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Comparing Coro/Coro/State.xs (file contents):
Revision 1.217 by root, Wed Nov 14 11:32:56 2007 UTC vs.
Revision 1.315 by root, Thu Nov 20 05:25:17 2008 UTC

… …
4#define PERL_EXT 4#define PERL_EXT
5 5
6#include "EXTERN.h" 6#include "EXTERN.h"
7#include "perl.h" 7#include "perl.h"
8#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
9 10
10#include "patchlevel.h" 11#include "patchlevel.h"
11 12
12#include <stdio.h> 13#include <stdio.h>
13#include <errno.h> 14#include <errno.h>
14#include <assert.h> 15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
15#include <inttypes.h> /* portable stdint.h */ 23# include <inttypes.h> /* most portable stdint.h */
24#endif
16 25
17#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
18# include <unistd.h> 27# include <unistd.h>
19# include <sys/mman.h> 28# include <sys/mman.h>
20# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
37# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
38#endif 47#endif
39 48
40#if CORO_USE_VALGRIND 49#if CORO_USE_VALGRIND
41# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
42# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
43#else
44# define REGISTER_STACK(cctx,start,end)
45#endif 51#endif
46 52
47/* the maximum number of idle cctx that will be pooled */ 53/* the maximum number of idle cctx that will be pooled */
48#define MAX_IDLE_CCTX 8 54static int cctx_max_idle = 4;
49 55
50#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
51 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
52 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
53 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
54 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
55 61
56#if !PERL_VERSION_ATLEAST (5,6,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
57# ifndef PL_ppaddr 63# ifndef PL_ppaddr
58# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
59# endif 65# endif
… …
72# ifndef IS_PADCONST 78# ifndef IS_PADCONST
73# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
74# endif 80# endif
75#endif 81#endif
76 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
77/* 5.8.7 */ 107/* 5.8.7 */
78#ifndef SvRV_set 108#ifndef SvRV_set
79# define SvRV_set(s,v) SvRV(s) = (v) 109# define SvRV_set(s,v) SvRV(s) = (v)
80#endif 110#endif
81 111
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 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
91# undef CORO_STACKGUARD 113# undef CORO_STACKGUARD
92#endif 114#endif
93 115
94#ifndef CORO_STACKGUARD 116#ifndef CORO_STACKGUARD
… …
100# define CORO_PREFER_PERL_FUNCTIONS 0 122# define CORO_PREFER_PERL_FUNCTIONS 0
101#endif 123#endif
102 124
103/* The next macros try to return the current stack pointer, in an as 125/* The next macros try to return the current stack pointer, in an as
104 * portable way as possible. */ 126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
105#define dSTACKLEVEL volatile char stacklevel 131# define dSTACKLEVEL volatile void *stacklevel
106#define STACKLEVEL ((void *)&stacklevel) 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
107 134
108#define IN_DESTRUCT (PL_main_cv == Nullcv) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
109 136
110#if __GNUC__ >= 3 137#if __GNUC__ >= 3
111# define attribute(x) __attribute__(x) 138# define attribute(x) __attribute__(x)
112# define BARRIER __asm__ __volatile__ ("" : : : "memory")
113# define expect(expr,value) __builtin_expect ((expr),(value)) 139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
114#else 141#else
115# define attribute(x) 142# define attribute(x)
116# define BARRIER
117# define expect(expr,value) (expr) 143# define expect(expr,value) (expr)
144# define INLINE static
118#endif 145#endif
119 146
120#define expect_false(expr) expect ((expr) != 0, 0) 147#define expect_false(expr) expect ((expr) != 0, 0)
121#define expect_true(expr) expect ((expr) != 0, 1) 148#define expect_true(expr) expect ((expr) != 0, 1)
122 149
123#define NOINLINE attribute ((noinline)) 150#define NOINLINE attribute ((noinline))
124 151
125#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
126 154
127#ifdef USE_ITHREADS 155#ifdef USE_ITHREADS
128static perl_mutex coro_mutex; 156# if CORO_PTHREAD
129# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 157static 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 158# endif
159#endif
135 160
136/* helper storage struct for Coro::AIO */ 161static 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};
144 162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
145static size_t coro_stacksize = CORO_STACKSIZE; 168static size_t cctx_stacksize = CORO_STACKSIZE;
146static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
147static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
148static JMPENV *main_top_env; 171static JMPENV *main_top_env;
149static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
150static volatile SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
151 174
152static GV *irsgv; /* $/ */ 175static GV *irsgv; /* $/ */
153static GV *stdoutgv; /* *STDOUT */ 176static GV *stdoutgv; /* *STDOUT */
154static SV *rv_diehook; 177static SV *rv_diehook;
155static SV *rv_warnhook; 178static SV *rv_warnhook;
156static HV *hv_sig; /* %SIG */ 179static HV *hv_sig; /* %SIG */
157 180
158/* async_pool helper stuff */ 181/* async_pool helper stuff */
159static SV *sv_pool_rss; 182static SV *sv_pool_rss;
160static SV *sv_pool_size; 183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
161static AV *av_async_pool; 185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_state_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
162 192
163static struct coro_cctx *cctx_first; 193static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle; 194static int cctx_count, cctx_idle;
165 195
166enum { 196enum {
… …
171 CC_TRACE_LINE = 0x10, /* trace each statement */ 201 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE, 202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173}; 203};
174 204
175/* this is a structure representing a c-level coroutine */ 205/* this is a structure representing a c-level coroutine */
176typedef struct coro_cctx { 206typedef struct coro_cctx
207{
177 struct coro_cctx *next; 208 struct coro_cctx *next;
178 209
179 /* the stack */ 210 /* the stack */
180 void *sptr; 211 void *sptr;
181 size_t ssize; 212 size_t ssize;
… …
184 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 215 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
185 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */ 216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
186 JMPENV *top_env; 217 JMPENV *top_env;
187 coro_context cctx; 218 coro_context cctx;
188 219
220 U32 gen;
189#if CORO_USE_VALGRIND 221#if CORO_USE_VALGRIND
190 int valgrind_id; 222 int valgrind_id;
191#endif 223#endif
192 unsigned char flags; 224 unsigned char flags;
193} coro_cctx; 225} coro_cctx;
… …
198 CF_NEW = 0x0004, /* has never been switched to */ 230 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */ 231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200}; 232};
201 233
202/* the structure where most of the perl state is stored, overlaid on the cxstack */ 234/* the structure where most of the perl state is stored, overlaid on the cxstack */
203typedef struct { 235typedef struct
236{
204 SV *defsv; 237 SV *defsv;
205 AV *defav; 238 AV *defav;
206 SV *errsv; 239 SV *errsv;
207 SV *irsgv; 240 SV *irsgv;
208#define VAR(name,type) type name; 241#define VAR(name,type) type name;
… …
212 245
213#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT)) 246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
214 247
215/* this is a structure representing a perl-level coroutine */ 248/* this is a structure representing a perl-level coroutine */
216struct coro { 249struct coro {
217 /* the c coroutine allocated to this perl coroutine, if any */ 250 /* the C coroutine allocated to this perl coroutine, if any */
218 coro_cctx *cctx; 251 coro_cctx *cctx;
219 252
220 /* process data */ 253 /* state data */
254 struct CoroSLF slf_frame; /* saved slf frame */
221 AV *mainstack; 255 AV *mainstack;
222 perl_slots *slot; /* basically the saved sp */ 256 perl_slots *slot; /* basically the saved sp */
223 257
258 CV *startcv; /* the CV to execute */
224 AV *args; /* data associated with this coroutine (initial args) */ 259 AV *args; /* data associated with this coroutine (initial args) */
225 int refcnt; /* coroutines are refcounted, yes */ 260 int refcnt; /* coroutines are refcounted, yes */
226 int flags; /* CF_ flags */ 261 int flags; /* CF_ flags */
227 HV *hv; /* the perl hash associated with this coro, if any */ 262 HV *hv; /* the perl hash associated with this coro, if any */
263 void (*on_destroy)(pTHX_ struct coro *coro);
228 264
229 /* statistics */ 265 /* statistics */
230 int usecount; /* number of transfers to this coro */ 266 int usecount; /* number of transfers to this coro */
231 267
232 /* coro process data */ 268 /* coro process data */
233 int prio; 269 int prio;
234 SV *throw; /* exception to be thrown */ 270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
235 272
236 /* async_pool */ 273 /* async_pool */
237 SV *saved_deffh; 274 SV *saved_deffh;
275 SV *invoke_cb;
276 AV *invoke_av;
238 277
239 /* linked list */ 278 /* linked list */
240 struct coro *next, *prev; 279 struct coro *next, *prev;
241}; 280};
242 281
243typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
244typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
245 289
246/** Coro ********************************************************************/ 290/** Coro ********************************************************************/
247 291
248#define PRIO_MAX 3 292#define PRIO_MAX 3
249#define PRIO_HIGH 1 293#define PRIO_HIGH 1
… …
252#define PRIO_IDLE -3 296#define PRIO_IDLE -3
253#define PRIO_MIN -4 297#define PRIO_MIN -4
254 298
255/* for Coro.pm */ 299/* for Coro.pm */
256static SV *coro_current; 300static SV *coro_current;
301static SV *coro_readyhook;
257static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
258static int coro_nready; 303static CV *cv_coro_run, *cv_coro_terminate;
259static struct coro *coro_first; 304static struct coro *coro_first;
305#define coro_nready coroapi.nready
260 306
261/** lowlevel stuff **********************************************************/ 307/** lowlevel stuff **********************************************************/
262 308
263static SV * 309static SV *
264coro_get_sv (pTHX_ const char *name, int create) 310coro_get_sv (pTHX_ const char *name, int create)
265{ 311{
266#if PERL_VERSION_ATLEAST (5,9,0) 312#if PERL_VERSION_ATLEAST (5,10,0)
267 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
268 get_sv (name, create); 314 get_sv (name, create);
269#endif 315#endif
270 return get_sv (name, create); 316 return get_sv (name, create);
271} 317}
272 318
273static AV * 319static AV *
274coro_get_av (pTHX_ const char *name, int create) 320coro_get_av (pTHX_ const char *name, int create)
275{ 321{
276#if PERL_VERSION_ATLEAST (5,9,0) 322#if PERL_VERSION_ATLEAST (5,10,0)
277 /* silence stupid and wrong 5.10 warning that I am unable to switch off */ 323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
278 get_av (name, create); 324 get_av (name, create);
279#endif 325#endif
280 return get_av (name, create); 326 return get_av (name, create);
281} 327}
282 328
283static HV * 329static HV *
284coro_get_hv (pTHX_ const char *name, int create) 330coro_get_hv (pTHX_ const char *name, int create)
285{ 331{
286#if PERL_VERSION_ATLEAST (5,9,0) 332#if PERL_VERSION_ATLEAST (5,10,0)
287 /* 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 */
288 get_hv (name, create); 334 get_hv (name, create);
289#endif 335#endif
290 return get_hv (name, create); 336 return get_hv (name, create);
291} 337}
292 338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
347
293static AV * 348static AV *
294coro_clone_padlist (pTHX_ CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
295{ 350{
296 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
297 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
298 353
299 newpadlist = newAV (); 354 newpadlist = newAV ();
300 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
301#if PERL_VERSION_ATLEAST (5,9,0) 356#if PERL_VERSION_ATLEAST (5,10,0)
302 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
303#else 358#else
304 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
305#endif 360#endif
306 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
307 --AvFILLp (padlist); 362 --AvFILLp (padlist);
308 363
309 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
310 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
311 366
312 return newpadlist; 367 return newpadlist;
313} 368}
314 369
… …
344 399
345 /* casting is fun. */ 400 /* casting is fun. */
346 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
347 free_padlist (aTHX_ padlist); 402 free_padlist (aTHX_ padlist);
348 403
404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
405
349 return 0; 406 return 0;
350} 407}
351 408
352#define CORO_MAGIC_type_cv PERL_MAGIC_ext 409#define CORO_MAGIC_type_cv 26
353#define CORO_MAGIC_type_state PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
354 411
355static MGVTBL coro_cv_vtbl = { 412static MGVTBL coro_cv_vtbl = {
356 0, 0, 0, 0, 413 0, 0, 0, 0,
357 coro_cv_free 414 coro_cv_free
358}; 415};
359 416
417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
419 ? SvMAGIC (sv) \
420 : mg_find (sv, type))
421
360#define CORO_MAGIC(sv,type) \ 422#define CORO_MAGIC(sv, type) \
361 SvMAGIC (sv) \ 423 (expect_true (SvMAGIC (sv)) \
362 ? SvMAGIC (sv)->mg_type == type \ 424 ? CORO_MAGIC_NN (sv, type) \
363 ? SvMAGIC (sv) \
364 : mg_find (sv, type) \
365 : 0 425 : 0)
366 426
367#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv) 427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
368#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state) 428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
369 429
370static struct coro * 430INLINE struct coro *
371SvSTATE_ (pTHX_ SV *coro) 431SvSTATE_ (pTHX_ SV *coro)
372{ 432{
373 HV *stash; 433 HV *stash;
374 MAGIC *mg; 434 MAGIC *mg;
375 435
… …
390 mg = CORO_MAGIC_state (coro); 450 mg = CORO_MAGIC_state (coro);
391 return (struct coro *)mg->mg_ptr; 451 return (struct coro *)mg->mg_ptr;
392} 452}
393 453
394#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv)) 454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
395 459
396/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
397static void 461static void
398get_padlist (pTHX_ CV *cv) 462get_padlist (pTHX_ CV *cv)
399{ 463{
… …
403 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
404 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
405 else 469 else
406 { 470 {
407#if CORO_PREFER_PERL_FUNCTIONS 471#if CORO_PREFER_PERL_FUNCTIONS
408 /* this is probably cleaner, but also slower? */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
409 CV *cp = Perl_cv_clone (cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
410 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
411 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
412 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
413#else 478#else
414 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 479 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
465 CvPADLIST (cv) = (AV *)POPs; 530 CvPADLIST (cv) = (AV *)POPs;
466 } 531 }
467 532
468 PUTBACK; 533 PUTBACK;
469 } 534 }
535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
470} 538}
471 539
472static void 540static void
473save_perl (pTHX_ Coro__State c) 541save_perl (pTHX_ Coro__State c)
474{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
475 { 546 {
476 dSP; 547 dSP;
477 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
478 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
479 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
497 568
498 if (expect_true (CvDEPTH (cv))) 569 if (expect_true (CvDEPTH (cv)))
499 { 570 {
500 EXTEND (SP, 3); 571 EXTEND (SP, 3);
501 PUSHs ((SV *)CvPADLIST (cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
502 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
503 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
504 575
505 CvDEPTH (cv) = 0; 576 CvDEPTH (cv) = 0;
506 get_padlist (aTHX_ cv); 577 get_padlist (aTHX_ cv);
507 } 578 }
… …
546 #undef VAR 617 #undef VAR
547 } 618 }
548} 619}
549 620
550/* 621/*
551 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
552 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
553 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
554 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
555 */ 626 */
556#if CORO_PREFER_PERL_FUNCTIONS 627#if CORO_PREFER_PERL_FUNCTIONS
557# define coro_init_stacks init_stacks 628# define coro_init_stacks(thx) init_stacks ()
558#else 629#else
559static void 630static void
560coro_init_stacks (pTHX) 631coro_init_stacks (pTHX)
561{ 632{
562 PL_curstackinfo = new_stackinfo(32, 8); 633 PL_curstackinfo = new_stackinfo(32, 8);
… …
587 658
588 New(54,PL_savestack,24,ANY); 659 New(54,PL_savestack,24,ANY);
589 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
590 PL_savestack_max = 24; 661 PL_savestack_max = 24;
591 662
592#if !PERL_VERSION_ATLEAST (5,9,0) 663#if !PERL_VERSION_ATLEAST (5,10,0)
593 New(54,PL_retstack,4,OP*); 664 New(54,PL_retstack,4,OP*);
594 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
595 PL_retstack_max = 4; 666 PL_retstack_max = 4;
596#endif 667#endif
597} 668}
… …
599 670
600/* 671/*
601 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
602 */ 673 */
603static void 674static void
604coro_destroy_stacks (pTHX) 675coro_destruct_stacks (pTHX)
605{ 676{
606 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
607 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
608 679
609 while (PL_curstackinfo) 680 while (PL_curstackinfo)
… …
620 691
621 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
622 Safefree (PL_markstack); 693 Safefree (PL_markstack);
623 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
624 Safefree (PL_savestack); 695 Safefree (PL_savestack);
625#if !PERL_VERSION_ATLEAST (5,9,0) 696#if !PERL_VERSION_ATLEAST (5,10,0)
626 Safefree (PL_retstack); 697 Safefree (PL_retstack);
627#endif 698#endif
628} 699}
700
701#define CORO_RSS \
702 rss += sizeof (SYM (curstackinfo)); \
703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
629 709
630static size_t 710static size_t
631coro_rss (pTHX_ struct coro *coro) 711coro_rss (pTHX_ struct coro *coro)
632{ 712{
633 size_t rss = sizeof (*coro); 713 size_t rss = sizeof (*coro);
634 714
635 if (coro->mainstack) 715 if (coro->mainstack)
636 { 716 {
637 perl_slots tmp_slot;
638 perl_slots *slot;
639
640 if (coro->flags & CF_RUNNING) 717 if (coro->flags & CF_RUNNING)
641 { 718 {
642 slot = &tmp_slot; 719 #define SYM(sym) PL_ ## sym
643 720 CORO_RSS;
644 #define VAR(name,type) slot->name = PL_ ## name;
645 # include "state.h"
646 #undef VAR 721 #undef SYM
647 } 722 }
648 else 723 else
649 slot = coro->slot; 724 {
650 725 #define SYM(sym) coro->slot->sym
651 rss += sizeof (slot->curstackinfo); 726 CORO_RSS;
652 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT); 727 #undef SYM
653 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *); 728 }
654 rss += slot->tmps_max * sizeof (SV *);
655 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
656 rss += slot->scopestack_max * sizeof (I32);
657 rss += slot->savestack_max * sizeof (ANY);
658
659#if !PERL_VERSION_ATLEAST (5,9,0)
660 rss += slot->retstack_max * sizeof (OP *);
661#endif
662 } 729 }
663 730
664 return rss; 731 return rss;
665} 732}
666 733
667/** coroutine stack handling ************************************************/ 734/** coroutine stack handling ************************************************/
668 735
669#if 0
670static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg); 736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
671 746
672/* 747/*
673 * This overrides the default magic get method of %SIG elements. 748 * This overrides the default magic get method of %SIG elements.
674 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook 749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
675 * and instead of tryign to save and restore the hash elements, we just provide 750 * and instead of tryign to save and restore the hash elements, we just provide
… …
679 * when a schedule happens then, but we ignore this. 754 * when a schedule happens then, but we ignore this.
680 */ 755 */
681static int 756static int
682coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg) 757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
683{ 758{
684 return orig_sigelem_get (aTHX_ sv, mg);
685 const char *s = MgPV_nolen_const (mg); 759 const char *s = MgPV_nolen_const (mg);
686 760
687 if (*s == '_') 761 if (*s == '_')
688 { 762 {
689 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0; 763 SV **svp = 0;
690 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0; 764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
769 {
770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
771 return 0;
772 }
773 }
774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
691 } 784 {
785 SV **svp = 0;
692 786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
693 return orig_sigelem_get (aTHX_ sv, mg); 823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
694} 824}
695#endif
696 825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
697static void 833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
698coro_setup (pTHX_ struct coro *coro) 842coro_setup (pTHX_ struct coro *coro)
699{ 843{
700 /* 844 /*
701 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
702 */ 846 */
… …
709 PL_curpm = 0; 853 PL_curpm = 0;
710 PL_curpad = 0; 854 PL_curpad = 0;
711 PL_localizing = 0; 855 PL_localizing = 0;
712 PL_dirty = 0; 856 PL_dirty = 0;
713 PL_restartop = 0; 857 PL_restartop = 0;
858#if PERL_VERSION_ATLEAST (5,10,0)
859 PL_parser = 0;
860#endif
714 861
715 /* recreate the die/warn hooks */ 862 /* recreate the die/warn hooks */
716 PL_diehook = 0; 863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
717 hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0); 864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
718 PL_diehook = SvREFCNT_inc (rv_diehook);
719
720 PL_warnhook = 0;
721 hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
722 PL_warnhook = SvREFCNT_inc (rv_warnhook);
723 865
724 GvSV (PL_defgv) = newSV (0); 866 GvSV (PL_defgv) = newSV (0);
725 GvAV (PL_defgv) = coro->args; coro->args = 0; 867 GvAV (PL_defgv) = coro->args; coro->args = 0;
726 GvSV (PL_errgv) = newSV (0); 868 GvSV (PL_errgv) = newSV (0);
727 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0); 869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
728 PL_rs = newSVsv (GvSV (irsgv)); 870 PL_rs = newSVsv (GvSV (irsgv));
729 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv); 871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
730 872
731 { 873 {
732 dSP; 874 dSP;
733 LOGOP myop; 875 UNOP myop;
734 876
735 Zero (&myop, 1, LOGOP); 877 Zero (&myop, 1, UNOP);
736 myop.op_next = Nullop; 878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
737 myop.op_flags = OPf_WANT_VOID; 880 myop.op_flags = OPf_WANT_VOID;
738 881
739 PUSHMARK (SP); 882 PUSHMARK (SP);
740 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv)))); 883 PUSHs ((SV *)coro->startcv);
741 PUTBACK; 884 PUTBACK;
742 PL_op = (OP *)&myop; 885 PL_op = (OP *)&myop;
743 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
744 SPAGAIN;
745 } 887 }
746 888
747 /* this newly created coroutine might be run on an existing cctx which most 889 /* this newly created coroutine might be run on an existing cctx which most
748 * likely was suspended in set_stacklevel, called from entersub. 890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
749 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
750 * so we ENTER here for symmetry
751 */ 891 */
752 ENTER; 892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
753} 893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
754 894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
755static void 907static void
756coro_destroy (pTHX_ struct coro *coro) 908coro_destruct (pTHX_ struct coro *coro)
757{ 909{
758 if (!IN_DESTRUCT) 910 if (!IN_DESTRUCT)
759 { 911 {
760 /* restore all saved variables and stuff */ 912 /* restore all saved variables and stuff */
761 LEAVE_SCOPE (0); 913 LEAVE_SCOPE (0);
… …
781 933
782 SvREFCNT_dec (PL_diehook); 934 SvREFCNT_dec (PL_diehook);
783 SvREFCNT_dec (PL_warnhook); 935 SvREFCNT_dec (PL_warnhook);
784 936
785 SvREFCNT_dec (coro->saved_deffh); 937 SvREFCNT_dec (coro->saved_deffh);
786 SvREFCNT_dec (coro->throw); 938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
787 941
788 coro_destroy_stacks (aTHX); 942 coro_destruct_stacks (aTHX);
789} 943}
790 944
791static void 945INLINE void
792free_coro_mortal (pTHX) 946free_coro_mortal (pTHX)
793{ 947{
794 if (expect_true (coro_mortal)) 948 if (expect_true (coro_mortal))
795 { 949 {
796 SvREFCNT_dec (coro_mortal); 950 SvREFCNT_dec (coro_mortal);
… …
801static int 955static int
802runops_trace (pTHX) 956runops_trace (pTHX)
803{ 957{
804 COP *oldcop = 0; 958 COP *oldcop = 0;
805 int oldcxix = -2; 959 int oldcxix = -2;
806 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */ 960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
807 coro_cctx *cctx = coro->cctx; 961 coro_cctx *cctx = coro->cctx;
808 962
809 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX))) 963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
810 { 964 {
811 PERL_ASYNC_CHECK (); 965 PERL_ASYNC_CHECK ();
… …
830 : cx->blk_gimme == G_SCALAR ? bot + 1 984 : cx->blk_gimme == G_SCALAR ? bot + 1
831 : bot; 985 : bot;
832 986
833 av_extend (av, top - bot); 987 av_extend (av, top - bot);
834 while (bot < top) 988 while (bot < top)
835 av_push (av, SvREFCNT_inc (*bot++)); 989 av_push (av, SvREFCNT_inc_NN (*bot++));
836 990
837 PL_runops = RUNOPS_DEFAULT; 991 PL_runops = RUNOPS_DEFAULT;
838 ENTER; 992 ENTER;
839 SAVETMPS; 993 SAVETMPS;
840 EXTEND (SP, 3); 994 EXTEND (SP, 3);
… …
878 SAVETMPS; 1032 SAVETMPS;
879 EXTEND (SP, 3); 1033 EXTEND (SP, 3);
880 PUSHMARK (SP); 1034 PUSHMARK (SP);
881 PUSHs (&PL_sv_yes); 1035 PUSHs (&PL_sv_yes);
882 PUSHs (fullname); 1036 PUSHs (fullname);
883 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef); 1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
884 PUTBACK; 1038 PUTBACK;
885 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0); 1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
886 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD); 1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
887 SPAGAIN; 1041 SPAGAIN;
888 FREETMPS; 1042 FREETMPS;
… …
920 1074
921 TAINT_NOT; 1075 TAINT_NOT;
922 return 0; 1076 return 0;
923} 1077}
924 1078
925/* inject a fake call to Coro::State::_cctx_init into the execution */ 1079static struct coro_cctx *cctx_ssl_cctx;
926/* _cctx_init should be careful, as it could be called at almost any time */ 1080static struct CoroSLF cctx_ssl_frame;
927/* during execution of a perl program */ 1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
928static void NOINLINE 1098static void NOINLINE
929cctx_prepare (pTHX_ coro_cctx *cctx) 1099cctx_prepare (pTHX_ coro_cctx *cctx)
930{ 1100{
931 dSP;
932 LOGOP myop;
933
934 PL_top_env = &PL_start_env; 1101 PL_top_env = &PL_start_env;
935 1102
936 if (cctx->flags & CC_TRACE) 1103 if (cctx->flags & CC_TRACE)
937 PL_runops = runops_trace; 1104 PL_runops = runops_trace;
938 1105
939 Zero (&myop, 1, LOGOP); 1106 /* we already must be executing an SLF op, there is no other valid way
940 myop.op_next = PL_op; 1107 * that can lead to creation of a new cctx */
941 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
942 1110
943 PUSHMARK (SP); 1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
944 EXTEND (SP, 2); 1112 cctx_ssl_cctx = cctx;
945 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx)))); 1113 cctx_ssl_frame = slf_frame;
946 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1114
947 PUTBACK; 1115 slf_frame.prepare = slf_prepare_set_stacklevel;
948 PL_op = (OP *)&myop; 1116 slf_frame.check = slf_check_set_stacklevel;
949 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1117}
950 SPAGAIN; 1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
951} 1124}
952 1125
953/* 1126/*
954 * this is a _very_ stripped down perl interpreter ;) 1127 * this is a _very_ stripped down perl interpreter ;)
955 */ 1128 */
956static void 1129static void
957cctx_run (void *arg) 1130cctx_run (void *arg)
958{ 1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
959 dTHX; 1138 dTHX;
960 1139
961 /* cctx_run is the alternative tail of transfer(), so unlock here. */ 1140 /* normally we would need to skip the entersub here */
962 UNLOCK; 1141 /* not doing so will re-execute it, which is exactly what we want */
963
964 /* we now skip the entersub that lead to transfer() */
965 PL_op = PL_op->op_next; 1142 /* PL_nop = PL_nop->op_next */
966 1143
967 /* inject a fake subroutine call to cctx_init */ 1144 /* inject a fake subroutine call to cctx_init */
968 cctx_prepare (aTHX_ (coro_cctx *)arg); 1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
969 1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
970 /* somebody or something will hit me for both perl_run and PL_restartop */ 1150 /* somebody or something will hit me for both perl_run and PL_restartop */
971 PL_restartop = PL_op; 1151 PL_restartop = PL_op;
972 perl_run (PL_curinterp); 1152 perl_run (PL_curinterp);
973
974 /* 1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
1157
1158 /*
975 * If perl-run returns we assume exit() was being called or the coro 1159 * If perl-run returns we assume exit() was being called or the coro
976 * fell off the end, which seems to be the only valid (non-bug) 1160 * fell off the end, which seems to be the only valid (non-bug)
977 * reason for perl_run to return. We try to exit by jumping to the 1161 * reason for perl_run to return. We try to exit by jumping to the
978 * bootstrap-time "top" top_env, as we cannot restore the "main" 1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
979 * coroutine as Coro has no such concept 1163 * coroutine as Coro has no such concept
980 */ 1164 */
981 PL_top_env = main_top_env; 1165 PL_top_env = main_top_env;
982 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */ 1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
983} 1168}
984 1169
985static coro_cctx * 1170static coro_cctx *
986cctx_new () 1171cctx_new ()
987{ 1172{
988 coro_cctx *cctx; 1173 coro_cctx *cctx;
1174
1175 ++cctx_count;
1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
989 void *stack_start; 1202 void *stack_start;
990 size_t stack_size; 1203 size_t stack_size;
991 1204
992 ++cctx_count;
993
994 Newz (0, cctx, 1, coro_cctx);
995
996#if HAVE_MMAP 1205#if HAVE_MMAP
997 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE; 1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
998 /* mmap supposedly does allocate-on-write for us */ 1207 /* mmap supposedly does allocate-on-write for us */
999 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1000 1209
1001 if (cctx->sptr != (void *)-1) 1210 if (cctx->sptr != (void *)-1)
1002 { 1211 {
1003# if CORO_STACKGUARD 1212 #if CORO_STACKGUARD
1004 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE); 1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1005# endif 1214 #endif
1006 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr; 1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1007 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE; 1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1008 cctx->flags |= CC_MAPPED; 1217 cctx->flags |= CC_MAPPED;
1009 } 1218 }
1010 else 1219 else
1011#endif 1220#endif
1012 { 1221 {
1013 cctx->ssize = coro_stacksize * (long)sizeof (long); 1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1014 New (0, cctx->sptr, coro_stacksize, long); 1223 New (0, cctx->sptr, cctx_stacksize, long);
1015 1224
1016 if (!cctx->sptr) 1225 if (!cctx->sptr)
1017 { 1226 {
1018 perror ("FATAL: unable to allocate stack for coroutine"); 1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1019 _exit (EXIT_FAILURE); 1228 _exit (EXIT_FAILURE);
1020 } 1229 }
1021 1230
1022 stack_start = cctx->sptr; 1231 stack_start = cctx->sptr;
1023 stack_size = cctx->ssize; 1232 stack_size = cctx->ssize;
1024 } 1233 }
1025 1234
1026 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size); 1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1237 #endif
1238
1027 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size); 1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1028 1240
1029 return cctx; 1241 return cctx;
1030} 1242}
1031 1243
… …
1034{ 1246{
1035 if (!cctx) 1247 if (!cctx)
1036 return; 1248 return;
1037 1249
1038 --cctx_count; 1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
1039 1252
1253 /* coro_transfer creates new, empty cctx's */
1254 if (cctx->sptr)
1255 {
1040#if CORO_USE_VALGRIND 1256 #if CORO_USE_VALGRIND
1041 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1042#endif 1258 #endif
1043 1259
1044#if HAVE_MMAP 1260#if HAVE_MMAP
1045 if (cctx->flags & CC_MAPPED) 1261 if (cctx->flags & CC_MAPPED)
1046 munmap (cctx->sptr, cctx->ssize); 1262 munmap (cctx->sptr, cctx->ssize);
1047 else 1263 else
1048#endif 1264#endif
1049 Safefree (cctx->sptr); 1265 Safefree (cctx->sptr);
1266 }
1050 1267
1051 Safefree (cctx); 1268 Safefree (cctx);
1052} 1269}
1053 1270
1054/* wether this cctx should be destructed */ 1271/* wether this cctx should be destructed */
1055#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE)) 1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1056 1273
1057static coro_cctx * 1274static coro_cctx *
1058cctx_get (pTHX) 1275cctx_get (pTHX)
1059{ 1276{
1060 while (expect_true (cctx_first)) 1277 while (expect_true (cctx_first))
… …
1067 return cctx; 1284 return cctx;
1068 1285
1069 cctx_destroy (cctx); 1286 cctx_destroy (cctx);
1070 } 1287 }
1071 1288
1072 return cctx_new (); 1289 return cctx_new_run ();
1073} 1290}
1074 1291
1075static void 1292static void
1076cctx_put (coro_cctx *cctx) 1293cctx_put (coro_cctx *cctx)
1077{ 1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
1078 /* free another cctx if overlimit */ 1297 /* free another cctx if overlimit */
1079 if (expect_false (cctx_idle >= MAX_IDLE_CCTX)) 1298 if (expect_false (cctx_idle >= cctx_max_idle))
1080 { 1299 {
1081 coro_cctx *first = cctx_first; 1300 coro_cctx *first = cctx_first;
1082 cctx_first = first->next; 1301 cctx_first = first->next;
1083 --cctx_idle; 1302 --cctx_idle;
1084 1303
… …
1093/** coroutine switching *****************************************************/ 1312/** coroutine switching *****************************************************/
1094 1313
1095static void 1314static void
1096transfer_check (pTHX_ struct coro *prev, struct coro *next) 1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1097{ 1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1098 if (expect_true (prev != next)) 1319 if (expect_true (prev != next))
1099 { 1320 {
1100 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW)))) 1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1101 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states"); 1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1102 1323
1103 if (expect_false (next->flags & CF_RUNNING)) 1324 if (expect_false (next->flags & CF_RUNNING))
1104 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states"); 1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1105 1326
1106 if (expect_false (next->flags & CF_DESTROYED)) 1327 if (expect_false (next->flags & CF_DESTROYED))
1107 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states"); 1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1108 1329
1109 if (
1110#if PERL_VERSION_ATLEAST (5,9,0) 1330#if !PERL_VERSION_ATLEAST (5,10,0)
1111 expect_false (PL_parser)
1112#else
1113 expect_false (PL_lex_state != LEX_NOTPARSING) 1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1114#endif
1115 )
1116 croak ("Coro::State::transfer called while parsing, but this is not supported"); 1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1117 } 1334 }
1118} 1335}
1119 1336
1120/* always use the TRANSFER macro */ 1337/* always use the TRANSFER macro */
1121static void NOINLINE 1338static void NOINLINE /* noinline so we have a fixed stackframe */
1122transfer (pTHX_ struct coro *prev, struct coro *next) 1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1123{ 1340{
1124 dSTACKLEVEL; 1341 dSTACKLEVEL;
1125 static volatile int has_throw;
1126 1342
1127 /* sometimes transfer is only called to set idle_sp */ 1343 /* sometimes transfer is only called to set idle_sp */
1128 if (expect_false (!next)) 1344 if (expect_false (!next))
1129 { 1345 {
1130 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1346 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
… …
1134 { 1350 {
1135 coro_cctx *prev__cctx; 1351 coro_cctx *prev__cctx;
1136 1352
1137 if (expect_false (prev->flags & CF_NEW)) 1353 if (expect_false (prev->flags & CF_NEW))
1138 { 1354 {
1139 /* create a new empty context */ 1355 /* create a new empty/source context */
1140 Newz (0, prev->cctx, 1, coro_cctx); 1356 prev->cctx = cctx_new_empty ();
1141 prev->flags &= ~CF_NEW; 1357 prev->flags &= ~CF_NEW;
1142 prev->flags |= CF_RUNNING; 1358 prev->flags |= CF_RUNNING;
1143 } 1359 }
1144 1360
1145 prev->flags &= ~CF_RUNNING; 1361 prev->flags &= ~CF_RUNNING;
1146 next->flags |= CF_RUNNING; 1362 next->flags |= CF_RUNNING;
1147
1148 LOCK;
1149 1363
1150 /* first get rid of the old state */ 1364 /* first get rid of the old state */
1151 save_perl (aTHX_ prev); 1365 save_perl (aTHX_ prev);
1152 1366
1153 if (expect_false (next->flags & CF_NEW)) 1367 if (expect_false (next->flags & CF_NEW))
… …
1160 else 1374 else
1161 load_perl (aTHX_ next); 1375 load_perl (aTHX_ next);
1162 1376
1163 prev__cctx = prev->cctx; 1377 prev__cctx = prev->cctx;
1164 1378
1165 /* possibly "free" the cctx */ 1379 /* possibly untie and reuse the cctx */
1166 if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))) 1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
1167 { 1385 {
1168 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1169 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te)); 1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1170 1388
1171 prev->cctx = 0; 1389 prev->cctx = 0;
1172 1390
1173 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */ 1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1174 /* without this the next cctx_get might destroy the prev__cctx while still in use */ 1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
… …
1181 1399
1182 ++next->usecount; 1400 ++next->usecount;
1183 1401
1184 if (expect_true (!next->cctx)) 1402 if (expect_true (!next->cctx))
1185 next->cctx = cctx_get (aTHX); 1403 next->cctx = cctx_get (aTHX);
1186
1187 has_throw = !!next->throw;
1188 1404
1189 if (expect_false (prev__cctx != next->cctx)) 1405 if (expect_false (prev__cctx != next->cctx))
1190 { 1406 {
1191 prev__cctx->top_env = PL_top_env; 1407 prev__cctx->top_env = PL_top_env;
1192 PL_top_env = next->cctx->top_env; 1408 PL_top_env = next->cctx->top_env;
1193 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1194 } 1410 }
1195 1411
1196 free_coro_mortal (aTHX); 1412 transfer_tail (aTHX);
1197 UNLOCK;
1198
1199 if (expect_false (has_throw))
1200 {
1201 struct coro *coro = SvSTATE (coro_current);
1202
1203 if (coro->throw)
1204 {
1205 SV *exception = coro->throw;
1206 coro->throw = 0;
1207 sv_setsv (ERRSV, exception);
1208 croak (0);
1209 }
1210 }
1211 } 1413 }
1212} 1414}
1213 1415
1214struct transfer_args
1215{
1216 struct coro *prev, *next;
1217};
1218
1219#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next) 1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1220#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next) 1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1221 1418
1222/** high level stuff ********************************************************/ 1419/** high level stuff ********************************************************/
1223 1420
1224static int 1421static int
1225coro_state_destroy (pTHX_ struct coro *coro) 1422coro_state_destroy (pTHX_ struct coro *coro)
1226{ 1423{
1227 if (coro->flags & CF_DESTROYED) 1424 if (coro->flags & CF_DESTROYED)
1228 return 0; 1425 return 0;
1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1229 1429
1230 coro->flags |= CF_DESTROYED; 1430 coro->flags |= CF_DESTROYED;
1231 1431
1232 if (coro->flags & CF_READY) 1432 if (coro->flags & CF_READY)
1233 { 1433 {
1234 /* reduce nready, as destroying a ready coro effectively unreadies it */ 1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1235 /* alternative: look through all ready queues and remove the coro */ 1435 /* alternative: look through all ready queues and remove the coro */
1236 LOCK;
1237 --coro_nready; 1436 --coro_nready;
1238 UNLOCK;
1239 } 1437 }
1240 else 1438 else
1241 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */ 1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1242 1440
1243 if (coro->mainstack && coro->mainstack != main_mainstack) 1441 if (coro->mainstack && coro->mainstack != main_mainstack)
1244 { 1442 {
1245 struct coro temp; 1443 struct coro temp;
1246 1444
1247 if (coro->flags & CF_RUNNING) 1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1248 croak ("FATAL: tried to destroy currently running coroutine");
1249 1446
1250 save_perl (aTHX_ &temp); 1447 save_perl (aTHX_ &temp);
1251 load_perl (aTHX_ coro); 1448 load_perl (aTHX_ coro);
1252 1449
1253 coro_destroy (aTHX_ coro); 1450 coro_destruct (aTHX_ coro);
1254 1451
1255 load_perl (aTHX_ &temp); 1452 load_perl (aTHX_ &temp);
1256 1453
1257 coro->slot = 0; 1454 coro->slot = 0;
1258 } 1455 }
1259 1456
1260 cctx_destroy (coro->cctx); 1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
1261 SvREFCNT_dec (coro->args); 1459 SvREFCNT_dec (coro->args);
1460 SvREFCNT_dec (CORO_THROW);
1262 1461
1263 if (coro->next) coro->next->prev = coro->prev; 1462 if (coro->next) coro->next->prev = coro->prev;
1264 if (coro->prev) coro->prev->next = coro->next; 1463 if (coro->prev) coro->prev->next = coro->next;
1265 if (coro == coro_first) coro_first = coro->next; 1464 if (coro == coro_first) coro_first = coro->next;
1266 1465
… …
1304# define MGf_DUP 0 1503# define MGf_DUP 0
1305#endif 1504#endif
1306}; 1505};
1307 1506
1308static void 1507static void
1309prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv) 1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1310{ 1509{
1311 ta->prev = SvSTATE (prev_sv); 1510 ta->prev = SvSTATE (prev_sv);
1312 ta->next = SvSTATE (next_sv); 1511 ta->next = SvSTATE (next_sv);
1313 TRANSFER_CHECK (*ta); 1512 TRANSFER_CHECK (*ta);
1314} 1513}
1315 1514
1316static void 1515static void
1317api_transfer (SV *prev_sv, SV *next_sv) 1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1318{ 1517{
1319 dTHX;
1320 struct transfer_args ta; 1518 struct coro_transfer_args ta;
1321 1519
1322 prepare_transfer (aTHX_ &ta, prev_sv, next_sv); 1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1323 TRANSFER (ta); 1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1324} 1545}
1325 1546
1326/** Coro ********************************************************************/ 1547/** Coro ********************************************************************/
1327 1548
1328static void 1549INLINE void
1329coro_enq (pTHX_ SV *coro_sv) 1550coro_enq (pTHX_ struct coro *coro)
1330{ 1551{
1331 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1332} 1553}
1333 1554
1334static SV * 1555INLINE SV *
1335coro_deq (pTHX_ int min_prio) 1556coro_deq (pTHX)
1336{ 1557{
1337 int prio = PRIO_MAX - PRIO_MIN; 1558 int prio;
1338 1559
1339 min_prio -= PRIO_MIN;
1340 if (min_prio < 0)
1341 min_prio = 0;
1342
1343 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1344 if (AvFILLp (coro_ready [prio]) >= 0) 1561 if (AvFILLp (coro_ready [prio]) >= 0)
1345 return av_shift (coro_ready [prio]); 1562 return av_shift (coro_ready [prio]);
1346 1563
1347 return 0; 1564 return 0;
1348} 1565}
1349 1566
1350static int 1567static int
1351api_ready (SV *coro_sv) 1568api_ready (pTHX_ SV *coro_sv)
1352{ 1569{
1353 dTHX;
1354 struct coro *coro; 1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
1355 1573
1356 if (SvROK (coro_sv)) 1574 if (SvROK (coro_sv))
1357 coro_sv = SvRV (coro_sv); 1575 coro_sv = SvRV (coro_sv);
1358 1576
1359 coro = SvSTATE (coro_sv); 1577 coro = SvSTATE (coro_sv);
… …
1361 if (coro->flags & CF_READY) 1579 if (coro->flags & CF_READY)
1362 return 0; 1580 return 0;
1363 1581
1364 coro->flags |= CF_READY; 1582 coro->flags |= CF_READY;
1365 1583
1366 LOCK; 1584 sv_hook = coro_nready ? 0 : coro_readyhook;
1367 coro_enq (aTHX_ SvREFCNT_inc (coro_sv)); 1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1586
1587 coro_enq (aTHX_ coro);
1368 ++coro_nready; 1588 ++coro_nready;
1369 UNLOCK; 1589
1590 if (sv_hook)
1591 {
1592 dSP;
1593
1594 ENTER;
1595 SAVETMPS;
1596
1597 PUSHMARK (SP);
1598 PUTBACK;
1599 call_sv (sv_hook, G_VOID | G_DISCARD);
1600
1601 FREETMPS;
1602 LEAVE;
1603 }
1604
1605 if (xs_hook)
1606 xs_hook ();
1370 1607
1371 return 1; 1608 return 1;
1372} 1609}
1373 1610
1374static int 1611static int
1375api_is_ready (SV *coro_sv) 1612api_is_ready (pTHX_ SV *coro_sv)
1376{ 1613{
1377 dTHX;
1378 return !!(SvSTATE (coro_sv)->flags & CF_READY); 1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1379} 1615}
1380 1616
1381static void 1617INLINE void
1382prepare_schedule (pTHX_ struct transfer_args *ta) 1618prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1383{ 1619{
1384 SV *prev_sv, *next_sv; 1620 SV *prev_sv, *next_sv;
1385 1621
1386 for (;;) 1622 for (;;)
1387 { 1623 {
1388 LOCK;
1389 next_sv = coro_deq (aTHX_ PRIO_MIN); 1624 next_sv = coro_deq (aTHX);
1390 1625
1391 /* nothing to schedule: call the idle handler */ 1626 /* nothing to schedule: call the idle handler */
1392 if (expect_false (!next_sv)) 1627 if (expect_false (!next_sv))
1393 { 1628 {
1394 dSP; 1629 dSP;
1395 UNLOCK;
1396 1630
1397 ENTER; 1631 ENTER;
1398 SAVETMPS; 1632 SAVETMPS;
1399 1633
1400 PUSHMARK (SP); 1634 PUSHMARK (SP);
1401 PUTBACK; 1635 PUTBACK;
1402 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD); 1636 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1403 1637
1404 FREETMPS; 1638 FREETMPS;
1405 LEAVE; 1639 LEAVE;
1406 continue; 1640 continue;
1407 } 1641 }
1408 1642
1409 ta->next = SvSTATE (next_sv); 1643 ta->next = SvSTATE_hv (next_sv);
1410 1644
1411 /* cannot transfer to destroyed coros, skip and look for next */ 1645 /* cannot transfer to destroyed coros, skip and look for next */
1412 if (expect_false (ta->next->flags & CF_DESTROYED)) 1646 if (expect_false (ta->next->flags & CF_DESTROYED))
1413 { 1647 {
1414 UNLOCK;
1415 SvREFCNT_dec (next_sv); 1648 SvREFCNT_dec (next_sv);
1416 /* coro_nready is already taken care of by destroy */ 1649 /* coro_nready has already been taken care of by destroy */
1417 continue; 1650 continue;
1418 } 1651 }
1419 1652
1420 --coro_nready; 1653 --coro_nready;
1421 UNLOCK;
1422 break; 1654 break;
1423 } 1655 }
1424 1656
1425 /* free this only after the transfer */ 1657 /* free this only after the transfer */
1426 prev_sv = SvRV (coro_current); 1658 prev_sv = SvRV (coro_current);
1427 ta->prev = SvSTATE (prev_sv); 1659 ta->prev = SvSTATE_hv (prev_sv);
1428 TRANSFER_CHECK (*ta); 1660 TRANSFER_CHECK (*ta);
1429 assert (ta->next->flags & CF_READY); 1661 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1430 ta->next->flags &= ~CF_READY; 1662 ta->next->flags &= ~CF_READY;
1431 SvRV_set (coro_current, next_sv); 1663 SvRV_set (coro_current, next_sv);
1432 1664
1433 LOCK;
1434 free_coro_mortal (aTHX); 1665 free_coro_mortal (aTHX);
1435 coro_mortal = prev_sv; 1666 coro_mortal = prev_sv;
1436 UNLOCK;
1437} 1667}
1438 1668
1439static void 1669INLINE void
1440prepare_cede (pTHX_ struct transfer_args *ta) 1670prepare_cede (pTHX_ struct coro_transfer_args *ta)
1441{ 1671{
1442 api_ready (coro_current); 1672 api_ready (aTHX_ coro_current);
1443 prepare_schedule (aTHX_ ta); 1673 prepare_schedule (aTHX_ ta);
1444} 1674}
1445 1675
1676INLINE void
1677prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1678{
1679 SV *prev = SvRV (coro_current);
1680
1681 if (coro_nready)
1682 {
1683 prepare_schedule (aTHX_ ta);
1684 api_ready (aTHX_ prev);
1685 }
1686 else
1687 prepare_nop (aTHX_ ta);
1688}
1689
1690static void
1691api_schedule (pTHX)
1692{
1693 struct coro_transfer_args ta;
1694
1695 prepare_schedule (aTHX_ &ta);
1696 TRANSFER (ta, 1);
1697}
1698
1446static int 1699static int
1447prepare_cede_notself (pTHX_ struct transfer_args *ta) 1700api_cede (pTHX)
1448{ 1701{
1449 if (coro_nready) 1702 struct coro_transfer_args ta;
1450 { 1703
1451 SV *prev = SvRV (coro_current);
1452 prepare_schedule (aTHX_ ta); 1704 prepare_cede (aTHX_ &ta);
1453 api_ready (prev); 1705
1706 if (expect_true (ta.prev != ta.next))
1707 {
1708 TRANSFER (ta, 1);
1454 return 1; 1709 return 1;
1455 } 1710 }
1456 else 1711 else
1457 return 0; 1712 return 0;
1458} 1713}
1459 1714
1460static void
1461api_schedule (void)
1462{
1463 dTHX;
1464 struct transfer_args ta;
1465
1466 prepare_schedule (aTHX_ &ta);
1467 TRANSFER (ta);
1468}
1469
1470static int 1715static int
1471api_cede (void) 1716api_cede_notself (pTHX)
1472{ 1717{
1473 dTHX; 1718 if (coro_nready)
1719 {
1474 struct transfer_args ta; 1720 struct coro_transfer_args ta;
1475 1721
1476 prepare_cede (aTHX_ &ta); 1722 prepare_cede_notself (aTHX_ &ta);
1477
1478 if (expect_true (ta.prev != ta.next))
1479 {
1480 TRANSFER (ta); 1723 TRANSFER (ta, 1);
1481 return 1; 1724 return 1;
1482 } 1725 }
1483 else 1726 else
1484 return 0; 1727 return 0;
1485} 1728}
1486 1729
1487static int 1730static void
1488api_cede_notself (void)
1489{
1490 dTHX;
1491 struct transfer_args ta;
1492
1493 if (prepare_cede_notself (aTHX_ &ta))
1494 {
1495 TRANSFER (ta);
1496 return 1;
1497 }
1498 else
1499 return 0;
1500}
1501
1502static void
1503api_trace (SV *coro_sv, int flags) 1731api_trace (pTHX_ SV *coro_sv, int flags)
1504{ 1732{
1505 dTHX;
1506 struct coro *coro = SvSTATE (coro_sv); 1733 struct coro *coro = SvSTATE (coro_sv);
1507 1734
1508 if (flags & CC_TRACE) 1735 if (flags & CC_TRACE)
1509 { 1736 {
1510 if (!coro->cctx) 1737 if (!coro->cctx)
1511 coro->cctx = cctx_new (); 1738 coro->cctx = cctx_new_run ();
1512 else if (!(coro->cctx->flags & CC_TRACE)) 1739 else if (!(coro->cctx->flags & CC_TRACE))
1513 croak ("cannot enable tracing on coroutine with custom stack"); 1740 croak ("cannot enable tracing on coroutine with custom stack,");
1514 1741
1515 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL)); 1742 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1516 } 1743 }
1517 else if (coro->cctx && coro->cctx->flags & CC_TRACE) 1744 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1518 { 1745 {
… …
1523 else 1750 else
1524 coro->slot->runops = RUNOPS_DEFAULT; 1751 coro->slot->runops = RUNOPS_DEFAULT;
1525 } 1752 }
1526} 1753}
1527 1754
1755/*****************************************************************************/
1756/* async pool handler */
1757
1758static int
1759slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1760{
1761 HV *hv = (HV *)SvRV (coro_current);
1762 struct coro *coro = (struct coro *)frame->data;
1763
1764 if (!coro->invoke_cb)
1765 return 1; /* loop till we have invoke */
1766 else
1767 {
1768 hv_store (hv, "desc", sizeof ("desc") - 1,
1769 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1770
1771 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1772
1773 {
1774 dSP;
1775 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1776 PUTBACK;
1777 }
1778
1779 SvREFCNT_dec (GvAV (PL_defgv));
1780 GvAV (PL_defgv) = coro->invoke_av;
1781 coro->invoke_av = 0;
1782
1783 return 0;
1784 }
1785}
1786
1787static void
1788slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1789{
1790 HV *hv = (HV *)SvRV (coro_current);
1791 struct coro *coro = SvSTATE_hv ((SV *)hv);
1792
1793 if (expect_true (coro->saved_deffh))
1794 {
1795 /* subsequent iteration */
1796 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1797 coro->saved_deffh = 0;
1798
1799 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1800 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1801 {
1802 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1803 coro->invoke_av = newAV ();
1804
1805 frame->prepare = prepare_nop;
1806 }
1807 else
1808 {
1809 av_clear (GvAV (PL_defgv));
1810 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1811
1812 coro->prio = 0;
1813
1814 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1815 api_trace (aTHX_ coro_current, 0);
1816
1817 frame->prepare = prepare_schedule;
1818 av_push (av_async_pool, SvREFCNT_inc (hv));
1819 }
1820 }
1821 else
1822 {
1823 /* first iteration, simply fall through */
1824 frame->prepare = prepare_nop;
1825 }
1826
1827 frame->check = slf_check_pool_handler;
1828 frame->data = (void *)coro;
1829}
1830
1831/*****************************************************************************/
1832/* rouse callback */
1833
1834#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1835
1836static void
1837coro_rouse_callback (pTHX_ CV *cv)
1838{
1839 dXSARGS;
1840 SV *data = (SV *)GENSUB_ARG;
1841
1842 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1843 {
1844 /* first call, set args */
1845 AV *av = newAV ();
1846 SV *coro = SvRV (data);
1847
1848 SvRV_set (data, (SV *)av);
1849 api_ready (aTHX_ coro);
1850 SvREFCNT_dec (coro);
1851
1852 /* better take a full copy of the arguments */
1853 while (items--)
1854 av_store (av, items, newSVsv (ST (items)));
1855 }
1856
1857 XSRETURN_EMPTY;
1858}
1859
1860static int
1861slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1862{
1863 SV *data = (SV *)frame->data;
1864
1865 if (CORO_THROW)
1866 return 0;
1867
1868 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1869 return 1;
1870
1871 /* now push all results on the stack */
1872 {
1873 dSP;
1874 AV *av = (AV *)SvRV (data);
1875 int i;
1876
1877 EXTEND (SP, AvFILLp (av) + 1);
1878 for (i = 0; i <= AvFILLp (av); ++i)
1879 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1880
1881 /* we have stolen the elements, so ste length to zero and free */
1882 AvFILLp (av) = -1;
1883 av_undef (av);
1884
1885 PUTBACK;
1886 }
1887
1888 return 0;
1889}
1890
1891static void
1892slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1893{
1894 SV *cb;
1895
1896 if (items)
1897 cb = arg [0];
1898 else
1899 {
1900 struct coro *coro = SvSTATE_current;
1901
1902 if (!coro->rouse_cb)
1903 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1904
1905 cb = sv_2mortal (coro->rouse_cb);
1906 coro->rouse_cb = 0;
1907 }
1908
1909 if (!SvROK (cb)
1910 || SvTYPE (SvRV (cb)) != SVt_PVCV
1911 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1912 croak ("Coro::rouse_wait called with illegal callback argument,");
1913
1914 {
1915 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1916 SV *data = (SV *)GENSUB_ARG;
1917
1918 frame->data = (void *)data;
1919 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1920 frame->check = slf_check_rouse_wait;
1921 }
1922}
1923
1924static SV *
1925coro_new_rouse_cb (pTHX)
1926{
1927 HV *hv = (HV *)SvRV (coro_current);
1928 struct coro *coro = SvSTATE_hv (hv);
1929 SV *data = newRV_inc ((SV *)hv);
1930 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1931
1932 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1933 SvREFCNT_dec (data); /* magicext increases the refcount */
1934
1935 SvREFCNT_dec (coro->rouse_cb);
1936 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1937
1938 return cb;
1939}
1940
1941/*****************************************************************************/
1942/* schedule-like-function opcode (SLF) */
1943
1944static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1945static const CV *slf_cv;
1946static SV **slf_argv;
1947static int slf_argc, slf_arga; /* count, allocated */
1948static I32 slf_ax; /* top of stack, for restore */
1949
1950/* this restores the stack in the case we patched the entersub, to */
1951/* recreate the stack frame as perl will on following calls */
1952/* since entersub cleared the stack */
1953static OP *
1954pp_restore (pTHX)
1955{
1956 int i;
1957 SV **SP = PL_stack_base + slf_ax;
1958
1959 PUSHMARK (SP);
1960
1961 EXTEND (SP, slf_argc + 1);
1962
1963 for (i = 0; i < slf_argc; ++i)
1964 PUSHs (sv_2mortal (slf_argv [i]));
1965
1966 PUSHs ((SV *)CvGV (slf_cv));
1967
1968 RETURNOP (slf_restore.op_first);
1969}
1970
1971static void
1972slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV **arg = (SV **)slf_frame.data;
1975
1976 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1977}
1978
1979static void
1980slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1981{
1982 if (items != 2)
1983 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1984
1985 frame->prepare = slf_prepare_transfer;
1986 frame->check = slf_check_nop;
1987 frame->data = (void *)arg; /* let's hope it will stay valid */
1988}
1989
1990static void
1991slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 frame->prepare = prepare_schedule;
1994 frame->check = slf_check_nop;
1995}
1996
1997static void
1998slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1999{
2000 frame->prepare = prepare_cede;
2001 frame->check = slf_check_nop;
2002}
2003
2004static void
2005slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2006{
2007 frame->prepare = prepare_cede_notself;
2008 frame->check = slf_check_nop;
2009}
2010
2011/*
2012 * these not obviously related functions are all rolled into one
2013 * function to increase chances that they all will call transfer with the same
2014 * stack offset
2015 * SLF stands for "schedule-like-function".
2016 */
2017static OP *
2018pp_slf (pTHX)
2019{
2020 I32 checkmark; /* mark SP to see how many elements check has pushed */
2021
2022 /* set up the slf frame, unless it has already been set-up */
2023 /* the latter happens when a new coro has been started */
2024 /* or when a new cctx was attached to an existing coroutine */
2025 if (expect_true (!slf_frame.prepare))
2026 {
2027 /* first iteration */
2028 dSP;
2029 SV **arg = PL_stack_base + TOPMARK + 1;
2030 int items = SP - arg; /* args without function object */
2031 SV *gv = *sp;
2032
2033 /* do a quick consistency check on the "function" object, and if it isn't */
2034 /* for us, divert to the real entersub */
2035 if (SvTYPE (gv) != SVt_PVGV
2036 || !GvCV (gv)
2037 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2038 return PL_ppaddr[OP_ENTERSUB](aTHX);
2039
2040 if (!(PL_op->op_flags & OPf_STACKED))
2041 {
2042 /* ampersand-form of call, use @_ instead of stack */
2043 AV *av = GvAV (PL_defgv);
2044 arg = AvARRAY (av);
2045 items = AvFILLp (av) + 1;
2046 }
2047
2048 /* now call the init function, which needs to set up slf_frame */
2049 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2050 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2051
2052 /* pop args */
2053 SP = PL_stack_base + POPMARK;
2054
2055 PUTBACK;
2056 }
2057
2058 /* now that we have a slf_frame, interpret it! */
2059 /* we use a callback system not to make the code needlessly */
2060 /* complicated, but so we can run multiple perl coros from one cctx */
2061
2062 do
2063 {
2064 struct coro_transfer_args ta;
2065
2066 slf_frame.prepare (aTHX_ &ta);
2067 TRANSFER (ta, 0);
2068
2069 checkmark = PL_stack_sp - PL_stack_base;
2070 }
2071 while (slf_frame.check (aTHX_ &slf_frame));
2072
2073 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2074
2075 /* exception handling */
2076 if (expect_false (CORO_THROW))
2077 {
2078 SV *exception = sv_2mortal (CORO_THROW);
2079
2080 CORO_THROW = 0;
2081 sv_setsv (ERRSV, exception);
2082 croak (0);
2083 }
2084
2085 /* return value handling - mostly like entersub */
2086 /* make sure we put something on the stack in scalar context */
2087 if (GIMME_V == G_SCALAR)
2088 {
2089 dSP;
2090 SV **bot = PL_stack_base + checkmark;
2091
2092 if (sp == bot) /* too few, push undef */
2093 bot [1] = &PL_sv_undef;
2094 else if (sp != bot + 1) /* too many, take last one */
2095 bot [1] = *sp;
2096
2097 SP = bot + 1;
2098
2099 PUTBACK;
2100 }
2101
2102 return NORMAL;
2103}
2104
2105static void
2106api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2107{
2108 int i;
2109 SV **arg = PL_stack_base + ax;
2110 int items = PL_stack_sp - arg + 1;
2111
2112 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2113
2114 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2115 && PL_op->op_ppaddr != pp_slf)
2116 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2117
2118 CvFLAGS (cv) |= CVf_SLF;
2119 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2120 slf_cv = cv;
2121
2122 /* we patch the op, and then re-run the whole call */
2123 /* we have to put the same argument on the stack for this to work */
2124 /* and this will be done by pp_restore */
2125 slf_restore.op_next = (OP *)&slf_restore;
2126 slf_restore.op_type = OP_CUSTOM;
2127 slf_restore.op_ppaddr = pp_restore;
2128 slf_restore.op_first = PL_op;
2129
2130 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2131
2132 if (PL_op->op_flags & OPf_STACKED)
2133 {
2134 if (items > slf_arga)
2135 {
2136 slf_arga = items;
2137 free (slf_argv);
2138 slf_argv = malloc (slf_arga * sizeof (SV *));
2139 }
2140
2141 slf_argc = items;
2142
2143 for (i = 0; i < items; ++i)
2144 slf_argv [i] = SvREFCNT_inc (arg [i]);
2145 }
2146 else
2147 slf_argc = 0;
2148
2149 PL_op->op_ppaddr = pp_slf;
2150 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2151
2152 PL_op = (OP *)&slf_restore;
2153}
2154
2155/*****************************************************************************/
2156/* PerlIO::cede */
2157
2158typedef struct
2159{
2160 PerlIOBuf base;
2161 NV next, every;
2162} PerlIOCede;
2163
2164static IV
2165PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2166{
2167 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2168
2169 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2170 self->next = nvtime () + self->every;
2171
2172 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2173}
2174
2175static SV *
2176PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2177{
2178 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2179
2180 return newSVnv (self->every);
2181}
2182
2183static IV
2184PerlIOCede_flush (pTHX_ PerlIO *f)
2185{
2186 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2187 double now = nvtime ();
2188
2189 if (now >= self->next)
2190 {
2191 api_cede (aTHX);
2192 self->next = now + self->every;
2193 }
2194
2195 return PerlIOBuf_flush (aTHX_ f);
2196}
2197
2198static PerlIO_funcs PerlIO_cede =
2199{
2200 sizeof(PerlIO_funcs),
2201 "cede",
2202 sizeof(PerlIOCede),
2203 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2204 PerlIOCede_pushed,
2205 PerlIOBuf_popped,
2206 PerlIOBuf_open,
2207 PerlIOBase_binmode,
2208 PerlIOCede_getarg,
2209 PerlIOBase_fileno,
2210 PerlIOBuf_dup,
2211 PerlIOBuf_read,
2212 PerlIOBuf_unread,
2213 PerlIOBuf_write,
2214 PerlIOBuf_seek,
2215 PerlIOBuf_tell,
2216 PerlIOBuf_close,
2217 PerlIOCede_flush,
2218 PerlIOBuf_fill,
2219 PerlIOBase_eof,
2220 PerlIOBase_error,
2221 PerlIOBase_clearerr,
2222 PerlIOBase_setlinebuf,
2223 PerlIOBuf_get_base,
2224 PerlIOBuf_bufsiz,
2225 PerlIOBuf_get_ptr,
2226 PerlIOBuf_get_cnt,
2227 PerlIOBuf_set_ptrcnt,
2228};
2229
2230/*****************************************************************************/
2231/* Coro::Semaphore & Coro::Signal */
2232
2233static SV *
2234coro_waitarray_new (pTHX_ int count)
2235{
2236 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2237 AV *av = newAV ();
2238 SV **ary;
2239
2240 /* unfortunately, building manually saves memory */
2241 Newx (ary, 2, SV *);
2242 AvALLOC (av) = ary;
2243 /*AvARRAY (av) = ary;*/
2244 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2245 AvMAX (av) = 1;
2246 AvFILLp (av) = 0;
2247 ary [0] = newSViv (count);
2248
2249 return newRV_noinc ((SV *)av);
2250}
2251
2252/* semaphore */
2253
2254static void
2255coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2256{
2257 SV *count_sv = AvARRAY (av)[0];
2258 IV count = SvIVX (count_sv);
2259
2260 count += adjust;
2261 SvIVX (count_sv) = count;
2262
2263 /* now wake up as many waiters as are expected to lock */
2264 while (count > 0 && AvFILLp (av) > 0)
2265 {
2266 SV *cb;
2267
2268 /* swap first two elements so we can shift a waiter */
2269 AvARRAY (av)[0] = AvARRAY (av)[1];
2270 AvARRAY (av)[1] = count_sv;
2271 cb = av_shift (av);
2272
2273 if (SvOBJECT (cb))
2274 {
2275 api_ready (aTHX_ cb);
2276 --count;
2277 }
2278 else if (SvTYPE (cb) == SVt_PVCV)
2279 {
2280 dSP;
2281 PUSHMARK (SP);
2282 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2283 PUTBACK;
2284 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2285 }
2286
2287 SvREFCNT_dec (cb);
2288 }
2289}
2290
2291static void
2292coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2293{
2294 /* call $sem->adjust (0) to possibly wake up some other waiters */
2295 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2296}
2297
2298static int
2299slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2300{
2301 AV *av = (AV *)frame->data;
2302 SV *count_sv = AvARRAY (av)[0];
2303
2304 /* if we are about to throw, don't actually acquire the lock, just throw */
2305 if (CORO_THROW)
2306 return 0;
2307 else if (SvIVX (count_sv) > 0)
2308 {
2309 SvSTATE_current->on_destroy = 0;
2310
2311 if (acquire)
2312 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2313 else
2314 coro_semaphore_adjust (aTHX_ av, 0);
2315
2316 return 0;
2317 }
2318 else
2319 {
2320 int i;
2321 /* if we were woken up but can't down, we look through the whole */
2322 /* waiters list and only add us if we aren't in there already */
2323 /* this avoids some degenerate memory usage cases */
2324
2325 for (i = 1; i <= AvFILLp (av); ++i)
2326 if (AvARRAY (av)[i] == SvRV (coro_current))
2327 return 1;
2328
2329 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2330 return 1;
2331 }
2332}
2333
2334static int
2335slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2336{
2337 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2338}
2339
2340static int
2341slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2342{
2343 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2344}
2345
2346static void
2347slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2348{
2349 AV *av = (AV *)SvRV (arg [0]);
2350
2351 if (SvIVX (AvARRAY (av)[0]) > 0)
2352 {
2353 frame->data = (void *)av;
2354 frame->prepare = prepare_nop;
2355 }
2356 else
2357 {
2358 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2359
2360 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2361 frame->prepare = prepare_schedule;
2362
2363 /* to avoid race conditions when a woken-up coro gets terminated */
2364 /* we arrange for a temporary on_destroy that calls adjust (0) */
2365 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2366 }
2367}
2368
2369static void
2370slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2371{
2372 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2373 frame->check = slf_check_semaphore_down;
2374}
2375
2376static void
2377slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items >= 2)
2380 {
2381 /* callback form */
2382 AV *av = (AV *)SvRV (arg [0]);
2383 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2384
2385 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2386
2387 if (SvIVX (AvARRAY (av)[0]) > 0)
2388 coro_semaphore_adjust (aTHX_ av, 0);
2389
2390 frame->prepare = prepare_nop;
2391 frame->check = slf_check_nop;
2392 }
2393 else
2394 {
2395 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2396 frame->check = slf_check_semaphore_wait;
2397 }
2398}
2399
2400/* signal */
2401
2402static void
2403coro_signal_wake (pTHX_ AV *av, int count)
2404{
2405 SvIVX (AvARRAY (av)[0]) = 0;
2406
2407 /* now signal count waiters */
2408 while (count > 0 && AvFILLp (av) > 0)
2409 {
2410 SV *cb;
2411
2412 /* swap first two elements so we can shift a waiter */
2413 cb = AvARRAY (av)[0];
2414 AvARRAY (av)[0] = AvARRAY (av)[1];
2415 AvARRAY (av)[1] = cb;
2416
2417 cb = av_shift (av);
2418
2419 api_ready (aTHX_ cb);
2420 sv_setiv (cb, 0); /* signal waiter */
2421 SvREFCNT_dec (cb);
2422
2423 --count;
2424 }
2425}
2426
2427static int
2428slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2429{
2430 /* if we are about to throw, also stop waiting */
2431 return SvROK ((SV *)frame->data) && !CORO_THROW;
2432}
2433
2434static void
2435slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2436{
2437 AV *av = (AV *)SvRV (arg [0]);
2438
2439 if (SvIVX (AvARRAY (av)[0]))
2440 {
2441 SvIVX (AvARRAY (av)[0]) = 0;
2442 frame->prepare = prepare_nop;
2443 frame->check = slf_check_nop;
2444 }
2445 else
2446 {
2447 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2448
2449 av_push (av, waiter);
2450
2451 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2452 frame->prepare = prepare_schedule;
2453 frame->check = slf_check_signal_wait;
2454 }
2455}
2456
2457/*****************************************************************************/
2458/* Coro::AIO */
2459
2460#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2461
2462/* helper storage struct */
2463struct io_state
2464{
2465 int errorno;
2466 I32 laststype; /* U16 in 5.10.0 */
2467 int laststatval;
2468 Stat_t statcache;
2469};
2470
2471static void
2472coro_aio_callback (pTHX_ CV *cv)
2473{
2474 dXSARGS;
2475 AV *state = (AV *)GENSUB_ARG;
2476 SV *coro = av_pop (state);
2477 SV *data_sv = newSV (sizeof (struct io_state));
2478
2479 av_extend (state, items - 1);
2480
2481 sv_upgrade (data_sv, SVt_PV);
2482 SvCUR_set (data_sv, sizeof (struct io_state));
2483 SvPOK_only (data_sv);
2484
2485 {
2486 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2487
2488 data->errorno = errno;
2489 data->laststype = PL_laststype;
2490 data->laststatval = PL_laststatval;
2491 data->statcache = PL_statcache;
2492 }
2493
2494 /* now build the result vector out of all the parameters and the data_sv */
2495 {
2496 int i;
2497
2498 for (i = 0; i < items; ++i)
2499 av_push (state, SvREFCNT_inc_NN (ST (i)));
2500 }
2501
2502 av_push (state, data_sv);
2503
2504 api_ready (aTHX_ coro);
2505 SvREFCNT_dec (coro);
2506 SvREFCNT_dec ((AV *)state);
2507}
2508
2509static int
2510slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2511{
2512 AV *state = (AV *)frame->data;
2513
2514 /* if we are about to throw, return early */
2515 /* this does not cancel the aio request, but at least */
2516 /* it quickly returns */
2517 if (CORO_THROW)
2518 return 0;
2519
2520 /* one element that is an RV? repeat! */
2521 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2522 return 1;
2523
2524 /* restore status */
2525 {
2526 SV *data_sv = av_pop (state);
2527 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2528
2529 errno = data->errorno;
2530 PL_laststype = data->laststype;
2531 PL_laststatval = data->laststatval;
2532 PL_statcache = data->statcache;
2533
2534 SvREFCNT_dec (data_sv);
2535 }
2536
2537 /* push result values */
2538 {
2539 dSP;
2540 int i;
2541
2542 EXTEND (SP, AvFILLp (state) + 1);
2543 for (i = 0; i <= AvFILLp (state); ++i)
2544 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2545
2546 PUTBACK;
2547 }
2548
2549 return 0;
2550}
2551
2552static void
2553slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2554{
2555 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2556 SV *coro_hv = SvRV (coro_current);
2557 struct coro *coro = SvSTATE_hv (coro_hv);
2558
2559 /* put our coroutine id on the state arg */
2560 av_push (state, SvREFCNT_inc_NN (coro_hv));
2561
2562 /* first see whether we have a non-zero priority and set it as AIO prio */
2563 if (coro->prio)
2564 {
2565 dSP;
2566
2567 static SV *prio_cv;
2568 static SV *prio_sv;
2569
2570 if (expect_false (!prio_cv))
2571 {
2572 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2573 prio_sv = newSViv (0);
2574 }
2575
2576 PUSHMARK (SP);
2577 sv_setiv (prio_sv, coro->prio);
2578 XPUSHs (prio_sv);
2579
2580 PUTBACK;
2581 call_sv (prio_cv, G_VOID | G_DISCARD);
2582 }
2583
2584 /* now call the original request */
2585 {
2586 dSP;
2587 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2588 int i;
2589
2590 PUSHMARK (SP);
2591
2592 /* first push all args to the stack */
2593 EXTEND (SP, items + 1);
2594
2595 for (i = 0; i < items; ++i)
2596 PUSHs (arg [i]);
2597
2598 /* now push the callback closure */
2599 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2600
2601 /* now call the AIO function - we assume our request is uncancelable */
2602 PUTBACK;
2603 call_sv ((SV *)req, G_VOID | G_DISCARD);
2604 }
2605
2606 /* now that the requets is going, we loop toll we have a result */
2607 frame->data = (void *)state;
2608 frame->prepare = prepare_schedule;
2609 frame->check = slf_check_aio_req;
2610}
2611
2612static void
2613coro_aio_req_xs (pTHX_ CV *cv)
2614{
2615 dXSARGS;
2616
2617 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2618
2619 XSRETURN_EMPTY;
2620}
2621
2622/*****************************************************************************/
2623
1528MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_ 2624MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1529 2625
1530PROTOTYPES: DISABLE 2626PROTOTYPES: DISABLE
1531 2627
1532BOOT: 2628BOOT:
1533{ 2629{
1534#ifdef USE_ITHREADS 2630#ifdef USE_ITHREADS
1535 MUTEX_INIT (&coro_mutex); 2631# if CORO_PTHREAD
2632 coro_thx = PERL_GET_CONTEXT;
2633# endif
1536#endif 2634#endif
1537 BOOT_PAGESIZE; 2635 BOOT_PAGESIZE;
1538 2636
1539 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV); 2637 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1540 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO); 2638 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1541#if 0 2639
1542 orig_sigelem_get = PL_vtbl_sigelem.svt_get; 2640 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1543 PL_vtbl_sigelem.svt_get = coro_sigelem_get; 2641 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1544#endif 2642 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2643
1545 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE); 2644 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1546 rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV)); 2645 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1547 rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV)); 2646 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1548 2647
1549 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2648 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1550 2649
1551 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE)); 2650 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1552 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB)); 2651 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
… …
1557 main_top_env = PL_top_env; 2656 main_top_env = PL_top_env;
1558 2657
1559 while (main_top_env->je_prev) 2658 while (main_top_env->je_prev)
1560 main_top_env = main_top_env->je_prev; 2659 main_top_env = main_top_env->je_prev;
1561 2660
2661 {
2662 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2663
2664 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2665 hv_store_ent (PL_custom_op_names, slf,
2666 newSVpv ("coro_slf", 0), 0);
2667
2668 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2669 hv_store_ent (PL_custom_op_descs, slf,
2670 newSVpv ("coro schedule like function", 0), 0);
2671 }
2672
1562 coroapi.ver = CORO_API_VERSION; 2673 coroapi.ver = CORO_API_VERSION;
1563 coroapi.rev = CORO_API_REVISION; 2674 coroapi.rev = CORO_API_REVISION;
2675
1564 coroapi.transfer = api_transfer; 2676 coroapi.transfer = api_transfer;
2677
2678 coroapi.sv_state = SvSTATE_;
2679 coroapi.execute_slf = api_execute_slf;
2680 coroapi.prepare_nop = prepare_nop;
2681 coroapi.prepare_schedule = prepare_schedule;
2682 coroapi.prepare_cede = prepare_cede;
2683 coroapi.prepare_cede_notself = prepare_cede_notself;
2684
2685 {
2686 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2687
2688 if (!svp) croak ("Time::HiRes is required");
2689 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2690
2691 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2692 }
1565 2693
1566 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2694 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1567} 2695}
1568 2696
1569SV * 2697SV *
1570new (char *klass, ...) 2698new (char *klass, ...)
2699 ALIAS:
2700 Coro::new = 1
1571 CODE: 2701 CODE:
1572{ 2702{
1573 struct coro *coro; 2703 struct coro *coro;
1574 MAGIC *mg; 2704 MAGIC *mg;
1575 HV *hv; 2705 HV *hv;
2706 CV *cb;
1576 int i; 2707 int i;
2708
2709 if (items > 1)
2710 {
2711 cb = coro_sv_2cv (aTHX_ ST (1));
2712
2713 if (!ix)
2714 {
2715 if (CvISXSUB (cb))
2716 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2717
2718 if (!CvROOT (cb))
2719 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2720 }
2721 }
1577 2722
1578 Newz (0, coro, 1, struct coro); 2723 Newz (0, coro, 1, struct coro);
1579 coro->args = newAV (); 2724 coro->args = newAV ();
1580 coro->flags = CF_NEW; 2725 coro->flags = CF_NEW;
1581 2726
… …
1586 coro->hv = hv = newHV (); 2731 coro->hv = hv = newHV ();
1587 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0); 2732 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1588 mg->mg_flags |= MGf_DUP; 2733 mg->mg_flags |= MGf_DUP;
1589 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2734 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1590 2735
2736 if (items > 1)
2737 {
1591 av_extend (coro->args, items - 1); 2738 av_extend (coro->args, items - 1 + ix - 1);
2739
2740 if (ix)
2741 {
2742 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2743 cb = cv_coro_run;
2744 }
2745
2746 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2747
1592 for (i = 1; i < items; i++) 2748 for (i = 2; i < items; i++)
1593 av_push (coro->args, newSVsv (ST (i))); 2749 av_push (coro->args, newSVsv (ST (i)));
2750 }
1594} 2751}
1595 OUTPUT: 2752 OUTPUT:
1596 RETVAL 2753 RETVAL
1597 2754
1598# these not obviously related functions are all rolled into the same xs
1599# function to increase chances that they all will call transfer with the same
1600# stack offset
1601void 2755void
1602_set_stacklevel (...) 2756transfer (...)
1603 ALIAS: 2757 PROTOTYPE: $$
1604 Coro::State::transfer = 1 2758 CODE:
1605 Coro::schedule = 2 2759 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1606 Coro::cede = 3
1607 Coro::cede_notself = 4
1608 CODE:
1609{
1610 struct transfer_args ta;
1611
1612 switch (ix)
1613 {
1614 case 0:
1615 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1616 ta.next = 0;
1617 break;
1618
1619 case 1:
1620 if (items != 2)
1621 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1622
1623 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1624 break;
1625
1626 case 2:
1627 prepare_schedule (aTHX_ &ta);
1628 break;
1629
1630 case 3:
1631 prepare_cede (aTHX_ &ta);
1632 break;
1633
1634 case 4:
1635 if (!prepare_cede_notself (aTHX_ &ta))
1636 XSRETURN_EMPTY;
1637
1638 break;
1639 }
1640
1641 BARRIER;
1642 PUTBACK;
1643 TRANSFER (ta);
1644 SPAGAIN; /* might be the sp of a different coroutine now */
1645 /* be extra careful not to ever do anything after TRANSFER */
1646}
1647 2760
1648bool 2761bool
1649_destroy (SV *coro_sv) 2762_destroy (SV *coro_sv)
1650 CODE: 2763 CODE:
1651 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv)); 2764 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1652 OUTPUT: 2765 OUTPUT:
1653 RETVAL 2766 RETVAL
1654 2767
1655void 2768void
1656_exit (code) 2769_exit (int code)
1657 int code
1658 PROTOTYPE: $ 2770 PROTOTYPE: $
1659 CODE: 2771 CODE:
1660 _exit (code); 2772 _exit (code);
1661 2773
1662int 2774int
1663cctx_stacksize (int new_stacksize = 0) 2775cctx_stacksize (int new_stacksize = 0)
2776 PROTOTYPE: ;$
1664 CODE: 2777 CODE:
1665 RETVAL = coro_stacksize; 2778 RETVAL = cctx_stacksize;
1666 if (new_stacksize) 2779 if (new_stacksize)
2780 {
1667 coro_stacksize = new_stacksize; 2781 cctx_stacksize = new_stacksize;
2782 ++cctx_gen;
2783 }
1668 OUTPUT: 2784 OUTPUT:
1669 RETVAL 2785 RETVAL
1670 2786
1671int 2787int
2788cctx_max_idle (int max_idle = 0)
2789 PROTOTYPE: ;$
2790 CODE:
2791 RETVAL = cctx_max_idle;
2792 if (max_idle > 1)
2793 cctx_max_idle = max_idle;
2794 OUTPUT:
2795 RETVAL
2796
2797int
1672cctx_count () 2798cctx_count ()
2799 PROTOTYPE:
1673 CODE: 2800 CODE:
1674 RETVAL = cctx_count; 2801 RETVAL = cctx_count;
1675 OUTPUT: 2802 OUTPUT:
1676 RETVAL 2803 RETVAL
1677 2804
1678int 2805int
1679cctx_idle () 2806cctx_idle ()
2807 PROTOTYPE:
1680 CODE: 2808 CODE:
1681 RETVAL = cctx_idle; 2809 RETVAL = cctx_idle;
1682 OUTPUT: 2810 OUTPUT:
1683 RETVAL 2811 RETVAL
1684 2812
1685void 2813void
1686list () 2814list ()
2815 PROTOTYPE:
1687 PPCODE: 2816 PPCODE:
1688{ 2817{
1689 struct coro *coro; 2818 struct coro *coro;
1690 for (coro = coro_first; coro; coro = coro->next) 2819 for (coro = coro_first; coro; coro = coro->next)
1691 if (coro->hv) 2820 if (coro->hv)
… …
1696call (Coro::State coro, SV *coderef) 2825call (Coro::State coro, SV *coderef)
1697 ALIAS: 2826 ALIAS:
1698 eval = 1 2827 eval = 1
1699 CODE: 2828 CODE:
1700{ 2829{
1701 if (coro->mainstack) 2830 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1702 { 2831 {
1703 struct coro temp; 2832 struct coro temp;
1704 2833
1705 if (!(coro->flags & CF_RUNNING)) 2834 if (!(coro->flags & CF_RUNNING))
1706 { 2835 {
2836 PUTBACK;
1707 save_perl (aTHX_ &temp); 2837 save_perl (aTHX_ &temp);
1708 load_perl (aTHX_ coro); 2838 load_perl (aTHX_ coro);
1709 } 2839 }
1710 2840
1711 { 2841 {
… …
1730 2860
1731 if (!(coro->flags & CF_RUNNING)) 2861 if (!(coro->flags & CF_RUNNING))
1732 { 2862 {
1733 save_perl (aTHX_ coro); 2863 save_perl (aTHX_ coro);
1734 load_perl (aTHX_ &temp); 2864 load_perl (aTHX_ &temp);
2865 SPAGAIN;
1735 } 2866 }
1736 } 2867 }
1737} 2868}
1738 2869
1739SV * 2870SV *
… …
1748 RETVAL = boolSV (coro->flags & ix); 2879 RETVAL = boolSV (coro->flags & ix);
1749 OUTPUT: 2880 OUTPUT:
1750 RETVAL 2881 RETVAL
1751 2882
1752void 2883void
2884throw (Coro::State self, SV *throw = &PL_sv_undef)
2885 PROTOTYPE: $;$
2886 CODE:
2887{
2888 struct coro *current = SvSTATE_current;
2889 SV **throwp = self == current ? &CORO_THROW : &self->except;
2890 SvREFCNT_dec (*throwp);
2891 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2892}
2893
2894void
1753api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB) 2895api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2896 PROTOTYPE: $;$
2897 C_ARGS: aTHX_ coro, flags
1754 2898
1755SV * 2899SV *
1756has_stack (Coro::State coro) 2900has_cctx (Coro::State coro)
1757 PROTOTYPE: $ 2901 PROTOTYPE: $
1758 CODE: 2902 CODE:
1759 RETVAL = boolSV (!!coro->cctx); 2903 RETVAL = boolSV (!!coro->cctx);
1760 OUTPUT: 2904 OUTPUT:
1761 RETVAL 2905 RETVAL
… …
1766 CODE: 2910 CODE:
1767 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL; 2911 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1768 OUTPUT: 2912 OUTPUT:
1769 RETVAL 2913 RETVAL
1770 2914
1771IV 2915UV
1772rss (Coro::State coro) 2916rss (Coro::State coro)
1773 PROTOTYPE: $ 2917 PROTOTYPE: $
1774 ALIAS: 2918 ALIAS:
1775 usecount = 1 2919 usecount = 1
1776 CODE: 2920 CODE:
… …
1780 case 1: RETVAL = coro->usecount; break; 2924 case 1: RETVAL = coro->usecount; break;
1781 } 2925 }
1782 OUTPUT: 2926 OUTPUT:
1783 RETVAL 2927 RETVAL
1784 2928
2929void
2930force_cctx ()
2931 PROTOTYPE:
2932 CODE:
2933 SvSTATE_current->cctx->idle_sp = 0;
2934
2935void
2936swap_defsv (Coro::State self)
2937 PROTOTYPE: $
2938 ALIAS:
2939 swap_defav = 1
2940 CODE:
2941 if (!self->slot)
2942 croak ("cannot swap state with coroutine that has no saved state,");
2943 else
2944 {
2945 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2946 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2947
2948 SV *tmp = *src; *src = *dst; *dst = tmp;
2949 }
2950
1785 2951
1786MODULE = Coro::State PACKAGE = Coro 2952MODULE = Coro::State PACKAGE = Coro
1787 2953
1788BOOT: 2954BOOT:
1789{ 2955{
1790 int i; 2956 int i;
1791 2957
1792 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1793 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1794 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE); 2958 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1795 2959 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2960 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2961 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2962 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
1796 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE); 2963 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
1797 SvREADONLY_on (coro_current); 2964
2965 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2966 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2967 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
2968 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
1798 2969
1799 coro_stash = gv_stashpv ("Coro", TRUE); 2970 coro_stash = gv_stashpv ("Coro", TRUE);
1800 2971
1801 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2972 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1802 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2973 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
… …
1807 2978
1808 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2979 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1809 coro_ready[i] = newAV (); 2980 coro_ready[i] = newAV ();
1810 2981
1811 { 2982 {
1812 SV *sv = perl_get_sv ("Coro::API", TRUE); 2983 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1813 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1814 2984
1815 coroapi.schedule = api_schedule; 2985 coroapi.schedule = api_schedule;
1816 coroapi.cede = api_cede; 2986 coroapi.cede = api_cede;
1817 coroapi.cede_notself = api_cede_notself; 2987 coroapi.cede_notself = api_cede_notself;
1818 coroapi.ready = api_ready; 2988 coroapi.ready = api_ready;
1819 coroapi.is_ready = api_is_ready; 2989 coroapi.is_ready = api_is_ready;
1820 coroapi.nready = &coro_nready; 2990 coroapi.nready = coro_nready;
1821 coroapi.current = coro_current; 2991 coroapi.current = coro_current;
1822 2992
1823 GCoroAPI = &coroapi; 2993 /*GCoroAPI = &coroapi;*/
1824 sv_setiv (sv, (IV)&coroapi); 2994 sv_setiv (sv, (IV)&coroapi);
1825 SvREADONLY_on (sv); 2995 SvREADONLY_on (sv);
1826 } 2996 }
1827} 2997}
2998
2999void
3000schedule (...)
3001 CODE:
3002 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3003
3004void
3005cede (...)
3006 CODE:
3007 CORO_EXECUTE_SLF_XS (slf_init_cede);
3008
3009void
3010cede_notself (...)
3011 CODE:
3012 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
1828 3013
1829void 3014void
1830_set_current (SV *current) 3015_set_current (SV *current)
1831 PROTOTYPE: $ 3016 PROTOTYPE: $
1832 CODE: 3017 CODE:
1833 SvREFCNT_dec (SvRV (coro_current)); 3018 SvREFCNT_dec (SvRV (coro_current));
1834 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current))); 3019 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3020
3021void
3022_set_readyhook (SV *hook)
3023 PROTOTYPE: $
3024 CODE:
3025 SvREFCNT_dec (coro_readyhook);
3026 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1835 3027
1836int 3028int
1837prio (Coro::State coro, int newprio = 0) 3029prio (Coro::State coro, int newprio = 0)
3030 PROTOTYPE: $;$
1838 ALIAS: 3031 ALIAS:
1839 nice = 1 3032 nice = 1
1840 CODE: 3033 CODE:
1841{ 3034{
1842 RETVAL = coro->prio; 3035 RETVAL = coro->prio;
… …
1857 3050
1858SV * 3051SV *
1859ready (SV *self) 3052ready (SV *self)
1860 PROTOTYPE: $ 3053 PROTOTYPE: $
1861 CODE: 3054 CODE:
1862 RETVAL = boolSV (api_ready (self)); 3055 RETVAL = boolSV (api_ready (aTHX_ self));
1863 OUTPUT: 3056 OUTPUT:
1864 RETVAL 3057 RETVAL
1865 3058
1866int 3059int
1867nready (...) 3060nready (...)
… …
1870 RETVAL = coro_nready; 3063 RETVAL = coro_nready;
1871 OUTPUT: 3064 OUTPUT:
1872 RETVAL 3065 RETVAL
1873 3066
1874void 3067void
1875throw (Coro::State self, SV *throw = &PL_sv_undef) 3068_pool_handler (...)
1876 PROTOTYPE: $;$ 3069 CODE:
1877 CODE: 3070 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1878 SvREFCNT_dec (self->throw);
1879 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1880 3071
1881# for async_pool speedup
1882void 3072void
1883_pool_1 (SV *cb) 3073async_pool (SV *cv, ...)
3074 PROTOTYPE: &@
3075 PPCODE:
3076{
3077 HV *hv = (HV *)av_pop (av_async_pool);
3078 AV *av = newAV ();
3079 SV *cb = ST (0);
3080 int i;
3081
3082 av_extend (av, items - 2);
3083 for (i = 1; i < items; ++i)
3084 av_push (av, SvREFCNT_inc_NN (ST (i)));
3085
3086 if ((SV *)hv == &PL_sv_undef)
3087 {
3088 PUSHMARK (SP);
3089 EXTEND (SP, 2);
3090 PUSHs (sv_Coro);
3091 PUSHs ((SV *)cv_pool_handler);
3092 PUTBACK;
3093 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3094 SPAGAIN;
3095
3096 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3097 }
3098
3099 {
3100 struct coro *coro = SvSTATE_hv (hv);
3101
3102 assert (!coro->invoke_cb);
3103 assert (!coro->invoke_av);
3104 coro->invoke_cb = SvREFCNT_inc (cb);
3105 coro->invoke_av = av;
3106 }
3107
3108 api_ready (aTHX_ (SV *)hv);
3109
3110 if (GIMME_V != G_VOID)
3111 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3112 else
3113 SvREFCNT_dec (hv);
3114}
3115
3116SV *
3117rouse_cb ()
3118 PROTOTYPE:
1884 CODE: 3119 CODE:
1885{ 3120 RETVAL = coro_new_rouse_cb (aTHX);
1886 struct coro *coro = SvSTATE (coro_current);
1887 HV *hv = (HV *)SvRV (coro_current);
1888 AV *defav = GvAV (PL_defgv);
1889 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1890 AV *invoke_av;
1891 int i, len;
1892
1893 if (!invoke)
1894 croak ("\3async_pool terminate\2\n");
1895
1896 SvREFCNT_dec (coro->saved_deffh);
1897 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1898
1899 hv_store (hv, "desc", sizeof ("desc") - 1,
1900 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1901
1902 invoke_av = (AV *)SvRV (invoke);
1903 len = av_len (invoke_av);
1904
1905 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1906
1907 if (len > 0)
1908 {
1909 av_fill (defav, len - 1);
1910 for (i = 0; i < len; ++i)
1911 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1912 }
1913
1914 SvREFCNT_dec (invoke);
1915}
1916
1917void
1918_pool_2 (SV *cb)
1919 CODE:
1920{
1921 struct coro *coro = SvSTATE (coro_current);
1922
1923 sv_setsv (cb, &PL_sv_undef);
1924
1925 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1926 coro->saved_deffh = 0;
1927
1928 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1929 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1930 croak ("\3async_pool terminate\2\n");
1931
1932 av_clear (GvAV (PL_defgv));
1933 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1934 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1935
1936 coro->prio = 0;
1937
1938 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1939 api_trace (coro_current, 0);
1940
1941 av_push (av_async_pool, newSVsv (coro_current));
1942}
1943
1944
1945MODULE = Coro::State PACKAGE = Coro::AIO
1946
1947SV *
1948_get_state ()
1949 CODE:
1950{
1951 struct io_state *data;
1952
1953 RETVAL = newSV (sizeof (struct io_state));
1954 data = (struct io_state *)SvPVX (RETVAL);
1955 SvCUR_set (RETVAL, sizeof (struct io_state));
1956 SvPOK_only (RETVAL);
1957
1958 data->errorno = errno;
1959 data->laststype = PL_laststype;
1960 data->laststatval = PL_laststatval;
1961 data->statcache = PL_statcache;
1962}
1963 OUTPUT: 3121 OUTPUT:
1964 RETVAL 3122 RETVAL
1965 3123
1966void 3124void
1967_set_state (char *data_) 3125rouse_wait (...)
1968 PROTOTYPE: $ 3126 PROTOTYPE: ;$
3127 PPCODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3129
3130
3131MODULE = Coro::State PACKAGE = PerlIO::cede
3132
3133BOOT:
3134 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3135
3136
3137MODULE = Coro::State PACKAGE = Coro::Semaphore
3138
3139SV *
3140new (SV *klass, SV *count = 0)
1969 CODE: 3141 CODE:
1970{ 3142 RETVAL = sv_bless (
1971 struct io_state *data = (void *)data_; 3143 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3144 GvSTASH (CvGV (cv))
3145 );
3146 OUTPUT:
3147 RETVAL
1972 3148
1973 errno = data->errorno; 3149# helper for Coro::Channel
1974 PL_laststype = data->laststype; 3150SV *
1975 PL_laststatval = data->laststatval; 3151_alloc (int count)
1976 PL_statcache = data->statcache; 3152 CODE:
1977} 3153 RETVAL = coro_waitarray_new (aTHX_ count);
3154 OUTPUT:
3155 RETVAL
1978 3156
3157SV *
3158count (SV *self)
3159 CODE:
3160 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3161 OUTPUT:
3162 RETVAL
3163
3164void
3165up (SV *self, int adjust = 1)
3166 ALIAS:
3167 adjust = 1
3168 CODE:
3169 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3170
3171void
3172down (...)
3173 CODE:
3174 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3175
3176void
3177wait (...)
3178 CODE:
3179 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3180
3181void
3182try (SV *self)
3183 PPCODE:
3184{
3185 AV *av = (AV *)SvRV (self);
3186 SV *count_sv = AvARRAY (av)[0];
3187 IV count = SvIVX (count_sv);
3188
3189 if (count > 0)
3190 {
3191 --count;
3192 SvIVX (count_sv) = count;
3193 XSRETURN_YES;
3194 }
3195 else
3196 XSRETURN_NO;
3197}
3198
3199void
3200waiters (SV *self)
3201 PPCODE:
3202{
3203 AV *av = (AV *)SvRV (self);
3204 int wcount = AvFILLp (av) + 1 - 1;
3205
3206 if (GIMME_V == G_SCALAR)
3207 XPUSHs (sv_2mortal (newSViv (wcount)));
3208 else
3209 {
3210 int i;
3211 EXTEND (SP, wcount);
3212 for (i = 1; i <= wcount; ++i)
3213 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3214 }
3215}
3216
3217MODULE = Coro::State PACKAGE = Coro::Signal
3218
3219SV *
3220new (SV *klass)
3221 CODE:
3222 RETVAL = sv_bless (
3223 coro_waitarray_new (aTHX_ 0),
3224 GvSTASH (CvGV (cv))
3225 );
3226 OUTPUT:
3227 RETVAL
3228
3229void
3230wait (...)
3231 CODE:
3232 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3233
3234void
3235broadcast (SV *self)
3236 CODE:
3237{
3238 AV *av = (AV *)SvRV (self);
3239 coro_signal_wake (aTHX_ av, AvFILLp (av));
3240}
3241
3242void
3243send (SV *self)
3244 CODE:
3245{
3246 AV *av = (AV *)SvRV (self);
3247
3248 if (AvFILLp (av))
3249 coro_signal_wake (aTHX_ av, 1);
3250 else
3251 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3252}
3253
3254IV
3255awaited (SV *self)
3256 CODE:
3257 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3258 OUTPUT:
3259 RETVAL
3260
3261
3262MODULE = Coro::State PACKAGE = Coro::AnyEvent
3263
3264BOOT:
3265 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3266
3267void
3268_schedule (...)
3269 CODE:
3270{
3271 static int incede;
3272
3273 api_cede_notself (aTHX);
3274
3275 ++incede;
3276 while (coro_nready >= incede && api_cede (aTHX))
3277 ;
3278
3279 sv_setsv (sv_activity, &PL_sv_undef);
3280 if (coro_nready >= incede)
3281 {
3282 PUSHMARK (SP);
3283 PUTBACK;
3284 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3285 }
3286
3287 --incede;
3288}
3289
3290
3291MODULE = Coro::State PACKAGE = Coro::AIO
3292
3293void
3294_register (char *target, char *proto, SV *req)
3295 CODE:
3296{
3297 CV *req_cv = coro_sv_2cv (aTHX_ req);
3298 /* newXSproto doesn't return the CV on 5.8 */
3299 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3300 sv_setpv ((SV *)slf_cv, proto);
3301 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3302}
3303

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