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Comparing Coro/Coro/State.xs (file contents):
Revision 1.213 by root, Thu Oct 11 00:40:48 2007 UTC vs.
Revision 1.349 by root, Wed Jun 10 00:47:24 2009 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 /* ready queue */
267 struct coro *next_ready;
268
269 /* state data */
270 struct CoroSLF slf_frame; /* saved slf frame */
222 AV *mainstack; 271 AV *mainstack;
223 perl_slots *slot; /* basically the saved sp */ 272 perl_slots *slot; /* basically the saved sp */
224 273
274 CV *startcv; /* the CV to execute */
225 AV *args; /* data associated with this coroutine (initial args) */ 275 AV *args; /* data associated with this coroutine (initial args) */
226 int refcnt; /* coroutines are refcounted, yes */ 276 int refcnt; /* coroutines are refcounted, yes */
227 int flags; /* CF_ flags */ 277 int flags; /* CF_ flags */
228 HV *hv; /* the perl hash associated with this coro, if any */ 278 HV *hv; /* the perl hash associated with this coro, if any */
279 void (*on_destroy)(pTHX_ struct coro *coro);
229 280
230 /* statistics */ 281 /* statistics */
231 int usecount; /* number of transfers to this coro */ 282 int usecount; /* number of transfers to this coro */
232 283
233 /* coro process data */ 284 /* coro process data */
234 int prio; 285 int prio;
235 SV *throw; /* exception to be thrown */ 286 SV *except; /* exception to be thrown */
287 SV *rouse_cb;
236 288
237 /* async_pool */ 289 /* async_pool */
238 SV *saved_deffh; 290 SV *saved_deffh;
291 SV *invoke_cb;
292 AV *invoke_av;
293
294 /* on_enter/on_leave */
295 AV *on_enter;
296 AV *on_leave;
239 297
240 /* linked list */ 298 /* linked list */
241 struct coro *next, *prev; 299 struct coro *next, *prev;
242}; 300};
243 301
244typedef struct coro *Coro__State; 302typedef struct coro *Coro__State;
245typedef struct coro *Coro__State_or_hashref; 303typedef struct coro *Coro__State_or_hashref;
304
305/* the following variables are effectively part of the perl context */
306/* and get copied between struct coro and these variables */
307/* the mainr easonw e don't support windows process emulation */
308static struct CoroSLF slf_frame; /* the current slf frame */
246 309
247/** Coro ********************************************************************/ 310/** Coro ********************************************************************/
248 311
249#define PRIO_MAX 3 312#define PRIO_MAX 3
250#define PRIO_HIGH 1 313#define PRIO_HIGH 1
… …
253#define PRIO_IDLE -3 316#define PRIO_IDLE -3
254#define PRIO_MIN -4 317#define PRIO_MIN -4
255 318
256/* for Coro.pm */ 319/* for Coro.pm */
257static SV *coro_current; 320static SV *coro_current;
258static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 321static SV *coro_readyhook;
259static int coro_nready; 322static struct coro *coro_ready [PRIO_MAX - PRIO_MIN + 1][2]; /* head|tail */
323static CV *cv_coro_run, *cv_coro_terminate;
260static struct coro *coro_first; 324static struct coro *coro_first;
325#define coro_nready coroapi.nready
261 326
262/** lowlevel stuff **********************************************************/ 327/** lowlevel stuff **********************************************************/
263 328
264static SV * 329static SV *
265coro_get_sv (pTHX_ const char *name, int create) 330coro_get_sv (pTHX_ const char *name, int create)
266{ 331{
267#if PERL_VERSION_ATLEAST (5,9,0) 332#if PERL_VERSION_ATLEAST (5,10,0)
268 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
269 get_sv (name, create); 334 get_sv (name, create);
270#endif 335#endif
271 return get_sv (name, create); 336 return get_sv (name, create);
272} 337}
273 338
274static AV * 339static AV *
275coro_get_av (pTHX_ const char *name, int create) 340coro_get_av (pTHX_ const char *name, int create)
276{ 341{
277#if PERL_VERSION_ATLEAST (5,9,0) 342#if PERL_VERSION_ATLEAST (5,10,0)
278 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
279 get_av (name, create); 344 get_av (name, create);
280#endif 345#endif
281 return get_av (name, create); 346 return get_av (name, create);
282} 347}
283 348
284static HV * 349static HV *
285coro_get_hv (pTHX_ const char *name, int create) 350coro_get_hv (pTHX_ const char *name, int create)
286{ 351{
287#if PERL_VERSION_ATLEAST (5,9,0) 352#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_hv (name, create); 354 get_hv (name, create);
290#endif 355#endif
291 return get_hv (name, create); 356 return get_hv (name, create);
292} 357}
293 358
359/* may croak */
360INLINE CV *
361coro_sv_2cv (pTHX_ SV *sv)
362{
363 HV *st;
364 GV *gvp;
365 CV *cv = sv_2cv (sv, &st, &gvp, 0);
366
367 if (!cv)
368 croak ("code reference expected");
369
370 return cv;
371}
372
373/*****************************************************************************/
374/* magic glue */
375
376#define CORO_MAGIC_type_cv 26
377#define CORO_MAGIC_type_state PERL_MAGIC_ext
378
379#define CORO_MAGIC_NN(sv, type) \
380 (expect_true (SvMAGIC (sv)->mg_type == type) \
381 ? SvMAGIC (sv) \
382 : mg_find (sv, type))
383
384#define CORO_MAGIC(sv, type) \
385 (expect_true (SvMAGIC (sv)) \
386 ? CORO_MAGIC_NN (sv, type) \
387 : 0)
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
391
392INLINE struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
417
418/* faster than SvSTATE, but expects a coroutine hv */
419#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
420#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
421
422/*****************************************************************************/
423/* padlist management and caching */
424
294static AV * 425static AV *
295coro_clone_padlist (pTHX_ CV *cv) 426coro_derive_padlist (pTHX_ CV *cv)
296{ 427{
297 AV *padlist = CvPADLIST (cv); 428 AV *padlist = CvPADLIST (cv);
298 AV *newpadlist, *newpad; 429 AV *newpadlist, *newpad;
299 430
300 newpadlist = newAV (); 431 newpadlist = newAV ();
301 AvREAL_off (newpadlist); 432 AvREAL_off (newpadlist);
302#if PERL_VERSION_ATLEAST (5,9,0) 433#if PERL_VERSION_ATLEAST (5,10,0)
303 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 434 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
304#else 435#else
305 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 436 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
306#endif 437#endif
307 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 438 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
308 --AvFILLp (padlist); 439 --AvFILLp (padlist);
309 440
310 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 441 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
311 av_store (newpadlist, 1, (SV *)newpad); 442 av_store (newpadlist, 1, (SV *)newpad);
312 443
313 return newpadlist; 444 return newpadlist;
314} 445}
315 446
316static void 447static void
317free_padlist (pTHX_ AV *padlist) 448free_padlist (pTHX_ AV *padlist)
318{ 449{
319 /* may be during global destruction */ 450 /* may be during global destruction */
320 if (SvREFCNT (padlist)) 451 if (!IN_DESTRUCT)
321 { 452 {
322 I32 i = AvFILLp (padlist); 453 I32 i = AvFILLp (padlist);
323 while (i >= 0) 454
455 while (i > 0) /* special-case index 0 */
324 { 456 {
325 SV **svp = av_fetch (padlist, i--, FALSE); 457 /* we try to be extra-careful here */
326 if (svp) 458 AV *av = (AV *)AvARRAY (padlist)[i--];
327 { 459 I32 j = AvFILLp (av);
328 SV *sv; 460
329 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 461 while (j >= 0)
462 SvREFCNT_dec (AvARRAY (av)[j--]);
463
464 AvFILLp (av) = -1;
330 SvREFCNT_dec (sv); 465 SvREFCNT_dec (av);
331
332 SvREFCNT_dec (*svp);
333 }
334 } 466 }
335 467
468 SvREFCNT_dec (AvARRAY (padlist)[0]);
469
470 AvFILLp (padlist) = -1;
336 SvREFCNT_dec ((SV*)padlist); 471 SvREFCNT_dec ((SV*)padlist);
337 } 472 }
338} 473}
339 474
340static int 475static int
… …
345 480
346 /* casting is fun. */ 481 /* casting is fun. */
347 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 482 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
348 free_padlist (aTHX_ padlist); 483 free_padlist (aTHX_ padlist);
349 484
350 SvREFCNT_dec (av); 485 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
351 486
352 return 0; 487 return 0;
353} 488}
354 489
355#define PERL_MAGIC_coro PERL_MAGIC_ext 490static MGVTBL coro_cv_vtbl = {
356 491 0, 0, 0, 0,
357static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 492 coro_cv_free
358 493};
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))
391 494
392/* the next two functions merely cache the padlists */ 495/* the next two functions merely cache the padlists */
393static void 496static void
394get_padlist (pTHX_ CV *cv) 497get_padlist (pTHX_ CV *cv)
395{ 498{
396 MAGIC *mg = CORO_MAGIC (cv); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
397 AV *av; 500 AV *av;
398 501
399 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 502 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
400 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 503 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
401 else 504 else
402 { 505 {
403#if CORO_PREFER_PERL_FUNCTIONS 506#if CORO_PREFER_PERL_FUNCTIONS
404 /* this is probably cleaner, but also slower? */ 507 /* this is probably cleaner? but also slower! */
508 /* in practise, it seems to be less stable */
405 CV *cp = Perl_cv_clone (cv); 509 CV *cp = Perl_cv_clone (aTHX_ cv);
406 CvPADLIST (cv) = CvPADLIST (cp); 510 CvPADLIST (cv) = CvPADLIST (cp);
407 CvPADLIST (cp) = 0; 511 CvPADLIST (cp) = 0;
408 SvREFCNT_dec (cp); 512 SvREFCNT_dec (cp);
409#else 513#else
410 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 514 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
411#endif 515#endif
412 } 516 }
413} 517}
414 518
415static void 519static void
416put_padlist (pTHX_ CV *cv) 520put_padlist (pTHX_ CV *cv)
417{ 521{
418 MAGIC *mg = CORO_MAGIC (cv); 522 MAGIC *mg = CORO_MAGIC_cv (cv);
419 AV *av; 523 AV *av;
420 524
421 if (expect_false (!mg)) 525 if (expect_false (!mg))
422 { 526 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 }
428 527
429 av = (AV *)mg->mg_obj; 528 av = (AV *)mg->mg_obj;
430 529
431 if (expect_false (AvFILLp (av) >= AvMAX (av))) 530 if (expect_false (AvFILLp (av) >= AvMAX (av)))
432 av_extend (av, AvMAX (av) + 1); 531 av_extend (av, AvFILLp (av) + 1);
433 532
434 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 533 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
435} 534}
436 535
437/** load & save, init *******************************************************/ 536/** load & save, init *******************************************************/
537
538static void
539on_enterleave_call (pTHX_ SV *cb);
438 540
439static void 541static void
440load_perl (pTHX_ Coro__State c) 542load_perl (pTHX_ Coro__State c)
441{ 543{
442 perl_slots *slot = c->slot; 544 perl_slots *slot = c->slot;
443 c->slot = 0; 545 c->slot = 0;
444 546
445 PL_mainstack = c->mainstack; 547 PL_mainstack = c->mainstack;
446 548
447 GvSV (PL_defgv) = slot->defsv; 549 GvSV (PL_defgv) = slot->defsv;
448 GvAV (PL_defgv) = slot->defav; 550 GvAV (PL_defgv) = slot->defav;
449 GvSV (PL_errgv) = slot->errsv; 551 GvSV (PL_errgv) = slot->errsv;
450 GvSV (irsgv) = slot->irsgv; 552 GvSV (irsgv) = slot->irsgv;
553 GvHV (PL_hintgv) = slot->hinthv;
451 554
452 #define VAR(name,type) PL_ ## name = slot->name; 555 #define VAR(name,type) PL_ ## name = slot->name;
453 # include "state.h" 556 # include "state.h"
454 #undef VAR 557 #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);*/
458 558
459 { 559 {
460 dSP; 560 dSP;
461 561
462 CV *cv; 562 CV *cv;
… …
469 CvPADLIST (cv) = (AV *)POPs; 569 CvPADLIST (cv) = (AV *)POPs;
470 } 570 }
471 571
472 PUTBACK; 572 PUTBACK;
473 } 573 }
574
575 slf_frame = c->slf_frame;
576 CORO_THROW = c->except;
577
578 if (expect_false (c->on_enter))
579 {
580 int i;
581
582 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
583 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
584 }
474} 585}
475 586
476static void 587static void
477save_perl (pTHX_ Coro__State c) 588save_perl (pTHX_ Coro__State c)
478{ 589{
590 if (expect_false (c->on_leave))
591 {
592 int i;
593
594 for (i = AvFILLp (c->on_leave); i >= 0; --i)
595 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
596 }
597
598 c->except = CORO_THROW;
599 c->slf_frame = slf_frame;
600
479 { 601 {
480 dSP; 602 dSP;
481 I32 cxix = cxstack_ix; 603 I32 cxix = cxstack_ix;
482 PERL_CONTEXT *ccstk = cxstack; 604 PERL_CONTEXT *ccstk = cxstack;
483 PERL_SI *top_si = PL_curstackinfo; 605 PERL_SI *top_si = PL_curstackinfo;
… …
501 623
502 if (expect_true (CvDEPTH (cv))) 624 if (expect_true (CvDEPTH (cv)))
503 { 625 {
504 EXTEND (SP, 3); 626 EXTEND (SP, 3);
505 PUSHs ((SV *)CvPADLIST (cv)); 627 PUSHs ((SV *)CvPADLIST (cv));
506 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 628 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
507 PUSHs ((SV *)cv); 629 PUSHs ((SV *)cv);
508 630
509 CvDEPTH (cv) = 0; 631 CvDEPTH (cv) = 0;
510 get_padlist (aTHX_ cv); 632 get_padlist (aTHX_ cv);
511 } 633 }
… …
538 c->mainstack = PL_mainstack; 660 c->mainstack = PL_mainstack;
539 661
540 { 662 {
541 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1); 663 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
542 664
543 slot->defav = GvAV (PL_defgv); 665 slot->defav = GvAV (PL_defgv);
544 slot->defsv = DEFSV; 666 slot->defsv = DEFSV;
545 slot->errsv = ERRSV; 667 slot->errsv = ERRSV;
546 slot->irsgv = GvSV (irsgv); 668 slot->irsgv = GvSV (irsgv);
669 slot->hinthv = GvHV (PL_hintgv);
547 670
548 #define VAR(name,type) slot->name = PL_ ## name; 671 #define VAR(name,type) slot->name = PL_ ## name;
549 # include "state.h" 672 # include "state.h"
550 #undef VAR 673 #undef VAR
551 } 674 }
552} 675}
553 676
554/* 677/*
555 * allocate various perl stacks. This is an exact copy 678 * allocate various perl stacks. This is almost an exact copy
556 * of perl.c:init_stacks, except that it uses less memory 679 * of perl.c:init_stacks, except that it uses less memory
557 * on the (sometimes correct) assumption that coroutines do 680 * on the (sometimes correct) assumption that coroutines do
558 * not usually need a lot of stackspace. 681 * not usually need a lot of stackspace.
559 */ 682 */
560#if CORO_PREFER_PERL_FUNCTIONS 683#if CORO_PREFER_PERL_FUNCTIONS
561# define coro_init_stacks init_stacks 684# define coro_init_stacks(thx) init_stacks ()
562#else 685#else
563static void 686static void
564coro_init_stacks (pTHX) 687coro_init_stacks (pTHX)
565{ 688{
566 PL_curstackinfo = new_stackinfo(32, 8); 689 PL_curstackinfo = new_stackinfo(32, 8);
… …
591 714
592 New(54,PL_savestack,24,ANY); 715 New(54,PL_savestack,24,ANY);
593 PL_savestack_ix = 0; 716 PL_savestack_ix = 0;
594 PL_savestack_max = 24; 717 PL_savestack_max = 24;
595 718
596#if !PERL_VERSION_ATLEAST (5,9,0) 719#if !PERL_VERSION_ATLEAST (5,10,0)
597 New(54,PL_retstack,4,OP*); 720 New(54,PL_retstack,4,OP*);
598 PL_retstack_ix = 0; 721 PL_retstack_ix = 0;
599 PL_retstack_max = 4; 722 PL_retstack_max = 4;
600#endif 723#endif
601} 724}
… …
603 726
604/* 727/*
605 * destroy the stacks, the callchain etc... 728 * destroy the stacks, the callchain etc...
606 */ 729 */
607static void 730static void
608coro_destroy_stacks (pTHX) 731coro_destruct_stacks (pTHX)
609{ 732{
610 while (PL_curstackinfo->si_next) 733 while (PL_curstackinfo->si_next)
611 PL_curstackinfo = PL_curstackinfo->si_next; 734 PL_curstackinfo = PL_curstackinfo->si_next;
612 735
613 while (PL_curstackinfo) 736 while (PL_curstackinfo)
… …
624 747
625 Safefree (PL_tmps_stack); 748 Safefree (PL_tmps_stack);
626 Safefree (PL_markstack); 749 Safefree (PL_markstack);
627 Safefree (PL_scopestack); 750 Safefree (PL_scopestack);
628 Safefree (PL_savestack); 751 Safefree (PL_savestack);
629#if !PERL_VERSION_ATLEAST (5,9,0) 752#if !PERL_VERSION_ATLEAST (5,10,0)
630 Safefree (PL_retstack); 753 Safefree (PL_retstack);
631#endif 754#endif
632} 755}
756
757#define CORO_RSS \
758 rss += sizeof (SYM (curstackinfo)); \
759 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
760 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
761 rss += SYM (tmps_max) * sizeof (SV *); \
762 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
763 rss += SYM (scopestack_max) * sizeof (I32); \
764 rss += SYM (savestack_max) * sizeof (ANY);
633 765
634static size_t 766static size_t
635coro_rss (pTHX_ struct coro *coro) 767coro_rss (pTHX_ struct coro *coro)
636{ 768{
637 size_t rss = sizeof (*coro); 769 size_t rss = sizeof (*coro);
638 770
639 if (coro->mainstack) 771 if (coro->mainstack)
640 { 772 {
641 perl_slots tmp_slot;
642 perl_slots *slot;
643
644 if (coro->flags & CF_RUNNING) 773 if (coro->flags & CF_RUNNING)
645 { 774 {
646 slot = &tmp_slot; 775 #define SYM(sym) PL_ ## sym
647 776 CORO_RSS;
648 #define VAR(name,type) slot->name = PL_ ## name;
649 # include "state.h"
650 #undef VAR 777 #undef SYM
651 } 778 }
652 else 779 else
653 slot = coro->slot; 780 {
654 781 #define SYM(sym) coro->slot->sym
655 rss += sizeof (slot->curstackinfo); 782 CORO_RSS;
656 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 783 #undef SYM
657 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 784 }
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 } 785 }
667 786
668 return rss; 787 return rss;
669} 788}
670 789
671/** coroutine stack handling ************************************************/ 790/** coroutine stack handling ************************************************/
672 791
792static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
793static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
794static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
795
796/* apparently < 5.8.8 */
797#ifndef MgPV_nolen_const
798#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
799 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
800 (const char*)(mg)->mg_ptr)
801#endif
802
803/*
804 * This overrides the default magic get method of %SIG elements.
805 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
806 * and instead of trying to save and restore the hash elements, we just provide
807 * readback here.
808 */
673static void 809static int
810coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
811{
812 const char *s = MgPV_nolen_const (mg);
813
814 if (*s == '_')
815 {
816 SV **svp = 0;
817
818 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
819 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
820
821 if (svp)
822 {
823 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
824 return 0;
825 }
826 }
827
828 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
829}
830
831static int
832coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
833{
834 const char *s = MgPV_nolen_const (mg);
835
836 if (*s == '_')
837 {
838 SV **svp = 0;
839
840 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
841 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
842
843 if (svp)
844 {
845 SV *old = *svp;
846 *svp = 0;
847 SvREFCNT_dec (old);
848 return 0;
849 }
850 }
851
852 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
853}
854
855static int
856coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
857{
858 const char *s = MgPV_nolen_const (mg);
859
860 if (*s == '_')
861 {
862 SV **svp = 0;
863
864 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
865 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
866
867 if (svp)
868 {
869 SV *old = *svp;
870 *svp = SvOK (sv) ? newSVsv (sv) : 0;
871 SvREFCNT_dec (old);
872 return 0;
873 }
874 }
875
876 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
877}
878
879static void
880prepare_nop (pTHX_ struct coro_transfer_args *ta)
881{
882 /* kind of mega-hacky, but works */
883 ta->next = ta->prev = (struct coro *)ta;
884}
885
886static int
887slf_check_nop (pTHX_ struct CoroSLF *frame)
888{
889 return 0;
890}
891
892static int
893slf_check_repeat (pTHX_ struct CoroSLF *frame)
894{
895 return 1;
896}
897
898static UNOP coro_setup_op;
899
900static void NOINLINE /* noinline to keep it out of the transfer fast path */
674coro_setup (pTHX_ struct coro *coro) 901coro_setup (pTHX_ struct coro *coro)
675{ 902{
676 /* 903 /*
677 * emulate part of the perl startup here. 904 * emulate part of the perl startup here.
678 */ 905 */
… …
680 907
681 PL_runops = RUNOPS_DEFAULT; 908 PL_runops = RUNOPS_DEFAULT;
682 PL_curcop = &PL_compiling; 909 PL_curcop = &PL_compiling;
683 PL_in_eval = EVAL_NULL; 910 PL_in_eval = EVAL_NULL;
684 PL_comppad = 0; 911 PL_comppad = 0;
912 PL_comppad_name = 0;
913 PL_comppad_name_fill = 0;
914 PL_comppad_name_floor = 0;
685 PL_curpm = 0; 915 PL_curpm = 0;
686 PL_curpad = 0; 916 PL_curpad = 0;
687 PL_localizing = 0; 917 PL_localizing = 0;
688 PL_dirty = 0; 918 PL_dirty = 0;
689 PL_restartop = 0; 919 PL_restartop = 0;
920#if PERL_VERSION_ATLEAST (5,10,0)
921 PL_parser = 0;
922#endif
923 PL_hints = 0;
924
925 /* recreate the die/warn hooks */
690 PL_diehook = 0; hv_store (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, SvREFCNT_inc (sv_diehook ), 0); 926 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); 927 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
692 928
693 GvSV (PL_defgv) = newSV (0); 929 GvSV (PL_defgv) = newSV (0);
694 GvAV (PL_defgv) = coro->args; coro->args = 0; 930 GvAV (PL_defgv) = coro->args; coro->args = 0;
695 GvSV (PL_errgv) = newSV (0); 931 GvSV (PL_errgv) = newSV (0);
696 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 932 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
933 GvHV (PL_hintgv) = 0;
697 PL_rs = newSVsv (GvSV (irsgv)); 934 PL_rs = newSVsv (GvSV (irsgv));
698 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 935 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
699 936
700 { 937 {
701 dSP; 938 dSP;
702 LOGOP myop; 939 UNOP myop;
703 940
704 Zero (&myop, 1, LOGOP); 941 Zero (&myop, 1, UNOP);
705 myop.op_next = Nullop; 942 myop.op_next = Nullop;
943 myop.op_type = OP_ENTERSUB;
706 myop.op_flags = OPf_WANT_VOID; 944 myop.op_flags = OPf_WANT_VOID;
707 945
708 PUSHMARK (SP); 946 PUSHMARK (SP);
709 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 947 PUSHs ((SV *)coro->startcv);
710 PUTBACK; 948 PUTBACK;
711 PL_op = (OP *)&myop; 949 PL_op = (OP *)&myop;
712 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 950 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
713 SPAGAIN;
714 } 951 }
715 952
716 /* this newly created coroutine might be run on an existing cctx which most 953 /* this newly created coroutine might be run on an existing cctx which most
717 * likely was suspended in set_stacklevel, called from entersub. 954 * 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 */ 955 */
721 ENTER; 956 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
722} 957 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
723 958
959 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
960 coro_setup_op.op_next = PL_op;
961 coro_setup_op.op_type = OP_ENTERSUB;
962 coro_setup_op.op_ppaddr = pp_slf;
963 /* no flags etc. required, as an init function won't be called */
964
965 PL_op = (OP *)&coro_setup_op;
966
967 /* copy throw, in case it was set before coro_setup */
968 CORO_THROW = coro->except;
969}
970
724static void 971static void
725coro_destroy (pTHX_ struct coro *coro) 972coro_unwind_stacks (pTHX)
726{ 973{
727 if (!IN_DESTRUCT) 974 if (!IN_DESTRUCT)
728 { 975 {
729 /* restore all saved variables and stuff */ 976 /* restore all saved variables and stuff */
730 LEAVE_SCOPE (0); 977 LEAVE_SCOPE (0);
… …
738 POPSTACK_TO (PL_mainstack); 985 POPSTACK_TO (PL_mainstack);
739 986
740 /* unwind main stack */ 987 /* unwind main stack */
741 dounwind (-1); 988 dounwind (-1);
742 } 989 }
990}
991
992static void
993coro_destruct_perl (pTHX_ struct coro *coro)
994{
995 coro_unwind_stacks (aTHX);
743 996
744 SvREFCNT_dec (GvSV (PL_defgv)); 997 SvREFCNT_dec (GvSV (PL_defgv));
745 SvREFCNT_dec (GvAV (PL_defgv)); 998 SvREFCNT_dec (GvAV (PL_defgv));
746 SvREFCNT_dec (GvSV (PL_errgv)); 999 SvREFCNT_dec (GvSV (PL_errgv));
747 SvREFCNT_dec (PL_defoutgv); 1000 SvREFCNT_dec (PL_defoutgv);
748 SvREFCNT_dec (PL_rs); 1001 SvREFCNT_dec (PL_rs);
749 SvREFCNT_dec (GvSV (irsgv)); 1002 SvREFCNT_dec (GvSV (irsgv));
1003 SvREFCNT_dec (GvHV (PL_hintgv));
750 1004
751 SvREFCNT_dec (PL_diehook); 1005 SvREFCNT_dec (PL_diehook);
752 SvREFCNT_dec (PL_warnhook); 1006 SvREFCNT_dec (PL_warnhook);
753 1007
754 SvREFCNT_dec (coro->saved_deffh); 1008 SvREFCNT_dec (coro->saved_deffh);
755 SvREFCNT_dec (coro->throw); 1009 SvREFCNT_dec (coro->rouse_cb);
1010 SvREFCNT_dec (coro->invoke_cb);
1011 SvREFCNT_dec (coro->invoke_av);
756 1012
757 coro_destroy_stacks (aTHX); 1013 coro_destruct_stacks (aTHX);
758} 1014}
759 1015
760static void 1016INLINE void
761free_coro_mortal (pTHX) 1017free_coro_mortal (pTHX)
762{ 1018{
763 if (expect_true (coro_mortal)) 1019 if (expect_true (coro_mortal))
764 { 1020 {
765 SvREFCNT_dec (coro_mortal); 1021 SvREFCNT_dec (coro_mortal);
… …
770static int 1026static int
771runops_trace (pTHX) 1027runops_trace (pTHX)
772{ 1028{
773 COP *oldcop = 0; 1029 COP *oldcop = 0;
774 int oldcxix = -2; 1030 int oldcxix = -2;
775 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
776 coro_cctx *cctx = coro->cctx;
777 1031
778 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 1032 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
779 { 1033 {
780 PERL_ASYNC_CHECK (); 1034 PERL_ASYNC_CHECK ();
781 1035
782 if (cctx->flags & CC_TRACE_ALL) 1036 if (cctx_current->flags & CC_TRACE_ALL)
783 { 1037 {
784 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB) 1038 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
785 { 1039 {
786 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
787 SV **bot, **top; 1041 SV **bot, **top;
788 AV *av = newAV (); /* return values */ 1042 AV *av = newAV (); /* return values */
789 SV **cb; 1043 SV **cb;
… …
799 : cx->blk_gimme == G_SCALAR ? bot + 1 1053 : cx->blk_gimme == G_SCALAR ? bot + 1
800 : bot; 1054 : bot;
801 1055
802 av_extend (av, top - bot); 1056 av_extend (av, top - bot);
803 while (bot < top) 1057 while (bot < top)
804 av_push (av, SvREFCNT_inc (*bot++)); 1058 av_push (av, SvREFCNT_inc_NN (*bot++));
805 1059
806 PL_runops = RUNOPS_DEFAULT; 1060 PL_runops = RUNOPS_DEFAULT;
807 ENTER; 1061 ENTER;
808 SAVETMPS; 1062 SAVETMPS;
809 EXTEND (SP, 3); 1063 EXTEND (SP, 3);
… …
826 1080
827 if (PL_curcop != &PL_compiling) 1081 if (PL_curcop != &PL_compiling)
828 { 1082 {
829 SV **cb; 1083 SV **cb;
830 1084
831 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB) 1085 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
832 { 1086 {
833 PERL_CONTEXT *cx = &cxstack[cxstack_ix]; 1087 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
834 1088
835 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix) 1089 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
836 { 1090 {
837 runops_proc_t old_runops = PL_runops;
838 dSP; 1091 dSP;
839 GV *gv = CvGV (cx->blk_sub.cv); 1092 GV *gv = CvGV (cx->blk_sub.cv);
840 SV *fullname = sv_2mortal (newSV (0)); 1093 SV *fullname = sv_2mortal (newSV (0));
841 1094
842 if (isGV (gv)) 1095 if (isGV (gv))
… …
847 SAVETMPS; 1100 SAVETMPS;
848 EXTEND (SP, 3); 1101 EXTEND (SP, 3);
849 PUSHMARK (SP); 1102 PUSHMARK (SP);
850 PUSHs (&PL_sv_yes); 1103 PUSHs (&PL_sv_yes);
851 PUSHs (fullname); 1104 PUSHs (fullname);
852 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1105 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
853 PUTBACK; 1106 PUTBACK;
854 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1107 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); 1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
856 SPAGAIN; 1109 SPAGAIN;
857 FREETMPS; 1110 FREETMPS;
… …
860 } 1113 }
861 1114
862 oldcxix = cxstack_ix; 1115 oldcxix = cxstack_ix;
863 } 1116 }
864 1117
865 if (cctx->flags & CC_TRACE_LINE) 1118 if (cctx_current->flags & CC_TRACE_LINE)
866 { 1119 {
867 dSP; 1120 dSP;
868 1121
869 PL_runops = RUNOPS_DEFAULT; 1122 PL_runops = RUNOPS_DEFAULT;
870 ENTER; 1123 ENTER;
… …
889 1142
890 TAINT_NOT; 1143 TAINT_NOT;
891 return 0; 1144 return 0;
892} 1145}
893 1146
894/* inject a fake call to Coro::State::_cctx_init into the execution */ 1147static struct CoroSLF cctx_ssl_frame;
895/* _cctx_init should be careful, as it could be called at almost any time */ 1148
896/* during execution of a perl program */ 1149static void
1150slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1151{
1152 ta->prev = 0;
1153}
1154
1155static int
1156slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1157{
1158 *frame = cctx_ssl_frame;
1159
1160 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1161}
1162
1163/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
897static void NOINLINE 1164static void NOINLINE
898cctx_prepare (pTHX_ coro_cctx *cctx) 1165cctx_prepare (pTHX)
899{ 1166{
900 dSP;
901 LOGOP myop;
902
903 PL_top_env = &PL_start_env; 1167 PL_top_env = &PL_start_env;
904 1168
905 if (cctx->flags & CC_TRACE) 1169 if (cctx_current->flags & CC_TRACE)
906 PL_runops = runops_trace; 1170 PL_runops = runops_trace;
907 1171
908 Zero (&myop, 1, LOGOP); 1172 /* we already must be executing an SLF op, there is no other valid way
909 myop.op_next = PL_op; 1173 * that can lead to creation of a new cctx */
910 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1174 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1175 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
911 1176
912 PUSHMARK (SP); 1177 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
913 EXTEND (SP, 2); 1178 cctx_ssl_frame = slf_frame;
914 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1179
915 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1180 slf_frame.prepare = slf_prepare_set_stacklevel;
916 PUTBACK; 1181 slf_frame.check = slf_check_set_stacklevel;
917 PL_op = (OP *)&myop; 1182}
918 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1183
919 SPAGAIN; 1184/* the tail of transfer: execute stuff we can only do after a transfer */
1185INLINE void
1186transfer_tail (pTHX)
1187{
1188 free_coro_mortal (aTHX);
920} 1189}
921 1190
922/* 1191/*
923 * this is a _very_ stripped down perl interpreter ;) 1192 * this is a _very_ stripped down perl interpreter ;)
924 */ 1193 */
925static void 1194static void
926cctx_run (void *arg) 1195cctx_run (void *arg)
927{ 1196{
1197#ifdef USE_ITHREADS
1198# if CORO_PTHREAD
1199 PERL_SET_CONTEXT (coro_thx);
1200# endif
1201#endif
1202 {
928 dTHX; 1203 dTHX;
929 1204
930 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1205 /* normally we would need to skip the entersub here */
931 UNLOCK; 1206 /* 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; 1207 /* PL_nop = PL_nop->op_next */
935 1208
936 /* inject a fake subroutine call to cctx_init */ 1209 /* inject a fake subroutine call to cctx_init */
937 cctx_prepare (aTHX_ (coro_cctx *)arg); 1210 cctx_prepare (aTHX);
938 1211
1212 /* cctx_run is the alternative tail of transfer() */
1213 transfer_tail (aTHX);
1214
939 /* somebody or something will hit me for both perl_run and PL_restartop */ 1215 /* somebody or something will hit me for both perl_run and PL_restartop */
940 PL_restartop = PL_op; 1216 PL_restartop = PL_op;
941 perl_run (PL_curinterp); 1217 perl_run (PL_curinterp);
942
943 /* 1218 /*
1219 * Unfortunately, there is no way to get at the return values of the
1220 * coro body here, as perl_run destroys these
1221 */
1222
1223 /*
944 * If perl-run returns we assume exit() was being called or the coro 1224 * 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) 1225 * 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 1226 * 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" 1227 * bootstrap-time "top" top_env, as we cannot restore the "main"
948 * coroutine as Coro has no such concept 1228 * coroutine as Coro has no such concept.
1229 * This actually isn't valid with the pthread backend, but OSes requiring
1230 * that backend are too broken to do it in a standards-compliant way.
949 */ 1231 */
950 PL_top_env = main_top_env; 1232 PL_top_env = main_top_env;
951 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1233 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1234 }
952} 1235}
953 1236
954static coro_cctx * 1237static coro_cctx *
955cctx_new () 1238cctx_new ()
956{ 1239{
957 coro_cctx *cctx; 1240 coro_cctx *cctx;
1241
1242 ++cctx_count;
1243 New (0, cctx, 1, coro_cctx);
1244
1245 cctx->gen = cctx_gen;
1246 cctx->flags = 0;
1247 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1248
1249 return cctx;
1250}
1251
1252/* create a new cctx only suitable as source */
1253static coro_cctx *
1254cctx_new_empty ()
1255{
1256 coro_cctx *cctx = cctx_new ();
1257
1258 cctx->sptr = 0;
1259 coro_create (&cctx->cctx, 0, 0, 0, 0);
1260
1261 return cctx;
1262}
1263
1264/* create a new cctx suitable as destination/running a perl interpreter */
1265static coro_cctx *
1266cctx_new_run ()
1267{
1268 coro_cctx *cctx = cctx_new ();
958 void *stack_start; 1269 void *stack_start;
959 size_t stack_size; 1270 size_t stack_size;
960 1271
961 ++cctx_count;
962
963 Newz (0, cctx, 1, coro_cctx);
964
965#if HAVE_MMAP 1272#if HAVE_MMAP
966 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1273 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
967 /* mmap supposedly does allocate-on-write for us */ 1274 /* 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); 1275 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
969 1276
970 if (cctx->sptr != (void *)-1) 1277 if (cctx->sptr != (void *)-1)
971 { 1278 {
972# if CORO_STACKGUARD 1279 #if CORO_STACKGUARD
973 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1280 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
974# endif 1281 #endif
975 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1282 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
976 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1283 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
977 cctx->flags |= CC_MAPPED; 1284 cctx->flags |= CC_MAPPED;
978 } 1285 }
979 else 1286 else
980#endif 1287#endif
981 { 1288 {
982 cctx->ssize = coro_stacksize * (long)sizeof (long); 1289 cctx->ssize = cctx_stacksize * (long)sizeof (long);
983 New (0, cctx->sptr, coro_stacksize, long); 1290 New (0, cctx->sptr, cctx_stacksize, long);
984 1291
985 if (!cctx->sptr) 1292 if (!cctx->sptr)
986 { 1293 {
987 perror ("FATAL: unable to allocate stack for coroutine"); 1294 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
988 _exit (EXIT_FAILURE); 1295 _exit (EXIT_FAILURE);
989 } 1296 }
990 1297
991 stack_start = cctx->sptr; 1298 stack_start = cctx->sptr;
992 stack_size = cctx->ssize; 1299 stack_size = cctx->ssize;
993 } 1300 }
994 1301
995 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1302 #if CORO_USE_VALGRIND
1303 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1304 #endif
1305
996 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1306 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
997 1307
998 return cctx; 1308 return cctx;
999} 1309}
1000 1310
… …
1002cctx_destroy (coro_cctx *cctx) 1312cctx_destroy (coro_cctx *cctx)
1003{ 1313{
1004 if (!cctx) 1314 if (!cctx)
1005 return; 1315 return;
1006 1316
1317 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1318
1007 --cctx_count; 1319 --cctx_count;
1320 coro_destroy (&cctx->cctx);
1008 1321
1322 /* coro_transfer creates new, empty cctx's */
1323 if (cctx->sptr)
1324 {
1009#if CORO_USE_VALGRIND 1325 #if CORO_USE_VALGRIND
1010 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1326 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1011#endif 1327 #endif
1012 1328
1013#if HAVE_MMAP 1329#if HAVE_MMAP
1014 if (cctx->flags & CC_MAPPED) 1330 if (cctx->flags & CC_MAPPED)
1015 munmap (cctx->sptr, cctx->ssize); 1331 munmap (cctx->sptr, cctx->ssize);
1016 else 1332 else
1017#endif 1333#endif
1018 Safefree (cctx->sptr); 1334 Safefree (cctx->sptr);
1335 }
1019 1336
1020 Safefree (cctx); 1337 Safefree (cctx);
1021} 1338}
1022 1339
1023/* wether this cctx should be destructed */ 1340/* wether this cctx should be destructed */
1024#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1341#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1025 1342
1026static coro_cctx * 1343static coro_cctx *
1027cctx_get (pTHX) 1344cctx_get (pTHX)
1028{ 1345{
1029 while (expect_true (cctx_first)) 1346 while (expect_true (cctx_first))
… …
1036 return cctx; 1353 return cctx;
1037 1354
1038 cctx_destroy (cctx); 1355 cctx_destroy (cctx);
1039 } 1356 }
1040 1357
1041 return cctx_new (); 1358 return cctx_new_run ();
1042} 1359}
1043 1360
1044static void 1361static void
1045cctx_put (coro_cctx *cctx) 1362cctx_put (coro_cctx *cctx)
1046{ 1363{
1364 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1365
1047 /* free another cctx if overlimit */ 1366 /* free another cctx if overlimit */
1048 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1367 if (expect_false (cctx_idle >= cctx_max_idle))
1049 { 1368 {
1050 coro_cctx *first = cctx_first; 1369 coro_cctx *first = cctx_first;
1051 cctx_first = first->next; 1370 cctx_first = first->next;
1052 --cctx_idle; 1371 --cctx_idle;
1053 1372
… …
1062/** coroutine switching *****************************************************/ 1381/** coroutine switching *****************************************************/
1063 1382
1064static void 1383static void
1065transfer_check (pTHX_ struct coro *prev, struct coro *next) 1384transfer_check (pTHX_ struct coro *prev, struct coro *next)
1066{ 1385{
1386 /* TODO: throwing up here is considered harmful */
1387
1067 if (expect_true (prev != next)) 1388 if (expect_true (prev != next))
1068 { 1389 {
1069 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1390 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"); 1391 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1071 1392
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)) 1393 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"); 1394 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1077 1395
1078 if (
1079#if PERL_VERSION_ATLEAST (5,9,0) 1396#if !PERL_VERSION_ATLEAST (5,10,0)
1080 expect_false (PL_parser)
1081#else
1082 expect_false (PL_lex_state != LEX_NOTPARSING) 1397 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1083#endif
1084 )
1085 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1398 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1399#endif
1086 } 1400 }
1087} 1401}
1088 1402
1089/* always use the TRANSFER macro */ 1403/* always use the TRANSFER macro */
1090static void NOINLINE 1404static void NOINLINE /* noinline so we have a fixed stackframe */
1091transfer (pTHX_ struct coro *prev, struct coro *next) 1405transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1092{ 1406{
1093 dSTACKLEVEL; 1407 dSTACKLEVEL;
1094 1408
1095 /* sometimes transfer is only called to set idle_sp */ 1409 /* sometimes transfer is only called to set idle_sp */
1096 if (expect_false (!next)) 1410 if (expect_false (!prev))
1097 { 1411 {
1098 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1412 cctx_current->idle_sp = STACKLEVEL;
1099 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */ 1413 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1100 } 1414 }
1101 else if (expect_true (prev != next)) 1415 else if (expect_true (prev != next))
1102 { 1416 {
1103 coro_cctx *prev__cctx; 1417 coro_cctx *cctx_prev;
1104 1418
1105 if (expect_false (prev->flags & CF_NEW)) 1419 if (expect_false (prev->flags & CF_NEW))
1106 { 1420 {
1107 /* create a new empty context */ 1421 /* create a new empty/source context */
1108 Newz (0, prev->cctx, 1, coro_cctx);
1109 prev->flags &= ~CF_NEW; 1422 prev->flags &= ~CF_NEW;
1110 prev->flags |= CF_RUNNING; 1423 prev->flags |= CF_RUNNING;
1111 } 1424 }
1112 1425
1113 prev->flags &= ~CF_RUNNING; 1426 prev->flags &= ~CF_RUNNING;
1114 next->flags |= CF_RUNNING; 1427 next->flags |= CF_RUNNING;
1115 1428
1116 LOCK; 1429 /* first get rid of the old state */
1430 save_perl (aTHX_ prev);
1117 1431
1118 if (expect_false (next->flags & CF_NEW)) 1432 if (expect_false (next->flags & CF_NEW))
1119 { 1433 {
1120 /* need to start coroutine */ 1434 /* need to start coroutine */
1121 next->flags &= ~CF_NEW; 1435 next->flags &= ~CF_NEW;
1122 /* first get rid of the old state */
1123 save_perl (aTHX_ prev);
1124 /* setup coroutine call */ 1436 /* setup coroutine call */
1125 coro_setup (aTHX_ next); 1437 coro_setup (aTHX_ next);
1126 } 1438 }
1127 else 1439 else
1440 load_perl (aTHX_ next);
1441
1442 /* possibly untie and reuse the cctx */
1443 if (expect_true (
1444 cctx_current->idle_sp == STACKLEVEL
1445 && !(cctx_current->flags & CC_TRACE)
1446 && !force_cctx
1447 ))
1128 { 1448 {
1129 /* coroutine already started */ 1449 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1130 save_perl (aTHX_ prev); 1450 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); 1451
1452 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1453 /* without this the next cctx_get might destroy the running cctx while still in use */
1454 if (expect_false (CCTX_EXPIRED (cctx_current)))
1455 if (expect_true (!next->cctx))
1456 next->cctx = cctx_get (aTHX);
1457
1458 cctx_put (cctx_current);
1132 } 1459 }
1460 else
1461 prev->cctx = cctx_current;
1133 1462
1134 prev__cctx = prev->cctx; 1463 ++next->usecount;
1135 1464
1136 /* possibly "free" the cctx */ 1465 cctx_prev = cctx_current;
1137 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1466 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1467
1468 next->cctx = 0;
1469
1470 if (expect_false (cctx_prev != cctx_current))
1138 { 1471 {
1139 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1472 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)); 1473 PL_top_env = cctx_current->top_env;
1141 1474 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 } 1475 }
1152 1476
1153 ++next->usecount; 1477 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 } 1478 }
1181} 1479}
1182 1480
1183struct transfer_args
1184{
1185 struct coro *prev, *next;
1186};
1187
1188#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1481#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) 1482#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1190 1483
1191/** high level stuff ********************************************************/ 1484/** high level stuff ********************************************************/
1192 1485
1193static int 1486static int
1194coro_state_destroy (pTHX_ struct coro *coro) 1487coro_state_destroy (pTHX_ struct coro *coro)
1195{ 1488{
1196 if (coro->flags & CF_DESTROYED) 1489 if (coro->flags & CF_DESTROYED)
1197 return 0; 1490 return 0;
1491
1492 if (coro->on_destroy && !PL_dirty)
1493 coro->on_destroy (aTHX_ coro);
1198 1494
1199 coro->flags |= CF_DESTROYED; 1495 coro->flags |= CF_DESTROYED;
1200 1496
1201 if (coro->flags & CF_READY) 1497 if (coro->flags & CF_READY)
1202 { 1498 {
1203 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1499 /* reduce nready, as destroying a ready coro effectively unreadies it */
1204 /* alternative: look through all ready queues and remove the coro */ 1500 /* alternative: look through all ready queues and remove the coro */
1205 LOCK;
1206 --coro_nready; 1501 --coro_nready;
1207 UNLOCK;
1208 } 1502 }
1209 else 1503 else
1210 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1504 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1211 1505
1212 if (coro->mainstack && coro->mainstack != main_mainstack) 1506 if (coro->mainstack
1507 && coro->mainstack != main_mainstack
1508 && coro->slot
1509 && !PL_dirty)
1213 { 1510 {
1214 struct coro temp; 1511 struct coro *current = SvSTATE_current;
1215 1512
1216 if (coro->flags & CF_RUNNING) 1513 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1217 croak ("FATAL: tried to destroy currently running coroutine");
1218 1514
1219 save_perl (aTHX_ &temp); 1515 save_perl (aTHX_ current);
1220 load_perl (aTHX_ coro); 1516 load_perl (aTHX_ coro);
1221 1517
1222 coro_destroy (aTHX_ coro); 1518 coro_destruct_perl (aTHX_ coro);
1223 1519
1224 load_perl (aTHX_ &temp); 1520 load_perl (aTHX_ current);
1225 1521
1226 coro->slot = 0; 1522 coro->slot = 0;
1227 } 1523 }
1228 1524
1229 cctx_destroy (coro->cctx); 1525 cctx_destroy (coro->cctx);
1526 SvREFCNT_dec (coro->startcv);
1230 SvREFCNT_dec (coro->args); 1527 SvREFCNT_dec (coro->args);
1528 SvREFCNT_dec (CORO_THROW);
1231 1529
1232 if (coro->next) coro->next->prev = coro->prev; 1530 if (coro->next) coro->next->prev = coro->prev;
1233 if (coro->prev) coro->prev->next = coro->next; 1531 if (coro->prev) coro->prev->next = coro->next;
1234 if (coro == coro_first) coro_first = coro->next; 1532 if (coro == coro_first) coro_first = coro->next;
1235 1533
… …
1273# define MGf_DUP 0 1571# define MGf_DUP 0
1274#endif 1572#endif
1275}; 1573};
1276 1574
1277static void 1575static void
1278prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1576prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1279{ 1577{
1280 ta->prev = SvSTATE (prev_sv); 1578 ta->prev = SvSTATE (prev_sv);
1281 ta->next = SvSTATE (next_sv); 1579 ta->next = SvSTATE (next_sv);
1282 TRANSFER_CHECK (*ta); 1580 TRANSFER_CHECK (*ta);
1283} 1581}
1284 1582
1285static void 1583static void
1286api_transfer (SV *prev_sv, SV *next_sv) 1584api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1287{ 1585{
1288 dTHX;
1289 struct transfer_args ta; 1586 struct coro_transfer_args ta;
1290 1587
1291 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1588 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1292 TRANSFER (ta); 1589 TRANSFER (ta, 1);
1590}
1591
1592/*****************************************************************************/
1593/* gensub: simple closure generation utility */
1594
1595#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1596
1597/* create a closure from XS, returns a code reference */
1598/* the arg can be accessed via GENSUB_ARG from the callback */
1599/* the callback must use dXSARGS/XSRETURN */
1600static SV *
1601gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1602{
1603 CV *cv = (CV *)newSV (0);
1604
1605 sv_upgrade ((SV *)cv, SVt_PVCV);
1606
1607 CvANON_on (cv);
1608 CvISXSUB_on (cv);
1609 CvXSUB (cv) = xsub;
1610 GENSUB_ARG = arg;
1611
1612 return newRV_noinc ((SV *)cv);
1293} 1613}
1294 1614
1295/** Coro ********************************************************************/ 1615/** Coro ********************************************************************/
1296 1616
1297static void 1617INLINE void
1298coro_enq (pTHX_ SV *coro_sv) 1618coro_enq (pTHX_ struct coro *coro)
1299{ 1619{
1300 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1620 struct coro **ready = coro_ready [coro->prio - PRIO_MIN];
1301}
1302 1621
1303static SV * 1622 SvREFCNT_inc_NN (coro->hv);
1304coro_deq (pTHX_ int min_prio)
1305{
1306 int prio = PRIO_MAX - PRIO_MIN;
1307 1623
1308 min_prio -= PRIO_MIN; 1624 coro->next_ready = 0;
1309 if (min_prio < 0) 1625 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1310 min_prio = 0; 1626 ready [1] = coro;
1627}
1311 1628
1629INLINE struct coro *
1630coro_deq (pTHX)
1631{
1632 int prio;
1633
1312 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1634 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1313 if (AvFILLp (coro_ready [prio]) >= 0) 1635 {
1314 return av_shift (coro_ready [prio]); 1636 struct coro **ready = coro_ready [prio];
1637
1638 if (ready [0])
1639 {
1640 struct coro *coro = ready [0];
1641 ready [0] = coro->next_ready;
1642 return coro;
1643 }
1644 }
1315 1645
1316 return 0; 1646 return 0;
1317} 1647}
1318 1648
1319static int 1649static int
1320api_ready (SV *coro_sv) 1650api_ready (pTHX_ SV *coro_sv)
1321{ 1651{
1322 dTHX;
1323 struct coro *coro; 1652 struct coro *coro;
1324 1653 SV *sv_hook;
1325 if (SvROK (coro_sv)) 1654 void (*xs_hook)(void);
1326 coro_sv = SvRV (coro_sv);
1327 1655
1328 coro = SvSTATE (coro_sv); 1656 coro = SvSTATE (coro_sv);
1329 1657
1330 if (coro->flags & CF_READY) 1658 if (coro->flags & CF_READY)
1331 return 0; 1659 return 0;
1332 1660
1333 coro->flags |= CF_READY; 1661 coro->flags |= CF_READY;
1334 1662
1335 LOCK; 1663 sv_hook = coro_nready ? 0 : coro_readyhook;
1336 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1664 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1665
1666 coro_enq (aTHX_ coro);
1337 ++coro_nready; 1667 ++coro_nready;
1338 UNLOCK; 1668
1669 if (sv_hook)
1670 {
1671 dSP;
1672
1673 ENTER;
1674 SAVETMPS;
1675
1676 PUSHMARK (SP);
1677 PUTBACK;
1678 call_sv (sv_hook, G_VOID | G_DISCARD);
1679
1680 FREETMPS;
1681 LEAVE;
1682 }
1683
1684 if (xs_hook)
1685 xs_hook ();
1339 1686
1340 return 1; 1687 return 1;
1341} 1688}
1342 1689
1343static int 1690static int
1344api_is_ready (SV *coro_sv) 1691api_is_ready (pTHX_ SV *coro_sv)
1345{ 1692{
1346 dTHX;
1347 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1693 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1348} 1694}
1349 1695
1350static void 1696/* expects to own a reference to next->hv */
1697INLINE void
1351prepare_schedule (pTHX_ struct transfer_args *ta) 1698prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1352{ 1699{
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); 1700 SV *prev_sv = SvRV (coro_current);
1701
1396 ta->prev = SvSTATE (prev_sv); 1702 ta->prev = SvSTATE_hv (prev_sv);
1703 ta->next = next;
1704
1397 TRANSFER_CHECK (*ta); 1705 TRANSFER_CHECK (*ta);
1398 assert (ta->next->flags & CF_READY); 1706
1399 ta->next->flags &= ~CF_READY;
1400 SvRV_set (coro_current, next_sv); 1707 SvRV_set (coro_current, (SV *)next->hv);
1401 1708
1402 LOCK;
1403 free_coro_mortal (aTHX); 1709 free_coro_mortal (aTHX);
1404 coro_mortal = prev_sv; 1710 coro_mortal = prev_sv;
1405 UNLOCK;
1406} 1711}
1407 1712
1408static void 1713static void
1714prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1715{
1716 for (;;)
1717 {
1718 struct coro *next = coro_deq (aTHX);
1719
1720 if (expect_true (next))
1721 {
1722 /* cannot transfer to destroyed coros, skip and look for next */
1723 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1724 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1725 else
1726 {
1727 next->flags &= ~CF_READY;
1728 --coro_nready;
1729
1730 prepare_schedule_to (aTHX_ ta, next);
1731 break;
1732 }
1733 }
1734 else
1735 {
1736 /* nothing to schedule: call the idle handler */
1737 if (SvROK (sv_idle)
1738 && SvOBJECT (SvRV (sv_idle)))
1739 {
1740 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1741 api_ready (aTHX_ SvRV (sv_idle));
1742 --coro_nready;
1743 }
1744 else
1745 {
1746 dSP;
1747
1748 ENTER;
1749 SAVETMPS;
1750
1751 PUSHMARK (SP);
1752 PUTBACK;
1753 call_sv (sv_idle, G_VOID | G_DISCARD);
1754
1755 FREETMPS;
1756 LEAVE;
1757 }
1758 }
1759 }
1760}
1761
1762INLINE void
1409prepare_cede (pTHX_ struct transfer_args *ta) 1763prepare_cede (pTHX_ struct coro_transfer_args *ta)
1410{ 1764{
1411 api_ready (coro_current); 1765 api_ready (aTHX_ coro_current);
1412 prepare_schedule (aTHX_ ta); 1766 prepare_schedule (aTHX_ ta);
1413} 1767}
1414 1768
1769INLINE void
1770prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1771{
1772 SV *prev = SvRV (coro_current);
1773
1774 if (coro_nready)
1775 {
1776 prepare_schedule (aTHX_ ta);
1777 api_ready (aTHX_ prev);
1778 }
1779 else
1780 prepare_nop (aTHX_ ta);
1781}
1782
1783static void
1784api_schedule (pTHX)
1785{
1786 struct coro_transfer_args ta;
1787
1788 prepare_schedule (aTHX_ &ta);
1789 TRANSFER (ta, 1);
1790}
1791
1792static void
1793api_schedule_to (pTHX_ SV *coro_sv)
1794{
1795 struct coro_transfer_args ta;
1796 struct coro *next = SvSTATE (coro_sv);
1797
1798 SvREFCNT_inc_NN (coro_sv);
1799 prepare_schedule_to (aTHX_ &ta, next);
1800}
1801
1415static int 1802static int
1416prepare_cede_notself (pTHX_ struct transfer_args *ta) 1803api_cede (pTHX)
1417{ 1804{
1418 if (coro_nready) 1805 struct coro_transfer_args ta;
1419 { 1806
1420 SV *prev = SvRV (coro_current);
1421 prepare_schedule (aTHX_ ta); 1807 prepare_cede (aTHX_ &ta);
1422 api_ready (prev); 1808
1809 if (expect_true (ta.prev != ta.next))
1810 {
1811 TRANSFER (ta, 1);
1423 return 1; 1812 return 1;
1424 } 1813 }
1425 else 1814 else
1426 return 0; 1815 return 0;
1427} 1816}
1428 1817
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 1818static int
1440api_cede (void) 1819api_cede_notself (pTHX)
1441{ 1820{
1442 dTHX; 1821 if (coro_nready)
1822 {
1443 struct transfer_args ta; 1823 struct coro_transfer_args ta;
1444 1824
1445 prepare_cede (aTHX_ &ta); 1825 prepare_cede_notself (aTHX_ &ta);
1446
1447 if (expect_true (ta.prev != ta.next))
1448 {
1449 TRANSFER (ta); 1826 TRANSFER (ta, 1);
1450 return 1; 1827 return 1;
1451 } 1828 }
1452 else 1829 else
1453 return 0; 1830 return 0;
1454} 1831}
1455 1832
1456static int 1833static 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) 1834api_trace (pTHX_ SV *coro_sv, int flags)
1473{ 1835{
1474 dTHX;
1475 struct coro *coro = SvSTATE (coro_sv); 1836 struct coro *coro = SvSTATE (coro_sv);
1476 1837
1838 if (coro->flags & CF_RUNNING)
1839 croak ("cannot enable tracing on a running coroutine, caught");
1840
1477 if (flags & CC_TRACE) 1841 if (flags & CC_TRACE)
1478 { 1842 {
1479 if (!coro->cctx) 1843 if (!coro->cctx)
1480 coro->cctx = cctx_new (); 1844 coro->cctx = cctx_new_run ();
1481 else if (!(coro->cctx->flags & CC_TRACE)) 1845 else if (!(coro->cctx->flags & CC_TRACE))
1482 croak ("cannot enable tracing on coroutine with custom stack"); 1846 croak ("cannot enable tracing on coroutine with custom stack, caught");
1483 1847
1484 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1848 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1485 } 1849 }
1486 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1850 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487 { 1851 {
… …
1492 else 1856 else
1493 coro->slot->runops = RUNOPS_DEFAULT; 1857 coro->slot->runops = RUNOPS_DEFAULT;
1494 } 1858 }
1495} 1859}
1496 1860
1861static void
1862coro_call_on_destroy (pTHX_ struct coro *coro)
1863{
1864 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1865 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1866
1867 if (on_destroyp)
1868 {
1869 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1870
1871 while (AvFILLp (on_destroy) >= 0)
1872 {
1873 dSP; /* don't disturb outer sp */
1874 SV *cb = av_pop (on_destroy);
1875
1876 PUSHMARK (SP);
1877
1878 if (statusp)
1879 {
1880 int i;
1881 AV *status = (AV *)SvRV (*statusp);
1882 EXTEND (SP, AvFILLp (status) + 1);
1883
1884 for (i = 0; i <= AvFILLp (status); ++i)
1885 PUSHs (AvARRAY (status)[i]);
1886 }
1887
1888 PUTBACK;
1889 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1890 }
1891 }
1892}
1893
1894static void
1895slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1896{
1897 int i;
1898 HV *hv = (HV *)SvRV (coro_current);
1899 AV *av = newAV ();
1900
1901 av_extend (av, items - 1);
1902 for (i = 0; i < items; ++i)
1903 av_push (av, SvREFCNT_inc_NN (arg [i]));
1904
1905 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1906
1907 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1908 api_ready (aTHX_ sv_manager);
1909
1910 frame->prepare = prepare_schedule;
1911 frame->check = slf_check_repeat;
1912
1913 /* as a minor optimisation, we could unwind all stacks here */
1914 /* but that puts extra pressure on pp_slf, and is not worth much */
1915 /*coro_unwind_stacks (aTHX);*/
1916}
1917
1918/*****************************************************************************/
1919/* async pool handler */
1920
1921static int
1922slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = (struct coro *)frame->data;
1926
1927 if (!coro->invoke_cb)
1928 return 1; /* loop till we have invoke */
1929 else
1930 {
1931 hv_store (hv, "desc", sizeof ("desc") - 1,
1932 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1933
1934 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1935
1936 {
1937 dSP;
1938 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1939 PUTBACK;
1940 }
1941
1942 SvREFCNT_dec (GvAV (PL_defgv));
1943 GvAV (PL_defgv) = coro->invoke_av;
1944 coro->invoke_av = 0;
1945
1946 return 0;
1947 }
1948}
1949
1950static void
1951slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1952{
1953 HV *hv = (HV *)SvRV (coro_current);
1954 struct coro *coro = SvSTATE_hv ((SV *)hv);
1955
1956 if (expect_true (coro->saved_deffh))
1957 {
1958 /* subsequent iteration */
1959 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1960 coro->saved_deffh = 0;
1961
1962 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1963 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1964 {
1965 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1966 coro->invoke_av = newAV ();
1967
1968 frame->prepare = prepare_nop;
1969 }
1970 else
1971 {
1972 av_clear (GvAV (PL_defgv));
1973 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1974
1975 coro->prio = 0;
1976
1977 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1978 api_trace (aTHX_ coro_current, 0);
1979
1980 frame->prepare = prepare_schedule;
1981 av_push (av_async_pool, SvREFCNT_inc (hv));
1982 }
1983 }
1984 else
1985 {
1986 /* first iteration, simply fall through */
1987 frame->prepare = prepare_nop;
1988 }
1989
1990 frame->check = slf_check_pool_handler;
1991 frame->data = (void *)coro;
1992}
1993
1994/*****************************************************************************/
1995/* rouse callback */
1996
1997#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1998
1999static void
2000coro_rouse_callback (pTHX_ CV *cv)
2001{
2002 dXSARGS;
2003 SV *data = (SV *)GENSUB_ARG;
2004
2005 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2006 {
2007 /* first call, set args */
2008 SV *coro = SvRV (data);
2009 AV *av = newAV ();
2010
2011 SvRV_set (data, (SV *)av);
2012
2013 /* better take a full copy of the arguments */
2014 while (items--)
2015 av_store (av, items, newSVsv (ST (items)));
2016
2017 api_ready (aTHX_ coro);
2018 SvREFCNT_dec (coro);
2019 }
2020
2021 XSRETURN_EMPTY;
2022}
2023
2024static int
2025slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2026{
2027 SV *data = (SV *)frame->data;
2028
2029 if (CORO_THROW)
2030 return 0;
2031
2032 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2033 return 1;
2034
2035 /* now push all results on the stack */
2036 {
2037 dSP;
2038 AV *av = (AV *)SvRV (data);
2039 int i;
2040
2041 EXTEND (SP, AvFILLp (av) + 1);
2042 for (i = 0; i <= AvFILLp (av); ++i)
2043 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2044
2045 /* we have stolen the elements, so set length to zero and free */
2046 AvFILLp (av) = -1;
2047 av_undef (av);
2048
2049 PUTBACK;
2050 }
2051
2052 return 0;
2053}
2054
2055static void
2056slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2057{
2058 SV *cb;
2059
2060 if (items)
2061 cb = arg [0];
2062 else
2063 {
2064 struct coro *coro = SvSTATE_current;
2065
2066 if (!coro->rouse_cb)
2067 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2068
2069 cb = sv_2mortal (coro->rouse_cb);
2070 coro->rouse_cb = 0;
2071 }
2072
2073 if (!SvROK (cb)
2074 || SvTYPE (SvRV (cb)) != SVt_PVCV
2075 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2076 croak ("Coro::rouse_wait called with illegal callback argument,");
2077
2078 {
2079 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2080 SV *data = (SV *)GENSUB_ARG;
2081
2082 frame->data = (void *)data;
2083 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2084 frame->check = slf_check_rouse_wait;
2085 }
2086}
2087
2088static SV *
2089coro_new_rouse_cb (pTHX)
2090{
2091 HV *hv = (HV *)SvRV (coro_current);
2092 struct coro *coro = SvSTATE_hv (hv);
2093 SV *data = newRV_inc ((SV *)hv);
2094 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2095
2096 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2097 SvREFCNT_dec (data); /* magicext increases the refcount */
2098
2099 SvREFCNT_dec (coro->rouse_cb);
2100 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2101
2102 return cb;
2103}
2104
2105/*****************************************************************************/
2106/* schedule-like-function opcode (SLF) */
2107
2108static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2109static const CV *slf_cv;
2110static SV **slf_argv;
2111static int slf_argc, slf_arga; /* count, allocated */
2112static I32 slf_ax; /* top of stack, for restore */
2113
2114/* this restores the stack in the case we patched the entersub, to */
2115/* recreate the stack frame as perl will on following calls */
2116/* since entersub cleared the stack */
2117static OP *
2118pp_restore (pTHX)
2119{
2120 int i;
2121 SV **SP = PL_stack_base + slf_ax;
2122
2123 PUSHMARK (SP);
2124
2125 EXTEND (SP, slf_argc + 1);
2126
2127 for (i = 0; i < slf_argc; ++i)
2128 PUSHs (sv_2mortal (slf_argv [i]));
2129
2130 PUSHs ((SV *)CvGV (slf_cv));
2131
2132 RETURNOP (slf_restore.op_first);
2133}
2134
2135static void
2136slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2137{
2138 SV **arg = (SV **)slf_frame.data;
2139
2140 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2141}
2142
2143static void
2144slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2145{
2146 if (items != 2)
2147 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2148
2149 frame->prepare = slf_prepare_transfer;
2150 frame->check = slf_check_nop;
2151 frame->data = (void *)arg; /* let's hope it will stay valid */
2152}
2153
2154static void
2155slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2156{
2157 frame->prepare = prepare_schedule;
2158 frame->check = slf_check_nop;
2159}
2160
2161static void
2162slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2163{
2164 struct coro *next = (struct coro *)slf_frame.data;
2165
2166 SvREFCNT_inc_NN (next->hv);
2167 prepare_schedule_to (aTHX_ ta, next);
2168}
2169
2170static void
2171slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2172{
2173 if (!items)
2174 croak ("Coro::schedule_to expects a coroutine argument, caught");
2175
2176 frame->data = (void *)SvSTATE (arg [0]);
2177 frame->prepare = slf_prepare_schedule_to;
2178 frame->check = slf_check_nop;
2179}
2180
2181static void
2182slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2183{
2184 api_ready (aTHX_ SvRV (coro_current));
2185
2186 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2187}
2188
2189static void
2190slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2191{
2192 frame->prepare = prepare_cede;
2193 frame->check = slf_check_nop;
2194}
2195
2196static void
2197slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2198{
2199 frame->prepare = prepare_cede_notself;
2200 frame->check = slf_check_nop;
2201}
2202
2203/*
2204 * these not obviously related functions are all rolled into one
2205 * function to increase chances that they all will call transfer with the same
2206 * stack offset
2207 * SLF stands for "schedule-like-function".
2208 */
2209static OP *
2210pp_slf (pTHX)
2211{
2212 I32 checkmark; /* mark SP to see how many elements check has pushed */
2213
2214 /* set up the slf frame, unless it has already been set-up */
2215 /* the latter happens when a new coro has been started */
2216 /* or when a new cctx was attached to an existing coroutine */
2217 if (expect_true (!slf_frame.prepare))
2218 {
2219 /* first iteration */
2220 dSP;
2221 SV **arg = PL_stack_base + TOPMARK + 1;
2222 int items = SP - arg; /* args without function object */
2223 SV *gv = *sp;
2224
2225 /* do a quick consistency check on the "function" object, and if it isn't */
2226 /* for us, divert to the real entersub */
2227 if (SvTYPE (gv) != SVt_PVGV
2228 || !GvCV (gv)
2229 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2230 return PL_ppaddr[OP_ENTERSUB](aTHX);
2231
2232 if (!(PL_op->op_flags & OPf_STACKED))
2233 {
2234 /* ampersand-form of call, use @_ instead of stack */
2235 AV *av = GvAV (PL_defgv);
2236 arg = AvARRAY (av);
2237 items = AvFILLp (av) + 1;
2238 }
2239
2240 /* now call the init function, which needs to set up slf_frame */
2241 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2242 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2243
2244 /* pop args */
2245 SP = PL_stack_base + POPMARK;
2246
2247 PUTBACK;
2248 }
2249
2250 /* now that we have a slf_frame, interpret it! */
2251 /* we use a callback system not to make the code needlessly */
2252 /* complicated, but so we can run multiple perl coros from one cctx */
2253
2254 do
2255 {
2256 struct coro_transfer_args ta;
2257
2258 slf_frame.prepare (aTHX_ &ta);
2259 TRANSFER (ta, 0);
2260
2261 checkmark = PL_stack_sp - PL_stack_base;
2262 }
2263 while (slf_frame.check (aTHX_ &slf_frame));
2264
2265 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2266
2267 /* exception handling */
2268 if (expect_false (CORO_THROW))
2269 {
2270 SV *exception = sv_2mortal (CORO_THROW);
2271
2272 CORO_THROW = 0;
2273 sv_setsv (ERRSV, exception);
2274 croak (0);
2275 }
2276
2277 /* return value handling - mostly like entersub */
2278 /* make sure we put something on the stack in scalar context */
2279 if (GIMME_V == G_SCALAR)
2280 {
2281 dSP;
2282 SV **bot = PL_stack_base + checkmark;
2283
2284 if (sp == bot) /* too few, push undef */
2285 bot [1] = &PL_sv_undef;
2286 else if (sp != bot + 1) /* too many, take last one */
2287 bot [1] = *sp;
2288
2289 SP = bot + 1;
2290
2291 PUTBACK;
2292 }
2293
2294 return NORMAL;
2295}
2296
2297static void
2298api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2299{
2300 int i;
2301 SV **arg = PL_stack_base + ax;
2302 int items = PL_stack_sp - arg + 1;
2303
2304 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2305
2306 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2307 && PL_op->op_ppaddr != pp_slf)
2308 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2309
2310 CvFLAGS (cv) |= CVf_SLF;
2311 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2312 slf_cv = cv;
2313
2314 /* we patch the op, and then re-run the whole call */
2315 /* we have to put the same argument on the stack for this to work */
2316 /* and this will be done by pp_restore */
2317 slf_restore.op_next = (OP *)&slf_restore;
2318 slf_restore.op_type = OP_CUSTOM;
2319 slf_restore.op_ppaddr = pp_restore;
2320 slf_restore.op_first = PL_op;
2321
2322 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2323
2324 if (PL_op->op_flags & OPf_STACKED)
2325 {
2326 if (items > slf_arga)
2327 {
2328 slf_arga = items;
2329 free (slf_argv);
2330 slf_argv = malloc (slf_arga * sizeof (SV *));
2331 }
2332
2333 slf_argc = items;
2334
2335 for (i = 0; i < items; ++i)
2336 slf_argv [i] = SvREFCNT_inc (arg [i]);
2337 }
2338 else
2339 slf_argc = 0;
2340
2341 PL_op->op_ppaddr = pp_slf;
2342 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2343
2344 PL_op = (OP *)&slf_restore;
2345}
2346
2347/*****************************************************************************/
2348/* dynamic wind */
2349
2350static void
2351on_enterleave_call (pTHX_ SV *cb)
2352{
2353 dSP;
2354
2355 PUSHSTACK;
2356
2357 PUSHMARK (SP);
2358 PUTBACK;
2359 call_sv (cb, G_VOID | G_DISCARD);
2360 SPAGAIN;
2361
2362 POPSTACK;
2363}
2364
2365static SV *
2366coro_avp_pop_and_free (pTHX_ AV **avp)
2367{
2368 AV *av = *avp;
2369 SV *res = av_pop (av);
2370
2371 if (AvFILLp (av) < 0)
2372 {
2373 *avp = 0;
2374 SvREFCNT_dec (av);
2375 }
2376
2377 return res;
2378}
2379
2380static void
2381coro_pop_on_enter (pTHX_ void *coro)
2382{
2383 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2384 SvREFCNT_dec (cb);
2385}
2386
2387static void
2388coro_pop_on_leave (pTHX_ void *coro)
2389{
2390 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2391 on_enterleave_call (aTHX_ sv_2mortal (cb));
2392}
2393
2394/*****************************************************************************/
2395/* PerlIO::cede */
2396
2397typedef struct
2398{
2399 PerlIOBuf base;
2400 NV next, every;
2401} PerlIOCede;
2402
2403static IV
2404PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2405{
2406 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2407
2408 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2409 self->next = nvtime () + self->every;
2410
2411 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2412}
2413
2414static SV *
2415PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2416{
2417 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2418
2419 return newSVnv (self->every);
2420}
2421
2422static IV
2423PerlIOCede_flush (pTHX_ PerlIO *f)
2424{
2425 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2426 double now = nvtime ();
2427
2428 if (now >= self->next)
2429 {
2430 api_cede (aTHX);
2431 self->next = now + self->every;
2432 }
2433
2434 return PerlIOBuf_flush (aTHX_ f);
2435}
2436
2437static PerlIO_funcs PerlIO_cede =
2438{
2439 sizeof(PerlIO_funcs),
2440 "cede",
2441 sizeof(PerlIOCede),
2442 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2443 PerlIOCede_pushed,
2444 PerlIOBuf_popped,
2445 PerlIOBuf_open,
2446 PerlIOBase_binmode,
2447 PerlIOCede_getarg,
2448 PerlIOBase_fileno,
2449 PerlIOBuf_dup,
2450 PerlIOBuf_read,
2451 PerlIOBuf_unread,
2452 PerlIOBuf_write,
2453 PerlIOBuf_seek,
2454 PerlIOBuf_tell,
2455 PerlIOBuf_close,
2456 PerlIOCede_flush,
2457 PerlIOBuf_fill,
2458 PerlIOBase_eof,
2459 PerlIOBase_error,
2460 PerlIOBase_clearerr,
2461 PerlIOBase_setlinebuf,
2462 PerlIOBuf_get_base,
2463 PerlIOBuf_bufsiz,
2464 PerlIOBuf_get_ptr,
2465 PerlIOBuf_get_cnt,
2466 PerlIOBuf_set_ptrcnt,
2467};
2468
2469/*****************************************************************************/
2470/* Coro::Semaphore & Coro::Signal */
2471
2472static SV *
2473coro_waitarray_new (pTHX_ int count)
2474{
2475 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2476 AV *av = newAV ();
2477 SV **ary;
2478
2479 /* unfortunately, building manually saves memory */
2480 Newx (ary, 2, SV *);
2481 AvALLOC (av) = ary;
2482#if PERL_VERSION_ATLEAST (5,10,0)
2483 AvARRAY (av) = ary;
2484#else
2485 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2486 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2487 SvPVX ((SV *)av) = (char *)ary;
2488#endif
2489 AvMAX (av) = 1;
2490 AvFILLp (av) = 0;
2491 ary [0] = newSViv (count);
2492
2493 return newRV_noinc ((SV *)av);
2494}
2495
2496/* semaphore */
2497
2498static void
2499coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2500{
2501 SV *count_sv = AvARRAY (av)[0];
2502 IV count = SvIVX (count_sv);
2503
2504 count += adjust;
2505 SvIVX (count_sv) = count;
2506
2507 /* now wake up as many waiters as are expected to lock */
2508 while (count > 0 && AvFILLp (av) > 0)
2509 {
2510 SV *cb;
2511
2512 /* swap first two elements so we can shift a waiter */
2513 AvARRAY (av)[0] = AvARRAY (av)[1];
2514 AvARRAY (av)[1] = count_sv;
2515 cb = av_shift (av);
2516
2517 if (SvOBJECT (cb))
2518 {
2519 api_ready (aTHX_ cb);
2520 --count;
2521 }
2522 else if (SvTYPE (cb) == SVt_PVCV)
2523 {
2524 dSP;
2525 PUSHMARK (SP);
2526 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2527 PUTBACK;
2528 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2529 }
2530
2531 SvREFCNT_dec (cb);
2532 }
2533}
2534
2535static void
2536coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2537{
2538 /* call $sem->adjust (0) to possibly wake up some other waiters */
2539 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2540}
2541
2542static int
2543slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2544{
2545 AV *av = (AV *)frame->data;
2546 SV *count_sv = AvARRAY (av)[0];
2547
2548 /* if we are about to throw, don't actually acquire the lock, just throw */
2549 if (CORO_THROW)
2550 return 0;
2551 else if (SvIVX (count_sv) > 0)
2552 {
2553 SvSTATE_current->on_destroy = 0;
2554
2555 if (acquire)
2556 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2557 else
2558 coro_semaphore_adjust (aTHX_ av, 0);
2559
2560 return 0;
2561 }
2562 else
2563 {
2564 int i;
2565 /* if we were woken up but can't down, we look through the whole */
2566 /* waiters list and only add us if we aren't in there already */
2567 /* this avoids some degenerate memory usage cases */
2568
2569 for (i = 1; i <= AvFILLp (av); ++i)
2570 if (AvARRAY (av)[i] == SvRV (coro_current))
2571 return 1;
2572
2573 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2574 return 1;
2575 }
2576}
2577
2578static int
2579slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2580{
2581 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2582}
2583
2584static int
2585slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2586{
2587 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2588}
2589
2590static void
2591slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2592{
2593 AV *av = (AV *)SvRV (arg [0]);
2594
2595 if (SvIVX (AvARRAY (av)[0]) > 0)
2596 {
2597 frame->data = (void *)av;
2598 frame->prepare = prepare_nop;
2599 }
2600 else
2601 {
2602 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2603
2604 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2605 frame->prepare = prepare_schedule;
2606
2607 /* to avoid race conditions when a woken-up coro gets terminated */
2608 /* we arrange for a temporary on_destroy that calls adjust (0) */
2609 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2610 }
2611}
2612
2613static void
2614slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2615{
2616 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2617 frame->check = slf_check_semaphore_down;
2618}
2619
2620static void
2621slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2622{
2623 if (items >= 2)
2624 {
2625 /* callback form */
2626 AV *av = (AV *)SvRV (arg [0]);
2627 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2628
2629 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2630
2631 if (SvIVX (AvARRAY (av)[0]) > 0)
2632 coro_semaphore_adjust (aTHX_ av, 0);
2633
2634 frame->prepare = prepare_nop;
2635 frame->check = slf_check_nop;
2636 }
2637 else
2638 {
2639 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2640 frame->check = slf_check_semaphore_wait;
2641 }
2642}
2643
2644/* signal */
2645
2646static void
2647coro_signal_wake (pTHX_ AV *av, int count)
2648{
2649 SvIVX (AvARRAY (av)[0]) = 0;
2650
2651 /* now signal count waiters */
2652 while (count > 0 && AvFILLp (av) > 0)
2653 {
2654 SV *cb;
2655
2656 /* swap first two elements so we can shift a waiter */
2657 cb = AvARRAY (av)[0];
2658 AvARRAY (av)[0] = AvARRAY (av)[1];
2659 AvARRAY (av)[1] = cb;
2660
2661 cb = av_shift (av);
2662
2663 api_ready (aTHX_ cb);
2664 sv_setiv (cb, 0); /* signal waiter */
2665 SvREFCNT_dec (cb);
2666
2667 --count;
2668 }
2669}
2670
2671static int
2672slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2673{
2674 /* if we are about to throw, also stop waiting */
2675 return SvROK ((SV *)frame->data) && !CORO_THROW;
2676}
2677
2678static void
2679slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2680{
2681 AV *av = (AV *)SvRV (arg [0]);
2682
2683 if (SvIVX (AvARRAY (av)[0]))
2684 {
2685 SvIVX (AvARRAY (av)[0]) = 0;
2686 frame->prepare = prepare_nop;
2687 frame->check = slf_check_nop;
2688 }
2689 else
2690 {
2691 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2692
2693 av_push (av, waiter);
2694
2695 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2696 frame->prepare = prepare_schedule;
2697 frame->check = slf_check_signal_wait;
2698 }
2699}
2700
2701/*****************************************************************************/
2702/* Coro::AIO */
2703
2704#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2705
2706/* helper storage struct */
2707struct io_state
2708{
2709 int errorno;
2710 I32 laststype; /* U16 in 5.10.0 */
2711 int laststatval;
2712 Stat_t statcache;
2713};
2714
2715static void
2716coro_aio_callback (pTHX_ CV *cv)
2717{
2718 dXSARGS;
2719 AV *state = (AV *)GENSUB_ARG;
2720 SV *coro = av_pop (state);
2721 SV *data_sv = newSV (sizeof (struct io_state));
2722
2723 av_extend (state, items - 1);
2724
2725 sv_upgrade (data_sv, SVt_PV);
2726 SvCUR_set (data_sv, sizeof (struct io_state));
2727 SvPOK_only (data_sv);
2728
2729 {
2730 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2731
2732 data->errorno = errno;
2733 data->laststype = PL_laststype;
2734 data->laststatval = PL_laststatval;
2735 data->statcache = PL_statcache;
2736 }
2737
2738 /* now build the result vector out of all the parameters and the data_sv */
2739 {
2740 int i;
2741
2742 for (i = 0; i < items; ++i)
2743 av_push (state, SvREFCNT_inc_NN (ST (i)));
2744 }
2745
2746 av_push (state, data_sv);
2747
2748 api_ready (aTHX_ coro);
2749 SvREFCNT_dec (coro);
2750 SvREFCNT_dec ((AV *)state);
2751}
2752
2753static int
2754slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2755{
2756 AV *state = (AV *)frame->data;
2757
2758 /* if we are about to throw, return early */
2759 /* this does not cancel the aio request, but at least */
2760 /* it quickly returns */
2761 if (CORO_THROW)
2762 return 0;
2763
2764 /* one element that is an RV? repeat! */
2765 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2766 return 1;
2767
2768 /* restore status */
2769 {
2770 SV *data_sv = av_pop (state);
2771 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2772
2773 errno = data->errorno;
2774 PL_laststype = data->laststype;
2775 PL_laststatval = data->laststatval;
2776 PL_statcache = data->statcache;
2777
2778 SvREFCNT_dec (data_sv);
2779 }
2780
2781 /* push result values */
2782 {
2783 dSP;
2784 int i;
2785
2786 EXTEND (SP, AvFILLp (state) + 1);
2787 for (i = 0; i <= AvFILLp (state); ++i)
2788 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2789
2790 PUTBACK;
2791 }
2792
2793 return 0;
2794}
2795
2796static void
2797slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2798{
2799 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2800 SV *coro_hv = SvRV (coro_current);
2801 struct coro *coro = SvSTATE_hv (coro_hv);
2802
2803 /* put our coroutine id on the state arg */
2804 av_push (state, SvREFCNT_inc_NN (coro_hv));
2805
2806 /* first see whether we have a non-zero priority and set it as AIO prio */
2807 if (coro->prio)
2808 {
2809 dSP;
2810
2811 static SV *prio_cv;
2812 static SV *prio_sv;
2813
2814 if (expect_false (!prio_cv))
2815 {
2816 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2817 prio_sv = newSViv (0);
2818 }
2819
2820 PUSHMARK (SP);
2821 sv_setiv (prio_sv, coro->prio);
2822 XPUSHs (prio_sv);
2823
2824 PUTBACK;
2825 call_sv (prio_cv, G_VOID | G_DISCARD);
2826 }
2827
2828 /* now call the original request */
2829 {
2830 dSP;
2831 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2832 int i;
2833
2834 PUSHMARK (SP);
2835
2836 /* first push all args to the stack */
2837 EXTEND (SP, items + 1);
2838
2839 for (i = 0; i < items; ++i)
2840 PUSHs (arg [i]);
2841
2842 /* now push the callback closure */
2843 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2844
2845 /* now call the AIO function - we assume our request is uncancelable */
2846 PUTBACK;
2847 call_sv ((SV *)req, G_VOID | G_DISCARD);
2848 }
2849
2850 /* now that the requets is going, we loop toll we have a result */
2851 frame->data = (void *)state;
2852 frame->prepare = prepare_schedule;
2853 frame->check = slf_check_aio_req;
2854}
2855
2856static void
2857coro_aio_req_xs (pTHX_ CV *cv)
2858{
2859 dXSARGS;
2860
2861 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2862
2863 XSRETURN_EMPTY;
2864}
2865
2866/*****************************************************************************/
2867
2868#if CORO_CLONE
2869# include "clone.c"
2870#endif
2871
1497MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2872MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1498 2873
1499PROTOTYPES: DISABLE 2874PROTOTYPES: DISABLE
1500 2875
1501BOOT: 2876BOOT:
1502{ 2877{
1503#ifdef USE_ITHREADS 2878#ifdef USE_ITHREADS
1504 MUTEX_INIT (&coro_mutex); 2879# if CORO_PTHREAD
2880 coro_thx = PERL_GET_CONTEXT;
2881# endif
1505#endif 2882#endif
1506 BOOT_PAGESIZE; 2883 BOOT_PAGESIZE;
2884
2885 cctx_current = cctx_new_empty ();
1507 2886
1508 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2887 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1509 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2888 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1510 2889
2890 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2891 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2892 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2893
1511 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2894 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1512 sv_diehook = coro_get_sv (aTHX_ "Coro::State::DIEHOOK" , TRUE); 2895 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1513 sv_warnhook = coro_get_sv (aTHX_ "Coro::State::WARNHOOK", TRUE); 2896 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 2897
1518 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2898 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1519 2899
1520 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2900 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1521 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2901 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1526 main_top_env = PL_top_env; 2906 main_top_env = PL_top_env;
1527 2907
1528 while (main_top_env->je_prev) 2908 while (main_top_env->je_prev)
1529 main_top_env = main_top_env->je_prev; 2909 main_top_env = main_top_env->je_prev;
1530 2910
2911 {
2912 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2913
2914 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2915 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2916
2917 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2918 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2919 }
2920
1531 coroapi.ver = CORO_API_VERSION; 2921 coroapi.ver = CORO_API_VERSION;
1532 coroapi.rev = CORO_API_REVISION; 2922 coroapi.rev = CORO_API_REVISION;
2923
1533 coroapi.transfer = api_transfer; 2924 coroapi.transfer = api_transfer;
2925
2926 coroapi.sv_state = SvSTATE_;
2927 coroapi.execute_slf = api_execute_slf;
2928 coroapi.prepare_nop = prepare_nop;
2929 coroapi.prepare_schedule = prepare_schedule;
2930 coroapi.prepare_cede = prepare_cede;
2931 coroapi.prepare_cede_notself = prepare_cede_notself;
2932
2933 {
2934 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2935
2936 if (!svp) croak ("Time::HiRes is required");
2937 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2938
2939 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2940 }
1534 2941
1535 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2942 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1536} 2943}
1537 2944
1538SV * 2945SV *
1539new (char *klass, ...) 2946new (char *klass, ...)
2947 ALIAS:
2948 Coro::new = 1
1540 CODE: 2949 CODE:
1541{ 2950{
1542 struct coro *coro; 2951 struct coro *coro;
2952 MAGIC *mg;
1543 HV *hv; 2953 HV *hv;
2954 CV *cb;
1544 int i; 2955 int i;
2956
2957 if (items > 1)
2958 {
2959 cb = coro_sv_2cv (aTHX_ ST (1));
2960
2961 if (!ix)
2962 {
2963 if (CvISXSUB (cb))
2964 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2965
2966 if (!CvROOT (cb))
2967 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2968 }
2969 }
1545 2970
1546 Newz (0, coro, 1, struct coro); 2971 Newz (0, coro, 1, struct coro);
1547 coro->args = newAV (); 2972 coro->args = newAV ();
1548 coro->flags = CF_NEW; 2973 coro->flags = CF_NEW;
1549 2974
1550 if (coro_first) coro_first->prev = coro; 2975 if (coro_first) coro_first->prev = coro;
1551 coro->next = coro_first; 2976 coro->next = coro_first;
1552 coro_first = coro; 2977 coro_first = coro;
1553 2978
1554 coro->hv = hv = newHV (); 2979 coro->hv = hv = newHV ();
1555 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2980 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2981 mg->mg_flags |= MGf_DUP;
1556 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2982 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1557 2983
2984 if (items > 1)
2985 {
1558 av_extend (coro->args, items - 1); 2986 av_extend (coro->args, items - 1 + ix - 1);
2987
2988 if (ix)
2989 {
2990 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2991 cb = cv_coro_run;
2992 }
2993
2994 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2995
1559 for (i = 1; i < items; i++) 2996 for (i = 2; i < items; i++)
1560 av_push (coro->args, newSVsv (ST (i))); 2997 av_push (coro->args, newSVsv (ST (i)));
2998 }
1561} 2999}
1562 OUTPUT: 3000 OUTPUT:
1563 RETVAL 3001 RETVAL
1564 3002
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 3003void
1569_set_stacklevel (...) 3004transfer (...)
1570 ALIAS: 3005 PROTOTYPE: $$
1571 Coro::State::transfer = 1 3006 CODE:
1572 Coro::schedule = 2 3007 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 3008
1615bool 3009bool
1616_destroy (SV *coro_sv) 3010_destroy (SV *coro_sv)
1617 CODE: 3011 CODE:
1618 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 3012 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1619 OUTPUT: 3013 OUTPUT:
1620 RETVAL 3014 RETVAL
1621 3015
1622void 3016void
1623_exit (code) 3017_exit (int code)
1624 int code
1625 PROTOTYPE: $ 3018 PROTOTYPE: $
1626 CODE: 3019 CODE:
1627 _exit (code); 3020 _exit (code);
1628 3021
3022SV *
3023clone (Coro::State coro)
3024 CODE:
3025{
3026#if CORO_CLONE
3027 struct coro *ncoro = coro_clone (aTHX_ coro);
3028 MAGIC *mg;
3029 /* TODO: too much duplication */
3030 ncoro->hv = newHV ();
3031 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3032 mg->mg_flags |= MGf_DUP;
3033 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3034#else
3035 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3036#endif
3037}
3038 OUTPUT:
3039 RETVAL
3040
1629int 3041int
1630cctx_stacksize (int new_stacksize = 0) 3042cctx_stacksize (int new_stacksize = 0)
3043 PROTOTYPE: ;$
1631 CODE: 3044 CODE:
1632 RETVAL = coro_stacksize; 3045 RETVAL = cctx_stacksize;
1633 if (new_stacksize) 3046 if (new_stacksize)
3047 {
1634 coro_stacksize = new_stacksize; 3048 cctx_stacksize = new_stacksize;
3049 ++cctx_gen;
3050 }
1635 OUTPUT: 3051 OUTPUT:
1636 RETVAL 3052 RETVAL
1637 3053
1638int 3054int
3055cctx_max_idle (int max_idle = 0)
3056 PROTOTYPE: ;$
3057 CODE:
3058 RETVAL = cctx_max_idle;
3059 if (max_idle > 1)
3060 cctx_max_idle = max_idle;
3061 OUTPUT:
3062 RETVAL
3063
3064int
1639cctx_count () 3065cctx_count ()
3066 PROTOTYPE:
1640 CODE: 3067 CODE:
1641 RETVAL = cctx_count; 3068 RETVAL = cctx_count;
1642 OUTPUT: 3069 OUTPUT:
1643 RETVAL 3070 RETVAL
1644 3071
1645int 3072int
1646cctx_idle () 3073cctx_idle ()
3074 PROTOTYPE:
1647 CODE: 3075 CODE:
1648 RETVAL = cctx_idle; 3076 RETVAL = cctx_idle;
1649 OUTPUT: 3077 OUTPUT:
1650 RETVAL 3078 RETVAL
1651 3079
1652void 3080void
1653list () 3081list ()
3082 PROTOTYPE:
1654 PPCODE: 3083 PPCODE:
1655{ 3084{
1656 struct coro *coro; 3085 struct coro *coro;
1657 for (coro = coro_first; coro; coro = coro->next) 3086 for (coro = coro_first; coro; coro = coro->next)
1658 if (coro->hv) 3087 if (coro->hv)
… …
1663call (Coro::State coro, SV *coderef) 3092call (Coro::State coro, SV *coderef)
1664 ALIAS: 3093 ALIAS:
1665 eval = 1 3094 eval = 1
1666 CODE: 3095 CODE:
1667{ 3096{
1668 if (coro->mainstack) 3097 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1669 { 3098 {
1670 struct coro temp; 3099 struct coro *current = SvSTATE_current;
1671 3100
1672 if (!(coro->flags & CF_RUNNING)) 3101 if (current != coro)
1673 { 3102 {
3103 PUTBACK;
1674 save_perl (aTHX_ &temp); 3104 save_perl (aTHX_ current);
1675 load_perl (aTHX_ coro); 3105 load_perl (aTHX_ coro);
3106 SPAGAIN;
1676 } 3107 }
1677 3108
1678 {
1679 dSP;
1680 ENTER;
1681 SAVETMPS;
1682 PUTBACK;
1683 PUSHSTACK; 3109 PUSHSTACK;
3110
1684 PUSHMARK (SP); 3111 PUSHMARK (SP);
3112 PUTBACK;
1685 3113
1686 if (ix) 3114 if (ix)
1687 eval_sv (coderef, 0); 3115 eval_sv (coderef, 0);
1688 else 3116 else
1689 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 3117 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1690 3118
1691 POPSTACK; 3119 POPSTACK;
1692 SPAGAIN; 3120 SPAGAIN;
1693 FREETMPS;
1694 LEAVE;
1695 PUTBACK;
1696 }
1697 3121
1698 if (!(coro->flags & CF_RUNNING)) 3122 if (current != coro)
1699 { 3123 {
3124 PUTBACK;
1700 save_perl (aTHX_ coro); 3125 save_perl (aTHX_ coro);
1701 load_perl (aTHX_ &temp); 3126 load_perl (aTHX_ current);
3127 SPAGAIN;
1702 } 3128 }
1703 } 3129 }
1704} 3130}
1705 3131
1706SV * 3132SV *
… …
1709 ALIAS: 3135 ALIAS:
1710 is_ready = CF_READY 3136 is_ready = CF_READY
1711 is_running = CF_RUNNING 3137 is_running = CF_RUNNING
1712 is_new = CF_NEW 3138 is_new = CF_NEW
1713 is_destroyed = CF_DESTROYED 3139 is_destroyed = CF_DESTROYED
3140 is_suspended = CF_SUSPENDED
1714 CODE: 3141 CODE:
1715 RETVAL = boolSV (coro->flags & ix); 3142 RETVAL = boolSV (coro->flags & ix);
1716 OUTPUT: 3143 OUTPUT:
1717 RETVAL 3144 RETVAL
1718 3145
1719void 3146void
3147throw (Coro::State self, SV *throw = &PL_sv_undef)
3148 PROTOTYPE: $;$
3149 CODE:
3150{
3151 struct coro *current = SvSTATE_current;
3152 SV **throwp = self == current ? &CORO_THROW : &self->except;
3153 SvREFCNT_dec (*throwp);
3154 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3155}
3156
3157void
1720api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 3158api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3159 PROTOTYPE: $;$
3160 C_ARGS: aTHX_ coro, flags
1721 3161
1722SV * 3162SV *
1723has_stack (Coro::State coro) 3163has_cctx (Coro::State coro)
1724 PROTOTYPE: $ 3164 PROTOTYPE: $
1725 CODE: 3165 CODE:
1726 RETVAL = boolSV (!!coro->cctx); 3166 /* maybe manage the running flag differently */
3167 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1727 OUTPUT: 3168 OUTPUT:
1728 RETVAL 3169 RETVAL
1729 3170
1730int 3171int
1731is_traced (Coro::State coro) 3172is_traced (Coro::State coro)
… …
1733 CODE: 3174 CODE:
1734 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 3175 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1735 OUTPUT: 3176 OUTPUT:
1736 RETVAL 3177 RETVAL
1737 3178
1738IV 3179UV
1739rss (Coro::State coro) 3180rss (Coro::State coro)
1740 PROTOTYPE: $ 3181 PROTOTYPE: $
1741 ALIAS: 3182 ALIAS:
1742 usecount = 1 3183 usecount = 1
1743 CODE: 3184 CODE:
… …
1747 case 1: RETVAL = coro->usecount; break; 3188 case 1: RETVAL = coro->usecount; break;
1748 } 3189 }
1749 OUTPUT: 3190 OUTPUT:
1750 RETVAL 3191 RETVAL
1751 3192
3193void
3194force_cctx ()
3195 PROTOTYPE:
3196 CODE:
3197 cctx_current->idle_sp = 0;
3198
3199void
3200swap_defsv (Coro::State self)
3201 PROTOTYPE: $
3202 ALIAS:
3203 swap_defav = 1
3204 CODE:
3205 if (!self->slot)
3206 croak ("cannot swap state with coroutine that has no saved state,");
3207 else
3208 {
3209 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3210 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3211
3212 SV *tmp = *src; *src = *dst; *dst = tmp;
3213 }
3214
3215void
3216cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3220
1752 3221
1753MODULE = Coro::State PACKAGE = Coro 3222MODULE = Coro::State PACKAGE = Coro
1754 3223
1755BOOT: 3224BOOT:
1756{ 3225{
1757 int i;
1758
1759 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE); 3226 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1760 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE); 3227 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3228 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3229 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3230 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1761 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 3231 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3232 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3233 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3234 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1762 3235
1763 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 3236 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
1764 SvREADONLY_on (coro_current); 3237 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3238 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3239 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1765 3240
1766 coro_stash = gv_stashpv ("Coro", TRUE); 3241 coro_stash = gv_stashpv ("Coro", TRUE);
1767 3242
1768 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3243 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1769 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3244 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1770 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3245 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1771 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3246 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1772 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3247 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1773 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3248 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1774 3249
1775 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1776 coro_ready[i] = newAV ();
1777
1778 { 3250 {
1779 SV *sv = perl_get_sv ("Coro::API", TRUE); 3251 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1780 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1781 3252
1782 coroapi.schedule = api_schedule; 3253 coroapi.schedule = api_schedule;
3254 coroapi.schedule_to = api_schedule_to;
1783 coroapi.cede = api_cede; 3255 coroapi.cede = api_cede;
1784 coroapi.cede_notself = api_cede_notself; 3256 coroapi.cede_notself = api_cede_notself;
1785 coroapi.ready = api_ready; 3257 coroapi.ready = api_ready;
1786 coroapi.is_ready = api_is_ready; 3258 coroapi.is_ready = api_is_ready;
1787 coroapi.nready = &coro_nready; 3259 coroapi.nready = coro_nready;
1788 coroapi.current = coro_current; 3260 coroapi.current = coro_current;
1789 3261
1790 GCoroAPI = &coroapi; 3262 /*GCoroAPI = &coroapi;*/
1791 sv_setiv (sv, (IV)&coroapi); 3263 sv_setiv (sv, (IV)&coroapi);
1792 SvREADONLY_on (sv); 3264 SvREADONLY_on (sv);
1793 } 3265 }
1794} 3266}
3267
3268void
3269terminate (...)
3270 CODE:
3271 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3272
3273void
3274schedule (...)
3275 CODE:
3276 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3277
3278void
3279schedule_to (...)
3280 CODE:
3281 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3282
3283void
3284cede_to (...)
3285 CODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3287
3288void
3289cede (...)
3290 CODE:
3291 CORO_EXECUTE_SLF_XS (slf_init_cede);
3292
3293void
3294cede_notself (...)
3295 CODE:
3296 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1795 3297
1796void 3298void
1797_set_current (SV *current) 3299_set_current (SV *current)
1798 PROTOTYPE: $ 3300 PROTOTYPE: $
1799 CODE: 3301 CODE:
1800 SvREFCNT_dec (SvRV (coro_current)); 3302 SvREFCNT_dec (SvRV (coro_current));
1801 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3303 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3304
3305void
3306_set_readyhook (SV *hook)
3307 PROTOTYPE: $
3308 CODE:
3309 SvREFCNT_dec (coro_readyhook);
3310 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1802 3311
1803int 3312int
1804prio (Coro::State coro, int newprio = 0) 3313prio (Coro::State coro, int newprio = 0)
3314 PROTOTYPE: $;$
1805 ALIAS: 3315 ALIAS:
1806 nice = 1 3316 nice = 1
1807 CODE: 3317 CODE:
1808{ 3318{
1809 RETVAL = coro->prio; 3319 RETVAL = coro->prio;
… …
1824 3334
1825SV * 3335SV *
1826ready (SV *self) 3336ready (SV *self)
1827 PROTOTYPE: $ 3337 PROTOTYPE: $
1828 CODE: 3338 CODE:
1829 RETVAL = boolSV (api_ready (self)); 3339 RETVAL = boolSV (api_ready (aTHX_ self));
1830 OUTPUT: 3340 OUTPUT:
1831 RETVAL 3341 RETVAL
1832 3342
1833int 3343int
1834nready (...) 3344nready (...)
… …
1837 RETVAL = coro_nready; 3347 RETVAL = coro_nready;
1838 OUTPUT: 3348 OUTPUT:
1839 RETVAL 3349 RETVAL
1840 3350
1841void 3351void
1842throw (Coro::State self, SV *throw = &PL_sv_undef) 3352suspend (Coro::State self)
1843 PROTOTYPE: $;$ 3353 PROTOTYPE: $
1844 CODE: 3354 CODE:
1845 SvREFCNT_dec (self->throw); 3355 self->flags |= CF_SUSPENDED;
1846 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1847 3356
1848# for async_pool speedup
1849void 3357void
1850_pool_1 (SV *cb) 3358resume (Coro::State self)
3359 PROTOTYPE: $
1851 CODE: 3360 CODE:
1852{ 3361 self->flags &= ~CF_SUSPENDED;
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 3362
1860 if (!invoke) 3363void
1861 croak ("\3async_pool terminate\2\n"); 3364_pool_handler (...)
3365 CODE:
3366 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1862 3367
1863 SvREFCNT_dec (coro->saved_deffh); 3368void
1864 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv); 3369async_pool (SV *cv, ...)
3370 PROTOTYPE: &@
3371 PPCODE:
3372{
3373 HV *hv = (HV *)av_pop (av_async_pool);
3374 AV *av = newAV ();
3375 SV *cb = ST (0);
3376 int i;
1865 3377
1866 hv_store (hv, "desc", sizeof ("desc") - 1, 3378 av_extend (av, items - 2);
1867 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0); 3379 for (i = 1; i < items; ++i)
3380 av_push (av, SvREFCNT_inc_NN (ST (i)));
1868 3381
1869 invoke_av = (AV *)SvRV (invoke); 3382 if ((SV *)hv == &PL_sv_undef)
1870 len = av_len (invoke_av);
1871
1872 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1873
1874 if (len > 0)
1875 { 3383 {
1876 av_fill (defav, len - 1); 3384 PUSHMARK (SP);
1877 for (i = 0; i < len; ++i) 3385 EXTEND (SP, 2);
1878 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1])); 3386 PUSHs (sv_Coro);
3387 PUSHs ((SV *)cv_pool_handler);
3388 PUTBACK;
3389 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3390 SPAGAIN;
3391
3392 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
1879 } 3393 }
1880 3394
3395 {
3396 struct coro *coro = SvSTATE_hv (hv);
3397
3398 assert (!coro->invoke_cb);
3399 assert (!coro->invoke_av);
3400 coro->invoke_cb = SvREFCNT_inc (cb);
3401 coro->invoke_av = av;
3402 }
3403
3404 api_ready (aTHX_ (SV *)hv);
3405
3406 if (GIMME_V != G_VOID)
3407 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3408 else
1881 SvREFCNT_dec (invoke); 3409 SvREFCNT_dec (hv);
1882} 3410}
1883 3411
1884void 3412SV *
1885_pool_2 (SV *cb) 3413rouse_cb ()
3414 PROTOTYPE:
1886 CODE: 3415 CODE:
1887{ 3416 RETVAL = coro_new_rouse_cb (aTHX);
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: 3417 OUTPUT:
1931 RETVAL 3418 RETVAL
1932 3419
1933void 3420void
1934_set_state (char *data_) 3421rouse_wait (...)
3422 PROTOTYPE: ;$
3423 PPCODE:
3424 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3425
3426void
3427on_enter (SV *block)
3428 ALIAS:
3429 on_leave = 1
1935 PROTOTYPE: $ 3430 PROTOTYPE: &
1936 CODE: 3431 CODE:
1937{ 3432{
1938 struct io_state *data = (void *)data_; 3433 struct coro *coro = SvSTATE_current;
3434 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
1939 3435
1940 errno = data->errorno; 3436 block = (SV *)coro_sv_2cv (aTHX_ block);
1941 PL_laststype = data->laststype;
1942 PL_laststatval = data->laststatval;
1943 PL_statcache = data->statcache;
1944}
1945 3437
3438 if (!*avp)
3439 *avp = newAV ();
3440
3441 av_push (*avp, SvREFCNT_inc (block));
3442
3443 if (!ix)
3444 on_enterleave_call (aTHX_ block);
3445
3446 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3447 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3448 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = PerlIO::cede
3453
3454BOOT:
3455 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3456
3457
3458MODULE = Coro::State PACKAGE = Coro::Semaphore
3459
3460SV *
3461new (SV *klass, SV *count = 0)
3462 CODE:
3463 RETVAL = sv_bless (
3464 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3465 GvSTASH (CvGV (cv))
3466 );
3467 OUTPUT:
3468 RETVAL
3469
3470# helper for Coro::Channel and others
3471SV *
3472_alloc (int count)
3473 CODE:
3474 RETVAL = coro_waitarray_new (aTHX_ count);
3475 OUTPUT:
3476 RETVAL
3477
3478SV *
3479count (SV *self)
3480 CODE:
3481 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3482 OUTPUT:
3483 RETVAL
3484
3485void
3486up (SV *self, int adjust = 1)
3487 ALIAS:
3488 adjust = 1
3489 CODE:
3490 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3491
3492void
3493down (...)
3494 CODE:
3495 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3496
3497void
3498wait (...)
3499 CODE:
3500 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3501
3502void
3503try (SV *self)
3504 PPCODE:
3505{
3506 AV *av = (AV *)SvRV (self);
3507 SV *count_sv = AvARRAY (av)[0];
3508 IV count = SvIVX (count_sv);
3509
3510 if (count > 0)
3511 {
3512 --count;
3513 SvIVX (count_sv) = count;
3514 XSRETURN_YES;
3515 }
3516 else
3517 XSRETURN_NO;
3518}
3519
3520void
3521waiters (SV *self)
3522 PPCODE:
3523{
3524 AV *av = (AV *)SvRV (self);
3525 int wcount = AvFILLp (av) + 1 - 1;
3526
3527 if (GIMME_V == G_SCALAR)
3528 XPUSHs (sv_2mortal (newSViv (wcount)));
3529 else
3530 {
3531 int i;
3532 EXTEND (SP, wcount);
3533 for (i = 1; i <= wcount; ++i)
3534 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3535 }
3536}
3537
3538MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3539
3540void
3541_may_delete (SV *sem, int count, int extra_refs)
3542 PPCODE:
3543{
3544 AV *av = (AV *)SvRV (sem);
3545
3546 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3547 && AvFILLp (av) == 0 /* no waiters, just count */
3548 && SvIV (AvARRAY (av)[0]) == count)
3549 XSRETURN_YES;
3550
3551 XSRETURN_NO;
3552}
3553
3554MODULE = Coro::State PACKAGE = Coro::Signal
3555
3556SV *
3557new (SV *klass)
3558 CODE:
3559 RETVAL = sv_bless (
3560 coro_waitarray_new (aTHX_ 0),
3561 GvSTASH (CvGV (cv))
3562 );
3563 OUTPUT:
3564 RETVAL
3565
3566void
3567wait (...)
3568 CODE:
3569 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3570
3571void
3572broadcast (SV *self)
3573 CODE:
3574{
3575 AV *av = (AV *)SvRV (self);
3576 coro_signal_wake (aTHX_ av, AvFILLp (av));
3577}
3578
3579void
3580send (SV *self)
3581 CODE:
3582{
3583 AV *av = (AV *)SvRV (self);
3584
3585 if (AvFILLp (av))
3586 coro_signal_wake (aTHX_ av, 1);
3587 else
3588 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3589}
3590
3591IV
3592awaited (SV *self)
3593 CODE:
3594 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3595 OUTPUT:
3596 RETVAL
3597
3598
3599MODULE = Coro::State PACKAGE = Coro::AnyEvent
3600
3601BOOT:
3602 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3603
3604void
3605_schedule (...)
3606 CODE:
3607{
3608 static int incede;
3609
3610 api_cede_notself (aTHX);
3611
3612 ++incede;
3613 while (coro_nready >= incede && api_cede (aTHX))
3614 ;
3615
3616 sv_setsv (sv_activity, &PL_sv_undef);
3617 if (coro_nready >= incede)
3618 {
3619 PUSHMARK (SP);
3620 PUTBACK;
3621 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3622 }
3623
3624 --incede;
3625}
3626
3627
3628MODULE = Coro::State PACKAGE = Coro::AIO
3629
3630void
3631_register (char *target, char *proto, SV *req)
3632 CODE:
3633{
3634 CV *req_cv = coro_sv_2cv (aTHX_ req);
3635 /* newXSproto doesn't return the CV on 5.8 */
3636 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3637 sv_setpv ((SV *)slf_cv, proto);
3638 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3639}
3640

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