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Comparing Coro/Coro/State.xs (file contents):
Revision 1.212 by root, Wed Oct 10 04:21:33 2007 UTC vs.
Revision 1.343 by root, Mon Dec 15 16:41:43 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#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
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49 55
50#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
55 61
56#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr 63# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
59# endif 65# endif
… …
72# ifndef IS_PADCONST 78# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
74# endif 80# endif
75#endif 81#endif
76 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
77/* 5.8.7 */ 110/* 5.8.7 */
78#ifndef SvRV_set 111#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v) 112# define SvRV_set(s,v) SvRV(s) = (v)
80#endif 113#endif
81 114
82/* 5.8.8 */
83#ifndef GV_NOTQUAL
84# define GV_NOTQUAL 0
85#endif
86#ifndef newSV
87# define newSV(l) NEWSV(0,l)
88#endif
89
90#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 116# undef CORO_STACKGUARD
92#endif 117#endif
93 118
94#ifndef CORO_STACKGUARD 119#ifndef CORO_STACKGUARD
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 125# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 126#endif
102 127
103/* The next macros try to return the current stack pointer, in an as 128/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
105#define dSTACKLEVEL volatile char stacklevel 134# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
107 137
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT PL_dirty
109 139
110#if __GNUC__ >= 3 140#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
114#else 144#else
115# define attribute(x) 145# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 146# define expect(expr,value) (expr)
147# define INLINE static
118#endif 148#endif
119 149
120#define expect_false(expr) expect ((expr) != 0, 0) 150#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 151#define expect_true(expr) expect ((expr) != 0, 1)
122 152
123#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
124 154
125#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
126 157
127#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 159# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
130# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
131#else
132# define LOCK (void)0
133# define UNLOCK (void)0
134#endif 161# endif
162#endif
135 163
136/* helper storage struct for Coro::AIO */ 164static double (*nvtime)(); /* so why doesn't it take void? */
137struct io_state
138{
139 int errorno;
140 I32 laststype;
141 int laststatval;
142 Stat_t statcache;
143};
144 165
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;
145static size_t coro_stacksize = CORO_STACKSIZE; 171static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 174static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
150static 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 */
151 181
152static GV *irsgv; /* $/ */ 182static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 183static GV *stdoutgv; /* *STDOUT */
154 184static SV *rv_diehook;
185static SV *rv_warnhook;
155static HV *hv_sig; /* %SIG */ 186static HV *hv_sig; /* %SIG */
156static SV *sv_diehook;
157static SV *sv_warnhook;
158 187
159/* async_pool helper stuff */ 188/* async_pool helper stuff */
160static SV *sv_pool_rss; 189static SV *sv_pool_rss;
161static SV *sv_pool_size; 190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
162static AV *av_async_pool; 192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
163 199
164static struct coro_cctx *cctx_first; 200static struct coro_cctx *cctx_first;
165static int cctx_count, cctx_idle; 201static int cctx_count, cctx_idle;
166 202
167enum { 203enum {
… …
172 CC_TRACE_LINE = 0x10, /* trace each statement */ 208 CC_TRACE_LINE = 0x10, /* trace each statement */
173 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
174}; 210};
175 211
176/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
177typedef struct coro_cctx { 213typedef struct coro_cctx
214{
178 struct coro_cctx *next; 215 struct coro_cctx *next;
179 216
180 /* the stack */ 217 /* the stack */
181 void *sptr; 218 void *sptr;
182 size_t ssize; 219 size_t ssize;
… …
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 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 */
187 JMPENV *top_env; 224 JMPENV *top_env;
188 coro_context cctx; 225 coro_context cctx;
189 226
227 U32 gen;
190#if CORO_USE_VALGRIND 228#if CORO_USE_VALGRIND
191 int valgrind_id; 229 int valgrind_id;
192#endif 230#endif
193 unsigned char flags; 231 unsigned char flags;
194} coro_cctx; 232} coro_cctx;
233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
195 237
196enum { 238enum {
197 CF_RUNNING = 0x0001, /* coroutine is running */ 239 CF_RUNNING = 0x0001, /* coroutine is running */
198 CF_READY = 0x0002, /* coroutine is ready */ 240 CF_READY = 0x0002, /* coroutine is ready */
199 CF_NEW = 0x0004, /* has never been switched to */ 241 CF_NEW = 0x0004, /* has never been switched to */
200 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
201}; 244};
202 245
203/* the structure where most of the perl state is stored, overlaid on the cxstack */ 246/* the structure where most of the perl state is stored, overlaid on the cxstack */
204typedef struct { 247typedef struct
248{
205 SV *defsv; 249 SV *defsv;
206 AV *defav; 250 AV *defav;
207 SV *errsv; 251 SV *errsv;
208 SV *irsgv; 252 SV *irsgv;
253 HV *hinthv;
209#define VAR(name,type) type name; 254#define VAR(name,type) type name;
210# include "state.h" 255# include "state.h"
211#undef VAR 256#undef VAR
212} perl_slots; 257} perl_slots;
213 258
214#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 259#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
215 260
216/* this is a structure representing a perl-level coroutine */ 261/* this is a structure representing a perl-level coroutine */
217struct coro { 262struct coro {
218 /* the c coroutine allocated to this perl coroutine, if any */ 263 /* the C coroutine allocated to this perl coroutine, if any */
219 coro_cctx *cctx; 264 coro_cctx *cctx;
220 265
221 /* process data */ 266 /* state data */
267 struct CoroSLF slf_frame; /* saved slf frame */
222 AV *mainstack; 268 AV *mainstack;
223 perl_slots *slot; /* basically the saved sp */ 269 perl_slots *slot; /* basically the saved sp */
224 270
271 CV *startcv; /* the CV to execute */
225 AV *args; /* data associated with this coroutine (initial args) */ 272 AV *args; /* data associated with this coroutine (initial args) */
226 int refcnt; /* coroutines are refcounted, yes */ 273 int refcnt; /* coroutines are refcounted, yes */
227 int flags; /* CF_ flags */ 274 int flags; /* CF_ flags */
228 HV *hv; /* the perl hash associated with this coro, if any */ 275 HV *hv; /* the perl hash associated with this coro, if any */
276 void (*on_destroy)(pTHX_ struct coro *coro);
229 277
230 /* statistics */ 278 /* statistics */
231 int usecount; /* number of transfers to this coro */ 279 int usecount; /* number of transfers to this coro */
232 280
233 /* coro process data */ 281 /* coro process data */
234 int prio; 282 int prio;
235 SV *throw; /* exception to be thrown */ 283 SV *except; /* exception to be thrown */
284 SV *rouse_cb;
236 285
237 /* async_pool */ 286 /* async_pool */
238 SV *saved_deffh; 287 SV *saved_deffh;
288 SV *invoke_cb;
289 AV *invoke_av;
290
291 /* on_enter/on_leave */
292 AV *on_enter;
293 AV *on_leave;
239 294
240 /* linked list */ 295 /* linked list */
241 struct coro *next, *prev; 296 struct coro *next, *prev;
242}; 297};
243 298
244typedef struct coro *Coro__State; 299typedef struct coro *Coro__State;
245typedef struct coro *Coro__State_or_hashref; 300typedef struct coro *Coro__State_or_hashref;
301
302/* the following variables are effectively part of the perl context */
303/* and get copied between struct coro and these variables */
304/* the mainr easonw e don't support windows process emulation */
305static struct CoroSLF slf_frame; /* the current slf frame */
246 306
247/** Coro ********************************************************************/ 307/** Coro ********************************************************************/
248 308
249#define PRIO_MAX 3 309#define PRIO_MAX 3
250#define PRIO_HIGH 1 310#define PRIO_HIGH 1
… …
253#define PRIO_IDLE -3 313#define PRIO_IDLE -3
254#define PRIO_MIN -4 314#define PRIO_MIN -4
255 315
256/* for Coro.pm */ 316/* for Coro.pm */
257static SV *coro_current; 317static SV *coro_current;
318static SV *coro_readyhook;
258static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 319static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
259static int coro_nready; 320static CV *cv_coro_run, *cv_coro_terminate;
260static struct coro *coro_first; 321static struct coro *coro_first;
322#define coro_nready coroapi.nready
261 323
262/** lowlevel stuff **********************************************************/ 324/** lowlevel stuff **********************************************************/
263 325
264static SV * 326static SV *
265coro_get_sv (const char *name, int create) 327coro_get_sv (pTHX_ const char *name, int create)
266{ 328{
267#if PERL_VERSION_ATLEAST (5,9,0) 329#if PERL_VERSION_ATLEAST (5,10,0)
268 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
269 get_sv (name, create); 331 get_sv (name, create);
270#endif 332#endif
271 return get_sv (name, create); 333 return get_sv (name, create);
272} 334}
273 335
274static AV * 336static AV *
275coro_get_av (const char *name, int create) 337coro_get_av (pTHX_ const char *name, int create)
276{ 338{
277#if PERL_VERSION_ATLEAST (5,9,0) 339#if PERL_VERSION_ATLEAST (5,10,0)
278 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 340 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
279 get_av (name, create); 341 get_av (name, create);
280#endif 342#endif
281 return get_av (name, create); 343 return get_av (name, create);
282} 344}
283 345
284static HV * 346static HV *
285coro_get_hv (const char *name, int create) 347coro_get_hv (pTHX_ const char *name, int create)
286{ 348{
287#if PERL_VERSION_ATLEAST (5,9,0) 349#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 350 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_hv (name, create); 351 get_hv (name, create);
290#endif 352#endif
291 return get_hv (name, create); 353 return get_hv (name, create);
292} 354}
293 355
356/* may croak */
357INLINE CV *
358coro_sv_2cv (pTHX_ SV *sv)
359{
360 HV *st;
361 GV *gvp;
362 CV *cv = sv_2cv (sv, &st, &gvp, 0);
363
364 if (!cv)
365 croak ("code reference expected");
366
367 return cv;
368}
369
370/*****************************************************************************/
371/* magic glue */
372
373#define CORO_MAGIC_type_cv 26
374#define CORO_MAGIC_type_state PERL_MAGIC_ext
375
376#define CORO_MAGIC_NN(sv, type) \
377 (expect_true (SvMAGIC (sv)->mg_type == type) \
378 ? SvMAGIC (sv) \
379 : mg_find (sv, type))
380
381#define CORO_MAGIC(sv, type) \
382 (expect_true (SvMAGIC (sv)) \
383 ? CORO_MAGIC_NN (sv, type) \
384 : 0)
385
386#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
388
389INLINE struct coro *
390SvSTATE_ (pTHX_ SV *coro)
391{
392 HV *stash;
393 MAGIC *mg;
394
395 if (SvROK (coro))
396 coro = SvRV (coro);
397
398 if (expect_false (SvTYPE (coro) != SVt_PVHV))
399 croak ("Coro::State object required");
400
401 stash = SvSTASH (coro);
402 if (expect_false (stash != coro_stash && stash != coro_state_stash))
403 {
404 /* very slow, but rare, check */
405 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
406 croak ("Coro::State object required");
407 }
408
409 mg = CORO_MAGIC_state (coro);
410 return (struct coro *)mg->mg_ptr;
411}
412
413#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
414
415/* faster than SvSTATE, but expects a coroutine hv */
416#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
417#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
418
419/*****************************************************************************/
420/* padlist management and caching */
421
294static AV * 422static AV *
295coro_clone_padlist (pTHX_ CV *cv) 423coro_derive_padlist (pTHX_ CV *cv)
296{ 424{
297 AV *padlist = CvPADLIST (cv); 425 AV *padlist = CvPADLIST (cv);
298 AV *newpadlist, *newpad; 426 AV *newpadlist, *newpad;
299 427
300 newpadlist = newAV (); 428 newpadlist = newAV ();
301 AvREAL_off (newpadlist); 429 AvREAL_off (newpadlist);
302#if PERL_VERSION_ATLEAST (5,9,0) 430#if PERL_VERSION_ATLEAST (5,10,0)
303 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 431 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
304#else 432#else
305 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 433 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
306#endif 434#endif
307 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 435 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
308 --AvFILLp (padlist); 436 --AvFILLp (padlist);
309 437
310 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 438 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
311 av_store (newpadlist, 1, (SV *)newpad); 439 av_store (newpadlist, 1, (SV *)newpad);
312 440
313 return newpadlist; 441 return newpadlist;
314} 442}
315 443
316static void 444static void
317free_padlist (pTHX_ AV *padlist) 445free_padlist (pTHX_ AV *padlist)
318{ 446{
319 /* may be during global destruction */ 447 /* may be during global destruction */
320 if (SvREFCNT (padlist)) 448 if (!IN_DESTRUCT)
321 { 449 {
322 I32 i = AvFILLp (padlist); 450 I32 i = AvFILLp (padlist);
323 while (i >= 0) 451
452 while (i > 0) /* special-case index 0 */
324 { 453 {
325 SV **svp = av_fetch (padlist, i--, FALSE); 454 /* we try to be extra-careful here */
326 if (svp) 455 AV *av = (AV *)AvARRAY (padlist)[i--];
327 { 456 I32 j = AvFILLp (av);
328 SV *sv; 457
329 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 458 while (j >= 0)
459 SvREFCNT_dec (AvARRAY (av)[j--]);
460
461 AvFILLp (av) = -1;
330 SvREFCNT_dec (sv); 462 SvREFCNT_dec (av);
331
332 SvREFCNT_dec (*svp);
333 }
334 } 463 }
335 464
465 SvREFCNT_dec (AvARRAY (padlist)[0]);
466
467 AvFILLp (padlist) = -1;
336 SvREFCNT_dec ((SV*)padlist); 468 SvREFCNT_dec ((SV*)padlist);
337 } 469 }
338} 470}
339 471
340static int 472static int
… …
345 477
346 /* casting is fun. */ 478 /* casting is fun. */
347 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 479 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
348 free_padlist (aTHX_ padlist); 480 free_padlist (aTHX_ padlist);
349 481
350 SvREFCNT_dec (av); 482 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
351 483
352 return 0; 484 return 0;
353} 485}
354 486
355#define PERL_MAGIC_coro PERL_MAGIC_ext 487static MGVTBL coro_cv_vtbl = {
356 488 0, 0, 0, 0,
357static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 489 coro_cv_free
358 490};
359#define CORO_MAGIC(cv) \
360 SvMAGIC (cv) \
361 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
362 ? SvMAGIC (cv) \
363 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
364 : 0
365
366static struct coro *
367SvSTATE_ (pTHX_ SV *coro)
368{
369 HV *stash;
370 MAGIC *mg;
371
372 if (SvROK (coro))
373 coro = SvRV (coro);
374
375 if (expect_false (SvTYPE (coro) != SVt_PVHV))
376 croak ("Coro::State object required");
377
378 stash = SvSTASH (coro);
379 if (expect_false (stash != coro_stash && stash != coro_state_stash))
380 {
381 /* very slow, but rare, check */
382 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
383 croak ("Coro::State object required");
384 }
385
386 mg = CORO_MAGIC (coro);
387 return (struct coro *)mg->mg_ptr;
388}
389
390#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
391 491
392/* the next two functions merely cache the padlists */ 492/* the next two functions merely cache the padlists */
393static void 493static void
394get_padlist (pTHX_ CV *cv) 494get_padlist (pTHX_ CV *cv)
395{ 495{
396 MAGIC *mg = CORO_MAGIC (cv); 496 MAGIC *mg = CORO_MAGIC_cv (cv);
397 AV *av; 497 AV *av;
398 498
399 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 499 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
400 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 500 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
401 else 501 else
402 { 502 {
403#if CORO_PREFER_PERL_FUNCTIONS 503#if CORO_PREFER_PERL_FUNCTIONS
404 /* this is probably cleaner, but also slower? */ 504 /* this is probably cleaner? but also slower! */
505 /* in practise, it seems to be less stable */
405 CV *cp = Perl_cv_clone (cv); 506 CV *cp = Perl_cv_clone (aTHX_ cv);
406 CvPADLIST (cv) = CvPADLIST (cp); 507 CvPADLIST (cv) = CvPADLIST (cp);
407 CvPADLIST (cp) = 0; 508 CvPADLIST (cp) = 0;
408 SvREFCNT_dec (cp); 509 SvREFCNT_dec (cp);
409#else 510#else
410 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 511 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
411#endif 512#endif
412 } 513 }
413} 514}
414 515
415static void 516static void
416put_padlist (pTHX_ CV *cv) 517put_padlist (pTHX_ CV *cv)
417{ 518{
418 MAGIC *mg = CORO_MAGIC (cv); 519 MAGIC *mg = CORO_MAGIC_cv (cv);
419 AV *av; 520 AV *av;
420 521
421 if (expect_false (!mg)) 522 if (expect_false (!mg))
422 { 523 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
423 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
424 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
425 mg->mg_virtual = &vtbl_coro;
426 mg->mg_obj = (SV *)newAV ();
427 }
428 524
429 av = (AV *)mg->mg_obj; 525 av = (AV *)mg->mg_obj;
430 526
431 if (expect_false (AvFILLp (av) >= AvMAX (av))) 527 if (expect_false (AvFILLp (av) >= AvMAX (av)))
432 av_extend (av, AvMAX (av) + 1); 528 av_extend (av, AvFILLp (av) + 1);
433 529
434 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 530 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
435} 531}
436 532
437/** load & save, init *******************************************************/ 533/** load & save, init *******************************************************/
534
535static void
536on_enterleave_call (pTHX_ SV *cb);
438 537
439static void 538static void
440load_perl (pTHX_ Coro__State c) 539load_perl (pTHX_ Coro__State c)
441{ 540{
442 perl_slots *slot = c->slot; 541 perl_slots *slot = c->slot;
443 c->slot = 0; 542 c->slot = 0;
444 543
445 PL_mainstack = c->mainstack; 544 PL_mainstack = c->mainstack;
446 545
447 GvSV (PL_defgv) = slot->defsv; 546 GvSV (PL_defgv) = slot->defsv;
448 GvAV (PL_defgv) = slot->defav; 547 GvAV (PL_defgv) = slot->defav;
449 GvSV (PL_errgv) = slot->errsv; 548 GvSV (PL_errgv) = slot->errsv;
450 GvSV (irsgv) = slot->irsgv; 549 GvSV (irsgv) = slot->irsgv;
550 GvHV (PL_hintgv) = slot->hinthv;
451 551
452 #define VAR(name,type) PL_ ## name = slot->name; 552 #define VAR(name,type) PL_ ## name = slot->name;
453 # include "state.h" 553 # include "state.h"
454 #undef VAR 554 #undef VAR
455
456 /*hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);*/
457 /*hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);*/
458 555
459 { 556 {
460 dSP; 557 dSP;
461 558
462 CV *cv; 559 CV *cv;
… …
469 CvPADLIST (cv) = (AV *)POPs; 566 CvPADLIST (cv) = (AV *)POPs;
470 } 567 }
471 568
472 PUTBACK; 569 PUTBACK;
473 } 570 }
571
572 slf_frame = c->slf_frame;
573 CORO_THROW = c->except;
574
575 if (expect_false (c->on_enter))
576 {
577 int i;
578
579 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
580 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
581 }
474} 582}
475 583
476static void 584static void
477save_perl (pTHX_ Coro__State c) 585save_perl (pTHX_ Coro__State c)
478{ 586{
587 if (expect_false (c->on_leave))
588 {
589 int i;
590
591 for (i = AvFILLp (c->on_leave); i >= 0; --i)
592 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
593 }
594
595 c->except = CORO_THROW;
596 c->slf_frame = slf_frame;
597
479 { 598 {
480 dSP; 599 dSP;
481 I32 cxix = cxstack_ix; 600 I32 cxix = cxstack_ix;
482 PERL_CONTEXT *ccstk = cxstack; 601 PERL_CONTEXT *ccstk = cxstack;
483 PERL_SI *top_si = PL_curstackinfo; 602 PERL_SI *top_si = PL_curstackinfo;
… …
501 620
502 if (expect_true (CvDEPTH (cv))) 621 if (expect_true (CvDEPTH (cv)))
503 { 622 {
504 EXTEND (SP, 3); 623 EXTEND (SP, 3);
505 PUSHs ((SV *)CvPADLIST (cv)); 624 PUSHs ((SV *)CvPADLIST (cv));
506 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 625 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
507 PUSHs ((SV *)cv); 626 PUSHs ((SV *)cv);
508 627
509 CvDEPTH (cv) = 0; 628 CvDEPTH (cv) = 0;
510 get_padlist (aTHX_ cv); 629 get_padlist (aTHX_ cv);
511 } 630 }
… …
538 c->mainstack = PL_mainstack; 657 c->mainstack = PL_mainstack;
539 658
540 { 659 {
541 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 660 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
542 661
543 slot->defav = GvAV (PL_defgv); 662 slot->defav = GvAV (PL_defgv);
544 slot->defsv = DEFSV; 663 slot->defsv = DEFSV;
545 slot->errsv = ERRSV; 664 slot->errsv = ERRSV;
546 slot->irsgv = GvSV (irsgv); 665 slot->irsgv = GvSV (irsgv);
666 slot->hinthv = GvHV (PL_hintgv);
547 667
548 #define VAR(name,type) slot->name = PL_ ## name; 668 #define VAR(name,type) slot->name = PL_ ## name;
549 # include "state.h" 669 # include "state.h"
550 #undef VAR 670 #undef VAR
551 } 671 }
552} 672}
553 673
554/* 674/*
555 * allocate various perl stacks. This is an exact copy 675 * allocate various perl stacks. This is almost an exact copy
556 * of perl.c:init_stacks, except that it uses less memory 676 * of perl.c:init_stacks, except that it uses less memory
557 * on the (sometimes correct) assumption that coroutines do 677 * on the (sometimes correct) assumption that coroutines do
558 * not usually need a lot of stackspace. 678 * not usually need a lot of stackspace.
559 */ 679 */
560#if CORO_PREFER_PERL_FUNCTIONS 680#if CORO_PREFER_PERL_FUNCTIONS
561# define coro_init_stacks init_stacks 681# define coro_init_stacks(thx) init_stacks ()
562#else 682#else
563static void 683static void
564coro_init_stacks (pTHX) 684coro_init_stacks (pTHX)
565{ 685{
566 PL_curstackinfo = new_stackinfo(32, 8); 686 PL_curstackinfo = new_stackinfo(32, 8);
… …
591 711
592 New(54,PL_savestack,24,ANY); 712 New(54,PL_savestack,24,ANY);
593 PL_savestack_ix = 0; 713 PL_savestack_ix = 0;
594 PL_savestack_max = 24; 714 PL_savestack_max = 24;
595 715
596#if !PERL_VERSION_ATLEAST (5,9,0) 716#if !PERL_VERSION_ATLEAST (5,10,0)
597 New(54,PL_retstack,4,OP*); 717 New(54,PL_retstack,4,OP*);
598 PL_retstack_ix = 0; 718 PL_retstack_ix = 0;
599 PL_retstack_max = 4; 719 PL_retstack_max = 4;
600#endif 720#endif
601} 721}
… …
603 723
604/* 724/*
605 * destroy the stacks, the callchain etc... 725 * destroy the stacks, the callchain etc...
606 */ 726 */
607static void 727static void
608coro_destroy_stacks (pTHX) 728coro_destruct_stacks (pTHX)
609{ 729{
610 while (PL_curstackinfo->si_next) 730 while (PL_curstackinfo->si_next)
611 PL_curstackinfo = PL_curstackinfo->si_next; 731 PL_curstackinfo = PL_curstackinfo->si_next;
612 732
613 while (PL_curstackinfo) 733 while (PL_curstackinfo)
… …
624 744
625 Safefree (PL_tmps_stack); 745 Safefree (PL_tmps_stack);
626 Safefree (PL_markstack); 746 Safefree (PL_markstack);
627 Safefree (PL_scopestack); 747 Safefree (PL_scopestack);
628 Safefree (PL_savestack); 748 Safefree (PL_savestack);
629#if !PERL_VERSION_ATLEAST (5,9,0) 749#if !PERL_VERSION_ATLEAST (5,10,0)
630 Safefree (PL_retstack); 750 Safefree (PL_retstack);
631#endif 751#endif
632} 752}
753
754#define CORO_RSS \
755 rss += sizeof (SYM (curstackinfo)); \
756 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
757 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
758 rss += SYM (tmps_max) * sizeof (SV *); \
759 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
760 rss += SYM (scopestack_max) * sizeof (I32); \
761 rss += SYM (savestack_max) * sizeof (ANY);
633 762
634static size_t 763static size_t
635coro_rss (pTHX_ struct coro *coro) 764coro_rss (pTHX_ struct coro *coro)
636{ 765{
637 size_t rss = sizeof (*coro); 766 size_t rss = sizeof (*coro);
638 767
639 if (coro->mainstack) 768 if (coro->mainstack)
640 { 769 {
641 perl_slots tmp_slot;
642 perl_slots *slot;
643
644 if (coro->flags & CF_RUNNING) 770 if (coro->flags & CF_RUNNING)
645 { 771 {
646 slot = &tmp_slot; 772 #define SYM(sym) PL_ ## sym
647 773 CORO_RSS;
648 #define VAR(name,type) slot->name = PL_ ## name;
649 # include "state.h"
650 #undef VAR 774 #undef SYM
651 } 775 }
652 else 776 else
653 slot = coro->slot; 777 {
654 778 #define SYM(sym) coro->slot->sym
655 rss += sizeof (slot->curstackinfo); 779 CORO_RSS;
656 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 780 #undef SYM
657 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 781 }
658 rss += slot->tmps_max * sizeof (SV *);
659 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
660 rss += slot->scopestack_max * sizeof (I32);
661 rss += slot->savestack_max * sizeof (ANY);
662
663#if !PERL_VERSION_ATLEAST (5,9,0)
664 rss += slot->retstack_max * sizeof (OP *);
665#endif
666 } 782 }
667 783
668 return rss; 784 return rss;
669} 785}
670 786
671/** coroutine stack handling ************************************************/ 787/** coroutine stack handling ************************************************/
672 788
789static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
790static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
791static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
792
793/* apparently < 5.8.8 */
794#ifndef MgPV_nolen_const
795#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
796 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
797 (const char*)(mg)->mg_ptr)
798#endif
799
800/*
801 * This overrides the default magic get method of %SIG elements.
802 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
803 * and instead of trying to save and restore the hash elements, we just provide
804 * readback here.
805 */
673static void 806static int
807coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
808{
809 const char *s = MgPV_nolen_const (mg);
810
811 if (*s == '_')
812 {
813 SV **svp = 0;
814
815 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
816 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
817
818 if (svp)
819 {
820 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
821 return 0;
822 }
823 }
824
825 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
826}
827
828static int
829coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
830{
831 const char *s = MgPV_nolen_const (mg);
832
833 if (*s == '_')
834 {
835 SV **svp = 0;
836
837 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
838 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
839
840 if (svp)
841 {
842 SV *old = *svp;
843 *svp = 0;
844 SvREFCNT_dec (old);
845 return 0;
846 }
847 }
848
849 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
850}
851
852static int
853coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
854{
855 const char *s = MgPV_nolen_const (mg);
856
857 if (*s == '_')
858 {
859 SV **svp = 0;
860
861 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
862 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
863
864 if (svp)
865 {
866 SV *old = *svp;
867 *svp = SvOK (sv) ? newSVsv (sv) : 0;
868 SvREFCNT_dec (old);
869 return 0;
870 }
871 }
872
873 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
874}
875
876static void
877prepare_nop (pTHX_ struct coro_transfer_args *ta)
878{
879 /* kind of mega-hacky, but works */
880 ta->next = ta->prev = (struct coro *)ta;
881}
882
883static int
884slf_check_nop (pTHX_ struct CoroSLF *frame)
885{
886 return 0;
887}
888
889static int
890slf_check_repeat (pTHX_ struct CoroSLF *frame)
891{
892 return 1;
893}
894
895static UNOP coro_setup_op;
896
897static void NOINLINE /* noinline to keep it out of the transfer fast path */
674coro_setup (pTHX_ struct coro *coro) 898coro_setup (pTHX_ struct coro *coro)
675{ 899{
676 /* 900 /*
677 * emulate part of the perl startup here. 901 * emulate part of the perl startup here.
678 */ 902 */
… …
680 904
681 PL_runops = RUNOPS_DEFAULT; 905 PL_runops = RUNOPS_DEFAULT;
682 PL_curcop = &PL_compiling; 906 PL_curcop = &PL_compiling;
683 PL_in_eval = EVAL_NULL; 907 PL_in_eval = EVAL_NULL;
684 PL_comppad = 0; 908 PL_comppad = 0;
909 PL_comppad_name = 0;
910 PL_comppad_name_fill = 0;
911 PL_comppad_name_floor = 0;
685 PL_curpm = 0; 912 PL_curpm = 0;
686 PL_curpad = 0; 913 PL_curpad = 0;
687 PL_localizing = 0; 914 PL_localizing = 0;
688 PL_dirty = 0; 915 PL_dirty = 0;
689 PL_restartop = 0; 916 PL_restartop = 0;
917#if PERL_VERSION_ATLEAST (5,10,0)
918 PL_parser = 0;
919#endif
920 PL_hints = 0;
921
922 /* recreate the die/warn hooks */
690 PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0); 923 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
691 PL_warnhook = 0; hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0); 924 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
692 925
693 GvSV (PL_defgv) = newSV (0); 926 GvSV (PL_defgv) = newSV (0);
694 GvAV (PL_defgv) = coro->args; coro->args = 0; 927 GvAV (PL_defgv) = coro->args; coro->args = 0;
695 GvSV (PL_errgv) = newSV (0); 928 GvSV (PL_errgv) = newSV (0);
696 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 929 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
930 GvHV (PL_hintgv) = 0;
697 PL_rs = newSVsv (GvSV (irsgv)); 931 PL_rs = newSVsv (GvSV (irsgv));
698 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 932 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
699 933
700 { 934 {
701 dSP; 935 dSP;
702 LOGOP myop; 936 UNOP myop;
703 937
704 Zero (&myop, 1, LOGOP); 938 Zero (&myop, 1, UNOP);
705 myop.op_next = Nullop; 939 myop.op_next = Nullop;
940 myop.op_type = OP_ENTERSUB;
706 myop.op_flags = OPf_WANT_VOID; 941 myop.op_flags = OPf_WANT_VOID;
707 942
708 PUSHMARK (SP); 943 PUSHMARK (SP);
709 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 944 PUSHs ((SV *)coro->startcv);
710 PUTBACK; 945 PUTBACK;
711 PL_op = (OP *)&myop; 946 PL_op = (OP *)&myop;
712 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 947 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
713 SPAGAIN;
714 } 948 }
715 949
716 /* this newly created coroutine might be run on an existing cctx which most 950 /* this newly created coroutine might be run on an existing cctx which most
717 * likely was suspended in set_stacklevel, called from entersub. 951 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
718 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
719 * so we ENTER here for symmetry
720 */ 952 */
721 ENTER; 953 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
722} 954 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
723 955
956 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
957 coro_setup_op.op_next = PL_op;
958 coro_setup_op.op_type = OP_ENTERSUB;
959 coro_setup_op.op_ppaddr = pp_slf;
960 /* no flags etc. required, as an init function won't be called */
961
962 PL_op = (OP *)&coro_setup_op;
963
964 /* copy throw, in case it was set before coro_setup */
965 CORO_THROW = coro->except;
966}
967
724static void 968static void
725coro_destroy (pTHX_ struct coro *coro) 969coro_unwind_stacks (pTHX)
726{ 970{
727 if (!IN_DESTRUCT) 971 if (!IN_DESTRUCT)
728 { 972 {
729 /* restore all saved variables and stuff */ 973 /* restore all saved variables and stuff */
730 LEAVE_SCOPE (0); 974 LEAVE_SCOPE (0);
… …
738 POPSTACK_TO (PL_mainstack); 982 POPSTACK_TO (PL_mainstack);
739 983
740 /* unwind main stack */ 984 /* unwind main stack */
741 dounwind (-1); 985 dounwind (-1);
742 } 986 }
987}
988
989static void
990coro_destruct_perl (pTHX_ struct coro *coro)
991{
992 coro_unwind_stacks (aTHX);
743 993
744 SvREFCNT_dec (GvSV (PL_defgv)); 994 SvREFCNT_dec (GvSV (PL_defgv));
745 SvREFCNT_dec (GvAV (PL_defgv)); 995 SvREFCNT_dec (GvAV (PL_defgv));
746 SvREFCNT_dec (GvSV (PL_errgv)); 996 SvREFCNT_dec (GvSV (PL_errgv));
747 SvREFCNT_dec (PL_defoutgv); 997 SvREFCNT_dec (PL_defoutgv);
748 SvREFCNT_dec (PL_rs); 998 SvREFCNT_dec (PL_rs);
749 SvREFCNT_dec (GvSV (irsgv)); 999 SvREFCNT_dec (GvSV (irsgv));
1000 SvREFCNT_dec (GvHV (PL_hintgv));
750 1001
751 SvREFCNT_dec (PL_diehook); 1002 SvREFCNT_dec (PL_diehook);
752 SvREFCNT_dec (PL_warnhook); 1003 SvREFCNT_dec (PL_warnhook);
753 1004
754 SvREFCNT_dec (coro->saved_deffh); 1005 SvREFCNT_dec (coro->saved_deffh);
755 SvREFCNT_dec (coro->throw); 1006 SvREFCNT_dec (coro->rouse_cb);
1007 SvREFCNT_dec (coro->invoke_cb);
1008 SvREFCNT_dec (coro->invoke_av);
756 1009
757 coro_destroy_stacks (aTHX); 1010 coro_destruct_stacks (aTHX);
758} 1011}
759 1012
760static void 1013INLINE void
761free_coro_mortal (pTHX) 1014free_coro_mortal (pTHX)
762{ 1015{
763 if (expect_true (coro_mortal)) 1016 if (expect_true (coro_mortal))
764 { 1017 {
765 SvREFCNT_dec (coro_mortal); 1018 SvREFCNT_dec (coro_mortal);
… …
770static int 1023static int
771runops_trace (pTHX) 1024runops_trace (pTHX)
772{ 1025{
773 COP *oldcop = 0; 1026 COP *oldcop = 0;
774 int oldcxix = -2; 1027 int oldcxix = -2;
775 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
776 coro_cctx *cctx = coro->cctx;
777 1028
778 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1029 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
779 { 1030 {
780 PERL_ASYNC_CHECK (); 1031 PERL_ASYNC_CHECK ();
781 1032
782 if (cctx->flags & CC_TRACE_ALL) 1033 if (cctx_current->flags & CC_TRACE_ALL)
783 { 1034 {
784 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1035 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
785 { 1036 {
786 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1037 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
787 SV **bot, **top; 1038 SV **bot, **top;
788 AV *av = newAV (); /* return values */ 1039 AV *av = newAV (); /* return values */
789 SV **cb; 1040 SV **cb;
… …
799 : cx->blk_gimme == G_SCALAR ? bot + 1 1050 : cx->blk_gimme == G_SCALAR ? bot + 1
800 : bot; 1051 : bot;
801 1052
802 av_extend (av, top - bot); 1053 av_extend (av, top - bot);
803 while (bot < top) 1054 while (bot < top)
804 av_push (av, SvREFCNT_inc (*bot++)); 1055 av_push (av, SvREFCNT_inc_NN (*bot++));
805 1056
806 PL_runops = RUNOPS_DEFAULT; 1057 PL_runops = RUNOPS_DEFAULT;
807 ENTER; 1058 ENTER;
808 SAVETMPS; 1059 SAVETMPS;
809 EXTEND (SP, 3); 1060 EXTEND (SP, 3);
… …
826 1077
827 if (PL_curcop != &PL_compiling) 1078 if (PL_curcop != &PL_compiling)
828 { 1079 {
829 SV **cb; 1080 SV **cb;
830 1081
831 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1082 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
832 { 1083 {
833 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1084 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
834 1085
835 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1086 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
836 { 1087 {
837 runops_proc_t old_runops = PL_runops;
838 dSP; 1088 dSP;
839 GV *gv = CvGV (cx->blk_sub.cv); 1089 GV *gv = CvGV (cx->blk_sub.cv);
840 SV *fullname = sv_2mortal (newSV (0)); 1090 SV *fullname = sv_2mortal (newSV (0));
841 1091
842 if (isGV (gv)) 1092 if (isGV (gv))
… …
847 SAVETMPS; 1097 SAVETMPS;
848 EXTEND (SP, 3); 1098 EXTEND (SP, 3);
849 PUSHMARK (SP); 1099 PUSHMARK (SP);
850 PUSHs (&PL_sv_yes); 1100 PUSHs (&PL_sv_yes);
851 PUSHs (fullname); 1101 PUSHs (fullname);
852 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1102 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
853 PUTBACK; 1103 PUTBACK;
854 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1104 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
855 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1105 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
856 SPAGAIN; 1106 SPAGAIN;
857 FREETMPS; 1107 FREETMPS;
… …
860 } 1110 }
861 1111
862 oldcxix = cxstack_ix; 1112 oldcxix = cxstack_ix;
863 } 1113 }
864 1114
865 if (cctx->flags & CC_TRACE_LINE) 1115 if (cctx_current->flags & CC_TRACE_LINE)
866 { 1116 {
867 dSP; 1117 dSP;
868 1118
869 PL_runops = RUNOPS_DEFAULT; 1119 PL_runops = RUNOPS_DEFAULT;
870 ENTER; 1120 ENTER;
… …
889 1139
890 TAINT_NOT; 1140 TAINT_NOT;
891 return 0; 1141 return 0;
892} 1142}
893 1143
894/* inject a fake call to Coro::State::_cctx_init into the execution */ 1144static struct CoroSLF cctx_ssl_frame;
895/* _cctx_init should be careful, as it could be called at almost any time */ 1145
896/* during execution of a perl program */ 1146static void
1147slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1148{
1149 ta->prev = 0;
1150}
1151
1152static int
1153slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1154{
1155 *frame = cctx_ssl_frame;
1156
1157 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1158}
1159
1160/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
897static void NOINLINE 1161static void NOINLINE
898cctx_prepare (pTHX_ coro_cctx *cctx) 1162cctx_prepare (pTHX)
899{ 1163{
900 dSP;
901 LOGOP myop;
902
903 PL_top_env = &PL_start_env; 1164 PL_top_env = &PL_start_env;
904 1165
905 if (cctx->flags & CC_TRACE) 1166 if (cctx_current->flags & CC_TRACE)
906 PL_runops = runops_trace; 1167 PL_runops = runops_trace;
907 1168
908 Zero (&myop, 1, LOGOP); 1169 /* we already must be executing an SLF op, there is no other valid way
909 myop.op_next = PL_op; 1170 * that can lead to creation of a new cctx */
910 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1171 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1172 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
911 1173
912 PUSHMARK (SP); 1174 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
913 EXTEND (SP, 2); 1175 cctx_ssl_frame = slf_frame;
914 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1176
915 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1177 slf_frame.prepare = slf_prepare_set_stacklevel;
916 PUTBACK; 1178 slf_frame.check = slf_check_set_stacklevel;
917 PL_op = (OP *)&myop; 1179}
918 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1180
919 SPAGAIN; 1181/* the tail of transfer: execute stuff we can only do after a transfer */
1182INLINE void
1183transfer_tail (pTHX)
1184{
1185 free_coro_mortal (aTHX);
920} 1186}
921 1187
922/* 1188/*
923 * this is a _very_ stripped down perl interpreter ;) 1189 * this is a _very_ stripped down perl interpreter ;)
924 */ 1190 */
925static void 1191static void
926cctx_run (void *arg) 1192cctx_run (void *arg)
927{ 1193{
1194#ifdef USE_ITHREADS
1195# if CORO_PTHREAD
1196 PERL_SET_CONTEXT (coro_thx);
1197# endif
1198#endif
1199 {
928 dTHX; 1200 dTHX;
929 1201
930 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1202 /* normally we would need to skip the entersub here */
931 UNLOCK; 1203 /* not doing so will re-execute it, which is exactly what we want */
932
933 /* we now skip the entersub that lead to transfer() */
934 PL_op = PL_op->op_next; 1204 /* PL_nop = PL_nop->op_next */
935 1205
936 /* inject a fake subroutine call to cctx_init */ 1206 /* inject a fake subroutine call to cctx_init */
937 cctx_prepare (aTHX_ (coro_cctx *)arg); 1207 cctx_prepare (aTHX);
938 1208
1209 /* cctx_run is the alternative tail of transfer() */
1210 transfer_tail (aTHX);
1211
939 /* somebody or something will hit me for both perl_run and PL_restartop */ 1212 /* somebody or something will hit me for both perl_run and PL_restartop */
940 PL_restartop = PL_op; 1213 PL_restartop = PL_op;
941 perl_run (PL_curinterp); 1214 perl_run (PL_curinterp);
942
943 /* 1215 /*
1216 * Unfortunately, there is no way to get at the return values of the
1217 * coro body here, as perl_run destroys these
1218 */
1219
1220 /*
944 * If perl-run returns we assume exit() was being called or the coro 1221 * If perl-run returns we assume exit() was being called or the coro
945 * fell off the end, which seems to be the only valid (non-bug) 1222 * fell off the end, which seems to be the only valid (non-bug)
946 * reason for perl_run to return. We try to exit by jumping to the 1223 * reason for perl_run to return. We try to exit by jumping to the
947 * bootstrap-time "top" top_env, as we cannot restore the "main" 1224 * bootstrap-time "top" top_env, as we cannot restore the "main"
948 * coroutine as Coro has no such concept 1225 * coroutine as Coro has no such concept.
1226 * This actually isn't valid with the pthread backend, but OSes requiring
1227 * that backend are too broken to do it in a standards-compliant way.
949 */ 1228 */
950 PL_top_env = main_top_env; 1229 PL_top_env = main_top_env;
951 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1230 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1231 }
952} 1232}
953 1233
954static coro_cctx * 1234static coro_cctx *
955cctx_new () 1235cctx_new ()
956{ 1236{
957 coro_cctx *cctx; 1237 coro_cctx *cctx;
1238
1239 ++cctx_count;
1240 New (0, cctx, 1, coro_cctx);
1241
1242 cctx->gen = cctx_gen;
1243 cctx->flags = 0;
1244 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1245
1246 return cctx;
1247}
1248
1249/* create a new cctx only suitable as source */
1250static coro_cctx *
1251cctx_new_empty ()
1252{
1253 coro_cctx *cctx = cctx_new ();
1254
1255 cctx->sptr = 0;
1256 coro_create (&cctx->cctx, 0, 0, 0, 0);
1257
1258 return cctx;
1259}
1260
1261/* create a new cctx suitable as destination/running a perl interpreter */
1262static coro_cctx *
1263cctx_new_run ()
1264{
1265 coro_cctx *cctx = cctx_new ();
958 void *stack_start; 1266 void *stack_start;
959 size_t stack_size; 1267 size_t stack_size;
960 1268
961 ++cctx_count;
962
963 Newz (0, cctx, 1, coro_cctx);
964
965#if HAVE_MMAP 1269#if HAVE_MMAP
966 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1270 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
967 /* mmap supposedly does allocate-on-write for us */ 1271 /* mmap supposedly does allocate-on-write for us */
968 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1272 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
969 1273
970 if (cctx->sptr != (void *)-1) 1274 if (cctx->sptr != (void *)-1)
971 { 1275 {
972# if CORO_STACKGUARD 1276 #if CORO_STACKGUARD
973 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1277 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
974# endif 1278 #endif
975 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1279 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
976 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1280 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
977 cctx->flags |= CC_MAPPED; 1281 cctx->flags |= CC_MAPPED;
978 } 1282 }
979 else 1283 else
980#endif 1284#endif
981 { 1285 {
982 cctx->ssize = coro_stacksize * (long)sizeof (long); 1286 cctx->ssize = cctx_stacksize * (long)sizeof (long);
983 New (0, cctx->sptr, coro_stacksize, long); 1287 New (0, cctx->sptr, cctx_stacksize, long);
984 1288
985 if (!cctx->sptr) 1289 if (!cctx->sptr)
986 { 1290 {
987 perror ("FATAL: unable to allocate stack for coroutine"); 1291 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
988 _exit (EXIT_FAILURE); 1292 _exit (EXIT_FAILURE);
989 } 1293 }
990 1294
991 stack_start = cctx->sptr; 1295 stack_start = cctx->sptr;
992 stack_size = cctx->ssize; 1296 stack_size = cctx->ssize;
993 } 1297 }
994 1298
995 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1299 #if CORO_USE_VALGRIND
1300 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1301 #endif
1302
996 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1303 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
997 1304
998 return cctx; 1305 return cctx;
999} 1306}
1000 1307
… …
1002cctx_destroy (coro_cctx *cctx) 1309cctx_destroy (coro_cctx *cctx)
1003{ 1310{
1004 if (!cctx) 1311 if (!cctx)
1005 return; 1312 return;
1006 1313
1314 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1315
1007 --cctx_count; 1316 --cctx_count;
1317 coro_destroy (&cctx->cctx);
1008 1318
1319 /* coro_transfer creates new, empty cctx's */
1320 if (cctx->sptr)
1321 {
1009#if CORO_USE_VALGRIND 1322 #if CORO_USE_VALGRIND
1010 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1323 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1011#endif 1324 #endif
1012 1325
1013#if HAVE_MMAP 1326#if HAVE_MMAP
1014 if (cctx->flags & CC_MAPPED) 1327 if (cctx->flags & CC_MAPPED)
1015 munmap (cctx->sptr, cctx->ssize); 1328 munmap (cctx->sptr, cctx->ssize);
1016 else 1329 else
1017#endif 1330#endif
1018 Safefree (cctx->sptr); 1331 Safefree (cctx->sptr);
1332 }
1019 1333
1020 Safefree (cctx); 1334 Safefree (cctx);
1021} 1335}
1022 1336
1023/* wether this cctx should be destructed */ 1337/* wether this cctx should be destructed */
1024#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1338#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1025 1339
1026static coro_cctx * 1340static coro_cctx *
1027cctx_get (pTHX) 1341cctx_get (pTHX)
1028{ 1342{
1029 while (expect_true (cctx_first)) 1343 while (expect_true (cctx_first))
… …
1036 return cctx; 1350 return cctx;
1037 1351
1038 cctx_destroy (cctx); 1352 cctx_destroy (cctx);
1039 } 1353 }
1040 1354
1041 return cctx_new (); 1355 return cctx_new_run ();
1042} 1356}
1043 1357
1044static void 1358static void
1045cctx_put (coro_cctx *cctx) 1359cctx_put (coro_cctx *cctx)
1046{ 1360{
1361 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1362
1047 /* free another cctx if overlimit */ 1363 /* free another cctx if overlimit */
1048 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1364 if (expect_false (cctx_idle >= cctx_max_idle))
1049 { 1365 {
1050 coro_cctx *first = cctx_first; 1366 coro_cctx *first = cctx_first;
1051 cctx_first = first->next; 1367 cctx_first = first->next;
1052 --cctx_idle; 1368 --cctx_idle;
1053 1369
… …
1062/** coroutine switching *****************************************************/ 1378/** coroutine switching *****************************************************/
1063 1379
1064static void 1380static void
1065transfer_check (pTHX_ struct coro *prev, struct coro *next) 1381transfer_check (pTHX_ struct coro *prev, struct coro *next)
1066{ 1382{
1383 /* TODO: throwing up here is considered harmful */
1384
1067 if (expect_true (prev != next)) 1385 if (expect_true (prev != next))
1068 { 1386 {
1069 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1387 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1070 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1388 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1071 1389
1072 if (expect_false (next->flags & CF_RUNNING))
1073 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1074
1075 if (expect_false (next->flags & CF_DESTROYED)) 1390 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1076 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1391 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1077 1392
1078 if (
1079#if PERL_VERSION_ATLEAST (5,9,0) 1393#if !PERL_VERSION_ATLEAST (5,10,0)
1080 expect_false (PL_parser)
1081#else
1082 expect_false (PL_lex_state != LEX_NOTPARSING) 1394 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1083#endif
1084 )
1085 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1395 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1396#endif
1086 } 1397 }
1087} 1398}
1088 1399
1089/* always use the TRANSFER macro */ 1400/* always use the TRANSFER macro */
1090static void NOINLINE 1401static void NOINLINE /* noinline so we have a fixed stackframe */
1091transfer (pTHX_ struct coro *prev, struct coro *next) 1402transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1092{ 1403{
1093 dSTACKLEVEL; 1404 dSTACKLEVEL;
1094 1405
1095 /* sometimes transfer is only called to set idle_sp */ 1406 /* sometimes transfer is only called to set idle_sp */
1096 if (expect_false (!next)) 1407 if (expect_false (!prev))
1097 { 1408 {
1098 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1409 cctx_current->idle_sp = STACKLEVEL;
1099 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1410 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1100 } 1411 }
1101 else if (expect_true (prev != next)) 1412 else if (expect_true (prev != next))
1102 { 1413 {
1103 coro_cctx *prev__cctx; 1414 coro_cctx *cctx_prev;
1104 1415
1105 if (expect_false (prev->flags & CF_NEW)) 1416 if (expect_false (prev->flags & CF_NEW))
1106 { 1417 {
1107 /* create a new empty context */ 1418 /* create a new empty/source context */
1108 Newz (0, prev->cctx, 1, coro_cctx);
1109 prev->flags &= ~CF_NEW; 1419 prev->flags &= ~CF_NEW;
1110 prev->flags |= CF_RUNNING; 1420 prev->flags |= CF_RUNNING;
1111 } 1421 }
1112 1422
1113 prev->flags &= ~CF_RUNNING; 1423 prev->flags &= ~CF_RUNNING;
1114 next->flags |= CF_RUNNING; 1424 next->flags |= CF_RUNNING;
1115 1425
1116 LOCK; 1426 /* first get rid of the old state */
1427 save_perl (aTHX_ prev);
1117 1428
1118 if (expect_false (next->flags & CF_NEW)) 1429 if (expect_false (next->flags & CF_NEW))
1119 { 1430 {
1120 /* need to start coroutine */ 1431 /* need to start coroutine */
1121 next->flags &= ~CF_NEW; 1432 next->flags &= ~CF_NEW;
1122 /* first get rid of the old state */
1123 save_perl (aTHX_ prev);
1124 /* setup coroutine call */ 1433 /* setup coroutine call */
1125 coro_setup (aTHX_ next); 1434 coro_setup (aTHX_ next);
1126 } 1435 }
1127 else 1436 else
1437 load_perl (aTHX_ next);
1438
1439 /* possibly untie and reuse the cctx */
1440 if (expect_true (
1441 cctx_current->idle_sp == STACKLEVEL
1442 && !(cctx_current->flags & CC_TRACE)
1443 && !force_cctx
1444 ))
1128 { 1445 {
1129 /* coroutine already started */ 1446 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1130 save_perl (aTHX_ prev); 1447 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1131 load_perl (aTHX_ next); 1448
1449 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1450 /* without this the next cctx_get might destroy the running cctx while still in use */
1451 if (expect_false (CCTX_EXPIRED (cctx_current)))
1452 if (expect_true (!next->cctx))
1453 next->cctx = cctx_get (aTHX);
1454
1455 cctx_put (cctx_current);
1132 } 1456 }
1457 else
1458 prev->cctx = cctx_current;
1133 1459
1134 prev__cctx = prev->cctx; 1460 ++next->usecount;
1135 1461
1136 /* possibly "free" the cctx */ 1462 cctx_prev = cctx_current;
1137 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1463 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1464
1465 next->cctx = 0;
1466
1467 if (expect_false (cctx_prev != cctx_current))
1138 { 1468 {
1139 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1469 cctx_prev->top_env = PL_top_env;
1140 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1470 PL_top_env = cctx_current->top_env;
1141 1471 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1142 prev->cctx = 0;
1143
1144 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1145 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1146 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1147 if (!next->cctx)
1148 next->cctx = cctx_get (aTHX);
1149
1150 cctx_put (prev__cctx);
1151 } 1472 }
1152 1473
1153 ++next->usecount; 1474 transfer_tail (aTHX);
1154
1155 if (expect_true (!next->cctx))
1156 next->cctx = cctx_get (aTHX);
1157
1158 if (expect_false (prev__cctx != next->cctx))
1159 {
1160 prev__cctx->top_env = PL_top_env;
1161 PL_top_env = next->cctx->top_env;
1162 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1163 }
1164
1165 free_coro_mortal (aTHX);
1166 UNLOCK;
1167
1168 if (expect_false (prev->throw || next->throw))
1169 {
1170 struct coro *coro = SvSTATE (coro_current);
1171
1172 if (coro->throw)
1173 {
1174 SV *exception = coro->throw;
1175 coro->throw = 0;
1176 sv_setsv (ERRSV, exception);
1177 croak (0);
1178 }
1179 }
1180 } 1475 }
1181} 1476}
1182 1477
1183struct transfer_args
1184{
1185 struct coro *prev, *next;
1186};
1187
1188#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1478#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1189#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1479#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1190 1480
1191/** high level stuff ********************************************************/ 1481/** high level stuff ********************************************************/
1192 1482
1193static int 1483static int
1194coro_state_destroy (pTHX_ struct coro *coro) 1484coro_state_destroy (pTHX_ struct coro *coro)
1195{ 1485{
1196 if (coro->flags & CF_DESTROYED) 1486 if (coro->flags & CF_DESTROYED)
1197 return 0; 1487 return 0;
1488
1489 if (coro->on_destroy)
1490 coro->on_destroy (aTHX_ coro);
1198 1491
1199 coro->flags |= CF_DESTROYED; 1492 coro->flags |= CF_DESTROYED;
1200 1493
1201 if (coro->flags & CF_READY) 1494 if (coro->flags & CF_READY)
1202 { 1495 {
1203 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1496 /* reduce nready, as destroying a ready coro effectively unreadies it */
1204 /* alternative: look through all ready queues and remove the coro */ 1497 /* alternative: look through all ready queues and remove the coro */
1205 LOCK;
1206 --coro_nready; 1498 --coro_nready;
1207 UNLOCK;
1208 } 1499 }
1209 else 1500 else
1210 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1501 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1211 1502
1212 if (coro->mainstack && coro->mainstack != main_mainstack) 1503 if (coro->mainstack
1504 && coro->mainstack != main_mainstack
1505 && coro->slot
1506 && !PL_dirty)
1213 { 1507 {
1214 struct coro temp; 1508 struct coro *current = SvSTATE_current;
1215 1509
1216 if (coro->flags & CF_RUNNING) 1510 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1217 croak ("FATAL: tried to destroy currently running coroutine");
1218 1511
1219 save_perl (aTHX_ &temp); 1512 save_perl (aTHX_ current);
1220 load_perl (aTHX_ coro); 1513 load_perl (aTHX_ coro);
1221 1514
1222 coro_destroy (aTHX_ coro); 1515 coro_destruct_perl (aTHX_ coro);
1223 1516
1224 load_perl (aTHX_ &temp); 1517 load_perl (aTHX_ current);
1225 1518
1226 coro->slot = 0; 1519 coro->slot = 0;
1227 } 1520 }
1228 1521
1229 cctx_destroy (coro->cctx); 1522 cctx_destroy (coro->cctx);
1523 SvREFCNT_dec (coro->startcv);
1230 SvREFCNT_dec (coro->args); 1524 SvREFCNT_dec (coro->args);
1525 SvREFCNT_dec (CORO_THROW);
1231 1526
1232 if (coro->next) coro->next->prev = coro->prev; 1527 if (coro->next) coro->next->prev = coro->prev;
1233 if (coro->prev) coro->prev->next = coro->next; 1528 if (coro->prev) coro->prev->next = coro->next;
1234 if (coro == coro_first) coro_first = coro->next; 1529 if (coro == coro_first) coro_first = coro->next;
1235 1530
… …
1273# define MGf_DUP 0 1568# define MGf_DUP 0
1274#endif 1569#endif
1275}; 1570};
1276 1571
1277static void 1572static void
1278prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1573prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1279{ 1574{
1280 ta->prev = SvSTATE (prev_sv); 1575 ta->prev = SvSTATE (prev_sv);
1281 ta->next = SvSTATE (next_sv); 1576 ta->next = SvSTATE (next_sv);
1282 TRANSFER_CHECK (*ta); 1577 TRANSFER_CHECK (*ta);
1283} 1578}
1284 1579
1285static void 1580static void
1286api_transfer (SV *prev_sv, SV *next_sv) 1581api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1287{ 1582{
1288 dTHX;
1289 struct transfer_args ta; 1583 struct coro_transfer_args ta;
1290 1584
1291 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1585 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1292 TRANSFER (ta); 1586 TRANSFER (ta, 1);
1587}
1588
1589/*****************************************************************************/
1590/* gensub: simple closure generation utility */
1591
1592#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1593
1594/* create a closure from XS, returns a code reference */
1595/* the arg can be accessed via GENSUB_ARG from the callback */
1596/* the callback must use dXSARGS/XSRETURN */
1597static SV *
1598gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1599{
1600 CV *cv = (CV *)newSV (0);
1601
1602 sv_upgrade ((SV *)cv, SVt_PVCV);
1603
1604 CvANON_on (cv);
1605 CvISXSUB_on (cv);
1606 CvXSUB (cv) = xsub;
1607 GENSUB_ARG = arg;
1608
1609 return newRV_noinc ((SV *)cv);
1293} 1610}
1294 1611
1295/** Coro ********************************************************************/ 1612/** Coro ********************************************************************/
1296 1613
1297static void 1614INLINE void
1298coro_enq (pTHX_ SV *coro_sv) 1615coro_enq (pTHX_ struct coro *coro)
1299{ 1616{
1300 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1617 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1301} 1618}
1302 1619
1303static SV * 1620INLINE SV *
1304coro_deq (pTHX_ int min_prio) 1621coro_deq (pTHX)
1305{ 1622{
1306 int prio = PRIO_MAX - PRIO_MIN; 1623 int prio;
1307 1624
1308 min_prio -= PRIO_MIN;
1309 if (min_prio < 0)
1310 min_prio = 0;
1311
1312 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1625 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1313 if (AvFILLp (coro_ready [prio]) >= 0) 1626 if (AvFILLp (coro_ready [prio]) >= 0)
1314 return av_shift (coro_ready [prio]); 1627 return av_shift (coro_ready [prio]);
1315 1628
1316 return 0; 1629 return 0;
1317} 1630}
1318 1631
1319static int 1632static int
1320api_ready (SV *coro_sv) 1633api_ready (pTHX_ SV *coro_sv)
1321{ 1634{
1322 dTHX;
1323 struct coro *coro; 1635 struct coro *coro;
1324 1636 SV *sv_hook;
1325 if (SvROK (coro_sv)) 1637 void (*xs_hook)(void);
1326 coro_sv = SvRV (coro_sv);
1327 1638
1328 coro = SvSTATE (coro_sv); 1639 coro = SvSTATE (coro_sv);
1329 1640
1330 if (coro->flags & CF_READY) 1641 if (coro->flags & CF_READY)
1331 return 0; 1642 return 0;
1332 1643
1333 coro->flags |= CF_READY; 1644 coro->flags |= CF_READY;
1334 1645
1335 LOCK; 1646 sv_hook = coro_nready ? 0 : coro_readyhook;
1336 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1647 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1648
1649 coro_enq (aTHX_ coro);
1337 ++coro_nready; 1650 ++coro_nready;
1338 UNLOCK; 1651
1652 if (sv_hook)
1653 {
1654 dSP;
1655
1656 ENTER;
1657 SAVETMPS;
1658
1659 PUSHMARK (SP);
1660 PUTBACK;
1661 call_sv (sv_hook, G_VOID | G_DISCARD);
1662
1663 FREETMPS;
1664 LEAVE;
1665 }
1666
1667 if (xs_hook)
1668 xs_hook ();
1339 1669
1340 return 1; 1670 return 1;
1341} 1671}
1342 1672
1343static int 1673static int
1344api_is_ready (SV *coro_sv) 1674api_is_ready (pTHX_ SV *coro_sv)
1345{ 1675{
1346 dTHX;
1347 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1676 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1348} 1677}
1349 1678
1350static void 1679/* expects to own a reference to next->hv */
1680INLINE void
1351prepare_schedule (pTHX_ struct transfer_args *ta) 1681prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1352{ 1682{
1353 SV *prev_sv, *next_sv;
1354
1355 for (;;)
1356 {
1357 LOCK;
1358 next_sv = coro_deq (aTHX_ PRIO_MIN);
1359
1360 /* nothing to schedule: call the idle handler */
1361 if (expect_false (!next_sv))
1362 {
1363 dSP;
1364 UNLOCK;
1365
1366 ENTER;
1367 SAVETMPS;
1368
1369 PUSHMARK (SP);
1370 PUTBACK;
1371 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1372
1373 FREETMPS;
1374 LEAVE;
1375 continue;
1376 }
1377
1378 ta->next = SvSTATE (next_sv);
1379
1380 /* cannot transfer to destroyed coros, skip and look for next */
1381 if (expect_false (ta->next->flags & CF_DESTROYED))
1382 {
1383 UNLOCK;
1384 SvREFCNT_dec (next_sv);
1385 /* coro_nready is already taken care of by destroy */
1386 continue;
1387 }
1388
1389 --coro_nready;
1390 UNLOCK;
1391 break;
1392 }
1393
1394 /* free this only after the transfer */
1395 prev_sv = SvRV (coro_current); 1683 SV *prev_sv = SvRV (coro_current);
1684
1396 ta->prev = SvSTATE (prev_sv); 1685 ta->prev = SvSTATE_hv (prev_sv);
1686 ta->next = next;
1687
1397 TRANSFER_CHECK (*ta); 1688 TRANSFER_CHECK (*ta);
1398 assert (ta->next->flags & CF_READY); 1689
1399 ta->next->flags &= ~CF_READY;
1400 SvRV_set (coro_current, next_sv); 1690 SvRV_set (coro_current, (SV *)next->hv);
1401 1691
1402 LOCK;
1403 free_coro_mortal (aTHX); 1692 free_coro_mortal (aTHX);
1404 coro_mortal = prev_sv; 1693 coro_mortal = prev_sv;
1405 UNLOCK;
1406} 1694}
1407 1695
1408static void 1696static void
1697prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1698{
1699 for (;;)
1700 {
1701 SV *next_sv = coro_deq (aTHX);
1702
1703 if (expect_true (next_sv))
1704 {
1705 struct coro *next = SvSTATE_hv (next_sv);
1706
1707 /* cannot transfer to destroyed coros, skip and look for next */
1708 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1709 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1710 else
1711 {
1712 next->flags &= ~CF_READY;
1713 --coro_nready;
1714
1715 prepare_schedule_to (aTHX_ ta, next);
1716 break;
1717 }
1718 }
1719 else
1720 {
1721 /* nothing to schedule: call the idle handler */
1722 if (SvROK (sv_idle)
1723 && SvOBJECT (SvRV (sv_idle)))
1724 {
1725 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1726 api_ready (aTHX_ SvRV (sv_idle));
1727 --coro_nready;
1728 }
1729 else
1730 {
1731 dSP;
1732
1733 ENTER;
1734 SAVETMPS;
1735
1736 PUSHMARK (SP);
1737 PUTBACK;
1738 call_sv (sv_idle, G_VOID | G_DISCARD);
1739
1740 FREETMPS;
1741 LEAVE;
1742 }
1743 }
1744 }
1745}
1746
1747INLINE void
1409prepare_cede (pTHX_ struct transfer_args *ta) 1748prepare_cede (pTHX_ struct coro_transfer_args *ta)
1410{ 1749{
1411 api_ready (coro_current); 1750 api_ready (aTHX_ coro_current);
1412 prepare_schedule (aTHX_ ta); 1751 prepare_schedule (aTHX_ ta);
1413} 1752}
1414 1753
1754INLINE void
1755prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1756{
1757 SV *prev = SvRV (coro_current);
1758
1759 if (coro_nready)
1760 {
1761 prepare_schedule (aTHX_ ta);
1762 api_ready (aTHX_ prev);
1763 }
1764 else
1765 prepare_nop (aTHX_ ta);
1766}
1767
1768static void
1769api_schedule (pTHX)
1770{
1771 struct coro_transfer_args ta;
1772
1773 prepare_schedule (aTHX_ &ta);
1774 TRANSFER (ta, 1);
1775}
1776
1777static void
1778api_schedule_to (pTHX_ SV *coro_sv)
1779{
1780 struct coro_transfer_args ta;
1781 struct coro *next = SvSTATE (coro_sv);
1782
1783 SvREFCNT_inc_NN (coro_sv);
1784 prepare_schedule_to (aTHX_ &ta, next);
1785}
1786
1415static int 1787static int
1416prepare_cede_notself (pTHX_ struct transfer_args *ta) 1788api_cede (pTHX)
1417{ 1789{
1418 if (coro_nready) 1790 struct coro_transfer_args ta;
1419 { 1791
1420 SV *prev = SvRV (coro_current);
1421 prepare_schedule (aTHX_ ta); 1792 prepare_cede (aTHX_ &ta);
1422 api_ready (prev); 1793
1794 if (expect_true (ta.prev != ta.next))
1795 {
1796 TRANSFER (ta, 1);
1423 return 1; 1797 return 1;
1424 } 1798 }
1425 else 1799 else
1426 return 0; 1800 return 0;
1427} 1801}
1428 1802
1429static void
1430api_schedule (void)
1431{
1432 dTHX;
1433 struct transfer_args ta;
1434
1435 prepare_schedule (aTHX_ &ta);
1436 TRANSFER (ta);
1437}
1438
1439static int 1803static int
1440api_cede (void) 1804api_cede_notself (pTHX)
1441{ 1805{
1442 dTHX; 1806 if (coro_nready)
1807 {
1443 struct transfer_args ta; 1808 struct coro_transfer_args ta;
1444 1809
1445 prepare_cede (aTHX_ &ta); 1810 prepare_cede_notself (aTHX_ &ta);
1446
1447 if (expect_true (ta.prev != ta.next))
1448 {
1449 TRANSFER (ta); 1811 TRANSFER (ta, 1);
1450 return 1; 1812 return 1;
1451 } 1813 }
1452 else 1814 else
1453 return 0; 1815 return 0;
1454} 1816}
1455 1817
1456static int 1818static void
1457api_cede_notself (void)
1458{
1459 dTHX;
1460 struct transfer_args ta;
1461
1462 if (prepare_cede_notself (aTHX_ &ta))
1463 {
1464 TRANSFER (ta);
1465 return 1;
1466 }
1467 else
1468 return 0;
1469}
1470
1471static void
1472api_trace (SV *coro_sv, int flags) 1819api_trace (pTHX_ SV *coro_sv, int flags)
1473{ 1820{
1474 dTHX;
1475 struct coro *coro = SvSTATE (coro_sv); 1821 struct coro *coro = SvSTATE (coro_sv);
1476 1822
1823 if (coro->flags & CF_RUNNING)
1824 croak ("cannot enable tracing on a running coroutine, caught");
1825
1477 if (flags & CC_TRACE) 1826 if (flags & CC_TRACE)
1478 { 1827 {
1479 if (!coro->cctx) 1828 if (!coro->cctx)
1480 coro->cctx = cctx_new (); 1829 coro->cctx = cctx_new_run ();
1481 else if (!(coro->cctx->flags & CC_TRACE)) 1830 else if (!(coro->cctx->flags & CC_TRACE))
1482 croak ("cannot enable tracing on coroutine with custom stack"); 1831 croak ("cannot enable tracing on coroutine with custom stack, caught");
1483 1832
1484 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1833 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1485 } 1834 }
1486 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1835 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487 { 1836 {
… …
1492 else 1841 else
1493 coro->slot->runops = RUNOPS_DEFAULT; 1842 coro->slot->runops = RUNOPS_DEFAULT;
1494 } 1843 }
1495} 1844}
1496 1845
1846static void
1847coro_call_on_destroy (pTHX_ struct coro *coro)
1848{
1849 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1850 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1851
1852 if (on_destroyp)
1853 {
1854 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1855
1856 while (AvFILLp (on_destroy) >= 0)
1857 {
1858 dSP; /* don't disturb outer sp */
1859 SV *cb = av_pop (on_destroy);
1860
1861 PUSHMARK (SP);
1862
1863 if (statusp)
1864 {
1865 int i;
1866 AV *status = (AV *)SvRV (*statusp);
1867 EXTEND (SP, AvFILLp (status) + 1);
1868
1869 for (i = 0; i <= AvFILLp (status); ++i)
1870 PUSHs (AvARRAY (status)[i]);
1871 }
1872
1873 PUTBACK;
1874 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1875 }
1876 }
1877}
1878
1879static void
1880slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1881{
1882 int i;
1883 HV *hv = (HV *)SvRV (coro_current);
1884 AV *av = newAV ();
1885
1886 av_extend (av, items - 1);
1887 for (i = 0; i < items; ++i)
1888 av_push (av, SvREFCNT_inc_NN (arg [i]));
1889
1890 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1891
1892 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1893 api_ready (aTHX_ sv_manager);
1894
1895 frame->prepare = prepare_schedule;
1896 frame->check = slf_check_repeat;
1897
1898 /* as a minor optimisation, we could unwind all stacks here */
1899 /* but that puts extra pressure on pp_slf, and is not worth much */
1900 /*coro_unwind_stacks (aTHX);*/
1901}
1902
1903/*****************************************************************************/
1904/* async pool handler */
1905
1906static int
1907slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1908{
1909 HV *hv = (HV *)SvRV (coro_current);
1910 struct coro *coro = (struct coro *)frame->data;
1911
1912 if (!coro->invoke_cb)
1913 return 1; /* loop till we have invoke */
1914 else
1915 {
1916 hv_store (hv, "desc", sizeof ("desc") - 1,
1917 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1918
1919 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1920
1921 {
1922 dSP;
1923 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1924 PUTBACK;
1925 }
1926
1927 SvREFCNT_dec (GvAV (PL_defgv));
1928 GvAV (PL_defgv) = coro->invoke_av;
1929 coro->invoke_av = 0;
1930
1931 return 0;
1932 }
1933}
1934
1935static void
1936slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1937{
1938 HV *hv = (HV *)SvRV (coro_current);
1939 struct coro *coro = SvSTATE_hv ((SV *)hv);
1940
1941 if (expect_true (coro->saved_deffh))
1942 {
1943 /* subsequent iteration */
1944 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1945 coro->saved_deffh = 0;
1946
1947 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1948 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1949 {
1950 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1951 coro->invoke_av = newAV ();
1952
1953 frame->prepare = prepare_nop;
1954 }
1955 else
1956 {
1957 av_clear (GvAV (PL_defgv));
1958 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1959
1960 coro->prio = 0;
1961
1962 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1963 api_trace (aTHX_ coro_current, 0);
1964
1965 frame->prepare = prepare_schedule;
1966 av_push (av_async_pool, SvREFCNT_inc (hv));
1967 }
1968 }
1969 else
1970 {
1971 /* first iteration, simply fall through */
1972 frame->prepare = prepare_nop;
1973 }
1974
1975 frame->check = slf_check_pool_handler;
1976 frame->data = (void *)coro;
1977}
1978
1979/*****************************************************************************/
1980/* rouse callback */
1981
1982#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1983
1984static void
1985coro_rouse_callback (pTHX_ CV *cv)
1986{
1987 dXSARGS;
1988 SV *data = (SV *)GENSUB_ARG;
1989
1990 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1991 {
1992 /* first call, set args */
1993 AV *av = newAV ();
1994 SV *coro = SvRV (data);
1995
1996 SvRV_set (data, (SV *)av);
1997 api_ready (aTHX_ coro);
1998 SvREFCNT_dec (coro);
1999
2000 /* better take a full copy of the arguments */
2001 while (items--)
2002 av_store (av, items, newSVsv (ST (items)));
2003 }
2004
2005 XSRETURN_EMPTY;
2006}
2007
2008static int
2009slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2010{
2011 SV *data = (SV *)frame->data;
2012
2013 if (CORO_THROW)
2014 return 0;
2015
2016 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2017 return 1;
2018
2019 /* now push all results on the stack */
2020 {
2021 dSP;
2022 AV *av = (AV *)SvRV (data);
2023 int i;
2024
2025 EXTEND (SP, AvFILLp (av) + 1);
2026 for (i = 0; i <= AvFILLp (av); ++i)
2027 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2028
2029 /* we have stolen the elements, so ste length to zero and free */
2030 AvFILLp (av) = -1;
2031 av_undef (av);
2032
2033 PUTBACK;
2034 }
2035
2036 return 0;
2037}
2038
2039static void
2040slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2041{
2042 SV *cb;
2043
2044 if (items)
2045 cb = arg [0];
2046 else
2047 {
2048 struct coro *coro = SvSTATE_current;
2049
2050 if (!coro->rouse_cb)
2051 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2052
2053 cb = sv_2mortal (coro->rouse_cb);
2054 coro->rouse_cb = 0;
2055 }
2056
2057 if (!SvROK (cb)
2058 || SvTYPE (SvRV (cb)) != SVt_PVCV
2059 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2060 croak ("Coro::rouse_wait called with illegal callback argument,");
2061
2062 {
2063 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2064 SV *data = (SV *)GENSUB_ARG;
2065
2066 frame->data = (void *)data;
2067 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2068 frame->check = slf_check_rouse_wait;
2069 }
2070}
2071
2072static SV *
2073coro_new_rouse_cb (pTHX)
2074{
2075 HV *hv = (HV *)SvRV (coro_current);
2076 struct coro *coro = SvSTATE_hv (hv);
2077 SV *data = newRV_inc ((SV *)hv);
2078 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2079
2080 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2081 SvREFCNT_dec (data); /* magicext increases the refcount */
2082
2083 SvREFCNT_dec (coro->rouse_cb);
2084 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2085
2086 return cb;
2087}
2088
2089/*****************************************************************************/
2090/* schedule-like-function opcode (SLF) */
2091
2092static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2093static const CV *slf_cv;
2094static SV **slf_argv;
2095static int slf_argc, slf_arga; /* count, allocated */
2096static I32 slf_ax; /* top of stack, for restore */
2097
2098/* this restores the stack in the case we patched the entersub, to */
2099/* recreate the stack frame as perl will on following calls */
2100/* since entersub cleared the stack */
2101static OP *
2102pp_restore (pTHX)
2103{
2104 int i;
2105 SV **SP = PL_stack_base + slf_ax;
2106
2107 PUSHMARK (SP);
2108
2109 EXTEND (SP, slf_argc + 1);
2110
2111 for (i = 0; i < slf_argc; ++i)
2112 PUSHs (sv_2mortal (slf_argv [i]));
2113
2114 PUSHs ((SV *)CvGV (slf_cv));
2115
2116 RETURNOP (slf_restore.op_first);
2117}
2118
2119static void
2120slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2121{
2122 SV **arg = (SV **)slf_frame.data;
2123
2124 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2125}
2126
2127static void
2128slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2129{
2130 if (items != 2)
2131 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2132
2133 frame->prepare = slf_prepare_transfer;
2134 frame->check = slf_check_nop;
2135 frame->data = (void *)arg; /* let's hope it will stay valid */
2136}
2137
2138static void
2139slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2140{
2141 frame->prepare = prepare_schedule;
2142 frame->check = slf_check_nop;
2143}
2144
2145static void
2146slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2147{
2148 struct coro *next = (struct coro *)slf_frame.data;
2149
2150 SvREFCNT_inc_NN (next->hv);
2151 prepare_schedule_to (aTHX_ ta, next);
2152}
2153
2154static void
2155slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 if (!items)
2158 croak ("Coro::schedule_to expects a coroutine argument, caught");
2159
2160 frame->data = (void *)SvSTATE (arg [0]);
2161 frame->prepare = slf_prepare_schedule_to;
2162 frame->check = slf_check_nop;
2163}
2164
2165static void
2166slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2167{
2168 api_ready (aTHX_ SvRV (coro_current));
2169
2170 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2171}
2172
2173static void
2174slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2175{
2176 frame->prepare = prepare_cede;
2177 frame->check = slf_check_nop;
2178}
2179
2180static void
2181slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2182{
2183 frame->prepare = prepare_cede_notself;
2184 frame->check = slf_check_nop;
2185}
2186
2187/*
2188 * these not obviously related functions are all rolled into one
2189 * function to increase chances that they all will call transfer with the same
2190 * stack offset
2191 * SLF stands for "schedule-like-function".
2192 */
2193static OP *
2194pp_slf (pTHX)
2195{
2196 I32 checkmark; /* mark SP to see how many elements check has pushed */
2197
2198 /* set up the slf frame, unless it has already been set-up */
2199 /* the latter happens when a new coro has been started */
2200 /* or when a new cctx was attached to an existing coroutine */
2201 if (expect_true (!slf_frame.prepare))
2202 {
2203 /* first iteration */
2204 dSP;
2205 SV **arg = PL_stack_base + TOPMARK + 1;
2206 int items = SP - arg; /* args without function object */
2207 SV *gv = *sp;
2208
2209 /* do a quick consistency check on the "function" object, and if it isn't */
2210 /* for us, divert to the real entersub */
2211 if (SvTYPE (gv) != SVt_PVGV
2212 || !GvCV (gv)
2213 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2214 return PL_ppaddr[OP_ENTERSUB](aTHX);
2215
2216 if (!(PL_op->op_flags & OPf_STACKED))
2217 {
2218 /* ampersand-form of call, use @_ instead of stack */
2219 AV *av = GvAV (PL_defgv);
2220 arg = AvARRAY (av);
2221 items = AvFILLp (av) + 1;
2222 }
2223
2224 /* now call the init function, which needs to set up slf_frame */
2225 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2226 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2227
2228 /* pop args */
2229 SP = PL_stack_base + POPMARK;
2230
2231 PUTBACK;
2232 }
2233
2234 /* now that we have a slf_frame, interpret it! */
2235 /* we use a callback system not to make the code needlessly */
2236 /* complicated, but so we can run multiple perl coros from one cctx */
2237
2238 do
2239 {
2240 struct coro_transfer_args ta;
2241
2242 slf_frame.prepare (aTHX_ &ta);
2243 TRANSFER (ta, 0);
2244
2245 checkmark = PL_stack_sp - PL_stack_base;
2246 }
2247 while (slf_frame.check (aTHX_ &slf_frame));
2248
2249 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2250
2251 /* exception handling */
2252 if (expect_false (CORO_THROW))
2253 {
2254 SV *exception = sv_2mortal (CORO_THROW);
2255
2256 CORO_THROW = 0;
2257 sv_setsv (ERRSV, exception);
2258 croak (0);
2259 }
2260
2261 /* return value handling - mostly like entersub */
2262 /* make sure we put something on the stack in scalar context */
2263 if (GIMME_V == G_SCALAR)
2264 {
2265 dSP;
2266 SV **bot = PL_stack_base + checkmark;
2267
2268 if (sp == bot) /* too few, push undef */
2269 bot [1] = &PL_sv_undef;
2270 else if (sp != bot + 1) /* too many, take last one */
2271 bot [1] = *sp;
2272
2273 SP = bot + 1;
2274
2275 PUTBACK;
2276 }
2277
2278 return NORMAL;
2279}
2280
2281static void
2282api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2283{
2284 int i;
2285 SV **arg = PL_stack_base + ax;
2286 int items = PL_stack_sp - arg + 1;
2287
2288 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2289
2290 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2291 && PL_op->op_ppaddr != pp_slf)
2292 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2293
2294 CvFLAGS (cv) |= CVf_SLF;
2295 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2296 slf_cv = cv;
2297
2298 /* we patch the op, and then re-run the whole call */
2299 /* we have to put the same argument on the stack for this to work */
2300 /* and this will be done by pp_restore */
2301 slf_restore.op_next = (OP *)&slf_restore;
2302 slf_restore.op_type = OP_CUSTOM;
2303 slf_restore.op_ppaddr = pp_restore;
2304 slf_restore.op_first = PL_op;
2305
2306 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2307
2308 if (PL_op->op_flags & OPf_STACKED)
2309 {
2310 if (items > slf_arga)
2311 {
2312 slf_arga = items;
2313 free (slf_argv);
2314 slf_argv = malloc (slf_arga * sizeof (SV *));
2315 }
2316
2317 slf_argc = items;
2318
2319 for (i = 0; i < items; ++i)
2320 slf_argv [i] = SvREFCNT_inc (arg [i]);
2321 }
2322 else
2323 slf_argc = 0;
2324
2325 PL_op->op_ppaddr = pp_slf;
2326 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2327
2328 PL_op = (OP *)&slf_restore;
2329}
2330
2331/*****************************************************************************/
2332/* dynamic wind */
2333
2334static void
2335on_enterleave_call (pTHX_ SV *cb)
2336{
2337 dSP;
2338
2339 PUSHSTACK;
2340
2341 PUSHMARK (SP);
2342 PUTBACK;
2343 call_sv (cb, G_VOID | G_DISCARD);
2344 SPAGAIN;
2345
2346 POPSTACK;
2347}
2348
2349static SV *
2350coro_avp_pop_and_free (pTHX_ AV **avp)
2351{
2352 AV *av = *avp;
2353 SV *res = av_pop (av);
2354
2355 if (AvFILLp (av) < 0)
2356 {
2357 *avp = 0;
2358 SvREFCNT_dec (av);
2359 }
2360
2361 return res;
2362}
2363
2364static void
2365coro_pop_on_enter (pTHX_ void *coro)
2366{
2367 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2368 SvREFCNT_dec (cb);
2369}
2370
2371static void
2372coro_pop_on_leave (pTHX_ void *coro)
2373{
2374 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2375 on_enterleave_call (aTHX_ sv_2mortal (cb));
2376}
2377
2378/*****************************************************************************/
2379/* PerlIO::cede */
2380
2381typedef struct
2382{
2383 PerlIOBuf base;
2384 NV next, every;
2385} PerlIOCede;
2386
2387static IV
2388PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2389{
2390 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2391
2392 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2393 self->next = nvtime () + self->every;
2394
2395 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2396}
2397
2398static SV *
2399PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2400{
2401 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2402
2403 return newSVnv (self->every);
2404}
2405
2406static IV
2407PerlIOCede_flush (pTHX_ PerlIO *f)
2408{
2409 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2410 double now = nvtime ();
2411
2412 if (now >= self->next)
2413 {
2414 api_cede (aTHX);
2415 self->next = now + self->every;
2416 }
2417
2418 return PerlIOBuf_flush (aTHX_ f);
2419}
2420
2421static PerlIO_funcs PerlIO_cede =
2422{
2423 sizeof(PerlIO_funcs),
2424 "cede",
2425 sizeof(PerlIOCede),
2426 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2427 PerlIOCede_pushed,
2428 PerlIOBuf_popped,
2429 PerlIOBuf_open,
2430 PerlIOBase_binmode,
2431 PerlIOCede_getarg,
2432 PerlIOBase_fileno,
2433 PerlIOBuf_dup,
2434 PerlIOBuf_read,
2435 PerlIOBuf_unread,
2436 PerlIOBuf_write,
2437 PerlIOBuf_seek,
2438 PerlIOBuf_tell,
2439 PerlIOBuf_close,
2440 PerlIOCede_flush,
2441 PerlIOBuf_fill,
2442 PerlIOBase_eof,
2443 PerlIOBase_error,
2444 PerlIOBase_clearerr,
2445 PerlIOBase_setlinebuf,
2446 PerlIOBuf_get_base,
2447 PerlIOBuf_bufsiz,
2448 PerlIOBuf_get_ptr,
2449 PerlIOBuf_get_cnt,
2450 PerlIOBuf_set_ptrcnt,
2451};
2452
2453/*****************************************************************************/
2454/* Coro::Semaphore & Coro::Signal */
2455
2456static SV *
2457coro_waitarray_new (pTHX_ int count)
2458{
2459 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2460 AV *av = newAV ();
2461 SV **ary;
2462
2463 /* unfortunately, building manually saves memory */
2464 Newx (ary, 2, SV *);
2465 AvALLOC (av) = ary;
2466#if PERL_VERSION_ATLEAST (5,10,0)
2467 AvARRAY (av) = ary;
2468#else
2469 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2470 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2471 SvPVX ((SV *)av) = (char *)ary;
2472#endif
2473 AvMAX (av) = 1;
2474 AvFILLp (av) = 0;
2475 ary [0] = newSViv (count);
2476
2477 return newRV_noinc ((SV *)av);
2478}
2479
2480/* semaphore */
2481
2482static void
2483coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2484{
2485 SV *count_sv = AvARRAY (av)[0];
2486 IV count = SvIVX (count_sv);
2487
2488 count += adjust;
2489 SvIVX (count_sv) = count;
2490
2491 /* now wake up as many waiters as are expected to lock */
2492 while (count > 0 && AvFILLp (av) > 0)
2493 {
2494 SV *cb;
2495
2496 /* swap first two elements so we can shift a waiter */
2497 AvARRAY (av)[0] = AvARRAY (av)[1];
2498 AvARRAY (av)[1] = count_sv;
2499 cb = av_shift (av);
2500
2501 if (SvOBJECT (cb))
2502 {
2503 api_ready (aTHX_ cb);
2504 --count;
2505 }
2506 else if (SvTYPE (cb) == SVt_PVCV)
2507 {
2508 dSP;
2509 PUSHMARK (SP);
2510 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2511 PUTBACK;
2512 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2513 }
2514
2515 SvREFCNT_dec (cb);
2516 }
2517}
2518
2519static void
2520coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2521{
2522 /* call $sem->adjust (0) to possibly wake up some other waiters */
2523 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2524}
2525
2526static int
2527slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2528{
2529 AV *av = (AV *)frame->data;
2530 SV *count_sv = AvARRAY (av)[0];
2531
2532 /* if we are about to throw, don't actually acquire the lock, just throw */
2533 if (CORO_THROW)
2534 return 0;
2535 else if (SvIVX (count_sv) > 0)
2536 {
2537 SvSTATE_current->on_destroy = 0;
2538
2539 if (acquire)
2540 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2541 else
2542 coro_semaphore_adjust (aTHX_ av, 0);
2543
2544 return 0;
2545 }
2546 else
2547 {
2548 int i;
2549 /* if we were woken up but can't down, we look through the whole */
2550 /* waiters list and only add us if we aren't in there already */
2551 /* this avoids some degenerate memory usage cases */
2552
2553 for (i = 1; i <= AvFILLp (av); ++i)
2554 if (AvARRAY (av)[i] == SvRV (coro_current))
2555 return 1;
2556
2557 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2558 return 1;
2559 }
2560}
2561
2562static int
2563slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2564{
2565 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2566}
2567
2568static int
2569slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2570{
2571 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2572}
2573
2574static void
2575slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2576{
2577 AV *av = (AV *)SvRV (arg [0]);
2578
2579 if (SvIVX (AvARRAY (av)[0]) > 0)
2580 {
2581 frame->data = (void *)av;
2582 frame->prepare = prepare_nop;
2583 }
2584 else
2585 {
2586 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2587
2588 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2589 frame->prepare = prepare_schedule;
2590
2591 /* to avoid race conditions when a woken-up coro gets terminated */
2592 /* we arrange for a temporary on_destroy that calls adjust (0) */
2593 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2594 }
2595}
2596
2597static void
2598slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2599{
2600 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2601 frame->check = slf_check_semaphore_down;
2602}
2603
2604static void
2605slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2606{
2607 if (items >= 2)
2608 {
2609 /* callback form */
2610 AV *av = (AV *)SvRV (arg [0]);
2611 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2612
2613 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2614
2615 if (SvIVX (AvARRAY (av)[0]) > 0)
2616 coro_semaphore_adjust (aTHX_ av, 0);
2617
2618 frame->prepare = prepare_nop;
2619 frame->check = slf_check_nop;
2620 }
2621 else
2622 {
2623 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2624 frame->check = slf_check_semaphore_wait;
2625 }
2626}
2627
2628/* signal */
2629
2630static void
2631coro_signal_wake (pTHX_ AV *av, int count)
2632{
2633 SvIVX (AvARRAY (av)[0]) = 0;
2634
2635 /* now signal count waiters */
2636 while (count > 0 && AvFILLp (av) > 0)
2637 {
2638 SV *cb;
2639
2640 /* swap first two elements so we can shift a waiter */
2641 cb = AvARRAY (av)[0];
2642 AvARRAY (av)[0] = AvARRAY (av)[1];
2643 AvARRAY (av)[1] = cb;
2644
2645 cb = av_shift (av);
2646
2647 api_ready (aTHX_ cb);
2648 sv_setiv (cb, 0); /* signal waiter */
2649 SvREFCNT_dec (cb);
2650
2651 --count;
2652 }
2653}
2654
2655static int
2656slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2657{
2658 /* if we are about to throw, also stop waiting */
2659 return SvROK ((SV *)frame->data) && !CORO_THROW;
2660}
2661
2662static void
2663slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2664{
2665 AV *av = (AV *)SvRV (arg [0]);
2666
2667 if (SvIVX (AvARRAY (av)[0]))
2668 {
2669 SvIVX (AvARRAY (av)[0]) = 0;
2670 frame->prepare = prepare_nop;
2671 frame->check = slf_check_nop;
2672 }
2673 else
2674 {
2675 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2676
2677 av_push (av, waiter);
2678
2679 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2680 frame->prepare = prepare_schedule;
2681 frame->check = slf_check_signal_wait;
2682 }
2683}
2684
2685/*****************************************************************************/
2686/* Coro::AIO */
2687
2688#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2689
2690/* helper storage struct */
2691struct io_state
2692{
2693 int errorno;
2694 I32 laststype; /* U16 in 5.10.0 */
2695 int laststatval;
2696 Stat_t statcache;
2697};
2698
2699static void
2700coro_aio_callback (pTHX_ CV *cv)
2701{
2702 dXSARGS;
2703 AV *state = (AV *)GENSUB_ARG;
2704 SV *coro = av_pop (state);
2705 SV *data_sv = newSV (sizeof (struct io_state));
2706
2707 av_extend (state, items - 1);
2708
2709 sv_upgrade (data_sv, SVt_PV);
2710 SvCUR_set (data_sv, sizeof (struct io_state));
2711 SvPOK_only (data_sv);
2712
2713 {
2714 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2715
2716 data->errorno = errno;
2717 data->laststype = PL_laststype;
2718 data->laststatval = PL_laststatval;
2719 data->statcache = PL_statcache;
2720 }
2721
2722 /* now build the result vector out of all the parameters and the data_sv */
2723 {
2724 int i;
2725
2726 for (i = 0; i < items; ++i)
2727 av_push (state, SvREFCNT_inc_NN (ST (i)));
2728 }
2729
2730 av_push (state, data_sv);
2731
2732 api_ready (aTHX_ coro);
2733 SvREFCNT_dec (coro);
2734 SvREFCNT_dec ((AV *)state);
2735}
2736
2737static int
2738slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2739{
2740 AV *state = (AV *)frame->data;
2741
2742 /* if we are about to throw, return early */
2743 /* this does not cancel the aio request, but at least */
2744 /* it quickly returns */
2745 if (CORO_THROW)
2746 return 0;
2747
2748 /* one element that is an RV? repeat! */
2749 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2750 return 1;
2751
2752 /* restore status */
2753 {
2754 SV *data_sv = av_pop (state);
2755 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2756
2757 errno = data->errorno;
2758 PL_laststype = data->laststype;
2759 PL_laststatval = data->laststatval;
2760 PL_statcache = data->statcache;
2761
2762 SvREFCNT_dec (data_sv);
2763 }
2764
2765 /* push result values */
2766 {
2767 dSP;
2768 int i;
2769
2770 EXTEND (SP, AvFILLp (state) + 1);
2771 for (i = 0; i <= AvFILLp (state); ++i)
2772 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2773
2774 PUTBACK;
2775 }
2776
2777 return 0;
2778}
2779
2780static void
2781slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2782{
2783 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2784 SV *coro_hv = SvRV (coro_current);
2785 struct coro *coro = SvSTATE_hv (coro_hv);
2786
2787 /* put our coroutine id on the state arg */
2788 av_push (state, SvREFCNT_inc_NN (coro_hv));
2789
2790 /* first see whether we have a non-zero priority and set it as AIO prio */
2791 if (coro->prio)
2792 {
2793 dSP;
2794
2795 static SV *prio_cv;
2796 static SV *prio_sv;
2797
2798 if (expect_false (!prio_cv))
2799 {
2800 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2801 prio_sv = newSViv (0);
2802 }
2803
2804 PUSHMARK (SP);
2805 sv_setiv (prio_sv, coro->prio);
2806 XPUSHs (prio_sv);
2807
2808 PUTBACK;
2809 call_sv (prio_cv, G_VOID | G_DISCARD);
2810 }
2811
2812 /* now call the original request */
2813 {
2814 dSP;
2815 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2816 int i;
2817
2818 PUSHMARK (SP);
2819
2820 /* first push all args to the stack */
2821 EXTEND (SP, items + 1);
2822
2823 for (i = 0; i < items; ++i)
2824 PUSHs (arg [i]);
2825
2826 /* now push the callback closure */
2827 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2828
2829 /* now call the AIO function - we assume our request is uncancelable */
2830 PUTBACK;
2831 call_sv ((SV *)req, G_VOID | G_DISCARD);
2832 }
2833
2834 /* now that the requets is going, we loop toll we have a result */
2835 frame->data = (void *)state;
2836 frame->prepare = prepare_schedule;
2837 frame->check = slf_check_aio_req;
2838}
2839
2840static void
2841coro_aio_req_xs (pTHX_ CV *cv)
2842{
2843 dXSARGS;
2844
2845 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2846
2847 XSRETURN_EMPTY;
2848}
2849
2850/*****************************************************************************/
2851
2852#if CORO_CLONE
2853# include "clone.c"
2854#endif
2855
1497MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2856MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1498 2857
1499PROTOTYPES: DISABLE 2858PROTOTYPES: DISABLE
1500 2859
1501BOOT: 2860BOOT:
1502{ 2861{
1503#ifdef USE_ITHREADS 2862#ifdef USE_ITHREADS
1504 MUTEX_INIT (&coro_mutex); 2863# if CORO_PTHREAD
2864 coro_thx = PERL_GET_CONTEXT;
2865# endif
1505#endif 2866#endif
1506 BOOT_PAGESIZE; 2867 BOOT_PAGESIZE;
2868
2869 cctx_current = cctx_new_empty ();
1507 2870
1508 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2871 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1509 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2872 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1510 2873
2874 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2875 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2876 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2877
1511 hv_sig = coro_get_hv ("SIG", TRUE); 2878 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1512 sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE); 2879 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1513 sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE); 2880 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1514
1515 if (!PL_diehook ) hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0);
1516 if (!PL_warnhook) hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, SvREFCNT_inc (sv_warnhook), 0);
1517 2881
1518 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2882 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1519 2883
1520 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2884 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1521 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2885 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1526 main_top_env = PL_top_env; 2890 main_top_env = PL_top_env;
1527 2891
1528 while (main_top_env->je_prev) 2892 while (main_top_env->je_prev)
1529 main_top_env = main_top_env->je_prev; 2893 main_top_env = main_top_env->je_prev;
1530 2894
2895 {
2896 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2897
2898 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2899 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2900
2901 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2902 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2903 }
2904
1531 coroapi.ver = CORO_API_VERSION; 2905 coroapi.ver = CORO_API_VERSION;
1532 coroapi.rev = CORO_API_REVISION; 2906 coroapi.rev = CORO_API_REVISION;
2907
1533 coroapi.transfer = api_transfer; 2908 coroapi.transfer = api_transfer;
2909
2910 coroapi.sv_state = SvSTATE_;
2911 coroapi.execute_slf = api_execute_slf;
2912 coroapi.prepare_nop = prepare_nop;
2913 coroapi.prepare_schedule = prepare_schedule;
2914 coroapi.prepare_cede = prepare_cede;
2915 coroapi.prepare_cede_notself = prepare_cede_notself;
2916
2917 {
2918 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2919
2920 if (!svp) croak ("Time::HiRes is required");
2921 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2922
2923 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2924 }
1534 2925
1535 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2926 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1536} 2927}
1537 2928
1538SV * 2929SV *
1539new (char *klass, ...) 2930new (char *klass, ...)
2931 ALIAS:
2932 Coro::new = 1
1540 CODE: 2933 CODE:
1541{ 2934{
1542 struct coro *coro; 2935 struct coro *coro;
2936 MAGIC *mg;
1543 HV *hv; 2937 HV *hv;
2938 CV *cb;
1544 int i; 2939 int i;
2940
2941 if (items > 1)
2942 {
2943 cb = coro_sv_2cv (aTHX_ ST (1));
2944
2945 if (!ix)
2946 {
2947 if (CvISXSUB (cb))
2948 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2949
2950 if (!CvROOT (cb))
2951 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2952 }
2953 }
1545 2954
1546 Newz (0, coro, 1, struct coro); 2955 Newz (0, coro, 1, struct coro);
1547 coro->args = newAV (); 2956 coro->args = newAV ();
1548 coro->flags = CF_NEW; 2957 coro->flags = CF_NEW;
1549 2958
1550 if (coro_first) coro_first->prev = coro; 2959 if (coro_first) coro_first->prev = coro;
1551 coro->next = coro_first; 2960 coro->next = coro_first;
1552 coro_first = coro; 2961 coro_first = coro;
1553 2962
1554 coro->hv = hv = newHV (); 2963 coro->hv = hv = newHV ();
1555 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2964 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2965 mg->mg_flags |= MGf_DUP;
1556 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2966 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1557 2967
2968 if (items > 1)
2969 {
1558 av_extend (coro->args, items - 1); 2970 av_extend (coro->args, items - 1 + ix - 1);
2971
2972 if (ix)
2973 {
2974 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2975 cb = cv_coro_run;
2976 }
2977
2978 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2979
1559 for (i = 1; i < items; i++) 2980 for (i = 2; i < items; i++)
1560 av_push (coro->args, newSVsv (ST (i))); 2981 av_push (coro->args, newSVsv (ST (i)));
2982 }
1561} 2983}
1562 OUTPUT: 2984 OUTPUT:
1563 RETVAL 2985 RETVAL
1564 2986
1565# these not obviously related functions are all rolled into the same xs
1566# function to increase chances that they all will call transfer with the same
1567# stack offset
1568void 2987void
1569_set_stacklevel (...) 2988transfer (...)
1570 ALIAS: 2989 PROTOTYPE: $$
1571 Coro::State::transfer = 1 2990 CODE:
1572 Coro::schedule = 2 2991 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1573 Coro::cede = 3
1574 Coro::cede_notself = 4
1575 CODE:
1576{
1577 struct transfer_args ta;
1578
1579 switch (ix)
1580 {
1581 case 0:
1582 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1583 ta.next = 0;
1584 break;
1585
1586 case 1:
1587 if (items != 2)
1588 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1589
1590 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1591 break;
1592
1593 case 2:
1594 prepare_schedule (aTHX_ &ta);
1595 break;
1596
1597 case 3:
1598 prepare_cede (aTHX_ &ta);
1599 break;
1600
1601 case 4:
1602 if (!prepare_cede_notself (aTHX_ &ta))
1603 XSRETURN_EMPTY;
1604
1605 break;
1606 }
1607
1608 BARRIER;
1609 PUTBACK;
1610 TRANSFER (ta);
1611 SPAGAIN; /* might be the sp of a different coroutine now */
1612 /* be extra careful not to ever do anything after TRANSFER */
1613}
1614 2992
1615bool 2993bool
1616_destroy (SV *coro_sv) 2994_destroy (SV *coro_sv)
1617 CODE: 2995 CODE:
1618 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2996 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1619 OUTPUT: 2997 OUTPUT:
1620 RETVAL 2998 RETVAL
1621 2999
1622void 3000void
1623_exit (code) 3001_exit (int code)
1624 int code
1625 PROTOTYPE: $ 3002 PROTOTYPE: $
1626 CODE: 3003 CODE:
1627 _exit (code); 3004 _exit (code);
1628 3005
3006SV *
3007clone (Coro::State coro)
3008 CODE:
3009{
3010#if CORO_CLONE
3011 struct coro *ncoro = coro_clone (aTHX_ coro);
3012 MAGIC *mg;
3013 /* TODO: too much duplication */
3014 ncoro->hv = newHV ();
3015 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3016 mg->mg_flags |= MGf_DUP;
3017 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3018#else
3019 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3020#endif
3021}
3022 OUTPUT:
3023 RETVAL
3024
1629int 3025int
1630cctx_stacksize (int new_stacksize = 0) 3026cctx_stacksize (int new_stacksize = 0)
3027 PROTOTYPE: ;$
1631 CODE: 3028 CODE:
1632 RETVAL = coro_stacksize; 3029 RETVAL = cctx_stacksize;
1633 if (new_stacksize) 3030 if (new_stacksize)
3031 {
1634 coro_stacksize = new_stacksize; 3032 cctx_stacksize = new_stacksize;
3033 ++cctx_gen;
3034 }
1635 OUTPUT: 3035 OUTPUT:
1636 RETVAL 3036 RETVAL
1637 3037
1638int 3038int
3039cctx_max_idle (int max_idle = 0)
3040 PROTOTYPE: ;$
3041 CODE:
3042 RETVAL = cctx_max_idle;
3043 if (max_idle > 1)
3044 cctx_max_idle = max_idle;
3045 OUTPUT:
3046 RETVAL
3047
3048int
1639cctx_count () 3049cctx_count ()
3050 PROTOTYPE:
1640 CODE: 3051 CODE:
1641 RETVAL = cctx_count; 3052 RETVAL = cctx_count;
1642 OUTPUT: 3053 OUTPUT:
1643 RETVAL 3054 RETVAL
1644 3055
1645int 3056int
1646cctx_idle () 3057cctx_idle ()
3058 PROTOTYPE:
1647 CODE: 3059 CODE:
1648 RETVAL = cctx_idle; 3060 RETVAL = cctx_idle;
1649 OUTPUT: 3061 OUTPUT:
1650 RETVAL 3062 RETVAL
1651 3063
1652void 3064void
1653list () 3065list ()
3066 PROTOTYPE:
1654 PPCODE: 3067 PPCODE:
1655{ 3068{
1656 struct coro *coro; 3069 struct coro *coro;
1657 for (coro = coro_first; coro; coro = coro->next) 3070 for (coro = coro_first; coro; coro = coro->next)
1658 if (coro->hv) 3071 if (coro->hv)
… …
1663call (Coro::State coro, SV *coderef) 3076call (Coro::State coro, SV *coderef)
1664 ALIAS: 3077 ALIAS:
1665 eval = 1 3078 eval = 1
1666 CODE: 3079 CODE:
1667{ 3080{
1668 if (coro->mainstack) 3081 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1669 { 3082 {
1670 struct coro temp; 3083 struct coro *current = SvSTATE_current;
1671 3084
1672 if (!(coro->flags & CF_RUNNING)) 3085 if (current != coro)
1673 { 3086 {
3087 PUTBACK;
1674 save_perl (aTHX_ &temp); 3088 save_perl (aTHX_ current);
1675 load_perl (aTHX_ coro); 3089 load_perl (aTHX_ coro);
3090 SPAGAIN;
1676 } 3091 }
1677 3092
1678 {
1679 dSP;
1680 ENTER;
1681 SAVETMPS;
1682 PUTBACK;
1683 PUSHSTACK; 3093 PUSHSTACK;
3094
1684 PUSHMARK (SP); 3095 PUSHMARK (SP);
3096 PUTBACK;
1685 3097
1686 if (ix) 3098 if (ix)
1687 eval_sv (coderef, 0); 3099 eval_sv (coderef, 0);
1688 else 3100 else
1689 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3101 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1690 3102
1691 POPSTACK; 3103 POPSTACK;
1692 SPAGAIN; 3104 SPAGAIN;
1693 FREETMPS;
1694 LEAVE;
1695 PUTBACK;
1696 }
1697 3105
1698 if (!(coro->flags & CF_RUNNING)) 3106 if (current != coro)
1699 { 3107 {
3108 PUTBACK;
1700 save_perl (aTHX_ coro); 3109 save_perl (aTHX_ coro);
1701 load_perl (aTHX_ &temp); 3110 load_perl (aTHX_ current);
3111 SPAGAIN;
1702 } 3112 }
1703 } 3113 }
1704} 3114}
1705 3115
1706SV * 3116SV *
… …
1709 ALIAS: 3119 ALIAS:
1710 is_ready = CF_READY 3120 is_ready = CF_READY
1711 is_running = CF_RUNNING 3121 is_running = CF_RUNNING
1712 is_new = CF_NEW 3122 is_new = CF_NEW
1713 is_destroyed = CF_DESTROYED 3123 is_destroyed = CF_DESTROYED
3124 is_suspended = CF_SUSPENDED
1714 CODE: 3125 CODE:
1715 RETVAL = boolSV (coro->flags & ix); 3126 RETVAL = boolSV (coro->flags & ix);
1716 OUTPUT: 3127 OUTPUT:
1717 RETVAL 3128 RETVAL
1718 3129
1719void 3130void
3131throw (Coro::State self, SV *throw = &PL_sv_undef)
3132 PROTOTYPE: $;$
3133 CODE:
3134{
3135 struct coro *current = SvSTATE_current;
3136 SV **throwp = self == current ? &CORO_THROW : &self->except;
3137 SvREFCNT_dec (*throwp);
3138 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3139}
3140
3141void
1720api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3142api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3143 PROTOTYPE: $;$
3144 C_ARGS: aTHX_ coro, flags
1721 3145
1722SV * 3146SV *
1723has_stack (Coro::State coro) 3147has_cctx (Coro::State coro)
1724 PROTOTYPE: $ 3148 PROTOTYPE: $
1725 CODE: 3149 CODE:
1726 RETVAL = boolSV (!!coro->cctx); 3150 /* maybe manage the running flag differently */
3151 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1727 OUTPUT: 3152 OUTPUT:
1728 RETVAL 3153 RETVAL
1729 3154
1730int 3155int
1731is_traced (Coro::State coro) 3156is_traced (Coro::State coro)
… …
1733 CODE: 3158 CODE:
1734 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3159 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1735 OUTPUT: 3160 OUTPUT:
1736 RETVAL 3161 RETVAL
1737 3162
1738IV 3163UV
1739rss (Coro::State coro) 3164rss (Coro::State coro)
1740 PROTOTYPE: $ 3165 PROTOTYPE: $
1741 ALIAS: 3166 ALIAS:
1742 usecount = 1 3167 usecount = 1
1743 CODE: 3168 CODE:
… …
1747 case 1: RETVAL = coro->usecount; break; 3172 case 1: RETVAL = coro->usecount; break;
1748 } 3173 }
1749 OUTPUT: 3174 OUTPUT:
1750 RETVAL 3175 RETVAL
1751 3176
3177void
3178force_cctx ()
3179 PROTOTYPE:
3180 CODE:
3181 cctx_current->idle_sp = 0;
3182
3183void
3184swap_defsv (Coro::State self)
3185 PROTOTYPE: $
3186 ALIAS:
3187 swap_defav = 1
3188 CODE:
3189 if (!self->slot)
3190 croak ("cannot swap state with coroutine that has no saved state,");
3191 else
3192 {
3193 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3194 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3195
3196 SV *tmp = *src; *src = *dst; *dst = tmp;
3197 }
3198
3199void
3200cancel (Coro::State self)
3201 CODE:
3202 coro_state_destroy (aTHX_ self);
3203 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3204
1752 3205
1753MODULE = Coro::State PACKAGE = Coro 3206MODULE = Coro::State PACKAGE = Coro
1754 3207
1755BOOT: 3208BOOT:
1756{ 3209{
1757 int i; 3210 int i;
1758 3211
1759 sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE); 3212 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1760 sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE); 3213 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3214 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3215 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3216 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1761 av_async_pool = coro_get_av ("Coro::async_pool", TRUE); 3217 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3218 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3219 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3220 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1762 3221
1763 coro_current = coro_get_sv ("Coro::current", FALSE); 3222 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1764 SvREADONLY_on (coro_current); 3223 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3224 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3225 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1765 3226
1766 coro_stash = gv_stashpv ("Coro", TRUE); 3227 coro_stash = gv_stashpv ("Coro", TRUE);
1767 3228
1768 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3229 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1769 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3230 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1774 3235
1775 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3236 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1776 coro_ready[i] = newAV (); 3237 coro_ready[i] = newAV ();
1777 3238
1778 { 3239 {
1779 SV *sv = perl_get_sv ("Coro::API", TRUE); 3240 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1780 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1781 3241
1782 coroapi.schedule = api_schedule; 3242 coroapi.schedule = api_schedule;
3243 coroapi.schedule_to = api_schedule_to;
1783 coroapi.cede = api_cede; 3244 coroapi.cede = api_cede;
1784 coroapi.cede_notself = api_cede_notself; 3245 coroapi.cede_notself = api_cede_notself;
1785 coroapi.ready = api_ready; 3246 coroapi.ready = api_ready;
1786 coroapi.is_ready = api_is_ready; 3247 coroapi.is_ready = api_is_ready;
1787 coroapi.nready = &coro_nready; 3248 coroapi.nready = coro_nready;
1788 coroapi.current = coro_current; 3249 coroapi.current = coro_current;
1789 3250
1790 GCoroAPI = &coroapi; 3251 /*GCoroAPI = &coroapi;*/
1791 sv_setiv (sv, (IV)&coroapi); 3252 sv_setiv (sv, (IV)&coroapi);
1792 SvREADONLY_on (sv); 3253 SvREADONLY_on (sv);
1793 } 3254 }
1794} 3255}
3256
3257void
3258terminate (...)
3259 CODE:
3260 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3261
3262void
3263schedule (...)
3264 CODE:
3265 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3266
3267void
3268schedule_to (...)
3269 CODE:
3270 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3271
3272void
3273cede_to (...)
3274 CODE:
3275 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3276
3277void
3278cede (...)
3279 CODE:
3280 CORO_EXECUTE_SLF_XS (slf_init_cede);
3281
3282void
3283cede_notself (...)
3284 CODE:
3285 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1795 3286
1796void 3287void
1797_set_current (SV *current) 3288_set_current (SV *current)
1798 PROTOTYPE: $ 3289 PROTOTYPE: $
1799 CODE: 3290 CODE:
1800 SvREFCNT_dec (SvRV (coro_current)); 3291 SvREFCNT_dec (SvRV (coro_current));
1801 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3292 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3293
3294void
3295_set_readyhook (SV *hook)
3296 PROTOTYPE: $
3297 CODE:
3298 SvREFCNT_dec (coro_readyhook);
3299 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1802 3300
1803int 3301int
1804prio (Coro::State coro, int newprio = 0) 3302prio (Coro::State coro, int newprio = 0)
3303 PROTOTYPE: $;$
1805 ALIAS: 3304 ALIAS:
1806 nice = 1 3305 nice = 1
1807 CODE: 3306 CODE:
1808{ 3307{
1809 RETVAL = coro->prio; 3308 RETVAL = coro->prio;
… …
1824 3323
1825SV * 3324SV *
1826ready (SV *self) 3325ready (SV *self)
1827 PROTOTYPE: $ 3326 PROTOTYPE: $
1828 CODE: 3327 CODE:
1829 RETVAL = boolSV (api_ready (self)); 3328 RETVAL = boolSV (api_ready (aTHX_ self));
1830 OUTPUT: 3329 OUTPUT:
1831 RETVAL 3330 RETVAL
1832 3331
1833int 3332int
1834nready (...) 3333nready (...)
… …
1837 RETVAL = coro_nready; 3336 RETVAL = coro_nready;
1838 OUTPUT: 3337 OUTPUT:
1839 RETVAL 3338 RETVAL
1840 3339
1841void 3340void
1842throw (Coro::State self, SV *throw = &PL_sv_undef) 3341_pool_handler (...)
1843 PROTOTYPE: $;$ 3342 CODE:
1844 CODE: 3343 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1845 SvREFCNT_dec (self->throw);
1846 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1847 3344
1848# for async_pool speedup
1849void 3345void
1850_pool_1 (SV *cb) 3346async_pool (SV *cv, ...)
3347 PROTOTYPE: &@
3348 PPCODE:
3349{
3350 HV *hv = (HV *)av_pop (av_async_pool);
3351 AV *av = newAV ();
3352 SV *cb = ST (0);
3353 int i;
3354
3355 av_extend (av, items - 2);
3356 for (i = 1; i < items; ++i)
3357 av_push (av, SvREFCNT_inc_NN (ST (i)));
3358
3359 if ((SV *)hv == &PL_sv_undef)
3360 {
3361 PUSHMARK (SP);
3362 EXTEND (SP, 2);
3363 PUSHs (sv_Coro);
3364 PUSHs ((SV *)cv_pool_handler);
3365 PUTBACK;
3366 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3367 SPAGAIN;
3368
3369 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3370 }
3371
3372 {
3373 struct coro *coro = SvSTATE_hv (hv);
3374
3375 assert (!coro->invoke_cb);
3376 assert (!coro->invoke_av);
3377 coro->invoke_cb = SvREFCNT_inc (cb);
3378 coro->invoke_av = av;
3379 }
3380
3381 api_ready (aTHX_ (SV *)hv);
3382
3383 if (GIMME_V != G_VOID)
3384 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3385 else
3386 SvREFCNT_dec (hv);
3387}
3388
3389SV *
3390rouse_cb ()
3391 PROTOTYPE:
1851 CODE: 3392 CODE:
1852{ 3393 RETVAL = coro_new_rouse_cb (aTHX);
1853 struct coro *coro = SvSTATE (coro_current);
1854 HV *hv = (HV *)SvRV (coro_current);
1855 AV *defav = GvAV (PL_defgv);
1856 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1857 AV *invoke_av;
1858 int i, len;
1859
1860 if (!invoke)
1861 croak ("\3async_pool terminate\2\n");
1862
1863 SvREFCNT_dec (coro->saved_deffh);
1864 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1865
1866 hv_store (hv, "desc", sizeof ("desc") - 1,
1867 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1868
1869 invoke_av = (AV *)SvRV (invoke);
1870 len = av_len (invoke_av);
1871
1872 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1873
1874 if (len > 0)
1875 {
1876 av_fill (defav, len - 1);
1877 for (i = 0; i < len; ++i)
1878 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1879 }
1880
1881 SvREFCNT_dec (invoke);
1882}
1883
1884void
1885_pool_2 (SV *cb)
1886 CODE:
1887{
1888 struct coro *coro = SvSTATE (coro_current);
1889
1890 sv_setsv (cb, &PL_sv_undef);
1891
1892 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1893 coro->saved_deffh = 0;
1894
1895 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1896 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1897 croak ("\3async_pool terminate\2\n");
1898
1899 av_clear (GvAV (PL_defgv));
1900 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1901 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1902
1903 coro->prio = 0;
1904
1905 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1906 api_trace (coro_current, 0);
1907
1908 av_push (av_async_pool, newSVsv (coro_current));
1909}
1910
1911
1912MODULE = Coro::State PACKAGE = Coro::AIO
1913
1914SV *
1915_get_state ()
1916 CODE:
1917{
1918 struct io_state *data;
1919
1920 RETVAL = newSV (sizeof (struct io_state));
1921 data = (struct io_state *)SvPVX (RETVAL);
1922 SvCUR_set (RETVAL, sizeof (struct io_state));
1923 SvPOK_only (RETVAL);
1924
1925 data->errorno = errno;
1926 data->laststype = PL_laststype;
1927 data->laststatval = PL_laststatval;
1928 data->statcache = PL_statcache;
1929}
1930 OUTPUT: 3394 OUTPUT:
1931 RETVAL 3395 RETVAL
1932 3396
1933void 3397void
1934_set_state (char *data_) 3398rouse_wait (...)
3399 PROTOTYPE: ;$
3400 PPCODE:
3401 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3402
3403void
3404on_enter (SV *block)
3405 ALIAS:
3406 on_leave = 1
1935 PROTOTYPE: $ 3407 PROTOTYPE: &
1936 CODE: 3408 CODE:
1937{ 3409{
1938 struct io_state *data = (void *)data_; 3410 struct coro *coro = SvSTATE_current;
3411 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1939 3412
1940 errno = data->errorno; 3413 block = (SV *)coro_sv_2cv (aTHX_ block);
1941 PL_laststype = data->laststype;
1942 PL_laststatval = data->laststatval;
1943 PL_statcache = data->statcache;
1944}
1945 3414
3415 if (!*avp)
3416 *avp = newAV ();
3417
3418 av_push (*avp, SvREFCNT_inc (block));
3419
3420 if (!ix)
3421 on_enterleave_call (aTHX_ block);
3422
3423 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3424 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3425 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around xs calls */
3426}
3427
3428
3429MODULE = Coro::State PACKAGE = PerlIO::cede
3430
3431BOOT:
3432 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3433
3434
3435MODULE = Coro::State PACKAGE = Coro::Semaphore
3436
3437SV *
3438new (SV *klass, SV *count = 0)
3439 CODE:
3440 RETVAL = sv_bless (
3441 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3442 GvSTASH (CvGV (cv))
3443 );
3444 OUTPUT:
3445 RETVAL
3446
3447# helper for Coro::Channel and others
3448SV *
3449_alloc (int count)
3450 CODE:
3451 RETVAL = coro_waitarray_new (aTHX_ count);
3452 OUTPUT:
3453 RETVAL
3454
3455SV *
3456count (SV *self)
3457 CODE:
3458 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3459 OUTPUT:
3460 RETVAL
3461
3462void
3463up (SV *self, int adjust = 1)
3464 ALIAS:
3465 adjust = 1
3466 CODE:
3467 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3468
3469void
3470down (...)
3471 CODE:
3472 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3473
3474void
3475wait (...)
3476 CODE:
3477 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3478
3479void
3480try (SV *self)
3481 PPCODE:
3482{
3483 AV *av = (AV *)SvRV (self);
3484 SV *count_sv = AvARRAY (av)[0];
3485 IV count = SvIVX (count_sv);
3486
3487 if (count > 0)
3488 {
3489 --count;
3490 SvIVX (count_sv) = count;
3491 XSRETURN_YES;
3492 }
3493 else
3494 XSRETURN_NO;
3495}
3496
3497void
3498waiters (SV *self)
3499 PPCODE:
3500{
3501 AV *av = (AV *)SvRV (self);
3502 int wcount = AvFILLp (av) + 1 - 1;
3503
3504 if (GIMME_V == G_SCALAR)
3505 XPUSHs (sv_2mortal (newSViv (wcount)));
3506 else
3507 {
3508 int i;
3509 EXTEND (SP, wcount);
3510 for (i = 1; i <= wcount; ++i)
3511 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3512 }
3513}
3514
3515MODULE = Coro::State PACKAGE = Coro::Signal
3516
3517SV *
3518new (SV *klass)
3519 CODE:
3520 RETVAL = sv_bless (
3521 coro_waitarray_new (aTHX_ 0),
3522 GvSTASH (CvGV (cv))
3523 );
3524 OUTPUT:
3525 RETVAL
3526
3527void
3528wait (...)
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3531
3532void
3533broadcast (SV *self)
3534 CODE:
3535{
3536 AV *av = (AV *)SvRV (self);
3537 coro_signal_wake (aTHX_ av, AvFILLp (av));
3538}
3539
3540void
3541send (SV *self)
3542 CODE:
3543{
3544 AV *av = (AV *)SvRV (self);
3545
3546 if (AvFILLp (av))
3547 coro_signal_wake (aTHX_ av, 1);
3548 else
3549 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3550}
3551
3552IV
3553awaited (SV *self)
3554 CODE:
3555 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3556 OUTPUT:
3557 RETVAL
3558
3559
3560MODULE = Coro::State PACKAGE = Coro::AnyEvent
3561
3562BOOT:
3563 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3564
3565void
3566_schedule (...)
3567 CODE:
3568{
3569 static int incede;
3570
3571 api_cede_notself (aTHX);
3572
3573 ++incede;
3574 while (coro_nready >= incede && api_cede (aTHX))
3575 ;
3576
3577 sv_setsv (sv_activity, &PL_sv_undef);
3578 if (coro_nready >= incede)
3579 {
3580 PUSHMARK (SP);
3581 PUTBACK;
3582 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3583 }
3584
3585 --incede;
3586}
3587
3588
3589MODULE = Coro::State PACKAGE = Coro::AIO
3590
3591void
3592_register (char *target, char *proto, SV *req)
3593 CODE:
3594{
3595 CV *req_cv = coro_sv_2cv (aTHX_ req);
3596 /* newXSproto doesn't return the CV on 5.8 */
3597 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3598 sv_setpv ((SV *)slf_cv, proto);
3599 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3600}
3601

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