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Comparing Coro/Coro/State.xs (file contents):
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC vs.
Revision 1.337 by root, Fri Dec 5 18:26:10 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
… …
90# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif 126#endif
92 127
93/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
95#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
96#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
97 137
98#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
99 139
100#if __GNUC__ >= 3 140#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
103#else 144#else
104# define attribute(x) 145# define attribute(x)
105# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
106#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
107 152
108#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
109 154
110#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
111 157
112#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
113static perl_mutex coro_mutex; 159# if CORO_PTHREAD
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif 161# endif
162#endif
120 163
121/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129 165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
130static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env; 174static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
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 */
136 187
137/* async_pool helper stuff */ 188/* async_pool helper stuff */
138static SV *sv_pool_rss; 189static SV *sv_pool_rss;
139static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
140static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
141 199
142static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
144 202
145enum { 203enum {
… …
150 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152}; 210};
153 211
154/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx { 213typedef struct coro_cctx
214{
156 struct coro_cctx *next; 215 struct coro_cctx *next;
157 216
158 /* the stack */ 217 /* the stack */
159 void *sptr; 218 void *sptr;
160 size_t ssize; 219 size_t ssize;
… …
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 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 */
165 JMPENV *top_env; 224 JMPENV *top_env;
166 coro_context cctx; 225 coro_context cctx;
167 226
227 U32 gen;
168#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
169 int valgrind_id; 229 int valgrind_id;
170#endif 230#endif
171 unsigned char flags; 231 unsigned char flags;
172} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
173 237
174enum { 238enum {
175 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179}; 243};
180 244
181/* this is a structure representing a perl-level coroutine */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
182struct coro { 246typedef struct
183 /* the c coroutine allocated to this perl coroutine, if any */ 247{
184 coro_cctx *cctx; 248 SV *defsv;
185 249 AV *defav;
186 /* data associated with this coroutine (initial args) */ 250 SV *errsv;
187 AV *args; 251 SV *irsgv;
188 int refcnt; 252 HV *hinthv;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name; 253#define VAR(name,type) type name;
201# include "state.h" 254# include "state.h"
202#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);
203 276
204 /* statistics */ 277 /* statistics */
205 int usecount; /* number of switches to this coro */ 278 int usecount; /* number of transfers to this coro */
206 279
207 /* coro process data */ 280 /* coro process data */
208 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;
209 289
210 /* linked list */ 290 /* linked list */
211 struct coro *next, *prev; 291 struct coro *next, *prev;
212 HV *hv; /* the perl hash associated with this coro, if any */
213}; 292};
214 293
215typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
216typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
296
297/* the following variables are effectively part of the perl context */
298/* and get copied between struct coro and these variables */
299/* the mainr easonw e don't support windows process emulation */
300static struct CoroSLF slf_frame; /* the current slf frame */
217 301
218/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
219 303
220#define PRIO_MAX 3 304#define PRIO_MAX 3
221#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
224#define PRIO_IDLE -3 308#define PRIO_IDLE -3
225#define PRIO_MIN -4 309#define PRIO_MIN -4
226 310
227/* for Coro.pm */ 311/* for Coro.pm */
228static SV *coro_current; 312static SV *coro_current;
313static SV *coro_readyhook;
229static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
230static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
231static struct coro *coro_first; 316static struct coro *coro_first;
317#define coro_nready coroapi.nready
232 318
233/** lowlevel stuff **********************************************************/ 319/** lowlevel stuff **********************************************************/
234 320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
330
235static AV * 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
333{
334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
384
385 if (SvROK (coro))
386 coro = SvRV (coro);
387
388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
389 croak ("Coro::State object required");
390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
412static AV *
236coro_clone_padlist (pTHX_ CV *cv) 413coro_derive_padlist (pTHX_ CV *cv)
237{ 414{
238 AV *padlist = CvPADLIST (cv); 415 AV *padlist = CvPADLIST (cv);
239 AV *newpadlist, *newpad; 416 AV *newpadlist, *newpad;
240 417
241 newpadlist = newAV (); 418 newpadlist = newAV ();
242 AvREAL_off (newpadlist); 419 AvREAL_off (newpadlist);
243#if PERL_VERSION_ATLEAST (5,9,0) 420#if PERL_VERSION_ATLEAST (5,10,0)
244 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
245#else 422#else
246 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
247#endif 424#endif
248 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
249 --AvFILLp (padlist); 426 --AvFILLp (padlist);
250 427
251 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
252 av_store (newpadlist, 1, (SV *)newpad); 429 av_store (newpadlist, 1, (SV *)newpad);
253 430
254 return newpadlist; 431 return newpadlist;
255} 432}
256 433
257static void 434static void
258free_padlist (pTHX_ AV *padlist) 435free_padlist (pTHX_ AV *padlist)
259{ 436{
260 /* may be during global destruction */ 437 /* may be during global destruction */
261 if (SvREFCNT (padlist)) 438 if (!IN_DESTRUCT)
262 { 439 {
263 I32 i = AvFILLp (padlist); 440 I32 i = AvFILLp (padlist);
264 while (i >= 0) 441
442 while (i > 0) /* special-case index 0 */
265 { 443 {
266 SV **svp = av_fetch (padlist, i--, FALSE); 444 /* we try to be extra-careful here */
267 if (svp) 445 AV *av = (AV *)AvARRAY (padlist)[i--];
268 { 446 I32 j = AvFILLp (av);
269 SV *sv; 447
270 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
271 SvREFCNT_dec (sv); 452 SvREFCNT_dec (av);
272
273 SvREFCNT_dec (*svp);
274 }
275 } 453 }
276 454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
277 SvREFCNT_dec ((SV*)padlist); 458 SvREFCNT_dec ((SV*)padlist);
278 } 459 }
279} 460}
280 461
281static int 462static int
… …
286 467
287 /* casting is fun. */ 468 /* casting is fun. */
288 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
289 free_padlist (aTHX_ padlist); 470 free_padlist (aTHX_ padlist);
290 471
291 SvREFCNT_dec (av); 472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
292 473
293 return 0; 474 return 0;
294} 475}
295 476
296#define PERL_MAGIC_coro PERL_MAGIC_ext 477static MGVTBL coro_cv_vtbl = {
297 478 0, 0, 0, 0,
298static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 479 coro_cv_free
299 480};
300#define CORO_MAGIC(cv) \
301 SvMAGIC (cv) \
302 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
303 ? SvMAGIC (cv) \
304 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
305 : 0
306
307static struct coro *
308SvSTATE_ (pTHX_ SV *coro)
309{
310 HV *stash;
311 MAGIC *mg;
312
313 if (SvROK (coro))
314 coro = SvRV (coro);
315
316 if (SvTYPE (coro) != SVt_PVHV)
317 croak ("Coro::State object required");
318
319 stash = SvSTASH (coro);
320 if (stash != coro_stash && stash != coro_state_stash)
321 {
322 /* very slow, but rare, check */
323 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
324 croak ("Coro::State object required");
325 }
326
327 mg = CORO_MAGIC (coro);
328 return (struct coro *)mg->mg_ptr;
329}
330
331#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
332 481
333/* the next two functions merely cache the padlists */ 482/* the next two functions merely cache the padlists */
334static void 483static void
335get_padlist (pTHX_ CV *cv) 484get_padlist (pTHX_ CV *cv)
336{ 485{
337 MAGIC *mg = CORO_MAGIC (cv); 486 MAGIC *mg = CORO_MAGIC_cv (cv);
338 AV *av; 487 AV *av;
339 488
340 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
341 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
342 else 491 else
343 { 492 {
344#if CORO_PREFER_PERL_FUNCTIONS 493#if CORO_PREFER_PERL_FUNCTIONS
345 /* this is probably cleaner, but also slower? */ 494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
346 CV *cp = Perl_cv_clone (cv); 496 CV *cp = Perl_cv_clone (aTHX_ cv);
347 CvPADLIST (cv) = CvPADLIST (cp); 497 CvPADLIST (cv) = CvPADLIST (cp);
348 CvPADLIST (cp) = 0; 498 CvPADLIST (cp) = 0;
349 SvREFCNT_dec (cp); 499 SvREFCNT_dec (cp);
350#else 500#else
351 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
352#endif 502#endif
353 } 503 }
354} 504}
355 505
356static void 506static void
357put_padlist (pTHX_ CV *cv) 507put_padlist (pTHX_ CV *cv)
358{ 508{
359 MAGIC *mg = CORO_MAGIC (cv); 509 MAGIC *mg = CORO_MAGIC_cv (cv);
360 AV *av; 510 AV *av;
361 511
362 if (!mg) 512 if (expect_false (!mg))
363 { 513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
364 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
365 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
366 mg->mg_virtual = &vtbl_coro;
367 mg->mg_obj = (SV *)newAV ();
368 }
369 514
370 av = (AV *)mg->mg_obj; 515 av = (AV *)mg->mg_obj;
371 516
372 if (AvFILLp (av) >= AvMAX (av)) 517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
373 av_extend (av, AvMAX (av) + 1); 518 av_extend (av, AvFILLp (av) + 1);
374 519
375 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
376} 521}
377 522
378/** load & save, init *******************************************************/ 523/** load & save, init *******************************************************/
379 524
380#define SB do {
381#define SE } while (0)
382
383#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
384
385static void 525static void
386load_perl (pTHX_ Coro__State c) 526load_perl (pTHX_ Coro__State c)
387{ 527{
528 perl_slots *slot = c->slot;
529 c->slot = 0;
530
531 PL_mainstack = c->mainstack;
532
533 GvSV (PL_defgv) = slot->defsv;
534 GvAV (PL_defgv) = slot->defav;
535 GvSV (PL_errgv) = slot->errsv;
536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
538
388#define VAR(name,type) PL_ ## name = c->name; 539 #define VAR(name,type) PL_ ## name = slot->name;
389# include "state.h" 540 # include "state.h"
390#undef VAR 541 #undef VAR
391
392 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
393 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
394 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
395 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
396
397 if (c->irssv)
398 {
399 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
400 {
401 SvREFCNT_dec (c->irssv);
402 c->irssv = 0;
403 }
404 else
405 {
406 REPLACE_SV (PL_rs, c->irssv);
407 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
408 sv_setsv (c->irssv_sv, PL_rs);
409 }
410 }
411 542
412 { 543 {
413 dSP; 544 dSP;
545
414 CV *cv; 546 CV *cv;
415 547
416 /* now do the ugly restore mess */ 548 /* now do the ugly restore mess */
417 while ((cv = (CV *)POPs)) 549 while (expect_true (cv = (CV *)POPs))
418 { 550 {
419 put_padlist (aTHX_ cv); /* mark this padlist as available */ 551 put_padlist (aTHX_ cv); /* mark this padlist as available */
420 CvDEPTH (cv) = PTR2IV (POPs); 552 CvDEPTH (cv) = PTR2IV (POPs);
421 CvPADLIST (cv) = (AV *)POPs; 553 CvPADLIST (cv) = (AV *)POPs;
422 } 554 }
423 555
424 PUTBACK; 556 PUTBACK;
425 } 557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
426} 561}
427 562
428static void 563static void
429save_perl (pTHX_ Coro__State c) 564save_perl (pTHX_ Coro__State c)
430{ 565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
431 { 569 {
432 dSP; 570 dSP;
433 I32 cxix = cxstack_ix; 571 I32 cxix = cxstack_ix;
434 PERL_CONTEXT *ccstk = cxstack; 572 PERL_CONTEXT *ccstk = cxstack;
435 PERL_SI *top_si = PL_curstackinfo; 573 PERL_SI *top_si = PL_curstackinfo;
… …
441 579
442 XPUSHs (Nullsv); 580 XPUSHs (Nullsv);
443 /* this loop was inspired by pp_caller */ 581 /* this loop was inspired by pp_caller */
444 for (;;) 582 for (;;)
445 { 583 {
446 while (cxix >= 0) 584 while (expect_true (cxix >= 0))
447 { 585 {
448 PERL_CONTEXT *cx = &ccstk[cxix--]; 586 PERL_CONTEXT *cx = &ccstk[cxix--];
449 587
450 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
451 { 589 {
452 CV *cv = cx->blk_sub.cv; 590 CV *cv = cx->blk_sub.cv;
453 591
454 if (CvDEPTH (cv)) 592 if (expect_true (CvDEPTH (cv)))
455 { 593 {
456 EXTEND (SP, 3); 594 EXTEND (SP, 3);
457 PUSHs ((SV *)CvPADLIST (cv)); 595 PUSHs ((SV *)CvPADLIST (cv));
458 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
459 PUSHs ((SV *)cv); 597 PUSHs ((SV *)cv);
460 598
461 CvDEPTH (cv) = 0; 599 CvDEPTH (cv) = 0;
462 get_padlist (aTHX_ cv); 600 get_padlist (aTHX_ cv);
463 } 601 }
464 } 602 }
465 } 603 }
466 604
467 if (top_si->si_type == PERLSI_MAIN) 605 if (expect_true (top_si->si_type == PERLSI_MAIN))
468 break; 606 break;
469 607
470 top_si = top_si->si_prev; 608 top_si = top_si->si_prev;
471 ccstk = top_si->si_cxstack; 609 ccstk = top_si->si_cxstack;
472 cxix = top_si->si_cxix; 610 cxix = top_si->si_cxix;
473 } 611 }
474 612
475 PUTBACK; 613 PUTBACK;
476 } 614 }
477 615
478 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 616 /* allocate some space on the context stack for our purposes */
479 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 617 /* we manually unroll here, as usually 2 slots is enough */
480 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 618 if (SLOT_COUNT >= 1) CXINC;
481 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 619 if (SLOT_COUNT >= 2) CXINC;
482 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 620 if (SLOT_COUNT >= 3) CXINC;
621 {
622 int i;
623 for (i = 3; i < SLOT_COUNT; ++i)
624 CXINC;
625 }
626 cxstack_ix -= SLOT_COUNT; /* undo allocation */
483 627
628 c->mainstack = PL_mainstack;
629
630 {
631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
632
633 slot->defav = GvAV (PL_defgv);
634 slot->defsv = DEFSV;
635 slot->errsv = ERRSV;
636 slot->irsgv = GvSV (irsgv);
637 slot->hinthv = GvHV (PL_hintgv);
638
484#define VAR(name,type)c->name = PL_ ## name; 639 #define VAR(name,type) slot->name = PL_ ## name;
485# include "state.h" 640 # include "state.h"
486#undef VAR 641 #undef VAR
642 }
487} 643}
488 644
489/* 645/*
490 * allocate various perl stacks. This is an exact copy 646 * allocate various perl stacks. This is almost an exact copy
491 * of perl.c:init_stacks, except that it uses less memory 647 * of perl.c:init_stacks, except that it uses less memory
492 * on the (sometimes correct) assumption that coroutines do 648 * on the (sometimes correct) assumption that coroutines do
493 * not usually need a lot of stackspace. 649 * not usually need a lot of stackspace.
494 */ 650 */
495#if CORO_PREFER_PERL_FUNCTIONS 651#if CORO_PREFER_PERL_FUNCTIONS
496# define coro_init_stacks init_stacks 652# define coro_init_stacks(thx) init_stacks ()
497#else 653#else
498static void 654static void
499coro_init_stacks (pTHX) 655coro_init_stacks (pTHX)
500{ 656{
501 PL_curstackinfo = new_stackinfo(64, 6); 657 PL_curstackinfo = new_stackinfo(32, 8);
502 PL_curstackinfo->si_type = PERLSI_MAIN; 658 PL_curstackinfo->si_type = PERLSI_MAIN;
503 PL_curstack = PL_curstackinfo->si_stack; 659 PL_curstack = PL_curstackinfo->si_stack;
504 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505 661
506 PL_stack_base = AvARRAY(PL_curstack); 662 PL_stack_base = AvARRAY(PL_curstack);
507 PL_stack_sp = PL_stack_base; 663 PL_stack_sp = PL_stack_base;
508 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509 665
510 New(50,PL_tmps_stack,64,SV*); 666 New(50,PL_tmps_stack,32,SV*);
511 PL_tmps_floor = -1; 667 PL_tmps_floor = -1;
512 PL_tmps_ix = -1; 668 PL_tmps_ix = -1;
513 PL_tmps_max = 64; 669 PL_tmps_max = 32;
514 670
515 New(54,PL_markstack,16,I32); 671 New(54,PL_markstack,16,I32);
516 PL_markstack_ptr = PL_markstack; 672 PL_markstack_ptr = PL_markstack;
517 PL_markstack_max = PL_markstack + 16; 673 PL_markstack_max = PL_markstack + 16;
518 674
519#ifdef SET_MARK_OFFSET 675#ifdef SET_MARK_OFFSET
520 SET_MARK_OFFSET; 676 SET_MARK_OFFSET;
521#endif 677#endif
522 678
523 New(54,PL_scopestack,16,I32); 679 New(54,PL_scopestack,8,I32);
524 PL_scopestack_ix = 0; 680 PL_scopestack_ix = 0;
525 PL_scopestack_max = 16; 681 PL_scopestack_max = 8;
526 682
527 New(54,PL_savestack,64,ANY); 683 New(54,PL_savestack,24,ANY);
528 PL_savestack_ix = 0; 684 PL_savestack_ix = 0;
529 PL_savestack_max = 64; 685 PL_savestack_max = 24;
530 686
531#if !PERL_VERSION_ATLEAST (5,9,0) 687#if !PERL_VERSION_ATLEAST (5,10,0)
532 New(54,PL_retstack,4,OP*); 688 New(54,PL_retstack,4,OP*);
533 PL_retstack_ix = 0; 689 PL_retstack_ix = 0;
534 PL_retstack_max = 4; 690 PL_retstack_max = 4;
535#endif 691#endif
536} 692}
… …
538 694
539/* 695/*
540 * destroy the stacks, the callchain etc... 696 * destroy the stacks, the callchain etc...
541 */ 697 */
542static void 698static void
543coro_destroy_stacks (pTHX) 699coro_destruct_stacks (pTHX)
544{ 700{
545 if (!IN_DESTRUCT)
546 {
547 /* restore all saved variables and stuff */
548 LEAVE_SCOPE (0);
549 assert (PL_tmps_floor == -1);
550
551 /* free all temporaries */
552 FREETMPS;
553 assert (PL_tmps_ix == -1);
554
555 /* unwind all extra stacks */
556 POPSTACK_TO (PL_mainstack);
557
558 /* unwind main stack */
559 dounwind (-1);
560 }
561
562 while (PL_curstackinfo->si_next) 701 while (PL_curstackinfo->si_next)
563 PL_curstackinfo = PL_curstackinfo->si_next; 702 PL_curstackinfo = PL_curstackinfo->si_next;
564 703
565 while (PL_curstackinfo) 704 while (PL_curstackinfo)
566 { 705 {
… …
576 715
577 Safefree (PL_tmps_stack); 716 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 717 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 718 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 719 Safefree (PL_savestack);
581#if !PERL_VERSION_ATLEAST (5,9,0) 720#if !PERL_VERSION_ATLEAST (5,10,0)
582 Safefree (PL_retstack); 721 Safefree (PL_retstack);
583#endif 722#endif
584} 723}
724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
585 733
586static size_t 734static size_t
587coro_rss (pTHX_ struct coro *coro) 735coro_rss (pTHX_ struct coro *coro)
588{ 736{
589 size_t rss = sizeof (coro); 737 size_t rss = sizeof (*coro);
590 738
591 if (coro->mainstack) 739 if (coro->mainstack)
592 { 740 {
593 if (coro->flags & CF_RUNNING) 741 if (coro->flags & CF_RUNNING)
594 { 742 {
595 #define VAR(name,type)coro->name = PL_ ## name; 743 #define SYM(sym) PL_ ## sym
596 # include "state.h" 744 CORO_RSS;
597 #undef VAR 745 #undef SYM
598 } 746 }
599 747 else
600 rss += sizeof (coro->curstackinfo); 748 {
601 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 749 #define SYM(sym) coro->slot->sym
602 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 750 CORO_RSS;
603 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 751 #undef SYM
604 rss += coro->tmps_max * sizeof (SV *); 752 }
605 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
606 rss += coro->scopestack_max * sizeof (I32);
607 rss += coro->savestack_max * sizeof (ANY);
608
609#if !PERL_VERSION_ATLEAST (5,9,0)
610 rss += coro->retstack_max * sizeof (OP *);
611#endif
612 } 753 }
613 754
614 return rss; 755 return rss;
615} 756}
616 757
617/** coroutine stack handling ************************************************/ 758/** coroutine stack handling ************************************************/
618 759
760static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
761static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
762static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
763
764/* apparently < 5.8.8 */
765#ifndef MgPV_nolen_const
766#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
767 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
768 (const char*)(mg)->mg_ptr)
769#endif
770
771/*
772 * This overrides the default magic get method of %SIG elements.
773 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
774 * and instead of tryign to save and restore the hash elements, we just provide
775 * readback here.
776 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
777 * not expecting this to actually change the hook. This is a potential problem
778 * when a schedule happens then, but we ignore this.
779 */
619static void 780static int
781coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
782{
783 const char *s = MgPV_nolen_const (mg);
784
785 if (*s == '_')
786 {
787 SV **svp = 0;
788
789 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
790 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
791
792 if (svp)
793 {
794 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = 0;
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
824}
825
826static int
827coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
828{
829 const char *s = MgPV_nolen_const (mg);
830
831 if (*s == '_')
832 {
833 SV **svp = 0;
834
835 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
836 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
837
838 if (svp)
839 {
840 SV *old = *svp;
841 *svp = newSVsv (sv);
842 SvREFCNT_dec (old);
843 return 0;
844 }
845 }
846
847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
848}
849
850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
620setup_coro (pTHX_ struct coro *coro) 872coro_setup (pTHX_ struct coro *coro)
621{ 873{
622 /* 874 /*
623 * emulate part of the perl startup here. 875 * emulate part of the perl startup here.
624 */ 876 */
625 coro_init_stacks (aTHX); 877 coro_init_stacks (aTHX);
626 878
627 PL_runops = RUNOPS_DEFAULT; 879 PL_runops = RUNOPS_DEFAULT;
628 PL_curcop = &PL_compiling; 880 PL_curcop = &PL_compiling;
629 PL_in_eval = EVAL_NULL; 881 PL_in_eval = EVAL_NULL;
630 PL_comppad = 0; 882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
631 PL_curpm = 0; 886 PL_curpm = 0;
887 PL_curpad = 0;
632 PL_localizing = 0; 888 PL_localizing = 0;
633 PL_dirty = 0; 889 PL_dirty = 0;
634 PL_restartop = 0; 890 PL_restartop = 0;
891#if PERL_VERSION_ATLEAST (5,10,0)
892 PL_parser = 0;
893#endif
894 PL_hints = 0;
895
896 /* recreate the die/warn hooks */
897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
899
900 GvSV (PL_defgv) = newSV (0);
901 GvAV (PL_defgv) = coro->args; coro->args = 0;
902 GvSV (PL_errgv) = newSV (0);
903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
905 PL_rs = newSVsv (GvSV (irsgv));
906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
635 907
636 { 908 {
637 dSP; 909 dSP;
638 LOGOP myop; 910 UNOP myop;
639 911
640 SvREFCNT_dec (GvAV (PL_defgv));
641 GvAV (PL_defgv) = coro->args; coro->args = 0;
642
643 Zero (&myop, 1, LOGOP); 912 Zero (&myop, 1, UNOP);
644 myop.op_next = Nullop; 913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
645 myop.op_flags = OPf_WANT_VOID; 915 myop.op_flags = OPf_WANT_VOID;
646 916
647 PUSHMARK (SP); 917 PUSHMARK (SP);
648 XPUSHs (av_shift (GvAV (PL_defgv))); 918 PUSHs ((SV *)coro->startcv);
649 PUTBACK; 919 PUTBACK;
650 PL_op = (OP *)&myop; 920 PL_op = (OP *)&myop;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 } 922 }
654 923
655 ENTER; /* necessary e.g. for dounwind */ 924 /* this newly created coroutine might be run on an existing cctx which most
656} 925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
926 */
927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
657 929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
658static void 942static void
943coro_unwind_stacks (pTHX)
944{
945 if (!IN_DESTRUCT)
946 {
947 /* restore all saved variables and stuff */
948 LEAVE_SCOPE (0);
949 assert (PL_tmps_floor == -1);
950
951 /* free all temporaries */
952 FREETMPS;
953 assert (PL_tmps_ix == -1);
954
955 /* unwind all extra stacks */
956 POPSTACK_TO (PL_mainstack);
957
958 /* unwind main stack */
959 dounwind (-1);
960 }
961}
962
963static void
964coro_destruct_perl (pTHX_ struct coro *coro)
965{
966 coro_unwind_stacks (aTHX);
967
968 SvREFCNT_dec (GvSV (PL_defgv));
969 SvREFCNT_dec (GvAV (PL_defgv));
970 SvREFCNT_dec (GvSV (PL_errgv));
971 SvREFCNT_dec (PL_defoutgv);
972 SvREFCNT_dec (PL_rs);
973 SvREFCNT_dec (GvSV (irsgv));
974 SvREFCNT_dec (GvHV (PL_hintgv));
975
976 SvREFCNT_dec (PL_diehook);
977 SvREFCNT_dec (PL_warnhook);
978
979 SvREFCNT_dec (coro->saved_deffh);
980 SvREFCNT_dec (coro->rouse_cb);
981 SvREFCNT_dec (coro->invoke_cb);
982 SvREFCNT_dec (coro->invoke_av);
983
984 coro_destruct_stacks (aTHX);
985}
986
987INLINE void
659free_coro_mortal (pTHX) 988free_coro_mortal (pTHX)
660{ 989{
661 if (coro_mortal) 990 if (expect_true (coro_mortal))
662 { 991 {
663 SvREFCNT_dec (coro_mortal); 992 SvREFCNT_dec (coro_mortal);
664 coro_mortal = 0; 993 coro_mortal = 0;
665 } 994 }
666} 995}
… …
668static int 997static int
669runops_trace (pTHX) 998runops_trace (pTHX)
670{ 999{
671 COP *oldcop = 0; 1000 COP *oldcop = 0;
672 int oldcxix = -2; 1001 int oldcxix = -2;
673 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
674 coro_cctx *cctx = coro->cctx;
675 1002
676 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1003 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
677 { 1004 {
678 PERL_ASYNC_CHECK (); 1005 PERL_ASYNC_CHECK ();
679 1006
680 if (cctx->flags & CC_TRACE_ALL) 1007 if (cctx_current->flags & CC_TRACE_ALL)
681 { 1008 {
682 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1009 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
683 { 1010 {
684 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1011 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
685 SV **bot, **top; 1012 SV **bot, **top;
686 AV *av = newAV (); /* return values */ 1013 AV *av = newAV (); /* return values */
687 SV **cb; 1014 SV **cb;
… …
695 bot = PL_stack_base + cx->blk_oldsp + 1; 1022 bot = PL_stack_base + cx->blk_oldsp + 1;
696 top = cx->blk_gimme == G_ARRAY ? SP + 1 1023 top = cx->blk_gimme == G_ARRAY ? SP + 1
697 : cx->blk_gimme == G_SCALAR ? bot + 1 1024 : cx->blk_gimme == G_SCALAR ? bot + 1
698 : bot; 1025 : bot;
699 1026
1027 av_extend (av, top - bot);
700 while (bot < top) 1028 while (bot < top)
701 av_push (av, SvREFCNT_inc (*bot++)); 1029 av_push (av, SvREFCNT_inc_NN (*bot++));
702 1030
703 PL_runops = RUNOPS_DEFAULT; 1031 PL_runops = RUNOPS_DEFAULT;
704 ENTER; 1032 ENTER;
705 SAVETMPS; 1033 SAVETMPS;
706 EXTEND (SP, 3); 1034 EXTEND (SP, 3);
… …
723 1051
724 if (PL_curcop != &PL_compiling) 1052 if (PL_curcop != &PL_compiling)
725 { 1053 {
726 SV **cb; 1054 SV **cb;
727 1055
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1056 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
729 { 1057 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1058 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
731 1059
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1060 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
733 { 1061 {
734 runops_proc_t old_runops = PL_runops;
735 dSP; 1062 dSP;
736 GV *gv = CvGV (cx->blk_sub.cv); 1063 GV *gv = CvGV (cx->blk_sub.cv);
737 SV *fullname = sv_2mortal (newSV (0)); 1064 SV *fullname = sv_2mortal (newSV (0));
738 1065
739 if (isGV (gv)) 1066 if (isGV (gv))
… …
744 SAVETMPS; 1071 SAVETMPS;
745 EXTEND (SP, 3); 1072 EXTEND (SP, 3);
746 PUSHMARK (SP); 1073 PUSHMARK (SP);
747 PUSHs (&PL_sv_yes); 1074 PUSHs (&PL_sv_yes);
748 PUSHs (fullname); 1075 PUSHs (fullname);
749 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1076 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
750 PUTBACK; 1077 PUTBACK;
751 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1078 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
752 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1079 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
753 SPAGAIN; 1080 SPAGAIN;
754 FREETMPS; 1081 FREETMPS;
… …
757 } 1084 }
758 1085
759 oldcxix = cxstack_ix; 1086 oldcxix = cxstack_ix;
760 } 1087 }
761 1088
762 if (cctx->flags & CC_TRACE_LINE) 1089 if (cctx_current->flags & CC_TRACE_LINE)
763 { 1090 {
764 dSP; 1091 dSP;
765 1092
766 PL_runops = RUNOPS_DEFAULT; 1093 PL_runops = RUNOPS_DEFAULT;
767 ENTER; 1094 ENTER;
… …
786 1113
787 TAINT_NOT; 1114 TAINT_NOT;
788 return 0; 1115 return 0;
789} 1116}
790 1117
791/* inject a fake call to Coro::State::_cctx_init into the execution */ 1118static struct CoroSLF cctx_ssl_frame;
792/* _cctx_init should be careful, as it could be called at almost any time */ 1119
793/* during execution of a perl program */ 1120static void
1121slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1122{
1123 ta->prev = 0;
1124}
1125
1126static int
1127slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1128{
1129 *frame = cctx_ssl_frame;
1130
1131 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1132}
1133
1134/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
794static void NOINLINE 1135static void NOINLINE
795prepare_cctx (pTHX_ coro_cctx *cctx) 1136cctx_prepare (pTHX)
796{ 1137{
797 dSP;
798 LOGOP myop;
799
800 PL_top_env = &PL_start_env; 1138 PL_top_env = &PL_start_env;
801 1139
802 if (cctx->flags & CC_TRACE) 1140 if (cctx_current->flags & CC_TRACE)
803 PL_runops = runops_trace; 1141 PL_runops = runops_trace;
804 1142
805 Zero (&myop, 1, LOGOP); 1143 /* we already must be executing an SLF op, there is no other valid way
806 myop.op_next = PL_op; 1144 * that can lead to creation of a new cctx */
807 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1145 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1146 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
808 1147
809 PUSHMARK (SP); 1148 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
810 EXTEND (SP, 2); 1149 cctx_ssl_frame = slf_frame;
811 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1150
812 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1151 slf_frame.prepare = slf_prepare_set_stacklevel;
813 PUTBACK; 1152 slf_frame.check = slf_check_set_stacklevel;
814 PL_op = (OP *)&myop; 1153}
815 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1154
816 SPAGAIN; 1155/* the tail of transfer: execute stuff we can only do after a transfer */
1156INLINE void
1157transfer_tail (pTHX)
1158{
1159 free_coro_mortal (aTHX);
817} 1160}
818 1161
819/* 1162/*
820 * this is a _very_ stripped down perl interpreter ;) 1163 * this is a _very_ stripped down perl interpreter ;)
821 */ 1164 */
822static void 1165static void
823coro_run (void *arg) 1166cctx_run (void *arg)
824{ 1167{
1168#ifdef USE_ITHREADS
1169# if CORO_PTHREAD
1170 PERL_SET_CONTEXT (coro_thx);
1171# endif
1172#endif
1173 {
825 dTHX; 1174 dTHX;
826 1175
827 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1176 /* normally we would need to skip the entersub here */
828 UNLOCK; 1177 /* not doing so will re-execute it, which is exactly what we want */
829
830 /* we now skip the entersub that lead to transfer() */
831 PL_op = PL_op->op_next; 1178 /* PL_nop = PL_nop->op_next */
832 1179
833 /* inject a fake subroutine call to cctx_init */ 1180 /* inject a fake subroutine call to cctx_init */
834 prepare_cctx (aTHX_ (coro_cctx *)arg); 1181 cctx_prepare (aTHX);
835 1182
1183 /* cctx_run is the alternative tail of transfer() */
1184 transfer_tail (aTHX);
1185
836 /* somebody or something will hit me for both perl_run and PL_restartop */ 1186 /* somebody or something will hit me for both perl_run and PL_restartop */
837 PL_restartop = PL_op; 1187 PL_restartop = PL_op;
838 perl_run (PL_curinterp); 1188 perl_run (PL_curinterp);
839
840 /* 1189 /*
1190 * Unfortunately, there is no way to get at the return values of the
1191 * coro body here, as perl_run destroys these
1192 */
1193
1194 /*
841 * If perl-run returns we assume exit() was being called or the coro 1195 * If perl-run returns we assume exit() was being called or the coro
842 * fell off the end, which seems to be the only valid (non-bug) 1196 * fell off the end, which seems to be the only valid (non-bug)
843 * reason for perl_run to return. We try to exit by jumping to the 1197 * reason for perl_run to return. We try to exit by jumping to the
844 * bootstrap-time "top" top_env, as we cannot restore the "main" 1198 * bootstrap-time "top" top_env, as we cannot restore the "main"
845 * coroutine as Coro has no such concept 1199 * coroutine as Coro has no such concept.
1200 * This actually isn't valid with the pthread backend, but OSes requiring
1201 * that backend are too broken to do it in a standards-compliant way.
846 */ 1202 */
847 PL_top_env = main_top_env; 1203 PL_top_env = main_top_env;
848 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1204 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1205 }
849} 1206}
850 1207
851static coro_cctx * 1208static coro_cctx *
852cctx_new () 1209cctx_new ()
853{ 1210{
854 coro_cctx *cctx; 1211 coro_cctx *cctx;
1212
1213 ++cctx_count;
1214 New (0, cctx, 1, coro_cctx);
1215
1216 cctx->gen = cctx_gen;
1217 cctx->flags = 0;
1218 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1219
1220 return cctx;
1221}
1222
1223/* create a new cctx only suitable as source */
1224static coro_cctx *
1225cctx_new_empty ()
1226{
1227 coro_cctx *cctx = cctx_new ();
1228
1229 cctx->sptr = 0;
1230 coro_create (&cctx->cctx, 0, 0, 0, 0);
1231
1232 return cctx;
1233}
1234
1235/* create a new cctx suitable as destination/running a perl interpreter */
1236static coro_cctx *
1237cctx_new_run ()
1238{
1239 coro_cctx *cctx = cctx_new ();
855 void *stack_start; 1240 void *stack_start;
856 size_t stack_size; 1241 size_t stack_size;
857 1242
858 ++cctx_count;
859
860 Newz (0, cctx, 1, coro_cctx);
861
862#if HAVE_MMAP 1243#if HAVE_MMAP
863
864 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1244 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
865 /* mmap supposedly does allocate-on-write for us */ 1245 /* mmap supposedly does allocate-on-write for us */
866 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1246 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
867 1247
868 if (cctx->sptr != (void *)-1) 1248 if (cctx->sptr != (void *)-1)
869 { 1249 {
870# if CORO_STACKGUARD 1250 #if CORO_STACKGUARD
871 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1251 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
872# endif 1252 #endif
873 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1253 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
874 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1254 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
875 cctx->flags |= CC_MAPPED; 1255 cctx->flags |= CC_MAPPED;
876 } 1256 }
877 else 1257 else
878#endif 1258#endif
879 { 1259 {
880 cctx->ssize = coro_stacksize * (long)sizeof (long); 1260 cctx->ssize = cctx_stacksize * (long)sizeof (long);
881 New (0, cctx->sptr, coro_stacksize, long); 1261 New (0, cctx->sptr, cctx_stacksize, long);
882 1262
883 if (!cctx->sptr) 1263 if (!cctx->sptr)
884 { 1264 {
885 perror ("FATAL: unable to allocate stack for coroutine"); 1265 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
886 _exit (EXIT_FAILURE); 1266 _exit (EXIT_FAILURE);
887 } 1267 }
888 1268
889 stack_start = cctx->sptr; 1269 stack_start = cctx->sptr;
890 stack_size = cctx->ssize; 1270 stack_size = cctx->ssize;
891 } 1271 }
892 1272
893 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1273 #if CORO_USE_VALGRIND
1274 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1275 #endif
1276
894 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1277 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
895 1278
896 return cctx; 1279 return cctx;
897} 1280}
898 1281
899static void 1282static void
900cctx_destroy (coro_cctx *cctx) 1283cctx_destroy (coro_cctx *cctx)
901{ 1284{
902 if (!cctx) 1285 if (!cctx)
903 return; 1286 return;
904 1287
1288 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1289
905 --cctx_count; 1290 --cctx_count;
1291 coro_destroy (&cctx->cctx);
906 1292
1293 /* coro_transfer creates new, empty cctx's */
1294 if (cctx->sptr)
1295 {
907#if CORO_USE_VALGRIND 1296 #if CORO_USE_VALGRIND
908 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1297 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
909#endif 1298 #endif
910 1299
911#if HAVE_MMAP 1300#if HAVE_MMAP
912 if (cctx->flags & CC_MAPPED) 1301 if (cctx->flags & CC_MAPPED)
913 munmap (cctx->sptr, cctx->ssize); 1302 munmap (cctx->sptr, cctx->ssize);
914 else 1303 else
915#endif 1304#endif
916 Safefree (cctx->sptr); 1305 Safefree (cctx->sptr);
1306 }
917 1307
918 Safefree (cctx); 1308 Safefree (cctx);
919} 1309}
1310
1311/* wether this cctx should be destructed */
1312#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
920 1313
921static coro_cctx * 1314static coro_cctx *
922cctx_get (pTHX) 1315cctx_get (pTHX)
923{ 1316{
924 while (cctx_first) 1317 while (expect_true (cctx_first))
925 { 1318 {
926 coro_cctx *cctx = cctx_first; 1319 coro_cctx *cctx = cctx_first;
927 cctx_first = cctx->next; 1320 cctx_first = cctx->next;
928 --cctx_idle; 1321 --cctx_idle;
929 1322
930 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1323 if (expect_true (!CCTX_EXPIRED (cctx)))
931 return cctx; 1324 return cctx;
932 1325
933 cctx_destroy (cctx); 1326 cctx_destroy (cctx);
934 } 1327 }
935 1328
936 return cctx_new (); 1329 return cctx_new_run ();
937} 1330}
938 1331
939static void 1332static void
940cctx_put (coro_cctx *cctx) 1333cctx_put (coro_cctx *cctx)
941{ 1334{
1335 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1336
942 /* free another cctx if overlimit */ 1337 /* free another cctx if overlimit */
943 if (cctx_idle >= MAX_IDLE_CCTX) 1338 if (expect_false (cctx_idle >= cctx_max_idle))
944 { 1339 {
945 coro_cctx *first = cctx_first; 1340 coro_cctx *first = cctx_first;
946 cctx_first = first->next; 1341 cctx_first = first->next;
947 --cctx_idle; 1342 --cctx_idle;
948 1343
… …
954 cctx_first = cctx; 1349 cctx_first = cctx;
955} 1350}
956 1351
957/** coroutine switching *****************************************************/ 1352/** coroutine switching *****************************************************/
958 1353
959static void NOINLINE 1354static void
960transfer_check (pTHX_ struct coro *prev, struct coro *next) 1355transfer_check (pTHX_ struct coro *prev, struct coro *next)
961{ 1356{
962 if (prev != next) 1357 /* TODO: throwing up here is considered harmful */
1358
1359 if (expect_true (prev != next))
963 { 1360 {
964 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1361 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
965 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1362 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
966 1363
967 if (next->flags & CF_RUNNING) 1364 if (expect_false (next->flags & CF_RUNNING))
968 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1365 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
969 1366
970 if (next->flags & CF_DESTROYED) 1367 if (expect_false (next->flags & CF_DESTROYED))
971 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1368 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
972 1369
1370#if !PERL_VERSION_ATLEAST (5,10,0)
973 if (PL_lex_state != LEX_NOTPARSING) 1371 if (expect_false (PL_lex_state != LEX_NOTPARSING))
974 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1372 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1373#endif
975 } 1374 }
976} 1375}
977 1376
978/* always use the TRANSFER macro */ 1377/* always use the TRANSFER macro */
979static void NOINLINE 1378static void NOINLINE /* noinline so we have a fixed stackframe */
980transfer (pTHX_ struct coro *prev, struct coro *next) 1379transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
981{ 1380{
982 dSTACKLEVEL; 1381 dSTACKLEVEL;
983 1382
984 /* sometimes transfer is only called to set idle_sp */ 1383 /* sometimes transfer is only called to set idle_sp */
985 if (!next) 1384 if (expect_false (!prev))
986 { 1385 {
987 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1386 cctx_current->idle_sp = STACKLEVEL;
988 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1387 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
989 }
990 else if (prev != next)
991 { 1388 }
1389 else if (expect_true (prev != next))
1390 {
992 coro_cctx *prev__cctx; 1391 coro_cctx *cctx_prev;
993 1392
994 if (prev->flags & CF_NEW) 1393 if (expect_false (prev->flags & CF_NEW))
995 { 1394 {
996 /* create a new empty context */ 1395 /* create a new empty/source context */
997 Newz (0, prev->cctx, 1, coro_cctx);
998 prev->flags &= ~CF_NEW; 1396 prev->flags &= ~CF_NEW;
999 prev->flags |= CF_RUNNING; 1397 prev->flags |= CF_RUNNING;
1000 } 1398 }
1001 1399
1002 prev->flags &= ~CF_RUNNING; 1400 prev->flags &= ~CF_RUNNING;
1003 next->flags |= CF_RUNNING; 1401 next->flags |= CF_RUNNING;
1004 1402
1005 LOCK; 1403 /* first get rid of the old state */
1404 save_perl (aTHX_ prev);
1006 1405
1007 if (next->flags & CF_NEW) 1406 if (expect_false (next->flags & CF_NEW))
1008 { 1407 {
1009 /* need to start coroutine */ 1408 /* need to start coroutine */
1010 next->flags &= ~CF_NEW; 1409 next->flags &= ~CF_NEW;
1011 /* first get rid of the old state */
1012 save_perl (aTHX_ prev);
1013 /* setup coroutine call */ 1410 /* setup coroutine call */
1014 setup_coro (aTHX_ next); 1411 coro_setup (aTHX_ next);
1015 } 1412 }
1016 else 1413 else
1414 load_perl (aTHX_ next);
1415
1416 /* possibly untie and reuse the cctx */
1417 if (expect_true (
1418 cctx_current->idle_sp == STACKLEVEL
1419 && !(cctx_current->flags & CC_TRACE)
1420 && !force_cctx
1421 ))
1017 { 1422 {
1018 /* coroutine already started */ 1423 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1019 save_perl (aTHX_ prev); 1424 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1020 load_perl (aTHX_ next); 1425
1426 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1427 /* without this the next cctx_get might destroy the running cctx while still in use */
1428 if (expect_false (CCTX_EXPIRED (cctx_current)))
1429 if (expect_true (!next->cctx))
1430 next->cctx = cctx_get (aTHX);
1431
1432 cctx_put (cctx_current);
1021 } 1433 }
1434 else
1435 prev->cctx = cctx_current;
1022 1436
1023 prev__cctx = prev->cctx; 1437 ++next->usecount;
1024 1438
1025 /* possibly "free" the cctx */ 1439 cctx_prev = cctx_current;
1026 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1440 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1441
1442 next->cctx = 0;
1443
1444 if (expect_false (cctx_prev != cctx_current))
1027 { 1445 {
1028 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1446 cctx_prev->top_env = PL_top_env;
1029 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1447 PL_top_env = cctx_current->top_env;
1030 1448 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1031 prev->cctx = 0;
1032
1033 cctx_put (prev__cctx);
1034 } 1449 }
1035 1450
1036 ++next->usecount; 1451 transfer_tail (aTHX);
1037
1038 if (!next->cctx)
1039 next->cctx = cctx_get (aTHX);
1040
1041 if (prev__cctx != next->cctx)
1042 {
1043 prev__cctx->top_env = PL_top_env;
1044 PL_top_env = next->cctx->top_env;
1045 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1046 }
1047
1048 free_coro_mortal (aTHX);
1049 UNLOCK;
1050 } 1452 }
1051} 1453}
1052 1454
1053struct transfer_args
1054{
1055 struct coro *prev, *next;
1056};
1057
1058#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1455#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1059#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1456#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1060 1457
1061/** high level stuff ********************************************************/ 1458/** high level stuff ********************************************************/
1062 1459
1063static int 1460static int
1064coro_state_destroy (pTHX_ struct coro *coro) 1461coro_state_destroy (pTHX_ struct coro *coro)
1065{ 1462{
1066 if (coro->flags & CF_DESTROYED) 1463 if (coro->flags & CF_DESTROYED)
1067 return 0; 1464 return 0;
1465
1466 if (coro->on_destroy)
1467 coro->on_destroy (aTHX_ coro);
1068 1468
1069 coro->flags |= CF_DESTROYED; 1469 coro->flags |= CF_DESTROYED;
1070 1470
1071 if (coro->flags & CF_READY) 1471 if (coro->flags & CF_READY)
1072 { 1472 {
1073 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1473 /* reduce nready, as destroying a ready coro effectively unreadies it */
1074 /* alternative: look through all ready queues and remove the coro */ 1474 /* alternative: look through all ready queues and remove the coro */
1075 LOCK;
1076 --coro_nready; 1475 --coro_nready;
1077 UNLOCK;
1078 } 1476 }
1079 else 1477 else
1080 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1478 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1081 1479
1082 if (coro->mainstack && coro->mainstack != main_mainstack) 1480 if (coro->mainstack
1481 && coro->mainstack != main_mainstack
1482 && coro->slot
1483 && !PL_dirty)
1083 { 1484 {
1084 struct coro temp; 1485 struct coro temp;
1085 1486
1086 if (coro->flags & CF_RUNNING) 1487 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1087 croak ("FATAL: tried to destroy currently running coroutine");
1088
1089 Zero (&temp, 1, struct coro);
1090 temp.save = CORO_SAVE_ALL;
1091 1488
1092 save_perl (aTHX_ &temp); 1489 save_perl (aTHX_ &temp);
1093 load_perl (aTHX_ coro); 1490 load_perl (aTHX_ coro);
1094 1491
1095 coro_destroy_stacks (aTHX); 1492 coro_destruct_perl (aTHX_ coro);
1096 1493
1097 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1494 load_perl (aTHX_ &temp);
1098 1495
1099 coro->mainstack = 0; 1496 coro->slot = 0;
1100 } 1497 }
1101 1498
1102 cctx_destroy (coro->cctx); 1499 cctx_destroy (coro->cctx);
1500 SvREFCNT_dec (coro->startcv);
1103 SvREFCNT_dec (coro->args); 1501 SvREFCNT_dec (coro->args);
1502 SvREFCNT_dec (CORO_THROW);
1104 1503
1105 if (coro->next) coro->next->prev = coro->prev; 1504 if (coro->next) coro->next->prev = coro->prev;
1106 if (coro->prev) coro->prev->next = coro->next; 1505 if (coro->prev) coro->prev->next = coro->next;
1107 if (coro == coro_first) coro_first = coro->next; 1506 if (coro == coro_first) coro_first = coro->next;
1108 1507
… …
1146# define MGf_DUP 0 1545# define MGf_DUP 0
1147#endif 1546#endif
1148}; 1547};
1149 1548
1150static void 1549static void
1151prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1550prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1152{ 1551{
1153 ta->prev = SvSTATE (prev_sv); 1552 ta->prev = SvSTATE (prev_sv);
1154 ta->next = SvSTATE (next_sv); 1553 ta->next = SvSTATE (next_sv);
1155 TRANSFER_CHECK (*ta); 1554 TRANSFER_CHECK (*ta);
1156} 1555}
1157 1556
1158static void 1557static void
1159api_transfer (SV *prev_sv, SV *next_sv) 1558api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1160{ 1559{
1161 dTHX;
1162 struct transfer_args ta; 1560 struct coro_transfer_args ta;
1163 1561
1164 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1562 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1165 TRANSFER (ta); 1563 TRANSFER (ta, 1);
1166} 1564}
1167 1565
1168static int 1566/*****************************************************************************/
1169api_save (SV *coro_sv, int new_save) 1567/* gensub: simple closure generation utility */
1170{
1171 dTHX;
1172 struct coro *coro = SvSTATE (coro_sv);
1173 int old_save = coro->save;
1174 1568
1175 if (new_save >= 0) 1569#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1176 coro->save = new_save;
1177 1570
1178 return old_save; 1571/* create a closure from XS, returns a code reference */
1572/* the arg can be accessed via GENSUB_ARG from the callback */
1573/* the callback must use dXSARGS/XSRETURN */
1574static SV *
1575gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1576{
1577 CV *cv = (CV *)newSV (0);
1578
1579 sv_upgrade ((SV *)cv, SVt_PVCV);
1580
1581 CvANON_on (cv);
1582 CvISXSUB_on (cv);
1583 CvXSUB (cv) = xsub;
1584 GENSUB_ARG = arg;
1585
1586 return newRV_noinc ((SV *)cv);
1179} 1587}
1180 1588
1181/** Coro ********************************************************************/ 1589/** Coro ********************************************************************/
1182 1590
1183static void 1591INLINE void
1184coro_enq (pTHX_ SV *coro_sv) 1592coro_enq (pTHX_ struct coro *coro)
1185{ 1593{
1186 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1594 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1187} 1595}
1188 1596
1189static SV * 1597INLINE SV *
1190coro_deq (pTHX_ int min_prio) 1598coro_deq (pTHX)
1191{ 1599{
1192 int prio = PRIO_MAX - PRIO_MIN; 1600 int prio;
1193 1601
1194 min_prio -= PRIO_MIN;
1195 if (min_prio < 0)
1196 min_prio = 0;
1197
1198 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1602 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1199 if (AvFILLp (coro_ready [prio]) >= 0) 1603 if (AvFILLp (coro_ready [prio]) >= 0)
1200 return av_shift (coro_ready [prio]); 1604 return av_shift (coro_ready [prio]);
1201 1605
1202 return 0; 1606 return 0;
1203} 1607}
1204 1608
1205static int 1609static int
1206api_ready (SV *coro_sv) 1610api_ready (pTHX_ SV *coro_sv)
1207{ 1611{
1208 dTHX;
1209 struct coro *coro; 1612 struct coro *coro;
1210 1613 SV *sv_hook;
1211 if (SvROK (coro_sv)) 1614 void (*xs_hook)(void);
1212 coro_sv = SvRV (coro_sv);
1213 1615
1214 coro = SvSTATE (coro_sv); 1616 coro = SvSTATE (coro_sv);
1215 1617
1216 if (coro->flags & CF_READY) 1618 if (coro->flags & CF_READY)
1217 return 0; 1619 return 0;
1218 1620
1219 coro->flags |= CF_READY; 1621 coro->flags |= CF_READY;
1220 1622
1221 LOCK; 1623 sv_hook = coro_nready ? 0 : coro_readyhook;
1222 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1624 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1625
1626 coro_enq (aTHX_ coro);
1223 ++coro_nready; 1627 ++coro_nready;
1224 UNLOCK; 1628
1629 if (sv_hook)
1630 {
1631 dSP;
1632
1633 ENTER;
1634 SAVETMPS;
1635
1636 PUSHMARK (SP);
1637 PUTBACK;
1638 call_sv (sv_hook, G_VOID | G_DISCARD);
1639
1640 FREETMPS;
1641 LEAVE;
1642 }
1643
1644 if (xs_hook)
1645 xs_hook ();
1225 1646
1226 return 1; 1647 return 1;
1227} 1648}
1228 1649
1229static int 1650static int
1230api_is_ready (SV *coro_sv) 1651api_is_ready (pTHX_ SV *coro_sv)
1231{ 1652{
1232 dTHX;
1233 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1653 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1234} 1654}
1235 1655
1236static void 1656/* expects to own a reference to next->hv */
1657INLINE void
1237prepare_schedule (pTHX_ struct transfer_args *ta) 1658prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1238{ 1659{
1239 SV *prev_sv, *next_sv;
1240
1241 for (;;)
1242 {
1243 LOCK;
1244 next_sv = coro_deq (aTHX_ PRIO_MIN);
1245
1246 /* nothing to schedule: call the idle handler */
1247 if (!next_sv)
1248 {
1249 dSP;
1250 UNLOCK;
1251
1252 ENTER;
1253 SAVETMPS;
1254
1255 PUSHMARK (SP);
1256 PUTBACK;
1257 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1258
1259 FREETMPS;
1260 LEAVE;
1261 continue;
1262 }
1263
1264 ta->next = SvSTATE (next_sv);
1265
1266 /* cannot transfer to destroyed coros, skip and look for next */
1267 if (ta->next->flags & CF_DESTROYED)
1268 {
1269 UNLOCK;
1270 SvREFCNT_dec (next_sv);
1271 /* coro_nready is already taken care of by destroy */
1272 continue;
1273 }
1274
1275 --coro_nready;
1276 UNLOCK;
1277 break;
1278 }
1279
1280 /* free this only after the transfer */
1281 prev_sv = SvRV (coro_current); 1660 SV *prev_sv = SvRV (coro_current);
1661
1282 ta->prev = SvSTATE (prev_sv); 1662 ta->prev = SvSTATE_hv (prev_sv);
1663 ta->next = next;
1664
1283 TRANSFER_CHECK (*ta); 1665 TRANSFER_CHECK (*ta);
1284 assert (ta->next->flags & CF_READY); 1666
1285 ta->next->flags &= ~CF_READY;
1286 SvRV_set (coro_current, next_sv); 1667 SvRV_set (coro_current, (SV *)next->hv);
1287 1668
1288 LOCK;
1289 free_coro_mortal (aTHX); 1669 free_coro_mortal (aTHX);
1290 coro_mortal = prev_sv; 1670 coro_mortal = prev_sv;
1291 UNLOCK;
1292} 1671}
1293 1672
1294static void 1673static void
1674prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1675{
1676 for (;;)
1677 {
1678 SV *next_sv = coro_deq (aTHX);
1679
1680 if (expect_true (next_sv))
1681 {
1682 struct coro *next = SvSTATE_hv (next_sv);
1683
1684 /* cannot transfer to destroyed coros, skip and look for next */
1685 if (expect_false (next->flags & CF_DESTROYED))
1686 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1687 else
1688 {
1689 next->flags &= ~CF_READY;
1690 --coro_nready;
1691
1692 prepare_schedule_to (aTHX_ ta, next);
1693 break;
1694 }
1695 }
1696 else
1697 {
1698 /* nothing to schedule: call the idle handler */
1699 if (SvROK (sv_idle)
1700 && SvOBJECT (SvRV (sv_idle)))
1701 {
1702 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1703 api_ready (aTHX_ SvRV (sv_idle));
1704 --coro_nready;
1705 }
1706 else
1707 {
1708 dSP;
1709
1710 ENTER;
1711 SAVETMPS;
1712
1713 PUSHMARK (SP);
1714 PUTBACK;
1715 call_sv (sv_idle, G_VOID | G_DISCARD);
1716
1717 FREETMPS;
1718 LEAVE;
1719 }
1720 }
1721 }
1722}
1723
1724INLINE void
1295prepare_cede (pTHX_ struct transfer_args *ta) 1725prepare_cede (pTHX_ struct coro_transfer_args *ta)
1296{ 1726{
1297 api_ready (coro_current); 1727 api_ready (aTHX_ coro_current);
1298 prepare_schedule (aTHX_ ta); 1728 prepare_schedule (aTHX_ ta);
1299} 1729}
1300 1730
1731INLINE void
1732prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1733{
1734 SV *prev = SvRV (coro_current);
1735
1736 if (coro_nready)
1737 {
1738 prepare_schedule (aTHX_ ta);
1739 api_ready (aTHX_ prev);
1740 }
1741 else
1742 prepare_nop (aTHX_ ta);
1743}
1744
1745static void
1746api_schedule (pTHX)
1747{
1748 struct coro_transfer_args ta;
1749
1750 prepare_schedule (aTHX_ &ta);
1751 TRANSFER (ta, 1);
1752}
1753
1754static void
1755api_schedule_to (pTHX_ SV *coro_sv)
1756{
1757 struct coro_transfer_args ta;
1758 struct coro *next = SvSTATE (coro_sv);
1759
1760 SvREFCNT_inc_NN (coro_sv);
1761 prepare_schedule_to (aTHX_ &ta, next);
1762}
1763
1301static int 1764static int
1302prepare_cede_notself (pTHX_ struct transfer_args *ta) 1765api_cede (pTHX)
1303{ 1766{
1304 if (coro_nready) 1767 struct coro_transfer_args ta;
1305 { 1768
1306 SV *prev = SvRV (coro_current);
1307 prepare_schedule (aTHX_ ta); 1769 prepare_cede (aTHX_ &ta);
1308 api_ready (prev); 1770
1771 if (expect_true (ta.prev != ta.next))
1772 {
1773 TRANSFER (ta, 1);
1309 return 1; 1774 return 1;
1310 } 1775 }
1311 else 1776 else
1312 return 0; 1777 return 0;
1313} 1778}
1314 1779
1315static void
1316api_schedule (void)
1317{
1318 dTHX;
1319 struct transfer_args ta;
1320
1321 prepare_schedule (aTHX_ &ta);
1322 TRANSFER (ta);
1323}
1324
1325static int 1780static int
1326api_cede (void) 1781api_cede_notself (pTHX)
1327{ 1782{
1328 dTHX; 1783 if (coro_nready)
1784 {
1329 struct transfer_args ta; 1785 struct coro_transfer_args ta;
1330 1786
1331 prepare_cede (aTHX_ &ta); 1787 prepare_cede_notself (aTHX_ &ta);
1332
1333 if (ta.prev != ta.next)
1334 {
1335 TRANSFER (ta); 1788 TRANSFER (ta, 1);
1336 return 1; 1789 return 1;
1337 } 1790 }
1338 else 1791 else
1339 return 0; 1792 return 0;
1340} 1793}
1341 1794
1342static int 1795static void
1343api_cede_notself (void)
1344{
1345 dTHX;
1346 struct transfer_args ta;
1347
1348 if (prepare_cede_notself (aTHX_ &ta))
1349 {
1350 TRANSFER (ta);
1351 return 1;
1352 }
1353 else
1354 return 0;
1355}
1356
1357static void
1358api_trace (SV *coro_sv, int flags) 1796api_trace (pTHX_ SV *coro_sv, int flags)
1359{ 1797{
1360 dTHX;
1361 struct coro *coro = SvSTATE (coro_sv); 1798 struct coro *coro = SvSTATE (coro_sv);
1362 1799
1800 if (coro->flags & CF_RUNNING)
1801 croak ("cannot enable tracing on a running coroutine, caught");
1802
1363 if (flags & CC_TRACE) 1803 if (flags & CC_TRACE)
1364 { 1804 {
1365 if (!coro->cctx) 1805 if (!coro->cctx)
1366 coro->cctx = cctx_new (); 1806 coro->cctx = cctx_new_run ();
1367 else if (!(coro->cctx->flags & CC_TRACE)) 1807 else if (!(coro->cctx->flags & CC_TRACE))
1368 croak ("cannot enable tracing on coroutine with custom stack"); 1808 croak ("cannot enable tracing on coroutine with custom stack, caught");
1369 1809
1370 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1810 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1371 } 1811 }
1372 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1812 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1373 { 1813 {
1374 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL); 1814 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1375 1815
1376 if (coro->flags & CF_RUNNING) 1816 if (coro->flags & CF_RUNNING)
1377 PL_runops = RUNOPS_DEFAULT; 1817 PL_runops = RUNOPS_DEFAULT;
1378 else 1818 else
1379 coro->runops = RUNOPS_DEFAULT; 1819 coro->slot->runops = RUNOPS_DEFAULT;
1820 }
1821}
1822
1823static void
1824coro_call_on_destroy (pTHX_ struct coro *coro)
1825{
1826 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1827 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1828
1829 if (on_destroyp)
1830 {
1831 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1832
1833 while (AvFILLp (on_destroy) >= 0)
1834 {
1835 dSP; /* don't disturb outer sp */
1836 SV *cb = av_pop (on_destroy);
1837
1838 PUSHMARK (SP);
1839
1840 if (statusp)
1841 {
1842 int i;
1843 AV *status = (AV *)SvRV (*statusp);
1844 EXTEND (SP, AvFILLp (status) + 1);
1845
1846 for (i = 0; i <= AvFILLp (status); ++i)
1847 PUSHs (AvARRAY (status)[i]);
1848 }
1849
1850 PUTBACK;
1851 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1852 }
1853 }
1854}
1855
1856static void
1857slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1858{
1859 int i;
1860 HV *hv = (HV *)SvRV (coro_current);
1861 AV *av = newAV ();
1862
1863 av_extend (av, items - 1);
1864 for (i = 0; i < items; ++i)
1865 av_push (av, SvREFCNT_inc_NN (arg [i]));
1866
1867 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1868
1869 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1870 api_ready (aTHX_ sv_manager);
1871
1872 frame->prepare = prepare_schedule;
1873 frame->check = slf_check_repeat;
1874
1875 /* as a minor optimisation, we could unwind all stacks here */
1876 /* but that puts extra pressure on pp_slf, and is not worth much */
1877 /*coro_unwind_stacks (aTHX);*/
1878}
1879
1880/*****************************************************************************/
1881/* async pool handler */
1882
1883static int
1884slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1885{
1886 HV *hv = (HV *)SvRV (coro_current);
1887 struct coro *coro = (struct coro *)frame->data;
1888
1889 if (!coro->invoke_cb)
1890 return 1; /* loop till we have invoke */
1891 else
1892 {
1893 hv_store (hv, "desc", sizeof ("desc") - 1,
1894 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1895
1896 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1897
1898 {
1899 dSP;
1900 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1901 PUTBACK;
1380 } 1902 }
1903
1904 SvREFCNT_dec (GvAV (PL_defgv));
1905 GvAV (PL_defgv) = coro->invoke_av;
1906 coro->invoke_av = 0;
1907
1908 return 0;
1909 }
1381} 1910}
1911
1912static void
1913slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1914{
1915 HV *hv = (HV *)SvRV (coro_current);
1916 struct coro *coro = SvSTATE_hv ((SV *)hv);
1917
1918 if (expect_true (coro->saved_deffh))
1919 {
1920 /* subsequent iteration */
1921 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1922 coro->saved_deffh = 0;
1923
1924 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1925 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1926 {
1927 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1928 coro->invoke_av = newAV ();
1929
1930 frame->prepare = prepare_nop;
1931 }
1932 else
1933 {
1934 av_clear (GvAV (PL_defgv));
1935 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1936
1937 coro->prio = 0;
1938
1939 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1940 api_trace (aTHX_ coro_current, 0);
1941
1942 frame->prepare = prepare_schedule;
1943 av_push (av_async_pool, SvREFCNT_inc (hv));
1944 }
1945 }
1946 else
1947 {
1948 /* first iteration, simply fall through */
1949 frame->prepare = prepare_nop;
1950 }
1951
1952 frame->check = slf_check_pool_handler;
1953 frame->data = (void *)coro;
1954}
1955
1956/*****************************************************************************/
1957/* rouse callback */
1958
1959#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1960
1961static void
1962coro_rouse_callback (pTHX_ CV *cv)
1963{
1964 dXSARGS;
1965 SV *data = (SV *)GENSUB_ARG;
1966
1967 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1968 {
1969 /* first call, set args */
1970 AV *av = newAV ();
1971 SV *coro = SvRV (data);
1972
1973 SvRV_set (data, (SV *)av);
1974 api_ready (aTHX_ coro);
1975 SvREFCNT_dec (coro);
1976
1977 /* better take a full copy of the arguments */
1978 while (items--)
1979 av_store (av, items, newSVsv (ST (items)));
1980 }
1981
1982 XSRETURN_EMPTY;
1983}
1984
1985static int
1986slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1987{
1988 SV *data = (SV *)frame->data;
1989
1990 if (CORO_THROW)
1991 return 0;
1992
1993 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1994 return 1;
1995
1996 /* now push all results on the stack */
1997 {
1998 dSP;
1999 AV *av = (AV *)SvRV (data);
2000 int i;
2001
2002 EXTEND (SP, AvFILLp (av) + 1);
2003 for (i = 0; i <= AvFILLp (av); ++i)
2004 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2005
2006 /* we have stolen the elements, so ste length to zero and free */
2007 AvFILLp (av) = -1;
2008 av_undef (av);
2009
2010 PUTBACK;
2011 }
2012
2013 return 0;
2014}
2015
2016static void
2017slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2018{
2019 SV *cb;
2020
2021 if (items)
2022 cb = arg [0];
2023 else
2024 {
2025 struct coro *coro = SvSTATE_current;
2026
2027 if (!coro->rouse_cb)
2028 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2029
2030 cb = sv_2mortal (coro->rouse_cb);
2031 coro->rouse_cb = 0;
2032 }
2033
2034 if (!SvROK (cb)
2035 || SvTYPE (SvRV (cb)) != SVt_PVCV
2036 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2037 croak ("Coro::rouse_wait called with illegal callback argument,");
2038
2039 {
2040 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2041 SV *data = (SV *)GENSUB_ARG;
2042
2043 frame->data = (void *)data;
2044 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2045 frame->check = slf_check_rouse_wait;
2046 }
2047}
2048
2049static SV *
2050coro_new_rouse_cb (pTHX)
2051{
2052 HV *hv = (HV *)SvRV (coro_current);
2053 struct coro *coro = SvSTATE_hv (hv);
2054 SV *data = newRV_inc ((SV *)hv);
2055 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2056
2057 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2058 SvREFCNT_dec (data); /* magicext increases the refcount */
2059
2060 SvREFCNT_dec (coro->rouse_cb);
2061 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2062
2063 return cb;
2064}
2065
2066/*****************************************************************************/
2067/* schedule-like-function opcode (SLF) */
2068
2069static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2070static const CV *slf_cv;
2071static SV **slf_argv;
2072static int slf_argc, slf_arga; /* count, allocated */
2073static I32 slf_ax; /* top of stack, for restore */
2074
2075/* this restores the stack in the case we patched the entersub, to */
2076/* recreate the stack frame as perl will on following calls */
2077/* since entersub cleared the stack */
2078static OP *
2079pp_restore (pTHX)
2080{
2081 int i;
2082 SV **SP = PL_stack_base + slf_ax;
2083
2084 PUSHMARK (SP);
2085
2086 EXTEND (SP, slf_argc + 1);
2087
2088 for (i = 0; i < slf_argc; ++i)
2089 PUSHs (sv_2mortal (slf_argv [i]));
2090
2091 PUSHs ((SV *)CvGV (slf_cv));
2092
2093 RETURNOP (slf_restore.op_first);
2094}
2095
2096static void
2097slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2098{
2099 SV **arg = (SV **)slf_frame.data;
2100
2101 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2102}
2103
2104static void
2105slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 if (items != 2)
2108 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2109
2110 frame->prepare = slf_prepare_transfer;
2111 frame->check = slf_check_nop;
2112 frame->data = (void *)arg; /* let's hope it will stay valid */
2113}
2114
2115static void
2116slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2117{
2118 frame->prepare = prepare_schedule;
2119 frame->check = slf_check_nop;
2120}
2121
2122static void
2123slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2124{
2125 struct coro *next = (struct coro *)slf_frame.data;
2126
2127 SvREFCNT_inc_NN (next->hv);
2128 prepare_schedule_to (aTHX_ ta, next);
2129}
2130
2131static void
2132slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 if (!items)
2135 croak ("Coro::schedule_to expects a coroutine argument, caught");
2136
2137 frame->data = (void *)SvSTATE (arg [0]);
2138 frame->prepare = slf_prepare_schedule_to;
2139 frame->check = slf_check_nop;
2140}
2141
2142static void
2143slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2144{
2145 api_ready (aTHX_ SvRV (coro_current));
2146
2147 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2148}
2149
2150static void
2151slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 frame->prepare = prepare_cede;
2154 frame->check = slf_check_nop;
2155}
2156
2157static void
2158slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2159{
2160 frame->prepare = prepare_cede_notself;
2161 frame->check = slf_check_nop;
2162}
2163
2164/*
2165 * these not obviously related functions are all rolled into one
2166 * function to increase chances that they all will call transfer with the same
2167 * stack offset
2168 * SLF stands for "schedule-like-function".
2169 */
2170static OP *
2171pp_slf (pTHX)
2172{
2173 I32 checkmark; /* mark SP to see how many elements check has pushed */
2174
2175 /* set up the slf frame, unless it has already been set-up */
2176 /* the latter happens when a new coro has been started */
2177 /* or when a new cctx was attached to an existing coroutine */
2178 if (expect_true (!slf_frame.prepare))
2179 {
2180 /* first iteration */
2181 dSP;
2182 SV **arg = PL_stack_base + TOPMARK + 1;
2183 int items = SP - arg; /* args without function object */
2184 SV *gv = *sp;
2185
2186 /* do a quick consistency check on the "function" object, and if it isn't */
2187 /* for us, divert to the real entersub */
2188 if (SvTYPE (gv) != SVt_PVGV
2189 || !GvCV (gv)
2190 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2191 return PL_ppaddr[OP_ENTERSUB](aTHX);
2192
2193 if (!(PL_op->op_flags & OPf_STACKED))
2194 {
2195 /* ampersand-form of call, use @_ instead of stack */
2196 AV *av = GvAV (PL_defgv);
2197 arg = AvARRAY (av);
2198 items = AvFILLp (av) + 1;
2199 }
2200
2201 /* now call the init function, which needs to set up slf_frame */
2202 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2203 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2204
2205 /* pop args */
2206 SP = PL_stack_base + POPMARK;
2207
2208 PUTBACK;
2209 }
2210
2211 /* now that we have a slf_frame, interpret it! */
2212 /* we use a callback system not to make the code needlessly */
2213 /* complicated, but so we can run multiple perl coros from one cctx */
2214
2215 do
2216 {
2217 struct coro_transfer_args ta;
2218
2219 slf_frame.prepare (aTHX_ &ta);
2220 TRANSFER (ta, 0);
2221
2222 checkmark = PL_stack_sp - PL_stack_base;
2223 }
2224 while (slf_frame.check (aTHX_ &slf_frame));
2225
2226 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2227
2228 /* exception handling */
2229 if (expect_false (CORO_THROW))
2230 {
2231 SV *exception = sv_2mortal (CORO_THROW);
2232
2233 CORO_THROW = 0;
2234 sv_setsv (ERRSV, exception);
2235 croak (0);
2236 }
2237
2238 /* return value handling - mostly like entersub */
2239 /* make sure we put something on the stack in scalar context */
2240 if (GIMME_V == G_SCALAR)
2241 {
2242 dSP;
2243 SV **bot = PL_stack_base + checkmark;
2244
2245 if (sp == bot) /* too few, push undef */
2246 bot [1] = &PL_sv_undef;
2247 else if (sp != bot + 1) /* too many, take last one */
2248 bot [1] = *sp;
2249
2250 SP = bot + 1;
2251
2252 PUTBACK;
2253 }
2254
2255 return NORMAL;
2256}
2257
2258static void
2259api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2260{
2261 int i;
2262 SV **arg = PL_stack_base + ax;
2263 int items = PL_stack_sp - arg + 1;
2264
2265 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2266
2267 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2268 && PL_op->op_ppaddr != pp_slf)
2269 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2270
2271 CvFLAGS (cv) |= CVf_SLF;
2272 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2273 slf_cv = cv;
2274
2275 /* we patch the op, and then re-run the whole call */
2276 /* we have to put the same argument on the stack for this to work */
2277 /* and this will be done by pp_restore */
2278 slf_restore.op_next = (OP *)&slf_restore;
2279 slf_restore.op_type = OP_CUSTOM;
2280 slf_restore.op_ppaddr = pp_restore;
2281 slf_restore.op_first = PL_op;
2282
2283 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2284
2285 if (PL_op->op_flags & OPf_STACKED)
2286 {
2287 if (items > slf_arga)
2288 {
2289 slf_arga = items;
2290 free (slf_argv);
2291 slf_argv = malloc (slf_arga * sizeof (SV *));
2292 }
2293
2294 slf_argc = items;
2295
2296 for (i = 0; i < items; ++i)
2297 slf_argv [i] = SvREFCNT_inc (arg [i]);
2298 }
2299 else
2300 slf_argc = 0;
2301
2302 PL_op->op_ppaddr = pp_slf;
2303 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2304
2305 PL_op = (OP *)&slf_restore;
2306}
2307
2308/*****************************************************************************/
2309/* PerlIO::cede */
2310
2311typedef struct
2312{
2313 PerlIOBuf base;
2314 NV next, every;
2315} PerlIOCede;
2316
2317static IV
2318PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2319{
2320 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2321
2322 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2323 self->next = nvtime () + self->every;
2324
2325 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2326}
2327
2328static SV *
2329PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2330{
2331 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2332
2333 return newSVnv (self->every);
2334}
2335
2336static IV
2337PerlIOCede_flush (pTHX_ PerlIO *f)
2338{
2339 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2340 double now = nvtime ();
2341
2342 if (now >= self->next)
2343 {
2344 api_cede (aTHX);
2345 self->next = now + self->every;
2346 }
2347
2348 return PerlIOBuf_flush (aTHX_ f);
2349}
2350
2351static PerlIO_funcs PerlIO_cede =
2352{
2353 sizeof(PerlIO_funcs),
2354 "cede",
2355 sizeof(PerlIOCede),
2356 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2357 PerlIOCede_pushed,
2358 PerlIOBuf_popped,
2359 PerlIOBuf_open,
2360 PerlIOBase_binmode,
2361 PerlIOCede_getarg,
2362 PerlIOBase_fileno,
2363 PerlIOBuf_dup,
2364 PerlIOBuf_read,
2365 PerlIOBuf_unread,
2366 PerlIOBuf_write,
2367 PerlIOBuf_seek,
2368 PerlIOBuf_tell,
2369 PerlIOBuf_close,
2370 PerlIOCede_flush,
2371 PerlIOBuf_fill,
2372 PerlIOBase_eof,
2373 PerlIOBase_error,
2374 PerlIOBase_clearerr,
2375 PerlIOBase_setlinebuf,
2376 PerlIOBuf_get_base,
2377 PerlIOBuf_bufsiz,
2378 PerlIOBuf_get_ptr,
2379 PerlIOBuf_get_cnt,
2380 PerlIOBuf_set_ptrcnt,
2381};
2382
2383/*****************************************************************************/
2384/* Coro::Semaphore & Coro::Signal */
2385
2386static SV *
2387coro_waitarray_new (pTHX_ int count)
2388{
2389 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2390 AV *av = newAV ();
2391 SV **ary;
2392
2393 /* unfortunately, building manually saves memory */
2394 Newx (ary, 2, SV *);
2395 AvALLOC (av) = ary;
2396#if PERL_VERSION_ATLEAST (5,10,0)
2397 AvARRAY (av) = ary;
2398#else
2399 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2400 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2401 SvPVX ((SV *)av) = (char *)ary;
2402#endif
2403 AvMAX (av) = 1;
2404 AvFILLp (av) = 0;
2405 ary [0] = newSViv (count);
2406
2407 return newRV_noinc ((SV *)av);
2408}
2409
2410/* semaphore */
2411
2412static void
2413coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2414{
2415 SV *count_sv = AvARRAY (av)[0];
2416 IV count = SvIVX (count_sv);
2417
2418 count += adjust;
2419 SvIVX (count_sv) = count;
2420
2421 /* now wake up as many waiters as are expected to lock */
2422 while (count > 0 && AvFILLp (av) > 0)
2423 {
2424 SV *cb;
2425
2426 /* swap first two elements so we can shift a waiter */
2427 AvARRAY (av)[0] = AvARRAY (av)[1];
2428 AvARRAY (av)[1] = count_sv;
2429 cb = av_shift (av);
2430
2431 if (SvOBJECT (cb))
2432 {
2433 api_ready (aTHX_ cb);
2434 --count;
2435 }
2436 else if (SvTYPE (cb) == SVt_PVCV)
2437 {
2438 dSP;
2439 PUSHMARK (SP);
2440 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2441 PUTBACK;
2442 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2443 }
2444
2445 SvREFCNT_dec (cb);
2446 }
2447}
2448
2449static void
2450coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2451{
2452 /* call $sem->adjust (0) to possibly wake up some other waiters */
2453 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2454}
2455
2456static int
2457slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2458{
2459 AV *av = (AV *)frame->data;
2460 SV *count_sv = AvARRAY (av)[0];
2461
2462 /* if we are about to throw, don't actually acquire the lock, just throw */
2463 if (CORO_THROW)
2464 return 0;
2465 else if (SvIVX (count_sv) > 0)
2466 {
2467 SvSTATE_current->on_destroy = 0;
2468
2469 if (acquire)
2470 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2471 else
2472 coro_semaphore_adjust (aTHX_ av, 0);
2473
2474 return 0;
2475 }
2476 else
2477 {
2478 int i;
2479 /* if we were woken up but can't down, we look through the whole */
2480 /* waiters list and only add us if we aren't in there already */
2481 /* this avoids some degenerate memory usage cases */
2482
2483 for (i = 1; i <= AvFILLp (av); ++i)
2484 if (AvARRAY (av)[i] == SvRV (coro_current))
2485 return 1;
2486
2487 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2488 return 1;
2489 }
2490}
2491
2492static int
2493slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2494{
2495 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2496}
2497
2498static int
2499slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2500{
2501 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2502}
2503
2504static void
2505slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2506{
2507 AV *av = (AV *)SvRV (arg [0]);
2508
2509 if (SvIVX (AvARRAY (av)[0]) > 0)
2510 {
2511 frame->data = (void *)av;
2512 frame->prepare = prepare_nop;
2513 }
2514 else
2515 {
2516 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2517
2518 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2519 frame->prepare = prepare_schedule;
2520
2521 /* to avoid race conditions when a woken-up coro gets terminated */
2522 /* we arrange for a temporary on_destroy that calls adjust (0) */
2523 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2524 }
2525}
2526
2527static void
2528slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2529{
2530 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2531 frame->check = slf_check_semaphore_down;
2532}
2533
2534static void
2535slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2536{
2537 if (items >= 2)
2538 {
2539 /* callback form */
2540 AV *av = (AV *)SvRV (arg [0]);
2541 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2542
2543 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2544
2545 if (SvIVX (AvARRAY (av)[0]) > 0)
2546 coro_semaphore_adjust (aTHX_ av, 0);
2547
2548 frame->prepare = prepare_nop;
2549 frame->check = slf_check_nop;
2550 }
2551 else
2552 {
2553 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2554 frame->check = slf_check_semaphore_wait;
2555 }
2556}
2557
2558/* signal */
2559
2560static void
2561coro_signal_wake (pTHX_ AV *av, int count)
2562{
2563 SvIVX (AvARRAY (av)[0]) = 0;
2564
2565 /* now signal count waiters */
2566 while (count > 0 && AvFILLp (av) > 0)
2567 {
2568 SV *cb;
2569
2570 /* swap first two elements so we can shift a waiter */
2571 cb = AvARRAY (av)[0];
2572 AvARRAY (av)[0] = AvARRAY (av)[1];
2573 AvARRAY (av)[1] = cb;
2574
2575 cb = av_shift (av);
2576
2577 api_ready (aTHX_ cb);
2578 sv_setiv (cb, 0); /* signal waiter */
2579 SvREFCNT_dec (cb);
2580
2581 --count;
2582 }
2583}
2584
2585static int
2586slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2587{
2588 /* if we are about to throw, also stop waiting */
2589 return SvROK ((SV *)frame->data) && !CORO_THROW;
2590}
2591
2592static void
2593slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2594{
2595 AV *av = (AV *)SvRV (arg [0]);
2596
2597 if (SvIVX (AvARRAY (av)[0]))
2598 {
2599 SvIVX (AvARRAY (av)[0]) = 0;
2600 frame->prepare = prepare_nop;
2601 frame->check = slf_check_nop;
2602 }
2603 else
2604 {
2605 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2606
2607 av_push (av, waiter);
2608
2609 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2610 frame->prepare = prepare_schedule;
2611 frame->check = slf_check_signal_wait;
2612 }
2613}
2614
2615/*****************************************************************************/
2616/* Coro::AIO */
2617
2618#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2619
2620/* helper storage struct */
2621struct io_state
2622{
2623 int errorno;
2624 I32 laststype; /* U16 in 5.10.0 */
2625 int laststatval;
2626 Stat_t statcache;
2627};
2628
2629static void
2630coro_aio_callback (pTHX_ CV *cv)
2631{
2632 dXSARGS;
2633 AV *state = (AV *)GENSUB_ARG;
2634 SV *coro = av_pop (state);
2635 SV *data_sv = newSV (sizeof (struct io_state));
2636
2637 av_extend (state, items - 1);
2638
2639 sv_upgrade (data_sv, SVt_PV);
2640 SvCUR_set (data_sv, sizeof (struct io_state));
2641 SvPOK_only (data_sv);
2642
2643 {
2644 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2645
2646 data->errorno = errno;
2647 data->laststype = PL_laststype;
2648 data->laststatval = PL_laststatval;
2649 data->statcache = PL_statcache;
2650 }
2651
2652 /* now build the result vector out of all the parameters and the data_sv */
2653 {
2654 int i;
2655
2656 for (i = 0; i < items; ++i)
2657 av_push (state, SvREFCNT_inc_NN (ST (i)));
2658 }
2659
2660 av_push (state, data_sv);
2661
2662 api_ready (aTHX_ coro);
2663 SvREFCNT_dec (coro);
2664 SvREFCNT_dec ((AV *)state);
2665}
2666
2667static int
2668slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2669{
2670 AV *state = (AV *)frame->data;
2671
2672 /* if we are about to throw, return early */
2673 /* this does not cancel the aio request, but at least */
2674 /* it quickly returns */
2675 if (CORO_THROW)
2676 return 0;
2677
2678 /* one element that is an RV? repeat! */
2679 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2680 return 1;
2681
2682 /* restore status */
2683 {
2684 SV *data_sv = av_pop (state);
2685 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2686
2687 errno = data->errorno;
2688 PL_laststype = data->laststype;
2689 PL_laststatval = data->laststatval;
2690 PL_statcache = data->statcache;
2691
2692 SvREFCNT_dec (data_sv);
2693 }
2694
2695 /* push result values */
2696 {
2697 dSP;
2698 int i;
2699
2700 EXTEND (SP, AvFILLp (state) + 1);
2701 for (i = 0; i <= AvFILLp (state); ++i)
2702 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2703
2704 PUTBACK;
2705 }
2706
2707 return 0;
2708}
2709
2710static void
2711slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2712{
2713 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2714 SV *coro_hv = SvRV (coro_current);
2715 struct coro *coro = SvSTATE_hv (coro_hv);
2716
2717 /* put our coroutine id on the state arg */
2718 av_push (state, SvREFCNT_inc_NN (coro_hv));
2719
2720 /* first see whether we have a non-zero priority and set it as AIO prio */
2721 if (coro->prio)
2722 {
2723 dSP;
2724
2725 static SV *prio_cv;
2726 static SV *prio_sv;
2727
2728 if (expect_false (!prio_cv))
2729 {
2730 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2731 prio_sv = newSViv (0);
2732 }
2733
2734 PUSHMARK (SP);
2735 sv_setiv (prio_sv, coro->prio);
2736 XPUSHs (prio_sv);
2737
2738 PUTBACK;
2739 call_sv (prio_cv, G_VOID | G_DISCARD);
2740 }
2741
2742 /* now call the original request */
2743 {
2744 dSP;
2745 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2746 int i;
2747
2748 PUSHMARK (SP);
2749
2750 /* first push all args to the stack */
2751 EXTEND (SP, items + 1);
2752
2753 for (i = 0; i < items; ++i)
2754 PUSHs (arg [i]);
2755
2756 /* now push the callback closure */
2757 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2758
2759 /* now call the AIO function - we assume our request is uncancelable */
2760 PUTBACK;
2761 call_sv ((SV *)req, G_VOID | G_DISCARD);
2762 }
2763
2764 /* now that the requets is going, we loop toll we have a result */
2765 frame->data = (void *)state;
2766 frame->prepare = prepare_schedule;
2767 frame->check = slf_check_aio_req;
2768}
2769
2770static void
2771coro_aio_req_xs (pTHX_ CV *cv)
2772{
2773 dXSARGS;
2774
2775 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2776
2777 XSRETURN_EMPTY;
2778}
2779
2780/*****************************************************************************/
2781
2782#if CORO_CLONE
2783# include "clone.c"
2784#endif
1382 2785
1383MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2786MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1384 2787
1385PROTOTYPES: DISABLE 2788PROTOTYPES: DISABLE
1386 2789
1387BOOT: 2790BOOT:
1388{ 2791{
1389#ifdef USE_ITHREADS 2792#ifdef USE_ITHREADS
1390 MUTEX_INIT (&coro_mutex); 2793# if CORO_PTHREAD
2794 coro_thx = PERL_GET_CONTEXT;
2795# endif
1391#endif 2796#endif
1392 BOOT_PAGESIZE; 2797 BOOT_PAGESIZE;
2798
2799 cctx_current = cctx_new_empty ();
2800
2801 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2802 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2803
2804 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2805 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2806 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2807
2808 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2809 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2810 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1393 2811
1394 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2812 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1395 2813
1396 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2814 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1397 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2815 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1398 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 2816 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1399 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 2817 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1400 2818
1401 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1402 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1403 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1404 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1405 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1406 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1407 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1408
1409 main_mainstack = PL_mainstack; 2819 main_mainstack = PL_mainstack;
1410 main_top_env = PL_top_env; 2820 main_top_env = PL_top_env;
1411 2821
1412 while (main_top_env->je_prev) 2822 while (main_top_env->je_prev)
1413 main_top_env = main_top_env->je_prev; 2823 main_top_env = main_top_env->je_prev;
1414 2824
2825 {
2826 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2827
2828 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2829 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2830
2831 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2832 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2833 }
2834
1415 coroapi.ver = CORO_API_VERSION; 2835 coroapi.ver = CORO_API_VERSION;
2836 coroapi.rev = CORO_API_REVISION;
2837
1416 coroapi.transfer = api_transfer; 2838 coroapi.transfer = api_transfer;
2839
2840 coroapi.sv_state = SvSTATE_;
2841 coroapi.execute_slf = api_execute_slf;
2842 coroapi.prepare_nop = prepare_nop;
2843 coroapi.prepare_schedule = prepare_schedule;
2844 coroapi.prepare_cede = prepare_cede;
2845 coroapi.prepare_cede_notself = prepare_cede_notself;
2846
2847 {
2848 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2849
2850 if (!svp) croak ("Time::HiRes is required");
2851 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2852
2853 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2854 }
1417 2855
1418 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2856 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1419} 2857}
1420 2858
1421SV * 2859SV *
1422new (char *klass, ...) 2860new (char *klass, ...)
2861 ALIAS:
2862 Coro::new = 1
1423 CODE: 2863 CODE:
1424{ 2864{
1425 struct coro *coro; 2865 struct coro *coro;
2866 MAGIC *mg;
1426 HV *hv; 2867 HV *hv;
2868 CV *cb;
1427 int i; 2869 int i;
1428 2870
2871 if (items > 1)
2872 {
2873 cb = coro_sv_2cv (aTHX_ ST (1));
2874
2875 if (!ix)
2876 {
2877 if (CvISXSUB (cb))
2878 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2879
2880 if (!CvROOT (cb))
2881 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2882 }
2883 }
2884
1429 Newz (0, coro, 1, struct coro); 2885 Newz (0, coro, 1, struct coro);
1430 coro->args = newAV (); 2886 coro->args = newAV ();
1431 coro->save = CORO_SAVE_DEF;
1432 coro->flags = CF_NEW; 2887 coro->flags = CF_NEW;
1433 2888
1434 if (coro_first) coro_first->prev = coro; 2889 if (coro_first) coro_first->prev = coro;
1435 coro->next = coro_first; 2890 coro->next = coro_first;
1436 coro_first = coro; 2891 coro_first = coro;
1437 2892
1438 coro->hv = hv = newHV (); 2893 coro->hv = hv = newHV ();
1439 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2894 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2895 mg->mg_flags |= MGf_DUP;
1440 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2896 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1441 2897
2898 if (items > 1)
2899 {
2900 av_extend (coro->args, items - 1 + ix - 1);
2901
2902 if (ix)
2903 {
2904 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2905 cb = cv_coro_run;
2906 }
2907
2908 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2909
1442 for (i = 1; i < items; i++) 2910 for (i = 2; i < items; i++)
1443 av_push (coro->args, newSVsv (ST (i))); 2911 av_push (coro->args, newSVsv (ST (i)));
2912 }
1444} 2913}
1445 OUTPUT: 2914 OUTPUT:
1446 RETVAL 2915 RETVAL
1447 2916
1448int 2917void
1449save (SV *coro, int new_save = -1) 2918transfer (...)
2919 PROTOTYPE: $$
1450 CODE: 2920 CODE:
1451 RETVAL = api_save (coro, new_save); 2921 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1452 OUTPUT:
1453 RETVAL
1454
1455int
1456save_also (SV *coro_sv, int save_also)
1457 CODE:
1458{
1459 struct coro *coro = SvSTATE (coro_sv);
1460 RETVAL = coro->save;
1461 coro->save |= save_also;
1462}
1463 OUTPUT:
1464 RETVAL
1465
1466# these not obviously related functions are all rolled into the same xs
1467# function to increase chances that they all will call transfer with the same
1468# stack offset
1469void
1470_set_stacklevel (...)
1471 ALIAS:
1472 Coro::State::transfer = 1
1473 Coro::schedule = 2
1474 Coro::cede = 3
1475 Coro::cede_notself = 4
1476 CODE:
1477{
1478 struct transfer_args ta;
1479
1480 switch (ix)
1481 {
1482 case 0:
1483 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1484 ta.next = 0;
1485 break;
1486
1487 case 1:
1488 if (items != 2)
1489 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1490
1491 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1492 break;
1493
1494 case 2:
1495 prepare_schedule (aTHX_ &ta);
1496 break;
1497
1498 case 3:
1499 prepare_cede (aTHX_ &ta);
1500 break;
1501
1502 case 4:
1503 if (!prepare_cede_notself (aTHX_ &ta))
1504 XSRETURN_EMPTY;
1505
1506 break;
1507 }
1508
1509 BARRIER;
1510 TRANSFER (ta);
1511
1512 if (GIMME_V != G_VOID && ta.next != ta.prev)
1513 XSRETURN_YES;
1514}
1515 2922
1516bool 2923bool
1517_destroy (SV *coro_sv) 2924_destroy (SV *coro_sv)
1518 CODE: 2925 CODE:
1519 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2926 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1520 OUTPUT: 2927 OUTPUT:
1521 RETVAL 2928 RETVAL
1522 2929
1523void 2930void
1524_exit (code) 2931_exit (int code)
1525 int code
1526 PROTOTYPE: $ 2932 PROTOTYPE: $
1527 CODE: 2933 CODE:
1528 _exit (code); 2934 _exit (code);
1529 2935
2936SV *
2937clone (Coro::State coro)
2938 CODE:
2939{
2940#if CORO_CLONE
2941 struct coro *ncoro = coro_clone (aTHX_ coro);
2942 MAGIC *mg;
2943 /* TODO: too much duplication */
2944 ncoro->hv = newHV ();
2945 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2946 mg->mg_flags |= MGf_DUP;
2947 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2948#else
2949 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2950#endif
2951}
2952 OUTPUT:
2953 RETVAL
2954
1530int 2955int
1531cctx_stacksize (int new_stacksize = 0) 2956cctx_stacksize (int new_stacksize = 0)
2957 PROTOTYPE: ;$
1532 CODE: 2958 CODE:
1533 RETVAL = coro_stacksize; 2959 RETVAL = cctx_stacksize;
1534 if (new_stacksize) 2960 if (new_stacksize)
2961 {
1535 coro_stacksize = new_stacksize; 2962 cctx_stacksize = new_stacksize;
2963 ++cctx_gen;
2964 }
1536 OUTPUT: 2965 OUTPUT:
1537 RETVAL 2966 RETVAL
1538 2967
1539int 2968int
2969cctx_max_idle (int max_idle = 0)
2970 PROTOTYPE: ;$
2971 CODE:
2972 RETVAL = cctx_max_idle;
2973 if (max_idle > 1)
2974 cctx_max_idle = max_idle;
2975 OUTPUT:
2976 RETVAL
2977
2978int
1540cctx_count () 2979cctx_count ()
2980 PROTOTYPE:
1541 CODE: 2981 CODE:
1542 RETVAL = cctx_count; 2982 RETVAL = cctx_count;
1543 OUTPUT: 2983 OUTPUT:
1544 RETVAL 2984 RETVAL
1545 2985
1546int 2986int
1547cctx_idle () 2987cctx_idle ()
2988 PROTOTYPE:
1548 CODE: 2989 CODE:
1549 RETVAL = cctx_idle; 2990 RETVAL = cctx_idle;
1550 OUTPUT: 2991 OUTPUT:
1551 RETVAL 2992 RETVAL
1552 2993
1553void 2994void
1554list () 2995list ()
2996 PROTOTYPE:
1555 PPCODE: 2997 PPCODE:
1556{ 2998{
1557 struct coro *coro; 2999 struct coro *coro;
1558 for (coro = coro_first; coro; coro = coro->next) 3000 for (coro = coro_first; coro; coro = coro->next)
1559 if (coro->hv) 3001 if (coro->hv)
… …
1564call (Coro::State coro, SV *coderef) 3006call (Coro::State coro, SV *coderef)
1565 ALIAS: 3007 ALIAS:
1566 eval = 1 3008 eval = 1
1567 CODE: 3009 CODE:
1568{ 3010{
1569 if (coro->mainstack) 3011 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1570 { 3012 {
1571 struct coro temp; 3013 struct coro temp;
1572 Zero (&temp, 1, struct coro);
1573 temp.save = CORO_SAVE_ALL;
1574 3014
1575 if (!(coro->flags & CF_RUNNING)) 3015 if (!(coro->flags & CF_RUNNING))
1576 { 3016 {
3017 PUTBACK;
1577 save_perl (aTHX_ &temp); 3018 save_perl (aTHX_ &temp);
1578 load_perl (aTHX_ coro); 3019 load_perl (aTHX_ coro);
1579 } 3020 }
1580 3021
1581 { 3022 {
1582 dSP; 3023 dSP;
1583 ENTER; 3024 ENTER;
1584 SAVETMPS; 3025 SAVETMPS;
3026 PUTBACK;
3027 PUSHSTACK;
1585 PUSHMARK (SP); 3028 PUSHMARK (SP);
1586 PUTBACK; 3029
1587 if (ix) 3030 if (ix)
1588 eval_sv (coderef, 0); 3031 eval_sv (coderef, 0);
1589 else 3032 else
1590 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3033 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3034
3035 POPSTACK;
1591 SPAGAIN; 3036 SPAGAIN;
1592 FREETMPS; 3037 FREETMPS;
1593 LEAVE; 3038 LEAVE;
1594 PUTBACK; 3039 PUTBACK;
1595 } 3040 }
1596 3041
1597 if (!(coro->flags & CF_RUNNING)) 3042 if (!(coro->flags & CF_RUNNING))
1598 { 3043 {
1599 save_perl (aTHX_ coro); 3044 save_perl (aTHX_ coro);
1600 load_perl (aTHX_ &temp); 3045 load_perl (aTHX_ &temp);
3046 SPAGAIN;
1601 } 3047 }
1602 } 3048 }
1603} 3049}
1604 3050
1605SV * 3051SV *
… …
1614 RETVAL = boolSV (coro->flags & ix); 3060 RETVAL = boolSV (coro->flags & ix);
1615 OUTPUT: 3061 OUTPUT:
1616 RETVAL 3062 RETVAL
1617 3063
1618void 3064void
3065throw (Coro::State self, SV *throw = &PL_sv_undef)
3066 PROTOTYPE: $;$
3067 CODE:
3068{
3069 struct coro *current = SvSTATE_current;
3070 SV **throwp = self == current ? &CORO_THROW : &self->except;
3071 SvREFCNT_dec (*throwp);
3072 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3073}
3074
3075void
1619api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3076api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3077 PROTOTYPE: $;$
3078 C_ARGS: aTHX_ coro, flags
1620 3079
1621SV * 3080SV *
1622has_stack (Coro::State coro) 3081has_cctx (Coro::State coro)
1623 PROTOTYPE: $ 3082 PROTOTYPE: $
1624 CODE: 3083 CODE:
1625 RETVAL = boolSV (!!coro->cctx); 3084 /* maybe manage the running flag differently */
3085 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1626 OUTPUT: 3086 OUTPUT:
1627 RETVAL 3087 RETVAL
1628 3088
1629int 3089int
1630is_traced (Coro::State coro) 3090is_traced (Coro::State coro)
… …
1632 CODE: 3092 CODE:
1633 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3093 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1634 OUTPUT: 3094 OUTPUT:
1635 RETVAL 3095 RETVAL
1636 3096
1637IV 3097UV
1638rss (Coro::State coro) 3098rss (Coro::State coro)
1639 PROTOTYPE: $ 3099 PROTOTYPE: $
1640 ALIAS: 3100 ALIAS:
1641 usecount = 1 3101 usecount = 1
1642 CODE: 3102 CODE:
… …
1646 case 1: RETVAL = coro->usecount; break; 3106 case 1: RETVAL = coro->usecount; break;
1647 } 3107 }
1648 OUTPUT: 3108 OUTPUT:
1649 RETVAL 3109 RETVAL
1650 3110
3111void
3112force_cctx ()
3113 PROTOTYPE:
3114 CODE:
3115 cctx_current->idle_sp = 0;
3116
3117void
3118swap_defsv (Coro::State self)
3119 PROTOTYPE: $
3120 ALIAS:
3121 swap_defav = 1
3122 CODE:
3123 if (!self->slot)
3124 croak ("cannot swap state with coroutine that has no saved state,");
3125 else
3126 {
3127 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3128 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3129
3130 SV *tmp = *src; *src = *dst; *dst = tmp;
3131 }
3132
1651 3133
1652MODULE = Coro::State PACKAGE = Coro 3134MODULE = Coro::State PACKAGE = Coro
1653 3135
1654BOOT: 3136BOOT:
1655{ 3137{
1656 int i; 3138 int i;
1657 3139
1658 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3140 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1659 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3141 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3142 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3143 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3144 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1660 av_async_pool = get_av ("Coro::async_pool", TRUE); 3145 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3146 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3147 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3148 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1661 3149
1662 coro_current = get_sv ("Coro::current", FALSE); 3150 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1663 SvREADONLY_on (coro_current); 3151 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3152 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3153 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1664 3154
1665 coro_stash = gv_stashpv ("Coro", TRUE); 3155 coro_stash = gv_stashpv ("Coro", TRUE);
1666 3156
1667 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3157 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1668 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3158 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1669 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3159 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1670 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3160 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1673 3163
1674 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3164 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1675 coro_ready[i] = newAV (); 3165 coro_ready[i] = newAV ();
1676 3166
1677 { 3167 {
1678 SV *sv = perl_get_sv("Coro::API", 1); 3168 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1679 3169
1680 coroapi.schedule = api_schedule; 3170 coroapi.schedule = api_schedule;
1681 coroapi.save = api_save; 3171 coroapi.schedule_to = api_schedule_to;
1682 coroapi.cede = api_cede; 3172 coroapi.cede = api_cede;
1683 coroapi.cede_notself = api_cede_notself; 3173 coroapi.cede_notself = api_cede_notself;
1684 coroapi.ready = api_ready; 3174 coroapi.ready = api_ready;
1685 coroapi.is_ready = api_is_ready; 3175 coroapi.is_ready = api_is_ready;
1686 coroapi.nready = &coro_nready; 3176 coroapi.nready = coro_nready;
1687 coroapi.current = coro_current; 3177 coroapi.current = coro_current;
1688 3178
1689 GCoroAPI = &coroapi; 3179 /*GCoroAPI = &coroapi;*/
1690 sv_setiv (sv, (IV)&coroapi); 3180 sv_setiv (sv, (IV)&coroapi);
1691 SvREADONLY_on (sv); 3181 SvREADONLY_on (sv);
1692 } 3182 }
1693} 3183}
3184
3185void
3186terminate (...)
3187 CODE:
3188 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3189
3190void
3191schedule (...)
3192 CODE:
3193 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3194
3195void
3196schedule_to (...)
3197 CODE:
3198 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3199
3200void
3201cede_to (...)
3202 CODE:
3203 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3204
3205void
3206cede (...)
3207 CODE:
3208 CORO_EXECUTE_SLF_XS (slf_init_cede);
3209
3210void
3211cede_notself (...)
3212 CODE:
3213 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3214
3215void
3216_cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self);
1694 3220
1695void 3221void
1696_set_current (SV *current) 3222_set_current (SV *current)
1697 PROTOTYPE: $ 3223 PROTOTYPE: $
1698 CODE: 3224 CODE:
1699 SvREFCNT_dec (SvRV (coro_current)); 3225 SvREFCNT_dec (SvRV (coro_current));
1700 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3226 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3227
3228void
3229_set_readyhook (SV *hook)
3230 PROTOTYPE: $
3231 CODE:
3232 SvREFCNT_dec (coro_readyhook);
3233 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1701 3234
1702int 3235int
1703prio (Coro::State coro, int newprio = 0) 3236prio (Coro::State coro, int newprio = 0)
3237 PROTOTYPE: $;$
1704 ALIAS: 3238 ALIAS:
1705 nice = 1 3239 nice = 1
1706 CODE: 3240 CODE:
1707{ 3241{
1708 RETVAL = coro->prio; 3242 RETVAL = coro->prio;
… …
1723 3257
1724SV * 3258SV *
1725ready (SV *self) 3259ready (SV *self)
1726 PROTOTYPE: $ 3260 PROTOTYPE: $
1727 CODE: 3261 CODE:
1728 RETVAL = boolSV (api_ready (self)); 3262 RETVAL = boolSV (api_ready (aTHX_ self));
1729 OUTPUT: 3263 OUTPUT:
1730 RETVAL 3264 RETVAL
1731 3265
1732int 3266int
1733nready (...) 3267nready (...)
… …
1735 CODE: 3269 CODE:
1736 RETVAL = coro_nready; 3270 RETVAL = coro_nready;
1737 OUTPUT: 3271 OUTPUT:
1738 RETVAL 3272 RETVAL
1739 3273
1740# for async_pool speedup
1741void 3274void
1742_pool_1 (SV *cb) 3275_pool_handler (...)
1743 CODE: 3276 CODE:
1744{ 3277 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1745 int i, len;
1746 HV *hv = (HV *)SvRV (coro_current);
1747 AV *defav = GvAV (PL_defgv);
1748 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1749 AV *invoke_av;
1750 3278
1751 if (!invoke) 3279void
1752 croak ("\3terminate\2\n"); 3280async_pool (SV *cv, ...)
3281 PROTOTYPE: &@
3282 PPCODE:
3283{
3284 HV *hv = (HV *)av_pop (av_async_pool);
3285 AV *av = newAV ();
3286 SV *cb = ST (0);
3287 int i;
1753 3288
1754 hv_store (hv, "desc", sizeof ("desc") - 1, 3289 av_extend (av, items - 2);
1755 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3290 for (i = 1; i < items; ++i)
3291 av_push (av, SvREFCNT_inc_NN (ST (i)));
1756 3292
1757 invoke_av = (AV *)SvRV (invoke); 3293 if ((SV *)hv == &PL_sv_undef)
1758 len = av_len (invoke_av);
1759
1760 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1761
1762 if (len > 0)
1763 { 3294 {
1764 av_fill (defav, len - 1); 3295 PUSHMARK (SP);
1765 for (i = 0; i < len; ++i) 3296 EXTEND (SP, 2);
1766 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3297 PUSHs (sv_Coro);
3298 PUSHs ((SV *)cv_pool_handler);
3299 PUTBACK;
3300 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3301 SPAGAIN;
3302
3303 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1767 } 3304 }
1768 3305
3306 {
3307 struct coro *coro = SvSTATE_hv (hv);
3308
3309 assert (!coro->invoke_cb);
3310 assert (!coro->invoke_av);
3311 coro->invoke_cb = SvREFCNT_inc (cb);
3312 coro->invoke_av = av;
3313 }
3314
3315 api_ready (aTHX_ (SV *)hv);
3316
3317 if (GIMME_V != G_VOID)
3318 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3319 else
1769 SvREFCNT_dec (invoke); 3320 SvREFCNT_dec (hv);
1770} 3321}
1771 3322
1772void 3323SV *
1773_pool_2 (SV *cb) 3324rouse_cb ()
3325 PROTOTYPE:
1774 CODE: 3326 CODE:
1775{ 3327 RETVAL = coro_new_rouse_cb (aTHX);
1776 struct coro *coro = SvSTATE (coro_current);
1777
1778 sv_setsv (cb, &PL_sv_undef);
1779
1780 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1781 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1782 croak ("\3terminate\2\n");
1783
1784 av_clear (GvAV (PL_defgv));
1785 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1786 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1787
1788 coro->save = CORO_SAVE_DEF;
1789 coro->prio = 0;
1790
1791 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1792 api_trace (coro_current, 0);
1793
1794 av_push (av_async_pool, newSVsv (coro_current));
1795}
1796
1797
1798MODULE = Coro::State PACKAGE = Coro::AIO
1799
1800SV *
1801_get_state ()
1802 CODE:
1803{
1804 struct io_state *data;
1805
1806 RETVAL = newSV (sizeof (struct io_state));
1807 data = (struct io_state *)SvPVX (RETVAL);
1808 SvCUR_set (RETVAL, sizeof (struct io_state));
1809 SvPOK_only (RETVAL);
1810
1811 data->errorno = errno;
1812 data->laststype = PL_laststype;
1813 data->laststatval = PL_laststatval;
1814 data->statcache = PL_statcache;
1815}
1816 OUTPUT: 3328 OUTPUT:
1817 RETVAL 3329 RETVAL
1818 3330
1819void 3331void
1820_set_state (char *data_) 3332rouse_wait (...)
1821 PROTOTYPE: $ 3333 PROTOTYPE: ;$
3334 PPCODE:
3335 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3336
3337
3338MODULE = Coro::State PACKAGE = PerlIO::cede
3339
3340BOOT:
3341 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3342
3343
3344MODULE = Coro::State PACKAGE = Coro::Semaphore
3345
3346SV *
3347new (SV *klass, SV *count = 0)
1822 CODE: 3348 CODE:
1823{ 3349 RETVAL = sv_bless (
1824 struct io_state *data = (void *)data_; 3350 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3351 GvSTASH (CvGV (cv))
3352 );
3353 OUTPUT:
3354 RETVAL
1825 3355
1826 errno = data->errorno; 3356# helper for Coro::Channel
1827 PL_laststype = data->laststype; 3357SV *
1828 PL_laststatval = data->laststatval; 3358_alloc (int count)
1829 PL_statcache = data->statcache; 3359 CODE:
1830} 3360 RETVAL = coro_waitarray_new (aTHX_ count);
3361 OUTPUT:
3362 RETVAL
1831 3363
3364SV *
3365count (SV *self)
3366 CODE:
3367 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3368 OUTPUT:
3369 RETVAL
3370
3371void
3372up (SV *self, int adjust = 1)
3373 ALIAS:
3374 adjust = 1
3375 CODE:
3376 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3377
3378void
3379down (...)
3380 CODE:
3381 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3382
3383void
3384wait (...)
3385 CODE:
3386 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3387
3388void
3389try (SV *self)
3390 PPCODE:
3391{
3392 AV *av = (AV *)SvRV (self);
3393 SV *count_sv = AvARRAY (av)[0];
3394 IV count = SvIVX (count_sv);
3395
3396 if (count > 0)
3397 {
3398 --count;
3399 SvIVX (count_sv) = count;
3400 XSRETURN_YES;
3401 }
3402 else
3403 XSRETURN_NO;
3404}
3405
3406void
3407waiters (SV *self)
3408 PPCODE:
3409{
3410 AV *av = (AV *)SvRV (self);
3411 int wcount = AvFILLp (av) + 1 - 1;
3412
3413 if (GIMME_V == G_SCALAR)
3414 XPUSHs (sv_2mortal (newSViv (wcount)));
3415 else
3416 {
3417 int i;
3418 EXTEND (SP, wcount);
3419 for (i = 1; i <= wcount; ++i)
3420 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3421 }
3422}
3423
3424MODULE = Coro::State PACKAGE = Coro::Signal
3425
3426SV *
3427new (SV *klass)
3428 CODE:
3429 RETVAL = sv_bless (
3430 coro_waitarray_new (aTHX_ 0),
3431 GvSTASH (CvGV (cv))
3432 );
3433 OUTPUT:
3434 RETVAL
3435
3436void
3437wait (...)
3438 CODE:
3439 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3440
3441void
3442broadcast (SV *self)
3443 CODE:
3444{
3445 AV *av = (AV *)SvRV (self);
3446 coro_signal_wake (aTHX_ av, AvFILLp (av));
3447}
3448
3449void
3450send (SV *self)
3451 CODE:
3452{
3453 AV *av = (AV *)SvRV (self);
3454
3455 if (AvFILLp (av))
3456 coro_signal_wake (aTHX_ av, 1);
3457 else
3458 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3459}
3460
3461IV
3462awaited (SV *self)
3463 CODE:
3464 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3465 OUTPUT:
3466 RETVAL
3467
3468
3469MODULE = Coro::State PACKAGE = Coro::AnyEvent
3470
3471BOOT:
3472 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3473
3474void
3475_schedule (...)
3476 CODE:
3477{
3478 static int incede;
3479
3480 api_cede_notself (aTHX);
3481
3482 ++incede;
3483 while (coro_nready >= incede && api_cede (aTHX))
3484 ;
3485
3486 sv_setsv (sv_activity, &PL_sv_undef);
3487 if (coro_nready >= incede)
3488 {
3489 PUSHMARK (SP);
3490 PUTBACK;
3491 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3492 }
3493
3494 --incede;
3495}
3496
3497
3498MODULE = Coro::State PACKAGE = Coro::AIO
3499
3500void
3501_register (char *target, char *proto, SV *req)
3502 CODE:
3503{
3504 CV *req_cv = coro_sv_2cv (aTHX_ req);
3505 /* newXSproto doesn't return the CV on 5.8 */
3506 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3507 sv_setpv ((SV *)slf_cv, proto);
3508 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3509}
3510

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