ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC vs.
Revision 1.348 by root, Wed Jun 10 00:20:26 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>
… …
15 16
16#ifdef WIN32 17#ifdef WIN32
17# undef setjmp 18# undef setjmp
18# undef longjmp 19# undef longjmp
19# undef _exit 20# undef _exit
20# define setjmp _setjmp // deep magic, don't ask 21# define setjmp _setjmp /* deep magic */
21#else 22#else
22# include <inttypes.h> /* most portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
23#endif 24#endif
24 25
25#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
… …
45# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
46#endif 47#endif
47 48
48#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif 51#endif
54 52
55/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
57 55
58#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63 61
64#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr 63# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
67# endif 65# endif
… …
80# ifndef IS_PADCONST 78# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
82# endif 80# endif
83#endif 81#endif
84 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
85/* 5.8.8 */ 93/* 5.8.8 */
86#ifndef GV_NOTQUAL 94#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0 95# define GV_NOTQUAL 0
88#endif 96#endif
89#ifndef newSV 97#ifndef newSV
90# define newSV(l) NEWSV(0,l) 98# define newSV(l) NEWSV(0,l)
91#endif 99#endif
92 100#ifndef CvISXSUB_on
93/* 5.11 */ 101# define CvISXSUB_on(cv) (void)cv
94#ifndef CxHASARGS 102#endif
95# 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)
96#endif 108#endif
97 109
98/* 5.8.7 */ 110/* 5.8.7 */
99#ifndef SvRV_set 111#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
… …
113# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif 126#endif
115 127
116/* 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
117 * 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
118#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
119#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
120 137
121#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
122 139
123#if __GNUC__ >= 3 140#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
127#else 144#else
128# define attribute(x) 145# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
131#endif 148#endif
132 149
133#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
135 152
136#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
137 154
138#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
139 157
140#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
141static perl_mutex coro_mutex; 159# if CORO_PTHREAD
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif 161# endif
162#endif
148 163
149/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157 165
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;
158static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
159static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env; 174static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
163static 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 */
164 181
165static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook; 184static SV *rv_diehook;
168static SV *rv_warnhook; 185static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
170 187
171/* async_pool helper stuff */ 188/* async_pool helper stuff */
172static SV *sv_pool_rss; 189static SV *sv_pool_rss;
173static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
174static 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;
175 199
176static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
178 202
179enum { 203enum {
… …
184 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186}; 210};
187 211
188/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx { 213typedef struct coro_cctx
214{
190 struct coro_cctx *next; 215 struct coro_cctx *next;
191 216
192 /* the stack */ 217 /* the stack */
193 void *sptr; 218 void *sptr;
194 size_t ssize; 219 size_t ssize;
… …
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 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 */
199 JMPENV *top_env; 224 JMPENV *top_env;
200 coro_context cctx; 225 coro_context cctx;
201 226
227 U32 gen;
202#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
203 int valgrind_id; 229 int valgrind_id;
204#endif 230#endif
205 unsigned char flags; 231 unsigned char flags;
206} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
207 237
208enum { 238enum {
209 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
210 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
211 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
212 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 */
213}; 244};
214 245
215/* 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 */
216typedef struct { 247typedef struct
248{
217 SV *defsv; 249 SV *defsv;
218 AV *defav; 250 AV *defav;
219 SV *errsv; 251 SV *errsv;
220 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
221#define VAR(name,type) type name; 254#define VAR(name,type) type name;
222# include "state.h" 255# include "state.h"
223#undef VAR 256#undef VAR
224} perl_slots; 257} perl_slots;
225 258
226#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))
227 260
228/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
229struct coro { 262struct coro {
230 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
231 coro_cctx *cctx; 264 coro_cctx *cctx;
232 265
233 /* process data */ 266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
234 AV *mainstack; 271 AV *mainstack;
235 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
236 273
274 CV *startcv; /* the CV to execute */
237 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
238 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
240 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);
241 280
242 /* statistics */ 281 /* statistics */
243 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
244 283
245 /* coro process data */ 284 /* coro process data */
246 int prio; 285 int prio;
247 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
248 288
249 /* async_pool */ 289 /* async_pool */
250 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;
251 297
252 /* linked list */ 298 /* linked list */
253 struct coro *next, *prev; 299 struct coro *next, *prev;
254}; 300};
255 301
256typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
257typedef 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 */
258 309
259/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
260 311
261#define PRIO_MAX 3 312#define PRIO_MAX 3
262#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
265#define PRIO_IDLE -3 316#define PRIO_IDLE -3
266#define PRIO_MIN -4 317#define PRIO_MIN -4
267 318
268/* for Coro.pm */ 319/* for Coro.pm */
269static SV *coro_current; 320static SV *coro_current;
270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
271static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
272static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
273 326
274/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
275 328
276static SV * 329static SV *
277coro_get_sv (pTHX_ const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
… …
301 get_hv (name, create); 354 get_hv (name, create);
302#endif 355#endif
303 return get_hv (name, create); 356 return get_hv (name, create);
304} 357}
305 358
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
306static AV * 425static AV *
307coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
308{ 427{
309 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
310 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
311 430
312 newpadlist = newAV (); 431 newpadlist = newAV ();
… …
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif 437#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist); 439 --AvFILLp (padlist);
321 440
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
323 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
324 443
325 return newpadlist; 444 return newpadlist;
326} 445}
327 446
328static void 447static void
329free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
330{ 449{
331 /* may be during global destruction */ 450 /* may be during global destruction */
332 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
333 { 452 {
334 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
335 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
336 { 456 {
337 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
338 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
339 { 459 I32 j = AvFILLp (av);
340 SV *sv; 460
341 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
342 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
343
344 SvREFCNT_dec (*svp);
345 }
346 } 466 }
347 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
348 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
349 } 472 }
350} 473}
351 474
352static int 475static int
… …
357 480
358 /* casting is fun. */ 481 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
361 484
485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
486
362 return 0; 487 return 0;
363} 488}
364
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext
366#define CORO_MAGIC_type_state PERL_MAGIC_ext
367 489
368static MGVTBL coro_cv_vtbl = { 490static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0, 491 0, 0, 0, 0,
370 coro_cv_free 492 coro_cv_free
371}; 493};
372
373#define CORO_MAGIC(sv,type) \
374 SvMAGIC (sv) \
375 ? SvMAGIC (sv)->mg_type == type \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0
379
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
382
383static struct coro *
384SvSTATE_ (pTHX_ SV *coro)
385{
386 HV *stash;
387 MAGIC *mg;
388
389 if (SvROK (coro))
390 coro = SvRV (coro);
391
392 if (expect_false (SvTYPE (coro) != SVt_PVHV))
393 croak ("Coro::State object required");
394
395 stash = SvSTASH (coro);
396 if (expect_false (stash != coro_stash && stash != coro_state_stash))
397 {
398 /* very slow, but rare, check */
399 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
400 croak ("Coro::State object required");
401 }
402
403 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr;
405}
406
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
408 494
409/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
410static void 496static void
411get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
412{ 498{
… …
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else 504 else
419 { 505 {
420#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
422 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
423 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
426#else 513#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
428#endif 515#endif
429 } 516 }
430} 517}
431 518
432static void 519static void
… …
439 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);
440 527
441 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
442 529
443 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
444 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
445 532
446 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
447} 534}
448 535
449/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
450 540
451static void 541static void
452load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
453{ 543{
454 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
455 c->slot = 0; 545 c->slot = 0;
456 546
457 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
458 548
459 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
460 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
461 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
462 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
463 554
464 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
465 # include "state.h" 556 # include "state.h"
466 #undef VAR 557 #undef VAR
467 558
… …
478 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
479 } 570 }
480 571
481 PUTBACK; 572 PUTBACK;
482 } 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 }
483} 585}
484 586
485static void 587static void
486save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
487{ 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
488 { 601 {
489 dSP; 602 dSP;
490 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
510 623
511 if (expect_true (CvDEPTH (cv))) 624 if (expect_true (CvDEPTH (cv)))
512 { 625 {
513 EXTEND (SP, 3); 626 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
516 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
517 630
518 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
520 } 633 }
… …
547 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
548 661
549 { 662 {
550 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
551 664
552 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
553 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
554 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
555 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
556 670
557 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
558 # include "state.h" 672 # include "state.h"
559 #undef VAR 673 #undef VAR
560 } 674 }
561} 675}
562 676
563/* 677/*
564 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
565 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
568 */ 682 */
569#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
571#else 685#else
572static void 686static void
573coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
574{ 688{
575 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
612 726
613/* 727/*
614 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
615 */ 729 */
616static void 730static void
617coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
618{ 732{
619 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
621 735
622 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
638#if !PERL_VERSION_ATLEAST (5,10,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack); 753 Safefree (PL_retstack);
640#endif 754#endif
641} 755}
642 756
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
643static size_t 766static size_t
644coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
645{ 768{
646 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
647 770
648 if (coro->mainstack) 771 if (coro->mainstack)
649 { 772 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
654 { 774 {
655 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
656 776 CORO_RSS;
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR 777 #undef SYM
660 } 778 }
661 else 779 else
662 slot = coro->slot; 780 {
663 781 #define SYM(sym) coro->slot->sym
664 rss += sizeof (slot->curstackinfo); 782 CORO_RSS;
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 783 #undef SYM
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 784 }
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 } 785 }
676 786
677 return rss; 787 return rss;
678} 788}
679 789
680/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
681 791
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static 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
684 802
685/* 803/*
686 * This overrides the default magic get method of %SIG elements. 804 * This overrides the default magic get method of %SIG elements.
687 * 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
688 * 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
689 * readback here. 807 * readback here.
690 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
691 * not expecting this to actually change the hook. This is a potential problem
692 * when a schedule happens then, but we ignore this.
693 */ 808 */
694static int 809static int
695coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
696{ 811{
697 const char *s = MgPV_nolen_const (mg); 812 const char *s = MgPV_nolen_const (mg);
698 813
699 if (*s == '_') 814 if (*s == '_')
700 { 815 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 816 SV **svp = 0;
702 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 }
703 } 826 }
704 827
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0; 828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
706} 829}
707 830
708static int 831static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg) 832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
710{ 833{
711 const char *s = MgPV_nolen_const (mg); 834 const char *s = MgPV_nolen_const (mg);
712 835
713 if (*s == '_') 836 if (*s == '_')
714 { 837 {
… …
718 if (strEQ (s, "__WARN__")) svp = &PL_warnhook; 841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
719 842
720 if (svp) 843 if (svp)
721 { 844 {
722 SV *old = *svp; 845 SV *old = *svp;
723 *svp = newSVsv (sv); 846 *svp = 0;
724 SvREFCNT_dec (old); 847 SvREFCNT_dec (old);
725 return 0; 848 return 0;
726 } 849 }
727 } 850 }
728 851
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
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0; 876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730} 877}
731 878
732static 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 */
733coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
734{ 902{
735 /* 903 /*
736 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
737 */ 905 */
… …
739 907
740 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
741 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
742 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
743 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
744 PL_curpm = 0; 915 PL_curpm = 0;
745 PL_curpad = 0; 916 PL_curpad = 0;
746 PL_localizing = 0; 917 PL_localizing = 0;
747 PL_dirty = 0; 918 PL_dirty = 0;
748 PL_restartop = 0; 919 PL_restartop = 0;
749#if PERL_VERSION_ATLEAST (5,10,0) 920#if PERL_VERSION_ATLEAST (5,10,0)
750 PL_parser = 0; 921 PL_parser = 0;
751#endif 922#endif
923 PL_hints = 0;
752 924
753 /* recreate the die/warn hooks */ 925 /* recreate the die/warn hooks */
754 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 );
755 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);
756 928
757 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
760 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;
761 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
763 936
764 { 937 {
765 dSP; 938 dSP;
766 LOGOP myop; 939 UNOP myop;
767 940
768 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
769 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
770 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
771 945
772 PUSHMARK (SP); 946 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
774 PUTBACK; 948 PUTBACK;
775 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 } 951 }
779 952
780 /* 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
781 * 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.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */ 955 */
785 ENTER; 956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
786} 957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
787 958
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
788static void 971static void
789coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
790{ 973{
791 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
792 { 975 {
793 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
802 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
803 986
804 /* unwind main stack */ 987 /* unwind main stack */
805 dounwind (-1); 988 dounwind (-1);
806 } 989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
807 996
808 SvREFCNT_dec (GvSV (PL_defgv)); 997 SvREFCNT_dec (GvSV (PL_defgv));
809 SvREFCNT_dec (GvAV (PL_defgv)); 998 SvREFCNT_dec (GvAV (PL_defgv));
810 SvREFCNT_dec (GvSV (PL_errgv)); 999 SvREFCNT_dec (GvSV (PL_errgv));
811 SvREFCNT_dec (PL_defoutgv); 1000 SvREFCNT_dec (PL_defoutgv);
812 SvREFCNT_dec (PL_rs); 1001 SvREFCNT_dec (PL_rs);
813 SvREFCNT_dec (GvSV (irsgv)); 1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
814 1004
815 SvREFCNT_dec (PL_diehook); 1005 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook); 1006 SvREFCNT_dec (PL_warnhook);
817 1007
818 SvREFCNT_dec (coro->saved_deffh); 1008 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw); 1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
820 1012
821 coro_destroy_stacks (aTHX); 1013 coro_destruct_stacks (aTHX);
822} 1014}
823 1015
824static void 1016INLINE void
825free_coro_mortal (pTHX) 1017free_coro_mortal (pTHX)
826{ 1018{
827 if (expect_true (coro_mortal)) 1019 if (expect_true (coro_mortal))
828 { 1020 {
829 SvREFCNT_dec (coro_mortal); 1021 SvREFCNT_dec (coro_mortal);
… …
834static int 1026static int
835runops_trace (pTHX) 1027runops_trace (pTHX)
836{ 1028{
837 COP *oldcop = 0; 1029 COP *oldcop = 0;
838 int oldcxix = -2; 1030 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx;
841 1031
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 { 1033 {
844 PERL_ASYNC_CHECK (); 1034 PERL_ASYNC_CHECK ();
845 1035
846 if (cctx->flags & CC_TRACE_ALL) 1036 if (cctx_current->flags & CC_TRACE_ALL)
847 { 1037 {
848 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
849 { 1039 {
850 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
851 SV **bot, **top; 1041 SV **bot, **top;
852 AV *av = newAV (); /* return values */ 1042 AV *av = newAV (); /* return values */
853 SV **cb; 1043 SV **cb;
… …
863 : cx->blk_gimme == G_SCALAR ? bot + 1 1053 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot; 1054 : bot;
865 1055
866 av_extend (av, top - bot); 1056 av_extend (av, top - bot);
867 while (bot < top) 1057 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++)); 1058 av_push (av, SvREFCNT_inc_NN (*bot++));
869 1059
870 PL_runops = RUNOPS_DEFAULT; 1060 PL_runops = RUNOPS_DEFAULT;
871 ENTER; 1061 ENTER;
872 SAVETMPS; 1062 SAVETMPS;
873 EXTEND (SP, 3); 1063 EXTEND (SP, 3);
… …
890 1080
891 if (PL_curcop != &PL_compiling) 1081 if (PL_curcop != &PL_compiling)
892 { 1082 {
893 SV **cb; 1083 SV **cb;
894 1084
895 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
896 { 1086 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 1088
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 { 1090 {
901 runops_proc_t old_runops = PL_runops;
902 dSP; 1091 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv); 1092 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0)); 1093 SV *fullname = sv_2mortal (newSV (0));
905 1094
906 if (isGV (gv)) 1095 if (isGV (gv))
… …
911 SAVETMPS; 1100 SAVETMPS;
912 EXTEND (SP, 3); 1101 EXTEND (SP, 3);
913 PUSHMARK (SP); 1102 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes); 1103 PUSHs (&PL_sv_yes);
915 PUSHs (fullname); 1104 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK; 1106 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN; 1109 SPAGAIN;
921 FREETMPS; 1110 FREETMPS;
… …
924 } 1113 }
925 1114
926 oldcxix = cxstack_ix; 1115 oldcxix = cxstack_ix;
927 } 1116 }
928 1117
929 if (cctx->flags & CC_TRACE_LINE) 1118 if (cctx_current->flags & CC_TRACE_LINE)
930 { 1119 {
931 dSP; 1120 dSP;
932 1121
933 PL_runops = RUNOPS_DEFAULT; 1122 PL_runops = RUNOPS_DEFAULT;
934 ENTER; 1123 ENTER;
… …
953 1142
954 TAINT_NOT; 1143 TAINT_NOT;
955 return 0; 1144 return 0;
956} 1145}
957 1146
958/* inject a fake call to Coro::State::_cctx_init into the execution */ 1147static struct CoroSLF cctx_ssl_frame;
959/* _cctx_init should be careful, as it could be called at almost any time */ 1148
960/* during execution of a perl program */ 1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
961static void NOINLINE 1164static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx) 1165cctx_prepare (pTHX)
963{ 1166{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env; 1167 PL_top_env = &PL_start_env;
968 1168
969 if (cctx->flags & CC_TRACE) 1169 if (cctx_current->flags & CC_TRACE)
970 PL_runops = runops_trace; 1170 PL_runops = runops_trace;
971 1171
972 Zero (&myop, 1, LOGOP); 1172 /* we already must be executing an SLF op, there is no other valid way
973 myop.op_next = PL_op; 1173 * that can lead to creation of a new cctx */
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
975 1176
976 PUSHMARK (SP); 1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
977 EXTEND (SP, 2); 1178 cctx_ssl_frame = slf_frame;
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1179
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1180 slf_frame.prepare = slf_prepare_set_stacklevel;
980 PUTBACK; 1181 slf_frame.check = slf_check_set_stacklevel;
981 PL_op = (OP *)&myop; 1182}
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1183
983 SPAGAIN; 1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
984} 1189}
985 1190
986/* 1191/*
987 * this is a _very_ stripped down perl interpreter ;) 1192 * this is a _very_ stripped down perl interpreter ;)
988 */ 1193 */
989static void 1194static void
990cctx_run (void *arg) 1195cctx_run (void *arg)
991{ 1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
992 dTHX; 1203 dTHX;
993 1204
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1205 /* normally we would need to skip the entersub here */
995 UNLOCK; 1206 /* not doing so will re-execute it, which is exactly what we want */
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next; 1207 /* PL_nop = PL_nop->op_next */
999 1208
1000 /* inject a fake subroutine call to cctx_init */ 1209 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg); 1210 cctx_prepare (aTHX);
1002 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
1003 /* somebody or something will hit me for both perl_run and PL_restartop */ 1215 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op; 1216 PL_restartop = PL_op;
1005 perl_run (PL_curinterp); 1217 perl_run (PL_curinterp);
1006
1007 /* 1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
1008 * If perl-run returns we assume exit() was being called or the coro 1224 * If perl-run returns we assume exit() was being called or the coro
1009 * fell off the end, which seems to be the only valid (non-bug) 1225 * fell off the end, which seems to be the only valid (non-bug)
1010 * reason for perl_run to return. We try to exit by jumping to the 1226 * reason for perl_run to return. We try to exit by jumping to the
1011 * bootstrap-time "top" top_env, as we cannot restore the "main" 1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept 1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
1013 */ 1231 */
1014 PL_top_env = main_top_env; 1232 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
1016} 1235}
1017 1236
1018static coro_cctx * 1237static coro_cctx *
1019cctx_new () 1238cctx_new ()
1020{ 1239{
1021 coro_cctx *cctx; 1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
1022 void *stack_start; 1269 void *stack_start;
1023 size_t stack_size; 1270 size_t stack_size;
1024 1271
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP 1272#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */ 1274 /* mmap supposedly does allocate-on-write for us */
1032 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033 1276
1034 if (cctx->sptr != (void *)-1) 1277 if (cctx->sptr != (void *)-1)
1035 { 1278 {
1036# if CORO_STACKGUARD 1279 #if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif 1281 #endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED; 1284 cctx->flags |= CC_MAPPED;
1042 } 1285 }
1043 else 1286 else
1044#endif 1287#endif
1045 { 1288 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long); 1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long); 1290 New (0, cctx->sptr, cctx_stacksize, long);
1048 1291
1049 if (!cctx->sptr) 1292 if (!cctx->sptr)
1050 { 1293 {
1051 perror ("FATAL: unable to allocate stack for coroutine"); 1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1052 _exit (EXIT_FAILURE); 1295 _exit (EXIT_FAILURE);
1053 } 1296 }
1054 1297
1055 stack_start = cctx->sptr; 1298 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize; 1299 stack_size = cctx->ssize;
1057 } 1300 }
1058 1301
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061 1307
1062 return cctx; 1308 return cctx;
1063} 1309}
1064 1310
… …
1066cctx_destroy (coro_cctx *cctx) 1312cctx_destroy (coro_cctx *cctx)
1067{ 1313{
1068 if (!cctx) 1314 if (!cctx)
1069 return; 1315 return;
1070 1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1071 --cctx_count; 1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1072 1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1073#if CORO_USE_VALGRIND 1325 #if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif 1327 #endif
1076 1328
1077#if HAVE_MMAP 1329#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED) 1330 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize); 1331 munmap (cctx->sptr, cctx->ssize);
1080 else 1332 else
1081#endif 1333#endif
1082 Safefree (cctx->sptr); 1334 Safefree (cctx->sptr);
1335 }
1083 1336
1084 Safefree (cctx); 1337 Safefree (cctx);
1085} 1338}
1086 1339
1087/* wether this cctx should be destructed */ 1340/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1089 1342
1090static coro_cctx * 1343static coro_cctx *
1091cctx_get (pTHX) 1344cctx_get (pTHX)
1092{ 1345{
1093 while (expect_true (cctx_first)) 1346 while (expect_true (cctx_first))
… …
1100 return cctx; 1353 return cctx;
1101 1354
1102 cctx_destroy (cctx); 1355 cctx_destroy (cctx);
1103 } 1356 }
1104 1357
1105 return cctx_new (); 1358 return cctx_new_run ();
1106} 1359}
1107 1360
1108static void 1361static void
1109cctx_put (coro_cctx *cctx) 1362cctx_put (coro_cctx *cctx)
1110{ 1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1111 /* free another cctx if overlimit */ 1366 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1367 if (expect_false (cctx_idle >= cctx_max_idle))
1113 { 1368 {
1114 coro_cctx *first = cctx_first; 1369 coro_cctx *first = cctx_first;
1115 cctx_first = first->next; 1370 cctx_first = first->next;
1116 --cctx_idle; 1371 --cctx_idle;
1117 1372
… …
1126/** coroutine switching *****************************************************/ 1381/** coroutine switching *****************************************************/
1127 1382
1128static void 1383static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next) 1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{ 1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1131 if (expect_true (prev != next)) 1388 if (expect_true (prev != next))
1132 { 1389 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1135 1392
1136 if (expect_false (next->flags & CF_RUNNING))
1137 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1138
1139 if (expect_false (next->flags & CF_DESTROYED)) 1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1140 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1141 1395
1142#if !PERL_VERSION_ATLEAST (5,10,0) 1396#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING)) 1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version"); 1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1145#endif 1399#endif
1146 } 1400 }
1147} 1401}
1148 1402
1149/* always use the TRANSFER macro */ 1403/* always use the TRANSFER macro */
1150static void NOINLINE 1404static void NOINLINE /* noinline so we have a fixed stackframe */
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx) 1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{ 1406{
1153 dSTACKLEVEL; 1407 dSTACKLEVEL;
1154 static volatile int has_throw;
1155 1408
1156 /* sometimes transfer is only called to set idle_sp */ 1409 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next)) 1410 if (expect_false (!prev))
1158 { 1411 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1412 cctx_current->idle_sp = STACKLEVEL;
1160 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161 } 1414 }
1162 else if (expect_true (prev != next)) 1415 else if (expect_true (prev != next))
1163 { 1416 {
1164 coro_cctx *prev__cctx; 1417 coro_cctx *cctx_prev;
1165 1418
1166 if (expect_false (prev->flags & CF_NEW)) 1419 if (expect_false (prev->flags & CF_NEW))
1167 { 1420 {
1168 /* create a new empty context */ 1421 /* create a new empty/source context */
1169 Newz (0, prev->cctx, 1, coro_cctx);
1170 prev->flags &= ~CF_NEW; 1422 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING; 1423 prev->flags |= CF_RUNNING;
1172 } 1424 }
1173 1425
1174 prev->flags &= ~CF_RUNNING; 1426 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING; 1427 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178 1428
1179 /* first get rid of the old state */ 1429 /* first get rid of the old state */
1180 save_perl (aTHX_ prev); 1430 save_perl (aTHX_ prev);
1181 1431
1182 if (expect_false (next->flags & CF_NEW)) 1432 if (expect_false (next->flags & CF_NEW))
… …
1187 coro_setup (aTHX_ next); 1437 coro_setup (aTHX_ next);
1188 } 1438 }
1189 else 1439 else
1190 load_perl (aTHX_ next); 1440 load_perl (aTHX_ next);
1191 1441
1192 prev__cctx = prev->cctx;
1193
1194 /* possibly "free" the cctx */ 1442 /* possibly untie and reuse the cctx */
1195 if (expect_true ( 1443 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL 1444 cctx_current->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE) 1445 && !(cctx_current->flags & CC_TRACE)
1198 && !force_cctx 1446 && !force_cctx
1199 )) 1447 ))
1200 { 1448 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1202 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1203 1451
1204 prev->cctx = 0;
1205
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1207 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1208 if (expect_false (CCTX_EXPIRED (prev__cctx))) 1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1209 if (!next->cctx) 1455 if (expect_true (!next->cctx))
1210 next->cctx = cctx_get (aTHX); 1456 next->cctx = cctx_get (aTHX);
1211 1457
1212 cctx_put (prev__cctx); 1458 cctx_put (cctx_current);
1213 } 1459 }
1460 else
1461 prev->cctx = cctx_current;
1214 1462
1215 ++next->usecount; 1463 ++next->usecount;
1216 1464
1217 if (expect_true (!next->cctx)) 1465 cctx_prev = cctx_current;
1218 next->cctx = cctx_get (aTHX); 1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1219 1467
1220 has_throw = !!next->throw; 1468 next->cctx = 0;
1221 1469
1222 if (expect_false (prev__cctx != next->cctx)) 1470 if (expect_false (cctx_prev != cctx_current))
1223 { 1471 {
1224 prev__cctx->top_env = PL_top_env; 1472 cctx_prev->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env; 1473 PL_top_env = cctx_current->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1227 } 1475 }
1228 1476
1229 free_coro_mortal (aTHX); 1477 transfer_tail (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 } 1478 }
1245} 1479}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251 1480
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx)) 1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254 1483
1255/** high level stuff ********************************************************/ 1484/** high level stuff ********************************************************/
… …
1257static int 1486static int
1258coro_state_destroy (pTHX_ struct coro *coro) 1487coro_state_destroy (pTHX_ struct coro *coro)
1259{ 1488{
1260 if (coro->flags & CF_DESTROYED) 1489 if (coro->flags & CF_DESTROYED)
1261 return 0; 1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1262 1494
1263 coro->flags |= CF_DESTROYED; 1495 coro->flags |= CF_DESTROYED;
1264 1496
1265 if (coro->flags & CF_READY) 1497 if (coro->flags & CF_READY)
1266 { 1498 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */ 1500 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready; 1501 --coro_nready;
1271 UNLOCK;
1272 } 1502 }
1273 else 1503 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275 1505
1276 if (coro->mainstack && coro->mainstack != main_mainstack) 1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1277 { 1510 {
1278 struct coro temp; 1511 struct coro *current = SvSTATE_current;
1279 1512
1280 if (coro->flags & CF_RUNNING) 1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282 1514
1283 save_perl (aTHX_ &temp); 1515 save_perl (aTHX_ current);
1284 load_perl (aTHX_ coro); 1516 load_perl (aTHX_ coro);
1285 1517
1286 coro_destroy (aTHX_ coro); 1518 coro_destruct_perl (aTHX_ coro);
1287 1519
1288 load_perl (aTHX_ &temp); 1520 load_perl (aTHX_ current);
1289 1521
1290 coro->slot = 0; 1522 coro->slot = 0;
1291 } 1523 }
1292 1524
1293 cctx_destroy (coro->cctx); 1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1294 SvREFCNT_dec (coro->args); 1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1295 1529
1296 if (coro->next) coro->next->prev = coro->prev; 1530 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next; 1531 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next; 1532 if (coro == coro_first) coro_first = coro->next;
1299 1533
… …
1337# define MGf_DUP 0 1571# define MGf_DUP 0
1338#endif 1572#endif
1339}; 1573};
1340 1574
1341static void 1575static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{ 1577{
1344 ta->prev = SvSTATE (prev_sv); 1578 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta); 1580 TRANSFER_CHECK (*ta);
1347} 1581}
1348 1582
1349static void 1583static void
1350api_transfer (SV *prev_sv, SV *next_sv) 1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1351{ 1585{
1352 dTHX;
1353 struct transfer_args ta; 1586 struct coro_transfer_args ta;
1354 1587
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1); 1589 TRANSFER (ta, 1);
1357} 1590}
1358 1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1359/** Coro ********************************************************************/ 1615/** Coro ********************************************************************/
1360 1616
1361static void 1617INLINE void
1362coro_enq (pTHX_ SV *coro_sv) 1618coro_enq (pTHX_ struct coro *coro)
1363{ 1619{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1365}
1366 1621
1367static SV * 1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1368coro_deq (pTHX) 1630coro_deq (pTHX)
1369{ 1631{
1370 int prio; 1632 int prio;
1371 1633
1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; ) 1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1373 if (AvFILLp (coro_ready [prio]) >= 0) 1635 {
1374 return av_shift (coro_ready [prio]); 1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1375 1645
1376 return 0; 1646 return 0;
1377} 1647}
1378 1648
1379static int 1649static int
1380api_ready (SV *coro_sv) 1650api_ready (pTHX_ SV *coro_sv)
1381{ 1651{
1382 dTHX;
1383 struct coro *coro; 1652 struct coro *coro;
1384 1653 SV *sv_hook;
1385 if (SvROK (coro_sv)) 1654 void (*xs_hook)(void);
1386 coro_sv = SvRV (coro_sv);
1387 1655
1388 coro = SvSTATE (coro_sv); 1656 coro = SvSTATE (coro_sv);
1389 1657
1390 if (coro->flags & CF_READY) 1658 if (coro->flags & CF_READY)
1391 return 0; 1659 return 0;
1392 1660
1393 coro->flags |= CF_READY; 1661 coro->flags |= CF_READY;
1394 1662
1395 LOCK; 1663 sv_hook = coro_nready ? 0 : coro_readyhook;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1664 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1665
1666 coro_enq (aTHX_ coro);
1397 ++coro_nready; 1667 ++coro_nready;
1398 UNLOCK; 1668
1669 if (sv_hook)
1670 {
1671 dSP;
1672
1673 ENTER;
1674 SAVETMPS;
1675
1676 PUSHMARK (SP);
1677 PUTBACK;
1678 call_sv (sv_hook, G_VOID | G_DISCARD);
1679
1680 FREETMPS;
1681 LEAVE;
1682 }
1683
1684 if (xs_hook)
1685 xs_hook ();
1399 1686
1400 return 1; 1687 return 1;
1401} 1688}
1402 1689
1403static int 1690static int
1404api_is_ready (SV *coro_sv) 1691api_is_ready (pTHX_ SV *coro_sv)
1405{ 1692{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1693 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408} 1694}
1409 1695
1410static void 1696/* expects to own a reference to next->hv */
1697INLINE void
1411prepare_schedule (pTHX_ struct transfer_args *ta) 1698prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1412{ 1699{
1413 SV *prev_sv, *next_sv;
1414
1415 for (;;)
1416 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX);
1419
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv))
1422 {
1423 dSP;
1424 UNLOCK;
1425
1426 ENTER;
1427 SAVETMPS;
1428
1429 PUSHMARK (SP);
1430 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1432 SPAGAIN;
1433
1434 FREETMPS;
1435 LEAVE;
1436 continue;
1437 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current); 1700 SV *prev_sv = SvRV (coro_current);
1701
1457 ta->prev = SvSTATE (prev_sv); 1702 ta->prev = SvSTATE_hv (prev_sv);
1703 ta->next = next;
1704
1458 TRANSFER_CHECK (*ta); 1705 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY); 1706
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv); 1707 SvRV_set (coro_current, (SV *)next->hv);
1462 1708
1463 LOCK;
1464 free_coro_mortal (aTHX); 1709 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv; 1710 coro_mortal = prev_sv;
1466 UNLOCK;
1467} 1711}
1468 1712
1469static void 1713static void
1714prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1715{
1716 for (;;)
1717 {
1718 struct coro *next = coro_deq (aTHX);
1719
1720 if (expect_true (next))
1721 {
1722 /* cannot transfer to destroyed coros, skip and look for next */
1723 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1724 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1725 else
1726 {
1727 next->flags &= ~CF_READY;
1728 --coro_nready;
1729
1730 prepare_schedule_to (aTHX_ ta, next);
1731 break;
1732 }
1733 }
1734 else
1735 {
1736 /* nothing to schedule: call the idle handler */
1737 if (SvROK (sv_idle)
1738 && SvOBJECT (SvRV (sv_idle)))
1739 {
1740 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1741 api_ready (aTHX_ SvRV (sv_idle));
1742 --coro_nready;
1743 }
1744 else
1745 {
1746 dSP;
1747
1748 ENTER;
1749 SAVETMPS;
1750
1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (sv_idle, G_VOID | G_DISCARD);
1754
1755 FREETMPS;
1756 LEAVE;
1757 }
1758 }
1759 }
1760}
1761
1762INLINE void
1470prepare_cede (pTHX_ struct transfer_args *ta) 1763prepare_cede (pTHX_ struct coro_transfer_args *ta)
1471{ 1764{
1472 api_ready (coro_current); 1765 api_ready (aTHX_ coro_current);
1473 prepare_schedule (aTHX_ ta); 1766 prepare_schedule (aTHX_ ta);
1474} 1767}
1475 1768
1769INLINE void
1770prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1771{
1772 SV *prev = SvRV (coro_current);
1773
1774 if (coro_nready)
1775 {
1776 prepare_schedule (aTHX_ ta);
1777 api_ready (aTHX_ prev);
1778 }
1779 else
1780 prepare_nop (aTHX_ ta);
1781}
1782
1783static void
1784api_schedule (pTHX)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_schedule (aTHX_ &ta);
1789 TRANSFER (ta, 1);
1790}
1791
1792static void
1793api_schedule_to (pTHX_ SV *coro_sv)
1794{
1795 struct coro_transfer_args ta;
1796 struct coro *next = SvSTATE (coro_sv);
1797
1798 SvREFCNT_inc_NN (coro_sv);
1799 prepare_schedule_to (aTHX_ &ta, next);
1800}
1801
1476static int 1802static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta) 1803api_cede (pTHX)
1478{ 1804{
1479 if (coro_nready) 1805 struct coro_transfer_args ta;
1480 { 1806
1481 SV *prev = SvRV (coro_current);
1482 prepare_schedule (aTHX_ ta); 1807 prepare_cede (aTHX_ &ta);
1483 api_ready (prev); 1808
1809 if (expect_true (ta.prev != ta.next))
1810 {
1811 TRANSFER (ta, 1);
1484 return 1; 1812 return 1;
1485 } 1813 }
1486 else 1814 else
1487 return 0; 1815 return 0;
1488} 1816}
1489 1817
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int 1818static int
1501api_cede (void) 1819api_cede_notself (pTHX)
1502{ 1820{
1503 dTHX; 1821 if (coro_nready)
1822 {
1504 struct transfer_args ta; 1823 struct coro_transfer_args ta;
1505 1824
1506 prepare_cede (aTHX_ &ta); 1825 prepare_cede_notself (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1); 1826 TRANSFER (ta, 1);
1511 return 1; 1827 return 1;
1512 } 1828 }
1513 else 1829 else
1514 return 0; 1830 return 0;
1515} 1831}
1516 1832
1517static int 1833static void
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags) 1834api_trace (pTHX_ SV *coro_sv, int flags)
1534{ 1835{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv); 1836 struct coro *coro = SvSTATE (coro_sv);
1537 1837
1838 if (coro->flags & CF_RUNNING)
1839 croak ("cannot enable tracing on a running coroutine, caught");
1840
1538 if (flags & CC_TRACE) 1841 if (flags & CC_TRACE)
1539 { 1842 {
1540 if (!coro->cctx) 1843 if (!coro->cctx)
1541 coro->cctx = cctx_new (); 1844 coro->cctx = cctx_new_run ();
1542 else if (!(coro->cctx->flags & CC_TRACE)) 1845 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack"); 1846 croak ("cannot enable tracing on coroutine with custom stack, caught");
1544 1847
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1848 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 } 1849 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1850 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 { 1851 {
… …
1553 else 1856 else
1554 coro->slot->runops = RUNOPS_DEFAULT; 1857 coro->slot->runops = RUNOPS_DEFAULT;
1555 } 1858 }
1556} 1859}
1557 1860
1861static void
1862coro_call_on_destroy (pTHX_ struct coro *coro)
1863{
1864 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1865 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1866
1867 if (on_destroyp)
1868 {
1869 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1870
1871 while (AvFILLp (on_destroy) >= 0)
1872 {
1873 dSP; /* don't disturb outer sp */
1874 SV *cb = av_pop (on_destroy);
1875
1876 PUSHMARK (SP);
1877
1878 if (statusp)
1879 {
1880 int i;
1881 AV *status = (AV *)SvRV (*statusp);
1882 EXTEND (SP, AvFILLp (status) + 1);
1883
1884 for (i = 0; i <= AvFILLp (status); ++i)
1885 PUSHs (AvARRAY (status)[i]);
1886 }
1887
1888 PUTBACK;
1889 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1890 }
1891 }
1892}
1893
1894static void
1895slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 int i;
1898 HV *hv = (HV *)SvRV (coro_current);
1899 AV *av = newAV ();
1900
1901 av_extend (av, items - 1);
1902 for (i = 0; i < items; ++i)
1903 av_push (av, SvREFCNT_inc_NN (arg [i]));
1904
1905 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1906
1907 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1908 api_ready (aTHX_ sv_manager);
1909
1910 frame->prepare = prepare_schedule;
1911 frame->check = slf_check_repeat;
1912
1913 /* as a minor optimisation, we could unwind all stacks here */
1914 /* but that puts extra pressure on pp_slf, and is not worth much */
1915 /*coro_unwind_stacks (aTHX);*/
1916}
1917
1918/*****************************************************************************/
1919/* async pool handler */
1920
1921static int
1922slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = (struct coro *)frame->data;
1926
1927 if (!coro->invoke_cb)
1928 return 1; /* loop till we have invoke */
1929 else
1930 {
1931 hv_store (hv, "desc", sizeof ("desc") - 1,
1932 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1933
1934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1935
1936 {
1937 dSP;
1938 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1939 PUTBACK;
1940 }
1941
1942 SvREFCNT_dec (GvAV (PL_defgv));
1943 GvAV (PL_defgv) = coro->invoke_av;
1944 coro->invoke_av = 0;
1945
1946 return 0;
1947 }
1948}
1949
1950static void
1951slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1952{
1953 HV *hv = (HV *)SvRV (coro_current);
1954 struct coro *coro = SvSTATE_hv ((SV *)hv);
1955
1956 if (expect_true (coro->saved_deffh))
1957 {
1958 /* subsequent iteration */
1959 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1960 coro->saved_deffh = 0;
1961
1962 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1963 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1964 {
1965 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1966 coro->invoke_av = newAV ();
1967
1968 frame->prepare = prepare_nop;
1969 }
1970 else
1971 {
1972 av_clear (GvAV (PL_defgv));
1973 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1974
1975 coro->prio = 0;
1976
1977 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1978 api_trace (aTHX_ coro_current, 0);
1979
1980 frame->prepare = prepare_schedule;
1981 av_push (av_async_pool, SvREFCNT_inc (hv));
1982 }
1983 }
1984 else
1985 {
1986 /* first iteration, simply fall through */
1987 frame->prepare = prepare_nop;
1988 }
1989
1990 frame->check = slf_check_pool_handler;
1991 frame->data = (void *)coro;
1992}
1993
1994/*****************************************************************************/
1995/* rouse callback */
1996
1997#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1998
1999static void
2000coro_rouse_callback (pTHX_ CV *cv)
2001{
2002 dXSARGS;
2003 SV *data = (SV *)GENSUB_ARG;
2004
2005 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2006 {
2007 /* first call, set args */
2008 SV *coro = SvRV (data);
2009 AV *av = newAV ();
2010
2011 SvRV_set (data, (SV *)av);
2012
2013 /* better take a full copy of the arguments */
2014 while (items--)
2015 av_store (av, items, newSVsv (ST (items)));
2016
2017 api_ready (aTHX_ coro);
2018 SvREFCNT_dec (coro);
2019 }
2020
2021 XSRETURN_EMPTY;
2022}
2023
2024static int
2025slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2026{
2027 SV *data = (SV *)frame->data;
2028
2029 if (CORO_THROW)
2030 return 0;
2031
2032 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2033 return 1;
2034
2035 /* now push all results on the stack */
2036 {
2037 dSP;
2038 AV *av = (AV *)SvRV (data);
2039 int i;
2040
2041 EXTEND (SP, AvFILLp (av) + 1);
2042 for (i = 0; i <= AvFILLp (av); ++i)
2043 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2044
2045 /* we have stolen the elements, so set length to zero and free */
2046 AvFILLp (av) = -1;
2047 av_undef (av);
2048
2049 PUTBACK;
2050 }
2051
2052 return 0;
2053}
2054
2055static void
2056slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2057{
2058 SV *cb;
2059
2060 if (items)
2061 cb = arg [0];
2062 else
2063 {
2064 struct coro *coro = SvSTATE_current;
2065
2066 if (!coro->rouse_cb)
2067 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2068
2069 cb = sv_2mortal (coro->rouse_cb);
2070 coro->rouse_cb = 0;
2071 }
2072
2073 if (!SvROK (cb)
2074 || SvTYPE (SvRV (cb)) != SVt_PVCV
2075 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2076 croak ("Coro::rouse_wait called with illegal callback argument,");
2077
2078 {
2079 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2080 SV *data = (SV *)GENSUB_ARG;
2081
2082 frame->data = (void *)data;
2083 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2084 frame->check = slf_check_rouse_wait;
2085 }
2086}
2087
2088static SV *
2089coro_new_rouse_cb (pTHX)
2090{
2091 HV *hv = (HV *)SvRV (coro_current);
2092 struct coro *coro = SvSTATE_hv (hv);
2093 SV *data = newRV_inc ((SV *)hv);
2094 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2095
2096 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2097 SvREFCNT_dec (data); /* magicext increases the refcount */
2098
2099 SvREFCNT_dec (coro->rouse_cb);
2100 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2101
2102 return cb;
2103}
2104
2105/*****************************************************************************/
2106/* schedule-like-function opcode (SLF) */
2107
2108static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2109static const CV *slf_cv;
2110static SV **slf_argv;
2111static int slf_argc, slf_arga; /* count, allocated */
2112static I32 slf_ax; /* top of stack, for restore */
2113
2114/* this restores the stack in the case we patched the entersub, to */
2115/* recreate the stack frame as perl will on following calls */
2116/* since entersub cleared the stack */
2117static OP *
2118pp_restore (pTHX)
2119{
2120 int i;
2121 SV **SP = PL_stack_base + slf_ax;
2122
2123 PUSHMARK (SP);
2124
2125 EXTEND (SP, slf_argc + 1);
2126
2127 for (i = 0; i < slf_argc; ++i)
2128 PUSHs (sv_2mortal (slf_argv [i]));
2129
2130 PUSHs ((SV *)CvGV (slf_cv));
2131
2132 RETURNOP (slf_restore.op_first);
2133}
2134
2135static void
2136slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2137{
2138 SV **arg = (SV **)slf_frame.data;
2139
2140 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2141}
2142
2143static void
2144slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2145{
2146 if (items != 2)
2147 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2148
2149 frame->prepare = slf_prepare_transfer;
2150 frame->check = slf_check_nop;
2151 frame->data = (void *)arg; /* let's hope it will stay valid */
2152}
2153
2154static void
2155slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_nop;
2159}
2160
2161static void
2162slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2163{
2164 struct coro *next = (struct coro *)slf_frame.data;
2165
2166 SvREFCNT_inc_NN (next->hv);
2167 prepare_schedule_to (aTHX_ ta, next);
2168}
2169
2170static void
2171slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2172{
2173 if (!items)
2174 croak ("Coro::schedule_to expects a coroutine argument, caught");
2175
2176 frame->data = (void *)SvSTATE (arg [0]);
2177 frame->prepare = slf_prepare_schedule_to;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2183{
2184 api_ready (aTHX_ SvRV (coro_current));
2185
2186 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2187}
2188
2189static void
2190slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 frame->prepare = prepare_cede;
2193 frame->check = slf_check_nop;
2194}
2195
2196static void
2197slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede_notself;
2200 frame->check = slf_check_nop;
2201}
2202
2203/*
2204 * these not obviously related functions are all rolled into one
2205 * function to increase chances that they all will call transfer with the same
2206 * stack offset
2207 * SLF stands for "schedule-like-function".
2208 */
2209static OP *
2210pp_slf (pTHX)
2211{
2212 I32 checkmark; /* mark SP to see how many elements check has pushed */
2213
2214 /* set up the slf frame, unless it has already been set-up */
2215 /* the latter happens when a new coro has been started */
2216 /* or when a new cctx was attached to an existing coroutine */
2217 if (expect_true (!slf_frame.prepare))
2218 {
2219 /* first iteration */
2220 dSP;
2221 SV **arg = PL_stack_base + TOPMARK + 1;
2222 int items = SP - arg; /* args without function object */
2223 SV *gv = *sp;
2224
2225 /* do a quick consistency check on the "function" object, and if it isn't */
2226 /* for us, divert to the real entersub */
2227 if (SvTYPE (gv) != SVt_PVGV
2228 || !GvCV (gv)
2229 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2230 return PL_ppaddr[OP_ENTERSUB](aTHX);
2231
2232 if (!(PL_op->op_flags & OPf_STACKED))
2233 {
2234 /* ampersand-form of call, use @_ instead of stack */
2235 AV *av = GvAV (PL_defgv);
2236 arg = AvARRAY (av);
2237 items = AvFILLp (av) + 1;
2238 }
2239
2240 /* now call the init function, which needs to set up slf_frame */
2241 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2242 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2243
2244 /* pop args */
2245 SP = PL_stack_base + POPMARK;
2246
2247 PUTBACK;
2248 }
2249
2250 /* now that we have a slf_frame, interpret it! */
2251 /* we use a callback system not to make the code needlessly */
2252 /* complicated, but so we can run multiple perl coros from one cctx */
2253
2254 do
2255 {
2256 struct coro_transfer_args ta;
2257
2258 slf_frame.prepare (aTHX_ &ta);
2259 TRANSFER (ta, 0);
2260
2261 checkmark = PL_stack_sp - PL_stack_base;
2262 }
2263 while (slf_frame.check (aTHX_ &slf_frame));
2264
2265 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2266
2267 /* exception handling */
2268 if (expect_false (CORO_THROW))
2269 {
2270 SV *exception = sv_2mortal (CORO_THROW);
2271
2272 CORO_THROW = 0;
2273 sv_setsv (ERRSV, exception);
2274 croak (0);
2275 }
2276
2277 /* return value handling - mostly like entersub */
2278 /* make sure we put something on the stack in scalar context */
2279 if (GIMME_V == G_SCALAR)
2280 {
2281 dSP;
2282 SV **bot = PL_stack_base + checkmark;
2283
2284 if (sp == bot) /* too few, push undef */
2285 bot [1] = &PL_sv_undef;
2286 else if (sp != bot + 1) /* too many, take last one */
2287 bot [1] = *sp;
2288
2289 SP = bot + 1;
2290
2291 PUTBACK;
2292 }
2293
2294 return NORMAL;
2295}
2296
2297static void
2298api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2299{
2300 int i;
2301 SV **arg = PL_stack_base + ax;
2302 int items = PL_stack_sp - arg + 1;
2303
2304 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2305
2306 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2307 && PL_op->op_ppaddr != pp_slf)
2308 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2309
2310 CvFLAGS (cv) |= CVf_SLF;
2311 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2312 slf_cv = cv;
2313
2314 /* we patch the op, and then re-run the whole call */
2315 /* we have to put the same argument on the stack for this to work */
2316 /* and this will be done by pp_restore */
2317 slf_restore.op_next = (OP *)&slf_restore;
2318 slf_restore.op_type = OP_CUSTOM;
2319 slf_restore.op_ppaddr = pp_restore;
2320 slf_restore.op_first = PL_op;
2321
2322 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2323
2324 if (PL_op->op_flags & OPf_STACKED)
2325 {
2326 if (items > slf_arga)
2327 {
2328 slf_arga = items;
2329 free (slf_argv);
2330 slf_argv = malloc (slf_arga * sizeof (SV *));
2331 }
2332
2333 slf_argc = items;
2334
2335 for (i = 0; i < items; ++i)
2336 slf_argv [i] = SvREFCNT_inc (arg [i]);
2337 }
2338 else
2339 slf_argc = 0;
2340
2341 PL_op->op_ppaddr = pp_slf;
2342 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2343
2344 PL_op = (OP *)&slf_restore;
2345}
2346
2347/*****************************************************************************/
2348/* dynamic wind */
2349
2350static void
2351on_enterleave_call (pTHX_ SV *cb)
2352{
2353 dSP;
2354
2355 PUSHSTACK;
2356
2357 PUSHMARK (SP);
2358 PUTBACK;
2359 call_sv (cb, G_VOID | G_DISCARD);
2360 SPAGAIN;
2361
2362 POPSTACK;
2363}
2364
2365static SV *
2366coro_avp_pop_and_free (pTHX_ AV **avp)
2367{
2368 AV *av = *avp;
2369 SV *res = av_pop (av);
2370
2371 if (AvFILLp (av) < 0)
2372 {
2373 *avp = 0;
2374 SvREFCNT_dec (av);
2375 }
2376
2377 return res;
2378}
2379
2380static void
2381coro_pop_on_enter (pTHX_ void *coro)
2382{
2383 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2384 SvREFCNT_dec (cb);
2385}
2386
2387static void
2388coro_pop_on_leave (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2391 on_enterleave_call (aTHX_ sv_2mortal (cb));
2392}
2393
2394/*****************************************************************************/
2395/* PerlIO::cede */
2396
2397typedef struct
2398{
2399 PerlIOBuf base;
2400 NV next, every;
2401} PerlIOCede;
2402
2403static IV
2404PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2405{
2406 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2407
2408 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2409 self->next = nvtime () + self->every;
2410
2411 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2412}
2413
2414static SV *
2415PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2416{
2417 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2418
2419 return newSVnv (self->every);
2420}
2421
2422static IV
2423PerlIOCede_flush (pTHX_ PerlIO *f)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426 double now = nvtime ();
2427
2428 if (now >= self->next)
2429 {
2430 api_cede (aTHX);
2431 self->next = now + self->every;
2432 }
2433
2434 return PerlIOBuf_flush (aTHX_ f);
2435}
2436
2437static PerlIO_funcs PerlIO_cede =
2438{
2439 sizeof(PerlIO_funcs),
2440 "cede",
2441 sizeof(PerlIOCede),
2442 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2443 PerlIOCede_pushed,
2444 PerlIOBuf_popped,
2445 PerlIOBuf_open,
2446 PerlIOBase_binmode,
2447 PerlIOCede_getarg,
2448 PerlIOBase_fileno,
2449 PerlIOBuf_dup,
2450 PerlIOBuf_read,
2451 PerlIOBuf_unread,
2452 PerlIOBuf_write,
2453 PerlIOBuf_seek,
2454 PerlIOBuf_tell,
2455 PerlIOBuf_close,
2456 PerlIOCede_flush,
2457 PerlIOBuf_fill,
2458 PerlIOBase_eof,
2459 PerlIOBase_error,
2460 PerlIOBase_clearerr,
2461 PerlIOBase_setlinebuf,
2462 PerlIOBuf_get_base,
2463 PerlIOBuf_bufsiz,
2464 PerlIOBuf_get_ptr,
2465 PerlIOBuf_get_cnt,
2466 PerlIOBuf_set_ptrcnt,
2467};
2468
2469/*****************************************************************************/
2470/* Coro::Semaphore & Coro::Signal */
2471
2472static SV *
2473coro_waitarray_new (pTHX_ int count)
2474{
2475 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2476 AV *av = newAV ();
2477 SV **ary;
2478
2479 /* unfortunately, building manually saves memory */
2480 Newx (ary, 2, SV *);
2481 AvALLOC (av) = ary;
2482#if PERL_VERSION_ATLEAST (5,10,0)
2483 AvARRAY (av) = ary;
2484#else
2485 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2486 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2487 SvPVX ((SV *)av) = (char *)ary;
2488#endif
2489 AvMAX (av) = 1;
2490 AvFILLp (av) = 0;
2491 ary [0] = newSViv (count);
2492
2493 return newRV_noinc ((SV *)av);
2494}
2495
2496/* semaphore */
2497
2498static void
2499coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2500{
2501 SV *count_sv = AvARRAY (av)[0];
2502 IV count = SvIVX (count_sv);
2503
2504 count += adjust;
2505 SvIVX (count_sv) = count;
2506
2507 /* now wake up as many waiters as are expected to lock */
2508 while (count > 0 && AvFILLp (av) > 0)
2509 {
2510 SV *cb;
2511
2512 /* swap first two elements so we can shift a waiter */
2513 AvARRAY (av)[0] = AvARRAY (av)[1];
2514 AvARRAY (av)[1] = count_sv;
2515 cb = av_shift (av);
2516
2517 if (SvOBJECT (cb))
2518 {
2519 api_ready (aTHX_ cb);
2520 --count;
2521 }
2522 else if (SvTYPE (cb) == SVt_PVCV)
2523 {
2524 dSP;
2525 PUSHMARK (SP);
2526 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2527 PUTBACK;
2528 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2529 }
2530
2531 SvREFCNT_dec (cb);
2532 }
2533}
2534
2535static void
2536coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2537{
2538 /* call $sem->adjust (0) to possibly wake up some other waiters */
2539 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2540}
2541
2542static int
2543slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2544{
2545 AV *av = (AV *)frame->data;
2546 SV *count_sv = AvARRAY (av)[0];
2547
2548 /* if we are about to throw, don't actually acquire the lock, just throw */
2549 if (CORO_THROW)
2550 return 0;
2551 else if (SvIVX (count_sv) > 0)
2552 {
2553 SvSTATE_current->on_destroy = 0;
2554
2555 if (acquire)
2556 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2557 else
2558 coro_semaphore_adjust (aTHX_ av, 0);
2559
2560 return 0;
2561 }
2562 else
2563 {
2564 int i;
2565 /* if we were woken up but can't down, we look through the whole */
2566 /* waiters list and only add us if we aren't in there already */
2567 /* this avoids some degenerate memory usage cases */
2568
2569 for (i = 1; i <= AvFILLp (av); ++i)
2570 if (AvARRAY (av)[i] == SvRV (coro_current))
2571 return 1;
2572
2573 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2574 return 1;
2575 }
2576}
2577
2578static int
2579slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2580{
2581 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2582}
2583
2584static int
2585slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2588}
2589
2590static void
2591slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 AV *av = (AV *)SvRV (arg [0]);
2594
2595 if (SvIVX (AvARRAY (av)[0]) > 0)
2596 {
2597 frame->data = (void *)av;
2598 frame->prepare = prepare_nop;
2599 }
2600 else
2601 {
2602 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2603
2604 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2605 frame->prepare = prepare_schedule;
2606
2607 /* to avoid race conditions when a woken-up coro gets terminated */
2608 /* we arrange for a temporary on_destroy that calls adjust (0) */
2609 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2610 }
2611}
2612
2613static void
2614slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2617 frame->check = slf_check_semaphore_down;
2618}
2619
2620static void
2621slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 if (items >= 2)
2624 {
2625 /* callback form */
2626 AV *av = (AV *)SvRV (arg [0]);
2627 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2628
2629 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2630
2631 if (SvIVX (AvARRAY (av)[0]) > 0)
2632 coro_semaphore_adjust (aTHX_ av, 0);
2633
2634 frame->prepare = prepare_nop;
2635 frame->check = slf_check_nop;
2636 }
2637 else
2638 {
2639 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2640 frame->check = slf_check_semaphore_wait;
2641 }
2642}
2643
2644/* signal */
2645
2646static void
2647coro_signal_wake (pTHX_ AV *av, int count)
2648{
2649 SvIVX (AvARRAY (av)[0]) = 0;
2650
2651 /* now signal count waiters */
2652 while (count > 0 && AvFILLp (av) > 0)
2653 {
2654 SV *cb;
2655
2656 /* swap first two elements so we can shift a waiter */
2657 cb = AvARRAY (av)[0];
2658 AvARRAY (av)[0] = AvARRAY (av)[1];
2659 AvARRAY (av)[1] = cb;
2660
2661 cb = av_shift (av);
2662
2663 api_ready (aTHX_ cb);
2664 sv_setiv (cb, 0); /* signal waiter */
2665 SvREFCNT_dec (cb);
2666
2667 --count;
2668 }
2669}
2670
2671static int
2672slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2673{
2674 /* if we are about to throw, also stop waiting */
2675 return SvROK ((SV *)frame->data) && !CORO_THROW;
2676}
2677
2678static void
2679slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2680{
2681 AV *av = (AV *)SvRV (arg [0]);
2682
2683 if (SvIVX (AvARRAY (av)[0]))
2684 {
2685 SvIVX (AvARRAY (av)[0]) = 0;
2686 frame->prepare = prepare_nop;
2687 frame->check = slf_check_nop;
2688 }
2689 else
2690 {
2691 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2692
2693 av_push (av, waiter);
2694
2695 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2696 frame->prepare = prepare_schedule;
2697 frame->check = slf_check_signal_wait;
2698 }
2699}
2700
2701/*****************************************************************************/
2702/* Coro::AIO */
2703
2704#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2705
2706/* helper storage struct */
2707struct io_state
2708{
2709 int errorno;
2710 I32 laststype; /* U16 in 5.10.0 */
2711 int laststatval;
2712 Stat_t statcache;
2713};
2714
2715static void
2716coro_aio_callback (pTHX_ CV *cv)
2717{
2718 dXSARGS;
2719 AV *state = (AV *)GENSUB_ARG;
2720 SV *coro = av_pop (state);
2721 SV *data_sv = newSV (sizeof (struct io_state));
2722
2723 av_extend (state, items - 1);
2724
2725 sv_upgrade (data_sv, SVt_PV);
2726 SvCUR_set (data_sv, sizeof (struct io_state));
2727 SvPOK_only (data_sv);
2728
2729 {
2730 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2731
2732 data->errorno = errno;
2733 data->laststype = PL_laststype;
2734 data->laststatval = PL_laststatval;
2735 data->statcache = PL_statcache;
2736 }
2737
2738 /* now build the result vector out of all the parameters and the data_sv */
2739 {
2740 int i;
2741
2742 for (i = 0; i < items; ++i)
2743 av_push (state, SvREFCNT_inc_NN (ST (i)));
2744 }
2745
2746 av_push (state, data_sv);
2747
2748 api_ready (aTHX_ coro);
2749 SvREFCNT_dec (coro);
2750 SvREFCNT_dec ((AV *)state);
2751}
2752
2753static int
2754slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2755{
2756 AV *state = (AV *)frame->data;
2757
2758 /* if we are about to throw, return early */
2759 /* this does not cancel the aio request, but at least */
2760 /* it quickly returns */
2761 if (CORO_THROW)
2762 return 0;
2763
2764 /* one element that is an RV? repeat! */
2765 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2766 return 1;
2767
2768 /* restore status */
2769 {
2770 SV *data_sv = av_pop (state);
2771 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2772
2773 errno = data->errorno;
2774 PL_laststype = data->laststype;
2775 PL_laststatval = data->laststatval;
2776 PL_statcache = data->statcache;
2777
2778 SvREFCNT_dec (data_sv);
2779 }
2780
2781 /* push result values */
2782 {
2783 dSP;
2784 int i;
2785
2786 EXTEND (SP, AvFILLp (state) + 1);
2787 for (i = 0; i <= AvFILLp (state); ++i)
2788 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2789
2790 PUTBACK;
2791 }
2792
2793 return 0;
2794}
2795
2796static void
2797slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2798{
2799 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2800 SV *coro_hv = SvRV (coro_current);
2801 struct coro *coro = SvSTATE_hv (coro_hv);
2802
2803 /* put our coroutine id on the state arg */
2804 av_push (state, SvREFCNT_inc_NN (coro_hv));
2805
2806 /* first see whether we have a non-zero priority and set it as AIO prio */
2807 if (coro->prio)
2808 {
2809 dSP;
2810
2811 static SV *prio_cv;
2812 static SV *prio_sv;
2813
2814 if (expect_false (!prio_cv))
2815 {
2816 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2817 prio_sv = newSViv (0);
2818 }
2819
2820 PUSHMARK (SP);
2821 sv_setiv (prio_sv, coro->prio);
2822 XPUSHs (prio_sv);
2823
2824 PUTBACK;
2825 call_sv (prio_cv, G_VOID | G_DISCARD);
2826 }
2827
2828 /* now call the original request */
2829 {
2830 dSP;
2831 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2832 int i;
2833
2834 PUSHMARK (SP);
2835
2836 /* first push all args to the stack */
2837 EXTEND (SP, items + 1);
2838
2839 for (i = 0; i < items; ++i)
2840 PUSHs (arg [i]);
2841
2842 /* now push the callback closure */
2843 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2844
2845 /* now call the AIO function - we assume our request is uncancelable */
2846 PUTBACK;
2847 call_sv ((SV *)req, G_VOID | G_DISCARD);
2848 }
2849
2850 /* now that the requets is going, we loop toll we have a result */
2851 frame->data = (void *)state;
2852 frame->prepare = prepare_schedule;
2853 frame->check = slf_check_aio_req;
2854}
2855
2856static void
2857coro_aio_req_xs (pTHX_ CV *cv)
2858{
2859 dXSARGS;
2860
2861 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2862
2863 XSRETURN_EMPTY;
2864}
2865
2866/*****************************************************************************/
2867
2868#if CORO_CLONE
2869# include "clone.c"
2870#endif
2871
1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2872MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1559 2873
1560PROTOTYPES: DISABLE 2874PROTOTYPES: DISABLE
1561 2875
1562BOOT: 2876BOOT:
1563{ 2877{
1564#ifdef USE_ITHREADS 2878#ifdef USE_ITHREADS
1565 MUTEX_INIT (&coro_mutex); 2879# if CORO_PTHREAD
2880 coro_thx = PERL_GET_CONTEXT;
2881# endif
1566#endif 2882#endif
1567 BOOT_PAGESIZE; 2883 BOOT_PAGESIZE;
2884
2885 cctx_current = cctx_new_empty ();
1568 2886
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2887 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2888 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571 2889
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2890 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2891 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set; 2892 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576 2893
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2894 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2895 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2896 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580 2897
… …
1589 main_top_env = PL_top_env; 2906 main_top_env = PL_top_env;
1590 2907
1591 while (main_top_env->je_prev) 2908 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev; 2909 main_top_env = main_top_env->je_prev;
1593 2910
2911 {
2912 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2913
2914 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2915 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2916
2917 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2918 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2919 }
2920
1594 coroapi.ver = CORO_API_VERSION; 2921 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION; 2922 coroapi.rev = CORO_API_REVISION;
2923
1596 coroapi.transfer = api_transfer; 2924 coroapi.transfer = api_transfer;
2925
2926 coroapi.sv_state = SvSTATE_;
2927 coroapi.execute_slf = api_execute_slf;
2928 coroapi.prepare_nop = prepare_nop;
2929 coroapi.prepare_schedule = prepare_schedule;
2930 coroapi.prepare_cede = prepare_cede;
2931 coroapi.prepare_cede_notself = prepare_cede_notself;
2932
2933 {
2934 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2935
2936 if (!svp) croak ("Time::HiRes is required");
2937 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2938
2939 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2940 }
1597 2941
1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2942 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1599} 2943}
1600 2944
1601SV * 2945SV *
1602new (char *klass, ...) 2946new (char *klass, ...)
2947 ALIAS:
2948 Coro::new = 1
1603 CODE: 2949 CODE:
1604{ 2950{
1605 struct coro *coro; 2951 struct coro *coro;
1606 MAGIC *mg; 2952 MAGIC *mg;
1607 HV *hv; 2953 HV *hv;
2954 CV *cb;
1608 int i; 2955 int i;
2956
2957 if (items > 1)
2958 {
2959 cb = coro_sv_2cv (aTHX_ ST (1));
2960
2961 if (!ix)
2962 {
2963 if (CvISXSUB (cb))
2964 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2965
2966 if (!CvROOT (cb))
2967 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2968 }
2969 }
1609 2970
1610 Newz (0, coro, 1, struct coro); 2971 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV (); 2972 coro->args = newAV ();
1612 coro->flags = CF_NEW; 2973 coro->flags = CF_NEW;
1613 2974
… …
1618 coro->hv = hv = newHV (); 2979 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2980 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP; 2981 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2982 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622 2983
2984 if (items > 1)
2985 {
1623 av_extend (coro->args, items - 1); 2986 av_extend (coro->args, items - 1 + ix - 1);
2987
2988 if (ix)
2989 {
2990 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2991 cb = cv_coro_run;
2992 }
2993
2994 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2995
1624 for (i = 1; i < items; i++) 2996 for (i = 2; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i))); 2997 av_push (coro->args, newSVsv (ST (i)));
2998 }
1626} 2999}
1627 OUTPUT: 3000 OUTPUT:
1628 RETVAL 3001 RETVAL
1629 3002
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
1633void 3003void
1634_set_stacklevel (...) 3004transfer (...)
1635 ALIAS: 3005 PROTOTYPE: $$
1636 Coro::State::transfer = 1 3006 CODE:
1637 Coro::schedule = 2 3007 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1638 Coro::cede = 3
1639 Coro::cede_notself = 4
1640 CODE:
1641{
1642 struct transfer_args ta;
1643
1644 PUTBACK;
1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
1673 SPAGAIN;
1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681 3008
1682bool 3009bool
1683_destroy (SV *coro_sv) 3010_destroy (SV *coro_sv)
1684 CODE: 3011 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3012 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT: 3013 OUTPUT:
1687 RETVAL 3014 RETVAL
1688 3015
1689void 3016void
1690_exit (code) 3017_exit (int code)
1691 int code
1692 PROTOTYPE: $ 3018 PROTOTYPE: $
1693 CODE: 3019 CODE:
1694 _exit (code); 3020 _exit (code);
1695 3021
3022SV *
3023clone (Coro::State coro)
3024 CODE:
3025{
3026#if CORO_CLONE
3027 struct coro *ncoro = coro_clone (aTHX_ coro);
3028 MAGIC *mg;
3029 /* TODO: too much duplication */
3030 ncoro->hv = newHV ();
3031 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3034#else
3035 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3036#endif
3037}
3038 OUTPUT:
3039 RETVAL
3040
1696int 3041int
1697cctx_stacksize (int new_stacksize = 0) 3042cctx_stacksize (int new_stacksize = 0)
3043 PROTOTYPE: ;$
1698 CODE: 3044 CODE:
1699 RETVAL = coro_stacksize; 3045 RETVAL = cctx_stacksize;
1700 if (new_stacksize) 3046 if (new_stacksize)
3047 {
1701 coro_stacksize = new_stacksize; 3048 cctx_stacksize = new_stacksize;
3049 ++cctx_gen;
3050 }
1702 OUTPUT: 3051 OUTPUT:
1703 RETVAL 3052 RETVAL
1704 3053
1705int 3054int
3055cctx_max_idle (int max_idle = 0)
3056 PROTOTYPE: ;$
3057 CODE:
3058 RETVAL = cctx_max_idle;
3059 if (max_idle > 1)
3060 cctx_max_idle = max_idle;
3061 OUTPUT:
3062 RETVAL
3063
3064int
1706cctx_count () 3065cctx_count ()
3066 PROTOTYPE:
1707 CODE: 3067 CODE:
1708 RETVAL = cctx_count; 3068 RETVAL = cctx_count;
1709 OUTPUT: 3069 OUTPUT:
1710 RETVAL 3070 RETVAL
1711 3071
1712int 3072int
1713cctx_idle () 3073cctx_idle ()
3074 PROTOTYPE:
1714 CODE: 3075 CODE:
1715 RETVAL = cctx_idle; 3076 RETVAL = cctx_idle;
1716 OUTPUT: 3077 OUTPUT:
1717 RETVAL 3078 RETVAL
1718 3079
1719void 3080void
1720list () 3081list ()
3082 PROTOTYPE:
1721 PPCODE: 3083 PPCODE:
1722{ 3084{
1723 struct coro *coro; 3085 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next) 3086 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv) 3087 if (coro->hv)
… …
1730call (Coro::State coro, SV *coderef) 3092call (Coro::State coro, SV *coderef)
1731 ALIAS: 3093 ALIAS:
1732 eval = 1 3094 eval = 1
1733 CODE: 3095 CODE:
1734{ 3096{
1735 if (coro->mainstack) 3097 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1736 { 3098 {
1737 struct coro temp; 3099 struct coro *current = SvSTATE_current;
1738 3100
1739 if (!(coro->flags & CF_RUNNING)) 3101 if (current != coro)
1740 { 3102 {
1741 PUTBACK; 3103 PUTBACK;
1742 save_perl (aTHX_ &temp); 3104 save_perl (aTHX_ current);
1743 load_perl (aTHX_ coro); 3105 load_perl (aTHX_ coro);
3106 SPAGAIN;
1744 } 3107 }
1745 3108
1746 {
1747 dSP;
1748 ENTER;
1749 SAVETMPS;
1750 PUTBACK;
1751 PUSHSTACK; 3109 PUSHSTACK;
3110
1752 PUSHMARK (SP); 3111 PUSHMARK (SP);
3112 PUTBACK;
1753 3113
1754 if (ix) 3114 if (ix)
1755 eval_sv (coderef, 0); 3115 eval_sv (coderef, 0);
1756 else 3116 else
1757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3117 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1758 3118
1759 POPSTACK; 3119 POPSTACK;
1760 SPAGAIN; 3120 SPAGAIN;
1761 FREETMPS;
1762 LEAVE;
1763 PUTBACK;
1764 }
1765 3121
1766 if (!(coro->flags & CF_RUNNING)) 3122 if (current != coro)
1767 { 3123 {
3124 PUTBACK;
1768 save_perl (aTHX_ coro); 3125 save_perl (aTHX_ coro);
1769 load_perl (aTHX_ &temp); 3126 load_perl (aTHX_ current);
1770 SPAGAIN; 3127 SPAGAIN;
1771 } 3128 }
1772 } 3129 }
1773} 3130}
1774 3131
… …
1778 ALIAS: 3135 ALIAS:
1779 is_ready = CF_READY 3136 is_ready = CF_READY
1780 is_running = CF_RUNNING 3137 is_running = CF_RUNNING
1781 is_new = CF_NEW 3138 is_new = CF_NEW
1782 is_destroyed = CF_DESTROYED 3139 is_destroyed = CF_DESTROYED
3140 is_suspended = CF_SUSPENDED
1783 CODE: 3141 CODE:
1784 RETVAL = boolSV (coro->flags & ix); 3142 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT: 3143 OUTPUT:
1786 RETVAL 3144 RETVAL
1787 3145
1788void 3146void
3147throw (Coro::State self, SV *throw = &PL_sv_undef)
3148 PROTOTYPE: $;$
3149 CODE:
3150{
3151 struct coro *current = SvSTATE_current;
3152 SV **throwp = self == current ? &CORO_THROW : &self->except;
3153 SvREFCNT_dec (*throwp);
3154 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3155}
3156
3157void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3158api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3159 PROTOTYPE: $;$
3160 C_ARGS: aTHX_ coro, flags
1790 3161
1791SV * 3162SV *
1792has_stack (Coro::State coro) 3163has_cctx (Coro::State coro)
1793 PROTOTYPE: $ 3164 PROTOTYPE: $
1794 CODE: 3165 CODE:
1795 RETVAL = boolSV (!!coro->cctx); 3166 /* maybe manage the running flag differently */
3167 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1796 OUTPUT: 3168 OUTPUT:
1797 RETVAL 3169 RETVAL
1798 3170
1799int 3171int
1800is_traced (Coro::State coro) 3172is_traced (Coro::State coro)
… …
1802 CODE: 3174 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3175 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT: 3176 OUTPUT:
1805 RETVAL 3177 RETVAL
1806 3178
1807IV 3179UV
1808rss (Coro::State coro) 3180rss (Coro::State coro)
1809 PROTOTYPE: $ 3181 PROTOTYPE: $
1810 ALIAS: 3182 ALIAS:
1811 usecount = 1 3183 usecount = 1
1812 CODE: 3184 CODE:
… …
1818 OUTPUT: 3190 OUTPUT:
1819 RETVAL 3191 RETVAL
1820 3192
1821void 3193void
1822force_cctx () 3194force_cctx ()
3195 PROTOTYPE:
1823 CODE: 3196 CODE:
1824 struct coro *coro = SvSTATE (coro_current);
1825 coro->cctx->idle_sp = 0; 3197 cctx_current->idle_sp = 0;
3198
3199void
3200swap_defsv (Coro::State self)
3201 PROTOTYPE: $
3202 ALIAS:
3203 swap_defav = 1
3204 CODE:
3205 if (!self->slot)
3206 croak ("cannot swap state with coroutine that has no saved state,");
3207 else
3208 {
3209 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3210 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3211
3212 SV *tmp = *src; *src = *dst; *dst = tmp;
3213 }
3214
3215void
3216cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3220
1826 3221
1827MODULE = Coro::State PACKAGE = Coro 3222MODULE = Coro::State PACKAGE = Coro
1828 3223
1829BOOT: 3224BOOT:
1830{ 3225{
1831 int i; 3226 int i;
1832 3227
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3228 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3229 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3230 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3231 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3232 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3233 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3234 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3235 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3236 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1836 3237
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3238 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1838 SvREADONLY_on (coro_current); 3239 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3240 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3241 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1839 3242
1840 coro_stash = gv_stashpv ("Coro", TRUE); 3243 coro_stash = gv_stashpv ("Coro", TRUE);
1841 3244
1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3245 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3246 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3247 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3248 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3249 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3250 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1848 3251
1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1850 coro_ready[i] = newAV ();
1851
1852 { 3252 {
1853 SV *sv = perl_get_sv ("Coro::API", TRUE); 3253 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1855 3254
1856 coroapi.schedule = api_schedule; 3255 coroapi.schedule = api_schedule;
3256 coroapi.schedule_to = api_schedule_to;
1857 coroapi.cede = api_cede; 3257 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself; 3258 coroapi.cede_notself = api_cede_notself;
1859 coroapi.ready = api_ready; 3259 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready; 3260 coroapi.is_ready = api_is_ready;
1861 coroapi.nready = &coro_nready; 3261 coroapi.nready = coro_nready;
1862 coroapi.current = coro_current; 3262 coroapi.current = coro_current;
1863 3263
1864 GCoroAPI = &coroapi; 3264 /*GCoroAPI = &coroapi;*/
1865 sv_setiv (sv, (IV)&coroapi); 3265 sv_setiv (sv, (IV)&coroapi);
1866 SvREADONLY_on (sv); 3266 SvREADONLY_on (sv);
1867 } 3267 }
1868} 3268}
3269
3270void
3271terminate (...)
3272 CODE:
3273 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3274
3275void
3276schedule (...)
3277 CODE:
3278 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3279
3280void
3281schedule_to (...)
3282 CODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3284
3285void
3286cede_to (...)
3287 CODE:
3288 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3289
3290void
3291cede (...)
3292 CODE:
3293 CORO_EXECUTE_SLF_XS (slf_init_cede);
3294
3295void
3296cede_notself (...)
3297 CODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1869 3299
1870void 3300void
1871_set_current (SV *current) 3301_set_current (SV *current)
1872 PROTOTYPE: $ 3302 PROTOTYPE: $
1873 CODE: 3303 CODE:
1874 SvREFCNT_dec (SvRV (coro_current)); 3304 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3305 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3306
3307void
3308_set_readyhook (SV *hook)
3309 PROTOTYPE: $
3310 CODE:
3311 SvREFCNT_dec (coro_readyhook);
3312 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1876 3313
1877int 3314int
1878prio (Coro::State coro, int newprio = 0) 3315prio (Coro::State coro, int newprio = 0)
3316 PROTOTYPE: $;$
1879 ALIAS: 3317 ALIAS:
1880 nice = 1 3318 nice = 1
1881 CODE: 3319 CODE:
1882{ 3320{
1883 RETVAL = coro->prio; 3321 RETVAL = coro->prio;
… …
1898 3336
1899SV * 3337SV *
1900ready (SV *self) 3338ready (SV *self)
1901 PROTOTYPE: $ 3339 PROTOTYPE: $
1902 CODE: 3340 CODE:
1903 RETVAL = boolSV (api_ready (self)); 3341 RETVAL = boolSV (api_ready (aTHX_ self));
1904 OUTPUT: 3342 OUTPUT:
1905 RETVAL 3343 RETVAL
1906 3344
1907int 3345int
1908nready (...) 3346nready (...)
… …
1911 RETVAL = coro_nready; 3349 RETVAL = coro_nready;
1912 OUTPUT: 3350 OUTPUT:
1913 RETVAL 3351 RETVAL
1914 3352
1915void 3353void
1916throw (Coro::State self, SV *throw = &PL_sv_undef) 3354suspend (Coro::State self)
1917 PROTOTYPE: $;$ 3355 PROTOTYPE: $
3356 CODE:
3357 self->flags |= CF_SUSPENDED;
3358
3359void
3360resume (Coro::State self)
3361 PROTOTYPE: $
3362 CODE:
3363 self->flags &= ~CF_SUSPENDED;
3364
3365void
3366_pool_handler (...)
3367 CODE:
3368 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3369
3370void
3371async_pool (SV *cv, ...)
3372 PROTOTYPE: &@
3373 PPCODE:
3374{
3375 HV *hv = (HV *)av_pop (av_async_pool);
3376 AV *av = newAV ();
3377 SV *cb = ST (0);
3378 int i;
3379
3380 av_extend (av, items - 2);
3381 for (i = 1; i < items; ++i)
3382 av_push (av, SvREFCNT_inc_NN (ST (i)));
3383
3384 if ((SV *)hv == &PL_sv_undef)
3385 {
3386 PUSHMARK (SP);
3387 EXTEND (SP, 2);
3388 PUSHs (sv_Coro);
3389 PUSHs ((SV *)cv_pool_handler);
3390 PUTBACK;
3391 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3392 SPAGAIN;
3393
3394 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3395 }
3396
3397 {
3398 struct coro *coro = SvSTATE_hv (hv);
3399
3400 assert (!coro->invoke_cb);
3401 assert (!coro->invoke_av);
3402 coro->invoke_cb = SvREFCNT_inc (cb);
3403 coro->invoke_av = av;
3404 }
3405
3406 api_ready (aTHX_ (SV *)hv);
3407
3408 if (GIMME_V != G_VOID)
3409 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3410 else
3411 SvREFCNT_dec (hv);
3412}
3413
3414SV *
3415rouse_cb ()
3416 PROTOTYPE:
3417 CODE:
3418 RETVAL = coro_new_rouse_cb (aTHX);
3419 OUTPUT:
3420 RETVAL
3421
3422void
3423rouse_wait (...)
3424 PROTOTYPE: ;$
3425 PPCODE:
3426 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3427
3428void
3429on_enter (SV *block)
3430 ALIAS:
3431 on_leave = 1
3432 PROTOTYPE: &
3433 CODE:
3434{
3435 struct coro *coro = SvSTATE_current;
3436 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3437
3438 block = (SV *)coro_sv_2cv (aTHX_ block);
3439
3440 if (!*avp)
3441 *avp = newAV ();
3442
3443 av_push (*avp, SvREFCNT_inc (block));
3444
3445 if (!ix)
3446 on_enterleave_call (aTHX_ block);
3447
3448 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3450 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3451}
3452
3453
3454MODULE = Coro::State PACKAGE = PerlIO::cede
3455
3456BOOT:
3457 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3458
3459
3460MODULE = Coro::State PACKAGE = Coro::Semaphore
3461
3462SV *
3463new (SV *klass, SV *count = 0)
3464 CODE:
3465 RETVAL = sv_bless (
3466 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3467 GvSTASH (CvGV (cv))
3468 );
3469 OUTPUT:
3470 RETVAL
3471
3472# helper for Coro::Channel and others
3473SV *
3474_alloc (int count)
3475 CODE:
3476 RETVAL = coro_waitarray_new (aTHX_ count);
3477 OUTPUT:
3478 RETVAL
3479
3480SV *
3481count (SV *self)
3482 CODE:
3483 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3484 OUTPUT:
3485 RETVAL
3486
3487void
3488up (SV *self, int adjust = 1)
3489 ALIAS:
3490 adjust = 1
1918 CODE: 3491 CODE:
1919 SvREFCNT_dec (self->throw); 3492 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921 3493
1922void 3494void
1923swap_defsv (Coro::State self) 3495down (...)
1924 PROTOTYPE: $
1925 ALIAS:
1926 swap_defav = 1
1927 CODE: 3496 CODE:
1928 if (!self->slot) 3497 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
1929 croak ("cannot swap state with coroutine that has no saved state"); 3498
3499void
3500wait (...)
3501 CODE:
3502 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3503
3504void
3505try (SV *self)
3506 PPCODE:
3507{
3508 AV *av = (AV *)SvRV (self);
3509 SV *count_sv = AvARRAY (av)[0];
3510 IV count = SvIVX (count_sv);
3511
3512 if (count > 0)
3513 {
3514 --count;
3515 SvIVX (count_sv) = count;
3516 XSRETURN_YES;
3517 }
3518 else
3519 XSRETURN_NO;
3520}
3521
3522void
3523waiters (SV *self)
3524 PPCODE:
3525{
3526 AV *av = (AV *)SvRV (self);
3527 int wcount = AvFILLp (av) + 1 - 1;
3528
3529 if (GIMME_V == G_SCALAR)
3530 XPUSHs (sv_2mortal (newSViv (wcount)));
1930 else 3531 else
1931 { 3532 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv); 3533 int i;
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv; 3534 EXTEND (SP, wcount);
1934 3535 for (i = 1; i <= wcount; ++i)
1935 SV *tmp = *src; *src = *dst; *dst = tmp; 3536 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1936 } 3537 }
3538}
1937 3539
1938# for async_pool speedup 3540MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3541
1939void 3542void
1940_pool_1 (SV *cb) 3543_may_delete (SV *sem, int count, int extra_refs)
3544 PPCODE:
3545{
3546 AV *av = (AV *)SvRV (sem);
3547
3548 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3549 && AvFILLp (av) == 0 /* no waiters, just count */
3550 && SvIV (AvARRAY (av)[0]) == count)
3551 XSRETURN_YES;
3552
3553 XSRETURN_NO;
3554}
3555
3556MODULE = Coro::State PACKAGE = Coro::Signal
3557
3558SV *
3559new (SV *klass)
1941 CODE: 3560 CODE:
1942{ 3561 RETVAL = sv_bless (
1943 struct coro *coro = SvSTATE (coro_current); 3562 coro_waitarray_new (aTHX_ 0),
1944 HV *hv = (HV *)SvRV (coro_current); 3563 GvSTASH (CvGV (cv))
1945 AV *defav = GvAV (PL_defgv); 3564 );
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0); 3565 OUTPUT:
1947 AV *invoke_av; 3566 RETVAL
1948 int i, len;
1949
1950 if (!invoke)
1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
1955
1956 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
1969 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
1973
1974 SvREFCNT_dec (invoke);
1975}
1976 3567
1977void 3568void
1978_pool_2 (SV *cb) 3569wait (...)
3570 CODE:
3571 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3572
3573void
3574broadcast (SV *self)
3575 CODE:
3576{
3577 AV *av = (AV *)SvRV (self);
3578 coro_signal_wake (aTHX_ av, AvFILLp (av));
3579}
3580
3581void
3582send (SV *self)
3583 CODE:
3584{
3585 AV *av = (AV *)SvRV (self);
3586
3587 if (AvFILLp (av))
3588 coro_signal_wake (aTHX_ av, 1);
3589 else
3590 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3591}
3592
3593IV
3594awaited (SV *self)
1979 CODE: 3595 CODE:
1980{ 3596 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
1981 struct coro *coro = SvSTATE (coro_current);
1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT: 3597 OUTPUT:
2027 RETVAL 3598 RETVAL
2028 3599
3600
3601MODULE = Coro::State PACKAGE = Coro::AnyEvent
3602
3603BOOT:
3604 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3605
2029void 3606void
2030_set_state (char *data_) 3607_schedule (...)
2031 PROTOTYPE: $
2032 CODE: 3608 CODE:
2033{ 3609{
2034 struct io_state *data = (void *)data_; 3610 static int incede;
2035 3611
2036 errno = data->errorno; 3612 api_cede_notself (aTHX);
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041 3613
3614 ++incede;
3615 while (coro_nready >= incede && api_cede (aTHX))
3616 ;
3617
3618 sv_setsv (sv_activity, &PL_sv_undef);
3619 if (coro_nready >= incede)
3620 {
3621 PUSHMARK (SP);
3622 PUTBACK;
3623 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3624 }
3625
3626 --incede;
3627}
3628
3629
3630MODULE = Coro::State PACKAGE = Coro::AIO
3631
3632void
3633_register (char *target, char *proto, SV *req)
3634 CODE:
3635{
3636 CV *req_cv = coro_sv_2cv (aTHX_ req);
3637 /* newXSproto doesn't return the CV on 5.8 */
3638 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3639 sv_setpv ((SV *)slf_cv, proto);
3640 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3641}
3642

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines