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Comparing Coro/Coro/State.xs (file contents):
Revision 1.220 by root, Thu Jan 10 05:43:14 2008 UTC vs.
Revision 1.318 by root, Thu Nov 20 07:02:43 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#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
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49 55
50#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
55 61
56#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr 63# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
59# endif 65# endif
… …
72# ifndef IS_PADCONST 78# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
74# endif 80# endif
75#endif 81#endif
76 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
77/* 5.8.7 */ 88/* 5.10.0 */
78#ifndef SvRV_set 89#ifndef SvREFCNT_inc_NN
79# define SvRV_set(s,v) SvRV(s) = (v) 90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
80#endif 91#endif
81 92
82/* 5.8.8 */ 93/* 5.8.8 */
83#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
85#endif 96#endif
86#ifndef newSV 97#ifndef newSV
87# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
88#endif 99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
89 111
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 113# undef CORO_STACKGUARD
92#endif 114#endif
93 115
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 122# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 123#endif
102 124
103/* The next macros try to return the current stack pointer, in an as 125/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
105#define dSTACKLEVEL volatile char stacklevel 131# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
107 134
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
109 136
110#if __GNUC__ >= 3 137#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
114#else 141#else
115# define attribute(x) 142# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 143# define expect(expr,value) (expr)
144# define INLINE static
118#endif 145#endif
119 146
120#define expect_false(expr) expect ((expr) != 0, 0) 147#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 148#define expect_true(expr) expect ((expr) != 0, 1)
122 149
123#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
124 151
125#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
126 154
127#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 156# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 158# endif
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 159#endif
135 160
136/* helper storage struct for Coro::AIO */ 161static double (*nvtime)(); /* so why doesn't it take void? */
137struct io_state
138{
139 int errorno;
140 I32 laststype;
141 int laststatval;
142 Stat_t statcache;
143};
144 162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 171static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
151 177
152static GV *irsgv; /* $/ */ 178static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 179static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 180static SV *rv_diehook;
155static SV *rv_warnhook; 181static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 182static HV *hv_sig; /* %SIG */
157 183
158/* async_pool helper stuff */ 184/* async_pool helper stuff */
159static SV *sv_pool_rss; 185static SV *sv_pool_rss;
160static SV *sv_pool_size; 186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
161static AV *av_async_pool; 188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
162 195
163static struct coro_cctx *cctx_first; 196static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 197static int cctx_count, cctx_idle;
165 198
166enum { 199enum {
… …
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 204 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 206};
174 207
175/* this is a structure representing a c-level coroutine */ 208/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 209typedef struct coro_cctx
210{
177 struct coro_cctx *next; 211 struct coro_cctx *next;
178 212
179 /* the stack */ 213 /* the stack */
180 void *sptr; 214 void *sptr;
181 size_t ssize; 215 size_t ssize;
… …
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 218 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
186 JMPENV *top_env; 220 JMPENV *top_env;
187 coro_context cctx; 221 coro_context cctx;
188 222
223 U32 gen;
189#if CORO_USE_VALGRIND 224#if CORO_USE_VALGRIND
190 int valgrind_id; 225 int valgrind_id;
191#endif 226#endif
192 unsigned char flags; 227 unsigned char flags;
193} coro_cctx; 228} coro_cctx;
… …
198 CF_NEW = 0x0004, /* has never been switched to */ 233 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200}; 235};
201 236
202/* the structure where most of the perl state is stored, overlaid on the cxstack */ 237/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct { 238typedef struct
239{
204 SV *defsv; 240 SV *defsv;
205 AV *defav; 241 AV *defav;
206 SV *errsv; 242 SV *errsv;
207 SV *irsgv; 243 SV *irsgv;
208#define VAR(name,type) type name; 244#define VAR(name,type) type name;
… …
212 248
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 250
215/* this is a structure representing a perl-level coroutine */ 251/* this is a structure representing a perl-level coroutine */
216struct coro { 252struct coro {
217 /* the c coroutine allocated to this perl coroutine, if any */ 253 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 254 coro_cctx *cctx;
219 255
220 /* process data */ 256 /* state data */
257 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 258 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 259 perl_slots *slot; /* basically the saved sp */
223 260
261 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 262 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */ 263 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 264 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
228 267
229 /* statistics */ 268 /* statistics */
230 int usecount; /* number of transfers to this coro */ 269 int usecount; /* number of transfers to this coro */
231 270
232 /* coro process data */ 271 /* coro process data */
233 int prio; 272 int prio;
234 SV *throw; /* exception to be thrown */ 273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
235 275
236 /* async_pool */ 276 /* async_pool */
237 SV *saved_deffh; 277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
238 280
239 /* linked list */ 281 /* linked list */
240 struct coro *next, *prev; 282 struct coro *next, *prev;
241}; 283};
242 284
243typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
287
288/* the following variables are effectively part of the perl context */
289/* and get copied between struct coro and these variables */
290/* the mainr easonw e don't support windows process emulation */
291static struct CoroSLF slf_frame; /* the current slf frame */
245 292
246/** Coro ********************************************************************/ 293/** Coro ********************************************************************/
247 294
248#define PRIO_MAX 3 295#define PRIO_MAX 3
249#define PRIO_HIGH 1 296#define PRIO_HIGH 1
… …
252#define PRIO_IDLE -3 299#define PRIO_IDLE -3
253#define PRIO_MIN -4 300#define PRIO_MIN -4
254 301
255/* for Coro.pm */ 302/* for Coro.pm */
256static SV *coro_current; 303static SV *coro_current;
304static SV *coro_readyhook;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
258static int coro_nready; 306static CV *cv_coro_run, *cv_coro_terminate;
259static struct coro *coro_first; 307static struct coro *coro_first;
308#define coro_nready coroapi.nready
260 309
261/** lowlevel stuff **********************************************************/ 310/** lowlevel stuff **********************************************************/
262 311
263static SV * 312static SV *
264coro_get_sv (pTHX_ const char *name, int create) 313coro_get_sv (pTHX_ const char *name, int create)
265{ 314{
266#if PERL_VERSION_ATLEAST (5,9,0) 315#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 316 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 317 get_sv (name, create);
269#endif 318#endif
270 return get_sv (name, create); 319 return get_sv (name, create);
271} 320}
272 321
273static AV * 322static AV *
274coro_get_av (pTHX_ const char *name, int create) 323coro_get_av (pTHX_ const char *name, int create)
275{ 324{
276#if PERL_VERSION_ATLEAST (5,9,0) 325#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 326 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 327 get_av (name, create);
279#endif 328#endif
280 return get_av (name, create); 329 return get_av (name, create);
281} 330}
282 331
283static HV * 332static HV *
284coro_get_hv (pTHX_ const char *name, int create) 333coro_get_hv (pTHX_ const char *name, int create)
285{ 334{
286#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_hv (name, create); 337 get_hv (name, create);
289#endif 338#endif
290 return get_hv (name, create); 339 return get_hv (name, create);
291} 340}
292 341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
349}
350
293static AV * 351static AV *
294coro_clone_padlist (pTHX_ CV *cv) 352coro_clone_padlist (pTHX_ CV *cv)
295{ 353{
296 AV *padlist = CvPADLIST (cv); 354 AV *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 355 AV *newpadlist, *newpad;
298 356
299 newpadlist = newAV (); 357 newpadlist = newAV ();
300 AvREAL_off (newpadlist); 358 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0) 359#if PERL_VERSION_ATLEAST (5,10,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else 361#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif 363#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist); 365 --AvFILLp (padlist);
308 366
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
310 av_store (newpadlist, 1, (SV *)newpad); 368 av_store (newpadlist, 1, (SV *)newpad);
311 369
312 return newpadlist; 370 return newpadlist;
313} 371}
314 372
… …
344 402
345 /* casting is fun. */ 403 /* casting is fun. */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
347 free_padlist (aTHX_ padlist); 405 free_padlist (aTHX_ padlist);
348 406
407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
408
349 return 0; 409 return 0;
350} 410}
351 411
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext 412#define CORO_MAGIC_type_cv 26
353#define CORO_MAGIC_type_state PERL_MAGIC_ext 413#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 414
355static MGVTBL coro_cv_vtbl = { 415static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 416 0, 0, 0, 0,
357 coro_cv_free 417 coro_cv_free
358}; 418};
359 419
420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
422 ? SvMAGIC (sv) \
423 : mg_find (sv, type))
424
360#define CORO_MAGIC(sv,type) \ 425#define CORO_MAGIC(sv, type) \
361 SvMAGIC (sv) \ 426 (expect_true (SvMAGIC (sv)) \
362 ? SvMAGIC (sv)->mg_type == type \ 427 ? CORO_MAGIC_NN (sv, type) \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0 428 : 0)
366 429
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 430#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
369 432
370static struct coro * 433INLINE struct coro *
371SvSTATE_ (pTHX_ SV *coro) 434SvSTATE_ (pTHX_ SV *coro)
372{ 435{
373 HV *stash; 436 HV *stash;
374 MAGIC *mg; 437 MAGIC *mg;
375 438
… …
390 mg = CORO_MAGIC_state (coro); 453 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr; 454 return (struct coro *)mg->mg_ptr;
392} 455}
393 456
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
395 462
396/* the next two functions merely cache the padlists */ 463/* the next two functions merely cache the padlists */
397static void 464static void
398get_padlist (pTHX_ CV *cv) 465get_padlist (pTHX_ CV *cv)
399{ 466{
… …
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
405 else 472 else
406 { 473 {
407#if CORO_PREFER_PERL_FUNCTIONS 474#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 477 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 478 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 479 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 480 SvREFCNT_dec (cp);
413#else 481#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
465 CvPADLIST (cv) = (AV *)POPs; 533 CvPADLIST (cv) = (AV *)POPs;
466 } 534 }
467 535
468 PUTBACK; 536 PUTBACK;
469 } 537 }
538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
470} 541}
471 542
472static void 543static void
473save_perl (pTHX_ Coro__State c) 544save_perl (pTHX_ Coro__State c)
474{ 545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
475 { 549 {
476 dSP; 550 dSP;
477 I32 cxix = cxstack_ix; 551 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 552 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 553 PERL_SI *top_si = PL_curstackinfo;
… …
497 571
498 if (expect_true (CvDEPTH (cv))) 572 if (expect_true (CvDEPTH (cv)))
499 { 573 {
500 EXTEND (SP, 3); 574 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 575 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 577 PUSHs ((SV *)cv);
504 578
505 CvDEPTH (cv) = 0; 579 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 580 get_padlist (aTHX_ cv);
507 } 581 }
… …
546 #undef VAR 620 #undef VAR
547 } 621 }
548} 622}
549 623
550/* 624/*
551 * allocate various perl stacks. This is an exact copy 625 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 626 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 627 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 628 * not usually need a lot of stackspace.
555 */ 629 */
556#if CORO_PREFER_PERL_FUNCTIONS 630#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 631# define coro_init_stacks(thx) init_stacks ()
558#else 632#else
559static void 633static void
560coro_init_stacks (pTHX) 634coro_init_stacks (pTHX)
561{ 635{
562 PL_curstackinfo = new_stackinfo(32, 8); 636 PL_curstackinfo = new_stackinfo(32, 8);
… …
587 661
588 New(54,PL_savestack,24,ANY); 662 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 663 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 664 PL_savestack_max = 24;
591 665
592#if !PERL_VERSION_ATLEAST (5,9,0) 666#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 667 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 668 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 669 PL_retstack_max = 4;
596#endif 670#endif
597} 671}
… …
599 673
600/* 674/*
601 * destroy the stacks, the callchain etc... 675 * destroy the stacks, the callchain etc...
602 */ 676 */
603static void 677static void
604coro_destroy_stacks (pTHX) 678coro_destruct_stacks (pTHX)
605{ 679{
606 while (PL_curstackinfo->si_next) 680 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 681 PL_curstackinfo = PL_curstackinfo->si_next;
608 682
609 while (PL_curstackinfo) 683 while (PL_curstackinfo)
… …
620 694
621 Safefree (PL_tmps_stack); 695 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 696 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 697 Safefree (PL_scopestack);
624 Safefree (PL_savestack); 698 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 699#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 700 Safefree (PL_retstack);
627#endif 701#endif
628} 702}
629 703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
630static size_t 713static size_t
631coro_rss (pTHX_ struct coro *coro) 714coro_rss (pTHX_ struct coro *coro)
632{ 715{
633 size_t rss = sizeof (*coro); 716 size_t rss = sizeof (*coro);
634 717
635 if (coro->mainstack) 718 if (coro->mainstack)
636 { 719 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 720 if (coro->flags & CF_RUNNING)
641 { 721 {
642 slot = &tmp_slot; 722 #define SYM(sym) PL_ ## sym
643 723 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 724 #undef SYM
647 } 725 }
648 else 726 else
649 slot = coro->slot; 727 {
650 728 #define SYM(sym) coro->slot->sym
651 rss += sizeof (slot->curstackinfo); 729 CORO_RSS;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 730 #undef SYM
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 731 }
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 } 732 }
663 733
664 return rss; 734 return rss;
665} 735}
666 736
667/** coroutine stack handling ************************************************/ 737/** coroutine stack handling ************************************************/
668 738
669static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
670static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
748#endif
671 749
672/* 750/*
673 * This overrides the default magic get method of %SIG elements. 751 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 752 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 753 * and instead of tryign to save and restore the hash elements, we just provide
… …
683{ 761{
684 const char *s = MgPV_nolen_const (mg); 762 const char *s = MgPV_nolen_const (mg);
685 763
686 if (*s == '_') 764 if (*s == '_')
687 { 765 {
688 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 766 SV **svp = 0;
689 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
775 }
690 } 776 }
691 777
692 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
693} 803}
694 804
695static int 805static int
696coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
697{ 807{
… …
707 if (svp) 817 if (svp)
708 { 818 {
709 SV *old = *svp; 819 SV *old = *svp;
710 *svp = newSVsv (sv); 820 *svp = newSVsv (sv);
711 SvREFCNT_dec (old); 821 SvREFCNT_dec (old);
712 return; 822 return 0;
713 } 823 }
714 } 824 }
715 825
716 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
717} 827}
718 828
719static void 829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
720coro_setup (pTHX_ struct coro *coro) 851coro_setup (pTHX_ struct coro *coro)
721{ 852{
722 /* 853 /*
723 * emulate part of the perl startup here. 854 * emulate part of the perl startup here.
724 */ 855 */
… …
731 PL_curpm = 0; 862 PL_curpm = 0;
732 PL_curpad = 0; 863 PL_curpad = 0;
733 PL_localizing = 0; 864 PL_localizing = 0;
734 PL_dirty = 0; 865 PL_dirty = 0;
735 PL_restartop = 0; 866 PL_restartop = 0;
867#if PERL_VERSION_ATLEAST (5,10,0)
868 PL_parser = 0;
869#endif
736 870
737 /* recreate the die/warn hooks */ 871 /* recreate the die/warn hooks */
738 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 872 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
739 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 873 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
740 874
741 GvSV (PL_defgv) = newSV (0); 875 GvSV (PL_defgv) = newSV (0);
742 GvAV (PL_defgv) = coro->args; coro->args = 0; 876 GvAV (PL_defgv) = coro->args; coro->args = 0;
743 GvSV (PL_errgv) = newSV (0); 877 GvSV (PL_errgv) = newSV (0);
744 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
745 PL_rs = newSVsv (GvSV (irsgv)); 879 PL_rs = newSVsv (GvSV (irsgv));
746 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
747 881
748 { 882 {
749 dSP; 883 dSP;
750 LOGOP myop; 884 UNOP myop;
751 885
752 Zero (&myop, 1, LOGOP); 886 Zero (&myop, 1, UNOP);
753 myop.op_next = Nullop; 887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
754 myop.op_flags = OPf_WANT_VOID; 889 myop.op_flags = OPf_WANT_VOID;
755 890
756 PUSHMARK (SP); 891 PUSHMARK (SP);
757 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 892 PUSHs ((SV *)coro->startcv);
758 PUTBACK; 893 PUTBACK;
759 PL_op = (OP *)&myop; 894 PL_op = (OP *)&myop;
760 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
761 SPAGAIN;
762 } 896 }
763 897
764 /* this newly created coroutine might be run on an existing cctx which most 898 /* this newly created coroutine might be run on an existing cctx which most
765 * likely was suspended in set_stacklevel, called from entersub. 899 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
766 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
767 * so we ENTER here for symmetry
768 */ 900 */
769 ENTER; 901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
770} 902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
771 903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_CUSTOM;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
772static void 916static void
773coro_destroy (pTHX_ struct coro *coro) 917coro_destruct (pTHX_ struct coro *coro)
774{ 918{
775 if (!IN_DESTRUCT) 919 if (!IN_DESTRUCT)
776 { 920 {
777 /* restore all saved variables and stuff */ 921 /* restore all saved variables and stuff */
778 LEAVE_SCOPE (0); 922 LEAVE_SCOPE (0);
… …
798 942
799 SvREFCNT_dec (PL_diehook); 943 SvREFCNT_dec (PL_diehook);
800 SvREFCNT_dec (PL_warnhook); 944 SvREFCNT_dec (PL_warnhook);
801 945
802 SvREFCNT_dec (coro->saved_deffh); 946 SvREFCNT_dec (coro->saved_deffh);
803 SvREFCNT_dec (coro->throw); 947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
804 950
805 coro_destroy_stacks (aTHX); 951 coro_destruct_stacks (aTHX);
806} 952}
807 953
808static void 954INLINE void
809free_coro_mortal (pTHX) 955free_coro_mortal (pTHX)
810{ 956{
811 if (expect_true (coro_mortal)) 957 if (expect_true (coro_mortal))
812 { 958 {
813 SvREFCNT_dec (coro_mortal); 959 SvREFCNT_dec (coro_mortal);
… …
818static int 964static int
819runops_trace (pTHX) 965runops_trace (pTHX)
820{ 966{
821 COP *oldcop = 0; 967 COP *oldcop = 0;
822 int oldcxix = -2; 968 int oldcxix = -2;
823 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
824 coro_cctx *cctx = coro->cctx; 970 coro_cctx *cctx = coro->cctx;
825 971
826 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
827 { 973 {
828 PERL_ASYNC_CHECK (); 974 PERL_ASYNC_CHECK ();
… …
847 : cx->blk_gimme == G_SCALAR ? bot + 1 993 : cx->blk_gimme == G_SCALAR ? bot + 1
848 : bot; 994 : bot;
849 995
850 av_extend (av, top - bot); 996 av_extend (av, top - bot);
851 while (bot < top) 997 while (bot < top)
852 av_push (av, SvREFCNT_inc (*bot++)); 998 av_push (av, SvREFCNT_inc_NN (*bot++));
853 999
854 PL_runops = RUNOPS_DEFAULT; 1000 PL_runops = RUNOPS_DEFAULT;
855 ENTER; 1001 ENTER;
856 SAVETMPS; 1002 SAVETMPS;
857 EXTEND (SP, 3); 1003 EXTEND (SP, 3);
… …
895 SAVETMPS; 1041 SAVETMPS;
896 EXTEND (SP, 3); 1042 EXTEND (SP, 3);
897 PUSHMARK (SP); 1043 PUSHMARK (SP);
898 PUSHs (&PL_sv_yes); 1044 PUSHs (&PL_sv_yes);
899 PUSHs (fullname); 1045 PUSHs (fullname);
900 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1046 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
901 PUTBACK; 1047 PUTBACK;
902 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1048 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
903 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1049 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
904 SPAGAIN; 1050 SPAGAIN;
905 FREETMPS; 1051 FREETMPS;
… …
937 1083
938 TAINT_NOT; 1084 TAINT_NOT;
939 return 0; 1085 return 0;
940} 1086}
941 1087
942/* inject a fake call to Coro::State::_cctx_init into the execution */ 1088static struct coro_cctx *cctx_ssl_cctx;
943/* _cctx_init should be careful, as it could be called at almost any time */ 1089static struct CoroSLF cctx_ssl_frame;
944/* during execution of a perl program */ 1090
1091static void
1092slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1093{
1094 ta->prev = (struct coro *)cctx_ssl_cctx;
1095 ta->next = 0;
1096}
1097
1098static int
1099slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1100{
1101 *frame = cctx_ssl_frame;
1102
1103 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1104}
1105
1106/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
945static void NOINLINE 1107static void NOINLINE
946cctx_prepare (pTHX_ coro_cctx *cctx) 1108cctx_prepare (pTHX_ coro_cctx *cctx)
947{ 1109{
948 dSP;
949 LOGOP myop;
950
951 PL_top_env = &PL_start_env; 1110 PL_top_env = &PL_start_env;
952 1111
953 if (cctx->flags & CC_TRACE) 1112 if (cctx->flags & CC_TRACE)
954 PL_runops = runops_trace; 1113 PL_runops = runops_trace;
955 1114
956 Zero (&myop, 1, LOGOP); 1115 /* we already must be executing an SLF op, there is no other valid way
957 myop.op_next = PL_op; 1116 * that can lead to creation of a new cctx */
958 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1117 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1118 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
959 1119
960 PUSHMARK (SP); 1120 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
961 EXTEND (SP, 2); 1121 cctx_ssl_cctx = cctx;
962 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1122 cctx_ssl_frame = slf_frame;
963 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1123
964 PUTBACK; 1124 slf_frame.prepare = slf_prepare_set_stacklevel;
965 PL_op = (OP *)&myop; 1125 slf_frame.check = slf_check_set_stacklevel;
966 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1126}
967 SPAGAIN; 1127
1128/* the tail of transfer: execute stuff we can only do after a transfer */
1129INLINE void
1130transfer_tail (pTHX)
1131{
1132 free_coro_mortal (aTHX);
968} 1133}
969 1134
970/* 1135/*
971 * this is a _very_ stripped down perl interpreter ;) 1136 * this is a _very_ stripped down perl interpreter ;)
972 */ 1137 */
973static void 1138static void
974cctx_run (void *arg) 1139cctx_run (void *arg)
975{ 1140{
1141#ifdef USE_ITHREADS
1142# if CORO_PTHREAD
1143 PERL_SET_CONTEXT (coro_thx);
1144# endif
1145#endif
1146 {
976 dTHX; 1147 dTHX;
977 1148
978 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1149 /* normally we would need to skip the entersub here */
979 UNLOCK; 1150 /* not doing so will re-execute it, which is exactly what we want */
980
981 /* we now skip the entersub that lead to transfer() */
982 PL_op = PL_op->op_next; 1151 /* PL_nop = PL_nop->op_next */
983 1152
984 /* inject a fake subroutine call to cctx_init */ 1153 /* inject a fake subroutine call to cctx_init */
985 cctx_prepare (aTHX_ (coro_cctx *)arg); 1154 cctx_prepare (aTHX_ (coro_cctx *)arg);
986 1155
1156 /* cctx_run is the alternative tail of transfer() */
1157 transfer_tail (aTHX);
1158
987 /* somebody or something will hit me for both perl_run and PL_restartop */ 1159 /* somebody or something will hit me for both perl_run and PL_restartop */
988 PL_restartop = PL_op; 1160 PL_restartop = PL_op;
989 perl_run (PL_curinterp); 1161 perl_run (PL_curinterp);
990
991 /* 1162 /*
1163 * Unfortunately, there is no way to get at the return values of the
1164 * coro body here, as perl_run destroys these
1165 */
1166
1167 /*
992 * If perl-run returns we assume exit() was being called or the coro 1168 * If perl-run returns we assume exit() was being called or the coro
993 * fell off the end, which seems to be the only valid (non-bug) 1169 * fell off the end, which seems to be the only valid (non-bug)
994 * reason for perl_run to return. We try to exit by jumping to the 1170 * reason for perl_run to return. We try to exit by jumping to the
995 * bootstrap-time "top" top_env, as we cannot restore the "main" 1171 * bootstrap-time "top" top_env, as we cannot restore the "main"
996 * coroutine as Coro has no such concept 1172 * coroutine as Coro has no such concept
997 */ 1173 */
998 PL_top_env = main_top_env; 1174 PL_top_env = main_top_env;
999 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1175 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1176 }
1000} 1177}
1001 1178
1002static coro_cctx * 1179static coro_cctx *
1003cctx_new () 1180cctx_new ()
1004{ 1181{
1005 coro_cctx *cctx; 1182 coro_cctx *cctx;
1183
1184 ++cctx_count;
1185 New (0, cctx, 1, coro_cctx);
1186
1187 cctx->gen = cctx_gen;
1188 cctx->flags = 0;
1189 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1190
1191 return cctx;
1192}
1193
1194/* create a new cctx only suitable as source */
1195static coro_cctx *
1196cctx_new_empty ()
1197{
1198 coro_cctx *cctx = cctx_new ();
1199
1200 cctx->sptr = 0;
1201 coro_create (&cctx->cctx, 0, 0, 0, 0);
1202
1203 return cctx;
1204}
1205
1206/* create a new cctx suitable as destination/running a perl interpreter */
1207static coro_cctx *
1208cctx_new_run ()
1209{
1210 coro_cctx *cctx = cctx_new ();
1006 void *stack_start; 1211 void *stack_start;
1007 size_t stack_size; 1212 size_t stack_size;
1008 1213
1009 ++cctx_count;
1010
1011 Newz (0, cctx, 1, coro_cctx);
1012
1013#if HAVE_MMAP 1214#if HAVE_MMAP
1014 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1215 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1015 /* mmap supposedly does allocate-on-write for us */ 1216 /* mmap supposedly does allocate-on-write for us */
1016 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1217 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1017 1218
1018 if (cctx->sptr != (void *)-1) 1219 if (cctx->sptr != (void *)-1)
1019 { 1220 {
1020# if CORO_STACKGUARD 1221 #if CORO_STACKGUARD
1021 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1222 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1022# endif 1223 #endif
1023 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1224 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1024 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1225 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1025 cctx->flags |= CC_MAPPED; 1226 cctx->flags |= CC_MAPPED;
1026 } 1227 }
1027 else 1228 else
1028#endif 1229#endif
1029 { 1230 {
1030 cctx->ssize = coro_stacksize * (long)sizeof (long); 1231 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1031 New (0, cctx->sptr, coro_stacksize, long); 1232 New (0, cctx->sptr, cctx_stacksize, long);
1032 1233
1033 if (!cctx->sptr) 1234 if (!cctx->sptr)
1034 { 1235 {
1035 perror ("FATAL: unable to allocate stack for coroutine"); 1236 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1036 _exit (EXIT_FAILURE); 1237 _exit (EXIT_FAILURE);
1037 } 1238 }
1038 1239
1039 stack_start = cctx->sptr; 1240 stack_start = cctx->sptr;
1040 stack_size = cctx->ssize; 1241 stack_size = cctx->ssize;
1041 } 1242 }
1042 1243
1043 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1244 #if CORO_USE_VALGRIND
1245 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1246 #endif
1247
1044 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1248 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1045 1249
1046 return cctx; 1250 return cctx;
1047} 1251}
1048 1252
… …
1051{ 1255{
1052 if (!cctx) 1256 if (!cctx)
1053 return; 1257 return;
1054 1258
1055 --cctx_count; 1259 --cctx_count;
1260 coro_destroy (&cctx->cctx);
1056 1261
1262 /* coro_transfer creates new, empty cctx's */
1263 if (cctx->sptr)
1264 {
1057#if CORO_USE_VALGRIND 1265 #if CORO_USE_VALGRIND
1058 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1266 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1267 #endif
1268
1269#if HAVE_MMAP
1270 if (cctx->flags & CC_MAPPED)
1271 munmap (cctx->sptr, cctx->ssize);
1272 else
1059#endif 1273#endif
1060
1061#if HAVE_MMAP
1062 if (cctx->flags & CC_MAPPED)
1063 munmap (cctx->sptr, cctx->ssize);
1064 else
1065#endif
1066 Safefree (cctx->sptr); 1274 Safefree (cctx->sptr);
1275 }
1067 1276
1068 Safefree (cctx); 1277 Safefree (cctx);
1069} 1278}
1070 1279
1071/* wether this cctx should be destructed */ 1280/* wether this cctx should be destructed */
1072#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1281#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1073 1282
1074static coro_cctx * 1283static coro_cctx *
1075cctx_get (pTHX) 1284cctx_get (pTHX)
1076{ 1285{
1077 while (expect_true (cctx_first)) 1286 while (expect_true (cctx_first))
… …
1084 return cctx; 1293 return cctx;
1085 1294
1086 cctx_destroy (cctx); 1295 cctx_destroy (cctx);
1087 } 1296 }
1088 1297
1089 return cctx_new (); 1298 return cctx_new_run ();
1090} 1299}
1091 1300
1092static void 1301static void
1093cctx_put (coro_cctx *cctx) 1302cctx_put (coro_cctx *cctx)
1094{ 1303{
1304 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1305
1095 /* free another cctx if overlimit */ 1306 /* free another cctx if overlimit */
1096 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1307 if (expect_false (cctx_idle >= cctx_max_idle))
1097 { 1308 {
1098 coro_cctx *first = cctx_first; 1309 coro_cctx *first = cctx_first;
1099 cctx_first = first->next; 1310 cctx_first = first->next;
1100 --cctx_idle; 1311 --cctx_idle;
1101 1312
… …
1110/** coroutine switching *****************************************************/ 1321/** coroutine switching *****************************************************/
1111 1322
1112static void 1323static void
1113transfer_check (pTHX_ struct coro *prev, struct coro *next) 1324transfer_check (pTHX_ struct coro *prev, struct coro *next)
1114{ 1325{
1326 /* TODO: throwing up here is considered harmful */
1327
1115 if (expect_true (prev != next)) 1328 if (expect_true (prev != next))
1116 { 1329 {
1117 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1330 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1118 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1331 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1119 1332
1120 if (expect_false (next->flags & CF_RUNNING)) 1333 if (expect_false (next->flags & CF_RUNNING))
1121 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1334 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1122 1335
1123 if (expect_false (next->flags & CF_DESTROYED)) 1336 if (expect_false (next->flags & CF_DESTROYED))
1124 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1337 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1125 1338
1126 if (
1127#if PERL_VERSION_ATLEAST (5,9,0) 1339#if !PERL_VERSION_ATLEAST (5,10,0)
1128 expect_false (PL_parser)
1129#else
1130 expect_false (PL_lex_state != LEX_NOTPARSING) 1340 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1341 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1131#endif 1342#endif
1132 )
1133 croak ("Coro::State::transfer called while parsing, but this is not supported");
1134 } 1343 }
1135} 1344}
1136 1345
1137/* always use the TRANSFER macro */ 1346/* always use the TRANSFER macro */
1138static void NOINLINE 1347static void NOINLINE /* noinline so we have a fixed stackframe */
1139transfer (pTHX_ struct coro *prev, struct coro *next) 1348transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1140{ 1349{
1141 dSTACKLEVEL; 1350 dSTACKLEVEL;
1142 static volatile int has_throw;
1143 1351
1144 /* sometimes transfer is only called to set idle_sp */ 1352 /* sometimes transfer is only called to set idle_sp */
1145 if (expect_false (!next)) 1353 if (expect_false (!next))
1146 { 1354 {
1147 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1355 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1151 { 1359 {
1152 coro_cctx *prev__cctx; 1360 coro_cctx *prev__cctx;
1153 1361
1154 if (expect_false (prev->flags & CF_NEW)) 1362 if (expect_false (prev->flags & CF_NEW))
1155 { 1363 {
1156 /* create a new empty context */ 1364 /* create a new empty/source context */
1157 Newz (0, prev->cctx, 1, coro_cctx); 1365 prev->cctx = cctx_new_empty ();
1158 prev->flags &= ~CF_NEW; 1366 prev->flags &= ~CF_NEW;
1159 prev->flags |= CF_RUNNING; 1367 prev->flags |= CF_RUNNING;
1160 } 1368 }
1161 1369
1162 prev->flags &= ~CF_RUNNING; 1370 prev->flags &= ~CF_RUNNING;
1163 next->flags |= CF_RUNNING; 1371 next->flags |= CF_RUNNING;
1164
1165 LOCK;
1166 1372
1167 /* first get rid of the old state */ 1373 /* first get rid of the old state */
1168 save_perl (aTHX_ prev); 1374 save_perl (aTHX_ prev);
1169 1375
1170 if (expect_false (next->flags & CF_NEW)) 1376 if (expect_false (next->flags & CF_NEW))
… …
1177 else 1383 else
1178 load_perl (aTHX_ next); 1384 load_perl (aTHX_ next);
1179 1385
1180 prev__cctx = prev->cctx; 1386 prev__cctx = prev->cctx;
1181 1387
1182 /* possibly "free" the cctx */ 1388 /* possibly untie and reuse the cctx */
1183 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1389 if (expect_true (
1390 prev__cctx->idle_sp == STACKLEVEL
1391 && !(prev__cctx->flags & CC_TRACE)
1392 && !force_cctx
1393 ))
1184 { 1394 {
1185 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1395 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1186 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1396 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1187 1397
1188 prev->cctx = 0; 1398 prev->cctx = 0;
1189 1399
1190 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1400 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1191 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1401 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1198 1408
1199 ++next->usecount; 1409 ++next->usecount;
1200 1410
1201 if (expect_true (!next->cctx)) 1411 if (expect_true (!next->cctx))
1202 next->cctx = cctx_get (aTHX); 1412 next->cctx = cctx_get (aTHX);
1203
1204 has_throw = !!next->throw;
1205 1413
1206 if (expect_false (prev__cctx != next->cctx)) 1414 if (expect_false (prev__cctx != next->cctx))
1207 { 1415 {
1208 prev__cctx->top_env = PL_top_env; 1416 prev__cctx->top_env = PL_top_env;
1209 PL_top_env = next->cctx->top_env; 1417 PL_top_env = next->cctx->top_env;
1210 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1418 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1211 } 1419 }
1212 1420
1213 free_coro_mortal (aTHX); 1421 transfer_tail (aTHX);
1214 UNLOCK;
1215
1216 if (expect_false (has_throw))
1217 {
1218 struct coro *coro = SvSTATE (coro_current);
1219
1220 if (coro->throw)
1221 {
1222 SV *exception = coro->throw;
1223 coro->throw = 0;
1224 sv_setsv (ERRSV, exception);
1225 croak (0);
1226 }
1227 }
1228 } 1422 }
1229} 1423}
1230 1424
1231struct transfer_args
1232{
1233 struct coro *prev, *next;
1234};
1235
1236#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1425#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1237#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1426#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1238 1427
1239/** high level stuff ********************************************************/ 1428/** high level stuff ********************************************************/
1240 1429
1241static int 1430static int
1242coro_state_destroy (pTHX_ struct coro *coro) 1431coro_state_destroy (pTHX_ struct coro *coro)
1243{ 1432{
1244 if (coro->flags & CF_DESTROYED) 1433 if (coro->flags & CF_DESTROYED)
1245 return 0; 1434 return 0;
1435
1436 if (coro->on_destroy)
1437 coro->on_destroy (aTHX_ coro);
1246 1438
1247 coro->flags |= CF_DESTROYED; 1439 coro->flags |= CF_DESTROYED;
1248 1440
1249 if (coro->flags & CF_READY) 1441 if (coro->flags & CF_READY)
1250 { 1442 {
1251 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1443 /* reduce nready, as destroying a ready coro effectively unreadies it */
1252 /* alternative: look through all ready queues and remove the coro */ 1444 /* alternative: look through all ready queues and remove the coro */
1253 LOCK;
1254 --coro_nready; 1445 --coro_nready;
1255 UNLOCK;
1256 } 1446 }
1257 else 1447 else
1258 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1448 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1259 1449
1260 if (coro->mainstack && coro->mainstack != main_mainstack) 1450 if (coro->mainstack && coro->mainstack != main_mainstack)
1261 { 1451 {
1262 struct coro temp; 1452 struct coro temp;
1263 1453
1264 if (coro->flags & CF_RUNNING) 1454 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1265 croak ("FATAL: tried to destroy currently running coroutine");
1266 1455
1267 save_perl (aTHX_ &temp); 1456 save_perl (aTHX_ &temp);
1268 load_perl (aTHX_ coro); 1457 load_perl (aTHX_ coro);
1269 1458
1270 coro_destroy (aTHX_ coro); 1459 coro_destruct (aTHX_ coro);
1271 1460
1272 load_perl (aTHX_ &temp); 1461 load_perl (aTHX_ &temp);
1273 1462
1274 coro->slot = 0; 1463 coro->slot = 0;
1275 } 1464 }
1276 1465
1277 cctx_destroy (coro->cctx); 1466 cctx_destroy (coro->cctx);
1467 SvREFCNT_dec (coro->startcv);
1278 SvREFCNT_dec (coro->args); 1468 SvREFCNT_dec (coro->args);
1469 SvREFCNT_dec (CORO_THROW);
1279 1470
1280 if (coro->next) coro->next->prev = coro->prev; 1471 if (coro->next) coro->next->prev = coro->prev;
1281 if (coro->prev) coro->prev->next = coro->next; 1472 if (coro->prev) coro->prev->next = coro->next;
1282 if (coro == coro_first) coro_first = coro->next; 1473 if (coro == coro_first) coro_first = coro->next;
1283 1474
… …
1321# define MGf_DUP 0 1512# define MGf_DUP 0
1322#endif 1513#endif
1323}; 1514};
1324 1515
1325static void 1516static void
1326prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1517prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1327{ 1518{
1328 ta->prev = SvSTATE (prev_sv); 1519 ta->prev = SvSTATE (prev_sv);
1329 ta->next = SvSTATE (next_sv); 1520 ta->next = SvSTATE (next_sv);
1330 TRANSFER_CHECK (*ta); 1521 TRANSFER_CHECK (*ta);
1331} 1522}
1332 1523
1333static void 1524static void
1334api_transfer (SV *prev_sv, SV *next_sv) 1525api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1335{ 1526{
1336 dTHX;
1337 struct transfer_args ta; 1527 struct coro_transfer_args ta;
1338 1528
1339 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1529 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1340 TRANSFER (ta); 1530 TRANSFER (ta, 1);
1531}
1532
1533/*****************************************************************************/
1534/* gensub: simple closure generation utility */
1535
1536#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1537
1538/* create a closure from XS, returns a code reference */
1539/* the arg can be accessed via GENSUB_ARG from the callback */
1540/* the callback must use dXSARGS/XSRETURN */
1541static SV *
1542gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1543{
1544 CV *cv = (CV *)newSV (0);
1545
1546 sv_upgrade ((SV *)cv, SVt_PVCV);
1547
1548 CvANON_on (cv);
1549 CvISXSUB_on (cv);
1550 CvXSUB (cv) = xsub;
1551 GENSUB_ARG = arg;
1552
1553 return newRV_noinc ((SV *)cv);
1341} 1554}
1342 1555
1343/** Coro ********************************************************************/ 1556/** Coro ********************************************************************/
1344 1557
1345static void 1558INLINE void
1346coro_enq (pTHX_ SV *coro_sv) 1559coro_enq (pTHX_ struct coro *coro)
1347{ 1560{
1348 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1561 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1349} 1562}
1350 1563
1351static SV * 1564INLINE SV *
1352coro_deq (pTHX) 1565coro_deq (pTHX)
1353{ 1566{
1354 int prio; 1567 int prio;
1355 1568
1356 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1569 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
… …
1359 1572
1360 return 0; 1573 return 0;
1361} 1574}
1362 1575
1363static int 1576static int
1364api_ready (SV *coro_sv) 1577api_ready (pTHX_ SV *coro_sv)
1365{ 1578{
1366 dTHX;
1367 struct coro *coro; 1579 struct coro *coro;
1580 SV *sv_hook;
1581 void (*xs_hook)(void);
1368 1582
1369 if (SvROK (coro_sv)) 1583 if (SvROK (coro_sv))
1370 coro_sv = SvRV (coro_sv); 1584 coro_sv = SvRV (coro_sv);
1371 1585
1372 coro = SvSTATE (coro_sv); 1586 coro = SvSTATE (coro_sv);
… …
1374 if (coro->flags & CF_READY) 1588 if (coro->flags & CF_READY)
1375 return 0; 1589 return 0;
1376 1590
1377 coro->flags |= CF_READY; 1591 coro->flags |= CF_READY;
1378 1592
1379 LOCK; 1593 sv_hook = coro_nready ? 0 : coro_readyhook;
1380 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1594 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1595
1596 coro_enq (aTHX_ coro);
1381 ++coro_nready; 1597 ++coro_nready;
1382 UNLOCK; 1598
1599 if (sv_hook)
1600 {
1601 dSP;
1602
1603 ENTER;
1604 SAVETMPS;
1605
1606 PUSHMARK (SP);
1607 PUTBACK;
1608 call_sv (sv_hook, G_VOID | G_DISCARD);
1609
1610 FREETMPS;
1611 LEAVE;
1612 }
1613
1614 if (xs_hook)
1615 xs_hook ();
1383 1616
1384 return 1; 1617 return 1;
1385} 1618}
1386 1619
1387static int 1620static int
1388api_is_ready (SV *coro_sv) 1621api_is_ready (pTHX_ SV *coro_sv)
1389{ 1622{
1390 dTHX;
1391 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1623 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1392} 1624}
1393 1625
1626/* expects to own a reference to next->hv */
1627INLINE void
1628prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1629{
1630 SV *prev_sv = SvRV (coro_current);
1631
1632 ta->prev = SvSTATE_hv (prev_sv);
1633 ta->next = next;
1634
1635 TRANSFER_CHECK (*ta);
1636
1637 SvRV_set (coro_current, (SV *)next->hv);
1638
1639 free_coro_mortal (aTHX);
1640 coro_mortal = prev_sv;
1641}
1642
1394static void 1643static void
1395prepare_schedule (pTHX_ struct transfer_args *ta) 1644prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1396{ 1645{
1397 SV *prev_sv, *next_sv;
1398
1399 for (;;) 1646 for (;;)
1400 { 1647 {
1401 LOCK;
1402 next_sv = coro_deq (aTHX); 1648 SV *next_sv = coro_deq (aTHX);
1403 1649
1404 /* nothing to schedule: call the idle handler */
1405 if (expect_false (!next_sv)) 1650 if (expect_true (next_sv))
1406 { 1651 {
1652 struct coro *next = SvSTATE_hv (next_sv);
1653
1654 /* cannot transfer to destroyed coros, skip and look for next */
1655 if (expect_false (next->flags & CF_DESTROYED))
1656 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1657 else
1658 {
1659 next->flags &= ~CF_READY;
1660 --coro_nready;
1661
1662 return prepare_schedule_to (aTHX_ ta, next);
1663 }
1664 }
1665 else
1666 {
1667 /* nothing to schedule: call the idle handler */
1407 dSP; 1668 dSP;
1408 UNLOCK;
1409 1669
1410 ENTER; 1670 ENTER;
1411 SAVETMPS; 1671 SAVETMPS;
1412 1672
1413 PUSHMARK (SP); 1673 PUSHMARK (SP);
1414 PUTBACK; 1674 PUTBACK;
1415 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1416 SPAGAIN;
1417 1676
1418 FREETMPS; 1677 FREETMPS;
1419 LEAVE; 1678 LEAVE;
1420 continue;
1421 } 1679 }
1422
1423 ta->next = SvSTATE (next_sv);
1424
1425 /* cannot transfer to destroyed coros, skip and look for next */
1426 if (expect_false (ta->next->flags & CF_DESTROYED))
1427 {
1428 UNLOCK;
1429 SvREFCNT_dec (next_sv);
1430 /* coro_nready is already taken care of by destroy */
1431 continue;
1432 }
1433
1434 --coro_nready;
1435 UNLOCK;
1436 break;
1437 } 1680 }
1438
1439 /* free this only after the transfer */
1440 prev_sv = SvRV (coro_current);
1441 ta->prev = SvSTATE (prev_sv);
1442 TRANSFER_CHECK (*ta);
1443 assert (ta->next->flags & CF_READY);
1444 ta->next->flags &= ~CF_READY;
1445 SvRV_set (coro_current, next_sv);
1446
1447 LOCK;
1448 free_coro_mortal (aTHX);
1449 coro_mortal = prev_sv;
1450 UNLOCK;
1451} 1681}
1452 1682
1453static void 1683INLINE void
1454prepare_cede (pTHX_ struct transfer_args *ta) 1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1455{ 1685{
1456 api_ready (coro_current); 1686 api_ready (aTHX_ coro_current);
1457 prepare_schedule (aTHX_ ta); 1687 prepare_schedule (aTHX_ ta);
1458} 1688}
1459 1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1721}
1722
1460static int 1723static int
1461prepare_cede_notself (pTHX_ struct transfer_args *ta) 1724api_cede (pTHX)
1462{ 1725{
1463 if (coro_nready) 1726 struct coro_transfer_args ta;
1464 { 1727
1465 SV *prev = SvRV (coro_current);
1466 prepare_schedule (aTHX_ ta); 1728 prepare_cede (aTHX_ &ta);
1467 api_ready (prev); 1729
1730 if (expect_true (ta.prev != ta.next))
1731 {
1732 TRANSFER (ta, 1);
1468 return 1; 1733 return 1;
1469 } 1734 }
1470 else 1735 else
1471 return 0; 1736 return 0;
1472} 1737}
1473 1738
1474static void
1475api_schedule (void)
1476{
1477 dTHX;
1478 struct transfer_args ta;
1479
1480 prepare_schedule (aTHX_ &ta);
1481 TRANSFER (ta);
1482}
1483
1484static int 1739static int
1485api_cede (void) 1740api_cede_notself (pTHX)
1486{ 1741{
1487 dTHX; 1742 if (coro_nready)
1743 {
1488 struct transfer_args ta; 1744 struct coro_transfer_args ta;
1489 1745
1490 prepare_cede (aTHX_ &ta); 1746 prepare_cede_notself (aTHX_ &ta);
1491
1492 if (expect_true (ta.prev != ta.next))
1493 {
1494 TRANSFER (ta); 1747 TRANSFER (ta, 1);
1495 return 1; 1748 return 1;
1496 } 1749 }
1497 else 1750 else
1498 return 0; 1751 return 0;
1499} 1752}
1500 1753
1501static int 1754static void
1502api_cede_notself (void)
1503{
1504 dTHX;
1505 struct transfer_args ta;
1506
1507 if (prepare_cede_notself (aTHX_ &ta))
1508 {
1509 TRANSFER (ta);
1510 return 1;
1511 }
1512 else
1513 return 0;
1514}
1515
1516static void
1517api_trace (SV *coro_sv, int flags) 1755api_trace (pTHX_ SV *coro_sv, int flags)
1518{ 1756{
1519 dTHX;
1520 struct coro *coro = SvSTATE (coro_sv); 1757 struct coro *coro = SvSTATE (coro_sv);
1521 1758
1522 if (flags & CC_TRACE) 1759 if (flags & CC_TRACE)
1523 { 1760 {
1524 if (!coro->cctx) 1761 if (!coro->cctx)
1525 coro->cctx = cctx_new (); 1762 coro->cctx = cctx_new_run ();
1526 else if (!(coro->cctx->flags & CC_TRACE)) 1763 else if (!(coro->cctx->flags & CC_TRACE))
1527 croak ("cannot enable tracing on coroutine with custom stack"); 1764 croak ("cannot enable tracing on coroutine with custom stack,");
1528 1765
1529 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1530 } 1767 }
1531 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1532 { 1769 {
… …
1537 else 1774 else
1538 coro->slot->runops = RUNOPS_DEFAULT; 1775 coro->slot->runops = RUNOPS_DEFAULT;
1539 } 1776 }
1540} 1777}
1541 1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
1797 {
1798 int i;
1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
1801
1802 for (i = 0; i <= AvFILLp (status); ++i)
1803 PUSHs (AvARRAY (status)[i]);
1804 }
1805
1806 PUTBACK;
1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1808 }
1809 }
1810}
1811
1812static void
1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 int i;
1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
1818
1819 av_extend (av, items - 1);
1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
1832/*****************************************************************************/
1833/* async pool handler */
1834
1835static int
1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1837{
1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1849
1850 {
1851 dSP;
1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1853 PUTBACK;
1854 }
1855
1856 SvREFCNT_dec (GvAV (PL_defgv));
1857 GvAV (PL_defgv) = coro->invoke_av;
1858 coro->invoke_av = 0;
1859
1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
1875
1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
1881
1882 frame->prepare = prepare_nop;
1883 }
1884 else
1885 {
1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1888
1889 coro->prio = 0;
1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
1965 return 0;
1966}
1967
1968static void
1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1970{
1971 SV *cb;
1972
1973 if (items)
1974 cb = arg [0];
1975 else
1976 {
1977 struct coro *coro = SvSTATE_current;
1978
1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1981
1982 cb = sv_2mortal (coro->rouse_cb);
1983 coro->rouse_cb = 0;
1984 }
1985
1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
1990
1991 {
1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
1994
1995 frame->data = (void *)data;
1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1997 frame->check = slf_check_rouse_wait;
1998 }
1999}
2000
2001static SV *
2002coro_new_rouse_cb (pTHX)
2003{
2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2008
2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2010 SvREFCNT_dec (data); /* magicext increases the refcount */
2011
2012 SvREFCNT_dec (coro->rouse_cb);
2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2076{
2077 struct coro *next = (struct coro *)slf_frame.data;
2078
2079 SvREFCNT_inc_NN (next->hv);
2080 prepare_schedule_to (aTHX_ ta, next);
2081}
2082
2083static void
2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
2146 {
2147 /* ampersand-form of call, use @_ instead of stack */
2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
2169 struct coro_transfer_args ta;
2170
2171 slf_frame.prepare (aTHX_ &ta);
2172 TRANSFER (ta, 0);
2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
2403static int
2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2405{
2406 AV *av = (AV *)frame->data;
2407 SV *count_sv = AvARRAY (av)[0];
2408
2409 /* if we are about to throw, don't actually acquire the lock, just throw */
2410 if (CORO_THROW)
2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2435 return 1;
2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
2612}
2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
2623 return 0;
2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
2653
2654 return 0;
2655}
2656
2657static void
2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2661 SV *coro_hv = SvRV (coro_current);
2662 struct coro *coro = SvSTATE_hv (coro_hv);
2663
2664 /* put our coroutine id on the state arg */
2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
2666
2667 /* first see whether we have a non-zero priority and set it as AIO prio */
2668 if (coro->prio)
2669 {
2670 dSP;
2671
2672 static SV *prio_cv;
2673 static SV *prio_sv;
2674
2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
2680
2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
2684
2685 PUTBACK;
2686 call_sv (prio_cv, G_VOID | G_DISCARD);
2687 }
2688
2689 /* now call the original request */
2690 {
2691 dSP;
2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
2694
2695 PUSHMARK (SP);
2696
2697 /* first push all args to the stack */
2698 EXTEND (SP, items + 1);
2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
1542MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1543 2730
1544PROTOTYPES: DISABLE 2731PROTOTYPES: DISABLE
1545 2732
1546BOOT: 2733BOOT:
1547{ 2734{
1548#ifdef USE_ITHREADS 2735#ifdef USE_ITHREADS
1549 MUTEX_INIT (&coro_mutex); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
1550#endif 2739#endif
1551 BOOT_PAGESIZE; 2740 BOOT_PAGESIZE;
1552 2741
1553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1555 2744
1556 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2745 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1557 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2746 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1558 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2747 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1559 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1560 2748
1561 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1562 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2750 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1563 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1564 2752
… …
1573 main_top_env = PL_top_env; 2761 main_top_env = PL_top_env;
1574 2762
1575 while (main_top_env->je_prev) 2763 while (main_top_env->je_prev)
1576 main_top_env = main_top_env->je_prev; 2764 main_top_env = main_top_env->je_prev;
1577 2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf,
2771 newSVpv ("coro_slf", 0), 0);
2772
2773 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2774 hv_store_ent (PL_custom_op_descs, slf,
2775 newSVpv ("coro schedule like function", 0), 0);
2776 }
2777
1578 coroapi.ver = CORO_API_VERSION; 2778 coroapi.ver = CORO_API_VERSION;
1579 coroapi.rev = CORO_API_REVISION; 2779 coroapi.rev = CORO_API_REVISION;
2780
1580 coroapi.transfer = api_transfer; 2781 coroapi.transfer = api_transfer;
2782
2783 coroapi.sv_state = SvSTATE_;
2784 coroapi.execute_slf = api_execute_slf;
2785 coroapi.prepare_nop = prepare_nop;
2786 coroapi.prepare_schedule = prepare_schedule;
2787 coroapi.prepare_cede = prepare_cede;
2788 coroapi.prepare_cede_notself = prepare_cede_notself;
2789
2790 {
2791 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2792
2793 if (!svp) croak ("Time::HiRes is required");
2794 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2795
2796 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2797 }
1581 2798
1582 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2799 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1583} 2800}
1584 2801
1585SV * 2802SV *
1586new (char *klass, ...) 2803new (char *klass, ...)
2804 ALIAS:
2805 Coro::new = 1
1587 CODE: 2806 CODE:
1588{ 2807{
1589 struct coro *coro; 2808 struct coro *coro;
1590 MAGIC *mg; 2809 MAGIC *mg;
1591 HV *hv; 2810 HV *hv;
2811 CV *cb;
1592 int i; 2812 int i;
2813
2814 if (items > 1)
2815 {
2816 cb = coro_sv_2cv (aTHX_ ST (1));
2817
2818 if (!ix)
2819 {
2820 if (CvISXSUB (cb))
2821 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2822
2823 if (!CvROOT (cb))
2824 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2825 }
2826 }
1593 2827
1594 Newz (0, coro, 1, struct coro); 2828 Newz (0, coro, 1, struct coro);
1595 coro->args = newAV (); 2829 coro->args = newAV ();
1596 coro->flags = CF_NEW; 2830 coro->flags = CF_NEW;
1597 2831
… …
1602 coro->hv = hv = newHV (); 2836 coro->hv = hv = newHV ();
1603 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2837 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1604 mg->mg_flags |= MGf_DUP; 2838 mg->mg_flags |= MGf_DUP;
1605 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2839 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1606 2840
2841 if (items > 1)
2842 {
1607 av_extend (coro->args, items - 1); 2843 av_extend (coro->args, items - 1 + ix - 1);
2844
2845 if (ix)
2846 {
2847 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2848 cb = cv_coro_run;
2849 }
2850
2851 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2852
1608 for (i = 1; i < items; i++) 2853 for (i = 2; i < items; i++)
1609 av_push (coro->args, newSVsv (ST (i))); 2854 av_push (coro->args, newSVsv (ST (i)));
2855 }
1610} 2856}
1611 OUTPUT: 2857 OUTPUT:
1612 RETVAL 2858 RETVAL
1613 2859
1614# these not obviously related functions are all rolled into the same xs
1615# function to increase chances that they all will call transfer with the same
1616# stack offset
1617void 2860void
1618_set_stacklevel (...) 2861transfer (...)
1619 ALIAS: 2862 PROTOTYPE: $$
1620 Coro::State::transfer = 1 2863 CODE:
1621 Coro::schedule = 2 2864 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1622 Coro::cede = 3
1623 Coro::cede_notself = 4
1624 CODE:
1625{
1626 struct transfer_args ta;
1627
1628 PUTBACK;
1629 switch (ix)
1630 {
1631 case 0:
1632 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1633 ta.next = 0;
1634 break;
1635
1636 case 1:
1637 if (items != 2)
1638 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1639
1640 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1641 break;
1642
1643 case 2:
1644 prepare_schedule (aTHX_ &ta);
1645 break;
1646
1647 case 3:
1648 prepare_cede (aTHX_ &ta);
1649 break;
1650
1651 case 4:
1652 if (!prepare_cede_notself (aTHX_ &ta))
1653 XSRETURN_EMPTY;
1654
1655 break;
1656 }
1657 SPAGAIN;
1658
1659 BARRIER;
1660 PUTBACK;
1661 TRANSFER (ta);
1662 SPAGAIN; /* might be the sp of a different coroutine now */
1663 /* be extra careful not to ever do anything after TRANSFER */
1664}
1665 2865
1666bool 2866bool
1667_destroy (SV *coro_sv) 2867_destroy (SV *coro_sv)
1668 CODE: 2868 CODE:
1669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2869 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1670 OUTPUT: 2870 OUTPUT:
1671 RETVAL 2871 RETVAL
1672 2872
1673void 2873void
1674_exit (code) 2874_exit (int code)
1675 int code
1676 PROTOTYPE: $ 2875 PROTOTYPE: $
1677 CODE: 2876 CODE:
1678 _exit (code); 2877 _exit (code);
1679 2878
1680int 2879int
1681cctx_stacksize (int new_stacksize = 0) 2880cctx_stacksize (int new_stacksize = 0)
2881 PROTOTYPE: ;$
1682 CODE: 2882 CODE:
1683 RETVAL = coro_stacksize; 2883 RETVAL = cctx_stacksize;
1684 if (new_stacksize) 2884 if (new_stacksize)
2885 {
1685 coro_stacksize = new_stacksize; 2886 cctx_stacksize = new_stacksize;
2887 ++cctx_gen;
2888 }
1686 OUTPUT: 2889 OUTPUT:
1687 RETVAL 2890 RETVAL
1688 2891
1689int 2892int
2893cctx_max_idle (int max_idle = 0)
2894 PROTOTYPE: ;$
2895 CODE:
2896 RETVAL = cctx_max_idle;
2897 if (max_idle > 1)
2898 cctx_max_idle = max_idle;
2899 OUTPUT:
2900 RETVAL
2901
2902int
1690cctx_count () 2903cctx_count ()
2904 PROTOTYPE:
1691 CODE: 2905 CODE:
1692 RETVAL = cctx_count; 2906 RETVAL = cctx_count;
1693 OUTPUT: 2907 OUTPUT:
1694 RETVAL 2908 RETVAL
1695 2909
1696int 2910int
1697cctx_idle () 2911cctx_idle ()
2912 PROTOTYPE:
1698 CODE: 2913 CODE:
1699 RETVAL = cctx_idle; 2914 RETVAL = cctx_idle;
1700 OUTPUT: 2915 OUTPUT:
1701 RETVAL 2916 RETVAL
1702 2917
1703void 2918void
1704list () 2919list ()
2920 PROTOTYPE:
1705 PPCODE: 2921 PPCODE:
1706{ 2922{
1707 struct coro *coro; 2923 struct coro *coro;
1708 for (coro = coro_first; coro; coro = coro->next) 2924 for (coro = coro_first; coro; coro = coro->next)
1709 if (coro->hv) 2925 if (coro->hv)
… …
1714call (Coro::State coro, SV *coderef) 2930call (Coro::State coro, SV *coderef)
1715 ALIAS: 2931 ALIAS:
1716 eval = 1 2932 eval = 1
1717 CODE: 2933 CODE:
1718{ 2934{
1719 if (coro->mainstack) 2935 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1720 { 2936 {
1721 struct coro temp; 2937 struct coro temp;
1722 2938
1723 if (!(coro->flags & CF_RUNNING)) 2939 if (!(coro->flags & CF_RUNNING))
1724 { 2940 {
… …
1768 RETVAL = boolSV (coro->flags & ix); 2984 RETVAL = boolSV (coro->flags & ix);
1769 OUTPUT: 2985 OUTPUT:
1770 RETVAL 2986 RETVAL
1771 2987
1772void 2988void
2989throw (Coro::State self, SV *throw = &PL_sv_undef)
2990 PROTOTYPE: $;$
2991 CODE:
2992{
2993 struct coro *current = SvSTATE_current;
2994 SV **throwp = self == current ? &CORO_THROW : &self->except;
2995 SvREFCNT_dec (*throwp);
2996 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2997}
2998
2999void
1773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3000api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3001 PROTOTYPE: $;$
3002 C_ARGS: aTHX_ coro, flags
1774 3003
1775SV * 3004SV *
1776has_stack (Coro::State coro) 3005has_cctx (Coro::State coro)
1777 PROTOTYPE: $ 3006 PROTOTYPE: $
1778 CODE: 3007 CODE:
1779 RETVAL = boolSV (!!coro->cctx); 3008 RETVAL = boolSV (!!coro->cctx);
1780 OUTPUT: 3009 OUTPUT:
1781 RETVAL 3010 RETVAL
… …
1786 CODE: 3015 CODE:
1787 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3016 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1788 OUTPUT: 3017 OUTPUT:
1789 RETVAL 3018 RETVAL
1790 3019
1791IV 3020UV
1792rss (Coro::State coro) 3021rss (Coro::State coro)
1793 PROTOTYPE: $ 3022 PROTOTYPE: $
1794 ALIAS: 3023 ALIAS:
1795 usecount = 1 3024 usecount = 1
1796 CODE: 3025 CODE:
… …
1800 case 1: RETVAL = coro->usecount; break; 3029 case 1: RETVAL = coro->usecount; break;
1801 } 3030 }
1802 OUTPUT: 3031 OUTPUT:
1803 RETVAL 3032 RETVAL
1804 3033
3034void
3035force_cctx ()
3036 PROTOTYPE:
3037 CODE:
3038 SvSTATE_current->cctx->idle_sp = 0;
3039
3040void
3041swap_defsv (Coro::State self)
3042 PROTOTYPE: $
3043 ALIAS:
3044 swap_defav = 1
3045 CODE:
3046 if (!self->slot)
3047 croak ("cannot swap state with coroutine that has no saved state,");
3048 else
3049 {
3050 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3051 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3052
3053 SV *tmp = *src; *src = *dst; *dst = tmp;
3054 }
3055
1805 3056
1806MODULE = Coro::State PACKAGE = Coro 3057MODULE = Coro::State PACKAGE = Coro
1807 3058
1808BOOT: 3059BOOT:
1809{ 3060{
1810 int i; 3061 int i;
1811 3062
1812 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3063 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1813 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3064 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3065 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3066 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3067 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1814 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3068 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3069 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3070 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
1815 3071
1816 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3072 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1817 SvREADONLY_on (coro_current); 3073 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3074 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3075 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1818 3076
1819 coro_stash = gv_stashpv ("Coro", TRUE); 3077 coro_stash = gv_stashpv ("Coro", TRUE);
1820 3078
1821 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3079 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1822 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3080 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1827 3085
1828 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3086 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1829 coro_ready[i] = newAV (); 3087 coro_ready[i] = newAV ();
1830 3088
1831 { 3089 {
1832 SV *sv = perl_get_sv ("Coro::API", TRUE); 3090 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1833 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1834 3091
1835 coroapi.schedule = api_schedule; 3092 coroapi.schedule = api_schedule;
3093 coroapi.schedule_to = api_schedule_to;
1836 coroapi.cede = api_cede; 3094 coroapi.cede = api_cede;
1837 coroapi.cede_notself = api_cede_notself; 3095 coroapi.cede_notself = api_cede_notself;
1838 coroapi.ready = api_ready; 3096 coroapi.ready = api_ready;
1839 coroapi.is_ready = api_is_ready; 3097 coroapi.is_ready = api_is_ready;
1840 coroapi.nready = &coro_nready; 3098 coroapi.nready = coro_nready;
1841 coroapi.current = coro_current; 3099 coroapi.current = coro_current;
1842 3100
1843 GCoroAPI = &coroapi; 3101 /*GCoroAPI = &coroapi;*/
1844 sv_setiv (sv, (IV)&coroapi); 3102 sv_setiv (sv, (IV)&coroapi);
1845 SvREADONLY_on (sv); 3103 SvREADONLY_on (sv);
1846 } 3104 }
1847} 3105}
3106
3107void
3108terminate (...)
3109 CODE:
3110 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3111
3112void
3113schedule (...)
3114 CODE:
3115 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3116
3117void
3118schedule_to (...)
3119 CODE:
3120 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3121
3122void
3123cede_to (...)
3124 CODE:
3125 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3126
3127void
3128cede (...)
3129 CODE:
3130 CORO_EXECUTE_SLF_XS (slf_init_cede);
3131
3132void
3133cede_notself (...)
3134 CODE:
3135 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3136
3137void
3138_cancel (Coro::State self)
3139 CODE:
3140 coro_state_destroy (aTHX_ self);
3141 coro_call_on_destroy (aTHX_ self);
1848 3142
1849void 3143void
1850_set_current (SV *current) 3144_set_current (SV *current)
1851 PROTOTYPE: $ 3145 PROTOTYPE: $
1852 CODE: 3146 CODE:
1853 SvREFCNT_dec (SvRV (coro_current)); 3147 SvREFCNT_dec (SvRV (coro_current));
1854 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3148 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3149
3150void
3151_set_readyhook (SV *hook)
3152 PROTOTYPE: $
3153 CODE:
3154 SvREFCNT_dec (coro_readyhook);
3155 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1855 3156
1856int 3157int
1857prio (Coro::State coro, int newprio = 0) 3158prio (Coro::State coro, int newprio = 0)
3159 PROTOTYPE: $;$
1858 ALIAS: 3160 ALIAS:
1859 nice = 1 3161 nice = 1
1860 CODE: 3162 CODE:
1861{ 3163{
1862 RETVAL = coro->prio; 3164 RETVAL = coro->prio;
… …
1877 3179
1878SV * 3180SV *
1879ready (SV *self) 3181ready (SV *self)
1880 PROTOTYPE: $ 3182 PROTOTYPE: $
1881 CODE: 3183 CODE:
1882 RETVAL = boolSV (api_ready (self)); 3184 RETVAL = boolSV (api_ready (aTHX_ self));
1883 OUTPUT: 3185 OUTPUT:
1884 RETVAL 3186 RETVAL
1885 3187
1886int 3188int
1887nready (...) 3189nready (...)
… …
1890 RETVAL = coro_nready; 3192 RETVAL = coro_nready;
1891 OUTPUT: 3193 OUTPUT:
1892 RETVAL 3194 RETVAL
1893 3195
1894void 3196void
1895throw (Coro::State self, SV *throw = &PL_sv_undef) 3197_pool_handler (...)
1896 PROTOTYPE: $;$ 3198 CODE:
1897 CODE: 3199 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1898 SvREFCNT_dec (self->throw);
1899 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1900 3200
1901# for async_pool speedup
1902void 3201void
1903_pool_1 (SV *cb) 3202async_pool (SV *cv, ...)
3203 PROTOTYPE: &@
3204 PPCODE:
3205{
3206 HV *hv = (HV *)av_pop (av_async_pool);
3207 AV *av = newAV ();
3208 SV *cb = ST (0);
3209 int i;
3210
3211 av_extend (av, items - 2);
3212 for (i = 1; i < items; ++i)
3213 av_push (av, SvREFCNT_inc_NN (ST (i)));
3214
3215 if ((SV *)hv == &PL_sv_undef)
3216 {
3217 PUSHMARK (SP);
3218 EXTEND (SP, 2);
3219 PUSHs (sv_Coro);
3220 PUSHs ((SV *)cv_pool_handler);
3221 PUTBACK;
3222 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3223 SPAGAIN;
3224
3225 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3226 }
3227
3228 {
3229 struct coro *coro = SvSTATE_hv (hv);
3230
3231 assert (!coro->invoke_cb);
3232 assert (!coro->invoke_av);
3233 coro->invoke_cb = SvREFCNT_inc (cb);
3234 coro->invoke_av = av;
3235 }
3236
3237 api_ready (aTHX_ (SV *)hv);
3238
3239 if (GIMME_V != G_VOID)
3240 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3241 else
3242 SvREFCNT_dec (hv);
3243}
3244
3245SV *
3246rouse_cb ()
3247 PROTOTYPE:
1904 CODE: 3248 CODE:
1905{ 3249 RETVAL = coro_new_rouse_cb (aTHX);
1906 struct coro *coro = SvSTATE (coro_current);
1907 HV *hv = (HV *)SvRV (coro_current);
1908 AV *defav = GvAV (PL_defgv);
1909 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1910 AV *invoke_av;
1911 int i, len;
1912
1913 if (!invoke)
1914 croak ("\3async_pool terminate\2\n");
1915
1916 SvREFCNT_dec (coro->saved_deffh);
1917 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1918
1919 hv_store (hv, "desc", sizeof ("desc") - 1,
1920 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1921
1922 invoke_av = (AV *)SvRV (invoke);
1923 len = av_len (invoke_av);
1924
1925 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1926
1927 if (len > 0)
1928 {
1929 av_fill (defav, len - 1);
1930 for (i = 0; i < len; ++i)
1931 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1932 }
1933
1934 SvREFCNT_dec (invoke);
1935}
1936
1937void
1938_pool_2 (SV *cb)
1939 CODE:
1940{
1941 struct coro *coro = SvSTATE (coro_current);
1942
1943 sv_setsv (cb, &PL_sv_undef);
1944
1945 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1946 coro->saved_deffh = 0;
1947
1948 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1949 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1950 croak ("\3async_pool terminate\2\n");
1951
1952 av_clear (GvAV (PL_defgv));
1953 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1954 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1955
1956 coro->prio = 0;
1957
1958 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1959 api_trace (coro_current, 0);
1960
1961 av_push (av_async_pool, newSVsv (coro_current));
1962}
1963
1964
1965MODULE = Coro::State PACKAGE = Coro::AIO
1966
1967SV *
1968_get_state ()
1969 CODE:
1970{
1971 struct io_state *data;
1972
1973 RETVAL = newSV (sizeof (struct io_state));
1974 data = (struct io_state *)SvPVX (RETVAL);
1975 SvCUR_set (RETVAL, sizeof (struct io_state));
1976 SvPOK_only (RETVAL);
1977
1978 data->errorno = errno;
1979 data->laststype = PL_laststype;
1980 data->laststatval = PL_laststatval;
1981 data->statcache = PL_statcache;
1982}
1983 OUTPUT: 3250 OUTPUT:
1984 RETVAL 3251 RETVAL
1985 3252
1986void 3253void
1987_set_state (char *data_) 3254rouse_wait (...)
1988 PROTOTYPE: $ 3255 PROTOTYPE: ;$
3256 PPCODE:
3257 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3258
3259
3260MODULE = Coro::State PACKAGE = PerlIO::cede
3261
3262BOOT:
3263 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3264
3265
3266MODULE = Coro::State PACKAGE = Coro::Semaphore
3267
3268SV *
3269new (SV *klass, SV *count = 0)
1989 CODE: 3270 CODE:
1990{ 3271 RETVAL = sv_bless (
1991 struct io_state *data = (void *)data_; 3272 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3273 GvSTASH (CvGV (cv))
3274 );
3275 OUTPUT:
3276 RETVAL
1992 3277
1993 errno = data->errorno; 3278# helper for Coro::Channel
1994 PL_laststype = data->laststype; 3279SV *
1995 PL_laststatval = data->laststatval; 3280_alloc (int count)
1996 PL_statcache = data->statcache; 3281 CODE:
1997} 3282 RETVAL = coro_waitarray_new (aTHX_ count);
3283 OUTPUT:
3284 RETVAL
1998 3285
3286SV *
3287count (SV *self)
3288 CODE:
3289 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3290 OUTPUT:
3291 RETVAL
3292
3293void
3294up (SV *self, int adjust = 1)
3295 ALIAS:
3296 adjust = 1
3297 CODE:
3298 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3299
3300void
3301down (...)
3302 CODE:
3303 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3304
3305void
3306wait (...)
3307 CODE:
3308 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3309
3310void
3311try (SV *self)
3312 PPCODE:
3313{
3314 AV *av = (AV *)SvRV (self);
3315 SV *count_sv = AvARRAY (av)[0];
3316 IV count = SvIVX (count_sv);
3317
3318 if (count > 0)
3319 {
3320 --count;
3321 SvIVX (count_sv) = count;
3322 XSRETURN_YES;
3323 }
3324 else
3325 XSRETURN_NO;
3326}
3327
3328void
3329waiters (SV *self)
3330 PPCODE:
3331{
3332 AV *av = (AV *)SvRV (self);
3333 int wcount = AvFILLp (av) + 1 - 1;
3334
3335 if (GIMME_V == G_SCALAR)
3336 XPUSHs (sv_2mortal (newSViv (wcount)));
3337 else
3338 {
3339 int i;
3340 EXTEND (SP, wcount);
3341 for (i = 1; i <= wcount; ++i)
3342 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3343 }
3344}
3345
3346MODULE = Coro::State PACKAGE = Coro::Signal
3347
3348SV *
3349new (SV *klass)
3350 CODE:
3351 RETVAL = sv_bless (
3352 coro_waitarray_new (aTHX_ 0),
3353 GvSTASH (CvGV (cv))
3354 );
3355 OUTPUT:
3356 RETVAL
3357
3358void
3359wait (...)
3360 CODE:
3361 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3362
3363void
3364broadcast (SV *self)
3365 CODE:
3366{
3367 AV *av = (AV *)SvRV (self);
3368 coro_signal_wake (aTHX_ av, AvFILLp (av));
3369}
3370
3371void
3372send (SV *self)
3373 CODE:
3374{
3375 AV *av = (AV *)SvRV (self);
3376
3377 if (AvFILLp (av))
3378 coro_signal_wake (aTHX_ av, 1);
3379 else
3380 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3381}
3382
3383IV
3384awaited (SV *self)
3385 CODE:
3386 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3387 OUTPUT:
3388 RETVAL
3389
3390
3391MODULE = Coro::State PACKAGE = Coro::AnyEvent
3392
3393BOOT:
3394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3395
3396void
3397_schedule (...)
3398 CODE:
3399{
3400 static int incede;
3401
3402 api_cede_notself (aTHX);
3403
3404 ++incede;
3405 while (coro_nready >= incede && api_cede (aTHX))
3406 ;
3407
3408 sv_setsv (sv_activity, &PL_sv_undef);
3409 if (coro_nready >= incede)
3410 {
3411 PUSHMARK (SP);
3412 PUTBACK;
3413 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3414 }
3415
3416 --incede;
3417}
3418
3419
3420MODULE = Coro::State PACKAGE = Coro::AIO
3421
3422void
3423_register (char *target, char *proto, SV *req)
3424 CODE:
3425{
3426 CV *req_cv = coro_sv_2cv (aTHX_ req);
3427 /* newXSproto doesn't return the CV on 5.8 */
3428 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3429 sv_setpv ((SV *)slf_cv, proto);
3430 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3431}
3432

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