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Comparing Coro/Coro/State.xs (file contents):
Revision 1.153 by root, Thu Sep 20 12:18:00 2007 UTC vs.
Revision 1.347 by root, Wed Jun 10 00:00:02 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;
… …
395 /* 607 /*
396 * the worst thing you can imagine happens first - we have to save 608 * the worst thing you can imagine happens first - we have to save
397 * (and reinitialize) all cv's in the whole callchain :( 609 * (and reinitialize) all cv's in the whole callchain :(
398 */ 610 */
399 611
400 EXTEND (SP, 3 + 1);
401 PUSHs (Nullsv); 612 XPUSHs (Nullsv);
402 /* this loop was inspired by pp_caller */ 613 /* this loop was inspired by pp_caller */
403 for (;;) 614 for (;;)
404 { 615 {
405 while (cxix >= 0) 616 while (expect_true (cxix >= 0))
406 { 617 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 618 PERL_CONTEXT *cx = &ccstk[cxix--];
408 619
409 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 620 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
410 { 621 {
411 CV *cv = cx->blk_sub.cv; 622 CV *cv = cx->blk_sub.cv;
412 623
413 if (CvDEPTH (cv)) 624 if (expect_true (CvDEPTH (cv)))
414 { 625 {
415 EXTEND (SP, 3); 626 EXTEND (SP, 3);
416 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
417 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
419 630
420 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
421 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
422 } 633 }
423 } 634 }
424 } 635 }
425 636
426 if (top_si->si_type == PERLSI_MAIN) 637 if (expect_true (top_si->si_type == PERLSI_MAIN))
427 break; 638 break;
428 639
429 top_si = top_si->si_prev; 640 top_si = top_si->si_prev;
430 ccstk = top_si->si_cxstack; 641 ccstk = top_si->si_cxstack;
431 cxix = top_si->si_cxix; 642 cxix = top_si->si_cxix;
432 } 643 }
433 644
434 PUTBACK; 645 PUTBACK;
435 } 646 }
436 647
437 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 */
438 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 649 /* we manually unroll here, as usually 2 slots is enough */
439 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 650 if (SLOT_COUNT >= 1) CXINC;
440 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 651 if (SLOT_COUNT >= 2) CXINC;
441 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 */
442 659
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
443#define VAR(name,type)c->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
444# include "state.h" 672 # include "state.h"
445#undef VAR 673 #undef VAR
674 }
446} 675}
447 676
448/* 677/*
449 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
450 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
451 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
452 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
453 */ 682 */
454#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
455# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
456#else 685#else
457static void 686static void
458coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
459{ 688{
460 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 689 PL_curstackinfo = new_stackinfo(32, 8);
461 PL_curstackinfo->si_type = PERLSI_MAIN; 690 PL_curstackinfo->si_type = PERLSI_MAIN;
462 PL_curstack = PL_curstackinfo->si_stack; 691 PL_curstack = PL_curstackinfo->si_stack;
463 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 692 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
464 693
465 PL_stack_base = AvARRAY(PL_curstack); 694 PL_stack_base = AvARRAY(PL_curstack);
466 PL_stack_sp = PL_stack_base; 695 PL_stack_sp = PL_stack_base;
467 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 696 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
468 697
469 New(50,PL_tmps_stack,128,SV*); 698 New(50,PL_tmps_stack,32,SV*);
470 PL_tmps_floor = -1; 699 PL_tmps_floor = -1;
471 PL_tmps_ix = -1; 700 PL_tmps_ix = -1;
472 PL_tmps_max = 128; 701 PL_tmps_max = 32;
473 702
474 New(54,PL_markstack,32,I32); 703 New(54,PL_markstack,16,I32);
475 PL_markstack_ptr = PL_markstack; 704 PL_markstack_ptr = PL_markstack;
476 PL_markstack_max = PL_markstack + 32; 705 PL_markstack_max = PL_markstack + 16;
477 706
478#ifdef SET_MARK_OFFSET 707#ifdef SET_MARK_OFFSET
479 SET_MARK_OFFSET; 708 SET_MARK_OFFSET;
480#endif 709#endif
481 710
482 New(54,PL_scopestack,32,I32); 711 New(54,PL_scopestack,8,I32);
483 PL_scopestack_ix = 0; 712 PL_scopestack_ix = 0;
484 PL_scopestack_max = 32; 713 PL_scopestack_max = 8;
485 714
486 New(54,PL_savestack,64,ANY); 715 New(54,PL_savestack,24,ANY);
487 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
488 PL_savestack_max = 64; 717 PL_savestack_max = 24;
489 718
490#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
491 New(54,PL_retstack,16,OP*); 720 New(54,PL_retstack,4,OP*);
492 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
493 PL_retstack_max = 16; 722 PL_retstack_max = 4;
494#endif 723#endif
495} 724}
496#endif 725#endif
497 726
498/* 727/*
499 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
500 */ 729 */
501static void 730static void
502coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
503{ 732{
504 if (!IN_DESTRUCT)
505 {
506 /* restore all saved variables and stuff */
507 LEAVE_SCOPE (0);
508 assert (PL_tmps_floor == -1);
509
510 /* free all temporaries */
511 FREETMPS;
512 assert (PL_tmps_ix == -1);
513
514 /* unwind all extra stacks */
515 POPSTACK_TO (PL_mainstack);
516
517 /* unwind main stack */
518 dounwind (-1);
519 }
520
521 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
522 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
523 735
524 while (PL_curstackinfo) 736 while (PL_curstackinfo)
525 { 737 {
… …
535 747
536 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
537 Safefree (PL_markstack); 749 Safefree (PL_markstack);
538 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
539 Safefree (PL_savestack); 751 Safefree (PL_savestack);
540#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
541 Safefree (PL_retstack); 753 Safefree (PL_retstack);
542#endif 754#endif
543} 755}
544 756
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
545static size_t 766static size_t
546coro_rss (struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
547{ 768{
548 size_t rss = sizeof (coro); 769 size_t rss = sizeof (*coro);
549 770
550 if (coro->mainstack) 771 if (coro->mainstack)
551 { 772 {
552 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
553 { 774 {
554 #define VAR(name,type)coro->name = PL_ ## name; 775 #define SYM(sym) PL_ ## sym
555 # include "state.h" 776 CORO_RSS;
556 #undef VAR 777 #undef SYM
557 } 778 }
558 779 else
559 rss += sizeof (coro->curstackinfo); 780 {
560 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 781 #define SYM(sym) coro->slot->sym
561 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 782 CORO_RSS;
562 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 783 #undef SYM
563 rss += coro->tmps_max * sizeof (SV *); 784 }
564 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
565 rss += coro->scopestack_max * sizeof (I32);
566 rss += coro->savestack_max * sizeof (ANY);
567
568#if !PERL_VERSION_ATLEAST (5,9,0)
569 rss += coro->retstack_max * sizeof (OP *);
570#endif
571 } 785 }
572 786
573 return rss; 787 return rss;
574} 788}
575 789
576/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
577 791
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 */
578static 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 */
579setup_coro (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
580{ 902{
581 /* 903 /*
582 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
583 */ 905 */
584 coro_init_stacks (aTHX); 906 coro_init_stacks (aTHX);
585 907
908 PL_runops = RUNOPS_DEFAULT;
586 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
587 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
588 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
589 PL_curpm = 0; 915 PL_curpm = 0;
916 PL_curpad = 0;
590 PL_localizing = 0; 917 PL_localizing = 0;
591 PL_dirty = 0; 918 PL_dirty = 0;
592 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);
593 936
594 { 937 {
595 dSP; 938 dSP;
596 LOGOP myop; 939 UNOP myop;
597 940
598 SvREFCNT_dec (GvAV (PL_defgv));
599 GvAV (PL_defgv) = coro->args; coro->args = 0;
600
601 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
602 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
603 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
604 945
605 PUSHMARK (SP); 946 PUSHMARK (SP);
606 XPUSHs (av_shift (GvAV (PL_defgv))); 947 PUSHs ((SV *)coro->startcv);
607 PUTBACK; 948 PUTBACK;
608 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
609 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
610 SPAGAIN;
611 } 951 }
612 952
613 ENTER; /* necessary e.g. for dounwind */ 953 /* this newly created coroutine might be run on an existing cctx which most
614} 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 */
615 958
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
616static 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
617free_coro_mortal (pTHX) 1017free_coro_mortal (pTHX)
618{ 1018{
619 if (coro_mortal) 1019 if (expect_true (coro_mortal))
620 { 1020 {
621 SvREFCNT_dec (coro_mortal); 1021 SvREFCNT_dec (coro_mortal);
622 coro_mortal = 0; 1022 coro_mortal = 0;
623 } 1023 }
624} 1024}
625 1025
626/* inject a fake call to Coro::State::_cctx_init into the execution */ 1026static int
627/* _cctx_init should be careful, as it could be called at almost any time */ 1027runops_trace (pTHX)
628/* 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 */
629static void NOINLINE 1164static void NOINLINE
630prepare_cctx (pTHX_ coro_cctx *cctx) 1165cctx_prepare (pTHX)
631{ 1166{
632 dSP; 1167 PL_top_env = &PL_start_env;
633 LOGOP myop;
634 1168
635 Zero (&myop, 1, LOGOP); 1169 if (cctx_current->flags & CC_TRACE)
636 myop.op_next = PL_op; 1170 PL_runops = runops_trace;
637 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
638 1171
639 PUSHMARK (SP); 1172 /* we already must be executing an SLF op, there is no other valid way
640 EXTEND (SP, 2); 1173 * that can lead to creation of a new cctx */
641 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
642 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
643 PUTBACK; 1176
644 PL_op = (OP *)&myop; 1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1178 cctx_ssl_frame = slf_frame;
646 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);
647} 1189}
648 1190
649/* 1191/*
650 * this is a _very_ stripped down perl interpreter ;) 1192 * this is a _very_ stripped down perl interpreter ;)
651 */ 1193 */
652static void 1194static void
653coro_run (void *arg) 1195cctx_run (void *arg)
654{ 1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
655 dTHX; 1203 dTHX;
656 1204
657 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1205 /* normally we would need to skip the entersub here */
658 UNLOCK; 1206 /* not doing so will re-execute it, which is exactly what we want */
1207 /* PL_nop = PL_nop->op_next */
659 1208
660 PL_top_env = &PL_start_env;
661
662 /* inject a fake subroutine call to cctx_init */ 1209 /* inject a fake subroutine call to cctx_init */
663 prepare_cctx (aTHX_ (coro_cctx *)arg); 1210 cctx_prepare (aTHX);
664 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
665 /* 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 */
666 PL_restartop = PL_op; 1216 PL_restartop = PL_op;
667 perl_run (PL_curinterp); 1217 perl_run (PL_curinterp);
668
669 /* 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 /*
670 * 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
671 * 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)
672 * 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
673 * bootstrap-time "top" top_env, as we cannot restore the "main" 1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
674 * 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.
675 */ 1231 */
676 PL_top_env = main_top_env; 1232 PL_top_env = main_top_env;
677 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 }
678} 1235}
679 1236
680static coro_cctx * 1237static coro_cctx *
681cctx_new () 1238cctx_new ()
682{ 1239{
683 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 ();
684 void *stack_start; 1269 void *stack_start;
685 size_t stack_size; 1270 size_t stack_size;
686 1271
687 ++cctx_count;
688
689 Newz (0, cctx, 1, coro_cctx);
690
691#if HAVE_MMAP 1272#if HAVE_MMAP
692
693 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;
694 /* mmap supposedly does allocate-on-write for us */ 1274 /* mmap supposedly does allocate-on-write for us */
695 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);
696 1276
697 if (cctx->sptr != (void *)-1) 1277 if (cctx->sptr != (void *)-1)
698 { 1278 {
699# if CORO_STACKGUARD 1279 #if CORO_STACKGUARD
700 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
701# endif 1281 #endif
702 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
703 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
704 cctx->mapped = 1; 1284 cctx->flags |= CC_MAPPED;
705 } 1285 }
706 else 1286 else
707#endif 1287#endif
708 { 1288 {
709 cctx->ssize = coro_stacksize * (long)sizeof (long); 1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
710 New (0, cctx->sptr, coro_stacksize, long); 1290 New (0, cctx->sptr, cctx_stacksize, long);
711 1291
712 if (!cctx->sptr) 1292 if (!cctx->sptr)
713 { 1293 {
714 perror ("FATAL: unable to allocate stack for coroutine"); 1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
715 _exit (EXIT_FAILURE); 1295 _exit (EXIT_FAILURE);
716 } 1296 }
717 1297
718 stack_start = cctx->sptr; 1298 stack_start = cctx->sptr;
719 stack_size = cctx->ssize; 1299 stack_size = cctx->ssize;
720 } 1300 }
721 1301
722 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
723 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);
724 1307
725 return cctx; 1308 return cctx;
726} 1309}
727 1310
728static void 1311static void
729cctx_destroy (coro_cctx *cctx) 1312cctx_destroy (coro_cctx *cctx)
730{ 1313{
731 if (!cctx) 1314 if (!cctx)
732 return; 1315 return;
733 1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
734 --cctx_count; 1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
735 1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
736#if CORO_USE_VALGRIND 1325 #if CORO_USE_VALGRIND
737 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
738#endif 1327 #endif
739 1328
740#if HAVE_MMAP 1329#if HAVE_MMAP
741 if (cctx->mapped) 1330 if (cctx->flags & CC_MAPPED)
742 munmap (cctx->sptr, cctx->ssize); 1331 munmap (cctx->sptr, cctx->ssize);
743 else 1332 else
744#endif 1333#endif
745 Safefree (cctx->sptr); 1334 Safefree (cctx->sptr);
1335 }
746 1336
747 Safefree (cctx); 1337 Safefree (cctx);
748} 1338}
1339
1340/* wether this cctx should be destructed */
1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
749 1342
750static coro_cctx * 1343static coro_cctx *
751cctx_get (pTHX) 1344cctx_get (pTHX)
752{ 1345{
753 while (cctx_first) 1346 while (expect_true (cctx_first))
754 { 1347 {
755 coro_cctx *cctx = cctx_first; 1348 coro_cctx *cctx = cctx_first;
756 cctx_first = cctx->next; 1349 cctx_first = cctx->next;
757 --cctx_idle; 1350 --cctx_idle;
758 1351
759 if (cctx->ssize >= coro_stacksize) 1352 if (expect_true (!CCTX_EXPIRED (cctx)))
760 return cctx; 1353 return cctx;
761 1354
762 cctx_destroy (cctx); 1355 cctx_destroy (cctx);
763 } 1356 }
764 1357
765 PL_op = PL_op->op_next;
766 return cctx_new (); 1358 return cctx_new_run ();
767} 1359}
768 1360
769static void 1361static void
770cctx_put (coro_cctx *cctx) 1362cctx_put (coro_cctx *cctx)
771{ 1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
772 /* free another cctx if overlimit */ 1366 /* free another cctx if overlimit */
773 if (cctx_idle >= MAX_IDLE_CCTX) 1367 if (expect_false (cctx_idle >= cctx_max_idle))
774 { 1368 {
775 coro_cctx *first = cctx_first; 1369 coro_cctx *first = cctx_first;
776 cctx_first = first->next; 1370 cctx_first = first->next;
777 --cctx_idle; 1371 --cctx_idle;
778 1372
779 assert (!first->inuse);
780 cctx_destroy (first); 1373 cctx_destroy (first);
781 } 1374 }
782 1375
783 ++cctx_idle; 1376 ++cctx_idle;
784 cctx->next = cctx_first; 1377 cctx->next = cctx_first;
785 cctx_first = cctx; 1378 cctx_first = cctx;
786} 1379}
787 1380
788/** coroutine switching *****************************************************/ 1381/** coroutine switching *****************************************************/
789 1382
790/* never call directly, always through the coro_state_transfer global variable */ 1383static void
791static void NOINLINE
792transfer (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)
793{ 1406{
794 dSTACKLEVEL; 1407 dSTACKLEVEL;
795 1408
796 /* sometimes transfer is only called to set idle_sp */ 1409 /* sometimes transfer is only called to set idle_sp */
797 if (!next) 1410 if (expect_false (!prev))
798 { 1411 {
799 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1412 cctx_current->idle_sp = STACKLEVEL;
800 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 */
801 }
802 else if (prev != next)
803 { 1414 }
1415 else if (expect_true (prev != next))
1416 {
804 coro_cctx *prev__cctx; 1417 coro_cctx *cctx_prev;
805 1418
806 if (prev->flags & CF_NEW) 1419 if (expect_false (prev->flags & CF_NEW))
807 { 1420 {
808 /* create a new empty context */ 1421 /* create a new empty/source context */
809 Newz (0, prev->cctx, 1, coro_cctx);
810 prev->cctx->inuse = 1;
811 prev->flags &= ~CF_NEW; 1422 prev->flags &= ~CF_NEW;
812 prev->flags |= CF_RUNNING; 1423 prev->flags |= CF_RUNNING;
813 } 1424 }
814 1425
815 /*TODO: must not croak here */
816 if (!prev->flags & CF_RUNNING)
817 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
818
819 if (next->flags & CF_RUNNING)
820 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
821
822 if (next->flags & CF_DESTROYED)
823 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
824
825 prev->flags &= ~CF_RUNNING; 1426 prev->flags &= ~CF_RUNNING;
826 next->flags |= CF_RUNNING; 1427 next->flags |= CF_RUNNING;
827 1428
828 LOCK; 1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
829 1431
830 if (next->flags & CF_NEW) 1432 if (expect_false (next->flags & CF_NEW))
831 { 1433 {
832 /* need to start coroutine */ 1434 /* need to start coroutine */
833 next->flags &= ~CF_NEW; 1435 next->flags &= ~CF_NEW;
834 /* first get rid of the old state */
835 save_perl (aTHX_ prev);
836 /* setup coroutine call */ 1436 /* setup coroutine call */
837 setup_coro (aTHX_ next); 1437 coro_setup (aTHX_ next);
838 /* need a new stack */
839 assert (!next->cctx);
840 } 1438 }
841 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 ))
842 { 1448 {
843 /* coroutine already started */ 1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
844 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));
845 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);
846 } 1459 }
1460 else
1461 prev->cctx = cctx_current;
847 1462
848 prev__cctx = prev->cctx; 1463 ++next->usecount;
849 1464
850 /* possibly "free" the cctx */ 1465 cctx_prev = cctx_current;
851 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))
852 { 1471 {
853 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1472 cctx_prev->top_env = PL_top_env;
854 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;
855 1474 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
856 prev->cctx = 0;
857
858 cctx_put (prev__cctx);
859 prev__cctx->inuse = 0;
860 } 1475 }
861 1476
862 if (!next->cctx) 1477 transfer_tail (aTHX);
863 {
864 next->cctx = cctx_get (aTHX);
865 assert (!next->cctx->inuse);
866 next->cctx->inuse = 1;
867 }
868
869 if (prev__cctx != next->cctx)
870 {
871 prev__cctx->top_env = PL_top_env;
872 PL_top_env = next->cctx->top_env;
873 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
874 }
875
876 free_coro_mortal (aTHX);
877 UNLOCK;
878 } 1478 }
879} 1479}
880 1480
881struct transfer_args 1481#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
882{
883 struct coro *prev, *next;
884};
885
886#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
887 1483
888/** high level stuff ********************************************************/ 1484/** high level stuff ********************************************************/
889 1485
890static int 1486static int
891coro_state_destroy (pTHX_ struct coro *coro) 1487coro_state_destroy (pTHX_ struct coro *coro)
892{ 1488{
893 if (coro->flags & CF_DESTROYED) 1489 if (coro->flags & CF_DESTROYED)
894 return 0; 1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
895 1494
896 coro->flags |= CF_DESTROYED; 1495 coro->flags |= CF_DESTROYED;
897 1496
898 if (coro->flags & CF_READY) 1497 if (coro->flags & CF_READY)
899 { 1498 {
900 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
901 /* alternative: look through all ready queues and remove the coro */ 1500 /* alternative: look through all ready queues and remove the coro */
902 LOCK;
903 --coro_nready; 1501 --coro_nready;
904 UNLOCK;
905 } 1502 }
906 else 1503 else
907 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 */
908 1505
909 if (coro->mainstack && coro->mainstack != main_mainstack) 1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
910 { 1510 {
911 struct coro temp; 1511 struct coro *current = SvSTATE_current;
912 1512
913 assert (!(coro->flags & CF_RUNNING)); 1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
914 1514
915 Zero (&temp, 1, struct coro);
916 temp.save = CORO_SAVE_ALL;
917
918 if (coro->flags & CF_RUNNING)
919 croak ("FATAL: tried to destroy currently running coroutine");
920
921 save_perl (aTHX_ &temp); 1515 save_perl (aTHX_ current);
922 load_perl (aTHX_ coro); 1516 load_perl (aTHX_ coro);
923 1517
924 coro_destroy_stacks (aTHX); 1518 coro_destruct_perl (aTHX_ coro);
925 1519
926 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1520 load_perl (aTHX_ current);
927 1521
928 coro->mainstack = 0; 1522 coro->slot = 0;
929 } 1523 }
930 1524
931 cctx_destroy (coro->cctx); 1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
932 SvREFCNT_dec (coro->args); 1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
933 1529
934 if (coro->next) coro->next->prev = coro->prev; 1530 if (coro->next) coro->next->prev = coro->prev;
935 if (coro->prev) coro->prev->next = coro->next; 1531 if (coro->prev) coro->prev->next = coro->next;
936 if (coro == coro_first) coro_first = coro->next; 1532 if (coro == coro_first) coro_first = coro->next;
937 1533
… …
974#else 1570#else
975# define MGf_DUP 0 1571# define MGf_DUP 0
976#endif 1572#endif
977}; 1573};
978 1574
979static struct coro *
980SvSTATE_ (pTHX_ SV *coro)
981{
982 HV *stash;
983 MAGIC *mg;
984
985 if (SvROK (coro))
986 coro = SvRV (coro);
987
988 stash = SvSTASH (coro);
989 if (stash != coro_stash && stash != coro_state_stash)
990 {
991 /* very slow, but rare, check */
992 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
993 croak ("Coro::State object required");
994 }
995
996 mg = CORO_MAGIC (coro);
997 return (struct coro *)mg->mg_ptr;
998}
999
1000#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1001
1002static void 1575static void
1003prepare_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)
1004{ 1577{
1005 ta->prev = SvSTATE (prev_sv); 1578 ta->prev = SvSTATE (prev_sv);
1006 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE (next_sv);
1580 TRANSFER_CHECK (*ta);
1007} 1581}
1008 1582
1009static void 1583static void
1010api_transfer (SV *prev_sv, SV *next_sv) 1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1011{ 1585{
1012 dTHX;
1013 struct transfer_args ta; 1586 struct coro_transfer_args ta;
1014 1587
1015 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1016 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 }
1017} 1645}
1018 1646
1019static int 1647static int
1020api_save (SV *coro_sv, int new_save)
1021{
1022 dTHX;
1023 struct coro *coro = SvSTATE (coro_sv);
1024 int old_save = coro->save;
1025
1026 if (new_save >= 0)
1027 coro->save = new_save;
1028
1029 return old_save;
1030}
1031
1032/** Coro ********************************************************************/
1033
1034static void
1035coro_enq (pTHX_ SV *coro_sv)
1036{
1037 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1038}
1039
1040static SV *
1041coro_deq (pTHX_ int min_prio)
1042{
1043 int prio = PRIO_MAX - PRIO_MIN;
1044
1045 min_prio -= PRIO_MIN;
1046 if (min_prio < 0)
1047 min_prio = 0;
1048
1049 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1050 if (AvFILLp (coro_ready [prio]) >= 0)
1051 return av_shift (coro_ready [prio]);
1052
1053 return 0;
1054}
1055
1056static int
1057api_ready (SV *coro_sv) 1648api_ready (pTHX_ SV *coro_sv)
1058{ 1649{
1059 dTHX;
1060 struct coro *coro; 1650 struct coro *coro;
1061 1651 SV *sv_hook;
1062 if (SvROK (coro_sv)) 1652 void (*xs_hook)(void);
1063 coro_sv = SvRV (coro_sv);
1064 1653
1065 coro = SvSTATE (coro_sv); 1654 coro = SvSTATE (coro_sv);
1066 1655
1067 if (coro->flags & CF_READY) 1656 if (coro->flags & CF_READY)
1068 return 0; 1657 return 0;
1069 1658
1070 coro->flags |= CF_READY; 1659 coro->flags |= CF_READY;
1071 1660
1072 LOCK; 1661 sv_hook = coro_nready ? 0 : coro_readyhook;
1073 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1662 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1663
1664 coro_enq (aTHX_ coro);
1074 ++coro_nready; 1665 ++coro_nready;
1075 UNLOCK; 1666
1667 if (sv_hook)
1668 {
1669 dSP;
1670
1671 ENTER;
1672 SAVETMPS;
1673
1674 PUSHMARK (SP);
1675 PUTBACK;
1676 call_sv (sv_hook, G_VOID | G_DISCARD);
1677
1678 FREETMPS;
1679 LEAVE;
1680 }
1681
1682 if (xs_hook)
1683 xs_hook ();
1076 1684
1077 return 1; 1685 return 1;
1078} 1686}
1079 1687
1080static int 1688static int
1081api_is_ready (SV *coro_sv) 1689api_is_ready (pTHX_ SV *coro_sv)
1082{ 1690{
1083 dTHX;
1084 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1691 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1085} 1692}
1086 1693
1694/* expects to own a reference to next->hv */
1695INLINE void
1696prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1697{
1698 SV *prev_sv = SvRV (coro_current);
1699
1700 ta->prev = SvSTATE_hv (prev_sv);
1701 ta->next = next;
1702
1703 TRANSFER_CHECK (*ta);
1704
1705 SvRV_set (coro_current, (SV *)next->hv);
1706
1707 free_coro_mortal (aTHX);
1708 coro_mortal = prev_sv;
1709}
1710
1087static void 1711static void
1088prepare_schedule (pTHX_ struct transfer_args *ta) 1712prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1089{ 1713{
1090 SV *prev_sv, *next_sv;
1091
1092 for (;;) 1714 for (;;)
1093 { 1715 {
1094 LOCK; 1716 struct coro *next = coro_deq (aTHX);
1095 next_sv = coro_deq (aTHX_ PRIO_MIN);
1096 1717
1718 if (expect_true (next))
1719 {
1720 /* cannot transfer to destroyed coros, skip and look for next */
1721 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1722 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1723 else
1724 {
1725 next->flags &= ~CF_READY;
1726 --coro_nready;
1727
1728 prepare_schedule_to (aTHX_ ta, next);
1729 break;
1730 }
1731 }
1732 else
1733 {
1097 /* nothing to schedule: call the idle handler */ 1734 /* nothing to schedule: call the idle handler */
1098 if (!next_sv) 1735 if (SvROK (sv_idle)
1736 && SvOBJECT (SvRV (sv_idle)))
1737 {
1738 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1739 api_ready (aTHX_ SvRV (sv_idle));
1740 --coro_nready;
1741 }
1742 else
1743 {
1744 dSP;
1745
1746 ENTER;
1747 SAVETMPS;
1748
1749 PUSHMARK (SP);
1750 PUTBACK;
1751 call_sv (sv_idle, G_VOID | G_DISCARD);
1752
1753 FREETMPS;
1754 LEAVE;
1755 }
1756 }
1757 }
1758}
1759
1760INLINE void
1761prepare_cede (pTHX_ struct coro_transfer_args *ta)
1762{
1763 api_ready (aTHX_ coro_current);
1764 prepare_schedule (aTHX_ ta);
1765}
1766
1767INLINE void
1768prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1769{
1770 SV *prev = SvRV (coro_current);
1771
1772 if (coro_nready)
1773 {
1774 prepare_schedule (aTHX_ ta);
1775 api_ready (aTHX_ prev);
1776 }
1777 else
1778 prepare_nop (aTHX_ ta);
1779}
1780
1781static void
1782api_schedule (pTHX)
1783{
1784 struct coro_transfer_args ta;
1785
1786 prepare_schedule (aTHX_ &ta);
1787 TRANSFER (ta, 1);
1788}
1789
1790static void
1791api_schedule_to (pTHX_ SV *coro_sv)
1792{
1793 struct coro_transfer_args ta;
1794 struct coro *next = SvSTATE (coro_sv);
1795
1796 SvREFCNT_inc_NN (coro_sv);
1797 prepare_schedule_to (aTHX_ &ta, next);
1798}
1799
1800static int
1801api_cede (pTHX)
1802{
1803 struct coro_transfer_args ta;
1804
1805 prepare_cede (aTHX_ &ta);
1806
1807 if (expect_true (ta.prev != ta.next))
1808 {
1809 TRANSFER (ta, 1);
1810 return 1;
1811 }
1812 else
1813 return 0;
1814}
1815
1816static int
1817api_cede_notself (pTHX)
1818{
1819 if (coro_nready)
1820 {
1821 struct coro_transfer_args ta;
1822
1823 prepare_cede_notself (aTHX_ &ta);
1824 TRANSFER (ta, 1);
1825 return 1;
1826 }
1827 else
1828 return 0;
1829}
1830
1831static void
1832api_trace (pTHX_ SV *coro_sv, int flags)
1833{
1834 struct coro *coro = SvSTATE (coro_sv);
1835
1836 if (coro->flags & CF_RUNNING)
1837 croak ("cannot enable tracing on a running coroutine, caught");
1838
1839 if (flags & CC_TRACE)
1840 {
1841 if (!coro->cctx)
1842 coro->cctx = cctx_new_run ();
1843 else if (!(coro->cctx->flags & CC_TRACE))
1844 croak ("cannot enable tracing on coroutine with custom stack, caught");
1845
1846 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1847 }
1848 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1849 {
1850 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1851
1852 if (coro->flags & CF_RUNNING)
1853 PL_runops = RUNOPS_DEFAULT;
1854 else
1855 coro->slot->runops = RUNOPS_DEFAULT;
1856 }
1857}
1858
1859static void
1860coro_call_on_destroy (pTHX_ struct coro *coro)
1861{
1862 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1863 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1864
1865 if (on_destroyp)
1866 {
1867 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1868
1869 while (AvFILLp (on_destroy) >= 0)
1870 {
1871 dSP; /* don't disturb outer sp */
1872 SV *cb = av_pop (on_destroy);
1873
1874 PUSHMARK (SP);
1875
1876 if (statusp)
1877 {
1878 int i;
1879 AV *status = (AV *)SvRV (*statusp);
1880 EXTEND (SP, AvFILLp (status) + 1);
1881
1882 for (i = 0; i <= AvFILLp (status); ++i)
1883 PUSHs (AvARRAY (status)[i]);
1884 }
1885
1886 PUTBACK;
1887 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1888 }
1889 }
1890}
1891
1892static void
1893slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1894{
1895 int i;
1896 HV *hv = (HV *)SvRV (coro_current);
1897 AV *av = newAV ();
1898
1899 av_extend (av, items - 1);
1900 for (i = 0; i < items; ++i)
1901 av_push (av, SvREFCNT_inc_NN (arg [i]));
1902
1903 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1904
1905 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1906 api_ready (aTHX_ sv_manager);
1907
1908 frame->prepare = prepare_schedule;
1909 frame->check = slf_check_repeat;
1910
1911 /* as a minor optimisation, we could unwind all stacks here */
1912 /* but that puts extra pressure on pp_slf, and is not worth much */
1913 /*coro_unwind_stacks (aTHX);*/
1914}
1915
1916/*****************************************************************************/
1917/* async pool handler */
1918
1919static int
1920slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1921{
1922 HV *hv = (HV *)SvRV (coro_current);
1923 struct coro *coro = (struct coro *)frame->data;
1924
1925 if (!coro->invoke_cb)
1926 return 1; /* loop till we have invoke */
1927 else
1928 {
1929 hv_store (hv, "desc", sizeof ("desc") - 1,
1930 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1931
1932 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1933
1934 {
1935 dSP;
1936 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1937 PUTBACK;
1938 }
1939
1940 SvREFCNT_dec (GvAV (PL_defgv));
1941 GvAV (PL_defgv) = coro->invoke_av;
1942 coro->invoke_av = 0;
1943
1944 return 0;
1945 }
1946}
1947
1948static void
1949slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1950{
1951 HV *hv = (HV *)SvRV (coro_current);
1952 struct coro *coro = SvSTATE_hv ((SV *)hv);
1953
1954 if (expect_true (coro->saved_deffh))
1955 {
1956 /* subsequent iteration */
1957 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1958 coro->saved_deffh = 0;
1959
1960 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1961 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1962 {
1963 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1964 coro->invoke_av = newAV ();
1965
1966 frame->prepare = prepare_nop;
1967 }
1968 else
1969 {
1970 av_clear (GvAV (PL_defgv));
1971 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1972
1973 coro->prio = 0;
1974
1975 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1976 api_trace (aTHX_ coro_current, 0);
1977
1978 frame->prepare = prepare_schedule;
1979 av_push (av_async_pool, SvREFCNT_inc (hv));
1980 }
1981 }
1982 else
1983 {
1984 /* first iteration, simply fall through */
1985 frame->prepare = prepare_nop;
1986 }
1987
1988 frame->check = slf_check_pool_handler;
1989 frame->data = (void *)coro;
1990}
1991
1992/*****************************************************************************/
1993/* rouse callback */
1994
1995#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1996
1997static void
1998coro_rouse_callback (pTHX_ CV *cv)
1999{
2000 dXSARGS;
2001 SV *data = (SV *)GENSUB_ARG;
2002
2003 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2004 {
2005 /* first call, set args */
2006 SV *coro = SvRV (data);
2007 AV *av = newAV ();
2008
2009 SvRV_set (data, (SV *)av);
2010
2011 /* better take a full copy of the arguments */
2012 while (items--)
2013 av_store (av, items, newSVsv (ST (items)));
2014
2015 api_ready (aTHX_ coro);
2016 SvREFCNT_dec (coro);
2017 }
2018
2019 XSRETURN_EMPTY;
2020}
2021
2022static int
2023slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2024{
2025 SV *data = (SV *)frame->data;
2026
2027 if (CORO_THROW)
2028 return 0;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 return 1;
2032
2033 /* now push all results on the stack */
2034 {
2035 dSP;
2036 AV *av = (AV *)SvRV (data);
2037 int i;
2038
2039 EXTEND (SP, AvFILLp (av) + 1);
2040 for (i = 0; i <= AvFILLp (av); ++i)
2041 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2042
2043 /* we have stolen the elements, so set length to zero and free */
2044 AvFILLp (av) = -1;
2045 av_undef (av);
2046
2047 PUTBACK;
2048 }
2049
2050 return 0;
2051}
2052
2053static void
2054slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2055{
2056 SV *cb;
2057
2058 if (items)
2059 cb = arg [0];
2060 else
2061 {
2062 struct coro *coro = SvSTATE_current;
2063
2064 if (!coro->rouse_cb)
2065 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2066
2067 cb = sv_2mortal (coro->rouse_cb);
2068 coro->rouse_cb = 0;
2069 }
2070
2071 if (!SvROK (cb)
2072 || SvTYPE (SvRV (cb)) != SVt_PVCV
2073 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2074 croak ("Coro::rouse_wait called with illegal callback argument,");
2075
2076 {
2077 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2078 SV *data = (SV *)GENSUB_ARG;
2079
2080 frame->data = (void *)data;
2081 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2082 frame->check = slf_check_rouse_wait;
2083 }
2084}
2085
2086static SV *
2087coro_new_rouse_cb (pTHX)
2088{
2089 HV *hv = (HV *)SvRV (coro_current);
2090 struct coro *coro = SvSTATE_hv (hv);
2091 SV *data = newRV_inc ((SV *)hv);
2092 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2093
2094 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2095 SvREFCNT_dec (data); /* magicext increases the refcount */
2096
2097 SvREFCNT_dec (coro->rouse_cb);
2098 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2099
2100 return cb;
2101}
2102
2103/*****************************************************************************/
2104/* schedule-like-function opcode (SLF) */
2105
2106static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2107static const CV *slf_cv;
2108static SV **slf_argv;
2109static int slf_argc, slf_arga; /* count, allocated */
2110static I32 slf_ax; /* top of stack, for restore */
2111
2112/* this restores the stack in the case we patched the entersub, to */
2113/* recreate the stack frame as perl will on following calls */
2114/* since entersub cleared the stack */
2115static OP *
2116pp_restore (pTHX)
2117{
2118 int i;
2119 SV **SP = PL_stack_base + slf_ax;
2120
2121 PUSHMARK (SP);
2122
2123 EXTEND (SP, slf_argc + 1);
2124
2125 for (i = 0; i < slf_argc; ++i)
2126 PUSHs (sv_2mortal (slf_argv [i]));
2127
2128 PUSHs ((SV *)CvGV (slf_cv));
2129
2130 RETURNOP (slf_restore.op_first);
2131}
2132
2133static void
2134slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2135{
2136 SV **arg = (SV **)slf_frame.data;
2137
2138 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2139}
2140
2141static void
2142slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2143{
2144 if (items != 2)
2145 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2146
2147 frame->prepare = slf_prepare_transfer;
2148 frame->check = slf_check_nop;
2149 frame->data = (void *)arg; /* let's hope it will stay valid */
2150}
2151
2152static void
2153slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2154{
2155 frame->prepare = prepare_schedule;
2156 frame->check = slf_check_nop;
2157}
2158
2159static void
2160slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2161{
2162 struct coro *next = (struct coro *)slf_frame.data;
2163
2164 SvREFCNT_inc_NN (next->hv);
2165 prepare_schedule_to (aTHX_ ta, next);
2166}
2167
2168static void
2169slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (!items)
2172 croak ("Coro::schedule_to expects a coroutine argument, caught");
2173
2174 frame->data = (void *)SvSTATE (arg [0]);
2175 frame->prepare = slf_prepare_schedule_to;
2176 frame->check = slf_check_nop;
2177}
2178
2179static void
2180slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 api_ready (aTHX_ SvRV (coro_current));
2183
2184 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2185}
2186
2187static void
2188slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2189{
2190 frame->prepare = prepare_cede;
2191 frame->check = slf_check_nop;
2192}
2193
2194static void
2195slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2196{
2197 frame->prepare = prepare_cede_notself;
2198 frame->check = slf_check_nop;
2199}
2200
2201/*
2202 * these not obviously related functions are all rolled into one
2203 * function to increase chances that they all will call transfer with the same
2204 * stack offset
2205 * SLF stands for "schedule-like-function".
2206 */
2207static OP *
2208pp_slf (pTHX)
2209{
2210 I32 checkmark; /* mark SP to see how many elements check has pushed */
2211
2212 /* set up the slf frame, unless it has already been set-up */
2213 /* the latter happens when a new coro has been started */
2214 /* or when a new cctx was attached to an existing coroutine */
2215 if (expect_true (!slf_frame.prepare))
2216 {
2217 /* first iteration */
2218 dSP;
2219 SV **arg = PL_stack_base + TOPMARK + 1;
2220 int items = SP - arg; /* args without function object */
2221 SV *gv = *sp;
2222
2223 /* do a quick consistency check on the "function" object, and if it isn't */
2224 /* for us, divert to the real entersub */
2225 if (SvTYPE (gv) != SVt_PVGV
2226 || !GvCV (gv)
2227 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2228 return PL_ppaddr[OP_ENTERSUB](aTHX);
2229
2230 if (!(PL_op->op_flags & OPf_STACKED))
2231 {
2232 /* ampersand-form of call, use @_ instead of stack */
2233 AV *av = GvAV (PL_defgv);
2234 arg = AvARRAY (av);
2235 items = AvFILLp (av) + 1;
2236 }
2237
2238 /* now call the init function, which needs to set up slf_frame */
2239 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2240 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2241
2242 /* pop args */
2243 SP = PL_stack_base + POPMARK;
2244
2245 PUTBACK;
2246 }
2247
2248 /* now that we have a slf_frame, interpret it! */
2249 /* we use a callback system not to make the code needlessly */
2250 /* complicated, but so we can run multiple perl coros from one cctx */
2251
2252 do
2253 {
2254 struct coro_transfer_args ta;
2255
2256 slf_frame.prepare (aTHX_ &ta);
2257 TRANSFER (ta, 0);
2258
2259 checkmark = PL_stack_sp - PL_stack_base;
2260 }
2261 while (slf_frame.check (aTHX_ &slf_frame));
2262
2263 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2264
2265 /* exception handling */
2266 if (expect_false (CORO_THROW))
2267 {
2268 SV *exception = sv_2mortal (CORO_THROW);
2269
2270 CORO_THROW = 0;
2271 sv_setsv (ERRSV, exception);
2272 croak (0);
2273 }
2274
2275 /* return value handling - mostly like entersub */
2276 /* make sure we put something on the stack in scalar context */
2277 if (GIMME_V == G_SCALAR)
2278 {
2279 dSP;
2280 SV **bot = PL_stack_base + checkmark;
2281
2282 if (sp == bot) /* too few, push undef */
2283 bot [1] = &PL_sv_undef;
2284 else if (sp != bot + 1) /* too many, take last one */
2285 bot [1] = *sp;
2286
2287 SP = bot + 1;
2288
2289 PUTBACK;
2290 }
2291
2292 return NORMAL;
2293}
2294
2295static void
2296api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2297{
2298 int i;
2299 SV **arg = PL_stack_base + ax;
2300 int items = PL_stack_sp - arg + 1;
2301
2302 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2303
2304 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2305 && PL_op->op_ppaddr != pp_slf)
2306 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2307
2308 CvFLAGS (cv) |= CVf_SLF;
2309 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2310 slf_cv = cv;
2311
2312 /* we patch the op, and then re-run the whole call */
2313 /* we have to put the same argument on the stack for this to work */
2314 /* and this will be done by pp_restore */
2315 slf_restore.op_next = (OP *)&slf_restore;
2316 slf_restore.op_type = OP_CUSTOM;
2317 slf_restore.op_ppaddr = pp_restore;
2318 slf_restore.op_first = PL_op;
2319
2320 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2321
2322 if (PL_op->op_flags & OPf_STACKED)
2323 {
2324 if (items > slf_arga)
2325 {
2326 slf_arga = items;
2327 free (slf_argv);
2328 slf_argv = malloc (slf_arga * sizeof (SV *));
2329 }
2330
2331 slf_argc = items;
2332
2333 for (i = 0; i < items; ++i)
2334 slf_argv [i] = SvREFCNT_inc (arg [i]);
2335 }
2336 else
2337 slf_argc = 0;
2338
2339 PL_op->op_ppaddr = pp_slf;
2340 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2341
2342 PL_op = (OP *)&slf_restore;
2343}
2344
2345/*****************************************************************************/
2346/* dynamic wind */
2347
2348static void
2349on_enterleave_call (pTHX_ SV *cb)
2350{
2351 dSP;
2352
2353 PUSHSTACK;
2354
2355 PUSHMARK (SP);
2356 PUTBACK;
2357 call_sv (cb, G_VOID | G_DISCARD);
2358 SPAGAIN;
2359
2360 POPSTACK;
2361}
2362
2363static SV *
2364coro_avp_pop_and_free (pTHX_ AV **avp)
2365{
2366 AV *av = *avp;
2367 SV *res = av_pop (av);
2368
2369 if (AvFILLp (av) < 0)
2370 {
2371 *avp = 0;
2372 SvREFCNT_dec (av);
2373 }
2374
2375 return res;
2376}
2377
2378static void
2379coro_pop_on_enter (pTHX_ void *coro)
2380{
2381 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2382 SvREFCNT_dec (cb);
2383}
2384
2385static void
2386coro_pop_on_leave (pTHX_ void *coro)
2387{
2388 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2389 on_enterleave_call (aTHX_ sv_2mortal (cb));
2390}
2391
2392/*****************************************************************************/
2393/* PerlIO::cede */
2394
2395typedef struct
2396{
2397 PerlIOBuf base;
2398 NV next, every;
2399} PerlIOCede;
2400
2401static IV
2402PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2403{
2404 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2405
2406 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2407 self->next = nvtime () + self->every;
2408
2409 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2410}
2411
2412static SV *
2413PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2414{
2415 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2416
2417 return newSVnv (self->every);
2418}
2419
2420static IV
2421PerlIOCede_flush (pTHX_ PerlIO *f)
2422{
2423 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2424 double now = nvtime ();
2425
2426 if (now >= self->next)
2427 {
2428 api_cede (aTHX);
2429 self->next = now + self->every;
2430 }
2431
2432 return PerlIOBuf_flush (aTHX_ f);
2433}
2434
2435static PerlIO_funcs PerlIO_cede =
2436{
2437 sizeof(PerlIO_funcs),
2438 "cede",
2439 sizeof(PerlIOCede),
2440 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2441 PerlIOCede_pushed,
2442 PerlIOBuf_popped,
2443 PerlIOBuf_open,
2444 PerlIOBase_binmode,
2445 PerlIOCede_getarg,
2446 PerlIOBase_fileno,
2447 PerlIOBuf_dup,
2448 PerlIOBuf_read,
2449 PerlIOBuf_unread,
2450 PerlIOBuf_write,
2451 PerlIOBuf_seek,
2452 PerlIOBuf_tell,
2453 PerlIOBuf_close,
2454 PerlIOCede_flush,
2455 PerlIOBuf_fill,
2456 PerlIOBase_eof,
2457 PerlIOBase_error,
2458 PerlIOBase_clearerr,
2459 PerlIOBase_setlinebuf,
2460 PerlIOBuf_get_base,
2461 PerlIOBuf_bufsiz,
2462 PerlIOBuf_get_ptr,
2463 PerlIOBuf_get_cnt,
2464 PerlIOBuf_set_ptrcnt,
2465};
2466
2467/*****************************************************************************/
2468/* Coro::Semaphore & Coro::Signal */
2469
2470static SV *
2471coro_waitarray_new (pTHX_ int count)
2472{
2473 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2474 AV *av = newAV ();
2475 SV **ary;
2476
2477 /* unfortunately, building manually saves memory */
2478 Newx (ary, 2, SV *);
2479 AvALLOC (av) = ary;
2480#if PERL_VERSION_ATLEAST (5,10,0)
2481 AvARRAY (av) = ary;
2482#else
2483 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2484 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2485 SvPVX ((SV *)av) = (char *)ary;
2486#endif
2487 AvMAX (av) = 1;
2488 AvFILLp (av) = 0;
2489 ary [0] = newSViv (count);
2490
2491 return newRV_noinc ((SV *)av);
2492}
2493
2494/* semaphore */
2495
2496static void
2497coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2498{
2499 SV *count_sv = AvARRAY (av)[0];
2500 IV count = SvIVX (count_sv);
2501
2502 count += adjust;
2503 SvIVX (count_sv) = count;
2504
2505 /* now wake up as many waiters as are expected to lock */
2506 while (count > 0 && AvFILLp (av) > 0)
2507 {
2508 SV *cb;
2509
2510 /* swap first two elements so we can shift a waiter */
2511 AvARRAY (av)[0] = AvARRAY (av)[1];
2512 AvARRAY (av)[1] = count_sv;
2513 cb = av_shift (av);
2514
2515 if (SvOBJECT (cb))
2516 {
2517 api_ready (aTHX_ cb);
2518 --count;
2519 }
2520 else if (SvTYPE (cb) == SVt_PVCV)
1099 { 2521 {
1100 dSP; 2522 dSP;
1101 UNLOCK;
1102
1103 ENTER;
1104 SAVETMPS;
1105
1106 PUSHMARK (SP); 2523 PUSHMARK (SP);
2524 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1107 PUTBACK; 2525 PUTBACK;
1108 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2526 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1109
1110 FREETMPS;
1111 LEAVE;
1112 continue;
1113 } 2527 }
1114 2528
1115 ta->next = SvSTATE (next_sv); 2529 SvREFCNT_dec (cb);
2530 }
2531}
1116 2532
1117 /* cannot transfer to destroyed coros, skip and look for next */ 2533static void
1118 if (ta->next->flags & CF_DESTROYED) 2534coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2535{
2536 /* call $sem->adjust (0) to possibly wake up some other waiters */
2537 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2538}
2539
2540static int
2541slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2542{
2543 AV *av = (AV *)frame->data;
2544 SV *count_sv = AvARRAY (av)[0];
2545
2546 /* if we are about to throw, don't actually acquire the lock, just throw */
2547 if (CORO_THROW)
2548 return 0;
2549 else if (SvIVX (count_sv) > 0)
2550 {
2551 SvSTATE_current->on_destroy = 0;
2552
2553 if (acquire)
2554 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2555 else
2556 coro_semaphore_adjust (aTHX_ av, 0);
2557
2558 return 0;
2559 }
2560 else
2561 {
2562 int i;
2563 /* if we were woken up but can't down, we look through the whole */
2564 /* waiters list and only add us if we aren't in there already */
2565 /* this avoids some degenerate memory usage cases */
2566
2567 for (i = 1; i <= AvFILLp (av); ++i)
2568 if (AvARRAY (av)[i] == SvRV (coro_current))
2569 return 1;
2570
2571 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2572 return 1;
2573 }
2574}
2575
2576static int
2577slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2578{
2579 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2580}
2581
2582static int
2583slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2584{
2585 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2586}
2587
2588static void
2589slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2590{
2591 AV *av = (AV *)SvRV (arg [0]);
2592
2593 if (SvIVX (AvARRAY (av)[0]) > 0)
2594 {
2595 frame->data = (void *)av;
2596 frame->prepare = prepare_nop;
2597 }
2598 else
2599 {
2600 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2601
2602 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2603 frame->prepare = prepare_schedule;
2604
2605 /* to avoid race conditions when a woken-up coro gets terminated */
2606 /* we arrange for a temporary on_destroy that calls adjust (0) */
2607 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2608 }
2609}
2610
2611static void
2612slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2615 frame->check = slf_check_semaphore_down;
2616}
2617
2618static void
2619slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2620{
2621 if (items >= 2)
2622 {
2623 /* callback form */
2624 AV *av = (AV *)SvRV (arg [0]);
2625 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2626
2627 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2628
2629 if (SvIVX (AvARRAY (av)[0]) > 0)
2630 coro_semaphore_adjust (aTHX_ av, 0);
2631
2632 frame->prepare = prepare_nop;
2633 frame->check = slf_check_nop;
2634 }
2635 else
2636 {
2637 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2638 frame->check = slf_check_semaphore_wait;
2639 }
2640}
2641
2642/* signal */
2643
2644static void
2645coro_signal_wake (pTHX_ AV *av, int count)
2646{
2647 SvIVX (AvARRAY (av)[0]) = 0;
2648
2649 /* now signal count waiters */
2650 while (count > 0 && AvFILLp (av) > 0)
2651 {
2652 SV *cb;
2653
2654 /* swap first two elements so we can shift a waiter */
2655 cb = AvARRAY (av)[0];
2656 AvARRAY (av)[0] = AvARRAY (av)[1];
2657 AvARRAY (av)[1] = cb;
2658
2659 cb = av_shift (av);
2660
2661 api_ready (aTHX_ cb);
2662 sv_setiv (cb, 0); /* signal waiter */
2663 SvREFCNT_dec (cb);
2664
2665 --count;
2666 }
2667}
2668
2669static int
2670slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2671{
2672 /* if we are about to throw, also stop waiting */
2673 return SvROK ((SV *)frame->data) && !CORO_THROW;
2674}
2675
2676static void
2677slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2678{
2679 AV *av = (AV *)SvRV (arg [0]);
2680
2681 if (SvIVX (AvARRAY (av)[0]))
2682 {
2683 SvIVX (AvARRAY (av)[0]) = 0;
2684 frame->prepare = prepare_nop;
2685 frame->check = slf_check_nop;
2686 }
2687 else
2688 {
2689 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2690
2691 av_push (av, waiter);
2692
2693 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2694 frame->prepare = prepare_schedule;
2695 frame->check = slf_check_signal_wait;
2696 }
2697}
2698
2699/*****************************************************************************/
2700/* Coro::AIO */
2701
2702#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2703
2704/* helper storage struct */
2705struct io_state
2706{
2707 int errorno;
2708 I32 laststype; /* U16 in 5.10.0 */
2709 int laststatval;
2710 Stat_t statcache;
2711};
2712
2713static void
2714coro_aio_callback (pTHX_ CV *cv)
2715{
2716 dXSARGS;
2717 AV *state = (AV *)GENSUB_ARG;
2718 SV *coro = av_pop (state);
2719 SV *data_sv = newSV (sizeof (struct io_state));
2720
2721 av_extend (state, items - 1);
2722
2723 sv_upgrade (data_sv, SVt_PV);
2724 SvCUR_set (data_sv, sizeof (struct io_state));
2725 SvPOK_only (data_sv);
2726
2727 {
2728 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2729
2730 data->errorno = errno;
2731 data->laststype = PL_laststype;
2732 data->laststatval = PL_laststatval;
2733 data->statcache = PL_statcache;
2734 }
2735
2736 /* now build the result vector out of all the parameters and the data_sv */
2737 {
2738 int i;
2739
2740 for (i = 0; i < items; ++i)
2741 av_push (state, SvREFCNT_inc_NN (ST (i)));
2742 }
2743
2744 av_push (state, data_sv);
2745
2746 api_ready (aTHX_ coro);
2747 SvREFCNT_dec (coro);
2748 SvREFCNT_dec ((AV *)state);
2749}
2750
2751static int
2752slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2753{
2754 AV *state = (AV *)frame->data;
2755
2756 /* if we are about to throw, return early */
2757 /* this does not cancel the aio request, but at least */
2758 /* it quickly returns */
2759 if (CORO_THROW)
2760 return 0;
2761
2762 /* one element that is an RV? repeat! */
2763 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2764 return 1;
2765
2766 /* restore status */
2767 {
2768 SV *data_sv = av_pop (state);
2769 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2770
2771 errno = data->errorno;
2772 PL_laststype = data->laststype;
2773 PL_laststatval = data->laststatval;
2774 PL_statcache = data->statcache;
2775
2776 SvREFCNT_dec (data_sv);
2777 }
2778
2779 /* push result values */
2780 {
2781 dSP;
2782 int i;
2783
2784 EXTEND (SP, AvFILLp (state) + 1);
2785 for (i = 0; i <= AvFILLp (state); ++i)
2786 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2787
2788 PUTBACK;
2789 }
2790
2791 return 0;
2792}
2793
2794static void
2795slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2796{
2797 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2798 SV *coro_hv = SvRV (coro_current);
2799 struct coro *coro = SvSTATE_hv (coro_hv);
2800
2801 /* put our coroutine id on the state arg */
2802 av_push (state, SvREFCNT_inc_NN (coro_hv));
2803
2804 /* first see whether we have a non-zero priority and set it as AIO prio */
2805 if (coro->prio)
2806 {
2807 dSP;
2808
2809 static SV *prio_cv;
2810 static SV *prio_sv;
2811
2812 if (expect_false (!prio_cv))
1119 { 2813 {
1120 UNLOCK; 2814 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1121 SvREFCNT_dec (next_sv); 2815 prio_sv = newSViv (0);
1122 /* coro_nready is already taken care of by destroy */
1123 continue;
1124 } 2816 }
1125 2817
1126 --coro_nready; 2818 PUSHMARK (SP);
1127 UNLOCK; 2819 sv_setiv (prio_sv, coro->prio);
1128 break; 2820 XPUSHs (prio_sv);
1129 }
1130 2821
1131 /* free this only after the transfer */ 2822 PUTBACK;
1132 prev_sv = SvRV (coro_current); 2823 call_sv (prio_cv, G_VOID | G_DISCARD);
1133 SvRV_set (coro_current, next_sv);
1134 ta->prev = SvSTATE (prev_sv);
1135
1136 assert (ta->next->flags & CF_READY);
1137 ta->next->flags &= ~CF_READY;
1138
1139 LOCK;
1140 free_coro_mortal (aTHX);
1141 coro_mortal = prev_sv;
1142 UNLOCK;
1143}
1144
1145static void
1146prepare_cede (pTHX_ struct transfer_args *ta)
1147{
1148 api_ready (coro_current);
1149 prepare_schedule (aTHX_ ta);
1150}
1151
1152static int
1153prepare_cede_notself (pTHX_ struct transfer_args *ta)
1154{
1155 if (coro_nready)
1156 { 2824 }
1157 SV *prev = SvRV (coro_current); 2825
1158 prepare_schedule (aTHX_ ta); 2826 /* now call the original request */
1159 api_ready (prev); 2827 {
1160 return 1; 2828 dSP;
2829 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2830 int i;
2831
2832 PUSHMARK (SP);
2833
2834 /* first push all args to the stack */
2835 EXTEND (SP, items + 1);
2836
2837 for (i = 0; i < items; ++i)
2838 PUSHs (arg [i]);
2839
2840 /* now push the callback closure */
2841 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2842
2843 /* now call the AIO function - we assume our request is uncancelable */
2844 PUTBACK;
2845 call_sv ((SV *)req, G_VOID | G_DISCARD);
1161 } 2846 }
1162 else
1163 return 0;
1164}
1165 2847
1166static void 2848 /* now that the requets is going, we loop toll we have a result */
1167api_schedule (void) 2849 frame->data = (void *)state;
1168{ 2850 frame->prepare = prepare_schedule;
1169 dTHX; 2851 frame->check = slf_check_aio_req;
1170 struct transfer_args ta;
1171
1172 prepare_schedule (aTHX_ &ta);
1173 TRANSFER (ta);
1174} 2852}
1175 2853
1176static int 2854static void
1177api_cede (void) 2855coro_aio_req_xs (pTHX_ CV *cv)
1178{ 2856{
1179 dTHX; 2857 dXSARGS;
1180 struct transfer_args ta;
1181 2858
1182 prepare_cede (aTHX_ &ta); 2859 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1183 2860
1184 if (ta.prev != ta.next) 2861 XSRETURN_EMPTY;
1185 {
1186 TRANSFER (ta);
1187 return 1;
1188 }
1189 else
1190 return 0;
1191} 2862}
1192 2863
1193static int 2864/*****************************************************************************/
1194api_cede_notself (void)
1195{
1196 dTHX;
1197 struct transfer_args ta;
1198 2865
1199 if (prepare_cede_notself (aTHX_ &ta)) 2866#if CORO_CLONE
1200 { 2867# include "clone.c"
1201 TRANSFER (ta); 2868#endif
1202 return 1;
1203 }
1204 else
1205 return 0;
1206}
1207 2869
1208MODULE = Coro::State PACKAGE = Coro::State 2870MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1209 2871
1210PROTOTYPES: DISABLE 2872PROTOTYPES: DISABLE
1211 2873
1212BOOT: 2874BOOT:
1213{ 2875{
1214#ifdef USE_ITHREADS 2876#ifdef USE_ITHREADS
1215 MUTEX_INIT (&coro_mutex); 2877# if CORO_PTHREAD
2878 coro_thx = PERL_GET_CONTEXT;
2879# endif
1216#endif 2880#endif
1217 BOOT_PAGESIZE; 2881 BOOT_PAGESIZE;
1218 2882
2883 cctx_current = cctx_new_empty ();
2884
2885 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2886 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2887
2888 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2889 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2890 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2891
2892 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2893 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2894 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2895
1219 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2896 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1220 2897
1221 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2898 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1222 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2899 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1223 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1224 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1225 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1226 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2900 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1227 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2901 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1228 2902
1229 main_mainstack = PL_mainstack; 2903 main_mainstack = PL_mainstack;
1230 main_top_env = PL_top_env; 2904 main_top_env = PL_top_env;
1231 2905
1232 while (main_top_env->je_prev) 2906 while (main_top_env->je_prev)
1233 main_top_env = main_top_env->je_prev; 2907 main_top_env = main_top_env->je_prev;
1234 2908
2909 {
2910 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2911
2912 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2913 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2914
2915 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2916 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2917 }
2918
1235 coroapi.ver = CORO_API_VERSION; 2919 coroapi.ver = CORO_API_VERSION;
2920 coroapi.rev = CORO_API_REVISION;
2921
1236 coroapi.transfer = api_transfer; 2922 coroapi.transfer = api_transfer;
2923
2924 coroapi.sv_state = SvSTATE_;
2925 coroapi.execute_slf = api_execute_slf;
2926 coroapi.prepare_nop = prepare_nop;
2927 coroapi.prepare_schedule = prepare_schedule;
2928 coroapi.prepare_cede = prepare_cede;
2929 coroapi.prepare_cede_notself = prepare_cede_notself;
2930
2931 {
2932 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2933
2934 if (!svp) croak ("Time::HiRes is required");
2935 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2936
2937 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2938 }
1237 2939
1238 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2940 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1239} 2941}
1240 2942
1241SV * 2943SV *
1242new (char *klass, ...) 2944new (char *klass, ...)
2945 ALIAS:
2946 Coro::new = 1
1243 CODE: 2947 CODE:
1244{ 2948{
1245 struct coro *coro; 2949 struct coro *coro;
2950 MAGIC *mg;
1246 HV *hv; 2951 HV *hv;
2952 CV *cb;
1247 int i; 2953 int i;
1248 2954
2955 if (items > 1)
2956 {
2957 cb = coro_sv_2cv (aTHX_ ST (1));
2958
2959 if (!ix)
2960 {
2961 if (CvISXSUB (cb))
2962 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2963
2964 if (!CvROOT (cb))
2965 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2966 }
2967 }
2968
1249 Newz (0, coro, 1, struct coro); 2969 Newz (0, coro, 1, struct coro);
1250 coro->args = newAV (); 2970 coro->args = newAV ();
1251 coro->save = CORO_SAVE_DEF;
1252 coro->flags = CF_NEW; 2971 coro->flags = CF_NEW;
1253 2972
1254 if (coro_first) coro_first->prev = coro; 2973 if (coro_first) coro_first->prev = coro;
1255 coro->next = coro_first; 2974 coro->next = coro_first;
1256 coro_first = coro; 2975 coro_first = coro;
1257 2976
1258 coro->hv = hv = newHV (); 2977 coro->hv = hv = newHV ();
1259 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2978 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2979 mg->mg_flags |= MGf_DUP;
1260 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2980 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1261 2981
2982 if (items > 1)
2983 {
2984 av_extend (coro->args, items - 1 + ix - 1);
2985
2986 if (ix)
2987 {
2988 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2989 cb = cv_coro_run;
2990 }
2991
2992 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2993
1262 for (i = 1; i < items; i++) 2994 for (i = 2; i < items; i++)
1263 av_push (coro->args, newSVsv (ST (i))); 2995 av_push (coro->args, newSVsv (ST (i)));
2996 }
1264} 2997}
1265 OUTPUT: 2998 OUTPUT:
1266 RETVAL 2999 RETVAL
1267 3000
1268int 3001void
1269save (SV *coro, int new_save = -1) 3002transfer (...)
3003 PROTOTYPE: $$
1270 CODE: 3004 CODE:
1271 RETVAL = api_save (coro, new_save); 3005 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1272 OUTPUT:
1273 RETVAL
1274
1275int
1276save_also (SV *coro_sv, int save_also)
1277 CODE:
1278{
1279 struct coro *coro = SvSTATE (coro_sv);
1280 RETVAL = coro->save;
1281 coro->save |= save_also;
1282}
1283 OUTPUT:
1284 RETVAL
1285
1286void
1287_set_stacklevel (...)
1288 ALIAS:
1289 Coro::State::transfer = 1
1290 Coro::schedule = 2
1291 Coro::cede = 3
1292 Coro::cede_notself = 4
1293 CODE:
1294{
1295 struct transfer_args ta;
1296
1297 switch (ix)
1298 {
1299 case 0:
1300 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1301 ta.next = 0;
1302 break;
1303
1304 case 1:
1305 if (items != 2)
1306 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1307
1308 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1309 break;
1310
1311 case 2:
1312 prepare_schedule (aTHX_ &ta);
1313 break;
1314
1315 case 3:
1316 prepare_cede (aTHX_ &ta);
1317 break;
1318
1319 case 4:
1320 if (!prepare_cede_notself (aTHX_ &ta))
1321 XSRETURN_EMPTY;
1322
1323 break;
1324 }
1325
1326 BARRIER;
1327 TRANSFER (ta);
1328
1329 if (GIMME_V != G_VOID && ta.next != ta.prev)
1330 XSRETURN_YES;
1331}
1332 3006
1333bool 3007bool
1334_destroy (SV *coro_sv) 3008_destroy (SV *coro_sv)
1335 CODE: 3009 CODE:
1336 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3010 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1337 OUTPUT: 3011 OUTPUT:
1338 RETVAL 3012 RETVAL
1339 3013
1340void 3014void
1341_exit (code) 3015_exit (int code)
1342 int code
1343 PROTOTYPE: $ 3016 PROTOTYPE: $
1344 CODE: 3017 CODE:
1345 _exit (code); 3018 _exit (code);
1346 3019
3020SV *
3021clone (Coro::State coro)
3022 CODE:
3023{
3024#if CORO_CLONE
3025 struct coro *ncoro = coro_clone (aTHX_ coro);
3026 MAGIC *mg;
3027 /* TODO: too much duplication */
3028 ncoro->hv = newHV ();
3029 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3030 mg->mg_flags |= MGf_DUP;
3031 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3032#else
3033 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3034#endif
3035}
3036 OUTPUT:
3037 RETVAL
3038
1347int 3039int
1348cctx_stacksize (int new_stacksize = 0) 3040cctx_stacksize (int new_stacksize = 0)
3041 PROTOTYPE: ;$
1349 CODE: 3042 CODE:
1350 RETVAL = coro_stacksize; 3043 RETVAL = cctx_stacksize;
1351 if (new_stacksize) 3044 if (new_stacksize)
3045 {
1352 coro_stacksize = new_stacksize; 3046 cctx_stacksize = new_stacksize;
3047 ++cctx_gen;
3048 }
1353 OUTPUT: 3049 OUTPUT:
1354 RETVAL 3050 RETVAL
1355 3051
1356int 3052int
3053cctx_max_idle (int max_idle = 0)
3054 PROTOTYPE: ;$
3055 CODE:
3056 RETVAL = cctx_max_idle;
3057 if (max_idle > 1)
3058 cctx_max_idle = max_idle;
3059 OUTPUT:
3060 RETVAL
3061
3062int
1357cctx_count () 3063cctx_count ()
3064 PROTOTYPE:
1358 CODE: 3065 CODE:
1359 RETVAL = cctx_count; 3066 RETVAL = cctx_count;
1360 OUTPUT: 3067 OUTPUT:
1361 RETVAL 3068 RETVAL
1362 3069
1363int 3070int
1364cctx_idle () 3071cctx_idle ()
3072 PROTOTYPE:
1365 CODE: 3073 CODE:
1366 RETVAL = cctx_idle; 3074 RETVAL = cctx_idle;
1367 OUTPUT: 3075 OUTPUT:
1368 RETVAL 3076 RETVAL
1369 3077
1370void 3078void
1371list () 3079list ()
3080 PROTOTYPE:
1372 PPCODE: 3081 PPCODE:
1373{ 3082{
1374 struct coro *coro; 3083 struct coro *coro;
1375 for (coro = coro_first; coro; coro = coro->next) 3084 for (coro = coro_first; coro; coro = coro->next)
1376 if (coro->hv) 3085 if (coro->hv)
1377 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv))); 3086 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1378} 3087}
1379 3088
1380void 3089void
1381_eval (Coro::State coro, SV *coderef) 3090call (Coro::State coro, SV *coderef)
3091 ALIAS:
3092 eval = 1
1382 CODE: 3093 CODE:
1383{ 3094{
1384 if (coro->mainstack) 3095 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1385 { 3096 {
1386 struct coro temp; 3097 struct coro *current = SvSTATE_current;
1387 Zero (&temp, 1, struct coro);
1388 temp.save = CORO_SAVE_ALL;
1389 3098
1390 if (!(coro->flags & CF_RUNNING)) 3099 if (current != coro)
1391 { 3100 {
3101 PUTBACK;
1392 save_perl (aTHX_ &temp); 3102 save_perl (aTHX_ current);
1393 load_perl (aTHX_ coro); 3103 load_perl (aTHX_ coro);
3104 SPAGAIN;
1394 } 3105 }
1395 3106
1396 { 3107 PUSHSTACK;
1397 dSP; 3108
1398 ENTER;
1399 SAVETMPS;
1400 PUSHMARK (SP); 3109 PUSHMARK (SP);
1401 PUTBACK; 3110 PUTBACK;
3111
3112 if (ix)
3113 eval_sv (coderef, 0);
3114 else
1402 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3115 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3116
3117 POPSTACK;
1403 SPAGAIN; 3118 SPAGAIN;
1404 FREETMPS;
1405 LEAVE;
1406 PUTBACK;
1407 }
1408 3119
1409 if (!(coro->flags & CF_RUNNING)) 3120 if (current != coro)
1410 { 3121 {
3122 PUTBACK;
1411 save_perl (aTHX_ coro); 3123 save_perl (aTHX_ coro);
1412 load_perl (aTHX_ &temp); 3124 load_perl (aTHX_ current);
3125 SPAGAIN;
1413 } 3126 }
1414 } 3127 }
1415} 3128}
1416 3129
1417SV * 3130SV *
1418is_ready (Coro::State coro) 3131is_ready (Coro::State coro)
1419 PROTOTYPE: $ 3132 PROTOTYPE: $
1420 ALIAS: 3133 ALIAS:
1421 is_ready = CF_READY 3134 is_ready = CF_READY
1422 is_running = CF_RUNNING 3135 is_running = CF_RUNNING
1423 is_new = CF_NEW 3136 is_new = CF_NEW
1424 is_destroyed = CF_DESTROYED 3137 is_destroyed = CF_DESTROYED
3138 is_suspended = CF_SUSPENDED
1425 CODE: 3139 CODE:
1426 RETVAL = boolSV (coro->flags & ix); 3140 RETVAL = boolSV (coro->flags & ix);
1427 OUTPUT: 3141 OUTPUT:
1428 RETVAL 3142 RETVAL
1429 3143
1430IV 3144void
3145throw (Coro::State self, SV *throw = &PL_sv_undef)
3146 PROTOTYPE: $;$
3147 CODE:
3148{
3149 struct coro *current = SvSTATE_current;
3150 SV **throwp = self == current ? &CORO_THROW : &self->except;
3151 SvREFCNT_dec (*throwp);
3152 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3153}
3154
3155void
3156api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3157 PROTOTYPE: $;$
3158 C_ARGS: aTHX_ coro, flags
3159
3160SV *
3161has_cctx (Coro::State coro)
3162 PROTOTYPE: $
3163 CODE:
3164 /* maybe manage the running flag differently */
3165 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3166 OUTPUT:
3167 RETVAL
3168
3169int
3170is_traced (Coro::State coro)
3171 PROTOTYPE: $
3172 CODE:
3173 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3174 OUTPUT:
3175 RETVAL
3176
3177UV
1431rss (Coro::State coro) 3178rss (Coro::State coro)
1432 PROTOTYPE: $ 3179 PROTOTYPE: $
3180 ALIAS:
3181 usecount = 1
1433 CODE: 3182 CODE:
1434 RETVAL = coro_rss (coro); 3183 switch (ix)
3184 {
3185 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3186 case 1: RETVAL = coro->usecount; break;
3187 }
1435 OUTPUT: 3188 OUTPUT:
1436 RETVAL 3189 RETVAL
1437 3190
3191void
3192force_cctx ()
3193 PROTOTYPE:
3194 CODE:
3195 cctx_current->idle_sp = 0;
3196
3197void
3198swap_defsv (Coro::State self)
3199 PROTOTYPE: $
3200 ALIAS:
3201 swap_defav = 1
3202 CODE:
3203 if (!self->slot)
3204 croak ("cannot swap state with coroutine that has no saved state,");
3205 else
3206 {
3207 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3208 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3209
3210 SV *tmp = *src; *src = *dst; *dst = tmp;
3211 }
3212
3213void
3214cancel (Coro::State self)
3215 CODE:
3216 coro_state_destroy (aTHX_ self);
3217 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3218
1438 3219
1439MODULE = Coro::State PACKAGE = Coro 3220MODULE = Coro::State PACKAGE = Coro
1440 3221
1441BOOT: 3222BOOT:
1442{ 3223{
1443 int i; 3224 int i;
1444 3225
3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3235
3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3240
1445 coro_stash = gv_stashpv ("Coro", TRUE); 3241 coro_stash = gv_stashpv ("Coro", TRUE);
1446 3242
1447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1448 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1449 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1450 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1451 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1452 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1453 3249
1454 coro_current = get_sv ("Coro::current", FALSE);
1455 SvREADONLY_on (coro_current);
1456
1457 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1458 coro_ready[i] = newAV ();
1459
1460 { 3250 {
1461 SV *sv = perl_get_sv("Coro::API", 1); 3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1462 3252
1463 coroapi.schedule = api_schedule; 3253 coroapi.schedule = api_schedule;
1464 coroapi.save = api_save; 3254 coroapi.schedule_to = api_schedule_to;
1465 coroapi.cede = api_cede; 3255 coroapi.cede = api_cede;
1466 coroapi.cede_notself = api_cede_notself; 3256 coroapi.cede_notself = api_cede_notself;
1467 coroapi.ready = api_ready; 3257 coroapi.ready = api_ready;
1468 coroapi.is_ready = api_is_ready; 3258 coroapi.is_ready = api_is_ready;
1469 coroapi.nready = &coro_nready; 3259 coroapi.nready = coro_nready;
1470 coroapi.current = coro_current; 3260 coroapi.current = coro_current;
1471 3261
1472 GCoroAPI = &coroapi; 3262 /*GCoroAPI = &coroapi;*/
1473 sv_setiv (sv, (IV)&coroapi); 3263 sv_setiv (sv, (IV)&coroapi);
1474 SvREADONLY_on (sv); 3264 SvREADONLY_on (sv);
1475 } 3265 }
1476} 3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1477 3297
1478void 3298void
1479_set_current (SV *current) 3299_set_current (SV *current)
1480 PROTOTYPE: $ 3300 PROTOTYPE: $
1481 CODE: 3301 CODE:
1482 SvREFCNT_dec (SvRV (coro_current)); 3302 SvREFCNT_dec (SvRV (coro_current));
1483 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3304
3305void
3306_set_readyhook (SV *hook)
3307 PROTOTYPE: $
3308 CODE:
3309 SvREFCNT_dec (coro_readyhook);
3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1484 3311
1485int 3312int
1486prio (Coro::State coro, int newprio = 0) 3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
1487 ALIAS: 3315 ALIAS:
1488 nice = 1 3316 nice = 1
1489 CODE: 3317 CODE:
1490{ 3318{
1491 RETVAL = coro->prio; 3319 RETVAL = coro->prio;
… …
1506 3334
1507SV * 3335SV *
1508ready (SV *self) 3336ready (SV *self)
1509 PROTOTYPE: $ 3337 PROTOTYPE: $
1510 CODE: 3338 CODE:
1511 RETVAL = boolSV (api_ready (self)); 3339 RETVAL = boolSV (api_ready (aTHX_ self));
1512 OUTPUT: 3340 OUTPUT:
1513 RETVAL 3341 RETVAL
1514 3342
1515int 3343int
1516nready (...) 3344nready (...)
… …
1518 CODE: 3346 CODE:
1519 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1520 OUTPUT: 3348 OUTPUT:
1521 RETVAL 3349 RETVAL
1522 3350
1523MODULE = Coro::State PACKAGE = Coro::AIO 3351void
3352suspend (Coro::State self)
3353 PROTOTYPE: $
3354 CODE:
3355 self->flags |= CF_SUSPENDED;
3356
3357void
3358resume (Coro::State self)
3359 PROTOTYPE: $
3360 CODE:
3361 self->flags &= ~CF_SUSPENDED;
3362
3363void
3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3367
3368void
3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
3377
3378 av_extend (av, items - 2);
3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
3381
3382 if ((SV *)hv == &PL_sv_undef)
3383 {
3384 PUSHMARK (SP);
3385 EXTEND (SP, 2);
3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3393 }
3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
3409 SvREFCNT_dec (hv);
3410}
1524 3411
1525SV * 3412SV *
1526_get_state () 3413rouse_cb ()
3414 PROTOTYPE:
1527 CODE: 3415 CODE:
1528{ 3416 RETVAL = coro_new_rouse_cb (aTHX);
1529 struct io_state *data;
1530
1531 RETVAL = newSV (sizeof (struct io_state));
1532 data = (struct io_state *)SvPVX (RETVAL);
1533 SvCUR_set (RETVAL, sizeof (struct io_state));
1534 SvPOK_only (RETVAL);
1535
1536 data->errorno = errno;
1537 data->laststype = PL_laststype;
1538 data->laststatval = PL_laststatval;
1539 data->statcache = PL_statcache;
1540}
1541 OUTPUT: 3417 OUTPUT:
1542 RETVAL 3418 RETVAL
1543 3419
1544void 3420void
1545_set_state (char *data_) 3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
1546 PROTOTYPE: $ 3430 PROTOTYPE: &
1547 CODE: 3431 CODE:
1548{ 3432{
1549 struct io_state *data = (void *)data_; 3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1550 3435
1551 errno = data->errorno; 3436 block = (SV *)coro_sv_2cv (aTHX_ block);
1552 PL_laststype = data->laststype;
1553 PL_laststatval = data->laststatval;
1554 PL_statcache = data->statcache;
1555}
1556 3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
3489 CODE:
3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3491
3492void
3493down (...)
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
3529 else
3530 {
3531 int i;
3532 EXTEND (SP, wcount);
3533 for (i = 1; i <= wcount; ++i)
3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3535 }
3536}
3537
3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
3540void
3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
3558 CODE:
3559 RETVAL = sv_bless (
3560 coro_waitarray_new (aTHX_ 0),
3561 GvSTASH (CvGV (cv))
3562 );
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
3593 CODE:
3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3595 OUTPUT:
3596 RETVAL
3597
3598
3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
3600
3601BOOT:
3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3603
3604void
3605_schedule (...)
3606 CODE:
3607{
3608 static int incede;
3609
3610 api_cede_notself (aTHX);
3611
3612 ++incede;
3613 while (coro_nready >= incede && api_cede (aTHX))
3614 ;
3615
3616 sv_setsv (sv_activity, &PL_sv_undef);
3617 if (coro_nready >= incede)
3618 {
3619 PUSHMARK (SP);
3620 PUTBACK;
3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3622 }
3623
3624 --incede;
3625}
3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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