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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC vs.
Revision 1.339 by root, Mon Dec 15 00:28:30 2008 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 */
174static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
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;
136 199
137static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
138static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
139 202
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
140/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
141typedef struct coro_cctx { 213typedef struct coro_cctx
214{
142 struct coro_cctx *next; 215 struct coro_cctx *next;
143 216
144 /* the stack */ 217 /* the stack */
145 void *sptr; 218 void *sptr;
146 size_t ssize; 219 size_t ssize;
… …
149 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
150 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 */
151 JMPENV *top_env; 224 JMPENV *top_env;
152 coro_context cctx; 225 coro_context cctx;
153 226
227 U32 gen;
154#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
155 int valgrind_id; 229 int valgrind_id;
156#endif 230#endif
157 char inuse, mapped; 231 unsigned char flags;
158} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
159 237
160enum { 238enum {
161 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
162 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
163 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
164 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
165}; 243};
166 244
167/* this is a structure representing a perl-level coroutine */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
168struct coro { 246typedef struct
169 /* the c coroutine allocated to this perl coroutine, if any */ 247{
170 coro_cctx *cctx; 248 SV *defsv;
171 249 AV *defav;
172 /* data associated with this coroutine (initial args) */ 250 SV *errsv;
173 AV *args; 251 SV *irsgv;
174 int refcnt; 252 HV *hinthv;
175 int save; /* CORO_SAVE flags */
176 int flags; /* CF_ flags */
177
178 /* optionally saved, might be zero */
179 AV *defav; /* @_ */
180 SV *defsv; /* $_ */
181 SV *errsv; /* $@ */
182 GV *deffh; /* default filehandle */
183 SV *irssv; /* $/ */
184 SV *irssv_sv; /* real $/ cache */
185
186#define VAR(name,type) type name; 253#define VAR(name,type) type name;
187# include "state.h" 254# include "state.h"
188#undef VAR 255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
261struct coro {
262 /* the C coroutine allocated to this perl coroutine, if any */
263 coro_cctx *cctx;
264
265 /* state data */
266 struct CoroSLF slf_frame; /* saved slf frame */
267 AV *mainstack;
268 perl_slots *slot; /* basically the saved sp */
269
270 CV *startcv; /* the CV to execute */
271 AV *args; /* data associated with this coroutine (initial args) */
272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
189 279
190 /* coro process data */ 280 /* coro process data */
191 int prio; 281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* on_enter/on_leave */
291 AV *on_enter;
292 AV *on_leave;
293
294 /* linked list */
295 struct coro *next, *prev;
192}; 296};
193 297
194typedef struct coro *Coro__State; 298typedef struct coro *Coro__State;
195typedef struct coro *Coro__State_or_hashref; 299typedef struct coro *Coro__State_or_hashref;
300
301/* the following variables are effectively part of the perl context */
302/* and get copied between struct coro and these variables */
303/* the mainr easonw e don't support windows process emulation */
304static struct CoroSLF slf_frame; /* the current slf frame */
196 305
197/** Coro ********************************************************************/ 306/** Coro ********************************************************************/
198 307
199#define PRIO_MAX 3 308#define PRIO_MAX 3
200#define PRIO_HIGH 1 309#define PRIO_HIGH 1
… …
203#define PRIO_IDLE -3 312#define PRIO_IDLE -3
204#define PRIO_MIN -4 313#define PRIO_MIN -4
205 314
206/* for Coro.pm */ 315/* for Coro.pm */
207static SV *coro_current; 316static SV *coro_current;
317static SV *coro_readyhook;
208static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 318static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
209static int coro_nready; 319static CV *cv_coro_run, *cv_coro_terminate;
320static struct coro *coro_first;
321#define coro_nready coroapi.nready
210 322
211/** lowlevel stuff **********************************************************/ 323/** lowlevel stuff **********************************************************/
212 324
325static SV *
326coro_get_sv (pTHX_ const char *name, int create)
327{
328#if PERL_VERSION_ATLEAST (5,10,0)
329 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
330 get_sv (name, create);
331#endif
332 return get_sv (name, create);
333}
334
213static AV * 335static AV *
336coro_get_av (pTHX_ const char *name, int create)
337{
338#if PERL_VERSION_ATLEAST (5,10,0)
339 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
340 get_av (name, create);
341#endif
342 return get_av (name, create);
343}
344
345static HV *
346coro_get_hv (pTHX_ const char *name, int create)
347{
348#if PERL_VERSION_ATLEAST (5,10,0)
349 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
350 get_hv (name, create);
351#endif
352 return get_hv (name, create);
353}
354
355/* may croak */
356INLINE CV *
357coro_sv_2cv (pTHX_ SV *sv)
358{
359 HV *st;
360 GV *gvp;
361 CV *cv = sv_2cv (sv, &st, &gvp, 0);
362
363 if (!cv)
364 croak ("code reference expected");
365
366 return cv;
367}
368
369/*****************************************************************************/
370/* magic glue */
371
372#define CORO_MAGIC_type_cv 26
373#define CORO_MAGIC_type_state PERL_MAGIC_ext
374
375#define CORO_MAGIC_NN(sv, type) \
376 (expect_true (SvMAGIC (sv)->mg_type == type) \
377 ? SvMAGIC (sv) \
378 : mg_find (sv, type))
379
380#define CORO_MAGIC(sv, type) \
381 (expect_true (SvMAGIC (sv)) \
382 ? CORO_MAGIC_NN (sv, type) \
383 : 0)
384
385#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
386#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
387
388INLINE struct coro *
389SvSTATE_ (pTHX_ SV *coro)
390{
391 HV *stash;
392 MAGIC *mg;
393
394 if (SvROK (coro))
395 coro = SvRV (coro);
396
397 if (expect_false (SvTYPE (coro) != SVt_PVHV))
398 croak ("Coro::State object required");
399
400 stash = SvSTASH (coro);
401 if (expect_false (stash != coro_stash && stash != coro_state_stash))
402 {
403 /* very slow, but rare, check */
404 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
405 croak ("Coro::State object required");
406 }
407
408 mg = CORO_MAGIC_state (coro);
409 return (struct coro *)mg->mg_ptr;
410}
411
412#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
413
414/* faster than SvSTATE, but expects a coroutine hv */
415#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
416#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
417
418/*****************************************************************************/
419/* padlist management and caching */
420
421static AV *
214coro_clone_padlist (pTHX_ CV *cv) 422coro_derive_padlist (pTHX_ CV *cv)
215{ 423{
216 AV *padlist = CvPADLIST (cv); 424 AV *padlist = CvPADLIST (cv);
217 AV *newpadlist, *newpad; 425 AV *newpadlist, *newpad;
218 426
219 newpadlist = newAV (); 427 newpadlist = newAV ();
220 AvREAL_off (newpadlist); 428 AvREAL_off (newpadlist);
221#if PERL_VERSION_ATLEAST (5,9,0) 429#if PERL_VERSION_ATLEAST (5,10,0)
222 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 430 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
223#else 431#else
224 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 432 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
225#endif 433#endif
226 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 434 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
227 --AvFILLp (padlist); 435 --AvFILLp (padlist);
228 436
229 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 437 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
230 av_store (newpadlist, 1, (SV *)newpad); 438 av_store (newpadlist, 1, (SV *)newpad);
231 439
232 return newpadlist; 440 return newpadlist;
233} 441}
234 442
235static void 443static void
236free_padlist (pTHX_ AV *padlist) 444free_padlist (pTHX_ AV *padlist)
237{ 445{
238 /* may be during global destruction */ 446 /* may be during global destruction */
239 if (SvREFCNT (padlist)) 447 if (!IN_DESTRUCT)
240 { 448 {
241 I32 i = AvFILLp (padlist); 449 I32 i = AvFILLp (padlist);
242 while (i >= 0) 450
451 while (i > 0) /* special-case index 0 */
243 { 452 {
244 SV **svp = av_fetch (padlist, i--, FALSE); 453 /* we try to be extra-careful here */
245 if (svp) 454 AV *av = (AV *)AvARRAY (padlist)[i--];
246 { 455 I32 j = AvFILLp (av);
247 SV *sv; 456
248 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 457 while (j >= 0)
458 SvREFCNT_dec (AvARRAY (av)[j--]);
459
460 AvFILLp (av) = -1;
249 SvREFCNT_dec (sv); 461 SvREFCNT_dec (av);
250
251 SvREFCNT_dec (*svp);
252 }
253 } 462 }
254 463
464 SvREFCNT_dec (AvARRAY (padlist)[0]);
465
466 AvFILLp (padlist) = -1;
255 SvREFCNT_dec ((SV*)padlist); 467 SvREFCNT_dec ((SV*)padlist);
256 } 468 }
257} 469}
258 470
259static int 471static int
… …
264 476
265 /* casting is fun. */ 477 /* casting is fun. */
266 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 478 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267 free_padlist (aTHX_ padlist); 479 free_padlist (aTHX_ padlist);
268 480
269 SvREFCNT_dec (av); 481 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
270 482
271 return 0; 483 return 0;
272} 484}
273 485
274#define PERL_MAGIC_coro PERL_MAGIC_ext 486static MGVTBL coro_cv_vtbl = {
275 487 0, 0, 0, 0,
276static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 488 coro_cv_free
277 489};
278#define CORO_MAGIC(cv) \
279 SvMAGIC (cv) \
280 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
281 ? SvMAGIC (cv) \
282 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
283 : 0
284 490
285/* the next two functions merely cache the padlists */ 491/* the next two functions merely cache the padlists */
286static void 492static void
287get_padlist (pTHX_ CV *cv) 493get_padlist (pTHX_ CV *cv)
288{ 494{
289 MAGIC *mg = CORO_MAGIC (cv); 495 MAGIC *mg = CORO_MAGIC_cv (cv);
290 AV *av; 496 AV *av;
291 497
292 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 498 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
293 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 499 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 500 else
295 { 501 {
296#if CORO_PREFER_PERL_FUNCTIONS 502#if CORO_PREFER_PERL_FUNCTIONS
297 /* this is probably cleaner, but also slower? */ 503 /* this is probably cleaner? but also slower! */
504 /* in practise, it seems to be less stable */
298 CV *cp = Perl_cv_clone (cv); 505 CV *cp = Perl_cv_clone (aTHX_ cv);
299 CvPADLIST (cv) = CvPADLIST (cp); 506 CvPADLIST (cv) = CvPADLIST (cp);
300 CvPADLIST (cp) = 0; 507 CvPADLIST (cp) = 0;
301 SvREFCNT_dec (cp); 508 SvREFCNT_dec (cp);
302#else 509#else
303 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 510 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
304#endif 511#endif
305 } 512 }
306} 513}
307 514
308static void 515static void
309put_padlist (pTHX_ CV *cv) 516put_padlist (pTHX_ CV *cv)
310{ 517{
311 MAGIC *mg = CORO_MAGIC (cv); 518 MAGIC *mg = CORO_MAGIC_cv (cv);
312 AV *av; 519 AV *av;
313 520
314 if (!mg) 521 if (expect_false (!mg))
315 { 522 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
316 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
317 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
318 mg->mg_virtual = &vtbl_coro;
319 mg->mg_obj = (SV *)newAV ();
320 }
321 523
322 av = (AV *)mg->mg_obj; 524 av = (AV *)mg->mg_obj;
323 525
324 if (AvFILLp (av) >= AvMAX (av)) 526 if (expect_false (AvFILLp (av) >= AvMAX (av)))
325 av_extend (av, AvMAX (av) + 1); 527 av_extend (av, AvFILLp (av) + 1);
326 528
327 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 529 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
328} 530}
329 531
330/** load & save, init *******************************************************/ 532/** load & save, init *******************************************************/
331 533
332#define SB do { 534static void
333#define SE } while (0) 535on_enterleave_call (pTHX_ SV *cb);
334
335#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
336 536
337static void 537static void
338load_perl (pTHX_ Coro__State c) 538load_perl (pTHX_ Coro__State c)
339{ 539{
540 perl_slots *slot = c->slot;
541 c->slot = 0;
542
543 PL_mainstack = c->mainstack;
544
545 GvSV (PL_defgv) = slot->defsv;
546 GvAV (PL_defgv) = slot->defav;
547 GvSV (PL_errgv) = slot->errsv;
548 GvSV (irsgv) = slot->irsgv;
549 GvHV (PL_hintgv) = slot->hinthv;
550
340#define VAR(name,type) PL_ ## name = c->name; 551 #define VAR(name,type) PL_ ## name = slot->name;
341# include "state.h" 552 # include "state.h"
342#undef VAR 553 #undef VAR
343
344 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
348
349 if (c->irssv)
350 {
351 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
352 {
353 SvREFCNT_dec (c->irssv);
354 c->irssv = 0;
355 }
356 else
357 {
358 REPLACE_SV (PL_rs, c->irssv);
359 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
360 sv_setsv (c->irssv_sv, PL_rs);
361 }
362 }
363 554
364 { 555 {
365 dSP; 556 dSP;
557
366 CV *cv; 558 CV *cv;
367 559
368 /* now do the ugly restore mess */ 560 /* now do the ugly restore mess */
369 while ((cv = (CV *)POPs)) 561 while (expect_true (cv = (CV *)POPs))
370 { 562 {
371 put_padlist (aTHX_ cv); /* mark this padlist as available */ 563 put_padlist (aTHX_ cv); /* mark this padlist as available */
372 CvDEPTH (cv) = PTR2IV (POPs); 564 CvDEPTH (cv) = PTR2IV (POPs);
373 CvPADLIST (cv) = (AV *)POPs; 565 CvPADLIST (cv) = (AV *)POPs;
374 } 566 }
375 567
376 PUTBACK; 568 PUTBACK;
377 } 569 }
378 assert (!PL_comppad || AvARRAY (PL_comppad));//D 570
571 slf_frame = c->slf_frame;
572 CORO_THROW = c->except;
573
574 if (expect_false (c->on_enter))
575 {
576 int i;
577
578 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
579 on_enterleave_call (AvARRAY (c->on_enter)[i]);
580 }
379} 581}
380 582
381static void 583static void
382save_perl (pTHX_ Coro__State c) 584save_perl (pTHX_ Coro__State c)
383{ 585{
384 assert (!PL_comppad || AvARRAY (PL_comppad));//D 586 if (expect_false (c->on_leave))
587 {
588 int i;
589
590 for (i = AvFILLp (c->on_leave); i >= 0; --i)
591 on_enterleave_call (AvARRAY (c->on_leave)[i]);
592 }
593
594 c->except = CORO_THROW;
595 c->slf_frame = slf_frame;
596
385 { 597 {
386 dSP; 598 dSP;
387 I32 cxix = cxstack_ix; 599 I32 cxix = cxstack_ix;
388 PERL_CONTEXT *ccstk = cxstack; 600 PERL_CONTEXT *ccstk = cxstack;
389 PERL_SI *top_si = PL_curstackinfo; 601 PERL_SI *top_si = PL_curstackinfo;
… …
391 /* 603 /*
392 * the worst thing you can imagine happens first - we have to save 604 * the worst thing you can imagine happens first - we have to save
393 * (and reinitialize) all cv's in the whole callchain :( 605 * (and reinitialize) all cv's in the whole callchain :(
394 */ 606 */
395 607
396 EXTEND (SP, 3 + 1);
397 PUSHs (Nullsv); 608 XPUSHs (Nullsv);
398 /* this loop was inspired by pp_caller */ 609 /* this loop was inspired by pp_caller */
399 for (;;) 610 for (;;)
400 { 611 {
401 while (cxix >= 0) 612 while (expect_true (cxix >= 0))
402 { 613 {
403 PERL_CONTEXT *cx = &ccstk[cxix--]; 614 PERL_CONTEXT *cx = &ccstk[cxix--];
404 615
405 if (CxTYPE (cx) == CXt_SUB) 616 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
406 { 617 {
407 CV *cv = cx->blk_sub.cv; 618 CV *cv = cx->blk_sub.cv;
408 619
409 if (CvDEPTH (cv)) 620 if (expect_true (CvDEPTH (cv)))
410 { 621 {
411 EXTEND (SP, 3); 622 EXTEND (SP, 3);
412 PUSHs ((SV *)CvPADLIST (cv)); 623 PUSHs ((SV *)CvPADLIST (cv));
413 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 624 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 625 PUSHs ((SV *)cv);
415 626
416 CvDEPTH (cv) = 0; 627 CvDEPTH (cv) = 0;
417 get_padlist (aTHX_ cv); 628 get_padlist (aTHX_ cv);
418 } 629 }
419 } 630 }
420 } 631 }
421 632
422 if (top_si->si_type == PERLSI_MAIN) 633 if (expect_true (top_si->si_type == PERLSI_MAIN))
423 break; 634 break;
424 635
425 top_si = top_si->si_prev; 636 top_si = top_si->si_prev;
426 ccstk = top_si->si_cxstack; 637 ccstk = top_si->si_cxstack;
427 cxix = top_si->si_cxix; 638 cxix = top_si->si_cxix;
428 } 639 }
429 640
430 PUTBACK; 641 PUTBACK;
431 } 642 }
432 643
433 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 644 /* allocate some space on the context stack for our purposes */
434 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 645 /* we manually unroll here, as usually 2 slots is enough */
435 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 646 if (SLOT_COUNT >= 1) CXINC;
436 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 647 if (SLOT_COUNT >= 2) CXINC;
437 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 648 if (SLOT_COUNT >= 3) CXINC;
649 {
650 int i;
651 for (i = 3; i < SLOT_COUNT; ++i)
652 CXINC;
653 }
654 cxstack_ix -= SLOT_COUNT; /* undo allocation */
438 655
656 c->mainstack = PL_mainstack;
657
658 {
659 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
660
661 slot->defav = GvAV (PL_defgv);
662 slot->defsv = DEFSV;
663 slot->errsv = ERRSV;
664 slot->irsgv = GvSV (irsgv);
665 slot->hinthv = GvHV (PL_hintgv);
666
439#define VAR(name,type)c->name = PL_ ## name; 667 #define VAR(name,type) slot->name = PL_ ## name;
440# include "state.h" 668 # include "state.h"
441#undef VAR 669 #undef VAR
670 }
442} 671}
443 672
444/* 673/*
445 * allocate various perl stacks. This is an exact copy 674 * allocate various perl stacks. This is almost an exact copy
446 * of perl.c:init_stacks, except that it uses less memory 675 * of perl.c:init_stacks, except that it uses less memory
447 * on the (sometimes correct) assumption that coroutines do 676 * on the (sometimes correct) assumption that coroutines do
448 * not usually need a lot of stackspace. 677 * not usually need a lot of stackspace.
449 */ 678 */
450#if CORO_PREFER_PERL_FUNCTIONS 679#if CORO_PREFER_PERL_FUNCTIONS
451# define coro_init_stacks init_stacks 680# define coro_init_stacks(thx) init_stacks ()
452#else 681#else
453static void 682static void
454coro_init_stacks (pTHX) 683coro_init_stacks (pTHX)
455{ 684{
456 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 685 PL_curstackinfo = new_stackinfo(32, 8);
457 PL_curstackinfo->si_type = PERLSI_MAIN; 686 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack; 687 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 688 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460 689
461 PL_stack_base = AvARRAY(PL_curstack); 690 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base; 691 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 692 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464 693
465 New(50,PL_tmps_stack,128,SV*); 694 New(50,PL_tmps_stack,32,SV*);
466 PL_tmps_floor = -1; 695 PL_tmps_floor = -1;
467 PL_tmps_ix = -1; 696 PL_tmps_ix = -1;
468 PL_tmps_max = 128; 697 PL_tmps_max = 32;
469 698
470 New(54,PL_markstack,32,I32); 699 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack; 700 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 32; 701 PL_markstack_max = PL_markstack + 16;
473 702
474#ifdef SET_MARK_OFFSET 703#ifdef SET_MARK_OFFSET
475 SET_MARK_OFFSET; 704 SET_MARK_OFFSET;
476#endif 705#endif
477 706
478 New(54,PL_scopestack,32,I32); 707 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 708 PL_scopestack_ix = 0;
480 PL_scopestack_max = 32; 709 PL_scopestack_max = 8;
481 710
482 New(54,PL_savestack,64,ANY); 711 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 712 PL_savestack_ix = 0;
484 PL_savestack_max = 64; 713 PL_savestack_max = 24;
485 714
486#if !PERL_VERSION_ATLEAST (5,9,0) 715#if !PERL_VERSION_ATLEAST (5,10,0)
487 New(54,PL_retstack,16,OP*); 716 New(54,PL_retstack,4,OP*);
488 PL_retstack_ix = 0; 717 PL_retstack_ix = 0;
489 PL_retstack_max = 16; 718 PL_retstack_max = 4;
490#endif 719#endif
491} 720}
492#endif 721#endif
493 722
494/* 723/*
495 * destroy the stacks, the callchain etc... 724 * destroy the stacks, the callchain etc...
496 */ 725 */
497static void 726static void
498coro_destroy_stacks (pTHX) 727coro_destruct_stacks (pTHX)
499{ 728{
500 if (!IN_DESTRUCT)
501 {
502 /* restore all saved variables and stuff */
503 LEAVE_SCOPE (0);
504 assert (PL_tmps_floor == -1);
505
506 /* free all temporaries */
507 FREETMPS;
508 assert (PL_tmps_ix == -1);
509
510 /* unwind all extra stacks */
511 POPSTACK_TO (PL_mainstack);
512
513 /* unwind main stack */
514 dounwind (-1);
515 }
516
517 while (PL_curstackinfo->si_next) 729 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 730 PL_curstackinfo = PL_curstackinfo->si_next;
519 731
520 while (PL_curstackinfo) 732 while (PL_curstackinfo)
521 { 733 {
… …
531 743
532 Safefree (PL_tmps_stack); 744 Safefree (PL_tmps_stack);
533 Safefree (PL_markstack); 745 Safefree (PL_markstack);
534 Safefree (PL_scopestack); 746 Safefree (PL_scopestack);
535 Safefree (PL_savestack); 747 Safefree (PL_savestack);
536#if !PERL_VERSION_ATLEAST (5,9,0) 748#if !PERL_VERSION_ATLEAST (5,10,0)
537 Safefree (PL_retstack); 749 Safefree (PL_retstack);
538#endif 750#endif
539} 751}
540 752
753#define CORO_RSS \
754 rss += sizeof (SYM (curstackinfo)); \
755 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
756 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
757 rss += SYM (tmps_max) * sizeof (SV *); \
758 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
759 rss += SYM (scopestack_max) * sizeof (I32); \
760 rss += SYM (savestack_max) * sizeof (ANY);
761
762static size_t
763coro_rss (pTHX_ struct coro *coro)
764{
765 size_t rss = sizeof (*coro);
766
767 if (coro->mainstack)
768 {
769 if (coro->flags & CF_RUNNING)
770 {
771 #define SYM(sym) PL_ ## sym
772 CORO_RSS;
773 #undef SYM
774 }
775 else
776 {
777 #define SYM(sym) coro->slot->sym
778 CORO_RSS;
779 #undef SYM
780 }
781 }
782
783 return rss;
784}
785
541/** coroutine stack handling ************************************************/ 786/** coroutine stack handling ************************************************/
542 787
788static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
789static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
790static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
791
792/* apparently < 5.8.8 */
793#ifndef MgPV_nolen_const
794#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
795 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
796 (const char*)(mg)->mg_ptr)
797#endif
798
799/*
800 * This overrides the default magic get method of %SIG elements.
801 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
802 * and instead of trying to save and restore the hash elements, we just provide
803 * readback here.
804 */
543static void 805static int
806coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
820 return 0;
821 }
822 }
823
824 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
825}
826
827static int
828coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
829{
830 const char *s = MgPV_nolen_const (mg);
831
832 if (*s == '_')
833 {
834 SV **svp = 0;
835
836 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
837 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
838
839 if (svp)
840 {
841 SV *old = *svp;
842 *svp = 0;
843 SvREFCNT_dec (old);
844 return 0;
845 }
846 }
847
848 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
849}
850
851static int
852coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
853{
854 const char *s = MgPV_nolen_const (mg);
855
856 if (*s == '_')
857 {
858 SV **svp = 0;
859
860 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
861 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
862
863 if (svp)
864 {
865 SV *old = *svp;
866 *svp = SvOK (sv) ? newSVsv (sv) : 0;
867 SvREFCNT_dec (old);
868 return 0;
869 }
870 }
871
872 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
873}
874
875static void
876prepare_nop (pTHX_ struct coro_transfer_args *ta)
877{
878 /* kind of mega-hacky, but works */
879 ta->next = ta->prev = (struct coro *)ta;
880}
881
882static int
883slf_check_nop (pTHX_ struct CoroSLF *frame)
884{
885 return 0;
886}
887
888static int
889slf_check_repeat (pTHX_ struct CoroSLF *frame)
890{
891 return 1;
892}
893
894static UNOP coro_setup_op;
895
896static void NOINLINE /* noinline to keep it out of the transfer fast path */
544setup_coro (pTHX_ struct coro *coro) 897coro_setup (pTHX_ struct coro *coro)
545{ 898{
546 /* 899 /*
547 * emulate part of the perl startup here. 900 * emulate part of the perl startup here.
548 */ 901 */
549 coro_init_stacks (aTHX); 902 coro_init_stacks (aTHX);
550 903
904 PL_runops = RUNOPS_DEFAULT;
551 PL_curcop = &PL_compiling; 905 PL_curcop = &PL_compiling;
552 PL_in_eval = EVAL_NULL; 906 PL_in_eval = EVAL_NULL;
553 PL_comppad = 0; 907 PL_comppad = 0;
908 PL_comppad_name = 0;
909 PL_comppad_name_fill = 0;
910 PL_comppad_name_floor = 0;
554 PL_curpm = 0; 911 PL_curpm = 0;
912 PL_curpad = 0;
555 PL_localizing = 0; 913 PL_localizing = 0;
556 PL_dirty = 0; 914 PL_dirty = 0;
557 PL_restartop = 0; 915 PL_restartop = 0;
916#if PERL_VERSION_ATLEAST (5,10,0)
917 PL_parser = 0;
918#endif
919 PL_hints = 0;
920
921 /* recreate the die/warn hooks */
922 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
923 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
924
925 GvSV (PL_defgv) = newSV (0);
926 GvAV (PL_defgv) = coro->args; coro->args = 0;
927 GvSV (PL_errgv) = newSV (0);
928 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
929 GvHV (PL_hintgv) = 0;
930 PL_rs = newSVsv (GvSV (irsgv));
931 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
558 932
559 { 933 {
560 dSP; 934 dSP;
561 LOGOP myop; 935 UNOP myop;
562 936
563 SvREFCNT_dec (GvAV (PL_defgv));
564 GvAV (PL_defgv) = coro->args; coro->args = 0;
565
566 Zero (&myop, 1, LOGOP); 937 Zero (&myop, 1, UNOP);
567 myop.op_next = Nullop; 938 myop.op_next = Nullop;
939 myop.op_type = OP_ENTERSUB;
568 myop.op_flags = OPf_WANT_VOID; 940 myop.op_flags = OPf_WANT_VOID;
569 941
570 PUSHMARK (SP); 942 PUSHMARK (SP);
571 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 943 PUSHs ((SV *)coro->startcv);
572 PUTBACK; 944 PUTBACK;
573 PL_op = (OP *)&myop; 945 PL_op = (OP *)&myop;
574 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 946 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575 SPAGAIN;
576 } 947 }
577 948
578 ENTER; /* necessary e.g. for dounwind */ 949 /* this newly created coroutine might be run on an existing cctx which most
579} 950 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
951 */
952 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
953 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
580 954
955 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
956 coro_setup_op.op_next = PL_op;
957 coro_setup_op.op_type = OP_ENTERSUB;
958 coro_setup_op.op_ppaddr = pp_slf;
959 /* no flags etc. required, as an init function won't be called */
960
961 PL_op = (OP *)&coro_setup_op;
962
963 /* copy throw, in case it was set before coro_setup */
964 CORO_THROW = coro->except;
965}
966
581static void 967static void
968coro_unwind_stacks (pTHX)
969{
970 if (!IN_DESTRUCT)
971 {
972 /* restore all saved variables and stuff */
973 LEAVE_SCOPE (0);
974 assert (PL_tmps_floor == -1);
975
976 /* free all temporaries */
977 FREETMPS;
978 assert (PL_tmps_ix == -1);
979
980 /* unwind all extra stacks */
981 POPSTACK_TO (PL_mainstack);
982
983 /* unwind main stack */
984 dounwind (-1);
985 }
986}
987
988static void
989coro_destruct_perl (pTHX_ struct coro *coro)
990{
991 coro_unwind_stacks (aTHX);
992
993 SvREFCNT_dec (GvSV (PL_defgv));
994 SvREFCNT_dec (GvAV (PL_defgv));
995 SvREFCNT_dec (GvSV (PL_errgv));
996 SvREFCNT_dec (PL_defoutgv);
997 SvREFCNT_dec (PL_rs);
998 SvREFCNT_dec (GvSV (irsgv));
999 SvREFCNT_dec (GvHV (PL_hintgv));
1000
1001 SvREFCNT_dec (PL_diehook);
1002 SvREFCNT_dec (PL_warnhook);
1003
1004 SvREFCNT_dec (coro->saved_deffh);
1005 SvREFCNT_dec (coro->rouse_cb);
1006 SvREFCNT_dec (coro->invoke_cb);
1007 SvREFCNT_dec (coro->invoke_av);
1008
1009 coro_destruct_stacks (aTHX);
1010}
1011
1012INLINE void
582free_coro_mortal (pTHX) 1013free_coro_mortal (pTHX)
583{ 1014{
584 if (coro_mortal) 1015 if (expect_true (coro_mortal))
585 { 1016 {
586 SvREFCNT_dec (coro_mortal); 1017 SvREFCNT_dec (coro_mortal);
587 coro_mortal = 0; 1018 coro_mortal = 0;
588 } 1019 }
589} 1020}
590 1021
591/* inject a fake call to Coro::State::_cctx_init into the execution */ 1022static int
1023runops_trace (pTHX)
1024{
1025 COP *oldcop = 0;
1026 int oldcxix = -2;
1027
1028 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1029 {
1030 PERL_ASYNC_CHECK ();
1031
1032 if (cctx_current->flags & CC_TRACE_ALL)
1033 {
1034 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1035 {
1036 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1037 SV **bot, **top;
1038 AV *av = newAV (); /* return values */
1039 SV **cb;
1040 dSP;
1041
1042 GV *gv = CvGV (cx->blk_sub.cv);
1043 SV *fullname = sv_2mortal (newSV (0));
1044 if (isGV (gv))
1045 gv_efullname3 (fullname, gv, 0);
1046
1047 bot = PL_stack_base + cx->blk_oldsp + 1;
1048 top = cx->blk_gimme == G_ARRAY ? SP + 1
1049 : cx->blk_gimme == G_SCALAR ? bot + 1
1050 : bot;
1051
1052 av_extend (av, top - bot);
1053 while (bot < top)
1054 av_push (av, SvREFCNT_inc_NN (*bot++));
1055
1056 PL_runops = RUNOPS_DEFAULT;
1057 ENTER;
1058 SAVETMPS;
1059 EXTEND (SP, 3);
1060 PUSHMARK (SP);
1061 PUSHs (&PL_sv_no);
1062 PUSHs (fullname);
1063 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1064 PUTBACK;
1065 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1066 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1067 SPAGAIN;
1068 FREETMPS;
1069 LEAVE;
1070 PL_runops = runops_trace;
1071 }
1072
1073 if (oldcop != PL_curcop)
1074 {
1075 oldcop = PL_curcop;
1076
1077 if (PL_curcop != &PL_compiling)
1078 {
1079 SV **cb;
1080
1081 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1082 {
1083 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1084
1085 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1086 {
1087 dSP;
1088 GV *gv = CvGV (cx->blk_sub.cv);
1089 SV *fullname = sv_2mortal (newSV (0));
1090
1091 if (isGV (gv))
1092 gv_efullname3 (fullname, gv, 0);
1093
1094 PL_runops = RUNOPS_DEFAULT;
1095 ENTER;
1096 SAVETMPS;
1097 EXTEND (SP, 3);
1098 PUSHMARK (SP);
1099 PUSHs (&PL_sv_yes);
1100 PUSHs (fullname);
1101 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1102 PUTBACK;
1103 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1104 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1105 SPAGAIN;
1106 FREETMPS;
1107 LEAVE;
1108 PL_runops = runops_trace;
1109 }
1110
1111 oldcxix = cxstack_ix;
1112 }
1113
1114 if (cctx_current->flags & CC_TRACE_LINE)
1115 {
1116 dSP;
1117
1118 PL_runops = RUNOPS_DEFAULT;
1119 ENTER;
1120 SAVETMPS;
1121 EXTEND (SP, 3);
1122 PL_runops = RUNOPS_DEFAULT;
1123 PUSHMARK (SP);
1124 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1125 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1126 PUTBACK;
1127 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1128 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1129 SPAGAIN;
1130 FREETMPS;
1131 LEAVE;
1132 PL_runops = runops_trace;
1133 }
1134 }
1135 }
1136 }
1137 }
1138
1139 TAINT_NOT;
1140 return 0;
1141}
1142
1143static struct CoroSLF cctx_ssl_frame;
1144
1145static void
1146slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1147{
1148 ta->prev = 0;
1149}
1150
1151static int
1152slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1153{
1154 *frame = cctx_ssl_frame;
1155
1156 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1157}
1158
1159/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
592static void NOINLINE 1160static void NOINLINE
593prepare_cctx (pTHX_ coro_cctx *cctx) 1161cctx_prepare (pTHX)
594{ 1162{
595 dSP;
596 LOGOP myop;
597
598 Zero (&myop, 1, LOGOP);
599 myop.op_next = PL_op;
600 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
601
602 PUSHMARK (SP);
603 EXTEND (SP, 2);
604 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
605 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
606 PUTBACK;
607 PL_op = (OP *)&myop;
608 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN;
610}
611
612static void
613coro_run (void *arg)
614{
615 dTHX;
616
617 /* coro_run is the alternative tail of transfer(), so unlock here. */
618 UNLOCK;
619
620 /*
621 * this is a _very_ stripped down perl interpreter ;)
622 */
623 PL_top_env = &PL_start_env; 1163 PL_top_env = &PL_start_env;
624 1164
1165 if (cctx_current->flags & CC_TRACE)
1166 PL_runops = runops_trace;
1167
1168 /* we already must be executing an SLF op, there is no other valid way
1169 * that can lead to creation of a new cctx */
1170 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1171 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1172
1173 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1174 cctx_ssl_frame = slf_frame;
1175
1176 slf_frame.prepare = slf_prepare_set_stacklevel;
1177 slf_frame.check = slf_check_set_stacklevel;
1178}
1179
1180/* the tail of transfer: execute stuff we can only do after a transfer */
1181INLINE void
1182transfer_tail (pTHX)
1183{
1184 free_coro_mortal (aTHX);
1185}
1186
1187/*
1188 * this is a _very_ stripped down perl interpreter ;)
1189 */
1190static void
1191cctx_run (void *arg)
1192{
1193#ifdef USE_ITHREADS
1194# if CORO_PTHREAD
1195 PERL_SET_CONTEXT (coro_thx);
1196# endif
1197#endif
1198 {
1199 dTHX;
1200
1201 /* normally we would need to skip the entersub here */
1202 /* not doing so will re-execute it, which is exactly what we want */
1203 /* PL_nop = PL_nop->op_next */
1204
625 /* inject call to cctx_init */ 1205 /* inject a fake subroutine call to cctx_init */
626 prepare_cctx (aTHX_ (coro_cctx *)arg); 1206 cctx_prepare (aTHX);
627 1207
1208 /* cctx_run is the alternative tail of transfer() */
1209 transfer_tail (aTHX);
1210
628 /* somebody will hit me for both perl_run and PL_restartop */ 1211 /* somebody or something will hit me for both perl_run and PL_restartop */
629 PL_restartop = PL_op; 1212 PL_restartop = PL_op;
630 perl_run (PL_curinterp); 1213 perl_run (PL_curinterp);
1214 /*
1215 * Unfortunately, there is no way to get at the return values of the
1216 * coro body here, as perl_run destroys these
1217 */
631 1218
632 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1219 /*
633 abort (); 1220 * If perl-run returns we assume exit() was being called or the coro
1221 * fell off the end, which seems to be the only valid (non-bug)
1222 * reason for perl_run to return. We try to exit by jumping to the
1223 * bootstrap-time "top" top_env, as we cannot restore the "main"
1224 * coroutine as Coro has no such concept.
1225 * This actually isn't valid with the pthread backend, but OSes requiring
1226 * that backend are too broken to do it in a standards-compliant way.
1227 */
1228 PL_top_env = main_top_env;
1229 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1230 }
634} 1231}
635 1232
636static coro_cctx * 1233static coro_cctx *
637cctx_new () 1234cctx_new ()
638{ 1235{
639 coro_cctx *cctx; 1236 coro_cctx *cctx;
1237
1238 ++cctx_count;
1239 New (0, cctx, 1, coro_cctx);
1240
1241 cctx->gen = cctx_gen;
1242 cctx->flags = 0;
1243 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1244
1245 return cctx;
1246}
1247
1248/* create a new cctx only suitable as source */
1249static coro_cctx *
1250cctx_new_empty ()
1251{
1252 coro_cctx *cctx = cctx_new ();
1253
1254 cctx->sptr = 0;
1255 coro_create (&cctx->cctx, 0, 0, 0, 0);
1256
1257 return cctx;
1258}
1259
1260/* create a new cctx suitable as destination/running a perl interpreter */
1261static coro_cctx *
1262cctx_new_run ()
1263{
1264 coro_cctx *cctx = cctx_new ();
640 void *stack_start; 1265 void *stack_start;
641 size_t stack_size; 1266 size_t stack_size;
642 1267
643 ++cctx_count;
644
645 Newz (0, cctx, 1, coro_cctx);
646
647#if HAVE_MMAP 1268#if HAVE_MMAP
648
649 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1269 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
650 /* mmap supposedly does allocate-on-write for us */ 1270 /* mmap supposedly does allocate-on-write for us */
651 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1271 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
652 1272
653 if (cctx->sptr != (void *)-1) 1273 if (cctx->sptr != (void *)-1)
654 { 1274 {
655# if CORO_STACKGUARD 1275 #if CORO_STACKGUARD
656 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1276 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
657# endif 1277 #endif
658 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1278 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
659 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1279 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
660 cctx->mapped = 1; 1280 cctx->flags |= CC_MAPPED;
661 } 1281 }
662 else 1282 else
663#endif 1283#endif
664 { 1284 {
665 cctx->ssize = coro_stacksize * (long)sizeof (long); 1285 cctx->ssize = cctx_stacksize * (long)sizeof (long);
666 New (0, cctx->sptr, coro_stacksize, long); 1286 New (0, cctx->sptr, cctx_stacksize, long);
667 1287
668 if (!cctx->sptr) 1288 if (!cctx->sptr)
669 { 1289 {
670 perror ("FATAL: unable to allocate stack for coroutine"); 1290 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
671 _exit (EXIT_FAILURE); 1291 _exit (EXIT_FAILURE);
672 } 1292 }
673 1293
674 stack_start = cctx->sptr; 1294 stack_start = cctx->sptr;
675 stack_size = cctx->ssize; 1295 stack_size = cctx->ssize;
676 } 1296 }
677 1297
678 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1298 #if CORO_USE_VALGRIND
1299 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1300 #endif
1301
679 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1302 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
680 1303
681 return cctx; 1304 return cctx;
682} 1305}
683 1306
684static void 1307static void
685cctx_destroy (coro_cctx *cctx) 1308cctx_destroy (coro_cctx *cctx)
686{ 1309{
687 if (!cctx) 1310 if (!cctx)
688 return; 1311 return;
689 1312
1313 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1314
690 --cctx_count; 1315 --cctx_count;
1316 coro_destroy (&cctx->cctx);
691 1317
1318 /* coro_transfer creates new, empty cctx's */
1319 if (cctx->sptr)
1320 {
692#if CORO_USE_VALGRIND 1321 #if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1322 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1323 #endif
695 1324
696#if HAVE_MMAP 1325#if HAVE_MMAP
697 if (cctx->mapped) 1326 if (cctx->flags & CC_MAPPED)
698 munmap (cctx->sptr, cctx->ssize); 1327 munmap (cctx->sptr, cctx->ssize);
699 else 1328 else
700#endif 1329#endif
701 Safefree (cctx->sptr); 1330 Safefree (cctx->sptr);
1331 }
702 1332
703 Safefree (cctx); 1333 Safefree (cctx);
704} 1334}
1335
1336/* wether this cctx should be destructed */
1337#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
705 1338
706static coro_cctx * 1339static coro_cctx *
707cctx_get (pTHX) 1340cctx_get (pTHX)
708{ 1341{
709 while (cctx_first) 1342 while (expect_true (cctx_first))
710 { 1343 {
711 coro_cctx *cctx = cctx_first; 1344 coro_cctx *cctx = cctx_first;
712 cctx_first = cctx->next; 1345 cctx_first = cctx->next;
713 --cctx_idle; 1346 --cctx_idle;
714 1347
715 if (cctx->ssize >= coro_stacksize) 1348 if (expect_true (!CCTX_EXPIRED (cctx)))
716 return cctx; 1349 return cctx;
717 1350
718 cctx_destroy (cctx); 1351 cctx_destroy (cctx);
719 } 1352 }
720 1353
721 PL_op = PL_op->op_next;
722 return cctx_new (); 1354 return cctx_new_run ();
723} 1355}
724 1356
725static void 1357static void
726cctx_put (coro_cctx *cctx) 1358cctx_put (coro_cctx *cctx)
727{ 1359{
1360 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1361
728 /* free another cctx if overlimit */ 1362 /* free another cctx if overlimit */
729 if (cctx_idle >= MAX_IDLE_CCTX) 1363 if (expect_false (cctx_idle >= cctx_max_idle))
730 { 1364 {
731 coro_cctx *first = cctx_first; 1365 coro_cctx *first = cctx_first;
732 cctx_first = first->next; 1366 cctx_first = first->next;
733 --cctx_idle; 1367 --cctx_idle;
734 1368
735 assert (!first->inuse);
736 cctx_destroy (first); 1369 cctx_destroy (first);
737 } 1370 }
738 1371
739 ++cctx_idle; 1372 ++cctx_idle;
740 cctx->next = cctx_first; 1373 cctx->next = cctx_first;
741 cctx_first = cctx; 1374 cctx_first = cctx;
742} 1375}
743 1376
744/** coroutine switching *****************************************************/ 1377/** coroutine switching *****************************************************/
745 1378
746/* never call directly, always through the coro_state_transfer global variable */ 1379static void
747static void NOINLINE
748transfer (pTHX_ struct coro *prev, struct coro *next) 1380transfer_check (pTHX_ struct coro *prev, struct coro *next)
1381{
1382 /* TODO: throwing up here is considered harmful */
1383
1384 if (expect_true (prev != next))
1385 {
1386 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1387 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1388
1389 if (expect_false (next->flags & CF_RUNNING))
1390 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1391
1392 if (expect_false (next->flags & CF_DESTROYED))
1393 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1394
1395#if !PERL_VERSION_ATLEAST (5,10,0)
1396 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1397 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1398#endif
1399 }
1400}
1401
1402/* always use the TRANSFER macro */
1403static void NOINLINE /* noinline so we have a fixed stackframe */
1404transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
749{ 1405{
750 dSTACKLEVEL; 1406 dSTACKLEVEL;
751 1407
752 /* sometimes transfer is only called to set idle_sp */ 1408 /* sometimes transfer is only called to set idle_sp */
753 if (!next) 1409 if (expect_false (!prev))
754 { 1410 {
755 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1411 cctx_current->idle_sp = STACKLEVEL;
756 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1412 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
757 }
758 else if (prev != next)
759 { 1413 }
1414 else if (expect_true (prev != next))
1415 {
760 coro_cctx *prev__cctx; 1416 coro_cctx *cctx_prev;
761 1417
762 if (prev->flags & CF_NEW) 1418 if (expect_false (prev->flags & CF_NEW))
763 { 1419 {
764 /* create a new empty context */ 1420 /* create a new empty/source context */
765 Newz (0, prev->cctx, 1, coro_cctx);
766 prev->cctx->inuse = 1;
767 prev->flags &= ~CF_NEW; 1421 prev->flags &= ~CF_NEW;
768 prev->flags |= CF_RUNNING; 1422 prev->flags |= CF_RUNNING;
769 } 1423 }
770 1424
771 /*TODO: must not croak here */
772 if (!prev->flags & CF_RUNNING)
773 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
774
775 if (next->flags & CF_RUNNING)
776 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
777
778 if (next->flags & CF_DESTROYED)
779 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
780
781 prev->flags &= ~CF_RUNNING; 1425 prev->flags &= ~CF_RUNNING;
782 next->flags |= CF_RUNNING; 1426 next->flags |= CF_RUNNING;
783 1427
784 LOCK; 1428 /* first get rid of the old state */
1429 save_perl (aTHX_ prev);
785 1430
786 if (next->flags & CF_NEW) 1431 if (expect_false (next->flags & CF_NEW))
787 { 1432 {
788 /* need to start coroutine */ 1433 /* need to start coroutine */
789 next->flags &= ~CF_NEW; 1434 next->flags &= ~CF_NEW;
790 /* first get rid of the old state */
791 save_perl (aTHX_ prev);
792 /* setup coroutine call */ 1435 /* setup coroutine call */
793 setup_coro (aTHX_ next); 1436 coro_setup (aTHX_ next);
794 /* need a new stack */
795 assert (!next->cctx);
796 } 1437 }
797 else 1438 else
1439 load_perl (aTHX_ next);
1440
1441 /* possibly untie and reuse the cctx */
1442 if (expect_true (
1443 cctx_current->idle_sp == STACKLEVEL
1444 && !(cctx_current->flags & CC_TRACE)
1445 && !force_cctx
1446 ))
798 { 1447 {
799 /* coroutine already started */ 1448 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
800 save_perl (aTHX_ prev); 1449 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
801 load_perl (aTHX_ next); 1450
1451 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1452 /* without this the next cctx_get might destroy the running cctx while still in use */
1453 if (expect_false (CCTX_EXPIRED (cctx_current)))
1454 if (expect_true (!next->cctx))
1455 next->cctx = cctx_get (aTHX);
1456
1457 cctx_put (cctx_current);
802 } 1458 }
1459 else
1460 prev->cctx = cctx_current;
803 1461
804 prev__cctx = prev->cctx; 1462 ++next->usecount;
805 1463
806 /* possibly "free" the cctx */ 1464 cctx_prev = cctx_current;
807 if (prev__cctx->idle_sp == STACKLEVEL) 1465 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1466
1467 next->cctx = 0;
1468
1469 if (expect_false (cctx_prev != cctx_current))
808 { 1470 {
809 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1471 cctx_prev->top_env = PL_top_env;
810 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1472 PL_top_env = cctx_current->top_env;
811 1473 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
812 prev->cctx = 0;
813
814 cctx_put (prev__cctx);
815 prev__cctx->inuse = 0;
816 } 1474 }
817 1475
818 if (!next->cctx) 1476 transfer_tail (aTHX);
819 {
820 next->cctx = cctx_get (aTHX);
821 assert (!next->cctx->inuse);
822 next->cctx->inuse = 1;
823 }
824
825 if (prev__cctx != next->cctx)
826 {
827 prev__cctx->top_env = PL_top_env;
828 PL_top_env = next->cctx->top_env;
829 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
830 }
831
832 free_coro_mortal (aTHX);
833 UNLOCK;
834 } 1477 }
835} 1478}
836 1479
837struct transfer_args 1480#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
838{
839 struct coro *prev, *next;
840};
841
842#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1481#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
843 1482
844/** high level stuff ********************************************************/ 1483/** high level stuff ********************************************************/
845 1484
846static int 1485static int
847coro_state_destroy (pTHX_ struct coro *coro) 1486coro_state_destroy (pTHX_ struct coro *coro)
848{ 1487{
849 if (coro->flags & CF_DESTROYED) 1488 if (coro->flags & CF_DESTROYED)
850 return 0; 1489 return 0;
1490
1491 if (coro->on_destroy)
1492 coro->on_destroy (aTHX_ coro);
851 1493
852 coro->flags |= CF_DESTROYED; 1494 coro->flags |= CF_DESTROYED;
853 1495
854 if (coro->flags & CF_READY) 1496 if (coro->flags & CF_READY)
855 { 1497 {
856 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1498 /* reduce nready, as destroying a ready coro effectively unreadies it */
857 /* alternative: look through all ready queues and remove the coro */ 1499 /* alternative: look through all ready queues and remove the coro */
858 LOCK;
859 --coro_nready; 1500 --coro_nready;
860 UNLOCK;
861 } 1501 }
862 else 1502 else
863 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1503 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
864 1504
865 if (coro->mainstack && coro->mainstack != main_mainstack) 1505 if (coro->mainstack
1506 && coro->mainstack != main_mainstack
1507 && coro->slot
1508 && !PL_dirty)
866 { 1509 {
867 struct coro temp; 1510 struct coro *current = SvSTATE_current;
868 1511
869 assert (!(coro->flags & CF_RUNNING)); 1512 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
870 1513
871 Zero (&temp, 1, struct coro);
872 temp.save = CORO_SAVE_DEF;
873
874 if (coro->flags & CF_RUNNING)
875 croak ("FATAL: tried to destroy currently running coroutine");
876
877 save_perl (aTHX_ &temp); 1514 save_perl (aTHX_ current);
878 load_perl (aTHX_ coro); 1515 load_perl (aTHX_ coro);
879 1516
880 coro_destroy_stacks (aTHX); 1517 coro_destruct_perl (aTHX_ coro);
881 1518
882 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1519 load_perl (aTHX_ current);
883 1520
884 coro->mainstack = 0; 1521 coro->slot = 0;
885 } 1522 }
886 1523
887 cctx_destroy (coro->cctx); 1524 cctx_destroy (coro->cctx);
1525 SvREFCNT_dec (coro->startcv);
888 SvREFCNT_dec (coro->args); 1526 SvREFCNT_dec (coro->args);
1527 SvREFCNT_dec (CORO_THROW);
1528
1529 if (coro->next) coro->next->prev = coro->prev;
1530 if (coro->prev) coro->prev->next = coro->next;
1531 if (coro == coro_first) coro_first = coro->next;
889 1532
890 return 1; 1533 return 1;
891} 1534}
892 1535
893static int 1536static int
894coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1537coro_state_free (pTHX_ SV *sv, MAGIC *mg)
895{ 1538{
896 struct coro *coro = (struct coro *)mg->mg_ptr; 1539 struct coro *coro = (struct coro *)mg->mg_ptr;
897 mg->mg_ptr = 0; 1540 mg->mg_ptr = 0;
1541
1542 coro->hv = 0;
898 1543
899 if (--coro->refcnt < 0) 1544 if (--coro->refcnt < 0)
900 { 1545 {
901 coro_state_destroy (aTHX_ coro); 1546 coro_state_destroy (aTHX_ coro);
902 Safefree (coro); 1547 Safefree (coro);
… …
924#else 1569#else
925# define MGf_DUP 0 1570# define MGf_DUP 0
926#endif 1571#endif
927}; 1572};
928 1573
929static struct coro *
930SvSTATE_ (pTHX_ SV *coro)
931{
932 HV *stash;
933 MAGIC *mg;
934
935 if (SvROK (coro))
936 coro = SvRV (coro);
937
938 stash = SvSTASH (coro);
939 if (stash != coro_stash && stash != coro_state_stash)
940 {
941 /* very slow, but rare, check */
942 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
943 croak ("Coro::State object required");
944 }
945
946 mg = CORO_MAGIC (coro);
947 return (struct coro *)mg->mg_ptr;
948}
949
950#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
951
952static void 1574static void
953prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1575prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
954{ 1576{
955 ta->prev = SvSTATE (prev_sv); 1577 ta->prev = SvSTATE (prev_sv);
956 ta->next = SvSTATE (next_sv); 1578 ta->next = SvSTATE (next_sv);
1579 TRANSFER_CHECK (*ta);
957} 1580}
958 1581
959static void 1582static void
960api_transfer (SV *prev_sv, SV *next_sv) 1583api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
961{ 1584{
962 dTHX;
963 struct transfer_args ta; 1585 struct coro_transfer_args ta;
964 1586
965 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1587 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
966 TRANSFER (ta); 1588 TRANSFER (ta, 1);
967} 1589}
968 1590
969static int 1591/*****************************************************************************/
970api_save (SV *coro_sv, int new_save) 1592/* gensub: simple closure generation utility */
971{
972 dTHX;
973 struct coro *coro = SvSTATE (coro_sv);
974 int old_save = coro->save;
975 1593
976 if (new_save >= 0) 1594#define GENSUB_ARG CvXSUBANY (cv).any_ptr
977 coro->save = new_save;
978 1595
979 return old_save; 1596/* create a closure from XS, returns a code reference */
1597/* the arg can be accessed via GENSUB_ARG from the callback */
1598/* the callback must use dXSARGS/XSRETURN */
1599static SV *
1600gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1601{
1602 CV *cv = (CV *)newSV (0);
1603
1604 sv_upgrade ((SV *)cv, SVt_PVCV);
1605
1606 CvANON_on (cv);
1607 CvISXSUB_on (cv);
1608 CvXSUB (cv) = xsub;
1609 GENSUB_ARG = arg;
1610
1611 return newRV_noinc ((SV *)cv);
980} 1612}
981 1613
982/** Coro ********************************************************************/ 1614/** Coro ********************************************************************/
983 1615
984static void 1616INLINE void
985coro_enq (pTHX_ SV *coro_sv) 1617coro_enq (pTHX_ struct coro *coro)
986{ 1618{
987 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1619 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
988} 1620}
989 1621
990static SV * 1622INLINE SV *
991coro_deq (pTHX_ int min_prio) 1623coro_deq (pTHX)
992{ 1624{
993 int prio = PRIO_MAX - PRIO_MIN; 1625 int prio;
994 1626
995 min_prio -= PRIO_MIN;
996 if (min_prio < 0)
997 min_prio = 0;
998
999 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1627 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1000 if (AvFILLp (coro_ready [prio]) >= 0) 1628 if (AvFILLp (coro_ready [prio]) >= 0)
1001 return av_shift (coro_ready [prio]); 1629 return av_shift (coro_ready [prio]);
1002 1630
1003 return 0; 1631 return 0;
1004} 1632}
1005 1633
1006static int 1634static int
1007api_ready (SV *coro_sv) 1635api_ready (pTHX_ SV *coro_sv)
1008{ 1636{
1009 dTHX;
1010 struct coro *coro; 1637 struct coro *coro;
1011 1638 SV *sv_hook;
1012 if (SvROK (coro_sv)) 1639 void (*xs_hook)(void);
1013 coro_sv = SvRV (coro_sv);
1014 1640
1015 coro = SvSTATE (coro_sv); 1641 coro = SvSTATE (coro_sv);
1016 1642
1017 if (coro->flags & CF_READY) 1643 if (coro->flags & CF_READY)
1018 return 0; 1644 return 0;
1019 1645
1020 coro->flags |= CF_READY; 1646 coro->flags |= CF_READY;
1021 1647
1022 LOCK; 1648 sv_hook = coro_nready ? 0 : coro_readyhook;
1023 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1649 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1650
1651 coro_enq (aTHX_ coro);
1024 ++coro_nready; 1652 ++coro_nready;
1025 UNLOCK; 1653
1654 if (sv_hook)
1655 {
1656 dSP;
1657
1658 ENTER;
1659 SAVETMPS;
1660
1661 PUSHMARK (SP);
1662 PUTBACK;
1663 call_sv (sv_hook, G_VOID | G_DISCARD);
1664
1665 FREETMPS;
1666 LEAVE;
1667 }
1668
1669 if (xs_hook)
1670 xs_hook ();
1026 1671
1027 return 1; 1672 return 1;
1028} 1673}
1029 1674
1030static int 1675static int
1031api_is_ready (SV *coro_sv) 1676api_is_ready (pTHX_ SV *coro_sv)
1032{ 1677{
1033 dTHX;
1034 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1678 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1035} 1679}
1036 1680
1681/* expects to own a reference to next->hv */
1682INLINE void
1683prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1684{
1685 SV *prev_sv = SvRV (coro_current);
1686
1687 ta->prev = SvSTATE_hv (prev_sv);
1688 ta->next = next;
1689
1690 TRANSFER_CHECK (*ta);
1691
1692 SvRV_set (coro_current, (SV *)next->hv);
1693
1694 free_coro_mortal (aTHX);
1695 coro_mortal = prev_sv;
1696}
1697
1037static void 1698static void
1038prepare_schedule (pTHX_ struct transfer_args *ta) 1699prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1039{ 1700{
1040 SV *prev_sv, *next_sv;
1041
1042 for (;;) 1701 for (;;)
1043 { 1702 {
1044 LOCK;
1045 next_sv = coro_deq (aTHX_ PRIO_MIN); 1703 SV *next_sv = coro_deq (aTHX);
1046 1704
1705 if (expect_true (next_sv))
1706 {
1707 struct coro *next = SvSTATE_hv (next_sv);
1708
1709 /* cannot transfer to destroyed coros, skip and look for next */
1710 if (expect_false (next->flags & CF_DESTROYED))
1711 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1712 else
1713 {
1714 next->flags &= ~CF_READY;
1715 --coro_nready;
1716
1717 prepare_schedule_to (aTHX_ ta, next);
1718 break;
1719 }
1720 }
1721 else
1722 {
1047 /* nothing to schedule: call the idle handler */ 1723 /* nothing to schedule: call the idle handler */
1048 if (!next_sv) 1724 if (SvROK (sv_idle)
1725 && SvOBJECT (SvRV (sv_idle)))
1726 {
1727 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1728 api_ready (aTHX_ SvRV (sv_idle));
1729 --coro_nready;
1730 }
1731 else
1732 {
1733 dSP;
1734
1735 ENTER;
1736 SAVETMPS;
1737
1738 PUSHMARK (SP);
1739 PUTBACK;
1740 call_sv (sv_idle, G_VOID | G_DISCARD);
1741
1742 FREETMPS;
1743 LEAVE;
1744 }
1745 }
1746 }
1747}
1748
1749INLINE void
1750prepare_cede (pTHX_ struct coro_transfer_args *ta)
1751{
1752 api_ready (aTHX_ coro_current);
1753 prepare_schedule (aTHX_ ta);
1754}
1755
1756INLINE void
1757prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1758{
1759 SV *prev = SvRV (coro_current);
1760
1761 if (coro_nready)
1762 {
1763 prepare_schedule (aTHX_ ta);
1764 api_ready (aTHX_ prev);
1765 }
1766 else
1767 prepare_nop (aTHX_ ta);
1768}
1769
1770static void
1771api_schedule (pTHX)
1772{
1773 struct coro_transfer_args ta;
1774
1775 prepare_schedule (aTHX_ &ta);
1776 TRANSFER (ta, 1);
1777}
1778
1779static void
1780api_schedule_to (pTHX_ SV *coro_sv)
1781{
1782 struct coro_transfer_args ta;
1783 struct coro *next = SvSTATE (coro_sv);
1784
1785 SvREFCNT_inc_NN (coro_sv);
1786 prepare_schedule_to (aTHX_ &ta, next);
1787}
1788
1789static int
1790api_cede (pTHX)
1791{
1792 struct coro_transfer_args ta;
1793
1794 prepare_cede (aTHX_ &ta);
1795
1796 if (expect_true (ta.prev != ta.next))
1797 {
1798 TRANSFER (ta, 1);
1799 return 1;
1800 }
1801 else
1802 return 0;
1803}
1804
1805static int
1806api_cede_notself (pTHX)
1807{
1808 if (coro_nready)
1809 {
1810 struct coro_transfer_args ta;
1811
1812 prepare_cede_notself (aTHX_ &ta);
1813 TRANSFER (ta, 1);
1814 return 1;
1815 }
1816 else
1817 return 0;
1818}
1819
1820static void
1821api_trace (pTHX_ SV *coro_sv, int flags)
1822{
1823 struct coro *coro = SvSTATE (coro_sv);
1824
1825 if (coro->flags & CF_RUNNING)
1826 croak ("cannot enable tracing on a running coroutine, caught");
1827
1828 if (flags & CC_TRACE)
1829 {
1830 if (!coro->cctx)
1831 coro->cctx = cctx_new_run ();
1832 else if (!(coro->cctx->flags & CC_TRACE))
1833 croak ("cannot enable tracing on coroutine with custom stack, caught");
1834
1835 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1836 }
1837 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1838 {
1839 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1840
1841 if (coro->flags & CF_RUNNING)
1842 PL_runops = RUNOPS_DEFAULT;
1843 else
1844 coro->slot->runops = RUNOPS_DEFAULT;
1845 }
1846}
1847
1848static void
1849coro_call_on_destroy (pTHX_ struct coro *coro)
1850{
1851 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1852 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1853
1854 if (on_destroyp)
1855 {
1856 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1857
1858 while (AvFILLp (on_destroy) >= 0)
1859 {
1860 dSP; /* don't disturb outer sp */
1861 SV *cb = av_pop (on_destroy);
1862
1863 PUSHMARK (SP);
1864
1865 if (statusp)
1866 {
1867 int i;
1868 AV *status = (AV *)SvRV (*statusp);
1869 EXTEND (SP, AvFILLp (status) + 1);
1870
1871 for (i = 0; i <= AvFILLp (status); ++i)
1872 PUSHs (AvARRAY (status)[i]);
1873 }
1874
1875 PUTBACK;
1876 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1877 }
1878 }
1879}
1880
1881static void
1882slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1883{
1884 int i;
1885 HV *hv = (HV *)SvRV (coro_current);
1886 AV *av = newAV ();
1887
1888 av_extend (av, items - 1);
1889 for (i = 0; i < items; ++i)
1890 av_push (av, SvREFCNT_inc_NN (arg [i]));
1891
1892 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1893
1894 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1895 api_ready (aTHX_ sv_manager);
1896
1897 frame->prepare = prepare_schedule;
1898 frame->check = slf_check_repeat;
1899
1900 /* as a minor optimisation, we could unwind all stacks here */
1901 /* but that puts extra pressure on pp_slf, and is not worth much */
1902 /*coro_unwind_stacks (aTHX);*/
1903}
1904
1905/*****************************************************************************/
1906/* async pool handler */
1907
1908static int
1909slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1910{
1911 HV *hv = (HV *)SvRV (coro_current);
1912 struct coro *coro = (struct coro *)frame->data;
1913
1914 if (!coro->invoke_cb)
1915 return 1; /* loop till we have invoke */
1916 else
1917 {
1918 hv_store (hv, "desc", sizeof ("desc") - 1,
1919 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1920
1921 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1922
1923 {
1924 dSP;
1925 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1926 PUTBACK;
1927 }
1928
1929 SvREFCNT_dec (GvAV (PL_defgv));
1930 GvAV (PL_defgv) = coro->invoke_av;
1931 coro->invoke_av = 0;
1932
1933 return 0;
1934 }
1935}
1936
1937static void
1938slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1939{
1940 HV *hv = (HV *)SvRV (coro_current);
1941 struct coro *coro = SvSTATE_hv ((SV *)hv);
1942
1943 if (expect_true (coro->saved_deffh))
1944 {
1945 /* subsequent iteration */
1946 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1947 coro->saved_deffh = 0;
1948
1949 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1950 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1951 {
1952 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1953 coro->invoke_av = newAV ();
1954
1955 frame->prepare = prepare_nop;
1956 }
1957 else
1958 {
1959 av_clear (GvAV (PL_defgv));
1960 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1961
1962 coro->prio = 0;
1963
1964 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1965 api_trace (aTHX_ coro_current, 0);
1966
1967 frame->prepare = prepare_schedule;
1968 av_push (av_async_pool, SvREFCNT_inc (hv));
1969 }
1970 }
1971 else
1972 {
1973 /* first iteration, simply fall through */
1974 frame->prepare = prepare_nop;
1975 }
1976
1977 frame->check = slf_check_pool_handler;
1978 frame->data = (void *)coro;
1979}
1980
1981/*****************************************************************************/
1982/* rouse callback */
1983
1984#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1985
1986static void
1987coro_rouse_callback (pTHX_ CV *cv)
1988{
1989 dXSARGS;
1990 SV *data = (SV *)GENSUB_ARG;
1991
1992 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1993 {
1994 /* first call, set args */
1995 AV *av = newAV ();
1996 SV *coro = SvRV (data);
1997
1998 SvRV_set (data, (SV *)av);
1999 api_ready (aTHX_ coro);
2000 SvREFCNT_dec (coro);
2001
2002 /* better take a full copy of the arguments */
2003 while (items--)
2004 av_store (av, items, newSVsv (ST (items)));
2005 }
2006
2007 XSRETURN_EMPTY;
2008}
2009
2010static int
2011slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2012{
2013 SV *data = (SV *)frame->data;
2014
2015 if (CORO_THROW)
2016 return 0;
2017
2018 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2019 return 1;
2020
2021 /* now push all results on the stack */
2022 {
2023 dSP;
2024 AV *av = (AV *)SvRV (data);
2025 int i;
2026
2027 EXTEND (SP, AvFILLp (av) + 1);
2028 for (i = 0; i <= AvFILLp (av); ++i)
2029 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2030
2031 /* we have stolen the elements, so ste length to zero and free */
2032 AvFILLp (av) = -1;
2033 av_undef (av);
2034
2035 PUTBACK;
2036 }
2037
2038 return 0;
2039}
2040
2041static void
2042slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2043{
2044 SV *cb;
2045
2046 if (items)
2047 cb = arg [0];
2048 else
2049 {
2050 struct coro *coro = SvSTATE_current;
2051
2052 if (!coro->rouse_cb)
2053 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2054
2055 cb = sv_2mortal (coro->rouse_cb);
2056 coro->rouse_cb = 0;
2057 }
2058
2059 if (!SvROK (cb)
2060 || SvTYPE (SvRV (cb)) != SVt_PVCV
2061 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2062 croak ("Coro::rouse_wait called with illegal callback argument,");
2063
2064 {
2065 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2066 SV *data = (SV *)GENSUB_ARG;
2067
2068 frame->data = (void *)data;
2069 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2070 frame->check = slf_check_rouse_wait;
2071 }
2072}
2073
2074static SV *
2075coro_new_rouse_cb (pTHX)
2076{
2077 HV *hv = (HV *)SvRV (coro_current);
2078 struct coro *coro = SvSTATE_hv (hv);
2079 SV *data = newRV_inc ((SV *)hv);
2080 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2081
2082 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2083 SvREFCNT_dec (data); /* magicext increases the refcount */
2084
2085 SvREFCNT_dec (coro->rouse_cb);
2086 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2087
2088 return cb;
2089}
2090
2091/*****************************************************************************/
2092/* schedule-like-function opcode (SLF) */
2093
2094static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2095static const CV *slf_cv;
2096static SV **slf_argv;
2097static int slf_argc, slf_arga; /* count, allocated */
2098static I32 slf_ax; /* top of stack, for restore */
2099
2100/* this restores the stack in the case we patched the entersub, to */
2101/* recreate the stack frame as perl will on following calls */
2102/* since entersub cleared the stack */
2103static OP *
2104pp_restore (pTHX)
2105{
2106 int i;
2107 SV **SP = PL_stack_base + slf_ax;
2108
2109 PUSHMARK (SP);
2110
2111 EXTEND (SP, slf_argc + 1);
2112
2113 for (i = 0; i < slf_argc; ++i)
2114 PUSHs (sv_2mortal (slf_argv [i]));
2115
2116 PUSHs ((SV *)CvGV (slf_cv));
2117
2118 RETURNOP (slf_restore.op_first);
2119}
2120
2121static void
2122slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2123{
2124 SV **arg = (SV **)slf_frame.data;
2125
2126 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2127}
2128
2129static void
2130slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2131{
2132 if (items != 2)
2133 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2134
2135 frame->prepare = slf_prepare_transfer;
2136 frame->check = slf_check_nop;
2137 frame->data = (void *)arg; /* let's hope it will stay valid */
2138}
2139
2140static void
2141slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2142{
2143 frame->prepare = prepare_schedule;
2144 frame->check = slf_check_nop;
2145}
2146
2147static void
2148slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2149{
2150 struct coro *next = (struct coro *)slf_frame.data;
2151
2152 SvREFCNT_inc_NN (next->hv);
2153 prepare_schedule_to (aTHX_ ta, next);
2154}
2155
2156static void
2157slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2158{
2159 if (!items)
2160 croak ("Coro::schedule_to expects a coroutine argument, caught");
2161
2162 frame->data = (void *)SvSTATE (arg [0]);
2163 frame->prepare = slf_prepare_schedule_to;
2164 frame->check = slf_check_nop;
2165}
2166
2167static void
2168slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2169{
2170 api_ready (aTHX_ SvRV (coro_current));
2171
2172 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2173}
2174
2175static void
2176slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2177{
2178 frame->prepare = prepare_cede;
2179 frame->check = slf_check_nop;
2180}
2181
2182static void
2183slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 frame->prepare = prepare_cede_notself;
2186 frame->check = slf_check_nop;
2187}
2188
2189/*
2190 * these not obviously related functions are all rolled into one
2191 * function to increase chances that they all will call transfer with the same
2192 * stack offset
2193 * SLF stands for "schedule-like-function".
2194 */
2195static OP *
2196pp_slf (pTHX)
2197{
2198 I32 checkmark; /* mark SP to see how many elements check has pushed */
2199
2200 /* set up the slf frame, unless it has already been set-up */
2201 /* the latter happens when a new coro has been started */
2202 /* or when a new cctx was attached to an existing coroutine */
2203 if (expect_true (!slf_frame.prepare))
2204 {
2205 /* first iteration */
2206 dSP;
2207 SV **arg = PL_stack_base + TOPMARK + 1;
2208 int items = SP - arg; /* args without function object */
2209 SV *gv = *sp;
2210
2211 /* do a quick consistency check on the "function" object, and if it isn't */
2212 /* for us, divert to the real entersub */
2213 if (SvTYPE (gv) != SVt_PVGV
2214 || !GvCV (gv)
2215 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2216 return PL_ppaddr[OP_ENTERSUB](aTHX);
2217
2218 if (!(PL_op->op_flags & OPf_STACKED))
2219 {
2220 /* ampersand-form of call, use @_ instead of stack */
2221 AV *av = GvAV (PL_defgv);
2222 arg = AvARRAY (av);
2223 items = AvFILLp (av) + 1;
2224 }
2225
2226 /* now call the init function, which needs to set up slf_frame */
2227 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2228 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2229
2230 /* pop args */
2231 SP = PL_stack_base + POPMARK;
2232
2233 PUTBACK;
2234 }
2235
2236 /* now that we have a slf_frame, interpret it! */
2237 /* we use a callback system not to make the code needlessly */
2238 /* complicated, but so we can run multiple perl coros from one cctx */
2239
2240 do
2241 {
2242 struct coro_transfer_args ta;
2243
2244 slf_frame.prepare (aTHX_ &ta);
2245 TRANSFER (ta, 0);
2246
2247 checkmark = PL_stack_sp - PL_stack_base;
2248 }
2249 while (slf_frame.check (aTHX_ &slf_frame));
2250
2251 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2252
2253 /* exception handling */
2254 if (expect_false (CORO_THROW))
2255 {
2256 SV *exception = sv_2mortal (CORO_THROW);
2257
2258 CORO_THROW = 0;
2259 sv_setsv (ERRSV, exception);
2260 croak (0);
2261 }
2262
2263 /* return value handling - mostly like entersub */
2264 /* make sure we put something on the stack in scalar context */
2265 if (GIMME_V == G_SCALAR)
2266 {
2267 dSP;
2268 SV **bot = PL_stack_base + checkmark;
2269
2270 if (sp == bot) /* too few, push undef */
2271 bot [1] = &PL_sv_undef;
2272 else if (sp != bot + 1) /* too many, take last one */
2273 bot [1] = *sp;
2274
2275 SP = bot + 1;
2276
2277 PUTBACK;
2278 }
2279
2280 return NORMAL;
2281}
2282
2283static void
2284api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2285{
2286 int i;
2287 SV **arg = PL_stack_base + ax;
2288 int items = PL_stack_sp - arg + 1;
2289
2290 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2291
2292 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2293 && PL_op->op_ppaddr != pp_slf)
2294 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2295
2296 CvFLAGS (cv) |= CVf_SLF;
2297 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2298 slf_cv = cv;
2299
2300 /* we patch the op, and then re-run the whole call */
2301 /* we have to put the same argument on the stack for this to work */
2302 /* and this will be done by pp_restore */
2303 slf_restore.op_next = (OP *)&slf_restore;
2304 slf_restore.op_type = OP_CUSTOM;
2305 slf_restore.op_ppaddr = pp_restore;
2306 slf_restore.op_first = PL_op;
2307
2308 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2309
2310 if (PL_op->op_flags & OPf_STACKED)
2311 {
2312 if (items > slf_arga)
2313 {
2314 slf_arga = items;
2315 free (slf_argv);
2316 slf_argv = malloc (slf_arga * sizeof (SV *));
2317 }
2318
2319 slf_argc = items;
2320
2321 for (i = 0; i < items; ++i)
2322 slf_argv [i] = SvREFCNT_inc (arg [i]);
2323 }
2324 else
2325 slf_argc = 0;
2326
2327 PL_op->op_ppaddr = pp_slf;
2328 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2329
2330 PL_op = (OP *)&slf_restore;
2331}
2332
2333/*****************************************************************************/
2334/* dynamic wind */
2335
2336static void
2337on_enterleave_call (pTHX_ SV *cb)
2338{
2339 dSP;
2340
2341 PUSHSTACK;
2342
2343 PUSHMARK (SP);
2344 PUTBACK;
2345 call_sv (cb, G_VOID | G_DISCARD);
2346 SPAGAIN;
2347
2348 POPSTACK;
2349}
2350
2351static SV *
2352coro_avp_pop_and_free (AV **avp)
2353{
2354 AV *av = *avp;
2355 SV *res = av_pop (av);
2356
2357 if (AvFILLp (av) < 0)
2358 {
2359 *avp = 0;
2360 SvREFCNT_dec (av);
2361 }
2362
2363 return res;
2364}
2365
2366static void
2367coro_pop_on_enter (pTHX_ void *coro)
2368{
2369 SV *cb = coro_avp_pop_and_free (&((struct coro *)coro)->on_enter);
2370 SvREFCNT_dec (cb);
2371}
2372
2373static void
2374coro_pop_on_leave (pTHX_ void *coro)
2375{
2376 SV *cb = coro_avp_pop_and_free (&((struct coro *)coro)->on_leave);
2377 on_enterleave_call (sv_2mortal (cb));
2378}
2379
2380/*****************************************************************************/
2381/* PerlIO::cede */
2382
2383typedef struct
2384{
2385 PerlIOBuf base;
2386 NV next, every;
2387} PerlIOCede;
2388
2389static IV
2390PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2391{
2392 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2393
2394 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2395 self->next = nvtime () + self->every;
2396
2397 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2398}
2399
2400static SV *
2401PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2402{
2403 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2404
2405 return newSVnv (self->every);
2406}
2407
2408static IV
2409PerlIOCede_flush (pTHX_ PerlIO *f)
2410{
2411 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2412 double now = nvtime ();
2413
2414 if (now >= self->next)
2415 {
2416 api_cede (aTHX);
2417 self->next = now + self->every;
2418 }
2419
2420 return PerlIOBuf_flush (aTHX_ f);
2421}
2422
2423static PerlIO_funcs PerlIO_cede =
2424{
2425 sizeof(PerlIO_funcs),
2426 "cede",
2427 sizeof(PerlIOCede),
2428 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2429 PerlIOCede_pushed,
2430 PerlIOBuf_popped,
2431 PerlIOBuf_open,
2432 PerlIOBase_binmode,
2433 PerlIOCede_getarg,
2434 PerlIOBase_fileno,
2435 PerlIOBuf_dup,
2436 PerlIOBuf_read,
2437 PerlIOBuf_unread,
2438 PerlIOBuf_write,
2439 PerlIOBuf_seek,
2440 PerlIOBuf_tell,
2441 PerlIOBuf_close,
2442 PerlIOCede_flush,
2443 PerlIOBuf_fill,
2444 PerlIOBase_eof,
2445 PerlIOBase_error,
2446 PerlIOBase_clearerr,
2447 PerlIOBase_setlinebuf,
2448 PerlIOBuf_get_base,
2449 PerlIOBuf_bufsiz,
2450 PerlIOBuf_get_ptr,
2451 PerlIOBuf_get_cnt,
2452 PerlIOBuf_set_ptrcnt,
2453};
2454
2455/*****************************************************************************/
2456/* Coro::Semaphore & Coro::Signal */
2457
2458static SV *
2459coro_waitarray_new (pTHX_ int count)
2460{
2461 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2462 AV *av = newAV ();
2463 SV **ary;
2464
2465 /* unfortunately, building manually saves memory */
2466 Newx (ary, 2, SV *);
2467 AvALLOC (av) = ary;
2468#if PERL_VERSION_ATLEAST (5,10,0)
2469 AvARRAY (av) = ary;
2470#else
2471 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2472 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2473 SvPVX ((SV *)av) = (char *)ary;
2474#endif
2475 AvMAX (av) = 1;
2476 AvFILLp (av) = 0;
2477 ary [0] = newSViv (count);
2478
2479 return newRV_noinc ((SV *)av);
2480}
2481
2482/* semaphore */
2483
2484static void
2485coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2486{
2487 SV *count_sv = AvARRAY (av)[0];
2488 IV count = SvIVX (count_sv);
2489
2490 count += adjust;
2491 SvIVX (count_sv) = count;
2492
2493 /* now wake up as many waiters as are expected to lock */
2494 while (count > 0 && AvFILLp (av) > 0)
2495 {
2496 SV *cb;
2497
2498 /* swap first two elements so we can shift a waiter */
2499 AvARRAY (av)[0] = AvARRAY (av)[1];
2500 AvARRAY (av)[1] = count_sv;
2501 cb = av_shift (av);
2502
2503 if (SvOBJECT (cb))
2504 {
2505 api_ready (aTHX_ cb);
2506 --count;
2507 }
2508 else if (SvTYPE (cb) == SVt_PVCV)
1049 { 2509 {
1050 dSP; 2510 dSP;
1051 UNLOCK;
1052
1053 ENTER;
1054 SAVETMPS;
1055
1056 PUSHMARK (SP); 2511 PUSHMARK (SP);
2512 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1057 PUTBACK; 2513 PUTBACK;
1058 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2514 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1059
1060 FREETMPS;
1061 LEAVE;
1062 continue;
1063 } 2515 }
1064 2516
1065 ta->next = SvSTATE (next_sv); 2517 SvREFCNT_dec (cb);
2518 }
2519}
1066 2520
1067 /* cannot transfer to destroyed coros, skip and look for next */ 2521static void
1068 if (ta->next->flags & CF_DESTROYED) 2522coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2523{
2524 /* call $sem->adjust (0) to possibly wake up some other waiters */
2525 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2526}
2527
2528static int
2529slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2530{
2531 AV *av = (AV *)frame->data;
2532 SV *count_sv = AvARRAY (av)[0];
2533
2534 /* if we are about to throw, don't actually acquire the lock, just throw */
2535 if (CORO_THROW)
2536 return 0;
2537 else if (SvIVX (count_sv) > 0)
2538 {
2539 SvSTATE_current->on_destroy = 0;
2540
2541 if (acquire)
2542 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2543 else
2544 coro_semaphore_adjust (aTHX_ av, 0);
2545
2546 return 0;
2547 }
2548 else
2549 {
2550 int i;
2551 /* if we were woken up but can't down, we look through the whole */
2552 /* waiters list and only add us if we aren't in there already */
2553 /* this avoids some degenerate memory usage cases */
2554
2555 for (i = 1; i <= AvFILLp (av); ++i)
2556 if (AvARRAY (av)[i] == SvRV (coro_current))
2557 return 1;
2558
2559 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2560 return 1;
2561 }
2562}
2563
2564static int
2565slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2566{
2567 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2568}
2569
2570static int
2571slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2572{
2573 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2574}
2575
2576static void
2577slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2578{
2579 AV *av = (AV *)SvRV (arg [0]);
2580
2581 if (SvIVX (AvARRAY (av)[0]) > 0)
2582 {
2583 frame->data = (void *)av;
2584 frame->prepare = prepare_nop;
2585 }
2586 else
2587 {
2588 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2589
2590 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2591 frame->prepare = prepare_schedule;
2592
2593 /* to avoid race conditions when a woken-up coro gets terminated */
2594 /* we arrange for a temporary on_destroy that calls adjust (0) */
2595 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2596 }
2597}
2598
2599static void
2600slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2601{
2602 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2603 frame->check = slf_check_semaphore_down;
2604}
2605
2606static void
2607slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2608{
2609 if (items >= 2)
2610 {
2611 /* callback form */
2612 AV *av = (AV *)SvRV (arg [0]);
2613 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2614
2615 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2616
2617 if (SvIVX (AvARRAY (av)[0]) > 0)
2618 coro_semaphore_adjust (aTHX_ av, 0);
2619
2620 frame->prepare = prepare_nop;
2621 frame->check = slf_check_nop;
2622 }
2623 else
2624 {
2625 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2626 frame->check = slf_check_semaphore_wait;
2627 }
2628}
2629
2630/* signal */
2631
2632static void
2633coro_signal_wake (pTHX_ AV *av, int count)
2634{
2635 SvIVX (AvARRAY (av)[0]) = 0;
2636
2637 /* now signal count waiters */
2638 while (count > 0 && AvFILLp (av) > 0)
2639 {
2640 SV *cb;
2641
2642 /* swap first two elements so we can shift a waiter */
2643 cb = AvARRAY (av)[0];
2644 AvARRAY (av)[0] = AvARRAY (av)[1];
2645 AvARRAY (av)[1] = cb;
2646
2647 cb = av_shift (av);
2648
2649 api_ready (aTHX_ cb);
2650 sv_setiv (cb, 0); /* signal waiter */
2651 SvREFCNT_dec (cb);
2652
2653 --count;
2654 }
2655}
2656
2657static int
2658slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2659{
2660 /* if we are about to throw, also stop waiting */
2661 return SvROK ((SV *)frame->data) && !CORO_THROW;
2662}
2663
2664static void
2665slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2666{
2667 AV *av = (AV *)SvRV (arg [0]);
2668
2669 if (SvIVX (AvARRAY (av)[0]))
2670 {
2671 SvIVX (AvARRAY (av)[0]) = 0;
2672 frame->prepare = prepare_nop;
2673 frame->check = slf_check_nop;
2674 }
2675 else
2676 {
2677 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2678
2679 av_push (av, waiter);
2680
2681 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2682 frame->prepare = prepare_schedule;
2683 frame->check = slf_check_signal_wait;
2684 }
2685}
2686
2687/*****************************************************************************/
2688/* Coro::AIO */
2689
2690#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2691
2692/* helper storage struct */
2693struct io_state
2694{
2695 int errorno;
2696 I32 laststype; /* U16 in 5.10.0 */
2697 int laststatval;
2698 Stat_t statcache;
2699};
2700
2701static void
2702coro_aio_callback (pTHX_ CV *cv)
2703{
2704 dXSARGS;
2705 AV *state = (AV *)GENSUB_ARG;
2706 SV *coro = av_pop (state);
2707 SV *data_sv = newSV (sizeof (struct io_state));
2708
2709 av_extend (state, items - 1);
2710
2711 sv_upgrade (data_sv, SVt_PV);
2712 SvCUR_set (data_sv, sizeof (struct io_state));
2713 SvPOK_only (data_sv);
2714
2715 {
2716 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2717
2718 data->errorno = errno;
2719 data->laststype = PL_laststype;
2720 data->laststatval = PL_laststatval;
2721 data->statcache = PL_statcache;
2722 }
2723
2724 /* now build the result vector out of all the parameters and the data_sv */
2725 {
2726 int i;
2727
2728 for (i = 0; i < items; ++i)
2729 av_push (state, SvREFCNT_inc_NN (ST (i)));
2730 }
2731
2732 av_push (state, data_sv);
2733
2734 api_ready (aTHX_ coro);
2735 SvREFCNT_dec (coro);
2736 SvREFCNT_dec ((AV *)state);
2737}
2738
2739static int
2740slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2741{
2742 AV *state = (AV *)frame->data;
2743
2744 /* if we are about to throw, return early */
2745 /* this does not cancel the aio request, but at least */
2746 /* it quickly returns */
2747 if (CORO_THROW)
2748 return 0;
2749
2750 /* one element that is an RV? repeat! */
2751 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2752 return 1;
2753
2754 /* restore status */
2755 {
2756 SV *data_sv = av_pop (state);
2757 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2758
2759 errno = data->errorno;
2760 PL_laststype = data->laststype;
2761 PL_laststatval = data->laststatval;
2762 PL_statcache = data->statcache;
2763
2764 SvREFCNT_dec (data_sv);
2765 }
2766
2767 /* push result values */
2768 {
2769 dSP;
2770 int i;
2771
2772 EXTEND (SP, AvFILLp (state) + 1);
2773 for (i = 0; i <= AvFILLp (state); ++i)
2774 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2775
2776 PUTBACK;
2777 }
2778
2779 return 0;
2780}
2781
2782static void
2783slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2784{
2785 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2786 SV *coro_hv = SvRV (coro_current);
2787 struct coro *coro = SvSTATE_hv (coro_hv);
2788
2789 /* put our coroutine id on the state arg */
2790 av_push (state, SvREFCNT_inc_NN (coro_hv));
2791
2792 /* first see whether we have a non-zero priority and set it as AIO prio */
2793 if (coro->prio)
2794 {
2795 dSP;
2796
2797 static SV *prio_cv;
2798 static SV *prio_sv;
2799
2800 if (expect_false (!prio_cv))
1069 { 2801 {
1070 UNLOCK; 2802 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1071 SvREFCNT_dec (next_sv); 2803 prio_sv = newSViv (0);
1072 /* coro_nready is already taken care of by destroy */
1073 continue;
1074 } 2804 }
1075 2805
1076 --coro_nready; 2806 PUSHMARK (SP);
1077 UNLOCK; 2807 sv_setiv (prio_sv, coro->prio);
1078 break; 2808 XPUSHs (prio_sv);
1079 }
1080 2809
1081 /* free this only after the transfer */ 2810 PUTBACK;
1082 prev_sv = SvRV (coro_current); 2811 call_sv (prio_cv, G_VOID | G_DISCARD);
1083 SvRV_set (coro_current, next_sv);
1084 ta->prev = SvSTATE (prev_sv);
1085
1086 assert (ta->next->flags & CF_READY);
1087 ta->next->flags &= ~CF_READY;
1088
1089 LOCK;
1090 free_coro_mortal (aTHX);
1091 coro_mortal = prev_sv;
1092 UNLOCK;
1093}
1094
1095static void
1096prepare_cede (pTHX_ struct transfer_args *ta)
1097{
1098 api_ready (coro_current);
1099 prepare_schedule (aTHX_ ta);
1100}
1101
1102static int
1103prepare_cede_notself (pTHX_ struct transfer_args *ta)
1104{
1105 if (coro_nready)
1106 { 2812 }
1107 SV *prev = SvRV (coro_current); 2813
1108 prepare_schedule (aTHX_ ta); 2814 /* now call the original request */
1109 api_ready (prev); 2815 {
1110 return 1; 2816 dSP;
2817 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2818 int i;
2819
2820 PUSHMARK (SP);
2821
2822 /* first push all args to the stack */
2823 EXTEND (SP, items + 1);
2824
2825 for (i = 0; i < items; ++i)
2826 PUSHs (arg [i]);
2827
2828 /* now push the callback closure */
2829 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2830
2831 /* now call the AIO function - we assume our request is uncancelable */
2832 PUTBACK;
2833 call_sv ((SV *)req, G_VOID | G_DISCARD);
1111 } 2834 }
1112 else
1113 return 0;
1114}
1115 2835
1116static void 2836 /* now that the requets is going, we loop toll we have a result */
1117api_schedule (void) 2837 frame->data = (void *)state;
1118{ 2838 frame->prepare = prepare_schedule;
1119 dTHX; 2839 frame->check = slf_check_aio_req;
1120 struct transfer_args ta;
1121
1122 prepare_schedule (aTHX_ &ta);
1123 TRANSFER (ta);
1124} 2840}
1125 2841
1126static int 2842static void
1127api_cede (void) 2843coro_aio_req_xs (pTHX_ CV *cv)
1128{ 2844{
1129 dTHX; 2845 dXSARGS;
1130 struct transfer_args ta;
1131 2846
1132 prepare_cede (aTHX_ &ta); 2847 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1133 2848
1134 if (ta.prev != ta.next) 2849 XSRETURN_EMPTY;
1135 {
1136 TRANSFER (ta);
1137 return 1;
1138 }
1139 else
1140 return 0;
1141} 2850}
1142 2851
1143static int 2852/*****************************************************************************/
1144api_cede_notself (void)
1145{
1146 dTHX;
1147 struct transfer_args ta;
1148 2853
1149 if (prepare_cede_notself (aTHX_ &ta)) 2854#if CORO_CLONE
1150 { 2855# include "clone.c"
1151 TRANSFER (ta); 2856#endif
1152 return 1;
1153 }
1154 else
1155 return 0;
1156}
1157 2857
1158MODULE = Coro::State PACKAGE = Coro::State 2858MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1159 2859
1160PROTOTYPES: DISABLE 2860PROTOTYPES: DISABLE
1161 2861
1162BOOT: 2862BOOT:
1163{ 2863{
1164#ifdef USE_ITHREADS 2864#ifdef USE_ITHREADS
1165 MUTEX_INIT (&coro_mutex); 2865# if CORO_PTHREAD
2866 coro_thx = PERL_GET_CONTEXT;
2867# endif
1166#endif 2868#endif
1167 BOOT_PAGESIZE; 2869 BOOT_PAGESIZE;
1168 2870
2871 cctx_current = cctx_new_empty ();
2872
2873 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2874 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2875
2876 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2877 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2878 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2879
2880 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2881 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2882 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2883
1169 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2884 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1170 2885
1171 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2886 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1172 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV)); 2887 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1173 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1174 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1175 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1176 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF)); 2888 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1177 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2889 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1178 2890
1179 main_mainstack = PL_mainstack; 2891 main_mainstack = PL_mainstack;
2892 main_top_env = PL_top_env;
1180 2893
2894 while (main_top_env->je_prev)
2895 main_top_env = main_top_env->je_prev;
2896
2897 {
2898 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2899
2900 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2901 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2902
2903 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2904 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2905 }
2906
1181 coroapi.ver = CORO_API_VERSION; 2907 coroapi.ver = CORO_API_VERSION;
2908 coroapi.rev = CORO_API_REVISION;
2909
1182 coroapi.transfer = api_transfer; 2910 coroapi.transfer = api_transfer;
2911
2912 coroapi.sv_state = SvSTATE_;
2913 coroapi.execute_slf = api_execute_slf;
2914 coroapi.prepare_nop = prepare_nop;
2915 coroapi.prepare_schedule = prepare_schedule;
2916 coroapi.prepare_cede = prepare_cede;
2917 coroapi.prepare_cede_notself = prepare_cede_notself;
2918
2919 {
2920 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2921
2922 if (!svp) croak ("Time::HiRes is required");
2923 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2924
2925 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2926 }
1183 2927
1184 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2928 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1185} 2929}
1186 2930
1187SV * 2931SV *
1188new (char *klass, ...) 2932new (char *klass, ...)
2933 ALIAS:
2934 Coro::new = 1
1189 CODE: 2935 CODE:
1190{ 2936{
1191 struct coro *coro; 2937 struct coro *coro;
2938 MAGIC *mg;
1192 HV *hv; 2939 HV *hv;
2940 CV *cb;
1193 int i; 2941 int i;
1194 2942
2943 if (items > 1)
2944 {
2945 cb = coro_sv_2cv (aTHX_ ST (1));
2946
2947 if (!ix)
2948 {
2949 if (CvISXSUB (cb))
2950 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2951
2952 if (!CvROOT (cb))
2953 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2954 }
2955 }
2956
1195 Newz (0, coro, 1, struct coro); 2957 Newz (0, coro, 1, struct coro);
1196 coro->args = newAV (); 2958 coro->args = newAV ();
1197 coro->save = CORO_SAVE_DEF;
1198 coro->flags = CF_NEW; 2959 coro->flags = CF_NEW;
1199 2960
2961 if (coro_first) coro_first->prev = coro;
2962 coro->next = coro_first;
2963 coro_first = coro;
2964
1200 hv = newHV (); 2965 coro->hv = hv = newHV ();
1201 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2966 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2967 mg->mg_flags |= MGf_DUP;
1202 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2968 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1203 2969
2970 if (items > 1)
2971 {
2972 av_extend (coro->args, items - 1 + ix - 1);
2973
2974 if (ix)
2975 {
2976 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2977 cb = cv_coro_run;
2978 }
2979
2980 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2981
1204 for (i = 1; i < items; i++) 2982 for (i = 2; i < items; i++)
1205 av_push (coro->args, newSVsv (ST (i))); 2983 av_push (coro->args, newSVsv (ST (i)));
2984 }
1206} 2985}
1207 OUTPUT: 2986 OUTPUT:
1208 RETVAL 2987 RETVAL
1209 2988
1210int 2989void
1211save (SV *coro, int new_save = -1) 2990transfer (...)
2991 PROTOTYPE: $$
1212 CODE: 2992 CODE:
1213 RETVAL = api_save (coro, new_save); 2993 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1214 OUTPUT:
1215 RETVAL
1216
1217int
1218save_also (SV *coro_sv, int save_also)
1219 CODE:
1220{
1221 struct coro *coro = SvSTATE (coro_sv);
1222 RETVAL = coro->save;
1223 coro->save |= save_also;
1224}
1225 OUTPUT:
1226 RETVAL
1227
1228void
1229_set_stacklevel (...)
1230 ALIAS:
1231 Coro::State::transfer = 1
1232 Coro::schedule = 2
1233 Coro::cede = 3
1234 Coro::cede_notself = 4
1235 CODE:
1236{
1237 struct transfer_args ta;
1238
1239 switch (ix)
1240 {
1241 case 0:
1242 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1243 ta.next = 0;
1244 break;
1245
1246 case 1:
1247 if (items != 2)
1248 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1249
1250 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1251 break;
1252
1253 case 2:
1254 prepare_schedule (aTHX_ &ta);
1255 break;
1256
1257 case 3:
1258 prepare_cede (aTHX_ &ta);
1259 break;
1260
1261 case 4:
1262 if (!prepare_cede_notself (aTHX_ &ta))
1263 XSRETURN_EMPTY;
1264
1265 break;
1266 }
1267
1268 BARRIER;
1269 TRANSFER (ta);
1270
1271 if (GIMME_V != G_VOID && ta.next != ta.prev)
1272 XSRETURN_YES;
1273}
1274 2994
1275bool 2995bool
1276_destroy (SV *coro_sv) 2996_destroy (SV *coro_sv)
1277 CODE: 2997 CODE:
1278 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2998 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1279 OUTPUT: 2999 OUTPUT:
1280 RETVAL 3000 RETVAL
1281 3001
1282void 3002void
1283_exit (code) 3003_exit (int code)
1284 int code
1285 PROTOTYPE: $ 3004 PROTOTYPE: $
1286 CODE: 3005 CODE:
1287 _exit (code); 3006 _exit (code);
1288 3007
3008SV *
3009clone (Coro::State coro)
3010 CODE:
3011{
3012#if CORO_CLONE
3013 struct coro *ncoro = coro_clone (aTHX_ coro);
3014 MAGIC *mg;
3015 /* TODO: too much duplication */
3016 ncoro->hv = newHV ();
3017 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3018 mg->mg_flags |= MGf_DUP;
3019 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3020#else
3021 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3022#endif
3023}
3024 OUTPUT:
3025 RETVAL
3026
1289int 3027int
1290cctx_stacksize (int new_stacksize = 0) 3028cctx_stacksize (int new_stacksize = 0)
3029 PROTOTYPE: ;$
1291 CODE: 3030 CODE:
1292 RETVAL = coro_stacksize; 3031 RETVAL = cctx_stacksize;
1293 if (new_stacksize) 3032 if (new_stacksize)
3033 {
1294 coro_stacksize = new_stacksize; 3034 cctx_stacksize = new_stacksize;
3035 ++cctx_gen;
3036 }
1295 OUTPUT: 3037 OUTPUT:
1296 RETVAL 3038 RETVAL
1297 3039
1298int 3040int
3041cctx_max_idle (int max_idle = 0)
3042 PROTOTYPE: ;$
3043 CODE:
3044 RETVAL = cctx_max_idle;
3045 if (max_idle > 1)
3046 cctx_max_idle = max_idle;
3047 OUTPUT:
3048 RETVAL
3049
3050int
1299cctx_count () 3051cctx_count ()
3052 PROTOTYPE:
1300 CODE: 3053 CODE:
1301 RETVAL = cctx_count; 3054 RETVAL = cctx_count;
1302 OUTPUT: 3055 OUTPUT:
1303 RETVAL 3056 RETVAL
1304 3057
1305int 3058int
1306cctx_idle () 3059cctx_idle ()
3060 PROTOTYPE:
1307 CODE: 3061 CODE:
1308 RETVAL = cctx_idle; 3062 RETVAL = cctx_idle;
1309 OUTPUT: 3063 OUTPUT:
1310 RETVAL 3064 RETVAL
1311 3065
3066void
3067list ()
3068 PROTOTYPE:
3069 PPCODE:
3070{
3071 struct coro *coro;
3072 for (coro = coro_first; coro; coro = coro->next)
3073 if (coro->hv)
3074 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3075}
3076
3077void
3078call (Coro::State coro, SV *coderef)
3079 ALIAS:
3080 eval = 1
3081 CODE:
3082{
3083 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3084 {
3085 struct coro *current = SvSTATE_current;
3086
3087 if (current != coro)
3088 {
3089 PUTBACK;
3090 save_perl (aTHX_ current);
3091 load_perl (aTHX_ coro);
3092 SPAGAIN;
3093 }
3094
3095 PUSHSTACK;
3096
3097 PUSHMARK (SP);
3098 PUTBACK;
3099
3100 if (ix)
3101 eval_sv (coderef, 0);
3102 else
3103 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3104
3105 SPAGAIN;
3106 POPSTACK;
3107
3108 if (current != coro)
3109 {
3110 PUTBACK;
3111 save_perl (aTHX_ coro);
3112 load_perl (aTHX_ current);
3113 SPAGAIN;
3114 }
3115 }
3116}
3117
3118SV *
3119is_ready (Coro::State coro)
3120 PROTOTYPE: $
3121 ALIAS:
3122 is_ready = CF_READY
3123 is_running = CF_RUNNING
3124 is_new = CF_NEW
3125 is_destroyed = CF_DESTROYED
3126 CODE:
3127 RETVAL = boolSV (coro->flags & ix);
3128 OUTPUT:
3129 RETVAL
3130
3131void
3132throw (Coro::State self, SV *throw = &PL_sv_undef)
3133 PROTOTYPE: $;$
3134 CODE:
3135{
3136 struct coro *current = SvSTATE_current;
3137 SV **throwp = self == current ? &CORO_THROW : &self->except;
3138 SvREFCNT_dec (*throwp);
3139 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3140}
3141
3142void
3143api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3144 PROTOTYPE: $;$
3145 C_ARGS: aTHX_ coro, flags
3146
3147SV *
3148has_cctx (Coro::State coro)
3149 PROTOTYPE: $
3150 CODE:
3151 /* maybe manage the running flag differently */
3152 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3153 OUTPUT:
3154 RETVAL
3155
3156int
3157is_traced (Coro::State coro)
3158 PROTOTYPE: $
3159 CODE:
3160 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3161 OUTPUT:
3162 RETVAL
3163
3164UV
3165rss (Coro::State coro)
3166 PROTOTYPE: $
3167 ALIAS:
3168 usecount = 1
3169 CODE:
3170 switch (ix)
3171 {
3172 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3173 case 1: RETVAL = coro->usecount; break;
3174 }
3175 OUTPUT:
3176 RETVAL
3177
3178void
3179force_cctx ()
3180 PROTOTYPE:
3181 CODE:
3182 cctx_current->idle_sp = 0;
3183
3184void
3185swap_defsv (Coro::State self)
3186 PROTOTYPE: $
3187 ALIAS:
3188 swap_defav = 1
3189 CODE:
3190 if (!self->slot)
3191 croak ("cannot swap state with coroutine that has no saved state,");
3192 else
3193 {
3194 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3195 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3196
3197 SV *tmp = *src; *src = *dst; *dst = tmp;
3198 }
3199
3200
1312MODULE = Coro::State PACKAGE = Coro 3201MODULE = Coro::State PACKAGE = Coro
1313 3202
1314BOOT: 3203BOOT:
1315{ 3204{
1316 int i; 3205 int i;
1317 3206
3207 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3208 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3209 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3210 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3211 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3212 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3213 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3214 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3215 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3216
3217 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3218 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3219 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3220 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3221
1318 coro_stash = gv_stashpv ("Coro", TRUE); 3222 coro_stash = gv_stashpv ("Coro", TRUE);
1319 3223
1320 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3224 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1321 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3225 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1322 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3226 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1323 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3227 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1324 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3228 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1325 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3229 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1326 3230
1327 coro_current = get_sv ("Coro::current", FALSE);
1328 SvREADONLY_on (coro_current);
1329
1330 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3231 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1331 coro_ready[i] = newAV (); 3232 coro_ready[i] = newAV ();
1332 3233
1333 { 3234 {
1334 SV *sv = perl_get_sv("Coro::API", 1); 3235 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1335 3236
1336 coroapi.schedule = api_schedule; 3237 coroapi.schedule = api_schedule;
1337 coroapi.save = api_save; 3238 coroapi.schedule_to = api_schedule_to;
1338 coroapi.cede = api_cede; 3239 coroapi.cede = api_cede;
1339 coroapi.cede_notself = api_cede_notself; 3240 coroapi.cede_notself = api_cede_notself;
1340 coroapi.ready = api_ready; 3241 coroapi.ready = api_ready;
1341 coroapi.is_ready = api_is_ready; 3242 coroapi.is_ready = api_is_ready;
1342 coroapi.nready = &coro_nready; 3243 coroapi.nready = coro_nready;
1343 coroapi.current = coro_current; 3244 coroapi.current = coro_current;
1344 3245
1345 GCoroAPI = &coroapi; 3246 /*GCoroAPI = &coroapi;*/
1346 sv_setiv (sv, (IV)&coroapi); 3247 sv_setiv (sv, (IV)&coroapi);
1347 SvREADONLY_on (sv); 3248 SvREADONLY_on (sv);
1348 } 3249 }
1349} 3250}
3251
3252void
3253terminate (...)
3254 CODE:
3255 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3256
3257void
3258schedule (...)
3259 CODE:
3260 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3261
3262void
3263schedule_to (...)
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3266
3267void
3268cede_to (...)
3269 CODE:
3270 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3271
3272void
3273cede (...)
3274 CODE:
3275 CORO_EXECUTE_SLF_XS (slf_init_cede);
3276
3277void
3278cede_notself (...)
3279 CODE:
3280 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3281
3282void
3283_cancel (Coro::State self)
3284 CODE:
3285 coro_state_destroy (aTHX_ self);
3286 coro_call_on_destroy (aTHX_ self);
1350 3287
1351void 3288void
1352_set_current (SV *current) 3289_set_current (SV *current)
1353 PROTOTYPE: $ 3290 PROTOTYPE: $
1354 CODE: 3291 CODE:
1355 SvREFCNT_dec (SvRV (coro_current)); 3292 SvREFCNT_dec (SvRV (coro_current));
1356 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3293 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3294
3295void
3296_set_readyhook (SV *hook)
3297 PROTOTYPE: $
3298 CODE:
3299 SvREFCNT_dec (coro_readyhook);
3300 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1357 3301
1358int 3302int
1359prio (Coro::State coro, int newprio = 0) 3303prio (Coro::State coro, int newprio = 0)
3304 PROTOTYPE: $;$
1360 ALIAS: 3305 ALIAS:
1361 nice = 1 3306 nice = 1
1362 CODE: 3307 CODE:
1363{ 3308{
1364 RETVAL = coro->prio; 3309 RETVAL = coro->prio;
… …
1379 3324
1380SV * 3325SV *
1381ready (SV *self) 3326ready (SV *self)
1382 PROTOTYPE: $ 3327 PROTOTYPE: $
1383 CODE: 3328 CODE:
1384 RETVAL = boolSV (api_ready (self)); 3329 RETVAL = boolSV (api_ready (aTHX_ self));
1385 OUTPUT:
1386 RETVAL
1387
1388SV *
1389is_ready (SV *self)
1390 PROTOTYPE: $
1391 CODE:
1392 RETVAL = boolSV (api_is_ready (self));
1393 OUTPUT: 3330 OUTPUT:
1394 RETVAL 3331 RETVAL
1395 3332
1396int 3333int
1397nready (...) 3334nready (...)
… …
1399 CODE: 3336 CODE:
1400 RETVAL = coro_nready; 3337 RETVAL = coro_nready;
1401 OUTPUT: 3338 OUTPUT:
1402 RETVAL 3339 RETVAL
1403 3340
1404MODULE = Coro::State PACKAGE = Coro::AIO 3341void
3342_pool_handler (...)
3343 CODE:
3344 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3345
3346void
3347async_pool (SV *cv, ...)
3348 PROTOTYPE: &@
3349 PPCODE:
3350{
3351 HV *hv = (HV *)av_pop (av_async_pool);
3352 AV *av = newAV ();
3353 SV *cb = ST (0);
3354 int i;
3355
3356 av_extend (av, items - 2);
3357 for (i = 1; i < items; ++i)
3358 av_push (av, SvREFCNT_inc_NN (ST (i)));
3359
3360 if ((SV *)hv == &PL_sv_undef)
3361 {
3362 PUSHMARK (SP);
3363 EXTEND (SP, 2);
3364 PUSHs (sv_Coro);
3365 PUSHs ((SV *)cv_pool_handler);
3366 PUTBACK;
3367 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3368 SPAGAIN;
3369
3370 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3371 }
3372
3373 {
3374 struct coro *coro = SvSTATE_hv (hv);
3375
3376 assert (!coro->invoke_cb);
3377 assert (!coro->invoke_av);
3378 coro->invoke_cb = SvREFCNT_inc (cb);
3379 coro->invoke_av = av;
3380 }
3381
3382 api_ready (aTHX_ (SV *)hv);
3383
3384 if (GIMME_V != G_VOID)
3385 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3386 else
3387 SvREFCNT_dec (hv);
3388}
1405 3389
1406SV * 3390SV *
1407_get_state () 3391rouse_cb ()
3392 PROTOTYPE:
1408 CODE: 3393 CODE:
1409{ 3394 RETVAL = coro_new_rouse_cb (aTHX);
1410 struct io_state *data;
1411
1412 RETVAL = newSV (sizeof (struct io_state));
1413 data = (struct io_state *)SvPVX (RETVAL);
1414 SvCUR_set (RETVAL, sizeof (struct io_state));
1415 SvPOK_only (RETVAL);
1416
1417 data->errorno = errno;
1418 data->laststype = PL_laststype;
1419 data->laststatval = PL_laststatval;
1420 data->statcache = PL_statcache;
1421}
1422 OUTPUT: 3395 OUTPUT:
1423 RETVAL 3396 RETVAL
1424 3397
1425void 3398void
1426_set_state (char *data_) 3399rouse_wait (...)
3400 PROTOTYPE: ;$
3401 PPCODE:
3402 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3403
3404void
3405on_enter (SV *block)
3406 ALIAS:
3407 on_leave = 1
1427 PROTOTYPE: $ 3408 PROTOTYPE: &
1428 CODE: 3409 CODE:
1429{ 3410{
1430 struct io_state *data = (void *)data_; 3411 struct coro *coro = SvSTATE_current;
3412 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1431 3413
1432 errno = data->errorno; 3414 block = (SV *)coro_sv_2cv (block);
1433 PL_laststype = data->laststype;
1434 PL_laststatval = data->laststatval;
1435 PL_statcache = data->statcache;
1436}
1437 3415
3416 if (!*avp)
3417 *avp = newAV ();
3418
3419 av_push (*avp, SvREFCNT_inc (block));
3420
3421 if (!ix)
3422 on_enterleave_call (aTHX_ block);
3423
3424 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3425 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3426 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3427}
3428
3429
3430MODULE = Coro::State PACKAGE = PerlIO::cede
3431
3432BOOT:
3433 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3434
3435
3436MODULE = Coro::State PACKAGE = Coro::Semaphore
3437
3438SV *
3439new (SV *klass, SV *count = 0)
3440 CODE:
3441 RETVAL = sv_bless (
3442 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3443 GvSTASH (CvGV (cv))
3444 );
3445 OUTPUT:
3446 RETVAL
3447
3448# helper for Coro::Channel
3449SV *
3450_alloc (int count)
3451 CODE:
3452 RETVAL = coro_waitarray_new (aTHX_ count);
3453 OUTPUT:
3454 RETVAL
3455
3456SV *
3457count (SV *self)
3458 CODE:
3459 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3460 OUTPUT:
3461 RETVAL
3462
3463void
3464up (SV *self, int adjust = 1)
3465 ALIAS:
3466 adjust = 1
3467 CODE:
3468 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3469
3470void
3471down (...)
3472 CODE:
3473 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3474
3475void
3476wait (...)
3477 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3479
3480void
3481try (SV *self)
3482 PPCODE:
3483{
3484 AV *av = (AV *)SvRV (self);
3485 SV *count_sv = AvARRAY (av)[0];
3486 IV count = SvIVX (count_sv);
3487
3488 if (count > 0)
3489 {
3490 --count;
3491 SvIVX (count_sv) = count;
3492 XSRETURN_YES;
3493 }
3494 else
3495 XSRETURN_NO;
3496}
3497
3498void
3499waiters (SV *self)
3500 PPCODE:
3501{
3502 AV *av = (AV *)SvRV (self);
3503 int wcount = AvFILLp (av) + 1 - 1;
3504
3505 if (GIMME_V == G_SCALAR)
3506 XPUSHs (sv_2mortal (newSViv (wcount)));
3507 else
3508 {
3509 int i;
3510 EXTEND (SP, wcount);
3511 for (i = 1; i <= wcount; ++i)
3512 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3513 }
3514}
3515
3516MODULE = Coro::State PACKAGE = Coro::Signal
3517
3518SV *
3519new (SV *klass)
3520 CODE:
3521 RETVAL = sv_bless (
3522 coro_waitarray_new (aTHX_ 0),
3523 GvSTASH (CvGV (cv))
3524 );
3525 OUTPUT:
3526 RETVAL
3527
3528void
3529wait (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3532
3533void
3534broadcast (SV *self)
3535 CODE:
3536{
3537 AV *av = (AV *)SvRV (self);
3538 coro_signal_wake (aTHX_ av, AvFILLp (av));
3539}
3540
3541void
3542send (SV *self)
3543 CODE:
3544{
3545 AV *av = (AV *)SvRV (self);
3546
3547 if (AvFILLp (av))
3548 coro_signal_wake (aTHX_ av, 1);
3549 else
3550 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3551}
3552
3553IV
3554awaited (SV *self)
3555 CODE:
3556 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3557 OUTPUT:
3558 RETVAL
3559
3560
3561MODULE = Coro::State PACKAGE = Coro::AnyEvent
3562
3563BOOT:
3564 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3565
3566void
3567_schedule (...)
3568 CODE:
3569{
3570 static int incede;
3571
3572 api_cede_notself (aTHX);
3573
3574 ++incede;
3575 while (coro_nready >= incede && api_cede (aTHX))
3576 ;
3577
3578 sv_setsv (sv_activity, &PL_sv_undef);
3579 if (coro_nready >= incede)
3580 {
3581 PUSHMARK (SP);
3582 PUTBACK;
3583 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3584 }
3585
3586 --incede;
3587}
3588
3589
3590MODULE = Coro::State PACKAGE = Coro::AIO
3591
3592void
3593_register (char *target, char *proto, SV *req)
3594 CODE:
3595{
3596 CV *req_cv = coro_sv_2cv (aTHX_ req);
3597 /* newXSproto doesn't return the CV on 5.8 */
3598 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3599 sv_setpv ((SV *)slf_cv, proto);
3600 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3601}
3602

Diff Legend

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