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Comparing Coro/Coro/State.xs (file contents):
Revision 1.228 by root, Sun Apr 6 17:51:15 2008 UTC vs.
Revision 1.356 by root, Sat Jun 27 14:06:59 2009 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49 55
50#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
55 61
56#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr 63# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
59# endif 65# endif
… …
72# ifndef IS_PADCONST 78# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
74# endif 80# endif
75#endif 81#endif
76 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
77/* 5.8.8 */ 93/* 5.8.8 */
78#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
79# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
80#endif 96#endif
81#ifndef newSV 97#ifndef newSV
82# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
83#endif 99#endif
84 100#ifndef CvISXSUB_on
85/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
86#ifndef CxHASARGS 102#endif
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs 103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
88#endif 108#endif
89 109
90/* 5.8.7 */ 110/* 5.8.7 */
91#ifndef SvRV_set 111#ifndef SvRV_set
92# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
… …
105# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
106#endif 126#endif
107 127
108/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
109 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
110#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
111#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
112 137
113#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
114 139
115#if __GNUC__ >= 3 140#if __GNUC__ >= 3
116# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
117# define BARRIER __asm__ __volatile__ ("" : : : "memory")
118# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
119#else 144#else
120# define attribute(x) 145# define attribute(x)
121# define BARRIER
122# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
123#endif 148#endif
124 149
125#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
126#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
127 152
128#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
129 154
130#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
131 157
132#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
133static perl_mutex coro_mutex; 159# if CORO_PTHREAD
134# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
135# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
136#else
137# define LOCK (void)0
138# define UNLOCK (void)0
139#endif 161# endif
162#endif
140 163
141/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
142struct io_state
143{
144 int errorno;
145 I32 laststype;
146 int laststatval;
147 Stat_t statcache;
148};
149 165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
150static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
151static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
152static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
153static JMPENV *main_top_env; 174static JMPENV *main_top_env;
154static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
155static volatile SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
156 181
157static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
158static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
159static SV *rv_diehook; 184static SV *rv_diehook;
160static SV *rv_warnhook; 185static SV *rv_warnhook;
161static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
162 187
163/* async_pool helper stuff */ 188/* async_pool helper stuff */
164static SV *sv_pool_rss; 189static SV *sv_pool_rss;
165static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
166static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
167 199
168static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
169static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
170 202
171enum { 203enum {
… …
176 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
177 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
178}; 210};
179 211
180/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
181typedef struct coro_cctx { 213typedef struct coro_cctx
214{
182 struct coro_cctx *next; 215 struct coro_cctx *next;
183 216
184 /* the stack */ 217 /* the stack */
185 void *sptr; 218 void *sptr;
186 size_t ssize; 219 size_t ssize;
… …
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
191 JMPENV *top_env; 224 JMPENV *top_env;
192 coro_context cctx; 225 coro_context cctx;
193 226
227 U32 gen;
194#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
195 int valgrind_id; 229 int valgrind_id;
196#endif 230#endif
197 unsigned char flags; 231 unsigned char flags;
198} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
199 237
200enum { 238enum {
201 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
202 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
203 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
204 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
205}; 244};
206 245
207/* the structure where most of the perl state is stored, overlaid on the cxstack */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
208typedef struct { 247typedef struct
248{
209 SV *defsv; 249 SV *defsv;
210 AV *defav; 250 AV *defav;
211 SV *errsv; 251 SV *errsv;
212 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
213#define VAR(name,type) type name; 254#define VAR(name,type) type name;
214# include "state.h" 255# include "state.h"
215#undef VAR 256#undef VAR
216} perl_slots; 257} perl_slots;
217 258
218#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
219 260
220/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
221struct coro { 262struct coro {
222 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
223 coro_cctx *cctx; 264 coro_cctx *cctx;
224 265
225 /* process data */ 266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
226 AV *mainstack; 271 AV *mainstack;
227 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
228 273
274 CV *startcv; /* the CV to execute */
229 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
230 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
231 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
232 HV *hv; /* the perl hash associated with this coro, if any */ 278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
233 280
234 /* statistics */ 281 /* statistics */
235 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
236 283
237 /* coro process data */ 284 /* coro process data */
238 int prio; 285 int prio;
239 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
240 288
241 /* async_pool */ 289 /* async_pool */
242 SV *saved_deffh; 290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
243 297
244 /* linked list */ 298 /* linked list */
245 struct coro *next, *prev; 299 struct coro *next, *prev;
246}; 300};
247 301
248typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
249typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
304
305/* the following variables are effectively part of the perl context */
306/* and get copied between struct coro and these variables */
307/* the mainr easonw e don't support windows process emulation */
308static struct CoroSLF slf_frame; /* the current slf frame */
250 309
251/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
252 311
253#define PRIO_MAX 3 312#define PRIO_MAX 3
254#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
257#define PRIO_IDLE -3 316#define PRIO_IDLE -3
258#define PRIO_MIN -4 317#define PRIO_MIN -4
259 318
260/* for Coro.pm */ 319/* for Coro.pm */
261static SV *coro_current; 320static SV *coro_current;
262static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
263static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
264static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
265 326
266/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
267 328
268static SV * 329static SV *
269coro_get_sv (pTHX_ const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
… …
293 get_hv (name, create); 354 get_hv (name, create);
294#endif 355#endif
295 return get_hv (name, create); 356 return get_hv (name, create);
296} 357}
297 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
298static AV * 425static AV *
299coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
300{ 427{
301 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
302 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
303 430
304 newpadlist = newAV (); 431 newpadlist = newAV ();
… …
309 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
310#endif 437#endif
311 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
312 --AvFILLp (padlist); 439 --AvFILLp (padlist);
313 440
314 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
315 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
316 443
317 return newpadlist; 444 return newpadlist;
318} 445}
319 446
320static void 447static void
321free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
322{ 449{
323 /* may be during global destruction */ 450 /* may be during global destruction */
324 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
325 { 452 {
326 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
327 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
328 { 456 {
329 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
330 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
331 { 459 I32 j = AvFILLp (av);
332 SV *sv; 460
333 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
334 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
335
336 SvREFCNT_dec (*svp);
337 }
338 } 466 }
339 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
340 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
341 } 472 }
342} 473}
343 474
344static int 475static int
… …
349 480
350 /* casting is fun. */ 481 /* casting is fun. */
351 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
352 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
353 484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
354 return 0; 487 return 0;
355} 488}
356
357#define CORO_MAGIC_type_cv PERL_MAGIC_ext
358#define CORO_MAGIC_type_state PERL_MAGIC_ext
359 489
360static MGVTBL coro_cv_vtbl = { 490static MGVTBL coro_cv_vtbl = {
361 0, 0, 0, 0, 491 0, 0, 0, 0,
362 coro_cv_free 492 coro_cv_free
363}; 493};
364
365#define CORO_MAGIC(sv,type) \
366 SvMAGIC (sv) \
367 ? SvMAGIC (sv)->mg_type == type \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type) \
370 : 0
371
372#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
373#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
374
375static struct coro *
376SvSTATE_ (pTHX_ SV *coro)
377{
378 HV *stash;
379 MAGIC *mg;
380
381 if (SvROK (coro))
382 coro = SvRV (coro);
383
384 if (expect_false (SvTYPE (coro) != SVt_PVHV))
385 croak ("Coro::State object required");
386
387 stash = SvSTASH (coro);
388 if (expect_false (stash != coro_stash && stash != coro_state_stash))
389 {
390 /* very slow, but rare, check */
391 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
392 croak ("Coro::State object required");
393 }
394
395 mg = CORO_MAGIC_state (coro);
396 return (struct coro *)mg->mg_ptr;
397}
398
399#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
400 494
401/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
402static void 496static void
403get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
404{ 498{
… …
408 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
409 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
410 else 504 else
411 { 505 {
412#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
413 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
414 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
415 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
416 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
417 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
418#else 513#else
419 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
420#endif 515#endif
421 } 516 }
422} 517}
423 518
424static void 519static void
… …
431 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0); 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
432 527
433 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
434 529
435 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
436 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
437 532
438 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
439} 534}
440 535
441/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
442 540
443static void 541static void
444load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
445{ 543{
446 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
447 c->slot = 0; 545 c->slot = 0;
448 546
449 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
450 548
451 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
452 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
453 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
454 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
455 554
456 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
457 # include "state.h" 556 # include "state.h"
458 #undef VAR 557 #undef VAR
459 558
… …
470 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
471 } 570 }
472 571
473 PUTBACK; 572 PUTBACK;
474 } 573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
475} 585}
476 586
477static void 587static void
478save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
479{ 589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
480 { 601 {
481 dSP; 602 dSP;
482 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
483 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
484 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
494 { 615 {
495 while (expect_true (cxix >= 0)) 616 while (expect_true (cxix >= 0))
496 { 617 {
497 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
498 619
499 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)) 620 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
500 { 621 {
501 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
502 623
503 if (expect_true (CvDEPTH (cv))) 624 if (expect_true (CvDEPTH (cv)))
504 { 625 {
505 EXTEND (SP, 3); 626 EXTEND (SP, 3);
506 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
507 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
508 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
509 630
510 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
511 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
512 } 633 }
… …
539 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
540 661
541 { 662 {
542 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
543 664
544 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
545 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
546 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
547 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
548 670
549 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
550 # include "state.h" 672 # include "state.h"
551 #undef VAR 673 #undef VAR
552 } 674 }
553} 675}
554 676
555/* 677/*
556 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
557 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
558 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
559 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
560 */ 682 */
561#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
562# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
563#else 685#else
564static void 686static void
565coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
566{ 688{
567 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
604 726
605/* 727/*
606 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
607 */ 729 */
608static void 730static void
609coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
610{ 732{
611 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
612 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
613 735
614 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
630#if !PERL_VERSION_ATLEAST (5,10,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
631 Safefree (PL_retstack); 753 Safefree (PL_retstack);
632#endif 754#endif
633} 755}
634 756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
635static size_t 766static size_t
636coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
637{ 768{
638 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
639 770
640 if (coro->mainstack) 771 if (coro->mainstack)
641 { 772 {
642 perl_slots tmp_slot;
643 perl_slots *slot;
644
645 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
646 { 774 {
647 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
648 776 CORO_RSS;
649 #define VAR(name,type) slot->name = PL_ ## name;
650 # include "state.h"
651 #undef VAR 777 #undef SYM
652 } 778 }
653 else 779 else
654 slot = coro->slot; 780 {
655 781 #define SYM(sym) coro->slot->sym
656 rss += sizeof (slot->curstackinfo); 782 CORO_RSS;
657 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 783 #undef SYM
658 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 784 }
659 rss += slot->tmps_max * sizeof (SV *);
660 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
661 rss += slot->scopestack_max * sizeof (I32);
662 rss += slot->savestack_max * sizeof (ANY);
663
664#if !PERL_VERSION_ATLEAST (5,10,0)
665 rss += slot->retstack_max * sizeof (OP *);
666#endif
667 } 785 }
668 786
669 return rss; 787 return rss;
670} 788}
671 789
672/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
673 791
674static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
675static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg); 793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
676 802
677/* 803/*
678 * This overrides the default magic get method of %SIG elements. 804 * This overrides the default magic get method of %SIG elements.
679 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
680 * and instead of tryign to save and restore the hash elements, we just provide 806 * and instead of trying to save and restore the hash elements, we just provide
681 * readback here. 807 * readback here.
682 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
683 * not expecting this to actually change the hook. This is a potential problem
684 * when a schedule happens then, but we ignore this.
685 */ 808 */
686static int 809static int
687coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
688{ 811{
689 const char *s = MgPV_nolen_const (mg); 812 const char *s = MgPV_nolen_const (mg);
690 813
691 if (*s == '_') 814 if (*s == '_')
692 { 815 {
693 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 816 SV **svp = 0;
694 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
695 } 826 }
696 827
697 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
698} 829}
699 830
700static int 831static int
701coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
702{ 833{
703 const char *s = MgPV_nolen_const (mg); 834 const char *s = MgPV_nolen_const (mg);
704 835
705 if (*s == '_') 836 if (*s == '_')
706 { 837 {
… …
710 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
711 842
712 if (svp) 843 if (svp)
713 { 844 {
714 SV *old = *svp; 845 SV *old = *svp;
715 *svp = newSVsv (sv); 846 *svp = 0;
716 SvREFCNT_dec (old); 847 SvREFCNT_dec (old);
717 return; 848 return 0;
718 } 849 }
719 } 850 }
720 851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
721 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
722} 877}
723 878
724static void 879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
725coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
726{ 902{
727 /* 903 /*
728 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
729 */ 905 */
… …
731 907
732 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
733 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
734 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
735 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
736 PL_curpm = 0; 915 PL_curpm = 0;
737 PL_curpad = 0; 916 PL_curpad = 0;
738 PL_localizing = 0; 917 PL_localizing = 0;
739 PL_dirty = 0; 918 PL_dirty = 0;
740 PL_restartop = 0; 919 PL_restartop = 0;
741#if !PERL_VERSION_ATLEAST (5,10,0) 920#if PERL_VERSION_ATLEAST (5,10,0)
742 PL_parser = 0; 921 PL_parser = 0;
743#endif 922#endif
923 PL_hints = 0;
744 924
745 /* recreate the die/warn hooks */ 925 /* recreate the die/warn hooks */
746 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook ); 926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
747 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook); 927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
748 928
749 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
750 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
751 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
752 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
753 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
754 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
755 936
756 { 937 {
757 dSP; 938 dSP;
758 LOGOP myop; 939 UNOP myop;
759 940
760 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
761 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
762 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
763 945
764 PUSHMARK (SP); 946 PUSHMARK (SP);
765 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
766 PUTBACK; 948 PUTBACK;
767 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
768 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
769 SPAGAIN;
770 } 951 }
771 952
772 /* this newly created coroutine might be run on an existing cctx which most 953 /* this newly created coroutine might be run on an existing cctx which most
773 * likely was suspended in set_stacklevel, called from entersub. 954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
774 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
775 * so we ENTER here for symmetry
776 */ 955 */
777 ENTER; 956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
778} 957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
779 958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
780static void 971static void
781coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
782{ 973{
783 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
784 { 975 {
785 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
786 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
794 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
795 986
796 /* unwind main stack */ 987 /* unwind main stack */
797 dounwind (-1); 988 dounwind (-1);
798 } 989 }
990}
799 991
800 SvREFCNT_dec (GvSV (PL_defgv)); 992static void
801 SvREFCNT_dec (GvAV (PL_defgv)); 993coro_destruct_perl (pTHX_ struct coro *coro)
802 SvREFCNT_dec (GvSV (PL_errgv)); 994{
803 SvREFCNT_dec (PL_defoutgv); 995 SV *svf [9];
804 SvREFCNT_dec (PL_rs);
805 SvREFCNT_dec (GvSV (irsgv));
806 996
807 SvREFCNT_dec (PL_diehook);
808 SvREFCNT_dec (PL_warnhook);
809 997 {
998 struct coro *current = SvSTATE_current;
999
1000 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1001
1002 save_perl (aTHX_ current);
1003 load_perl (aTHX_ coro);
1004
1005 coro_unwind_stacks (aTHX);
1006 coro_destruct_stacks (aTHX);
1007
1008 // now save some sv's to be free'd later
1009 svf [0] = GvSV (PL_defgv);
1010 svf [1] = (SV *)GvAV (PL_defgv);
1011 svf [2] = GvSV (PL_errgv);
1012 svf [3] = (SV *)PL_defoutgv;
1013 svf [4] = PL_rs;
1014 svf [5] = GvSV (irsgv);
1015 svf [6] = (SV *)GvHV (PL_hintgv);
1016 svf [7] = PL_diehook;
1017 svf [8] = PL_warnhook;
1018 assert (9 == sizeof (svf) / sizeof (*svf));
1019
1020 load_perl (aTHX_ current);
1021 }
1022
1023 {
1024 int i;
1025
1026 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1027 SvREFCNT_dec (svf [i]);
1028
810 SvREFCNT_dec (coro->saved_deffh); 1029 SvREFCNT_dec (coro->saved_deffh);
811 SvREFCNT_dec (coro->throw); 1030 SvREFCNT_dec (coro->rouse_cb);
812 1031 SvREFCNT_dec (coro->invoke_cb);
813 coro_destroy_stacks (aTHX); 1032 SvREFCNT_dec (coro->invoke_av);
1033 }
814} 1034}
815 1035
816static void 1036INLINE void
817free_coro_mortal (pTHX) 1037free_coro_mortal (pTHX)
818{ 1038{
819 if (expect_true (coro_mortal)) 1039 if (expect_true (coro_mortal))
820 { 1040 {
821 SvREFCNT_dec (coro_mortal); 1041 SvREFCNT_dec (coro_mortal);
… …
826static int 1046static int
827runops_trace (pTHX) 1047runops_trace (pTHX)
828{ 1048{
829 COP *oldcop = 0; 1049 COP *oldcop = 0;
830 int oldcxix = -2; 1050 int oldcxix = -2;
831 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
832 coro_cctx *cctx = coro->cctx;
833 1051
834 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
835 { 1053 {
836 PERL_ASYNC_CHECK (); 1054 PERL_ASYNC_CHECK ();
837 1055
838 if (cctx->flags & CC_TRACE_ALL) 1056 if (cctx_current->flags & CC_TRACE_ALL)
839 { 1057 {
840 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1058 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
841 { 1059 {
842 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
843 SV **bot, **top; 1061 SV **bot, **top;
844 AV *av = newAV (); /* return values */ 1062 AV *av = newAV (); /* return values */
845 SV **cb; 1063 SV **cb;
… …
855 : cx->blk_gimme == G_SCALAR ? bot + 1 1073 : cx->blk_gimme == G_SCALAR ? bot + 1
856 : bot; 1074 : bot;
857 1075
858 av_extend (av, top - bot); 1076 av_extend (av, top - bot);
859 while (bot < top) 1077 while (bot < top)
860 av_push (av, SvREFCNT_inc (*bot++)); 1078 av_push (av, SvREFCNT_inc_NN (*bot++));
861 1079
862 PL_runops = RUNOPS_DEFAULT; 1080 PL_runops = RUNOPS_DEFAULT;
863 ENTER; 1081 ENTER;
864 SAVETMPS; 1082 SAVETMPS;
865 EXTEND (SP, 3); 1083 EXTEND (SP, 3);
… …
882 1100
883 if (PL_curcop != &PL_compiling) 1101 if (PL_curcop != &PL_compiling)
884 { 1102 {
885 SV **cb; 1103 SV **cb;
886 1104
887 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
888 { 1106 {
889 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
890 1108
891 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
892 { 1110 {
893 runops_proc_t old_runops = PL_runops;
894 dSP; 1111 dSP;
895 GV *gv = CvGV (cx->blk_sub.cv); 1112 GV *gv = CvGV (cx->blk_sub.cv);
896 SV *fullname = sv_2mortal (newSV (0)); 1113 SV *fullname = sv_2mortal (newSV (0));
897 1114
898 if (isGV (gv)) 1115 if (isGV (gv))
… …
903 SAVETMPS; 1120 SAVETMPS;
904 EXTEND (SP, 3); 1121 EXTEND (SP, 3);
905 PUSHMARK (SP); 1122 PUSHMARK (SP);
906 PUSHs (&PL_sv_yes); 1123 PUSHs (&PL_sv_yes);
907 PUSHs (fullname); 1124 PUSHs (fullname);
908 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1125 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
909 PUTBACK; 1126 PUTBACK;
910 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
911 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
912 SPAGAIN; 1129 SPAGAIN;
913 FREETMPS; 1130 FREETMPS;
… …
916 } 1133 }
917 1134
918 oldcxix = cxstack_ix; 1135 oldcxix = cxstack_ix;
919 } 1136 }
920 1137
921 if (cctx->flags & CC_TRACE_LINE) 1138 if (cctx_current->flags & CC_TRACE_LINE)
922 { 1139 {
923 dSP; 1140 dSP;
924 1141
925 PL_runops = RUNOPS_DEFAULT; 1142 PL_runops = RUNOPS_DEFAULT;
926 ENTER; 1143 ENTER;
… …
945 1162
946 TAINT_NOT; 1163 TAINT_NOT;
947 return 0; 1164 return 0;
948} 1165}
949 1166
950/* inject a fake call to Coro::State::_cctx_init into the execution */ 1167static struct CoroSLF cctx_ssl_frame;
951/* _cctx_init should be careful, as it could be called at almost any time */ 1168
952/* during execution of a perl program */ 1169static void
1170slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1171{
1172 ta->prev = 0;
1173}
1174
1175static int
1176slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1177{
1178 *frame = cctx_ssl_frame;
1179
1180 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1181}
1182
1183/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
953static void NOINLINE 1184static void NOINLINE
954cctx_prepare (pTHX_ coro_cctx *cctx) 1185cctx_prepare (pTHX)
955{ 1186{
956 dSP;
957 LOGOP myop;
958
959 PL_top_env = &PL_start_env; 1187 PL_top_env = &PL_start_env;
960 1188
961 if (cctx->flags & CC_TRACE) 1189 if (cctx_current->flags & CC_TRACE)
962 PL_runops = runops_trace; 1190 PL_runops = runops_trace;
963 1191
964 Zero (&myop, 1, LOGOP); 1192 /* we already must be executing an SLF op, there is no other valid way
965 myop.op_next = PL_op; 1193 * that can lead to creation of a new cctx */
966 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1194 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1195 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
967 1196
968 PUSHMARK (SP); 1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
969 EXTEND (SP, 2); 1198 cctx_ssl_frame = slf_frame;
970 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1199
971 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1200 slf_frame.prepare = slf_prepare_set_stacklevel;
972 PUTBACK; 1201 slf_frame.check = slf_check_set_stacklevel;
973 PL_op = (OP *)&myop; 1202}
974 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1203
975 SPAGAIN; 1204/* the tail of transfer: execute stuff we can only do after a transfer */
1205INLINE void
1206transfer_tail (pTHX)
1207{
1208 free_coro_mortal (aTHX);
976} 1209}
977 1210
978/* 1211/*
979 * this is a _very_ stripped down perl interpreter ;) 1212 * this is a _very_ stripped down perl interpreter ;)
980 */ 1213 */
981static void 1214static void
982cctx_run (void *arg) 1215cctx_run (void *arg)
983{ 1216{
1217#ifdef USE_ITHREADS
1218# if CORO_PTHREAD
1219 PERL_SET_CONTEXT (coro_thx);
1220# endif
1221#endif
1222 {
984 dTHX; 1223 dTHX;
985 1224
986 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1225 /* normally we would need to skip the entersub here */
987 UNLOCK; 1226 /* not doing so will re-execute it, which is exactly what we want */
988
989 /* we now skip the entersub that lead to transfer() */
990 PL_op = PL_op->op_next; 1227 /* PL_nop = PL_nop->op_next */
991 1228
992 /* inject a fake subroutine call to cctx_init */ 1229 /* inject a fake subroutine call to cctx_init */
993 cctx_prepare (aTHX_ (coro_cctx *)arg); 1230 cctx_prepare (aTHX);
994 1231
1232 /* cctx_run is the alternative tail of transfer() */
1233 transfer_tail (aTHX);
1234
995 /* somebody or something will hit me for both perl_run and PL_restartop */ 1235 /* somebody or something will hit me for both perl_run and PL_restartop */
996 PL_restartop = PL_op; 1236 PL_restartop = PL_op;
997 perl_run (PL_curinterp); 1237 perl_run (PL_curinterp);
998
999 /* 1238 /*
1239 * Unfortunately, there is no way to get at the return values of the
1240 * coro body here, as perl_run destroys these
1241 */
1242
1243 /*
1000 * If perl-run returns we assume exit() was being called or the coro 1244 * If perl-run returns we assume exit() was being called or the coro
1001 * fell off the end, which seems to be the only valid (non-bug) 1245 * fell off the end, which seems to be the only valid (non-bug)
1002 * reason for perl_run to return. We try to exit by jumping to the 1246 * reason for perl_run to return. We try to exit by jumping to the
1003 * bootstrap-time "top" top_env, as we cannot restore the "main" 1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
1004 * coroutine as Coro has no such concept 1248 * coroutine as Coro has no such concept.
1249 * This actually isn't valid with the pthread backend, but OSes requiring
1250 * that backend are too broken to do it in a standards-compliant way.
1005 */ 1251 */
1006 PL_top_env = main_top_env; 1252 PL_top_env = main_top_env;
1007 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1253 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1254 }
1008} 1255}
1009 1256
1010static coro_cctx * 1257static coro_cctx *
1011cctx_new () 1258cctx_new ()
1012{ 1259{
1013 coro_cctx *cctx; 1260 coro_cctx *cctx;
1261
1262 ++cctx_count;
1263 New (0, cctx, 1, coro_cctx);
1264
1265 cctx->gen = cctx_gen;
1266 cctx->flags = 0;
1267 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1268
1269 return cctx;
1270}
1271
1272/* create a new cctx only suitable as source */
1273static coro_cctx *
1274cctx_new_empty ()
1275{
1276 coro_cctx *cctx = cctx_new ();
1277
1278 cctx->sptr = 0;
1279 coro_create (&cctx->cctx, 0, 0, 0, 0);
1280
1281 return cctx;
1282}
1283
1284/* create a new cctx suitable as destination/running a perl interpreter */
1285static coro_cctx *
1286cctx_new_run ()
1287{
1288 coro_cctx *cctx = cctx_new ();
1014 void *stack_start; 1289 void *stack_start;
1015 size_t stack_size; 1290 size_t stack_size;
1016 1291
1017 ++cctx_count;
1018
1019 Newz (0, cctx, 1, coro_cctx);
1020
1021#if HAVE_MMAP 1292#if HAVE_MMAP
1022 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1293 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1023 /* mmap supposedly does allocate-on-write for us */ 1294 /* mmap supposedly does allocate-on-write for us */
1024 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1295 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1025 1296
1026 if (cctx->sptr != (void *)-1) 1297 if (cctx->sptr != (void *)-1)
1027 { 1298 {
1028# if CORO_STACKGUARD 1299 #if CORO_STACKGUARD
1029 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1300 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1030# endif 1301 #endif
1031 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1302 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1032 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1303 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1033 cctx->flags |= CC_MAPPED; 1304 cctx->flags |= CC_MAPPED;
1034 } 1305 }
1035 else 1306 else
1036#endif 1307#endif
1037 { 1308 {
1038 cctx->ssize = coro_stacksize * (long)sizeof (long); 1309 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1039 New (0, cctx->sptr, coro_stacksize, long); 1310 New (0, cctx->sptr, cctx_stacksize, long);
1040 1311
1041 if (!cctx->sptr) 1312 if (!cctx->sptr)
1042 { 1313 {
1043 perror ("FATAL: unable to allocate stack for coroutine"); 1314 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1044 _exit (EXIT_FAILURE); 1315 _exit (EXIT_FAILURE);
1045 } 1316 }
1046 1317
1047 stack_start = cctx->sptr; 1318 stack_start = cctx->sptr;
1048 stack_size = cctx->ssize; 1319 stack_size = cctx->ssize;
1049 } 1320 }
1050 1321
1051 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1322 #if CORO_USE_VALGRIND
1323 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1324 #endif
1325
1052 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1326 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1053 1327
1054 return cctx; 1328 return cctx;
1055} 1329}
1056 1330
… …
1058cctx_destroy (coro_cctx *cctx) 1332cctx_destroy (coro_cctx *cctx)
1059{ 1333{
1060 if (!cctx) 1334 if (!cctx)
1061 return; 1335 return;
1062 1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
1063 --cctx_count; 1339 --cctx_count;
1340 coro_destroy (&cctx->cctx);
1064 1341
1342 /* coro_transfer creates new, empty cctx's */
1343 if (cctx->sptr)
1344 {
1065#if CORO_USE_VALGRIND 1345 #if CORO_USE_VALGRIND
1066 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1346 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1067#endif 1347 #endif
1068 1348
1069#if HAVE_MMAP 1349#if HAVE_MMAP
1070 if (cctx->flags & CC_MAPPED) 1350 if (cctx->flags & CC_MAPPED)
1071 munmap (cctx->sptr, cctx->ssize); 1351 munmap (cctx->sptr, cctx->ssize);
1072 else 1352 else
1073#endif 1353#endif
1074 Safefree (cctx->sptr); 1354 Safefree (cctx->sptr);
1355 }
1075 1356
1076 Safefree (cctx); 1357 Safefree (cctx);
1077} 1358}
1078 1359
1079/* wether this cctx should be destructed */ 1360/* wether this cctx should be destructed */
1080#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1361#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1081 1362
1082static coro_cctx * 1363static coro_cctx *
1083cctx_get (pTHX) 1364cctx_get (pTHX)
1084{ 1365{
1085 while (expect_true (cctx_first)) 1366 while (expect_true (cctx_first))
… …
1092 return cctx; 1373 return cctx;
1093 1374
1094 cctx_destroy (cctx); 1375 cctx_destroy (cctx);
1095 } 1376 }
1096 1377
1097 return cctx_new (); 1378 return cctx_new_run ();
1098} 1379}
1099 1380
1100static void 1381static void
1101cctx_put (coro_cctx *cctx) 1382cctx_put (coro_cctx *cctx)
1102{ 1383{
1384 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1385
1103 /* free another cctx if overlimit */ 1386 /* free another cctx if overlimit */
1104 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1387 if (expect_false (cctx_idle >= cctx_max_idle))
1105 { 1388 {
1106 coro_cctx *first = cctx_first; 1389 coro_cctx *first = cctx_first;
1107 cctx_first = first->next; 1390 cctx_first = first->next;
1108 --cctx_idle; 1391 --cctx_idle;
1109 1392
… …
1118/** coroutine switching *****************************************************/ 1401/** coroutine switching *****************************************************/
1119 1402
1120static void 1403static void
1121transfer_check (pTHX_ struct coro *prev, struct coro *next) 1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
1122{ 1405{
1406 /* TODO: throwing up here is considered harmful */
1407
1123 if (expect_true (prev != next)) 1408 if (expect_true (prev != next))
1124 { 1409 {
1125 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1126 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1411 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1127 1412
1128 if (expect_false (next->flags & CF_RUNNING))
1129 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1130
1131 if (expect_false (next->flags & CF_DESTROYED)) 1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1132 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1414 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1133 1415
1134#if !PERL_VERSION_ATLEAST (5,10,0) 1416#if !PERL_VERSION_ATLEAST (5,10,0)
1135 if (expect_false (PL_lex_state != LEX_NOTPARSING) 1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1136 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1418 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1137#endif 1419#endif
1138 } 1420 }
1139} 1421}
1140 1422
1141/* always use the TRANSFER macro */ 1423/* always use the TRANSFER macro */
1142static void NOINLINE 1424static void NOINLINE /* noinline so we have a fixed stackframe */
1143transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1144{ 1426{
1145 dSTACKLEVEL; 1427 dSTACKLEVEL;
1146 static volatile int has_throw;
1147 1428
1148 /* sometimes transfer is only called to set idle_sp */ 1429 /* sometimes transfer is only called to set idle_sp */
1149 if (expect_false (!next)) 1430 if (expect_false (!prev))
1150 { 1431 {
1151 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1432 cctx_current->idle_sp = STACKLEVEL;
1152 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1433 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1153 } 1434 }
1154 else if (expect_true (prev != next)) 1435 else if (expect_true (prev != next))
1155 { 1436 {
1156 coro_cctx *prev__cctx; 1437 coro_cctx *cctx_prev;
1157 1438
1158 if (expect_false (prev->flags & CF_NEW)) 1439 if (expect_false (prev->flags & CF_NEW))
1159 { 1440 {
1160 /* create a new empty context */ 1441 /* create a new empty/source context */
1161 Newz (0, prev->cctx, 1, coro_cctx);
1162 prev->flags &= ~CF_NEW; 1442 prev->flags &= ~CF_NEW;
1163 prev->flags |= CF_RUNNING; 1443 prev->flags |= CF_RUNNING;
1164 } 1444 }
1165 1445
1166 prev->flags &= ~CF_RUNNING; 1446 prev->flags &= ~CF_RUNNING;
1167 next->flags |= CF_RUNNING; 1447 next->flags |= CF_RUNNING;
1168
1169 LOCK;
1170 1448
1171 /* first get rid of the old state */ 1449 /* first get rid of the old state */
1172 save_perl (aTHX_ prev); 1450 save_perl (aTHX_ prev);
1173 1451
1174 if (expect_false (next->flags & CF_NEW)) 1452 if (expect_false (next->flags & CF_NEW))
… …
1179 coro_setup (aTHX_ next); 1457 coro_setup (aTHX_ next);
1180 } 1458 }
1181 else 1459 else
1182 load_perl (aTHX_ next); 1460 load_perl (aTHX_ next);
1183 1461
1184 prev__cctx = prev->cctx;
1185
1186 /* possibly "free" the cctx */ 1462 /* possibly untie and reuse the cctx */
1187 if (expect_true ( 1463 if (expect_true (
1188 prev__cctx->idle_sp == STACKLEVEL 1464 cctx_current->idle_sp == STACKLEVEL
1189 && !(prev__cctx->flags & CC_TRACE) 1465 && !(cctx_current->flags & CC_TRACE)
1190 && !force_cctx 1466 && !force_cctx
1191 )) 1467 ))
1192 { 1468 {
1193 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1194 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1470 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1195 1471
1196 prev->cctx = 0;
1197
1198 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1472 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1199 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1473 /* without this the next cctx_get might destroy the running cctx while still in use */
1200 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1474 if (expect_false (CCTX_EXPIRED (cctx_current)))
1201 if (!next->cctx) 1475 if (expect_true (!next->cctx))
1202 next->cctx = cctx_get (aTHX); 1476 next->cctx = cctx_get (aTHX);
1203 1477
1204 cctx_put (prev__cctx); 1478 cctx_put (cctx_current);
1205 } 1479 }
1480 else
1481 prev->cctx = cctx_current;
1206 1482
1207 ++next->usecount; 1483 ++next->usecount;
1208 1484
1209 if (expect_true (!next->cctx)) 1485 cctx_prev = cctx_current;
1210 next->cctx = cctx_get (aTHX); 1486 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1211 1487
1212 has_throw = !!next->throw; 1488 next->cctx = 0;
1213 1489
1214 if (expect_false (prev__cctx != next->cctx)) 1490 if (expect_false (cctx_prev != cctx_current))
1215 { 1491 {
1216 prev__cctx->top_env = PL_top_env; 1492 cctx_prev->top_env = PL_top_env;
1217 PL_top_env = next->cctx->top_env; 1493 PL_top_env = cctx_current->top_env;
1218 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1219 } 1495 }
1220 1496
1221 free_coro_mortal (aTHX); 1497 transfer_tail (aTHX);
1222 UNLOCK;
1223
1224 if (expect_false (has_throw))
1225 {
1226 struct coro *coro = SvSTATE (coro_current);
1227
1228 if (coro->throw)
1229 {
1230 SV *exception = coro->throw;
1231 coro->throw = 0;
1232 sv_setsv (ERRSV, exception);
1233 croak (0);
1234 }
1235 }
1236 } 1498 }
1237} 1499}
1238
1239struct transfer_args
1240{
1241 struct coro *prev, *next;
1242};
1243 1500
1244#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1501#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1245#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1502#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1246 1503
1247/** high level stuff ********************************************************/ 1504/** high level stuff ********************************************************/
… …
1249static int 1506static int
1250coro_state_destroy (pTHX_ struct coro *coro) 1507coro_state_destroy (pTHX_ struct coro *coro)
1251{ 1508{
1252 if (coro->flags & CF_DESTROYED) 1509 if (coro->flags & CF_DESTROYED)
1253 return 0; 1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1254 1514
1255 coro->flags |= CF_DESTROYED; 1515 coro->flags |= CF_DESTROYED;
1256 1516
1257 if (coro->flags & CF_READY) 1517 if (coro->flags & CF_READY)
1258 { 1518 {
1259 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1260 /* alternative: look through all ready queues and remove the coro */ 1520 /* alternative: look through all ready queues and remove the coro */
1261 LOCK;
1262 --coro_nready; 1521 --coro_nready;
1263 UNLOCK;
1264 } 1522 }
1265 else 1523 else
1266 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1524 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1267 1525
1268 if (coro->mainstack && coro->mainstack != main_mainstack) 1526 if (coro->mainstack
1269 { 1527 && coro->mainstack != main_mainstack
1270 struct coro temp; 1528 && coro->slot
1271 1529 && !PL_dirty)
1272 if (coro->flags & CF_RUNNING)
1273 croak ("FATAL: tried to destroy currently running coroutine");
1274
1275 save_perl (aTHX_ &temp);
1276 load_perl (aTHX_ coro);
1277
1278 coro_destroy (aTHX_ coro); 1530 coro_destruct_perl (aTHX_ coro);
1279
1280 load_perl (aTHX_ &temp);
1281
1282 coro->slot = 0;
1283 }
1284 1531
1285 cctx_destroy (coro->cctx); 1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1286 SvREFCNT_dec (coro->args); 1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1287 1536
1288 if (coro->next) coro->next->prev = coro->prev; 1537 if (coro->next) coro->next->prev = coro->prev;
1289 if (coro->prev) coro->prev->next = coro->next; 1538 if (coro->prev) coro->prev->next = coro->next;
1290 if (coro == coro_first) coro_first = coro->next; 1539 if (coro == coro_first) coro_first = coro->next;
1291 1540
… …
1329# define MGf_DUP 0 1578# define MGf_DUP 0
1330#endif 1579#endif
1331}; 1580};
1332 1581
1333static void 1582static void
1334prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1583prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1335{ 1584{
1336 ta->prev = SvSTATE (prev_sv); 1585 ta->prev = SvSTATE (prev_sv);
1337 ta->next = SvSTATE (next_sv); 1586 ta->next = SvSTATE (next_sv);
1338 TRANSFER_CHECK (*ta); 1587 TRANSFER_CHECK (*ta);
1339} 1588}
1340 1589
1341static void 1590static void
1342api_transfer (SV *prev_sv, SV *next_sv) 1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1343{ 1592{
1344 dTHX;
1345 struct transfer_args ta; 1593 struct coro_transfer_args ta;
1346 1594
1347 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1348 TRANSFER (ta, 1); 1596 TRANSFER (ta, 1);
1349} 1597}
1350 1598
1599/*****************************************************************************/
1600/* gensub: simple closure generation utility */
1601
1602#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1603
1604/* create a closure from XS, returns a code reference */
1605/* the arg can be accessed via GENSUB_ARG from the callback */
1606/* the callback must use dXSARGS/XSRETURN */
1607static SV *
1608gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1609{
1610 CV *cv = (CV *)newSV (0);
1611
1612 sv_upgrade ((SV *)cv, SVt_PVCV);
1613
1614 CvANON_on (cv);
1615 CvISXSUB_on (cv);
1616 CvXSUB (cv) = xsub;
1617 GENSUB_ARG = arg;
1618
1619 return newRV_noinc ((SV *)cv);
1620}
1621
1351/** Coro ********************************************************************/ 1622/** Coro ********************************************************************/
1352 1623
1353static void 1624INLINE void
1354coro_enq (pTHX_ SV *coro_sv) 1625coro_enq (pTHX_ struct coro *coro)
1355{ 1626{
1356 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1357}
1358 1628
1359static SV * 1629 SvREFCNT_inc_NN (coro->hv);
1630
1631 coro->next_ready = 0;
1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1633 ready [1] = coro;
1634}
1635
1636INLINE struct coro *
1360coro_deq (pTHX) 1637coro_deq (pTHX)
1361{ 1638{
1362 int prio; 1639 int prio;
1363 1640
1364 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1365 if (AvFILLp (coro_ready [prio]) >= 0) 1642 {
1366 return av_shift (coro_ready [prio]); 1643 struct coro **ready = coro_ready [prio];
1644
1645 if (ready [0])
1646 {
1647 struct coro *coro = ready [0];
1648 ready [0] = coro->next_ready;
1649 return coro;
1650 }
1651 }
1367 1652
1368 return 0; 1653 return 0;
1369} 1654}
1370 1655
1371static int 1656static int
1372api_ready (SV *coro_sv) 1657api_ready (pTHX_ SV *coro_sv)
1373{ 1658{
1374 dTHX;
1375 struct coro *coro; 1659 struct coro *coro;
1376 1660 SV *sv_hook;
1377 if (SvROK (coro_sv)) 1661 void (*xs_hook)(void);
1378 coro_sv = SvRV (coro_sv);
1379 1662
1380 coro = SvSTATE (coro_sv); 1663 coro = SvSTATE (coro_sv);
1381 1664
1382 if (coro->flags & CF_READY) 1665 if (coro->flags & CF_READY)
1383 return 0; 1666 return 0;
1384 1667
1385 coro->flags |= CF_READY; 1668 coro->flags |= CF_READY;
1386 1669
1387 LOCK; 1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1388 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1672
1673 coro_enq (aTHX_ coro);
1389 ++coro_nready; 1674 ++coro_nready;
1390 UNLOCK; 1675
1676 if (sv_hook)
1677 {
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (sv_hook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
1689 }
1690
1691 if (xs_hook)
1692 xs_hook ();
1391 1693
1392 return 1; 1694 return 1;
1393} 1695}
1394 1696
1395static int 1697static int
1396api_is_ready (SV *coro_sv) 1698api_is_ready (pTHX_ SV *coro_sv)
1397{ 1699{
1398 dTHX;
1399 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1400} 1701}
1401 1702
1402static void 1703/* expects to own a reference to next->hv */
1704INLINE void
1403prepare_schedule (pTHX_ struct transfer_args *ta) 1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1404{ 1706{
1405 SV *prev_sv, *next_sv;
1406
1407 for (;;)
1408 {
1409 LOCK;
1410 next_sv = coro_deq (aTHX);
1411
1412 /* nothing to schedule: call the idle handler */
1413 if (expect_false (!next_sv))
1414 {
1415 dSP;
1416 UNLOCK;
1417
1418 ENTER;
1419 SAVETMPS;
1420
1421 PUSHMARK (SP);
1422 PUTBACK;
1423 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1424 SPAGAIN;
1425
1426 FREETMPS;
1427 LEAVE;
1428 continue;
1429 }
1430
1431 ta->next = SvSTATE (next_sv);
1432
1433 /* cannot transfer to destroyed coros, skip and look for next */
1434 if (expect_false (ta->next->flags & CF_DESTROYED))
1435 {
1436 UNLOCK;
1437 SvREFCNT_dec (next_sv);
1438 /* coro_nready is already taken care of by destroy */
1439 continue;
1440 }
1441
1442 --coro_nready;
1443 UNLOCK;
1444 break;
1445 }
1446
1447 /* free this only after the transfer */
1448 prev_sv = SvRV (coro_current); 1707 SV *prev_sv = SvRV (coro_current);
1708
1449 ta->prev = SvSTATE (prev_sv); 1709 ta->prev = SvSTATE_hv (prev_sv);
1710 ta->next = next;
1711
1450 TRANSFER_CHECK (*ta); 1712 TRANSFER_CHECK (*ta);
1451 assert (ta->next->flags & CF_READY); 1713
1452 ta->next->flags &= ~CF_READY;
1453 SvRV_set (coro_current, next_sv); 1714 SvRV_set (coro_current, (SV *)next->hv);
1454 1715
1455 LOCK;
1456 free_coro_mortal (aTHX); 1716 free_coro_mortal (aTHX);
1457 coro_mortal = prev_sv; 1717 coro_mortal = prev_sv;
1458 UNLOCK;
1459} 1718}
1460 1719
1461static void 1720static void
1721prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1722{
1723 for (;;)
1724 {
1725 struct coro *next = coro_deq (aTHX);
1726
1727 if (expect_true (next))
1728 {
1729 /* cannot transfer to destroyed coros, skip and look for next */
1730 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1731 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1732 else
1733 {
1734 next->flags &= ~CF_READY;
1735 --coro_nready;
1736
1737 prepare_schedule_to (aTHX_ ta, next);
1738 break;
1739 }
1740 }
1741 else
1742 {
1743 /* nothing to schedule: call the idle handler */
1744 if (SvROK (sv_idle)
1745 && SvOBJECT (SvRV (sv_idle)))
1746 {
1747 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1748 api_ready (aTHX_ SvRV (sv_idle));
1749 --coro_nready;
1750 }
1751 else
1752 {
1753 dSP;
1754
1755 ENTER;
1756 SAVETMPS;
1757
1758 PUSHMARK (SP);
1759 PUTBACK;
1760 call_sv (sv_idle, G_VOID | G_DISCARD);
1761
1762 FREETMPS;
1763 LEAVE;
1764 }
1765 }
1766 }
1767}
1768
1769INLINE void
1462prepare_cede (pTHX_ struct transfer_args *ta) 1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1463{ 1771{
1464 api_ready (coro_current); 1772 api_ready (aTHX_ coro_current);
1465 prepare_schedule (aTHX_ ta); 1773 prepare_schedule (aTHX_ ta);
1466} 1774}
1467 1775
1776INLINE void
1777prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1778{
1779 SV *prev = SvRV (coro_current);
1780
1781 if (coro_nready)
1782 {
1783 prepare_schedule (aTHX_ ta);
1784 api_ready (aTHX_ prev);
1785 }
1786 else
1787 prepare_nop (aTHX_ ta);
1788}
1789
1790static void
1791api_schedule (pTHX)
1792{
1793 struct coro_transfer_args ta;
1794
1795 prepare_schedule (aTHX_ &ta);
1796 TRANSFER (ta, 1);
1797}
1798
1799static void
1800api_schedule_to (pTHX_ SV *coro_sv)
1801{
1802 struct coro_transfer_args ta;
1803 struct coro *next = SvSTATE (coro_sv);
1804
1805 SvREFCNT_inc_NN (coro_sv);
1806 prepare_schedule_to (aTHX_ &ta, next);
1807}
1808
1468static int 1809static int
1469prepare_cede_notself (pTHX_ struct transfer_args *ta) 1810api_cede (pTHX)
1470{ 1811{
1471 if (coro_nready) 1812 struct coro_transfer_args ta;
1472 { 1813
1473 SV *prev = SvRV (coro_current);
1474 prepare_schedule (aTHX_ ta); 1814 prepare_cede (aTHX_ &ta);
1475 api_ready (prev); 1815
1816 if (expect_true (ta.prev != ta.next))
1817 {
1818 TRANSFER (ta, 1);
1476 return 1; 1819 return 1;
1477 } 1820 }
1478 else 1821 else
1479 return 0; 1822 return 0;
1480} 1823}
1481 1824
1482static void
1483api_schedule (void)
1484{
1485 dTHX;
1486 struct transfer_args ta;
1487
1488 prepare_schedule (aTHX_ &ta);
1489 TRANSFER (ta, 1);
1490}
1491
1492static int 1825static int
1493api_cede (void) 1826api_cede_notself (pTHX)
1494{ 1827{
1495 dTHX; 1828 if (coro_nready)
1829 {
1496 struct transfer_args ta; 1830 struct coro_transfer_args ta;
1497 1831
1498 prepare_cede (aTHX_ &ta); 1832 prepare_cede_notself (aTHX_ &ta);
1499
1500 if (expect_true (ta.prev != ta.next))
1501 {
1502 TRANSFER (ta, 1); 1833 TRANSFER (ta, 1);
1503 return 1; 1834 return 1;
1504 } 1835 }
1505 else 1836 else
1506 return 0; 1837 return 0;
1507} 1838}
1508 1839
1509static int 1840static void
1510api_cede_notself (void)
1511{
1512 dTHX;
1513 struct transfer_args ta;
1514
1515 if (prepare_cede_notself (aTHX_ &ta))
1516 {
1517 TRANSFER (ta, 1);
1518 return 1;
1519 }
1520 else
1521 return 0;
1522}
1523
1524static void
1525api_trace (SV *coro_sv, int flags) 1841api_trace (pTHX_ SV *coro_sv, int flags)
1526{ 1842{
1527 dTHX;
1528 struct coro *coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1529 1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1847
1530 if (flags & CC_TRACE) 1848 if (flags & CC_TRACE)
1531 { 1849 {
1532 if (!coro->cctx) 1850 if (!coro->cctx)
1533 coro->cctx = cctx_new (); 1851 coro->cctx = cctx_new_run ();
1534 else if (!(coro->cctx->flags & CC_TRACE)) 1852 else if (!(coro->cctx->flags & CC_TRACE))
1535 croak ("cannot enable tracing on coroutine with custom stack"); 1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1536 1854
1537 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1538 } 1856 }
1539 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1540 { 1858 {
… …
1545 else 1863 else
1546 coro->slot->runops = RUNOPS_DEFAULT; 1864 coro->slot->runops = RUNOPS_DEFAULT;
1547 } 1865 }
1548} 1866}
1549 1867
1868static void
1869coro_call_on_destroy (pTHX_ struct coro *coro)
1870{
1871 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1872 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1873
1874 if (on_destroyp)
1875 {
1876 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1877
1878 while (AvFILLp (on_destroy) >= 0)
1879 {
1880 dSP; /* don't disturb outer sp */
1881 SV *cb = av_pop (on_destroy);
1882
1883 PUSHMARK (SP);
1884
1885 if (statusp)
1886 {
1887 int i;
1888 AV *status = (AV *)SvRV (*statusp);
1889 EXTEND (SP, AvFILLp (status) + 1);
1890
1891 for (i = 0; i <= AvFILLp (status); ++i)
1892 PUSHs (AvARRAY (status)[i]);
1893 }
1894
1895 PUTBACK;
1896 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1897 }
1898 }
1899}
1900
1901static void
1902slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 int i;
1905 HV *hv = (HV *)SvRV (coro_current);
1906 AV *av = newAV ();
1907
1908 av_extend (av, items - 1);
1909 for (i = 0; i < items; ++i)
1910 av_push (av, SvREFCNT_inc_NN (arg [i]));
1911
1912 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1913
1914 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1915 api_ready (aTHX_ sv_manager);
1916
1917 frame->prepare = prepare_schedule;
1918 frame->check = slf_check_repeat;
1919
1920 /* as a minor optimisation, we could unwind all stacks here */
1921 /* but that puts extra pressure on pp_slf, and is not worth much */
1922 /*coro_unwind_stacks (aTHX);*/
1923}
1924
1925/*****************************************************************************/
1926/* async pool handler */
1927
1928static int
1929slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1930{
1931 HV *hv = (HV *)SvRV (coro_current);
1932 struct coro *coro = (struct coro *)frame->data;
1933
1934 if (!coro->invoke_cb)
1935 return 1; /* loop till we have invoke */
1936 else
1937 {
1938 hv_store (hv, "desc", sizeof ("desc") - 1,
1939 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1940
1941 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1942
1943 {
1944 dSP;
1945 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1946 PUTBACK;
1947 }
1948
1949 SvREFCNT_dec (GvAV (PL_defgv));
1950 GvAV (PL_defgv) = coro->invoke_av;
1951 coro->invoke_av = 0;
1952
1953 return 0;
1954 }
1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
2058
2059 return 0;
2060}
2061
2062static void
2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 SV *cb;
2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
2400
2401/*****************************************************************************/
2402/* PerlIO::cede */
2403
2404typedef struct
2405{
2406 PerlIOBuf base;
2407 NV next, every;
2408} PerlIOCede;
2409
2410static IV
2411PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2412{
2413 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2414
2415 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2416 self->next = nvtime () + self->every;
2417
2418 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2419}
2420
2421static SV *
2422PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2423{
2424 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2425
2426 return newSVnv (self->every);
2427}
2428
2429static IV
2430PerlIOCede_flush (pTHX_ PerlIO *f)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433 double now = nvtime ();
2434
2435 if (now >= self->next)
2436 {
2437 api_cede (aTHX);
2438 self->next = now + self->every;
2439 }
2440
2441 return PerlIOBuf_flush (aTHX_ f);
2442}
2443
2444static PerlIO_funcs PerlIO_cede =
2445{
2446 sizeof(PerlIO_funcs),
2447 "cede",
2448 sizeof(PerlIOCede),
2449 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2450 PerlIOCede_pushed,
2451 PerlIOBuf_popped,
2452 PerlIOBuf_open,
2453 PerlIOBase_binmode,
2454 PerlIOCede_getarg,
2455 PerlIOBase_fileno,
2456 PerlIOBuf_dup,
2457 PerlIOBuf_read,
2458 PerlIOBuf_unread,
2459 PerlIOBuf_write,
2460 PerlIOBuf_seek,
2461 PerlIOBuf_tell,
2462 PerlIOBuf_close,
2463 PerlIOCede_flush,
2464 PerlIOBuf_fill,
2465 PerlIOBase_eof,
2466 PerlIOBase_error,
2467 PerlIOBase_clearerr,
2468 PerlIOBase_setlinebuf,
2469 PerlIOBuf_get_base,
2470 PerlIOBuf_bufsiz,
2471 PerlIOBuf_get_ptr,
2472 PerlIOBuf_get_cnt,
2473 PerlIOBuf_set_ptrcnt,
2474};
2475
2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
2478
2479static SV *
2480coro_waitarray_new (pTHX_ int count)
2481{
2482 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 if (SvTYPE (cb) == SVt_PVCV)
2671 {
2672 dSP;
2673 PUSHMARK (SP);
2674 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2675 PUTBACK;
2676 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2677 }
2678 else
2679 {
2680 api_ready (aTHX_ cb);
2681 sv_setiv (cb, 0); /* signal waiter */
2682 }
2683
2684 SvREFCNT_dec (cb);
2685
2686 --count;
2687 }
2688}
2689
2690static int
2691slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2692{
2693 /* if we are about to throw, also stop waiting */
2694 return SvROK ((SV *)frame->data) && !CORO_THROW;
2695}
2696
2697static void
2698slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2699{
2700 AV *av = (AV *)SvRV (arg [0]);
2701
2702 if (items >= 2)
2703 {
2704 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2705 av_push (av, SvREFCNT_inc_NN (cb_cv));
2706
2707 if (SvIVX (AvARRAY (av)[0]))
2708 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2709
2710 frame->prepare = prepare_nop;
2711 frame->check = slf_check_nop;
2712 }
2713 else if (SvIVX (AvARRAY (av)[0]))
2714 {
2715 SvIVX (AvARRAY (av)[0]) = 0;
2716 frame->prepare = prepare_nop;
2717 frame->check = slf_check_nop;
2718 }
2719 else
2720 {
2721 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2722
2723 av_push (av, waiter);
2724
2725 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2726 frame->prepare = prepare_schedule;
2727 frame->check = slf_check_signal_wait;
2728 }
2729}
2730
2731/*****************************************************************************/
2732/* Coro::AIO */
2733
2734#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2735
2736/* helper storage struct */
2737struct io_state
2738{
2739 int errorno;
2740 I32 laststype; /* U16 in 5.10.0 */
2741 int laststatval;
2742 Stat_t statcache;
2743};
2744
2745static void
2746coro_aio_callback (pTHX_ CV *cv)
2747{
2748 dXSARGS;
2749 AV *state = (AV *)GENSUB_ARG;
2750 SV *coro = av_pop (state);
2751 SV *data_sv = newSV (sizeof (struct io_state));
2752
2753 av_extend (state, items - 1);
2754
2755 sv_upgrade (data_sv, SVt_PV);
2756 SvCUR_set (data_sv, sizeof (struct io_state));
2757 SvPOK_only (data_sv);
2758
2759 {
2760 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2761
2762 data->errorno = errno;
2763 data->laststype = PL_laststype;
2764 data->laststatval = PL_laststatval;
2765 data->statcache = PL_statcache;
2766 }
2767
2768 /* now build the result vector out of all the parameters and the data_sv */
2769 {
2770 int i;
2771
2772 for (i = 0; i < items; ++i)
2773 av_push (state, SvREFCNT_inc_NN (ST (i)));
2774 }
2775
2776 av_push (state, data_sv);
2777
2778 api_ready (aTHX_ coro);
2779 SvREFCNT_dec (coro);
2780 SvREFCNT_dec ((AV *)state);
2781}
2782
2783static int
2784slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2785{
2786 AV *state = (AV *)frame->data;
2787
2788 /* if we are about to throw, return early */
2789 /* this does not cancel the aio request, but at least */
2790 /* it quickly returns */
2791 if (CORO_THROW)
2792 return 0;
2793
2794 /* one element that is an RV? repeat! */
2795 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2796 return 1;
2797
2798 /* restore status */
2799 {
2800 SV *data_sv = av_pop (state);
2801 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2802
2803 errno = data->errorno;
2804 PL_laststype = data->laststype;
2805 PL_laststatval = data->laststatval;
2806 PL_statcache = data->statcache;
2807
2808 SvREFCNT_dec (data_sv);
2809 }
2810
2811 /* push result values */
2812 {
2813 dSP;
2814 int i;
2815
2816 EXTEND (SP, AvFILLp (state) + 1);
2817 for (i = 0; i <= AvFILLp (state); ++i)
2818 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2819
2820 PUTBACK;
2821 }
2822
2823 return 0;
2824}
2825
2826static void
2827slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2828{
2829 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2830 SV *coro_hv = SvRV (coro_current);
2831 struct coro *coro = SvSTATE_hv (coro_hv);
2832
2833 /* put our coroutine id on the state arg */
2834 av_push (state, SvREFCNT_inc_NN (coro_hv));
2835
2836 /* first see whether we have a non-zero priority and set it as AIO prio */
2837 if (coro->prio)
2838 {
2839 dSP;
2840
2841 static SV *prio_cv;
2842 static SV *prio_sv;
2843
2844 if (expect_false (!prio_cv))
2845 {
2846 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2847 prio_sv = newSViv (0);
2848 }
2849
2850 PUSHMARK (SP);
2851 sv_setiv (prio_sv, coro->prio);
2852 XPUSHs (prio_sv);
2853
2854 PUTBACK;
2855 call_sv (prio_cv, G_VOID | G_DISCARD);
2856 }
2857
2858 /* now call the original request */
2859 {
2860 dSP;
2861 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2862 int i;
2863
2864 PUSHMARK (SP);
2865
2866 /* first push all args to the stack */
2867 EXTEND (SP, items + 1);
2868
2869 for (i = 0; i < items; ++i)
2870 PUSHs (arg [i]);
2871
2872 /* now push the callback closure */
2873 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2874
2875 /* now call the AIO function - we assume our request is uncancelable */
2876 PUTBACK;
2877 call_sv ((SV *)req, G_VOID | G_DISCARD);
2878 }
2879
2880 /* now that the requets is going, we loop toll we have a result */
2881 frame->data = (void *)state;
2882 frame->prepare = prepare_schedule;
2883 frame->check = slf_check_aio_req;
2884}
2885
2886static void
2887coro_aio_req_xs (pTHX_ CV *cv)
2888{
2889 dXSARGS;
2890
2891 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2892
2893 XSRETURN_EMPTY;
2894}
2895
2896/*****************************************************************************/
2897
2898#if CORO_CLONE
2899# include "clone.c"
2900#endif
2901
1550MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2902MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1551 2903
1552PROTOTYPES: DISABLE 2904PROTOTYPES: DISABLE
1553 2905
1554BOOT: 2906BOOT:
1555{ 2907{
1556#ifdef USE_ITHREADS 2908#ifdef USE_ITHREADS
1557 MUTEX_INIT (&coro_mutex); 2909# if CORO_PTHREAD
2910 coro_thx = PERL_GET_CONTEXT;
2911# endif
1558#endif 2912#endif
1559 BOOT_PAGESIZE; 2913 BOOT_PAGESIZE;
2914
2915 cctx_current = cctx_new_empty ();
1560 2916
1561 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2917 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1562 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2918 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1563 2919
1564 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2920 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1565 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2921 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1566 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2922 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1567 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1568 2923
1569 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2924 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1570 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2925 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1571 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2926 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1572 2927
… …
1581 main_top_env = PL_top_env; 2936 main_top_env = PL_top_env;
1582 2937
1583 while (main_top_env->je_prev) 2938 while (main_top_env->je_prev)
1584 main_top_env = main_top_env->je_prev; 2939 main_top_env = main_top_env->je_prev;
1585 2940
2941 {
2942 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2943
2944 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2945 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2946
2947 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2948 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2949 }
2950
1586 coroapi.ver = CORO_API_VERSION; 2951 coroapi.ver = CORO_API_VERSION;
1587 coroapi.rev = CORO_API_REVISION; 2952 coroapi.rev = CORO_API_REVISION;
2953
1588 coroapi.transfer = api_transfer; 2954 coroapi.transfer = api_transfer;
2955
2956 coroapi.sv_state = SvSTATE_;
2957 coroapi.execute_slf = api_execute_slf;
2958 coroapi.prepare_nop = prepare_nop;
2959 coroapi.prepare_schedule = prepare_schedule;
2960 coroapi.prepare_cede = prepare_cede;
2961 coroapi.prepare_cede_notself = prepare_cede_notself;
2962
2963 {
2964 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2965
2966 if (!svp) croak ("Time::HiRes is required");
2967 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2968
2969 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2970 }
1589 2971
1590 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2972 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1591} 2973}
1592 2974
1593SV * 2975SV *
1594new (char *klass, ...) 2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
1595 CODE: 2979 CODE:
1596{ 2980{
1597 struct coro *coro; 2981 struct coro *coro;
1598 MAGIC *mg; 2982 MAGIC *mg;
1599 HV *hv; 2983 HV *hv;
2984 CV *cb;
1600 int i; 2985 int i;
2986
2987 if (items > 1)
2988 {
2989 cb = coro_sv_2cv (aTHX_ ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
1601 3000
1602 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
1603 coro->args = newAV (); 3002 coro->args = newAV ();
1604 coro->flags = CF_NEW; 3003 coro->flags = CF_NEW;
1605 3004
… …
1610 coro->hv = hv = newHV (); 3009 coro->hv = hv = newHV ();
1611 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1612 mg->mg_flags |= MGf_DUP; 3011 mg->mg_flags |= MGf_DUP;
1613 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1614 3013
3014 if (items > 1)
3015 {
1615 av_extend (coro->args, items - 1); 3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
1616 for (i = 1; i < items; i++) 3026 for (i = 2; i < items; i++)
1617 av_push (coro->args, newSVsv (ST (i))); 3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
1618} 3029}
1619 OUTPUT: 3030 OUTPUT:
1620 RETVAL 3031 RETVAL
1621 3032
1622# these not obviously related functions are all rolled into the same xs
1623# function to increase chances that they all will call transfer with the same
1624# stack offset
1625void 3033void
1626_set_stacklevel (...) 3034transfer (...)
1627 ALIAS: 3035 PROTOTYPE: $$
1628 Coro::State::transfer = 1 3036 CODE:
1629 Coro::schedule = 2 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1630 Coro::cede = 3
1631 Coro::cede_notself = 4
1632 CODE:
1633{
1634 struct transfer_args ta;
1635
1636 PUTBACK;
1637 switch (ix)
1638 {
1639 case 0:
1640 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1641 ta.next = 0;
1642 break;
1643
1644 case 1:
1645 if (items != 2)
1646 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1647
1648 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1649 break;
1650
1651 case 2:
1652 prepare_schedule (aTHX_ &ta);
1653 break;
1654
1655 case 3:
1656 prepare_cede (aTHX_ &ta);
1657 break;
1658
1659 case 4:
1660 if (!prepare_cede_notself (aTHX_ &ta))
1661 XSRETURN_EMPTY;
1662
1663 break;
1664 }
1665 SPAGAIN;
1666
1667 BARRIER;
1668 PUTBACK;
1669 TRANSFER (ta, 0);
1670 SPAGAIN; /* might be the sp of a different coroutine now */
1671 /* be extra careful not to ever do anything after TRANSFER */
1672}
1673 3038
1674bool 3039bool
1675_destroy (SV *coro_sv) 3040_destroy (SV *coro_sv)
1676 CODE: 3041 CODE:
1677 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1678 OUTPUT: 3043 OUTPUT:
1679 RETVAL 3044 RETVAL
1680 3045
1681void 3046void
1682_exit (code) 3047_exit (int code)
1683 int code
1684 PROTOTYPE: $ 3048 PROTOTYPE: $
1685 CODE: 3049 CODE:
1686 _exit (code); 3050 _exit (code);
1687 3051
3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
3070
1688int 3071int
1689cctx_stacksize (int new_stacksize = 0) 3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
1690 CODE: 3074 CODE:
1691 RETVAL = coro_stacksize; 3075 RETVAL = cctx_stacksize;
1692 if (new_stacksize) 3076 if (new_stacksize)
3077 {
1693 coro_stacksize = new_stacksize; 3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
1694 OUTPUT: 3081 OUTPUT:
1695 RETVAL 3082 RETVAL
1696 3083
1697int 3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
1698cctx_count () 3095cctx_count ()
3096 PROTOTYPE:
1699 CODE: 3097 CODE:
1700 RETVAL = cctx_count; 3098 RETVAL = cctx_count;
1701 OUTPUT: 3099 OUTPUT:
1702 RETVAL 3100 RETVAL
1703 3101
1704int 3102int
1705cctx_idle () 3103cctx_idle ()
3104 PROTOTYPE:
1706 CODE: 3105 CODE:
1707 RETVAL = cctx_idle; 3106 RETVAL = cctx_idle;
1708 OUTPUT: 3107 OUTPUT:
1709 RETVAL 3108 RETVAL
1710 3109
1711void 3110void
1712list () 3111list ()
3112 PROTOTYPE:
1713 PPCODE: 3113 PPCODE:
1714{ 3114{
1715 struct coro *coro; 3115 struct coro *coro;
1716 for (coro = coro_first; coro; coro = coro->next) 3116 for (coro = coro_first; coro; coro = coro->next)
1717 if (coro->hv) 3117 if (coro->hv)
… …
1722call (Coro::State coro, SV *coderef) 3122call (Coro::State coro, SV *coderef)
1723 ALIAS: 3123 ALIAS:
1724 eval = 1 3124 eval = 1
1725 CODE: 3125 CODE:
1726{ 3126{
1727 if (coro->mainstack) 3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1728 { 3128 {
1729 struct coro temp; 3129 struct coro *current = SvSTATE_current;
1730 3130
1731 if (!(coro->flags & CF_RUNNING)) 3131 if (current != coro)
1732 { 3132 {
1733 PUTBACK; 3133 PUTBACK;
1734 save_perl (aTHX_ &temp); 3134 save_perl (aTHX_ current);
1735 load_perl (aTHX_ coro); 3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
1736 } 3137 }
1737 3138
1738 {
1739 dSP;
1740 ENTER;
1741 SAVETMPS;
1742 PUTBACK;
1743 PUSHSTACK; 3139 PUSHSTACK;
3140
1744 PUSHMARK (SP); 3141 PUSHMARK (SP);
3142 PUTBACK;
1745 3143
1746 if (ix) 3144 if (ix)
1747 eval_sv (coderef, 0); 3145 eval_sv (coderef, 0);
1748 else 3146 else
1749 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1750 3148
1751 POPSTACK; 3149 POPSTACK;
1752 SPAGAIN; 3150 SPAGAIN;
1753 FREETMPS;
1754 LEAVE;
1755 PUTBACK;
1756 }
1757 3151
1758 if (!(coro->flags & CF_RUNNING)) 3152 if (current != coro)
1759 { 3153 {
3154 PUTBACK;
1760 save_perl (aTHX_ coro); 3155 save_perl (aTHX_ coro);
1761 load_perl (aTHX_ &temp); 3156 load_perl (aTHX_ current);
1762 SPAGAIN; 3157 SPAGAIN;
1763 } 3158 }
1764 } 3159 }
1765} 3160}
1766 3161
… …
1770 ALIAS: 3165 ALIAS:
1771 is_ready = CF_READY 3166 is_ready = CF_READY
1772 is_running = CF_RUNNING 3167 is_running = CF_RUNNING
1773 is_new = CF_NEW 3168 is_new = CF_NEW
1774 is_destroyed = CF_DESTROYED 3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
1775 CODE: 3171 CODE:
1776 RETVAL = boolSV (coro->flags & ix); 3172 RETVAL = boolSV (coro->flags & ix);
1777 OUTPUT: 3173 OUTPUT:
1778 RETVAL 3174 RETVAL
1779 3175
1780void 3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
3179 CODE:
3180{
3181 struct coro *current = SvSTATE_current;
3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
3183 SvREFCNT_dec (*throwp);
3184 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3185}
3186
3187void
1781api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3188api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3189 PROTOTYPE: $;$
3190 C_ARGS: aTHX_ coro, flags
1782 3191
1783SV * 3192SV *
1784has_stack (Coro::State coro) 3193has_cctx (Coro::State coro)
1785 PROTOTYPE: $ 3194 PROTOTYPE: $
1786 CODE: 3195 CODE:
1787 RETVAL = boolSV (!!coro->cctx); 3196 /* maybe manage the running flag differently */
3197 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1788 OUTPUT: 3198 OUTPUT:
1789 RETVAL 3199 RETVAL
1790 3200
1791int 3201int
1792is_traced (Coro::State coro) 3202is_traced (Coro::State coro)
… …
1794 CODE: 3204 CODE:
1795 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3205 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1796 OUTPUT: 3206 OUTPUT:
1797 RETVAL 3207 RETVAL
1798 3208
1799IV 3209UV
1800rss (Coro::State coro) 3210rss (Coro::State coro)
1801 PROTOTYPE: $ 3211 PROTOTYPE: $
1802 ALIAS: 3212 ALIAS:
1803 usecount = 1 3213 usecount = 1
1804 CODE: 3214 CODE:
… …
1810 OUTPUT: 3220 OUTPUT:
1811 RETVAL 3221 RETVAL
1812 3222
1813void 3223void
1814force_cctx () 3224force_cctx ()
3225 PROTOTYPE:
1815 CODE: 3226 CODE:
1816 struct coro *coro = SvSTATE (coro_current);
1817 coro->cctx->idle_sp = 0; 3227 cctx_current->idle_sp = 0;
3228
3229void
3230swap_defsv (Coro::State self)
3231 PROTOTYPE: $
3232 ALIAS:
3233 swap_defav = 1
3234 CODE:
3235 if (!self->slot)
3236 croak ("cannot swap state with coroutine that has no saved state,");
3237 else
3238 {
3239 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3240 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3241
3242 SV *tmp = *src; *src = *dst; *dst = tmp;
3243 }
3244
3245void
3246cancel (Coro::State self)
3247 CODE:
3248 coro_state_destroy (aTHX_ self);
3249 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3250
1818 3251
1819MODULE = Coro::State PACKAGE = Coro 3252MODULE = Coro::State PACKAGE = Coro
1820 3253
1821BOOT: 3254BOOT:
1822{ 3255{
1823 int i;
1824
1825 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3256 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1826 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3257 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3258 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3259 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3260 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1827 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3261 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3262 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3263 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3264 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1828 3265
1829 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3266 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1830 SvREADONLY_on (coro_current); 3267 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3268 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3269 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1831 3270
1832 coro_stash = gv_stashpv ("Coro", TRUE); 3271 coro_stash = gv_stashpv ("Coro", TRUE);
1833 3272
1834 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3273 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1835 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3274 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1836 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3275 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1837 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3276 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1838 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3277 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1839 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3278 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1840 3279
1841 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1842 coro_ready[i] = newAV ();
1843
1844 { 3280 {
1845 SV *sv = perl_get_sv ("Coro::API", TRUE); 3281 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1846 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1847 3282
1848 coroapi.schedule = api_schedule; 3283 coroapi.schedule = api_schedule;
3284 coroapi.schedule_to = api_schedule_to;
1849 coroapi.cede = api_cede; 3285 coroapi.cede = api_cede;
1850 coroapi.cede_notself = api_cede_notself; 3286 coroapi.cede_notself = api_cede_notself;
1851 coroapi.ready = api_ready; 3287 coroapi.ready = api_ready;
1852 coroapi.is_ready = api_is_ready; 3288 coroapi.is_ready = api_is_ready;
1853 coroapi.nready = &coro_nready; 3289 coroapi.nready = coro_nready;
1854 coroapi.current = coro_current; 3290 coroapi.current = coro_current;
1855 3291
1856 GCoroAPI = &coroapi; 3292 /*GCoroAPI = &coroapi;*/
1857 sv_setiv (sv, (IV)&coroapi); 3293 sv_setiv (sv, (IV)&coroapi);
1858 SvREADONLY_on (sv); 3294 SvREADONLY_on (sv);
1859 } 3295 }
1860} 3296}
3297
3298void
3299terminate (...)
3300 CODE:
3301 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3302
3303void
3304schedule (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3307
3308void
3309schedule_to (...)
3310 CODE:
3311 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3312
3313void
3314cede_to (...)
3315 CODE:
3316 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3317
3318void
3319cede (...)
3320 CODE:
3321 CORO_EXECUTE_SLF_XS (slf_init_cede);
3322
3323void
3324cede_notself (...)
3325 CODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1861 3327
1862void 3328void
1863_set_current (SV *current) 3329_set_current (SV *current)
1864 PROTOTYPE: $ 3330 PROTOTYPE: $
1865 CODE: 3331 CODE:
1866 SvREFCNT_dec (SvRV (coro_current)); 3332 SvREFCNT_dec (SvRV (coro_current));
1867 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3333 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3334
3335void
3336_set_readyhook (SV *hook)
3337 PROTOTYPE: $
3338 CODE:
3339 SvREFCNT_dec (coro_readyhook);
3340 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1868 3341
1869int 3342int
1870prio (Coro::State coro, int newprio = 0) 3343prio (Coro::State coro, int newprio = 0)
3344 PROTOTYPE: $;$
1871 ALIAS: 3345 ALIAS:
1872 nice = 1 3346 nice = 1
1873 CODE: 3347 CODE:
1874{ 3348{
1875 RETVAL = coro->prio; 3349 RETVAL = coro->prio;
… …
1890 3364
1891SV * 3365SV *
1892ready (SV *self) 3366ready (SV *self)
1893 PROTOTYPE: $ 3367 PROTOTYPE: $
1894 CODE: 3368 CODE:
1895 RETVAL = boolSV (api_ready (self)); 3369 RETVAL = boolSV (api_ready (aTHX_ self));
1896 OUTPUT: 3370 OUTPUT:
1897 RETVAL 3371 RETVAL
1898 3372
1899int 3373int
1900nready (...) 3374nready (...)
… …
1903 RETVAL = coro_nready; 3377 RETVAL = coro_nready;
1904 OUTPUT: 3378 OUTPUT:
1905 RETVAL 3379 RETVAL
1906 3380
1907void 3381void
1908throw (Coro::State self, SV *throw = &PL_sv_undef) 3382suspend (Coro::State self)
1909 PROTOTYPE: $;$ 3383 PROTOTYPE: $
3384 CODE:
3385 self->flags |= CF_SUSPENDED;
3386
3387void
3388resume (Coro::State self)
3389 PROTOTYPE: $
3390 CODE:
3391 self->flags &= ~CF_SUSPENDED;
3392
3393void
3394_pool_handler (...)
3395 CODE:
3396 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3397
3398void
3399async_pool (SV *cv, ...)
3400 PROTOTYPE: &@
3401 PPCODE:
3402{
3403 HV *hv = (HV *)av_pop (av_async_pool);
3404 AV *av = newAV ();
3405 SV *cb = ST (0);
3406 int i;
3407
3408 av_extend (av, items - 2);
3409 for (i = 1; i < items; ++i)
3410 av_push (av, SvREFCNT_inc_NN (ST (i)));
3411
3412 if ((SV *)hv == &PL_sv_undef)
3413 {
3414 PUSHMARK (SP);
3415 EXTEND (SP, 2);
3416 PUSHs (sv_Coro);
3417 PUSHs ((SV *)cv_pool_handler);
3418 PUTBACK;
3419 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3420 SPAGAIN;
3421
3422 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3423 }
3424
3425 {
3426 struct coro *coro = SvSTATE_hv (hv);
3427
3428 assert (!coro->invoke_cb);
3429 assert (!coro->invoke_av);
3430 coro->invoke_cb = SvREFCNT_inc (cb);
3431 coro->invoke_av = av;
3432 }
3433
3434 api_ready (aTHX_ (SV *)hv);
3435
3436 if (GIMME_V != G_VOID)
3437 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3438 else
3439 SvREFCNT_dec (hv);
3440}
3441
3442SV *
3443rouse_cb ()
3444 PROTOTYPE:
3445 CODE:
3446 RETVAL = coro_new_rouse_cb (aTHX);
3447 OUTPUT:
3448 RETVAL
3449
3450void
3451rouse_wait (...)
3452 PROTOTYPE: ;$
3453 PPCODE:
3454 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3455
3456void
3457on_enter (SV *block)
3458 ALIAS:
3459 on_leave = 1
3460 PROTOTYPE: &
3461 CODE:
3462{
3463 struct coro *coro = SvSTATE_current;
3464 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3465
3466 block = (SV *)coro_sv_2cv (aTHX_ block);
3467
3468 if (!*avp)
3469 *avp = newAV ();
3470
3471 av_push (*avp, SvREFCNT_inc (block));
3472
3473 if (!ix)
3474 on_enterleave_call (aTHX_ block);
3475
3476 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3477 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3478 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3479}
3480
3481
3482MODULE = Coro::State PACKAGE = PerlIO::cede
3483
3484BOOT:
3485 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3486
3487
3488MODULE = Coro::State PACKAGE = Coro::Semaphore
3489
3490SV *
3491new (SV *klass, SV *count = 0)
3492 CODE:
3493{
3494 int semcnt = 1;
3495
3496 if (count)
3497 {
3498 SvGETMAGIC (count);
3499
3500 if (SvOK (count))
3501 semcnt = SvIV (count);
3502 }
3503
3504 RETVAL = sv_bless (
3505 coro_waitarray_new (aTHX_ semcnt),
3506 GvSTASH (CvGV (cv))
3507 );
3508}
3509 OUTPUT:
3510 RETVAL
3511
3512# helper for Coro::Channel and others
3513SV *
3514_alloc (int count)
3515 CODE:
3516 RETVAL = coro_waitarray_new (aTHX_ count);
3517 OUTPUT:
3518 RETVAL
3519
3520SV *
3521count (SV *self)
3522 CODE:
3523 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3524 OUTPUT:
3525 RETVAL
3526
3527void
3528up (SV *self, int adjust = 1)
3529 ALIAS:
3530 adjust = 1
1910 CODE: 3531 CODE:
1911 SvREFCNT_dec (self->throw); 3532 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1912 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1913 3533
1914void 3534void
1915swap_defsv (Coro::State self) 3535down (...)
1916 PROTOTYPE: $
1917 ALIAS:
1918 swap_defav = 1
1919 CODE: 3536 CODE:
1920 if (!self->slot) 3537 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1921 croak ("cannot swap state with coroutine that has no saved state"); 3538
3539void
3540wait (...)
3541 CODE:
3542 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3543
3544void
3545try (SV *self)
3546 PPCODE:
3547{
3548 AV *av = (AV *)SvRV (self);
3549 SV *count_sv = AvARRAY (av)[0];
3550 IV count = SvIVX (count_sv);
3551
3552 if (count > 0)
3553 {
3554 --count;
3555 SvIVX (count_sv) = count;
3556 XSRETURN_YES;
3557 }
3558 else
3559 XSRETURN_NO;
3560}
3561
3562void
3563waiters (SV *self)
3564 PPCODE:
3565{
3566 AV *av = (AV *)SvRV (self);
3567 int wcount = AvFILLp (av) + 1 - 1;
3568
3569 if (GIMME_V == G_SCALAR)
3570 XPUSHs (sv_2mortal (newSViv (wcount)));
1922 else 3571 else
1923 { 3572 {
1924 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3573 int i;
1925 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3574 EXTEND (SP, wcount);
1926 3575 for (i = 1; i <= wcount; ++i)
1927 SV *tmp = *src; *src = *dst; *dst = tmp; 3576 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1928 } 3577 }
3578}
1929 3579
1930# for async_pool speedup 3580MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3581
1931void 3582void
1932_pool_1 (SV *cb) 3583_may_delete (SV *sem, int count, int extra_refs)
3584 PPCODE:
3585{
3586 AV *av = (AV *)SvRV (sem);
3587
3588 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3589 && AvFILLp (av) == 0 /* no waiters, just count */
3590 && SvIV (AvARRAY (av)[0]) == count)
3591 XSRETURN_YES;
3592
3593 XSRETURN_NO;
3594}
3595
3596MODULE = Coro::State PACKAGE = Coro::Signal
3597
3598SV *
3599new (SV *klass)
1933 CODE: 3600 CODE:
1934{ 3601 RETVAL = sv_bless (
1935 struct coro *coro = SvSTATE (coro_current); 3602 coro_waitarray_new (aTHX_ 0),
1936 HV *hv = (HV *)SvRV (coro_current); 3603 GvSTASH (CvGV (cv))
1937 AV *defav = GvAV (PL_defgv); 3604 );
1938 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3605 OUTPUT:
1939 AV *invoke_av; 3606 RETVAL
1940 int i, len;
1941
1942 if (!invoke)
1943 {
1944 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1945 croak ("\3async_pool terminate\2\n");
1946 }
1947
1948 SvREFCNT_dec (coro->saved_deffh);
1949 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1950
1951 hv_store (hv, "desc", sizeof ("desc") - 1,
1952 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1953
1954 invoke_av = (AV *)SvRV (invoke);
1955 len = av_len (invoke_av);
1956
1957 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1958
1959 if (len > 0)
1960 {
1961 av_fill (defav, len - 1);
1962 for (i = 0; i < len; ++i)
1963 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1964 }
1965
1966 SvREFCNT_dec (invoke);
1967}
1968 3607
1969void 3608void
1970_pool_2 (SV *cb) 3609wait (...)
3610 CODE:
3611 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3612
3613void
3614broadcast (SV *self)
3615 CODE:
3616{
3617 AV *av = (AV *)SvRV (self);
3618 coro_signal_wake (aTHX_ av, AvFILLp (av));
3619}
3620
3621void
3622send (SV *self)
3623 CODE:
3624{
3625 AV *av = (AV *)SvRV (self);
3626
3627 if (AvFILLp (av))
3628 coro_signal_wake (aTHX_ av, 1);
3629 else
3630 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3631}
3632
3633IV
3634awaited (SV *self)
1971 CODE: 3635 CODE:
1972{ 3636 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1973 struct coro *coro = SvSTATE (coro_current);
1974
1975 sv_setsv (cb, &PL_sv_undef);
1976
1977 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1978 coro->saved_deffh = 0;
1979
1980 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1981 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1982 {
1983 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1984 croak ("\3async_pool terminate\2\n");
1985 }
1986
1987 av_clear (GvAV (PL_defgv));
1988 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1989 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1990
1991 coro->prio = 0;
1992
1993 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1994 api_trace (coro_current, 0);
1995
1996 av_push (av_async_pool, newSVsv (coro_current));
1997}
1998
1999
2000MODULE = Coro::State PACKAGE = Coro::AIO
2001
2002SV *
2003_get_state ()
2004 CODE:
2005{
2006 struct io_state *data;
2007
2008 RETVAL = newSV (sizeof (struct io_state));
2009 data = (struct io_state *)SvPVX (RETVAL);
2010 SvCUR_set (RETVAL, sizeof (struct io_state));
2011 SvPOK_only (RETVAL);
2012
2013 data->errorno = errno;
2014 data->laststype = PL_laststype;
2015 data->laststatval = PL_laststatval;
2016 data->statcache = PL_statcache;
2017}
2018 OUTPUT: 3637 OUTPUT:
2019 RETVAL 3638 RETVAL
2020 3639
3640
3641MODULE = Coro::State PACKAGE = Coro::AnyEvent
3642
3643BOOT:
3644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3645
2021void 3646void
2022_set_state (char *data_) 3647_schedule (...)
2023 PROTOTYPE: $
2024 CODE: 3648 CODE:
2025{ 3649{
2026 struct io_state *data = (void *)data_; 3650 static int incede;
2027 3651
2028 errno = data->errorno; 3652 api_cede_notself (aTHX);
2029 PL_laststype = data->laststype;
2030 PL_laststatval = data->laststatval;
2031 PL_statcache = data->statcache;
2032}
2033 3653
3654 ++incede;
3655 while (coro_nready >= incede && api_cede (aTHX))
3656 ;
3657
3658 sv_setsv (sv_activity, &PL_sv_undef);
3659 if (coro_nready >= incede)
3660 {
3661 PUSHMARK (SP);
3662 PUTBACK;
3663 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3664 }
3665
3666 --incede;
3667}
3668
3669
3670MODULE = Coro::State PACKAGE = Coro::AIO
3671
3672void
3673_register (char *target, char *proto, SV *req)
3674 CODE:
3675{
3676 CV *req_cv = coro_sv_2cv (aTHX_ req);
3677 /* newXSproto doesn't return the CV on 5.8 */
3678 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3679 sv_setpv ((SV *)slf_cv, proto);
3680 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3681}
3682

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