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Comparing Coro/Coro/State.xs (file contents):
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC vs.
Revision 1.348 by root, Wed Jun 10 00:20:26 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
… …
88/* prefer perl internal functions over our own? */ 123/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS 124#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 126#endif
92 127
93/* The next macro should declare a variable stacklevel that contains and approximation 128/* The next macros try to return the current stack pointer, in an as
94 * to the current C stack pointer. Its property is that it changes with each call 129 * portable way as possible. */
95 * and should be unique. */ 130#if __GNUC__ >= 4
96#define dSTACKLEVEL int stacklevel 131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
97#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
98 137
99#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
100 139
101#if __GNUC__ >= 3 140#if __GNUC__ >= 3
102# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
103# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
104#else 144#else
105# define attribute(x) 145# define attribute(x)
106# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
107#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
108 152
109#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
110 154
111#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
112 157
113#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
114static perl_mutex coro_mutex; 159# if CORO_PTHREAD
115# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
116# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
117#else
118# define LOCK (void)0
119# define UNLOCK (void)0
120#endif 161# endif
162#endif
121 163
122/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
123struct io_state
124{
125 int errorno;
126 I32 laststype;
127 int laststatval;
128 Stat_t statcache;
129};
130 165
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;
131static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
132static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
133static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
134static JMPENV *main_top_env; 174static JMPENV *main_top_env;
135static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
136static 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 */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
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;
137 199
138static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
139static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
140 202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
141/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
142typedef struct coro_cctx { 213typedef struct coro_cctx
214{
143 struct coro_cctx *next; 215 struct coro_cctx *next;
144 216
145 /* the stack */ 217 /* the stack */
146 void *sptr; 218 void *sptr;
147 size_t ssize; 219 size_t ssize;
… …
150 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
151 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 */
152 JMPENV *top_env; 224 JMPENV *top_env;
153 coro_context cctx; 225 coro_context cctx;
154 226
227 U32 gen;
155#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
156 int valgrind_id; 229 int valgrind_id;
157#endif 230#endif
158 char inuse, mapped; 231 unsigned char flags;
159} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
160 237
161enum { 238enum {
162 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
163 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
164 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
165 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 */
166}; 244};
167 245
168/* this is a structure representing a perl-level coroutine */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
169struct coro { 247typedef struct
170 /* the c coroutine allocated to this perl coroutine, if any */ 248{
171 coro_cctx *cctx; 249 SV *defsv;
172 250 AV *defav;
173 /* data associated with this coroutine (initial args) */ 251 SV *errsv;
174 AV *args; 252 SV *irsgv;
175 int refcnt; 253 HV *hinthv;
176 int save; /* CORO_SAVE flags */
177 int flags; /* CF_ flags */
178
179 /* optionally saved, might be zero */
180 AV *defav; /* @_ */
181 SV *defsv; /* $_ */
182 SV *errsv; /* $@ */
183 GV *deffh; /* default filehandle */
184 SV *irssv; /* $/ */
185 SV *irssv_sv; /* real $/ cache */
186
187#define VAR(name,type) type name; 254#define VAR(name,type) type name;
188# include "state.h" 255# include "state.h"
189#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);
280
281 /* statistics */
282 int usecount; /* number of transfers to this coro */
190 283
191 /* coro process data */ 284 /* coro process data */
192 int prio; 285 int prio;
286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
288
289 /* async_pool */
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;
193 297
194 /* linked list */ 298 /* linked list */
195 struct coro *next, *prev; 299 struct coro *next, *prev;
196 HV *hv; /* the perl hash associated with this coro, if any */
197}; 300};
198 301
199typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
200typedef 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 */
201 309
202/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
203 311
204#define PRIO_MAX 3 312#define PRIO_MAX 3
205#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
208#define PRIO_IDLE -3 316#define PRIO_IDLE -3
209#define PRIO_MIN -4 317#define PRIO_MIN -4
210 318
211/* for Coro.pm */ 319/* for Coro.pm */
212static SV *coro_current; 320static SV *coro_current;
213static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
214static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
215static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
216 326
217/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
218 328
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
219static 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 *
220coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
221{ 427{
222 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
223 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
224 430
225 newpadlist = newAV (); 431 newpadlist = newAV ();
226 AvREAL_off (newpadlist); 432 AvREAL_off (newpadlist);
227#if PERL_VERSION_ATLEAST (5,9,0) 433#if PERL_VERSION_ATLEAST (5,10,0)
228 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
229#else 435#else
230 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
231#endif 437#endif
232 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
233 --AvFILLp (padlist); 439 --AvFILLp (padlist);
234 440
235 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
236 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
237 443
238 return newpadlist; 444 return newpadlist;
239} 445}
240 446
241static void 447static void
242free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
243{ 449{
244 /* may be during global destruction */ 450 /* may be during global destruction */
245 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
246 { 452 {
247 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
248 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
249 { 456 {
250 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
251 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
252 { 459 I32 j = AvFILLp (av);
253 SV *sv; 460
254 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
255 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
256
257 SvREFCNT_dec (*svp);
258 }
259 } 466 }
260 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
261 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
262 } 472 }
263} 473}
264 474
265static int 475static int
… …
270 480
271 /* casting is fun. */ 481 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
274 484
275 SvREFCNT_dec (av); 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
276 486
277 return 0; 487 return 0;
278} 488}
279 489
280#define PERL_MAGIC_coro PERL_MAGIC_ext 490static MGVTBL coro_cv_vtbl = {
281 491 0, 0, 0, 0,
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 492 coro_cv_free
283 493};
284#define CORO_MAGIC(cv) \
285 SvMAGIC (cv) \
286 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
287 ? SvMAGIC (cv) \
288 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
289 : 0
290 494
291/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
292static void 496static void
293get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
294{ 498{
295 MAGIC *mg = CORO_MAGIC (cv); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
296 AV *av; 500 AV *av;
297 501
298 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
299 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
300 else 504 else
301 { 505 {
302#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
303 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
304 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
305 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
306 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
307 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
308#else 513#else
309 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
310#endif 515#endif
311 } 516 }
312} 517}
313 518
314static void 519static void
315put_padlist (pTHX_ CV *cv) 520put_padlist (pTHX_ CV *cv)
316{ 521{
317 MAGIC *mg = CORO_MAGIC (cv); 522 MAGIC *mg = CORO_MAGIC_cv (cv);
318 AV *av; 523 AV *av;
319 524
320 if (!mg) 525 if (expect_false (!mg))
321 { 526 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
322 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
323 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
324 mg->mg_virtual = &vtbl_coro;
325 mg->mg_obj = (SV *)newAV ();
326 }
327 527
328 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
329 529
330 if (AvFILLp (av) >= AvMAX (av)) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
331 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
332 532
333 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
334} 534}
335 535
336/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
337 537
338#define SB do { 538static void
339#define SE } while (0) 539on_enterleave_call (pTHX_ SV *cb);
340
341#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
342 540
343static void 541static void
344load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
345{ 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
346#define VAR(name,type) PL_ ## name = c->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
347# include "state.h" 556 # include "state.h"
348#undef VAR 557 #undef VAR
349
350 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
354
355 if (c->irssv)
356 {
357 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
358 {
359 SvREFCNT_dec (c->irssv);
360 c->irssv = 0;
361 }
362 else
363 {
364 REPLACE_SV (PL_rs, c->irssv);
365 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
366 sv_setsv (c->irssv_sv, PL_rs);
367 }
368 }
369 558
370 { 559 {
371 dSP; 560 dSP;
561
372 CV *cv; 562 CV *cv;
373 563
374 /* now do the ugly restore mess */ 564 /* now do the ugly restore mess */
375 while ((cv = (CV *)POPs)) 565 while (expect_true (cv = (CV *)POPs))
376 { 566 {
377 put_padlist (aTHX_ cv); /* mark this padlist as available */ 567 put_padlist (aTHX_ cv); /* mark this padlist as available */
378 CvDEPTH (cv) = PTR2IV (POPs); 568 CvDEPTH (cv) = PTR2IV (POPs);
379 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
380 } 570 }
381 571
382 PUTBACK; 572 PUTBACK;
383 } 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 }
384} 585}
385 586
386static void 587static void
387save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
388{ 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
389 { 601 {
390 dSP; 602 dSP;
391 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
392 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
393 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
399 611
400 XPUSHs (Nullsv); 612 XPUSHs (Nullsv);
401 /* this loop was inspired by pp_caller */ 613 /* this loop was inspired by pp_caller */
402 for (;;) 614 for (;;)
403 { 615 {
404 while (cxix >= 0) 616 while (expect_true (cxix >= 0))
405 { 617 {
406 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
407 619
408 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
409 { 621 {
410 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
411 623
412 if (CvDEPTH (cv)) 624 if (expect_true (CvDEPTH (cv)))
413 { 625 {
414 EXTEND (SP, 3); 626 EXTEND (SP, 3);
415 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
416 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
417 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
418 630
419 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
420 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
421 } 633 }
422 } 634 }
423 } 635 }
424 636
425 if (top_si->si_type == PERLSI_MAIN) 637 if (expect_true (top_si->si_type == PERLSI_MAIN))
426 break; 638 break;
427 639
428 top_si = top_si->si_prev; 640 top_si = top_si->si_prev;
429 ccstk = top_si->si_cxstack; 641 ccstk = top_si->si_cxstack;
430 cxix = top_si->si_cxix; 642 cxix = top_si->si_cxix;
431 } 643 }
432 644
433 PUTBACK; 645 PUTBACK;
434 } 646 }
435 647
436 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 648 /* allocate some space on the context stack for our purposes */
437 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 649 /* we manually unroll here, as usually 2 slots is enough */
438 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 650 if (SLOT_COUNT >= 1) CXINC;
439 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 651 if (SLOT_COUNT >= 2) CXINC;
440 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 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 */
441 659
660 c->mainstack = PL_mainstack;
661
662 {
663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
664
665 slot->defav = GvAV (PL_defgv);
666 slot->defsv = DEFSV;
667 slot->errsv = ERRSV;
668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
670
442#define VAR(name,type)c->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
443# include "state.h" 672 # include "state.h"
444#undef VAR 673 #undef VAR
674 }
445} 675}
446 676
447/* 677/*
448 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
449 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
450 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
451 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
452 */ 682 */
453#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
454# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
455#else 685#else
456static void 686static void
457coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
458{ 688{
459 PL_curstackinfo = new_stackinfo(64, 6); 689 PL_curstackinfo = new_stackinfo(32, 8);
460 PL_curstackinfo->si_type = PERLSI_MAIN; 690 PL_curstackinfo->si_type = PERLSI_MAIN;
461 PL_curstack = PL_curstackinfo->si_stack; 691 PL_curstack = PL_curstackinfo->si_stack;
462 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
463 693
464 PL_stack_base = AvARRAY(PL_curstack); 694 PL_stack_base = AvARRAY(PL_curstack);
465 PL_stack_sp = PL_stack_base; 695 PL_stack_sp = PL_stack_base;
466 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
467 697
468 New(50,PL_tmps_stack,64,SV*); 698 New(50,PL_tmps_stack,32,SV*);
469 PL_tmps_floor = -1; 699 PL_tmps_floor = -1;
470 PL_tmps_ix = -1; 700 PL_tmps_ix = -1;
471 PL_tmps_max = 64; 701 PL_tmps_max = 32;
472 702
473 New(54,PL_markstack,16,I32); 703 New(54,PL_markstack,16,I32);
474 PL_markstack_ptr = PL_markstack; 704 PL_markstack_ptr = PL_markstack;
475 PL_markstack_max = PL_markstack + 16; 705 PL_markstack_max = PL_markstack + 16;
476 706
477#ifdef SET_MARK_OFFSET 707#ifdef SET_MARK_OFFSET
478 SET_MARK_OFFSET; 708 SET_MARK_OFFSET;
479#endif 709#endif
480 710
481 New(54,PL_scopestack,16,I32); 711 New(54,PL_scopestack,8,I32);
482 PL_scopestack_ix = 0; 712 PL_scopestack_ix = 0;
483 PL_scopestack_max = 16; 713 PL_scopestack_max = 8;
484 714
485 New(54,PL_savestack,64,ANY); 715 New(54,PL_savestack,24,ANY);
486 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
487 PL_savestack_max = 64; 717 PL_savestack_max = 24;
488 718
489#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
490 New(54,PL_retstack,4,OP*); 720 New(54,PL_retstack,4,OP*);
491 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
492 PL_retstack_max = 4; 722 PL_retstack_max = 4;
493#endif 723#endif
494} 724}
… …
496 726
497/* 727/*
498 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
499 */ 729 */
500static void 730static void
501coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
502{ 732{
503 if (!IN_DESTRUCT)
504 {
505 /* restore all saved variables and stuff */
506 LEAVE_SCOPE (0);
507 assert (PL_tmps_floor == -1);
508
509 /* free all temporaries */
510 FREETMPS;
511 assert (PL_tmps_ix == -1);
512
513 /* unwind all extra stacks */
514 POPSTACK_TO (PL_mainstack);
515
516 /* unwind main stack */
517 dounwind (-1);
518 }
519
520 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
521 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
522 735
523 while (PL_curstackinfo) 736 while (PL_curstackinfo)
524 { 737 {
… …
534 747
535 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
536 Safefree (PL_markstack); 749 Safefree (PL_markstack);
537 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
538 Safefree (PL_savestack); 751 Safefree (PL_savestack);
539#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
540 Safefree (PL_retstack); 753 Safefree (PL_retstack);
541#endif 754#endif
542} 755}
543 756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
765
544static size_t 766static size_t
545coro_rss (struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
546{ 768{
547 size_t rss = sizeof (coro); 769 size_t rss = sizeof (*coro);
548 770
549 if (coro->mainstack) 771 if (coro->mainstack)
550 { 772 {
551 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
552 { 774 {
553 #define VAR(name,type)coro->name = PL_ ## name; 775 #define SYM(sym) PL_ ## sym
554 # include "state.h" 776 CORO_RSS;
555 #undef VAR 777 #undef SYM
556 } 778 }
557 779 else
558 rss += sizeof (coro->curstackinfo); 780 {
559 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 781 #define SYM(sym) coro->slot->sym
560 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 782 CORO_RSS;
561 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 783 #undef SYM
562 rss += coro->tmps_max * sizeof (SV *); 784 }
563 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
564 rss += coro->scopestack_max * sizeof (I32);
565 rss += coro->savestack_max * sizeof (ANY);
566
567#if !PERL_VERSION_ATLEAST (5,9,0)
568 rss += coro->retstack_max * sizeof (OP *);
569#endif
570 } 785 }
571 786
572 return rss; 787 return rss;
573} 788}
574 789
575/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
576 791
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 */
577static 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 */
578setup_coro (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
579{ 902{
580 /* 903 /*
581 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
582 */ 905 */
583 coro_init_stacks (aTHX); 906 coro_init_stacks (aTHX);
584 907
908 PL_runops = RUNOPS_DEFAULT;
585 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
586 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
587 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
588 PL_curpm = 0; 915 PL_curpm = 0;
916 PL_curpad = 0;
589 PL_localizing = 0; 917 PL_localizing = 0;
590 PL_dirty = 0; 918 PL_dirty = 0;
591 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);
928
929 GvSV (PL_defgv) = newSV (0);
930 GvAV (PL_defgv) = coro->args; coro->args = 0;
931 GvSV (PL_errgv) = newSV (0);
932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
934 PL_rs = newSVsv (GvSV (irsgv));
935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
592 936
593 { 937 {
594 dSP; 938 dSP;
595 LOGOP myop; 939 UNOP myop;
596 940
597 SvREFCNT_dec (GvAV (PL_defgv));
598 GvAV (PL_defgv) = coro->args; coro->args = 0;
599
600 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
601 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
602 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
603 945
604 PUSHMARK (SP); 946 PUSHMARK (SP);
605 XPUSHs (av_shift (GvAV (PL_defgv))); 947 PUSHs ((SV *)coro->startcv);
606 PUTBACK; 948 PUTBACK;
607 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
608 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN;
610 } 951 }
611 952
612 ENTER; /* necessary e.g. for dounwind */ 953 /* this newly created coroutine might be run on an existing cctx which most
613} 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 */
614 958
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
615static void 971static void
972coro_unwind_stacks (pTHX)
973{
974 if (!IN_DESTRUCT)
975 {
976 /* restore all saved variables and stuff */
977 LEAVE_SCOPE (0);
978 assert (PL_tmps_floor == -1);
979
980 /* free all temporaries */
981 FREETMPS;
982 assert (PL_tmps_ix == -1);
983
984 /* unwind all extra stacks */
985 POPSTACK_TO (PL_mainstack);
986
987 /* unwind main stack */
988 dounwind (-1);
989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
996
997 SvREFCNT_dec (GvSV (PL_defgv));
998 SvREFCNT_dec (GvAV (PL_defgv));
999 SvREFCNT_dec (GvSV (PL_errgv));
1000 SvREFCNT_dec (PL_defoutgv);
1001 SvREFCNT_dec (PL_rs);
1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
1004
1005 SvREFCNT_dec (PL_diehook);
1006 SvREFCNT_dec (PL_warnhook);
1007
1008 SvREFCNT_dec (coro->saved_deffh);
1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
1012
1013 coro_destruct_stacks (aTHX);
1014}
1015
1016INLINE void
616free_coro_mortal (pTHX) 1017free_coro_mortal (pTHX)
617{ 1018{
618 if (coro_mortal) 1019 if (expect_true (coro_mortal))
619 { 1020 {
620 SvREFCNT_dec (coro_mortal); 1021 SvREFCNT_dec (coro_mortal);
621 coro_mortal = 0; 1022 coro_mortal = 0;
622 } 1023 }
623} 1024}
624 1025
625/* inject a fake call to Coro::State::_cctx_init into the execution */ 1026static int
626/* _cctx_init should be careful, as it could be called at almost any time */ 1027runops_trace (pTHX)
627/* during execution of a perl program */ 1028{
1029 COP *oldcop = 0;
1030 int oldcxix = -2;
1031
1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1033 {
1034 PERL_ASYNC_CHECK ();
1035
1036 if (cctx_current->flags & CC_TRACE_ALL)
1037 {
1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1039 {
1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1041 SV **bot, **top;
1042 AV *av = newAV (); /* return values */
1043 SV **cb;
1044 dSP;
1045
1046 GV *gv = CvGV (cx->blk_sub.cv);
1047 SV *fullname = sv_2mortal (newSV (0));
1048 if (isGV (gv))
1049 gv_efullname3 (fullname, gv, 0);
1050
1051 bot = PL_stack_base + cx->blk_oldsp + 1;
1052 top = cx->blk_gimme == G_ARRAY ? SP + 1
1053 : cx->blk_gimme == G_SCALAR ? bot + 1
1054 : bot;
1055
1056 av_extend (av, top - bot);
1057 while (bot < top)
1058 av_push (av, SvREFCNT_inc_NN (*bot++));
1059
1060 PL_runops = RUNOPS_DEFAULT;
1061 ENTER;
1062 SAVETMPS;
1063 EXTEND (SP, 3);
1064 PUSHMARK (SP);
1065 PUSHs (&PL_sv_no);
1066 PUSHs (fullname);
1067 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1068 PUTBACK;
1069 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1070 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1071 SPAGAIN;
1072 FREETMPS;
1073 LEAVE;
1074 PL_runops = runops_trace;
1075 }
1076
1077 if (oldcop != PL_curcop)
1078 {
1079 oldcop = PL_curcop;
1080
1081 if (PL_curcop != &PL_compiling)
1082 {
1083 SV **cb;
1084
1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1086 {
1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1088
1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1090 {
1091 dSP;
1092 GV *gv = CvGV (cx->blk_sub.cv);
1093 SV *fullname = sv_2mortal (newSV (0));
1094
1095 if (isGV (gv))
1096 gv_efullname3 (fullname, gv, 0);
1097
1098 PL_runops = RUNOPS_DEFAULT;
1099 ENTER;
1100 SAVETMPS;
1101 EXTEND (SP, 3);
1102 PUSHMARK (SP);
1103 PUSHs (&PL_sv_yes);
1104 PUSHs (fullname);
1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1106 PUTBACK;
1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1109 SPAGAIN;
1110 FREETMPS;
1111 LEAVE;
1112 PL_runops = runops_trace;
1113 }
1114
1115 oldcxix = cxstack_ix;
1116 }
1117
1118 if (cctx_current->flags & CC_TRACE_LINE)
1119 {
1120 dSP;
1121
1122 PL_runops = RUNOPS_DEFAULT;
1123 ENTER;
1124 SAVETMPS;
1125 EXTEND (SP, 3);
1126 PL_runops = RUNOPS_DEFAULT;
1127 PUSHMARK (SP);
1128 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1129 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1130 PUTBACK;
1131 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1132 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1133 SPAGAIN;
1134 FREETMPS;
1135 LEAVE;
1136 PL_runops = runops_trace;
1137 }
1138 }
1139 }
1140 }
1141 }
1142
1143 TAINT_NOT;
1144 return 0;
1145}
1146
1147static struct CoroSLF cctx_ssl_frame;
1148
1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
628static void NOINLINE 1164static void NOINLINE
629prepare_cctx (pTHX_ coro_cctx *cctx) 1165cctx_prepare (pTHX)
630{ 1166{
631 dSP; 1167 PL_top_env = &PL_start_env;
632 LOGOP myop;
633 1168
634 Zero (&myop, 1, LOGOP); 1169 if (cctx_current->flags & CC_TRACE)
635 myop.op_next = PL_op; 1170 PL_runops = runops_trace;
636 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
637 1171
638 PUSHMARK (SP); 1172 /* we already must be executing an SLF op, there is no other valid way
639 EXTEND (SP, 2); 1173 * that can lead to creation of a new cctx */
640 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
641 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
642 PUTBACK; 1176
643 PL_op = (OP *)&myop; 1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
644 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1178 cctx_ssl_frame = slf_frame;
645 SPAGAIN; 1179
1180 slf_frame.prepare = slf_prepare_set_stacklevel;
1181 slf_frame.check = slf_check_set_stacklevel;
1182}
1183
1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
646} 1189}
647 1190
648/* 1191/*
649 * this is a _very_ stripped down perl interpreter ;) 1192 * this is a _very_ stripped down perl interpreter ;)
650 */ 1193 */
651static void 1194static void
652coro_run (void *arg) 1195cctx_run (void *arg)
653{ 1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
654 dTHX; 1203 dTHX;
655 1204
656 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1205 /* normally we would need to skip the entersub here */
657 UNLOCK; 1206 /* not doing so will re-execute it, which is exactly what we want */
1207 /* PL_nop = PL_nop->op_next */
658 1208
659 PL_top_env = &PL_start_env;
660
661 /* inject a fake subroutine call to cctx_init */ 1209 /* inject a fake subroutine call to cctx_init */
662 prepare_cctx (aTHX_ (coro_cctx *)arg); 1210 cctx_prepare (aTHX);
663 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
664 /* somebody or something will hit me for both perl_run and PL_restartop */ 1215 /* somebody or something will hit me for both perl_run and PL_restartop */
665 PL_restartop = PL_op; 1216 PL_restartop = PL_op;
666 perl_run (PL_curinterp); 1217 perl_run (PL_curinterp);
667
668 /* 1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
669 * If perl-run returns we assume exit() was being called or the coro 1224 * If perl-run returns we assume exit() was being called or the coro
670 * fell off the end, which seems to be the only valid (non-bug) 1225 * fell off the end, which seems to be the only valid (non-bug)
671 * reason for perl_run to return. We try to exit by jumping to the 1226 * reason for perl_run to return. We try to exit by jumping to the
672 * bootstrap-time "top" top_env, as we cannot restore the "main" 1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
673 * coroutine as Coro has no such concept 1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
674 */ 1231 */
675 PL_top_env = main_top_env; 1232 PL_top_env = main_top_env;
676 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
677} 1235}
678 1236
679static coro_cctx * 1237static coro_cctx *
680cctx_new () 1238cctx_new ()
681{ 1239{
682 coro_cctx *cctx; 1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
683 void *stack_start; 1269 void *stack_start;
684 size_t stack_size; 1270 size_t stack_size;
685 1271
686 ++cctx_count;
687
688 Newz (0, cctx, 1, coro_cctx);
689
690#if HAVE_MMAP 1272#if HAVE_MMAP
691
692 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
693 /* mmap supposedly does allocate-on-write for us */ 1274 /* mmap supposedly does allocate-on-write for us */
694 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
695 1276
696 if (cctx->sptr != (void *)-1) 1277 if (cctx->sptr != (void *)-1)
697 { 1278 {
698# if CORO_STACKGUARD 1279 #if CORO_STACKGUARD
699 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
700# endif 1281 #endif
701 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
702 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
703 cctx->mapped = 1; 1284 cctx->flags |= CC_MAPPED;
704 } 1285 }
705 else 1286 else
706#endif 1287#endif
707 { 1288 {
708 cctx->ssize = coro_stacksize * (long)sizeof (long); 1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
709 New (0, cctx->sptr, coro_stacksize, long); 1290 New (0, cctx->sptr, cctx_stacksize, long);
710 1291
711 if (!cctx->sptr) 1292 if (!cctx->sptr)
712 { 1293 {
713 perror ("FATAL: unable to allocate stack for coroutine"); 1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
714 _exit (EXIT_FAILURE); 1295 _exit (EXIT_FAILURE);
715 } 1296 }
716 1297
717 stack_start = cctx->sptr; 1298 stack_start = cctx->sptr;
718 stack_size = cctx->ssize; 1299 stack_size = cctx->ssize;
719 } 1300 }
720 1301
721 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
722 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
723 1307
724 return cctx; 1308 return cctx;
725} 1309}
726 1310
727static void 1311static void
728cctx_destroy (coro_cctx *cctx) 1312cctx_destroy (coro_cctx *cctx)
729{ 1313{
730 if (!cctx) 1314 if (!cctx)
731 return; 1315 return;
732 1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
733 --cctx_count; 1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
734 1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
735#if CORO_USE_VALGRIND 1325 #if CORO_USE_VALGRIND
736 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
737#endif 1327 #endif
738 1328
739#if HAVE_MMAP 1329#if HAVE_MMAP
740 if (cctx->mapped) 1330 if (cctx->flags & CC_MAPPED)
741 munmap (cctx->sptr, cctx->ssize); 1331 munmap (cctx->sptr, cctx->ssize);
742 else 1332 else
743#endif 1333#endif
744 Safefree (cctx->sptr); 1334 Safefree (cctx->sptr);
1335 }
745 1336
746 Safefree (cctx); 1337 Safefree (cctx);
747} 1338}
1339
1340/* wether this cctx should be destructed */
1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
748 1342
749static coro_cctx * 1343static coro_cctx *
750cctx_get (pTHX) 1344cctx_get (pTHX)
751{ 1345{
752 while (cctx_first) 1346 while (expect_true (cctx_first))
753 { 1347 {
754 coro_cctx *cctx = cctx_first; 1348 coro_cctx *cctx = cctx_first;
755 cctx_first = cctx->next; 1349 cctx_first = cctx->next;
756 --cctx_idle; 1350 --cctx_idle;
757 1351
758 if (cctx->ssize >= coro_stacksize) 1352 if (expect_true (!CCTX_EXPIRED (cctx)))
759 return cctx; 1353 return cctx;
760 1354
761 cctx_destroy (cctx); 1355 cctx_destroy (cctx);
762 } 1356 }
763 1357
764 PL_op = PL_op->op_next;
765 return cctx_new (); 1358 return cctx_new_run ();
766} 1359}
767 1360
768static void 1361static void
769cctx_put (coro_cctx *cctx) 1362cctx_put (coro_cctx *cctx)
770{ 1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
771 /* free another cctx if overlimit */ 1366 /* free another cctx if overlimit */
772 if (cctx_idle >= MAX_IDLE_CCTX) 1367 if (expect_false (cctx_idle >= cctx_max_idle))
773 { 1368 {
774 coro_cctx *first = cctx_first; 1369 coro_cctx *first = cctx_first;
775 cctx_first = first->next; 1370 cctx_first = first->next;
776 --cctx_idle; 1371 --cctx_idle;
777 1372
778 assert (!first->inuse);
779 cctx_destroy (first); 1373 cctx_destroy (first);
780 } 1374 }
781 1375
782 ++cctx_idle; 1376 ++cctx_idle;
783 cctx->next = cctx_first; 1377 cctx->next = cctx_first;
784 cctx_first = cctx; 1378 cctx_first = cctx;
785} 1379}
786 1380
787/** coroutine switching *****************************************************/ 1381/** coroutine switching *****************************************************/
788 1382
789/* never call directly, always through the coro_state_transfer global variable */ 1383static void
790static void NOINLINE
791transfer (pTHX_ struct coro *prev, struct coro *next) 1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1388 if (expect_true (prev != next))
1389 {
1390 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1392
1393 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1395
1396#if !PERL_VERSION_ATLEAST (5,10,0)
1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1399#endif
1400 }
1401}
1402
1403/* always use the TRANSFER macro */
1404static void NOINLINE /* noinline so we have a fixed stackframe */
1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
792{ 1406{
793 dSTACKLEVEL; 1407 dSTACKLEVEL;
794 1408
795 /* sometimes transfer is only called to set idle_sp */ 1409 /* sometimes transfer is only called to set idle_sp */
796 if (!next) 1410 if (expect_false (!prev))
797 { 1411 {
798 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1412 cctx_current->idle_sp = STACKLEVEL;
799 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
800 }
801 else if (prev != next)
802 { 1414 }
1415 else if (expect_true (prev != next))
1416 {
803 coro_cctx *prev__cctx; 1417 coro_cctx *cctx_prev;
804 1418
805 if (prev->flags & CF_NEW) 1419 if (expect_false (prev->flags & CF_NEW))
806 { 1420 {
807 /* create a new empty context */ 1421 /* create a new empty/source context */
808 Newz (0, prev->cctx, 1, coro_cctx);
809 prev->cctx->inuse = 1;
810 prev->flags &= ~CF_NEW; 1422 prev->flags &= ~CF_NEW;
811 prev->flags |= CF_RUNNING; 1423 prev->flags |= CF_RUNNING;
812 } 1424 }
813 1425
814 /*TODO: must not croak here */
815 if (!prev->flags & CF_RUNNING)
816 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
817
818 if (next->flags & CF_RUNNING)
819 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
820
821 if (next->flags & CF_DESTROYED)
822 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
823
824 prev->flags &= ~CF_RUNNING; 1426 prev->flags &= ~CF_RUNNING;
825 next->flags |= CF_RUNNING; 1427 next->flags |= CF_RUNNING;
826 1428
827 LOCK; 1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
828 1431
829 if (next->flags & CF_NEW) 1432 if (expect_false (next->flags & CF_NEW))
830 { 1433 {
831 /* need to start coroutine */ 1434 /* need to start coroutine */
832 next->flags &= ~CF_NEW; 1435 next->flags &= ~CF_NEW;
833 /* first get rid of the old state */
834 save_perl (aTHX_ prev);
835 /* setup coroutine call */ 1436 /* setup coroutine call */
836 setup_coro (aTHX_ next); 1437 coro_setup (aTHX_ next);
837 /* need a new stack */
838 assert (!next->cctx);
839 } 1438 }
840 else 1439 else
1440 load_perl (aTHX_ next);
1441
1442 /* possibly untie and reuse the cctx */
1443 if (expect_true (
1444 cctx_current->idle_sp == STACKLEVEL
1445 && !(cctx_current->flags & CC_TRACE)
1446 && !force_cctx
1447 ))
841 { 1448 {
842 /* coroutine already started */ 1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
843 save_perl (aTHX_ prev); 1450 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
844 load_perl (aTHX_ next); 1451
1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1455 if (expect_true (!next->cctx))
1456 next->cctx = cctx_get (aTHX);
1457
1458 cctx_put (cctx_current);
845 } 1459 }
1460 else
1461 prev->cctx = cctx_current;
846 1462
847 prev__cctx = prev->cctx; 1463 ++next->usecount;
848 1464
849 /* possibly "free" the cctx */ 1465 cctx_prev = cctx_current;
850 if (prev__cctx->idle_sp == STACKLEVEL) 1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1467
1468 next->cctx = 0;
1469
1470 if (expect_false (cctx_prev != cctx_current))
851 { 1471 {
852 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1472 cctx_prev->top_env = PL_top_env;
853 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1473 PL_top_env = cctx_current->top_env;
854 1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
855 prev->cctx = 0;
856
857 cctx_put (prev__cctx);
858 prev__cctx->inuse = 0;
859 } 1475 }
860 1476
861 if (!next->cctx) 1477 transfer_tail (aTHX);
862 {
863 next->cctx = cctx_get (aTHX);
864 assert (!next->cctx->inuse);
865 next->cctx->inuse = 1;
866 }
867
868 if (prev__cctx != next->cctx)
869 {
870 prev__cctx->top_env = PL_top_env;
871 PL_top_env = next->cctx->top_env;
872 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
873 }
874
875 free_coro_mortal (aTHX);
876 UNLOCK;
877 } 1478 }
878} 1479}
879 1480
880struct transfer_args 1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
881{
882 struct coro *prev, *next;
883};
884
885#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
886 1483
887/** high level stuff ********************************************************/ 1484/** high level stuff ********************************************************/
888 1485
889static int 1486static int
890coro_state_destroy (pTHX_ struct coro *coro) 1487coro_state_destroy (pTHX_ struct coro *coro)
891{ 1488{
892 if (coro->flags & CF_DESTROYED) 1489 if (coro->flags & CF_DESTROYED)
893 return 0; 1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
894 1494
895 coro->flags |= CF_DESTROYED; 1495 coro->flags |= CF_DESTROYED;
896 1496
897 if (coro->flags & CF_READY) 1497 if (coro->flags & CF_READY)
898 { 1498 {
899 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
900 /* alternative: look through all ready queues and remove the coro */ 1500 /* alternative: look through all ready queues and remove the coro */
901 LOCK;
902 --coro_nready; 1501 --coro_nready;
903 UNLOCK;
904 } 1502 }
905 else 1503 else
906 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
907 1505
908 if (coro->mainstack && coro->mainstack != main_mainstack) 1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
909 { 1510 {
910 struct coro temp; 1511 struct coro *current = SvSTATE_current;
911 1512
912 assert (!(coro->flags & CF_RUNNING)); 1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
913 1514
914 Zero (&temp, 1, struct coro);
915 temp.save = CORO_SAVE_ALL;
916
917 if (coro->flags & CF_RUNNING)
918 croak ("FATAL: tried to destroy currently running coroutine");
919
920 save_perl (aTHX_ &temp); 1515 save_perl (aTHX_ current);
921 load_perl (aTHX_ coro); 1516 load_perl (aTHX_ coro);
922 1517
923 coro_destroy_stacks (aTHX); 1518 coro_destruct_perl (aTHX_ coro);
924 1519
925 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1520 load_perl (aTHX_ current);
926 1521
927 coro->mainstack = 0; 1522 coro->slot = 0;
928 } 1523 }
929 1524
930 cctx_destroy (coro->cctx); 1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
931 SvREFCNT_dec (coro->args); 1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
932 1529
933 if (coro->next) coro->next->prev = coro->prev; 1530 if (coro->next) coro->next->prev = coro->prev;
934 if (coro->prev) coro->prev->next = coro->next; 1531 if (coro->prev) coro->prev->next = coro->next;
935 if (coro == coro_first) coro_first = coro->next; 1532 if (coro == coro_first) coro_first = coro->next;
936 1533
… …
973#else 1570#else
974# define MGf_DUP 0 1571# define MGf_DUP 0
975#endif 1572#endif
976}; 1573};
977 1574
978static struct coro *
979SvSTATE_ (pTHX_ SV *coro)
980{
981 HV *stash;
982 MAGIC *mg;
983
984 if (SvROK (coro))
985 coro = SvRV (coro);
986
987 stash = SvSTASH (coro);
988 if (stash != coro_stash && stash != coro_state_stash)
989 {
990 /* very slow, but rare, check */
991 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
992 croak ("Coro::State object required");
993 }
994
995 mg = CORO_MAGIC (coro);
996 return (struct coro *)mg->mg_ptr;
997}
998
999#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1000
1001static void 1575static void
1002prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1003{ 1577{
1004 ta->prev = SvSTATE (prev_sv); 1578 ta->prev = SvSTATE (prev_sv);
1005 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE (next_sv);
1580 TRANSFER_CHECK (*ta);
1006} 1581}
1007 1582
1008static void 1583static void
1009api_transfer (SV *prev_sv, SV *next_sv) 1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1010{ 1585{
1011 dTHX;
1012 struct transfer_args ta; 1586 struct coro_transfer_args ta;
1013 1587
1014 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1015 TRANSFER (ta); 1589 TRANSFER (ta, 1);
1590}
1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1613}
1614
1615/** Coro ********************************************************************/
1616
1617INLINE void
1618coro_enq (pTHX_ struct coro *coro)
1619{
1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1621
1622 SvREFCNT_inc_NN (coro->hv);
1623
1624 coro->next_ready = 0;
1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1626 ready [1] = coro;
1627}
1628
1629INLINE struct coro *
1630coro_deq (pTHX)
1631{
1632 int prio;
1633
1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1635 {
1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1645
1646 return 0;
1016} 1647}
1017 1648
1018static int 1649static int
1019api_save (SV *coro_sv, int new_save)
1020{
1021 dTHX;
1022 struct coro *coro = SvSTATE (coro_sv);
1023 int old_save = coro->save;
1024
1025 if (new_save >= 0)
1026 coro->save = new_save;
1027
1028 return old_save;
1029}
1030
1031/** Coro ********************************************************************/
1032
1033static void
1034coro_enq (pTHX_ SV *coro_sv)
1035{
1036 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1037}
1038
1039static SV *
1040coro_deq (pTHX_ int min_prio)
1041{
1042 int prio = PRIO_MAX - PRIO_MIN;
1043
1044 min_prio -= PRIO_MIN;
1045 if (min_prio < 0)
1046 min_prio = 0;
1047
1048 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1049 if (AvFILLp (coro_ready [prio]) >= 0)
1050 return av_shift (coro_ready [prio]);
1051
1052 return 0;
1053}
1054
1055static int
1056api_ready (SV *coro_sv) 1650api_ready (pTHX_ SV *coro_sv)
1057{ 1651{
1058 dTHX;
1059 struct coro *coro; 1652 struct coro *coro;
1060 1653 SV *sv_hook;
1061 if (SvROK (coro_sv)) 1654 void (*xs_hook)(void);
1062 coro_sv = SvRV (coro_sv);
1063 1655
1064 coro = SvSTATE (coro_sv); 1656 coro = SvSTATE (coro_sv);
1065 1657
1066 if (coro->flags & CF_READY) 1658 if (coro->flags & CF_READY)
1067 return 0; 1659 return 0;
1068 1660
1069 coro->flags |= CF_READY; 1661 coro->flags |= CF_READY;
1070 1662
1071 LOCK; 1663 sv_hook = coro_nready ? 0 : coro_readyhook;
1072 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1664 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1665
1666 coro_enq (aTHX_ coro);
1073 ++coro_nready; 1667 ++coro_nready;
1074 UNLOCK; 1668
1669 if (sv_hook)
1670 {
1671 dSP;
1672
1673 ENTER;
1674 SAVETMPS;
1675
1676 PUSHMARK (SP);
1677 PUTBACK;
1678 call_sv (sv_hook, G_VOID | G_DISCARD);
1679
1680 FREETMPS;
1681 LEAVE;
1682 }
1683
1684 if (xs_hook)
1685 xs_hook ();
1075 1686
1076 return 1; 1687 return 1;
1077} 1688}
1078 1689
1079static int 1690static int
1080api_is_ready (SV *coro_sv) 1691api_is_ready (pTHX_ SV *coro_sv)
1081{ 1692{
1082 dTHX;
1083 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1693 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1084} 1694}
1085 1695
1696/* expects to own a reference to next->hv */
1697INLINE void
1698prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1699{
1700 SV *prev_sv = SvRV (coro_current);
1701
1702 ta->prev = SvSTATE_hv (prev_sv);
1703 ta->next = next;
1704
1705 TRANSFER_CHECK (*ta);
1706
1707 SvRV_set (coro_current, (SV *)next->hv);
1708
1709 free_coro_mortal (aTHX);
1710 coro_mortal = prev_sv;
1711}
1712
1086static void 1713static void
1087prepare_schedule (pTHX_ struct transfer_args *ta) 1714prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1088{ 1715{
1089 SV *prev_sv, *next_sv;
1090
1091 for (;;) 1716 for (;;)
1092 { 1717 {
1093 LOCK; 1718 struct coro *next = coro_deq (aTHX);
1094 next_sv = coro_deq (aTHX_ PRIO_MIN);
1095 1719
1720 if (expect_true (next))
1721 {
1722 /* cannot transfer to destroyed coros, skip and look for next */
1723 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1724 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1725 else
1726 {
1727 next->flags &= ~CF_READY;
1728 --coro_nready;
1729
1730 prepare_schedule_to (aTHX_ ta, next);
1731 break;
1732 }
1733 }
1734 else
1735 {
1096 /* nothing to schedule: call the idle handler */ 1736 /* nothing to schedule: call the idle handler */
1097 if (!next_sv) 1737 if (SvROK (sv_idle)
1738 && SvOBJECT (SvRV (sv_idle)))
1739 {
1740 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1741 api_ready (aTHX_ SvRV (sv_idle));
1742 --coro_nready;
1743 }
1744 else
1745 {
1746 dSP;
1747
1748 ENTER;
1749 SAVETMPS;
1750
1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (sv_idle, G_VOID | G_DISCARD);
1754
1755 FREETMPS;
1756 LEAVE;
1757 }
1758 }
1759 }
1760}
1761
1762INLINE void
1763prepare_cede (pTHX_ struct coro_transfer_args *ta)
1764{
1765 api_ready (aTHX_ coro_current);
1766 prepare_schedule (aTHX_ ta);
1767}
1768
1769INLINE void
1770prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1771{
1772 SV *prev = SvRV (coro_current);
1773
1774 if (coro_nready)
1775 {
1776 prepare_schedule (aTHX_ ta);
1777 api_ready (aTHX_ prev);
1778 }
1779 else
1780 prepare_nop (aTHX_ ta);
1781}
1782
1783static void
1784api_schedule (pTHX)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_schedule (aTHX_ &ta);
1789 TRANSFER (ta, 1);
1790}
1791
1792static void
1793api_schedule_to (pTHX_ SV *coro_sv)
1794{
1795 struct coro_transfer_args ta;
1796 struct coro *next = SvSTATE (coro_sv);
1797
1798 SvREFCNT_inc_NN (coro_sv);
1799 prepare_schedule_to (aTHX_ &ta, next);
1800}
1801
1802static int
1803api_cede (pTHX)
1804{
1805 struct coro_transfer_args ta;
1806
1807 prepare_cede (aTHX_ &ta);
1808
1809 if (expect_true (ta.prev != ta.next))
1810 {
1811 TRANSFER (ta, 1);
1812 return 1;
1813 }
1814 else
1815 return 0;
1816}
1817
1818static int
1819api_cede_notself (pTHX)
1820{
1821 if (coro_nready)
1822 {
1823 struct coro_transfer_args ta;
1824
1825 prepare_cede_notself (aTHX_ &ta);
1826 TRANSFER (ta, 1);
1827 return 1;
1828 }
1829 else
1830 return 0;
1831}
1832
1833static void
1834api_trace (pTHX_ SV *coro_sv, int flags)
1835{
1836 struct coro *coro = SvSTATE (coro_sv);
1837
1838 if (coro->flags & CF_RUNNING)
1839 croak ("cannot enable tracing on a running coroutine, caught");
1840
1841 if (flags & CC_TRACE)
1842 {
1843 if (!coro->cctx)
1844 coro->cctx = cctx_new_run ();
1845 else if (!(coro->cctx->flags & CC_TRACE))
1846 croak ("cannot enable tracing on coroutine with custom stack, caught");
1847
1848 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1849 }
1850 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1851 {
1852 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1853
1854 if (coro->flags & CF_RUNNING)
1855 PL_runops = RUNOPS_DEFAULT;
1856 else
1857 coro->slot->runops = RUNOPS_DEFAULT;
1858 }
1859}
1860
1861static void
1862coro_call_on_destroy (pTHX_ struct coro *coro)
1863{
1864 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1865 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1866
1867 if (on_destroyp)
1868 {
1869 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1870
1871 while (AvFILLp (on_destroy) >= 0)
1872 {
1873 dSP; /* don't disturb outer sp */
1874 SV *cb = av_pop (on_destroy);
1875
1876 PUSHMARK (SP);
1877
1878 if (statusp)
1879 {
1880 int i;
1881 AV *status = (AV *)SvRV (*statusp);
1882 EXTEND (SP, AvFILLp (status) + 1);
1883
1884 for (i = 0; i <= AvFILLp (status); ++i)
1885 PUSHs (AvARRAY (status)[i]);
1886 }
1887
1888 PUTBACK;
1889 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1890 }
1891 }
1892}
1893
1894static void
1895slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 int i;
1898 HV *hv = (HV *)SvRV (coro_current);
1899 AV *av = newAV ();
1900
1901 av_extend (av, items - 1);
1902 for (i = 0; i < items; ++i)
1903 av_push (av, SvREFCNT_inc_NN (arg [i]));
1904
1905 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1906
1907 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1908 api_ready (aTHX_ sv_manager);
1909
1910 frame->prepare = prepare_schedule;
1911 frame->check = slf_check_repeat;
1912
1913 /* as a minor optimisation, we could unwind all stacks here */
1914 /* but that puts extra pressure on pp_slf, and is not worth much */
1915 /*coro_unwind_stacks (aTHX);*/
1916}
1917
1918/*****************************************************************************/
1919/* async pool handler */
1920
1921static int
1922slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = (struct coro *)frame->data;
1926
1927 if (!coro->invoke_cb)
1928 return 1; /* loop till we have invoke */
1929 else
1930 {
1931 hv_store (hv, "desc", sizeof ("desc") - 1,
1932 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1933
1934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1935
1936 {
1937 dSP;
1938 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1939 PUTBACK;
1940 }
1941
1942 SvREFCNT_dec (GvAV (PL_defgv));
1943 GvAV (PL_defgv) = coro->invoke_av;
1944 coro->invoke_av = 0;
1945
1946 return 0;
1947 }
1948}
1949
1950static void
1951slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1952{
1953 HV *hv = (HV *)SvRV (coro_current);
1954 struct coro *coro = SvSTATE_hv ((SV *)hv);
1955
1956 if (expect_true (coro->saved_deffh))
1957 {
1958 /* subsequent iteration */
1959 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1960 coro->saved_deffh = 0;
1961
1962 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1963 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1964 {
1965 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1966 coro->invoke_av = newAV ();
1967
1968 frame->prepare = prepare_nop;
1969 }
1970 else
1971 {
1972 av_clear (GvAV (PL_defgv));
1973 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1974
1975 coro->prio = 0;
1976
1977 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1978 api_trace (aTHX_ coro_current, 0);
1979
1980 frame->prepare = prepare_schedule;
1981 av_push (av_async_pool, SvREFCNT_inc (hv));
1982 }
1983 }
1984 else
1985 {
1986 /* first iteration, simply fall through */
1987 frame->prepare = prepare_nop;
1988 }
1989
1990 frame->check = slf_check_pool_handler;
1991 frame->data = (void *)coro;
1992}
1993
1994/*****************************************************************************/
1995/* rouse callback */
1996
1997#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1998
1999static void
2000coro_rouse_callback (pTHX_ CV *cv)
2001{
2002 dXSARGS;
2003 SV *data = (SV *)GENSUB_ARG;
2004
2005 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2006 {
2007 /* first call, set args */
2008 SV *coro = SvRV (data);
2009 AV *av = newAV ();
2010
2011 SvRV_set (data, (SV *)av);
2012
2013 /* better take a full copy of the arguments */
2014 while (items--)
2015 av_store (av, items, newSVsv (ST (items)));
2016
2017 api_ready (aTHX_ coro);
2018 SvREFCNT_dec (coro);
2019 }
2020
2021 XSRETURN_EMPTY;
2022}
2023
2024static int
2025slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2026{
2027 SV *data = (SV *)frame->data;
2028
2029 if (CORO_THROW)
2030 return 0;
2031
2032 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2033 return 1;
2034
2035 /* now push all results on the stack */
2036 {
2037 dSP;
2038 AV *av = (AV *)SvRV (data);
2039 int i;
2040
2041 EXTEND (SP, AvFILLp (av) + 1);
2042 for (i = 0; i <= AvFILLp (av); ++i)
2043 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2044
2045 /* we have stolen the elements, so set length to zero and free */
2046 AvFILLp (av) = -1;
2047 av_undef (av);
2048
2049 PUTBACK;
2050 }
2051
2052 return 0;
2053}
2054
2055static void
2056slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2057{
2058 SV *cb;
2059
2060 if (items)
2061 cb = arg [0];
2062 else
2063 {
2064 struct coro *coro = SvSTATE_current;
2065
2066 if (!coro->rouse_cb)
2067 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2068
2069 cb = sv_2mortal (coro->rouse_cb);
2070 coro->rouse_cb = 0;
2071 }
2072
2073 if (!SvROK (cb)
2074 || SvTYPE (SvRV (cb)) != SVt_PVCV
2075 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2076 croak ("Coro::rouse_wait called with illegal callback argument,");
2077
2078 {
2079 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2080 SV *data = (SV *)GENSUB_ARG;
2081
2082 frame->data = (void *)data;
2083 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2084 frame->check = slf_check_rouse_wait;
2085 }
2086}
2087
2088static SV *
2089coro_new_rouse_cb (pTHX)
2090{
2091 HV *hv = (HV *)SvRV (coro_current);
2092 struct coro *coro = SvSTATE_hv (hv);
2093 SV *data = newRV_inc ((SV *)hv);
2094 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2095
2096 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2097 SvREFCNT_dec (data); /* magicext increases the refcount */
2098
2099 SvREFCNT_dec (coro->rouse_cb);
2100 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2101
2102 return cb;
2103}
2104
2105/*****************************************************************************/
2106/* schedule-like-function opcode (SLF) */
2107
2108static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2109static const CV *slf_cv;
2110static SV **slf_argv;
2111static int slf_argc, slf_arga; /* count, allocated */
2112static I32 slf_ax; /* top of stack, for restore */
2113
2114/* this restores the stack in the case we patched the entersub, to */
2115/* recreate the stack frame as perl will on following calls */
2116/* since entersub cleared the stack */
2117static OP *
2118pp_restore (pTHX)
2119{
2120 int i;
2121 SV **SP = PL_stack_base + slf_ax;
2122
2123 PUSHMARK (SP);
2124
2125 EXTEND (SP, slf_argc + 1);
2126
2127 for (i = 0; i < slf_argc; ++i)
2128 PUSHs (sv_2mortal (slf_argv [i]));
2129
2130 PUSHs ((SV *)CvGV (slf_cv));
2131
2132 RETURNOP (slf_restore.op_first);
2133}
2134
2135static void
2136slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2137{
2138 SV **arg = (SV **)slf_frame.data;
2139
2140 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2141}
2142
2143static void
2144slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2145{
2146 if (items != 2)
2147 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2148
2149 frame->prepare = slf_prepare_transfer;
2150 frame->check = slf_check_nop;
2151 frame->data = (void *)arg; /* let's hope it will stay valid */
2152}
2153
2154static void
2155slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_nop;
2159}
2160
2161static void
2162slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2163{
2164 struct coro *next = (struct coro *)slf_frame.data;
2165
2166 SvREFCNT_inc_NN (next->hv);
2167 prepare_schedule_to (aTHX_ ta, next);
2168}
2169
2170static void
2171slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2172{
2173 if (!items)
2174 croak ("Coro::schedule_to expects a coroutine argument, caught");
2175
2176 frame->data = (void *)SvSTATE (arg [0]);
2177 frame->prepare = slf_prepare_schedule_to;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2183{
2184 api_ready (aTHX_ SvRV (coro_current));
2185
2186 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2187}
2188
2189static void
2190slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 frame->prepare = prepare_cede;
2193 frame->check = slf_check_nop;
2194}
2195
2196static void
2197slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede_notself;
2200 frame->check = slf_check_nop;
2201}
2202
2203/*
2204 * these not obviously related functions are all rolled into one
2205 * function to increase chances that they all will call transfer with the same
2206 * stack offset
2207 * SLF stands for "schedule-like-function".
2208 */
2209static OP *
2210pp_slf (pTHX)
2211{
2212 I32 checkmark; /* mark SP to see how many elements check has pushed */
2213
2214 /* set up the slf frame, unless it has already been set-up */
2215 /* the latter happens when a new coro has been started */
2216 /* or when a new cctx was attached to an existing coroutine */
2217 if (expect_true (!slf_frame.prepare))
2218 {
2219 /* first iteration */
2220 dSP;
2221 SV **arg = PL_stack_base + TOPMARK + 1;
2222 int items = SP - arg; /* args without function object */
2223 SV *gv = *sp;
2224
2225 /* do a quick consistency check on the "function" object, and if it isn't */
2226 /* for us, divert to the real entersub */
2227 if (SvTYPE (gv) != SVt_PVGV
2228 || !GvCV (gv)
2229 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2230 return PL_ppaddr[OP_ENTERSUB](aTHX);
2231
2232 if (!(PL_op->op_flags & OPf_STACKED))
2233 {
2234 /* ampersand-form of call, use @_ instead of stack */
2235 AV *av = GvAV (PL_defgv);
2236 arg = AvARRAY (av);
2237 items = AvFILLp (av) + 1;
2238 }
2239
2240 /* now call the init function, which needs to set up slf_frame */
2241 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2242 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2243
2244 /* pop args */
2245 SP = PL_stack_base + POPMARK;
2246
2247 PUTBACK;
2248 }
2249
2250 /* now that we have a slf_frame, interpret it! */
2251 /* we use a callback system not to make the code needlessly */
2252 /* complicated, but so we can run multiple perl coros from one cctx */
2253
2254 do
2255 {
2256 struct coro_transfer_args ta;
2257
2258 slf_frame.prepare (aTHX_ &ta);
2259 TRANSFER (ta, 0);
2260
2261 checkmark = PL_stack_sp - PL_stack_base;
2262 }
2263 while (slf_frame.check (aTHX_ &slf_frame));
2264
2265 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2266
2267 /* exception handling */
2268 if (expect_false (CORO_THROW))
2269 {
2270 SV *exception = sv_2mortal (CORO_THROW);
2271
2272 CORO_THROW = 0;
2273 sv_setsv (ERRSV, exception);
2274 croak (0);
2275 }
2276
2277 /* return value handling - mostly like entersub */
2278 /* make sure we put something on the stack in scalar context */
2279 if (GIMME_V == G_SCALAR)
2280 {
2281 dSP;
2282 SV **bot = PL_stack_base + checkmark;
2283
2284 if (sp == bot) /* too few, push undef */
2285 bot [1] = &PL_sv_undef;
2286 else if (sp != bot + 1) /* too many, take last one */
2287 bot [1] = *sp;
2288
2289 SP = bot + 1;
2290
2291 PUTBACK;
2292 }
2293
2294 return NORMAL;
2295}
2296
2297static void
2298api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2299{
2300 int i;
2301 SV **arg = PL_stack_base + ax;
2302 int items = PL_stack_sp - arg + 1;
2303
2304 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2305
2306 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2307 && PL_op->op_ppaddr != pp_slf)
2308 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2309
2310 CvFLAGS (cv) |= CVf_SLF;
2311 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2312 slf_cv = cv;
2313
2314 /* we patch the op, and then re-run the whole call */
2315 /* we have to put the same argument on the stack for this to work */
2316 /* and this will be done by pp_restore */
2317 slf_restore.op_next = (OP *)&slf_restore;
2318 slf_restore.op_type = OP_CUSTOM;
2319 slf_restore.op_ppaddr = pp_restore;
2320 slf_restore.op_first = PL_op;
2321
2322 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2323
2324 if (PL_op->op_flags & OPf_STACKED)
2325 {
2326 if (items > slf_arga)
2327 {
2328 slf_arga = items;
2329 free (slf_argv);
2330 slf_argv = malloc (slf_arga * sizeof (SV *));
2331 }
2332
2333 slf_argc = items;
2334
2335 for (i = 0; i < items; ++i)
2336 slf_argv [i] = SvREFCNT_inc (arg [i]);
2337 }
2338 else
2339 slf_argc = 0;
2340
2341 PL_op->op_ppaddr = pp_slf;
2342 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2343
2344 PL_op = (OP *)&slf_restore;
2345}
2346
2347/*****************************************************************************/
2348/* dynamic wind */
2349
2350static void
2351on_enterleave_call (pTHX_ SV *cb)
2352{
2353 dSP;
2354
2355 PUSHSTACK;
2356
2357 PUSHMARK (SP);
2358 PUTBACK;
2359 call_sv (cb, G_VOID | G_DISCARD);
2360 SPAGAIN;
2361
2362 POPSTACK;
2363}
2364
2365static SV *
2366coro_avp_pop_and_free (pTHX_ AV **avp)
2367{
2368 AV *av = *avp;
2369 SV *res = av_pop (av);
2370
2371 if (AvFILLp (av) < 0)
2372 {
2373 *avp = 0;
2374 SvREFCNT_dec (av);
2375 }
2376
2377 return res;
2378}
2379
2380static void
2381coro_pop_on_enter (pTHX_ void *coro)
2382{
2383 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2384 SvREFCNT_dec (cb);
2385}
2386
2387static void
2388coro_pop_on_leave (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2391 on_enterleave_call (aTHX_ sv_2mortal (cb));
2392}
2393
2394/*****************************************************************************/
2395/* PerlIO::cede */
2396
2397typedef struct
2398{
2399 PerlIOBuf base;
2400 NV next, every;
2401} PerlIOCede;
2402
2403static IV
2404PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2405{
2406 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2407
2408 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2409 self->next = nvtime () + self->every;
2410
2411 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2412}
2413
2414static SV *
2415PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2416{
2417 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2418
2419 return newSVnv (self->every);
2420}
2421
2422static IV
2423PerlIOCede_flush (pTHX_ PerlIO *f)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426 double now = nvtime ();
2427
2428 if (now >= self->next)
2429 {
2430 api_cede (aTHX);
2431 self->next = now + self->every;
2432 }
2433
2434 return PerlIOBuf_flush (aTHX_ f);
2435}
2436
2437static PerlIO_funcs PerlIO_cede =
2438{
2439 sizeof(PerlIO_funcs),
2440 "cede",
2441 sizeof(PerlIOCede),
2442 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2443 PerlIOCede_pushed,
2444 PerlIOBuf_popped,
2445 PerlIOBuf_open,
2446 PerlIOBase_binmode,
2447 PerlIOCede_getarg,
2448 PerlIOBase_fileno,
2449 PerlIOBuf_dup,
2450 PerlIOBuf_read,
2451 PerlIOBuf_unread,
2452 PerlIOBuf_write,
2453 PerlIOBuf_seek,
2454 PerlIOBuf_tell,
2455 PerlIOBuf_close,
2456 PerlIOCede_flush,
2457 PerlIOBuf_fill,
2458 PerlIOBase_eof,
2459 PerlIOBase_error,
2460 PerlIOBase_clearerr,
2461 PerlIOBase_setlinebuf,
2462 PerlIOBuf_get_base,
2463 PerlIOBuf_bufsiz,
2464 PerlIOBuf_get_ptr,
2465 PerlIOBuf_get_cnt,
2466 PerlIOBuf_set_ptrcnt,
2467};
2468
2469/*****************************************************************************/
2470/* Coro::Semaphore & Coro::Signal */
2471
2472static SV *
2473coro_waitarray_new (pTHX_ int count)
2474{
2475 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2476 AV *av = newAV ();
2477 SV **ary;
2478
2479 /* unfortunately, building manually saves memory */
2480 Newx (ary, 2, SV *);
2481 AvALLOC (av) = ary;
2482#if PERL_VERSION_ATLEAST (5,10,0)
2483 AvARRAY (av) = ary;
2484#else
2485 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2486 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2487 SvPVX ((SV *)av) = (char *)ary;
2488#endif
2489 AvMAX (av) = 1;
2490 AvFILLp (av) = 0;
2491 ary [0] = newSViv (count);
2492
2493 return newRV_noinc ((SV *)av);
2494}
2495
2496/* semaphore */
2497
2498static void
2499coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2500{
2501 SV *count_sv = AvARRAY (av)[0];
2502 IV count = SvIVX (count_sv);
2503
2504 count += adjust;
2505 SvIVX (count_sv) = count;
2506
2507 /* now wake up as many waiters as are expected to lock */
2508 while (count > 0 && AvFILLp (av) > 0)
2509 {
2510 SV *cb;
2511
2512 /* swap first two elements so we can shift a waiter */
2513 AvARRAY (av)[0] = AvARRAY (av)[1];
2514 AvARRAY (av)[1] = count_sv;
2515 cb = av_shift (av);
2516
2517 if (SvOBJECT (cb))
2518 {
2519 api_ready (aTHX_ cb);
2520 --count;
2521 }
2522 else if (SvTYPE (cb) == SVt_PVCV)
1098 { 2523 {
1099 dSP; 2524 dSP;
1100 UNLOCK;
1101
1102 ENTER;
1103 SAVETMPS;
1104
1105 PUSHMARK (SP); 2525 PUSHMARK (SP);
2526 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1106 PUTBACK; 2527 PUTBACK;
1107 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2528 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1108
1109 FREETMPS;
1110 LEAVE;
1111 continue;
1112 } 2529 }
1113 2530
1114 ta->next = SvSTATE (next_sv); 2531 SvREFCNT_dec (cb);
2532 }
2533}
1115 2534
1116 /* cannot transfer to destroyed coros, skip and look for next */ 2535static void
1117 if (ta->next->flags & CF_DESTROYED) 2536coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2537{
2538 /* call $sem->adjust (0) to possibly wake up some other waiters */
2539 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2540}
2541
2542static int
2543slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2544{
2545 AV *av = (AV *)frame->data;
2546 SV *count_sv = AvARRAY (av)[0];
2547
2548 /* if we are about to throw, don't actually acquire the lock, just throw */
2549 if (CORO_THROW)
2550 return 0;
2551 else if (SvIVX (count_sv) > 0)
2552 {
2553 SvSTATE_current->on_destroy = 0;
2554
2555 if (acquire)
2556 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2557 else
2558 coro_semaphore_adjust (aTHX_ av, 0);
2559
2560 return 0;
2561 }
2562 else
2563 {
2564 int i;
2565 /* if we were woken up but can't down, we look through the whole */
2566 /* waiters list and only add us if we aren't in there already */
2567 /* this avoids some degenerate memory usage cases */
2568
2569 for (i = 1; i <= AvFILLp (av); ++i)
2570 if (AvARRAY (av)[i] == SvRV (coro_current))
2571 return 1;
2572
2573 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2574 return 1;
2575 }
2576}
2577
2578static int
2579slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2580{
2581 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2582}
2583
2584static int
2585slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2588}
2589
2590static void
2591slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 AV *av = (AV *)SvRV (arg [0]);
2594
2595 if (SvIVX (AvARRAY (av)[0]) > 0)
2596 {
2597 frame->data = (void *)av;
2598 frame->prepare = prepare_nop;
2599 }
2600 else
2601 {
2602 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2603
2604 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2605 frame->prepare = prepare_schedule;
2606
2607 /* to avoid race conditions when a woken-up coro gets terminated */
2608 /* we arrange for a temporary on_destroy that calls adjust (0) */
2609 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2610 }
2611}
2612
2613static void
2614slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2617 frame->check = slf_check_semaphore_down;
2618}
2619
2620static void
2621slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 if (items >= 2)
2624 {
2625 /* callback form */
2626 AV *av = (AV *)SvRV (arg [0]);
2627 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2628
2629 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2630
2631 if (SvIVX (AvARRAY (av)[0]) > 0)
2632 coro_semaphore_adjust (aTHX_ av, 0);
2633
2634 frame->prepare = prepare_nop;
2635 frame->check = slf_check_nop;
2636 }
2637 else
2638 {
2639 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2640 frame->check = slf_check_semaphore_wait;
2641 }
2642}
2643
2644/* signal */
2645
2646static void
2647coro_signal_wake (pTHX_ AV *av, int count)
2648{
2649 SvIVX (AvARRAY (av)[0]) = 0;
2650
2651 /* now signal count waiters */
2652 while (count > 0 && AvFILLp (av) > 0)
2653 {
2654 SV *cb;
2655
2656 /* swap first two elements so we can shift a waiter */
2657 cb = AvARRAY (av)[0];
2658 AvARRAY (av)[0] = AvARRAY (av)[1];
2659 AvARRAY (av)[1] = cb;
2660
2661 cb = av_shift (av);
2662
2663 api_ready (aTHX_ cb);
2664 sv_setiv (cb, 0); /* signal waiter */
2665 SvREFCNT_dec (cb);
2666
2667 --count;
2668 }
2669}
2670
2671static int
2672slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2673{
2674 /* if we are about to throw, also stop waiting */
2675 return SvROK ((SV *)frame->data) && !CORO_THROW;
2676}
2677
2678static void
2679slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2680{
2681 AV *av = (AV *)SvRV (arg [0]);
2682
2683 if (SvIVX (AvARRAY (av)[0]))
2684 {
2685 SvIVX (AvARRAY (av)[0]) = 0;
2686 frame->prepare = prepare_nop;
2687 frame->check = slf_check_nop;
2688 }
2689 else
2690 {
2691 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2692
2693 av_push (av, waiter);
2694
2695 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2696 frame->prepare = prepare_schedule;
2697 frame->check = slf_check_signal_wait;
2698 }
2699}
2700
2701/*****************************************************************************/
2702/* Coro::AIO */
2703
2704#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2705
2706/* helper storage struct */
2707struct io_state
2708{
2709 int errorno;
2710 I32 laststype; /* U16 in 5.10.0 */
2711 int laststatval;
2712 Stat_t statcache;
2713};
2714
2715static void
2716coro_aio_callback (pTHX_ CV *cv)
2717{
2718 dXSARGS;
2719 AV *state = (AV *)GENSUB_ARG;
2720 SV *coro = av_pop (state);
2721 SV *data_sv = newSV (sizeof (struct io_state));
2722
2723 av_extend (state, items - 1);
2724
2725 sv_upgrade (data_sv, SVt_PV);
2726 SvCUR_set (data_sv, sizeof (struct io_state));
2727 SvPOK_only (data_sv);
2728
2729 {
2730 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2731
2732 data->errorno = errno;
2733 data->laststype = PL_laststype;
2734 data->laststatval = PL_laststatval;
2735 data->statcache = PL_statcache;
2736 }
2737
2738 /* now build the result vector out of all the parameters and the data_sv */
2739 {
2740 int i;
2741
2742 for (i = 0; i < items; ++i)
2743 av_push (state, SvREFCNT_inc_NN (ST (i)));
2744 }
2745
2746 av_push (state, data_sv);
2747
2748 api_ready (aTHX_ coro);
2749 SvREFCNT_dec (coro);
2750 SvREFCNT_dec ((AV *)state);
2751}
2752
2753static int
2754slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2755{
2756 AV *state = (AV *)frame->data;
2757
2758 /* if we are about to throw, return early */
2759 /* this does not cancel the aio request, but at least */
2760 /* it quickly returns */
2761 if (CORO_THROW)
2762 return 0;
2763
2764 /* one element that is an RV? repeat! */
2765 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2766 return 1;
2767
2768 /* restore status */
2769 {
2770 SV *data_sv = av_pop (state);
2771 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2772
2773 errno = data->errorno;
2774 PL_laststype = data->laststype;
2775 PL_laststatval = data->laststatval;
2776 PL_statcache = data->statcache;
2777
2778 SvREFCNT_dec (data_sv);
2779 }
2780
2781 /* push result values */
2782 {
2783 dSP;
2784 int i;
2785
2786 EXTEND (SP, AvFILLp (state) + 1);
2787 for (i = 0; i <= AvFILLp (state); ++i)
2788 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2789
2790 PUTBACK;
2791 }
2792
2793 return 0;
2794}
2795
2796static void
2797slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2798{
2799 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2800 SV *coro_hv = SvRV (coro_current);
2801 struct coro *coro = SvSTATE_hv (coro_hv);
2802
2803 /* put our coroutine id on the state arg */
2804 av_push (state, SvREFCNT_inc_NN (coro_hv));
2805
2806 /* first see whether we have a non-zero priority and set it as AIO prio */
2807 if (coro->prio)
2808 {
2809 dSP;
2810
2811 static SV *prio_cv;
2812 static SV *prio_sv;
2813
2814 if (expect_false (!prio_cv))
1118 { 2815 {
1119 UNLOCK; 2816 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1120 SvREFCNT_dec (next_sv); 2817 prio_sv = newSViv (0);
1121 /* coro_nready is already taken care of by destroy */
1122 continue;
1123 } 2818 }
1124 2819
1125 --coro_nready; 2820 PUSHMARK (SP);
1126 UNLOCK; 2821 sv_setiv (prio_sv, coro->prio);
1127 break; 2822 XPUSHs (prio_sv);
1128 }
1129 2823
1130 /* free this only after the transfer */ 2824 PUTBACK;
1131 prev_sv = SvRV (coro_current); 2825 call_sv (prio_cv, G_VOID | G_DISCARD);
1132 SvRV_set (coro_current, next_sv);
1133 ta->prev = SvSTATE (prev_sv);
1134
1135 assert (ta->next->flags & CF_READY);
1136 ta->next->flags &= ~CF_READY;
1137
1138 LOCK;
1139 free_coro_mortal (aTHX);
1140 coro_mortal = prev_sv;
1141 UNLOCK;
1142}
1143
1144static void
1145prepare_cede (pTHX_ struct transfer_args *ta)
1146{
1147 api_ready (coro_current);
1148 prepare_schedule (aTHX_ ta);
1149}
1150
1151static int
1152prepare_cede_notself (pTHX_ struct transfer_args *ta)
1153{
1154 if (coro_nready)
1155 { 2826 }
1156 SV *prev = SvRV (coro_current); 2827
1157 prepare_schedule (aTHX_ ta); 2828 /* now call the original request */
1158 api_ready (prev); 2829 {
1159 return 1; 2830 dSP;
2831 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2832 int i;
2833
2834 PUSHMARK (SP);
2835
2836 /* first push all args to the stack */
2837 EXTEND (SP, items + 1);
2838
2839 for (i = 0; i < items; ++i)
2840 PUSHs (arg [i]);
2841
2842 /* now push the callback closure */
2843 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2844
2845 /* now call the AIO function - we assume our request is uncancelable */
2846 PUTBACK;
2847 call_sv ((SV *)req, G_VOID | G_DISCARD);
1160 } 2848 }
1161 else
1162 return 0;
1163}
1164 2849
1165static void 2850 /* now that the requets is going, we loop toll we have a result */
1166api_schedule (void) 2851 frame->data = (void *)state;
1167{ 2852 frame->prepare = prepare_schedule;
1168 dTHX; 2853 frame->check = slf_check_aio_req;
1169 struct transfer_args ta;
1170
1171 prepare_schedule (aTHX_ &ta);
1172 TRANSFER (ta);
1173} 2854}
1174 2855
1175static int 2856static void
1176api_cede (void) 2857coro_aio_req_xs (pTHX_ CV *cv)
1177{ 2858{
1178 dTHX; 2859 dXSARGS;
1179 struct transfer_args ta;
1180 2860
1181 prepare_cede (aTHX_ &ta); 2861 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1182 2862
1183 if (ta.prev != ta.next) 2863 XSRETURN_EMPTY;
1184 {
1185 TRANSFER (ta);
1186 return 1;
1187 }
1188 else
1189 return 0;
1190} 2864}
1191 2865
1192static int 2866/*****************************************************************************/
1193api_cede_notself (void)
1194{
1195 dTHX;
1196 struct transfer_args ta;
1197 2867
1198 if (prepare_cede_notself (aTHX_ &ta)) 2868#if CORO_CLONE
1199 { 2869# include "clone.c"
1200 TRANSFER (ta); 2870#endif
1201 return 1;
1202 }
1203 else
1204 return 0;
1205}
1206 2871
1207MODULE = Coro::State PACKAGE = Coro::State 2872MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1208 2873
1209PROTOTYPES: DISABLE 2874PROTOTYPES: DISABLE
1210 2875
1211BOOT: 2876BOOT:
1212{ 2877{
1213#ifdef USE_ITHREADS 2878#ifdef USE_ITHREADS
1214 MUTEX_INIT (&coro_mutex); 2879# if CORO_PTHREAD
2880 coro_thx = PERL_GET_CONTEXT;
2881# endif
1215#endif 2882#endif
1216 BOOT_PAGESIZE; 2883 BOOT_PAGESIZE;
1217 2884
2885 cctx_current = cctx_new_empty ();
2886
2887 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2888 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2889
2890 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2891 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2892 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2893
2894 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2895 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2896 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2897
1218 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2898 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1219 2899
1220 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2900 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1221 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2901 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1222 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1223 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1224 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2902 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1226 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2903 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1227 2904
1228 main_mainstack = PL_mainstack; 2905 main_mainstack = PL_mainstack;
1229 main_top_env = PL_top_env; 2906 main_top_env = PL_top_env;
1230 2907
1231 while (main_top_env->je_prev) 2908 while (main_top_env->je_prev)
1232 main_top_env = main_top_env->je_prev; 2909 main_top_env = main_top_env->je_prev;
1233 2910
2911 {
2912 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2913
2914 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2915 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2916
2917 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2918 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2919 }
2920
1234 coroapi.ver = CORO_API_VERSION; 2921 coroapi.ver = CORO_API_VERSION;
2922 coroapi.rev = CORO_API_REVISION;
2923
1235 coroapi.transfer = api_transfer; 2924 coroapi.transfer = api_transfer;
2925
2926 coroapi.sv_state = SvSTATE_;
2927 coroapi.execute_slf = api_execute_slf;
2928 coroapi.prepare_nop = prepare_nop;
2929 coroapi.prepare_schedule = prepare_schedule;
2930 coroapi.prepare_cede = prepare_cede;
2931 coroapi.prepare_cede_notself = prepare_cede_notself;
2932
2933 {
2934 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2935
2936 if (!svp) croak ("Time::HiRes is required");
2937 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2938
2939 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2940 }
1236 2941
1237 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2942 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1238} 2943}
1239 2944
1240SV * 2945SV *
1241new (char *klass, ...) 2946new (char *klass, ...)
2947 ALIAS:
2948 Coro::new = 1
1242 CODE: 2949 CODE:
1243{ 2950{
1244 struct coro *coro; 2951 struct coro *coro;
2952 MAGIC *mg;
1245 HV *hv; 2953 HV *hv;
2954 CV *cb;
1246 int i; 2955 int i;
1247 2956
2957 if (items > 1)
2958 {
2959 cb = coro_sv_2cv (aTHX_ ST (1));
2960
2961 if (!ix)
2962 {
2963 if (CvISXSUB (cb))
2964 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2965
2966 if (!CvROOT (cb))
2967 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2968 }
2969 }
2970
1248 Newz (0, coro, 1, struct coro); 2971 Newz (0, coro, 1, struct coro);
1249 coro->args = newAV (); 2972 coro->args = newAV ();
1250 coro->save = CORO_SAVE_DEF;
1251 coro->flags = CF_NEW; 2973 coro->flags = CF_NEW;
1252 2974
1253 if (coro_first) coro_first->prev = coro; 2975 if (coro_first) coro_first->prev = coro;
1254 coro->next = coro_first; 2976 coro->next = coro_first;
1255 coro_first = coro; 2977 coro_first = coro;
1256 2978
1257 coro->hv = hv = newHV (); 2979 coro->hv = hv = newHV ();
1258 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2980 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2981 mg->mg_flags |= MGf_DUP;
1259 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2982 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1260 2983
2984 if (items > 1)
2985 {
2986 av_extend (coro->args, items - 1 + ix - 1);
2987
2988 if (ix)
2989 {
2990 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2991 cb = cv_coro_run;
2992 }
2993
2994 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2995
1261 for (i = 1; i < items; i++) 2996 for (i = 2; i < items; i++)
1262 av_push (coro->args, newSVsv (ST (i))); 2997 av_push (coro->args, newSVsv (ST (i)));
2998 }
1263} 2999}
1264 OUTPUT: 3000 OUTPUT:
1265 RETVAL 3001 RETVAL
1266 3002
1267int 3003void
1268save (SV *coro, int new_save = -1) 3004transfer (...)
3005 PROTOTYPE: $$
1269 CODE: 3006 CODE:
1270 RETVAL = api_save (coro, new_save); 3007 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1271 OUTPUT:
1272 RETVAL
1273
1274int
1275save_also (SV *coro_sv, int save_also)
1276 CODE:
1277{
1278 struct coro *coro = SvSTATE (coro_sv);
1279 RETVAL = coro->save;
1280 coro->save |= save_also;
1281}
1282 OUTPUT:
1283 RETVAL
1284
1285void
1286_set_stacklevel (...)
1287 ALIAS:
1288 Coro::State::transfer = 1
1289 Coro::schedule = 2
1290 Coro::cede = 3
1291 Coro::cede_notself = 4
1292 CODE:
1293{
1294 struct transfer_args ta;
1295
1296 switch (ix)
1297 {
1298 case 0:
1299 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1300 ta.next = 0;
1301 break;
1302
1303 case 1:
1304 if (items != 2)
1305 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1306
1307 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1308 break;
1309
1310 case 2:
1311 prepare_schedule (aTHX_ &ta);
1312 break;
1313
1314 case 3:
1315 prepare_cede (aTHX_ &ta);
1316 break;
1317
1318 case 4:
1319 if (!prepare_cede_notself (aTHX_ &ta))
1320 XSRETURN_EMPTY;
1321
1322 break;
1323 }
1324
1325 BARRIER;
1326 TRANSFER (ta);
1327
1328 if (GIMME_V != G_VOID && ta.next != ta.prev)
1329 XSRETURN_YES;
1330}
1331 3008
1332bool 3009bool
1333_destroy (SV *coro_sv) 3010_destroy (SV *coro_sv)
1334 CODE: 3011 CODE:
1335 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3012 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1336 OUTPUT: 3013 OUTPUT:
1337 RETVAL 3014 RETVAL
1338 3015
1339void 3016void
1340_exit (code) 3017_exit (int code)
1341 int code
1342 PROTOTYPE: $ 3018 PROTOTYPE: $
1343 CODE: 3019 CODE:
1344 _exit (code); 3020 _exit (code);
1345 3021
3022SV *
3023clone (Coro::State coro)
3024 CODE:
3025{
3026#if CORO_CLONE
3027 struct coro *ncoro = coro_clone (aTHX_ coro);
3028 MAGIC *mg;
3029 /* TODO: too much duplication */
3030 ncoro->hv = newHV ();
3031 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3034#else
3035 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3036#endif
3037}
3038 OUTPUT:
3039 RETVAL
3040
1346int 3041int
1347cctx_stacksize (int new_stacksize = 0) 3042cctx_stacksize (int new_stacksize = 0)
3043 PROTOTYPE: ;$
1348 CODE: 3044 CODE:
1349 RETVAL = coro_stacksize; 3045 RETVAL = cctx_stacksize;
1350 if (new_stacksize) 3046 if (new_stacksize)
3047 {
1351 coro_stacksize = new_stacksize; 3048 cctx_stacksize = new_stacksize;
3049 ++cctx_gen;
3050 }
1352 OUTPUT: 3051 OUTPUT:
1353 RETVAL 3052 RETVAL
1354 3053
1355int 3054int
3055cctx_max_idle (int max_idle = 0)
3056 PROTOTYPE: ;$
3057 CODE:
3058 RETVAL = cctx_max_idle;
3059 if (max_idle > 1)
3060 cctx_max_idle = max_idle;
3061 OUTPUT:
3062 RETVAL
3063
3064int
1356cctx_count () 3065cctx_count ()
3066 PROTOTYPE:
1357 CODE: 3067 CODE:
1358 RETVAL = cctx_count; 3068 RETVAL = cctx_count;
1359 OUTPUT: 3069 OUTPUT:
1360 RETVAL 3070 RETVAL
1361 3071
1362int 3072int
1363cctx_idle () 3073cctx_idle ()
3074 PROTOTYPE:
1364 CODE: 3075 CODE:
1365 RETVAL = cctx_idle; 3076 RETVAL = cctx_idle;
1366 OUTPUT: 3077 OUTPUT:
1367 RETVAL 3078 RETVAL
1368 3079
1369void 3080void
1370list () 3081list ()
3082 PROTOTYPE:
1371 PPCODE: 3083 PPCODE:
1372{ 3084{
1373 struct coro *coro; 3085 struct coro *coro;
1374 for (coro = coro_first; coro; coro = coro->next) 3086 for (coro = coro_first; coro; coro = coro->next)
1375 if (coro->hv) 3087 if (coro->hv)
1376 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3088 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1377} 3089}
1378 3090
1379void 3091void
1380_eval (Coro::State coro, SV *coderef) 3092call (Coro::State coro, SV *coderef)
3093 ALIAS:
3094 eval = 1
1381 CODE: 3095 CODE:
1382{ 3096{
1383 if (coro->mainstack) 3097 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1384 { 3098 {
1385 struct coro temp; 3099 struct coro *current = SvSTATE_current;
1386 Zero (&temp, 1, struct coro);
1387 temp.save = CORO_SAVE_ALL;
1388 3100
1389 if (!(coro->flags & CF_RUNNING)) 3101 if (current != coro)
1390 { 3102 {
3103 PUTBACK;
1391 save_perl (aTHX_ &temp); 3104 save_perl (aTHX_ current);
1392 load_perl (aTHX_ coro); 3105 load_perl (aTHX_ coro);
3106 SPAGAIN;
1393 } 3107 }
1394 3108
1395 { 3109 PUSHSTACK;
1396 dSP; 3110
1397 ENTER;
1398 SAVETMPS;
1399 PUSHMARK (SP); 3111 PUSHMARK (SP);
1400 PUTBACK; 3112 PUTBACK;
3113
3114 if (ix)
3115 eval_sv (coderef, 0);
3116 else
1401 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3117 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3118
3119 POPSTACK;
1402 SPAGAIN; 3120 SPAGAIN;
1403 FREETMPS;
1404 LEAVE;
1405 PUTBACK;
1406 }
1407 3121
1408 if (!(coro->flags & CF_RUNNING)) 3122 if (current != coro)
1409 { 3123 {
3124 PUTBACK;
1410 save_perl (aTHX_ coro); 3125 save_perl (aTHX_ coro);
1411 load_perl (aTHX_ &temp); 3126 load_perl (aTHX_ current);
3127 SPAGAIN;
1412 } 3128 }
1413 } 3129 }
1414} 3130}
1415 3131
1416SV * 3132SV *
1417is_ready (Coro::State coro) 3133is_ready (Coro::State coro)
1418 PROTOTYPE: $ 3134 PROTOTYPE: $
1419 ALIAS: 3135 ALIAS:
1420 is_ready = CF_READY 3136 is_ready = CF_READY
1421 is_running = CF_RUNNING 3137 is_running = CF_RUNNING
1422 is_new = CF_NEW 3138 is_new = CF_NEW
1423 is_destroyed = CF_DESTROYED 3139 is_destroyed = CF_DESTROYED
3140 is_suspended = CF_SUSPENDED
1424 CODE: 3141 CODE:
1425 RETVAL = boolSV (coro->flags & ix); 3142 RETVAL = boolSV (coro->flags & ix);
1426 OUTPUT: 3143 OUTPUT:
1427 RETVAL 3144 RETVAL
1428 3145
1429IV 3146void
3147throw (Coro::State self, SV *throw = &PL_sv_undef)
3148 PROTOTYPE: $;$
3149 CODE:
3150{
3151 struct coro *current = SvSTATE_current;
3152 SV **throwp = self == current ? &CORO_THROW : &self->except;
3153 SvREFCNT_dec (*throwp);
3154 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3155}
3156
3157void
3158api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3159 PROTOTYPE: $;$
3160 C_ARGS: aTHX_ coro, flags
3161
3162SV *
3163has_cctx (Coro::State coro)
3164 PROTOTYPE: $
3165 CODE:
3166 /* maybe manage the running flag differently */
3167 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3168 OUTPUT:
3169 RETVAL
3170
3171int
3172is_traced (Coro::State coro)
3173 PROTOTYPE: $
3174 CODE:
3175 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3176 OUTPUT:
3177 RETVAL
3178
3179UV
1430rss (Coro::State coro) 3180rss (Coro::State coro)
1431 PROTOTYPE: $ 3181 PROTOTYPE: $
3182 ALIAS:
3183 usecount = 1
1432 CODE: 3184 CODE:
1433 RETVAL = coro_rss (coro); 3185 switch (ix)
3186 {
3187 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3188 case 1: RETVAL = coro->usecount; break;
3189 }
1434 OUTPUT: 3190 OUTPUT:
1435 RETVAL 3191 RETVAL
1436 3192
3193void
3194force_cctx ()
3195 PROTOTYPE:
3196 CODE:
3197 cctx_current->idle_sp = 0;
3198
3199void
3200swap_defsv (Coro::State self)
3201 PROTOTYPE: $
3202 ALIAS:
3203 swap_defav = 1
3204 CODE:
3205 if (!self->slot)
3206 croak ("cannot swap state with coroutine that has no saved state,");
3207 else
3208 {
3209 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3210 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3211
3212 SV *tmp = *src; *src = *dst; *dst = tmp;
3213 }
3214
3215void
3216cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3220
1437 3221
1438MODULE = Coro::State PACKAGE = Coro 3222MODULE = Coro::State PACKAGE = Coro
1439 3223
1440BOOT: 3224BOOT:
1441{ 3225{
1442 int i; 3226 int i;
1443 3227
3228 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3229 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3230 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3231 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3232 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3233 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3234 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3235 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3236 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3237
3238 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3239 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3240 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3241 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3242
1444 coro_stash = gv_stashpv ("Coro", TRUE); 3243 coro_stash = gv_stashpv ("Coro", TRUE);
1445 3244
1446 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3245 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1447 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3246 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1448 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3247 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1449 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3248 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1450 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3249 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1451 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3250 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1452 3251
1453 coro_current = get_sv ("Coro::current", FALSE);
1454 SvREADONLY_on (coro_current);
1455
1456 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1457 coro_ready[i] = newAV ();
1458
1459 { 3252 {
1460 SV *sv = perl_get_sv("Coro::API", 1); 3253 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1461 3254
1462 coroapi.schedule = api_schedule; 3255 coroapi.schedule = api_schedule;
1463 coroapi.save = api_save; 3256 coroapi.schedule_to = api_schedule_to;
1464 coroapi.cede = api_cede; 3257 coroapi.cede = api_cede;
1465 coroapi.cede_notself = api_cede_notself; 3258 coroapi.cede_notself = api_cede_notself;
1466 coroapi.ready = api_ready; 3259 coroapi.ready = api_ready;
1467 coroapi.is_ready = api_is_ready; 3260 coroapi.is_ready = api_is_ready;
1468 coroapi.nready = &coro_nready; 3261 coroapi.nready = coro_nready;
1469 coroapi.current = coro_current; 3262 coroapi.current = coro_current;
1470 3263
1471 GCoroAPI = &coroapi; 3264 /*GCoroAPI = &coroapi;*/
1472 sv_setiv (sv, (IV)&coroapi); 3265 sv_setiv (sv, (IV)&coroapi);
1473 SvREADONLY_on (sv); 3266 SvREADONLY_on (sv);
1474 } 3267 }
1475} 3268}
3269
3270void
3271terminate (...)
3272 CODE:
3273 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3274
3275void
3276schedule (...)
3277 CODE:
3278 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3279
3280void
3281schedule_to (...)
3282 CODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3284
3285void
3286cede_to (...)
3287 CODE:
3288 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3289
3290void
3291cede (...)
3292 CODE:
3293 CORO_EXECUTE_SLF_XS (slf_init_cede);
3294
3295void
3296cede_notself (...)
3297 CODE:
3298 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1476 3299
1477void 3300void
1478_set_current (SV *current) 3301_set_current (SV *current)
1479 PROTOTYPE: $ 3302 PROTOTYPE: $
1480 CODE: 3303 CODE:
1481 SvREFCNT_dec (SvRV (coro_current)); 3304 SvREFCNT_dec (SvRV (coro_current));
1482 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3305 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3306
3307void
3308_set_readyhook (SV *hook)
3309 PROTOTYPE: $
3310 CODE:
3311 SvREFCNT_dec (coro_readyhook);
3312 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1483 3313
1484int 3314int
1485prio (Coro::State coro, int newprio = 0) 3315prio (Coro::State coro, int newprio = 0)
3316 PROTOTYPE: $;$
1486 ALIAS: 3317 ALIAS:
1487 nice = 1 3318 nice = 1
1488 CODE: 3319 CODE:
1489{ 3320{
1490 RETVAL = coro->prio; 3321 RETVAL = coro->prio;
… …
1505 3336
1506SV * 3337SV *
1507ready (SV *self) 3338ready (SV *self)
1508 PROTOTYPE: $ 3339 PROTOTYPE: $
1509 CODE: 3340 CODE:
1510 RETVAL = boolSV (api_ready (self)); 3341 RETVAL = boolSV (api_ready (aTHX_ self));
1511 OUTPUT: 3342 OUTPUT:
1512 RETVAL 3343 RETVAL
1513 3344
1514int 3345int
1515nready (...) 3346nready (...)
… …
1517 CODE: 3348 CODE:
1518 RETVAL = coro_nready; 3349 RETVAL = coro_nready;
1519 OUTPUT: 3350 OUTPUT:
1520 RETVAL 3351 RETVAL
1521 3352
1522MODULE = Coro::State PACKAGE = Coro::AIO 3353void
3354suspend (Coro::State self)
3355 PROTOTYPE: $
3356 CODE:
3357 self->flags |= CF_SUSPENDED;
3358
3359void
3360resume (Coro::State self)
3361 PROTOTYPE: $
3362 CODE:
3363 self->flags &= ~CF_SUSPENDED;
3364
3365void
3366_pool_handler (...)
3367 CODE:
3368 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3369
3370void
3371async_pool (SV *cv, ...)
3372 PROTOTYPE: &@
3373 PPCODE:
3374{
3375 HV *hv = (HV *)av_pop (av_async_pool);
3376 AV *av = newAV ();
3377 SV *cb = ST (0);
3378 int i;
3379
3380 av_extend (av, items - 2);
3381 for (i = 1; i < items; ++i)
3382 av_push (av, SvREFCNT_inc_NN (ST (i)));
3383
3384 if ((SV *)hv == &PL_sv_undef)
3385 {
3386 PUSHMARK (SP);
3387 EXTEND (SP, 2);
3388 PUSHs (sv_Coro);
3389 PUSHs ((SV *)cv_pool_handler);
3390 PUTBACK;
3391 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3392 SPAGAIN;
3393
3394 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3395 }
3396
3397 {
3398 struct coro *coro = SvSTATE_hv (hv);
3399
3400 assert (!coro->invoke_cb);
3401 assert (!coro->invoke_av);
3402 coro->invoke_cb = SvREFCNT_inc (cb);
3403 coro->invoke_av = av;
3404 }
3405
3406 api_ready (aTHX_ (SV *)hv);
3407
3408 if (GIMME_V != G_VOID)
3409 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3410 else
3411 SvREFCNT_dec (hv);
3412}
1523 3413
1524SV * 3414SV *
1525_get_state () 3415rouse_cb ()
3416 PROTOTYPE:
1526 CODE: 3417 CODE:
1527{ 3418 RETVAL = coro_new_rouse_cb (aTHX);
1528 struct io_state *data;
1529
1530 RETVAL = newSV (sizeof (struct io_state));
1531 data = (struct io_state *)SvPVX (RETVAL);
1532 SvCUR_set (RETVAL, sizeof (struct io_state));
1533 SvPOK_only (RETVAL);
1534
1535 data->errorno = errno;
1536 data->laststype = PL_laststype;
1537 data->laststatval = PL_laststatval;
1538 data->statcache = PL_statcache;
1539}
1540 OUTPUT: 3419 OUTPUT:
1541 RETVAL 3420 RETVAL
1542 3421
1543void 3422void
1544_set_state (char *data_) 3423rouse_wait (...)
3424 PROTOTYPE: ;$
3425 PPCODE:
3426 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3427
3428void
3429on_enter (SV *block)
3430 ALIAS:
3431 on_leave = 1
1545 PROTOTYPE: $ 3432 PROTOTYPE: &
1546 CODE: 3433 CODE:
1547{ 3434{
1548 struct io_state *data = (void *)data_; 3435 struct coro *coro = SvSTATE_current;
3436 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1549 3437
1550 errno = data->errorno; 3438 block = (SV *)coro_sv_2cv (aTHX_ block);
1551 PL_laststype = data->laststype;
1552 PL_laststatval = data->laststatval;
1553 PL_statcache = data->statcache;
1554}
1555 3439
3440 if (!*avp)
3441 *avp = newAV ();
3442
3443 av_push (*avp, SvREFCNT_inc (block));
3444
3445 if (!ix)
3446 on_enterleave_call (aTHX_ block);
3447
3448 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3450 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3451}
3452
3453
3454MODULE = Coro::State PACKAGE = PerlIO::cede
3455
3456BOOT:
3457 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3458
3459
3460MODULE = Coro::State PACKAGE = Coro::Semaphore
3461
3462SV *
3463new (SV *klass, SV *count = 0)
3464 CODE:
3465 RETVAL = sv_bless (
3466 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3467 GvSTASH (CvGV (cv))
3468 );
3469 OUTPUT:
3470 RETVAL
3471
3472# helper for Coro::Channel and others
3473SV *
3474_alloc (int count)
3475 CODE:
3476 RETVAL = coro_waitarray_new (aTHX_ count);
3477 OUTPUT:
3478 RETVAL
3479
3480SV *
3481count (SV *self)
3482 CODE:
3483 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3484 OUTPUT:
3485 RETVAL
3486
3487void
3488up (SV *self, int adjust = 1)
3489 ALIAS:
3490 adjust = 1
3491 CODE:
3492 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3493
3494void
3495down (...)
3496 CODE:
3497 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3498
3499void
3500wait (...)
3501 CODE:
3502 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3503
3504void
3505try (SV *self)
3506 PPCODE:
3507{
3508 AV *av = (AV *)SvRV (self);
3509 SV *count_sv = AvARRAY (av)[0];
3510 IV count = SvIVX (count_sv);
3511
3512 if (count > 0)
3513 {
3514 --count;
3515 SvIVX (count_sv) = count;
3516 XSRETURN_YES;
3517 }
3518 else
3519 XSRETURN_NO;
3520}
3521
3522void
3523waiters (SV *self)
3524 PPCODE:
3525{
3526 AV *av = (AV *)SvRV (self);
3527 int wcount = AvFILLp (av) + 1 - 1;
3528
3529 if (GIMME_V == G_SCALAR)
3530 XPUSHs (sv_2mortal (newSViv (wcount)));
3531 else
3532 {
3533 int i;
3534 EXTEND (SP, wcount);
3535 for (i = 1; i <= wcount; ++i)
3536 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3537 }
3538}
3539
3540MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3541
3542void
3543_may_delete (SV *sem, int count, int extra_refs)
3544 PPCODE:
3545{
3546 AV *av = (AV *)SvRV (sem);
3547
3548 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3549 && AvFILLp (av) == 0 /* no waiters, just count */
3550 && SvIV (AvARRAY (av)[0]) == count)
3551 XSRETURN_YES;
3552
3553 XSRETURN_NO;
3554}
3555
3556MODULE = Coro::State PACKAGE = Coro::Signal
3557
3558SV *
3559new (SV *klass)
3560 CODE:
3561 RETVAL = sv_bless (
3562 coro_waitarray_new (aTHX_ 0),
3563 GvSTASH (CvGV (cv))
3564 );
3565 OUTPUT:
3566 RETVAL
3567
3568void
3569wait (...)
3570 CODE:
3571 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3572
3573void
3574broadcast (SV *self)
3575 CODE:
3576{
3577 AV *av = (AV *)SvRV (self);
3578 coro_signal_wake (aTHX_ av, AvFILLp (av));
3579}
3580
3581void
3582send (SV *self)
3583 CODE:
3584{
3585 AV *av = (AV *)SvRV (self);
3586
3587 if (AvFILLp (av))
3588 coro_signal_wake (aTHX_ av, 1);
3589 else
3590 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3591}
3592
3593IV
3594awaited (SV *self)
3595 CODE:
3596 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3597 OUTPUT:
3598 RETVAL
3599
3600
3601MODULE = Coro::State PACKAGE = Coro::AnyEvent
3602
3603BOOT:
3604 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3605
3606void
3607_schedule (...)
3608 CODE:
3609{
3610 static int incede;
3611
3612 api_cede_notself (aTHX);
3613
3614 ++incede;
3615 while (coro_nready >= incede && api_cede (aTHX))
3616 ;
3617
3618 sv_setsv (sv_activity, &PL_sv_undef);
3619 if (coro_nready >= incede)
3620 {
3621 PUSHMARK (SP);
3622 PUTBACK;
3623 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3624 }
3625
3626 --incede;
3627}
3628
3629
3630MODULE = Coro::State PACKAGE = Coro::AIO
3631
3632void
3633_register (char *target, char *proto, SV *req)
3634 CODE:
3635{
3636 CV *req_cv = coro_sv_2cv (aTHX_ req);
3637 /* newXSproto doesn't return the CV on 5.8 */
3638 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3639 sv_setpv ((SV *)slf_cv, proto);
3640 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3641}
3642

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