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Comparing Coro/Coro/State.xs (file contents):
Revision 1.190 by root, Fri Oct 5 20:39:39 2007 UTC vs.
Revision 1.357 by root, Sat Jun 27 14:09:28 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
80/* 5.8.8 */
81#ifndef GV_NOTQUAL
82# define GV_NOTQUAL 0
83#endif
84
85#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
86# undef CORO_STACKGUARD 116# undef CORO_STACKGUARD
87#endif 117#endif
88 118
89#ifndef CORO_STACKGUARD 119#ifndef CORO_STACKGUARD
… …
95# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
96#endif 126#endif
97 127
98/* 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
99 * 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
100#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
101#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
102 137
103#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
104 139
105#if __GNUC__ >= 3 140#if __GNUC__ >= 3
106# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
107# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
108#else 144#else
109# define attribute(x) 145# define attribute(x)
110# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
111#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
112 152
113#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
114 154
115#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
116 157
117#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
118static perl_mutex coro_mutex; 159# if CORO_PTHREAD
119# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
120# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
121#else
122# define LOCK (void)0
123# define UNLOCK (void)0
124#endif 161# endif
162#endif
125 163
126/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
127struct io_state
128{
129 int errorno;
130 I32 laststype;
131 int laststatval;
132 Stat_t statcache;
133};
134 165
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;
135static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
136static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
137static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
138static JMPENV *main_top_env; 174static JMPENV *main_top_env;
139static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
140static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
141 181
142static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
143static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
144 187
145/* async_pool helper stuff */ 188/* async_pool helper stuff */
146static SV *sv_pool_rss; 189static SV *sv_pool_rss;
147static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
148static 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;
149 199
150static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
151static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
152 202
153enum { 203enum {
… …
158 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
159 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
160}; 210};
161 211
162/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
163typedef struct coro_cctx { 213typedef struct coro_cctx
214{
164 struct coro_cctx *next; 215 struct coro_cctx *next;
165 216
166 /* the stack */ 217 /* the stack */
167 void *sptr; 218 void *sptr;
168 size_t ssize; 219 size_t ssize;
… …
171 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
172 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 */
173 JMPENV *top_env; 224 JMPENV *top_env;
174 coro_context cctx; 225 coro_context cctx;
175 226
227 U32 gen;
176#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
177 int valgrind_id; 229 int valgrind_id;
178#endif 230#endif
179 unsigned char flags; 231 unsigned char flags;
180} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
181 237
182enum { 238enum {
183 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
184 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
185 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
186 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 */
187}; 244};
188 245
189/* this is a structure representing a perl-level coroutine */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
190struct coro { 247typedef struct
191 /* the c coroutine allocated to this perl coroutine, if any */ 248{
192 coro_cctx *cctx; 249 SV *defsv;
193 250 AV *defav;
194 /* data associated with this coroutine (initial args) */ 251 SV *errsv;
195 AV *args; 252 SV *irsgv;
196 int refcnt; 253 HV *hinthv;
197 int flags; /* CF_ flags */
198
199 /* optionally saved, might be zero */
200 AV *defav; /* @_ */
201 SV *defsv; /* $_ */
202 SV *errsv; /* $@ */
203 SV *deffh; /* default filehandle */
204 SV *irssv; /* $/ */
205 SV *irssv_sv; /* real $/ cache */
206
207#define VAR(name,type) type name; 254#define VAR(name,type) type name;
208# include "state.h" 255# include "state.h"
209#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);
210 280
211 /* statistics */ 281 /* statistics */
212 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
213 283
214 /* coro process data */ 284 /* coro process data */
215 int prio; 285 int prio;
216 //SV *throw; 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
217 288
218 /* async_pool */ 289 /* async_pool */
219 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;
220 297
221 /* linked list */ 298 /* linked list */
222 struct coro *next, *prev; 299 struct coro *next, *prev;
223 HV *hv; /* the perl hash associated with this coro, if any */
224}; 300};
225 301
226typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
227typedef 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 */
228 309
229/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
230 311
231#define PRIO_MAX 3 312#define PRIO_MAX 3
232#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
235#define PRIO_IDLE -3 316#define PRIO_IDLE -3
236#define PRIO_MIN -4 317#define PRIO_MIN -4
237 318
238/* for Coro.pm */ 319/* for Coro.pm */
239static SV *coro_current; 320static SV *coro_current;
240static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
241static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
242static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
243 326
244/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
245 328
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
246static 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 *
247coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
248{ 427{
249 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
250 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
251 430
252 newpadlist = newAV (); 431 newpadlist = newAV ();
253 AvREAL_off (newpadlist); 432 AvREAL_off (newpadlist);
254#if PERL_VERSION_ATLEAST (5,9,0) 433#if PERL_VERSION_ATLEAST (5,10,0)
255 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
256#else 435#else
257 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
258#endif 437#endif
259 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
260 --AvFILLp (padlist); 439 --AvFILLp (padlist);
261 440
262 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
263 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
264 443
265 return newpadlist; 444 return newpadlist;
266} 445}
267 446
268static void 447static void
269free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
270{ 449{
271 /* may be during global destruction */ 450 /* may be during global destruction */
272 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
273 { 452 {
274 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
275 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
276 { 456 {
277 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
278 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
279 { 459 I32 j = AvFILLp (av);
280 SV *sv; 460
281 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
282 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
283
284 SvREFCNT_dec (*svp);
285 }
286 } 466 }
287 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
288 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
289 } 472 }
290} 473}
291 474
292static int 475static int
… …
297 480
298 /* casting is fun. */ 481 /* casting is fun. */
299 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
300 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
301 484
302 SvREFCNT_dec (av); 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
303 486
304 return 0; 487 return 0;
305} 488}
306 489
307#define PERL_MAGIC_coro PERL_MAGIC_ext 490static MGVTBL coro_cv_vtbl = {
308 491 0, 0, 0, 0,
309static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 492 coro_cv_free
310 493};
311#define CORO_MAGIC(cv) \
312 SvMAGIC (cv) \
313 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
314 ? SvMAGIC (cv) \
315 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
316 : 0
317
318static struct coro *
319SvSTATE_ (pTHX_ SV *coro)
320{
321 HV *stash;
322 MAGIC *mg;
323
324 if (SvROK (coro))
325 coro = SvRV (coro);
326
327 if (SvTYPE (coro) != SVt_PVHV)
328 croak ("Coro::State object required");
329
330 stash = SvSTASH (coro);
331 if (stash != coro_stash && stash != coro_state_stash)
332 {
333 /* very slow, but rare, check */
334 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
335 croak ("Coro::State object required");
336 }
337
338 mg = CORO_MAGIC (coro);
339 return (struct coro *)mg->mg_ptr;
340}
341
342#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
343 494
344/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
345static void 496static void
346get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
347{ 498{
348 MAGIC *mg = CORO_MAGIC (cv); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
349 AV *av; 500 AV *av;
350 501
351 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
352 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
353 else 504 else
354 { 505 {
355#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
356 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
357 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
358 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
359 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
360 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
361#else 513#else
362 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
363#endif 515#endif
364 } 516 }
365} 517}
366 518
367static void 519static void
368put_padlist (pTHX_ CV *cv) 520put_padlist (pTHX_ CV *cv)
369{ 521{
370 MAGIC *mg = CORO_MAGIC (cv); 522 MAGIC *mg = CORO_MAGIC_cv (cv);
371 AV *av; 523 AV *av;
372 524
373 if (!mg) 525 if (expect_false (!mg))
374 { 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
375 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
376 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
377 mg->mg_virtual = &vtbl_coro;
378 mg->mg_obj = (SV *)newAV ();
379 }
380 527
381 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
382 529
383 if (AvFILLp (av) >= AvMAX (av)) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
384 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
385 532
386 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
387} 534}
388 535
389/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
390 537
391static void 538static void
539on_enterleave_call (pTHX_ SV *cb);
540
541static void
392load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
393{ 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
394#define VAR(name,type) PL_ ## name = c->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
395# include "state.h" 556 # include "state.h"
396#undef VAR 557 #undef VAR
397
398 GvSV (PL_defgv) = c->defsv;
399 GvAV (PL_defgv) = c->defav;
400 GvSV (PL_errgv) = c->errsv;
401 GvSV (irsgv) = c->irssv_sv;
402 558
403 { 559 {
404 dSP; 560 dSP;
561
405 CV *cv; 562 CV *cv;
406 563
407 /* now do the ugly restore mess */ 564 /* now do the ugly restore mess */
408 while ((cv = (CV *)POPs)) 565 while (expect_true (cv = (CV *)POPs))
409 { 566 {
410 put_padlist (aTHX_ cv); /* mark this padlist as available */ 567 put_padlist (aTHX_ cv); /* mark this padlist as available */
411 CvDEPTH (cv) = PTR2IV (POPs); 568 CvDEPTH (cv) = PTR2IV (POPs);
412 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
413 } 570 }
414 571
415 PUTBACK; 572 PUTBACK;
416 } 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 }
417} 585}
418 586
419static void 587static void
420save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
421{ 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
422 { 601 {
423 dSP; 602 dSP;
424 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
425 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
426 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
432 611
433 XPUSHs (Nullsv); 612 XPUSHs (Nullsv);
434 /* this loop was inspired by pp_caller */ 613 /* this loop was inspired by pp_caller */
435 for (;;) 614 for (;;)
436 { 615 {
437 while (cxix >= 0) 616 while (expect_true (cxix >= 0))
438 { 617 {
439 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
440 619
441 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 620 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
442 { 621 {
443 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
444 623
445 if (CvDEPTH (cv)) 624 if (expect_true (CvDEPTH (cv)))
446 { 625 {
447 EXTEND (SP, 3); 626 EXTEND (SP, 3);
448 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
449 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
450 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
451 630
452 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
453 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
454 } 633 }
455 } 634 }
456 } 635 }
457 636
458 if (top_si->si_type == PERLSI_MAIN) 637 if (expect_true (top_si->si_type == PERLSI_MAIN))
459 break; 638 break;
460 639
461 top_si = top_si->si_prev; 640 top_si = top_si->si_prev;
462 ccstk = top_si->si_cxstack; 641 ccstk = top_si->si_cxstack;
463 cxix = top_si->si_cxix; 642 cxix = top_si->si_cxix;
464 } 643 }
465 644
466 PUTBACK; 645 PUTBACK;
467 } 646 }
468 647
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
469 c->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
470 c->defsv = DEFSV; 666 slot->defsv = DEFSV;
471 c->errsv = ERRSV; 667 slot->errsv = ERRSV;
472 c->irssv_sv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
473 670
474#define VAR(name,type)c->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
475# include "state.h" 672 # include "state.h"
476#undef VAR 673 #undef VAR
674 }
477} 675}
478 676
479/* 677/*
480 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
481 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
482 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
483 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
484 */ 682 */
485#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
486# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
487#else 685#else
488static void 686static void
489coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
490{ 688{
491 PL_curstackinfo = new_stackinfo(64, 6); 689 PL_curstackinfo = new_stackinfo(32, 8);
492 PL_curstackinfo->si_type = PERLSI_MAIN; 690 PL_curstackinfo->si_type = PERLSI_MAIN;
493 PL_curstack = PL_curstackinfo->si_stack; 691 PL_curstack = PL_curstackinfo->si_stack;
494 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
495 693
496 PL_stack_base = AvARRAY(PL_curstack); 694 PL_stack_base = AvARRAY(PL_curstack);
497 PL_stack_sp = PL_stack_base; 695 PL_stack_sp = PL_stack_base;
498 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
499 697
500 New(50,PL_tmps_stack,64,SV*); 698 New(50,PL_tmps_stack,32,SV*);
501 PL_tmps_floor = -1; 699 PL_tmps_floor = -1;
502 PL_tmps_ix = -1; 700 PL_tmps_ix = -1;
503 PL_tmps_max = 64; 701 PL_tmps_max = 32;
504 702
505 New(54,PL_markstack,16,I32); 703 New(54,PL_markstack,16,I32);
506 PL_markstack_ptr = PL_markstack; 704 PL_markstack_ptr = PL_markstack;
507 PL_markstack_max = PL_markstack + 16; 705 PL_markstack_max = PL_markstack + 16;
508 706
509#ifdef SET_MARK_OFFSET 707#ifdef SET_MARK_OFFSET
510 SET_MARK_OFFSET; 708 SET_MARK_OFFSET;
511#endif 709#endif
512 710
513 New(54,PL_scopestack,16,I32); 711 New(54,PL_scopestack,8,I32);
514 PL_scopestack_ix = 0; 712 PL_scopestack_ix = 0;
515 PL_scopestack_max = 16; 713 PL_scopestack_max = 8;
516 714
517 New(54,PL_savestack,64,ANY); 715 New(54,PL_savestack,24,ANY);
518 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
519 PL_savestack_max = 64; 717 PL_savestack_max = 24;
520 718
521#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
522 New(54,PL_retstack,4,OP*); 720 New(54,PL_retstack,4,OP*);
523 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
524 PL_retstack_max = 4; 722 PL_retstack_max = 4;
525#endif 723#endif
526} 724}
… …
528 726
529/* 727/*
530 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
531 */ 729 */
532static void 730static void
533coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
534{ 732{
535 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
536 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
537 735
538 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
549 747
550 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
551 Safefree (PL_markstack); 749 Safefree (PL_markstack);
552 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
553 Safefree (PL_savestack); 751 Safefree (PL_savestack);
554#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
555 Safefree (PL_retstack); 753 Safefree (PL_retstack);
556#endif 754#endif
557} 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);
558 765
559static size_t 766static size_t
560coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
561{ 768{
562 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
563 770
564 if (coro->mainstack) 771 if (coro->mainstack)
565 { 772 {
566 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
567 { 774 {
568 #define VAR(name,type)coro->name = PL_ ## name; 775 #define SYM(sym) PL_ ## sym
569 # include "state.h" 776 CORO_RSS;
570 #undef VAR 777 #undef SYM
571 } 778 }
572 779 else
573 rss += sizeof (coro->curstackinfo); 780 {
574 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 781 #define SYM(sym) coro->slot->sym
575 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 782 CORO_RSS;
576 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 783 #undef SYM
577 rss += coro->tmps_max * sizeof (SV *); 784 }
578 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
579 rss += coro->scopestack_max * sizeof (I32);
580 rss += coro->savestack_max * sizeof (ANY);
581
582#if !PERL_VERSION_ATLEAST (5,9,0)
583 rss += coro->retstack_max * sizeof (OP *);
584#endif
585 } 785 }
586 786
587 return rss; 787 return rss;
588} 788}
589 789
590/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
591 791
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 */
592static 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 */
593coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
594{ 902{
595 /* 903 /*
596 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
597 */ 905 */
… …
599 907
600 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
601 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
602 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
603 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
604 PL_curpm = 0; 915 PL_curpm = 0;
916 PL_curpad = 0;
605 PL_localizing = 0; 917 PL_localizing = 0;
606 PL_dirty = 0; 918 PL_dirty = 0;
607 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);
608 928
609 GvSV (PL_defgv) = NEWSV (0, 0); 929 GvSV (PL_defgv) = newSV (0);
610 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
611 GvSV (PL_errgv) = NEWSV (0, 0); 931 GvSV (PL_errgv) = newSV (0);
612 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;
613 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
614 PL_defoutgv = SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
615 936
616 { 937 {
617 dSP; 938 dSP;
618 LOGOP myop; 939 UNOP myop;
619 940
620 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
621 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
622 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
623 945
624 PUSHMARK (SP); 946 PUSHMARK (SP);
625 XPUSHs (av_shift (GvAV (PL_defgv))); 947 PUSHs ((SV *)coro->startcv);
626 PUTBACK; 948 PUTBACK;
627 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
628 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
629 SPAGAIN;
630 } 951 }
631 952
632 ENTER; /* necessary e.g. for dounwind */ 953 /* this newly created coroutine might be run on an existing cctx which most
633} 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 */
634 958
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
635static void 971static void
636coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
637{ 973{
638 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
639 { 975 {
640 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
641 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
649 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
650 986
651 /* unwind main stack */ 987 /* unwind main stack */
652 dounwind (-1); 988 dounwind (-1);
653 } 989 }
990}
654 991
655 SvREFCNT_dec (GvSV (PL_defgv)); 992static void
656 SvREFCNT_dec (GvAV (PL_defgv)); 993coro_destruct_perl (pTHX_ struct coro *coro)
657 SvREFCNT_dec (GvSV (PL_errgv)); 994{
658 SvREFCNT_dec (PL_defoutgv); 995 SV *svf [9];
659 SvREFCNT_dec (PL_rs);
660 SvREFCNT_dec (GvSV (irsgv));
661 996
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
662 SvREFCNT_dec (coro->saved_deffh); 1029 SvREFCNT_dec (coro->saved_deffh);
663 //SvREFCNT_dec (coro->throw); 1030 SvREFCNT_dec (coro->rouse_cb);
664 1031 SvREFCNT_dec (coro->invoke_cb);
665 coro_destroy_stacks (aTHX); 1032 SvREFCNT_dec (coro->invoke_av);
1033 }
666} 1034}
667 1035
668static void 1036INLINE void
669free_coro_mortal (pTHX) 1037free_coro_mortal (pTHX)
670{ 1038{
671 if (coro_mortal) 1039 if (expect_true (coro_mortal))
672 { 1040 {
673 SvREFCNT_dec (coro_mortal); 1041 SvREFCNT_dec (coro_mortal);
674 coro_mortal = 0; 1042 coro_mortal = 0;
675 } 1043 }
676} 1044}
… …
678static int 1046static int
679runops_trace (pTHX) 1047runops_trace (pTHX)
680{ 1048{
681 COP *oldcop = 0; 1049 COP *oldcop = 0;
682 int oldcxix = -2; 1050 int oldcxix = -2;
683 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
684 coro_cctx *cctx = coro->cctx;
685 1051
686 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1052 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
687 { 1053 {
688 PERL_ASYNC_CHECK (); 1054 PERL_ASYNC_CHECK ();
689 1055
690 if (cctx->flags & CC_TRACE_ALL) 1056 if (cctx_current->flags & CC_TRACE_ALL)
691 { 1057 {
692 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)
693 { 1059 {
694 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1060 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
695 SV **bot, **top; 1061 SV **bot, **top;
696 AV *av = newAV (); /* return values */ 1062 AV *av = newAV (); /* return values */
697 SV **cb; 1063 SV **cb;
… …
705 bot = PL_stack_base + cx->blk_oldsp + 1; 1071 bot = PL_stack_base + cx->blk_oldsp + 1;
706 top = cx->blk_gimme == G_ARRAY ? SP + 1 1072 top = cx->blk_gimme == G_ARRAY ? SP + 1
707 : cx->blk_gimme == G_SCALAR ? bot + 1 1073 : cx->blk_gimme == G_SCALAR ? bot + 1
708 : bot; 1074 : bot;
709 1075
1076 av_extend (av, top - bot);
710 while (bot < top) 1077 while (bot < top)
711 av_push (av, SvREFCNT_inc (*bot++)); 1078 av_push (av, SvREFCNT_inc_NN (*bot++));
712 1079
713 PL_runops = RUNOPS_DEFAULT; 1080 PL_runops = RUNOPS_DEFAULT;
714 ENTER; 1081 ENTER;
715 SAVETMPS; 1082 SAVETMPS;
716 EXTEND (SP, 3); 1083 EXTEND (SP, 3);
… …
733 1100
734 if (PL_curcop != &PL_compiling) 1101 if (PL_curcop != &PL_compiling)
735 { 1102 {
736 SV **cb; 1103 SV **cb;
737 1104
738 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1105 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
739 { 1106 {
740 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1107 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
741 1108
742 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1109 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
743 { 1110 {
744 runops_proc_t old_runops = PL_runops;
745 dSP; 1111 dSP;
746 GV *gv = CvGV (cx->blk_sub.cv); 1112 GV *gv = CvGV (cx->blk_sub.cv);
747 SV *fullname = sv_2mortal (newSV (0)); 1113 SV *fullname = sv_2mortal (newSV (0));
748 1114
749 if (isGV (gv)) 1115 if (isGV (gv))
… …
754 SAVETMPS; 1120 SAVETMPS;
755 EXTEND (SP, 3); 1121 EXTEND (SP, 3);
756 PUSHMARK (SP); 1122 PUSHMARK (SP);
757 PUSHs (&PL_sv_yes); 1123 PUSHs (&PL_sv_yes);
758 PUSHs (fullname); 1124 PUSHs (fullname);
759 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);
760 PUTBACK; 1126 PUTBACK;
761 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);
762 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);
763 SPAGAIN; 1129 SPAGAIN;
764 FREETMPS; 1130 FREETMPS;
… …
767 } 1133 }
768 1134
769 oldcxix = cxstack_ix; 1135 oldcxix = cxstack_ix;
770 } 1136 }
771 1137
772 if (cctx->flags & CC_TRACE_LINE) 1138 if (cctx_current->flags & CC_TRACE_LINE)
773 { 1139 {
774 dSP; 1140 dSP;
775 1141
776 PL_runops = RUNOPS_DEFAULT; 1142 PL_runops = RUNOPS_DEFAULT;
777 ENTER; 1143 ENTER;
… …
796 1162
797 TAINT_NOT; 1163 TAINT_NOT;
798 return 0; 1164 return 0;
799} 1165}
800 1166
801/* inject a fake call to Coro::State::_cctx_init into the execution */ 1167static struct CoroSLF cctx_ssl_frame;
802/* _cctx_init should be careful, as it could be called at almost any time */ 1168
803/* 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 */
804static void NOINLINE 1184static void NOINLINE
805prepare_cctx (pTHX_ coro_cctx *cctx) 1185cctx_prepare (pTHX)
806{ 1186{
807 dSP;
808 LOGOP myop;
809
810 PL_top_env = &PL_start_env; 1187 PL_top_env = &PL_start_env;
811 1188
812 if (cctx->flags & CC_TRACE) 1189 if (cctx_current->flags & CC_TRACE)
813 PL_runops = runops_trace; 1190 PL_runops = runops_trace;
814 1191
815 Zero (&myop, 1, LOGOP); 1192 /* we already must be executing an SLF op, there is no other valid way
816 myop.op_next = PL_op; 1193 * that can lead to creation of a new cctx */
817 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));
818 1196
819 PUSHMARK (SP); 1197 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
820 EXTEND (SP, 2); 1198 cctx_ssl_frame = slf_frame;
821 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1199
822 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1200 slf_frame.prepare = slf_prepare_set_stacklevel;
823 PUTBACK; 1201 slf_frame.check = slf_check_set_stacklevel;
824 PL_op = (OP *)&myop; 1202}
825 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1203
826 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);
827} 1209}
828 1210
829/* 1211/*
830 * this is a _very_ stripped down perl interpreter ;) 1212 * this is a _very_ stripped down perl interpreter ;)
831 */ 1213 */
832static void 1214static void
833coro_run (void *arg) 1215cctx_run (void *arg)
834{ 1216{
1217#ifdef USE_ITHREADS
1218# if CORO_PTHREAD
1219 PERL_SET_CONTEXT (coro_thx);
1220# endif
1221#endif
1222 {
835 dTHX; 1223 dTHX;
836 1224
837 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1225 /* normally we would need to skip the entersub here */
838 UNLOCK; 1226 /* not doing so will re-execute it, which is exactly what we want */
839
840 /* we now skip the entersub that lead to transfer() */
841 PL_op = PL_op->op_next; 1227 /* PL_nop = PL_nop->op_next */
842 1228
843 /* inject a fake subroutine call to cctx_init */ 1229 /* inject a fake subroutine call to cctx_init */
844 prepare_cctx (aTHX_ (coro_cctx *)arg); 1230 cctx_prepare (aTHX);
845 1231
1232 /* cctx_run is the alternative tail of transfer() */
1233 transfer_tail (aTHX);
1234
846 /* 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 */
847 PL_restartop = PL_op; 1236 PL_restartop = PL_op;
848 perl_run (PL_curinterp); 1237 perl_run (PL_curinterp);
849
850 /* 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 /*
851 * 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
852 * 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)
853 * 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
854 * bootstrap-time "top" top_env, as we cannot restore the "main" 1247 * bootstrap-time "top" top_env, as we cannot restore the "main"
855 * 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.
856 */ 1251 */
857 PL_top_env = main_top_env; 1252 PL_top_env = main_top_env;
858 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 }
859} 1255}
860 1256
861static coro_cctx * 1257static coro_cctx *
862cctx_new () 1258cctx_new ()
863{ 1259{
864 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 ();
865 void *stack_start; 1289 void *stack_start;
866 size_t stack_size; 1290 size_t stack_size;
867 1291
868 ++cctx_count;
869
870 Newz (0, cctx, 1, coro_cctx);
871
872#if HAVE_MMAP 1292#if HAVE_MMAP
873
874 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;
875 /* mmap supposedly does allocate-on-write for us */ 1294 /* mmap supposedly does allocate-on-write for us */
876 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);
877 1296
878 if (cctx->sptr != (void *)-1) 1297 if (cctx->sptr != (void *)-1)
879 { 1298 {
880# if CORO_STACKGUARD 1299 #if CORO_STACKGUARD
881 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1300 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
882# endif 1301 #endif
883 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1302 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
884 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1303 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
885 cctx->flags |= CC_MAPPED; 1304 cctx->flags |= CC_MAPPED;
886 } 1305 }
887 else 1306 else
888#endif 1307#endif
889 { 1308 {
890 cctx->ssize = coro_stacksize * (long)sizeof (long); 1309 cctx->ssize = cctx_stacksize * (long)sizeof (long);
891 New (0, cctx->sptr, coro_stacksize, long); 1310 New (0, cctx->sptr, cctx_stacksize, long);
892 1311
893 if (!cctx->sptr) 1312 if (!cctx->sptr)
894 { 1313 {
895 perror ("FATAL: unable to allocate stack for coroutine"); 1314 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
896 _exit (EXIT_FAILURE); 1315 _exit (EXIT_FAILURE);
897 } 1316 }
898 1317
899 stack_start = cctx->sptr; 1318 stack_start = cctx->sptr;
900 stack_size = cctx->ssize; 1319 stack_size = cctx->ssize;
901 } 1320 }
902 1321
903 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
904 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);
905 1327
906 return cctx; 1328 return cctx;
907} 1329}
908 1330
909static void 1331static void
910cctx_destroy (coro_cctx *cctx) 1332cctx_destroy (coro_cctx *cctx)
911{ 1333{
912 if (!cctx) 1334 if (!cctx)
913 return; 1335 return;
914 1336
1337 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1338
915 --cctx_count; 1339 --cctx_count;
1340 coro_destroy (&cctx->cctx);
916 1341
1342 /* coro_transfer creates new, empty cctx's */
1343 if (cctx->sptr)
1344 {
917#if CORO_USE_VALGRIND 1345 #if CORO_USE_VALGRIND
918 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1346 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
919#endif 1347 #endif
920 1348
921#if HAVE_MMAP 1349#if HAVE_MMAP
922 if (cctx->flags & CC_MAPPED) 1350 if (cctx->flags & CC_MAPPED)
923 munmap (cctx->sptr, cctx->ssize); 1351 munmap (cctx->sptr, cctx->ssize);
924 else 1352 else
925#endif 1353#endif
926 Safefree (cctx->sptr); 1354 Safefree (cctx->sptr);
1355 }
927 1356
928 Safefree (cctx); 1357 Safefree (cctx);
929} 1358}
1359
1360/* wether this cctx should be destructed */
1361#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
930 1362
931static coro_cctx * 1363static coro_cctx *
932cctx_get (pTHX) 1364cctx_get (pTHX)
933{ 1365{
934 while (cctx_first) 1366 while (expect_true (cctx_first))
935 { 1367 {
936 coro_cctx *cctx = cctx_first; 1368 coro_cctx *cctx = cctx_first;
937 cctx_first = cctx->next; 1369 cctx_first = cctx->next;
938 --cctx_idle; 1370 --cctx_idle;
939 1371
940 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1372 if (expect_true (!CCTX_EXPIRED (cctx)))
941 return cctx; 1373 return cctx;
942 1374
943 cctx_destroy (cctx); 1375 cctx_destroy (cctx);
944 } 1376 }
945 1377
946 return cctx_new (); 1378 return cctx_new_run ();
947} 1379}
948 1380
949static void 1381static void
950cctx_put (coro_cctx *cctx) 1382cctx_put (coro_cctx *cctx)
951{ 1383{
1384 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1385
952 /* free another cctx if overlimit */ 1386 /* free another cctx if overlimit */
953 if (cctx_idle >= MAX_IDLE_CCTX) 1387 if (expect_false (cctx_idle >= cctx_max_idle))
954 { 1388 {
955 coro_cctx *first = cctx_first; 1389 coro_cctx *first = cctx_first;
956 cctx_first = first->next; 1390 cctx_first = first->next;
957 --cctx_idle; 1391 --cctx_idle;
958 1392
… …
964 cctx_first = cctx; 1398 cctx_first = cctx;
965} 1399}
966 1400
967/** coroutine switching *****************************************************/ 1401/** coroutine switching *****************************************************/
968 1402
969static void NOINLINE 1403static void
970transfer_check (pTHX_ struct coro *prev, struct coro *next) 1404transfer_check (pTHX_ struct coro *prev, struct coro *next)
971{ 1405{
972 if (prev != next) 1406 /* TODO: throwing up here is considered harmful */
1407
1408 if (expect_true (prev != next))
973 { 1409 {
974 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1410 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
975 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,");
976 1412
977 if (next->flags & CF_RUNNING) 1413 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
978 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
979
980 if (next->flags & CF_DESTROYED)
981 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,");
982 1415
1416#if !PERL_VERSION_ATLEAST (5,10,0)
983 if (PL_lex_state != LEX_NOTPARSING) 1417 if (expect_false (PL_lex_state != LEX_NOTPARSING))
984 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
985 } 1420 }
986} 1421}
987 1422
988/* always use the TRANSFER macro */ 1423/* always use the TRANSFER macro */
989static void NOINLINE 1424static void NOINLINE /* noinline so we have a fixed stackframe */
990transfer (pTHX_ struct coro *prev, struct coro *next) 1425transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
991{ 1426{
992 dSTACKLEVEL; 1427 dSTACKLEVEL;
993 1428
994 /* sometimes transfer is only called to set idle_sp */ 1429 /* sometimes transfer is only called to set idle_sp */
995 if (!next) 1430 if (expect_false (!prev))
996 { 1431 {
997 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1432 cctx_current->idle_sp = STACKLEVEL;
998 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 */
999 }
1000 else if (prev != next)
1001 { 1434 }
1435 else if (expect_true (prev != next))
1436 {
1002 coro_cctx *prev__cctx; 1437 coro_cctx *cctx_prev;
1003 1438
1004 if (prev->flags & CF_NEW) 1439 if (expect_false (prev->flags & CF_NEW))
1005 { 1440 {
1006 /* create a new empty context */ 1441 /* create a new empty/source context */
1007 Newz (0, prev->cctx, 1, coro_cctx);
1008 prev->flags &= ~CF_NEW; 1442 prev->flags &= ~CF_NEW;
1009 prev->flags |= CF_RUNNING; 1443 prev->flags |= CF_RUNNING;
1010 } 1444 }
1011 1445
1012 prev->flags &= ~CF_RUNNING; 1446 prev->flags &= ~CF_RUNNING;
1013 next->flags |= CF_RUNNING; 1447 next->flags |= CF_RUNNING;
1014 1448
1015 LOCK; 1449 /* first get rid of the old state */
1450 save_perl (aTHX_ prev);
1016 1451
1017 if (next->flags & CF_NEW) 1452 if (expect_false (next->flags & CF_NEW))
1018 { 1453 {
1019 /* need to start coroutine */ 1454 /* need to start coroutine */
1020 next->flags &= ~CF_NEW; 1455 next->flags &= ~CF_NEW;
1021 /* first get rid of the old state */
1022 save_perl (aTHX_ prev);
1023 /* setup coroutine call */ 1456 /* setup coroutine call */
1024 coro_setup (aTHX_ next); 1457 coro_setup (aTHX_ next);
1025 } 1458 }
1026 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 ))
1027 { 1468 {
1028 /* coroutine already started */ 1469 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1029 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));
1030 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);
1031 } 1479 }
1480 else
1481 prev->cctx = cctx_current;
1032 1482
1033 prev__cctx = prev->cctx; 1483 ++next->usecount;
1034 1484
1035 /* possibly "free" the cctx */ 1485 cctx_prev = cctx_current;
1036 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))
1037 { 1491 {
1038 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1492 cctx_prev->top_env = PL_top_env;
1039 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;
1040 1494 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1041 prev->cctx = 0;
1042
1043 cctx_put (prev__cctx);
1044 } 1495 }
1045 1496
1046 ++next->usecount; 1497 transfer_tail (aTHX);
1047
1048 if (!next->cctx)
1049 next->cctx = cctx_get (aTHX);
1050
1051 if (prev__cctx != next->cctx)
1052 {
1053 prev__cctx->top_env = PL_top_env;
1054 PL_top_env = next->cctx->top_env;
1055 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1056 }
1057
1058 free_coro_mortal (aTHX);
1059 UNLOCK;
1060 } 1498 }
1061} 1499}
1062 1500
1063struct transfer_args
1064{
1065 struct coro *prev, *next;
1066};
1067
1068#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1501#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1069#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1502#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1070 1503
1071/** high level stuff ********************************************************/ 1504/** high level stuff ********************************************************/
1072 1505
1073static int 1506static int
1074coro_state_destroy (pTHX_ struct coro *coro) 1507coro_state_destroy (pTHX_ struct coro *coro)
1075{ 1508{
1076 if (coro->flags & CF_DESTROYED) 1509 if (coro->flags & CF_DESTROYED)
1077 return 0; 1510 return 0;
1511
1512 if (coro->on_destroy && !PL_dirty)
1513 coro->on_destroy (aTHX_ coro);
1078 1514
1079 coro->flags |= CF_DESTROYED; 1515 coro->flags |= CF_DESTROYED;
1080 1516
1081 if (coro->flags & CF_READY) 1517 if (coro->flags & CF_READY)
1082 { 1518 {
1083 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1519 /* reduce nready, as destroying a ready coro effectively unreadies it */
1084 /* alternative: look through all ready queues and remove the coro */ 1520 /* alternative: look through all ready queues and remove the coro */
1085 LOCK;
1086 --coro_nready; 1521 --coro_nready;
1087 UNLOCK;
1088 } 1522 }
1089 else 1523 else
1090 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 */
1091 1525
1092 if (coro->mainstack && coro->mainstack != main_mainstack) 1526 if (coro->mainstack
1093 { 1527 && coro->mainstack != main_mainstack
1094 struct coro temp; 1528 && coro->slot
1095 1529 && !PL_dirty)
1096 if (coro->flags & CF_RUNNING)
1097 croak ("FATAL: tried to destroy currently running coroutine");
1098
1099 save_perl (aTHX_ &temp);
1100 load_perl (aTHX_ coro);
1101
1102 coro_destroy (aTHX_ coro); 1530 coro_destruct_perl (aTHX_ coro);
1103
1104 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1105
1106 coro->mainstack = 0;
1107 }
1108 1531
1109 cctx_destroy (coro->cctx); 1532 cctx_destroy (coro->cctx);
1533 SvREFCNT_dec (coro->startcv);
1110 SvREFCNT_dec (coro->args); 1534 SvREFCNT_dec (coro->args);
1535 SvREFCNT_dec (CORO_THROW);
1111 1536
1112 if (coro->next) coro->next->prev = coro->prev; 1537 if (coro->next) coro->next->prev = coro->prev;
1113 if (coro->prev) coro->prev->next = coro->next; 1538 if (coro->prev) coro->prev->next = coro->next;
1114 if (coro == coro_first) coro_first = coro->next; 1539 if (coro == coro_first) coro_first = coro->next;
1115 1540
… …
1153# define MGf_DUP 0 1578# define MGf_DUP 0
1154#endif 1579#endif
1155}; 1580};
1156 1581
1157static void 1582static void
1158prepare_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)
1159{ 1584{
1160 ta->prev = SvSTATE (prev_sv); 1585 ta->prev = SvSTATE (prev_sv);
1161 ta->next = SvSTATE (next_sv); 1586 ta->next = SvSTATE (next_sv);
1162 TRANSFER_CHECK (*ta); 1587 TRANSFER_CHECK (*ta);
1163} 1588}
1164 1589
1165static void 1590static void
1166api_transfer (SV *prev_sv, SV *next_sv) 1591api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1167{ 1592{
1168 dTHX;
1169 struct transfer_args ta; 1593 struct coro_transfer_args ta;
1170 1594
1171 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1595 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1172 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);
1173} 1620}
1174 1621
1175/** Coro ********************************************************************/ 1622/** Coro ********************************************************************/
1176 1623
1177static void 1624INLINE void
1178coro_enq (pTHX_ SV *coro_sv) 1625coro_enq (pTHX_ struct coro *coro)
1179{ 1626{
1180 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1627 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1181}
1182 1628
1183static SV * 1629 SvREFCNT_inc_NN (coro->hv);
1184coro_deq (pTHX_ int min_prio)
1185{
1186 int prio = PRIO_MAX - PRIO_MIN;
1187 1630
1188 min_prio -= PRIO_MIN; 1631 coro->next_ready = 0;
1189 if (min_prio < 0) 1632 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1190 min_prio = 0; 1633 ready [1] = coro;
1634}
1191 1635
1636INLINE struct coro *
1637coro_deq (pTHX)
1638{
1639 int prio;
1640
1192 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1641 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1193 if (AvFILLp (coro_ready [prio]) >= 0) 1642 {
1194 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 }
1195 1652
1196 return 0; 1653 return 0;
1197} 1654}
1198 1655
1199static int 1656static int
1200api_ready (SV *coro_sv) 1657api_ready (pTHX_ SV *coro_sv)
1201{ 1658{
1202 dTHX;
1203 struct coro *coro; 1659 struct coro *coro;
1204 1660 SV *sv_hook;
1205 if (SvROK (coro_sv)) 1661 void (*xs_hook)(void);
1206 coro_sv = SvRV (coro_sv);
1207 1662
1208 coro = SvSTATE (coro_sv); 1663 coro = SvSTATE (coro_sv);
1209 1664
1210 if (coro->flags & CF_READY) 1665 if (coro->flags & CF_READY)
1211 return 0; 1666 return 0;
1212 1667
1213 coro->flags |= CF_READY; 1668 coro->flags |= CF_READY;
1214 1669
1215 LOCK; 1670 sv_hook = coro_nready ? 0 : coro_readyhook;
1216 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1671 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1672
1673 coro_enq (aTHX_ coro);
1217 ++coro_nready; 1674 ++coro_nready;
1218 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 ();
1219 1693
1220 return 1; 1694 return 1;
1221} 1695}
1222 1696
1223static int 1697static int
1224api_is_ready (SV *coro_sv) 1698api_is_ready (pTHX_ SV *coro_sv)
1225{ 1699{
1226 dTHX;
1227 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1700 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1228} 1701}
1229 1702
1230static void 1703/* expects to own a reference to next->hv */
1704INLINE void
1231prepare_schedule (pTHX_ struct transfer_args *ta) 1705prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1232{ 1706{
1233 SV *prev_sv, *next_sv;
1234
1235 for (;;)
1236 {
1237 LOCK;
1238 next_sv = coro_deq (aTHX_ PRIO_MIN);
1239
1240 /* nothing to schedule: call the idle handler */
1241 if (!next_sv)
1242 {
1243 dSP;
1244 UNLOCK;
1245
1246 ENTER;
1247 SAVETMPS;
1248
1249 PUSHMARK (SP);
1250 PUTBACK;
1251 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1252
1253 FREETMPS;
1254 LEAVE;
1255 continue;
1256 }
1257
1258 ta->next = SvSTATE (next_sv);
1259
1260 /* cannot transfer to destroyed coros, skip and look for next */
1261 if (ta->next->flags & CF_DESTROYED)
1262 {
1263 UNLOCK;
1264 SvREFCNT_dec (next_sv);
1265 /* coro_nready is already taken care of by destroy */
1266 continue;
1267 }
1268
1269 --coro_nready;
1270 UNLOCK;
1271 break;
1272 }
1273
1274 /* free this only after the transfer */
1275 prev_sv = SvRV (coro_current); 1707 SV *prev_sv = SvRV (coro_current);
1708
1276 ta->prev = SvSTATE (prev_sv); 1709 ta->prev = SvSTATE_hv (prev_sv);
1710 ta->next = next;
1711
1277 TRANSFER_CHECK (*ta); 1712 TRANSFER_CHECK (*ta);
1278 assert (ta->next->flags & CF_READY); 1713
1279 ta->next->flags &= ~CF_READY;
1280 SvRV_set (coro_current, next_sv); 1714 SvRV_set (coro_current, (SV *)next->hv);
1281 1715
1282 LOCK;
1283 free_coro_mortal (aTHX); 1716 free_coro_mortal (aTHX);
1284 coro_mortal = prev_sv; 1717 coro_mortal = prev_sv;
1285 UNLOCK;
1286} 1718}
1287 1719
1288static 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
1289prepare_cede (pTHX_ struct transfer_args *ta) 1770prepare_cede (pTHX_ struct coro_transfer_args *ta)
1290{ 1771{
1291 api_ready (coro_current); 1772 api_ready (aTHX_ coro_current);
1292 prepare_schedule (aTHX_ ta); 1773 prepare_schedule (aTHX_ ta);
1293} 1774}
1294 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
1295static int 1809static int
1296prepare_cede_notself (pTHX_ struct transfer_args *ta) 1810api_cede (pTHX)
1297{ 1811{
1298 if (coro_nready) 1812 struct coro_transfer_args ta;
1299 { 1813
1300 SV *prev = SvRV (coro_current);
1301 prepare_schedule (aTHX_ ta); 1814 prepare_cede (aTHX_ &ta);
1302 api_ready (prev); 1815
1816 if (expect_true (ta.prev != ta.next))
1817 {
1818 TRANSFER (ta, 1);
1303 return 1; 1819 return 1;
1304 } 1820 }
1305 else 1821 else
1306 return 0; 1822 return 0;
1307} 1823}
1308 1824
1309static void
1310api_schedule (void)
1311{
1312 dTHX;
1313 struct transfer_args ta;
1314
1315 prepare_schedule (aTHX_ &ta);
1316 TRANSFER (ta);
1317}
1318
1319static int 1825static int
1320api_cede (void) 1826api_cede_notself (pTHX)
1321{ 1827{
1322 dTHX; 1828 if (coro_nready)
1829 {
1323 struct transfer_args ta; 1830 struct coro_transfer_args ta;
1324 1831
1325 prepare_cede (aTHX_ &ta); 1832 prepare_cede_notself (aTHX_ &ta);
1326
1327 if (ta.prev != ta.next)
1328 {
1329 TRANSFER (ta); 1833 TRANSFER (ta, 1);
1330 return 1; 1834 return 1;
1331 } 1835 }
1332 else 1836 else
1333 return 0; 1837 return 0;
1334} 1838}
1335 1839
1336static int 1840static void
1337api_cede_notself (void)
1338{
1339 dTHX;
1340 struct transfer_args ta;
1341
1342 if (prepare_cede_notself (aTHX_ &ta))
1343 {
1344 TRANSFER (ta);
1345 return 1;
1346 }
1347 else
1348 return 0;
1349}
1350
1351static void
1352api_trace (SV *coro_sv, int flags) 1841api_trace (pTHX_ SV *coro_sv, int flags)
1353{ 1842{
1354 dTHX;
1355 struct coro *coro = SvSTATE (coro_sv); 1843 struct coro *coro = SvSTATE (coro_sv);
1356 1844
1845 if (coro->flags & CF_RUNNING)
1846 croak ("cannot enable tracing on a running coroutine, caught");
1847
1357 if (flags & CC_TRACE) 1848 if (flags & CC_TRACE)
1358 { 1849 {
1359 if (!coro->cctx) 1850 if (!coro->cctx)
1360 coro->cctx = cctx_new (); 1851 coro->cctx = cctx_new_run ();
1361 else if (!(coro->cctx->flags & CC_TRACE)) 1852 else if (!(coro->cctx->flags & CC_TRACE))
1362 croak ("cannot enable tracing on coroutine with custom stack"); 1853 croak ("cannot enable tracing on coroutine with custom stack, caught");
1363 1854
1364 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1855 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1365 } 1856 }
1366 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1857 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1367 { 1858 {
1368 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1859 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1369 1860
1370 if (coro->flags & CF_RUNNING) 1861 if (coro->flags & CF_RUNNING)
1371 PL_runops = RUNOPS_DEFAULT; 1862 PL_runops = RUNOPS_DEFAULT;
1372 else 1863 else
1373 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;
1374 } 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 }
1375} 1955}
1956
1957static void
1958slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1959{
1960 HV *hv = (HV *)SvRV (coro_current);
1961 struct coro *coro = SvSTATE_hv ((SV *)hv);
1962
1963 if (expect_true (coro->saved_deffh))
1964 {
1965 /* subsequent iteration */
1966 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1967 coro->saved_deffh = 0;
1968
1969 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1970 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1971 {
1972 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1973 coro->invoke_av = newAV ();
1974
1975 frame->prepare = prepare_nop;
1976 }
1977 else
1978 {
1979 av_clear (GvAV (PL_defgv));
1980 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1981
1982 coro->prio = 0;
1983
1984 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1985 api_trace (aTHX_ coro_current, 0);
1986
1987 frame->prepare = prepare_schedule;
1988 av_push (av_async_pool, SvREFCNT_inc (hv));
1989 }
1990 }
1991 else
1992 {
1993 /* first iteration, simply fall through */
1994 frame->prepare = prepare_nop;
1995 }
1996
1997 frame->check = slf_check_pool_handler;
1998 frame->data = (void *)coro;
1999}
2000
2001/*****************************************************************************/
2002/* rouse callback */
2003
2004#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2005
2006static void
2007coro_rouse_callback (pTHX_ CV *cv)
2008{
2009 dXSARGS;
2010 SV *data = (SV *)GENSUB_ARG;
2011
2012 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2013 {
2014 /* first call, set args */
2015 SV *coro = SvRV (data);
2016 AV *av = newAV ();
2017
2018 SvRV_set (data, (SV *)av);
2019
2020 /* better take a full copy of the arguments */
2021 while (items--)
2022 av_store (av, items, newSVsv (ST (items)));
2023
2024 api_ready (aTHX_ coro);
2025 SvREFCNT_dec (coro);
2026 }
2027
2028 XSRETURN_EMPTY;
2029}
2030
2031static int
2032slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2033{
2034 SV *data = (SV *)frame->data;
2035
2036 if (CORO_THROW)
2037 return 0;
2038
2039 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2040 return 1;
2041
2042 /* now push all results on the stack */
2043 {
2044 dSP;
2045 AV *av = (AV *)SvRV (data);
2046 int i;
2047
2048 EXTEND (SP, AvFILLp (av) + 1);
2049 for (i = 0; i <= AvFILLp (av); ++i)
2050 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2051
2052 /* we have stolen the elements, so set length to zero and free */
2053 AvFILLp (av) = -1;
2054 av_undef (av);
2055
2056 PUTBACK;
2057 }
2058
2059 return 0;
2060}
2061
2062static void
2063slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 SV *cb;
2066
2067 if (items)
2068 cb = arg [0];
2069 else
2070 {
2071 struct coro *coro = SvSTATE_current;
2072
2073 if (!coro->rouse_cb)
2074 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2075
2076 cb = sv_2mortal (coro->rouse_cb);
2077 coro->rouse_cb = 0;
2078 }
2079
2080 if (!SvROK (cb)
2081 || SvTYPE (SvRV (cb)) != SVt_PVCV
2082 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2083 croak ("Coro::rouse_wait called with illegal callback argument,");
2084
2085 {
2086 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2087 SV *data = (SV *)GENSUB_ARG;
2088
2089 frame->data = (void *)data;
2090 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2091 frame->check = slf_check_rouse_wait;
2092 }
2093}
2094
2095static SV *
2096coro_new_rouse_cb (pTHX)
2097{
2098 HV *hv = (HV *)SvRV (coro_current);
2099 struct coro *coro = SvSTATE_hv (hv);
2100 SV *data = newRV_inc ((SV *)hv);
2101 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2102
2103 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2104 SvREFCNT_dec (data); /* magicext increases the refcount */
2105
2106 SvREFCNT_dec (coro->rouse_cb);
2107 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2108
2109 return cb;
2110}
2111
2112/*****************************************************************************/
2113/* schedule-like-function opcode (SLF) */
2114
2115static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2116static const CV *slf_cv;
2117static SV **slf_argv;
2118static int slf_argc, slf_arga; /* count, allocated */
2119static I32 slf_ax; /* top of stack, for restore */
2120
2121/* this restores the stack in the case we patched the entersub, to */
2122/* recreate the stack frame as perl will on following calls */
2123/* since entersub cleared the stack */
2124static OP *
2125pp_restore (pTHX)
2126{
2127 int i;
2128 SV **SP = PL_stack_base + slf_ax;
2129
2130 PUSHMARK (SP);
2131
2132 EXTEND (SP, slf_argc + 1);
2133
2134 for (i = 0; i < slf_argc; ++i)
2135 PUSHs (sv_2mortal (slf_argv [i]));
2136
2137 PUSHs ((SV *)CvGV (slf_cv));
2138
2139 RETURNOP (slf_restore.op_first);
2140}
2141
2142static void
2143slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2144{
2145 SV **arg = (SV **)slf_frame.data;
2146
2147 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2148}
2149
2150static void
2151slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 if (items != 2)
2154 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2155
2156 frame->prepare = slf_prepare_transfer;
2157 frame->check = slf_check_nop;
2158 frame->data = (void *)arg; /* let's hope it will stay valid */
2159}
2160
2161static void
2162slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2163{
2164 frame->prepare = prepare_schedule;
2165 frame->check = slf_check_nop;
2166}
2167
2168static void
2169slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2170{
2171 struct coro *next = (struct coro *)slf_frame.data;
2172
2173 SvREFCNT_inc_NN (next->hv);
2174 prepare_schedule_to (aTHX_ ta, next);
2175}
2176
2177static void
2178slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2179{
2180 if (!items)
2181 croak ("Coro::schedule_to expects a coroutine argument, caught");
2182
2183 frame->data = (void *)SvSTATE (arg [0]);
2184 frame->prepare = slf_prepare_schedule_to;
2185 frame->check = slf_check_nop;
2186}
2187
2188static void
2189slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2190{
2191 api_ready (aTHX_ SvRV (coro_current));
2192
2193 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2194}
2195
2196static void
2197slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede;
2200 frame->check = slf_check_nop;
2201}
2202
2203static void
2204slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2205{
2206 frame->prepare = prepare_cede_notself;
2207 frame->check = slf_check_nop;
2208}
2209
2210/*
2211 * these not obviously related functions are all rolled into one
2212 * function to increase chances that they all will call transfer with the same
2213 * stack offset
2214 * SLF stands for "schedule-like-function".
2215 */
2216static OP *
2217pp_slf (pTHX)
2218{
2219 I32 checkmark; /* mark SP to see how many elements check has pushed */
2220
2221 /* set up the slf frame, unless it has already been set-up */
2222 /* the latter happens when a new coro has been started */
2223 /* or when a new cctx was attached to an existing coroutine */
2224 if (expect_true (!slf_frame.prepare))
2225 {
2226 /* first iteration */
2227 dSP;
2228 SV **arg = PL_stack_base + TOPMARK + 1;
2229 int items = SP - arg; /* args without function object */
2230 SV *gv = *sp;
2231
2232 /* do a quick consistency check on the "function" object, and if it isn't */
2233 /* for us, divert to the real entersub */
2234 if (SvTYPE (gv) != SVt_PVGV
2235 || !GvCV (gv)
2236 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2237 return PL_ppaddr[OP_ENTERSUB](aTHX);
2238
2239 if (!(PL_op->op_flags & OPf_STACKED))
2240 {
2241 /* ampersand-form of call, use @_ instead of stack */
2242 AV *av = GvAV (PL_defgv);
2243 arg = AvARRAY (av);
2244 items = AvFILLp (av) + 1;
2245 }
2246
2247 /* now call the init function, which needs to set up slf_frame */
2248 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2249 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2250
2251 /* pop args */
2252 SP = PL_stack_base + POPMARK;
2253
2254 PUTBACK;
2255 }
2256
2257 /* now that we have a slf_frame, interpret it! */
2258 /* we use a callback system not to make the code needlessly */
2259 /* complicated, but so we can run multiple perl coros from one cctx */
2260
2261 do
2262 {
2263 struct coro_transfer_args ta;
2264
2265 slf_frame.prepare (aTHX_ &ta);
2266 TRANSFER (ta, 0);
2267
2268 checkmark = PL_stack_sp - PL_stack_base;
2269 }
2270 while (slf_frame.check (aTHX_ &slf_frame));
2271
2272 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2273
2274 /* exception handling */
2275 if (expect_false (CORO_THROW))
2276 {
2277 SV *exception = sv_2mortal (CORO_THROW);
2278
2279 CORO_THROW = 0;
2280 sv_setsv (ERRSV, exception);
2281 croak (0);
2282 }
2283
2284 /* return value handling - mostly like entersub */
2285 /* make sure we put something on the stack in scalar context */
2286 if (GIMME_V == G_SCALAR)
2287 {
2288 dSP;
2289 SV **bot = PL_stack_base + checkmark;
2290
2291 if (sp == bot) /* too few, push undef */
2292 bot [1] = &PL_sv_undef;
2293 else if (sp != bot + 1) /* too many, take last one */
2294 bot [1] = *sp;
2295
2296 SP = bot + 1;
2297
2298 PUTBACK;
2299 }
2300
2301 return NORMAL;
2302}
2303
2304static void
2305api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2306{
2307 int i;
2308 SV **arg = PL_stack_base + ax;
2309 int items = PL_stack_sp - arg + 1;
2310
2311 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2312
2313 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2314 && PL_op->op_ppaddr != pp_slf)
2315 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2316
2317 CvFLAGS (cv) |= CVf_SLF;
2318 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2319 slf_cv = cv;
2320
2321 /* we patch the op, and then re-run the whole call */
2322 /* we have to put the same argument on the stack for this to work */
2323 /* and this will be done by pp_restore */
2324 slf_restore.op_next = (OP *)&slf_restore;
2325 slf_restore.op_type = OP_CUSTOM;
2326 slf_restore.op_ppaddr = pp_restore;
2327 slf_restore.op_first = PL_op;
2328
2329 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2330
2331 if (PL_op->op_flags & OPf_STACKED)
2332 {
2333 if (items > slf_arga)
2334 {
2335 slf_arga = items;
2336 free (slf_argv);
2337 slf_argv = malloc (slf_arga * sizeof (SV *));
2338 }
2339
2340 slf_argc = items;
2341
2342 for (i = 0; i < items; ++i)
2343 slf_argv [i] = SvREFCNT_inc (arg [i]);
2344 }
2345 else
2346 slf_argc = 0;
2347
2348 PL_op->op_ppaddr = pp_slf;
2349 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2350
2351 PL_op = (OP *)&slf_restore;
2352}
2353
2354/*****************************************************************************/
2355/* dynamic wind */
2356
2357static void
2358on_enterleave_call (pTHX_ SV *cb)
2359{
2360 dSP;
2361
2362 PUSHSTACK;
2363
2364 PUSHMARK (SP);
2365 PUTBACK;
2366 call_sv (cb, G_VOID | G_DISCARD);
2367 SPAGAIN;
2368
2369 POPSTACK;
2370}
2371
2372static SV *
2373coro_avp_pop_and_free (pTHX_ AV **avp)
2374{
2375 AV *av = *avp;
2376 SV *res = av_pop (av);
2377
2378 if (AvFILLp (av) < 0)
2379 {
2380 *avp = 0;
2381 SvREFCNT_dec (av);
2382 }
2383
2384 return res;
2385}
2386
2387static void
2388coro_pop_on_enter (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2391 SvREFCNT_dec (cb);
2392}
2393
2394static void
2395coro_pop_on_leave (pTHX_ void *coro)
2396{
2397 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2398 on_enterleave_call (aTHX_ sv_2mortal (cb));
2399}
2400
2401/*****************************************************************************/
2402/* PerlIO::cede */
2403
2404typedef struct
2405{
2406 PerlIOBuf base;
2407 NV next, every;
2408} PerlIOCede;
2409
2410static IV
2411PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2412{
2413 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2414
2415 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2416 self->next = nvtime () + self->every;
2417
2418 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2419}
2420
2421static SV *
2422PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2423{
2424 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2425
2426 return newSVnv (self->every);
2427}
2428
2429static IV
2430PerlIOCede_flush (pTHX_ PerlIO *f)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433 double now = nvtime ();
2434
2435 if (now >= self->next)
2436 {
2437 api_cede (aTHX);
2438 self->next = now + self->every;
2439 }
2440
2441 return PerlIOBuf_flush (aTHX_ f);
2442}
2443
2444static PerlIO_funcs PerlIO_cede =
2445{
2446 sizeof(PerlIO_funcs),
2447 "cede",
2448 sizeof(PerlIOCede),
2449 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2450 PerlIOCede_pushed,
2451 PerlIOBuf_popped,
2452 PerlIOBuf_open,
2453 PerlIOBase_binmode,
2454 PerlIOCede_getarg,
2455 PerlIOBase_fileno,
2456 PerlIOBuf_dup,
2457 PerlIOBuf_read,
2458 PerlIOBuf_unread,
2459 PerlIOBuf_write,
2460 PerlIOBuf_seek,
2461 PerlIOBuf_tell,
2462 PerlIOBuf_close,
2463 PerlIOCede_flush,
2464 PerlIOBuf_fill,
2465 PerlIOBase_eof,
2466 PerlIOBase_error,
2467 PerlIOBase_clearerr,
2468 PerlIOBase_setlinebuf,
2469 PerlIOBuf_get_base,
2470 PerlIOBuf_bufsiz,
2471 PerlIOBuf_get_ptr,
2472 PerlIOBuf_get_cnt,
2473 PerlIOBuf_set_ptrcnt,
2474};
2475
2476/*****************************************************************************/
2477/* Coro::Semaphore & Coro::Signal */
2478
2479static SV *
2480coro_waitarray_new (pTHX_ int count)
2481{
2482 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2483 AV *av = newAV ();
2484 SV **ary;
2485
2486 /* unfortunately, building manually saves memory */
2487 Newx (ary, 2, SV *);
2488 AvALLOC (av) = ary;
2489#if PERL_VERSION_ATLEAST (5,10,0)
2490 AvARRAY (av) = ary;
2491#else
2492 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2493 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2494 SvPVX ((SV *)av) = (char *)ary;
2495#endif
2496 AvMAX (av) = 1;
2497 AvFILLp (av) = 0;
2498 ary [0] = newSViv (count);
2499
2500 return newRV_noinc ((SV *)av);
2501}
2502
2503/* semaphore */
2504
2505static void
2506coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2507{
2508 SV *count_sv = AvARRAY (av)[0];
2509 IV count = SvIVX (count_sv);
2510
2511 count += adjust;
2512 SvIVX (count_sv) = count;
2513
2514 /* now wake up as many waiters as are expected to lock */
2515 while (count > 0 && AvFILLp (av) > 0)
2516 {
2517 SV *cb;
2518
2519 /* swap first two elements so we can shift a waiter */
2520 AvARRAY (av)[0] = AvARRAY (av)[1];
2521 AvARRAY (av)[1] = count_sv;
2522 cb = av_shift (av);
2523
2524 if (SvOBJECT (cb))
2525 {
2526 api_ready (aTHX_ cb);
2527 --count;
2528 }
2529 else if (SvTYPE (cb) == SVt_PVCV)
2530 {
2531 dSP;
2532 PUSHMARK (SP);
2533 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2534 PUTBACK;
2535 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2536 }
2537
2538 SvREFCNT_dec (cb);
2539 }
2540}
2541
2542static void
2543coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2544{
2545 /* call $sem->adjust (0) to possibly wake up some other waiters */
2546 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2547}
2548
2549static int
2550slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2551{
2552 AV *av = (AV *)frame->data;
2553 SV *count_sv = AvARRAY (av)[0];
2554
2555 /* if we are about to throw, don't actually acquire the lock, just throw */
2556 if (CORO_THROW)
2557 return 0;
2558 else if (SvIVX (count_sv) > 0)
2559 {
2560 SvSTATE_current->on_destroy = 0;
2561
2562 if (acquire)
2563 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2564 else
2565 coro_semaphore_adjust (aTHX_ av, 0);
2566
2567 return 0;
2568 }
2569 else
2570 {
2571 int i;
2572 /* if we were woken up but can't down, we look through the whole */
2573 /* waiters list and only add us if we aren't in there already */
2574 /* this avoids some degenerate memory usage cases */
2575
2576 for (i = 1; i <= AvFILLp (av); ++i)
2577 if (AvARRAY (av)[i] == SvRV (coro_current))
2578 return 1;
2579
2580 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2581 return 1;
2582 }
2583}
2584
2585static int
2586slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2587{
2588 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2589}
2590
2591static int
2592slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2593{
2594 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2595}
2596
2597static void
2598slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 AV *av = (AV *)SvRV (arg [0]);
2601
2602 if (SvIVX (AvARRAY (av)[0]) > 0)
2603 {
2604 frame->data = (void *)av;
2605 frame->prepare = prepare_nop;
2606 }
2607 else
2608 {
2609 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2610
2611 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2612 frame->prepare = prepare_schedule;
2613
2614 /* to avoid race conditions when a woken-up coro gets terminated */
2615 /* we arrange for a temporary on_destroy that calls adjust (0) */
2616 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2617 }
2618}
2619
2620static void
2621slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_down;
2625}
2626
2627static void
2628slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2629{
2630 if (items >= 2)
2631 {
2632 /* callback form */
2633 AV *av = (AV *)SvRV (arg [0]);
2634 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2635
2636 av_push (av, SvREFCNT_inc_NN (cb_cv));
2637
2638 if (SvIVX (AvARRAY (av)[0]) > 0)
2639 coro_semaphore_adjust (aTHX_ av, 0);
2640
2641 frame->prepare = prepare_nop;
2642 frame->check = slf_check_nop;
2643 }
2644 else
2645 {
2646 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2647 frame->check = slf_check_semaphore_wait;
2648 }
2649}
2650
2651/* signal */
2652
2653static void
2654coro_signal_wake (pTHX_ AV *av, int count)
2655{
2656 SvIVX (AvARRAY (av)[0]) = 0;
2657
2658 /* now signal count waiters */
2659 while (count > 0 && AvFILLp (av) > 0)
2660 {
2661 SV *cb;
2662
2663 /* swap first two elements so we can shift a waiter */
2664 cb = AvARRAY (av)[0];
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = cb;
2667
2668 cb = av_shift (av);
2669
2670 if (SvTYPE (cb) == SVt_PVCV)
2671 {
2672 dSP;
2673 PUSHMARK (SP);
2674 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2675 PUTBACK;
2676 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2677 }
2678 else
2679 {
2680 api_ready (aTHX_ cb);
2681 sv_setiv (cb, 0); /* signal waiter */
2682 }
2683
2684 SvREFCNT_dec (cb);
2685
2686 --count;
2687 }
2688}
2689
2690static int
2691slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2692{
2693 /* if we are about to throw, also stop waiting */
2694 return SvROK ((SV *)frame->data) && !CORO_THROW;
2695}
2696
2697static void
2698slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2699{
2700 AV *av = (AV *)SvRV (arg [0]);
2701
2702 if (items >= 2)
2703 {
2704 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2705 av_push (av, SvREFCNT_inc_NN (cb_cv));
2706
2707 if (SvIVX (AvARRAY (av)[0]))
2708 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2709
2710 frame->prepare = prepare_nop;
2711 frame->check = slf_check_nop;
2712 }
2713 else if (SvIVX (AvARRAY (av)[0]))
2714 {
2715 SvIVX (AvARRAY (av)[0]) = 0;
2716 frame->prepare = prepare_nop;
2717 frame->check = slf_check_nop;
2718 }
2719 else
2720 {
2721 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2722
2723 av_push (av, waiter);
2724
2725 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2726 frame->prepare = prepare_schedule;
2727 frame->check = slf_check_signal_wait;
2728 }
2729}
2730
2731/*****************************************************************************/
2732/* Coro::AIO */
2733
2734#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2735
2736/* helper storage struct */
2737struct io_state
2738{
2739 int errorno;
2740 I32 laststype; /* U16 in 5.10.0 */
2741 int laststatval;
2742 Stat_t statcache;
2743};
2744
2745static void
2746coro_aio_callback (pTHX_ CV *cv)
2747{
2748 dXSARGS;
2749 AV *state = (AV *)GENSUB_ARG;
2750 SV *coro = av_pop (state);
2751 SV *data_sv = newSV (sizeof (struct io_state));
2752
2753 av_extend (state, items - 1);
2754
2755 sv_upgrade (data_sv, SVt_PV);
2756 SvCUR_set (data_sv, sizeof (struct io_state));
2757 SvPOK_only (data_sv);
2758
2759 {
2760 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2761
2762 data->errorno = errno;
2763 data->laststype = PL_laststype;
2764 data->laststatval = PL_laststatval;
2765 data->statcache = PL_statcache;
2766 }
2767
2768 /* now build the result vector out of all the parameters and the data_sv */
2769 {
2770 int i;
2771
2772 for (i = 0; i < items; ++i)
2773 av_push (state, SvREFCNT_inc_NN (ST (i)));
2774 }
2775
2776 av_push (state, data_sv);
2777
2778 api_ready (aTHX_ coro);
2779 SvREFCNT_dec (coro);
2780 SvREFCNT_dec ((AV *)state);
2781}
2782
2783static int
2784slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2785{
2786 AV *state = (AV *)frame->data;
2787
2788 /* if we are about to throw, return early */
2789 /* this does not cancel the aio request, but at least */
2790 /* it quickly returns */
2791 if (CORO_THROW)
2792 return 0;
2793
2794 /* one element that is an RV? repeat! */
2795 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2796 return 1;
2797
2798 /* restore status */
2799 {
2800 SV *data_sv = av_pop (state);
2801 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2802
2803 errno = data->errorno;
2804 PL_laststype = data->laststype;
2805 PL_laststatval = data->laststatval;
2806 PL_statcache = data->statcache;
2807
2808 SvREFCNT_dec (data_sv);
2809 }
2810
2811 /* push result values */
2812 {
2813 dSP;
2814 int i;
2815
2816 EXTEND (SP, AvFILLp (state) + 1);
2817 for (i = 0; i <= AvFILLp (state); ++i)
2818 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2819
2820 PUTBACK;
2821 }
2822
2823 return 0;
2824}
2825
2826static void
2827slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2828{
2829 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2830 SV *coro_hv = SvRV (coro_current);
2831 struct coro *coro = SvSTATE_hv (coro_hv);
2832
2833 /* put our coroutine id on the state arg */
2834 av_push (state, SvREFCNT_inc_NN (coro_hv));
2835
2836 /* first see whether we have a non-zero priority and set it as AIO prio */
2837 if (coro->prio)
2838 {
2839 dSP;
2840
2841 static SV *prio_cv;
2842 static SV *prio_sv;
2843
2844 if (expect_false (!prio_cv))
2845 {
2846 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2847 prio_sv = newSViv (0);
2848 }
2849
2850 PUSHMARK (SP);
2851 sv_setiv (prio_sv, coro->prio);
2852 XPUSHs (prio_sv);
2853
2854 PUTBACK;
2855 call_sv (prio_cv, G_VOID | G_DISCARD);
2856 }
2857
2858 /* now call the original request */
2859 {
2860 dSP;
2861 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2862 int i;
2863
2864 PUSHMARK (SP);
2865
2866 /* first push all args to the stack */
2867 EXTEND (SP, items + 1);
2868
2869 for (i = 0; i < items; ++i)
2870 PUSHs (arg [i]);
2871
2872 /* now push the callback closure */
2873 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2874
2875 /* now call the AIO function - we assume our request is uncancelable */
2876 PUTBACK;
2877 call_sv ((SV *)req, G_VOID | G_DISCARD);
2878 }
2879
2880 /* now that the requets is going, we loop toll we have a result */
2881 frame->data = (void *)state;
2882 frame->prepare = prepare_schedule;
2883 frame->check = slf_check_aio_req;
2884}
2885
2886static void
2887coro_aio_req_xs (pTHX_ CV *cv)
2888{
2889 dXSARGS;
2890
2891 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2892
2893 XSRETURN_EMPTY;
2894}
2895
2896/*****************************************************************************/
2897
2898#if CORO_CLONE
2899# include "clone.c"
2900#endif
1376 2901
1377MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2902MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1378 2903
1379PROTOTYPES: DISABLE 2904PROTOTYPES: DISABLE
1380 2905
1381BOOT: 2906BOOT:
1382{ 2907{
1383#ifdef USE_ITHREADS 2908#ifdef USE_ITHREADS
1384 MUTEX_INIT (&coro_mutex); 2909# if CORO_PTHREAD
2910 coro_thx = PERL_GET_CONTEXT;
2911# endif
1385#endif 2912#endif
1386 BOOT_PAGESIZE; 2913 BOOT_PAGESIZE;
2914
2915 cctx_current = cctx_new_empty ();
1387 2916
1388 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2917 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1389 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2918 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2919
2920 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2921 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2922 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2923
2924 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2925 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2926 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1390 2927
1391 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2928 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1392 2929
1393 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2930 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1394 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2931 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1399 main_top_env = PL_top_env; 2936 main_top_env = PL_top_env;
1400 2937
1401 while (main_top_env->je_prev) 2938 while (main_top_env->je_prev)
1402 main_top_env = main_top_env->je_prev; 2939 main_top_env = main_top_env->je_prev;
1403 2940
2941 {
2942 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2943
2944 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2945 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2946
2947 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2948 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2949 }
2950
1404 coroapi.ver = CORO_API_VERSION; 2951 coroapi.ver = CORO_API_VERSION;
2952 coroapi.rev = CORO_API_REVISION;
2953
1405 coroapi.transfer = api_transfer; 2954 coroapi.transfer = api_transfer;
2955
2956 coroapi.sv_state = SvSTATE_;
2957 coroapi.execute_slf = api_execute_slf;
2958 coroapi.prepare_nop = prepare_nop;
2959 coroapi.prepare_schedule = prepare_schedule;
2960 coroapi.prepare_cede = prepare_cede;
2961 coroapi.prepare_cede_notself = prepare_cede_notself;
2962
2963 {
2964 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2965
2966 if (!svp) croak ("Time::HiRes is required");
2967 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2968
2969 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2970 }
1406 2971
1407 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2972 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1408} 2973}
1409 2974
1410SV * 2975SV *
1411new (char *klass, ...) 2976new (char *klass, ...)
2977 ALIAS:
2978 Coro::new = 1
1412 CODE: 2979 CODE:
1413{ 2980{
1414 struct coro *coro; 2981 struct coro *coro;
2982 MAGIC *mg;
1415 HV *hv; 2983 HV *hv;
2984 CV *cb;
1416 int i; 2985 int i;
2986
2987 if (items > 1)
2988 {
2989 cb = coro_sv_2cv (aTHX_ ST (1));
2990
2991 if (!ix)
2992 {
2993 if (CvISXSUB (cb))
2994 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2995
2996 if (!CvROOT (cb))
2997 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2998 }
2999 }
1417 3000
1418 Newz (0, coro, 1, struct coro); 3001 Newz (0, coro, 1, struct coro);
1419 coro->args = newAV (); 3002 coro->args = newAV ();
1420 coro->flags = CF_NEW; 3003 coro->flags = CF_NEW;
1421 3004
1422 if (coro_first) coro_first->prev = coro; 3005 if (coro_first) coro_first->prev = coro;
1423 coro->next = coro_first; 3006 coro->next = coro_first;
1424 coro_first = coro; 3007 coro_first = coro;
1425 3008
1426 coro->hv = hv = newHV (); 3009 coro->hv = hv = newHV ();
1427 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3010 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3011 mg->mg_flags |= MGf_DUP;
1428 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3012 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1429 3013
3014 if (items > 1)
3015 {
3016 av_extend (coro->args, items - 1 + ix - 1);
3017
3018 if (ix)
3019 {
3020 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3021 cb = cv_coro_run;
3022 }
3023
3024 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3025
1430 for (i = 1; i < items; i++) 3026 for (i = 2; i < items; i++)
1431 av_push (coro->args, newSVsv (ST (i))); 3027 av_push (coro->args, newSVsv (ST (i)));
3028 }
1432} 3029}
1433 OUTPUT: 3030 OUTPUT:
1434 RETVAL 3031 RETVAL
1435 3032
1436# these not obviously related functions are all rolled into the same xs
1437# function to increase chances that they all will call transfer with the same
1438# stack offset
1439void 3033void
1440_set_stacklevel (...) 3034transfer (...)
1441 ALIAS: 3035 PROTOTYPE: $$
1442 Coro::State::transfer = 1 3036 CODE:
1443 Coro::schedule = 2 3037 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1444 Coro::cede = 3
1445 Coro::cede_notself = 4
1446 CODE:
1447{
1448 struct transfer_args ta;
1449
1450 switch (ix)
1451 {
1452 case 0:
1453 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1454 ta.next = 0;
1455 break;
1456
1457 case 1:
1458 if (items != 2)
1459 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1460
1461 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1462 break;
1463
1464 case 2:
1465 prepare_schedule (aTHX_ &ta);
1466 break;
1467
1468 case 3:
1469 prepare_cede (aTHX_ &ta);
1470 break;
1471
1472 case 4:
1473 if (!prepare_cede_notself (aTHX_ &ta))
1474 XSRETURN_EMPTY;
1475
1476 break;
1477 }
1478
1479 BARRIER;
1480 TRANSFER (ta);
1481
1482 if (GIMME_V != G_VOID && ta.next != ta.prev)
1483 XSRETURN_YES;
1484}
1485 3038
1486bool 3039bool
1487_destroy (SV *coro_sv) 3040_destroy (SV *coro_sv)
1488 CODE: 3041 CODE:
1489 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3042 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1490 OUTPUT: 3043 OUTPUT:
1491 RETVAL 3044 RETVAL
1492 3045
1493void 3046void
1494_exit (code) 3047_exit (int code)
1495 int code
1496 PROTOTYPE: $ 3048 PROTOTYPE: $
1497 CODE: 3049 CODE:
1498 _exit (code); 3050 _exit (code);
1499 3051
3052SV *
3053clone (Coro::State coro)
3054 CODE:
3055{
3056#if CORO_CLONE
3057 struct coro *ncoro = coro_clone (aTHX_ coro);
3058 MAGIC *mg;
3059 /* TODO: too much duplication */
3060 ncoro->hv = newHV ();
3061 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3062 mg->mg_flags |= MGf_DUP;
3063 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3064#else
3065 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3066#endif
3067}
3068 OUTPUT:
3069 RETVAL
3070
1500int 3071int
1501cctx_stacksize (int new_stacksize = 0) 3072cctx_stacksize (int new_stacksize = 0)
3073 PROTOTYPE: ;$
1502 CODE: 3074 CODE:
1503 RETVAL = coro_stacksize; 3075 RETVAL = cctx_stacksize;
1504 if (new_stacksize) 3076 if (new_stacksize)
3077 {
1505 coro_stacksize = new_stacksize; 3078 cctx_stacksize = new_stacksize;
3079 ++cctx_gen;
3080 }
1506 OUTPUT: 3081 OUTPUT:
1507 RETVAL 3082 RETVAL
1508 3083
1509int 3084int
3085cctx_max_idle (int max_idle = 0)
3086 PROTOTYPE: ;$
3087 CODE:
3088 RETVAL = cctx_max_idle;
3089 if (max_idle > 1)
3090 cctx_max_idle = max_idle;
3091 OUTPUT:
3092 RETVAL
3093
3094int
1510cctx_count () 3095cctx_count ()
3096 PROTOTYPE:
1511 CODE: 3097 CODE:
1512 RETVAL = cctx_count; 3098 RETVAL = cctx_count;
1513 OUTPUT: 3099 OUTPUT:
1514 RETVAL 3100 RETVAL
1515 3101
1516int 3102int
1517cctx_idle () 3103cctx_idle ()
3104 PROTOTYPE:
1518 CODE: 3105 CODE:
1519 RETVAL = cctx_idle; 3106 RETVAL = cctx_idle;
1520 OUTPUT: 3107 OUTPUT:
1521 RETVAL 3108 RETVAL
1522 3109
1523void 3110void
1524list () 3111list ()
3112 PROTOTYPE:
1525 PPCODE: 3113 PPCODE:
1526{ 3114{
1527 struct coro *coro; 3115 struct coro *coro;
1528 for (coro = coro_first; coro; coro = coro->next) 3116 for (coro = coro_first; coro; coro = coro->next)
1529 if (coro->hv) 3117 if (coro->hv)
… …
1534call (Coro::State coro, SV *coderef) 3122call (Coro::State coro, SV *coderef)
1535 ALIAS: 3123 ALIAS:
1536 eval = 1 3124 eval = 1
1537 CODE: 3125 CODE:
1538{ 3126{
1539 if (coro->mainstack) 3127 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1540 { 3128 {
1541 struct coro temp; 3129 struct coro *current = SvSTATE_current;
1542 Zero (&temp, 1, struct coro);
1543 3130
1544 if (!(coro->flags & CF_RUNNING)) 3131 if (current != coro)
1545 { 3132 {
3133 PUTBACK;
1546 save_perl (aTHX_ &temp); 3134 save_perl (aTHX_ current);
1547 load_perl (aTHX_ coro); 3135 load_perl (aTHX_ coro);
3136 SPAGAIN;
1548 } 3137 }
1549 3138
1550 { 3139 PUSHSTACK;
1551 dSP; 3140
1552 ENTER;
1553 SAVETMPS;
1554 PUSHMARK (SP); 3141 PUSHMARK (SP);
1555 PUTBACK; 3142 PUTBACK;
3143
1556 if (ix) 3144 if (ix)
1557 eval_sv (coderef, 0); 3145 eval_sv (coderef, 0);
1558 else 3146 else
1559 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3147 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148
3149 POPSTACK;
1560 SPAGAIN; 3150 SPAGAIN;
1561 FREETMPS;
1562 LEAVE;
1563 PUTBACK;
1564 }
1565 3151
1566 if (!(coro->flags & CF_RUNNING)) 3152 if (current != coro)
1567 { 3153 {
3154 PUTBACK;
1568 save_perl (aTHX_ coro); 3155 save_perl (aTHX_ coro);
1569 load_perl (aTHX_ &temp); 3156 load_perl (aTHX_ current);
3157 SPAGAIN;
1570 } 3158 }
1571 } 3159 }
1572} 3160}
1573 3161
1574SV * 3162SV *
… …
1577 ALIAS: 3165 ALIAS:
1578 is_ready = CF_READY 3166 is_ready = CF_READY
1579 is_running = CF_RUNNING 3167 is_running = CF_RUNNING
1580 is_new = CF_NEW 3168 is_new = CF_NEW
1581 is_destroyed = CF_DESTROYED 3169 is_destroyed = CF_DESTROYED
3170 is_suspended = CF_SUSPENDED
1582 CODE: 3171 CODE:
1583 RETVAL = boolSV (coro->flags & ix); 3172 RETVAL = boolSV (coro->flags & ix);
1584 OUTPUT: 3173 OUTPUT:
1585 RETVAL 3174 RETVAL
1586 3175
1587void 3176void
3177throw (Coro::State self, SV *throw = &PL_sv_undef)
3178 PROTOTYPE: $;$
3179 CODE:
3180{
3181 struct coro *current = SvSTATE_current;
3182 SV **throwp = self == current ? &CORO_THROW : &self->except;
3183 SvREFCNT_dec (*throwp);
3184 SvGETMAGIC (throw);
3185 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3186}
3187
3188void
1588api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3189api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3190 PROTOTYPE: $;$
3191 C_ARGS: aTHX_ coro, flags
1589 3192
1590SV * 3193SV *
1591has_stack (Coro::State coro) 3194has_cctx (Coro::State coro)
1592 PROTOTYPE: $ 3195 PROTOTYPE: $
1593 CODE: 3196 CODE:
1594 RETVAL = boolSV (!!coro->cctx); 3197 /* maybe manage the running flag differently */
3198 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1595 OUTPUT: 3199 OUTPUT:
1596 RETVAL 3200 RETVAL
1597 3201
1598int 3202int
1599is_traced (Coro::State coro) 3203is_traced (Coro::State coro)
… …
1601 CODE: 3205 CODE:
1602 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3206 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1603 OUTPUT: 3207 OUTPUT:
1604 RETVAL 3208 RETVAL
1605 3209
1606IV 3210UV
1607rss (Coro::State coro) 3211rss (Coro::State coro)
1608 PROTOTYPE: $ 3212 PROTOTYPE: $
1609 ALIAS: 3213 ALIAS:
1610 usecount = 1 3214 usecount = 1
1611 CODE: 3215 CODE:
… …
1615 case 1: RETVAL = coro->usecount; break; 3219 case 1: RETVAL = coro->usecount; break;
1616 } 3220 }
1617 OUTPUT: 3221 OUTPUT:
1618 RETVAL 3222 RETVAL
1619 3223
3224void
3225force_cctx ()
3226 PROTOTYPE:
3227 CODE:
3228 cctx_current->idle_sp = 0;
3229
3230void
3231swap_defsv (Coro::State self)
3232 PROTOTYPE: $
3233 ALIAS:
3234 swap_defav = 1
3235 CODE:
3236 if (!self->slot)
3237 croak ("cannot swap state with coroutine that has no saved state,");
3238 else
3239 {
3240 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3241 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3242
3243 SV *tmp = *src; *src = *dst; *dst = tmp;
3244 }
3245
3246void
3247cancel (Coro::State self)
3248 CODE:
3249 coro_state_destroy (aTHX_ self);
3250 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3251
1620 3252
1621MODULE = Coro::State PACKAGE = Coro 3253MODULE = Coro::State PACKAGE = Coro
1622 3254
1623BOOT: 3255BOOT:
1624{ 3256{
1625 int i;
1626
1627 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3257 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1628 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3258 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3259 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3260 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3261 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1629 av_async_pool = get_av ("Coro::async_pool", TRUE); 3262 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3263 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3264 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3265 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1630 3266
1631 coro_current = get_sv ("Coro::current", FALSE); 3267 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1632 SvREADONLY_on (coro_current); 3268 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3269 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3270 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1633 3271
1634 coro_stash = gv_stashpv ("Coro", TRUE); 3272 coro_stash = gv_stashpv ("Coro", TRUE);
1635 3273
1636 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3274 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1637 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3275 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1638 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3276 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1639 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3277 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1640 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3278 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1641 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3279 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1642 3280
1643 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1644 coro_ready[i] = newAV ();
1645
1646 { 3281 {
1647 SV *sv = perl_get_sv("Coro::API", 1); 3282 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1648 3283
1649 coroapi.schedule = api_schedule; 3284 coroapi.schedule = api_schedule;
3285 coroapi.schedule_to = api_schedule_to;
1650 coroapi.cede = api_cede; 3286 coroapi.cede = api_cede;
1651 coroapi.cede_notself = api_cede_notself; 3287 coroapi.cede_notself = api_cede_notself;
1652 coroapi.ready = api_ready; 3288 coroapi.ready = api_ready;
1653 coroapi.is_ready = api_is_ready; 3289 coroapi.is_ready = api_is_ready;
1654 coroapi.nready = &coro_nready; 3290 coroapi.nready = coro_nready;
1655 coroapi.current = coro_current; 3291 coroapi.current = coro_current;
1656 3292
1657 GCoroAPI = &coroapi; 3293 /*GCoroAPI = &coroapi;*/
1658 sv_setiv (sv, (IV)&coroapi); 3294 sv_setiv (sv, (IV)&coroapi);
1659 SvREADONLY_on (sv); 3295 SvREADONLY_on (sv);
1660 } 3296 }
1661} 3297}
3298
3299void
3300terminate (...)
3301 CODE:
3302 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3303
3304void
3305schedule (...)
3306 CODE:
3307 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3308
3309void
3310schedule_to (...)
3311 CODE:
3312 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3313
3314void
3315cede_to (...)
3316 CODE:
3317 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3318
3319void
3320cede (...)
3321 CODE:
3322 CORO_EXECUTE_SLF_XS (slf_init_cede);
3323
3324void
3325cede_notself (...)
3326 CODE:
3327 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1662 3328
1663void 3329void
1664_set_current (SV *current) 3330_set_current (SV *current)
1665 PROTOTYPE: $ 3331 PROTOTYPE: $
1666 CODE: 3332 CODE:
1667 SvREFCNT_dec (SvRV (coro_current)); 3333 SvREFCNT_dec (SvRV (coro_current));
1668 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3334 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3335
3336void
3337_set_readyhook (SV *hook)
3338 PROTOTYPE: $
3339 CODE:
3340 SvREFCNT_dec (coro_readyhook);
3341 SvGETMAGIC (hook);
3342 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1669 3343
1670int 3344int
1671prio (Coro::State coro, int newprio = 0) 3345prio (Coro::State coro, int newprio = 0)
3346 PROTOTYPE: $;$
1672 ALIAS: 3347 ALIAS:
1673 nice = 1 3348 nice = 1
1674 CODE: 3349 CODE:
1675{ 3350{
1676 RETVAL = coro->prio; 3351 RETVAL = coro->prio;
… …
1691 3366
1692SV * 3367SV *
1693ready (SV *self) 3368ready (SV *self)
1694 PROTOTYPE: $ 3369 PROTOTYPE: $
1695 CODE: 3370 CODE:
1696 RETVAL = boolSV (api_ready (self)); 3371 RETVAL = boolSV (api_ready (aTHX_ self));
1697 OUTPUT: 3372 OUTPUT:
1698 RETVAL 3373 RETVAL
1699 3374
1700int 3375int
1701nready (...) 3376nready (...)
… …
1703 CODE: 3378 CODE:
1704 RETVAL = coro_nready; 3379 RETVAL = coro_nready;
1705 OUTPUT: 3380 OUTPUT:
1706 RETVAL 3381 RETVAL
1707 3382
1708# for async_pool speedup
1709void 3383void
1710_pool_1 (SV *cb) 3384suspend (Coro::State self)
3385 PROTOTYPE: $
1711 CODE: 3386 CODE:
1712{ 3387 self->flags |= CF_SUSPENDED;
1713 struct coro *coro = SvSTATE (coro_current);
1714 HV *hv = (HV *)SvRV (coro_current);
1715 AV *defav = GvAV (PL_defgv);
1716 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1717 AV *invoke_av;
1718 int i, len;
1719 3388
1720 if (!invoke) 3389void
1721 croak ("\3terminate\2\n"); 3390resume (Coro::State self)
3391 PROTOTYPE: $
3392 CODE:
3393 self->flags &= ~CF_SUSPENDED;
1722 3394
1723 SvREFCNT_dec (coro->saved_deffh); 3395void
1724 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3396_pool_handler (...)
3397 CODE:
3398 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1725 3399
1726 hv_store (hv, "desc", sizeof ("desc") - 1, 3400void
1727 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3401async_pool (SV *cv, ...)
3402 PROTOTYPE: &@
3403 PPCODE:
3404{
3405 HV *hv = (HV *)av_pop (av_async_pool);
3406 AV *av = newAV ();
3407 SV *cb = ST (0);
3408 int i;
1728 3409
1729 invoke_av = (AV *)SvRV (invoke); 3410 av_extend (av, items - 2);
1730 len = av_len (invoke_av); 3411 for (i = 1; i < items; ++i)
3412 av_push (av, SvREFCNT_inc_NN (ST (i)));
1731 3413
1732 sv_setsv (cb, AvARRAY (invoke_av)[0]); 3414 if ((SV *)hv == &PL_sv_undef)
1733
1734 if (len > 0)
1735 { 3415 {
1736 av_fill (defav, len - 1); 3416 PUSHMARK (SP);
1737 for (i = 0; i < len; ++i) 3417 EXTEND (SP, 2);
1738 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3418 PUSHs (sv_Coro);
3419 PUSHs ((SV *)cv_pool_handler);
3420 PUTBACK;
3421 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3422 SPAGAIN;
3423
3424 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1739 } 3425 }
1740 3426
3427 {
3428 struct coro *coro = SvSTATE_hv (hv);
3429
3430 assert (!coro->invoke_cb);
3431 assert (!coro->invoke_av);
3432 coro->invoke_cb = SvREFCNT_inc (cb);
3433 coro->invoke_av = av;
3434 }
3435
3436 api_ready (aTHX_ (SV *)hv);
3437
3438 if (GIMME_V != G_VOID)
3439 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3440 else
1741 SvREFCNT_dec (invoke); 3441 SvREFCNT_dec (hv);
1742} 3442}
1743 3443
1744void 3444SV *
1745_pool_2 (SV *cb) 3445rouse_cb ()
3446 PROTOTYPE:
1746 CODE: 3447 CODE:
1747{ 3448 RETVAL = coro_new_rouse_cb (aTHX);
1748 struct coro *coro = SvSTATE (coro_current);
1749
1750 sv_setsv (cb, &PL_sv_undef);
1751
1752 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1753 coro->saved_deffh = 0;
1754
1755 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1756 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1757 croak ("\3terminate\2\n");
1758
1759 av_clear (GvAV (PL_defgv));
1760 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1761 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1762
1763 coro->prio = 0;
1764
1765 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1766 api_trace (coro_current, 0);
1767
1768 av_push (av_async_pool, newSVsv (coro_current));
1769}
1770
1771
1772MODULE = Coro::State PACKAGE = Coro::AIO
1773
1774SV *
1775_get_state ()
1776 CODE:
1777{
1778 struct io_state *data;
1779
1780 RETVAL = newSV (sizeof (struct io_state));
1781 data = (struct io_state *)SvPVX (RETVAL);
1782 SvCUR_set (RETVAL, sizeof (struct io_state));
1783 SvPOK_only (RETVAL);
1784
1785 data->errorno = errno;
1786 data->laststype = PL_laststype;
1787 data->laststatval = PL_laststatval;
1788 data->statcache = PL_statcache;
1789}
1790 OUTPUT: 3449 OUTPUT:
1791 RETVAL 3450 RETVAL
1792 3451
1793void 3452void
1794_set_state (char *data_) 3453rouse_wait (...)
3454 PROTOTYPE: ;$
3455 PPCODE:
3456 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3457
3458void
3459on_enter (SV *block)
3460 ALIAS:
3461 on_leave = 1
1795 PROTOTYPE: $ 3462 PROTOTYPE: &
1796 CODE: 3463 CODE:
1797{ 3464{
1798 struct io_state *data = (void *)data_; 3465 struct coro *coro = SvSTATE_current;
3466 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1799 3467
1800 errno = data->errorno; 3468 block = (SV *)coro_sv_2cv (aTHX_ block);
1801 PL_laststype = data->laststype;
1802 PL_laststatval = data->laststatval;
1803 PL_statcache = data->statcache;
1804}
1805 3469
3470 if (!*avp)
3471 *avp = newAV ();
3472
3473 av_push (*avp, SvREFCNT_inc (block));
3474
3475 if (!ix)
3476 on_enterleave_call (aTHX_ block);
3477
3478 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3479 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3480 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3481}
3482
3483
3484MODULE = Coro::State PACKAGE = PerlIO::cede
3485
3486BOOT:
3487 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3488
3489
3490MODULE = Coro::State PACKAGE = Coro::Semaphore
3491
3492SV *
3493new (SV *klass, SV *count = 0)
3494 CODE:
3495{
3496 int semcnt = 1;
3497
3498 if (count)
3499 {
3500 SvGETMAGIC (count);
3501
3502 if (SvOK (count))
3503 semcnt = SvIV (count);
3504 }
3505
3506 RETVAL = sv_bless (
3507 coro_waitarray_new (aTHX_ semcnt),
3508 GvSTASH (CvGV (cv))
3509 );
3510}
3511 OUTPUT:
3512 RETVAL
3513
3514# helper for Coro::Channel and others
3515SV *
3516_alloc (int count)
3517 CODE:
3518 RETVAL = coro_waitarray_new (aTHX_ count);
3519 OUTPUT:
3520 RETVAL
3521
3522SV *
3523count (SV *self)
3524 CODE:
3525 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3526 OUTPUT:
3527 RETVAL
3528
3529void
3530up (SV *self, int adjust = 1)
3531 ALIAS:
3532 adjust = 1
3533 CODE:
3534 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3535
3536void
3537down (...)
3538 CODE:
3539 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3540
3541void
3542wait (...)
3543 CODE:
3544 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3545
3546void
3547try (SV *self)
3548 PPCODE:
3549{
3550 AV *av = (AV *)SvRV (self);
3551 SV *count_sv = AvARRAY (av)[0];
3552 IV count = SvIVX (count_sv);
3553
3554 if (count > 0)
3555 {
3556 --count;
3557 SvIVX (count_sv) = count;
3558 XSRETURN_YES;
3559 }
3560 else
3561 XSRETURN_NO;
3562}
3563
3564void
3565waiters (SV *self)
3566 PPCODE:
3567{
3568 AV *av = (AV *)SvRV (self);
3569 int wcount = AvFILLp (av) + 1 - 1;
3570
3571 if (GIMME_V == G_SCALAR)
3572 XPUSHs (sv_2mortal (newSViv (wcount)));
3573 else
3574 {
3575 int i;
3576 EXTEND (SP, wcount);
3577 for (i = 1; i <= wcount; ++i)
3578 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3579 }
3580}
3581
3582MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3583
3584void
3585_may_delete (SV *sem, int count, int extra_refs)
3586 PPCODE:
3587{
3588 AV *av = (AV *)SvRV (sem);
3589
3590 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3591 && AvFILLp (av) == 0 /* no waiters, just count */
3592 && SvIV (AvARRAY (av)[0]) == count)
3593 XSRETURN_YES;
3594
3595 XSRETURN_NO;
3596}
3597
3598MODULE = Coro::State PACKAGE = Coro::Signal
3599
3600SV *
3601new (SV *klass)
3602 CODE:
3603 RETVAL = sv_bless (
3604 coro_waitarray_new (aTHX_ 0),
3605 GvSTASH (CvGV (cv))
3606 );
3607 OUTPUT:
3608 RETVAL
3609
3610void
3611wait (...)
3612 CODE:
3613 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3614
3615void
3616broadcast (SV *self)
3617 CODE:
3618{
3619 AV *av = (AV *)SvRV (self);
3620 coro_signal_wake (aTHX_ av, AvFILLp (av));
3621}
3622
3623void
3624send (SV *self)
3625 CODE:
3626{
3627 AV *av = (AV *)SvRV (self);
3628
3629 if (AvFILLp (av))
3630 coro_signal_wake (aTHX_ av, 1);
3631 else
3632 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3633}
3634
3635IV
3636awaited (SV *self)
3637 CODE:
3638 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3639 OUTPUT:
3640 RETVAL
3641
3642
3643MODULE = Coro::State PACKAGE = Coro::AnyEvent
3644
3645BOOT:
3646 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3647
3648void
3649_schedule (...)
3650 CODE:
3651{
3652 static int incede;
3653
3654 api_cede_notself (aTHX);
3655
3656 ++incede;
3657 while (coro_nready >= incede && api_cede (aTHX))
3658 ;
3659
3660 sv_setsv (sv_activity, &PL_sv_undef);
3661 if (coro_nready >= incede)
3662 {
3663 PUSHMARK (SP);
3664 PUTBACK;
3665 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3666 }
3667
3668 --incede;
3669}
3670
3671
3672MODULE = Coro::State PACKAGE = Coro::AIO
3673
3674void
3675_register (char *target, char *proto, SV *req)
3676 CODE:
3677{
3678 CV *req_cv = coro_sv_2cv (aTHX_ req);
3679 /* newXSproto doesn't return the CV on 5.8 */
3680 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3681 sv_setpv ((SV *)slf_cv, proto);
3682 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3683}
3684

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