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Comparing Coro/Coro/State.xs (file contents):
Revision 1.170 by root, Thu Sep 27 20:14:49 2007 UTC vs.
Revision 1.333 by root, Thu Nov 27 12:39:00 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);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
203 279
204 /* coro process data */ 280 /* coro process data */
205 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;
206 289
207 /* linked list */ 290 /* linked list */
208 struct coro *next, *prev; 291 struct coro *next, *prev;
209 HV *hv; /* the perl hash associated with this coro, if any */
210}; 292};
211 293
212typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
213typedef 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 */
214 301
215/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
216 303
217#define PRIO_MAX 3 304#define PRIO_MAX 3
218#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
221#define PRIO_IDLE -3 308#define PRIO_IDLE -3
222#define PRIO_MIN -4 309#define PRIO_MIN -4
223 310
224/* for Coro.pm */ 311/* for Coro.pm */
225static SV *coro_current; 312static SV *coro_current;
313static SV *coro_readyhook;
226static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
227static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
228static struct coro *coro_first; 316static struct coro *coro_first;
317#define coro_nready coroapi.nready
229 318
230/** lowlevel stuff **********************************************************/ 319/** lowlevel stuff **********************************************************/
231 320
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
232static 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 *
233coro_clone_padlist (pTHX_ CV *cv) 413coro_derive_padlist (pTHX_ CV *cv)
234{ 414{
235 AV *padlist = CvPADLIST (cv); 415 AV *padlist = CvPADLIST (cv);
236 AV *newpadlist, *newpad; 416 AV *newpadlist, *newpad;
237 417
238 newpadlist = newAV (); 418 newpadlist = newAV ();
239 AvREAL_off (newpadlist); 419 AvREAL_off (newpadlist);
240#if PERL_VERSION_ATLEAST (5,9,0) 420#if PERL_VERSION_ATLEAST (5,10,0)
241 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
242#else 422#else
243 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
244#endif 424#endif
245 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
246 --AvFILLp (padlist); 426 --AvFILLp (padlist);
247 427
248 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
249 av_store (newpadlist, 1, (SV *)newpad); 429 av_store (newpadlist, 1, (SV *)newpad);
250 430
251 return newpadlist; 431 return newpadlist;
252} 432}
253 433
254static void 434static void
255free_padlist (pTHX_ AV *padlist) 435free_padlist (pTHX_ AV *padlist)
256{ 436{
257 /* may be during global destruction */ 437 /* may be during global destruction */
258 if (SvREFCNT (padlist)) 438 if (!IN_DESTRUCT)
259 { 439 {
260 I32 i = AvFILLp (padlist); 440 I32 i = AvFILLp (padlist);
261 while (i >= 0) 441
442 while (i > 0) /* special-case index 0 */
262 { 443 {
263 SV **svp = av_fetch (padlist, i--, FALSE); 444 /* we try to be extra-careful here */
264 if (svp) 445 AV *av = (AV *)AvARRAY (padlist)[i--];
265 { 446 I32 j = AvFILLp (av);
266 SV *sv; 447
267 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
268 SvREFCNT_dec (sv); 452 SvREFCNT_dec (av);
269
270 SvREFCNT_dec (*svp);
271 }
272 } 453 }
273 454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
274 SvREFCNT_dec ((SV*)padlist); 458 SvREFCNT_dec ((SV*)padlist);
275 } 459 }
276} 460}
277 461
278static int 462static int
… …
283 467
284 /* casting is fun. */ 468 /* casting is fun. */
285 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
286 free_padlist (aTHX_ padlist); 470 free_padlist (aTHX_ padlist);
287 471
288 SvREFCNT_dec (av); 472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
289 473
290 return 0; 474 return 0;
291} 475}
292 476
293#define PERL_MAGIC_coro PERL_MAGIC_ext 477static MGVTBL coro_cv_vtbl = {
294 478 0, 0, 0, 0,
295static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 479 coro_cv_free
296 480};
297#define CORO_MAGIC(cv) \
298 SvMAGIC (cv) \
299 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
300 ? SvMAGIC (cv) \
301 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
302 : 0
303
304static struct coro *
305SvSTATE_ (pTHX_ SV *coro)
306{
307 HV *stash;
308 MAGIC *mg;
309
310 if (SvROK (coro))
311 coro = SvRV (coro);
312
313 stash = SvSTASH (coro);
314 if (stash != coro_stash && stash != coro_state_stash)
315 {
316 /* very slow, but rare, check */
317 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
318 croak ("Coro::State object required");
319 }
320
321 mg = CORO_MAGIC (coro);
322 return (struct coro *)mg->mg_ptr;
323}
324
325#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
326 481
327/* the next two functions merely cache the padlists */ 482/* the next two functions merely cache the padlists */
328static void 483static void
329get_padlist (pTHX_ CV *cv) 484get_padlist (pTHX_ CV *cv)
330{ 485{
331 MAGIC *mg = CORO_MAGIC (cv); 486 MAGIC *mg = CORO_MAGIC_cv (cv);
332 AV *av; 487 AV *av;
333 488
334 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
335 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
336 else 491 else
337 { 492 {
338#if CORO_PREFER_PERL_FUNCTIONS 493#if CORO_PREFER_PERL_FUNCTIONS
339 /* this is probably cleaner, but also slower? */ 494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
340 CV *cp = Perl_cv_clone (cv); 496 CV *cp = Perl_cv_clone (aTHX_ cv);
341 CvPADLIST (cv) = CvPADLIST (cp); 497 CvPADLIST (cv) = CvPADLIST (cp);
342 CvPADLIST (cp) = 0; 498 CvPADLIST (cp) = 0;
343 SvREFCNT_dec (cp); 499 SvREFCNT_dec (cp);
344#else 500#else
345 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
346#endif 502#endif
347 } 503 }
348} 504}
349 505
350static void 506static void
351put_padlist (pTHX_ CV *cv) 507put_padlist (pTHX_ CV *cv)
352{ 508{
353 MAGIC *mg = CORO_MAGIC (cv); 509 MAGIC *mg = CORO_MAGIC_cv (cv);
354 AV *av; 510 AV *av;
355 511
356 if (!mg) 512 if (expect_false (!mg))
357 { 513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
358 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
359 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
360 mg->mg_virtual = &vtbl_coro;
361 mg->mg_obj = (SV *)newAV ();
362 }
363 514
364 av = (AV *)mg->mg_obj; 515 av = (AV *)mg->mg_obj;
365 516
366 if (AvFILLp (av) >= AvMAX (av)) 517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
367 av_extend (av, AvMAX (av) + 1); 518 av_extend (av, AvFILLp (av) + 1);
368 519
369 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
370} 521}
371 522
372/** load & save, init *******************************************************/ 523/** load & save, init *******************************************************/
373 524
374#define SB do {
375#define SE } while (0)
376
377#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
378
379static void 525static void
380load_perl (pTHX_ Coro__State c) 526load_perl (pTHX_ Coro__State c)
381{ 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
382#define VAR(name,type) PL_ ## name = c->name; 539 #define VAR(name,type) PL_ ## name = slot->name;
383# include "state.h" 540 # include "state.h"
384#undef VAR 541 #undef VAR
385
386 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
387 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
388 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
389 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
390
391 if (c->irssv)
392 {
393 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
394 {
395 SvREFCNT_dec (c->irssv);
396 c->irssv = 0;
397 }
398 else
399 {
400 REPLACE_SV (PL_rs, c->irssv);
401 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
402 sv_setsv (c->irssv_sv, PL_rs);
403 }
404 }
405 542
406 { 543 {
407 dSP; 544 dSP;
545
408 CV *cv; 546 CV *cv;
409 547
410 /* now do the ugly restore mess */ 548 /* now do the ugly restore mess */
411 while ((cv = (CV *)POPs)) 549 while (expect_true (cv = (CV *)POPs))
412 { 550 {
413 put_padlist (aTHX_ cv); /* mark this padlist as available */ 551 put_padlist (aTHX_ cv); /* mark this padlist as available */
414 CvDEPTH (cv) = PTR2IV (POPs); 552 CvDEPTH (cv) = PTR2IV (POPs);
415 CvPADLIST (cv) = (AV *)POPs; 553 CvPADLIST (cv) = (AV *)POPs;
416 } 554 }
417 555
418 PUTBACK; 556 PUTBACK;
419 } 557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
420} 561}
421 562
422static void 563static void
423save_perl (pTHX_ Coro__State c) 564save_perl (pTHX_ Coro__State c)
424{ 565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
425 { 569 {
426 dSP; 570 dSP;
427 I32 cxix = cxstack_ix; 571 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack; 572 PERL_CONTEXT *ccstk = cxstack;
429 PERL_SI *top_si = PL_curstackinfo; 573 PERL_SI *top_si = PL_curstackinfo;
… …
435 579
436 XPUSHs (Nullsv); 580 XPUSHs (Nullsv);
437 /* this loop was inspired by pp_caller */ 581 /* this loop was inspired by pp_caller */
438 for (;;) 582 for (;;)
439 { 583 {
440 while (cxix >= 0) 584 while (expect_true (cxix >= 0))
441 { 585 {
442 PERL_CONTEXT *cx = &ccstk[cxix--]; 586 PERL_CONTEXT *cx = &ccstk[cxix--];
443 587
444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT) 588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
445 { 589 {
446 CV *cv = cx->blk_sub.cv; 590 CV *cv = cx->blk_sub.cv;
447 591
448 if (CvDEPTH (cv)) 592 if (expect_true (CvDEPTH (cv)))
449 { 593 {
450 EXTEND (SP, 3); 594 EXTEND (SP, 3);
451 PUSHs ((SV *)CvPADLIST (cv)); 595 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
453 PUSHs ((SV *)cv); 597 PUSHs ((SV *)cv);
454 598
455 CvDEPTH (cv) = 0; 599 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv); 600 get_padlist (aTHX_ cv);
457 } 601 }
458 } 602 }
459 } 603 }
460 604
461 if (top_si->si_type == PERLSI_MAIN) 605 if (expect_true (top_si->si_type == PERLSI_MAIN))
462 break; 606 break;
463 607
464 top_si = top_si->si_prev; 608 top_si = top_si->si_prev;
465 ccstk = top_si->si_cxstack; 609 ccstk = top_si->si_cxstack;
466 cxix = top_si->si_cxix; 610 cxix = top_si->si_cxix;
467 } 611 }
468 612
469 PUTBACK; 613 PUTBACK;
470 } 614 }
471 615
472 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 */
473 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 617 /* we manually unroll here, as usually 2 slots is enough */
474 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 618 if (SLOT_COUNT >= 1) CXINC;
475 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0; 619 if (SLOT_COUNT >= 2) CXINC;
476 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 */
477 627
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
478#define VAR(name,type)c->name = PL_ ## name; 639 #define VAR(name,type) slot->name = PL_ ## name;
479# include "state.h" 640 # include "state.h"
480#undef VAR 641 #undef VAR
642 }
481} 643}
482 644
483/* 645/*
484 * allocate various perl stacks. This is an exact copy 646 * allocate various perl stacks. This is almost an exact copy
485 * of perl.c:init_stacks, except that it uses less memory 647 * of perl.c:init_stacks, except that it uses less memory
486 * on the (sometimes correct) assumption that coroutines do 648 * on the (sometimes correct) assumption that coroutines do
487 * not usually need a lot of stackspace. 649 * not usually need a lot of stackspace.
488 */ 650 */
489#if CORO_PREFER_PERL_FUNCTIONS 651#if CORO_PREFER_PERL_FUNCTIONS
490# define coro_init_stacks init_stacks 652# define coro_init_stacks(thx) init_stacks ()
491#else 653#else
492static void 654static void
493coro_init_stacks (pTHX) 655coro_init_stacks (pTHX)
494{ 656{
495 PL_curstackinfo = new_stackinfo(64, 6); 657 PL_curstackinfo = new_stackinfo(32, 8);
496 PL_curstackinfo->si_type = PERLSI_MAIN; 658 PL_curstackinfo->si_type = PERLSI_MAIN;
497 PL_curstack = PL_curstackinfo->si_stack; 659 PL_curstack = PL_curstackinfo->si_stack;
498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499 661
500 PL_stack_base = AvARRAY(PL_curstack); 662 PL_stack_base = AvARRAY(PL_curstack);
501 PL_stack_sp = PL_stack_base; 663 PL_stack_sp = PL_stack_base;
502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503 665
504 New(50,PL_tmps_stack,64,SV*); 666 New(50,PL_tmps_stack,32,SV*);
505 PL_tmps_floor = -1; 667 PL_tmps_floor = -1;
506 PL_tmps_ix = -1; 668 PL_tmps_ix = -1;
507 PL_tmps_max = 64; 669 PL_tmps_max = 32;
508 670
509 New(54,PL_markstack,16,I32); 671 New(54,PL_markstack,16,I32);
510 PL_markstack_ptr = PL_markstack; 672 PL_markstack_ptr = PL_markstack;
511 PL_markstack_max = PL_markstack + 16; 673 PL_markstack_max = PL_markstack + 16;
512 674
513#ifdef SET_MARK_OFFSET 675#ifdef SET_MARK_OFFSET
514 SET_MARK_OFFSET; 676 SET_MARK_OFFSET;
515#endif 677#endif
516 678
517 New(54,PL_scopestack,16,I32); 679 New(54,PL_scopestack,8,I32);
518 PL_scopestack_ix = 0; 680 PL_scopestack_ix = 0;
519 PL_scopestack_max = 16; 681 PL_scopestack_max = 8;
520 682
521 New(54,PL_savestack,64,ANY); 683 New(54,PL_savestack,24,ANY);
522 PL_savestack_ix = 0; 684 PL_savestack_ix = 0;
523 PL_savestack_max = 64; 685 PL_savestack_max = 24;
524 686
525#if !PERL_VERSION_ATLEAST (5,9,0) 687#if !PERL_VERSION_ATLEAST (5,10,0)
526 New(54,PL_retstack,4,OP*); 688 New(54,PL_retstack,4,OP*);
527 PL_retstack_ix = 0; 689 PL_retstack_ix = 0;
528 PL_retstack_max = 4; 690 PL_retstack_max = 4;
529#endif 691#endif
530} 692}
… …
532 694
533/* 695/*
534 * destroy the stacks, the callchain etc... 696 * destroy the stacks, the callchain etc...
535 */ 697 */
536static void 698static void
537coro_destroy_stacks (pTHX) 699coro_destruct_stacks (pTHX)
538{ 700{
539 if (!IN_DESTRUCT)
540 {
541 /* restore all saved variables and stuff */
542 LEAVE_SCOPE (0);
543 assert (PL_tmps_floor == -1);
544
545 /* free all temporaries */
546 FREETMPS;
547 assert (PL_tmps_ix == -1);
548
549 /* unwind all extra stacks */
550 POPSTACK_TO (PL_mainstack);
551
552 /* unwind main stack */
553 dounwind (-1);
554 }
555
556 while (PL_curstackinfo->si_next) 701 while (PL_curstackinfo->si_next)
557 PL_curstackinfo = PL_curstackinfo->si_next; 702 PL_curstackinfo = PL_curstackinfo->si_next;
558 703
559 while (PL_curstackinfo) 704 while (PL_curstackinfo)
560 { 705 {
… …
570 715
571 Safefree (PL_tmps_stack); 716 Safefree (PL_tmps_stack);
572 Safefree (PL_markstack); 717 Safefree (PL_markstack);
573 Safefree (PL_scopestack); 718 Safefree (PL_scopestack);
574 Safefree (PL_savestack); 719 Safefree (PL_savestack);
575#if !PERL_VERSION_ATLEAST (5,9,0) 720#if !PERL_VERSION_ATLEAST (5,10,0)
576 Safefree (PL_retstack); 721 Safefree (PL_retstack);
577#endif 722#endif
578} 723}
579 724
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);
733
580static size_t 734static size_t
581coro_rss (struct coro *coro) 735coro_rss (pTHX_ struct coro *coro)
582{ 736{
583 size_t rss = sizeof (coro); 737 size_t rss = sizeof (*coro);
584 738
585 if (coro->mainstack) 739 if (coro->mainstack)
586 { 740 {
587 if (coro->flags & CF_RUNNING) 741 if (coro->flags & CF_RUNNING)
588 { 742 {
589 #define VAR(name,type)coro->name = PL_ ## name; 743 #define SYM(sym) PL_ ## sym
590 # include "state.h" 744 CORO_RSS;
591 #undef VAR 745 #undef SYM
592 } 746 }
593 747 else
594 rss += sizeof (coro->curstackinfo); 748 {
595 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *); 749 #define SYM(sym) coro->slot->sym
596 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 750 CORO_RSS;
597 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *); 751 #undef SYM
598 rss += coro->tmps_max * sizeof (SV *); 752 }
599 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
600 rss += coro->scopestack_max * sizeof (I32);
601 rss += coro->savestack_max * sizeof (ANY);
602
603#if !PERL_VERSION_ATLEAST (5,9,0)
604 rss += coro->retstack_max * sizeof (OP *);
605#endif
606 } 753 }
607 754
608 return rss; 755 return rss;
609} 756}
610 757
611/** coroutine stack handling ************************************************/ 758/** coroutine stack handling ************************************************/
612 759
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 */
613static 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 */
614setup_coro (pTHX_ struct coro *coro) 872coro_setup (pTHX_ struct coro *coro)
615{ 873{
616 /* 874 /*
617 * emulate part of the perl startup here. 875 * emulate part of the perl startup here.
618 */ 876 */
619 coro_init_stacks (aTHX); 877 coro_init_stacks (aTHX);
620 878
621 PL_runops = RUNOPS_DEFAULT; 879 PL_runops = RUNOPS_DEFAULT;
622 PL_curcop = &PL_compiling; 880 PL_curcop = &PL_compiling;
623 PL_in_eval = EVAL_NULL; 881 PL_in_eval = EVAL_NULL;
624 PL_comppad = 0; 882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
625 PL_curpm = 0; 886 PL_curpm = 0;
887 PL_curpad = 0;
626 PL_localizing = 0; 888 PL_localizing = 0;
627 PL_dirty = 0; 889 PL_dirty = 0;
628 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);
629 907
630 { 908 {
631 dSP; 909 dSP;
632 LOGOP myop; 910 UNOP myop;
633 911
634 SvREFCNT_dec (GvAV (PL_defgv));
635 GvAV (PL_defgv) = coro->args; coro->args = 0;
636
637 Zero (&myop, 1, LOGOP); 912 Zero (&myop, 1, UNOP);
638 myop.op_next = Nullop; 913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
639 myop.op_flags = OPf_WANT_VOID; 915 myop.op_flags = OPf_WANT_VOID;
640 916
641 PUSHMARK (SP); 917 PUSHMARK (SP);
642 XPUSHs (av_shift (GvAV (PL_defgv))); 918 PUSHs ((SV *)coro->startcv);
643 PUTBACK; 919 PUTBACK;
644 PL_op = (OP *)&myop; 920 PL_op = (OP *)&myop;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646 SPAGAIN;
647 } 922 }
648 923
649 ENTER; /* necessary e.g. for dounwind */ 924 /* this newly created coroutine might be run on an existing cctx which most
650} 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 */
651 929
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
652static void 942static void
943coro_destruct (pTHX_ struct coro *coro)
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 SvREFCNT_dec (GvSV (PL_defgv));
963 SvREFCNT_dec (GvAV (PL_defgv));
964 SvREFCNT_dec (GvSV (PL_errgv));
965 SvREFCNT_dec (PL_defoutgv);
966 SvREFCNT_dec (PL_rs);
967 SvREFCNT_dec (GvSV (irsgv));
968 SvREFCNT_dec (GvHV (PL_hintgv));
969
970 SvREFCNT_dec (PL_diehook);
971 SvREFCNT_dec (PL_warnhook);
972
973 SvREFCNT_dec (coro->saved_deffh);
974 SvREFCNT_dec (coro->rouse_cb);
975 SvREFCNT_dec (coro->invoke_cb);
976 SvREFCNT_dec (coro->invoke_av);
977
978 coro_destruct_stacks (aTHX);
979}
980
981INLINE void
653free_coro_mortal (pTHX) 982free_coro_mortal (pTHX)
654{ 983{
655 if (coro_mortal) 984 if (expect_true (coro_mortal))
656 { 985 {
657 SvREFCNT_dec (coro_mortal); 986 SvREFCNT_dec (coro_mortal);
658 coro_mortal = 0; 987 coro_mortal = 0;
659 } 988 }
660} 989}
… …
662static int 991static int
663runops_trace (pTHX) 992runops_trace (pTHX)
664{ 993{
665 COP *oldcop = 0; 994 COP *oldcop = 0;
666 int oldcxix = -2; 995 int oldcxix = -2;
667 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
668 coro_cctx *cctx = coro->cctx;
669 996
670 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
671 { 998 {
672 PERL_ASYNC_CHECK (); 999 PERL_ASYNC_CHECK ();
673 1000
674 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1001 if (cctx_current->flags & CC_TRACE_ALL)
675 { 1002 {
676 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
677 SV **bot, **top;
678 AV *av = newAV (); /* return values */
679 SV **cb;
680 runops_proc_t old_runops = PL_runops;
681 dSP;
682 ENTER;
683 SAVETMPS;
684 EXTEND (SP, 3);
685 PL_runops = RUNOPS_DEFAULT;
686
687 GV *gv = CvGV (cx->blk_sub.cv);
688 SV *fullname = sv_2mortal (newSV (0));
689 if (isGV (gv))
690 gv_efullname3 (fullname, gv, 0);
691
692 bot = PL_stack_base + cx->blk_oldsp + 1;
693 top = cx->blk_gimme == G_ARRAY ? SP + 1
694 : cx->blk_gimme == G_SCALAR ? bot + 1
695 : bot;
696
697 while (bot < top)
698 av_push (av, SvREFCNT_inc (*bot++));
699
700 PUSHMARK (SP);
701 PUSHs (&PL_sv_no);
702 PUSHs (fullname);
703 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
704 PUTBACK;
705 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
706 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
707 SPAGAIN;
708
709 FREETMPS;
710 LEAVE;
711 PL_runops = old_runops;
712 }
713
714 if (oldcop != PL_curcop)
715 {
716 oldcop = PL_curcop;
717
718 if (PL_curcop != &PL_compiling)
719 { 1004 {
1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1006 SV **bot, **top;
1007 AV *av = newAV (); /* return values */
720 SV **cb; 1008 SV **cb;
721 runops_proc_t old_runops = PL_runops;
722 dSP; 1009 dSP;
1010
1011 GV *gv = CvGV (cx->blk_sub.cv);
1012 SV *fullname = sv_2mortal (newSV (0));
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 bot = PL_stack_base + cx->blk_oldsp + 1;
1017 top = cx->blk_gimme == G_ARRAY ? SP + 1
1018 : cx->blk_gimme == G_SCALAR ? bot + 1
1019 : bot;
1020
1021 av_extend (av, top - bot);
1022 while (bot < top)
1023 av_push (av, SvREFCNT_inc_NN (*bot++));
1024
1025 PL_runops = RUNOPS_DEFAULT;
723 ENTER; 1026 ENTER;
724 SAVETMPS; 1027 SAVETMPS;
725 EXTEND (SP, 3); 1028 EXTEND (SP, 3);
726 PL_runops = RUNOPS_DEFAULT; 1029 PUSHMARK (SP);
1030 PUSHs (&PL_sv_no);
1031 PUSHs (fullname);
1032 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1033 PUTBACK;
1034 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1035 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1036 SPAGAIN;
1037 FREETMPS;
1038 LEAVE;
1039 PL_runops = runops_trace;
1040 }
727 1041
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1042 if (oldcop != PL_curcop)
1043 {
1044 oldcop = PL_curcop;
1045
1046 if (PL_curcop != &PL_compiling)
729 { 1047 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1048 SV **cb;
731 1049
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
733 { 1051 {
1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1053
1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1055 {
1056 dSP;
734 GV *gv = CvGV (cx->blk_sub.cv); 1057 GV *gv = CvGV (cx->blk_sub.cv);
735 SV *fullname = sv_2mortal (newSV (0)); 1058 SV *fullname = sv_2mortal (newSV (0));
1059
736 if (isGV (gv)) 1060 if (isGV (gv))
737 gv_efullname3 (fullname, gv, 0); 1061 gv_efullname3 (fullname, gv, 0);
738 1062
1063 PL_runops = RUNOPS_DEFAULT;
1064 ENTER;
1065 SAVETMPS;
1066 EXTEND (SP, 3);
1067 PUSHMARK (SP);
1068 PUSHs (&PL_sv_yes);
1069 PUSHs (fullname);
1070 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1071 PUTBACK;
1072 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1073 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1074 SPAGAIN;
1075 FREETMPS;
1076 LEAVE;
1077 PL_runops = runops_trace;
1078 }
1079
1080 oldcxix = cxstack_ix;
1081 }
1082
1083 if (cctx_current->flags & CC_TRACE_LINE)
1084 {
1085 dSP;
1086
1087 PL_runops = RUNOPS_DEFAULT;
1088 ENTER;
1089 SAVETMPS;
1090 EXTEND (SP, 3);
1091 PL_runops = RUNOPS_DEFAULT;
739 PUSHMARK (SP); 1092 PUSHMARK (SP);
740 PUSHs (&PL_sv_yes); 1093 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
741 PUSHs (fullname); 1094 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
742 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
743 PUTBACK; 1095 PUTBACK;
744 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1096 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
745 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1097 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
746 SPAGAIN; 1098 SPAGAIN;
1099 FREETMPS;
1100 LEAVE;
1101 PL_runops = runops_trace;
747 } 1102 }
748
749 oldcxix = cxstack_ix;
750 } 1103 }
751
752 if (cctx->flags & CC_TRACE_LINE)
753 {
754 PUSHMARK (SP);
755 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
756 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
757 PUTBACK;
758 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
759 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
760 SPAGAIN;
761 }
762
763 FREETMPS;
764 LEAVE;
765 PL_runops = old_runops;
766 } 1104 }
767 } 1105 }
768 } 1106 }
769 1107
770 TAINT_NOT; 1108 TAINT_NOT;
771 return 0; 1109 return 0;
772} 1110}
773 1111
774/* inject a fake call to Coro::State::_cctx_init into the execution */ 1112static struct CoroSLF cctx_ssl_frame;
775/* _cctx_init should be careful, as it could be called at almost any time */ 1113
776/* during execution of a perl program */ 1114static void
1115slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1116{
1117 ta->prev = 0;
1118}
1119
1120static int
1121slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1122{
1123 *frame = cctx_ssl_frame;
1124
1125 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1126}
1127
1128/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
777static void NOINLINE 1129static void NOINLINE
778prepare_cctx (pTHX_ coro_cctx *cctx) 1130cctx_prepare (pTHX)
779{ 1131{
780 dSP;
781 LOGOP myop;
782
783 PL_top_env = &PL_start_env; 1132 PL_top_env = &PL_start_env;
784 1133
785 if (cctx->flags & CC_TRACE) 1134 if (cctx_current->flags & CC_TRACE)
786 PL_runops = runops_trace; 1135 PL_runops = runops_trace;
787 1136
788 Zero (&myop, 1, LOGOP); 1137 /* we already must be executing an SLF op, there is no other valid way
789 myop.op_next = PL_op; 1138 * that can lead to creation of a new cctx */
790 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
791 1141
792 PUSHMARK (SP); 1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
793 EXTEND (SP, 2); 1143 cctx_ssl_frame = slf_frame;
794 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1144
795 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1145 slf_frame.prepare = slf_prepare_set_stacklevel;
796 PUTBACK; 1146 slf_frame.check = slf_check_set_stacklevel;
797 PL_op = (OP *)&myop; 1147}
798 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1148
799 SPAGAIN; 1149/* the tail of transfer: execute stuff we can only do after a transfer */
1150INLINE void
1151transfer_tail (pTHX)
1152{
1153 free_coro_mortal (aTHX);
800} 1154}
801 1155
802/* 1156/*
803 * this is a _very_ stripped down perl interpreter ;) 1157 * this is a _very_ stripped down perl interpreter ;)
804 */ 1158 */
805static void 1159static void
806coro_run (void *arg) 1160cctx_run (void *arg)
807{ 1161{
1162#ifdef USE_ITHREADS
1163# if CORO_PTHREAD
1164 PERL_SET_CONTEXT (coro_thx);
1165# endif
1166#endif
1167 {
808 dTHX; 1168 dTHX;
809 1169
810 /* coro_run is the alternative tail of transfer(), so unlock here. */ 1170 /* normally we would need to skip the entersub here */
811 UNLOCK; 1171 /* not doing so will re-execute it, which is exactly what we want */
812
813 /* we now skip the entersub that lead to transfer() */
814 PL_op = PL_op->op_next; 1172 /* PL_nop = PL_nop->op_next */
815 1173
816 /* inject a fake subroutine call to cctx_init */ 1174 /* inject a fake subroutine call to cctx_init */
817 prepare_cctx (aTHX_ (coro_cctx *)arg); 1175 cctx_prepare (aTHX);
818 1176
1177 /* cctx_run is the alternative tail of transfer() */
1178 transfer_tail (aTHX);
1179
819 /* somebody or something will hit me for both perl_run and PL_restartop */ 1180 /* somebody or something will hit me for both perl_run and PL_restartop */
820 PL_restartop = PL_op; 1181 PL_restartop = PL_op;
821 perl_run (PL_curinterp); 1182 perl_run (PL_curinterp);
822
823 /* 1183 /*
1184 * Unfortunately, there is no way to get at the return values of the
1185 * coro body here, as perl_run destroys these
1186 */
1187
1188 /*
824 * If perl-run returns we assume exit() was being called or the coro 1189 * If perl-run returns we assume exit() was being called or the coro
825 * fell off the end, which seems to be the only valid (non-bug) 1190 * fell off the end, which seems to be the only valid (non-bug)
826 * reason for perl_run to return. We try to exit by jumping to the 1191 * reason for perl_run to return. We try to exit by jumping to the
827 * bootstrap-time "top" top_env, as we cannot restore the "main" 1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
828 * coroutine as Coro has no such concept 1193 * coroutine as Coro has no such concept.
1194 * This actually isn't valid with the pthread backend, but OSes requiring
1195 * that backend are too broken to do it in a standards-compliant way.
829 */ 1196 */
830 PL_top_env = main_top_env; 1197 PL_top_env = main_top_env;
831 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1199 }
832} 1200}
833 1201
834static coro_cctx * 1202static coro_cctx *
835cctx_new () 1203cctx_new ()
836{ 1204{
837 coro_cctx *cctx; 1205 coro_cctx *cctx;
1206
1207 ++cctx_count;
1208 New (0, cctx, 1, coro_cctx);
1209
1210 cctx->gen = cctx_gen;
1211 cctx->flags = 0;
1212 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1213
1214 return cctx;
1215}
1216
1217/* create a new cctx only suitable as source */
1218static coro_cctx *
1219cctx_new_empty ()
1220{
1221 coro_cctx *cctx = cctx_new ();
1222
1223 cctx->sptr = 0;
1224 coro_create (&cctx->cctx, 0, 0, 0, 0);
1225
1226 return cctx;
1227}
1228
1229/* create a new cctx suitable as destination/running a perl interpreter */
1230static coro_cctx *
1231cctx_new_run ()
1232{
1233 coro_cctx *cctx = cctx_new ();
838 void *stack_start; 1234 void *stack_start;
839 size_t stack_size; 1235 size_t stack_size;
840 1236
841 ++cctx_count;
842
843 Newz (0, cctx, 1, coro_cctx);
844
845#if HAVE_MMAP 1237#if HAVE_MMAP
846
847 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1238 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
848 /* mmap supposedly does allocate-on-write for us */ 1239 /* mmap supposedly does allocate-on-write for us */
849 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1240 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
850 1241
851 if (cctx->sptr != (void *)-1) 1242 if (cctx->sptr != (void *)-1)
852 { 1243 {
853# if CORO_STACKGUARD 1244 #if CORO_STACKGUARD
854 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
855# endif 1246 #endif
856 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
857 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
858 cctx->flags |= CC_MAPPED; 1249 cctx->flags |= CC_MAPPED;
859 } 1250 }
860 else 1251 else
861#endif 1252#endif
862 { 1253 {
863 cctx->ssize = coro_stacksize * (long)sizeof (long); 1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
864 New (0, cctx->sptr, coro_stacksize, long); 1255 New (0, cctx->sptr, cctx_stacksize, long);
865 1256
866 if (!cctx->sptr) 1257 if (!cctx->sptr)
867 { 1258 {
868 perror ("FATAL: unable to allocate stack for coroutine"); 1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
869 _exit (EXIT_FAILURE); 1260 _exit (EXIT_FAILURE);
870 } 1261 }
871 1262
872 stack_start = cctx->sptr; 1263 stack_start = cctx->sptr;
873 stack_size = cctx->ssize; 1264 stack_size = cctx->ssize;
874 } 1265 }
875 1266
876 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1269 #endif
1270
877 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size); 1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
878 1272
879 return cctx; 1273 return cctx;
880} 1274}
881 1275
882static void 1276static void
883cctx_destroy (coro_cctx *cctx) 1277cctx_destroy (coro_cctx *cctx)
884{ 1278{
885 if (!cctx) 1279 if (!cctx)
886 return; 1280 return;
887 1281
1282 assert (cctx != cctx_current);//D temporary
1283
888 --cctx_count; 1284 --cctx_count;
1285 coro_destroy (&cctx->cctx);
889 1286
1287 /* coro_transfer creates new, empty cctx's */
1288 if (cctx->sptr)
1289 {
890#if CORO_USE_VALGRIND 1290 #if CORO_USE_VALGRIND
891 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
892#endif 1292 #endif
893 1293
894#if HAVE_MMAP 1294#if HAVE_MMAP
895 if (cctx->flags & CC_MAPPED) 1295 if (cctx->flags & CC_MAPPED)
896 munmap (cctx->sptr, cctx->ssize); 1296 munmap (cctx->sptr, cctx->ssize);
897 else 1297 else
898#endif 1298#endif
899 Safefree (cctx->sptr); 1299 Safefree (cctx->sptr);
1300 }
900 1301
901 Safefree (cctx); 1302 Safefree (cctx);
902} 1303}
1304
1305/* wether this cctx should be destructed */
1306#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
903 1307
904static coro_cctx * 1308static coro_cctx *
905cctx_get (pTHX) 1309cctx_get (pTHX)
906{ 1310{
907 while (cctx_first) 1311 while (expect_true (cctx_first))
908 { 1312 {
909 coro_cctx *cctx = cctx_first; 1313 coro_cctx *cctx = cctx_first;
910 cctx_first = cctx->next; 1314 cctx_first = cctx->next;
911 --cctx_idle; 1315 --cctx_idle;
912 1316
913 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE)) 1317 if (expect_true (!CCTX_EXPIRED (cctx)))
914 return cctx; 1318 return cctx;
915 1319
916 cctx_destroy (cctx); 1320 cctx_destroy (cctx);
917 } 1321 }
918 1322
919 return cctx_new (); 1323 return cctx_new_run ();
920} 1324}
921 1325
922static void 1326static void
923cctx_put (coro_cctx *cctx) 1327cctx_put (coro_cctx *cctx)
924{ 1328{
1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1330
925 /* free another cctx if overlimit */ 1331 /* free another cctx if overlimit */
926 if (cctx_idle >= MAX_IDLE_CCTX) 1332 if (expect_false (cctx_idle >= cctx_max_idle))
927 { 1333 {
928 coro_cctx *first = cctx_first; 1334 coro_cctx *first = cctx_first;
929 cctx_first = first->next; 1335 cctx_first = first->next;
930 --cctx_idle; 1336 --cctx_idle;
931 1337
… …
937 cctx_first = cctx; 1343 cctx_first = cctx;
938} 1344}
939 1345
940/** coroutine switching *****************************************************/ 1346/** coroutine switching *****************************************************/
941 1347
942static void NOINLINE 1348static void
943transfer_check (pTHX_ struct coro *prev, struct coro *next) 1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
944{ 1350{
945 if (prev != next) 1351 /* TODO: throwing up here is considered harmful */
1352
1353 if (expect_true (prev != next))
946 { 1354 {
947 if (!(prev->flags & (CF_RUNNING | CF_NEW))) 1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
948 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
949 1357
950 if (next->flags & CF_RUNNING) 1358 if (expect_false (next->flags & CF_RUNNING))
951 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
952 1360
953 if (next->flags & CF_DESTROYED) 1361 if (expect_false (next->flags & CF_DESTROYED))
954 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
955 1363
1364#if !PERL_VERSION_ATLEAST (5,10,0)
956 if (PL_lex_state != LEX_NOTPARSING) 1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
957 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1367#endif
958 } 1368 }
959} 1369}
960 1370
961/* always use the TRANSFER macro */ 1371/* always use the TRANSFER macro */
962static void NOINLINE 1372static void NOINLINE /* noinline so we have a fixed stackframe */
963transfer (pTHX_ struct coro *prev, struct coro *next) 1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
964{ 1374{
965 dSTACKLEVEL; 1375 dSTACKLEVEL;
966 1376
967 /* sometimes transfer is only called to set idle_sp */ 1377 /* sometimes transfer is only called to set idle_sp */
968 if (!next) 1378 if (expect_false (!prev))
969 { 1379 {
970 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1380 cctx_current->idle_sp = STACKLEVEL;
971 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1381 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
972 }
973 else if (prev != next)
974 { 1382 }
1383 else if (expect_true (prev != next))
1384 {
975 coro_cctx *prev__cctx; 1385 coro_cctx *cctx_prev;
976 1386
977 if (prev->flags & CF_NEW) 1387 if (expect_false (prev->flags & CF_NEW))
978 { 1388 {
979 /* create a new empty context */ 1389 /* create a new empty/source context */
980 Newz (0, prev->cctx, 1, coro_cctx);
981 prev->flags &= ~CF_NEW; 1390 prev->flags &= ~CF_NEW;
982 prev->flags |= CF_RUNNING; 1391 prev->flags |= CF_RUNNING;
983 } 1392 }
984 1393
985 prev->flags &= ~CF_RUNNING; 1394 prev->flags &= ~CF_RUNNING;
986 next->flags |= CF_RUNNING; 1395 next->flags |= CF_RUNNING;
987 1396
988 LOCK; 1397 /* first get rid of the old state */
1398 save_perl (aTHX_ prev);
989 1399
990 if (next->flags & CF_NEW) 1400 if (expect_false (next->flags & CF_NEW))
991 { 1401 {
992 /* need to start coroutine */ 1402 /* need to start coroutine */
993 next->flags &= ~CF_NEW; 1403 next->flags &= ~CF_NEW;
994 /* first get rid of the old state */
995 save_perl (aTHX_ prev);
996 /* setup coroutine call */ 1404 /* setup coroutine call */
997 setup_coro (aTHX_ next); 1405 coro_setup (aTHX_ next);
998 } 1406 }
999 else 1407 else
1408 load_perl (aTHX_ next);
1409
1410 assert (!prev->cctx);//D temporary
1411
1412 /* possibly untie and reuse the cctx */
1413 if (expect_true (
1414 cctx_current->idle_sp == STACKLEVEL
1415 && !(cctx_current->flags & CC_TRACE)
1416 && !force_cctx
1417 ))
1000 { 1418 {
1001 /* coroutine already started */ 1419 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1002 save_perl (aTHX_ prev); 1420 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1003 load_perl (aTHX_ next); 1421
1422 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1423 /* without this the next cctx_get might destroy the running cctx while still in use */
1424 if (expect_false (CCTX_EXPIRED (cctx_current)))
1425 if (expect_true (!next->cctx))
1426 next->cctx = cctx_get (aTHX);
1427
1428 cctx_put (cctx_current);
1004 } 1429 }
1430 else
1431 prev->cctx = cctx_current;
1005 1432
1006 prev__cctx = prev->cctx; 1433 ++next->usecount;
1007 1434
1008 /* possibly "free" the cctx */ 1435 cctx_prev = cctx_current;
1009 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)) 1436 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1437
1438 next->cctx = 0;
1439
1440 if (expect_false (cctx_prev != cctx_current))
1010 { 1441 {
1011 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1442 cctx_prev->top_env = PL_top_env;
1012 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1443 PL_top_env = cctx_current->top_env;
1013 1444 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1014 prev->cctx = 0;
1015
1016 cctx_put (prev__cctx);
1017 } 1445 }
1018 1446
1019 if (!next->cctx) 1447 transfer_tail (aTHX);
1020 next->cctx = cctx_get (aTHX);
1021
1022 if (prev__cctx != next->cctx)
1023 {
1024 prev__cctx->top_env = PL_top_env;
1025 PL_top_env = next->cctx->top_env;
1026 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1027 }
1028
1029 free_coro_mortal (aTHX);
1030 UNLOCK;
1031 } 1448 }
1032} 1449}
1033 1450
1034struct transfer_args
1035{
1036 struct coro *prev, *next;
1037};
1038
1039#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1451#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1040#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1452#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1041 1453
1042/** high level stuff ********************************************************/ 1454/** high level stuff ********************************************************/
1043 1455
1044static int 1456static int
1045coro_state_destroy (pTHX_ struct coro *coro) 1457coro_state_destroy (pTHX_ struct coro *coro)
1046{ 1458{
1047 if (coro->flags & CF_DESTROYED) 1459 if (coro->flags & CF_DESTROYED)
1048 return 0; 1460 return 0;
1461
1462 if (coro->on_destroy)
1463 coro->on_destroy (aTHX_ coro);
1049 1464
1050 coro->flags |= CF_DESTROYED; 1465 coro->flags |= CF_DESTROYED;
1051 1466
1052 if (coro->flags & CF_READY) 1467 if (coro->flags & CF_READY)
1053 { 1468 {
1054 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1469 /* reduce nready, as destroying a ready coro effectively unreadies it */
1055 /* alternative: look through all ready queues and remove the coro */ 1470 /* alternative: look through all ready queues and remove the coro */
1056 LOCK;
1057 --coro_nready; 1471 --coro_nready;
1058 UNLOCK;
1059 } 1472 }
1060 else 1473 else
1061 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1474 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1062 1475
1063 if (coro->mainstack && coro->mainstack != main_mainstack) 1476 if (coro->mainstack && coro->mainstack != main_mainstack)
1064 { 1477 {
1065 struct coro temp; 1478 struct coro temp;
1066 1479
1067 assert (!(coro->flags & CF_RUNNING)); 1480 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1068
1069 Zero (&temp, 1, struct coro);
1070 temp.save = CORO_SAVE_ALL;
1071
1072 if (coro->flags & CF_RUNNING)
1073 croak ("FATAL: tried to destroy currently running coroutine");
1074 1481
1075 save_perl (aTHX_ &temp); 1482 save_perl (aTHX_ &temp);
1076 load_perl (aTHX_ coro); 1483 load_perl (aTHX_ coro);
1077 1484
1078 coro_destroy_stacks (aTHX); 1485 coro_destruct (aTHX_ coro);
1079 1486
1080 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */ 1487 load_perl (aTHX_ &temp);
1081 1488
1082 coro->mainstack = 0; 1489 coro->slot = 0;
1083 } 1490 }
1084 1491
1085 cctx_destroy (coro->cctx); 1492 cctx_destroy (coro->cctx);
1493 SvREFCNT_dec (coro->startcv);
1086 SvREFCNT_dec (coro->args); 1494 SvREFCNT_dec (coro->args);
1495 SvREFCNT_dec (CORO_THROW);
1087 1496
1088 if (coro->next) coro->next->prev = coro->prev; 1497 if (coro->next) coro->next->prev = coro->prev;
1089 if (coro->prev) coro->prev->next = coro->next; 1498 if (coro->prev) coro->prev->next = coro->next;
1090 if (coro == coro_first) coro_first = coro->next; 1499 if (coro == coro_first) coro_first = coro->next;
1091 1500
… …
1129# define MGf_DUP 0 1538# define MGf_DUP 0
1130#endif 1539#endif
1131}; 1540};
1132 1541
1133static void 1542static void
1134prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1543prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1135{ 1544{
1136 ta->prev = SvSTATE (prev_sv); 1545 ta->prev = SvSTATE (prev_sv);
1137 ta->next = SvSTATE (next_sv); 1546 ta->next = SvSTATE (next_sv);
1138 TRANSFER_CHECK (*ta); 1547 TRANSFER_CHECK (*ta);
1139} 1548}
1140 1549
1141static void 1550static void
1142api_transfer (SV *prev_sv, SV *next_sv) 1551api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1143{ 1552{
1144 dTHX;
1145 struct transfer_args ta; 1553 struct coro_transfer_args ta;
1146 1554
1147 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1555 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1148 TRANSFER (ta); 1556 TRANSFER (ta, 1);
1149} 1557}
1150 1558
1151static int 1559/*****************************************************************************/
1152api_save (SV *coro_sv, int new_save) 1560/* gensub: simple closure generation utility */
1153{
1154 dTHX;
1155 struct coro *coro = SvSTATE (coro_sv);
1156 int old_save = coro->save;
1157 1561
1158 if (new_save >= 0) 1562#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1159 coro->save = new_save;
1160 1563
1161 return old_save; 1564/* create a closure from XS, returns a code reference */
1565/* the arg can be accessed via GENSUB_ARG from the callback */
1566/* the callback must use dXSARGS/XSRETURN */
1567static SV *
1568gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1569{
1570 CV *cv = (CV *)newSV (0);
1571
1572 sv_upgrade ((SV *)cv, SVt_PVCV);
1573
1574 CvANON_on (cv);
1575 CvISXSUB_on (cv);
1576 CvXSUB (cv) = xsub;
1577 GENSUB_ARG = arg;
1578
1579 return newRV_noinc ((SV *)cv);
1162} 1580}
1163 1581
1164/** Coro ********************************************************************/ 1582/** Coro ********************************************************************/
1165 1583
1166static void 1584INLINE void
1167coro_enq (pTHX_ SV *coro_sv) 1585coro_enq (pTHX_ struct coro *coro)
1168{ 1586{
1169 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1587 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1170} 1588}
1171 1589
1172static SV * 1590INLINE SV *
1173coro_deq (pTHX_ int min_prio) 1591coro_deq (pTHX)
1174{ 1592{
1175 int prio = PRIO_MAX - PRIO_MIN; 1593 int prio;
1176 1594
1177 min_prio -= PRIO_MIN;
1178 if (min_prio < 0)
1179 min_prio = 0;
1180
1181 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1595 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1182 if (AvFILLp (coro_ready [prio]) >= 0) 1596 if (AvFILLp (coro_ready [prio]) >= 0)
1183 return av_shift (coro_ready [prio]); 1597 return av_shift (coro_ready [prio]);
1184 1598
1185 return 0; 1599 return 0;
1186} 1600}
1187 1601
1188static int 1602static int
1189api_ready (SV *coro_sv) 1603api_ready (pTHX_ SV *coro_sv)
1190{ 1604{
1191 dTHX;
1192 struct coro *coro; 1605 struct coro *coro;
1193 1606 SV *sv_hook;
1194 if (SvROK (coro_sv)) 1607 void (*xs_hook)(void);
1195 coro_sv = SvRV (coro_sv);
1196 1608
1197 coro = SvSTATE (coro_sv); 1609 coro = SvSTATE (coro_sv);
1198 1610
1199 if (coro->flags & CF_READY) 1611 if (coro->flags & CF_READY)
1200 return 0; 1612 return 0;
1201 1613
1202 coro->flags |= CF_READY; 1614 coro->flags |= CF_READY;
1203 1615
1204 LOCK; 1616 sv_hook = coro_nready ? 0 : coro_readyhook;
1205 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1617 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1618
1619 coro_enq (aTHX_ coro);
1206 ++coro_nready; 1620 ++coro_nready;
1207 UNLOCK; 1621
1622 if (sv_hook)
1623 {
1624 dSP;
1625
1626 ENTER;
1627 SAVETMPS;
1628
1629 PUSHMARK (SP);
1630 PUTBACK;
1631 call_sv (sv_hook, G_VOID | G_DISCARD);
1632
1633 FREETMPS;
1634 LEAVE;
1635 }
1636
1637 if (xs_hook)
1638 xs_hook ();
1208 1639
1209 return 1; 1640 return 1;
1210} 1641}
1211 1642
1212static int 1643static int
1213api_is_ready (SV *coro_sv) 1644api_is_ready (pTHX_ SV *coro_sv)
1214{ 1645{
1215 dTHX;
1216 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1646 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1217} 1647}
1218 1648
1649/* expects to own a reference to next->hv */
1650INLINE void
1651prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1652{
1653 SV *prev_sv = SvRV (coro_current);
1654
1655 ta->prev = SvSTATE_hv (prev_sv);
1656 ta->next = next;
1657
1658 TRANSFER_CHECK (*ta);
1659
1660 SvRV_set (coro_current, (SV *)next->hv);
1661
1662 free_coro_mortal (aTHX);
1663 coro_mortal = prev_sv;
1664}
1665
1219static void 1666static void
1220prepare_schedule (pTHX_ struct transfer_args *ta) 1667prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1221{ 1668{
1222 SV *prev_sv, *next_sv;
1223
1224 for (;;) 1669 for (;;)
1225 { 1670 {
1226 LOCK;
1227 next_sv = coro_deq (aTHX_ PRIO_MIN); 1671 SV *next_sv = coro_deq (aTHX);
1228 1672
1673 if (expect_true (next_sv))
1674 {
1675 struct coro *next = SvSTATE_hv (next_sv);
1676
1677 /* cannot transfer to destroyed coros, skip and look for next */
1678 if (expect_false (next->flags & CF_DESTROYED))
1679 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1680 else
1681 {
1682 next->flags &= ~CF_READY;
1683 --coro_nready;
1684
1685 prepare_schedule_to (aTHX_ ta, next);
1686 break;
1687 }
1688 }
1689 else
1690 {
1229 /* nothing to schedule: call the idle handler */ 1691 /* nothing to schedule: call the idle handler */
1230 if (!next_sv) 1692 if (SvROK (sv_idle)
1693 && SvOBJECT (SvRV (sv_idle)))
1694 {
1695 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1696 api_ready (aTHX_ SvRV (sv_idle));
1697 --coro_nready;
1698 }
1699 else
1700 {
1701 dSP;
1702
1703 ENTER;
1704 SAVETMPS;
1705
1706 PUSHMARK (SP);
1707 PUTBACK;
1708 call_sv (sv_idle, G_VOID | G_DISCARD);
1709
1710 FREETMPS;
1711 LEAVE;
1712 }
1713 }
1714 }
1715}
1716
1717INLINE void
1718prepare_cede (pTHX_ struct coro_transfer_args *ta)
1719{
1720 api_ready (aTHX_ coro_current);
1721 prepare_schedule (aTHX_ ta);
1722}
1723
1724INLINE void
1725prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1726{
1727 SV *prev = SvRV (coro_current);
1728
1729 if (coro_nready)
1730 {
1731 prepare_schedule (aTHX_ ta);
1732 api_ready (aTHX_ prev);
1733 }
1734 else
1735 prepare_nop (aTHX_ ta);
1736}
1737
1738static void
1739api_schedule (pTHX)
1740{
1741 struct coro_transfer_args ta;
1742
1743 prepare_schedule (aTHX_ &ta);
1744 TRANSFER (ta, 1);
1745}
1746
1747static void
1748api_schedule_to (pTHX_ SV *coro_sv)
1749{
1750 struct coro_transfer_args ta;
1751 struct coro *next = SvSTATE (coro_sv);
1752
1753 SvREFCNT_inc_NN (coro_sv);
1754 prepare_schedule_to (aTHX_ &ta, next);
1755}
1756
1757static int
1758api_cede (pTHX)
1759{
1760 struct coro_transfer_args ta;
1761
1762 prepare_cede (aTHX_ &ta);
1763
1764 if (expect_true (ta.prev != ta.next))
1765 {
1766 TRANSFER (ta, 1);
1767 return 1;
1768 }
1769 else
1770 return 0;
1771}
1772
1773static int
1774api_cede_notself (pTHX)
1775{
1776 if (coro_nready)
1777 {
1778 struct coro_transfer_args ta;
1779
1780 prepare_cede_notself (aTHX_ &ta);
1781 TRANSFER (ta, 1);
1782 return 1;
1783 }
1784 else
1785 return 0;
1786}
1787
1788static void
1789api_trace (pTHX_ SV *coro_sv, int flags)
1790{
1791 struct coro *coro = SvSTATE (coro_sv);
1792
1793 if (coro->flags & CF_RUNNING)
1794 croak ("cannot enable tracing on a running coroutine, caught");
1795
1796 if (flags & CC_TRACE)
1797 {
1798 if (!coro->cctx)
1799 coro->cctx = cctx_new_run ();
1800 else if (!(coro->cctx->flags & CC_TRACE))
1801 croak ("cannot enable tracing on coroutine with custom stack, caught");
1802
1803 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1804 }
1805 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1806 {
1807 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1808
1809 if (coro->flags & CF_RUNNING)
1810 PL_runops = RUNOPS_DEFAULT;
1811 else
1812 coro->slot->runops = RUNOPS_DEFAULT;
1813 }
1814}
1815
1816static void
1817coro_call_on_destroy (pTHX_ struct coro *coro)
1818{
1819 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1820 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1821
1822 if (on_destroyp)
1823 {
1824 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1825
1826 while (AvFILLp (on_destroy) >= 0)
1827 {
1828 dSP; /* don't disturb outer sp */
1829 SV *cb = av_pop (on_destroy);
1830
1831 PUSHMARK (SP);
1832
1833 if (statusp)
1834 {
1835 int i;
1836 AV *status = (AV *)SvRV (*statusp);
1837 EXTEND (SP, AvFILLp (status) + 1);
1838
1839 for (i = 0; i <= AvFILLp (status); ++i)
1840 PUSHs (AvARRAY (status)[i]);
1841 }
1842
1843 PUTBACK;
1844 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1845 }
1846 }
1847}
1848
1849static void
1850slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1851{
1852 int i;
1853 HV *hv = (HV *)SvRV (coro_current);
1854 AV *av = newAV ();
1855
1856 av_extend (av, items - 1);
1857 for (i = 0; i < items; ++i)
1858 av_push (av, SvREFCNT_inc_NN (arg [i]));
1859
1860 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1861
1862 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1863 api_ready (aTHX_ sv_manager);
1864
1865 frame->prepare = prepare_schedule;
1866 frame->check = slf_check_repeat;
1867}
1868
1869/*****************************************************************************/
1870/* async pool handler */
1871
1872static int
1873slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1874{
1875 HV *hv = (HV *)SvRV (coro_current);
1876 struct coro *coro = (struct coro *)frame->data;
1877
1878 if (!coro->invoke_cb)
1879 return 1; /* loop till we have invoke */
1880 else
1881 {
1882 hv_store (hv, "desc", sizeof ("desc") - 1,
1883 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1884
1885 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1886
1887 {
1888 dSP;
1889 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1890 PUTBACK;
1891 }
1892
1893 SvREFCNT_dec (GvAV (PL_defgv));
1894 GvAV (PL_defgv) = coro->invoke_av;
1895 coro->invoke_av = 0;
1896
1897 return 0;
1898 }
1899}
1900
1901static void
1902slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1903{
1904 HV *hv = (HV *)SvRV (coro_current);
1905 struct coro *coro = SvSTATE_hv ((SV *)hv);
1906
1907 if (expect_true (coro->saved_deffh))
1908 {
1909 /* subsequent iteration */
1910 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1911 coro->saved_deffh = 0;
1912
1913 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1914 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1915 {
1916 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1917 coro->invoke_av = newAV ();
1918
1919 frame->prepare = prepare_nop;
1920 }
1921 else
1922 {
1923 av_clear (GvAV (PL_defgv));
1924 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1925
1926 coro->prio = 0;
1927
1928 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1929 api_trace (aTHX_ coro_current, 0);
1930
1931 frame->prepare = prepare_schedule;
1932 av_push (av_async_pool, SvREFCNT_inc (hv));
1933 }
1934 }
1935 else
1936 {
1937 /* first iteration, simply fall through */
1938 frame->prepare = prepare_nop;
1939 }
1940
1941 frame->check = slf_check_pool_handler;
1942 frame->data = (void *)coro;
1943}
1944
1945/*****************************************************************************/
1946/* rouse callback */
1947
1948#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1949
1950static void
1951coro_rouse_callback (pTHX_ CV *cv)
1952{
1953 dXSARGS;
1954 SV *data = (SV *)GENSUB_ARG;
1955
1956 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1957 {
1958 /* first call, set args */
1959 AV *av = newAV ();
1960 SV *coro = SvRV (data);
1961
1962 SvRV_set (data, (SV *)av);
1963 api_ready (aTHX_ coro);
1964 SvREFCNT_dec (coro);
1965
1966 /* better take a full copy of the arguments */
1967 while (items--)
1968 av_store (av, items, newSVsv (ST (items)));
1969 }
1970
1971 XSRETURN_EMPTY;
1972}
1973
1974static int
1975slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1976{
1977 SV *data = (SV *)frame->data;
1978
1979 if (CORO_THROW)
1980 return 0;
1981
1982 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1983 return 1;
1984
1985 /* now push all results on the stack */
1986 {
1987 dSP;
1988 AV *av = (AV *)SvRV (data);
1989 int i;
1990
1991 EXTEND (SP, AvFILLp (av) + 1);
1992 for (i = 0; i <= AvFILLp (av); ++i)
1993 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1994
1995 /* we have stolen the elements, so ste length to zero and free */
1996 AvFILLp (av) = -1;
1997 av_undef (av);
1998
1999 PUTBACK;
2000 }
2001
2002 return 0;
2003}
2004
2005static void
2006slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2007{
2008 SV *cb;
2009
2010 if (items)
2011 cb = arg [0];
2012 else
2013 {
2014 struct coro *coro = SvSTATE_current;
2015
2016 if (!coro->rouse_cb)
2017 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2018
2019 cb = sv_2mortal (coro->rouse_cb);
2020 coro->rouse_cb = 0;
2021 }
2022
2023 if (!SvROK (cb)
2024 || SvTYPE (SvRV (cb)) != SVt_PVCV
2025 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2026 croak ("Coro::rouse_wait called with illegal callback argument,");
2027
2028 {
2029 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2030 SV *data = (SV *)GENSUB_ARG;
2031
2032 frame->data = (void *)data;
2033 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2034 frame->check = slf_check_rouse_wait;
2035 }
2036}
2037
2038static SV *
2039coro_new_rouse_cb (pTHX)
2040{
2041 HV *hv = (HV *)SvRV (coro_current);
2042 struct coro *coro = SvSTATE_hv (hv);
2043 SV *data = newRV_inc ((SV *)hv);
2044 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2045
2046 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2047 SvREFCNT_dec (data); /* magicext increases the refcount */
2048
2049 SvREFCNT_dec (coro->rouse_cb);
2050 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2051
2052 return cb;
2053}
2054
2055/*****************************************************************************/
2056/* schedule-like-function opcode (SLF) */
2057
2058static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2059static const CV *slf_cv;
2060static SV **slf_argv;
2061static int slf_argc, slf_arga; /* count, allocated */
2062static I32 slf_ax; /* top of stack, for restore */
2063
2064/* this restores the stack in the case we patched the entersub, to */
2065/* recreate the stack frame as perl will on following calls */
2066/* since entersub cleared the stack */
2067static OP *
2068pp_restore (pTHX)
2069{
2070 int i;
2071 SV **SP = PL_stack_base + slf_ax;
2072
2073 PUSHMARK (SP);
2074
2075 EXTEND (SP, slf_argc + 1);
2076
2077 for (i = 0; i < slf_argc; ++i)
2078 PUSHs (sv_2mortal (slf_argv [i]));
2079
2080 PUSHs ((SV *)CvGV (slf_cv));
2081
2082 RETURNOP (slf_restore.op_first);
2083}
2084
2085static void
2086slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2087{
2088 SV **arg = (SV **)slf_frame.data;
2089
2090 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2091}
2092
2093static void
2094slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2095{
2096 if (items != 2)
2097 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2098
2099 frame->prepare = slf_prepare_transfer;
2100 frame->check = slf_check_nop;
2101 frame->data = (void *)arg; /* let's hope it will stay valid */
2102}
2103
2104static void
2105slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 frame->prepare = prepare_schedule;
2108 frame->check = slf_check_nop;
2109}
2110
2111static void
2112slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2113{
2114 struct coro *next = (struct coro *)slf_frame.data;
2115
2116 SvREFCNT_inc_NN (next->hv);
2117 prepare_schedule_to (aTHX_ ta, next);
2118}
2119
2120static void
2121slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2122{
2123 if (!items)
2124 croak ("Coro::schedule_to expects a coroutine argument, caught");
2125
2126 frame->data = (void *)SvSTATE (arg [0]);
2127 frame->prepare = slf_prepare_schedule_to;
2128 frame->check = slf_check_nop;
2129}
2130
2131static void
2132slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 api_ready (aTHX_ SvRV (coro_current));
2135
2136 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2137}
2138
2139static void
2140slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2141{
2142 frame->prepare = prepare_cede;
2143 frame->check = slf_check_nop;
2144}
2145
2146static void
2147slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2148{
2149 frame->prepare = prepare_cede_notself;
2150 frame->check = slf_check_nop;
2151}
2152
2153/*
2154 * these not obviously related functions are all rolled into one
2155 * function to increase chances that they all will call transfer with the same
2156 * stack offset
2157 * SLF stands for "schedule-like-function".
2158 */
2159static OP *
2160pp_slf (pTHX)
2161{
2162 I32 checkmark; /* mark SP to see how many elements check has pushed */
2163
2164 /* set up the slf frame, unless it has already been set-up */
2165 /* the latter happens when a new coro has been started */
2166 /* or when a new cctx was attached to an existing coroutine */
2167 if (expect_true (!slf_frame.prepare))
2168 {
2169 /* first iteration */
2170 dSP;
2171 SV **arg = PL_stack_base + TOPMARK + 1;
2172 int items = SP - arg; /* args without function object */
2173 SV *gv = *sp;
2174
2175 /* do a quick consistency check on the "function" object, and if it isn't */
2176 /* for us, divert to the real entersub */
2177 if (SvTYPE (gv) != SVt_PVGV
2178 || !GvCV (gv)
2179 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2180 return PL_ppaddr[OP_ENTERSUB](aTHX);
2181
2182 if (!(PL_op->op_flags & OPf_STACKED))
2183 {
2184 /* ampersand-form of call, use @_ instead of stack */
2185 AV *av = GvAV (PL_defgv);
2186 arg = AvARRAY (av);
2187 items = AvFILLp (av) + 1;
2188 }
2189
2190 /* now call the init function, which needs to set up slf_frame */
2191 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2192 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2193
2194 /* pop args */
2195 SP = PL_stack_base + POPMARK;
2196
2197 PUTBACK;
2198 }
2199
2200 /* now that we have a slf_frame, interpret it! */
2201 /* we use a callback system not to make the code needlessly */
2202 /* complicated, but so we can run multiple perl coros from one cctx */
2203
2204 do
2205 {
2206 struct coro_transfer_args ta;
2207
2208 slf_frame.prepare (aTHX_ &ta);
2209 TRANSFER (ta, 0);
2210
2211 checkmark = PL_stack_sp - PL_stack_base;
2212 }
2213 while (slf_frame.check (aTHX_ &slf_frame));
2214
2215 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2216
2217 /* exception handling */
2218 if (expect_false (CORO_THROW))
2219 {
2220 SV *exception = sv_2mortal (CORO_THROW);
2221
2222 CORO_THROW = 0;
2223 sv_setsv (ERRSV, exception);
2224 croak (0);
2225 }
2226
2227 /* return value handling - mostly like entersub */
2228 /* make sure we put something on the stack in scalar context */
2229 if (GIMME_V == G_SCALAR)
2230 {
2231 dSP;
2232 SV **bot = PL_stack_base + checkmark;
2233
2234 if (sp == bot) /* too few, push undef */
2235 bot [1] = &PL_sv_undef;
2236 else if (sp != bot + 1) /* too many, take last one */
2237 bot [1] = *sp;
2238
2239 SP = bot + 1;
2240
2241 PUTBACK;
2242 }
2243
2244 return NORMAL;
2245}
2246
2247static void
2248api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2249{
2250 int i;
2251 SV **arg = PL_stack_base + ax;
2252 int items = PL_stack_sp - arg + 1;
2253
2254 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2255
2256 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2257 && PL_op->op_ppaddr != pp_slf)
2258 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2259
2260 CvFLAGS (cv) |= CVf_SLF;
2261 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2262 slf_cv = cv;
2263
2264 /* we patch the op, and then re-run the whole call */
2265 /* we have to put the same argument on the stack for this to work */
2266 /* and this will be done by pp_restore */
2267 slf_restore.op_next = (OP *)&slf_restore;
2268 slf_restore.op_type = OP_CUSTOM;
2269 slf_restore.op_ppaddr = pp_restore;
2270 slf_restore.op_first = PL_op;
2271
2272 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2273
2274 if (PL_op->op_flags & OPf_STACKED)
2275 {
2276 if (items > slf_arga)
2277 {
2278 slf_arga = items;
2279 free (slf_argv);
2280 slf_argv = malloc (slf_arga * sizeof (SV *));
2281 }
2282
2283 slf_argc = items;
2284
2285 for (i = 0; i < items; ++i)
2286 slf_argv [i] = SvREFCNT_inc (arg [i]);
2287 }
2288 else
2289 slf_argc = 0;
2290
2291 PL_op->op_ppaddr = pp_slf;
2292 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2293
2294 PL_op = (OP *)&slf_restore;
2295}
2296
2297/*****************************************************************************/
2298/* PerlIO::cede */
2299
2300typedef struct
2301{
2302 PerlIOBuf base;
2303 NV next, every;
2304} PerlIOCede;
2305
2306static IV
2307PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2308{
2309 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2310
2311 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2312 self->next = nvtime () + self->every;
2313
2314 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2315}
2316
2317static SV *
2318PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2319{
2320 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2321
2322 return newSVnv (self->every);
2323}
2324
2325static IV
2326PerlIOCede_flush (pTHX_ PerlIO *f)
2327{
2328 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2329 double now = nvtime ();
2330
2331 if (now >= self->next)
2332 {
2333 api_cede (aTHX);
2334 self->next = now + self->every;
2335 }
2336
2337 return PerlIOBuf_flush (aTHX_ f);
2338}
2339
2340static PerlIO_funcs PerlIO_cede =
2341{
2342 sizeof(PerlIO_funcs),
2343 "cede",
2344 sizeof(PerlIOCede),
2345 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2346 PerlIOCede_pushed,
2347 PerlIOBuf_popped,
2348 PerlIOBuf_open,
2349 PerlIOBase_binmode,
2350 PerlIOCede_getarg,
2351 PerlIOBase_fileno,
2352 PerlIOBuf_dup,
2353 PerlIOBuf_read,
2354 PerlIOBuf_unread,
2355 PerlIOBuf_write,
2356 PerlIOBuf_seek,
2357 PerlIOBuf_tell,
2358 PerlIOBuf_close,
2359 PerlIOCede_flush,
2360 PerlIOBuf_fill,
2361 PerlIOBase_eof,
2362 PerlIOBase_error,
2363 PerlIOBase_clearerr,
2364 PerlIOBase_setlinebuf,
2365 PerlIOBuf_get_base,
2366 PerlIOBuf_bufsiz,
2367 PerlIOBuf_get_ptr,
2368 PerlIOBuf_get_cnt,
2369 PerlIOBuf_set_ptrcnt,
2370};
2371
2372/*****************************************************************************/
2373/* Coro::Semaphore & Coro::Signal */
2374
2375static SV *
2376coro_waitarray_new (pTHX_ int count)
2377{
2378 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2379 AV *av = newAV ();
2380 SV **ary;
2381
2382 /* unfortunately, building manually saves memory */
2383 Newx (ary, 2, SV *);
2384 AvALLOC (av) = ary;
2385#if PERL_VERSION_ATLEAST (5,10,0)
2386 AvARRAY (av) = ary;
2387#else
2388 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2389 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2390 SvPVX ((SV *)av) = (char *)ary;
2391#endif
2392 AvMAX (av) = 1;
2393 AvFILLp (av) = 0;
2394 ary [0] = newSViv (count);
2395
2396 return newRV_noinc ((SV *)av);
2397}
2398
2399/* semaphore */
2400
2401static void
2402coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2403{
2404 SV *count_sv = AvARRAY (av)[0];
2405 IV count = SvIVX (count_sv);
2406
2407 count += adjust;
2408 SvIVX (count_sv) = count;
2409
2410 /* now wake up as many waiters as are expected to lock */
2411 while (count > 0 && AvFILLp (av) > 0)
2412 {
2413 SV *cb;
2414
2415 /* swap first two elements so we can shift a waiter */
2416 AvARRAY (av)[0] = AvARRAY (av)[1];
2417 AvARRAY (av)[1] = count_sv;
2418 cb = av_shift (av);
2419
2420 if (SvOBJECT (cb))
2421 {
2422 api_ready (aTHX_ cb);
2423 --count;
2424 }
2425 else if (SvTYPE (cb) == SVt_PVCV)
1231 { 2426 {
1232 dSP; 2427 dSP;
1233 UNLOCK;
1234
1235 ENTER;
1236 SAVETMPS;
1237
1238 PUSHMARK (SP); 2428 PUSHMARK (SP);
2429 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1239 PUTBACK; 2430 PUTBACK;
1240 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2431 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1241
1242 FREETMPS;
1243 LEAVE;
1244 continue;
1245 } 2432 }
1246 2433
1247 ta->next = SvSTATE (next_sv); 2434 SvREFCNT_dec (cb);
2435 }
2436}
1248 2437
1249 /* cannot transfer to destroyed coros, skip and look for next */ 2438static void
1250 if (ta->next->flags & CF_DESTROYED) 2439coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2440{
2441 /* call $sem->adjust (0) to possibly wake up some other waiters */
2442 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2443}
2444
2445static int
2446slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2447{
2448 AV *av = (AV *)frame->data;
2449 SV *count_sv = AvARRAY (av)[0];
2450
2451 /* if we are about to throw, don't actually acquire the lock, just throw */
2452 if (CORO_THROW)
2453 return 0;
2454 else if (SvIVX (count_sv) > 0)
2455 {
2456 SvSTATE_current->on_destroy = 0;
2457
2458 if (acquire)
2459 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2460 else
2461 coro_semaphore_adjust (aTHX_ av, 0);
2462
2463 return 0;
2464 }
2465 else
2466 {
2467 int i;
2468 /* if we were woken up but can't down, we look through the whole */
2469 /* waiters list and only add us if we aren't in there already */
2470 /* this avoids some degenerate memory usage cases */
2471
2472 for (i = 1; i <= AvFILLp (av); ++i)
2473 if (AvARRAY (av)[i] == SvRV (coro_current))
2474 return 1;
2475
2476 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2477 return 1;
2478 }
2479}
2480
2481static int
2482slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2483{
2484 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2485}
2486
2487static int
2488slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2489{
2490 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2491}
2492
2493static void
2494slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2495{
2496 AV *av = (AV *)SvRV (arg [0]);
2497
2498 if (SvIVX (AvARRAY (av)[0]) > 0)
2499 {
2500 frame->data = (void *)av;
2501 frame->prepare = prepare_nop;
2502 }
2503 else
2504 {
2505 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2506
2507 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2508 frame->prepare = prepare_schedule;
2509
2510 /* to avoid race conditions when a woken-up coro gets terminated */
2511 /* we arrange for a temporary on_destroy that calls adjust (0) */
2512 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2513 }
2514}
2515
2516static void
2517slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2518{
2519 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2520 frame->check = slf_check_semaphore_down;
2521}
2522
2523static void
2524slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2525{
2526 if (items >= 2)
2527 {
2528 /* callback form */
2529 AV *av = (AV *)SvRV (arg [0]);
2530 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2531
2532 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2533
2534 if (SvIVX (AvARRAY (av)[0]) > 0)
2535 coro_semaphore_adjust (aTHX_ av, 0);
2536
2537 frame->prepare = prepare_nop;
2538 frame->check = slf_check_nop;
2539 }
2540 else
2541 {
2542 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2543 frame->check = slf_check_semaphore_wait;
2544 }
2545}
2546
2547/* signal */
2548
2549static void
2550coro_signal_wake (pTHX_ AV *av, int count)
2551{
2552 SvIVX (AvARRAY (av)[0]) = 0;
2553
2554 /* now signal count waiters */
2555 while (count > 0 && AvFILLp (av) > 0)
2556 {
2557 SV *cb;
2558
2559 /* swap first two elements so we can shift a waiter */
2560 cb = AvARRAY (av)[0];
2561 AvARRAY (av)[0] = AvARRAY (av)[1];
2562 AvARRAY (av)[1] = cb;
2563
2564 cb = av_shift (av);
2565
2566 api_ready (aTHX_ cb);
2567 sv_setiv (cb, 0); /* signal waiter */
2568 SvREFCNT_dec (cb);
2569
2570 --count;
2571 }
2572}
2573
2574static int
2575slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2576{
2577 /* if we are about to throw, also stop waiting */
2578 return SvROK ((SV *)frame->data) && !CORO_THROW;
2579}
2580
2581static void
2582slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2583{
2584 AV *av = (AV *)SvRV (arg [0]);
2585
2586 if (SvIVX (AvARRAY (av)[0]))
2587 {
2588 SvIVX (AvARRAY (av)[0]) = 0;
2589 frame->prepare = prepare_nop;
2590 frame->check = slf_check_nop;
2591 }
2592 else
2593 {
2594 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2595
2596 av_push (av, waiter);
2597
2598 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2599 frame->prepare = prepare_schedule;
2600 frame->check = slf_check_signal_wait;
2601 }
2602}
2603
2604/*****************************************************************************/
2605/* Coro::AIO */
2606
2607#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2608
2609/* helper storage struct */
2610struct io_state
2611{
2612 int errorno;
2613 I32 laststype; /* U16 in 5.10.0 */
2614 int laststatval;
2615 Stat_t statcache;
2616};
2617
2618static void
2619coro_aio_callback (pTHX_ CV *cv)
2620{
2621 dXSARGS;
2622 AV *state = (AV *)GENSUB_ARG;
2623 SV *coro = av_pop (state);
2624 SV *data_sv = newSV (sizeof (struct io_state));
2625
2626 av_extend (state, items - 1);
2627
2628 sv_upgrade (data_sv, SVt_PV);
2629 SvCUR_set (data_sv, sizeof (struct io_state));
2630 SvPOK_only (data_sv);
2631
2632 {
2633 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2634
2635 data->errorno = errno;
2636 data->laststype = PL_laststype;
2637 data->laststatval = PL_laststatval;
2638 data->statcache = PL_statcache;
2639 }
2640
2641 /* now build the result vector out of all the parameters and the data_sv */
2642 {
2643 int i;
2644
2645 for (i = 0; i < items; ++i)
2646 av_push (state, SvREFCNT_inc_NN (ST (i)));
2647 }
2648
2649 av_push (state, data_sv);
2650
2651 api_ready (aTHX_ coro);
2652 SvREFCNT_dec (coro);
2653 SvREFCNT_dec ((AV *)state);
2654}
2655
2656static int
2657slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2658{
2659 AV *state = (AV *)frame->data;
2660
2661 /* if we are about to throw, return early */
2662 /* this does not cancel the aio request, but at least */
2663 /* it quickly returns */
2664 if (CORO_THROW)
2665 return 0;
2666
2667 /* one element that is an RV? repeat! */
2668 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2669 return 1;
2670
2671 /* restore status */
2672 {
2673 SV *data_sv = av_pop (state);
2674 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2675
2676 errno = data->errorno;
2677 PL_laststype = data->laststype;
2678 PL_laststatval = data->laststatval;
2679 PL_statcache = data->statcache;
2680
2681 SvREFCNT_dec (data_sv);
2682 }
2683
2684 /* push result values */
2685 {
2686 dSP;
2687 int i;
2688
2689 EXTEND (SP, AvFILLp (state) + 1);
2690 for (i = 0; i <= AvFILLp (state); ++i)
2691 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2692
2693 PUTBACK;
2694 }
2695
2696 return 0;
2697}
2698
2699static void
2700slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2701{
2702 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2703 SV *coro_hv = SvRV (coro_current);
2704 struct coro *coro = SvSTATE_hv (coro_hv);
2705
2706 /* put our coroutine id on the state arg */
2707 av_push (state, SvREFCNT_inc_NN (coro_hv));
2708
2709 /* first see whether we have a non-zero priority and set it as AIO prio */
2710 if (coro->prio)
2711 {
2712 dSP;
2713
2714 static SV *prio_cv;
2715 static SV *prio_sv;
2716
2717 if (expect_false (!prio_cv))
1251 { 2718 {
1252 UNLOCK; 2719 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1253 SvREFCNT_dec (next_sv); 2720 prio_sv = newSViv (0);
1254 /* coro_nready is already taken care of by destroy */
1255 continue;
1256 } 2721 }
1257 2722
1258 --coro_nready; 2723 PUSHMARK (SP);
1259 UNLOCK; 2724 sv_setiv (prio_sv, coro->prio);
1260 break; 2725 XPUSHs (prio_sv);
1261 }
1262 2726
1263 /* free this only after the transfer */ 2727 PUTBACK;
1264 prev_sv = SvRV (coro_current); 2728 call_sv (prio_cv, G_VOID | G_DISCARD);
1265 ta->prev = SvSTATE (prev_sv);
1266 TRANSFER_CHECK (*ta);
1267 assert (ta->next->flags & CF_READY);
1268 ta->next->flags &= ~CF_READY;
1269 SvRV_set (coro_current, next_sv);
1270
1271 LOCK;
1272 free_coro_mortal (aTHX);
1273 coro_mortal = prev_sv;
1274 UNLOCK;
1275}
1276
1277static void
1278prepare_cede (pTHX_ struct transfer_args *ta)
1279{
1280 api_ready (coro_current);
1281 prepare_schedule (aTHX_ ta);
1282}
1283
1284static int
1285prepare_cede_notself (pTHX_ struct transfer_args *ta)
1286{
1287 if (coro_nready)
1288 { 2729 }
1289 SV *prev = SvRV (coro_current); 2730
1290 prepare_schedule (aTHX_ ta); 2731 /* now call the original request */
1291 api_ready (prev); 2732 {
1292 return 1; 2733 dSP;
2734 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2735 int i;
2736
2737 PUSHMARK (SP);
2738
2739 /* first push all args to the stack */
2740 EXTEND (SP, items + 1);
2741
2742 for (i = 0; i < items; ++i)
2743 PUSHs (arg [i]);
2744
2745 /* now push the callback closure */
2746 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2747
2748 /* now call the AIO function - we assume our request is uncancelable */
2749 PUTBACK;
2750 call_sv ((SV *)req, G_VOID | G_DISCARD);
1293 } 2751 }
1294 else
1295 return 0;
1296}
1297 2752
1298static void 2753 /* now that the requets is going, we loop toll we have a result */
1299api_schedule (void) 2754 frame->data = (void *)state;
1300{ 2755 frame->prepare = prepare_schedule;
1301 dTHX; 2756 frame->check = slf_check_aio_req;
1302 struct transfer_args ta;
1303
1304 prepare_schedule (aTHX_ &ta);
1305 TRANSFER (ta);
1306} 2757}
1307 2758
1308static int 2759static void
1309api_cede (void) 2760coro_aio_req_xs (pTHX_ CV *cv)
1310{ 2761{
1311 dTHX; 2762 dXSARGS;
1312 struct transfer_args ta;
1313 2763
1314 prepare_cede (aTHX_ &ta); 2764 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1315 2765
1316 if (ta.prev != ta.next) 2766 XSRETURN_EMPTY;
1317 {
1318 TRANSFER (ta);
1319 return 1;
1320 }
1321 else
1322 return 0;
1323} 2767}
1324 2768
1325static int 2769/*****************************************************************************/
1326api_cede_notself (void)
1327{
1328 dTHX;
1329 struct transfer_args ta;
1330 2770
1331 if (prepare_cede_notself (aTHX_ &ta)) 2771#if CORO_CLONE
1332 { 2772# include "clone.c"
1333 TRANSFER (ta); 2773#endif
1334 return 1;
1335 }
1336 else
1337 return 0;
1338}
1339 2774
1340MODULE = Coro::State PACKAGE = Coro::State 2775MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1341 2776
1342PROTOTYPES: DISABLE 2777PROTOTYPES: DISABLE
1343 2778
1344BOOT: 2779BOOT:
1345{ 2780{
1346#ifdef USE_ITHREADS 2781#ifdef USE_ITHREADS
1347 MUTEX_INIT (&coro_mutex); 2782# if CORO_PTHREAD
2783 coro_thx = PERL_GET_CONTEXT;
2784# endif
1348#endif 2785#endif
1349 BOOT_PAGESIZE; 2786 BOOT_PAGESIZE;
2787
2788 cctx_current = cctx_new_empty ();
2789
2790 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2791 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2792
2793 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2794 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2795 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2796
2797 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2798 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2799 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1350 2800
1351 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2801 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1352 2802
1353 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2803 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1354 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2804 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1355 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE)); 2805 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1356 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL)); 2806 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1357 2807
1358 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1359 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1360 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1361 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1362 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1363 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1364 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1365
1366 main_mainstack = PL_mainstack; 2808 main_mainstack = PL_mainstack;
1367 main_top_env = PL_top_env; 2809 main_top_env = PL_top_env;
1368 2810
1369 while (main_top_env->je_prev) 2811 while (main_top_env->je_prev)
1370 main_top_env = main_top_env->je_prev; 2812 main_top_env = main_top_env->je_prev;
1371 2813
2814 {
2815 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2816
2817 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2818 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2819
2820 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2821 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2822 }
2823
1372 coroapi.ver = CORO_API_VERSION; 2824 coroapi.ver = CORO_API_VERSION;
2825 coroapi.rev = CORO_API_REVISION;
2826
1373 coroapi.transfer = api_transfer; 2827 coroapi.transfer = api_transfer;
2828
2829 coroapi.sv_state = SvSTATE_;
2830 coroapi.execute_slf = api_execute_slf;
2831 coroapi.prepare_nop = prepare_nop;
2832 coroapi.prepare_schedule = prepare_schedule;
2833 coroapi.prepare_cede = prepare_cede;
2834 coroapi.prepare_cede_notself = prepare_cede_notself;
2835
2836 {
2837 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2838
2839 if (!svp) croak ("Time::HiRes is required");
2840 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2841
2842 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2843 }
1374 2844
1375 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2845 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1376} 2846}
1377 2847
1378SV * 2848SV *
1379new (char *klass, ...) 2849new (char *klass, ...)
2850 ALIAS:
2851 Coro::new = 1
1380 CODE: 2852 CODE:
1381{ 2853{
1382 struct coro *coro; 2854 struct coro *coro;
2855 MAGIC *mg;
1383 HV *hv; 2856 HV *hv;
2857 CV *cb;
1384 int i; 2858 int i;
1385 2859
2860 if (items > 1)
2861 {
2862 cb = coro_sv_2cv (aTHX_ ST (1));
2863
2864 if (!ix)
2865 {
2866 if (CvISXSUB (cb))
2867 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2868
2869 if (!CvROOT (cb))
2870 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2871 }
2872 }
2873
1386 Newz (0, coro, 1, struct coro); 2874 Newz (0, coro, 1, struct coro);
1387 coro->args = newAV (); 2875 coro->args = newAV ();
1388 coro->save = CORO_SAVE_DEF;
1389 coro->flags = CF_NEW; 2876 coro->flags = CF_NEW;
1390 2877
1391 if (coro_first) coro_first->prev = coro; 2878 if (coro_first) coro_first->prev = coro;
1392 coro->next = coro_first; 2879 coro->next = coro_first;
1393 coro_first = coro; 2880 coro_first = coro;
1394 2881
1395 coro->hv = hv = newHV (); 2882 coro->hv = hv = newHV ();
1396 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2883 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2884 mg->mg_flags |= MGf_DUP;
1397 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2885 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1398 2886
2887 if (items > 1)
2888 {
2889 av_extend (coro->args, items - 1 + ix - 1);
2890
2891 if (ix)
2892 {
2893 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2894 cb = cv_coro_run;
2895 }
2896
2897 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2898
1399 for (i = 1; i < items; i++) 2899 for (i = 2; i < items; i++)
1400 av_push (coro->args, newSVsv (ST (i))); 2900 av_push (coro->args, newSVsv (ST (i)));
2901 }
1401} 2902}
1402 OUTPUT: 2903 OUTPUT:
1403 RETVAL 2904 RETVAL
1404 2905
1405int 2906void
1406save (SV *coro, int new_save = -1) 2907transfer (...)
2908 PROTOTYPE: $$
1407 CODE: 2909 CODE:
1408 RETVAL = api_save (coro, new_save); 2910 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1409 OUTPUT:
1410 RETVAL
1411
1412int
1413save_also (SV *coro_sv, int save_also)
1414 CODE:
1415{
1416 struct coro *coro = SvSTATE (coro_sv);
1417 RETVAL = coro->save;
1418 coro->save |= save_also;
1419}
1420 OUTPUT:
1421 RETVAL
1422
1423void
1424_set_stacklevel (...)
1425 ALIAS:
1426 Coro::State::transfer = 1
1427 Coro::schedule = 2
1428 Coro::cede = 3
1429 Coro::cede_notself = 4
1430 CODE:
1431{
1432 struct transfer_args ta;
1433
1434 switch (ix)
1435 {
1436 case 0:
1437 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1438 ta.next = 0;
1439 break;
1440
1441 case 1:
1442 if (items != 2)
1443 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1444
1445 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1446 break;
1447
1448 case 2:
1449 prepare_schedule (aTHX_ &ta);
1450 break;
1451
1452 case 3:
1453 prepare_cede (aTHX_ &ta);
1454 break;
1455
1456 case 4:
1457 if (!prepare_cede_notself (aTHX_ &ta))
1458 XSRETURN_EMPTY;
1459
1460 break;
1461 }
1462
1463 BARRIER;
1464 TRANSFER (ta);
1465
1466 if (GIMME_V != G_VOID && ta.next != ta.prev)
1467 XSRETURN_YES;
1468}
1469 2911
1470bool 2912bool
1471_destroy (SV *coro_sv) 2913_destroy (SV *coro_sv)
1472 CODE: 2914 CODE:
1473 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2915 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1474 OUTPUT: 2916 OUTPUT:
1475 RETVAL 2917 RETVAL
1476 2918
1477void 2919void
1478_exit (code) 2920_exit (int code)
1479 int code
1480 PROTOTYPE: $ 2921 PROTOTYPE: $
1481 CODE: 2922 CODE:
1482 _exit (code); 2923 _exit (code);
1483 2924
2925SV *
2926clone (Coro::State coro)
2927 CODE:
2928{
2929#if CORO_CLONE
2930 struct coro *ncoro = coro_clone (aTHX_ coro);
2931 MAGIC *mg;
2932 /* TODO: too much duplication */
2933 ncoro->hv = newHV ();
2934 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2935 mg->mg_flags |= MGf_DUP;
2936 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2937#else
2938 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2939#endif
2940}
2941 OUTPUT:
2942 RETVAL
2943
1484int 2944int
1485cctx_stacksize (int new_stacksize = 0) 2945cctx_stacksize (int new_stacksize = 0)
2946 PROTOTYPE: ;$
1486 CODE: 2947 CODE:
1487 RETVAL = coro_stacksize; 2948 RETVAL = cctx_stacksize;
1488 if (new_stacksize) 2949 if (new_stacksize)
2950 {
1489 coro_stacksize = new_stacksize; 2951 cctx_stacksize = new_stacksize;
2952 ++cctx_gen;
2953 }
1490 OUTPUT: 2954 OUTPUT:
1491 RETVAL 2955 RETVAL
1492 2956
1493int 2957int
2958cctx_max_idle (int max_idle = 0)
2959 PROTOTYPE: ;$
2960 CODE:
2961 RETVAL = cctx_max_idle;
2962 if (max_idle > 1)
2963 cctx_max_idle = max_idle;
2964 OUTPUT:
2965 RETVAL
2966
2967int
1494cctx_count () 2968cctx_count ()
2969 PROTOTYPE:
1495 CODE: 2970 CODE:
1496 RETVAL = cctx_count; 2971 RETVAL = cctx_count;
1497 OUTPUT: 2972 OUTPUT:
1498 RETVAL 2973 RETVAL
1499 2974
1500int 2975int
1501cctx_idle () 2976cctx_idle ()
2977 PROTOTYPE:
1502 CODE: 2978 CODE:
1503 RETVAL = cctx_idle; 2979 RETVAL = cctx_idle;
1504 OUTPUT: 2980 OUTPUT:
1505 RETVAL 2981 RETVAL
1506 2982
1507void 2983void
1508list () 2984list ()
2985 PROTOTYPE:
1509 PPCODE: 2986 PPCODE:
1510{ 2987{
1511 struct coro *coro; 2988 struct coro *coro;
1512 for (coro = coro_first; coro; coro = coro->next) 2989 for (coro = coro_first; coro; coro = coro->next)
1513 if (coro->hv) 2990 if (coro->hv)
… …
1518call (Coro::State coro, SV *coderef) 2995call (Coro::State coro, SV *coderef)
1519 ALIAS: 2996 ALIAS:
1520 eval = 1 2997 eval = 1
1521 CODE: 2998 CODE:
1522{ 2999{
1523 if (coro->mainstack) 3000 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1524 { 3001 {
1525 struct coro temp; 3002 struct coro temp;
1526 Zero (&temp, 1, struct coro);
1527 temp.save = CORO_SAVE_ALL;
1528 3003
1529 if (!(coro->flags & CF_RUNNING)) 3004 if (!(coro->flags & CF_RUNNING))
1530 { 3005 {
3006 PUTBACK;
1531 save_perl (aTHX_ &temp); 3007 save_perl (aTHX_ &temp);
1532 load_perl (aTHX_ coro); 3008 load_perl (aTHX_ coro);
1533 } 3009 }
1534 3010
1535 { 3011 {
1536 dSP; 3012 dSP;
1537 ENTER; 3013 ENTER;
1538 SAVETMPS; 3014 SAVETMPS;
3015 PUTBACK;
3016 PUSHSTACK;
1539 PUSHMARK (SP); 3017 PUSHMARK (SP);
1540 PUTBACK; 3018
1541 if (ix) 3019 if (ix)
1542 eval_sv (coderef, 0); 3020 eval_sv (coderef, 0);
1543 else 3021 else
1544 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3022 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3023
3024 POPSTACK;
1545 SPAGAIN; 3025 SPAGAIN;
1546 FREETMPS; 3026 FREETMPS;
1547 LEAVE; 3027 LEAVE;
1548 PUTBACK; 3028 PUTBACK;
1549 } 3029 }
1550 3030
1551 if (!(coro->flags & CF_RUNNING)) 3031 if (!(coro->flags & CF_RUNNING))
1552 { 3032 {
1553 save_perl (aTHX_ coro); 3033 save_perl (aTHX_ coro);
1554 load_perl (aTHX_ &temp); 3034 load_perl (aTHX_ &temp);
3035 SPAGAIN;
1555 } 3036 }
1556 } 3037 }
1557} 3038}
1558 3039
1559SV * 3040SV *
1560is_ready (Coro::State coro) 3041is_ready (Coro::State coro)
1561 PROTOTYPE: $ 3042 PROTOTYPE: $
1562 ALIAS: 3043 ALIAS:
1563 is_ready = CF_READY 3044 is_ready = CF_READY
… …
1568 RETVAL = boolSV (coro->flags & ix); 3049 RETVAL = boolSV (coro->flags & ix);
1569 OUTPUT: 3050 OUTPUT:
1570 RETVAL 3051 RETVAL
1571 3052
1572void 3053void
3054throw (Coro::State self, SV *throw = &PL_sv_undef)
3055 PROTOTYPE: $;$
3056 CODE:
3057{
3058 struct coro *current = SvSTATE_current;
3059 SV **throwp = self == current ? &CORO_THROW : &self->except;
3060 SvREFCNT_dec (*throwp);
3061 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3062}
3063
3064void
1573trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB) 3065api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1574 CODE: 3066 PROTOTYPE: $;$
1575 if (flags & CC_TRACE) 3067 C_ARGS: aTHX_ coro, flags
1576 {
1577 if (!coro->cctx)
1578 coro->cctx = cctx_new ();
1579 else if (!(coro->cctx->flags & CC_TRACE))
1580 croak ("cannot enable tracing on coroutine with custom stack");
1581
1582 coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
1583 }
1584 else
1585 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 {
1587 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1588 coro->cctx->flags |= CC_NOREUSE;
1589
1590 if (coro->flags & CF_RUNNING)
1591 PL_runops = RUNOPS_DEFAULT;
1592 else
1593 coro->runops = RUNOPS_DEFAULT;
1594 }
1595 3068
1596SV * 3069SV *
1597has_stack (Coro::State coro) 3070has_cctx (Coro::State coro)
1598 PROTOTYPE: $ 3071 PROTOTYPE: $
1599 CODE: 3072 CODE:
1600 RETVAL = boolSV (!!coro->cctx); 3073 /* maybe manage the running flag differently */
3074 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1601 OUTPUT: 3075 OUTPUT:
1602 RETVAL 3076 RETVAL
1603 3077
1604int 3078int
1605is_traced (Coro::State coro) 3079is_traced (Coro::State coro)
… …
1607 CODE: 3081 CODE:
1608 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3082 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1609 OUTPUT: 3083 OUTPUT:
1610 RETVAL 3084 RETVAL
1611 3085
1612IV 3086UV
1613rss (Coro::State coro) 3087rss (Coro::State coro)
1614 PROTOTYPE: $ 3088 PROTOTYPE: $
3089 ALIAS:
3090 usecount = 1
1615 CODE: 3091 CODE:
1616 RETVAL = coro_rss (coro); 3092 switch (ix)
3093 {
3094 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3095 case 1: RETVAL = coro->usecount; break;
3096 }
1617 OUTPUT: 3097 OUTPUT:
1618 RETVAL 3098 RETVAL
1619 3099
3100void
3101force_cctx ()
3102 PROTOTYPE:
3103 CODE:
3104 cctx_current->idle_sp = 0;
3105
3106void
3107swap_defsv (Coro::State self)
3108 PROTOTYPE: $
3109 ALIAS:
3110 swap_defav = 1
3111 CODE:
3112 if (!self->slot)
3113 croak ("cannot swap state with coroutine that has no saved state,");
3114 else
3115 {
3116 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3117 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3118
3119 SV *tmp = *src; *src = *dst; *dst = tmp;
3120 }
3121
1620 3122
1621MODULE = Coro::State PACKAGE = Coro 3123MODULE = Coro::State PACKAGE = Coro
1622 3124
1623BOOT: 3125BOOT:
1624{ 3126{
1625 int i; 3127 int i;
1626 3128
1627 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE); 3129 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1628 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE); 3130 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3131 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3132 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3133 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1629 av_async_pool = get_av ("Coro::async_pool", TRUE); 3134 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3135 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3136 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3137 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1630 3138
1631 coro_current = get_sv ("Coro::current", FALSE); 3139 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1632 SvREADONLY_on (coro_current); 3140 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3141 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3142 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1633 3143
1634 coro_stash = gv_stashpv ("Coro", TRUE); 3144 coro_stash = gv_stashpv ("Coro", TRUE);
1635 3145
1636 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3146 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1637 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3147 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1638 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3148 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1639 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3149 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
… …
1642 3152
1643 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3153 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1644 coro_ready[i] = newAV (); 3154 coro_ready[i] = newAV ();
1645 3155
1646 { 3156 {
1647 SV *sv = perl_get_sv("Coro::API", 1); 3157 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1648 3158
1649 coroapi.schedule = api_schedule; 3159 coroapi.schedule = api_schedule;
1650 coroapi.save = api_save; 3160 coroapi.schedule_to = api_schedule_to;
1651 coroapi.cede = api_cede; 3161 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself; 3162 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready; 3163 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready; 3164 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready; 3165 coroapi.nready = coro_nready;
1656 coroapi.current = coro_current; 3166 coroapi.current = coro_current;
1657 3167
1658 GCoroAPI = &coroapi; 3168 /*GCoroAPI = &coroapi;*/
1659 sv_setiv (sv, (IV)&coroapi); 3169 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv); 3170 SvREADONLY_on (sv);
1661 } 3171 }
1662} 3172}
3173
3174void
3175terminate (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3178
3179void
3180schedule (...)
3181 CODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3183
3184void
3185schedule_to (...)
3186 CODE:
3187 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3188
3189void
3190cede_to (...)
3191 CODE:
3192 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3193
3194void
3195cede (...)
3196 CODE:
3197 CORO_EXECUTE_SLF_XS (slf_init_cede);
3198
3199void
3200cede_notself (...)
3201 CODE:
3202 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3203
3204void
3205_cancel (Coro::State self)
3206 CODE:
3207 coro_state_destroy (aTHX_ self);
3208 coro_call_on_destroy (aTHX_ self);
1663 3209
1664void 3210void
1665_set_current (SV *current) 3211_set_current (SV *current)
1666 PROTOTYPE: $ 3212 PROTOTYPE: $
1667 CODE: 3213 CODE:
1668 SvREFCNT_dec (SvRV (coro_current)); 3214 SvREFCNT_dec (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3215 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3216
3217void
3218_set_readyhook (SV *hook)
3219 PROTOTYPE: $
3220 CODE:
3221 SvREFCNT_dec (coro_readyhook);
3222 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1670 3223
1671int 3224int
1672prio (Coro::State coro, int newprio = 0) 3225prio (Coro::State coro, int newprio = 0)
3226 PROTOTYPE: $;$
1673 ALIAS: 3227 ALIAS:
1674 nice = 1 3228 nice = 1
1675 CODE: 3229 CODE:
1676{ 3230{
1677 RETVAL = coro->prio; 3231 RETVAL = coro->prio;
… …
1692 3246
1693SV * 3247SV *
1694ready (SV *self) 3248ready (SV *self)
1695 PROTOTYPE: $ 3249 PROTOTYPE: $
1696 CODE: 3250 CODE:
1697 RETVAL = boolSV (api_ready (self)); 3251 RETVAL = boolSV (api_ready (aTHX_ self));
1698 OUTPUT: 3252 OUTPUT:
1699 RETVAL 3253 RETVAL
1700 3254
1701int 3255int
1702nready (...) 3256nready (...)
… …
1704 CODE: 3258 CODE:
1705 RETVAL = coro_nready; 3259 RETVAL = coro_nready;
1706 OUTPUT: 3260 OUTPUT:
1707 RETVAL 3261 RETVAL
1708 3262
1709# for async_pool speedup
1710void 3263void
1711_pool_1 (SV *cb) 3264_pool_handler (...)
1712 CODE: 3265 CODE:
1713{ 3266 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1714 int i, len;
1715 HV *hv = (HV *)SvRV (coro_current);
1716 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av;
1719 3267
1720 if (!invoke) 3268void
1721 croak ("\3terminate\2\n"); 3269async_pool (SV *cv, ...)
3270 PROTOTYPE: &@
3271 PPCODE:
3272{
3273 HV *hv = (HV *)av_pop (av_async_pool);
3274 AV *av = newAV ();
3275 SV *cb = ST (0);
3276 int i;
1722 3277
1723 hv_store (hv, "desc", sizeof ("desc") - 1, 3278 av_extend (av, items - 2);
1724 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3279 for (i = 1; i < items; ++i)
3280 av_push (av, SvREFCNT_inc_NN (ST (i)));
1725 3281
1726 invoke_av = (AV *)SvRV (invoke); 3282 if ((SV *)hv == &PL_sv_undef)
1727 len = av_len (invoke_av);
1728
1729 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1730
1731 if (len > 0)
1732 { 3283 {
1733 av_fill (defav, len - 1); 3284 PUSHMARK (SP);
1734 for (i = 0; i < len; ++i) 3285 EXTEND (SP, 2);
1735 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3286 PUSHs (sv_Coro);
3287 PUSHs ((SV *)cv_pool_handler);
3288 PUTBACK;
3289 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3290 SPAGAIN;
3291
3292 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1736 } 3293 }
1737 3294
3295 {
3296 struct coro *coro = SvSTATE_hv (hv);
3297
3298 assert (!coro->invoke_cb);
3299 assert (!coro->invoke_av);
3300 coro->invoke_cb = SvREFCNT_inc (cb);
3301 coro->invoke_av = av;
3302 }
3303
3304 api_ready (aTHX_ (SV *)hv);
3305
3306 if (GIMME_V != G_VOID)
3307 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3308 else
1738 SvREFCNT_dec (invoke); 3309 SvREFCNT_dec (hv);
1739} 3310}
1740 3311
1741void 3312SV *
1742_pool_2 (SV *cb) 3313rouse_cb ()
3314 PROTOTYPE:
1743 CODE: 3315 CODE:
1744{ 3316 RETVAL = coro_new_rouse_cb (aTHX);
1745 struct coro *coro = SvSTATE (coro_current);
1746
1747 sv_setsv (cb, &PL_sv_undef);
1748
1749 if (coro_rss (coro) > SvIV (sv_pool_rss)
1750 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1751 croak ("\3terminate\2\n");
1752
1753 av_clear (GvAV (PL_defgv));
1754 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1755 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1756 coro->save = CORO_SAVE_DEF;
1757 coro->prio = 0;
1758 av_push (av_async_pool, newSVsv (coro_current));
1759}
1760
1761
1762MODULE = Coro::State PACKAGE = Coro::AIO
1763
1764SV *
1765_get_state ()
1766 CODE:
1767{
1768 struct io_state *data;
1769
1770 RETVAL = newSV (sizeof (struct io_state));
1771 data = (struct io_state *)SvPVX (RETVAL);
1772 SvCUR_set (RETVAL, sizeof (struct io_state));
1773 SvPOK_only (RETVAL);
1774
1775 data->errorno = errno;
1776 data->laststype = PL_laststype;
1777 data->laststatval = PL_laststatval;
1778 data->statcache = PL_statcache;
1779}
1780 OUTPUT: 3317 OUTPUT:
1781 RETVAL 3318 RETVAL
1782 3319
1783void 3320void
1784_set_state (char *data_) 3321rouse_wait (...)
1785 PROTOTYPE: $ 3322 PROTOTYPE: ;$
3323 PPCODE:
3324 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3325
3326
3327MODULE = Coro::State PACKAGE = PerlIO::cede
3328
3329BOOT:
3330 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3331
3332
3333MODULE = Coro::State PACKAGE = Coro::Semaphore
3334
3335SV *
3336new (SV *klass, SV *count = 0)
1786 CODE: 3337 CODE:
1787{ 3338 RETVAL = sv_bless (
1788 struct io_state *data = (void *)data_; 3339 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3340 GvSTASH (CvGV (cv))
3341 );
3342 OUTPUT:
3343 RETVAL
1789 3344
1790 errno = data->errorno; 3345# helper for Coro::Channel
1791 PL_laststype = data->laststype; 3346SV *
1792 PL_laststatval = data->laststatval; 3347_alloc (int count)
1793 PL_statcache = data->statcache; 3348 CODE:
1794} 3349 RETVAL = coro_waitarray_new (aTHX_ count);
3350 OUTPUT:
3351 RETVAL
1795 3352
3353SV *
3354count (SV *self)
3355 CODE:
3356 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3357 OUTPUT:
3358 RETVAL
3359
3360void
3361up (SV *self, int adjust = 1)
3362 ALIAS:
3363 adjust = 1
3364 CODE:
3365 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3366
3367void
3368down (...)
3369 CODE:
3370 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3371
3372void
3373wait (...)
3374 CODE:
3375 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3376
3377void
3378try (SV *self)
3379 PPCODE:
3380{
3381 AV *av = (AV *)SvRV (self);
3382 SV *count_sv = AvARRAY (av)[0];
3383 IV count = SvIVX (count_sv);
3384
3385 if (count > 0)
3386 {
3387 --count;
3388 SvIVX (count_sv) = count;
3389 XSRETURN_YES;
3390 }
3391 else
3392 XSRETURN_NO;
3393}
3394
3395void
3396waiters (SV *self)
3397 PPCODE:
3398{
3399 AV *av = (AV *)SvRV (self);
3400 int wcount = AvFILLp (av) + 1 - 1;
3401
3402 if (GIMME_V == G_SCALAR)
3403 XPUSHs (sv_2mortal (newSViv (wcount)));
3404 else
3405 {
3406 int i;
3407 EXTEND (SP, wcount);
3408 for (i = 1; i <= wcount; ++i)
3409 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3410 }
3411}
3412
3413MODULE = Coro::State PACKAGE = Coro::Signal
3414
3415SV *
3416new (SV *klass)
3417 CODE:
3418 RETVAL = sv_bless (
3419 coro_waitarray_new (aTHX_ 0),
3420 GvSTASH (CvGV (cv))
3421 );
3422 OUTPUT:
3423 RETVAL
3424
3425void
3426wait (...)
3427 CODE:
3428 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3429
3430void
3431broadcast (SV *self)
3432 CODE:
3433{
3434 AV *av = (AV *)SvRV (self);
3435 coro_signal_wake (aTHX_ av, AvFILLp (av));
3436}
3437
3438void
3439send (SV *self)
3440 CODE:
3441{
3442 AV *av = (AV *)SvRV (self);
3443
3444 if (AvFILLp (av))
3445 coro_signal_wake (aTHX_ av, 1);
3446 else
3447 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3448}
3449
3450IV
3451awaited (SV *self)
3452 CODE:
3453 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3454 OUTPUT:
3455 RETVAL
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::AnyEvent
3459
3460BOOT:
3461 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3462
3463void
3464_schedule (...)
3465 CODE:
3466{
3467 static int incede;
3468
3469 api_cede_notself (aTHX);
3470
3471 ++incede;
3472 while (coro_nready >= incede && api_cede (aTHX))
3473 ;
3474
3475 sv_setsv (sv_activity, &PL_sv_undef);
3476 if (coro_nready >= incede)
3477 {
3478 PUSHMARK (SP);
3479 PUTBACK;
3480 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3481 }
3482
3483 --incede;
3484}
3485
3486
3487MODULE = Coro::State PACKAGE = Coro::AIO
3488
3489void
3490_register (char *target, char *proto, SV *req)
3491 CODE:
3492{
3493 CV *req_cv = coro_sv_2cv (aTHX_ req);
3494 /* newXSproto doesn't return the CV on 5.8 */
3495 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3496 sv_setpv ((SV *)slf_cv, proto);
3497 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3498}
3499

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