 GvAV (PL_defgv) = coro->args; coro->args = 0;
614 GvSV (PL_errgv) = newSV (0); 855 GvSV (PL_errgv) = newSV (0);
615 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
616 PL_rs = newSVsv (GvSV (irsgv)); 857 PL_rs = newSVsv (GvSV (irsgv));
617 PL_defoutgv = SvREFCNT_inc (stdoutgv); 858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
618 859
619 { 860 {
620 dSP; 861 dSP;
621 LOGOP myop; 862 UNOP myop;
622 863
623 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
624 myop.op_next = Nullop; 865 myop.op_next = Nullop;
625 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
626 867
627 PUSHMARK (SP); 868 PUSHMARK (SP);
628 XPUSHs (av_shift (GvAV (PL_defgv))); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
629 PUTBACK; 870 PUTBACK;
630 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
631 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
632 SPAGAIN; 873 SPAGAIN;
633 } 874 }
634 875
635 ENTER; /* necessary e.g. for dounwind */ 876 /* this newly created coroutine might be run on an existing cctx which most
636} 877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
637 881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
638static void 894static void
639coro_destroy (pTHX_ struct coro *coro) 895coro_destruct (pTHX_ struct coro *coro)
640{ 896{
641 if (!IN_DESTRUCT) 897 if (!IN_DESTRUCT)
642 { 898 {
643 /* restore all saved variables and stuff */ 899 /* restore all saved variables and stuff */
644 LEAVE_SCOPE (0); 900 LEAVE_SCOPE (0);
… …
660 SvREFCNT_dec (GvSV (PL_errgv)); 916 SvREFCNT_dec (GvSV (PL_errgv));
661 SvREFCNT_dec (PL_defoutgv); 917 SvREFCNT_dec (PL_defoutgv);
662 SvREFCNT_dec (PL_rs); 918 SvREFCNT_dec (PL_rs);
663 SvREFCNT_dec (GvSV (irsgv)); 919 SvREFCNT_dec (GvSV (irsgv));
664 920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
665 SvREFCNT_dec (coro->saved_deffh); 925 SvREFCNT_dec (coro->saved_deffh);
666 //SvREFCNT_dec (coro->throw); 926 SvREFCNT_dec (coro->rouse_cb);
667 927
668 coro_destroy_stacks (aTHX); 928 coro_destruct_stacks (aTHX);
669} 929}
670 930
671static void 931INLINE void
672free_coro_mortal (pTHX) 932free_coro_mortal (pTHX)
673{ 933{
674 if (coro_mortal) 934 if (expect_true (coro_mortal))
675 { 935 {
676 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
677 coro_mortal = 0; 937 coro_mortal = 0;
678 } 938 }
679} 939}
… …
681static int 941static int
682runops_trace (pTHX) 942runops_trace (pTHX)
683{ 943{
684 COP *oldcop = 0; 944 COP *oldcop = 0;
685 int oldcxix = -2; 945 int oldcxix = -2;
686 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
687 coro_cctx *cctx = coro->cctx; 947 coro_cctx *cctx = coro->cctx;
688 948
689 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
690 { 950 {
691 PERL_ASYNC_CHECK (); 951 PERL_ASYNC_CHECK ();
… …
708 bot = PL_stack_base + cx->blk_oldsp + 1; 968 bot = PL_stack_base + cx->blk_oldsp + 1;
709 top = cx->blk_gimme == G_ARRAY ? SP + 1 969 top = cx->blk_gimme == G_ARRAY ? SP + 1
710 : cx->blk_gimme == G_SCALAR ? bot + 1 970 : cx->blk_gimme == G_SCALAR ? bot + 1
711 : bot; 971 : bot;
712 972
973 av_extend (av, top - bot);
713 while (bot < top) 974 while (bot < top)
714 av_push (av, SvREFCNT_inc (*bot++)); 975 av_push (av, SvREFCNT_inc_NN (*bot++));
715 976
716 PL_runops = RUNOPS_DEFAULT; 977 PL_runops = RUNOPS_DEFAULT;
717 ENTER; 978 ENTER;
718 SAVETMPS; 979 SAVETMPS;
719 EXTEND (SP, 3); 980 EXTEND (SP, 3);
… …
757 SAVETMPS; 1018 SAVETMPS;
758 EXTEND (SP, 3); 1019 EXTEND (SP, 3);
759 PUSHMARK (SP); 1020 PUSHMARK (SP);
760 PUSHs (&PL_sv_yes); 1021 PUSHs (&PL_sv_yes);
761 PUSHs (fullname); 1022 PUSHs (fullname);
762 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
763 PUTBACK; 1024 PUTBACK;
764 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1025 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); 1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
766 SPAGAIN; 1027 SPAGAIN;
767 FREETMPS; 1028 FREETMPS;
… …
799 1060
800 TAINT_NOT; 1061 TAINT_NOT;
801 return 0; 1062 return 0;
802} 1063}
803 1064
804/* inject a fake call to Coro::State::_cctx_init into the execution */ 1065static struct coro_cctx *cctx_ssl_cctx;
805/* _cctx_init should be careful, as it could be called at almost any time */ 1066static struct CoroSLF cctx_ssl_frame;
806/* during execution of a perl program */ 1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
807static void NOINLINE 1084static void NOINLINE
808prepare_cctx (pTHX_ coro_cctx *cctx) 1085cctx_prepare (pTHX_ coro_cctx *cctx)
809{ 1086{
810 dSP;
811 LOGOP myop;
812
813 PL_top_env = &PL_start_env; 1087 PL_top_env = &PL_start_env;
814 1088
815 if (cctx->flags & CC_TRACE) 1089 if (cctx->flags & CC_TRACE)
816 PL_runops = runops_trace; 1090 PL_runops = runops_trace;
817 1091
818 Zero (&myop, 1, LOGOP); 1092 /* we already must be executing an SLF op, there is no other valid way
819 myop.op_next = PL_op; 1093 * that can lead to creation of a new cctx */
820 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
821 1096
822 PUSHMARK (SP); 1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
823 EXTEND (SP, 2); 1098 cctx_ssl_cctx = cctx;
824 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1099 cctx_ssl_frame = slf_frame;
825 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1100
826 PUTBACK; 1101 slf_frame.prepare = slf_prepare_set_stacklevel;
827 PL_op = (OP *)&myop; 1102 slf_frame.check = slf_check_set_stacklevel;
828 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1103}
829 SPAGAIN; 1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
830} 1110}
831 1111
832/* 1112/*
833 * this is a _very_ stripped down perl interpreter ;) 1113 * this is a _very_ stripped down perl interpreter ;)
834 */ 1114 */
835static void 1115static void
836coro_run (void *arg) 1116cctx_run (void *arg)
837{ 1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
838 dTHX; 1124 dTHX;
839 1125
840 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1126 /* normally we would need to skip the entersub here */
841 UNLOCK; 1127 /* 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; 1128 /* PL_nop = PL_nop->op_next */
845 1129
846 /* inject a fake subroutine call to cctx_init */ 1130 /* inject a fake subroutine call to cctx_init */
847 prepare_cctx (aTHX_ (coro_cctx *)arg); 1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
848 1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
849 /* somebody or something will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
850 PL_restartop = PL_op; 1137 PL_restartop = PL_op;
851 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
852 1139
853 /* 1140 /*
854 * If perl-run returns we assume exit() was being called or the coro 1141 * 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) 1142 * 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 1143 * 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" 1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
858 * coroutine as Coro has no such concept 1145 * coroutine as Coro has no such concept
859 */ 1146 */
860 PL_top_env = main_top_env; 1147 PL_top_env = main_top_env;
861 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
862} 1150}
863 1151
864static coro_cctx * 1152static coro_cctx *
865cctx_new () 1153cctx_new ()
866{ 1154{
867 coro_cctx *cctx; 1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
868 void *stack_start; 1184 void *stack_start;
869 size_t stack_size; 1185 size_t stack_size;
870 1186
871 ++cctx_count;
872
873 Newz (0, cctx, 1, coro_cctx);
874
875#if HAVE_MMAP 1187#if HAVE_MMAP
876
877 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
878 /* mmap supposedly does allocate-on-write for us */ 1189 /* 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); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
880 1191
881 if (cctx->sptr != (void *)-1) 1192 if (cctx->sptr != (void *)-1)
882 { 1193 {
883# if CORO_STACKGUARD 1194 #if CORO_STACKGUARD
884 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
885# endif 1196 #endif
886 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
887 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
888 cctx->flags |= CC_MAPPED; 1199 cctx->flags |= CC_MAPPED;
889 } 1200 }
890 else 1201 else
891#endif 1202#endif
892 { 1203 {
893 cctx->ssize = coro_stacksize * (long)sizeof (long); 1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
894 New (0, cctx->sptr, coro_stacksize, long); 1205 New (0, cctx->sptr, cctx_stacksize, long);
895 1206
896 if (!cctx->sptr) 1207 if (!cctx->sptr)
897 { 1208 {
898 perror ("FATAL: unable to allocate stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
899 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
900 } 1211 }
901 1212
902 stack_start = cctx->sptr; 1213 stack_start = cctx->sptr;
903 stack_size = cctx->ssize; 1214 stack_size = cctx->ssize;
904 } 1215 }
905 1216
906 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
907 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
908 1222
909 return cctx; 1223 return cctx;
910} 1224}
911 1225
912static void 1226static void
… …
914{ 1228{
915 if (!cctx) 1229 if (!cctx)
916 return; 1230 return;
917 1231
918 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
919 1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
920#if CORO_USE_VALGRIND 1238 #if CORO_USE_VALGRIND
921 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
922#endif 1240 #endif
923 1241
924#if HAVE_MMAP 1242#if HAVE_MMAP
925 if (cctx->flags & CC_MAPPED) 1243 if (cctx->flags & CC_MAPPED)
926 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
927 else 1245 else
928#endif 1246#endif
929 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
1248 }
930 1249
931 Safefree (cctx); 1250 Safefree (cctx);
932} 1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
933 1255
934static coro_cctx * 1256static coro_cctx *
935cctx_get (pTHX) 1257cctx_get (pTHX)
936{ 1258{
937 while (cctx_first) 1259 while (expect_true (cctx_first))
938 { 1260 {
939 coro_cctx *cctx = cctx_first; 1261 coro_cctx *cctx = cctx_first;
940 cctx_first = cctx->next; 1262 cctx_first = cctx->next;
941 --cctx_idle; 1263 --cctx_idle;
942 1264
943 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1265 if (expect_true (!CCTX_EXPIRED (cctx)))
944 return cctx; 1266 return cctx;
945 1267
946 cctx_destroy (cctx); 1268 cctx_destroy (cctx);
947 } 1269 }
948 1270
949 return cctx_new (); 1271 return cctx_new_run ();
950} 1272}
951 1273
952static void 1274static void
953cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
954{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
955 /* free another cctx if overlimit */ 1279 /* free another cctx if overlimit */
956 if (cctx_idle >= MAX_IDLE_CCTX) 1280 if (expect_false (cctx_idle >= cctx_max_idle))
957 { 1281 {
958 coro_cctx *first = cctx_first; 1282 coro_cctx *first = cctx_first;
959 cctx_first = first->next; 1283 cctx_first = first->next;
960 --cctx_idle; 1284 --cctx_idle;
961 1285
… …
967 cctx_first = cctx; 1291 cctx_first = cctx;
968} 1292}
969 1293
970/** coroutine switching *****************************************************/ 1294/** coroutine switching *****************************************************/
971 1295
972static void NOINLINE 1296static void
973transfer_check (pTHX_ struct coro *prev, struct coro *next) 1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
974{ 1298{
975 if (prev != next) 1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
976 { 1302 {
977 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1303 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"); 1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
979 1305
980 if (next->flags & CF_RUNNING) 1306 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"); 1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
982 1308
983 if (next->flags & CF_DESTROYED) 1309 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"); 1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
985 1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
986 if (PL_lex_state != LEX_NOTPARSING) 1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
987 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
988 } 1316 }
989} 1317}
990 1318
991/* always use the TRANSFER macro */ 1319/* always use the TRANSFER macro */
992static void NOINLINE 1320static void NOINLINE /* noinline so we have a fixed stackframe */
993transfer (pTHX_ struct coro *prev, struct coro *next) 1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
994{ 1322{
995 dSTACKLEVEL; 1323 dSTACKLEVEL;
996 1324
997 /* sometimes transfer is only called to set idle_sp */ 1325 /* sometimes transfer is only called to set idle_sp */
998 if (!next) 1326 if (expect_false (!next))
999 { 1327 {
1000 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1328 ((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 */ 1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1002 } 1330 }
1003 else if (prev != next) 1331 else if (expect_true (prev != next))
1004 { 1332 {
1005 coro_cctx *prev__cctx; 1333 coro_cctx *prev__cctx;
1006 1334
1007 if (prev->flags & CF_NEW) 1335 if (expect_false (prev->flags & CF_NEW))
1008 { 1336 {
1009 /* create a new empty context */ 1337 /* create a new empty/source context */
1010 Newz (0, prev->cctx, 1, coro_cctx); 1338 prev->cctx = cctx_new_empty ();
1011 prev->flags &= ~CF_NEW; 1339 prev->flags &= ~CF_NEW;
1012 prev->flags |= CF_RUNNING; 1340 prev->flags |= CF_RUNNING;
1013 } 1341 }
1014 1342
1015 prev->flags &= ~CF_RUNNING; 1343 prev->flags &= ~CF_RUNNING;
1016 next->flags |= CF_RUNNING; 1344 next->flags |= CF_RUNNING;
1017 1345
1018 LOCK; 1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1019 1348
1020 if (next->flags & CF_NEW) 1349 if (expect_false (next->flags & CF_NEW))
1021 { 1350 {
1022 /* need to start coroutine */ 1351 /* need to start coroutine */
1023 next->flags &= ~CF_NEW; 1352 next->flags &= ~CF_NEW;
1024 /* first get rid of the old state */
1025 save_perl (aTHX_ prev);
1026 /* setup coroutine call */ 1353 /* setup coroutine call */
1027 coro_setup (aTHX_ next); 1354 coro_setup (aTHX_ next);
1028 } 1355 }
1029 else 1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
1030 { 1367 {
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 */ 1368 /* 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)); 1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1043 1370
1044 prev->cctx = 0; 1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1045 1378
1046 cctx_put (prev__cctx); 1379 cctx_put (prev__cctx);
1047 } 1380 }
1048 1381
1049 ++next->usecount; 1382 ++next->usecount;
1050 1383
1051 if (!next->cctx) 1384 if (expect_true (!next->cctx))
1052 next->cctx = cctx_get (aTHX); 1385 next->cctx = cctx_get (aTHX);
1053 1386
1054 if (prev__cctx != next->cctx) 1387 if (expect_false (prev__cctx != next->cctx))
1055 { 1388 {
1056 prev__cctx->top_env = PL_top_env; 1389 prev__cctx->top_env = PL_top_env;
1057 PL_top_env = next->cctx->top_env; 1390 PL_top_env = next->cctx->top_env;
1058 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1059 } 1392 }
1060 1393
1061 free_coro_mortal (aTHX); 1394 transfer_tail (aTHX);
1062 UNLOCK;
1063 } 1395 }
1064} 1396}
1065 1397
1066struct transfer_args
1067{
1068 struct coro *prev, *next;
1069};
1070
1071#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1398#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) 1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1073 1400
1074/** high level stuff ********************************************************/ 1401/** high level stuff ********************************************************/
1075 1402
1076static int 1403static int
1077coro_state_destroy (pTHX_ struct coro *coro) 1404coro_state_destroy (pTHX_ struct coro *coro)
1078{ 1405{
1079 if (coro->flags & CF_DESTROYED) 1406 if (coro->flags & CF_DESTROYED)
1080 return 0; 1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1081 1411
1082 coro->flags |= CF_DESTROYED; 1412 coro->flags |= CF_DESTROYED;
1083 1413
1084 if (coro->flags & CF_READY) 1414 if (coro->flags & CF_READY)
1085 { 1415 {
1086 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1087 /* alternative: look through all ready queues and remove the coro */ 1417 /* alternative: look through all ready queues and remove the coro */
1088 LOCK;
1089 --coro_nready; 1418 --coro_nready;
1090 UNLOCK;
1091 } 1419 }
1092 else 1420 else
1093 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1094 1422
1095 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
1096 { 1424 {
1097 struct coro temp; 1425 struct coro temp;
1098 1426
1099 if (coro->flags & CF_RUNNING) 1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1100 croak ("FATAL: tried to destroy currently running coroutine");
1101 1428
1102 save_perl (aTHX_ &temp); 1429 save_perl (aTHX_ &temp);
1103 load_perl (aTHX_ coro); 1430 load_perl (aTHX_ coro);
1104 1431
1105 coro_destroy (aTHX_ coro); 1432 coro_destruct (aTHX_ coro);
1106 1433
1107 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1434 load_perl (aTHX_ &temp);
1108 1435
1109 coro->mainstack = 0; 1436 coro->slot = 0;
1110 } 1437 }
1111 1438
1112 cctx_destroy (coro->cctx); 1439 cctx_destroy (coro->cctx);
1113 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
1114 1441
… …
1156# define MGf_DUP 0 1483# define MGf_DUP 0
1157#endif 1484#endif
1158}; 1485};
1159 1486
1160static void 1487static void
1161prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1162{ 1489{
1163 ta->prev = SvSTATE (prev_sv); 1490 ta->prev = SvSTATE (prev_sv);
1164 ta->next = SvSTATE (next_sv); 1491 ta->next = SvSTATE (next_sv);
1165 TRANSFER_CHECK (*ta); 1492 TRANSFER_CHECK (*ta);
1166} 1493}
1167 1494
1168static void 1495static void
1169api_transfer (SV *prev_sv, SV *next_sv) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1170{ 1497{
1171 dTHX;
1172 struct transfer_args ta; 1498 struct coro_transfer_args ta;
1173 1499
1174 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1175 TRANSFER (ta); 1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
1176} 1525}
1177 1526
1178/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
1179 1528
1180static void 1529INLINE void
1181coro_enq (pTHX_ SV *coro_sv) 1530coro_enq (pTHX_ struct coro *coro)
1182{ 1531{
1183 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1184} 1533}
1185 1534
1186static SV * 1535INLINE SV *
1187coro_deq (pTHX_ int min_prio) 1536coro_deq (pTHX)
1188{ 1537{
1189 int prio = PRIO_MAX - PRIO_MIN; 1538 int prio;
1190 1539
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; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1196 if (AvFILLp (coro_ready [prio]) >= 0) 1541 if (AvFILLp (coro_ready [prio]) >= 0)
1197 return av_shift (coro_ready [prio]); 1542 return av_shift (coro_ready [prio]);
1198 1543
1199 return 0; 1544 return 0;
1200} 1545}
1201 1546
1202static int 1547static int
1203api_ready (SV *coro_sv) 1548api_ready (pTHX_ SV *coro_sv)
1204{ 1549{
1205 dTHX;
1206 struct coro *coro; 1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
1207 1553
1208 if (SvROK (coro_sv)) 1554 if (SvROK (coro_sv))
1209 coro_sv = SvRV (coro_sv); 1555 coro_sv = SvRV (coro_sv);
1210 1556
1211 coro = SvSTATE (coro_sv); 1557 coro = SvSTATE (coro_sv);
… …
1213 if (coro->flags & CF_READY) 1559 if (coro->flags & CF_READY)
1214 return 0; 1560 return 0;
1215 1561
1216 coro->flags |= CF_READY; 1562 coro->flags |= CF_READY;
1217 1563
1218 LOCK; 1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1219 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
1220 ++coro_nready; 1568 ++coro_nready;
1221 UNLOCK; 1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
1222 1587
1223 return 1; 1588 return 1;
1224} 1589}
1225 1590
1226static int 1591static int
1227api_is_ready (SV *coro_sv) 1592api_is_ready (pTHX_ SV *coro_sv)
1228{ 1593{
1229 dTHX;
1230 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1231} 1595}
1232 1596
1233static void 1597INLINE void
1234prepare_schedule (pTHX_ struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1235{ 1599{
1236 SV *prev_sv, *next_sv; 1600 SV *prev_sv, *next_sv;
1237 1601
1238 for (;;) 1602 for (;;)
1239 { 1603 {
1240 LOCK;
1241 next_sv = coro_deq (aTHX_ PRIO_MIN); 1604 next_sv = coro_deq (aTHX);
1242 1605
1243 /* nothing to schedule: call the idle handler */ 1606 /* nothing to schedule: call the idle handler */
1244 if (!next_sv) 1607 if (expect_false (!next_sv))
1245 { 1608 {
1246 dSP; 1609 dSP;
1247 UNLOCK;
1248 1610
1249 ENTER; 1611 ENTER;
1250 SAVETMPS; 1612 SAVETMPS;
1251 1613
1252 PUSHMARK (SP); 1614 PUSHMARK (SP);
1253 PUTBACK; 1615 PUTBACK;
1254 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1255 1617
1256 FREETMPS; 1618 FREETMPS;
1257 LEAVE; 1619 LEAVE;
1258 continue; 1620 continue;
1259 } 1621 }
1260 1622
1261 ta->next = SvSTATE (next_sv); 1623 ta->next = SvSTATE_hv (next_sv);
1262 1624
1263 /* cannot transfer to destroyed coros, skip and look for next */ 1625 /* cannot transfer to destroyed coros, skip and look for next */
1264 if (ta->next->flags & CF_DESTROYED) 1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1265 { 1627 {
1266 UNLOCK;
1267 SvREFCNT_dec (next_sv); 1628 SvREFCNT_dec (next_sv);
1268 /* coro_nready is already taken care of by destroy */ 1629 /* coro_nready has already been taken care of by destroy */
1269 continue; 1630 continue;
1270 } 1631 }
1271 1632
1272 --coro_nready; 1633 --coro_nready;
1273 UNLOCK;
1274 break; 1634 break;
1275 } 1635 }
1276 1636
1277 /* free this only after the transfer */ 1637 /* free this only after the transfer */
1278 prev_sv = SvRV (coro_current); 1638 prev_sv = SvRV (coro_current);
1279 ta->prev = SvSTATE (prev_sv); 1639 ta->prev = SvSTATE_hv (prev_sv);
1280 TRANSFER_CHECK (*ta); 1640 TRANSFER_CHECK (*ta);
1281 assert (ta->next->flags & CF_READY); 1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1282 ta->next->flags &= ~CF_READY; 1642 ta->next->flags &= ~CF_READY;
1283 SvRV_set (coro_current, next_sv); 1643 SvRV_set (coro_current, next_sv);
1284 1644
1285 LOCK;
1286 free_coro_mortal (aTHX); 1645 free_coro_mortal (aTHX);
1287 coro_mortal = prev_sv; 1646 coro_mortal = prev_sv;
1288 UNLOCK;
1289} 1647}
1290 1648
1291static void 1649INLINE void
1292prepare_cede (pTHX_ struct transfer_args *ta) 1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1293{ 1651{
1294 api_ready (coro_current); 1652 api_ready (aTHX_ coro_current);
1295 prepare_schedule (aTHX_ ta); 1653 prepare_schedule (aTHX_ ta);
1296} 1654}
1297 1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1298static int 1679static int
1299prepare_cede_notself (pTHX_ struct transfer_args *ta) 1680api_cede (pTHX)
1300{ 1681{
1301 if (coro_nready) 1682 struct coro_transfer_args ta;
1302 { 1683
1303 SV *prev = SvRV (coro_current);
1304 prepare_schedule (aTHX_ ta); 1684 prepare_cede (aTHX_ &ta);
1305 api_ready (prev); 1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1306 return 1; 1689 return 1;
1307 } 1690 }
1308 else 1691 else
1309 return 0; 1692 return 0;
1310} 1693}
1311 1694
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 1695static int
1323api_cede (void) 1696api_cede_notself (pTHX)
1324{ 1697{
1325 dTHX; 1698 if (coro_nready)
1699 {
1326 struct transfer_args ta; 1700 struct coro_transfer_args ta;
1327 1701
1328 prepare_cede (aTHX_ &ta); 1702 prepare_cede_notself (aTHX_ &ta);
1329
1330 if (ta.prev != ta.next)
1331 {
1332 TRANSFER (ta); 1703 TRANSFER (ta, 1);
1333 return 1; 1704 return 1;
1334 } 1705 }
1335 else 1706 else
1336 return 0; 1707 return 0;
1337} 1708}
1338 1709
1339static int 1710static 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) 1711api_trace (pTHX_ SV *coro_sv, int flags)
1356{ 1712{
1357 dTHX;
1358 struct coro *coro = SvSTATE (coro_sv); 1713 struct coro *coro = SvSTATE (coro_sv);
1359 1714
1360 if (flags & CC_TRACE) 1715 if (flags & CC_TRACE)
1361 { 1716 {
1362 if (!coro->cctx) 1717 if (!coro->cctx)
1363 coro->cctx = cctx_new (); 1718 coro->cctx = cctx_new_run ();
1364 else if (!(coro->cctx->flags & CC_TRACE)) 1719 else if (!(coro->cctx->flags & CC_TRACE))
1365 croak ("cannot enable tracing on coroutine with custom stack"); 1720 croak ("cannot enable tracing on coroutine with custom stack,");
1366 1721
1367 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1368 } 1723 }
1369 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1370 { 1725 {
1371 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1372 1727
1373 if (coro->flags & CF_RUNNING) 1728 if (coro->flags & CF_RUNNING)
1374 PL_runops = RUNOPS_DEFAULT; 1729 PL_runops = RUNOPS_DEFAULT;
1375 else 1730 else
1376 coro->runops = RUNOPS_DEFAULT; 1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1377 } 1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1378} 1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
1827}
1828
1829static SV *
1830coro_new_rouse_cb (pTHX)
1831{
1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1836
1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1838 SvREFCNT_dec (data); /* magicext increases the refcount */
1839
1840 SvREFCNT_dec (coro->rouse_cb);
1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
1946 {
1947 /* ampersand-form of call, use @_ instead of stack */
1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 AvARRAY (av) = ary;
2149 AvMAX (av) = 1;
2150 AvFILLp (av) = 0;
2151 ary [0] = newSViv (count);
2152
2153 return newRV_noinc ((SV *)av);
2154}
2155
2156/* semaphore */
2157
2158static void
2159coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2160{
2161 SV *count_sv = AvARRAY (av)[0];
2162 IV count = SvIVX (count_sv);
2163
2164 count += adjust;
2165 SvIVX (count_sv) = count;
2166
2167 /* now wake up as many waiters as are expected to lock */
2168 while (count > 0 && AvFILLp (av) > 0)
2169 {
2170 SV *cb;
2171
2172 /* swap first two elements so we can shift a waiter */
2173 AvARRAY (av)[0] = AvARRAY (av)[1];
2174 AvARRAY (av)[1] = count_sv;
2175 cb = av_shift (av);
2176
2177 if (SvOBJECT (cb))
2178 api_ready (aTHX_ cb);
2179 else
2180 croak ("callbacks not yet supported");
2181
2182 SvREFCNT_dec (cb);
2183
2184 --count;
2185 }
2186}
2187
2188static void
2189coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2190{
2191 /* call $sem->adjust (0) to possibly wake up some other waiters */
2192 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2193}
2194
2195static int
2196slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2197{
2198 AV *av = (AV *)frame->data;
2199 SV *count_sv = AvARRAY (av)[0];
2200
2201 /* if we are about to throw, don't actually acquire the lock, just throw */
2202 if (CORO_THROW)
2203 return 0;
2204 else if (SvIVX (count_sv) > 0)
2205 {
2206 SvSTATE_current->on_destroy = 0;
2207
2208 if (acquire)
2209 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2210 else
2211 coro_semaphore_adjust (aTHX_ av, 0);
2212
2213 return 0;
2214 }
2215 else
2216 {
2217 int i;
2218 /* if we were woken up but can't down, we look through the whole */
2219 /* waiters list and only add us if we aren't in there already */
2220 /* this avoids some degenerate memory usage cases */
2221
2222 for (i = 1; i <= AvFILLp (av); ++i)
2223 if (AvARRAY (av)[i] == SvRV (coro_current))
2224 return 1;
2225
2226 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2227 return 1;
2228 }
2229}
2230
2231static int
2232slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2235}
2236
2237static int
2238slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2239{
2240 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2241}
2242
2243static void
2244slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2245{
2246 AV *av = (AV *)SvRV (arg [0]);
2247
2248 if (SvIVX (AvARRAY (av)[0]) > 0)
2249 {
2250 frame->data = (void *)av;
2251 frame->prepare = prepare_nop;
2252 }
2253 else
2254 {
2255 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2256
2257 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2258 frame->prepare = prepare_schedule;
2259
2260 /* to avoid race conditions when a woken-up coro gets terminated */
2261 /* we arrange for a temporary on_destroy that calls adjust (0) */
2262 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2263 }
2264}
2265
2266static void
2267slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2268{
2269 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2270 frame->check = slf_check_semaphore_down;
2271}
2272
2273static void
2274slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2275{
2276 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2277 frame->check = slf_check_semaphore_wait;
2278}
2279
2280/* signal */
2281
2282static void
2283coro_signal_wake (pTHX_ AV *av, int count)
2284{
2285 SvIVX (AvARRAY (av)[0]) = 0;
2286
2287 /* now signal count waiters */
2288 while (count > 0 && AvFILLp (av) > 0)
2289 {
2290 SV *cb;
2291
2292 /* swap first two elements so we can shift a waiter */
2293 cb = AvARRAY (av)[0];
2294 AvARRAY (av)[0] = AvARRAY (av)[1];
2295 AvARRAY (av)[1] = cb;
2296
2297 cb = av_shift (av);
2298
2299 api_ready (aTHX_ cb);
2300 sv_setiv (cb, 0); /* signal waiter */
2301 SvREFCNT_dec (cb);
2302
2303 --count;
2304 }
2305}
2306
2307static int
2308slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2309{
2310 /* if we are about to throw, also stop waiting */
2311 return SvROK ((SV *)frame->data) && !CORO_THROW;
2312}
2313
2314static void
2315slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2316{
2317 AV *av = (AV *)SvRV (arg [0]);
2318
2319 if (SvIVX (AvARRAY (av)[0]))
2320 {
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322 frame->prepare = prepare_nop;
2323 frame->check = slf_check_nop;
2324 }
2325 else
2326 {
2327 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2328
2329 av_push (av, waiter);
2330
2331 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2332 frame->prepare = prepare_schedule;
2333 frame->check = slf_check_signal_wait;
2334 }
2335}
2336
2337/*****************************************************************************/
2338/* Coro::AIO */
2339
2340#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2341
2342/* helper storage struct */
2343struct io_state
2344{
2345 int errorno;
2346 I32 laststype; /* U16 in 5.10.0 */
2347 int laststatval;
2348 Stat_t statcache;
2349};
2350
2351static void
2352coro_aio_callback (pTHX_ CV *cv)
2353{
2354 dXSARGS;
2355 AV *state = (AV *)GENSUB_ARG;
2356 SV *coro = av_pop (state);
2357 SV *data_sv = newSV (sizeof (struct io_state));
2358
2359 av_extend (state, items);
2360
2361 sv_upgrade (data_sv, SVt_PV);
2362 SvCUR_set (data_sv, sizeof (struct io_state));
2363 SvPOK_only (data_sv);
2364
2365 {
2366 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2367
2368 data->errorno = errno;
2369 data->laststype = PL_laststype;
2370 data->laststatval = PL_laststatval;
2371 data->statcache = PL_statcache;
2372 }
2373
2374 /* now build the result vector out of all the parameters and the data_sv */
2375 {
2376 int i;
2377
2378 for (i = 0; i < items; ++i)
2379 av_push (state, SvREFCNT_inc_NN (ST (i)));
2380 }
2381
2382 av_push (state, data_sv);
2383
2384 api_ready (aTHX_ coro);
2385 SvREFCNT_dec (coro);
2386 SvREFCNT_dec ((AV *)state);
2387}
2388
2389static int
2390slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2391{
2392 AV *state = (AV *)frame->data;
2393
2394 /* if we are about to throw, return early */
2395 /* this does not cancel the aio request, but at least */
2396 /* it quickly returns */
2397 if (CORO_THROW)
2398 return 0;
2399
2400 /* one element that is an RV? repeat! */
2401 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2402 return 1;
2403
2404 /* restore status */
2405 {
2406 SV *data_sv = av_pop (state);
2407 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2408
2409 errno = data->errorno;
2410 PL_laststype = data->laststype;
2411 PL_laststatval = data->laststatval;
2412 PL_statcache = data->statcache;
2413
2414 SvREFCNT_dec (data_sv);
2415 }
2416
2417 /* push result values */
2418 {
2419 dSP;
2420 int i;
2421
2422 EXTEND (SP, AvFILLp (state) + 1);
2423 for (i = 0; i <= AvFILLp (state); ++i)
2424 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2425
2426 PUTBACK;
2427 }
2428
2429 return 0;
2430}
2431
2432static void
2433slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2434{
2435 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2436 SV *coro_hv = SvRV (coro_current);
2437 struct coro *coro = SvSTATE_hv (coro_hv);
2438
2439 /* put our coroutine id on the state arg */
2440 av_push (state, SvREFCNT_inc_NN (coro_hv));
2441
2442 /* first see whether we have a non-zero priority and set it as AIO prio */
2443 if (coro->prio)
2444 {
2445 dSP;
2446
2447 static SV *prio_cv;
2448 static SV *prio_sv;
2449
2450 if (expect_false (!prio_cv))
2451 {
2452 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2453 prio_sv = newSViv (0);
2454 }
2455
2456 PUSHMARK (SP);
2457 sv_setiv (prio_sv, coro->prio);
2458 XPUSHs (prio_sv);
2459
2460 PUTBACK;
2461 call_sv (prio_cv, G_VOID | G_DISCARD);
2462 }
2463
2464 /* now call the original request */
2465 {
2466 dSP;
2467 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2468 int i;
2469
2470 PUSHMARK (SP);
2471
2472 /* first push all args to the stack */
2473 EXTEND (SP, items + 1);
2474
2475 for (i = 0; i < items; ++i)
2476 PUSHs (arg [i]);
2477
2478 /* now push the callback closure */
2479 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2480
2481 /* now call the AIO function - we assume our request is uncancelable */
2482 PUTBACK;
2483 call_sv ((SV *)req, G_VOID | G_DISCARD);
2484 }
2485
2486 /* now that the requets is going, we loop toll we have a result */
2487 frame->data = (void *)state;
2488 frame->prepare = prepare_schedule;
2489 frame->check = slf_check_aio_req;
2490}
2491
2492static void
2493coro_aio_req_xs (pTHX_ CV *cv)
2494{
2495 dXSARGS;
2496
2497 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2498
2499 XSRETURN_EMPTY;
2500}
2501
2502/*****************************************************************************/
1379 2503
1380MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2504MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1381 2505
1382PROTOTYPES: DISABLE 2506PROTOTYPES: DISABLE
1383 2507
1384BOOT: 2508BOOT:
1385{ 2509{
1386#ifdef USE_ITHREADS 2510#ifdef USE_ITHREADS
1387 MUTEX_INIT (&coro_mutex); 2511# if CORO_PTHREAD
2512 coro_thx = PERL_GET_CONTEXT;
2513# endif
1388#endif 2514#endif
1389 BOOT_PAGESIZE; 2515 BOOT_PAGESIZE;
1390 2516
1391 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2517 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1392 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2518 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2519
2520 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2521 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2522 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2523
2524 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2525 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2526 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 2527
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2528 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 2529
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2530 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2531 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1402 main_top_env = PL_top_env; 2536 main_top_env = PL_top_env;
1403 2537
1404 while (main_top_env->je_prev) 2538 while (main_top_env->je_prev)
1405 main_top_env = main_top_env->je_prev; 2539 main_top_env = main_top_env->je_prev;
1406 2540
2541 {
2542 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2543
2544 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2545 hv_store_ent (PL_custom_op_names, slf,
2546 newSVpv ("coro_slf", 0), 0);
2547
2548 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2549 hv_store_ent (PL_custom_op_descs, slf,
2550 newSVpv ("coro schedule like function", 0), 0);
2551 }
2552
1407 coroapi.ver = CORO_API_VERSION; 2553 coroapi.ver = CORO_API_VERSION;
2554 coroapi.rev = CORO_API_REVISION;
2555
1408 coroapi.transfer = api_transfer; 2556 coroapi.transfer = api_transfer;
2557
2558 coroapi.sv_state = SvSTATE_;
2559 coroapi.execute_slf = api_execute_slf;
2560 coroapi.prepare_nop = prepare_nop;
2561 coroapi.prepare_schedule = prepare_schedule;
2562 coroapi.prepare_cede = prepare_cede;
2563 coroapi.prepare_cede_notself = prepare_cede_notself;
2564
2565 {
2566 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2567
2568 if (!svp) croak ("Time::HiRes is required");
2569 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2570
2571 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2572 }
1409 2573
1410 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2574 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1411} 2575}
1412 2576
1413SV * 2577SV *
1414new (char *klass, ...) 2578new (char *klass, ...)
1415 CODE: 2579 CODE:
1416{ 2580{
1417 struct coro *coro; 2581 struct coro *coro;
2582 MAGIC *mg;
1418 HV *hv; 2583 HV *hv;
1419 int i; 2584 int i;
1420 2585
1421 Newz (0, coro, 1, struct coro); 2586 Newz (0, coro, 1, struct coro);
1422 coro->args = newAV (); 2587 coro->args = newAV ();
… …
1425 if (coro_first) coro_first->prev = coro; 2590 if (coro_first) coro_first->prev = coro;
1426 coro->next = coro_first; 2591 coro->next = coro_first;
1427 coro_first = coro; 2592 coro_first = coro;
1428 2593
1429 coro->hv = hv = newHV (); 2594 coro->hv = hv = newHV ();
1430 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2595 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2596 mg->mg_flags |= MGf_DUP;
1431 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2597 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1432 2598
2599 av_extend (coro->args, items - 1);
1433 for (i = 1; i < items; i++) 2600 for (i = 1; i < items; i++)
1434 av_push (coro->args, newSVsv (ST (i))); 2601 av_push (coro->args, newSVsv (ST (i)));
1435} 2602}
1436 OUTPUT: 2603 OUTPUT:
1437 RETVAL 2604 RETVAL
1438 2605
1439# these not obviously related functions are all rolled into the same xs
1440# function to increase chances that they all will call transfer with the same
1441# stack offset
1442void 2606void
1443_set_stacklevel (...) 2607transfer (...)
1444 ALIAS: 2608 PROTOTYPE: $$
1445 Coro::State::transfer = 1 2609 CODE:
1446 Coro::schedule = 2 2610 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1447 Coro::cede = 3
1448 Coro::cede_notself = 4
1449 CODE:
1450{
1451 struct transfer_args ta;
1452
1453 switch (ix)
1454 {
1455 case 0:
1456 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1457 ta.next = 0;
1458 break;
1459
1460 case 1:
1461 if (items != 2)
1462 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1463
1464 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1465 break;
1466
1467 case 2:
1468 prepare_schedule (aTHX_ &ta);
1469 break;
1470
1471 case 3:
1472 prepare_cede (aTHX_ &ta);
1473 break;
1474
1475 case 4:
1476 if (!prepare_cede_notself (aTHX_ &ta))
1477 XSRETURN_EMPTY;
1478
1479 break;
1480 }
1481
1482 BARRIER;
1483 TRANSFER (ta);
1484
1485 if (GIMME_V != G_VOID && ta.next != ta.prev)
1486 XSRETURN_YES;
1487}
1488 2611
1489bool 2612bool
1490_destroy (SV *coro_sv) 2613_destroy (SV *coro_sv)
1491 CODE: 2614 CODE:
1492 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2615 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1493 OUTPUT: 2616 OUTPUT:
1494 RETVAL 2617 RETVAL
1495 2618
1496void 2619void
1497_exit (code) 2620_exit (int code)
1498 int code
1499 PROTOTYPE: $ 2621 PROTOTYPE: $
1500 CODE: 2622 CODE:
1501 _exit (code); 2623 _exit (code);
1502 2624
1503int 2625int
1504cctx_stacksize (int new_stacksize = 0) 2626cctx_stacksize (int new_stacksize = 0)
2627 PROTOTYPE: ;$
1505 CODE: 2628 CODE:
1506 RETVAL = coro_stacksize; 2629 RETVAL = cctx_stacksize;
1507 if (new_stacksize) 2630 if (new_stacksize)
2631 {
1508 coro_stacksize = new_stacksize; 2632 cctx_stacksize = new_stacksize;
2633 ++cctx_gen;
2634 }
1509 OUTPUT: 2635 OUTPUT:
1510 RETVAL 2636 RETVAL
1511 2637
1512int 2638int
2639cctx_max_idle (int max_idle = 0)
2640 PROTOTYPE: ;$
2641 CODE:
2642 RETVAL = cctx_max_idle;
2643 if (max_idle > 1)
2644 cctx_max_idle = max_idle;
2645 OUTPUT:
2646 RETVAL
2647
2648int
1513cctx_count () 2649cctx_count ()
2650 PROTOTYPE:
1514 CODE: 2651 CODE:
1515 RETVAL = cctx_count; 2652 RETVAL = cctx_count;
1516 OUTPUT: 2653 OUTPUT:
1517 RETVAL 2654 RETVAL
1518 2655
1519int 2656int
1520cctx_idle () 2657cctx_idle ()
2658 PROTOTYPE:
1521 CODE: 2659 CODE:
1522 RETVAL = cctx_idle; 2660 RETVAL = cctx_idle;
1523 OUTPUT: 2661 OUTPUT:
1524 RETVAL 2662 RETVAL
1525 2663
1526void 2664void
1527list () 2665list ()
2666 PROTOTYPE:
1528 PPCODE: 2667 PPCODE:
1529{ 2668{
1530 struct coro *coro; 2669 struct coro *coro;
1531 for (coro = coro_first; coro; coro = coro->next) 2670 for (coro = coro_first; coro; coro = coro->next)
1532 if (coro->hv) 2671 if (coro->hv)
… …
1537call (Coro::State coro, SV *coderef) 2676call (Coro::State coro, SV *coderef)
1538 ALIAS: 2677 ALIAS:
1539 eval = 1 2678 eval = 1
1540 CODE: 2679 CODE:
1541{ 2680{
1542 if (coro->mainstack) 2681 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1543 { 2682 {
1544 struct coro temp; 2683 struct coro temp;
1545 Zero (&temp, 1, struct coro);
1546 2684
1547 if (!(coro->flags & CF_RUNNING)) 2685 if (!(coro->flags & CF_RUNNING))
1548 { 2686 {
2687 PUTBACK;
1549 save_perl (aTHX_ &temp); 2688 save_perl (aTHX_ &temp);
1550 load_perl (aTHX_ coro); 2689 load_perl (aTHX_ coro);
1551 } 2690 }
1552 2691
1553 { 2692 {
1554 dSP; 2693 dSP;
1555 ENTER; 2694 ENTER;
1556 SAVETMPS; 2695 SAVETMPS;
2696 PUTBACK;
2697 PUSHSTACK;
1557 PUSHMARK (SP); 2698 PUSHMARK (SP);
1558 PUTBACK; 2699
1559 if (ix) 2700 if (ix)
1560 eval_sv (coderef, 0); 2701 eval_sv (coderef, 0);
1561 else 2702 else
1562 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2703 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2704
2705 POPSTACK;
1563 SPAGAIN; 2706 SPAGAIN;
1564 FREETMPS; 2707 FREETMPS;
1565 LEAVE; 2708 LEAVE;
1566 PUTBACK; 2709 PUTBACK;
1567 } 2710 }
1568 2711
1569 if (!(coro->flags & CF_RUNNING)) 2712 if (!(coro->flags & CF_RUNNING))
1570 { 2713 {
1571 save_perl (aTHX_ coro); 2714 save_perl (aTHX_ coro);
1572 load_perl (aTHX_ &temp); 2715 load_perl (aTHX_ &temp);
2716 SPAGAIN;
1573 } 2717 }
1574 } 2718 }
1575} 2719}
1576 2720
1577SV * 2721SV *
… …
1586 RETVAL = boolSV (coro->flags & ix); 2730 RETVAL = boolSV (coro->flags & ix);
1587 OUTPUT: 2731 OUTPUT:
1588 RETVAL 2732 RETVAL
1589 2733
1590void 2734void
2735throw (Coro::State self, SV *throw = &PL_sv_undef)
2736 PROTOTYPE: $;$
2737 CODE:
2738{
2739 struct coro *current = SvSTATE_current;
2740 SV **throwp = self == current ? &CORO_THROW : &self->except;
2741 SvREFCNT_dec (*throwp);
2742 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2743}
2744
2745void
1591api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2746api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2747 PROTOTYPE: $;$
2748 C_ARGS: aTHX_ coro, flags
1592 2749
1593SV * 2750SV *
1594has_stack (Coro::State coro) 2751has_cctx (Coro::State coro)
1595 PROTOTYPE: $ 2752 PROTOTYPE: $
1596 CODE: 2753 CODE:
1597 RETVAL = boolSV (!!coro->cctx); 2754 RETVAL = boolSV (!!coro->cctx);
1598 OUTPUT: 2755 OUTPUT:
1599 RETVAL 2756 RETVAL
… …
1604 CODE: 2761 CODE:
1605 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2762 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1606 OUTPUT: 2763 OUTPUT:
1607 RETVAL 2764 RETVAL
1608 2765
1609IV 2766UV
1610rss (Coro::State coro) 2767rss (Coro::State coro)
1611 PROTOTYPE: $ 2768 PROTOTYPE: $
1612 ALIAS: 2769 ALIAS:
1613 usecount = 1 2770 usecount = 1
1614 CODE: 2771 CODE:
… …
1618 case 1: RETVAL = coro->usecount; break; 2775 case 1: RETVAL = coro->usecount; break;
1619 } 2776 }
1620 OUTPUT: 2777 OUTPUT:
1621 RETVAL 2778 RETVAL
1622 2779
2780void
2781force_cctx ()
2782 PROTOTYPE:
2783 CODE:
2784 SvSTATE_current->cctx->idle_sp = 0;
2785
2786void
2787swap_defsv (Coro::State self)
2788 PROTOTYPE: $
2789 ALIAS:
2790 swap_defav = 1
2791 CODE:
2792 if (!self->slot)
2793 croak ("cannot swap state with coroutine that has no saved state,");
2794 else
2795 {
2796 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2797 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2798
2799 SV *tmp = *src; *src = *dst; *dst = tmp;
2800 }
2801
1623 2802
1624MODULE = Coro::State PACKAGE = Coro 2803MODULE = Coro::State PACKAGE = Coro
1625 2804
1626BOOT: 2805BOOT:
1627{ 2806{
1628 int i; 2807 int i;
1629 2808
1630 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1631 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1632 av_async_pool = get_av ("Coro::async_pool", TRUE); 2809 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2810 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2811 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1633 2812
1634 coro_current = get_sv ("Coro::current", FALSE); 2813 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1635 SvREADONLY_on (coro_current); 2814 SvREADONLY_on (coro_current);
1636 2815
1637 coro_stash = gv_stashpv ("Coro", TRUE); 2816 coro_stash = gv_stashpv ("Coro", TRUE);
1638 2817
1639 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2818 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1640 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2819 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1641 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2820 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1642 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2821 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1645 2824
1646 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2825 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1647 coro_ready[i] = newAV (); 2826 coro_ready[i] = newAV ();
1648 2827
1649 { 2828 {
1650 SV *sv = perl_get_sv("Coro::API", 1); 2829 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1651 2830
1652 coroapi.schedule = api_schedule; 2831 coroapi.schedule = api_schedule;
1653 coroapi.cede = api_cede; 2832 coroapi.cede = api_cede;
1654 coroapi.cede_notself = api_cede_notself; 2833 coroapi.cede_notself = api_cede_notself;
1655 coroapi.ready = api_ready; 2834 coroapi.ready = api_ready;
1656 coroapi.is_ready = api_is_ready; 2835 coroapi.is_ready = api_is_ready;
1657 coroapi.nready = &coro_nready; 2836 coroapi.nready = coro_nready;
1658 coroapi.current = coro_current; 2837 coroapi.current = coro_current;
1659 2838
1660 GCoroAPI = &coroapi; 2839 /*GCoroAPI = &coroapi;*/
1661 sv_setiv (sv, (IV)&coroapi); 2840 sv_setiv (sv, (IV)&coroapi);
1662 SvREADONLY_on (sv); 2841 SvREADONLY_on (sv);
1663 } 2842 }
1664} 2843}
2844
2845void
2846schedule (...)
2847 CODE:
2848 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2849
2850void
2851cede (...)
2852 CODE:
2853 CORO_EXECUTE_SLF_XS (slf_init_cede);
2854
2855void
2856cede_notself (...)
2857 CODE:
2858 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1665 2859
1666void 2860void
1667_set_current (SV *current) 2861_set_current (SV *current)
1668 PROTOTYPE: $ 2862 PROTOTYPE: $
1669 CODE: 2863 CODE:
1670 SvREFCNT_dec (SvRV (coro_current)); 2864 SvREFCNT_dec (SvRV (coro_current));
1671 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2865 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2866
2867void
2868_set_readyhook (SV *hook)
2869 PROTOTYPE: $
2870 CODE:
2871 SvREFCNT_dec (coro_readyhook);
2872 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1672 2873
1673int 2874int
1674prio (Coro::State coro, int newprio = 0) 2875prio (Coro::State coro, int newprio = 0)
2876 PROTOTYPE: $;$
1675 ALIAS: 2877 ALIAS:
1676 nice = 1 2878 nice = 1
1677 CODE: 2879 CODE:
1678{ 2880{
1679 RETVAL = coro->prio; 2881 RETVAL = coro->prio;
… …
1694 2896
1695SV * 2897SV *
1696ready (SV *self) 2898ready (SV *self)
1697 PROTOTYPE: $ 2899 PROTOTYPE: $
1698 CODE: 2900 CODE:
1699 RETVAL = boolSV (api_ready (self)); 2901 RETVAL = boolSV (api_ready (aTHX_ self));
1700 OUTPUT: 2902 OUTPUT:
1701 RETVAL 2903 RETVAL
1702 2904
1703int 2905int
1704nready (...) 2906nready (...)
… …
1711# for async_pool speedup 2913# for async_pool speedup
1712void 2914void
1713_pool_1 (SV *cb) 2915_pool_1 (SV *cb)
1714 CODE: 2916 CODE:
1715{ 2917{
1716 struct coro *coro = SvSTATE (coro_current);
1717 HV *hv = (HV *)SvRV (coro_current); 2918 HV *hv = (HV *)SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv ((SV *)hv);
1718 AV *defav = GvAV (PL_defgv); 2920 AV *defav = GvAV (PL_defgv);
1719 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 2921 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1720 AV *invoke_av; 2922 AV *invoke_av;
1721 int i, len; 2923 int i, len;
1722 2924
1723 if (!invoke) 2925 if (!invoke)
2926 {
2927 SV *old = PL_diehook;
2928 PL_diehook = 0;
2929 SvREFCNT_dec (old);
1724 croak ("\3terminate\2\n"); 2930 croak ("\3async_pool terminate\2\n");
2931 }
1725 2932
1726 SvREFCNT_dec (coro->saved_deffh); 2933 SvREFCNT_dec (coro->saved_deffh);
1727 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 2934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1728 2935
1729 hv_store (hv, "desc", sizeof ("desc") - 1, 2936 hv_store (hv, "desc", sizeof ("desc") - 1,
1730 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 2937 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1731 2938
1732 invoke_av = (AV *)SvRV (invoke); 2939 invoke_av = (AV *)SvRV (invoke);
… …
1736 2943
1737 if (len > 0) 2944 if (len > 0)
1738 { 2945 {
1739 av_fill (defav, len - 1); 2946 av_fill (defav, len - 1);
1740 for (i = 0; i < len; ++i) 2947 for (i = 0; i < len; ++i)
1741 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 2948 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
1742 } 2949 }
1743
1744 SvREFCNT_dec (invoke);
1745} 2950}
1746 2951
1747void 2952void
1748_pool_2 (SV *cb) 2953_pool_2 (SV *cb)
1749 CODE: 2954 CODE:
1750{ 2955{
1751 struct coro *coro = SvSTATE (coro_current); 2956 HV *hv = (HV *)SvRV (coro_current);
2957 struct coro *coro = SvSTATE_hv ((SV *)hv);
1752 2958
1753 sv_setsv (cb, &PL_sv_undef); 2959 sv_setsv (cb, &PL_sv_undef);
1754 2960
1755 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh; 2961 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1756 coro->saved_deffh = 0; 2962 coro->saved_deffh = 0;
1757 2963
1758 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss) 2964 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1759 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size)) 2965 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2966 {
2967 SV *old = PL_diehook;
2968 PL_diehook = 0;
2969 SvREFCNT_dec (old);
1760 croak ("\3terminate\2\n"); 2970 croak ("\3async_pool terminate\2\n");
2971 }
1761 2972
1762 av_clear (GvAV (PL_defgv)); 2973 av_clear (GvAV (PL_defgv));
1763 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1, 2974 hv_store (hv, "desc", sizeof ("desc") - 1,
1764 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0); 2975 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1765 2976
1766 coro->prio = 0; 2977 coro->prio = 0;
1767 2978
1768 if (coro->cctx && (coro->cctx->flags & CC_TRACE)) 2979 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1769 api_trace (coro_current, 0); 2980 api_trace (aTHX_ coro_current, 0);
1770 2981
1771 av_push (av_async_pool, newSVsv (coro_current)); 2982 av_push (av_async_pool, newSVsv (coro_current));
1772} 2983}
1773 2984
1774
1775MODULE = Coro::State PACKAGE = Coro::AIO
1776
1777SV * 2985SV *
1778_get_state () 2986rouse_cb ()
2987 PROTOTYPE:
1779 CODE: 2988 CODE:
1780{ 2989 RETVAL = coro_new_rouse_cb (aTHX);
1781 struct io_state *data;
1782
1783 RETVAL = newSV (sizeof (struct io_state));
1784 data = (struct io_state *)SvPVX (RETVAL);
1785 SvCUR_set (RETVAL, sizeof (struct io_state));
1786 SvPOK_only (RETVAL);
1787
1788 data->errorno = errno;
1789 data->laststype = PL_laststype;
1790 data->laststatval = PL_laststatval;
1791 data->statcache = PL_statcache;
1792}
1793 OUTPUT: 2990 OUTPUT:
1794 RETVAL 2991 RETVAL
1795 2992
1796void 2993void
1797_set_state (char *data_) 2994rouse_wait (SV *cb = 0)
1798 PROTOTYPE: $ 2995 PROTOTYPE: ;$
2996 PPCODE:
2997 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2998
2999
3000MODULE = Coro::State PACKAGE = PerlIO::cede
3001
3002BOOT:
3003 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3004
3005
3006MODULE = Coro::State PACKAGE = Coro::Semaphore
3007
3008SV *
3009new (SV *klass, SV *count = 0)
1799 CODE: 3010 CODE:
1800{ 3011 RETVAL = sv_bless (
1801 struct io_state *data = (void *)data_; 3012 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3013 GvSTASH (CvGV (cv))
3014 );
3015 OUTPUT:
3016 RETVAL
1802 3017
1803 errno = data->errorno; 3018# helper for Coro::Channel
1804 PL_laststype = data->laststype; 3019SV *
1805 PL_laststatval = data->laststatval; 3020_alloc (int count)
1806 PL_statcache = data->statcache; 3021 CODE:
1807} 3022 RETVAL = coro_waitarray_new (aTHX_ count);
3023 OUTPUT:
3024 RETVAL
1808 3025
3026SV *
3027count (SV *self)
3028 CODE:
3029 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3030 OUTPUT:
3031 RETVAL
3032
3033void
3034up (SV *self, int adjust = 1)
3035 ALIAS:
3036 adjust = 1
3037 CODE:
3038 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3039
3040void
3041down (SV *self)
3042 CODE:
3043 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3044
3045void
3046wait (SV *self)
3047 CODE:
3048 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3049
3050void
3051try (SV *self)
3052 PPCODE:
3053{
3054 AV *av = (AV *)SvRV (self);
3055 SV *count_sv = AvARRAY (av)[0];
3056 IV count = SvIVX (count_sv);
3057
3058 if (count > 0)
3059 {
3060 --count;
3061 SvIVX (count_sv) = count;
3062 XSRETURN_YES;
3063 }
3064 else
3065 XSRETURN_NO;
3066}
3067
3068void
3069waiters (SV *self)
3070 PPCODE:
3071{
3072 AV *av = (AV *)SvRV (self);
3073 int wcount = AvFILLp (av) + 1 - 1;
3074
3075 if (GIMME_V == G_SCALAR)
3076 XPUSHs (sv_2mortal (newSViv (wcount)));
3077 else
3078 {
3079 int i;
3080 EXTEND (SP, wcount);
3081 for (i = 1; i <= wcount; ++i)
3082 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3083 }
3084}
3085
3086MODULE = Coro::State PACKAGE = Coro::Signal
3087
3088SV *
3089new (SV *klass)
3090 CODE:
3091 RETVAL = sv_bless (
3092 coro_waitarray_new (aTHX_ 0),
3093 GvSTASH (CvGV (cv))
3094 );
3095 OUTPUT:
3096 RETVAL
3097
3098void
3099wait (SV *self)
3100 CODE:
3101 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3102
3103void
3104broadcast (SV *self)
3105 CODE:
3106{
3107 AV *av = (AV *)SvRV (self);
3108 coro_signal_wake (aTHX_ av, AvFILLp (av));
3109}
3110
3111void
3112send (SV *self)
3113 CODE:
3114{
3115 AV *av = (AV *)SvRV (self);
3116
3117 if (AvFILLp (av))
3118 coro_signal_wake (aTHX_ av, 1);
3119 else
3120 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3121}
3122
3123IV
3124awaited (SV *self)
3125 CODE:
3126 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3127 OUTPUT:
3128 RETVAL
3129
3130
3131MODULE = Coro::State PACKAGE = Coro::AnyEvent
3132
3133BOOT:
3134 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3135
3136void
3137_schedule (...)
3138 CODE:
3139{
3140 static int incede;
3141
3142 api_cede_notself (aTHX);
3143
3144 ++incede;
3145 while (coro_nready >= incede && api_cede (aTHX))
3146 ;
3147
3148 sv_setsv (sv_activity, &PL_sv_undef);
3149 if (coro_nready >= incede)
3150 {
3151 PUSHMARK (SP);
3152 PUTBACK;
3153 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3154 }
3155
3156 --incede;
3157}
3158
3159
3160MODULE = Coro::State PACKAGE = Coro::AIO
3161
3162void
3163_register (char *target, char *proto, SV *req)
3164 CODE:
3165{
3166 HV *st;
3167 GV *gvp;
3168 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3169 /* newXSproto doesn't return the CV on 5.8 */
3170 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3171 sv_setpv ((SV *)slf_cv, proto);
3172 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3173}
3174

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