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Comparing Coro/Coro/State.xs (file contents):
Revision 1.198 by root, Sun Oct 7 03:58:37 2007 UTC vs.
Revision 1.317 by root, Thu Nov 20 06:28:52 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
23# include <inttypes.h> /* most portable stdint.h */
24#endif
15 25
16#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
17# include <unistd.h> 27# include <unistd.h>
18# include <sys/mman.h> 28# include <sys/mman.h>
19# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
36# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
37#endif 47#endif
38 48
39#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
40# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
41# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
42#else
43# define REGISTER_STACK(cctx,start,end)
44#endif 51#endif
45 52
46/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
47#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
48 55
49#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
50 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
51 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
52 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
53 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
54 61
55#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
56# ifndef PL_ppaddr 63# ifndef PL_ppaddr
57# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
58# endif 65# endif
… …
71# ifndef IS_PADCONST 78# ifndef IS_PADCONST
72# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
73# endif 80# endif
74#endif 81#endif
75 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
76/* 5.8.7 */ 107/* 5.8.7 */
77#ifndef SvRV_set 108#ifndef SvRV_set
78# define SvRV_set(s,v) SvRV(s) = (v) 109# define SvRV_set(s,v) SvRV(s) = (v)
79#endif 110#endif
80 111
81/* 5.8.8 */
82#ifndef GV_NOTQUAL
83# define GV_NOTQUAL 0
84#endif
85#ifndef newSV
86# define newSV(l) NEWSV(0,l)
87#endif
88
89#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
90# undef CORO_STACKGUARD 113# undef CORO_STACKGUARD
91#endif 114#endif
92 115
93#ifndef CORO_STACKGUARD 116#ifndef CORO_STACKGUARD
… …
99# define CORO_PREFER_PERL_FUNCTIONS 0 122# define CORO_PREFER_PERL_FUNCTIONS 0
100#endif 123#endif
101 124
102/* 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
103 * 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
104#define dSTACKLEVEL volatile char stacklevel 131# define dSTACKLEVEL volatile void *stacklevel
105#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
106 134
107#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
108 136
109#if __GNUC__ >= 3 137#if __GNUC__ >= 3
110# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
111# define BARRIER __asm__ __volatile__ ("" : : : "memory")
112# define expect(expr,value) __builtin_expect ((expr),(value)) 139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
113#else 141#else
114# define attribute(x) 142# define attribute(x)
115# define BARRIER
116# define expect(expr,value) (expr) 143# define expect(expr,value) (expr)
144# define INLINE static
117#endif 145#endif
118 146
119#define expect_false(expr) expect ((expr) != 0, 0) 147#define expect_false(expr) expect ((expr) != 0, 0)
120#define expect_true(expr) expect ((expr) != 0, 1) 148#define expect_true(expr) expect ((expr) != 0, 1)
121 149
122#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
123 151
124#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
125 154
126#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
127static perl_mutex coro_mutex; 156# if CORO_PTHREAD
128# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static void *coro_thx;
129# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
130#else
131# define LOCK (void)0
132# define UNLOCK (void)0
133#endif 158# endif
159#endif
134 160
135/* helper storage struct for Coro::AIO */ 161static double (*nvtime)(); /* so why doesn't it take void? */
136struct io_state
137{
138 int errorno;
139 I32 laststype;
140 int laststatval;
141 Stat_t statcache;
142};
143 162
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;
144static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
145static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
146static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
147static JMPENV *main_top_env; 171static JMPENV *main_top_env;
148static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
149static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
150 174
151static GV *irsgv; /* $/ */ 175static GV *irsgv; /* $/ */
152static GV *stdoutgv; /* *STDOUT */ 176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
153 180
154/* async_pool helper stuff */ 181/* async_pool helper stuff */
155static SV *sv_pool_rss; 182static SV *sv_pool_rss;
156static SV *sv_pool_size; 183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
157static AV *av_async_pool; 185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_state_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
158 192
159static struct coro_cctx *cctx_first; 193static struct coro_cctx *cctx_first;
160static int cctx_count, cctx_idle; 194static int cctx_count, cctx_idle;
161 195
162enum { 196enum {
… …
167 CC_TRACE_LINE = 0x10, /* trace each statement */ 201 CC_TRACE_LINE = 0x10, /* trace each statement */
168 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
169}; 203};
170 204
171/* this is a structure representing a c-level coroutine */ 205/* this is a structure representing a c-level coroutine */
172typedef struct coro_cctx { 206typedef struct coro_cctx
207{
173 struct coro_cctx *next; 208 struct coro_cctx *next;
174 209
175 /* the stack */ 210 /* the stack */
176 void *sptr; 211 void *sptr;
177 size_t ssize; 212 size_t ssize;
… …
180 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 215 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
181 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
182 JMPENV *top_env; 217 JMPENV *top_env;
183 coro_context cctx; 218 coro_context cctx;
184 219
220 U32 gen;
185#if CORO_USE_VALGRIND 221#if CORO_USE_VALGRIND
186 int valgrind_id; 222 int valgrind_id;
187#endif 223#endif
188 unsigned char flags; 224 unsigned char flags;
189} coro_cctx; 225} coro_cctx;
… …
194 CF_NEW = 0x0004, /* has never been switched to */ 230 CF_NEW = 0x0004, /* has never been switched to */
195 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
196}; 232};
197 233
198/* the structure where most of the perl state is stored, overlaid on the cxstack */ 234/* the structure where most of the perl state is stored, overlaid on the cxstack */
199typedef struct { 235typedef struct
236{
200 SV *defsv; 237 SV *defsv;
201 AV *defav; 238 AV *defav;
202 SV *errsv; 239 SV *errsv;
203 SV *irsgv; 240 SV *irsgv;
204#define VAR(name,type) type name; 241#define VAR(name,type) type name;
… …
208 245
209#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
210 247
211/* this is a structure representing a perl-level coroutine */ 248/* this is a structure representing a perl-level coroutine */
212struct coro { 249struct coro {
213 /* the c coroutine allocated to this perl coroutine, if any */ 250 /* the C coroutine allocated to this perl coroutine, if any */
214 coro_cctx *cctx; 251 coro_cctx *cctx;
215 252
216 /* process data */ 253 /* state data */
254 struct CoroSLF slf_frame; /* saved slf frame */
217 AV *mainstack; 255 AV *mainstack;
218 perl_slots *slot; /* basically the saved sp */ 256 perl_slots *slot; /* basically the saved sp */
219 257
258 CV *startcv; /* the CV to execute */
220 /* data associated with this coroutine (initial args) */ 259 AV *args; /* data associated with this coroutine (initial args) */
221 AV *args; 260 int refcnt; /* coroutines are refcounted, yes */
222 int refcnt;
223 int flags; /* CF_ flags */ 261 int flags; /* CF_ flags */
262 HV *hv; /* the perl hash associated with this coro, if any */
263 void (*on_destroy)(pTHX_ struct coro *coro);
224 264
225 /* statistics */ 265 /* statistics */
226 int usecount; /* number of transfers to this coro */ 266 int usecount; /* number of transfers to this coro */
227 267
228 /* coro process data */ 268 /* coro process data */
229 int prio; 269 int prio;
230 SV *throw; 270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
231 272
232 /* async_pool */ 273 /* async_pool */
233 SV *saved_deffh; 274 SV *saved_deffh;
275 SV *invoke_cb;
276 AV *invoke_av;
234 277
235 /* linked list */ 278 /* linked list */
236 struct coro *next, *prev; 279 struct coro *next, *prev;
237 HV *hv; /* the perl hash associated with this coro, if any */
238}; 280};
239 281
240typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
241typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
242 289
243/** Coro ********************************************************************/ 290/** Coro ********************************************************************/
244 291
245#define PRIO_MAX 3 292#define PRIO_MAX 3
246#define PRIO_HIGH 1 293#define PRIO_HIGH 1
… …
249#define PRIO_IDLE -3 296#define PRIO_IDLE -3
250#define PRIO_MIN -4 297#define PRIO_MIN -4
251 298
252/* for Coro.pm */ 299/* for Coro.pm */
253static SV *coro_current; 300static SV *coro_current;
301static SV *coro_readyhook;
254static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
255static int coro_nready; 303static CV *cv_coro_run, *cv_coro_terminate;
256static struct coro *coro_first; 304static struct coro *coro_first;
305#define coro_nready coroapi.nready
257 306
258/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
259 347
260static AV * 348static AV *
261coro_clone_padlist (pTHX_ CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
262{ 350{
263 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
264 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
265 353
266 newpadlist = newAV (); 354 newpadlist = newAV ();
267 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
268#if PERL_VERSION_ATLEAST (5,9,0) 356#if PERL_VERSION_ATLEAST (5,10,0)
269 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
270#else 358#else
271 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
272#endif 360#endif
273 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
274 --AvFILLp (padlist); 362 --AvFILLp (padlist);
275 363
276 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
277 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
278 366
279 return newpadlist; 367 return newpadlist;
280} 368}
281 369
… …
311 399
312 /* casting is fun. */ 400 /* casting is fun. */
313 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
314 free_padlist (aTHX_ padlist); 402 free_padlist (aTHX_ padlist);
315 403
316 SvREFCNT_dec (av); 404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
317 405
318 return 0; 406 return 0;
319} 407}
320 408
409#define CORO_MAGIC_type_cv 26
321#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
322 411
323static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 412static MGVTBL coro_cv_vtbl = {
413 0, 0, 0, 0,
414 coro_cv_free
415};
324 416
325#define CORO_MAGIC(cv) \ 417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
326 SvMAGIC (cv) \ 419 ? SvMAGIC (sv) \
327 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 420 : mg_find (sv, type))
328 ? SvMAGIC (cv) \ 421
329 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 422#define CORO_MAGIC(sv, type) \
423 (expect_true (SvMAGIC (sv)) \
424 ? CORO_MAGIC_NN (sv, type) \
330 : 0 425 : 0)
331 426
332static struct coro * 427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
429
430INLINE struct coro *
333SvSTATE_ (pTHX_ SV *coro) 431SvSTATE_ (pTHX_ SV *coro)
334{ 432{
335 HV *stash; 433 HV *stash;
336 MAGIC *mg; 434 MAGIC *mg;
337 435
… …
347 /* very slow, but rare, check */ 445 /* very slow, but rare, check */
348 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State")) 446 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
349 croak ("Coro::State object required"); 447 croak ("Coro::State object required");
350 } 448 }
351 449
352 mg = CORO_MAGIC (coro); 450 mg = CORO_MAGIC_state (coro);
353 return (struct coro *)mg->mg_ptr; 451 return (struct coro *)mg->mg_ptr;
354} 452}
355 453
356#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
357 455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
459
358/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
359static void 461static void
360get_padlist (pTHX_ CV *cv) 462get_padlist (pTHX_ CV *cv)
361{ 463{
362 MAGIC *mg = CORO_MAGIC (cv); 464 MAGIC *mg = CORO_MAGIC_cv (cv);
363 AV *av; 465 AV *av;
364 466
365 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
366 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
367 else 469 else
368 { 470 {
369#if CORO_PREFER_PERL_FUNCTIONS 471#if CORO_PREFER_PERL_FUNCTIONS
370 /* this is probably cleaner, but also slower? */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
371 CV *cp = Perl_cv_clone (cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
372 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
373 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
374 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
375#else 478#else
376 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 479 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
379} 482}
380 483
381static void 484static void
382put_padlist (pTHX_ CV *cv) 485put_padlist (pTHX_ CV *cv)
383{ 486{
384 MAGIC *mg = CORO_MAGIC (cv); 487 MAGIC *mg = CORO_MAGIC_cv (cv);
385 AV *av; 488 AV *av;
386 489
387 if (expect_false (!mg)) 490 if (expect_false (!mg))
388 { 491 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
389 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
390 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
391 mg->mg_virtual = &vtbl_coro;
392 mg->mg_obj = (SV *)newAV ();
393 }
394 492
395 av = (AV *)mg->mg_obj; 493 av = (AV *)mg->mg_obj;
396 494
397 if (expect_false (AvFILLp (av) >= AvMAX (av))) 495 if (expect_false (AvFILLp (av) >= AvMAX (av)))
398 av_extend (av, AvMAX (av) + 1); 496 av_extend (av, AvMAX (av) + 1);
… …
432 CvPADLIST (cv) = (AV *)POPs; 530 CvPADLIST (cv) = (AV *)POPs;
433 } 531 }
434 532
435 PUTBACK; 533 PUTBACK;
436 } 534 }
535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
437} 538}
438 539
439static void 540static void
440save_perl (pTHX_ Coro__State c) 541save_perl (pTHX_ Coro__State c)
441{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
442 { 546 {
443 dSP; 547 dSP;
444 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
445 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
446 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
464 568
465 if (expect_true (CvDEPTH (cv))) 569 if (expect_true (CvDEPTH (cv)))
466 { 570 {
467 EXTEND (SP, 3); 571 EXTEND (SP, 3);
468 PUSHs ((SV *)CvPADLIST (cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
469 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
470 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
471 575
472 CvDEPTH (cv) = 0; 576 CvDEPTH (cv) = 0;
473 get_padlist (aTHX_ cv); 577 get_padlist (aTHX_ cv);
474 } 578 }
… …
485 589
486 PUTBACK; 590 PUTBACK;
487 } 591 }
488 592
489 /* allocate some space on the context stack for our purposes */ 593 /* allocate some space on the context stack for our purposes */
594 /* we manually unroll here, as usually 2 slots is enough */
595 if (SLOT_COUNT >= 1) CXINC;
596 if (SLOT_COUNT >= 2) CXINC;
597 if (SLOT_COUNT >= 3) CXINC;
490 { 598 {
491 /* we manually unroll here, as usually 2 slots is enough */
492 int i; 599 int i;
493 if (SLOT_COUNT >= 1) CXINC;
494 if (SLOT_COUNT >= 2) CXINC;
495 if (SLOT_COUNT >= 3) CXINC;
496 for (i = 3; i < SLOT_COUNT; ++i) 600 for (i = 3; i < SLOT_COUNT; ++i)
497 CXINC; 601 CXINC;
498
499 cxstack_ix -= SLOT_COUNT; /* undo allocation */
500 } 602 }
603 cxstack_ix -= SLOT_COUNT; /* undo allocation */
501 604
502 c->mainstack = PL_mainstack; 605 c->mainstack = PL_mainstack;
503 606
504 { 607 {
505 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 608 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
… …
514 #undef VAR 617 #undef VAR
515 } 618 }
516} 619}
517 620
518/* 621/*
519 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
520 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
521 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
522 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
523 */ 626 */
524#if CORO_PREFER_PERL_FUNCTIONS 627#if CORO_PREFER_PERL_FUNCTIONS
525# define coro_init_stacks init_stacks 628# define coro_init_stacks(thx) init_stacks ()
526#else 629#else
527static void 630static void
528coro_init_stacks (pTHX) 631coro_init_stacks (pTHX)
529{ 632{
530 PL_curstackinfo = new_stackinfo(32, 8); 633 PL_curstackinfo = new_stackinfo(32, 8);
… …
555 658
556 New(54,PL_savestack,24,ANY); 659 New(54,PL_savestack,24,ANY);
557 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
558 PL_savestack_max = 24; 661 PL_savestack_max = 24;
559 662
560#if !PERL_VERSION_ATLEAST (5,9,0) 663#if !PERL_VERSION_ATLEAST (5,10,0)
561 New(54,PL_retstack,4,OP*); 664 New(54,PL_retstack,4,OP*);
562 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
563 PL_retstack_max = 4; 666 PL_retstack_max = 4;
564#endif 667#endif
565} 668}
… …
567 670
568/* 671/*
569 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
570 */ 673 */
571static void 674static void
572coro_destroy_stacks (pTHX) 675coro_destruct_stacks (pTHX)
573{ 676{
574 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
575 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
576 679
577 while (PL_curstackinfo) 680 while (PL_curstackinfo)
… …
588 691
589 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
590 Safefree (PL_markstack); 693 Safefree (PL_markstack);
591 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
592 Safefree (PL_savestack); 695 Safefree (PL_savestack);
593#if !PERL_VERSION_ATLEAST (5,9,0) 696#if !PERL_VERSION_ATLEAST (5,10,0)
594 Safefree (PL_retstack); 697 Safefree (PL_retstack);
595#endif 698#endif
596} 699}
700
701#define CORO_RSS \
702 rss += sizeof (SYM (curstackinfo)); \
703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
597 709
598static size_t 710static size_t
599coro_rss (pTHX_ struct coro *coro) 711coro_rss (pTHX_ struct coro *coro)
600{ 712{
601 size_t rss = sizeof (*coro); 713 size_t rss = sizeof (*coro);
602 714
603 if (coro->mainstack) 715 if (coro->mainstack)
604 { 716 {
605 perl_slots tmp_slot;
606 perl_slots *slot;
607
608 if (coro->flags & CF_RUNNING) 717 if (coro->flags & CF_RUNNING)
609 { 718 {
610 slot = &tmp_slot; 719 #define SYM(sym) PL_ ## sym
611 720 CORO_RSS;
612 #define VAR(name,type) slot->name = PL_ ## name;
613 # include "state.h"
614 #undef VAR 721 #undef SYM
615 } 722 }
616 else 723 else
617 slot = coro->slot; 724 {
618 725 #define SYM(sym) coro->slot->sym
619 rss += sizeof (slot->curstackinfo); 726 CORO_RSS;
620 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 727 #undef SYM
621 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 728 }
622 rss += slot->tmps_max * sizeof (SV *);
623 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
624 rss += slot->scopestack_max * sizeof (I32);
625 rss += slot->savestack_max * sizeof (ANY);
626
627#if !PERL_VERSION_ATLEAST (5,9,0)
628 rss += slot->retstack_max * sizeof (OP *);
629#endif
630 } 729 }
631 730
632 return rss; 731 return rss;
633} 732}
634 733
635/** coroutine stack handling ************************************************/ 734/** coroutine stack handling ************************************************/
636 735
736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
746
747/*
748 * This overrides the default magic get method of %SIG elements.
749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
750 * and instead of tryign to save and restore the hash elements, we just provide
751 * readback here.
752 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
753 * not expecting this to actually change the hook. This is a potential problem
754 * when a schedule happens then, but we ignore this.
755 */
637static void 756static int
757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
758{
759 const char *s = MgPV_nolen_const (mg);
760
761 if (*s == '_')
762 {
763 SV **svp = 0;
764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
769 {
770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
771 return 0;
772 }
773 }
774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
784 {
785 SV **svp = 0;
786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
824}
825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
638coro_setup (pTHX_ struct coro *coro) 842coro_setup (pTHX_ struct coro *coro)
639{ 843{
640 /* 844 /*
641 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
642 */ 846 */
… …
649 PL_curpm = 0; 853 PL_curpm = 0;
650 PL_curpad = 0; 854 PL_curpad = 0;
651 PL_localizing = 0; 855 PL_localizing = 0;
652 PL_dirty = 0; 856 PL_dirty = 0;
653 PL_restartop = 0; 857 PL_restartop = 0;
654 PL_diehook = 0; 858#if PERL_VERSION_ATLEAST (5,10,0)
655 PL_warnhook = 0; 859 PL_parser = 0;
860#endif
861
862 /* recreate the die/warn hooks */
863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
656 865
657 GvSV (PL_defgv) = newSV (0); 866 GvSV (PL_defgv) = newSV (0);
658 GvAV (PL_defgv) = coro->args; coro->args = 0; 867 GvAV (PL_defgv) = coro->args; coro->args = 0;
659 GvSV (PL_errgv) = newSV (0); 868 GvSV (PL_errgv) = newSV (0);
660 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
661 PL_rs = newSVsv (GvSV (irsgv)); 870 PL_rs = newSVsv (GvSV (irsgv));
662 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
663 872
664 { 873 {
665 dSP; 874 dSP;
666 LOGOP myop; 875 UNOP myop;
667 876
668 Zero (&myop, 1, LOGOP); 877 Zero (&myop, 1, UNOP);
669 myop.op_next = Nullop; 878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
670 myop.op_flags = OPf_WANT_VOID; 880 myop.op_flags = OPf_WANT_VOID;
671 881
672 PUSHMARK (SP); 882 PUSHMARK (SP);
673 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 883 PUSHs ((SV *)coro->startcv);
674 PUTBACK; 884 PUTBACK;
675 PL_op = (OP *)&myop; 885 PL_op = (OP *)&myop;
676 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677 SPAGAIN;
678 } 887 }
679 888
680 ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */ 889 /* this newly created coroutine might be run on an existing cctx which most
681} 890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
891 */
892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
682 894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
683static void 907static void
684coro_destroy (pTHX_ struct coro *coro) 908coro_destruct (pTHX_ struct coro *coro)
685{ 909{
686 if (!IN_DESTRUCT) 910 if (!IN_DESTRUCT)
687 { 911 {
688 /* restore all saved variables and stuff */ 912 /* restore all saved variables and stuff */
689 LEAVE_SCOPE (0); 913 LEAVE_SCOPE (0);
… …
709 933
710 SvREFCNT_dec (PL_diehook); 934 SvREFCNT_dec (PL_diehook);
711 SvREFCNT_dec (PL_warnhook); 935 SvREFCNT_dec (PL_warnhook);
712 936
713 SvREFCNT_dec (coro->saved_deffh); 937 SvREFCNT_dec (coro->saved_deffh);
714 SvREFCNT_dec (coro->throw); 938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
715 941
716 coro_destroy_stacks (aTHX); 942 coro_destruct_stacks (aTHX);
717} 943}
718 944
719static void 945INLINE void
720free_coro_mortal (pTHX) 946free_coro_mortal (pTHX)
721{ 947{
722 if (expect_true (coro_mortal)) 948 if (expect_true (coro_mortal))
723 { 949 {
724 SvREFCNT_dec (coro_mortal); 950 SvREFCNT_dec (coro_mortal);
… …
729static int 955static int
730runops_trace (pTHX) 956runops_trace (pTHX)
731{ 957{
732 COP *oldcop = 0; 958 COP *oldcop = 0;
733 int oldcxix = -2; 959 int oldcxix = -2;
734 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
735 coro_cctx *cctx = coro->cctx; 961 coro_cctx *cctx = coro->cctx;
736 962
737 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
738 { 964 {
739 PERL_ASYNC_CHECK (); 965 PERL_ASYNC_CHECK ();
… …
758 : cx->blk_gimme == G_SCALAR ? bot + 1 984 : cx->blk_gimme == G_SCALAR ? bot + 1
759 : bot; 985 : bot;
760 986
761 av_extend (av, top - bot); 987 av_extend (av, top - bot);
762 while (bot < top) 988 while (bot < top)
763 av_push (av, SvREFCNT_inc (*bot++)); 989 av_push (av, SvREFCNT_inc_NN (*bot++));
764 990
765 PL_runops = RUNOPS_DEFAULT; 991 PL_runops = RUNOPS_DEFAULT;
766 ENTER; 992 ENTER;
767 SAVETMPS; 993 SAVETMPS;
768 EXTEND (SP, 3); 994 EXTEND (SP, 3);
… …
806 SAVETMPS; 1032 SAVETMPS;
807 EXTEND (SP, 3); 1033 EXTEND (SP, 3);
808 PUSHMARK (SP); 1034 PUSHMARK (SP);
809 PUSHs (&PL_sv_yes); 1035 PUSHs (&PL_sv_yes);
810 PUSHs (fullname); 1036 PUSHs (fullname);
811 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
812 PUTBACK; 1038 PUTBACK;
813 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
814 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
815 SPAGAIN; 1041 SPAGAIN;
816 FREETMPS; 1042 FREETMPS;
… …
848 1074
849 TAINT_NOT; 1075 TAINT_NOT;
850 return 0; 1076 return 0;
851} 1077}
852 1078
853/* inject a fake call to Coro::State::_cctx_init into the execution */ 1079static struct coro_cctx *cctx_ssl_cctx;
854/* _cctx_init should be careful, as it could be called at almost any time */ 1080static struct CoroSLF cctx_ssl_frame;
855/* during execution of a perl program */ 1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
856static void NOINLINE 1098static void NOINLINE
857prepare_cctx (pTHX_ coro_cctx *cctx) 1099cctx_prepare (pTHX_ coro_cctx *cctx)
858{ 1100{
859 dSP;
860 LOGOP myop;
861
862 PL_top_env = &PL_start_env; 1101 PL_top_env = &PL_start_env;
863 1102
864 if (cctx->flags & CC_TRACE) 1103 if (cctx->flags & CC_TRACE)
865 PL_runops = runops_trace; 1104 PL_runops = runops_trace;
866 1105
867 Zero (&myop, 1, LOGOP); 1106 /* we already must be executing an SLF op, there is no other valid way
868 myop.op_next = PL_op; 1107 * that can lead to creation of a new cctx */
869 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
870 1110
871 PUSHMARK (SP); 1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
872 EXTEND (SP, 2); 1112 cctx_ssl_cctx = cctx;
873 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1113 cctx_ssl_frame = slf_frame;
874 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1114
875 PUTBACK; 1115 slf_frame.prepare = slf_prepare_set_stacklevel;
876 PL_op = (OP *)&myop; 1116 slf_frame.check = slf_check_set_stacklevel;
877 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1117}
878 SPAGAIN; 1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
879} 1124}
880 1125
881/* 1126/*
882 * this is a _very_ stripped down perl interpreter ;) 1127 * this is a _very_ stripped down perl interpreter ;)
883 */ 1128 */
884static void 1129static void
885coro_run (void *arg) 1130cctx_run (void *arg)
886{ 1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
887 dTHX; 1138 dTHX;
888 1139
889 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1140 /* normally we would need to skip the entersub here */
890 UNLOCK; 1141 /* not doing so will re-execute it, which is exactly what we want */
891
892 /* we now skip the entersub that lead to transfer() */
893 PL_op = PL_op->op_next; 1142 /* PL_nop = PL_nop->op_next */
894 1143
895 /* inject a fake subroutine call to cctx_init */ 1144 /* inject a fake subroutine call to cctx_init */
896 prepare_cctx (aTHX_ (coro_cctx *)arg); 1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
897 1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
898 /* somebody or something will hit me for both perl_run and PL_restartop */ 1150 /* somebody or something will hit me for both perl_run and PL_restartop */
899 PL_restartop = PL_op; 1151 PL_restartop = PL_op;
900 perl_run (PL_curinterp); 1152 perl_run (PL_curinterp);
901
902 /* 1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
1157
1158 /*
903 * If perl-run returns we assume exit() was being called or the coro 1159 * If perl-run returns we assume exit() was being called or the coro
904 * fell off the end, which seems to be the only valid (non-bug) 1160 * fell off the end, which seems to be the only valid (non-bug)
905 * reason for perl_run to return. We try to exit by jumping to the 1161 * reason for perl_run to return. We try to exit by jumping to the
906 * bootstrap-time "top" top_env, as we cannot restore the "main" 1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
907 * coroutine as Coro has no such concept 1163 * coroutine as Coro has no such concept
908 */ 1164 */
909 PL_top_env = main_top_env; 1165 PL_top_env = main_top_env;
910 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
911} 1168}
912 1169
913static coro_cctx * 1170static coro_cctx *
914cctx_new () 1171cctx_new ()
915{ 1172{
916 coro_cctx *cctx; 1173 coro_cctx *cctx;
1174
1175 ++cctx_count;
1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
917 void *stack_start; 1202 void *stack_start;
918 size_t stack_size; 1203 size_t stack_size;
919 1204
920 ++cctx_count;
921
922 Newz (0, cctx, 1, coro_cctx);
923
924#if HAVE_MMAP 1205#if HAVE_MMAP
925
926 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
927 /* mmap supposedly does allocate-on-write for us */ 1207 /* mmap supposedly does allocate-on-write for us */
928 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
929 1209
930 if (cctx->sptr != (void *)-1) 1210 if (cctx->sptr != (void *)-1)
931 { 1211 {
932# if CORO_STACKGUARD 1212 #if CORO_STACKGUARD
933 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
934# endif 1214 #endif
935 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
936 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
937 cctx->flags |= CC_MAPPED; 1217 cctx->flags |= CC_MAPPED;
938 } 1218 }
939 else 1219 else
940#endif 1220#endif
941 { 1221 {
942 cctx->ssize = coro_stacksize * (long)sizeof (long); 1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
943 New (0, cctx->sptr, coro_stacksize, long); 1223 New (0, cctx->sptr, cctx_stacksize, long);
944 1224
945 if (!cctx->sptr) 1225 if (!cctx->sptr)
946 { 1226 {
947 perror ("FATAL: unable to allocate stack for coroutine"); 1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
948 _exit (EXIT_FAILURE); 1228 _exit (EXIT_FAILURE);
949 } 1229 }
950 1230
951 stack_start = cctx->sptr; 1231 stack_start = cctx->sptr;
952 stack_size = cctx->ssize; 1232 stack_size = cctx->ssize;
953 } 1233 }
954 1234
955 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1237 #endif
1238
956 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
957 1240
958 return cctx; 1241 return cctx;
959} 1242}
960 1243
961static void 1244static void
… …
963{ 1246{
964 if (!cctx) 1247 if (!cctx)
965 return; 1248 return;
966 1249
967 --cctx_count; 1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
968 1252
1253 /* coro_transfer creates new, empty cctx's */
1254 if (cctx->sptr)
1255 {
969#if CORO_USE_VALGRIND 1256 #if CORO_USE_VALGRIND
970 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
971#endif 1258 #endif
972 1259
973#if HAVE_MMAP 1260#if HAVE_MMAP
974 if (cctx->flags & CC_MAPPED) 1261 if (cctx->flags & CC_MAPPED)
975 munmap (cctx->sptr, cctx->ssize); 1262 munmap (cctx->sptr, cctx->ssize);
976 else 1263 else
977#endif 1264#endif
978 Safefree (cctx->sptr); 1265 Safefree (cctx->sptr);
1266 }
979 1267
980 Safefree (cctx); 1268 Safefree (cctx);
981} 1269}
982 1270
983/* wether this cctx should be destructed */ 1271/* wether this cctx should be destructed */
984#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
985 1273
986static coro_cctx * 1274static coro_cctx *
987cctx_get (pTHX) 1275cctx_get (pTHX)
988{ 1276{
989 while (expect_true (cctx_first)) 1277 while (expect_true (cctx_first))
… …
996 return cctx; 1284 return cctx;
997 1285
998 cctx_destroy (cctx); 1286 cctx_destroy (cctx);
999 } 1287 }
1000 1288
1001 return cctx_new (); 1289 return cctx_new_run ();
1002} 1290}
1003 1291
1004static void 1292static void
1005cctx_put (coro_cctx *cctx) 1293cctx_put (coro_cctx *cctx)
1006{ 1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
1007 /* free another cctx if overlimit */ 1297 /* free another cctx if overlimit */
1008 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1298 if (expect_false (cctx_idle >= cctx_max_idle))
1009 { 1299 {
1010 coro_cctx *first = cctx_first; 1300 coro_cctx *first = cctx_first;
1011 cctx_first = first->next; 1301 cctx_first = first->next;
1012 --cctx_idle; 1302 --cctx_idle;
1013 1303
… …
1022/** coroutine switching *****************************************************/ 1312/** coroutine switching *****************************************************/
1023 1313
1024static void 1314static void
1025transfer_check (pTHX_ struct coro *prev, struct coro *next) 1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1026{ 1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1027 if (expect_true (prev != next)) 1319 if (expect_true (prev != next))
1028 { 1320 {
1029 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1030 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1031 1323
1032 if (expect_false (next->flags & CF_RUNNING)) 1324 if (expect_false (next->flags & CF_RUNNING))
1033 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1034 1326
1035 if (expect_false (next->flags & CF_DESTROYED)) 1327 if (expect_false (next->flags & CF_DESTROYED))
1036 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1037 1329
1038 if (
1039#if PERL_VERSION_ATLEAST (5,9,0) 1330#if !PERL_VERSION_ATLEAST (5,10,0)
1040 expect_false (PL_parser)
1041#else
1042 expect_false (PL_lex_state != LEX_NOTPARSING) 1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1043#endif
1044 )
1045 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1046 } 1334 }
1047} 1335}
1048 1336
1049/* always use the TRANSFER macro */ 1337/* always use the TRANSFER macro */
1050static void NOINLINE 1338static void NOINLINE /* noinline so we have a fixed stackframe */
1051transfer (pTHX_ struct coro *prev, struct coro *next) 1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1052{ 1340{
1053 dSTACKLEVEL; 1341 dSTACKLEVEL;
1054 1342
1055 /* sometimes transfer is only called to set idle_sp */ 1343 /* sometimes transfer is only called to set idle_sp */
1056 if (expect_false (!next)) 1344 if (expect_false (!next))
… …
1062 { 1350 {
1063 coro_cctx *prev__cctx; 1351 coro_cctx *prev__cctx;
1064 1352
1065 if (expect_false (prev->flags & CF_NEW)) 1353 if (expect_false (prev->flags & CF_NEW))
1066 { 1354 {
1067 /* create a new empty context */ 1355 /* create a new empty/source context */
1068 Newz (0, prev->cctx, 1, coro_cctx); 1356 prev->cctx = cctx_new_empty ();
1069 prev->flags &= ~CF_NEW; 1357 prev->flags &= ~CF_NEW;
1070 prev->flags |= CF_RUNNING; 1358 prev->flags |= CF_RUNNING;
1071 } 1359 }
1072 1360
1073 prev->flags &= ~CF_RUNNING; 1361 prev->flags &= ~CF_RUNNING;
1074 next->flags |= CF_RUNNING; 1362 next->flags |= CF_RUNNING;
1075 1363
1076 LOCK; 1364 /* first get rid of the old state */
1365 save_perl (aTHX_ prev);
1077 1366
1078 if (expect_false (next->flags & CF_NEW)) 1367 if (expect_false (next->flags & CF_NEW))
1079 { 1368 {
1080 /* need to start coroutine */ 1369 /* need to start coroutine */
1081 next->flags &= ~CF_NEW; 1370 next->flags &= ~CF_NEW;
1082 /* first get rid of the old state */
1083 save_perl (aTHX_ prev);
1084 /* setup coroutine call */ 1371 /* setup coroutine call */
1085 coro_setup (aTHX_ next); 1372 coro_setup (aTHX_ next);
1086 } 1373 }
1087 else 1374 else
1375 load_perl (aTHX_ next);
1376
1377 prev__cctx = prev->cctx;
1378
1379 /* possibly untie and reuse the cctx */
1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
1088 { 1385 {
1089 /* coroutine already started */
1090 save_perl (aTHX_ prev);
1091 load_perl (aTHX_ next);
1092 }
1093
1094 prev__cctx = prev->cctx;
1095
1096 /* possibly "free" the cctx */
1097 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
1098 {
1099 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1100 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1101 1388
1102 prev->cctx = 0; 1389 prev->cctx = 0;
1103 1390
1104 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1105 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1106 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1393 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1394 if (!next->cctx)
1107 next->cctx = cctx_get (aTHX); 1395 next->cctx = cctx_get (aTHX);
1108 1396
1109 cctx_put (prev__cctx); 1397 cctx_put (prev__cctx);
1110 } 1398 }
1111 1399
1112 ++next->usecount; 1400 ++next->usecount;
… …
1119 prev__cctx->top_env = PL_top_env; 1407 prev__cctx->top_env = PL_top_env;
1120 PL_top_env = next->cctx->top_env; 1408 PL_top_env = next->cctx->top_env;
1121 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1122 } 1410 }
1123 1411
1124 free_coro_mortal (aTHX); 1412 transfer_tail (aTHX);
1125 UNLOCK;
1126
1127 if (expect_false (prev->throw || next->throw))
1128 {
1129 struct coro *coro = SvSTATE (coro_current);
1130
1131 if (coro->throw)
1132 {
1133 SV *exception = coro->throw;
1134 coro->throw = 0;
1135 sv_setsv (ERRSV, exception);
1136 croak (0);
1137 }
1138 }
1139 } 1413 }
1140} 1414}
1141 1415
1142struct transfer_args
1143{
1144 struct coro *prev, *next;
1145};
1146
1147#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1148#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1149 1418
1150/** high level stuff ********************************************************/ 1419/** high level stuff ********************************************************/
1151 1420
1152static int 1421static int
1153coro_state_destroy (pTHX_ struct coro *coro) 1422coro_state_destroy (pTHX_ struct coro *coro)
1154{ 1423{
1155 if (coro->flags & CF_DESTROYED) 1424 if (coro->flags & CF_DESTROYED)
1156 return 0; 1425 return 0;
1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1157 1429
1158 coro->flags |= CF_DESTROYED; 1430 coro->flags |= CF_DESTROYED;
1159 1431
1160 if (coro->flags & CF_READY) 1432 if (coro->flags & CF_READY)
1161 { 1433 {
1162 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1163 /* alternative: look through all ready queues and remove the coro */ 1435 /* alternative: look through all ready queues and remove the coro */
1164 LOCK;
1165 --coro_nready; 1436 --coro_nready;
1166 UNLOCK;
1167 } 1437 }
1168 else 1438 else
1169 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1170 1440
1171 if (coro->mainstack && coro->mainstack != main_mainstack) 1441 if (coro->mainstack && coro->mainstack != main_mainstack)
1172 { 1442 {
1173 struct coro temp; 1443 struct coro temp;
1174 1444
1175 if (coro->flags & CF_RUNNING) 1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1176 croak ("FATAL: tried to destroy currently running coroutine");
1177 1446
1178 save_perl (aTHX_ &temp); 1447 save_perl (aTHX_ &temp);
1179 load_perl (aTHX_ coro); 1448 load_perl (aTHX_ coro);
1180 1449
1181 coro_destroy (aTHX_ coro); 1450 coro_destruct (aTHX_ coro);
1182 1451
1183 load_perl (aTHX_ &temp); 1452 load_perl (aTHX_ &temp);
1184 1453
1185 coro->slot = 0; 1454 coro->slot = 0;
1186 } 1455 }
1187 1456
1188 cctx_destroy (coro->cctx); 1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
1189 SvREFCNT_dec (coro->args); 1459 SvREFCNT_dec (coro->args);
1460 SvREFCNT_dec (CORO_THROW);
1190 1461
1191 if (coro->next) coro->next->prev = coro->prev; 1462 if (coro->next) coro->next->prev = coro->prev;
1192 if (coro->prev) coro->prev->next = coro->next; 1463 if (coro->prev) coro->prev->next = coro->next;
1193 if (coro == coro_first) coro_first = coro->next; 1464 if (coro == coro_first) coro_first = coro->next;
1194 1465
… …
1232# define MGf_DUP 0 1503# define MGf_DUP 0
1233#endif 1504#endif
1234}; 1505};
1235 1506
1236static void 1507static void
1237prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1238{ 1509{
1239 ta->prev = SvSTATE (prev_sv); 1510 ta->prev = SvSTATE (prev_sv);
1240 ta->next = SvSTATE (next_sv); 1511 ta->next = SvSTATE (next_sv);
1241 TRANSFER_CHECK (*ta); 1512 TRANSFER_CHECK (*ta);
1242} 1513}
1243 1514
1244static void 1515static void
1245api_transfer (SV *prev_sv, SV *next_sv) 1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1246{ 1517{
1247 dTHX;
1248 struct transfer_args ta; 1518 struct coro_transfer_args ta;
1249 1519
1250 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1251 TRANSFER (ta); 1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1252} 1545}
1253 1546
1254/** Coro ********************************************************************/ 1547/** Coro ********************************************************************/
1255 1548
1256static void 1549INLINE void
1257coro_enq (pTHX_ SV *coro_sv) 1550coro_enq (pTHX_ struct coro *coro)
1258{ 1551{
1259 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1260} 1553}
1261 1554
1262static SV * 1555INLINE SV *
1263coro_deq (pTHX_ int min_prio) 1556coro_deq (pTHX)
1264{ 1557{
1265 int prio = PRIO_MAX - PRIO_MIN; 1558 int prio;
1266 1559
1267 min_prio -= PRIO_MIN;
1268 if (min_prio < 0)
1269 min_prio = 0;
1270
1271 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1272 if (AvFILLp (coro_ready [prio]) >= 0) 1561 if (AvFILLp (coro_ready [prio]) >= 0)
1273 return av_shift (coro_ready [prio]); 1562 return av_shift (coro_ready [prio]);
1274 1563
1275 return 0; 1564 return 0;
1276} 1565}
1277 1566
1278static int 1567static int
1279api_ready (SV *coro_sv) 1568api_ready (pTHX_ SV *coro_sv)
1280{ 1569{
1281 dTHX;
1282 struct coro *coro; 1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
1283 1573
1284 if (SvROK (coro_sv)) 1574 if (SvROK (coro_sv))
1285 coro_sv = SvRV (coro_sv); 1575 coro_sv = SvRV (coro_sv);
1286 1576
1287 coro = SvSTATE (coro_sv); 1577 coro = SvSTATE (coro_sv);
… …
1289 if (coro->flags & CF_READY) 1579 if (coro->flags & CF_READY)
1290 return 0; 1580 return 0;
1291 1581
1292 coro->flags |= CF_READY; 1582 coro->flags |= CF_READY;
1293 1583
1294 LOCK; 1584 sv_hook = coro_nready ? 0 : coro_readyhook;
1295 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1586
1587 coro_enq (aTHX_ coro);
1296 ++coro_nready; 1588 ++coro_nready;
1297 UNLOCK; 1589
1590 if (sv_hook)
1591 {
1592 dSP;
1593
1594 ENTER;
1595 SAVETMPS;
1596
1597 PUSHMARK (SP);
1598 PUTBACK;
1599 call_sv (sv_hook, G_VOID | G_DISCARD);
1600
1601 FREETMPS;
1602 LEAVE;
1603 }
1604
1605 if (xs_hook)
1606 xs_hook ();
1298 1607
1299 return 1; 1608 return 1;
1300} 1609}
1301 1610
1302static int 1611static int
1303api_is_ready (SV *coro_sv) 1612api_is_ready (pTHX_ SV *coro_sv)
1304{ 1613{
1305 dTHX;
1306 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1307} 1615}
1308 1616
1617/* expects to own a reference to next->hv */
1618INLINE void
1619prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1620{
1621 SV *prev_sv = SvRV (coro_current);
1622
1623 ta->prev = SvSTATE_hv (prev_sv);
1624 ta->next = next;
1625
1626 TRANSFER_CHECK (*ta);
1627
1628 SvRV_set (coro_current, (SV *)next->hv);
1629
1630 free_coro_mortal (aTHX);
1631 coro_mortal = prev_sv;
1632}
1633
1309static void 1634static void
1310prepare_schedule (pTHX_ struct transfer_args *ta) 1635prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1311{ 1636{
1312 SV *prev_sv, *next_sv;
1313
1314 for (;;) 1637 for (;;)
1315 { 1638 {
1316 LOCK;
1317 next_sv = coro_deq (aTHX_ PRIO_MIN); 1639 SV *next_sv = coro_deq (aTHX);
1318 1640
1319 /* nothing to schedule: call the idle handler */
1320 if (expect_false (!next_sv)) 1641 if (expect_true (next_sv))
1321 { 1642 {
1643 struct coro *next = SvSTATE_hv (next_sv);
1644
1645 /* cannot transfer to destroyed coros, skip and look for next */
1646 if (expect_false (next->flags & CF_DESTROYED))
1647 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1648 else
1649 {
1650 next->flags &= ~CF_READY;
1651 --coro_nready;
1652
1653 return prepare_schedule_to (aTHX_ ta, next);
1654 }
1655 }
1656 else
1657 {
1658 /* nothing to schedule: call the idle handler */
1322 dSP; 1659 dSP;
1323 UNLOCK;
1324 1660
1325 ENTER; 1661 ENTER;
1326 SAVETMPS; 1662 SAVETMPS;
1327 1663
1328 PUSHMARK (SP); 1664 PUSHMARK (SP);
1329 PUTBACK; 1665 PUTBACK;
1330 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1666 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1331 1667
1332 FREETMPS; 1668 FREETMPS;
1333 LEAVE; 1669 LEAVE;
1334 continue;
1335 } 1670 }
1336
1337 ta->next = SvSTATE (next_sv);
1338
1339 /* cannot transfer to destroyed coros, skip and look for next */
1340 if (expect_false (ta->next->flags & CF_DESTROYED))
1341 {
1342 UNLOCK;
1343 SvREFCNT_dec (next_sv);
1344 /* coro_nready is already taken care of by destroy */
1345 continue;
1346 }
1347
1348 --coro_nready;
1349 UNLOCK;
1350 break;
1351 } 1671 }
1352
1353 /* free this only after the transfer */
1354 prev_sv = SvRV (coro_current);
1355 ta->prev = SvSTATE (prev_sv);
1356 TRANSFER_CHECK (*ta);
1357 assert (ta->next->flags & CF_READY);
1358 ta->next->flags &= ~CF_READY;
1359 SvRV_set (coro_current, next_sv);
1360
1361 LOCK;
1362 free_coro_mortal (aTHX);
1363 coro_mortal = prev_sv;
1364 UNLOCK;
1365} 1672}
1366 1673
1367static void 1674INLINE void
1368prepare_cede (pTHX_ struct transfer_args *ta) 1675prepare_cede (pTHX_ struct coro_transfer_args *ta)
1369{ 1676{
1370 api_ready (coro_current); 1677 api_ready (aTHX_ coro_current);
1371 prepare_schedule (aTHX_ ta); 1678 prepare_schedule (aTHX_ ta);
1372} 1679}
1373 1680
1681INLINE void
1682prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1683{
1684 SV *prev = SvRV (coro_current);
1685
1686 if (coro_nready)
1687 {
1688 prepare_schedule (aTHX_ ta);
1689 api_ready (aTHX_ prev);
1690 }
1691 else
1692 prepare_nop (aTHX_ ta);
1693}
1694
1695static void
1696api_schedule (pTHX)
1697{
1698 struct coro_transfer_args ta;
1699
1700 prepare_schedule (aTHX_ &ta);
1701 TRANSFER (ta, 1);
1702}
1703
1704static void
1705api_schedule_to (pTHX_ SV *coro_sv)
1706{
1707 struct coro_transfer_args ta;
1708 struct coro *next = SvSTATE (coro_sv);
1709
1710 SvREFCNT_inc_NN (coro_sv);
1711 prepare_schedule_to (aTHX_ &ta, next);
1712}
1713
1374static int 1714static int
1375prepare_cede_notself (pTHX_ struct transfer_args *ta) 1715api_cede (pTHX)
1376{ 1716{
1377 if (coro_nready) 1717 struct coro_transfer_args ta;
1378 { 1718
1379 SV *prev = SvRV (coro_current);
1380 prepare_schedule (aTHX_ ta); 1719 prepare_cede (aTHX_ &ta);
1381 api_ready (prev); 1720
1721 if (expect_true (ta.prev != ta.next))
1722 {
1723 TRANSFER (ta, 1);
1382 return 1; 1724 return 1;
1383 } 1725 }
1384 else 1726 else
1385 return 0; 1727 return 0;
1386} 1728}
1387 1729
1388static void
1389api_schedule (void)
1390{
1391 dTHX;
1392 struct transfer_args ta;
1393
1394 prepare_schedule (aTHX_ &ta);
1395 TRANSFER (ta);
1396}
1397
1398static int 1730static int
1399api_cede (void) 1731api_cede_notself (pTHX)
1400{ 1732{
1401 dTHX; 1733 if (coro_nready)
1734 {
1402 struct transfer_args ta; 1735 struct coro_transfer_args ta;
1403 1736
1404 prepare_cede (aTHX_ &ta); 1737 prepare_cede_notself (aTHX_ &ta);
1405
1406 if (expect_true (ta.prev != ta.next))
1407 {
1408 TRANSFER (ta); 1738 TRANSFER (ta, 1);
1409 return 1; 1739 return 1;
1410 } 1740 }
1411 else 1741 else
1412 return 0; 1742 return 0;
1413} 1743}
1414 1744
1415static int 1745static void
1416api_cede_notself (void)
1417{
1418 dTHX;
1419 struct transfer_args ta;
1420
1421 if (prepare_cede_notself (aTHX_ &ta))
1422 {
1423 TRANSFER (ta);
1424 return 1;
1425 }
1426 else
1427 return 0;
1428}
1429
1430static void
1431api_trace (SV *coro_sv, int flags) 1746api_trace (pTHX_ SV *coro_sv, int flags)
1432{ 1747{
1433 dTHX;
1434 struct coro *coro = SvSTATE (coro_sv); 1748 struct coro *coro = SvSTATE (coro_sv);
1435 1749
1436 if (flags & CC_TRACE) 1750 if (flags & CC_TRACE)
1437 { 1751 {
1438 if (!coro->cctx) 1752 if (!coro->cctx)
1439 coro->cctx = cctx_new (); 1753 coro->cctx = cctx_new_run ();
1440 else if (!(coro->cctx->flags & CC_TRACE)) 1754 else if (!(coro->cctx->flags & CC_TRACE))
1441 croak ("cannot enable tracing on coroutine with custom stack"); 1755 croak ("cannot enable tracing on coroutine with custom stack,");
1442 1756
1443 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1757 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1444 } 1758 }
1445 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1759 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1446 { 1760 {
… …
1451 else 1765 else
1452 coro->slot->runops = RUNOPS_DEFAULT; 1766 coro->slot->runops = RUNOPS_DEFAULT;
1453 } 1767 }
1454} 1768}
1455 1769
1770/*****************************************************************************/
1771/* async pool handler */
1772
1773static int
1774slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1775{
1776 HV *hv = (HV *)SvRV (coro_current);
1777 struct coro *coro = (struct coro *)frame->data;
1778
1779 if (!coro->invoke_cb)
1780 return 1; /* loop till we have invoke */
1781 else
1782 {
1783 hv_store (hv, "desc", sizeof ("desc") - 1,
1784 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1785
1786 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1787
1788 {
1789 dSP;
1790 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1791 PUTBACK;
1792 }
1793
1794 SvREFCNT_dec (GvAV (PL_defgv));
1795 GvAV (PL_defgv) = coro->invoke_av;
1796 coro->invoke_av = 0;
1797
1798 return 0;
1799 }
1800}
1801
1802static void
1803slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1804{
1805 HV *hv = (HV *)SvRV (coro_current);
1806 struct coro *coro = SvSTATE_hv ((SV *)hv);
1807
1808 if (expect_true (coro->saved_deffh))
1809 {
1810 /* subsequent iteration */
1811 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1812 coro->saved_deffh = 0;
1813
1814 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1815 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1816 {
1817 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1818 coro->invoke_av = newAV ();
1819
1820 frame->prepare = prepare_nop;
1821 }
1822 else
1823 {
1824 av_clear (GvAV (PL_defgv));
1825 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1826
1827 coro->prio = 0;
1828
1829 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1830 api_trace (aTHX_ coro_current, 0);
1831
1832 frame->prepare = prepare_schedule;
1833 av_push (av_async_pool, SvREFCNT_inc (hv));
1834 }
1835 }
1836 else
1837 {
1838 /* first iteration, simply fall through */
1839 frame->prepare = prepare_nop;
1840 }
1841
1842 frame->check = slf_check_pool_handler;
1843 frame->data = (void *)coro;
1844}
1845
1846/*****************************************************************************/
1847/* rouse callback */
1848
1849#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1850
1851static void
1852coro_rouse_callback (pTHX_ CV *cv)
1853{
1854 dXSARGS;
1855 SV *data = (SV *)GENSUB_ARG;
1856
1857 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1858 {
1859 /* first call, set args */
1860 AV *av = newAV ();
1861 SV *coro = SvRV (data);
1862
1863 SvRV_set (data, (SV *)av);
1864 api_ready (aTHX_ coro);
1865 SvREFCNT_dec (coro);
1866
1867 /* better take a full copy of the arguments */
1868 while (items--)
1869 av_store (av, items, newSVsv (ST (items)));
1870 }
1871
1872 XSRETURN_EMPTY;
1873}
1874
1875static int
1876slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1877{
1878 SV *data = (SV *)frame->data;
1879
1880 if (CORO_THROW)
1881 return 0;
1882
1883 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1884 return 1;
1885
1886 /* now push all results on the stack */
1887 {
1888 dSP;
1889 AV *av = (AV *)SvRV (data);
1890 int i;
1891
1892 EXTEND (SP, AvFILLp (av) + 1);
1893 for (i = 0; i <= AvFILLp (av); ++i)
1894 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1895
1896 /* we have stolen the elements, so ste length to zero and free */
1897 AvFILLp (av) = -1;
1898 av_undef (av);
1899
1900 PUTBACK;
1901 }
1902
1903 return 0;
1904}
1905
1906static void
1907slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1908{
1909 SV *cb;
1910
1911 if (items)
1912 cb = arg [0];
1913 else
1914 {
1915 struct coro *coro = SvSTATE_current;
1916
1917 if (!coro->rouse_cb)
1918 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1919
1920 cb = sv_2mortal (coro->rouse_cb);
1921 coro->rouse_cb = 0;
1922 }
1923
1924 if (!SvROK (cb)
1925 || SvTYPE (SvRV (cb)) != SVt_PVCV
1926 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1927 croak ("Coro::rouse_wait called with illegal callback argument,");
1928
1929 {
1930 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1931 SV *data = (SV *)GENSUB_ARG;
1932
1933 frame->data = (void *)data;
1934 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1935 frame->check = slf_check_rouse_wait;
1936 }
1937}
1938
1939static SV *
1940coro_new_rouse_cb (pTHX)
1941{
1942 HV *hv = (HV *)SvRV (coro_current);
1943 struct coro *coro = SvSTATE_hv (hv);
1944 SV *data = newRV_inc ((SV *)hv);
1945 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1946
1947 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1948 SvREFCNT_dec (data); /* magicext increases the refcount */
1949
1950 SvREFCNT_dec (coro->rouse_cb);
1951 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1952
1953 return cb;
1954}
1955
1956/*****************************************************************************/
1957/* schedule-like-function opcode (SLF) */
1958
1959static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1960static const CV *slf_cv;
1961static SV **slf_argv;
1962static int slf_argc, slf_arga; /* count, allocated */
1963static I32 slf_ax; /* top of stack, for restore */
1964
1965/* this restores the stack in the case we patched the entersub, to */
1966/* recreate the stack frame as perl will on following calls */
1967/* since entersub cleared the stack */
1968static OP *
1969pp_restore (pTHX)
1970{
1971 int i;
1972 SV **SP = PL_stack_base + slf_ax;
1973
1974 PUSHMARK (SP);
1975
1976 EXTEND (SP, slf_argc + 1);
1977
1978 for (i = 0; i < slf_argc; ++i)
1979 PUSHs (sv_2mortal (slf_argv [i]));
1980
1981 PUSHs ((SV *)CvGV (slf_cv));
1982
1983 RETURNOP (slf_restore.op_first);
1984}
1985
1986static void
1987slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1988{
1989 SV **arg = (SV **)slf_frame.data;
1990
1991 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1992}
1993
1994static void
1995slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1996{
1997 if (items != 2)
1998 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1999
2000 frame->prepare = slf_prepare_transfer;
2001 frame->check = slf_check_nop;
2002 frame->data = (void *)arg; /* let's hope it will stay valid */
2003}
2004
2005static void
2006slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2007{
2008 frame->prepare = prepare_schedule;
2009 frame->check = slf_check_nop;
2010}
2011
2012static void
2013slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2014{
2015 struct coro *next = (struct coro *)slf_frame.data;
2016
2017 SvREFCNT_inc_NN (next->hv);
2018 prepare_schedule_to (aTHX_ ta, next);
2019}
2020
2021static void
2022slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2023{
2024 if (!items)
2025 croak ("Coro::schedule_to expects a coroutine argument, caught");
2026
2027 frame->data = (void *)SvSTATE (arg [0]);
2028 frame->prepare = slf_prepare_schedule_to;
2029 frame->check = slf_check_nop;
2030}
2031
2032static void
2033slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2034{
2035 api_ready (aTHX_ SvRV (coro_current));
2036
2037 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2038}
2039
2040static void
2041slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2042{
2043 frame->prepare = prepare_cede;
2044 frame->check = slf_check_nop;
2045}
2046
2047static void
2048slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2049{
2050 frame->prepare = prepare_cede_notself;
2051 frame->check = slf_check_nop;
2052}
2053
2054/*
2055 * these not obviously related functions are all rolled into one
2056 * function to increase chances that they all will call transfer with the same
2057 * stack offset
2058 * SLF stands for "schedule-like-function".
2059 */
2060static OP *
2061pp_slf (pTHX)
2062{
2063 I32 checkmark; /* mark SP to see how many elements check has pushed */
2064
2065 /* set up the slf frame, unless it has already been set-up */
2066 /* the latter happens when a new coro has been started */
2067 /* or when a new cctx was attached to an existing coroutine */
2068 if (expect_true (!slf_frame.prepare))
2069 {
2070 /* first iteration */
2071 dSP;
2072 SV **arg = PL_stack_base + TOPMARK + 1;
2073 int items = SP - arg; /* args without function object */
2074 SV *gv = *sp;
2075
2076 /* do a quick consistency check on the "function" object, and if it isn't */
2077 /* for us, divert to the real entersub */
2078 if (SvTYPE (gv) != SVt_PVGV
2079 || !GvCV (gv)
2080 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2081 return PL_ppaddr[OP_ENTERSUB](aTHX);
2082
2083 if (!(PL_op->op_flags & OPf_STACKED))
2084 {
2085 /* ampersand-form of call, use @_ instead of stack */
2086 AV *av = GvAV (PL_defgv);
2087 arg = AvARRAY (av);
2088 items = AvFILLp (av) + 1;
2089 }
2090
2091 /* now call the init function, which needs to set up slf_frame */
2092 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2093 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2094
2095 /* pop args */
2096 SP = PL_stack_base + POPMARK;
2097
2098 PUTBACK;
2099 }
2100
2101 /* now that we have a slf_frame, interpret it! */
2102 /* we use a callback system not to make the code needlessly */
2103 /* complicated, but so we can run multiple perl coros from one cctx */
2104
2105 do
2106 {
2107 struct coro_transfer_args ta;
2108
2109 slf_frame.prepare (aTHX_ &ta);
2110 TRANSFER (ta, 0);
2111
2112 checkmark = PL_stack_sp - PL_stack_base;
2113 }
2114 while (slf_frame.check (aTHX_ &slf_frame));
2115
2116 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2117
2118 /* exception handling */
2119 if (expect_false (CORO_THROW))
2120 {
2121 SV *exception = sv_2mortal (CORO_THROW);
2122
2123 CORO_THROW = 0;
2124 sv_setsv (ERRSV, exception);
2125 croak (0);
2126 }
2127
2128 /* return value handling - mostly like entersub */
2129 /* make sure we put something on the stack in scalar context */
2130 if (GIMME_V == G_SCALAR)
2131 {
2132 dSP;
2133 SV **bot = PL_stack_base + checkmark;
2134
2135 if (sp == bot) /* too few, push undef */
2136 bot [1] = &PL_sv_undef;
2137 else if (sp != bot + 1) /* too many, take last one */
2138 bot [1] = *sp;
2139
2140 SP = bot + 1;
2141
2142 PUTBACK;
2143 }
2144
2145 return NORMAL;
2146}
2147
2148static void
2149api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2150{
2151 int i;
2152 SV **arg = PL_stack_base + ax;
2153 int items = PL_stack_sp - arg + 1;
2154
2155 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2156
2157 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2158 && PL_op->op_ppaddr != pp_slf)
2159 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2160
2161 CvFLAGS (cv) |= CVf_SLF;
2162 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2163 slf_cv = cv;
2164
2165 /* we patch the op, and then re-run the whole call */
2166 /* we have to put the same argument on the stack for this to work */
2167 /* and this will be done by pp_restore */
2168 slf_restore.op_next = (OP *)&slf_restore;
2169 slf_restore.op_type = OP_CUSTOM;
2170 slf_restore.op_ppaddr = pp_restore;
2171 slf_restore.op_first = PL_op;
2172
2173 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2174
2175 if (PL_op->op_flags & OPf_STACKED)
2176 {
2177 if (items > slf_arga)
2178 {
2179 slf_arga = items;
2180 free (slf_argv);
2181 slf_argv = malloc (slf_arga * sizeof (SV *));
2182 }
2183
2184 slf_argc = items;
2185
2186 for (i = 0; i < items; ++i)
2187 slf_argv [i] = SvREFCNT_inc (arg [i]);
2188 }
2189 else
2190 slf_argc = 0;
2191
2192 PL_op->op_ppaddr = pp_slf;
2193 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2194
2195 PL_op = (OP *)&slf_restore;
2196}
2197
2198/*****************************************************************************/
2199/* PerlIO::cede */
2200
2201typedef struct
2202{
2203 PerlIOBuf base;
2204 NV next, every;
2205} PerlIOCede;
2206
2207static IV
2208PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2209{
2210 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2211
2212 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2213 self->next = nvtime () + self->every;
2214
2215 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2216}
2217
2218static SV *
2219PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2220{
2221 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2222
2223 return newSVnv (self->every);
2224}
2225
2226static IV
2227PerlIOCede_flush (pTHX_ PerlIO *f)
2228{
2229 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2230 double now = nvtime ();
2231
2232 if (now >= self->next)
2233 {
2234 api_cede (aTHX);
2235 self->next = now + self->every;
2236 }
2237
2238 return PerlIOBuf_flush (aTHX_ f);
2239}
2240
2241static PerlIO_funcs PerlIO_cede =
2242{
2243 sizeof(PerlIO_funcs),
2244 "cede",
2245 sizeof(PerlIOCede),
2246 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2247 PerlIOCede_pushed,
2248 PerlIOBuf_popped,
2249 PerlIOBuf_open,
2250 PerlIOBase_binmode,
2251 PerlIOCede_getarg,
2252 PerlIOBase_fileno,
2253 PerlIOBuf_dup,
2254 PerlIOBuf_read,
2255 PerlIOBuf_unread,
2256 PerlIOBuf_write,
2257 PerlIOBuf_seek,
2258 PerlIOBuf_tell,
2259 PerlIOBuf_close,
2260 PerlIOCede_flush,
2261 PerlIOBuf_fill,
2262 PerlIOBase_eof,
2263 PerlIOBase_error,
2264 PerlIOBase_clearerr,
2265 PerlIOBase_setlinebuf,
2266 PerlIOBuf_get_base,
2267 PerlIOBuf_bufsiz,
2268 PerlIOBuf_get_ptr,
2269 PerlIOBuf_get_cnt,
2270 PerlIOBuf_set_ptrcnt,
2271};
2272
2273/*****************************************************************************/
2274/* Coro::Semaphore & Coro::Signal */
2275
2276static SV *
2277coro_waitarray_new (pTHX_ int count)
2278{
2279 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2280 AV *av = newAV ();
2281 SV **ary;
2282
2283 /* unfortunately, building manually saves memory */
2284 Newx (ary, 2, SV *);
2285 AvALLOC (av) = ary;
2286 /*AvARRAY (av) = ary;*/
2287 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2288 AvMAX (av) = 1;
2289 AvFILLp (av) = 0;
2290 ary [0] = newSViv (count);
2291
2292 return newRV_noinc ((SV *)av);
2293}
2294
2295/* semaphore */
2296
2297static void
2298coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2299{
2300 SV *count_sv = AvARRAY (av)[0];
2301 IV count = SvIVX (count_sv);
2302
2303 count += adjust;
2304 SvIVX (count_sv) = count;
2305
2306 /* now wake up as many waiters as are expected to lock */
2307 while (count > 0 && AvFILLp (av) > 0)
2308 {
2309 SV *cb;
2310
2311 /* swap first two elements so we can shift a waiter */
2312 AvARRAY (av)[0] = AvARRAY (av)[1];
2313 AvARRAY (av)[1] = count_sv;
2314 cb = av_shift (av);
2315
2316 if (SvOBJECT (cb))
2317 {
2318 api_ready (aTHX_ cb);
2319 --count;
2320 }
2321 else if (SvTYPE (cb) == SVt_PVCV)
2322 {
2323 dSP;
2324 PUSHMARK (SP);
2325 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2326 PUTBACK;
2327 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2328 }
2329
2330 SvREFCNT_dec (cb);
2331 }
2332}
2333
2334static void
2335coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2336{
2337 /* call $sem->adjust (0) to possibly wake up some other waiters */
2338 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2339}
2340
2341static int
2342slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2343{
2344 AV *av = (AV *)frame->data;
2345 SV *count_sv = AvARRAY (av)[0];
2346
2347 /* if we are about to throw, don't actually acquire the lock, just throw */
2348 if (CORO_THROW)
2349 return 0;
2350 else if (SvIVX (count_sv) > 0)
2351 {
2352 SvSTATE_current->on_destroy = 0;
2353
2354 if (acquire)
2355 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2356 else
2357 coro_semaphore_adjust (aTHX_ av, 0);
2358
2359 return 0;
2360 }
2361 else
2362 {
2363 int i;
2364 /* if we were woken up but can't down, we look through the whole */
2365 /* waiters list and only add us if we aren't in there already */
2366 /* this avoids some degenerate memory usage cases */
2367
2368 for (i = 1; i <= AvFILLp (av); ++i)
2369 if (AvARRAY (av)[i] == SvRV (coro_current))
2370 return 1;
2371
2372 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2373 return 1;
2374 }
2375}
2376
2377static int
2378slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2379{
2380 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2381}
2382
2383static int
2384slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2385{
2386 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2387}
2388
2389static void
2390slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2391{
2392 AV *av = (AV *)SvRV (arg [0]);
2393
2394 if (SvIVX (AvARRAY (av)[0]) > 0)
2395 {
2396 frame->data = (void *)av;
2397 frame->prepare = prepare_nop;
2398 }
2399 else
2400 {
2401 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2402
2403 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2404 frame->prepare = prepare_schedule;
2405
2406 /* to avoid race conditions when a woken-up coro gets terminated */
2407 /* we arrange for a temporary on_destroy that calls adjust (0) */
2408 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2409 }
2410}
2411
2412static void
2413slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2414{
2415 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2416 frame->check = slf_check_semaphore_down;
2417}
2418
2419static void
2420slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2421{
2422 if (items >= 2)
2423 {
2424 /* callback form */
2425 AV *av = (AV *)SvRV (arg [0]);
2426 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2427
2428 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2429
2430 if (SvIVX (AvARRAY (av)[0]) > 0)
2431 coro_semaphore_adjust (aTHX_ av, 0);
2432
2433 frame->prepare = prepare_nop;
2434 frame->check = slf_check_nop;
2435 }
2436 else
2437 {
2438 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2439 frame->check = slf_check_semaphore_wait;
2440 }
2441}
2442
2443/* signal */
2444
2445static void
2446coro_signal_wake (pTHX_ AV *av, int count)
2447{
2448 SvIVX (AvARRAY (av)[0]) = 0;
2449
2450 /* now signal count waiters */
2451 while (count > 0 && AvFILLp (av) > 0)
2452 {
2453 SV *cb;
2454
2455 /* swap first two elements so we can shift a waiter */
2456 cb = AvARRAY (av)[0];
2457 AvARRAY (av)[0] = AvARRAY (av)[1];
2458 AvARRAY (av)[1] = cb;
2459
2460 cb = av_shift (av);
2461
2462 api_ready (aTHX_ cb);
2463 sv_setiv (cb, 0); /* signal waiter */
2464 SvREFCNT_dec (cb);
2465
2466 --count;
2467 }
2468}
2469
2470static int
2471slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2472{
2473 /* if we are about to throw, also stop waiting */
2474 return SvROK ((SV *)frame->data) && !CORO_THROW;
2475}
2476
2477static void
2478slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2479{
2480 AV *av = (AV *)SvRV (arg [0]);
2481
2482 if (SvIVX (AvARRAY (av)[0]))
2483 {
2484 SvIVX (AvARRAY (av)[0]) = 0;
2485 frame->prepare = prepare_nop;
2486 frame->check = slf_check_nop;
2487 }
2488 else
2489 {
2490 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2491
2492 av_push (av, waiter);
2493
2494 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2495 frame->prepare = prepare_schedule;
2496 frame->check = slf_check_signal_wait;
2497 }
2498}
2499
2500/*****************************************************************************/
2501/* Coro::AIO */
2502
2503#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2504
2505/* helper storage struct */
2506struct io_state
2507{
2508 int errorno;
2509 I32 laststype; /* U16 in 5.10.0 */
2510 int laststatval;
2511 Stat_t statcache;
2512};
2513
2514static void
2515coro_aio_callback (pTHX_ CV *cv)
2516{
2517 dXSARGS;
2518 AV *state = (AV *)GENSUB_ARG;
2519 SV *coro = av_pop (state);
2520 SV *data_sv = newSV (sizeof (struct io_state));
2521
2522 av_extend (state, items - 1);
2523
2524 sv_upgrade (data_sv, SVt_PV);
2525 SvCUR_set (data_sv, sizeof (struct io_state));
2526 SvPOK_only (data_sv);
2527
2528 {
2529 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2530
2531 data->errorno = errno;
2532 data->laststype = PL_laststype;
2533 data->laststatval = PL_laststatval;
2534 data->statcache = PL_statcache;
2535 }
2536
2537 /* now build the result vector out of all the parameters and the data_sv */
2538 {
2539 int i;
2540
2541 for (i = 0; i < items; ++i)
2542 av_push (state, SvREFCNT_inc_NN (ST (i)));
2543 }
2544
2545 av_push (state, data_sv);
2546
2547 api_ready (aTHX_ coro);
2548 SvREFCNT_dec (coro);
2549 SvREFCNT_dec ((AV *)state);
2550}
2551
2552static int
2553slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2554{
2555 AV *state = (AV *)frame->data;
2556
2557 /* if we are about to throw, return early */
2558 /* this does not cancel the aio request, but at least */
2559 /* it quickly returns */
2560 if (CORO_THROW)
2561 return 0;
2562
2563 /* one element that is an RV? repeat! */
2564 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2565 return 1;
2566
2567 /* restore status */
2568 {
2569 SV *data_sv = av_pop (state);
2570 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2571
2572 errno = data->errorno;
2573 PL_laststype = data->laststype;
2574 PL_laststatval = data->laststatval;
2575 PL_statcache = data->statcache;
2576
2577 SvREFCNT_dec (data_sv);
2578 }
2579
2580 /* push result values */
2581 {
2582 dSP;
2583 int i;
2584
2585 EXTEND (SP, AvFILLp (state) + 1);
2586 for (i = 0; i <= AvFILLp (state); ++i)
2587 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2588
2589 PUTBACK;
2590 }
2591
2592 return 0;
2593}
2594
2595static void
2596slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2597{
2598 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2599 SV *coro_hv = SvRV (coro_current);
2600 struct coro *coro = SvSTATE_hv (coro_hv);
2601
2602 /* put our coroutine id on the state arg */
2603 av_push (state, SvREFCNT_inc_NN (coro_hv));
2604
2605 /* first see whether we have a non-zero priority and set it as AIO prio */
2606 if (coro->prio)
2607 {
2608 dSP;
2609
2610 static SV *prio_cv;
2611 static SV *prio_sv;
2612
2613 if (expect_false (!prio_cv))
2614 {
2615 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2616 prio_sv = newSViv (0);
2617 }
2618
2619 PUSHMARK (SP);
2620 sv_setiv (prio_sv, coro->prio);
2621 XPUSHs (prio_sv);
2622
2623 PUTBACK;
2624 call_sv (prio_cv, G_VOID | G_DISCARD);
2625 }
2626
2627 /* now call the original request */
2628 {
2629 dSP;
2630 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2631 int i;
2632
2633 PUSHMARK (SP);
2634
2635 /* first push all args to the stack */
2636 EXTEND (SP, items + 1);
2637
2638 for (i = 0; i < items; ++i)
2639 PUSHs (arg [i]);
2640
2641 /* now push the callback closure */
2642 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2643
2644 /* now call the AIO function - we assume our request is uncancelable */
2645 PUTBACK;
2646 call_sv ((SV *)req, G_VOID | G_DISCARD);
2647 }
2648
2649 /* now that the requets is going, we loop toll we have a result */
2650 frame->data = (void *)state;
2651 frame->prepare = prepare_schedule;
2652 frame->check = slf_check_aio_req;
2653}
2654
2655static void
2656coro_aio_req_xs (pTHX_ CV *cv)
2657{
2658 dXSARGS;
2659
2660 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2661
2662 XSRETURN_EMPTY;
2663}
2664
2665/*****************************************************************************/
2666
1456MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2667MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1457 2668
1458PROTOTYPES: DISABLE 2669PROTOTYPES: DISABLE
1459 2670
1460BOOT: 2671BOOT:
1461{ 2672{
1462#ifdef USE_ITHREADS 2673#ifdef USE_ITHREADS
1463 MUTEX_INIT (&coro_mutex); 2674# if CORO_PTHREAD
2675 coro_thx = PERL_GET_CONTEXT;
2676# endif
1464#endif 2677#endif
1465 BOOT_PAGESIZE; 2678 BOOT_PAGESIZE;
1466 2679
1467 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2680 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1468 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2681 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2682
2683 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2684 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2685 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2686
2687 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2688 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2689 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1469 2690
1470 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2691 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1471 2692
1472 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2693 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1473 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2694 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1478 main_top_env = PL_top_env; 2699 main_top_env = PL_top_env;
1479 2700
1480 while (main_top_env->je_prev) 2701 while (main_top_env->je_prev)
1481 main_top_env = main_top_env->je_prev; 2702 main_top_env = main_top_env->je_prev;
1482 2703
2704 {
2705 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2706
2707 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2708 hv_store_ent (PL_custom_op_names, slf,
2709 newSVpv ("coro_slf", 0), 0);
2710
2711 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2712 hv_store_ent (PL_custom_op_descs, slf,
2713 newSVpv ("coro schedule like function", 0), 0);
2714 }
2715
1483 coroapi.ver = CORO_API_VERSION; 2716 coroapi.ver = CORO_API_VERSION;
2717 coroapi.rev = CORO_API_REVISION;
2718
1484 coroapi.transfer = api_transfer; 2719 coroapi.transfer = api_transfer;
2720
2721 coroapi.sv_state = SvSTATE_;
2722 coroapi.execute_slf = api_execute_slf;
2723 coroapi.prepare_nop = prepare_nop;
2724 coroapi.prepare_schedule = prepare_schedule;
2725 coroapi.prepare_cede = prepare_cede;
2726 coroapi.prepare_cede_notself = prepare_cede_notself;
2727
2728 {
2729 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2730
2731 if (!svp) croak ("Time::HiRes is required");
2732 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2733
2734 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2735 }
1485 2736
1486 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2737 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1487} 2738}
1488 2739
1489SV * 2740SV *
1490new (char *klass, ...) 2741new (char *klass, ...)
2742 ALIAS:
2743 Coro::new = 1
1491 CODE: 2744 CODE:
1492{ 2745{
1493 struct coro *coro; 2746 struct coro *coro;
2747 MAGIC *mg;
1494 HV *hv; 2748 HV *hv;
2749 CV *cb;
1495 int i; 2750 int i;
2751
2752 if (items > 1)
2753 {
2754 cb = coro_sv_2cv (aTHX_ ST (1));
2755
2756 if (!ix)
2757 {
2758 if (CvISXSUB (cb))
2759 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2760
2761 if (!CvROOT (cb))
2762 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2763 }
2764 }
1496 2765
1497 Newz (0, coro, 1, struct coro); 2766 Newz (0, coro, 1, struct coro);
1498 coro->args = newAV (); 2767 coro->args = newAV ();
1499 coro->flags = CF_NEW; 2768 coro->flags = CF_NEW;
1500 2769
1501 if (coro_first) coro_first->prev = coro; 2770 if (coro_first) coro_first->prev = coro;
1502 coro->next = coro_first; 2771 coro->next = coro_first;
1503 coro_first = coro; 2772 coro_first = coro;
1504 2773
1505 coro->hv = hv = newHV (); 2774 coro->hv = hv = newHV ();
1506 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2775 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2776 mg->mg_flags |= MGf_DUP;
1507 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2777 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1508 2778
2779 if (items > 1)
2780 {
1509 av_extend (coro->args, items - 1); 2781 av_extend (coro->args, items - 1 + ix - 1);
2782
2783 if (ix)
2784 {
2785 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2786 cb = cv_coro_run;
2787 }
2788
2789 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2790
1510 for (i = 1; i < items; i++) 2791 for (i = 2; i < items; i++)
1511 av_push (coro->args, newSVsv (ST (i))); 2792 av_push (coro->args, newSVsv (ST (i)));
2793 }
1512} 2794}
1513 OUTPUT: 2795 OUTPUT:
1514 RETVAL 2796 RETVAL
1515 2797
1516# these not obviously related functions are all rolled into the same xs
1517# function to increase chances that they all will call transfer with the same
1518# stack offset
1519void 2798void
1520_set_stacklevel (...) 2799transfer (...)
1521 ALIAS: 2800 PROTOTYPE: $$
1522 Coro::State::transfer = 1 2801 CODE:
1523 Coro::schedule = 2 2802 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1524 Coro::cede = 3
1525 Coro::cede_notself = 4
1526 CODE:
1527{
1528 struct transfer_args ta;
1529
1530 switch (ix)
1531 {
1532 case 0:
1533 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1534 ta.next = 0;
1535 break;
1536
1537 case 1:
1538 if (items != 2)
1539 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1540
1541 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1542 break;
1543
1544 case 2:
1545 prepare_schedule (aTHX_ &ta);
1546 break;
1547
1548 case 3:
1549 prepare_cede (aTHX_ &ta);
1550 break;
1551
1552 case 4:
1553 if (!prepare_cede_notself (aTHX_ &ta))
1554 XSRETURN_EMPTY;
1555
1556 break;
1557 }
1558
1559 BARRIER;
1560 TRANSFER (ta);
1561
1562 if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1563 XSRETURN_YES;
1564}
1565 2803
1566bool 2804bool
1567_destroy (SV *coro_sv) 2805_destroy (SV *coro_sv)
1568 CODE: 2806 CODE:
1569 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2807 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1570 OUTPUT: 2808 OUTPUT:
1571 RETVAL 2809 RETVAL
1572 2810
1573void 2811void
1574_exit (code) 2812_exit (int code)
1575 int code
1576 PROTOTYPE: $ 2813 PROTOTYPE: $
1577 CODE: 2814 CODE:
1578 _exit (code); 2815 _exit (code);
1579 2816
1580int 2817int
1581cctx_stacksize (int new_stacksize = 0) 2818cctx_stacksize (int new_stacksize = 0)
2819 PROTOTYPE: ;$
1582 CODE: 2820 CODE:
1583 RETVAL = coro_stacksize; 2821 RETVAL = cctx_stacksize;
1584 if (new_stacksize) 2822 if (new_stacksize)
2823 {
1585 coro_stacksize = new_stacksize; 2824 cctx_stacksize = new_stacksize;
2825 ++cctx_gen;
2826 }
1586 OUTPUT: 2827 OUTPUT:
1587 RETVAL 2828 RETVAL
1588 2829
1589int 2830int
2831cctx_max_idle (int max_idle = 0)
2832 PROTOTYPE: ;$
2833 CODE:
2834 RETVAL = cctx_max_idle;
2835 if (max_idle > 1)
2836 cctx_max_idle = max_idle;
2837 OUTPUT:
2838 RETVAL
2839
2840int
1590cctx_count () 2841cctx_count ()
2842 PROTOTYPE:
1591 CODE: 2843 CODE:
1592 RETVAL = cctx_count; 2844 RETVAL = cctx_count;
1593 OUTPUT: 2845 OUTPUT:
1594 RETVAL 2846 RETVAL
1595 2847
1596int 2848int
1597cctx_idle () 2849cctx_idle ()
2850 PROTOTYPE:
1598 CODE: 2851 CODE:
1599 RETVAL = cctx_idle; 2852 RETVAL = cctx_idle;
1600 OUTPUT: 2853 OUTPUT:
1601 RETVAL 2854 RETVAL
1602 2855
1603void 2856void
1604list () 2857list ()
2858 PROTOTYPE:
1605 PPCODE: 2859 PPCODE:
1606{ 2860{
1607 struct coro *coro; 2861 struct coro *coro;
1608 for (coro = coro_first; coro; coro = coro->next) 2862 for (coro = coro_first; coro; coro = coro->next)
1609 if (coro->hv) 2863 if (coro->hv)
… …
1614call (Coro::State coro, SV *coderef) 2868call (Coro::State coro, SV *coderef)
1615 ALIAS: 2869 ALIAS:
1616 eval = 1 2870 eval = 1
1617 CODE: 2871 CODE:
1618{ 2872{
1619 if (coro->mainstack) 2873 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1620 { 2874 {
1621 struct coro temp; 2875 struct coro temp;
1622 2876
1623 if (!(coro->flags & CF_RUNNING)) 2877 if (!(coro->flags & CF_RUNNING))
1624 { 2878 {
2879 PUTBACK;
1625 save_perl (aTHX_ &temp); 2880 save_perl (aTHX_ &temp);
1626 load_perl (aTHX_ coro); 2881 load_perl (aTHX_ coro);
1627 } 2882 }
1628 2883
1629 { 2884 {
1630 dSP; 2885 dSP;
1631 ENTER; 2886 ENTER;
1632 SAVETMPS; 2887 SAVETMPS;
2888 PUTBACK;
2889 PUSHSTACK;
1633 PUSHMARK (SP); 2890 PUSHMARK (SP);
1634 PUTBACK;
1635 2891
1636 if (ix) 2892 if (ix)
1637 eval_sv (coderef, 0); 2893 eval_sv (coderef, 0);
1638 else 2894 else
1639 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 2895 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1640 2896
2897 POPSTACK;
1641 SPAGAIN; 2898 SPAGAIN;
1642 FREETMPS; 2899 FREETMPS;
1643 LEAVE; 2900 LEAVE;
1644 PUTBACK; 2901 PUTBACK;
1645 } 2902 }
1646 2903
1647 if (!(coro->flags & CF_RUNNING)) 2904 if (!(coro->flags & CF_RUNNING))
1648 { 2905 {
1649 save_perl (aTHX_ coro); 2906 save_perl (aTHX_ coro);
1650 load_perl (aTHX_ &temp); 2907 load_perl (aTHX_ &temp);
2908 SPAGAIN;
1651 } 2909 }
1652 } 2910 }
1653} 2911}
1654 2912
1655SV * 2913SV *
… …
1664 RETVAL = boolSV (coro->flags & ix); 2922 RETVAL = boolSV (coro->flags & ix);
1665 OUTPUT: 2923 OUTPUT:
1666 RETVAL 2924 RETVAL
1667 2925
1668void 2926void
2927throw (Coro::State self, SV *throw = &PL_sv_undef)
2928 PROTOTYPE: $;$
2929 CODE:
2930{
2931 struct coro *current = SvSTATE_current;
2932 SV **throwp = self == current ? &CORO_THROW : &self->except;
2933 SvREFCNT_dec (*throwp);
2934 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2935}
2936
2937void
1669api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2938api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2939 PROTOTYPE: $;$
2940 C_ARGS: aTHX_ coro, flags
1670 2941
1671SV * 2942SV *
1672has_stack (Coro::State coro) 2943has_cctx (Coro::State coro)
1673 PROTOTYPE: $ 2944 PROTOTYPE: $
1674 CODE: 2945 CODE:
1675 RETVAL = boolSV (!!coro->cctx); 2946 RETVAL = boolSV (!!coro->cctx);
1676 OUTPUT: 2947 OUTPUT:
1677 RETVAL 2948 RETVAL
… …
1682 CODE: 2953 CODE:
1683 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2954 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1684 OUTPUT: 2955 OUTPUT:
1685 RETVAL 2956 RETVAL
1686 2957
1687IV 2958UV
1688rss (Coro::State coro) 2959rss (Coro::State coro)
1689 PROTOTYPE: $ 2960 PROTOTYPE: $
1690 ALIAS: 2961 ALIAS:
1691 usecount = 1 2962 usecount = 1
1692 CODE: 2963 CODE:
… …
1696 case 1: RETVAL = coro->usecount; break; 2967 case 1: RETVAL = coro->usecount; break;
1697 } 2968 }
1698 OUTPUT: 2969 OUTPUT:
1699 RETVAL 2970 RETVAL
1700 2971
2972void
2973force_cctx ()
2974 PROTOTYPE:
2975 CODE:
2976 SvSTATE_current->cctx->idle_sp = 0;
2977
2978void
2979swap_defsv (Coro::State self)
2980 PROTOTYPE: $
2981 ALIAS:
2982 swap_defav = 1
2983 CODE:
2984 if (!self->slot)
2985 croak ("cannot swap state with coroutine that has no saved state,");
2986 else
2987 {
2988 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2989 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2990
2991 SV *tmp = *src; *src = *dst; *dst = tmp;
2992 }
2993
1701 2994
1702MODULE = Coro::State PACKAGE = Coro 2995MODULE = Coro::State PACKAGE = Coro
1703 2996
1704BOOT: 2997BOOT:
1705{ 2998{
1706 int i; 2999 int i;
1707 3000
1708 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1709 get_sv ("Coro::POOL_RSS" , TRUE); /* silence stupid 5.10 warning */
1710 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1711 get_sv ("Coro::POOL_SIZE" , TRUE); /* silence stupid 5.10 warning */
1712 av_async_pool = get_av ("Coro::async_pool", TRUE); 3001 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1713 get_av ("Coro::async_pool", TRUE); /* silence stupid 5.10 warning */ 3002 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3003 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3004 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3005 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3006 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1714 3007
1715 coro_current = get_sv ("Coro::current", FALSE); 3008 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1716 SvREADONLY_on (coro_current); 3009 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3010 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3011 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1717 3012
1718 coro_stash = gv_stashpv ("Coro", TRUE); 3013 coro_stash = gv_stashpv ("Coro", TRUE);
1719 3014
1720 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3015 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1721 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3016 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1726 3021
1727 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3022 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1728 coro_ready[i] = newAV (); 3023 coro_ready[i] = newAV ();
1729 3024
1730 { 3025 {
1731 SV *sv = perl_get_sv ("Coro::API", TRUE); 3026 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1732 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1733 3027
1734 coroapi.schedule = api_schedule; 3028 coroapi.schedule = api_schedule;
3029 coroapi.schedule_to = api_schedule_to;
1735 coroapi.cede = api_cede; 3030 coroapi.cede = api_cede;
1736 coroapi.cede_notself = api_cede_notself; 3031 coroapi.cede_notself = api_cede_notself;
1737 coroapi.ready = api_ready; 3032 coroapi.ready = api_ready;
1738 coroapi.is_ready = api_is_ready; 3033 coroapi.is_ready = api_is_ready;
1739 coroapi.nready = &coro_nready; 3034 coroapi.nready = coro_nready;
1740 coroapi.current = coro_current; 3035 coroapi.current = coro_current;
1741 3036
1742 GCoroAPI = &coroapi; 3037 /*GCoroAPI = &coroapi;*/
1743 sv_setiv (sv, (IV)&coroapi); 3038 sv_setiv (sv, (IV)&coroapi);
1744 SvREADONLY_on (sv); 3039 SvREADONLY_on (sv);
1745 } 3040 }
1746} 3041}
3042
3043void
3044schedule (...)
3045 CODE:
3046 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3047
3048void
3049schedule_to (...)
3050 CODE:
3051 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3052
3053void
3054cede_to (...)
3055 CODE:
3056 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3057
3058void
3059cede (...)
3060 CODE:
3061 CORO_EXECUTE_SLF_XS (slf_init_cede);
3062
3063void
3064cede_notself (...)
3065 CODE:
3066 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1747 3067
1748void 3068void
1749_set_current (SV *current) 3069_set_current (SV *current)
1750 PROTOTYPE: $ 3070 PROTOTYPE: $
1751 CODE: 3071 CODE:
1752 SvREFCNT_dec (SvRV (coro_current)); 3072 SvREFCNT_dec (SvRV (coro_current));
1753 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3073 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3074
3075void
3076_set_readyhook (SV *hook)
3077 PROTOTYPE: $
3078 CODE:
3079 SvREFCNT_dec (coro_readyhook);
3080 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1754 3081
1755int 3082int
1756prio (Coro::State coro, int newprio = 0) 3083prio (Coro::State coro, int newprio = 0)
3084 PROTOTYPE: $;$
1757 ALIAS: 3085 ALIAS:
1758 nice = 1 3086 nice = 1
1759 CODE: 3087 CODE:
1760{ 3088{
1761 RETVAL = coro->prio; 3089 RETVAL = coro->prio;
… …
1776 3104
1777SV * 3105SV *
1778ready (SV *self) 3106ready (SV *self)
1779 PROTOTYPE: $ 3107 PROTOTYPE: $
1780 CODE: 3108 CODE:
1781 RETVAL = boolSV (api_ready (self)); 3109 RETVAL = boolSV (api_ready (aTHX_ self));
1782 OUTPUT: 3110 OUTPUT:
1783 RETVAL 3111 RETVAL
1784 3112
1785int 3113int
1786nready (...) 3114nready (...)
… …
1789 RETVAL = coro_nready; 3117 RETVAL = coro_nready;
1790 OUTPUT: 3118 OUTPUT:
1791 RETVAL 3119 RETVAL
1792 3120
1793void 3121void
1794throw (Coro::State self, SV *throw = &PL_sv_undef) 3122_pool_handler (...)
1795 PROTOTYPE: $;$ 3123 CODE:
1796 CODE: 3124 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1797 SvREFCNT_dec (self->throw);
1798 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1799 3125
1800# for async_pool speedup
1801void 3126void
1802_pool_1 (SV *cb) 3127async_pool (SV *cv, ...)
3128 PROTOTYPE: &@
3129 PPCODE:
3130{
3131 HV *hv = (HV *)av_pop (av_async_pool);
3132 AV *av = newAV ();
3133 SV *cb = ST (0);
3134 int i;
3135
3136 av_extend (av, items - 2);
3137 for (i = 1; i < items; ++i)
3138 av_push (av, SvREFCNT_inc_NN (ST (i)));
3139
3140 if ((SV *)hv == &PL_sv_undef)
3141 {
3142 PUSHMARK (SP);
3143 EXTEND (SP, 2);
3144 PUSHs (sv_Coro);
3145 PUSHs ((SV *)cv_pool_handler);
3146 PUTBACK;
3147 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3148 SPAGAIN;
3149
3150 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3151 }
3152
3153 {
3154 struct coro *coro = SvSTATE_hv (hv);
3155
3156 assert (!coro->invoke_cb);
3157 assert (!coro->invoke_av);
3158 coro->invoke_cb = SvREFCNT_inc (cb);
3159 coro->invoke_av = av;
3160 }
3161
3162 api_ready (aTHX_ (SV *)hv);
3163
3164 if (GIMME_V != G_VOID)
3165 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3166 else
3167 SvREFCNT_dec (hv);
3168}
3169
3170SV *
3171rouse_cb ()
3172 PROTOTYPE:
1803 CODE: 3173 CODE:
1804{ 3174 RETVAL = coro_new_rouse_cb (aTHX);
1805 struct coro *coro = SvSTATE (coro_current);
1806 HV *hv = (HV *)SvRV (coro_current);
1807 AV *defav = GvAV (PL_defgv);
1808 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1809 AV *invoke_av;
1810 int i, len;
1811
1812 if (!invoke)
1813 croak ("\3async_pool terminate\2\n");
1814
1815 SvREFCNT_dec (coro->saved_deffh);
1816 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1817
1818 hv_store (hv, "desc", sizeof ("desc") - 1,
1819 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1820
1821 invoke_av = (AV *)SvRV (invoke);
1822 len = av_len (invoke_av);
1823
1824 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1825
1826 if (len > 0)
1827 {
1828 av_fill (defav, len - 1);
1829 for (i = 0; i < len; ++i)
1830 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1831 }
1832
1833 SvREFCNT_dec (invoke);
1834}
1835
1836void
1837_pool_2 (SV *cb)
1838 CODE:
1839{
1840 struct coro *coro = SvSTATE (coro_current);
1841
1842 sv_setsv (cb, &PL_sv_undef);
1843
1844 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1845 coro->saved_deffh = 0;
1846
1847 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1848 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1849 croak ("\3async_pool terminate\2\n");
1850
1851 av_clear (GvAV (PL_defgv));
1852 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1853 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1854
1855 coro->prio = 0;
1856
1857 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1858 api_trace (coro_current, 0);
1859
1860 av_push (av_async_pool, newSVsv (coro_current));
1861}
1862
1863
1864MODULE = Coro::State PACKAGE = Coro::AIO
1865
1866SV *
1867_get_state ()
1868 CODE:
1869{
1870 struct io_state *data;
1871
1872 RETVAL = newSV (sizeof (struct io_state));
1873 data = (struct io_state *)SvPVX (RETVAL);
1874 SvCUR_set (RETVAL, sizeof (struct io_state));
1875 SvPOK_only (RETVAL);
1876
1877 data->errorno = errno;
1878 data->laststype = PL_laststype;
1879 data->laststatval = PL_laststatval;
1880 data->statcache = PL_statcache;
1881}
1882 OUTPUT: 3175 OUTPUT:
1883 RETVAL 3176 RETVAL
1884 3177
1885void 3178void
1886_set_state (char *data_) 3179rouse_wait (...)
1887 PROTOTYPE: $ 3180 PROTOTYPE: ;$
3181 PPCODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3183
3184
3185MODULE = Coro::State PACKAGE = PerlIO::cede
3186
3187BOOT:
3188 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3189
3190
3191MODULE = Coro::State PACKAGE = Coro::Semaphore
3192
3193SV *
3194new (SV *klass, SV *count = 0)
1888 CODE: 3195 CODE:
1889{ 3196 RETVAL = sv_bless (
1890 struct io_state *data = (void *)data_; 3197 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3198 GvSTASH (CvGV (cv))
3199 );
3200 OUTPUT:
3201 RETVAL
1891 3202
1892 errno = data->errorno; 3203# helper for Coro::Channel
1893 PL_laststype = data->laststype; 3204SV *
1894 PL_laststatval = data->laststatval; 3205_alloc (int count)
1895 PL_statcache = data->statcache; 3206 CODE:
1896} 3207 RETVAL = coro_waitarray_new (aTHX_ count);
3208 OUTPUT:
3209 RETVAL
1897 3210
3211SV *
3212count (SV *self)
3213 CODE:
3214 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3215 OUTPUT:
3216 RETVAL
3217
3218void
3219up (SV *self, int adjust = 1)
3220 ALIAS:
3221 adjust = 1
3222 CODE:
3223 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3224
3225void
3226down (...)
3227 CODE:
3228 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3229
3230void
3231wait (...)
3232 CODE:
3233 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3234
3235void
3236try (SV *self)
3237 PPCODE:
3238{
3239 AV *av = (AV *)SvRV (self);
3240 SV *count_sv = AvARRAY (av)[0];
3241 IV count = SvIVX (count_sv);
3242
3243 if (count > 0)
3244 {
3245 --count;
3246 SvIVX (count_sv) = count;
3247 XSRETURN_YES;
3248 }
3249 else
3250 XSRETURN_NO;
3251}
3252
3253void
3254waiters (SV *self)
3255 PPCODE:
3256{
3257 AV *av = (AV *)SvRV (self);
3258 int wcount = AvFILLp (av) + 1 - 1;
3259
3260 if (GIMME_V == G_SCALAR)
3261 XPUSHs (sv_2mortal (newSViv (wcount)));
3262 else
3263 {
3264 int i;
3265 EXTEND (SP, wcount);
3266 for (i = 1; i <= wcount; ++i)
3267 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3268 }
3269}
3270
3271MODULE = Coro::State PACKAGE = Coro::Signal
3272
3273SV *
3274new (SV *klass)
3275 CODE:
3276 RETVAL = sv_bless (
3277 coro_waitarray_new (aTHX_ 0),
3278 GvSTASH (CvGV (cv))
3279 );
3280 OUTPUT:
3281 RETVAL
3282
3283void
3284wait (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3287
3288void
3289broadcast (SV *self)
3290 CODE:
3291{
3292 AV *av = (AV *)SvRV (self);
3293 coro_signal_wake (aTHX_ av, AvFILLp (av));
3294}
3295
3296void
3297send (SV *self)
3298 CODE:
3299{
3300 AV *av = (AV *)SvRV (self);
3301
3302 if (AvFILLp (av))
3303 coro_signal_wake (aTHX_ av, 1);
3304 else
3305 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3306}
3307
3308IV
3309awaited (SV *self)
3310 CODE:
3311 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3312 OUTPUT:
3313 RETVAL
3314
3315
3316MODULE = Coro::State PACKAGE = Coro::AnyEvent
3317
3318BOOT:
3319 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3320
3321void
3322_schedule (...)
3323 CODE:
3324{
3325 static int incede;
3326
3327 api_cede_notself (aTHX);
3328
3329 ++incede;
3330 while (coro_nready >= incede && api_cede (aTHX))
3331 ;
3332
3333 sv_setsv (sv_activity, &PL_sv_undef);
3334 if (coro_nready >= incede)
3335 {
3336 PUSHMARK (SP);
3337 PUTBACK;
3338 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3339 }
3340
3341 --incede;
3342}
3343
3344
3345MODULE = Coro::State PACKAGE = Coro::AIO
3346
3347void
3348_register (char *target, char *proto, SV *req)
3349 CODE:
3350{
3351 CV *req_cv = coro_sv_2cv (aTHX_ req);
3352 /* newXSproto doesn't return the CV on 5.8 */
3353 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3354 sv_setpv ((SV *)slf_cv, proto);
3355 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3356}
3357

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