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Comparing Coro/Coro/State.xs (file contents):
Revision 1.134 by root, Thu Jan 4 23:49:27 2007 UTC vs.
Revision 1.334 by root, Fri Nov 28 23:30:55 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
9#include <stdio.h> 13#include <stdio.h>
10#include <errno.h> 14#include <errno.h>
11#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
12 25
13#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
14# include <unistd.h> 27# include <unistd.h>
15# include <sys/mman.h> 28# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
31#else 44#else
32# define PAGESIZE 0 45# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
34#endif 47#endif
35 48
36#if USE_VALGRIND 49#if CORO_USE_VALGRIND
37# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
38#endif 51#endif
39 52
40/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
42 55
43#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
48 61
49#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
50# ifndef PL_ppaddr 63# ifndef PL_ppaddr
51# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
52# endif 65# endif
… …
65# ifndef IS_PADCONST 78# ifndef IS_PADCONST
66# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
67# endif 80# endif
68#endif 81#endif
69 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
70/* 5.8.7 */ 110/* 5.8.7 */
71#ifndef SvRV_set 111#ifndef SvRV_set
72# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
73#endif 113#endif
74 114
75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76# undef STACKGUARD 116# undef CORO_STACKGUARD
77#endif 117#endif
78 118
79#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
80# define STACKGUARD 0 120# define CORO_STACKGUARD 0
81#endif 121#endif
82 122
83/* prefer perl internal functions over our own? */ 123/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS 124#ifndef CORO_PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
86#endif 126#endif
87 127
88/* The next macro should declare a variable stacklevel that contains and approximation 128/* The next macros try to return the current stack pointer, in an as
89 * to the current C stack pointer. Its property is that it changes with each call 129 * portable way as possible. */
90 * and should be unique. */ 130#if __GNUC__ >= 4
91#define dSTACKLEVEL int stacklevel 131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
92#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
93 137
94#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
95 139
96#if __GNUC__ >= 3 140#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory") 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
99#else 144#else
100# define attribute(x) 145# define attribute(x)
101# define BARRIER 146# define expect(expr,value) (expr)
147# define INLINE static
102#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
103 152
104#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
105 154
106#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
107 157
108#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
109static perl_mutex coro_mutex; 159# if CORO_PTHREAD
110# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
111# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
112#else
113# define LOCK (void)0
114# define UNLOCK (void)0
115#endif 161# endif
162#endif
116 163
117struct io_state 164static double (*nvtime)(); /* so why doesn't it take void? */
118{
119 int errorno;
120 I32 laststype;
121 int laststatval;
122 Stat_t statcache;
123};
124 165
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;
171static size_t cctx_stacksize = CORO_STACKSIZE;
125static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
126static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
127static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
128static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
129 199
130static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
131static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
132 202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
133/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
134typedef struct coro_cctx { 213typedef struct coro_cctx
214{
135 struct coro_cctx *next; 215 struct coro_cctx *next;
136 216
137 /* the stack */ 217 /* the stack */
138 void *sptr; 218 void *sptr;
139 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
140 220
141 /* cpu state */ 221 /* cpu state */
142 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
143 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 */
144 JMPENV *top_env; 224 JMPENV *top_env;
145 coro_context cctx; 225 coro_context cctx;
146 226
147 int inuse; 227 U32 gen;
148
149#if USE_VALGRIND 228#if CORO_USE_VALGRIND
150 int valgrind_id; 229 int valgrind_id;
151#endif 230#endif
231 unsigned char flags;
152} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
153 237
154enum { 238enum {
155 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
156 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
157 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
158 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
159}; 243};
160 244
161/* this is a structure representing a perl-level coroutine */ 245/* the structure where most of the perl state is stored, overlaid on the cxstack */
162struct coro { 246typedef struct
163 /* the c coroutine allocated to this perl coroutine, if any */ 247{
164 coro_cctx *cctx; 248 SV *defsv;
165 249 AV *defav;
166 /* data associated with this coroutine (initial args) */ 250 SV *errsv;
167 AV *args; 251 SV *irsgv;
168 int refcnt; 252 HV *hinthv;
169 int save; /* CORO_SAVE flags */
170 int flags; /* CF_ flags */
171
172 /* optionally saved, might be zero */
173 AV *defav; /* @_ */
174 SV *defsv; /* $_ */
175 SV *errsv; /* $@ */
176 SV *irssv; /* $/ */
177 SV *irssv_sv; /* real $/ cache */
178
179#define VAR(name,type) type name; 253#define VAR(name,type) type name;
180# include "state.h" 254# include "state.h"
181#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 */
182 279
183 /* coro process data */ 280 /* coro process data */
184 int prio; 281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
185}; 292};
186 293
187typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
188typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
189 296
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 */
301
302/** Coro ********************************************************************/
303
304#define PRIO_MAX 3
305#define PRIO_HIGH 1
306#define PRIO_NORMAL 0
307#define PRIO_LOW -1
308#define PRIO_IDLE -3
309#define PRIO_MIN -4
310
311/* for Coro.pm */
312static SV *coro_current;
313static SV *coro_readyhook;
314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
318
319/** lowlevel stuff **********************************************************/
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
190static 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 *
191coro_clone_padlist (CV *cv) 413coro_derive_padlist (pTHX_ CV *cv)
192{ 414{
193 AV *padlist = CvPADLIST (cv); 415 AV *padlist = CvPADLIST (cv);
194 AV *newpadlist, *newpad; 416 AV *newpadlist, *newpad;
195 417
196 newpadlist = newAV (); 418 newpadlist = newAV ();
197 AvREAL_off (newpadlist); 419 AvREAL_off (newpadlist);
198#if PERL_VERSION_ATLEAST (5,9,0) 420#if PERL_VERSION_ATLEAST (5,10,0)
199 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
200#else 422#else
201 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
202#endif 424#endif
203 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
204 --AvFILLp (padlist); 426 --AvFILLp (padlist);
205 427
206 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
207 av_store (newpadlist, 1, (SV *)newpad); 429 av_store (newpadlist, 1, (SV *)newpad);
208 430
209 return newpadlist; 431 return newpadlist;
210} 432}
211 433
212static void 434static void
213free_padlist (AV *padlist) 435free_padlist (pTHX_ AV *padlist)
214{ 436{
215 /* may be during global destruction */ 437 /* may be during global destruction */
216 if (SvREFCNT (padlist)) 438 if (!IN_DESTRUCT)
217 { 439 {
218 I32 i = AvFILLp (padlist); 440 I32 i = AvFILLp (padlist);
219 while (i >= 0) 441
442 while (i > 0) /* special-case index 0 */
220 { 443 {
221 SV **svp = av_fetch (padlist, i--, FALSE); 444 /* we try to be extra-careful here */
222 if (svp) 445 AV *av = (AV *)AvARRAY (padlist)[i--];
223 { 446 I32 j = AvFILLp (av);
224 SV *sv; 447
225 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
226 SvREFCNT_dec (sv); 452 SvREFCNT_dec (av);
227
228 SvREFCNT_dec (*svp);
229 }
230 } 453 }
231 454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
232 SvREFCNT_dec ((SV*)padlist); 458 SvREFCNT_dec ((SV*)padlist);
233 } 459 }
234} 460}
235 461
236static int 462static int
… …
239 AV *padlist; 465 AV *padlist;
240 AV *av = (AV *)mg->mg_obj; 466 AV *av = (AV *)mg->mg_obj;
241 467
242 /* casting is fun. */ 468 /* casting is fun. */
243 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
244 free_padlist (padlist); 470 free_padlist (aTHX_ padlist);
245 471
246 SvREFCNT_dec (av); 472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
247 473
248 return 0; 474 return 0;
249} 475}
250 476
251#define PERL_MAGIC_coro PERL_MAGIC_ext 477static MGVTBL coro_cv_vtbl = {
252 478 0, 0, 0, 0,
253static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 479 coro_cv_free
254 480};
255#define CORO_MAGIC(cv) \
256 SvMAGIC (cv) \
257 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
258 ? SvMAGIC (cv) \
259 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
260 : 0
261 481
262/* the next two functions merely cache the padlists */ 482/* the next two functions merely cache the padlists */
263static void 483static void
264get_padlist (CV *cv) 484get_padlist (pTHX_ CV *cv)
265{ 485{
266 MAGIC *mg = CORO_MAGIC (cv); 486 MAGIC *mg = CORO_MAGIC_cv (cv);
267 AV *av; 487 AV *av;
268 488
269 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
270 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
271 else 491 else
272 { 492 {
273#if PREFER_PERL_FUNCTIONS 493#if CORO_PREFER_PERL_FUNCTIONS
274 /* this is probably cleaner, but also slower? */ 494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
275 CV *cp = Perl_cv_clone (cv); 496 CV *cp = Perl_cv_clone (aTHX_ cv);
276 CvPADLIST (cv) = CvPADLIST (cp); 497 CvPADLIST (cv) = CvPADLIST (cp);
277 CvPADLIST (cp) = 0; 498 CvPADLIST (cp) = 0;
278 SvREFCNT_dec (cp); 499 SvREFCNT_dec (cp);
279#else 500#else
280 CvPADLIST (cv) = coro_clone_padlist (cv); 501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
281#endif 502#endif
282 } 503 }
283} 504}
284 505
285static void 506static void
286put_padlist (CV *cv) 507put_padlist (pTHX_ CV *cv)
287{ 508{
288 MAGIC *mg = CORO_MAGIC (cv); 509 MAGIC *mg = CORO_MAGIC_cv (cv);
289 AV *av; 510 AV *av;
290 511
291 if (!mg) 512 if (expect_false (!mg))
292 { 513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
293 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
294 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
295 mg->mg_virtual = &vtbl_coro;
296 mg->mg_obj = (SV *)newAV ();
297 }
298 514
299 av = (AV *)mg->mg_obj; 515 av = (AV *)mg->mg_obj;
300 516
301 if (AvFILLp (av) >= AvMAX (av)) 517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
302 av_extend (av, AvMAX (av) + 1); 518 av_extend (av, AvFILLp (av) + 1);
303 519
304 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
305} 521}
306 522
307#define SB do { 523/** load & save, init *******************************************************/
308#define SE } while (0)
309 524
310#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
311
312static void 525static void
313load_perl (Coro__State c) 526load_perl (pTHX_ Coro__State c)
314{ 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
315#define VAR(name,type) PL_ ## name = c->name; 539 #define VAR(name,type) PL_ ## name = slot->name;
316# include "state.h" 540 # include "state.h"
317#undef VAR 541 #undef VAR
318
319 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
320 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
321 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
322 if (c->irssv)
323 {
324 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
325 SvREFCNT_dec (c->irssv);
326 else
327 {
328 REPLACE_SV (PL_rs, c->irssv);
329 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
330 sv_setsv (c->irssv_sv, PL_rs);
331 }
332 }
333 542
334 { 543 {
335 dSP; 544 dSP;
545
336 CV *cv; 546 CV *cv;
337 547
338 /* now do the ugly restore mess */ 548 /* now do the ugly restore mess */
339 while ((cv = (CV *)POPs)) 549 while (expect_true (cv = (CV *)POPs))
340 { 550 {
341 put_padlist (cv); /* mark this padlist as available */ 551 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvDEPTH (cv) = PTR2IV (POPs); 552 CvDEPTH (cv) = PTR2IV (POPs);
343 CvPADLIST (cv) = (AV *)POPs; 553 CvPADLIST (cv) = (AV *)POPs;
344 } 554 }
345 555
346 PUTBACK; 556 PUTBACK;
347 } 557 }
348}
349 558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
561}
562
350static void 563static void
351save_perl (Coro__State c) 564save_perl (pTHX_ Coro__State c)
352{ 565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
353 { 569 {
354 dSP; 570 dSP;
355 I32 cxix = cxstack_ix; 571 I32 cxix = cxstack_ix;
356 PERL_CONTEXT *ccstk = cxstack; 572 PERL_CONTEXT *ccstk = cxstack;
357 PERL_SI *top_si = PL_curstackinfo; 573 PERL_SI *top_si = PL_curstackinfo;
… …
359 /* 575 /*
360 * the worst thing you can imagine happens first - we have to save 576 * the worst thing you can imagine happens first - we have to save
361 * (and reinitialize) all cv's in the whole callchain :( 577 * (and reinitialize) all cv's in the whole callchain :(
362 */ 578 */
363 579
364 EXTEND (SP, 3 + 1);
365 PUSHs (Nullsv); 580 XPUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 581 /* this loop was inspired by pp_caller */
367 for (;;) 582 for (;;)
368 { 583 {
369 while (cxix >= 0) 584 while (expect_true (cxix >= 0))
370 { 585 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 586 PERL_CONTEXT *cx = &ccstk[cxix--];
372 587
373 if (CxTYPE (cx) == CXt_SUB) 588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
374 { 589 {
375 CV *cv = cx->blk_sub.cv; 590 CV *cv = cx->blk_sub.cv;
376 591
377 if (CvDEPTH (cv)) 592 if (expect_true (CvDEPTH (cv)))
378 { 593 {
379 EXTEND (SP, 3); 594 EXTEND (SP, 3);
380 PUSHs ((SV *)CvPADLIST (cv)); 595 PUSHs ((SV *)CvPADLIST (cv));
381 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
382 PUSHs ((SV *)cv); 597 PUSHs ((SV *)cv);
383 598
384 CvDEPTH (cv) = 0; 599 CvDEPTH (cv) = 0;
385 get_padlist (cv); 600 get_padlist (aTHX_ cv);
386 } 601 }
387 } 602 }
388 } 603 }
389 604
390 if (top_si->si_type == PERLSI_MAIN) 605 if (expect_true (top_si->si_type == PERLSI_MAIN))
391 break; 606 break;
392 607
393 top_si = top_si->si_prev; 608 top_si = top_si->si_prev;
394 ccstk = top_si->si_cxstack; 609 ccstk = top_si->si_cxstack;
395 cxix = top_si->si_cxix; 610 cxix = top_si->si_cxix;
396 } 611 }
397 612
398 PUTBACK; 613 PUTBACK;
399 } 614 }
400 615
401 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 */
402 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 617 /* we manually unroll here, as usually 2 slots is enough */
403 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 618 if (SLOT_COUNT >= 1) CXINC;
404 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0; 619 if (SLOT_COUNT >= 2) CXINC;
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 */
405 627
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
406#define VAR(name,type)c->name = PL_ ## name; 639 #define VAR(name,type) slot->name = PL_ ## name;
407# include "state.h" 640 # include "state.h"
408#undef VAR 641 #undef VAR
642 }
409} 643}
410 644
411/* 645/*
412 * allocate various perl stacks. This is an exact copy 646 * allocate various perl stacks. This is almost an exact copy
413 * of perl.c:init_stacks, except that it uses less memory 647 * of perl.c:init_stacks, except that it uses less memory
414 * on the (sometimes correct) assumption that coroutines do 648 * on the (sometimes correct) assumption that coroutines do
415 * not usually need a lot of stackspace. 649 * not usually need a lot of stackspace.
416 */ 650 */
417#if PREFER_PERL_FUNCTIONS 651#if CORO_PREFER_PERL_FUNCTIONS
418# define coro_init_stacks init_stacks 652# define coro_init_stacks(thx) init_stacks ()
419#else 653#else
420static void 654static void
421coro_init_stacks () 655coro_init_stacks (pTHX)
422{ 656{
423 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT)); 657 PL_curstackinfo = new_stackinfo(32, 8);
424 PL_curstackinfo->si_type = PERLSI_MAIN; 658 PL_curstackinfo->si_type = PERLSI_MAIN;
425 PL_curstack = PL_curstackinfo->si_stack; 659 PL_curstack = PL_curstackinfo->si_stack;
426 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
427 661
428 PL_stack_base = AvARRAY(PL_curstack); 662 PL_stack_base = AvARRAY(PL_curstack);
429 PL_stack_sp = PL_stack_base; 663 PL_stack_sp = PL_stack_base;
430 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
431 665
432 New(50,PL_tmps_stack,128,SV*); 666 New(50,PL_tmps_stack,32,SV*);
433 PL_tmps_floor = -1; 667 PL_tmps_floor = -1;
434 PL_tmps_ix = -1; 668 PL_tmps_ix = -1;
435 PL_tmps_max = 128; 669 PL_tmps_max = 32;
436 670
437 New(54,PL_markstack,32,I32); 671 New(54,PL_markstack,16,I32);
438 PL_markstack_ptr = PL_markstack; 672 PL_markstack_ptr = PL_markstack;
439 PL_markstack_max = PL_markstack + 32; 673 PL_markstack_max = PL_markstack + 16;
440 674
441#ifdef SET_MARK_OFFSET 675#ifdef SET_MARK_OFFSET
442 SET_MARK_OFFSET; 676 SET_MARK_OFFSET;
443#endif 677#endif
444 678
445 New(54,PL_scopestack,32,I32); 679 New(54,PL_scopestack,8,I32);
446 PL_scopestack_ix = 0; 680 PL_scopestack_ix = 0;
447 PL_scopestack_max = 32; 681 PL_scopestack_max = 8;
448 682
449 New(54,PL_savestack,64,ANY); 683 New(54,PL_savestack,24,ANY);
450 PL_savestack_ix = 0; 684 PL_savestack_ix = 0;
451 PL_savestack_max = 64; 685 PL_savestack_max = 24;
452 686
453#if !PERL_VERSION_ATLEAST (5,9,0) 687#if !PERL_VERSION_ATLEAST (5,10,0)
454 New(54,PL_retstack,16,OP*); 688 New(54,PL_retstack,4,OP*);
455 PL_retstack_ix = 0; 689 PL_retstack_ix = 0;
456 PL_retstack_max = 16; 690 PL_retstack_max = 4;
457#endif 691#endif
458} 692}
459#endif 693#endif
460 694
461/* 695/*
462 * destroy the stacks, the callchain etc... 696 * destroy the stacks, the callchain etc...
463 */ 697 */
464static void 698static void
465coro_destroy_stacks () 699coro_destruct_stacks (pTHX)
466{ 700{
467 if (!IN_DESTRUCT)
468 {
469 /* restore all saved variables and stuff */
470 LEAVE_SCOPE (0);
471 assert (PL_tmps_floor == -1);
472
473 /* free all temporaries */
474 FREETMPS;
475 assert (PL_tmps_ix == -1);
476
477 /* unwind all extra stacks */
478 POPSTACK_TO (PL_mainstack);
479
480 /* unwind main stack */
481 dounwind (-1);
482 }
483
484 while (PL_curstackinfo->si_next) 701 while (PL_curstackinfo->si_next)
485 PL_curstackinfo = PL_curstackinfo->si_next; 702 PL_curstackinfo = PL_curstackinfo->si_next;
486 703
487 while (PL_curstackinfo) 704 while (PL_curstackinfo)
488 { 705 {
… …
498 715
499 Safefree (PL_tmps_stack); 716 Safefree (PL_tmps_stack);
500 Safefree (PL_markstack); 717 Safefree (PL_markstack);
501 Safefree (PL_scopestack); 718 Safefree (PL_scopestack);
502 Safefree (PL_savestack); 719 Safefree (PL_savestack);
503#if !PERL_VERSION_ATLEAST (5,9,0) 720#if !PERL_VERSION_ATLEAST (5,10,0)
504 Safefree (PL_retstack); 721 Safefree (PL_retstack);
505#endif 722#endif
506} 723}
507 724
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
734static size_t
735coro_rss (pTHX_ struct coro *coro)
736{
737 size_t rss = sizeof (*coro);
738
739 if (coro->mainstack)
740 {
741 if (coro->flags & CF_RUNNING)
742 {
743 #define SYM(sym) PL_ ## sym
744 CORO_RSS;
745 #undef SYM
746 }
747 else
748 {
749 #define SYM(sym) coro->slot->sym
750 CORO_RSS;
751 #undef SYM
752 }
753 }
754
755 return rss;
756}
757
758/** coroutine stack handling ************************************************/
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 */
508static void 780static int
509setup_coro (struct coro *coro) 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 */
872coro_setup (pTHX_ struct coro *coro)
510{ 873{
511 /* 874 /*
512 * emulate part of the perl startup here. 875 * emulate part of the perl startup here.
513 */ 876 */
514
515 coro_init_stacks (); 877 coro_init_stacks (aTHX);
516 878
879 PL_runops = RUNOPS_DEFAULT;
517 PL_curcop = &PL_compiling; 880 PL_curcop = &PL_compiling;
518 PL_in_eval = EVAL_NULL; 881 PL_in_eval = EVAL_NULL;
882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
519 PL_curpm = 0; 886 PL_curpm = 0;
887 PL_curpad = 0;
520 PL_localizing = 0; 888 PL_localizing = 0;
521 PL_dirty = 0; 889 PL_dirty = 0;
522 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);
523 907
524 { 908 {
525 dSP; 909 dSP;
526 LOGOP myop; 910 UNOP myop;
527 911
528 SvREFCNT_dec (GvAV (PL_defgv));
529 GvAV (PL_defgv) = coro->args; coro->args = 0;
530
531 Zero (&myop, 1, LOGOP); 912 Zero (&myop, 1, UNOP);
532 myop.op_next = Nullop; 913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
533 myop.op_flags = OPf_WANT_VOID; 915 myop.op_flags = OPf_WANT_VOID;
534 916
535 PUSHMARK (SP); 917 PUSHMARK (SP);
536 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE)); 918 PUSHs ((SV *)coro->startcv);
537 PUTBACK; 919 PUTBACK;
538 PL_op = (OP *)&myop; 920 PL_op = (OP *)&myop;
539 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
540 SPAGAIN;
541 } 922 }
542 923
543 ENTER; /* necessary e.g. for dounwind */ 924 /* this newly created coroutine might be run on an existing cctx which most
544} 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 */
545 929
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
546static void 942static void
943coro_destruct_perl (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
547free_coro_mortal () 982free_coro_mortal (pTHX)
548{ 983{
549 if (coro_mortal) 984 if (expect_true (coro_mortal))
550 { 985 {
551 SvREFCNT_dec (coro_mortal); 986 SvREFCNT_dec (coro_mortal);
552 coro_mortal = 0; 987 coro_mortal = 0;
553 } 988 }
554} 989}
555 990
556/* inject a fake call to Coro::State::_cctx_init into the execution */ 991static int
992runops_trace (pTHX)
993{
994 COP *oldcop = 0;
995 int oldcxix = -2;
996
997 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
998 {
999 PERL_ASYNC_CHECK ();
1000
1001 if (cctx_current->flags & CC_TRACE_ALL)
1002 {
1003 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1004 {
1005 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1006 SV **bot, **top;
1007 AV *av = newAV (); /* return values */
1008 SV **cb;
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;
1026 ENTER;
1027 SAVETMPS;
1028 EXTEND (SP, 3);
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 }
1041
1042 if (oldcop != PL_curcop)
1043 {
1044 oldcop = PL_curcop;
1045
1046 if (PL_curcop != &PL_compiling)
1047 {
1048 SV **cb;
1049
1050 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1051 {
1052 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1053
1054 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1055 {
1056 dSP;
1057 GV *gv = CvGV (cx->blk_sub.cv);
1058 SV *fullname = sv_2mortal (newSV (0));
1059
1060 if (isGV (gv))
1061 gv_efullname3 (fullname, gv, 0);
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;
1092 PUSHMARK (SP);
1093 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1094 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1095 PUTBACK;
1096 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1097 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1098 SPAGAIN;
1099 FREETMPS;
1100 LEAVE;
1101 PL_runops = runops_trace;
1102 }
1103 }
1104 }
1105 }
1106 }
1107
1108 TAINT_NOT;
1109 return 0;
1110}
1111
1112static struct CoroSLF cctx_ssl_frame;
1113
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 */
557static void NOINLINE 1129static void NOINLINE
558prepare_cctx (coro_cctx *cctx) 1130cctx_prepare (pTHX)
559{ 1131{
560 dSP;
561 LOGOP myop;
562
563 Zero (&myop, 1, LOGOP);
564 myop.op_next = PL_op;
565 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
566
567 PUSHMARK (SP);
568 EXTEND (SP, 2);
569 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
570 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
571 PUTBACK;
572 PL_op = (OP *)&myop;
573 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
574 SPAGAIN;
575}
576
577static void
578coro_run (void *arg)
579{
580 /* coro_run is the alternative tail of transfer(), so unlock here. */
581 UNLOCK;
582
583 /*
584 * this is a _very_ stripped down perl interpreter ;)
585 */
586 PL_top_env = &PL_start_env; 1132 PL_top_env = &PL_start_env;
587 1133
1134 if (cctx_current->flags & CC_TRACE)
1135 PL_runops = runops_trace;
1136
1137 /* we already must be executing an SLF op, there is no other valid way
1138 * that can lead to creation of a new cctx */
1139 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1140 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1141
1142 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1143 cctx_ssl_frame = slf_frame;
1144
1145 slf_frame.prepare = slf_prepare_set_stacklevel;
1146 slf_frame.check = slf_check_set_stacklevel;
1147}
1148
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);
1154}
1155
1156/*
1157 * this is a _very_ stripped down perl interpreter ;)
1158 */
1159static void
1160cctx_run (void *arg)
1161{
1162#ifdef USE_ITHREADS
1163# if CORO_PTHREAD
1164 PERL_SET_CONTEXT (coro_thx);
1165# endif
1166#endif
1167 {
1168 dTHX;
1169
1170 /* normally we would need to skip the entersub here */
1171 /* not doing so will re-execute it, which is exactly what we want */
1172 /* PL_nop = PL_nop->op_next */
1173
588 /* inject call to cctx_init */ 1174 /* inject a fake subroutine call to cctx_init */
589 prepare_cctx ((coro_cctx *)arg); 1175 cctx_prepare (aTHX);
590 1176
1177 /* cctx_run is the alternative tail of transfer() */
1178 transfer_tail (aTHX);
1179
591 /* somebody will hit me for both perl_run and PL_restartop */ 1180 /* somebody or something will hit me for both perl_run and PL_restartop */
592 PL_restartop = PL_op; 1181 PL_restartop = PL_op;
593 perl_run (PL_curinterp); 1182 perl_run (PL_curinterp);
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 */
594 1187
595 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1188 /*
596 abort (); 1189 * If perl-run returns we assume exit() was being called or the coro
1190 * fell off the end, which seems to be the only valid (non-bug)
1191 * reason for perl_run to return. We try to exit by jumping to the
1192 * bootstrap-time "top" top_env, as we cannot restore the "main"
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.
1196 */
1197 PL_top_env = main_top_env;
1198 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1199 }
597} 1200}
598 1201
599static coro_cctx * 1202static coro_cctx *
600cctx_new () 1203cctx_new ()
601{ 1204{
602 coro_cctx *cctx; 1205 coro_cctx *cctx;
603 1206
604 ++cctx_count; 1207 ++cctx_count;
605
606 Newz (0, cctx, 1, coro_cctx); 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 ();
1234 void *stack_start;
1235 size_t stack_size;
607 1236
608#if HAVE_MMAP 1237#if HAVE_MMAP
609
610 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1238 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
611 /* mmap supposedly does allocate-on-write for us */ 1239 /* mmap supposedly does allocate-on-write for us */
612 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);
613 1241
614 if (cctx->sptr == (void *)-1) 1242 if (cctx->sptr != (void *)-1)
1243 {
1244 #if CORO_STACKGUARD
1245 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1246 #endif
1247 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1248 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1249 cctx->flags |= CC_MAPPED;
615 { 1250 }
1251 else
1252#endif
1253 {
1254 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1255 New (0, cctx->sptr, cctx_stacksize, long);
1256
1257 if (!cctx->sptr)
1258 {
616 perror ("FATAL: unable to mmap stack for coroutine"); 1259 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
617 _exit (EXIT_FAILURE); 1260 _exit (EXIT_FAILURE);
618 } 1261 }
619 1262
620# if STACKGUARD 1263 stack_start = cctx->sptr;
621 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1264 stack_size = cctx->ssize;
622# endif
623
624#else
625
626 cctx->ssize = STACKSIZE * (long)sizeof (long);
627 New (0, cctx->sptr, STACKSIZE, long);
628
629 if (!cctx->sptr)
630 { 1265 }
631 perror ("FATAL: unable to malloc stack for coroutine");
632 _exit (EXIT_FAILURE);
633 }
634 1266
1267 #if CORO_USE_VALGRIND
1268 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
635#endif 1269 #endif
636 1270
637#if USE_VALGRIND 1271 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
638 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
639 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
640 cctx->ssize + (char *)cctx->sptr
641 );
642#endif
643
644 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
645 1272
646 return cctx; 1273 return cctx;
647} 1274}
648 1275
649static void 1276static void
650cctx_destroy (coro_cctx *cctx) 1277cctx_destroy (coro_cctx *cctx)
651{ 1278{
652 if (!cctx) 1279 if (!cctx)
653 return; 1280 return;
654 1281
1282 assert (cctx != cctx_current);//D temporary
1283
655 --cctx_count; 1284 --cctx_count;
1285 coro_destroy (&cctx->cctx);
656 1286
657#if USE_VALGRIND 1287 /* coro_transfer creates new, empty cctx's */
1288 if (cctx->sptr)
1289 {
1290 #if CORO_USE_VALGRIND
658 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1291 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
659#endif 1292 #endif
660 1293
661#if HAVE_MMAP 1294#if HAVE_MMAP
1295 if (cctx->flags & CC_MAPPED)
662 munmap (cctx->sptr, cctx->ssize); 1296 munmap (cctx->sptr, cctx->ssize);
663#else 1297 else
1298#endif
664 Safefree (cctx->sptr); 1299 Safefree (cctx->sptr);
665#endif 1300 }
666 1301
667 Safefree (cctx); 1302 Safefree (cctx);
668} 1303}
669 1304
1305/* wether this cctx should be destructed */
1306#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1307
670static coro_cctx * 1308static coro_cctx *
671cctx_get () 1309cctx_get (pTHX)
672{ 1310{
673 coro_cctx *cctx; 1311 while (expect_true (cctx_first))
674
675 if (cctx_first)
676 { 1312 {
677 cctx = cctx_first; 1313 coro_cctx *cctx = cctx_first;
678 cctx_first = cctx->next; 1314 cctx_first = cctx->next;
679 --cctx_idle; 1315 --cctx_idle;
680 } 1316
681 else 1317 if (expect_true (!CCTX_EXPIRED (cctx)))
682 { 1318 return cctx;
683 cctx = cctx_new (); 1319
684 PL_op = PL_op->op_next; 1320 cctx_destroy (cctx);
685 } 1321 }
686 1322
687 return cctx; 1323 return cctx_new_run ();
688} 1324}
689 1325
690static void 1326static void
691cctx_put (coro_cctx *cctx) 1327cctx_put (coro_cctx *cctx)
692{ 1328{
1329 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1330
693 /* free another cctx if overlimit */ 1331 /* free another cctx if overlimit */
694 if (cctx_idle >= MAX_IDLE_CCTX) 1332 if (expect_false (cctx_idle >= cctx_max_idle))
695 { 1333 {
696 coro_cctx *first = cctx_first; 1334 coro_cctx *first = cctx_first;
697 cctx_first = first->next; 1335 cctx_first = first->next;
698 --cctx_idle; 1336 --cctx_idle;
699 1337
700 assert (!first->inuse);
701 cctx_destroy (first); 1338 cctx_destroy (first);
702 } 1339 }
703 1340
704 ++cctx_idle; 1341 ++cctx_idle;
705 cctx->next = cctx_first; 1342 cctx->next = cctx_first;
706 cctx_first = cctx; 1343 cctx_first = cctx;
707} 1344}
708 1345
709/* never call directly, always through the coro_state_transfer global variable */ 1346/** coroutine switching *****************************************************/
710static void NOINLINE 1347
1348static void
711transfer (struct coro *prev, struct coro *next) 1349transfer_check (pTHX_ struct coro *prev, struct coro *next)
1350{
1351 /* TODO: throwing up here is considered harmful */
1352
1353 if (expect_true (prev != next))
1354 {
1355 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1356 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1357
1358 if (expect_false (next->flags & CF_RUNNING))
1359 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1360
1361 if (expect_false (next->flags & CF_DESTROYED))
1362 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1363
1364#if !PERL_VERSION_ATLEAST (5,10,0)
1365 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1366 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1367#endif
1368 }
1369}
1370
1371/* always use the TRANSFER macro */
1372static void NOINLINE /* noinline so we have a fixed stackframe */
1373transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
712{ 1374{
713 dSTACKLEVEL; 1375 dSTACKLEVEL;
714 1376
715 /* sometimes transfer is only called to set idle_sp */ 1377 /* sometimes transfer is only called to set idle_sp */
716 if (!next) 1378 if (expect_false (!prev))
717 { 1379 {
718 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1380 cctx_current->idle_sp = STACKLEVEL;
719 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 */
720 }
721 else if (prev != next)
722 { 1382 }
1383 else if (expect_true (prev != next))
1384 {
723 coro_cctx *prev__cctx; 1385 coro_cctx *cctx_prev;
724 1386
725 if (prev->flags & CF_NEW) 1387 if (expect_false (prev->flags & CF_NEW))
726 { 1388 {
727 /* create a new empty context */ 1389 /* create a new empty/source context */
728 Newz (0, prev->cctx, 1, coro_cctx);
729 prev->cctx->inuse = 1;
730 prev->flags &= ~CF_NEW; 1390 prev->flags &= ~CF_NEW;
731 prev->flags |= CF_RUNNING; 1391 prev->flags |= CF_RUNNING;
732 } 1392 }
733 1393
734 /*TODO: must not croak here */
735 if (!prev->flags & CF_RUNNING)
736 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
737
738 if (next->flags & CF_RUNNING)
739 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
740
741 if (next->flags & CF_DESTROYED)
742 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
743
744 prev->flags &= ~CF_RUNNING; 1394 prev->flags &= ~CF_RUNNING;
745 next->flags |= CF_RUNNING; 1395 next->flags |= CF_RUNNING;
746 1396
747 LOCK; 1397 /* first get rid of the old state */
1398 save_perl (aTHX_ prev);
748 1399
749 if (next->flags & CF_NEW) 1400 if (expect_false (next->flags & CF_NEW))
750 { 1401 {
751 /* need to start coroutine */ 1402 /* need to start coroutine */
752 next->flags &= ~CF_NEW; 1403 next->flags &= ~CF_NEW;
753 /* first get rid of the old state */
754 save_perl (prev);
755 /* setup coroutine call */ 1404 /* setup coroutine call */
756 setup_coro (next); 1405 coro_setup (aTHX_ next);
757 /* need a new stack */
758 assert (!next->cctx);
759 } 1406 }
760 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 ))
761 { 1418 {
762 /* coroutine already started */ 1419 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
763 save_perl (prev); 1420 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
764 load_perl (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);
765 } 1429 }
1430 else
1431 prev->cctx = cctx_current;
766 1432
767 prev__cctx = prev->cctx; 1433 ++next->usecount;
768 1434
769 /* possibly "free" the cctx */ 1435 cctx_prev = cctx_current;
770 if (prev__cctx->idle_sp == STACKLEVEL) 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))
771 { 1441 {
772 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1442 cctx_prev->top_env = PL_top_env;
773 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;
774 1444 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
775 prev->cctx = 0;
776
777 cctx_put (prev__cctx);
778 prev__cctx->inuse = 0;
779 } 1445 }
780 1446
781 if (!next->cctx) 1447 transfer_tail (aTHX);
782 {
783 next->cctx = cctx_get ();
784 assert (!next->cctx->inuse);
785 next->cctx->inuse = 1;
786 }
787
788 if (prev__cctx != next->cctx)
789 {
790 prev__cctx->top_env = PL_top_env;
791 PL_top_env = next->cctx->top_env;
792 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793 }
794
795 free_coro_mortal ();
796 UNLOCK;
797 } 1448 }
798} 1449}
799 1450
800struct transfer_args 1451#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
801{
802 struct coro *prev, *next;
803};
804
805#define TRANSFER(ta) transfer ((ta).prev, (ta).next) 1452#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1453
1454/** high level stuff ********************************************************/
806 1455
807static int 1456static int
808coro_state_destroy (struct coro *coro) 1457coro_state_destroy (pTHX_ struct coro *coro)
809{ 1458{
810 if (coro->flags & CF_DESTROYED) 1459 if (coro->flags & CF_DESTROYED)
811 return 0; 1460 return 0;
812 1461
1462 if (coro->on_destroy)
1463 coro->on_destroy (aTHX_ coro);
1464
813 coro->flags |= CF_DESTROYED; 1465 coro->flags |= CF_DESTROYED;
814 1466
815 if (coro->mainstack && coro->mainstack != main_mainstack) 1467 if (coro->flags & CF_READY)
1468 {
1469 /* reduce nready, as destroying a ready coro effectively unreadies it */
1470 /* alternative: look through all ready queues and remove the coro */
1471 --coro_nready;
816 { 1472 }
817 assert (!(coro->flags & CF_RUNNING)); 1473 else
1474 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818 1475
1476 if (coro->mainstack
1477 && coro->mainstack != main_mainstack
1478 && !PL_dirty)
1479 {
819 struct coro temp; 1480 struct coro temp;
820 Zero (&temp, 1, struct coro);
821 temp.save = CORO_SAVE_ALL;
822 1481
823 if (coro->flags & CF_RUNNING) 1482 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
824 croak ("FATAL: tried to destroy currently running coroutine");
825 1483
826 save_perl (&temp); 1484 save_perl (aTHX_ &temp);
827 load_perl (coro); 1485 load_perl (aTHX_ coro);
828 1486
829 coro_destroy_stacks (); 1487 coro_destruct_perl (aTHX_ coro);
830 1488
831 load_perl (&temp); /* this will get rid of defsv etc.. */ 1489 load_perl (aTHX_ &temp);
832 1490
833 coro->mainstack = 0; 1491 coro->slot = 0;
834 } 1492 }
835 1493
836 cctx_destroy (coro->cctx); 1494 cctx_destroy (coro->cctx);
1495 SvREFCNT_dec (coro->startcv);
837 SvREFCNT_dec (coro->args); 1496 SvREFCNT_dec (coro->args);
1497 SvREFCNT_dec (CORO_THROW);
1498
1499 if (coro->next) coro->next->prev = coro->prev;
1500 if (coro->prev) coro->prev->next = coro->next;
1501 if (coro == coro_first) coro_first = coro->next;
838 1502
839 return 1; 1503 return 1;
840} 1504}
841 1505
842static int 1506static int
843coro_state_free (pTHX_ SV *sv, MAGIC *mg) 1507coro_state_free (pTHX_ SV *sv, MAGIC *mg)
844{ 1508{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1509 struct coro *coro = (struct coro *)mg->mg_ptr;
846 mg->mg_ptr = 0; 1510 mg->mg_ptr = 0;
847 1511
1512 coro->hv = 0;
1513
848 if (--coro->refcnt < 0) 1514 if (--coro->refcnt < 0)
849 { 1515 {
850 coro_state_destroy (coro); 1516 coro_state_destroy (aTHX_ coro);
851 Safefree (coro); 1517 Safefree (coro);
852 } 1518 }
853 1519
854 return 0; 1520 return 0;
855} 1521}
… …
873#else 1539#else
874# define MGf_DUP 0 1540# define MGf_DUP 0
875#endif 1541#endif
876}; 1542};
877 1543
878static struct coro *
879SvSTATE (SV *coro)
880{
881 HV *stash;
882 MAGIC *mg;
883
884 if (SvROK (coro))
885 coro = SvRV (coro);
886
887 stash = SvSTASH (coro);
888 if (stash != coro_stash && stash != coro_state_stash)
889 {
890 /* very slow, but rare, check */
891 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
892 croak ("Coro::State object required");
893 }
894
895 mg = SvMAGIC (coro);
896 assert (mg->mg_type == PERL_MAGIC_ext);
897 return (struct coro *)mg->mg_ptr;
898}
899
900static void 1544static void
901prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1545prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
902{ 1546{
903 ta->prev = SvSTATE (prev_sv); 1547 ta->prev = SvSTATE (prev_sv);
904 ta->next = SvSTATE (next_sv); 1548 ta->next = SvSTATE (next_sv);
1549 TRANSFER_CHECK (*ta);
905} 1550}
906 1551
907static void 1552static void
908api_transfer (SV *prev_sv, SV *next_sv) 1553api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
909{ 1554{
910 struct transfer_args ta; 1555 struct coro_transfer_args ta;
911 1556
912 prepare_transfer (&ta, prev_sv, next_sv); 1557 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
913 TRANSFER (ta); 1558 TRANSFER (ta, 1);
1559}
1560
1561/*****************************************************************************/
1562/* gensub: simple closure generation utility */
1563
1564#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1565
1566/* create a closure from XS, returns a code reference */
1567/* the arg can be accessed via GENSUB_ARG from the callback */
1568/* the callback must use dXSARGS/XSRETURN */
1569static SV *
1570gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1571{
1572 CV *cv = (CV *)newSV (0);
1573
1574 sv_upgrade ((SV *)cv, SVt_PVCV);
1575
1576 CvANON_on (cv);
1577 CvISXSUB_on (cv);
1578 CvXSUB (cv) = xsub;
1579 GENSUB_ARG = arg;
1580
1581 return newRV_noinc ((SV *)cv);
1582}
1583
1584/** Coro ********************************************************************/
1585
1586INLINE void
1587coro_enq (pTHX_ struct coro *coro)
1588{
1589 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1590}
1591
1592INLINE SV *
1593coro_deq (pTHX)
1594{
1595 int prio;
1596
1597 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1598 if (AvFILLp (coro_ready [prio]) >= 0)
1599 return av_shift (coro_ready [prio]);
1600
1601 return 0;
914} 1602}
915 1603
916static int 1604static int
917api_save (SV *coro_sv, int new_save)
918{
919 struct coro *coro = SvSTATE (coro_sv);
920 int old_save = coro->save;
921
922 if (new_save >= 0)
923 coro->save = new_save;
924
925 return old_save;
926}
927
928/** Coro ********************************************************************/
929
930#define PRIO_MAX 3
931#define PRIO_HIGH 1
932#define PRIO_NORMAL 0
933#define PRIO_LOW -1
934#define PRIO_IDLE -3
935#define PRIO_MIN -4
936
937/* for Coro.pm */
938static SV *coro_current;
939static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
940static int coro_nready;
941
942static void
943coro_enq (SV *coro_sv)
944{
945 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
946 coro_nready++;
947}
948
949static SV *
950coro_deq (int min_prio)
951{
952 int prio = PRIO_MAX - PRIO_MIN;
953
954 min_prio -= PRIO_MIN;
955 if (min_prio < 0)
956 min_prio = 0;
957
958 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
959 if (AvFILLp (coro_ready [prio]) >= 0)
960 {
961 coro_nready--;
962 return av_shift (coro_ready [prio]);
963 }
964
965 return 0;
966}
967
968static int
969api_ready (SV *coro_sv) 1605api_ready (pTHX_ SV *coro_sv)
970{ 1606{
971 struct coro *coro; 1607 struct coro *coro;
972 1608 SV *sv_hook;
973 if (SvROK (coro_sv)) 1609 void (*xs_hook)(void);
974 coro_sv = SvRV (coro_sv);
975 1610
976 coro = SvSTATE (coro_sv); 1611 coro = SvSTATE (coro_sv);
977 1612
978 if (coro->flags & CF_READY) 1613 if (coro->flags & CF_READY)
979 return 0; 1614 return 0;
980 1615
981 coro->flags |= CF_READY; 1616 coro->flags |= CF_READY;
982 1617
983 LOCK; 1618 sv_hook = coro_nready ? 0 : coro_readyhook;
984 coro_enq (SvREFCNT_inc (coro_sv)); 1619 xs_hook = coro_nready ? 0 : coroapi.readyhook;
985 UNLOCK; 1620
1621 coro_enq (aTHX_ coro);
1622 ++coro_nready;
1623
1624 if (sv_hook)
1625 {
1626 dSP;
1627
1628 ENTER;
1629 SAVETMPS;
1630
1631 PUSHMARK (SP);
1632 PUTBACK;
1633 call_sv (sv_hook, G_VOID | G_DISCARD);
1634
1635 FREETMPS;
1636 LEAVE;
1637 }
1638
1639 if (xs_hook)
1640 xs_hook ();
986 1641
987 return 1; 1642 return 1;
988} 1643}
989 1644
990static int 1645static int
991api_is_ready (SV *coro_sv) 1646api_is_ready (pTHX_ SV *coro_sv)
992{ 1647{
993 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1648 return !!(SvSTATE (coro_sv)->flags & CF_READY);
994} 1649}
995 1650
1651/* expects to own a reference to next->hv */
1652INLINE void
1653prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1654{
1655 SV *prev_sv = SvRV (coro_current);
1656
1657 ta->prev = SvSTATE_hv (prev_sv);
1658 ta->next = next;
1659
1660 TRANSFER_CHECK (*ta);
1661
1662 SvRV_set (coro_current, (SV *)next->hv);
1663
1664 free_coro_mortal (aTHX);
1665 coro_mortal = prev_sv;
1666}
1667
996static void 1668static void
997prepare_schedule (struct transfer_args *ta) 1669prepare_schedule (pTHX_ struct coro_transfer_args *ta)
998{ 1670{
999 SV *prev_sv, *next_sv;
1000
1001 for (;;) 1671 for (;;)
1002 { 1672 {
1003 LOCK;
1004 next_sv = coro_deq (PRIO_MIN); 1673 SV *next_sv = coro_deq (aTHX);
1005 UNLOCK;
1006 1674
1675 if (expect_true (next_sv))
1676 {
1677 struct coro *next = SvSTATE_hv (next_sv);
1678
1679 /* cannot transfer to destroyed coros, skip and look for next */
1680 if (expect_false (next->flags & CF_DESTROYED))
1681 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1682 else
1683 {
1684 next->flags &= ~CF_READY;
1685 --coro_nready;
1686
1687 prepare_schedule_to (aTHX_ ta, next);
1688 break;
1689 }
1690 }
1691 else
1692 {
1007 /* nothing to schedule: call the idle handler */ 1693 /* nothing to schedule: call the idle handler */
1008 if (!next_sv) 1694 if (SvROK (sv_idle)
1695 && SvOBJECT (SvRV (sv_idle)))
1696 {
1697 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1698 api_ready (aTHX_ SvRV (sv_idle));
1699 --coro_nready;
1700 }
1701 else
1702 {
1703 dSP;
1704
1705 ENTER;
1706 SAVETMPS;
1707
1708 PUSHMARK (SP);
1709 PUTBACK;
1710 call_sv (sv_idle, G_VOID | G_DISCARD);
1711
1712 FREETMPS;
1713 LEAVE;
1714 }
1715 }
1716 }
1717}
1718
1719INLINE void
1720prepare_cede (pTHX_ struct coro_transfer_args *ta)
1721{
1722 api_ready (aTHX_ coro_current);
1723 prepare_schedule (aTHX_ ta);
1724}
1725
1726INLINE void
1727prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1728{
1729 SV *prev = SvRV (coro_current);
1730
1731 if (coro_nready)
1732 {
1733 prepare_schedule (aTHX_ ta);
1734 api_ready (aTHX_ prev);
1735 }
1736 else
1737 prepare_nop (aTHX_ ta);
1738}
1739
1740static void
1741api_schedule (pTHX)
1742{
1743 struct coro_transfer_args ta;
1744
1745 prepare_schedule (aTHX_ &ta);
1746 TRANSFER (ta, 1);
1747}
1748
1749static void
1750api_schedule_to (pTHX_ SV *coro_sv)
1751{
1752 struct coro_transfer_args ta;
1753 struct coro *next = SvSTATE (coro_sv);
1754
1755 SvREFCNT_inc_NN (coro_sv);
1756 prepare_schedule_to (aTHX_ &ta, next);
1757}
1758
1759static int
1760api_cede (pTHX)
1761{
1762 struct coro_transfer_args ta;
1763
1764 prepare_cede (aTHX_ &ta);
1765
1766 if (expect_true (ta.prev != ta.next))
1767 {
1768 TRANSFER (ta, 1);
1769 return 1;
1770 }
1771 else
1772 return 0;
1773}
1774
1775static int
1776api_cede_notself (pTHX)
1777{
1778 if (coro_nready)
1779 {
1780 struct coro_transfer_args ta;
1781
1782 prepare_cede_notself (aTHX_ &ta);
1783 TRANSFER (ta, 1);
1784 return 1;
1785 }
1786 else
1787 return 0;
1788}
1789
1790static void
1791api_trace (pTHX_ SV *coro_sv, int flags)
1792{
1793 struct coro *coro = SvSTATE (coro_sv);
1794
1795 if (coro->flags & CF_RUNNING)
1796 croak ("cannot enable tracing on a running coroutine, caught");
1797
1798 if (flags & CC_TRACE)
1799 {
1800 if (!coro->cctx)
1801 coro->cctx = cctx_new_run ();
1802 else if (!(coro->cctx->flags & CC_TRACE))
1803 croak ("cannot enable tracing on coroutine with custom stack, caught");
1804
1805 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1806 }
1807 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1808 {
1809 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1810
1811 if (coro->flags & CF_RUNNING)
1812 PL_runops = RUNOPS_DEFAULT;
1813 else
1814 coro->slot->runops = RUNOPS_DEFAULT;
1815 }
1816}
1817
1818static void
1819coro_call_on_destroy (pTHX_ struct coro *coro)
1820{
1821 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1822 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1823
1824 if (on_destroyp)
1825 {
1826 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1827
1828 while (AvFILLp (on_destroy) >= 0)
1829 {
1830 dSP; /* don't disturb outer sp */
1831 SV *cb = av_pop (on_destroy);
1832
1833 PUSHMARK (SP);
1834
1835 if (statusp)
1836 {
1837 int i;
1838 AV *status = (AV *)SvRV (*statusp);
1839 EXTEND (SP, AvFILLp (status) + 1);
1840
1841 for (i = 0; i <= AvFILLp (status); ++i)
1842 PUSHs (AvARRAY (status)[i]);
1843 }
1844
1845 PUTBACK;
1846 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1847 }
1848 }
1849}
1850
1851static void
1852slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1853{
1854 int i;
1855 HV *hv = (HV *)SvRV (coro_current);
1856 AV *av = newAV ();
1857
1858 av_extend (av, items - 1);
1859 for (i = 0; i < items; ++i)
1860 av_push (av, SvREFCNT_inc_NN (arg [i]));
1861
1862 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1863
1864 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1865 api_ready (aTHX_ sv_manager);
1866
1867 frame->prepare = prepare_schedule;
1868 frame->check = slf_check_repeat;
1869}
1870
1871/*****************************************************************************/
1872/* async pool handler */
1873
1874static int
1875slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1876{
1877 HV *hv = (HV *)SvRV (coro_current);
1878 struct coro *coro = (struct coro *)frame->data;
1879
1880 if (!coro->invoke_cb)
1881 return 1; /* loop till we have invoke */
1882 else
1883 {
1884 hv_store (hv, "desc", sizeof ("desc") - 1,
1885 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1886
1887 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1888
1889 {
1890 dSP;
1891 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1892 PUTBACK;
1893 }
1894
1895 SvREFCNT_dec (GvAV (PL_defgv));
1896 GvAV (PL_defgv) = coro->invoke_av;
1897 coro->invoke_av = 0;
1898
1899 return 0;
1900 }
1901}
1902
1903static void
1904slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1905{
1906 HV *hv = (HV *)SvRV (coro_current);
1907 struct coro *coro = SvSTATE_hv ((SV *)hv);
1908
1909 if (expect_true (coro->saved_deffh))
1910 {
1911 /* subsequent iteration */
1912 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1913 coro->saved_deffh = 0;
1914
1915 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1916 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1917 {
1918 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1919 coro->invoke_av = newAV ();
1920
1921 frame->prepare = prepare_nop;
1922 }
1923 else
1924 {
1925 av_clear (GvAV (PL_defgv));
1926 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1927
1928 coro->prio = 0;
1929
1930 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1931 api_trace (aTHX_ coro_current, 0);
1932
1933 frame->prepare = prepare_schedule;
1934 av_push (av_async_pool, SvREFCNT_inc (hv));
1935 }
1936 }
1937 else
1938 {
1939 /* first iteration, simply fall through */
1940 frame->prepare = prepare_nop;
1941 }
1942
1943 frame->check = slf_check_pool_handler;
1944 frame->data = (void *)coro;
1945}
1946
1947/*****************************************************************************/
1948/* rouse callback */
1949
1950#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1951
1952static void
1953coro_rouse_callback (pTHX_ CV *cv)
1954{
1955 dXSARGS;
1956 SV *data = (SV *)GENSUB_ARG;
1957
1958 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1959 {
1960 /* first call, set args */
1961 AV *av = newAV ();
1962 SV *coro = SvRV (data);
1963
1964 SvRV_set (data, (SV *)av);
1965 api_ready (aTHX_ coro);
1966 SvREFCNT_dec (coro);
1967
1968 /* better take a full copy of the arguments */
1969 while (items--)
1970 av_store (av, items, newSVsv (ST (items)));
1971 }
1972
1973 XSRETURN_EMPTY;
1974}
1975
1976static int
1977slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1978{
1979 SV *data = (SV *)frame->data;
1980
1981 if (CORO_THROW)
1982 return 0;
1983
1984 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1985 return 1;
1986
1987 /* now push all results on the stack */
1988 {
1989 dSP;
1990 AV *av = (AV *)SvRV (data);
1991 int i;
1992
1993 EXTEND (SP, AvFILLp (av) + 1);
1994 for (i = 0; i <= AvFILLp (av); ++i)
1995 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1996
1997 /* we have stolen the elements, so ste length to zero and free */
1998 AvFILLp (av) = -1;
1999 av_undef (av);
2000
2001 PUTBACK;
2002 }
2003
2004 return 0;
2005}
2006
2007static void
2008slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2009{
2010 SV *cb;
2011
2012 if (items)
2013 cb = arg [0];
2014 else
2015 {
2016 struct coro *coro = SvSTATE_current;
2017
2018 if (!coro->rouse_cb)
2019 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2020
2021 cb = sv_2mortal (coro->rouse_cb);
2022 coro->rouse_cb = 0;
2023 }
2024
2025 if (!SvROK (cb)
2026 || SvTYPE (SvRV (cb)) != SVt_PVCV
2027 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2028 croak ("Coro::rouse_wait called with illegal callback argument,");
2029
2030 {
2031 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2032 SV *data = (SV *)GENSUB_ARG;
2033
2034 frame->data = (void *)data;
2035 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2036 frame->check = slf_check_rouse_wait;
2037 }
2038}
2039
2040static SV *
2041coro_new_rouse_cb (pTHX)
2042{
2043 HV *hv = (HV *)SvRV (coro_current);
2044 struct coro *coro = SvSTATE_hv (hv);
2045 SV *data = newRV_inc ((SV *)hv);
2046 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2047
2048 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2049 SvREFCNT_dec (data); /* magicext increases the refcount */
2050
2051 SvREFCNT_dec (coro->rouse_cb);
2052 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2053
2054 return cb;
2055}
2056
2057/*****************************************************************************/
2058/* schedule-like-function opcode (SLF) */
2059
2060static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2061static const CV *slf_cv;
2062static SV **slf_argv;
2063static int slf_argc, slf_arga; /* count, allocated */
2064static I32 slf_ax; /* top of stack, for restore */
2065
2066/* this restores the stack in the case we patched the entersub, to */
2067/* recreate the stack frame as perl will on following calls */
2068/* since entersub cleared the stack */
2069static OP *
2070pp_restore (pTHX)
2071{
2072 int i;
2073 SV **SP = PL_stack_base + slf_ax;
2074
2075 PUSHMARK (SP);
2076
2077 EXTEND (SP, slf_argc + 1);
2078
2079 for (i = 0; i < slf_argc; ++i)
2080 PUSHs (sv_2mortal (slf_argv [i]));
2081
2082 PUSHs ((SV *)CvGV (slf_cv));
2083
2084 RETURNOP (slf_restore.op_first);
2085}
2086
2087static void
2088slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2089{
2090 SV **arg = (SV **)slf_frame.data;
2091
2092 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2093}
2094
2095static void
2096slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2097{
2098 if (items != 2)
2099 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2100
2101 frame->prepare = slf_prepare_transfer;
2102 frame->check = slf_check_nop;
2103 frame->data = (void *)arg; /* let's hope it will stay valid */
2104}
2105
2106static void
2107slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2108{
2109 frame->prepare = prepare_schedule;
2110 frame->check = slf_check_nop;
2111}
2112
2113static void
2114slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2115{
2116 struct coro *next = (struct coro *)slf_frame.data;
2117
2118 SvREFCNT_inc_NN (next->hv);
2119 prepare_schedule_to (aTHX_ ta, next);
2120}
2121
2122static void
2123slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2124{
2125 if (!items)
2126 croak ("Coro::schedule_to expects a coroutine argument, caught");
2127
2128 frame->data = (void *)SvSTATE (arg [0]);
2129 frame->prepare = slf_prepare_schedule_to;
2130 frame->check = slf_check_nop;
2131}
2132
2133static void
2134slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2135{
2136 api_ready (aTHX_ SvRV (coro_current));
2137
2138 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2139}
2140
2141static void
2142slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2143{
2144 frame->prepare = prepare_cede;
2145 frame->check = slf_check_nop;
2146}
2147
2148static void
2149slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2150{
2151 frame->prepare = prepare_cede_notself;
2152 frame->check = slf_check_nop;
2153}
2154
2155/*
2156 * these not obviously related functions are all rolled into one
2157 * function to increase chances that they all will call transfer with the same
2158 * stack offset
2159 * SLF stands for "schedule-like-function".
2160 */
2161static OP *
2162pp_slf (pTHX)
2163{
2164 I32 checkmark; /* mark SP to see how many elements check has pushed */
2165
2166 /* set up the slf frame, unless it has already been set-up */
2167 /* the latter happens when a new coro has been started */
2168 /* or when a new cctx was attached to an existing coroutine */
2169 if (expect_true (!slf_frame.prepare))
2170 {
2171 /* first iteration */
2172 dSP;
2173 SV **arg = PL_stack_base + TOPMARK + 1;
2174 int items = SP - arg; /* args without function object */
2175 SV *gv = *sp;
2176
2177 /* do a quick consistency check on the "function" object, and if it isn't */
2178 /* for us, divert to the real entersub */
2179 if (SvTYPE (gv) != SVt_PVGV
2180 || !GvCV (gv)
2181 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2182 return PL_ppaddr[OP_ENTERSUB](aTHX);
2183
2184 if (!(PL_op->op_flags & OPf_STACKED))
2185 {
2186 /* ampersand-form of call, use @_ instead of stack */
2187 AV *av = GvAV (PL_defgv);
2188 arg = AvARRAY (av);
2189 items = AvFILLp (av) + 1;
2190 }
2191
2192 /* now call the init function, which needs to set up slf_frame */
2193 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2194 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2195
2196 /* pop args */
2197 SP = PL_stack_base + POPMARK;
2198
2199 PUTBACK;
2200 }
2201
2202 /* now that we have a slf_frame, interpret it! */
2203 /* we use a callback system not to make the code needlessly */
2204 /* complicated, but so we can run multiple perl coros from one cctx */
2205
2206 do
2207 {
2208 struct coro_transfer_args ta;
2209
2210 slf_frame.prepare (aTHX_ &ta);
2211 TRANSFER (ta, 0);
2212
2213 checkmark = PL_stack_sp - PL_stack_base;
2214 }
2215 while (slf_frame.check (aTHX_ &slf_frame));
2216
2217 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2218
2219 /* exception handling */
2220 if (expect_false (CORO_THROW))
2221 {
2222 SV *exception = sv_2mortal (CORO_THROW);
2223
2224 CORO_THROW = 0;
2225 sv_setsv (ERRSV, exception);
2226 croak (0);
2227 }
2228
2229 /* return value handling - mostly like entersub */
2230 /* make sure we put something on the stack in scalar context */
2231 if (GIMME_V == G_SCALAR)
2232 {
2233 dSP;
2234 SV **bot = PL_stack_base + checkmark;
2235
2236 if (sp == bot) /* too few, push undef */
2237 bot [1] = &PL_sv_undef;
2238 else if (sp != bot + 1) /* too many, take last one */
2239 bot [1] = *sp;
2240
2241 SP = bot + 1;
2242
2243 PUTBACK;
2244 }
2245
2246 return NORMAL;
2247}
2248
2249static void
2250api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2251{
2252 int i;
2253 SV **arg = PL_stack_base + ax;
2254 int items = PL_stack_sp - arg + 1;
2255
2256 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2257
2258 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2259 && PL_op->op_ppaddr != pp_slf)
2260 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2261
2262 CvFLAGS (cv) |= CVf_SLF;
2263 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2264 slf_cv = cv;
2265
2266 /* we patch the op, and then re-run the whole call */
2267 /* we have to put the same argument on the stack for this to work */
2268 /* and this will be done by pp_restore */
2269 slf_restore.op_next = (OP *)&slf_restore;
2270 slf_restore.op_type = OP_CUSTOM;
2271 slf_restore.op_ppaddr = pp_restore;
2272 slf_restore.op_first = PL_op;
2273
2274 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2275
2276 if (PL_op->op_flags & OPf_STACKED)
2277 {
2278 if (items > slf_arga)
2279 {
2280 slf_arga = items;
2281 free (slf_argv);
2282 slf_argv = malloc (slf_arga * sizeof (SV *));
2283 }
2284
2285 slf_argc = items;
2286
2287 for (i = 0; i < items; ++i)
2288 slf_argv [i] = SvREFCNT_inc (arg [i]);
2289 }
2290 else
2291 slf_argc = 0;
2292
2293 PL_op->op_ppaddr = pp_slf;
2294 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2295
2296 PL_op = (OP *)&slf_restore;
2297}
2298
2299/*****************************************************************************/
2300/* PerlIO::cede */
2301
2302typedef struct
2303{
2304 PerlIOBuf base;
2305 NV next, every;
2306} PerlIOCede;
2307
2308static IV
2309PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2310{
2311 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2312
2313 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2314 self->next = nvtime () + self->every;
2315
2316 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2317}
2318
2319static SV *
2320PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2321{
2322 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2323
2324 return newSVnv (self->every);
2325}
2326
2327static IV
2328PerlIOCede_flush (pTHX_ PerlIO *f)
2329{
2330 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2331 double now = nvtime ();
2332
2333 if (now >= self->next)
2334 {
2335 api_cede (aTHX);
2336 self->next = now + self->every;
2337 }
2338
2339 return PerlIOBuf_flush (aTHX_ f);
2340}
2341
2342static PerlIO_funcs PerlIO_cede =
2343{
2344 sizeof(PerlIO_funcs),
2345 "cede",
2346 sizeof(PerlIOCede),
2347 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2348 PerlIOCede_pushed,
2349 PerlIOBuf_popped,
2350 PerlIOBuf_open,
2351 PerlIOBase_binmode,
2352 PerlIOCede_getarg,
2353 PerlIOBase_fileno,
2354 PerlIOBuf_dup,
2355 PerlIOBuf_read,
2356 PerlIOBuf_unread,
2357 PerlIOBuf_write,
2358 PerlIOBuf_seek,
2359 PerlIOBuf_tell,
2360 PerlIOBuf_close,
2361 PerlIOCede_flush,
2362 PerlIOBuf_fill,
2363 PerlIOBase_eof,
2364 PerlIOBase_error,
2365 PerlIOBase_clearerr,
2366 PerlIOBase_setlinebuf,
2367 PerlIOBuf_get_base,
2368 PerlIOBuf_bufsiz,
2369 PerlIOBuf_get_ptr,
2370 PerlIOBuf_get_cnt,
2371 PerlIOBuf_set_ptrcnt,
2372};
2373
2374/*****************************************************************************/
2375/* Coro::Semaphore & Coro::Signal */
2376
2377static SV *
2378coro_waitarray_new (pTHX_ int count)
2379{
2380 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2381 AV *av = newAV ();
2382 SV **ary;
2383
2384 /* unfortunately, building manually saves memory */
2385 Newx (ary, 2, SV *);
2386 AvALLOC (av) = ary;
2387#if PERL_VERSION_ATLEAST (5,10,0)
2388 AvARRAY (av) = ary;
2389#else
2390 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2391 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2392 SvPVX ((SV *)av) = (char *)ary;
2393#endif
2394 AvMAX (av) = 1;
2395 AvFILLp (av) = 0;
2396 ary [0] = newSViv (count);
2397
2398 return newRV_noinc ((SV *)av);
2399}
2400
2401/* semaphore */
2402
2403static void
2404coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2405{
2406 SV *count_sv = AvARRAY (av)[0];
2407 IV count = SvIVX (count_sv);
2408
2409 count += adjust;
2410 SvIVX (count_sv) = count;
2411
2412 /* now wake up as many waiters as are expected to lock */
2413 while (count > 0 && AvFILLp (av) > 0)
2414 {
2415 SV *cb;
2416
2417 /* swap first two elements so we can shift a waiter */
2418 AvARRAY (av)[0] = AvARRAY (av)[1];
2419 AvARRAY (av)[1] = count_sv;
2420 cb = av_shift (av);
2421
2422 if (SvOBJECT (cb))
2423 {
2424 api_ready (aTHX_ cb);
2425 --count;
2426 }
2427 else if (SvTYPE (cb) == SVt_PVCV)
1009 { 2428 {
1010 dSP; 2429 dSP;
1011
1012 ENTER;
1013 SAVETMPS;
1014
1015 PUSHMARK (SP); 2430 PUSHMARK (SP);
2431 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
1016 PUTBACK; 2432 PUTBACK;
1017 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 2433 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
1018
1019 FREETMPS;
1020 LEAVE;
1021 continue;
1022 } 2434 }
1023 2435
1024 ta->next = SvSTATE (next_sv); 2436 SvREFCNT_dec (cb);
2437 }
2438}
1025 2439
1026 /* cannot transfer to destroyed coros, skip and look for next */ 2440static void
1027 if (ta->next->flags & CF_DESTROYED) 2441coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2442{
2443 /* call $sem->adjust (0) to possibly wake up some other waiters */
2444 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2445}
2446
2447static int
2448slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2449{
2450 AV *av = (AV *)frame->data;
2451 SV *count_sv = AvARRAY (av)[0];
2452
2453 /* if we are about to throw, don't actually acquire the lock, just throw */
2454 if (CORO_THROW)
2455 return 0;
2456 else if (SvIVX (count_sv) > 0)
2457 {
2458 SvSTATE_current->on_destroy = 0;
2459
2460 if (acquire)
2461 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2462 else
2463 coro_semaphore_adjust (aTHX_ av, 0);
2464
2465 return 0;
2466 }
2467 else
2468 {
2469 int i;
2470 /* if we were woken up but can't down, we look through the whole */
2471 /* waiters list and only add us if we aren't in there already */
2472 /* this avoids some degenerate memory usage cases */
2473
2474 for (i = 1; i <= AvFILLp (av); ++i)
2475 if (AvARRAY (av)[i] == SvRV (coro_current))
2476 return 1;
2477
2478 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2479 return 1;
2480 }
2481}
2482
2483static int
2484slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2485{
2486 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2487}
2488
2489static int
2490slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2491{
2492 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2493}
2494
2495static void
2496slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2497{
2498 AV *av = (AV *)SvRV (arg [0]);
2499
2500 if (SvIVX (AvARRAY (av)[0]) > 0)
2501 {
2502 frame->data = (void *)av;
2503 frame->prepare = prepare_nop;
2504 }
2505 else
2506 {
2507 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2508
2509 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2510 frame->prepare = prepare_schedule;
2511
2512 /* to avoid race conditions when a woken-up coro gets terminated */
2513 /* we arrange for a temporary on_destroy that calls adjust (0) */
2514 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2515 }
2516}
2517
2518static void
2519slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2520{
2521 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2522 frame->check = slf_check_semaphore_down;
2523}
2524
2525static void
2526slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2527{
2528 if (items >= 2)
2529 {
2530 /* callback form */
2531 AV *av = (AV *)SvRV (arg [0]);
2532 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2533
2534 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2535
2536 if (SvIVX (AvARRAY (av)[0]) > 0)
2537 coro_semaphore_adjust (aTHX_ av, 0);
2538
2539 frame->prepare = prepare_nop;
2540 frame->check = slf_check_nop;
2541 }
2542 else
2543 {
2544 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2545 frame->check = slf_check_semaphore_wait;
2546 }
2547}
2548
2549/* signal */
2550
2551static void
2552coro_signal_wake (pTHX_ AV *av, int count)
2553{
2554 SvIVX (AvARRAY (av)[0]) = 0;
2555
2556 /* now signal count waiters */
2557 while (count > 0 && AvFILLp (av) > 0)
2558 {
2559 SV *cb;
2560
2561 /* swap first two elements so we can shift a waiter */
2562 cb = AvARRAY (av)[0];
2563 AvARRAY (av)[0] = AvARRAY (av)[1];
2564 AvARRAY (av)[1] = cb;
2565
2566 cb = av_shift (av);
2567
2568 api_ready (aTHX_ cb);
2569 sv_setiv (cb, 0); /* signal waiter */
2570 SvREFCNT_dec (cb);
2571
2572 --count;
2573 }
2574}
2575
2576static int
2577slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2578{
2579 /* if we are about to throw, also stop waiting */
2580 return SvROK ((SV *)frame->data) && !CORO_THROW;
2581}
2582
2583static void
2584slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2585{
2586 AV *av = (AV *)SvRV (arg [0]);
2587
2588 if (SvIVX (AvARRAY (av)[0]))
2589 {
2590 SvIVX (AvARRAY (av)[0]) = 0;
2591 frame->prepare = prepare_nop;
2592 frame->check = slf_check_nop;
2593 }
2594 else
2595 {
2596 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2597
2598 av_push (av, waiter);
2599
2600 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2601 frame->prepare = prepare_schedule;
2602 frame->check = slf_check_signal_wait;
2603 }
2604}
2605
2606/*****************************************************************************/
2607/* Coro::AIO */
2608
2609#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2610
2611/* helper storage struct */
2612struct io_state
2613{
2614 int errorno;
2615 I32 laststype; /* U16 in 5.10.0 */
2616 int laststatval;
2617 Stat_t statcache;
2618};
2619
2620static void
2621coro_aio_callback (pTHX_ CV *cv)
2622{
2623 dXSARGS;
2624 AV *state = (AV *)GENSUB_ARG;
2625 SV *coro = av_pop (state);
2626 SV *data_sv = newSV (sizeof (struct io_state));
2627
2628 av_extend (state, items - 1);
2629
2630 sv_upgrade (data_sv, SVt_PV);
2631 SvCUR_set (data_sv, sizeof (struct io_state));
2632 SvPOK_only (data_sv);
2633
2634 {
2635 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2636
2637 data->errorno = errno;
2638 data->laststype = PL_laststype;
2639 data->laststatval = PL_laststatval;
2640 data->statcache = PL_statcache;
2641 }
2642
2643 /* now build the result vector out of all the parameters and the data_sv */
2644 {
2645 int i;
2646
2647 for (i = 0; i < items; ++i)
2648 av_push (state, SvREFCNT_inc_NN (ST (i)));
2649 }
2650
2651 av_push (state, data_sv);
2652
2653 api_ready (aTHX_ coro);
2654 SvREFCNT_dec (coro);
2655 SvREFCNT_dec ((AV *)state);
2656}
2657
2658static int
2659slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2660{
2661 AV *state = (AV *)frame->data;
2662
2663 /* if we are about to throw, return early */
2664 /* this does not cancel the aio request, but at least */
2665 /* it quickly returns */
2666 if (CORO_THROW)
2667 return 0;
2668
2669 /* one element that is an RV? repeat! */
2670 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2671 return 1;
2672
2673 /* restore status */
2674 {
2675 SV *data_sv = av_pop (state);
2676 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2677
2678 errno = data->errorno;
2679 PL_laststype = data->laststype;
2680 PL_laststatval = data->laststatval;
2681 PL_statcache = data->statcache;
2682
2683 SvREFCNT_dec (data_sv);
2684 }
2685
2686 /* push result values */
2687 {
2688 dSP;
2689 int i;
2690
2691 EXTEND (SP, AvFILLp (state) + 1);
2692 for (i = 0; i <= AvFILLp (state); ++i)
2693 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2694
2695 PUTBACK;
2696 }
2697
2698 return 0;
2699}
2700
2701static void
2702slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2703{
2704 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2705 SV *coro_hv = SvRV (coro_current);
2706 struct coro *coro = SvSTATE_hv (coro_hv);
2707
2708 /* put our coroutine id on the state arg */
2709 av_push (state, SvREFCNT_inc_NN (coro_hv));
2710
2711 /* first see whether we have a non-zero priority and set it as AIO prio */
2712 if (coro->prio)
2713 {
2714 dSP;
2715
2716 static SV *prio_cv;
2717 static SV *prio_sv;
2718
2719 if (expect_false (!prio_cv))
1028 { 2720 {
1029 SvREFCNT_dec (next_sv); 2721 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
1030 continue; 2722 prio_sv = newSViv (0);
1031 } 2723 }
1032 2724
1033 break; 2725 PUSHMARK (SP);
1034 } 2726 sv_setiv (prio_sv, coro->prio);
2727 XPUSHs (prio_sv);
1035 2728
1036 /* free this only after the transfer */ 2729 PUTBACK;
1037 prev_sv = SvRV (coro_current); 2730 call_sv (prio_cv, G_VOID | G_DISCARD);
1038 SvRV_set (coro_current, next_sv);
1039 ta->prev = SvSTATE (prev_sv);
1040
1041 assert (ta->next->flags & CF_READY);
1042 ta->next->flags &= ~CF_READY;
1043
1044 LOCK;
1045 free_coro_mortal ();
1046 coro_mortal = prev_sv;
1047 UNLOCK;
1048}
1049
1050static void
1051prepare_cede (struct transfer_args *ta)
1052{
1053 api_ready (coro_current);
1054 prepare_schedule (ta);
1055}
1056
1057static int
1058prepare_cede_notself (struct transfer_args *ta)
1059{
1060 if (coro_nready)
1061 { 2731 }
1062 SV *prev = SvRV (coro_current); 2732
1063 prepare_schedule (ta); 2733 /* now call the original request */
1064 api_ready (prev); 2734 {
1065 return 1; 2735 dSP;
2736 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2737 int i;
2738
2739 PUSHMARK (SP);
2740
2741 /* first push all args to the stack */
2742 EXTEND (SP, items + 1);
2743
2744 for (i = 0; i < items; ++i)
2745 PUSHs (arg [i]);
2746
2747 /* now push the callback closure */
2748 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2749
2750 /* now call the AIO function - we assume our request is uncancelable */
2751 PUTBACK;
2752 call_sv ((SV *)req, G_VOID | G_DISCARD);
1066 } 2753 }
1067 else
1068 return 0;
1069}
1070 2754
1071static void 2755 /* now that the requets is going, we loop toll we have a result */
1072api_schedule (void) 2756 frame->data = (void *)state;
1073{ 2757 frame->prepare = prepare_schedule;
1074 struct transfer_args ta; 2758 frame->check = slf_check_aio_req;
1075
1076 prepare_schedule (&ta);
1077 TRANSFER (ta);
1078} 2759}
1079 2760
1080static int 2761static void
1081api_cede (void) 2762coro_aio_req_xs (pTHX_ CV *cv)
1082{ 2763{
1083 struct transfer_args ta; 2764 dXSARGS;
1084 2765
1085 prepare_cede (&ta); 2766 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1086 2767
1087 if (ta.prev != ta.next) 2768 XSRETURN_EMPTY;
1088 {
1089 TRANSFER (ta);
1090 return 1;
1091 }
1092 else
1093 return 0;
1094} 2769}
1095 2770
1096static int 2771/*****************************************************************************/
1097api_cede_notself (void)
1098{
1099 struct transfer_args ta;
1100 2772
1101 if (prepare_cede_notself (&ta)) 2773#if CORO_CLONE
1102 { 2774# include "clone.c"
1103 TRANSFER (ta); 2775#endif
1104 return 1;
1105 }
1106 else
1107 return 0;
1108}
1109 2776
1110MODULE = Coro::State PACKAGE = Coro::State 2777MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1111 2778
1112PROTOTYPES: DISABLE 2779PROTOTYPES: DISABLE
1113 2780
1114BOOT: 2781BOOT:
1115{ 2782{
1116#ifdef USE_ITHREADS 2783#ifdef USE_ITHREADS
1117 MUTEX_INIT (&coro_mutex); 2784# if CORO_PTHREAD
2785 coro_thx = PERL_GET_CONTEXT;
2786# endif
1118#endif 2787#endif
1119 BOOT_PAGESIZE; 2788 BOOT_PAGESIZE;
1120 2789
2790 cctx_current = cctx_new_empty ();
2791
2792 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2793 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2794
2795 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2796 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2797 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2798
2799 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2800 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2801 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2802
1121 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2803 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1122 2804
2805 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2806 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1123 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV)); 2807 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1124 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1125 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1126 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1127 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL)); 2808 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1128 2809
1129 main_mainstack = PL_mainstack; 2810 main_mainstack = PL_mainstack;
2811 main_top_env = PL_top_env;
1130 2812
2813 while (main_top_env->je_prev)
2814 main_top_env = main_top_env->je_prev;
2815
2816 {
2817 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2818
2819 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2820 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2821
2822 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2823 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2824 }
2825
1131 coroapi.ver = CORO_API_VERSION; 2826 coroapi.ver = CORO_API_VERSION;
2827 coroapi.rev = CORO_API_REVISION;
2828
1132 coroapi.transfer = api_transfer; 2829 coroapi.transfer = api_transfer;
2830
2831 coroapi.sv_state = SvSTATE_;
2832 coroapi.execute_slf = api_execute_slf;
2833 coroapi.prepare_nop = prepare_nop;
2834 coroapi.prepare_schedule = prepare_schedule;
2835 coroapi.prepare_cede = prepare_cede;
2836 coroapi.prepare_cede_notself = prepare_cede_notself;
2837
2838 {
2839 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2840
2841 if (!svp) croak ("Time::HiRes is required");
2842 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2843
2844 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2845 }
1133 2846
1134 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2847 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1135} 2848}
1136 2849
1137SV * 2850SV *
1138new (char *klass, ...) 2851new (char *klass, ...)
2852 ALIAS:
2853 Coro::new = 1
1139 CODE: 2854 CODE:
1140{ 2855{
1141 struct coro *coro; 2856 struct coro *coro;
2857 MAGIC *mg;
1142 HV *hv; 2858 HV *hv;
2859 CV *cb;
1143 int i; 2860 int i;
1144 2861
2862 if (items > 1)
2863 {
2864 cb = coro_sv_2cv (aTHX_ ST (1));
2865
2866 if (!ix)
2867 {
2868 if (CvISXSUB (cb))
2869 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2870
2871 if (!CvROOT (cb))
2872 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2873 }
2874 }
2875
1145 Newz (0, coro, 1, struct coro); 2876 Newz (0, coro, 1, struct coro);
1146 coro->args = newAV (); 2877 coro->args = newAV ();
1147 coro->save = CORO_SAVE_ALL;
1148 coro->flags = CF_NEW; 2878 coro->flags = CF_NEW;
1149 2879
2880 if (coro_first) coro_first->prev = coro;
2881 coro->next = coro_first;
2882 coro_first = coro;
2883
1150 hv = newHV (); 2884 coro->hv = hv = newHV ();
1151 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2885 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2886 mg->mg_flags |= MGf_DUP;
1152 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2887 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1153 2888
2889 if (items > 1)
2890 {
2891 av_extend (coro->args, items - 1 + ix - 1);
2892
2893 if (ix)
2894 {
2895 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2896 cb = cv_coro_run;
2897 }
2898
2899 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2900
1154 for (i = 1; i < items; i++) 2901 for (i = 2; i < items; i++)
1155 av_push (coro->args, newSVsv (ST (i))); 2902 av_push (coro->args, newSVsv (ST (i)));
2903 }
1156} 2904}
1157 OUTPUT: 2905 OUTPUT:
1158 RETVAL 2906 RETVAL
1159 2907
1160int 2908void
1161save (SV *coro, int new_save = -1) 2909transfer (...)
2910 PROTOTYPE: $$
1162 CODE: 2911 CODE:
1163 RETVAL = api_save (coro, new_save); 2912 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1164 OUTPUT:
1165 RETVAL
1166
1167void
1168_set_stacklevel (...)
1169 ALIAS:
1170 Coro::State::transfer = 1
1171 Coro::schedule = 2
1172 Coro::cede = 3
1173 Coro::cede_notself = 4
1174 CODE:
1175{
1176 struct transfer_args ta;
1177
1178 switch (ix)
1179 {
1180 case 0:
1181 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1182 ta.next = 0;
1183 break;
1184
1185 case 1:
1186 if (items != 2)
1187 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1188
1189 prepare_transfer (&ta, ST (0), ST (1));
1190 break;
1191
1192 case 2:
1193 prepare_schedule (&ta);
1194 break;
1195
1196 case 3:
1197 prepare_cede (&ta);
1198 break;
1199
1200 case 4:
1201 if (!prepare_cede_notself (&ta))
1202 XSRETURN_EMPTY;
1203
1204 break;
1205 }
1206
1207 BARRIER;
1208 TRANSFER (ta);
1209}
1210 2913
1211bool 2914bool
1212_destroy (SV *coro_sv) 2915_destroy (SV *coro_sv)
1213 CODE: 2916 CODE:
1214 RETVAL = coro_state_destroy (SvSTATE (coro_sv)); 2917 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1215 OUTPUT: 2918 OUTPUT:
1216 RETVAL 2919 RETVAL
1217 2920
1218void 2921void
1219_exit (code) 2922_exit (int code)
1220 int code
1221 PROTOTYPE: $ 2923 PROTOTYPE: $
1222 CODE: 2924 CODE:
1223 _exit (code); 2925 _exit (code);
1224 2926
2927SV *
2928clone (Coro::State coro)
2929 CODE:
2930{
2931#if CORO_CLONE
2932 struct coro *ncoro = coro_clone (aTHX_ coro);
2933 MAGIC *mg;
2934 /* TODO: too much duplication */
2935 ncoro->hv = newHV ();
2936 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2937 mg->mg_flags |= MGf_DUP;
2938 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2939#else
2940 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2941#endif
2942}
2943 OUTPUT:
2944 RETVAL
2945
2946int
2947cctx_stacksize (int new_stacksize = 0)
2948 PROTOTYPE: ;$
2949 CODE:
2950 RETVAL = cctx_stacksize;
2951 if (new_stacksize)
2952 {
2953 cctx_stacksize = new_stacksize;
2954 ++cctx_gen;
2955 }
2956 OUTPUT:
2957 RETVAL
2958
2959int
2960cctx_max_idle (int max_idle = 0)
2961 PROTOTYPE: ;$
2962 CODE:
2963 RETVAL = cctx_max_idle;
2964 if (max_idle > 1)
2965 cctx_max_idle = max_idle;
2966 OUTPUT:
2967 RETVAL
2968
1225int 2969int
1226cctx_count () 2970cctx_count ()
2971 PROTOTYPE:
1227 CODE: 2972 CODE:
1228 RETVAL = cctx_count; 2973 RETVAL = cctx_count;
1229 OUTPUT: 2974 OUTPUT:
1230 RETVAL 2975 RETVAL
1231 2976
1232int 2977int
1233cctx_idle () 2978cctx_idle ()
2979 PROTOTYPE:
1234 CODE: 2980 CODE:
1235 RETVAL = cctx_idle; 2981 RETVAL = cctx_idle;
1236 OUTPUT: 2982 OUTPUT:
1237 RETVAL 2983 RETVAL
1238 2984
2985void
2986list ()
2987 PROTOTYPE:
2988 PPCODE:
2989{
2990 struct coro *coro;
2991 for (coro = coro_first; coro; coro = coro->next)
2992 if (coro->hv)
2993 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2994}
2995
2996void
2997call (Coro::State coro, SV *coderef)
2998 ALIAS:
2999 eval = 1
3000 CODE:
3001{
3002 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3003 {
3004 struct coro temp;
3005
3006 if (!(coro->flags & CF_RUNNING))
3007 {
3008 PUTBACK;
3009 save_perl (aTHX_ &temp);
3010 load_perl (aTHX_ coro);
3011 }
3012
3013 {
3014 dSP;
3015 ENTER;
3016 SAVETMPS;
3017 PUTBACK;
3018 PUSHSTACK;
3019 PUSHMARK (SP);
3020
3021 if (ix)
3022 eval_sv (coderef, 0);
3023 else
3024 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3025
3026 POPSTACK;
3027 SPAGAIN;
3028 FREETMPS;
3029 LEAVE;
3030 PUTBACK;
3031 }
3032
3033 if (!(coro->flags & CF_RUNNING))
3034 {
3035 save_perl (aTHX_ coro);
3036 load_perl (aTHX_ &temp);
3037 SPAGAIN;
3038 }
3039 }
3040}
3041
3042SV *
3043is_ready (Coro::State coro)
3044 PROTOTYPE: $
3045 ALIAS:
3046 is_ready = CF_READY
3047 is_running = CF_RUNNING
3048 is_new = CF_NEW
3049 is_destroyed = CF_DESTROYED
3050 CODE:
3051 RETVAL = boolSV (coro->flags & ix);
3052 OUTPUT:
3053 RETVAL
3054
3055void
3056throw (Coro::State self, SV *throw = &PL_sv_undef)
3057 PROTOTYPE: $;$
3058 CODE:
3059{
3060 struct coro *current = SvSTATE_current;
3061 SV **throwp = self == current ? &CORO_THROW : &self->except;
3062 SvREFCNT_dec (*throwp);
3063 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3064}
3065
3066void
3067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3068 PROTOTYPE: $;$
3069 C_ARGS: aTHX_ coro, flags
3070
3071SV *
3072has_cctx (Coro::State coro)
3073 PROTOTYPE: $
3074 CODE:
3075 /* maybe manage the running flag differently */
3076 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3077 OUTPUT:
3078 RETVAL
3079
3080int
3081is_traced (Coro::State coro)
3082 PROTOTYPE: $
3083 CODE:
3084 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3085 OUTPUT:
3086 RETVAL
3087
3088UV
3089rss (Coro::State coro)
3090 PROTOTYPE: $
3091 ALIAS:
3092 usecount = 1
3093 CODE:
3094 switch (ix)
3095 {
3096 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3097 case 1: RETVAL = coro->usecount; break;
3098 }
3099 OUTPUT:
3100 RETVAL
3101
3102void
3103force_cctx ()
3104 PROTOTYPE:
3105 CODE:
3106 cctx_current->idle_sp = 0;
3107
3108void
3109swap_defsv (Coro::State self)
3110 PROTOTYPE: $
3111 ALIAS:
3112 swap_defav = 1
3113 CODE:
3114 if (!self->slot)
3115 croak ("cannot swap state with coroutine that has no saved state,");
3116 else
3117 {
3118 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3119 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3120
3121 SV *tmp = *src; *src = *dst; *dst = tmp;
3122 }
3123
3124
1239MODULE = Coro::State PACKAGE = Coro 3125MODULE = Coro::State PACKAGE = Coro
1240 3126
1241BOOT: 3127BOOT:
1242{ 3128{
1243 int i; 3129 int i;
1244 3130
3131 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3132 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3133 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3134 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3135 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3136 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3137 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3138 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3139 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3140
3141 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3142 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3143 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3144 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3145
1245 coro_stash = gv_stashpv ("Coro", TRUE); 3146 coro_stash = gv_stashpv ("Coro", TRUE);
1246 3147
1247 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3148 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1248 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3149 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1249 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3150 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1250 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3151 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1251 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3152 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1252 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3153 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1253 3154
1254 coro_current = get_sv ("Coro::current", FALSE);
1255 SvREADONLY_on (coro_current);
1256
1257 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3155 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1258 coro_ready[i] = newAV (); 3156 coro_ready[i] = newAV ();
1259 3157
1260 { 3158 {
1261 SV *sv = perl_get_sv("Coro::API", 1); 3159 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1262 3160
1263 coroapi.schedule = api_schedule; 3161 coroapi.schedule = api_schedule;
1264 coroapi.save = api_save; 3162 coroapi.schedule_to = api_schedule_to;
1265 coroapi.cede = api_cede; 3163 coroapi.cede = api_cede;
1266 coroapi.cede_notself = api_cede_notself; 3164 coroapi.cede_notself = api_cede_notself;
1267 coroapi.ready = api_ready; 3165 coroapi.ready = api_ready;
1268 coroapi.is_ready = api_is_ready; 3166 coroapi.is_ready = api_is_ready;
1269 coroapi.nready = &coro_nready; 3167 coroapi.nready = coro_nready;
1270 coroapi.current = coro_current; 3168 coroapi.current = coro_current;
1271 3169
1272 GCoroAPI = &coroapi; 3170 /*GCoroAPI = &coroapi;*/
1273 sv_setiv (sv, (IV)&coroapi); 3171 sv_setiv (sv, (IV)&coroapi);
1274 SvREADONLY_on (sv); 3172 SvREADONLY_on (sv);
1275 } 3173 }
1276} 3174}
3175
3176void
3177terminate (...)
3178 CODE:
3179 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3180
3181void
3182schedule (...)
3183 CODE:
3184 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3185
3186void
3187schedule_to (...)
3188 CODE:
3189 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3190
3191void
3192cede_to (...)
3193 CODE:
3194 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3195
3196void
3197cede (...)
3198 CODE:
3199 CORO_EXECUTE_SLF_XS (slf_init_cede);
3200
3201void
3202cede_notself (...)
3203 CODE:
3204 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3205
3206void
3207_cancel (Coro::State self)
3208 CODE:
3209 coro_state_destroy (aTHX_ self);
3210 coro_call_on_destroy (aTHX_ self);
1277 3211
1278void 3212void
1279_set_current (SV *current) 3213_set_current (SV *current)
1280 PROTOTYPE: $ 3214 PROTOTYPE: $
1281 CODE: 3215 CODE:
1282 SvREFCNT_dec (SvRV (coro_current)); 3216 SvREFCNT_dec (SvRV (coro_current));
1283 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3217 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3218
3219void
3220_set_readyhook (SV *hook)
3221 PROTOTYPE: $
3222 CODE:
3223 SvREFCNT_dec (coro_readyhook);
3224 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1284 3225
1285int 3226int
1286prio (Coro::State coro, int newprio = 0) 3227prio (Coro::State coro, int newprio = 0)
3228 PROTOTYPE: $;$
1287 ALIAS: 3229 ALIAS:
1288 nice = 1 3230 nice = 1
1289 CODE: 3231 CODE:
1290{ 3232{
1291 RETVAL = coro->prio; 3233 RETVAL = coro->prio;
… …
1306 3248
1307SV * 3249SV *
1308ready (SV *self) 3250ready (SV *self)
1309 PROTOTYPE: $ 3251 PROTOTYPE: $
1310 CODE: 3252 CODE:
1311 RETVAL = boolSV (api_ready (self)); 3253 RETVAL = boolSV (api_ready (aTHX_ self));
1312 OUTPUT:
1313 RETVAL
1314
1315SV *
1316is_ready (SV *self)
1317 PROTOTYPE: $
1318 CODE:
1319 RETVAL = boolSV (api_is_ready (self));
1320 OUTPUT: 3254 OUTPUT:
1321 RETVAL 3255 RETVAL
1322 3256
1323int 3257int
1324nready (...) 3258nready (...)
… …
1326 CODE: 3260 CODE:
1327 RETVAL = coro_nready; 3261 RETVAL = coro_nready;
1328 OUTPUT: 3262 OUTPUT:
1329 RETVAL 3263 RETVAL
1330 3264
1331MODULE = Coro::State PACKAGE = Coro::AIO 3265void
3266_pool_handler (...)
3267 CODE:
3268 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3269
3270void
3271async_pool (SV *cv, ...)
3272 PROTOTYPE: &@
3273 PPCODE:
3274{
3275 HV *hv = (HV *)av_pop (av_async_pool);
3276 AV *av = newAV ();
3277 SV *cb = ST (0);
3278 int i;
3279
3280 av_extend (av, items - 2);
3281 for (i = 1; i < items; ++i)
3282 av_push (av, SvREFCNT_inc_NN (ST (i)));
3283
3284 if ((SV *)hv == &PL_sv_undef)
3285 {
3286 PUSHMARK (SP);
3287 EXTEND (SP, 2);
3288 PUSHs (sv_Coro);
3289 PUSHs ((SV *)cv_pool_handler);
3290 PUTBACK;
3291 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3292 SPAGAIN;
3293
3294 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3295 }
3296
3297 {
3298 struct coro *coro = SvSTATE_hv (hv);
3299
3300 assert (!coro->invoke_cb);
3301 assert (!coro->invoke_av);
3302 coro->invoke_cb = SvREFCNT_inc (cb);
3303 coro->invoke_av = av;
3304 }
3305
3306 api_ready (aTHX_ (SV *)hv);
3307
3308 if (GIMME_V != G_VOID)
3309 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3310 else
3311 SvREFCNT_dec (hv);
3312}
1332 3313
1333SV * 3314SV *
1334_get_state () 3315rouse_cb ()
3316 PROTOTYPE:
1335 CODE: 3317 CODE:
1336{ 3318 RETVAL = coro_new_rouse_cb (aTHX);
1337 struct io_state *data;
1338
1339 RETVAL = newSV (sizeof (struct io_state));
1340 data = (struct io_state *)SvPVX (RETVAL);
1341 SvCUR_set (RETVAL, sizeof (struct io_state));
1342 SvPOK_only (RETVAL);
1343
1344 data->errorno = errno;
1345 data->laststype = PL_laststype;
1346 data->laststatval = PL_laststatval;
1347 data->statcache = PL_statcache;
1348}
1349 OUTPUT: 3319 OUTPUT:
1350 RETVAL 3320 RETVAL
1351 3321
1352void 3322void
1353_set_state (char *data_) 3323rouse_wait (...)
1354 PROTOTYPE: $ 3324 PROTOTYPE: ;$
3325 PPCODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3327
3328
3329MODULE = Coro::State PACKAGE = PerlIO::cede
3330
3331BOOT:
3332 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3333
3334
3335MODULE = Coro::State PACKAGE = Coro::Semaphore
3336
3337SV *
3338new (SV *klass, SV *count = 0)
1355 CODE: 3339 CODE:
1356{ 3340 RETVAL = sv_bless (
1357 struct io_state *data = (void *)data_; 3341 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3342 GvSTASH (CvGV (cv))
3343 );
3344 OUTPUT:
3345 RETVAL
1358 3346
1359 errno = data->errorno; 3347# helper for Coro::Channel
1360 PL_laststype = data->laststype; 3348SV *
1361 PL_laststatval = data->laststatval; 3349_alloc (int count)
1362 PL_statcache = data->statcache; 3350 CODE:
1363} 3351 RETVAL = coro_waitarray_new (aTHX_ count);
3352 OUTPUT:
3353 RETVAL
1364 3354
3355SV *
3356count (SV *self)
3357 CODE:
3358 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3359 OUTPUT:
3360 RETVAL
3361
3362void
3363up (SV *self, int adjust = 1)
3364 ALIAS:
3365 adjust = 1
3366 CODE:
3367 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3368
3369void
3370down (...)
3371 CODE:
3372 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3373
3374void
3375wait (...)
3376 CODE:
3377 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3378
3379void
3380try (SV *self)
3381 PPCODE:
3382{
3383 AV *av = (AV *)SvRV (self);
3384 SV *count_sv = AvARRAY (av)[0];
3385 IV count = SvIVX (count_sv);
3386
3387 if (count > 0)
3388 {
3389 --count;
3390 SvIVX (count_sv) = count;
3391 XSRETURN_YES;
3392 }
3393 else
3394 XSRETURN_NO;
3395}
3396
3397void
3398waiters (SV *self)
3399 PPCODE:
3400{
3401 AV *av = (AV *)SvRV (self);
3402 int wcount = AvFILLp (av) + 1 - 1;
3403
3404 if (GIMME_V == G_SCALAR)
3405 XPUSHs (sv_2mortal (newSViv (wcount)));
3406 else
3407 {
3408 int i;
3409 EXTEND (SP, wcount);
3410 for (i = 1; i <= wcount; ++i)
3411 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3412 }
3413}
3414
3415MODULE = Coro::State PACKAGE = Coro::Signal
3416
3417SV *
3418new (SV *klass)
3419 CODE:
3420 RETVAL = sv_bless (
3421 coro_waitarray_new (aTHX_ 0),
3422 GvSTASH (CvGV (cv))
3423 );
3424 OUTPUT:
3425 RETVAL
3426
3427void
3428wait (...)
3429 CODE:
3430 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3431
3432void
3433broadcast (SV *self)
3434 CODE:
3435{
3436 AV *av = (AV *)SvRV (self);
3437 coro_signal_wake (aTHX_ av, AvFILLp (av));
3438}
3439
3440void
3441send (SV *self)
3442 CODE:
3443{
3444 AV *av = (AV *)SvRV (self);
3445
3446 if (AvFILLp (av))
3447 coro_signal_wake (aTHX_ av, 1);
3448 else
3449 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3450}
3451
3452IV
3453awaited (SV *self)
3454 CODE:
3455 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3456 OUTPUT:
3457 RETVAL
3458
3459
3460MODULE = Coro::State PACKAGE = Coro::AnyEvent
3461
3462BOOT:
3463 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3464
3465void
3466_schedule (...)
3467 CODE:
3468{
3469 static int incede;
3470
3471 api_cede_notself (aTHX);
3472
3473 ++incede;
3474 while (coro_nready >= incede && api_cede (aTHX))
3475 ;
3476
3477 sv_setsv (sv_activity, &PL_sv_undef);
3478 if (coro_nready >= incede)
3479 {
3480 PUSHMARK (SP);
3481 PUTBACK;
3482 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3483 }
3484
3485 --incede;
3486}
3487
3488
3489MODULE = Coro::State PACKAGE = Coro::AIO
3490
3491void
3492_register (char *target, char *proto, SV *req)
3493 CODE:
3494{
3495 CV *req_cv = coro_sv_2cv (aTHX_ req);
3496 /* newXSproto doesn't return the CV on 5.8 */
3497 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3498 sv_setpv ((SV *)slf_cv, proto);
3499 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3500}
3501

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