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Comparing Coro/Coro/State.xs (file contents):
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC vs.
Revision 1.302 by root, Wed Nov 19 04:48:24 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
70/* 5.8.7 */ 104/* 5.8.7 */
71#ifndef SvRV_set 105#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 106# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 107#endif
74 108
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 110# undef CORO_STACKGUARD
77#endif 111#endif
78 112
79#ifndef STACKGUARD 113#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 114# define CORO_STACKGUARD 0
81#endif 115#endif
82 116
83/* prefer perl internal functions over our own? */ 117/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 118#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 119# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 120#endif
87 121
88/* The next macro should declare a variable stacklevel that contains and approximation 122/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 123 * portable way as possible. */
90 * and should be unique. */ 124#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
92#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
93 131
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
95 133
96#if __GNUC__ >= 3 134#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
99#else 138#else
100# define attribute(x) 139# define attribute(x)
101# define BARRIER 140# define expect(expr,value) (expr)
141# define INLINE static
102#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
103 146
104#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
105 148
106#include "CoroAPI.h" 149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
107 151
108#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
109static perl_mutex coro_mutex; 153# if CORO_PTHREAD
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 155# endif
156#endif
116 157
117struct io_state 158static double (*nvtime)(); /* so why doesn't it take void? */
118{
119 int errorno;
120 I32 laststype;
121 int laststatval;
122 Stat_t statcache;
123};
124 159
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;
165static size_t cctx_stacksize = CORO_STACKSIZE;
125static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
126static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
127static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
128static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
129 185
130static struct coro_cctx *cctx_first; 186static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 187static int cctx_count, cctx_idle;
132 188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
133/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 199typedef struct coro_cctx
200{
135 struct coro_cctx *next; 201 struct coro_cctx *next;
136 202
137 /* the stack */ 203 /* the stack */
138 void *sptr; 204 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
140 206
141 /* cpu state */ 207 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
143 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
144 JMPENV *top_env; 210 JMPENV *top_env;
145 coro_context cctx; 211 coro_context cctx;
146 212
147 int inuse; 213 U32 gen;
148
149#if USE_VALGRIND 214#if CORO_USE_VALGRIND
150 int valgrind_id; 215 int valgrind_id;
151#endif 216#endif
217 unsigned char flags;
152} coro_cctx; 218} coro_cctx;
153 219
154enum { 220enum {
155 CF_RUNNING = 0x0001, /* coroutine is running */ 221 CF_RUNNING = 0x0001, /* coroutine is running */
156 CF_READY = 0x0002, /* coroutine is ready */ 222 CF_READY = 0x0002, /* coroutine is ready */
157 CF_NEW = 0x0004, /* ahs never been switched to */ 223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
158}; 225};
159 226
160/* this is a structure representing a perl-level coroutine */ 227/* the structure where most of the perl state is stored, overlaid on the cxstack */
161struct coro { 228typedef struct
162 /* the c coroutine allocated to this perl coroutine, if any */ 229{
163 coro_cctx *cctx; 230 SV *defsv;
164 231 AV *defav;
165 /* data associated with this coroutine (initial args) */ 232 SV *errsv;
166 AV *args; 233 SV *irsgv;
167 int refcnt;
168 int save; /* CORO_SAVE flags */
169 int flags; /* CF_ flags */
170
171 /* optionally saved, might be zero */
172 AV *defav; /* @_ */
173 SV *defsv; /* $_ */
174 SV *errsv; /* $@ */
175 SV *irssv; /* $/ */
176 SV *irssv_sv; /* real $/ cache */
177
178#define VAR(name,type) type name; 234#define VAR(name,type) type name;
179# include "state.h" 235# include "state.h"
180#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);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
181 259
182 /* coro process data */ 260 /* coro process data */
183 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
184}; 270};
185 271
186typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
187typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
188 274
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 */
279
280/** Coro ********************************************************************/
281
282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
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
189static AV * 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}
327
328static AV *
190coro_clone_padlist (CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
191{ 330{
192 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
193 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
194 333
195 newpadlist = newAV (); 334 newpadlist = newAV ();
196 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
197#if PERL_VERSION_ATLEAST (5,9,0) 336#if PERL_VERSION_ATLEAST (5,10,0)
198 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
199#else 338#else
200 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
201#endif 340#endif
202 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
203 --AvFILLp (padlist); 342 --AvFILLp (padlist);
204 343
205 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
206 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
207 346
208 return newpadlist; 347 return newpadlist;
209} 348}
210 349
211static void 350static void
212free_padlist (AV *padlist) 351free_padlist (pTHX_ AV *padlist)
213{ 352{
214 /* may be during global destruction */ 353 /* may be during global destruction */
215 if (SvREFCNT (padlist)) 354 if (SvREFCNT (padlist))
216 { 355 {
217 I32 i = AvFILLp (padlist); 356 I32 i = AvFILLp (padlist);
… …
238 AV *padlist; 377 AV *padlist;
239 AV *av = (AV *)mg->mg_obj; 378 AV *av = (AV *)mg->mg_obj;
240 379
241 /* casting is fun. */ 380 /* casting is fun. */
242 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
243 free_padlist (padlist); 382 free_padlist (aTHX_ padlist);
244 383
245 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
246 385
247 return 0; 386 return 0;
248} 387}
249 388
389#define CORO_MAGIC_type_cv 26
250#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
251 391
252static 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};
253 396
254#define CORO_MAGIC(cv) \ 397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
255 SvMAGIC (cv) \ 399 ? SvMAGIC (sv) \
256 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 400 : mg_find (sv, type))
257 ? SvMAGIC (cv) \ 401
258 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
259 : 0 405 : 0)
406
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 *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
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))
260 439
261/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
262static void 441static void
263get_padlist (CV *cv) 442get_padlist (pTHX_ CV *cv)
264{ 443{
265 MAGIC *mg = CORO_MAGIC (cv); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
266 AV *av; 445 AV *av;
267 446
268 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
269 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
270 else 449 else
271 { 450 {
272#if PREFER_PERL_FUNCTIONS 451#if CORO_PREFER_PERL_FUNCTIONS
273 /* this is probably cleaner, but also slower? */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
274 CV *cp = Perl_cv_clone (cv); 454 CV *cp = Perl_cv_clone (cv);
275 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
276 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
277 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
278#else 458#else
279 CvPADLIST (cv) = coro_clone_padlist (cv); 459 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
280#endif 460#endif
281 } 461 }
282} 462}
283 463
284static void 464static void
285put_padlist (CV *cv) 465put_padlist (pTHX_ CV *cv)
286{ 466{
287 MAGIC *mg = CORO_MAGIC (cv); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
288 AV *av; 468 AV *av;
289 469
290 if (!mg) 470 if (expect_false (!mg))
291 { 471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
292 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
293 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
294 mg->mg_virtual = &vtbl_coro;
295 mg->mg_obj = (SV *)newAV ();
296 }
297 472
298 av = (AV *)mg->mg_obj; 473 av = (AV *)mg->mg_obj;
299 474
300 if (AvFILLp (av) >= AvMAX (av)) 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
301 av_extend (av, AvMAX (av) + 1); 476 av_extend (av, AvMAX (av) + 1);
302 477
303 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
304} 479}
305 480
306#define SB do { 481/** load & save, init *******************************************************/
307#define SE } while (0)
308 482
309#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
310
311static void 483static void
312load_perl (Coro__State c) 484load_perl (pTHX_ Coro__State c)
313{ 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
314#define VAR(name,type) PL_ ## name = c->name; 496 #define VAR(name,type) PL_ ## name = slot->name;
315# include "state.h" 497 # include "state.h"
316#undef VAR 498 #undef VAR
317
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321 if (c->irssv)
322 {
323 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
324 SvREFCNT_dec (c->irssv);
325 else
326 {
327 REPLACE_SV (PL_rs, c->irssv);
328 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
329 sv_setsv (c->irssv_sv, PL_rs);
330 }
331 }
332 499
333 { 500 {
334 dSP; 501 dSP;
502
335 CV *cv; 503 CV *cv;
336 504
337 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
338 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
339 { 507 {
340 put_padlist (cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
341 CvDEPTH (cv) = PTR2IV (POPs); 509 CvDEPTH (cv) = PTR2IV (POPs);
342 CvPADLIST (cv) = (AV *)POPs; 510 CvPADLIST (cv) = (AV *)POPs;
343 } 511 }
344 512
345 PUTBACK; 513 PUTBACK;
346 } 514 }
347}
348 515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
349static void 520static void
350save_perl (Coro__State c) 521save_perl (pTHX_ Coro__State c)
351{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
352 { 526 {
353 dSP; 527 dSP;
354 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
355 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
356 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
358 /* 532 /*
359 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
360 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
361 */ 535 */
362 536
363 EXTEND (SP, 3 + 1);
364 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
365 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
366 for (;;) 539 for (;;)
367 { 540 {
368 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
369 { 542 {
370 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
371 544
372 if (CxTYPE (cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
373 { 546 {
374 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
375 548
376 if (CvDEPTH (cv)) 549 if (expect_true (CvDEPTH (cv)))
377 { 550 {
378 EXTEND (SP, 3); 551 EXTEND (SP, 3);
379 PUSHs ((SV *)CvPADLIST (cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
380 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
382 555
383 CvDEPTH (cv) = 0; 556 CvDEPTH (cv) = 0;
384 get_padlist (cv); 557 get_padlist (aTHX_ cv);
385 } 558 }
386 } 559 }
387 } 560 }
388 561
389 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
390 break; 563 break;
391 564
392 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
393 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
394 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
395 } 568 }
396 569
397 PUTBACK; 570 PUTBACK;
398 } 571 }
399 572
400 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
401 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
402 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
403 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 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 */
404 584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
405#define VAR(name,type)c->name = PL_ ## name; 595 #define VAR(name,type) slot->name = PL_ ## name;
406# include "state.h" 596 # include "state.h"
407#undef VAR 597 #undef VAR
598 }
408} 599}
409 600
410/* 601/*
411 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
412 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
413 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
414 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
415 */ 606 */
416#if PREFER_PERL_FUNCTIONS 607#if CORO_PREFER_PERL_FUNCTIONS
417# define coro_init_stacks init_stacks 608# define coro_init_stacks init_stacks
418#else 609#else
419static void 610static void
420coro_init_stacks () 611coro_init_stacks (pTHX)
421{ 612{
422 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 613 PL_curstackinfo = new_stackinfo(32, 8);
423 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
424 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
425 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
426 617
427 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
428 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
429 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
430 621
431 New(50,PL_tmps_stack,128,SV*); 622 New(50,PL_tmps_stack,32,SV*);
432 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
433 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
434 PL_tmps_max = 128; 625 PL_tmps_max = 32;
435 626
436 New(54,PL_markstack,32,I32); 627 New(54,PL_markstack,16,I32);
437 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
438 PL_markstack_max = PL_markstack + 32; 629 PL_markstack_max = PL_markstack + 16;
439 630
440#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
441 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
442#endif 633#endif
443 634
444 New(54,PL_scopestack,32,I32); 635 New(54,PL_scopestack,8,I32);
445 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
446 PL_scopestack_max = 32; 637 PL_scopestack_max = 8;
447 638
448 New(54,PL_savestack,64,ANY); 639 New(54,PL_savestack,24,ANY);
449 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
450 PL_savestack_max = 64; 641 PL_savestack_max = 24;
451 642
452#if !PERL_VERSION_ATLEAST (5,9,0) 643#if !PERL_VERSION_ATLEAST (5,10,0)
453 New(54,PL_retstack,16,OP*); 644 New(54,PL_retstack,4,OP*);
454 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
455 PL_retstack_max = 16; 646 PL_retstack_max = 4;
456#endif 647#endif
457} 648}
458#endif 649#endif
459 650
460/* 651/*
461 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
462 */ 653 */
463static void 654static void
464coro_destroy_stacks () 655coro_destruct_stacks (pTHX)
465{ 656{
466 if (!IN_DESTRUCT)
467 {
468 /* restore all saved variables and stuff */
469 LEAVE_SCOPE (0);
470 assert (PL_tmps_floor == -1);
471
472 /* free all temporaries */
473 FREETMPS;
474 assert (PL_tmps_ix == -1);
475
476 POPSTACK_TO (PL_mainstack);
477 }
478
479 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
480 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
481 659
482 while (PL_curstackinfo) 660 while (PL_curstackinfo)
483 { 661 {
… …
493 671
494 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
495 Safefree (PL_markstack); 673 Safefree (PL_markstack);
496 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
497 Safefree (PL_savestack); 675 Safefree (PL_savestack);
498#if !PERL_VERSION_ATLEAST (5,9,0) 676#if !PERL_VERSION_ATLEAST (5,10,0)
499 Safefree (PL_retstack); 677 Safefree (PL_retstack);
500#endif 678#endif
501} 679}
502 680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
692 {
693 slot = &tmp_slot;
694
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
698 }
699 else
700 slot = coro->slot;
701
702 if (slot)
703 {
704 rss += sizeof (slot->curstackinfo);
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 }
716 }
717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
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 */
503static void 743static int
504setup_coro (struct coro *coro) 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 */
829coro_setup (pTHX_ struct coro *coro)
505{ 830{
506 /* 831 /*
507 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
508 */ 833 */
509
510 coro_init_stacks (); 834 coro_init_stacks (aTHX);
511 835
836 PL_runops = RUNOPS_DEFAULT;
512 PL_curcop = &PL_compiling; 837 PL_curcop = &PL_compiling;
513 PL_in_eval = EVAL_NULL; 838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
514 PL_curpm = 0; 840 PL_curpm = 0;
841 PL_curpad = 0;
515 PL_localizing = 0; 842 PL_localizing = 0;
516 PL_dirty = 0; 843 PL_dirty = 0;
517 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);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
518 859
519 { 860 {
520 dSP; 861 dSP;
521 LOGOP myop; 862 UNOP myop;
522 863
523 SvREFCNT_dec (GvAV (PL_defgv));
524 GvAV (PL_defgv) = coro->args; coro->args = 0;
525
526 Zero (&myop, 1, LOGOP); 864 Zero (&myop, 1, UNOP);
527 myop.op_next = Nullop; 865 myop.op_next = Nullop;
528 myop.op_flags = OPf_WANT_VOID; 866 myop.op_flags = OPf_WANT_VOID;
529 867
530 PUSHMARK (SP); 868 PUSHMARK (SP);
531 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
532 PUTBACK; 870 PUTBACK;
533 PL_op = (OP *)&myop; 871 PL_op = (OP *)&myop;
534 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
535 SPAGAIN; 873 SPAGAIN;
536 } 874 }
537 875
538 ENTER; /* necessary e.g. for dounwind */ 876 /* this newly created coroutine might be run on an existing cctx which most
539} 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 */
540 881
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
541static void 894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
915 SvREFCNT_dec (GvAV (PL_defgv));
916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
542free_coro_mortal () 932free_coro_mortal (pTHX)
543{ 933{
544 if (coro_mortal) 934 if (expect_true (coro_mortal))
545 { 935 {
546 SvREFCNT_dec (coro_mortal); 936 SvREFCNT_dec (coro_mortal);
547 coro_mortal = 0; 937 coro_mortal = 0;
548 } 938 }
549} 939}
550 940
551/* inject a fake call to Coro::State::_cctx_init into the execution */ 941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
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 */
552static void NOINLINE 1084static void NOINLINE
553prepare_cctx (coro_cctx *cctx) 1085cctx_prepare (pTHX_ coro_cctx *cctx)
554{ 1086{
555 dSP;
556 LOGOP myop;
557
558 Zero (&myop, 1, LOGOP);
559 myop.op_next = PL_op;
560 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561
562 PUSHMARK (SP);
563 EXTEND (SP, 2);
564 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
565 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
566 PUTBACK;
567 PL_op = (OP *)&myop;
568 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
569 SPAGAIN;
570}
571
572static void
573coro_run (void *arg)
574{
575 /* coro_run is the alternative tail of transfer(), so unlock here. */
576 UNLOCK;
577
578 /*
579 * this is a _very_ stripped down perl interpreter ;)
580 */
581 PL_top_env = &PL_start_env; 1087 PL_top_env = &PL_start_env;
582 1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
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);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1124 dTHX;
1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
583 /* inject call to cctx_init */ 1130 /* inject a fake subroutine call to cctx_init */
584 prepare_cctx ((coro_cctx *)arg); 1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
585 1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
586 /* somebody will hit me for both perl_run and PL_restartop */ 1136 /* somebody or something will hit me for both perl_run and PL_restartop */
587 PL_restartop = PL_op; 1137 PL_restartop = PL_op;
588 perl_run (PL_curinterp); 1138 perl_run (PL_curinterp);
589 1139
590 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1140 /*
591 abort (); 1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
592} 1150}
593 1151
594static coro_cctx * 1152static coro_cctx *
595cctx_new () 1153cctx_new ()
596{ 1154{
597 coro_cctx *cctx; 1155 coro_cctx *cctx;
598 1156
599 ++cctx_count; 1157 ++cctx_count;
600
601 Newz (0, cctx, 1, coro_cctx); 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 ();
1184 void *stack_start;
1185 size_t stack_size;
602 1186
603#if HAVE_MMAP 1187#if HAVE_MMAP
604
605 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
606 /* mmap supposedly does allocate-on-write for us */ 1189 /* mmap supposedly does allocate-on-write for us */
607 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
608 1191
609 if (cctx->sptr == (void *)-1) 1192 if (cctx->sptr != (void *)-1)
1193 {
1194 #if CORO_STACKGUARD
1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
610 { 1200 }
1201 else
1202#endif
1203 {
1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
1206
1207 if (!cctx->sptr)
1208 {
611 perror ("FATAL: unable to mmap stack for coroutine"); 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
612 _exit (EXIT_FAILURE); 1210 _exit (EXIT_FAILURE);
613 } 1211 }
614 1212
615# if STACKGUARD 1213 stack_start = cctx->sptr;
616 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1214 stack_size = cctx->ssize;
617# endif
618
619#else
620
621 cctx->ssize = STACKSIZE * (long)sizeof (long);
622 New (0, cctx->sptr, STACKSIZE, long);
623
624 if (!cctx->sptr)
625 { 1215 }
626 perror ("FATAL: unable to malloc stack for coroutine");
627 _exit (EXIT_FAILURE);
628 }
629 1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
630#endif 1219 #endif
631 1220
632#if USE_VALGRIND 1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
633 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
634 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
635 cctx->ssize + (char *)cctx->sptr
636 );
637#endif
638
639 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
640 1222
641 return cctx; 1223 return cctx;
642} 1224}
643 1225
644static void 1226static void
… …
646{ 1228{
647 if (!cctx) 1229 if (!cctx)
648 return; 1230 return;
649 1231
650 --cctx_count; 1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
651 1234
652#if USE_VALGRIND 1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
653 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
654#endif 1240 #endif
655 1241
656#if HAVE_MMAP 1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
657 munmap (cctx->sptr, cctx->ssize); 1244 munmap (cctx->sptr, cctx->ssize);
658#else 1245 else
1246#endif
659 Safefree (cctx->sptr); 1247 Safefree (cctx->sptr);
660#endif 1248 }
661 1249
662 Safefree (cctx); 1250 Safefree (cctx);
663} 1251}
664 1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
665static coro_cctx * 1256static coro_cctx *
666cctx_get () 1257cctx_get (pTHX)
667{ 1258{
668 coro_cctx *cctx; 1259 while (expect_true (cctx_first))
669
670 if (cctx_first)
671 { 1260 {
672 cctx = cctx_first; 1261 coro_cctx *cctx = cctx_first;
673 cctx_first = cctx->next; 1262 cctx_first = cctx->next;
674 --cctx_idle; 1263 --cctx_idle;
675 } 1264
676 else 1265 if (expect_true (!CCTX_EXPIRED (cctx)))
677 { 1266 return cctx;
678 cctx = cctx_new (); 1267
679 PL_op = PL_op->op_next; 1268 cctx_destroy (cctx);
680 } 1269 }
681 1270
682 return cctx; 1271 return cctx_new_run ();
683} 1272}
684 1273
685static void 1274static void
686cctx_put (coro_cctx *cctx) 1275cctx_put (coro_cctx *cctx)
687{ 1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
688 /* free another cctx if overlimit */ 1279 /* free another cctx if overlimit */
689 if (cctx_idle >= MAX_IDLE_CCTX) 1280 if (expect_false (cctx_idle >= cctx_max_idle))
690 { 1281 {
691 coro_cctx *first = cctx_first; 1282 coro_cctx *first = cctx_first;
692 cctx_first = first->next; 1283 cctx_first = first->next;
693 --cctx_idle; 1284 --cctx_idle;
694 1285
695 assert (!first->inuse);
696 cctx_destroy (first); 1286 cctx_destroy (first);
697 } 1287 }
698 1288
699 ++cctx_idle; 1289 ++cctx_idle;
700 cctx->next = cctx_first; 1290 cctx->next = cctx_first;
701 cctx_first = cctx; 1291 cctx_first = cctx;
702} 1292}
703 1293
704/* never call directly, always through the coro_state_transfer global variable */ 1294/** coroutine switching *****************************************************/
705static void NOINLINE 1295
1296static void
706transfer (struct coro *prev, struct coro *next) 1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
707{ 1322{
708 dSTACKLEVEL; 1323 dSTACKLEVEL;
709 1324
710 /* sometimes transfer is only called to set idle_sp */ 1325 /* sometimes transfer is only called to set idle_sp */
711 if (!next) 1326 if (expect_false (!next))
712 { 1327 {
713 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
714 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
715 } 1330 }
716 else if (prev != next) 1331 else if (expect_true (prev != next))
717 { 1332 {
718 coro_cctx *prev__cctx; 1333 coro_cctx *prev__cctx;
719 1334
720 if (prev->flags & CF_NEW) 1335 if (expect_false (prev->flags & CF_NEW))
721 { 1336 {
722 /* create a new empty context */ 1337 /* create a new empty/source context */
723 Newz (0, prev->cctx, 1, coro_cctx); 1338 prev->cctx = cctx_new_empty ();
724 prev->cctx->inuse = 1;
725 prev->flags &= ~CF_NEW; 1339 prev->flags &= ~CF_NEW;
726 prev->flags |= CF_RUNNING; 1340 prev->flags |= CF_RUNNING;
727 } 1341 }
728 1342
729 /*TODO: must not croak here */
730 if (!prev->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
732
733 if (next->flags & CF_RUNNING)
734 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
735
736 prev->flags &= ~CF_RUNNING; 1343 prev->flags &= ~CF_RUNNING;
737 next->flags |= CF_RUNNING; 1344 next->flags |= CF_RUNNING;
738 1345
739 LOCK; 1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
740 1348
741 if (next->flags & CF_NEW) 1349 if (expect_false (next->flags & CF_NEW))
742 { 1350 {
743 /* need to start coroutine */ 1351 /* need to start coroutine */
744 next->flags &= ~CF_NEW; 1352 next->flags &= ~CF_NEW;
745 /* first get rid of the old state */
746 save_perl (prev);
747 /* setup coroutine call */ 1353 /* setup coroutine call */
748 setup_coro (next); 1354 coro_setup (aTHX_ next);
749 /* need a new stack */
750 assert (!next->cctx);
751 } 1355 }
752 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 ))
753 { 1367 {
754 /* coroutine already started */ 1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
755 save_perl (prev); 1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
756 load_perl (next); 1370
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);
1378
1379 cctx_put (prev__cctx);
757 } 1380 }
758 1381
759 prev__cctx = prev->cctx; 1382 ++next->usecount;
760 1383
761 /* possibly "free" the cctx */
762 if (prev__cctx->idle_sp == STACKLEVEL)
763 {
764 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
765 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
766
767 prev->cctx = 0;
768
769 cctx_put (prev__cctx);
770 prev__cctx->inuse = 0;
771 }
772
773 if (!next->cctx) 1384 if (expect_true (!next->cctx))
774 {
775 next->cctx = cctx_get (); 1385 next->cctx = cctx_get (aTHX);
776 assert (!next->cctx->inuse);
777 next->cctx->inuse = 1;
778 }
779 1386
780 if (prev__cctx != next->cctx) 1387 if (expect_false (prev__cctx != next->cctx))
781 { 1388 {
782 prev__cctx->top_env = PL_top_env; 1389 prev__cctx->top_env = PL_top_env;
783 PL_top_env = next->cctx->top_env; 1390 PL_top_env = next->cctx->top_env;
784 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
785 } 1392 }
786 1393
787 free_coro_mortal (); 1394 transfer_tail (aTHX);
788
789 UNLOCK;
790 } 1395 }
791} 1396}
792 1397
793struct transfer_args 1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
794{
795 struct coro *prev, *next;
796};
797
798#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
799 1400
1401/** high level stuff ********************************************************/
1402
800static void 1403static int
801coro_state_destroy (struct coro *coro) 1404coro_state_destroy (pTHX_ struct coro *coro)
802{ 1405{
803 if (coro->refcnt--) 1406 if (coro->flags & CF_DESTROYED)
804 return; 1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
1414 if (coro->flags & CF_READY)
1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
805 1422
806 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
807 { 1424 {
808 struct coro temp; 1425 struct coro temp;
809 Zero (&temp, 1, struct coro);
810 temp.save = CORO_SAVE_ALL;
811 1426
812 if (coro->flags & CF_RUNNING) 1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
813 croak ("FATAL: tried to destroy currently running coroutine");
814 1428
815 save_perl (&temp); 1429 save_perl (aTHX_ &temp);
816 load_perl (coro); 1430 load_perl (aTHX_ coro);
817 1431
818 coro_destroy_stacks (); 1432 coro_destruct (aTHX_ coro);
819 1433
820 load_perl (&temp); /* this will get rid of defsv etc.. */ 1434 load_perl (aTHX_ &temp);
821 1435
822 coro->mainstack = 0; 1436 coro->slot = 0;
823 } 1437 }
824 1438
825 cctx_destroy (coro->cctx); 1439 cctx_destroy (coro->cctx);
826 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
827 Safefree (coro); 1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
828} 1447}
829 1448
830static int 1449static int
831coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
832{ 1451{
833 struct coro *coro = (struct coro *)mg->mg_ptr; 1452 struct coro *coro = (struct coro *)mg->mg_ptr;
834 mg->mg_ptr = 0; 1453 mg->mg_ptr = 0;
835 1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
836 coro_state_destroy (coro); 1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
837 1462
838 return 0; 1463 return 0;
839} 1464}
840 1465
841static int 1466static int
… …
848 return 0; 1473 return 0;
849} 1474}
850 1475
851static MGVTBL coro_state_vtbl = { 1476static MGVTBL coro_state_vtbl = {
852 0, 0, 0, 0, 1477 0, 0, 0, 0,
853 coro_state_clear, 1478 coro_state_free,
854 0, 1479 0,
855#ifdef MGf_DUP 1480#ifdef MGf_DUP
856 coro_state_dup, 1481 coro_state_dup,
857#else 1482#else
858# define MGf_DUP 0 1483# define MGf_DUP 0
859#endif 1484#endif
860}; 1485};
861 1486
862static struct coro *
863SvSTATE (SV *coro)
864{
865 HV *stash;
866 MAGIC *mg;
867
868 if (SvROK (coro))
869 coro = SvRV (coro);
870
871 stash = SvSTASH (coro);
872 if (stash != coro_stash && stash != coro_state_stash)
873 {
874 /* very slow, but rare, check */
875 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
876 croak ("Coro::State object required");
877 }
878
879 mg = SvMAGIC (coro);
880 assert (mg->mg_type == PERL_MAGIC_ext);
881 return (struct coro *)mg->mg_ptr;
882}
883
884static void 1487static void
885prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
886{ 1489{
887 ta->prev = SvSTATE (prev_sv); 1490 ta->prev = SvSTATE (prev_sv);
888 ta->next = SvSTATE (next_sv); 1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
889} 1493}
890 1494
891static void 1495static void
892api_transfer (SV *prev_sv, SV *next_sv) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
893{ 1497{
894 struct transfer_args ta; 1498 struct coro_transfer_args ta;
895 1499
896 prepare_transfer (&ta, prev_sv, next_sv); 1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
897 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);
1525}
1526
1527/** Coro ********************************************************************/
1528
1529INLINE void
1530coro_enq (pTHX_ struct coro *coro)
1531{
1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1533}
1534
1535INLINE SV *
1536coro_deq (pTHX)
1537{
1538 int prio;
1539
1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1541 if (AvFILLp (coro_ready [prio]) >= 0)
1542 return av_shift (coro_ready [prio]);
1543
1544 return 0;
898} 1545}
899 1546
900static int 1547static int
901api_save (SV *coro_sv, int new_save)
902{
903 struct coro *coro = SvSTATE (coro_sv);
904 int old_save = coro->save;
905
906 if (new_save >= 0)
907 coro->save = new_save;
908
909 return old_save;
910}
911
912/** Coro ********************************************************************/
913
914#define PRIO_MAX 3
915#define PRIO_HIGH 1
916#define PRIO_NORMAL 0
917#define PRIO_LOW -1
918#define PRIO_IDLE -3
919#define PRIO_MIN -4
920
921/* for Coro.pm */
922static SV *coro_current;
923static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
924static int coro_nready;
925
926static void
927coro_enq (SV *coro_sv)
928{
929 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
930 coro_nready++;
931}
932
933static SV *
934coro_deq (int min_prio)
935{
936 int prio = PRIO_MAX - PRIO_MIN;
937
938 min_prio -= PRIO_MIN;
939 if (min_prio < 0)
940 min_prio = 0;
941
942 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
943 if (AvFILLp (coro_ready [prio]) >= 0)
944 {
945 coro_nready--;
946 return av_shift (coro_ready [prio]);
947 }
948
949 return 0;
950}
951
952static int
953api_ready (SV *coro_sv) 1548api_ready (pTHX_ SV *coro_sv)
954{ 1549{
955 struct coro *coro; 1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
956 1553
957 if (SvROK (coro_sv)) 1554 if (SvROK (coro_sv))
958 coro_sv = SvRV (coro_sv); 1555 coro_sv = SvRV (coro_sv);
959 1556
960 coro = SvSTATE (coro_sv); 1557 coro = SvSTATE (coro_sv);
… …
962 if (coro->flags & CF_READY) 1559 if (coro->flags & CF_READY)
963 return 0; 1560 return 0;
964 1561
965 coro->flags |= CF_READY; 1562 coro->flags |= CF_READY;
966 1563
967 LOCK; 1564 sv_hook = coro_nready ? 0 : coro_readyhook;
968 coro_enq (SvREFCNT_inc (coro_sv)); 1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
969 UNLOCK; 1566
1567 coro_enq (aTHX_ coro);
1568 ++coro_nready;
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 ();
970 1587
971 return 1; 1588 return 1;
972} 1589}
973 1590
974static int 1591static int
975api_is_ready (SV *coro_sv) 1592api_is_ready (pTHX_ SV *coro_sv)
976{ 1593{
977 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
978} 1595}
979 1596
980static void 1597INLINE void
981prepare_schedule (struct transfer_args *ta) 1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
982{ 1599{
983 SV *prev, *next; 1600 SV *prev_sv, *next_sv;
984 1601
985 for (;;) 1602 for (;;)
986 { 1603 {
987 LOCK;
988 next = coro_deq (PRIO_MIN); 1604 next_sv = coro_deq (aTHX);
989 UNLOCK;
990 1605
991 if (next) 1606 /* nothing to schedule: call the idle handler */
992 break; 1607 if (expect_false (!next_sv))
993
994 { 1608 {
995 dSP; 1609 dSP;
996 1610
997 ENTER; 1611 ENTER;
998 SAVETMPS; 1612 SAVETMPS;
999 1613
1000 PUSHMARK (SP); 1614 PUSHMARK (SP);
1001 PUTBACK; 1615 PUTBACK;
1002 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1003 1617
1004 FREETMPS; 1618 FREETMPS;
1005 LEAVE; 1619 LEAVE;
1620 continue;
1006 } 1621 }
1007 }
1008 1622
1009 prev = SvRV (coro_current); 1623 ta->next = SvSTATE_hv (next_sv);
1010 SvRV_set (coro_current, next); 1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 break;
1635 }
1011 1636
1012 /* free this only after the transfer */ 1637 /* free this only after the transfer */
1013 LOCK; 1638 prev_sv = SvRV (coro_current);
1014 free_coro_mortal ();
1015 UNLOCK;
1016 coro_mortal = prev;
1017
1018 assert (!SvROK(prev));//D
1019 assert (!SvROK(next));//D
1020
1021 ta->prev = SvSTATE (prev); 1639 ta->prev = SvSTATE_hv (prev_sv);
1022 ta->next = SvSTATE (next); 1640 TRANSFER_CHECK (*ta);
1023 1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1024 assert (ta->next->flags & CF_READY);
1025 ta->next->flags &= ~CF_READY; 1642 ta->next->flags &= ~CF_READY;
1026} 1643 SvRV_set (coro_current, next_sv);
1027 1644
1028static void 1645 free_coro_mortal (aTHX);
1646 coro_mortal = prev_sv;
1647}
1648
1649INLINE void
1029prepare_cede (struct transfer_args *ta) 1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1030{ 1651{
1031 api_ready (coro_current); 1652 api_ready (aTHX_ coro_current);
1032 prepare_schedule (ta); 1653 prepare_schedule (aTHX_ ta);
1654}
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);
1033} 1677}
1034 1678
1035static int 1679static int
1036prepare_cede_notself (struct transfer_args *ta) 1680api_cede (pTHX)
1037{ 1681{
1038 if (coro_nready) 1682 struct coro_transfer_args ta;
1683
1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1039 { 1687 {
1040 SV *prev = SvRV (coro_current); 1688 TRANSFER (ta, 1);
1041 prepare_schedule (ta);
1042 api_ready (prev);
1043 return 1; 1689 return 1;
1044 } 1690 }
1045 else 1691 else
1046 return 0; 1692 return 0;
1047} 1693}
1048 1694
1049static void
1050api_schedule (void)
1051{
1052 struct transfer_args ta;
1053
1054 prepare_schedule (&ta);
1055 TRANSFER (ta);
1056}
1057
1058static int 1695static int
1059api_cede (void) 1696api_cede_notself (pTHX)
1060{ 1697{
1698 if (coro_nready)
1699 {
1061 struct transfer_args ta; 1700 struct coro_transfer_args ta;
1062 1701
1063 prepare_cede (&ta); 1702 prepare_cede_notself (aTHX_ &ta);
1064
1065 if (ta.prev != ta.next)
1066 {
1067 TRANSFER (ta); 1703 TRANSFER (ta, 1);
1068 return 1; 1704 return 1;
1069 } 1705 }
1070 else 1706 else
1071 return 0; 1707 return 0;
1072} 1708}
1073 1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
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)
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 while (items--)
1758 av_store (av, items, SvREFCNT_inc_NN (ST (items)));
1759 }
1760
1761 XSRETURN_EMPTY;
1762}
1763
1074static int 1764static int
1075api_cede_notself (void) 1765slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1076{ 1766{
1767 SV *data = (SV *)frame->data;
1768
1769 if (CORO_THROW)
1770 return 0;
1771
1772 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1773 return 1;
1774
1775 /* now push all results on the stack */
1776 {
1777 dSP;
1778 AV *av = (AV *)SvRV (data);
1779 int i;
1780
1781 EXTEND (SP, AvFILLp (av) + 1);
1782 for (i = 0; i <= AvFILLp (av); ++i)
1783 PUSHs (AvARRAY (av)[i]);
1784
1785 PUTBACK;
1786 }
1787
1788 return 0;
1789}
1790
1791static void
1792slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1793{
1794 SV *cb;
1795
1796 if (items)
1797 cb = arg [0];
1798 else
1799 {
1800 struct coro *coro = SvSTATE_current;
1801
1802 if (!coro->rouse_cb)
1803 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1804
1805 cb = sv_2mortal (coro->rouse_cb);
1806 coro->rouse_cb = 0;
1807 }
1808
1809 if (!SvROK (cb)
1810 || SvTYPE (SvRV (cb)) != SVt_PVCV
1811 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1812 croak ("Coro::rouse_wait called with illegal callback argument,");
1813
1814 {
1815 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1816 SV *data = (SV *)GENSUB_ARG;
1817
1818 frame->data = (void *)data;
1819 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1820 frame->check = slf_check_rouse_wait;
1821 }
1822}
1823
1824static SV *
1825coro_new_rouse_cb (pTHX)
1826{
1827 HV *hv = (HV *)SvRV (coro_current);
1828 struct coro *coro = SvSTATE_hv (hv);
1829 SV *data = newRV_inc ((SV *)hv);
1830 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1831
1832 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1833
1834 SvREFCNT_dec (coro->rouse_cb);
1835 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1836
1837 return cb;
1838}
1839
1840/*****************************************************************************/
1841/* schedule-like-function opcode (SLF) */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static const CV *slf_cv;
1845static SV **slf_argv;
1846static int slf_argc, slf_arga; /* count, allocated */
1847static I32 slf_ax; /* top of stack, for restore */
1848
1849/* this restores the stack in the case we patched the entersub, to */
1850/* recreate the stack frame as perl will on following calls */
1851/* since entersub cleared the stack */
1852static OP *
1853pp_restore (pTHX)
1854{
1855 int i;
1856 SV **SP = PL_stack_base + slf_ax;
1857
1858 PUSHMARK (SP);
1859
1860 EXTEND (SP, slf_argc + 1);
1861
1862 for (i = 0; i < slf_argc; ++i)
1863 PUSHs (sv_2mortal (slf_argv [i]));
1864
1865 PUSHs ((SV *)CvGV (slf_cv));
1866
1867 RETURNOP (slf_restore.op_first);
1868}
1869
1870static void
1871slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1872{
1873 SV **arg = (SV **)slf_frame.data;
1874
1875 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1876}
1877
1878static void
1879slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1880{
1881 if (items != 2)
1882 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1883
1884 frame->prepare = slf_prepare_transfer;
1885 frame->check = slf_check_nop;
1886 frame->data = (void *)arg; /* let's hope it will stay valid */
1887}
1888
1889static void
1890slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1891{
1892 frame->prepare = prepare_schedule;
1893 frame->check = slf_check_nop;
1894}
1895
1896static void
1897slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1898{
1899 frame->prepare = prepare_cede;
1900 frame->check = slf_check_nop;
1901}
1902
1903static void
1904slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1905{
1906 frame->prepare = prepare_cede_notself;
1907 frame->check = slf_check_nop;
1908}
1909
1910/*
1911 * these not obviously related functions are all rolled into one
1912 * function to increase chances that they all will call transfer with the same
1913 * stack offset
1914 * SLF stands for "schedule-like-function".
1915 */
1916static OP *
1917pp_slf (pTHX)
1918{
1919 I32 checkmark; /* mark SP to see how many elements check has pushed */
1920
1921 /* set up the slf frame, unless it has already been set-up */
1922 /* the latter happens when a new coro has been started */
1923 /* or when a new cctx was attached to an existing coroutine */
1924 if (expect_true (!slf_frame.prepare))
1925 {
1926 /* first iteration */
1927 dSP;
1928 SV **arg = PL_stack_base + TOPMARK + 1;
1929 int items = SP - arg; /* args without function object */
1930 SV *gv = *sp;
1931
1932 /* do a quick consistency check on the "function" object, and if it isn't */
1933 /* for us, divert to the real entersub */
1934 if (SvTYPE (gv) != SVt_PVGV
1935 || !GvCV (gv)
1936 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1937 return PL_ppaddr[OP_ENTERSUB](aTHX);
1938
1939 if (!(PL_op->op_flags & OPf_STACKED))
1940 {
1941 /* ampersand-form of call, use @_ instead of stack */
1942 AV *av = GvAV (PL_defgv);
1943 arg = AvARRAY (av);
1944 items = AvFILLp (av) + 1;
1945 }
1946
1947 /* now call the init function, which needs to set up slf_frame */
1948 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1949 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1950
1951 /* pop args */
1952 SP = PL_stack_base + POPMARK;
1953
1954 PUTBACK;
1955 }
1956
1957 /* now that we have a slf_frame, interpret it! */
1958 /* we use a callback system not to make the code needlessly */
1959 /* complicated, but so we can run multiple perl coros from one cctx */
1960
1961 do
1962 {
1077 struct transfer_args ta; 1963 struct coro_transfer_args ta;
1078 1964
1079 if (prepare_cede_notself (&ta)) 1965 slf_frame.prepare (aTHX_ &ta);
1080 {
1081 TRANSFER (ta); 1966 TRANSFER (ta, 0);
1967
1968 checkmark = PL_stack_sp - PL_stack_base;
1969 }
1970 while (slf_frame.check (aTHX_ &slf_frame));
1971
1972 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1973
1974 /* exception handling */
1975 if (expect_false (CORO_THROW))
1976 {
1977 SV *exception = sv_2mortal (CORO_THROW);
1978
1979 CORO_THROW = 0;
1980 sv_setsv (ERRSV, exception);
1981 croak (0);
1982 }
1983
1984 /* return value handling - mostly like entersub */
1985 /* make sure we put something on the stack in scalar context */
1986 if (GIMME_V == G_SCALAR)
1987 {
1988 dSP;
1989 SV **bot = PL_stack_base + checkmark;
1990
1991 if (sp == bot) /* too few, push undef */
1992 bot [1] = &PL_sv_undef;
1993 else if (sp != bot + 1) /* too many, take last one */
1994 bot [1] = *sp;
1995
1996 SP = bot + 1;
1997
1998 PUTBACK;
1999 }
2000
2001 return NORMAL;
2002}
2003
2004static void
2005api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2006{
2007 int i;
2008 SV **arg = PL_stack_base + ax;
2009 int items = PL_stack_sp - arg + 1;
2010
2011 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2012
2013 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2014 && PL_op->op_ppaddr != pp_slf)
2015 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2016
2017 CvFLAGS (cv) |= CVf_SLF;
2018 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2019 slf_cv = cv;
2020
2021 /* we patch the op, and then re-run the whole call */
2022 /* we have to put the same argument on the stack for this to work */
2023 /* and this will be done by pp_restore */
2024 slf_restore.op_next = (OP *)&slf_restore;
2025 slf_restore.op_type = OP_CUSTOM;
2026 slf_restore.op_ppaddr = pp_restore;
2027 slf_restore.op_first = PL_op;
2028
2029 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2030
2031 if (PL_op->op_flags & OPf_STACKED)
2032 {
2033 if (items > slf_arga)
2034 {
2035 slf_arga = items;
2036 free (slf_argv);
2037 slf_argv = malloc (slf_arga * sizeof (SV *));
2038 }
2039
2040 slf_argc = items;
2041
2042 for (i = 0; i < items; ++i)
2043 slf_argv [i] = SvREFCNT_inc (arg [i]);
2044 }
2045 else
2046 slf_argc = 0;
2047
2048 PL_op->op_ppaddr = pp_slf;
2049 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2050
2051 PL_op = (OP *)&slf_restore;
2052}
2053
2054/*****************************************************************************/
2055/* PerlIO::cede */
2056
2057typedef struct
2058{
2059 PerlIOBuf base;
2060 NV next, every;
2061} PerlIOCede;
2062
2063static IV
2064PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2065{
2066 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2067
2068 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2069 self->next = nvtime () + self->every;
2070
2071 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2072}
2073
2074static SV *
2075PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2076{
2077 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2078
2079 return newSVnv (self->every);
2080}
2081
2082static IV
2083PerlIOCede_flush (pTHX_ PerlIO *f)
2084{
2085 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2086 double now = nvtime ();
2087
2088 if (now >= self->next)
2089 {
2090 api_cede (aTHX);
2091 self->next = now + self->every;
2092 }
2093
2094 return PerlIOBuf_flush (aTHX_ f);
2095}
2096
2097static PerlIO_funcs PerlIO_cede =
2098{
2099 sizeof(PerlIO_funcs),
2100 "cede",
2101 sizeof(PerlIOCede),
2102 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2103 PerlIOCede_pushed,
2104 PerlIOBuf_popped,
2105 PerlIOBuf_open,
2106 PerlIOBase_binmode,
2107 PerlIOCede_getarg,
2108 PerlIOBase_fileno,
2109 PerlIOBuf_dup,
2110 PerlIOBuf_read,
2111 PerlIOBuf_unread,
2112 PerlIOBuf_write,
2113 PerlIOBuf_seek,
2114 PerlIOBuf_tell,
2115 PerlIOBuf_close,
2116 PerlIOCede_flush,
2117 PerlIOBuf_fill,
2118 PerlIOBase_eof,
2119 PerlIOBase_error,
2120 PerlIOBase_clearerr,
2121 PerlIOBase_setlinebuf,
2122 PerlIOBuf_get_base,
2123 PerlIOBuf_bufsiz,
2124 PerlIOBuf_get_ptr,
2125 PerlIOBuf_get_cnt,
2126 PerlIOBuf_set_ptrcnt,
2127};
2128
2129/*****************************************************************************/
2130/* Coro::Semaphore & Coro::Signal */
2131
2132static SV *
2133coro_waitarray_new (pTHX_ int count)
2134{
2135 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2136 AV *av = newAV ();
2137 SV **ary;
2138
2139 /* unfortunately, building manually saves memory */
2140 Newx (ary, 2, SV *);
2141 AvALLOC (av) = ary;
2142 AvARRAY (av) = ary;
2143 AvMAX (av) = 1;
2144 AvFILLp (av) = 0;
2145 ary [0] = newSViv (count);
2146
2147 return newRV_noinc ((SV *)av);
2148}
2149
2150/* semaphore */
2151
2152static void
2153coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2154{
2155 SV *count_sv = AvARRAY (av)[0];
2156 IV count = SvIVX (count_sv);
2157
2158 count += adjust;
2159 SvIVX (count_sv) = count;
2160
2161 /* now wake up as many waiters as are expected to lock */
2162 while (count > 0 && AvFILLp (av) > 0)
2163 {
2164 SV *cb;
2165
2166 /* swap first two elements so we can shift a waiter */
2167 AvARRAY (av)[0] = AvARRAY (av)[1];
2168 AvARRAY (av)[1] = count_sv;
2169 cb = av_shift (av);
2170
2171 if (SvOBJECT (cb))
2172 api_ready (aTHX_ cb);
2173 else
2174 croak ("callbacks not yet supported");
2175
2176 SvREFCNT_dec (cb);
2177
2178 --count;
2179 }
2180}
2181
2182static void
2183coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2184{
2185 /* call $sem->adjust (0) to possibly wake up some other waiters */
2186 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2187}
2188
2189static int
2190slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2191{
2192 AV *av = (AV *)frame->data;
2193 SV *count_sv = AvARRAY (av)[0];
2194
2195 /* if we are about to throw, don't actually acquire the lock, just throw */
2196 if (CORO_THROW)
2197 return 0;
2198 else if (SvIVX (count_sv) > 0)
2199 {
2200 SvSTATE_current->on_destroy = 0;
2201
2202 if (acquire)
2203 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2204 else
2205 coro_semaphore_adjust (aTHX_ av, 0);
2206
2207 return 0;
2208 }
2209 else
2210 {
2211 int i;
2212 /* if we were woken up but can't down, we look through the whole */
2213 /* waiters list and only add us if we aren't in there already */
2214 /* this avoids some degenerate memory usage cases */
2215
2216 for (i = 1; i <= AvFILLp (av); ++i)
2217 if (AvARRAY (av)[i] == SvRV (coro_current))
2218 return 1;
2219
2220 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
1082 return 1; 2221 return 1;
1083 } 2222 }
2223}
2224
2225static int
2226slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2227{
2228 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2229}
2230
2231static int
2232slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2235}
2236
2237static void
2238slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 AV *av = (AV *)SvRV (arg [0]);
2241
2242 if (SvIVX (AvARRAY (av)[0]) > 0)
2243 {
2244 frame->data = (void *)av;
2245 frame->prepare = prepare_nop;
2246 }
1084 else 2247 else
2248 {
2249 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2250
2251 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2252 frame->prepare = prepare_schedule;
2253
2254 /* to avoid race conditions when a woken-up coro gets terminated */
2255 /* we arrange for a temporary on_destroy that calls adjust (0) */
2256 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2257 }
2258}
2259
2260static void
2261slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2262{
2263 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2264 frame->check = slf_check_semaphore_down;
2265}
2266
2267static void
2268slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2271 frame->check = slf_check_semaphore_wait;
2272}
2273
2274/* signal */
2275
2276static void
2277coro_signal_wake (pTHX_ AV *av, int count)
2278{
2279 SvIVX (AvARRAY (av)[0]) = 0;
2280
2281 /* now signal count waiters */
2282 while (count > 0 && AvFILLp (av) > 0)
2283 {
2284 SV *cb;
2285
2286 /* swap first two elements so we can shift a waiter */
2287 cb = AvARRAY (av)[0];
2288 AvARRAY (av)[0] = AvARRAY (av)[1];
2289 AvARRAY (av)[1] = cb;
2290
2291 cb = av_shift (av);
2292
2293 api_ready (aTHX_ cb);
2294 sv_setiv (cb, 0); /* signal waiter */
2295 SvREFCNT_dec (cb);
2296
2297 --count;
2298 }
2299}
2300
2301static int
2302slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2303{
2304 /* if we are about to throw, also stop waiting */
2305 return SvROK ((SV *)frame->data) && !CORO_THROW;
2306}
2307
2308static void
2309slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2310{
2311 AV *av = (AV *)SvRV (arg [0]);
2312
2313 if (SvIVX (AvARRAY (av)[0]))
2314 {
2315 SvIVX (AvARRAY (av)[0]) = 0;
2316 frame->prepare = prepare_nop;
2317 frame->check = slf_check_nop;
2318 }
2319 else
2320 {
2321 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2322
2323 av_push (av, waiter);
2324
2325 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2326 frame->prepare = prepare_schedule;
2327 frame->check = slf_check_signal_wait;
2328 }
2329}
2330
2331/*****************************************************************************/
2332/* Coro::AIO */
2333
2334#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2335
2336/* helper storage struct */
2337struct io_state
2338{
2339 int errorno;
2340 I32 laststype; /* U16 in 5.10.0 */
2341 int laststatval;
2342 Stat_t statcache;
2343};
2344
2345static void
2346coro_aio_callback (pTHX_ CV *cv)
2347{
2348 dXSARGS;
2349 AV *state = (AV *)GENSUB_ARG;
2350 SV *coro = av_pop (state);
2351 SV *data_sv = newSV (sizeof (struct io_state));
2352
2353 av_extend (state, items);
2354
2355 sv_upgrade (data_sv, SVt_PV);
2356 SvCUR_set (data_sv, sizeof (struct io_state));
2357 SvPOK_only (data_sv);
2358
2359 {
2360 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2361
2362 data->errorno = errno;
2363 data->laststype = PL_laststype;
2364 data->laststatval = PL_laststatval;
2365 data->statcache = PL_statcache;
2366 }
2367
2368 /* now build the result vector out of all the parameters and the data_sv */
2369 {
2370 int i;
2371
2372 for (i = 0; i < items; ++i)
2373 av_push (state, SvREFCNT_inc_NN (ST (i)));
2374 }
2375
2376 av_push (state, data_sv);
2377
2378 api_ready (aTHX_ coro);
2379 SvREFCNT_dec (coro);
2380 SvREFCNT_dec ((AV *)state);
2381}
2382
2383static int
2384slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2385{
2386 AV *state = (AV *)frame->data;
2387
2388 /* if we are about to throw, return early */
2389 /* this does not cancel the aio request, but at least */
2390 /* it quickly returns */
2391 if (CORO_THROW)
1085 return 0; 2392 return 0;
1086}
1087 2393
2394 /* one element that is an RV? repeat! */
2395 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2396 return 1;
2397
2398 /* restore status */
2399 {
2400 SV *data_sv = av_pop (state);
2401 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2402
2403 errno = data->errorno;
2404 PL_laststype = data->laststype;
2405 PL_laststatval = data->laststatval;
2406 PL_statcache = data->statcache;
2407
2408 SvREFCNT_dec (data_sv);
2409 }
2410
2411 /* push result values */
2412 {
2413 dSP;
2414 int i;
2415
2416 EXTEND (SP, AvFILLp (state) + 1);
2417 for (i = 0; i <= AvFILLp (state); ++i)
2418 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2430 SV *coro_hv = SvRV (coro_current);
2431 struct coro *coro = SvSTATE_hv (coro_hv);
2432
2433 /* put our coroutine id on the state arg */
2434 av_push (state, SvREFCNT_inc_NN (coro_hv));
2435
2436 /* first see whether we have a non-zero priority and set it as AIO prio */
2437 if (coro->prio)
2438 {
2439 dSP;
2440
2441 static SV *prio_cv;
2442 static SV *prio_sv;
2443
2444 if (expect_false (!prio_cv))
2445 {
2446 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2447 prio_sv = newSViv (0);
2448 }
2449
2450 PUSHMARK (SP);
2451 sv_setiv (prio_sv, coro->prio);
2452 XPUSHs (prio_sv);
2453
2454 PUTBACK;
2455 call_sv (prio_cv, G_VOID | G_DISCARD);
2456 }
2457
2458 /* now call the original request */
2459 {
2460 dSP;
2461 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2462 int i;
2463
2464 PUSHMARK (SP);
2465
2466 /* first push all args to the stack */
2467 EXTEND (SP, items + 1);
2468
2469 for (i = 0; i < items; ++i)
2470 PUSHs (arg [i]);
2471
2472 /* now push the callback closure */
2473 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2474
2475 /* now call the AIO function - we assume our request is uncancelable */
2476 PUTBACK;
2477 call_sv ((SV *)req, G_VOID | G_DISCARD);
2478 }
2479
2480 /* now that the requets is going, we loop toll we have a result */
2481 frame->data = (void *)state;
2482 frame->prepare = prepare_schedule;
2483 frame->check = slf_check_aio_req;
2484}
2485
2486static void
2487coro_aio_req_xs (pTHX_ CV *cv)
2488{
2489 dXSARGS;
2490
2491 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2492
2493 XSRETURN_EMPTY;
2494}
2495
2496/*****************************************************************************/
2497
1088MODULE = Coro::State PACKAGE = Coro::State 2498MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1089 2499
1090PROTOTYPES: DISABLE 2500PROTOTYPES: DISABLE
1091 2501
1092BOOT: 2502BOOT:
1093{ 2503{
1094#ifdef USE_ITHREADS 2504#ifdef USE_ITHREADS
1095 MUTEX_INIT (&coro_mutex); 2505# if CORO_PTHREAD
2506 coro_thx = PERL_GET_CONTEXT;
2507# endif
1096#endif 2508#endif
1097 BOOT_PAGESIZE; 2509 BOOT_PAGESIZE;
1098 2510
2511 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2512 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2513
2514 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2515 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2516 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2517
2518 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2519 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2520 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2521
1099 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2522 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1100 2523
2524 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2525 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1101 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2526 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1102 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1103 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1104 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1105 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2527 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1106 2528
1107 main_mainstack = PL_mainstack; 2529 main_mainstack = PL_mainstack;
2530 main_top_env = PL_top_env;
1108 2531
2532 while (main_top_env->je_prev)
2533 main_top_env = main_top_env->je_prev;
2534
2535 {
2536 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2537
2538 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2539 hv_store_ent (PL_custom_op_names, slf,
2540 newSVpv ("coro_slf", 0), 0);
2541
2542 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2543 hv_store_ent (PL_custom_op_descs, slf,
2544 newSVpv ("coro schedule like function", 0), 0);
2545 }
2546
1109 coroapi.ver = CORO_API_VERSION; 2547 coroapi.ver = CORO_API_VERSION;
2548 coroapi.rev = CORO_API_REVISION;
2549
1110 coroapi.transfer = api_transfer; 2550 coroapi.transfer = api_transfer;
2551
2552 coroapi.sv_state = SvSTATE_;
2553 coroapi.execute_slf = api_execute_slf;
2554 coroapi.prepare_nop = prepare_nop;
2555 coroapi.prepare_schedule = prepare_schedule;
2556 coroapi.prepare_cede = prepare_cede;
2557 coroapi.prepare_cede_notself = prepare_cede_notself;
2558
2559 {
2560 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2561
2562 if (!svp) croak ("Time::HiRes is required");
2563 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2564
2565 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2566 }
1111 2567
1112 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2568 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1113} 2569}
1114 2570
1115SV * 2571SV *
1116new (char *klass, ...) 2572new (char *klass, ...)
1117 CODE: 2573 CODE:
1118{ 2574{
1119 struct coro *coro; 2575 struct coro *coro;
2576 MAGIC *mg;
1120 HV *hv; 2577 HV *hv;
1121 int i; 2578 int i;
1122 2579
1123 Newz (0, coro, 1, struct coro); 2580 Newz (0, coro, 1, struct coro);
1124 coro->args = newAV (); 2581 coro->args = newAV ();
1125 coro->save = CORO_SAVE_ALL;
1126 coro->flags = CF_NEW; 2582 coro->flags = CF_NEW;
1127 2583
2584 if (coro_first) coro_first->prev = coro;
2585 coro->next = coro_first;
2586 coro_first = coro;
2587
1128 hv = newHV (); 2588 coro->hv = hv = newHV ();
1129 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2589 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2590 mg->mg_flags |= MGf_DUP;
1130 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2591 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1131 2592
2593 av_extend (coro->args, items - 1);
1132 for (i = 1; i < items; i++) 2594 for (i = 1; i < items; i++)
1133 av_push (coro->args, newSVsv (ST (i))); 2595 av_push (coro->args, newSVsv (ST (i)));
1134} 2596}
1135 OUTPUT: 2597 OUTPUT:
1136 RETVAL 2598 RETVAL
1137 2599
1138int 2600void
1139save (SV *coro, int new_save = -1) 2601transfer (...)
2602 PROTOTYPE: $$
1140 CODE: 2603 CODE:
1141 RETVAL = api_save (coro, new_save); 2604 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2605
2606bool
2607_destroy (SV *coro_sv)
2608 CODE:
2609 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142 OUTPUT: 2610 OUTPUT:
1143 RETVAL 2611 RETVAL
1144 2612
1145void 2613void
1146_set_stacklevel (...)
1147 ALIAS:
1148 Coro::State::transfer = 1
1149 Coro::schedule = 2
1150 Coro::cede = 3
1151 Coro::cede_notself = 4
1152 CODE:
1153{
1154 struct transfer_args ta;
1155
1156 switch (ix)
1157 {
1158 case 0:
1159 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1160 ta.next = 0;
1161 break;
1162
1163 case 1:
1164 if (items != 2)
1165 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1166
1167 prepare_transfer (&ta, ST (0), ST (1));
1168 break;
1169
1170 case 2:
1171 prepare_schedule (&ta);
1172 break;
1173
1174 case 3:
1175 prepare_cede (&ta);
1176 break;
1177
1178 case 4:
1179 if (!prepare_cede_notself (&ta))
1180 XSRETURN_EMPTY;
1181
1182 break;
1183 }
1184
1185 BARRIER;
1186 TRANSFER (ta);
1187}
1188
1189void
1190_clone_state_from (SV *dst, SV *src)
1191 CODE:
1192{
1193 struct coro *coro_src = SvSTATE (src);
1194
1195 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1196
1197 ++coro_src->refcnt;
1198 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1199}
1200
1201void
1202_exit (code) 2614_exit (int code)
1203 int code
1204 PROTOTYPE: $ 2615 PROTOTYPE: $
1205 CODE: 2616 CODE:
1206 _exit (code); 2617 _exit (code);
1207 2618
1208int 2619int
2620cctx_stacksize (int new_stacksize = 0)
2621 PROTOTYPE: ;$
2622 CODE:
2623 RETVAL = cctx_stacksize;
2624 if (new_stacksize)
2625 {
2626 cctx_stacksize = new_stacksize;
2627 ++cctx_gen;
2628 }
2629 OUTPUT:
2630 RETVAL
2631
2632int
2633cctx_max_idle (int max_idle = 0)
2634 PROTOTYPE: ;$
2635 CODE:
2636 RETVAL = cctx_max_idle;
2637 if (max_idle > 1)
2638 cctx_max_idle = max_idle;
2639 OUTPUT:
2640 RETVAL
2641
2642int
1209cctx_count () 2643cctx_count ()
2644 PROTOTYPE:
1210 CODE: 2645 CODE:
1211 RETVAL = cctx_count; 2646 RETVAL = cctx_count;
1212 OUTPUT: 2647 OUTPUT:
1213 RETVAL 2648 RETVAL
1214 2649
1215int 2650int
1216cctx_idle () 2651cctx_idle ()
2652 PROTOTYPE:
1217 CODE: 2653 CODE:
1218 RETVAL = cctx_idle; 2654 RETVAL = cctx_idle;
1219 OUTPUT: 2655 OUTPUT:
1220 RETVAL 2656 RETVAL
1221 2657
2658void
2659list ()
2660 PROTOTYPE:
2661 PPCODE:
2662{
2663 struct coro *coro;
2664 for (coro = coro_first; coro; coro = coro->next)
2665 if (coro->hv)
2666 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2667}
2668
2669void
2670call (Coro::State coro, SV *coderef)
2671 ALIAS:
2672 eval = 1
2673 CODE:
2674{
2675 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2676 {
2677 struct coro temp;
2678
2679 if (!(coro->flags & CF_RUNNING))
2680 {
2681 PUTBACK;
2682 save_perl (aTHX_ &temp);
2683 load_perl (aTHX_ coro);
2684 }
2685
2686 {
2687 dSP;
2688 ENTER;
2689 SAVETMPS;
2690 PUTBACK;
2691 PUSHSTACK;
2692 PUSHMARK (SP);
2693
2694 if (ix)
2695 eval_sv (coderef, 0);
2696 else
2697 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2698
2699 POPSTACK;
2700 SPAGAIN;
2701 FREETMPS;
2702 LEAVE;
2703 PUTBACK;
2704 }
2705
2706 if (!(coro->flags & CF_RUNNING))
2707 {
2708 save_perl (aTHX_ coro);
2709 load_perl (aTHX_ &temp);
2710 SPAGAIN;
2711 }
2712 }
2713}
2714
2715SV *
2716is_ready (Coro::State coro)
2717 PROTOTYPE: $
2718 ALIAS:
2719 is_ready = CF_READY
2720 is_running = CF_RUNNING
2721 is_new = CF_NEW
2722 is_destroyed = CF_DESTROYED
2723 CODE:
2724 RETVAL = boolSV (coro->flags & ix);
2725 OUTPUT:
2726 RETVAL
2727
2728void
2729throw (Coro::State self, SV *throw = &PL_sv_undef)
2730 PROTOTYPE: $;$
2731 CODE:
2732{
2733 struct coro *current = SvSTATE_current;
2734 SV **throwp = self == current ? &CORO_THROW : &self->except;
2735 SvREFCNT_dec (*throwp);
2736 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2737}
2738
2739void
2740api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2741 PROTOTYPE: $;$
2742 C_ARGS: aTHX_ coro, flags
2743
2744SV *
2745has_cctx (Coro::State coro)
2746 PROTOTYPE: $
2747 CODE:
2748 RETVAL = boolSV (!!coro->cctx);
2749 OUTPUT:
2750 RETVAL
2751
2752int
2753is_traced (Coro::State coro)
2754 PROTOTYPE: $
2755 CODE:
2756 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2757 OUTPUT:
2758 RETVAL
2759
2760UV
2761rss (Coro::State coro)
2762 PROTOTYPE: $
2763 ALIAS:
2764 usecount = 1
2765 CODE:
2766 switch (ix)
2767 {
2768 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2769 case 1: RETVAL = coro->usecount; break;
2770 }
2771 OUTPUT:
2772 RETVAL
2773
2774void
2775force_cctx ()
2776 PROTOTYPE:
2777 CODE:
2778 SvSTATE_current->cctx->idle_sp = 0;
2779
2780void
2781swap_defsv (Coro::State self)
2782 PROTOTYPE: $
2783 ALIAS:
2784 swap_defav = 1
2785 CODE:
2786 if (!self->slot)
2787 croak ("cannot swap state with coroutine that has no saved state,");
2788 else
2789 {
2790 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2791 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2792
2793 SV *tmp = *src; *src = *dst; *dst = tmp;
2794 }
2795
2796
1222MODULE = Coro::State PACKAGE = Coro 2797MODULE = Coro::State PACKAGE = Coro
1223 2798
1224BOOT: 2799BOOT:
1225{ 2800{
1226 int i; 2801 int i;
1227 2802
2803 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2804 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2805 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2806
2807 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2808 SvREADONLY_on (coro_current);
2809
1228 coro_stash = gv_stashpv ("Coro", TRUE); 2810 coro_stash = gv_stashpv ("Coro", TRUE);
1229 2811
1230 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2812 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1231 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2813 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1232 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2814 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1233 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2815 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1234 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2816 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1235 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2817 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1236 2818
1237 coro_current = get_sv ("Coro::current", FALSE);
1238 SvREADONLY_on (coro_current);
1239
1240 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2819 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1241 coro_ready[i] = newAV (); 2820 coro_ready[i] = newAV ();
1242 2821
1243 { 2822 {
1244 SV *sv = perl_get_sv("Coro::API", 1); 2823 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1245 2824
1246 coroapi.schedule = api_schedule; 2825 coroapi.schedule = api_schedule;
1247 coroapi.save = api_save;
1248 coroapi.cede = api_cede; 2826 coroapi.cede = api_cede;
1249 coroapi.cede_notself = api_cede_notself; 2827 coroapi.cede_notself = api_cede_notself;
1250 coroapi.ready = api_ready; 2828 coroapi.ready = api_ready;
1251 coroapi.is_ready = api_is_ready; 2829 coroapi.is_ready = api_is_ready;
1252 coroapi.nready = &coro_nready; 2830 coroapi.nready = coro_nready;
1253 coroapi.current = coro_current; 2831 coroapi.current = coro_current;
1254 2832
1255 GCoroAPI = &coroapi; 2833 /*GCoroAPI = &coroapi;*/
1256 sv_setiv (sv, (IV)&coroapi); 2834 sv_setiv (sv, (IV)&coroapi);
1257 SvREADONLY_on (sv); 2835 SvREADONLY_on (sv);
1258 } 2836 }
1259} 2837}
2838
2839void
2840schedule (...)
2841 CODE:
2842 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2843
2844void
2845cede (...)
2846 CODE:
2847 CORO_EXECUTE_SLF_XS (slf_init_cede);
2848
2849void
2850cede_notself (...)
2851 CODE:
2852 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1260 2853
1261void 2854void
1262_set_current (SV *current) 2855_set_current (SV *current)
1263 PROTOTYPE: $ 2856 PROTOTYPE: $
1264 CODE: 2857 CODE:
1265 SvREFCNT_dec (SvRV (coro_current)); 2858 SvREFCNT_dec (SvRV (coro_current));
1266 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 2859 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2860
2861void
2862_set_readyhook (SV *hook)
2863 PROTOTYPE: $
2864 CODE:
2865 SvREFCNT_dec (coro_readyhook);
2866 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1267 2867
1268int 2868int
1269prio (Coro::State coro, int newprio = 0) 2869prio (Coro::State coro, int newprio = 0)
2870 PROTOTYPE: $;$
1270 ALIAS: 2871 ALIAS:
1271 nice = 1 2872 nice = 1
1272 CODE: 2873 CODE:
1273{ 2874{
1274 RETVAL = coro->prio; 2875 RETVAL = coro->prio;
… …
1289 2890
1290SV * 2891SV *
1291ready (SV *self) 2892ready (SV *self)
1292 PROTOTYPE: $ 2893 PROTOTYPE: $
1293 CODE: 2894 CODE:
1294 RETVAL = boolSV (api_ready (self)); 2895 RETVAL = boolSV (api_ready (aTHX_ self));
1295 OUTPUT:
1296 RETVAL
1297
1298SV *
1299is_ready (SV *self)
1300 PROTOTYPE: $
1301 CODE:
1302 RETVAL = boolSV (api_is_ready (self));
1303 OUTPUT: 2896 OUTPUT:
1304 RETVAL 2897 RETVAL
1305 2898
1306int 2899int
1307nready (...) 2900nready (...)
… …
1309 CODE: 2902 CODE:
1310 RETVAL = coro_nready; 2903 RETVAL = coro_nready;
1311 OUTPUT: 2904 OUTPUT:
1312 RETVAL 2905 RETVAL
1313 2906
1314MODULE = Coro::State PACKAGE = Coro::AIO 2907# for async_pool speedup
2908void
2909_pool_1 (SV *cb)
2910 CODE:
2911{
2912 HV *hv = (HV *)SvRV (coro_current);
2913 struct coro *coro = SvSTATE_hv ((SV *)hv);
2914 AV *defav = GvAV (PL_defgv);
2915 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2916 AV *invoke_av;
2917 int i, len;
2918
2919 if (!invoke)
2920 {
2921 SV *old = PL_diehook;
2922 PL_diehook = 0;
2923 SvREFCNT_dec (old);
2924 croak ("\3async_pool terminate\2\n");
2925 }
2926
2927 SvREFCNT_dec (coro->saved_deffh);
2928 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2929
2930 hv_store (hv, "desc", sizeof ("desc") - 1,
2931 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2932
2933 invoke_av = (AV *)SvRV (invoke);
2934 len = av_len (invoke_av);
2935
2936 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2937
2938 if (len > 0)
2939 {
2940 av_fill (defav, len - 1);
2941 for (i = 0; i < len; ++i)
2942 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2943 }
2944}
2945
2946void
2947_pool_2 (SV *cb)
2948 CODE:
2949{
2950 HV *hv = (HV *)SvRV (coro_current);
2951 struct coro *coro = SvSTATE_hv ((SV *)hv);
2952
2953 sv_setsv (cb, &PL_sv_undef);
2954
2955 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2956 coro->saved_deffh = 0;
2957
2958 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2959 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2960 {
2961 SV *old = PL_diehook;
2962 PL_diehook = 0;
2963 SvREFCNT_dec (old);
2964 croak ("\3async_pool terminate\2\n");
2965 }
2966
2967 av_clear (GvAV (PL_defgv));
2968 hv_store (hv, "desc", sizeof ("desc") - 1,
2969 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2970
2971 coro->prio = 0;
2972
2973 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2974 api_trace (aTHX_ coro_current, 0);
2975
2976 av_push (av_async_pool, newSVsv (coro_current));
2977}
1315 2978
1316SV * 2979SV *
1317_get_state () 2980rouse_cb ()
2981 PROTOTYPE:
1318 CODE: 2982 CODE:
1319{ 2983 RETVAL = coro_new_rouse_cb (aTHX);
1320 struct io_state *data;
1321
1322 RETVAL = newSV (sizeof (struct io_state));
1323 data = (struct io_state *)SvPVX (RETVAL);
1324 SvCUR_set (RETVAL, sizeof (struct io_state));
1325 SvPOK_only (RETVAL);
1326
1327 data->errorno = errno;
1328 data->laststype = PL_laststype;
1329 data->laststatval = PL_laststatval;
1330 data->statcache = PL_statcache;
1331}
1332 OUTPUT: 2984 OUTPUT:
1333 RETVAL 2985 RETVAL
1334 2986
1335void 2987void
1336_set_state (char *data_) 2988rouse_wait (SV *cb = 0)
1337 PROTOTYPE: $ 2989 PROTOTYPE: ;$
2990 PPCODE:
2991 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2992
2993
2994MODULE = Coro::State PACKAGE = PerlIO::cede
2995
2996BOOT:
2997 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2998
2999
3000MODULE = Coro::State PACKAGE = Coro::Semaphore
3001
3002SV *
3003new (SV *klass, SV *count = 0)
1338 CODE: 3004 CODE:
1339{ 3005 RETVAL = sv_bless (
1340 struct io_state *data = (void *)data_; 3006 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3007 GvSTASH (CvGV (cv))
3008 );
3009 OUTPUT:
3010 RETVAL
1341 3011
1342 errno = data->errorno; 3012# helper for Coro::Channel
1343 PL_laststype = data->laststype; 3013SV *
1344 PL_laststatval = data->laststatval; 3014_alloc (int count)
1345 PL_statcache = data->statcache; 3015 CODE:
1346} 3016 RETVAL = coro_waitarray_new (aTHX_ count);
3017 OUTPUT:
3018 RETVAL
1347 3019
3020SV *
3021count (SV *self)
3022 CODE:
3023 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3024 OUTPUT:
3025 RETVAL
3026
3027void
3028up (SV *self, int adjust = 1)
3029 ALIAS:
3030 adjust = 1
3031 CODE:
3032 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3033
3034void
3035down (SV *self)
3036 CODE:
3037 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3038
3039void
3040wait (SV *self)
3041 CODE:
3042 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3043
3044void
3045try (SV *self)
3046 PPCODE:
3047{
3048 AV *av = (AV *)SvRV (self);
3049 SV *count_sv = AvARRAY (av)[0];
3050 IV count = SvIVX (count_sv);
3051
3052 if (count > 0)
3053 {
3054 --count;
3055 SvIVX (count_sv) = count;
3056 XSRETURN_YES;
3057 }
3058 else
3059 XSRETURN_NO;
3060}
3061
3062void
3063waiters (SV *self)
3064 PPCODE:
3065{
3066 AV *av = (AV *)SvRV (self);
3067 int wcount = AvFILLp (av) + 1 - 1;
3068
3069 if (GIMME_V == G_SCALAR)
3070 XPUSHs (sv_2mortal (newSViv (wcount)));
3071 else
3072 {
3073 int i;
3074 EXTEND (SP, wcount);
3075 for (i = 1; i <= wcount; ++i)
3076 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3077 }
3078}
3079
3080MODULE = Coro::State PACKAGE = Coro::Signal
3081
3082SV *
3083new (SV *klass)
3084 CODE:
3085 RETVAL = sv_bless (
3086 coro_waitarray_new (aTHX_ 0),
3087 GvSTASH (CvGV (cv))
3088 );
3089 OUTPUT:
3090 RETVAL
3091
3092void
3093wait (SV *self)
3094 CODE:
3095 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3096
3097void
3098broadcast (SV *self)
3099 CODE:
3100{
3101 AV *av = (AV *)SvRV (self);
3102 coro_signal_wake (aTHX_ av, AvFILLp (av));
3103}
3104
3105void
3106send (SV *self)
3107 CODE:
3108{
3109 AV *av = (AV *)SvRV (self);
3110
3111 if (AvFILLp (av))
3112 coro_signal_wake (aTHX_ av, 1);
3113 else
3114 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3115}
3116
3117IV
3118awaited (SV *self)
3119 CODE:
3120 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3121 OUTPUT:
3122 RETVAL
3123
3124
3125MODULE = Coro::State PACKAGE = Coro::AnyEvent
3126
3127BOOT:
3128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3129
3130void
3131_schedule (...)
3132 CODE:
3133{
3134 static int incede;
3135
3136 api_cede_notself (aTHX);
3137
3138 ++incede;
3139 while (coro_nready >= incede && api_cede (aTHX))
3140 ;
3141
3142 sv_setsv (sv_activity, &PL_sv_undef);
3143 if (coro_nready >= incede)
3144 {
3145 PUSHMARK (SP);
3146 PUTBACK;
3147 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148 }
3149
3150 --incede;
3151}
3152
3153
3154MODULE = Coro::State PACKAGE = Coro::AIO
3155
3156void
3157_register (char *target, char *proto, SV *req)
3158 CODE:
3159{
3160 HV *st;
3161 GV *gvp;
3162 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3163 /* newXSproto doesn't return the CV on 5.8 */
3164 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3165 sv_setpv ((SV *)slf_cv, proto);
3166 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3167}
3168

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