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Comparing Coro/Coro/State.xs (file contents):
Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC vs.
Revision 1.352 by root, Sat Jun 20 08:58:50 2009 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2 2
3#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#include <stdio.h> 13#include <stdio.h>
12#include <errno.h> 14#include <errno.h>
13#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
14 25
15#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
16# include <unistd.h> 27# include <unistd.h>
17# include <sys/mman.h> 28# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
35# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
36#endif 47#endif
37 48
38#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif 51#endif
44 52
45/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
47 55
48#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
53 61
54#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr 63# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
57# endif 65# endif
… …
70# ifndef IS_PADCONST 78# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
72# endif 80# endif
73#endif 81#endif
74 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
75/* 5.8.7 */ 110/* 5.8.7 */
76#ifndef SvRV_set 111#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
78#endif 113#endif
79 114
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 126#endif
92 127
93/* 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
94 * 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
95#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
97 137
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
99 139
100#if __GNUC__ >= 3 140#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
103#else 144#else
104# define attribute(x) 145# define attribute(x)
105# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
106#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
107 152
108#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
109 154
110#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
111 157
112#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 159# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 161# endif
162#endif
120 163
121/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 165
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;
130static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 174static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
136 177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
137static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
138 187
139/* async_pool helper stuff */ 188/* async_pool helper stuff */
140static SV *sv_pool_rss; 189static SV *sv_pool_rss;
141static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
142static 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;
143 199
144static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
146 202
147enum { 203enum {
… …
152 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154}; 210};
155 211
156/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx { 213typedef struct coro_cctx
214{
158 struct coro_cctx *next; 215 struct coro_cctx *next;
159 216
160 /* the stack */ 217 /* the stack */
161 void *sptr; 218 void *sptr;
162 size_t ssize; 219 size_t ssize;
… …
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 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 */
167 JMPENV *top_env; 224 JMPENV *top_env;
168 coro_context cctx; 225 coro_context cctx;
169 226
227 U32 gen;
170#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
171 int valgrind_id; 229 int valgrind_id;
172#endif 230#endif
173 unsigned char flags; 231 unsigned char flags;
174} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
175 237
176enum { 238enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
180 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 */
181}; 244};
182 245
183/* this is a structure representing a perl-level coroutine */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
184struct coro { 247typedef struct
185 /* the c coroutine allocated to this perl coroutine, if any */ 248{
186 coro_cctx *cctx; 249 SV *defsv;
187 250 AV *defav;
188 /* data associated with this coroutine (initial args) */ 251 SV *errsv;
189 AV *args; 252 SV *irsgv;
190 int refcnt; 253 HV *hinthv;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 SV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name; 254#define VAR(name,type) type name;
202# include "state.h" 255# include "state.h"
203#undef VAR 256#undef VAR
257} perl_slots;
258
259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
260
261/* this is a structure representing a perl-level coroutine */
262struct coro {
263 /* the C coroutine allocated to this perl coroutine, if any */
264 coro_cctx *cctx;
265
266 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
271 AV *mainstack;
272 perl_slots *slot; /* basically the saved sp */
273
274 CV *startcv; /* the CV to execute */
275 AV *args; /* data associated with this coroutine (initial args) */
276 int refcnt; /* coroutines are refcounted, yes */
277 int flags; /* CF_ flags */
278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
204 280
205 /* statistics */ 281 /* statistics */
206 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
207 283
208 /* coro process data */ 284 /* coro process data */
209 int prio; 285 int prio;
210 //SV *throw; 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
211 288
212 /* async_pool */ 289 /* async_pool */
213 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;
214 297
215 /* linked list */ 298 /* linked list */
216 struct coro *next, *prev; 299 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
218}; 300};
219 301
220typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
221typedef 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 */
222 309
223/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
224 311
225#define PRIO_MAX 3 312#define PRIO_MAX 3
226#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
229#define PRIO_IDLE -3 316#define PRIO_IDLE -3
230#define PRIO_MIN -4 317#define PRIO_MIN -4
231 318
232/* for Coro.pm */ 319/* for Coro.pm */
233static SV *coro_current; 320static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
235static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
236static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
237 326
238/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
239 328
329static SV *
330coro_get_sv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_sv (name, create);
335#endif
336 return get_sv (name, create);
337}
338
240static AV * 339static AV *
340coro_get_av (pTHX_ const char *name, int create)
341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_av (name, create);
345#endif
346 return get_av (name, create);
347}
348
349static HV *
350coro_get_hv (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_hv (name, create);
355#endif
356 return get_hv (name, create);
357}
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
425static AV *
241coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
242{ 427{
243 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
245 430
246 newpadlist = newAV (); 431 newpadlist = newAV ();
247 AvREAL_off (newpadlist); 432 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0) 433#if PERL_VERSION_ATLEAST (5,10,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else 435#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif 437#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist); 439 --AvFILLp (padlist);
255 440
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
257 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
258 443
259 return newpadlist; 444 return newpadlist;
260} 445}
261 446
262static void 447static void
263free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
264{ 449{
265 /* may be during global destruction */ 450 /* may be during global destruction */
266 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
267 { 452 {
268 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
269 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
270 { 456 {
271 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
272 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
273 { 459 I32 j = AvFILLp (av);
274 SV *sv; 460
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
276 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
277
278 SvREFCNT_dec (*svp);
279 }
280 } 466 }
281 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
282 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
283 } 472 }
284} 473}
285 474
286static int 475static int
… …
291 480
292 /* casting is fun. */ 481 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
295 484
296 SvREFCNT_dec (av); 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
297 486
298 return 0; 487 return 0;
299} 488}
300 489
301#define PERL_MAGIC_coro PERL_MAGIC_ext 490static MGVTBL coro_cv_vtbl = {
302 491 0, 0, 0, 0,
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 492 coro_cv_free
304 493};
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337 494
338/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
339static void 496static void
340get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
341{ 498{
342 MAGIC *mg = CORO_MAGIC (cv); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
343 AV *av; 500 AV *av;
344 501
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347 else 504 else
348 { 505 {
349#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
351 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
352 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
355#else 513#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
357#endif 515#endif
358 } 516 }
359} 517}
360 518
361static void 519static void
362put_padlist (pTHX_ CV *cv) 520put_padlist (pTHX_ CV *cv)
363{ 521{
364 MAGIC *mg = CORO_MAGIC (cv); 522 MAGIC *mg = CORO_MAGIC_cv (cv);
365 AV *av; 523 AV *av;
366 524
367 if (!mg) 525 if (expect_false (!mg))
368 { 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
374 527
375 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
376 529
377 if (AvFILLp (av) >= AvMAX (av)) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
378 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
379 532
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381} 534}
382 535
383/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
384 537
385static void 538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
386load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
387{ 543{
544 perl_slots *slot = c->slot;
545 c->slot = 0;
546
547 PL_mainstack = c->mainstack;
548
549 GvSV (PL_defgv) = slot->defsv;
550 GvAV (PL_defgv) = slot->defav;
551 GvSV (PL_errgv) = slot->errsv;
552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
554
388#define VAR(name,type) PL_ ## name = c->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
389# include "state.h" 556 # include "state.h"
390#undef VAR 557 #undef VAR
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 GvSV (irsgv) = c->irssv_sv;
396 558
397 { 559 {
398 dSP; 560 dSP;
561
399 CV *cv; 562 CV *cv;
400 563
401 /* now do the ugly restore mess */ 564 /* now do the ugly restore mess */
402 while ((cv = (CV *)POPs)) 565 while (expect_true (cv = (CV *)POPs))
403 { 566 {
404 put_padlist (aTHX_ cv); /* mark this padlist as available */ 567 put_padlist (aTHX_ cv); /* mark this padlist as available */
405 CvDEPTH (cv) = PTR2IV (POPs); 568 CvDEPTH (cv) = PTR2IV (POPs);
406 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
407 } 570 }
408 571
409 PUTBACK; 572 PUTBACK;
410 } 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 }
411} 585}
412 586
413static void 587static void
414save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
415{ 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
416 { 601 {
417 dSP; 602 dSP;
418 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
419 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
420 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
426 611
427 XPUSHs (Nullsv); 612 XPUSHs (Nullsv);
428 /* this loop was inspired by pp_caller */ 613 /* this loop was inspired by pp_caller */
429 for (;;) 614 for (;;)
430 { 615 {
431 while (cxix >= 0) 616 while (expect_true (cxix >= 0))
432 { 617 {
433 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
434 619
435 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
436 { 621 {
437 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
438 623
439 if (CvDEPTH (cv)) 624 if (expect_true (CvDEPTH (cv)))
440 { 625 {
441 EXTEND (SP, 3); 626 EXTEND (SP, 3);
442 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
443 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
444 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
445 630
446 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
447 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
448 } 633 }
449 } 634 }
450 } 635 }
451 636
452 if (top_si->si_type == PERLSI_MAIN) 637 if (expect_true (top_si->si_type == PERLSI_MAIN))
453 break; 638 break;
454 639
455 top_si = top_si->si_prev; 640 top_si = top_si->si_prev;
456 ccstk = top_si->si_cxstack; 641 ccstk = top_si->si_cxstack;
457 cxix = top_si->si_cxix; 642 cxix = top_si->si_cxix;
458 } 643 }
459 644
460 PUTBACK; 645 PUTBACK;
461 } 646 }
462 647
648 /* allocate some space on the context stack for our purposes */
649 /* we manually unroll here, as usually 2 slots is enough */
650 if (SLOT_COUNT >= 1) CXINC;
651 if (SLOT_COUNT >= 2) CXINC;
652 if (SLOT_COUNT >= 3) CXINC;
653 {
654 int i;
655 for (i = 3; i < SLOT_COUNT; ++i)
656 CXINC;
657 }
658 cxstack_ix -= SLOT_COUNT; /* undo allocation */
659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
463 c->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
464 c->defsv = DEFSV; 666 slot->defsv = DEFSV;
465 c->errsv = ERRSV; 667 slot->errsv = ERRSV;
466 c->irssv_sv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
467 670
468#define VAR(name,type)c->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
469# include "state.h" 672 # include "state.h"
470#undef VAR 673 #undef VAR
674 }
471} 675}
472 676
473/* 677/*
474 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
475 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
478 */ 682 */
479#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
481#else 685#else
482static void 686static void
483coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
484{ 688{
485 PL_curstackinfo = new_stackinfo(64, 6); 689 PL_curstackinfo = new_stackinfo(32, 8);
486 PL_curstackinfo->si_type = PERLSI_MAIN; 690 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack; 691 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489 693
490 PL_stack_base = AvARRAY(PL_curstack); 694 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base; 695 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493 697
494 New(50,PL_tmps_stack,64,SV*); 698 New(50,PL_tmps_stack,32,SV*);
495 PL_tmps_floor = -1; 699 PL_tmps_floor = -1;
496 PL_tmps_ix = -1; 700 PL_tmps_ix = -1;
497 PL_tmps_max = 64; 701 PL_tmps_max = 32;
498 702
499 New(54,PL_markstack,16,I32); 703 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack; 704 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16; 705 PL_markstack_max = PL_markstack + 16;
502 706
503#ifdef SET_MARK_OFFSET 707#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET; 708 SET_MARK_OFFSET;
505#endif 709#endif
506 710
507 New(54,PL_scopestack,16,I32); 711 New(54,PL_scopestack,8,I32);
508 PL_scopestack_ix = 0; 712 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16; 713 PL_scopestack_max = 8;
510 714
511 New(54,PL_savestack,64,ANY); 715 New(54,PL_savestack,24,ANY);
512 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
513 PL_savestack_max = 64; 717 PL_savestack_max = 24;
514 718
515#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
516 New(54,PL_retstack,4,OP*); 720 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
518 PL_retstack_max = 4; 722 PL_retstack_max = 4;
519#endif 723#endif
520} 724}
… …
522 726
523/* 727/*
524 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
525 */ 729 */
526static void 730static void
527coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
528{ 732{
529 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
531 735
532 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
543 747
544 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack); 749 Safefree (PL_markstack);
546 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
547 Safefree (PL_savestack); 751 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
549 Safefree (PL_retstack); 753 Safefree (PL_retstack);
550#endif 754#endif
551} 755}
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);
552 765
553static size_t 766static size_t
554coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
555{ 768{
556 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
557 770
558 if (coro->mainstack) 771 if (coro->mainstack)
559 { 772 {
560 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
561 { 774 {
562 #define VAR(name,type)coro->name = PL_ ## name; 775 #define SYM(sym) PL_ ## sym
563 # include "state.h" 776 CORO_RSS;
564 #undef VAR 777 #undef SYM
565 } 778 }
566 779 else
567 rss += sizeof (coro->curstackinfo); 780 {
568 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 781 #define SYM(sym) coro->slot->sym
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 782 CORO_RSS;
570 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 783 #undef SYM
571 rss += coro->tmps_max * sizeof (SV *); 784 }
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575
576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 } 785 }
580 786
581 return rss; 787 return rss;
582} 788}
583 789
584/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
585 791
792static int (*orig_sigelem_get) (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
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
586static void 809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 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 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
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
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
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 */
587coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
588{ 902{
589 /* 903 /*
590 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
591 */ 905 */
… …
593 907
594 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
598 PL_curpm = 0; 915 PL_curpm = 0;
916 PL_curpad = 0;
599 PL_localizing = 0; 917 PL_localizing = 0;
600 PL_dirty = 0; 918 PL_dirty = 0;
601 PL_restartop = 0; 919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
926 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
602 928
603 GvSV (PL_defgv) = NEWSV (0, 0); 929 GvSV (PL_defgv) = newSV (0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0); 931 GvSV (PL_errgv) = newSV (0);
606 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;
607 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
608 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
609 {
610 IO *io = newIO ();
611 PL_defoutgv = newGVgen ("Coro");
612 GvIOp(PL_defoutgv) = io;
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 }
617 936
618 { 937 {
619 dSP; 938 dSP;
620 LOGOP myop; 939 UNOP myop;
621 940
622 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
623 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
624 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
625 945
626 PUSHMARK (SP); 946 PUSHMARK (SP);
627 XPUSHs (av_shift (GvAV (PL_defgv))); 947 PUSHs ((SV *)coro->startcv);
628 PUTBACK; 948 PUTBACK;
629 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
630 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631 SPAGAIN;
632 } 951 }
633 952
634 ENTER; /* necessary e.g. for dounwind */ 953 /* this newly created coroutine might be run on an existing cctx which most
635} 954 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
955 */
956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
636 958
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
637static void 971static void
638coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
639{ 973{
640 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
641 { 975 {
642 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
643 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
651 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
652 986
653 /* unwind main stack */ 987 /* unwind main stack */
654 dounwind (-1); 988 dounwind (-1);
655 } 989 }
990}
656 991
657 SvREFCNT_dec (GvSV (PL_defgv)); 992static void
658 SvREFCNT_dec (GvAV (PL_defgv)); 993coro_destruct_perl (pTHX_ struct coro *coro)
659 SvREFCNT_dec (GvSV (PL_errgv)); 994{
660 SvREFCNT_dec (PL_defoutgv); 995 SV *svf [9];
661 SvREFCNT_dec (PL_rs);
662 SvREFCNT_dec (GvSV (irsgv));
663 996
997 {
998 struct coro *current = SvSTATE_current;
999
1000 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1001
1002 save_perl (aTHX_ current);
1003 load_perl (aTHX_ coro);
1004
1005 coro_unwind_stacks (aTHX);
1006 coro_destruct_stacks (aTHX);
1007
1008 // now save some sv's to be free'd later
1009 svf [0] = GvSV (PL_defgv);
1010 svf [1] = (SV *)GvAV (PL_defgv);
1011 svf [2] = GvSV (PL_errgv);
1012 svf [3] = (SV *)PL_defoutgv;
1013 svf [4] = PL_rs;
1014 svf [5] = GvSV (irsgv);
1015 svf [6] = (SV *)GvHV (PL_hintgv);
1016 svf [7] = PL_diehook;
1017 svf [8] = PL_warnhook;
1018 assert (9 == sizeof (svf) / sizeof (*svf));
1019
1020 load_perl (aTHX_ current);
1021 }
1022
1023 {
1024 int i;
1025
1026 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1027 SvREFCNT_dec (svf [i]);
1028
664 SvREFCNT_dec (coro->saved_deffh); 1029 SvREFCNT_dec (coro->saved_deffh);
665 //SvREFCNT_dec (coro->throw); 1030 SvREFCNT_dec (coro->rouse_cb);
666 1031 SvREFCNT_dec (coro->invoke_cb);
667 coro_destroy_stacks (aTHX); 1032 SvREFCNT_dec (coro->invoke_av);
1033 }
668} 1034}
669 1035
670static void 1036INLINE void
671free_coro_mortal (pTHX) 1037free_coro_mortal (pTHX)
672{ 1038{
673 if (coro_mortal) 1039 if (expect_true (coro_mortal))
674 { 1040 {
675 SvREFCNT_dec (coro_mortal); 1041 SvREFCNT_dec (coro_mortal);
676 coro_mortal = 0; 1042 coro_mortal = 0;
677 } 1043 }
678} 1044}
… …
680static int 1046static int
681runops_trace (pTHX) 1047runops_trace (pTHX)
682{ 1048{
683 COP *oldcop = 0; 1049 COP *oldcop = 0;
684 int oldcxix = -2; 1050 int oldcxix = -2;
685 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
686 coro_cctx *cctx = coro->cctx;
687 1051
688 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
689 { 1053 {
690 PERL_ASYNC_CHECK (); 1054 PERL_ASYNC_CHECK ();
691 1055
692 if (cctx->flags & CC_TRACE_ALL) 1056 if (cctx_current->flags & CC_TRACE_ALL)
693 { 1057 {
694 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1058 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
695 { 1059 {
696 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 SV **bot, **top; 1061 SV **bot, **top;
698 AV *av = newAV (); /* return values */ 1062 AV *av = newAV (); /* return values */
699 SV **cb; 1063 SV **cb;
… …
707 bot = PL_stack_base + cx->blk_oldsp + 1; 1071 bot = PL_stack_base + cx->blk_oldsp + 1;
708 top = cx->blk_gimme == G_ARRAY ? SP + 1 1072 top = cx->blk_gimme == G_ARRAY ? SP + 1
709 : cx->blk_gimme == G_SCALAR ? bot + 1 1073 : cx->blk_gimme == G_SCALAR ? bot + 1
710 : bot; 1074 : bot;
711 1075
1076 av_extend (av, top - bot);
712 while (bot < top) 1077 while (bot < top)
713 av_push (av, SvREFCNT_inc (*bot++)); 1078 av_push (av, SvREFCNT_inc_NN (*bot++));
714 1079
715 PL_runops = RUNOPS_DEFAULT; 1080 PL_runops = RUNOPS_DEFAULT;
716 ENTER; 1081 ENTER;
717 SAVETMPS; 1082 SAVETMPS;
718 EXTEND (SP, 3); 1083 EXTEND (SP, 3);
… …
735 1100
736 if (PL_curcop != &PL_compiling) 1101 if (PL_curcop != &PL_compiling)
737 { 1102 {
738 SV **cb; 1103 SV **cb;
739 1104
740 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
741 { 1106 {
742 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
743 1108
744 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
745 { 1110 {
746 runops_proc_t old_runops = PL_runops;
747 dSP; 1111 dSP;
748 GV *gv = CvGV (cx->blk_sub.cv); 1112 GV *gv = CvGV (cx->blk_sub.cv);
749 SV *fullname = sv_2mortal (newSV (0)); 1113 SV *fullname = sv_2mortal (newSV (0));
750 1114
751 if (isGV (gv)) 1115 if (isGV (gv))
… …
756 SAVETMPS; 1120 SAVETMPS;
757 EXTEND (SP, 3); 1121 EXTEND (SP, 3);
758 PUSHMARK (SP); 1122 PUSHMARK (SP);
759 PUSHs (&PL_sv_yes); 1123 PUSHs (&PL_sv_yes);
760 PUSHs (fullname); 1124 PUSHs (fullname);
761 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1125 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
762 PUTBACK; 1126 PUTBACK;
763 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
764 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
765 SPAGAIN; 1129 SPAGAIN;
766 FREETMPS; 1130 FREETMPS;
… …
769 } 1133 }
770 1134
771 oldcxix = cxstack_ix; 1135 oldcxix = cxstack_ix;
772 } 1136 }
773 1137
774 if (cctx->flags & CC_TRACE_LINE) 1138 if (cctx_current->flags & CC_TRACE_LINE)
775 { 1139 {
776 dSP; 1140 dSP;
777 1141
778 PL_runops = RUNOPS_DEFAULT; 1142 PL_runops = RUNOPS_DEFAULT;
779 ENTER; 1143 ENTER;
… …
798 1162
799 TAINT_NOT; 1163 TAINT_NOT;
800 return 0; 1164 return 0;
801} 1165}
802 1166
803/* inject a fake call to Coro::State::_cctx_init into the execution */ 1167static struct CoroSLF cctx_ssl_frame;
804/* _cctx_init should be careful, as it could be called at almost any time */ 1168
805/* during execution of a perl program */ 1169static void
1170slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1171{
1172 ta->prev = 0;
1173}
1174
1175static int
1176slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1177{
1178 *frame = cctx_ssl_frame;
1179
1180 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1181}
1182
1183/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
806static void NOINLINE 1184static void NOINLINE
807prepare_cctx (pTHX_ coro_cctx *cctx) 1185cctx_prepare (pTHX)
808{ 1186{
809 dSP;
810 LOGOP myop;
811
812 PL_top_env = &PL_start_env; 1187 PL_top_env = &PL_start_env;
813 1188
814 if (cctx->flags & CC_TRACE) 1189 if (cctx_current->flags & CC_TRACE)
815 PL_runops = runops_trace; 1190 PL_runops = runops_trace;
816 1191
817 Zero (&myop, 1, LOGOP); 1192 /* we already must be executing an SLF op, there is no other valid way
818 myop.op_next = PL_op; 1193 * that can lead to creation of a new cctx */
819 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1194 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1195 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
820 1196
821 PUSHMARK (SP); 1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
822 EXTEND (SP, 2); 1198 cctx_ssl_frame = slf_frame;
823 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1199
824 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1200 slf_frame.prepare = slf_prepare_set_stacklevel;
825 PUTBACK; 1201 slf_frame.check = slf_check_set_stacklevel;
826 PL_op = (OP *)&myop; 1202}
827 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1203
828 SPAGAIN; 1204/* the tail of transfer: execute stuff we can only do after a transfer */
1205INLINE void
1206transfer_tail (pTHX)
1207{
1208 free_coro_mortal (aTHX);
829} 1209}
830 1210
831/* 1211/*
832 * this is a _very_ stripped down perl interpreter ;) 1212 * this is a _very_ stripped down perl interpreter ;)
833 */ 1213 */
834static void 1214static void
835coro_run (void *arg) 1215cctx_run (void *arg)
836{ 1216{
1217#ifdef USE_ITHREADS
1218# if CORO_PTHREAD
1219 PERL_SET_CONTEXT (coro_thx);
1220# endif
1221#endif
1222 {
837 dTHX; 1223 dTHX;
838 1224
839 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1225 /* normally we would need to skip the entersub here */
840 UNLOCK; 1226 /* not doing so will re-execute it, which is exactly what we want */
841
842 /* we now skip the entersub that lead to transfer() */
843 PL_op = PL_op->op_next; 1227 /* PL_nop = PL_nop->op_next */
844 1228
845 /* inject a fake subroutine call to cctx_init */ 1229 /* inject a fake subroutine call to cctx_init */
846 prepare_cctx (aTHX_ (coro_cctx *)arg); 1230 cctx_prepare (aTHX);
847 1231
1232 /* cctx_run is the alternative tail of transfer() */
1233 transfer_tail (aTHX);
1234
848 /* somebody or something will hit me for both perl_run and PL_restartop */ 1235 /* somebody or something will hit me for both perl_run and PL_restartop */
849 PL_restartop = PL_op; 1236 PL_restartop = PL_op;
850 perl_run (PL_curinterp); 1237 perl_run (PL_curinterp);
851
852 /* 1238 /*
1239 * Unfortunately, there is no way to get at the return values of the
1240 * coro body here, as perl_run destroys these
1241 */
1242
1243 /*
853 * If perl-run returns we assume exit() was being called or the coro 1244 * If perl-run returns we assume exit() was being called or the coro
854 * fell off the end, which seems to be the only valid (non-bug) 1245 * fell off the end, which seems to be the only valid (non-bug)
855 * reason for perl_run to return. We try to exit by jumping to the 1246 * reason for perl_run to return. We try to exit by jumping to the
856 * bootstrap-time "top" top_env, as we cannot restore the "main" 1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
857 * coroutine as Coro has no such concept 1248 * coroutine as Coro has no such concept.
1249 * This actually isn't valid with the pthread backend, but OSes requiring
1250 * that backend are too broken to do it in a standards-compliant way.
858 */ 1251 */
859 PL_top_env = main_top_env; 1252 PL_top_env = main_top_env;
860 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1253 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1254 }
861} 1255}
862 1256
863static coro_cctx * 1257static coro_cctx *
864cctx_new () 1258cctx_new ()
865{ 1259{
866 coro_cctx *cctx; 1260 coro_cctx *cctx;
1261
1262 ++cctx_count;
1263 New (0, cctx, 1, coro_cctx);
1264
1265 cctx->gen = cctx_gen;
1266 cctx->flags = 0;
1267 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1268
1269 return cctx;
1270}
1271
1272/* create a new cctx only suitable as source */
1273static coro_cctx *
1274cctx_new_empty ()
1275{
1276 coro_cctx *cctx = cctx_new ();
1277
1278 cctx->sptr = 0;
1279 coro_create (&cctx->cctx, 0, 0, 0, 0);
1280
1281 return cctx;
1282}
1283
1284/* create a new cctx suitable as destination/running a perl interpreter */
1285static coro_cctx *
1286cctx_new_run ()
1287{
1288 coro_cctx *cctx = cctx_new ();
867 void *stack_start; 1289 void *stack_start;
868 size_t stack_size; 1290 size_t stack_size;
869 1291
870 ++cctx_count;
871
872 Newz (0, cctx, 1, coro_cctx);
873
874#if HAVE_MMAP 1292#if HAVE_MMAP
875
876 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1293 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
877 /* mmap supposedly does allocate-on-write for us */ 1294 /* mmap supposedly does allocate-on-write for us */
878 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1295 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
879 1296
880 if (cctx->sptr != (void *)-1) 1297 if (cctx->sptr != (void *)-1)
881 { 1298 {
882# if CORO_STACKGUARD 1299 #if CORO_STACKGUARD
883 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1300 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
884# endif 1301 #endif
885 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1302 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
886 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1303 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
887 cctx->flags |= CC_MAPPED; 1304 cctx->flags |= CC_MAPPED;
888 } 1305 }
889 else 1306 else
890#endif 1307#endif
891 { 1308 {
892 cctx->ssize = coro_stacksize * (long)sizeof (long); 1309 cctx->ssize = cctx_stacksize * (long)sizeof (long);
893 New (0, cctx->sptr, coro_stacksize, long); 1310 New (0, cctx->sptr, cctx_stacksize, long);
894 1311
895 if (!cctx->sptr) 1312 if (!cctx->sptr)
896 { 1313 {
897 perror ("FATAL: unable to allocate stack for coroutine"); 1314 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
898 _exit (EXIT_FAILURE); 1315 _exit (EXIT_FAILURE);
899 } 1316 }
900 1317
901 stack_start = cctx->sptr; 1318 stack_start = cctx->sptr;
902 stack_size = cctx->ssize; 1319 stack_size = cctx->ssize;
903 } 1320 }
904 1321
905 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1322 #if CORO_USE_VALGRIND
1323 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1324 #endif
1325
906 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1326 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
907 1327
908 return cctx; 1328 return cctx;
909} 1329}
910 1330
911static void 1331static void
912cctx_destroy (coro_cctx *cctx) 1332cctx_destroy (coro_cctx *cctx)
913{ 1333{
914 if (!cctx) 1334 if (!cctx)
915 return; 1335 return;
916 1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
917 --cctx_count; 1339 --cctx_count;
1340 coro_destroy (&cctx->cctx);
918 1341
1342 /* coro_transfer creates new, empty cctx's */
1343 if (cctx->sptr)
1344 {
919#if CORO_USE_VALGRIND 1345 #if CORO_USE_VALGRIND
920 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1346 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
921#endif 1347 #endif
922 1348
923#if HAVE_MMAP 1349#if HAVE_MMAP
924 if (cctx->flags & CC_MAPPED) 1350 if (cctx->flags & CC_MAPPED)
925 munmap (cctx->sptr, cctx->ssize); 1351 munmap (cctx->sptr, cctx->ssize);
926 else 1352 else
927#endif 1353#endif
928 Safefree (cctx->sptr); 1354 Safefree (cctx->sptr);
1355 }
929 1356
930 Safefree (cctx); 1357 Safefree (cctx);
931} 1358}
1359
1360/* wether this cctx should be destructed */
1361#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
932 1362
933static coro_cctx * 1363static coro_cctx *
934cctx_get (pTHX) 1364cctx_get (pTHX)
935{ 1365{
936 while (cctx_first) 1366 while (expect_true (cctx_first))
937 { 1367 {
938 coro_cctx *cctx = cctx_first; 1368 coro_cctx *cctx = cctx_first;
939 cctx_first = cctx->next; 1369 cctx_first = cctx->next;
940 --cctx_idle; 1370 --cctx_idle;
941 1371
942 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1372 if (expect_true (!CCTX_EXPIRED (cctx)))
943 return cctx; 1373 return cctx;
944 1374
945 cctx_destroy (cctx); 1375 cctx_destroy (cctx);
946 } 1376 }
947 1377
948 return cctx_new (); 1378 return cctx_new_run ();
949} 1379}
950 1380
951static void 1381static void
952cctx_put (coro_cctx *cctx) 1382cctx_put (coro_cctx *cctx)
953{ 1383{
1384 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1385
954 /* free another cctx if overlimit */ 1386 /* free another cctx if overlimit */
955 if (cctx_idle >= MAX_IDLE_CCTX) 1387 if (expect_false (cctx_idle >= cctx_max_idle))
956 { 1388 {
957 coro_cctx *first = cctx_first; 1389 coro_cctx *first = cctx_first;
958 cctx_first = first->next; 1390 cctx_first = first->next;
959 --cctx_idle; 1391 --cctx_idle;
960 1392
… …
966 cctx_first = cctx; 1398 cctx_first = cctx;
967} 1399}
968 1400
969/** coroutine switching *****************************************************/ 1401/** coroutine switching *****************************************************/
970 1402
971static void NOINLINE 1403static void
972transfer_check (pTHX_ struct coro *prev, struct coro *next) 1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
973{ 1405{
974 if (prev != next) 1406 /* TODO: throwing up here is considered harmful */
1407
1408 if (expect_true (prev != next))
975 { 1409 {
976 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
977 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1411 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
978 1412
979 if (next->flags & CF_RUNNING) 1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
980 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
981
982 if (next->flags & CF_DESTROYED)
983 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1414 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
984 1415
1416#if !PERL_VERSION_ATLEAST (5,10,0)
985 if (PL_lex_state != LEX_NOTPARSING) 1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
986 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1418 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1419#endif
987 } 1420 }
988} 1421}
989 1422
990/* always use the TRANSFER macro */ 1423/* always use the TRANSFER macro */
991static void NOINLINE 1424static void NOINLINE /* noinline so we have a fixed stackframe */
992transfer (pTHX_ struct coro *prev, struct coro *next) 1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
993{ 1426{
994 dSTACKLEVEL; 1427 dSTACKLEVEL;
995 1428
996 /* sometimes transfer is only called to set idle_sp */ 1429 /* sometimes transfer is only called to set idle_sp */
997 if (!next) 1430 if (expect_false (!prev))
998 { 1431 {
999 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1432 cctx_current->idle_sp = STACKLEVEL;
1000 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1433 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1001 }
1002 else if (prev != next)
1003 { 1434 }
1435 else if (expect_true (prev != next))
1436 {
1004 coro_cctx *prev__cctx; 1437 coro_cctx *cctx_prev;
1005 1438
1006 if (prev->flags & CF_NEW) 1439 if (expect_false (prev->flags & CF_NEW))
1007 { 1440 {
1008 /* create a new empty context */ 1441 /* create a new empty/source context */
1009 Newz (0, prev->cctx, 1, coro_cctx);
1010 prev->flags &= ~CF_NEW; 1442 prev->flags &= ~CF_NEW;
1011 prev->flags |= CF_RUNNING; 1443 prev->flags |= CF_RUNNING;
1012 } 1444 }
1013 1445
1014 prev->flags &= ~CF_RUNNING; 1446 prev->flags &= ~CF_RUNNING;
1015 next->flags |= CF_RUNNING; 1447 next->flags |= CF_RUNNING;
1016 1448
1017 LOCK; 1449 /* first get rid of the old state */
1450 save_perl (aTHX_ prev);
1018 1451
1019 if (next->flags & CF_NEW) 1452 if (expect_false (next->flags & CF_NEW))
1020 { 1453 {
1021 /* need to start coroutine */ 1454 /* need to start coroutine */
1022 next->flags &= ~CF_NEW; 1455 next->flags &= ~CF_NEW;
1023 /* first get rid of the old state */
1024 save_perl (aTHX_ prev);
1025 /* setup coroutine call */ 1456 /* setup coroutine call */
1026 coro_setup (aTHX_ next); 1457 coro_setup (aTHX_ next);
1027 } 1458 }
1028 else 1459 else
1460 load_perl (aTHX_ next);
1461
1462 /* possibly untie and reuse the cctx */
1463 if (expect_true (
1464 cctx_current->idle_sp == STACKLEVEL
1465 && !(cctx_current->flags & CC_TRACE)
1466 && !force_cctx
1467 ))
1029 { 1468 {
1030 /* coroutine already started */ 1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1031 save_perl (aTHX_ prev); 1470 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1032 load_perl (aTHX_ next); 1471
1472 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1473 /* without this the next cctx_get might destroy the running cctx while still in use */
1474 if (expect_false (CCTX_EXPIRED (cctx_current)))
1475 if (expect_true (!next->cctx))
1476 next->cctx = cctx_get (aTHX);
1477
1478 cctx_put (cctx_current);
1033 } 1479 }
1480 else
1481 prev->cctx = cctx_current;
1034 1482
1035 prev__cctx = prev->cctx; 1483 ++next->usecount;
1036 1484
1037 /* possibly "free" the cctx */ 1485 cctx_prev = cctx_current;
1038 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1486 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1487
1488 next->cctx = 0;
1489
1490 if (expect_false (cctx_prev != cctx_current))
1039 { 1491 {
1040 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1492 cctx_prev->top_env = PL_top_env;
1041 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1493 PL_top_env = cctx_current->top_env;
1042 1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1043 prev->cctx = 0;
1044
1045 cctx_put (prev__cctx);
1046 } 1495 }
1047 1496
1048 ++next->usecount; 1497 transfer_tail (aTHX);
1049
1050 if (!next->cctx)
1051 next->cctx = cctx_get (aTHX);
1052
1053 if (prev__cctx != next->cctx)
1054 {
1055 prev__cctx->top_env = PL_top_env;
1056 PL_top_env = next->cctx->top_env;
1057 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1058 }
1059
1060 free_coro_mortal (aTHX);
1061 UNLOCK;
1062 } 1498 }
1063} 1499}
1064 1500
1065struct transfer_args
1066{
1067 struct coro *prev, *next;
1068};
1069
1070#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1501#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1071#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1502#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1072 1503
1073/** high level stuff ********************************************************/ 1504/** high level stuff ********************************************************/
1074 1505
1075static int 1506static int
1076coro_state_destroy (pTHX_ struct coro *coro) 1507coro_state_destroy (pTHX_ struct coro *coro)
1077{ 1508{
1078 if (coro->flags & CF_DESTROYED) 1509 if (coro->flags & CF_DESTROYED)
1079 return 0; 1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1080 1514
1081 coro->flags |= CF_DESTROYED; 1515 coro->flags |= CF_DESTROYED;
1082 1516
1083 if (coro->flags & CF_READY) 1517 if (coro->flags & CF_READY)
1084 { 1518 {
1085 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1086 /* alternative: look through all ready queues and remove the coro */ 1520 /* alternative: look through all ready queues and remove the coro */
1087 LOCK;
1088 --coro_nready; 1521 --coro_nready;
1089 UNLOCK;
1090 } 1522 }
1091 else 1523 else
1092 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1524 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1093 1525
1094 if (coro->mainstack && coro->mainstack != main_mainstack) 1526 if (coro->mainstack
1095 { 1527 && coro->mainstack != main_mainstack
1096 struct coro temp; 1528 && coro->slot
1097 1529 && !PL_dirty)
1098 if (coro->flags & CF_RUNNING)
1099 croak ("FATAL: tried to destroy currently running coroutine");
1100
1101 save_perl (aTHX_ &temp);
1102 load_perl (aTHX_ coro);
1103
1104 coro_destroy (aTHX_ coro); 1530 coro_destruct_perl (aTHX_ coro);
1105
1106 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1107
1108 coro->mainstack = 0;
1109 }
1110 1531
1111 cctx_destroy (coro->cctx); 1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1112 SvREFCNT_dec (coro->args); 1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1113 1536
1114 if (coro->next) coro->next->prev = coro->prev; 1537 if (coro->next) coro->next->prev = coro->prev;
1115 if (coro->prev) coro->prev->next = coro->next; 1538 if (coro->prev) coro->prev->next = coro->next;
1116 if (coro == coro_first) coro_first = coro->next; 1539 if (coro == coro_first) coro_first = coro->next;
1117 1540
… …
1155# define MGf_DUP 0 1578# define MGf_DUP 0
1156#endif 1579#endif
1157}; 1580};
1158 1581
1159static void 1582static void
1160prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1583prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1161{ 1584{
1162 ta->prev = SvSTATE (prev_sv); 1585 ta->prev = SvSTATE (prev_sv);
1163 ta->next = SvSTATE (next_sv); 1586 ta->next = SvSTATE (next_sv);
1164 TRANSFER_CHECK (*ta); 1587 TRANSFER_CHECK (*ta);
1165} 1588}
1166 1589
1167static void 1590static void
1168api_transfer (SV *prev_sv, SV *next_sv) 1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1169{ 1592{
1170 dTHX;
1171 struct transfer_args ta; 1593 struct coro_transfer_args ta;
1172 1594
1173 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1174 TRANSFER (ta); 1596 TRANSFER (ta, 1);
1597}
1598
1599/*****************************************************************************/
1600/* gensub: simple closure generation utility */
1601
1602#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1603
1604/* create a closure from XS, returns a code reference */
1605/* the arg can be accessed via GENSUB_ARG from the callback */
1606/* the callback must use dXSARGS/XSRETURN */
1607static SV *
1608gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1609{
1610 CV *cv = (CV *)newSV (0);
1611
1612 sv_upgrade ((SV *)cv, SVt_PVCV);
1613
1614 CvANON_on (cv);
1615 CvISXSUB_on (cv);
1616 CvXSUB (cv) = xsub;
1617 GENSUB_ARG = arg;
1618
1619 return newRV_noinc ((SV *)cv);
1175} 1620}
1176 1621
1177/** Coro ********************************************************************/ 1622/** Coro ********************************************************************/
1178 1623
1179static void 1624INLINE void
1180coro_enq (pTHX_ SV *coro_sv) 1625coro_enq (pTHX_ struct coro *coro)
1181{ 1626{
1182 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1183}
1184 1628
1185static SV * 1629 SvREFCNT_inc_NN (coro->hv);
1186coro_deq (pTHX_ int min_prio)
1187{
1188 int prio = PRIO_MAX - PRIO_MIN;
1189 1630
1190 min_prio -= PRIO_MIN; 1631 coro->next_ready = 0;
1191 if (min_prio < 0) 1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1192 min_prio = 0; 1633 ready [1] = coro;
1634}
1193 1635
1636INLINE struct coro *
1637coro_deq (pTHX)
1638{
1639 int prio;
1640
1194 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1195 if (AvFILLp (coro_ready [prio]) >= 0) 1642 {
1196 return av_shift (coro_ready [prio]); 1643 struct coro **ready = coro_ready [prio];
1644
1645 if (ready [0])
1646 {
1647 struct coro *coro = ready [0];
1648 ready [0] = coro->next_ready;
1649 return coro;
1650 }
1651 }
1197 1652
1198 return 0; 1653 return 0;
1199} 1654}
1200 1655
1201static int 1656static int
1202api_ready (SV *coro_sv) 1657api_ready (pTHX_ SV *coro_sv)
1203{ 1658{
1204 dTHX;
1205 struct coro *coro; 1659 struct coro *coro;
1206 1660 SV *sv_hook;
1207 if (SvROK (coro_sv)) 1661 void (*xs_hook)(void);
1208 coro_sv = SvRV (coro_sv);
1209 1662
1210 coro = SvSTATE (coro_sv); 1663 coro = SvSTATE (coro_sv);
1211 1664
1212 if (coro->flags & CF_READY) 1665 if (coro->flags & CF_READY)
1213 return 0; 1666 return 0;
1214 1667
1215 coro->flags |= CF_READY; 1668 coro->flags |= CF_READY;
1216 1669
1217 LOCK; 1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1218 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1672
1673 coro_enq (aTHX_ coro);
1219 ++coro_nready; 1674 ++coro_nready;
1220 UNLOCK; 1675
1676 if (sv_hook)
1677 {
1678 dSP;
1679
1680 ENTER;
1681 SAVETMPS;
1682
1683 PUSHMARK (SP);
1684 PUTBACK;
1685 call_sv (sv_hook, G_VOID | G_DISCARD);
1686
1687 FREETMPS;
1688 LEAVE;
1689 }
1690
1691 if (xs_hook)
1692 xs_hook ();
1221 1693
1222 return 1; 1694 return 1;
1223} 1695}
1224 1696
1225static int 1697static int
1226api_is_ready (SV *coro_sv) 1698api_is_ready (pTHX_ SV *coro_sv)
1227{ 1699{
1228 dTHX;
1229 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1230} 1701}
1231 1702
1232static void 1703/* expects to own a reference to next->hv */
1704INLINE void
1233prepare_schedule (pTHX_ struct transfer_args *ta) 1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1234{ 1706{
1235 SV *prev_sv, *next_sv;
1236
1237 for (;;)
1238 {
1239 LOCK;
1240 next_sv = coro_deq (aTHX_ PRIO_MIN);
1241
1242 /* nothing to schedule: call the idle handler */
1243 if (!next_sv)
1244 {
1245 dSP;
1246 UNLOCK;
1247
1248 ENTER;
1249 SAVETMPS;
1250
1251 PUSHMARK (SP);
1252 PUTBACK;
1253 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1254
1255 FREETMPS;
1256 LEAVE;
1257 continue;
1258 }
1259
1260 ta->next = SvSTATE (next_sv);
1261
1262 /* cannot transfer to destroyed coros, skip and look for next */
1263 if (ta->next->flags & CF_DESTROYED)
1264 {
1265 UNLOCK;
1266 SvREFCNT_dec (next_sv);
1267 /* coro_nready is already taken care of by destroy */
1268 continue;
1269 }
1270
1271 --coro_nready;
1272 UNLOCK;
1273 break;
1274 }
1275
1276 /* free this only after the transfer */
1277 prev_sv = SvRV (coro_current); 1707 SV *prev_sv = SvRV (coro_current);
1708
1278 ta->prev = SvSTATE (prev_sv); 1709 ta->prev = SvSTATE_hv (prev_sv);
1710 ta->next = next;
1711
1279 TRANSFER_CHECK (*ta); 1712 TRANSFER_CHECK (*ta);
1280 assert (ta->next->flags & CF_READY); 1713
1281 ta->next->flags &= ~CF_READY;
1282 SvRV_set (coro_current, next_sv); 1714 SvRV_set (coro_current, (SV *)next->hv);
1283 1715
1284 LOCK;
1285 free_coro_mortal (aTHX); 1716 free_coro_mortal (aTHX);
1286 coro_mortal = prev_sv; 1717 coro_mortal = prev_sv;
1287 UNLOCK;
1288} 1718}
1289 1719
1290static void 1720static void
1721prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1722{
1723 for (;;)
1724 {
1725 struct coro *next = coro_deq (aTHX);
1726
1727 if (expect_true (next))
1728 {
1729 /* cannot transfer to destroyed coros, skip and look for next */
1730 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1731 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1732 else
1733 {
1734 next->flags &= ~CF_READY;
1735 --coro_nready;
1736
1737 prepare_schedule_to (aTHX_ ta, next);
1738 break;
1739 }
1740 }
1741 else
1742 {
1743 /* nothing to schedule: call the idle handler */
1744 if (SvROK (sv_idle)
1745 && SvOBJECT (SvRV (sv_idle)))
1746 {
1747 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1748 api_ready (aTHX_ SvRV (sv_idle));
1749 --coro_nready;
1750 }
1751 else
1752 {
1753 dSP;
1754
1755 ENTER;
1756 SAVETMPS;
1757
1758 PUSHMARK (SP);
1759 PUTBACK;
1760 call_sv (sv_idle, G_VOID | G_DISCARD);
1761
1762 FREETMPS;
1763 LEAVE;
1764 }
1765 }
1766 }
1767}
1768
1769INLINE void
1291prepare_cede (pTHX_ struct transfer_args *ta) 1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1292{ 1771{
1293 api_ready (coro_current); 1772 api_ready (aTHX_ coro_current);
1294 prepare_schedule (aTHX_ ta); 1773 prepare_schedule (aTHX_ ta);
1295} 1774}
1296 1775
1776INLINE void
1777prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1778{
1779 SV *prev = SvRV (coro_current);
1780
1781 if (coro_nready)
1782 {
1783 prepare_schedule (aTHX_ ta);
1784 api_ready (aTHX_ prev);
1785 }
1786 else
1787 prepare_nop (aTHX_ ta);
1788}
1789
1790static void
1791api_schedule (pTHX)
1792{
1793 struct coro_transfer_args ta;
1794
1795 prepare_schedule (aTHX_ &ta);
1796 TRANSFER (ta, 1);
1797}
1798
1799static void
1800api_schedule_to (pTHX_ SV *coro_sv)
1801{
1802 struct coro_transfer_args ta;
1803 struct coro *next = SvSTATE (coro_sv);
1804
1805 SvREFCNT_inc_NN (coro_sv);
1806 prepare_schedule_to (aTHX_ &ta, next);
1807}
1808
1297static int 1809static int
1298prepare_cede_notself (pTHX_ struct transfer_args *ta) 1810api_cede (pTHX)
1299{ 1811{
1300 if (coro_nready) 1812 struct coro_transfer_args ta;
1301 { 1813
1302 SV *prev = SvRV (coro_current);
1303 prepare_schedule (aTHX_ ta); 1814 prepare_cede (aTHX_ &ta);
1304 api_ready (prev); 1815
1816 if (expect_true (ta.prev != ta.next))
1817 {
1818 TRANSFER (ta, 1);
1305 return 1; 1819 return 1;
1306 } 1820 }
1307 else 1821 else
1308 return 0; 1822 return 0;
1309} 1823}
1310 1824
1311static void
1312api_schedule (void)
1313{
1314 dTHX;
1315 struct transfer_args ta;
1316
1317 prepare_schedule (aTHX_ &ta);
1318 TRANSFER (ta);
1319}
1320
1321static int 1825static int
1322api_cede (void) 1826api_cede_notself (pTHX)
1323{ 1827{
1324 dTHX; 1828 if (coro_nready)
1829 {
1325 struct transfer_args ta; 1830 struct coro_transfer_args ta;
1326 1831
1327 prepare_cede (aTHX_ &ta); 1832 prepare_cede_notself (aTHX_ &ta);
1328
1329 if (ta.prev != ta.next)
1330 {
1331 TRANSFER (ta); 1833 TRANSFER (ta, 1);
1332 return 1; 1834 return 1;
1333 } 1835 }
1334 else 1836 else
1335 return 0; 1837 return 0;
1336} 1838}
1337 1839
1338static int 1840static void
1339api_cede_notself (void)
1340{
1341 dTHX;
1342 struct transfer_args ta;
1343
1344 if (prepare_cede_notself (aTHX_ &ta))
1345 {
1346 TRANSFER (ta);
1347 return 1;
1348 }
1349 else
1350 return 0;
1351}
1352
1353static void
1354api_trace (SV *coro_sv, int flags) 1841api_trace (pTHX_ SV *coro_sv, int flags)
1355{ 1842{
1356 dTHX;
1357 struct coro *coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1358 1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1847
1359 if (flags & CC_TRACE) 1848 if (flags & CC_TRACE)
1360 { 1849 {
1361 if (!coro->cctx) 1850 if (!coro->cctx)
1362 coro->cctx = cctx_new (); 1851 coro->cctx = cctx_new_run ();
1363 else if (!(coro->cctx->flags & CC_TRACE)) 1852 else if (!(coro->cctx->flags & CC_TRACE))
1364 croak ("cannot enable tracing on coroutine with custom stack"); 1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1365 1854
1366 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1367 } 1856 }
1368 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1369 { 1858 {
1370 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1859 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1371 1860
1372 if (coro->flags & CF_RUNNING) 1861 if (coro->flags & CF_RUNNING)
1373 PL_runops = RUNOPS_DEFAULT; 1862 PL_runops = RUNOPS_DEFAULT;
1374 else 1863 else
1375 coro->runops = RUNOPS_DEFAULT; 1864 coro->slot->runops = RUNOPS_DEFAULT;
1865 }
1866}
1867
1868static void
1869coro_call_on_destroy (pTHX_ struct coro *coro)
1870{
1871 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1872 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1873
1874 if (on_destroyp)
1875 {
1876 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1877
1878 while (AvFILLp (on_destroy) >= 0)
1879 {
1880 dSP; /* don't disturb outer sp */
1881 SV *cb = av_pop (on_destroy);
1882
1883 PUSHMARK (SP);
1884
1885 if (statusp)
1886 {
1887 int i;
1888 AV *status = (AV *)SvRV (*statusp);
1889 EXTEND (SP, AvFILLp (status) + 1);
1890
1891 for (i = 0; i <= AvFILLp (status); ++i)
1892 PUSHs (AvARRAY (status)[i]);
1893 }
1894
1895 PUTBACK;
1896 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1897 }
1898 }
1899}
1900
1901static void
1902slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 int i;
1905 HV *hv = (HV *)SvRV (coro_current);
1906 AV *av = newAV ();
1907
1908 av_extend (av, items - 1);
1909 for (i = 0; i < items; ++i)
1910 av_push (av, SvREFCNT_inc_NN (arg [i]));
1911
1912 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1913
1914 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1915 api_ready (aTHX_ sv_manager);
1916
1917 frame->prepare = prepare_schedule;
1918 frame->check = slf_check_repeat;
1919
1920 /* as a minor optimisation, we could unwind all stacks here */
1921 /* but that puts extra pressure on pp_slf, and is not worth much */
1922 /*coro_unwind_stacks (aTHX);*/
1923}
1924
1925/*****************************************************************************/
1926/* async pool handler */
1927
1928static int
1929slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1930{
1931 HV *hv = (HV *)SvRV (coro_current);
1932 struct coro *coro = (struct coro *)frame->data;
1933
1934 if (!coro->invoke_cb)
1935 return 1; /* loop till we have invoke */
1936 else
1937 {
1938 hv_store (hv, "desc", sizeof ("desc") - 1,
1939 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1940
1941 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1942
1943 {
1944 dSP;
1945 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1946 PUTBACK;
1376 } 1947 }
1948
1949 SvREFCNT_dec (GvAV (PL_defgv));
1950 GvAV (PL_defgv) = coro->invoke_av;
1951 coro->invoke_av = 0;
1952
1953 return 0;
1954 }
1377} 1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
2058
2059 return 0;
2060}
2061
2062static void
2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 SV *cb;
2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
2400
2401/*****************************************************************************/
2402/* PerlIO::cede */
2403
2404typedef struct
2405{
2406 PerlIOBuf base;
2407 NV next, every;
2408} PerlIOCede;
2409
2410static IV
2411PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2412{
2413 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2414
2415 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2416 self->next = nvtime () + self->every;
2417
2418 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2419}
2420
2421static SV *
2422PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2423{
2424 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2425
2426 return newSVnv (self->every);
2427}
2428
2429static IV
2430PerlIOCede_flush (pTHX_ PerlIO *f)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433 double now = nvtime ();
2434
2435 if (now >= self->next)
2436 {
2437 api_cede (aTHX);
2438 self->next = now + self->every;
2439 }
2440
2441 return PerlIOBuf_flush (aTHX_ f);
2442}
2443
2444static PerlIO_funcs PerlIO_cede =
2445{
2446 sizeof(PerlIO_funcs),
2447 "cede",
2448 sizeof(PerlIOCede),
2449 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2450 PerlIOCede_pushed,
2451 PerlIOBuf_popped,
2452 PerlIOBuf_open,
2453 PerlIOBase_binmode,
2454 PerlIOCede_getarg,
2455 PerlIOBase_fileno,
2456 PerlIOBuf_dup,
2457 PerlIOBuf_read,
2458 PerlIOBuf_unread,
2459 PerlIOBuf_write,
2460 PerlIOBuf_seek,
2461 PerlIOBuf_tell,
2462 PerlIOBuf_close,
2463 PerlIOCede_flush,
2464 PerlIOBuf_fill,
2465 PerlIOBase_eof,
2466 PerlIOBase_error,
2467 PerlIOBase_clearerr,
2468 PerlIOBase_setlinebuf,
2469 PerlIOBuf_get_base,
2470 PerlIOBuf_bufsiz,
2471 PerlIOBuf_get_ptr,
2472 PerlIOBuf_get_cnt,
2473 PerlIOBuf_set_ptrcnt,
2474};
2475
2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
2478
2479static SV *
2480coro_waitarray_new (pTHX_ int count)
2481{
2482 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 api_ready (aTHX_ cb);
2671 sv_setiv (cb, 0); /* signal waiter */
2672 SvREFCNT_dec (cb);
2673
2674 --count;
2675 }
2676}
2677
2678static int
2679slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2680{
2681 /* if we are about to throw, also stop waiting */
2682 return SvROK ((SV *)frame->data) && !CORO_THROW;
2683}
2684
2685static void
2686slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2687{
2688 AV *av = (AV *)SvRV (arg [0]);
2689
2690 if (SvIVX (AvARRAY (av)[0]))
2691 {
2692 SvIVX (AvARRAY (av)[0]) = 0;
2693 frame->prepare = prepare_nop;
2694 frame->check = slf_check_nop;
2695 }
2696 else
2697 {
2698 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2699
2700 av_push (av, waiter);
2701
2702 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2703 frame->prepare = prepare_schedule;
2704 frame->check = slf_check_signal_wait;
2705 }
2706}
2707
2708/*****************************************************************************/
2709/* Coro::AIO */
2710
2711#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2712
2713/* helper storage struct */
2714struct io_state
2715{
2716 int errorno;
2717 I32 laststype; /* U16 in 5.10.0 */
2718 int laststatval;
2719 Stat_t statcache;
2720};
2721
2722static void
2723coro_aio_callback (pTHX_ CV *cv)
2724{
2725 dXSARGS;
2726 AV *state = (AV *)GENSUB_ARG;
2727 SV *coro = av_pop (state);
2728 SV *data_sv = newSV (sizeof (struct io_state));
2729
2730 av_extend (state, items - 1);
2731
2732 sv_upgrade (data_sv, SVt_PV);
2733 SvCUR_set (data_sv, sizeof (struct io_state));
2734 SvPOK_only (data_sv);
2735
2736 {
2737 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2738
2739 data->errorno = errno;
2740 data->laststype = PL_laststype;
2741 data->laststatval = PL_laststatval;
2742 data->statcache = PL_statcache;
2743 }
2744
2745 /* now build the result vector out of all the parameters and the data_sv */
2746 {
2747 int i;
2748
2749 for (i = 0; i < items; ++i)
2750 av_push (state, SvREFCNT_inc_NN (ST (i)));
2751 }
2752
2753 av_push (state, data_sv);
2754
2755 api_ready (aTHX_ coro);
2756 SvREFCNT_dec (coro);
2757 SvREFCNT_dec ((AV *)state);
2758}
2759
2760static int
2761slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2762{
2763 AV *state = (AV *)frame->data;
2764
2765 /* if we are about to throw, return early */
2766 /* this does not cancel the aio request, but at least */
2767 /* it quickly returns */
2768 if (CORO_THROW)
2769 return 0;
2770
2771 /* one element that is an RV? repeat! */
2772 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2773 return 1;
2774
2775 /* restore status */
2776 {
2777 SV *data_sv = av_pop (state);
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 errno = data->errorno;
2781 PL_laststype = data->laststype;
2782 PL_laststatval = data->laststatval;
2783 PL_statcache = data->statcache;
2784
2785 SvREFCNT_dec (data_sv);
2786 }
2787
2788 /* push result values */
2789 {
2790 dSP;
2791 int i;
2792
2793 EXTEND (SP, AvFILLp (state) + 1);
2794 for (i = 0; i <= AvFILLp (state); ++i)
2795 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2796
2797 PUTBACK;
2798 }
2799
2800 return 0;
2801}
2802
2803static void
2804slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2805{
2806 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2807 SV *coro_hv = SvRV (coro_current);
2808 struct coro *coro = SvSTATE_hv (coro_hv);
2809
2810 /* put our coroutine id on the state arg */
2811 av_push (state, SvREFCNT_inc_NN (coro_hv));
2812
2813 /* first see whether we have a non-zero priority and set it as AIO prio */
2814 if (coro->prio)
2815 {
2816 dSP;
2817
2818 static SV *prio_cv;
2819 static SV *prio_sv;
2820
2821 if (expect_false (!prio_cv))
2822 {
2823 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2824 prio_sv = newSViv (0);
2825 }
2826
2827 PUSHMARK (SP);
2828 sv_setiv (prio_sv, coro->prio);
2829 XPUSHs (prio_sv);
2830
2831 PUTBACK;
2832 call_sv (prio_cv, G_VOID | G_DISCARD);
2833 }
2834
2835 /* now call the original request */
2836 {
2837 dSP;
2838 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2839 int i;
2840
2841 PUSHMARK (SP);
2842
2843 /* first push all args to the stack */
2844 EXTEND (SP, items + 1);
2845
2846 for (i = 0; i < items; ++i)
2847 PUSHs (arg [i]);
2848
2849 /* now push the callback closure */
2850 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2851
2852 /* now call the AIO function - we assume our request is uncancelable */
2853 PUTBACK;
2854 call_sv ((SV *)req, G_VOID | G_DISCARD);
2855 }
2856
2857 /* now that the requets is going, we loop toll we have a result */
2858 frame->data = (void *)state;
2859 frame->prepare = prepare_schedule;
2860 frame->check = slf_check_aio_req;
2861}
2862
2863static void
2864coro_aio_req_xs (pTHX_ CV *cv)
2865{
2866 dXSARGS;
2867
2868 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2869
2870 XSRETURN_EMPTY;
2871}
2872
2873/*****************************************************************************/
2874
2875#if CORO_CLONE
2876# include "clone.c"
2877#endif
1378 2878
1379MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2879MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1380 2880
1381PROTOTYPES: DISABLE 2881PROTOTYPES: DISABLE
1382 2882
1383BOOT: 2883BOOT:
1384{ 2884{
1385#ifdef USE_ITHREADS 2885#ifdef USE_ITHREADS
1386 MUTEX_INIT (&coro_mutex); 2886# if CORO_PTHREAD
2887 coro_thx = PERL_GET_CONTEXT;
2888# endif
1387#endif 2889#endif
1388 BOOT_PAGESIZE; 2890 BOOT_PAGESIZE;
1389 2891
2892 cctx_current = cctx_new_empty ();
2893
1390 irsgv = gv_fetchpv ("/", 1, SVt_PV); 2894 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2895 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2896
2897 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2898 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2899 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2900
2901 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2902 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2903 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1391 2904
1392 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2905 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1393 2906
1394 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2907 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1395 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2908 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1400 main_top_env = PL_top_env; 2913 main_top_env = PL_top_env;
1401 2914
1402 while (main_top_env->je_prev) 2915 while (main_top_env->je_prev)
1403 main_top_env = main_top_env->je_prev; 2916 main_top_env = main_top_env->je_prev;
1404 2917
2918 {
2919 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2920
2921 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2922 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2923
2924 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2925 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2926 }
2927
1405 coroapi.ver = CORO_API_VERSION; 2928 coroapi.ver = CORO_API_VERSION;
2929 coroapi.rev = CORO_API_REVISION;
2930
1406 coroapi.transfer = api_transfer; 2931 coroapi.transfer = api_transfer;
2932
2933 coroapi.sv_state = SvSTATE_;
2934 coroapi.execute_slf = api_execute_slf;
2935 coroapi.prepare_nop = prepare_nop;
2936 coroapi.prepare_schedule = prepare_schedule;
2937 coroapi.prepare_cede = prepare_cede;
2938 coroapi.prepare_cede_notself = prepare_cede_notself;
2939
2940 {
2941 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2942
2943 if (!svp) croak ("Time::HiRes is required");
2944 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2945
2946 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2947 }
1407 2948
1408 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2949 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1409} 2950}
1410 2951
1411SV * 2952SV *
1412new (char *klass, ...) 2953new (char *klass, ...)
2954 ALIAS:
2955 Coro::new = 1
1413 CODE: 2956 CODE:
1414{ 2957{
1415 struct coro *coro; 2958 struct coro *coro;
2959 MAGIC *mg;
1416 HV *hv; 2960 HV *hv;
2961 CV *cb;
1417 int i; 2962 int i;
2963
2964 if (items > 1)
2965 {
2966 cb = coro_sv_2cv (aTHX_ ST (1));
2967
2968 if (!ix)
2969 {
2970 if (CvISXSUB (cb))
2971 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2972
2973 if (!CvROOT (cb))
2974 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2975 }
2976 }
1418 2977
1419 Newz (0, coro, 1, struct coro); 2978 Newz (0, coro, 1, struct coro);
1420 coro->args = newAV (); 2979 coro->args = newAV ();
1421 coro->flags = CF_NEW; 2980 coro->flags = CF_NEW;
1422 2981
1423 if (coro_first) coro_first->prev = coro; 2982 if (coro_first) coro_first->prev = coro;
1424 coro->next = coro_first; 2983 coro->next = coro_first;
1425 coro_first = coro; 2984 coro_first = coro;
1426 2985
1427 coro->hv = hv = newHV (); 2986 coro->hv = hv = newHV ();
1428 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2987 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2988 mg->mg_flags |= MGf_DUP;
1429 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2989 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1430 2990
2991 if (items > 1)
2992 {
2993 av_extend (coro->args, items - 1 + ix - 1);
2994
2995 if (ix)
2996 {
2997 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2998 cb = cv_coro_run;
2999 }
3000
3001 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3002
1431 for (i = 1; i < items; i++) 3003 for (i = 2; i < items; i++)
1432 av_push (coro->args, newSVsv (ST (i))); 3004 av_push (coro->args, newSVsv (ST (i)));
3005 }
1433} 3006}
1434 OUTPUT: 3007 OUTPUT:
1435 RETVAL 3008 RETVAL
1436 3009
1437# these not obviously related functions are all rolled into the same xs
1438# function to increase chances that they all will call transfer with the same
1439# stack offset
1440void 3010void
1441_set_stacklevel (...) 3011transfer (...)
1442 ALIAS: 3012 PROTOTYPE: $$
1443 Coro::State::transfer = 1 3013 CODE:
1444 Coro::schedule = 2 3014 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1445 Coro::cede = 3
1446 Coro::cede_notself = 4
1447 CODE:
1448{
1449 struct transfer_args ta;
1450
1451 switch (ix)
1452 {
1453 case 0:
1454 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1455 ta.next = 0;
1456 break;
1457
1458 case 1:
1459 if (items != 2)
1460 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1461
1462 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1463 break;
1464
1465 case 2:
1466 prepare_schedule (aTHX_ &ta);
1467 break;
1468
1469 case 3:
1470 prepare_cede (aTHX_ &ta);
1471 break;
1472
1473 case 4:
1474 if (!prepare_cede_notself (aTHX_ &ta))
1475 XSRETURN_EMPTY;
1476
1477 break;
1478 }
1479
1480 BARRIER;
1481 TRANSFER (ta);
1482
1483 if (GIMME_V != G_VOID && ta.next != ta.prev)
1484 XSRETURN_YES;
1485}
1486 3015
1487bool 3016bool
1488_destroy (SV *coro_sv) 3017_destroy (SV *coro_sv)
1489 CODE: 3018 CODE:
1490 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3019 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1491 OUTPUT: 3020 OUTPUT:
1492 RETVAL 3021 RETVAL
1493 3022
1494void 3023void
1495_exit (code) 3024_exit (int code)
1496 int code
1497 PROTOTYPE: $ 3025 PROTOTYPE: $
1498 CODE: 3026 CODE:
1499 _exit (code); 3027 _exit (code);
1500 3028
3029SV *
3030clone (Coro::State coro)
3031 CODE:
3032{
3033#if CORO_CLONE
3034 struct coro *ncoro = coro_clone (aTHX_ coro);
3035 MAGIC *mg;
3036 /* TODO: too much duplication */
3037 ncoro->hv = newHV ();
3038 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3039 mg->mg_flags |= MGf_DUP;
3040 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3041#else
3042 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3043#endif
3044}
3045 OUTPUT:
3046 RETVAL
3047
1501int 3048int
1502cctx_stacksize (int new_stacksize = 0) 3049cctx_stacksize (int new_stacksize = 0)
3050 PROTOTYPE: ;$
1503 CODE: 3051 CODE:
1504 RETVAL = coro_stacksize; 3052 RETVAL = cctx_stacksize;
1505 if (new_stacksize) 3053 if (new_stacksize)
3054 {
1506 coro_stacksize = new_stacksize; 3055 cctx_stacksize = new_stacksize;
3056 ++cctx_gen;
3057 }
1507 OUTPUT: 3058 OUTPUT:
1508 RETVAL 3059 RETVAL
1509 3060
1510int 3061int
3062cctx_max_idle (int max_idle = 0)
3063 PROTOTYPE: ;$
3064 CODE:
3065 RETVAL = cctx_max_idle;
3066 if (max_idle > 1)
3067 cctx_max_idle = max_idle;
3068 OUTPUT:
3069 RETVAL
3070
3071int
1511cctx_count () 3072cctx_count ()
3073 PROTOTYPE:
1512 CODE: 3074 CODE:
1513 RETVAL = cctx_count; 3075 RETVAL = cctx_count;
1514 OUTPUT: 3076 OUTPUT:
1515 RETVAL 3077 RETVAL
1516 3078
1517int 3079int
1518cctx_idle () 3080cctx_idle ()
3081 PROTOTYPE:
1519 CODE: 3082 CODE:
1520 RETVAL = cctx_idle; 3083 RETVAL = cctx_idle;
1521 OUTPUT: 3084 OUTPUT:
1522 RETVAL 3085 RETVAL
1523 3086
1524void 3087void
1525list () 3088list ()
3089 PROTOTYPE:
1526 PPCODE: 3090 PPCODE:
1527{ 3091{
1528 struct coro *coro; 3092 struct coro *coro;
1529 for (coro = coro_first; coro; coro = coro->next) 3093 for (coro = coro_first; coro; coro = coro->next)
1530 if (coro->hv) 3094 if (coro->hv)
… …
1535call (Coro::State coro, SV *coderef) 3099call (Coro::State coro, SV *coderef)
1536 ALIAS: 3100 ALIAS:
1537 eval = 1 3101 eval = 1
1538 CODE: 3102 CODE:
1539{ 3103{
1540 if (coro->mainstack) 3104 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1541 { 3105 {
1542 struct coro temp; 3106 struct coro *current = SvSTATE_current;
1543 Zero (&temp, 1, struct coro);
1544 3107
1545 if (!(coro->flags & CF_RUNNING)) 3108 if (current != coro)
1546 { 3109 {
3110 PUTBACK;
1547 save_perl (aTHX_ &temp); 3111 save_perl (aTHX_ current);
1548 load_perl (aTHX_ coro); 3112 load_perl (aTHX_ coro);
3113 SPAGAIN;
1549 } 3114 }
1550 3115
1551 { 3116 PUSHSTACK;
1552 dSP; 3117
1553 ENTER;
1554 SAVETMPS;
1555 PUSHMARK (SP); 3118 PUSHMARK (SP);
1556 PUTBACK; 3119 PUTBACK;
3120
1557 if (ix) 3121 if (ix)
1558 eval_sv (coderef, 0); 3122 eval_sv (coderef, 0);
1559 else 3123 else
1560 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3124 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3125
3126 POPSTACK;
1561 SPAGAIN; 3127 SPAGAIN;
1562 FREETMPS;
1563 LEAVE;
1564 PUTBACK;
1565 }
1566 3128
1567 if (!(coro->flags & CF_RUNNING)) 3129 if (current != coro)
1568 { 3130 {
3131 PUTBACK;
1569 save_perl (aTHX_ coro); 3132 save_perl (aTHX_ coro);
1570 load_perl (aTHX_ &temp); 3133 load_perl (aTHX_ current);
3134 SPAGAIN;
1571 } 3135 }
1572 } 3136 }
1573} 3137}
1574 3138
1575SV * 3139SV *
… …
1578 ALIAS: 3142 ALIAS:
1579 is_ready = CF_READY 3143 is_ready = CF_READY
1580 is_running = CF_RUNNING 3144 is_running = CF_RUNNING
1581 is_new = CF_NEW 3145 is_new = CF_NEW
1582 is_destroyed = CF_DESTROYED 3146 is_destroyed = CF_DESTROYED
3147 is_suspended = CF_SUSPENDED
1583 CODE: 3148 CODE:
1584 RETVAL = boolSV (coro->flags & ix); 3149 RETVAL = boolSV (coro->flags & ix);
1585 OUTPUT: 3150 OUTPUT:
1586 RETVAL 3151 RETVAL
1587 3152
1588void 3153void
3154throw (Coro::State self, SV *throw = &PL_sv_undef)
3155 PROTOTYPE: $;$
3156 CODE:
3157{
3158 struct coro *current = SvSTATE_current;
3159 SV **throwp = self == current ? &CORO_THROW : &self->except;
3160 SvREFCNT_dec (*throwp);
3161 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3162}
3163
3164void
1589api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3165api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3166 PROTOTYPE: $;$
3167 C_ARGS: aTHX_ coro, flags
1590 3168
1591SV * 3169SV *
1592has_stack (Coro::State coro) 3170has_cctx (Coro::State coro)
1593 PROTOTYPE: $ 3171 PROTOTYPE: $
1594 CODE: 3172 CODE:
1595 RETVAL = boolSV (!!coro->cctx); 3173 /* maybe manage the running flag differently */
3174 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1596 OUTPUT: 3175 OUTPUT:
1597 RETVAL 3176 RETVAL
1598 3177
1599int 3178int
1600is_traced (Coro::State coro) 3179is_traced (Coro::State coro)
… …
1602 CODE: 3181 CODE:
1603 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3182 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1604 OUTPUT: 3183 OUTPUT:
1605 RETVAL 3184 RETVAL
1606 3185
1607IV 3186UV
1608rss (Coro::State coro) 3187rss (Coro::State coro)
1609 PROTOTYPE: $ 3188 PROTOTYPE: $
1610 ALIAS: 3189 ALIAS:
1611 usecount = 1 3190 usecount = 1
1612 CODE: 3191 CODE:
… …
1616 case 1: RETVAL = coro->usecount; break; 3195 case 1: RETVAL = coro->usecount; break;
1617 } 3196 }
1618 OUTPUT: 3197 OUTPUT:
1619 RETVAL 3198 RETVAL
1620 3199
3200void
3201force_cctx ()
3202 PROTOTYPE:
3203 CODE:
3204 cctx_current->idle_sp = 0;
3205
3206void
3207swap_defsv (Coro::State self)
3208 PROTOTYPE: $
3209 ALIAS:
3210 swap_defav = 1
3211 CODE:
3212 if (!self->slot)
3213 croak ("cannot swap state with coroutine that has no saved state,");
3214 else
3215 {
3216 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3217 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3218
3219 SV *tmp = *src; *src = *dst; *dst = tmp;
3220 }
3221
3222void
3223cancel (Coro::State self)
3224 CODE:
3225 coro_state_destroy (aTHX_ self);
3226 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3227
1621 3228
1622MODULE = Coro::State PACKAGE = Coro 3229MODULE = Coro::State PACKAGE = Coro
1623 3230
1624BOOT: 3231BOOT:
1625{ 3232{
1626 int i;
1627
1628 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3233 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1629 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3234 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3235 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3236 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3237 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1630 av_async_pool = get_av ("Coro::async_pool", TRUE); 3238 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3239 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3240 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3241 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1631 3242
1632 coro_current = get_sv ("Coro::current", FALSE); 3243 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1633 SvREADONLY_on (coro_current); 3244 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3245 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3246 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1634 3247
1635 coro_stash = gv_stashpv ("Coro", TRUE); 3248 coro_stash = gv_stashpv ("Coro", TRUE);
1636 3249
1637 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3250 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1638 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3251 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1639 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3252 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1640 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3253 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1641 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3254 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1642 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3255 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1643 3256
1644 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1645 coro_ready[i] = newAV ();
1646
1647 { 3257 {
1648 SV *sv = perl_get_sv("Coro::API", 1); 3258 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1649 3259
1650 coroapi.schedule = api_schedule; 3260 coroapi.schedule = api_schedule;
3261 coroapi.schedule_to = api_schedule_to;
1651 coroapi.cede = api_cede; 3262 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself; 3263 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready; 3264 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready; 3265 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready; 3266 coroapi.nready = coro_nready;
1656 coroapi.current = coro_current; 3267 coroapi.current = coro_current;
1657 3268
1658 GCoroAPI = &coroapi; 3269 /*GCoroAPI = &coroapi;*/
1659 sv_setiv (sv, (IV)&coroapi); 3270 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv); 3271 SvREADONLY_on (sv);
1661 } 3272 }
1662} 3273}
3274
3275void
3276terminate (...)
3277 CODE:
3278 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3279
3280void
3281schedule (...)
3282 CODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3284
3285void
3286schedule_to (...)
3287 CODE:
3288 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3289
3290void
3291cede_to (...)
3292 CODE:
3293 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3294
3295void
3296cede (...)
3297 CODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_cede);
3299
3300void
3301cede_notself (...)
3302 CODE:
3303 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1663 3304
1664void 3305void
1665_set_current (SV *current) 3306_set_current (SV *current)
1666 PROTOTYPE: $ 3307 PROTOTYPE: $
1667 CODE: 3308 CODE:
1668 SvREFCNT_dec (SvRV (coro_current)); 3309 SvREFCNT_dec (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3310 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3311
3312void
3313_set_readyhook (SV *hook)
3314 PROTOTYPE: $
3315 CODE:
3316 SvREFCNT_dec (coro_readyhook);
3317 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1670 3318
1671int 3319int
1672prio (Coro::State coro, int newprio = 0) 3320prio (Coro::State coro, int newprio = 0)
3321 PROTOTYPE: $;$
1673 ALIAS: 3322 ALIAS:
1674 nice = 1 3323 nice = 1
1675 CODE: 3324 CODE:
1676{ 3325{
1677 RETVAL = coro->prio; 3326 RETVAL = coro->prio;
… …
1692 3341
1693SV * 3342SV *
1694ready (SV *self) 3343ready (SV *self)
1695 PROTOTYPE: $ 3344 PROTOTYPE: $
1696 CODE: 3345 CODE:
1697 RETVAL = boolSV (api_ready (self)); 3346 RETVAL = boolSV (api_ready (aTHX_ self));
1698 OUTPUT: 3347 OUTPUT:
1699 RETVAL 3348 RETVAL
1700 3349
1701int 3350int
1702nready (...) 3351nready (...)
… …
1704 CODE: 3353 CODE:
1705 RETVAL = coro_nready; 3354 RETVAL = coro_nready;
1706 OUTPUT: 3355 OUTPUT:
1707 RETVAL 3356 RETVAL
1708 3357
1709# for async_pool speedup
1710void 3358void
1711_pool_1 (SV *cb) 3359suspend (Coro::State self)
3360 PROTOTYPE: $
1712 CODE: 3361 CODE:
1713{ 3362 self->flags |= CF_SUSPENDED;
1714 struct coro *coro = SvSTATE (coro_current);
1715 HV *hv = (HV *)SvRV (coro_current);
1716 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av;
1719 int i, len;
1720 3363
1721 if (!invoke) 3364void
1722 croak ("\3terminate\2\n"); 3365resume (Coro::State self)
3366 PROTOTYPE: $
3367 CODE:
3368 self->flags &= ~CF_SUSPENDED;
1723 3369
1724 SvREFCNT_dec (coro->saved_deffh); 3370void
1725 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3371_pool_handler (...)
3372 CODE:
3373 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1726 3374
1727 hv_store (hv, "desc", sizeof ("desc") - 1, 3375void
1728 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3376async_pool (SV *cv, ...)
3377 PROTOTYPE: &@
3378 PPCODE:
3379{
3380 HV *hv = (HV *)av_pop (av_async_pool);
3381 AV *av = newAV ();
3382 SV *cb = ST (0);
3383 int i;
1729 3384
1730 invoke_av = (AV *)SvRV (invoke); 3385 av_extend (av, items - 2);
1731 len = av_len (invoke_av); 3386 for (i = 1; i < items; ++i)
3387 av_push (av, SvREFCNT_inc_NN (ST (i)));
1732 3388
1733 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3389 if ((SV *)hv == &PL_sv_undef)
1734
1735 if (len > 0)
1736 { 3390 {
1737 av_fill (defav, len - 1); 3391 PUSHMARK (SP);
1738 for (i = 0; i < len; ++i) 3392 EXTEND (SP, 2);
1739 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3393 PUSHs (sv_Coro);
3394 PUSHs ((SV *)cv_pool_handler);
3395 PUTBACK;
3396 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3397 SPAGAIN;
3398
3399 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1740 } 3400 }
1741 3401
3402 {
3403 struct coro *coro = SvSTATE_hv (hv);
3404
3405 assert (!coro->invoke_cb);
3406 assert (!coro->invoke_av);
3407 coro->invoke_cb = SvREFCNT_inc (cb);
3408 coro->invoke_av = av;
3409 }
3410
3411 api_ready (aTHX_ (SV *)hv);
3412
3413 if (GIMME_V != G_VOID)
3414 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3415 else
1742 SvREFCNT_dec (invoke); 3416 SvREFCNT_dec (hv);
1743} 3417}
1744 3418
1745void 3419SV *
1746_pool_2 (SV *cb) 3420rouse_cb ()
3421 PROTOTYPE:
1747 CODE: 3422 CODE:
1748{ 3423 RETVAL = coro_new_rouse_cb (aTHX);
1749 struct coro *coro = SvSTATE (coro_current);
1750
1751 sv_setsv (cb, &PL_sv_undef);
1752
1753 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1754 coro->saved_deffh = 0;
1755
1756 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1757 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1758 croak ("\3terminate\2\n");
1759
1760 av_clear (GvAV (PL_defgv));
1761 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1762 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1763
1764 coro->prio = 0;
1765
1766 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1767 api_trace (coro_current, 0);
1768
1769 av_push (av_async_pool, newSVsv (coro_current));
1770}
1771
1772
1773MODULE = Coro::State PACKAGE = Coro::AIO
1774
1775SV *
1776_get_state ()
1777 CODE:
1778{
1779 struct io_state *data;
1780
1781 RETVAL = newSV (sizeof (struct io_state));
1782 data = (struct io_state *)SvPVX (RETVAL);
1783 SvCUR_set (RETVAL, sizeof (struct io_state));
1784 SvPOK_only (RETVAL);
1785
1786 data->errorno = errno;
1787 data->laststype = PL_laststype;
1788 data->laststatval = PL_laststatval;
1789 data->statcache = PL_statcache;
1790}
1791 OUTPUT: 3424 OUTPUT:
1792 RETVAL 3425 RETVAL
1793 3426
1794void 3427void
1795_set_state (char *data_) 3428rouse_wait (...)
3429 PROTOTYPE: ;$
3430 PPCODE:
3431 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3432
3433void
3434on_enter (SV *block)
3435 ALIAS:
3436 on_leave = 1
1796 PROTOTYPE: $ 3437 PROTOTYPE: &
1797 CODE: 3438 CODE:
1798{ 3439{
1799 struct io_state *data = (void *)data_; 3440 struct coro *coro = SvSTATE_current;
3441 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1800 3442
1801 errno = data->errorno; 3443 block = (SV *)coro_sv_2cv (aTHX_ block);
1802 PL_laststype = data->laststype;
1803 PL_laststatval = data->laststatval;
1804 PL_statcache = data->statcache;
1805}
1806 3444
3445 if (!*avp)
3446 *avp = newAV ();
3447
3448 av_push (*avp, SvREFCNT_inc (block));
3449
3450 if (!ix)
3451 on_enterleave_call (aTHX_ block);
3452
3453 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3454 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3455 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3456}
3457
3458
3459MODULE = Coro::State PACKAGE = PerlIO::cede
3460
3461BOOT:
3462 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3463
3464
3465MODULE = Coro::State PACKAGE = Coro::Semaphore
3466
3467SV *
3468new (SV *klass, SV *count = 0)
3469 CODE:
3470 RETVAL = sv_bless (
3471 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3472 GvSTASH (CvGV (cv))
3473 );
3474 OUTPUT:
3475 RETVAL
3476
3477# helper for Coro::Channel and others
3478SV *
3479_alloc (int count)
3480 CODE:
3481 RETVAL = coro_waitarray_new (aTHX_ count);
3482 OUTPUT:
3483 RETVAL
3484
3485SV *
3486count (SV *self)
3487 CODE:
3488 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3489 OUTPUT:
3490 RETVAL
3491
3492void
3493up (SV *self, int adjust = 1)
3494 ALIAS:
3495 adjust = 1
3496 CODE:
3497 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3498
3499void
3500down (...)
3501 CODE:
3502 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3503
3504void
3505wait (...)
3506 CODE:
3507 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3508
3509void
3510try (SV *self)
3511 PPCODE:
3512{
3513 AV *av = (AV *)SvRV (self);
3514 SV *count_sv = AvARRAY (av)[0];
3515 IV count = SvIVX (count_sv);
3516
3517 if (count > 0)
3518 {
3519 --count;
3520 SvIVX (count_sv) = count;
3521 XSRETURN_YES;
3522 }
3523 else
3524 XSRETURN_NO;
3525}
3526
3527void
3528waiters (SV *self)
3529 PPCODE:
3530{
3531 AV *av = (AV *)SvRV (self);
3532 int wcount = AvFILLp (av) + 1 - 1;
3533
3534 if (GIMME_V == G_SCALAR)
3535 XPUSHs (sv_2mortal (newSViv (wcount)));
3536 else
3537 {
3538 int i;
3539 EXTEND (SP, wcount);
3540 for (i = 1; i <= wcount; ++i)
3541 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3542 }
3543}
3544
3545MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3546
3547void
3548_may_delete (SV *sem, int count, int extra_refs)
3549 PPCODE:
3550{
3551 AV *av = (AV *)SvRV (sem);
3552
3553 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3554 && AvFILLp (av) == 0 /* no waiters, just count */
3555 && SvIV (AvARRAY (av)[0]) == count)
3556 XSRETURN_YES;
3557
3558 XSRETURN_NO;
3559}
3560
3561MODULE = Coro::State PACKAGE = Coro::Signal
3562
3563SV *
3564new (SV *klass)
3565 CODE:
3566 RETVAL = sv_bless (
3567 coro_waitarray_new (aTHX_ 0),
3568 GvSTASH (CvGV (cv))
3569 );
3570 OUTPUT:
3571 RETVAL
3572
3573void
3574wait (...)
3575 CODE:
3576 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3577
3578void
3579broadcast (SV *self)
3580 CODE:
3581{
3582 AV *av = (AV *)SvRV (self);
3583 coro_signal_wake (aTHX_ av, AvFILLp (av));
3584}
3585
3586void
3587send (SV *self)
3588 CODE:
3589{
3590 AV *av = (AV *)SvRV (self);
3591
3592 if (AvFILLp (av))
3593 coro_signal_wake (aTHX_ av, 1);
3594 else
3595 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3596}
3597
3598IV
3599awaited (SV *self)
3600 CODE:
3601 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3602 OUTPUT:
3603 RETVAL
3604
3605
3606MODULE = Coro::State PACKAGE = Coro::AnyEvent
3607
3608BOOT:
3609 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3610
3611void
3612_schedule (...)
3613 CODE:
3614{
3615 static int incede;
3616
3617 api_cede_notself (aTHX);
3618
3619 ++incede;
3620 while (coro_nready >= incede && api_cede (aTHX))
3621 ;
3622
3623 sv_setsv (sv_activity, &PL_sv_undef);
3624 if (coro_nready >= incede)
3625 {
3626 PUSHMARK (SP);
3627 PUTBACK;
3628 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3629 }
3630
3631 --incede;
3632}
3633
3634
3635MODULE = Coro::State PACKAGE = Coro::AIO
3636
3637void
3638_register (char *target, char *proto, SV *req)
3639 CODE:
3640{
3641 CV *req_cv = coro_sv_2cv (aTHX_ req);
3642 /* newXSproto doesn't return the CV on 5.8 */
3643 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3644 sv_setpv ((SV *)slf_cv, proto);
3645 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3646}
3647

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